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Merge branch 'netdevsync'

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Alexander Duyck says:

====================
Provide common means for device address sync

The following series implements a means for synchronizing both unicast and
multicast addresses on a device interface.  The code is based on the original
implementation of dev_uc_sync that was available for syncing a VLAN to the
lower dev.

The original reason for coming up for this patch is a driver that is still in
the early stages of development.  The nearest driver I could find that
appeared to have the same limitations as the driver I was working on was the
Cisco enic driver.  For this reason I chose it as the first driver to make use
of this interface publicly.

However, I do not have a Cisco enic interface so I have only been able to
compile test any changes made to the driver.  I tried to keep this change as
simple as possible to avoid any issues.  Any help with testing would be
greatly appreciated.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2014-06-02 10:41:30 -07:00
commit c7bfbe51d5
8 changed files with 231 additions and 118 deletions
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2
drivers/net/ethernet/cisco/enic/enic.h
View File

@ -114,8 +114,6 @@ struct enic {
u32 msg_enable;
spinlock_t devcmd_lock;
u8 mac_addr[ETH_ALEN];
u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
unsigned int flags;
unsigned int priv_flags;
unsigned int mc_count;

4
drivers/net/ethernet/cisco/enic/enic_dev.c
View File

@ -88,7 +88,7 @@ int enic_dev_packet_filter(struct enic *enic, int directed, int multicast,
return err;
}
int enic_dev_add_addr(struct enic *enic, u8 *addr)
int enic_dev_add_addr(struct enic *enic, const u8 *addr)
{
int err;
@ -99,7 +99,7 @@ int enic_dev_add_addr(struct enic *enic, u8 *addr)
return err;
}
int enic_dev_del_addr(struct enic *enic, u8 *addr)
int enic_dev_del_addr(struct enic *enic, const u8 *addr)
{
int err;

4
drivers/net/ethernet/cisco/enic/enic_dev.h
View File

@ -45,8 +45,8 @@ int enic_dev_add_station_addr(struct enic *enic);
int enic_dev_del_station_addr(struct enic *enic);
int enic_dev_packet_filter(struct enic *enic, int directed, int multicast,
int broadcast, int promisc, int allmulti);
int enic_dev_add_addr(struct enic *enic, u8 *addr);
int enic_dev_del_addr(struct enic *enic, u8 *addr);
int enic_dev_add_addr(struct enic *enic, const u8 *addr);
int enic_dev_del_addr(struct enic *enic, const u8 *addr);
int enic_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid);
int enic_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid);
int enic_dev_notify_unset(struct enic *enic);

173
drivers/net/ethernet/cisco/enic/enic_main.c
View File

@ -616,8 +616,71 @@ static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
return net_stats;
}
static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
{
struct enic *enic = netdev_priv(netdev);
if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
unsigned int mc_count = netdev_mc_count(netdev);
netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
return -ENOSPC;
}
enic_dev_add_addr(enic, mc_addr);
enic->mc_count++;
return 0;
}
static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
{
struct enic *enic = netdev_priv(netdev);
enic_dev_del_addr(enic, mc_addr);
enic->mc_count--;
return 0;
}
static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
{
struct enic *enic = netdev_priv(netdev);
if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
unsigned int uc_count = netdev_uc_count(netdev);
netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
ENIC_UNICAST_PERFECT_FILTERS, uc_count);
return -ENOSPC;
}
enic_dev_add_addr(enic, uc_addr);
enic->uc_count++;
return 0;
}
static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
{
struct enic *enic = netdev_priv(netdev);
enic_dev_del_addr(enic, uc_addr);
enic->uc_count--;
return 0;
}
void enic_reset_addr_lists(struct enic *enic)
{
struct net_device *netdev = enic->netdev;
__dev_uc_unsync(netdev, NULL);
__dev_mc_unsync(netdev, NULL);
enic->mc_count = 0;
enic->uc_count = 0;
enic->flags = 0;
@ -684,112 +747,6 @@ static int enic_set_mac_address(struct net_device *netdev, void *p)
return enic_dev_add_station_addr(enic);
}
static void enic_update_multicast_addr_list(struct enic *enic)
{
struct net_device *netdev = enic->netdev;
struct netdev_hw_addr *ha;
unsigned int mc_count = netdev_mc_count(netdev);
u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
unsigned int i, j;
if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
netdev_warn(netdev, "Registering only %d out of %d "
"multicast addresses\n",
ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
}
/* Is there an easier way? Trying to minimize to
* calls to add/del multicast addrs. We keep the
* addrs from the last call in enic->mc_addr and
* look for changes to add/del.
*/
i = 0;
netdev_for_each_mc_addr(ha, netdev) {
if (i == mc_count)
break;
memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
}
for (i = 0; i < enic->mc_count; i++) {
for (j = 0; j < mc_count; j++)
if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
break;
if (j == mc_count)
enic_dev_del_addr(enic, enic->mc_addr[i]);
}
for (i = 0; i < mc_count; i++) {
for (j = 0; j < enic->mc_count; j++)
if (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
break;
if (j == enic->mc_count)
enic_dev_add_addr(enic, mc_addr[i]);
}
/* Save the list to compare against next time
*/
for (i = 0; i < mc_count; i++)
memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
enic->mc_count = mc_count;
}
static void enic_update_unicast_addr_list(struct enic *enic)
{
struct net_device *netdev = enic->netdev;
struct netdev_hw_addr *ha;
unsigned int uc_count = netdev_uc_count(netdev);
u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
unsigned int i, j;
if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
netdev_warn(netdev, "Registering only %d out of %d "
"unicast addresses\n",
ENIC_UNICAST_PERFECT_FILTERS, uc_count);
uc_count = ENIC_UNICAST_PERFECT_FILTERS;
}
/* Is there an easier way? Trying to minimize to
* calls to add/del unicast addrs. We keep the
* addrs from the last call in enic->uc_addr and
* look for changes to add/del.
*/
i = 0;
netdev_for_each_uc_addr(ha, netdev) {
if (i == uc_count)
break;
memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
}
for (i = 0; i < enic->uc_count; i++) {
for (j = 0; j < uc_count; j++)
if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
break;
if (j == uc_count)
enic_dev_del_addr(enic, enic->uc_addr[i]);
}
for (i = 0; i < uc_count; i++) {
for (j = 0; j < enic->uc_count; j++)
if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
break;
if (j == enic->uc_count)
enic_dev_add_addr(enic, uc_addr[i]);
}
/* Save the list to compare against next time
*/
for (i = 0; i < uc_count; i++)
memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
enic->uc_count = uc_count;
}
/* netif_tx_lock held, BHs disabled */
static void enic_set_rx_mode(struct net_device *netdev)
{
@ -812,9 +769,9 @@ static void enic_set_rx_mode(struct net_device *netdev)
}
if (!promisc) {
enic_update_unicast_addr_list(enic);
__dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
if (!allmulti)
enic_update_multicast_addr_list(enic);
__dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
}
}

4
drivers/net/ethernet/cisco/enic/vnic_dev.c
View File

@ -657,7 +657,7 @@ int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
return err;
}
int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr)
{
u64 a0 = 0, a1 = 0;
int wait = 1000;
@ -674,7 +674,7 @@ int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
return err;
}
int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr)
{
u64 a0 = 0, a1 = 0;
int wait = 1000;

4
drivers/net/ethernet/cisco/enic/vnic_dev.h
View File

@ -95,8 +95,8 @@ int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
int vnic_dev_hang_notify(struct vnic_dev *vdev);
int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
int broadcast, int promisc, int allmulti);
int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
int vnic_dev_add_addr(struct vnic_dev *vdev, const u8 *addr);
int vnic_dev_del_addr(struct vnic_dev *vdev, const u8 *addr);
int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
int vnic_dev_notify_unset(struct vnic_dev *vdev);

73
include/linux/netdevice.h
View File

@ -3003,6 +3003,15 @@ int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list, int addr_len);
void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
struct netdev_hw_addr_list *from_list, int addr_len);
int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
struct net_device *dev,
int (*sync)(struct net_device *, const unsigned char *),
int (*unsync)(struct net_device *,
const unsigned char *));
void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
struct net_device *dev,
int (*unsync)(struct net_device *,
const unsigned char *));
void __hw_addr_init(struct netdev_hw_addr_list *list);
/* Functions used for device addresses handling */
@ -3023,6 +3032,38 @@ void dev_uc_unsync(struct net_device *to, struct net_device *from);
void dev_uc_flush(struct net_device *dev);
void dev_uc_init(struct net_device *dev);
/**
* __dev_uc_sync - Synchonize device's unicast list
* @dev: device to sync
* @sync: function to call if address should be added
* @unsync: function to call if address should be removed
*
* Add newly added addresses to the interface, and release
* addresses that have been deleted.
**/
static inline int __dev_uc_sync(struct net_device *dev,
int (*sync)(struct net_device *,
const unsigned char *),
int (*unsync)(struct net_device *,
const unsigned char *))
{
return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
}
/**
* __dev_uc_unsync - Remove synchonized addresses from device
* @dev: device to sync
* @unsync: function to call if address should be removed
*
* Remove all addresses that were added to the device by dev_uc_sync().
**/
static inline void __dev_uc_unsync(struct net_device *dev,
int (*unsync)(struct net_device *,
const unsigned char *))
{
__hw_addr_unsync_dev(&dev->uc, dev, unsync);
}
/* Functions used for multicast addresses handling */
int dev_mc_add(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
@ -3035,6 +3076,38 @@ void dev_mc_unsync(struct net_device *to, struct net_device *from);
void dev_mc_flush(struct net_device *dev);
void dev_mc_init(struct net_device *dev);
/**
* __dev_mc_sync - Synchonize device's multicast list
* @dev: device to sync
* @sync: function to call if address should be added
* @unsync: function to call if address should be removed
*
* Add newly added addresses to the interface, and release
* addresses that have been deleted.
**/
static inline int __dev_mc_sync(struct net_device *dev,
int (*sync)(struct net_device *,
const unsigned char *),
int (*unsync)(struct net_device *,
const unsigned char *))
{
return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
}
/**
* __dev_mc_unsync - Remove synchonized addresses from device
* @dev: device to sync
* @unsync: function to call if address should be removed
*
* Remove all addresses that were added to the device by dev_mc_sync().
**/
static inline void __dev_mc_unsync(struct net_device *dev,
int (*unsync)(struct net_device *,
const unsigned char *))
{
__hw_addr_unsync_dev(&dev->mc, dev, unsync);
}
/* Functions used for secondary unicast and multicast support */
void dev_set_rx_mode(struct net_device *dev);
void __dev_set_rx_mode(struct net_device *dev);

85
net/core/dev_addr_lists.c
View File

@ -225,6 +225,91 @@ void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
}
EXPORT_SYMBOL(__hw_addr_unsync);
/**
* __hw_addr_sync_dev - Synchonize device's multicast list
* @list: address list to syncronize
* @dev: device to sync
* @sync: function to call if address should be added
* @unsync: function to call if address should be removed
*
* This funciton is intended to be called from the ndo_set_rx_mode
* function of devices that require explicit address add/remove
* notifications. The unsync function may be NULL in which case
* the addresses requiring removal will simply be removed without
* any notification to the device.
**/
int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
struct net_device *dev,
int (*sync)(struct net_device *, const unsigned char *),
int (*unsync)(struct net_device *,
const unsigned char *))
{
struct netdev_hw_addr *ha, *tmp;
int err;
/* first go through and flush out any stale entries */
list_for_each_entry_safe(ha, tmp, &list->list, list) {
if (!ha->sync_cnt || ha->refcount != 1)
continue;
/* if unsync is defined and fails defer unsyncing address */
if (unsync && unsync(dev, ha->addr))
continue;
ha->sync_cnt--;
__hw_addr_del_entry(list, ha, false, false);
}
/* go through and sync new entries to the list */
list_for_each_entry_safe(ha, tmp, &list->list, list) {
if (ha->sync_cnt)
continue;
err = sync(dev, ha->addr);
if (err)
return err;
ha->sync_cnt++;
ha->refcount++;
}
return 0;
}
EXPORT_SYMBOL(__hw_addr_sync_dev);
/**
* __hw_addr_unsync_dev - Remove synchonized addresses from device
* @list: address list to remove syncronized addresses from
* @dev: device to sync
* @unsync: function to call if address should be removed
*
* Remove all addresses that were added to the device by __hw_addr_sync_dev().
* This function is intended to be called from the ndo_stop or ndo_open
* functions on devices that require explicit address add/remove
* notifications. If the unsync function pointer is NULL then this function
* can be used to just reset the sync_cnt for the addresses in the list.
**/
void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
struct net_device *dev,
int (*unsync)(struct net_device *,
const unsigned char *))
{
struct netdev_hw_addr *ha, *tmp;
list_for_each_entry_safe(ha, tmp, &list->list, list) {
if (!ha->sync_cnt)
continue;
/* if unsync is defined and fails defer unsyncing address */
if (unsync && unsync(dev, ha->addr))
continue;
ha->sync_cnt--;
__hw_addr_del_entry(list, ha, false, false);
}
}
EXPORT_SYMBOL(__hw_addr_unsync_dev);
static void __hw_addr_flush(struct netdev_hw_addr_list *list)
{
struct netdev_hw_addr *ha, *tmp;