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

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Date:	Fri, 8 Dec 2006 17:36:09 -0800
From:	Chris Wright <chrisw@...s-sol.org>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	akpm@...l.org, "Theodore Ts'o" <tytso@....edu>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Justin Forbes <jmforbes@...uxtx.org>, torvalds@...l.org,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	alan@...rguk.ukuu.org.uk, davem@...emloft.net
Subject: [patch 33/32] NETLINK: Put {IFA,IFLA}_{RTA,PAYLOAD} macros back for userspace.

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

From: David Miller <davem@...emloft.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@...emloft.net>
Signed-off-by: Chris Wright <chrisw@...s-sol.org>
---
commit c0279128f20aa3580b0b43aaa49f351f6bad5f30
Author: David S. Miller <davem@...set.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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