Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


changed device registration interface
[palacios.git] / palacios / src / devices / vnet_nic.c
1 /* 
2  * This file is part of the Palacios Virtual Machine Monitor developed
3  * by the V3VEE Project with funding from the United States National 
4  * Science Foundation and the Department of Energy.  
5  *
6  * The V3VEE Project is a joint project between Northwestern University
7  * and the University of New Mexico.  You can find out more at 
8  * http://www.v3vee.org
9  *
10  * Copyright (c) 2010, Lei Xia <lxia@northwestern.edu>
11  * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org> 
12  * All rights reserved.
13  *
14  * Author: Lei Xia <lxia@northwestern.edu>
15  *               
16  *
17  * This is free software.  You are permitted to use,
18  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
19  */
20 //backend device for Virtio NIC
21
22 #include <palacios/vmm_vnet.h>
23 #include <palacios/vmm.h>
24 #include <palacios/vmm_dev_mgr.h>
25 #include <devices/lnx_virtio_pci.h>
26 #include <palacios/vm_guest_mem.h>
27 #include <devices/pci.h>
28 #include <palacios/vmm_sprintf.h>
29
30 #ifndef CONFIG_DEBUG_VNET_NIC
31 #undef PrintDebug
32 #define PrintDebug(fmt, args...)
33 #endif
34
35
36 struct vnet_nic_state {
37     char mac[6];
38     struct v3_vm_info * vm;
39     struct v3_dev_net_ops net_ops;
40     int vnet_dev_id;
41 };
42
43 /* called by frontend device, 
44   * tell the VNET can start sending pkt to it */
45 static void start_rx(void * private_data){
46     //struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
47
48     //v3_vnet_enable_device(vnetnic->vnet_dev_id);
49 }
50
51 /* called by frontend device, 
52   * tell the VNET stop sending pkt to it */
53 static void stop_rx(void * private_data){
54     //struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
55
56     //v3_vnet_disable_device(vnetnic->vnet_dev_id);
57 }
58
59 /* called by frontend, send pkt to VNET */
60 static int vnet_nic_send(uint8_t * buf, uint32_t len, 
61                          void * private_data) {
62     struct vnet_nic_state * vnetnic = (struct vnet_nic_state *)private_data;
63
64     struct v3_vnet_pkt pkt;
65     pkt.size = len;
66     pkt.src_type = LINK_INTERFACE;
67     pkt.src_id = vnetnic->vnet_dev_id;
68     memcpy(pkt.header, buf, ETHERNET_HEADER_LEN);
69     pkt.data = buf;
70
71 #ifdef CONFIG_DEBUG_VNET_NIC
72     {
73         PrintDebug("Virtio VNET-NIC: send pkt size: %d, pkt src_id: %d\n", 
74                         len,  vnetnic->vnet_dev_id);
75         v3_hexdump(buf, len, NULL, 0);
76     }
77 #endif
78
79     return v3_vnet_send_pkt(&pkt, NULL);;
80 }
81
82
83 /* send pkt to frontend device */
84 static int virtio_input(struct v3_vm_info * info, 
85                         struct v3_vnet_pkt * pkt, 
86                         void * private_data){
87     struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
88         
89     return vnetnic->net_ops.recv(pkt->data, 
90                                                         pkt->size, 
91                                                         vnetnic->net_ops.frontend_data);
92 }
93
94 /* tell frontend device to poll data from guest */
95 static void virtio_poll(struct v3_vm_info * info, 
96                         void * private_data){
97     struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
98
99     vnetnic->net_ops.poll(info, vnetnic->net_ops.frontend_data);
100 }
101
102
103 /* tell the frontend to start sending pkt to VNET*/
104 static void start_tx(void * private_data){
105     struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
106
107     vnetnic->net_ops.start_tx(vnetnic->net_ops.frontend_data);
108 }
109
110 /* tell the frontend device to stop sending pkt to VNET*/
111 static void stop_tx(void * private_data){
112     struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
113
114     vnetnic->net_ops.stop_tx(vnetnic->net_ops.frontend_data);
115 }
116
117
118 static int vnet_nic_free(struct vm_device * dev) {
119     return 0;
120 }
121
122 static struct v3_device_ops dev_ops = {
123     .free = vnet_nic_free,
124
125 };
126
127 static struct v3_vnet_dev_ops vnet_dev_ops = {
128     .input = virtio_input,
129     .poll = virtio_poll,
130     .start_tx = start_tx,
131     .stop_tx = stop_tx,
132 };
133
134
135 static int register_to_vnet(struct v3_vm_info * vm,
136                             struct vnet_nic_state * vnet_nic,
137                             char * dev_name, uchar_t mac[6]) { 
138    
139     PrintDebug("Vnet-nic: register Vnet-nic device %s, state %p to VNET\n", dev_name, vnet_nic);
140         
141     return v3_vnet_add_dev(vm, mac, &vnet_dev_ops, (void *)vnet_nic);
142 }
143
144
145 static int str2mac(char * macstr, char mac[6]){
146     char hex[2], *s = macstr;
147     int i = 0;
148
149     while(s){
150         memcpy(hex, s, 2);
151         mac[i++] = (char)atox(hex);
152         if (i == 6) return 0;
153         s=strchr(s, ':');
154         if(s) s++;
155     }
156
157     return -1;
158 }
159
160 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
161     struct vnet_nic_state * vnetnic = NULL;
162     char * dev_id = v3_cfg_val(cfg, "ID");
163     char * macstr = NULL;
164     char mac[6];
165     int vnet_dev_id;
166
167     v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
168     macstr = v3_cfg_val(frontend_cfg, "mac");
169
170     if (macstr == NULL) {
171         PrintDebug("Vnet-nic: No Mac specified\n");
172     } else {
173         str2mac(macstr, mac);
174     }
175
176     vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
177     memset(vnetnic, 0, sizeof(struct vnet_nic_state));
178
179     struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, vnetnic);
180
181     if (dev == NULL) {
182         PrintError("Could not attach device %s\n", dev_id);
183         V3_Free(vnetnic);
184         return -1;
185     }
186
187     vnetnic->net_ops.send = vnet_nic_send;
188     vnetnic->net_ops.start_rx = start_rx;
189     vnetnic->net_ops.stop_rx = stop_rx;
190     memcpy(vnetnic->mac, mac, 6);
191     vnetnic->vm = vm;
192         
193     if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"), 
194                            &(vnetnic->net_ops), frontend_cfg, vnetnic) == -1) {
195         PrintError("Could not connect %s to frontend %s\n", 
196                    dev_id, v3_cfg_val(frontend_cfg, "tag"));
197         v3_remove_device(vnetnic);
198         return -1;
199     }
200
201     PrintDebug("Vnet-nic: Connect %s to frontend %s\n", 
202               dev_id, v3_cfg_val(frontend_cfg, "tag"));
203
204     if ((vnet_dev_id = register_to_vnet(vm, vnetnic, dev_id, vnetnic->mac)) == -1) {
205         PrintError("Vnet-nic device %s (mac: %s) fails to registered to VNET\n", dev_id, macstr);
206         v3_remove_device(vnetnic);
207         return 0;
208     }
209
210     vnetnic->vnet_dev_id = vnet_dev_id;
211
212     PrintDebug("Vnet-nic device %s (mac: %s, %ld) registered to VNET\n", 
213                 dev_id, macstr, *((ulong_t *)vnetnic->mac));
214
215
216 //for temporary hack for vnet bridge test
217 #if 0
218     {
219         uchar_t zeromac[6] = {0,0,0,0,0,0};
220                 
221         if(!strcmp(dev_id, "vnet_nic")){
222             struct v3_vnet_route route;
223                 
224             route.dst_id = vnet_dev_id;
225             route.dst_type = LINK_INTERFACE;
226             route.src_id = 0;
227             route.src_type = LINK_EDGE;
228             memcpy(route.dst_mac, zeromac, 6);
229             route.dst_mac_qual = MAC_ANY;
230             memcpy(route.src_mac, zeromac, 6);
231             route.src_mac_qual = MAC_ANY;  
232             v3_vnet_add_route(route);
233
234
235             route.dst_id = 0;
236             route.dst_type = LINK_EDGE;
237             route.src_id = vnet_dev_id;
238             route.src_type = LINK_INTERFACE;
239             memcpy(route.dst_mac, zeromac, 6);
240             route.dst_mac_qual = MAC_ANY;
241             memcpy(route.src_mac, zeromac, 6);
242             route.src_mac_qual = MAC_ANY;
243
244             v3_vnet_add_route(route);
245         }
246     }
247 #endif
248
249 //for temporary hack for Linux bridge (w/o encapuslation) test
250 #if 1
251     {
252         static int vnet_nic_guestid = -1;
253         static int vnet_nic_dom0 = -1;
254         uchar_t zeromac[6] = {0,0,0,0,0,0};
255                 
256         if(!strcmp(dev_id, "vnet_nic")){ //domu
257             vnet_nic_guestid = vnet_dev_id;
258         }
259         if (!strcmp(dev_id, "vnet_nic_dom0")){
260             vnet_nic_dom0 = vnet_dev_id;
261         }
262
263         if(vnet_nic_guestid != -1 && vnet_nic_dom0 !=-1){
264             struct v3_vnet_route route;
265                 
266             route.src_id = vnet_nic_guestid;
267             route.src_type = LINK_INTERFACE;
268             route.dst_id = vnet_nic_dom0;
269             route.dst_type = LINK_INTERFACE;
270             memcpy(route.dst_mac, zeromac, 6);
271             route.dst_mac_qual = MAC_ANY;
272             memcpy(route.src_mac, zeromac, 6);
273             route.src_mac_qual = MAC_ANY;  
274             v3_vnet_add_route(route);
275
276
277             route.src_id = vnet_nic_dom0;
278             route.src_type = LINK_INTERFACE;
279             route.dst_id = vnet_nic_guestid;
280             route.dst_type = LINK_INTERFACE;
281             memcpy(route.dst_mac, zeromac, 6);
282             route.dst_mac_qual = MAC_ANY;
283             memcpy(route.src_mac, zeromac, 6);
284             route.src_mac_qual = MAC_ANY;
285
286             v3_vnet_add_route(route);
287         }
288     }
289 #endif
290
291     return 0;
292 }
293
294 device_register("VNET_NIC", vnet_nic_init)