netdev - [RFC PATCH 11/24] netdevice: added ndo for transmitting a packet from an XDP socket

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Date:   Wed, 31 Jan 2018 14:53:43 +0100
From:   Björn Töpel <bjorn.topel@...il.com>
To:     bjorn.topel@...il.com, magnus.karlsson@...el.com,
        alexander.h.duyck@...el.com, alexander.duyck@...il.com,
        john.fastabend@...il.com, ast@...com, brouer@...hat.com,
        willemdebruijn.kernel@...il.com, daniel@...earbox.net,
        netdev@...r.kernel.org
Cc:     michael.lundkvist@...csson.com, jesse.brandeburg@...el.com,
        anjali.singhai@...el.com, jeffrey.b.shaw@...el.com,
        ferruh.yigit@...el.com, qi.z.zhang@...el.com
Subject: [RFC PATCH 11/24] netdevice: added ndo for transmitting a packet from an XDP socket

From: Magnus Karlsson <magnus.karlsson@...el.com>

Only used when a zero copy allocator is used.

Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
---
 include/linux/netdevice.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index a997649dd5cc..2b196fa8db6a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1178,6 +1178,9 @@ struct dev_ifalias {
  * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_buff *xdp);
  *	This function is used to submit a XDP packet for transmit on a
  *	netdevice.
+ * int	(*ndo_xdp_xmit_xsk)(struct net_device *dev, u32 queue_id);
+ *      This function is used to transmit a packet from an XDP socket
+ *      when a zero copy allocator is used.
  * void (*ndo_xdp_flush)(struct net_device *dev);
  *	This function is used to inform the driver to flush a particular
  *	xdp tx queue. Must be called on same CPU as xdp_xmit.
@@ -1367,6 +1370,8 @@ struct net_device_ops {
 					   struct netdev_bpf *bpf);
 	int			(*ndo_xdp_xmit)(struct net_device *dev,
 						struct xdp_buff *xdp);
+	int			(*ndo_xdp_xmit_xsk)(struct net_device *dev,
+						    u32 queue_id);
 	void			(*ndo_xdp_flush)(struct net_device *dev);
 };
 
-- 
2.14.1