net: ipv6: add NLM_F_APPEND in notifications when applicable
IPv6 does not set the NLM_F_APPEND flag in notifications to signal that
a NEWROUTE is an append versus a new route or a replaced one. Add the
flag if the request has it.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index ef54852..febde6c 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -746,6 +746,9 @@
u16 nlflags = NLM_F_EXCL;
int err;
+ if (info->nlh && (info->nlh->nlmsg_flags & NLM_F_APPEND))
+ nlflags |= NLM_F_APPEND;
+
ins = &fn->leaf;
for (iter = fn->leaf; iter; iter = iter->dst.rt6_next) {