net: convert multicast list to list_head
Converts the list and the core manipulating with it to be the same as uc_list.
+uses two functions for adding/removing mc address (normal and "global"
variant) instead of a function parameter.
+removes dev_mcast.c completely.
+exposes netdev_hw_addr_list_* macros along with __hw_addr_* functions for
manipulation with lists on a sandbox (used in bonding and 80211 drivers)
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c
index 7e52b6d..37d5975 100644
--- a/net/core/dev_addr_lists.c
+++ b/net/core/dev_addr_lists.c
@@ -19,8 +19,9 @@
* General list handling functions
*/
-static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr,
- int addr_len, unsigned char addr_type)
+static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
+ unsigned char *addr, int addr_len,
+ unsigned char addr_type, bool global)
{
struct netdev_hw_addr *ha;
int alloc_size;
@@ -31,6 +32,13 @@
list_for_each_entry(ha, &list->list, list) {
if (!memcmp(ha->addr, addr, addr_len) &&
ha->type == addr_type) {
+ if (global) {
+ /* check if addr is already used as global */
+ if (ha->global_use)
+ return 0;
+ else
+ ha->global_use = true;
+ }
ha->refcount++;
return 0;
}
@@ -46,12 +54,19 @@
memcpy(ha->addr, addr, addr_len);
ha->type = addr_type;
ha->refcount = 1;
+ ha->global_use = global;
ha->synced = false;
list_add_tail_rcu(&ha->list, &list->list);
list->count++;
return 0;
}
+static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr,
+ int addr_len, unsigned char addr_type)
+{
+ return __hw_addr_add_ex(list, addr, addr_len, addr_type, false);
+}
+
static void ha_rcu_free(struct rcu_head *head)
{
struct netdev_hw_addr *ha;
@@ -60,14 +75,21 @@
kfree(ha);
}
-static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr,
- int addr_len, unsigned char addr_type)
+static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
+ unsigned char *addr, int addr_len,
+ unsigned char addr_type, bool global)
{
struct netdev_hw_addr *ha;
list_for_each_entry(ha, &list->list, list) {
if (!memcmp(ha->addr, addr, addr_len) &&
(ha->type == addr_type || !addr_type)) {
+ if (global) {
+ if (!ha->global_use)
+ break;
+ else
+ ha->global_use = false;
+ }
if (--ha->refcount)
return 0;
list_del_rcu(&ha->list);
@@ -79,10 +101,15 @@
return -ENOENT;
}
-static int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
- struct netdev_hw_addr_list *from_list,
- int addr_len,
- unsigned char addr_type)
+static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr,
+ int addr_len, unsigned char addr_type)
+{
+ return __hw_addr_del_ex(list, addr, addr_len, addr_type, false);
+}
+
+int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
+ struct netdev_hw_addr_list *from_list,
+ int addr_len, unsigned char addr_type)
{
int err;
struct netdev_hw_addr *ha, *ha2;
@@ -105,11 +132,11 @@
}
return err;
}
+EXPORT_SYMBOL(__hw_addr_add_multiple);
-static void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
- struct netdev_hw_addr_list *from_list,
- int addr_len,
- unsigned char addr_type)
+void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
+ struct netdev_hw_addr_list *from_list,
+ int addr_len, unsigned char addr_type)
{
struct netdev_hw_addr *ha;
unsigned char type;
@@ -119,10 +146,11 @@
__hw_addr_del(to_list, ha->addr, addr_len, addr_type);
}
}
+EXPORT_SYMBOL(__hw_addr_del_multiple);
-static int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
- struct netdev_hw_addr_list *from_list,
- int addr_len)
+int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
+ struct netdev_hw_addr_list *from_list,
+ int addr_len)
{
int err = 0;
struct netdev_hw_addr *ha, *tmp;
@@ -142,10 +170,11 @@
}
return err;
}
+EXPORT_SYMBOL(__hw_addr_sync);
-static void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
- struct netdev_hw_addr_list *from_list,
- int addr_len)
+void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
+ struct netdev_hw_addr_list *from_list,
+ int addr_len)
{
struct netdev_hw_addr *ha, *tmp;
@@ -159,8 +188,9 @@
}
}
}
+EXPORT_SYMBOL(__hw_addr_unsync);
-static void __hw_addr_flush(struct netdev_hw_addr_list *list)
+void __hw_addr_flush(struct netdev_hw_addr_list *list)
{
struct netdev_hw_addr *ha, *tmp;
@@ -170,12 +200,14 @@
}
list->count = 0;
}
+EXPORT_SYMBOL(__hw_addr_flush);
-static void __hw_addr_init(struct netdev_hw_addr_list *list)
+void __hw_addr_init(struct netdev_hw_addr_list *list)
{
INIT_LIST_HEAD(&list->list);
list->count = 0;
}
+EXPORT_SYMBOL(__hw_addr_init);
/*
* Device addresses handling functions
@@ -475,4 +507,235 @@
* Multicast list handling functions
*/
-/* To be filled here */
+static int __dev_mc_add(struct net_device *dev, unsigned char *addr,
+ bool global)
+{
+ int err;
+
+ netif_addr_lock_bh(dev);
+ err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len,
+ NETDEV_HW_ADDR_T_MULTICAST, global);
+ if (!err)
+ __dev_set_rx_mode(dev);
+ netif_addr_unlock_bh(dev);
+ return err;
+}
+/**
+ * dev_mc_add - Add a multicast address
+ * @dev: device
+ * @addr: address to add
+ *
+ * Add a multicast address to the device or increase
+ * the reference count if it already exists.
+ */
+int dev_mc_add(struct net_device *dev, unsigned char *addr)
+{
+ return __dev_mc_add(dev, addr, false);
+}
+EXPORT_SYMBOL(dev_mc_add);
+
+/**
+ * dev_mc_add_global - Add a global multicast address
+ * @dev: device
+ * @addr: address to add
+ *
+ * Add a global multicast address to the device.
+ */
+int dev_mc_add_global(struct net_device *dev, unsigned char *addr)
+{
+ return __dev_mc_add(dev, addr, true);
+}
+EXPORT_SYMBOL(dev_mc_add_global);
+
+static int __dev_mc_del(struct net_device *dev, unsigned char *addr,
+ bool global)
+{
+ int err;
+
+ netif_addr_lock_bh(dev);
+ err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len,
+ NETDEV_HW_ADDR_T_MULTICAST, global);
+ if (!err)
+ __dev_set_rx_mode(dev);
+ netif_addr_unlock_bh(dev);
+ return err;
+}
+
+/**
+ * dev_mc_del - Delete a multicast address.
+ * @dev: device
+ * @addr: address to delete
+ *
+ * Release reference to a multicast address and remove it
+ * from the device if the reference count drops to zero.
+ */
+int dev_mc_del(struct net_device *dev, unsigned char *addr)
+{
+ return __dev_mc_del(dev, addr, false);
+}
+EXPORT_SYMBOL(dev_mc_del);
+
+/**
+ * dev_mc_del_global - Delete a global multicast address.
+ * @dev: device
+ * @addr: address to delete
+ *
+ * Release reference to a multicast address and remove it
+ * from the device if the reference count drops to zero.
+ */
+int dev_mc_del_global(struct net_device *dev, unsigned char *addr)
+{
+ return __dev_mc_del(dev, addr, true);
+}
+EXPORT_SYMBOL(dev_mc_del_global);
+
+/**
+ * dev_mc_sync - Synchronize device's unicast list to another device
+ * @to: destination device
+ * @from: source device
+ *
+ * Add newly added addresses to the destination device and release
+ * addresses that have no users left. The source device must be
+ * locked by netif_tx_lock_bh.
+ *
+ * This function is intended to be called from the dev->set_multicast_list
+ * or dev->set_rx_mode function of layered software devices.
+ */
+int dev_mc_sync(struct net_device *to, struct net_device *from)
+{
+ int err = 0;
+
+ if (to->addr_len != from->addr_len)
+ return -EINVAL;
+
+ netif_addr_lock_bh(to);
+ err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len);
+ if (!err)
+ __dev_set_rx_mode(to);
+ netif_addr_unlock_bh(to);
+ return err;
+}
+EXPORT_SYMBOL(dev_mc_sync);
+
+/**
+ * dev_mc_unsync - Remove synchronized addresses from the destination device
+ * @to: destination device
+ * @from: source device
+ *
+ * Remove all addresses that were added to the destination device by
+ * dev_mc_sync(). This function is intended to be called from the
+ * dev->stop function of layered software devices.
+ */
+void dev_mc_unsync(struct net_device *to, struct net_device *from)
+{
+ if (to->addr_len != from->addr_len)
+ return;
+
+ netif_addr_lock_bh(from);
+ netif_addr_lock(to);
+ __hw_addr_unsync(&to->mc, &from->mc, to->addr_len);
+ __dev_set_rx_mode(to);
+ netif_addr_unlock(to);
+ netif_addr_unlock_bh(from);
+}
+EXPORT_SYMBOL(dev_mc_unsync);
+
+/**
+ * dev_mc_flush - Flush multicast addresses
+ * @dev: device
+ *
+ * Flush multicast addresses.
+ */
+void dev_mc_flush(struct net_device *dev)
+{
+ netif_addr_lock_bh(dev);
+ __hw_addr_flush(&dev->mc);
+ netif_addr_unlock_bh(dev);
+}
+EXPORT_SYMBOL(dev_mc_flush);
+
+/**
+ * dev_mc_flush - Init multicast address list
+ * @dev: device
+ *
+ * Init multicast address list.
+ */
+void dev_mc_init(struct net_device *dev)
+{
+ __hw_addr_init(&dev->mc);
+}
+EXPORT_SYMBOL(dev_mc_init);
+
+#ifdef CONFIG_PROC_FS
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static int dev_mc_seq_show(struct seq_file *seq, void *v)
+{
+ struct netdev_hw_addr *ha;
+ struct net_device *dev = v;
+
+ if (v == SEQ_START_TOKEN)
+ return 0;
+
+ netif_addr_lock_bh(dev);
+ netdev_for_each_mc_addr(ha, dev) {
+ int i;
+
+ seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
+ dev->name, ha->refcount, ha->global_use);
+
+ for (i = 0; i < dev->addr_len; i++)
+ seq_printf(seq, "%02x", ha->addr[i]);
+
+ seq_putc(seq, '\n');
+ }
+ netif_addr_unlock_bh(dev);
+ return 0;
+}
+
+static const struct seq_operations dev_mc_seq_ops = {
+ .start = dev_seq_start,
+ .next = dev_seq_next,
+ .stop = dev_seq_stop,
+ .show = dev_mc_seq_show,
+};
+
+static int dev_mc_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open_net(inode, file, &dev_mc_seq_ops,
+ sizeof(struct seq_net_private));
+}
+
+static const struct file_operations dev_mc_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = dev_mc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_net,
+};
+
+#endif
+
+static int __net_init dev_mc_net_init(struct net *net)
+{
+ if (!proc_net_fops_create(net, "dev_mcast", 0, &dev_mc_seq_fops))
+ return -ENOMEM;
+ return 0;
+}
+
+static void __net_exit dev_mc_net_exit(struct net *net)
+{
+ proc_net_remove(net, "dev_mcast");
+}
+
+static struct pernet_operations __net_initdata dev_mc_net_ops = {
+ .init = dev_mc_net_init,
+ .exit = dev_mc_net_exit,
+};
+
+void __init dev_mcast_init(void)
+{
+ register_pernet_subsys(&dev_mc_net_ops);
+}
+
