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 <john.r.fastabend@xxxxxxxxx>
---
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 4208901..5e43cec 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2571,6 +2571,7 @@ 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
--
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