[SOCKET] make enum socket_type be arch overridable

To cope with MIPS, that has SOCK_STREAM and SOCK_DGRAM values swapped
to deal with binary compat.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@redhat.com>

include/asm-mips/socket.h

@@ -68,4 +68,31 @@ To add: #define SO_REUSEPORT 0x0200	/* Allow local address and port reuse.  */
 
 #define SO_PEERSEC		30
 
+/** sock_type - Socket types
+ *
+ * Please notice that for binary compat reasons MIPS has to
+ * override the enum sock_type in include/linux/net.h, so
+ * we define ARCH_HAS_SOCKET_TYPES here.
+ *
+ * @SOCK_DGRAM - datagram (conn.less) socket
+ * @SOCK_STREAM - stream (connection) socket
+ * @SOCK_RAW - raw socket
+ * @SOCK_RDM - reliably-delivered message
+ * @SOCK_SEQPACKET - sequential packet socket 
+ * @SOCK_PACKET - linux specific way of getting packets at the dev level.
+ *		  For writing rarp and other similar things on the user level.
+ */
+enum sock_type {
+	SOCK_DGRAM	= 1,
+	SOCK_STREAM	= 2,
+	SOCK_RAW	= 3,
+	SOCK_RDM	= 4,
+	SOCK_SEQPACKET	= 5,
+	SOCK_PACKET	= 10,
+};
+
+#define SOCK_MAX (SOCK_PACKET + 1)
+
+#define ARCH_HAS_SOCKET_TYPES
+
 #endif /* _ASM_SOCKET_H */

include/linux/net.h

@@ -21,6 +21,7 @@
 #include <linux/config.h>
 #include <linux/wait.h>
 #include <linux/stringify.h>
+#include <asm/socket.h>
 
 struct poll_table_struct;
 struct inode;
@@ -61,8 +62,13 @@ typedef enum {
 #define SOCK_ASYNC_WAITDATA	1
 #define SOCK_NOSPACE		2
 
+#ifndef ARCH_HAS_SOCKET_TYPES
 /** sock_type - Socket types
- *
+ * 
+ * When adding some new socket type please
+ * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
+ * overrides this enum for binary compat reasons.
+ * 
  * @SOCK_STREAM - stream (connection) socket
  * @SOCK_DGRAM - datagram (conn.less) socket
  * @SOCK_RAW - raw socket
@@ -82,6 +88,8 @@ enum sock_type {
 
 #define SOCK_MAX (SOCK_PACKET + 1)
 
+#endif /* ARCH_HAS_SOCKET_TYPES */
+
 /**
  *  struct socket - general BSD socket
  *  @state - socket state (%SS_CONNECTED, etc)