/*
|
* Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
|
*
|
* This program is free software; you can redistribute it and/or modify it
|
* under the terms of the GNU General Public License as published by the Free
|
* Software Foundation; either version 2 of the License, or (at your option)
|
* any later version.
|
*
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
* more details.
|
*
|
* You should have received a copy of the GNU General Public License along with
|
* this program; if not, write to the Free Software Foundation, Inc., 59
|
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
*
|
* The full GNU General Public License is included in this distribution in the
|
* file called LICENSE.
|
*
|
*/
|
|
#include <linux/skbuff.h>
|
#include <linux/if_ether.h>
|
#include <linux/netdevice.h>
|
#include <linux/spinlock.h>
|
#include <linux/ethtool.h>
|
#include <linux/etherdevice.h>
|
#include <linux/if_bonding.h>
|
#include <linux/pkt_sched.h>
|
#include <net/net_namespace.h>
|
#include <net/bonding.h>
|
#include <net/bond_3ad.h>
|
|
/* General definitions */
|
#define AD_SHORT_TIMEOUT 1
|
#define AD_LONG_TIMEOUT 0
|
#define AD_STANDBY 0x2
|
#define AD_MAX_TX_IN_SECOND 3
|
#define AD_COLLECTOR_MAX_DELAY 0
|
|
/* Timer definitions (43.4.4 in the 802.3ad standard) */
|
#define AD_FAST_PERIODIC_TIME 1
|
#define AD_SLOW_PERIODIC_TIME 30
|
#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
|
#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
|
#define AD_CHURN_DETECTION_TIME 60
|
#define AD_AGGREGATE_WAIT_TIME 2
|
|
/* Port state definitions (43.4.2.2 in the 802.3ad standard) */
|
#define AD_STATE_LACP_ACTIVITY 0x1
|
#define AD_STATE_LACP_TIMEOUT 0x2
|
#define AD_STATE_AGGREGATION 0x4
|
#define AD_STATE_SYNCHRONIZATION 0x8
|
#define AD_STATE_COLLECTING 0x10
|
#define AD_STATE_DISTRIBUTING 0x20
|
#define AD_STATE_DEFAULTED 0x40
|
#define AD_STATE_EXPIRED 0x80
|
|
/* Port Variables definitions used by the State Machines (43.4.7 in the
|
* 802.3ad standard)
|
*/
|
#define AD_PORT_BEGIN 0x1
|
#define AD_PORT_LACP_ENABLED 0x2
|
#define AD_PORT_ACTOR_CHURN 0x4
|
#define AD_PORT_PARTNER_CHURN 0x8
|
#define AD_PORT_READY 0x10
|
#define AD_PORT_READY_N 0x20
|
#define AD_PORT_MATCHED 0x40
|
#define AD_PORT_STANDBY 0x80
|
#define AD_PORT_SELECTED 0x100
|
#define AD_PORT_MOVED 0x200
|
#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
|
|
/* Port Key definitions
|
* key is determined according to the link speed, duplex and
|
* user key (which is yet not supported)
|
* --------------------------------------------------------------
|
* Port key | User key (10 bits) | Speed (5 bits) | Duplex|
|
* --------------------------------------------------------------
|
* |15 6|5 1|0
|
*/
|
#define AD_DUPLEX_KEY_MASKS 0x1
|
#define AD_SPEED_KEY_MASKS 0x3E
|
#define AD_USER_KEY_MASKS 0xFFC0
|
|
enum ad_link_speed_type {
|
AD_LINK_SPEED_1MBPS = 1,
|
AD_LINK_SPEED_10MBPS,
|
AD_LINK_SPEED_100MBPS,
|
AD_LINK_SPEED_1000MBPS,
|
AD_LINK_SPEED_2500MBPS,
|
AD_LINK_SPEED_5000MBPS,
|
AD_LINK_SPEED_10000MBPS,
|
AD_LINK_SPEED_14000MBPS,
|
AD_LINK_SPEED_20000MBPS,
|
AD_LINK_SPEED_25000MBPS,
|
AD_LINK_SPEED_40000MBPS,
|
AD_LINK_SPEED_50000MBPS,
|
AD_LINK_SPEED_56000MBPS,
|
AD_LINK_SPEED_100000MBPS,
|
};
|
|
/* compare MAC addresses */
|
#define MAC_ADDRESS_EQUAL(A, B) \
|
ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
|
|
static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
|
0, 0, 0, 0, 0, 0
|
};
|
static u16 ad_ticks_per_sec;
|
static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
|
|
static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
|
MULTICAST_LACPDU_ADDR;
|
|
/* ================= main 802.3ad protocol functions ================== */
|
static int ad_lacpdu_send(struct port *port);
|
static int ad_marker_send(struct port *port, struct bond_marker *marker);
|
static void ad_mux_machine(struct port *port, bool *update_slave_arr);
|
static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
|
static void ad_tx_machine(struct port *port);
|
static void ad_periodic_machine(struct port *port);
|
static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
|
static void ad_agg_selection_logic(struct aggregator *aggregator,
|
bool *update_slave_arr);
|
static void ad_clear_agg(struct aggregator *aggregator);
|
static void ad_initialize_agg(struct aggregator *aggregator);
|
static void ad_initialize_port(struct port *port, int lacp_fast);
|
static void ad_enable_collecting_distributing(struct port *port,
|
bool *update_slave_arr);
|
static void ad_disable_collecting_distributing(struct port *port,
|
bool *update_slave_arr);
|
static void ad_marker_info_received(struct bond_marker *marker_info,
|
struct port *port);
|
static void ad_marker_response_received(struct bond_marker *marker,
|
struct port *port);
|
static void ad_update_actor_keys(struct port *port, bool reset);
|
|
|
/* ================= api to bonding and kernel code ================== */
|
|
/**
|
* __get_bond_by_port - get the port's bonding struct
|
* @port: the port we're looking at
|
*
|
* Return @port's bonding struct, or %NULL if it can't be found.
|
*/
|
static inline struct bonding *__get_bond_by_port(struct port *port)
|
{
|
if (port->slave == NULL)
|
return NULL;
|
|
return bond_get_bond_by_slave(port->slave);
|
}
|
|
/**
|
* __get_first_agg - get the first aggregator in the bond
|
* @bond: the bond we're looking at
|
*
|
* Return the aggregator of the first slave in @bond, or %NULL if it can't be
|
* found.
|
* The caller must hold RCU or RTNL lock.
|
*/
|
static inline struct aggregator *__get_first_agg(struct port *port)
|
{
|
struct bonding *bond = __get_bond_by_port(port);
|
struct slave *first_slave;
|
struct aggregator *agg;
|
|
/* If there's no bond for this port, or bond has no slaves */
|
if (bond == NULL)
|
return NULL;
|
|
rcu_read_lock();
|
first_slave = bond_first_slave_rcu(bond);
|
agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
|
rcu_read_unlock();
|
|
return agg;
|
}
|
|
/**
|
* __agg_has_partner - see if we have a partner
|
* @agg: the agregator we're looking at
|
*
|
* Return nonzero if aggregator has a partner (denoted by a non-zero ether
|
* address for the partner). Return 0 if not.
|
*/
|
static inline int __agg_has_partner(struct aggregator *agg)
|
{
|
return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
|
}
|
|
/**
|
* __disable_port - disable the port's slave
|
* @port: the port we're looking at
|
*/
|
static inline void __disable_port(struct port *port)
|
{
|
bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
|
}
|
|
/**
|
* __enable_port - enable the port's slave, if it's up
|
* @port: the port we're looking at
|
*/
|
static inline void __enable_port(struct port *port)
|
{
|
struct slave *slave = port->slave;
|
|
if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
|
bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
|
}
|
|
/**
|
* __port_is_enabled - check if the port's slave is in active state
|
* @port: the port we're looking at
|
*/
|
static inline int __port_is_enabled(struct port *port)
|
{
|
return bond_is_active_slave(port->slave);
|
}
|
|
/**
|
* __get_agg_selection_mode - get the aggregator selection mode
|
* @port: the port we're looking at
|
*
|
* Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
|
*/
|
static inline u32 __get_agg_selection_mode(struct port *port)
|
{
|
struct bonding *bond = __get_bond_by_port(port);
|
|
if (bond == NULL)
|
return BOND_AD_STABLE;
|
|
return bond->params.ad_select;
|
}
|
|
/**
|
* __check_agg_selection_timer - check if the selection timer has expired
|
* @port: the port we're looking at
|
*/
|
static inline int __check_agg_selection_timer(struct port *port)
|
{
|
struct bonding *bond = __get_bond_by_port(port);
|
|
if (bond == NULL)
|
return 0;
|
|
return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;
|
}
|
|
/**
|
* __get_link_speed - get a port's speed
|
* @port: the port we're looking at
|
*
|
* Return @port's speed in 802.3ad enum format. i.e. one of:
|
* 0,
|
* %AD_LINK_SPEED_10MBPS,
|
* %AD_LINK_SPEED_100MBPS,
|
* %AD_LINK_SPEED_1000MBPS,
|
* %AD_LINK_SPEED_2500MBPS,
|
* %AD_LINK_SPEED_5000MBPS,
|
* %AD_LINK_SPEED_10000MBPS
|
* %AD_LINK_SPEED_14000MBPS,
|
* %AD_LINK_SPEED_20000MBPS
|
* %AD_LINK_SPEED_25000MBPS
|
* %AD_LINK_SPEED_40000MBPS
|
* %AD_LINK_SPEED_50000MBPS
|
* %AD_LINK_SPEED_56000MBPS
|
* %AD_LINK_SPEED_100000MBPS
|
*/
|
static u16 __get_link_speed(struct port *port)
|
{
|
struct slave *slave = port->slave;
|
u16 speed;
|
|
/* this if covers only a special case: when the configuration starts
|
* with link down, it sets the speed to 0.
|
* This is done in spite of the fact that the e100 driver reports 0
|
* to be compatible with MVT in the future.
|
*/
|
if (slave->link != BOND_LINK_UP)
|
speed = 0;
|
else {
|
switch (slave->speed) {
|
case SPEED_10:
|
speed = AD_LINK_SPEED_10MBPS;
|
break;
|
|
case SPEED_100:
|
speed = AD_LINK_SPEED_100MBPS;
|
break;
|
|
case SPEED_1000:
|
speed = AD_LINK_SPEED_1000MBPS;
|
break;
|
|
case SPEED_2500:
|
speed = AD_LINK_SPEED_2500MBPS;
|
break;
|
|
case SPEED_5000:
|
speed = AD_LINK_SPEED_5000MBPS;
|
break;
|
|
case SPEED_10000:
|
speed = AD_LINK_SPEED_10000MBPS;
|
break;
|
|
case SPEED_14000:
|
speed = AD_LINK_SPEED_14000MBPS;
|
break;
|
|
case SPEED_20000:
|
speed = AD_LINK_SPEED_20000MBPS;
|
break;
|
|
case SPEED_25000:
|
speed = AD_LINK_SPEED_25000MBPS;
|
break;
|
|
case SPEED_40000:
|
speed = AD_LINK_SPEED_40000MBPS;
|
break;
|
|
case SPEED_50000:
|
speed = AD_LINK_SPEED_50000MBPS;
|
break;
|
|
case SPEED_56000:
|
speed = AD_LINK_SPEED_56000MBPS;
|
break;
|
|
case SPEED_100000:
|
speed = AD_LINK_SPEED_100000MBPS;
|
break;
|
|
default:
|
/* unknown speed value from ethtool. shouldn't happen */
|
if (slave->speed != SPEED_UNKNOWN)
|
pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n",
|
slave->bond->dev->name,
|
slave->speed,
|
port->actor_port_number);
|
speed = 0;
|
break;
|
}
|
}
|
|
netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
|
port->actor_port_number, speed);
|
return speed;
|
}
|
|
/**
|
* __get_duplex - get a port's duplex
|
* @port: the port we're looking at
|
*
|
* Return @port's duplex in 802.3ad bitmask format. i.e.:
|
* 0x01 if in full duplex
|
* 0x00 otherwise
|
*/
|
static u8 __get_duplex(struct port *port)
|
{
|
struct slave *slave = port->slave;
|
u8 retval = 0x0;
|
|
/* handling a special case: when the configuration starts with
|
* link down, it sets the duplex to 0.
|
*/
|
if (slave->link == BOND_LINK_UP) {
|
switch (slave->duplex) {
|
case DUPLEX_FULL:
|
retval = 0x1;
|
netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
|
port->actor_port_number);
|
break;
|
case DUPLEX_HALF:
|
default:
|
retval = 0x0;
|
netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
|
port->actor_port_number);
|
break;
|
}
|
}
|
return retval;
|
}
|
|
static void __ad_actor_update_port(struct port *port)
|
{
|
const struct bonding *bond = bond_get_bond_by_slave(port->slave);
|
|
port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
|
port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
|
}
|
|
/* Conversions */
|
|
/**
|
* __ad_timer_to_ticks - convert a given timer type to AD module ticks
|
* @timer_type: which timer to operate
|
* @par: timer parameter. see below
|
*
|
* If @timer_type is %current_while_timer, @par indicates long/short timer.
|
* If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
|
* %SLOW_PERIODIC_TIME.
|
*/
|
static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
|
{
|
u16 retval = 0; /* to silence the compiler */
|
|
switch (timer_type) {
|
case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
|
if (par)
|
retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
|
else
|
retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
|
break;
|
case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
|
retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
|
break;
|
case AD_PERIODIC_TIMER: /* for periodic machine */
|
retval = (par*ad_ticks_per_sec); /* long timeout */
|
break;
|
case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
|
retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
|
break;
|
case AD_WAIT_WHILE_TIMER: /* for selection machine */
|
retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
|
break;
|
}
|
|
return retval;
|
}
|
|
|
/* ================= ad_rx_machine helper functions ================== */
|
|
/**
|
* __choose_matched - update a port's matched variable from a received lacpdu
|
* @lacpdu: the lacpdu we've received
|
* @port: the port we're looking at
|
*
|
* Update the value of the matched variable, using parameter values from a
|
* newly received lacpdu. Parameter values for the partner carried in the
|
* received PDU are compared with the corresponding operational parameter
|
* values for the actor. Matched is set to TRUE if all of these parameters
|
* match and the PDU parameter partner_state.aggregation has the same value as
|
* actor_oper_port_state.aggregation and lacp will actively maintain the link
|
* in the aggregation. Matched is also set to TRUE if the value of
|
* actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
|
* an individual link and lacp will actively maintain the link. Otherwise,
|
* matched is set to FALSE. LACP is considered to be actively maintaining the
|
* link if either the PDU's actor_state.lacp_activity variable is TRUE or both
|
* the actor's actor_oper_port_state.lacp_activity and the PDU's
|
* partner_state.lacp_activity variables are TRUE.
|
*
|
* Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
|
* used here to implement the language from 802.3ad 43.4.9 that requires
|
* recordPDU to "match" the LACPDU parameters to the stored values.
|
*/
|
static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
|
{
|
/* check if all parameters are alike
|
* or this is individual link(aggregation == FALSE)
|
* then update the state machine Matched variable.
|
*/
|
if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
|
(ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
|
MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
|
(ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
|
(ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
|
((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
|
((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
|
) {
|
port->sm_vars |= AD_PORT_MATCHED;
|
} else {
|
port->sm_vars &= ~AD_PORT_MATCHED;
|
}
|
}
|
|
/**
|
* __record_pdu - record parameters from a received lacpdu
|
* @lacpdu: the lacpdu we've received
|
* @port: the port we're looking at
|
*
|
* Record the parameter values for the Actor carried in a received lacpdu as
|
* the current partner operational parameter values and sets
|
* actor_oper_port_state.defaulted to FALSE.
|
*/
|
static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
|
{
|
if (lacpdu && port) {
|
struct port_params *partner = &port->partner_oper;
|
|
__choose_matched(lacpdu, port);
|
/* record the new parameter values for the partner
|
* operational
|
*/
|
partner->port_number = ntohs(lacpdu->actor_port);
|
partner->port_priority = ntohs(lacpdu->actor_port_priority);
|
partner->system = lacpdu->actor_system;
|
partner->system_priority = ntohs(lacpdu->actor_system_priority);
|
partner->key = ntohs(lacpdu->actor_key);
|
partner->port_state = lacpdu->actor_state;
|
|
/* set actor_oper_port_state.defaulted to FALSE */
|
port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
|
|
/* set the partner sync. to on if the partner is sync,
|
* and the port is matched
|
*/
|
if ((port->sm_vars & AD_PORT_MATCHED) &&
|
(lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
|
partner->port_state |= AD_STATE_SYNCHRONIZATION;
|
pr_debug("%s partner sync=1\n", port->slave->dev->name);
|
} else {
|
partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
|
pr_debug("%s partner sync=0\n", port->slave->dev->name);
|
}
|
}
|
}
|
|
/**
|
* __record_default - record default parameters
|
* @port: the port we're looking at
|
*
|
* This function records the default parameter values for the partner carried
|
* in the Partner Admin parameters as the current partner operational parameter
|
* values and sets actor_oper_port_state.defaulted to TRUE.
|
*/
|
static void __record_default(struct port *port)
|
{
|
if (port) {
|
/* record the partner admin parameters */
|
memcpy(&port->partner_oper, &port->partner_admin,
|
sizeof(struct port_params));
|
|
/* set actor_oper_port_state.defaulted to true */
|
port->actor_oper_port_state |= AD_STATE_DEFAULTED;
|
}
|
}
|
|
/**
|
* __update_selected - update a port's Selected variable from a received lacpdu
|
* @lacpdu: the lacpdu we've received
|
* @port: the port we're looking at
|
*
|
* Update the value of the selected variable, using parameter values from a
|
* newly received lacpdu. The parameter values for the Actor carried in the
|
* received PDU are compared with the corresponding operational parameter
|
* values for the ports partner. If one or more of the comparisons shows that
|
* the value(s) received in the PDU differ from the current operational values,
|
* then selected is set to FALSE and actor_oper_port_state.synchronization is
|
* set to out_of_sync. Otherwise, selected remains unchanged.
|
*/
|
static void __update_selected(struct lacpdu *lacpdu, struct port *port)
|
{
|
if (lacpdu && port) {
|
const struct port_params *partner = &port->partner_oper;
|
|
/* check if any parameter is different then
|
* update the state machine selected variable.
|
*/
|
if (ntohs(lacpdu->actor_port) != partner->port_number ||
|
ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
|
!MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
|
ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
|
ntohs(lacpdu->actor_key) != partner->key ||
|
(lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
|
port->sm_vars &= ~AD_PORT_SELECTED;
|
}
|
}
|
}
|
|
/**
|
* __update_default_selected - update a port's Selected variable from Partner
|
* @port: the port we're looking at
|
*
|
* This function updates the value of the selected variable, using the partner
|
* administrative parameter values. The administrative values are compared with
|
* the corresponding operational parameter values for the partner. If one or
|
* more of the comparisons shows that the administrative value(s) differ from
|
* the current operational values, then Selected is set to FALSE and
|
* actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
|
* Selected remains unchanged.
|
*/
|
static void __update_default_selected(struct port *port)
|
{
|
if (port) {
|
const struct port_params *admin = &port->partner_admin;
|
const struct port_params *oper = &port->partner_oper;
|
|
/* check if any parameter is different then
|
* update the state machine selected variable.
|
*/
|
if (admin->port_number != oper->port_number ||
|
admin->port_priority != oper->port_priority ||
|
!MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
|
admin->system_priority != oper->system_priority ||
|
admin->key != oper->key ||
|
(admin->port_state & AD_STATE_AGGREGATION)
|
!= (oper->port_state & AD_STATE_AGGREGATION)) {
|
port->sm_vars &= ~AD_PORT_SELECTED;
|
}
|
}
|
}
|
|
/**
|
* __update_ntt - update a port's ntt variable from a received lacpdu
|
* @lacpdu: the lacpdu we've received
|
* @port: the port we're looking at
|
*
|
* Updates the value of the ntt variable, using parameter values from a newly
|
* received lacpdu. The parameter values for the partner carried in the
|
* received PDU are compared with the corresponding operational parameter
|
* values for the Actor. If one or more of the comparisons shows that the
|
* value(s) received in the PDU differ from the current operational values,
|
* then ntt is set to TRUE. Otherwise, ntt remains unchanged.
|
*/
|
static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
|
{
|
/* validate lacpdu and port */
|
if (lacpdu && port) {
|
/* check if any parameter is different then
|
* update the port->ntt.
|
*/
|
if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
|
(ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
|
!MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
|
(ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
|
(ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
|
((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
|
((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
|
((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
|
((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
|
) {
|
port->ntt = true;
|
}
|
}
|
}
|
|
/**
|
* __agg_ports_are_ready - check if all ports in an aggregator are ready
|
* @aggregator: the aggregator we're looking at
|
*
|
*/
|
static int __agg_ports_are_ready(struct aggregator *aggregator)
|
{
|
struct port *port;
|
int retval = 1;
|
|
if (aggregator) {
|
/* scan all ports in this aggregator to verfy if they are
|
* all ready.
|
*/
|
for (port = aggregator->lag_ports;
|
port;
|
port = port->next_port_in_aggregator) {
|
if (!(port->sm_vars & AD_PORT_READY_N)) {
|
retval = 0;
|
break;
|
}
|
}
|
}
|
|
return retval;
|
}
|
|
/**
|
* __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
|
* @aggregator: the aggregator we're looking at
|
* @val: Should the ports' ready bit be set on or off
|
*
|
*/
|
static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
|
{
|
struct port *port;
|
|
for (port = aggregator->lag_ports; port;
|
port = port->next_port_in_aggregator) {
|
if (val)
|
port->sm_vars |= AD_PORT_READY;
|
else
|
port->sm_vars &= ~AD_PORT_READY;
|
}
|
}
|
|
static int __agg_active_ports(struct aggregator *agg)
|
{
|
struct port *port;
|
int active = 0;
|
|
for (port = agg->lag_ports; port;
|
port = port->next_port_in_aggregator) {
|
if (port->is_enabled)
|
active++;
|
}
|
|
return active;
|
}
|
|
/**
|
* __get_agg_bandwidth - get the total bandwidth of an aggregator
|
* @aggregator: the aggregator we're looking at
|
*
|
*/
|
static u32 __get_agg_bandwidth(struct aggregator *aggregator)
|
{
|
int nports = __agg_active_ports(aggregator);
|
u32 bandwidth = 0;
|
|
if (nports) {
|
switch (__get_link_speed(aggregator->lag_ports)) {
|
case AD_LINK_SPEED_1MBPS:
|
bandwidth = nports;
|
break;
|
case AD_LINK_SPEED_10MBPS:
|
bandwidth = nports * 10;
|
break;
|
case AD_LINK_SPEED_100MBPS:
|
bandwidth = nports * 100;
|
break;
|
case AD_LINK_SPEED_1000MBPS:
|
bandwidth = nports * 1000;
|
break;
|
case AD_LINK_SPEED_2500MBPS:
|
bandwidth = nports * 2500;
|
break;
|
case AD_LINK_SPEED_5000MBPS:
|
bandwidth = nports * 5000;
|
break;
|
case AD_LINK_SPEED_10000MBPS:
|
bandwidth = nports * 10000;
|
break;
|
case AD_LINK_SPEED_14000MBPS:
|
bandwidth = nports * 14000;
|
break;
|
case AD_LINK_SPEED_20000MBPS:
|
bandwidth = nports * 20000;
|
break;
|
case AD_LINK_SPEED_25000MBPS:
|
bandwidth = nports * 25000;
|
break;
|
case AD_LINK_SPEED_40000MBPS:
|
bandwidth = nports * 40000;
|
break;
|
case AD_LINK_SPEED_50000MBPS:
|
bandwidth = nports * 50000;
|
break;
|
case AD_LINK_SPEED_56000MBPS:
|
bandwidth = nports * 56000;
|
break;
|
case AD_LINK_SPEED_100000MBPS:
|
bandwidth = nports * 100000;
|
break;
|
default:
|
bandwidth = 0; /* to silence the compiler */
|
}
|
}
|
return bandwidth;
|
}
|
|
/**
|
* __get_active_agg - get the current active aggregator
|
* @aggregator: the aggregator we're looking at
|
*
|
* Caller must hold RCU lock.
|
*/
|
static struct aggregator *__get_active_agg(struct aggregator *aggregator)
|
{
|
struct bonding *bond = aggregator->slave->bond;
|
struct list_head *iter;
|
struct slave *slave;
|
|
bond_for_each_slave_rcu(bond, slave, iter)
|
if (SLAVE_AD_INFO(slave)->aggregator.is_active)
|
return &(SLAVE_AD_INFO(slave)->aggregator);
|
|
return NULL;
|
}
|
|
/**
|
* __update_lacpdu_from_port - update a port's lacpdu fields
|
* @port: the port we're looking at
|
*/
|
static inline void __update_lacpdu_from_port(struct port *port)
|
{
|
struct lacpdu *lacpdu = &port->lacpdu;
|
const struct port_params *partner = &port->partner_oper;
|
|
/* update current actual Actor parameters
|
* lacpdu->subtype initialized
|
* lacpdu->version_number initialized
|
* lacpdu->tlv_type_actor_info initialized
|
* lacpdu->actor_information_length initialized
|
*/
|
|
lacpdu->actor_system_priority = htons(port->actor_system_priority);
|
lacpdu->actor_system = port->actor_system;
|
lacpdu->actor_key = htons(port->actor_oper_port_key);
|
lacpdu->actor_port_priority = htons(port->actor_port_priority);
|
lacpdu->actor_port = htons(port->actor_port_number);
|
lacpdu->actor_state = port->actor_oper_port_state;
|
pr_debug("update lacpdu: %s, actor port state %x\n",
|
port->slave->dev->name, port->actor_oper_port_state);
|
|
/* lacpdu->reserved_3_1 initialized
|
* lacpdu->tlv_type_partner_info initialized
|
* lacpdu->partner_information_length initialized
|
*/
|
|
lacpdu->partner_system_priority = htons(partner->system_priority);
|
lacpdu->partner_system = partner->system;
|
lacpdu->partner_key = htons(partner->key);
|
lacpdu->partner_port_priority = htons(partner->port_priority);
|
lacpdu->partner_port = htons(partner->port_number);
|
lacpdu->partner_state = partner->port_state;
|
|
/* lacpdu->reserved_3_2 initialized
|
* lacpdu->tlv_type_collector_info initialized
|
* lacpdu->collector_information_length initialized
|
* collector_max_delay initialized
|
* reserved_12[12] initialized
|
* tlv_type_terminator initialized
|
* terminator_length initialized
|
* reserved_50[50] initialized
|
*/
|
}
|
|
/* ================= main 802.3ad protocol code ========================= */
|
|
/**
|
* ad_lacpdu_send - send out a lacpdu packet on a given port
|
* @port: the port we're looking at
|
*
|
* Returns: 0 on success
|
* < 0 on error
|
*/
|
static int ad_lacpdu_send(struct port *port)
|
{
|
struct slave *slave = port->slave;
|
struct sk_buff *skb;
|
struct lacpdu_header *lacpdu_header;
|
int length = sizeof(struct lacpdu_header);
|
|
skb = dev_alloc_skb(length);
|
if (!skb)
|
return -ENOMEM;
|
|
skb->dev = slave->dev;
|
skb_reset_mac_header(skb);
|
skb->network_header = skb->mac_header + ETH_HLEN;
|
skb->protocol = PKT_TYPE_LACPDU;
|
skb->priority = TC_PRIO_CONTROL;
|
|
lacpdu_header = skb_put(skb, length);
|
|
ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
|
/* Note: source address is set to be the member's PERMANENT address,
|
* because we use it to identify loopback lacpdus in receive.
|
*/
|
ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
|
lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
|
|
lacpdu_header->lacpdu = port->lacpdu;
|
|
dev_queue_xmit(skb);
|
|
return 0;
|
}
|
|
/**
|
* ad_marker_send - send marker information/response on a given port
|
* @port: the port we're looking at
|
* @marker: marker data to send
|
*
|
* Returns: 0 on success
|
* < 0 on error
|
*/
|
static int ad_marker_send(struct port *port, struct bond_marker *marker)
|
{
|
struct slave *slave = port->slave;
|
struct sk_buff *skb;
|
struct bond_marker_header *marker_header;
|
int length = sizeof(struct bond_marker_header);
|
|
skb = dev_alloc_skb(length + 16);
|
if (!skb)
|
return -ENOMEM;
|
|
skb_reserve(skb, 16);
|
|
skb->dev = slave->dev;
|
skb_reset_mac_header(skb);
|
skb->network_header = skb->mac_header + ETH_HLEN;
|
skb->protocol = PKT_TYPE_LACPDU;
|
|
marker_header = skb_put(skb, length);
|
|
ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
|
/* Note: source address is set to be the member's PERMANENT address,
|
* because we use it to identify loopback MARKERs in receive.
|
*/
|
ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
|
marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
|
|
marker_header->marker = *marker;
|
|
dev_queue_xmit(skb);
|
|
return 0;
|
}
|
|
/**
|
* ad_mux_machine - handle a port's mux state machine
|
* @port: the port we're looking at
|
* @update_slave_arr: Does slave array need update?
|
*/
|
static void ad_mux_machine(struct port *port, bool *update_slave_arr)
|
{
|
mux_states_t last_state;
|
|
/* keep current State Machine state to compare later if it was
|
* changed
|
*/
|
last_state = port->sm_mux_state;
|
|
if (port->sm_vars & AD_PORT_BEGIN) {
|
port->sm_mux_state = AD_MUX_DETACHED;
|
} else {
|
switch (port->sm_mux_state) {
|
case AD_MUX_DETACHED:
|
if ((port->sm_vars & AD_PORT_SELECTED)
|
|| (port->sm_vars & AD_PORT_STANDBY))
|
/* if SELECTED or STANDBY */
|
port->sm_mux_state = AD_MUX_WAITING;
|
break;
|
case AD_MUX_WAITING:
|
/* if SELECTED == FALSE return to DETACH state */
|
if (!(port->sm_vars & AD_PORT_SELECTED)) {
|
port->sm_vars &= ~AD_PORT_READY_N;
|
/* in order to withhold the Selection Logic to
|
* check all ports READY_N value every callback
|
* cycle to update ready variable, we check
|
* READY_N and update READY here
|
*/
|
__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
|
port->sm_mux_state = AD_MUX_DETACHED;
|
break;
|
}
|
|
/* check if the wait_while_timer expired */
|
if (port->sm_mux_timer_counter
|
&& !(--port->sm_mux_timer_counter))
|
port->sm_vars |= AD_PORT_READY_N;
|
|
/* in order to withhold the selection logic to check
|
* all ports READY_N value every callback cycle to
|
* update ready variable, we check READY_N and update
|
* READY here
|
*/
|
__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
|
|
/* if the wait_while_timer expired, and the port is
|
* in READY state, move to ATTACHED state
|
*/
|
if ((port->sm_vars & AD_PORT_READY)
|
&& !port->sm_mux_timer_counter)
|
port->sm_mux_state = AD_MUX_ATTACHED;
|
break;
|
case AD_MUX_ATTACHED:
|
/* check also if agg_select_timer expired (so the
|
* edable port will take place only after this timer)
|
*/
|
if ((port->sm_vars & AD_PORT_SELECTED) &&
|
(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
|
!__check_agg_selection_timer(port)) {
|
if (port->aggregator->is_active)
|
port->sm_mux_state =
|
AD_MUX_COLLECTING_DISTRIBUTING;
|
} else if (!(port->sm_vars & AD_PORT_SELECTED) ||
|
(port->sm_vars & AD_PORT_STANDBY)) {
|
/* if UNSELECTED or STANDBY */
|
port->sm_vars &= ~AD_PORT_READY_N;
|
/* in order to withhold the selection logic to
|
* check all ports READY_N value every callback
|
* cycle to update ready variable, we check
|
* READY_N and update READY here
|
*/
|
__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
|
port->sm_mux_state = AD_MUX_DETACHED;
|
} else if (port->aggregator->is_active) {
|
port->actor_oper_port_state |=
|
AD_STATE_SYNCHRONIZATION;
|
}
|
break;
|
case AD_MUX_COLLECTING_DISTRIBUTING:
|
if (!(port->sm_vars & AD_PORT_SELECTED) ||
|
(port->sm_vars & AD_PORT_STANDBY) ||
|
!(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
|
!(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
|
port->sm_mux_state = AD_MUX_ATTACHED;
|
} else {
|
/* if port state hasn't changed make
|
* sure that a collecting distributing
|
* port in an active aggregator is enabled
|
*/
|
if (port->aggregator &&
|
port->aggregator->is_active &&
|
!__port_is_enabled(port)) {
|
__enable_port(port);
|
*update_slave_arr = true;
|
}
|
}
|
break;
|
default:
|
break;
|
}
|
}
|
|
/* check if the state machine was changed */
|
if (port->sm_mux_state != last_state) {
|
pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
|
port->actor_port_number,
|
port->slave->dev->name,
|
last_state,
|
port->sm_mux_state);
|
switch (port->sm_mux_state) {
|
case AD_MUX_DETACHED:
|
port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
|
ad_disable_collecting_distributing(port,
|
update_slave_arr);
|
port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
|
port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
|
port->ntt = true;
|
break;
|
case AD_MUX_WAITING:
|
port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
|
break;
|
case AD_MUX_ATTACHED:
|
if (port->aggregator->is_active)
|
port->actor_oper_port_state |=
|
AD_STATE_SYNCHRONIZATION;
|
else
|
port->actor_oper_port_state &=
|
~AD_STATE_SYNCHRONIZATION;
|
port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
|
port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
|
ad_disable_collecting_distributing(port,
|
update_slave_arr);
|
port->ntt = true;
|
break;
|
case AD_MUX_COLLECTING_DISTRIBUTING:
|
port->actor_oper_port_state |= AD_STATE_COLLECTING;
|
port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
|
port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
|
ad_enable_collecting_distributing(port,
|
update_slave_arr);
|
port->ntt = true;
|
break;
|
default:
|
break;
|
}
|
}
|
}
|
|
/**
|
* ad_rx_machine - handle a port's rx State Machine
|
* @lacpdu: the lacpdu we've received
|
* @port: the port we're looking at
|
*
|
* If lacpdu arrived, stop previous timer (if exists) and set the next state as
|
* CURRENT. If timer expired set the state machine in the proper state.
|
* In other cases, this function checks if we need to switch to other state.
|
*/
|
static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
|
{
|
rx_states_t last_state;
|
|
/* keep current State Machine state to compare later if it was
|
* changed
|
*/
|
last_state = port->sm_rx_state;
|
|
/* check if state machine should change state */
|
|
/* first, check if port was reinitialized */
|
if (port->sm_vars & AD_PORT_BEGIN) {
|
port->sm_rx_state = AD_RX_INITIALIZE;
|
port->sm_vars |= AD_PORT_CHURNED;
|
/* check if port is not enabled */
|
} else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
|
port->sm_rx_state = AD_RX_PORT_DISABLED;
|
/* check if new lacpdu arrived */
|
else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
|
(port->sm_rx_state == AD_RX_DEFAULTED) ||
|
(port->sm_rx_state == AD_RX_CURRENT))) {
|
if (port->sm_rx_state != AD_RX_CURRENT)
|
port->sm_vars |= AD_PORT_CHURNED;
|
port->sm_rx_timer_counter = 0;
|
port->sm_rx_state = AD_RX_CURRENT;
|
} else {
|
/* if timer is on, and if it is expired */
|
if (port->sm_rx_timer_counter &&
|
!(--port->sm_rx_timer_counter)) {
|
switch (port->sm_rx_state) {
|
case AD_RX_EXPIRED:
|
port->sm_rx_state = AD_RX_DEFAULTED;
|
break;
|
case AD_RX_CURRENT:
|
port->sm_rx_state = AD_RX_EXPIRED;
|
break;
|
default:
|
break;
|
}
|
} else {
|
/* if no lacpdu arrived and no timer is on */
|
switch (port->sm_rx_state) {
|
case AD_RX_PORT_DISABLED:
|
if (port->is_enabled &&
|
(port->sm_vars & AD_PORT_LACP_ENABLED))
|
port->sm_rx_state = AD_RX_EXPIRED;
|
else if (port->is_enabled
|
&& ((port->sm_vars
|
& AD_PORT_LACP_ENABLED) == 0))
|
port->sm_rx_state = AD_RX_LACP_DISABLED;
|
break;
|
default:
|
break;
|
|
}
|
}
|
}
|
|
/* check if the State machine was changed or new lacpdu arrived */
|
if ((port->sm_rx_state != last_state) || (lacpdu)) {
|
pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
|
port->actor_port_number,
|
port->slave->dev->name,
|
last_state,
|
port->sm_rx_state);
|
switch (port->sm_rx_state) {
|
case AD_RX_INITIALIZE:
|
if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
|
port->sm_vars &= ~AD_PORT_LACP_ENABLED;
|
else
|
port->sm_vars |= AD_PORT_LACP_ENABLED;
|
port->sm_vars &= ~AD_PORT_SELECTED;
|
__record_default(port);
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
port->sm_rx_state = AD_RX_PORT_DISABLED;
|
|
/* Fall Through */
|
case AD_RX_PORT_DISABLED:
|
port->sm_vars &= ~AD_PORT_MATCHED;
|
break;
|
case AD_RX_LACP_DISABLED:
|
port->sm_vars &= ~AD_PORT_SELECTED;
|
__record_default(port);
|
port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
|
port->sm_vars |= AD_PORT_MATCHED;
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
break;
|
case AD_RX_EXPIRED:
|
/* Reset of the Synchronization flag (Standard 43.4.12)
|
* This reset cause to disable this port in the
|
* COLLECTING_DISTRIBUTING state of the mux machine in
|
* case of EXPIRED even if LINK_DOWN didn't arrive for
|
* the port.
|
*/
|
port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
|
port->sm_vars &= ~AD_PORT_MATCHED;
|
port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
|
port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
|
port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
|
port->actor_oper_port_state |= AD_STATE_EXPIRED;
|
port->sm_vars |= AD_PORT_CHURNED;
|
break;
|
case AD_RX_DEFAULTED:
|
__update_default_selected(port);
|
__record_default(port);
|
port->sm_vars |= AD_PORT_MATCHED;
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
break;
|
case AD_RX_CURRENT:
|
/* detect loopback situation */
|
if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
|
&(port->actor_system))) {
|
netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
|
"Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
|
port->slave->dev->name);
|
return;
|
}
|
__update_selected(lacpdu, port);
|
__update_ntt(lacpdu, port);
|
__record_pdu(lacpdu, port);
|
port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
|
port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
|
break;
|
default:
|
break;
|
}
|
}
|
}
|
|
/**
|
* ad_churn_machine - handle port churn's state machine
|
* @port: the port we're looking at
|
*
|
*/
|
static void ad_churn_machine(struct port *port)
|
{
|
if (port->sm_vars & AD_PORT_CHURNED) {
|
port->sm_vars &= ~AD_PORT_CHURNED;
|
port->sm_churn_actor_state = AD_CHURN_MONITOR;
|
port->sm_churn_partner_state = AD_CHURN_MONITOR;
|
port->sm_churn_actor_timer_counter =
|
__ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
|
port->sm_churn_partner_timer_counter =
|
__ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
|
return;
|
}
|
if (port->sm_churn_actor_timer_counter &&
|
!(--port->sm_churn_actor_timer_counter) &&
|
port->sm_churn_actor_state == AD_CHURN_MONITOR) {
|
if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
|
port->sm_churn_actor_state = AD_NO_CHURN;
|
} else {
|
port->churn_actor_count++;
|
port->sm_churn_actor_state = AD_CHURN;
|
}
|
}
|
if (port->sm_churn_partner_timer_counter &&
|
!(--port->sm_churn_partner_timer_counter) &&
|
port->sm_churn_partner_state == AD_CHURN_MONITOR) {
|
if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
|
port->sm_churn_partner_state = AD_NO_CHURN;
|
} else {
|
port->churn_partner_count++;
|
port->sm_churn_partner_state = AD_CHURN;
|
}
|
}
|
}
|
|
/**
|
* ad_tx_machine - handle a port's tx state machine
|
* @port: the port we're looking at
|
*/
|
static void ad_tx_machine(struct port *port)
|
{
|
/* check if tx timer expired, to verify that we do not send more than
|
* 3 packets per second
|
*/
|
if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
|
/* check if there is something to send */
|
if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
|
__update_lacpdu_from_port(port);
|
|
if (ad_lacpdu_send(port) >= 0) {
|
pr_debug("Sent LACPDU on port %d\n",
|
port->actor_port_number);
|
|
/* mark ntt as false, so it will not be sent
|
* again until demanded
|
*/
|
port->ntt = false;
|
}
|
}
|
/* restart tx timer(to verify that we will not exceed
|
* AD_MAX_TX_IN_SECOND
|
*/
|
port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
|
}
|
}
|
|
/**
|
* ad_periodic_machine - handle a port's periodic state machine
|
* @port: the port we're looking at
|
*
|
* Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
|
*/
|
static void ad_periodic_machine(struct port *port)
|
{
|
periodic_states_t last_state;
|
|
/* keep current state machine state to compare later if it was changed */
|
last_state = port->sm_periodic_state;
|
|
/* check if port was reinitialized */
|
if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
|
(!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
|
) {
|
port->sm_periodic_state = AD_NO_PERIODIC;
|
}
|
/* check if state machine should change state */
|
else if (port->sm_periodic_timer_counter) {
|
/* check if periodic state machine expired */
|
if (!(--port->sm_periodic_timer_counter)) {
|
/* if expired then do tx */
|
port->sm_periodic_state = AD_PERIODIC_TX;
|
} else {
|
/* If not expired, check if there is some new timeout
|
* parameter from the partner state
|
*/
|
switch (port->sm_periodic_state) {
|
case AD_FAST_PERIODIC:
|
if (!(port->partner_oper.port_state
|
& AD_STATE_LACP_TIMEOUT))
|
port->sm_periodic_state = AD_SLOW_PERIODIC;
|
break;
|
case AD_SLOW_PERIODIC:
|
if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
|
port->sm_periodic_timer_counter = 0;
|
port->sm_periodic_state = AD_PERIODIC_TX;
|
}
|
break;
|
default:
|
break;
|
}
|
}
|
} else {
|
switch (port->sm_periodic_state) {
|
case AD_NO_PERIODIC:
|
port->sm_periodic_state = AD_FAST_PERIODIC;
|
break;
|
case AD_PERIODIC_TX:
|
if (!(port->partner_oper.port_state &
|
AD_STATE_LACP_TIMEOUT))
|
port->sm_periodic_state = AD_SLOW_PERIODIC;
|
else
|
port->sm_periodic_state = AD_FAST_PERIODIC;
|
break;
|
default:
|
break;
|
}
|
}
|
|
/* check if the state machine was changed */
|
if (port->sm_periodic_state != last_state) {
|
pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
|
port->actor_port_number, last_state,
|
port->sm_periodic_state);
|
switch (port->sm_periodic_state) {
|
case AD_NO_PERIODIC:
|
port->sm_periodic_timer_counter = 0;
|
break;
|
case AD_FAST_PERIODIC:
|
/* decrement 1 tick we lost in the PERIODIC_TX cycle */
|
port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
|
break;
|
case AD_SLOW_PERIODIC:
|
/* decrement 1 tick we lost in the PERIODIC_TX cycle */
|
port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
|
break;
|
case AD_PERIODIC_TX:
|
port->ntt = true;
|
break;
|
default:
|
break;
|
}
|
}
|
}
|
|
/**
|
* ad_port_selection_logic - select aggregation groups
|
* @port: the port we're looking at
|
* @update_slave_arr: Does slave array need update?
|
*
|
* Select aggregation groups, and assign each port for it's aggregetor. The
|
* selection logic is called in the inititalization (after all the handshkes),
|
* and after every lacpdu receive (if selected is off).
|
*/
|
static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
|
{
|
struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
|
struct port *last_port = NULL, *curr_port;
|
struct list_head *iter;
|
struct bonding *bond;
|
struct slave *slave;
|
int found = 0;
|
|
/* if the port is already Selected, do nothing */
|
if (port->sm_vars & AD_PORT_SELECTED)
|
return;
|
|
bond = __get_bond_by_port(port);
|
|
/* if the port is connected to other aggregator, detach it */
|
if (port->aggregator) {
|
/* detach the port from its former aggregator */
|
temp_aggregator = port->aggregator;
|
for (curr_port = temp_aggregator->lag_ports; curr_port;
|
last_port = curr_port,
|
curr_port = curr_port->next_port_in_aggregator) {
|
if (curr_port == port) {
|
temp_aggregator->num_of_ports--;
|
/* if it is the first port attached to the
|
* aggregator
|
*/
|
if (!last_port) {
|
temp_aggregator->lag_ports =
|
port->next_port_in_aggregator;
|
} else {
|
/* not the first port attached to the
|
* aggregator
|
*/
|
last_port->next_port_in_aggregator =
|
port->next_port_in_aggregator;
|
}
|
|
/* clear the port's relations to this
|
* aggregator
|
*/
|
port->aggregator = NULL;
|
port->next_port_in_aggregator = NULL;
|
port->actor_port_aggregator_identifier = 0;
|
|
netdev_dbg(bond->dev, "Port %d left LAG %d\n",
|
port->actor_port_number,
|
temp_aggregator->aggregator_identifier);
|
/* if the aggregator is empty, clear its
|
* parameters, and set it ready to be attached
|
*/
|
if (!temp_aggregator->lag_ports)
|
ad_clear_agg(temp_aggregator);
|
break;
|
}
|
}
|
if (!curr_port) {
|
/* meaning: the port was related to an aggregator
|
* but was not on the aggregator port list
|
*/
|
net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
|
port->slave->bond->dev->name,
|
port->actor_port_number,
|
port->slave->dev->name,
|
port->aggregator->aggregator_identifier);
|
}
|
}
|
/* search on all aggregators for a suitable aggregator for this port */
|
bond_for_each_slave(bond, slave, iter) {
|
aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
|
|
/* keep a free aggregator for later use(if needed) */
|
if (!aggregator->lag_ports) {
|
if (!free_aggregator)
|
free_aggregator = aggregator;
|
continue;
|
}
|
/* check if current aggregator suits us */
|
if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
|
MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
|
(aggregator->partner_system_priority == port->partner_oper.system_priority) &&
|
(aggregator->partner_oper_aggregator_key == port->partner_oper.key)
|
) &&
|
((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
|
!aggregator->is_individual) /* but is not individual OR */
|
)
|
) {
|
/* attach to the founded aggregator */
|
port->aggregator = aggregator;
|
port->actor_port_aggregator_identifier =
|
port->aggregator->aggregator_identifier;
|
port->next_port_in_aggregator = aggregator->lag_ports;
|
port->aggregator->num_of_ports++;
|
aggregator->lag_ports = port;
|
netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
|
port->actor_port_number,
|
port->aggregator->aggregator_identifier);
|
|
/* mark this port as selected */
|
port->sm_vars |= AD_PORT_SELECTED;
|
found = 1;
|
break;
|
}
|
}
|
|
/* the port couldn't find an aggregator - attach it to a new
|
* aggregator
|
*/
|
if (!found) {
|
if (free_aggregator) {
|
/* assign port a new aggregator */
|
port->aggregator = free_aggregator;
|
port->actor_port_aggregator_identifier =
|
port->aggregator->aggregator_identifier;
|
|
/* update the new aggregator's parameters
|
* if port was responsed from the end-user
|
*/
|
if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
|
/* if port is full duplex */
|
port->aggregator->is_individual = false;
|
else
|
port->aggregator->is_individual = true;
|
|
port->aggregator->actor_admin_aggregator_key =
|
port->actor_admin_port_key;
|
port->aggregator->actor_oper_aggregator_key =
|
port->actor_oper_port_key;
|
port->aggregator->partner_system =
|
port->partner_oper.system;
|
port->aggregator->partner_system_priority =
|
port->partner_oper.system_priority;
|
port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
|
port->aggregator->receive_state = 1;
|
port->aggregator->transmit_state = 1;
|
port->aggregator->lag_ports = port;
|
port->aggregator->num_of_ports++;
|
|
/* mark this port as selected */
|
port->sm_vars |= AD_PORT_SELECTED;
|
|
netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
|
port->actor_port_number,
|
port->aggregator->aggregator_identifier);
|
} else {
|
netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
|
port->actor_port_number, port->slave->dev->name);
|
}
|
}
|
/* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
|
* in all aggregator's ports, else set ready=FALSE in all
|
* aggregator's ports
|
*/
|
__set_agg_ports_ready(port->aggregator,
|
__agg_ports_are_ready(port->aggregator));
|
|
aggregator = __get_first_agg(port);
|
ad_agg_selection_logic(aggregator, update_slave_arr);
|
|
if (!port->aggregator->is_active)
|
port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
|
}
|
|
/* Decide if "agg" is a better choice for the new active aggregator that
|
* the current best, according to the ad_select policy.
|
*/
|
static struct aggregator *ad_agg_selection_test(struct aggregator *best,
|
struct aggregator *curr)
|
{
|
/* 0. If no best, select current.
|
*
|
* 1. If the current agg is not individual, and the best is
|
* individual, select current.
|
*
|
* 2. If current agg is individual and the best is not, keep best.
|
*
|
* 3. Therefore, current and best are both individual or both not
|
* individual, so:
|
*
|
* 3a. If current agg partner replied, and best agg partner did not,
|
* select current.
|
*
|
* 3b. If current agg partner did not reply and best agg partner
|
* did reply, keep best.
|
*
|
* 4. Therefore, current and best both have partner replies or
|
* both do not, so perform selection policy:
|
*
|
* BOND_AD_COUNT: Select by count of ports. If count is equal,
|
* select by bandwidth.
|
*
|
* BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
|
*/
|
if (!best)
|
return curr;
|
|
if (!curr->is_individual && best->is_individual)
|
return curr;
|
|
if (curr->is_individual && !best->is_individual)
|
return best;
|
|
if (__agg_has_partner(curr) && !__agg_has_partner(best))
|
return curr;
|
|
if (!__agg_has_partner(curr) && __agg_has_partner(best))
|
return best;
|
|
switch (__get_agg_selection_mode(curr->lag_ports)) {
|
case BOND_AD_COUNT:
|
if (__agg_active_ports(curr) > __agg_active_ports(best))
|
return curr;
|
|
if (__agg_active_ports(curr) < __agg_active_ports(best))
|
return best;
|
|
/*FALLTHROUGH*/
|
case BOND_AD_STABLE:
|
case BOND_AD_BANDWIDTH:
|
if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
|
return curr;
|
|
break;
|
|
default:
|
net_warn_ratelimited("%s: Impossible agg select mode %d\n",
|
curr->slave->bond->dev->name,
|
__get_agg_selection_mode(curr->lag_ports));
|
break;
|
}
|
|
return best;
|
}
|
|
static int agg_device_up(const struct aggregator *agg)
|
{
|
struct port *port = agg->lag_ports;
|
|
if (!port)
|
return 0;
|
|
for (port = agg->lag_ports; port;
|
port = port->next_port_in_aggregator) {
|
if (netif_running(port->slave->dev) &&
|
netif_carrier_ok(port->slave->dev))
|
return 1;
|
}
|
|
return 0;
|
}
|
|
/**
|
* ad_agg_selection_logic - select an aggregation group for a team
|
* @aggregator: the aggregator we're looking at
|
* @update_slave_arr: Does slave array need update?
|
*
|
* It is assumed that only one aggregator may be selected for a team.
|
*
|
* The logic of this function is to select the aggregator according to
|
* the ad_select policy:
|
*
|
* BOND_AD_STABLE: select the aggregator with the most ports attached to
|
* it, and to reselect the active aggregator only if the previous
|
* aggregator has no more ports related to it.
|
*
|
* BOND_AD_BANDWIDTH: select the aggregator with the highest total
|
* bandwidth, and reselect whenever a link state change takes place or the
|
* set of slaves in the bond changes.
|
*
|
* BOND_AD_COUNT: select the aggregator with largest number of ports
|
* (slaves), and reselect whenever a link state change takes place or the
|
* set of slaves in the bond changes.
|
*
|
* FIXME: this function MUST be called with the first agg in the bond, or
|
* __get_active_agg() won't work correctly. This function should be better
|
* called with the bond itself, and retrieve the first agg from it.
|
*/
|
static void ad_agg_selection_logic(struct aggregator *agg,
|
bool *update_slave_arr)
|
{
|
struct aggregator *best, *active, *origin;
|
struct bonding *bond = agg->slave->bond;
|
struct list_head *iter;
|
struct slave *slave;
|
struct port *port;
|
|
rcu_read_lock();
|
origin = agg;
|
active = __get_active_agg(agg);
|
best = (active && agg_device_up(active)) ? active : NULL;
|
|
bond_for_each_slave_rcu(bond, slave, iter) {
|
agg = &(SLAVE_AD_INFO(slave)->aggregator);
|
|
agg->is_active = 0;
|
|
if (__agg_active_ports(agg) && agg_device_up(agg))
|
best = ad_agg_selection_test(best, agg);
|
}
|
|
if (best &&
|
__get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
|
/* For the STABLE policy, don't replace the old active
|
* aggregator if it's still active (it has an answering
|
* partner) or if both the best and active don't have an
|
* answering partner.
|
*/
|
if (active && active->lag_ports &&
|
__agg_active_ports(active) &&
|
(__agg_has_partner(active) ||
|
(!__agg_has_partner(active) &&
|
!__agg_has_partner(best)))) {
|
if (!(!active->actor_oper_aggregator_key &&
|
best->actor_oper_aggregator_key)) {
|
best = NULL;
|
active->is_active = 1;
|
}
|
}
|
}
|
|
if (best && (best == active)) {
|
best = NULL;
|
active->is_active = 1;
|
}
|
|
/* if there is new best aggregator, activate it */
|
if (best) {
|
netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
|
best->aggregator_identifier, best->num_of_ports,
|
best->actor_oper_aggregator_key,
|
best->partner_oper_aggregator_key,
|
best->is_individual, best->is_active);
|
netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
|
best->lag_ports, best->slave,
|
best->slave ? best->slave->dev->name : "NULL");
|
|
bond_for_each_slave_rcu(bond, slave, iter) {
|
agg = &(SLAVE_AD_INFO(slave)->aggregator);
|
|
netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
|
agg->aggregator_identifier, agg->num_of_ports,
|
agg->actor_oper_aggregator_key,
|
agg->partner_oper_aggregator_key,
|
agg->is_individual, agg->is_active);
|
}
|
|
/* check if any partner replys */
|
if (best->is_individual) {
|
net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
|
best->slave ?
|
best->slave->bond->dev->name : "NULL");
|
}
|
|
best->is_active = 1;
|
netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
|
best->aggregator_identifier);
|
netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
|
best->aggregator_identifier, best->num_of_ports,
|
best->actor_oper_aggregator_key,
|
best->partner_oper_aggregator_key,
|
best->is_individual, best->is_active);
|
|
/* disable the ports that were related to the former
|
* active_aggregator
|
*/
|
if (active) {
|
for (port = active->lag_ports; port;
|
port = port->next_port_in_aggregator) {
|
__disable_port(port);
|
}
|
}
|
/* Slave array needs update. */
|
*update_slave_arr = true;
|
}
|
|
/* if the selected aggregator is of join individuals
|
* (partner_system is NULL), enable their ports
|
*/
|
active = __get_active_agg(origin);
|
|
if (active) {
|
if (!__agg_has_partner(active)) {
|
for (port = active->lag_ports; port;
|
port = port->next_port_in_aggregator) {
|
__enable_port(port);
|
}
|
*update_slave_arr = true;
|
}
|
}
|
|
rcu_read_unlock();
|
|
bond_3ad_set_carrier(bond);
|
}
|
|
/**
|
* ad_clear_agg - clear a given aggregator's parameters
|
* @aggregator: the aggregator we're looking at
|
*/
|
static void ad_clear_agg(struct aggregator *aggregator)
|
{
|
if (aggregator) {
|
aggregator->is_individual = false;
|
aggregator->actor_admin_aggregator_key = 0;
|
aggregator->actor_oper_aggregator_key = 0;
|
eth_zero_addr(aggregator->partner_system.mac_addr_value);
|
aggregator->partner_system_priority = 0;
|
aggregator->partner_oper_aggregator_key = 0;
|
aggregator->receive_state = 0;
|
aggregator->transmit_state = 0;
|
aggregator->lag_ports = NULL;
|
aggregator->is_active = 0;
|
aggregator->num_of_ports = 0;
|
pr_debug("LAG %d was cleared\n",
|
aggregator->aggregator_identifier);
|
}
|
}
|
|
/**
|
* ad_initialize_agg - initialize a given aggregator's parameters
|
* @aggregator: the aggregator we're looking at
|
*/
|
static void ad_initialize_agg(struct aggregator *aggregator)
|
{
|
if (aggregator) {
|
ad_clear_agg(aggregator);
|
|
eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
|
aggregator->aggregator_identifier = 0;
|
aggregator->slave = NULL;
|
}
|
}
|
|
/**
|
* ad_initialize_port - initialize a given port's parameters
|
* @aggregator: the aggregator we're looking at
|
* @lacp_fast: boolean. whether fast periodic should be used
|
*/
|
static void ad_initialize_port(struct port *port, int lacp_fast)
|
{
|
static const struct port_params tmpl = {
|
.system_priority = 0xffff,
|
.key = 1,
|
.port_number = 1,
|
.port_priority = 0xff,
|
.port_state = 1,
|
};
|
static const struct lacpdu lacpdu = {
|
.subtype = 0x01,
|
.version_number = 0x01,
|
.tlv_type_actor_info = 0x01,
|
.actor_information_length = 0x14,
|
.tlv_type_partner_info = 0x02,
|
.partner_information_length = 0x14,
|
.tlv_type_collector_info = 0x03,
|
.collector_information_length = 0x10,
|
.collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
|
};
|
|
if (port) {
|
port->actor_port_priority = 0xff;
|
port->actor_port_aggregator_identifier = 0;
|
port->ntt = false;
|
port->actor_admin_port_state = AD_STATE_AGGREGATION |
|
AD_STATE_LACP_ACTIVITY;
|
port->actor_oper_port_state = AD_STATE_AGGREGATION |
|
AD_STATE_LACP_ACTIVITY;
|
|
if (lacp_fast)
|
port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
|
|
memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
|
memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
|
|
port->is_enabled = true;
|
/* private parameters */
|
port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
|
port->sm_rx_state = 0;
|
port->sm_rx_timer_counter = 0;
|
port->sm_periodic_state = 0;
|
port->sm_periodic_timer_counter = 0;
|
port->sm_mux_state = 0;
|
port->sm_mux_timer_counter = 0;
|
port->sm_tx_state = 0;
|
port->aggregator = NULL;
|
port->next_port_in_aggregator = NULL;
|
port->transaction_id = 0;
|
|
port->sm_churn_actor_timer_counter = 0;
|
port->sm_churn_actor_state = 0;
|
port->churn_actor_count = 0;
|
port->sm_churn_partner_timer_counter = 0;
|
port->sm_churn_partner_state = 0;
|
port->churn_partner_count = 0;
|
|
memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
|
}
|
}
|
|
/**
|
* ad_enable_collecting_distributing - enable a port's transmit/receive
|
* @port: the port we're looking at
|
* @update_slave_arr: Does slave array need update?
|
*
|
* Enable @port if it's in an active aggregator
|
*/
|
static void ad_enable_collecting_distributing(struct port *port,
|
bool *update_slave_arr)
|
{
|
if (port->aggregator->is_active) {
|
pr_debug("Enabling port %d(LAG %d)\n",
|
port->actor_port_number,
|
port->aggregator->aggregator_identifier);
|
__enable_port(port);
|
/* Slave array needs update */
|
*update_slave_arr = true;
|
}
|
}
|
|
/**
|
* ad_disable_collecting_distributing - disable a port's transmit/receive
|
* @port: the port we're looking at
|
* @update_slave_arr: Does slave array need update?
|
*/
|
static void ad_disable_collecting_distributing(struct port *port,
|
bool *update_slave_arr)
|
{
|
if (port->aggregator &&
|
!MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
|
&(null_mac_addr))) {
|
pr_debug("Disabling port %d(LAG %d)\n",
|
port->actor_port_number,
|
port->aggregator->aggregator_identifier);
|
__disable_port(port);
|
/* Slave array needs an update */
|
*update_slave_arr = true;
|
}
|
}
|
|
/**
|
* ad_marker_info_received - handle receive of a Marker information frame
|
* @marker_info: Marker info received
|
* @port: the port we're looking at
|
*/
|
static void ad_marker_info_received(struct bond_marker *marker_info,
|
struct port *port)
|
{
|
struct bond_marker marker;
|
|
/* copy the received marker data to the response marker */
|
memcpy(&marker, marker_info, sizeof(struct bond_marker));
|
/* change the marker subtype to marker response */
|
marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
|
|
/* send the marker response */
|
if (ad_marker_send(port, &marker) >= 0) {
|
pr_debug("Sent Marker Response on port %d\n",
|
port->actor_port_number);
|
}
|
}
|
|
/**
|
* ad_marker_response_received - handle receive of a marker response frame
|
* @marker: marker PDU received
|
* @port: the port we're looking at
|
*
|
* This function does nothing since we decided not to implement send and handle
|
* response for marker PDU's, in this stage, but only to respond to marker
|
* information.
|
*/
|
static void ad_marker_response_received(struct bond_marker *marker,
|
struct port *port)
|
{
|
/* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
|
}
|
|
/* ========= AD exported functions to the main bonding code ========= */
|
|
/* Check aggregators status in team every T seconds */
|
#define AD_AGGREGATOR_SELECTION_TIMER 8
|
|
/**
|
* bond_3ad_initiate_agg_selection - initate aggregator selection
|
* @bond: bonding struct
|
*
|
* Set the aggregation selection timer, to initiate an agg selection in
|
* the very near future. Called during first initialization, and during
|
* any down to up transitions of the bond.
|
*/
|
void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
|
{
|
atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
|
}
|
|
/**
|
* bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
|
* @bond: bonding struct to work on
|
* @tick_resolution: tick duration (millisecond resolution)
|
*
|
* Can be called only after the mac address of the bond is set.
|
*/
|
void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
|
{
|
/* check that the bond is not initialized yet */
|
if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
|
bond->dev->dev_addr)) {
|
|
BOND_AD_INFO(bond).aggregator_identifier = 0;
|
|
BOND_AD_INFO(bond).system.sys_priority =
|
bond->params.ad_actor_sys_prio;
|
if (is_zero_ether_addr(bond->params.ad_actor_system))
|
BOND_AD_INFO(bond).system.sys_mac_addr =
|
*((struct mac_addr *)bond->dev->dev_addr);
|
else
|
BOND_AD_INFO(bond).system.sys_mac_addr =
|
*((struct mac_addr *)bond->params.ad_actor_system);
|
|
/* initialize how many times this module is called in one
|
* second (should be about every 100ms)
|
*/
|
ad_ticks_per_sec = tick_resolution;
|
|
bond_3ad_initiate_agg_selection(bond,
|
AD_AGGREGATOR_SELECTION_TIMER *
|
ad_ticks_per_sec);
|
}
|
}
|
|
/**
|
* bond_3ad_bind_slave - initialize a slave's port
|
* @slave: slave struct to work on
|
*
|
* Returns: 0 on success
|
* < 0 on error
|
*/
|
void bond_3ad_bind_slave(struct slave *slave)
|
{
|
struct bonding *bond = bond_get_bond_by_slave(slave);
|
struct port *port;
|
struct aggregator *aggregator;
|
|
/* check that the slave has not been initialized yet. */
|
if (SLAVE_AD_INFO(slave)->port.slave != slave) {
|
|
/* port initialization */
|
port = &(SLAVE_AD_INFO(slave)->port);
|
|
ad_initialize_port(port, bond->params.lacp_fast);
|
|
port->slave = slave;
|
port->actor_port_number = SLAVE_AD_INFO(slave)->id;
|
/* key is determined according to the link speed, duplex and
|
* user key
|
*/
|
port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
|
ad_update_actor_keys(port, false);
|
/* actor system is the bond's system */
|
__ad_actor_update_port(port);
|
/* tx timer(to verify that no more than MAX_TX_IN_SECOND
|
* lacpdu's are sent in one second)
|
*/
|
port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
|
|
__disable_port(port);
|
|
/* aggregator initialization */
|
aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
|
|
ad_initialize_agg(aggregator);
|
|
aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
|
aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
|
aggregator->slave = slave;
|
aggregator->is_active = 0;
|
aggregator->num_of_ports = 0;
|
}
|
}
|
|
/**
|
* bond_3ad_unbind_slave - deinitialize a slave's port
|
* @slave: slave struct to work on
|
*
|
* Search for the aggregator that is related to this port, remove the
|
* aggregator and assign another aggregator for other port related to it
|
* (if any), and remove the port.
|
*/
|
void bond_3ad_unbind_slave(struct slave *slave)
|
{
|
struct port *port, *prev_port, *temp_port;
|
struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
|
int select_new_active_agg = 0;
|
struct bonding *bond = slave->bond;
|
struct slave *slave_iter;
|
struct list_head *iter;
|
bool dummy_slave_update; /* Ignore this value as caller updates array */
|
|
/* Sync against bond_3ad_state_machine_handler() */
|
spin_lock_bh(&bond->mode_lock);
|
aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
|
port = &(SLAVE_AD_INFO(slave)->port);
|
|
/* if slave is null, the whole port is not initialized */
|
if (!port->slave) {
|
netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
|
slave->dev->name);
|
goto out;
|
}
|
|
netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
|
aggregator->aggregator_identifier);
|
|
/* Tell the partner that this port is not suitable for aggregation */
|
port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
|
port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
|
port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
|
port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
|
__update_lacpdu_from_port(port);
|
ad_lacpdu_send(port);
|
|
/* check if this aggregator is occupied */
|
if (aggregator->lag_ports) {
|
/* check if there are other ports related to this aggregator
|
* except the port related to this slave(thats ensure us that
|
* there is a reason to search for new aggregator, and that we
|
* will find one
|
*/
|
if ((aggregator->lag_ports != port) ||
|
(aggregator->lag_ports->next_port_in_aggregator)) {
|
/* find new aggregator for the related port(s) */
|
bond_for_each_slave(bond, slave_iter, iter) {
|
new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
|
/* if the new aggregator is empty, or it is
|
* connected to our port only
|
*/
|
if (!new_aggregator->lag_ports ||
|
((new_aggregator->lag_ports == port) &&
|
!new_aggregator->lag_ports->next_port_in_aggregator))
|
break;
|
}
|
if (!slave_iter)
|
new_aggregator = NULL;
|
|
/* if new aggregator found, copy the aggregator's
|
* parameters and connect the related lag_ports to the
|
* new aggregator
|
*/
|
if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
|
netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
|
aggregator->aggregator_identifier,
|
new_aggregator->aggregator_identifier);
|
|
if ((new_aggregator->lag_ports == port) &&
|
new_aggregator->is_active) {
|
netdev_info(bond->dev, "Removing an active aggregator\n");
|
select_new_active_agg = 1;
|
}
|
|
new_aggregator->is_individual = aggregator->is_individual;
|
new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
|
new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
|
new_aggregator->partner_system = aggregator->partner_system;
|
new_aggregator->partner_system_priority = aggregator->partner_system_priority;
|
new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
|
new_aggregator->receive_state = aggregator->receive_state;
|
new_aggregator->transmit_state = aggregator->transmit_state;
|
new_aggregator->lag_ports = aggregator->lag_ports;
|
new_aggregator->is_active = aggregator->is_active;
|
new_aggregator->num_of_ports = aggregator->num_of_ports;
|
|
/* update the information that is written on
|
* the ports about the aggregator
|
*/
|
for (temp_port = aggregator->lag_ports; temp_port;
|
temp_port = temp_port->next_port_in_aggregator) {
|
temp_port->aggregator = new_aggregator;
|
temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
|
}
|
|
ad_clear_agg(aggregator);
|
|
if (select_new_active_agg)
|
ad_agg_selection_logic(__get_first_agg(port),
|
&dummy_slave_update);
|
} else {
|
netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
|
}
|
} else {
|
/* in case that the only port related to this
|
* aggregator is the one we want to remove
|
*/
|
select_new_active_agg = aggregator->is_active;
|
ad_clear_agg(aggregator);
|
if (select_new_active_agg) {
|
netdev_info(bond->dev, "Removing an active aggregator\n");
|
/* select new active aggregator */
|
temp_aggregator = __get_first_agg(port);
|
if (temp_aggregator)
|
ad_agg_selection_logic(temp_aggregator,
|
&dummy_slave_update);
|
}
|
}
|
}
|
|
netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
|
|
/* find the aggregator that this port is connected to */
|
bond_for_each_slave(bond, slave_iter, iter) {
|
temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
|
prev_port = NULL;
|
/* search the port in the aggregator's related ports */
|
for (temp_port = temp_aggregator->lag_ports; temp_port;
|
prev_port = temp_port,
|
temp_port = temp_port->next_port_in_aggregator) {
|
if (temp_port == port) {
|
/* the aggregator found - detach the port from
|
* this aggregator
|
*/
|
if (prev_port)
|
prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
|
else
|
temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
|
temp_aggregator->num_of_ports--;
|
if (__agg_active_ports(temp_aggregator) == 0) {
|
select_new_active_agg = temp_aggregator->is_active;
|
ad_clear_agg(temp_aggregator);
|
if (select_new_active_agg) {
|
netdev_info(bond->dev, "Removing an active aggregator\n");
|
/* select new active aggregator */
|
ad_agg_selection_logic(__get_first_agg(port),
|
&dummy_slave_update);
|
}
|
}
|
break;
|
}
|
}
|
}
|
port->slave = NULL;
|
|
out:
|
spin_unlock_bh(&bond->mode_lock);
|
}
|
|
/**
|
* bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
|
* @bond: bonding struct to work on
|
*
|
* If an ad_actor setting gets changed we need to update the individual port
|
* settings so the bond device will use the new values when it gets upped.
|
*/
|
void bond_3ad_update_ad_actor_settings(struct bonding *bond)
|
{
|
struct list_head *iter;
|
struct slave *slave;
|
|
ASSERT_RTNL();
|
|
BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
|
if (is_zero_ether_addr(bond->params.ad_actor_system))
|
BOND_AD_INFO(bond).system.sys_mac_addr =
|
*((struct mac_addr *)bond->dev->dev_addr);
|
else
|
BOND_AD_INFO(bond).system.sys_mac_addr =
|
*((struct mac_addr *)bond->params.ad_actor_system);
|
|
spin_lock_bh(&bond->mode_lock);
|
bond_for_each_slave(bond, slave, iter) {
|
struct port *port = &(SLAVE_AD_INFO(slave))->port;
|
|
__ad_actor_update_port(port);
|
port->ntt = true;
|
}
|
spin_unlock_bh(&bond->mode_lock);
|
}
|
|
/**
|
* bond_agg_timer_advance - advance agg_select_timer
|
* @bond: bonding structure
|
*
|
* Return true when agg_select_timer reaches 0.
|
*/
|
static bool bond_agg_timer_advance(struct bonding *bond)
|
{
|
int val, nval;
|
|
while (1) {
|
val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
|
if (!val)
|
return false;
|
nval = val - 1;
|
if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
|
val, nval) == val)
|
break;
|
}
|
return nval == 0;
|
}
|
|
/**
|
* bond_3ad_state_machine_handler - handle state machines timeout
|
* @bond: bonding struct to work on
|
*
|
* The state machine handling concept in this module is to check every tick
|
* which state machine should operate any function. The execution order is
|
* round robin, so when we have an interaction between state machines, the
|
* reply of one to each other might be delayed until next tick.
|
*
|
* This function also complete the initialization when the agg_select_timer
|
* times out, and it selects an aggregator for the ports that are yet not
|
* related to any aggregator, and selects the active aggregator for a bond.
|
*/
|
void bond_3ad_state_machine_handler(struct work_struct *work)
|
{
|
struct bonding *bond = container_of(work, struct bonding,
|
ad_work.work);
|
struct aggregator *aggregator;
|
struct list_head *iter;
|
struct slave *slave;
|
struct port *port;
|
bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
|
bool update_slave_arr = false;
|
|
/* Lock to protect data accessed by all (e.g., port->sm_vars) and
|
* against running with bond_3ad_unbind_slave. ad_rx_machine may run
|
* concurrently due to incoming LACPDU as well.
|
*/
|
spin_lock_bh(&bond->mode_lock);
|
rcu_read_lock();
|
|
/* check if there are any slaves */
|
if (!bond_has_slaves(bond))
|
goto re_arm;
|
|
if (bond_agg_timer_advance(bond)) {
|
slave = bond_first_slave_rcu(bond);
|
port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
|
|
/* select the active aggregator for the bond */
|
if (port) {
|
if (!port->slave) {
|
net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
|
bond->dev->name);
|
goto re_arm;
|
}
|
|
aggregator = __get_first_agg(port);
|
ad_agg_selection_logic(aggregator, &update_slave_arr);
|
}
|
bond_3ad_set_carrier(bond);
|
}
|
|
/* for each port run the state machines */
|
bond_for_each_slave_rcu(bond, slave, iter) {
|
port = &(SLAVE_AD_INFO(slave)->port);
|
if (!port->slave) {
|
net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
|
bond->dev->name);
|
goto re_arm;
|
}
|
|
ad_rx_machine(NULL, port);
|
ad_periodic_machine(port);
|
ad_port_selection_logic(port, &update_slave_arr);
|
ad_mux_machine(port, &update_slave_arr);
|
ad_tx_machine(port);
|
ad_churn_machine(port);
|
|
/* turn off the BEGIN bit, since we already handled it */
|
if (port->sm_vars & AD_PORT_BEGIN)
|
port->sm_vars &= ~AD_PORT_BEGIN;
|
}
|
|
re_arm:
|
bond_for_each_slave_rcu(bond, slave, iter) {
|
if (slave->should_notify) {
|
should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
|
break;
|
}
|
}
|
rcu_read_unlock();
|
spin_unlock_bh(&bond->mode_lock);
|
|
if (update_slave_arr)
|
bond_slave_arr_work_rearm(bond, 0);
|
|
if (should_notify_rtnl && rtnl_trylock()) {
|
bond_slave_state_notify(bond);
|
rtnl_unlock();
|
}
|
queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
|
}
|
|
/**
|
* bond_3ad_rx_indication - handle a received frame
|
* @lacpdu: received lacpdu
|
* @slave: slave struct to work on
|
* @length: length of the data received
|
*
|
* It is assumed that frames that were sent on this NIC don't returned as new
|
* received frames (loopback). Since only the payload is given to this
|
* function, it check for loopback.
|
*/
|
static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
|
u16 length)
|
{
|
struct port *port;
|
int ret = RX_HANDLER_ANOTHER;
|
|
if (length >= sizeof(struct lacpdu)) {
|
|
port = &(SLAVE_AD_INFO(slave)->port);
|
|
if (!port->slave) {
|
net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
|
slave->dev->name, slave->bond->dev->name);
|
return ret;
|
}
|
|
switch (lacpdu->subtype) {
|
case AD_TYPE_LACPDU:
|
ret = RX_HANDLER_CONSUMED;
|
netdev_dbg(slave->bond->dev,
|
"Received LACPDU on port %d slave %s\n",
|
port->actor_port_number,
|
slave->dev->name);
|
/* Protect against concurrent state machines */
|
spin_lock(&slave->bond->mode_lock);
|
ad_rx_machine(lacpdu, port);
|
spin_unlock(&slave->bond->mode_lock);
|
break;
|
|
case AD_TYPE_MARKER:
|
ret = RX_HANDLER_CONSUMED;
|
/* No need to convert fields to Little Endian since we
|
* don't use the marker's fields.
|
*/
|
|
switch (((struct bond_marker *)lacpdu)->tlv_type) {
|
case AD_MARKER_INFORMATION_SUBTYPE:
|
netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
|
port->actor_port_number);
|
ad_marker_info_received((struct bond_marker *)lacpdu, port);
|
break;
|
|
case AD_MARKER_RESPONSE_SUBTYPE:
|
netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
|
port->actor_port_number);
|
ad_marker_response_received((struct bond_marker *)lacpdu, port);
|
break;
|
|
default:
|
netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
|
port->actor_port_number);
|
}
|
}
|
}
|
return ret;
|
}
|
|
/**
|
* ad_update_actor_keys - Update the oper / admin keys for a port based on
|
* its current speed and duplex settings.
|
*
|
* @port: the port we'are looking at
|
* @reset: Boolean to just reset the speed and the duplex part of the key
|
*
|
* The logic to change the oper / admin keys is:
|
* (a) A full duplex port can participate in LACP with partner.
|
* (b) When the speed is changed, LACP need to be reinitiated.
|
*/
|
static void ad_update_actor_keys(struct port *port, bool reset)
|
{
|
u8 duplex = 0;
|
u16 ospeed = 0, speed = 0;
|
u16 old_oper_key = port->actor_oper_port_key;
|
|
port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
|
if (!reset) {
|
speed = __get_link_speed(port);
|
ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
|
duplex = __get_duplex(port);
|
port->actor_admin_port_key |= (speed << 1) | duplex;
|
}
|
port->actor_oper_port_key = port->actor_admin_port_key;
|
|
if (old_oper_key != port->actor_oper_port_key) {
|
/* Only 'duplex' port participates in LACP */
|
if (duplex)
|
port->sm_vars |= AD_PORT_LACP_ENABLED;
|
else
|
port->sm_vars &= ~AD_PORT_LACP_ENABLED;
|
|
if (!reset) {
|
if (!speed) {
|
netdev_err(port->slave->dev,
|
"speed changed to 0 for port %s",
|
port->slave->dev->name);
|
} else if (duplex && ospeed != speed) {
|
/* Speed change restarts LACP state-machine */
|
port->sm_vars |= AD_PORT_BEGIN;
|
}
|
}
|
}
|
}
|
|
/**
|
* bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
|
* change indication
|
*
|
* @slave: slave struct to work on
|
*
|
* Handle reselection of aggregator (if needed) for this port.
|
*/
|
void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
|
{
|
struct port *port;
|
|
port = &(SLAVE_AD_INFO(slave)->port);
|
|
/* if slave is null, the whole port is not initialized */
|
if (!port->slave) {
|
netdev_warn(slave->bond->dev,
|
"speed/duplex changed for uninitialized port %s\n",
|
slave->dev->name);
|
return;
|
}
|
|
spin_lock_bh(&slave->bond->mode_lock);
|
ad_update_actor_keys(port, false);
|
spin_unlock_bh(&slave->bond->mode_lock);
|
netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
|
port->actor_port_number, slave->dev->name);
|
}
|
|
/**
|
* 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 aggregator *agg;
|
struct port *port;
|
bool dummy;
|
|
port = &(SLAVE_AD_INFO(slave)->port);
|
|
/* if slave is null, the whole port is not initialized */
|
if (!port->slave) {
|
netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
|
slave->dev->name);
|
return;
|
}
|
|
spin_lock_bh(&slave->bond->mode_lock);
|
/* on link down we are zeroing duplex and speed since
|
* some of the adaptors(ce1000.lan) report full duplex/speed
|
* instead of N/A(duplex) / 0(speed).
|
*
|
* on link up we are forcing recheck on the duplex and speed since
|
* some of he adaptors(ce1000.lan) report.
|
*/
|
if (link == BOND_LINK_UP) {
|
port->is_enabled = true;
|
ad_update_actor_keys(port, false);
|
} else {
|
/* link has failed */
|
port->is_enabled = false;
|
ad_update_actor_keys(port, true);
|
}
|
agg = __get_first_agg(port);
|
ad_agg_selection_logic(agg, &dummy);
|
|
spin_unlock_bh(&slave->bond->mode_lock);
|
|
netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
|
port->actor_port_number,
|
link == BOND_LINK_UP ? "UP" : "DOWN");
|
|
/* RTNL is held and mode_lock is released so it's safe
|
* to update slave_array here.
|
*/
|
bond_update_slave_arr(slave->bond, NULL);
|
}
|
|
/**
|
* bond_3ad_set_carrier - set link state for bonding master
|
* @bond - bonding structure
|
*
|
* if we have an active aggregator, we're up, if not, we're down.
|
* Presumes that we cannot have an active aggregator if there are
|
* no slaves with link up.
|
*
|
* This behavior complies with IEEE 802.3 section 43.3.9.
|
*
|
* Called by bond_set_carrier(). Return zero if carrier state does not
|
* change, nonzero if it does.
|
*/
|
int bond_3ad_set_carrier(struct bonding *bond)
|
{
|
struct aggregator *active;
|
struct slave *first_slave;
|
int ret = 1;
|
|
rcu_read_lock();
|
first_slave = bond_first_slave_rcu(bond);
|
if (!first_slave) {
|
ret = 0;
|
goto out;
|
}
|
active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
|
if (active) {
|
/* are enough slaves available to consider link up? */
|
if (__agg_active_ports(active) < bond->params.min_links) {
|
if (netif_carrier_ok(bond->dev)) {
|
netif_carrier_off(bond->dev);
|
goto out;
|
}
|
} else if (!netif_carrier_ok(bond->dev)) {
|
netif_carrier_on(bond->dev);
|
goto out;
|
}
|
} else if (netif_carrier_ok(bond->dev)) {
|
netif_carrier_off(bond->dev);
|
}
|
out:
|
rcu_read_unlock();
|
return ret;
|
}
|
|
/**
|
* __bond_3ad_get_active_agg_info - get information of the active aggregator
|
* @bond: bonding struct to work on
|
* @ad_info: ad_info struct to fill with the bond's info
|
*
|
* Returns: 0 on success
|
* < 0 on error
|
*/
|
int __bond_3ad_get_active_agg_info(struct bonding *bond,
|
struct ad_info *ad_info)
|
{
|
struct aggregator *aggregator = NULL;
|
struct list_head *iter;
|
struct slave *slave;
|
struct port *port;
|
|
bond_for_each_slave_rcu(bond, slave, iter) {
|
port = &(SLAVE_AD_INFO(slave)->port);
|
if (port->aggregator && port->aggregator->is_active) {
|
aggregator = port->aggregator;
|
break;
|
}
|
}
|
|
if (!aggregator)
|
return -1;
|
|
ad_info->aggregator_id = aggregator->aggregator_identifier;
|
ad_info->ports = __agg_active_ports(aggregator);
|
ad_info->actor_key = aggregator->actor_oper_aggregator_key;
|
ad_info->partner_key = aggregator->partner_oper_aggregator_key;
|
ether_addr_copy(ad_info->partner_system,
|
aggregator->partner_system.mac_addr_value);
|
return 0;
|
}
|
|
int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
|
{
|
int ret;
|
|
rcu_read_lock();
|
ret = __bond_3ad_get_active_agg_info(bond, ad_info);
|
rcu_read_unlock();
|
|
return ret;
|
}
|
|
int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
|
struct slave *slave)
|
{
|
struct lacpdu *lacpdu, _lacpdu;
|
|
if (skb->protocol != PKT_TYPE_LACPDU)
|
return RX_HANDLER_ANOTHER;
|
|
if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
|
return RX_HANDLER_ANOTHER;
|
|
lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
|
if (!lacpdu)
|
return RX_HANDLER_ANOTHER;
|
|
return bond_3ad_rx_indication(lacpdu, slave, skb->len);
|
}
|
|
/**
|
* bond_3ad_update_lacp_rate - change the lacp rate
|
* @bond - bonding struct
|
*
|
* When modify lacp_rate parameter via sysfs,
|
* update actor_oper_port_state of each port.
|
*
|
* Hold bond->mode_lock,
|
* so we can modify port->actor_oper_port_state,
|
* no matter bond is up or down.
|
*/
|
void bond_3ad_update_lacp_rate(struct bonding *bond)
|
{
|
struct port *port = NULL;
|
struct list_head *iter;
|
struct slave *slave;
|
int lacp_fast;
|
|
lacp_fast = bond->params.lacp_fast;
|
spin_lock_bh(&bond->mode_lock);
|
bond_for_each_slave(bond, slave, iter) {
|
port = &(SLAVE_AD_INFO(slave)->port);
|
if (lacp_fast)
|
port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
|
else
|
port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
|
}
|
spin_unlock_bh(&bond->mode_lock);
|
}
|
