From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shirley Ma Subject: [RFC PATCH V2 2/5] Add a new device flag for zero copy Date: Fri, 10 Dec 2010 01:57:55 -0800 Message-ID: <1291975075.2167.31.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: xiaohui.xin@intel.com, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org To: Avi Kivity , Arnd Bergmann , mst@redhat.com Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Signed-off-by: Shirley Ma --- include/linux/netdevice.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index d8fd2c2..7207665 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -857,6 +857,9 @@ struct net_device { #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ +/* bit 29 is for device to map userspace buffers -- zerocopy */ +#define NETIF_F_ZEROCOPY (1 << 29) + /* Segmentation offload features */ #define NETIF_F_GSO_SHIFT 16 #define NETIF_F_GSO_MASK 0x00ff0000