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hv_netvsc: fix network namespace issues with VF support 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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 @@ out_unlock:
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();