@@ -1499,6 +1499,8 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
idx = 0;
head = &net->dev_index_head[h];
rcu_read_lock();
+ cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^
+ net->dev_base_seq;
hlist_for_each_entry_rcu(dev, head, index_hlist) {
if (idx < s_idx)
goto cont;
@@ -1519,6 +1521,7 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
rcu_read_unlock();
goto done;
}
+ nl_dump_check_consistent(cb, nlmsg_hdr(skb));
}
cont:
idx++;
@@ -1808,6 +1811,8 @@ static int inet_netconf_dump_devconf(struct sk_buff *skb,
idx = 0;
head = &net->dev_index_head[h];
rcu_read_lock();
+ cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^
+ net->dev_base_seq;
hlist_for_each_entry_rcu(dev, head, index_hlist) {
if (idx < s_idx)
goto cont;
@@ -1825,6 +1830,7 @@ static int inet_netconf_dump_devconf(struct sk_buff *skb,
rcu_read_unlock();
goto done;
}
+ nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
idx++;
}
This patch takes benefit of dev_addr_genid and 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. 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> --- net/ipv4/devinet.c | 6 ++++++ 1 file changed, 6 insertions(+)