diff options
author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2015-04-07 09:51:54 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2015-04-07 21:29:41 (GMT) |
commit | a143c40c32bb8a6d6a556920646021d7e96d1f91 (patch) | |
tree | 2c9faf03479b4aaefe193c47b2c66061e95ddfcd /net/core | |
parent | 9a9634545c7051f567096117d417e9c3be24706d (diff) | |
download | linux-a143c40c32bb8a6d6a556920646021d7e96d1f91.tar.xz |
netns: allow to dump netns ids
Which this patch, it's possible to dump the list of ids allocated for peer
netns.
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/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 b3b5f22..a3abb719 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; } |