compat: add struct compat_ifreq etc to compat.h

In order to move socket ioctl conversion code into multiple
places in the socket code, we need a common defintion of
the data structures it uses.

Also change the name from ifreq32 to compat_ifreq to
follow the naming convention for compat.h

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/compat.h

@@ -10,6 +10,8 @@
 #include <linux/stat.h>
 #include <linux/param.h>	/* for HZ */
 #include <linux/sem.h>
+#include <linux/socket.h>
+#include <linux/if.h>
 
 #include <asm/compat.h>
 #include <asm/siginfo.h>
@@ -154,6 +156,43 @@ typedef struct compat_sigevent {
 	} _sigev_un;
 } compat_sigevent_t;
 
+struct compat_ifmap {
+	compat_ulong_t mem_start;
+	compat_ulong_t mem_end;
+	unsigned short base_addr;
+	unsigned char irq;
+	unsigned char dma;
+	unsigned char port;
+};
+
+struct compat_ifreq {
+#define IFHWADDRLEN     6
+#define IFNAMSIZ        16
+        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;
+};
+
+struct compat_ifconf {
+        compat_int_t	ifc_len;                        /* size of buffer       */
+        compat_caddr_t  ifcbuf;
+};
+
 struct compat_robust_list {
 	compat_uptr_t			next;
 };