summaryrefslogtreecommitdiffstats
path: root/net/ipv6
diff options
context:
space:
mode:
authorNicolas Dichtel <nicolas.dichtel@6wind.com>2013-03-22 06:28:43 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-24 17:16:29 -0400
commit63998ac24f8370caf99e433483532bab8368eb7e (patch)
tree6128d2e8e783079c404f2f7c5c64616c7db1b507 /net/ipv6
parent0465277f6b3fd0535428ae935644ac30ce903de0 (diff)
downloadop-kernel-dev-63998ac24f8370caf99e433483532bab8368eb7e.zip
op-kernel-dev-63998ac24f8370caf99e433483532bab8368eb7e.tar.gz
ipv6: provide addr and netconf dump consistency info
This patch adds a dev_addr_genid for IPv6. The goal is to use it, combined with dev_base_seq to check if a change occurs during a netlink dump. If a change is detected, the flag NLM_F_DUMP_INTR is set in the first message after the dump was interrupted. Note that only dump of unicast addresses is checked (multicast and anycast are not checked). Reported-by: Junwei Zhang <junwei.zhang@6wind.com> Reported-by: Hongjun Li <hongjun.li@6wind.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/addrconf.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 15794fd..1b9f4f2 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -621,6 +621,8 @@ static int inet6_netconf_dump_devconf(struct sk_buff *skb,
idx = 0;
head = &net->dev_index_head[h];
rcu_read_lock();
+ cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
+ net->dev_base_seq;
hlist_for_each_entry_rcu(dev, head, index_hlist) {
if (idx < s_idx)
goto cont;
@@ -638,6 +640,7 @@ static int inet6_netconf_dump_devconf(struct sk_buff *skb,
rcu_read_unlock();
goto done;
}
+ nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
@@ -3874,6 +3877,7 @@ static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
NLM_F_MULTI);
if (err <= 0)
break;
+ nl_dump_check_consistent(cb, nlmsg_hdr(skb));
}
break;
}
@@ -3931,6 +3935,7 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
s_ip_idx = ip_idx = cb->args[2];
rcu_read_lock();
+ cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
idx = 0;
head = &net->dev_index_head[h];
@@ -4407,6 +4412,8 @@ errout:
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
{
+ struct net *net = dev_net(ifp->idev->dev);
+
inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
switch (event) {
@@ -4432,6 +4439,7 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
dst_free(&ifp->rt->dst);
break;
}
+ atomic_inc(&net->ipv6.dev_addr_genid);
}
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
OpenPOWER on IntegriCloud