On Sat, 2010-09-25 at 12:27 +0800, xiaohui@intel.com wrote:
From: Xin Xiaohui xiaohui@intel.com
Signed-off-by: Xin Xiaohui xiaohui@intel.com
Signed-off-by: Zhao Yu yzhao81...@gmail.com
Reviewed-by: Jeff Dike jd...@linux.intel.com
---
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).
That belongs in the commit message.
+ * 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.
Who sets which fields in this structure? Can you make this a kernel-doc
comment specifying the use of each field?
Ben.
+ */
+struct mpassthru_port{
+ int hdr_len;
+ int data_len;
+ int npages;
+ unsignedflags;
+ 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 */
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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