mcast: define and use MRT[6]_MAX in ip[6]_mroute_opt()

This will ease further addition of new MRT[6]_* values and avoid to update
in6.h each time.
Note that we reduce the maximum value from 210 to 209, but 210 does not match
any known value in ip[6]_mroute_setsockopt().

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 11 deletions

diff --git a/include/uapi/linux/in6.h b/include/uapi/linux/in6.h
index 5673b97dcf54..53b1d56a6e7f 100644
--- a/include/uapi/linux/in6.h
+++ b/include/uapi/linux/in6.h
@@ -259,17 +259,10 @@ struct in6_flowlabel_req {
 
 /*
  * Multicast Routing:
- * see include/linux/mroute6.h.
+ * see include/uapi/linux/mroute6.h.
  *
- * MRT6_INIT                    200
- * MRT6_DONE                    201
- * MRT6_ADD_MIF                 202
- * MRT6_DEL_MIF                 203
- * MRT6_ADD_MFC                 204
- * MRT6_DEL_MFC                 205
- * MRT6_VERSION                 206
- * MRT6_ASSERT                  207
- * MRT6_PIM                     208
- * (reserved)                   209
+ * MRT6_BASE                    200
+ * ...
+ * MRT6_MAX
  */
 #endif /* _UAPI_LINUX_IN6_H */