2 * Virtio Network Device
4 * Copyright IBM, Corp. 2007
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
16 #include "qemu-timer.h"
17 #include "virtio-net.h"
19 #define VIRTIO_NET_VM_VERSION 10
21 #define MAC_TABLE_ENTRIES 64
22 #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */
24 typedef struct VirtIONet
27 uint8_t mac[ETH_ALEN];
35 uint32_t has_vnet_hdr;
37 VirtQueueElement elem;
40 int mergeable_rx_bufs;
50 uint8_t multi_overflow;
58 * - we could suppress RX interrupt if we were so inclined.
61 static VirtIONet *to_virtio_net(VirtIODevice *vdev)
63 return (VirtIONet *)vdev;
66 static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
68 VirtIONet *n = to_virtio_net(vdev);
69 struct virtio_net_config netcfg;
71 netcfg.status = n->status;
72 memcpy(netcfg.mac, n->mac, ETH_ALEN);
73 memcpy(config, &netcfg, sizeof(netcfg));
76 static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config)
78 VirtIONet *n = to_virtio_net(vdev);
79 struct virtio_net_config netcfg;
81 memcpy(&netcfg, config, sizeof(netcfg));
83 if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
84 memcpy(n->mac, netcfg.mac, ETH_ALEN);
85 qemu_format_nic_info_str(n->vc, n->mac);
89 static void virtio_net_set_link_status(VLANClientState *vc)
91 VirtIONet *n = vc->opaque;
92 uint16_t old_status = n->status;
95 n->status &= ~VIRTIO_NET_S_LINK_UP;
97 n->status |= VIRTIO_NET_S_LINK_UP;
99 if (n->status != old_status)
100 virtio_notify_config(&n->vdev);
103 static void virtio_net_reset(VirtIODevice *vdev)
105 VirtIONet *n = to_virtio_net(vdev);
107 /* Reset back to compatibility mode */
115 /* Flush any MAC and VLAN filter table state */
116 n->mac_table.in_use = 0;
117 n->mac_table.first_multi = 0;
118 n->mac_table.multi_overflow = 0;
119 n->mac_table.uni_overflow = 0;
120 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
121 memset(n->vlans, 0, MAX_VLAN >> 3);
124 static int peer_has_vnet_hdr(VirtIONet *n)
129 if (n->vc->peer->type != NET_CLIENT_TYPE_TAP)
132 n->has_vnet_hdr = tap_has_vnet_hdr(n->vc->peer);
134 return n->has_vnet_hdr;
137 static uint32_t virtio_net_get_features(VirtIODevice *vdev)
139 VirtIONet *n = to_virtio_net(vdev);
140 uint32_t features = (1 << VIRTIO_NET_F_MAC) |
141 (1 << VIRTIO_NET_F_MRG_RXBUF) |
142 (1 << VIRTIO_NET_F_STATUS) |
143 (1 << VIRTIO_NET_F_CTRL_VQ) |
144 (1 << VIRTIO_NET_F_CTRL_RX) |
145 (1 << VIRTIO_NET_F_CTRL_VLAN) |
146 (1 << VIRTIO_NET_F_CTRL_RX_EXTRA);
148 if (peer_has_vnet_hdr(n)) {
149 tap_using_vnet_hdr(n->vc->peer, 1);
151 features |= (1 << VIRTIO_NET_F_CSUM);
152 features |= (1 << VIRTIO_NET_F_HOST_TSO4);
153 features |= (1 << VIRTIO_NET_F_HOST_TSO6);
154 features |= (1 << VIRTIO_NET_F_HOST_ECN);
160 static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
162 uint32_t features = 0;
164 /* Linux kernel 2.6.25. It understood MAC (as everyone must),
166 features |= (1 << VIRTIO_NET_F_MAC);
167 features |= (1 << VIRTIO_NET_F_GUEST_CSUM);
168 features |= (1 << VIRTIO_NET_F_GUEST_TSO4);
169 features |= (1 << VIRTIO_NET_F_GUEST_TSO6);
170 features |= (1 << VIRTIO_NET_F_GUEST_ECN);
172 return features & virtio_net_get_features(vdev);
175 static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features)
177 VirtIONet *n = to_virtio_net(vdev);
179 n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
182 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
183 VirtQueueElement *elem)
187 if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) {
188 fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
192 on = ldub_p(elem->out_sg[1].iov_base);
194 if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
196 else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI)
198 else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI)
200 else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI)
202 else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI)
204 else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST)
207 return VIRTIO_NET_ERR;
209 return VIRTIO_NET_OK;
212 static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
213 VirtQueueElement *elem)
215 struct virtio_net_ctrl_mac mac_data;
217 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 ||
218 elem->out_sg[1].iov_len < sizeof(mac_data) ||
219 elem->out_sg[2].iov_len < sizeof(mac_data))
220 return VIRTIO_NET_ERR;
222 n->mac_table.in_use = 0;
223 n->mac_table.first_multi = 0;
224 n->mac_table.uni_overflow = 0;
225 n->mac_table.multi_overflow = 0;
226 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
228 mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base);
230 if (sizeof(mac_data.entries) +
231 (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
232 return VIRTIO_NET_ERR;
234 if (mac_data.entries <= MAC_TABLE_ENTRIES) {
235 memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data),
236 mac_data.entries * ETH_ALEN);
237 n->mac_table.in_use += mac_data.entries;
239 n->mac_table.uni_overflow = 1;
242 n->mac_table.first_multi = n->mac_table.in_use;
244 mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base);
246 if (sizeof(mac_data.entries) +
247 (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
248 return VIRTIO_NET_ERR;
250 if (mac_data.entries) {
251 if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
252 memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN),
253 elem->out_sg[2].iov_base + sizeof(mac_data),
254 mac_data.entries * ETH_ALEN);
255 n->mac_table.in_use += mac_data.entries;
257 n->mac_table.multi_overflow = 1;
261 return VIRTIO_NET_OK;
264 static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd,
265 VirtQueueElement *elem)
269 if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) {
270 fprintf(stderr, "virtio-net ctrl invalid vlan command\n");
271 return VIRTIO_NET_ERR;
274 vid = lduw_le_p(elem->out_sg[1].iov_base);
277 return VIRTIO_NET_ERR;
279 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
280 n->vlans[vid >> 5] |= (1U << (vid & 0x1f));
281 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL)
282 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f));
284 return VIRTIO_NET_ERR;
286 return VIRTIO_NET_OK;
289 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
291 VirtIONet *n = to_virtio_net(vdev);
292 struct virtio_net_ctrl_hdr ctrl;
293 virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
294 VirtQueueElement elem;
296 while (virtqueue_pop(vq, &elem)) {
297 if ((elem.in_num < 1) || (elem.out_num < 1)) {
298 fprintf(stderr, "virtio-net ctrl missing headers\n");
302 if (elem.out_sg[0].iov_len < sizeof(ctrl) ||
303 elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) {
304 fprintf(stderr, "virtio-net ctrl header not in correct element\n");
308 ctrl.class = ldub_p(elem.out_sg[0].iov_base);
309 ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class));
311 if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
312 status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem);
313 else if (ctrl.class == VIRTIO_NET_CTRL_MAC)
314 status = virtio_net_handle_mac(n, ctrl.cmd, &elem);
315 else if (ctrl.class == VIRTIO_NET_CTRL_VLAN)
316 status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem);
318 stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
320 virtqueue_push(vq, &elem, sizeof(status));
321 virtio_notify(vdev, vq);
327 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq)
329 VirtIONet *n = to_virtio_net(vdev);
331 qemu_flush_queued_packets(n->vc);
333 /* We now have RX buffers, signal to the IO thread to break out of the
334 * select to re-poll the tap file descriptor */
338 static int do_virtio_net_can_receive(VirtIONet *n, int bufsize)
340 if (!virtio_queue_ready(n->rx_vq) ||
341 !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
344 if (virtio_queue_empty(n->rx_vq) ||
345 (n->mergeable_rx_bufs &&
346 !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
347 virtio_queue_set_notification(n->rx_vq, 1);
351 virtio_queue_set_notification(n->rx_vq, 0);
355 static int virtio_net_can_receive(VLANClientState *vc)
357 VirtIONet *n = vc->opaque;
359 return do_virtio_net_can_receive(n, VIRTIO_NET_MAX_BUFSIZE);
362 static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count)
367 while (offset < count && i < iovcnt) {
368 int len = MIN(iov[i].iov_len, count - offset);
369 memcpy(iov[i].iov_base, buf + offset, len);
377 static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt,
378 const void *buf, size_t size, size_t hdr_len)
380 struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base;
384 hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE;
386 if (n->has_vnet_hdr) {
387 memcpy(hdr, buf, sizeof(*hdr));
388 offset = sizeof(*hdr);
391 /* We only ever receive a struct virtio_net_hdr from the tapfd,
392 * but we may be passing along a larger header to the guest.
394 iov[0].iov_base += hdr_len;
395 iov[0].iov_len -= hdr_len;
400 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
402 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
403 static const uint8_t vlan[] = {0x81, 0x00};
404 uint8_t *ptr = (uint8_t *)buf;
410 if (n->has_vnet_hdr) {
411 ptr += sizeof(struct virtio_net_hdr);
414 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) {
415 int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff;
416 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f))))
420 if (ptr[0] & 1) { // multicast
421 if (!memcmp(ptr, bcast, sizeof(bcast))) {
423 } else if (n->nomulti) {
425 } else if (n->allmulti || n->mac_table.multi_overflow) {
429 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
430 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
437 } else if (n->alluni || n->mac_table.uni_overflow) {
439 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) {
443 for (i = 0; i < n->mac_table.first_multi; i++) {
444 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
453 static ssize_t virtio_net_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
455 VirtIONet *n = vc->opaque;
456 struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL;
457 size_t hdr_len, offset, i;
459 if (!do_virtio_net_can_receive(n, size))
462 if (!receive_filter(n, buf, size))
465 /* hdr_len refers to the header we supply to the guest */
466 hdr_len = n->mergeable_rx_bufs ?
467 sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr);
471 while (offset < size) {
472 VirtQueueElement elem;
474 struct iovec sg[VIRTQUEUE_MAX_SIZE];
478 if ((i != 0 && !n->mergeable_rx_bufs) ||
479 virtqueue_pop(n->rx_vq, &elem) == 0) {
482 fprintf(stderr, "virtio-net truncating packet\n");
486 if (elem.in_num < 1) {
487 fprintf(stderr, "virtio-net receive queue contains no in buffers\n");
491 if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) {
492 fprintf(stderr, "virtio-net header not in first element\n");
496 memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num);
499 if (n->mergeable_rx_bufs)
500 mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base;
502 offset += receive_header(n, sg, elem.in_num,
503 buf + offset, size - offset, hdr_len);
507 /* copy in packet. ugh */
508 len = iov_fill(sg, elem.in_num,
509 buf + offset, size - offset);
512 /* signal other side */
513 virtqueue_fill(n->rx_vq, &elem, total, i++);
519 mhdr->num_buffers = i;
521 virtqueue_flush(n->rx_vq, i);
522 virtio_notify(&n->vdev, n->rx_vq);
527 static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq);
529 static void virtio_net_tx_complete(VLANClientState *vc, ssize_t len)
531 VirtIONet *n = vc->opaque;
533 virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len);
534 virtio_notify(&n->vdev, n->tx_vq);
536 n->async_tx.elem.out_num = n->async_tx.len = 0;
538 virtio_queue_set_notification(n->tx_vq, 1);
539 virtio_net_flush_tx(n, n->tx_vq);
543 static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq)
545 VirtQueueElement elem;
547 if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
550 if (n->async_tx.elem.out_num) {
551 virtio_queue_set_notification(n->tx_vq, 0);
555 while (virtqueue_pop(vq, &elem)) {
556 ssize_t ret, len = 0;
557 unsigned int out_num = elem.out_num;
558 struct iovec *out_sg = &elem.out_sg[0];
561 /* hdr_len refers to the header received from the guest */
562 hdr_len = n->mergeable_rx_bufs ?
563 sizeof(struct virtio_net_hdr_mrg_rxbuf) :
564 sizeof(struct virtio_net_hdr);
566 if (out_num < 1 || out_sg->iov_len != hdr_len) {
567 fprintf(stderr, "virtio-net header not in first element\n");
571 /* ignore the header if GSO is not supported */
572 if (!n->has_vnet_hdr) {
576 } else if (n->mergeable_rx_bufs) {
577 /* tapfd expects a struct virtio_net_hdr */
578 hdr_len -= sizeof(struct virtio_net_hdr);
579 out_sg->iov_len -= hdr_len;
583 ret = qemu_sendv_packet_async(n->vc, out_sg, out_num,
584 virtio_net_tx_complete);
586 virtio_queue_set_notification(n->tx_vq, 0);
587 n->async_tx.elem = elem;
588 n->async_tx.len = len;
594 virtqueue_push(vq, &elem, len);
595 virtio_notify(&n->vdev, vq);
599 static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq)
601 VirtIONet *n = to_virtio_net(vdev);
603 if (n->tx_timer_active) {
604 virtio_queue_set_notification(vq, 1);
605 qemu_del_timer(n->tx_timer);
606 n->tx_timer_active = 0;
607 virtio_net_flush_tx(n, vq);
609 qemu_mod_timer(n->tx_timer,
610 qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL);
611 n->tx_timer_active = 1;
612 virtio_queue_set_notification(vq, 0);
616 static void virtio_net_tx_timer(void *opaque)
618 VirtIONet *n = opaque;
620 n->tx_timer_active = 0;
622 /* Just in case the driver is not ready on more */
623 if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
626 virtio_queue_set_notification(n->tx_vq, 1);
627 virtio_net_flush_tx(n, n->tx_vq);
630 static void virtio_net_save(QEMUFile *f, void *opaque)
632 VirtIONet *n = opaque;
634 virtio_save(&n->vdev, f);
636 qemu_put_buffer(f, n->mac, ETH_ALEN);
637 qemu_put_be32(f, n->tx_timer_active);
638 qemu_put_be32(f, n->mergeable_rx_bufs);
639 qemu_put_be16(f, n->status);
640 qemu_put_byte(f, n->promisc);
641 qemu_put_byte(f, n->allmulti);
642 qemu_put_be32(f, n->mac_table.in_use);
643 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN);
644 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
645 qemu_put_be32(f, n->has_vnet_hdr);
646 qemu_put_byte(f, n->mac_table.multi_overflow);
647 qemu_put_byte(f, n->mac_table.uni_overflow);
648 qemu_put_byte(f, n->alluni);
649 qemu_put_byte(f, n->nomulti);
650 qemu_put_byte(f, n->nouni);
651 qemu_put_byte(f, n->nobcast);
654 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
656 VirtIONet *n = opaque;
659 if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION)
662 virtio_load(&n->vdev, f);
664 qemu_get_buffer(f, n->mac, ETH_ALEN);
665 n->tx_timer_active = qemu_get_be32(f);
666 n->mergeable_rx_bufs = qemu_get_be32(f);
669 n->status = qemu_get_be16(f);
671 if (version_id >= 4) {
672 if (version_id < 8) {
673 n->promisc = qemu_get_be32(f);
674 n->allmulti = qemu_get_be32(f);
676 n->promisc = qemu_get_byte(f);
677 n->allmulti = qemu_get_byte(f);
681 if (version_id >= 5) {
682 n->mac_table.in_use = qemu_get_be32(f);
683 /* MAC_TABLE_ENTRIES may be different from the saved image */
684 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
685 qemu_get_buffer(f, n->mac_table.macs,
686 n->mac_table.in_use * ETH_ALEN);
687 } else if (n->mac_table.in_use) {
688 qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR);
689 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
690 n->mac_table.in_use = 0;
695 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
697 if (version_id >= 7) {
698 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
699 qemu_error("virtio-net: saved image requires vnet_hdr=on\n");
703 if (n->has_vnet_hdr) {
704 tap_using_vnet_hdr(n->vc->peer, 1);
708 if (version_id >= 9) {
709 n->mac_table.multi_overflow = qemu_get_byte(f);
710 n->mac_table.uni_overflow = qemu_get_byte(f);
713 if (version_id >= 10) {
714 n->alluni = qemu_get_byte(f);
715 n->nomulti = qemu_get_byte(f);
716 n->nouni = qemu_get_byte(f);
717 n->nobcast = qemu_get_byte(f);
720 /* Find the first multicast entry in the saved MAC filter */
721 for (i = 0; i < n->mac_table.in_use; i++) {
722 if (n->mac_table.macs[i * ETH_ALEN] & 1) {
726 n->mac_table.first_multi = i;
728 if (n->tx_timer_active) {
729 qemu_mod_timer(n->tx_timer,
730 qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL);
736 static void virtio_net_cleanup(VLANClientState *vc)
738 VirtIONet *n = vc->opaque;
743 VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf)
746 static int virtio_net_id;
748 n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
749 sizeof(struct virtio_net_config),
752 n->vdev.get_config = virtio_net_get_config;
753 n->vdev.set_config = virtio_net_set_config;
754 n->vdev.get_features = virtio_net_get_features;
755 n->vdev.set_features = virtio_net_set_features;
756 n->vdev.bad_features = virtio_net_bad_features;
757 n->vdev.reset = virtio_net_reset;
758 n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
759 n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
760 n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
761 qemu_macaddr_default_if_unset(&conf->macaddr);
762 n->status = VIRTIO_NET_S_LINK_UP;
763 n->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_NIC, conf->vlan, conf->peer,
764 dev->info->name, dev->id,
765 virtio_net_can_receive,
766 virtio_net_receive, NULL, NULL,
767 virtio_net_cleanup, n);
768 n->vc->link_status_changed = virtio_net_set_link_status;
770 qemu_format_nic_info_str(n->vc, conf->macaddr.a);
772 n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n);
773 n->tx_timer_active = 0;
774 n->mergeable_rx_bufs = 0;
775 n->promisc = 1; /* for compatibility */
777 n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN);
779 n->vlans = qemu_mallocz(MAX_VLAN >> 3);
781 register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
782 virtio_net_save, virtio_net_load, n);
787 void virtio_net_exit(VirtIODevice *vdev)
789 VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev);
791 qemu_purge_queued_packets(n->vc);
793 unregister_savevm("virtio-net", n);
795 qemu_free(n->mac_table.macs);
798 qemu_del_timer(n->tx_timer);
799 qemu_free_timer(n->tx_timer);
801 virtio_cleanup(&n->vdev);
802 qemu_del_vlan_client(n->vc);