[PATCH net-next] net: ipv6: add NLM_F_APPEND in notifications when applicable

[PATCH net-next] net: ipv6: add NLM_F_APPEND in notifications when applicable

[David Ahern]

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>
---
sending this one outside of the multipath patch set since it has
nothing to do with multipath.

 net/ipv6/ip6_fib.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index ef5485204522..bcaf247232d7 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -746,6 +746,9 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 	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) {
-- 
2.1.4

Re: [PATCH net-next] net: ipv6: add NLM_F_APPEND in notifications when applicable

[David Miller]

From: David Ahern <dsa@cumulusnetworks.com>
Date: Tue, 31 Jan 2017 16:51:37 -0800

> 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>
> ---
> sending this one outside of the multipath patch set since it has
> nothing to do with multipath.

Looks good Dave, applied, thank you.