[RFC][PATCH v4 02/18] Export 2 func for device to assign/dassign new structure.
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From: xiaohui.xin on 25 Apr 2010 05:30 From: Xin Xiaohui <xiaohui.xin(a)intel.com> Export 2 func for device to assign/deassign new strucure Signed-off-by: Xin Xiaohui <xiaohui.xin(a)intel.com> Signed-off-by: Zhao Yu <yzhao81(a)gmail.com> Reviewed-by: Jeff Dike <jdike(a)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 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(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |