From: Ido Schimmel <idosch@mellanox.com>
Date: Thu, 3 Aug 2017 13:28:20 +0200
Subject: ipv6: fib: Add offload indication to routes
Patch-mainline: v4.14-rc1
Git-commit: 61e4d01e16acddadb9723143637a20417fa67ac9
References: bsc#1112374
Allow user space applications to see which routes are offloaded and
which aren't by setting the RTNH_F_OFFLOAD flag when dumping them.
To be consistent with IPv4, offload indication is provided on a
per-nexthop basis.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/uapi/linux/ipv6_route.h | 1 +
net/ipv6/route.c | 8 ++++++++
2 files changed, 9 insertions(+)
--- a/include/uapi/linux/ipv6_route.h
+++ b/include/uapi/linux/ipv6_route.h
@@ -35,6 +35,7 @@
#define RTF_PREF(pref) ((pref) << 27)
#define RTF_PREF_MASK 0x18000000
+#define RTF_OFFLOAD 0x20000000 /* offloaded route */
#define RTF_PCPU 0x40000000 /* read-only: can not be set by user */
#define RTF_LOCAL 0x80000000
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1827,6 +1827,11 @@ static struct rt6_info *ip6_route_info_c
goto out;
}
+ if (cfg->fc_flags & RTF_OFFLOAD) {
+ NL_SET_ERR_MSG(extack, "Userspace can not set RTF_OFFLOAD");
+ goto out;
+ }
+
if (cfg->fc_dst_len > 128) {
NL_SET_ERR_MSG(extack, "Invalid prefix length");
goto out;
@@ -3337,6 +3342,9 @@ static int rt6_nexthop_info(struct sk_bu
goto nla_put_failure;
}
+ if (rt->rt6i_flags & RTF_OFFLOAD)
+ *flags |= RTNH_F_OFFLOAD;
+
/* not needed for multipath encoding b/c it has a rtnexthop struct */
if (!skip_oif && rt->dst.dev &&
nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex))