This causes checkpoint to fail if an interface actually has a
multicast membership.
Signed-off-by: Dan Smith <danms@xxxxxxxxxx>
---
net/ipv4/devinet.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index fa7799c..83411fc 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1624,6 +1624,7 @@ static int devinet_checkpoint(struct ckpt_ctx *ctx, struct net_device *dev,
{
struct in_device *indev = dev->ip_ptr;
struct in_ifaddr *addr = indev->ifa_list;
+ struct ip_mc_list *mcaddr;
for (addr = indev->ifa_list; addr ; addr = addr->ifa_next) {
addrs[index].type = CKPT_NETDEV_ADDR_IPV4;
@@ -1636,6 +1637,20 @@ static int devinet_checkpoint(struct ckpt_ctx *ctx, struct net_device *dev,
return -E2BIG;
}
+ for (mcaddr = indev->mc_list; mcaddr; mcaddr = mcaddr->next) {
+ if ((mcaddr->multiaddr & IGMP_LOCAL_GROUP_MASK) ==
+ IGMP_LOCAL_GROUP)
+ continue;
+
+ /* TODO */
+
+ /* Multicast addresses are not supported, so do not
+ * allow checkpoint to continue if one is assigned
+ */
+ ckpt_debug("ipv4 multicast addresses are not supported\n");
+ return -EINVAL;
+ }
+
return index;
}
--
1.6.2.5
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