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hyperv: Add handler for RNDIS_STATUS_NETWORK_CHANGE event 

The RNDIS_STATUS_NETWORK_CHANGE event is received after the Hyper-V host
sleep or hibernation. We refresh network at this time.
MS-TFS: 135162

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang 2014-06-19 18:34:36 -07:00 committed by David S. Miller
parent e0f802fbca
commit 3a494e7103
4 changed files with 30 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/hyperv/hyperv_net.h
View File

@ -170,6 +170,7 @@ struct rndis_device {
enum rndis_device_state state;
bool link_state;
bool link_change;
atomic_t new_req_id;
spinlock_t request_lock;
@ -185,7 +186,7 @@ int netvsc_device_remove(struct hv_device *device);
int netvsc_send(struct hv_device *device,
struct hv_netvsc_packet *packet);
void netvsc_linkstatus_callback(struct hv_device *device_obj,
unsigned int status);
struct rndis_message *resp);
int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *packet,
struct ndis_tcp_ip_checksum_info *csum_info);

30
drivers/net/hyperv/netvsc_drv.c
View File

@ -579,8 +579,9 @@ drop:
* netvsc_linkstatus_callback - Link up/down notification
*/
void netvsc_linkstatus_callback(struct hv_device *device_obj,
unsigned int status)
struct rndis_message *resp)
{
struct rndis_indicate_status *indicate = &resp->msg.indicate_status;
struct net_device *net;
struct net_device_context *ndev_ctx;
struct netvsc_device *net_device;
@ -589,7 +590,19 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
net_device = hv_get_drvdata(device_obj);
rdev = net_device->extension;
rdev->link_state = status != 1;
switch (indicate->status) {
case RNDIS_STATUS_MEDIA_CONNECT:
rdev->link_state = false;
break;
case RNDIS_STATUS_MEDIA_DISCONNECT:
rdev->link_state = true;
break;
case RNDIS_STATUS_NETWORK_CHANGE:
rdev->link_change = true;
break;
default:
return;
}
net = net_device->ndev;
@ -597,7 +610,7 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
return;
ndev_ctx = netdev_priv(net);
if (status == 1) {
if (!rdev->link_state) {
schedule_delayed_work(&ndev_ctx->dwork, 0);
schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20));
} else {
@ -767,7 +780,9 @@ static void netvsc_link_change(struct work_struct *w)
struct net_device *net;
struct netvsc_device *net_device;
struct rndis_device *rdev;
bool notify;
bool notify, refresh = false;
char *argv[] = { "/etc/init.d/network", "restart", NULL };
char *envp[] = { "HOME=/", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
rtnl_lock();
@ -782,10 +797,17 @@ static void netvsc_link_change(struct work_struct *w)
} else {
netif_carrier_on(net);
notify = true;
if (rdev->link_change) {
rdev->link_change = false;
refresh = true;
}
}
rtnl_unlock();
if (refresh)
call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
if (notify)
netdev_notify_peers(net);
}

21
drivers/net/hyperv/rndis_filter.c
View File

@ -320,25 +320,6 @@ static void rndis_filter_receive_response(struct rndis_device *dev,
}
}
static void rndis_filter_receive_indicate_status(struct rndis_device *dev,
struct rndis_message *resp)
{
struct rndis_indicate_status *indicate =
&resp->msg.indicate_status;
if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) {
netvsc_linkstatus_callback(
dev->net_dev->dev, 1);
} else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) {
netvsc_linkstatus_callback(
dev->net_dev->dev, 0);
} else {
/*
* TODO:
*/
}
}
/*
* Get the Per-Packet-Info with the specified type
* return NULL if not found.
@ -464,7 +445,7 @@ int rndis_filter_receive(struct hv_device *dev,
case RNDIS_MSG_INDICATE:
/* notification msgs */
rndis_filter_receive_indicate_status(rndis_dev, rndis_msg);
netvsc_linkstatus_callback(dev, rndis_msg);
break;
default:
netdev_err(ndev,

1
include/linux/rndis.h
View File

@ -65,6 +65,7 @@
#define RNDIS_STATUS_MEDIA_SPECIFIC_INDICATION 0x40010012
#define RNDIS_STATUS_WW_INDICATION RDIA_SPECIFIC_INDICATION
#define RNDIS_STATUS_LINK_SPEED_CHANGE 0x40010013L
#define RNDIS_STATUS_NETWORK_CHANGE 0x40010018
#define RNDIS_STATUS_NOT_RESETTABLE 0x80010001
#define RNDIS_STATUS_SOFT_ERRORS 0x80010003