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net: Allow setting the network namespace by fd

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Take advantage of the new abstraction and allow network devices
to be placed in any network namespace that we have a fd to talk
about.

Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2011-05-04 17:51:50 -07:00
parent a00eaf11a2
commit f063052947
4 changed files with 37 additions and 3 deletions
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5
net/core/rtnetlink.c
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@@ -1043,6 +1043,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_LINKMODE] = { .type = NLA_U8 },
[IFLA_LINKINFO] = { .type = NLA_NESTED },
[IFLA_NET_NS_PID] = { .type = NLA_U32 },
[IFLA_NET_NS_FD] = { .type = NLA_U32 },
[IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
[IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
[IFLA_VF_PORTS] = { .type = NLA_NESTED },
@@ -1091,6 +1092,8 @@ struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
*/
if (tb[IFLA_NET_NS_PID])
net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
else if (tb[IFLA_NET_NS_FD])
net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
else
net = get_net(src_net);
return net;
@@ -1221,7 +1224,7 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
int send_addr_notify = 0;
int err;
if (tb[IFLA_NET_NS_PID]) {
if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
struct net *net = rtnl_link_get_net(dev_net(dev), tb);
if (IS_ERR(net)) {
err = PTR_ERR(net);