From 3a4f68bf660414801781fd06506a9c75c2d936e5 Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Mon, 26 Nov 2018 15:42:05 +0100 Subject: [PATCH] netns: enable to specify a nsid for a get request Combined with NETNSA_TARGET_NSID, it enables to "translate" a nsid from one netns to a nsid of another netns. This is useful when using NETLINK_F_LISTEN_ALL_NSID because it helps the user to interpret a nsid received from an other netns. Signed-off-by: Nicolas Dichtel Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/core/net_namespace.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 885c54197e31..dd25fb22ad45 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -797,6 +797,11 @@ static int rtnl_net_getid(struct sk_buff *skb, struct nlmsghdr *nlh, } else if (tb[NETNSA_FD]) { peer = get_net_ns_by_fd(nla_get_u32(tb[NETNSA_FD])); nla = tb[NETNSA_FD]; + } else if (tb[NETNSA_NSID]) { + peer = get_net_ns_by_id(net, nla_get_u32(tb[NETNSA_NSID])); + if (!peer) + peer = ERR_PTR(-ENOENT); + nla = tb[NETNSA_NSID]; } else { NL_SET_ERR_MSG(extack, "Peer netns reference is missing"); return -EINVAL; -- 2.11.0