[LTP] [PATCH 1/1] lapi: Add missing IFA_FLAGS

[Petr Vorel]

From: Petr Vorel <petr.vorel@gmail.com>

and use them in tst_netdevice.c. This fixes on older toolchains
(e.g. sourcery-arm from Buildroot):

tst_netdevice.c: In function 'modify_address':
tst_netdevice.c:218:44: error: 'IFA_FLAGS' undeclared (first use in this function)
  if (!tst_rtnl_add_attr(file, lineno, ctx, IFA_FLAGS, &addr_flags,

Fixes: bc2151a65 ("lib: Add helper functions for managing network interfaces")

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
 configure.ac           |  1 +
 include/lapi/if_addr.h | 15 +++++++++++++++
 lib/tst_netdevice.c    |  2 ++
 3 files changed, 18 insertions(+)
 create mode 100644 include/lapi/if_addr.h

diff --git a/configure.ac b/configure.ac
index 136d82d09..08a56f9ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,6 +51,7 @@ AC_CHECK_HEADERS_ONCE([ \
     linux/dccp.h \
     linux/fs.h \
     linux/genetlink.h \
+    linux/if_addr.h \
     linux/if_alg.h \
     linux/if_ether.h \
     linux/if_packet.h \
diff --git a/include/lapi/if_addr.h b/include/lapi/if_addr.h
new file mode 100644
index 000000000..c1acfe4fb
--- /dev/null
+++ b/include/lapi/if_addr.h
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Copyright (c) 2021 Petr Vorel <petr.vorel@gmail.com> */
+
+#ifndef LAPI_IF_ADDR_H__
+# define LAPI_IF_ADDR_H__
+
+# ifdef HAVE_LINUX_IF_ADDR_H
+#  include <linux/if_addr.h>
+# endif
+
+#ifndef IFA_FLAGS
+# define IFA_FLAGS 8
+#endif
+
+#endif	/* LAPI_IF_ADDR_H__ */
diff --git a/lib/tst_netdevice.c b/lib/tst_netdevice.c
index 5ca523759..a95f19d35 100644
--- a/lib/tst_netdevice.c
+++ b/lib/tst_netdevice.c
@@ -9,6 +9,8 @@
 #include <linux/veth.h>
 #include <sys/socket.h>
 #include <net/if.h>
+#include "lapi/if_addr.h"
+
 #define TST_NO_DEFAULT_MAIN
 #include "tst_test.h"
 #include "tst_rtnetlink.h"
-- 
2.31.1