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macvtap: advertise link netns via netlink
[ Upstream commit a02192151b
]
Assign rtnl_link_ops->get_link_net() callback so that IFLA_LINK_NETNSID is
added to rtnetlink messages. This fixes iproute2 which otherwise resolved
the link interface to an interface in the wrong namespace.
Test commands:
ip netns add nst
ip link add dummy0 type dummy
ip link add link macvtap0 link dummy0 type macvtap
ip link set macvtap0 netns nst
ip -netns nst link show macvtap0
Before:
10: macvtap0@gre0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 500
link/ether 5e:8f:ae:1d:60:50 brd ff:ff:ff:ff:ff:ff
After:
10: macvtap0@if2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 500
link/ether 5e:8f:ae:1d:60:50 brd ff:ff:ff:ff:ff:ff link-netnsid 0
Reported-by: Leonardo Mörlein <freifunk@irrelefant.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Link: https://lore.kernel.org/r/20220228003240.1337426-1-sven@narfation.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 6 additions and 0 deletions
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@ -133,11 +133,17 @@ static void macvtap_setup(struct net_device *dev)
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dev->tx_queue_len = TUN_READQ_SIZE;
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}
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static struct net *macvtap_link_net(const struct net_device *dev)
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{
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return dev_net(macvlan_dev_real_dev(dev));
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}
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static struct rtnl_link_ops macvtap_link_ops __read_mostly = {
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.kind = "macvtap",
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.setup = macvtap_setup,
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.newlink = macvtap_newlink,
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.dellink = macvtap_dellink,
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.get_link_net = macvtap_link_net,
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.priv_size = sizeof(struct macvtap_dev),
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};
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