diff options
| -rw-r--r-- | include/linux/netdevice.h | 2 | ||||
| -rw-r--r-- | net/core/dev_addr_lists.c | 97 |
2 files changed, 83 insertions, 16 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 100c48cca4fd..e0b70e961e61 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2569,6 +2569,7 @@ extern int dev_addr_init(struct net_device *dev); /* Functions used for unicast addresses handling */ extern int dev_uc_add(struct net_device *dev, unsigned char *addr); +extern int dev_uc_add_excl(struct net_device *dev, unsigned char *addr); extern int dev_uc_del(struct net_device *dev, unsigned char *addr); extern int dev_uc_sync(struct net_device *to, struct net_device *from); extern void dev_uc_unsync(struct net_device *to, struct net_device *from); @@ -2578,6 +2579,7 @@ extern void dev_uc_init(struct net_device *dev); /* Functions used for multicast addresses handling */ extern int dev_mc_add(struct net_device *dev, unsigned char *addr); extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); +extern int dev_mc_add_excl(struct net_device *dev, unsigned char *addr); extern int dev_mc_del(struct net_device *dev, unsigned char *addr); extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); extern int dev_mc_sync(struct net_device *to, struct net_device *from); diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c index 626698f0db8b..c4cc2bc49f06 100644 --- a/net/core/dev_addr_lists.c +++ b/net/core/dev_addr_lists.c @@ -21,12 +21,35 @@ * General list handling functions */ +static int __hw_addr_create_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; + + alloc_size = sizeof(*ha); + if (alloc_size < L1_CACHE_BYTES) + alloc_size = L1_CACHE_BYTES; + ha = kmalloc(alloc_size, GFP_ATOMIC); + if (!ha) + return -ENOMEM; + 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_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; if (addr_len > MAX_ADDR_LEN) return -EINVAL; @@ -46,21 +69,7 @@ static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, } } - - alloc_size = sizeof(*ha); - if (alloc_size < L1_CACHE_BYTES) - alloc_size = L1_CACHE_BYTES; - ha = kmalloc(alloc_size, GFP_ATOMIC); - if (!ha) - return -ENOMEM; - 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; + return __hw_addr_create_ex(list, addr, addr_len, addr_type, global); } static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr, @@ -377,6 +386,34 @@ EXPORT_SYMBOL(dev_addr_del_multiple); */ /** + * dev_uc_add_excl - Add a global secondary unicast address + * @dev: device + * @addr: address to add + */ +int dev_uc_add_excl(struct net_device *dev, unsigned char *addr) +{ + struct netdev_hw_addr *ha; + int err; + + netif_addr_lock_bh(dev); + list_for_each_entry(ha, &dev->uc.list, list) { + if (!memcmp(ha->addr, addr, dev->addr_len) && + ha->type == NETDEV_HW_ADDR_T_UNICAST) { + err = -EEXIST; + goto out; + } + } + err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, + NETDEV_HW_ADDR_T_UNICAST, true); + if (!err) + __dev_set_rx_mode(dev); +out: + netif_addr_unlock_bh(dev); + return err; +} +EXPORT_SYMBOL(dev_uc_add_excl); + +/** * dev_uc_add - Add a secondary unicast address * @dev: device * @addr: address to add @@ -501,6 +538,34 @@ EXPORT_SYMBOL(dev_uc_init); * Multicast list handling functions */ +/** + * dev_mc_add_excl - Add a global secondary multicast address + * @dev: device + * @addr: address to add + */ +int dev_mc_add_excl(struct net_device *dev, unsigned char *addr) +{ + struct netdev_hw_addr *ha; + int err; + + netif_addr_lock_bh(dev); + list_for_each_entry(ha, &dev->mc.list, list) { + if (!memcmp(ha->addr, addr, dev->addr_len) && + ha->type == NETDEV_HW_ADDR_T_MULTICAST) { + err = -EEXIST; + goto out; + } + } + err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, + NETDEV_HW_ADDR_T_MULTICAST, true); + if (!err) + __dev_set_rx_mode(dev); +out: + netif_addr_unlock_bh(dev); + return err; +} +EXPORT_SYMBOL(dev_mc_add_excl); + static int __dev_mc_add(struct net_device *dev, unsigned char *addr, bool global) { |