diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/net_namespace.c | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index b3b5f22f0e90..a3abb719221f 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -616,6 +616,52 @@ out: return err; } +struct rtnl_net_dump_cb { + struct net *net; + struct sk_buff *skb; + struct netlink_callback *cb; + int idx; + int s_idx; +}; + +static int rtnl_net_dumpid_one(int id, void *peer, void *data) +{ + struct rtnl_net_dump_cb *net_cb = (struct rtnl_net_dump_cb *)data; + int ret; + + if (net_cb->idx < net_cb->s_idx) + goto cont; + + ret = rtnl_net_fill(net_cb->skb, NETLINK_CB(net_cb->cb->skb).portid, + net_cb->cb->nlh->nlmsg_seq, NLM_F_MULTI, + RTM_NEWNSID, net_cb->net, peer, id); + if (ret < 0) + return ret; + +cont: + net_cb->idx++; + return 0; +} + +static int rtnl_net_dumpid(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct net *net = sock_net(skb->sk); + struct rtnl_net_dump_cb net_cb = { + .net = net, + .skb = skb, + .cb = cb, + .idx = 0, + .s_idx = cb->args[0], + }; + + ASSERT_RTNL(); + + idr_for_each(&net->netns_ids, rtnl_net_dumpid_one, &net_cb); + + cb->args[0] = net_cb.idx; + return skb->len; +} + static void rtnl_net_notifyid(struct net *net, struct net *peer, int cmd, int id) { @@ -673,7 +719,8 @@ static int __init net_ns_init(void) register_pernet_subsys(&net_ns_ops); rtnl_register(PF_UNSPEC, RTM_NEWNSID, rtnl_net_newid, NULL, NULL); - rtnl_register(PF_UNSPEC, RTM_GETNSID, rtnl_net_getid, NULL, NULL); + rtnl_register(PF_UNSPEC, RTM_GETNSID, rtnl_net_getid, rtnl_net_dumpid, + NULL); return 0; } |