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net: introduce iterators over synced hw addresses

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Some network drivers use __dev_mc_sync()/__dev_uc_sync() and therefore
program the hardware only with addresses with a non-zero sync_cnt.

Some of the above drivers also need to save/restore the address
filtering lists when certain events happen, and they need to walk
through the struct net_device :: uc and struct net_device :: mc lists.
But these lists contain unsynced addresses too.

To keep the appearance of an elementary form of data encapsulation,
provide iterators through these lists that only look at entries with a
non-zero sync_cnt, instead of filtering entries out from device drivers.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Vladimir Oltean 2022-09-11 04:06:57 +03:00 committed by Paolo Abeni
parent 42e53b447c
commit db01868bf2
1 changed files with 6 additions and 0 deletions
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6
include/linux/netdevice.h
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@ -253,11 +253,17 @@ struct netdev_hw_addr_list {
#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
#define netdev_for_each_uc_addr(ha, dev) \
netdev_hw_addr_list_for_each(ha, &(dev)->uc)
#define netdev_for_each_synced_uc_addr(_ha, _dev) \
netdev_for_each_uc_addr((_ha), (_dev)) \
if ((_ha)->sync_cnt)
#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
#define netdev_for_each_mc_addr(ha, dev) \
netdev_hw_addr_list_for_each(ha, &(dev)->mc)
#define netdev_for_each_synced_mc_addr(_ha, _dev) \
netdev_for_each_mc_addr((_ha), (_dev)) \
if ((_ha)->sync_cnt)
struct hh_cache {
unsigned int hh_len;