From 57b61127ab7da18e612a5cd26783a5103b1c6385 Mon Sep 17 00:00:00 2001 From: Haishuang Yan Date: Sat, 16 Dec 2017 17:54:49 +0800 Subject: [PATCH 1/2] vxlan: speedup vxlan tunnels dismantle Since we now hold RTNL lock in vxlan_exit_net, it's better to batch them to speedup vxlan tunnels dismantle. Signed-off-by: Haishuang Yan Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 19b9cc51079e..48a0dc238f73 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -3692,18 +3692,16 @@ static __net_init int vxlan_init_net(struct net *net) return 0; } -static void __net_exit vxlan_exit_net(struct net *net) +static void vxlan_destroy_tunnels(struct net *net, struct list_head *head) { struct vxlan_net *vn = net_generic(net, vxlan_net_id); struct vxlan_dev *vxlan, *next; struct net_device *dev, *aux; unsigned int h; - LIST_HEAD(list); - rtnl_lock(); for_each_netdev_safe(net, dev, aux) if (dev->rtnl_link_ops == &vxlan_link_ops) - unregister_netdevice_queue(dev, &list); + unregister_netdevice_queue(dev, head); list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { /* If vxlan->dev is in the same netns, it has already been added @@ -3711,20 +3709,30 @@ static void __net_exit vxlan_exit_net(struct net *net) */ if (!net_eq(dev_net(vxlan->dev), net)) { gro_cells_destroy(&vxlan->gro_cells); - unregister_netdevice_queue(vxlan->dev, &list); + unregister_netdevice_queue(vxlan->dev, head); } } - unregister_netdevice_many(&list); - rtnl_unlock(); - for (h = 0; h < PORT_HASH_SIZE; ++h) WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h])); } +static void __net_exit vxlan_exit_batch_net(struct list_head *net_list) +{ + struct net *net; + LIST_HEAD(list); + + rtnl_lock(); + list_for_each_entry(net, net_list, exit_list) + vxlan_destroy_tunnels(net, &list); + + unregister_netdevice_many(&list); + rtnl_unlock(); +} + static struct pernet_operations vxlan_net_ops = { .init = vxlan_init_net, - .exit = vxlan_exit_net, + .exit_batch = vxlan_exit_batch_net, .id = &vxlan_net_id, .size = sizeof(struct vxlan_net), }; From 2843a25348f8c7e8f0c969d506429d7a2ded186e Mon Sep 17 00:00:00 2001 From: Haishuang Yan Date: Sat, 16 Dec 2017 17:54:50 +0800 Subject: [PATCH 2/2] geneve: speedup geneve tunnels dismantle Since we now hold RTNL lock in geneve_exit_net, it's better batch them to speedup geneve tunnel dismantle. Signed-off-by: Haishuang Yan Signed-off-by: David S. Miller --- drivers/net/geneve.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index b718a02a6bb6..667c44f68dbc 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -1638,19 +1638,16 @@ static __net_init int geneve_init_net(struct net *net) return 0; } -static void __net_exit geneve_exit_net(struct net *net) +static void geneve_destroy_tunnels(struct net *net, struct list_head *head) { struct geneve_net *gn = net_generic(net, geneve_net_id); struct geneve_dev *geneve, *next; struct net_device *dev, *aux; - LIST_HEAD(list); - - rtnl_lock(); /* gather any geneve devices that were moved into this ns */ for_each_netdev_safe(net, dev, aux) if (dev->rtnl_link_ops == &geneve_link_ops) - unregister_netdevice_queue(dev, &list); + unregister_netdevice_queue(dev, head); /* now gather any other geneve devices that were created in this ns */ list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { @@ -1658,18 +1655,29 @@ static void __net_exit geneve_exit_net(struct net *net) * to the list by the previous loop. */ if (!net_eq(dev_net(geneve->dev), net)) - unregister_netdevice_queue(geneve->dev, &list); + unregister_netdevice_queue(geneve->dev, head); } + WARN_ON_ONCE(!list_empty(&gn->sock_list)); +} + +static void __net_exit geneve_exit_batch_net(struct list_head *net_list) +{ + struct net *net; + LIST_HEAD(list); + + rtnl_lock(); + list_for_each_entry(net, net_list, exit_list) + geneve_destroy_tunnels(net, &list); + /* unregister the devices gathered above */ unregister_netdevice_many(&list); rtnl_unlock(); - WARN_ON_ONCE(!list_empty(&gn->sock_list)); } static struct pernet_operations geneve_net_ops = { .init = geneve_init_net, - .exit = geneve_exit_net, + .exit_batch = geneve_exit_batch_net, .id = &geneve_net_id, .size = sizeof(struct geneve_net), };