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net: add dev_uc_sync_multiple() and dev_mc_sync_multiple() api

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The current implementation of dev_uc_sync/unsync() assumes that there is
a strict 1-to-1 relationship between the source and destination of the sync.
In other words, once an address has been synced to a destination device, it
will not be synced to any other device through the sync API.
However, there are some virtual devices that aggreate a number of lower
devices and need to sync addresses to all of them.  The current
API falls short there.

This patch introduces a new dev_uc_sync_multiple() api that can be called
in the above circumstances and allows sync to work for every invocation.

CC: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich
2013-04-15 09:54:25 +00:00
committed by David S. Miller
parent 0022d2dd4d
commit 4cd729b042
2 changed files with 171 additions and 42 deletions
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3
include/linux/netdevice.h
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@@ -209,6 +209,7 @@ struct netdev_hw_addr {
#define NETDEV_HW_ADDR_T_UNICAST 4
#define NETDEV_HW_ADDR_T_MULTICAST 5
bool global_use;
int sync_cnt;
int refcount;
int synced;
struct rcu_head rcu_head;
@@ -2627,6 +2628,7 @@ extern int dev_uc_add(struct net_device *dev, const unsigned char *addr);
extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
extern int dev_uc_del(struct net_device *dev, const unsigned char *addr);
extern int dev_uc_sync(struct net_device *to, struct net_device *from);
extern int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
extern void dev_uc_flush(struct net_device *dev);
extern void dev_uc_init(struct net_device *dev);
@@ -2638,6 +2640,7 @@ extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_del(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_sync(struct net_device *to, struct net_device *from);
extern int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
extern void dev_mc_flush(struct net_device *dev);
extern void dev_mc_init(struct net_device *dev);