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 <xiaohui.xin@intel.com>
Subject: [RFC][PATCH v6 03/19] Export 2 func for device to assign/deassign new strucure
Date: Fri, 21 May 2010 17:30:19 +0800 [thread overview]
Message-ID: <1274434235-5929-4-git-send-email-xiaohui.xin@intel.com> (raw)
In-Reply-To: <1274434235-5929-3-git-send-email-xiaohui.xin@intel.com>
From: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Zhao Yu <yzhao81new@gmail.com>
Reviewed-by: Jeff Dike <jdike@linux.intel.com>
---
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 bae725c..efb575a 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 f769098..ecbb6b1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2469,6 +2469,34 @@ 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
next prev parent reply other threads:[~2010-05-21 9:30 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-21 9:30 [RFC][PATCH v6 00/19] Provide a zero-copy method on KVM virtio-net xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 01/19] Add a new structure for skb buffer from external xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 02/19] Add a new struct for device to manipulate external buffer xiaohui.xin
2010-05-21 9:30 ` xiaohui.xin [this message]
2010-05-21 9:30 ` [RFC][PATCH v6 04/19] Add a ndo_mp_port_prep pointer to net_device_ops xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 05/19] Add a function make external buffer owner to query capability xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 06/19] Add a function to indicate if device use external buffer xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 07/19] Add interface to get external buffers xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 08/19] Make __alloc_skb() to get external buffer xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 09/19] Ignore room skb_reserve() when device is using " xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 10/19] Don't do skb recycle, if device use " xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 11/19] Use callback to deal with skb_release_data() specially xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 12/19] Add a hook to intercept external buffers from NIC driver xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 13/19] To skip GRO if buffer is external currently xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 14/19] Add header file for mp device xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 15/19] Add basic funcs and ioctl to " xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 16/19] Manipulate external buffers in " xiaohui.xin
2010-05-21 9:30 ` [PATCH v6 17/19] Export proto_ops to vhost-net driver xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 18/19] Add a kconfig entry and make entry for mp device xiaohui.xin
2010-05-21 9:30 ` [RFC][PATCH v6 19/19] Provides multiple submits and asynchronous notifications xiaohui.xin
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