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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>
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@ -746,6 +746,9 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
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u16 nlflags = NLM_F_EXCL;
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int err;
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if (info->nlh && (info->nlh->nlmsg_flags & NLM_F_APPEND))
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nlflags |= NLM_F_APPEND;
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ins = &fn->leaf;
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for (iter = fn->leaf; iter; iter = iter->dst.rt6_next) {
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