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hv_netvsc: fix network namespace issues with VF support

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When finding the parent netvsc device, the search needs to be across
all netvsc device instances (independent of network namespace).

Find parent device of VF using upper_dev_get routine which
searches only adjacent list.

Fixes: e8ff40d4bf ("hv_netvsc: improve VF device matching")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>

netns aware byref
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2018-06-11 12:44:55 -07:00 committed by David S. Miller
parent 8cde8f0c0c
commit 7bf7bb37f1
2 changed files with 22 additions and 23 deletions
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2
drivers/net/hyperv/hyperv_net.h
View File

@ -901,6 +901,8 @@ struct net_device_context {
struct hv_device *device_ctx;
/* netvsc_device */
struct netvsc_device __rcu *nvdev;
/* list of netvsc net_devices */
struct list_head list;
/* reconfigure work */
struct delayed_work dwork;
/* last reconfig time */

43
drivers/net/hyperv/netvsc_drv.c
View File

@ -67,6 +67,8 @@ static int debug = -1;
module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
static LIST_HEAD(netvsc_dev_list);
static void netvsc_change_rx_flags(struct net_device *net, int change)
{
struct net_device_context *ndev_ctx = netdev_priv(net);
@ -1781,13 +1783,10 @@ static void netvsc_link_change(struct work_struct *w)
static struct net_device *get_netvsc_bymac(const u8 *mac)
{
struct net_device *dev;
struct net_device_context *ndev_ctx;
ASSERT_RTNL();
for_each_netdev(&init_net, dev) {
if (dev->netdev_ops != &device_ops)
continue; /* not a netvsc device */
list_for_each_entry(ndev_ctx, &netvsc_dev_list, list) {
struct net_device *dev = hv_get_drvdata(ndev_ctx->device_ctx);
if (ether_addr_equal(mac, dev->perm_addr))
return dev;
@ -1798,25 +1797,18 @@ static struct net_device *get_netvsc_bymac(const u8 *mac)
static struct net_device *get_netvsc_byref(struct net_device *vf_netdev)
{
struct net_device_context *net_device_ctx;
struct net_device *dev;
ASSERT_RTNL();
dev = netdev_master_upper_dev_get(vf_netdev);
if (!dev || dev->netdev_ops != &device_ops)
return NULL; /* not a netvsc device */
for_each_netdev(&init_net, dev) {
struct net_device_context *net_device_ctx;
net_device_ctx = netdev_priv(dev);
if (!rtnl_dereference(net_device_ctx->nvdev))
return NULL; /* device is removed */
if (dev->netdev_ops != &device_ops)
continue; /* not a netvsc device */
net_device_ctx = netdev_priv(dev);
if (!rtnl_dereference(net_device_ctx->nvdev))
continue; /* device is removed */
if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev)
return dev; /* a match */
}
return NULL;
return dev;
}
/* Called when VF is injecting data into network stack.
@ -2093,15 +2085,19 @@ static int netvsc_probe(struct hv_device *dev,
else
net->max_mtu = ETH_DATA_LEN;
ret = register_netdev(net);
rtnl_lock();
ret = register_netdevice(net);
if (ret != 0) {
pr_err("Unable to register netdev.\n");
goto register_failed;
}
return ret;
list_add(&net_device_ctx->list, &netvsc_dev_list);
rtnl_unlock();
return 0;
register_failed:
rtnl_unlock();
rndis_filter_device_remove(dev, nvdev);
rndis_failed:
free_percpu(net_device_ctx->vf_stats);
@ -2147,6 +2143,7 @@ static int netvsc_remove(struct hv_device *dev)
rndis_filter_device_remove(dev, nvdev);
unregister_netdevice(net);
list_del(&ndev_ctx->list);
rtnl_unlock();
rcu_read_unlock();