From 2d230e2b2c3111cf4a11619f60dcd158ae84e3ab Mon Sep 17 00:00:00 2001 From: Julian Anastasov Date: Sat, 19 Mar 2011 12:13:52 +0000 Subject: [PATCH] ipv4: remove the routes on secondary promotion The secondary address promotion relies on fib_sync_down_addr to remove all routes created for the secondary addresses when the old primary address is deleted. It does not happen for cases when the primary address is also in another subnet. Fix that by deleting local and broadcast routes for all secondaries while they are on device list and by faking that all addresses from this subnet are to be deleted. It relies on fib_del_ifaddr being able to ignore the IPs from the concerned subnet while checking for duplication. Signed-off-by: Julian Anastasov Signed-off-by: David S. Miller --- net/ipv4/devinet.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 6d85800daeb7..2523001f4c9a 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -345,6 +345,17 @@ static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, } } + /* On promotion all secondaries from subnet are changing + * the primary IP, we must remove all their routes silently + * and later to add them back with new prefsrc. Do this + * while all addresses are on the device list. + */ + for (ifa = promote; ifa; ifa = ifa->ifa_next) { + if (ifa1->ifa_mask == ifa->ifa_mask && + inet_ifa_match(ifa1->ifa_address, ifa)) + fib_del_ifaddr(ifa, ifa1); + } + /* 2. Unlink it */ *ifap = ifa1->ifa_next; -- 2.20.1