virtio-net: remove virtio queues if the guest doesn't support multiqueue
[qemu.git] / hw / net / virtio-net.c
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 "qemu/iov.h"
15 #include "hw/virtio/virtio.h"
16 #include "net/net.h"
17 #include "net/checksum.h"
18 #include "net/tap.h"
19 #include "qemu/error-report.h"
20 #include "qemu/timer.h"
21 #include "hw/virtio/virtio-net.h"
22 #include "net/vhost_net.h"
23 #include "hw/virtio/virtio-bus.h"
24 #include "qapi/qmp/qjson.h"
25 #include "qapi-event.h"
26 #include "hw/virtio/virtio-access.h"
27
28 #define VIRTIO_NET_VM_VERSION 11
29
30 #define MAC_TABLE_ENTRIES 64
31 #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */
32
33 /*
34 * Calculate the number of bytes up to and including the given 'field' of
35 * 'container'.
36 */
37 #define endof(container, field) \
38 (offsetof(container, field) + sizeof(((container *)0)->field))
39
40 typedef struct VirtIOFeature {
41 uint32_t flags;
42 size_t end;
43 } VirtIOFeature;
44
45 static VirtIOFeature feature_sizes[] = {
46 {.flags = 1 << VIRTIO_NET_F_MAC,
47 .end = endof(struct virtio_net_config, mac)},
48 {.flags = 1 << VIRTIO_NET_F_STATUS,
49 .end = endof(struct virtio_net_config, status)},
50 {.flags = 1 << VIRTIO_NET_F_MQ,
51 .end = endof(struct virtio_net_config, max_virtqueue_pairs)},
52 {}
53 };
54
55 static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc)
56 {
57 VirtIONet *n = qemu_get_nic_opaque(nc);
58
59 return &n->vqs[nc->queue_index];
60 }
61
62 static int vq2q(int queue_index)
63 {
64 return queue_index / 2;
65 }
66
67 /* TODO
68 * - we could suppress RX interrupt if we were so inclined.
69 */
70
71 static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
72 {
73 VirtIONet *n = VIRTIO_NET(vdev);
74 struct virtio_net_config netcfg;
75
76 virtio_stw_p(vdev, &netcfg.status, n->status);
77 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues);
78 memcpy(netcfg.mac, n->mac, ETH_ALEN);
79 memcpy(config, &netcfg, n->config_size);
80 }
81
82 static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config)
83 {
84 VirtIONet *n = VIRTIO_NET(vdev);
85 struct virtio_net_config netcfg = {};
86
87 memcpy(&netcfg, config, n->config_size);
88
89 if (!virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) &&
90 !virtio_has_feature(vdev, VIRTIO_F_VERSION_1) &&
91 memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
92 memcpy(n->mac, netcfg.mac, ETH_ALEN);
93 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
94 }
95 }
96
97 static bool virtio_net_started(VirtIONet *n, uint8_t status)
98 {
99 VirtIODevice *vdev = VIRTIO_DEVICE(n);
100 return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
101 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running;
102 }
103
104 static void virtio_net_announce_timer(void *opaque)
105 {
106 VirtIONet *n = opaque;
107 VirtIODevice *vdev = VIRTIO_DEVICE(n);
108
109 n->announce_counter--;
110 n->status |= VIRTIO_NET_S_ANNOUNCE;
111 virtio_notify_config(vdev);
112 }
113
114 static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
115 {
116 VirtIODevice *vdev = VIRTIO_DEVICE(n);
117 NetClientState *nc = qemu_get_queue(n->nic);
118 int queues = n->multiqueue ? n->max_queues : 1;
119
120 if (!get_vhost_net(nc->peer)) {
121 return;
122 }
123
124 if ((virtio_net_started(n, status) && !nc->peer->link_down) ==
125 !!n->vhost_started) {
126 return;
127 }
128 if (!n->vhost_started) {
129 int r, i;
130
131 /* Any packets outstanding? Purge them to avoid touching rings
132 * when vhost is running.
133 */
134 for (i = 0; i < queues; i++) {
135 NetClientState *qnc = qemu_get_subqueue(n->nic, i);
136
137 /* Purge both directions: TX and RX. */
138 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc);
139 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer);
140 }
141
142 n->vhost_started = 1;
143 r = vhost_net_start(vdev, n->nic->ncs, queues);
144 if (r < 0) {
145 error_report("unable to start vhost net: %d: "
146 "falling back on userspace virtio", -r);
147 n->vhost_started = 0;
148 }
149 } else {
150 vhost_net_stop(vdev, n->nic->ncs, queues);
151 n->vhost_started = 0;
152 }
153 }
154
155 static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status)
156 {
157 VirtIONet *n = VIRTIO_NET(vdev);
158 VirtIONetQueue *q;
159 int i;
160 uint8_t queue_status;
161
162 virtio_net_vhost_status(n, status);
163
164 for (i = 0; i < n->max_queues; i++) {
165 NetClientState *ncs = qemu_get_subqueue(n->nic, i);
166 bool queue_started;
167 q = &n->vqs[i];
168
169 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) {
170 queue_status = 0;
171 } else {
172 queue_status = status;
173 }
174 queue_started =
175 virtio_net_started(n, queue_status) && !n->vhost_started;
176
177 if (queue_started) {
178 qemu_flush_queued_packets(ncs);
179 }
180
181 if (!q->tx_waiting) {
182 continue;
183 }
184
185 if (queue_started) {
186 if (q->tx_timer) {
187 timer_mod(q->tx_timer,
188 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout);
189 } else {
190 qemu_bh_schedule(q->tx_bh);
191 }
192 } else {
193 if (q->tx_timer) {
194 timer_del(q->tx_timer);
195 } else {
196 qemu_bh_cancel(q->tx_bh);
197 }
198 }
199 }
200 }
201
202 static void virtio_net_set_link_status(NetClientState *nc)
203 {
204 VirtIONet *n = qemu_get_nic_opaque(nc);
205 VirtIODevice *vdev = VIRTIO_DEVICE(n);
206 uint16_t old_status = n->status;
207
208 if (nc->link_down)
209 n->status &= ~VIRTIO_NET_S_LINK_UP;
210 else
211 n->status |= VIRTIO_NET_S_LINK_UP;
212
213 if (n->status != old_status)
214 virtio_notify_config(vdev);
215
216 virtio_net_set_status(vdev, vdev->status);
217 }
218
219 static void rxfilter_notify(NetClientState *nc)
220 {
221 VirtIONet *n = qemu_get_nic_opaque(nc);
222
223 if (nc->rxfilter_notify_enabled) {
224 gchar *path = object_get_canonical_path(OBJECT(n->qdev));
225 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name,
226 n->netclient_name, path, &error_abort);
227 g_free(path);
228
229 /* disable event notification to avoid events flooding */
230 nc->rxfilter_notify_enabled = 0;
231 }
232 }
233
234 static intList *get_vlan_table(VirtIONet *n)
235 {
236 intList *list, *entry;
237 int i, j;
238
239 list = NULL;
240 for (i = 0; i < MAX_VLAN >> 5; i++) {
241 for (j = 0; n->vlans[i] && j <= 0x1f; j++) {
242 if (n->vlans[i] & (1U << j)) {
243 entry = g_malloc0(sizeof(*entry));
244 entry->value = (i << 5) + j;
245 entry->next = list;
246 list = entry;
247 }
248 }
249 }
250
251 return list;
252 }
253
254 static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc)
255 {
256 VirtIONet *n = qemu_get_nic_opaque(nc);
257 VirtIODevice *vdev = VIRTIO_DEVICE(n);
258 RxFilterInfo *info;
259 strList *str_list, *entry;
260 int i;
261
262 info = g_malloc0(sizeof(*info));
263 info->name = g_strdup(nc->name);
264 info->promiscuous = n->promisc;
265
266 if (n->nouni) {
267 info->unicast = RX_STATE_NONE;
268 } else if (n->alluni) {
269 info->unicast = RX_STATE_ALL;
270 } else {
271 info->unicast = RX_STATE_NORMAL;
272 }
273
274 if (n->nomulti) {
275 info->multicast = RX_STATE_NONE;
276 } else if (n->allmulti) {
277 info->multicast = RX_STATE_ALL;
278 } else {
279 info->multicast = RX_STATE_NORMAL;
280 }
281
282 info->broadcast_allowed = n->nobcast;
283 info->multicast_overflow = n->mac_table.multi_overflow;
284 info->unicast_overflow = n->mac_table.uni_overflow;
285
286 info->main_mac = qemu_mac_strdup_printf(n->mac);
287
288 str_list = NULL;
289 for (i = 0; i < n->mac_table.first_multi; i++) {
290 entry = g_malloc0(sizeof(*entry));
291 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN);
292 entry->next = str_list;
293 str_list = entry;
294 }
295 info->unicast_table = str_list;
296
297 str_list = NULL;
298 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
299 entry = g_malloc0(sizeof(*entry));
300 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN);
301 entry->next = str_list;
302 str_list = entry;
303 }
304 info->multicast_table = str_list;
305 info->vlan_table = get_vlan_table(n);
306
307 if (!virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) {
308 info->vlan = RX_STATE_ALL;
309 } else if (!info->vlan_table) {
310 info->vlan = RX_STATE_NONE;
311 } else {
312 info->vlan = RX_STATE_NORMAL;
313 }
314
315 /* enable event notification after query */
316 nc->rxfilter_notify_enabled = 1;
317
318 return info;
319 }
320
321 static void virtio_net_reset(VirtIODevice *vdev)
322 {
323 VirtIONet *n = VIRTIO_NET(vdev);
324
325 /* Reset back to compatibility mode */
326 n->promisc = 1;
327 n->allmulti = 0;
328 n->alluni = 0;
329 n->nomulti = 0;
330 n->nouni = 0;
331 n->nobcast = 0;
332 /* multiqueue is disabled by default */
333 n->curr_queues = 1;
334 timer_del(n->announce_timer);
335 n->announce_counter = 0;
336 n->status &= ~VIRTIO_NET_S_ANNOUNCE;
337
338 /* Flush any MAC and VLAN filter table state */
339 n->mac_table.in_use = 0;
340 n->mac_table.first_multi = 0;
341 n->mac_table.multi_overflow = 0;
342 n->mac_table.uni_overflow = 0;
343 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
344 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac));
345 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
346 memset(n->vlans, 0, MAX_VLAN >> 3);
347 }
348
349 static void peer_test_vnet_hdr(VirtIONet *n)
350 {
351 NetClientState *nc = qemu_get_queue(n->nic);
352 if (!nc->peer) {
353 return;
354 }
355
356 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer);
357 }
358
359 static int peer_has_vnet_hdr(VirtIONet *n)
360 {
361 return n->has_vnet_hdr;
362 }
363
364 static int peer_has_ufo(VirtIONet *n)
365 {
366 if (!peer_has_vnet_hdr(n))
367 return 0;
368
369 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer);
370
371 return n->has_ufo;
372 }
373
374 static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs,
375 int version_1)
376 {
377 int i;
378 NetClientState *nc;
379
380 n->mergeable_rx_bufs = mergeable_rx_bufs;
381
382 if (version_1) {
383 n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
384 } else {
385 n->guest_hdr_len = n->mergeable_rx_bufs ?
386 sizeof(struct virtio_net_hdr_mrg_rxbuf) :
387 sizeof(struct virtio_net_hdr);
388 }
389
390 for (i = 0; i < n->max_queues; i++) {
391 nc = qemu_get_subqueue(n->nic, i);
392
393 if (peer_has_vnet_hdr(n) &&
394 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) {
395 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len);
396 n->host_hdr_len = n->guest_hdr_len;
397 }
398 }
399 }
400
401 static int peer_attach(VirtIONet *n, int index)
402 {
403 NetClientState *nc = qemu_get_subqueue(n->nic, index);
404
405 if (!nc->peer) {
406 return 0;
407 }
408
409 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
410 return 0;
411 }
412
413 return tap_enable(nc->peer);
414 }
415
416 static int peer_detach(VirtIONet *n, int index)
417 {
418 NetClientState *nc = qemu_get_subqueue(n->nic, index);
419
420 if (!nc->peer) {
421 return 0;
422 }
423
424 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
425 return 0;
426 }
427
428 return tap_disable(nc->peer);
429 }
430
431 static void virtio_net_set_queues(VirtIONet *n)
432 {
433 int i;
434 int r;
435
436 for (i = 0; i < n->max_queues; i++) {
437 if (i < n->curr_queues) {
438 r = peer_attach(n, i);
439 assert(!r);
440 } else {
441 r = peer_detach(n, i);
442 assert(!r);
443 }
444 }
445 }
446
447 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue);
448
449 static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features)
450 {
451 VirtIONet *n = VIRTIO_NET(vdev);
452 NetClientState *nc = qemu_get_queue(n->nic);
453
454 /* Firstly sync all virtio-net possible supported features */
455 features |= n->host_features;
456
457 virtio_add_feature(&features, VIRTIO_NET_F_MAC);
458
459 if (!peer_has_vnet_hdr(n)) {
460 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM);
461 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4);
462 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6);
463 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN);
464
465 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM);
466 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4);
467 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6);
468 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN);
469 }
470
471 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
472 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO);
473 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO);
474 }
475
476 if (!get_vhost_net(nc->peer)) {
477 return features;
478 }
479 return vhost_net_get_features(get_vhost_net(nc->peer), features);
480 }
481
482 static uint64_t virtio_net_bad_features(VirtIODevice *vdev)
483 {
484 uint64_t features = 0;
485
486 /* Linux kernel 2.6.25. It understood MAC (as everyone must),
487 * but also these: */
488 virtio_add_feature(&features, VIRTIO_NET_F_MAC);
489 virtio_add_feature(&features, VIRTIO_NET_F_CSUM);
490 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4);
491 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6);
492 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN);
493
494 return features;
495 }
496
497 static void virtio_net_apply_guest_offloads(VirtIONet *n)
498 {
499 qemu_set_offload(qemu_get_queue(n->nic)->peer,
500 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)),
501 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)),
502 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)),
503 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)),
504 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO)));
505 }
506
507 static uint64_t virtio_net_guest_offloads_by_features(uint32_t features)
508 {
509 static const uint64_t guest_offloads_mask =
510 (1ULL << VIRTIO_NET_F_GUEST_CSUM) |
511 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
512 (1ULL << VIRTIO_NET_F_GUEST_TSO6) |
513 (1ULL << VIRTIO_NET_F_GUEST_ECN) |
514 (1ULL << VIRTIO_NET_F_GUEST_UFO);
515
516 return guest_offloads_mask & features;
517 }
518
519 static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n)
520 {
521 VirtIODevice *vdev = VIRTIO_DEVICE(n);
522 return virtio_net_guest_offloads_by_features(vdev->guest_features);
523 }
524
525 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
526 {
527 VirtIONet *n = VIRTIO_NET(vdev);
528 int i;
529
530 virtio_net_set_multiqueue(n,
531 __virtio_has_feature(features, VIRTIO_NET_F_MQ));
532
533 virtio_net_set_mrg_rx_bufs(n,
534 __virtio_has_feature(features,
535 VIRTIO_NET_F_MRG_RXBUF),
536 __virtio_has_feature(features,
537 VIRTIO_F_VERSION_1));
538
539 if (n->has_vnet_hdr) {
540 n->curr_guest_offloads =
541 virtio_net_guest_offloads_by_features(features);
542 virtio_net_apply_guest_offloads(n);
543 }
544
545 for (i = 0; i < n->max_queues; i++) {
546 NetClientState *nc = qemu_get_subqueue(n->nic, i);
547
548 if (!get_vhost_net(nc->peer)) {
549 continue;
550 }
551 vhost_net_ack_features(get_vhost_net(nc->peer), features);
552 }
553
554 if (__virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) {
555 memset(n->vlans, 0, MAX_VLAN >> 3);
556 } else {
557 memset(n->vlans, 0xff, MAX_VLAN >> 3);
558 }
559 }
560
561 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
562 struct iovec *iov, unsigned int iov_cnt)
563 {
564 uint8_t on;
565 size_t s;
566 NetClientState *nc = qemu_get_queue(n->nic);
567
568 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on));
569 if (s != sizeof(on)) {
570 return VIRTIO_NET_ERR;
571 }
572
573 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) {
574 n->promisc = on;
575 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) {
576 n->allmulti = on;
577 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) {
578 n->alluni = on;
579 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) {
580 n->nomulti = on;
581 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) {
582 n->nouni = on;
583 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) {
584 n->nobcast = on;
585 } else {
586 return VIRTIO_NET_ERR;
587 }
588
589 rxfilter_notify(nc);
590
591 return VIRTIO_NET_OK;
592 }
593
594 static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd,
595 struct iovec *iov, unsigned int iov_cnt)
596 {
597 VirtIODevice *vdev = VIRTIO_DEVICE(n);
598 uint64_t offloads;
599 size_t s;
600
601 if (!virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
602 return VIRTIO_NET_ERR;
603 }
604
605 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads));
606 if (s != sizeof(offloads)) {
607 return VIRTIO_NET_ERR;
608 }
609
610 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) {
611 uint64_t supported_offloads;
612
613 if (!n->has_vnet_hdr) {
614 return VIRTIO_NET_ERR;
615 }
616
617 supported_offloads = virtio_net_supported_guest_offloads(n);
618 if (offloads & ~supported_offloads) {
619 return VIRTIO_NET_ERR;
620 }
621
622 n->curr_guest_offloads = offloads;
623 virtio_net_apply_guest_offloads(n);
624
625 return VIRTIO_NET_OK;
626 } else {
627 return VIRTIO_NET_ERR;
628 }
629 }
630
631 static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
632 struct iovec *iov, unsigned int iov_cnt)
633 {
634 VirtIODevice *vdev = VIRTIO_DEVICE(n);
635 struct virtio_net_ctrl_mac mac_data;
636 size_t s;
637 NetClientState *nc = qemu_get_queue(n->nic);
638
639 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) {
640 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) {
641 return VIRTIO_NET_ERR;
642 }
643 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac));
644 assert(s == sizeof(n->mac));
645 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
646 rxfilter_notify(nc);
647
648 return VIRTIO_NET_OK;
649 }
650
651 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) {
652 return VIRTIO_NET_ERR;
653 }
654
655 int in_use = 0;
656 int first_multi = 0;
657 uint8_t uni_overflow = 0;
658 uint8_t multi_overflow = 0;
659 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);
660
661 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
662 sizeof(mac_data.entries));
663 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries);
664 if (s != sizeof(mac_data.entries)) {
665 goto error;
666 }
667 iov_discard_front(&iov, &iov_cnt, s);
668
669 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) {
670 goto error;
671 }
672
673 if (mac_data.entries <= MAC_TABLE_ENTRIES) {
674 s = iov_to_buf(iov, iov_cnt, 0, macs,
675 mac_data.entries * ETH_ALEN);
676 if (s != mac_data.entries * ETH_ALEN) {
677 goto error;
678 }
679 in_use += mac_data.entries;
680 } else {
681 uni_overflow = 1;
682 }
683
684 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN);
685
686 first_multi = in_use;
687
688 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
689 sizeof(mac_data.entries));
690 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries);
691 if (s != sizeof(mac_data.entries)) {
692 goto error;
693 }
694
695 iov_discard_front(&iov, &iov_cnt, s);
696
697 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) {
698 goto error;
699 }
700
701 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) {
702 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN],
703 mac_data.entries * ETH_ALEN);
704 if (s != mac_data.entries * ETH_ALEN) {
705 goto error;
706 }
707 in_use += mac_data.entries;
708 } else {
709 multi_overflow = 1;
710 }
711
712 n->mac_table.in_use = in_use;
713 n->mac_table.first_multi = first_multi;
714 n->mac_table.uni_overflow = uni_overflow;
715 n->mac_table.multi_overflow = multi_overflow;
716 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN);
717 g_free(macs);
718 rxfilter_notify(nc);
719
720 return VIRTIO_NET_OK;
721
722 error:
723 g_free(macs);
724 return VIRTIO_NET_ERR;
725 }
726
727 static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd,
728 struct iovec *iov, unsigned int iov_cnt)
729 {
730 VirtIODevice *vdev = VIRTIO_DEVICE(n);
731 uint16_t vid;
732 size_t s;
733 NetClientState *nc = qemu_get_queue(n->nic);
734
735 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid));
736 vid = virtio_lduw_p(vdev, &vid);
737 if (s != sizeof(vid)) {
738 return VIRTIO_NET_ERR;
739 }
740
741 if (vid >= MAX_VLAN)
742 return VIRTIO_NET_ERR;
743
744 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
745 n->vlans[vid >> 5] |= (1U << (vid & 0x1f));
746 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL)
747 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f));
748 else
749 return VIRTIO_NET_ERR;
750
751 rxfilter_notify(nc);
752
753 return VIRTIO_NET_OK;
754 }
755
756 static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd,
757 struct iovec *iov, unsigned int iov_cnt)
758 {
759 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK &&
760 n->status & VIRTIO_NET_S_ANNOUNCE) {
761 n->status &= ~VIRTIO_NET_S_ANNOUNCE;
762 if (n->announce_counter) {
763 timer_mod(n->announce_timer,
764 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
765 self_announce_delay(n->announce_counter));
766 }
767 return VIRTIO_NET_OK;
768 } else {
769 return VIRTIO_NET_ERR;
770 }
771 }
772
773 static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
774 struct iovec *iov, unsigned int iov_cnt)
775 {
776 VirtIODevice *vdev = VIRTIO_DEVICE(n);
777 struct virtio_net_ctrl_mq mq;
778 size_t s;
779 uint16_t queues;
780
781 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq));
782 if (s != sizeof(mq)) {
783 return VIRTIO_NET_ERR;
784 }
785
786 if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
787 return VIRTIO_NET_ERR;
788 }
789
790 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs);
791
792 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
793 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX ||
794 queues > n->max_queues ||
795 !n->multiqueue) {
796 return VIRTIO_NET_ERR;
797 }
798
799 n->curr_queues = queues;
800 /* stop the backend before changing the number of queues to avoid handling a
801 * disabled queue */
802 virtio_net_set_status(vdev, vdev->status);
803 virtio_net_set_queues(n);
804
805 return VIRTIO_NET_OK;
806 }
807 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
808 {
809 VirtIONet *n = VIRTIO_NET(vdev);
810 struct virtio_net_ctrl_hdr ctrl;
811 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
812 VirtQueueElement elem;
813 size_t s;
814 struct iovec *iov, *iov2;
815 unsigned int iov_cnt;
816
817 while (virtqueue_pop(vq, &elem)) {
818 if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) ||
819 iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) {
820 error_report("virtio-net ctrl missing headers");
821 exit(1);
822 }
823
824 iov_cnt = elem.out_num;
825 iov2 = iov = g_memdup(elem.out_sg, sizeof(struct iovec) * elem.out_num);
826 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl));
827 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl));
828 if (s != sizeof(ctrl)) {
829 status = VIRTIO_NET_ERR;
830 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) {
831 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt);
832 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) {
833 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt);
834 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) {
835 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt);
836 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) {
837 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt);
838 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) {
839 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt);
840 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) {
841 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt);
842 }
843
844 s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status));
845 assert(s == sizeof(status));
846
847 virtqueue_push(vq, &elem, sizeof(status));
848 virtio_notify(vdev, vq);
849 g_free(iov2);
850 }
851 }
852
853 /* RX */
854
855 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq)
856 {
857 VirtIONet *n = VIRTIO_NET(vdev);
858 int queue_index = vq2q(virtio_get_queue_index(vq));
859
860 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index));
861 }
862
863 static int virtio_net_can_receive(NetClientState *nc)
864 {
865 VirtIONet *n = qemu_get_nic_opaque(nc);
866 VirtIODevice *vdev = VIRTIO_DEVICE(n);
867 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
868
869 if (!vdev->vm_running) {
870 return 0;
871 }
872
873 if (nc->queue_index >= n->curr_queues) {
874 return 0;
875 }
876
877 if (!virtio_queue_ready(q->rx_vq) ||
878 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
879 return 0;
880 }
881
882 return 1;
883 }
884
885 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize)
886 {
887 VirtIONet *n = q->n;
888 if (virtio_queue_empty(q->rx_vq) ||
889 (n->mergeable_rx_bufs &&
890 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
891 virtio_queue_set_notification(q->rx_vq, 1);
892
893 /* To avoid a race condition where the guest has made some buffers
894 * available after the above check but before notification was
895 * enabled, check for available buffers again.
896 */
897 if (virtio_queue_empty(q->rx_vq) ||
898 (n->mergeable_rx_bufs &&
899 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
900 return 0;
901 }
902 }
903
904 virtio_queue_set_notification(q->rx_vq, 0);
905 return 1;
906 }
907
908 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr)
909 {
910 virtio_tswap16s(vdev, &hdr->hdr_len);
911 virtio_tswap16s(vdev, &hdr->gso_size);
912 virtio_tswap16s(vdev, &hdr->csum_start);
913 virtio_tswap16s(vdev, &hdr->csum_offset);
914 }
915
916 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
917 * it never finds out that the packets don't have valid checksums. This
918 * causes dhclient to get upset. Fedora's carried a patch for ages to
919 * fix this with Xen but it hasn't appeared in an upstream release of
920 * dhclient yet.
921 *
922 * To avoid breaking existing guests, we catch udp packets and add
923 * checksums. This is terrible but it's better than hacking the guest
924 * kernels.
925 *
926 * N.B. if we introduce a zero-copy API, this operation is no longer free so
927 * we should provide a mechanism to disable it to avoid polluting the host
928 * cache.
929 */
930 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr,
931 uint8_t *buf, size_t size)
932 {
933 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */
934 (size > 27 && size < 1500) && /* normal sized MTU */
935 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */
936 (buf[23] == 17) && /* ip.protocol == UDP */
937 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */
938 net_checksum_calculate(buf, size);
939 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM;
940 }
941 }
942
943 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt,
944 const void *buf, size_t size)
945 {
946 if (n->has_vnet_hdr) {
947 /* FIXME this cast is evil */
948 void *wbuf = (void *)buf;
949 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len,
950 size - n->host_hdr_len);
951 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf);
952 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr));
953 } else {
954 struct virtio_net_hdr hdr = {
955 .flags = 0,
956 .gso_type = VIRTIO_NET_HDR_GSO_NONE
957 };
958 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr);
959 }
960 }
961
962 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
963 {
964 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
965 static const uint8_t vlan[] = {0x81, 0x00};
966 uint8_t *ptr = (uint8_t *)buf;
967 int i;
968
969 if (n->promisc)
970 return 1;
971
972 ptr += n->host_hdr_len;
973
974 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) {
975 int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff;
976 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f))))
977 return 0;
978 }
979
980 if (ptr[0] & 1) { // multicast
981 if (!memcmp(ptr, bcast, sizeof(bcast))) {
982 return !n->nobcast;
983 } else if (n->nomulti) {
984 return 0;
985 } else if (n->allmulti || n->mac_table.multi_overflow) {
986 return 1;
987 }
988
989 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
990 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
991 return 1;
992 }
993 }
994 } else { // unicast
995 if (n->nouni) {
996 return 0;
997 } else if (n->alluni || n->mac_table.uni_overflow) {
998 return 1;
999 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) {
1000 return 1;
1001 }
1002
1003 for (i = 0; i < n->mac_table.first_multi; i++) {
1004 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
1005 return 1;
1006 }
1007 }
1008 }
1009
1010 return 0;
1011 }
1012
1013 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size)
1014 {
1015 VirtIONet *n = qemu_get_nic_opaque(nc);
1016 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
1017 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1018 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE];
1019 struct virtio_net_hdr_mrg_rxbuf mhdr;
1020 unsigned mhdr_cnt = 0;
1021 size_t offset, i, guest_offset;
1022
1023 if (!virtio_net_can_receive(nc)) {
1024 return -1;
1025 }
1026
1027 /* hdr_len refers to the header we supply to the guest */
1028 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) {
1029 return 0;
1030 }
1031
1032 if (!receive_filter(n, buf, size))
1033 return size;
1034
1035 offset = i = 0;
1036
1037 while (offset < size) {
1038 VirtQueueElement elem;
1039 int len, total;
1040 const struct iovec *sg = elem.in_sg;
1041
1042 total = 0;
1043
1044 if (virtqueue_pop(q->rx_vq, &elem) == 0) {
1045 if (i == 0)
1046 return -1;
1047 error_report("virtio-net unexpected empty queue: "
1048 "i %zd mergeable %d offset %zd, size %zd, "
1049 "guest hdr len %zd, host hdr len %zd "
1050 "guest features 0x%" PRIx64,
1051 i, n->mergeable_rx_bufs, offset, size,
1052 n->guest_hdr_len, n->host_hdr_len,
1053 vdev->guest_features);
1054 exit(1);
1055 }
1056
1057 if (elem.in_num < 1) {
1058 error_report("virtio-net receive queue contains no in buffers");
1059 exit(1);
1060 }
1061
1062 if (i == 0) {
1063 assert(offset == 0);
1064 if (n->mergeable_rx_bufs) {
1065 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg),
1066 sg, elem.in_num,
1067 offsetof(typeof(mhdr), num_buffers),
1068 sizeof(mhdr.num_buffers));
1069 }
1070
1071 receive_header(n, sg, elem.in_num, buf, size);
1072 offset = n->host_hdr_len;
1073 total += n->guest_hdr_len;
1074 guest_offset = n->guest_hdr_len;
1075 } else {
1076 guest_offset = 0;
1077 }
1078
1079 /* copy in packet. ugh */
1080 len = iov_from_buf(sg, elem.in_num, guest_offset,
1081 buf + offset, size - offset);
1082 total += len;
1083 offset += len;
1084 /* If buffers can't be merged, at this point we
1085 * must have consumed the complete packet.
1086 * Otherwise, drop it. */
1087 if (!n->mergeable_rx_bufs && offset < size) {
1088 #if 0
1089 error_report("virtio-net truncated non-mergeable packet: "
1090 "i %zd mergeable %d offset %zd, size %zd, "
1091 "guest hdr len %zd, host hdr len %zd",
1092 i, n->mergeable_rx_bufs,
1093 offset, size, n->guest_hdr_len, n->host_hdr_len);
1094 #endif
1095 return size;
1096 }
1097
1098 /* signal other side */
1099 virtqueue_fill(q->rx_vq, &elem, total, i++);
1100 }
1101
1102 if (mhdr_cnt) {
1103 virtio_stw_p(vdev, &mhdr.num_buffers, i);
1104 iov_from_buf(mhdr_sg, mhdr_cnt,
1105 0,
1106 &mhdr.num_buffers, sizeof mhdr.num_buffers);
1107 }
1108
1109 virtqueue_flush(q->rx_vq, i);
1110 virtio_notify(vdev, q->rx_vq);
1111
1112 return size;
1113 }
1114
1115 static int32_t virtio_net_flush_tx(VirtIONetQueue *q);
1116
1117 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len)
1118 {
1119 VirtIONet *n = qemu_get_nic_opaque(nc);
1120 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
1121 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1122
1123 virtqueue_push(q->tx_vq, &q->async_tx.elem, 0);
1124 virtio_notify(vdev, q->tx_vq);
1125
1126 q->async_tx.elem.out_num = q->async_tx.len = 0;
1127
1128 virtio_queue_set_notification(q->tx_vq, 1);
1129 virtio_net_flush_tx(q);
1130 }
1131
1132 /* TX */
1133 static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
1134 {
1135 VirtIONet *n = q->n;
1136 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1137 VirtQueueElement elem;
1138 int32_t num_packets = 0;
1139 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
1140 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
1141 return num_packets;
1142 }
1143
1144 if (q->async_tx.elem.out_num) {
1145 virtio_queue_set_notification(q->tx_vq, 0);
1146 return num_packets;
1147 }
1148
1149 while (virtqueue_pop(q->tx_vq, &elem)) {
1150 ssize_t ret, len;
1151 unsigned int out_num = elem.out_num;
1152 struct iovec *out_sg = &elem.out_sg[0];
1153 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1];
1154 struct virtio_net_hdr_mrg_rxbuf mhdr;
1155
1156 if (out_num < 1) {
1157 error_report("virtio-net header not in first element");
1158 exit(1);
1159 }
1160
1161 if (n->has_vnet_hdr) {
1162 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) <
1163 n->guest_hdr_len) {
1164 error_report("virtio-net header incorrect");
1165 exit(1);
1166 }
1167 if (virtio_needs_swap(vdev)) {
1168 virtio_net_hdr_swap(vdev, (void *) &mhdr);
1169 sg2[0].iov_base = &mhdr;
1170 sg2[0].iov_len = n->guest_hdr_len;
1171 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1,
1172 out_sg, out_num,
1173 n->guest_hdr_len, -1);
1174 if (out_num == VIRTQUEUE_MAX_SIZE) {
1175 goto drop;
1176 }
1177 out_num += 1;
1178 out_sg = sg2;
1179 }
1180 }
1181 /*
1182 * If host wants to see the guest header as is, we can
1183 * pass it on unchanged. Otherwise, copy just the parts
1184 * that host is interested in.
1185 */
1186 assert(n->host_hdr_len <= n->guest_hdr_len);
1187 if (n->host_hdr_len != n->guest_hdr_len) {
1188 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg),
1189 out_sg, out_num,
1190 0, n->host_hdr_len);
1191 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num,
1192 out_sg, out_num,
1193 n->guest_hdr_len, -1);
1194 out_num = sg_num;
1195 out_sg = sg;
1196 }
1197
1198 len = n->guest_hdr_len;
1199
1200 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index),
1201 out_sg, out_num, virtio_net_tx_complete);
1202 if (ret == 0) {
1203 virtio_queue_set_notification(q->tx_vq, 0);
1204 q->async_tx.elem = elem;
1205 q->async_tx.len = len;
1206 return -EBUSY;
1207 }
1208
1209 len += ret;
1210 drop:
1211 virtqueue_push(q->tx_vq, &elem, 0);
1212 virtio_notify(vdev, q->tx_vq);
1213
1214 if (++num_packets >= n->tx_burst) {
1215 break;
1216 }
1217 }
1218 return num_packets;
1219 }
1220
1221 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq)
1222 {
1223 VirtIONet *n = VIRTIO_NET(vdev);
1224 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))];
1225
1226 /* This happens when device was stopped but VCPU wasn't. */
1227 if (!vdev->vm_running) {
1228 q->tx_waiting = 1;
1229 return;
1230 }
1231
1232 if (q->tx_waiting) {
1233 virtio_queue_set_notification(vq, 1);
1234 timer_del(q->tx_timer);
1235 q->tx_waiting = 0;
1236 virtio_net_flush_tx(q);
1237 } else {
1238 timer_mod(q->tx_timer,
1239 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout);
1240 q->tx_waiting = 1;
1241 virtio_queue_set_notification(vq, 0);
1242 }
1243 }
1244
1245 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq)
1246 {
1247 VirtIONet *n = VIRTIO_NET(vdev);
1248 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))];
1249
1250 if (unlikely(q->tx_waiting)) {
1251 return;
1252 }
1253 q->tx_waiting = 1;
1254 /* This happens when device was stopped but VCPU wasn't. */
1255 if (!vdev->vm_running) {
1256 return;
1257 }
1258 virtio_queue_set_notification(vq, 0);
1259 qemu_bh_schedule(q->tx_bh);
1260 }
1261
1262 static void virtio_net_tx_timer(void *opaque)
1263 {
1264 VirtIONetQueue *q = opaque;
1265 VirtIONet *n = q->n;
1266 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1267 /* This happens when device was stopped but BH wasn't. */
1268 if (!vdev->vm_running) {
1269 /* Make sure tx waiting is set, so we'll run when restarted. */
1270 assert(q->tx_waiting);
1271 return;
1272 }
1273
1274 q->tx_waiting = 0;
1275
1276 /* Just in case the driver is not ready on more */
1277 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
1278 return;
1279 }
1280
1281 virtio_queue_set_notification(q->tx_vq, 1);
1282 virtio_net_flush_tx(q);
1283 }
1284
1285 static void virtio_net_tx_bh(void *opaque)
1286 {
1287 VirtIONetQueue *q = opaque;
1288 VirtIONet *n = q->n;
1289 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1290 int32_t ret;
1291
1292 /* This happens when device was stopped but BH wasn't. */
1293 if (!vdev->vm_running) {
1294 /* Make sure tx waiting is set, so we'll run when restarted. */
1295 assert(q->tx_waiting);
1296 return;
1297 }
1298
1299 q->tx_waiting = 0;
1300
1301 /* Just in case the driver is not ready on more */
1302 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) {
1303 return;
1304 }
1305
1306 ret = virtio_net_flush_tx(q);
1307 if (ret == -EBUSY) {
1308 return; /* Notification re-enable handled by tx_complete */
1309 }
1310
1311 /* If we flush a full burst of packets, assume there are
1312 * more coming and immediately reschedule */
1313 if (ret >= n->tx_burst) {
1314 qemu_bh_schedule(q->tx_bh);
1315 q->tx_waiting = 1;
1316 return;
1317 }
1318
1319 /* If less than a full burst, re-enable notification and flush
1320 * anything that may have come in while we weren't looking. If
1321 * we find something, assume the guest is still active and reschedule */
1322 virtio_queue_set_notification(q->tx_vq, 1);
1323 if (virtio_net_flush_tx(q) > 0) {
1324 virtio_queue_set_notification(q->tx_vq, 0);
1325 qemu_bh_schedule(q->tx_bh);
1326 q->tx_waiting = 1;
1327 }
1328 }
1329
1330 static void virtio_net_add_queue(VirtIONet *n, int index)
1331 {
1332 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1333
1334 n->vqs[index].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx);
1335 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) {
1336 n->vqs[index].tx_vq =
1337 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer);
1338 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
1339 virtio_net_tx_timer,
1340 &n->vqs[index]);
1341 } else {
1342 n->vqs[index].tx_vq =
1343 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh);
1344 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]);
1345 }
1346
1347 n->vqs[index].tx_waiting = 0;
1348 n->vqs[index].n = n;
1349 }
1350
1351 static void virtio_net_del_queue(VirtIONet *n, int index)
1352 {
1353 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1354 VirtIONetQueue *q = &n->vqs[index];
1355 NetClientState *nc = qemu_get_subqueue(n->nic, index);
1356
1357 qemu_purge_queued_packets(nc);
1358
1359 virtio_del_queue(vdev, index * 2);
1360 if (q->tx_timer) {
1361 timer_del(q->tx_timer);
1362 timer_free(q->tx_timer);
1363 } else {
1364 qemu_bh_delete(q->tx_bh);
1365 }
1366 virtio_del_queue(vdev, index * 2 + 1);
1367 }
1368
1369 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues)
1370 {
1371 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1372 int old_num_queues = virtio_get_num_queues(vdev);
1373 int new_num_queues = new_max_queues * 2 + 1;
1374 int i;
1375
1376 assert(old_num_queues >= 3);
1377 assert(old_num_queues % 2 == 1);
1378
1379 if (old_num_queues == new_num_queues) {
1380 return;
1381 }
1382
1383 /*
1384 * We always need to remove and add ctrl vq if
1385 * old_num_queues != new_num_queues. Remove ctrl_vq first,
1386 * and then we only enter one of the following too loops.
1387 */
1388 virtio_del_queue(vdev, old_num_queues - 1);
1389
1390 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) {
1391 /* new_num_queues < old_num_queues */
1392 virtio_net_del_queue(n, i / 2);
1393 }
1394
1395 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) {
1396 /* new_num_queues > old_num_queues */
1397 virtio_net_add_queue(n, i / 2);
1398 }
1399
1400 /* add ctrl_vq last */
1401 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
1402 }
1403
1404 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue)
1405 {
1406 int max = multiqueue ? n->max_queues : 1;
1407
1408 n->multiqueue = multiqueue;
1409 virtio_net_change_num_queues(n, max);
1410
1411 virtio_net_set_queues(n);
1412 }
1413
1414 static void virtio_net_save(QEMUFile *f, void *opaque)
1415 {
1416 VirtIONet *n = opaque;
1417 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1418
1419 /* At this point, backend must be stopped, otherwise
1420 * it might keep writing to memory. */
1421 assert(!n->vhost_started);
1422 virtio_save(vdev, f);
1423 }
1424
1425 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f)
1426 {
1427 VirtIONet *n = VIRTIO_NET(vdev);
1428 int i;
1429
1430 qemu_put_buffer(f, n->mac, ETH_ALEN);
1431 qemu_put_be32(f, n->vqs[0].tx_waiting);
1432 qemu_put_be32(f, n->mergeable_rx_bufs);
1433 qemu_put_be16(f, n->status);
1434 qemu_put_byte(f, n->promisc);
1435 qemu_put_byte(f, n->allmulti);
1436 qemu_put_be32(f, n->mac_table.in_use);
1437 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN);
1438 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
1439 qemu_put_be32(f, n->has_vnet_hdr);
1440 qemu_put_byte(f, n->mac_table.multi_overflow);
1441 qemu_put_byte(f, n->mac_table.uni_overflow);
1442 qemu_put_byte(f, n->alluni);
1443 qemu_put_byte(f, n->nomulti);
1444 qemu_put_byte(f, n->nouni);
1445 qemu_put_byte(f, n->nobcast);
1446 qemu_put_byte(f, n->has_ufo);
1447 if (n->max_queues > 1) {
1448 qemu_put_be16(f, n->max_queues);
1449 qemu_put_be16(f, n->curr_queues);
1450 for (i = 1; i < n->curr_queues; i++) {
1451 qemu_put_be32(f, n->vqs[i].tx_waiting);
1452 }
1453 }
1454
1455 if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
1456 qemu_put_be64(f, n->curr_guest_offloads);
1457 }
1458 }
1459
1460 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
1461 {
1462 VirtIONet *n = opaque;
1463 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1464
1465 if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION)
1466 return -EINVAL;
1467
1468 return virtio_load(vdev, f, version_id);
1469 }
1470
1471 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f,
1472 int version_id)
1473 {
1474 VirtIONet *n = VIRTIO_NET(vdev);
1475 int i, link_down;
1476
1477 qemu_get_buffer(f, n->mac, ETH_ALEN);
1478 n->vqs[0].tx_waiting = qemu_get_be32(f);
1479
1480 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f),
1481 virtio_has_feature(vdev, VIRTIO_F_VERSION_1));
1482
1483 if (version_id >= 3)
1484 n->status = qemu_get_be16(f);
1485
1486 if (version_id >= 4) {
1487 if (version_id < 8) {
1488 n->promisc = qemu_get_be32(f);
1489 n->allmulti = qemu_get_be32(f);
1490 } else {
1491 n->promisc = qemu_get_byte(f);
1492 n->allmulti = qemu_get_byte(f);
1493 }
1494 }
1495
1496 if (version_id >= 5) {
1497 n->mac_table.in_use = qemu_get_be32(f);
1498 /* MAC_TABLE_ENTRIES may be different from the saved image */
1499 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
1500 qemu_get_buffer(f, n->mac_table.macs,
1501 n->mac_table.in_use * ETH_ALEN);
1502 } else {
1503 int64_t i;
1504
1505 /* Overflow detected - can happen if source has a larger MAC table.
1506 * We simply set overflow flag so there's no need to maintain the
1507 * table of addresses, discard them all.
1508 * Note: 64 bit math to avoid integer overflow.
1509 */
1510 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) {
1511 qemu_get_byte(f);
1512 }
1513 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
1514 n->mac_table.in_use = 0;
1515 }
1516 }
1517
1518 if (version_id >= 6)
1519 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
1520
1521 if (version_id >= 7) {
1522 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
1523 error_report("virtio-net: saved image requires vnet_hdr=on");
1524 return -1;
1525 }
1526 }
1527
1528 if (version_id >= 9) {
1529 n->mac_table.multi_overflow = qemu_get_byte(f);
1530 n->mac_table.uni_overflow = qemu_get_byte(f);
1531 }
1532
1533 if (version_id >= 10) {
1534 n->alluni = qemu_get_byte(f);
1535 n->nomulti = qemu_get_byte(f);
1536 n->nouni = qemu_get_byte(f);
1537 n->nobcast = qemu_get_byte(f);
1538 }
1539
1540 if (version_id >= 11) {
1541 if (qemu_get_byte(f) && !peer_has_ufo(n)) {
1542 error_report("virtio-net: saved image requires TUN_F_UFO support");
1543 return -1;
1544 }
1545 }
1546
1547 if (n->max_queues > 1) {
1548 if (n->max_queues != qemu_get_be16(f)) {
1549 error_report("virtio-net: different max_queues ");
1550 return -1;
1551 }
1552
1553 n->curr_queues = qemu_get_be16(f);
1554 if (n->curr_queues > n->max_queues) {
1555 error_report("virtio-net: curr_queues %x > max_queues %x",
1556 n->curr_queues, n->max_queues);
1557 return -1;
1558 }
1559 for (i = 1; i < n->curr_queues; i++) {
1560 n->vqs[i].tx_waiting = qemu_get_be32(f);
1561 }
1562 }
1563
1564 if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
1565 n->curr_guest_offloads = qemu_get_be64(f);
1566 } else {
1567 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n);
1568 }
1569
1570 if (peer_has_vnet_hdr(n)) {
1571 virtio_net_apply_guest_offloads(n);
1572 }
1573
1574 virtio_net_set_queues(n);
1575
1576 /* Find the first multicast entry in the saved MAC filter */
1577 for (i = 0; i < n->mac_table.in_use; i++) {
1578 if (n->mac_table.macs[i * ETH_ALEN] & 1) {
1579 break;
1580 }
1581 }
1582 n->mac_table.first_multi = i;
1583
1584 /* nc.link_down can't be migrated, so infer link_down according
1585 * to link status bit in n->status */
1586 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0;
1587 for (i = 0; i < n->max_queues; i++) {
1588 qemu_get_subqueue(n->nic, i)->link_down = link_down;
1589 }
1590
1591 if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) &&
1592 virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) {
1593 n->announce_counter = SELF_ANNOUNCE_ROUNDS;
1594 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL));
1595 }
1596
1597 return 0;
1598 }
1599
1600 static NetClientInfo net_virtio_info = {
1601 .type = NET_CLIENT_OPTIONS_KIND_NIC,
1602 .size = sizeof(NICState),
1603 .can_receive = virtio_net_can_receive,
1604 .receive = virtio_net_receive,
1605 .link_status_changed = virtio_net_set_link_status,
1606 .query_rx_filter = virtio_net_query_rxfilter,
1607 };
1608
1609 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx)
1610 {
1611 VirtIONet *n = VIRTIO_NET(vdev);
1612 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
1613 assert(n->vhost_started);
1614 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx);
1615 }
1616
1617 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx,
1618 bool mask)
1619 {
1620 VirtIONet *n = VIRTIO_NET(vdev);
1621 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
1622 assert(n->vhost_started);
1623 vhost_net_virtqueue_mask(get_vhost_net(nc->peer),
1624 vdev, idx, mask);
1625 }
1626
1627 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features)
1628 {
1629 int i, config_size = 0;
1630 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC);
1631 for (i = 0; feature_sizes[i].flags != 0; i++) {
1632 if (host_features & feature_sizes[i].flags) {
1633 config_size = MAX(feature_sizes[i].end, config_size);
1634 }
1635 }
1636 n->config_size = config_size;
1637 }
1638
1639 void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
1640 const char *type)
1641 {
1642 /*
1643 * The name can be NULL, the netclient name will be type.x.
1644 */
1645 assert(type != NULL);
1646
1647 g_free(n->netclient_name);
1648 g_free(n->netclient_type);
1649 n->netclient_name = g_strdup(name);
1650 n->netclient_type = g_strdup(type);
1651 }
1652
1653 static void virtio_net_device_realize(DeviceState *dev, Error **errp)
1654 {
1655 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1656 VirtIONet *n = VIRTIO_NET(dev);
1657 NetClientState *nc;
1658 int i;
1659
1660 virtio_net_set_config_size(n, n->host_features);
1661 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
1662
1663 n->max_queues = MAX(n->nic_conf.peers.queues, 1);
1664 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) {
1665 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
1666 "must be a positive integer less than %d.",
1667 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2);
1668 virtio_cleanup(vdev);
1669 return;
1670 }
1671 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues);
1672 n->curr_queues = 1;
1673 n->tx_timeout = n->net_conf.txtimer;
1674
1675 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer")
1676 && strcmp(n->net_conf.tx, "bh")) {
1677 error_report("virtio-net: "
1678 "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
1679 n->net_conf.tx);
1680 error_report("Defaulting to \"bh\"");
1681 }
1682
1683 for (i = 0; i < n->max_queues; i++) {
1684 virtio_net_add_queue(n, i);
1685 }
1686
1687 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
1688 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr);
1689 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac));
1690 n->status = VIRTIO_NET_S_LINK_UP;
1691 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
1692 virtio_net_announce_timer, n);
1693
1694 if (n->netclient_type) {
1695 /*
1696 * Happen when virtio_net_set_netclient_name has been called.
1697 */
1698 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf,
1699 n->netclient_type, n->netclient_name, n);
1700 } else {
1701 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf,
1702 object_get_typename(OBJECT(dev)), dev->id, n);
1703 }
1704
1705 peer_test_vnet_hdr(n);
1706 if (peer_has_vnet_hdr(n)) {
1707 for (i = 0; i < n->max_queues; i++) {
1708 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true);
1709 }
1710 n->host_hdr_len = sizeof(struct virtio_net_hdr);
1711 } else {
1712 n->host_hdr_len = 0;
1713 }
1714
1715 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a);
1716
1717 n->vqs[0].tx_waiting = 0;
1718 n->tx_burst = n->net_conf.txburst;
1719 virtio_net_set_mrg_rx_bufs(n, 0, 0);
1720 n->promisc = 1; /* for compatibility */
1721
1722 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);
1723
1724 n->vlans = g_malloc0(MAX_VLAN >> 3);
1725
1726 nc = qemu_get_queue(n->nic);
1727 nc->rxfilter_notify_enabled = 1;
1728
1729 n->qdev = dev;
1730 register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION,
1731 virtio_net_save, virtio_net_load, n);
1732 }
1733
1734 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp)
1735 {
1736 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1737 VirtIONet *n = VIRTIO_NET(dev);
1738 int i, max_queues;
1739
1740 /* This will stop vhost backend if appropriate. */
1741 virtio_net_set_status(vdev, 0);
1742
1743 unregister_savevm(dev, "virtio-net", n);
1744
1745 g_free(n->netclient_name);
1746 n->netclient_name = NULL;
1747 g_free(n->netclient_type);
1748 n->netclient_type = NULL;
1749
1750 g_free(n->mac_table.macs);
1751 g_free(n->vlans);
1752
1753 max_queues = n->multiqueue ? n->max_queues : 1;
1754 for (i = 0; i < max_queues; i++) {
1755 virtio_net_del_queue(n, i);
1756 }
1757
1758 timer_del(n->announce_timer);
1759 timer_free(n->announce_timer);
1760 g_free(n->vqs);
1761 qemu_del_nic(n->nic);
1762 virtio_cleanup(vdev);
1763 }
1764
1765 static void virtio_net_instance_init(Object *obj)
1766 {
1767 VirtIONet *n = VIRTIO_NET(obj);
1768
1769 /*
1770 * The default config_size is sizeof(struct virtio_net_config).
1771 * Can be overriden with virtio_net_set_config_size.
1772 */
1773 n->config_size = sizeof(struct virtio_net_config);
1774 device_add_bootindex_property(obj, &n->nic_conf.bootindex,
1775 "bootindex", "/ethernet-phy@0",
1776 DEVICE(n), NULL);
1777 }
1778
1779 static Property virtio_net_properties[] = {
1780 DEFINE_PROP_BIT("any_layout", VirtIONet, host_features,
1781 VIRTIO_F_ANY_LAYOUT, true),
1782 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true),
1783 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features,
1784 VIRTIO_NET_F_GUEST_CSUM, true),
1785 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true),
1786 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features,
1787 VIRTIO_NET_F_GUEST_TSO4, true),
1788 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features,
1789 VIRTIO_NET_F_GUEST_TSO6, true),
1790 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features,
1791 VIRTIO_NET_F_GUEST_ECN, true),
1792 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features,
1793 VIRTIO_NET_F_GUEST_UFO, true),
1794 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features,
1795 VIRTIO_NET_F_GUEST_ANNOUNCE, true),
1796 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features,
1797 VIRTIO_NET_F_HOST_TSO4, true),
1798 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features,
1799 VIRTIO_NET_F_HOST_TSO6, true),
1800 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features,
1801 VIRTIO_NET_F_HOST_ECN, true),
1802 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features,
1803 VIRTIO_NET_F_HOST_UFO, true),
1804 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features,
1805 VIRTIO_NET_F_MRG_RXBUF, true),
1806 DEFINE_PROP_BIT("status", VirtIONet, host_features,
1807 VIRTIO_NET_F_STATUS, true),
1808 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features,
1809 VIRTIO_NET_F_CTRL_VQ, true),
1810 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features,
1811 VIRTIO_NET_F_CTRL_RX, true),
1812 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features,
1813 VIRTIO_NET_F_CTRL_VLAN, true),
1814 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features,
1815 VIRTIO_NET_F_CTRL_RX_EXTRA, true),
1816 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features,
1817 VIRTIO_NET_F_CTRL_MAC_ADDR, true),
1818 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features,
1819 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true),
1820 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false),
1821 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf),
1822 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer,
1823 TX_TIMER_INTERVAL),
1824 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST),
1825 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx),
1826 DEFINE_PROP_END_OF_LIST(),
1827 };
1828
1829 static void virtio_net_class_init(ObjectClass *klass, void *data)
1830 {
1831 DeviceClass *dc = DEVICE_CLASS(klass);
1832 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1833
1834 dc->props = virtio_net_properties;
1835 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1836 vdc->realize = virtio_net_device_realize;
1837 vdc->unrealize = virtio_net_device_unrealize;
1838 vdc->get_config = virtio_net_get_config;
1839 vdc->set_config = virtio_net_set_config;
1840 vdc->get_features = virtio_net_get_features;
1841 vdc->set_features = virtio_net_set_features;
1842 vdc->bad_features = virtio_net_bad_features;
1843 vdc->reset = virtio_net_reset;
1844 vdc->set_status = virtio_net_set_status;
1845 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask;
1846 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending;
1847 vdc->load = virtio_net_load_device;
1848 vdc->save = virtio_net_save_device;
1849 }
1850
1851 static const TypeInfo virtio_net_info = {
1852 .name = TYPE_VIRTIO_NET,
1853 .parent = TYPE_VIRTIO_DEVICE,
1854 .instance_size = sizeof(VirtIONet),
1855 .instance_init = virtio_net_instance_init,
1856 .class_init = virtio_net_class_init,
1857 };
1858
1859 static void virtio_register_types(void)
1860 {
1861 type_register_static(&virtio_net_info);
1862 }
1863
1864 type_init(virtio_register_types)