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-rw-r--r--include/linux/rtnetlink.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index d607219af6ac..1ecaea74d55a 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -93,6 +93,8 @@ enum {
#define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1)
};
+#define RTM_FAM(cmd) (((cmd) - RTM_BASE) >> 2)
+
/*
Generic structure for encapsulation of optional route information.
It is reminiscent of sockaddr, but with sa_family replaced