net: group address list and its count

This patch is inspired by patch recently posted by Johannes Berg. Basically what
my patch does is to group list and a count of addresses into newly introduced
structure netdev_hw_addr_list. This brings us two benefits:
1) struct net_device becames a bit nicer.
2) in the future there will be a possibility to operate with lists independently
   on netdevices (with exporting right functions).
I wanted to introduce this patch before I'll post a multicast lists conversion.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>

 drivers/net/bnx2.c              |    4 +-
 drivers/net/e1000/e1000_main.c  |    4 +-
 drivers/net/ixgbe/ixgbe_main.c  |    6 +-
 drivers/net/mv643xx_eth.c       |    2 +-
 drivers/net/niu.c               |    4 +-
 drivers/net/virtio_net.c        |   10 ++--
 drivers/s390/net/qeth_l2_main.c |    2 +-
 include/linux/netdevice.h       |   17 +++--
 net/core/dev.c                  |  130 ++++++++++++++++++--------------------
 9 files changed, 89 insertions(+), 90 deletions(-)
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2.c

@@ -3552,14 +3552,14 @@ bnx2_set_rx_mode(struct net_device *dev)
 		sort_mode |= BNX2_RPM_SORT_USER0_MC_HSH_EN;
 	}
 
-	if (dev->uc_count > BNX2_MAX_UNICAST_ADDRESSES) {
+	if (dev->uc.count > BNX2_MAX_UNICAST_ADDRESSES) {
 		rx_mode |= BNX2_EMAC_RX_MODE_PROMISCUOUS;
 		sort_mode |= BNX2_RPM_SORT_USER0_PROM_EN |
 			     BNX2_RPM_SORT_USER0_PROM_VLAN;
 	} else if (!(dev->flags & IFF_PROMISC)) {
 		/* Add all entries into to the match filter list */
 		i = 0;
-		list_for_each_entry(ha, &dev->uc_list, list) {
+		list_for_each_entry(ha, &dev->uc.list, list) {
 			bnx2_set_mac_addr(bp, ha->addr,
 					  i + BNX2_START_UNICAST_ADDRESS_INDEX);
 			sort_mode |= (1 <<

drivers/net/e1000/e1000_main.c

@@ -2370,7 +2370,7 @@ static void e1000_set_rx_mode(struct net_device *netdev)
 			rctl |= E1000_RCTL_VFE;
 	}
 
-	if (netdev->uc_count > rar_entries - 1) {
+	if (netdev->uc.count > rar_entries - 1) {
 		rctl |= E1000_RCTL_UPE;
 	} else if (!(netdev->flags & IFF_PROMISC)) {
 		rctl &= ~E1000_RCTL_UPE;
@@ -2394,7 +2394,7 @@ static void e1000_set_rx_mode(struct net_device *netdev)
 	 */
 	i = 1;
 	if (use_uc)
-		list_for_each_entry(ha, &netdev->uc_list, list) {
+		list_for_each_entry(ha, &netdev->uc.list, list) {
 			if (i == rar_entries)
 				break;
 			e1000_rar_set(hw, ha->addr, i++);

drivers/net/ixgbe/ixgbe_main.c

@@ -2321,7 +2321,7 @@ static void ixgbe_set_rx_mode(struct net_device *netdev)
 	IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
 
 	/* reprogram secondary unicast list */
-	hw->mac.ops.update_uc_addr_list(hw, &netdev->uc_list);
+	hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
 
 	/* reprogram multicast list */
 	addr_count = netdev->mc_count;
@@ -5261,7 +5261,7 @@ static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
 
 /**
  * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
- * netdev->dev_addr_list
+ * netdev->dev_addrs
  * @netdev: network interface device structure
  *
  * Returns non-zero on failure
@@ -5282,7 +5282,7 @@ static int ixgbe_add_sanmac_netdev(struct net_device *dev)
 
 /**
  * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
- * netdev->dev_addr_list
+ * netdev->dev_addrs
  * @netdev: network interface device structure
  *
  * Returns non-zero on failure

drivers/net/mv643xx_eth.c

@@ -1729,7 +1729,7 @@ static u32 uc_addr_filter_mask(struct net_device *dev)
 		return 0;
 
 	nibbles = 1 << (dev->dev_addr[5] & 0x0f);
-	list_for_each_entry(ha, &dev->uc_list, list) {
+	list_for_each_entry(ha, &dev->uc.list, list) {
 		if (memcmp(dev->dev_addr, ha->addr, 5))
 			return 0;
 		if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)

drivers/net/niu.c

@@ -6376,7 +6376,7 @@ static void niu_set_rx_mode(struct net_device *dev)
 	if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 0))
 		np->flags |= NIU_FLAGS_MCAST;
 
-	alt_cnt = dev->uc_count;
+	alt_cnt = dev->uc.count;
 	if (alt_cnt > niu_num_alt_addr(np)) {
 		alt_cnt = 0;
 		np->flags |= NIU_FLAGS_PROMISC;
@@ -6385,7 +6385,7 @@ static void niu_set_rx_mode(struct net_device *dev)
 	if (alt_cnt) {
 		int index = 0;
 
-		list_for_each_entry(ha, &dev->uc_list, list) {
+		list_for_each_entry(ha, &dev->uc.list, list) {
 			err = niu_set_alt_mac(np, index, ha->addr);
 			if (err)
 				printk(KERN_WARNING PFX "%s: Error %d "

drivers/net/virtio_net.c

@@ -709,7 +709,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
 			 allmulti ? "en" : "dis");
 
 	/* MAC filter - use one buffer for both lists */
-	mac_data = buf = kzalloc(((dev->uc_count + dev->mc_count) * ETH_ALEN) +
+	mac_data = buf = kzalloc(((dev->uc.count + dev->mc_count) * ETH_ALEN) +
 				 (2 * sizeof(mac_data->entries)), GFP_ATOMIC);
 	if (!buf) {
 		dev_warn(&dev->dev, "No memory for MAC address buffer\n");
@@ -719,16 +719,16 @@ static void virtnet_set_rx_mode(struct net_device *dev)
 	sg_init_table(sg, 2);
 
 	/* Store the unicast list and count in the front of the buffer */
-	mac_data->entries = dev->uc_count;
+	mac_data->entries = dev->uc.count;
 	i = 0;
-	list_for_each_entry(ha, &dev->uc_list, list)
+	list_for_each_entry(ha, &dev->uc.list, list)
 		memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN);
 
 	sg_set_buf(&sg[0], mac_data,
-		   sizeof(mac_data->entries) + (dev->uc_count * ETH_ALEN));
+		   sizeof(mac_data->entries) + (dev->uc.count * ETH_ALEN));
 
 	/* multicast list and count fill the end */
-	mac_data = (void *)&mac_data->macs[dev->uc_count][0];
+	mac_data = (void *)&mac_data->macs[dev->uc.count][0];
 
 	mac_data->entries = dev->mc_count;
 	addr = dev->mc_list;

drivers/s390/net/qeth_l2_main.c

@@ -655,7 +655,7 @@ static void qeth_l2_set_multicast_list(struct net_device *dev)
 	for (dm = dev->mc_list; dm; dm = dm->next)
 		qeth_l2_add_mc(card, dm->da_addr, 0);
 
-	list_for_each_entry(ha, &dev->uc_list, list)
+	list_for_each_entry(ha, &dev->uc.list, list)
 		qeth_l2_add_mc(card, ha->addr, 1);
 
 	spin_unlock_bh(&card->mclock);

include/linux/netdevice.h

@@ -224,6 +224,11 @@ struct netdev_hw_addr {
 	struct rcu_head		rcu_head;
 };
 
+struct netdev_hw_addr_list {
+	struct list_head	list;
+	int			count;
+};
+
 struct hh_cache
 {
 	struct hh_cache *hh_next;	/* Next entry			     */
@@ -776,9 +781,8 @@ struct net_device
 	unsigned char		addr_len;	/* hardware address length	*/
 	unsigned short          dev_id;		/* for shared network cards */
 
-	struct list_head	uc_list;	/* Secondary unicast mac
-						   addresses */
-	int			uc_count;	/* Number of installed ucasts	*/
+	struct netdev_hw_addr_list	uc;	/* Secondary unicast
+						   mac addresses */
 	int			uc_promisc;
 	spinlock_t		addr_list_lock;
 	struct dev_addr_list	*mc_list;	/* Multicast mac addresses	*/
@@ -810,7 +814,8 @@ struct net_device
 						   because most packets are
 						   unicast) */
 
-	struct list_head	dev_addr_list; /* list of device hw addresses */
+	struct netdev_hw_addr_list	dev_addrs; /* list of device
+						      hw addresses */
 
 	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
 
@@ -1806,11 +1811,11 @@ static inline void netif_addr_unlock_bh(struct net_device *dev)
 }
 
 /*
- * dev_addr_list walker. Should be used only for read access. Call with
+ * dev_addrs walker. Should be used only for read access. Call with
  * rcu_read_lock held.
  */
 #define for_each_dev_addr(dev, ha) \
-		list_for_each_entry_rcu(ha, &dev->dev_addr_list, list)
+		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
 
 /* These functions live elsewhere (drivers/net/net_init.c, but related) */