From mboxrd@z Thu Jan 1 00:00:00 1970 From: Veaceslav Falico Subject: [PATCH RFC net-next 18/21] net: add a function to get the next/prev private Date: Mon, 2 Sep 2013 23:39:22 +0200 Message-ID: <1378157965-17537-19-git-send-email-vfalico@redhat.com> References: <1378157965-17537-1-git-send-email-vfalico@redhat.com> Cc: Veaceslav Falico , "David S. Miller" , Eric Dumazet , Jiri Pirko , Alexander Duyck To: netdev@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44574 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932259Ab3IBVji (ORCPT ); Mon, 2 Sep 2013 17:39:38 -0400 In-Reply-To: <1378157965-17537-1-git-send-email-vfalico@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: The boolean flag specifies which direction to go. CC: "David S. Miller" CC: Eric Dumazet CC: Jiri Pirko CC: Alexander Duyck Signed-off-by: Veaceslav Falico --- include/linux/netdevice.h | 2 ++ net/core/dev.c | 24 ++++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index bde2244..a112ccc 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2835,6 +2835,8 @@ extern void *netdev_lower_dev_get_private_rcu(struct net_device *dev, struct net_device *lower_dev); extern void *netdev_lower_dev_get_private(struct net_device *dev, struct net_device *lower_dev); +extern void *netdev_lower_dev_get_next_private(struct net_device *dev, + void *private, bool prev); extern int skb_checksum_help(struct sk_buff *skb); extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb, netdev_features_t features, bool tx_path); diff --git a/net/core/dev.c b/net/core/dev.c index 6df11a0..c694059 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5163,6 +5163,30 @@ void *netdev_lower_dev_get_private(struct net_device *dev, } EXPORT_SYMBOL(netdev_lower_dev_get_private); +extern void *netdev_lower_dev_get_next_private(struct net_device *dev, + void *private, bool prev) +{ + struct netdev_adjacent *lower; + + list_for_each_entry(lower, &dev->neighbour_dev_list.lower, list) + if (lower->private == private) + break; + + if (&lower->list == &dev->neighbour_dev_list.lower) + return NULL; + + lower = prev ? list_entry(lower->list.prev, struct netdev_adjacent, list) : + list_entry(lower->list.next, struct netdev_adjacent, list); + if (&lower->list != &dev->neighbour_dev_list.lower) + return lower->private; + + lower = prev ? list_entry(lower->list.prev, struct netdev_adjacent, list) : + list_entry(lower->list.next, struct netdev_adjacent, list); + + return lower->private; +} +EXPORT_SYMBOL(netdev_lower_dev_get_next_private); + static void dev_change_rx_flags(struct net_device *dev, int flags) { const struct net_device_ops *ops = dev->netdev_ops; -- 1.8.4