856 lines
21 KiB
C
856 lines
21 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/highmem.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include "hyperv_net.h"
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enum rndis_device_state {
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RNDIS_DEV_UNINITIALIZED = 0,
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RNDIS_DEV_INITIALIZING,
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RNDIS_DEV_INITIALIZED,
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RNDIS_DEV_DATAINITIALIZED,
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};
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struct rndis_device {
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struct netvsc_device *net_dev;
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enum rndis_device_state state;
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bool link_state;
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atomic_t new_req_id;
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spinlock_t request_lock;
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struct list_head req_list;
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unsigned char hw_mac_adr[ETH_ALEN];
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};
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struct rndis_request {
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struct list_head list_ent;
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struct completion wait_event;
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/*
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* FIXME: We assumed a fixed size response here. If we do ever need to
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* handle a bigger response, we can either define a max response
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* message or add a response buffer variable above this field
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*/
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struct rndis_message response_msg;
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/* Simplify allocation by having a netvsc packet inline */
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struct hv_netvsc_packet pkt;
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struct hv_page_buffer buf;
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/* FIXME: We assumed a fixed size request here. */
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struct rndis_message request_msg;
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};
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static void rndis_filter_send_completion(void *ctx);
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static void rndis_filter_send_request_completion(void *ctx);
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static struct rndis_device *get_rndis_device(void)
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{
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struct rndis_device *device;
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device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL);
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if (!device)
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return NULL;
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spin_lock_init(&device->request_lock);
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INIT_LIST_HEAD(&device->req_list);
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device->state = RNDIS_DEV_UNINITIALIZED;
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return device;
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}
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static struct rndis_request *get_rndis_request(struct rndis_device *dev,
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u32 msg_type,
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u32 msg_len)
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{
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struct rndis_request *request;
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struct rndis_message *rndis_msg;
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struct rndis_set_request *set;
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unsigned long flags;
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request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL);
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if (!request)
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return NULL;
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init_completion(&request->wait_event);
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rndis_msg = &request->request_msg;
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rndis_msg->ndis_msg_type = msg_type;
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rndis_msg->msg_len = msg_len;
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/*
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* Set the request id. This field is always after the rndis header for
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* request/response packet types so we just used the SetRequest as a
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* template
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*/
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set = &rndis_msg->msg.set_req;
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set->req_id = atomic_inc_return(&dev->new_req_id);
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/* Add to the request list */
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spin_lock_irqsave(&dev->request_lock, flags);
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list_add_tail(&request->list_ent, &dev->req_list);
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spin_unlock_irqrestore(&dev->request_lock, flags);
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return request;
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}
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static void put_rndis_request(struct rndis_device *dev,
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struct rndis_request *req)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->request_lock, flags);
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list_del(&req->list_ent);
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spin_unlock_irqrestore(&dev->request_lock, flags);
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kfree(req);
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}
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static void dump_rndis_message(struct hv_device *hv_dev,
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struct rndis_message *rndis_msg)
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{
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struct net_device *netdev;
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struct netvsc_device *net_device;
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net_device = hv_get_drvdata(hv_dev);
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netdev = net_device->ndev;
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switch (rndis_msg->ndis_msg_type) {
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case REMOTE_NDIS_PACKET_MSG:
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netdev_dbg(netdev, "REMOTE_NDIS_PACKET_MSG (len %u, "
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"data offset %u data len %u, # oob %u, "
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"oob offset %u, oob len %u, pkt offset %u, "
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"pkt len %u\n",
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rndis_msg->msg_len,
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rndis_msg->msg.pkt.data_offset,
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rndis_msg->msg.pkt.data_len,
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rndis_msg->msg.pkt.num_oob_data_elements,
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rndis_msg->msg.pkt.oob_data_offset,
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rndis_msg->msg.pkt.oob_data_len,
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rndis_msg->msg.pkt.per_pkt_info_offset,
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rndis_msg->msg.pkt.per_pkt_info_len);
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break;
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case REMOTE_NDIS_INITIALIZE_CMPLT:
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netdev_dbg(netdev, "REMOTE_NDIS_INITIALIZE_CMPLT "
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"(len %u, id 0x%x, status 0x%x, major %d, minor %d, "
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"device flags %d, max xfer size 0x%x, max pkts %u, "
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"pkt aligned %u)\n",
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rndis_msg->msg_len,
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rndis_msg->msg.init_complete.req_id,
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rndis_msg->msg.init_complete.status,
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rndis_msg->msg.init_complete.major_ver,
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rndis_msg->msg.init_complete.minor_ver,
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rndis_msg->msg.init_complete.dev_flags,
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rndis_msg->msg.init_complete.max_xfer_size,
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rndis_msg->msg.init_complete.
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max_pkt_per_msg,
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rndis_msg->msg.init_complete.
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pkt_alignment_factor);
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break;
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case REMOTE_NDIS_QUERY_CMPLT:
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netdev_dbg(netdev, "REMOTE_NDIS_QUERY_CMPLT "
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"(len %u, id 0x%x, status 0x%x, buf len %u, "
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"buf offset %u)\n",
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rndis_msg->msg_len,
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rndis_msg->msg.query_complete.req_id,
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rndis_msg->msg.query_complete.status,
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rndis_msg->msg.query_complete.
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info_buflen,
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rndis_msg->msg.query_complete.
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info_buf_offset);
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break;
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case REMOTE_NDIS_SET_CMPLT:
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netdev_dbg(netdev,
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"REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)\n",
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rndis_msg->msg_len,
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rndis_msg->msg.set_complete.req_id,
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rndis_msg->msg.set_complete.status);
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break;
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case REMOTE_NDIS_INDICATE_STATUS_MSG:
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netdev_dbg(netdev, "REMOTE_NDIS_INDICATE_STATUS_MSG "
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"(len %u, status 0x%x, buf len %u, buf offset %u)\n",
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rndis_msg->msg_len,
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rndis_msg->msg.indicate_status.status,
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rndis_msg->msg.indicate_status.status_buflen,
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rndis_msg->msg.indicate_status.status_buf_offset);
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break;
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default:
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netdev_dbg(netdev, "0x%x (len %u)\n",
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rndis_msg->ndis_msg_type,
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rndis_msg->msg_len);
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break;
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}
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}
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static int rndis_filter_send_request(struct rndis_device *dev,
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struct rndis_request *req)
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{
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int ret;
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struct hv_netvsc_packet *packet;
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/* Setup the packet to send it */
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packet = &req->pkt;
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packet->is_data_pkt = false;
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packet->total_data_buflen = req->request_msg.msg_len;
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packet->page_buf_cnt = 1;
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packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
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PAGE_SHIFT;
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packet->page_buf[0].len = req->request_msg.msg_len;
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packet->page_buf[0].offset =
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(unsigned long)&req->request_msg & (PAGE_SIZE - 1);
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packet->completion.send.send_completion_ctx = req;/* packet; */
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packet->completion.send.send_completion =
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rndis_filter_send_request_completion;
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packet->completion.send.send_completion_tid = (unsigned long)dev;
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ret = netvsc_send(dev->net_dev->dev, packet);
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return ret;
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}
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static void rndis_filter_receive_response(struct rndis_device *dev,
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struct rndis_message *resp)
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{
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struct rndis_request *request = NULL;
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bool found = false;
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unsigned long flags;
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struct net_device *ndev;
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ndev = dev->net_dev->ndev;
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spin_lock_irqsave(&dev->request_lock, flags);
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list_for_each_entry(request, &dev->req_list, list_ent) {
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/*
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* All request/response message contains RequestId as the 1st
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* field
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*/
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if (request->request_msg.msg.init_req.req_id
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== resp->msg.init_complete.req_id) {
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found = true;
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break;
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}
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}
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spin_unlock_irqrestore(&dev->request_lock, flags);
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if (found) {
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if (resp->msg_len <= sizeof(struct rndis_message)) {
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memcpy(&request->response_msg, resp,
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resp->msg_len);
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} else {
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netdev_err(ndev,
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"rndis response buffer overflow "
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"detected (size %u max %zu)\n",
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resp->msg_len,
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sizeof(struct rndis_filter_packet));
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if (resp->ndis_msg_type ==
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REMOTE_NDIS_RESET_CMPLT) {
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/* does not have a request id field */
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request->response_msg.msg.reset_complete.
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status = STATUS_BUFFER_OVERFLOW;
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} else {
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request->response_msg.msg.
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init_complete.status =
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STATUS_BUFFER_OVERFLOW;
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}
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}
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complete(&request->wait_event);
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} else {
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netdev_err(ndev,
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"no rndis request found for this response "
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"(id 0x%x res type 0x%x)\n",
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resp->msg.init_complete.req_id,
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resp->ndis_msg_type);
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}
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}
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static void rndis_filter_receive_indicate_status(struct rndis_device *dev,
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struct rndis_message *resp)
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{
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struct rndis_indicate_status *indicate =
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&resp->msg.indicate_status;
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if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) {
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netvsc_linkstatus_callback(
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dev->net_dev->dev, 1);
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} else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) {
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netvsc_linkstatus_callback(
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dev->net_dev->dev, 0);
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} else {
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/*
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* TODO:
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*/
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}
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}
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static void rndis_filter_receive_data(struct rndis_device *dev,
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struct rndis_message *msg,
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struct hv_netvsc_packet *pkt)
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{
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struct rndis_packet *rndis_pkt;
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u32 data_offset;
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int i;
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rndis_pkt = &msg->msg.pkt;
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/*
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* FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this
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* netvsc packet (ie TotalDataBufferLength != MessageLength)
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*/
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/* Remove the rndis header and pass it back up the stack */
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data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset;
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pkt->total_data_buflen -= data_offset;
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pkt->page_buf[0].offset += data_offset;
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pkt->page_buf[0].len -= data_offset;
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/* Drop the 0th page, if rndis data go beyond page boundary */
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if (pkt->page_buf[0].offset >= PAGE_SIZE) {
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pkt->page_buf[1].offset = pkt->page_buf[0].offset - PAGE_SIZE;
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pkt->page_buf[1].len -= pkt->page_buf[1].offset;
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pkt->page_buf_cnt--;
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for (i = 0; i < pkt->page_buf_cnt; i++)
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pkt->page_buf[i] = pkt->page_buf[i+1];
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}
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pkt->is_data_pkt = true;
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netvsc_recv_callback(dev->net_dev->dev, pkt);
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}
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int rndis_filter_receive(struct hv_device *dev,
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struct hv_netvsc_packet *pkt)
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{
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struct netvsc_device *net_dev = hv_get_drvdata(dev);
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struct rndis_device *rndis_dev;
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struct rndis_message rndis_msg;
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struct rndis_message *rndis_hdr;
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struct net_device *ndev;
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if (!net_dev)
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return -EINVAL;
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ndev = net_dev->ndev;
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/* Make sure the rndis device state is initialized */
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if (!net_dev->extension) {
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netdev_err(ndev, "got rndis message but no rndis device - "
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"dropping this message!\n");
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return -ENODEV;
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}
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rndis_dev = (struct rndis_device *)net_dev->extension;
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if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
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netdev_err(ndev, "got rndis message but rndis device "
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"uninitialized...dropping this message!\n");
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return -ENODEV;
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}
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rndis_hdr = (struct rndis_message *)kmap_atomic(
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pfn_to_page(pkt->page_buf[0].pfn), KM_IRQ0);
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rndis_hdr = (void *)((unsigned long)rndis_hdr +
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pkt->page_buf[0].offset);
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/* Make sure we got a valid rndis message */
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if ((rndis_hdr->ndis_msg_type != REMOTE_NDIS_PACKET_MSG) &&
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(rndis_hdr->msg_len > sizeof(struct rndis_message))) {
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netdev_err(ndev, "incoming rndis message buffer overflow "
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"detected (got %u, max %zu)..marking it an error!\n",
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rndis_hdr->msg_len,
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sizeof(struct rndis_message));
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}
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memcpy(&rndis_msg, rndis_hdr,
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(rndis_hdr->msg_len > sizeof(struct rndis_message)) ?
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sizeof(struct rndis_message) :
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rndis_hdr->msg_len);
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kunmap_atomic(rndis_hdr - pkt->page_buf[0].offset, KM_IRQ0);
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dump_rndis_message(dev, &rndis_msg);
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switch (rndis_msg.ndis_msg_type) {
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case REMOTE_NDIS_PACKET_MSG:
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/* data msg */
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rndis_filter_receive_data(rndis_dev, &rndis_msg, pkt);
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break;
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case REMOTE_NDIS_INITIALIZE_CMPLT:
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case REMOTE_NDIS_QUERY_CMPLT:
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case REMOTE_NDIS_SET_CMPLT:
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/* completion msgs */
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rndis_filter_receive_response(rndis_dev, &rndis_msg);
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break;
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case REMOTE_NDIS_INDICATE_STATUS_MSG:
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/* notification msgs */
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rndis_filter_receive_indicate_status(rndis_dev, &rndis_msg);
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break;
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default:
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netdev_err(ndev,
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"unhandled rndis message (type %u len %u)\n",
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rndis_msg.ndis_msg_type,
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rndis_msg.msg_len);
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break;
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}
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return 0;
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}
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static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
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void *result, u32 *result_size)
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{
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struct rndis_request *request;
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u32 inresult_size = *result_size;
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struct rndis_query_request *query;
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struct rndis_query_complete *query_complete;
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int ret = 0;
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int t;
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if (!result)
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return -EINVAL;
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*result_size = 0;
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request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG,
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RNDIS_MESSAGE_SIZE(struct rndis_query_request));
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if (!request) {
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ret = -ENOMEM;
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goto cleanup;
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}
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/* Setup the rndis query */
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query = &request->request_msg.msg.query_req;
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query->oid = oid;
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query->info_buf_offset = sizeof(struct rndis_query_request);
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query->info_buflen = 0;
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query->dev_vc_handle = 0;
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ret = rndis_filter_send_request(dev, request);
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if (ret != 0)
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goto cleanup;
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t = wait_for_completion_timeout(&request->wait_event, 5*HZ);
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if (t == 0) {
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ret = -ETIMEDOUT;
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goto cleanup;
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}
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/* Copy the response back */
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query_complete = &request->response_msg.msg.query_complete;
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if (query_complete->info_buflen > inresult_size) {
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ret = -1;
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goto cleanup;
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}
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memcpy(result,
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(void *)((unsigned long)query_complete +
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query_complete->info_buf_offset),
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query_complete->info_buflen);
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*result_size = query_complete->info_buflen;
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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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static 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, REMOTE_NDIS_SET_MSG,
|
|
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");
|
|
/*
|
|
* 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, REMOTE_NDIS_INITIALIZE_MSG,
|
|
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;
|
|
/* FIXME: Use 1536 - rounded ethernet frame size */
|
|
init->max_xfer_size = 2048;
|
|
|
|
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;
|
|
|
|
/* Attempt to do a rndis device halt */
|
|
request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG,
|
|
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:
|
|
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) {
|
|
/*
|
|
* TODO: If rndis init failed, we will need to shut down the
|
|
* channel
|
|
*/
|
|
}
|
|
|
|
/* Get the mac address */
|
|
ret = rndis_filter_query_device_mac(rndis_device);
|
|
if (ret != 0) {
|
|
/*
|
|
* TODO: shutdown rndis device and the channel
|
|
*/
|
|
}
|
|
|
|
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 *netDevice = hv_get_drvdata(dev);
|
|
|
|
if (!netDevice)
|
|
return -EINVAL;
|
|
|
|
return rndis_filter_close_device(netDevice->extension);
|
|
}
|
|
|
|
int rndis_filter_send(struct hv_device *dev,
|
|
struct hv_netvsc_packet *pkt)
|
|
{
|
|
int ret;
|
|
struct rndis_filter_packet *filterPacket;
|
|
struct rndis_message *rndisMessage;
|
|
struct rndis_packet *rndisPacket;
|
|
u32 rndisMessageSize;
|
|
|
|
/* Add the rndis header */
|
|
filterPacket = (struct rndis_filter_packet *)pkt->extension;
|
|
|
|
memset(filterPacket, 0, sizeof(struct rndis_filter_packet));
|
|
|
|
rndisMessage = &filterPacket->msg;
|
|
rndisMessageSize = RNDIS_MESSAGE_SIZE(struct rndis_packet);
|
|
|
|
rndisMessage->ndis_msg_type = REMOTE_NDIS_PACKET_MSG;
|
|
rndisMessage->msg_len = pkt->total_data_buflen +
|
|
rndisMessageSize;
|
|
|
|
rndisPacket = &rndisMessage->msg.pkt;
|
|
rndisPacket->data_offset = sizeof(struct rndis_packet);
|
|
rndisPacket->data_len = pkt->total_data_buflen;
|
|
|
|
pkt->is_data_pkt = true;
|
|
pkt->page_buf[0].pfn = virt_to_phys(rndisMessage) >> PAGE_SHIFT;
|
|
pkt->page_buf[0].offset =
|
|
(unsigned long)rndisMessage & (PAGE_SIZE-1);
|
|
pkt->page_buf[0].len = rndisMessageSize;
|
|
|
|
/* Save the packet send completion and context */
|
|
filterPacket->completion = pkt->completion.send.send_completion;
|
|
filterPacket->completion_ctx =
|
|
pkt->completion.send.send_completion_ctx;
|
|
|
|
/* Use ours */
|
|
pkt->completion.send.send_completion = rndis_filter_send_completion;
|
|
pkt->completion.send.send_completion_ctx = filterPacket;
|
|
|
|
ret = netvsc_send(dev, pkt);
|
|
if (ret != 0) {
|
|
/*
|
|
* Reset the completion to originals to allow retries from
|
|
* above
|
|
*/
|
|
pkt->completion.send.send_completion =
|
|
filterPacket->completion;
|
|
pkt->completion.send.send_completion_ctx =
|
|
filterPacket->completion_ctx;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void rndis_filter_send_completion(void *ctx)
|
|
{
|
|
struct rndis_filter_packet *filterPacket = ctx;
|
|
|
|
/* Pass it back to the original handler */
|
|
filterPacket->completion(filterPacket->completion_ctx);
|
|
}
|
|
|
|
|
|
static void rndis_filter_send_request_completion(void *ctx)
|
|
{
|
|
/* Noop */
|
|
}
|