6 files changed, 333 insertions, 129 deletions

diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt
index 3f4d0fae7081..5ede7473b425 100644
--- a/Documentation/networking/bonding.txt
+++ b/Documentation/networking/bonding.txt
@@ -194,6 +194,48 @@ or, for backwards compatibility, the option value.  E.g.,
 
         The parameters are as follows:
 
+ad_select
+
+        Specifies the 802.3ad aggregation selection logic to use.  The
+        possible values and their effects are:
+
+        stable or 0
+
+                The active aggregator is chosen by largest aggregate
+                bandwidth.
+
+                Reselection of the active aggregator occurs only when all
+                slaves of the active aggregator are down or the active
+                aggregator has no slaves.
+
+                This is the default value.
+
+        bandwidth or 1
+
+                The active aggregator is chosen by largest aggregate
+                bandwidth.  Reselection occurs if:
+
+                - A slave is added to or removed from the bond
+
+                - Any slave's link state changes
+
+                - Any slave's 802.3ad association state changes
+
+                - The bond's adminstrative state changes to up
+
+        count or 2
+
+                The active aggregator is chosen by the largest number of
+                ports (slaves).  Reselection occurs as described under the
+                "bandwidth" setting, above.
+
+        The bandwidth and count selection policies permit failover of
+        802.3ad aggregations when partial failure of the active aggregator
+        occurs.  This keeps the aggregator with the highest availability
+        (either in bandwidth or in number of ports) active at all times.
+
+        This option was added in bonding version 3.4.0.
+
 arp_interval
 
         Specifies the ARP link monitoring frequency in milliseconds.
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 6106660a4a44..ba1372f2f144 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -27,6 +27,7 @@
 #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>
@@ -236,6 +237,17 @@ static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
         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
@@ -274,14 +286,14 @@ static inline int __port_is_enabled(struct port *port)
  * __get_agg_selection_mode - get the aggregator selection mode
  * @port: the port we're looking at
  *
- * Get the aggregator selection mode. Can be %BANDWIDTH or %COUNT.
+ * 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 AD_BANDWIDTH;
+                return BOND_AD_STABLE;
         }
 
         return BOND_AD_INFO(bond).agg_select_mode;
@@ -1414,9 +1426,82 @@ static void ad_port_selection_logic(struct port *port)
         // else set ready=FALSE in all aggregator's ports
         __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
 
-        if (!__check_agg_selection_timer(port) && (aggregator = __get_first_agg(port))) {
-                ad_agg_selection_logic(aggregator);
+        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:
+                printk(KERN_WARNING DRV_NAME
+                       ": %s: Impossible agg select mode %d\n",
+                       curr->slave->dev->master->name,
+                       __get_agg_selection_mode(curr->lag_ports));
+                break;
         }
+
+        return best;
 }
 
 /**
@@ -1424,156 +1509,138 @@ static void ad_port_selection_logic(struct port *port)
  * @aggregator: the aggregator we're looking at
  *
  * It is assumed that only one aggregator may be selected for a team.
- * The logic of this function is to select (at first time) the aggregator with
- * the most ports attached to it, and to reselect the active aggregator only if
- * the previous aggregator has no more ports related to it.
+ *
+ * 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 *aggregator)
+static void ad_agg_selection_logic(struct aggregator *agg)
 {
-        struct aggregator *best_aggregator = NULL, *active_aggregator = NULL;
-        struct aggregator *last_active_aggregator = NULL, *origin_aggregator;
+        struct aggregator *best, *active, *origin;
         struct port *port;
-        u16 num_of_aggs=0;
 
-        origin_aggregator = aggregator;
+        origin = agg;
 
-        //get current active aggregator
-        last_active_aggregator = __get_active_agg(aggregator);
+        active = __get_active_agg(agg);
+        best = active;
 
-        // search for the aggregator with the most ports attached to it.
         do {
-                // count how many candidate lag's we have
-                if (aggregator->lag_ports) {
-                        num_of_aggs++;
-                }
-                if (aggregator->is_active && !aggregator->is_individual &&   // if current aggregator is the active aggregator
-                    MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr))) {   // and partner answers to 802.3ad PDUs
-                        if (aggregator->num_of_ports) { // if any ports attached to the current aggregator
-                                best_aggregator=NULL;    // disregard the best aggregator that was chosen by now
-                                break;           // stop the selection of other aggregator if there are any ports attached to this active aggregator
-                        } else { // no ports attached to this active aggregator
-                                aggregator->is_active = 0; // mark this aggregator as not active anymore
+                agg->is_active = 0;
+
+                if (agg->num_of_ports)
+                        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 (aggregator->num_of_ports) { // if any ports attached
-                        if (best_aggregator) {  // if there is a candidte aggregator
-                                //The reasons for choosing new best aggregator:
-                                // 1. if current agg is NOT individual and the best agg chosen so far is individual OR
-                                // current and best aggs are both individual or both not individual, AND
-                                // 2a.  current agg partner reply but best agg partner do not reply OR
-                                // 2b.  current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply AND
-                                //      current has more ports/bandwidth, or same amount of ports but current has faster ports, THEN
-                                //      current agg become best agg so far
-
-                                //if current agg is NOT individual and the best agg chosen so far is individual change best_aggregator
-                                if (!aggregator->is_individual && best_aggregator->is_individual) {
-                                        best_aggregator=aggregator;
-                                }
-                                // current and best aggs are both individual or both not individual
-                                else if ((aggregator->is_individual && best_aggregator->is_individual) ||
-                                         (!aggregator->is_individual && !best_aggregator->is_individual)) {
-                                        //  current and best aggs are both individual or both not individual AND
-                                        //  current agg partner reply but best agg partner do not reply
-                                        if ((MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) &&
-                                             !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) {
-                                                best_aggregator=aggregator;
-                                        }
-                                        //  current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply
-                                        else if (! (!MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) &&
-                                                    MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) {
-                                                if ((__get_agg_selection_mode(aggregator->lag_ports) == AD_BANDWIDTH)&&
-                                                    (__get_agg_bandwidth(aggregator) > __get_agg_bandwidth(best_aggregator))) {
-                                                        best_aggregator=aggregator;
-                                                } else if (__get_agg_selection_mode(aggregator->lag_ports) == AD_COUNT) {
-                                                        if (((aggregator->num_of_ports > best_aggregator->num_of_ports) &&
-                                                             (aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS))||
-                                                            ((aggregator->num_of_ports == best_aggregator->num_of_ports) &&
-                                                             ((u16)(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS) >
-                                                              (u16)(best_aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS)))) {
-                                                                best_aggregator=aggregator;
-                                                        }
-                                                }
-                                        }
-                                }
-                        } else {
-                                best_aggregator=aggregator;
-                        }
-                }
-                aggregator->is_active = 0; // mark all aggregators as not active anymore
-        } while ((aggregator = __get_next_agg(aggregator)));
-
-        // if we have new aggregator selected, don't replace the old aggregator if it has an answering partner,
-        // or if both old aggregator and new aggregator don't have answering partner
-        if (best_aggregator) {
-                if (last_active_aggregator && last_active_aggregator->lag_ports && last_active_aggregator->lag_ports->is_enabled &&
-                    (MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) ||   // partner answers OR
-                     (!MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) &&      // both old and new
-                      !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr))))     // partner do not answer
-                   ) {
-                        // if new aggregator has link, and old aggregator does not, replace old aggregator.(do nothing)
-                        // -> don't replace otherwise.
-                        if (!(!last_active_aggregator->actor_oper_aggregator_key && best_aggregator->actor_oper_aggregator_key)) {
-                                best_aggregator=NULL;
-                                last_active_aggregator->is_active = 1; // don't replace good old aggregator
+        }
 
-                        }
-                }
+        if (best && (best == active)) {
+                best = NULL;
+                active->is_active = 1;
         }
 
         // if there is new best aggregator, activate it
-        if (best_aggregator) {
-                for (aggregator = __get_first_agg(best_aggregator->lag_ports);
-                    aggregator;
-                    aggregator = __get_next_agg(aggregator)) {
-
-                        dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n",
-                                        aggregator->aggregator_identifier, aggregator->num_of_ports,
-                                        aggregator->actor_oper_aggregator_key, aggregator->partner_oper_aggregator_key,
-                                        aggregator->is_individual, aggregator->is_active);
+        if (best) {
+                dprintk("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);
+                dprintk("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)) {
+
+                        dprintk("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_aggregator->is_individual) {
-                        printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad response from "
-                               "the link partner for any adapters in the bond\n",
-                               best_aggregator->slave->dev->master->name);
-                }
-
-                // check if there are more than one aggregator
-                if (num_of_aggs > 1) {
-                        dprintk("Warning: More than one Link Aggregation Group was "
-                                "found in the bond. Only one group will function in the bond\n");
+                if (best->is_individual) {
+                        printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad"
+                               " response from the link partner for any"
+                               " adapters in the bond\n",
+                               best->slave->dev->master->name);
                 }
 
-                best_aggregator->is_active = 1;
-                dprintk("LAG %d choosed as the active LAG\n", best_aggregator->aggregator_identifier);
-                dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n",
-                                best_aggregator->aggregator_identifier, best_aggregator->num_of_ports,
-                                best_aggregator->actor_oper_aggregator_key, best_aggregator->partner_oper_aggregator_key,
-                                best_aggregator->is_individual, best_aggregator->is_active);
+                best->is_active = 1;
+                dprintk("LAG %d chosen as the active LAG\n",
+                        best->aggregator_identifier);
+                dprintk("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 (last_active_aggregator) {
-                        for (port=last_active_aggregator->lag_ports; port; port=port->next_port_in_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_aggregator = __get_active_agg(origin_aggregator);
+        /*
+         * if the selected aggregator is of join individuals
+         * (partner_system is NULL), enable their ports
+         */
+        active = __get_active_agg(origin);
 
-        if (active_aggregator) {
-                if (!MAC_ADDRESS_COMPARE(&(active_aggregator->partner_system), &(null_mac_addr))) {
-                        for (port=active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
+        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);
+        }
 }
 
 /**
@@ -1830,6 +1897,19 @@ static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
 // 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_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
+}
+
 static u16 aggregator_identifier;
 
 /**
@@ -1854,9 +1934,9 @@ void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fas
                 // initialize how many times this module is called in one second(should be about every 100ms)
                 ad_ticks_per_sec = tick_resolution;
 
-                // initialize the aggregator selection timer(to activate an aggregation selection after initialize)
-                BOND_AD_INFO(bond).agg_select_timer = (AD_AGGREGATOR_SELECTION_TIMER * ad_ticks_per_sec);
-                BOND_AD_INFO(bond).agg_select_mode = AD_BANDWIDTH;
+                bond_3ad_initiate_agg_selection(bond,
+                                                AD_AGGREGATOR_SELECTION_TIMER *
+                                                ad_ticks_per_sec);
         }
 }
 
diff --git a/drivers/net/bonding/bond_3ad.h b/drivers/net/bonding/bond_3ad.h
index b5ee45f6d55a..a803fe05f63e 100644
--- a/drivers/net/bonding/bond_3ad.h
+++ b/drivers/net/bonding/bond_3ad.h
@@ -42,10 +42,11 @@ typedef struct mac_addr {
         u8 mac_addr_value[ETH_ALEN];
 } mac_addr_t;
 
-typedef enum {
-        AD_BANDWIDTH = 0,
-        AD_COUNT
-} agg_selection_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 {
@@ -277,6 +278,7 @@ void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fas
 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);
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 798d98ce2d97..02de3e031237 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -97,6 +97,7 @@ static int use_carrier	= 1;
 static char *mode       = NULL;
 static char *primary    = NULL;
 static char *lacp_rate  = NULL;
+static char *ad_select  = NULL;
 static char *xmit_hash_policy = NULL;
 static int arp_interval = BOND_LINK_ARP_INTERV;
 static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
@@ -130,6 +131,8 @@ MODULE_PARM_DESC(primary, "Primary network device to use");
 module_param(lacp_rate, charp, 0);
 MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
                             "(slow/fast)");
+module_param(ad_select, charp, 0);
+MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
 module_param(xmit_hash_policy, charp, 0);
 MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
                                    ", 1 for layer 3+4");
@@ -200,6 +203,13 @@ struct bond_parm_tbl fail_over_mac_tbl[] = {
 {       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 void bond_send_gratuitous_arp(struct bonding *bond);
@@ -3318,6 +3328,8 @@ static void bond_info_show_master(struct seq_file *seq)
                 seq_puts(seq, "\n802.3ad info\n");
                 seq_printf(seq, "LACP rate: %s\n",
                            (bond->params.lacp_fast) ? "fast" : "slow");
+                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",
@@ -3824,6 +3836,7 @@ static int bond_open(struct net_device *bond_dev)
                 queue_delayed_work(bond->wq, &bond->ad_work, 0);
                 /* register to receive LACPDUs */
                 bond_register_lacpdu(bond);
+                bond_3ad_initiate_agg_selection(bond, 1);
         }
 
         return 0;
@@ -4763,6 +4776,23 @@ static int bond_check_params(struct bond_params *params)
                 }
         }
 
+        if (ad_select) {
+                params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
+                if (params->ad_select == -1) {
+                        printk(KERN_ERR DRV_NAME
+                               ": Error: Invalid ad_select \"%s\"\n",
+                               ad_select == NULL ? "NULL" : ad_select);
+                        return -EINVAL;
+                }
+
+                if (bond_mode != BOND_MODE_8023AD) {
+                        printk(KERN_WARNING DRV_NAME
+                               ": ad_select param only affects 802.3ad mode\n");
+                }
+        } else {
+                params->ad_select = BOND_AD_STABLE;
+        }
+
         if (max_bonds < 0 || max_bonds > INT_MAX) {
                 printk(KERN_WARNING DRV_NAME
                        ": Warning: max_bonds (%d) not in range %d-%d, so it "
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 8788e3e33852..aaf2927b5c38 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -48,6 +48,7 @@ extern struct list_head bond_dev_list;
 extern struct bond_params bonding_defaults;
 extern struct bond_parm_tbl bond_mode_tbl[];
 extern struct bond_parm_tbl bond_lacp_tbl[];
+extern struct bond_parm_tbl ad_select_tbl[];
 extern struct bond_parm_tbl xmit_hashtype_tbl[];
 extern struct bond_parm_tbl arp_validate_tbl[];
 extern struct bond_parm_tbl fail_over_mac_tbl[];
@@ -944,6 +945,53 @@ out:
 }
 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 
+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) {
+                printk(KERN_ERR DRV_NAME
+                       ": %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;
+                printk(KERN_INFO DRV_NAME
+                       ": %s: Setting ad_select to %s (%d).\n",
+                       bond->dev->name, ad_select_tbl[new_value].modename,
+                       new_value);
+        } else {
+                printk(KERN_ERR DRV_NAME
+                       ": %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 grat ARP to send after a failover event.
  */
@@ -1459,6 +1507,7 @@ static struct attribute *per_bond_attrs[] = {
         &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,
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index 0491c7c2645b..b5eb8e65b309 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -23,8 +23,8 @@
 #include "bond_3ad.h"
 #include "bond_alb.h"
 
-#define DRV_VERSION     "3.4.0"
-#define DRV_RELDATE     "October 7, 2008"
+#define DRV_VERSION     "3.5.0"
+#define DRV_RELDATE     "November 4, 2008"
 #define DRV_NAME        "bonding"
 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
 
@@ -137,6 +137,7 @@ struct bond_params {
         int updelay;
         int downdelay;
         int lacp_fast;
+        int ad_select;
         char primary[IFNAMSIZ];
         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
 };