Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753510Ab0DYJRk (ORCPT ); Sun, 25 Apr 2010 05:17:40 -0400 Received: from mga01.intel.com ([192.55.52.88]:24216 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751918Ab0DYJQw (ORCPT ); Sun, 25 Apr 2010 05:16:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.52,269,1270450800"; d="scan'208";a="561295799" From: xiaohui.xin@intel.com To: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, jdike@linux.intel.com Cc: Xin Xiaohui Subject: [RFC][PATCH v4 02/18] Export 2 func for device to assign/dassign new structure. Date: Sun, 25 Apr 2010 17:19:49 +0800 Message-Id: <1272187206-18534-2-git-send-email-xiaohui.xin@intel.com> X-Mailer: git-send-email 1.5.4.4 In-Reply-To: <1272187206-18534-1-git-send-email-xiaohui.xin@intel.com> References: <1272187206-18534-1-git-send-email-xiaohui.xin@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2185 Lines: 73 From: Xin Xiaohui Export 2 func for device to assign/deassign new strucure Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- include/linux/netdevice.h | 3 +++ net/core/dev.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 0 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index bf79756..5c473fb 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1592,6 +1592,9 @@ extern gro_result_t napi_frags_finish(struct napi_struct *napi, gro_result_t ret); extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); extern gro_result_t napi_gro_frags(struct napi_struct *napi); +extern int netdev_mp_port_attach(struct net_device *dev, + struct mpassthru_port *port); +extern void netdev_mp_port_detach(struct net_device *dev); static inline void napi_free_frags(struct napi_struct *napi) { diff --git a/net/core/dev.c b/net/core/dev.c index e5972f7..6a73fc7 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2464,6 +2464,34 @@ void netif_nit_deliver(struct sk_buff *skb) rcu_read_unlock(); } +/* Export two functions to assign/de-assign mp_port pointer + * to a net device. + */ + +int netdev_mp_port_attach(struct net_device *dev, + struct mpassthru_port *port) +{ + /* locked by mp_mutex */ + if (rcu_dereference(dev->mp_port)) + return -EBUSY; + + rcu_assign_pointer(dev->mp_port, port); + + return 0; +} +EXPORT_SYMBOL(netdev_mp_port_attach); + +void netdev_mp_port_detach(struct net_device *dev) +{ + /* locked by mp_mutex */ + if (!rcu_dereference(dev->mp_port)) + return; + + rcu_assign_pointer(dev->mp_port, NULL); + synchronize_rcu(); +} +EXPORT_SYMBOL(netdev_mp_port_detach); + /** * netif_receive_skb - process receive buffer from network * @skb: buffer to process -- 1.5.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/