static int netvsc_open(struct net_device *net)
{
struct netvsc_device *nvdev = net_device_to_netvsc_device(net);
struct rndis_device *rdev;
int ret = 0;
netif_carrier_off(net);
/* Open up the device */
ret = rndis_filter_open(nvdev);
if (ret != 0) {
netdev_err(net, "unable to open device (ret %d).\n", ret);
return ret;
}
netif_tx_wake_all_queues(net);
rdev = nvdev->extension;
if (!rdev->link_state)
netif_carrier_on(net);
return ret;
}
static int netvsc_destroy_buf(struct hv_device *device)
{
struct nvsp_message *revoke_packet;
int ret = 0;
struct net_device *ndev = hv_get_drvdata(device);
struct netvsc_device *net_device = net_device_to_netvsc_device(ndev);
/*
* If we got a section count, it means we received a
* SendReceiveBufferComplete msg (ie sent
* NvspMessage1TypeSendReceiveBuffer msg) therefore, we need
* to send a revoke msg here
*/
if (net_device->recv_section_cnt) {
/* Send the revoke receive buffer */
revoke_packet = &net_device->revoke_packet;
memset(revoke_packet, 0, sizeof(struct nvsp_message));
revoke_packet->hdr.msg_type =
NVSP_MSG1_TYPE_REVOKE_RECV_BUF;
revoke_packet->msg.v1_msg.
revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;
ret = vmbus_sendpacket(device->channel,
revoke_packet,
sizeof(struct nvsp_message),
(unsigned long)revoke_packet,
VM_PKT_DATA_INBAND, 0);
/*
* If we failed here, we might as well return and
* have a leak rather than continue and a bugchk
*/
if (ret != 0) {
netdev_err(ndev, "unable to send "
"revoke receive buffer to netvsp\n");
return ret;
}
}
/* Teardown the gpadl on the vsp end */
if (net_device->recv_buf_gpadl_handle) {
ret = vmbus_teardown_gpadl(device->channel,
net_device->recv_buf_gpadl_handle);
/* If we failed here, we might as well return and have a leak
* rather than continue and a bugchk
*/
if (ret != 0) {
netdev_err(ndev,
"unable to teardown receive buffer's gpadl\n");
return ret;
}
net_device->recv_buf_gpadl_handle = 0;
}
if (net_device->recv_buf) {
/* Free up the receive buffer */
vfree(net_device->recv_buf);
net_device->recv_buf = NULL;
}
if (net_device->recv_section) {
net_device->recv_section_cnt = 0;
kfree(net_device->recv_section);
net_device->recv_section = NULL;
}
/* Deal with the send buffer we may have setup.
* If we got a send section size, it means we received a
* NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent
* NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need
* to send a revoke msg here
*/
if (net_device->send_section_size) {
/* Send the revoke receive buffer */
revoke_packet = &net_device->revoke_packet;
memset(revoke_packet, 0, sizeof(struct nvsp_message));
revoke_packet->hdr.msg_type =
NVSP_MSG1_TYPE_REVOKE_SEND_BUF;
revoke_packet->msg.v1_msg.revoke_send_buf.id =
NETVSC_SEND_BUFFER_ID;
ret = vmbus_sendpacket(device->channel,
revoke_packet,
sizeof(struct nvsp_message),
(unsigned long)revoke_packet,
VM_PKT_DATA_INBAND, 0);
/* If we failed here, we might as well return and
* have a leak rather than continue and a bugchk
*/
if (ret != 0) {
netdev_err(ndev, "unable to send "
"revoke send buffer to netvsp\n");
return ret;
}
}
/* Teardown the gpadl on the vsp end */
if (net_device->send_buf_gpadl_handle) {
ret = vmbus_teardown_gpadl(device->channel,
net_device->send_buf_gpadl_handle);
/* If we failed here, we might as well return and have a leak
* rather than continue and a bugchk
*/
if (ret != 0) {
netdev_err(ndev,
"unable to teardown send buffer's gpadl\n");
return ret;
}
net_device->send_buf_gpadl_handle = 0;
}
if (net_device->send_buf) {
/* Free up the send buffer */
vfree(net_device->send_buf);
net_device->send_buf = NULL;
}
kfree(net_device->send_section_map);
return ret;
}
