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hv_netvsc: move VF to same namespace as netvsc device

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When VF is added, the paravirtual device is already present
and may have been moved to another network namespace. For example,
sometimes the management interface is put in another net namespace
in some environments.

The VF should get moved to where the netvsc device is when the
VF is discovered. The user can move it later (if desired).

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2018-06-11 12:44:56 -07:00 committed by David S. Miller
parent 7bf7bb37f1
commit c0a41b887c
1 changed files with 20 additions and 1 deletions
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21
drivers/net/hyperv/netvsc_drv.c
View file

@ -1928,6 +1928,7 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
struct net_device *ndev;
struct net_device_context *net_device_ctx;
struct netvsc_device *netvsc_dev;
int ret;
if (vf_netdev->addr_len != ETH_ALEN)
return NOTIFY_DONE;
@ -1946,11 +1947,29 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev))
return NOTIFY_DONE;
if (netvsc_vf_join(vf_netdev, ndev) != 0)
/* if syntihetic interface is a different namespace,
* then move the VF to that namespace; join will be
* done again in that context.
*/
if (!net_eq(dev_net(ndev), dev_net(vf_netdev))) {
ret = dev_change_net_namespace(vf_netdev,
dev_net(ndev), "eth%d");
if (ret)
netdev_err(vf_netdev,
"could not move to same namespace as %s: %d\n",
ndev->name, ret);
else
netdev_info(vf_netdev,
"VF moved to namespace with: %s\n",
ndev->name);
return NOTIFY_DONE;
}
netdev_info(ndev, "VF registering: %s\n", vf_netdev->name);
if (netvsc_vf_join(vf_netdev, ndev) != 0)
return NOTIFY_DONE;
dev_hold(vf_netdev);
rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev);
return NOTIFY_OK;