[patch 33/32] NETLINK: Put {IFA,IFLA}_{RTA,PAYLOAD} macros back for userspace.

[Chris Wright <chrisw@sous-sol.org>]

-stable review patch.  If anyone has any objections, please let us know.
------------------

From: David Miller <davem@davemloft.net>

NETLINK: Put {IFA,IFLA}_{RTA,PAYLOAD} macros back for userspace.

GLIBC uses them etc.

They are guarded by ifndef __KERNEL__ so nobody will start
accidently using them in the kernel again, it's just for
userspace.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---
commit c0279128f20aa3580b0b43aaa49f351f6bad5f30
Author: David S. Miller <davem@sunset.davemloft.net>
Date:   Fri Dec 8 17:05:13 2006 -0800

 include/linux/if_addr.h |    6 ++++++
 include/linux/if_link.h |    6 ++++++
 2 files changed, 12 insertions(+)

--- linux-2.6.19.orig/include/linux/if_addr.h
+++ linux-2.6.19/include/linux/if_addr.h
@@ -52,4 +52,10 @@ struct ifa_cacheinfo
 	__u32	tstamp; /* updated timestamp, hundredths of seconds */
 };
 
+/* backwards compatibility for userspace */
+#ifndef __KERNEL__
+#define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
+#endif
+
 #endif
--- linux-2.6.19.orig/include/linux/if_link.h
+++ linux-2.6.19/include/linux/if_link.h
@@ -82,6 +82,12 @@ enum
 
 #define IFLA_MAX (__IFLA_MAX - 1)
 
+/* backwards compatibility for userspace */
+#ifndef __KERNEL__
+#define IFLA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifinfomsg))))
+#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
+#endif
+
 /* ifi_flags.
 
    IFF_* flags.
-
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