This adds a dev_uc_add_excl() call similar to the original dev_uc_add() except it sets the global bit. With this change the reference count will not be bumped and -EEXIST will be returned if a duplicate address exists.
This is useful for drivers that support SR-IOV and want to manage the unicast lists. Signed-off-by: John Fastabend <[email protected]> --- include/linux/netdevice.h | 1 + net/core/dev_addr_lists.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+), 0 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 3963992..7e4a86f 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2553,6 +2553,7 @@ 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); diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c index 29c07fe..c7d27ad 100644 --- a/net/core/dev_addr_lists.c +++ b/net/core/dev_addr_lists.c @@ -377,6 +377,25 @@ 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) +{ + int err; + + netif_addr_lock_bh(dev); + err = __hw_addr_add_ex(&dev->uc, addr, dev->addr_len, + NETDEV_HW_ADDR_T_UNICAST, true); + if (!err) + __dev_set_rx_mode(dev); + 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
