root / hw / virtio-net.c @ 5430a28f
History | View | Annotate | Download (31.2 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 "iov.h" |
15 |
#include "virtio.h" |
16 |
#include "net.h" |
17 |
#include "net/checksum.h" |
18 |
#include "net/tap.h" |
19 |
#include "qemu-error.h" |
20 |
#include "qemu-timer.h" |
21 |
#include "virtio-net.h" |
22 |
#include "vhost_net.h" |
23 |
|
24 |
#define VIRTIO_NET_VM_VERSION 11 |
25 |
|
26 |
#define MAC_TABLE_ENTRIES 64 |
27 |
#define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
28 |
|
29 |
typedef struct VirtIONet |
30 |
{ |
31 |
VirtIODevice vdev; |
32 |
uint8_t mac[ETH_ALEN]; |
33 |
uint16_t status; |
34 |
VirtQueue *rx_vq; |
35 |
VirtQueue *tx_vq; |
36 |
VirtQueue *ctrl_vq; |
37 |
NICState *nic; |
38 |
QEMUTimer *tx_timer; |
39 |
QEMUBH *tx_bh; |
40 |
uint32_t tx_timeout; |
41 |
int32_t tx_burst; |
42 |
int tx_waiting;
|
43 |
uint32_t has_vnet_hdr; |
44 |
uint8_t has_ufo; |
45 |
struct {
|
46 |
VirtQueueElement elem; |
47 |
ssize_t len; |
48 |
} async_tx; |
49 |
int mergeable_rx_bufs;
|
50 |
uint8_t promisc; |
51 |
uint8_t allmulti; |
52 |
uint8_t alluni; |
53 |
uint8_t nomulti; |
54 |
uint8_t nouni; |
55 |
uint8_t nobcast; |
56 |
uint8_t vhost_started; |
57 |
struct {
|
58 |
int in_use;
|
59 |
int first_multi;
|
60 |
uint8_t multi_overflow; |
61 |
uint8_t uni_overflow; |
62 |
uint8_t *macs; |
63 |
} mac_table; |
64 |
uint32_t *vlans; |
65 |
DeviceState *qdev; |
66 |
} VirtIONet; |
67 |
|
68 |
/* TODO
|
69 |
* - we could suppress RX interrupt if we were so inclined.
|
70 |
*/
|
71 |
|
72 |
static VirtIONet *to_virtio_net(VirtIODevice *vdev)
|
73 |
{ |
74 |
return (VirtIONet *)vdev;
|
75 |
} |
76 |
|
77 |
static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
78 |
{ |
79 |
VirtIONet *n = to_virtio_net(vdev); |
80 |
struct virtio_net_config netcfg;
|
81 |
|
82 |
netcfg.status = lduw_p(&n->status); |
83 |
memcpy(netcfg.mac, n->mac, ETH_ALEN); |
84 |
memcpy(config, &netcfg, sizeof(netcfg));
|
85 |
} |
86 |
|
87 |
static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
88 |
{ |
89 |
VirtIONet *n = to_virtio_net(vdev); |
90 |
struct virtio_net_config netcfg;
|
91 |
|
92 |
memcpy(&netcfg, config, sizeof(netcfg));
|
93 |
|
94 |
if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
|
95 |
memcpy(n->mac, netcfg.mac, ETH_ALEN); |
96 |
qemu_format_nic_info_str(&n->nic->nc, n->mac); |
97 |
} |
98 |
} |
99 |
|
100 |
static bool virtio_net_started(VirtIONet *n, uint8_t status) |
101 |
{ |
102 |
return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
103 |
(n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
104 |
} |
105 |
|
106 |
static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
107 |
{ |
108 |
if (!n->nic->nc.peer) {
|
109 |
return;
|
110 |
} |
111 |
if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) {
|
112 |
return;
|
113 |
} |
114 |
|
115 |
if (!tap_get_vhost_net(n->nic->nc.peer)) {
|
116 |
return;
|
117 |
} |
118 |
if (!!n->vhost_started == virtio_net_started(n, status)) {
|
119 |
return;
|
120 |
} |
121 |
if (!n->vhost_started) {
|
122 |
int r;
|
123 |
if (!vhost_net_query(tap_get_vhost_net(n->nic->nc.peer), &n->vdev)) {
|
124 |
return;
|
125 |
} |
126 |
r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); |
127 |
if (r < 0) { |
128 |
error_report("unable to start vhost net: %d: "
|
129 |
"falling back on userspace virtio", -r);
|
130 |
} else {
|
131 |
n->vhost_started = 1;
|
132 |
} |
133 |
} else {
|
134 |
vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); |
135 |
n->vhost_started = 0;
|
136 |
} |
137 |
} |
138 |
|
139 |
static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
140 |
{ |
141 |
VirtIONet *n = to_virtio_net(vdev); |
142 |
|
143 |
virtio_net_vhost_status(n, status); |
144 |
|
145 |
if (!n->tx_waiting) {
|
146 |
return;
|
147 |
} |
148 |
|
149 |
if (virtio_net_started(n, status) && !n->vhost_started) {
|
150 |
if (n->tx_timer) {
|
151 |
qemu_mod_timer(n->tx_timer, |
152 |
qemu_get_clock(vm_clock) + n->tx_timeout); |
153 |
} else {
|
154 |
qemu_bh_schedule(n->tx_bh); |
155 |
} |
156 |
} else {
|
157 |
if (n->tx_timer) {
|
158 |
qemu_del_timer(n->tx_timer); |
159 |
} else {
|
160 |
qemu_bh_cancel(n->tx_bh); |
161 |
} |
162 |
} |
163 |
} |
164 |
|
165 |
static void virtio_net_set_link_status(VLANClientState *nc) |
166 |
{ |
167 |
VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
168 |
uint16_t old_status = n->status; |
169 |
|
170 |
if (nc->link_down)
|
171 |
n->status &= ~VIRTIO_NET_S_LINK_UP; |
172 |
else
|
173 |
n->status |= VIRTIO_NET_S_LINK_UP; |
174 |
|
175 |
if (n->status != old_status)
|
176 |
virtio_notify_config(&n->vdev); |
177 |
|
178 |
virtio_net_set_status(&n->vdev, n->vdev.status); |
179 |
} |
180 |
|
181 |
static void virtio_net_reset(VirtIODevice *vdev) |
182 |
{ |
183 |
VirtIONet *n = to_virtio_net(vdev); |
184 |
|
185 |
/* Reset back to compatibility mode */
|
186 |
n->promisc = 1;
|
187 |
n->allmulti = 0;
|
188 |
n->alluni = 0;
|
189 |
n->nomulti = 0;
|
190 |
n->nouni = 0;
|
191 |
n->nobcast = 0;
|
192 |
|
193 |
/* Flush any MAC and VLAN filter table state */
|
194 |
n->mac_table.in_use = 0;
|
195 |
n->mac_table.first_multi = 0;
|
196 |
n->mac_table.multi_overflow = 0;
|
197 |
n->mac_table.uni_overflow = 0;
|
198 |
memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
199 |
memset(n->vlans, 0, MAX_VLAN >> 3); |
200 |
} |
201 |
|
202 |
static int peer_has_vnet_hdr(VirtIONet *n) |
203 |
{ |
204 |
if (!n->nic->nc.peer)
|
205 |
return 0; |
206 |
|
207 |
if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP)
|
208 |
return 0; |
209 |
|
210 |
n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
211 |
|
212 |
return n->has_vnet_hdr;
|
213 |
} |
214 |
|
215 |
static int peer_has_ufo(VirtIONet *n) |
216 |
{ |
217 |
if (!peer_has_vnet_hdr(n))
|
218 |
return 0; |
219 |
|
220 |
n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
221 |
|
222 |
return n->has_ufo;
|
223 |
} |
224 |
|
225 |
static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
|
226 |
{ |
227 |
VirtIONet *n = to_virtio_net(vdev); |
228 |
|
229 |
features |= (1 << VIRTIO_NET_F_MAC);
|
230 |
|
231 |
if (peer_has_vnet_hdr(n)) {
|
232 |
tap_using_vnet_hdr(n->nic->nc.peer, 1);
|
233 |
} else {
|
234 |
features &= ~(0x1 << VIRTIO_NET_F_CSUM);
|
235 |
features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
|
236 |
features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
|
237 |
features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
|
238 |
|
239 |
features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
|
240 |
features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
|
241 |
features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
|
242 |
features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
|
243 |
} |
244 |
|
245 |
if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
|
246 |
features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
|
247 |
features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
|
248 |
} |
249 |
|
250 |
if (!n->nic->nc.peer ||
|
251 |
n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
252 |
return features;
|
253 |
} |
254 |
if (!tap_get_vhost_net(n->nic->nc.peer)) {
|
255 |
return features;
|
256 |
} |
257 |
return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features);
|
258 |
} |
259 |
|
260 |
static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
|
261 |
{ |
262 |
uint32_t features = 0;
|
263 |
|
264 |
/* Linux kernel 2.6.25. It understood MAC (as everyone must),
|
265 |
* but also these: */
|
266 |
features |= (1 << VIRTIO_NET_F_MAC);
|
267 |
features |= (1 << VIRTIO_NET_F_CSUM);
|
268 |
features |= (1 << VIRTIO_NET_F_HOST_TSO4);
|
269 |
features |= (1 << VIRTIO_NET_F_HOST_TSO6);
|
270 |
features |= (1 << VIRTIO_NET_F_HOST_ECN);
|
271 |
|
272 |
return features;
|
273 |
} |
274 |
|
275 |
static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
276 |
{ |
277 |
VirtIONet *n = to_virtio_net(vdev); |
278 |
|
279 |
n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
|
280 |
|
281 |
if (n->has_vnet_hdr) {
|
282 |
tap_set_offload(n->nic->nc.peer, |
283 |
(features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
284 |
(features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
285 |
(features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
286 |
(features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
287 |
(features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
288 |
} |
289 |
if (!n->nic->nc.peer ||
|
290 |
n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
291 |
return;
|
292 |
} |
293 |
if (!tap_get_vhost_net(n->nic->nc.peer)) {
|
294 |
return;
|
295 |
} |
296 |
vhost_net_ack_features(tap_get_vhost_net(n->nic->nc.peer), features); |
297 |
} |
298 |
|
299 |
static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
300 |
VirtQueueElement *elem) |
301 |
{ |
302 |
uint8_t on; |
303 |
|
304 |
if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { |
305 |
error_report("virtio-net ctrl invalid rx mode command");
|
306 |
exit(1);
|
307 |
} |
308 |
|
309 |
on = ldub_p(elem->out_sg[1].iov_base);
|
310 |
|
311 |
if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
|
312 |
n->promisc = on; |
313 |
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) |
314 |
n->allmulti = on; |
315 |
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
316 |
n->alluni = on; |
317 |
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) |
318 |
n->nomulti = on; |
319 |
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) |
320 |
n->nouni = on; |
321 |
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) |
322 |
n->nobcast = on; |
323 |
else
|
324 |
return VIRTIO_NET_ERR;
|
325 |
|
326 |
return VIRTIO_NET_OK;
|
327 |
} |
328 |
|
329 |
static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
330 |
VirtQueueElement *elem) |
331 |
{ |
332 |
struct virtio_net_ctrl_mac mac_data;
|
333 |
|
334 |
if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || |
335 |
elem->out_sg[1].iov_len < sizeof(mac_data) || |
336 |
elem->out_sg[2].iov_len < sizeof(mac_data)) |
337 |
return VIRTIO_NET_ERR;
|
338 |
|
339 |
n->mac_table.in_use = 0;
|
340 |
n->mac_table.first_multi = 0;
|
341 |
n->mac_table.uni_overflow = 0;
|
342 |
n->mac_table.multi_overflow = 0;
|
343 |
memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
344 |
|
345 |
mac_data.entries = ldl_p(elem->out_sg[1].iov_base);
|
346 |
|
347 |
if (sizeof(mac_data.entries) + |
348 |
(mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
|
349 |
return VIRTIO_NET_ERR;
|
350 |
|
351 |
if (mac_data.entries <= MAC_TABLE_ENTRIES) {
|
352 |
memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), |
353 |
mac_data.entries * ETH_ALEN); |
354 |
n->mac_table.in_use += mac_data.entries; |
355 |
} else {
|
356 |
n->mac_table.uni_overflow = 1;
|
357 |
} |
358 |
|
359 |
n->mac_table.first_multi = n->mac_table.in_use; |
360 |
|
361 |
mac_data.entries = ldl_p(elem->out_sg[2].iov_base);
|
362 |
|
363 |
if (sizeof(mac_data.entries) + |
364 |
(mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
|
365 |
return VIRTIO_NET_ERR;
|
366 |
|
367 |
if (mac_data.entries) {
|
368 |
if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
|
369 |
memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), |
370 |
elem->out_sg[2].iov_base + sizeof(mac_data), |
371 |
mac_data.entries * ETH_ALEN); |
372 |
n->mac_table.in_use += mac_data.entries; |
373 |
} else {
|
374 |
n->mac_table.multi_overflow = 1;
|
375 |
} |
376 |
} |
377 |
|
378 |
return VIRTIO_NET_OK;
|
379 |
} |
380 |
|
381 |
static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
382 |
VirtQueueElement *elem) |
383 |
{ |
384 |
uint16_t vid; |
385 |
|
386 |
if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { |
387 |
error_report("virtio-net ctrl invalid vlan command");
|
388 |
return VIRTIO_NET_ERR;
|
389 |
} |
390 |
|
391 |
vid = lduw_p(elem->out_sg[1].iov_base);
|
392 |
|
393 |
if (vid >= MAX_VLAN)
|
394 |
return VIRTIO_NET_ERR;
|
395 |
|
396 |
if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
397 |
n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
398 |
else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
399 |
n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
400 |
else
|
401 |
return VIRTIO_NET_ERR;
|
402 |
|
403 |
return VIRTIO_NET_OK;
|
404 |
} |
405 |
|
406 |
static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
407 |
{ |
408 |
VirtIONet *n = to_virtio_net(vdev); |
409 |
struct virtio_net_ctrl_hdr ctrl;
|
410 |
virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
411 |
VirtQueueElement elem; |
412 |
|
413 |
while (virtqueue_pop(vq, &elem)) {
|
414 |
if ((elem.in_num < 1) || (elem.out_num < 1)) { |
415 |
error_report("virtio-net ctrl missing headers");
|
416 |
exit(1);
|
417 |
} |
418 |
|
419 |
if (elem.out_sg[0].iov_len < sizeof(ctrl) || |
420 |
elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
421 |
error_report("virtio-net ctrl header not in correct element");
|
422 |
exit(1);
|
423 |
} |
424 |
|
425 |
ctrl.class = ldub_p(elem.out_sg[0].iov_base);
|
426 |
ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); |
427 |
|
428 |
if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
|
429 |
status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); |
430 |
else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
431 |
status = virtio_net_handle_mac(n, ctrl.cmd, &elem); |
432 |
else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
433 |
status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); |
434 |
|
435 |
stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
|
436 |
|
437 |
virtqueue_push(vq, &elem, sizeof(status));
|
438 |
virtio_notify(vdev, vq); |
439 |
} |
440 |
} |
441 |
|
442 |
/* RX */
|
443 |
|
444 |
static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
445 |
{ |
446 |
VirtIONet *n = to_virtio_net(vdev); |
447 |
|
448 |
qemu_flush_queued_packets(&n->nic->nc); |
449 |
|
450 |
/* We now have RX buffers, signal to the IO thread to break out of the
|
451 |
* select to re-poll the tap file descriptor */
|
452 |
qemu_notify_event(); |
453 |
} |
454 |
|
455 |
static int virtio_net_can_receive(VLANClientState *nc) |
456 |
{ |
457 |
VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
458 |
if (!n->vdev.vm_running) {
|
459 |
return 0; |
460 |
} |
461 |
|
462 |
if (!virtio_queue_ready(n->rx_vq) ||
|
463 |
!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
464 |
return 0; |
465 |
|
466 |
return 1; |
467 |
} |
468 |
|
469 |
static int virtio_net_has_buffers(VirtIONet *n, int bufsize) |
470 |
{ |
471 |
if (virtio_queue_empty(n->rx_vq) ||
|
472 |
(n->mergeable_rx_bufs && |
473 |
!virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
|
474 |
virtio_queue_set_notification(n->rx_vq, 1);
|
475 |
|
476 |
/* To avoid a race condition where the guest has made some buffers
|
477 |
* available after the above check but before notification was
|
478 |
* enabled, check for available buffers again.
|
479 |
*/
|
480 |
if (virtio_queue_empty(n->rx_vq) ||
|
481 |
(n->mergeable_rx_bufs && |
482 |
!virtqueue_avail_bytes(n->rx_vq, bufsize, 0)))
|
483 |
return 0; |
484 |
} |
485 |
|
486 |
virtio_queue_set_notification(n->rx_vq, 0);
|
487 |
return 1; |
488 |
} |
489 |
|
490 |
/* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
491 |
* it never finds out that the packets don't have valid checksums. This
|
492 |
* causes dhclient to get upset. Fedora's carried a patch for ages to
|
493 |
* fix this with Xen but it hasn't appeared in an upstream release of
|
494 |
* dhclient yet.
|
495 |
*
|
496 |
* To avoid breaking existing guests, we catch udp packets and add
|
497 |
* checksums. This is terrible but it's better than hacking the guest
|
498 |
* kernels.
|
499 |
*
|
500 |
* N.B. if we introduce a zero-copy API, this operation is no longer free so
|
501 |
* we should provide a mechanism to disable it to avoid polluting the host
|
502 |
* cache.
|
503 |
*/
|
504 |
static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
505 |
const uint8_t *buf, size_t size)
|
506 |
{ |
507 |
if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
508 |
(size > 27 && size < 1500) && /* normal sized MTU */ |
509 |
(buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
510 |
(buf[23] == 17) && /* ip.protocol == UDP */ |
511 |
(buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
512 |
/* FIXME this cast is evil */
|
513 |
net_checksum_calculate((uint8_t *)buf, size); |
514 |
hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
515 |
} |
516 |
} |
517 |
|
518 |
static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
519 |
const void *buf, size_t size, size_t hdr_len) |
520 |
{ |
521 |
struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
522 |
int offset = 0; |
523 |
|
524 |
hdr->flags = 0;
|
525 |
hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
526 |
|
527 |
if (n->has_vnet_hdr) {
|
528 |
memcpy(hdr, buf, sizeof(*hdr));
|
529 |
offset = sizeof(*hdr);
|
530 |
work_around_broken_dhclient(hdr, buf + offset, size - offset); |
531 |
} |
532 |
|
533 |
/* We only ever receive a struct virtio_net_hdr from the tapfd,
|
534 |
* but we may be passing along a larger header to the guest.
|
535 |
*/
|
536 |
iov[0].iov_base += hdr_len;
|
537 |
iov[0].iov_len -= hdr_len;
|
538 |
|
539 |
return offset;
|
540 |
} |
541 |
|
542 |
static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
543 |
{ |
544 |
static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
545 |
static const uint8_t vlan[] = {0x81, 0x00}; |
546 |
uint8_t *ptr = (uint8_t *)buf; |
547 |
int i;
|
548 |
|
549 |
if (n->promisc)
|
550 |
return 1; |
551 |
|
552 |
if (n->has_vnet_hdr) {
|
553 |
ptr += sizeof(struct virtio_net_hdr); |
554 |
} |
555 |
|
556 |
if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
557 |
int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
558 |
if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
559 |
return 0; |
560 |
} |
561 |
|
562 |
if (ptr[0] & 1) { // multicast |
563 |
if (!memcmp(ptr, bcast, sizeof(bcast))) { |
564 |
return !n->nobcast;
|
565 |
} else if (n->nomulti) { |
566 |
return 0; |
567 |
} else if (n->allmulti || n->mac_table.multi_overflow) { |
568 |
return 1; |
569 |
} |
570 |
|
571 |
for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
572 |
if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
573 |
return 1; |
574 |
} |
575 |
} |
576 |
} else { // unicast |
577 |
if (n->nouni) {
|
578 |
return 0; |
579 |
} else if (n->alluni || n->mac_table.uni_overflow) { |
580 |
return 1; |
581 |
} else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
582 |
return 1; |
583 |
} |
584 |
|
585 |
for (i = 0; i < n->mac_table.first_multi; i++) { |
586 |
if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
587 |
return 1; |
588 |
} |
589 |
} |
590 |
} |
591 |
|
592 |
return 0; |
593 |
} |
594 |
|
595 |
static ssize_t virtio_net_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
596 |
{ |
597 |
VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
598 |
struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
599 |
size_t guest_hdr_len, offset, i, host_hdr_len; |
600 |
|
601 |
if (!virtio_net_can_receive(&n->nic->nc))
|
602 |
return -1; |
603 |
|
604 |
/* hdr_len refers to the header we supply to the guest */
|
605 |
guest_hdr_len = n->mergeable_rx_bufs ? |
606 |
sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
607 |
|
608 |
|
609 |
host_hdr_len = n->has_vnet_hdr ? sizeof(struct virtio_net_hdr) : 0; |
610 |
if (!virtio_net_has_buffers(n, size + guest_hdr_len - host_hdr_len))
|
611 |
return 0; |
612 |
|
613 |
if (!receive_filter(n, buf, size))
|
614 |
return size;
|
615 |
|
616 |
offset = i = 0;
|
617 |
|
618 |
while (offset < size) {
|
619 |
VirtQueueElement elem; |
620 |
int len, total;
|
621 |
struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
622 |
|
623 |
total = 0;
|
624 |
|
625 |
if (virtqueue_pop(n->rx_vq, &elem) == 0) { |
626 |
if (i == 0) |
627 |
return -1; |
628 |
error_report("virtio-net unexpected empty queue: "
|
629 |
"i %zd mergeable %d offset %zd, size %zd, "
|
630 |
"guest hdr len %zd, host hdr len %zd guest features 0x%x",
|
631 |
i, n->mergeable_rx_bufs, offset, size, |
632 |
guest_hdr_len, host_hdr_len, n->vdev.guest_features); |
633 |
exit(1);
|
634 |
} |
635 |
|
636 |
if (elem.in_num < 1) { |
637 |
error_report("virtio-net receive queue contains no in buffers");
|
638 |
exit(1);
|
639 |
} |
640 |
|
641 |
if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != guest_hdr_len) { |
642 |
error_report("virtio-net header not in first element");
|
643 |
exit(1);
|
644 |
} |
645 |
|
646 |
memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
647 |
|
648 |
if (i == 0) { |
649 |
if (n->mergeable_rx_bufs)
|
650 |
mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
651 |
|
652 |
offset += receive_header(n, sg, elem.in_num, |
653 |
buf + offset, size - offset, guest_hdr_len); |
654 |
total += guest_hdr_len; |
655 |
} |
656 |
|
657 |
/* copy in packet. ugh */
|
658 |
len = iov_from_buf(sg, elem.in_num, |
659 |
buf + offset, size - offset); |
660 |
total += len; |
661 |
offset += len; |
662 |
/* If buffers can't be merged, at this point we
|
663 |
* must have consumed the complete packet.
|
664 |
* Otherwise, drop it. */
|
665 |
if (!n->mergeable_rx_bufs && offset < size) {
|
666 |
#if 0
|
667 |
error_report("virtio-net truncated non-mergeable packet: "
|
668 |
"i %zd mergeable %d offset %zd, size %zd, "
|
669 |
"guest hdr len %zd, host hdr len %zd",
|
670 |
i, n->mergeable_rx_bufs,
|
671 |
offset, size, guest_hdr_len, host_hdr_len);
|
672 |
#endif
|
673 |
return size;
|
674 |
} |
675 |
|
676 |
/* signal other side */
|
677 |
virtqueue_fill(n->rx_vq, &elem, total, i++); |
678 |
} |
679 |
|
680 |
if (mhdr) {
|
681 |
mhdr->num_buffers = lduw_p(&i); |
682 |
} |
683 |
|
684 |
virtqueue_flush(n->rx_vq, i); |
685 |
virtio_notify(&n->vdev, n->rx_vq); |
686 |
|
687 |
return size;
|
688 |
} |
689 |
|
690 |
static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq);
|
691 |
|
692 |
static void virtio_net_tx_complete(VLANClientState *nc, ssize_t len) |
693 |
{ |
694 |
VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
695 |
|
696 |
virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); |
697 |
virtio_notify(&n->vdev, n->tx_vq); |
698 |
|
699 |
n->async_tx.elem.out_num = n->async_tx.len = 0;
|
700 |
|
701 |
virtio_queue_set_notification(n->tx_vq, 1);
|
702 |
virtio_net_flush_tx(n, n->tx_vq); |
703 |
} |
704 |
|
705 |
/* TX */
|
706 |
static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq)
|
707 |
{ |
708 |
VirtQueueElement elem; |
709 |
int32_t num_packets = 0;
|
710 |
if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
711 |
return num_packets;
|
712 |
} |
713 |
|
714 |
assert(n->vdev.vm_running); |
715 |
|
716 |
if (n->async_tx.elem.out_num) {
|
717 |
virtio_queue_set_notification(n->tx_vq, 0);
|
718 |
return num_packets;
|
719 |
} |
720 |
|
721 |
while (virtqueue_pop(vq, &elem)) {
|
722 |
ssize_t ret, len = 0;
|
723 |
unsigned int out_num = elem.out_num; |
724 |
struct iovec *out_sg = &elem.out_sg[0]; |
725 |
unsigned hdr_len;
|
726 |
|
727 |
/* hdr_len refers to the header received from the guest */
|
728 |
hdr_len = n->mergeable_rx_bufs ? |
729 |
sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
730 |
sizeof(struct virtio_net_hdr); |
731 |
|
732 |
if (out_num < 1 || out_sg->iov_len != hdr_len) { |
733 |
error_report("virtio-net header not in first element");
|
734 |
exit(1);
|
735 |
} |
736 |
|
737 |
/* ignore the header if GSO is not supported */
|
738 |
if (!n->has_vnet_hdr) {
|
739 |
out_num--; |
740 |
out_sg++; |
741 |
len += hdr_len; |
742 |
} else if (n->mergeable_rx_bufs) { |
743 |
/* tapfd expects a struct virtio_net_hdr */
|
744 |
hdr_len -= sizeof(struct virtio_net_hdr); |
745 |
out_sg->iov_len -= hdr_len; |
746 |
len += hdr_len; |
747 |
} |
748 |
|
749 |
ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
750 |
virtio_net_tx_complete); |
751 |
if (ret == 0) { |
752 |
virtio_queue_set_notification(n->tx_vq, 0);
|
753 |
n->async_tx.elem = elem; |
754 |
n->async_tx.len = len; |
755 |
return -EBUSY;
|
756 |
} |
757 |
|
758 |
len += ret; |
759 |
|
760 |
virtqueue_push(vq, &elem, len); |
761 |
virtio_notify(&n->vdev, vq); |
762 |
|
763 |
if (++num_packets >= n->tx_burst) {
|
764 |
break;
|
765 |
} |
766 |
} |
767 |
return num_packets;
|
768 |
} |
769 |
|
770 |
static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
771 |
{ |
772 |
VirtIONet *n = to_virtio_net(vdev); |
773 |
|
774 |
/* This happens when device was stopped but VCPU wasn't. */
|
775 |
if (!n->vdev.vm_running) {
|
776 |
n->tx_waiting = 1;
|
777 |
return;
|
778 |
} |
779 |
|
780 |
if (n->tx_waiting) {
|
781 |
virtio_queue_set_notification(vq, 1);
|
782 |
qemu_del_timer(n->tx_timer); |
783 |
n->tx_waiting = 0;
|
784 |
virtio_net_flush_tx(n, vq); |
785 |
} else {
|
786 |
qemu_mod_timer(n->tx_timer, |
787 |
qemu_get_clock(vm_clock) + n->tx_timeout); |
788 |
n->tx_waiting = 1;
|
789 |
virtio_queue_set_notification(vq, 0);
|
790 |
} |
791 |
} |
792 |
|
793 |
static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
794 |
{ |
795 |
VirtIONet *n = to_virtio_net(vdev); |
796 |
|
797 |
if (unlikely(n->tx_waiting)) {
|
798 |
return;
|
799 |
} |
800 |
n->tx_waiting = 1;
|
801 |
/* This happens when device was stopped but VCPU wasn't. */
|
802 |
if (!n->vdev.vm_running) {
|
803 |
return;
|
804 |
} |
805 |
virtio_queue_set_notification(vq, 0);
|
806 |
qemu_bh_schedule(n->tx_bh); |
807 |
} |
808 |
|
809 |
static void virtio_net_tx_timer(void *opaque) |
810 |
{ |
811 |
VirtIONet *n = opaque; |
812 |
assert(n->vdev.vm_running); |
813 |
|
814 |
n->tx_waiting = 0;
|
815 |
|
816 |
/* Just in case the driver is not ready on more */
|
817 |
if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
818 |
return;
|
819 |
|
820 |
virtio_queue_set_notification(n->tx_vq, 1);
|
821 |
virtio_net_flush_tx(n, n->tx_vq); |
822 |
} |
823 |
|
824 |
static void virtio_net_tx_bh(void *opaque) |
825 |
{ |
826 |
VirtIONet *n = opaque; |
827 |
int32_t ret; |
828 |
|
829 |
assert(n->vdev.vm_running); |
830 |
|
831 |
n->tx_waiting = 0;
|
832 |
|
833 |
/* Just in case the driver is not ready on more */
|
834 |
if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)))
|
835 |
return;
|
836 |
|
837 |
ret = virtio_net_flush_tx(n, n->tx_vq); |
838 |
if (ret == -EBUSY) {
|
839 |
return; /* Notification re-enable handled by tx_complete */ |
840 |
} |
841 |
|
842 |
/* If we flush a full burst of packets, assume there are
|
843 |
* more coming and immediately reschedule */
|
844 |
if (ret >= n->tx_burst) {
|
845 |
qemu_bh_schedule(n->tx_bh); |
846 |
n->tx_waiting = 1;
|
847 |
return;
|
848 |
} |
849 |
|
850 |
/* If less than a full burst, re-enable notification and flush
|
851 |
* anything that may have come in while we weren't looking. If
|
852 |
* we find something, assume the guest is still active and reschedule */
|
853 |
virtio_queue_set_notification(n->tx_vq, 1);
|
854 |
if (virtio_net_flush_tx(n, n->tx_vq) > 0) { |
855 |
virtio_queue_set_notification(n->tx_vq, 0);
|
856 |
qemu_bh_schedule(n->tx_bh); |
857 |
n->tx_waiting = 1;
|
858 |
} |
859 |
} |
860 |
|
861 |
static void virtio_net_save(QEMUFile *f, void *opaque) |
862 |
{ |
863 |
VirtIONet *n = opaque; |
864 |
|
865 |
/* At this point, backend must be stopped, otherwise
|
866 |
* it might keep writing to memory. */
|
867 |
assert(!n->vhost_started); |
868 |
virtio_save(&n->vdev, f); |
869 |
|
870 |
qemu_put_buffer(f, n->mac, ETH_ALEN); |
871 |
qemu_put_be32(f, n->tx_waiting); |
872 |
qemu_put_be32(f, n->mergeable_rx_bufs); |
873 |
qemu_put_be16(f, n->status); |
874 |
qemu_put_byte(f, n->promisc); |
875 |
qemu_put_byte(f, n->allmulti); |
876 |
qemu_put_be32(f, n->mac_table.in_use); |
877 |
qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
878 |
qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
879 |
qemu_put_be32(f, n->has_vnet_hdr); |
880 |
qemu_put_byte(f, n->mac_table.multi_overflow); |
881 |
qemu_put_byte(f, n->mac_table.uni_overflow); |
882 |
qemu_put_byte(f, n->alluni); |
883 |
qemu_put_byte(f, n->nomulti); |
884 |
qemu_put_byte(f, n->nouni); |
885 |
qemu_put_byte(f, n->nobcast); |
886 |
qemu_put_byte(f, n->has_ufo); |
887 |
} |
888 |
|
889 |
static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
890 |
{ |
891 |
VirtIONet *n = opaque; |
892 |
int i;
|
893 |
|
894 |
if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
895 |
return -EINVAL;
|
896 |
|
897 |
virtio_load(&n->vdev, f); |
898 |
|
899 |
qemu_get_buffer(f, n->mac, ETH_ALEN); |
900 |
n->tx_waiting = qemu_get_be32(f); |
901 |
n->mergeable_rx_bufs = qemu_get_be32(f); |
902 |
|
903 |
if (version_id >= 3) |
904 |
n->status = qemu_get_be16(f); |
905 |
|
906 |
if (version_id >= 4) { |
907 |
if (version_id < 8) { |
908 |
n->promisc = qemu_get_be32(f); |
909 |
n->allmulti = qemu_get_be32(f); |
910 |
} else {
|
911 |
n->promisc = qemu_get_byte(f); |
912 |
n->allmulti = qemu_get_byte(f); |
913 |
} |
914 |
} |
915 |
|
916 |
if (version_id >= 5) { |
917 |
n->mac_table.in_use = qemu_get_be32(f); |
918 |
/* MAC_TABLE_ENTRIES may be different from the saved image */
|
919 |
if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
920 |
qemu_get_buffer(f, n->mac_table.macs, |
921 |
n->mac_table.in_use * ETH_ALEN); |
922 |
} else if (n->mac_table.in_use) { |
923 |
qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); |
924 |
n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
925 |
n->mac_table.in_use = 0;
|
926 |
} |
927 |
} |
928 |
|
929 |
if (version_id >= 6) |
930 |
qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
931 |
|
932 |
if (version_id >= 7) { |
933 |
if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
934 |
error_report("virtio-net: saved image requires vnet_hdr=on");
|
935 |
return -1; |
936 |
} |
937 |
|
938 |
if (n->has_vnet_hdr) {
|
939 |
tap_using_vnet_hdr(n->nic->nc.peer, 1);
|
940 |
tap_set_offload(n->nic->nc.peer, |
941 |
(n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
942 |
(n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
943 |
(n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
944 |
(n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
945 |
(n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
946 |
} |
947 |
} |
948 |
|
949 |
if (version_id >= 9) { |
950 |
n->mac_table.multi_overflow = qemu_get_byte(f); |
951 |
n->mac_table.uni_overflow = qemu_get_byte(f); |
952 |
} |
953 |
|
954 |
if (version_id >= 10) { |
955 |
n->alluni = qemu_get_byte(f); |
956 |
n->nomulti = qemu_get_byte(f); |
957 |
n->nouni = qemu_get_byte(f); |
958 |
n->nobcast = qemu_get_byte(f); |
959 |
} |
960 |
|
961 |
if (version_id >= 11) { |
962 |
if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
963 |
error_report("virtio-net: saved image requires TUN_F_UFO support");
|
964 |
return -1; |
965 |
} |
966 |
} |
967 |
|
968 |
/* Find the first multicast entry in the saved MAC filter */
|
969 |
for (i = 0; i < n->mac_table.in_use; i++) { |
970 |
if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
971 |
break;
|
972 |
} |
973 |
} |
974 |
n->mac_table.first_multi = i; |
975 |
return 0; |
976 |
} |
977 |
|
978 |
static void virtio_net_cleanup(VLANClientState *nc) |
979 |
{ |
980 |
VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
981 |
|
982 |
n->nic = NULL;
|
983 |
} |
984 |
|
985 |
static NetClientInfo net_virtio_info = {
|
986 |
.type = NET_CLIENT_TYPE_NIC, |
987 |
.size = sizeof(NICState),
|
988 |
.can_receive = virtio_net_can_receive, |
989 |
.receive = virtio_net_receive, |
990 |
.cleanup = virtio_net_cleanup, |
991 |
.link_status_changed = virtio_net_set_link_status, |
992 |
}; |
993 |
|
994 |
VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
995 |
virtio_net_conf *net) |
996 |
{ |
997 |
VirtIONet *n; |
998 |
|
999 |
n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
|
1000 |
sizeof(struct virtio_net_config), |
1001 |
sizeof(VirtIONet));
|
1002 |
|
1003 |
n->vdev.get_config = virtio_net_get_config; |
1004 |
n->vdev.set_config = virtio_net_set_config; |
1005 |
n->vdev.get_features = virtio_net_get_features; |
1006 |
n->vdev.set_features = virtio_net_set_features; |
1007 |
n->vdev.bad_features = virtio_net_bad_features; |
1008 |
n->vdev.reset = virtio_net_reset; |
1009 |
n->vdev.set_status = virtio_net_set_status; |
1010 |
n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
|
1011 |
|
1012 |
if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { |
1013 |
error_report("virtio-net: "
|
1014 |
"Unknown option tx=%s, valid options: \"timer\" \"bh\"",
|
1015 |
net->tx); |
1016 |
error_report("Defaulting to \"bh\"");
|
1017 |
} |
1018 |
|
1019 |
if (net->tx && !strcmp(net->tx, "timer")) { |
1020 |
n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_timer);
|
1021 |
n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
1022 |
n->tx_timeout = net->txtimer; |
1023 |
} else {
|
1024 |
n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_bh);
|
1025 |
n->tx_bh = qemu_bh_new(virtio_net_tx_bh, n); |
1026 |
} |
1027 |
n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
|
1028 |
qemu_macaddr_default_if_unset(&conf->macaddr); |
1029 |
memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
1030 |
n->status = VIRTIO_NET_S_LINK_UP; |
1031 |
|
1032 |
n->nic = qemu_new_nic(&net_virtio_info, conf, dev->info->name, dev->id, n); |
1033 |
|
1034 |
qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); |
1035 |
|
1036 |
n->tx_waiting = 0;
|
1037 |
n->tx_burst = net->txburst; |
1038 |
n->mergeable_rx_bufs = 0;
|
1039 |
n->promisc = 1; /* for compatibility */ |
1040 |
|
1041 |
n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
1042 |
|
1043 |
n->vlans = qemu_mallocz(MAX_VLAN >> 3);
|
1044 |
|
1045 |
n->qdev = dev; |
1046 |
register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, |
1047 |
virtio_net_save, virtio_net_load, n); |
1048 |
|
1049 |
add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0");
|
1050 |
|
1051 |
return &n->vdev;
|
1052 |
} |
1053 |
|
1054 |
void virtio_net_exit(VirtIODevice *vdev)
|
1055 |
{ |
1056 |
VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); |
1057 |
|
1058 |
/* This will stop vhost backend if appropriate. */
|
1059 |
virtio_net_set_status(vdev, 0);
|
1060 |
|
1061 |
qemu_purge_queued_packets(&n->nic->nc); |
1062 |
|
1063 |
unregister_savevm(n->qdev, "virtio-net", n);
|
1064 |
|
1065 |
qemu_free(n->mac_table.macs); |
1066 |
qemu_free(n->vlans); |
1067 |
|
1068 |
if (n->tx_timer) {
|
1069 |
qemu_del_timer(n->tx_timer); |
1070 |
qemu_free_timer(n->tx_timer); |
1071 |
} else {
|
1072 |
qemu_bh_delete(n->tx_bh); |
1073 |
} |
1074 |
|
1075 |
virtio_cleanup(&n->vdev); |
1076 |
qemu_del_vlan_client(&n->nic->nc); |
1077 |
} |