diff options
| author | Thomas Graf <tgraf@infradead.org> | 2011-06-21 03:11:20 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-01 15:39:53 -0700 |
| commit | 4e985adaa504c1c1a05c8e013777ea0791a17b4d (patch) | |
| tree | d2eedf47256577ebfc67f0356c9b348590b560d3 /net/core/net_namespace.c | |
| parent | e77aeb71f04ed236fffe5f347e208c8b0e92d48a (diff) | |
rtnl: provide link dump consistency info
This patch adds a change sequence counter to each net namespace
which is bumped whenever a netdevice is added or removed from
the list. If such a change occurred while a link dump took place,
the dump will have the NLM_F_DUMP_INTR flag set in the first
message which has been interrupted and in all subsequent messages
of the same dump.
Note that links may still be modified or renamed while a dump is
taking place but we can guarantee for userspace to receive a
complete list of links and not miss any.
Testing:
I have added 500 VLAN netdevices to make sure the dump is split
over multiple messages. Then while continuously dumping links in
one process I also continuously deleted and re-added a dummy
netdevice in another process. Multiple dumps per seconds have
had the NLM_F_DUMP_INTR flag set.
I guess we can wait for Johannes patch to hit net-next via the
wireless tree. I just wanted to give this some testing right away.
Signed-off-by: Thomas Graf <tgraf@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/net_namespace.c')
| -rw-r--r-- | net/core/net_namespace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index ea489db1bc23..5bbdbf0d3664 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -129,6 +129,7 @@ static __net_init int setup_net(struct net *net) atomic_set(&net->count, 1); atomic_set(&net->passive, 1); + net->dev_base_seq = 1; #ifdef NETNS_REFCNT_DEBUG atomic_set(&net->use_count, 0); |