2 files changed, 47 insertions, 17 deletions

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 224c7a896172..ef68119a4fd2 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -165,25 +165,32 @@ 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" */
-        } ifr_ifrn;
-        union {
-                struct  sockaddr ifru_addr;
-                struct  sockaddr ifru_dstaddr;
-                struct  sockaddr ifru_broadaddr;
-                struct  sockaddr ifru_netmask;
-                struct  sockaddr ifru_hwaddr;
-                short   ifru_flags;
-                compat_int_t     ifru_ivalue;
-                compat_int_t     ifru_mtu;
-                struct  compat_ifmap ifru_map;
-                char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
+        union {
+                char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
+        } ifr_ifrn;
+        union {
+                struct  sockaddr ifru_addr;
+                struct  sockaddr ifru_dstaddr;
+                struct  sockaddr ifru_broadaddr;
+                struct  sockaddr ifru_netmask;
+                struct  sockaddr ifru_hwaddr;
+                short   ifru_flags;
+                compat_int_t    ifru_ivalue;
+                compat_int_t    ifru_mtu;
+                struct  compat_ifmap ifru_map;
+                char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
                 char    ifru_newname[IFNAMSIZ];
-                compat_caddr_t ifru_data;
-            /* XXXX? ifru_settings should be here */
-        } ifr_ifru;
+                compat_caddr_t  ifru_data;
+                struct  compat_if_settings ifru_settings;
+        } ifr_ifru;
 };
 
 struct compat_ifconf {
diff --git a/net/socket.c b/net/socket.c
index 224e7f73fdf0..befd9f5b1620 100644
--- a/net/socket.c
+++ b/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: