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OpenCloudOS-Kernel
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netvsc: delay setup of VF device 

When VF device is discovered, delay bring it automatically up in
order to allow userspace to some simple changes (like renaming).

Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2017-08-09 17:46:03 -07:00 committed by David S. Miller
parent d18c2a1b15
commit 6123c66854
2 changed files with 9 additions and 8 deletions
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2
drivers/net/hyperv/hyperv_net.h
View File

@ -723,7 +723,7 @@ struct net_device_context {
/* State to manage the associated VF interface. */
struct net_device __rcu *vf_netdev;
struct netvsc_vf_pcpu_stats __percpu *vf_stats;
struct work_struct vf_takeover;
struct delayed_work vf_takeover;
/* 1: allocated, serial number is valid. 0: not allocated */
u32 vf_alloc;

15
drivers/net/hyperv/netvsc_drv.c
View File

@ -47,6 +47,7 @@
#define RING_SIZE_MIN 64
#define LINKCHANGE_INT (2 * HZ)
#define VF_TAKEOVER_INT (HZ / 10)
static int ring_size = 128;
module_param(ring_size, int, S_IRUGO);
@ -1559,7 +1560,9 @@ static int netvsc_vf_join(struct net_device *vf_netdev,
/* set slave flag before open to prevent IPv6 addrconf */
vf_netdev->flags |= IFF_SLAVE;
schedule_work(&ndev_ctx->vf_takeover);
schedule_delayed_work(&ndev_ctx->vf_takeover, VF_TAKEOVER_INT);
call_netdevice_notifiers(NETDEV_JOIN, vf_netdev);
netdev_info(vf_netdev, "joined to %s\n", ndev->name);
return 0;
@ -1575,8 +1578,6 @@ static void __netvsc_vf_setup(struct net_device *ndev,
{
int ret;
call_netdevice_notifiers(NETDEV_JOIN, vf_netdev);
/* Align MTU of VF with master */
ret = dev_set_mtu(vf_netdev, ndev->mtu);
if (ret)
@ -1597,12 +1598,12 @@ static void __netvsc_vf_setup(struct net_device *ndev,
static void netvsc_vf_setup(struct work_struct *w)
{
struct net_device_context *ndev_ctx
= container_of(w, struct net_device_context, vf_takeover);
= container_of(w, struct net_device_context, vf_takeover.work);
struct net_device *ndev = hv_get_drvdata(ndev_ctx->device_ctx);
struct net_device *vf_netdev;
if (!rtnl_trylock()) {
schedule_work(w);
schedule_delayed_work(&ndev_ctx->vf_takeover, 0);
return;
}
@ -1706,7 +1707,7 @@ static int netvsc_unregister_vf(struct net_device *vf_netdev)
return NOTIFY_DONE;
net_device_ctx = netdev_priv(ndev);
cancel_work_sync(&net_device_ctx->vf_takeover);
cancel_delayed_work_sync(&net_device_ctx->vf_takeover);
netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name);
@ -1748,7 +1749,7 @@ static int netvsc_probe(struct hv_device *dev,
spin_lock_init(&net_device_ctx->lock);
INIT_LIST_HEAD(&net_device_ctx->reconfig_events);
INIT_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup);
INIT_DELAYED_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup);
net_device_ctx->vf_stats
= netdev_alloc_pcpu_stats(struct netvsc_vf_pcpu_stats);