[PATCH net-next-2.6 1/3] ipv6: Send unsolicited neighbour advertismements when notified
DORMANTno replies
From: Ben Hutchings <hidden>
Date: 2011-04-15 23:46:06
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
The NETDEV_NOTIFY_PEERS notifier is a request to send such advertisements following migration to a different physical link, e.g. virtual machine migration. Signed-off-by: Ben Hutchings <redacted> --- This seems to work and should match what the bonding driver was previously doing on failover, except that it iterates over all addresses. I don't know whether it's actually right though. Ben. net/ipv6/ndisc.c | 26 ++++++++++++++++++++++++++ 1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 92f952d..a51fa74c 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c@@ -611,6 +611,29 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, inc_opt ? ND_OPT_TARGET_LL_ADDR : 0); } +static void ndisc_send_unsol_na(struct net_device *dev) +{ + struct inet6_dev *idev; + struct inet6_ifaddr *ifa; + struct in6_addr mcaddr; + + idev = in6_dev_get(dev); + if (!idev) + return; + + read_lock_bh(&idev->lock); + list_for_each_entry(ifa, &idev->addr_list, if_list) { + addrconf_addr_solict_mult(&ifa->addr, &mcaddr); + ndisc_send_na(dev, NULL, &mcaddr, &ifa->addr, + /*router=*/ !!idev->cnf.forwarding, + /*solicited=*/ false, /*override=*/ true, + /*inc_opt=*/ true); + } + read_unlock_bh(&idev->lock); + + in6_dev_put(idev); +} + void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh, const struct in6_addr *solicit, const struct in6_addr *daddr, const struct in6_addr *saddr)
@@ -1722,6 +1745,9 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, neigh_ifdown(&nd_tbl, dev); fib6_run_gc(~0UL, net); break; + case NETDEV_NOTIFY_PEERS: + ndisc_send_unsol_na(dev); + break; default: break; }
--
1.7.4
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Ben Hutchings, Senior Software Engineer, Solarflare
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