[PATCH v11 02/17] Add a new struct for device to manipulate external buffer.
From: <hidden>
Date: 2010-09-25 04:15:04
Also in:
kvm, lkml
Subsystem:
networking drivers, networking [general], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Xin Xiaohui <redacted> Signed-off-by: Xin Xiaohui <redacted> Signed-off-by: Zhao Yu <redacted> Reviewed-by: Jeff Dike <redacted> --- include/linux/netdevice.h | 22 +++++++++++++++++++++- 1 files changed, 21 insertions(+), 1 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index fa8b476..ba582e1 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h@@ -530,6 +530,25 @@ struct netdev_queue { unsigned long tx_dropped; } ____cacheline_aligned_in_smp; +/* Add a structure in structure net_device, the new field is + * named as mp_port. It's for mediate passthru (zero-copy). + * It contains the capability for the net device driver, + * a socket, and an external buffer creator, external means + * skb buffer belongs to the device may not be allocated from + * kernel space. + */ +struct mpassthru_port { + int hdr_len; + int data_len; + int npages; + unsigned flags; + struct socket *sock; + int vnet_hlen; + struct skb_ext_page *(*ctor)(struct mpassthru_port *, + struct sk_buff *, int); + struct skb_ext_page *(*hash)(struct net_device *, + struct page *); +}; /* * This structure defines the management hooks for network devices.
@@ -952,7 +971,8 @@ struct net_device { struct macvlan_port *macvlan_port; /* GARP */ struct garp_port *garp_port; - + /* mpassthru */ + struct mpassthru_port *mp_port; /* class/net/name entry */ struct device dev; /* space for optional device, statistics, and wireless sysfs groups */
--
1.7.3