Linux-libre 4.4-gnupck-4.4-gnu

1 files changed, 51 insertions, 62 deletions

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 3c4535884..940e2ebbd 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -127,6 +127,7 @@ static void ad_marker_info_received(struct bond_marker *marker_info,
 				    struct port *port);
 static void ad_marker_response_received(struct bond_marker *marker,
 					struct port *port);
+static void ad_update_actor_keys(struct port *port, bool reset);
 
 
 /* ================= api to bonding and kernel code ================== */
@@ -327,14 +328,12 @@ static u16 __get_link_speed(struct port *port)
 static u8 __get_duplex(struct port *port)
 {
 	struct slave *slave = port->slave;
-	u8 retval;
+	u8 retval = 0x0;
 
 	/* handling a special case: when the configuration starts with
 	 * link down, it sets the duplex to 0.
 	 */
-	if (slave->link != BOND_LINK_UP) {
-		retval = 0x0;
-	} else {
+	if (slave->link == BOND_LINK_UP) {
 		switch (slave->duplex) {
 		case DUPLEX_FULL:
 			retval = 0x1;
@@ -1953,14 +1952,7 @@ void bond_3ad_bind_slave(struct slave *slave)
 		 * user key
 		 */
 		port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
-		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_MASKS))
-			port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+		ad_update_actor_keys(port, false);
 		/* actor system is the bond's system */
 		port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
 		port->actor_system_priority =
@@ -2310,45 +2302,60 @@ static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
 }
 
 /**
- * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
- * @slave: slave struct to work on
+ * ad_update_actor_keys - Update the oper / admin keys for a port based on
+ * its current speed and duplex settings.
  *
- * Handle reselection of aggregator (if needed) for this port.
+ * @port: the port we'are looking at
+ * @reset: Boolean to just reset the speed and the duplex part of the key
+ *
+ * The logic to change the oper / admin keys is:
+ * (a) A full duplex port can participate in LACP with partner.
+ * (b) When the speed is changed, LACP need to be reinitiated.
  */
-void bond_3ad_adapter_speed_changed(struct slave *slave)
+static void ad_update_actor_keys(struct port *port, bool reset)
 {
-	struct port *port;
-
-	port = &(SLAVE_AD_INFO(slave)->port);
-
-	/* if slave is null, the whole port is not initialized */
-	if (!port->slave) {
-		netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n",
-			    slave->dev->name);
-		return;
+	u8 duplex = 0;
+	u16 ospeed = 0, speed = 0;
+	u16 old_oper_key = port->actor_oper_port_key;
+
+	port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
+	if (!reset) {
+		speed = __get_link_speed(port);
+		ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
+		duplex = __get_duplex(port);
+		port->actor_admin_port_key |= (speed << 1) | duplex;
 	}
-
-	spin_lock_bh(&slave->bond->mode_lock);
-
-	port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
-	port->actor_admin_port_key |= __get_link_speed(port) << 1;
 	port->actor_oper_port_key = port->actor_admin_port_key;
-	netdev_dbg(slave->bond->dev, "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;
 
-	spin_unlock_bh(&slave->bond->mode_lock);
+	if (old_oper_key != port->actor_oper_port_key) {
+		/* Only 'duplex' port participates in LACP */
+		if (duplex)
+			port->sm_vars |= AD_PORT_LACP_ENABLED;
+		else
+			port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+
+		if (!reset) {
+			if (!speed) {
+				netdev_err(port->slave->dev,
+					   "speed changed to 0 for port %s",
+					   port->slave->dev->name);
+			} else if (duplex && ospeed != speed) {
+				/* Speed change restarts LACP state-machine */
+				port->sm_vars |= AD_PORT_BEGIN;
+			}
+		}
+	}
 }
 
 /**
- * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
+ * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
+ * change indication
+ *
  * @slave: slave struct to work on
  *
  * Handle reselection of aggregator (if needed) for this port.
  */
-void bond_3ad_adapter_duplex_changed(struct slave *slave)
+void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
 {
 	struct port *port;
 
@@ -2356,25 +2363,16 @@ void bond_3ad_adapter_duplex_changed(struct slave *slave)
 
 	/* if slave is null, the whole port is not initialized */
 	if (!port->slave) {
-		netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n",
+		netdev_warn(slave->bond->dev,
+			    "speed/duplex changed for uninitialized port %s\n",
 			    slave->dev->name);
 		return;
 	}
 
 	spin_lock_bh(&slave->bond->mode_lock);
-
-	port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
-	port->actor_admin_port_key |= __get_duplex(port);
-	port->actor_oper_port_key = port->actor_admin_port_key;
-	netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n",
+	ad_update_actor_keys(port, false);
+	netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/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
-	 */
-	port->sm_vars |= AD_PORT_BEGIN;
-
 	spin_unlock_bh(&slave->bond->mode_lock);
 }
 
@@ -2406,26 +2404,17 @@ void bond_3ad_handle_link_change(struct slave *slave, char link)
 	 * on link up we are forcing recheck on the duplex and speed since
 	 * some of he adaptors(ce1000.lan) report.
 	 */
-	port->actor_admin_port_key &= ~(AD_DUPLEX_KEY_MASKS|AD_SPEED_KEY_MASKS);
 	if (link == BOND_LINK_UP) {
 		port->is_enabled = true;
-		port->actor_admin_port_key |=
-			(__get_link_speed(port) << 1) | __get_duplex(port);
-		if (port->actor_admin_port_key & AD_DUPLEX_KEY_MASKS)
-			port->sm_vars |= AD_PORT_LACP_ENABLED;
+		ad_update_actor_keys(port, false);
 	} else {
 		/* link has failed */
 		port->is_enabled = false;
-		port->sm_vars &= ~AD_PORT_LACP_ENABLED;
+		ad_update_actor_keys(port, true);
 	}
-	port->actor_oper_port_key = port->actor_admin_port_key;
 	netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
 		   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;
 
 	spin_unlock_bh(&slave->bond->mode_lock);