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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 | ||
1de7afc9 | 14 | #include "qemu/iov.h" |
0d09e41a | 15 | #include "hw/virtio/virtio.h" |
1422e32d | 16 | #include "net/net.h" |
7200ac3c | 17 | #include "net/checksum.h" |
a8ed73f7 | 18 | #include "net/tap.h" |
1de7afc9 PB |
19 | #include "qemu/error-report.h" |
20 | #include "qemu/timer.h" | |
0d09e41a PB |
21 | #include "hw/virtio/virtio-net.h" |
22 | #include "net/vhost_net.h" | |
17ec5a86 | 23 | #include "hw/virtio/virtio-bus.h" |
b1be4280 | 24 | #include "qapi/qmp/qjson.h" |
06150279 | 25 | #include "qapi-event.h" |
1399c60d | 26 | #include "hw/virtio/virtio-access.h" |
fbe78f4f | 27 | |
0ce0e8f4 | 28 | #define VIRTIO_NET_VM_VERSION 11 |
b6503ed9 | 29 | |
4ffb17f5 | 30 | #define MAC_TABLE_ENTRIES 64 |
f21c0ed9 | 31 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 32 | |
14f9b664 JL |
33 | /* |
34 | * Calculate the number of bytes up to and including the given 'field' of | |
35 | * 'container'. | |
36 | */ | |
37 | #define endof(container, field) \ | |
38 | (offsetof(container, field) + sizeof(((container *)0)->field)) | |
39 | ||
40 | typedef struct VirtIOFeature { | |
41 | uint32_t flags; | |
42 | size_t end; | |
43 | } VirtIOFeature; | |
44 | ||
45 | static VirtIOFeature feature_sizes[] = { | |
46 | {.flags = 1 << VIRTIO_NET_F_MAC, | |
47 | .end = endof(struct virtio_net_config, mac)}, | |
48 | {.flags = 1 << VIRTIO_NET_F_STATUS, | |
49 | .end = endof(struct virtio_net_config, status)}, | |
50 | {.flags = 1 << VIRTIO_NET_F_MQ, | |
51 | .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, | |
52 | {} | |
53 | }; | |
54 | ||
fed699f9 | 55 | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) |
0c87e93e JW |
56 | { |
57 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
58 | ||
fed699f9 | 59 | return &n->vqs[nc->queue_index]; |
0c87e93e | 60 | } |
fed699f9 JW |
61 | |
62 | static int vq2q(int queue_index) | |
63 | { | |
64 | return queue_index / 2; | |
65 | } | |
66 | ||
fbe78f4f AL |
67 | /* TODO |
68 | * - we could suppress RX interrupt if we were so inclined. | |
69 | */ | |
70 | ||
0f03eca6 | 71 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f | 72 | { |
17a0ca55 | 73 | VirtIONet *n = VIRTIO_NET(vdev); |
fbe78f4f AL |
74 | struct virtio_net_config netcfg; |
75 | ||
1399c60d RR |
76 | virtio_stw_p(vdev, &netcfg.status, n->status); |
77 | virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); | |
79674068 | 78 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
14f9b664 | 79 | memcpy(config, &netcfg, n->config_size); |
fbe78f4f AL |
80 | } |
81 | ||
0f03eca6 AL |
82 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
83 | { | |
17a0ca55 | 84 | VirtIONet *n = VIRTIO_NET(vdev); |
14f9b664 | 85 | struct virtio_net_config netcfg = {}; |
0f03eca6 | 86 | |
14f9b664 | 87 | memcpy(&netcfg, config, n->config_size); |
0f03eca6 | 88 | |
17a0ca55 | 89 | if (!(vdev->guest_features >> VIRTIO_NET_F_CTRL_MAC_ADDR & 1) && |
c1943a3f | 90 | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
79674068 | 91 | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
b356f76d | 92 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
0f03eca6 AL |
93 | } |
94 | } | |
95 | ||
783e7706 MT |
96 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
97 | { | |
17a0ca55 | 98 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
783e7706 | 99 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && |
17a0ca55 | 100 | (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; |
783e7706 MT |
101 | } |
102 | ||
f57fcf70 JW |
103 | static void virtio_net_announce_timer(void *opaque) |
104 | { | |
105 | VirtIONet *n = opaque; | |
106 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
107 | ||
108 | n->announce_counter--; | |
109 | n->status |= VIRTIO_NET_S_ANNOUNCE; | |
110 | virtio_notify_config(vdev); | |
111 | } | |
112 | ||
783e7706 | 113 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
afbaa7b4 | 114 | { |
17a0ca55 | 115 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b356f76d | 116 | NetClientState *nc = qemu_get_queue(n->nic); |
fed699f9 | 117 | int queues = n->multiqueue ? n->max_queues : 1; |
b356f76d | 118 | |
ed8b4afe | 119 | if (!get_vhost_net(nc->peer)) { |
afbaa7b4 MT |
120 | return; |
121 | } | |
fed699f9 | 122 | |
d7108d90 JW |
123 | if (!!n->vhost_started == |
124 | (virtio_net_started(n, status) && !nc->peer->link_down)) { | |
afbaa7b4 MT |
125 | return; |
126 | } | |
127 | if (!n->vhost_started) { | |
086abc1c MT |
128 | int r, i; |
129 | ||
ed8b4afe | 130 | if (!vhost_net_query(get_vhost_net(nc->peer), vdev)) { |
5430a28f MT |
131 | return; |
132 | } | |
086abc1c MT |
133 | |
134 | /* Any packets outstanding? Purge them to avoid touching rings | |
135 | * when vhost is running. | |
136 | */ | |
137 | for (i = 0; i < queues; i++) { | |
138 | NetClientState *qnc = qemu_get_subqueue(n->nic, i); | |
139 | ||
140 | /* Purge both directions: TX and RX. */ | |
141 | qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); | |
142 | qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); | |
143 | } | |
144 | ||
1830b80f | 145 | n->vhost_started = 1; |
17a0ca55 | 146 | r = vhost_net_start(vdev, n->nic->ncs, queues); |
afbaa7b4 | 147 | if (r < 0) { |
e7b43f7e SH |
148 | error_report("unable to start vhost net: %d: " |
149 | "falling back on userspace virtio", -r); | |
1830b80f | 150 | n->vhost_started = 0; |
afbaa7b4 MT |
151 | } |
152 | } else { | |
17a0ca55 | 153 | vhost_net_stop(vdev, n->nic->ncs, queues); |
afbaa7b4 MT |
154 | n->vhost_started = 0; |
155 | } | |
156 | } | |
157 | ||
783e7706 MT |
158 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
159 | { | |
17a0ca55 | 160 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
161 | VirtIONetQueue *q; |
162 | int i; | |
163 | uint8_t queue_status; | |
783e7706 MT |
164 | |
165 | virtio_net_vhost_status(n, status); | |
166 | ||
fed699f9 JW |
167 | for (i = 0; i < n->max_queues; i++) { |
168 | q = &n->vqs[i]; | |
783e7706 | 169 | |
fed699f9 JW |
170 | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
171 | queue_status = 0; | |
783e7706 | 172 | } else { |
fed699f9 | 173 | queue_status = status; |
783e7706 | 174 | } |
fed699f9 JW |
175 | |
176 | if (!q->tx_waiting) { | |
177 | continue; | |
178 | } | |
179 | ||
180 | if (virtio_net_started(n, queue_status) && !n->vhost_started) { | |
181 | if (q->tx_timer) { | |
bc72ad67 AB |
182 | timer_mod(q->tx_timer, |
183 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
fed699f9 JW |
184 | } else { |
185 | qemu_bh_schedule(q->tx_bh); | |
186 | } | |
783e7706 | 187 | } else { |
fed699f9 | 188 | if (q->tx_timer) { |
bc72ad67 | 189 | timer_del(q->tx_timer); |
fed699f9 JW |
190 | } else { |
191 | qemu_bh_cancel(q->tx_bh); | |
192 | } | |
783e7706 MT |
193 | } |
194 | } | |
195 | } | |
196 | ||
4e68f7a0 | 197 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 198 | { |
cc1f0f45 | 199 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 200 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
554c97dd AL |
201 | uint16_t old_status = n->status; |
202 | ||
eb6b6c12 | 203 | if (nc->link_down) |
554c97dd AL |
204 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
205 | else | |
206 | n->status |= VIRTIO_NET_S_LINK_UP; | |
207 | ||
208 | if (n->status != old_status) | |
17a0ca55 | 209 | virtio_notify_config(vdev); |
afbaa7b4 | 210 | |
17a0ca55 | 211 | virtio_net_set_status(vdev, vdev->status); |
554c97dd AL |
212 | } |
213 | ||
b1be4280 AK |
214 | static void rxfilter_notify(NetClientState *nc) |
215 | { | |
b1be4280 AK |
216 | VirtIONet *n = qemu_get_nic_opaque(nc); |
217 | ||
218 | if (nc->rxfilter_notify_enabled) { | |
96e35046 | 219 | gchar *path = object_get_canonical_path(OBJECT(n->qdev)); |
06150279 WX |
220 | qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, |
221 | n->netclient_name, path, &error_abort); | |
96e35046 | 222 | g_free(path); |
b1be4280 AK |
223 | |
224 | /* disable event notification to avoid events flooding */ | |
225 | nc->rxfilter_notify_enabled = 0; | |
226 | } | |
227 | } | |
228 | ||
229 | static char *mac_strdup_printf(const uint8_t *mac) | |
230 | { | |
231 | return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", mac[0], | |
232 | mac[1], mac[2], mac[3], mac[4], mac[5]); | |
233 | } | |
234 | ||
f7bc8ef8 AK |
235 | static intList *get_vlan_table(VirtIONet *n) |
236 | { | |
237 | intList *list, *entry; | |
238 | int i, j; | |
239 | ||
240 | list = NULL; | |
241 | for (i = 0; i < MAX_VLAN >> 5; i++) { | |
242 | for (j = 0; n->vlans[i] && j <= 0x1f; j++) { | |
243 | if (n->vlans[i] & (1U << j)) { | |
244 | entry = g_malloc0(sizeof(*entry)); | |
245 | entry->value = (i << 5) + j; | |
246 | entry->next = list; | |
247 | list = entry; | |
248 | } | |
249 | } | |
250 | } | |
251 | ||
252 | return list; | |
253 | } | |
254 | ||
b1be4280 AK |
255 | static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) |
256 | { | |
257 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
f7bc8ef8 | 258 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b1be4280 AK |
259 | RxFilterInfo *info; |
260 | strList *str_list, *entry; | |
f7bc8ef8 | 261 | int i; |
b1be4280 AK |
262 | |
263 | info = g_malloc0(sizeof(*info)); | |
264 | info->name = g_strdup(nc->name); | |
265 | info->promiscuous = n->promisc; | |
266 | ||
267 | if (n->nouni) { | |
268 | info->unicast = RX_STATE_NONE; | |
269 | } else if (n->alluni) { | |
270 | info->unicast = RX_STATE_ALL; | |
271 | } else { | |
272 | info->unicast = RX_STATE_NORMAL; | |
273 | } | |
274 | ||
275 | if (n->nomulti) { | |
276 | info->multicast = RX_STATE_NONE; | |
277 | } else if (n->allmulti) { | |
278 | info->multicast = RX_STATE_ALL; | |
279 | } else { | |
280 | info->multicast = RX_STATE_NORMAL; | |
281 | } | |
282 | ||
283 | info->broadcast_allowed = n->nobcast; | |
284 | info->multicast_overflow = n->mac_table.multi_overflow; | |
285 | info->unicast_overflow = n->mac_table.uni_overflow; | |
286 | ||
287 | info->main_mac = mac_strdup_printf(n->mac); | |
288 | ||
289 | str_list = NULL; | |
290 | for (i = 0; i < n->mac_table.first_multi; i++) { | |
291 | entry = g_malloc0(sizeof(*entry)); | |
292 | entry->value = mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); | |
293 | entry->next = str_list; | |
294 | str_list = entry; | |
295 | } | |
296 | info->unicast_table = str_list; | |
297 | ||
298 | str_list = NULL; | |
299 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
300 | entry = g_malloc0(sizeof(*entry)); | |
301 | entry->value = mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); | |
302 | entry->next = str_list; | |
303 | str_list = entry; | |
304 | } | |
305 | info->multicast_table = str_list; | |
f7bc8ef8 | 306 | info->vlan_table = get_vlan_table(n); |
b1be4280 | 307 | |
f7bc8ef8 AK |
308 | if (!((1 << VIRTIO_NET_F_CTRL_VLAN) & vdev->guest_features)) { |
309 | info->vlan = RX_STATE_ALL; | |
310 | } else if (!info->vlan_table) { | |
311 | info->vlan = RX_STATE_NONE; | |
312 | } else { | |
313 | info->vlan = RX_STATE_NORMAL; | |
b1be4280 | 314 | } |
b1be4280 AK |
315 | |
316 | /* enable event notification after query */ | |
317 | nc->rxfilter_notify_enabled = 1; | |
318 | ||
319 | return info; | |
320 | } | |
321 | ||
002437cd AL |
322 | static void virtio_net_reset(VirtIODevice *vdev) |
323 | { | |
17a0ca55 | 324 | VirtIONet *n = VIRTIO_NET(vdev); |
002437cd AL |
325 | |
326 | /* Reset back to compatibility mode */ | |
327 | n->promisc = 1; | |
328 | n->allmulti = 0; | |
015cb166 AW |
329 | n->alluni = 0; |
330 | n->nomulti = 0; | |
331 | n->nouni = 0; | |
332 | n->nobcast = 0; | |
fed699f9 JW |
333 | /* multiqueue is disabled by default */ |
334 | n->curr_queues = 1; | |
f57fcf70 JW |
335 | timer_del(n->announce_timer); |
336 | n->announce_counter = 0; | |
337 | n->status &= ~VIRTIO_NET_S_ANNOUNCE; | |
b6503ed9 | 338 | |
f21c0ed9 | 339 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 340 | n->mac_table.in_use = 0; |
2d9aba39 | 341 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
342 | n->mac_table.multi_overflow = 0; |
343 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 344 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
41dc8a67 | 345 | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
702d66a8 | 346 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
f21c0ed9 | 347 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
348 | } |
349 | ||
6e371ab8 | 350 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 351 | { |
b356f76d JW |
352 | NetClientState *nc = qemu_get_queue(n->nic); |
353 | if (!nc->peer) { | |
6e371ab8 | 354 | return; |
b356f76d | 355 | } |
3a330134 | 356 | |
d6085e3a | 357 | n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); |
6e371ab8 | 358 | } |
3a330134 | 359 | |
6e371ab8 MT |
360 | static int peer_has_vnet_hdr(VirtIONet *n) |
361 | { | |
3a330134 MM |
362 | return n->has_vnet_hdr; |
363 | } | |
364 | ||
0ce0e8f4 MM |
365 | static int peer_has_ufo(VirtIONet *n) |
366 | { | |
367 | if (!peer_has_vnet_hdr(n)) | |
368 | return 0; | |
369 | ||
d6085e3a | 370 | n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); |
0ce0e8f4 MM |
371 | |
372 | return n->has_ufo; | |
373 | } | |
374 | ||
ff3a8066 MT |
375 | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) |
376 | { | |
fed699f9 JW |
377 | int i; |
378 | NetClientState *nc; | |
379 | ||
ff3a8066 MT |
380 | n->mergeable_rx_bufs = mergeable_rx_bufs; |
381 | ||
382 | n->guest_hdr_len = n->mergeable_rx_bufs ? | |
383 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
384 | ||
fed699f9 JW |
385 | for (i = 0; i < n->max_queues; i++) { |
386 | nc = qemu_get_subqueue(n->nic, i); | |
387 | ||
388 | if (peer_has_vnet_hdr(n) && | |
d6085e3a SH |
389 | qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { |
390 | qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); | |
fed699f9 JW |
391 | n->host_hdr_len = n->guest_hdr_len; |
392 | } | |
ff3a8066 MT |
393 | } |
394 | } | |
395 | ||
fed699f9 JW |
396 | static int peer_attach(VirtIONet *n, int index) |
397 | { | |
398 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
399 | ||
400 | if (!nc->peer) { | |
401 | return 0; | |
402 | } | |
403 | ||
404 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
405 | return 0; | |
406 | } | |
407 | ||
408 | return tap_enable(nc->peer); | |
409 | } | |
410 | ||
411 | static int peer_detach(VirtIONet *n, int index) | |
412 | { | |
413 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
414 | ||
415 | if (!nc->peer) { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
420 | return 0; | |
421 | } | |
422 | ||
423 | return tap_disable(nc->peer); | |
424 | } | |
425 | ||
426 | static void virtio_net_set_queues(VirtIONet *n) | |
427 | { | |
428 | int i; | |
ddfa83ea | 429 | int r; |
fed699f9 JW |
430 | |
431 | for (i = 0; i < n->max_queues; i++) { | |
432 | if (i < n->curr_queues) { | |
ddfa83ea JS |
433 | r = peer_attach(n, i); |
434 | assert(!r); | |
fed699f9 | 435 | } else { |
ddfa83ea JS |
436 | r = peer_detach(n, i); |
437 | assert(!r); | |
fed699f9 JW |
438 | } |
439 | } | |
440 | } | |
441 | ||
ec57db16 | 442 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); |
fed699f9 | 443 | |
8172539d | 444 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 445 | { |
17a0ca55 | 446 | VirtIONet *n = VIRTIO_NET(vdev); |
b356f76d | 447 | NetClientState *nc = qemu_get_queue(n->nic); |
fbe78f4f | 448 | |
c9f79a3f MT |
449 | features |= (1 << VIRTIO_NET_F_MAC); |
450 | ||
6e371ab8 | 451 | if (!peer_has_vnet_hdr(n)) { |
8172539d MT |
452 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); |
453 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
454 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
455 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
456 | ||
457 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
458 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
459 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
460 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
461 | } | |
3a330134 | 462 | |
8172539d MT |
463 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
464 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
465 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
466 | } |
467 | ||
ed8b4afe | 468 | if (!get_vhost_net(nc->peer)) { |
9bc6304c MT |
469 | return features; |
470 | } | |
ed8b4afe | 471 | return vhost_net_get_features(get_vhost_net(nc->peer), features); |
fbe78f4f AL |
472 | } |
473 | ||
8eca6b1b AL |
474 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
475 | { | |
476 | uint32_t features = 0; | |
477 | ||
478 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
479 | * but also these: */ | |
480 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
481 | features |= (1 << VIRTIO_NET_F_CSUM); |
482 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
483 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
484 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 485 | |
8172539d | 486 | return features; |
8eca6b1b AL |
487 | } |
488 | ||
644c9858 DF |
489 | static void virtio_net_apply_guest_offloads(VirtIONet *n) |
490 | { | |
ad37bb3b | 491 | qemu_set_offload(qemu_get_queue(n->nic)->peer, |
644c9858 DF |
492 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), |
493 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), | |
494 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), | |
495 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), | |
496 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); | |
497 | } | |
498 | ||
499 | static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) | |
500 | { | |
501 | static const uint64_t guest_offloads_mask = | |
502 | (1ULL << VIRTIO_NET_F_GUEST_CSUM) | | |
503 | (1ULL << VIRTIO_NET_F_GUEST_TSO4) | | |
504 | (1ULL << VIRTIO_NET_F_GUEST_TSO6) | | |
505 | (1ULL << VIRTIO_NET_F_GUEST_ECN) | | |
506 | (1ULL << VIRTIO_NET_F_GUEST_UFO); | |
507 | ||
508 | return guest_offloads_mask & features; | |
509 | } | |
510 | ||
511 | static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) | |
512 | { | |
513 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
514 | return virtio_net_guest_offloads_by_features(vdev->guest_features); | |
515 | } | |
516 | ||
fbe78f4f AL |
517 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
518 | { | |
17a0ca55 | 519 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
520 | int i; |
521 | ||
ec57db16 | 522 | virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ))); |
fbe78f4f | 523 | |
ff3a8066 | 524 | virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF))); |
f5436dd9 MM |
525 | |
526 | if (n->has_vnet_hdr) { | |
644c9858 DF |
527 | n->curr_guest_offloads = |
528 | virtio_net_guest_offloads_by_features(features); | |
529 | virtio_net_apply_guest_offloads(n); | |
f5436dd9 | 530 | } |
fed699f9 JW |
531 | |
532 | for (i = 0; i < n->max_queues; i++) { | |
533 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
534 | ||
ed8b4afe | 535 | if (!get_vhost_net(nc->peer)) { |
fed699f9 JW |
536 | continue; |
537 | } | |
ed8b4afe | 538 | vhost_net_ack_features(get_vhost_net(nc->peer), features); |
dc14a397 | 539 | } |
0b1eaa88 SF |
540 | |
541 | if ((1 << VIRTIO_NET_F_CTRL_VLAN) & features) { | |
542 | memset(n->vlans, 0, MAX_VLAN >> 3); | |
543 | } else { | |
544 | memset(n->vlans, 0xff, MAX_VLAN >> 3); | |
545 | } | |
fbe78f4f AL |
546 | } |
547 | ||
002437cd | 548 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 549 | struct iovec *iov, unsigned int iov_cnt) |
002437cd AL |
550 | { |
551 | uint8_t on; | |
921ac5d0 | 552 | size_t s; |
b1be4280 | 553 | NetClientState *nc = qemu_get_queue(n->nic); |
002437cd | 554 | |
921ac5d0 MT |
555 | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
556 | if (s != sizeof(on)) { | |
557 | return VIRTIO_NET_ERR; | |
002437cd AL |
558 | } |
559 | ||
dd23454b | 560 | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { |
002437cd | 561 | n->promisc = on; |
dd23454b | 562 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
002437cd | 563 | n->allmulti = on; |
dd23454b | 564 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
015cb166 | 565 | n->alluni = on; |
dd23454b | 566 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
015cb166 | 567 | n->nomulti = on; |
dd23454b | 568 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
015cb166 | 569 | n->nouni = on; |
dd23454b | 570 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
015cb166 | 571 | n->nobcast = on; |
921ac5d0 | 572 | } else { |
002437cd | 573 | return VIRTIO_NET_ERR; |
921ac5d0 | 574 | } |
002437cd | 575 | |
b1be4280 AK |
576 | rxfilter_notify(nc); |
577 | ||
002437cd AL |
578 | return VIRTIO_NET_OK; |
579 | } | |
580 | ||
644c9858 DF |
581 | static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, |
582 | struct iovec *iov, unsigned int iov_cnt) | |
583 | { | |
584 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
585 | uint64_t offloads; | |
586 | size_t s; | |
587 | ||
588 | if (!((1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) & vdev->guest_features)) { | |
589 | return VIRTIO_NET_ERR; | |
590 | } | |
591 | ||
592 | s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); | |
593 | if (s != sizeof(offloads)) { | |
594 | return VIRTIO_NET_ERR; | |
595 | } | |
596 | ||
597 | if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { | |
598 | uint64_t supported_offloads; | |
599 | ||
600 | if (!n->has_vnet_hdr) { | |
601 | return VIRTIO_NET_ERR; | |
602 | } | |
603 | ||
604 | supported_offloads = virtio_net_supported_guest_offloads(n); | |
605 | if (offloads & ~supported_offloads) { | |
606 | return VIRTIO_NET_ERR; | |
607 | } | |
608 | ||
609 | n->curr_guest_offloads = offloads; | |
610 | virtio_net_apply_guest_offloads(n); | |
611 | ||
612 | return VIRTIO_NET_OK; | |
613 | } else { | |
614 | return VIRTIO_NET_ERR; | |
615 | } | |
616 | } | |
617 | ||
b6503ed9 | 618 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 619 | struct iovec *iov, unsigned int iov_cnt) |
b6503ed9 | 620 | { |
1399c60d | 621 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b6503ed9 | 622 | struct virtio_net_ctrl_mac mac_data; |
921ac5d0 | 623 | size_t s; |
b1be4280 | 624 | NetClientState *nc = qemu_get_queue(n->nic); |
b6503ed9 | 625 | |
c1943a3f AK |
626 | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { |
627 | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { | |
628 | return VIRTIO_NET_ERR; | |
629 | } | |
630 | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); | |
631 | assert(s == sizeof(n->mac)); | |
b356f76d | 632 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
b1be4280 AK |
633 | rxfilter_notify(nc); |
634 | ||
c1943a3f AK |
635 | return VIRTIO_NET_OK; |
636 | } | |
637 | ||
921ac5d0 | 638 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { |
b6503ed9 | 639 | return VIRTIO_NET_ERR; |
921ac5d0 | 640 | } |
b6503ed9 | 641 | |
cae2e556 AK |
642 | int in_use = 0; |
643 | int first_multi = 0; | |
644 | uint8_t uni_overflow = 0; | |
645 | uint8_t multi_overflow = 0; | |
646 | uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); | |
b6503ed9 | 647 | |
921ac5d0 MT |
648 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
649 | sizeof(mac_data.entries)); | |
1399c60d | 650 | mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); |
921ac5d0 | 651 | if (s != sizeof(mac_data.entries)) { |
b1be4280 | 652 | goto error; |
921ac5d0 MT |
653 | } |
654 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 655 | |
921ac5d0 | 656 | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { |
b1be4280 | 657 | goto error; |
921ac5d0 | 658 | } |
b6503ed9 AL |
659 | |
660 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
cae2e556 | 661 | s = iov_to_buf(iov, iov_cnt, 0, macs, |
921ac5d0 MT |
662 | mac_data.entries * ETH_ALEN); |
663 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 664 | goto error; |
921ac5d0 | 665 | } |
cae2e556 | 666 | in_use += mac_data.entries; |
b6503ed9 | 667 | } else { |
cae2e556 | 668 | uni_overflow = 1; |
b6503ed9 AL |
669 | } |
670 | ||
921ac5d0 MT |
671 | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
672 | ||
cae2e556 | 673 | first_multi = in_use; |
2d9aba39 | 674 | |
921ac5d0 MT |
675 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
676 | sizeof(mac_data.entries)); | |
1399c60d | 677 | mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); |
921ac5d0 | 678 | if (s != sizeof(mac_data.entries)) { |
b1be4280 | 679 | goto error; |
921ac5d0 MT |
680 | } |
681 | ||
682 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 683 | |
921ac5d0 | 684 | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { |
b1be4280 | 685 | goto error; |
921ac5d0 | 686 | } |
b6503ed9 | 687 | |
edc24385 | 688 | if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { |
cae2e556 | 689 | s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], |
921ac5d0 MT |
690 | mac_data.entries * ETH_ALEN); |
691 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 692 | goto error; |
8fd2a2f1 | 693 | } |
cae2e556 | 694 | in_use += mac_data.entries; |
921ac5d0 | 695 | } else { |
cae2e556 | 696 | multi_overflow = 1; |
b6503ed9 AL |
697 | } |
698 | ||
cae2e556 AK |
699 | n->mac_table.in_use = in_use; |
700 | n->mac_table.first_multi = first_multi; | |
701 | n->mac_table.uni_overflow = uni_overflow; | |
702 | n->mac_table.multi_overflow = multi_overflow; | |
703 | memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); | |
704 | g_free(macs); | |
b1be4280 AK |
705 | rxfilter_notify(nc); |
706 | ||
b6503ed9 | 707 | return VIRTIO_NET_OK; |
b1be4280 AK |
708 | |
709 | error: | |
cae2e556 | 710 | g_free(macs); |
b1be4280 | 711 | return VIRTIO_NET_ERR; |
b6503ed9 AL |
712 | } |
713 | ||
f21c0ed9 | 714 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 715 | struct iovec *iov, unsigned int iov_cnt) |
f21c0ed9 | 716 | { |
1399c60d | 717 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f21c0ed9 | 718 | uint16_t vid; |
921ac5d0 | 719 | size_t s; |
b1be4280 | 720 | NetClientState *nc = qemu_get_queue(n->nic); |
f21c0ed9 | 721 | |
921ac5d0 | 722 | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
1399c60d | 723 | vid = virtio_lduw_p(vdev, &vid); |
921ac5d0 | 724 | if (s != sizeof(vid)) { |
f21c0ed9 AL |
725 | return VIRTIO_NET_ERR; |
726 | } | |
727 | ||
f21c0ed9 AL |
728 | if (vid >= MAX_VLAN) |
729 | return VIRTIO_NET_ERR; | |
730 | ||
731 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
732 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
733 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
734 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
735 | else | |
736 | return VIRTIO_NET_ERR; | |
737 | ||
b1be4280 AK |
738 | rxfilter_notify(nc); |
739 | ||
f21c0ed9 AL |
740 | return VIRTIO_NET_OK; |
741 | } | |
742 | ||
f57fcf70 JW |
743 | static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, |
744 | struct iovec *iov, unsigned int iov_cnt) | |
745 | { | |
746 | if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && | |
747 | n->status & VIRTIO_NET_S_ANNOUNCE) { | |
748 | n->status &= ~VIRTIO_NET_S_ANNOUNCE; | |
749 | if (n->announce_counter) { | |
750 | timer_mod(n->announce_timer, | |
751 | qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + | |
752 | self_announce_delay(n->announce_counter)); | |
753 | } | |
754 | return VIRTIO_NET_OK; | |
755 | } else { | |
756 | return VIRTIO_NET_ERR; | |
757 | } | |
758 | } | |
759 | ||
fed699f9 | 760 | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
f8f7c533 | 761 | struct iovec *iov, unsigned int iov_cnt) |
fed699f9 | 762 | { |
17a0ca55 | 763 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f8f7c533 JW |
764 | struct virtio_net_ctrl_mq mq; |
765 | size_t s; | |
766 | uint16_t queues; | |
fed699f9 | 767 | |
f8f7c533 JW |
768 | s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); |
769 | if (s != sizeof(mq)) { | |
fed699f9 JW |
770 | return VIRTIO_NET_ERR; |
771 | } | |
772 | ||
773 | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { | |
774 | return VIRTIO_NET_ERR; | |
775 | } | |
776 | ||
1399c60d | 777 | queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); |
fed699f9 | 778 | |
f8f7c533 JW |
779 | if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || |
780 | queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
781 | queues > n->max_queues || | |
fed699f9 JW |
782 | !n->multiqueue) { |
783 | return VIRTIO_NET_ERR; | |
784 | } | |
785 | ||
f8f7c533 | 786 | n->curr_queues = queues; |
fed699f9 JW |
787 | /* stop the backend before changing the number of queues to avoid handling a |
788 | * disabled queue */ | |
17a0ca55 | 789 | virtio_net_set_status(vdev, vdev->status); |
fed699f9 JW |
790 | virtio_net_set_queues(n); |
791 | ||
792 | return VIRTIO_NET_OK; | |
793 | } | |
3d11d36c AL |
794 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
795 | { | |
17a0ca55 | 796 | VirtIONet *n = VIRTIO_NET(vdev); |
3d11d36c AL |
797 | struct virtio_net_ctrl_hdr ctrl; |
798 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
799 | VirtQueueElement elem; | |
921ac5d0 MT |
800 | size_t s; |
801 | struct iovec *iov; | |
802 | unsigned int iov_cnt; | |
3d11d36c AL |
803 | |
804 | while (virtqueue_pop(vq, &elem)) { | |
921ac5d0 MT |
805 | if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || |
806 | iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { | |
e7b43f7e | 807 | error_report("virtio-net ctrl missing headers"); |
3d11d36c AL |
808 | exit(1); |
809 | } | |
810 | ||
921ac5d0 MT |
811 | iov = elem.out_sg; |
812 | iov_cnt = elem.out_num; | |
813 | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); | |
814 | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); | |
815 | if (s != sizeof(ctrl)) { | |
816 | status = VIRTIO_NET_ERR; | |
dd23454b | 817 | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
921ac5d0 MT |
818 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
819 | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { | |
820 | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); | |
821 | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { | |
822 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); | |
f57fcf70 JW |
823 | } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { |
824 | status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); | |
fed699f9 | 825 | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
f8f7c533 | 826 | status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); |
644c9858 DF |
827 | } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { |
828 | status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); | |
3d11d36c AL |
829 | } |
830 | ||
921ac5d0 MT |
831 | s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); |
832 | assert(s == sizeof(status)); | |
3d11d36c AL |
833 | |
834 | virtqueue_push(vq, &elem, sizeof(status)); | |
835 | virtio_notify(vdev, vq); | |
836 | } | |
837 | } | |
838 | ||
fbe78f4f AL |
839 | /* RX */ |
840 | ||
841 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
842 | { | |
17a0ca55 | 843 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 844 | int queue_index = vq2q(virtio_get_queue_index(vq)); |
8aeff62d | 845 | |
fed699f9 | 846 | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
fbe78f4f AL |
847 | } |
848 | ||
4e68f7a0 | 849 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 850 | { |
cc1f0f45 | 851 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 852 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fed699f9 | 853 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
0c87e93e | 854 | |
17a0ca55 | 855 | if (!vdev->vm_running) { |
95477323 MT |
856 | return 0; |
857 | } | |
cdd5cc12 | 858 | |
fed699f9 JW |
859 | if (nc->queue_index >= n->curr_queues) { |
860 | return 0; | |
861 | } | |
862 | ||
0c87e93e | 863 | if (!virtio_queue_ready(q->rx_vq) || |
17a0ca55 | 864 | !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 865 | return 0; |
0c87e93e | 866 | } |
fbe78f4f | 867 | |
cdd5cc12 MM |
868 | return 1; |
869 | } | |
870 | ||
0c87e93e | 871 | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
cdd5cc12 | 872 | { |
0c87e93e JW |
873 | VirtIONet *n = q->n; |
874 | if (virtio_queue_empty(q->rx_vq) || | |
fbe78f4f | 875 | (n->mergeable_rx_bufs && |
0c87e93e JW |
876 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
877 | virtio_queue_set_notification(q->rx_vq, 1); | |
06b12970 TL |
878 | |
879 | /* To avoid a race condition where the guest has made some buffers | |
880 | * available after the above check but before notification was | |
881 | * enabled, check for available buffers again. | |
882 | */ | |
0c87e93e | 883 | if (virtio_queue_empty(q->rx_vq) || |
06b12970 | 884 | (n->mergeable_rx_bufs && |
0c87e93e | 885 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
06b12970 | 886 | return 0; |
0c87e93e | 887 | } |
fbe78f4f AL |
888 | } |
889 | ||
0c87e93e | 890 | virtio_queue_set_notification(q->rx_vq, 0); |
fbe78f4f AL |
891 | return 1; |
892 | } | |
893 | ||
1399c60d | 894 | static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) |
032a74a1 | 895 | { |
1399c60d RR |
896 | virtio_tswap16s(vdev, &hdr->hdr_len); |
897 | virtio_tswap16s(vdev, &hdr->gso_size); | |
898 | virtio_tswap16s(vdev, &hdr->csum_start); | |
899 | virtio_tswap16s(vdev, &hdr->csum_offset); | |
032a74a1 CLG |
900 | } |
901 | ||
1d41b0c1 AL |
902 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
903 | * it never finds out that the packets don't have valid checksums. This | |
904 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
905 | * fix this with Xen but it hasn't appeared in an upstream release of | |
906 | * dhclient yet. | |
907 | * | |
908 | * To avoid breaking existing guests, we catch udp packets and add | |
909 | * checksums. This is terrible but it's better than hacking the guest | |
910 | * kernels. | |
911 | * | |
912 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
913 | * we should provide a mechanism to disable it to avoid polluting the host | |
914 | * cache. | |
915 | */ | |
916 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 917 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
918 | { |
919 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
920 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
921 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
922 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
923 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 924 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
925 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
926 | } | |
927 | } | |
928 | ||
280598b7 MT |
929 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
930 | const void *buf, size_t size) | |
fbe78f4f | 931 | { |
3a330134 | 932 | if (n->has_vnet_hdr) { |
22cc84db MT |
933 | /* FIXME this cast is evil */ |
934 | void *wbuf = (void *)buf; | |
280598b7 MT |
935 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
936 | size - n->host_hdr_len); | |
1399c60d | 937 | virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); |
280598b7 | 938 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); |
22cc84db MT |
939 | } else { |
940 | struct virtio_net_hdr hdr = { | |
941 | .flags = 0, | |
942 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
943 | }; | |
944 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 945 | } |
fbe78f4f AL |
946 | } |
947 | ||
3831ab20 AL |
948 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
949 | { | |
950 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 951 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 952 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 953 | int i; |
3831ab20 AL |
954 | |
955 | if (n->promisc) | |
956 | return 1; | |
957 | ||
e043ebc6 | 958 | ptr += n->host_hdr_len; |
3a330134 | 959 | |
f21c0ed9 AL |
960 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
961 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
962 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
963 | return 0; | |
964 | } | |
965 | ||
bbe2f399 AW |
966 | if (ptr[0] & 1) { // multicast |
967 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
968 | return !n->nobcast; |
969 | } else if (n->nomulti) { | |
970 | return 0; | |
8fd2a2f1 | 971 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
972 | return 1; |
973 | } | |
2d9aba39 AW |
974 | |
975 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
976 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
977 | return 1; | |
978 | } | |
979 | } | |
bbe2f399 | 980 | } else { // unicast |
015cb166 AW |
981 | if (n->nouni) { |
982 | return 0; | |
983 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
984 | return 1; |
985 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
986 | return 1; |
987 | } | |
3831ab20 | 988 | |
2d9aba39 AW |
989 | for (i = 0; i < n->mac_table.first_multi; i++) { |
990 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
991 | return 1; | |
992 | } | |
993 | } | |
b6503ed9 AL |
994 | } |
995 | ||
3831ab20 AL |
996 | return 0; |
997 | } | |
998 | ||
4e68f7a0 | 999 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 1000 | { |
cc1f0f45 | 1001 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1002 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1003 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
63c58728 MT |
1004 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
1005 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
1006 | unsigned mhdr_cnt = 0; | |
22cc84db | 1007 | size_t offset, i, guest_offset; |
fbe78f4f | 1008 | |
fed699f9 | 1009 | if (!virtio_net_can_receive(nc)) { |
cdd5cc12 | 1010 | return -1; |
b356f76d | 1011 | } |
cdd5cc12 | 1012 | |
940cda94 | 1013 | /* hdr_len refers to the header we supply to the guest */ |
0c87e93e | 1014 | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { |
8aeff62d | 1015 | return 0; |
0c87e93e | 1016 | } |
fbe78f4f | 1017 | |
3831ab20 | 1018 | if (!receive_filter(n, buf, size)) |
4f1c942b | 1019 | return size; |
3831ab20 | 1020 | |
fbe78f4f AL |
1021 | offset = i = 0; |
1022 | ||
1023 | while (offset < size) { | |
1024 | VirtQueueElement elem; | |
1025 | int len, total; | |
22cc84db | 1026 | const struct iovec *sg = elem.in_sg; |
fbe78f4f | 1027 | |
22c253d9 | 1028 | total = 0; |
fbe78f4f | 1029 | |
0c87e93e | 1030 | if (virtqueue_pop(q->rx_vq, &elem) == 0) { |
fbe78f4f | 1031 | if (i == 0) |
4f1c942b | 1032 | return -1; |
e7b43f7e | 1033 | error_report("virtio-net unexpected empty queue: " |
279a4253 | 1034 | "i %zd mergeable %d offset %zd, size %zd, " |
e7b43f7e | 1035 | "guest hdr len %zd, host hdr len %zd guest features 0x%x", |
279a4253 | 1036 | i, n->mergeable_rx_bufs, offset, size, |
17a0ca55 | 1037 | n->guest_hdr_len, n->host_hdr_len, vdev->guest_features); |
fbe78f4f AL |
1038 | exit(1); |
1039 | } | |
1040 | ||
1041 | if (elem.in_num < 1) { | |
e7b43f7e | 1042 | error_report("virtio-net receive queue contains no in buffers"); |
fbe78f4f AL |
1043 | exit(1); |
1044 | } | |
1045 | ||
fbe78f4f | 1046 | if (i == 0) { |
c8d28e7e | 1047 | assert(offset == 0); |
63c58728 MT |
1048 | if (n->mergeable_rx_bufs) { |
1049 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
1050 | sg, elem.in_num, | |
1051 | offsetof(typeof(mhdr), num_buffers), | |
1052 | sizeof(mhdr.num_buffers)); | |
1053 | } | |
fbe78f4f | 1054 | |
c8d28e7e MT |
1055 | receive_header(n, sg, elem.in_num, buf, size); |
1056 | offset = n->host_hdr_len; | |
e35e23f6 | 1057 | total += n->guest_hdr_len; |
22cc84db MT |
1058 | guest_offset = n->guest_hdr_len; |
1059 | } else { | |
1060 | guest_offset = 0; | |
fbe78f4f AL |
1061 | } |
1062 | ||
1063 | /* copy in packet. ugh */ | |
22cc84db | 1064 | len = iov_from_buf(sg, elem.in_num, guest_offset, |
dcf6f5e1 | 1065 | buf + offset, size - offset); |
fbe78f4f | 1066 | total += len; |
279a4253 MT |
1067 | offset += len; |
1068 | /* If buffers can't be merged, at this point we | |
1069 | * must have consumed the complete packet. | |
1070 | * Otherwise, drop it. */ | |
1071 | if (!n->mergeable_rx_bufs && offset < size) { | |
1072 | #if 0 | |
e7b43f7e SH |
1073 | error_report("virtio-net truncated non-mergeable packet: " |
1074 | "i %zd mergeable %d offset %zd, size %zd, " | |
1075 | "guest hdr len %zd, host hdr len %zd", | |
1076 | i, n->mergeable_rx_bufs, | |
e35e23f6 | 1077 | offset, size, n->guest_hdr_len, n->host_hdr_len); |
279a4253 MT |
1078 | #endif |
1079 | return size; | |
1080 | } | |
fbe78f4f AL |
1081 | |
1082 | /* signal other side */ | |
0c87e93e | 1083 | virtqueue_fill(q->rx_vq, &elem, total, i++); |
fbe78f4f AL |
1084 | } |
1085 | ||
63c58728 | 1086 | if (mhdr_cnt) { |
1399c60d | 1087 | virtio_stw_p(vdev, &mhdr.num_buffers, i); |
63c58728 MT |
1088 | iov_from_buf(mhdr_sg, mhdr_cnt, |
1089 | 0, | |
1090 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 1091 | } |
fbe78f4f | 1092 | |
0c87e93e | 1093 | virtqueue_flush(q->rx_vq, i); |
17a0ca55 | 1094 | virtio_notify(vdev, q->rx_vq); |
4f1c942b MM |
1095 | |
1096 | return size; | |
fbe78f4f AL |
1097 | } |
1098 | ||
0c87e93e | 1099 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q); |
6243375f | 1100 | |
4e68f7a0 | 1101 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 1102 | { |
cc1f0f45 | 1103 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1104 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1105 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
6243375f | 1106 | |
0c87e93e | 1107 | virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); |
17a0ca55 | 1108 | virtio_notify(vdev, q->tx_vq); |
6243375f | 1109 | |
0c87e93e | 1110 | q->async_tx.elem.out_num = q->async_tx.len = 0; |
6243375f | 1111 | |
0c87e93e JW |
1112 | virtio_queue_set_notification(q->tx_vq, 1); |
1113 | virtio_net_flush_tx(q); | |
6243375f MM |
1114 | } |
1115 | ||
fbe78f4f | 1116 | /* TX */ |
0c87e93e | 1117 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q) |
fbe78f4f | 1118 | { |
0c87e93e | 1119 | VirtIONet *n = q->n; |
17a0ca55 | 1120 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fbe78f4f | 1121 | VirtQueueElement elem; |
e3f30488 | 1122 | int32_t num_packets = 0; |
fed699f9 | 1123 | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); |
17a0ca55 | 1124 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
e3f30488 AW |
1125 | return num_packets; |
1126 | } | |
fbe78f4f | 1127 | |
0c87e93e JW |
1128 | if (q->async_tx.elem.out_num) { |
1129 | virtio_queue_set_notification(q->tx_vq, 0); | |
e3f30488 | 1130 | return num_packets; |
6243375f MM |
1131 | } |
1132 | ||
0c87e93e | 1133 | while (virtqueue_pop(q->tx_vq, &elem)) { |
14761f9c | 1134 | ssize_t ret, len; |
fbe78f4f AL |
1135 | unsigned int out_num = elem.out_num; |
1136 | struct iovec *out_sg = &elem.out_sg[0]; | |
14761f9c | 1137 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; |
fbe78f4f | 1138 | |
7b80d08e | 1139 | if (out_num < 1) { |
e7b43f7e | 1140 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
1141 | exit(1); |
1142 | } | |
1143 | ||
032a74a1 CLG |
1144 | if (n->has_vnet_hdr) { |
1145 | if (out_sg[0].iov_len < n->guest_hdr_len) { | |
1146 | error_report("virtio-net header incorrect"); | |
1147 | exit(1); | |
1148 | } | |
1399c60d | 1149 | virtio_net_hdr_swap(vdev, (void *) out_sg[0].iov_base); |
032a74a1 CLG |
1150 | } |
1151 | ||
14761f9c MT |
1152 | /* |
1153 | * If host wants to see the guest header as is, we can | |
1154 | * pass it on unchanged. Otherwise, copy just the parts | |
1155 | * that host is interested in. | |
1156 | */ | |
1157 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
1158 | if (n->host_hdr_len != n->guest_hdr_len) { | |
1159 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
1160 | out_sg, out_num, | |
1161 | 0, n->host_hdr_len); | |
1162 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
1163 | out_sg, out_num, | |
1164 | n->guest_hdr_len, -1); | |
1165 | out_num = sg_num; | |
1166 | out_sg = sg; | |
fbe78f4f AL |
1167 | } |
1168 | ||
7b80d08e | 1169 | len = n->guest_hdr_len; |
14761f9c | 1170 | |
fed699f9 JW |
1171 | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
1172 | out_sg, out_num, virtio_net_tx_complete); | |
6243375f | 1173 | if (ret == 0) { |
0c87e93e JW |
1174 | virtio_queue_set_notification(q->tx_vq, 0); |
1175 | q->async_tx.elem = elem; | |
1176 | q->async_tx.len = len; | |
e3f30488 | 1177 | return -EBUSY; |
6243375f MM |
1178 | } |
1179 | ||
1180 | len += ret; | |
fbe78f4f | 1181 | |
0c87e93e | 1182 | virtqueue_push(q->tx_vq, &elem, 0); |
17a0ca55 | 1183 | virtio_notify(vdev, q->tx_vq); |
e3f30488 AW |
1184 | |
1185 | if (++num_packets >= n->tx_burst) { | |
1186 | break; | |
1187 | } | |
fbe78f4f | 1188 | } |
e3f30488 | 1189 | return num_packets; |
fbe78f4f AL |
1190 | } |
1191 | ||
a697a334 | 1192 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f | 1193 | { |
17a0ca55 | 1194 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1195 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
fbe78f4f | 1196 | |
783e7706 | 1197 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 1198 | if (!vdev->vm_running) { |
0c87e93e | 1199 | q->tx_waiting = 1; |
783e7706 MT |
1200 | return; |
1201 | } | |
1202 | ||
0c87e93e | 1203 | if (q->tx_waiting) { |
fbe78f4f | 1204 | virtio_queue_set_notification(vq, 1); |
bc72ad67 | 1205 | timer_del(q->tx_timer); |
0c87e93e JW |
1206 | q->tx_waiting = 0; |
1207 | virtio_net_flush_tx(q); | |
fbe78f4f | 1208 | } else { |
bc72ad67 AB |
1209 | timer_mod(q->tx_timer, |
1210 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
0c87e93e | 1211 | q->tx_waiting = 1; |
fbe78f4f AL |
1212 | virtio_queue_set_notification(vq, 0); |
1213 | } | |
1214 | } | |
1215 | ||
a697a334 AW |
1216 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
1217 | { | |
17a0ca55 | 1218 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1219 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
a697a334 | 1220 | |
0c87e93e | 1221 | if (unlikely(q->tx_waiting)) { |
a697a334 AW |
1222 | return; |
1223 | } | |
0c87e93e | 1224 | q->tx_waiting = 1; |
783e7706 | 1225 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 1226 | if (!vdev->vm_running) { |
783e7706 MT |
1227 | return; |
1228 | } | |
a697a334 | 1229 | virtio_queue_set_notification(vq, 0); |
0c87e93e | 1230 | qemu_bh_schedule(q->tx_bh); |
a697a334 AW |
1231 | } |
1232 | ||
fbe78f4f AL |
1233 | static void virtio_net_tx_timer(void *opaque) |
1234 | { | |
0c87e93e JW |
1235 | VirtIONetQueue *q = opaque; |
1236 | VirtIONet *n = q->n; | |
17a0ca55 | 1237 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
e8bcf842 MT |
1238 | /* This happens when device was stopped but BH wasn't. */ |
1239 | if (!vdev->vm_running) { | |
1240 | /* Make sure tx waiting is set, so we'll run when restarted. */ | |
1241 | assert(q->tx_waiting); | |
1242 | return; | |
1243 | } | |
fbe78f4f | 1244 | |
0c87e93e | 1245 | q->tx_waiting = 0; |
fbe78f4f AL |
1246 | |
1247 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 1248 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 1249 | return; |
17a0ca55 | 1250 | } |
fbe78f4f | 1251 | |
0c87e93e JW |
1252 | virtio_queue_set_notification(q->tx_vq, 1); |
1253 | virtio_net_flush_tx(q); | |
fbe78f4f AL |
1254 | } |
1255 | ||
a697a334 AW |
1256 | static void virtio_net_tx_bh(void *opaque) |
1257 | { | |
0c87e93e JW |
1258 | VirtIONetQueue *q = opaque; |
1259 | VirtIONet *n = q->n; | |
17a0ca55 | 1260 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
a697a334 AW |
1261 | int32_t ret; |
1262 | ||
e8bcf842 MT |
1263 | /* This happens when device was stopped but BH wasn't. */ |
1264 | if (!vdev->vm_running) { | |
1265 | /* Make sure tx waiting is set, so we'll run when restarted. */ | |
1266 | assert(q->tx_waiting); | |
1267 | return; | |
1268 | } | |
783e7706 | 1269 | |
0c87e93e | 1270 | q->tx_waiting = 0; |
a697a334 AW |
1271 | |
1272 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 1273 | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { |
a697a334 | 1274 | return; |
17a0ca55 | 1275 | } |
a697a334 | 1276 | |
0c87e93e | 1277 | ret = virtio_net_flush_tx(q); |
a697a334 AW |
1278 | if (ret == -EBUSY) { |
1279 | return; /* Notification re-enable handled by tx_complete */ | |
1280 | } | |
1281 | ||
1282 | /* If we flush a full burst of packets, assume there are | |
1283 | * more coming and immediately reschedule */ | |
1284 | if (ret >= n->tx_burst) { | |
0c87e93e JW |
1285 | qemu_bh_schedule(q->tx_bh); |
1286 | q->tx_waiting = 1; | |
a697a334 AW |
1287 | return; |
1288 | } | |
1289 | ||
1290 | /* If less than a full burst, re-enable notification and flush | |
1291 | * anything that may have come in while we weren't looking. If | |
1292 | * we find something, assume the guest is still active and reschedule */ | |
0c87e93e JW |
1293 | virtio_queue_set_notification(q->tx_vq, 1); |
1294 | if (virtio_net_flush_tx(q) > 0) { | |
1295 | virtio_queue_set_notification(q->tx_vq, 0); | |
1296 | qemu_bh_schedule(q->tx_bh); | |
1297 | q->tx_waiting = 1; | |
a697a334 AW |
1298 | } |
1299 | } | |
1300 | ||
ec57db16 | 1301 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) |
fed699f9 | 1302 | { |
17a0ca55 | 1303 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fed699f9 JW |
1304 | int i, max = multiqueue ? n->max_queues : 1; |
1305 | ||
1306 | n->multiqueue = multiqueue; | |
1307 | ||
1308 | for (i = 2; i <= n->max_queues * 2 + 1; i++) { | |
1309 | virtio_del_queue(vdev, i); | |
1310 | } | |
1311 | ||
1312 | for (i = 1; i < max; i++) { | |
1313 | n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); | |
1314 | if (n->vqs[i].tx_timer) { | |
1315 | n->vqs[i].tx_vq = | |
1316 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); | |
bc72ad67 | 1317 | n->vqs[i].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
fed699f9 JW |
1318 | virtio_net_tx_timer, |
1319 | &n->vqs[i]); | |
1320 | } else { | |
1321 | n->vqs[i].tx_vq = | |
1322 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); | |
1323 | n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); | |
1324 | } | |
1325 | ||
1326 | n->vqs[i].tx_waiting = 0; | |
1327 | n->vqs[i].n = n; | |
1328 | } | |
1329 | ||
ec57db16 JW |
1330 | /* Note: Minux Guests (version 3.2.1) use ctrl vq but don't ack |
1331 | * VIRTIO_NET_F_CTRL_VQ. Create ctrl vq unconditionally to avoid | |
1332 | * breaking them. | |
1333 | */ | |
1334 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); | |
fed699f9 JW |
1335 | |
1336 | virtio_net_set_queues(n); | |
1337 | } | |
1338 | ||
fbe78f4f AL |
1339 | static void virtio_net_save(QEMUFile *f, void *opaque) |
1340 | { | |
1341 | VirtIONet *n = opaque; | |
17a0ca55 | 1342 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fbe78f4f | 1343 | |
afbaa7b4 MT |
1344 | /* At this point, backend must be stopped, otherwise |
1345 | * it might keep writing to memory. */ | |
1346 | assert(!n->vhost_started); | |
17a0ca55 | 1347 | virtio_save(vdev, f); |
037dab2f GK |
1348 | } |
1349 | ||
1350 | static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) | |
1351 | { | |
1352 | VirtIONet *n = VIRTIO_NET(vdev); | |
1353 | int i; | |
fbe78f4f | 1354 | |
79674068 | 1355 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1356 | qemu_put_be32(f, n->vqs[0].tx_waiting); |
e46cb38f | 1357 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 1358 | qemu_put_be16(f, n->status); |
f10c592e AW |
1359 | qemu_put_byte(f, n->promisc); |
1360 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
1361 | qemu_put_be32(f, n->mac_table.in_use); |
1362 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 1363 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 1364 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
1365 | qemu_put_byte(f, n->mac_table.multi_overflow); |
1366 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
1367 | qemu_put_byte(f, n->alluni); |
1368 | qemu_put_byte(f, n->nomulti); | |
1369 | qemu_put_byte(f, n->nouni); | |
1370 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 1371 | qemu_put_byte(f, n->has_ufo); |
5f800801 JW |
1372 | if (n->max_queues > 1) { |
1373 | qemu_put_be16(f, n->max_queues); | |
1374 | qemu_put_be16(f, n->curr_queues); | |
1375 | for (i = 1; i < n->curr_queues; i++) { | |
1376 | qemu_put_be32(f, n->vqs[i].tx_waiting); | |
1377 | } | |
1378 | } | |
644c9858 DF |
1379 | |
1380 | if ((1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) & vdev->guest_features) { | |
1381 | qemu_put_be64(f, n->curr_guest_offloads); | |
1382 | } | |
fbe78f4f AL |
1383 | } |
1384 | ||
1385 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
1386 | { | |
1387 | VirtIONet *n = opaque; | |
17a0ca55 | 1388 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fbe78f4f | 1389 | |
9d6271b8 | 1390 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
1391 | return -EINVAL; |
1392 | ||
037dab2f GK |
1393 | return virtio_load(vdev, f, version_id); |
1394 | } | |
1395 | ||
1396 | static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, | |
1397 | int version_id) | |
1398 | { | |
1399 | VirtIONet *n = VIRTIO_NET(vdev); | |
1400 | int i, link_down; | |
fbe78f4f | 1401 | |
79674068 | 1402 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1403 | n->vqs[0].tx_waiting = qemu_get_be32(f); |
ff3a8066 MT |
1404 | |
1405 | virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f)); | |
fbe78f4f | 1406 | |
9d6271b8 AL |
1407 | if (version_id >= 3) |
1408 | n->status = qemu_get_be16(f); | |
1409 | ||
002437cd | 1410 | if (version_id >= 4) { |
f10c592e AW |
1411 | if (version_id < 8) { |
1412 | n->promisc = qemu_get_be32(f); | |
1413 | n->allmulti = qemu_get_be32(f); | |
1414 | } else { | |
1415 | n->promisc = qemu_get_byte(f); | |
1416 | n->allmulti = qemu_get_byte(f); | |
1417 | } | |
002437cd AL |
1418 | } |
1419 | ||
b6503ed9 AL |
1420 | if (version_id >= 5) { |
1421 | n->mac_table.in_use = qemu_get_be32(f); | |
1422 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
1423 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
1424 | qemu_get_buffer(f, n->mac_table.macs, | |
1425 | n->mac_table.in_use * ETH_ALEN); | |
98f93ddd MT |
1426 | } else { |
1427 | int64_t i; | |
1428 | ||
1429 | /* Overflow detected - can happen if source has a larger MAC table. | |
1430 | * We simply set overflow flag so there's no need to maintain the | |
1431 | * table of addresses, discard them all. | |
1432 | * Note: 64 bit math to avoid integer overflow. | |
1433 | */ | |
1434 | for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { | |
1435 | qemu_get_byte(f); | |
1436 | } | |
8fd2a2f1 | 1437 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
1438 | n->mac_table.in_use = 0; |
1439 | } | |
1440 | } | |
1441 | ||
f21c0ed9 AL |
1442 | if (version_id >= 6) |
1443 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
1444 | ||
3a330134 MM |
1445 | if (version_id >= 7) { |
1446 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 1447 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
1448 | return -1; |
1449 | } | |
6c042c16 AW |
1450 | } |
1451 | ||
8fd2a2f1 AW |
1452 | if (version_id >= 9) { |
1453 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
1454 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
1455 | } | |
1456 | ||
015cb166 AW |
1457 | if (version_id >= 10) { |
1458 | n->alluni = qemu_get_byte(f); | |
1459 | n->nomulti = qemu_get_byte(f); | |
1460 | n->nouni = qemu_get_byte(f); | |
1461 | n->nobcast = qemu_get_byte(f); | |
1462 | } | |
1463 | ||
0ce0e8f4 MM |
1464 | if (version_id >= 11) { |
1465 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 1466 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
1467 | return -1; |
1468 | } | |
1469 | } | |
1470 | ||
5f800801 JW |
1471 | if (n->max_queues > 1) { |
1472 | if (n->max_queues != qemu_get_be16(f)) { | |
1473 | error_report("virtio-net: different max_queues "); | |
1474 | return -1; | |
1475 | } | |
1476 | ||
1477 | n->curr_queues = qemu_get_be16(f); | |
eea750a5 MT |
1478 | if (n->curr_queues > n->max_queues) { |
1479 | error_report("virtio-net: curr_queues %x > max_queues %x", | |
1480 | n->curr_queues, n->max_queues); | |
1481 | return -1; | |
1482 | } | |
5f800801 JW |
1483 | for (i = 1; i < n->curr_queues; i++) { |
1484 | n->vqs[i].tx_waiting = qemu_get_be32(f); | |
1485 | } | |
1486 | } | |
1487 | ||
644c9858 DF |
1488 | if ((1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) & vdev->guest_features) { |
1489 | n->curr_guest_offloads = qemu_get_be64(f); | |
1490 | } else { | |
1491 | n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); | |
1492 | } | |
1493 | ||
1494 | if (peer_has_vnet_hdr(n)) { | |
1495 | virtio_net_apply_guest_offloads(n); | |
1496 | } | |
1497 | ||
5f800801 JW |
1498 | virtio_net_set_queues(n); |
1499 | ||
2d9aba39 AW |
1500 | /* Find the first multicast entry in the saved MAC filter */ |
1501 | for (i = 0; i < n->mac_table.in_use; i++) { | |
1502 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
1503 | break; | |
1504 | } | |
1505 | } | |
1506 | n->mac_table.first_multi = i; | |
98991481 AK |
1507 | |
1508 | /* nc.link_down can't be migrated, so infer link_down according | |
1509 | * to link status bit in n->status */ | |
5f800801 JW |
1510 | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; |
1511 | for (i = 0; i < n->max_queues; i++) { | |
1512 | qemu_get_subqueue(n->nic, i)->link_down = link_down; | |
1513 | } | |
98991481 | 1514 | |
f57fcf70 JW |
1515 | if (vdev->guest_features & (0x1 << VIRTIO_NET_F_GUEST_ANNOUNCE) && |
1516 | vdev->guest_features & (0x1 << VIRTIO_NET_F_CTRL_VQ)) { | |
1517 | n->announce_counter = SELF_ANNOUNCE_ROUNDS; | |
1518 | timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); | |
1519 | } | |
1520 | ||
fbe78f4f AL |
1521 | return 0; |
1522 | } | |
1523 | ||
4e68f7a0 | 1524 | static void virtio_net_cleanup(NetClientState *nc) |
b946a153 | 1525 | { |
cc1f0f45 | 1526 | VirtIONet *n = qemu_get_nic_opaque(nc); |
b946a153 | 1527 | |
eb6b6c12 | 1528 | n->nic = NULL; |
b946a153 AL |
1529 | } |
1530 | ||
eb6b6c12 | 1531 | static NetClientInfo net_virtio_info = { |
2be64a68 | 1532 | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
eb6b6c12 MM |
1533 | .size = sizeof(NICState), |
1534 | .can_receive = virtio_net_can_receive, | |
1535 | .receive = virtio_net_receive, | |
cb77e358 | 1536 | .cleanup = virtio_net_cleanup, |
eb6b6c12 | 1537 | .link_status_changed = virtio_net_set_link_status, |
b1be4280 | 1538 | .query_rx_filter = virtio_net_query_rxfilter, |
eb6b6c12 MM |
1539 | }; |
1540 | ||
f56a1247 MT |
1541 | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
1542 | { | |
17a0ca55 | 1543 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1544 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1545 | assert(n->vhost_started); |
ed8b4afe | 1546 | return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); |
f56a1247 MT |
1547 | } |
1548 | ||
1549 | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, | |
1550 | bool mask) | |
1551 | { | |
17a0ca55 | 1552 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1553 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1554 | assert(n->vhost_started); |
ed8b4afe | 1555 | vhost_net_virtqueue_mask(get_vhost_net(nc->peer), |
f56a1247 MT |
1556 | vdev, idx, mask); |
1557 | } | |
1558 | ||
17ec5a86 | 1559 | void virtio_net_set_config_size(VirtIONet *n, uint32_t host_features) |
fbe78f4f | 1560 | { |
14f9b664 | 1561 | int i, config_size = 0; |
e9016ee2 | 1562 | host_features |= (1 << VIRTIO_NET_F_MAC); |
14f9b664 JL |
1563 | for (i = 0; feature_sizes[i].flags != 0; i++) { |
1564 | if (host_features & feature_sizes[i].flags) { | |
1565 | config_size = MAX(feature_sizes[i].end, config_size); | |
1566 | } | |
1567 | } | |
17ec5a86 FK |
1568 | n->config_size = config_size; |
1569 | } | |
1570 | ||
8a253ec2 FK |
1571 | void virtio_net_set_netclient_name(VirtIONet *n, const char *name, |
1572 | const char *type) | |
1573 | { | |
1574 | /* | |
1575 | * The name can be NULL, the netclient name will be type.x. | |
1576 | */ | |
1577 | assert(type != NULL); | |
1578 | ||
9e288406 | 1579 | g_free(n->netclient_name); |
9e288406 | 1580 | g_free(n->netclient_type); |
80e0090a | 1581 | n->netclient_name = g_strdup(name); |
8a253ec2 FK |
1582 | n->netclient_type = g_strdup(type); |
1583 | } | |
1584 | ||
e6f746b3 | 1585 | static void virtio_net_device_realize(DeviceState *dev, Error **errp) |
17ec5a86 | 1586 | { |
e6f746b3 | 1587 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
284a32f0 | 1588 | VirtIONet *n = VIRTIO_NET(dev); |
b1be4280 | 1589 | NetClientState *nc; |
284a32f0 | 1590 | int i; |
1773d9ee | 1591 | |
284a32f0 | 1592 | virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); |
fbe78f4f | 1593 | |
575a1c0e | 1594 | n->max_queues = MAX(n->nic_conf.peers.queues, 1); |
f6b26cf2 | 1595 | n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); |
17a0ca55 | 1596 | n->vqs[0].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); |
fed699f9 JW |
1597 | n->curr_queues = 1; |
1598 | n->vqs[0].n = n; | |
1773d9ee | 1599 | n->tx_timeout = n->net_conf.txtimer; |
a697a334 | 1600 | |
1773d9ee FK |
1601 | if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") |
1602 | && strcmp(n->net_conf.tx, "bh")) { | |
e7b43f7e SH |
1603 | error_report("virtio-net: " |
1604 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
1773d9ee | 1605 | n->net_conf.tx); |
e7b43f7e | 1606 | error_report("Defaulting to \"bh\""); |
a697a334 AW |
1607 | } |
1608 | ||
1773d9ee | 1609 | if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { |
17a0ca55 | 1610 | n->vqs[0].tx_vq = virtio_add_queue(vdev, 256, |
fed699f9 | 1611 | virtio_net_handle_tx_timer); |
bc72ad67 | 1612 | n->vqs[0].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, virtio_net_tx_timer, |
fed699f9 | 1613 | &n->vqs[0]); |
a697a334 | 1614 | } else { |
17a0ca55 | 1615 | n->vqs[0].tx_vq = virtio_add_queue(vdev, 256, |
fed699f9 JW |
1616 | virtio_net_handle_tx_bh); |
1617 | n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); | |
a697a334 | 1618 | } |
17a0ca55 | 1619 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); |
1773d9ee FK |
1620 | qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); |
1621 | memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); | |
554c97dd | 1622 | n->status = VIRTIO_NET_S_LINK_UP; |
f57fcf70 JW |
1623 | n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, |
1624 | virtio_net_announce_timer, n); | |
fbe78f4f | 1625 | |
8a253ec2 FK |
1626 | if (n->netclient_type) { |
1627 | /* | |
1628 | * Happen when virtio_net_set_netclient_name has been called. | |
1629 | */ | |
1630 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
1631 | n->netclient_type, n->netclient_name, n); | |
1632 | } else { | |
1633 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
284a32f0 | 1634 | object_get_typename(OBJECT(dev)), dev->id, n); |
8a253ec2 FK |
1635 | } |
1636 | ||
6e371ab8 MT |
1637 | peer_test_vnet_hdr(n); |
1638 | if (peer_has_vnet_hdr(n)) { | |
fed699f9 | 1639 | for (i = 0; i < n->max_queues; i++) { |
d6085e3a | 1640 | qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); |
fed699f9 | 1641 | } |
6e371ab8 MT |
1642 | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
1643 | } else { | |
1644 | n->host_hdr_len = 0; | |
1645 | } | |
eb6b6c12 | 1646 | |
1773d9ee | 1647 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); |
96d5e201 | 1648 | |
fed699f9 | 1649 | n->vqs[0].tx_waiting = 0; |
1773d9ee | 1650 | n->tx_burst = n->net_conf.txburst; |
ff3a8066 | 1651 | virtio_net_set_mrg_rx_bufs(n, 0); |
002437cd | 1652 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 1653 | |
7267c094 | 1654 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 1655 | |
7267c094 | 1656 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 1657 | |
b1be4280 AK |
1658 | nc = qemu_get_queue(n->nic); |
1659 | nc->rxfilter_notify_enabled = 1; | |
1660 | ||
284a32f0 AF |
1661 | n->qdev = dev; |
1662 | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, | |
fbe78f4f | 1663 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 1664 | |
284a32f0 | 1665 | add_boot_device_path(n->nic_conf.bootindex, dev, "/ethernet-phy@0"); |
17ec5a86 FK |
1666 | } |
1667 | ||
306ec6c3 | 1668 | static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) |
17ec5a86 | 1669 | { |
306ec6c3 AF |
1670 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
1671 | VirtIONet *n = VIRTIO_NET(dev); | |
17ec5a86 FK |
1672 | int i; |
1673 | ||
1674 | /* This will stop vhost backend if appropriate. */ | |
1675 | virtio_net_set_status(vdev, 0); | |
1676 | ||
306ec6c3 | 1677 | unregister_savevm(dev, "virtio-net", n); |
17ec5a86 | 1678 | |
9e288406 MA |
1679 | g_free(n->netclient_name); |
1680 | n->netclient_name = NULL; | |
1681 | g_free(n->netclient_type); | |
1682 | n->netclient_type = NULL; | |
8a253ec2 | 1683 | |
17ec5a86 FK |
1684 | g_free(n->mac_table.macs); |
1685 | g_free(n->vlans); | |
1686 | ||
1687 | for (i = 0; i < n->max_queues; i++) { | |
1688 | VirtIONetQueue *q = &n->vqs[i]; | |
1689 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
1690 | ||
1691 | qemu_purge_queued_packets(nc); | |
1692 | ||
1693 | if (q->tx_timer) { | |
bc72ad67 AB |
1694 | timer_del(q->tx_timer); |
1695 | timer_free(q->tx_timer); | |
fe2dafa0 | 1696 | } else if (q->tx_bh) { |
17ec5a86 FK |
1697 | qemu_bh_delete(q->tx_bh); |
1698 | } | |
1699 | } | |
1700 | ||
f57fcf70 JW |
1701 | timer_del(n->announce_timer); |
1702 | timer_free(n->announce_timer); | |
17ec5a86 FK |
1703 | g_free(n->vqs); |
1704 | qemu_del_nic(n->nic); | |
6a1a8cc7 | 1705 | virtio_cleanup(vdev); |
17ec5a86 FK |
1706 | } |
1707 | ||
1708 | static void virtio_net_instance_init(Object *obj) | |
1709 | { | |
1710 | VirtIONet *n = VIRTIO_NET(obj); | |
1711 | ||
1712 | /* | |
1713 | * The default config_size is sizeof(struct virtio_net_config). | |
1714 | * Can be overriden with virtio_net_set_config_size. | |
1715 | */ | |
1716 | n->config_size = sizeof(struct virtio_net_config); | |
1717 | } | |
1718 | ||
1719 | static Property virtio_net_properties[] = { | |
1720 | DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), | |
1721 | DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, | |
1722 | TX_TIMER_INTERVAL), | |
1723 | DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), | |
1724 | DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), | |
1725 | DEFINE_PROP_END_OF_LIST(), | |
1726 | }; | |
1727 | ||
1728 | static void virtio_net_class_init(ObjectClass *klass, void *data) | |
1729 | { | |
1730 | DeviceClass *dc = DEVICE_CLASS(klass); | |
1731 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
e6f746b3 | 1732 | |
17ec5a86 | 1733 | dc->props = virtio_net_properties; |
125ee0ed | 1734 | set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
e6f746b3 | 1735 | vdc->realize = virtio_net_device_realize; |
306ec6c3 | 1736 | vdc->unrealize = virtio_net_device_unrealize; |
17ec5a86 FK |
1737 | vdc->get_config = virtio_net_get_config; |
1738 | vdc->set_config = virtio_net_set_config; | |
1739 | vdc->get_features = virtio_net_get_features; | |
1740 | vdc->set_features = virtio_net_set_features; | |
1741 | vdc->bad_features = virtio_net_bad_features; | |
1742 | vdc->reset = virtio_net_reset; | |
1743 | vdc->set_status = virtio_net_set_status; | |
1744 | vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; | |
1745 | vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; | |
037dab2f GK |
1746 | vdc->load = virtio_net_load_device; |
1747 | vdc->save = virtio_net_save_device; | |
17ec5a86 FK |
1748 | } |
1749 | ||
1750 | static const TypeInfo virtio_net_info = { | |
1751 | .name = TYPE_VIRTIO_NET, | |
1752 | .parent = TYPE_VIRTIO_DEVICE, | |
1753 | .instance_size = sizeof(VirtIONet), | |
1754 | .instance_init = virtio_net_instance_init, | |
1755 | .class_init = virtio_net_class_init, | |
1756 | }; | |
1757 | ||
1758 | static void virtio_register_types(void) | |
1759 | { | |
1760 | type_register_static(&virtio_net_info); | |
1761 | } | |
1762 | ||
1763 | type_init(virtio_register_types) |