zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/Makefile b/ap/os/linux/linux-3.4.x/drivers/net/bonding/Makefile
new file mode 100644
index 0000000..4c21bf6
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the Ethernet Bonding driver
+#
+
+obj-$(CONFIG_BONDING) += bonding.o
+
+bonding-objs := bond_main.o bond_3ad.o bond_alb.o bond_sysfs.o bond_debugfs.o
+
+proc-$(CONFIG_PROC_FS) += bond_procfs.o
+bonding-objs += $(proc-y)
+
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_3ad.c b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_3ad.c
new file mode 100644
index 0000000..184be29
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_3ad.c
@@ -0,0 +1,2506 @@
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/if_bonding.h>
+#include <linux/pkt_sched.h>
+#include <net/net_namespace.h>
+#include "bonding.h"
+#include "bond_3ad.h"
+
+// General definitions
+#define AD_SHORT_TIMEOUT 1
+#define AD_LONG_TIMEOUT 0
+#define AD_STANDBY 0x2
+#define AD_MAX_TX_IN_SECOND 3
+#define AD_COLLECTOR_MAX_DELAY 0
+
+// Timer definitions(43.4.4 in the 802.3ad standard)
+#define AD_FAST_PERIODIC_TIME 1
+#define AD_SLOW_PERIODIC_TIME 30
+#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
+#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
+#define AD_CHURN_DETECTION_TIME 60
+#define AD_AGGREGATE_WAIT_TIME 2
+
+// Port state definitions(43.4.2.2 in the 802.3ad standard)
+#define AD_STATE_LACP_ACTIVITY 0x1
+#define AD_STATE_LACP_TIMEOUT 0x2
+#define AD_STATE_AGGREGATION 0x4
+#define AD_STATE_SYNCHRONIZATION 0x8
+#define AD_STATE_COLLECTING 0x10
+#define AD_STATE_DISTRIBUTING 0x20
+#define AD_STATE_DEFAULTED 0x40
+#define AD_STATE_EXPIRED 0x80
+
+// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
+#define AD_PORT_BEGIN 0x1
+#define AD_PORT_LACP_ENABLED 0x2
+#define AD_PORT_ACTOR_CHURN 0x4
+#define AD_PORT_PARTNER_CHURN 0x8
+#define AD_PORT_READY 0x10
+#define AD_PORT_READY_N 0x20
+#define AD_PORT_MATCHED 0x40
+#define AD_PORT_STANDBY 0x80
+#define AD_PORT_SELECTED 0x100
+#define AD_PORT_MOVED 0x200
+
+// Port Key definitions
+// key is determined according to the link speed, duplex and
+// user key(which is yet not supported)
+// ------------------------------------------------------------
+// Port key : | User key | Speed |Duplex|
+// ------------------------------------------------------------
+// 16 6 1 0
+#define AD_DUPLEX_KEY_BITS 0x1
+#define AD_SPEED_KEY_BITS 0x3E
+#define AD_USER_KEY_BITS 0xFFC0
+
+//dalloun
+#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
+#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
+#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
+#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
+#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
+//endalloun
+
+// compare MAC addresses
+#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
+
+static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
+static u16 ad_ticks_per_sec;
+static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
+
+static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+// ================= main 802.3ad protocol functions ==================
+static int ad_lacpdu_send(struct port *port);
+static int ad_marker_send(struct port *port, struct bond_marker *marker);
+static void ad_mux_machine(struct port *port);
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
+static void ad_tx_machine(struct port *port);
+static void ad_periodic_machine(struct port *port);
+static void ad_port_selection_logic(struct port *port);
+static void ad_agg_selection_logic(struct aggregator *aggregator);
+static void ad_clear_agg(struct aggregator *aggregator);
+static void ad_initialize_agg(struct aggregator *aggregator);
+static void ad_initialize_port(struct port *port, int lacp_fast);
+static void ad_enable_collecting_distributing(struct port *port);
+static void ad_disable_collecting_distributing(struct port *port);
+static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
+static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
+
+
+/////////////////////////////////////////////////////////////////////////////////
+// ================= api to bonding and kernel code ==================
+/////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * __get_bond_by_port - get the port's bonding struct
+ * @port: the port we're looking at
+ *
+ * Return @port's bonding struct, or %NULL if it can't be found.
+ */
+static inline struct bonding *__get_bond_by_port(struct port *port)
+{
+ if (port->slave == NULL)
+ return NULL;
+
+ return bond_get_bond_by_slave(port->slave);
+}
+
+/**
+ * __get_first_port - get the first port in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the port of the first slave in @bond, or %NULL if it can't be found.
+ */
+static inline struct port *__get_first_port(struct bonding *bond)
+{
+ if (bond->slave_cnt == 0)
+ return NULL;
+
+ return &(SLAVE_AD_INFO(bond->first_slave).port);
+}
+
+/**
+ * __get_next_port - get the next port in the bond
+ * @port: the port we're looking at
+ *
+ * Return the port of the slave that is next in line of @port's slave in the
+ * bond, or %NULL if it can't be found.
+ */
+static inline struct port *__get_next_port(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+ struct slave *slave = port->slave;
+
+ // If there's no bond for this port, or this is the last slave
+ if ((bond == NULL) || (slave->next == bond->first_slave))
+ return NULL;
+
+ return &(SLAVE_AD_INFO(slave->next).port);
+}
+
+/**
+ * __get_first_agg - get the first aggregator in the bond
+ * @bond: the bond we're looking at
+ *
+ * Return the aggregator of the first slave in @bond, or %NULL if it can't be
+ * found.
+ */
+static inline struct aggregator *__get_first_agg(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+
+ // If there's no bond for this port, or bond has no slaves
+ if ((bond == NULL) || (bond->slave_cnt == 0))
+ return NULL;
+
+ return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
+}
+
+/**
+ * __get_next_agg - get the next aggregator in the bond
+ * @aggregator: the aggregator we're looking at
+ *
+ * Return the aggregator of the slave that is next in line of @aggregator's
+ * slave in the bond, or %NULL if it can't be found.
+ */
+static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
+{
+ struct slave *slave = aggregator->slave;
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+
+ // If there's no bond for this aggregator, or this is the last slave
+ if ((bond == NULL) || (slave->next == bond->first_slave))
+ return NULL;
+
+ return &(SLAVE_AD_INFO(slave->next).aggregator);
+}
+
+/*
+ * __agg_has_partner
+ *
+ * Return nonzero if aggregator has a partner (denoted by a non-zero ether
+ * address for the partner). Return 0 if not.
+ */
+static inline int __agg_has_partner(struct aggregator *agg)
+{
+ return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
+}
+
+/**
+ * __disable_port - disable the port's slave
+ * @port: the port we're looking at
+ *
+ */
+static inline void __disable_port(struct port *port)
+{
+ bond_set_slave_inactive_flags(port->slave);
+}
+
+/**
+ * __enable_port - enable the port's slave, if it's up
+ * @port: the port we're looking at
+ *
+ */
+static inline void __enable_port(struct port *port)
+{
+ struct slave *slave = port->slave;
+
+ if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
+ bond_set_slave_active_flags(slave);
+}
+
+/**
+ * __port_is_enabled - check if the port's slave is in active state
+ * @port: the port we're looking at
+ *
+ */
+static inline int __port_is_enabled(struct port *port)
+{
+ return bond_is_active_slave(port->slave);
+}
+
+/**
+ * __get_agg_selection_mode - get the aggregator selection mode
+ * @port: the port we're looking at
+ *
+ * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
+ */
+static inline u32 __get_agg_selection_mode(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+
+ if (bond == NULL)
+ return BOND_AD_STABLE;
+
+ return bond->params.ad_select;
+}
+
+/**
+ * __check_agg_selection_timer - check if the selection timer has expired
+ * @port: the port we're looking at
+ *
+ */
+static inline int __check_agg_selection_timer(struct port *port)
+{
+ struct bonding *bond = __get_bond_by_port(port);
+
+ if (bond == NULL)
+ return 0;
+
+ return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
+}
+
+/**
+ * __get_state_machine_lock - lock the port's state machines
+ * @port: the port we're looking at
+ *
+ */
+static inline void __get_state_machine_lock(struct port *port)
+{
+ spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+}
+
+/**
+ * __release_state_machine_lock - unlock the port's state machines
+ * @port: the port we're looking at
+ *
+ */
+static inline void __release_state_machine_lock(struct port *port)
+{
+ spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+}
+
+/**
+ * __get_link_speed - get a port's speed
+ * @port: the port we're looking at
+ *
+ * Return @port's speed in 802.3ad bitmask format. i.e. one of:
+ * 0,
+ * %AD_LINK_SPEED_BITMASK_10MBPS,
+ * %AD_LINK_SPEED_BITMASK_100MBPS,
+ * %AD_LINK_SPEED_BITMASK_1000MBPS,
+ * %AD_LINK_SPEED_BITMASK_10000MBPS
+ */
+static u16 __get_link_speed(struct port *port)
+{
+ struct slave *slave = port->slave;
+ u16 speed;
+
+ /* this if covers only a special case: when the configuration starts with
+ * link down, it sets the speed to 0.
+ * This is done in spite of the fact that the e100 driver reports 0 to be
+ * compatible with MVT in the future.*/
+ if (slave->link != BOND_LINK_UP)
+ speed = 0;
+ else {
+ switch (slave->speed) {
+ case SPEED_10:
+ speed = AD_LINK_SPEED_BITMASK_10MBPS;
+ break;
+
+ case SPEED_100:
+ speed = AD_LINK_SPEED_BITMASK_100MBPS;
+ break;
+
+ case SPEED_1000:
+ speed = AD_LINK_SPEED_BITMASK_1000MBPS;
+ break;
+
+ case SPEED_10000:
+ speed = AD_LINK_SPEED_BITMASK_10000MBPS;
+ break;
+
+ default:
+ speed = 0; // unknown speed value from ethtool. shouldn't happen
+ break;
+ }
+ }
+
+ pr_debug("Port %d Received link speed %d update from adapter\n",
+ port->actor_port_number, speed);
+ return speed;
+}
+
+/**
+ * __get_duplex - get a port's duplex
+ * @port: the port we're looking at
+ *
+ * Return @port's duplex in 802.3ad bitmask format. i.e.:
+ * 0x01 if in full duplex
+ * 0x00 otherwise
+ */
+static u8 __get_duplex(struct port *port)
+{
+ struct slave *slave = port->slave;
+
+ u8 retval;
+
+ // handling a special case: when the configuration starts with
+ // link down, it sets the duplex to 0.
+ if (slave->link != BOND_LINK_UP)
+ retval = 0x0;
+ else {
+ switch (slave->duplex) {
+ case DUPLEX_FULL:
+ retval = 0x1;
+ pr_debug("Port %d Received status full duplex update from adapter\n",
+ port->actor_port_number);
+ break;
+ case DUPLEX_HALF:
+ default:
+ retval = 0x0;
+ pr_debug("Port %d Received status NOT full duplex update from adapter\n",
+ port->actor_port_number);
+ break;
+ }
+ }
+ return retval;
+}
+
+/**
+ * __initialize_port_locks - initialize a port's STATE machine spinlock
+ * @port: the port we're looking at
+ *
+ */
+static inline void __initialize_port_locks(struct port *port)
+{
+ // make sure it isn't called twice
+ spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
+}
+
+//conversions
+
+/**
+ * __ad_timer_to_ticks - convert a given timer type to AD module ticks
+ * @timer_type: which timer to operate
+ * @par: timer parameter. see below
+ *
+ * If @timer_type is %current_while_timer, @par indicates long/short timer.
+ * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
+ * %SLOW_PERIODIC_TIME.
+ */
+static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
+{
+ u16 retval = 0; /* to silence the compiler */
+
+ switch (timer_type) {
+ case AD_CURRENT_WHILE_TIMER: // for rx machine usage
+ if (par)
+ retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
+ else
+ retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
+ break;
+ case AD_ACTOR_CHURN_TIMER: // for local churn machine
+ retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+ break;
+ case AD_PERIODIC_TIMER: // for periodic machine
+ retval = (par*ad_ticks_per_sec); // long timeout
+ break;
+ case AD_PARTNER_CHURN_TIMER: // for remote churn machine
+ retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
+ break;
+ case AD_WAIT_WHILE_TIMER: // for selection machine
+ retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
+ break;
+ }
+ return retval;
+}
+
+
+/////////////////////////////////////////////////////////////////////////////////
+// ================= ad_rx_machine helper functions ==================
+/////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * __choose_matched - update a port's matched variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the matched variable, using parameter values from a
+ * newly received lacpdu. Parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the actor. Matched is set to TRUE if all of these parameters
+ * match and the PDU parameter partner_state.aggregation has the same value as
+ * actor_oper_port_state.aggregation and lacp will actively maintain the link
+ * in the aggregation. Matched is also set to TRUE if the value of
+ * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
+ * an individual link and lacp will actively maintain the link. Otherwise,
+ * matched is set to FALSE. LACP is considered to be actively maintaining the
+ * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
+ * the actor's actor_oper_port_state.lacp_activity and the PDU's
+ * partner_state.lacp_activity variables are TRUE.
+ *
+ * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
+ * used here to implement the language from 802.3ad 43.4.9 that requires
+ * recordPDU to "match" the LACPDU parameters to the stored values.
+ */
+static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
+{
+ // check if all parameters are alike
+ if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
+ (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
+ !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
+ (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
+ (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
+ ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
+ // or this is individual link(aggregation == FALSE)
+ ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
+ ) {
+ // update the state machine Matched variable
+ port->sm_vars |= AD_PORT_MATCHED;
+ } else {
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ }
+}
+
+/**
+ * __record_pdu - record parameters from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Record the parameter values for the Actor carried in a received lacpdu as
+ * the current partner operational parameter values and sets
+ * actor_oper_port_state.defaulted to FALSE.
+ */
+static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
+{
+ if (lacpdu && port) {
+ struct port_params *partner = &port->partner_oper;
+
+ __choose_matched(lacpdu, port);
+ // record the new parameter values for the partner operational
+ partner->port_number = ntohs(lacpdu->actor_port);
+ partner->port_priority = ntohs(lacpdu->actor_port_priority);
+ partner->system = lacpdu->actor_system;
+ partner->system_priority = ntohs(lacpdu->actor_system_priority);
+ partner->key = ntohs(lacpdu->actor_key);
+ partner->port_state = lacpdu->actor_state;
+
+ // set actor_oper_port_state.defaulted to FALSE
+ port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
+
+ // set the partner sync. to on if the partner is sync. and the port is matched
+ if ((port->sm_vars & AD_PORT_MATCHED)
+ && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
+ partner->port_state |= AD_STATE_SYNCHRONIZATION;
+ else
+ partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
+ }
+}
+
+/**
+ * __record_default - record default parameters
+ * @port: the port we're looking at
+ *
+ * This function records the default parameter values for the partner carried
+ * in the Partner Admin parameters as the current partner operational parameter
+ * values and sets actor_oper_port_state.defaulted to TRUE.
+ */
+static void __record_default(struct port *port)
+{
+ if (port) {
+ // record the partner admin parameters
+ memcpy(&port->partner_oper, &port->partner_admin,
+ sizeof(struct port_params));
+
+ // set actor_oper_port_state.defaulted to true
+ port->actor_oper_port_state |= AD_STATE_DEFAULTED;
+ }
+}
+
+/**
+ * __update_selected - update a port's Selected variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Update the value of the selected variable, using parameter values from a
+ * newly received lacpdu. The parameter values for the Actor carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the ports partner. If one or more of the comparisons shows that
+ * the value(s) received in the PDU differ from the current operational values,
+ * then selected is set to FALSE and actor_oper_port_state.synchronization is
+ * set to out_of_sync. Otherwise, selected remains unchanged.
+ */
+static void __update_selected(struct lacpdu *lacpdu, struct port *port)
+{
+ if (lacpdu && port) {
+ const struct port_params *partner = &port->partner_oper;
+
+ // check if any parameter is different
+ if (ntohs(lacpdu->actor_port) != partner->port_number ||
+ ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
+ MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
+ ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
+ ntohs(lacpdu->actor_key) != partner->key ||
+ (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
+ // update the state machine Selected variable
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ }
+ }
+}
+
+/**
+ * __update_default_selected - update a port's Selected variable from Partner
+ * @port: the port we're looking at
+ *
+ * This function updates the value of the selected variable, using the partner
+ * administrative parameter values. The administrative values are compared with
+ * the corresponding operational parameter values for the partner. If one or
+ * more of the comparisons shows that the administrative value(s) differ from
+ * the current operational values, then Selected is set to FALSE and
+ * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
+ * Selected remains unchanged.
+ */
+static void __update_default_selected(struct port *port)
+{
+ if (port) {
+ const struct port_params *admin = &port->partner_admin;
+ const struct port_params *oper = &port->partner_oper;
+
+ // check if any parameter is different
+ if (admin->port_number != oper->port_number ||
+ admin->port_priority != oper->port_priority ||
+ MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
+ admin->system_priority != oper->system_priority ||
+ admin->key != oper->key ||
+ (admin->port_state & AD_STATE_AGGREGATION)
+ != (oper->port_state & AD_STATE_AGGREGATION)) {
+ // update the state machine Selected variable
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ }
+ }
+}
+
+/**
+ * __update_ntt - update a port's ntt variable from a received lacpdu
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * Updates the value of the ntt variable, using parameter values from a newly
+ * received lacpdu. The parameter values for the partner carried in the
+ * received PDU are compared with the corresponding operational parameter
+ * values for the Actor. If one or more of the comparisons shows that the
+ * value(s) received in the PDU differ from the current operational values,
+ * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
+ */
+static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
+{
+ // validate lacpdu and port
+ if (lacpdu && port) {
+ // check if any parameter is different
+ if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
+ (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
+ MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
+ (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
+ (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
+ ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
+ ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
+ ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
+ ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
+ ) {
+
+ port->ntt = true;
+ }
+ }
+}
+
+/**
+ * __attach_bond_to_agg
+ * @port: the port we're looking at
+ *
+ * Handle the attaching of the port's control parser/multiplexer and the
+ * aggregator. This function does nothing since the parser/multiplexer of the
+ * receive and the parser/multiplexer of the aggregator are already combined.
+ */
+static void __attach_bond_to_agg(struct port *port)
+{
+ port = NULL; /* just to satisfy the compiler */
+ // This function does nothing since the parser/multiplexer of the receive
+ // and the parser/multiplexer of the aggregator are already combined
+}
+
+/**
+ * __detach_bond_from_agg
+ * @port: the port we're looking at
+ *
+ * Handle the detaching of the port's control parser/multiplexer from the
+ * aggregator. This function does nothing since the parser/multiplexer of the
+ * receive and the parser/multiplexer of the aggregator are already combined.
+ */
+static void __detach_bond_from_agg(struct port *port)
+{
+ port = NULL; /* just to satisfy the compiler */
+ // This function does nothing since the parser/multiplexer of the receive
+ // and the parser/multiplexer of the aggregator are already combined
+}
+
+/**
+ * __agg_ports_are_ready - check if all ports in an aggregator are ready
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static int __agg_ports_are_ready(struct aggregator *aggregator)
+{
+ struct port *port;
+ int retval = 1;
+
+ if (aggregator) {
+ // scan all ports in this aggregator to verfy if they are all ready
+ for (port = aggregator->lag_ports;
+ port;
+ port = port->next_port_in_aggregator) {
+ if (!(port->sm_vars & AD_PORT_READY_N)) {
+ retval = 0;
+ break;
+ }
+ }
+ }
+
+ return retval;
+}
+
+/**
+ * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
+ * @aggregator: the aggregator we're looking at
+ * @val: Should the ports' ready bit be set on or off
+ *
+ */
+static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
+{
+ struct port *port;
+
+ for (port = aggregator->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ if (val)
+ port->sm_vars |= AD_PORT_READY;
+ else
+ port->sm_vars &= ~AD_PORT_READY;
+ }
+}
+
+/**
+ * __get_agg_bandwidth - get the total bandwidth of an aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static u32 __get_agg_bandwidth(struct aggregator *aggregator)
+{
+ u32 bandwidth = 0;
+
+ if (aggregator->num_of_ports) {
+ switch (__get_link_speed(aggregator->lag_ports)) {
+ case AD_LINK_SPEED_BITMASK_1MBPS:
+ bandwidth = aggregator->num_of_ports;
+ break;
+ case AD_LINK_SPEED_BITMASK_10MBPS:
+ bandwidth = aggregator->num_of_ports * 10;
+ break;
+ case AD_LINK_SPEED_BITMASK_100MBPS:
+ bandwidth = aggregator->num_of_ports * 100;
+ break;
+ case AD_LINK_SPEED_BITMASK_1000MBPS:
+ bandwidth = aggregator->num_of_ports * 1000;
+ break;
+ case AD_LINK_SPEED_BITMASK_10000MBPS:
+ bandwidth = aggregator->num_of_ports * 10000;
+ break;
+ default:
+ bandwidth = 0; /*to silence the compiler ....*/
+ }
+ }
+ return bandwidth;
+}
+
+/**
+ * __get_active_agg - get the current active aggregator
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static struct aggregator *__get_active_agg(struct aggregator *aggregator)
+{
+ struct aggregator *retval = NULL;
+
+ for (; aggregator; aggregator = __get_next_agg(aggregator)) {
+ if (aggregator->is_active) {
+ retval = aggregator;
+ break;
+ }
+ }
+
+ return retval;
+}
+
+/**
+ * __update_lacpdu_from_port - update a port's lacpdu fields
+ * @port: the port we're looking at
+ *
+ */
+static inline void __update_lacpdu_from_port(struct port *port)
+{
+ struct lacpdu *lacpdu = &port->lacpdu;
+ const struct port_params *partner = &port->partner_oper;
+
+ /* update current actual Actor parameters */
+ /* lacpdu->subtype initialized
+ * lacpdu->version_number initialized
+ * lacpdu->tlv_type_actor_info initialized
+ * lacpdu->actor_information_length initialized
+ */
+
+ lacpdu->actor_system_priority = htons(port->actor_system_priority);
+ lacpdu->actor_system = port->actor_system;
+ lacpdu->actor_key = htons(port->actor_oper_port_key);
+ lacpdu->actor_port_priority = htons(port->actor_port_priority);
+ lacpdu->actor_port = htons(port->actor_port_number);
+ lacpdu->actor_state = port->actor_oper_port_state;
+
+ /* lacpdu->reserved_3_1 initialized
+ * lacpdu->tlv_type_partner_info initialized
+ * lacpdu->partner_information_length initialized
+ */
+
+ lacpdu->partner_system_priority = htons(partner->system_priority);
+ lacpdu->partner_system = partner->system;
+ lacpdu->partner_key = htons(partner->key);
+ lacpdu->partner_port_priority = htons(partner->port_priority);
+ lacpdu->partner_port = htons(partner->port_number);
+ lacpdu->partner_state = partner->port_state;
+
+ /* lacpdu->reserved_3_2 initialized
+ * lacpdu->tlv_type_collector_info initialized
+ * lacpdu->collector_information_length initialized
+ * collector_max_delay initialized
+ * reserved_12[12] initialized
+ * tlv_type_terminator initialized
+ * terminator_length initialized
+ * reserved_50[50] initialized
+ */
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// ================= main 802.3ad protocol code ======================================
+//////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * ad_lacpdu_send - send out a lacpdu packet on a given port
+ * @port: the port we're looking at
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+static int ad_lacpdu_send(struct port *port)
+{
+ struct slave *slave = port->slave;
+ struct sk_buff *skb;
+ struct lacpdu_header *lacpdu_header;
+ int length = sizeof(struct lacpdu_header);
+
+ skb = dev_alloc_skb(length);
+ if (!skb)
+ return -ENOMEM;
+
+ skb->dev = slave->dev;
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+ skb->priority = TC_PRIO_CONTROL;
+
+ lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
+
+ memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
+ /* Note: source address is set to be the member's PERMANENT address,
+ because we use it to identify loopback lacpdus in receive. */
+ memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
+ lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+ lacpdu_header->lacpdu = port->lacpdu; // struct copy
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/**
+ * ad_marker_send - send marker information/response on a given port
+ * @port: the port we're looking at
+ * @marker: marker data to send
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+static int ad_marker_send(struct port *port, struct bond_marker *marker)
+{
+ struct slave *slave = port->slave;
+ struct sk_buff *skb;
+ struct bond_marker_header *marker_header;
+ int length = sizeof(struct bond_marker_header);
+
+ skb = dev_alloc_skb(length + 16);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_reserve(skb, 16);
+
+ skb->dev = slave->dev;
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = PKT_TYPE_LACPDU;
+
+ marker_header = (struct bond_marker_header *)skb_put(skb, length);
+
+ memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
+ /* Note: source address is set to be the member's PERMANENT address,
+ because we use it to identify loopback MARKERs in receive. */
+ memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
+ marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
+
+ marker_header->marker = *marker; // struct copy
+
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/**
+ * ad_mux_machine - handle a port's mux state machine
+ * @port: the port we're looking at
+ *
+ */
+static void ad_mux_machine(struct port *port)
+{
+ mux_states_t last_state;
+
+ // keep current State Machine state to compare later if it was changed
+ last_state = port->sm_mux_state;
+
+ if (port->sm_vars & AD_PORT_BEGIN) {
+ port->sm_mux_state = AD_MUX_DETACHED; // next state
+ } else {
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ if ((port->sm_vars & AD_PORT_SELECTED)
+ || (port->sm_vars & AD_PORT_STANDBY))
+ /* if SELECTED or STANDBY */
+ port->sm_mux_state = AD_MUX_WAITING; // next state
+ break;
+ case AD_MUX_WAITING:
+ // if SELECTED == FALSE return to DETACH state
+ if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
+ port->sm_vars &= ~AD_PORT_READY_N;
+ // in order to withhold the Selection Logic to check all ports READY_N value
+ // every callback cycle to update ready variable, we check READY_N and update READY here
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+ port->sm_mux_state = AD_MUX_DETACHED; // next state
+ break;
+ }
+
+ // check if the wait_while_timer expired
+ if (port->sm_mux_timer_counter
+ && !(--port->sm_mux_timer_counter))
+ port->sm_vars |= AD_PORT_READY_N;
+
+ // in order to withhold the selection logic to check all ports READY_N value
+ // every callback cycle to update ready variable, we check READY_N and update READY here
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+
+ // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
+ if ((port->sm_vars & AD_PORT_READY)
+ && !port->sm_mux_timer_counter)
+ port->sm_mux_state = AD_MUX_ATTACHED; // next state
+ break;
+ case AD_MUX_ATTACHED:
+ // check also if agg_select_timer expired(so the edable port will take place only after this timer)
+ if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
+ port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
+ } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
+ port->sm_vars &= ~AD_PORT_READY_N;
+ // in order to withhold the selection logic to check all ports READY_N value
+ // every callback cycle to update ready variable, we check READY_N and update READY here
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+ port->sm_mux_state = AD_MUX_DETACHED;// next state
+ }
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
+ !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
+ ) {
+ port->sm_mux_state = AD_MUX_ATTACHED;// next state
+
+ } else {
+ // if port state hasn't changed make
+ // sure that a collecting distributing
+ // port in an active aggregator is enabled
+ if (port->aggregator &&
+ port->aggregator->is_active &&
+ !__port_is_enabled(port)) {
+
+ __enable_port(port);
+ }
+ }
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+
+ // check if the state machine was changed
+ if (port->sm_mux_state != last_state) {
+ pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
+ port->actor_port_number, last_state,
+ port->sm_mux_state);
+ switch (port->sm_mux_state) {
+ case AD_MUX_DETACHED:
+ __detach_bond_from_agg(port);
+ port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
+ ad_disable_collecting_distributing(port);
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ port->ntt = true;
+ break;
+ case AD_MUX_WAITING:
+ port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
+ break;
+ case AD_MUX_ATTACHED:
+ __attach_bond_to_agg(port);
+ port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
+ port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
+ port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
+ ad_disable_collecting_distributing(port);
+ port->ntt = true;
+ break;
+ case AD_MUX_COLLECTING_DISTRIBUTING:
+ port->actor_oper_port_state |= AD_STATE_COLLECTING;
+ port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
+ ad_enable_collecting_distributing(port);
+ port->ntt = true;
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+}
+
+/**
+ * ad_rx_machine - handle a port's rx State Machine
+ * @lacpdu: the lacpdu we've received
+ * @port: the port we're looking at
+ *
+ * If lacpdu arrived, stop previous timer (if exists) and set the next state as
+ * CURRENT. If timer expired set the state machine in the proper state.
+ * In other cases, this function checks if we need to switch to other state.
+ */
+static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
+{
+ rx_states_t last_state;
+
+ // keep current State Machine state to compare later if it was changed
+ last_state = port->sm_rx_state;
+
+ // check if state machine should change state
+ // first, check if port was reinitialized
+ if (port->sm_vars & AD_PORT_BEGIN)
+ /* next state */
+ port->sm_rx_state = AD_RX_INITIALIZE;
+ // check if port is not enabled
+ else if (!(port->sm_vars & AD_PORT_BEGIN)
+ && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
+ /* next state */
+ port->sm_rx_state = AD_RX_PORT_DISABLED;
+ // check if new lacpdu arrived
+ else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
+ port->sm_rx_timer_counter = 0; // zero timer
+ port->sm_rx_state = AD_RX_CURRENT;
+ } else {
+ // if timer is on, and if it is expired
+ if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
+ switch (port->sm_rx_state) {
+ case AD_RX_EXPIRED:
+ port->sm_rx_state = AD_RX_DEFAULTED; // next state
+ break;
+ case AD_RX_CURRENT:
+ port->sm_rx_state = AD_RX_EXPIRED; // next state
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ } else {
+ // if no lacpdu arrived and no timer is on
+ switch (port->sm_rx_state) {
+ case AD_RX_PORT_DISABLED:
+ if (port->sm_vars & AD_PORT_MOVED)
+ port->sm_rx_state = AD_RX_INITIALIZE; // next state
+ else if (port->is_enabled
+ && (port->sm_vars
+ & AD_PORT_LACP_ENABLED))
+ port->sm_rx_state = AD_RX_EXPIRED; // next state
+ else if (port->is_enabled
+ && ((port->sm_vars
+ & AD_PORT_LACP_ENABLED) == 0))
+ port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
+ break;
+ default: //to silence the compiler
+ break;
+
+ }
+ }
+ }
+
+ // check if the State machine was changed or new lacpdu arrived
+ if ((port->sm_rx_state != last_state) || (lacpdu)) {
+ pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
+ port->actor_port_number, last_state,
+ port->sm_rx_state);
+ switch (port->sm_rx_state) {
+ case AD_RX_INITIALIZE:
+ if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ else
+ port->sm_vars |= AD_PORT_LACP_ENABLED;
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ port->sm_vars &= ~AD_PORT_MOVED;
+ port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
+
+ /*- Fall Through -*/
+
+ case AD_RX_PORT_DISABLED:
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ break;
+ case AD_RX_LACP_DISABLED:
+ port->sm_vars &= ~AD_PORT_SELECTED;
+ __record_default(port);
+ port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_EXPIRED:
+ //Reset of the Synchronization flag. (Standard 43.4.12)
+ //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
+ //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
+ port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
+ port->sm_vars &= ~AD_PORT_MATCHED;
+ port->partner_oper.port_state |=
+ AD_STATE_LACP_ACTIVITY;
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
+ port->actor_oper_port_state |= AD_STATE_EXPIRED;
+ break;
+ case AD_RX_DEFAULTED:
+ __update_default_selected(port);
+ __record_default(port);
+ port->sm_vars |= AD_PORT_MATCHED;
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ case AD_RX_CURRENT:
+ // detect loopback situation
+ if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
+ // INFO_RECEIVED_LOOPBACK_FRAMES
+ pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
+ "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
+ port->slave->dev->master->name, port->slave->dev->name);
+ return;
+ }
+ __update_selected(lacpdu, port);
+ __update_ntt(lacpdu, port);
+ __record_pdu(lacpdu, port);
+ port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
+ port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+}
+
+/**
+ * ad_tx_machine - handle a port's tx state machine
+ * @port: the port we're looking at
+ *
+ */
+static void ad_tx_machine(struct port *port)
+{
+ // check if tx timer expired, to verify that we do not send more than 3 packets per second
+ if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
+ // check if there is something to send
+ if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
+ __update_lacpdu_from_port(port);
+
+ if (ad_lacpdu_send(port) >= 0) {
+ pr_debug("Sent LACPDU on port %d\n",
+ port->actor_port_number);
+
+ /* mark ntt as false, so it will not be sent again until
+ demanded */
+ port->ntt = false;
+ }
+ }
+ // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
+ port->sm_tx_timer_counter =
+ ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+ }
+}
+
+/**
+ * ad_periodic_machine - handle a port's periodic state machine
+ * @port: the port we're looking at
+ *
+ * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
+ */
+static void ad_periodic_machine(struct port *port)
+{
+ periodic_states_t last_state;
+
+ // keep current state machine state to compare later if it was changed
+ last_state = port->sm_periodic_state;
+
+ // check if port was reinitialized
+ if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
+ (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
+ ) {
+ port->sm_periodic_state = AD_NO_PERIODIC; // next state
+ }
+ // check if state machine should change state
+ else if (port->sm_periodic_timer_counter) {
+ // check if periodic state machine expired
+ if (!(--port->sm_periodic_timer_counter)) {
+ // if expired then do tx
+ port->sm_periodic_state = AD_PERIODIC_TX; // next state
+ } else {
+ // If not expired, check if there is some new timeout parameter from the partner state
+ switch (port->sm_periodic_state) {
+ case AD_FAST_PERIODIC:
+ if (!(port->partner_oper.port_state
+ & AD_STATE_LACP_TIMEOUT))
+ port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
+ break;
+ case AD_SLOW_PERIODIC:
+ if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
+ // stop current timer
+ port->sm_periodic_timer_counter = 0;
+ port->sm_periodic_state = AD_PERIODIC_TX; // next state
+ }
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+ } else {
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_state = AD_FAST_PERIODIC; // next state
+ break;
+ case AD_PERIODIC_TX:
+ if (!(port->partner_oper.port_state
+ & AD_STATE_LACP_TIMEOUT))
+ port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
+ else
+ port->sm_periodic_state = AD_FAST_PERIODIC; // next state
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+
+ // check if the state machine was changed
+ if (port->sm_periodic_state != last_state) {
+ pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
+ port->actor_port_number, last_state,
+ port->sm_periodic_state);
+ switch (port->sm_periodic_state) {
+ case AD_NO_PERIODIC:
+ port->sm_periodic_timer_counter = 0; // zero timer
+ break;
+ case AD_FAST_PERIODIC:
+ port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
+ break;
+ case AD_SLOW_PERIODIC:
+ port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
+ break;
+ case AD_PERIODIC_TX:
+ port->ntt = true;
+ break;
+ default: //to silence the compiler
+ break;
+ }
+ }
+}
+
+/**
+ * ad_port_selection_logic - select aggregation groups
+ * @port: the port we're looking at
+ *
+ * Select aggregation groups, and assign each port for it's aggregetor. The
+ * selection logic is called in the inititalization (after all the handshkes),
+ * and after every lacpdu receive (if selected is off).
+ */
+static void ad_port_selection_logic(struct port *port)
+{
+ struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
+ struct port *last_port = NULL, *curr_port;
+ int found = 0;
+
+ // if the port is already Selected, do nothing
+ if (port->sm_vars & AD_PORT_SELECTED)
+ return;
+
+ // if the port is connected to other aggregator, detach it
+ if (port->aggregator) {
+ // detach the port from its former aggregator
+ temp_aggregator = port->aggregator;
+ for (curr_port = temp_aggregator->lag_ports; curr_port;
+ last_port = curr_port,
+ curr_port = curr_port->next_port_in_aggregator) {
+ if (curr_port == port) {
+ temp_aggregator->num_of_ports--;
+ if (!last_port) {// if it is the first port attached to the aggregator
+ temp_aggregator->lag_ports =
+ port->next_port_in_aggregator;
+ } else {// not the first port attached to the aggregator
+ last_port->next_port_in_aggregator =
+ port->next_port_in_aggregator;
+ }
+
+ // clear the port's relations to this aggregator
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+ port->actor_port_aggregator_identifier = 0;
+
+ pr_debug("Port %d left LAG %d\n",
+ port->actor_port_number,
+ temp_aggregator->aggregator_identifier);
+ // if the aggregator is empty, clear its parameters, and set it ready to be attached
+ if (!temp_aggregator->lag_ports)
+ ad_clear_agg(temp_aggregator);
+ break;
+ }
+ }
+ if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
+ pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
+ port->slave->dev->master->name,
+ port->actor_port_number,
+ port->slave->dev->name,
+ port->aggregator->aggregator_identifier);
+ }
+ }
+ // search on all aggregators for a suitable aggregator for this port
+ for (aggregator = __get_first_agg(port); aggregator;
+ aggregator = __get_next_agg(aggregator)) {
+
+ // keep a free aggregator for later use(if needed)
+ if (!aggregator->lag_ports) {
+ if (!free_aggregator)
+ free_aggregator = aggregator;
+ continue;
+ }
+ // check if current aggregator suits us
+ if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
+ !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
+ (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
+ (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
+ ) &&
+ ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
+ !aggregator->is_individual) // but is not individual OR
+ )
+ ) {
+ // attach to the founded aggregator
+ port->aggregator = aggregator;
+ port->actor_port_aggregator_identifier =
+ port->aggregator->aggregator_identifier;
+ port->next_port_in_aggregator = aggregator->lag_ports;
+ port->aggregator->num_of_ports++;
+ aggregator->lag_ports = port;
+ pr_debug("Port %d joined LAG %d(existing LAG)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+
+ // mark this port as selected
+ port->sm_vars |= AD_PORT_SELECTED;
+ found = 1;
+ break;
+ }
+ }
+
+ // the port couldn't find an aggregator - attach it to a new aggregator
+ if (!found) {
+ if (free_aggregator) {
+ // assign port a new aggregator
+ port->aggregator = free_aggregator;
+ port->actor_port_aggregator_identifier =
+ port->aggregator->aggregator_identifier;
+
+ // update the new aggregator's parameters
+ // if port was responsed from the end-user
+ if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
+ /* if port is full duplex */
+ port->aggregator->is_individual = false;
+ else
+ port->aggregator->is_individual = true;
+
+ port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
+ port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
+ port->aggregator->partner_system =
+ port->partner_oper.system;
+ port->aggregator->partner_system_priority =
+ port->partner_oper.system_priority;
+ port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
+ port->aggregator->receive_state = 1;
+ port->aggregator->transmit_state = 1;
+ port->aggregator->lag_ports = port;
+ port->aggregator->num_of_ports++;
+
+ // mark this port as selected
+ port->sm_vars |= AD_PORT_SELECTED;
+
+ pr_debug("Port %d joined LAG %d(new LAG)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ } else {
+ pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
+ port->slave->dev->master->name,
+ port->actor_port_number, port->slave->dev->name);
+ }
+ }
+ // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
+ // else set ready=FALSE in all aggregator's ports
+ __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator);
+}
+
+/*
+ * Decide if "agg" is a better choice for the new active aggregator that
+ * the current best, according to the ad_select policy.
+ */
+static struct aggregator *ad_agg_selection_test(struct aggregator *best,
+ struct aggregator *curr)
+{
+ /*
+ * 0. If no best, select current.
+ *
+ * 1. If the current agg is not individual, and the best is
+ * individual, select current.
+ *
+ * 2. If current agg is individual and the best is not, keep best.
+ *
+ * 3. Therefore, current and best are both individual or both not
+ * individual, so:
+ *
+ * 3a. If current agg partner replied, and best agg partner did not,
+ * select current.
+ *
+ * 3b. If current agg partner did not reply and best agg partner
+ * did reply, keep best.
+ *
+ * 4. Therefore, current and best both have partner replies or
+ * both do not, so perform selection policy:
+ *
+ * BOND_AD_COUNT: Select by count of ports. If count is equal,
+ * select by bandwidth.
+ *
+ * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
+ */
+ if (!best)
+ return curr;
+
+ if (!curr->is_individual && best->is_individual)
+ return curr;
+
+ if (curr->is_individual && !best->is_individual)
+ return best;
+
+ if (__agg_has_partner(curr) && !__agg_has_partner(best))
+ return curr;
+
+ if (!__agg_has_partner(curr) && __agg_has_partner(best))
+ return best;
+
+ switch (__get_agg_selection_mode(curr->lag_ports)) {
+ case BOND_AD_COUNT:
+ if (curr->num_of_ports > best->num_of_ports)
+ return curr;
+
+ if (curr->num_of_ports < best->num_of_ports)
+ return best;
+
+ /*FALLTHROUGH*/
+ case BOND_AD_STABLE:
+ case BOND_AD_BANDWIDTH:
+ if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
+ return curr;
+
+ break;
+
+ default:
+ pr_warning("%s: Impossible agg select mode %d\n",
+ curr->slave->dev->master->name,
+ __get_agg_selection_mode(curr->lag_ports));
+ break;
+ }
+
+ return best;
+}
+
+static int agg_device_up(const struct aggregator *agg)
+{
+ struct port *port = agg->lag_ports;
+ if (!port)
+ return 0;
+ return (netif_running(port->slave->dev) &&
+ netif_carrier_ok(port->slave->dev));
+}
+
+/**
+ * ad_agg_selection_logic - select an aggregation group for a team
+ * @aggregator: the aggregator we're looking at
+ *
+ * It is assumed that only one aggregator may be selected for a team.
+ *
+ * The logic of this function is to select the aggregator according to
+ * the ad_select policy:
+ *
+ * BOND_AD_STABLE: select the aggregator with the most ports attached to
+ * it, and to reselect the active aggregator only if the previous
+ * aggregator has no more ports related to it.
+ *
+ * BOND_AD_BANDWIDTH: select the aggregator with the highest total
+ * bandwidth, and reselect whenever a link state change takes place or the
+ * set of slaves in the bond changes.
+ *
+ * BOND_AD_COUNT: select the aggregator with largest number of ports
+ * (slaves), and reselect whenever a link state change takes place or the
+ * set of slaves in the bond changes.
+ *
+ * FIXME: this function MUST be called with the first agg in the bond, or
+ * __get_active_agg() won't work correctly. This function should be better
+ * called with the bond itself, and retrieve the first agg from it.
+ */
+static void ad_agg_selection_logic(struct aggregator *agg)
+{
+ struct aggregator *best, *active, *origin;
+ struct port *port;
+
+ origin = agg;
+ active = __get_active_agg(agg);
+ best = (active && agg_device_up(active)) ? active : NULL;
+
+ do {
+ agg->is_active = 0;
+
+ if (agg->num_of_ports && agg_device_up(agg))
+ best = ad_agg_selection_test(best, agg);
+
+ } while ((agg = __get_next_agg(agg)));
+
+ if (best &&
+ __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
+ /*
+ * For the STABLE policy, don't replace the old active
+ * aggregator if it's still active (it has an answering
+ * partner) or if both the best and active don't have an
+ * answering partner.
+ */
+ if (active && active->lag_ports &&
+ active->lag_ports->is_enabled &&
+ (__agg_has_partner(active) ||
+ (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
+ if (!(!active->actor_oper_aggregator_key &&
+ best->actor_oper_aggregator_key)) {
+ best = NULL;
+ active->is_active = 1;
+ }
+ }
+ }
+
+ if (best && (best == active)) {
+ best = NULL;
+ active->is_active = 1;
+ }
+
+ // if there is new best aggregator, activate it
+ if (best) {
+ pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ best->aggregator_identifier, best->num_of_ports,
+ best->actor_oper_aggregator_key,
+ best->partner_oper_aggregator_key,
+ best->is_individual, best->is_active);
+ pr_debug("best ports %p slave %p %s\n",
+ best->lag_ports, best->slave,
+ best->slave ? best->slave->dev->name : "NULL");
+
+ for (agg = __get_first_agg(best->lag_ports); agg;
+ agg = __get_next_agg(agg)) {
+
+ pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ agg->aggregator_identifier, agg->num_of_ports,
+ agg->actor_oper_aggregator_key,
+ agg->partner_oper_aggregator_key,
+ agg->is_individual, agg->is_active);
+ }
+
+ // check if any partner replys
+ if (best->is_individual) {
+ pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
+ best->slave ? best->slave->dev->master->name : "NULL");
+ }
+
+ best->is_active = 1;
+ pr_debug("LAG %d chosen as the active LAG\n",
+ best->aggregator_identifier);
+ pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
+ best->aggregator_identifier, best->num_of_ports,
+ best->actor_oper_aggregator_key,
+ best->partner_oper_aggregator_key,
+ best->is_individual, best->is_active);
+
+ // disable the ports that were related to the former active_aggregator
+ if (active) {
+ for (port = active->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ __disable_port(port);
+ }
+ }
+ }
+
+ /*
+ * if the selected aggregator is of join individuals
+ * (partner_system is NULL), enable their ports
+ */
+ active = __get_active_agg(origin);
+
+ if (active) {
+ if (!__agg_has_partner(active)) {
+ for (port = active->lag_ports; port;
+ port = port->next_port_in_aggregator) {
+ __enable_port(port);
+ }
+ }
+ }
+
+ if (origin->slave) {
+ struct bonding *bond;
+
+ bond = bond_get_bond_by_slave(origin->slave);
+ if (bond)
+ bond_3ad_set_carrier(bond);
+ }
+}
+
+/**
+ * ad_clear_agg - clear a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static void ad_clear_agg(struct aggregator *aggregator)
+{
+ if (aggregator) {
+ aggregator->is_individual = false;
+ aggregator->actor_admin_aggregator_key = 0;
+ aggregator->actor_oper_aggregator_key = 0;
+ aggregator->partner_system = null_mac_addr;
+ aggregator->partner_system_priority = 0;
+ aggregator->partner_oper_aggregator_key = 0;
+ aggregator->receive_state = 0;
+ aggregator->transmit_state = 0;
+ aggregator->lag_ports = NULL;
+ aggregator->is_active = 0;
+ aggregator->num_of_ports = 0;
+ pr_debug("LAG %d was cleared\n",
+ aggregator->aggregator_identifier);
+ }
+}
+
+/**
+ * ad_initialize_agg - initialize a given aggregator's parameters
+ * @aggregator: the aggregator we're looking at
+ *
+ */
+static void ad_initialize_agg(struct aggregator *aggregator)
+{
+ if (aggregator) {
+ ad_clear_agg(aggregator);
+
+ aggregator->aggregator_mac_address = null_mac_addr;
+ aggregator->aggregator_identifier = 0;
+ aggregator->slave = NULL;
+ }
+}
+
+/**
+ * ad_initialize_port - initialize a given port's parameters
+ * @aggregator: the aggregator we're looking at
+ * @lacp_fast: boolean. whether fast periodic should be used
+ *
+ */
+static void ad_initialize_port(struct port *port, int lacp_fast)
+{
+ static const struct port_params tmpl = {
+ .system_priority = 0xffff,
+ .key = 1,
+ .port_number = 1,
+ .port_priority = 0xff,
+ .port_state = 1,
+ };
+ static const struct lacpdu lacpdu = {
+ .subtype = 0x01,
+ .version_number = 0x01,
+ .tlv_type_actor_info = 0x01,
+ .actor_information_length = 0x14,
+ .tlv_type_partner_info = 0x02,
+ .partner_information_length = 0x14,
+ .tlv_type_collector_info = 0x03,
+ .collector_information_length = 0x10,
+ .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
+ };
+
+ if (port) {
+ port->actor_port_number = 1;
+ port->actor_port_priority = 0xff;
+ port->actor_system = null_mac_addr;
+ port->actor_system_priority = 0xffff;
+ port->actor_port_aggregator_identifier = 0;
+ port->ntt = false;
+ port->actor_admin_port_key = 1;
+ port->actor_oper_port_key = 1;
+ port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
+ port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
+
+ if (lacp_fast)
+ port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+
+ memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
+ memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
+
+ port->is_enabled = true;
+ // ****** private parameters ******
+ port->sm_vars = 0x3;
+ port->sm_rx_state = 0;
+ port->sm_rx_timer_counter = 0;
+ port->sm_periodic_state = 0;
+ port->sm_periodic_timer_counter = 0;
+ port->sm_mux_state = 0;
+ port->sm_mux_timer_counter = 0;
+ port->sm_tx_state = 0;
+ port->sm_tx_timer_counter = 0;
+ port->slave = NULL;
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+ port->transaction_id = 0;
+
+ memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
+ }
+}
+
+/**
+ * ad_enable_collecting_distributing - enable a port's transmit/receive
+ * @port: the port we're looking at
+ *
+ * Enable @port if it's in an active aggregator
+ */
+static void ad_enable_collecting_distributing(struct port *port)
+{
+ if (port->aggregator->is_active) {
+ pr_debug("Enabling port %d(LAG %d)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ __enable_port(port);
+ }
+}
+
+/**
+ * ad_disable_collecting_distributing - disable a port's transmit/receive
+ * @port: the port we're looking at
+ *
+ */
+static void ad_disable_collecting_distributing(struct port *port)
+{
+ if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
+ pr_debug("Disabling port %d(LAG %d)\n",
+ port->actor_port_number,
+ port->aggregator->aggregator_identifier);
+ __disable_port(port);
+ }
+}
+
+#if 0
+/**
+ * ad_marker_info_send - send a marker information frame
+ * @port: the port we're looking at
+ *
+ * This function does nothing since we decided not to implement send and handle
+ * response for marker PDU's, in this stage, but only to respond to marker
+ * information.
+ */
+static void ad_marker_info_send(struct port *port)
+{
+ struct bond_marker marker;
+ u16 index;
+
+ // fill the marker PDU with the appropriate values
+ marker.subtype = 0x02;
+ marker.version_number = 0x01;
+ marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
+ marker.marker_length = 0x16;
+ // convert requester_port to Big Endian
+ marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
+ marker.requester_system = port->actor_system;
+ // convert requester_port(u32) to Big Endian
+ marker.requester_transaction_id =
+ (((++port->transaction_id & 0xFF) << 24)
+ | ((port->transaction_id & 0xFF00) << 8)
+ | ((port->transaction_id & 0xFF0000) >> 8)
+ | ((port->transaction_id & 0xFF000000) >> 24));
+ marker.pad = 0;
+ marker.tlv_type_terminator = 0x00;
+ marker.terminator_length = 0x00;
+ for (index = 0; index < 90; index++)
+ marker.reserved_90[index] = 0;
+
+ // send the marker information
+ if (ad_marker_send(port, &marker) >= 0) {
+ pr_debug("Sent Marker Information on port %d\n",
+ port->actor_port_number);
+ }
+}
+#endif
+
+/**
+ * ad_marker_info_received - handle receive of a Marker information frame
+ * @marker_info: Marker info received
+ * @port: the port we're looking at
+ *
+ */
+static void ad_marker_info_received(struct bond_marker *marker_info,
+ struct port *port)
+{
+ struct bond_marker marker;
+
+ // copy the received marker data to the response marker
+ //marker = *marker_info;
+ memcpy(&marker, marker_info, sizeof(struct bond_marker));
+ // change the marker subtype to marker response
+ marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
+ // send the marker response
+
+ if (ad_marker_send(port, &marker) >= 0) {
+ pr_debug("Sent Marker Response on port %d\n",
+ port->actor_port_number);
+ }
+}
+
+/**
+ * ad_marker_response_received - handle receive of a marker response frame
+ * @marker: marker PDU received
+ * @port: the port we're looking at
+ *
+ * This function does nothing since we decided not to implement send and handle
+ * response for marker PDU's, in this stage, but only to respond to marker
+ * information.
+ */
+static void ad_marker_response_received(struct bond_marker *marker,
+ struct port *port)
+{
+ marker = NULL; /* just to satisfy the compiler */
+ port = NULL; /* just to satisfy the compiler */
+ // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
+}
+
+//////////////////////////////////////////////////////////////////////////////////////
+// ================= AD exported functions to the main bonding code ==================
+//////////////////////////////////////////////////////////////////////////////////////
+
+// Check aggregators status in team every T seconds
+#define AD_AGGREGATOR_SELECTION_TIMER 8
+
+/*
+ * bond_3ad_initiate_agg_selection(struct bonding *bond)
+ *
+ * Set the aggregation selection timer, to initiate an agg selection in
+ * the very near future. Called during first initialization, and during
+ * any down to up transitions of the bond.
+ */
+void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
+{
+ BOND_AD_INFO(bond).agg_select_timer = timeout;
+}
+
+/**
+ * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
+ * @bond: bonding struct to work on
+ * @tick_resolution: tick duration (millisecond resolution)
+ *
+ * Can be called only after the mac address of the bond is set.
+ */
+void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
+{
+ // check that the bond is not initialized yet
+ if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
+ bond->dev->dev_addr)) {
+
+ BOND_AD_INFO(bond).aggregator_identifier = 0;
+
+ BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
+ BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
+
+ // initialize how many times this module is called in one second(should be about every 100ms)
+ ad_ticks_per_sec = tick_resolution;
+
+ bond_3ad_initiate_agg_selection(bond,
+ AD_AGGREGATOR_SELECTION_TIMER *
+ ad_ticks_per_sec);
+ }
+}
+
+/**
+ * bond_3ad_bind_slave - initialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+int bond_3ad_bind_slave(struct slave *slave)
+{
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+ struct port *port;
+ struct aggregator *aggregator;
+
+ if (bond == NULL) {
+ pr_err("%s: The slave %s is not attached to its bond\n",
+ slave->dev->master->name, slave->dev->name);
+ return -1;
+ }
+
+ //check that the slave has not been initialized yet.
+ if (SLAVE_AD_INFO(slave).port.slave != slave) {
+
+ // port initialization
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ ad_initialize_port(port, bond->params.lacp_fast);
+
+ port->slave = slave;
+ port->actor_port_number = SLAVE_AD_INFO(slave).id;
+ // key is determined according to the link speed, duplex and user key(which is yet not supported)
+ // ------------------------------------------------------------
+ // Port key : | User key | Speed |Duplex|
+ // ------------------------------------------------------------
+ // 16 6 1 0
+ port->actor_admin_port_key = 0; // initialize this parameter
+ port->actor_admin_port_key |= __get_duplex(port);
+ port->actor_admin_port_key |= (__get_link_speed(port) << 1);
+ port->actor_oper_port_key = port->actor_admin_port_key;
+ // if the port is not full duplex, then the port should be not lacp Enabled
+ if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
+ port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+ // actor system is the bond's system
+ port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
+ // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
+ port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
+ port->aggregator = NULL;
+ port->next_port_in_aggregator = NULL;
+
+ __disable_port(port);
+ __initialize_port_locks(port);
+
+
+ // aggregator initialization
+ aggregator = &(SLAVE_AD_INFO(slave).aggregator);
+
+ ad_initialize_agg(aggregator);
+
+ aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
+ aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
+ aggregator->slave = slave;
+ aggregator->is_active = 0;
+ aggregator->num_of_ports = 0;
+ }
+
+ return 0;
+}
+
+/**
+ * bond_3ad_unbind_slave - deinitialize a slave's port
+ * @slave: slave struct to work on
+ *
+ * Search for the aggregator that is related to this port, remove the
+ * aggregator and assign another aggregator for other port related to it
+ * (if any), and remove the port.
+ */
+void bond_3ad_unbind_slave(struct slave *slave)
+{
+ struct port *port, *prev_port, *temp_port;
+ struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
+ int select_new_active_agg = 0;
+
+ // find the aggregator related to this slave
+ aggregator = &(SLAVE_AD_INFO(slave).aggregator);
+
+ // find the port related to this slave
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+ pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
+ slave->dev->master->name, slave->dev->name);
+ return;
+ }
+
+ pr_debug("Unbinding Link Aggregation Group %d\n",
+ aggregator->aggregator_identifier);
+
+ /* Tell the partner that this port is not suitable for aggregation */
+ port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
+ __update_lacpdu_from_port(port);
+ ad_lacpdu_send(port);
+
+ // check if this aggregator is occupied
+ if (aggregator->lag_ports) {
+ // check if there are other ports related to this aggregator except
+ // the port related to this slave(thats ensure us that there is a
+ // reason to search for new aggregator, and that we will find one
+ if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
+ // find new aggregator for the related port(s)
+ new_aggregator = __get_first_agg(port);
+ for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
+ // if the new aggregator is empty, or it is connected to our port only
+ if (!new_aggregator->lag_ports
+ || ((new_aggregator->lag_ports == port)
+ && !new_aggregator->lag_ports->next_port_in_aggregator))
+ break;
+ }
+ // if new aggregator found, copy the aggregator's parameters
+ // and connect the related lag_ports to the new aggregator
+ if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
+ pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
+ aggregator->aggregator_identifier,
+ new_aggregator->aggregator_identifier);
+
+ if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
+ pr_info("%s: Removing an active aggregator\n",
+ aggregator->slave->dev->master->name);
+ // select new active aggregator
+ select_new_active_agg = 1;
+ }
+
+ new_aggregator->is_individual = aggregator->is_individual;
+ new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
+ new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
+ new_aggregator->partner_system = aggregator->partner_system;
+ new_aggregator->partner_system_priority = aggregator->partner_system_priority;
+ new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
+ new_aggregator->receive_state = aggregator->receive_state;
+ new_aggregator->transmit_state = aggregator->transmit_state;
+ new_aggregator->lag_ports = aggregator->lag_ports;
+ new_aggregator->is_active = aggregator->is_active;
+ new_aggregator->num_of_ports = aggregator->num_of_ports;
+
+ // update the information that is written on the ports about the aggregator
+ for (temp_port = aggregator->lag_ports; temp_port;
+ temp_port = temp_port->next_port_in_aggregator) {
+ temp_port->aggregator = new_aggregator;
+ temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
+ }
+
+ // clear the aggregator
+ ad_clear_agg(aggregator);
+
+ if (select_new_active_agg)
+ ad_agg_selection_logic(__get_first_agg(port));
+ } else {
+ pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
+ slave->dev->master->name);
+ }
+ } else { // in case that the only port related to this aggregator is the one we want to remove
+ select_new_active_agg = aggregator->is_active;
+ // clear the aggregator
+ ad_clear_agg(aggregator);
+ if (select_new_active_agg) {
+ pr_info("%s: Removing an active aggregator\n",
+ slave->dev->master->name);
+ // select new active aggregator
+ ad_agg_selection_logic(__get_first_agg(port));
+ }
+ }
+ }
+
+ pr_debug("Unbinding port %d\n", port->actor_port_number);
+ // find the aggregator that this port is connected to
+ temp_aggregator = __get_first_agg(port);
+ for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
+ prev_port = NULL;
+ // search the port in the aggregator's related ports
+ for (temp_port = temp_aggregator->lag_ports; temp_port;
+ prev_port = temp_port,
+ temp_port = temp_port->next_port_in_aggregator) {
+ if (temp_port == port) { // the aggregator found - detach the port from this aggregator
+ if (prev_port)
+ prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
+ else
+ temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
+ temp_aggregator->num_of_ports--;
+ if (temp_aggregator->num_of_ports == 0) {
+ select_new_active_agg = temp_aggregator->is_active;
+ // clear the aggregator
+ ad_clear_agg(temp_aggregator);
+ if (select_new_active_agg) {
+ pr_info("%s: Removing an active aggregator\n",
+ slave->dev->master->name);
+ // select new active aggregator
+ ad_agg_selection_logic(__get_first_agg(port));
+ }
+ }
+ break;
+ }
+ }
+ }
+ port->slave = NULL;
+}
+
+/**
+ * bond_3ad_state_machine_handler - handle state machines timeout
+ * @bond: bonding struct to work on
+ *
+ * The state machine handling concept in this module is to check every tick
+ * which state machine should operate any function. The execution order is
+ * round robin, so when we have an interaction between state machines, the
+ * reply of one to each other might be delayed until next tick.
+ *
+ * This function also complete the initialization when the agg_select_timer
+ * times out, and it selects an aggregator for the ports that are yet not
+ * related to any aggregator, and selects the active aggregator for a bond.
+ */
+void bond_3ad_state_machine_handler(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ ad_work.work);
+ struct port *port;
+ struct aggregator *aggregator;
+
+ read_lock(&bond->lock);
+
+ //check if there are any slaves
+ if (bond->slave_cnt == 0)
+ goto re_arm;
+
+ // check if agg_select_timer timer after initialize is timed out
+ if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
+ // select the active aggregator for the bond
+ if ((port = __get_first_port(bond))) {
+ if (!port->slave) {
+ pr_warning("%s: Warning: bond's first port is uninitialized\n",
+ bond->dev->name);
+ goto re_arm;
+ }
+
+ aggregator = __get_first_agg(port);
+ ad_agg_selection_logic(aggregator);
+ }
+ bond_3ad_set_carrier(bond);
+ }
+
+ // for each port run the state machines
+ for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
+ if (!port->slave) {
+ pr_warning("%s: Warning: Found an uninitialized port\n",
+ bond->dev->name);
+ goto re_arm;
+ }
+
+ /* Lock around state machines to protect data accessed
+ * by all (e.g., port->sm_vars). ad_rx_machine may run
+ * concurrently due to incoming LACPDU.
+ */
+ __get_state_machine_lock(port);
+
+ ad_rx_machine(NULL, port);
+ ad_periodic_machine(port);
+ ad_port_selection_logic(port);
+ ad_mux_machine(port);
+ ad_tx_machine(port);
+
+ // turn off the BEGIN bit, since we already handled it
+ if (port->sm_vars & AD_PORT_BEGIN)
+ port->sm_vars &= ~AD_PORT_BEGIN;
+
+ __release_state_machine_lock(port);
+ }
+
+re_arm:
+ queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
+
+ read_unlock(&bond->lock);
+}
+
+/**
+ * bond_3ad_rx_indication - handle a received frame
+ * @lacpdu: received lacpdu
+ * @slave: slave struct to work on
+ * @length: length of the data received
+ *
+ * It is assumed that frames that were sent on this NIC don't returned as new
+ * received frames (loopback). Since only the payload is given to this
+ * function, it check for loopback.
+ */
+static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
+{
+ struct port *port;
+ int ret = RX_HANDLER_ANOTHER;
+
+ if (length >= sizeof(struct lacpdu)) {
+
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ if (!port->slave) {
+ pr_warning("%s: Warning: port of slave %s is uninitialized\n",
+ slave->dev->name, slave->dev->master->name);
+ return ret;
+ }
+
+ switch (lacpdu->subtype) {
+ case AD_TYPE_LACPDU:
+ ret = RX_HANDLER_CONSUMED;
+ pr_debug("Received LACPDU on port %d\n",
+ port->actor_port_number);
+ /* Protect against concurrent state machines */
+ __get_state_machine_lock(port);
+ ad_rx_machine(lacpdu, port);
+ __release_state_machine_lock(port);
+ break;
+
+ case AD_TYPE_MARKER:
+ ret = RX_HANDLER_CONSUMED;
+ // No need to convert fields to Little Endian since we don't use the marker's fields.
+
+ switch (((struct bond_marker *)lacpdu)->tlv_type) {
+ case AD_MARKER_INFORMATION_SUBTYPE:
+ pr_debug("Received Marker Information on port %d\n",
+ port->actor_port_number);
+ ad_marker_info_received((struct bond_marker *)lacpdu, port);
+ break;
+
+ case AD_MARKER_RESPONSE_SUBTYPE:
+ pr_debug("Received Marker Response on port %d\n",
+ port->actor_port_number);
+ ad_marker_response_received((struct bond_marker *)lacpdu, port);
+ break;
+
+ default:
+ pr_debug("Received an unknown Marker subtype on slot %d\n",
+ port->actor_port_number);
+ }
+ }
+ }
+ return ret;
+}
+
+/**
+ * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_speed_changed(struct slave *slave)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+ pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
+ slave->dev->master->name, slave->dev->name);
+ return;
+ }
+
+ port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
+ port->actor_oper_port_key = port->actor_admin_port_key |=
+ (__get_link_speed(port) << 1);
+ pr_debug("Port %d changed speed\n", port->actor_port_number);
+ // there is no need to reselect a new aggregator, just signal the
+ // state machines to reinitialize
+ port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
+ * @slave: slave struct to work on
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_adapter_duplex_changed(struct slave *slave)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+ pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
+ slave->dev->master->name, slave->dev->name);
+ return;
+ }
+
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+ port->actor_oper_port_key = port->actor_admin_port_key |=
+ __get_duplex(port);
+ pr_debug("Port %d changed duplex\n", port->actor_port_number);
+ // there is no need to reselect a new aggregator, just signal the
+ // state machines to reinitialize
+ port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/**
+ * bond_3ad_handle_link_change - handle a slave's link status change indication
+ * @slave: slave struct to work on
+ * @status: whether the link is now up or down
+ *
+ * Handle reselection of aggregator (if needed) for this port.
+ */
+void bond_3ad_handle_link_change(struct slave *slave, char link)
+{
+ struct port *port;
+
+ port = &(SLAVE_AD_INFO(slave).port);
+
+ // if slave is null, the whole port is not initialized
+ if (!port->slave) {
+ pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
+ slave->dev->master->name, slave->dev->name);
+ return;
+ }
+
+ // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
+ // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
+ if (link == BOND_LINK_UP) {
+ port->is_enabled = true;
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+ port->actor_oper_port_key = port->actor_admin_port_key |=
+ __get_duplex(port);
+ port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
+ port->actor_oper_port_key = port->actor_admin_port_key |=
+ (__get_link_speed(port) << 1);
+ } else {
+ /* link has failed */
+ port->is_enabled = false;
+ port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
+ port->actor_oper_port_key = (port->actor_admin_port_key &=
+ ~AD_SPEED_KEY_BITS);
+ }
+ //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
+ // there is no need to reselect a new aggregator, just signal the
+ // state machines to reinitialize
+ port->sm_vars |= AD_PORT_BEGIN;
+}
+
+/*
+ * set link state for bonding master: if we have an active
+ * aggregator, we're up, if not, we're down. Presumes that we cannot
+ * have an active aggregator if there are no slaves with link up.
+ *
+ * This behavior complies with IEEE 802.3 section 43.3.9.
+ *
+ * Called by bond_set_carrier(). Return zero if carrier state does not
+ * change, nonzero if it does.
+ */
+int bond_3ad_set_carrier(struct bonding *bond)
+{
+ struct aggregator *active;
+
+ active = __get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator));
+ if (active) {
+ /* are enough slaves available to consider link up? */
+ if (active->num_of_ports < bond->params.min_links) {
+ if (netif_carrier_ok(bond->dev)) {
+ netif_carrier_off(bond->dev);
+ return 1;
+ }
+ } else if (!netif_carrier_ok(bond->dev)) {
+ netif_carrier_on(bond->dev);
+ return 1;
+ }
+ return 0;
+ }
+
+ if (netif_carrier_ok(bond->dev)) {
+ netif_carrier_off(bond->dev);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * bond_3ad_get_active_agg_info - get information of the active aggregator
+ * @bond: bonding struct to work on
+ * @ad_info: ad_info struct to fill with the bond's info
+ *
+ * Returns: 0 on success
+ * < 0 on error
+ */
+int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
+{
+ struct aggregator *aggregator = NULL;
+ struct port *port;
+
+ for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
+ if (port->aggregator && port->aggregator->is_active) {
+ aggregator = port->aggregator;
+ break;
+ }
+ }
+
+ if (aggregator) {
+ ad_info->aggregator_id = aggregator->aggregator_identifier;
+ ad_info->ports = aggregator->num_of_ports;
+ ad_info->actor_key = aggregator->actor_oper_aggregator_key;
+ ad_info->partner_key = aggregator->partner_oper_aggregator_key;
+ memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
+ return 0;
+ }
+
+ return -1;
+}
+
+int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
+{
+ struct slave *slave, *start_at;
+ struct bonding *bond = netdev_priv(dev);
+ int slave_agg_no;
+ int slaves_in_agg;
+ int agg_id;
+ int i;
+ struct ad_info ad_info;
+ int res = 1;
+
+ if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+ pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n",
+ dev->name);
+ goto out;
+ }
+
+ slaves_in_agg = ad_info.ports;
+ agg_id = ad_info.aggregator_id;
+
+ if (slaves_in_agg == 0) {
+ /*the aggregator is empty*/
+ pr_debug("%s: Error: active aggregator is empty\n", dev->name);
+ goto out;
+ }
+
+ slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
+
+ bond_for_each_slave(bond, slave, i) {
+ struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
+
+ if (agg && (agg->aggregator_identifier == agg_id)) {
+ slave_agg_no--;
+ if (slave_agg_no < 0)
+ break;
+ }
+ }
+
+ if (slave_agg_no >= 0) {
+ pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
+ dev->name, agg_id);
+ goto out;
+ }
+
+ start_at = slave;
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ int slave_agg_id = 0;
+ struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
+
+ if (agg)
+ slave_agg_id = agg->aggregator_identifier;
+
+ if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
+ res = bond_dev_queue_xmit(bond, skb, slave->dev);
+ break;
+ }
+ }
+
+out:
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave)
+{
+ int ret = RX_HANDLER_ANOTHER;
+ if (skb->protocol != PKT_TYPE_LACPDU)
+ return ret;
+
+ if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
+ return ret;
+
+ read_lock(&bond->lock);
+ ret = bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
+ read_unlock(&bond->lock);
+ return ret;
+}
+
+/*
+ * When modify lacp_rate parameter via sysfs,
+ * update actor_oper_port_state of each port.
+ *
+ * Hold slave->state_machine_lock,
+ * so we can modify port->actor_oper_port_state,
+ * no matter bond is up or down.
+ */
+void bond_3ad_update_lacp_rate(struct bonding *bond)
+{
+ int i;
+ struct slave *slave;
+ struct port *port = NULL;
+ int lacp_fast;
+
+ read_lock(&bond->lock);
+ lacp_fast = bond->params.lacp_fast;
+
+ bond_for_each_slave(bond, slave, i) {
+ port = &(SLAVE_AD_INFO(slave).port);
+ __get_state_machine_lock(port);
+ if (lacp_fast)
+ port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
+ else
+ port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
+ __release_state_machine_lock(port);
+ }
+
+ read_unlock(&bond->lock);
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_3ad.h b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_3ad.h
new file mode 100644
index 0000000..656b2f5
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_3ad.h
@@ -0,0 +1,283 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef __BOND_3AD_H__
+#define __BOND_3AD_H__
+
+#include <asm/byteorder.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/if_ether.h>
+
+// General definitions
+#define PKT_TYPE_LACPDU cpu_to_be16(ETH_P_SLOW)
+#define AD_TIMER_INTERVAL 100 /*msec*/
+
+#define MULTICAST_LACPDU_ADDR {0x01, 0x80, 0xC2, 0x00, 0x00, 0x02}
+
+#define AD_LACP_SLOW 0
+#define AD_LACP_FAST 1
+
+typedef struct mac_addr {
+ u8 mac_addr_value[ETH_ALEN];
+} __packed mac_addr_t;
+
+enum {
+ BOND_AD_STABLE = 0,
+ BOND_AD_BANDWIDTH = 1,
+ BOND_AD_COUNT = 2,
+};
+
+// rx machine states(43.4.11 in the 802.3ad standard)
+typedef enum {
+ AD_RX_DUMMY,
+ AD_RX_INITIALIZE, // rx Machine
+ AD_RX_PORT_DISABLED, // rx Machine
+ AD_RX_LACP_DISABLED, // rx Machine
+ AD_RX_EXPIRED, // rx Machine
+ AD_RX_DEFAULTED, // rx Machine
+ AD_RX_CURRENT // rx Machine
+} rx_states_t;
+
+// periodic machine states(43.4.12 in the 802.3ad standard)
+typedef enum {
+ AD_PERIODIC_DUMMY,
+ AD_NO_PERIODIC, // periodic machine
+ AD_FAST_PERIODIC, // periodic machine
+ AD_SLOW_PERIODIC, // periodic machine
+ AD_PERIODIC_TX // periodic machine
+} periodic_states_t;
+
+// mux machine states(43.4.13 in the 802.3ad standard)
+typedef enum {
+ AD_MUX_DUMMY,
+ AD_MUX_DETACHED, // mux machine
+ AD_MUX_WAITING, // mux machine
+ AD_MUX_ATTACHED, // mux machine
+ AD_MUX_COLLECTING_DISTRIBUTING // mux machine
+} mux_states_t;
+
+// tx machine states(43.4.15 in the 802.3ad standard)
+typedef enum {
+ AD_TX_DUMMY,
+ AD_TRANSMIT // tx Machine
+} tx_states_t;
+
+// rx indication types
+typedef enum {
+ AD_TYPE_LACPDU = 1, // type lacpdu
+ AD_TYPE_MARKER // type marker
+} pdu_type_t;
+
+// rx marker indication types
+typedef enum {
+ AD_MARKER_INFORMATION_SUBTYPE = 1, // marker imformation subtype
+ AD_MARKER_RESPONSE_SUBTYPE // marker response subtype
+} bond_marker_subtype_t;
+
+// timers types(43.4.9 in the 802.3ad standard)
+typedef enum {
+ AD_CURRENT_WHILE_TIMER,
+ AD_ACTOR_CHURN_TIMER,
+ AD_PERIODIC_TIMER,
+ AD_PARTNER_CHURN_TIMER,
+ AD_WAIT_WHILE_TIMER
+} ad_timers_t;
+
+#pragma pack(1)
+
+// Link Aggregation Control Protocol(LACP) data unit structure(43.4.2.2 in the 802.3ad standard)
+typedef struct lacpdu {
+ u8 subtype; // = LACP(= 0x01)
+ u8 version_number;
+ u8 tlv_type_actor_info; // = actor information(type/length/value)
+ u8 actor_information_length; // = 20
+ __be16 actor_system_priority;
+ struct mac_addr actor_system;
+ __be16 actor_key;
+ __be16 actor_port_priority;
+ __be16 actor_port;
+ u8 actor_state;
+ u8 reserved_3_1[3]; // = 0
+ u8 tlv_type_partner_info; // = partner information
+ u8 partner_information_length; // = 20
+ __be16 partner_system_priority;
+ struct mac_addr partner_system;
+ __be16 partner_key;
+ __be16 partner_port_priority;
+ __be16 partner_port;
+ u8 partner_state;
+ u8 reserved_3_2[3]; // = 0
+ u8 tlv_type_collector_info; // = collector information
+ u8 collector_information_length; // = 16
+ __be16 collector_max_delay;
+ u8 reserved_12[12];
+ u8 tlv_type_terminator; // = terminator
+ u8 terminator_length; // = 0
+ u8 reserved_50[50]; // = 0
+} __packed lacpdu_t;
+
+typedef struct lacpdu_header {
+ struct ethhdr hdr;
+ struct lacpdu lacpdu;
+} __packed lacpdu_header_t;
+
+// Marker Protocol Data Unit(PDU) structure(43.5.3.2 in the 802.3ad standard)
+typedef struct bond_marker {
+ u8 subtype; // = 0x02 (marker PDU)
+ u8 version_number; // = 0x01
+ u8 tlv_type; // = 0x01 (marker information)
+ // = 0x02 (marker response information)
+ u8 marker_length; // = 0x16
+ u16 requester_port; // The number assigned to the port by the requester
+ struct mac_addr requester_system; // The requester's system id
+ u32 requester_transaction_id; // The transaction id allocated by the requester,
+ u16 pad; // = 0
+ u8 tlv_type_terminator; // = 0x00
+ u8 terminator_length; // = 0x00
+ u8 reserved_90[90]; // = 0
+} __packed bond_marker_t;
+
+typedef struct bond_marker_header {
+ struct ethhdr hdr;
+ struct bond_marker marker;
+} __packed bond_marker_header_t;
+
+#pragma pack()
+
+struct slave;
+struct bonding;
+struct ad_info;
+struct port;
+
+#ifdef __ia64__
+#pragma pack(8)
+#endif
+
+// aggregator structure(43.4.5 in the 802.3ad standard)
+typedef struct aggregator {
+ struct mac_addr aggregator_mac_address;
+ u16 aggregator_identifier;
+ bool is_individual;
+ u16 actor_admin_aggregator_key;
+ u16 actor_oper_aggregator_key;
+ struct mac_addr partner_system;
+ u16 partner_system_priority;
+ u16 partner_oper_aggregator_key;
+ u16 receive_state; // BOOLEAN
+ u16 transmit_state; // BOOLEAN
+ struct port *lag_ports;
+ // ****** PRIVATE PARAMETERS ******
+ struct slave *slave; // pointer to the bond slave that this aggregator belongs to
+ u16 is_active; // BOOLEAN. Indicates if this aggregator is active
+ u16 num_of_ports;
+} aggregator_t;
+
+struct port_params {
+ struct mac_addr system;
+ u16 system_priority;
+ u16 key;
+ u16 port_number;
+ u16 port_priority;
+ u16 port_state;
+};
+
+// port structure(43.4.6 in the 802.3ad standard)
+typedef struct port {
+ u16 actor_port_number;
+ u16 actor_port_priority;
+ struct mac_addr actor_system; // This parameter is added here although it is not specified in the standard, just for simplification
+ u16 actor_system_priority; // This parameter is added here although it is not specified in the standard, just for simplification
+ u16 actor_port_aggregator_identifier;
+ bool ntt;
+ u16 actor_admin_port_key;
+ u16 actor_oper_port_key;
+ u8 actor_admin_port_state;
+ u8 actor_oper_port_state;
+
+ struct port_params partner_admin;
+ struct port_params partner_oper;
+
+ bool is_enabled;
+
+ // ****** PRIVATE PARAMETERS ******
+ u16 sm_vars; // all state machines variables for this port
+ rx_states_t sm_rx_state; // state machine rx state
+ u16 sm_rx_timer_counter; // state machine rx timer counter
+ periodic_states_t sm_periodic_state;// state machine periodic state
+ u16 sm_periodic_timer_counter; // state machine periodic timer counter
+ mux_states_t sm_mux_state; // state machine mux state
+ u16 sm_mux_timer_counter; // state machine mux timer counter
+ tx_states_t sm_tx_state; // state machine tx state
+ u16 sm_tx_timer_counter; // state machine tx timer counter(allways on - enter to transmit state 3 time per second)
+ struct slave *slave; // pointer to the bond slave that this port belongs to
+ struct aggregator *aggregator; // pointer to an aggregator that this port related to
+ struct port *next_port_in_aggregator; // Next port on the linked list of the parent aggregator
+ u32 transaction_id; // continuous number for identification of Marker PDU's;
+ struct lacpdu lacpdu; // the lacpdu that will be sent for this port
+} port_t;
+
+// system structure
+struct ad_system {
+ u16 sys_priority;
+ struct mac_addr sys_mac_addr;
+};
+
+#ifdef __ia64__
+#pragma pack()
+#endif
+
+// ================= AD Exported structures to the main bonding code ==================
+#define BOND_AD_INFO(bond) ((bond)->ad_info)
+#define SLAVE_AD_INFO(slave) ((slave)->ad_info)
+
+struct ad_bond_info {
+ struct ad_system system; /* 802.3ad system structure */
+ u32 agg_select_timer; // Timer to select aggregator after all adapter's hand shakes
+ u16 aggregator_identifier;
+};
+
+struct ad_slave_info {
+ struct aggregator aggregator; // 802.3ad aggregator structure
+ struct port port; // 802.3ad port structure
+ spinlock_t state_machine_lock; /* mutex state machines vs.
+ incoming LACPDU */
+ u16 id;
+};
+
+// ================= AD Exported functions to the main bonding code ==================
+void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
+int bond_3ad_bind_slave(struct slave *slave);
+void bond_3ad_unbind_slave(struct slave *slave);
+void bond_3ad_state_machine_handler(struct work_struct *);
+void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout);
+void bond_3ad_adapter_speed_changed(struct slave *slave);
+void bond_3ad_adapter_duplex_changed(struct slave *slave);
+void bond_3ad_handle_link_change(struct slave *slave, char link);
+int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info);
+int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev);
+int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave);
+int bond_3ad_set_carrier(struct bonding *bond);
+void bond_3ad_update_lacp_rate(struct bonding *bond);
+#endif //__BOND_3AD_H__
+
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_alb.c b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_alb.c
new file mode 100644
index 0000000..b6ed7e9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_alb.c
@@ -0,0 +1,1728 @@
+/*
+ * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/pkt_sched.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_bonding.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include <net/ipx.h>
+#include <net/arp.h>
+#include <net/ipv6.h>
+#include <asm/byteorder.h>
+#include "bonding.h"
+#include "bond_alb.h"
+
+
+
+#ifndef __long_aligned
+#define __long_aligned __attribute__((aligned((sizeof(long)))))
+#endif
+static const u8 mac_bcast[ETH_ALEN] __long_aligned = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};
+static const u8 mac_v6_allmcast[ETH_ALEN] __long_aligned = {
+ 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
+};
+static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
+
+#pragma pack(1)
+struct learning_pkt {
+ u8 mac_dst[ETH_ALEN];
+ u8 mac_src[ETH_ALEN];
+ __be16 type;
+ u8 padding[ETH_ZLEN - ETH_HLEN];
+};
+
+struct arp_pkt {
+ __be16 hw_addr_space;
+ __be16 prot_addr_space;
+ u8 hw_addr_len;
+ u8 prot_addr_len;
+ __be16 op_code;
+ u8 mac_src[ETH_ALEN]; /* sender hardware address */
+ __be32 ip_src; /* sender IP address */
+ u8 mac_dst[ETH_ALEN]; /* target hardware address */
+ __be32 ip_dst; /* target IP address */
+};
+#pragma pack()
+
+static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
+{
+ return (struct arp_pkt *)skb_network_header(skb);
+}
+
+/* Forward declaration */
+static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]);
+
+static inline u8 _simple_hash(const u8 *hash_start, int hash_size)
+{
+ int i;
+ u8 hash = 0;
+
+ for (i = 0; i < hash_size; i++) {
+ hash ^= hash_start[i];
+ }
+
+ return hash;
+}
+
+/*********************** tlb specific functions ***************************/
+
+static inline void _lock_tx_hashtbl_bh(struct bonding *bond)
+{
+ spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
+}
+
+static inline void _unlock_tx_hashtbl_bh(struct bonding *bond)
+{
+ spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
+}
+
+static inline void _lock_tx_hashtbl(struct bonding *bond)
+{
+ spin_lock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
+}
+
+static inline void _unlock_tx_hashtbl(struct bonding *bond)
+{
+ spin_unlock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));
+}
+
+/* Caller must hold tx_hashtbl lock */
+static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)
+{
+ if (save_load) {
+ entry->load_history = 1 + entry->tx_bytes /
+ BOND_TLB_REBALANCE_INTERVAL;
+ entry->tx_bytes = 0;
+ }
+
+ entry->tx_slave = NULL;
+ entry->next = TLB_NULL_INDEX;
+ entry->prev = TLB_NULL_INDEX;
+}
+
+static inline void tlb_init_slave(struct slave *slave)
+{
+ SLAVE_TLB_INFO(slave).load = 0;
+ SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;
+}
+
+/* Caller must hold bond lock for read, BH disabled */
+static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,
+ int save_load)
+{
+ struct tlb_client_info *tx_hash_table;
+ u32 index;
+
+ /* clear slave from tx_hashtbl */
+ tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
+
+ /* skip this if we've already freed the tx hash table */
+ if (tx_hash_table) {
+ index = SLAVE_TLB_INFO(slave).head;
+ while (index != TLB_NULL_INDEX) {
+ u32 next_index = tx_hash_table[index].next;
+ tlb_init_table_entry(&tx_hash_table[index], save_load);
+ index = next_index;
+ }
+ }
+
+ tlb_init_slave(slave);
+}
+
+/* Caller must hold bond lock for read */
+static void tlb_clear_slave(struct bonding *bond, struct slave *slave,
+ int save_load)
+{
+ _lock_tx_hashtbl_bh(bond);
+ __tlb_clear_slave(bond, slave, save_load);
+ _unlock_tx_hashtbl_bh(bond);
+}
+
+/* Must be called before starting the monitor timer */
+static int tlb_initialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
+ struct tlb_client_info *new_hashtbl;
+ int i;
+
+ new_hashtbl = kzalloc(size, GFP_KERNEL);
+ if (!new_hashtbl)
+ return -1;
+
+ _lock_tx_hashtbl_bh(bond);
+
+ bond_info->tx_hashtbl = new_hashtbl;
+
+ for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) {
+ tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);
+ }
+
+ _unlock_tx_hashtbl_bh(bond);
+
+ return 0;
+}
+
+/* Must be called only after all slaves have been released */
+static void tlb_deinitialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ _lock_tx_hashtbl_bh(bond);
+
+ kfree(bond_info->tx_hashtbl);
+ bond_info->tx_hashtbl = NULL;
+
+ _unlock_tx_hashtbl_bh(bond);
+}
+
+static long long compute_gap(struct slave *slave)
+{
+ return (s64) (slave->speed << 20) - /* Convert to Megabit per sec */
+ (s64) (SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */
+}
+
+/* Caller must hold bond lock for read */
+static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
+{
+ struct slave *slave, *least_loaded;
+ long long max_gap;
+ int i;
+
+ least_loaded = NULL;
+ max_gap = LLONG_MIN;
+
+ /* Find the slave with the largest gap */
+ bond_for_each_slave(bond, slave, i) {
+ if (SLAVE_IS_OK(slave)) {
+ long long gap = compute_gap(slave);
+
+ if (max_gap < gap) {
+ least_loaded = slave;
+ max_gap = gap;
+ }
+ }
+ }
+
+ return least_loaded;
+}
+
+static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,
+ u32 skb_len)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct tlb_client_info *hash_table;
+ struct slave *assigned_slave;
+
+ hash_table = bond_info->tx_hashtbl;
+ assigned_slave = hash_table[hash_index].tx_slave;
+ if (!assigned_slave) {
+ assigned_slave = tlb_get_least_loaded_slave(bond);
+
+ if (assigned_slave) {
+ struct tlb_slave_info *slave_info =
+ &(SLAVE_TLB_INFO(assigned_slave));
+ u32 next_index = slave_info->head;
+
+ hash_table[hash_index].tx_slave = assigned_slave;
+ hash_table[hash_index].next = next_index;
+ hash_table[hash_index].prev = TLB_NULL_INDEX;
+
+ if (next_index != TLB_NULL_INDEX) {
+ hash_table[next_index].prev = hash_index;
+ }
+
+ slave_info->head = hash_index;
+ slave_info->load +=
+ hash_table[hash_index].load_history;
+ }
+ }
+
+ if (assigned_slave) {
+ hash_table[hash_index].tx_bytes += skb_len;
+ }
+
+ return assigned_slave;
+}
+
+/* Caller must hold bond lock for read */
+static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,
+ u32 skb_len)
+{
+ struct slave *tx_slave;
+ /*
+ * We don't need to disable softirq here, becase
+ * tlb_choose_channel() is only called by bond_alb_xmit()
+ * which already has softirq disabled.
+ */
+ _lock_tx_hashtbl(bond);
+ tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);
+ _unlock_tx_hashtbl(bond);
+ return tx_slave;
+}
+
+/*********************** rlb specific functions ***************************/
+static inline void _lock_rx_hashtbl_bh(struct bonding *bond)
+{
+ spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+}
+
+static inline void _unlock_rx_hashtbl_bh(struct bonding *bond)
+{
+ spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+}
+
+static inline void _lock_rx_hashtbl(struct bonding *bond)
+{
+ spin_lock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+}
+
+static inline void _unlock_rx_hashtbl(struct bonding *bond)
+{
+ spin_unlock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+}
+
+/* when an ARP REPLY is received from a client update its info
+ * in the rx_hashtbl
+ */
+static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src));
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if ((client_info->assigned) &&
+ (client_info->ip_src == arp->ip_dst) &&
+ (client_info->ip_dst == arp->ip_src) &&
+ (compare_ether_addr_64bits(client_info->mac_dst, arp->mac_src))) {
+ /* update the clients MAC address */
+ memcpy(client_info->mac_dst, arp->mac_src, ETH_ALEN);
+ client_info->ntt = 1;
+ bond_info->rx_ntt = 1;
+ }
+
+ _unlock_rx_hashtbl_bh(bond);
+}
+
+static int rlb_arp_recv(struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave)
+{
+ struct arp_pkt *arp;
+
+ if (skb->protocol != cpu_to_be16(ETH_P_ARP))
+ goto out;
+
+ arp = (struct arp_pkt *) skb->data;
+ if (!arp) {
+ pr_debug("Packet has no ARP data\n");
+ goto out;
+ }
+
+ if (!pskb_may_pull(skb, arp_hdr_len(bond->dev)))
+ goto out;
+
+ if (skb->len < sizeof(struct arp_pkt)) {
+ pr_debug("Packet is too small to be an ARP\n");
+ goto out;
+ }
+
+ if (arp->op_code == htons(ARPOP_REPLY)) {
+ /* update rx hash table for this ARP */
+ rlb_update_entry_from_arp(bond, arp);
+ pr_debug("Server received an ARP Reply from client\n");
+ }
+out:
+ return RX_HANDLER_ANOTHER;
+}
+
+/* Caller must hold bond lock for read */
+static struct slave *rlb_next_rx_slave(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *rx_slave, *slave, *start_at;
+ int i = 0;
+
+ if (bond_info->next_rx_slave) {
+ start_at = bond_info->next_rx_slave;
+ } else {
+ start_at = bond->first_slave;
+ }
+
+ rx_slave = NULL;
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (SLAVE_IS_OK(slave)) {
+ if (!rx_slave) {
+ rx_slave = slave;
+ } else if (slave->speed > rx_slave->speed) {
+ rx_slave = slave;
+ }
+ }
+ }
+
+ if (rx_slave) {
+ bond_info->next_rx_slave = rx_slave->next;
+ }
+
+ return rx_slave;
+}
+
+/* teach the switch the mac of a disabled slave
+ * on the primary for fault tolerance
+ *
+ * Caller must hold bond->curr_slave_lock for write or bond lock for write
+ */
+static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[])
+{
+ if (!bond->curr_active_slave) {
+ return;
+ }
+
+ if (!bond->alb_info.primary_is_promisc) {
+ if (!dev_set_promiscuity(bond->curr_active_slave->dev, 1))
+ bond->alb_info.primary_is_promisc = 1;
+ else
+ bond->alb_info.primary_is_promisc = 0;
+ }
+
+ bond->alb_info.rlb_promisc_timeout_counter = 0;
+
+ alb_send_learning_packets(bond->curr_active_slave, addr);
+}
+
+/* slave being removed should not be active at this point
+ *
+ * Caller must hold bond lock for read
+ */
+static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *rx_hash_table;
+ u32 index, next_index;
+
+ /* clear slave from rx_hashtbl */
+ _lock_rx_hashtbl_bh(bond);
+
+ rx_hash_table = bond_info->rx_hashtbl;
+ index = bond_info->rx_hashtbl_head;
+ for (; index != RLB_NULL_INDEX; index = next_index) {
+ next_index = rx_hash_table[index].next;
+ if (rx_hash_table[index].slave == slave) {
+ struct slave *assigned_slave = rlb_next_rx_slave(bond);
+
+ if (assigned_slave) {
+ rx_hash_table[index].slave = assigned_slave;
+ if (compare_ether_addr_64bits(rx_hash_table[index].mac_dst,
+ mac_bcast)) {
+ bond_info->rx_hashtbl[index].ntt = 1;
+ bond_info->rx_ntt = 1;
+ /* A slave has been removed from the
+ * table because it is either disabled
+ * or being released. We must retry the
+ * update to avoid clients from not
+ * being updated & disconnecting when
+ * there is stress
+ */
+ bond_info->rlb_update_retry_counter =
+ RLB_UPDATE_RETRY;
+ }
+ } else { /* there is no active slave */
+ rx_hash_table[index].slave = NULL;
+ }
+ }
+ }
+
+ _unlock_rx_hashtbl_bh(bond);
+
+ write_lock_bh(&bond->curr_slave_lock);
+
+ if (slave != bond->curr_active_slave) {
+ rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr);
+ }
+
+ write_unlock_bh(&bond->curr_slave_lock);
+}
+
+static void rlb_update_client(struct rlb_client_info *client_info)
+{
+ int i;
+
+ if (!client_info->slave) {
+ return;
+ }
+
+ for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
+ struct sk_buff *skb;
+
+ skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
+ client_info->ip_dst,
+ client_info->slave->dev,
+ client_info->ip_src,
+ client_info->mac_dst,
+ client_info->slave->dev->dev_addr,
+ client_info->mac_dst);
+ if (!skb) {
+ pr_err("%s: Error: failed to create an ARP packet\n",
+ client_info->slave->dev->master->name);
+ continue;
+ }
+
+ skb->dev = client_info->slave->dev;
+
+ if (client_info->tag) {
+ skb = vlan_put_tag(skb, client_info->vlan_id);
+ if (!skb) {
+ pr_err("%s: Error: failed to insert VLAN tag\n",
+ client_info->slave->dev->master->name);
+ continue;
+ }
+ }
+
+ arp_xmit(skb);
+ }
+}
+
+/* sends ARP REPLIES that update the clients that need updating */
+static void rlb_update_rx_clients(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ hash_index = bond_info->rx_hashtbl_head;
+ for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ if (client_info->ntt) {
+ rlb_update_client(client_info);
+ if (bond_info->rlb_update_retry_counter == 0) {
+ client_info->ntt = 0;
+ }
+ }
+ }
+
+ /* do not update the entries again until this counter is zero so that
+ * not to confuse the clients.
+ */
+ bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;
+
+ _unlock_rx_hashtbl_bh(bond);
+}
+
+/* The slave was assigned a new mac address - update the clients */
+static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ int ntt = 0;
+ u32 hash_index;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ hash_index = bond_info->rx_hashtbl_head;
+ for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if ((client_info->slave == slave) &&
+ compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) {
+ client_info->ntt = 1;
+ ntt = 1;
+ }
+ }
+
+ // update the team's flag only after the whole iteration
+ if (ntt) {
+ bond_info->rx_ntt = 1;
+ //fasten the change
+ bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;
+ }
+
+ _unlock_rx_hashtbl_bh(bond);
+}
+
+/* mark all clients using src_ip to be updated */
+static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ _lock_rx_hashtbl(bond);
+
+ hash_index = bond_info->rx_hashtbl_head;
+ for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if (!client_info->slave) {
+ pr_err("%s: Error: found a client with no channel in the client's hash table\n",
+ bond->dev->name);
+ continue;
+ }
+ /*update all clients using this src_ip, that are not assigned
+ * to the team's address (curr_active_slave) and have a known
+ * unicast mac address.
+ */
+ if ((client_info->ip_src == src_ip) &&
+ compare_ether_addr_64bits(client_info->slave->dev->dev_addr,
+ bond->dev->dev_addr) &&
+ compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) {
+ client_info->ntt = 1;
+ bond_info->rx_ntt = 1;
+ }
+ }
+
+ _unlock_rx_hashtbl(bond);
+}
+
+/* Caller must hold both bond and ptr locks for read */
+static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct arp_pkt *arp = arp_pkt(skb);
+ struct slave *assigned_slave;
+ struct rlb_client_info *client_info;
+ u32 hash_index = 0;
+
+ _lock_rx_hashtbl(bond);
+
+ hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst));
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+
+ if (client_info->assigned) {
+ if ((client_info->ip_src == arp->ip_src) &&
+ (client_info->ip_dst == arp->ip_dst)) {
+ /* the entry is already assigned to this client */
+ if (compare_ether_addr_64bits(arp->mac_dst, mac_bcast)) {
+ /* update mac address from arp */
+ memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
+ }
+
+ assigned_slave = client_info->slave;
+ if (assigned_slave) {
+ _unlock_rx_hashtbl(bond);
+ return assigned_slave;
+ }
+ } else {
+ /* the entry is already assigned to some other client,
+ * move the old client to primary (curr_active_slave) so
+ * that the new client can be assigned to this entry.
+ */
+ if (bond->curr_active_slave &&
+ client_info->slave != bond->curr_active_slave) {
+ client_info->slave = bond->curr_active_slave;
+ rlb_update_client(client_info);
+ }
+ }
+ }
+ /* assign a new slave */
+ assigned_slave = rlb_next_rx_slave(bond);
+
+ if (assigned_slave) {
+ client_info->ip_src = arp->ip_src;
+ client_info->ip_dst = arp->ip_dst;
+ /* arp->mac_dst is broadcast for arp reqeusts.
+ * will be updated with clients actual unicast mac address
+ * upon receiving an arp reply.
+ */
+ memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
+ client_info->slave = assigned_slave;
+
+ if (compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) {
+ client_info->ntt = 1;
+ bond->alb_info.rx_ntt = 1;
+ } else {
+ client_info->ntt = 0;
+ }
+
+ if (bond_vlan_used(bond)) {
+ if (!vlan_get_tag(skb, &client_info->vlan_id))
+ client_info->tag = 1;
+ }
+
+ if (!client_info->assigned) {
+ u32 prev_tbl_head = bond_info->rx_hashtbl_head;
+ bond_info->rx_hashtbl_head = hash_index;
+ client_info->next = prev_tbl_head;
+ if (prev_tbl_head != RLB_NULL_INDEX) {
+ bond_info->rx_hashtbl[prev_tbl_head].prev =
+ hash_index;
+ }
+ client_info->assigned = 1;
+ }
+ }
+
+ _unlock_rx_hashtbl(bond);
+
+ return assigned_slave;
+}
+
+/* chooses (and returns) transmit channel for arp reply
+ * does not choose channel for other arp types since they are
+ * sent on the curr_active_slave
+ */
+static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
+{
+ struct arp_pkt *arp = arp_pkt(skb);
+ struct slave *tx_slave = NULL;
+
+ /* Don't modify or load balance ARPs that do not originate locally
+ * (e.g.,arrive via a bridge).
+ */
+ if (!bond_slave_has_mac(bond, arp->mac_src))
+ return NULL;
+
+ if (arp->op_code == htons(ARPOP_REPLY)) {
+ /* the arp must be sent on the selected
+ * rx channel
+ */
+ tx_slave = rlb_choose_channel(skb, bond);
+ if (tx_slave) {
+ memcpy(arp->mac_src,tx_slave->dev->dev_addr, ETH_ALEN);
+ }
+ pr_debug("Server sent ARP Reply packet\n");
+ } else if (arp->op_code == htons(ARPOP_REQUEST)) {
+ /* Create an entry in the rx_hashtbl for this client as a
+ * place holder.
+ * When the arp reply is received the entry will be updated
+ * with the correct unicast address of the client.
+ */
+ rlb_choose_channel(skb, bond);
+
+ /* The ARP reply packets must be delayed so that
+ * they can cancel out the influence of the ARP request.
+ */
+ bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY;
+
+ /* arp requests are broadcast and are sent on the primary
+ * the arp request will collapse all clients on the subnet to
+ * the primary slave. We must register these clients to be
+ * updated with their assigned mac.
+ */
+ rlb_req_update_subnet_clients(bond, arp->ip_src);
+ pr_debug("Server sent ARP Request packet\n");
+ }
+
+ return tx_slave;
+}
+
+/* Caller must hold bond lock for read */
+static void rlb_rebalance(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *assigned_slave;
+ struct rlb_client_info *client_info;
+ int ntt;
+ u32 hash_index;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ ntt = 0;
+ hash_index = bond_info->rx_hashtbl_head;
+ for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ assigned_slave = rlb_next_rx_slave(bond);
+ if (assigned_slave && (client_info->slave != assigned_slave)) {
+ client_info->slave = assigned_slave;
+ client_info->ntt = 1;
+ ntt = 1;
+ }
+ }
+
+ /* update the team's flag only after the whole iteration */
+ if (ntt) {
+ bond_info->rx_ntt = 1;
+ }
+ _unlock_rx_hashtbl_bh(bond);
+}
+
+/* Caller must hold rx_hashtbl lock */
+static void rlb_init_table_entry(struct rlb_client_info *entry)
+{
+ memset(entry, 0, sizeof(struct rlb_client_info));
+ entry->next = RLB_NULL_INDEX;
+ entry->prev = RLB_NULL_INDEX;
+}
+
+static int rlb_initialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *new_hashtbl;
+ int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info);
+ int i;
+
+ new_hashtbl = kmalloc(size, GFP_KERNEL);
+ if (!new_hashtbl)
+ return -1;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ bond_info->rx_hashtbl = new_hashtbl;
+
+ bond_info->rx_hashtbl_head = RLB_NULL_INDEX;
+
+ for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) {
+ rlb_init_table_entry(bond_info->rx_hashtbl + i);
+ }
+
+ _unlock_rx_hashtbl_bh(bond);
+
+ /* register to receive ARPs */
+ bond->recv_probe = rlb_arp_recv;
+
+ return 0;
+}
+
+static void rlb_deinitialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ _lock_rx_hashtbl_bh(bond);
+
+ kfree(bond_info->rx_hashtbl);
+ bond_info->rx_hashtbl = NULL;
+ bond_info->rx_hashtbl_head = RLB_NULL_INDEX;
+
+ _unlock_rx_hashtbl_bh(bond);
+}
+
+static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ u32 curr_index;
+
+ _lock_rx_hashtbl_bh(bond);
+
+ curr_index = bond_info->rx_hashtbl_head;
+ while (curr_index != RLB_NULL_INDEX) {
+ struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
+ u32 next_index = bond_info->rx_hashtbl[curr_index].next;
+ u32 prev_index = bond_info->rx_hashtbl[curr_index].prev;
+
+ if (curr->tag && (curr->vlan_id == vlan_id)) {
+ if (curr_index == bond_info->rx_hashtbl_head) {
+ bond_info->rx_hashtbl_head = next_index;
+ }
+ if (prev_index != RLB_NULL_INDEX) {
+ bond_info->rx_hashtbl[prev_index].next = next_index;
+ }
+ if (next_index != RLB_NULL_INDEX) {
+ bond_info->rx_hashtbl[next_index].prev = prev_index;
+ }
+
+ rlb_init_table_entry(curr);
+ }
+
+ curr_index = next_index;
+ }
+
+ _unlock_rx_hashtbl_bh(bond);
+}
+
+/*********************** tlb/rlb shared functions *********************/
+
+static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[])
+{
+ struct bonding *bond = bond_get_bond_by_slave(slave);
+ struct learning_pkt pkt;
+ int size = sizeof(struct learning_pkt);
+ int i;
+
+ memset(&pkt, 0, size);
+ memcpy(pkt.mac_dst, mac_addr, ETH_ALEN);
+ memcpy(pkt.mac_src, mac_addr, ETH_ALEN);
+ pkt.type = cpu_to_be16(ETH_P_LOOP);
+
+ for (i = 0; i < MAX_LP_BURST; i++) {
+ struct sk_buff *skb;
+ char *data;
+
+ skb = dev_alloc_skb(size);
+ if (!skb) {
+ return;
+ }
+
+ data = skb_put(skb, size);
+ memcpy(data, &pkt, size);
+
+ skb_reset_mac_header(skb);
+ skb->network_header = skb->mac_header + ETH_HLEN;
+ skb->protocol = pkt.type;
+ skb->priority = TC_PRIO_CONTROL;
+ skb->dev = slave->dev;
+
+ if (bond_vlan_used(bond)) {
+ struct vlan_entry *vlan;
+
+ vlan = bond_next_vlan(bond,
+ bond->alb_info.current_alb_vlan);
+
+ bond->alb_info.current_alb_vlan = vlan;
+ if (!vlan) {
+ kfree_skb(skb);
+ continue;
+ }
+
+ skb = vlan_put_tag(skb, vlan->vlan_id);
+ if (!skb) {
+ pr_err("%s: Error: failed to insert VLAN tag\n",
+ bond->dev->name);
+ continue;
+ }
+ }
+
+ dev_queue_xmit(skb);
+ }
+}
+
+static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[])
+{
+ struct net_device *dev = slave->dev;
+ struct sockaddr s_addr;
+
+ if (slave->bond->params.mode == BOND_MODE_TLB) {
+ memcpy(dev->dev_addr, addr, dev->addr_len);
+ return 0;
+ }
+
+ /* for rlb each slave must have a unique hw mac addresses so that */
+ /* each slave will receive packets destined to a different mac */
+ memcpy(s_addr.sa_data, addr, dev->addr_len);
+ s_addr.sa_family = dev->type;
+ if (dev_set_mac_address(dev, &s_addr)) {
+ pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n"
+ "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n",
+ dev->master->name, dev->name);
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+
+/*
+ * Swap MAC addresses between two slaves.
+ *
+ * Called with RTNL held, and no other locks.
+ *
+ */
+
+static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2)
+{
+ u8 tmp_mac_addr[ETH_ALEN];
+
+ memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN);
+ alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr);
+ alb_set_slave_mac_addr(slave2, tmp_mac_addr);
+
+}
+
+/*
+ * Send learning packets after MAC address swap.
+ *
+ * Called with RTNL and no other locks
+ */
+static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1,
+ struct slave *slave2)
+{
+ int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2));
+ struct slave *disabled_slave = NULL;
+
+ ASSERT_RTNL();
+
+ /* fasten the change in the switch */
+ if (SLAVE_IS_OK(slave1)) {
+ alb_send_learning_packets(slave1, slave1->dev->dev_addr);
+ if (bond->alb_info.rlb_enabled) {
+ /* inform the clients that the mac address
+ * has changed
+ */
+ rlb_req_update_slave_clients(bond, slave1);
+ }
+ } else {
+ disabled_slave = slave1;
+ }
+
+ if (SLAVE_IS_OK(slave2)) {
+ alb_send_learning_packets(slave2, slave2->dev->dev_addr);
+ if (bond->alb_info.rlb_enabled) {
+ /* inform the clients that the mac address
+ * has changed
+ */
+ rlb_req_update_slave_clients(bond, slave2);
+ }
+ } else {
+ disabled_slave = slave2;
+ }
+
+ if (bond->alb_info.rlb_enabled && slaves_state_differ) {
+ /* A disabled slave was assigned an active mac addr */
+ rlb_teach_disabled_mac_on_primary(bond,
+ disabled_slave->dev->dev_addr);
+ }
+}
+
+/**
+ * alb_change_hw_addr_on_detach
+ * @bond: bonding we're working on
+ * @slave: the slave that was just detached
+ *
+ * We assume that @slave was already detached from the slave list.
+ *
+ * If @slave's permanent hw address is different both from its current
+ * address and from @bond's address, then somewhere in the bond there's
+ * a slave that has @slave's permanet address as its current address.
+ * We'll make sure that that slave no longer uses @slave's permanent address.
+ *
+ * Caller must hold RTNL and no other locks
+ */
+static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave)
+{
+ int perm_curr_diff;
+ int perm_bond_diff;
+
+ perm_curr_diff = compare_ether_addr_64bits(slave->perm_hwaddr,
+ slave->dev->dev_addr);
+ perm_bond_diff = compare_ether_addr_64bits(slave->perm_hwaddr,
+ bond->dev->dev_addr);
+
+ if (perm_curr_diff && perm_bond_diff) {
+ struct slave *tmp_slave;
+ int i, found = 0;
+
+ bond_for_each_slave(bond, tmp_slave, i) {
+ if (!compare_ether_addr_64bits(slave->perm_hwaddr,
+ tmp_slave->dev->dev_addr)) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (found) {
+ /* locking: needs RTNL and nothing else */
+ alb_swap_mac_addr(bond, slave, tmp_slave);
+ alb_fasten_mac_swap(bond, slave, tmp_slave);
+ }
+ }
+}
+
+/**
+ * alb_handle_addr_collision_on_attach
+ * @bond: bonding we're working on
+ * @slave: the slave that was just attached
+ *
+ * checks uniqueness of slave's mac address and handles the case the
+ * new slave uses the bonds mac address.
+ *
+ * If the permanent hw address of @slave is @bond's hw address, we need to
+ * find a different hw address to give @slave, that isn't in use by any other
+ * slave in the bond. This address must be, of course, one of the permanent
+ * addresses of the other slaves.
+ *
+ * We go over the slave list, and for each slave there we compare its
+ * permanent hw address with the current address of all the other slaves.
+ * If no match was found, then we've found a slave with a permanent address
+ * that isn't used by any other slave in the bond, so we can assign it to
+ * @slave.
+ *
+ * assumption: this function is called before @slave is attached to the
+ * bond slave list.
+ *
+ * caller must hold the bond lock for write since the mac addresses are compared
+ * and may be swapped.
+ */
+static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave)
+{
+ struct slave *tmp_slave1, *tmp_slave2, *free_mac_slave;
+ struct slave *has_bond_addr = bond->curr_active_slave;
+ int i, j, found = 0;
+
+ if (bond->slave_cnt == 0) {
+ /* this is the first slave */
+ return 0;
+ }
+
+ /* if slave's mac address differs from bond's mac address
+ * check uniqueness of slave's mac address against the other
+ * slaves in the bond.
+ */
+ if (compare_ether_addr_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
+ bond_for_each_slave(bond, tmp_slave1, i) {
+ if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr,
+ slave->dev->dev_addr)) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found)
+ return 0;
+
+ /* Try setting slave mac to bond address and fall-through
+ to code handling that situation below... */
+ alb_set_slave_mac_addr(slave, bond->dev->dev_addr);
+ }
+
+ /* The slave's address is equal to the address of the bond.
+ * Search for a spare address in the bond for this slave.
+ */
+ free_mac_slave = NULL;
+
+ bond_for_each_slave(bond, tmp_slave1, i) {
+ found = 0;
+ bond_for_each_slave(bond, tmp_slave2, j) {
+ if (!compare_ether_addr_64bits(tmp_slave1->perm_hwaddr,
+ tmp_slave2->dev->dev_addr)) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ /* no slave has tmp_slave1's perm addr
+ * as its curr addr
+ */
+ free_mac_slave = tmp_slave1;
+ break;
+ }
+
+ if (!has_bond_addr) {
+ if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr,
+ bond->dev->dev_addr)) {
+
+ has_bond_addr = tmp_slave1;
+ }
+ }
+ }
+
+ if (free_mac_slave) {
+ alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr);
+
+ pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
+ bond->dev->name, slave->dev->name,
+ free_mac_slave->dev->name);
+
+ } else if (has_bond_addr) {
+ pr_err("%s: Error: the hw address of slave %s is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)\n",
+ bond->dev->name, slave->dev->name);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+/**
+ * alb_set_mac_address
+ * @bond:
+ * @addr:
+ *
+ * In TLB mode all slaves are configured to the bond's hw address, but set
+ * their dev_addr field to different addresses (based on their permanent hw
+ * addresses).
+ *
+ * For each slave, this function sets the interface to the new address and then
+ * changes its dev_addr field to its previous value.
+ *
+ * Unwinding assumes bond's mac address has not yet changed.
+ */
+static int alb_set_mac_address(struct bonding *bond, void *addr)
+{
+ struct sockaddr sa;
+ struct slave *slave, *stop_at;
+ char tmp_addr[ETH_ALEN];
+ int res;
+ int i;
+
+ if (bond->alb_info.rlb_enabled) {
+ return 0;
+ }
+
+ bond_for_each_slave(bond, slave, i) {
+ /* save net_device's current hw address */
+ memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN);
+
+ res = dev_set_mac_address(slave->dev, addr);
+
+ /* restore net_device's hw address */
+ memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN);
+
+ if (res)
+ goto unwind;
+ }
+
+ return 0;
+
+unwind:
+ memcpy(sa.sa_data, bond->dev->dev_addr, bond->dev->addr_len);
+ sa.sa_family = bond->dev->type;
+
+ /* unwind from head to the slave that failed */
+ stop_at = slave;
+ bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN);
+ dev_set_mac_address(slave->dev, &sa);
+ memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN);
+ }
+
+ return res;
+}
+
+/************************ exported alb funcions ************************/
+
+int bond_alb_initialize(struct bonding *bond, int rlb_enabled)
+{
+ int res;
+
+ res = tlb_initialize(bond);
+ if (res) {
+ return res;
+ }
+
+ if (rlb_enabled) {
+ bond->alb_info.rlb_enabled = 1;
+ /* initialize rlb */
+ res = rlb_initialize(bond);
+ if (res) {
+ tlb_deinitialize(bond);
+ return res;
+ }
+ } else {
+ bond->alb_info.rlb_enabled = 0;
+ }
+
+ return 0;
+}
+
+void bond_alb_deinitialize(struct bonding *bond)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ tlb_deinitialize(bond);
+
+ if (bond_info->rlb_enabled) {
+ rlb_deinitialize(bond);
+ }
+}
+
+int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct ethhdr *eth_data;
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *tx_slave = NULL;
+ static const __be32 ip_bcast = htonl(0xffffffff);
+ int hash_size = 0;
+ int do_tx_balance = 1;
+ u32 hash_index = 0;
+ const u8 *hash_start = NULL;
+ int res = 1;
+ struct ipv6hdr *ip6hdr;
+
+ skb_reset_mac_header(skb);
+ eth_data = eth_hdr(skb);
+
+ /* make sure that the curr_active_slave do not change during tx
+ */
+ read_lock(&bond->curr_slave_lock);
+
+ switch (ntohs(skb->protocol)) {
+ case ETH_P_IP: {
+ const struct iphdr *iph = ip_hdr(skb);
+
+ if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast) ||
+ (iph->daddr == ip_bcast) ||
+ (iph->protocol == IPPROTO_IGMP)) {
+ do_tx_balance = 0;
+ break;
+ }
+ hash_start = (char *)&(iph->daddr);
+ hash_size = sizeof(iph->daddr);
+ }
+ break;
+ case ETH_P_IPV6:
+ /* IPv6 doesn't really use broadcast mac address, but leave
+ * that here just in case.
+ */
+ if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast)) {
+ do_tx_balance = 0;
+ break;
+ }
+
+ /* IPv6 uses all-nodes multicast as an equivalent to
+ * broadcasts in IPv4.
+ */
+ if (!compare_ether_addr_64bits(eth_data->h_dest, mac_v6_allmcast)) {
+ do_tx_balance = 0;
+ break;
+ }
+
+ /* Additianally, DAD probes should not be tx-balanced as that
+ * will lead to false positives for duplicate addresses and
+ * prevent address configuration from working.
+ */
+ ip6hdr = ipv6_hdr(skb);
+ if (ipv6_addr_any(&ip6hdr->saddr)) {
+ do_tx_balance = 0;
+ break;
+ }
+
+ hash_start = (char *)&(ipv6_hdr(skb)->daddr);
+ hash_size = sizeof(ipv6_hdr(skb)->daddr);
+ break;
+ case ETH_P_IPX:
+ if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) {
+ /* something is wrong with this packet */
+ do_tx_balance = 0;
+ break;
+ }
+
+ if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) {
+ /* The only protocol worth balancing in
+ * this family since it has an "ARP" like
+ * mechanism
+ */
+ do_tx_balance = 0;
+ break;
+ }
+
+ hash_start = (char*)eth_data->h_dest;
+ hash_size = ETH_ALEN;
+ break;
+ case ETH_P_ARP:
+ do_tx_balance = 0;
+ if (bond_info->rlb_enabled) {
+ tx_slave = rlb_arp_xmit(skb, bond);
+ }
+ break;
+ default:
+ do_tx_balance = 0;
+ break;
+ }
+
+ if (do_tx_balance) {
+ hash_index = _simple_hash(hash_start, hash_size);
+ tx_slave = tlb_choose_channel(bond, hash_index, skb->len);
+ }
+
+ if (!tx_slave) {
+ /* unbalanced or unassigned, send through primary */
+ tx_slave = bond->curr_active_slave;
+ bond_info->unbalanced_load += skb->len;
+ }
+
+ if (tx_slave && SLAVE_IS_OK(tx_slave)) {
+ if (tx_slave != bond->curr_active_slave) {
+ memcpy(eth_data->h_source,
+ tx_slave->dev->dev_addr,
+ ETH_ALEN);
+ }
+
+ res = bond_dev_queue_xmit(bond, skb, tx_slave->dev);
+ } else {
+ if (tx_slave) {
+ _lock_tx_hashtbl(bond);
+ __tlb_clear_slave(bond, tx_slave, 0);
+ _unlock_tx_hashtbl(bond);
+ }
+ }
+
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+ read_unlock(&bond->curr_slave_lock);
+
+ return NETDEV_TX_OK;
+}
+
+void bond_alb_monitor(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ alb_work.work);
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *slave;
+ int i;
+
+ read_lock(&bond->lock);
+
+ if (bond->slave_cnt == 0) {
+ bond_info->tx_rebalance_counter = 0;
+ bond_info->lp_counter = 0;
+ goto re_arm;
+ }
+
+ bond_info->tx_rebalance_counter++;
+ bond_info->lp_counter++;
+
+ /* send learning packets */
+ if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) {
+ /* change of curr_active_slave involves swapping of mac addresses.
+ * in order to avoid this swapping from happening while
+ * sending the learning packets, the curr_slave_lock must be held for
+ * read.
+ */
+ read_lock(&bond->curr_slave_lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ alb_send_learning_packets(slave, slave->dev->dev_addr);
+ }
+
+ read_unlock(&bond->curr_slave_lock);
+
+ bond_info->lp_counter = 0;
+ }
+
+ /* rebalance tx traffic */
+ if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) {
+
+ read_lock(&bond->curr_slave_lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ tlb_clear_slave(bond, slave, 1);
+ if (slave == bond->curr_active_slave) {
+ SLAVE_TLB_INFO(slave).load =
+ bond_info->unbalanced_load /
+ BOND_TLB_REBALANCE_INTERVAL;
+ bond_info->unbalanced_load = 0;
+ }
+ }
+
+ read_unlock(&bond->curr_slave_lock);
+
+ bond_info->tx_rebalance_counter = 0;
+ }
+
+ /* handle rlb stuff */
+ if (bond_info->rlb_enabled) {
+ if (bond_info->primary_is_promisc &&
+ (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
+
+ /*
+ * dev_set_promiscuity requires rtnl and
+ * nothing else. Avoid race with bond_close.
+ */
+ read_unlock(&bond->lock);
+ if (!rtnl_trylock()) {
+ read_lock(&bond->lock);
+ goto re_arm;
+ }
+
+ bond_info->rlb_promisc_timeout_counter = 0;
+
+ /* If the primary was set to promiscuous mode
+ * because a slave was disabled then
+ * it can now leave promiscuous mode.
+ */
+ dev_set_promiscuity(bond->curr_active_slave->dev, -1);
+ bond_info->primary_is_promisc = 0;
+
+ rtnl_unlock();
+ read_lock(&bond->lock);
+ }
+
+ if (bond_info->rlb_rebalance) {
+ bond_info->rlb_rebalance = 0;
+ rlb_rebalance(bond);
+ }
+
+ /* check if clients need updating */
+ if (bond_info->rx_ntt) {
+ if (bond_info->rlb_update_delay_counter) {
+ --bond_info->rlb_update_delay_counter;
+ } else {
+ rlb_update_rx_clients(bond);
+ if (bond_info->rlb_update_retry_counter) {
+ --bond_info->rlb_update_retry_counter;
+ } else {
+ bond_info->rx_ntt = 0;
+ }
+ }
+ }
+ }
+
+re_arm:
+ queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
+
+ read_unlock(&bond->lock);
+}
+
+/* assumption: called before the slave is attached to the bond
+ * and not locked by the bond lock
+ */
+int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
+{
+ int res;
+
+ res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr);
+ if (res) {
+ return res;
+ }
+
+ /* caller must hold the bond lock for write since the mac addresses
+ * are compared and may be swapped.
+ */
+ read_lock(&bond->lock);
+
+ res = alb_handle_addr_collision_on_attach(bond, slave);
+
+ read_unlock(&bond->lock);
+
+ if (res) {
+ return res;
+ }
+
+ tlb_init_slave(slave);
+
+ /* order a rebalance ASAP */
+ bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
+
+ if (bond->alb_info.rlb_enabled) {
+ bond->alb_info.rlb_rebalance = 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Remove slave from tlb and rlb hash tables, and fix up MAC addresses
+ * if necessary.
+ *
+ * Caller must hold RTNL and no other locks
+ */
+void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
+{
+ if (bond->slave_cnt > 1) {
+ alb_change_hw_addr_on_detach(bond, slave);
+ }
+
+ tlb_clear_slave(bond, slave, 0);
+
+ if (bond->alb_info.rlb_enabled) {
+ bond->alb_info.next_rx_slave = NULL;
+ rlb_clear_slave(bond, slave);
+ }
+}
+
+/* Caller must hold bond lock for read */
+void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link)
+{
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ if (link == BOND_LINK_DOWN) {
+ tlb_clear_slave(bond, slave, 0);
+ if (bond->alb_info.rlb_enabled) {
+ rlb_clear_slave(bond, slave);
+ }
+ } else if (link == BOND_LINK_UP) {
+ /* order a rebalance ASAP */
+ bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
+ if (bond->alb_info.rlb_enabled) {
+ bond->alb_info.rlb_rebalance = 1;
+ /* If the updelay module parameter is smaller than the
+ * forwarding delay of the switch the rebalance will
+ * not work because the rebalance arp replies will
+ * not be forwarded to the clients..
+ */
+ }
+ }
+}
+
+/**
+ * bond_alb_handle_active_change - assign new curr_active_slave
+ * @bond: our bonding struct
+ * @new_slave: new slave to assign
+ *
+ * Set the bond->curr_active_slave to @new_slave and handle
+ * mac address swapping and promiscuity changes as needed.
+ *
+ * If new_slave is NULL, caller must hold curr_slave_lock or
+ * bond->lock for write.
+ *
+ * If new_slave is not NULL, caller must hold RTNL, bond->lock for
+ * read and curr_slave_lock for write. Processing here may sleep, so
+ * no other locks may be held.
+ */
+void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave)
+ __releases(&bond->curr_slave_lock)
+ __releases(&bond->lock)
+ __acquires(&bond->lock)
+ __acquires(&bond->curr_slave_lock)
+{
+ struct slave *swap_slave;
+ int i;
+
+ if (bond->curr_active_slave == new_slave) {
+ return;
+ }
+
+ if (bond->curr_active_slave && bond->alb_info.primary_is_promisc) {
+ dev_set_promiscuity(bond->curr_active_slave->dev, -1);
+ bond->alb_info.primary_is_promisc = 0;
+ bond->alb_info.rlb_promisc_timeout_counter = 0;
+ }
+
+ swap_slave = bond->curr_active_slave;
+ bond->curr_active_slave = new_slave;
+
+ if (!new_slave || (bond->slave_cnt == 0)) {
+ return;
+ }
+
+ /* set the new curr_active_slave to the bonds mac address
+ * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave
+ */
+ if (!swap_slave) {
+ struct slave *tmp_slave;
+ /* find slave that is holding the bond's mac address */
+ bond_for_each_slave(bond, tmp_slave, i) {
+ if (!compare_ether_addr_64bits(tmp_slave->dev->dev_addr,
+ bond->dev->dev_addr)) {
+ swap_slave = tmp_slave;
+ break;
+ }
+ }
+ }
+
+ /*
+ * Arrange for swap_slave and new_slave to temporarily be
+ * ignored so we can mess with their MAC addresses without
+ * fear of interference from transmit activity.
+ */
+ if (swap_slave) {
+ tlb_clear_slave(bond, swap_slave, 1);
+ }
+ tlb_clear_slave(bond, new_slave, 1);
+
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+
+ ASSERT_RTNL();
+
+ /* curr_active_slave must be set before calling alb_swap_mac_addr */
+ if (swap_slave) {
+ /* swap mac address */
+ alb_swap_mac_addr(bond, swap_slave, new_slave);
+ } else {
+ /* set the new_slave to the bond mac address */
+ alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr);
+ }
+
+ if (swap_slave) {
+ alb_fasten_mac_swap(bond, swap_slave, new_slave);
+ read_lock(&bond->lock);
+ } else {
+ read_lock(&bond->lock);
+ alb_send_learning_packets(new_slave, bond->dev->dev_addr);
+ }
+
+ write_lock_bh(&bond->curr_slave_lock);
+}
+
+/*
+ * Called with RTNL
+ */
+int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
+ __acquires(&bond->lock)
+ __releases(&bond->lock)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct sockaddr *sa = addr;
+ struct slave *slave, *swap_slave;
+ int res;
+ int i;
+
+ if (!is_valid_ether_addr(sa->sa_data)) {
+ return -EADDRNOTAVAIL;
+ }
+
+ res = alb_set_mac_address(bond, addr);
+ if (res) {
+ return res;
+ }
+
+ memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
+
+ /* If there is no curr_active_slave there is nothing else to do.
+ * Otherwise we'll need to pass the new address to it and handle
+ * duplications.
+ */
+ if (!bond->curr_active_slave) {
+ return 0;
+ }
+
+ swap_slave = NULL;
+
+ bond_for_each_slave(bond, slave, i) {
+ if (!compare_ether_addr_64bits(slave->dev->dev_addr,
+ bond_dev->dev_addr)) {
+ swap_slave = slave;
+ break;
+ }
+ }
+
+ if (swap_slave) {
+ alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave);
+ alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave);
+ } else {
+ alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr);
+
+ read_lock(&bond->lock);
+ alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr);
+ if (bond->alb_info.rlb_enabled) {
+ /* inform clients mac address has changed */
+ rlb_req_update_slave_clients(bond, bond->curr_active_slave);
+ }
+ read_unlock(&bond->lock);
+ }
+
+ return 0;
+}
+
+void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ if (bond->alb_info.current_alb_vlan &&
+ (bond->alb_info.current_alb_vlan->vlan_id == vlan_id)) {
+ bond->alb_info.current_alb_vlan = NULL;
+ }
+
+ if (bond->alb_info.rlb_enabled) {
+ rlb_clear_vlan(bond, vlan_id);
+ }
+}
+
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_alb.h b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_alb.h
new file mode 100644
index 0000000..90f140a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_alb.h
@@ -0,0 +1,167 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef __BOND_ALB_H__
+#define __BOND_ALB_H__
+
+#include <linux/if_ether.h>
+
+struct bonding;
+struct slave;
+
+#define BOND_ALB_INFO(bond) ((bond)->alb_info)
+#define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
+
+#define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */
+#define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing.
+ * Used for division - never set
+ * to zero !!!
+ */
+#define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of
+ * learning packets to the switch
+ */
+
+#define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
+ * ALB_TIMER_TICKS_PER_SEC)
+
+#define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \
+ * ALB_TIMER_TICKS_PER_SEC)
+
+#define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
+ * Note that this value MUST NOT be smaller
+ * because the key hash table is BYTE wide !
+ */
+
+
+#define TLB_NULL_INDEX 0xffffffff
+#define MAX_LP_BURST 3
+
+/* rlb defs */
+#define RLB_HASH_TABLE_SIZE 256
+#define RLB_NULL_INDEX 0xffffffff
+#define RLB_UPDATE_DELAY (2*ALB_TIMER_TICKS_PER_SEC) /* 2 seconds */
+#define RLB_ARP_BURST_SIZE 2
+#define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb
+ * rebalance interval (5 min).
+ */
+/* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
+ * promiscuous after failover
+ */
+#define RLB_PROMISC_TIMEOUT (10*ALB_TIMER_TICKS_PER_SEC)
+
+
+struct tlb_client_info {
+ struct slave *tx_slave; /* A pointer to slave used for transmiting
+ * packets to a Client that the Hash function
+ * gave this entry index.
+ */
+ u32 tx_bytes; /* Each Client accumulates the BytesTx that
+ * were transmitted to it, and after each
+ * CallBack the LoadHistory is divided
+ * by the balance interval
+ */
+ u32 load_history; /* This field contains the amount of Bytes
+ * that were transmitted to this client by
+ * the server on the previous balance
+ * interval in Bps.
+ */
+ u32 next; /* The next Hash table entry index, assigned
+ * to use the same adapter for transmit.
+ */
+ u32 prev; /* The previous Hash table entry index,
+ * assigned to use the same
+ */
+};
+
+/* -------------------------------------------------------------------------
+ * struct rlb_client_info contains all info related to a specific rx client
+ * connection. This is the Clients Hash Table entry struct
+ * -------------------------------------------------------------------------
+ */
+struct rlb_client_info {
+ __be32 ip_src; /* the server IP address */
+ __be32 ip_dst; /* the client IP address */
+ u8 mac_dst[ETH_ALEN]; /* the client MAC address */
+ u32 next; /* The next Hash table entry index */
+ u32 prev; /* The previous Hash table entry index */
+ u8 assigned; /* checking whether this entry is assigned */
+ u8 ntt; /* flag - need to transmit client info */
+ struct slave *slave; /* the slave assigned to this client */
+ u8 tag; /* flag - need to tag skb */
+ unsigned short vlan_id; /* VLAN tag associated with IP address */
+};
+
+struct tlb_slave_info {
+ u32 head; /* Index to the head of the bi-directional clients
+ * hash table entries list. The entries in the list
+ * are the entries that were assigned to use this
+ * slave for transmit.
+ */
+ u32 load; /* Each slave sums the loadHistory of all clients
+ * assigned to it
+ */
+};
+
+struct alb_bond_info {
+ struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */
+ spinlock_t tx_hashtbl_lock;
+ u32 unbalanced_load;
+ int tx_rebalance_counter;
+ int lp_counter;
+ /* -------- rlb parameters -------- */
+ int rlb_enabled;
+ struct rlb_client_info *rx_hashtbl; /* Receive hash table */
+ spinlock_t rx_hashtbl_lock;
+ u32 rx_hashtbl_head;
+ u8 rx_ntt; /* flag - need to transmit
+ * to all rx clients
+ */
+ struct slave *next_rx_slave;/* next slave to be assigned
+ * to a new rx client for
+ */
+ u8 primary_is_promisc; /* boolean */
+ u32 rlb_promisc_timeout_counter;/* counts primary
+ * promiscuity time
+ */
+ u32 rlb_update_delay_counter;
+ u32 rlb_update_retry_counter;/* counter of retries
+ * of client update
+ */
+ u8 rlb_rebalance; /* flag - indicates that the
+ * rx traffic should be
+ * rebalanced
+ */
+ struct vlan_entry *current_alb_vlan;
+};
+
+int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
+void bond_alb_deinitialize(struct bonding *bond);
+int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
+void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
+void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
+void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
+int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
+void bond_alb_monitor(struct work_struct *);
+int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
+void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
+#endif /* __BOND_ALB_H__ */
+
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_debugfs.c b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_debugfs.c
new file mode 100644
index 0000000..2cf084e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,146 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include "bonding.h"
+#include "bond_alb.h"
+
+#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static struct dentry *bonding_debug_root;
+
+/*
+ * Show RLB hash table
+ */
+static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
+{
+ struct bonding *bond = m->private;
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct rlb_client_info *client_info;
+ u32 hash_index;
+
+ if (bond->params.mode != BOND_MODE_ALB)
+ return 0;
+
+ seq_printf(m, "SourceIP DestinationIP "
+ "Destination MAC DEV\n");
+
+ spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+
+ hash_index = bond_info->rx_hashtbl_head;
+ for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
+ client_info = &(bond_info->rx_hashtbl[hash_index]);
+ seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
+ &client_info->ip_src,
+ &client_info->ip_dst,
+ &client_info->mac_dst,
+ client_info->slave->dev->name);
+ }
+
+ spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
+
+ return 0;
+}
+
+static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
+}
+
+static const struct file_operations bond_debug_rlb_hash_fops = {
+ .owner = THIS_MODULE,
+ .open = bond_debug_rlb_hash_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+void bond_debug_register(struct bonding *bond)
+{
+ if (!bonding_debug_root)
+ return;
+
+ bond->debug_dir =
+ debugfs_create_dir(bond->dev->name, bonding_debug_root);
+
+ if (!bond->debug_dir) {
+ pr_warning("%s: Warning: failed to register to debugfs\n",
+ bond->dev->name);
+ return;
+ }
+
+ debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
+ bond, &bond_debug_rlb_hash_fops);
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+ if (!bonding_debug_root)
+ return;
+
+ debugfs_remove_recursive(bond->debug_dir);
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+ struct dentry *d;
+
+ if (!bonding_debug_root)
+ return;
+
+ d = debugfs_rename(bonding_debug_root, bond->debug_dir,
+ bonding_debug_root, bond->dev->name);
+ if (d) {
+ bond->debug_dir = d;
+ } else {
+ pr_warning("%s: Warning: failed to reregister, "
+ "so just unregister old one\n",
+ bond->dev->name);
+ bond_debug_unregister(bond);
+ }
+}
+
+void bond_create_debugfs(void)
+{
+ bonding_debug_root = debugfs_create_dir("bonding", NULL);
+
+ if (!bonding_debug_root) {
+ pr_warning("Warning: Cannot create bonding directory"
+ " in debugfs\n");
+ }
+}
+
+void bond_destroy_debugfs(void)
+{
+ debugfs_remove_recursive(bonding_debug_root);
+ bonding_debug_root = NULL;
+}
+
+
+#else /* !CONFIG_DEBUG_FS */
+
+void bond_debug_register(struct bonding *bond)
+{
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+}
+
+void bond_create_debugfs(void)
+{
+}
+
+void bond_destroy_debugfs(void)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_main.c b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_main.c
new file mode 100644
index 0000000..2402af3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_main.c
@@ -0,0 +1,4964 @@
+/*
+ * originally based on the dummy device.
+ *
+ * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
+ * Licensed under the GPL. Based on dummy.c, and eql.c devices.
+ *
+ * bonding.c: an Ethernet Bonding driver
+ *
+ * This is useful to talk to a Cisco EtherChannel compatible equipment:
+ * Cisco 5500
+ * Sun Trunking (Solaris)
+ * Alteon AceDirector Trunks
+ * Linux Bonding
+ * and probably many L2 switches ...
+ *
+ * How it works:
+ * ifconfig bond0 ipaddress netmask up
+ * will setup a network device, with an ip address. No mac address
+ * will be assigned at this time. The hw mac address will come from
+ * the first slave bonded to the channel. All slaves will then use
+ * this hw mac address.
+ *
+ * ifconfig bond0 down
+ * will release all slaves, marking them as down.
+ *
+ * ifenslave bond0 eth0
+ * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
+ * a: be used as initial mac address
+ * b: if a hw mac address already is there, eth0's hw mac address
+ * will then be set from bond0.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <net/ip.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/socket.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <asm/dma.h>
+#include <linux/uaccess.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/igmp.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/smp.h>
+#include <linux/if_ether.h>
+#include <net/arp.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/if_bonding.h>
+#include <linux/jiffies.h>
+#include <linux/preempt.h>
+#include <net/route.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/pkt_sched.h>
+#include "bonding.h"
+#include "bond_3ad.h"
+#include "bond_alb.h"
+
+/*---------------------------- Module parameters ----------------------------*/
+
+/* monitor all links that often (in milliseconds). <=0 disables monitoring */
+#define BOND_LINK_MON_INTERV 0
+#define BOND_LINK_ARP_INTERV 0
+
+static int max_bonds = BOND_DEFAULT_MAX_BONDS;
+static int tx_queues = BOND_DEFAULT_TX_QUEUES;
+static int num_peer_notif = 1;
+static int miimon = BOND_LINK_MON_INTERV;
+static int updelay;
+static int downdelay;
+static int use_carrier = 1;
+static char *mode;
+static char *primary;
+static char *primary_reselect;
+static char *lacp_rate;
+static int min_links;
+static char *ad_select;
+static char *xmit_hash_policy;
+static int arp_interval = BOND_LINK_ARP_INTERV;
+static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
+static char *arp_validate;
+static char *fail_over_mac;
+static int all_slaves_active = 0;
+static struct bond_params bonding_defaults;
+static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
+
+module_param(max_bonds, int, 0);
+MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
+module_param(tx_queues, int, 0);
+MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
+module_param_named(num_grat_arp, num_peer_notif, int, 0644);
+MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
+ "failover event (alias of num_unsol_na)");
+module_param_named(num_unsol_na, num_peer_notif, int, 0644);
+MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
+ "failover event (alias of num_grat_arp)");
+module_param(miimon, int, 0);
+MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
+module_param(updelay, int, 0);
+MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
+module_param(downdelay, int, 0);
+MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
+ "in milliseconds");
+module_param(use_carrier, int, 0);
+MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
+ "0 for off, 1 for on (default)");
+module_param(mode, charp, 0);
+MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
+ "1 for active-backup, 2 for balance-xor, "
+ "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
+ "6 for balance-alb");
+module_param(primary, charp, 0);
+MODULE_PARM_DESC(primary, "Primary network device to use");
+module_param(primary_reselect, charp, 0);
+MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
+ "once it comes up; "
+ "0 for always (default), "
+ "1 for only if speed of primary is "
+ "better, "
+ "2 for only on active slave "
+ "failure");
+module_param(lacp_rate, charp, 0);
+MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
+ "0 for slow, 1 for fast");
+module_param(ad_select, charp, 0);
+MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; "
+ "0 for stable (default), 1 for bandwidth, "
+ "2 for count");
+module_param(min_links, int, 0);
+MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
+
+module_param(xmit_hash_policy, charp, 0);
+MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; "
+ "0 for layer 2 (default), 1 for layer 3+4, "
+ "2 for layer 2+3");
+module_param(arp_interval, int, 0);
+MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
+module_param_array(arp_ip_target, charp, NULL, 0);
+MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
+module_param(arp_validate, charp, 0);
+MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
+ "0 for none (default), 1 for active, "
+ "2 for backup, 3 for all");
+module_param(fail_over_mac, charp, 0);
+MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
+ "the same MAC; 0 for none (default), "
+ "1 for active, 2 for follow");
+module_param(all_slaves_active, int, 0);
+MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
+ "by setting active flag for all slaves; "
+ "0 for never (default), 1 for always.");
+module_param(resend_igmp, int, 0);
+MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
+ "link failure");
+
+/*----------------------------- Global variables ----------------------------*/
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+atomic_t netpoll_block_tx = ATOMIC_INIT(0);
+#endif
+
+int bond_net_id __read_mostly;
+
+static __be32 arp_target[BOND_MAX_ARP_TARGETS];
+static int arp_ip_count;
+static int bond_mode = BOND_MODE_ROUNDROBIN;
+static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
+static int lacp_fast;
+
+const struct bond_parm_tbl bond_lacp_tbl[] = {
+{ "slow", AD_LACP_SLOW},
+{ "fast", AD_LACP_FAST},
+{ NULL, -1},
+};
+
+const struct bond_parm_tbl bond_mode_tbl[] = {
+{ "balance-rr", BOND_MODE_ROUNDROBIN},
+{ "active-backup", BOND_MODE_ACTIVEBACKUP},
+{ "balance-xor", BOND_MODE_XOR},
+{ "broadcast", BOND_MODE_BROADCAST},
+{ "802.3ad", BOND_MODE_8023AD},
+{ "balance-tlb", BOND_MODE_TLB},
+{ "balance-alb", BOND_MODE_ALB},
+{ NULL, -1},
+};
+
+const struct bond_parm_tbl xmit_hashtype_tbl[] = {
+{ "layer2", BOND_XMIT_POLICY_LAYER2},
+{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
+{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
+{ NULL, -1},
+};
+
+const struct bond_parm_tbl arp_validate_tbl[] = {
+{ "none", BOND_ARP_VALIDATE_NONE},
+{ "active", BOND_ARP_VALIDATE_ACTIVE},
+{ "backup", BOND_ARP_VALIDATE_BACKUP},
+{ "all", BOND_ARP_VALIDATE_ALL},
+{ NULL, -1},
+};
+
+const struct bond_parm_tbl fail_over_mac_tbl[] = {
+{ "none", BOND_FOM_NONE},
+{ "active", BOND_FOM_ACTIVE},
+{ "follow", BOND_FOM_FOLLOW},
+{ NULL, -1},
+};
+
+const struct bond_parm_tbl pri_reselect_tbl[] = {
+{ "always", BOND_PRI_RESELECT_ALWAYS},
+{ "better", BOND_PRI_RESELECT_BETTER},
+{ "failure", BOND_PRI_RESELECT_FAILURE},
+{ NULL, -1},
+};
+
+struct bond_parm_tbl ad_select_tbl[] = {
+{ "stable", BOND_AD_STABLE},
+{ "bandwidth", BOND_AD_BANDWIDTH},
+{ "count", BOND_AD_COUNT},
+{ NULL, -1},
+};
+
+/*-------------------------- Forward declarations ---------------------------*/
+
+static int bond_init(struct net_device *bond_dev);
+static void bond_uninit(struct net_device *bond_dev);
+
+/*---------------------------- General routines -----------------------------*/
+
+const char *bond_mode_name(int mode)
+{
+ static const char *names[] = {
+ [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
+ [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
+ [BOND_MODE_XOR] = "load balancing (xor)",
+ [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
+ [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
+ [BOND_MODE_TLB] = "transmit load balancing",
+ [BOND_MODE_ALB] = "adaptive load balancing",
+ };
+
+ if (mode < 0 || mode > BOND_MODE_ALB)
+ return "unknown";
+
+ return names[mode];
+}
+
+/*---------------------------------- VLAN -----------------------------------*/
+
+/**
+ * bond_add_vlan - add a new vlan id on bond
+ * @bond: bond that got the notification
+ * @vlan_id: the vlan id to add
+ *
+ * Returns -ENOMEM if allocation failed.
+ */
+static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ struct vlan_entry *vlan;
+
+ pr_debug("bond: %s, vlan id %d\n",
+ (bond ? bond->dev->name : "None"), vlan_id);
+
+ vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
+ if (!vlan)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&vlan->vlan_list);
+ vlan->vlan_id = vlan_id;
+
+ write_lock_bh(&bond->lock);
+
+ list_add_tail(&vlan->vlan_list, &bond->vlan_list);
+
+ write_unlock_bh(&bond->lock);
+
+ pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
+
+ return 0;
+}
+
+/**
+ * bond_del_vlan - delete a vlan id from bond
+ * @bond: bond that got the notification
+ * @vlan_id: the vlan id to delete
+ *
+ * returns -ENODEV if @vlan_id was not found in @bond.
+ */
+static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
+{
+ struct vlan_entry *vlan;
+ int res = -ENODEV;
+
+ pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
+
+ block_netpoll_tx();
+ write_lock_bh(&bond->lock);
+
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ if (vlan->vlan_id == vlan_id) {
+ list_del(&vlan->vlan_list);
+
+ if (bond_is_lb(bond))
+ bond_alb_clear_vlan(bond, vlan_id);
+
+ pr_debug("removed VLAN ID %d from bond %s\n",
+ vlan_id, bond->dev->name);
+
+ kfree(vlan);
+
+ res = 0;
+ goto out;
+ }
+ }
+
+ pr_debug("couldn't find VLAN ID %d in bond %s\n",
+ vlan_id, bond->dev->name);
+
+out:
+ write_unlock_bh(&bond->lock);
+ unblock_netpoll_tx();
+ return res;
+}
+
+/**
+ * bond_next_vlan - safely skip to the next item in the vlans list.
+ * @bond: the bond we're working on
+ * @curr: item we're advancing from
+ *
+ * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
+ * or @curr->next otherwise (even if it is @curr itself again).
+ *
+ * Caller must hold bond->lock
+ */
+struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
+{
+ struct vlan_entry *next, *last;
+
+ if (list_empty(&bond->vlan_list))
+ return NULL;
+
+ if (!curr) {
+ next = list_entry(bond->vlan_list.next,
+ struct vlan_entry, vlan_list);
+ } else {
+ last = list_entry(bond->vlan_list.prev,
+ struct vlan_entry, vlan_list);
+ if (last == curr) {
+ next = list_entry(bond->vlan_list.next,
+ struct vlan_entry, vlan_list);
+ } else {
+ next = list_entry(curr->vlan_list.next,
+ struct vlan_entry, vlan_list);
+ }
+ }
+
+ return next;
+}
+
+/**
+ * bond_dev_queue_xmit - Prepare skb for xmit.
+ *
+ * @bond: bond device that got this skb for tx.
+ * @skb: hw accel VLAN tagged skb to transmit
+ * @slave_dev: slave that is supposed to xmit this skbuff
+ */
+int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
+ struct net_device *slave_dev)
+{
+ skb->dev = slave_dev;
+
+ BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
+ sizeof(qdisc_skb_cb(skb)->bond_queue_mapping));
+ skb->queue_mapping = qdisc_skb_cb(skb)->bond_queue_mapping;
+
+ if (unlikely(netpoll_tx_running(slave_dev)))
+ bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
+ else
+ dev_queue_xmit(skb);
+
+ return 0;
+}
+
+/*
+ * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
+ * We don't protect the slave list iteration with a lock because:
+ * a. This operation is performed in IOCTL context,
+ * b. The operation is protected by the RTNL semaphore in the 8021q code,
+ * c. Holding a lock with BH disabled while directly calling a base driver
+ * entry point is generally a BAD idea.
+ *
+ * The design of synchronization/protection for this operation in the 8021q
+ * module is good for one or more VLAN devices over a single physical device
+ * and cannot be extended for a teaming solution like bonding, so there is a
+ * potential race condition here where a net device from the vlan group might
+ * be referenced (either by a base driver or the 8021q code) while it is being
+ * removed from the system. However, it turns out we're not making matters
+ * worse, and if it works for regular VLAN usage it will work here too.
+*/
+
+/**
+ * bond_vlan_rx_add_vid - Propagates adding an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being added
+ */
+static int bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *stop_at;
+ int i, res;
+
+ bond_for_each_slave(bond, slave, i) {
+ res = vlan_vid_add(slave->dev, vid);
+ if (res)
+ goto unwind;
+ }
+
+ res = bond_add_vlan(bond, vid);
+ if (res) {
+ pr_err("%s: Error: Failed to add vlan id %d\n",
+ bond_dev->name, vid);
+ return res;
+ }
+
+ return 0;
+
+unwind:
+ /* unwind from head to the slave that failed */
+ stop_at = slave;
+ bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at)
+ vlan_vid_del(slave->dev, vid);
+
+ return res;
+}
+
+/**
+ * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
+ * @bond_dev: bonding net device that got called
+ * @vid: vlan id being removed
+ */
+static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave;
+ int i, res;
+
+ bond_for_each_slave(bond, slave, i)
+ vlan_vid_del(slave->dev, vid);
+
+ res = bond_del_vlan(bond, vid);
+ if (res) {
+ pr_err("%s: Error: Failed to remove vlan id %d\n",
+ bond_dev->name, vid);
+ return res;
+ }
+
+ return 0;
+}
+
+static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
+{
+ struct vlan_entry *vlan;
+ int res;
+
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ res = vlan_vid_add(slave_dev, vlan->vlan_id);
+ if (res)
+ pr_warning("%s: Failed to add vlan id %d to device %s\n",
+ bond->dev->name, vlan->vlan_id,
+ slave_dev->name);
+ }
+}
+
+static void bond_del_vlans_from_slave(struct bonding *bond,
+ struct net_device *slave_dev)
+{
+ struct vlan_entry *vlan;
+
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ if (!vlan->vlan_id)
+ continue;
+ vlan_vid_del(slave_dev, vlan->vlan_id);
+ }
+}
+
+/*------------------------------- Link status -------------------------------*/
+
+/*
+ * Set the carrier state for the master according to the state of its
+ * slaves. If any slaves are up, the master is up. In 802.3ad mode,
+ * do special 802.3ad magic.
+ *
+ * Returns zero if carrier state does not change, nonzero if it does.
+ */
+static int bond_set_carrier(struct bonding *bond)
+{
+ struct slave *slave;
+ int i;
+
+ if (bond->slave_cnt == 0)
+ goto down;
+
+ if (bond->params.mode == BOND_MODE_8023AD)
+ return bond_3ad_set_carrier(bond);
+
+ bond_for_each_slave(bond, slave, i) {
+ if (slave->link == BOND_LINK_UP) {
+ if (!netif_carrier_ok(bond->dev)) {
+ netif_carrier_on(bond->dev);
+ return 1;
+ }
+ return 0;
+ }
+ }
+
+down:
+ if (netif_carrier_ok(bond->dev)) {
+ netif_carrier_off(bond->dev);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Get link speed and duplex from the slave's base driver
+ * using ethtool. If for some reason the call fails or the
+ * values are invalid, set speed and duplex to -1,
+ * and return error.
+ */
+static int bond_update_speed_duplex(struct slave *slave)
+{
+ struct net_device *slave_dev = slave->dev;
+ struct ethtool_cmd ecmd;
+ u32 slave_speed;
+ int res;
+
+ slave->speed = SPEED_UNKNOWN;
+ slave->duplex = DUPLEX_UNKNOWN;
+
+ res = __ethtool_get_settings(slave_dev, &ecmd);
+ if (res < 0)
+ return -1;
+
+ slave_speed = ethtool_cmd_speed(&ecmd);
+ if (slave_speed == 0 || slave_speed == ((__u32) -1))
+ return -1;
+
+ switch (ecmd.duplex) {
+ case DUPLEX_FULL:
+ case DUPLEX_HALF:
+ break;
+ default:
+ return -1;
+ }
+
+ slave->speed = slave_speed;
+ slave->duplex = ecmd.duplex;
+
+ return 0;
+}
+
+/*
+ * if <dev> supports MII link status reporting, check its link status.
+ *
+ * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
+ * depending upon the setting of the use_carrier parameter.
+ *
+ * Return either BMSR_LSTATUS, meaning that the link is up (or we
+ * can't tell and just pretend it is), or 0, meaning that the link is
+ * down.
+ *
+ * If reporting is non-zero, instead of faking link up, return -1 if
+ * both ETHTOOL and MII ioctls fail (meaning the device does not
+ * support them). If use_carrier is set, return whatever it says.
+ * It'd be nice if there was a good way to tell if a driver supports
+ * netif_carrier, but there really isn't.
+ */
+static int bond_check_dev_link(struct bonding *bond,
+ struct net_device *slave_dev, int reporting)
+{
+ const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
+ int (*ioctl)(struct net_device *, struct ifreq *, int);
+ struct ifreq ifr;
+ struct mii_ioctl_data *mii;
+
+ if (!reporting && !netif_running(slave_dev))
+ return 0;
+
+ if (bond->params.use_carrier)
+ return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
+
+ /* Try to get link status using Ethtool first. */
+ if (slave_dev->ethtool_ops) {
+ if (slave_dev->ethtool_ops->get_link) {
+ u32 link;
+
+ link = slave_dev->ethtool_ops->get_link(slave_dev);
+
+ return link ? BMSR_LSTATUS : 0;
+ }
+ }
+
+ /* Ethtool can't be used, fallback to MII ioctls. */
+ ioctl = slave_ops->ndo_do_ioctl;
+ if (ioctl) {
+ /* TODO: set pointer to correct ioctl on a per team member */
+ /* bases to make this more efficient. that is, once */
+ /* we determine the correct ioctl, we will always */
+ /* call it and not the others for that team */
+ /* member. */
+
+ /*
+ * We cannot assume that SIOCGMIIPHY will also read a
+ * register; not all network drivers (e.g., e100)
+ * support that.
+ */
+
+ /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
+ strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
+ mii = if_mii(&ifr);
+ if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
+ mii->reg_num = MII_BMSR;
+ if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
+ return mii->val_out & BMSR_LSTATUS;
+ }
+ }
+
+ /*
+ * If reporting, report that either there's no dev->do_ioctl,
+ * or both SIOCGMIIREG and get_link failed (meaning that we
+ * cannot report link status). If not reporting, pretend
+ * we're ok.
+ */
+ return reporting ? -1 : BMSR_LSTATUS;
+}
+
+/*----------------------------- Multicast list ------------------------------*/
+
+/*
+ * Push the promiscuity flag down to appropriate slaves
+ */
+static int bond_set_promiscuity(struct bonding *bond, int inc)
+{
+ int err = 0;
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave) {
+ err = dev_set_promiscuity(bond->curr_active_slave->dev,
+ inc);
+ }
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ err = dev_set_promiscuity(slave->dev, inc);
+ if (err)
+ return err;
+ }
+ }
+ return err;
+}
+
+/*
+ * Push the allmulti flag down to all slaves
+ */
+static int bond_set_allmulti(struct bonding *bond, int inc)
+{
+ int err = 0;
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave) {
+ err = dev_set_allmulti(bond->curr_active_slave->dev,
+ inc);
+ }
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ err = dev_set_allmulti(slave->dev, inc);
+ if (err)
+ return err;
+ }
+ }
+ return err;
+}
+
+/*
+ * Add a Multicast address to slaves
+ * according to mode
+ */
+static void bond_mc_add(struct bonding *bond, void *addr)
+{
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave)
+ dev_mc_add(bond->curr_active_slave->dev, addr);
+ } else {
+ struct slave *slave;
+ int i;
+
+ bond_for_each_slave(bond, slave, i)
+ dev_mc_add(slave->dev, addr);
+ }
+}
+
+/*
+ * Remove a multicast address from slave
+ * according to mode
+ */
+static void bond_mc_del(struct bonding *bond, void *addr)
+{
+ if (USES_PRIMARY(bond->params.mode)) {
+ /* write lock already acquired */
+ if (bond->curr_active_slave)
+ dev_mc_del(bond->curr_active_slave->dev, addr);
+ } else {
+ struct slave *slave;
+ int i;
+ bond_for_each_slave(bond, slave, i) {
+ dev_mc_del(slave->dev, addr);
+ }
+ }
+}
+
+
+static void __bond_resend_igmp_join_requests(struct net_device *dev)
+{
+ struct in_device *in_dev;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(dev);
+ if (in_dev)
+ ip_mc_rejoin_groups(in_dev);
+ rcu_read_unlock();
+}
+
+/*
+ * Retrieve the list of registered multicast addresses for the bonding
+ * device and retransmit an IGMP JOIN request to the current active
+ * slave.
+ */
+static void bond_resend_igmp_join_requests(struct bonding *bond)
+{
+ struct net_device *bond_dev, *vlan_dev, *master_dev;
+ struct vlan_entry *vlan;
+
+ read_lock(&bond->lock);
+
+ bond_dev = bond->dev;
+
+ /* rejoin all groups on bond device */
+ __bond_resend_igmp_join_requests(bond_dev);
+
+ /*
+ * if bond is enslaved to a bridge,
+ * then rejoin all groups on its master
+ */
+ master_dev = bond_dev->master;
+ if (master_dev)
+ if ((master_dev->priv_flags & IFF_EBRIDGE)
+ && (bond_dev->priv_flags & IFF_BRIDGE_PORT))
+ __bond_resend_igmp_join_requests(master_dev);
+
+ /* rejoin all groups on vlan devices */
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ rcu_read_lock();
+ vlan_dev = __vlan_find_dev_deep(bond_dev,
+ vlan->vlan_id);
+ rcu_read_unlock();
+ if (vlan_dev)
+ __bond_resend_igmp_join_requests(vlan_dev);
+ }
+
+ if (--bond->igmp_retrans > 0)
+ queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
+
+ read_unlock(&bond->lock);
+}
+
+static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ mcast_work.work);
+ bond_resend_igmp_join_requests(bond);
+}
+
+/*
+ * flush all members of flush->mc_list from device dev->mc_list
+ */
+static void bond_mc_list_flush(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct netdev_hw_addr *ha;
+
+ netdev_for_each_mc_addr(ha, bond_dev)
+ dev_mc_del(slave_dev, ha->addr);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* del lacpdu mc addr from mc list */
+ u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+ dev_mc_del(slave_dev, lacpdu_multicast);
+ }
+}
+
+/*--------------------------- Active slave change ---------------------------*/
+
+/*
+ * Update the mc list and multicast-related flags for the new and
+ * old active slaves (if any) according to the multicast mode, and
+ * promiscuous flags unconditionally.
+ */
+static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
+ struct slave *old_active)
+{
+ struct netdev_hw_addr *ha;
+
+ if (!USES_PRIMARY(bond->params.mode))
+ /* nothing to do - mc list is already up-to-date on
+ * all slaves
+ */
+ return;
+
+ if (old_active) {
+ if (bond->dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(old_active->dev, -1);
+
+ if (bond->dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(old_active->dev, -1);
+
+ netdev_for_each_mc_addr(ha, bond->dev)
+ dev_mc_del(old_active->dev, ha->addr);
+ }
+
+ if (new_active) {
+ /* FIXME: Signal errors upstream. */
+ if (bond->dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(new_active->dev, 1);
+
+ if (bond->dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(new_active->dev, 1);
+
+ netdev_for_each_mc_addr(ha, bond->dev)
+ dev_mc_add(new_active->dev, ha->addr);
+ }
+}
+
+/*
+ * bond_do_fail_over_mac
+ *
+ * Perform special MAC address swapping for fail_over_mac settings
+ *
+ * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
+ */
+static void bond_do_fail_over_mac(struct bonding *bond,
+ struct slave *new_active,
+ struct slave *old_active)
+ __releases(&bond->curr_slave_lock)
+ __releases(&bond->lock)
+ __acquires(&bond->lock)
+ __acquires(&bond->curr_slave_lock)
+{
+ u8 tmp_mac[ETH_ALEN];
+ struct sockaddr saddr;
+ int rv;
+
+ switch (bond->params.fail_over_mac) {
+ case BOND_FOM_ACTIVE:
+ if (new_active) {
+ memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
+ new_active->dev->addr_len);
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+ }
+ break;
+ case BOND_FOM_FOLLOW:
+ /*
+ * if new_active && old_active, swap them
+ * if just old_active, do nothing (going to no active slave)
+ * if just new_active, set new_active to bond's MAC
+ */
+ if (!new_active)
+ return;
+
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+
+ if (old_active) {
+ memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
+ memcpy(saddr.sa_data, old_active->dev->dev_addr,
+ ETH_ALEN);
+ saddr.sa_family = new_active->dev->type;
+ } else {
+ memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
+ saddr.sa_family = bond->dev->type;
+ }
+
+ rv = dev_set_mac_address(new_active->dev, &saddr);
+ if (rv) {
+ pr_err("%s: Error %d setting MAC of slave %s\n",
+ bond->dev->name, -rv, new_active->dev->name);
+ goto out;
+ }
+
+ if (!old_active)
+ goto out;
+
+ memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
+ saddr.sa_family = old_active->dev->type;
+
+ rv = dev_set_mac_address(old_active->dev, &saddr);
+ if (rv)
+ pr_err("%s: Error %d setting MAC of slave %s\n",
+ bond->dev->name, -rv, new_active->dev->name);
+out:
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+ break;
+ default:
+ pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
+ bond->dev->name, bond->params.fail_over_mac);
+ break;
+ }
+
+}
+
+static bool bond_should_change_active(struct bonding *bond)
+{
+ struct slave *prim = bond->primary_slave;
+ struct slave *curr = bond->curr_active_slave;
+
+ if (!prim || !curr || curr->link != BOND_LINK_UP)
+ return true;
+ if (bond->force_primary) {
+ bond->force_primary = false;
+ return true;
+ }
+ if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
+ (prim->speed < curr->speed ||
+ (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
+ return false;
+ if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
+ return false;
+ return true;
+}
+
+/**
+ * find_best_interface - select the best available slave to be the active one
+ * @bond: our bonding struct
+ *
+ * Warning: Caller must hold curr_slave_lock for writing.
+ */
+static struct slave *bond_find_best_slave(struct bonding *bond)
+{
+ struct slave *new_active, *old_active;
+ struct slave *bestslave = NULL;
+ int mintime = bond->params.updelay;
+ int i;
+
+ new_active = bond->curr_active_slave;
+
+ if (!new_active) { /* there were no active slaves left */
+ if (bond->slave_cnt > 0) /* found one slave */
+ new_active = bond->first_slave;
+ else
+ return NULL; /* still no slave, return NULL */
+ }
+
+ if ((bond->primary_slave) &&
+ bond->primary_slave->link == BOND_LINK_UP &&
+ bond_should_change_active(bond)) {
+ new_active = bond->primary_slave;
+ }
+
+ /* remember where to stop iterating over the slaves */
+ old_active = new_active;
+
+ bond_for_each_slave_from(bond, new_active, i, old_active) {
+ if (new_active->link == BOND_LINK_UP) {
+ return new_active;
+ } else if (new_active->link == BOND_LINK_BACK &&
+ IS_UP(new_active->dev)) {
+ /* link up, but waiting for stabilization */
+ if (new_active->delay < mintime) {
+ mintime = new_active->delay;
+ bestslave = new_active;
+ }
+ }
+ }
+
+ return bestslave;
+}
+
+static bool bond_should_notify_peers(struct bonding *bond)
+{
+ struct slave *slave = bond->curr_active_slave;
+
+ pr_debug("bond_should_notify_peers: bond %s slave %s\n",
+ bond->dev->name, slave ? slave->dev->name : "NULL");
+
+ if (!slave || !bond->send_peer_notif ||
+ test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
+ return false;
+
+ bond->send_peer_notif--;
+ return true;
+}
+
+/**
+ * change_active_interface - change the active slave into the specified one
+ * @bond: our bonding struct
+ * @new: the new slave to make the active one
+ *
+ * Set the new slave to the bond's settings and unset them on the old
+ * curr_active_slave.
+ * Setting include flags, mc-list, promiscuity, allmulti, etc.
+ *
+ * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
+ * because it is apparently the best available slave we have, even though its
+ * updelay hasn't timed out yet.
+ *
+ * If new_active is not NULL, caller must hold bond->lock for read and
+ * curr_slave_lock for write_bh.
+ */
+void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
+{
+ struct slave *old_active = bond->curr_active_slave;
+
+ if (old_active == new_active)
+ return;
+
+ if (new_active) {
+ new_active->jiffies = jiffies;
+
+ if (new_active->link == BOND_LINK_BACK) {
+ if (USES_PRIMARY(bond->params.mode)) {
+ pr_info("%s: making interface %s the new active one %d ms earlier.\n",
+ bond->dev->name, new_active->dev->name,
+ (bond->params.updelay - new_active->delay) * bond->params.miimon);
+ }
+
+ new_active->delay = 0;
+ new_active->link = BOND_LINK_UP;
+
+ if (bond->params.mode == BOND_MODE_8023AD)
+ bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
+
+ if (bond_is_lb(bond))
+ bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
+ } else {
+ if (USES_PRIMARY(bond->params.mode)) {
+ pr_info("%s: making interface %s the new active one.\n",
+ bond->dev->name, new_active->dev->name);
+ }
+ }
+ }
+
+ if (USES_PRIMARY(bond->params.mode))
+ bond_mc_swap(bond, new_active, old_active);
+
+ if (bond_is_lb(bond)) {
+ bond_alb_handle_active_change(bond, new_active);
+ if (old_active)
+ bond_set_slave_inactive_flags(old_active);
+ if (new_active)
+ bond_set_slave_active_flags(new_active);
+ } else {
+ bond->curr_active_slave = new_active;
+ }
+
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
+ if (old_active)
+ bond_set_slave_inactive_flags(old_active);
+
+ if (new_active) {
+ bool should_notify_peers = false;
+
+ bond_set_slave_active_flags(new_active);
+
+ if (bond->params.fail_over_mac)
+ bond_do_fail_over_mac(bond, new_active,
+ old_active);
+
+ if (netif_running(bond->dev)) {
+ bond->send_peer_notif =
+ bond->params.num_peer_notif;
+ should_notify_peers =
+ bond_should_notify_peers(bond);
+ }
+
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+
+ netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
+ if (should_notify_peers)
+ netdev_bonding_change(bond->dev,
+ NETDEV_NOTIFY_PEERS);
+
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+ }
+ }
+
+ /* resend IGMP joins since active slave has changed or
+ * all were sent on curr_active_slave.
+ * resend only if bond is brought up with the affected
+ * bonding modes and the retransmission is enabled */
+ if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
+ ((USES_PRIMARY(bond->params.mode) && new_active) ||
+ bond->params.mode == BOND_MODE_ROUNDROBIN)) {
+ bond->igmp_retrans = bond->params.resend_igmp;
+ queue_delayed_work(bond->wq, &bond->mcast_work, 0);
+ }
+}
+
+/**
+ * bond_select_active_slave - select a new active slave, if needed
+ * @bond: our bonding struct
+ *
+ * This functions should be called when one of the following occurs:
+ * - The old curr_active_slave has been released or lost its link.
+ * - The primary_slave has got its link back.
+ * - A slave has got its link back and there's no old curr_active_slave.
+ *
+ * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
+ */
+void bond_select_active_slave(struct bonding *bond)
+{
+ struct slave *best_slave;
+ int rv;
+
+ best_slave = bond_find_best_slave(bond);
+ if (best_slave != bond->curr_active_slave) {
+ bond_change_active_slave(bond, best_slave);
+ rv = bond_set_carrier(bond);
+ if (!rv)
+ return;
+
+ if (netif_carrier_ok(bond->dev)) {
+ pr_info("%s: first active interface up!\n",
+ bond->dev->name);
+ } else {
+ pr_info("%s: now running without any active interface !\n",
+ bond->dev->name);
+ }
+ }
+}
+
+/*--------------------------- slave list handling ---------------------------*/
+
+/*
+ * This function attaches the slave to the end of list.
+ *
+ * bond->lock held for writing by caller.
+ */
+static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
+{
+ if (bond->first_slave == NULL) { /* attaching the first slave */
+ new_slave->next = new_slave;
+ new_slave->prev = new_slave;
+ bond->first_slave = new_slave;
+ } else {
+ new_slave->next = bond->first_slave;
+ new_slave->prev = bond->first_slave->prev;
+ new_slave->next->prev = new_slave;
+ new_slave->prev->next = new_slave;
+ }
+
+ bond->slave_cnt++;
+}
+
+/*
+ * This function detaches the slave from the list.
+ * WARNING: no check is made to verify if the slave effectively
+ * belongs to <bond>.
+ * Nothing is freed on return, structures are just unchained.
+ * If any slave pointer in bond was pointing to <slave>,
+ * it should be changed by the calling function.
+ *
+ * bond->lock held for writing by caller.
+ */
+static void bond_detach_slave(struct bonding *bond, struct slave *slave)
+{
+ if (slave->next)
+ slave->next->prev = slave->prev;
+
+ if (slave->prev)
+ slave->prev->next = slave->next;
+
+ if (bond->first_slave == slave) { /* slave is the first slave */
+ if (bond->slave_cnt > 1) { /* there are more slave */
+ bond->first_slave = slave->next;
+ } else {
+ bond->first_slave = NULL; /* slave was the last one */
+ }
+ }
+
+ slave->next = NULL;
+ slave->prev = NULL;
+ bond->slave_cnt--;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+ struct netpoll *np;
+ int err = 0;
+
+ np = kzalloc(sizeof(*np), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!np)
+ goto out;
+
+ np->dev = slave->dev;
+ strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ);
+ err = __netpoll_setup(np);
+ if (err) {
+ kfree(np);
+ goto out;
+ }
+ slave->np = np;
+out:
+ return err;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+ struct netpoll *np = slave->np;
+
+ if (!np)
+ return;
+
+ slave->np = NULL;
+ synchronize_rcu_bh();
+ __netpoll_cleanup(np);
+ kfree(np);
+}
+static inline bool slave_dev_support_netpoll(struct net_device *slave_dev)
+{
+ if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL)
+ return false;
+ if (!slave_dev->netdev_ops->ndo_poll_controller)
+ return false;
+ return true;
+}
+
+static void bond_poll_controller(struct net_device *bond_dev)
+{
+}
+
+static void __bond_netpoll_cleanup(struct bonding *bond)
+{
+ struct slave *slave;
+ int i;
+
+ bond_for_each_slave(bond, slave, i)
+ if (IS_UP(slave->dev))
+ slave_disable_netpoll(slave);
+}
+static void bond_netpoll_cleanup(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ read_lock(&bond->lock);
+ __bond_netpoll_cleanup(bond);
+ read_unlock(&bond->lock);
+}
+
+static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+ struct bonding *bond = netdev_priv(dev);
+ struct slave *slave;
+ int i, err = 0;
+
+ read_lock(&bond->lock);
+ bond_for_each_slave(bond, slave, i) {
+ err = slave_enable_netpoll(slave);
+ if (err) {
+ __bond_netpoll_cleanup(bond);
+ break;
+ }
+ }
+ read_unlock(&bond->lock);
+ return err;
+}
+
+static struct netpoll_info *bond_netpoll_info(struct bonding *bond)
+{
+ return bond->dev->npinfo;
+}
+
+#else
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+ return 0;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+}
+static void bond_netpoll_cleanup(struct net_device *bond_dev)
+{
+}
+#endif
+
+/*---------------------------------- IOCTL ----------------------------------*/
+
+static int bond_sethwaddr(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ pr_debug("bond_dev=%p\n", bond_dev);
+ pr_debug("slave_dev=%p\n", slave_dev);
+ pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
+ memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
+ return 0;
+}
+
+static netdev_features_t bond_fix_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ struct slave *slave;
+ struct bonding *bond = netdev_priv(dev);
+ netdev_features_t mask;
+ int i;
+
+ read_lock(&bond->lock);
+
+ if (!bond->first_slave) {
+ /* Disable adding VLANs to empty bond. But why? --mq */
+ features |= NETIF_F_VLAN_CHALLENGED;
+ goto out;
+ }
+
+ mask = features;
+ features &= ~NETIF_F_ONE_FOR_ALL;
+ features |= NETIF_F_ALL_FOR_ALL;
+
+ bond_for_each_slave(bond, slave, i) {
+ features = netdev_increment_features(features,
+ slave->dev->features,
+ mask);
+ }
+
+out:
+ read_unlock(&bond->lock);
+ return features;
+}
+
+#define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
+ NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
+ NETIF_F_HIGHDMA | NETIF_F_LRO)
+
+static void bond_compute_features(struct bonding *bond)
+{
+ struct slave *slave;
+ struct net_device *bond_dev = bond->dev;
+ netdev_features_t vlan_features = BOND_VLAN_FEATURES;
+ unsigned short max_hard_header_len = ETH_HLEN;
+ unsigned int gso_max_size = GSO_MAX_SIZE;
+ u16 gso_max_segs = GSO_MAX_SEGS;
+ int i;
+
+ read_lock(&bond->lock);
+
+ if (!bond->first_slave)
+ goto done;
+
+ bond_for_each_slave(bond, slave, i) {
+ vlan_features = netdev_increment_features(vlan_features,
+ slave->dev->vlan_features, BOND_VLAN_FEATURES);
+
+ if (slave->dev->hard_header_len > max_hard_header_len)
+ max_hard_header_len = slave->dev->hard_header_len;
+
+ gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
+ gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
+ }
+
+done:
+ bond_dev->vlan_features = vlan_features;
+ bond_dev->hard_header_len = max_hard_header_len;
+ bond_dev->gso_max_segs = gso_max_segs;
+ netif_set_gso_max_size(bond_dev, gso_max_size);
+
+ read_unlock(&bond->lock);
+
+ netdev_change_features(bond_dev);
+}
+
+static void bond_setup_by_slave(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ bond_dev->header_ops = slave_dev->header_ops;
+
+ bond_dev->type = slave_dev->type;
+ bond_dev->hard_header_len = slave_dev->hard_header_len;
+ bond_dev->addr_len = slave_dev->addr_len;
+
+ memcpy(bond_dev->broadcast, slave_dev->broadcast,
+ slave_dev->addr_len);
+ bond->setup_by_slave = 1;
+}
+
+/* On bonding slaves other than the currently active slave, suppress
+ * duplicates except for alb non-mcast/bcast.
+ */
+static bool bond_should_deliver_exact_match(struct sk_buff *skb,
+ struct slave *slave,
+ struct bonding *bond)
+{
+ if (bond_is_slave_inactive(slave)) {
+ if (bond->params.mode == BOND_MODE_ALB &&
+ skb->pkt_type != PACKET_BROADCAST &&
+ skb->pkt_type != PACKET_MULTICAST)
+ return false;
+ return true;
+ }
+ return false;
+}
+
+static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
+{
+ struct sk_buff *skb = *pskb;
+ struct slave *slave;
+ struct bonding *bond;
+ int (*recv_probe)(struct sk_buff *, struct bonding *,
+ struct slave *);
+ int ret = RX_HANDLER_ANOTHER;
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (unlikely(!skb))
+ return RX_HANDLER_CONSUMED;
+
+ *pskb = skb;
+
+ slave = bond_slave_get_rcu(skb->dev);
+ bond = slave->bond;
+
+ if (bond->params.arp_interval)
+ slave->dev->last_rx = jiffies;
+
+ recv_probe = ACCESS_ONCE(bond->recv_probe);
+ if (recv_probe) {
+ struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
+
+ if (likely(nskb)) {
+ ret = recv_probe(nskb, bond, slave);
+ dev_kfree_skb(nskb);
+ if (ret == RX_HANDLER_CONSUMED) {
+ consume_skb(skb);
+ return ret;
+ }
+ }
+ }
+
+ if (bond_should_deliver_exact_match(skb, slave, bond)) {
+ return RX_HANDLER_EXACT;
+ }
+
+ skb->dev = bond->dev;
+
+ if (bond->params.mode == BOND_MODE_ALB &&
+ bond->dev->priv_flags & IFF_BRIDGE_PORT &&
+ skb->pkt_type == PACKET_HOST) {
+
+ if (unlikely(skb_cow_head(skb,
+ skb->data - skb_mac_header(skb)))) {
+ kfree_skb(skb);
+ return RX_HANDLER_CONSUMED;
+ }
+ memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN);
+ }
+
+ return ret;
+}
+
+/* enslave device <slave> to bond device <master> */
+int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
+ struct slave *new_slave = NULL;
+ struct netdev_hw_addr *ha;
+ struct sockaddr addr;
+ int link_reporting;
+ int res = 0;
+
+ if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
+ slave_ops->ndo_do_ioctl == NULL) {
+ pr_warning("%s: Warning: no link monitoring support for %s\n",
+ bond_dev->name, slave_dev->name);
+ }
+
+ /* already enslaved */
+ if (slave_dev->flags & IFF_SLAVE) {
+ pr_debug("Error, Device was already enslaved\n");
+ return -EBUSY;
+ }
+
+ /* vlan challenged mutual exclusion */
+ /* no need to lock since we're protected by rtnl_lock */
+ if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
+ pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
+ if (bond_vlan_used(bond)) {
+ pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
+ bond_dev->name, slave_dev->name, bond_dev->name);
+ return -EPERM;
+ } else {
+ pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
+ bond_dev->name, slave_dev->name,
+ slave_dev->name, bond_dev->name);
+ }
+ } else {
+ pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
+ }
+
+ /*
+ * Old ifenslave binaries are no longer supported. These can
+ * be identified with moderate accuracy by the state of the slave:
+ * the current ifenslave will set the interface down prior to
+ * enslaving it; the old ifenslave will not.
+ */
+ if ((slave_dev->flags & IFF_UP)) {
+ pr_err("%s is up. This may be due to an out of date ifenslave.\n",
+ slave_dev->name);
+ res = -EPERM;
+ goto err_undo_flags;
+ }
+
+ /* set bonding device ether type by slave - bonding netdevices are
+ * created with ether_setup, so when the slave type is not ARPHRD_ETHER
+ * there is a need to override some of the type dependent attribs/funcs.
+ *
+ * bond ether type mutual exclusion - don't allow slaves of dissimilar
+ * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
+ */
+ if (bond->slave_cnt == 0) {
+ if (bond_dev->type != slave_dev->type) {
+ pr_debug("%s: change device type from %d to %d\n",
+ bond_dev->name,
+ bond_dev->type, slave_dev->type);
+
+ res = netdev_bonding_change(bond_dev,
+ NETDEV_PRE_TYPE_CHANGE);
+ res = notifier_to_errno(res);
+ if (res) {
+ pr_err("%s: refused to change device type\n",
+ bond_dev->name);
+ res = -EBUSY;
+ goto err_undo_flags;
+ }
+
+ /* Flush unicast and multicast addresses */
+ dev_uc_flush(bond_dev);
+ dev_mc_flush(bond_dev);
+
+ if (slave_dev->type != ARPHRD_ETHER)
+ bond_setup_by_slave(bond_dev, slave_dev);
+ else {
+ ether_setup(bond_dev);
+ bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ }
+
+ netdev_bonding_change(bond_dev,
+ NETDEV_POST_TYPE_CHANGE);
+ }
+ } else if (bond_dev->type != slave_dev->type) {
+ pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
+ slave_dev->name,
+ slave_dev->type, bond_dev->type);
+ res = -EINVAL;
+ goto err_undo_flags;
+ }
+
+ if (slave_ops->ndo_set_mac_address == NULL) {
+ if (bond->slave_cnt == 0) {
+ pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
+ bond_dev->name);
+ bond->params.fail_over_mac = BOND_FOM_ACTIVE;
+ } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
+ pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
+ bond_dev->name);
+ res = -EOPNOTSUPP;
+ goto err_undo_flags;
+ }
+ }
+
+ call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
+
+ /* If this is the first slave, then we need to set the master's hardware
+ * address to be the same as the slave's. */
+ if (is_zero_ether_addr(bond->dev->dev_addr))
+ memcpy(bond->dev->dev_addr, slave_dev->dev_addr,
+ slave_dev->addr_len);
+
+
+ new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
+ if (!new_slave) {
+ res = -ENOMEM;
+ goto err_undo_flags;
+ }
+
+ /*
+ * Set the new_slave's queue_id to be zero. Queue ID mapping
+ * is set via sysfs or module option if desired.
+ */
+ new_slave->queue_id = 0;
+
+ /* Save slave's original mtu and then set it to match the bond */
+ new_slave->original_mtu = slave_dev->mtu;
+ res = dev_set_mtu(slave_dev, bond->dev->mtu);
+ if (res) {
+ pr_debug("Error %d calling dev_set_mtu\n", res);
+ goto err_free;
+ }
+
+ /*
+ * Save slave's original ("permanent") mac address for modes
+ * that need it, and for restoring it upon release, and then
+ * set it to the master's address
+ */
+ memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
+
+ if (!bond->params.fail_over_mac) {
+ /*
+ * Set slave to master's mac address. The application already
+ * set the master's mac address to that of the first slave
+ */
+ memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
+ addr.sa_family = slave_dev->type;
+ res = dev_set_mac_address(slave_dev, &addr);
+ if (res) {
+ pr_debug("Error %d calling set_mac_address\n", res);
+ goto err_restore_mtu;
+ }
+ }
+
+ res = netdev_set_bond_master(slave_dev, bond_dev);
+ if (res) {
+ pr_debug("Error %d calling netdev_set_bond_master\n", res);
+ goto err_restore_mac;
+ }
+
+ /* open the slave since the application closed it */
+ res = dev_open(slave_dev);
+ if (res) {
+ pr_debug("Opening slave %s failed\n", slave_dev->name);
+ goto err_unset_master;
+ }
+
+ new_slave->bond = bond;
+ new_slave->dev = slave_dev;
+ slave_dev->priv_flags |= IFF_BONDING;
+
+ if (bond_is_lb(bond)) {
+ /* bond_alb_init_slave() must be called before all other stages since
+ * it might fail and we do not want to have to undo everything
+ */
+ res = bond_alb_init_slave(bond, new_slave);
+ if (res)
+ goto err_close;
+ }
+
+ /* If the mode USES_PRIMARY, then the new slave gets the
+ * master's promisc (and mc) settings only if it becomes the
+ * curr_active_slave, and that is taken care of later when calling
+ * bond_change_active()
+ */
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* set promiscuity level to new slave */
+ if (bond_dev->flags & IFF_PROMISC) {
+ res = dev_set_promiscuity(slave_dev, 1);
+ if (res)
+ goto err_close;
+ }
+
+ /* set allmulti level to new slave */
+ if (bond_dev->flags & IFF_ALLMULTI) {
+ res = dev_set_allmulti(slave_dev, 1);
+ if (res)
+ goto err_close;
+ }
+
+ netif_addr_lock_bh(bond_dev);
+ /* upload master's mc_list to new slave */
+ netdev_for_each_mc_addr(ha, bond_dev)
+ dev_mc_add(slave_dev, ha->addr);
+ netif_addr_unlock_bh(bond_dev);
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* add lacpdu mc addr to mc list */
+ u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
+
+ dev_mc_add(slave_dev, lacpdu_multicast);
+ }
+
+ bond_add_vlans_on_slave(bond, slave_dev);
+
+ write_lock_bh(&bond->lock);
+
+ bond_attach_slave(bond, new_slave);
+
+ new_slave->delay = 0;
+ new_slave->link_failure_count = 0;
+
+ write_unlock_bh(&bond->lock);
+
+ bond_compute_features(bond);
+
+ bond_update_speed_duplex(new_slave);
+
+ read_lock(&bond->lock);
+
+ new_slave->last_arp_rx = jiffies;
+
+ if (bond->params.miimon && !bond->params.use_carrier) {
+ link_reporting = bond_check_dev_link(bond, slave_dev, 1);
+
+ if ((link_reporting == -1) && !bond->params.arp_interval) {
+ /*
+ * miimon is set but a bonded network driver
+ * does not support ETHTOOL/MII and
+ * arp_interval is not set. Note: if
+ * use_carrier is enabled, we will never go
+ * here (because netif_carrier is always
+ * supported); thus, we don't need to change
+ * the messages for netif_carrier.
+ */
+ pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
+ bond_dev->name, slave_dev->name);
+ } else if (link_reporting == -1) {
+ /* unable get link status using mii/ethtool */
+ pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
+ bond_dev->name, slave_dev->name);
+ }
+ }
+
+ /* check for initial state */
+ if (!bond->params.miimon ||
+ (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
+ if (bond->params.updelay) {
+ pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
+ new_slave->link = BOND_LINK_BACK;
+ new_slave->delay = bond->params.updelay;
+ } else {
+ pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
+ new_slave->link = BOND_LINK_UP;
+ }
+ new_slave->jiffies = jiffies;
+ } else {
+ pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
+ new_slave->link = BOND_LINK_DOWN;
+ }
+
+ if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
+ /* if there is a primary slave, remember it */
+ if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
+ bond->primary_slave = new_slave;
+ bond->force_primary = true;
+ }
+ }
+
+ write_lock_bh(&bond->curr_slave_lock);
+
+ switch (bond->params.mode) {
+ case BOND_MODE_ACTIVEBACKUP:
+ bond_set_slave_inactive_flags(new_slave);
+ bond_select_active_slave(bond);
+ break;
+ case BOND_MODE_8023AD:
+ /* in 802.3ad mode, the internal mechanism
+ * will activate the slaves in the selected
+ * aggregator
+ */
+ bond_set_slave_inactive_flags(new_slave);
+ /* if this is the first slave */
+ if (bond->slave_cnt == 1) {
+ SLAVE_AD_INFO(new_slave).id = 1;
+ /* Initialize AD with the number of times that the AD timer is called in 1 second
+ * can be called only after the mac address of the bond is set
+ */
+ bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
+ } else {
+ SLAVE_AD_INFO(new_slave).id =
+ SLAVE_AD_INFO(new_slave->prev).id + 1;
+ }
+
+ bond_3ad_bind_slave(new_slave);
+ break;
+ case BOND_MODE_TLB:
+ case BOND_MODE_ALB:
+ bond_set_active_slave(new_slave);
+ bond_set_slave_inactive_flags(new_slave);
+ bond_select_active_slave(bond);
+ break;
+ default:
+ pr_debug("This slave is always active in trunk mode\n");
+
+ /* always active in trunk mode */
+ bond_set_active_slave(new_slave);
+
+ /* In trunking mode there is little meaning to curr_active_slave
+ * anyway (it holds no special properties of the bond device),
+ * so we can change it without calling change_active_interface()
+ */
+ if (!bond->curr_active_slave)
+ bond->curr_active_slave = new_slave;
+
+ break;
+ } /* switch(bond_mode) */
+
+ write_unlock_bh(&bond->curr_slave_lock);
+
+ bond_set_carrier(bond);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ slave_dev->npinfo = bond_netpoll_info(bond);
+ if (slave_dev->npinfo) {
+ if (slave_enable_netpoll(new_slave)) {
+ read_unlock(&bond->lock);
+ pr_info("Error, %s: master_dev is using netpoll, "
+ "but new slave device does not support netpoll.\n",
+ bond_dev->name);
+ res = -EBUSY;
+ goto err_detach;
+ }
+ }
+#endif
+
+ read_unlock(&bond->lock);
+
+ res = bond_create_slave_symlinks(bond_dev, slave_dev);
+ if (res)
+ goto err_detach;
+
+ res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
+ new_slave);
+ if (res) {
+ pr_debug("Error %d calling netdev_rx_handler_register\n", res);
+ goto err_dest_symlinks;
+ }
+
+ pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
+ bond_dev->name, slave_dev->name,
+ bond_is_active_slave(new_slave) ? "n active" : " backup",
+ new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
+
+ /* enslave is successful */
+ return 0;
+
+/* Undo stages on error */
+err_dest_symlinks:
+ bond_destroy_slave_symlinks(bond_dev, slave_dev);
+
+err_detach:
+ write_lock_bh(&bond->lock);
+ bond_detach_slave(bond, new_slave);
+ write_unlock_bh(&bond->lock);
+
+err_close:
+ slave_dev->priv_flags &= ~IFF_BONDING;
+ dev_close(slave_dev);
+
+err_unset_master:
+ netdev_set_bond_master(slave_dev, NULL);
+
+err_restore_mac:
+ if (!bond->params.fail_over_mac) {
+ /* XXX TODO - fom follow mode needs to change master's
+ * MAC if this slave's MAC is in use by the bond, or at
+ * least print a warning.
+ */
+ memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, &addr);
+ }
+
+err_restore_mtu:
+ dev_set_mtu(slave_dev, new_slave->original_mtu);
+
+err_free:
+ kfree(new_slave);
+
+err_undo_flags:
+ bond_compute_features(bond);
+
+ return res;
+}
+
+/*
+ * Try to release the slave device <slave> from the bond device <master>
+ * It is legal to access curr_active_slave without a lock because all the function
+ * is write-locked.
+ *
+ * The rules for slave state should be:
+ * for Active/Backup:
+ * Active stays on all backups go down
+ * for Bonded connections:
+ * The first up interface should be left on and all others downed.
+ */
+int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *oldcurrent;
+ struct sockaddr addr;
+ int old_flags = bond_dev->flags;
+ netdev_features_t old_features = bond_dev->features;
+
+ /* slave is not a slave or master is not master of this slave */
+ if (!(slave_dev->flags & IFF_SLAVE) ||
+ (slave_dev->master != bond_dev)) {
+ pr_err("%s: Error: cannot release %s.\n",
+ bond_dev->name, slave_dev->name);
+ return -EINVAL;
+ }
+
+ block_netpoll_tx();
+ netdev_bonding_change(bond_dev, NETDEV_RELEASE);
+ write_lock_bh(&bond->lock);
+
+ slave = bond_get_slave_by_dev(bond, slave_dev);
+ if (!slave) {
+ /* not a slave of this bond */
+ pr_info("%s: %s not enslaved\n",
+ bond_dev->name, slave_dev->name);
+ write_unlock_bh(&bond->lock);
+ unblock_netpoll_tx();
+ return -EINVAL;
+ }
+
+ write_unlock_bh(&bond->lock);
+ /* unregister rx_handler early so bond_handle_frame wouldn't be called
+ * for this slave anymore.
+ */
+ netdev_rx_handler_unregister(slave_dev);
+ write_lock_bh(&bond->lock);
+
+ if (!bond->params.fail_over_mac) {
+ if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
+ bond->slave_cnt > 1)
+ pr_warning("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
+ bond_dev->name, slave_dev->name,
+ slave->perm_hwaddr,
+ bond_dev->name, slave_dev->name);
+ }
+
+ /* Inform AD package of unbinding of slave. */
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* must be called before the slave is
+ * detached from the list
+ */
+ bond_3ad_unbind_slave(slave);
+ }
+
+ pr_info("%s: releasing %s interface %s\n",
+ bond_dev->name,
+ bond_is_active_slave(slave) ? "active" : "backup",
+ slave_dev->name);
+
+ oldcurrent = bond->curr_active_slave;
+
+ bond->current_arp_slave = NULL;
+
+ /* release the slave from its bond */
+ bond_detach_slave(bond, slave);
+
+ if (bond->primary_slave == slave)
+ bond->primary_slave = NULL;
+
+ if (oldcurrent == slave)
+ bond_change_active_slave(bond, NULL);
+
+ if (bond_is_lb(bond)) {
+ /* Must be called only after the slave has been
+ * detached from the list and the curr_active_slave
+ * has been cleared (if our_slave == old_current),
+ * but before a new active slave is selected.
+ */
+ write_unlock_bh(&bond->lock);
+ bond_alb_deinit_slave(bond, slave);
+ write_lock_bh(&bond->lock);
+ }
+
+ if (oldcurrent == slave) {
+ /*
+ * Note that we hold RTNL over this sequence, so there
+ * is no concern that another slave add/remove event
+ * will interfere.
+ */
+ write_unlock_bh(&bond->lock);
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+
+ bond_select_active_slave(bond);
+
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ write_lock_bh(&bond->lock);
+ }
+
+ if (bond->slave_cnt == 0) {
+ bond_set_carrier(bond);
+
+ /* if the last slave was removed, zero the mac address
+ * of the master so it will be set by the application
+ * to the mac address of the first slave
+ */
+ memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
+
+ if (bond_vlan_used(bond)) {
+ pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
+ bond_dev->name, bond_dev->name);
+ pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
+ bond_dev->name);
+ }
+ }
+
+ write_unlock_bh(&bond->lock);
+ unblock_netpoll_tx();
+
+ if (bond->slave_cnt == 0)
+ call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
+
+ bond_compute_features(bond);
+ if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
+ (old_features & NETIF_F_VLAN_CHALLENGED))
+ pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
+ bond_dev->name, slave_dev->name, bond_dev->name);
+
+ /* must do this from outside any spinlocks */
+ bond_destroy_slave_symlinks(bond_dev, slave_dev);
+
+ bond_del_vlans_from_slave(bond, slave_dev);
+
+ /* If the mode USES_PRIMARY, then we should only remove its
+ * promisc and mc settings if it was the curr_active_slave, but that was
+ * already taken care of above when we detached the slave
+ */
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* unset promiscuity level from slave
+ * NOTE: The NETDEV_CHANGEADDR call above may change the value
+ * of the IFF_PROMISC flag in the bond_dev, but we need the
+ * value of that flag before that change, as that was the value
+ * when this slave was attached, so we cache at the start of the
+ * function and use it here. Same goes for ALLMULTI below
+ */
+ if (old_flags & IFF_PROMISC)
+ dev_set_promiscuity(slave_dev, -1);
+
+ /* unset allmulti level from slave */
+ if (old_flags & IFF_ALLMULTI)
+ dev_set_allmulti(slave_dev, -1);
+
+ /* flush master's mc_list from slave */
+ netif_addr_lock_bh(bond_dev);
+ bond_mc_list_flush(bond_dev, slave_dev);
+ netif_addr_unlock_bh(bond_dev);
+ }
+
+ netdev_set_bond_master(slave_dev, NULL);
+
+ slave_disable_netpoll(slave);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave_dev);
+
+ if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
+ /* restore original ("permanent") mac address */
+ memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, &addr);
+ }
+
+ dev_set_mtu(slave_dev, slave->original_mtu);
+
+ slave_dev->priv_flags &= ~IFF_BONDING;
+
+ kfree(slave);
+
+ return 0; /* deletion OK */
+}
+
+/*
+* First release a slave and then destroy the bond if no more slaves are left.
+* Must be under rtnl_lock when this function is called.
+*/
+static int bond_release_and_destroy(struct net_device *bond_dev,
+ struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ int ret;
+
+ ret = bond_release(bond_dev, slave_dev);
+ if ((ret == 0) && (bond->slave_cnt == 0)) {
+ bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
+ pr_info("%s: destroying bond %s.\n",
+ bond_dev->name, bond_dev->name);
+ unregister_netdevice(bond_dev);
+ }
+ return ret;
+}
+
+/*
+ * This function releases all slaves.
+ */
+static int bond_release_all(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave;
+ struct net_device *slave_dev;
+ struct sockaddr addr;
+
+ write_lock_bh(&bond->lock);
+
+ netif_carrier_off(bond_dev);
+
+ if (bond->slave_cnt == 0)
+ goto out;
+
+ bond->current_arp_slave = NULL;
+ bond->primary_slave = NULL;
+ bond_change_active_slave(bond, NULL);
+
+ while ((slave = bond->first_slave) != NULL) {
+ /* Inform AD package of unbinding of slave
+ * before slave is detached from the list.
+ */
+ if (bond->params.mode == BOND_MODE_8023AD)
+ bond_3ad_unbind_slave(slave);
+
+ slave_dev = slave->dev;
+ bond_detach_slave(bond, slave);
+
+ /* now that the slave is detached, unlock and perform
+ * all the undo steps that should not be called from
+ * within a lock.
+ */
+ write_unlock_bh(&bond->lock);
+
+ /* unregister rx_handler early so bond_handle_frame wouldn't
+ * be called for this slave anymore.
+ */
+ netdev_rx_handler_unregister(slave_dev);
+ synchronize_net();
+
+ if (bond_is_lb(bond)) {
+ /* must be called only after the slave
+ * has been detached from the list
+ */
+ bond_alb_deinit_slave(bond, slave);
+ }
+
+ bond_destroy_slave_symlinks(bond_dev, slave_dev);
+ bond_del_vlans_from_slave(bond, slave_dev);
+
+ /* If the mode USES_PRIMARY, then we should only remove its
+ * promisc and mc settings if it was the curr_active_slave, but that was
+ * already taken care of above when we detached the slave
+ */
+ if (!USES_PRIMARY(bond->params.mode)) {
+ /* unset promiscuity level from slave */
+ if (bond_dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(slave_dev, -1);
+
+ /* unset allmulti level from slave */
+ if (bond_dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(slave_dev, -1);
+
+ /* flush master's mc_list from slave */
+ netif_addr_lock_bh(bond_dev);
+ bond_mc_list_flush(bond_dev, slave_dev);
+ netif_addr_unlock_bh(bond_dev);
+ }
+
+ netdev_set_bond_master(slave_dev, NULL);
+
+ slave_disable_netpoll(slave);
+
+ /* close slave before restoring its mac address */
+ dev_close(slave_dev);
+
+ if (!bond->params.fail_over_mac) {
+ /* restore original ("permanent") mac address*/
+ memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
+ addr.sa_family = slave_dev->type;
+ dev_set_mac_address(slave_dev, &addr);
+ }
+
+ kfree(slave);
+
+ /* re-acquire the lock before getting the next slave */
+ write_lock_bh(&bond->lock);
+ }
+
+ /* zero the mac address of the master so it will be
+ * set by the application to the mac address of the
+ * first slave
+ */
+ memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
+
+ if (bond_vlan_used(bond)) {
+ pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
+ bond_dev->name, bond_dev->name);
+ pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
+ bond_dev->name);
+ }
+
+ pr_info("%s: released all slaves\n", bond_dev->name);
+
+out:
+ write_unlock_bh(&bond->lock);
+
+ bond_compute_features(bond);
+
+ return 0;
+}
+
+/*
+ * This function changes the active slave to slave <slave_dev>.
+ * It returns -EINVAL in the following cases.
+ * - <slave_dev> is not found in the list.
+ * - There is not active slave now.
+ * - <slave_dev> is already active.
+ * - The link state of <slave_dev> is not BOND_LINK_UP.
+ * - <slave_dev> is not running.
+ * In these cases, this function does nothing.
+ * In the other cases, current_slave pointer is changed and 0 is returned.
+ */
+static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *old_active = NULL;
+ struct slave *new_active = NULL;
+ int res = 0;
+
+ if (!USES_PRIMARY(bond->params.mode))
+ return -EINVAL;
+
+ /* Verify that master_dev is indeed the master of slave_dev */
+ if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
+ return -EINVAL;
+
+ read_lock(&bond->lock);
+
+ read_lock(&bond->curr_slave_lock);
+ old_active = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ new_active = bond_get_slave_by_dev(bond, slave_dev);
+
+ /*
+ * Changing to the current active: do nothing; return success.
+ */
+ if (new_active && (new_active == old_active)) {
+ read_unlock(&bond->lock);
+ return 0;
+ }
+
+ if ((new_active) &&
+ (old_active) &&
+ (new_active->link == BOND_LINK_UP) &&
+ IS_UP(new_active->dev)) {
+ block_netpoll_tx();
+ write_lock_bh(&bond->curr_slave_lock);
+ bond_change_active_slave(bond, new_active);
+ write_unlock_bh(&bond->curr_slave_lock);
+ unblock_netpoll_tx();
+ } else
+ res = -EINVAL;
+
+ read_unlock(&bond->lock);
+
+ return res;
+}
+
+static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ info->bond_mode = bond->params.mode;
+ info->miimon = bond->params.miimon;
+
+ read_lock(&bond->lock);
+ info->num_slaves = bond->slave_cnt;
+ read_unlock(&bond->lock);
+
+ return 0;
+}
+
+static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave;
+ int i, res = -ENODEV;
+
+ read_lock(&bond->lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ if (i == (int)info->slave_id) {
+ res = 0;
+ strcpy(info->slave_name, slave->dev->name);
+ info->link = slave->link;
+ info->state = bond_slave_state(slave);
+ info->link_failure_count = slave->link_failure_count;
+ break;
+ }
+ }
+
+ read_unlock(&bond->lock);
+
+ return res;
+}
+
+/*-------------------------------- Monitoring -------------------------------*/
+
+
+static int bond_miimon_inspect(struct bonding *bond)
+{
+ struct slave *slave;
+ int i, link_state, commit = 0;
+ bool ignore_updelay;
+
+ ignore_updelay = !bond->curr_active_slave ? true : false;
+
+ bond_for_each_slave(bond, slave, i) {
+ slave->new_link = BOND_LINK_NOCHANGE;
+
+ link_state = bond_check_dev_link(bond, slave->dev, 0);
+
+ switch (slave->link) {
+ case BOND_LINK_UP:
+ if (link_state)
+ continue;
+
+ slave->link = BOND_LINK_FAIL;
+ slave->delay = bond->params.downdelay;
+ if (slave->delay) {
+ pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
+ bond->dev->name,
+ (bond->params.mode ==
+ BOND_MODE_ACTIVEBACKUP) ?
+ (bond_is_active_slave(slave) ?
+ "active " : "backup ") : "",
+ slave->dev->name,
+ bond->params.downdelay * bond->params.miimon);
+ }
+ /*FALLTHRU*/
+ case BOND_LINK_FAIL:
+ if (link_state) {
+ /*
+ * recovered before downdelay expired
+ */
+ slave->link = BOND_LINK_UP;
+ slave->jiffies = jiffies;
+ pr_info("%s: link status up again after %d ms for interface %s.\n",
+ bond->dev->name,
+ (bond->params.downdelay - slave->delay) *
+ bond->params.miimon,
+ slave->dev->name);
+ continue;
+ }
+
+ if (slave->delay <= 0) {
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ continue;
+ }
+
+ slave->delay--;
+ break;
+
+ case BOND_LINK_DOWN:
+ if (!link_state)
+ continue;
+
+ slave->link = BOND_LINK_BACK;
+ slave->delay = bond->params.updelay;
+
+ if (slave->delay) {
+ pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
+ bond->dev->name, slave->dev->name,
+ ignore_updelay ? 0 :
+ bond->params.updelay *
+ bond->params.miimon);
+ }
+ /*FALLTHRU*/
+ case BOND_LINK_BACK:
+ if (!link_state) {
+ slave->link = BOND_LINK_DOWN;
+ pr_info("%s: link status down again after %d ms for interface %s.\n",
+ bond->dev->name,
+ (bond->params.updelay - slave->delay) *
+ bond->params.miimon,
+ slave->dev->name);
+
+ continue;
+ }
+
+ if (ignore_updelay)
+ slave->delay = 0;
+
+ if (slave->delay <= 0) {
+ slave->new_link = BOND_LINK_UP;
+ commit++;
+ ignore_updelay = false;
+ continue;
+ }
+
+ slave->delay--;
+ break;
+ }
+ }
+
+ return commit;
+}
+
+static void bond_miimon_commit(struct bonding *bond)
+{
+ struct slave *slave;
+ int i;
+
+ bond_for_each_slave(bond, slave, i) {
+ switch (slave->new_link) {
+ case BOND_LINK_NOCHANGE:
+ continue;
+
+ case BOND_LINK_UP:
+ slave->link = BOND_LINK_UP;
+ slave->jiffies = jiffies;
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* prevent it from being the active one */
+ bond_set_backup_slave(slave);
+ } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
+ /* make it immediately active */
+ bond_set_active_slave(slave);
+ } else if (slave != bond->primary_slave) {
+ /* prevent it from being the active one */
+ bond_set_backup_slave(slave);
+ }
+
+ pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
+ bond->dev->name, slave->dev->name,
+ slave->speed, slave->duplex ? "full" : "half");
+
+ /* notify ad that the link status has changed */
+ if (bond->params.mode == BOND_MODE_8023AD)
+ bond_3ad_handle_link_change(slave, BOND_LINK_UP);
+
+ if (bond_is_lb(bond))
+ bond_alb_handle_link_change(bond, slave,
+ BOND_LINK_UP);
+
+ if (!bond->curr_active_slave ||
+ (slave == bond->primary_slave))
+ goto do_failover;
+
+ continue;
+
+ case BOND_LINK_DOWN:
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ slave->link = BOND_LINK_DOWN;
+
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
+ bond->params.mode == BOND_MODE_8023AD)
+ bond_set_slave_inactive_flags(slave);
+
+ pr_info("%s: link status definitely down for interface %s, disabling it\n",
+ bond->dev->name, slave->dev->name);
+
+ if (bond->params.mode == BOND_MODE_8023AD)
+ bond_3ad_handle_link_change(slave,
+ BOND_LINK_DOWN);
+
+ if (bond_is_lb(bond))
+ bond_alb_handle_link_change(bond, slave,
+ BOND_LINK_DOWN);
+
+ if (slave == bond->curr_active_slave)
+ goto do_failover;
+
+ continue;
+
+ default:
+ pr_err("%s: invalid new link %d on slave %s\n",
+ bond->dev->name, slave->new_link,
+ slave->dev->name);
+ slave->new_link = BOND_LINK_NOCHANGE;
+
+ continue;
+ }
+
+do_failover:
+ ASSERT_RTNL();
+ block_netpoll_tx();
+ write_lock_bh(&bond->curr_slave_lock);
+ bond_select_active_slave(bond);
+ write_unlock_bh(&bond->curr_slave_lock);
+ unblock_netpoll_tx();
+ }
+
+ bond_set_carrier(bond);
+}
+
+/*
+ * bond_mii_monitor
+ *
+ * Really a wrapper that splits the mii monitor into two phases: an
+ * inspection, then (if inspection indicates something needs to be done)
+ * an acquisition of appropriate locks followed by a commit phase to
+ * implement whatever link state changes are indicated.
+ */
+void bond_mii_monitor(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ mii_work.work);
+ bool should_notify_peers = false;
+ unsigned long delay;
+
+ read_lock(&bond->lock);
+
+ delay = msecs_to_jiffies(bond->params.miimon);
+
+ if (bond->slave_cnt == 0)
+ goto re_arm;
+
+ should_notify_peers = bond_should_notify_peers(bond);
+
+ if (bond_miimon_inspect(bond)) {
+ read_unlock(&bond->lock);
+
+ /* Race avoidance with bond_close cancel of workqueue */
+ if (!rtnl_trylock()) {
+ read_lock(&bond->lock);
+ delay = 1;
+ should_notify_peers = false;
+ goto re_arm;
+ }
+
+ read_lock(&bond->lock);
+
+ bond_miimon_commit(bond);
+
+ read_unlock(&bond->lock);
+ rtnl_unlock(); /* might sleep, hold no other locks */
+ read_lock(&bond->lock);
+ }
+
+re_arm:
+ if (bond->params.miimon)
+ queue_delayed_work(bond->wq, &bond->mii_work, delay);
+
+ read_unlock(&bond->lock);
+
+ if (should_notify_peers) {
+ if (!rtnl_trylock()) {
+ read_lock(&bond->lock);
+ bond->send_peer_notif++;
+ read_unlock(&bond->lock);
+ return;
+ }
+ netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS);
+ rtnl_unlock();
+ }
+}
+
+static int bond_has_this_ip(struct bonding *bond, __be32 ip)
+{
+ struct vlan_entry *vlan;
+ struct net_device *vlan_dev;
+
+ if (ip == bond_confirm_addr(bond->dev, 0, ip))
+ return 1;
+
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ rcu_read_lock();
+ vlan_dev = __vlan_find_dev_deep(bond->dev, vlan->vlan_id);
+ rcu_read_unlock();
+ if (vlan_dev && ip == bond_confirm_addr(vlan_dev, 0, ip))
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * We go to the (large) trouble of VLAN tagging ARP frames because
+ * switches in VLAN mode (especially if ports are configured as
+ * "native" to a VLAN) might not pass non-tagged frames.
+ */
+static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
+{
+ struct sk_buff *skb;
+
+ pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
+ slave_dev->name, dest_ip, src_ip, vlan_id);
+
+ skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
+ NULL, slave_dev->dev_addr, NULL);
+
+ if (!skb) {
+ pr_err("ARP packet allocation failed\n");
+ return;
+ }
+ if (vlan_id) {
+ skb = vlan_put_tag(skb, vlan_id);
+ if (!skb) {
+ pr_err("failed to insert VLAN tag\n");
+ return;
+ }
+ }
+ arp_xmit(skb);
+}
+
+
+static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
+{
+ int i, vlan_id;
+ __be32 *targets = bond->params.arp_targets;
+ struct vlan_entry *vlan;
+ struct net_device *vlan_dev = NULL;
+ struct rtable *rt;
+
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
+ __be32 addr;
+ if (!targets[i])
+ break;
+ pr_debug("basa: target %x\n", targets[i]);
+ if (!bond_vlan_used(bond)) {
+ pr_debug("basa: empty vlan: arp_send\n");
+ addr = bond_confirm_addr(bond->dev, targets[i], 0);
+ bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+ addr, 0);
+ continue;
+ }
+
+ /*
+ * If VLANs are configured, we do a route lookup to
+ * determine which VLAN interface would be used, so we
+ * can tag the ARP with the proper VLAN tag.
+ */
+ rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
+ RTO_ONLINK, 0);
+ if (IS_ERR(rt)) {
+ if (net_ratelimit()) {
+ pr_warning("%s: no route to arp_ip_target %pI4\n",
+ bond->dev->name, &targets[i]);
+ }
+ continue;
+ }
+
+ /*
+ * This target is not on a VLAN
+ */
+ if (rt->dst.dev == bond->dev) {
+ ip_rt_put(rt);
+ pr_debug("basa: rtdev == bond->dev: arp_send\n");
+ addr = bond_confirm_addr(bond->dev, targets[i], 0);
+ bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+ addr, 0);
+ continue;
+ }
+
+ vlan_id = 0;
+ list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
+ rcu_read_lock();
+ vlan_dev = __vlan_find_dev_deep(bond->dev,
+ vlan->vlan_id);
+ rcu_read_unlock();
+ if (vlan_dev == rt->dst.dev) {
+ vlan_id = vlan->vlan_id;
+ pr_debug("basa: vlan match on %s %d\n",
+ vlan_dev->name, vlan_id);
+ break;
+ }
+ }
+
+ if (vlan_id && vlan_dev) {
+ ip_rt_put(rt);
+ addr = bond_confirm_addr(vlan_dev, targets[i], 0);
+ bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
+ addr, vlan_id);
+ continue;
+ }
+
+ if (net_ratelimit()) {
+ pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
+ bond->dev->name, &targets[i],
+ rt->dst.dev ? rt->dst.dev->name : "NULL");
+ }
+ ip_rt_put(rt);
+ }
+}
+
+static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
+{
+ int i;
+ __be32 *targets = bond->params.arp_targets;
+
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
+ pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
+ &sip, &tip, i, &targets[i],
+ bond_has_this_ip(bond, tip));
+ if (sip == targets[i]) {
+ if (bond_has_this_ip(bond, tip))
+ slave->last_arp_rx = jiffies;
+ return;
+ }
+ }
+}
+
+static int bond_arp_rcv(struct sk_buff *skb, struct bonding *bond,
+ struct slave *slave)
+{
+ struct arphdr *arp;
+ unsigned char *arp_ptr;
+ __be32 sip, tip;
+
+ if (skb->protocol != __cpu_to_be16(ETH_P_ARP))
+ return RX_HANDLER_ANOTHER;
+
+ read_lock(&bond->lock);
+
+ pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
+ bond->dev->name, skb->dev->name);
+
+ if (!pskb_may_pull(skb, arp_hdr_len(bond->dev)))
+ goto out_unlock;
+
+ arp = arp_hdr(skb);
+ if (arp->ar_hln != bond->dev->addr_len ||
+ skb->pkt_type == PACKET_OTHERHOST ||
+ skb->pkt_type == PACKET_LOOPBACK ||
+ arp->ar_hrd != htons(ARPHRD_ETHER) ||
+ arp->ar_pro != htons(ETH_P_IP) ||
+ arp->ar_pln != 4)
+ goto out_unlock;
+
+ arp_ptr = (unsigned char *)(arp + 1);
+ arp_ptr += bond->dev->addr_len;
+ memcpy(&sip, arp_ptr, 4);
+ arp_ptr += 4 + bond->dev->addr_len;
+ memcpy(&tip, arp_ptr, 4);
+
+ pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
+ bond->dev->name, slave->dev->name, bond_slave_state(slave),
+ bond->params.arp_validate, slave_do_arp_validate(bond, slave),
+ &sip, &tip);
+
+ /*
+ * Backup slaves won't see the ARP reply, but do come through
+ * here for each ARP probe (so we swap the sip/tip to validate
+ * the probe). In a "redundant switch, common router" type of
+ * configuration, the ARP probe will (hopefully) travel from
+ * the active, through one switch, the router, then the other
+ * switch before reaching the backup.
+ */
+ if (bond_is_active_slave(slave))
+ bond_validate_arp(bond, slave, sip, tip);
+ else
+ bond_validate_arp(bond, slave, tip, sip);
+
+out_unlock:
+ read_unlock(&bond->lock);
+ return RX_HANDLER_ANOTHER;
+}
+
+/*
+ * this function is called regularly to monitor each slave's link
+ * ensuring that traffic is being sent and received when arp monitoring
+ * is used in load-balancing mode. if the adapter has been dormant, then an
+ * arp is transmitted to generate traffic. see activebackup_arp_monitor for
+ * arp monitoring in active backup mode.
+ */
+void bond_loadbalance_arp_mon(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ arp_work.work);
+ struct slave *slave, *oldcurrent;
+ int do_failover = 0;
+ int delta_in_ticks;
+ int i;
+
+ read_lock(&bond->lock);
+
+ delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
+
+ if (bond->slave_cnt == 0)
+ goto re_arm;
+
+ read_lock(&bond->curr_slave_lock);
+ oldcurrent = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ /* see if any of the previous devices are up now (i.e. they have
+ * xmt and rcv traffic). the curr_active_slave does not come into
+ * the picture unless it is null. also, slave->jiffies is not needed
+ * here because we send an arp on each slave and give a slave as
+ * long as it needs to get the tx/rx within the delta.
+ * TODO: what about up/down delay in arp mode? it wasn't here before
+ * so it can wait
+ */
+ bond_for_each_slave(bond, slave, i) {
+ unsigned long trans_start = dev_trans_start(slave->dev);
+
+ if (slave->link != BOND_LINK_UP) {
+ if (time_in_range(jiffies,
+ trans_start - delta_in_ticks,
+ trans_start + delta_in_ticks) &&
+ time_in_range(jiffies,
+ slave->dev->last_rx - delta_in_ticks,
+ slave->dev->last_rx + delta_in_ticks)) {
+
+ slave->link = BOND_LINK_UP;
+ bond_set_active_slave(slave);
+
+ /* primary_slave has no meaning in round-robin
+ * mode. the window of a slave being up and
+ * curr_active_slave being null after enslaving
+ * is closed.
+ */
+ if (!oldcurrent) {
+ pr_info("%s: link status definitely up for interface %s, ",
+ bond->dev->name,
+ slave->dev->name);
+ do_failover = 1;
+ } else {
+ pr_info("%s: interface %s is now up\n",
+ bond->dev->name,
+ slave->dev->name);
+ }
+ }
+ } else {
+ /* slave->link == BOND_LINK_UP */
+
+ /* not all switches will respond to an arp request
+ * when the source ip is 0, so don't take the link down
+ * if we don't know our ip yet
+ */
+ if (!time_in_range(jiffies,
+ trans_start - delta_in_ticks,
+ trans_start + 2 * delta_in_ticks) ||
+ !time_in_range(jiffies,
+ slave->dev->last_rx - delta_in_ticks,
+ slave->dev->last_rx + 2 * delta_in_ticks)) {
+
+ slave->link = BOND_LINK_DOWN;
+ bond_set_backup_slave(slave);
+
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ pr_info("%s: interface %s is now down.\n",
+ bond->dev->name,
+ slave->dev->name);
+
+ if (slave == oldcurrent)
+ do_failover = 1;
+ }
+ }
+
+ /* note: if switch is in round-robin mode, all links
+ * must tx arp to ensure all links rx an arp - otherwise
+ * links may oscillate or not come up at all; if switch is
+ * in something like xor mode, there is nothing we can
+ * do - all replies will be rx'ed on same link causing slaves
+ * to be unstable during low/no traffic periods
+ */
+ if (IS_UP(slave->dev))
+ bond_arp_send_all(bond, slave);
+ }
+
+ if (do_failover) {
+ block_netpoll_tx();
+ write_lock_bh(&bond->curr_slave_lock);
+
+ bond_select_active_slave(bond);
+
+ write_unlock_bh(&bond->curr_slave_lock);
+ unblock_netpoll_tx();
+ }
+
+re_arm:
+ if (bond->params.arp_interval)
+ queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
+
+ read_unlock(&bond->lock);
+}
+
+/*
+ * Called to inspect slaves for active-backup mode ARP monitor link state
+ * changes. Sets new_link in slaves to specify what action should take
+ * place for the slave. Returns 0 if no changes are found, >0 if changes
+ * to link states must be committed.
+ *
+ * Called with bond->lock held for read.
+ */
+static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
+{
+ struct slave *slave;
+ int i, commit = 0;
+ unsigned long trans_start;
+
+ bond_for_each_slave(bond, slave, i) {
+ slave->new_link = BOND_LINK_NOCHANGE;
+
+ if (slave->link != BOND_LINK_UP) {
+ if (time_in_range(jiffies,
+ slave_last_rx(bond, slave) - delta_in_ticks,
+ slave_last_rx(bond, slave) + delta_in_ticks)) {
+
+ slave->new_link = BOND_LINK_UP;
+ commit++;
+ }
+
+ continue;
+ }
+
+ /*
+ * Give slaves 2*delta after being enslaved or made
+ * active. This avoids bouncing, as the last receive
+ * times need a full ARP monitor cycle to be updated.
+ */
+ if (time_in_range(jiffies,
+ slave->jiffies - delta_in_ticks,
+ slave->jiffies + 2 * delta_in_ticks))
+ continue;
+
+ /*
+ * Backup slave is down if:
+ * - No current_arp_slave AND
+ * - more than 3*delta since last receive AND
+ * - the bond has an IP address
+ *
+ * Note: a non-null current_arp_slave indicates
+ * the curr_active_slave went down and we are
+ * searching for a new one; under this condition
+ * we only take the curr_active_slave down - this
+ * gives each slave a chance to tx/rx traffic
+ * before being taken out
+ */
+ if (!bond_is_active_slave(slave) &&
+ !bond->current_arp_slave &&
+ !time_in_range(jiffies,
+ slave_last_rx(bond, slave) - delta_in_ticks,
+ slave_last_rx(bond, slave) + 3 * delta_in_ticks)) {
+
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ }
+
+ /*
+ * Active slave is down if:
+ * - more than 2*delta since transmitting OR
+ * - (more than 2*delta since receive AND
+ * the bond has an IP address)
+ */
+ trans_start = dev_trans_start(slave->dev);
+ if (bond_is_active_slave(slave) &&
+ (!time_in_range(jiffies,
+ trans_start - delta_in_ticks,
+ trans_start + 2 * delta_in_ticks) ||
+ !time_in_range(jiffies,
+ slave_last_rx(bond, slave) - delta_in_ticks,
+ slave_last_rx(bond, slave) + 2 * delta_in_ticks))) {
+
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ }
+ }
+
+ return commit;
+}
+
+/*
+ * Called to commit link state changes noted by inspection step of
+ * active-backup mode ARP monitor.
+ *
+ * Called with RTNL and bond->lock for read.
+ */
+static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
+{
+ struct slave *slave;
+ int i;
+ unsigned long trans_start;
+
+ bond_for_each_slave(bond, slave, i) {
+ switch (slave->new_link) {
+ case BOND_LINK_NOCHANGE:
+ continue;
+
+ case BOND_LINK_UP:
+ trans_start = dev_trans_start(slave->dev);
+ if ((!bond->curr_active_slave &&
+ time_in_range(jiffies,
+ trans_start - delta_in_ticks,
+ trans_start + delta_in_ticks)) ||
+ bond->curr_active_slave != slave) {
+ slave->link = BOND_LINK_UP;
+ if (bond->current_arp_slave) {
+ bond_set_slave_inactive_flags(
+ bond->current_arp_slave);
+ bond->current_arp_slave = NULL;
+ }
+
+ pr_info("%s: link status definitely up for interface %s.\n",
+ bond->dev->name, slave->dev->name);
+
+ if (!bond->curr_active_slave ||
+ (slave == bond->primary_slave))
+ goto do_failover;
+
+ }
+
+ continue;
+
+ case BOND_LINK_DOWN:
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ slave->link = BOND_LINK_DOWN;
+ bond_set_slave_inactive_flags(slave);
+
+ pr_info("%s: link status definitely down for interface %s, disabling it\n",
+ bond->dev->name, slave->dev->name);
+
+ if (slave == bond->curr_active_slave) {
+ bond->current_arp_slave = NULL;
+ goto do_failover;
+ }
+
+ continue;
+
+ default:
+ pr_err("%s: impossible: new_link %d on slave %s\n",
+ bond->dev->name, slave->new_link,
+ slave->dev->name);
+ continue;
+ }
+
+do_failover:
+ ASSERT_RTNL();
+ block_netpoll_tx();
+ write_lock_bh(&bond->curr_slave_lock);
+ bond_select_active_slave(bond);
+ write_unlock_bh(&bond->curr_slave_lock);
+ unblock_netpoll_tx();
+ }
+
+ bond_set_carrier(bond);
+}
+
+/*
+ * Send ARP probes for active-backup mode ARP monitor.
+ *
+ * Called with bond->lock held for read.
+ */
+static void bond_ab_arp_probe(struct bonding *bond)
+{
+ struct slave *slave;
+ int i;
+
+ read_lock(&bond->curr_slave_lock);
+
+ if (bond->current_arp_slave && bond->curr_active_slave)
+ pr_info("PROBE: c_arp %s && cas %s BAD\n",
+ bond->current_arp_slave->dev->name,
+ bond->curr_active_slave->dev->name);
+
+ if (bond->curr_active_slave) {
+ bond_arp_send_all(bond, bond->curr_active_slave);
+ read_unlock(&bond->curr_slave_lock);
+ return;
+ }
+
+ read_unlock(&bond->curr_slave_lock);
+
+ /* if we don't have a curr_active_slave, search for the next available
+ * backup slave from the current_arp_slave and make it the candidate
+ * for becoming the curr_active_slave
+ */
+
+ if (!bond->current_arp_slave) {
+ bond->current_arp_slave = bond->first_slave;
+ if (!bond->current_arp_slave)
+ return;
+ }
+
+ bond_set_slave_inactive_flags(bond->current_arp_slave);
+
+ /* search for next candidate */
+ bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
+ if (IS_UP(slave->dev)) {
+ slave->link = BOND_LINK_BACK;
+ bond_set_slave_active_flags(slave);
+ bond_arp_send_all(bond, slave);
+ slave->jiffies = jiffies;
+ bond->current_arp_slave = slave;
+ break;
+ }
+
+ /* if the link state is up at this point, we
+ * mark it down - this can happen if we have
+ * simultaneous link failures and
+ * reselect_active_interface doesn't make this
+ * one the current slave so it is still marked
+ * up when it is actually down
+ */
+ if (slave->link == BOND_LINK_UP) {
+ slave->link = BOND_LINK_DOWN;
+ if (slave->link_failure_count < UINT_MAX)
+ slave->link_failure_count++;
+
+ bond_set_slave_inactive_flags(slave);
+
+ pr_info("%s: backup interface %s is now down.\n",
+ bond->dev->name, slave->dev->name);
+ }
+ }
+}
+
+void bond_activebackup_arp_mon(struct work_struct *work)
+{
+ struct bonding *bond = container_of(work, struct bonding,
+ arp_work.work);
+ bool should_notify_peers = false;
+ int delta_in_ticks;
+
+ read_lock(&bond->lock);
+
+ delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
+
+ if (bond->slave_cnt == 0)
+ goto re_arm;
+
+ should_notify_peers = bond_should_notify_peers(bond);
+
+ if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
+ read_unlock(&bond->lock);
+
+ /* Race avoidance with bond_close flush of workqueue */
+ if (!rtnl_trylock()) {
+ read_lock(&bond->lock);
+ delta_in_ticks = 1;
+ should_notify_peers = false;
+ goto re_arm;
+ }
+
+ read_lock(&bond->lock);
+
+ bond_ab_arp_commit(bond, delta_in_ticks);
+
+ read_unlock(&bond->lock);
+ rtnl_unlock();
+ read_lock(&bond->lock);
+ }
+
+ bond_ab_arp_probe(bond);
+
+re_arm:
+ if (bond->params.arp_interval)
+ queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
+
+ read_unlock(&bond->lock);
+
+ if (should_notify_peers) {
+ if (!rtnl_trylock()) {
+ read_lock(&bond->lock);
+ bond->send_peer_notif++;
+ read_unlock(&bond->lock);
+ return;
+ }
+ netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS);
+ rtnl_unlock();
+ }
+}
+
+/*-------------------------- netdev event handling --------------------------*/
+
+/*
+ * Change device name
+ */
+static int bond_event_changename(struct bonding *bond)
+{
+ bond_remove_proc_entry(bond);
+ bond_create_proc_entry(bond);
+
+ bond_debug_reregister(bond);
+
+ return NOTIFY_DONE;
+}
+
+static int bond_master_netdev_event(unsigned long event,
+ struct net_device *bond_dev)
+{
+ struct bonding *event_bond = netdev_priv(bond_dev);
+
+ switch (event) {
+ case NETDEV_CHANGENAME:
+ return bond_event_changename(event_bond);
+ case NETDEV_UNREGISTER:
+ bond_remove_proc_entry(event_bond);
+ break;
+ case NETDEV_REGISTER:
+ bond_create_proc_entry(event_bond);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int bond_slave_netdev_event(unsigned long event,
+ struct net_device *slave_dev)
+{
+ struct net_device *bond_dev = slave_dev->master;
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave = NULL;
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ if (bond_dev) {
+ if (bond->setup_by_slave)
+ bond_release_and_destroy(bond_dev, slave_dev);
+ else
+ bond_release(bond_dev, slave_dev);
+ }
+ break;
+ case NETDEV_UP:
+ case NETDEV_CHANGE:
+ slave = bond_get_slave_by_dev(bond, slave_dev);
+ if (slave) {
+ u32 old_speed = slave->speed;
+ u8 old_duplex = slave->duplex;
+
+ bond_update_speed_duplex(slave);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ if (old_speed != slave->speed)
+ bond_3ad_adapter_speed_changed(slave);
+ if (old_duplex != slave->duplex)
+ bond_3ad_adapter_duplex_changed(slave);
+ }
+ }
+
+ break;
+ case NETDEV_DOWN:
+ /*
+ * ... Or is it this?
+ */
+ break;
+ case NETDEV_CHANGEMTU:
+ /*
+ * TODO: Should slaves be allowed to
+ * independently alter their MTU? For
+ * an active-backup bond, slaves need
+ * not be the same type of device, so
+ * MTUs may vary. For other modes,
+ * slaves arguably should have the
+ * same MTUs. To do this, we'd need to
+ * take over the slave's change_mtu
+ * function for the duration of their
+ * servitude.
+ */
+ break;
+ case NETDEV_CHANGENAME:
+ /*
+ * TODO: handle changing the primary's name
+ */
+ break;
+ case NETDEV_FEAT_CHANGE:
+ bond_compute_features(bond);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * bond_netdev_event: handle netdev notifier chain events.
+ *
+ * This function receives events for the netdev chain. The caller (an
+ * ioctl handler calling blocking_notifier_call_chain) holds the necessary
+ * locks for us to safely manipulate the slave devices (RTNL lock,
+ * dev_probe_lock).
+ */
+static int bond_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct net_device *event_dev = (struct net_device *)ptr;
+
+ pr_debug("event_dev: %s, event: %lx\n",
+ event_dev ? event_dev->name : "None",
+ event);
+
+ if (!(event_dev->priv_flags & IFF_BONDING))
+ return NOTIFY_DONE;
+
+ if (event_dev->flags & IFF_MASTER) {
+ pr_debug("IFF_MASTER\n");
+ return bond_master_netdev_event(event, event_dev);
+ }
+
+ if (event_dev->flags & IFF_SLAVE) {
+ pr_debug("IFF_SLAVE\n");
+ return bond_slave_netdev_event(event, event_dev);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block bond_netdev_notifier = {
+ .notifier_call = bond_netdev_event,
+};
+
+/*---------------------------- Hashing Policies -----------------------------*/
+
+/*
+ * Hash for the output device based upon layer 2 and layer 3 data. If
+ * the packet is not IP mimic bond_xmit_hash_policy_l2()
+ */
+static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
+{
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+ struct iphdr *iph = ip_hdr(skb);
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
+ (data->h_dest[5] ^ data->h_source[5])) % count;
+ }
+
+ return (data->h_dest[5] ^ data->h_source[5]) % count;
+}
+
+/*
+ * Hash for the output device based upon layer 3 and layer 4 data. If
+ * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
+ * altogether not IP, mimic bond_xmit_hash_policy_l2()
+ */
+static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
+{
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+ struct iphdr *iph = ip_hdr(skb);
+ __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
+ int layer4_xor = 0;
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ if (!ip_is_fragment(iph) &&
+ (iph->protocol == IPPROTO_TCP ||
+ iph->protocol == IPPROTO_UDP)) {
+ layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
+ }
+ return (layer4_xor ^
+ ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
+
+ }
+
+ return (data->h_dest[5] ^ data->h_source[5]) % count;
+}
+
+/*
+ * Hash for the output device based upon layer 2 data
+ */
+static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
+{
+ struct ethhdr *data = (struct ethhdr *)skb->data;
+
+ return (data->h_dest[5] ^ data->h_source[5]) % count;
+}
+
+/*-------------------------- Device entry points ----------------------------*/
+
+static void bond_work_init_all(struct bonding *bond)
+{
+ INIT_DELAYED_WORK(&bond->mcast_work,
+ bond_resend_igmp_join_requests_delayed);
+ INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
+ INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
+ INIT_DELAYED_WORK(&bond->arp_work, bond_activebackup_arp_mon);
+ else
+ INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon);
+ INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
+}
+
+static void bond_work_cancel_all(struct bonding *bond)
+{
+ cancel_delayed_work_sync(&bond->mii_work);
+ cancel_delayed_work_sync(&bond->arp_work);
+ cancel_delayed_work_sync(&bond->alb_work);
+ cancel_delayed_work_sync(&bond->ad_work);
+ cancel_delayed_work_sync(&bond->mcast_work);
+}
+
+static int bond_open(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave;
+ int i;
+
+ /* reset slave->backup and slave->inactive */
+ read_lock(&bond->lock);
+ if (bond->slave_cnt > 0) {
+ read_lock(&bond->curr_slave_lock);
+ bond_for_each_slave(bond, slave, i) {
+ if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
+ && (slave != bond->curr_active_slave)) {
+ bond_set_slave_inactive_flags(slave);
+ } else {
+ bond_set_slave_active_flags(slave);
+ }
+ }
+ read_unlock(&bond->curr_slave_lock);
+ }
+ read_unlock(&bond->lock);
+
+ bond_work_init_all(bond);
+
+ if (bond_is_lb(bond)) {
+ /* bond_alb_initialize must be called before the timer
+ * is started.
+ */
+ if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB)))
+ return -ENOMEM;
+ queue_delayed_work(bond->wq, &bond->alb_work, 0);
+ }
+
+ if (bond->params.miimon) /* link check interval, in milliseconds. */
+ queue_delayed_work(bond->wq, &bond->mii_work, 0);
+
+ if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
+ queue_delayed_work(bond->wq, &bond->arp_work, 0);
+ if (bond->params.arp_validate)
+ bond->recv_probe = bond_arp_rcv;
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ queue_delayed_work(bond->wq, &bond->ad_work, 0);
+ /* register to receive LACPDUs */
+ bond->recv_probe = bond_3ad_lacpdu_recv;
+ bond_3ad_initiate_agg_selection(bond, 1);
+ }
+
+ return 0;
+}
+
+static int bond_close(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ write_lock_bh(&bond->lock);
+ bond->send_peer_notif = 0;
+ write_unlock_bh(&bond->lock);
+
+ bond_work_cancel_all(bond);
+ if (bond_is_lb(bond)) {
+ /* Must be called only after all
+ * slaves have been released
+ */
+ bond_alb_deinitialize(bond);
+ }
+ bond->recv_probe = NULL;
+
+ return 0;
+}
+
+static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct rtnl_link_stats64 temp;
+ struct slave *slave;
+ int i;
+
+ memset(stats, 0, sizeof(*stats));
+
+ read_lock_bh(&bond->lock);
+
+ bond_for_each_slave(bond, slave, i) {
+ const struct rtnl_link_stats64 *sstats =
+ dev_get_stats(slave->dev, &temp);
+
+ stats->rx_packets += sstats->rx_packets;
+ stats->rx_bytes += sstats->rx_bytes;
+ stats->rx_errors += sstats->rx_errors;
+ stats->rx_dropped += sstats->rx_dropped;
+
+ stats->tx_packets += sstats->tx_packets;
+ stats->tx_bytes += sstats->tx_bytes;
+ stats->tx_errors += sstats->tx_errors;
+ stats->tx_dropped += sstats->tx_dropped;
+
+ stats->multicast += sstats->multicast;
+ stats->collisions += sstats->collisions;
+
+ stats->rx_length_errors += sstats->rx_length_errors;
+ stats->rx_over_errors += sstats->rx_over_errors;
+ stats->rx_crc_errors += sstats->rx_crc_errors;
+ stats->rx_frame_errors += sstats->rx_frame_errors;
+ stats->rx_fifo_errors += sstats->rx_fifo_errors;
+ stats->rx_missed_errors += sstats->rx_missed_errors;
+
+ stats->tx_aborted_errors += sstats->tx_aborted_errors;
+ stats->tx_carrier_errors += sstats->tx_carrier_errors;
+ stats->tx_fifo_errors += sstats->tx_fifo_errors;
+ stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
+ stats->tx_window_errors += sstats->tx_window_errors;
+ }
+
+ read_unlock_bh(&bond->lock);
+
+ return stats;
+}
+
+static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
+{
+ struct net_device *slave_dev = NULL;
+ struct ifbond k_binfo;
+ struct ifbond __user *u_binfo = NULL;
+ struct ifslave k_sinfo;
+ struct ifslave __user *u_sinfo = NULL;
+ struct mii_ioctl_data *mii = NULL;
+ int res = 0;
+
+ pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ mii = if_mii(ifr);
+ if (!mii)
+ return -EINVAL;
+
+ mii->phy_id = 0;
+ /* Fall Through */
+ case SIOCGMIIREG:
+ /*
+ * We do this again just in case we were called by SIOCGMIIREG
+ * instead of SIOCGMIIPHY.
+ */
+ mii = if_mii(ifr);
+ if (!mii)
+ return -EINVAL;
+
+
+ if (mii->reg_num == 1) {
+ struct bonding *bond = netdev_priv(bond_dev);
+ mii->val_out = 0;
+ read_lock(&bond->lock);
+ read_lock(&bond->curr_slave_lock);
+ if (netif_carrier_ok(bond->dev))
+ mii->val_out = BMSR_LSTATUS;
+
+ read_unlock(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ }
+
+ return 0;
+ case BOND_INFO_QUERY_OLD:
+ case SIOCBONDINFOQUERY:
+ u_binfo = (struct ifbond __user *)ifr->ifr_data;
+
+ if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
+ return -EFAULT;
+
+ res = bond_info_query(bond_dev, &k_binfo);
+ if (res == 0 &&
+ copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
+ return -EFAULT;
+
+ return res;
+ case BOND_SLAVE_INFO_QUERY_OLD:
+ case SIOCBONDSLAVEINFOQUERY:
+ u_sinfo = (struct ifslave __user *)ifr->ifr_data;
+
+ if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
+ return -EFAULT;
+
+ res = bond_slave_info_query(bond_dev, &k_sinfo);
+ if (res == 0 &&
+ copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
+ return -EFAULT;
+
+ return res;
+ default:
+ /* Go on */
+ break;
+ }
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
+
+ pr_debug("slave_dev=%p:\n", slave_dev);
+
+ if (!slave_dev)
+ res = -ENODEV;
+ else {
+ pr_debug("slave_dev->name=%s:\n", slave_dev->name);
+ switch (cmd) {
+ case BOND_ENSLAVE_OLD:
+ case SIOCBONDENSLAVE:
+ res = bond_enslave(bond_dev, slave_dev);
+ break;
+ case BOND_RELEASE_OLD:
+ case SIOCBONDRELEASE:
+ res = bond_release(bond_dev, slave_dev);
+ break;
+ case BOND_SETHWADDR_OLD:
+ case SIOCBONDSETHWADDR:
+ res = bond_sethwaddr(bond_dev, slave_dev);
+ break;
+ case BOND_CHANGE_ACTIVE_OLD:
+ case SIOCBONDCHANGEACTIVE:
+ res = bond_ioctl_change_active(bond_dev, slave_dev);
+ break;
+ default:
+ res = -EOPNOTSUPP;
+ }
+
+ dev_put(slave_dev);
+ }
+
+ return res;
+}
+
+static bool bond_addr_in_mc_list(unsigned char *addr,
+ struct netdev_hw_addr_list *list,
+ int addrlen)
+{
+ struct netdev_hw_addr *ha;
+
+ netdev_hw_addr_list_for_each(ha, list)
+ if (!memcmp(ha->addr, addr, addrlen))
+ return true;
+
+ return false;
+}
+
+static void bond_change_rx_flags(struct net_device *bond_dev, int change)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ if (change & IFF_PROMISC)
+ bond_set_promiscuity(bond,
+ bond_dev->flags & IFF_PROMISC ? 1 : -1);
+
+ if (change & IFF_ALLMULTI)
+ bond_set_allmulti(bond,
+ bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
+}
+
+static void bond_set_multicast_list(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct netdev_hw_addr *ha;
+ bool found;
+
+ read_lock(&bond->lock);
+
+ /* looking for addresses to add to slaves' mc list */
+ netdev_for_each_mc_addr(ha, bond_dev) {
+ found = bond_addr_in_mc_list(ha->addr, &bond->mc_list,
+ bond_dev->addr_len);
+ if (!found)
+ bond_mc_add(bond, ha->addr);
+ }
+
+ /* looking for addresses to delete from slaves' list */
+ netdev_hw_addr_list_for_each(ha, &bond->mc_list) {
+ found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc,
+ bond_dev->addr_len);
+ if (!found)
+ bond_mc_del(bond, ha->addr);
+ }
+
+ /* save master's multicast list */
+ __hw_addr_flush(&bond->mc_list);
+ __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc,
+ bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST);
+
+ read_unlock(&bond->lock);
+}
+
+static int bond_neigh_init(struct neighbour *n)
+{
+ struct bonding *bond = netdev_priv(n->dev);
+ struct slave *slave = bond->first_slave;
+ const struct net_device_ops *slave_ops;
+ struct neigh_parms parms;
+ int ret;
+
+ if (!slave)
+ return 0;
+
+ slave_ops = slave->dev->netdev_ops;
+
+ if (!slave_ops->ndo_neigh_setup)
+ return 0;
+
+ parms.neigh_setup = NULL;
+ parms.neigh_cleanup = NULL;
+ ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
+ if (ret)
+ return ret;
+
+ /*
+ * Assign slave's neigh_cleanup to neighbour in case cleanup is called
+ * after the last slave has been detached. Assumes that all slaves
+ * utilize the same neigh_cleanup (true at this writing as only user
+ * is ipoib).
+ */
+ n->parms->neigh_cleanup = parms.neigh_cleanup;
+
+ if (!parms.neigh_setup)
+ return 0;
+
+ return parms.neigh_setup(n);
+}
+
+/*
+ * The bonding ndo_neigh_setup is called at init time beofre any
+ * slave exists. So we must declare proxy setup function which will
+ * be used at run time to resolve the actual slave neigh param setup.
+ *
+ * It's also called by master devices (such as vlans) to setup their
+ * underlying devices. In that case - do nothing, we're already set up from
+ * our init.
+ */
+static int bond_neigh_setup(struct net_device *dev,
+ struct neigh_parms *parms)
+{
+ /* modify only our neigh_parms */
+ if (parms->dev == dev)
+ parms->neigh_setup = bond_neigh_init;
+
+ return 0;
+}
+
+/*
+ * Change the MTU of all of a master's slaves to match the master
+ */
+static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *stop_at;
+ int res = 0;
+ int i;
+
+ pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
+ (bond_dev ? bond_dev->name : "None"), new_mtu);
+
+ /* Can't hold bond->lock with bh disabled here since
+ * some base drivers panic. On the other hand we can't
+ * hold bond->lock without bh disabled because we'll
+ * deadlock. The only solution is to rely on the fact
+ * that we're under rtnl_lock here, and the slaves
+ * list won't change. This doesn't solve the problem
+ * of setting the slave's MTU while it is
+ * transmitting, but the assumption is that the base
+ * driver can handle that.
+ *
+ * TODO: figure out a way to safely iterate the slaves
+ * list, but without holding a lock around the actual
+ * call to the base driver.
+ */
+
+ bond_for_each_slave(bond, slave, i) {
+ pr_debug("s %p s->p %p c_m %p\n",
+ slave,
+ slave->prev,
+ slave->dev->netdev_ops->ndo_change_mtu);
+
+ res = dev_set_mtu(slave->dev, new_mtu);
+
+ if (res) {
+ /* If we failed to set the slave's mtu to the new value
+ * we must abort the operation even in ACTIVE_BACKUP
+ * mode, because if we allow the backup slaves to have
+ * different mtu values than the active slave we'll
+ * need to change their mtu when doing a failover. That
+ * means changing their mtu from timer context, which
+ * is probably not a good idea.
+ */
+ pr_debug("err %d %s\n", res, slave->dev->name);
+ goto unwind;
+ }
+ }
+
+ bond_dev->mtu = new_mtu;
+
+ return 0;
+
+unwind:
+ /* unwind from head to the slave that failed */
+ stop_at = slave;
+ bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ int tmp_res;
+
+ tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
+ if (tmp_res) {
+ pr_debug("unwind err %d dev %s\n",
+ tmp_res, slave->dev->name);
+ }
+ }
+
+ return res;
+}
+
+/*
+ * Change HW address
+ *
+ * Note that many devices must be down to change the HW address, and
+ * downing the master releases all slaves. We can make bonds full of
+ * bonding devices to test this, however.
+ */
+static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct sockaddr *sa = addr, tmp_sa;
+ struct slave *slave, *stop_at;
+ int res = 0;
+ int i;
+
+ if (bond->params.mode == BOND_MODE_ALB)
+ return bond_alb_set_mac_address(bond_dev, addr);
+
+
+ pr_debug("bond=%p, name=%s\n",
+ bond, bond_dev ? bond_dev->name : "None");
+
+ /*
+ * If fail_over_mac is set to active, do nothing and return
+ * success. Returning an error causes ifenslave to fail.
+ */
+ if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
+ return 0;
+
+ if (!is_valid_ether_addr(sa->sa_data))
+ return -EADDRNOTAVAIL;
+
+ /* Can't hold bond->lock with bh disabled here since
+ * some base drivers panic. On the other hand we can't
+ * hold bond->lock without bh disabled because we'll
+ * deadlock. The only solution is to rely on the fact
+ * that we're under rtnl_lock here, and the slaves
+ * list won't change. This doesn't solve the problem
+ * of setting the slave's hw address while it is
+ * transmitting, but the assumption is that the base
+ * driver can handle that.
+ *
+ * TODO: figure out a way to safely iterate the slaves
+ * list, but without holding a lock around the actual
+ * call to the base driver.
+ */
+
+ bond_for_each_slave(bond, slave, i) {
+ const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
+ pr_debug("slave %p %s\n", slave, slave->dev->name);
+
+ if (slave_ops->ndo_set_mac_address == NULL) {
+ res = -EOPNOTSUPP;
+ pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
+ goto unwind;
+ }
+
+ res = dev_set_mac_address(slave->dev, addr);
+ if (res) {
+ /* TODO: consider downing the slave
+ * and retry ?
+ * User should expect communications
+ * breakage anyway until ARP finish
+ * updating, so...
+ */
+ pr_debug("err %d %s\n", res, slave->dev->name);
+ goto unwind;
+ }
+ }
+
+ /* success */
+ memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
+ return 0;
+
+unwind:
+ memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
+ tmp_sa.sa_family = bond_dev->type;
+
+ /* unwind from head to the slave that failed */
+ stop_at = slave;
+ bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ int tmp_res;
+
+ tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
+ if (tmp_res) {
+ pr_debug("unwind err %d dev %s\n",
+ tmp_res, slave->dev->name);
+ }
+ }
+
+ return res;
+}
+
+static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *start_at;
+ int i, slave_no, res = 1;
+ struct iphdr *iph = ip_hdr(skb);
+
+ /*
+ * Start with the curr_active_slave that joined the bond as the
+ * default for sending IGMP traffic. For failover purposes one
+ * needs to maintain some consistency for the interface that will
+ * send the join/membership reports. The curr_active_slave found
+ * will send all of this type of traffic.
+ */
+ if ((iph->protocol == IPPROTO_IGMP) &&
+ (skb->protocol == htons(ETH_P_IP))) {
+
+ read_lock(&bond->curr_slave_lock);
+ slave = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ if (!slave)
+ goto out;
+ } else {
+ /*
+ * Concurrent TX may collide on rr_tx_counter; we accept
+ * that as being rare enough not to justify using an
+ * atomic op here.
+ */
+ slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
+
+ bond_for_each_slave(bond, slave, i) {
+ slave_no--;
+ if (slave_no < 0)
+ break;
+ }
+ }
+
+ start_at = slave;
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP) &&
+ bond_is_active_slave(slave)) {
+ res = bond_dev_queue_xmit(bond, skb, slave->dev);
+ break;
+ }
+ }
+
+out:
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+
+/*
+ * in active-backup mode, we know that bond->curr_active_slave is always valid if
+ * the bond has a usable interface.
+ */
+static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ int res = 1;
+
+ read_lock(&bond->curr_slave_lock);
+
+ if (bond->curr_active_slave)
+ res = bond_dev_queue_xmit(bond, skb,
+ bond->curr_active_slave->dev);
+
+ if (res)
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+
+ read_unlock(&bond->curr_slave_lock);
+
+ return NETDEV_TX_OK;
+}
+
+/*
+ * In bond_xmit_xor() , we determine the output device by using a pre-
+ * determined xmit_hash_policy(), If the selected device is not enabled,
+ * find the next active slave.
+ */
+static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *start_at;
+ int slave_no;
+ int i;
+ int res = 1;
+
+ slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
+
+ bond_for_each_slave(bond, slave, i) {
+ slave_no--;
+ if (slave_no < 0)
+ break;
+ }
+
+ start_at = slave;
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP) &&
+ bond_is_active_slave(slave)) {
+ res = bond_dev_queue_xmit(bond, skb, slave->dev);
+ break;
+ }
+ }
+
+ if (res) {
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+ }
+
+ return NETDEV_TX_OK;
+}
+
+/*
+ * in broadcast mode, we send everything to all usable interfaces.
+ */
+static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *start_at;
+ struct net_device *tx_dev = NULL;
+ int i;
+ int res = 1;
+
+ read_lock(&bond->curr_slave_lock);
+ start_at = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ if (!start_at)
+ goto out;
+
+ bond_for_each_slave_from(bond, slave, i, start_at) {
+ if (IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP) &&
+ bond_is_active_slave(slave)) {
+ if (tx_dev) {
+ struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
+ if (!skb2) {
+ pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
+ bond_dev->name);
+ continue;
+ }
+
+ res = bond_dev_queue_xmit(bond, skb2, tx_dev);
+ if (res) {
+ dev_kfree_skb(skb2);
+ continue;
+ }
+ }
+ tx_dev = slave->dev;
+ }
+ }
+
+ if (tx_dev)
+ res = bond_dev_queue_xmit(bond, skb, tx_dev);
+
+out:
+ if (res)
+ /* no suitable interface, frame not sent */
+ dev_kfree_skb(skb);
+
+ /* frame sent to all suitable interfaces */
+ return NETDEV_TX_OK;
+}
+
+/*------------------------- Device initialization ---------------------------*/
+
+static void bond_set_xmit_hash_policy(struct bonding *bond)
+{
+ switch (bond->params.xmit_policy) {
+ case BOND_XMIT_POLICY_LAYER23:
+ bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
+ break;
+ case BOND_XMIT_POLICY_LAYER34:
+ bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
+ break;
+ case BOND_XMIT_POLICY_LAYER2:
+ default:
+ bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
+ break;
+ }
+}
+
+/*
+ * Lookup the slave that corresponds to a qid
+ */
+static inline int bond_slave_override(struct bonding *bond,
+ struct sk_buff *skb)
+{
+ int i, res = 1;
+ struct slave *slave = NULL;
+ struct slave *check_slave;
+
+ if (!skb->queue_mapping)
+ return 1;
+
+ /* Find out if any slaves have the same mapping as this skb. */
+ bond_for_each_slave(bond, check_slave, i) {
+ if (check_slave->queue_id == skb->queue_mapping) {
+ slave = check_slave;
+ break;
+ }
+ }
+
+ /* If the slave isn't UP, use default transmit policy. */
+ if (slave && slave->queue_id && IS_UP(slave->dev) &&
+ (slave->link == BOND_LINK_UP)) {
+ res = bond_dev_queue_xmit(bond, skb, slave->dev);
+ }
+
+ return res;
+}
+
+
+static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb)
+{
+ /*
+ * This helper function exists to help dev_pick_tx get the correct
+ * destination queue. Using a helper function skips a call to
+ * skb_tx_hash and will put the skbs in the queue we expect on their
+ * way down to the bonding driver.
+ */
+ u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
+
+ /*
+ * Save the original txq to restore before passing to the driver
+ */
+ qdisc_skb_cb(skb)->bond_queue_mapping = skb->queue_mapping;
+
+ if (unlikely(txq >= dev->real_num_tx_queues)) {
+ do {
+ txq -= dev->real_num_tx_queues;
+ } while (txq >= dev->real_num_tx_queues);
+ }
+ return txq;
+}
+
+static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bonding *bond = netdev_priv(dev);
+
+ if (TX_QUEUE_OVERRIDE(bond->params.mode)) {
+ if (!bond_slave_override(bond, skb))
+ return NETDEV_TX_OK;
+ }
+
+ switch (bond->params.mode) {
+ case BOND_MODE_ROUNDROBIN:
+ return bond_xmit_roundrobin(skb, dev);
+ case BOND_MODE_ACTIVEBACKUP:
+ return bond_xmit_activebackup(skb, dev);
+ case BOND_MODE_XOR:
+ return bond_xmit_xor(skb, dev);
+ case BOND_MODE_BROADCAST:
+ return bond_xmit_broadcast(skb, dev);
+ case BOND_MODE_8023AD:
+ return bond_3ad_xmit_xor(skb, dev);
+ case BOND_MODE_ALB:
+ case BOND_MODE_TLB:
+ return bond_alb_xmit(skb, dev);
+ default:
+ /* Should never happen, mode already checked */
+ pr_err("%s: Error: Unknown bonding mode %d\n",
+ dev->name, bond->params.mode);
+ WARN_ON_ONCE(1);
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+}
+
+static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bonding *bond = netdev_priv(dev);
+ netdev_tx_t ret = NETDEV_TX_OK;
+
+ /*
+ * If we risk deadlock from transmitting this in the
+ * netpoll path, tell netpoll to queue the frame for later tx
+ */
+ if (is_netpoll_tx_blocked(dev))
+ return NETDEV_TX_BUSY;
+
+ read_lock(&bond->lock);
+
+ if (bond->slave_cnt)
+ ret = __bond_start_xmit(skb, dev);
+ else
+ dev_kfree_skb(skb);
+
+ read_unlock(&bond->lock);
+
+ return ret;
+}
+
+/*
+ * set bond mode specific net device operations
+ */
+void bond_set_mode_ops(struct bonding *bond, int mode)
+{
+ struct net_device *bond_dev = bond->dev;
+
+ switch (mode) {
+ case BOND_MODE_ROUNDROBIN:
+ break;
+ case BOND_MODE_ACTIVEBACKUP:
+ break;
+ case BOND_MODE_XOR:
+ bond_set_xmit_hash_policy(bond);
+ break;
+ case BOND_MODE_BROADCAST:
+ break;
+ case BOND_MODE_8023AD:
+ bond_set_xmit_hash_policy(bond);
+ break;
+ case BOND_MODE_ALB:
+ /* FALLTHRU */
+ case BOND_MODE_TLB:
+ break;
+ default:
+ /* Should never happen, mode already checked */
+ pr_err("%s: Error: Unknown bonding mode %d\n",
+ bond_dev->name, mode);
+ break;
+ }
+}
+
+static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strncpy(drvinfo->driver, DRV_NAME, 32);
+ strncpy(drvinfo->version, DRV_VERSION, 32);
+ snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
+}
+
+static const struct ethtool_ops bond_ethtool_ops = {
+ .get_drvinfo = bond_ethtool_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+static const struct net_device_ops bond_netdev_ops = {
+ .ndo_init = bond_init,
+ .ndo_uninit = bond_uninit,
+ .ndo_open = bond_open,
+ .ndo_stop = bond_close,
+ .ndo_start_xmit = bond_start_xmit,
+ .ndo_select_queue = bond_select_queue,
+ .ndo_get_stats64 = bond_get_stats,
+ .ndo_do_ioctl = bond_do_ioctl,
+ .ndo_change_rx_flags = bond_change_rx_flags,
+ .ndo_set_rx_mode = bond_set_multicast_list,
+ .ndo_change_mtu = bond_change_mtu,
+ .ndo_set_mac_address = bond_set_mac_address,
+ .ndo_neigh_setup = bond_neigh_setup,
+ .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_setup = bond_netpoll_setup,
+ .ndo_netpoll_cleanup = bond_netpoll_cleanup,
+ .ndo_poll_controller = bond_poll_controller,
+#endif
+ .ndo_add_slave = bond_enslave,
+ .ndo_del_slave = bond_release,
+ .ndo_fix_features = bond_fix_features,
+};
+
+static void bond_destructor(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ if (bond->wq)
+ destroy_workqueue(bond->wq);
+ free_netdev(bond_dev);
+}
+
+static void bond_setup(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+
+ /* initialize rwlocks */
+ rwlock_init(&bond->lock);
+ rwlock_init(&bond->curr_slave_lock);
+
+ bond->params = bonding_defaults;
+
+ /* Initialize pointers */
+ bond->dev = bond_dev;
+ INIT_LIST_HEAD(&bond->vlan_list);
+
+ /* Initialize the device entry points */
+ ether_setup(bond_dev);
+ bond_dev->netdev_ops = &bond_netdev_ops;
+ bond_dev->ethtool_ops = &bond_ethtool_ops;
+ bond_set_mode_ops(bond, bond->params.mode);
+
+ bond_dev->destructor = bond_destructor;
+
+ /* Initialize the device options */
+ bond_dev->tx_queue_len = 0;
+ bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
+ bond_dev->priv_flags |= IFF_BONDING;
+ bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
+
+ /* At first, we block adding VLANs. That's the only way to
+ * prevent problems that occur when adding VLANs over an
+ * empty bond. The block will be removed once non-challenged
+ * slaves are enslaved.
+ */
+ bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
+
+ /* don't acquire bond device's netif_tx_lock when
+ * transmitting */
+ bond_dev->features |= NETIF_F_LLTX;
+
+ /* By default, we declare the bond to be fully
+ * VLAN hardware accelerated capable. Special
+ * care is taken in the various xmit functions
+ * when there are slaves that are not hw accel
+ * capable
+ */
+
+ bond_dev->hw_features = BOND_VLAN_FEATURES |
+ NETIF_F_HW_VLAN_TX |
+ NETIF_F_HW_VLAN_RX |
+ NETIF_F_HW_VLAN_FILTER;
+
+ bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
+ bond_dev->features |= bond_dev->hw_features;
+}
+
+/*
+* Destroy a bonding device.
+* Must be under rtnl_lock when this function is called.
+*/
+static void bond_uninit(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct vlan_entry *vlan, *tmp;
+
+ bond_netpoll_cleanup(bond_dev);
+
+ /* Release the bonded slaves */
+ bond_release_all(bond_dev);
+
+ list_del(&bond->bond_list);
+
+ bond_work_cancel_all(bond);
+
+ bond_debug_unregister(bond);
+
+ __hw_addr_flush(&bond->mc_list);
+
+ list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
+ list_del(&vlan->vlan_list);
+ kfree(vlan);
+ }
+}
+
+/*------------------------- Module initialization ---------------------------*/
+
+/*
+ * Convert string input module parms. Accept either the
+ * number of the mode or its string name. A bit complicated because
+ * some mode names are substrings of other names, and calls from sysfs
+ * may have whitespace in the name (trailing newlines, for example).
+ */
+int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
+{
+ int modeint = -1, i, rv;
+ char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
+
+ for (p = (char *)buf; *p; p++)
+ if (!(isdigit(*p) || isspace(*p)))
+ break;
+
+ if (*p)
+ rv = sscanf(buf, "%20s", modestr);
+ else
+ rv = sscanf(buf, "%d", &modeint);
+
+ if (!rv)
+ return -1;
+
+ for (i = 0; tbl[i].modename; i++) {
+ if (modeint == tbl[i].mode)
+ return tbl[i].mode;
+ if (strcmp(modestr, tbl[i].modename) == 0)
+ return tbl[i].mode;
+ }
+
+ return -1;
+}
+
+static int bond_check_params(struct bond_params *params)
+{
+ int arp_validate_value, fail_over_mac_value, primary_reselect_value;
+
+ /*
+ * Convert string parameters.
+ */
+ if (mode) {
+ bond_mode = bond_parse_parm(mode, bond_mode_tbl);
+ if (bond_mode == -1) {
+ pr_err("Error: Invalid bonding mode \"%s\"\n",
+ mode == NULL ? "NULL" : mode);
+ return -EINVAL;
+ }
+ }
+
+ if (xmit_hash_policy) {
+ if ((bond_mode != BOND_MODE_XOR) &&
+ (bond_mode != BOND_MODE_8023AD)) {
+ pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
+ bond_mode_name(bond_mode));
+ } else {
+ xmit_hashtype = bond_parse_parm(xmit_hash_policy,
+ xmit_hashtype_tbl);
+ if (xmit_hashtype == -1) {
+ pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
+ xmit_hash_policy == NULL ? "NULL" :
+ xmit_hash_policy);
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (lacp_rate) {
+ if (bond_mode != BOND_MODE_8023AD) {
+ pr_info("lacp_rate param is irrelevant in mode %s\n",
+ bond_mode_name(bond_mode));
+ } else {
+ lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
+ if (lacp_fast == -1) {
+ pr_err("Error: Invalid lacp rate \"%s\"\n",
+ lacp_rate == NULL ? "NULL" : lacp_rate);
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (ad_select) {
+ params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
+ if (params->ad_select == -1) {
+ pr_err("Error: Invalid ad_select \"%s\"\n",
+ ad_select == NULL ? "NULL" : ad_select);
+ return -EINVAL;
+ }
+
+ if (bond_mode != BOND_MODE_8023AD) {
+ pr_warning("ad_select param only affects 802.3ad mode\n");
+ }
+ } else {
+ params->ad_select = BOND_AD_STABLE;
+ }
+
+ if (max_bonds < 0) {
+ pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
+ max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
+ max_bonds = BOND_DEFAULT_MAX_BONDS;
+ }
+
+ if (miimon < 0) {
+ pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
+ miimon, INT_MAX, BOND_LINK_MON_INTERV);
+ miimon = BOND_LINK_MON_INTERV;
+ }
+
+ if (updelay < 0) {
+ pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+ updelay, INT_MAX);
+ updelay = 0;
+ }
+
+ if (downdelay < 0) {
+ pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
+ downdelay, INT_MAX);
+ downdelay = 0;
+ }
+
+ if ((use_carrier != 0) && (use_carrier != 1)) {
+ pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
+ use_carrier);
+ use_carrier = 1;
+ }
+
+ if (num_peer_notif < 0 || num_peer_notif > 255) {
+ pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
+ num_peer_notif);
+ num_peer_notif = 1;
+ }
+
+ /* reset values for 802.3ad */
+ if (bond_mode == BOND_MODE_8023AD) {
+ if (!miimon) {
+ pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
+ pr_warning("Forcing miimon to 100msec\n");
+ miimon = 100;
+ }
+ }
+
+ if (tx_queues < 1 || tx_queues > 255) {
+ pr_warning("Warning: tx_queues (%d) should be between "
+ "1 and 255, resetting to %d\n",
+ tx_queues, BOND_DEFAULT_TX_QUEUES);
+ tx_queues = BOND_DEFAULT_TX_QUEUES;
+ }
+
+ if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
+ pr_warning("Warning: all_slaves_active module parameter (%d), "
+ "not of valid value (0/1), so it was set to "
+ "0\n", all_slaves_active);
+ all_slaves_active = 0;
+ }
+
+ if (resend_igmp < 0 || resend_igmp > 255) {
+ pr_warning("Warning: resend_igmp (%d) should be between "
+ "0 and 255, resetting to %d\n",
+ resend_igmp, BOND_DEFAULT_RESEND_IGMP);
+ resend_igmp = BOND_DEFAULT_RESEND_IGMP;
+ }
+
+ /* reset values for TLB/ALB */
+ if ((bond_mode == BOND_MODE_TLB) ||
+ (bond_mode == BOND_MODE_ALB)) {
+ if (!miimon) {
+ pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
+ pr_warning("Forcing miimon to 100msec\n");
+ miimon = 100;
+ }
+ }
+
+ if (bond_mode == BOND_MODE_ALB) {
+ pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
+ updelay);
+ }
+
+ if (!miimon) {
+ if (updelay || downdelay) {
+ /* just warn the user the up/down delay will have
+ * no effect since miimon is zero...
+ */
+ pr_warning("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
+ updelay, downdelay);
+ }
+ } else {
+ /* don't allow arp monitoring */
+ if (arp_interval) {
+ pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
+ miimon, arp_interval);
+ arp_interval = 0;
+ }
+
+ if ((updelay % miimon) != 0) {
+ pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
+ updelay, miimon,
+ (updelay / miimon) * miimon);
+ }
+
+ updelay /= miimon;
+
+ if ((downdelay % miimon) != 0) {
+ pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
+ downdelay, miimon,
+ (downdelay / miimon) * miimon);
+ }
+
+ downdelay /= miimon;
+ }
+
+ if (arp_interval < 0) {
+ pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
+ arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
+ arp_interval = BOND_LINK_ARP_INTERV;
+ }
+
+ for (arp_ip_count = 0;
+ (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
+ arp_ip_count++) {
+ /* not complete check, but should be good enough to
+ catch mistakes */
+ if (!isdigit(arp_ip_target[arp_ip_count][0])) {
+ pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
+ arp_ip_target[arp_ip_count]);
+ arp_interval = 0;
+ } else {
+ __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
+ arp_target[arp_ip_count] = ip;
+ }
+ }
+
+ if (arp_interval && !arp_ip_count) {
+ /* don't allow arping if no arp_ip_target given... */
+ pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
+ arp_interval);
+ arp_interval = 0;
+ }
+
+ if (arp_validate) {
+ if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
+ pr_err("arp_validate only supported in active-backup mode\n");
+ return -EINVAL;
+ }
+ if (!arp_interval) {
+ pr_err("arp_validate requires arp_interval\n");
+ return -EINVAL;
+ }
+
+ arp_validate_value = bond_parse_parm(arp_validate,
+ arp_validate_tbl);
+ if (arp_validate_value == -1) {
+ pr_err("Error: invalid arp_validate \"%s\"\n",
+ arp_validate == NULL ? "NULL" : arp_validate);
+ return -EINVAL;
+ }
+ } else
+ arp_validate_value = 0;
+
+ if (miimon) {
+ pr_info("MII link monitoring set to %d ms\n", miimon);
+ } else if (arp_interval) {
+ int i;
+
+ pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
+ arp_interval,
+ arp_validate_tbl[arp_validate_value].modename,
+ arp_ip_count);
+
+ for (i = 0; i < arp_ip_count; i++)
+ pr_info(" %s", arp_ip_target[i]);
+
+ pr_info("\n");
+
+ } else if (max_bonds) {
+ /* miimon and arp_interval not set, we need one so things
+ * work as expected, see bonding.txt for details
+ */
+ pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
+ }
+
+ if (primary && !USES_PRIMARY(bond_mode)) {
+ /* currently, using a primary only makes sense
+ * in active backup, TLB or ALB modes
+ */
+ pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
+ primary, bond_mode_name(bond_mode));
+ primary = NULL;
+ }
+
+ if (primary && primary_reselect) {
+ primary_reselect_value = bond_parse_parm(primary_reselect,
+ pri_reselect_tbl);
+ if (primary_reselect_value == -1) {
+ pr_err("Error: Invalid primary_reselect \"%s\"\n",
+ primary_reselect ==
+ NULL ? "NULL" : primary_reselect);
+ return -EINVAL;
+ }
+ } else {
+ primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
+ }
+
+ if (fail_over_mac) {
+ fail_over_mac_value = bond_parse_parm(fail_over_mac,
+ fail_over_mac_tbl);
+ if (fail_over_mac_value == -1) {
+ pr_err("Error: invalid fail_over_mac \"%s\"\n",
+ arp_validate == NULL ? "NULL" : arp_validate);
+ return -EINVAL;
+ }
+
+ if (bond_mode != BOND_MODE_ACTIVEBACKUP)
+ pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
+ } else {
+ fail_over_mac_value = BOND_FOM_NONE;
+ }
+
+ /* fill params struct with the proper values */
+ params->mode = bond_mode;
+ params->xmit_policy = xmit_hashtype;
+ params->miimon = miimon;
+ params->num_peer_notif = num_peer_notif;
+ params->arp_interval = arp_interval;
+ params->arp_validate = arp_validate_value;
+ params->updelay = updelay;
+ params->downdelay = downdelay;
+ params->use_carrier = use_carrier;
+ params->lacp_fast = lacp_fast;
+ params->primary[0] = 0;
+ params->primary_reselect = primary_reselect_value;
+ params->fail_over_mac = fail_over_mac_value;
+ params->tx_queues = tx_queues;
+ params->all_slaves_active = all_slaves_active;
+ params->resend_igmp = resend_igmp;
+ params->min_links = min_links;
+
+ if (primary) {
+ strncpy(params->primary, primary, IFNAMSIZ);
+ params->primary[IFNAMSIZ - 1] = 0;
+ }
+
+ memcpy(params->arp_targets, arp_target, sizeof(arp_target));
+
+ return 0;
+}
+
+static struct lock_class_key bonding_netdev_xmit_lock_key;
+static struct lock_class_key bonding_netdev_addr_lock_key;
+
+static void bond_set_lockdep_class_one(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->_xmit_lock,
+ &bonding_netdev_xmit_lock_key);
+}
+
+static void bond_set_lockdep_class(struct net_device *dev)
+{
+ lockdep_set_class(&dev->addr_list_lock,
+ &bonding_netdev_addr_lock_key);
+ netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
+}
+
+/*
+ * Called from registration process
+ */
+static int bond_init(struct net_device *bond_dev)
+{
+ struct bonding *bond = netdev_priv(bond_dev);
+ struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+ struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+
+ pr_debug("Begin bond_init for %s\n", bond_dev->name);
+
+ /*
+ * Initialize locks that may be required during
+ * en/deslave operations. All of the bond_open work
+ * (of which this is part) should really be moved to
+ * a phase prior to dev_open
+ */
+ spin_lock_init(&(bond_info->tx_hashtbl_lock));
+ spin_lock_init(&(bond_info->rx_hashtbl_lock));
+
+ bond->wq = create_singlethread_workqueue(bond_dev->name);
+ if (!bond->wq)
+ return -ENOMEM;
+
+ bond_set_lockdep_class(bond_dev);
+
+ list_add_tail(&bond->bond_list, &bn->dev_list);
+
+ bond_prepare_sysfs_group(bond);
+
+ bond_debug_register(bond);
+
+ __hw_addr_init(&bond->mc_list);
+ return 0;
+}
+
+static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+ return 0;
+}
+
+static int bond_get_tx_queues(struct net *net, struct nlattr *tb[],
+ unsigned int *num_queues,
+ unsigned int *real_num_queues)
+{
+ *num_queues = tx_queues;
+ return 0;
+}
+
+static struct rtnl_link_ops bond_link_ops __read_mostly = {
+ .kind = "bond",
+ .priv_size = sizeof(struct bonding),
+ .setup = bond_setup,
+ .validate = bond_validate,
+ .get_tx_queues = bond_get_tx_queues,
+};
+
+/* Create a new bond based on the specified name and bonding parameters.
+ * If name is NULL, obtain a suitable "bond%d" name for us.
+ * Caller must NOT hold rtnl_lock; we need to release it here before we
+ * set up our sysfs entries.
+ */
+int bond_create(struct net *net, const char *name)
+{
+ struct net_device *bond_dev;
+ int res;
+
+ rtnl_lock();
+
+ bond_dev = alloc_netdev_mq(sizeof(struct bonding),
+ name ? name : "bond%d",
+ bond_setup, tx_queues);
+ if (!bond_dev) {
+ pr_err("%s: eek! can't alloc netdev!\n", name);
+ rtnl_unlock();
+ return -ENOMEM;
+ }
+
+ dev_net_set(bond_dev, net);
+ bond_dev->rtnl_link_ops = &bond_link_ops;
+
+ res = register_netdevice(bond_dev);
+
+ netif_carrier_off(bond_dev);
+
+ rtnl_unlock();
+ if (res < 0)
+ bond_destructor(bond_dev);
+ return res;
+}
+
+static int __net_init bond_net_init(struct net *net)
+{
+ struct bond_net *bn = net_generic(net, bond_net_id);
+
+ bn->net = net;
+ INIT_LIST_HEAD(&bn->dev_list);
+
+ bond_create_proc_dir(bn);
+ bond_create_sysfs(bn);
+
+ return 0;
+}
+
+static void __net_exit bond_net_exit(struct net *net)
+{
+ struct bond_net *bn = net_generic(net, bond_net_id);
+ struct bonding *bond, *tmp_bond;
+ LIST_HEAD(list);
+
+ bond_destroy_sysfs(bn);
+ bond_destroy_proc_dir(bn);
+
+ /* Kill off any bonds created after unregistering bond rtnl ops */
+ rtnl_lock();
+ list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list)
+ unregister_netdevice_queue(bond->dev, &list);
+ unregister_netdevice_many(&list);
+ rtnl_unlock();
+}
+
+static struct pernet_operations bond_net_ops = {
+ .init = bond_net_init,
+ .exit = bond_net_exit,
+ .id = &bond_net_id,
+ .size = sizeof(struct bond_net),
+};
+
+static int __init bonding_init(void)
+{
+ int i;
+ int res;
+
+ pr_info("%s", bond_version);
+
+ res = bond_check_params(&bonding_defaults);
+ if (res)
+ goto out;
+
+ res = register_pernet_subsys(&bond_net_ops);
+ if (res)
+ goto out;
+
+ res = rtnl_link_register(&bond_link_ops);
+ if (res)
+ goto err_link;
+
+ bond_create_debugfs();
+
+ for (i = 0; i < max_bonds; i++) {
+ res = bond_create(&init_net, NULL);
+ if (res)
+ goto err;
+ }
+
+ register_netdevice_notifier(&bond_netdev_notifier);
+out:
+ return res;
+err:
+ bond_destroy_debugfs();
+ rtnl_link_unregister(&bond_link_ops);
+err_link:
+ unregister_pernet_subsys(&bond_net_ops);
+ goto out;
+
+}
+
+static void __exit bonding_exit(void)
+{
+ unregister_netdevice_notifier(&bond_netdev_notifier);
+
+ bond_destroy_debugfs();
+
+ rtnl_link_unregister(&bond_link_ops);
+ unregister_pernet_subsys(&bond_net_ops);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ /*
+ * Make sure we don't have an imbalance on our netpoll blocking
+ */
+ WARN_ON(atomic_read(&netpoll_block_tx));
+#endif
+}
+
+module_init(bonding_init);
+module_exit(bonding_exit);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
+MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
+MODULE_ALIAS_RTNL_LINK("bond");
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_procfs.c b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_procfs.c
new file mode 100644
index 0000000..ad284ba
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_procfs.c
@@ -0,0 +1,283 @@
+#include <linux/proc_fs.h>
+#include <linux/export.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include "bonding.h"
+
+
+static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(RCU)
+ __acquires(&bond->lock)
+{
+ struct bonding *bond = seq->private;
+ loff_t off = 0;
+ struct slave *slave;
+ int i;
+
+ /* make sure the bond won't be taken away */
+ rcu_read_lock();
+ read_lock(&bond->lock);
+
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ bond_for_each_slave(bond, slave, i) {
+ if (++off == *pos)
+ return slave;
+ }
+
+ return NULL;
+}
+
+static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct bonding *bond = seq->private;
+ struct slave *slave = v;
+
+ ++*pos;
+ if (v == SEQ_START_TOKEN)
+ return bond->first_slave;
+
+ slave = slave->next;
+
+ return (slave == bond->first_slave) ? NULL : slave;
+}
+
+static void bond_info_seq_stop(struct seq_file *seq, void *v)
+ __releases(&bond->lock)
+ __releases(RCU)
+{
+ struct bonding *bond = seq->private;
+
+ read_unlock(&bond->lock);
+ rcu_read_unlock();
+}
+
+static void bond_info_show_master(struct seq_file *seq)
+{
+ struct bonding *bond = seq->private;
+ struct slave *curr;
+ int i;
+
+ read_lock(&bond->curr_slave_lock);
+ curr = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ seq_printf(seq, "Bonding Mode: %s",
+ bond_mode_name(bond->params.mode));
+
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
+ bond->params.fail_over_mac)
+ seq_printf(seq, " (fail_over_mac %s)",
+ fail_over_mac_tbl[bond->params.fail_over_mac].modename);
+
+ seq_printf(seq, "\n");
+
+ if (bond->params.mode == BOND_MODE_XOR ||
+ bond->params.mode == BOND_MODE_8023AD) {
+ seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
+ xmit_hashtype_tbl[bond->params.xmit_policy].modename,
+ bond->params.xmit_policy);
+ }
+
+ if (USES_PRIMARY(bond->params.mode)) {
+ seq_printf(seq, "Primary Slave: %s",
+ (bond->primary_slave) ?
+ bond->primary_slave->dev->name : "None");
+ if (bond->primary_slave)
+ seq_printf(seq, " (primary_reselect %s)",
+ pri_reselect_tbl[bond->params.primary_reselect].modename);
+
+ seq_printf(seq, "\nCurrently Active Slave: %s\n",
+ (curr) ? curr->dev->name : "None");
+ }
+
+ seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
+ "up" : "down");
+ seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
+ seq_printf(seq, "Up Delay (ms): %d\n",
+ bond->params.updelay * bond->params.miimon);
+ seq_printf(seq, "Down Delay (ms): %d\n",
+ bond->params.downdelay * bond->params.miimon);
+
+
+ /* ARP information */
+ if (bond->params.arp_interval > 0) {
+ int printed = 0;
+ seq_printf(seq, "ARP Polling Interval (ms): %d\n",
+ bond->params.arp_interval);
+
+ seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
+
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
+ if (!bond->params.arp_targets[i])
+ break;
+ if (printed)
+ seq_printf(seq, ",");
+ seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
+ printed = 1;
+ }
+ seq_printf(seq, "\n");
+ }
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+
+ seq_puts(seq, "\n802.3ad info\n");
+ seq_printf(seq, "LACP rate: %s\n",
+ (bond->params.lacp_fast) ? "fast" : "slow");
+ seq_printf(seq, "Min links: %d\n", bond->params.min_links);
+ seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
+ ad_select_tbl[bond->params.ad_select].modename);
+
+ if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
+ seq_printf(seq, "bond %s has no active aggregator\n",
+ bond->dev->name);
+ } else {
+ seq_printf(seq, "Active Aggregator Info:\n");
+
+ seq_printf(seq, "\tAggregator ID: %d\n",
+ ad_info.aggregator_id);
+ seq_printf(seq, "\tNumber of ports: %d\n",
+ ad_info.ports);
+ seq_printf(seq, "\tActor Key: %d\n",
+ ad_info.actor_key);
+ seq_printf(seq, "\tPartner Key: %d\n",
+ ad_info.partner_key);
+ seq_printf(seq, "\tPartner Mac Address: %pM\n",
+ ad_info.partner_system);
+ }
+ }
+}
+
+static void bond_info_show_slave(struct seq_file *seq,
+ const struct slave *slave)
+{
+ struct bonding *bond = seq->private;
+
+ seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
+ seq_printf(seq, "MII Status: %s\n",
+ (slave->link == BOND_LINK_UP) ? "up" : "down");
+ if (slave->speed == SPEED_UNKNOWN)
+ seq_printf(seq, "Speed: %s\n", "Unknown");
+ else
+ seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
+
+ if (slave->duplex == DUPLEX_UNKNOWN)
+ seq_printf(seq, "Duplex: %s\n", "Unknown");
+ else
+ seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
+
+ seq_printf(seq, "Link Failure Count: %u\n",
+ slave->link_failure_count);
+
+ seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ const struct aggregator *agg
+ = SLAVE_AD_INFO(slave).port.aggregator;
+
+ if (agg)
+ seq_printf(seq, "Aggregator ID: %d\n",
+ agg->aggregator_identifier);
+ else
+ seq_puts(seq, "Aggregator ID: N/A\n");
+ }
+ seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
+}
+
+static int bond_info_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq, "%s\n", bond_version);
+ bond_info_show_master(seq);
+ } else
+ bond_info_show_slave(seq, v);
+
+ return 0;
+}
+
+static const struct seq_operations bond_info_seq_ops = {
+ .start = bond_info_seq_start,
+ .next = bond_info_seq_next,
+ .stop = bond_info_seq_stop,
+ .show = bond_info_seq_show,
+};
+
+static int bond_info_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct proc_dir_entry *proc;
+ int res;
+
+ res = seq_open(file, &bond_info_seq_ops);
+ if (!res) {
+ /* recover the pointer buried in proc_dir_entry data */
+ seq = file->private_data;
+ proc = PDE(inode);
+ seq->private = proc->data;
+ }
+
+ return res;
+}
+
+static const struct file_operations bond_info_fops = {
+ .owner = THIS_MODULE,
+ .open = bond_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+void bond_create_proc_entry(struct bonding *bond)
+{
+ struct net_device *bond_dev = bond->dev;
+ struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+ if (bn->proc_dir) {
+ bond->proc_entry = proc_create_data(bond_dev->name,
+ S_IRUGO, bn->proc_dir,
+ &bond_info_fops, bond);
+ if (bond->proc_entry == NULL)
+ pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
+ DRV_NAME, bond_dev->name);
+ else
+ memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
+ }
+}
+
+void bond_remove_proc_entry(struct bonding *bond)
+{
+ struct net_device *bond_dev = bond->dev;
+ struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
+
+ if (bn->proc_dir && bond->proc_entry) {
+ remove_proc_entry(bond->proc_file_name, bn->proc_dir);
+ memset(bond->proc_file_name, 0, IFNAMSIZ);
+ bond->proc_entry = NULL;
+ }
+}
+
+/* Create the bonding directory under /proc/net, if doesn't exist yet.
+ * Caller must hold rtnl_lock.
+ */
+void __net_init bond_create_proc_dir(struct bond_net *bn)
+{
+ if (!bn->proc_dir) {
+ bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
+ if (!bn->proc_dir)
+ pr_warning("Warning: cannot create /proc/net/%s\n",
+ DRV_NAME);
+ }
+}
+
+/* Destroy the bonding directory under /proc/net, if empty.
+ * Caller must hold rtnl_lock.
+ */
+void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
+{
+ if (bn->proc_dir) {
+ remove_proc_entry(DRV_NAME, bn->net->proc_net);
+ bn->proc_dir = NULL;
+ }
+}
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_sysfs.c b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_sysfs.c
new file mode 100644
index 0000000..f42a00a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bond_sysfs.c
@@ -0,0 +1,1731 @@
+/*
+ * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/in.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+#include <linux/inet.h>
+#include <linux/rtnetlink.h>
+#include <linux/etherdevice.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <linux/nsproxy.h>
+
+#include "bonding.h"
+
+#define to_dev(obj) container_of(obj, struct device, kobj)
+#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
+
+/*
+ * "show" function for the bond_masters attribute.
+ * The class parameter is ignored.
+ */
+static ssize_t bonding_show_bonds(struct class *cls,
+ struct class_attribute *attr,
+ char *buf)
+{
+ struct bond_net *bn =
+ container_of(attr, struct bond_net, class_attr_bonding_masters);
+ int res = 0;
+ struct bonding *bond;
+
+ rtnl_lock();
+
+ list_for_each_entry(bond, &bn->dev_list, bond_list) {
+ if (res > (PAGE_SIZE - IFNAMSIZ)) {
+ /* not enough space for another interface name */
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s ", bond->dev->name);
+ }
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+
+ rtnl_unlock();
+ return res;
+}
+
+static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
+{
+ struct bonding *bond;
+
+ list_for_each_entry(bond, &bn->dev_list, bond_list) {
+ if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
+ return bond->dev;
+ }
+ return NULL;
+}
+
+/*
+ * "store" function for the bond_masters attribute. This is what
+ * creates and deletes entire bonds.
+ *
+ * The class parameter is ignored.
+ *
+ */
+
+static ssize_t bonding_store_bonds(struct class *cls,
+ struct class_attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct bond_net *bn =
+ container_of(attr, struct bond_net, class_attr_bonding_masters);
+ char command[IFNAMSIZ + 1] = {0, };
+ char *ifname;
+ int rv, res = count;
+
+ sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
+ ifname = command + 1;
+ if ((strlen(command) <= 1) ||
+ !dev_valid_name(ifname))
+ goto err_no_cmd;
+
+ if (command[0] == '+') {
+ pr_info("%s is being created...\n", ifname);
+ rv = bond_create(bn->net, ifname);
+ if (rv) {
+ if (rv == -EEXIST)
+ pr_info("%s already exists.\n", ifname);
+ else
+ pr_info("%s creation failed.\n", ifname);
+ res = rv;
+ }
+ } else if (command[0] == '-') {
+ struct net_device *bond_dev;
+
+ rtnl_lock();
+ bond_dev = bond_get_by_name(bn, ifname);
+ if (bond_dev) {
+ pr_info("%s is being deleted...\n", ifname);
+ unregister_netdevice(bond_dev);
+ } else {
+ pr_err("unable to delete non-existent %s\n", ifname);
+ res = -ENODEV;
+ }
+ rtnl_unlock();
+ } else
+ goto err_no_cmd;
+
+ /* Always return either count or an error. If you return 0, you'll
+ * get called forever, which is bad.
+ */
+ return res;
+
+err_no_cmd:
+ pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
+ return -EPERM;
+}
+
+static const void *bonding_namespace(struct class *cls,
+ const struct class_attribute *attr)
+{
+ const struct bond_net *bn =
+ container_of(attr, struct bond_net, class_attr_bonding_masters);
+ return bn->net;
+}
+
+/* class attribute for bond_masters file. This ends up in /sys/class/net */
+static const struct class_attribute class_attr_bonding_masters = {
+ .attr = {
+ .name = "bonding_masters",
+ .mode = S_IWUSR | S_IRUGO,
+ },
+ .show = bonding_show_bonds,
+ .store = bonding_store_bonds,
+ .namespace = bonding_namespace,
+};
+
+int bond_create_slave_symlinks(struct net_device *master,
+ struct net_device *slave)
+{
+ char linkname[IFNAMSIZ+7];
+ int ret = 0;
+
+ /* first, create a link from the slave back to the master */
+ ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
+ "master");
+ if (ret)
+ return ret;
+ /* next, create a link from the master to the slave */
+ sprintf(linkname, "slave_%s", slave->name);
+ ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
+ linkname);
+
+ /* free the master link created earlier in case of error */
+ if (ret)
+ sysfs_remove_link(&(slave->dev.kobj), "master");
+
+ return ret;
+
+}
+
+void bond_destroy_slave_symlinks(struct net_device *master,
+ struct net_device *slave)
+{
+ char linkname[IFNAMSIZ+7];
+
+ sysfs_remove_link(&(slave->dev.kobj), "master");
+ sprintf(linkname, "slave_%s", slave->name);
+ sysfs_remove_link(&(master->dev.kobj), linkname);
+}
+
+
+/*
+ * Show the slaves in the current bond.
+ */
+static ssize_t bonding_show_slaves(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct slave *slave;
+ int i, res = 0;
+ struct bonding *bond = to_bond(d);
+
+ read_lock(&bond->lock);
+ bond_for_each_slave(bond, slave, i) {
+ if (res > (PAGE_SIZE - IFNAMSIZ)) {
+ /* not enough space for another interface name */
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s ", slave->dev->name);
+ }
+ read_unlock(&bond->lock);
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+ return res;
+}
+
+/*
+ * Set the slaves in the current bond. The bond interface must be
+ * up for this to succeed.
+ * This is supposed to be only thin wrapper for bond_enslave and bond_release.
+ * All hard work should be done there.
+ */
+static ssize_t bonding_store_slaves(struct device *d,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ char command[IFNAMSIZ + 1] = { 0, };
+ char *ifname;
+ int res, ret = count;
+ struct net_device *dev;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
+ ifname = command + 1;
+ if ((strlen(command) <= 1) ||
+ !dev_valid_name(ifname))
+ goto err_no_cmd;
+
+ dev = __dev_get_by_name(dev_net(bond->dev), ifname);
+ if (!dev) {
+ pr_info("%s: Interface %s does not exist!\n",
+ bond->dev->name, ifname);
+ ret = -ENODEV;
+ goto out;
+ }
+
+ switch (command[0]) {
+ case '+':
+ pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
+ res = bond_enslave(bond->dev, dev);
+ break;
+
+ case '-':
+ pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
+ res = bond_release(bond->dev, dev);
+ break;
+
+ default:
+ goto err_no_cmd;
+ }
+
+ if (res)
+ ret = res;
+ goto out;
+
+err_no_cmd:
+ pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
+ bond->dev->name);
+ ret = -EPERM;
+
+out:
+ rtnl_unlock();
+ return ret;
+}
+
+static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
+ bonding_store_slaves);
+
+/*
+ * Show and set the bonding mode. The bond interface must be down to
+ * change the mode.
+ */
+static ssize_t bonding_show_mode(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ bond_mode_tbl[bond->params.mode].modename,
+ bond->params.mode);
+}
+
+static ssize_t bonding_store_mode(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->dev->flags & IFF_UP) {
+ pr_err("unable to update mode of %s because interface is up.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (bond->slave_cnt > 0) {
+ pr_err("unable to update mode of %s because it has slaves.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ new_value = bond_parse_parm(buf, bond_mode_tbl);
+ if (new_value < 0) {
+ pr_err("%s: Ignoring invalid mode value %.*s.\n",
+ bond->dev->name, (int)strlen(buf) - 1, buf);
+ ret = -EINVAL;
+ goto out;
+ }
+ if ((new_value == BOND_MODE_ALB ||
+ new_value == BOND_MODE_TLB) &&
+ bond->params.arp_interval) {
+ pr_err("%s: %s mode is incompatible with arp monitoring.\n",
+ bond->dev->name, bond_mode_tbl[new_value].modename);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ bond->params.mode = new_value;
+ bond_set_mode_ops(bond, bond->params.mode);
+ pr_info("%s: setting mode to %s (%d).\n",
+ bond->dev->name, bond_mode_tbl[new_value].modename,
+ new_value);
+out:
+ return ret;
+}
+static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
+ bonding_show_mode, bonding_store_mode);
+
+/*
+ * Show and set the bonding transmit hash method.
+ * The bond interface must be down to change the xmit hash policy.
+ */
+static ssize_t bonding_show_xmit_hash(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ xmit_hashtype_tbl[bond->params.xmit_policy].modename,
+ bond->params.xmit_policy);
+}
+
+static ssize_t bonding_store_xmit_hash(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->dev->flags & IFF_UP) {
+ pr_err("%s: Interface is up. Unable to update xmit policy.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
+ if (new_value < 0) {
+ pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
+ bond->dev->name,
+ (int)strlen(buf) - 1, buf);
+ ret = -EINVAL;
+ goto out;
+ } else {
+ bond->params.xmit_policy = new_value;
+ bond_set_mode_ops(bond, bond->params.mode);
+ pr_info("%s: setting xmit hash policy to %s (%d).\n",
+ bond->dev->name,
+ xmit_hashtype_tbl[new_value].modename, new_value);
+ }
+out:
+ return ret;
+}
+static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
+ bonding_show_xmit_hash, bonding_store_xmit_hash);
+
+/*
+ * Show and set arp_validate.
+ */
+static ssize_t bonding_show_arp_validate(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ arp_validate_tbl[bond->params.arp_validate].modename,
+ bond->params.arp_validate);
+}
+
+static ssize_t bonding_store_arp_validate(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value;
+ struct bonding *bond = to_bond(d);
+
+ new_value = bond_parse_parm(buf, arp_validate_tbl);
+ if (new_value < 0) {
+ pr_err("%s: Ignoring invalid arp_validate value %s\n",
+ bond->dev->name, buf);
+ return -EINVAL;
+ }
+ if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
+ pr_err("%s: arp_validate only supported in active-backup mode.\n",
+ bond->dev->name);
+ return -EINVAL;
+ }
+ pr_info("%s: setting arp_validate to %s (%d).\n",
+ bond->dev->name, arp_validate_tbl[new_value].modename,
+ new_value);
+
+ bond->params.arp_validate = new_value;
+
+ return count;
+}
+
+static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
+ bonding_store_arp_validate);
+
+/*
+ * Show and store fail_over_mac. User only allowed to change the
+ * value when there are no slaves.
+ */
+static ssize_t bonding_show_fail_over_mac(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ fail_over_mac_tbl[bond->params.fail_over_mac].modename,
+ bond->params.fail_over_mac);
+}
+
+static ssize_t bonding_store_fail_over_mac(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->slave_cnt != 0) {
+ pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
+ bond->dev->name);
+ return -EPERM;
+ }
+
+ new_value = bond_parse_parm(buf, fail_over_mac_tbl);
+ if (new_value < 0) {
+ pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
+ bond->dev->name, buf);
+ return -EINVAL;
+ }
+
+ bond->params.fail_over_mac = new_value;
+ pr_info("%s: Setting fail_over_mac to %s (%d).\n",
+ bond->dev->name, fail_over_mac_tbl[new_value].modename,
+ new_value);
+
+ return count;
+}
+
+static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
+ bonding_show_fail_over_mac, bonding_store_fail_over_mac);
+
+/*
+ * Show and set the arp timer interval. There are two tricky bits
+ * here. First, if ARP monitoring is activated, then we must disable
+ * MII monitoring. Second, if the ARP timer isn't running, we must
+ * start it.
+ */
+static ssize_t bonding_show_arp_interval(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.arp_interval);
+}
+
+static ssize_t bonding_store_arp_interval(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no arp_interval value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (new_value < 0) {
+ pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
+ bond->dev->name, new_value, INT_MAX);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (bond->params.mode == BOND_MODE_ALB ||
+ bond->params.mode == BOND_MODE_TLB ||
+ bond->params.mode == BOND_MODE_8023AD) {
+ pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n",
+ bond->dev->name, bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ pr_info("%s: Setting ARP monitoring interval to %d.\n",
+ bond->dev->name, new_value);
+ bond->params.arp_interval = new_value;
+ if (new_value) {
+ if (bond->params.miimon) {
+ pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
+ bond->dev->name, bond->dev->name);
+ bond->params.miimon = 0;
+ }
+ if (!bond->params.arp_targets[0])
+ pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
+ bond->dev->name);
+ }
+ if (bond->dev->flags & IFF_UP) {
+ /* If the interface is up, we may need to fire off
+ * the ARP timer. If the interface is down, the
+ * timer will get fired off when the open function
+ * is called.
+ */
+ if (!new_value) {
+ cancel_delayed_work_sync(&bond->arp_work);
+ } else {
+ cancel_delayed_work_sync(&bond->mii_work);
+ queue_delayed_work(bond->wq, &bond->arp_work, 0);
+ }
+ }
+out:
+ rtnl_unlock();
+ return ret;
+}
+static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
+ bonding_show_arp_interval, bonding_store_arp_interval);
+
+/*
+ * Show and set the arp targets.
+ */
+static ssize_t bonding_show_arp_targets(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int i, res = 0;
+ struct bonding *bond = to_bond(d);
+
+ for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
+ if (bond->params.arp_targets[i])
+ res += sprintf(buf + res, "%pI4 ",
+ &bond->params.arp_targets[i]);
+ }
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+ return res;
+}
+
+static ssize_t bonding_store_arp_targets(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ __be32 newtarget;
+ int i = 0, done = 0, ret = count;
+ struct bonding *bond = to_bond(d);
+ __be32 *targets;
+
+ targets = bond->params.arp_targets;
+ newtarget = in_aton(buf + 1);
+ /* look for adds */
+ if (buf[0] == '+') {
+ if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
+ pr_err("%s: invalid ARP target %pI4 specified for addition\n",
+ bond->dev->name, &newtarget);
+ ret = -EINVAL;
+ goto out;
+ }
+ /* look for an empty slot to put the target in, and check for dupes */
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
+ if (targets[i] == newtarget) { /* duplicate */
+ pr_err("%s: ARP target %pI4 is already present\n",
+ bond->dev->name, &newtarget);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (targets[i] == 0) {
+ pr_info("%s: adding ARP target %pI4.\n",
+ bond->dev->name, &newtarget);
+ done = 1;
+ targets[i] = newtarget;
+ }
+ }
+ if (!done) {
+ pr_err("%s: ARP target table is full!\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ } else if (buf[0] == '-') {
+ if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
+ pr_err("%s: invalid ARP target %pI4 specified for removal\n",
+ bond->dev->name, &newtarget);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
+ if (targets[i] == newtarget) {
+ int j;
+ pr_info("%s: removing ARP target %pI4.\n",
+ bond->dev->name, &newtarget);
+ for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
+ targets[j] = targets[j+1];
+
+ targets[j] = 0;
+ done = 1;
+ }
+ }
+ if (!done) {
+ pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
+ bond->dev->name, &newtarget);
+ ret = -EINVAL;
+ goto out;
+ }
+ } else {
+ pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
+
+/*
+ * Show and set the up and down delays. These must be multiples of the
+ * MII monitoring value, and are stored internally as the multiplier.
+ * Thus, we must translate to MS for the real world.
+ */
+static ssize_t bonding_show_downdelay(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
+}
+
+static ssize_t bonding_store_downdelay(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ if (!(bond->params.miimon)) {
+ pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no down delay value specified.\n", bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (new_value < 0) {
+ pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
+ bond->dev->name, new_value, 0, INT_MAX);
+ ret = -EINVAL;
+ goto out;
+ } else {
+ if ((new_value % bond->params.miimon) != 0) {
+ pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
+ bond->dev->name, new_value,
+ bond->params.miimon,
+ (new_value / bond->params.miimon) *
+ bond->params.miimon);
+ }
+ bond->params.downdelay = new_value / bond->params.miimon;
+ pr_info("%s: Setting down delay to %d.\n",
+ bond->dev->name,
+ bond->params.downdelay * bond->params.miimon);
+
+ }
+
+out:
+ rtnl_unlock();
+ return ret;
+}
+static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
+ bonding_show_downdelay, bonding_store_downdelay);
+
+static ssize_t bonding_show_updelay(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
+
+}
+
+static ssize_t bonding_store_updelay(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ if (!(bond->params.miimon)) {
+ pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no up delay value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (new_value < 0) {
+ pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
+ bond->dev->name, new_value, 0, INT_MAX);
+ ret = -EINVAL;
+ goto out;
+ } else {
+ if ((new_value % bond->params.miimon) != 0) {
+ pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
+ bond->dev->name, new_value,
+ bond->params.miimon,
+ (new_value / bond->params.miimon) *
+ bond->params.miimon);
+ }
+ bond->params.updelay = new_value / bond->params.miimon;
+ pr_info("%s: Setting up delay to %d.\n",
+ bond->dev->name,
+ bond->params.updelay * bond->params.miimon);
+ }
+
+out:
+ rtnl_unlock();
+ return ret;
+}
+static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
+ bonding_show_updelay, bonding_store_updelay);
+
+/*
+ * Show and set the LACP interval. Interface must be down, and the mode
+ * must be set to 802.3ad mode.
+ */
+static ssize_t bonding_show_lacp(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ bond_lacp_tbl[bond->params.lacp_fast].modename,
+ bond->params.lacp_fast);
+}
+
+static ssize_t bonding_store_lacp(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->dev->flags & IFF_UP) {
+ pr_err("%s: Unable to update LACP rate because interface is up.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (bond->params.mode != BOND_MODE_8023AD) {
+ pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ new_value = bond_parse_parm(buf, bond_lacp_tbl);
+
+ if ((new_value == 1) || (new_value == 0)) {
+ bond->params.lacp_fast = new_value;
+ bond_3ad_update_lacp_rate(bond);
+ pr_info("%s: Setting LACP rate to %s (%d).\n",
+ bond->dev->name, bond_lacp_tbl[new_value].modename,
+ new_value);
+ } else {
+ pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
+ bond->dev->name, (int)strlen(buf) - 1, buf);
+ ret = -EINVAL;
+ }
+out:
+ return ret;
+}
+static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
+ bonding_show_lacp, bonding_store_lacp);
+
+static ssize_t bonding_show_min_links(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.min_links);
+}
+
+static ssize_t bonding_store_min_links(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct bonding *bond = to_bond(d);
+ int ret;
+ unsigned int new_value;
+
+ ret = kstrtouint(buf, 0, &new_value);
+ if (ret < 0) {
+ pr_err("%s: Ignoring invalid min links value %s.\n",
+ bond->dev->name, buf);
+ return ret;
+ }
+
+ pr_info("%s: Setting min links value to %u\n",
+ bond->dev->name, new_value);
+ bond->params.min_links = new_value;
+ return count;
+}
+static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
+ bonding_show_min_links, bonding_store_min_links);
+
+static ssize_t bonding_show_ad_select(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ ad_select_tbl[bond->params.ad_select].modename,
+ bond->params.ad_select);
+}
+
+
+static ssize_t bonding_store_ad_select(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->dev->flags & IFF_UP) {
+ pr_err("%s: Unable to update ad_select because interface is up.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+ }
+
+ new_value = bond_parse_parm(buf, ad_select_tbl);
+
+ if (new_value != -1) {
+ bond->params.ad_select = new_value;
+ pr_info("%s: Setting ad_select to %s (%d).\n",
+ bond->dev->name, ad_select_tbl[new_value].modename,
+ new_value);
+ } else {
+ pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
+ bond->dev->name, (int)strlen(buf) - 1, buf);
+ ret = -EINVAL;
+ }
+out:
+ return ret;
+}
+static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
+ bonding_show_ad_select, bonding_store_ad_select);
+
+/*
+ * Show and set the number of peer notifications to send after a failover event.
+ */
+static ssize_t bonding_show_num_peer_notif(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+ return sprintf(buf, "%d\n", bond->params.num_peer_notif);
+}
+
+static ssize_t bonding_store_num_peer_notif(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct bonding *bond = to_bond(d);
+ int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
+ return err ? err : count;
+}
+static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
+ bonding_show_num_peer_notif, bonding_store_num_peer_notif);
+static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
+ bonding_show_num_peer_notif, bonding_store_num_peer_notif);
+
+/*
+ * Show and set the MII monitor interval. There are two tricky bits
+ * here. First, if MII monitoring is activated, then we must disable
+ * ARP monitoring. Second, if the timer isn't running, we must
+ * start it.
+ */
+static ssize_t bonding_show_miimon(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.miimon);
+}
+
+static ssize_t bonding_store_miimon(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no miimon value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (new_value < 0) {
+ pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
+ bond->dev->name, new_value, 0, INT_MAX);
+ ret = -EINVAL;
+ goto out;
+ }
+ pr_info("%s: Setting MII monitoring interval to %d.\n",
+ bond->dev->name, new_value);
+ bond->params.miimon = new_value;
+ if (bond->params.updelay)
+ pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
+ bond->dev->name,
+ bond->params.updelay * bond->params.miimon);
+ if (bond->params.downdelay)
+ pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
+ bond->dev->name,
+ bond->params.downdelay * bond->params.miimon);
+ if (new_value && bond->params.arp_interval) {
+ pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
+ bond->dev->name);
+ bond->params.arp_interval = 0;
+ if (bond->params.arp_validate)
+ bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
+ }
+ if (bond->dev->flags & IFF_UP) {
+ /* If the interface is up, we may need to fire off
+ * the MII timer. If the interface is down, the
+ * timer will get fired off when the open function
+ * is called.
+ */
+ if (!new_value) {
+ cancel_delayed_work_sync(&bond->mii_work);
+ } else {
+ cancel_delayed_work_sync(&bond->arp_work);
+ queue_delayed_work(bond->wq, &bond->mii_work, 0);
+ }
+ }
+out:
+ rtnl_unlock();
+ return ret;
+}
+static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
+ bonding_show_miimon, bonding_store_miimon);
+
+/*
+ * Show and set the primary slave. The store function is much
+ * simpler than bonding_store_slaves function because it only needs to
+ * handle one interface name.
+ * The bond must be a mode that supports a primary for this be
+ * set.
+ */
+static ssize_t bonding_show_primary(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->primary_slave)
+ count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
+
+ return count;
+}
+
+static ssize_t bonding_store_primary(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int i;
+ struct slave *slave;
+ struct bonding *bond = to_bond(d);
+ char ifname[IFNAMSIZ];
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ block_netpoll_tx();
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+
+ if (!USES_PRIMARY(bond->params.mode)) {
+ pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
+ bond->dev->name, bond->dev->name, bond->params.mode);
+ goto out;
+ }
+
+ sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
+
+ /* check to see if we are clearing primary */
+ if (!strlen(ifname) || buf[0] == '\n') {
+ pr_info("%s: Setting primary slave to None.\n",
+ bond->dev->name);
+ bond->primary_slave = NULL;
+ bond_select_active_slave(bond);
+ goto out;
+ }
+
+ bond_for_each_slave(bond, slave, i) {
+ if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
+ pr_info("%s: Setting %s as primary slave.\n",
+ bond->dev->name, slave->dev->name);
+ bond->primary_slave = slave;
+ strcpy(bond->params.primary, slave->dev->name);
+ bond_select_active_slave(bond);
+ goto out;
+ }
+ }
+
+ pr_info("%s: Unable to set %.*s as primary slave.\n",
+ bond->dev->name, (int)strlen(buf) - 1, buf);
+out:
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ unblock_netpoll_tx();
+ rtnl_unlock();
+
+ return count;
+}
+static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
+ bonding_show_primary, bonding_store_primary);
+
+/*
+ * Show and set the primary_reselect flag.
+ */
+static ssize_t bonding_show_primary_reselect(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%s %d\n",
+ pri_reselect_tbl[bond->params.primary_reselect].modename,
+ bond->params.primary_reselect);
+}
+
+static ssize_t bonding_store_primary_reselect(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ new_value = bond_parse_parm(buf, pri_reselect_tbl);
+ if (new_value < 0) {
+ pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
+ bond->dev->name,
+ (int) strlen(buf) - 1, buf);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ bond->params.primary_reselect = new_value;
+ pr_info("%s: setting primary_reselect to %s (%d).\n",
+ bond->dev->name, pri_reselect_tbl[new_value].modename,
+ new_value);
+
+ block_netpoll_tx();
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+ bond_select_active_slave(bond);
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ unblock_netpoll_tx();
+out:
+ rtnl_unlock();
+ return ret;
+}
+static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
+ bonding_show_primary_reselect,
+ bonding_store_primary_reselect);
+
+/*
+ * Show and set the use_carrier flag.
+ */
+static ssize_t bonding_show_carrier(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.use_carrier);
+}
+
+static ssize_t bonding_store_carrier(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no use_carrier value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ if ((new_value == 0) || (new_value == 1)) {
+ bond->params.use_carrier = new_value;
+ pr_info("%s: Setting use_carrier to %d.\n",
+ bond->dev->name, new_value);
+ } else {
+ pr_info("%s: Ignoring invalid use_carrier value %d.\n",
+ bond->dev->name, new_value);
+ }
+out:
+ return ret;
+}
+static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
+ bonding_show_carrier, bonding_store_carrier);
+
+
+/*
+ * Show and set currently active_slave.
+ */
+static ssize_t bonding_show_active_slave(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct slave *curr;
+ struct bonding *bond = to_bond(d);
+ int count = 0;
+
+ read_lock(&bond->curr_slave_lock);
+ curr = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ if (USES_PRIMARY(bond->params.mode) && curr)
+ count = sprintf(buf, "%s\n", curr->dev->name);
+ return count;
+}
+
+static ssize_t bonding_store_active_slave(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int i;
+ struct slave *slave;
+ struct slave *old_active = NULL;
+ struct slave *new_active = NULL;
+ struct bonding *bond = to_bond(d);
+ char ifname[IFNAMSIZ];
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ block_netpoll_tx();
+ read_lock(&bond->lock);
+ write_lock_bh(&bond->curr_slave_lock);
+
+ if (!USES_PRIMARY(bond->params.mode)) {
+ pr_info("%s: Unable to change active slave; %s is in mode %d\n",
+ bond->dev->name, bond->dev->name, bond->params.mode);
+ goto out;
+ }
+
+ sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
+
+ /* check to see if we are clearing active */
+ if (!strlen(ifname) || buf[0] == '\n') {
+ pr_info("%s: Clearing current active slave.\n",
+ bond->dev->name);
+ bond->curr_active_slave = NULL;
+ bond_select_active_slave(bond);
+ goto out;
+ }
+
+ bond_for_each_slave(bond, slave, i) {
+ if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
+ old_active = bond->curr_active_slave;
+ new_active = slave;
+ if (new_active == old_active) {
+ /* do nothing */
+ pr_info("%s: %s is already the current"
+ " active slave.\n",
+ bond->dev->name,
+ slave->dev->name);
+ goto out;
+ }
+ else {
+ if ((new_active) &&
+ (old_active) &&
+ (new_active->link == BOND_LINK_UP) &&
+ IS_UP(new_active->dev)) {
+ pr_info("%s: Setting %s as active"
+ " slave.\n",
+ bond->dev->name,
+ slave->dev->name);
+ bond_change_active_slave(bond,
+ new_active);
+ }
+ else {
+ pr_info("%s: Could not set %s as"
+ " active slave; either %s is"
+ " down or the link is down.\n",
+ bond->dev->name,
+ slave->dev->name,
+ slave->dev->name);
+ }
+ goto out;
+ }
+ }
+ }
+
+ pr_info("%s: Unable to set %.*s as active slave.\n",
+ bond->dev->name, (int)strlen(buf) - 1, buf);
+ out:
+ write_unlock_bh(&bond->curr_slave_lock);
+ read_unlock(&bond->lock);
+ unblock_netpoll_tx();
+
+ rtnl_unlock();
+
+ return count;
+
+}
+static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
+ bonding_show_active_slave, bonding_store_active_slave);
+
+
+/*
+ * Show link status of the bond interface.
+ */
+static ssize_t bonding_show_mii_status(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct slave *curr;
+ struct bonding *bond = to_bond(d);
+
+ read_lock(&bond->curr_slave_lock);
+ curr = bond->curr_active_slave;
+ read_unlock(&bond->curr_slave_lock);
+
+ return sprintf(buf, "%s\n", curr ? "up" : "down");
+}
+static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
+
+
+/*
+ * Show current 802.3ad aggregator ID.
+ */
+static ssize_t bonding_show_ad_aggregator(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ (bond_3ad_get_active_agg_info(bond, &ad_info))
+ ? 0 : ad_info.aggregator_id);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
+
+
+/*
+ * Show number of active 802.3ad ports.
+ */
+static ssize_t bonding_show_ad_num_ports(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ (bond_3ad_get_active_agg_info(bond, &ad_info))
+ ? 0 : ad_info.ports);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
+
+
+/*
+ * Show current 802.3ad actor key.
+ */
+static ssize_t bonding_show_ad_actor_key(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ (bond_3ad_get_active_agg_info(bond, &ad_info))
+ ? 0 : ad_info.actor_key);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
+
+
+/*
+ * Show current 802.3ad partner key.
+ */
+static ssize_t bonding_show_ad_partner_key(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ count = sprintf(buf, "%d\n",
+ (bond_3ad_get_active_agg_info(bond, &ad_info))
+ ? 0 : ad_info.partner_key);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
+
+
+/*
+ * Show current 802.3ad partner mac.
+ */
+static ssize_t bonding_show_ad_partner_mac(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int count = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ struct ad_info ad_info;
+ if (!bond_3ad_get_active_agg_info(bond, &ad_info))
+ count = sprintf(buf, "%pM\n", ad_info.partner_system);
+ }
+
+ return count;
+}
+static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
+
+/*
+ * Show the queue_ids of the slaves in the current bond.
+ */
+static ssize_t bonding_show_queue_id(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct slave *slave;
+ int i, res = 0;
+ struct bonding *bond = to_bond(d);
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ read_lock(&bond->lock);
+ bond_for_each_slave(bond, slave, i) {
+ if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
+ /* not enough space for another interface_name:queue_id pair */
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s:%d ",
+ slave->dev->name, slave->queue_id);
+ }
+ read_unlock(&bond->lock);
+ if (res)
+ buf[res-1] = '\n'; /* eat the leftover space */
+ rtnl_unlock();
+ return res;
+}
+
+/*
+ * Set the queue_ids of the slaves in the current bond. The bond
+ * interface must be enslaved for this to work.
+ */
+static ssize_t bonding_store_queue_id(struct device *d,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct slave *slave, *update_slave;
+ struct bonding *bond = to_bond(d);
+ u16 qid;
+ int i, ret = count;
+ char *delim;
+ struct net_device *sdev = NULL;
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+
+ /* delim will point to queue id if successful */
+ delim = strchr(buffer, ':');
+ if (!delim)
+ goto err_no_cmd;
+
+ /*
+ * Terminate string that points to device name and bump it
+ * up one, so we can read the queue id there.
+ */
+ *delim = '\0';
+ if (sscanf(++delim, "%hd\n", &qid) != 1)
+ goto err_no_cmd;
+
+ /* Check buffer length, valid ifname and queue id */
+ if (strlen(buffer) > IFNAMSIZ ||
+ !dev_valid_name(buffer) ||
+ qid > bond->params.tx_queues)
+ goto err_no_cmd;
+
+ /* Get the pointer to that interface if it exists */
+ sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
+ if (!sdev)
+ goto err_no_cmd;
+
+ read_lock(&bond->lock);
+
+ /* Search for thes slave and check for duplicate qids */
+ update_slave = NULL;
+ bond_for_each_slave(bond, slave, i) {
+ if (sdev == slave->dev)
+ /*
+ * We don't need to check the matching
+ * slave for dups, since we're overwriting it
+ */
+ update_slave = slave;
+ else if (qid && qid == slave->queue_id) {
+ goto err_no_cmd_unlock;
+ }
+ }
+
+ if (!update_slave)
+ goto err_no_cmd_unlock;
+
+ /* Actually set the qids for the slave */
+ update_slave->queue_id = qid;
+
+ read_unlock(&bond->lock);
+out:
+ rtnl_unlock();
+ return ret;
+
+err_no_cmd_unlock:
+ read_unlock(&bond->lock);
+err_no_cmd:
+ pr_info("invalid input for queue_id set for %s.\n",
+ bond->dev->name);
+ ret = -EPERM;
+ goto out;
+}
+
+static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
+ bonding_store_queue_id);
+
+
+/*
+ * Show and set the all_slaves_active flag.
+ */
+static ssize_t bonding_show_slaves_active(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.all_slaves_active);
+}
+
+static ssize_t bonding_store_slaves_active(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int i, new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+ struct slave *slave;
+
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no all_slaves_active value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (new_value == bond->params.all_slaves_active)
+ goto out;
+
+ if ((new_value == 0) || (new_value == 1)) {
+ bond->params.all_slaves_active = new_value;
+ } else {
+ pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
+ bond->dev->name, new_value);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ read_lock(&bond->lock);
+ bond_for_each_slave(bond, slave, i) {
+ if (!bond_is_active_slave(slave)) {
+ if (new_value)
+ slave->inactive = 0;
+ else
+ slave->inactive = 1;
+ }
+ }
+ read_unlock(&bond->lock);
+out:
+ return ret;
+}
+static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
+ bonding_show_slaves_active, bonding_store_slaves_active);
+
+/*
+ * Show and set the number of IGMP membership reports to send on link failure
+ */
+static ssize_t bonding_show_resend_igmp(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.resend_igmp);
+}
+
+static ssize_t bonding_store_resend_igmp(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ pr_err("%s: no resend_igmp value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (new_value < 0 || new_value > 255) {
+ pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
+ bond->dev->name, new_value);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pr_info("%s: Setting resend_igmp to %d.\n",
+ bond->dev->name, new_value);
+ bond->params.resend_igmp = new_value;
+out:
+ return ret;
+}
+
+static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
+ bonding_show_resend_igmp, bonding_store_resend_igmp);
+
+static struct attribute *per_bond_attrs[] = {
+ &dev_attr_slaves.attr,
+ &dev_attr_mode.attr,
+ &dev_attr_fail_over_mac.attr,
+ &dev_attr_arp_validate.attr,
+ &dev_attr_arp_interval.attr,
+ &dev_attr_arp_ip_target.attr,
+ &dev_attr_downdelay.attr,
+ &dev_attr_updelay.attr,
+ &dev_attr_lacp_rate.attr,
+ &dev_attr_ad_select.attr,
+ &dev_attr_xmit_hash_policy.attr,
+ &dev_attr_num_grat_arp.attr,
+ &dev_attr_num_unsol_na.attr,
+ &dev_attr_miimon.attr,
+ &dev_attr_primary.attr,
+ &dev_attr_primary_reselect.attr,
+ &dev_attr_use_carrier.attr,
+ &dev_attr_active_slave.attr,
+ &dev_attr_mii_status.attr,
+ &dev_attr_ad_aggregator.attr,
+ &dev_attr_ad_num_ports.attr,
+ &dev_attr_ad_actor_key.attr,
+ &dev_attr_ad_partner_key.attr,
+ &dev_attr_ad_partner_mac.attr,
+ &dev_attr_queue_id.attr,
+ &dev_attr_all_slaves_active.attr,
+ &dev_attr_resend_igmp.attr,
+ &dev_attr_min_links.attr,
+ NULL,
+};
+
+static struct attribute_group bonding_group = {
+ .name = "bonding",
+ .attrs = per_bond_attrs,
+};
+
+/*
+ * Initialize sysfs. This sets up the bonding_masters file in
+ * /sys/class/net.
+ */
+int bond_create_sysfs(struct bond_net *bn)
+{
+ int ret;
+
+ bn->class_attr_bonding_masters = class_attr_bonding_masters;
+ sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
+
+ ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
+ /*
+ * Permit multiple loads of the module by ignoring failures to
+ * create the bonding_masters sysfs file. Bonding devices
+ * created by second or subsequent loads of the module will
+ * not be listed in, or controllable by, bonding_masters, but
+ * will have the usual "bonding" sysfs directory.
+ *
+ * This is done to preserve backwards compatibility for
+ * initscripts/sysconfig, which load bonding multiple times to
+ * configure multiple bonding devices.
+ */
+ if (ret == -EEXIST) {
+ /* Is someone being kinky and naming a device bonding_master? */
+ if (__dev_get_by_name(bn->net,
+ class_attr_bonding_masters.attr.name))
+ pr_err("network device named %s already exists in sysfs",
+ class_attr_bonding_masters.attr.name);
+ ret = 0;
+ }
+
+ return ret;
+
+}
+
+/*
+ * Remove /sys/class/net/bonding_masters.
+ */
+void bond_destroy_sysfs(struct bond_net *bn)
+{
+ netdev_class_remove_file(&bn->class_attr_bonding_masters);
+}
+
+/*
+ * Initialize sysfs for each bond. This sets up and registers
+ * the 'bondctl' directory for each individual bond under /sys/class/net.
+ */
+void bond_prepare_sysfs_group(struct bonding *bond)
+{
+ bond->dev->sysfs_groups[0] = &bonding_group;
+}
+
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/bonding/bonding.h b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bonding.h
new file mode 100644
index 0000000..51f1766
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/bonding/bonding.h
@@ -0,0 +1,477 @@
+/*
+ * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
+ *
+ * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
+ * NCM: Network and Communications Management, Inc.
+ *
+ * BUT, I'm the one who modified it for ethernet, so:
+ * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU Public License, incorporated herein by reference.
+ *
+ */
+
+#ifndef _LINUX_BONDING_H
+#define _LINUX_BONDING_H
+
+#include <linux/timer.h>
+#include <linux/proc_fs.h>
+#include <linux/if_bonding.h>
+#include <linux/etherdevice.h>
+#include <linux/cpumask.h>
+#include <linux/in6.h>
+#include <linux/netpoll.h>
+#include <linux/inetdevice.h>
+#include "bond_3ad.h"
+#include "bond_alb.h"
+
+#define DRV_VERSION "3.7.1"
+#define DRV_RELDATE "April 27, 2011"
+#define DRV_NAME "bonding"
+#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
+
+#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
+
+#define BOND_MAX_ARP_TARGETS 16
+
+#define IS_UP(dev) \
+ ((((dev)->flags & IFF_UP) == IFF_UP) && \
+ netif_running(dev) && \
+ netif_carrier_ok(dev))
+
+/*
+ * Checks whether slave is ready for transmit.
+ */
+#define SLAVE_IS_OK(slave) \
+ (((slave)->dev->flags & IFF_UP) && \
+ netif_running((slave)->dev) && \
+ ((slave)->link == BOND_LINK_UP) && \
+ bond_is_active_slave(slave))
+
+
+#define USES_PRIMARY(mode) \
+ (((mode) == BOND_MODE_ACTIVEBACKUP) || \
+ ((mode) == BOND_MODE_TLB) || \
+ ((mode) == BOND_MODE_ALB))
+
+#define TX_QUEUE_OVERRIDE(mode) \
+ (((mode) == BOND_MODE_ACTIVEBACKUP) || \
+ ((mode) == BOND_MODE_ROUNDROBIN))
+/*
+ * Less bad way to call ioctl from within the kernel; this needs to be
+ * done some other way to get the call out of interrupt context.
+ * Needs "ioctl" variable to be supplied by calling context.
+ */
+#define IOCTL(dev, arg, cmd) ({ \
+ int res = 0; \
+ mm_segment_t fs = get_fs(); \
+ set_fs(get_ds()); \
+ res = ioctl(dev, arg, cmd); \
+ set_fs(fs); \
+ res; })
+
+/**
+ * bond_for_each_slave_from - iterate the slaves list from a starting point
+ * @bond: the bond holding this list.
+ * @pos: current slave.
+ * @cnt: counter for max number of moves
+ * @start: starting point.
+ *
+ * Caller must hold bond->lock
+ */
+#define bond_for_each_slave_from(bond, pos, cnt, start) \
+ for (cnt = 0, pos = start; \
+ cnt < (bond)->slave_cnt; \
+ cnt++, pos = (pos)->next)
+
+/**
+ * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
+ * @bond: the bond holding this list.
+ * @pos: current slave.
+ * @cnt: counter for number max of moves
+ * @start: start point.
+ * @stop: stop point.
+ *
+ * Caller must hold bond->lock
+ */
+#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
+ for (cnt = 0, pos = start; \
+ ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
+ cnt++, pos = (pos)->next)
+
+/**
+ * bond_for_each_slave - iterate the slaves list from head
+ * @bond: the bond holding this list.
+ * @pos: current slave.
+ * @cnt: counter for max number of moves
+ *
+ * Caller must hold bond->lock
+ */
+#define bond_for_each_slave(bond, pos, cnt) \
+ bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
+
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+extern atomic_t netpoll_block_tx;
+
+static inline void block_netpoll_tx(void)
+{
+ atomic_inc(&netpoll_block_tx);
+}
+
+static inline void unblock_netpoll_tx(void)
+{
+ atomic_dec(&netpoll_block_tx);
+}
+
+static inline int is_netpoll_tx_blocked(struct net_device *dev)
+{
+ if (unlikely(netpoll_tx_running(dev)))
+ return atomic_read(&netpoll_block_tx);
+ return 0;
+}
+#else
+#define block_netpoll_tx()
+#define unblock_netpoll_tx()
+#define is_netpoll_tx_blocked(dev) (0)
+#endif
+
+struct bond_params {
+ int mode;
+ int xmit_policy;
+ int miimon;
+ u8 num_peer_notif;
+ int arp_interval;
+ int arp_validate;
+ int use_carrier;
+ int fail_over_mac;
+ int updelay;
+ int downdelay;
+ int lacp_fast;
+ unsigned int min_links;
+ int ad_select;
+ char primary[IFNAMSIZ];
+ int primary_reselect;
+ __be32 arp_targets[BOND_MAX_ARP_TARGETS];
+ int tx_queues;
+ int all_slaves_active;
+ int resend_igmp;
+};
+
+struct bond_parm_tbl {
+ char *modename;
+ int mode;
+};
+
+#define BOND_MAX_MODENAME_LEN 20
+
+struct vlan_entry {
+ struct list_head vlan_list;
+ unsigned short vlan_id;
+};
+
+struct slave {
+ struct net_device *dev; /* first - useful for panic debug */
+ struct slave *next;
+ struct slave *prev;
+ struct bonding *bond; /* our master */
+ int delay;
+ unsigned long jiffies;
+ unsigned long last_arp_rx;
+ s8 link; /* one of BOND_LINK_XXXX */
+ s8 new_link;
+ u8 backup:1, /* indicates backup slave. Value corresponds with
+ BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
+ inactive:1; /* indicates inactive slave */
+ u8 duplex;
+ u32 original_mtu;
+ u32 link_failure_count;
+ u32 speed;
+ u16 queue_id;
+ u8 perm_hwaddr[ETH_ALEN];
+ struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
+ struct tlb_slave_info tlb_info;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct netpoll *np;
+#endif
+};
+
+/*
+ * Link pseudo-state only used internally by monitors
+ */
+#define BOND_LINK_NOCHANGE -1
+
+/*
+ * Here are the locking policies for the two bonding locks:
+ *
+ * 1) Get bond->lock when reading/writing slave list.
+ * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
+ * (It is unnecessary when the write-lock is put with bond->lock.)
+ * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
+ * beforehand.
+ */
+struct bonding {
+ struct net_device *dev; /* first - useful for panic debug */
+ struct slave *first_slave;
+ struct slave *curr_active_slave;
+ struct slave *current_arp_slave;
+ struct slave *primary_slave;
+ bool force_primary;
+ s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
+ int (*recv_probe)(struct sk_buff *, struct bonding *,
+ struct slave *);
+ rwlock_t lock;
+ rwlock_t curr_slave_lock;
+ u8 send_peer_notif;
+ s8 setup_by_slave;
+ s8 igmp_retrans;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_entry;
+ char proc_file_name[IFNAMSIZ];
+#endif /* CONFIG_PROC_FS */
+ struct list_head bond_list;
+ struct netdev_hw_addr_list mc_list;
+ int (*xmit_hash_policy)(struct sk_buff *, int);
+ u16 rr_tx_counter;
+ struct ad_bond_info ad_info;
+ struct alb_bond_info alb_info;
+ struct bond_params params;
+ struct list_head vlan_list;
+ struct workqueue_struct *wq;
+ struct delayed_work mii_work;
+ struct delayed_work arp_work;
+ struct delayed_work alb_work;
+ struct delayed_work ad_work;
+ struct delayed_work mcast_work;
+#ifdef CONFIG_DEBUG_FS
+ /* debugging suport via debugfs */
+ struct dentry *debug_dir;
+#endif /* CONFIG_DEBUG_FS */
+};
+
+static inline bool bond_vlan_used(struct bonding *bond)
+{
+ return !list_empty(&bond->vlan_list);
+}
+
+#define bond_slave_get_rcu(dev) \
+ ((struct slave *) rcu_dereference(dev->rx_handler_data))
+
+/**
+ * Returns NULL if the net_device does not belong to any of the bond's slaves
+ *
+ * Caller must hold bond lock for read
+ */
+static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
+ struct net_device *slave_dev)
+{
+ struct slave *slave = NULL;
+ int i;
+
+ bond_for_each_slave(bond, slave, i) {
+ if (slave->dev == slave_dev) {
+ return slave;
+ }
+ }
+
+ return NULL;
+}
+
+static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
+{
+ if (!slave || !slave->dev->master) {
+ return NULL;
+ }
+
+ return netdev_priv(slave->dev->master);
+}
+
+static inline bool bond_is_lb(const struct bonding *bond)
+{
+ return (bond->params.mode == BOND_MODE_TLB ||
+ bond->params.mode == BOND_MODE_ALB);
+}
+
+static inline void bond_set_active_slave(struct slave *slave)
+{
+ slave->backup = 0;
+}
+
+static inline void bond_set_backup_slave(struct slave *slave)
+{
+ slave->backup = 1;
+}
+
+static inline int bond_slave_state(struct slave *slave)
+{
+ return slave->backup;
+}
+
+static inline bool bond_is_active_slave(struct slave *slave)
+{
+ return !bond_slave_state(slave);
+}
+
+#define BOND_PRI_RESELECT_ALWAYS 0
+#define BOND_PRI_RESELECT_BETTER 1
+#define BOND_PRI_RESELECT_FAILURE 2
+
+#define BOND_FOM_NONE 0
+#define BOND_FOM_ACTIVE 1
+#define BOND_FOM_FOLLOW 2
+
+#define BOND_ARP_VALIDATE_NONE 0
+#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
+#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
+#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
+ BOND_ARP_VALIDATE_BACKUP)
+
+static inline int slave_do_arp_validate(struct bonding *bond,
+ struct slave *slave)
+{
+ return bond->params.arp_validate & (1 << bond_slave_state(slave));
+}
+
+static inline unsigned long slave_last_rx(struct bonding *bond,
+ struct slave *slave)
+{
+ if (slave_do_arp_validate(bond, slave))
+ return slave->last_arp_rx;
+
+ return slave->dev->last_rx;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline void bond_netpoll_send_skb(const struct slave *slave,
+ struct sk_buff *skb)
+{
+ struct netpoll *np = slave->np;
+
+ if (np)
+ netpoll_send_skb(np, skb);
+}
+#else
+static inline void bond_netpoll_send_skb(const struct slave *slave,
+ struct sk_buff *skb)
+{
+}
+#endif
+
+static inline void bond_set_slave_inactive_flags(struct slave *slave)
+{
+ struct bonding *bond = netdev_priv(slave->dev->master);
+ if (!bond_is_lb(bond))
+ bond_set_backup_slave(slave);
+ if (!bond->params.all_slaves_active)
+ slave->inactive = 1;
+}
+
+static inline void bond_set_slave_active_flags(struct slave *slave)
+{
+ bond_set_active_slave(slave);
+ slave->inactive = 0;
+}
+
+static inline bool bond_is_slave_inactive(struct slave *slave)
+{
+ return slave->inactive;
+}
+
+static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
+{
+ struct in_device *in_dev;
+ __be32 addr = 0;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(dev);
+
+ if (in_dev)
+ addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
+
+ rcu_read_unlock();
+ return addr;
+}
+
+struct bond_net;
+
+struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
+int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
+int bond_create(struct net *net, const char *name);
+int bond_create_sysfs(struct bond_net *net);
+void bond_destroy_sysfs(struct bond_net *net);
+void bond_prepare_sysfs_group(struct bonding *bond);
+int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
+void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
+int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
+int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
+void bond_mii_monitor(struct work_struct *);
+void bond_loadbalance_arp_mon(struct work_struct *);
+void bond_activebackup_arp_mon(struct work_struct *);
+void bond_set_mode_ops(struct bonding *bond, int mode);
+int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
+void bond_select_active_slave(struct bonding *bond);
+void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
+void bond_create_debugfs(void);
+void bond_destroy_debugfs(void);
+void bond_debug_register(struct bonding *bond);
+void bond_debug_unregister(struct bonding *bond);
+void bond_debug_reregister(struct bonding *bond);
+const char *bond_mode_name(int mode);
+
+struct bond_net {
+ struct net * net; /* Associated network namespace */
+ struct list_head dev_list;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry * proc_dir;
+#endif
+ struct class_attribute class_attr_bonding_masters;
+};
+
+#ifdef CONFIG_PROC_FS
+void bond_create_proc_entry(struct bonding *bond);
+void bond_remove_proc_entry(struct bonding *bond);
+void bond_create_proc_dir(struct bond_net *bn);
+void bond_destroy_proc_dir(struct bond_net *bn);
+#else
+static inline void bond_create_proc_entry(struct bonding *bond)
+{
+}
+
+static inline void bond_remove_proc_entry(struct bonding *bond)
+{
+}
+
+static inline void bond_create_proc_dir(struct bond_net *bn)
+{
+}
+
+static inline void bond_destroy_proc_dir(struct bond_net *bn)
+{
+}
+#endif
+
+static inline struct slave *bond_slave_has_mac(struct bonding *bond,
+ const u8 *mac)
+{
+ int i = 0;
+ struct slave *tmp;
+
+ bond_for_each_slave(bond, tmp, i)
+ if (!compare_ether_addr_64bits(mac, tmp->dev->dev_addr))
+ return tmp;
+
+ return NULL;
+}
+
+/* exported from bond_main.c */
+extern int bond_net_id;
+extern const struct bond_parm_tbl bond_lacp_tbl[];
+extern const struct bond_parm_tbl bond_mode_tbl[];
+extern const struct bond_parm_tbl xmit_hashtype_tbl[];
+extern const struct bond_parm_tbl arp_validate_tbl[];
+extern const struct bond_parm_tbl fail_over_mac_tbl[];
+extern const struct bond_parm_tbl pri_reselect_tbl[];
+extern struct bond_parm_tbl ad_select_tbl[];
+
+#endif /* _LINUX_BONDING_H */