Merge branch 'bonding-next'

Jonathan Toppins says:

====================
bonding: various 802.3ad fixes

This patch series is a forward porting of patches we (Cumulus) are shipping
in our 3.2 series kernels. These fixes attempt to make 802.3ad bonding mode
more predictable in certian state machine transtions in addition to fixing
802.3ad bond carrier determination when bonding min_links option is changed.
Specific notes are contained within each patch.

For this patch series there are no userspace facing changes, a diff between
the modinfo output showed no difference. However, there are behavioral
facing changes, primarily in the bond carrier state. Please make sure to
review carefully.

v2:
 * fixed some style issues
 * dropped a portion of patch 1 in favor of more testing on my side
====================

Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_3ad.c

@@ -467,11 +467,14 @@ static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
 		/* 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))
+		if ((port->sm_vars & AD_PORT_MATCHED) &&
+		    (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
 			partner->port_state |= AD_STATE_SYNCHRONIZATION;
-		else
+			pr_debug("%s partner sync=1\n", port->slave->dev->name);
+		} else {
 			partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
+			pr_debug("%s partner sync=0\n", port->slave->dev->name);
+		}
 	}
 }
 
@@ -726,6 +729,8 @@ static inline void __update_lacpdu_from_port(struct port *port)
 	lacpdu->actor_port_priority = htons(port->actor_port_priority);
 	lacpdu->actor_port = htons(port->actor_port_number);
 	lacpdu->actor_state = port->actor_oper_port_state;
+	pr_debug("update lacpdu: %s, actor port state %x\n",
+		 port->slave->dev->name, port->actor_oper_port_state);
 
 	/* lacpdu->reserved_3_1              initialized
 	 * lacpdu->tlv_type_partner_info     initialized
@@ -898,7 +903,9 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 			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;
+				if (port->aggregator->is_active)
+					port->sm_mux_state =
+					    AD_MUX_COLLECTING_DISTRIBUTING;
 			} else if (!(port->sm_vars & AD_PORT_SELECTED) ||
 				   (port->sm_vars & AD_PORT_STANDBY)) {
 				/* if UNSELECTED or STANDBY */
@@ -910,12 +917,16 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 				 */
 				__set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
 				port->sm_mux_state = AD_MUX_DETACHED;
+			} else if (port->aggregator->is_active) {
+				port->actor_oper_port_state |=
+				    AD_STATE_SYNCHRONIZATION;
 			}
 			break;
 		case AD_MUX_COLLECTING_DISTRIBUTING:
 			if (!(port->sm_vars & AD_PORT_SELECTED) ||
 			    (port->sm_vars & AD_PORT_STANDBY) ||
-			    !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) {
+			    !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
+			    !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
 				port->sm_mux_state = AD_MUX_ATTACHED;
 			} else {
 				/* if port state hasn't changed make
@@ -937,8 +948,10 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 
 	/* 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,
+		pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
+			 port->actor_port_number,
+			 port->slave->dev->name,
+			 last_state,
 			 port->sm_mux_state);
 		switch (port->sm_mux_state) {
 		case AD_MUX_DETACHED:
@@ -953,7 +966,12 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 			port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
 			break;
 		case AD_MUX_ATTACHED:
-			port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
+			if (port->aggregator->is_active)
+				port->actor_oper_port_state |=
+				    AD_STATE_SYNCHRONIZATION;
+			else
+				port->actor_oper_port_state &=
+				    ~AD_STATE_SYNCHRONIZATION;
 			port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
 			port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
 			ad_disable_collecting_distributing(port,
@@ -963,6 +981,7 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 		case AD_MUX_COLLECTING_DISTRIBUTING:
 			port->actor_oper_port_state |= AD_STATE_COLLECTING;
 			port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
+			port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
 			ad_enable_collecting_distributing(port,
 							  update_slave_arr);
 			port->ntt = true;
@@ -1044,8 +1063,10 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
 
 	/* 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,
+		pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
+			 port->actor_port_number,
+			 port->slave->dev->name,
+			 last_state,
 			 port->sm_rx_state);
 		switch (port->sm_rx_state) {
 		case AD_RX_INITIALIZE:
@@ -1394,6 +1415,9 @@ static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
 
 	aggregator = __get_first_agg(port);
 	ad_agg_selection_logic(aggregator, update_slave_arr);
+
+	if (!port->aggregator->is_active)
+		port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
 }
 
 /* Decide if "agg" is a better choice for the new active aggregator that
@@ -2195,8 +2219,10 @@ static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
 		switch (lacpdu->subtype) {
 		case AD_TYPE_LACPDU:
 			ret = RX_HANDLER_CONSUMED;
-			netdev_dbg(slave->bond->dev, "Received LACPDU on port %d\n",
-				   port->actor_port_number);
+			netdev_dbg(slave->bond->dev,
+				   "Received LACPDU on port %d slave %s\n",
+				   port->actor_port_number,
+				   slave->dev->name);
 			/* Protect against concurrent state machines */
 			spin_lock(&slave->bond->mode_lock);
 			ad_rx_machine(lacpdu, port);
@@ -2288,7 +2314,10 @@ void bond_3ad_adapter_duplex_changed(struct slave *slave)
 	port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
 	port->actor_oper_port_key = port->actor_admin_port_key |=
 		__get_duplex(port);
-	netdev_dbg(slave->bond->dev, "Port %d changed duplex\n", port->actor_port_number);
+	netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n",
+		   port->actor_port_number, slave->dev->name);
+	if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
+		port->sm_vars |= AD_PORT_LACP_ENABLED;
 	/* there is no need to reselect a new aggregator, just signal the
 	 * state machines to reinitialize
 	 */

drivers/net/bonding/bond_main.c

@@ -334,7 +334,7 @@ static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
  *
  * Returns zero if carrier state does not change, nonzero if it does.
  */
-static int bond_set_carrier(struct bonding *bond)
+int bond_set_carrier(struct bonding *bond)
 {
 	struct list_head *iter;
 	struct slave *slave;
@@ -3066,7 +3066,7 @@ static int bond_open(struct net_device *bond_dev)
 			    slave != rcu_access_pointer(bond->curr_active_slave)) {
 				bond_set_slave_inactive_flags(slave,
 							      BOND_SLAVE_NOTIFY_NOW);
-			} else {
+			} else if (BOND_MODE(bond) != BOND_MODE_8023AD) {
 				bond_set_slave_active_flags(slave,
 							    BOND_SLAVE_NOTIFY_NOW);
 			}
@@ -3734,7 +3734,7 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
  * usable slave array is formed in the control path. The xmit function
  * just calculates hash and sends the packet out.
  */
-int bond_3ad_xor_xmit(struct sk_buff *skb, struct net_device *dev)
+static int bond_3ad_xor_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct bonding *bond = netdev_priv(dev);
 	struct slave *slave;

drivers/net/bonding/bond_options.c

@@ -1181,6 +1181,7 @@ static int bond_option_min_links_set(struct bonding *bond,
 	netdev_info(bond->dev, "Setting min links value to %llu\n",
 		    newval->value);
 	bond->params.min_links = newval->value;
+	bond_set_carrier(bond);
 
 	return 0;
 }

include/net/bond_3ad.h

@@ -274,7 +274,6 @@ 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_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(const struct sk_buff *skb, struct bonding *bond,
 			 struct slave *slave);
 int bond_3ad_set_carrier(struct bonding *bond);

include/net/bonding.h

@@ -525,6 +525,7 @@ void bond_sysfs_slave_del(struct slave *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);
 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
+int bond_set_carrier(struct bonding *bond);
 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);