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net: add a new ndo_tunnel_ioctl method

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This method is used to properly allow kernel callers of the IPv4 route
management ioctls.  The exsting ip_tunnel_ioctl helper is renamed to
ip_tunnel_ctl to better reflect that it doesn't directly implement ioctls
touching user memory, and is used for the guts of ndo_tunnel_ctl
implementations. A new ip_tunnel_ioctl helper is added that can be wired
up directly to the ndo_do_ioctl method and takes care of the copy to and
from userspace.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-05-19 15:03:13 +02:00
committed by David S. Miller
parent c1fd1182c4
commit 607259a695
6 changed files with 59 additions and 63 deletions
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6
include/linux/netdevice.h
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@@ -53,6 +53,7 @@ struct netpoll_info;
struct device;
struct phy_device;
struct dsa_port;
struct ip_tunnel_parm;
struct macsec_context;
struct macsec_ops;
@@ -1274,6 +1275,9 @@ struct netdev_net_notifier {
* Get devlink port instance associated with a given netdev.
* Called with a reference on the netdevice and devlink locks only,
* rtnl_lock is not held.
* int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p,
* int cmd);
* Add, change, delete or get information on an IPv4 tunnel.
*/
struct net_device_ops {
int (*ndo_init)(struct net_device *dev);
@@ -1479,6 +1483,8 @@ struct net_device_ops {
int (*ndo_xsk_wakeup)(struct net_device *dev,
u32 queue_id, u32 flags);
struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
int (*ndo_tunnel_ctl)(struct net_device *dev,
struct ip_tunnel_parm *p, int cmd);
};
/**