ip_tunnel: use ndo_siocdevprivate

The various ipv4 and ipv6 tunnel drivers each implement a set
of 12 SIOCDEVPRIVATE commands for managing tunnels. These
all work correctly in compat mode.

Move them over to the new .ndo_siocdevprivate operation.

Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: David Ahern <dsahern@kernel.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip_tunnels.h

@@ -270,7 +270,8 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
 void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
 		       const u8 proto, int tunnel_hlen);
 int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd);
-int ip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+			     void __user *data, int cmd);
 int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);
 int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);
 

net/ipv4/ip_gre.c

@@ -923,7 +923,7 @@ static const struct net_device_ops ipgre_netdev_ops = {
 	.ndo_stop		= ipgre_close,
 #endif
 	.ndo_start_xmit		= ipgre_xmit,
-	.ndo_do_ioctl		= ip_tunnel_ioctl,
+	.ndo_siocdevprivate	= ip_tunnel_siocdevprivate,
 	.ndo_change_mtu		= ip_tunnel_change_mtu,
 	.ndo_get_stats64	= dev_get_tstats64,
 	.ndo_get_iflink		= ip_tunnel_get_iflink,

net/ipv4/ip_tunnel.c

@@ -958,19 +958,20 @@ int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd)
 }
 EXPORT_SYMBOL_GPL(ip_tunnel_ctl);
 
-int ip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+			     void __user *data, int cmd)
 {
 	struct ip_tunnel_parm p;
 	int err;
 
-	if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+	if (copy_from_user(&p, data, sizeof(p)))
 		return -EFAULT;
 	err = dev->netdev_ops->ndo_tunnel_ctl(dev, &p, cmd);
-	if (!err && copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
+	if (!err && copy_to_user(data, &p, sizeof(p)))
 		return -EFAULT;
 	return err;
 }
-EXPORT_SYMBOL_GPL(ip_tunnel_ioctl);
+EXPORT_SYMBOL_GPL(ip_tunnel_siocdevprivate);
 
 int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict)
 {

net/ipv4/ip_vti.c

@@ -405,7 +405,7 @@ static const struct net_device_ops vti_netdev_ops = {
 	.ndo_init	= vti_tunnel_init,
 	.ndo_uninit	= ip_tunnel_uninit,
 	.ndo_start_xmit	= vti_tunnel_xmit,
-	.ndo_do_ioctl	= ip_tunnel_ioctl,
+	.ndo_siocdevprivate = ip_tunnel_siocdevprivate,
 	.ndo_change_mtu	= ip_tunnel_change_mtu,
 	.ndo_get_stats64 = dev_get_tstats64,
 	.ndo_get_iflink = ip_tunnel_get_iflink,

net/ipv4/ipip.c

@@ -347,7 +347,7 @@ static const struct net_device_ops ipip_netdev_ops = {
 	.ndo_init       = ipip_tunnel_init,
 	.ndo_uninit     = ip_tunnel_uninit,
 	.ndo_start_xmit	= ipip_tunnel_xmit,
-	.ndo_do_ioctl	= ip_tunnel_ioctl,
+	.ndo_siocdevprivate = ip_tunnel_siocdevprivate,
 	.ndo_change_mtu = ip_tunnel_change_mtu,
 	.ndo_get_stats64 = dev_get_tstats64,
 	.ndo_get_iflink = ip_tunnel_get_iflink,

net/ipv6/ip6_gre.c

@@ -1244,8 +1244,9 @@ static void ip6gre_tnl_parm_to_user(struct ip6_tnl_parm2 *u,
 	memcpy(u->name, p->name, sizeof(u->name));
 }
 
-static int ip6gre_tunnel_ioctl(struct net_device *dev,
-	struct ifreq *ifr, int cmd)
+static int ip6gre_tunnel_siocdevprivate(struct net_device *dev,
+					struct ifreq *ifr, void __user *data,
+					int cmd)
 {
 	int err = 0;
 	struct ip6_tnl_parm2 p;
@@ -1259,7 +1260,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
 	switch (cmd) {
 	case SIOCGETTUNNEL:
 		if (dev == ign->fb_tunnel_dev) {
-			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
+			if (copy_from_user(&p, data, sizeof(p))) {
 				err = -EFAULT;
 				break;
 			}
@@ -1270,7 +1271,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
 		}
 		memset(&p, 0, sizeof(p));
 		ip6gre_tnl_parm_to_user(&p, &t->parms);
-		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
+		if (copy_to_user(data, &p, sizeof(p)))
 			err = -EFAULT;
 		break;
 
@@ -1281,7 +1282,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
 			goto done;
 
 		err = -EFAULT;
-		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+		if (copy_from_user(&p, data, sizeof(p)))
 			goto done;
 
 		err = -EINVAL;
@@ -1318,7 +1319,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
 
 			memset(&p, 0, sizeof(p));
 			ip6gre_tnl_parm_to_user(&p, &t->parms);
-			if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
+			if (copy_to_user(data, &p, sizeof(p)))
 				err = -EFAULT;
 		} else
 			err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
@@ -1331,7 +1332,7 @@ static int ip6gre_tunnel_ioctl(struct net_device *dev,
 
 		if (dev == ign->fb_tunnel_dev) {
 			err = -EFAULT;
-			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+			if (copy_from_user(&p, data, sizeof(p)))
 				goto done;
 			err = -ENOENT;
 			ip6gre_tnl_parm_from_user(&p1, &p);
@@ -1398,7 +1399,7 @@ static const struct net_device_ops ip6gre_netdev_ops = {
 	.ndo_init		= ip6gre_tunnel_init,
 	.ndo_uninit		= ip6gre_tunnel_uninit,
 	.ndo_start_xmit		= ip6gre_tunnel_xmit,
-	.ndo_do_ioctl		= ip6gre_tunnel_ioctl,
+	.ndo_siocdevprivate	= ip6gre_tunnel_siocdevprivate,
 	.ndo_change_mtu		= ip6_tnl_change_mtu,
 	.ndo_get_stats64	= dev_get_tstats64,
 	.ndo_get_iflink		= ip6_tnl_get_iflink,

net/ipv6/ip6_tunnel.c

@@ -1581,9 +1581,10 @@ ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p)
 }
 
 /**
- * ip6_tnl_ioctl - configure ipv6 tunnels from userspace
+ * ip6_tnl_siocdevprivate - configure ipv6 tunnels from userspace
  *   @dev: virtual device associated with tunnel
- *   @ifr: parameters passed from userspace
+ *   @ifr: unused
+ *   @data: parameters passed from userspace
  *   @cmd: command to be performed
  *
  * Description:
@@ -1609,7 +1610,8 @@ ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p)
  **/
 
 static int
-ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+ip6_tnl_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+		       void __user *data, int cmd)
 {
 	int err = 0;
 	struct ip6_tnl_parm p;
@@ -1623,7 +1625,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	switch (cmd) {
 	case SIOCGETTUNNEL:
 		if (dev == ip6n->fb_tnl_dev) {
-			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
+			if (copy_from_user(&p, data, sizeof(p))) {
 				err = -EFAULT;
 				break;
 			}
@@ -1635,17 +1637,16 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 			memset(&p, 0, sizeof(p));
 		}
 		ip6_tnl_parm_to_user(&p, &t->parms);
-		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) {
+		if (copy_to_user(data, &p, sizeof(p)))
 			err = -EFAULT;
-		}
 		break;
 	case SIOCADDTUNNEL:
 	case SIOCCHGTUNNEL:
 		err = -EPERM;
 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
 			break;
 		err = -EFAULT;
-		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+		if (copy_from_user(&p, data, sizeof(p)))
 			break;
 		err = -EINVAL;
 		if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP &&
@@ -1669,7 +1670,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		if (!IS_ERR(t)) {
 			err = 0;
 			ip6_tnl_parm_to_user(&p, &t->parms);
-			if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
+			if (copy_to_user(data, &p, sizeof(p)))
 				err = -EFAULT;
 
 		} else {
@@ -1683,7 +1684,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 
 		if (dev == ip6n->fb_tnl_dev) {
 			err = -EFAULT;
-			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+			if (copy_from_user(&p, data, sizeof(p)))
 				break;
 			err = -ENOENT;
 			ip6_tnl_parm_from_user(&p1, &p);
@@ -1802,7 +1803,7 @@ static const struct net_device_ops ip6_tnl_netdev_ops = {
 	.ndo_init	= ip6_tnl_dev_init,
 	.ndo_uninit	= ip6_tnl_dev_uninit,
 	.ndo_start_xmit = ip6_tnl_start_xmit,
-	.ndo_do_ioctl	= ip6_tnl_ioctl,
+	.ndo_siocdevprivate = ip6_tnl_siocdevprivate,
 	.ndo_change_mtu = ip6_tnl_change_mtu,
 	.ndo_get_stats64 = dev_get_tstats64,
 	.ndo_get_iflink = ip6_tnl_get_iflink,

net/ipv6/ip6_vti.c

@@ -771,13 +771,14 @@ vti6_parm_to_user(struct ip6_tnl_parm2 *u, const struct __ip6_tnl_parm *p)
 }
 
 /**
- * vti6_ioctl - configure vti6 tunnels from userspace
+ * vti6_siocdevprivate - configure vti6 tunnels from userspace
  *   @dev: virtual device associated with tunnel
- *   @ifr: parameters passed from userspace
+ *   @ifr: unused
+ *   @data: parameters passed from userspace
  *   @cmd: command to be performed
  *
  * Description:
- *   vti6_ioctl() is used for managing vti6 tunnels
+ *   vti6_siocdevprivate() is used for managing vti6 tunnels
  *   from userspace.
  *
  *   The possible commands are the following:
@@ -798,7 +799,7 @@ vti6_parm_to_user(struct ip6_tnl_parm2 *u, const struct __ip6_tnl_parm *p)
  *   %-ENODEV if attempting to change or delete a nonexisting device
  **/
 static int
-vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+vti6_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd)
 {
 	int err = 0;
 	struct ip6_tnl_parm2 p;
@@ -810,7 +811,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	switch (cmd) {
 	case SIOCGETTUNNEL:
 		if (dev == ip6n->fb_tnl_dev) {
-			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
+			if (copy_from_user(&p, data, sizeof(p))) {
 				err = -EFAULT;
 				break;
 			}
@@ -822,7 +823,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		if (!t)
 			t = netdev_priv(dev);
 		vti6_parm_to_user(&p, &t->parms);
-		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
+		if (copy_to_user(data, &p, sizeof(p)))
 			err = -EFAULT;
 		break;
 	case SIOCADDTUNNEL:
@@ -831,7 +832,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
 			break;
 		err = -EFAULT;
-		if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+		if (copy_from_user(&p, data, sizeof(p)))
 			break;
 		err = -EINVAL;
 		if (p.proto != IPPROTO_IPV6  && p.proto != 0)
@@ -852,7 +853,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		if (t) {
 			err = 0;
 			vti6_parm_to_user(&p, &t->parms);
-			if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
+			if (copy_to_user(data, &p, sizeof(p)))
 				err = -EFAULT;
 
 		} else
@@ -865,7 +866,7 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 
 		if (dev == ip6n->fb_tnl_dev) {
 			err = -EFAULT;
-			if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
+			if (copy_from_user(&p, data, sizeof(p)))
 				break;
 			err = -ENOENT;
 			vti6_parm_from_user(&p1, &p);
@@ -890,7 +891,7 @@ static const struct net_device_ops vti6_netdev_ops = {
 	.ndo_init	= vti6_dev_init,
 	.ndo_uninit	= vti6_dev_uninit,
 	.ndo_start_xmit = vti6_tnl_xmit,
-	.ndo_do_ioctl	= vti6_ioctl,
+	.ndo_siocdevprivate = vti6_siocdevprivate,
 	.ndo_get_stats64 = dev_get_tstats64,
 	.ndo_get_iflink = ip6_tnl_get_iflink,
 };