Commit 3a4f68bf authored Nov 26, 2018 by Nicolas Dichtel Committed by David S. Miller Nov 27, 2018

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 <nicolas.dichtel@6wind.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent cff478b9

net/core/net_namespace.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;