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14#include "qemu/osdep.h"
15#include "qemu/iov.h"
16#include "hw/virtio/virtio.h"
17#include "net/net.h"
18#include "net/checksum.h"
19#include "net/tap.h"
20#include "qemu/error-report.h"
21#include "qemu/timer.h"
22#include "hw/virtio/virtio-net.h"
23#include "net/vhost_net.h"
24#include "hw/virtio/virtio-bus.h"
25#include "qapi/qmp/qjson.h"
26#include "qapi-event.h"
27#include "hw/virtio/virtio-access.h"
28
29#define VIRTIO_NET_VM_VERSION 11
30
31#define MAC_TABLE_ENTRIES 64
32#define MAX_VLAN (1 << 12)
33
34
35#define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256
36
37#define VIRTIO_NET_RX_QUEUE_MIN_SIZE VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE
38
39
40
41
42
43#define endof(container, field) \
44 (offsetof(container, field) + sizeof(((container *)0)->field))
45
46typedef struct VirtIOFeature {
47 uint32_t flags;
48 size_t end;
49} VirtIOFeature;
50
51static VirtIOFeature feature_sizes[] = {
52 {.flags = 1 << VIRTIO_NET_F_MAC,
53 .end = endof(struct virtio_net_config, mac)},
54 {.flags = 1 << VIRTIO_NET_F_STATUS,
55 .end = endof(struct virtio_net_config, status)},
56 {.flags = 1 << VIRTIO_NET_F_MQ,
57 .end = endof(struct virtio_net_config, max_virtqueue_pairs)},
58 {}
59};
60
61static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc)
62{
63 VirtIONet *n = qemu_get_nic_opaque(nc);
64
65 return &n->vqs[nc->queue_index];
66}
67
68static int vq2q(int queue_index)
69{
70 return queue_index / 2;
71}
72
73
74
75
76
77static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
78{
79 VirtIONet *n = VIRTIO_NET(vdev);
80 struct virtio_net_config netcfg;
81
82 virtio_stw_p(vdev, &netcfg.status, n->status);
83 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues);
84 memcpy(netcfg.mac, n->mac, ETH_ALEN);
85 memcpy(config, &netcfg, n->config_size);
86}
87
88static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config)
89{
90 VirtIONet *n = VIRTIO_NET(vdev);
91 struct virtio_net_config netcfg = {};
92
93 memcpy(&netcfg, config, n->config_size);
94
95 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) &&
96 !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) &&
97 memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
98 memcpy(n->mac, netcfg.mac, ETH_ALEN);
99 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
100 }
101}
102
103static bool virtio_net_started(VirtIONet *n, uint8_t status)
104{
105 VirtIODevice *vdev = VIRTIO_DEVICE(n);
106 return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
107 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running;
108}
109
110static void virtio_net_announce_timer(void *opaque)
111{
112 VirtIONet *n = opaque;
113 VirtIODevice *vdev = VIRTIO_DEVICE(n);
114
115 n->announce_counter--;
116 n->status |= VIRTIO_NET_S_ANNOUNCE;
117 virtio_notify_config(vdev);
118}
119
120static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
121{
122 VirtIODevice *vdev = VIRTIO_DEVICE(n);
123 NetClientState *nc = qemu_get_queue(n->nic);
124 int queues = n->multiqueue ? n->max_queues : 1;
125
126 if (!get_vhost_net(nc->peer)) {
127 return;
128 }
129
130 if ((virtio_net_started(n, status) && !nc->peer->link_down) ==
131 !!n->vhost_started) {
132 return;
133 }
134 if (!n->vhost_started) {
135 int r, i;
136
137 if (n->needs_vnet_hdr_swap) {
138 error_report("backend does not support %s vnet headers; "
139 "falling back on userspace virtio",
140 virtio_is_big_endian(vdev) ? "BE" : "LE");
141 return;
142 }
143
144
145
146
147 for (i = 0; i < queues; i++) {
148 NetClientState *qnc = qemu_get_subqueue(n->nic, i);
149
150
151 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc);
152 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer);
153 }
154
155 n->vhost_started = 1;
156 r = vhost_net_start(vdev, n->nic->ncs, queues);
157 if (r < 0) {
158 error_report("unable to start vhost net: %d: "
159 "falling back on userspace virtio", -r);
160 n->vhost_started = 0;
161 }
162 } else {
163 vhost_net_stop(vdev, n->nic->ncs, queues);
164 n->vhost_started = 0;
165 }
166}
167
168static int virtio_net_set_vnet_endian_one(VirtIODevice *vdev,
169 NetClientState *peer,
170 bool enable)
171{
172 if (virtio_is_big_endian(vdev)) {
173 return qemu_set_vnet_be(peer, enable);
174 } else {
175 return qemu_set_vnet_le(peer, enable);
176 }
177}
178
179static bool virtio_net_set_vnet_endian(VirtIODevice *vdev, NetClientState *ncs,
180 int queues, bool enable)
181{
182 int i;
183
184 for (i = 0; i < queues; i++) {
185 if (virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, enable) < 0 &&
186 enable) {
187 while (--i >= 0) {
188 virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, false);
189 }
190
191 return true;
192 }
193 }
194
195 return false;
196}
197
198static void virtio_net_vnet_endian_status(VirtIONet *n, uint8_t status)
199{
200 VirtIODevice *vdev = VIRTIO_DEVICE(n);
201 int queues = n->multiqueue ? n->max_queues : 1;
202
203 if (virtio_net_started(n, status)) {
204
205
206
207
208
209 n->needs_vnet_hdr_swap = virtio_net_set_vnet_endian(vdev, n->nic->ncs,
210 queues, true);
211 } else if (virtio_net_started(n, vdev->status)) {
212
213
214
215
216
217 virtio_net_set_vnet_endian(vdev, n->nic->ncs, queues, false);
218 }
219}
220
221static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status)
222{
223 VirtIONet *n = VIRTIO_NET(vdev);
224 VirtIONetQueue *q;
225 int i;
226 uint8_t queue_status;
227
228 virtio_net_vnet_endian_status(n, status);
229 virtio_net_vhost_status(n, status);
230
231 for (i = 0; i < n->max_queues; i++) {
232 NetClientState *ncs = qemu_get_subqueue(n->nic, i);
233 bool queue_started;
234 q = &n->vqs[i];
235
236 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) {
237 queue_status = 0;
238 } else {
239 queue_status = status;
240 }
241 queue_started =
242 virtio_net_started(n, queue_status) && !n->vhost_started;
243
244 if (queue_started) {
245 qemu_flush_queued_packets(ncs);
246 }
247
248 if (!q->tx_waiting) {
249 continue;
250 }
251
252 if (queue_started) {
253 if (q->tx_timer) {
254 timer_mod(q->tx_timer,
255 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout);
256 } else {
257 qemu_bh_schedule(q->tx_bh);
258 }
259 } else {
260 if (q->tx_timer) {
261 timer_del(q->tx_timer);
262 } else {
263 qemu_bh_cancel(q->tx_bh);
264 }
265 }
266 }
267}
268
269static void virtio_net_set_link_status(NetClientState *nc)
270{
271 VirtIONet *n = qemu_get_nic_opaque(nc);
272 VirtIODevice *vdev = VIRTIO_DEVICE(n);
273 uint16_t old_status = n->status;
274
275 if (nc->link_down)
276 n->status &= ~VIRTIO_NET_S_LINK_UP;
277 else
278 n->status |= VIRTIO_NET_S_LINK_UP;
279
280 if (n->status != old_status)
281 virtio_notify_config(vdev);
282
283 virtio_net_set_status(vdev, vdev->status);
284}
285
286static void rxfilter_notify(NetClientState *nc)
287{
288 VirtIONet *n = qemu_get_nic_opaque(nc);
289
290 if (nc->rxfilter_notify_enabled) {
291 gchar *path = object_get_canonical_path(OBJECT(n->qdev));
292 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name,
293 n->netclient_name, path, &error_abort);
294 g_free(path);
295
296
297 nc->rxfilter_notify_enabled = 0;
298 }
299}
300
301static intList *get_vlan_table(VirtIONet *n)
302{
303 intList *list, *entry;
304 int i, j;
305
306 list = NULL;
307 for (i = 0; i < MAX_VLAN >> 5; i++) {
308 for (j = 0; n->vlans[i] && j <= 0x1f; j++) {
309 if (n->vlans[i] & (1U << j)) {
310 entry = g_malloc0(sizeof(*entry));
311 entry->value = (i << 5) + j;
312 entry->next = list;
313 list = entry;
314 }
315 }
316 }
317
318 return list;
319}
320
321static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc)
322{
323 VirtIONet *n = qemu_get_nic_opaque(nc);
324 VirtIODevice *vdev = VIRTIO_DEVICE(n);
325 RxFilterInfo *info;
326 strList *str_list, *entry;
327 int i;
328
329 info = g_malloc0(sizeof(*info));
330 info->name = g_strdup(nc->name);
331 info->promiscuous = n->promisc;
332
333 if (n->nouni) {
334 info->unicast = RX_STATE_NONE;
335 } else if (n->alluni) {
336 info->unicast = RX_STATE_ALL;
337 } else {
338 info->unicast = RX_STATE_NORMAL;
339 }
340
341 if (n->nomulti) {
342 info->multicast = RX_STATE_NONE;
343 } else if (n->allmulti) {
344 info->multicast = RX_STATE_ALL;
345 } else {
346 info->multicast = RX_STATE_NORMAL;
347 }
348
349 info->broadcast_allowed = n->nobcast;
350 info->multicast_overflow = n->mac_table.multi_overflow;
351 info->unicast_overflow = n->mac_table.uni_overflow;
352
353 info->main_mac = qemu_mac_strdup_printf(n->mac);
354
355 str_list = NULL;
356 for (i = 0; i < n->mac_table.first_multi; i++) {
357 entry = g_malloc0(sizeof(*entry));
358 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN);
359 entry->next = str_list;
360 str_list = entry;
361 }
362 info->unicast_table = str_list;
363
364 str_list = NULL;
365 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
366 entry = g_malloc0(sizeof(*entry));
367 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN);
368 entry->next = str_list;
369 str_list = entry;
370 }
371 info->multicast_table = str_list;
372 info->vlan_table = get_vlan_table(n);
373
374 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) {
375 info->vlan = RX_STATE_ALL;
376 } else if (!info->vlan_table) {
377 info->vlan = RX_STATE_NONE;
378 } else {
379 info->vlan = RX_STATE_NORMAL;
380 }
381
382
383 nc->rxfilter_notify_enabled = 1;
384
385 return info;
386}
387
388static void virtio_net_reset(VirtIODevice *vdev)
389{
390 VirtIONet *n = VIRTIO_NET(vdev);
391
392
393 n->promisc = 1;
394 n->allmulti = 0;
395 n->alluni = 0;
396 n->nomulti = 0;
397 n->nouni = 0;
398 n->nobcast = 0;
399
400 n->curr_queues = 1;
401 timer_del(n->announce_timer);
402 n->announce_counter = 0;
403 n->status &= ~VIRTIO_NET_S_ANNOUNCE;
404
405
406 n->mac_table.in_use = 0;
407 n->mac_table.first_multi = 0;
408 n->mac_table.multi_overflow = 0;
409 n->mac_table.uni_overflow = 0;
410 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
411 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac));
412 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
413 memset(n->vlans, 0, MAX_VLAN >> 3);
414}
415
416static void peer_test_vnet_hdr(VirtIONet *n)
417{
418 NetClientState *nc = qemu_get_queue(n->nic);
419 if (!nc->peer) {
420 return;
421 }
422
423 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer);
424}
425
426static int peer_has_vnet_hdr(VirtIONet *n)
427{
428 return n->has_vnet_hdr;
429}
430
431static int peer_has_ufo(VirtIONet *n)
432{
433 if (!peer_has_vnet_hdr(n))
434 return 0;
435
436 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer);
437
438 return n->has_ufo;
439}
440
441static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs,
442 int version_1)
443{
444 int i;
445 NetClientState *nc;
446
447 n->mergeable_rx_bufs = mergeable_rx_bufs;
448
449 if (version_1) {
450 n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
451 } else {
452 n->guest_hdr_len = n->mergeable_rx_bufs ?
453 sizeof(struct virtio_net_hdr_mrg_rxbuf) :
454 sizeof(struct virtio_net_hdr);
455 }
456
457 for (i = 0; i < n->max_queues; i++) {
458 nc = qemu_get_subqueue(n->nic, i);
459
460 if (peer_has_vnet_hdr(n) &&
461 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) {
462 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len);
463 n->host_hdr_len = n->guest_hdr_len;
464 }
465 }
466}
467
468static int peer_attach(VirtIONet *n, int index)
469{
470 NetClientState *nc = qemu_get_subqueue(n->nic, index);
471
472 if (!nc->peer) {
473 return 0;
474 }
475
476 if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
477 vhost_set_vring_enable(nc->peer, 1);
478 }
479
480 if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) {
481 return 0;
482 }
483
484 return tap_enable(nc->peer);
485}
486
487static int peer_detach(VirtIONet *n, int index)
488{
489 NetClientState *nc = qemu_get_subqueue(n->nic, index);
490
491 if (!nc->peer) {
492 return 0;
493 }
494
495 if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
496 vhost_set_vring_enable(nc->peer, 0);
497 }
498
499 if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) {
500 return 0;
501 }
502
503 return tap_disable(nc->peer);
504}
505
506static void virtio_net_set_queues(VirtIONet *n)
507{
508 int i;
509 int r;
510
511 if (n->nic->peer_deleted) {
512 return;
513 }
514
515 for (i = 0; i < n->max_queues; i++) {
516 if (i < n->curr_queues) {
517 r = peer_attach(n, i);
518 assert(!r);
519 } else {
520 r = peer_detach(n, i);
521 assert(!r);
522 }
523 }
524}
525
526static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue);
527
528static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features,
529 Error **errp)
530{
531 VirtIONet *n = VIRTIO_NET(vdev);
532 NetClientState *nc = qemu_get_queue(n->nic);
533
534
535 features |= n->host_features;
536
537 virtio_add_feature(&features, VIRTIO_NET_F_MAC);
538
539 if (!peer_has_vnet_hdr(n)) {
540 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM);
541 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4);
542 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6);
543 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN);
544
545 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM);
546 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4);
547 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6);
548 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN);
549 }
550
551 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
552 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO);
553 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO);
554 }
555
556 if (!get_vhost_net(nc->peer)) {
557 return features;
558 }
559 return vhost_net_get_features(get_vhost_net(nc->peer), features);
560}
561
562static uint64_t virtio_net_bad_features(VirtIODevice *vdev)
563{
564 uint64_t features = 0;
565
566
567
568 virtio_add_feature(&features, VIRTIO_NET_F_MAC);
569 virtio_add_feature(&features, VIRTIO_NET_F_CSUM);
570 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4);
571 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6);
572 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN);
573
574 return features;
575}
576
577static void virtio_net_apply_guest_offloads(VirtIONet *n)
578{
579 qemu_set_offload(qemu_get_queue(n->nic)->peer,
580 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)),
581 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)),
582 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)),
583 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)),
584 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO)));
585}
586
587static uint64_t virtio_net_guest_offloads_by_features(uint32_t features)
588{
589 static const uint64_t guest_offloads_mask =
590 (1ULL << VIRTIO_NET_F_GUEST_CSUM) |
591 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
592 (1ULL << VIRTIO_NET_F_GUEST_TSO6) |
593 (1ULL << VIRTIO_NET_F_GUEST_ECN) |
594 (1ULL << VIRTIO_NET_F_GUEST_UFO);
595
596 return guest_offloads_mask & features;
597}
598
599static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n)
600{
601 VirtIODevice *vdev = VIRTIO_DEVICE(n);
602 return virtio_net_guest_offloads_by_features(vdev->guest_features);
603}
604
605static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
606{
607 VirtIONet *n = VIRTIO_NET(vdev);
608 int i;
609
610 virtio_net_set_multiqueue(n,
611 virtio_has_feature(features, VIRTIO_NET_F_MQ));
612
613 virtio_net_set_mrg_rx_bufs(n,
614 virtio_has_feature(features,
615 VIRTIO_NET_F_MRG_RXBUF),
616 virtio_has_feature(features,
617 VIRTIO_F_VERSION_1));
618
619 if (n->has_vnet_hdr) {
620 n->curr_guest_offloads =
621 virtio_net_guest_offloads_by_features(features);
622 virtio_net_apply_guest_offloads(n);
623 }
624
625 for (i = 0; i < n->max_queues; i++) {
626 NetClientState *nc = qemu_get_subqueue(n->nic, i);
627
628 if (!get_vhost_net(nc->peer)) {
629 continue;
630 }
631 vhost_net_ack_features(get_vhost_net(nc->peer), features);
632 }
633
634 if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) {
635 memset(n->vlans, 0, MAX_VLAN >> 3);
636 } else {
637 memset(n->vlans, 0xff, MAX_VLAN >> 3);
638 }
639}
640
641static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
642 struct iovec *iov, unsigned int iov_cnt)
643{
644 uint8_t on;
645 size_t s;
646 NetClientState *nc = qemu_get_queue(n->nic);
647
648 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on));
649 if (s != sizeof(on)) {
650 return VIRTIO_NET_ERR;
651 }
652
653 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) {
654 n->promisc = on;
655 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) {
656 n->allmulti = on;
657 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) {
658 n->alluni = on;
659 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) {
660 n->nomulti = on;
661 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) {
662 n->nouni = on;
663 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) {
664 n->nobcast = on;
665 } else {
666 return VIRTIO_NET_ERR;
667 }
668
669 rxfilter_notify(nc);
670
671 return VIRTIO_NET_OK;
672}
673
674static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd,
675 struct iovec *iov, unsigned int iov_cnt)
676{
677 VirtIODevice *vdev = VIRTIO_DEVICE(n);
678 uint64_t offloads;
679 size_t s;
680
681 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
682 return VIRTIO_NET_ERR;
683 }
684
685 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads));
686 if (s != sizeof(offloads)) {
687 return VIRTIO_NET_ERR;
688 }
689
690 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) {
691 uint64_t supported_offloads;
692
693 if (!n->has_vnet_hdr) {
694 return VIRTIO_NET_ERR;
695 }
696
697 supported_offloads = virtio_net_supported_guest_offloads(n);
698 if (offloads & ~supported_offloads) {
699 return VIRTIO_NET_ERR;
700 }
701
702 n->curr_guest_offloads = offloads;
703 virtio_net_apply_guest_offloads(n);
704
705 return VIRTIO_NET_OK;
706 } else {
707 return VIRTIO_NET_ERR;
708 }
709}
710
711static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
712 struct iovec *iov, unsigned int iov_cnt)
713{
714 VirtIODevice *vdev = VIRTIO_DEVICE(n);
715 struct virtio_net_ctrl_mac mac_data;
716 size_t s;
717 NetClientState *nc = qemu_get_queue(n->nic);
718
719 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) {
720 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) {
721 return VIRTIO_NET_ERR;
722 }
723 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac));
724 assert(s == sizeof(n->mac));
725 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
726 rxfilter_notify(nc);
727
728 return VIRTIO_NET_OK;
729 }
730
731 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) {
732 return VIRTIO_NET_ERR;
733 }
734
735 int in_use = 0;
736 int first_multi = 0;
737 uint8_t uni_overflow = 0;
738 uint8_t multi_overflow = 0;
739 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);
740
741 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
742 sizeof(mac_data.entries));
743 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries);
744 if (s != sizeof(mac_data.entries)) {
745 goto error;
746 }
747 iov_discard_front(&iov, &iov_cnt, s);
748
749 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) {
750 goto error;
751 }
752
753 if (mac_data.entries <= MAC_TABLE_ENTRIES) {
754 s = iov_to_buf(iov, iov_cnt, 0, macs,
755 mac_data.entries * ETH_ALEN);
756 if (s != mac_data.entries * ETH_ALEN) {
757 goto error;
758 }
759 in_use += mac_data.entries;
760 } else {
761 uni_overflow = 1;
762 }
763
764 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN);
765
766 first_multi = in_use;
767
768 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
769 sizeof(mac_data.entries));
770 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries);
771 if (s != sizeof(mac_data.entries)) {
772 goto error;
773 }
774
775 iov_discard_front(&iov, &iov_cnt, s);
776
777 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) {
778 goto error;
779 }
780
781 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) {
782 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN],
783 mac_data.entries * ETH_ALEN);
784 if (s != mac_data.entries * ETH_ALEN) {
785 goto error;
786 }
787 in_use += mac_data.entries;
788 } else {
789 multi_overflow = 1;
790 }
791
792 n->mac_table.in_use = in_use;
793 n->mac_table.first_multi = first_multi;
794 n->mac_table.uni_overflow = uni_overflow;
795 n->mac_table.multi_overflow = multi_overflow;
796 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN);
797 g_free(macs);
798 rxfilter_notify(nc);
799
800 return VIRTIO_NET_OK;
801
802error:
803 g_free(macs);
804 return VIRTIO_NET_ERR;
805}
806
807static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd,
808 struct iovec *iov, unsigned int iov_cnt)
809{
810 VirtIODevice *vdev = VIRTIO_DEVICE(n);
811 uint16_t vid;
812 size_t s;
813 NetClientState *nc = qemu_get_queue(n->nic);
814
815 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid));
816 vid = virtio_lduw_p(vdev, &vid);
817 if (s != sizeof(vid)) {
818 return VIRTIO_NET_ERR;
819 }
820
821 if (vid >= MAX_VLAN)
822 return VIRTIO_NET_ERR;
823
824 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
825 n->vlans[vid >> 5] |= (1U << (vid & 0x1f));
826 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL)
827 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f));
828 else
829 return VIRTIO_NET_ERR;
830
831 rxfilter_notify(nc);
832
833 return VIRTIO_NET_OK;
834}
835
836static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd,
837 struct iovec *iov, unsigned int iov_cnt)
838{
839 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK &&
840 n->status & VIRTIO_NET_S_ANNOUNCE) {
841 n->status &= ~VIRTIO_NET_S_ANNOUNCE;
842 if (n->announce_counter) {
843 timer_mod(n->announce_timer,
844 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
845 self_announce_delay(n->announce_counter));
846 }
847 return VIRTIO_NET_OK;
848 } else {
849 return VIRTIO_NET_ERR;
850 }
851}
852
853static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
854 struct iovec *iov, unsigned int iov_cnt)
855{
856 VirtIODevice *vdev = VIRTIO_DEVICE(n);
857 struct virtio_net_ctrl_mq mq;
858 size_t s;
859 uint16_t queues;
860
861 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq));
862 if (s != sizeof(mq)) {
863 return VIRTIO_NET_ERR;
864 }
865
866 if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
867 return VIRTIO_NET_ERR;
868 }
869
870 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs);
871
872 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
873 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX ||
874 queues > n->max_queues ||
875 !n->multiqueue) {
876 return VIRTIO_NET_ERR;
877 }
878
879 n->curr_queues = queues;
880
881
882 virtio_net_set_status(vdev, vdev->status);
883 virtio_net_set_queues(n);
884
885 return VIRTIO_NET_OK;
886}
887
888static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
889{
890 VirtIONet *n = VIRTIO_NET(vdev);
891 struct virtio_net_ctrl_hdr ctrl;
892 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
893 VirtQueueElement *elem;
894 size_t s;
895 struct iovec *iov, *iov2;
896 unsigned int iov_cnt;
897
898 for (;;) {
899 elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
900 if (!elem) {
901 break;
902 }
903 if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) ||
904 iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) {
905 virtio_error(vdev, "virtio-net ctrl missing headers");
906 virtqueue_detach_element(vq, elem, 0);
907 g_free(elem);
908 break;
909 }
910
911 iov_cnt = elem->out_num;
912 iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num);
913 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl));
914 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl));
915 if (s != sizeof(ctrl)) {
916 status = VIRTIO_NET_ERR;
917 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) {
918 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt);
919 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) {
920 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt);
921 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) {
922 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt);
923 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) {
924 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt);
925 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) {
926 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt);
927 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) {
928 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt);
929 }
930
931 s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status));
932 assert(s == sizeof(status));
933
934 virtqueue_push(vq, elem, sizeof(status));
935 virtio_notify(vdev, vq);
936 g_free(iov2);
937 g_free(elem);
938 }
939}
940
941
942
943static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq)
944{
945 VirtIONet *n = VIRTIO_NET(vdev);
946 int queue_index = vq2q(virtio_get_queue_index(vq));
947
948 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index));
949}
950
951static int virtio_net_can_receive(NetClientState *nc)
952{
953 VirtIONet *n = qemu_get_nic_opaque(nc);
954 VirtIODevice *vdev = VIRTIO_DEVICE(n);
955 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
956
957 if (!vdev->vm_running) {
958 return 0;
959 }
960
961 if (nc->queue_index >= n->curr_queues) {
962 return 0;
963 }
964
965 if (!virtio_queue_ready(q->rx_vq) ||
966 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
967 return 0;
968 }
969
970 return 1;
971}
972
973static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize)
974{
975 VirtIONet *n = q->n;
976 if (virtio_queue_empty(q->rx_vq) ||
977 (n->mergeable_rx_bufs &&
978 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
979 virtio_queue_set_notification(q->rx_vq, 1);
980
981
982
983
984
985 if (virtio_queue_empty(q->rx_vq) ||
986 (n->mergeable_rx_bufs &&
987 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
988 return 0;
989 }
990 }
991
992 virtio_queue_set_notification(q->rx_vq, 0);
993 return 1;
994}
995
996static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr)
997{
998 virtio_tswap16s(vdev, &hdr->hdr_len);
999 virtio_tswap16s(vdev, &hdr->gso_size);
1000 virtio_tswap16s(vdev, &hdr->csum_start);
1001 virtio_tswap16s(vdev, &hdr->csum_offset);
1002}
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018static void work_around_broken_dhclient(struct virtio_net_hdr *hdr,
1019 uint8_t *buf, size_t size)
1020{
1021 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
1022 (size > 27 && size < 1500) &&
1023 (buf[12] == 0x08 && buf[13] == 0x00) &&
1024 (buf[23] == 17) &&
1025 (buf[34] == 0 && buf[35] == 67)) {
1026 net_checksum_calculate(buf, size);
1027 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM;
1028 }
1029}
1030
1031static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt,
1032 const void *buf, size_t size)
1033{
1034 if (n->has_vnet_hdr) {
1035
1036 void *wbuf = (void *)buf;
1037 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len,
1038 size - n->host_hdr_len);
1039
1040 if (n->needs_vnet_hdr_swap) {
1041 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf);
1042 }
1043 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr));
1044 } else {
1045 struct virtio_net_hdr hdr = {
1046 .flags = 0,
1047 .gso_type = VIRTIO_NET_HDR_GSO_NONE
1048 };
1049 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr);
1050 }
1051}
1052
1053static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
1054{
1055 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1056 static const uint8_t vlan[] = {0x81, 0x00};
1057 uint8_t *ptr = (uint8_t *)buf;
1058 int i;
1059
1060 if (n->promisc)
1061 return 1;
1062
1063 ptr += n->host_hdr_len;
1064
1065 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) {
1066 int vid = lduw_be_p(ptr + 14) & 0xfff;
1067 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f))))
1068 return 0;
1069 }
1070
1071 if (ptr[0] & 1) {
1072 if (!memcmp(ptr, bcast, sizeof(bcast))) {
1073 return !n->nobcast;
1074 } else if (n->nomulti) {
1075 return 0;
1076 } else if (n->allmulti || n->mac_table.multi_overflow) {
1077 return 1;
1078 }
1079
1080 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
1081 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
1082 return 1;
1083 }
1084 }
1085 } else {
1086 if (n->nouni) {
1087 return 0;
1088 } else if (n->alluni || n->mac_table.uni_overflow) {
1089 return 1;
1090 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) {
1091 return 1;
1092 }
1093
1094 for (i = 0; i < n->mac_table.first_multi; i++) {
1095 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
1096 return 1;
1097 }
1098 }
1099 }
1100
1101 return 0;
1102}
1103
1104static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size)
1105{
1106 VirtIONet *n = qemu_get_nic_opaque(nc);
1107 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
1108 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1109 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE];
1110 struct virtio_net_hdr_mrg_rxbuf mhdr;
1111 unsigned mhdr_cnt = 0;
1112 size_t offset, i, guest_offset;
1113
1114 if (!virtio_net_can_receive(nc)) {
1115 return -1;
1116 }
1117
1118
1119 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) {
1120 return 0;
1121 }
1122
1123 if (!receive_filter(n, buf, size))
1124 return size;
1125
1126 offset = i = 0;
1127
1128 while (offset < size) {
1129 VirtQueueElement *elem;
1130 int len, total;
1131 const struct iovec *sg;
1132
1133 total = 0;
1134
1135 elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement));
1136 if (!elem) {
1137 if (i) {
1138 virtio_error(vdev, "virtio-net unexpected empty queue: "
1139 "i %zd mergeable %d offset %zd, size %zd, "
1140 "guest hdr len %zd, host hdr len %zd "
1141 "guest features 0x%" PRIx64,
1142 i, n->mergeable_rx_bufs, offset, size,
1143 n->guest_hdr_len, n->host_hdr_len,
1144 vdev->guest_features);
1145 }
1146 return -1;
1147 }
1148
1149 if (elem->in_num < 1) {
1150 virtio_error(vdev,
1151 "virtio-net receive queue contains no in buffers");
1152 virtqueue_detach_element(q->rx_vq, elem, 0);
1153 g_free(elem);
1154 return -1;
1155 }
1156
1157 sg = elem->in_sg;
1158 if (i == 0) {
1159 assert(offset == 0);
1160 if (n->mergeable_rx_bufs) {
1161 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg),
1162 sg, elem->in_num,
1163 offsetof(typeof(mhdr), num_buffers),
1164 sizeof(mhdr.num_buffers));
1165 }
1166
1167 receive_header(n, sg, elem->in_num, buf, size);
1168 offset = n->host_hdr_len;
1169 total += n->guest_hdr_len;
1170 guest_offset = n->guest_hdr_len;
1171 } else {
1172 guest_offset = 0;
1173 }
1174
1175
1176 len = iov_from_buf(sg, elem->in_num, guest_offset,
1177 buf + offset, size - offset);
1178 total += len;
1179 offset += len;
1180
1181
1182
1183 if (!n->mergeable_rx_bufs && offset < size) {
1184 virtqueue_unpop(q->rx_vq, elem, total);
1185 g_free(elem);
1186 return size;
1187 }
1188
1189
1190 virtqueue_fill(q->rx_vq, elem, total, i++);
1191 g_free(elem);
1192 }
1193
1194 if (mhdr_cnt) {
1195 virtio_stw_p(vdev, &mhdr.num_buffers, i);
1196 iov_from_buf(mhdr_sg, mhdr_cnt,
1197 0,
1198 &mhdr.num_buffers, sizeof mhdr.num_buffers);
1199 }
1200
1201 virtqueue_flush(q->rx_vq, i);
1202 virtio_notify(vdev, q->rx_vq);
1203
1204 return size;
1205}
1206
1207static int32_t virtio_net_flush_tx(VirtIONetQueue *q);
1208
1209static void virtio_net_tx_complete(NetClientState *nc, ssize_t len)
1210{
1211 VirtIONet *n = qemu_get_nic_opaque(nc);
1212 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
1213 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1214
1215 virtqueue_push(q->tx_vq, q->async_tx.elem, 0);
1216 virtio_notify(vdev, q->tx_vq);
1217
1218 g_free(q->async_tx.elem);
1219 q->async_tx.elem = NULL;
1220
1221 virtio_queue_set_notification(q->tx_vq, 1);
1222 virtio_net_flush_tx(q);
1223}
1224
1225
1226static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
1227{
1228 VirtIONet *n = q->n;
1229 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1230 VirtQueueElement *elem;
1231 int32_t num_packets = 0;
1232 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
1233 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
1234 return num_packets;
1235 }
1236
1237 if (q->async_tx.elem) {
1238 virtio_queue_set_notification(q->tx_vq, 0);
1239 return num_packets;
1240 }
1241
1242 for (;;) {
1243 ssize_t ret;
1244 unsigned int out_num;
1245 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg;
1246 struct virtio_net_hdr_mrg_rxbuf mhdr;
1247
1248 elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement));
1249 if (!elem) {
1250 break;
1251 }
1252
1253 out_num = elem->out_num;
1254 out_sg = elem->out_sg;
1255 if (out_num < 1) {
1256 virtio_error(vdev, "virtio-net header not in first element");
1257 virtqueue_detach_element(q->tx_vq, elem, 0);
1258 g_free(elem);
1259 return -EINVAL;
1260 }
1261
1262 if (n->has_vnet_hdr) {
1263 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) <
1264 n->guest_hdr_len) {
1265 virtio_error(vdev, "virtio-net header incorrect");
1266 virtqueue_detach_element(q->tx_vq, elem, 0);
1267 g_free(elem);
1268 return -EINVAL;
1269 }
1270 if (n->needs_vnet_hdr_swap) {
1271 virtio_net_hdr_swap(vdev, (void *) &mhdr);
1272 sg2[0].iov_base = &mhdr;
1273 sg2[0].iov_len = n->guest_hdr_len;
1274 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1,
1275 out_sg, out_num,
1276 n->guest_hdr_len, -1);
1277 if (out_num == VIRTQUEUE_MAX_SIZE) {
1278 goto drop;
1279 }
1280 out_num += 1;
1281 out_sg = sg2;
1282 }
1283 }
1284
1285
1286
1287
1288
1289 assert(n->host_hdr_len <= n->guest_hdr_len);
1290 if (n->host_hdr_len != n->guest_hdr_len) {
1291 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg),
1292 out_sg, out_num,
1293 0, n->host_hdr_len);
1294 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num,
1295 out_sg, out_num,
1296 n->guest_hdr_len, -1);
1297 out_num = sg_num;
1298 out_sg = sg;
1299 }
1300
1301 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index),
1302 out_sg, out_num, virtio_net_tx_complete);
1303 if (ret == 0) {
1304 virtio_queue_set_notification(q->tx_vq, 0);
1305 q->async_tx.elem = elem;
1306 return -EBUSY;
1307 }
1308
1309drop:
1310 virtqueue_push(q->tx_vq, elem, 0);
1311 virtio_notify(vdev, q->tx_vq);
1312 g_free(elem);
1313
1314 if (++num_packets >= n->tx_burst) {
1315 break;
1316 }
1317 }
1318 return num_packets;
1319}
1320
1321static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq)
1322{
1323 VirtIONet *n = VIRTIO_NET(vdev);
1324 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))];
1325
1326
1327 if (!vdev->vm_running) {
1328 q->tx_waiting = 1;
1329 return;
1330 }
1331
1332 if (q->tx_waiting) {
1333 virtio_queue_set_notification(vq, 1);
1334 timer_del(q->tx_timer);
1335 q->tx_waiting = 0;
1336 if (virtio_net_flush_tx(q) == -EINVAL) {
1337 return;
1338 }
1339 } else {
1340 timer_mod(q->tx_timer,
1341 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout);
1342 q->tx_waiting = 1;
1343 virtio_queue_set_notification(vq, 0);
1344 }
1345}
1346
1347static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq)
1348{
1349 VirtIONet *n = VIRTIO_NET(vdev);
1350 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))];
1351
1352 if (unlikely(q->tx_waiting)) {
1353 return;
1354 }
1355 q->tx_waiting = 1;
1356
1357 if (!vdev->vm_running) {
1358 return;
1359 }
1360 virtio_queue_set_notification(vq, 0);
1361 qemu_bh_schedule(q->tx_bh);
1362}
1363
1364static void virtio_net_tx_timer(void *opaque)
1365{
1366 VirtIONetQueue *q = opaque;
1367 VirtIONet *n = q->n;
1368 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1369
1370 if (!vdev->vm_running) {
1371
1372 assert(q->tx_waiting);
1373 return;
1374 }
1375
1376 q->tx_waiting = 0;
1377
1378
1379 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
1380 return;
1381 }
1382
1383 virtio_queue_set_notification(q->tx_vq, 1);
1384 virtio_net_flush_tx(q);
1385}
1386
1387static void virtio_net_tx_bh(void *opaque)
1388{
1389 VirtIONetQueue *q = opaque;
1390 VirtIONet *n = q->n;
1391 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1392 int32_t ret;
1393
1394
1395 if (!vdev->vm_running) {
1396
1397 assert(q->tx_waiting);
1398 return;
1399 }
1400
1401 q->tx_waiting = 0;
1402
1403
1404 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) {
1405 return;
1406 }
1407
1408 ret = virtio_net_flush_tx(q);
1409 if (ret == -EBUSY || ret == -EINVAL) {
1410 return;
1411
1412 }
1413
1414
1415
1416 if (ret >= n->tx_burst) {
1417 qemu_bh_schedule(q->tx_bh);
1418 q->tx_waiting = 1;
1419 return;
1420 }
1421
1422
1423
1424
1425 virtio_queue_set_notification(q->tx_vq, 1);
1426 ret = virtio_net_flush_tx(q);
1427 if (ret == -EINVAL) {
1428 return;
1429 } else if (ret > 0) {
1430 virtio_queue_set_notification(q->tx_vq, 0);
1431 qemu_bh_schedule(q->tx_bh);
1432 q->tx_waiting = 1;
1433 }
1434}
1435
1436static void virtio_net_add_queue(VirtIONet *n, int index)
1437{
1438 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1439
1440 n->vqs[index].rx_vq = virtio_add_queue(vdev, n->net_conf.rx_queue_size,
1441 virtio_net_handle_rx);
1442 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) {
1443 n->vqs[index].tx_vq =
1444 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer);
1445 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
1446 virtio_net_tx_timer,
1447 &n->vqs[index]);
1448 } else {
1449 n->vqs[index].tx_vq =
1450 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh);
1451 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]);
1452 }
1453
1454 n->vqs[index].tx_waiting = 0;
1455 n->vqs[index].n = n;
1456}
1457
1458static void virtio_net_del_queue(VirtIONet *n, int index)
1459{
1460 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1461 VirtIONetQueue *q = &n->vqs[index];
1462 NetClientState *nc = qemu_get_subqueue(n->nic, index);
1463
1464 qemu_purge_queued_packets(nc);
1465
1466 virtio_del_queue(vdev, index * 2);
1467 if (q->tx_timer) {
1468 timer_del(q->tx_timer);
1469 timer_free(q->tx_timer);
1470 } else {
1471 qemu_bh_delete(q->tx_bh);
1472 }
1473 virtio_del_queue(vdev, index * 2 + 1);
1474}
1475
1476static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues)
1477{
1478 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1479 int old_num_queues = virtio_get_num_queues(vdev);
1480 int new_num_queues = new_max_queues * 2 + 1;
1481 int i;
1482
1483 assert(old_num_queues >= 3);
1484 assert(old_num_queues % 2 == 1);
1485
1486 if (old_num_queues == new_num_queues) {
1487 return;
1488 }
1489
1490
1491
1492
1493
1494
1495 virtio_del_queue(vdev, old_num_queues - 1);
1496
1497 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) {
1498
1499 virtio_net_del_queue(n, i / 2);
1500 }
1501
1502 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) {
1503
1504 virtio_net_add_queue(n, i / 2);
1505 }
1506
1507
1508 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
1509}
1510
1511static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue)
1512{
1513 int max = multiqueue ? n->max_queues : 1;
1514
1515 n->multiqueue = multiqueue;
1516 virtio_net_change_num_queues(n, max);
1517
1518 virtio_net_set_queues(n);
1519}
1520
1521static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f)
1522{
1523 VirtIONet *n = VIRTIO_NET(vdev);
1524 int i;
1525
1526 qemu_put_buffer(f, n->mac, ETH_ALEN);
1527 qemu_put_be32(f, n->vqs[0].tx_waiting);
1528 qemu_put_be32(f, n->mergeable_rx_bufs);
1529 qemu_put_be16(f, n->status);
1530 qemu_put_byte(f, n->promisc);
1531 qemu_put_byte(f, n->allmulti);
1532 qemu_put_be32(f, n->mac_table.in_use);
1533 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN);
1534 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
1535 qemu_put_be32(f, n->has_vnet_hdr);
1536 qemu_put_byte(f, n->mac_table.multi_overflow);
1537 qemu_put_byte(f, n->mac_table.uni_overflow);
1538 qemu_put_byte(f, n->alluni);
1539 qemu_put_byte(f, n->nomulti);
1540 qemu_put_byte(f, n->nouni);
1541 qemu_put_byte(f, n->nobcast);
1542 qemu_put_byte(f, n->has_ufo);
1543 if (n->max_queues > 1) {
1544 qemu_put_be16(f, n->max_queues);
1545 qemu_put_be16(f, n->curr_queues);
1546 for (i = 1; i < n->curr_queues; i++) {
1547 qemu_put_be32(f, n->vqs[i].tx_waiting);
1548 }
1549 }
1550
1551 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
1552 qemu_put_be64(f, n->curr_guest_offloads);
1553 }
1554}
1555
1556static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f,
1557 int version_id)
1558{
1559 VirtIONet *n = VIRTIO_NET(vdev);
1560 int i, link_down;
1561
1562 qemu_get_buffer(f, n->mac, ETH_ALEN);
1563 n->vqs[0].tx_waiting = qemu_get_be32(f);
1564
1565 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f),
1566 virtio_vdev_has_feature(vdev,
1567 VIRTIO_F_VERSION_1));
1568
1569 n->status = qemu_get_be16(f);
1570
1571 n->promisc = qemu_get_byte(f);
1572 n->allmulti = qemu_get_byte(f);
1573
1574 n->mac_table.in_use = qemu_get_be32(f);
1575
1576 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
1577 qemu_get_buffer(f, n->mac_table.macs,
1578 n->mac_table.in_use * ETH_ALEN);
1579 } else {
1580 int64_t i;
1581
1582
1583
1584
1585
1586
1587 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) {
1588 qemu_get_byte(f);
1589 }
1590 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
1591 n->mac_table.in_use = 0;
1592 }
1593
1594 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
1595
1596 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
1597 error_report("virtio-net: saved image requires vnet_hdr=on");
1598 return -1;
1599 }
1600
1601 n->mac_table.multi_overflow = qemu_get_byte(f);
1602 n->mac_table.uni_overflow = qemu_get_byte(f);
1603
1604 n->alluni = qemu_get_byte(f);
1605 n->nomulti = qemu_get_byte(f);
1606 n->nouni = qemu_get_byte(f);
1607 n->nobcast = qemu_get_byte(f);
1608
1609 if (qemu_get_byte(f) && !peer_has_ufo(n)) {
1610 error_report("virtio-net: saved image requires TUN_F_UFO support");
1611 return -1;
1612 }
1613
1614 if (n->max_queues > 1) {
1615 if (n->max_queues != qemu_get_be16(f)) {
1616 error_report("virtio-net: different max_queues ");
1617 return -1;
1618 }
1619
1620 n->curr_queues = qemu_get_be16(f);
1621 if (n->curr_queues > n->max_queues) {
1622 error_report("virtio-net: curr_queues %x > max_queues %x",
1623 n->curr_queues, n->max_queues);
1624 return -1;
1625 }
1626 for (i = 1; i < n->curr_queues; i++) {
1627 n->vqs[i].tx_waiting = qemu_get_be32(f);
1628 }
1629 }
1630
1631 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
1632 n->curr_guest_offloads = qemu_get_be64(f);
1633 } else {
1634 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n);
1635 }
1636
1637 if (peer_has_vnet_hdr(n)) {
1638 virtio_net_apply_guest_offloads(n);
1639 }
1640
1641 virtio_net_set_queues(n);
1642
1643
1644 for (i = 0; i < n->mac_table.in_use; i++) {
1645 if (n->mac_table.macs[i * ETH_ALEN] & 1) {
1646 break;
1647 }
1648 }
1649 n->mac_table.first_multi = i;
1650
1651
1652
1653 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0;
1654 for (i = 0; i < n->max_queues; i++) {
1655 qemu_get_subqueue(n->nic, i)->link_down = link_down;
1656 }
1657
1658 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) &&
1659 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) {
1660 n->announce_counter = SELF_ANNOUNCE_ROUNDS;
1661 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL));
1662 }
1663
1664 return 0;
1665}
1666
1667static NetClientInfo net_virtio_info = {
1668 .type = NET_CLIENT_DRIVER_NIC,
1669 .size = sizeof(NICState),
1670 .can_receive = virtio_net_can_receive,
1671 .receive = virtio_net_receive,
1672 .link_status_changed = virtio_net_set_link_status,
1673 .query_rx_filter = virtio_net_query_rxfilter,
1674};
1675
1676static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx)
1677{
1678 VirtIONet *n = VIRTIO_NET(vdev);
1679 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
1680 assert(n->vhost_started);
1681 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx);
1682}
1683
1684static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx,
1685 bool mask)
1686{
1687 VirtIONet *n = VIRTIO_NET(vdev);
1688 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
1689 assert(n->vhost_started);
1690 vhost_net_virtqueue_mask(get_vhost_net(nc->peer),
1691 vdev, idx, mask);
1692}
1693
1694static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features)
1695{
1696 int i, config_size = 0;
1697 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC);
1698 for (i = 0; feature_sizes[i].flags != 0; i++) {
1699 if (host_features & feature_sizes[i].flags) {
1700 config_size = MAX(feature_sizes[i].end, config_size);
1701 }
1702 }
1703 n->config_size = config_size;
1704}
1705
1706void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
1707 const char *type)
1708{
1709
1710
1711
1712 assert(type != NULL);
1713
1714 g_free(n->netclient_name);
1715 g_free(n->netclient_type);
1716 n->netclient_name = g_strdup(name);
1717 n->netclient_type = g_strdup(type);
1718}
1719
1720static void virtio_net_device_realize(DeviceState *dev, Error **errp)
1721{
1722 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1723 VirtIONet *n = VIRTIO_NET(dev);
1724 NetClientState *nc;
1725 int i;
1726
1727 virtio_net_set_config_size(n, n->host_features);
1728 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
1729
1730
1731
1732
1733
1734
1735 if (n->net_conf.rx_queue_size < VIRTIO_NET_RX_QUEUE_MIN_SIZE ||
1736 n->net_conf.rx_queue_size > VIRTQUEUE_MAX_SIZE ||
1737 (n->net_conf.rx_queue_size & (n->net_conf.rx_queue_size - 1))) {
1738 error_setg(errp, "Invalid rx_queue_size (= %" PRIu16 "), "
1739 "must be a power of 2 between %d and %d.",
1740 n->net_conf.rx_queue_size, VIRTIO_NET_RX_QUEUE_MIN_SIZE,
1741 VIRTQUEUE_MAX_SIZE);
1742 virtio_cleanup(vdev);
1743 return;
1744 }
1745
1746 n->max_queues = MAX(n->nic_conf.peers.queues, 1);
1747 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) {
1748 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
1749 "must be a positive integer less than %d.",
1750 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2);
1751 virtio_cleanup(vdev);
1752 return;
1753 }
1754 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues);
1755 n->curr_queues = 1;
1756 n->tx_timeout = n->net_conf.txtimer;
1757
1758 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer")
1759 && strcmp(n->net_conf.tx, "bh")) {
1760 error_report("virtio-net: "
1761 "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
1762 n->net_conf.tx);
1763 error_report("Defaulting to \"bh\"");
1764 }
1765
1766 for (i = 0; i < n->max_queues; i++) {
1767 virtio_net_add_queue(n, i);
1768 }
1769
1770 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
1771 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr);
1772 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac));
1773 n->status = VIRTIO_NET_S_LINK_UP;
1774 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
1775 virtio_net_announce_timer, n);
1776
1777 if (n->netclient_type) {
1778
1779
1780
1781 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf,
1782 n->netclient_type, n->netclient_name, n);
1783 } else {
1784 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf,
1785 object_get_typename(OBJECT(dev)), dev->id, n);
1786 }
1787
1788 peer_test_vnet_hdr(n);
1789 if (peer_has_vnet_hdr(n)) {
1790 for (i = 0; i < n->max_queues; i++) {
1791 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true);
1792 }
1793 n->host_hdr_len = sizeof(struct virtio_net_hdr);
1794 } else {
1795 n->host_hdr_len = 0;
1796 }
1797
1798 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a);
1799
1800 n->vqs[0].tx_waiting = 0;
1801 n->tx_burst = n->net_conf.txburst;
1802 virtio_net_set_mrg_rx_bufs(n, 0, 0);
1803 n->promisc = 1;
1804
1805 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);
1806
1807 n->vlans = g_malloc0(MAX_VLAN >> 3);
1808
1809 nc = qemu_get_queue(n->nic);
1810 nc->rxfilter_notify_enabled = 1;
1811
1812 n->qdev = dev;
1813}
1814
1815static void virtio_net_device_unrealize(DeviceState *dev, Error **errp)
1816{
1817 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1818 VirtIONet *n = VIRTIO_NET(dev);
1819 int i, max_queues;
1820
1821
1822 virtio_net_set_status(vdev, 0);
1823
1824 g_free(n->netclient_name);
1825 n->netclient_name = NULL;
1826 g_free(n->netclient_type);
1827 n->netclient_type = NULL;
1828
1829 g_free(n->mac_table.macs);
1830 g_free(n->vlans);
1831
1832 max_queues = n->multiqueue ? n->max_queues : 1;
1833 for (i = 0; i < max_queues; i++) {
1834 virtio_net_del_queue(n, i);
1835 }
1836
1837 timer_del(n->announce_timer);
1838 timer_free(n->announce_timer);
1839 g_free(n->vqs);
1840 qemu_del_nic(n->nic);
1841 virtio_cleanup(vdev);
1842}
1843
1844static void virtio_net_instance_init(Object *obj)
1845{
1846 VirtIONet *n = VIRTIO_NET(obj);
1847
1848
1849
1850
1851
1852 n->config_size = sizeof(struct virtio_net_config);
1853 device_add_bootindex_property(obj, &n->nic_conf.bootindex,
1854 "bootindex", "/ethernet-phy@0",
1855 DEVICE(n), NULL);
1856}
1857
1858static void virtio_net_pre_save(void *opaque)
1859{
1860 VirtIONet *n = opaque;
1861
1862
1863
1864 assert(!n->vhost_started);
1865}
1866
1867static const VMStateDescription vmstate_virtio_net = {
1868 .name = "virtio-net",
1869 .minimum_version_id = VIRTIO_NET_VM_VERSION,
1870 .version_id = VIRTIO_NET_VM_VERSION,
1871 .fields = (VMStateField[]) {
1872 VMSTATE_VIRTIO_DEVICE,
1873 VMSTATE_END_OF_LIST()
1874 },
1875 .pre_save = virtio_net_pre_save,
1876};
1877
1878static Property virtio_net_properties[] = {
1879 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true),
1880 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features,
1881 VIRTIO_NET_F_GUEST_CSUM, true),
1882 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true),
1883 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features,
1884 VIRTIO_NET_F_GUEST_TSO4, true),
1885 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features,
1886 VIRTIO_NET_F_GUEST_TSO6, true),
1887 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features,
1888 VIRTIO_NET_F_GUEST_ECN, true),
1889 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features,
1890 VIRTIO_NET_F_GUEST_UFO, true),
1891 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features,
1892 VIRTIO_NET_F_GUEST_ANNOUNCE, true),
1893 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features,
1894 VIRTIO_NET_F_HOST_TSO4, true),
1895 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features,
1896 VIRTIO_NET_F_HOST_TSO6, true),
1897 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features,
1898 VIRTIO_NET_F_HOST_ECN, true),
1899 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features,
1900 VIRTIO_NET_F_HOST_UFO, true),
1901 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features,
1902 VIRTIO_NET_F_MRG_RXBUF, true),
1903 DEFINE_PROP_BIT("status", VirtIONet, host_features,
1904 VIRTIO_NET_F_STATUS, true),
1905 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features,
1906 VIRTIO_NET_F_CTRL_VQ, true),
1907 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features,
1908 VIRTIO_NET_F_CTRL_RX, true),
1909 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features,
1910 VIRTIO_NET_F_CTRL_VLAN, true),
1911 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features,
1912 VIRTIO_NET_F_CTRL_RX_EXTRA, true),
1913 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features,
1914 VIRTIO_NET_F_CTRL_MAC_ADDR, true),
1915 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features,
1916 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true),
1917 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false),
1918 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf),
1919 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer,
1920 TX_TIMER_INTERVAL),
1921 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST),
1922 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx),
1923 DEFINE_PROP_UINT16("rx_queue_size", VirtIONet, net_conf.rx_queue_size,
1924 VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE),
1925 DEFINE_PROP_END_OF_LIST(),
1926};
1927
1928static void virtio_net_class_init(ObjectClass *klass, void *data)
1929{
1930 DeviceClass *dc = DEVICE_CLASS(klass);
1931 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1932
1933 dc->props = virtio_net_properties;
1934 dc->vmsd = &vmstate_virtio_net;
1935 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1936 vdc->realize = virtio_net_device_realize;
1937 vdc->unrealize = virtio_net_device_unrealize;
1938 vdc->get_config = virtio_net_get_config;
1939 vdc->set_config = virtio_net_set_config;
1940 vdc->get_features = virtio_net_get_features;
1941 vdc->set_features = virtio_net_set_features;
1942 vdc->bad_features = virtio_net_bad_features;
1943 vdc->reset = virtio_net_reset;
1944 vdc->set_status = virtio_net_set_status;
1945 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask;
1946 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending;
1947 vdc->load = virtio_net_load_device;
1948 vdc->save = virtio_net_save_device;
1949 vdc->legacy_features |= (0x1 << VIRTIO_NET_F_GSO);
1950}
1951
1952static const TypeInfo virtio_net_info = {
1953 .name = TYPE_VIRTIO_NET,
1954 .parent = TYPE_VIRTIO_DEVICE,
1955 .instance_size = sizeof(VirtIONet),
1956 .instance_init = virtio_net_instance_init,
1957 .class_init = virtio_net_class_init,
1958};
1959
1960static void virtio_register_types(void)
1961{
1962 type_register_static(&virtio_net_info);
1963}
1964
1965type_init(virtio_register_types)
1966