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bond_3ad.c
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bond_3ad.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
*/
#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>
#include <net/netlink.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 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,
AD_LINK_SPEED_200000MBPS,
AD_LINK_SPEED_400000MBPS,
};
/* 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, struct bond_params *bond_params);
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
* @port: the port 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
* %AD_LINK_SPEED_200000MBPS
* %AD_LINK_SPEED_400000MBPS
*/
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;
case SPEED_200000:
speed = AD_LINK_SPEED_200000MBPS;
break;
case SPEED_400000:
speed = AD_LINK_SPEED_400000MBPS;
break;
default:
/* unknown speed value from ethtool. shouldn't happen */
if (slave->speed != SPEED_UNKNOWN)
pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
slave->bond->dev->name,
slave->dev->name, slave->speed,
port->actor_port_number);
speed = 0;
break;
}
}
slave_dbg(slave->bond->dev, slave->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;
slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
port->actor_port_number);
break;
case DUPLEX_HALF:
default:
retval = 0x0;
slave_dbg(slave->bond->dev, slave->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 & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||
((lacpdu->actor_state & LACP_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 &= ~LACP_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 & LACP_STATE_SYNCHRONIZATION)) {
partner->port_state |= LACP_STATE_SYNCHRONIZATION;
slave_dbg(port->slave->bond->dev, port->slave->dev,
"partner sync=1\n");
} else {
partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;
slave_dbg(port->slave->bond->dev, port->slave->dev,
"partner sync=0\n");
}
}
}
/**
* __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 |= LACP_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 & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_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 & LACP_STATE_AGGREGATION)
!= (oper->port_state & LACP_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 & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||
((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||
((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||
((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_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;
case AD_LINK_SPEED_200000MBPS:
bandwidth = nports * 200000;
break;
case AD_LINK_SPEED_400000MBPS:
bandwidth = nports * 400000;
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;
slave_dbg(port->slave->bond->dev, port->slave->dev,
"update lacpdu: actor port state %x\n",
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;
atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
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;
switch (marker->tlv_type) {
case AD_MARKER_INFORMATION_SUBTYPE:
atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
break;
case AD_MARKER_RESPONSE_SUBTYPE:
atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
break;
}
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 & LACP_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