]>
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 | ||
14 | #include "virtio.h" | |
15 | #include "net.h" | |
16 | #include "qemu-timer.h" | |
17 | #include "virtio-net.h" | |
18 | ||
f21c0ed9 | 19 | #define VIRTIO_NET_VM_VERSION 6 |
b6503ed9 AL |
20 | |
21 | #define MAC_TABLE_ENTRIES 32 | |
f21c0ed9 | 22 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 23 | |
fbe78f4f AL |
24 | typedef struct VirtIONet |
25 | { | |
26 | VirtIODevice vdev; | |
79674068 | 27 | uint8_t mac[ETH_ALEN]; |
554c97dd | 28 | uint16_t status; |
fbe78f4f AL |
29 | VirtQueue *rx_vq; |
30 | VirtQueue *tx_vq; | |
3d11d36c | 31 | VirtQueue *ctrl_vq; |
fbe78f4f AL |
32 | VLANClientState *vc; |
33 | QEMUTimer *tx_timer; | |
34 | int tx_timer_active; | |
35 | int mergeable_rx_bufs; | |
002437cd AL |
36 | int promisc; |
37 | int allmulti; | |
b6503ed9 AL |
38 | struct { |
39 | int in_use; | |
40 | uint8_t *macs; | |
41 | } mac_table; | |
f21c0ed9 | 42 | uint32_t *vlans; |
fbe78f4f AL |
43 | } VirtIONet; |
44 | ||
45 | /* TODO | |
46 | * - we could suppress RX interrupt if we were so inclined. | |
47 | */ | |
48 | ||
49 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
50 | { | |
51 | return (VirtIONet *)vdev; | |
52 | } | |
53 | ||
0f03eca6 | 54 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
55 | { |
56 | VirtIONet *n = to_virtio_net(vdev); | |
57 | struct virtio_net_config netcfg; | |
58 | ||
554c97dd | 59 | netcfg.status = n->status; |
79674068 | 60 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
fbe78f4f AL |
61 | memcpy(config, &netcfg, sizeof(netcfg)); |
62 | } | |
63 | ||
0f03eca6 AL |
64 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
65 | { | |
66 | VirtIONet *n = to_virtio_net(vdev); | |
67 | struct virtio_net_config netcfg; | |
68 | ||
69 | memcpy(&netcfg, config, sizeof(netcfg)); | |
70 | ||
79674068 AL |
71 | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
72 | memcpy(n->mac, netcfg.mac, ETH_ALEN); | |
0f03eca6 AL |
73 | qemu_format_nic_info_str(n->vc, n->mac); |
74 | } | |
75 | } | |
76 | ||
554c97dd AL |
77 | static void virtio_net_set_link_status(VLANClientState *vc) |
78 | { | |
79 | VirtIONet *n = vc->opaque; | |
80 | uint16_t old_status = n->status; | |
81 | ||
82 | if (vc->link_down) | |
83 | n->status &= ~VIRTIO_NET_S_LINK_UP; | |
84 | else | |
85 | n->status |= VIRTIO_NET_S_LINK_UP; | |
86 | ||
87 | if (n->status != old_status) | |
88 | virtio_notify_config(&n->vdev); | |
89 | } | |
90 | ||
002437cd AL |
91 | static void virtio_net_reset(VirtIODevice *vdev) |
92 | { | |
93 | VirtIONet *n = to_virtio_net(vdev); | |
94 | ||
95 | /* Reset back to compatibility mode */ | |
96 | n->promisc = 1; | |
97 | n->allmulti = 0; | |
b6503ed9 | 98 | |
f21c0ed9 | 99 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 AL |
100 | n->mac_table.in_use = 0; |
101 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); | |
f21c0ed9 | 102 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
103 | } |
104 | ||
fbe78f4f AL |
105 | static uint32_t virtio_net_get_features(VirtIODevice *vdev) |
106 | { | |
3d11d36c AL |
107 | uint32_t features = (1 << VIRTIO_NET_F_MAC) | |
108 | (1 << VIRTIO_NET_F_STATUS) | | |
b6503ed9 | 109 | (1 << VIRTIO_NET_F_CTRL_VQ) | |
f21c0ed9 AL |
110 | (1 << VIRTIO_NET_F_CTRL_RX) | |
111 | (1 << VIRTIO_NET_F_CTRL_VLAN); | |
fbe78f4f AL |
112 | |
113 | return features; | |
114 | } | |
115 | ||
116 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) | |
117 | { | |
118 | VirtIONet *n = to_virtio_net(vdev); | |
119 | ||
120 | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)); | |
121 | } | |
122 | ||
002437cd AL |
123 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
124 | VirtQueueElement *elem) | |
125 | { | |
126 | uint8_t on; | |
127 | ||
128 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { | |
129 | fprintf(stderr, "virtio-net ctrl invalid rx mode command\n"); | |
130 | exit(1); | |
131 | } | |
132 | ||
133 | on = ldub_p(elem->out_sg[1].iov_base); | |
134 | ||
135 | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC) | |
136 | n->promisc = on; | |
137 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) | |
138 | n->allmulti = on; | |
139 | else | |
140 | return VIRTIO_NET_ERR; | |
141 | ||
142 | return VIRTIO_NET_OK; | |
143 | } | |
144 | ||
b6503ed9 AL |
145 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
146 | VirtQueueElement *elem) | |
147 | { | |
148 | struct virtio_net_ctrl_mac mac_data; | |
149 | ||
150 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || | |
151 | elem->out_sg[1].iov_len < sizeof(mac_data) || | |
152 | elem->out_sg[2].iov_len < sizeof(mac_data)) | |
153 | return VIRTIO_NET_ERR; | |
154 | ||
155 | n->mac_table.in_use = 0; | |
156 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); | |
157 | ||
158 | mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base); | |
159 | ||
160 | if (sizeof(mac_data.entries) + | |
161 | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len) | |
162 | return VIRTIO_NET_ERR; | |
163 | ||
164 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
165 | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), | |
166 | mac_data.entries * ETH_ALEN); | |
167 | n->mac_table.in_use += mac_data.entries; | |
168 | } else { | |
169 | n->promisc = 1; | |
170 | return VIRTIO_NET_OK; | |
171 | } | |
172 | ||
173 | mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base); | |
174 | ||
175 | if (sizeof(mac_data.entries) + | |
176 | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len) | |
177 | return VIRTIO_NET_ERR; | |
178 | ||
179 | if (mac_data.entries) { | |
180 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { | |
181 | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), | |
182 | elem->out_sg[2].iov_base + sizeof(mac_data), | |
183 | mac_data.entries * ETH_ALEN); | |
184 | n->mac_table.in_use += mac_data.entries; | |
185 | } else | |
186 | n->allmulti = 1; | |
187 | } | |
188 | ||
189 | return VIRTIO_NET_OK; | |
190 | } | |
191 | ||
f21c0ed9 AL |
192 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
193 | VirtQueueElement *elem) | |
194 | { | |
195 | uint16_t vid; | |
196 | ||
197 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { | |
198 | fprintf(stderr, "virtio-net ctrl invalid vlan command\n"); | |
199 | return VIRTIO_NET_ERR; | |
200 | } | |
201 | ||
202 | vid = lduw_le_p(elem->out_sg[1].iov_base); | |
203 | ||
204 | if (vid >= MAX_VLAN) | |
205 | return VIRTIO_NET_ERR; | |
206 | ||
207 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
208 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
209 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
210 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
211 | else | |
212 | return VIRTIO_NET_ERR; | |
213 | ||
214 | return VIRTIO_NET_OK; | |
215 | } | |
216 | ||
3d11d36c AL |
217 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
218 | { | |
002437cd | 219 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
220 | struct virtio_net_ctrl_hdr ctrl; |
221 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
222 | VirtQueueElement elem; | |
223 | ||
224 | while (virtqueue_pop(vq, &elem)) { | |
225 | if ((elem.in_num < 1) || (elem.out_num < 1)) { | |
226 | fprintf(stderr, "virtio-net ctrl missing headers\n"); | |
227 | exit(1); | |
228 | } | |
229 | ||
230 | if (elem.out_sg[0].iov_len < sizeof(ctrl) || | |
231 | elem.out_sg[elem.in_num - 1].iov_len < sizeof(status)) { | |
232 | fprintf(stderr, "virtio-net ctrl header not in correct element\n"); | |
233 | exit(1); | |
234 | } | |
235 | ||
236 | ctrl.class = ldub_p(elem.out_sg[0].iov_base); | |
237 | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); | |
238 | ||
002437cd AL |
239 | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE) |
240 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); | |
b6503ed9 AL |
241 | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
242 | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); | |
f21c0ed9 AL |
243 | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
244 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); | |
002437cd | 245 | |
3d11d36c AL |
246 | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status); |
247 | ||
248 | virtqueue_push(vq, &elem, sizeof(status)); | |
249 | virtio_notify(vdev, vq); | |
250 | } | |
251 | } | |
252 | ||
fbe78f4f AL |
253 | /* RX */ |
254 | ||
255 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
256 | { | |
257 | } | |
258 | ||
259 | static int do_virtio_net_can_receive(VirtIONet *n, int bufsize) | |
260 | { | |
261 | if (!virtio_queue_ready(n->rx_vq) || | |
262 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
263 | return 0; | |
264 | ||
265 | if (virtio_queue_empty(n->rx_vq) || | |
266 | (n->mergeable_rx_bufs && | |
267 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) { | |
268 | virtio_queue_set_notification(n->rx_vq, 1); | |
269 | return 0; | |
270 | } | |
271 | ||
272 | virtio_queue_set_notification(n->rx_vq, 0); | |
273 | return 1; | |
274 | } | |
275 | ||
276 | static int virtio_net_can_receive(void *opaque) | |
277 | { | |
278 | VirtIONet *n = opaque; | |
279 | ||
280 | return do_virtio_net_can_receive(n, VIRTIO_NET_MAX_BUFSIZE); | |
281 | } | |
282 | ||
283 | static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count) | |
284 | { | |
285 | int offset, i; | |
286 | ||
287 | offset = i = 0; | |
288 | while (offset < count && i < iovcnt) { | |
289 | int len = MIN(iov[i].iov_len, count - offset); | |
290 | memcpy(iov[i].iov_base, buf + offset, len); | |
291 | offset += len; | |
292 | i++; | |
293 | } | |
294 | ||
295 | return offset; | |
296 | } | |
297 | ||
298 | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, | |
4689f4b3 | 299 | const void *buf, size_t size, size_t hdr_len) |
fbe78f4f AL |
300 | { |
301 | struct virtio_net_hdr *hdr = iov[0].iov_base; | |
302 | int offset = 0; | |
303 | ||
304 | hdr->flags = 0; | |
305 | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
306 | ||
307 | /* We only ever receive a struct virtio_net_hdr from the tapfd, | |
308 | * but we may be passing along a larger header to the guest. | |
309 | */ | |
310 | iov[0].iov_base += hdr_len; | |
311 | iov[0].iov_len -= hdr_len; | |
312 | ||
313 | return offset; | |
314 | } | |
315 | ||
3831ab20 AL |
316 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
317 | { | |
318 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 319 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 320 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 321 | int i; |
3831ab20 AL |
322 | |
323 | if (n->promisc) | |
324 | return 1; | |
325 | ||
326 | #ifdef TAP_VNET_HDR | |
327 | if (tap_has_vnet_hdr(n->vc->vlan->first_client)) | |
328 | ptr += sizeof(struct virtio_net_hdr); | |
329 | #endif | |
330 | ||
f21c0ed9 AL |
331 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
332 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
333 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
334 | return 0; | |
335 | } | |
336 | ||
3831ab20 AL |
337 | if ((ptr[0] & 1) && n->allmulti) |
338 | return 1; | |
339 | ||
340 | if (!memcmp(ptr, bcast, sizeof(bcast))) | |
341 | return 1; | |
342 | ||
343 | if (!memcmp(ptr, n->mac, ETH_ALEN)) | |
344 | return 1; | |
345 | ||
b6503ed9 AL |
346 | for (i = 0; i < n->mac_table.in_use; i++) { |
347 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) | |
348 | return 1; | |
349 | } | |
350 | ||
3831ab20 AL |
351 | return 0; |
352 | } | |
353 | ||
fbe78f4f AL |
354 | static void virtio_net_receive(void *opaque, const uint8_t *buf, int size) |
355 | { | |
356 | VirtIONet *n = opaque; | |
357 | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; | |
4689f4b3 | 358 | size_t hdr_len, offset, i; |
fbe78f4f AL |
359 | |
360 | if (!do_virtio_net_can_receive(n, size)) | |
361 | return; | |
362 | ||
3831ab20 AL |
363 | if (!receive_filter(n, buf, size)) |
364 | return; | |
365 | ||
fbe78f4f AL |
366 | /* hdr_len refers to the header we supply to the guest */ |
367 | hdr_len = n->mergeable_rx_bufs ? | |
368 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
369 | ||
370 | offset = i = 0; | |
371 | ||
372 | while (offset < size) { | |
373 | VirtQueueElement elem; | |
374 | int len, total; | |
375 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; | |
376 | ||
377 | len = total = 0; | |
378 | ||
379 | if ((i != 0 && !n->mergeable_rx_bufs) || | |
380 | virtqueue_pop(n->rx_vq, &elem) == 0) { | |
381 | if (i == 0) | |
382 | return; | |
383 | fprintf(stderr, "virtio-net truncating packet\n"); | |
384 | exit(1); | |
385 | } | |
386 | ||
387 | if (elem.in_num < 1) { | |
388 | fprintf(stderr, "virtio-net receive queue contains no in buffers\n"); | |
389 | exit(1); | |
390 | } | |
391 | ||
392 | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { | |
393 | fprintf(stderr, "virtio-net header not in first element\n"); | |
394 | exit(1); | |
395 | } | |
396 | ||
397 | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); | |
398 | ||
399 | if (i == 0) { | |
400 | if (n->mergeable_rx_bufs) | |
401 | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; | |
402 | ||
403 | offset += receive_header(n, sg, elem.in_num, | |
404 | buf + offset, size - offset, hdr_len); | |
405 | total += hdr_len; | |
406 | } | |
407 | ||
408 | /* copy in packet. ugh */ | |
409 | len = iov_fill(sg, elem.in_num, | |
410 | buf + offset, size - offset); | |
411 | total += len; | |
412 | ||
413 | /* signal other side */ | |
414 | virtqueue_fill(n->rx_vq, &elem, total, i++); | |
415 | ||
416 | offset += len; | |
417 | } | |
418 | ||
419 | if (mhdr) | |
420 | mhdr->num_buffers = i; | |
421 | ||
422 | virtqueue_flush(n->rx_vq, i); | |
423 | virtio_notify(&n->vdev, n->rx_vq); | |
424 | } | |
425 | ||
426 | /* TX */ | |
427 | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) | |
428 | { | |
429 | VirtQueueElement elem; | |
430 | int has_vnet_hdr = 0; | |
431 | ||
432 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
433 | return; | |
434 | ||
435 | while (virtqueue_pop(vq, &elem)) { | |
436 | ssize_t len = 0; | |
437 | unsigned int out_num = elem.out_num; | |
438 | struct iovec *out_sg = &elem.out_sg[0]; | |
439 | unsigned hdr_len; | |
440 | ||
441 | /* hdr_len refers to the header received from the guest */ | |
442 | hdr_len = n->mergeable_rx_bufs ? | |
443 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : | |
444 | sizeof(struct virtio_net_hdr); | |
445 | ||
446 | if (out_num < 1 || out_sg->iov_len != hdr_len) { | |
447 | fprintf(stderr, "virtio-net header not in first element\n"); | |
448 | exit(1); | |
449 | } | |
450 | ||
451 | /* ignore the header if GSO is not supported */ | |
452 | if (!has_vnet_hdr) { | |
453 | out_num--; | |
454 | out_sg++; | |
455 | len += hdr_len; | |
456 | } else if (n->mergeable_rx_bufs) { | |
457 | /* tapfd expects a struct virtio_net_hdr */ | |
458 | hdr_len -= sizeof(struct virtio_net_hdr); | |
459 | out_sg->iov_len -= hdr_len; | |
460 | len += hdr_len; | |
461 | } | |
462 | ||
463 | len += qemu_sendv_packet(n->vc, out_sg, out_num); | |
464 | ||
465 | virtqueue_push(vq, &elem, len); | |
466 | virtio_notify(&n->vdev, vq); | |
467 | } | |
468 | } | |
469 | ||
470 | static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) | |
471 | { | |
472 | VirtIONet *n = to_virtio_net(vdev); | |
473 | ||
474 | if (n->tx_timer_active) { | |
475 | virtio_queue_set_notification(vq, 1); | |
476 | qemu_del_timer(n->tx_timer); | |
477 | n->tx_timer_active = 0; | |
478 | virtio_net_flush_tx(n, vq); | |
479 | } else { | |
480 | qemu_mod_timer(n->tx_timer, | |
481 | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); | |
482 | n->tx_timer_active = 1; | |
483 | virtio_queue_set_notification(vq, 0); | |
484 | } | |
485 | } | |
486 | ||
487 | static void virtio_net_tx_timer(void *opaque) | |
488 | { | |
489 | VirtIONet *n = opaque; | |
490 | ||
491 | n->tx_timer_active = 0; | |
492 | ||
493 | /* Just in case the driver is not ready on more */ | |
494 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
495 | return; | |
496 | ||
497 | virtio_queue_set_notification(n->tx_vq, 1); | |
498 | virtio_net_flush_tx(n, n->tx_vq); | |
499 | } | |
500 | ||
501 | static void virtio_net_save(QEMUFile *f, void *opaque) | |
502 | { | |
503 | VirtIONet *n = opaque; | |
504 | ||
505 | virtio_save(&n->vdev, f); | |
506 | ||
79674068 | 507 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
fbe78f4f | 508 | qemu_put_be32(f, n->tx_timer_active); |
e46cb38f | 509 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 510 | qemu_put_be16(f, n->status); |
002437cd AL |
511 | qemu_put_be32(f, n->promisc); |
512 | qemu_put_be32(f, n->allmulti); | |
b6503ed9 AL |
513 | qemu_put_be32(f, n->mac_table.in_use); |
514 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 515 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
fbe78f4f AL |
516 | } |
517 | ||
518 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
519 | { | |
520 | VirtIONet *n = opaque; | |
521 | ||
9d6271b8 | 522 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
523 | return -EINVAL; |
524 | ||
525 | virtio_load(&n->vdev, f); | |
526 | ||
79674068 | 527 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
fbe78f4f | 528 | n->tx_timer_active = qemu_get_be32(f); |
e46cb38f | 529 | n->mergeable_rx_bufs = qemu_get_be32(f); |
fbe78f4f | 530 | |
9d6271b8 AL |
531 | if (version_id >= 3) |
532 | n->status = qemu_get_be16(f); | |
533 | ||
002437cd AL |
534 | if (version_id >= 4) { |
535 | n->promisc = qemu_get_be32(f); | |
536 | n->allmulti = qemu_get_be32(f); | |
537 | } | |
538 | ||
b6503ed9 AL |
539 | if (version_id >= 5) { |
540 | n->mac_table.in_use = qemu_get_be32(f); | |
541 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
542 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
543 | qemu_get_buffer(f, n->mac_table.macs, | |
544 | n->mac_table.in_use * ETH_ALEN); | |
545 | } else if (n->mac_table.in_use) { | |
546 | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); | |
547 | n->promisc = 1; | |
548 | n->mac_table.in_use = 0; | |
549 | } | |
550 | } | |
551 | ||
f21c0ed9 AL |
552 | if (version_id >= 6) |
553 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
554 | ||
fbe78f4f AL |
555 | if (n->tx_timer_active) { |
556 | qemu_mod_timer(n->tx_timer, | |
557 | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); | |
558 | } | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
72da4208 | 563 | PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn) |
fbe78f4f AL |
564 | { |
565 | VirtIONet *n; | |
566 | static int virtio_net_id; | |
567 | ||
a7c4996b AL |
568 | n = (VirtIONet *)virtio_init_pci(bus, "virtio-net", |
569 | PCI_VENDOR_ID_REDHAT_QUMRANET, | |
570 | PCI_DEVICE_ID_VIRTIO_NET, | |
99b3718e AL |
571 | PCI_VENDOR_ID_REDHAT_QUMRANET, |
572 | VIRTIO_ID_NET, | |
173a543b | 573 | PCI_CLASS_NETWORK_ETHERNET, 0x00, |
554c97dd AL |
574 | sizeof(struct virtio_net_config), |
575 | sizeof(VirtIONet)); | |
fbe78f4f | 576 | if (!n) |
72da4208 | 577 | return NULL; |
fbe78f4f | 578 | |
0f03eca6 AL |
579 | n->vdev.get_config = virtio_net_get_config; |
580 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
581 | n->vdev.get_features = virtio_net_get_features; |
582 | n->vdev.set_features = virtio_net_set_features; | |
002437cd | 583 | n->vdev.reset = virtio_net_reset; |
fbe78f4f AL |
584 | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
585 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx); | |
3d11d36c | 586 | n->ctrl_vq = virtio_add_queue(&n->vdev, 16, virtio_net_handle_ctrl); |
79674068 | 587 | memcpy(n->mac, nd->macaddr, ETH_ALEN); |
554c97dd | 588 | n->status = VIRTIO_NET_S_LINK_UP; |
7a9f6e4a | 589 | n->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name, |
bf38c1a0 | 590 | virtio_net_receive, virtio_net_can_receive, n); |
554c97dd | 591 | n->vc->link_status_changed = virtio_net_set_link_status; |
fbe78f4f | 592 | |
96d5e201 AL |
593 | qemu_format_nic_info_str(n->vc, n->mac); |
594 | ||
fbe78f4f AL |
595 | n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
596 | n->tx_timer_active = 0; | |
597 | n->mergeable_rx_bufs = 0; | |
002437cd | 598 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 599 | |
b6503ed9 | 600 | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 601 | |
f21c0ed9 | 602 | n->vlans = qemu_mallocz(MAX_VLAN >> 3); |
f21c0ed9 | 603 | |
9d6271b8 | 604 | register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION, |
fbe78f4f | 605 | virtio_net_save, virtio_net_load, n); |
72da4208 | 606 | return (PCIDevice *)n; |
fbe78f4f | 607 | } |