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Commit | Line | Data |
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fbe78f4f AL |
1 | /* |
2 | * Virtio Network Device | |
3 | * | |
4 | * Copyright IBM, Corp. 2007 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
e4d5639d | 14 | #include "iov.h" |
fbe78f4f AL |
15 | #include "virtio.h" |
16 | #include "net.h" | |
7200ac3c | 17 | #include "net/checksum.h" |
a8ed73f7 | 18 | #include "net/tap.h" |
2f792016 | 19 | #include "qemu-error.h" |
fbe78f4f AL |
20 | #include "qemu-timer.h" |
21 | #include "virtio-net.h" | |
9bc6304c | 22 | #include "vhost_net.h" |
fbe78f4f | 23 | |
0ce0e8f4 | 24 | #define VIRTIO_NET_VM_VERSION 11 |
b6503ed9 | 25 | |
4ffb17f5 | 26 | #define MAC_TABLE_ENTRIES 64 |
f21c0ed9 | 27 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 28 | |
fbe78f4f AL |
29 | typedef struct VirtIONet |
30 | { | |
31 | VirtIODevice vdev; | |
79674068 | 32 | uint8_t mac[ETH_ALEN]; |
554c97dd | 33 | uint16_t status; |
fbe78f4f AL |
34 | VirtQueue *rx_vq; |
35 | VirtQueue *tx_vq; | |
3d11d36c | 36 | VirtQueue *ctrl_vq; |
eb6b6c12 | 37 | NICState *nic; |
fbe78f4f AL |
38 | QEMUTimer *tx_timer; |
39 | int tx_timer_active; | |
3a330134 | 40 | uint32_t has_vnet_hdr; |
0ce0e8f4 | 41 | uint8_t has_ufo; |
6243375f MM |
42 | struct { |
43 | VirtQueueElement elem; | |
44 | ssize_t len; | |
45 | } async_tx; | |
fbe78f4f | 46 | int mergeable_rx_bufs; |
f10c592e AW |
47 | uint8_t promisc; |
48 | uint8_t allmulti; | |
015cb166 AW |
49 | uint8_t alluni; |
50 | uint8_t nomulti; | |
51 | uint8_t nouni; | |
52 | uint8_t nobcast; | |
9bc6304c MT |
53 | uint8_t vhost_started; |
54 | VMChangeStateEntry *vmstate; | |
b6503ed9 AL |
55 | struct { |
56 | int in_use; | |
2d9aba39 | 57 | int first_multi; |
8fd2a2f1 AW |
58 | uint8_t multi_overflow; |
59 | uint8_t uni_overflow; | |
b6503ed9 AL |
60 | uint8_t *macs; |
61 | } mac_table; | |
f21c0ed9 | 62 | uint32_t *vlans; |
fbe78f4f AL |
63 | } VirtIONet; |
64 | ||
65 | /* TODO | |
66 | * - we could suppress RX interrupt if we were so inclined. | |
67 | */ | |
68 | ||
69 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
70 | { | |
71 | return (VirtIONet *)vdev; | |
72 | } | |
73 | ||
0f03eca6 | 74 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
75 | { |
76 | VirtIONet *n = to_virtio_net(vdev); | |
77 | struct virtio_net_config netcfg; | |
78 | ||
554c97dd | 79 | netcfg.status = n->status; |
79674068 | 80 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
fbe78f4f AL |
81 | memcpy(config, &netcfg, sizeof(netcfg)); |
82 | } | |
83 | ||
0f03eca6 AL |
84 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
85 | { | |
86 | VirtIONet *n = to_virtio_net(vdev); | |
87 | struct virtio_net_config netcfg; | |
88 | ||
89 | memcpy(&netcfg, config, sizeof(netcfg)); | |
90 | ||
79674068 AL |
91 | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
92 | memcpy(n->mac, netcfg.mac, ETH_ALEN); | |
eb6b6c12 | 93 | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
0f03eca6 AL |
94 | } |
95 | } | |
96 | ||
eb6b6c12 | 97 | static void virtio_net_set_link_status(VLANClientState *nc) |
554c97dd | 98 | { |
eb6b6c12 | 99 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
554c97dd AL |
100 | uint16_t old_status = n->status; |
101 | ||
eb6b6c12 | 102 | if (nc->link_down) |
554c97dd AL |
103 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
104 | else | |
105 | n->status |= VIRTIO_NET_S_LINK_UP; | |
106 | ||
107 | if (n->status != old_status) | |
108 | virtio_notify_config(&n->vdev); | |
109 | } | |
110 | ||
002437cd AL |
111 | static void virtio_net_reset(VirtIODevice *vdev) |
112 | { | |
113 | VirtIONet *n = to_virtio_net(vdev); | |
114 | ||
115 | /* Reset back to compatibility mode */ | |
116 | n->promisc = 1; | |
117 | n->allmulti = 0; | |
015cb166 AW |
118 | n->alluni = 0; |
119 | n->nomulti = 0; | |
120 | n->nouni = 0; | |
121 | n->nobcast = 0; | |
9bc6304c MT |
122 | if (n->vhost_started) { |
123 | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); | |
124 | n->vhost_started = 0; | |
125 | } | |
b6503ed9 | 126 | |
f21c0ed9 | 127 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 128 | n->mac_table.in_use = 0; |
2d9aba39 | 129 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
130 | n->mac_table.multi_overflow = 0; |
131 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 132 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
f21c0ed9 | 133 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
134 | } |
135 | ||
3a330134 MM |
136 | static int peer_has_vnet_hdr(VirtIONet *n) |
137 | { | |
eb6b6c12 | 138 | if (!n->nic->nc.peer) |
3a330134 MM |
139 | return 0; |
140 | ||
665a3b07 | 141 | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) |
3a330134 MM |
142 | return 0; |
143 | ||
eb6b6c12 | 144 | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
3a330134 MM |
145 | |
146 | return n->has_vnet_hdr; | |
147 | } | |
148 | ||
0ce0e8f4 MM |
149 | static int peer_has_ufo(VirtIONet *n) |
150 | { | |
151 | if (!peer_has_vnet_hdr(n)) | |
152 | return 0; | |
153 | ||
eb6b6c12 | 154 | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
0ce0e8f4 MM |
155 | |
156 | return n->has_ufo; | |
157 | } | |
158 | ||
8172539d | 159 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 160 | { |
3a330134 | 161 | VirtIONet *n = to_virtio_net(vdev); |
fbe78f4f | 162 | |
c9f79a3f MT |
163 | features |= (1 << VIRTIO_NET_F_MAC); |
164 | ||
3a330134 | 165 | if (peer_has_vnet_hdr(n)) { |
eb6b6c12 | 166 | tap_using_vnet_hdr(n->nic->nc.peer, 1); |
8172539d MT |
167 | } else { |
168 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); | |
169 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
170 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
171 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
172 | ||
173 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
174 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
175 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
176 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
177 | } | |
3a330134 | 178 | |
8172539d MT |
179 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
180 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
181 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
182 | } |
183 | ||
9bc6304c MT |
184 | if (!n->nic->nc.peer || |
185 | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { | |
186 | return features; | |
187 | } | |
188 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
189 | return features; | |
190 | } | |
191 | return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features); | |
fbe78f4f AL |
192 | } |
193 | ||
8eca6b1b AL |
194 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
195 | { | |
196 | uint32_t features = 0; | |
197 | ||
198 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
199 | * but also these: */ | |
200 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
201 | features |= (1 << VIRTIO_NET_F_CSUM); |
202 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
203 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
204 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 205 | |
8172539d | 206 | return features; |
8eca6b1b AL |
207 | } |
208 | ||
fbe78f4f AL |
209 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
210 | { | |
211 | VirtIONet *n = to_virtio_net(vdev); | |
212 | ||
213 | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)); | |
f5436dd9 MM |
214 | |
215 | if (n->has_vnet_hdr) { | |
eb6b6c12 | 216 | tap_set_offload(n->nic->nc.peer, |
f5436dd9 MM |
217 | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
218 | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
219 | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
6c9f58ba SS |
220 | (features >> VIRTIO_NET_F_GUEST_ECN) & 1, |
221 | (features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
f5436dd9 | 222 | } |
dc14a397 DS |
223 | if (!n->nic->nc.peer || |
224 | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { | |
225 | return; | |
226 | } | |
227 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
228 | return; | |
229 | } | |
57c3229b | 230 | vhost_net_ack_features(tap_get_vhost_net(n->nic->nc.peer), features); |
fbe78f4f AL |
231 | } |
232 | ||
002437cd AL |
233 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
234 | VirtQueueElement *elem) | |
235 | { | |
236 | uint8_t on; | |
237 | ||
238 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { | |
239 | fprintf(stderr, "virtio-net ctrl invalid rx mode command\n"); | |
240 | exit(1); | |
241 | } | |
242 | ||
243 | on = ldub_p(elem->out_sg[1].iov_base); | |
244 | ||
245 | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC) | |
246 | n->promisc = on; | |
247 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) | |
248 | n->allmulti = on; | |
015cb166 AW |
249 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
250 | n->alluni = on; | |
251 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) | |
252 | n->nomulti = on; | |
253 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) | |
254 | n->nouni = on; | |
255 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) | |
256 | n->nobcast = on; | |
002437cd AL |
257 | else |
258 | return VIRTIO_NET_ERR; | |
259 | ||
260 | return VIRTIO_NET_OK; | |
261 | } | |
262 | ||
b6503ed9 AL |
263 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
264 | VirtQueueElement *elem) | |
265 | { | |
266 | struct virtio_net_ctrl_mac mac_data; | |
267 | ||
268 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || | |
269 | elem->out_sg[1].iov_len < sizeof(mac_data) || | |
270 | elem->out_sg[2].iov_len < sizeof(mac_data)) | |
271 | return VIRTIO_NET_ERR; | |
272 | ||
273 | n->mac_table.in_use = 0; | |
2d9aba39 | 274 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
275 | n->mac_table.uni_overflow = 0; |
276 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
277 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
278 | ||
279 | mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base); | |
280 | ||
281 | if (sizeof(mac_data.entries) + | |
282 | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len) | |
283 | return VIRTIO_NET_ERR; | |
284 | ||
285 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
286 | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), | |
287 | mac_data.entries * ETH_ALEN); | |
288 | n->mac_table.in_use += mac_data.entries; | |
289 | } else { | |
8fd2a2f1 | 290 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
291 | } |
292 | ||
2d9aba39 AW |
293 | n->mac_table.first_multi = n->mac_table.in_use; |
294 | ||
b6503ed9 AL |
295 | mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base); |
296 | ||
297 | if (sizeof(mac_data.entries) + | |
298 | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len) | |
299 | return VIRTIO_NET_ERR; | |
300 | ||
301 | if (mac_data.entries) { | |
302 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { | |
303 | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), | |
304 | elem->out_sg[2].iov_base + sizeof(mac_data), | |
305 | mac_data.entries * ETH_ALEN); | |
306 | n->mac_table.in_use += mac_data.entries; | |
8fd2a2f1 AW |
307 | } else { |
308 | n->mac_table.multi_overflow = 1; | |
309 | } | |
b6503ed9 AL |
310 | } |
311 | ||
312 | return VIRTIO_NET_OK; | |
313 | } | |
314 | ||
f21c0ed9 AL |
315 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
316 | VirtQueueElement *elem) | |
317 | { | |
318 | uint16_t vid; | |
319 | ||
320 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { | |
321 | fprintf(stderr, "virtio-net ctrl invalid vlan command\n"); | |
322 | return VIRTIO_NET_ERR; | |
323 | } | |
324 | ||
325 | vid = lduw_le_p(elem->out_sg[1].iov_base); | |
326 | ||
327 | if (vid >= MAX_VLAN) | |
328 | return VIRTIO_NET_ERR; | |
329 | ||
330 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
331 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
332 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
333 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
334 | else | |
335 | return VIRTIO_NET_ERR; | |
336 | ||
337 | return VIRTIO_NET_OK; | |
338 | } | |
339 | ||
3d11d36c AL |
340 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
341 | { | |
002437cd | 342 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
343 | struct virtio_net_ctrl_hdr ctrl; |
344 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
345 | VirtQueueElement elem; | |
346 | ||
347 | while (virtqueue_pop(vq, &elem)) { | |
348 | if ((elem.in_num < 1) || (elem.out_num < 1)) { | |
349 | fprintf(stderr, "virtio-net ctrl missing headers\n"); | |
350 | exit(1); | |
351 | } | |
352 | ||
353 | if (elem.out_sg[0].iov_len < sizeof(ctrl) || | |
c6bb9a32 | 354 | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
3d11d36c AL |
355 | fprintf(stderr, "virtio-net ctrl header not in correct element\n"); |
356 | exit(1); | |
357 | } | |
358 | ||
359 | ctrl.class = ldub_p(elem.out_sg[0].iov_base); | |
360 | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); | |
361 | ||
002437cd AL |
362 | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE) |
363 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); | |
b6503ed9 AL |
364 | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
365 | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); | |
f21c0ed9 AL |
366 | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
367 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); | |
002437cd | 368 | |
3d11d36c AL |
369 | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status); |
370 | ||
371 | virtqueue_push(vq, &elem, sizeof(status)); | |
372 | virtio_notify(vdev, vq); | |
373 | } | |
374 | } | |
375 | ||
fbe78f4f AL |
376 | /* RX */ |
377 | ||
378 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
379 | { | |
8aeff62d MM |
380 | VirtIONet *n = to_virtio_net(vdev); |
381 | ||
eb6b6c12 | 382 | qemu_flush_queued_packets(&n->nic->nc); |
a61d1f67 GC |
383 | |
384 | /* We now have RX buffers, signal to the IO thread to break out of the | |
385 | * select to re-poll the tap file descriptor */ | |
386 | qemu_notify_event(); | |
fbe78f4f AL |
387 | } |
388 | ||
eb6b6c12 | 389 | static int virtio_net_can_receive(VLANClientState *nc) |
fbe78f4f | 390 | { |
eb6b6c12 | 391 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
cdd5cc12 | 392 | |
fbe78f4f AL |
393 | if (!virtio_queue_ready(n->rx_vq) || |
394 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
395 | return 0; | |
396 | ||
cdd5cc12 MM |
397 | return 1; |
398 | } | |
399 | ||
400 | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) | |
401 | { | |
fbe78f4f AL |
402 | if (virtio_queue_empty(n->rx_vq) || |
403 | (n->mergeable_rx_bufs && | |
404 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) { | |
405 | virtio_queue_set_notification(n->rx_vq, 1); | |
06b12970 TL |
406 | |
407 | /* To avoid a race condition where the guest has made some buffers | |
408 | * available after the above check but before notification was | |
409 | * enabled, check for available buffers again. | |
410 | */ | |
411 | if (virtio_queue_empty(n->rx_vq) || | |
412 | (n->mergeable_rx_bufs && | |
413 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) | |
414 | return 0; | |
fbe78f4f AL |
415 | } |
416 | ||
417 | virtio_queue_set_notification(n->rx_vq, 0); | |
418 | return 1; | |
419 | } | |
420 | ||
1d41b0c1 AL |
421 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
422 | * it never finds out that the packets don't have valid checksums. This | |
423 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
424 | * fix this with Xen but it hasn't appeared in an upstream release of | |
425 | * dhclient yet. | |
426 | * | |
427 | * To avoid breaking existing guests, we catch udp packets and add | |
428 | * checksums. This is terrible but it's better than hacking the guest | |
429 | * kernels. | |
430 | * | |
431 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
432 | * we should provide a mechanism to disable it to avoid polluting the host | |
433 | * cache. | |
434 | */ | |
435 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
436 | const uint8_t *buf, size_t size) | |
437 | { | |
438 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
439 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
440 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
441 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
442 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
443 | /* FIXME this cast is evil */ | |
444 | net_checksum_calculate((uint8_t *)buf, size); | |
445 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; | |
446 | } | |
447 | } | |
448 | ||
fbe78f4f | 449 | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
4689f4b3 | 450 | const void *buf, size_t size, size_t hdr_len) |
fbe78f4f | 451 | { |
3f4cb3d3 | 452 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
fbe78f4f AL |
453 | int offset = 0; |
454 | ||
455 | hdr->flags = 0; | |
456 | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
457 | ||
3a330134 MM |
458 | if (n->has_vnet_hdr) { |
459 | memcpy(hdr, buf, sizeof(*hdr)); | |
460 | offset = sizeof(*hdr); | |
1d41b0c1 | 461 | work_around_broken_dhclient(hdr, buf + offset, size - offset); |
3a330134 MM |
462 | } |
463 | ||
fbe78f4f AL |
464 | /* We only ever receive a struct virtio_net_hdr from the tapfd, |
465 | * but we may be passing along a larger header to the guest. | |
466 | */ | |
467 | iov[0].iov_base += hdr_len; | |
468 | iov[0].iov_len -= hdr_len; | |
469 | ||
470 | return offset; | |
471 | } | |
472 | ||
3831ab20 AL |
473 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
474 | { | |
475 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 476 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 477 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 478 | int i; |
3831ab20 AL |
479 | |
480 | if (n->promisc) | |
481 | return 1; | |
482 | ||
3a330134 MM |
483 | if (n->has_vnet_hdr) { |
484 | ptr += sizeof(struct virtio_net_hdr); | |
485 | } | |
486 | ||
f21c0ed9 AL |
487 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
488 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
489 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
490 | return 0; | |
491 | } | |
492 | ||
bbe2f399 AW |
493 | if (ptr[0] & 1) { // multicast |
494 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
495 | return !n->nobcast; |
496 | } else if (n->nomulti) { | |
497 | return 0; | |
8fd2a2f1 | 498 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
499 | return 1; |
500 | } | |
2d9aba39 AW |
501 | |
502 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
503 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
504 | return 1; | |
505 | } | |
506 | } | |
bbe2f399 | 507 | } else { // unicast |
015cb166 AW |
508 | if (n->nouni) { |
509 | return 0; | |
510 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
511 | return 1; |
512 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
513 | return 1; |
514 | } | |
3831ab20 | 515 | |
2d9aba39 AW |
516 | for (i = 0; i < n->mac_table.first_multi; i++) { |
517 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
518 | return 1; | |
519 | } | |
520 | } | |
b6503ed9 AL |
521 | } |
522 | ||
3831ab20 AL |
523 | return 0; |
524 | } | |
525 | ||
eb6b6c12 | 526 | static ssize_t virtio_net_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 527 | { |
eb6b6c12 | 528 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
fbe78f4f | 529 | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
4689f4b3 | 530 | size_t hdr_len, offset, i; |
fbe78f4f | 531 | |
eb6b6c12 | 532 | if (!virtio_net_can_receive(&n->nic->nc)) |
cdd5cc12 MM |
533 | return -1; |
534 | ||
535 | if (!virtio_net_has_buffers(n, size)) | |
8aeff62d | 536 | return 0; |
fbe78f4f | 537 | |
3831ab20 | 538 | if (!receive_filter(n, buf, size)) |
4f1c942b | 539 | return size; |
3831ab20 | 540 | |
fbe78f4f AL |
541 | /* hdr_len refers to the header we supply to the guest */ |
542 | hdr_len = n->mergeable_rx_bufs ? | |
543 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
544 | ||
545 | offset = i = 0; | |
546 | ||
547 | while (offset < size) { | |
548 | VirtQueueElement elem; | |
549 | int len, total; | |
550 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; | |
551 | ||
22c253d9 | 552 | total = 0; |
fbe78f4f AL |
553 | |
554 | if ((i != 0 && !n->mergeable_rx_bufs) || | |
555 | virtqueue_pop(n->rx_vq, &elem) == 0) { | |
556 | if (i == 0) | |
4f1c942b | 557 | return -1; |
fbe78f4f AL |
558 | fprintf(stderr, "virtio-net truncating packet\n"); |
559 | exit(1); | |
560 | } | |
561 | ||
562 | if (elem.in_num < 1) { | |
563 | fprintf(stderr, "virtio-net receive queue contains no in buffers\n"); | |
564 | exit(1); | |
565 | } | |
566 | ||
567 | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { | |
568 | fprintf(stderr, "virtio-net header not in first element\n"); | |
569 | exit(1); | |
570 | } | |
571 | ||
572 | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); | |
573 | ||
574 | if (i == 0) { | |
575 | if (n->mergeable_rx_bufs) | |
576 | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; | |
577 | ||
578 | offset += receive_header(n, sg, elem.in_num, | |
579 | buf + offset, size - offset, hdr_len); | |
580 | total += hdr_len; | |
581 | } | |
582 | ||
583 | /* copy in packet. ugh */ | |
e4d5639d AS |
584 | len = iov_from_buf(sg, elem.in_num, |
585 | buf + offset, size - offset); | |
fbe78f4f AL |
586 | total += len; |
587 | ||
588 | /* signal other side */ | |
589 | virtqueue_fill(n->rx_vq, &elem, total, i++); | |
590 | ||
591 | offset += len; | |
592 | } | |
593 | ||
594 | if (mhdr) | |
595 | mhdr->num_buffers = i; | |
596 | ||
597 | virtqueue_flush(n->rx_vq, i); | |
598 | virtio_notify(&n->vdev, n->rx_vq); | |
4f1c942b MM |
599 | |
600 | return size; | |
fbe78f4f AL |
601 | } |
602 | ||
6243375f MM |
603 | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
604 | ||
eb6b6c12 | 605 | static void virtio_net_tx_complete(VLANClientState *nc, ssize_t len) |
6243375f | 606 | { |
eb6b6c12 | 607 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
6243375f MM |
608 | |
609 | virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); | |
610 | virtio_notify(&n->vdev, n->tx_vq); | |
611 | ||
612 | n->async_tx.elem.out_num = n->async_tx.len = 0; | |
613 | ||
614 | virtio_queue_set_notification(n->tx_vq, 1); | |
615 | virtio_net_flush_tx(n, n->tx_vq); | |
616 | } | |
617 | ||
fbe78f4f AL |
618 | /* TX */ |
619 | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) | |
620 | { | |
621 | VirtQueueElement elem; | |
fbe78f4f AL |
622 | |
623 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
624 | return; | |
625 | ||
6243375f MM |
626 | if (n->async_tx.elem.out_num) { |
627 | virtio_queue_set_notification(n->tx_vq, 0); | |
628 | return; | |
629 | } | |
630 | ||
fbe78f4f | 631 | while (virtqueue_pop(vq, &elem)) { |
6243375f | 632 | ssize_t ret, len = 0; |
fbe78f4f AL |
633 | unsigned int out_num = elem.out_num; |
634 | struct iovec *out_sg = &elem.out_sg[0]; | |
635 | unsigned hdr_len; | |
636 | ||
637 | /* hdr_len refers to the header received from the guest */ | |
638 | hdr_len = n->mergeable_rx_bufs ? | |
639 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : | |
640 | sizeof(struct virtio_net_hdr); | |
641 | ||
642 | if (out_num < 1 || out_sg->iov_len != hdr_len) { | |
643 | fprintf(stderr, "virtio-net header not in first element\n"); | |
644 | exit(1); | |
645 | } | |
646 | ||
647 | /* ignore the header if GSO is not supported */ | |
3a330134 | 648 | if (!n->has_vnet_hdr) { |
fbe78f4f AL |
649 | out_num--; |
650 | out_sg++; | |
651 | len += hdr_len; | |
652 | } else if (n->mergeable_rx_bufs) { | |
653 | /* tapfd expects a struct virtio_net_hdr */ | |
654 | hdr_len -= sizeof(struct virtio_net_hdr); | |
655 | out_sg->iov_len -= hdr_len; | |
656 | len += hdr_len; | |
657 | } | |
658 | ||
eb6b6c12 | 659 | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
6243375f MM |
660 | virtio_net_tx_complete); |
661 | if (ret == 0) { | |
662 | virtio_queue_set_notification(n->tx_vq, 0); | |
663 | n->async_tx.elem = elem; | |
664 | n->async_tx.len = len; | |
665 | return; | |
666 | } | |
667 | ||
668 | len += ret; | |
fbe78f4f AL |
669 | |
670 | virtqueue_push(vq, &elem, len); | |
671 | virtio_notify(&n->vdev, vq); | |
672 | } | |
673 | } | |
674 | ||
675 | static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) | |
676 | { | |
677 | VirtIONet *n = to_virtio_net(vdev); | |
678 | ||
679 | if (n->tx_timer_active) { | |
680 | virtio_queue_set_notification(vq, 1); | |
681 | qemu_del_timer(n->tx_timer); | |
682 | n->tx_timer_active = 0; | |
683 | virtio_net_flush_tx(n, vq); | |
684 | } else { | |
685 | qemu_mod_timer(n->tx_timer, | |
686 | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); | |
687 | n->tx_timer_active = 1; | |
688 | virtio_queue_set_notification(vq, 0); | |
689 | } | |
690 | } | |
691 | ||
692 | static void virtio_net_tx_timer(void *opaque) | |
693 | { | |
694 | VirtIONet *n = opaque; | |
695 | ||
696 | n->tx_timer_active = 0; | |
697 | ||
698 | /* Just in case the driver is not ready on more */ | |
699 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
700 | return; | |
701 | ||
702 | virtio_queue_set_notification(n->tx_vq, 1); | |
703 | virtio_net_flush_tx(n, n->tx_vq); | |
704 | } | |
705 | ||
706 | static void virtio_net_save(QEMUFile *f, void *opaque) | |
707 | { | |
708 | VirtIONet *n = opaque; | |
709 | ||
9bc6304c MT |
710 | if (n->vhost_started) { |
711 | /* TODO: should we really stop the backend? | |
712 | * If we don't, it might keep writing to memory. */ | |
713 | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); | |
714 | n->vhost_started = 0; | |
715 | } | |
fbe78f4f AL |
716 | virtio_save(&n->vdev, f); |
717 | ||
79674068 | 718 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
fbe78f4f | 719 | qemu_put_be32(f, n->tx_timer_active); |
e46cb38f | 720 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 721 | qemu_put_be16(f, n->status); |
f10c592e AW |
722 | qemu_put_byte(f, n->promisc); |
723 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
724 | qemu_put_be32(f, n->mac_table.in_use); |
725 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 726 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 727 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
728 | qemu_put_byte(f, n->mac_table.multi_overflow); |
729 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
730 | qemu_put_byte(f, n->alluni); |
731 | qemu_put_byte(f, n->nomulti); | |
732 | qemu_put_byte(f, n->nouni); | |
733 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 734 | qemu_put_byte(f, n->has_ufo); |
fbe78f4f AL |
735 | } |
736 | ||
737 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
738 | { | |
739 | VirtIONet *n = opaque; | |
2d9aba39 | 740 | int i; |
fbe78f4f | 741 | |
9d6271b8 | 742 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
743 | return -EINVAL; |
744 | ||
745 | virtio_load(&n->vdev, f); | |
746 | ||
79674068 | 747 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
fbe78f4f | 748 | n->tx_timer_active = qemu_get_be32(f); |
e46cb38f | 749 | n->mergeable_rx_bufs = qemu_get_be32(f); |
fbe78f4f | 750 | |
9d6271b8 AL |
751 | if (version_id >= 3) |
752 | n->status = qemu_get_be16(f); | |
753 | ||
002437cd | 754 | if (version_id >= 4) { |
f10c592e AW |
755 | if (version_id < 8) { |
756 | n->promisc = qemu_get_be32(f); | |
757 | n->allmulti = qemu_get_be32(f); | |
758 | } else { | |
759 | n->promisc = qemu_get_byte(f); | |
760 | n->allmulti = qemu_get_byte(f); | |
761 | } | |
002437cd AL |
762 | } |
763 | ||
b6503ed9 AL |
764 | if (version_id >= 5) { |
765 | n->mac_table.in_use = qemu_get_be32(f); | |
766 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
767 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
768 | qemu_get_buffer(f, n->mac_table.macs, | |
769 | n->mac_table.in_use * ETH_ALEN); | |
770 | } else if (n->mac_table.in_use) { | |
771 | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); | |
8fd2a2f1 | 772 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
773 | n->mac_table.in_use = 0; |
774 | } | |
775 | } | |
776 | ||
f21c0ed9 AL |
777 | if (version_id >= 6) |
778 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
779 | ||
3a330134 MM |
780 | if (version_id >= 7) { |
781 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 782 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
783 | return -1; |
784 | } | |
785 | ||
786 | if (n->has_vnet_hdr) { | |
eb6b6c12 MM |
787 | tap_using_vnet_hdr(n->nic->nc.peer, 1); |
788 | tap_set_offload(n->nic->nc.peer, | |
704a76fc MT |
789 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
790 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
791 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
792 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1, | |
793 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
3a330134 | 794 | } |
6c042c16 AW |
795 | } |
796 | ||
8fd2a2f1 AW |
797 | if (version_id >= 9) { |
798 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
799 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
800 | } | |
801 | ||
015cb166 AW |
802 | if (version_id >= 10) { |
803 | n->alluni = qemu_get_byte(f); | |
804 | n->nomulti = qemu_get_byte(f); | |
805 | n->nouni = qemu_get_byte(f); | |
806 | n->nobcast = qemu_get_byte(f); | |
807 | } | |
808 | ||
0ce0e8f4 MM |
809 | if (version_id >= 11) { |
810 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 811 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
812 | return -1; |
813 | } | |
814 | } | |
815 | ||
2d9aba39 AW |
816 | /* Find the first multicast entry in the saved MAC filter */ |
817 | for (i = 0; i < n->mac_table.in_use; i++) { | |
818 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
819 | break; | |
820 | } | |
821 | } | |
822 | n->mac_table.first_multi = i; | |
823 | ||
fbe78f4f AL |
824 | if (n->tx_timer_active) { |
825 | qemu_mod_timer(n->tx_timer, | |
826 | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); | |
827 | } | |
fbe78f4f AL |
828 | return 0; |
829 | } | |
830 | ||
eb6b6c12 | 831 | static void virtio_net_cleanup(VLANClientState *nc) |
b946a153 | 832 | { |
eb6b6c12 | 833 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
b946a153 | 834 | |
eb6b6c12 | 835 | n->nic = NULL; |
b946a153 AL |
836 | } |
837 | ||
eb6b6c12 MM |
838 | static NetClientInfo net_virtio_info = { |
839 | .type = NET_CLIENT_TYPE_NIC, | |
840 | .size = sizeof(NICState), | |
841 | .can_receive = virtio_net_can_receive, | |
842 | .receive = virtio_net_receive, | |
843 | .cleanup = virtio_net_cleanup, | |
844 | .link_status_changed = virtio_net_set_link_status, | |
845 | }; | |
846 | ||
9bc6304c MT |
847 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
848 | { | |
849 | VirtIONet *n = to_virtio_net(vdev); | |
850 | if (!n->nic->nc.peer) { | |
851 | return; | |
852 | } | |
853 | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { | |
854 | return; | |
855 | } | |
856 | ||
857 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
858 | return; | |
859 | } | |
860 | if (!!n->vhost_started == !!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { | |
861 | return; | |
862 | } | |
863 | if (status & VIRTIO_CONFIG_S_DRIVER_OK) { | |
864 | int r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), vdev); | |
865 | if (r < 0) { | |
866 | fprintf(stderr, "unable to start vhost net: %d: " | |
867 | "falling back on userspace virtio\n", -r); | |
868 | } else { | |
869 | n->vhost_started = 1; | |
870 | } | |
871 | } else { | |
872 | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); | |
873 | n->vhost_started = 0; | |
874 | } | |
875 | } | |
876 | ||
877 | static void virtio_net_vmstate_change(void *opaque, int running, int reason) | |
878 | { | |
879 | VirtIONet *n = opaque; | |
880 | if (!running) { | |
881 | return; | |
882 | } | |
883 | /* This is called when vm is started, it will start vhost backend if | |
884 | * appropriate e.g. after migration. */ | |
885 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
886 | } | |
887 | ||
97b15621 | 888 | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf) |
fbe78f4f AL |
889 | { |
890 | VirtIONet *n; | |
891 | static int virtio_net_id; | |
892 | ||
53c25cea PB |
893 | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, |
894 | sizeof(struct virtio_net_config), | |
895 | sizeof(VirtIONet)); | |
fbe78f4f | 896 | |
0f03eca6 AL |
897 | n->vdev.get_config = virtio_net_get_config; |
898 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
899 | n->vdev.get_features = virtio_net_get_features; |
900 | n->vdev.set_features = virtio_net_set_features; | |
8eca6b1b | 901 | n->vdev.bad_features = virtio_net_bad_features; |
002437cd | 902 | n->vdev.reset = virtio_net_reset; |
9bc6304c | 903 | n->vdev.set_status = virtio_net_set_status; |
fbe78f4f AL |
904 | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
905 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx); | |
4ffb17f5 | 906 | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); |
97b15621 | 907 | qemu_macaddr_default_if_unset(&conf->macaddr); |
3cbe04c4 | 908 | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
554c97dd | 909 | n->status = VIRTIO_NET_S_LINK_UP; |
fbe78f4f | 910 | |
eb6b6c12 MM |
911 | n->nic = qemu_new_nic(&net_virtio_info, conf, dev->info->name, dev->id, n); |
912 | ||
913 | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); | |
96d5e201 | 914 | |
fbe78f4f AL |
915 | n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
916 | n->tx_timer_active = 0; | |
917 | n->mergeable_rx_bufs = 0; | |
002437cd | 918 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 919 | |
b6503ed9 | 920 | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 921 | |
f21c0ed9 | 922 | n->vlans = qemu_mallocz(MAX_VLAN >> 3); |
f21c0ed9 | 923 | |
9d6271b8 | 924 | register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION, |
fbe78f4f | 925 | virtio_net_save, virtio_net_load, n); |
9bc6304c | 926 | n->vmstate = qemu_add_vm_change_state_handler(virtio_net_vmstate_change, n); |
cf21e106 | 927 | |
53c25cea | 928 | return &n->vdev; |
cf21e106 | 929 | } |
97b15621 GH |
930 | |
931 | void virtio_net_exit(VirtIODevice *vdev) | |
932 | { | |
933 | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); | |
9bc6304c MT |
934 | qemu_del_vm_change_state_handler(n->vmstate); |
935 | ||
936 | if (n->vhost_started) { | |
937 | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); | |
938 | } | |
97b15621 | 939 | |
eb6b6c12 | 940 | qemu_purge_queued_packets(&n->nic->nc); |
97b15621 GH |
941 | |
942 | unregister_savevm("virtio-net", n); | |
943 | ||
944 | qemu_free(n->mac_table.macs); | |
945 | qemu_free(n->vlans); | |
946 | ||
947 | qemu_del_timer(n->tx_timer); | |
948 | qemu_free_timer(n->tx_timer); | |
949 | ||
950 | virtio_cleanup(&n->vdev); | |
eb6b6c12 | 951 | qemu_del_vlan_client(&n->nic->nc); |
97b15621 | 952 | } |