From patchwork Tue Oct 27 17:06:49 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Dumazet X-Patchwork-Id: 37010 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by ozlabs.org (Postfix) with ESMTP id 2CD89B7BC2 for ; Wed, 28 Oct 2009 04:07:13 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756211AbZJ0RHB (ORCPT ); Tue, 27 Oct 2009 13:07:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756271AbZJ0RHA (ORCPT ); Tue, 27 Oct 2009 13:07:00 -0400 Received: from gw1.cosmosbay.com ([212.99.114.194]:36643 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756267AbZJ0RHA (ORCPT ); Tue, 27 Oct 2009 13:07:00 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) by gw1.cosmosbay.com (8.13.7/8.13.7) with ESMTP id n9RH72Pm026879; Tue, 27 Oct 2009 18:07:03 +0100 Message-ID: <4AE728A9.2080209@gmail.com> Date: Tue, 27 Oct 2009 18:06:49 +0100 From: Eric Dumazet User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: "David S. Miller" CC: Linux Netdev List Subject: [PATCH 4/6] vlan: Optimize multiple unregistration X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [0.0.0.0]); Tue, 27 Oct 2009 18:07:03 +0100 (CET) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Use unregister_netdevice_many() to speedup master device unregister. Signed-off-by: Eric Dumazet --- include/linux/if_vlan.h | 1 net/8021q/vlan.c | 49 +++++++++++++++++++++++++------------- net/core/dev.c | 1 3 files changed, 35 insertions(+), 16 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 8898cbe..71a4870 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -85,6 +85,7 @@ struct vlan_group { * the vlan is attached to. */ unsigned int nr_vlans; + int killall; struct hlist_node hlist; /* linked list */ struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS]; struct rcu_head rcu; diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index 6b5c9dd..511afe7 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -159,11 +159,12 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head) if (real_dev->features & NETIF_F_HW_VLAN_FILTER) ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); - vlan_group_set_device(grp, vlan_id, NULL); grp->nr_vlans--; - synchronize_net(); - + if (!grp->killall) { + vlan_group_set_device(grp, vlan_id, NULL); + synchronize_net(); + } unregister_netdevice_queue(dev, head); /* If the group is now empty, kill off the group. */ @@ -183,6 +184,34 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head) dev_put(real_dev); } +void unregister_vlan_dev_alls(struct vlan_group *grp) +{ + LIST_HEAD(list); + int i; + struct net_device *vlandev; + struct vlan_group save; + + memcpy(&save, grp, sizeof(save)); + memset(&grp->vlan_devices_arrays, 0, sizeof(grp->vlan_devices_arrays)); + grp->killall = 1; + + synchronize_net(); + + /* Delete all VLANs for this dev. */ + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + vlandev = vlan_group_get_device(&save, i); + if (!vlandev) + continue; + + unregister_vlan_dev(vlandev, &list); + if (grp->nr_vlans == 0) + break; + } + unregister_netdevice_many(&list); + for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) + kfree(save.vlan_devices_arrays[i]); +} + static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) { @@ -524,19 +553,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, break; case NETDEV_UNREGISTER: - /* Delete all VLANs for this dev. */ - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { - vlandev = vlan_group_get_device(grp, i); - if (!vlandev) - continue; - - /* unregistration of last vlan destroys group, abort - * afterwards */ - if (grp->nr_vlans == 1) - i = VLAN_GROUP_ARRAY_LEN; - - unregister_vlan_dev(vlandev, NULL); - } + unregister_vlan_dev_alls(grp); break; } diff --git a/net/core/dev.c b/net/core/dev.c index dedacd8..82a3bb9 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5303,6 +5303,7 @@ void unregister_netdevice_many(struct list_head *head) net_set_todo(dev); } } +EXPORT_SYMBOL(unregister_netdevice_many); /** * unregister_netdev - remove device from the kernel