]>
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 | ||
015cb166 | 19 | #define VIRTIO_NET_VM_VERSION 10 |
b6503ed9 | 20 | |
4ffb17f5 | 21 | #define MAC_TABLE_ENTRIES 64 |
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; | |
6243375f MM |
35 | struct { |
36 | VirtQueueElement elem; | |
37 | ssize_t len; | |
38 | } async_tx; | |
fbe78f4f | 39 | int mergeable_rx_bufs; |
f10c592e AW |
40 | uint8_t promisc; |
41 | uint8_t allmulti; | |
015cb166 AW |
42 | uint8_t alluni; |
43 | uint8_t nomulti; | |
44 | uint8_t nouni; | |
45 | uint8_t nobcast; | |
b6503ed9 AL |
46 | struct { |
47 | int in_use; | |
2d9aba39 | 48 | int first_multi; |
8fd2a2f1 AW |
49 | uint8_t multi_overflow; |
50 | uint8_t uni_overflow; | |
b6503ed9 AL |
51 | uint8_t *macs; |
52 | } mac_table; | |
f21c0ed9 | 53 | uint32_t *vlans; |
fbe78f4f AL |
54 | } VirtIONet; |
55 | ||
56 | /* TODO | |
57 | * - we could suppress RX interrupt if we were so inclined. | |
58 | */ | |
59 | ||
60 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
61 | { | |
62 | return (VirtIONet *)vdev; | |
63 | } | |
64 | ||
0f03eca6 | 65 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
66 | { |
67 | VirtIONet *n = to_virtio_net(vdev); | |
68 | struct virtio_net_config netcfg; | |
69 | ||
554c97dd | 70 | netcfg.status = n->status; |
79674068 | 71 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
fbe78f4f AL |
72 | memcpy(config, &netcfg, sizeof(netcfg)); |
73 | } | |
74 | ||
0f03eca6 AL |
75 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
76 | { | |
77 | VirtIONet *n = to_virtio_net(vdev); | |
78 | struct virtio_net_config netcfg; | |
79 | ||
80 | memcpy(&netcfg, config, sizeof(netcfg)); | |
81 | ||
79674068 AL |
82 | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
83 | memcpy(n->mac, netcfg.mac, ETH_ALEN); | |
0f03eca6 AL |
84 | qemu_format_nic_info_str(n->vc, n->mac); |
85 | } | |
86 | } | |
87 | ||
554c97dd AL |
88 | static void virtio_net_set_link_status(VLANClientState *vc) |
89 | { | |
90 | VirtIONet *n = vc->opaque; | |
91 | uint16_t old_status = n->status; | |
92 | ||
93 | if (vc->link_down) | |
94 | n->status &= ~VIRTIO_NET_S_LINK_UP; | |
95 | else | |
96 | n->status |= VIRTIO_NET_S_LINK_UP; | |
97 | ||
98 | if (n->status != old_status) | |
99 | virtio_notify_config(&n->vdev); | |
100 | } | |
101 | ||
002437cd AL |
102 | static void virtio_net_reset(VirtIODevice *vdev) |
103 | { | |
104 | VirtIONet *n = to_virtio_net(vdev); | |
105 | ||
106 | /* Reset back to compatibility mode */ | |
107 | n->promisc = 1; | |
108 | n->allmulti = 0; | |
015cb166 AW |
109 | n->alluni = 0; |
110 | n->nomulti = 0; | |
111 | n->nouni = 0; | |
112 | n->nobcast = 0; | |
b6503ed9 | 113 | |
f21c0ed9 | 114 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 115 | n->mac_table.in_use = 0; |
2d9aba39 | 116 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
117 | n->mac_table.multi_overflow = 0; |
118 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 119 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
f21c0ed9 | 120 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
121 | } |
122 | ||
fbe78f4f AL |
123 | static uint32_t virtio_net_get_features(VirtIODevice *vdev) |
124 | { | |
3d11d36c | 125 | uint32_t features = (1 << VIRTIO_NET_F_MAC) | |
e16044ef | 126 | (1 << VIRTIO_NET_F_MRG_RXBUF) | |
3d11d36c | 127 | (1 << VIRTIO_NET_F_STATUS) | |
b6503ed9 | 128 | (1 << VIRTIO_NET_F_CTRL_VQ) | |
f21c0ed9 | 129 | (1 << VIRTIO_NET_F_CTRL_RX) | |
015cb166 AW |
130 | (1 << VIRTIO_NET_F_CTRL_VLAN) | |
131 | (1 << VIRTIO_NET_F_CTRL_RX_EXTRA); | |
fbe78f4f AL |
132 | |
133 | return features; | |
134 | } | |
135 | ||
8eca6b1b AL |
136 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
137 | { | |
138 | uint32_t features = 0; | |
139 | ||
140 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
141 | * but also these: */ | |
142 | features |= (1 << VIRTIO_NET_F_MAC); | |
143 | features |= (1 << VIRTIO_NET_F_GUEST_CSUM); | |
144 | features |= (1 << VIRTIO_NET_F_GUEST_TSO4); | |
145 | features |= (1 << VIRTIO_NET_F_GUEST_TSO6); | |
146 | features |= (1 << VIRTIO_NET_F_GUEST_ECN); | |
147 | ||
148 | return features & virtio_net_get_features(vdev); | |
149 | } | |
150 | ||
fbe78f4f AL |
151 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
152 | { | |
153 | VirtIONet *n = to_virtio_net(vdev); | |
154 | ||
155 | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)); | |
156 | } | |
157 | ||
002437cd AL |
158 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
159 | VirtQueueElement *elem) | |
160 | { | |
161 | uint8_t on; | |
162 | ||
163 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { | |
164 | fprintf(stderr, "virtio-net ctrl invalid rx mode command\n"); | |
165 | exit(1); | |
166 | } | |
167 | ||
168 | on = ldub_p(elem->out_sg[1].iov_base); | |
169 | ||
170 | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC) | |
171 | n->promisc = on; | |
172 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) | |
173 | n->allmulti = on; | |
015cb166 AW |
174 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
175 | n->alluni = on; | |
176 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) | |
177 | n->nomulti = on; | |
178 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) | |
179 | n->nouni = on; | |
180 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) | |
181 | n->nobcast = on; | |
002437cd AL |
182 | else |
183 | return VIRTIO_NET_ERR; | |
184 | ||
185 | return VIRTIO_NET_OK; | |
186 | } | |
187 | ||
b6503ed9 AL |
188 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
189 | VirtQueueElement *elem) | |
190 | { | |
191 | struct virtio_net_ctrl_mac mac_data; | |
192 | ||
193 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || | |
194 | elem->out_sg[1].iov_len < sizeof(mac_data) || | |
195 | elem->out_sg[2].iov_len < sizeof(mac_data)) | |
196 | return VIRTIO_NET_ERR; | |
197 | ||
198 | n->mac_table.in_use = 0; | |
2d9aba39 | 199 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
200 | n->mac_table.uni_overflow = 0; |
201 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
202 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
203 | ||
204 | mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base); | |
205 | ||
206 | if (sizeof(mac_data.entries) + | |
207 | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len) | |
208 | return VIRTIO_NET_ERR; | |
209 | ||
210 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
211 | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), | |
212 | mac_data.entries * ETH_ALEN); | |
213 | n->mac_table.in_use += mac_data.entries; | |
214 | } else { | |
8fd2a2f1 | 215 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
216 | } |
217 | ||
2d9aba39 AW |
218 | n->mac_table.first_multi = n->mac_table.in_use; |
219 | ||
b6503ed9 AL |
220 | mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base); |
221 | ||
222 | if (sizeof(mac_data.entries) + | |
223 | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len) | |
224 | return VIRTIO_NET_ERR; | |
225 | ||
226 | if (mac_data.entries) { | |
227 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { | |
228 | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), | |
229 | elem->out_sg[2].iov_base + sizeof(mac_data), | |
230 | mac_data.entries * ETH_ALEN); | |
231 | n->mac_table.in_use += mac_data.entries; | |
8fd2a2f1 AW |
232 | } else { |
233 | n->mac_table.multi_overflow = 1; | |
234 | } | |
b6503ed9 AL |
235 | } |
236 | ||
237 | return VIRTIO_NET_OK; | |
238 | } | |
239 | ||
f21c0ed9 AL |
240 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
241 | VirtQueueElement *elem) | |
242 | { | |
243 | uint16_t vid; | |
244 | ||
245 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { | |
246 | fprintf(stderr, "virtio-net ctrl invalid vlan command\n"); | |
247 | return VIRTIO_NET_ERR; | |
248 | } | |
249 | ||
250 | vid = lduw_le_p(elem->out_sg[1].iov_base); | |
251 | ||
252 | if (vid >= MAX_VLAN) | |
253 | return VIRTIO_NET_ERR; | |
254 | ||
255 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
256 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
257 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
258 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
259 | else | |
260 | return VIRTIO_NET_ERR; | |
261 | ||
262 | return VIRTIO_NET_OK; | |
263 | } | |
264 | ||
3d11d36c AL |
265 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
266 | { | |
002437cd | 267 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
268 | struct virtio_net_ctrl_hdr ctrl; |
269 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
270 | VirtQueueElement elem; | |
271 | ||
272 | while (virtqueue_pop(vq, &elem)) { | |
273 | if ((elem.in_num < 1) || (elem.out_num < 1)) { | |
274 | fprintf(stderr, "virtio-net ctrl missing headers\n"); | |
275 | exit(1); | |
276 | } | |
277 | ||
278 | if (elem.out_sg[0].iov_len < sizeof(ctrl) || | |
c6bb9a32 | 279 | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
3d11d36c AL |
280 | fprintf(stderr, "virtio-net ctrl header not in correct element\n"); |
281 | exit(1); | |
282 | } | |
283 | ||
284 | ctrl.class = ldub_p(elem.out_sg[0].iov_base); | |
285 | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); | |
286 | ||
002437cd AL |
287 | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE) |
288 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); | |
b6503ed9 AL |
289 | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
290 | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); | |
f21c0ed9 AL |
291 | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
292 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); | |
002437cd | 293 | |
3d11d36c AL |
294 | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status); |
295 | ||
296 | virtqueue_push(vq, &elem, sizeof(status)); | |
297 | virtio_notify(vdev, vq); | |
298 | } | |
299 | } | |
300 | ||
fbe78f4f AL |
301 | /* RX */ |
302 | ||
303 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
304 | { | |
8aeff62d MM |
305 | VirtIONet *n = to_virtio_net(vdev); |
306 | ||
307 | qemu_flush_queued_packets(n->vc); | |
fbe78f4f AL |
308 | } |
309 | ||
310 | static int do_virtio_net_can_receive(VirtIONet *n, int bufsize) | |
311 | { | |
312 | if (!virtio_queue_ready(n->rx_vq) || | |
313 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
314 | return 0; | |
315 | ||
316 | if (virtio_queue_empty(n->rx_vq) || | |
317 | (n->mergeable_rx_bufs && | |
318 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) { | |
319 | virtio_queue_set_notification(n->rx_vq, 1); | |
320 | return 0; | |
321 | } | |
322 | ||
323 | virtio_queue_set_notification(n->rx_vq, 0); | |
324 | return 1; | |
325 | } | |
326 | ||
e3f5ec2b | 327 | static int virtio_net_can_receive(VLANClientState *vc) |
fbe78f4f | 328 | { |
e3f5ec2b | 329 | VirtIONet *n = vc->opaque; |
fbe78f4f AL |
330 | |
331 | return do_virtio_net_can_receive(n, VIRTIO_NET_MAX_BUFSIZE); | |
332 | } | |
333 | ||
334 | static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count) | |
335 | { | |
336 | int offset, i; | |
337 | ||
338 | offset = i = 0; | |
339 | while (offset < count && i < iovcnt) { | |
340 | int len = MIN(iov[i].iov_len, count - offset); | |
341 | memcpy(iov[i].iov_base, buf + offset, len); | |
342 | offset += len; | |
343 | i++; | |
344 | } | |
345 | ||
346 | return offset; | |
347 | } | |
348 | ||
349 | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, | |
4689f4b3 | 350 | const void *buf, size_t size, size_t hdr_len) |
fbe78f4f | 351 | { |
3f4cb3d3 | 352 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
fbe78f4f AL |
353 | int offset = 0; |
354 | ||
355 | hdr->flags = 0; | |
356 | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
357 | ||
358 | /* We only ever receive a struct virtio_net_hdr from the tapfd, | |
359 | * but we may be passing along a larger header to the guest. | |
360 | */ | |
361 | iov[0].iov_base += hdr_len; | |
362 | iov[0].iov_len -= hdr_len; | |
363 | ||
364 | return offset; | |
365 | } | |
366 | ||
3831ab20 AL |
367 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
368 | { | |
369 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 370 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 371 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 372 | int i; |
3831ab20 AL |
373 | |
374 | if (n->promisc) | |
375 | return 1; | |
376 | ||
f21c0ed9 AL |
377 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
378 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
379 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
380 | return 0; | |
381 | } | |
382 | ||
bbe2f399 AW |
383 | if (ptr[0] & 1) { // multicast |
384 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
385 | return !n->nobcast; |
386 | } else if (n->nomulti) { | |
387 | return 0; | |
8fd2a2f1 | 388 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
389 | return 1; |
390 | } | |
2d9aba39 AW |
391 | |
392 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
393 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
394 | return 1; | |
395 | } | |
396 | } | |
bbe2f399 | 397 | } else { // unicast |
015cb166 AW |
398 | if (n->nouni) { |
399 | return 0; | |
400 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
401 | return 1; |
402 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
403 | return 1; |
404 | } | |
3831ab20 | 405 | |
2d9aba39 AW |
406 | for (i = 0; i < n->mac_table.first_multi; i++) { |
407 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
408 | return 1; | |
409 | } | |
410 | } | |
b6503ed9 AL |
411 | } |
412 | ||
3831ab20 AL |
413 | return 0; |
414 | } | |
415 | ||
4f1c942b | 416 | static ssize_t virtio_net_receive(VLANClientState *vc, const uint8_t *buf, size_t size) |
fbe78f4f | 417 | { |
e3f5ec2b | 418 | VirtIONet *n = vc->opaque; |
fbe78f4f | 419 | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
4689f4b3 | 420 | size_t hdr_len, offset, i; |
fbe78f4f AL |
421 | |
422 | if (!do_virtio_net_can_receive(n, size)) | |
8aeff62d | 423 | return 0; |
fbe78f4f | 424 | |
3831ab20 | 425 | if (!receive_filter(n, buf, size)) |
4f1c942b | 426 | return size; |
3831ab20 | 427 | |
fbe78f4f AL |
428 | /* hdr_len refers to the header we supply to the guest */ |
429 | hdr_len = n->mergeable_rx_bufs ? | |
430 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
431 | ||
432 | offset = i = 0; | |
433 | ||
434 | while (offset < size) { | |
435 | VirtQueueElement elem; | |
436 | int len, total; | |
437 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; | |
438 | ||
439 | len = total = 0; | |
440 | ||
441 | if ((i != 0 && !n->mergeable_rx_bufs) || | |
442 | virtqueue_pop(n->rx_vq, &elem) == 0) { | |
443 | if (i == 0) | |
4f1c942b | 444 | return -1; |
fbe78f4f AL |
445 | fprintf(stderr, "virtio-net truncating packet\n"); |
446 | exit(1); | |
447 | } | |
448 | ||
449 | if (elem.in_num < 1) { | |
450 | fprintf(stderr, "virtio-net receive queue contains no in buffers\n"); | |
451 | exit(1); | |
452 | } | |
453 | ||
454 | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { | |
455 | fprintf(stderr, "virtio-net header not in first element\n"); | |
456 | exit(1); | |
457 | } | |
458 | ||
459 | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); | |
460 | ||
461 | if (i == 0) { | |
462 | if (n->mergeable_rx_bufs) | |
463 | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; | |
464 | ||
465 | offset += receive_header(n, sg, elem.in_num, | |
466 | buf + offset, size - offset, hdr_len); | |
467 | total += hdr_len; | |
468 | } | |
469 | ||
470 | /* copy in packet. ugh */ | |
471 | len = iov_fill(sg, elem.in_num, | |
472 | buf + offset, size - offset); | |
473 | total += len; | |
474 | ||
475 | /* signal other side */ | |
476 | virtqueue_fill(n->rx_vq, &elem, total, i++); | |
477 | ||
478 | offset += len; | |
479 | } | |
480 | ||
481 | if (mhdr) | |
482 | mhdr->num_buffers = i; | |
483 | ||
484 | virtqueue_flush(n->rx_vq, i); | |
485 | virtio_notify(&n->vdev, n->rx_vq); | |
4f1c942b MM |
486 | |
487 | return size; | |
fbe78f4f AL |
488 | } |
489 | ||
6243375f MM |
490 | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
491 | ||
492 | static void virtio_net_tx_complete(VLANClientState *vc, ssize_t len) | |
493 | { | |
494 | VirtIONet *n = vc->opaque; | |
495 | ||
496 | virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); | |
497 | virtio_notify(&n->vdev, n->tx_vq); | |
498 | ||
499 | n->async_tx.elem.out_num = n->async_tx.len = 0; | |
500 | ||
501 | virtio_queue_set_notification(n->tx_vq, 1); | |
502 | virtio_net_flush_tx(n, n->tx_vq); | |
503 | } | |
504 | ||
fbe78f4f AL |
505 | /* TX */ |
506 | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) | |
507 | { | |
508 | VirtQueueElement elem; | |
509 | int has_vnet_hdr = 0; | |
510 | ||
511 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
512 | return; | |
513 | ||
6243375f MM |
514 | if (n->async_tx.elem.out_num) { |
515 | virtio_queue_set_notification(n->tx_vq, 0); | |
516 | return; | |
517 | } | |
518 | ||
fbe78f4f | 519 | while (virtqueue_pop(vq, &elem)) { |
6243375f | 520 | ssize_t ret, len = 0; |
fbe78f4f AL |
521 | unsigned int out_num = elem.out_num; |
522 | struct iovec *out_sg = &elem.out_sg[0]; | |
523 | unsigned hdr_len; | |
524 | ||
525 | /* hdr_len refers to the header received from the guest */ | |
526 | hdr_len = n->mergeable_rx_bufs ? | |
527 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : | |
528 | sizeof(struct virtio_net_hdr); | |
529 | ||
530 | if (out_num < 1 || out_sg->iov_len != hdr_len) { | |
531 | fprintf(stderr, "virtio-net header not in first element\n"); | |
532 | exit(1); | |
533 | } | |
534 | ||
535 | /* ignore the header if GSO is not supported */ | |
536 | if (!has_vnet_hdr) { | |
537 | out_num--; | |
538 | out_sg++; | |
539 | len += hdr_len; | |
540 | } else if (n->mergeable_rx_bufs) { | |
541 | /* tapfd expects a struct virtio_net_hdr */ | |
542 | hdr_len -= sizeof(struct virtio_net_hdr); | |
543 | out_sg->iov_len -= hdr_len; | |
544 | len += hdr_len; | |
545 | } | |
546 | ||
6243375f MM |
547 | ret = qemu_sendv_packet_async(n->vc, out_sg, out_num, |
548 | virtio_net_tx_complete); | |
549 | if (ret == 0) { | |
550 | virtio_queue_set_notification(n->tx_vq, 0); | |
551 | n->async_tx.elem = elem; | |
552 | n->async_tx.len = len; | |
553 | return; | |
554 | } | |
555 | ||
556 | len += ret; | |
fbe78f4f AL |
557 | |
558 | virtqueue_push(vq, &elem, len); | |
559 | virtio_notify(&n->vdev, vq); | |
560 | } | |
561 | } | |
562 | ||
563 | static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) | |
564 | { | |
565 | VirtIONet *n = to_virtio_net(vdev); | |
566 | ||
567 | if (n->tx_timer_active) { | |
568 | virtio_queue_set_notification(vq, 1); | |
569 | qemu_del_timer(n->tx_timer); | |
570 | n->tx_timer_active = 0; | |
571 | virtio_net_flush_tx(n, vq); | |
572 | } else { | |
573 | qemu_mod_timer(n->tx_timer, | |
574 | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); | |
575 | n->tx_timer_active = 1; | |
576 | virtio_queue_set_notification(vq, 0); | |
577 | } | |
578 | } | |
579 | ||
580 | static void virtio_net_tx_timer(void *opaque) | |
581 | { | |
582 | VirtIONet *n = opaque; | |
583 | ||
584 | n->tx_timer_active = 0; | |
585 | ||
586 | /* Just in case the driver is not ready on more */ | |
587 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
588 | return; | |
589 | ||
590 | virtio_queue_set_notification(n->tx_vq, 1); | |
591 | virtio_net_flush_tx(n, n->tx_vq); | |
592 | } | |
593 | ||
594 | static void virtio_net_save(QEMUFile *f, void *opaque) | |
595 | { | |
596 | VirtIONet *n = opaque; | |
597 | ||
598 | virtio_save(&n->vdev, f); | |
599 | ||
79674068 | 600 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
fbe78f4f | 601 | qemu_put_be32(f, n->tx_timer_active); |
e46cb38f | 602 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 603 | qemu_put_be16(f, n->status); |
f10c592e AW |
604 | qemu_put_byte(f, n->promisc); |
605 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
606 | qemu_put_be32(f, n->mac_table.in_use); |
607 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 608 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
6c042c16 | 609 | qemu_put_be32(f, 0); /* vnet-hdr placeholder */ |
8fd2a2f1 AW |
610 | qemu_put_byte(f, n->mac_table.multi_overflow); |
611 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
612 | qemu_put_byte(f, n->alluni); |
613 | qemu_put_byte(f, n->nomulti); | |
614 | qemu_put_byte(f, n->nouni); | |
615 | qemu_put_byte(f, n->nobcast); | |
fbe78f4f AL |
616 | } |
617 | ||
618 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
619 | { | |
620 | VirtIONet *n = opaque; | |
2d9aba39 | 621 | int i; |
fbe78f4f | 622 | |
9d6271b8 | 623 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
624 | return -EINVAL; |
625 | ||
626 | virtio_load(&n->vdev, f); | |
627 | ||
79674068 | 628 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
fbe78f4f | 629 | n->tx_timer_active = qemu_get_be32(f); |
e46cb38f | 630 | n->mergeable_rx_bufs = qemu_get_be32(f); |
fbe78f4f | 631 | |
9d6271b8 AL |
632 | if (version_id >= 3) |
633 | n->status = qemu_get_be16(f); | |
634 | ||
002437cd | 635 | if (version_id >= 4) { |
f10c592e AW |
636 | if (version_id < 8) { |
637 | n->promisc = qemu_get_be32(f); | |
638 | n->allmulti = qemu_get_be32(f); | |
639 | } else { | |
640 | n->promisc = qemu_get_byte(f); | |
641 | n->allmulti = qemu_get_byte(f); | |
642 | } | |
002437cd AL |
643 | } |
644 | ||
b6503ed9 AL |
645 | if (version_id >= 5) { |
646 | n->mac_table.in_use = qemu_get_be32(f); | |
647 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
648 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
649 | qemu_get_buffer(f, n->mac_table.macs, | |
650 | n->mac_table.in_use * ETH_ALEN); | |
651 | } else if (n->mac_table.in_use) { | |
652 | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); | |
8fd2a2f1 | 653 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
654 | n->mac_table.in_use = 0; |
655 | } | |
656 | } | |
657 | ||
f21c0ed9 AL |
658 | if (version_id >= 6) |
659 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
660 | ||
6c042c16 AW |
661 | if (version_id >= 7 && qemu_get_be32(f)) { |
662 | fprintf(stderr, | |
663 | "virtio-net: saved image requires vnet header support\n"); | |
664 | exit(1); | |
665 | } | |
666 | ||
8fd2a2f1 AW |
667 | if (version_id >= 9) { |
668 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
669 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
670 | } | |
671 | ||
015cb166 AW |
672 | if (version_id >= 10) { |
673 | n->alluni = qemu_get_byte(f); | |
674 | n->nomulti = qemu_get_byte(f); | |
675 | n->nouni = qemu_get_byte(f); | |
676 | n->nobcast = qemu_get_byte(f); | |
677 | } | |
678 | ||
2d9aba39 AW |
679 | /* Find the first multicast entry in the saved MAC filter */ |
680 | for (i = 0; i < n->mac_table.in_use; i++) { | |
681 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
682 | break; | |
683 | } | |
684 | } | |
685 | n->mac_table.first_multi = i; | |
686 | ||
fbe78f4f AL |
687 | if (n->tx_timer_active) { |
688 | qemu_mod_timer(n->tx_timer, | |
689 | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); | |
690 | } | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
b946a153 AL |
695 | static void virtio_net_cleanup(VLANClientState *vc) |
696 | { | |
697 | VirtIONet *n = vc->opaque; | |
698 | ||
6243375f MM |
699 | qemu_purge_queued_packets(vc); |
700 | ||
b946a153 AL |
701 | unregister_savevm("virtio-net", n); |
702 | ||
703 | qemu_free(n->mac_table.macs); | |
704 | qemu_free(n->vlans); | |
705 | ||
706 | qemu_del_timer(n->tx_timer); | |
707 | qemu_free_timer(n->tx_timer); | |
708 | ||
709 | virtio_cleanup(&n->vdev); | |
710 | } | |
711 | ||
53c25cea | 712 | VirtIODevice *virtio_net_init(DeviceState *dev) |
fbe78f4f AL |
713 | { |
714 | VirtIONet *n; | |
715 | static int virtio_net_id; | |
716 | ||
53c25cea PB |
717 | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, |
718 | sizeof(struct virtio_net_config), | |
719 | sizeof(VirtIONet)); | |
fbe78f4f | 720 | |
0f03eca6 AL |
721 | n->vdev.get_config = virtio_net_get_config; |
722 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
723 | n->vdev.get_features = virtio_net_get_features; |
724 | n->vdev.set_features = virtio_net_set_features; | |
8eca6b1b | 725 | n->vdev.bad_features = virtio_net_bad_features; |
002437cd | 726 | n->vdev.reset = virtio_net_reset; |
fbe78f4f AL |
727 | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
728 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx); | |
4ffb17f5 | 729 | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); |
53c25cea | 730 | qdev_get_macaddr(dev, n->mac); |
554c97dd | 731 | n->status = VIRTIO_NET_S_LINK_UP; |
53c25cea | 732 | n->vc = qdev_get_vlan_client(dev, |
b946a153 | 733 | virtio_net_can_receive, |
463af534 | 734 | virtio_net_receive, NULL, |
b946a153 | 735 | virtio_net_cleanup, n); |
554c97dd | 736 | n->vc->link_status_changed = virtio_net_set_link_status; |
fbe78f4f | 737 | |
96d5e201 AL |
738 | qemu_format_nic_info_str(n->vc, n->mac); |
739 | ||
fbe78f4f AL |
740 | n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
741 | n->tx_timer_active = 0; | |
742 | n->mergeable_rx_bufs = 0; | |
002437cd | 743 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 744 | |
b6503ed9 | 745 | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 746 | |
f21c0ed9 | 747 | n->vlans = qemu_mallocz(MAX_VLAN >> 3); |
ffe6370c MT |
748 | if (dev->nd->nvectors == NIC_NVECTORS_UNSPECIFIED) |
749 | n->vdev.nvectors = 3; | |
750 | else | |
751 | n->vdev.nvectors = dev->nd->nvectors; | |
f21c0ed9 | 752 | |
9d6271b8 | 753 | register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION, |
fbe78f4f | 754 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 755 | |
53c25cea | 756 | return &n->vdev; |
cf21e106 | 757 | } |