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vrf: remove slave queue and private slave struct

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The private slave queue and slave struct haven't been used for anything
and aren't needed, this allows to reduce memory usage and simplify
enslave/release. We can use netdev_for_each_lower_dev() to free the vrf
ports when deleting a vrf device. Also if in the future a private struct
is needed for each slave, it can be implemented via lower devices'
private member (similar to how bonding does it).

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2015-11-24 14:29:16 +01:00 committed by David S. Miller
parent 54f1aa2e57
commit bad5316232
1 changed files with 5 additions and 63 deletions
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68
drivers/net/vrf.c
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@ -46,17 +46,7 @@
#define vrf_master_get_rcu(dev) \
((struct net_device *)rcu_dereference(dev->rx_handler_data))
struct slave {
struct list_head list;
struct net_device *dev;
};
struct slave_queue {
struct list_head all_slaves;
};
struct net_vrf {
struct slave_queue queue;
struct rtable *rth;
struct rt6_info *rt6;
u32 tb_id;
@ -621,42 +611,9 @@ static void cycle_netdev(struct net_device *dev)
}
}
static struct slave *__vrf_find_slave_dev(struct slave_queue *queue,
struct net_device *dev)
{
struct list_head *head = &queue->all_slaves;
struct slave *slave;
list_for_each_entry(slave, head, list) {
if (slave->dev == dev)
return slave;
}
return NULL;
}
/* inverse of __vrf_insert_slave */
static void __vrf_remove_slave(struct slave_queue *queue, struct slave *slave)
{
list_del(&slave->list);
}
static void __vrf_insert_slave(struct slave_queue *queue, struct slave *slave)
{
list_add(&slave->list, &queue->all_slaves);
}
static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
{
struct slave *slave = kzalloc(sizeof(*slave), GFP_KERNEL);
struct net_vrf *vrf = netdev_priv(dev);
struct slave_queue *queue = &vrf->queue;
int ret = -ENOMEM;
if (!slave)
goto out_fail;
slave->dev = port_dev;
int ret;
/* register the packet handler for slave ports */
ret = netdev_rx_handler_register(port_dev, vrf_handle_frame, dev);
@ -672,7 +629,6 @@ static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
goto out_unregister;
port_dev->priv_flags |= IFF_L3MDEV_SLAVE;
__vrf_insert_slave(queue, slave);
cycle_netdev(port_dev);
return 0;
@ -680,7 +636,6 @@ static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
out_unregister:
netdev_rx_handler_unregister(port_dev);
out_fail:
kfree(slave);
return ret;
}
@ -695,10 +650,6 @@ static int vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
/* inverse of do_vrf_add_slave */
static int do_vrf_del_slave(struct net_device *dev, struct net_device *port_dev)
{
struct net_vrf *vrf = netdev_priv(dev);
struct slave_queue *queue = &vrf->queue;
struct slave *slave;
netdev_upper_dev_unlink(port_dev, dev);
port_dev->priv_flags &= ~IFF_L3MDEV_SLAVE;
@ -706,12 +657,6 @@ static int do_vrf_del_slave(struct net_device *dev, struct net_device *port_dev)
cycle_netdev(port_dev);
slave = __vrf_find_slave_dev(queue, port_dev);
if (slave)
__vrf_remove_slave(queue, slave);
kfree(slave);
return 0;
}
@ -723,15 +668,14 @@ static int vrf_del_slave(struct net_device *dev, struct net_device *port_dev)
static void vrf_dev_uninit(struct net_device *dev)
{
struct net_vrf *vrf = netdev_priv(dev);
struct slave_queue *queue = &vrf->queue;
struct list_head *head = &queue->all_slaves;
struct slave *slave, *next;
struct net_device *port_dev;
struct list_head *iter;
vrf_rtable_destroy(vrf);
vrf_rt6_destroy(vrf);
list_for_each_entry_safe(slave, next, head, list)
vrf_del_slave(dev, slave->dev);
netdev_for_each_lower_dev(dev, port_dev, iter)
vrf_del_slave(dev, port_dev);
free_percpu(dev->dstats);
dev->dstats = NULL;
@ -741,8 +685,6 @@ static int vrf_dev_init(struct net_device *dev)
{
struct net_vrf *vrf = netdev_priv(dev);
INIT_LIST_HEAD(&vrf->queue.all_slaves);
dev->dstats = netdev_alloc_pcpu_stats(struct pcpu_dstats);
if (!dev->dstats)
goto out_nomem;