]>
Commit | Line | Data |
---|---|---|
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 AK |
24 | #include "qapi/qmp/qjson.h" |
25 | #include "monitor/monitor.h" | |
fbe78f4f | 26 | |
0ce0e8f4 | 27 | #define VIRTIO_NET_VM_VERSION 11 |
b6503ed9 | 28 | |
4ffb17f5 | 29 | #define MAC_TABLE_ENTRIES 64 |
f21c0ed9 | 30 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 31 | |
14f9b664 JL |
32 | /* |
33 | * Calculate the number of bytes up to and including the given 'field' of | |
34 | * 'container'. | |
35 | */ | |
36 | #define endof(container, field) \ | |
37 | (offsetof(container, field) + sizeof(((container *)0)->field)) | |
38 | ||
39 | typedef struct VirtIOFeature { | |
40 | uint32_t flags; | |
41 | size_t end; | |
42 | } VirtIOFeature; | |
43 | ||
44 | static VirtIOFeature feature_sizes[] = { | |
45 | {.flags = 1 << VIRTIO_NET_F_MAC, | |
46 | .end = endof(struct virtio_net_config, mac)}, | |
47 | {.flags = 1 << VIRTIO_NET_F_STATUS, | |
48 | .end = endof(struct virtio_net_config, status)}, | |
49 | {.flags = 1 << VIRTIO_NET_F_MQ, | |
50 | .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, | |
51 | {} | |
52 | }; | |
53 | ||
fed699f9 | 54 | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) |
0c87e93e JW |
55 | { |
56 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
57 | ||
fed699f9 | 58 | return &n->vqs[nc->queue_index]; |
0c87e93e | 59 | } |
fed699f9 JW |
60 | |
61 | static int vq2q(int queue_index) | |
62 | { | |
63 | return queue_index / 2; | |
64 | } | |
65 | ||
fbe78f4f AL |
66 | /* TODO |
67 | * - we could suppress RX interrupt if we were so inclined. | |
68 | */ | |
69 | ||
0f03eca6 | 70 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f | 71 | { |
17a0ca55 | 72 | VirtIONet *n = VIRTIO_NET(vdev); |
fbe78f4f AL |
73 | struct virtio_net_config netcfg; |
74 | ||
b46d97f2 | 75 | stw_p(&netcfg.status, n->status); |
fed699f9 | 76 | stw_p(&netcfg.max_virtqueue_pairs, n->max_queues); |
79674068 | 77 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
14f9b664 | 78 | memcpy(config, &netcfg, n->config_size); |
fbe78f4f AL |
79 | } |
80 | ||
0f03eca6 AL |
81 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
82 | { | |
17a0ca55 | 83 | VirtIONet *n = VIRTIO_NET(vdev); |
14f9b664 | 84 | struct virtio_net_config netcfg = {}; |
0f03eca6 | 85 | |
14f9b664 | 86 | memcpy(&netcfg, config, n->config_size); |
0f03eca6 | 87 | |
17a0ca55 | 88 | if (!(vdev->guest_features >> VIRTIO_NET_F_CTRL_MAC_ADDR & 1) && |
c1943a3f | 89 | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
79674068 | 90 | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
b356f76d | 91 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
0f03eca6 AL |
92 | } |
93 | } | |
94 | ||
783e7706 MT |
95 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
96 | { | |
17a0ca55 | 97 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
783e7706 | 98 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && |
17a0ca55 | 99 | (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; |
783e7706 MT |
100 | } |
101 | ||
102 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) | |
afbaa7b4 | 103 | { |
17a0ca55 | 104 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b356f76d | 105 | NetClientState *nc = qemu_get_queue(n->nic); |
fed699f9 | 106 | int queues = n->multiqueue ? n->max_queues : 1; |
b356f76d JW |
107 | |
108 | if (!nc->peer) { | |
afbaa7b4 MT |
109 | return; |
110 | } | |
b356f76d | 111 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
afbaa7b4 MT |
112 | return; |
113 | } | |
114 | ||
b356f76d | 115 | if (!tap_get_vhost_net(nc->peer)) { |
afbaa7b4 MT |
116 | return; |
117 | } | |
fed699f9 | 118 | |
d7108d90 JW |
119 | if (!!n->vhost_started == |
120 | (virtio_net_started(n, status) && !nc->peer->link_down)) { | |
afbaa7b4 MT |
121 | return; |
122 | } | |
123 | if (!n->vhost_started) { | |
5430a28f | 124 | int r; |
17a0ca55 | 125 | if (!vhost_net_query(tap_get_vhost_net(nc->peer), vdev)) { |
5430a28f MT |
126 | return; |
127 | } | |
1830b80f | 128 | n->vhost_started = 1; |
17a0ca55 | 129 | r = vhost_net_start(vdev, n->nic->ncs, queues); |
afbaa7b4 | 130 | if (r < 0) { |
e7b43f7e SH |
131 | error_report("unable to start vhost net: %d: " |
132 | "falling back on userspace virtio", -r); | |
1830b80f | 133 | n->vhost_started = 0; |
afbaa7b4 MT |
134 | } |
135 | } else { | |
17a0ca55 | 136 | vhost_net_stop(vdev, n->nic->ncs, queues); |
afbaa7b4 MT |
137 | n->vhost_started = 0; |
138 | } | |
139 | } | |
140 | ||
783e7706 MT |
141 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
142 | { | |
17a0ca55 | 143 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
144 | VirtIONetQueue *q; |
145 | int i; | |
146 | uint8_t queue_status; | |
783e7706 MT |
147 | |
148 | virtio_net_vhost_status(n, status); | |
149 | ||
fed699f9 JW |
150 | for (i = 0; i < n->max_queues; i++) { |
151 | q = &n->vqs[i]; | |
783e7706 | 152 | |
fed699f9 JW |
153 | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
154 | queue_status = 0; | |
783e7706 | 155 | } else { |
fed699f9 | 156 | queue_status = status; |
783e7706 | 157 | } |
fed699f9 JW |
158 | |
159 | if (!q->tx_waiting) { | |
160 | continue; | |
161 | } | |
162 | ||
163 | if (virtio_net_started(n, queue_status) && !n->vhost_started) { | |
164 | if (q->tx_timer) { | |
bc72ad67 AB |
165 | timer_mod(q->tx_timer, |
166 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
fed699f9 JW |
167 | } else { |
168 | qemu_bh_schedule(q->tx_bh); | |
169 | } | |
783e7706 | 170 | } else { |
fed699f9 | 171 | if (q->tx_timer) { |
bc72ad67 | 172 | timer_del(q->tx_timer); |
fed699f9 JW |
173 | } else { |
174 | qemu_bh_cancel(q->tx_bh); | |
175 | } | |
783e7706 MT |
176 | } |
177 | } | |
178 | } | |
179 | ||
4e68f7a0 | 180 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 181 | { |
cc1f0f45 | 182 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 183 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
554c97dd AL |
184 | uint16_t old_status = n->status; |
185 | ||
eb6b6c12 | 186 | if (nc->link_down) |
554c97dd AL |
187 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
188 | else | |
189 | n->status |= VIRTIO_NET_S_LINK_UP; | |
190 | ||
191 | if (n->status != old_status) | |
17a0ca55 | 192 | virtio_notify_config(vdev); |
afbaa7b4 | 193 | |
17a0ca55 | 194 | virtio_net_set_status(vdev, vdev->status); |
554c97dd AL |
195 | } |
196 | ||
b1be4280 AK |
197 | static void rxfilter_notify(NetClientState *nc) |
198 | { | |
199 | QObject *event_data; | |
200 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
201 | ||
202 | if (nc->rxfilter_notify_enabled) { | |
203 | if (n->netclient_name) { | |
204 | event_data = qobject_from_jsonf("{ 'name': %s, 'path': %s }", | |
205 | n->netclient_name, | |
206 | object_get_canonical_path(OBJECT(n->qdev))); | |
207 | } else { | |
208 | event_data = qobject_from_jsonf("{ 'path': %s }", | |
209 | object_get_canonical_path(OBJECT(n->qdev))); | |
210 | } | |
211 | monitor_protocol_event(QEVENT_NIC_RX_FILTER_CHANGED, event_data); | |
212 | qobject_decref(event_data); | |
213 | ||
214 | /* disable event notification to avoid events flooding */ | |
215 | nc->rxfilter_notify_enabled = 0; | |
216 | } | |
217 | } | |
218 | ||
219 | static char *mac_strdup_printf(const uint8_t *mac) | |
220 | { | |
221 | return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", mac[0], | |
222 | mac[1], mac[2], mac[3], mac[4], mac[5]); | |
223 | } | |
224 | ||
225 | static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) | |
226 | { | |
227 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
228 | RxFilterInfo *info; | |
229 | strList *str_list, *entry; | |
230 | intList *int_list, *int_entry; | |
231 | int i, j; | |
232 | ||
233 | info = g_malloc0(sizeof(*info)); | |
234 | info->name = g_strdup(nc->name); | |
235 | info->promiscuous = n->promisc; | |
236 | ||
237 | if (n->nouni) { | |
238 | info->unicast = RX_STATE_NONE; | |
239 | } else if (n->alluni) { | |
240 | info->unicast = RX_STATE_ALL; | |
241 | } else { | |
242 | info->unicast = RX_STATE_NORMAL; | |
243 | } | |
244 | ||
245 | if (n->nomulti) { | |
246 | info->multicast = RX_STATE_NONE; | |
247 | } else if (n->allmulti) { | |
248 | info->multicast = RX_STATE_ALL; | |
249 | } else { | |
250 | info->multicast = RX_STATE_NORMAL; | |
251 | } | |
252 | ||
253 | info->broadcast_allowed = n->nobcast; | |
254 | info->multicast_overflow = n->mac_table.multi_overflow; | |
255 | info->unicast_overflow = n->mac_table.uni_overflow; | |
256 | ||
257 | info->main_mac = mac_strdup_printf(n->mac); | |
258 | ||
259 | str_list = NULL; | |
260 | for (i = 0; i < n->mac_table.first_multi; i++) { | |
261 | entry = g_malloc0(sizeof(*entry)); | |
262 | entry->value = mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); | |
263 | entry->next = str_list; | |
264 | str_list = entry; | |
265 | } | |
266 | info->unicast_table = str_list; | |
267 | ||
268 | str_list = NULL; | |
269 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
270 | entry = g_malloc0(sizeof(*entry)); | |
271 | entry->value = mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); | |
272 | entry->next = str_list; | |
273 | str_list = entry; | |
274 | } | |
275 | info->multicast_table = str_list; | |
276 | ||
277 | int_list = NULL; | |
278 | for (i = 0; i < MAX_VLAN >> 5; i++) { | |
279 | for (j = 0; n->vlans[i] && j < 0x1f; j++) { | |
280 | if (n->vlans[i] & (1U << j)) { | |
281 | int_entry = g_malloc0(sizeof(*int_entry)); | |
282 | int_entry->value = (i << 5) + j; | |
283 | int_entry->next = int_list; | |
284 | int_list = int_entry; | |
285 | } | |
286 | } | |
287 | } | |
288 | info->vlan_table = int_list; | |
289 | ||
290 | /* enable event notification after query */ | |
291 | nc->rxfilter_notify_enabled = 1; | |
292 | ||
293 | return info; | |
294 | } | |
295 | ||
002437cd AL |
296 | static void virtio_net_reset(VirtIODevice *vdev) |
297 | { | |
17a0ca55 | 298 | VirtIONet *n = VIRTIO_NET(vdev); |
002437cd AL |
299 | |
300 | /* Reset back to compatibility mode */ | |
301 | n->promisc = 1; | |
302 | n->allmulti = 0; | |
015cb166 AW |
303 | n->alluni = 0; |
304 | n->nomulti = 0; | |
305 | n->nouni = 0; | |
306 | n->nobcast = 0; | |
fed699f9 JW |
307 | /* multiqueue is disabled by default */ |
308 | n->curr_queues = 1; | |
b6503ed9 | 309 | |
f21c0ed9 | 310 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 311 | n->mac_table.in_use = 0; |
2d9aba39 | 312 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
313 | n->mac_table.multi_overflow = 0; |
314 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 315 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
41dc8a67 | 316 | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
f21c0ed9 | 317 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
318 | } |
319 | ||
6e371ab8 | 320 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 321 | { |
b356f76d JW |
322 | NetClientState *nc = qemu_get_queue(n->nic); |
323 | if (!nc->peer) { | |
6e371ab8 | 324 | return; |
b356f76d | 325 | } |
3a330134 | 326 | |
b356f76d | 327 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
6e371ab8 | 328 | return; |
b356f76d | 329 | } |
3a330134 | 330 | |
b356f76d | 331 | n->has_vnet_hdr = tap_has_vnet_hdr(nc->peer); |
6e371ab8 | 332 | } |
3a330134 | 333 | |
6e371ab8 MT |
334 | static int peer_has_vnet_hdr(VirtIONet *n) |
335 | { | |
3a330134 MM |
336 | return n->has_vnet_hdr; |
337 | } | |
338 | ||
0ce0e8f4 MM |
339 | static int peer_has_ufo(VirtIONet *n) |
340 | { | |
341 | if (!peer_has_vnet_hdr(n)) | |
342 | return 0; | |
343 | ||
b356f76d | 344 | n->has_ufo = tap_has_ufo(qemu_get_queue(n->nic)->peer); |
0ce0e8f4 MM |
345 | |
346 | return n->has_ufo; | |
347 | } | |
348 | ||
ff3a8066 MT |
349 | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) |
350 | { | |
fed699f9 JW |
351 | int i; |
352 | NetClientState *nc; | |
353 | ||
ff3a8066 MT |
354 | n->mergeable_rx_bufs = mergeable_rx_bufs; |
355 | ||
356 | n->guest_hdr_len = n->mergeable_rx_bufs ? | |
357 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
358 | ||
fed699f9 JW |
359 | for (i = 0; i < n->max_queues; i++) { |
360 | nc = qemu_get_subqueue(n->nic, i); | |
361 | ||
362 | if (peer_has_vnet_hdr(n) && | |
363 | tap_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { | |
364 | tap_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); | |
365 | n->host_hdr_len = n->guest_hdr_len; | |
366 | } | |
ff3a8066 MT |
367 | } |
368 | } | |
369 | ||
fed699f9 JW |
370 | static int peer_attach(VirtIONet *n, int index) |
371 | { | |
372 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
373 | ||
374 | if (!nc->peer) { | |
375 | return 0; | |
376 | } | |
377 | ||
378 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
379 | return 0; | |
380 | } | |
381 | ||
382 | return tap_enable(nc->peer); | |
383 | } | |
384 | ||
385 | static int peer_detach(VirtIONet *n, int index) | |
386 | { | |
387 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
388 | ||
389 | if (!nc->peer) { | |
390 | return 0; | |
391 | } | |
392 | ||
393 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
394 | return 0; | |
395 | } | |
396 | ||
397 | return tap_disable(nc->peer); | |
398 | } | |
399 | ||
400 | static void virtio_net_set_queues(VirtIONet *n) | |
401 | { | |
402 | int i; | |
403 | ||
404 | for (i = 0; i < n->max_queues; i++) { | |
405 | if (i < n->curr_queues) { | |
406 | assert(!peer_attach(n, i)); | |
407 | } else { | |
408 | assert(!peer_detach(n, i)); | |
409 | } | |
410 | } | |
411 | } | |
412 | ||
ec57db16 | 413 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); |
fed699f9 | 414 | |
8172539d | 415 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 416 | { |
17a0ca55 | 417 | VirtIONet *n = VIRTIO_NET(vdev); |
b356f76d | 418 | NetClientState *nc = qemu_get_queue(n->nic); |
fbe78f4f | 419 | |
c9f79a3f MT |
420 | features |= (1 << VIRTIO_NET_F_MAC); |
421 | ||
6e371ab8 | 422 | if (!peer_has_vnet_hdr(n)) { |
8172539d MT |
423 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); |
424 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
425 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
426 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
427 | ||
428 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
429 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
430 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
431 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
432 | } | |
3a330134 | 433 | |
8172539d MT |
434 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
435 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
436 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
437 | } |
438 | ||
b356f76d | 439 | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
9bc6304c MT |
440 | return features; |
441 | } | |
b356f76d | 442 | if (!tap_get_vhost_net(nc->peer)) { |
9bc6304c MT |
443 | return features; |
444 | } | |
b356f76d | 445 | return vhost_net_get_features(tap_get_vhost_net(nc->peer), features); |
fbe78f4f AL |
446 | } |
447 | ||
8eca6b1b AL |
448 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
449 | { | |
450 | uint32_t features = 0; | |
451 | ||
452 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
453 | * but also these: */ | |
454 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
455 | features |= (1 << VIRTIO_NET_F_CSUM); |
456 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
457 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
458 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 459 | |
8172539d | 460 | return features; |
8eca6b1b AL |
461 | } |
462 | ||
644c9858 DF |
463 | static void virtio_net_apply_guest_offloads(VirtIONet *n) |
464 | { | |
465 | tap_set_offload(qemu_get_subqueue(n->nic, 0)->peer, | |
466 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), | |
467 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), | |
468 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), | |
469 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), | |
470 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); | |
471 | } | |
472 | ||
473 | static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) | |
474 | { | |
475 | static const uint64_t guest_offloads_mask = | |
476 | (1ULL << VIRTIO_NET_F_GUEST_CSUM) | | |
477 | (1ULL << VIRTIO_NET_F_GUEST_TSO4) | | |
478 | (1ULL << VIRTIO_NET_F_GUEST_TSO6) | | |
479 | (1ULL << VIRTIO_NET_F_GUEST_ECN) | | |
480 | (1ULL << VIRTIO_NET_F_GUEST_UFO); | |
481 | ||
482 | return guest_offloads_mask & features; | |
483 | } | |
484 | ||
485 | static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) | |
486 | { | |
487 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
488 | return virtio_net_guest_offloads_by_features(vdev->guest_features); | |
489 | } | |
490 | ||
fbe78f4f AL |
491 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
492 | { | |
17a0ca55 | 493 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
494 | int i; |
495 | ||
ec57db16 | 496 | virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ))); |
fbe78f4f | 497 | |
ff3a8066 | 498 | virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF))); |
f5436dd9 MM |
499 | |
500 | if (n->has_vnet_hdr) { | |
644c9858 DF |
501 | n->curr_guest_offloads = |
502 | virtio_net_guest_offloads_by_features(features); | |
503 | virtio_net_apply_guest_offloads(n); | |
f5436dd9 | 504 | } |
fed699f9 JW |
505 | |
506 | for (i = 0; i < n->max_queues; i++) { | |
507 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
508 | ||
509 | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
510 | continue; | |
511 | } | |
512 | if (!tap_get_vhost_net(nc->peer)) { | |
513 | continue; | |
514 | } | |
515 | vhost_net_ack_features(tap_get_vhost_net(nc->peer), features); | |
dc14a397 | 516 | } |
fbe78f4f AL |
517 | } |
518 | ||
002437cd | 519 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 520 | struct iovec *iov, unsigned int iov_cnt) |
002437cd AL |
521 | { |
522 | uint8_t on; | |
921ac5d0 | 523 | size_t s; |
b1be4280 | 524 | NetClientState *nc = qemu_get_queue(n->nic); |
002437cd | 525 | |
921ac5d0 MT |
526 | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
527 | if (s != sizeof(on)) { | |
528 | return VIRTIO_NET_ERR; | |
002437cd AL |
529 | } |
530 | ||
dd23454b | 531 | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { |
002437cd | 532 | n->promisc = on; |
dd23454b | 533 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
002437cd | 534 | n->allmulti = on; |
dd23454b | 535 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
015cb166 | 536 | n->alluni = on; |
dd23454b | 537 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
015cb166 | 538 | n->nomulti = on; |
dd23454b | 539 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
015cb166 | 540 | n->nouni = on; |
dd23454b | 541 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
015cb166 | 542 | n->nobcast = on; |
921ac5d0 | 543 | } else { |
002437cd | 544 | return VIRTIO_NET_ERR; |
921ac5d0 | 545 | } |
002437cd | 546 | |
b1be4280 AK |
547 | rxfilter_notify(nc); |
548 | ||
002437cd AL |
549 | return VIRTIO_NET_OK; |
550 | } | |
551 | ||
644c9858 DF |
552 | static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, |
553 | struct iovec *iov, unsigned int iov_cnt) | |
554 | { | |
555 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
556 | uint64_t offloads; | |
557 | size_t s; | |
558 | ||
559 | if (!((1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) & vdev->guest_features)) { | |
560 | return VIRTIO_NET_ERR; | |
561 | } | |
562 | ||
563 | s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); | |
564 | if (s != sizeof(offloads)) { | |
565 | return VIRTIO_NET_ERR; | |
566 | } | |
567 | ||
568 | if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { | |
569 | uint64_t supported_offloads; | |
570 | ||
571 | if (!n->has_vnet_hdr) { | |
572 | return VIRTIO_NET_ERR; | |
573 | } | |
574 | ||
575 | supported_offloads = virtio_net_supported_guest_offloads(n); | |
576 | if (offloads & ~supported_offloads) { | |
577 | return VIRTIO_NET_ERR; | |
578 | } | |
579 | ||
580 | n->curr_guest_offloads = offloads; | |
581 | virtio_net_apply_guest_offloads(n); | |
582 | ||
583 | return VIRTIO_NET_OK; | |
584 | } else { | |
585 | return VIRTIO_NET_ERR; | |
586 | } | |
587 | } | |
588 | ||
b6503ed9 | 589 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 590 | struct iovec *iov, unsigned int iov_cnt) |
b6503ed9 AL |
591 | { |
592 | struct virtio_net_ctrl_mac mac_data; | |
921ac5d0 | 593 | size_t s; |
b1be4280 | 594 | NetClientState *nc = qemu_get_queue(n->nic); |
b6503ed9 | 595 | |
c1943a3f AK |
596 | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { |
597 | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { | |
598 | return VIRTIO_NET_ERR; | |
599 | } | |
600 | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); | |
601 | assert(s == sizeof(n->mac)); | |
b356f76d | 602 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
b1be4280 AK |
603 | rxfilter_notify(nc); |
604 | ||
c1943a3f AK |
605 | return VIRTIO_NET_OK; |
606 | } | |
607 | ||
921ac5d0 | 608 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { |
b6503ed9 | 609 | return VIRTIO_NET_ERR; |
921ac5d0 | 610 | } |
b6503ed9 AL |
611 | |
612 | n->mac_table.in_use = 0; | |
2d9aba39 | 613 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
614 | n->mac_table.uni_overflow = 0; |
615 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
616 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
617 | ||
921ac5d0 MT |
618 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
619 | sizeof(mac_data.entries)); | |
620 | mac_data.entries = ldl_p(&mac_data.entries); | |
621 | if (s != sizeof(mac_data.entries)) { | |
b1be4280 | 622 | goto error; |
921ac5d0 MT |
623 | } |
624 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 625 | |
921ac5d0 | 626 | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { |
b1be4280 | 627 | goto error; |
921ac5d0 | 628 | } |
b6503ed9 AL |
629 | |
630 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
921ac5d0 MT |
631 | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs, |
632 | mac_data.entries * ETH_ALEN); | |
633 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 634 | goto error; |
921ac5d0 | 635 | } |
b6503ed9 AL |
636 | n->mac_table.in_use += mac_data.entries; |
637 | } else { | |
8fd2a2f1 | 638 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
639 | } |
640 | ||
921ac5d0 MT |
641 | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
642 | ||
2d9aba39 AW |
643 | n->mac_table.first_multi = n->mac_table.in_use; |
644 | ||
921ac5d0 MT |
645 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
646 | sizeof(mac_data.entries)); | |
647 | mac_data.entries = ldl_p(&mac_data.entries); | |
648 | if (s != sizeof(mac_data.entries)) { | |
b1be4280 | 649 | goto error; |
921ac5d0 MT |
650 | } |
651 | ||
652 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 653 | |
921ac5d0 | 654 | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { |
b1be4280 | 655 | goto error; |
921ac5d0 | 656 | } |
b6503ed9 | 657 | |
921ac5d0 MT |
658 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { |
659 | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs, | |
660 | mac_data.entries * ETH_ALEN); | |
661 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 662 | goto error; |
8fd2a2f1 | 663 | } |
921ac5d0 MT |
664 | n->mac_table.in_use += mac_data.entries; |
665 | } else { | |
666 | n->mac_table.multi_overflow = 1; | |
b6503ed9 AL |
667 | } |
668 | ||
b1be4280 AK |
669 | rxfilter_notify(nc); |
670 | ||
b6503ed9 | 671 | return VIRTIO_NET_OK; |
b1be4280 AK |
672 | |
673 | error: | |
674 | rxfilter_notify(nc); | |
675 | return VIRTIO_NET_ERR; | |
b6503ed9 AL |
676 | } |
677 | ||
f21c0ed9 | 678 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 679 | struct iovec *iov, unsigned int iov_cnt) |
f21c0ed9 AL |
680 | { |
681 | uint16_t vid; | |
921ac5d0 | 682 | size_t s; |
b1be4280 | 683 | NetClientState *nc = qemu_get_queue(n->nic); |
f21c0ed9 | 684 | |
921ac5d0 MT |
685 | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
686 | vid = lduw_p(&vid); | |
687 | if (s != sizeof(vid)) { | |
f21c0ed9 AL |
688 | return VIRTIO_NET_ERR; |
689 | } | |
690 | ||
f21c0ed9 AL |
691 | if (vid >= MAX_VLAN) |
692 | return VIRTIO_NET_ERR; | |
693 | ||
694 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
695 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
696 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
697 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
698 | else | |
699 | return VIRTIO_NET_ERR; | |
700 | ||
b1be4280 AK |
701 | rxfilter_notify(nc); |
702 | ||
f21c0ed9 AL |
703 | return VIRTIO_NET_OK; |
704 | } | |
705 | ||
fed699f9 | 706 | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
f8f7c533 | 707 | struct iovec *iov, unsigned int iov_cnt) |
fed699f9 | 708 | { |
17a0ca55 | 709 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f8f7c533 JW |
710 | struct virtio_net_ctrl_mq mq; |
711 | size_t s; | |
712 | uint16_t queues; | |
fed699f9 | 713 | |
f8f7c533 JW |
714 | s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); |
715 | if (s != sizeof(mq)) { | |
fed699f9 JW |
716 | return VIRTIO_NET_ERR; |
717 | } | |
718 | ||
719 | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { | |
720 | return VIRTIO_NET_ERR; | |
721 | } | |
722 | ||
f8f7c533 | 723 | queues = lduw_p(&mq.virtqueue_pairs); |
fed699f9 | 724 | |
f8f7c533 JW |
725 | if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || |
726 | queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
727 | queues > n->max_queues || | |
fed699f9 JW |
728 | !n->multiqueue) { |
729 | return VIRTIO_NET_ERR; | |
730 | } | |
731 | ||
f8f7c533 | 732 | n->curr_queues = queues; |
fed699f9 JW |
733 | /* stop the backend before changing the number of queues to avoid handling a |
734 | * disabled queue */ | |
17a0ca55 | 735 | virtio_net_set_status(vdev, vdev->status); |
fed699f9 JW |
736 | virtio_net_set_queues(n); |
737 | ||
738 | return VIRTIO_NET_OK; | |
739 | } | |
3d11d36c AL |
740 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
741 | { | |
17a0ca55 | 742 | VirtIONet *n = VIRTIO_NET(vdev); |
3d11d36c AL |
743 | struct virtio_net_ctrl_hdr ctrl; |
744 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
745 | VirtQueueElement elem; | |
921ac5d0 MT |
746 | size_t s; |
747 | struct iovec *iov; | |
748 | unsigned int iov_cnt; | |
3d11d36c AL |
749 | |
750 | while (virtqueue_pop(vq, &elem)) { | |
921ac5d0 MT |
751 | if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || |
752 | iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { | |
e7b43f7e | 753 | error_report("virtio-net ctrl missing headers"); |
3d11d36c AL |
754 | exit(1); |
755 | } | |
756 | ||
921ac5d0 MT |
757 | iov = elem.out_sg; |
758 | iov_cnt = elem.out_num; | |
759 | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); | |
760 | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); | |
761 | if (s != sizeof(ctrl)) { | |
762 | status = VIRTIO_NET_ERR; | |
dd23454b | 763 | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
921ac5d0 MT |
764 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
765 | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { | |
766 | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); | |
767 | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { | |
768 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); | |
fed699f9 | 769 | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
f8f7c533 | 770 | status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); |
644c9858 DF |
771 | } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { |
772 | status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); | |
3d11d36c AL |
773 | } |
774 | ||
921ac5d0 MT |
775 | s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); |
776 | assert(s == sizeof(status)); | |
3d11d36c AL |
777 | |
778 | virtqueue_push(vq, &elem, sizeof(status)); | |
779 | virtio_notify(vdev, vq); | |
780 | } | |
781 | } | |
782 | ||
fbe78f4f AL |
783 | /* RX */ |
784 | ||
785 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
786 | { | |
17a0ca55 | 787 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 788 | int queue_index = vq2q(virtio_get_queue_index(vq)); |
8aeff62d | 789 | |
fed699f9 | 790 | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
fbe78f4f AL |
791 | } |
792 | ||
4e68f7a0 | 793 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 794 | { |
cc1f0f45 | 795 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 796 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fed699f9 | 797 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
0c87e93e | 798 | |
17a0ca55 | 799 | if (!vdev->vm_running) { |
95477323 MT |
800 | return 0; |
801 | } | |
cdd5cc12 | 802 | |
fed699f9 JW |
803 | if (nc->queue_index >= n->curr_queues) { |
804 | return 0; | |
805 | } | |
806 | ||
0c87e93e | 807 | if (!virtio_queue_ready(q->rx_vq) || |
17a0ca55 | 808 | !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 809 | return 0; |
0c87e93e | 810 | } |
fbe78f4f | 811 | |
cdd5cc12 MM |
812 | return 1; |
813 | } | |
814 | ||
0c87e93e | 815 | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
cdd5cc12 | 816 | { |
0c87e93e JW |
817 | VirtIONet *n = q->n; |
818 | if (virtio_queue_empty(q->rx_vq) || | |
fbe78f4f | 819 | (n->mergeable_rx_bufs && |
0c87e93e JW |
820 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
821 | virtio_queue_set_notification(q->rx_vq, 1); | |
06b12970 TL |
822 | |
823 | /* To avoid a race condition where the guest has made some buffers | |
824 | * available after the above check but before notification was | |
825 | * enabled, check for available buffers again. | |
826 | */ | |
0c87e93e | 827 | if (virtio_queue_empty(q->rx_vq) || |
06b12970 | 828 | (n->mergeable_rx_bufs && |
0c87e93e | 829 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
06b12970 | 830 | return 0; |
0c87e93e | 831 | } |
fbe78f4f AL |
832 | } |
833 | ||
0c87e93e | 834 | virtio_queue_set_notification(q->rx_vq, 0); |
fbe78f4f AL |
835 | return 1; |
836 | } | |
837 | ||
1d41b0c1 AL |
838 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
839 | * it never finds out that the packets don't have valid checksums. This | |
840 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
841 | * fix this with Xen but it hasn't appeared in an upstream release of | |
842 | * dhclient yet. | |
843 | * | |
844 | * To avoid breaking existing guests, we catch udp packets and add | |
845 | * checksums. This is terrible but it's better than hacking the guest | |
846 | * kernels. | |
847 | * | |
848 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
849 | * we should provide a mechanism to disable it to avoid polluting the host | |
850 | * cache. | |
851 | */ | |
852 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 853 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
854 | { |
855 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
856 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
857 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
858 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
859 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 860 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
861 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
862 | } | |
863 | } | |
864 | ||
280598b7 MT |
865 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
866 | const void *buf, size_t size) | |
fbe78f4f | 867 | { |
3a330134 | 868 | if (n->has_vnet_hdr) { |
22cc84db MT |
869 | /* FIXME this cast is evil */ |
870 | void *wbuf = (void *)buf; | |
280598b7 MT |
871 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
872 | size - n->host_hdr_len); | |
873 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); | |
22cc84db MT |
874 | } else { |
875 | struct virtio_net_hdr hdr = { | |
876 | .flags = 0, | |
877 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
878 | }; | |
879 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 880 | } |
fbe78f4f AL |
881 | } |
882 | ||
3831ab20 AL |
883 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
884 | { | |
885 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 886 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 887 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 888 | int i; |
3831ab20 AL |
889 | |
890 | if (n->promisc) | |
891 | return 1; | |
892 | ||
e043ebc6 | 893 | ptr += n->host_hdr_len; |
3a330134 | 894 | |
f21c0ed9 AL |
895 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
896 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
897 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
898 | return 0; | |
899 | } | |
900 | ||
bbe2f399 AW |
901 | if (ptr[0] & 1) { // multicast |
902 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
903 | return !n->nobcast; |
904 | } else if (n->nomulti) { | |
905 | return 0; | |
8fd2a2f1 | 906 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
907 | return 1; |
908 | } | |
2d9aba39 AW |
909 | |
910 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
911 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
912 | return 1; | |
913 | } | |
914 | } | |
bbe2f399 | 915 | } else { // unicast |
015cb166 AW |
916 | if (n->nouni) { |
917 | return 0; | |
918 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
919 | return 1; |
920 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
921 | return 1; |
922 | } | |
3831ab20 | 923 | |
2d9aba39 AW |
924 | for (i = 0; i < n->mac_table.first_multi; i++) { |
925 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
926 | return 1; | |
927 | } | |
928 | } | |
b6503ed9 AL |
929 | } |
930 | ||
3831ab20 AL |
931 | return 0; |
932 | } | |
933 | ||
4e68f7a0 | 934 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 935 | { |
cc1f0f45 | 936 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 937 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 938 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
63c58728 MT |
939 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
940 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
941 | unsigned mhdr_cnt = 0; | |
22cc84db | 942 | size_t offset, i, guest_offset; |
fbe78f4f | 943 | |
fed699f9 | 944 | if (!virtio_net_can_receive(nc)) { |
cdd5cc12 | 945 | return -1; |
b356f76d | 946 | } |
cdd5cc12 | 947 | |
940cda94 | 948 | /* hdr_len refers to the header we supply to the guest */ |
0c87e93e | 949 | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { |
8aeff62d | 950 | return 0; |
0c87e93e | 951 | } |
fbe78f4f | 952 | |
3831ab20 | 953 | if (!receive_filter(n, buf, size)) |
4f1c942b | 954 | return size; |
3831ab20 | 955 | |
fbe78f4f AL |
956 | offset = i = 0; |
957 | ||
958 | while (offset < size) { | |
959 | VirtQueueElement elem; | |
960 | int len, total; | |
22cc84db | 961 | const struct iovec *sg = elem.in_sg; |
fbe78f4f | 962 | |
22c253d9 | 963 | total = 0; |
fbe78f4f | 964 | |
0c87e93e | 965 | if (virtqueue_pop(q->rx_vq, &elem) == 0) { |
fbe78f4f | 966 | if (i == 0) |
4f1c942b | 967 | return -1; |
e7b43f7e | 968 | error_report("virtio-net unexpected empty queue: " |
279a4253 | 969 | "i %zd mergeable %d offset %zd, size %zd, " |
e7b43f7e | 970 | "guest hdr len %zd, host hdr len %zd guest features 0x%x", |
279a4253 | 971 | i, n->mergeable_rx_bufs, offset, size, |
17a0ca55 | 972 | n->guest_hdr_len, n->host_hdr_len, vdev->guest_features); |
fbe78f4f AL |
973 | exit(1); |
974 | } | |
975 | ||
976 | if (elem.in_num < 1) { | |
e7b43f7e | 977 | error_report("virtio-net receive queue contains no in buffers"); |
fbe78f4f AL |
978 | exit(1); |
979 | } | |
980 | ||
fbe78f4f | 981 | if (i == 0) { |
c8d28e7e | 982 | assert(offset == 0); |
63c58728 MT |
983 | if (n->mergeable_rx_bufs) { |
984 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
985 | sg, elem.in_num, | |
986 | offsetof(typeof(mhdr), num_buffers), | |
987 | sizeof(mhdr.num_buffers)); | |
988 | } | |
fbe78f4f | 989 | |
c8d28e7e MT |
990 | receive_header(n, sg, elem.in_num, buf, size); |
991 | offset = n->host_hdr_len; | |
e35e23f6 | 992 | total += n->guest_hdr_len; |
22cc84db MT |
993 | guest_offset = n->guest_hdr_len; |
994 | } else { | |
995 | guest_offset = 0; | |
fbe78f4f AL |
996 | } |
997 | ||
998 | /* copy in packet. ugh */ | |
22cc84db | 999 | len = iov_from_buf(sg, elem.in_num, guest_offset, |
dcf6f5e1 | 1000 | buf + offset, size - offset); |
fbe78f4f | 1001 | total += len; |
279a4253 MT |
1002 | offset += len; |
1003 | /* If buffers can't be merged, at this point we | |
1004 | * must have consumed the complete packet. | |
1005 | * Otherwise, drop it. */ | |
1006 | if (!n->mergeable_rx_bufs && offset < size) { | |
1007 | #if 0 | |
e7b43f7e SH |
1008 | error_report("virtio-net truncated non-mergeable packet: " |
1009 | "i %zd mergeable %d offset %zd, size %zd, " | |
1010 | "guest hdr len %zd, host hdr len %zd", | |
1011 | i, n->mergeable_rx_bufs, | |
e35e23f6 | 1012 | offset, size, n->guest_hdr_len, n->host_hdr_len); |
279a4253 MT |
1013 | #endif |
1014 | return size; | |
1015 | } | |
fbe78f4f AL |
1016 | |
1017 | /* signal other side */ | |
0c87e93e | 1018 | virtqueue_fill(q->rx_vq, &elem, total, i++); |
fbe78f4f AL |
1019 | } |
1020 | ||
63c58728 MT |
1021 | if (mhdr_cnt) { |
1022 | stw_p(&mhdr.num_buffers, i); | |
1023 | iov_from_buf(mhdr_sg, mhdr_cnt, | |
1024 | 0, | |
1025 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 1026 | } |
fbe78f4f | 1027 | |
0c87e93e | 1028 | virtqueue_flush(q->rx_vq, i); |
17a0ca55 | 1029 | virtio_notify(vdev, q->rx_vq); |
4f1c942b MM |
1030 | |
1031 | return size; | |
fbe78f4f AL |
1032 | } |
1033 | ||
0c87e93e | 1034 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q); |
6243375f | 1035 | |
4e68f7a0 | 1036 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 1037 | { |
cc1f0f45 | 1038 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1039 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1040 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
6243375f | 1041 | |
0c87e93e | 1042 | virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); |
17a0ca55 | 1043 | virtio_notify(vdev, q->tx_vq); |
6243375f | 1044 | |
0c87e93e | 1045 | q->async_tx.elem.out_num = q->async_tx.len = 0; |
6243375f | 1046 | |
0c87e93e JW |
1047 | virtio_queue_set_notification(q->tx_vq, 1); |
1048 | virtio_net_flush_tx(q); | |
6243375f MM |
1049 | } |
1050 | ||
fbe78f4f | 1051 | /* TX */ |
0c87e93e | 1052 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q) |
fbe78f4f | 1053 | { |
0c87e93e | 1054 | VirtIONet *n = q->n; |
17a0ca55 | 1055 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fbe78f4f | 1056 | VirtQueueElement elem; |
e3f30488 | 1057 | int32_t num_packets = 0; |
fed699f9 | 1058 | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); |
17a0ca55 | 1059 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
e3f30488 AW |
1060 | return num_packets; |
1061 | } | |
fbe78f4f | 1062 | |
17a0ca55 | 1063 | assert(vdev->vm_running); |
783e7706 | 1064 | |
0c87e93e JW |
1065 | if (q->async_tx.elem.out_num) { |
1066 | virtio_queue_set_notification(q->tx_vq, 0); | |
e3f30488 | 1067 | return num_packets; |
6243375f MM |
1068 | } |
1069 | ||
0c87e93e | 1070 | while (virtqueue_pop(q->tx_vq, &elem)) { |
14761f9c | 1071 | ssize_t ret, len; |
fbe78f4f AL |
1072 | unsigned int out_num = elem.out_num; |
1073 | struct iovec *out_sg = &elem.out_sg[0]; | |
14761f9c | 1074 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; |
fbe78f4f | 1075 | |
7b80d08e | 1076 | if (out_num < 1) { |
e7b43f7e | 1077 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
1078 | exit(1); |
1079 | } | |
1080 | ||
14761f9c MT |
1081 | /* |
1082 | * If host wants to see the guest header as is, we can | |
1083 | * pass it on unchanged. Otherwise, copy just the parts | |
1084 | * that host is interested in. | |
1085 | */ | |
1086 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
1087 | if (n->host_hdr_len != n->guest_hdr_len) { | |
1088 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
1089 | out_sg, out_num, | |
1090 | 0, n->host_hdr_len); | |
1091 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
1092 | out_sg, out_num, | |
1093 | n->guest_hdr_len, -1); | |
1094 | out_num = sg_num; | |
1095 | out_sg = sg; | |
fbe78f4f AL |
1096 | } |
1097 | ||
7b80d08e | 1098 | len = n->guest_hdr_len; |
14761f9c | 1099 | |
fed699f9 JW |
1100 | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
1101 | out_sg, out_num, virtio_net_tx_complete); | |
6243375f | 1102 | if (ret == 0) { |
0c87e93e JW |
1103 | virtio_queue_set_notification(q->tx_vq, 0); |
1104 | q->async_tx.elem = elem; | |
1105 | q->async_tx.len = len; | |
e3f30488 | 1106 | return -EBUSY; |
6243375f MM |
1107 | } |
1108 | ||
1109 | len += ret; | |
fbe78f4f | 1110 | |
0c87e93e | 1111 | virtqueue_push(q->tx_vq, &elem, 0); |
17a0ca55 | 1112 | virtio_notify(vdev, q->tx_vq); |
e3f30488 AW |
1113 | |
1114 | if (++num_packets >= n->tx_burst) { | |
1115 | break; | |
1116 | } | |
fbe78f4f | 1117 | } |
e3f30488 | 1118 | return num_packets; |
fbe78f4f AL |
1119 | } |
1120 | ||
a697a334 | 1121 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f | 1122 | { |
17a0ca55 | 1123 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1124 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
fbe78f4f | 1125 | |
783e7706 | 1126 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 1127 | if (!vdev->vm_running) { |
0c87e93e | 1128 | q->tx_waiting = 1; |
783e7706 MT |
1129 | return; |
1130 | } | |
1131 | ||
0c87e93e | 1132 | if (q->tx_waiting) { |
fbe78f4f | 1133 | virtio_queue_set_notification(vq, 1); |
bc72ad67 | 1134 | timer_del(q->tx_timer); |
0c87e93e JW |
1135 | q->tx_waiting = 0; |
1136 | virtio_net_flush_tx(q); | |
fbe78f4f | 1137 | } else { |
bc72ad67 AB |
1138 | timer_mod(q->tx_timer, |
1139 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
0c87e93e | 1140 | q->tx_waiting = 1; |
fbe78f4f AL |
1141 | virtio_queue_set_notification(vq, 0); |
1142 | } | |
1143 | } | |
1144 | ||
a697a334 AW |
1145 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
1146 | { | |
17a0ca55 | 1147 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1148 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
a697a334 | 1149 | |
0c87e93e | 1150 | if (unlikely(q->tx_waiting)) { |
a697a334 AW |
1151 | return; |
1152 | } | |
0c87e93e | 1153 | q->tx_waiting = 1; |
783e7706 | 1154 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 1155 | if (!vdev->vm_running) { |
783e7706 MT |
1156 | return; |
1157 | } | |
a697a334 | 1158 | virtio_queue_set_notification(vq, 0); |
0c87e93e | 1159 | qemu_bh_schedule(q->tx_bh); |
a697a334 AW |
1160 | } |
1161 | ||
fbe78f4f AL |
1162 | static void virtio_net_tx_timer(void *opaque) |
1163 | { | |
0c87e93e JW |
1164 | VirtIONetQueue *q = opaque; |
1165 | VirtIONet *n = q->n; | |
17a0ca55 FK |
1166 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
1167 | assert(vdev->vm_running); | |
fbe78f4f | 1168 | |
0c87e93e | 1169 | q->tx_waiting = 0; |
fbe78f4f AL |
1170 | |
1171 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 1172 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 1173 | return; |
17a0ca55 | 1174 | } |
fbe78f4f | 1175 | |
0c87e93e JW |
1176 | virtio_queue_set_notification(q->tx_vq, 1); |
1177 | virtio_net_flush_tx(q); | |
fbe78f4f AL |
1178 | } |
1179 | ||
a697a334 AW |
1180 | static void virtio_net_tx_bh(void *opaque) |
1181 | { | |
0c87e93e JW |
1182 | VirtIONetQueue *q = opaque; |
1183 | VirtIONet *n = q->n; | |
17a0ca55 | 1184 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
a697a334 AW |
1185 | int32_t ret; |
1186 | ||
17a0ca55 | 1187 | assert(vdev->vm_running); |
783e7706 | 1188 | |
0c87e93e | 1189 | q->tx_waiting = 0; |
a697a334 AW |
1190 | |
1191 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 1192 | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { |
a697a334 | 1193 | return; |
17a0ca55 | 1194 | } |
a697a334 | 1195 | |
0c87e93e | 1196 | ret = virtio_net_flush_tx(q); |
a697a334 AW |
1197 | if (ret == -EBUSY) { |
1198 | return; /* Notification re-enable handled by tx_complete */ | |
1199 | } | |
1200 | ||
1201 | /* If we flush a full burst of packets, assume there are | |
1202 | * more coming and immediately reschedule */ | |
1203 | if (ret >= n->tx_burst) { | |
0c87e93e JW |
1204 | qemu_bh_schedule(q->tx_bh); |
1205 | q->tx_waiting = 1; | |
a697a334 AW |
1206 | return; |
1207 | } | |
1208 | ||
1209 | /* If less than a full burst, re-enable notification and flush | |
1210 | * anything that may have come in while we weren't looking. If | |
1211 | * we find something, assume the guest is still active and reschedule */ | |
0c87e93e JW |
1212 | virtio_queue_set_notification(q->tx_vq, 1); |
1213 | if (virtio_net_flush_tx(q) > 0) { | |
1214 | virtio_queue_set_notification(q->tx_vq, 0); | |
1215 | qemu_bh_schedule(q->tx_bh); | |
1216 | q->tx_waiting = 1; | |
a697a334 AW |
1217 | } |
1218 | } | |
1219 | ||
ec57db16 | 1220 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) |
fed699f9 | 1221 | { |
17a0ca55 | 1222 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fed699f9 JW |
1223 | int i, max = multiqueue ? n->max_queues : 1; |
1224 | ||
1225 | n->multiqueue = multiqueue; | |
1226 | ||
1227 | for (i = 2; i <= n->max_queues * 2 + 1; i++) { | |
1228 | virtio_del_queue(vdev, i); | |
1229 | } | |
1230 | ||
1231 | for (i = 1; i < max; i++) { | |
1232 | n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); | |
1233 | if (n->vqs[i].tx_timer) { | |
1234 | n->vqs[i].tx_vq = | |
1235 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); | |
bc72ad67 | 1236 | n->vqs[i].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
fed699f9 JW |
1237 | virtio_net_tx_timer, |
1238 | &n->vqs[i]); | |
1239 | } else { | |
1240 | n->vqs[i].tx_vq = | |
1241 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); | |
1242 | n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); | |
1243 | } | |
1244 | ||
1245 | n->vqs[i].tx_waiting = 0; | |
1246 | n->vqs[i].n = n; | |
1247 | } | |
1248 | ||
ec57db16 JW |
1249 | /* Note: Minux Guests (version 3.2.1) use ctrl vq but don't ack |
1250 | * VIRTIO_NET_F_CTRL_VQ. Create ctrl vq unconditionally to avoid | |
1251 | * breaking them. | |
1252 | */ | |
1253 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); | |
fed699f9 JW |
1254 | |
1255 | virtio_net_set_queues(n); | |
1256 | } | |
1257 | ||
fbe78f4f AL |
1258 | static void virtio_net_save(QEMUFile *f, void *opaque) |
1259 | { | |
5f800801 | 1260 | int i; |
fbe78f4f | 1261 | VirtIONet *n = opaque; |
17a0ca55 | 1262 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fbe78f4f | 1263 | |
afbaa7b4 MT |
1264 | /* At this point, backend must be stopped, otherwise |
1265 | * it might keep writing to memory. */ | |
1266 | assert(!n->vhost_started); | |
17a0ca55 | 1267 | virtio_save(vdev, f); |
fbe78f4f | 1268 | |
79674068 | 1269 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1270 | qemu_put_be32(f, n->vqs[0].tx_waiting); |
e46cb38f | 1271 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 1272 | qemu_put_be16(f, n->status); |
f10c592e AW |
1273 | qemu_put_byte(f, n->promisc); |
1274 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
1275 | qemu_put_be32(f, n->mac_table.in_use); |
1276 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 1277 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 1278 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
1279 | qemu_put_byte(f, n->mac_table.multi_overflow); |
1280 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
1281 | qemu_put_byte(f, n->alluni); |
1282 | qemu_put_byte(f, n->nomulti); | |
1283 | qemu_put_byte(f, n->nouni); | |
1284 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 1285 | qemu_put_byte(f, n->has_ufo); |
5f800801 JW |
1286 | if (n->max_queues > 1) { |
1287 | qemu_put_be16(f, n->max_queues); | |
1288 | qemu_put_be16(f, n->curr_queues); | |
1289 | for (i = 1; i < n->curr_queues; i++) { | |
1290 | qemu_put_be32(f, n->vqs[i].tx_waiting); | |
1291 | } | |
1292 | } | |
644c9858 DF |
1293 | |
1294 | if ((1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) & vdev->guest_features) { | |
1295 | qemu_put_be64(f, n->curr_guest_offloads); | |
1296 | } | |
fbe78f4f AL |
1297 | } |
1298 | ||
1299 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
1300 | { | |
1301 | VirtIONet *n = opaque; | |
17a0ca55 | 1302 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
5f800801 | 1303 | int ret, i, link_down; |
fbe78f4f | 1304 | |
9d6271b8 | 1305 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
1306 | return -EINVAL; |
1307 | ||
17a0ca55 | 1308 | ret = virtio_load(vdev, f); |
2a633c46 OW |
1309 | if (ret) { |
1310 | return ret; | |
1311 | } | |
fbe78f4f | 1312 | |
79674068 | 1313 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1314 | n->vqs[0].tx_waiting = qemu_get_be32(f); |
ff3a8066 MT |
1315 | |
1316 | virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f)); | |
fbe78f4f | 1317 | |
9d6271b8 AL |
1318 | if (version_id >= 3) |
1319 | n->status = qemu_get_be16(f); | |
1320 | ||
002437cd | 1321 | if (version_id >= 4) { |
f10c592e AW |
1322 | if (version_id < 8) { |
1323 | n->promisc = qemu_get_be32(f); | |
1324 | n->allmulti = qemu_get_be32(f); | |
1325 | } else { | |
1326 | n->promisc = qemu_get_byte(f); | |
1327 | n->allmulti = qemu_get_byte(f); | |
1328 | } | |
002437cd AL |
1329 | } |
1330 | ||
b6503ed9 AL |
1331 | if (version_id >= 5) { |
1332 | n->mac_table.in_use = qemu_get_be32(f); | |
1333 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
1334 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
1335 | qemu_get_buffer(f, n->mac_table.macs, | |
1336 | n->mac_table.in_use * ETH_ALEN); | |
1337 | } else if (n->mac_table.in_use) { | |
e398d61b JQ |
1338 | uint8_t *buf = g_malloc0(n->mac_table.in_use); |
1339 | qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN); | |
1340 | g_free(buf); | |
8fd2a2f1 | 1341 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
1342 | n->mac_table.in_use = 0; |
1343 | } | |
1344 | } | |
1345 | ||
f21c0ed9 AL |
1346 | if (version_id >= 6) |
1347 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
1348 | ||
3a330134 MM |
1349 | if (version_id >= 7) { |
1350 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 1351 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
1352 | return -1; |
1353 | } | |
6c042c16 AW |
1354 | } |
1355 | ||
8fd2a2f1 AW |
1356 | if (version_id >= 9) { |
1357 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
1358 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
1359 | } | |
1360 | ||
015cb166 AW |
1361 | if (version_id >= 10) { |
1362 | n->alluni = qemu_get_byte(f); | |
1363 | n->nomulti = qemu_get_byte(f); | |
1364 | n->nouni = qemu_get_byte(f); | |
1365 | n->nobcast = qemu_get_byte(f); | |
1366 | } | |
1367 | ||
0ce0e8f4 MM |
1368 | if (version_id >= 11) { |
1369 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 1370 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
1371 | return -1; |
1372 | } | |
1373 | } | |
1374 | ||
5f800801 JW |
1375 | if (n->max_queues > 1) { |
1376 | if (n->max_queues != qemu_get_be16(f)) { | |
1377 | error_report("virtio-net: different max_queues "); | |
1378 | return -1; | |
1379 | } | |
1380 | ||
1381 | n->curr_queues = qemu_get_be16(f); | |
1382 | for (i = 1; i < n->curr_queues; i++) { | |
1383 | n->vqs[i].tx_waiting = qemu_get_be32(f); | |
1384 | } | |
1385 | } | |
1386 | ||
644c9858 DF |
1387 | if ((1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) & vdev->guest_features) { |
1388 | n->curr_guest_offloads = qemu_get_be64(f); | |
1389 | } else { | |
1390 | n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); | |
1391 | } | |
1392 | ||
1393 | if (peer_has_vnet_hdr(n)) { | |
1394 | virtio_net_apply_guest_offloads(n); | |
1395 | } | |
1396 | ||
5f800801 JW |
1397 | virtio_net_set_queues(n); |
1398 | ||
2d9aba39 AW |
1399 | /* Find the first multicast entry in the saved MAC filter */ |
1400 | for (i = 0; i < n->mac_table.in_use; i++) { | |
1401 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
1402 | break; | |
1403 | } | |
1404 | } | |
1405 | n->mac_table.first_multi = i; | |
98991481 AK |
1406 | |
1407 | /* nc.link_down can't be migrated, so infer link_down according | |
1408 | * to link status bit in n->status */ | |
5f800801 JW |
1409 | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; |
1410 | for (i = 0; i < n->max_queues; i++) { | |
1411 | qemu_get_subqueue(n->nic, i)->link_down = link_down; | |
1412 | } | |
98991481 | 1413 | |
fbe78f4f AL |
1414 | return 0; |
1415 | } | |
1416 | ||
4e68f7a0 | 1417 | static void virtio_net_cleanup(NetClientState *nc) |
b946a153 | 1418 | { |
cc1f0f45 | 1419 | VirtIONet *n = qemu_get_nic_opaque(nc); |
b946a153 | 1420 | |
eb6b6c12 | 1421 | n->nic = NULL; |
b946a153 AL |
1422 | } |
1423 | ||
eb6b6c12 | 1424 | static NetClientInfo net_virtio_info = { |
2be64a68 | 1425 | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
eb6b6c12 MM |
1426 | .size = sizeof(NICState), |
1427 | .can_receive = virtio_net_can_receive, | |
1428 | .receive = virtio_net_receive, | |
1429 | .cleanup = virtio_net_cleanup, | |
1430 | .link_status_changed = virtio_net_set_link_status, | |
b1be4280 | 1431 | .query_rx_filter = virtio_net_query_rxfilter, |
eb6b6c12 MM |
1432 | }; |
1433 | ||
f56a1247 MT |
1434 | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
1435 | { | |
17a0ca55 | 1436 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1437 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1438 | assert(n->vhost_started); |
b356f76d | 1439 | return vhost_net_virtqueue_pending(tap_get_vhost_net(nc->peer), idx); |
f56a1247 MT |
1440 | } |
1441 | ||
1442 | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, | |
1443 | bool mask) | |
1444 | { | |
17a0ca55 | 1445 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1446 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1447 | assert(n->vhost_started); |
b356f76d | 1448 | vhost_net_virtqueue_mask(tap_get_vhost_net(nc->peer), |
f56a1247 MT |
1449 | vdev, idx, mask); |
1450 | } | |
1451 | ||
17ec5a86 | 1452 | void virtio_net_set_config_size(VirtIONet *n, uint32_t host_features) |
fbe78f4f | 1453 | { |
14f9b664 | 1454 | int i, config_size = 0; |
e9016ee2 | 1455 | host_features |= (1 << VIRTIO_NET_F_MAC); |
14f9b664 JL |
1456 | for (i = 0; feature_sizes[i].flags != 0; i++) { |
1457 | if (host_features & feature_sizes[i].flags) { | |
1458 | config_size = MAX(feature_sizes[i].end, config_size); | |
1459 | } | |
1460 | } | |
17ec5a86 FK |
1461 | n->config_size = config_size; |
1462 | } | |
1463 | ||
8a253ec2 FK |
1464 | void virtio_net_set_netclient_name(VirtIONet *n, const char *name, |
1465 | const char *type) | |
1466 | { | |
1467 | /* | |
1468 | * The name can be NULL, the netclient name will be type.x. | |
1469 | */ | |
1470 | assert(type != NULL); | |
1471 | ||
1472 | if (n->netclient_name) { | |
1473 | g_free(n->netclient_name); | |
1474 | n->netclient_name = NULL; | |
1475 | } | |
1476 | if (n->netclient_type) { | |
1477 | g_free(n->netclient_type); | |
1478 | n->netclient_type = NULL; | |
1479 | } | |
1480 | ||
1481 | if (name != NULL) { | |
1482 | n->netclient_name = g_strdup(name); | |
1483 | } | |
1484 | n->netclient_type = g_strdup(type); | |
1485 | } | |
1486 | ||
1773d9ee | 1487 | static int virtio_net_device_init(VirtIODevice *vdev) |
17ec5a86 | 1488 | { |
1773d9ee | 1489 | int i; |
fbe78f4f | 1490 | |
1773d9ee FK |
1491 | DeviceState *qdev = DEVICE(vdev); |
1492 | VirtIONet *n = VIRTIO_NET(vdev); | |
b1be4280 | 1493 | NetClientState *nc; |
1773d9ee FK |
1494 | |
1495 | virtio_init(VIRTIO_DEVICE(n), "virtio-net", VIRTIO_ID_NET, | |
1496 | n->config_size); | |
fbe78f4f | 1497 | |
1773d9ee | 1498 | n->max_queues = MAX(n->nic_conf.queues, 1); |
f6b26cf2 | 1499 | n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); |
17a0ca55 | 1500 | n->vqs[0].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); |
fed699f9 JW |
1501 | n->curr_queues = 1; |
1502 | n->vqs[0].n = n; | |
1773d9ee | 1503 | n->tx_timeout = n->net_conf.txtimer; |
a697a334 | 1504 | |
1773d9ee FK |
1505 | if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") |
1506 | && strcmp(n->net_conf.tx, "bh")) { | |
e7b43f7e SH |
1507 | error_report("virtio-net: " |
1508 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
1773d9ee | 1509 | n->net_conf.tx); |
e7b43f7e | 1510 | error_report("Defaulting to \"bh\""); |
a697a334 AW |
1511 | } |
1512 | ||
1773d9ee | 1513 | if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { |
17a0ca55 | 1514 | n->vqs[0].tx_vq = virtio_add_queue(vdev, 256, |
fed699f9 | 1515 | virtio_net_handle_tx_timer); |
bc72ad67 | 1516 | n->vqs[0].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, virtio_net_tx_timer, |
fed699f9 | 1517 | &n->vqs[0]); |
a697a334 | 1518 | } else { |
17a0ca55 | 1519 | n->vqs[0].tx_vq = virtio_add_queue(vdev, 256, |
fed699f9 JW |
1520 | virtio_net_handle_tx_bh); |
1521 | n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); | |
a697a334 | 1522 | } |
17a0ca55 | 1523 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); |
1773d9ee FK |
1524 | qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); |
1525 | memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); | |
554c97dd | 1526 | n->status = VIRTIO_NET_S_LINK_UP; |
fbe78f4f | 1527 | |
8a253ec2 FK |
1528 | if (n->netclient_type) { |
1529 | /* | |
1530 | * Happen when virtio_net_set_netclient_name has been called. | |
1531 | */ | |
1532 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
1533 | n->netclient_type, n->netclient_name, n); | |
1534 | } else { | |
1535 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
1536 | object_get_typename(OBJECT(qdev)), qdev->id, n); | |
1537 | } | |
1538 | ||
6e371ab8 MT |
1539 | peer_test_vnet_hdr(n); |
1540 | if (peer_has_vnet_hdr(n)) { | |
fed699f9 JW |
1541 | for (i = 0; i < n->max_queues; i++) { |
1542 | tap_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); | |
1543 | } | |
6e371ab8 MT |
1544 | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
1545 | } else { | |
1546 | n->host_hdr_len = 0; | |
1547 | } | |
eb6b6c12 | 1548 | |
1773d9ee | 1549 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); |
96d5e201 | 1550 | |
fed699f9 | 1551 | n->vqs[0].tx_waiting = 0; |
1773d9ee | 1552 | n->tx_burst = n->net_conf.txburst; |
ff3a8066 | 1553 | virtio_net_set_mrg_rx_bufs(n, 0); |
002437cd | 1554 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 1555 | |
7267c094 | 1556 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 1557 | |
7267c094 | 1558 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 1559 | |
b1be4280 AK |
1560 | nc = qemu_get_queue(n->nic); |
1561 | nc->rxfilter_notify_enabled = 1; | |
1562 | ||
1773d9ee FK |
1563 | n->qdev = qdev; |
1564 | register_savevm(qdev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, | |
fbe78f4f | 1565 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 1566 | |
1773d9ee | 1567 | add_boot_device_path(n->nic_conf.bootindex, qdev, "/ethernet-phy@0"); |
17ec5a86 FK |
1568 | return 0; |
1569 | } | |
1570 | ||
1571 | static int virtio_net_device_exit(DeviceState *qdev) | |
1572 | { | |
1573 | VirtIONet *n = VIRTIO_NET(qdev); | |
1574 | VirtIODevice *vdev = VIRTIO_DEVICE(qdev); | |
1575 | int i; | |
1576 | ||
1577 | /* This will stop vhost backend if appropriate. */ | |
1578 | virtio_net_set_status(vdev, 0); | |
1579 | ||
1580 | unregister_savevm(qdev, "virtio-net", n); | |
1581 | ||
8a253ec2 FK |
1582 | if (n->netclient_name) { |
1583 | g_free(n->netclient_name); | |
1584 | n->netclient_name = NULL; | |
1585 | } | |
1586 | if (n->netclient_type) { | |
1587 | g_free(n->netclient_type); | |
1588 | n->netclient_type = NULL; | |
1589 | } | |
1590 | ||
17ec5a86 FK |
1591 | g_free(n->mac_table.macs); |
1592 | g_free(n->vlans); | |
1593 | ||
1594 | for (i = 0; i < n->max_queues; i++) { | |
1595 | VirtIONetQueue *q = &n->vqs[i]; | |
1596 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
1597 | ||
1598 | qemu_purge_queued_packets(nc); | |
1599 | ||
1600 | if (q->tx_timer) { | |
bc72ad67 AB |
1601 | timer_del(q->tx_timer); |
1602 | timer_free(q->tx_timer); | |
17ec5a86 FK |
1603 | } else { |
1604 | qemu_bh_delete(q->tx_bh); | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | g_free(n->vqs); | |
1609 | qemu_del_nic(n->nic); | |
6a1a8cc7 | 1610 | virtio_cleanup(vdev); |
17ec5a86 FK |
1611 | |
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | static void virtio_net_instance_init(Object *obj) | |
1616 | { | |
1617 | VirtIONet *n = VIRTIO_NET(obj); | |
1618 | ||
1619 | /* | |
1620 | * The default config_size is sizeof(struct virtio_net_config). | |
1621 | * Can be overriden with virtio_net_set_config_size. | |
1622 | */ | |
1623 | n->config_size = sizeof(struct virtio_net_config); | |
1624 | } | |
1625 | ||
1626 | static Property virtio_net_properties[] = { | |
1627 | DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), | |
1628 | DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, | |
1629 | TX_TIMER_INTERVAL), | |
1630 | DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), | |
1631 | DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), | |
1632 | DEFINE_PROP_END_OF_LIST(), | |
1633 | }; | |
1634 | ||
1635 | static void virtio_net_class_init(ObjectClass *klass, void *data) | |
1636 | { | |
1637 | DeviceClass *dc = DEVICE_CLASS(klass); | |
1638 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
1639 | dc->exit = virtio_net_device_exit; | |
1640 | dc->props = virtio_net_properties; | |
125ee0ed | 1641 | set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
17ec5a86 FK |
1642 | vdc->init = virtio_net_device_init; |
1643 | vdc->get_config = virtio_net_get_config; | |
1644 | vdc->set_config = virtio_net_set_config; | |
1645 | vdc->get_features = virtio_net_get_features; | |
1646 | vdc->set_features = virtio_net_set_features; | |
1647 | vdc->bad_features = virtio_net_bad_features; | |
1648 | vdc->reset = virtio_net_reset; | |
1649 | vdc->set_status = virtio_net_set_status; | |
1650 | vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; | |
1651 | vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; | |
1652 | } | |
1653 | ||
1654 | static const TypeInfo virtio_net_info = { | |
1655 | .name = TYPE_VIRTIO_NET, | |
1656 | .parent = TYPE_VIRTIO_DEVICE, | |
1657 | .instance_size = sizeof(VirtIONet), | |
1658 | .instance_init = virtio_net_instance_init, | |
1659 | .class_init = virtio_net_class_init, | |
1660 | }; | |
1661 | ||
1662 | static void virtio_register_types(void) | |
1663 | { | |
1664 | type_register_static(&virtio_net_info); | |
1665 | } | |
1666 | ||
1667 | type_init(virtio_register_types) |