net/compat_ioctl: support SIOCWANDEV

This adds compat_ioctl support for SIOCWANDEV, which has
always been missing.

The definition of struct compat_ifreq was missing an
ifru_settings fields that is needed to support SIOCWANDEV,
so add that and clean up the whitespace damage in the
struct definition.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/compat.h

@@ -165,6 +165,13 @@ struct compat_ifmap {
 	unsigned char port;
 };
 
+struct compat_if_settings
+{
+	unsigned int type;	/* Type of physical device or protocol */
+	unsigned int size;	/* Size of the data allocated by the caller */
+	compat_uptr_t ifs_ifsu;	/* union of pointers */
+};
+
 struct compat_ifreq {
 	union {
 		char	ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
@@ -182,7 +189,7 @@ struct compat_ifreq {
 		char	ifru_slave[IFNAMSIZ];   /* Just fits the size */
 		char	ifru_newname[IFNAMSIZ];
 		compat_caddr_t	ifru_data;
-	    /* XXXX? ifru_settings should be here */
+		struct	compat_if_settings ifru_settings;
 	} ifr_ifru;
 };
 

net/socket.c

@@ -2627,6 +2627,27 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
 	return dev_ioctl(net, SIOCETHTOOL, ifr);
 }
 
+static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
+{
+	void __user *uptr;
+	compat_uptr_t uptr32;
+	struct ifreq __user *uifr;
+
+	uifr = compat_alloc_user_space(sizeof (*uifr));
+	if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
+		return -EFAULT;
+
+	if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
+		return -EFAULT;
+
+	uptr = compat_ptr(uptr32);
+
+	if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
+		return -EFAULT;
+
+	return dev_ioctl(net, SIOCWANDEV, uifr);
+}
+
 static int bond_ioctl(struct net *net, unsigned int cmd,
 			 struct compat_ifreq __user *ifr32)
 {
@@ -3058,6 +3079,8 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
 		return dev_ifconf(net, argp);
 	case SIOCETHTOOL:
 		return ethtool_ioctl(net, argp);
+	case SIOCWANDEV:
+		return compat_siocwandev(net, argp);
 	case SIOCBONDENSLAVE:
 	case SIOCBONDRELEASE:
 	case SIOCBONDSETHWADDR: