From: Ido Schimmel <idosch@mellanox.com>
Date: Tue, 14 Jan 2020 13:23:12 +0200
Subject: ipv6: Add "offload" and "trap" indications to routes
Patch-mainline: v5.6-rc1
Git-commit: bb3c4ab93e44784c1e958bdbba7824bba40f23cd
References: bsc#1176774

In a similar fashion to previous patch, add "offload" and "trap"
indication to IPv6 routes.

This is done by using two unused bits in 'struct fib6_info' to hold
these indications. Capable drivers are expected to set these when
processing the various in-kernel route notifications.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/net/ip6_fib.h |   11 ++++++++++-
 net/ipv6/route.c      |    7 +++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -192,7 +192,9 @@ struct fib6_info {
 					dst_nopolicy:1,
 					dst_host:1,
 					fib6_destroying:1,
-					unused:3;
+					offload:1,
+					trap:1,
+					unused:1;
 
 	struct rcu_head			rcu;
 	struct nexthop			*nh;
@@ -329,6 +331,13 @@ static inline void fib6_info_release(str
 		call_rcu(&f6i->rcu, fib6_info_destroy_rcu);
 }
 
+static inline void fib6_info_hw_flags_set(struct fib6_info *f6i, bool offload,
+					  bool trap)
+{
+	f6i->offload = offload;
+	f6i->trap = trap;
+}
+
 enum fib6_walk_state {
 #ifdef CONFIG_IPV6_SUBTREES
 	FWS_S,
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -5578,6 +5578,13 @@ static int rt6_fill_node(struct net *net
 		expires -= jiffies;
 	}
 
+	if (!dst) {
+		if (rt->offload)
+			rtm->rtm_flags |= RTM_F_OFFLOAD;
+		if (rt->trap)
+			rtm->rtm_flags |= RTM_F_TRAP;
+	}
+
 	if (rtnl_put_cacheinfo(skb, dst, 0, expires, dst ? dst->error : 0) < 0)
 		goto nla_put_failure;