| /* |
| * 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. |
| * |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #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 "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 |
| #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
| //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; |
| |
| 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); |
| 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_enable_collecting_distributing(struct port *port); |
| static void ad_disable_collecting_distributing(struct port *port); |
| 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_port - get the first port in the bond |
| * @bond: the bond we're looking at |
| * |
| * Return the port of the first slave in @bond, or %NULL if it can't be found. |
| */ |
| static inline struct port *__get_first_port(struct bonding *bond) |
| { |
| struct slave *first_slave = bond_first_slave(bond); |
| |
| return first_slave ? &(SLAVE_AD_INFO(first_slave).port) : NULL; |
| } |
| |
| /** |
| * __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, *slave_next; |
| |
| // If there's no bond for this port, or this is the last slave |
| if (bond == NULL) |
| return NULL; |
| slave_next = bond_next_slave(bond, slave); |
| if (!slave_next || bond_is_first_slave(bond, slave_next)) |
| return NULL; |
| |
| return &(SLAVE_AD_INFO(slave_next).port); |
| } |
| |
| /** |
| * __get_first_agg - get the first aggregator in the bond |
| * @bond: the bond we're looking at |
| * |
| * Return the aggregator of the first slave in @bond, or %NULL if it can't be |
| * found. |
| */ |
| static inline struct aggregator *__get_first_agg(struct port *port) |
| { |
| struct bonding *bond = __get_bond_by_port(port); |
| struct slave *first_slave; |
| |
| // If there's no bond for this port, or bond has no slaves |
| if (bond == NULL) |
| return NULL; |
| first_slave = bond_first_slave(bond); |
| |
| return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; |
| } |
| |
| /** |
| * __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, *slave_next; |
| 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) |
| return NULL; |
| slave_next = bond_next_slave(bond, slave); |
| if (!slave_next || bond_is_first_slave(bond, slave_next)) |
| return NULL; |
| |
| return &(SLAVE_AD_INFO(slave_next).aggregator); |
| } |
| |
| /* |
| * __agg_has_partner |
| * |
| * 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); |
| } |
| |
| /** |
| * __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 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_state_machine_lock - lock the port's state machines |
| * @port: the port we're looking at |
| * |
| */ |
| static inline void __get_state_machine_lock(struct port *port) |
| { |
| spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
| } |
| |
| /** |
| * __release_state_machine_lock - unlock the port's state machines |
| * @port: the port we're looking at |
| * |
| */ |
| static inline void __release_state_machine_lock(struct port *port) |
| { |
| spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_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, |
| * %AD_LINK_SPEED_BITMASK_10000MBPS |
| */ |
| 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; |
| |
| case SPEED_10000: |
| speed = AD_LINK_SPEED_BITMASK_10000MBPS; |
| break; |
| |
| default: |
| speed = 0; // unknown speed value from ethtool. shouldn't happen |
| break; |
| } |
| } |
| |
| pr_debug("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; |
| pr_debug("Port %d Received status full duplex update from adapter\n", |
| port->actor_port_number); |
| break; |
| case DUPLEX_HALF: |
| default: |
| retval = 0x0; |
| pr_debug("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 STATE machine spinlock |
| * @port: the slave of the port we're looking at |
| * |
| */ |
| static inline void __initialize_port_locks(struct slave *slave) |
| { |
| // make sure it isn't called twice |
| spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); |
| } |
| |
| //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); // 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 ================== |
| ///////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * __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 |
| if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
| (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && |
| !MAC_ADDRESS_COMPARE(&(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))) || |
| // 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; |
| } |
| } |
| |
| /** |
| * __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; |
| else |
| partner->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) |
| { |
| 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 |
| if (ntohs(lacpdu->actor_port) != partner->port_number || |
| ntohs(lacpdu->actor_port_priority) != partner->port_priority || |
| MAC_ADDRESS_COMPARE(&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)) { |
| // 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) |
| { |
| if (port) { |
| const struct port_params *admin = &port->partner_admin; |
| const struct port_params *oper = &port->partner_oper; |
| |
| // check if any parameter is different |
| if (admin->port_number != oper->port_number || |
| admin->port_priority != oper->port_priority || |
| MAC_ADDRESS_COMPARE(&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)) { |
| // update the state machine Selected variable |
| 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 |
| if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
| (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || |
| MAC_ADDRESS_COMPARE(&(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; |
| } |
| } |
| } |
| |
| /** |
| * __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 since 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; |
| |
| if (aggregator->num_of_ports) { |
| switch (__get_link_speed(aggregator->lag_ports)) { |
| 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; |
| case AD_LINK_SPEED_BITMASK_10000MBPS: |
| bandwidth = aggregator->num_of_ports * 10000; |
| 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 |
| * |
| */ |
| 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; |
| 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; |
| |
| /* 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); |
| |
| memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
| /* Note: source address is set to be the member's PERMANENT address, |
| because we use it to identify loopback lacpdus in receive. */ |
| memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
| lacpdu_header->hdr.h_proto = 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 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); |
| |
| memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
| /* Note: source address is set to be the member's PERMANENT address, |
| because we use it to identify loopback MARKERs in receive. */ |
| memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
| marker_header->hdr.h_proto = 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) { |
| pr_debug("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 = 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: |
| __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 = true; |
| 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 = true; |
| 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; |
| |
| // 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) |
| /* next state */ |
| port->sm_rx_state = AD_RX_INITIALIZE; |
| // check if port is not enabled |
| else if (!(port->sm_vars & AD_PORT_BEGIN) |
| && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) |
| /* next state */ |
| 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))) { |
| 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)) { |
| pr_debug("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_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; |
| 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 |
| pr_err("%s: 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->bond->dev->name, 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: //to silence the compiler |
| break; |
| } |
| } |
| } |
| |
| /** |
| * 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; // 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) { |
| 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; // 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 = true; |
| 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; |
| |
| pr_debug("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 |
| pr_warning("%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 |
| 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; |
| pr_debug("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 = 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; |
| |
| pr_debug("Port %d joined LAG %d(new LAG)\n", |
| port->actor_port_number, |
| port->aggregator->aggregator_identifier); |
| } else { |
| pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", |
| port->slave->bond->dev->name, |
| 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); |
| } |
| |
| /* |
| * 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: |
| pr_warning("%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 |
| * |
| * 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) |
| { |
| struct aggregator *best, *active, *origin; |
| struct port *port; |
| |
| origin = agg; |
| active = __get_active_agg(agg); |
| best = (active && agg_device_up(active)) ? active : NULL; |
| |
| do { |
| agg->is_active = 0; |
| |
| if (agg->num_of_ports && agg_device_up(agg)) |
| best = ad_agg_selection_test(best, agg); |
| |
| } while ((agg = __get_next_agg(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) { |
| pr_debug("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); |
| pr_debug("best ports %p slave %p %s\n", |
| best->lag_ports, best->slave, |
| best->slave ? best->slave->dev->name : "NULL"); |
| |
| for (agg = __get_first_agg(best->lag_ports); agg; |
| agg = __get_next_agg(agg)) { |
| |
| pr_debug("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) { |
| pr_warning("%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; |
| pr_debug("LAG %d chosen as the active LAG\n", |
| best->aggregator_identifier); |
| pr_debug("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); |
| } |
| } |
| } |
| |
| /* |
| * 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); |
| } |
| } |
| } |
| |
| if (origin->slave) { |
| struct bonding *bond; |
| |
| bond = bond_get_bond_by_slave(origin->slave); |
| if (bond) |
| 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_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 = false; |
| 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; |
| |
| memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
| memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); |
| |
| port->is_enabled = true; |
| // ****** 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; |
| |
| memcpy(&port->lacpdu, &lacpdu, sizeof(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) { |
| pr_debug("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))) { |
| pr_debug("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 bond_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) { |
| pr_debug("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 bond_marker *marker_info, |
| struct port *port) |
| { |
| struct bond_marker marker; |
| |
| // copy the received marker data to the response marker |
| //marker = *marker_info; |
| 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; /* 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 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(struct bonding *bond) |
| * |
| * 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; |
| } |
| |
| 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) |
| * |
| * 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_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), |
| bond->dev->dev_addr)) { |
| |
| aggregator_identifier = 0; |
| |
| BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
| BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); |
| |
| // initialize how many times this module is called in one second(should be about every 100ms) |
| ad_ticks_per_sec = tick_resolution; |
| |
| bond_3ad_initiate_agg_selection(bond, |
| AD_AGGREGATOR_SELECTION_TIMER * |
| ad_ticks_per_sec); |
| } |
| } |
| |
| /** |
| * bond_3ad_bind_slave - initialize a slave's port |
| * @slave: slave struct to work on |
| * |
| * Returns: 0 on success |
| * < 0 on error |
| */ |
| 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) { |
| pr_err("%s: The slave %s is not attached to its bond\n", |
| slave->bond->dev->name, slave->dev->name); |
| return -1; |
| } |
| |
| //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); |
| |
| __initialize_port_locks(slave); |
| 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); |
| |
| // 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) { |
| pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", |
| slave->bond->dev->name, slave->dev->name); |
| return; |
| } |
| |
| pr_debug("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 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 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))) { |
| pr_debug("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) { |
| pr_info("%s: Removing an active aggregator\n", |
| aggregator->slave->bond->dev->name); |
| // 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 { |
| pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", |
| slave->bond->dev->name); |
| } |
| } 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) { |
| pr_info("%s: Removing an active aggregator\n", |
| slave->bond->dev->name); |
| // select new active aggregator |
| ad_agg_selection_logic(__get_first_agg(port)); |
| } |
| } |
| } |
| |
| pr_debug("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) { |
| pr_info("%s: Removing an active aggregator\n", |
| slave->bond->dev->name); |
| // 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 work_struct *work) |
| { |
| struct bonding *bond = container_of(work, struct bonding, |
| ad_work.work); |
| struct port *port; |
| struct aggregator *aggregator; |
| |
| read_lock(&bond->lock); |
| |
| //check if there are any slaves |
| if (list_empty(&bond->slave_list)) |
| 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) { |
| pr_warning("%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); |
| } |
| bond_3ad_set_carrier(bond); |
| } |
| |
| // for each port run the state machines |
| for (port = __get_first_port(bond); port; port = __get_next_port(port)) { |
| if (!port->slave) { |
| pr_warning("%s: Warning: Found an uninitialized port\n", |
| bond->dev->name); |
| goto re_arm; |
| } |
| |
| /* Lock around state machines to protect data accessed |
| * by all (e.g., port->sm_vars). ad_rx_machine may run |
| * concurrently due to incoming LACPDU. |
| */ |
| __get_state_machine_lock(port); |
| |
| 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; |
| |
| __release_state_machine_lock(port); |
| } |
| |
| re_arm: |
| queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
| |
| 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. |
| */ |
| 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) { |
| pr_warning("%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; |
| pr_debug("Received LACPDU on port %d\n", |
| port->actor_port_number); |
| /* Protect against concurrent state machines */ |
| __get_state_machine_lock(port); |
| ad_rx_machine(lacpdu, port); |
| __release_state_machine_lock(port); |
| 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: |
| pr_debug("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: |
| pr_debug("Received Marker Response on port %d\n", |
| port->actor_port_number); |
| ad_marker_response_received((struct bond_marker *)lacpdu, port); |
| break; |
| |
| default: |
| pr_debug("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) { |
| pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", |
| slave->bond->dev->name, 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); |
| pr_debug("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) { |
| pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", |
| slave->bond->dev->name, 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); |
| pr_debug("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) { |
| pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", |
| slave->bond->dev->name, 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 = true; |
| 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 = false; |
| 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; |
| } |
| |
| /* |
| * set link state for bonding master: 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; |
| |
| first_slave = bond_first_slave(bond); |
| if (!first_slave) |
| return 0; |
| 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); |
| return 1; |
| } |
| } else if (!netif_carrier_ok(bond->dev)) { |
| netif_carrier_on(bond->dev); |
| return 1; |
| } |
| return 0; |
| } |
| |
| if (netif_carrier_ok(bond->dev)) { |
| netif_carrier_off(bond->dev); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * __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; |
| } |
| |
| /* Wrapper used to hold bond->lock so no slave manipulation can occur */ |
| int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
| { |
| int ret; |
| |
| read_lock(&bond->lock); |
| ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
| read_unlock(&bond->lock); |
| |
| return ret; |
| } |
| |
| int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct slave *slave, *start_at; |
| struct bonding *bond = netdev_priv(dev); |
| int slave_agg_no; |
| int slaves_in_agg; |
| int agg_id; |
| int i; |
| struct ad_info ad_info; |
| int res = 1; |
| |
| read_lock(&bond->lock); |
| if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
| pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", |
| dev->name); |
| goto out; |
| } |
| |
| slaves_in_agg = ad_info.ports; |
| agg_id = ad_info.aggregator_id; |
| |
| if (slaves_in_agg == 0) { |
| /*the aggregator is empty*/ |
| pr_debug("%s: Error: active aggregator is empty\n", dev->name); |
| goto out; |
| } |
| |
| slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg); |
| |
| bond_for_each_slave(bond, slave) { |
| 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) { |
| pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", |
| dev->name, 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: |
| read_unlock(&bond->lock); |
| if (res) { |
| /* no suitable interface, frame not sent */ |
| kfree_skb(skb); |
| } |
| |
| return NETDEV_TX_OK; |
| } |
| |
| int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
| struct slave *slave) |
| { |
| int ret = RX_HANDLER_ANOTHER; |
| struct lacpdu *lacpdu, _lacpdu; |
| |
| if (skb->protocol != PKT_TYPE_LACPDU) |
| return ret; |
| |
| lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
| if (!lacpdu) |
| return ret; |
| |
| read_lock(&bond->lock); |
| ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); |
| read_unlock(&bond->lock); |
| return ret; |
| } |
| |
| /* |
| * When modify lacp_rate parameter via sysfs, |
| * update actor_oper_port_state of each port. |
| * |
| * Hold slave->state_machine_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 slave *slave; |
| struct port *port = NULL; |
| int lacp_fast; |
| |
| write_lock_bh(&bond->lock); |
| lacp_fast = bond->params.lacp_fast; |
| |
| bond_for_each_slave(bond, slave) { |
| port = &(SLAVE_AD_INFO(slave).port); |
| if (port->slave == NULL) |
| continue; |
| __get_state_machine_lock(port); |
| if (lacp_fast) |
| port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
| else |
| port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; |
| __release_state_machine_lock(port); |
| } |
| |
| write_unlock_bh(&bond->lock); |
| } |