root / hw / virtio-net.c @ 3f4cb3d3
History | View | Annotate | Download (17.4 kB)
1 |
/*
|
---|---|
2 |
* Virtio Network Device
|
3 |
*
|
4 |
* Copyright IBM, Corp. 2007
|
5 |
*
|
6 |
* Authors:
|
7 |
* Anthony Liguori <aliguori@us.ibm.com>
|
8 |
*
|
9 |
* This work is licensed under the terms of the GNU GPL, version 2. See
|
10 |
* the COPYING file in the top-level directory.
|
11 |
*
|
12 |
*/
|
13 |
|
14 |
#include "virtio.h" |
15 |
#include "net.h" |
16 |
#include "qemu-timer.h" |
17 |
#include "virtio-net.h" |
18 |
|
19 |
#define VIRTIO_NET_VM_VERSION 6 |
20 |
|
21 |
#define MAC_TABLE_ENTRIES 32 |
22 |
#define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
23 |
|
24 |
typedef struct VirtIONet |
25 |
{ |
26 |
VirtIODevice vdev; |
27 |
uint8_t mac[ETH_ALEN]; |
28 |
uint16_t status; |
29 |
VirtQueue *rx_vq; |
30 |
VirtQueue *tx_vq; |
31 |
VirtQueue *ctrl_vq; |
32 |
VLANClientState *vc; |
33 |
QEMUTimer *tx_timer; |
34 |
int tx_timer_active;
|
35 |
int mergeable_rx_bufs;
|
36 |
int promisc;
|
37 |
int allmulti;
|
38 |
struct {
|
39 |
int in_use;
|
40 |
uint8_t *macs; |
41 |
} mac_table; |
42 |
uint32_t *vlans; |
43 |
} VirtIONet; |
44 |
|
45 |
/* TODO
|
46 |
* - we could suppress RX interrupt if we were so inclined.
|
47 |
*/
|
48 |
|
49 |
static VirtIONet *to_virtio_net(VirtIODevice *vdev)
|
50 |
{ |
51 |
return (VirtIONet *)vdev;
|
52 |
} |
53 |
|
54 |
static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
55 |
{ |
56 |
VirtIONet *n = to_virtio_net(vdev); |
57 |
struct virtio_net_config netcfg;
|
58 |
|
59 |
netcfg.status = n->status; |
60 |
memcpy(netcfg.mac, n->mac, ETH_ALEN); |
61 |
memcpy(config, &netcfg, sizeof(netcfg));
|
62 |
} |
63 |
|
64 |
static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
65 |
{ |
66 |
VirtIONet *n = to_virtio_net(vdev); |
67 |
struct virtio_net_config netcfg;
|
68 |
|
69 |
memcpy(&netcfg, config, sizeof(netcfg));
|
70 |
|
71 |
if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
|
72 |
memcpy(n->mac, netcfg.mac, ETH_ALEN); |
73 |
qemu_format_nic_info_str(n->vc, n->mac); |
74 |
} |
75 |
} |
76 |
|
77 |
static void virtio_net_set_link_status(VLANClientState *vc) |
78 |
{ |
79 |
VirtIONet *n = vc->opaque; |
80 |
uint16_t old_status = n->status; |
81 |
|
82 |
if (vc->link_down)
|
83 |
n->status &= ~VIRTIO_NET_S_LINK_UP; |
84 |
else
|
85 |
n->status |= VIRTIO_NET_S_LINK_UP; |
86 |
|
87 |
if (n->status != old_status)
|
88 |
virtio_notify_config(&n->vdev); |
89 |
} |
90 |
|
91 |
static void virtio_net_reset(VirtIODevice *vdev) |
92 |
{ |
93 |
VirtIONet *n = to_virtio_net(vdev); |
94 |
|
95 |
/* Reset back to compatibility mode */
|
96 |
n->promisc = 1;
|
97 |
n->allmulti = 0;
|
98 |
|
99 |
/* Flush any MAC and VLAN filter table state */
|
100 |
n->mac_table.in_use = 0;
|
101 |
memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
102 |
memset(n->vlans, 0, MAX_VLAN >> 3); |
103 |
} |
104 |
|
105 |
static uint32_t virtio_net_get_features(VirtIODevice *vdev)
|
106 |
{ |
107 |
uint32_t features = (1 << VIRTIO_NET_F_MAC) |
|
108 |
(1 << VIRTIO_NET_F_STATUS) |
|
109 |
(1 << VIRTIO_NET_F_CTRL_VQ) |
|
110 |
(1 << VIRTIO_NET_F_CTRL_RX) |
|
111 |
(1 << VIRTIO_NET_F_CTRL_VLAN);
|
112 |
|
113 |
return features;
|
114 |
} |
115 |
|
116 |
static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
|
117 |
{ |
118 |
uint32_t features = 0;
|
119 |
|
120 |
/* Linux kernel 2.6.25. It understood MAC (as everyone must),
|
121 |
* but also these: */
|
122 |
features |= (1 << VIRTIO_NET_F_MAC);
|
123 |
features |= (1 << VIRTIO_NET_F_GUEST_CSUM);
|
124 |
features |= (1 << VIRTIO_NET_F_GUEST_TSO4);
|
125 |
features |= (1 << VIRTIO_NET_F_GUEST_TSO6);
|
126 |
features |= (1 << VIRTIO_NET_F_GUEST_ECN);
|
127 |
|
128 |
return features & virtio_net_get_features(vdev);
|
129 |
} |
130 |
|
131 |
static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
132 |
{ |
133 |
VirtIONet *n = to_virtio_net(vdev); |
134 |
|
135 |
n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
|
136 |
} |
137 |
|
138 |
static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
139 |
VirtQueueElement *elem) |
140 |
{ |
141 |
uint8_t on; |
142 |
|
143 |
if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { |
144 |
fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
|
145 |
exit(1);
|
146 |
} |
147 |
|
148 |
on = ldub_p(elem->out_sg[1].iov_base);
|
149 |
|
150 |
if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
|
151 |
n->promisc = on; |
152 |
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) |
153 |
n->allmulti = on; |
154 |
else
|
155 |
return VIRTIO_NET_ERR;
|
156 |
|
157 |
return VIRTIO_NET_OK;
|
158 |
} |
159 |
|
160 |
static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
161 |
VirtQueueElement *elem) |
162 |
{ |
163 |
struct virtio_net_ctrl_mac mac_data;
|
164 |
|
165 |
if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || |
166 |
elem->out_sg[1].iov_len < sizeof(mac_data) || |
167 |
elem->out_sg[2].iov_len < sizeof(mac_data)) |
168 |
return VIRTIO_NET_ERR;
|
169 |
|
170 |
n->mac_table.in_use = 0;
|
171 |
memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
172 |
|
173 |
mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base);
|
174 |
|
175 |
if (sizeof(mac_data.entries) + |
176 |
(mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
|
177 |
return VIRTIO_NET_ERR;
|
178 |
|
179 |
if (mac_data.entries <= MAC_TABLE_ENTRIES) {
|
180 |
memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), |
181 |
mac_data.entries * ETH_ALEN); |
182 |
n->mac_table.in_use += mac_data.entries; |
183 |
} else {
|
184 |
n->promisc = 1;
|
185 |
return VIRTIO_NET_OK;
|
186 |
} |
187 |
|
188 |
mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base);
|
189 |
|
190 |
if (sizeof(mac_data.entries) + |
191 |
(mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
|
192 |
return VIRTIO_NET_ERR;
|
193 |
|
194 |
if (mac_data.entries) {
|
195 |
if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
|
196 |
memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), |
197 |
elem->out_sg[2].iov_base + sizeof(mac_data), |
198 |
mac_data.entries * ETH_ALEN); |
199 |
n->mac_table.in_use += mac_data.entries; |
200 |
} else
|
201 |
n->allmulti = 1;
|
202 |
} |
203 |
|
204 |
return VIRTIO_NET_OK;
|
205 |
} |
206 |
|
207 |
static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
208 |
VirtQueueElement *elem) |
209 |
{ |
210 |
uint16_t vid; |
211 |
|
212 |
if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { |
213 |
fprintf(stderr, "virtio-net ctrl invalid vlan command\n");
|
214 |
return VIRTIO_NET_ERR;
|
215 |
} |
216 |
|
217 |
vid = lduw_le_p(elem->out_sg[1].iov_base);
|
218 |
|
219 |
if (vid >= MAX_VLAN)
|
220 |
return VIRTIO_NET_ERR;
|
221 |
|
222 |
if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
223 |
n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
224 |
else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
225 |
n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
226 |
else
|
227 |
return VIRTIO_NET_ERR;
|
228 |
|
229 |
return VIRTIO_NET_OK;
|
230 |
} |
231 |
|
232 |
static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
233 |
{ |
234 |
VirtIONet *n = to_virtio_net(vdev); |
235 |
struct virtio_net_ctrl_hdr ctrl;
|
236 |
virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
237 |
VirtQueueElement elem; |
238 |
|
239 |
while (virtqueue_pop(vq, &elem)) {
|
240 |
if ((elem.in_num < 1) || (elem.out_num < 1)) { |
241 |
fprintf(stderr, "virtio-net ctrl missing headers\n");
|
242 |
exit(1);
|
243 |
} |
244 |
|
245 |
if (elem.out_sg[0].iov_len < sizeof(ctrl) || |
246 |
elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
247 |
fprintf(stderr, "virtio-net ctrl header not in correct element\n");
|
248 |
exit(1);
|
249 |
} |
250 |
|
251 |
ctrl.class = ldub_p(elem.out_sg[0].iov_base);
|
252 |
ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); |
253 |
|
254 |
if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
|
255 |
status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); |
256 |
else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
257 |
status = virtio_net_handle_mac(n, ctrl.cmd, &elem); |
258 |
else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
259 |
status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); |
260 |
|
261 |
stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
|
262 |
|
263 |
virtqueue_push(vq, &elem, sizeof(status));
|
264 |
virtio_notify(vdev, vq); |
265 |
} |
266 |
} |
267 |
|
268 |
/* RX */
|
269 |
|
270 |
static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
271 |
{ |
272 |
} |
273 |
|
274 |
static int do_virtio_net_can_receive(VirtIONet *n, int bufsize) |
275 |
{ |
276 |
if (!virtio_queue_ready(n->rx_vq) ||
|
277 |
!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
278 |
return 0; |
279 |
|
280 |
if (virtio_queue_empty(n->rx_vq) ||
|
281 |
(n->mergeable_rx_bufs && |
282 |
!virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
|
283 |
virtio_queue_set_notification(n->rx_vq, 1);
|
284 |
return 0; |
285 |
} |
286 |
|
287 |
virtio_queue_set_notification(n->rx_vq, 0);
|
288 |
return 1; |
289 |
} |
290 |
|
291 |
static int virtio_net_can_receive(void *opaque) |
292 |
{ |
293 |
VirtIONet *n = opaque; |
294 |
|
295 |
return do_virtio_net_can_receive(n, VIRTIO_NET_MAX_BUFSIZE);
|
296 |
} |
297 |
|
298 |
static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count) |
299 |
{ |
300 |
int offset, i;
|
301 |
|
302 |
offset = i = 0;
|
303 |
while (offset < count && i < iovcnt) {
|
304 |
int len = MIN(iov[i].iov_len, count - offset);
|
305 |
memcpy(iov[i].iov_base, buf + offset, len); |
306 |
offset += len; |
307 |
i++; |
308 |
} |
309 |
|
310 |
return offset;
|
311 |
} |
312 |
|
313 |
static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
314 |
const void *buf, size_t size, size_t hdr_len) |
315 |
{ |
316 |
struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
317 |
int offset = 0; |
318 |
|
319 |
hdr->flags = 0;
|
320 |
hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
321 |
|
322 |
/* We only ever receive a struct virtio_net_hdr from the tapfd,
|
323 |
* but we may be passing along a larger header to the guest.
|
324 |
*/
|
325 |
iov[0].iov_base += hdr_len;
|
326 |
iov[0].iov_len -= hdr_len;
|
327 |
|
328 |
return offset;
|
329 |
} |
330 |
|
331 |
static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
332 |
{ |
333 |
static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
334 |
static const uint8_t vlan[] = {0x81, 0x00}; |
335 |
uint8_t *ptr = (uint8_t *)buf; |
336 |
int i;
|
337 |
|
338 |
if (n->promisc)
|
339 |
return 1; |
340 |
|
341 |
#ifdef TAP_VNET_HDR
|
342 |
if (tap_has_vnet_hdr(n->vc->vlan->first_client))
|
343 |
ptr += sizeof(struct virtio_net_hdr); |
344 |
#endif
|
345 |
|
346 |
if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
347 |
int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
348 |
if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
349 |
return 0; |
350 |
} |
351 |
|
352 |
if ((ptr[0] & 1) && n->allmulti) |
353 |
return 1; |
354 |
|
355 |
if (!memcmp(ptr, bcast, sizeof(bcast))) |
356 |
return 1; |
357 |
|
358 |
if (!memcmp(ptr, n->mac, ETH_ALEN))
|
359 |
return 1; |
360 |
|
361 |
for (i = 0; i < n->mac_table.in_use; i++) { |
362 |
if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN))
|
363 |
return 1; |
364 |
} |
365 |
|
366 |
return 0; |
367 |
} |
368 |
|
369 |
static void virtio_net_receive(void *opaque, const uint8_t *buf, int size) |
370 |
{ |
371 |
VirtIONet *n = opaque; |
372 |
struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
373 |
size_t hdr_len, offset, i; |
374 |
|
375 |
if (!do_virtio_net_can_receive(n, size))
|
376 |
return;
|
377 |
|
378 |
if (!receive_filter(n, buf, size))
|
379 |
return;
|
380 |
|
381 |
/* hdr_len refers to the header we supply to the guest */
|
382 |
hdr_len = n->mergeable_rx_bufs ? |
383 |
sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
384 |
|
385 |
offset = i = 0;
|
386 |
|
387 |
while (offset < size) {
|
388 |
VirtQueueElement elem; |
389 |
int len, total;
|
390 |
struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
391 |
|
392 |
len = total = 0;
|
393 |
|
394 |
if ((i != 0 && !n->mergeable_rx_bufs) || |
395 |
virtqueue_pop(n->rx_vq, &elem) == 0) {
|
396 |
if (i == 0) |
397 |
return;
|
398 |
fprintf(stderr, "virtio-net truncating packet\n");
|
399 |
exit(1);
|
400 |
} |
401 |
|
402 |
if (elem.in_num < 1) { |
403 |
fprintf(stderr, "virtio-net receive queue contains no in buffers\n");
|
404 |
exit(1);
|
405 |
} |
406 |
|
407 |
if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { |
408 |
fprintf(stderr, "virtio-net header not in first element\n");
|
409 |
exit(1);
|
410 |
} |
411 |
|
412 |
memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
413 |
|
414 |
if (i == 0) { |
415 |
if (n->mergeable_rx_bufs)
|
416 |
mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
417 |
|
418 |
offset += receive_header(n, sg, elem.in_num, |
419 |
buf + offset, size - offset, hdr_len); |
420 |
total += hdr_len; |
421 |
} |
422 |
|
423 |
/* copy in packet. ugh */
|
424 |
len = iov_fill(sg, elem.in_num, |
425 |
buf + offset, size - offset); |
426 |
total += len; |
427 |
|
428 |
/* signal other side */
|
429 |
virtqueue_fill(n->rx_vq, &elem, total, i++); |
430 |
|
431 |
offset += len; |
432 |
} |
433 |
|
434 |
if (mhdr)
|
435 |
mhdr->num_buffers = i; |
436 |
|
437 |
virtqueue_flush(n->rx_vq, i); |
438 |
virtio_notify(&n->vdev, n->rx_vq); |
439 |
} |
440 |
|
441 |
/* TX */
|
442 |
static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
443 |
{ |
444 |
VirtQueueElement elem; |
445 |
int has_vnet_hdr = 0; |
446 |
|
447 |
if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
448 |
return;
|
449 |
|
450 |
while (virtqueue_pop(vq, &elem)) {
|
451 |
ssize_t len = 0;
|
452 |
unsigned int out_num = elem.out_num; |
453 |
struct iovec *out_sg = &elem.out_sg[0]; |
454 |
unsigned hdr_len;
|
455 |
|
456 |
/* hdr_len refers to the header received from the guest */
|
457 |
hdr_len = n->mergeable_rx_bufs ? |
458 |
sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
459 |
sizeof(struct virtio_net_hdr); |
460 |
|
461 |
if (out_num < 1 || out_sg->iov_len != hdr_len) { |
462 |
fprintf(stderr, "virtio-net header not in first element\n");
|
463 |
exit(1);
|
464 |
} |
465 |
|
466 |
/* ignore the header if GSO is not supported */
|
467 |
if (!has_vnet_hdr) {
|
468 |
out_num--; |
469 |
out_sg++; |
470 |
len += hdr_len; |
471 |
} else if (n->mergeable_rx_bufs) { |
472 |
/* tapfd expects a struct virtio_net_hdr */
|
473 |
hdr_len -= sizeof(struct virtio_net_hdr); |
474 |
out_sg->iov_len -= hdr_len; |
475 |
len += hdr_len; |
476 |
} |
477 |
|
478 |
len += qemu_sendv_packet(n->vc, out_sg, out_num); |
479 |
|
480 |
virtqueue_push(vq, &elem, len); |
481 |
virtio_notify(&n->vdev, vq); |
482 |
} |
483 |
} |
484 |
|
485 |
static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) |
486 |
{ |
487 |
VirtIONet *n = to_virtio_net(vdev); |
488 |
|
489 |
if (n->tx_timer_active) {
|
490 |
virtio_queue_set_notification(vq, 1);
|
491 |
qemu_del_timer(n->tx_timer); |
492 |
n->tx_timer_active = 0;
|
493 |
virtio_net_flush_tx(n, vq); |
494 |
} else {
|
495 |
qemu_mod_timer(n->tx_timer, |
496 |
qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
497 |
n->tx_timer_active = 1;
|
498 |
virtio_queue_set_notification(vq, 0);
|
499 |
} |
500 |
} |
501 |
|
502 |
static void virtio_net_tx_timer(void *opaque) |
503 |
{ |
504 |
VirtIONet *n = opaque; |
505 |
|
506 |
n->tx_timer_active = 0;
|
507 |
|
508 |
/* Just in case the driver is not ready on more */
|
509 |
if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
510 |
return;
|
511 |
|
512 |
virtio_queue_set_notification(n->tx_vq, 1);
|
513 |
virtio_net_flush_tx(n, n->tx_vq); |
514 |
} |
515 |
|
516 |
static void virtio_net_save(QEMUFile *f, void *opaque) |
517 |
{ |
518 |
VirtIONet *n = opaque; |
519 |
|
520 |
virtio_save(&n->vdev, f); |
521 |
|
522 |
qemu_put_buffer(f, n->mac, ETH_ALEN); |
523 |
qemu_put_be32(f, n->tx_timer_active); |
524 |
qemu_put_be32(f, n->mergeable_rx_bufs); |
525 |
qemu_put_be16(f, n->status); |
526 |
qemu_put_be32(f, n->promisc); |
527 |
qemu_put_be32(f, n->allmulti); |
528 |
qemu_put_be32(f, n->mac_table.in_use); |
529 |
qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
530 |
qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
531 |
} |
532 |
|
533 |
static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
534 |
{ |
535 |
VirtIONet *n = opaque; |
536 |
|
537 |
if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
538 |
return -EINVAL;
|
539 |
|
540 |
virtio_load(&n->vdev, f); |
541 |
|
542 |
qemu_get_buffer(f, n->mac, ETH_ALEN); |
543 |
n->tx_timer_active = qemu_get_be32(f); |
544 |
n->mergeable_rx_bufs = qemu_get_be32(f); |
545 |
|
546 |
if (version_id >= 3) |
547 |
n->status = qemu_get_be16(f); |
548 |
|
549 |
if (version_id >= 4) { |
550 |
n->promisc = qemu_get_be32(f); |
551 |
n->allmulti = qemu_get_be32(f); |
552 |
} |
553 |
|
554 |
if (version_id >= 5) { |
555 |
n->mac_table.in_use = qemu_get_be32(f); |
556 |
/* MAC_TABLE_ENTRIES may be different from the saved image */
|
557 |
if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
558 |
qemu_get_buffer(f, n->mac_table.macs, |
559 |
n->mac_table.in_use * ETH_ALEN); |
560 |
} else if (n->mac_table.in_use) { |
561 |
qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); |
562 |
n->promisc = 1;
|
563 |
n->mac_table.in_use = 0;
|
564 |
} |
565 |
} |
566 |
|
567 |
if (version_id >= 6) |
568 |
qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
569 |
|
570 |
if (n->tx_timer_active) {
|
571 |
qemu_mod_timer(n->tx_timer, |
572 |
qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
573 |
} |
574 |
|
575 |
return 0; |
576 |
} |
577 |
|
578 |
PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn)
|
579 |
{ |
580 |
VirtIONet *n; |
581 |
static int virtio_net_id; |
582 |
|
583 |
n = (VirtIONet *)virtio_init_pci(bus, "virtio-net",
|
584 |
PCI_VENDOR_ID_REDHAT_QUMRANET, |
585 |
PCI_DEVICE_ID_VIRTIO_NET, |
586 |
PCI_VENDOR_ID_REDHAT_QUMRANET, |
587 |
VIRTIO_ID_NET, |
588 |
PCI_CLASS_NETWORK_ETHERNET, 0x00,
|
589 |
sizeof(struct virtio_net_config), |
590 |
sizeof(VirtIONet));
|
591 |
if (!n)
|
592 |
return NULL; |
593 |
|
594 |
n->vdev.get_config = virtio_net_get_config; |
595 |
n->vdev.set_config = virtio_net_set_config; |
596 |
n->vdev.get_features = virtio_net_get_features; |
597 |
n->vdev.set_features = virtio_net_set_features; |
598 |
n->vdev.bad_features = virtio_net_bad_features; |
599 |
n->vdev.reset = virtio_net_reset; |
600 |
n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
|
601 |
n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
|
602 |
n->ctrl_vq = virtio_add_queue(&n->vdev, 16, virtio_net_handle_ctrl);
|
603 |
memcpy(n->mac, nd->macaddr, ETH_ALEN); |
604 |
n->status = VIRTIO_NET_S_LINK_UP; |
605 |
n->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name, |
606 |
virtio_net_receive, virtio_net_can_receive, n); |
607 |
n->vc->link_status_changed = virtio_net_set_link_status; |
608 |
|
609 |
qemu_format_nic_info_str(n->vc, n->mac); |
610 |
|
611 |
n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
612 |
n->tx_timer_active = 0;
|
613 |
n->mergeable_rx_bufs = 0;
|
614 |
n->promisc = 1; /* for compatibility */ |
615 |
|
616 |
n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
617 |
|
618 |
n->vlans = qemu_mallocz(MAX_VLAN >> 3);
|
619 |
|
620 |
register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
|
621 |
virtio_net_save, virtio_net_load, n); |
622 |
return (PCIDevice *)n;
|
623 |
} |