From bad531623253d1e1fb8d140bdc3a077216fd0c5a Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Tue, 24 Nov 2015 14:29:16 +0100 Subject: [PATCH] vrf: remove slave queue and private slave struct 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 Signed-off-by: David S. Miller --- drivers/net/vrf.c | 68 ++++------------------------------------------- 1 file changed, 5 insertions(+), 63 deletions(-) diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 92fa3e1ea65c..c2d54c4ed556 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -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; -- 2.39.5