| /* |
| * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., 59 |
| * Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| * |
| * The full GNU General Public License is included in this distribution in the |
| * file called LICENSE. |
| * |
| */ |
| |
| #include <linux/skbuff.h> |
| #include <linux/if_ether.h> |
| #include <linux/netdevice.h> |
| #include <linux/spinlock.h> |
| #include <linux/ethtool.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_bonding.h> |
| #include <linux/pkt_sched.h> |
| #include <net/net_namespace.h> |
| #include <net/bonding.h> |
| #include <net/bond_3ad.h> |
| |
| /* General definitions */ |
| #define AD_SHORT_TIMEOUT 1 |
| #define AD_LONG_TIMEOUT 0 |
| #define AD_STANDBY 0x2 |
| #define AD_MAX_TX_IN_SECOND 3 |
| #define AD_COLLECTOR_MAX_DELAY 0 |
| |
| /* Timer definitions (43.4.4 in the 802.3ad standard) */ |
| #define AD_FAST_PERIODIC_TIME 1 |
| #define AD_SLOW_PERIODIC_TIME 30 |
| #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) |
| #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) |
| #define AD_CHURN_DETECTION_TIME 60 |
| #define AD_AGGREGATE_WAIT_TIME 2 |
| |
| /* Port state definitions (43.4.2.2 in the 802.3ad standard) */ |
| #define AD_STATE_LACP_ACTIVITY 0x1 |
| #define AD_STATE_LACP_TIMEOUT 0x2 |
| #define AD_STATE_AGGREGATION 0x4 |
| #define AD_STATE_SYNCHRONIZATION 0x8 |
| #define AD_STATE_COLLECTING 0x10 |
| #define AD_STATE_DISTRIBUTING 0x20 |
| #define AD_STATE_DEFAULTED 0x40 |
| #define AD_STATE_EXPIRED 0x80 |
| |
| /* Port Variables definitions used by the State Machines (43.4.7 in the |
| * 802.3ad standard) |
| */ |
| #define AD_PORT_BEGIN 0x1 |
| #define AD_PORT_LACP_ENABLED 0x2 |
| #define AD_PORT_ACTOR_CHURN 0x4 |
| #define AD_PORT_PARTNER_CHURN 0x8 |
| #define AD_PORT_READY 0x10 |
| #define AD_PORT_READY_N 0x20 |
| #define AD_PORT_MATCHED 0x40 |
| #define AD_PORT_STANDBY 0x80 |
| #define AD_PORT_SELECTED 0x100 |
| #define AD_PORT_MOVED 0x200 |
| #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) |
| |
| /* Port Key definitions |
| * key is determined according to the link speed, duplex and |
| * user key (which is yet not supported) |
| * -------------------------------------------------------------- |
| * Port key | User key (10 bits) | Speed (5 bits) | Duplex| |
| * -------------------------------------------------------------- |
| * |15 6|5 1|0 |
| */ |
| #define AD_DUPLEX_KEY_MASKS 0x1 |
| #define AD_SPEED_KEY_MASKS 0x3E |
| #define AD_USER_KEY_MASKS 0xFFC0 |
| |
| enum ad_link_speed_type { |
| AD_LINK_SPEED_1MBPS = 1, |
| AD_LINK_SPEED_10MBPS, |
| AD_LINK_SPEED_100MBPS, |
| AD_LINK_SPEED_1000MBPS, |
| AD_LINK_SPEED_2500MBPS, |
| AD_LINK_SPEED_10000MBPS, |
| AD_LINK_SPEED_20000MBPS, |
| AD_LINK_SPEED_40000MBPS, |
| AD_LINK_SPEED_56000MBPS |
| }; |
| |
| /* compare MAC addresses */ |
| #define MAC_ADDRESS_EQUAL(A, B) \ |
| ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) |
| |
| static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; |
| static u16 ad_ticks_per_sec; |
| static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; |
| |
| static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
| |
| /* ================= main 802.3ad protocol functions ================== */ |
| static int ad_lacpdu_send(struct port *port); |
| static int ad_marker_send(struct port *port, struct bond_marker *marker); |
| static void ad_mux_machine(struct port *port, bool *update_slave_arr); |
| static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); |
| static void ad_tx_machine(struct port *port); |
| static void ad_periodic_machine(struct port *port); |
| static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); |
| static void ad_agg_selection_logic(struct aggregator *aggregator, |
| bool *update_slave_arr); |
| static void ad_clear_agg(struct aggregator *aggregator); |
| static void ad_initialize_agg(struct aggregator *aggregator); |
| static void ad_initialize_port(struct port *port, int lacp_fast); |
| static void ad_enable_collecting_distributing(struct port *port, |
| bool *update_slave_arr); |
| static void ad_disable_collecting_distributing(struct port *port, |
| bool *update_slave_arr); |
| static void ad_marker_info_received(struct bond_marker *marker_info, |
| struct port *port); |
| static void ad_marker_response_received(struct bond_marker *marker, |
| struct port *port); |
| |
| |
| /* ================= api to bonding and kernel code ================== */ |
| |
| /** |
| * __get_bond_by_port - get the port's bonding struct |
| * @port: the port we're looking at |
| * |
| * Return @port's bonding struct, or %NULL if it can't be found. |
| */ |
| static inline struct bonding *__get_bond_by_port(struct port *port) |
| { |
| if (port->slave == NULL) |
| return NULL; |
| |
| return bond_get_bond_by_slave(port->slave); |
| } |
| |
| /** |
| * __get_first_agg - get the first aggregator in the bond |
| * @bond: the bond we're looking at |
| * |
| * Return the aggregator of the first slave in @bond, or %NULL if it can't be |
| * found. |
| * The caller must hold RCU or RTNL lock. |
| */ |
| static inline struct aggregator *__get_first_agg(struct port *port) |
| { |
| struct bonding *bond = __get_bond_by_port(port); |
| struct slave *first_slave; |
| struct aggregator *agg; |
| |
| /* If there's no bond for this port, or bond has no slaves */ |
| if (bond == NULL) |
| return NULL; |
| |
| rcu_read_lock(); |
| first_slave = bond_first_slave_rcu(bond); |
| agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; |
| rcu_read_unlock(); |
| |
| return agg; |
| } |
| |
| /** |
| * __agg_has_partner - see if we have a partner |
| * @agg: the agregator we're looking at |
| * |
| * Return nonzero if aggregator has a partner (denoted by a non-zero ether |
| * address for the partner). Return 0 if not. |
| */ |
| static inline int __agg_has_partner(struct aggregator *agg) |
| { |
| return !is_zero_ether_addr(agg->partner_system.mac_addr_value); |
| } |
| |
| /** |
| * __disable_port - disable the port's slave |
| * @port: the port we're looking at |
| */ |
| static inline void __disable_port(struct port *port) |
| { |
| bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); |
| } |
| |
| /** |
| * __enable_port - enable the port's slave, if it's up |
| * @port: the port we're looking at |
| */ |
| static inline void __enable_port(struct port *port) |
| { |
| struct slave *slave = port->slave; |
| |
| if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) |
| bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); |
| } |
| |
| /** |
| * __port_is_enabled - check if the port's slave is in active state |
| * @port: the port we're looking at |
| */ |
| static inline int __port_is_enabled(struct port *port) |
| { |
| return bond_is_active_slave(port->slave); |
| } |
| |
| /** |
| * __get_agg_selection_mode - get the aggregator selection mode |
| * @port: the port we're looking at |
| * |
| * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
| */ |
| static inline u32 __get_agg_selection_mode(struct port *port) |
| { |
| struct bonding *bond = __get_bond_by_port(port); |
| |
| if (bond == NULL) |
| return BOND_AD_STABLE; |
| |
| return bond->params.ad_select; |
| } |
| |
| /** |
| * __check_agg_selection_timer - check if the selection timer has expired |
| * @port: the port we're looking at |
| */ |
| static inline int __check_agg_selection_timer(struct port *port) |
| { |
| struct bonding *bond = __get_bond_by_port(port); |
| |
| if (bond == NULL) |
| return 0; |
| |
| return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; |
| } |
| |
| /** |
| * __get_link_speed - get a port's speed |
| * @port: the port we're looking at |
| * |
| * Return @port's speed in 802.3ad enum format. i.e. one of: |
| * 0, |
| * %AD_LINK_SPEED_10MBPS, |
| * %AD_LINK_SPEED_100MBPS, |
| * %AD_LINK_SPEED_1000MBPS, |
| * %AD_LINK_SPEED_2500MBPS, |
| * %AD_LINK_SPEED_10000MBPS |
| * %AD_LINK_SPEED_20000MBPS |
| * %AD_LINK_SPEED_40000MBPS |
| * %AD_LINK_SPEED_56000MBPS |
| */ |
| static u16 __get_link_speed(struct port *port) |
| { |
| struct slave *slave = port->slave; |
| u16 speed; |
| |
| /* this if covers only a special case: when the configuration starts |
| * with link down, it sets the speed to 0. |
| * This is done in spite of the fact that the e100 driver reports 0 |
| * to be compatible with MVT in the future. |
| */ |
| if (slave->link != BOND_LINK_UP) |
| speed = 0; |
| else { |
| switch (slave->speed) { |
| case SPEED_10: |
| speed = AD_LINK_SPEED_10MBPS; |
| break; |
| |
| case SPEED_100: |
| speed = AD_LINK_SPEED_100MBPS; |
| break; |
| |
| case SPEED_1000: |
| speed = AD_LINK_SPEED_1000MBPS; |
| break; |
| |
| case SPEED_2500: |
| speed = AD_LINK_SPEED_2500MBPS; |
| break; |
| |
| case SPEED_10000: |
| speed = AD_LINK_SPEED_10000MBPS; |
| break; |
| |
| case SPEED_20000: |
| speed = AD_LINK_SPEED_20000MBPS; |
| break; |
| |
| case SPEED_40000: |
| speed = AD_LINK_SPEED_40000MBPS; |
| break; |
| |
| case SPEED_56000: |
| speed = AD_LINK_SPEED_56000MBPS; |
| break; |
| |
| default: |
| /* unknown speed value from ethtool. shouldn't happen */ |
| speed = 0; |
| break; |
| } |
| } |
| |
| netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", |
| port->actor_port_number, speed); |
| return speed; |
| } |
| |
| /** |
| * __get_duplex - get a port's duplex |
| * @port: the port we're looking at |
| * |
| * Return @port's duplex in 802.3ad bitmask format. i.e.: |
| * 0x01 if in full duplex |
| * 0x00 otherwise |
| */ |
| static u8 __get_duplex(struct port *port) |
| { |
| struct slave *slave = port->slave; |
| u8 retval; |
| |
| /* handling a special case: when the configuration starts with |
| * link down, it sets the duplex to 0. |
| */ |
| if (slave->link != BOND_LINK_UP) { |
| retval = 0x0; |
| } else { |
| switch (slave->duplex) { |
| case DUPLEX_FULL: |
| retval = 0x1; |
| netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
| port->actor_port_number); |
| break; |
| case DUPLEX_HALF: |
| default: |
| retval = 0x0; |
| netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
| port->actor_port_number); |
| break; |
| } |
| } |
| return retval; |
| } |
| |
| /* Conversions */ |
| |
| /** |
| * __ad_timer_to_ticks - convert a given timer type to AD module ticks |
| * @timer_type: which timer to operate |
| * @par: timer parameter. see below |
| * |
| * If @timer_type is %current_while_timer, @par indicates long/short timer. |
| * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, |
| * %SLOW_PERIODIC_TIME. |
| */ |
| static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) |
| { |
| u16 retval = 0; /* to silence the compiler */ |
| |
| switch (timer_type) { |
| case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
| if (par) |
| retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
| else |
| retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
| break; |
| case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
| retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
| break; |
| case AD_PERIODIC_TIMER: /* for periodic machine */ |
| retval = (par*ad_ticks_per_sec); /* long timeout */ |
| break; |
| case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
| retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
| break; |
| case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
| retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
| break; |
| } |
| |
| return retval; |
| } |
| |
| |
| /* ================= ad_rx_machine helper functions ================== */ |
| |
| /** |
| * __choose_matched - update a port's matched variable from a received lacpdu |
| * @lacpdu: the lacpdu we've received |
| * @port: the port we're looking at |
| * |
| * Update the value of the matched variable, using parameter values from a |
| * newly received lacpdu. Parameter values for the partner carried in the |
| * received PDU are compared with the corresponding operational parameter |
| * values for the actor. Matched is set to TRUE if all of these parameters |
| * match and the PDU parameter partner_state.aggregation has the same value as |
| * actor_oper_port_state.aggregation and lacp will actively maintain the link |
| * in the aggregation. Matched is also set to TRUE if the value of |
| * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates |
| * an individual link and lacp will actively maintain the link. Otherwise, |
| * matched is set to FALSE. LACP is considered to be actively maintaining the |
| * link if either the PDU's actor_state.lacp_activity variable is TRUE or both |
| * the actor's actor_oper_port_state.lacp_activity and the PDU's |
| * partner_state.lacp_activity variables are TRUE. |
| * |
| * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is |
| * used here to implement the language from 802.3ad 43.4.9 that requires |
| * recordPDU to "match" the LACPDU parameters to the stored values. |
| */ |
| static void __choose_matched(struct lacpdu *lacpdu, struct port *port) |
| { |
| /* check if all parameters are alike |
| * or this is individual link(aggregation == FALSE) |
| * then update the state machine Matched variable. |
| */ |
| if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
| (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && |
| MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
| (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
| (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && |
| ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || |
| ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
| ) { |
| port->sm_vars |= AD_PORT_MATCHED; |
| } else { |
| port->sm_vars &= ~AD_PORT_MATCHED; |
| } |
| } |
| |
| /** |
| * __record_pdu - record parameters from a received lacpdu |
| * @lacpdu: the lacpdu we've received |
| * @port: the port we're looking at |
| * |
| * Record the parameter values for the Actor carried in a received lacpdu as |
| * the current partner operational parameter values and sets |
| * actor_oper_port_state.defaulted to FALSE. |
| */ |
| static void __record_pdu(struct lacpdu *lacpdu, struct port *port) |
| { |
| if (lacpdu && port) { |
| struct port_params *partner = &port->partner_oper; |
| |
| __choose_matched(lacpdu, port); |
| /* record the new parameter values for the partner |
| * operational |
| */ |
| partner->port_number = ntohs(lacpdu->actor_port); |
| partner->port_priority = ntohs(lacpdu->actor_port_priority); |
| partner->system = lacpdu->actor_system; |
| partner->system_priority = ntohs(lacpdu->actor_system_priority); |
| partner->key = ntohs(lacpdu->actor_key); |
| partner->port_state = lacpdu->actor_state; |
| |
| /* set actor_oper_port_state.defaulted to FALSE */ |
| port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
| |
| /* set the partner sync. to on if the partner is sync, |
| * and the port is matched |
| */ |
| if ((port->sm_vars & AD_PORT_MATCHED) && |
| (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { |
| partner->port_state |= AD_STATE_SYNCHRONIZATION; |
| pr_debug("%s partner sync=1\n", port->slave->dev->name); |
| } else { |
| partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
| pr_debug("%s partner sync=0\n", port->slave->dev->name); |
| } |
| } |
| } |
| |
| /** |
| * __record_default - record default parameters |
| * @port: the port we're looking at |
| * |
| * This function records the default parameter values for the partner carried |
| * in the Partner Admin parameters as the current partner operational parameter |
| * values and sets actor_oper_port_state.defaulted to TRUE. |
| */ |
| static void __record_default(struct port *port) |
| { |
| if (port) { |
| /* record the partner admin parameters */ |
| memcpy(&port->partner_oper, &port->partner_admin, |
| sizeof(struct port_params)); |
| |
| /* set actor_oper_port_state.defaulted to true */ |
| port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
| } |
| } |
| |
| /** |
| * __update_selected - update a port's Selected variable from a received lacpdu |
| * @lacpdu: the lacpdu we've received |
| * @port: the port we're looking at |
| * |
| * Update the value of the selected variable, using parameter values from a |
| * newly received lacpdu. The parameter values for the Actor carried in the |
| * received PDU are compared with the corresponding operational parameter |
| * values for the ports partner. If one or more of the comparisons shows that |
| * the value(s) received in the PDU differ from the current operational values, |
| * then selected is set to FALSE and actor_oper_port_state.synchronization is |
| * set to out_of_sync. Otherwise, selected remains unchanged. |
| */ |
| static void __update_selected(struct lacpdu *lacpdu, struct port *port) |
| { |
| if (lacpdu && port) { |
| const struct port_params *partner = &port->partner_oper; |
| |
| /* check if any parameter is different then |
| * update the state machine selected variable. |
| */ |
| if (ntohs(lacpdu->actor_port) != partner->port_number || |
| ntohs(lacpdu->actor_port_priority) != partner->port_priority || |
| !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
| ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
| ntohs(lacpdu->actor_key) != partner->key || |
| (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { |
| port->sm_vars &= ~AD_PORT_SELECTED; |
| } |
| } |
| } |
| |
| /** |
| * __update_default_selected - update a port's Selected variable from Partner |
| * @port: the port we're looking at |
| * |
| * This function updates the value of the selected variable, using the partner |
| * administrative parameter values. The administrative values are compared with |
| * the corresponding operational parameter values for the partner. If one or |
| * more of the comparisons shows that the administrative value(s) differ from |
| * the current operational values, then Selected is set to FALSE and |
| * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, |
| * Selected remains unchanged. |
| */ |
| static void __update_default_selected(struct port *port) |
| { |
| if (port) { |
| const struct port_params *admin = &port->partner_admin; |
| const struct port_params *oper = &port->partner_oper; |
| |
| /* check if any parameter is different then |
| * update the state machine selected variable. |
| */ |
| if (admin->port_number != oper->port_number || |
| admin->port_priority != oper->port_priority || |
| !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
| admin->system_priority != oper->system_priority || |
| admin->key != oper->key || |
| (admin->port_state & AD_STATE_AGGREGATION) |
| != (oper->port_state & AD_STATE_AGGREGATION)) { |
| port->sm_vars &= ~AD_PORT_SELECTED; |
| } |
| } |
| } |
| |
| /** |
| * __update_ntt - update a port's ntt variable from a received lacpdu |
| * @lacpdu: the lacpdu we've received |
| * @port: the port we're looking at |
| * |
| * Updates the value of the ntt variable, using parameter values from a newly |
| * received lacpdu. The parameter values for the partner carried in the |
| * received PDU are compared with the corresponding operational parameter |
| * values for the Actor. If one or more of the comparisons shows that the |
| * value(s) received in the PDU differ from the current operational values, |
| * then ntt is set to TRUE. Otherwise, ntt remains unchanged. |
| */ |
| static void __update_ntt(struct lacpdu *lacpdu, struct port *port) |
| { |
| /* validate lacpdu and port */ |
| if (lacpdu && port) { |
| /* check if any parameter is different then |
| * update the port->ntt. |
| */ |
| if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
| (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || |
| !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
| (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
| (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || |
| ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
| ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || |
| ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || |
| ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) |
| ) { |
| port->ntt = true; |
| } |
| } |
| } |
| |
| /** |
| * __agg_ports_are_ready - check if all ports in an aggregator are ready |
| * @aggregator: the aggregator we're looking at |
| * |
| */ |
| static int __agg_ports_are_ready(struct aggregator *aggregator) |
| { |
| struct port *port; |
| int retval = 1; |
| |
| if (aggregator) { |
| /* scan all ports in this aggregator to verfy if they are |
| * all ready. |
| */ |
| for (port = aggregator->lag_ports; |
| port; |
| port = port->next_port_in_aggregator) { |
| if (!(port->sm_vars & AD_PORT_READY_N)) { |
| retval = 0; |
| break; |
| } |
| } |
| } |
| |
| return retval; |
| } |
| |
| /** |
| * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator |
| * @aggregator: the aggregator we're looking at |
| * @val: Should the ports' ready bit be set on or off |
| * |
| */ |
| static void __set_agg_ports_ready(struct aggregator *aggregator, int val) |
| { |
| struct port *port; |
| |
| for (port = aggregator->lag_ports; port; |
| port = port->next_port_in_aggregator) { |
| if (val) |
| port->sm_vars |= AD_PORT_READY; |
| else |
| port->sm_vars &= ~AD_PORT_READY; |
| } |
| } |
| |
| /** |
| * __get_agg_bandwidth - get the total bandwidth of an aggregator |
| * @aggregator: the aggregator we're looking at |
| * |
| */ |
| static u32 __get_agg_bandwidth(struct aggregator *aggregator) |
| { |
| u32 bandwidth = 0; |
| |
| if (aggregator->num_of_ports) { |
| switch (__get_link_speed(aggregator->lag_ports)) { |
| case AD_LINK_SPEED_1MBPS: |
| bandwidth = aggregator->num_of_ports; |
| break; |
| case AD_LINK_SPEED_10MBPS: |
| bandwidth = aggregator->num_of_ports * 10; |
| break; |
| case AD_LINK_SPEED_100MBPS: |
| bandwidth = aggregator->num_of_ports * 100; |
| break; |
| case AD_LINK_SPEED_1000MBPS: |
| bandwidth = aggregator->num_of_ports * 1000; |
| break; |
| case AD_LINK_SPEED_2500MBPS: |
| bandwidth = aggregator->num_of_ports * 2500; |
| break; |
| case AD_LINK_SPEED_10000MBPS: |
| bandwidth = aggregator->num_of_ports * 10000; |
| break; |
| case AD_LINK_SPEED_20000MBPS: |
| bandwidth = aggregator->num_of_ports * 20000; |
| break; |
| case AD_LINK_SPEED_40000MBPS: |
| bandwidth = aggregator->num_of_ports * 40000; |
| break; |
| case AD_LINK_SPEED_56000MBPS: |
| bandwidth = aggregator->num_of_ports * 56000; |
| break; |
| default: |
| bandwidth = 0; /* to silence the compiler */ |
| } |
| } |
| return bandwidth; |
| } |
| |
| /** |
| * __get_active_agg - get the current active aggregator |
| * @aggregator: the aggregator we're looking at |
| * |
| * Caller must hold RCU lock. |
| */ |
| static struct aggregator *__get_active_agg(struct aggregator *aggregator) |
| { |
| struct bonding *bond = aggregator->slave->bond; |
| struct list_head *iter; |
| struct slave *slave; |
| |
| bond_for_each_slave_rcu(bond, slave, iter) |
| if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
| return &(SLAVE_AD_INFO(slave)->aggregator); |
| |
| return NULL; |
| } |
| |
| /** |
| * __update_lacpdu_from_port - update a port's lacpdu fields |
| * @port: the port we're looking at |
| */ |
| static inline void __update_lacpdu_from_port(struct port *port) |
| { |
| struct lacpdu *lacpdu = &port->lacpdu; |
| const struct port_params *partner = &port->partner_oper; |
| |
| /* update current actual Actor parameters |
| * lacpdu->subtype initialized |
| * lacpdu->version_number initialized |
| * lacpdu->tlv_type_actor_info initialized |
| * lacpdu->actor_information_length initialized |
| */ |
| |
| lacpdu->actor_system_priority = htons(port->actor_system_priority); |
| lacpdu->actor_system = port->actor_system; |
| lacpdu->actor_key = htons(port->actor_oper_port_key); |
| lacpdu->actor_port_priority = htons(port->actor_port_priority); |
| lacpdu->actor_port = htons(port->actor_port_number); |
| lacpdu->actor_state = port->actor_oper_port_state; |
| pr_debug("update lacpdu: %s, actor port state %x\n", |
| port->slave->dev->name, port->actor_oper_port_state); |
| |
| /* lacpdu->reserved_3_1 initialized |
| * lacpdu->tlv_type_partner_info initialized |
| * lacpdu->partner_information_length initialized |
| */ |
| |
| lacpdu->partner_system_priority = htons(partner->system_priority); |
| lacpdu->partner_system = partner->system; |
| lacpdu->partner_key = htons(partner->key); |
| lacpdu->partner_port_priority = htons(partner->port_priority); |
| lacpdu->partner_port = htons(partner->port_number); |
| lacpdu->partner_state = partner->port_state; |
| |
| /* lacpdu->reserved_3_2 initialized |
| * lacpdu->tlv_type_collector_info initialized |
| * lacpdu->collector_information_length initialized |
| * collector_max_delay initialized |
| * reserved_12[12] initialized |
| * tlv_type_terminator initialized |
| * terminator_length initialized |
| * reserved_50[50] initialized |
| */ |
| } |
| |
| /* ================= main 802.3ad protocol code ========================= */ |
| |
| /** |
| * ad_lacpdu_send - send out a lacpdu packet on a given port |
| * @port: the port we're looking at |
| * |
| * Returns: 0 on success |
| * < 0 on error |
| */ |
| static int ad_lacpdu_send(struct port *port) |
| { |
| struct slave *slave = port->slave; |
| struct sk_buff *skb; |
| struct lacpdu_header *lacpdu_header; |
| int length = sizeof(struct lacpdu_header); |
| |
| skb = dev_alloc_skb(length); |
| if (!skb) |
| return -ENOMEM; |
| |
| skb->dev = slave->dev; |
| skb_reset_mac_header(skb); |
| skb->network_header = skb->mac_header + ETH_HLEN; |
| skb->protocol = PKT_TYPE_LACPDU; |
| skb->priority = TC_PRIO_CONTROL; |
| |
| lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); |
| |
| ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
| /* Note: source address is set to be the member's PERMANENT address, |
| * because we use it to identify loopback lacpdus in receive. |
| */ |
| ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
| lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
| |
| lacpdu_header->lacpdu = port->lacpdu; |
| |
| dev_queue_xmit(skb); |
| |
| return 0; |
| } |
| |
| /** |
| * ad_marker_send - send marker information/response on a given port |
| * @port: the port we're looking at |
| * @marker: marker data to send |
| * |
| * Returns: 0 on success |
| * < 0 on error |
| */ |
| static int ad_marker_send(struct port *port, struct bond_marker *marker) |
| { |
| struct slave *slave = port->slave; |
| struct sk_buff *skb; |
| struct bond_marker_header *marker_header; |
| int length = sizeof(struct bond_marker_header); |
| |
| skb = dev_alloc_skb(length + 16); |
| if (!skb) |
| return -ENOMEM; |
| |
| skb_reserve(skb, 16); |
| |
| skb->dev = slave->dev; |
| skb_reset_mac_header(skb); |
| skb->network_header = skb->mac_header + ETH_HLEN; |
| skb->protocol = PKT_TYPE_LACPDU; |
| |
| marker_header = (struct bond_marker_header *)skb_put(skb, length); |
| |
| ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
| /* Note: source address is set to be the member's PERMANENT address, |
| * because we use it to identify loopback MARKERs in receive. |
| */ |
| ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
| marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
| |
| marker_header->marker = *marker; |
| |
| dev_queue_xmit(skb); |
| |
| return 0; |
| } |
| |
| /** |
| * ad_mux_machine - handle a port's mux state machine |
| * @port: the port we're looking at |
| * @update_slave_arr: Does slave array need update? |
| */ |
| static void ad_mux_machine(struct port *port, bool *update_slave_arr) |
| { |
| mux_states_t last_state; |
| |
| /* keep current State Machine state to compare later if it was |
| * changed |
| */ |
| last_state = port->sm_mux_state; |
| |
| if (port->sm_vars & AD_PORT_BEGIN) { |
| port->sm_mux_state = AD_MUX_DETACHED; |
| } else { |
| switch (port->sm_mux_state) { |
| case AD_MUX_DETACHED: |
| if ((port->sm_vars & AD_PORT_SELECTED) |
| || (port->sm_vars & AD_PORT_STANDBY)) |
| /* if SELECTED or STANDBY */ |
| port->sm_mux_state = AD_MUX_WAITING; |
| break; |
| case AD_MUX_WAITING: |
| /* if SELECTED == FALSE return to DETACH state */ |
| if (!(port->sm_vars & AD_PORT_SELECTED)) { |
| port->sm_vars &= ~AD_PORT_READY_N; |
| /* in order to withhold the Selection Logic to |
| * check all ports READY_N value every callback |
| * cycle to update ready variable, we check |
| * READY_N and update READY here |
| */ |
| __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
| port->sm_mux_state = AD_MUX_DETACHED; |
| break; |
| } |
| |
| /* check if the wait_while_timer expired */ |
| if (port->sm_mux_timer_counter |
| && !(--port->sm_mux_timer_counter)) |
| port->sm_vars |= AD_PORT_READY_N; |
| |
| /* in order to withhold the selection logic to check |
| * all ports READY_N value every callback cycle to |
| * update ready variable, we check READY_N and update |
| * READY here |
| */ |
| __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
| |
| /* if the wait_while_timer expired, and the port is |
| * in READY state, move to ATTACHED state |
| */ |
| if ((port->sm_vars & AD_PORT_READY) |
| && !port->sm_mux_timer_counter) |
| port->sm_mux_state = AD_MUX_ATTACHED; |
| break; |
| case AD_MUX_ATTACHED: |
| /* check also if agg_select_timer expired (so the |
| * edable port will take place only after this timer) |
| */ |
| if ((port->sm_vars & AD_PORT_SELECTED) && |
| (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && |
| !__check_agg_selection_timer(port)) { |
| if (port->aggregator->is_active) |
| port->sm_mux_state = |
| AD_MUX_COLLECTING_DISTRIBUTING; |
| } else if (!(port->sm_vars & AD_PORT_SELECTED) || |
| (port->sm_vars & AD_PORT_STANDBY)) { |
| /* if UNSELECTED or STANDBY */ |
| port->sm_vars &= ~AD_PORT_READY_N; |
| /* in order to withhold the selection logic to |
| * check all ports READY_N value every callback |
| * cycle to update ready variable, we check |
| * READY_N and update READY here |
| */ |
| __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
| port->sm_mux_state = AD_MUX_DETACHED; |
| } else if (port->aggregator->is_active) { |
| port->actor_oper_port_state |= |
| AD_STATE_SYNCHRONIZATION; |
| } |
| break; |
| case AD_MUX_COLLECTING_DISTRIBUTING: |
| if (!(port->sm_vars & AD_PORT_SELECTED) || |
| (port->sm_vars & AD_PORT_STANDBY) || |
| !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || |
| !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { |
| port->sm_mux_state = AD_MUX_ATTACHED; |
| } else { |
| /* if port state hasn't changed make |
| * sure that a collecting distributing |
| * port in an active aggregator is enabled |
| */ |
| if (port->aggregator && |
| port->aggregator->is_active && |
| !__port_is_enabled(port)) { |
| |
| __enable_port(port); |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* check if the state machine was changed */ |
| if (port->sm_mux_state != last_state) { |
| pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", |
| port->actor_port_number, |
| port->slave->dev->name, |
| last_state, |
| port->sm_mux_state); |
| switch (port->sm_mux_state) { |
| case AD_MUX_DETACHED: |
| port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
| ad_disable_collecting_distributing(port, |
| update_slave_arr); |
| port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
| port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; |
| port->ntt = true; |
| break; |
| case AD_MUX_WAITING: |
| port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); |
| break; |
| case AD_MUX_ATTACHED: |
| if (port->aggregator->is_active) |
| port->actor_oper_port_state |= |
| AD_STATE_SYNCHRONIZATION; |
| else |
| port->actor_oper_port_state &= |
| ~AD_STATE_SYNCHRONIZATION; |
| port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
| port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; |
| ad_disable_collecting_distributing(port, |
| update_slave_arr); |
| port->ntt = true; |
| break; |
| case AD_MUX_COLLECTING_DISTRIBUTING: |
| port->actor_oper_port_state |= AD_STATE_COLLECTING; |
| port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; |
| port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
| ad_enable_collecting_distributing(port, |
| update_slave_arr); |
| port->ntt = true; |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * ad_rx_machine - handle a port's rx State Machine |
| * @lacpdu: the lacpdu we've received |
| * @port: the port we're looking at |
| * |
| * If lacpdu arrived, stop previous timer (if exists) and set the next state as |
| * CURRENT. If timer expired set the state machine in the proper state. |
| * In other cases, this function checks if we need to switch to other state. |
| */ |
| static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) |
| { |
| rx_states_t last_state; |
| |
| /* keep current State Machine state to compare later if it was |
| * changed |
| */ |
| last_state = port->sm_rx_state; |
| |
| /* check if state machine should change state */ |
| |
| /* first, check if port was reinitialized */ |
| if (port->sm_vars & AD_PORT_BEGIN) { |
| port->sm_rx_state = AD_RX_INITIALIZE; |
| port->sm_vars |= AD_PORT_CHURNED; |
| /* check if port is not enabled */ |
| } else if (!(port->sm_vars & AD_PORT_BEGIN) |
| && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) |
| port->sm_rx_state = AD_RX_PORT_DISABLED; |
| /* check if new lacpdu arrived */ |
| else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || |
| (port->sm_rx_state == AD_RX_DEFAULTED) || |
| (port->sm_rx_state == AD_RX_CURRENT))) { |
| if (port->sm_rx_state != AD_RX_CURRENT) |
| port->sm_vars |= AD_PORT_CHURNED; |
| port->sm_rx_timer_counter = 0; |
| port->sm_rx_state = AD_RX_CURRENT; |
| } else { |
| /* if timer is on, and if it is expired */ |
| if (port->sm_rx_timer_counter && |
| !(--port->sm_rx_timer_counter)) { |
| switch (port->sm_rx_state) { |
| case AD_RX_EXPIRED: |
| port->sm_rx_state = AD_RX_DEFAULTED; |
| break; |
| case AD_RX_CURRENT: |
| port->sm_rx_state = AD_RX_EXPIRED; |
| break; |
| default: |
| break; |
| } |
| } else { |
| /* if no lacpdu arrived and no timer is on */ |
| switch (port->sm_rx_state) { |
| case AD_RX_PORT_DISABLED: |
| if (port->sm_vars & AD_PORT_MOVED) |
| port->sm_rx_state = AD_RX_INITIALIZE; |
| else if (port->is_enabled |
| && (port->sm_vars |
| & AD_PORT_LACP_ENABLED)) |
| port->sm_rx_state = AD_RX_EXPIRED; |
| else if (port->is_enabled |
| && ((port->sm_vars |
| & AD_PORT_LACP_ENABLED) == 0)) |
| port->sm_rx_state = AD_RX_LACP_DISABLED; |
| break; |
| default: |
| break; |
| |
| } |
| } |
| } |
| |
| /* check if the State machine was changed or new lacpdu arrived */ |
| if ((port->sm_rx_state != last_state) || (lacpdu)) { |
| pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", |
| port->actor_port_number, |
| port->slave->dev->name, |
| last_state, |
| port->sm_rx_state); |
| switch (port->sm_rx_state) { |
| case AD_RX_INITIALIZE: |
| if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) |
| port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
| else |
| port->sm_vars |= AD_PORT_LACP_ENABLED; |
| port->sm_vars &= ~AD_PORT_SELECTED; |
| __record_default(port); |
| port->actor_oper_port_state &= ~AD_STATE_EXPIRED; |
| port->sm_vars &= ~AD_PORT_MOVED; |
| port->sm_rx_state = AD_RX_PORT_DISABLED; |
| |
| /* Fall Through */ |
| case AD_RX_PORT_DISABLED: |
| port->sm_vars &= ~AD_PORT_MATCHED; |
| break; |
| case AD_RX_LACP_DISABLED: |
| port->sm_vars &= ~AD_PORT_SELECTED; |
| __record_default(port); |
| port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
| port->sm_vars |= AD_PORT_MATCHED; |
| port->actor_oper_port_state &= ~AD_STATE_EXPIRED; |
| break; |
| case AD_RX_EXPIRED: |
| /* Reset of the Synchronization flag (Standard 43.4.12) |
| * This reset cause to disable this port in the |
| * COLLECTING_DISTRIBUTING state of the mux machine in |
| * case of EXPIRED even if LINK_DOWN didn't arrive for |
| * the port. |
| */ |
| port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
| port->sm_vars &= ~AD_PORT_MATCHED; |
| port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; |
| port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
| port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
| port->actor_oper_port_state |= AD_STATE_EXPIRED; |
| port->sm_vars |= AD_PORT_CHURNED; |
| break; |
| case AD_RX_DEFAULTED: |
| __update_default_selected(port); |
| __record_default(port); |
| port->sm_vars |= AD_PORT_MATCHED; |
| port->actor_oper_port_state &= ~AD_STATE_EXPIRED; |
| break; |
| case AD_RX_CURRENT: |
| /* detect loopback situation */ |
| if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
| &(port->actor_system))) { |
| netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
| "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
| port->slave->dev->name); |
| return; |
| } |
| __update_selected(lacpdu, port); |
| __update_ntt(lacpdu, port); |
| __record_pdu(lacpdu, port); |
| port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
| port->actor_oper_port_state &= ~AD_STATE_EXPIRED; |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * ad_churn_machine - handle port churn's state machine |
| * @port: the port we're looking at |
| * |
| */ |
| static void ad_churn_machine(struct port *port) |
| { |
| if (port->sm_vars & AD_PORT_CHURNED) { |
| port->sm_vars &= ~AD_PORT_CHURNED; |
| port->sm_churn_actor_state = AD_CHURN_MONITOR; |
| port->sm_churn_partner_state = AD_CHURN_MONITOR; |
| port->sm_churn_actor_timer_counter = |
| __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); |
| port->sm_churn_partner_timer_counter = |
| __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); |
| return; |
| } |
| if (port->sm_churn_actor_timer_counter && |
| !(--port->sm_churn_actor_timer_counter) && |
| port->sm_churn_actor_state == AD_CHURN_MONITOR) { |
| if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { |
| port->sm_churn_actor_state = AD_NO_CHURN; |
| } else { |
| port->churn_actor_count++; |
| port->sm_churn_actor_state = AD_CHURN; |
| } |
| } |
| if (port->sm_churn_partner_timer_counter && |
| !(--port->sm_churn_partner_timer_counter) && |
| port->sm_churn_partner_state == AD_CHURN_MONITOR) { |
| if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { |
| port->sm_churn_partner_state = AD_NO_CHURN; |
| } else { |
| port->churn_partner_count++; |
| port->sm_churn_partner_state = AD_CHURN; |
| } |
| } |
| } |
| |
| /** |
| * ad_tx_machine - handle a port's tx state machine |
| * @port: the port we're looking at |
| */ |
| static void ad_tx_machine(struct port *port) |
| { |
| /* check if tx timer expired, to verify that we do not send more than |
| * 3 packets per second |
| */ |
| if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
| /* check if there is something to send */ |
| if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
| __update_lacpdu_from_port(port); |
| |
| if (ad_lacpdu_send(port) >= 0) { |
| pr_debug("Sent LACPDU on port %d\n", |
| port->actor_port_number); |
| |
| /* mark ntt as false, so it will not be sent |
| * again until demanded |
| */ |
| port->ntt = false; |
| } |
| } |
| /* restart tx timer(to verify that we will not exceed |
| * AD_MAX_TX_IN_SECOND |
| */ |
| port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
| } |
| } |
| |
| /** |
| * ad_periodic_machine - handle a port's periodic state machine |
| * @port: the port we're looking at |
| * |
| * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. |
| */ |
| static void ad_periodic_machine(struct port *port) |
| { |
| periodic_states_t last_state; |
| |
| /* keep current state machine state to compare later if it was changed */ |
| last_state = port->sm_periodic_state; |
| |
| /* check if port was reinitialized */ |
| if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
| (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
| ) { |
| port->sm_periodic_state = AD_NO_PERIODIC; |
| } |
| /* check if state machine should change state */ |
| else if (port->sm_periodic_timer_counter) { |
| /* check if periodic state machine expired */ |
| if (!(--port->sm_periodic_timer_counter)) { |
| /* if expired then do tx */ |
| port->sm_periodic_state = AD_PERIODIC_TX; |
| } else { |
| /* If not expired, check if there is some new timeout |
| * parameter from the partner state |
| */ |
| switch (port->sm_periodic_state) { |
| case AD_FAST_PERIODIC: |
| if (!(port->partner_oper.port_state |
| & AD_STATE_LACP_TIMEOUT)) |
| port->sm_periodic_state = AD_SLOW_PERIODIC; |
| break; |
| case AD_SLOW_PERIODIC: |
| if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
| port->sm_periodic_timer_counter = 0; |
| port->sm_periodic_state = AD_PERIODIC_TX; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| } else { |
| switch (port->sm_periodic_state) { |
| case AD_NO_PERIODIC: |
| port->sm_periodic_state = AD_FAST_PERIODIC; |
| break; |
| case AD_PERIODIC_TX: |
| if (!(port->partner_oper.port_state & |
| AD_STATE_LACP_TIMEOUT)) |
| port->sm_periodic_state = AD_SLOW_PERIODIC; |
| else |
| port->sm_periodic_state = AD_FAST_PERIODIC; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* check if the state machine was changed */ |
| if (port->sm_periodic_state != last_state) { |
| pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
| port->actor_port_number, last_state, |
| port->sm_periodic_state); |
| switch (port->sm_periodic_state) { |
| case AD_NO_PERIODIC: |
| port->sm_periodic_timer_counter = 0; |
| break; |
| case AD_FAST_PERIODIC: |
| /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
| port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; |
| break; |
| case AD_SLOW_PERIODIC: |
| /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
| port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; |
| break; |
| case AD_PERIODIC_TX: |
| port->ntt = true; |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * ad_port_selection_logic - select aggregation groups |
| * @port: the port we're looking at |
| * @update_slave_arr: Does slave array need update? |
| * |
| * Select aggregation groups, and assign each port for it's aggregetor. The |
| * selection logic is called in the inititalization (after all the handshkes), |
| * and after every lacpdu receive (if selected is off). |
| */ |
| static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) |
| { |
| struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; |
| struct port *last_port = NULL, *curr_port; |
| struct list_head *iter; |
| struct bonding *bond; |
| struct slave *slave; |
| int found = 0; |
| |
| /* if the port is already Selected, do nothing */ |
| if (port->sm_vars & AD_PORT_SELECTED) |
| return; |
| |
| bond = __get_bond_by_port(port); |
| |
| /* if the port is connected to other aggregator, detach it */ |
| if (port->aggregator) { |
| /* detach the port from its former aggregator */ |
| temp_aggregator = port->aggregator; |
| for (curr_port = temp_aggregator->lag_ports; curr_port; |
| last_port = curr_port, |
| curr_port = curr_port->next_port_in_aggregator) { |
| if (curr_port == port) { |
| temp_aggregator->num_of_ports--; |
| /* if it is the first port attached to the |
| * aggregator |
| */ |
| if (!last_port) { |
| temp_aggregator->lag_ports = |
| port->next_port_in_aggregator; |
| } else { |
| /* not the first port attached to the |
| * aggregator |
| */ |
| last_port->next_port_in_aggregator = |
| port->next_port_in_aggregator; |
| } |
| |
| /* clear the port's relations to this |
| * aggregator |
| */ |
| port->aggregator = NULL; |
| port->next_port_in_aggregator = NULL; |
| port->actor_port_aggregator_identifier = 0; |
| |
| netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
| port->actor_port_number, |
| temp_aggregator->aggregator_identifier); |
| /* if the aggregator is empty, clear its |
| * parameters, and set it ready to be attached |
| */ |
| if (!temp_aggregator->lag_ports) |
| ad_clear_agg(temp_aggregator); |
| break; |
| } |
| } |
| if (!curr_port) { |
| /* meaning: the port was related to an aggregator |
| * but was not on the aggregator port list |
| */ |
| net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
| port->slave->bond->dev->name, |
| port->actor_port_number, |
| port->slave->dev->name, |
| port->aggregator->aggregator_identifier); |
| } |
| } |
| /* search on all aggregators for a suitable aggregator for this port */ |
| bond_for_each_slave(bond, slave, iter) { |
| aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
| |
| /* keep a free aggregator for later use(if needed) */ |
| if (!aggregator->lag_ports) { |
| if (!free_aggregator) |
| free_aggregator = aggregator; |
| continue; |
| } |
| /* check if current aggregator suits us */ |
| if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ |
| MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && |
| (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
| (aggregator->partner_oper_aggregator_key == port->partner_oper.key) |
| ) && |
| ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
| !aggregator->is_individual) /* but is not individual OR */ |
| ) |
| ) { |
| /* attach to the founded aggregator */ |
| port->aggregator = aggregator; |
| port->actor_port_aggregator_identifier = |
| port->aggregator->aggregator_identifier; |
| port->next_port_in_aggregator = aggregator->lag_ports; |
| port->aggregator->num_of_ports++; |
| aggregator->lag_ports = port; |
| netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
| port->actor_port_number, |
| port->aggregator->aggregator_identifier); |
| |
| /* mark this port as selected */ |
| port->sm_vars |= AD_PORT_SELECTED; |
| found = 1; |
| break; |
| } |
| } |
| |
| /* the port couldn't find an aggregator - attach it to a new |
| * aggregator |
| */ |
| if (!found) { |
| if (free_aggregator) { |
| /* assign port a new aggregator */ |
| port->aggregator = free_aggregator; |
| port->actor_port_aggregator_identifier = |
| port->aggregator->aggregator_identifier; |
| |
| /* update the new aggregator's parameters |
| * if port was responsed from the end-user |
| */ |
| if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) |
| /* if port is full duplex */ |
| port->aggregator->is_individual = false; |
| else |
| port->aggregator->is_individual = true; |
| |
| port->aggregator->actor_admin_aggregator_key = |
| port->actor_admin_port_key; |
| port->aggregator->actor_oper_aggregator_key = |
| port->actor_oper_port_key; |
| port->aggregator->partner_system = |
| port->partner_oper.system; |
| port->aggregator->partner_system_priority = |
| port->partner_oper.system_priority; |
| port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
| port->aggregator->receive_state = 1; |
| port->aggregator->transmit_state = 1; |
| port->aggregator->lag_ports = port; |
| port->aggregator->num_of_ports++; |
| |
| /* mark this port as selected */ |
| port->sm_vars |= AD_PORT_SELECTED; |
| |
| netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
| port->actor_port_number, |
| port->aggregator->aggregator_identifier); |
| } else { |
| netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
| port->actor_port_number, port->slave->dev->name); |
| } |
| } |
| /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
| * in all aggregator's ports, else set ready=FALSE in all |
| * aggregator's ports |
| */ |
| __set_agg_ports_ready(port->aggregator, |
| __agg_ports_are_ready(port->aggregator)); |
| |
| aggregator = __get_first_agg(port); |
| ad_agg_selection_logic(aggregator, update_slave_arr); |
| |
| if (!port->aggregator->is_active) |
| port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
| } |
| |
| /* Decide if "agg" is a better choice for the new active aggregator that |
| * the current best, according to the ad_select policy. |
| */ |
| static struct aggregator *ad_agg_selection_test(struct aggregator *best, |
| struct aggregator *curr) |
| { |
| /* 0. If no best, select current. |
| * |
| * 1. If the current agg is not individual, and the best is |
| * individual, select current. |
| * |
| * 2. If current agg is individual and the best is not, keep best. |
| * |
| * 3. Therefore, current and best are both individual or both not |
| * individual, so: |
| * |
| * 3a. If current agg partner replied, and best agg partner did not, |
| * select current. |
| * |
| * 3b. If current agg partner did not reply and best agg partner |
| * did reply, keep best. |
| * |
| * 4. Therefore, current and best both have partner replies or |
| * both do not, so perform selection policy: |
| * |
| * BOND_AD_COUNT: Select by count of ports. If count is equal, |
| * select by bandwidth. |
| * |
| * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. |
| */ |
| if (!best) |
| return curr; |
| |
| if (!curr->is_individual && best->is_individual) |
| return curr; |
| |
| if (curr->is_individual && !best->is_individual) |
| return best; |
| |
| if (__agg_has_partner(curr) && !__agg_has_partner(best)) |
| return curr; |
| |
| if (!__agg_has_partner(curr) && __agg_has_partner(best)) |
| return best; |
| |
| switch (__get_agg_selection_mode(curr->lag_ports)) { |
| case BOND_AD_COUNT: |
| if (curr->num_of_ports > best->num_of_ports) |
| return curr; |
| |
| if (curr->num_of_ports < best->num_of_ports) |
| return best; |
| |
| /*FALLTHROUGH*/ |
| case BOND_AD_STABLE: |
| case BOND_AD_BANDWIDTH: |
| if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) |
| return curr; |
| |
| break; |
| |
| default: |
| net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
| curr->slave->bond->dev->name, |
| __get_agg_selection_mode(curr->lag_ports)); |
| break; |
| } |
| |
| return best; |
| } |
| |
| static int agg_device_up(const struct aggregator *agg) |
| { |
| struct port *port = agg->lag_ports; |
| |
| if (!port) |
| return 0; |
| |
| return netif_running(port->slave->dev) && |
| netif_carrier_ok(port->slave->dev); |
| } |
| |
| /** |
| * ad_agg_selection_logic - select an aggregation group for a team |
| * @aggregator: the aggregator we're looking at |
| * @update_slave_arr: Does slave array need update? |
| * |
| * It is assumed that only one aggregator may be selected for a team. |
| * |
| * The logic of this function is to select the aggregator according to |
| * the ad_select policy: |
| * |
| * BOND_AD_STABLE: select the aggregator with the most ports attached to |
| * it, and to reselect the active aggregator only if the previous |
| * aggregator has no more ports related to it. |
| * |
| * BOND_AD_BANDWIDTH: select the aggregator with the highest total |
| * bandwidth, and reselect whenever a link state change takes place or the |
| * set of slaves in the bond changes. |
| * |
| * BOND_AD_COUNT: select the aggregator with largest number of ports |
| * (slaves), and reselect whenever a link state change takes place or the |
| * set of slaves in the bond changes. |
| * |
| * FIXME: this function MUST be called with the first agg in the bond, or |
| * __get_active_agg() won't work correctly. This function should be better |
| * called with the bond itself, and retrieve the first agg from it. |
| */ |
| static void ad_agg_selection_logic(struct aggregator *agg, |
| bool *update_slave_arr) |
| { |
| struct aggregator *best, *active, *origin; |
| struct bonding *bond = agg->slave->bond; |
| struct list_head *iter; |
| struct slave *slave; |
| struct port *port; |
| |
| rcu_read_lock(); |
| origin = agg; |
| active = __get_active_agg(agg); |
| best = (active && agg_device_up(active)) ? active : NULL; |
| |
| bond_for_each_slave_rcu(bond, slave, iter) { |
| agg = &(SLAVE_AD_INFO(slave)->aggregator); |
| |
| agg->is_active = 0; |
| |
| if (agg->num_of_ports && agg_device_up(agg)) |
| best = ad_agg_selection_test(best, agg); |
| } |
| |
| if (best && |
| __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { |
| /* For the STABLE policy, don't replace the old active |
| * aggregator if it's still active (it has an answering |
| * partner) or if both the best and active don't have an |
| * answering partner. |
| */ |
| if (active && active->lag_ports && |
| active->lag_ports->is_enabled && |
| (__agg_has_partner(active) || |
| (!__agg_has_partner(active) && |
| !__agg_has_partner(best)))) { |
| if (!(!active->actor_oper_aggregator_key && |
| best->actor_oper_aggregator_key)) { |
| best = NULL; |
| active->is_active = 1; |
| } |
| } |
| } |
| |
| if (best && (best == active)) { |
| best = NULL; |
| active->is_active = 1; |
| } |
| |
| /* if there is new best aggregator, activate it */ |
| if (best) { |
| netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
| best->aggregator_identifier, best->num_of_ports, |
| best->actor_oper_aggregator_key, |
| best->partner_oper_aggregator_key, |
| best->is_individual, best->is_active); |
| netdev_dbg(bond->dev, "best ports %p slave %p %s\n", |
| best->lag_ports, best->slave, |
| best->slave ? best->slave->dev->name : "NULL"); |
| |
| bond_for_each_slave_rcu(bond, slave, iter) { |
| agg = &(SLAVE_AD_INFO(slave)->aggregator); |
| |
| netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
| agg->aggregator_identifier, agg->num_of_ports, |
| agg->actor_oper_aggregator_key, |
| agg->partner_oper_aggregator_key, |
| agg->is_individual, agg->is_active); |
| } |
| |
| /* check if any partner replys */ |
| if (best->is_individual) { |
| net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
| best->slave ? |
| best->slave->bond->dev->name : "NULL"); |
| } |
| |
| best->is_active = 1; |
| netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
| best->aggregator_identifier); |
| netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
| best->aggregator_identifier, best->num_of_ports, |
| best->actor_oper_aggregator_key, |
| best->partner_oper_aggregator_key, |
| best->is_individual, best->is_active); |
| |
| /* disable the ports that were related to the former |
| * active_aggregator |
| */ |
| if (active) { |
| for (port = active->lag_ports; port; |
| port = port->next_port_in_aggregator) { |
| __disable_port(port); |
| } |
| } |
| /* Slave array needs update. */ |
| *update_slave_arr = true; |
| } |
| |
| /* if the selected aggregator is of join individuals |
| * (partner_system is NULL), enable their ports |
| */ |
| active = __get_active_agg(origin); |
| |
| if (active) { |
| if (!__agg_has_partner(active)) { |
| for (port = active->lag_ports; port; |
| port = port->next_port_in_aggregator) { |
| __enable_port(port); |
| } |
| } |
| } |
| |
| rcu_read_unlock(); |
| |
| bond_3ad_set_carrier(bond); |
| } |
| |
| /** |
| * ad_clear_agg - clear a given aggregator's parameters |
| * @aggregator: the aggregator we're looking at |
| */ |
| static void ad_clear_agg(struct aggregator *aggregator) |
| { |
| if (aggregator) { |
| aggregator->is_individual = false; |
| aggregator->actor_admin_aggregator_key = 0; |
| aggregator->actor_oper_aggregator_key = 0; |
| aggregator->partner_system = null_mac_addr; |
| aggregator->partner_system_priority = 0; |
| aggregator->partner_oper_aggregator_key = 0; |
| aggregator->receive_state = 0; |
| aggregator->transmit_state = 0; |
| aggregator->lag_ports = NULL; |
| aggregator->is_active = 0; |
| aggregator->num_of_ports = 0; |
| pr_debug("LAG %d was cleared\n", |
| aggregator->aggregator_identifier); |
| } |
| } |
| |
| /** |
| * ad_initialize_agg - initialize a given aggregator's parameters |
| * @aggregator: the aggregator we're looking at |
| */ |
| static void ad_initialize_agg(struct aggregator *aggregator) |
| { |
| if (aggregator) { |
| ad_clear_agg(aggregator); |
| |
| aggregator->aggregator_mac_address = null_mac_addr; |
| aggregator->aggregator_identifier = 0; |
| aggregator->slave = NULL; |
| } |
| } |
| |
| /** |
| * ad_initialize_port - initialize a given port's parameters |
| * @aggregator: the aggregator we're looking at |
| * @lacp_fast: boolean. whether fast periodic should be used |
| */ |
| static void ad_initialize_port(struct port *port, int lacp_fast) |
| { |
| static const struct port_params tmpl = { |
| .system_priority = 0xffff, |
| .key = 1, |
| .port_number = 1, |
| .port_priority = 0xff, |
| .port_state = 1, |
| }; |
| static const struct lacpdu lacpdu = { |
| .subtype = 0x01, |
| .version_number = 0x01, |
| .tlv_type_actor_info = 0x01, |
| .actor_information_length = 0x14, |
| .tlv_type_partner_info = 0x02, |
| .partner_information_length = 0x14, |
| .tlv_type_collector_info = 0x03, |
| .collector_information_length = 0x10, |
| .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), |
| }; |
| |
| if (port) { |
| port->actor_port_priority = 0xff; |
| port->actor_port_aggregator_identifier = 0; |
| port->ntt = false; |
| port->actor_admin_port_state = AD_STATE_AGGREGATION | |
| AD_STATE_LACP_ACTIVITY; |
| port->actor_oper_port_state = AD_STATE_AGGREGATION | |
| AD_STATE_LACP_ACTIVITY; |
| |
| if (lacp_fast) |
| port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
| |
| memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
| memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); |
| |
| port->is_enabled = true; |
| /* private parameters */ |
| port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; |
| port->sm_rx_state = 0; |
| port->sm_rx_timer_counter = 0; |
| port->sm_periodic_state = 0; |
| port->sm_periodic_timer_counter = 0; |
| port->sm_mux_state = 0; |
| port->sm_mux_timer_counter = 0; |
| port->sm_tx_state = 0; |
| port->aggregator = NULL; |
| port->next_port_in_aggregator = NULL; |
| port->transaction_id = 0; |
| |
| port->sm_churn_actor_timer_counter = 0; |
| port->sm_churn_actor_state = 0; |
| port->churn_actor_count = 0; |
| port->sm_churn_partner_timer_counter = 0; |
| port->sm_churn_partner_state = 0; |
| port->churn_partner_count = 0; |
| |
| memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
| } |
| } |
| |
| /** |
| * ad_enable_collecting_distributing - enable a port's transmit/receive |
| * @port: the port we're looking at |
| * @update_slave_arr: Does slave array need update? |
| * |
| * Enable @port if it's in an active aggregator |
| */ |
| static void ad_enable_collecting_distributing(struct port *port, |
| bool *update_slave_arr) |
| { |
| if (port->aggregator->is_active) { |
| pr_debug("Enabling port %d(LAG %d)\n", |
| port->actor_port_number, |
| port->aggregator->aggregator_identifier); |
| __enable_port(port); |
| /* Slave array needs update */ |
| *update_slave_arr = true; |
| } |
| } |
| |
| /** |
| * ad_disable_collecting_distributing - disable a port's transmit/receive |
| * @port: the port we're looking at |
| * @update_slave_arr: Does slave array need update? |
| */ |
| static void ad_disable_collecting_distributing(struct port *port, |
| bool *update_slave_arr) |
| { |
| if (port->aggregator && |
| !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), |
| &(null_mac_addr))) { |
| pr_debug("Disabling port %d(LAG %d)\n", |
| port->actor_port_number, |
| port->aggregator->aggregator_identifier); |
| __disable_port(port); |
| /* Slave array needs an update */ |
| *update_slave_arr = true; |
| } |
| } |
| |
| /** |
| * ad_marker_info_received - handle receive of a Marker information frame |
| * @marker_info: Marker info received |
| * @port: the port we're looking at |
| */ |
| static void ad_marker_info_received(struct bond_marker *marker_info, |
| struct port *port) |
| { |
| struct bond_marker marker; |
| |
| /* copy the received marker data to the response marker */ |
| memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
| /* change the marker subtype to marker response */ |
| marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
| |
| /* send the marker response */ |
| if (ad_marker_send(port, &marker) >= 0) { |
| pr_debug("Sent Marker Response on port %d\n", |
| port->actor_port_number); |
| } |
| } |
| |
| /** |
| * ad_marker_response_received - handle receive of a marker response frame |
| * @marker: marker PDU received |
| * @port: the port we're looking at |
| * |
| * This function does nothing since we decided not to implement send and handle |
| * response for marker PDU's, in this stage, but only to respond to marker |
| * information. |
| */ |
| static void ad_marker_response_received(struct bond_marker *marker, |
| struct port *port) |
| { |
| marker = NULL; |
| port = NULL; |
| /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ |
| } |
| |
| /* ========= AD exported functions to the main bonding code ========= */ |
| |
| /* Check aggregators status in team every T seconds */ |
| #define AD_AGGREGATOR_SELECTION_TIMER 8 |
| |
| /** |
| * bond_3ad_initiate_agg_selection - initate aggregator selection |
| * @bond: bonding struct |
| * |
| * Set the aggregation selection timer, to initiate an agg selection in |
| * the very near future. Called during first initialization, and during |
| * any down to up transitions of the bond. |
| */ |
| void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) |
| { |
| BOND_AD_INFO(bond).agg_select_timer = timeout; |
| } |
| |
| /** |
| * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures |
| * @bond: bonding struct to work on |
| * @tick_resolution: tick duration (millisecond resolution) |
| * |
| * Can be called only after the mac address of the bond is set. |
| */ |
| void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
| { |
| /* check that the bond is not initialized yet */ |
| if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), |
| bond->dev->dev_addr)) { |
| |
| BOND_AD_INFO(bond).aggregator_identifier = 0; |
| |
| BOND_AD_INFO(bond).system.sys_priority = |
| bond->params.ad_actor_sys_prio; |
| if (is_zero_ether_addr(bond->params.ad_actor_system)) |
| BOND_AD_INFO(bond).system.sys_mac_addr = |
| *((struct mac_addr *)bond->dev->dev_addr); |
| else |
| BOND_AD_INFO(bond).system.sys_mac_addr = |
| *((struct mac_addr *)bond->params.ad_actor_system); |
| |
| /* initialize how many times this module is called in one |
| * second (should be about every 100ms) |
| */ |
| ad_ticks_per_sec = tick_resolution; |
| |
| bond_3ad_initiate_agg_selection(bond, |
| AD_AGGREGATOR_SELECTION_TIMER * |
| ad_ticks_per_sec); |
| } |
| } |
| |
| /** |
| * bond_3ad_bind_slave - initialize a slave's port |
| * @slave: slave struct to work on |
| * |
| * Returns: 0 on success |
| * < 0 on error |
| */ |
| void bond_3ad_bind_slave(struct slave *slave) |
| { |
| struct bonding *bond = bond_get_bond_by_slave(slave); |
| struct port *port; |
| struct aggregator *aggregator; |
| |
| /* check that the slave has not been initialized yet. */ |
| if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
| |
| /* port initialization */ |
| port = &(SLAVE_AD_INFO(slave)->port); |
| |
| ad_initialize_port(port, bond->params.lacp_fast); |
| |
| port->slave = slave; |
| port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
| /* key is determined according to the link speed, duplex and |
| * user key |
| */ |
| port->actor_admin_port_key = bond->params.ad_user_port_key << 6; |
| port->actor_admin_port_key |= __get_duplex(port); |
| port->actor_admin_port_key |= (__get_link_speed(port) << 1); |
| port->actor_oper_port_key = port->actor_admin_port_key; |
| /* if the port is not full duplex, then the port should be not |
| * lacp Enabled |
| */ |
| if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) |
| port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
| /* actor system is the bond's system */ |
| port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
| port->actor_system_priority = |
| BOND_AD_INFO(bond).system.sys_priority; |
| /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
| * lacpdu's are sent in one second) |
| */ |
| port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
| |
| __disable_port(port); |
| |
| /* aggregator initialization */ |
| aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
| |
| ad_initialize_agg(aggregator); |
| |
| aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); |
| aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
| aggregator->slave = slave; |
| aggregator->is_active = 0; |
| aggregator->num_of_ports = 0; |
| } |
| } |
| |
| /** |
| * bond_3ad_unbind_slave - deinitialize a slave's port |
| * @slave: slave struct to work on |
| * |
| * Search for the aggregator that is related to this port, remove the |
| * aggregator and assign another aggregator for other port related to it |
| * (if any), and remove the port. |
| */ |
| void bond_3ad_unbind_slave(struct slave *slave) |
| { |
| struct port *port, *prev_port, *temp_port; |
| struct aggregator *aggregator, *new_aggregator, *temp_aggregator; |
| int select_new_active_agg = 0; |
| struct bonding *bond = slave->bond; |
| struct slave *slave_iter; |
| struct list_head *iter; |
| bool dummy_slave_update; /* Ignore this value as caller updates array */ |
| |
| /* Sync against bond_3ad_state_machine_handler() */ |
| spin_lock_bh(&bond->mode_lock); |
| aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
| port = &(SLAVE_AD_INFO(slave)->port); |
| |
| /* if slave is null, the whole port is not initialized */ |
| if (!port->slave) { |
| netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
| slave->dev->name); |
| goto out; |
| } |
| |
| netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
| aggregator->aggregator_identifier); |
| |
| /* Tell the partner that this port is not suitable for aggregation */ |
| port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; |
| __update_lacpdu_from_port(port); |
| ad_lacpdu_send(port); |
| |
| /* check if this aggregator is occupied */ |
| if (aggregator->lag_ports) { |
| /* check if there are other ports related to this aggregator |
| * except the port related to this slave(thats ensure us that |
| * there is a reason to search for new aggregator, and that we |
| * will find one |
| */ |
| if ((aggregator->lag_ports != port) || |
| (aggregator->lag_ports->next_port_in_aggregator)) { |
| /* find new aggregator for the related port(s) */ |
| bond_for_each_slave(bond, slave_iter, iter) { |
| new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
| /* if the new aggregator is empty, or it is |
| * connected to our port only |
| */ |
| if (!new_aggregator->lag_ports || |
| ((new_aggregator->lag_ports == port) && |
| !new_aggregator->lag_ports->next_port_in_aggregator)) |
| break; |
| } |
| if (!slave_iter) |
| new_aggregator = NULL; |
| |
| /* if new aggregator found, copy the aggregator's |
| * parameters and connect the related lag_ports to the |
| * new aggregator |
| */ |
| if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
| netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
| aggregator->aggregator_identifier, |
| new_aggregator->aggregator_identifier); |
| |
| if ((new_aggregator->lag_ports == port) && |
| new_aggregator->is_active) { |
| netdev_info(bond->dev, "Removing an active aggregator\n"); |
| select_new_active_agg = 1; |
| } |
| |
| new_aggregator->is_individual = aggregator->is_individual; |
| new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; |
| new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; |
| new_aggregator->partner_system = aggregator->partner_system; |
| new_aggregator->partner_system_priority = aggregator->partner_system_priority; |
| new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; |
| new_aggregator->receive_state = aggregator->receive_state; |
| new_aggregator->transmit_state = aggregator->transmit_state; |
| new_aggregator->lag_ports = aggregator->lag_ports; |
| new_aggregator->is_active = aggregator->is_active; |
| new_aggregator->num_of_ports = aggregator->num_of_ports; |
| |
| /* update the information that is written on |
| * the ports about the aggregator |
| */ |
| for (temp_port = aggregator->lag_ports; temp_port; |
| temp_port = temp_port->next_port_in_aggregator) { |
| temp_port->aggregator = new_aggregator; |
| temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
| } |
| |
| ad_clear_agg(aggregator); |
| |
| if (select_new_active_agg) |
| ad_agg_selection_logic(__get_first_agg(port), |
| &dummy_slave_update); |
| } else { |
| netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
| } |
| } else { |
| /* in case that the only port related to this |
| * aggregator is the one we want to remove |
| */ |
| select_new_active_agg = aggregator->is_active; |
| ad_clear_agg(aggregator); |
| if (select_new_active_agg) { |
| netdev_info(bond->dev, "Removing an active aggregator\n"); |
| /* select new active aggregator */ |
| temp_aggregator = __get_first_agg(port); |
| if (temp_aggregator) |
| ad_agg_selection_logic(temp_aggregator, |
| &dummy_slave_update); |
| } |
| } |
| } |
| |
| netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
| |
| /* find the aggregator that this port is connected to */ |
| bond_for_each_slave(bond, slave_iter, iter) { |
| temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
| prev_port = NULL; |
| /* search the port in the aggregator's related ports */ |
| for (temp_port = temp_aggregator->lag_ports; temp_port; |
| prev_port = temp_port, |
| temp_port = temp_port->next_port_in_aggregator) { |
| if (temp_port == port) { |
| /* the aggregator found - detach the port from |
| * this aggregator |
| */ |
| if (prev_port) |
| prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
| else |
| temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
| temp_aggregator->num_of_ports--; |
| if (temp_aggregator->num_of_ports == 0) { |
| select_new_active_agg = temp_aggregator->is_active; |
| ad_clear_agg(temp_aggregator); |
| if (select_new_active_agg) { |
| netdev_info(bond->dev, "Removing an active aggregator\n"); |
| /* select new active aggregator */ |
| ad_agg_selection_logic(__get_first_agg(port), |
| &dummy_slave_update); |
| } |
| } |
| break; |
| } |
| } |
| } |
| port->slave = NULL; |
| |
| out: |
| spin_unlock_bh(&bond->mode_lock); |
| } |
| |
| /** |
| * bond_3ad_state_machine_handler - handle state machines timeout |
| * @bond: bonding struct to work on |
| * |
| * The state machine handling concept in this module is to check every tick |
| * which state machine should operate any function. The execution order is |
| * round robin, so when we have an interaction between state machines, the |
| * reply of one to each other might be delayed until next tick. |
| * |
| * This function also complete the initialization when the agg_select_timer |
| * times out, and it selects an aggregator for the ports that are yet not |
| * related to any aggregator, and selects the active aggregator for a bond. |
| */ |
| void bond_3ad_state_machine_handler(struct work_struct *work) |
| { |
| struct bonding *bond = container_of(work, struct bonding, |
| ad_work.work); |
| struct aggregator *aggregator; |
| struct list_head *iter; |
| struct slave *slave; |
| struct port *port; |
| bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
| bool update_slave_arr = false; |
| |
| /* Lock to protect data accessed by all (e.g., port->sm_vars) and |
| * against running with bond_3ad_unbind_slave. ad_rx_machine may run |
| * concurrently due to incoming LACPDU as well. |
| */ |
| spin_lock_bh(&bond->mode_lock); |
| rcu_read_lock(); |
| |
| /* check if there are any slaves */ |
| if (!bond_has_slaves(bond)) |
| goto re_arm; |
| |
| /* check if agg_select_timer timer after initialize is timed out */ |
| if (BOND_AD_INFO(bond).agg_select_timer && |
| !(--BOND_AD_INFO(bond).agg_select_timer)) { |
| slave = bond_first_slave_rcu(bond); |
| port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
| |
| /* select the active aggregator for the bond */ |
| if (port) { |
| if (!port->slave) { |
| net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
| bond->dev->name); |
| goto re_arm; |
| } |
| |
| aggregator = __get_first_agg(port); |
| ad_agg_selection_logic(aggregator, &update_slave_arr); |
| } |
| bond_3ad_set_carrier(bond); |
| } |
| |
| /* for each port run the state machines */ |
| bond_for_each_slave_rcu(bond, slave, iter) { |
| port = &(SLAVE_AD_INFO(slave)->port); |
| if (!port->slave) { |
| net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
| bond->dev->name); |
| goto re_arm; |
| } |
| |
| ad_rx_machine(NULL, port); |
| ad_periodic_machine(port); |
| ad_port_selection_logic(port, &update_slave_arr); |
| ad_mux_machine(port, &update_slave_arr); |
| ad_tx_machine(port); |
| ad_churn_machine(port); |
| |
| /* turn off the BEGIN bit, since we already handled it */ |
| if (port->sm_vars & AD_PORT_BEGIN) |
| port->sm_vars &= ~AD_PORT_BEGIN; |
| } |
| |
| re_arm: |
| bond_for_each_slave_rcu(bond, slave, iter) { |
| if (slave->should_notify) { |
| should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; |
| break; |
| } |
| } |
| rcu_read_unlock(); |
| spin_unlock_bh(&bond->mode_lock); |
| |
| if (update_slave_arr) |
| bond_slave_arr_work_rearm(bond, 0); |
| |
| if (should_notify_rtnl && rtnl_trylock()) { |
| bond_slave_state_notify(bond); |
| rtnl_unlock(); |
| } |
| queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
| } |
| |
| /** |
| * bond_3ad_rx_indication - handle a received frame |
| * @lacpdu: received lacpdu |
| * @slave: slave struct to work on |
| * @length: length of the data received |
| * |
| * It is assumed that frames that were sent on this NIC don't returned as new |
| * received frames (loopback). Since only the payload is given to this |
| * function, it check for loopback. |
| */ |
| static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
| u16 length) |
| { |
| struct port *port; |
| int ret = RX_HANDLER_ANOTHER; |
| |
| if (length >= sizeof(struct lacpdu)) { |
| |
| port = &(SLAVE_AD_INFO(slave)->port); |
| |
| if (!port->slave) { |
| net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
| slave->dev->name, slave->bond->dev->name); |
| return ret; |
| } |
| |
| switch (lacpdu->subtype) { |
| case AD_TYPE_LACPDU: |
| ret = RX_HANDLER_CONSUMED; |
| netdev_dbg(slave->bond->dev, |
| "Received LACPDU on port %d slave %s\n", |
| port->actor_port_number, |
| slave->dev->name); |
| /* Protect against concurrent state machines */ |
| spin_lock(&slave->bond->mode_lock); |
| ad_rx_machine(lacpdu, port); |
| spin_unlock(&slave->bond->mode_lock); |
| break; |
| |
| case AD_TYPE_MARKER: |
| ret = RX_HANDLER_CONSUMED; |
| /* No need to convert fields to Little Endian since we |
| * don't use the marker's fields. |
| */ |
| |
| switch (((struct bond_marker *)lacpdu)->tlv_type) { |
| case AD_MARKER_INFORMATION_SUBTYPE: |
| netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
| port->actor_port_number); |
| ad_marker_info_received((struct bond_marker *)lacpdu, port); |
| break; |
| |
| case AD_MARKER_RESPONSE_SUBTYPE: |
| netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
| port->actor_port_number); |
| ad_marker_response_received((struct bond_marker *)lacpdu, port); |
| break; |
| |
| default: |
| netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
| port->actor_port_number); |
| } |
| } |
| } |
| return ret; |
| } |
| |
| /** |
| * bond_3ad_adapter_speed_changed - handle a slave's speed change indication |
| * @slave: slave struct to work on |
| * |
| * Handle reselection of aggregator (if needed) for this port. |
| */ |
| void bond_3ad_adapter_speed_changed(struct slave *slave) |
| { |
| struct port *port; |
| |
| port = &(SLAVE_AD_INFO(slave)->port); |
| |
| /* if slave is null, the whole port is not initialized */ |
| if (!port->slave) { |
| netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", |
| slave->dev->name); |
| return; |
| } |
| |
| spin_lock_bh(&slave->bond->mode_lock); |
| |
| port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS; |
| port->actor_admin_port_key |= __get_link_speed(port) << 1; |
| port->actor_oper_port_key = port->actor_admin_port_key; |
| netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); |
| /* there is no need to reselect a new aggregator, just signal the |
| * state machines to reinitialize |
| */ |
| port->sm_vars |= AD_PORT_BEGIN; |
| |
| spin_unlock_bh(&slave->bond->mode_lock); |
| } |
| |
| /** |
| * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication |
| * @slave: slave struct to work on |
| * |
| * Handle reselection of aggregator (if needed) for this port. |
| */ |
| void bond_3ad_adapter_duplex_changed(struct slave *slave) |
| { |
| struct port *port; |
| |
| port = &(SLAVE_AD_INFO(slave)->port); |
| |
| /* if slave is null, the whole port is not initialized */ |
| if (!port->slave) { |
| netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", |
| slave->dev->name); |
| return; |
| } |
| |
| spin_lock_bh(&slave->bond->mode_lock); |
| |
| port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; |
| port->actor_admin_port_key |= __get_duplex(port); |
| port->actor_oper_port_key = port->actor_admin_port_key; |
| netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n", |
| port->actor_port_number, slave->dev->name); |
| if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) |
| port->sm_vars |= AD_PORT_LACP_ENABLED; |
| /* there is no need to reselect a new aggregator, just signal the |
| * state machines to reinitialize |
| */ |
| port->sm_vars |= AD_PORT_BEGIN; |
| |
| spin_unlock_bh(&slave->bond->mode_lock); |
| } |
| |
| /** |
| * bond_3ad_handle_link_change - handle a slave's link status change indication |
| * @slave: slave struct to work on |
| * @status: whether the link is now up or down |
| * |
| * Handle reselection of aggregator (if needed) for this port. |
| */ |
| void bond_3ad_handle_link_change(struct slave *slave, char link) |
| { |
| struct port *port; |
| |
| port = &(SLAVE_AD_INFO(slave)->port); |
| |
| /* if slave is null, the whole port is not initialized */ |
| if (!port->slave) { |
| netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
| slave->dev->name); |
| return; |
| } |
| |
| spin_lock_bh(&slave->bond->mode_lock); |
| /* on link down we are zeroing duplex and speed since |
| * some of the adaptors(ce1000.lan) report full duplex/speed |
| * instead of N/A(duplex) / 0(speed). |
| * |
| * on link up we are forcing recheck on the duplex and speed since |
| * some of he adaptors(ce1000.lan) report. |
| */ |
| port->actor_admin_port_key &= ~(AD_DUPLEX_KEY_MASKS|AD_SPEED_KEY_MASKS); |
| if (link == BOND_LINK_UP) { |
| port->is_enabled = true; |
| port->actor_admin_port_key |= |
| (__get_link_speed(port) << 1) | __get_duplex(port); |
| if (port->actor_admin_port_key & AD_DUPLEX_KEY_MASKS) |
| port->sm_vars |= AD_PORT_LACP_ENABLED; |
| } else { |
| /* link has failed */ |
| port->is_enabled = false; |
| port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
| } |
| port->actor_oper_port_key = port->actor_admin_port_key; |
| netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
| port->actor_port_number, |
| link == BOND_LINK_UP ? "UP" : "DOWN"); |
| /* there is no need to reselect a new aggregator, just signal the |
| * state machines to reinitialize |
| */ |
| port->sm_vars |= AD_PORT_BEGIN; |
| |
| spin_unlock_bh(&slave->bond->mode_lock); |
| |
| /* RTNL is held and mode_lock is released so it's safe |
| * to update slave_array here. |
| */ |
| bond_update_slave_arr(slave->bond, NULL); |
| } |
| |
| /** |
| * bond_3ad_set_carrier - set link state for bonding master |
| * @bond - bonding structure |
| * |
| * if we have an active aggregator, we're up, if not, we're down. |
| * Presumes that we cannot have an active aggregator if there are |
| * no slaves with link up. |
| * |
| * This behavior complies with IEEE 802.3 section 43.3.9. |
| * |
| * Called by bond_set_carrier(). Return zero if carrier state does not |
| * change, nonzero if it does. |
| */ |
| int bond_3ad_set_carrier(struct bonding *bond) |
| { |
| struct aggregator *active; |
| struct slave *first_slave; |
| int ret = 1; |
| |
| rcu_read_lock(); |
| first_slave = bond_first_slave_rcu(bond); |
| if (!first_slave) { |
| ret = 0; |
| goto out; |
| } |
| active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
| if (active) { |
| /* are enough slaves available to consider link up? */ |
| if (active->num_of_ports < bond->params.min_links) { |
| if (netif_carrier_ok(bond->dev)) { |
| netif_carrier_off(bond->dev); |
| goto out; |
| } |
| } else if (!netif_carrier_ok(bond->dev)) { |
| netif_carrier_on(bond->dev); |
| goto out; |
| } |
| } else if (netif_carrier_ok(bond->dev)) { |
| netif_carrier_off(bond->dev); |
| } |
| out: |
| rcu_read_unlock(); |
| return ret; |
| } |
| |
| /** |
| * __bond_3ad_get_active_agg_info - get information of the active aggregator |
| * @bond: bonding struct to work on |
| * @ad_info: ad_info struct to fill with the bond's info |
| * |
| * Returns: 0 on success |
| * < 0 on error |
| */ |
| int __bond_3ad_get_active_agg_info(struct bonding *bond, |
| struct ad_info *ad_info) |
| { |
| struct aggregator *aggregator = NULL; |
| struct list_head *iter; |
| struct slave *slave; |
| struct port *port; |
| |
| bond_for_each_slave_rcu(bond, slave, iter) { |
| port = &(SLAVE_AD_INFO(slave)->port); |
| if (port->aggregator && port->aggregator->is_active) { |
| aggregator = port->aggregator; |
| break; |
| } |
| } |
| |
| if (!aggregator) |
| return -1; |
| |
| ad_info->aggregator_id = aggregator->aggregator_identifier; |
| ad_info->ports = aggregator->num_of_ports; |
| ad_info->actor_key = aggregator->actor_oper_aggregator_key; |
| ad_info->partner_key = aggregator->partner_oper_aggregator_key; |
| ether_addr_copy(ad_info->partner_system, |
| aggregator->partner_system.mac_addr_value); |
| return 0; |
| } |
| |
| int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
| { |
| int ret; |
| |
| rcu_read_lock(); |
| ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
| rcu_read_unlock(); |
| |
| return ret; |
| } |
| |
| int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
| struct slave *slave) |
| { |
| struct lacpdu *lacpdu, _lacpdu; |
| |
| if (skb->protocol != PKT_TYPE_LACPDU) |
| return RX_HANDLER_ANOTHER; |
| |
| if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) |
| return RX_HANDLER_ANOTHER; |
| |
| lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
| if (!lacpdu) |
| return RX_HANDLER_ANOTHER; |
| |
| return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
| } |
| |
| /** |
| * bond_3ad_update_lacp_rate - change the lacp rate |
| * @bond - bonding struct |
| * |
| * When modify lacp_rate parameter via sysfs, |
| * update actor_oper_port_state of each port. |
| * |
| * Hold bond->mode_lock, |
| * so we can modify port->actor_oper_port_state, |
| * no matter bond is up or down. |
| */ |
| void bond_3ad_update_lacp_rate(struct bonding *bond) |
| { |
| struct port *port = NULL; |
| struct list_head *iter; |
| struct slave *slave; |
| int lacp_fast; |
| |
| lacp_fast = bond->params.lacp_fast; |
| spin_lock_bh(&bond->mode_lock); |
| bond_for_each_slave(bond, slave, iter) { |
| port = &(SLAVE_AD_INFO(slave)->port); |
| if (lacp_fast) |
| port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
| else |
| port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; |
| } |
| spin_unlock_bh(&bond->mode_lock); |
| } |