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14#include "qemu/osdep.h"
15#include "qemu/atomic.h"
16#include "qemu/iov.h"
17#include "qemu/main-loop.h"
18#include "qemu/module.h"
19#include "hw/virtio/virtio.h"
20#include "net/net.h"
21#include "net/checksum.h"
22#include "net/tap.h"
23#include "qemu/error-report.h"
24#include "qemu/timer.h"
25#include "qemu/option.h"
26#include "qemu/option_int.h"
27#include "qemu/config-file.h"
28#include "qapi/qmp/qdict.h"
29#include "hw/virtio/virtio-net.h"
30#include "net/vhost_net.h"
31#include "net/announce.h"
32#include "hw/virtio/virtio-bus.h"
33#include "qapi/error.h"
34#include "qapi/qapi-events-net.h"
35#include "hw/qdev-properties.h"
36#include "qapi/qapi-types-migration.h"
37#include "qapi/qapi-events-migration.h"
38#include "hw/virtio/virtio-access.h"
39#include "migration/misc.h"
40#include "standard-headers/linux/ethtool.h"
41#include "sysemu/sysemu.h"
42#include "trace.h"
43#include "monitor/qdev.h"
44#include "hw/pci/pci.h"
45#include "net_rx_pkt.h"
46#include "hw/virtio/vhost.h"
47
48#define VIRTIO_NET_VM_VERSION 11
49
50#define MAC_TABLE_ENTRIES 64
51#define MAX_VLAN (1 << 12)
52
53
54#define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256
55#define VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE 256
56
57
58#define VIRTIO_NET_RX_QUEUE_MIN_SIZE VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE
59#define VIRTIO_NET_TX_QUEUE_MIN_SIZE VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE
60
61#define VIRTIO_NET_IP4_ADDR_SIZE 8
62
63#define VIRTIO_NET_TCP_FLAG 0x3F
64#define VIRTIO_NET_TCP_HDR_LENGTH 0xF000
65
66
67#define VIRTIO_NET_MAX_IP4_PAYLOAD (65535 - sizeof(struct ip_header))
68#define VIRTIO_NET_MAX_TCP_PAYLOAD 65535
69
70
71#define VIRTIO_NET_IP4_HEADER_LENGTH 5
72
73#define VIRTIO_NET_IP6_ADDR_SIZE 32
74#define VIRTIO_NET_MAX_IP6_PAYLOAD VIRTIO_NET_MAX_TCP_PAYLOAD
75
76
77
78
79
80#define VIRTIO_NET_RSC_DEFAULT_INTERVAL 300000
81
82#define VIRTIO_NET_RSS_SUPPORTED_HASHES (VIRTIO_NET_RSS_HASH_TYPE_IPv4 | \
83 VIRTIO_NET_RSS_HASH_TYPE_TCPv4 | \
84 VIRTIO_NET_RSS_HASH_TYPE_UDPv4 | \
85 VIRTIO_NET_RSS_HASH_TYPE_IPv6 | \
86 VIRTIO_NET_RSS_HASH_TYPE_TCPv6 | \
87 VIRTIO_NET_RSS_HASH_TYPE_UDPv6 | \
88 VIRTIO_NET_RSS_HASH_TYPE_IP_EX | \
89 VIRTIO_NET_RSS_HASH_TYPE_TCP_EX | \
90 VIRTIO_NET_RSS_HASH_TYPE_UDP_EX)
91
92static VirtIOFeature feature_sizes[] = {
93 {.flags = 1ULL << VIRTIO_NET_F_MAC,
94 .end = endof(struct virtio_net_config, mac)},
95 {.flags = 1ULL << VIRTIO_NET_F_STATUS,
96 .end = endof(struct virtio_net_config, status)},
97 {.flags = 1ULL << VIRTIO_NET_F_MQ,
98 .end = endof(struct virtio_net_config, max_virtqueue_pairs)},
99 {.flags = 1ULL << VIRTIO_NET_F_MTU,
100 .end = endof(struct virtio_net_config, mtu)},
101 {.flags = 1ULL << VIRTIO_NET_F_SPEED_DUPLEX,
102 .end = endof(struct virtio_net_config, duplex)},
103 {.flags = (1ULL << VIRTIO_NET_F_RSS) | (1ULL << VIRTIO_NET_F_HASH_REPORT),
104 .end = endof(struct virtio_net_config, supported_hash_types)},
105 {}
106};
107
108static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc)
109{
110 VirtIONet *n = qemu_get_nic_opaque(nc);
111
112 return &n->vqs[nc->queue_index];
113}
114
115static int vq2q(int queue_index)
116{
117 return queue_index / 2;
118}
119
120
121
122
123
124static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
125{
126 VirtIONet *n = VIRTIO_NET(vdev);
127 struct virtio_net_config netcfg;
128 NetClientState *nc = qemu_get_queue(n->nic);
129
130 int ret = 0;
131 memset(&netcfg, 0 , sizeof(struct virtio_net_config));
132 virtio_stw_p(vdev, &netcfg.status, n->status);
133 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues);
134 virtio_stw_p(vdev, &netcfg.mtu, n->net_conf.mtu);
135 memcpy(netcfg.mac, n->mac, ETH_ALEN);
136 virtio_stl_p(vdev, &netcfg.speed, n->net_conf.speed);
137 netcfg.duplex = n->net_conf.duplex;
138 netcfg.rss_max_key_size = VIRTIO_NET_RSS_MAX_KEY_SIZE;
139 virtio_stw_p(vdev, &netcfg.rss_max_indirection_table_length,
140 virtio_host_has_feature(vdev, VIRTIO_NET_F_RSS) ?
141 VIRTIO_NET_RSS_MAX_TABLE_LEN : 1);
142 virtio_stl_p(vdev, &netcfg.supported_hash_types,
143 VIRTIO_NET_RSS_SUPPORTED_HASHES);
144 memcpy(config, &netcfg, n->config_size);
145
146
147
148
149
150 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_VDPA) {
151 ret = vhost_net_get_config(get_vhost_net(nc->peer), (uint8_t *)&netcfg,
152 n->config_size);
153 if (ret != -1) {
154 memcpy(config, &netcfg, n->config_size);
155 }
156 }
157}
158
159static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config)
160{
161 VirtIONet *n = VIRTIO_NET(vdev);
162 struct virtio_net_config netcfg = {};
163 NetClientState *nc = qemu_get_queue(n->nic);
164
165 memcpy(&netcfg, config, n->config_size);
166
167 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) &&
168 !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) &&
169 memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
170 memcpy(n->mac, netcfg.mac, ETH_ALEN);
171 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
172 }
173
174
175
176
177
178 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_VDPA) {
179 vhost_net_set_config(get_vhost_net(nc->peer),
180 (uint8_t *)&netcfg, 0, n->config_size,
181 VHOST_SET_CONFIG_TYPE_MASTER);
182 }
183}
184
185static bool virtio_net_started(VirtIONet *n, uint8_t status)
186{
187 VirtIODevice *vdev = VIRTIO_DEVICE(n);
188 return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
189 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running;
190}
191
192static void virtio_net_announce_notify(VirtIONet *net)
193{
194 VirtIODevice *vdev = VIRTIO_DEVICE(net);
195 trace_virtio_net_announce_notify();
196
197 net->status |= VIRTIO_NET_S_ANNOUNCE;
198 virtio_notify_config(vdev);
199}
200
201static void virtio_net_announce_timer(void *opaque)
202{
203 VirtIONet *n = opaque;
204 trace_virtio_net_announce_timer(n->announce_timer.round);
205
206 n->announce_timer.round--;
207 virtio_net_announce_notify(n);
208}
209
210static void virtio_net_announce(NetClientState *nc)
211{
212 VirtIONet *n = qemu_get_nic_opaque(nc);
213 VirtIODevice *vdev = VIRTIO_DEVICE(n);
214
215
216
217
218
219
220 if (n->announce_timer.round) {
221 return;
222 }
223
224 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) &&
225 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) {
226 virtio_net_announce_notify(n);
227 }
228}
229
230static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
231{
232 VirtIODevice *vdev = VIRTIO_DEVICE(n);
233 NetClientState *nc = qemu_get_queue(n->nic);
234 int queues = n->multiqueue ? n->max_queues : 1;
235
236 if (!get_vhost_net(nc->peer)) {
237 return;
238 }
239
240 if ((virtio_net_started(n, status) && !nc->peer->link_down) ==
241 !!n->vhost_started) {
242 return;
243 }
244 if (!n->vhost_started) {
245 int r, i;
246
247 if (n->needs_vnet_hdr_swap) {
248 error_report("backend does not support %s vnet headers; "
249 "falling back on userspace virtio",
250 virtio_is_big_endian(vdev) ? "BE" : "LE");
251 return;
252 }
253
254
255
256
257 for (i = 0; i < queues; i++) {
258 NetClientState *qnc = qemu_get_subqueue(n->nic, i);
259
260
261 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc);
262 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer);
263 }
264
265 if (virtio_has_feature(vdev->guest_features, VIRTIO_NET_F_MTU)) {
266 r = vhost_net_set_mtu(get_vhost_net(nc->peer), n->net_conf.mtu);
267 if (r < 0) {
268 error_report("%uBytes MTU not supported by the backend",
269 n->net_conf.mtu);
270
271 return;
272 }
273 }
274
275 n->vhost_started = 1;
276 r = vhost_net_start(vdev, n->nic->ncs, queues);
277 if (r < 0) {
278 error_report("unable to start vhost net: %d: "
279 "falling back on userspace virtio", -r);
280 n->vhost_started = 0;
281 }
282 } else {
283 vhost_net_stop(vdev, n->nic->ncs, queues);
284 n->vhost_started = 0;
285 }
286}
287
288static int virtio_net_set_vnet_endian_one(VirtIODevice *vdev,
289 NetClientState *peer,
290 bool enable)
291{
292 if (virtio_is_big_endian(vdev)) {
293 return qemu_set_vnet_be(peer, enable);
294 } else {
295 return qemu_set_vnet_le(peer, enable);
296 }
297}
298
299static bool virtio_net_set_vnet_endian(VirtIODevice *vdev, NetClientState *ncs,
300 int queues, bool enable)
301{
302 int i;
303
304 for (i = 0; i < queues; i++) {
305 if (virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, enable) < 0 &&
306 enable) {
307 while (--i >= 0) {
308 virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, false);
309 }
310
311 return true;
312 }
313 }
314
315 return false;
316}
317
318static void virtio_net_vnet_endian_status(VirtIONet *n, uint8_t status)
319{
320 VirtIODevice *vdev = VIRTIO_DEVICE(n);
321 int queues = n->multiqueue ? n->max_queues : 1;
322
323 if (virtio_net_started(n, status)) {
324
325
326
327
328
329 n->needs_vnet_hdr_swap = virtio_net_set_vnet_endian(vdev, n->nic->ncs,
330 queues, true);
331 } else if (virtio_net_started(n, vdev->status)) {
332
333
334
335
336
337 virtio_net_set_vnet_endian(vdev, n->nic->ncs, queues, false);
338 }
339}
340
341static void virtio_net_drop_tx_queue_data(VirtIODevice *vdev, VirtQueue *vq)
342{
343 unsigned int dropped = virtqueue_drop_all(vq);
344 if (dropped) {
345 virtio_notify(vdev, vq);
346 }
347}
348
349static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status)
350{
351 VirtIONet *n = VIRTIO_NET(vdev);
352 VirtIONetQueue *q;
353 int i;
354 uint8_t queue_status;
355
356 virtio_net_vnet_endian_status(n, status);
357 virtio_net_vhost_status(n, status);
358
359 for (i = 0; i < n->max_queues; i++) {
360 NetClientState *ncs = qemu_get_subqueue(n->nic, i);
361 bool queue_started;
362 q = &n->vqs[i];
363
364 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) {
365 queue_status = 0;
366 } else {
367 queue_status = status;
368 }
369 queue_started =
370 virtio_net_started(n, queue_status) && !n->vhost_started;
371
372 if (queue_started) {
373 qemu_flush_queued_packets(ncs);
374 }
375
376 if (!q->tx_waiting) {
377 continue;
378 }
379
380 if (queue_started) {
381 if (q->tx_timer) {
382 timer_mod(q->tx_timer,
383 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout);
384 } else {
385 qemu_bh_schedule(q->tx_bh);
386 }
387 } else {
388 if (q->tx_timer) {
389 timer_del(q->tx_timer);
390 } else {
391 qemu_bh_cancel(q->tx_bh);
392 }
393 if ((n->status & VIRTIO_NET_S_LINK_UP) == 0 &&
394 (queue_status & VIRTIO_CONFIG_S_DRIVER_OK) &&
395 vdev->vm_running) {
396
397
398 q->tx_waiting = 0;
399 virtio_queue_set_notification(q->tx_vq, 1);
400 virtio_net_drop_tx_queue_data(vdev, q->tx_vq);
401 }
402 }
403 }
404}
405
406static void virtio_net_set_link_status(NetClientState *nc)
407{
408 VirtIONet *n = qemu_get_nic_opaque(nc);
409 VirtIODevice *vdev = VIRTIO_DEVICE(n);
410 uint16_t old_status = n->status;
411
412 if (nc->link_down)
413 n->status &= ~VIRTIO_NET_S_LINK_UP;
414 else
415 n->status |= VIRTIO_NET_S_LINK_UP;
416
417 if (n->status != old_status)
418 virtio_notify_config(vdev);
419
420 virtio_net_set_status(vdev, vdev->status);
421}
422
423static void rxfilter_notify(NetClientState *nc)
424{
425 VirtIONet *n = qemu_get_nic_opaque(nc);
426
427 if (nc->rxfilter_notify_enabled) {
428 char *path = object_get_canonical_path(OBJECT(n->qdev));
429 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name,
430 n->netclient_name, path);
431 g_free(path);
432
433
434 nc->rxfilter_notify_enabled = 0;
435 }
436}
437
438static intList *get_vlan_table(VirtIONet *n)
439{
440 intList *list, *entry;
441 int i, j;
442
443 list = NULL;
444 for (i = 0; i < MAX_VLAN >> 5; i++) {
445 for (j = 0; n->vlans[i] && j <= 0x1f; j++) {
446 if (n->vlans[i] & (1U << j)) {
447 entry = g_malloc0(sizeof(*entry));
448 entry->value = (i << 5) + j;
449 entry->next = list;
450 list = entry;
451 }
452 }
453 }
454
455 return list;
456}
457
458static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc)
459{
460 VirtIONet *n = qemu_get_nic_opaque(nc);
461 VirtIODevice *vdev = VIRTIO_DEVICE(n);
462 RxFilterInfo *info;
463 strList *str_list, *entry;
464 int i;
465
466 info = g_malloc0(sizeof(*info));
467 info->name = g_strdup(nc->name);
468 info->promiscuous = n->promisc;
469
470 if (n->nouni) {
471 info->unicast = RX_STATE_NONE;
472 } else if (n->alluni) {
473 info->unicast = RX_STATE_ALL;
474 } else {
475 info->unicast = RX_STATE_NORMAL;
476 }
477
478 if (n->nomulti) {
479 info->multicast = RX_STATE_NONE;
480 } else if (n->allmulti) {
481 info->multicast = RX_STATE_ALL;
482 } else {
483 info->multicast = RX_STATE_NORMAL;
484 }
485
486 info->broadcast_allowed = n->nobcast;
487 info->multicast_overflow = n->mac_table.multi_overflow;
488 info->unicast_overflow = n->mac_table.uni_overflow;
489
490 info->main_mac = qemu_mac_strdup_printf(n->mac);
491
492 str_list = NULL;
493 for (i = 0; i < n->mac_table.first_multi; i++) {
494 entry = g_malloc0(sizeof(*entry));
495 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN);
496 entry->next = str_list;
497 str_list = entry;
498 }
499 info->unicast_table = str_list;
500
501 str_list = NULL;
502 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
503 entry = g_malloc0(sizeof(*entry));
504 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN);
505 entry->next = str_list;
506 str_list = entry;
507 }
508 info->multicast_table = str_list;
509 info->vlan_table = get_vlan_table(n);
510
511 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) {
512 info->vlan = RX_STATE_ALL;
513 } else if (!info->vlan_table) {
514 info->vlan = RX_STATE_NONE;
515 } else {
516 info->vlan = RX_STATE_NORMAL;
517 }
518
519
520 nc->rxfilter_notify_enabled = 1;
521
522 return info;
523}
524
525static void virtio_net_reset(VirtIODevice *vdev)
526{
527 VirtIONet *n = VIRTIO_NET(vdev);
528 int i;
529
530
531 n->promisc = 1;
532 n->allmulti = 0;
533 n->alluni = 0;
534 n->nomulti = 0;
535 n->nouni = 0;
536 n->nobcast = 0;
537
538 n->curr_queues = 1;
539 timer_del(n->announce_timer.tm);
540 n->announce_timer.round = 0;
541 n->status &= ~VIRTIO_NET_S_ANNOUNCE;
542
543
544 n->mac_table.in_use = 0;
545 n->mac_table.first_multi = 0;
546 n->mac_table.multi_overflow = 0;
547 n->mac_table.uni_overflow = 0;
548 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
549 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac));
550 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
551 memset(n->vlans, 0, MAX_VLAN >> 3);
552
553
554 for (i = 0; i < n->max_queues; i++) {
555 NetClientState *nc = qemu_get_subqueue(n->nic, i);
556
557 if (nc->peer) {
558 qemu_flush_or_purge_queued_packets(nc->peer, true);
559 assert(!virtio_net_get_subqueue(nc)->async_tx.elem);
560 }
561 }
562}
563
564static void peer_test_vnet_hdr(VirtIONet *n)
565{
566 NetClientState *nc = qemu_get_queue(n->nic);
567 if (!nc->peer) {
568 return;
569 }
570
571 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer);
572}
573
574static int peer_has_vnet_hdr(VirtIONet *n)
575{
576 return n->has_vnet_hdr;
577}
578
579static int peer_has_ufo(VirtIONet *n)
580{
581 if (!peer_has_vnet_hdr(n))
582 return 0;
583
584 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer);
585
586 return n->has_ufo;
587}
588
589static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs,
590 int version_1, int hash_report)
591{
592 int i;
593 NetClientState *nc;
594
595 n->mergeable_rx_bufs = mergeable_rx_bufs;
596
597 if (version_1) {
598 n->guest_hdr_len = hash_report ?
599 sizeof(struct virtio_net_hdr_v1_hash) :
600 sizeof(struct virtio_net_hdr_mrg_rxbuf);
601 n->rss_data.populate_hash = !!hash_report;
602 } else {
603 n->guest_hdr_len = n->mergeable_rx_bufs ?
604 sizeof(struct virtio_net_hdr_mrg_rxbuf) :
605 sizeof(struct virtio_net_hdr);
606 }
607
608 for (i = 0; i < n->max_queues; i++) {
609 nc = qemu_get_subqueue(n->nic, i);
610
611 if (peer_has_vnet_hdr(n) &&
612 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) {
613 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len);
614 n->host_hdr_len = n->guest_hdr_len;
615 }
616 }
617}
618
619static int virtio_net_max_tx_queue_size(VirtIONet *n)
620{
621 NetClientState *peer = n->nic_conf.peers.ncs[0];
622
623
624
625
626 if (!peer) {
627 return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE;
628 }
629
630 if (peer->info->type != NET_CLIENT_DRIVER_VHOST_USER) {
631 return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE;
632 }
633
634 return VIRTQUEUE_MAX_SIZE;
635}
636
637static int peer_attach(VirtIONet *n, int index)
638{
639 NetClientState *nc = qemu_get_subqueue(n->nic, index);
640
641 if (!nc->peer) {
642 return 0;
643 }
644
645 if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
646 vhost_set_vring_enable(nc->peer, 1);
647 }
648
649 if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) {
650 return 0;
651 }
652
653 if (n->max_queues == 1) {
654 return 0;
655 }
656
657 return tap_enable(nc->peer);
658}
659
660static int peer_detach(VirtIONet *n, int index)
661{
662 NetClientState *nc = qemu_get_subqueue(n->nic, index);
663
664 if (!nc->peer) {
665 return 0;
666 }
667
668 if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) {
669 vhost_set_vring_enable(nc->peer, 0);
670 }
671
672 if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) {
673 return 0;
674 }
675
676 return tap_disable(nc->peer);
677}
678
679static void virtio_net_set_queues(VirtIONet *n)
680{
681 int i;
682 int r;
683
684 if (n->nic->peer_deleted) {
685 return;
686 }
687
688 for (i = 0; i < n->max_queues; i++) {
689 if (i < n->curr_queues) {
690 r = peer_attach(n, i);
691 assert(!r);
692 } else {
693 r = peer_detach(n, i);
694 assert(!r);
695 }
696 }
697}
698
699static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue);
700
701static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features,
702 Error **errp)
703{
704 VirtIONet *n = VIRTIO_NET(vdev);
705 NetClientState *nc = qemu_get_queue(n->nic);
706
707
708 features |= n->host_features;
709
710 virtio_add_feature(&features, VIRTIO_NET_F_MAC);
711
712 if (!peer_has_vnet_hdr(n)) {
713 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM);
714 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4);
715 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6);
716 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN);
717
718 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM);
719 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4);
720 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6);
721 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN);
722
723 virtio_clear_feature(&features, VIRTIO_NET_F_HASH_REPORT);
724 }
725
726 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
727 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO);
728 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO);
729 }
730
731 if (!get_vhost_net(nc->peer)) {
732 return features;
733 }
734
735 virtio_clear_feature(&features, VIRTIO_NET_F_RSS);
736 virtio_clear_feature(&features, VIRTIO_NET_F_HASH_REPORT);
737 features = vhost_net_get_features(get_vhost_net(nc->peer), features);
738 vdev->backend_features = features;
739
740 if (n->mtu_bypass_backend &&
741 (n->host_features & 1ULL << VIRTIO_NET_F_MTU)) {
742 features |= (1ULL << VIRTIO_NET_F_MTU);
743 }
744
745 return features;
746}
747
748static uint64_t virtio_net_bad_features(VirtIODevice *vdev)
749{
750 uint64_t features = 0;
751
752
753
754 virtio_add_feature(&features, VIRTIO_NET_F_MAC);
755 virtio_add_feature(&features, VIRTIO_NET_F_CSUM);
756 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4);
757 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6);
758 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN);
759
760 return features;
761}
762
763static void virtio_net_apply_guest_offloads(VirtIONet *n)
764{
765 qemu_set_offload(qemu_get_queue(n->nic)->peer,
766 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)),
767 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)),
768 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)),
769 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)),
770 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO)));
771}
772
773static uint64_t virtio_net_guest_offloads_by_features(uint32_t features)
774{
775 static const uint64_t guest_offloads_mask =
776 (1ULL << VIRTIO_NET_F_GUEST_CSUM) |
777 (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
778 (1ULL << VIRTIO_NET_F_GUEST_TSO6) |
779 (1ULL << VIRTIO_NET_F_GUEST_ECN) |
780 (1ULL << VIRTIO_NET_F_GUEST_UFO);
781
782 return guest_offloads_mask & features;
783}
784
785static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n)
786{
787 VirtIODevice *vdev = VIRTIO_DEVICE(n);
788 return virtio_net_guest_offloads_by_features(vdev->guest_features);
789}
790
791static void failover_add_primary(VirtIONet *n, Error **errp)
792{
793 Error *err = NULL;
794
795 if (n->primary_dev) {
796 return;
797 }
798
799 n->primary_device_opts = qemu_opts_find(qemu_find_opts("device"),
800 n->primary_device_id);
801 if (n->primary_device_opts) {
802 n->primary_dev = qdev_device_add(n->primary_device_opts, &err);
803 if (err) {
804 qemu_opts_del(n->primary_device_opts);
805 }
806 if (n->primary_dev) {
807 n->primary_bus = n->primary_dev->parent_bus;
808 if (err) {
809 qdev_unplug(n->primary_dev, &err);
810 qdev_set_id(n->primary_dev, "");
811
812 }
813 }
814 } else {
815 error_setg(errp, "Primary device not found");
816 error_append_hint(errp, "Virtio-net failover will not work. Make "
817 "sure primary device has parameter"
818 " failover_pair_id=<virtio-net-id>\n");
819}
820 error_propagate(errp, err);
821}
822
823static int is_my_primary(void *opaque, QemuOpts *opts, Error **errp)
824{
825 VirtIONet *n = opaque;
826 int ret = 0;
827
828 const char *standby_id = qemu_opt_get(opts, "failover_pair_id");
829
830 if (standby_id != NULL && (g_strcmp0(standby_id, n->netclient_name) == 0)) {
831 n->primary_device_id = g_strdup(opts->id);
832 ret = 1;
833 }
834
835 return ret;
836}
837
838static DeviceState *virtio_net_find_primary(VirtIONet *n, Error **errp)
839{
840 DeviceState *dev = NULL;
841 Error *err = NULL;
842
843 if (qemu_opts_foreach(qemu_find_opts("device"),
844 is_my_primary, n, &err)) {
845 if (err) {
846 error_propagate(errp, err);
847 return NULL;
848 }
849 if (n->primary_device_id) {
850 dev = qdev_find_recursive(sysbus_get_default(),
851 n->primary_device_id);
852 } else {
853 error_setg(errp, "Primary device id not found");
854 return NULL;
855 }
856 }
857 return dev;
858}
859
860
861
862static DeviceState *virtio_connect_failover_devices(VirtIONet *n,
863 DeviceState *dev,
864 Error **errp)
865{
866 DeviceState *prim_dev = NULL;
867 Error *err = NULL;
868
869 prim_dev = virtio_net_find_primary(n, &err);
870 if (prim_dev) {
871 n->primary_device_id = g_strdup(prim_dev->id);
872 n->primary_device_opts = prim_dev->opts;
873 } else {
874 error_propagate(errp, err);
875 }
876
877 return prim_dev;
878}
879
880static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features)
881{
882 VirtIONet *n = VIRTIO_NET(vdev);
883 Error *err = NULL;
884 int i;
885
886 if (n->mtu_bypass_backend &&
887 !virtio_has_feature(vdev->backend_features, VIRTIO_NET_F_MTU)) {
888 features &= ~(1ULL << VIRTIO_NET_F_MTU);
889 }
890
891 virtio_net_set_multiqueue(n,
892 virtio_has_feature(features, VIRTIO_NET_F_RSS) ||
893 virtio_has_feature(features, VIRTIO_NET_F_MQ));
894
895 virtio_net_set_mrg_rx_bufs(n,
896 virtio_has_feature(features,
897 VIRTIO_NET_F_MRG_RXBUF),
898 virtio_has_feature(features,
899 VIRTIO_F_VERSION_1),
900 virtio_has_feature(features,
901 VIRTIO_NET_F_HASH_REPORT));
902
903 n->rsc4_enabled = virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT) &&
904 virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO4);
905 n->rsc6_enabled = virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT) &&
906 virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO6);
907 n->rss_data.redirect = virtio_has_feature(features, VIRTIO_NET_F_RSS);
908
909 if (n->has_vnet_hdr) {
910 n->curr_guest_offloads =
911 virtio_net_guest_offloads_by_features(features);
912 virtio_net_apply_guest_offloads(n);
913 }
914
915 for (i = 0; i < n->max_queues; i++) {
916 NetClientState *nc = qemu_get_subqueue(n->nic, i);
917
918 if (!get_vhost_net(nc->peer)) {
919 continue;
920 }
921 vhost_net_ack_features(get_vhost_net(nc->peer), features);
922 }
923
924 if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) {
925 memset(n->vlans, 0, MAX_VLAN >> 3);
926 } else {
927 memset(n->vlans, 0xff, MAX_VLAN >> 3);
928 }
929
930 if (virtio_has_feature(features, VIRTIO_NET_F_STANDBY)) {
931 qapi_event_send_failover_negotiated(n->netclient_name);
932 qatomic_set(&n->primary_should_be_hidden, false);
933 failover_add_primary(n, &err);
934 if (err) {
935 n->primary_dev = virtio_connect_failover_devices(n, n->qdev, &err);
936 if (err) {
937 goto out_err;
938 }
939 failover_add_primary(n, &err);
940 if (err) {
941 goto out_err;
942 }
943 }
944 }
945 return;
946
947out_err:
948 if (err) {
949 warn_report_err(err);
950 }
951}
952
953static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
954 struct iovec *iov, unsigned int iov_cnt)
955{
956 uint8_t on;
957 size_t s;
958 NetClientState *nc = qemu_get_queue(n->nic);
959
960 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on));
961 if (s != sizeof(on)) {
962 return VIRTIO_NET_ERR;
963 }
964
965 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) {
966 n->promisc = on;
967 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) {
968 n->allmulti = on;
969 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) {
970 n->alluni = on;
971 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) {
972 n->nomulti = on;
973 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) {
974 n->nouni = on;
975 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) {
976 n->nobcast = on;
977 } else {
978 return VIRTIO_NET_ERR;
979 }
980
981 rxfilter_notify(nc);
982
983 return VIRTIO_NET_OK;
984}
985
986static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd,
987 struct iovec *iov, unsigned int iov_cnt)
988{
989 VirtIODevice *vdev = VIRTIO_DEVICE(n);
990 uint64_t offloads;
991 size_t s;
992
993 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
994 return VIRTIO_NET_ERR;
995 }
996
997 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads));
998 if (s != sizeof(offloads)) {
999 return VIRTIO_NET_ERR;
1000 }
1001
1002 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) {
1003 uint64_t supported_offloads;
1004
1005 offloads = virtio_ldq_p(vdev, &offloads);
1006
1007 if (!n->has_vnet_hdr) {
1008 return VIRTIO_NET_ERR;
1009 }
1010
1011 n->rsc4_enabled = virtio_has_feature(offloads, VIRTIO_NET_F_RSC_EXT) &&
1012 virtio_has_feature(offloads, VIRTIO_NET_F_GUEST_TSO4);
1013 n->rsc6_enabled = virtio_has_feature(offloads, VIRTIO_NET_F_RSC_EXT) &&
1014 virtio_has_feature(offloads, VIRTIO_NET_F_GUEST_TSO6);
1015 virtio_clear_feature(&offloads, VIRTIO_NET_F_RSC_EXT);
1016
1017 supported_offloads = virtio_net_supported_guest_offloads(n);
1018 if (offloads & ~supported_offloads) {
1019 return VIRTIO_NET_ERR;
1020 }
1021
1022 n->curr_guest_offloads = offloads;
1023 virtio_net_apply_guest_offloads(n);
1024
1025 return VIRTIO_NET_OK;
1026 } else {
1027 return VIRTIO_NET_ERR;
1028 }
1029}
1030
1031static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
1032 struct iovec *iov, unsigned int iov_cnt)
1033{
1034 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1035 struct virtio_net_ctrl_mac mac_data;
1036 size_t s;
1037 NetClientState *nc = qemu_get_queue(n->nic);
1038
1039 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) {
1040 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) {
1041 return VIRTIO_NET_ERR;
1042 }
1043 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac));
1044 assert(s == sizeof(n->mac));
1045 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac);
1046 rxfilter_notify(nc);
1047
1048 return VIRTIO_NET_OK;
1049 }
1050
1051 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) {
1052 return VIRTIO_NET_ERR;
1053 }
1054
1055 int in_use = 0;
1056 int first_multi = 0;
1057 uint8_t uni_overflow = 0;
1058 uint8_t multi_overflow = 0;
1059 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);
1060
1061 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
1062 sizeof(mac_data.entries));
1063 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries);
1064 if (s != sizeof(mac_data.entries)) {
1065 goto error;
1066 }
1067 iov_discard_front(&iov, &iov_cnt, s);
1068
1069 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) {
1070 goto error;
1071 }
1072
1073 if (mac_data.entries <= MAC_TABLE_ENTRIES) {
1074 s = iov_to_buf(iov, iov_cnt, 0, macs,
1075 mac_data.entries * ETH_ALEN);
1076 if (s != mac_data.entries * ETH_ALEN) {
1077 goto error;
1078 }
1079 in_use += mac_data.entries;
1080 } else {
1081 uni_overflow = 1;
1082 }
1083
1084 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN);
1085
1086 first_multi = in_use;
1087
1088 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
1089 sizeof(mac_data.entries));
1090 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries);
1091 if (s != sizeof(mac_data.entries)) {
1092 goto error;
1093 }
1094
1095 iov_discard_front(&iov, &iov_cnt, s);
1096
1097 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) {
1098 goto error;
1099 }
1100
1101 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) {
1102 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN],
1103 mac_data.entries * ETH_ALEN);
1104 if (s != mac_data.entries * ETH_ALEN) {
1105 goto error;
1106 }
1107 in_use += mac_data.entries;
1108 } else {
1109 multi_overflow = 1;
1110 }
1111
1112 n->mac_table.in_use = in_use;
1113 n->mac_table.first_multi = first_multi;
1114 n->mac_table.uni_overflow = uni_overflow;
1115 n->mac_table.multi_overflow = multi_overflow;
1116 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN);
1117 g_free(macs);
1118 rxfilter_notify(nc);
1119
1120 return VIRTIO_NET_OK;
1121
1122error:
1123 g_free(macs);
1124 return VIRTIO_NET_ERR;
1125}
1126
1127static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd,
1128 struct iovec *iov, unsigned int iov_cnt)
1129{
1130 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1131 uint16_t vid;
1132 size_t s;
1133 NetClientState *nc = qemu_get_queue(n->nic);
1134
1135 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid));
1136 vid = virtio_lduw_p(vdev, &vid);
1137 if (s != sizeof(vid)) {
1138 return VIRTIO_NET_ERR;
1139 }
1140
1141 if (vid >= MAX_VLAN)
1142 return VIRTIO_NET_ERR;
1143
1144 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
1145 n->vlans[vid >> 5] |= (1U << (vid & 0x1f));
1146 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL)
1147 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f));
1148 else
1149 return VIRTIO_NET_ERR;
1150
1151 rxfilter_notify(nc);
1152
1153 return VIRTIO_NET_OK;
1154}
1155
1156static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd,
1157 struct iovec *iov, unsigned int iov_cnt)
1158{
1159 trace_virtio_net_handle_announce(n->announce_timer.round);
1160 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK &&
1161 n->status & VIRTIO_NET_S_ANNOUNCE) {
1162 n->status &= ~VIRTIO_NET_S_ANNOUNCE;
1163 if (n->announce_timer.round) {
1164 qemu_announce_timer_step(&n->announce_timer);
1165 }
1166 return VIRTIO_NET_OK;
1167 } else {
1168 return VIRTIO_NET_ERR;
1169 }
1170}
1171
1172static void virtio_net_disable_rss(VirtIONet *n)
1173{
1174 if (n->rss_data.enabled) {
1175 trace_virtio_net_rss_disable();
1176 }
1177 n->rss_data.enabled = false;
1178}
1179
1180static uint16_t virtio_net_handle_rss(VirtIONet *n,
1181 struct iovec *iov,
1182 unsigned int iov_cnt,
1183 bool do_rss)
1184{
1185 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1186 struct virtio_net_rss_config cfg;
1187 size_t s, offset = 0, size_get;
1188 uint16_t queues, i;
1189 struct {
1190 uint16_t us;
1191 uint8_t b;
1192 } QEMU_PACKED temp;
1193 const char *err_msg = "";
1194 uint32_t err_value = 0;
1195
1196 if (do_rss && !virtio_vdev_has_feature(vdev, VIRTIO_NET_F_RSS)) {
1197 err_msg = "RSS is not negotiated";
1198 goto error;
1199 }
1200 if (!do_rss && !virtio_vdev_has_feature(vdev, VIRTIO_NET_F_HASH_REPORT)) {
1201 err_msg = "Hash report is not negotiated";
1202 goto error;
1203 }
1204 size_get = offsetof(struct virtio_net_rss_config, indirection_table);
1205 s = iov_to_buf(iov, iov_cnt, offset, &cfg, size_get);
1206 if (s != size_get) {
1207 err_msg = "Short command buffer";
1208 err_value = (uint32_t)s;
1209 goto error;
1210 }
1211 n->rss_data.hash_types = virtio_ldl_p(vdev, &cfg.hash_types);
1212 n->rss_data.indirections_len =
1213 virtio_lduw_p(vdev, &cfg.indirection_table_mask);
1214 n->rss_data.indirections_len++;
1215 if (!do_rss) {
1216 n->rss_data.indirections_len = 1;
1217 }
1218 if (!is_power_of_2(n->rss_data.indirections_len)) {
1219 err_msg = "Invalid size of indirection table";
1220 err_value = n->rss_data.indirections_len;
1221 goto error;
1222 }
1223 if (n->rss_data.indirections_len > VIRTIO_NET_RSS_MAX_TABLE_LEN) {
1224 err_msg = "Too large indirection table";
1225 err_value = n->rss_data.indirections_len;
1226 goto error;
1227 }
1228 n->rss_data.default_queue = do_rss ?
1229 virtio_lduw_p(vdev, &cfg.unclassified_queue) : 0;
1230 if (n->rss_data.default_queue >= n->max_queues) {
1231 err_msg = "Invalid default queue";
1232 err_value = n->rss_data.default_queue;
1233 goto error;
1234 }
1235 offset += size_get;
1236 size_get = sizeof(uint16_t) * n->rss_data.indirections_len;
1237 g_free(n->rss_data.indirections_table);
1238 n->rss_data.indirections_table = g_malloc(size_get);
1239 if (!n->rss_data.indirections_table) {
1240 err_msg = "Can't allocate indirections table";
1241 err_value = n->rss_data.indirections_len;
1242 goto error;
1243 }
1244 s = iov_to_buf(iov, iov_cnt, offset,
1245 n->rss_data.indirections_table, size_get);
1246 if (s != size_get) {
1247 err_msg = "Short indirection table buffer";
1248 err_value = (uint32_t)s;
1249 goto error;
1250 }
1251 for (i = 0; i < n->rss_data.indirections_len; ++i) {
1252 uint16_t val = n->rss_data.indirections_table[i];
1253 n->rss_data.indirections_table[i] = virtio_lduw_p(vdev, &val);
1254 }
1255 offset += size_get;
1256 size_get = sizeof(temp);
1257 s = iov_to_buf(iov, iov_cnt, offset, &temp, size_get);
1258 if (s != size_get) {
1259 err_msg = "Can't get queues";
1260 err_value = (uint32_t)s;
1261 goto error;
1262 }
1263 queues = do_rss ? virtio_lduw_p(vdev, &temp.us) : n->curr_queues;
1264 if (queues == 0 || queues > n->max_queues) {
1265 err_msg = "Invalid number of queues";
1266 err_value = queues;
1267 goto error;
1268 }
1269 if (temp.b > VIRTIO_NET_RSS_MAX_KEY_SIZE) {
1270 err_msg = "Invalid key size";
1271 err_value = temp.b;
1272 goto error;
1273 }
1274 if (!temp.b && n->rss_data.hash_types) {
1275 err_msg = "No key provided";
1276 err_value = 0;
1277 goto error;
1278 }
1279 if (!temp.b && !n->rss_data.hash_types) {
1280 virtio_net_disable_rss(n);
1281 return queues;
1282 }
1283 offset += size_get;
1284 size_get = temp.b;
1285 s = iov_to_buf(iov, iov_cnt, offset, n->rss_data.key, size_get);
1286 if (s != size_get) {
1287 err_msg = "Can get key buffer";
1288 err_value = (uint32_t)s;
1289 goto error;
1290 }
1291 n->rss_data.enabled = true;
1292 trace_virtio_net_rss_enable(n->rss_data.hash_types,
1293 n->rss_data.indirections_len,
1294 temp.b);
1295 return queues;
1296error:
1297 trace_virtio_net_rss_error(err_msg, err_value);
1298 virtio_net_disable_rss(n);
1299 return 0;
1300}
1301
1302static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
1303 struct iovec *iov, unsigned int iov_cnt)
1304{
1305 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1306 uint16_t queues;
1307
1308 virtio_net_disable_rss(n);
1309 if (cmd == VIRTIO_NET_CTRL_MQ_HASH_CONFIG) {
1310 queues = virtio_net_handle_rss(n, iov, iov_cnt, false);
1311 return queues ? VIRTIO_NET_OK : VIRTIO_NET_ERR;
1312 }
1313 if (cmd == VIRTIO_NET_CTRL_MQ_RSS_CONFIG) {
1314 queues = virtio_net_handle_rss(n, iov, iov_cnt, true);
1315 } else if (cmd == VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
1316 struct virtio_net_ctrl_mq mq;
1317 size_t s;
1318 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_MQ)) {
1319 return VIRTIO_NET_ERR;
1320 }
1321 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq));
1322 if (s != sizeof(mq)) {
1323 return VIRTIO_NET_ERR;
1324 }
1325 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs);
1326
1327 } else {
1328 return VIRTIO_NET_ERR;
1329 }
1330
1331 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
1332 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX ||
1333 queues > n->max_queues ||
1334 !n->multiqueue) {
1335 return VIRTIO_NET_ERR;
1336 }
1337
1338 n->curr_queues = queues;
1339
1340
1341 virtio_net_set_status(vdev, vdev->status);
1342 virtio_net_set_queues(n);
1343
1344 return VIRTIO_NET_OK;
1345}
1346
1347static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
1348{
1349 VirtIONet *n = VIRTIO_NET(vdev);
1350 struct virtio_net_ctrl_hdr ctrl;
1351 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
1352 VirtQueueElement *elem;
1353 size_t s;
1354 struct iovec *iov, *iov2;
1355 unsigned int iov_cnt;
1356
1357 for (;;) {
1358 elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
1359 if (!elem) {
1360 break;
1361 }
1362 if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) ||
1363 iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) {
1364 virtio_error(vdev, "virtio-net ctrl missing headers");
1365 virtqueue_detach_element(vq, elem, 0);
1366 g_free(elem);
1367 break;
1368 }
1369
1370 iov_cnt = elem->out_num;
1371 iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num);
1372 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl));
1373 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl));
1374 if (s != sizeof(ctrl)) {
1375 status = VIRTIO_NET_ERR;
1376 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) {
1377 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt);
1378 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) {
1379 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt);
1380 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) {
1381 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt);
1382 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) {
1383 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt);
1384 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) {
1385 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt);
1386 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) {
1387 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt);
1388 }
1389
1390 s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status));
1391 assert(s == sizeof(status));
1392
1393 virtqueue_push(vq, elem, sizeof(status));
1394 virtio_notify(vdev, vq);
1395 g_free(iov2);
1396 g_free(elem);
1397 }
1398}
1399
1400
1401
1402static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq)
1403{
1404 VirtIONet *n = VIRTIO_NET(vdev);
1405 int queue_index = vq2q(virtio_get_queue_index(vq));
1406
1407 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index));
1408}
1409
1410static bool virtio_net_can_receive(NetClientState *nc)
1411{
1412 VirtIONet *n = qemu_get_nic_opaque(nc);
1413 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1414 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
1415
1416 if (!vdev->vm_running) {
1417 return false;
1418 }
1419
1420 if (nc->queue_index >= n->curr_queues) {
1421 return false;
1422 }
1423
1424 if (!virtio_queue_ready(q->rx_vq) ||
1425 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
1426 return false;
1427 }
1428
1429 return true;
1430}
1431
1432static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize)
1433{
1434 VirtIONet *n = q->n;
1435 if (virtio_queue_empty(q->rx_vq) ||
1436 (n->mergeable_rx_bufs &&
1437 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
1438 virtio_queue_set_notification(q->rx_vq, 1);
1439
1440
1441
1442
1443
1444 if (virtio_queue_empty(q->rx_vq) ||
1445 (n->mergeable_rx_bufs &&
1446 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
1447 return 0;
1448 }
1449 }
1450
1451 virtio_queue_set_notification(q->rx_vq, 0);
1452 return 1;
1453}
1454
1455static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr)
1456{
1457 virtio_tswap16s(vdev, &hdr->hdr_len);
1458 virtio_tswap16s(vdev, &hdr->gso_size);
1459 virtio_tswap16s(vdev, &hdr->csum_start);
1460 virtio_tswap16s(vdev, &hdr->csum_offset);
1461}
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477static void work_around_broken_dhclient(struct virtio_net_hdr *hdr,
1478 uint8_t *buf, size_t size)
1479{
1480 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
1481 (size > 27 && size < 1500) &&
1482 (buf[12] == 0x08 && buf[13] == 0x00) &&
1483 (buf[23] == 17) &&
1484 (buf[34] == 0 && buf[35] == 67)) {
1485 net_checksum_calculate(buf, size);
1486 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM;
1487 }
1488}
1489
1490static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt,
1491 const void *buf, size_t size)
1492{
1493 if (n->has_vnet_hdr) {
1494
1495 void *wbuf = (void *)buf;
1496 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len,
1497 size - n->host_hdr_len);
1498
1499 if (n->needs_vnet_hdr_swap) {
1500 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf);
1501 }
1502 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr));
1503 } else {
1504 struct virtio_net_hdr hdr = {
1505 .flags = 0,
1506 .gso_type = VIRTIO_NET_HDR_GSO_NONE
1507 };
1508 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr);
1509 }
1510}
1511
1512static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
1513{
1514 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1515 static const uint8_t vlan[] = {0x81, 0x00};
1516 uint8_t *ptr = (uint8_t *)buf;
1517 int i;
1518
1519 if (n->promisc)
1520 return 1;
1521
1522 ptr += n->host_hdr_len;
1523
1524 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) {
1525 int vid = lduw_be_p(ptr + 14) & 0xfff;
1526 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f))))
1527 return 0;
1528 }
1529
1530 if (ptr[0] & 1) {
1531 if (!memcmp(ptr, bcast, sizeof(bcast))) {
1532 return !n->nobcast;
1533 } else if (n->nomulti) {
1534 return 0;
1535 } else if (n->allmulti || n->mac_table.multi_overflow) {
1536 return 1;
1537 }
1538
1539 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
1540 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
1541 return 1;
1542 }
1543 }
1544 } else {
1545 if (n->nouni) {
1546 return 0;
1547 } else if (n->alluni || n->mac_table.uni_overflow) {
1548 return 1;
1549 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) {
1550 return 1;
1551 }
1552
1553 for (i = 0; i < n->mac_table.first_multi; i++) {
1554 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
1555 return 1;
1556 }
1557 }
1558 }
1559
1560 return 0;
1561}
1562
1563static uint8_t virtio_net_get_hash_type(bool isip4,
1564 bool isip6,
1565 bool isudp,
1566 bool istcp,
1567 uint32_t types)
1568{
1569 if (isip4) {
1570 if (istcp && (types & VIRTIO_NET_RSS_HASH_TYPE_TCPv4)) {
1571 return NetPktRssIpV4Tcp;
1572 }
1573 if (isudp && (types & VIRTIO_NET_RSS_HASH_TYPE_UDPv4)) {
1574 return NetPktRssIpV4Udp;
1575 }
1576 if (types & VIRTIO_NET_RSS_HASH_TYPE_IPv4) {
1577 return NetPktRssIpV4;
1578 }
1579 } else if (isip6) {
1580 uint32_t mask = VIRTIO_NET_RSS_HASH_TYPE_TCP_EX |
1581 VIRTIO_NET_RSS_HASH_TYPE_TCPv6;
1582
1583 if (istcp && (types & mask)) {
1584 return (types & VIRTIO_NET_RSS_HASH_TYPE_TCP_EX) ?
1585 NetPktRssIpV6TcpEx : NetPktRssIpV6Tcp;
1586 }
1587 mask = VIRTIO_NET_RSS_HASH_TYPE_UDP_EX | VIRTIO_NET_RSS_HASH_TYPE_UDPv6;
1588 if (isudp && (types & mask)) {
1589 return (types & VIRTIO_NET_RSS_HASH_TYPE_UDP_EX) ?
1590 NetPktRssIpV6UdpEx : NetPktRssIpV6Udp;
1591 }
1592 mask = VIRTIO_NET_RSS_HASH_TYPE_IP_EX | VIRTIO_NET_RSS_HASH_TYPE_IPv6;
1593 if (types & mask) {
1594 return (types & VIRTIO_NET_RSS_HASH_TYPE_IP_EX) ?
1595 NetPktRssIpV6Ex : NetPktRssIpV6;
1596 }
1597 }
1598 return 0xff;
1599}
1600
1601static void virtio_set_packet_hash(const uint8_t *buf, uint8_t report,
1602 uint32_t hash)
1603{
1604 struct virtio_net_hdr_v1_hash *hdr = (void *)buf;
1605 hdr->hash_value = hash;
1606 hdr->hash_report = report;
1607}
1608
1609static int virtio_net_process_rss(NetClientState *nc, const uint8_t *buf,
1610 size_t size)
1611{
1612 VirtIONet *n = qemu_get_nic_opaque(nc);
1613 unsigned int index = nc->queue_index, new_index = index;
1614 struct NetRxPkt *pkt = n->rx_pkt;
1615 uint8_t net_hash_type;
1616 uint32_t hash;
1617 bool isip4, isip6, isudp, istcp;
1618 static const uint8_t reports[NetPktRssIpV6UdpEx + 1] = {
1619 VIRTIO_NET_HASH_REPORT_IPv4,
1620 VIRTIO_NET_HASH_REPORT_TCPv4,
1621 VIRTIO_NET_HASH_REPORT_TCPv6,
1622 VIRTIO_NET_HASH_REPORT_IPv6,
1623 VIRTIO_NET_HASH_REPORT_IPv6_EX,
1624 VIRTIO_NET_HASH_REPORT_TCPv6_EX,
1625 VIRTIO_NET_HASH_REPORT_UDPv4,
1626 VIRTIO_NET_HASH_REPORT_UDPv6,
1627 VIRTIO_NET_HASH_REPORT_UDPv6_EX
1628 };
1629
1630 net_rx_pkt_set_protocols(pkt, buf + n->host_hdr_len,
1631 size - n->host_hdr_len);
1632 net_rx_pkt_get_protocols(pkt, &isip4, &isip6, &isudp, &istcp);
1633 if (isip4 && (net_rx_pkt_get_ip4_info(pkt)->fragment)) {
1634 istcp = isudp = false;
1635 }
1636 if (isip6 && (net_rx_pkt_get_ip6_info(pkt)->fragment)) {
1637 istcp = isudp = false;
1638 }
1639 net_hash_type = virtio_net_get_hash_type(isip4, isip6, isudp, istcp,
1640 n->rss_data.hash_types);
1641 if (net_hash_type > NetPktRssIpV6UdpEx) {
1642 if (n->rss_data.populate_hash) {
1643 virtio_set_packet_hash(buf, VIRTIO_NET_HASH_REPORT_NONE, 0);
1644 }
1645 return n->rss_data.redirect ? n->rss_data.default_queue : -1;
1646 }
1647
1648 hash = net_rx_pkt_calc_rss_hash(pkt, net_hash_type, n->rss_data.key);
1649
1650 if (n->rss_data.populate_hash) {
1651 virtio_set_packet_hash(buf, reports[net_hash_type], hash);
1652 }
1653
1654 if (n->rss_data.redirect) {
1655 new_index = hash & (n->rss_data.indirections_len - 1);
1656 new_index = n->rss_data.indirections_table[new_index];
1657 }
1658
1659 return (index == new_index) ? -1 : new_index;
1660}
1661
1662static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
1663 size_t size, bool no_rss)
1664{
1665 VirtIONet *n = qemu_get_nic_opaque(nc);
1666 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
1667 VirtIODevice *vdev = VIRTIO_DEVICE(n);
1668 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE];
1669 struct virtio_net_hdr_mrg_rxbuf mhdr;
1670 unsigned mhdr_cnt = 0;
1671 size_t offset, i, guest_offset;
1672
1673 if (!virtio_net_can_receive(nc)) {
1674 return -1;
1675 }
1676
1677 if (!no_rss && n->rss_data.enabled) {
1678 int index = virtio_net_process_rss(nc, buf, size);
1679 if (index >= 0) {
1680 NetClientState *nc2 = qemu_get_subqueue(n->nic, index);
1681 return virtio_net_receive_rcu(nc2, buf, size, true);
1682 }
1683 }
1684
1685
1686 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) {
1687 return 0;
1688 }
1689
1690 if (!receive_filter(n, buf, size))
1691 return size;
1692
1693 offset = i = 0;
1694
1695 while (offset < size) {
1696 VirtQueueElement *elem;
1697 int len, total;
1698 const struct iovec *sg;
1699
1700 total = 0;
1701
1702 elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement));
1703 if (!elem) {
1704 if (i) {
1705 virtio_error(vdev, "virtio-net unexpected empty queue: "
1706 "i %zd mergeable %d offset %zd, size %zd, "
1707 "guest hdr len %zd, host hdr len %zd "
1708 "guest features 0x%" PRIx64,
1709 i, n->mergeable_rx_bufs, offset, size,
1710 n->guest_hdr_len, n->host_hdr_len,
1711 vdev->guest_features);
1712 }
1713 return -1;
1714 }
1715
1716 if (elem->in_num < 1) {
1717 virtio_error(vdev,
1718 "virtio-net receive queue contains no in buffers");
1719 virtqueue_detach_element(q->rx_vq, elem, 0);
1720 g_free(elem);
1721 return -1;
1722 }
1723
1724 sg = elem->in_sg;
1725 if (i == 0) {
1726 assert(offset == 0);
1727 if (n->mergeable_rx_bufs) {
1728 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg),
1729 sg, elem->in_num,
1730 offsetof(typeof(mhdr), num_buffers),
1731 sizeof(mhdr.num_buffers));
1732 }
1733
1734 receive_header(n, sg, elem->in_num, buf, size);
1735 if (n->rss_data.populate_hash) {
1736 offset = sizeof(mhdr);
1737 iov_from_buf(sg, elem->in_num, offset,
1738 buf + offset, n->host_hdr_len - sizeof(mhdr));
1739 }
1740 offset = n->host_hdr_len;
1741 total += n->guest_hdr_len;
1742 guest_offset = n->guest_hdr_len;
1743 } else {
1744 guest_offset = 0;
1745 }
1746
1747
1748 len = iov_from_buf(sg, elem->in_num, guest_offset,
1749 buf + offset, size - offset);
1750 total += len;
1751 offset += len;
1752
1753
1754
1755 if (!n->mergeable_rx_bufs && offset < size) {
1756 virtqueue_unpop(q->rx_vq, elem, total);
1757 g_free(elem);
1758 return size;
1759 }
1760
1761
1762 virtqueue_fill(q->rx_vq, elem, total, i++);
1763 g_free(elem);
1764 }
1765
1766 if (mhdr_cnt) {
1767 virtio_stw_p(vdev, &mhdr.num_buffers, i);
1768 iov_from_buf(mhdr_sg, mhdr_cnt,
1769 0,
1770 &mhdr.num_buffers, sizeof mhdr.num_buffers);
1771 }
1772
1773 virtqueue_flush(q->rx_vq, i);
1774 virtio_notify(vdev, q->rx_vq);
1775
1776 return size;
1777}
1778
1779static ssize_t virtio_net_do_receive(NetClientState *nc, const uint8_t *buf,
1780 size_t size)
1781{
1782 RCU_READ_LOCK_GUARD();
1783
1784 return virtio_net_receive_rcu(nc, buf, size, false);
1785}
1786
1787static void virtio_net_rsc_extract_unit4(VirtioNetRscChain *chain,
1788 const uint8_t *buf,
1789 VirtioNetRscUnit *unit)
1790{
1791 uint16_t ip_hdrlen;
1792 struct ip_header *ip;
1793
1794 ip = (struct ip_header *)(buf + chain->n->guest_hdr_len
1795 + sizeof(struct eth_header));
1796 unit->ip = (void *)ip;
1797 ip_hdrlen = (ip->ip_ver_len & 0xF) << 2;
1798 unit->ip_plen = &ip->ip_len;
1799 unit->tcp = (struct tcp_header *)(((uint8_t *)unit->ip) + ip_hdrlen);
1800 unit->tcp_hdrlen = (htons(unit->tcp->th_offset_flags) & 0xF000) >> 10;
1801 unit->payload = htons(*unit->ip_plen) - ip_hdrlen - unit->tcp_hdrlen;
1802}
1803
1804static void virtio_net_rsc_extract_unit6(VirtioNetRscChain *chain,
1805 const uint8_t *buf,
1806 VirtioNetRscUnit *unit)
1807{
1808 struct ip6_header *ip6;
1809
1810 ip6 = (struct ip6_header *)(buf + chain->n->guest_hdr_len
1811 + sizeof(struct eth_header));
1812 unit->ip = ip6;
1813 unit->ip_plen = &(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen);
1814 unit->tcp = (struct tcp_header *)(((uint8_t *)unit->ip)
1815 + sizeof(struct ip6_header));
1816 unit->tcp_hdrlen = (htons(unit->tcp->th_offset_flags) & 0xF000) >> 10;
1817
1818
1819
1820 unit->payload = htons(*unit->ip_plen) - unit->tcp_hdrlen;
1821}
1822
1823static size_t virtio_net_rsc_drain_seg(VirtioNetRscChain *chain,
1824 VirtioNetRscSeg *seg)
1825{
1826 int ret;
1827 struct virtio_net_hdr_v1 *h;
1828
1829 h = (struct virtio_net_hdr_v1 *)seg->buf;
1830 h->flags = 0;
1831 h->gso_type = VIRTIO_NET_HDR_GSO_NONE;
1832
1833 if (seg->is_coalesced) {
1834 h->rsc.segments = seg->packets;
1835 h->rsc.dup_acks = seg->dup_ack;
1836 h->flags = VIRTIO_NET_HDR_F_RSC_INFO;
1837 if (chain->proto == ETH_P_IP) {
1838 h->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
1839 } else {
1840 h->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
1841 }
1842 }
1843
1844 ret = virtio_net_do_receive(seg->nc, seg->buf, seg->size);
1845 QTAILQ_REMOVE(&chain->buffers, seg, next);
1846 g_free(seg->buf);
1847 g_free(seg);
1848
1849 return ret;
1850}
1851
1852static void virtio_net_rsc_purge(void *opq)
1853{
1854 VirtioNetRscSeg *seg, *rn;
1855 VirtioNetRscChain *chain = (VirtioNetRscChain *)opq;
1856
1857 QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn) {
1858 if (virtio_net_rsc_drain_seg(chain, seg) == 0) {
1859 chain->stat.purge_failed++;
1860 continue;
1861 }
1862 }
1863
1864 chain->stat.timer++;
1865 if (!QTAILQ_EMPTY(&chain->buffers)) {
1866 timer_mod(chain->drain_timer,
1867 qemu_clock_get_ns(QEMU_CLOCK_HOST) + chain->n->rsc_timeout);
1868 }
1869}
1870
1871static void virtio_net_rsc_cleanup(VirtIONet *n)
1872{
1873 VirtioNetRscChain *chain, *rn_chain;
1874 VirtioNetRscSeg *seg, *rn_seg;
1875
1876 QTAILQ_FOREACH_SAFE(chain, &n->rsc_chains, next, rn_chain) {
1877 QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn_seg) {
1878 QTAILQ_REMOVE(&chain->buffers, seg, next);
1879 g_free(seg->buf);
1880 g_free(seg);
1881 }
1882
1883 timer_del(chain->drain_timer);
1884 timer_free(chain->drain_timer);
1885 QTAILQ_REMOVE(&n->rsc_chains, chain, next);
1886 g_free(chain);
1887 }
1888}
1889
1890static void virtio_net_rsc_cache_buf(VirtioNetRscChain *chain,
1891 NetClientState *nc,
1892 const uint8_t *buf, size_t size)
1893{
1894 uint16_t hdr_len;
1895 VirtioNetRscSeg *seg;
1896
1897 hdr_len = chain->n->guest_hdr_len;
1898 seg = g_malloc(sizeof(VirtioNetRscSeg));
1899 seg->buf = g_malloc(hdr_len + sizeof(struct eth_header)
1900 + sizeof(struct ip6_header) + VIRTIO_NET_MAX_TCP_PAYLOAD);
1901 memcpy(seg->buf, buf, size);
1902 seg->size = size;
1903 seg->packets = 1;
1904 seg->dup_ack = 0;
1905 seg->is_coalesced = 0;
1906 seg->nc = nc;
1907
1908 QTAILQ_INSERT_TAIL(&chain->buffers, seg, next);
1909 chain->stat.cache++;
1910
1911 switch (chain->proto) {
1912 case ETH_P_IP:
1913 virtio_net_rsc_extract_unit4(chain, seg->buf, &seg->unit);
1914 break;
1915 case ETH_P_IPV6:
1916 virtio_net_rsc_extract_unit6(chain, seg->buf, &seg->unit);
1917 break;
1918 default:
1919 g_assert_not_reached();
1920 }
1921}
1922
1923static int32_t virtio_net_rsc_handle_ack(VirtioNetRscChain *chain,
1924 VirtioNetRscSeg *seg,
1925 const uint8_t *buf,
1926 struct tcp_header *n_tcp,
1927 struct tcp_header *o_tcp)
1928{
1929 uint32_t nack, oack;
1930 uint16_t nwin, owin;
1931
1932 nack = htonl(n_tcp->th_ack);
1933 nwin = htons(n_tcp->th_win);
1934 oack = htonl(o_tcp->th_ack);
1935 owin = htons(o_tcp->th_win);
1936
1937 if ((nack - oack) >= VIRTIO_NET_MAX_TCP_PAYLOAD) {
1938 chain->stat.ack_out_of_win++;
1939 return RSC_FINAL;
1940 } else if (nack == oack) {
1941
1942 if (nwin == owin) {
1943
1944 chain->stat.dup_ack++;
1945 return RSC_FINAL;
1946 } else {
1947
1948 o_tcp->th_win = n_tcp->th_win;
1949 chain->stat.win_update++;
1950 return RSC_COALESCE;
1951 }
1952 } else {
1953
1954 chain->stat.pure_ack++;
1955 return RSC_FINAL;
1956 }
1957}
1958
1959static int32_t virtio_net_rsc_coalesce_data(VirtioNetRscChain *chain,
1960 VirtioNetRscSeg *seg,
1961 const uint8_t *buf,
1962 VirtioNetRscUnit *n_unit)
1963{
1964 void *data;
1965 uint16_t o_ip_len;
1966 uint32_t nseq, oseq;
1967 VirtioNetRscUnit *o_unit;
1968
1969 o_unit = &seg->unit;
1970 o_ip_len = htons(*o_unit->ip_plen);
1971 nseq = htonl(n_unit->tcp->th_seq);
1972 oseq = htonl(o_unit->tcp->th_seq);
1973
1974
1975 if ((nseq - oseq) > VIRTIO_NET_MAX_TCP_PAYLOAD) {
1976 chain->stat.data_out_of_win++;
1977 return RSC_FINAL;
1978 }
1979
1980 data = ((uint8_t *)n_unit->tcp) + n_unit->tcp_hdrlen;
1981 if (nseq == oseq) {
1982 if ((o_unit->payload == 0) && n_unit->payload) {
1983
1984 chain->stat.data_after_pure_ack++;
1985 goto coalesce;
1986 } else {
1987 return virtio_net_rsc_handle_ack(chain, seg, buf,
1988 n_unit->tcp, o_unit->tcp);
1989 }
1990 } else if ((nseq - oseq) != o_unit->payload) {
1991
1992 chain->stat.data_out_of_order++;
1993 return RSC_FINAL;
1994 } else {
1995coalesce:
1996 if ((o_ip_len + n_unit->payload) > chain->max_payload) {
1997 chain->stat.over_size++;
1998 return RSC_FINAL;
1999 }
2000
2001
2002
2003 o_unit->payload += n_unit->payload;
2004
2005
2006 *o_unit->ip_plen = htons(o_ip_len + n_unit->payload);
2007
2008
2009
2010
2011 o_unit->tcp->th_offset_flags = n_unit->tcp->th_offset_flags;
2012
2013 o_unit->tcp->th_ack = n_unit->tcp->th_ack;
2014 o_unit->tcp->th_win = n_unit->tcp->th_win;
2015
2016 memmove(seg->buf + seg->size, data, n_unit->payload);
2017 seg->size += n_unit->payload;
2018 seg->packets++;
2019 chain->stat.coalesced++;
2020 return RSC_COALESCE;
2021 }
2022}
2023
2024static int32_t virtio_net_rsc_coalesce4(VirtioNetRscChain *chain,
2025 VirtioNetRscSeg *seg,
2026 const uint8_t *buf, size_t size,
2027 VirtioNetRscUnit *unit)
2028{
2029 struct ip_header *ip1, *ip2;
2030
2031 ip1 = (struct ip_header *)(unit->ip);
2032 ip2 = (struct ip_header *)(seg->unit.ip);
2033 if ((ip1->ip_src ^ ip2->ip_src) || (ip1->ip_dst ^ ip2->ip_dst)
2034 || (unit->tcp->th_sport ^ seg->unit.tcp->th_sport)
2035 || (unit->tcp->th_dport ^ seg->unit.tcp->th_dport)) {
2036 chain->stat.no_match++;
2037 return RSC_NO_MATCH;
2038 }
2039
2040 return virtio_net_rsc_coalesce_data(chain, seg, buf, unit);
2041}
2042
2043static int32_t virtio_net_rsc_coalesce6(VirtioNetRscChain *chain,
2044 VirtioNetRscSeg *seg,
2045 const uint8_t *buf, size_t size,
2046 VirtioNetRscUnit *unit)
2047{
2048 struct ip6_header *ip1, *ip2;
2049
2050 ip1 = (struct ip6_header *)(unit->ip);
2051 ip2 = (struct ip6_header *)(seg->unit.ip);
2052 if (memcmp(&ip1->ip6_src, &ip2->ip6_src, sizeof(struct in6_address))
2053 || memcmp(&ip1->ip6_dst, &ip2->ip6_dst, sizeof(struct in6_address))
2054 || (unit->tcp->th_sport ^ seg->unit.tcp->th_sport)
2055 || (unit->tcp->th_dport ^ seg->unit.tcp->th_dport)) {
2056 chain->stat.no_match++;
2057 return RSC_NO_MATCH;
2058 }
2059
2060 return virtio_net_rsc_coalesce_data(chain, seg, buf, unit);
2061}
2062
2063
2064
2065static int virtio_net_rsc_tcp_ctrl_check(VirtioNetRscChain *chain,
2066 struct tcp_header *tcp)
2067{
2068 uint16_t tcp_hdr;
2069 uint16_t tcp_flag;
2070
2071 tcp_flag = htons(tcp->th_offset_flags);
2072 tcp_hdr = (tcp_flag & VIRTIO_NET_TCP_HDR_LENGTH) >> 10;
2073 tcp_flag &= VIRTIO_NET_TCP_FLAG;
2074 if (tcp_flag & TH_SYN) {
2075 chain->stat.tcp_syn++;
2076 return RSC_BYPASS;
2077 }
2078
2079 if (tcp_flag & (TH_FIN | TH_URG | TH_RST | TH_ECE | TH_CWR)) {
2080 chain->stat.tcp_ctrl_drain++;
2081 return RSC_FINAL;
2082 }
2083
2084 if (tcp_hdr > sizeof(struct tcp_header)) {
2085 chain->stat.tcp_all_opt++;
2086 return RSC_FINAL;
2087 }
2088
2089 return RSC_CANDIDATE;
2090}
2091
2092static size_t virtio_net_rsc_do_coalesce(VirtioNetRscChain *chain,
2093 NetClientState *nc,
2094 const uint8_t *buf, size_t size,
2095 VirtioNetRscUnit *unit)
2096{
2097 int ret;
2098 VirtioNetRscSeg *seg, *nseg;
2099
2100 if (QTAILQ_EMPTY(&chain->buffers)) {
2101 chain->stat.empty_cache++;
2102 virtio_net_rsc_cache_buf(chain, nc, buf, size);
2103 timer_mod(chain->drain_timer,
2104 qemu_clock_get_ns(QEMU_CLOCK_HOST) + chain->n->rsc_timeout);
2105 return size;
2106 }
2107
2108 QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, nseg) {
2109 if (chain->proto == ETH_P_IP) {
2110 ret = virtio_net_rsc_coalesce4(chain, seg, buf, size, unit);
2111 } else {
2112 ret = virtio_net_rsc_coalesce6(chain, seg, buf, size, unit);
2113 }
2114
2115 if (ret == RSC_FINAL) {
2116 if (virtio_net_rsc_drain_seg(chain, seg) == 0) {
2117
2118 chain->stat.final_failed++;
2119 return 0;
2120 }
2121
2122
2123 return virtio_net_do_receive(nc, buf, size);
2124 } else if (ret == RSC_NO_MATCH) {
2125 continue;
2126 } else {
2127
2128 seg->is_coalesced = 1;
2129 return size;
2130 }
2131 }
2132
2133 chain->stat.no_match_cache++;
2134 virtio_net_rsc_cache_buf(chain, nc, buf, size);
2135 return size;
2136}
2137
2138
2139static size_t virtio_net_rsc_drain_flow(VirtioNetRscChain *chain,
2140 NetClientState *nc,
2141 const uint8_t *buf, size_t size,
2142 uint16_t ip_start, uint16_t ip_size,
2143 uint16_t tcp_port)
2144{
2145 VirtioNetRscSeg *seg, *nseg;
2146 uint32_t ppair1, ppair2;
2147
2148 ppair1 = *(uint32_t *)(buf + tcp_port);
2149 QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, nseg) {
2150 ppair2 = *(uint32_t *)(seg->buf + tcp_port);
2151 if (memcmp(buf + ip_start, seg->buf + ip_start, ip_size)
2152 || (ppair1 != ppair2)) {
2153 continue;
2154 }
2155 if (virtio_net_rsc_drain_seg(chain, seg) == 0) {
2156 chain->stat.drain_failed++;
2157 }
2158
2159 break;
2160 }
2161
2162 return virtio_net_do_receive(nc, buf, size);
2163}
2164
2165static int32_t virtio_net_rsc_sanity_check4(VirtioNetRscChain *chain,
2166 struct ip_header *ip,
2167 const uint8_t *buf, size_t size)
2168{
2169 uint16_t ip_len;
2170
2171
2172 if (((ip->ip_ver_len & 0xF0) >> 4) != IP_HEADER_VERSION_4) {
2173 chain->stat.ip_option++;
2174 return RSC_BYPASS;
2175 }
2176
2177
2178 if ((ip->ip_ver_len & 0xF) != VIRTIO_NET_IP4_HEADER_LENGTH) {
2179 chain->stat.ip_option++;
2180 return RSC_BYPASS;
2181 }
2182
2183 if (ip->ip_p != IPPROTO_TCP) {
2184 chain->stat.bypass_not_tcp++;
2185 return RSC_BYPASS;
2186 }
2187
2188
2189 if (!(htons(ip->ip_off) & IP_DF)) {
2190 chain->stat.ip_frag++;
2191 return RSC_BYPASS;
2192 }
2193
2194
2195 if (IPTOS_ECN(ip->ip_tos)) {
2196 chain->stat.ip_ecn++;
2197 return RSC_BYPASS;
2198 }
2199
2200 ip_len = htons(ip->ip_len);
2201 if (ip_len < (sizeof(struct ip_header) + sizeof(struct tcp_header))
2202 || ip_len > (size - chain->n->guest_hdr_len -
2203 sizeof(struct eth_header))) {
2204 chain->stat.ip_hacked++;
2205 return RSC_BYPASS;
2206 }
2207
2208 return RSC_CANDIDATE;
2209}
2210
2211static size_t virtio_net_rsc_receive4(VirtioNetRscChain *chain,
2212 NetClientState *nc,
2213 const uint8_t *buf, size_t size)
2214{
2215 int32_t ret;
2216 uint16_t hdr_len;
2217 VirtioNetRscUnit unit;
2218
2219 hdr_len = ((VirtIONet *)(chain->n))->guest_hdr_len;
2220
2221 if (size < (hdr_len + sizeof(struct eth_header) + sizeof(struct ip_header)
2222 + sizeof(struct tcp_header))) {
2223 chain->stat.bypass_not_tcp++;
2224 return virtio_net_do_receive(nc, buf, size);
2225 }
2226
2227 virtio_net_rsc_extract_unit4(chain, buf, &unit);
2228 if (virtio_net_rsc_sanity_check4(chain, unit.ip, buf, size)
2229 != RSC_CANDIDATE) {
2230 return virtio_net_do_receive(nc, buf, size);
2231 }
2232
2233 ret = virtio_net_rsc_tcp_ctrl_check(chain, unit.tcp);
2234 if (ret == RSC_BYPASS) {
2235 return virtio_net_do_receive(nc, buf, size);
2236 } else if (ret == RSC_FINAL) {
2237 return virtio_net_rsc_drain_flow(chain, nc, buf, size,
2238 ((hdr_len + sizeof(struct eth_header)) + 12),
2239 VIRTIO_NET_IP4_ADDR_SIZE,
2240 hdr_len + sizeof(struct eth_header) + sizeof(struct ip_header));
2241 }
2242
2243 return virtio_net_rsc_do_coalesce(chain, nc, buf, size, &unit);
2244}
2245
2246static int32_t virtio_net_rsc_sanity_check6(VirtioNetRscChain *chain,
2247 struct ip6_header *ip6,
2248 const uint8_t *buf, size_t size)
2249{
2250 uint16_t ip_len;
2251
2252 if (((ip6->ip6_ctlun.ip6_un1.ip6_un1_flow & 0xF0) >> 4)
2253 != IP_HEADER_VERSION_6) {
2254 return RSC_BYPASS;
2255 }
2256
2257
2258 if (ip6->ip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_TCP) {
2259 chain->stat.bypass_not_tcp++;
2260 return RSC_BYPASS;
2261 }
2262
2263 ip_len = htons(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen);
2264 if (ip_len < sizeof(struct tcp_header) ||
2265 ip_len > (size - chain->n->guest_hdr_len - sizeof(struct eth_header)
2266 - sizeof(struct ip6_header))) {
2267 chain->stat.ip_hacked++;
2268 return RSC_BYPASS;
2269 }
2270
2271
2272 if (IP6_ECN(ip6->ip6_ctlun.ip6_un3.ip6_un3_ecn)) {
2273 chain->stat.ip_ecn++;
2274 return RSC_BYPASS;
2275 }
2276
2277 return RSC_CANDIDATE;
2278}
2279
2280static size_t virtio_net_rsc_receive6(void *opq, NetClientState *nc,
2281 const uint8_t *buf, size_t size)
2282{
2283 int32_t ret;
2284 uint16_t hdr_len;
2285 VirtioNetRscChain *chain;
2286 VirtioNetRscUnit unit;
2287
2288 chain = (VirtioNetRscChain *)opq;
2289 hdr_len = ((VirtIONet *)(chain->n))->guest_hdr_len;
2290
2291 if (size < (hdr_len + sizeof(struct eth_header) + sizeof(struct ip6_header)
2292 + sizeof(tcp_header))) {
2293 return virtio_net_do_receive(nc, buf, size);
2294 }
2295
2296 virtio_net_rsc_extract_unit6(chain, buf, &unit);
2297 if (RSC_CANDIDATE != virtio_net_rsc_sanity_check6(chain,
2298 unit.ip, buf, size)) {
2299 return virtio_net_do_receive(nc, buf, size);
2300 }
2301
2302 ret = virtio_net_rsc_tcp_ctrl_check(chain, unit.tcp);
2303 if (ret == RSC_BYPASS) {
2304 return virtio_net_do_receive(nc, buf, size);
2305 } else if (ret == RSC_FINAL) {
2306 return virtio_net_rsc_drain_flow(chain, nc, buf, size,
2307 ((hdr_len + sizeof(struct eth_header)) + 8),
2308 VIRTIO_NET_IP6_ADDR_SIZE,
2309 hdr_len + sizeof(struct eth_header)
2310 + sizeof(struct ip6_header));
2311 }
2312
2313 return virtio_net_rsc_do_coalesce(chain, nc, buf, size, &unit);
2314}
2315
2316static VirtioNetRscChain *virtio_net_rsc_lookup_chain(VirtIONet *n,
2317 NetClientState *nc,
2318 uint16_t proto)
2319{
2320 VirtioNetRscChain *chain;
2321
2322 if ((proto != (uint16_t)ETH_P_IP) && (proto != (uint16_t)ETH_P_IPV6)) {
2323 return NULL;
2324 }
2325
2326 QTAILQ_FOREACH(chain, &n->rsc_chains, next) {
2327 if (chain->proto == proto) {
2328 return chain;
2329 }
2330 }
2331
2332 chain = g_malloc(sizeof(*chain));
2333 chain->n = n;
2334 chain->proto = proto;
2335 if (proto == (uint16_t)ETH_P_IP) {
2336 chain->max_payload = VIRTIO_NET_MAX_IP4_PAYLOAD;
2337 chain->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
2338 } else {
2339 chain->max_payload = VIRTIO_NET_MAX_IP6_PAYLOAD;
2340 chain->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
2341 }
2342 chain->drain_timer = timer_new_ns(QEMU_CLOCK_HOST,
2343 virtio_net_rsc_purge, chain);
2344 memset(&chain->stat, 0, sizeof(chain->stat));
2345
2346 QTAILQ_INIT(&chain->buffers);
2347 QTAILQ_INSERT_TAIL(&n->rsc_chains, chain, next);
2348
2349 return chain;
2350}
2351
2352static ssize_t virtio_net_rsc_receive(NetClientState *nc,
2353 const uint8_t *buf,
2354 size_t size)
2355{
2356 uint16_t proto;
2357 VirtioNetRscChain *chain;
2358 struct eth_header *eth;
2359 VirtIONet *n;
2360
2361 n = qemu_get_nic_opaque(nc);
2362 if (size < (n->host_hdr_len + sizeof(struct eth_header))) {
2363 return virtio_net_do_receive(nc, buf, size);
2364 }
2365
2366 eth = (struct eth_header *)(buf + n->guest_hdr_len);
2367 proto = htons(eth->h_proto);
2368
2369 chain = virtio_net_rsc_lookup_chain(n, nc, proto);
2370 if (chain) {
2371 chain->stat.received++;
2372 if (proto == (uint16_t)ETH_P_IP && n->rsc4_enabled) {
2373 return virtio_net_rsc_receive4(chain, nc, buf, size);
2374 } else if (proto == (uint16_t)ETH_P_IPV6 && n->rsc6_enabled) {
2375 return virtio_net_rsc_receive6(chain, nc, buf, size);
2376 }
2377 }
2378 return virtio_net_do_receive(nc, buf, size);
2379}
2380
2381static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf,
2382 size_t size)
2383{
2384 VirtIONet *n = qemu_get_nic_opaque(nc);
2385 if ((n->rsc4_enabled || n->rsc6_enabled)) {
2386 return virtio_net_rsc_receive(nc, buf, size);
2387 } else {
2388 return virtio_net_do_receive(nc, buf, size);
2389 }
2390}
2391
2392static int32_t virtio_net_flush_tx(VirtIONetQueue *q);
2393
2394static void virtio_net_tx_complete(NetClientState *nc, ssize_t len)
2395{
2396 VirtIONet *n = qemu_get_nic_opaque(nc);
2397 VirtIONetQueue *q = virtio_net_get_subqueue(nc);
2398 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2399
2400 virtqueue_push(q->tx_vq, q->async_tx.elem, 0);
2401 virtio_notify(vdev, q->tx_vq);
2402
2403 g_free(q->async_tx.elem);
2404 q->async_tx.elem = NULL;
2405
2406 virtio_queue_set_notification(q->tx_vq, 1);
2407 virtio_net_flush_tx(q);
2408}
2409
2410
2411static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
2412{
2413 VirtIONet *n = q->n;
2414 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2415 VirtQueueElement *elem;
2416 int32_t num_packets = 0;
2417 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
2418 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
2419 return num_packets;
2420 }
2421
2422 if (q->async_tx.elem) {
2423 virtio_queue_set_notification(q->tx_vq, 0);
2424 return num_packets;
2425 }
2426
2427 for (;;) {
2428 ssize_t ret;
2429 unsigned int out_num;
2430 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg;
2431 struct virtio_net_hdr_mrg_rxbuf mhdr;
2432
2433 elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement));
2434 if (!elem) {
2435 break;
2436 }
2437
2438 out_num = elem->out_num;
2439 out_sg = elem->out_sg;
2440 if (out_num < 1) {
2441 virtio_error(vdev, "virtio-net header not in first element");
2442 virtqueue_detach_element(q->tx_vq, elem, 0);
2443 g_free(elem);
2444 return -EINVAL;
2445 }
2446
2447 if (n->has_vnet_hdr) {
2448 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) <
2449 n->guest_hdr_len) {
2450 virtio_error(vdev, "virtio-net header incorrect");
2451 virtqueue_detach_element(q->tx_vq, elem, 0);
2452 g_free(elem);
2453 return -EINVAL;
2454 }
2455 if (n->needs_vnet_hdr_swap) {
2456 virtio_net_hdr_swap(vdev, (void *) &mhdr);
2457 sg2[0].iov_base = &mhdr;
2458 sg2[0].iov_len = n->guest_hdr_len;
2459 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1,
2460 out_sg, out_num,
2461 n->guest_hdr_len, -1);
2462 if (out_num == VIRTQUEUE_MAX_SIZE) {
2463 goto drop;
2464 }
2465 out_num += 1;
2466 out_sg = sg2;
2467 }
2468 }
2469
2470
2471
2472
2473
2474 assert(n->host_hdr_len <= n->guest_hdr_len);
2475 if (n->host_hdr_len != n->guest_hdr_len) {
2476 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg),
2477 out_sg, out_num,
2478 0, n->host_hdr_len);
2479 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num,
2480 out_sg, out_num,
2481 n->guest_hdr_len, -1);
2482 out_num = sg_num;
2483 out_sg = sg;
2484 }
2485
2486 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index),
2487 out_sg, out_num, virtio_net_tx_complete);
2488 if (ret == 0) {
2489 virtio_queue_set_notification(q->tx_vq, 0);
2490 q->async_tx.elem = elem;
2491 return -EBUSY;
2492 }
2493
2494drop:
2495 virtqueue_push(q->tx_vq, elem, 0);
2496 virtio_notify(vdev, q->tx_vq);
2497 g_free(elem);
2498
2499 if (++num_packets >= n->tx_burst) {
2500 break;
2501 }
2502 }
2503 return num_packets;
2504}
2505
2506static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq)
2507{
2508 VirtIONet *n = VIRTIO_NET(vdev);
2509 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))];
2510
2511 if (unlikely((n->status & VIRTIO_NET_S_LINK_UP) == 0)) {
2512 virtio_net_drop_tx_queue_data(vdev, vq);
2513 return;
2514 }
2515
2516
2517 if (!vdev->vm_running) {
2518 q->tx_waiting = 1;
2519 return;
2520 }
2521
2522 if (q->tx_waiting) {
2523 virtio_queue_set_notification(vq, 1);
2524 timer_del(q->tx_timer);
2525 q->tx_waiting = 0;
2526 if (virtio_net_flush_tx(q) == -EINVAL) {
2527 return;
2528 }
2529 } else {
2530 timer_mod(q->tx_timer,
2531 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout);
2532 q->tx_waiting = 1;
2533 virtio_queue_set_notification(vq, 0);
2534 }
2535}
2536
2537static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq)
2538{
2539 VirtIONet *n = VIRTIO_NET(vdev);
2540 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))];
2541
2542 if (unlikely((n->status & VIRTIO_NET_S_LINK_UP) == 0)) {
2543 virtio_net_drop_tx_queue_data(vdev, vq);
2544 return;
2545 }
2546
2547 if (unlikely(q->tx_waiting)) {
2548 return;
2549 }
2550 q->tx_waiting = 1;
2551
2552 if (!vdev->vm_running) {
2553 return;
2554 }
2555 virtio_queue_set_notification(vq, 0);
2556 qemu_bh_schedule(q->tx_bh);
2557}
2558
2559static void virtio_net_tx_timer(void *opaque)
2560{
2561 VirtIONetQueue *q = opaque;
2562 VirtIONet *n = q->n;
2563 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2564
2565 if (!vdev->vm_running) {
2566
2567 assert(q->tx_waiting);
2568 return;
2569 }
2570
2571 q->tx_waiting = 0;
2572
2573
2574 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
2575 return;
2576 }
2577
2578 virtio_queue_set_notification(q->tx_vq, 1);
2579 virtio_net_flush_tx(q);
2580}
2581
2582static void virtio_net_tx_bh(void *opaque)
2583{
2584 VirtIONetQueue *q = opaque;
2585 VirtIONet *n = q->n;
2586 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2587 int32_t ret;
2588
2589
2590 if (!vdev->vm_running) {
2591
2592 assert(q->tx_waiting);
2593 return;
2594 }
2595
2596 q->tx_waiting = 0;
2597
2598
2599 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) {
2600 return;
2601 }
2602
2603 ret = virtio_net_flush_tx(q);
2604 if (ret == -EBUSY || ret == -EINVAL) {
2605 return;
2606
2607 }
2608
2609
2610
2611 if (ret >= n->tx_burst) {
2612 qemu_bh_schedule(q->tx_bh);
2613 q->tx_waiting = 1;
2614 return;
2615 }
2616
2617
2618
2619
2620 virtio_queue_set_notification(q->tx_vq, 1);
2621 ret = virtio_net_flush_tx(q);
2622 if (ret == -EINVAL) {
2623 return;
2624 } else if (ret > 0) {
2625 virtio_queue_set_notification(q->tx_vq, 0);
2626 qemu_bh_schedule(q->tx_bh);
2627 q->tx_waiting = 1;
2628 }
2629}
2630
2631static void virtio_net_add_queue(VirtIONet *n, int index)
2632{
2633 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2634
2635 n->vqs[index].rx_vq = virtio_add_queue(vdev, n->net_conf.rx_queue_size,
2636 virtio_net_handle_rx);
2637
2638 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) {
2639 n->vqs[index].tx_vq =
2640 virtio_add_queue(vdev, n->net_conf.tx_queue_size,
2641 virtio_net_handle_tx_timer);
2642 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
2643 virtio_net_tx_timer,
2644 &n->vqs[index]);
2645 } else {
2646 n->vqs[index].tx_vq =
2647 virtio_add_queue(vdev, n->net_conf.tx_queue_size,
2648 virtio_net_handle_tx_bh);
2649 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]);
2650 }
2651
2652 n->vqs[index].tx_waiting = 0;
2653 n->vqs[index].n = n;
2654}
2655
2656static void virtio_net_del_queue(VirtIONet *n, int index)
2657{
2658 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2659 VirtIONetQueue *q = &n->vqs[index];
2660 NetClientState *nc = qemu_get_subqueue(n->nic, index);
2661
2662 qemu_purge_queued_packets(nc);
2663
2664 virtio_del_queue(vdev, index * 2);
2665 if (q->tx_timer) {
2666 timer_del(q->tx_timer);
2667 timer_free(q->tx_timer);
2668 q->tx_timer = NULL;
2669 } else {
2670 qemu_bh_delete(q->tx_bh);
2671 q->tx_bh = NULL;
2672 }
2673 q->tx_waiting = 0;
2674 virtio_del_queue(vdev, index * 2 + 1);
2675}
2676
2677static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues)
2678{
2679 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2680 int old_num_queues = virtio_get_num_queues(vdev);
2681 int new_num_queues = new_max_queues * 2 + 1;
2682 int i;
2683
2684 assert(old_num_queues >= 3);
2685 assert(old_num_queues % 2 == 1);
2686
2687 if (old_num_queues == new_num_queues) {
2688 return;
2689 }
2690
2691
2692
2693
2694
2695
2696 virtio_del_queue(vdev, old_num_queues - 1);
2697
2698 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) {
2699
2700 virtio_net_del_queue(n, i / 2);
2701 }
2702
2703 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) {
2704
2705 virtio_net_add_queue(n, i / 2);
2706 }
2707
2708
2709 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
2710}
2711
2712static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue)
2713{
2714 int max = multiqueue ? n->max_queues : 1;
2715
2716 n->multiqueue = multiqueue;
2717 virtio_net_change_num_queues(n, max);
2718
2719 virtio_net_set_queues(n);
2720}
2721
2722static int virtio_net_post_load_device(void *opaque, int version_id)
2723{
2724 VirtIONet *n = opaque;
2725 VirtIODevice *vdev = VIRTIO_DEVICE(n);
2726 int i, link_down;
2727
2728 trace_virtio_net_post_load_device();
2729 virtio_net_set_mrg_rx_bufs(n, n->mergeable_rx_bufs,
2730 virtio_vdev_has_feature(vdev,
2731 VIRTIO_F_VERSION_1),
2732 virtio_vdev_has_feature(vdev,
2733 VIRTIO_NET_F_HASH_REPORT));
2734
2735
2736 if (n->mac_table.in_use > MAC_TABLE_ENTRIES) {
2737 n->mac_table.in_use = 0;
2738 }
2739
2740 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
2741 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n);
2742 }
2743
2744
2745
2746
2747
2748
2749
2750 n->saved_guest_offloads = n->curr_guest_offloads;
2751
2752 virtio_net_set_queues(n);
2753
2754
2755 for (i = 0; i < n->mac_table.in_use; i++) {
2756 if (n->mac_table.macs[i * ETH_ALEN] & 1) {
2757 break;
2758 }
2759 }
2760 n->mac_table.first_multi = i;
2761
2762
2763
2764 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0;
2765 for (i = 0; i < n->max_queues; i++) {
2766 qemu_get_subqueue(n->nic, i)->link_down = link_down;
2767 }
2768
2769 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) &&
2770 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) {
2771 qemu_announce_timer_reset(&n->announce_timer, migrate_announce_params(),
2772 QEMU_CLOCK_VIRTUAL,
2773 virtio_net_announce_timer, n);
2774 if (n->announce_timer.round) {
2775 timer_mod(n->announce_timer.tm,
2776 qemu_clock_get_ms(n->announce_timer.type));
2777 } else {
2778 qemu_announce_timer_del(&n->announce_timer, false);
2779 }
2780 }
2781
2782 if (n->rss_data.enabled) {
2783 trace_virtio_net_rss_enable(n->rss_data.hash_types,
2784 n->rss_data.indirections_len,
2785 sizeof(n->rss_data.key));
2786 } else {
2787 trace_virtio_net_rss_disable();
2788 }
2789 return 0;
2790}
2791
2792static int virtio_net_post_load_virtio(VirtIODevice *vdev)
2793{
2794 VirtIONet *n = VIRTIO_NET(vdev);
2795
2796
2797
2798
2799
2800 n->curr_guest_offloads = n->saved_guest_offloads;
2801 if (peer_has_vnet_hdr(n)) {
2802 virtio_net_apply_guest_offloads(n);
2803 }
2804
2805 return 0;
2806}
2807
2808
2809static const VMStateDescription vmstate_virtio_net_queue_tx_waiting = {
2810 .name = "virtio-net-queue-tx_waiting",
2811 .fields = (VMStateField[]) {
2812 VMSTATE_UINT32(tx_waiting, VirtIONetQueue),
2813 VMSTATE_END_OF_LIST()
2814 },
2815};
2816
2817static bool max_queues_gt_1(void *opaque, int version_id)
2818{
2819 return VIRTIO_NET(opaque)->max_queues > 1;
2820}
2821
2822static bool has_ctrl_guest_offloads(void *opaque, int version_id)
2823{
2824 return virtio_vdev_has_feature(VIRTIO_DEVICE(opaque),
2825 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS);
2826}
2827
2828static bool mac_table_fits(void *opaque, int version_id)
2829{
2830 return VIRTIO_NET(opaque)->mac_table.in_use <= MAC_TABLE_ENTRIES;
2831}
2832
2833static bool mac_table_doesnt_fit(void *opaque, int version_id)
2834{
2835 return !mac_table_fits(opaque, version_id);
2836}
2837
2838
2839
2840
2841struct VirtIONetMigTmp {
2842 VirtIONet *parent;
2843 VirtIONetQueue *vqs_1;
2844 uint16_t curr_queues_1;
2845 uint8_t has_ufo;
2846 uint32_t has_vnet_hdr;
2847};
2848
2849
2850
2851
2852
2853
2854
2855static int virtio_net_tx_waiting_pre_save(void *opaque)
2856{
2857 struct VirtIONetMigTmp *tmp = opaque;
2858
2859 tmp->vqs_1 = tmp->parent->vqs + 1;
2860 tmp->curr_queues_1 = tmp->parent->curr_queues - 1;
2861 if (tmp->parent->curr_queues == 0) {
2862 tmp->curr_queues_1 = 0;
2863 }
2864
2865 return 0;
2866}
2867
2868static int virtio_net_tx_waiting_pre_load(void *opaque)
2869{
2870 struct VirtIONetMigTmp *tmp = opaque;
2871
2872
2873 virtio_net_tx_waiting_pre_save(opaque);
2874
2875 if (tmp->parent->curr_queues > tmp->parent->max_queues) {
2876 error_report("virtio-net: curr_queues %x > max_queues %x",
2877 tmp->parent->curr_queues, tmp->parent->max_queues);
2878
2879 return -EINVAL;
2880 }
2881
2882 return 0;
2883}
2884
2885static const VMStateDescription vmstate_virtio_net_tx_waiting = {
2886 .name = "virtio-net-tx_waiting",
2887 .pre_load = virtio_net_tx_waiting_pre_load,
2888 .pre_save = virtio_net_tx_waiting_pre_save,
2889 .fields = (VMStateField[]) {
2890 VMSTATE_STRUCT_VARRAY_POINTER_UINT16(vqs_1, struct VirtIONetMigTmp,
2891 curr_queues_1,
2892 vmstate_virtio_net_queue_tx_waiting,
2893 struct VirtIONetQueue),
2894 VMSTATE_END_OF_LIST()
2895 },
2896};
2897
2898
2899
2900
2901static int virtio_net_ufo_post_load(void *opaque, int version_id)
2902{
2903 struct VirtIONetMigTmp *tmp = opaque;
2904
2905 if (tmp->has_ufo && !peer_has_ufo(tmp->parent)) {
2906 error_report("virtio-net: saved image requires TUN_F_UFO support");
2907 return -EINVAL;
2908 }
2909
2910 return 0;
2911}
2912
2913static int virtio_net_ufo_pre_save(void *opaque)
2914{
2915 struct VirtIONetMigTmp *tmp = opaque;
2916
2917 tmp->has_ufo = tmp->parent->has_ufo;
2918
2919 return 0;
2920}
2921
2922static const VMStateDescription vmstate_virtio_net_has_ufo = {
2923 .name = "virtio-net-ufo",
2924 .post_load = virtio_net_ufo_post_load,
2925 .pre_save = virtio_net_ufo_pre_save,
2926 .fields = (VMStateField[]) {
2927 VMSTATE_UINT8(has_ufo, struct VirtIONetMigTmp),
2928 VMSTATE_END_OF_LIST()
2929 },
2930};
2931
2932
2933
2934
2935static int virtio_net_vnet_post_load(void *opaque, int version_id)
2936{
2937 struct VirtIONetMigTmp *tmp = opaque;
2938
2939 if (tmp->has_vnet_hdr && !peer_has_vnet_hdr(tmp->parent)) {
2940 error_report("virtio-net: saved image requires vnet_hdr=on");
2941 return -EINVAL;
2942 }
2943
2944 return 0;
2945}
2946
2947static int virtio_net_vnet_pre_save(void *opaque)
2948{
2949 struct VirtIONetMigTmp *tmp = opaque;
2950
2951 tmp->has_vnet_hdr = tmp->parent->has_vnet_hdr;
2952
2953 return 0;
2954}
2955
2956static const VMStateDescription vmstate_virtio_net_has_vnet = {
2957 .name = "virtio-net-vnet",
2958 .post_load = virtio_net_vnet_post_load,
2959 .pre_save = virtio_net_vnet_pre_save,
2960 .fields = (VMStateField[]) {
2961 VMSTATE_UINT32(has_vnet_hdr, struct VirtIONetMigTmp),
2962 VMSTATE_END_OF_LIST()
2963 },
2964};
2965
2966static bool virtio_net_rss_needed(void *opaque)
2967{
2968 return VIRTIO_NET(opaque)->rss_data.enabled;
2969}
2970
2971static const VMStateDescription vmstate_virtio_net_rss = {
2972 .name = "virtio-net-device/rss",
2973 .version_id = 1,
2974 .minimum_version_id = 1,
2975 .needed = virtio_net_rss_needed,
2976 .fields = (VMStateField[]) {
2977 VMSTATE_BOOL(rss_data.enabled, VirtIONet),
2978 VMSTATE_BOOL(rss_data.redirect, VirtIONet),
2979 VMSTATE_BOOL(rss_data.populate_hash, VirtIONet),
2980 VMSTATE_UINT32(rss_data.hash_types, VirtIONet),
2981 VMSTATE_UINT16(rss_data.indirections_len, VirtIONet),
2982 VMSTATE_UINT16(rss_data.default_queue, VirtIONet),
2983 VMSTATE_UINT8_ARRAY(rss_data.key, VirtIONet,
2984 VIRTIO_NET_RSS_MAX_KEY_SIZE),
2985 VMSTATE_VARRAY_UINT16_ALLOC(rss_data.indirections_table, VirtIONet,
2986 rss_data.indirections_len, 0,
2987 vmstate_info_uint16, uint16_t),
2988 VMSTATE_END_OF_LIST()
2989 },
2990};
2991
2992static const VMStateDescription vmstate_virtio_net_device = {
2993 .name = "virtio-net-device",
2994 .version_id = VIRTIO_NET_VM_VERSION,
2995 .minimum_version_id = VIRTIO_NET_VM_VERSION,
2996 .post_load = virtio_net_post_load_device,
2997 .fields = (VMStateField[]) {
2998 VMSTATE_UINT8_ARRAY(mac, VirtIONet, ETH_ALEN),
2999 VMSTATE_STRUCT_POINTER(vqs, VirtIONet,
3000 vmstate_virtio_net_queue_tx_waiting,
3001 VirtIONetQueue),
3002 VMSTATE_UINT32(mergeable_rx_bufs, VirtIONet),
3003 VMSTATE_UINT16(status, VirtIONet),
3004 VMSTATE_UINT8(promisc, VirtIONet),
3005 VMSTATE_UINT8(allmulti, VirtIONet),
3006 VMSTATE_UINT32(mac_table.in_use, VirtIONet),
3007
3008
3009
3010
3011
3012 VMSTATE_VBUFFER_MULTIPLY(mac_table.macs, VirtIONet,
3013 0, mac_table_fits, mac_table.in_use,
3014 ETH_ALEN),
3015 VMSTATE_UNUSED_VARRAY_UINT32(VirtIONet, mac_table_doesnt_fit, 0,
3016 mac_table.in_use, ETH_ALEN),
3017
3018
3019
3020
3021
3022 VMSTATE_BUFFER_POINTER_UNSAFE(vlans, VirtIONet, 0, MAX_VLAN >> 3),
3023 VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp,
3024 vmstate_virtio_net_has_vnet),
3025 VMSTATE_UINT8(mac_table.multi_overflow, VirtIONet),
3026 VMSTATE_UINT8(mac_table.uni_overflow, VirtIONet),
3027 VMSTATE_UINT8(alluni, VirtIONet),
3028 VMSTATE_UINT8(nomulti, VirtIONet),
3029 VMSTATE_UINT8(nouni, VirtIONet),
3030 VMSTATE_UINT8(nobcast, VirtIONet),
3031 VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp,
3032 vmstate_virtio_net_has_ufo),
3033 VMSTATE_SINGLE_TEST(max_queues, VirtIONet, max_queues_gt_1, 0,
3034 vmstate_info_uint16_equal, uint16_t),
3035 VMSTATE_UINT16_TEST(curr_queues, VirtIONet, max_queues_gt_1),
3036 VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp,
3037 vmstate_virtio_net_tx_waiting),
3038 VMSTATE_UINT64_TEST(curr_guest_offloads, VirtIONet,
3039 has_ctrl_guest_offloads),
3040 VMSTATE_END_OF_LIST()
3041 },
3042 .subsections = (const VMStateDescription * []) {
3043 &vmstate_virtio_net_rss,
3044 NULL
3045 }
3046};
3047
3048static NetClientInfo net_virtio_info = {
3049 .type = NET_CLIENT_DRIVER_NIC,
3050 .size = sizeof(NICState),
3051 .can_receive = virtio_net_can_receive,
3052 .receive = virtio_net_receive,
3053 .link_status_changed = virtio_net_set_link_status,
3054 .query_rx_filter = virtio_net_query_rxfilter,
3055 .announce = virtio_net_announce,
3056};
3057
3058static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx)
3059{
3060 VirtIONet *n = VIRTIO_NET(vdev);
3061 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
3062 assert(n->vhost_started);
3063 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx);
3064}
3065
3066static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx,
3067 bool mask)
3068{
3069 VirtIONet *n = VIRTIO_NET(vdev);
3070 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
3071 assert(n->vhost_started);
3072 vhost_net_virtqueue_mask(get_vhost_net(nc->peer),
3073 vdev, idx, mask);
3074}
3075
3076static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features)
3077{
3078 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC);
3079
3080 n->config_size = virtio_feature_get_config_size(feature_sizes,
3081 host_features);
3082}
3083
3084void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
3085 const char *type)
3086{
3087
3088
3089
3090 assert(type != NULL);
3091
3092 g_free(n->netclient_name);
3093 g_free(n->netclient_type);
3094 n->netclient_name = g_strdup(name);
3095 n->netclient_type = g_strdup(type);
3096}
3097
3098static bool failover_unplug_primary(VirtIONet *n)
3099{
3100 HotplugHandler *hotplug_ctrl;
3101 PCIDevice *pci_dev;
3102 Error *err = NULL;
3103
3104 hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
3105 if (hotplug_ctrl) {
3106 pci_dev = PCI_DEVICE(n->primary_dev);
3107 pci_dev->partially_hotplugged = true;
3108 hotplug_handler_unplug_request(hotplug_ctrl, n->primary_dev, &err);
3109 if (err) {
3110 error_report_err(err);
3111 return false;
3112 }
3113 } else {
3114 return false;
3115 }
3116 return true;
3117}
3118
3119static bool failover_replug_primary(VirtIONet *n, Error **errp)
3120{
3121 Error *err = NULL;
3122 HotplugHandler *hotplug_ctrl;
3123 PCIDevice *pdev = PCI_DEVICE(n->primary_dev);
3124
3125 if (!pdev->partially_hotplugged) {
3126 return true;
3127 }
3128 if (!n->primary_device_opts) {
3129 n->primary_device_opts = qemu_opts_from_qdict(
3130 qemu_find_opts("device"),
3131 n->primary_device_dict, errp);
3132 if (!n->primary_device_opts) {
3133 return false;
3134 }
3135 }
3136 n->primary_bus = n->primary_dev->parent_bus;
3137 if (!n->primary_bus) {
3138 error_setg(errp, "virtio_net: couldn't find primary bus");
3139 return false;
3140 }
3141 qdev_set_parent_bus(n->primary_dev, n->primary_bus, &error_abort);
3142 n->primary_should_be_hidden = false;
3143 if (!qemu_opt_set_bool(n->primary_device_opts,
3144 "partially_hotplugged", true, errp)) {
3145 return false;
3146 }
3147 hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
3148 if (hotplug_ctrl) {
3149 hotplug_handler_pre_plug(hotplug_ctrl, n->primary_dev, &err);
3150 if (err) {
3151 goto out;
3152 }
3153 hotplug_handler_plug(hotplug_ctrl, n->primary_dev, &err);
3154 }
3155
3156out:
3157 error_propagate(errp, err);
3158 return !err;
3159}
3160
3161static void virtio_net_handle_migration_primary(VirtIONet *n,
3162 MigrationState *s)
3163{
3164 bool should_be_hidden;
3165 Error *err = NULL;
3166
3167 should_be_hidden = qatomic_read(&n->primary_should_be_hidden);
3168
3169 if (!n->primary_dev) {
3170 n->primary_dev = virtio_connect_failover_devices(n, n->qdev, &err);
3171 if (!n->primary_dev) {
3172 return;
3173 }
3174 }
3175
3176 if (migration_in_setup(s) && !should_be_hidden) {
3177 if (failover_unplug_primary(n)) {
3178 vmstate_unregister(VMSTATE_IF(n->primary_dev),
3179 qdev_get_vmsd(n->primary_dev),
3180 n->primary_dev);
3181 qapi_event_send_unplug_primary(n->primary_device_id);
3182 qatomic_set(&n->primary_should_be_hidden, true);
3183 } else {
3184 warn_report("couldn't unplug primary device");
3185 }
3186 } else if (migration_has_failed(s)) {
3187
3188 if (!failover_replug_primary(n, &err)) {
3189 if (err) {
3190 error_report_err(err);
3191 }
3192 }
3193 }
3194}
3195
3196static void virtio_net_migration_state_notifier(Notifier *notifier, void *data)
3197{
3198 MigrationState *s = data;
3199 VirtIONet *n = container_of(notifier, VirtIONet, migration_state);
3200 virtio_net_handle_migration_primary(n, s);
3201}
3202
3203static int virtio_net_primary_should_be_hidden(DeviceListener *listener,
3204 QemuOpts *device_opts)
3205{
3206 VirtIONet *n = container_of(listener, VirtIONet, primary_listener);
3207 bool match_found = false;
3208 bool hide = false;
3209
3210 if (!device_opts) {
3211 return -1;
3212 }
3213 n->primary_device_dict = qemu_opts_to_qdict(device_opts,
3214 n->primary_device_dict);
3215 if (n->primary_device_dict) {
3216 g_free(n->standby_id);
3217 n->standby_id = g_strdup(qdict_get_try_str(n->primary_device_dict,
3218 "failover_pair_id"));
3219 }
3220 if (g_strcmp0(n->standby_id, n->netclient_name) == 0) {
3221 match_found = true;
3222 } else {
3223 match_found = false;
3224 hide = false;
3225 g_free(n->standby_id);
3226 n->primary_device_dict = NULL;
3227 goto out;
3228 }
3229
3230 n->primary_device_opts = device_opts;
3231
3232
3233 hide = qatomic_read(&n->primary_should_be_hidden);
3234
3235 if (n->primary_device_dict) {
3236 g_free(n->primary_device_id);
3237 n->primary_device_id = g_strdup(qdict_get_try_str(
3238 n->primary_device_dict, "id"));
3239 if (!n->primary_device_id) {
3240 warn_report("primary_device_id not set");
3241 }
3242 }
3243
3244out:
3245 if (match_found && hide) {
3246 return 1;
3247 } else if (match_found && !hide) {
3248 return 0;
3249 } else {
3250 return -1;
3251 }
3252}
3253
3254static void virtio_net_device_realize(DeviceState *dev, Error **errp)
3255{
3256 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
3257 VirtIONet *n = VIRTIO_NET(dev);
3258 NetClientState *nc;
3259 int i;
3260
3261 if (n->net_conf.mtu) {
3262 n->host_features |= (1ULL << VIRTIO_NET_F_MTU);
3263 }
3264
3265 if (n->net_conf.duplex_str) {
3266 if (strncmp(n->net_conf.duplex_str, "half", 5) == 0) {
3267 n->net_conf.duplex = DUPLEX_HALF;
3268 } else if (strncmp(n->net_conf.duplex_str, "full", 5) == 0) {
3269 n->net_conf.duplex = DUPLEX_FULL;
3270 } else {
3271 error_setg(errp, "'duplex' must be 'half' or 'full'");
3272 return;
3273 }
3274 n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX);
3275 } else {
3276 n->net_conf.duplex = DUPLEX_UNKNOWN;
3277 }
3278
3279 if (n->net_conf.speed < SPEED_UNKNOWN) {
3280 error_setg(errp, "'speed' must be between 0 and INT_MAX");
3281 return;
3282 }
3283 if (n->net_conf.speed >= 0) {
3284 n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX);
3285 }
3286
3287 if (n->failover) {
3288 n->primary_listener.should_be_hidden =
3289 virtio_net_primary_should_be_hidden;
3290 qatomic_set(&n->primary_should_be_hidden, true);
3291 device_listener_register(&n->primary_listener);
3292 n->migration_state.notify = virtio_net_migration_state_notifier;
3293 add_migration_state_change_notifier(&n->migration_state);
3294 n->host_features |= (1ULL << VIRTIO_NET_F_STANDBY);
3295 }
3296
3297 virtio_net_set_config_size(n, n->host_features);
3298 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
3299
3300
3301
3302
3303
3304
3305 if (n->net_conf.rx_queue_size < VIRTIO_NET_RX_QUEUE_MIN_SIZE ||
3306 n->net_conf.rx_queue_size > VIRTQUEUE_MAX_SIZE ||
3307 !is_power_of_2(n->net_conf.rx_queue_size)) {
3308 error_setg(errp, "Invalid rx_queue_size (= %" PRIu16 "), "
3309 "must be a power of 2 between %d and %d.",
3310 n->net_conf.rx_queue_size, VIRTIO_NET_RX_QUEUE_MIN_SIZE,
3311 VIRTQUEUE_MAX_SIZE);
3312 virtio_cleanup(vdev);
3313 return;
3314 }
3315
3316 if (n->net_conf.tx_queue_size < VIRTIO_NET_TX_QUEUE_MIN_SIZE ||
3317 n->net_conf.tx_queue_size > VIRTQUEUE_MAX_SIZE ||
3318 !is_power_of_2(n->net_conf.tx_queue_size)) {
3319 error_setg(errp, "Invalid tx_queue_size (= %" PRIu16 "), "
3320 "must be a power of 2 between %d and %d",
3321 n->net_conf.tx_queue_size, VIRTIO_NET_TX_QUEUE_MIN_SIZE,
3322 VIRTQUEUE_MAX_SIZE);
3323 virtio_cleanup(vdev);
3324 return;
3325 }
3326
3327 n->max_queues = MAX(n->nic_conf.peers.queues, 1);
3328 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) {
3329 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
3330 "must be a positive integer less than %d.",
3331 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2);
3332 virtio_cleanup(vdev);
3333 return;
3334 }
3335 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues);
3336 n->curr_queues = 1;
3337 n->tx_timeout = n->net_conf.txtimer;
3338
3339 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer")
3340 && strcmp(n->net_conf.tx, "bh")) {
3341 warn_report("virtio-net: "
3342 "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
3343 n->net_conf.tx);
3344 error_printf("Defaulting to \"bh\"");
3345 }
3346
3347 n->net_conf.tx_queue_size = MIN(virtio_net_max_tx_queue_size(n),
3348 n->net_conf.tx_queue_size);
3349
3350 for (i = 0; i < n->max_queues; i++) {
3351 virtio_net_add_queue(n, i);
3352 }
3353
3354 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
3355 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr);
3356 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac));
3357 n->status = VIRTIO_NET_S_LINK_UP;
3358 qemu_announce_timer_reset(&n->announce_timer, migrate_announce_params(),
3359 QEMU_CLOCK_VIRTUAL,
3360 virtio_net_announce_timer, n);
3361 n->announce_timer.round = 0;
3362
3363 if (n->netclient_type) {
3364
3365
3366
3367 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf,
3368 n->netclient_type, n->netclient_name, n);
3369 } else {
3370 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf,
3371 object_get_typename(OBJECT(dev)), dev->id, n);
3372 }
3373
3374 peer_test_vnet_hdr(n);
3375 if (peer_has_vnet_hdr(n)) {
3376 for (i = 0; i < n->max_queues; i++) {
3377 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true);
3378 }
3379 n->host_hdr_len = sizeof(struct virtio_net_hdr);
3380 } else {
3381 n->host_hdr_len = 0;
3382 }
3383
3384 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a);
3385
3386 n->vqs[0].tx_waiting = 0;
3387 n->tx_burst = n->net_conf.txburst;
3388 virtio_net_set_mrg_rx_bufs(n, 0, 0, 0);
3389 n->promisc = 1;
3390
3391 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN);
3392
3393 n->vlans = g_malloc0(MAX_VLAN >> 3);
3394
3395 nc = qemu_get_queue(n->nic);
3396 nc->rxfilter_notify_enabled = 1;
3397
3398 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_VDPA) {
3399 struct virtio_net_config netcfg = {};
3400 memcpy(&netcfg.mac, &n->nic_conf.macaddr, ETH_ALEN);
3401 vhost_net_set_config(get_vhost_net(nc->peer),
3402 (uint8_t *)&netcfg, 0, ETH_ALEN, VHOST_SET_CONFIG_TYPE_MASTER);
3403 }
3404 QTAILQ_INIT(&n->rsc_chains);
3405 n->qdev = dev;
3406
3407 net_rx_pkt_init(&n->rx_pkt, false);
3408}
3409
3410static void virtio_net_device_unrealize(DeviceState *dev)
3411{
3412 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
3413 VirtIONet *n = VIRTIO_NET(dev);
3414 int i, max_queues;
3415
3416
3417 virtio_net_set_status(vdev, 0);
3418
3419 g_free(n->netclient_name);
3420 n->netclient_name = NULL;
3421 g_free(n->netclient_type);
3422 n->netclient_type = NULL;
3423
3424 g_free(n->mac_table.macs);
3425 g_free(n->vlans);
3426
3427 if (n->failover) {
3428 device_listener_unregister(&n->primary_listener);
3429 g_free(n->primary_device_id);
3430 g_free(n->standby_id);
3431 qobject_unref(n->primary_device_dict);
3432 n->primary_device_dict = NULL;
3433 }
3434
3435 max_queues = n->multiqueue ? n->max_queues : 1;
3436 for (i = 0; i < max_queues; i++) {
3437 virtio_net_del_queue(n, i);
3438 }
3439
3440 virtio_del_queue(vdev, max_queues * 2);
3441 qemu_announce_timer_del(&n->announce_timer, false);
3442 g_free(n->vqs);
3443 qemu_del_nic(n->nic);
3444 virtio_net_rsc_cleanup(n);
3445 g_free(n->rss_data.indirections_table);
3446 net_rx_pkt_uninit(n->rx_pkt);
3447 virtio_cleanup(vdev);
3448}
3449
3450static void virtio_net_instance_init(Object *obj)
3451{
3452 VirtIONet *n = VIRTIO_NET(obj);
3453
3454
3455
3456
3457
3458 n->config_size = sizeof(struct virtio_net_config);
3459 device_add_bootindex_property(obj, &n->nic_conf.bootindex,
3460 "bootindex", "/ethernet-phy@0",
3461 DEVICE(n));
3462}
3463
3464static int virtio_net_pre_save(void *opaque)
3465{
3466 VirtIONet *n = opaque;
3467
3468
3469
3470 assert(!n->vhost_started);
3471
3472 return 0;
3473}
3474
3475static bool primary_unplug_pending(void *opaque)
3476{
3477 DeviceState *dev = opaque;
3478 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
3479 VirtIONet *n = VIRTIO_NET(vdev);
3480
3481 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_STANDBY)) {
3482 return false;
3483 }
3484 return n->primary_dev ? n->primary_dev->pending_deleted_event : false;
3485}
3486
3487static bool dev_unplug_pending(void *opaque)
3488{
3489 DeviceState *dev = opaque;
3490 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(dev);
3491
3492 return vdc->primary_unplug_pending(dev);
3493}
3494
3495static const VMStateDescription vmstate_virtio_net = {
3496 .name = "virtio-net",
3497 .minimum_version_id = VIRTIO_NET_VM_VERSION,
3498 .version_id = VIRTIO_NET_VM_VERSION,
3499 .fields = (VMStateField[]) {
3500 VMSTATE_VIRTIO_DEVICE,
3501 VMSTATE_END_OF_LIST()
3502 },
3503 .pre_save = virtio_net_pre_save,
3504 .dev_unplug_pending = dev_unplug_pending,
3505};
3506
3507static Property virtio_net_properties[] = {
3508 DEFINE_PROP_BIT64("csum", VirtIONet, host_features,
3509 VIRTIO_NET_F_CSUM, true),
3510 DEFINE_PROP_BIT64("guest_csum", VirtIONet, host_features,
3511 VIRTIO_NET_F_GUEST_CSUM, true),
3512 DEFINE_PROP_BIT64("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true),
3513 DEFINE_PROP_BIT64("guest_tso4", VirtIONet, host_features,
3514 VIRTIO_NET_F_GUEST_TSO4, true),
3515 DEFINE_PROP_BIT64("guest_tso6", VirtIONet, host_features,
3516 VIRTIO_NET_F_GUEST_TSO6, true),
3517 DEFINE_PROP_BIT64("guest_ecn", VirtIONet, host_features,
3518 VIRTIO_NET_F_GUEST_ECN, true),
3519 DEFINE_PROP_BIT64("guest_ufo", VirtIONet, host_features,
3520 VIRTIO_NET_F_GUEST_UFO, true),
3521 DEFINE_PROP_BIT64("guest_announce", VirtIONet, host_features,
3522 VIRTIO_NET_F_GUEST_ANNOUNCE, true),
3523 DEFINE_PROP_BIT64("host_tso4", VirtIONet, host_features,
3524 VIRTIO_NET_F_HOST_TSO4, true),
3525 DEFINE_PROP_BIT64("host_tso6", VirtIONet, host_features,
3526 VIRTIO_NET_F_HOST_TSO6, true),
3527 DEFINE_PROP_BIT64("host_ecn", VirtIONet, host_features,
3528 VIRTIO_NET_F_HOST_ECN, true),
3529 DEFINE_PROP_BIT64("host_ufo", VirtIONet, host_features,
3530 VIRTIO_NET_F_HOST_UFO, true),
3531 DEFINE_PROP_BIT64("mrg_rxbuf", VirtIONet, host_features,
3532 VIRTIO_NET_F_MRG_RXBUF, true),
3533 DEFINE_PROP_BIT64("status", VirtIONet, host_features,
3534 VIRTIO_NET_F_STATUS, true),
3535 DEFINE_PROP_BIT64("ctrl_vq", VirtIONet, host_features,
3536 VIRTIO_NET_F_CTRL_VQ, true),
3537 DEFINE_PROP_BIT64("ctrl_rx", VirtIONet, host_features,
3538 VIRTIO_NET_F_CTRL_RX, true),
3539 DEFINE_PROP_BIT64("ctrl_vlan", VirtIONet, host_features,
3540 VIRTIO_NET_F_CTRL_VLAN, true),
3541 DEFINE_PROP_BIT64("ctrl_rx_extra", VirtIONet, host_features,
3542 VIRTIO_NET_F_CTRL_RX_EXTRA, true),
3543 DEFINE_PROP_BIT64("ctrl_mac_addr", VirtIONet, host_features,
3544 VIRTIO_NET_F_CTRL_MAC_ADDR, true),
3545 DEFINE_PROP_BIT64("ctrl_guest_offloads", VirtIONet, host_features,
3546 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true),
3547 DEFINE_PROP_BIT64("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false),
3548 DEFINE_PROP_BIT64("rss", VirtIONet, host_features,
3549 VIRTIO_NET_F_RSS, false),
3550 DEFINE_PROP_BIT64("hash", VirtIONet, host_features,
3551 VIRTIO_NET_F_HASH_REPORT, false),
3552 DEFINE_PROP_BIT64("guest_rsc_ext", VirtIONet, host_features,
3553 VIRTIO_NET_F_RSC_EXT, false),
3554 DEFINE_PROP_UINT32("rsc_interval", VirtIONet, rsc_timeout,
3555 VIRTIO_NET_RSC_DEFAULT_INTERVAL),
3556 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf),
3557 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer,
3558 TX_TIMER_INTERVAL),
3559 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST),
3560 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx),
3561 DEFINE_PROP_UINT16("rx_queue_size", VirtIONet, net_conf.rx_queue_size,
3562 VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE),
3563 DEFINE_PROP_UINT16("tx_queue_size", VirtIONet, net_conf.tx_queue_size,
3564 VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE),
3565 DEFINE_PROP_UINT16("host_mtu", VirtIONet, net_conf.mtu, 0),
3566 DEFINE_PROP_BOOL("x-mtu-bypass-backend", VirtIONet, mtu_bypass_backend,
3567 true),
3568 DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN),
3569 DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str),
3570 DEFINE_PROP_BOOL("failover", VirtIONet, failover, false),
3571 DEFINE_PROP_END_OF_LIST(),
3572};
3573
3574static void virtio_net_class_init(ObjectClass *klass, void *data)
3575{
3576 DeviceClass *dc = DEVICE_CLASS(klass);
3577 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
3578
3579 device_class_set_props(dc, virtio_net_properties);
3580 dc->vmsd = &vmstate_virtio_net;
3581 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
3582 vdc->realize = virtio_net_device_realize;
3583 vdc->unrealize = virtio_net_device_unrealize;
3584 vdc->get_config = virtio_net_get_config;
3585 vdc->set_config = virtio_net_set_config;
3586 vdc->get_features = virtio_net_get_features;
3587 vdc->set_features = virtio_net_set_features;
3588 vdc->bad_features = virtio_net_bad_features;
3589 vdc->reset = virtio_net_reset;
3590 vdc->set_status = virtio_net_set_status;
3591 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask;
3592 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending;
3593 vdc->legacy_features |= (0x1 << VIRTIO_NET_F_GSO);
3594 vdc->post_load = virtio_net_post_load_virtio;
3595 vdc->vmsd = &vmstate_virtio_net_device;
3596 vdc->primary_unplug_pending = primary_unplug_pending;
3597}
3598
3599static const TypeInfo virtio_net_info = {
3600 .name = TYPE_VIRTIO_NET,
3601 .parent = TYPE_VIRTIO_DEVICE,
3602 .instance_size = sizeof(VirtIONet),
3603 .instance_init = virtio_net_instance_init,
3604 .class_init = virtio_net_class_init,
3605};
3606
3607static void virtio_register_types(void)
3608{
3609 type_register_static(&virtio_net_info);
3610}
3611
3612type_init(virtio_register_types)
3613