[PATCH net-next v5 05/10] ipv6: expose the route deletion reason in RTM_DELROUTE
From: Yuyang Huang <hidden>
Date: 2026-08-04 01:47:53
Also in:
linux-kselftest, lkml
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Emit RTA_DEL_REASON from rt6_fill_node() when the deletion reason is not RT_DEL_REASON_UNSPEC, and reserve room for it in rt6_nlmsg_size(). Every caller still passes RT_DEL_REASON_UNSPEC. Signed-off-by: Yuyang Huang <redacted> --- net/ipv6/route.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 6732e95bf7b3..d3bf2dd209bd 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c@@ -5751,6 +5751,7 @@ static size_t rt6_nlmsg_size(struct fib6_info *f6i) + nla_total_size(sizeof(struct rta_cacheinfo)) + nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */ + nla_total_size(1) /* RTA_PREF */ + + nla_total_size(4) /* RTA_DEL_REASON */ + nexthop_len; }
@@ -5966,6 +5967,10 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, if (rtnl_put_cacheinfo(skb, dst, 0, expires, dst ? dst->error : 0) < 0) goto nla_put_failure; + if (del_reason != RT_DEL_REASON_UNSPEC && + nla_put_u32(skb, RTA_DEL_REASON, del_reason)) + goto nla_put_failure; + if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt6_flags))) goto nla_put_failure;
--
2.43.0