On Tue, Oct 11, 2022 at 01:33:08AM +0200, Stefano Brivio wrote:
With default options, when we pass --config-net, the
IPv6 address is
actually going to be recycled from the init namespace, so it is in
fact duplicated, but duplicate address detection has no way to find
out.
With a different configured address, that's not the case, but anyway
duplicate address detection will be unable to see this.
In both cases, we're wasting time for nothing.
Pass the IFA_F_NODAD flag as we configure globally scoped IPv6
addresses via netlink.
Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com>
Reviewed-by: David Gibson <david(a)gibson.dropbear.id.au>
---
netlink.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/netlink.c b/netlink.c
index 9719e91..6e5a96b 100644
--- a/netlink.c
+++ b/netlink.c
@@ -343,6 +343,9 @@ void nl_addr(int ns, unsigned int ifi, sa_family_t af,
if (af == AF_INET6) {
size_t rta_len = RTA_LENGTH(sizeof(req.set.a6.l));
+ /* By default, strictly speaking, it's duplicated */
+ req.ifa.ifa_flags = IFA_F_NODAD;
+
req.nlh.nlmsg_len = offsetof(struct req_t, set.a6)
+ sizeof(req.set.a6);
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson