From: Xin Xiaohui <[email protected]> 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.
Signed-off-by: Xin Xiaohui <[email protected]> Signed-off-by: Zhao Yu <[email protected]> Reviewed-by: Jeff Dike <[email protected]> --- include/linux/netdevice.h | 25 ++++++++++++++++++++++++- 1 files changed, 24 insertions(+), 1 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index fa8b476..9ef9bf1 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -530,6 +530,28 @@ struct netdev_queue { unsigned long tx_dropped; } ____cacheline_aligned_in_smp; +/*The structure for mediate passthru(zero-copy). */ +struct mp_port { + /* the header len */ + int hdr_len; + /* the max payload len for one descriptor */ + int data_len; + /* the pages for DMA in one time */ + int npages; + /* the socket bind to */ + struct socket *sock; + /* the header len for virtio-net */ + int vnet_hlen; + /* the external buffer page creator */ + struct skb_ext_page *(*ctor)(struct mp_port *, + struct sk_buff *, int); + /* the hash function attached to find according + * backend ring descriptor info for one external + * buffer page. + */ + struct skb_ext_page *(*hash)(struct net_device *, + struct page *); +}; /* * This structure defines the management hooks for network devices. @@ -952,7 +974,8 @@ struct net_device { struct macvlan_port *macvlan_port; /* GARP */ struct garp_port *garp_port; - + /* mpassthru */ + struct mp_port *mp_port; /* class/net/name entry */ struct device dev; /* space for optional device, statistics, and wireless sysfs groups */ -- 1.7.3 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
