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authorNicolas Dichtel <nicolas.dichtel@6wind.com>2013-03-22 06:28:42 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-24 17:16:29 -0400
commit0465277f6b3fd0535428ae935644ac30ce903de0 (patch)
treed773aa622e9f208114a37487bf4dac0862def51d /net/core
parent976c90b90187f2eb4778d766d52d6ab176714734 (diff)
ipv4: provide addr and netconf dump consistency info
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. Note that seq and prev_seq must be reset between each family in rtnl_dump_all() because they are specific to each family. 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/core')
-rw-r--r--net/core/rtnetlink.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 751f1244b64..aeb81316a70 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1929,8 +1929,11 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
if (rtnl_msg_handlers[idx] == NULL ||
rtnl_msg_handlers[idx][type].dumpit == NULL)
continue;
- if (idx > s_idx)
+ if (idx > s_idx) {
memset(&cb->args[0], 0, sizeof(cb->args));
+ cb->prev_seq = 0;
+ cb->seq = 0;
+ }
if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
break;
}