![Jay Vosburgh](/assets/img/avatar_default.png)
Fixed handling of 802.3ad LACPDUs. Do not byte swap data in place in the packet. Updated nomenclature of "__ntohs_lacpdu" to be "htons"; it was previously used for both ntohs and htons operations, but only called ntohs functions. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2472 lines
85 KiB
C
2472 lines
85 KiB
C
/*
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* Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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*/
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//#define BONDING_DEBUG 1
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#include <linux/skbuff.h>
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/ethtool.h>
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#include <linux/if_bonding.h>
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#include <linux/pkt_sched.h>
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#include "bonding.h"
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#include "bond_3ad.h"
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// General definitions
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#define AD_SHORT_TIMEOUT 1
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#define AD_LONG_TIMEOUT 0
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#define AD_STANDBY 0x2
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#define AD_MAX_TX_IN_SECOND 3
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#define AD_COLLECTOR_MAX_DELAY 0
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// Timer definitions(43.4.4 in the 802.3ad standard)
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#define AD_FAST_PERIODIC_TIME 1
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#define AD_SLOW_PERIODIC_TIME 30
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#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
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#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
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#define AD_CHURN_DETECTION_TIME 60
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#define AD_AGGREGATE_WAIT_TIME 2
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// Port state definitions(43.4.2.2 in the 802.3ad standard)
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#define AD_STATE_LACP_ACTIVITY 0x1
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#define AD_STATE_LACP_TIMEOUT 0x2
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#define AD_STATE_AGGREGATION 0x4
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#define AD_STATE_SYNCHRONIZATION 0x8
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#define AD_STATE_COLLECTING 0x10
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#define AD_STATE_DISTRIBUTING 0x20
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#define AD_STATE_DEFAULTED 0x40
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#define AD_STATE_EXPIRED 0x80
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// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
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#define AD_PORT_BEGIN 0x1
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#define AD_PORT_LACP_ENABLED 0x2
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#define AD_PORT_ACTOR_CHURN 0x4
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#define AD_PORT_PARTNER_CHURN 0x8
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#define AD_PORT_READY 0x10
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#define AD_PORT_READY_N 0x20
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#define AD_PORT_MATCHED 0x40
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#define AD_PORT_STANDBY 0x80
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#define AD_PORT_SELECTED 0x100
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#define AD_PORT_MOVED 0x200
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// Port Key definitions
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// key is determined according to the link speed, duplex and
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// user key(which is yet not supported)
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// ------------------------------------------------------------
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// Port key : | User key | Speed |Duplex|
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// ------------------------------------------------------------
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// 16 6 1 0
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#define AD_DUPLEX_KEY_BITS 0x1
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#define AD_SPEED_KEY_BITS 0x3E
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#define AD_USER_KEY_BITS 0xFFC0
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//dalloun
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#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
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#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
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#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
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#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
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#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
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//endalloun
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// compare MAC addresses
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#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
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static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}};
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static u16 ad_ticks_per_sec;
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static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
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// ================= 3AD api to bonding and kernel code ==================
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static u16 __get_link_speed(struct port *port);
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static u8 __get_duplex(struct port *port);
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static inline void __initialize_port_locks(struct port *port);
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//conversions
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static void __htons_lacpdu(struct lacpdu *lacpdu);
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static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par);
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// ================= ad code helper functions ==================
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//needed by ad_rx_machine(...)
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static void __record_pdu(struct lacpdu *lacpdu, struct port *port);
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static void __record_default(struct port *port);
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static void __update_selected(struct lacpdu *lacpdu, struct port *port);
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static void __update_default_selected(struct port *port);
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static void __choose_matched(struct lacpdu *lacpdu, struct port *port);
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static void __update_ntt(struct lacpdu *lacpdu, struct port *port);
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//needed for ad_mux_machine(..)
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static void __attach_bond_to_agg(struct port *port);
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static void __detach_bond_from_agg(struct port *port);
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static int __agg_ports_are_ready(struct aggregator *aggregator);
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static void __set_agg_ports_ready(struct aggregator *aggregator, int val);
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//needed for ad_agg_selection_logic(...)
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static u32 __get_agg_bandwidth(struct aggregator *aggregator);
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static struct aggregator *__get_active_agg(struct aggregator *aggregator);
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// ================= main 802.3ad protocol functions ==================
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static int ad_lacpdu_send(struct port *port);
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static int ad_marker_send(struct port *port, struct marker *marker);
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static void ad_mux_machine(struct port *port);
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static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
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static void ad_tx_machine(struct port *port);
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static void ad_periodic_machine(struct port *port);
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static void ad_port_selection_logic(struct port *port);
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static void ad_agg_selection_logic(struct aggregator *aggregator);
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static void ad_clear_agg(struct aggregator *aggregator);
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static void ad_initialize_agg(struct aggregator *aggregator);
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static void ad_initialize_port(struct port *port, int lacp_fast);
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static void ad_initialize_lacpdu(struct lacpdu *Lacpdu);
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static void ad_enable_collecting_distributing(struct port *port);
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static void ad_disable_collecting_distributing(struct port *port);
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static void ad_marker_info_received(struct marker *marker_info, struct port *port);
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static void ad_marker_response_received(struct marker *marker, struct port *port);
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/////////////////////////////////////////////////////////////////////////////////
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// ================= api to bonding and kernel code ==================
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/////////////////////////////////////////////////////////////////////////////////
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/**
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* __get_bond_by_port - get the port's bonding struct
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* @port: the port we're looking at
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*
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* Return @port's bonding struct, or %NULL if it can't be found.
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*/
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static inline struct bonding *__get_bond_by_port(struct port *port)
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{
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if (port->slave == NULL) {
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return NULL;
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}
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return bond_get_bond_by_slave(port->slave);
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}
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/**
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* __get_first_port - get the first port in the bond
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* @bond: the bond we're looking at
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*
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* Return the port of the first slave in @bond, or %NULL if it can't be found.
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*/
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static inline struct port *__get_first_port(struct bonding *bond)
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{
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if (bond->slave_cnt == 0) {
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return NULL;
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}
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return &(SLAVE_AD_INFO(bond->first_slave).port);
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}
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/**
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* __get_next_port - get the next port in the bond
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* @port: the port we're looking at
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*
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* Return the port of the slave that is next in line of @port's slave in the
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* bond, or %NULL if it can't be found.
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*/
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static inline struct port *__get_next_port(struct port *port)
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{
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struct bonding *bond = __get_bond_by_port(port);
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struct slave *slave = port->slave;
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// If there's no bond for this port, or this is the last slave
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if ((bond == NULL) || (slave->next == bond->first_slave)) {
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return NULL;
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}
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return &(SLAVE_AD_INFO(slave->next).port);
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}
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/**
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* __get_first_agg - get the first aggregator in the bond
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* @bond: the bond we're looking at
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*
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* Return the aggregator of the first slave in @bond, or %NULL if it can't be
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* found.
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*/
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static inline struct aggregator *__get_first_agg(struct port *port)
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{
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struct bonding *bond = __get_bond_by_port(port);
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// If there's no bond for this port, or bond has no slaves
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if ((bond == NULL) || (bond->slave_cnt == 0)) {
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return NULL;
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}
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return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
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}
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/**
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* __get_next_agg - get the next aggregator in the bond
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* @aggregator: the aggregator we're looking at
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*
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* Return the aggregator of the slave that is next in line of @aggregator's
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* slave in the bond, or %NULL if it can't be found.
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*/
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static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
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{
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struct slave *slave = aggregator->slave;
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struct bonding *bond = bond_get_bond_by_slave(slave);
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// If there's no bond for this aggregator, or this is the last slave
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if ((bond == NULL) || (slave->next == bond->first_slave)) {
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return NULL;
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}
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return &(SLAVE_AD_INFO(slave->next).aggregator);
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}
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/**
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* __disable_port - disable the port's slave
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* @port: the port we're looking at
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*
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*/
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static inline void __disable_port(struct port *port)
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{
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bond_set_slave_inactive_flags(port->slave);
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}
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/**
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* __enable_port - enable the port's slave, if it's up
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* @port: the port we're looking at
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*
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*/
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static inline void __enable_port(struct port *port)
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{
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struct slave *slave = port->slave;
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if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
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bond_set_slave_active_flags(slave);
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}
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}
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/**
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* __port_is_enabled - check if the port's slave is in active state
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* @port: the port we're looking at
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*
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*/
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static inline int __port_is_enabled(struct port *port)
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{
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return(port->slave->state == BOND_STATE_ACTIVE);
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}
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/**
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* __get_agg_selection_mode - get the aggregator selection mode
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* @port: the port we're looking at
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*
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* Get the aggregator selection mode. Can be %BANDWIDTH or %COUNT.
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*/
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static inline u32 __get_agg_selection_mode(struct port *port)
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{
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struct bonding *bond = __get_bond_by_port(port);
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if (bond == NULL) {
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return AD_BANDWIDTH;
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}
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return BOND_AD_INFO(bond).agg_select_mode;
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}
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/**
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* __check_agg_selection_timer - check if the selection timer has expired
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* @port: the port we're looking at
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*
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*/
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static inline int __check_agg_selection_timer(struct port *port)
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{
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struct bonding *bond = __get_bond_by_port(port);
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if (bond == NULL) {
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return 0;
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}
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return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
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}
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/**
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* __get_rx_machine_lock - lock the port's RX machine
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* @port: the port we're looking at
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*
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*/
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static inline void __get_rx_machine_lock(struct port *port)
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{
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spin_lock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
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}
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/**
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* __release_rx_machine_lock - unlock the port's RX machine
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* @port: the port we're looking at
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*
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*/
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static inline void __release_rx_machine_lock(struct port *port)
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{
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spin_unlock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
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}
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/**
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* __get_link_speed - get a port's speed
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* @port: the port we're looking at
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*
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* Return @port's speed in 802.3ad bitmask format. i.e. one of:
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* 0,
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* %AD_LINK_SPEED_BITMASK_10MBPS,
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* %AD_LINK_SPEED_BITMASK_100MBPS,
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* %AD_LINK_SPEED_BITMASK_1000MBPS,
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* %AD_LINK_SPEED_BITMASK_10000MBPS
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*/
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static u16 __get_link_speed(struct port *port)
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{
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struct slave *slave = port->slave;
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u16 speed;
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/* this if covers only a special case: when the configuration starts with
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* link down, it sets the speed to 0.
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* This is done in spite of the fact that the e100 driver reports 0 to be
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* compatible with MVT in the future.*/
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if (slave->link != BOND_LINK_UP) {
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speed=0;
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} else {
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switch (slave->speed) {
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case SPEED_10:
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speed = AD_LINK_SPEED_BITMASK_10MBPS;
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break;
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case SPEED_100:
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speed = AD_LINK_SPEED_BITMASK_100MBPS;
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break;
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case SPEED_1000:
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speed = AD_LINK_SPEED_BITMASK_1000MBPS;
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break;
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case SPEED_10000:
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speed = AD_LINK_SPEED_BITMASK_10000MBPS;
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break;
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default:
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speed = 0; // unknown speed value from ethtool. shouldn't happen
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break;
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}
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}
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dprintk("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed);
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return speed;
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}
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/**
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* __get_duplex - get a port's duplex
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* @port: the port we're looking at
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*
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* Return @port's duplex in 802.3ad bitmask format. i.e.:
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* 0x01 if in full duplex
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* 0x00 otherwise
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*/
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static u8 __get_duplex(struct port *port)
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{
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struct slave *slave = port->slave;
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u8 retval;
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// handling a special case: when the configuration starts with
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// link down, it sets the duplex to 0.
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if (slave->link != BOND_LINK_UP) {
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retval=0x0;
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} else {
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switch (slave->duplex) {
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case DUPLEX_FULL:
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retval=0x1;
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dprintk("Port %d Received status full duplex update from adapter\n", port->actor_port_number);
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break;
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case DUPLEX_HALF:
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default:
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retval=0x0;
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dprintk("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number);
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break;
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}
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}
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return retval;
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}
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/**
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* __initialize_port_locks - initialize a port's RX machine spinlock
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* @port: the port we're looking at
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*
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*/
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static inline void __initialize_port_locks(struct port *port)
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{
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// make sure it isn't called twice
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spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
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}
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//conversions
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/**
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* __htons_lacpdu - convert the contents of a LACPDU to network byte order
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* @lacpdu: the speicifed lacpdu
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*
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* For each multi-byte field in the lacpdu, convert its content
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*/
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static void __htons_lacpdu(struct lacpdu *lacpdu)
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{
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if (lacpdu) {
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lacpdu->actor_system_priority = htons(lacpdu->actor_system_priority);
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lacpdu->actor_key = htons(lacpdu->actor_key);
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lacpdu->actor_port_priority = htons(lacpdu->actor_port_priority);
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lacpdu->actor_port = htons(lacpdu->actor_port);
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lacpdu->partner_system_priority = htons(lacpdu->partner_system_priority);
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lacpdu->partner_key = htons(lacpdu->partner_key);
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lacpdu->partner_port_priority = htons(lacpdu->partner_port_priority);
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lacpdu->partner_port = htons(lacpdu->partner_port);
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lacpdu->collector_max_delay = htons(lacpdu->collector_max_delay);
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}
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}
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/**
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* __ad_timer_to_ticks - convert a given timer type to AD module ticks
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* @timer_type: which timer to operate
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* @par: timer parameter. see below
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*
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* If @timer_type is %current_while_timer, @par indicates long/short timer.
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* If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
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* %SLOW_PERIODIC_TIME.
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*/
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static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
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{
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u16 retval=0; //to silence the compiler
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switch (timer_type) {
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case AD_CURRENT_WHILE_TIMER: // for rx machine usage
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if (par) { // for short or long timeout
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retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
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} else {
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retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
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}
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break;
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case AD_ACTOR_CHURN_TIMER: // for local churn machine
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retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
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break;
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case AD_PERIODIC_TIMER: // for periodic machine
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retval = (par*ad_ticks_per_sec); // long timeout
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break;
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case AD_PARTNER_CHURN_TIMER: // for remote churn machine
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retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
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break;
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case AD_WAIT_WHILE_TIMER: // for selection machine
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retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
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break;
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}
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return retval;
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}
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/////////////////////////////////////////////////////////////////////////////////
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// ================= ad_rx_machine helper functions ==================
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/////////////////////////////////////////////////////////////////////////////////
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/**
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* __record_pdu - record parameters from a received lacpdu
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* @lacpdu: the lacpdu we've received
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* @port: the port we're looking at
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*
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* Record the parameter values for the Actor carried in a received lacpdu as
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* the current partner operational parameter values and sets
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* actor_oper_port_state.defaulted to FALSE.
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*/
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static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
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{
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// validate lacpdu and port
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if (lacpdu && port) {
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// record the new parameter values for the partner operational
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port->partner_oper_port_number = ntohs(lacpdu->actor_port);
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port->partner_oper_port_priority = ntohs(lacpdu->actor_port_priority);
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port->partner_oper_system = lacpdu->actor_system;
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port->partner_oper_system_priority = ntohs(lacpdu->actor_system_priority);
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port->partner_oper_key = ntohs(lacpdu->actor_key);
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// zero partener's lase states
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port->partner_oper_port_state = 0;
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_ACTIVITY);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_TIMEOUT);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_AGGREGATION);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_COLLECTING);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DISTRIBUTING);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DEFAULTED);
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port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_EXPIRED);
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// set actor_oper_port_state.defaulted to FALSE
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port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
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// set the partner sync. to on if the partner is sync. and the port is matched
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if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
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port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION;
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} else {
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port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
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}
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}
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}
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/**
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* __record_default - record default parameters
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* @port: the port we're looking at
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*
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* This function records the default parameter values for the partner carried
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* in the Partner Admin parameters as the current partner operational parameter
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* values and sets actor_oper_port_state.defaulted to TRUE.
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*/
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static void __record_default(struct port *port)
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{
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// validate the port
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if (port) {
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// record the partner admin parameters
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port->partner_oper_port_number = port->partner_admin_port_number;
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port->partner_oper_port_priority = port->partner_admin_port_priority;
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port->partner_oper_system = port->partner_admin_system;
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port->partner_oper_system_priority = port->partner_admin_system_priority;
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port->partner_oper_key = port->partner_admin_key;
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port->partner_oper_port_state = port->partner_admin_port_state;
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// set actor_oper_port_state.defaulted to true
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port->actor_oper_port_state |= AD_STATE_DEFAULTED;
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}
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}
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/**
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* __update_selected - update a port's Selected variable from a received lacpdu
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* @lacpdu: the lacpdu we've received
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* @port: the port we're looking at
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*
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* Update the value of the selected variable, using parameter values from a
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* newly received lacpdu. The parameter values for the Actor carried in the
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* received PDU are compared with the corresponding operational parameter
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* values for the ports partner. If one or more of the comparisons shows that
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* the value(s) received in the PDU differ from the current operational values,
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* then selected is set to FALSE and actor_oper_port_state.synchronization is
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* set to out_of_sync. Otherwise, selected remains unchanged.
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*/
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static void __update_selected(struct lacpdu *lacpdu, struct port *port)
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{
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// validate lacpdu and port
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if (lacpdu && port) {
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// check if any parameter is different
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if ((ntohs(lacpdu->actor_port) != port->partner_oper_port_number) ||
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(ntohs(lacpdu->actor_port_priority) != port->partner_oper_port_priority) ||
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MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) ||
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(ntohs(lacpdu->actor_system_priority) != port->partner_oper_system_priority) ||
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(ntohs(lacpdu->actor_key) != port->partner_oper_key) ||
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((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION))
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) {
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// update the state machine Selected variable
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port->sm_vars &= ~AD_PORT_SELECTED;
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}
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}
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}
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/**
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* __update_default_selected - update a port's Selected variable from Partner
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* @port: the port we're looking at
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*
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* This function updates the value of the selected variable, using the partner
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* administrative parameter values. The administrative values are compared with
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* the corresponding operational parameter values for the partner. If one or
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* more of the comparisons shows that the administrative value(s) differ from
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* the current operational values, then Selected is set to FALSE and
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* actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
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* Selected remains unchanged.
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*/
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static void __update_default_selected(struct port *port)
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{
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// validate the port
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if (port) {
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// check if any parameter is different
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if ((port->partner_admin_port_number != port->partner_oper_port_number) ||
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(port->partner_admin_port_priority != port->partner_oper_port_priority) ||
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MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) ||
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(port->partner_admin_system_priority != port->partner_oper_system_priority) ||
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(port->partner_admin_key != port->partner_oper_key) ||
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((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION))
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) {
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// update the state machine Selected variable
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port->sm_vars &= ~AD_PORT_SELECTED;
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}
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}
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}
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/**
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* __choose_matched - update a port's matched variable from a received lacpdu
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* @lacpdu: the lacpdu we've received
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* @port: the port we're looking at
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*
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* Update the value of the matched variable, using parameter values from a
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* newly received lacpdu. Parameter values for the partner carried in the
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* received PDU are compared with the corresponding operational parameter
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* values for the actor. Matched is set to TRUE if all of these parameters
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* match and the PDU parameter partner_state.aggregation has the same value as
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* actor_oper_port_state.aggregation and lacp will actively maintain the link
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* in the aggregation. Matched is also set to TRUE if the value of
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* actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
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* an individual link and lacp will actively maintain the link. Otherwise,
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* matched is set to FALSE. LACP is considered to be actively maintaining the
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* link if either the PDU's actor_state.lacp_activity variable is TRUE or both
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* the actor's actor_oper_port_state.lacp_activity and the PDU's
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* partner_state.lacp_activity variables are TRUE.
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*/
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static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
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{
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// validate lacpdu and port
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if (lacpdu && port) {
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// check if all parameters are alike
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if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
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(ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
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!MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
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(ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
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(ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
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((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
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// or this is individual link(aggregation == FALSE)
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((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
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) {
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// update the state machine Matched variable
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port->sm_vars |= AD_PORT_MATCHED;
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} else {
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port->sm_vars &= ~AD_PORT_MATCHED;
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}
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}
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}
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/**
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* __update_ntt - update a port's ntt variable from a received lacpdu
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* @lacpdu: the lacpdu we've received
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* @port: the port we're looking at
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*
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* Updates the value of the ntt variable, using parameter values from a newly
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* received lacpdu. The parameter values for the partner carried in the
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* received PDU are compared with the corresponding operational parameter
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* values for the Actor. If one or more of the comparisons shows that the
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* value(s) received in the PDU differ from the current operational values,
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* then ntt is set to TRUE. Otherwise, ntt remains unchanged.
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*/
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static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
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{
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// validate lacpdu and port
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if (lacpdu && port) {
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// check if any parameter is different
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if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
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(ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
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MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
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(ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
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(ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
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((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
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((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
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((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
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((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
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) {
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// set ntt to be TRUE
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port->ntt = 1;
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}
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}
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}
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/**
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* __attach_bond_to_agg
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* @port: the port we're looking at
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*
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* Handle the attaching of the port's control parser/multiplexer and the
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* aggregator. This function does nothing since the parser/multiplexer of the
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* receive and the parser/multiplexer of the aggregator are already combined.
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*/
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static void __attach_bond_to_agg(struct port *port)
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{
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port=NULL; // just to satisfy the compiler
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// This function does nothing since the parser/multiplexer of the receive
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// and the parser/multiplexer of the aggregator are already combined
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}
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/**
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* __detach_bond_from_agg
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* @port: the port we're looking at
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*
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* Handle the detaching of the port's control parser/multiplexer from the
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* aggregator. This function does nothing since the parser/multiplexer of the
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* receive and the parser/multiplexer of the aggregator are already combined.
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*/
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static void __detach_bond_from_agg(struct port *port)
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{
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port=NULL; // just to satisfy the compiler
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// This function does nothing sience the parser/multiplexer of the receive
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// and the parser/multiplexer of the aggregator are already combined
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}
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/**
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* __agg_ports_are_ready - check if all ports in an aggregator are ready
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* @aggregator: the aggregator we're looking at
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*
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*/
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static int __agg_ports_are_ready(struct aggregator *aggregator)
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{
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struct port *port;
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int retval = 1;
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if (aggregator) {
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// scan all ports in this aggregator to verfy if they are all ready
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for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
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if (!(port->sm_vars & AD_PORT_READY_N)) {
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retval = 0;
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break;
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}
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}
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}
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return retval;
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}
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/**
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* __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
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* @aggregator: the aggregator we're looking at
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* @val: Should the ports' ready bit be set on or off
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*
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*/
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static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
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{
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struct port *port;
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for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
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if (val) {
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port->sm_vars |= AD_PORT_READY;
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} else {
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port->sm_vars &= ~AD_PORT_READY;
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}
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}
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}
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/**
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* __get_agg_bandwidth - get the total bandwidth of an aggregator
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* @aggregator: the aggregator we're looking at
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*
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*/
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static u32 __get_agg_bandwidth(struct aggregator *aggregator)
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{
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u32 bandwidth=0;
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u32 basic_speed;
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if (aggregator->num_of_ports) {
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basic_speed = __get_link_speed(aggregator->lag_ports);
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switch (basic_speed) {
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case AD_LINK_SPEED_BITMASK_1MBPS:
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bandwidth = aggregator->num_of_ports;
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break;
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case AD_LINK_SPEED_BITMASK_10MBPS:
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bandwidth = aggregator->num_of_ports * 10;
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break;
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case AD_LINK_SPEED_BITMASK_100MBPS:
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bandwidth = aggregator->num_of_ports * 100;
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break;
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case AD_LINK_SPEED_BITMASK_1000MBPS:
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bandwidth = aggregator->num_of_ports * 1000;
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break;
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case AD_LINK_SPEED_BITMASK_10000MBPS:
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bandwidth = aggregator->num_of_ports * 10000;
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break;
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default:
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bandwidth=0; // to silent the compilor ....
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}
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}
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return bandwidth;
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}
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|
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/**
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* __get_active_agg - get the current active aggregator
|
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* @aggregator: the aggregator we're looking at
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*
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*/
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static struct aggregator *__get_active_agg(struct aggregator *aggregator)
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{
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struct aggregator *retval = NULL;
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for (; aggregator; aggregator = __get_next_agg(aggregator)) {
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if (aggregator->is_active) {
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retval = aggregator;
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break;
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}
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}
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return retval;
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}
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|
|
/**
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* __update_lacpdu_from_port - update a port's lacpdu fields
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* @port: the port we're looking at
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*
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|
*/
|
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static inline void __update_lacpdu_from_port(struct port *port)
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{
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struct lacpdu *lacpdu = &port->lacpdu;
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|
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/* update current actual Actor parameters */
|
|
/* lacpdu->subtype initialized
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* lacpdu->version_number initialized
|
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* lacpdu->tlv_type_actor_info initialized
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* lacpdu->actor_information_length initialized
|
|
*/
|
|
|
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lacpdu->actor_system_priority = port->actor_system_priority;
|
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lacpdu->actor_system = port->actor_system;
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lacpdu->actor_key = port->actor_oper_port_key;
|
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lacpdu->actor_port_priority = port->actor_port_priority;
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lacpdu->actor_port = port->actor_port_number;
|
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lacpdu->actor_state = port->actor_oper_port_state;
|
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|
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/* lacpdu->reserved_3_1 initialized
|
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* lacpdu->tlv_type_partner_info initialized
|
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* lacpdu->partner_information_length initialized
|
|
*/
|
|
|
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lacpdu->partner_system_priority = port->partner_oper_system_priority;
|
|
lacpdu->partner_system = port->partner_oper_system;
|
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lacpdu->partner_key = port->partner_oper_key;
|
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lacpdu->partner_port_priority = port->partner_oper_port_priority;
|
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lacpdu->partner_port = port->partner_oper_port_number;
|
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lacpdu->partner_state = port->partner_oper_port_state;
|
|
|
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/* lacpdu->reserved_3_2 initialized
|
|
* lacpdu->tlv_type_collector_info initialized
|
|
* lacpdu->collector_information_length initialized
|
|
* collector_max_delay initialized
|
|
* reserved_12[12] initialized
|
|
* tlv_type_terminator initialized
|
|
* terminator_length initialized
|
|
* reserved_50[50] initialized
|
|
*/
|
|
|
|
/* Convert all non u8 parameters to Big Endian for transmit */
|
|
__htons_lacpdu(lacpdu);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////
|
|
// ================= main 802.3ad protocol code ======================================
|
|
//////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* ad_lacpdu_send - send out a lacpdu packet on a given port
|
|
* @port: the port we're looking at
|
|
*
|
|
* Returns: 0 on success
|
|
* < 0 on error
|
|
*/
|
|
static int ad_lacpdu_send(struct port *port)
|
|
{
|
|
struct slave *slave = port->slave;
|
|
struct sk_buff *skb;
|
|
struct lacpdu_header *lacpdu_header;
|
|
int length = sizeof(struct lacpdu_header);
|
|
struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
|
|
|
|
skb = dev_alloc_skb(length);
|
|
if (!skb) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
skb->dev = slave->dev;
|
|
skb->mac.raw = skb->data;
|
|
skb->nh.raw = skb->data + ETH_HLEN;
|
|
skb->protocol = PKT_TYPE_LACPDU;
|
|
skb->priority = TC_PRIO_CONTROL;
|
|
|
|
lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
|
|
|
|
lacpdu_header->ad_header.destination_address = lacpdu_multicast_address;
|
|
/* Note: source addres is set to be the member's PERMANENT address, because we use it
|
|
to identify loopback lacpdus in receive. */
|
|
lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
|
|
lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU;
|
|
|
|
lacpdu_header->lacpdu = port->lacpdu; // struct copy
|
|
|
|
dev_queue_xmit(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ad_marker_send - send marker information/response on a given port
|
|
* @port: the port we're looking at
|
|
* @marker: marker data to send
|
|
*
|
|
* Returns: 0 on success
|
|
* < 0 on error
|
|
*/
|
|
static int ad_marker_send(struct port *port, struct marker *marker)
|
|
{
|
|
struct slave *slave = port->slave;
|
|
struct sk_buff *skb;
|
|
struct marker_header *marker_header;
|
|
int length = sizeof(struct marker_header);
|
|
struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
|
|
|
|
skb = dev_alloc_skb(length + 16);
|
|
if (!skb) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
skb_reserve(skb, 16);
|
|
|
|
skb->dev = slave->dev;
|
|
skb->mac.raw = skb->data;
|
|
skb->nh.raw = skb->data + ETH_HLEN;
|
|
skb->protocol = PKT_TYPE_LACPDU;
|
|
|
|
marker_header = (struct marker_header *)skb_put(skb, length);
|
|
|
|
marker_header->ad_header.destination_address = lacpdu_multicast_address;
|
|
/* Note: source addres is set to be the member's PERMANENT address, because we use it
|
|
to identify loopback MARKERs in receive. */
|
|
marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
|
|
marker_header->ad_header.length_type = PKT_TYPE_LACPDU;
|
|
|
|
marker_header->marker = *marker; // struct copy
|
|
|
|
dev_queue_xmit(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ad_mux_machine - handle a port's mux state machine
|
|
* @port: the port we're looking at
|
|
*
|
|
*/
|
|
static void ad_mux_machine(struct port *port)
|
|
{
|
|
mux_states_t last_state;
|
|
|
|
// keep current State Machine state to compare later if it was changed
|
|
last_state = port->sm_mux_state;
|
|
|
|
if (port->sm_vars & AD_PORT_BEGIN) {
|
|
port->sm_mux_state = AD_MUX_DETACHED; // next state
|
|
} else {
|
|
switch (port->sm_mux_state) {
|
|
case AD_MUX_DETACHED:
|
|
if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
|
|
port->sm_mux_state = AD_MUX_WAITING; // next state
|
|
}
|
|
break;
|
|
case AD_MUX_WAITING:
|
|
// if SELECTED == FALSE return to DETACH state
|
|
if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
|
|
port->sm_vars &= ~AD_PORT_READY_N;
|
|
// in order to withhold the Selection Logic to check all ports READY_N value
|
|
// every callback cycle to update ready variable, we check READY_N and update READY here
|
|
__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
|
|
port->sm_mux_state = AD_MUX_DETACHED; // next state
|
|
break;
|
|
}
|
|
|
|
// check if the wait_while_timer expired
|
|
if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
|
|
port->sm_vars |= AD_PORT_READY_N;
|
|
}
|
|
|
|
// in order to withhold the selection logic to check all ports READY_N value
|
|
// every callback cycle to update ready variable, we check READY_N and update READY here
|
|
__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
|
|
|
|
// if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
|
|
if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
|
|
port->sm_mux_state = AD_MUX_ATTACHED; // next state
|
|
}
|
|
break;
|
|
case AD_MUX_ATTACHED:
|
|
// check also if agg_select_timer expired(so the edable port will take place only after this timer)
|
|
if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
|
|
port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
|
|
} else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
|
|
port->sm_vars &= ~AD_PORT_READY_N;
|
|
// in order to withhold the selection logic to check all ports READY_N value
|
|
// every callback cycle to update ready variable, we check READY_N and update READY here
|
|
__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
|
|
port->sm_mux_state = AD_MUX_DETACHED;// next state
|
|
}
|
|
break;
|
|
case AD_MUX_COLLECTING_DISTRIBUTING:
|
|
if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
|
|
!(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION)
|
|
) {
|
|
port->sm_mux_state = AD_MUX_ATTACHED;// next state
|
|
|
|
} else {
|
|
// if port state hasn't changed make
|
|
// sure that a collecting distributing
|
|
// port in an active aggregator is enabled
|
|
if (port->aggregator &&
|
|
port->aggregator->is_active &&
|
|
!__port_is_enabled(port)) {
|
|
|
|
__enable_port(port);
|
|
}
|
|
}
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
}
|
|
|
|
// check if the state machine was changed
|
|
if (port->sm_mux_state != last_state) {
|
|
dprintk("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state);
|
|
switch (port->sm_mux_state) {
|
|
case AD_MUX_DETACHED:
|
|
__detach_bond_from_agg(port);
|
|
port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
|
|
ad_disable_collecting_distributing(port);
|
|
port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
|
|
port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
|
|
port->ntt = 1;
|
|
break;
|
|
case AD_MUX_WAITING:
|
|
port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
|
|
break;
|
|
case AD_MUX_ATTACHED:
|
|
__attach_bond_to_agg(port);
|
|
port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
|
|
port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
|
|
port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
|
|
ad_disable_collecting_distributing(port);
|
|
port->ntt = 1;
|
|
break;
|
|
case AD_MUX_COLLECTING_DISTRIBUTING:
|
|
port->actor_oper_port_state |= AD_STATE_COLLECTING;
|
|
port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
|
|
ad_enable_collecting_distributing(port);
|
|
port->ntt = 1;
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_rx_machine - handle a port's rx State Machine
|
|
* @lacpdu: the lacpdu we've received
|
|
* @port: the port we're looking at
|
|
*
|
|
* If lacpdu arrived, stop previous timer (if exists) and set the next state as
|
|
* CURRENT. If timer expired set the state machine in the proper state.
|
|
* In other cases, this function checks if we need to switch to other state.
|
|
*/
|
|
static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
|
|
{
|
|
rx_states_t last_state;
|
|
|
|
// Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
|
|
__get_rx_machine_lock(port);
|
|
|
|
// keep current State Machine state to compare later if it was changed
|
|
last_state = port->sm_rx_state;
|
|
|
|
// check if state machine should change state
|
|
// first, check if port was reinitialized
|
|
if (port->sm_vars & AD_PORT_BEGIN) {
|
|
port->sm_rx_state = AD_RX_INITIALIZE; // next state
|
|
}
|
|
// check if port is not enabled
|
|
else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) {
|
|
port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
|
|
}
|
|
// check if new lacpdu arrived
|
|
else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
|
|
port->sm_rx_timer_counter = 0; // zero timer
|
|
port->sm_rx_state = AD_RX_CURRENT;
|
|
} else {
|
|
// if timer is on, and if it is expired
|
|
if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
|
|
switch (port->sm_rx_state) {
|
|
case AD_RX_EXPIRED:
|
|
port->sm_rx_state = AD_RX_DEFAULTED; // next state
|
|
break;
|
|
case AD_RX_CURRENT:
|
|
port->sm_rx_state = AD_RX_EXPIRED; // next state
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
} else {
|
|
// if no lacpdu arrived and no timer is on
|
|
switch (port->sm_rx_state) {
|
|
case AD_RX_PORT_DISABLED:
|
|
if (port->sm_vars & AD_PORT_MOVED) {
|
|
port->sm_rx_state = AD_RX_INITIALIZE; // next state
|
|
} else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
|
|
port->sm_rx_state = AD_RX_EXPIRED; // next state
|
|
} else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
|
|
port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
|
|
}
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
// check if the State machine was changed or new lacpdu arrived
|
|
if ((port->sm_rx_state != last_state) || (lacpdu)) {
|
|
dprintk("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state);
|
|
switch (port->sm_rx_state) {
|
|
case AD_RX_INITIALIZE:
|
|
if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
|
|
port->sm_vars &= ~AD_PORT_LACP_ENABLED;
|
|
} else {
|
|
port->sm_vars |= AD_PORT_LACP_ENABLED;
|
|
}
|
|
port->sm_vars &= ~AD_PORT_SELECTED;
|
|
__record_default(port);
|
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
|
port->sm_vars &= ~AD_PORT_MOVED;
|
|
port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
|
|
|
|
/*- Fall Through -*/
|
|
|
|
case AD_RX_PORT_DISABLED:
|
|
port->sm_vars &= ~AD_PORT_MATCHED;
|
|
break;
|
|
case AD_RX_LACP_DISABLED:
|
|
port->sm_vars &= ~AD_PORT_SELECTED;
|
|
__record_default(port);
|
|
port->partner_oper_port_state &= ~AD_STATE_AGGREGATION;
|
|
port->sm_vars |= AD_PORT_MATCHED;
|
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
|
break;
|
|
case AD_RX_EXPIRED:
|
|
//Reset of the Synchronization flag. (Standard 43.4.12)
|
|
//This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
|
|
//mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
|
|
port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
|
|
port->sm_vars &= ~AD_PORT_MATCHED;
|
|
port->partner_oper_port_state |= AD_SHORT_TIMEOUT;
|
|
port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
|
|
port->actor_oper_port_state |= AD_STATE_EXPIRED;
|
|
break;
|
|
case AD_RX_DEFAULTED:
|
|
__update_default_selected(port);
|
|
__record_default(port);
|
|
port->sm_vars |= AD_PORT_MATCHED;
|
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
|
break;
|
|
case AD_RX_CURRENT:
|
|
// detect loopback situation
|
|
if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
|
|
// INFO_RECEIVED_LOOPBACK_FRAMES
|
|
printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on "
|
|
"adapter (%s). Check the configuration to verify that all "
|
|
"Adapters are connected to 802.3ad compliant switch ports\n",
|
|
port->slave->dev->master->name, port->slave->dev->name);
|
|
__release_rx_machine_lock(port);
|
|
return;
|
|
}
|
|
__update_selected(lacpdu, port);
|
|
__update_ntt(lacpdu, port);
|
|
__record_pdu(lacpdu, port);
|
|
__choose_matched(lacpdu, port);
|
|
port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
|
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
|
// verify that if the aggregator is enabled, the port is enabled too.
|
|
//(because if the link goes down for a short time, the 802.3ad will not
|
|
// catch it, and the port will continue to be disabled)
|
|
if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
|
|
__enable_port(port);
|
|
}
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
}
|
|
__release_rx_machine_lock(port);
|
|
}
|
|
|
|
/**
|
|
* ad_tx_machine - handle a port's tx state machine
|
|
* @port: the port we're looking at
|
|
*
|
|
*/
|
|
static void ad_tx_machine(struct port *port)
|
|
{
|
|
// check if tx timer expired, to verify that we do not send more than 3 packets per second
|
|
if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
|
|
// check if there is something to send
|
|
if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
|
|
__update_lacpdu_from_port(port);
|
|
// send the lacpdu
|
|
if (ad_lacpdu_send(port) >= 0) {
|
|
dprintk("Sent LACPDU on port %d\n", port->actor_port_number);
|
|
// mark ntt as false, so it will not be sent again until demanded
|
|
port->ntt = 0;
|
|
}
|
|
}
|
|
// restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
|
|
port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_periodic_machine - handle a port's periodic state machine
|
|
* @port: the port we're looking at
|
|
*
|
|
* Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
|
|
*/
|
|
static void ad_periodic_machine(struct port *port)
|
|
{
|
|
periodic_states_t last_state;
|
|
|
|
// keep current state machine state to compare later if it was changed
|
|
last_state = port->sm_periodic_state;
|
|
|
|
// check if port was reinitialized
|
|
if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
|
|
(!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY))
|
|
) {
|
|
port->sm_periodic_state = AD_NO_PERIODIC; // next state
|
|
}
|
|
// check if state machine should change state
|
|
else if (port->sm_periodic_timer_counter) {
|
|
// check if periodic state machine expired
|
|
if (!(--port->sm_periodic_timer_counter)) {
|
|
// if expired then do tx
|
|
port->sm_periodic_state = AD_PERIODIC_TX; // next state
|
|
} else {
|
|
// If not expired, check if there is some new timeout parameter from the partner state
|
|
switch (port->sm_periodic_state) {
|
|
case AD_FAST_PERIODIC:
|
|
if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
|
|
port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
|
|
}
|
|
break;
|
|
case AD_SLOW_PERIODIC:
|
|
if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
|
|
// stop current timer
|
|
port->sm_periodic_timer_counter = 0;
|
|
port->sm_periodic_state = AD_PERIODIC_TX; // next state
|
|
}
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
switch (port->sm_periodic_state) {
|
|
case AD_NO_PERIODIC:
|
|
port->sm_periodic_state = AD_FAST_PERIODIC; // next state
|
|
break;
|
|
case AD_PERIODIC_TX:
|
|
if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
|
|
port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
|
|
} else {
|
|
port->sm_periodic_state = AD_FAST_PERIODIC; // next state
|
|
}
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
}
|
|
|
|
// check if the state machine was changed
|
|
if (port->sm_periodic_state != last_state) {
|
|
dprintk("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state);
|
|
switch (port->sm_periodic_state) {
|
|
case AD_NO_PERIODIC:
|
|
port->sm_periodic_timer_counter = 0; // zero timer
|
|
break;
|
|
case AD_FAST_PERIODIC:
|
|
port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
|
|
break;
|
|
case AD_SLOW_PERIODIC:
|
|
port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
|
|
break;
|
|
case AD_PERIODIC_TX:
|
|
port->ntt = 1;
|
|
break;
|
|
default: //to silence the compiler
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_port_selection_logic - select aggregation groups
|
|
* @port: the port we're looking at
|
|
*
|
|
* Select aggregation groups, and assign each port for it's aggregetor. The
|
|
* selection logic is called in the inititalization (after all the handshkes),
|
|
* and after every lacpdu receive (if selected is off).
|
|
*/
|
|
static void ad_port_selection_logic(struct port *port)
|
|
{
|
|
struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
|
|
struct port *last_port = NULL, *curr_port;
|
|
int found = 0;
|
|
|
|
// if the port is already Selected, do nothing
|
|
if (port->sm_vars & AD_PORT_SELECTED) {
|
|
return;
|
|
}
|
|
|
|
// if the port is connected to other aggregator, detach it
|
|
if (port->aggregator) {
|
|
// detach the port from its former aggregator
|
|
temp_aggregator=port->aggregator;
|
|
for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
|
|
if (curr_port == port) {
|
|
temp_aggregator->num_of_ports--;
|
|
if (!last_port) {// if it is the first port attached to the aggregator
|
|
temp_aggregator->lag_ports=port->next_port_in_aggregator;
|
|
} else {// not the first port attached to the aggregator
|
|
last_port->next_port_in_aggregator=port->next_port_in_aggregator;
|
|
}
|
|
|
|
// clear the port's relations to this aggregator
|
|
port->aggregator = NULL;
|
|
port->next_port_in_aggregator=NULL;
|
|
port->actor_port_aggregator_identifier=0;
|
|
|
|
dprintk("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier);
|
|
// if the aggregator is empty, clear its parameters, and set it ready to be attached
|
|
if (!temp_aggregator->lag_ports) {
|
|
ad_clear_agg(temp_aggregator);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
|
|
printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was "
|
|
"related to aggregator %d but was not on its port list\n",
|
|
port->slave->dev->master->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;
|
|
dprintk("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
|
|
|
|
// mark this port as selected
|
|
port->sm_vars |= AD_PORT_SELECTED;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// the port couldn't find an aggregator - attach it to a new aggregator
|
|
if (!found) {
|
|
if (free_aggregator) {
|
|
// assign port a new aggregator
|
|
port->aggregator = free_aggregator;
|
|
port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
|
|
|
|
// update the new aggregator's parameters
|
|
// if port was responsed from the end-user
|
|
if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
|
|
port->aggregator->is_individual = 0;
|
|
} else {
|
|
port->aggregator->is_individual = 1;
|
|
}
|
|
|
|
port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
|
|
port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
|
|
port->aggregator->partner_system=port->partner_oper_system;
|
|
port->aggregator->partner_system_priority = port->partner_oper_system_priority;
|
|
port->aggregator->partner_oper_aggregator_key = port->partner_oper_key;
|
|
port->aggregator->receive_state = 1;
|
|
port->aggregator->transmit_state = 1;
|
|
port->aggregator->lag_ports = port;
|
|
port->aggregator->num_of_ports++;
|
|
|
|
// mark this port as selected
|
|
port->sm_vars |= AD_PORT_SELECTED;
|
|
|
|
dprintk("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
|
|
} else {
|
|
printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n",
|
|
port->slave->dev->master->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));
|
|
|
|
if (!__check_agg_selection_timer(port) && (aggregator = __get_first_agg(port))) {
|
|
ad_agg_selection_logic(aggregator);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_agg_selection_logic - select an aggregation group for a team
|
|
* @aggregator: the aggregator we're looking at
|
|
*
|
|
* It is assumed that only one aggregator may be selected for a team.
|
|
* The logic of this function is to select (at first time) the aggregator with
|
|
* the most ports attached to it, and to reselect the active aggregator only if
|
|
* the previous aggregator has no more ports related to it.
|
|
*
|
|
* FIXME: this function MUST be called with the first agg in the bond, or
|
|
* __get_active_agg() won't work correctly. This function should be better
|
|
* called with the bond itself, and retrieve the first agg from it.
|
|
*/
|
|
static void ad_agg_selection_logic(struct aggregator *aggregator)
|
|
{
|
|
struct aggregator *best_aggregator = NULL, *active_aggregator = NULL;
|
|
struct aggregator *last_active_aggregator = NULL, *origin_aggregator;
|
|
struct port *port;
|
|
u16 num_of_aggs=0;
|
|
|
|
origin_aggregator = aggregator;
|
|
|
|
//get current active aggregator
|
|
last_active_aggregator = __get_active_agg(aggregator);
|
|
|
|
// search for the aggregator with the most ports attached to it.
|
|
do {
|
|
// count how many candidate lag's we have
|
|
if (aggregator->lag_ports) {
|
|
num_of_aggs++;
|
|
}
|
|
if (aggregator->is_active && !aggregator->is_individual && // if current aggregator is the active aggregator
|
|
MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr))) { // and partner answers to 802.3ad PDUs
|
|
if (aggregator->num_of_ports) { // if any ports attached to the current aggregator
|
|
best_aggregator=NULL; // disregard the best aggregator that was chosen by now
|
|
break; // stop the selection of other aggregator if there are any ports attached to this active aggregator
|
|
} else { // no ports attached to this active aggregator
|
|
aggregator->is_active = 0; // mark this aggregator as not active anymore
|
|
}
|
|
}
|
|
if (aggregator->num_of_ports) { // if any ports attached
|
|
if (best_aggregator) { // if there is a candidte aggregator
|
|
//The reasons for choosing new best aggregator:
|
|
// 1. if current agg is NOT individual and the best agg chosen so far is individual OR
|
|
// current and best aggs are both individual or both not individual, AND
|
|
// 2a. current agg partner reply but best agg partner do not reply OR
|
|
// 2b. current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply AND
|
|
// current has more ports/bandwidth, or same amount of ports but current has faster ports, THEN
|
|
// current agg become best agg so far
|
|
|
|
//if current agg is NOT individual and the best agg chosen so far is individual change best_aggregator
|
|
if (!aggregator->is_individual && best_aggregator->is_individual) {
|
|
best_aggregator=aggregator;
|
|
}
|
|
// current and best aggs are both individual or both not individual
|
|
else if ((aggregator->is_individual && best_aggregator->is_individual) ||
|
|
(!aggregator->is_individual && !best_aggregator->is_individual)) {
|
|
// current and best aggs are both individual or both not individual AND
|
|
// current agg partner reply but best agg partner do not reply
|
|
if ((MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) &&
|
|
!MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) {
|
|
best_aggregator=aggregator;
|
|
}
|
|
// current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply
|
|
else if (! (!MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) &&
|
|
MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) {
|
|
if ((__get_agg_selection_mode(aggregator->lag_ports) == AD_BANDWIDTH)&&
|
|
(__get_agg_bandwidth(aggregator) > __get_agg_bandwidth(best_aggregator))) {
|
|
best_aggregator=aggregator;
|
|
} else if (__get_agg_selection_mode(aggregator->lag_ports) == AD_COUNT) {
|
|
if (((aggregator->num_of_ports > best_aggregator->num_of_ports) &&
|
|
(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS))||
|
|
((aggregator->num_of_ports == best_aggregator->num_of_ports) &&
|
|
((u16)(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS) >
|
|
(u16)(best_aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS)))) {
|
|
best_aggregator=aggregator;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
best_aggregator=aggregator;
|
|
}
|
|
}
|
|
aggregator->is_active = 0; // mark all aggregators as not active anymore
|
|
} while ((aggregator = __get_next_agg(aggregator)));
|
|
|
|
// if we have new aggregator selected, don't replace the old aggregator if it has an answering partner,
|
|
// or if both old aggregator and new aggregator don't have answering partner
|
|
if (best_aggregator) {
|
|
if (last_active_aggregator && last_active_aggregator->lag_ports && last_active_aggregator->lag_ports->is_enabled &&
|
|
(MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) || // partner answers OR
|
|
(!MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) && // both old and new
|
|
!MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) // partner do not answer
|
|
) {
|
|
// if new aggregator has link, and old aggregator does not, replace old aggregator.(do nothing)
|
|
// -> don't replace otherwise.
|
|
if (!(!last_active_aggregator->actor_oper_aggregator_key && best_aggregator->actor_oper_aggregator_key)) {
|
|
best_aggregator=NULL;
|
|
last_active_aggregator->is_active = 1; // don't replace good old aggregator
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
// if there is new best aggregator, activate it
|
|
if (best_aggregator) {
|
|
for (aggregator = __get_first_agg(best_aggregator->lag_ports);
|
|
aggregator;
|
|
aggregator = __get_next_agg(aggregator)) {
|
|
|
|
dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n",
|
|
aggregator->aggregator_identifier, aggregator->num_of_ports,
|
|
aggregator->actor_oper_aggregator_key, aggregator->partner_oper_aggregator_key,
|
|
aggregator->is_individual, aggregator->is_active);
|
|
}
|
|
|
|
// check if any partner replys
|
|
if (best_aggregator->is_individual) {
|
|
printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad response from "
|
|
"the link partner for any adapters in the bond\n",
|
|
best_aggregator->slave->dev->master->name);
|
|
}
|
|
|
|
// check if there are more than one aggregator
|
|
if (num_of_aggs > 1) {
|
|
dprintk("Warning: More than one Link Aggregation Group was "
|
|
"found in the bond. Only one group will function in the bond\n");
|
|
}
|
|
|
|
best_aggregator->is_active = 1;
|
|
dprintk("LAG %d choosed as the active LAG\n", best_aggregator->aggregator_identifier);
|
|
dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n",
|
|
best_aggregator->aggregator_identifier, best_aggregator->num_of_ports,
|
|
best_aggregator->actor_oper_aggregator_key, best_aggregator->partner_oper_aggregator_key,
|
|
best_aggregator->is_individual, best_aggregator->is_active);
|
|
|
|
// disable the ports that were related to the former active_aggregator
|
|
if (last_active_aggregator) {
|
|
for (port=last_active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
|
|
__disable_port(port);
|
|
}
|
|
}
|
|
}
|
|
|
|
// if the selected aggregator is of join individuals(partner_system is NULL), enable their ports
|
|
active_aggregator = __get_active_agg(origin_aggregator);
|
|
|
|
if (active_aggregator) {
|
|
if (!MAC_ADDRESS_COMPARE(&(active_aggregator->partner_system), &(null_mac_addr))) {
|
|
for (port=active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
|
|
__enable_port(port);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_clear_agg - clear a given aggregator's parameters
|
|
* @aggregator: the aggregator we're looking at
|
|
*
|
|
*/
|
|
static void ad_clear_agg(struct aggregator *aggregator)
|
|
{
|
|
if (aggregator) {
|
|
aggregator->is_individual = 0;
|
|
aggregator->actor_admin_aggregator_key = 0;
|
|
aggregator->actor_oper_aggregator_key = 0;
|
|
aggregator->partner_system = null_mac_addr;
|
|
aggregator->partner_system_priority = 0;
|
|
aggregator->partner_oper_aggregator_key = 0;
|
|
aggregator->receive_state = 0;
|
|
aggregator->transmit_state = 0;
|
|
aggregator->lag_ports = NULL;
|
|
aggregator->is_active = 0;
|
|
aggregator->num_of_ports = 0;
|
|
dprintk("LAG %d was cleared\n", aggregator->aggregator_identifier);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_initialize_agg - initialize a given aggregator's parameters
|
|
* @aggregator: the aggregator we're looking at
|
|
*
|
|
*/
|
|
static void ad_initialize_agg(struct aggregator *aggregator)
|
|
{
|
|
if (aggregator) {
|
|
ad_clear_agg(aggregator);
|
|
|
|
aggregator->aggregator_mac_address = null_mac_addr;
|
|
aggregator->aggregator_identifier = 0;
|
|
aggregator->slave = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_initialize_port - initialize a given port's parameters
|
|
* @aggregator: the aggregator we're looking at
|
|
* @lacp_fast: boolean. whether fast periodic should be used
|
|
*
|
|
*/
|
|
static void ad_initialize_port(struct port *port, int lacp_fast)
|
|
{
|
|
if (port) {
|
|
port->actor_port_number = 1;
|
|
port->actor_port_priority = 0xff;
|
|
port->actor_system = null_mac_addr;
|
|
port->actor_system_priority = 0xffff;
|
|
port->actor_port_aggregator_identifier = 0;
|
|
port->ntt = 0;
|
|
port->actor_admin_port_key = 1;
|
|
port->actor_oper_port_key = 1;
|
|
port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
|
|
port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
|
|
|
|
if (lacp_fast) {
|
|
port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
|
|
}
|
|
|
|
port->partner_admin_system = null_mac_addr;
|
|
port->partner_oper_system = null_mac_addr;
|
|
port->partner_admin_system_priority = 0xffff;
|
|
port->partner_oper_system_priority = 0xffff;
|
|
port->partner_admin_key = 1;
|
|
port->partner_oper_key = 1;
|
|
port->partner_admin_port_number = 1;
|
|
port->partner_oper_port_number = 1;
|
|
port->partner_admin_port_priority = 0xff;
|
|
port->partner_oper_port_priority = 0xff;
|
|
port->partner_admin_port_state = 1;
|
|
port->partner_oper_port_state = 1;
|
|
port->is_enabled = 1;
|
|
// ****** private parameters ******
|
|
port->sm_vars = 0x3;
|
|
port->sm_rx_state = 0;
|
|
port->sm_rx_timer_counter = 0;
|
|
port->sm_periodic_state = 0;
|
|
port->sm_periodic_timer_counter = 0;
|
|
port->sm_mux_state = 0;
|
|
port->sm_mux_timer_counter = 0;
|
|
port->sm_tx_state = 0;
|
|
port->sm_tx_timer_counter = 0;
|
|
port->slave = NULL;
|
|
port->aggregator = NULL;
|
|
port->next_port_in_aggregator = NULL;
|
|
port->transaction_id = 0;
|
|
|
|
ad_initialize_lacpdu(&(port->lacpdu));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_enable_collecting_distributing - enable a port's transmit/receive
|
|
* @port: the port we're looking at
|
|
*
|
|
* Enable @port if it's in an active aggregator
|
|
*/
|
|
static void ad_enable_collecting_distributing(struct port *port)
|
|
{
|
|
if (port->aggregator->is_active) {
|
|
dprintk("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
|
|
__enable_port(port);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_disable_collecting_distributing - disable a port's transmit/receive
|
|
* @port: the port we're looking at
|
|
*
|
|
*/
|
|
static void ad_disable_collecting_distributing(struct port *port)
|
|
{
|
|
if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
|
|
dprintk("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
|
|
__disable_port(port);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/**
|
|
* ad_marker_info_send - send a marker information frame
|
|
* @port: the port we're looking at
|
|
*
|
|
* This function does nothing since we decided not to implement send and handle
|
|
* response for marker PDU's, in this stage, but only to respond to marker
|
|
* information.
|
|
*/
|
|
static void ad_marker_info_send(struct port *port)
|
|
{
|
|
struct marker marker;
|
|
u16 index;
|
|
|
|
// fill the marker PDU with the appropriate values
|
|
marker.subtype = 0x02;
|
|
marker.version_number = 0x01;
|
|
marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
|
|
marker.marker_length = 0x16;
|
|
// convert requester_port to Big Endian
|
|
marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
|
|
marker.requester_system = port->actor_system;
|
|
// convert requester_port(u32) to Big Endian
|
|
marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
|
|
marker.pad = 0;
|
|
marker.tlv_type_terminator = 0x00;
|
|
marker.terminator_length = 0x00;
|
|
for (index=0; index<90; index++) {
|
|
marker.reserved_90[index]=0;
|
|
}
|
|
|
|
// send the marker information
|
|
if (ad_marker_send(port, &marker) >= 0) {
|
|
dprintk("Sent Marker Information on port %d\n", port->actor_port_number);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* ad_marker_info_received - handle receive of a Marker information frame
|
|
* @marker_info: Marker info received
|
|
* @port: the port we're looking at
|
|
*
|
|
*/
|
|
static void ad_marker_info_received(struct marker *marker_info,struct port *port)
|
|
{
|
|
struct marker marker;
|
|
|
|
// copy the received marker data to the response marker
|
|
//marker = *marker_info;
|
|
memcpy(&marker, marker_info, sizeof(struct marker));
|
|
// change the marker subtype to marker response
|
|
marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE;
|
|
// send the marker response
|
|
|
|
if (ad_marker_send(port, &marker) >= 0) {
|
|
dprintk("Sent Marker Response on port %d\n", port->actor_port_number);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ad_marker_response_received - handle receive of a marker response frame
|
|
* @marker: marker PDU received
|
|
* @port: the port we're looking at
|
|
*
|
|
* This function does nothing since we decided not to implement send and handle
|
|
* response for marker PDU's, in this stage, but only to respond to marker
|
|
* information.
|
|
*/
|
|
static void ad_marker_response_received(struct marker *marker, struct port *port)
|
|
{
|
|
marker=NULL; // just to satisfy the compiler
|
|
port=NULL; // just to satisfy the compiler
|
|
// DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
|
|
}
|
|
|
|
/**
|
|
* ad_initialize_lacpdu - initialize a given lacpdu structure
|
|
* @lacpdu: lacpdu structure to initialize
|
|
*
|
|
*/
|
|
static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
|
|
{
|
|
u16 index;
|
|
|
|
// initialize lacpdu data
|
|
lacpdu->subtype = 0x01;
|
|
lacpdu->version_number = 0x01;
|
|
lacpdu->tlv_type_actor_info = 0x01;
|
|
lacpdu->actor_information_length = 0x14;
|
|
// lacpdu->actor_system_priority updated on send
|
|
// lacpdu->actor_system updated on send
|
|
// lacpdu->actor_key updated on send
|
|
// lacpdu->actor_port_priority updated on send
|
|
// lacpdu->actor_port updated on send
|
|
// lacpdu->actor_state updated on send
|
|
lacpdu->tlv_type_partner_info = 0x02;
|
|
lacpdu->partner_information_length = 0x14;
|
|
for (index=0; index<=2; index++) {
|
|
lacpdu->reserved_3_1[index]=0;
|
|
}
|
|
// lacpdu->partner_system_priority updated on send
|
|
// lacpdu->partner_system updated on send
|
|
// lacpdu->partner_key updated on send
|
|
// lacpdu->partner_port_priority updated on send
|
|
// lacpdu->partner_port updated on send
|
|
// lacpdu->partner_state updated on send
|
|
for (index=0; index<=2; index++) {
|
|
lacpdu->reserved_3_2[index]=0;
|
|
}
|
|
lacpdu->tlv_type_collector_info = 0x03;
|
|
lacpdu->collector_information_length= 0x10;
|
|
lacpdu->collector_max_delay = AD_COLLECTOR_MAX_DELAY;
|
|
for (index=0; index<=11; index++) {
|
|
lacpdu->reserved_12[index]=0;
|
|
}
|
|
lacpdu->tlv_type_terminator = 0x00;
|
|
lacpdu->terminator_length = 0;
|
|
for (index=0; index<=49; index++) {
|
|
lacpdu->reserved_50[index]=0;
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////
|
|
// ================= AD exported functions to the main bonding code ==================
|
|
//////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Check aggregators status in team every T seconds
|
|
#define AD_AGGREGATOR_SELECTION_TIMER 8
|
|
|
|
static u16 aggregator_identifier;
|
|
|
|
/**
|
|
* bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
|
|
* @bond: bonding struct to work on
|
|
* @tick_resolution: tick duration (millisecond resolution)
|
|
* @lacp_fast: boolean. whether fast periodic should be used
|
|
*
|
|
* Can be called only after the mac address of the bond is set.
|
|
*/
|
|
void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
|
|
{
|
|
// check that the bond is not initialized yet
|
|
if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) {
|
|
|
|
aggregator_identifier = 0;
|
|
|
|
BOND_AD_INFO(bond).lacp_fast = lacp_fast;
|
|
BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
|
|
BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
|
|
|
|
// initialize how many times this module is called in one second(should be about every 100ms)
|
|
ad_ticks_per_sec = tick_resolution;
|
|
|
|
// initialize the aggregator selection timer(to activate an aggregation selection after initialize)
|
|
BOND_AD_INFO(bond).agg_select_timer = (AD_AGGREGATOR_SELECTION_TIMER * ad_ticks_per_sec);
|
|
BOND_AD_INFO(bond).agg_select_mode = AD_BANDWIDTH;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bond_3ad_bind_slave - initialize a slave's port
|
|
* @slave: slave struct to work on
|
|
*
|
|
* Returns: 0 on success
|
|
* < 0 on error
|
|
*/
|
|
int bond_3ad_bind_slave(struct slave *slave)
|
|
{
|
|
struct bonding *bond = bond_get_bond_by_slave(slave);
|
|
struct port *port;
|
|
struct aggregator *aggregator;
|
|
|
|
if (bond == NULL) {
|
|
printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n",
|
|
slave->dev->master->name, slave->dev->name);
|
|
return -1;
|
|
}
|
|
|
|
//check that the slave has not been intialized yet.
|
|
if (SLAVE_AD_INFO(slave).port.slave != slave) {
|
|
|
|
// port initialization
|
|
port = &(SLAVE_AD_INFO(slave).port);
|
|
|
|
ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
|
|
|
|
port->slave = slave;
|
|
port->actor_port_number = SLAVE_AD_INFO(slave).id;
|
|
// key is determined according to the link speed, duplex and user key(which is yet not supported)
|
|
// ------------------------------------------------------------
|
|
// Port key : | User key | Speed |Duplex|
|
|
// ------------------------------------------------------------
|
|
// 16 6 1 0
|
|
port->actor_admin_port_key = 0; // initialize this parameter
|
|
port->actor_admin_port_key |= __get_duplex(port);
|
|
port->actor_admin_port_key |= (__get_link_speed(port) << 1);
|
|
port->actor_oper_port_key = port->actor_admin_port_key;
|
|
// if the port is not full duplex, then the port should be not lacp Enabled
|
|
if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
|
|
port->sm_vars &= ~AD_PORT_LACP_ENABLED;
|
|
}
|
|
// actor system is the bond's system
|
|
port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
|
|
// tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
|
|
port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
|
|
port->aggregator = NULL;
|
|
port->next_port_in_aggregator = NULL;
|
|
|
|
__disable_port(port);
|
|
__initialize_port_locks(port);
|
|
|
|
|
|
// aggregator initialization
|
|
aggregator = &(SLAVE_AD_INFO(slave).aggregator);
|
|
|
|
ad_initialize_agg(aggregator);
|
|
|
|
aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
|
|
aggregator->aggregator_identifier = (++aggregator_identifier);
|
|
aggregator->slave = slave;
|
|
aggregator->is_active = 0;
|
|
aggregator->num_of_ports = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* bond_3ad_unbind_slave - deinitialize a slave's port
|
|
* @slave: slave struct to work on
|
|
*
|
|
* Search for the aggregator that is related to this port, remove the
|
|
* aggregator and assign another aggregator for other port related to it
|
|
* (if any), and remove the port.
|
|
*/
|
|
void bond_3ad_unbind_slave(struct slave *slave)
|
|
{
|
|
struct port *port, *prev_port, *temp_port;
|
|
struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
|
|
int select_new_active_agg = 0;
|
|
|
|
// find the aggregator related to this slave
|
|
aggregator = &(SLAVE_AD_INFO(slave).aggregator);
|
|
|
|
// find the port related to this slave
|
|
port = &(SLAVE_AD_INFO(slave).port);
|
|
|
|
// if slave is null, the whole port is not initialized
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to "
|
|
"unbind an uninitialized port on %s\n",
|
|
slave->dev->master->name, slave->dev->name);
|
|
return;
|
|
}
|
|
|
|
dprintk("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier);
|
|
|
|
/* Tell the partner that this port is not suitable for aggregation */
|
|
port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
|
|
__update_lacpdu_from_port(port);
|
|
ad_lacpdu_send(port);
|
|
|
|
// check if this aggregator is occupied
|
|
if (aggregator->lag_ports) {
|
|
// check if there are other ports related to this aggregator except
|
|
// the port related to this slave(thats ensure us that there is a
|
|
// reason to search for new aggregator, and that we will find one
|
|
if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
|
|
// find new aggregator for the related port(s)
|
|
new_aggregator = __get_first_agg(port);
|
|
for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
|
|
// if the new aggregator is empty, or it connected to to our port only
|
|
if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
|
|
break;
|
|
}
|
|
}
|
|
// if new aggregator found, copy the aggregator's parameters
|
|
// and connect the related lag_ports to the new aggregator
|
|
if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
|
|
dprintk("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier);
|
|
|
|
if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
|
|
printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
|
|
aggregator->slave->dev->master->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 {
|
|
printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, "
|
|
"and could not find a new aggregator for its ports\n",
|
|
slave->dev->master->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) {
|
|
printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
|
|
slave->dev->master->name);
|
|
// select new active aggregator
|
|
ad_agg_selection_logic(__get_first_agg(port));
|
|
}
|
|
}
|
|
}
|
|
|
|
dprintk("Unbinding port %d\n", port->actor_port_number);
|
|
// find the aggregator that this port is connected to
|
|
temp_aggregator = __get_first_agg(port);
|
|
for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
|
|
prev_port = NULL;
|
|
// search the port in the aggregator's related ports
|
|
for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
|
|
if (temp_port == port) { // the aggregator found - detach the port from this aggregator
|
|
if (prev_port) {
|
|
prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
|
|
} else {
|
|
temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
|
|
}
|
|
temp_aggregator->num_of_ports--;
|
|
if (temp_aggregator->num_of_ports==0) {
|
|
select_new_active_agg = temp_aggregator->is_active;
|
|
// clear the aggregator
|
|
ad_clear_agg(temp_aggregator);
|
|
if (select_new_active_agg) {
|
|
printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
|
|
slave->dev->master->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 bonding *bond)
|
|
{
|
|
struct port *port;
|
|
struct aggregator *aggregator;
|
|
|
|
read_lock(&bond->lock);
|
|
|
|
if (bond->kill_timers) {
|
|
goto out;
|
|
}
|
|
|
|
//check if there are any slaves
|
|
if (bond->slave_cnt == 0) {
|
|
goto re_arm;
|
|
}
|
|
|
|
// check if agg_select_timer timer after initialize is timed out
|
|
if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
|
|
// select the active aggregator for the bond
|
|
if ((port = __get_first_port(bond))) {
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": %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);
|
|
}
|
|
}
|
|
|
|
// for each port run the state machines
|
|
for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": %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);
|
|
ad_mux_machine(port);
|
|
ad_tx_machine(port);
|
|
|
|
// turn off the BEGIN bit, since we already handled it
|
|
if (port->sm_vars & AD_PORT_BEGIN) {
|
|
port->sm_vars &= ~AD_PORT_BEGIN;
|
|
}
|
|
}
|
|
|
|
re_arm:
|
|
mod_timer(&(BOND_AD_INFO(bond).ad_timer), jiffies + ad_delta_in_ticks);
|
|
out:
|
|
read_unlock(&bond->lock);
|
|
}
|
|
|
|
/**
|
|
* bond_3ad_rx_indication - handle a received frame
|
|
* @lacpdu: received lacpdu
|
|
* @slave: slave struct to work on
|
|
* @length: length of the data received
|
|
*
|
|
* It is assumed that frames that were sent on this NIC don't returned as new
|
|
* received frames (loopback). Since only the payload is given to this
|
|
* function, it check for loopback.
|
|
*/
|
|
static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
|
|
{
|
|
struct port *port;
|
|
|
|
if (length >= sizeof(struct lacpdu)) {
|
|
|
|
port = &(SLAVE_AD_INFO(slave).port);
|
|
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is "
|
|
"uninitialized\n", slave->dev->name, slave->dev->master->name);
|
|
return;
|
|
}
|
|
|
|
switch (lacpdu->subtype) {
|
|
case AD_TYPE_LACPDU:
|
|
dprintk("Received LACPDU on port %d\n", port->actor_port_number);
|
|
ad_rx_machine(lacpdu, port);
|
|
break;
|
|
|
|
case AD_TYPE_MARKER:
|
|
// No need to convert fields to Little Endian since we don't use the marker's fields.
|
|
|
|
switch (((struct marker *)lacpdu)->tlv_type) {
|
|
case AD_MARKER_INFORMATION_SUBTYPE:
|
|
dprintk("Received Marker Information on port %d\n", port->actor_port_number);
|
|
ad_marker_info_received((struct marker *)lacpdu, port);
|
|
break;
|
|
|
|
case AD_MARKER_RESPONSE_SUBTYPE:
|
|
dprintk("Received Marker Response on port %d\n", port->actor_port_number);
|
|
ad_marker_response_received((struct marker *)lacpdu, port);
|
|
break;
|
|
|
|
default:
|
|
dprintk("Received an unknown Marker subtype on slot %d\n", port->actor_port_number);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* bond_3ad_adapter_speed_changed - handle a slave's speed change indication
|
|
* @slave: slave struct to work on
|
|
*
|
|
* Handle reselection of aggregator (if needed) for this port.
|
|
*/
|
|
void bond_3ad_adapter_speed_changed(struct slave *slave)
|
|
{
|
|
struct port *port;
|
|
|
|
port = &(SLAVE_AD_INFO(slave).port);
|
|
|
|
// if slave is null, the whole port is not initialized
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": Warning: %s: speed "
|
|
"changed for uninitialized port on %s\n",
|
|
slave->dev->master->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);
|
|
dprintk("Port %d changed speed\n", port->actor_port_number);
|
|
// there is no need to reselect a new aggregator, just signal the
|
|
// state machines to reinitialize
|
|
port->sm_vars |= AD_PORT_BEGIN;
|
|
}
|
|
|
|
/**
|
|
* bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
|
|
* @slave: slave struct to work on
|
|
*
|
|
* Handle reselection of aggregator (if needed) for this port.
|
|
*/
|
|
void bond_3ad_adapter_duplex_changed(struct slave *slave)
|
|
{
|
|
struct port *port;
|
|
|
|
port=&(SLAVE_AD_INFO(slave).port);
|
|
|
|
// if slave is null, the whole port is not initialized
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed "
|
|
"for uninitialized port on %s\n",
|
|
slave->dev->master->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);
|
|
dprintk("Port %d changed duplex\n", port->actor_port_number);
|
|
// there is no need to reselect a new aggregator, just signal the
|
|
// state machines to reinitialize
|
|
port->sm_vars |= AD_PORT_BEGIN;
|
|
}
|
|
|
|
/**
|
|
* bond_3ad_handle_link_change - handle a slave's link status change indication
|
|
* @slave: slave struct to work on
|
|
* @status: whether the link is now up or down
|
|
*
|
|
* Handle reselection of aggregator (if needed) for this port.
|
|
*/
|
|
void bond_3ad_handle_link_change(struct slave *slave, char link)
|
|
{
|
|
struct port *port;
|
|
|
|
port = &(SLAVE_AD_INFO(slave).port);
|
|
|
|
// if slave is null, the whole port is not initialized
|
|
if (!port->slave) {
|
|
printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for "
|
|
"uninitialized port on %s\n",
|
|
slave->dev->master->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 = 1;
|
|
port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
|
|
port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
|
|
port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
|
|
port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
|
|
} else {
|
|
/* link has failed */
|
|
port->is_enabled = 0;
|
|
port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
|
|
port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
|
|
}
|
|
//BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
|
|
// there is no need to reselect a new aggregator, just signal the
|
|
// state machines to reinitialize
|
|
port->sm_vars |= AD_PORT_BEGIN;
|
|
}
|
|
|
|
/*
|
|
* set link state for bonding master: if we have an active partnered
|
|
* 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.
|
|
*
|
|
* 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 *agg;
|
|
|
|
agg = __get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator));
|
|
if (agg && MAC_ADDRESS_COMPARE(&agg->partner_system, &null_mac_addr)) {
|
|
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;
|
|
}
|
|
|
|
int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct slave *slave, *start_at;
|
|
struct bonding *bond = dev->priv;
|
|
int slave_agg_no;
|
|
int slaves_in_agg;
|
|
int agg_id;
|
|
int i;
|
|
struct ad_info ad_info;
|
|
int res = 1;
|
|
|
|
/* make sure that the slaves list will
|
|
* not change during tx
|
|
*/
|
|
read_lock(&bond->lock);
|
|
|
|
if (!BOND_IS_OK(bond)) {
|
|
goto out;
|
|
}
|
|
|
|
if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
|
|
printk(KERN_DEBUG DRV_NAME ": %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*/
|
|
printk(KERN_DEBUG DRV_NAME ": %s: Error: active "
|
|
"aggregator is empty\n",
|
|
dev->name);
|
|
goto out;
|
|
}
|
|
|
|
slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg);
|
|
|
|
bond_for_each_slave(bond, slave, i) {
|
|
struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
|
|
|
|
if (agg && (agg->aggregator_identifier == agg_id)) {
|
|
slave_agg_no--;
|
|
if (slave_agg_no < 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (slave_agg_no >= 0) {
|
|
printk(KERN_ERR DRV_NAME ": %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:
|
|
if (res) {
|
|
/* no suitable interface, frame not sent */
|
|
dev_kfree_skb(skb);
|
|
}
|
|
read_unlock(&bond->lock);
|
|
return 0;
|
|
}
|
|
|
|
int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
|
|
{
|
|
struct bonding *bond = dev->priv;
|
|
struct slave *slave = NULL;
|
|
int ret = NET_RX_DROP;
|
|
|
|
if (!(dev->flags & IFF_MASTER))
|
|
goto out;
|
|
|
|
read_lock(&bond->lock);
|
|
slave = bond_get_slave_by_dev((struct bonding *)dev->priv, orig_dev);
|
|
if (!slave)
|
|
goto out_unlock;
|
|
|
|
bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
|
|
|
|
ret = NET_RX_SUCCESS;
|
|
|
|
out_unlock:
|
|
read_unlock(&bond->lock);
|
|
out:
|
|
dev_kfree_skb(skb);
|
|
|
|
return ret;
|
|
}
|
|
|