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|
/*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/highmem.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/nls.h>
#include "hyperv_net.h"
#define RNDIS_EXT_LEN 100
struct rndis_request {
struct list_head list_ent;
struct completion wait_event;
struct rndis_message response_msg;
/*
* The buffer for extended info after the RNDIS response message. It's
* referenced based on the data offset in the RNDIS message. Its size
* is enough for current needs, and should be sufficient for the near
* future.
*/
u8 response_ext[RNDIS_EXT_LEN];
/* Simplify allocation by having a netvsc packet inline */
struct hv_netvsc_packet pkt;
/* Set 2 pages for rndis requests crossing page boundary */
struct hv_page_buffer buf[2];
struct rndis_message request_msg;
/*
* The buffer for the extended info after the RNDIS request message.
* It is referenced and sized in a similar way as response_ext.
*/
u8 request_ext[RNDIS_EXT_LEN];
};
static struct rndis_device *get_rndis_device(void)
{
struct rndis_device *device;
device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
if (!device)
return NULL;
spin_lock_init(&device->request_lock);
INIT_LIST_HEAD(&device->req_list);
device->state = RNDIS_DEV_UNINITIALIZED;
return device;
}
static struct rndis_request *get_rndis_request(struct rndis_device *dev,
u32 msg_type,
u32 msg_len)
{
struct rndis_request *request;
struct rndis_message *rndis_msg;
struct rndis_set_request *set;
unsigned long flags;
request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
if (!request)
return NULL;
init_completion(&request->wait_event);
rndis_msg = &request->request_msg;
rndis_msg->ndis_msg_type = msg_type;
rndis_msg->msg_len = msg_len;
/*
* Set the request id. This field is always after the rndis header for
* request/response packet types so we just used the SetRequest as a
* template
*/
set = &rndis_msg->msg.set_req;
set->req_id = atomic_inc_return(&dev->new_req_id);
/* Add to the request list */
spin_lock_irqsave(&dev->request_lock, flags);
list_add_tail(&request->list_ent, &dev->req_list);
spin_unlock_irqrestore(&dev->request_lock, flags);
return request;
}
static void put_rndis_request(struct rndis_device *dev,
struct rndis_request *req)
{
unsigned long flags;
spin_lock_irqsave(&dev->request_lock, flags);
list_del(&req->list_ent);
spin_unlock_irqrestore(&dev->request_lock, flags);
kfree(req);
}
static void dump_rndis_message(struct hv_device *hv_dev,
struct rndis_message *rndis_msg)
{
struct net_device *netdev;
struct netvsc_device *net_device;
net_device = hv_get_drvdata(hv_dev);
netdev = net_device->ndev;
switch (rndis_msg->ndis_msg_type) {
case RNDIS_MSG_PACKET:
netdev_dbg(netdev, "RNDIS_MSG_PACKET (len %u, "
"data offset %u data len %u, # oob %u, "
"oob offset %u, oob len %u, pkt offset %u, "
"pkt len %u\n",
rndis_msg->msg_len,
rndis_msg->msg.pkt.data_offset,
rndis_msg->msg.pkt.data_len,
rndis_msg->msg.pkt.num_oob_data_elements,
rndis_msg->msg.pkt.oob_data_offset,
rndis_msg->msg.pkt.oob_data_len,
rndis_msg->msg.pkt.per_pkt_info_offset,
rndis_msg->msg.pkt.per_pkt_info_len);
break;
case RNDIS_MSG_INIT_C:
netdev_dbg(netdev, "RNDIS_MSG_INIT_C "
"(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
"device flags %d, max xfer size 0x%x, max pkts %u, "
"pkt aligned %u)\n",
rndis_msg->msg_len,
rndis_msg->msg.init_complete.req_id,
rndis_msg->msg.init_complete.status,
rndis_msg->msg.init_complete.major_ver,
rndis_msg->msg.init_complete.minor_ver,
rndis_msg->msg.init_complete.dev_flags,
rndis_msg->msg.init_complete.max_xfer_size,
rndis_msg->msg.init_complete.
max_pkt_per_msg,
rndis_msg->msg.init_complete.
pkt_alignment_factor);
break;
case RNDIS_MSG_QUERY_C:
netdev_dbg(netdev, "RNDIS_MSG_QUERY_C "
"(len %u, id 0x%x, status 0x%x, buf len %u, "
"buf offset %u)\n",
rndis_msg->msg_len,
rndis_msg->msg.query_complete.req_id,
rndis_msg->msg.query_complete.status,
rndis_msg->msg.query_complete.
info_buflen,
rndis_msg->msg.query_complete.
info_buf_offset);
break;
case RNDIS_MSG_SET_C:
netdev_dbg(netdev,
"RNDIS_MSG_SET_C (len %u, id 0x%x, status 0x%x)\n",
rndis_msg->msg_len,
rndis_msg->msg.set_complete.req_id,
rndis_msg->msg.set_complete.status);
break;
case RNDIS_MSG_INDICATE:
netdev_dbg(netdev, "RNDIS_MSG_INDICATE "
"(len %u, status 0x%x, buf len %u, buf offset %u)\n",
rndis_msg->msg_len,
rndis_msg->msg.indicate_status.status,
rndis_msg->msg.indicate_status.status_buflen,
rndis_msg->msg.indicate_status.status_buf_offset);
break;
default:
netdev_dbg(netdev, "0x%x (len %u)\n",
rndis_msg->ndis_msg_type,
rndis_msg->msg_len);
break;
}
}
static int rndis_filter_send_request(struct rndis_device *dev,
struct rndis_request *req)
{
int ret;
struct hv_netvsc_packet *packet;
/* Setup the packet to send it */
packet = &req->pkt;
packet->is_data_pkt = false;
packet->total_data_buflen = req->request_msg.msg_len;
packet->page_buf_cnt = 1;
packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
PAGE_SHIFT;
packet->page_buf[0].len = req->request_msg.msg_len;
packet->page_buf[0].offset =
(unsigned long)&req->request_msg & (PAGE_SIZE - 1);
/* Add one page_buf when request_msg crossing page boundary */
if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
packet->page_buf_cnt++;
packet->page_buf[0].len = PAGE_SIZE -
packet->page_buf[0].offset;
packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
+ packet->page_buf[0].len) >> PAGE_SHIFT;
packet->page_buf[1].offset = 0;
packet->page_buf[1].len = req->request_msg.msg_len -
packet->page_buf[0].len;
}
packet->completion.send.send_completion = NULL;
ret = netvsc_send(dev->net_dev->dev, packet);
return ret;
}
static void rndis_filter_receive_response(struct rndis_device *dev,
struct rndis_message *resp)
{
struct rndis_request *request = NULL;
bool found = false;
unsigned long flags;
struct net_device *ndev;
ndev = dev->net_dev->ndev;
spin_lock_irqsave(&dev->request_lock, flags);
list_for_each_entry(request, &dev->req_list, list_ent) {
/*
* All request/response message contains RequestId as the 1st
* field
*/
if (request->request_msg.msg.init_req.req_id
== resp->msg.init_complete.req_id) {
found = true;
break;
}
}
spin_unlock_irqrestore(&dev->request_lock, flags);
if (found) {
if (resp->msg_len <=
sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
memcpy(&request->response_msg, resp,
resp->msg_len);
} else {
netdev_err(ndev,
"rndis response buffer overflow "
"detected (size %u max %zu)\n",
resp->msg_len,
sizeof(struct rndis_message));
if (resp->ndis_msg_type ==
RNDIS_MSG_RESET_C) {
/* does not have a request id field */
request->response_msg.msg.reset_complete.
status = RNDIS_STATUS_BUFFER_OVERFLOW;
} else {
request->response_msg.msg.
init_complete.status =
RNDIS_STATUS_BUFFER_OVERFLOW;
}
}
complete(&request->wait_event);
} else {
netdev_err(ndev,
"no rndis request found for this response "
"(id 0x%x res type 0x%x)\n",
resp->msg.init_complete.req_id,
resp->ndis_msg_type);
}
}
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.
*/
static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type)
{
struct rndis_per_packet_info *ppi;
int len;
if (rpkt->per_pkt_info_offset == 0)
return NULL;
ppi = (struct rndis_per_packet_info *)((ulong)rpkt +
rpkt->per_pkt_info_offset);
len = rpkt->per_pkt_info_len;
while (len > 0) {
if (ppi->type == type)
return (void *)((ulong)ppi + ppi->ppi_offset);
len -= ppi->size;
ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size);
}
return NULL;
}
static void rndis_filter_receive_data(struct rndis_device *dev,
struct rndis_message *msg,
struct hv_netvsc_packet *pkt)
{
struct rndis_packet *rndis_pkt;
u32 data_offset;
struct ndis_pkt_8021q_info *vlan;
rndis_pkt = &msg->msg.pkt;
/* Remove the rndis header and pass it back up the stack */
data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
pkt->total_data_buflen -= data_offset;
/*
* Make sure we got a valid RNDIS message, now total_data_buflen
* should be the data packet size plus the trailer padding size
*/
if (pkt->total_data_buflen < rndis_pkt->data_len) {
netdev_err(dev->net_dev->ndev, "rndis message buffer "
"overflow detected (got %u, min %u)"
"...dropping this message!\n",
pkt->total_data_buflen, rndis_pkt->data_len);
return;
}
/*
* Remove the rndis trailer padding from rndis packet message
* rndis_pkt->data_len tell us the real data length, we only copy
* the data packet to the stack, without the rndis trailer padding
*/
pkt->total_data_buflen = rndis_pkt->data_len;
pkt->data = (void *)((unsigned long)pkt->data + data_offset);
pkt->is_data_pkt = true;
vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO);
if (vlan) {
pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid |
(vlan->pri << VLAN_PRIO_SHIFT);
} else {
pkt->vlan_tci = 0;
}
netvsc_recv_callback(dev->net_dev->dev, pkt);
}
int rndis_filter_receive(struct hv_device *dev,
struct hv_netvsc_packet *pkt)
{
struct netvsc_device *net_dev = hv_get_drvdata(dev);
struct rndis_device *rndis_dev;
struct rndis_message *rndis_msg;
struct net_device *ndev;
int ret = 0;
if (!net_dev) {
ret = -EINVAL;
goto exit;
}
ndev = net_dev->ndev;
/* Make sure the rndis device state is initialized */
if (!net_dev->extension) {
netdev_err(ndev, "got rndis message but no rndis device - "
"dropping this message!\n");
ret = -ENODEV;
goto exit;
}
rndis_dev = (struct rndis_device *)net_dev->extension;
if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
netdev_err(ndev, "got rndis message but rndis device "
"uninitialized...dropping this message!\n");
ret = -ENODEV;
goto exit;
}
rndis_msg = pkt->data;
dump_rndis_message(dev, rndis_msg);
switch (rndis_msg->ndis_msg_type) {
case RNDIS_MSG_PACKET:
/* data msg */
rndis_filter_receive_data(rndis_dev, rndis_msg, pkt);
break;
case RNDIS_MSG_INIT_C:
case RNDIS_MSG_QUERY_C:
case RNDIS_MSG_SET_C:
/* completion msgs */
rndis_filter_receive_response(rndis_dev, rndis_msg);
break;
case RNDIS_MSG_INDICATE:
/* notification msgs */
rndis_filter_receive_indicate_status(rndis_dev, rndis_msg);
break;
default:
netdev_err(ndev,
"unhandled rndis message (type %u len %u)\n",
rndis_msg->ndis_msg_type,
rndis_msg->msg_len);
break;
}
exit:
if (ret != 0)
pkt->status = NVSP_STAT_FAIL;
return ret;
}
static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
void *result, u32 *result_size)
{
struct rndis_request *request;
u32 inresult_size = *result_size;
struct rndis_query_request *query;
struct rndis_query_complete *query_complete;
int ret = 0;
int t;
if (!result)
return -EINVAL;
*result_size = 0;
request = get_rndis_request(dev, RNDIS_MSG_QUERY,
RNDIS_MESSAGE_SIZE(struct rndis_query_request));
if (!request) {
ret = -ENOMEM;
goto cleanup;
}
/* Setup the rndis query */
query = &request->request_msg.msg.query_req;
query->oid = oid;
query->info_buf_offset = sizeof(struct rndis_query_request);
query->info_buflen = 0;
query->dev_vc_handle = 0;
ret = rndis_filter_send_request(dev, request);
if (ret != 0)
goto cleanup;
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
if (t == 0) {
ret = -ETIMEDOUT;
goto cleanup;
}
/* Copy the response back */
query_complete = &request->response_msg.msg.query_complete;
if (query_complete->info_buflen > inresult_size) {
ret = -1;
goto cleanup;
}
memcpy(result,
(void *)((unsigned long)query_complete +
query_complete->info_buf_offset),
query_complete->info_buflen);
*result_size = query_complete->info_buflen;
cleanup:
if (request)
put_rndis_request(dev, request);
return ret;
}
static int rndis_filter_query_device_mac(struct rndis_device *dev)
{
u32 size = ETH_ALEN;
return rndis_filter_query_device(dev,
RNDIS_OID_802_3_PERMANENT_ADDRESS,
dev->hw_mac_adr, &size);
}
#define NWADR_STR "NetworkAddress"
#define NWADR_STRLEN 14
int rndis_filter_set_device_mac(struct hv_device *hdev, char *mac)
{
struct netvsc_device *nvdev = hv_get_drvdata(hdev);
struct rndis_device *rdev = nvdev->extension;
struct net_device *ndev = nvdev->ndev;
struct rndis_request *request;
struct rndis_set_request *set;
struct rndis_config_parameter_info *cpi;
wchar_t *cfg_nwadr, *cfg_mac;
struct rndis_set_complete *set_complete;
char macstr[2*ETH_ALEN+1];
u32 extlen = sizeof(struct rndis_config_parameter_info) +
2*NWADR_STRLEN + 4*ETH_ALEN;
int ret, t;
request = get_rndis_request(rdev, RNDIS_MSG_SET,
RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
if (!request)
return -ENOMEM;
set = &request->request_msg.msg.set_req;
set->oid = RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER;
set->info_buflen = extlen;
set->info_buf_offset = sizeof(struct rndis_set_request);
set->dev_vc_handle = 0;
cpi = (struct rndis_config_parameter_info *)((ulong)set +
set->info_buf_offset);
cpi->parameter_name_offset =
sizeof(struct rndis_config_parameter_info);
/* Multiply by 2 because host needs 2 bytes (utf16) for each char */
cpi->parameter_name_length = 2*NWADR_STRLEN;
cpi->parameter_type = RNDIS_CONFIG_PARAM_TYPE_STRING;
cpi->parameter_value_offset =
cpi->parameter_name_offset + cpi->parameter_name_length;
/* Multiply by 4 because each MAC byte displayed as 2 utf16 chars */
cpi->parameter_value_length = 4*ETH_ALEN;
cfg_nwadr = (wchar_t *)((ulong)cpi + cpi->parameter_name_offset);
cfg_mac = (wchar_t *)((ulong)cpi + cpi->parameter_value_offset);
ret = utf8s_to_utf16s(NWADR_STR, NWADR_STRLEN, UTF16_HOST_ENDIAN,
cfg_nwadr, NWADR_STRLEN);
if (ret < 0)
goto cleanup;
snprintf(macstr, 2*ETH_ALEN+1, "%pm", mac);
ret = utf8s_to_utf16s(macstr, 2*ETH_ALEN, UTF16_HOST_ENDIAN,
cfg_mac, 2*ETH_ALEN);
if (ret < 0)
goto cleanup;
ret = rndis_filter_send_request(rdev, request);
if (ret != 0)
goto cleanup;
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
if (t == 0) {
netdev_err(ndev, "timeout before we got a set response...\n");
/*
* can't put_rndis_request, since we may still receive a
* send-completion.
*/
return -EBUSY;
} else {
set_complete = &request->response_msg.msg.set_complete;
if (set_complete->status != RNDIS_STATUS_SUCCESS) {
netdev_err(ndev, "Fail to set MAC on host side:0x%x\n",
set_complete->status);
ret = -EINVAL;
}
}
cleanup:
put_rndis_request(rdev, request);
return ret;
}
static int rndis_filter_query_device_link_status(struct rndis_device *dev)
{
u32 size = sizeof(u32);
u32 link_status;
int ret;
ret = rndis_filter_query_device(dev,
RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
&link_status, &size);
dev->link_state = (link_status != 0) ? true : false;
return ret;
}
int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter)
{
struct rndis_request *request;
struct rndis_set_request *set;
struct rndis_set_complete *set_complete;
u32 status;
int ret, t;
struct net_device *ndev;
ndev = dev->net_dev->ndev;
request = get_rndis_request(dev, RNDIS_MSG_SET,
RNDIS_MESSAGE_SIZE(struct rndis_set_request) +
sizeof(u32));
if (!request) {
ret = -ENOMEM;
goto cleanup;
}
/* Setup the rndis set */
set = &request->request_msg.msg.set_req;
set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER;
set->info_buflen = sizeof(u32);
set->info_buf_offset = sizeof(struct rndis_set_request);
memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request),
&new_filter, sizeof(u32));
ret = rndis_filter_send_request(dev, request);
if (ret != 0)
goto cleanup;
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
if (t == 0) {
netdev_err(ndev,
"timeout before we got a set response...\n");
ret = -ETIMEDOUT;
/*
* We can't deallocate the request since we may still receive a
* send completion for it.
*/
goto exit;
} else {
set_complete = &request->response_msg.msg.set_complete;
status = set_complete->status;
}
cleanup:
if (request)
put_rndis_request(dev, request);
exit:
return ret;
}
static int rndis_filter_init_device(struct rndis_device *dev)
{
struct rndis_request *request;
struct rndis_initialize_request *init;
struct rndis_initialize_complete *init_complete;
u32 status;
int ret, t;
request = get_rndis_request(dev, RNDIS_MSG_INIT,
RNDIS_MESSAGE_SIZE(struct rndis_initialize_request));
if (!request) {
ret = -ENOMEM;
goto cleanup;
}
/* Setup the rndis set */
init = &request->request_msg.msg.init_req;
init->major_ver = RNDIS_MAJOR_VERSION;
init->minor_ver = RNDIS_MINOR_VERSION;
init->max_xfer_size = 0x4000;
dev->state = RNDIS_DEV_INITIALIZING;
ret = rndis_filter_send_request(dev, request);
if (ret != 0) {
dev->state = RNDIS_DEV_UNINITIALIZED;
goto cleanup;
}
t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
if (t == 0) {
ret = -ETIMEDOUT;
goto cleanup;
}
init_complete = &request->response_msg.msg.init_complete;
status = init_complete->status;
if (status == RNDIS_STATUS_SUCCESS) {
dev->state = RNDIS_DEV_INITIALIZED;
ret = 0;
} else {
dev->state = RNDIS_DEV_UNINITIALIZED;
ret = -EINVAL;
}
cleanup:
if (request)
put_rndis_request(dev, request);
return ret;
}
static void rndis_filter_halt_device(struct rndis_device *dev)
{
struct rndis_request *request;
struct rndis_halt_request *halt;
struct netvsc_device *nvdev = dev->net_dev;
struct hv_device *hdev = nvdev->dev;
ulong flags;
/* Attempt to do a rndis device halt */
request = get_rndis_request(dev, RNDIS_MSG_HALT,
RNDIS_MESSAGE_SIZE(struct rndis_halt_request));
if (!request)
goto cleanup;
/* Setup the rndis set */
halt = &request->request_msg.msg.halt_req;
halt->req_id = atomic_inc_return(&dev->new_req_id);
/* Ignore return since this msg is optional. */
rndis_filter_send_request(dev, request);
dev->state = RNDIS_DEV_UNINITIALIZED;
cleanup:
spin_lock_irqsave(&hdev->channel->inbound_lock, flags);
nvdev->destroy = true;
spin_unlock_irqrestore(&hdev->channel->inbound_lock, flags);
/* Wait for all send completions */
wait_event(nvdev->wait_drain,
atomic_read(&nvdev->num_outstanding_sends) == 0);
if (request)
put_rndis_request(dev, request);
return;
}
static int rndis_filter_open_device(struct rndis_device *dev)
{
int ret;
if (dev->state != RNDIS_DEV_INITIALIZED)
return 0;
ret = rndis_filter_set_packet_filter(dev,
NDIS_PACKET_TYPE_BROADCAST |
NDIS_PACKET_TYPE_ALL_MULTICAST |
NDIS_PACKET_TYPE_DIRECTED);
if (ret == 0)
dev->state = RNDIS_DEV_DATAINITIALIZED;
return ret;
}
static int rndis_filter_close_device(struct rndis_device *dev)
{
int ret;
if (dev->state != RNDIS_DEV_DATAINITIALIZED)
return 0;
ret = rndis_filter_set_packet_filter(dev, 0);
if (ret == 0)
dev->state = RNDIS_DEV_INITIALIZED;
return ret;
}
int rndis_filter_device_add(struct hv_device *dev,
void *additional_info)
{
int ret;
struct netvsc_device *net_device;
struct rndis_device *rndis_device;
struct netvsc_device_info *device_info = additional_info;
rndis_device = get_rndis_device();
if (!rndis_device)
return -ENODEV;
/*
* Let the inner driver handle this first to create the netvsc channel
* NOTE! Once the channel is created, we may get a receive callback
* (RndisFilterOnReceive()) before this call is completed
*/
ret = netvsc_device_add(dev, additional_info);
if (ret != 0) {
kfree(rndis_device);
return ret;
}
/* Initialize the rndis device */
net_device = hv_get_drvdata(dev);
net_device->extension = rndis_device;
rndis_device->net_dev = net_device;
/* Send the rndis initialization message */
ret = rndis_filter_init_device(rndis_device);
if (ret != 0) {
rndis_filter_device_remove(dev);
return ret;
}
/* Get the mac address */
ret = rndis_filter_query_device_mac(rndis_device);
if (ret != 0) {
rndis_filter_device_remove(dev);
return ret;
}
memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN);
rndis_filter_query_device_link_status(rndis_device);
device_info->link_state = rndis_device->link_state;
dev_info(&dev->device, "Device MAC %pM link state %s\n",
rndis_device->hw_mac_adr,
device_info->link_state ? "down" : "up");
return ret;
}
void rndis_filter_device_remove(struct hv_device *dev)
{
struct netvsc_device *net_dev = hv_get_drvdata(dev);
struct rndis_device *rndis_dev = net_dev->extension;
/* Halt and release the rndis device */
rndis_filter_halt_device(rndis_dev);
kfree(rndis_dev);
net_dev->extension = NULL;
netvsc_device_remove(dev);
}
int rndis_filter_open(struct hv_device *dev)
{
struct netvsc_device *net_device = hv_get_drvdata(dev);
if (!net_device)
return -EINVAL;
return rndis_filter_open_device(net_device->extension);
}
int rndis_filter_close(struct hv_device *dev)
{
struct netvsc_device *nvdev = hv_get_drvdata(dev);
if (!nvdev)
return -EINVAL;
return rndis_filter_close_device(nvdev->extension);
}
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