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Commit | Line | Data |
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fbe78f4f AL |
1 | /* |
2 | * Virtio Network Device | |
3 | * | |
4 | * Copyright IBM, Corp. 2007 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
1de7afc9 | 14 | #include "qemu/iov.h" |
0d09e41a | 15 | #include "hw/virtio/virtio.h" |
1422e32d | 16 | #include "net/net.h" |
7200ac3c | 17 | #include "net/checksum.h" |
a8ed73f7 | 18 | #include "net/tap.h" |
1de7afc9 PB |
19 | #include "qemu/error-report.h" |
20 | #include "qemu/timer.h" | |
0d09e41a PB |
21 | #include "hw/virtio/virtio-net.h" |
22 | #include "net/vhost_net.h" | |
fbe78f4f | 23 | |
0ce0e8f4 | 24 | #define VIRTIO_NET_VM_VERSION 11 |
b6503ed9 | 25 | |
4ffb17f5 | 26 | #define MAC_TABLE_ENTRIES 64 |
f21c0ed9 | 27 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 28 | |
14f9b664 JL |
29 | /* |
30 | * Calculate the number of bytes up to and including the given 'field' of | |
31 | * 'container'. | |
32 | */ | |
33 | #define endof(container, field) \ | |
34 | (offsetof(container, field) + sizeof(((container *)0)->field)) | |
35 | ||
36 | typedef struct VirtIOFeature { | |
37 | uint32_t flags; | |
38 | size_t end; | |
39 | } VirtIOFeature; | |
40 | ||
41 | static VirtIOFeature feature_sizes[] = { | |
42 | {.flags = 1 << VIRTIO_NET_F_MAC, | |
43 | .end = endof(struct virtio_net_config, mac)}, | |
44 | {.flags = 1 << VIRTIO_NET_F_STATUS, | |
45 | .end = endof(struct virtio_net_config, status)}, | |
46 | {.flags = 1 << VIRTIO_NET_F_MQ, | |
47 | .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, | |
48 | {} | |
49 | }; | |
50 | ||
fed699f9 | 51 | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) |
0c87e93e JW |
52 | { |
53 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
54 | ||
fed699f9 | 55 | return &n->vqs[nc->queue_index]; |
0c87e93e | 56 | } |
fed699f9 JW |
57 | |
58 | static int vq2q(int queue_index) | |
59 | { | |
60 | return queue_index / 2; | |
61 | } | |
62 | ||
fbe78f4f AL |
63 | /* TODO |
64 | * - we could suppress RX interrupt if we were so inclined. | |
65 | */ | |
66 | ||
67 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
68 | { | |
69 | return (VirtIONet *)vdev; | |
70 | } | |
71 | ||
0f03eca6 | 72 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
73 | { |
74 | VirtIONet *n = to_virtio_net(vdev); | |
75 | struct virtio_net_config netcfg; | |
76 | ||
b46d97f2 | 77 | stw_p(&netcfg.status, n->status); |
fed699f9 | 78 | stw_p(&netcfg.max_virtqueue_pairs, n->max_queues); |
79674068 | 79 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
14f9b664 | 80 | memcpy(config, &netcfg, n->config_size); |
fbe78f4f AL |
81 | } |
82 | ||
0f03eca6 AL |
83 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
84 | { | |
85 | VirtIONet *n = to_virtio_net(vdev); | |
14f9b664 | 86 | struct virtio_net_config netcfg = {}; |
0f03eca6 | 87 | |
14f9b664 | 88 | memcpy(&netcfg, config, n->config_size); |
0f03eca6 | 89 | |
c1943a3f AK |
90 | if (!(n->vdev.guest_features >> VIRTIO_NET_F_CTRL_MAC_ADDR & 1) && |
91 | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { | |
79674068 | 92 | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
b356f76d | 93 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
0f03eca6 AL |
94 | } |
95 | } | |
96 | ||
783e7706 MT |
97 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
98 | { | |
99 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && | |
85cf2a8d | 100 | (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
783e7706 MT |
101 | } |
102 | ||
103 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) | |
afbaa7b4 | 104 | { |
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 | |
32993698 | 119 | if (!!n->vhost_started == virtio_net_started(n, status) && |
b356f76d | 120 | !nc->peer->link_down) { |
afbaa7b4 MT |
121 | return; |
122 | } | |
123 | if (!n->vhost_started) { | |
5430a28f | 124 | int r; |
b356f76d | 125 | if (!vhost_net_query(tap_get_vhost_net(nc->peer), &n->vdev)) { |
5430a28f MT |
126 | return; |
127 | } | |
1830b80f | 128 | n->vhost_started = 1; |
fed699f9 | 129 | r = vhost_net_start(&n->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 { | |
fed699f9 | 136 | vhost_net_stop(&n->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 | { | |
143 | VirtIONet *n = to_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) { | |
165 | qemu_mod_timer(q->tx_timer, | |
166 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); | |
167 | } else { | |
168 | qemu_bh_schedule(q->tx_bh); | |
169 | } | |
783e7706 | 170 | } else { |
fed699f9 JW |
171 | if (q->tx_timer) { |
172 | qemu_del_timer(q->tx_timer); | |
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); |
554c97dd AL |
183 | uint16_t old_status = n->status; |
184 | ||
eb6b6c12 | 185 | if (nc->link_down) |
554c97dd AL |
186 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
187 | else | |
188 | n->status |= VIRTIO_NET_S_LINK_UP; | |
189 | ||
190 | if (n->status != old_status) | |
191 | virtio_notify_config(&n->vdev); | |
afbaa7b4 MT |
192 | |
193 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
554c97dd AL |
194 | } |
195 | ||
002437cd AL |
196 | static void virtio_net_reset(VirtIODevice *vdev) |
197 | { | |
198 | VirtIONet *n = to_virtio_net(vdev); | |
199 | ||
200 | /* Reset back to compatibility mode */ | |
201 | n->promisc = 1; | |
202 | n->allmulti = 0; | |
015cb166 AW |
203 | n->alluni = 0; |
204 | n->nomulti = 0; | |
205 | n->nouni = 0; | |
206 | n->nobcast = 0; | |
fed699f9 JW |
207 | /* multiqueue is disabled by default */ |
208 | n->curr_queues = 1; | |
b6503ed9 | 209 | |
f21c0ed9 | 210 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 211 | n->mac_table.in_use = 0; |
2d9aba39 | 212 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
213 | n->mac_table.multi_overflow = 0; |
214 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 215 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
41dc8a67 | 216 | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
f21c0ed9 | 217 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
218 | } |
219 | ||
6e371ab8 | 220 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 221 | { |
b356f76d JW |
222 | NetClientState *nc = qemu_get_queue(n->nic); |
223 | if (!nc->peer) { | |
6e371ab8 | 224 | return; |
b356f76d | 225 | } |
3a330134 | 226 | |
b356f76d | 227 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
6e371ab8 | 228 | return; |
b356f76d | 229 | } |
3a330134 | 230 | |
b356f76d | 231 | n->has_vnet_hdr = tap_has_vnet_hdr(nc->peer); |
6e371ab8 | 232 | } |
3a330134 | 233 | |
6e371ab8 MT |
234 | static int peer_has_vnet_hdr(VirtIONet *n) |
235 | { | |
3a330134 MM |
236 | return n->has_vnet_hdr; |
237 | } | |
238 | ||
0ce0e8f4 MM |
239 | static int peer_has_ufo(VirtIONet *n) |
240 | { | |
241 | if (!peer_has_vnet_hdr(n)) | |
242 | return 0; | |
243 | ||
b356f76d | 244 | n->has_ufo = tap_has_ufo(qemu_get_queue(n->nic)->peer); |
0ce0e8f4 MM |
245 | |
246 | return n->has_ufo; | |
247 | } | |
248 | ||
ff3a8066 MT |
249 | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) |
250 | { | |
fed699f9 JW |
251 | int i; |
252 | NetClientState *nc; | |
253 | ||
ff3a8066 MT |
254 | n->mergeable_rx_bufs = mergeable_rx_bufs; |
255 | ||
256 | n->guest_hdr_len = n->mergeable_rx_bufs ? | |
257 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
258 | ||
fed699f9 JW |
259 | for (i = 0; i < n->max_queues; i++) { |
260 | nc = qemu_get_subqueue(n->nic, i); | |
261 | ||
262 | if (peer_has_vnet_hdr(n) && | |
263 | tap_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { | |
264 | tap_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); | |
265 | n->host_hdr_len = n->guest_hdr_len; | |
266 | } | |
ff3a8066 MT |
267 | } |
268 | } | |
269 | ||
fed699f9 JW |
270 | static int peer_attach(VirtIONet *n, int index) |
271 | { | |
272 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
273 | ||
274 | if (!nc->peer) { | |
275 | return 0; | |
276 | } | |
277 | ||
278 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
279 | return 0; | |
280 | } | |
281 | ||
282 | return tap_enable(nc->peer); | |
283 | } | |
284 | ||
285 | static int peer_detach(VirtIONet *n, int index) | |
286 | { | |
287 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
288 | ||
289 | if (!nc->peer) { | |
290 | return 0; | |
291 | } | |
292 | ||
293 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
294 | return 0; | |
295 | } | |
296 | ||
297 | return tap_disable(nc->peer); | |
298 | } | |
299 | ||
300 | static void virtio_net_set_queues(VirtIONet *n) | |
301 | { | |
302 | int i; | |
303 | ||
304 | for (i = 0; i < n->max_queues; i++) { | |
305 | if (i < n->curr_queues) { | |
306 | assert(!peer_attach(n, i)); | |
307 | } else { | |
308 | assert(!peer_detach(n, i)); | |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl); | |
314 | ||
8172539d | 315 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 316 | { |
3a330134 | 317 | VirtIONet *n = to_virtio_net(vdev); |
b356f76d | 318 | NetClientState *nc = qemu_get_queue(n->nic); |
fbe78f4f | 319 | |
c9f79a3f MT |
320 | features |= (1 << VIRTIO_NET_F_MAC); |
321 | ||
6e371ab8 | 322 | if (!peer_has_vnet_hdr(n)) { |
8172539d MT |
323 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); |
324 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
325 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
326 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
327 | ||
328 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
329 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
330 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
331 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
332 | } | |
3a330134 | 333 | |
8172539d MT |
334 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
335 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
336 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
337 | } |
338 | ||
b356f76d | 339 | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
9bc6304c MT |
340 | return features; |
341 | } | |
b356f76d | 342 | if (!tap_get_vhost_net(nc->peer)) { |
9bc6304c MT |
343 | return features; |
344 | } | |
b356f76d | 345 | return vhost_net_get_features(tap_get_vhost_net(nc->peer), features); |
fbe78f4f AL |
346 | } |
347 | ||
8eca6b1b AL |
348 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
349 | { | |
350 | uint32_t features = 0; | |
351 | ||
352 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
353 | * but also these: */ | |
354 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
355 | features |= (1 << VIRTIO_NET_F_CSUM); |
356 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
357 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
358 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 359 | |
8172539d | 360 | return features; |
8eca6b1b AL |
361 | } |
362 | ||
fbe78f4f AL |
363 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
364 | { | |
365 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 JW |
366 | int i; |
367 | ||
368 | virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ)), | |
369 | !!(features & (1 << VIRTIO_NET_F_CTRL_VQ))); | |
fbe78f4f | 370 | |
ff3a8066 | 371 | virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF))); |
f5436dd9 MM |
372 | |
373 | if (n->has_vnet_hdr) { | |
fed699f9 | 374 | tap_set_offload(qemu_get_subqueue(n->nic, 0)->peer, |
f5436dd9 MM |
375 | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
376 | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
377 | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
6c9f58ba SS |
378 | (features >> VIRTIO_NET_F_GUEST_ECN) & 1, |
379 | (features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
f5436dd9 | 380 | } |
fed699f9 JW |
381 | |
382 | for (i = 0; i < n->max_queues; i++) { | |
383 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
384 | ||
385 | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
386 | continue; | |
387 | } | |
388 | if (!tap_get_vhost_net(nc->peer)) { | |
389 | continue; | |
390 | } | |
391 | vhost_net_ack_features(tap_get_vhost_net(nc->peer), features); | |
dc14a397 | 392 | } |
fbe78f4f AL |
393 | } |
394 | ||
002437cd | 395 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 396 | struct iovec *iov, unsigned int iov_cnt) |
002437cd AL |
397 | { |
398 | uint8_t on; | |
921ac5d0 | 399 | size_t s; |
002437cd | 400 | |
921ac5d0 MT |
401 | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
402 | if (s != sizeof(on)) { | |
403 | return VIRTIO_NET_ERR; | |
002437cd AL |
404 | } |
405 | ||
dd23454b | 406 | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { |
002437cd | 407 | n->promisc = on; |
dd23454b | 408 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
002437cd | 409 | n->allmulti = on; |
dd23454b | 410 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
015cb166 | 411 | n->alluni = on; |
dd23454b | 412 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
015cb166 | 413 | n->nomulti = on; |
dd23454b | 414 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
015cb166 | 415 | n->nouni = on; |
dd23454b | 416 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
015cb166 | 417 | n->nobcast = on; |
921ac5d0 | 418 | } else { |
002437cd | 419 | return VIRTIO_NET_ERR; |
921ac5d0 | 420 | } |
002437cd AL |
421 | |
422 | return VIRTIO_NET_OK; | |
423 | } | |
424 | ||
b6503ed9 | 425 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 426 | struct iovec *iov, unsigned int iov_cnt) |
b6503ed9 AL |
427 | { |
428 | struct virtio_net_ctrl_mac mac_data; | |
921ac5d0 | 429 | size_t s; |
b6503ed9 | 430 | |
c1943a3f AK |
431 | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { |
432 | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { | |
433 | return VIRTIO_NET_ERR; | |
434 | } | |
435 | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); | |
436 | assert(s == sizeof(n->mac)); | |
b356f76d | 437 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
c1943a3f AK |
438 | return VIRTIO_NET_OK; |
439 | } | |
440 | ||
921ac5d0 | 441 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { |
b6503ed9 | 442 | return VIRTIO_NET_ERR; |
921ac5d0 | 443 | } |
b6503ed9 AL |
444 | |
445 | n->mac_table.in_use = 0; | |
2d9aba39 | 446 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
447 | n->mac_table.uni_overflow = 0; |
448 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
449 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
450 | ||
921ac5d0 MT |
451 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
452 | sizeof(mac_data.entries)); | |
453 | mac_data.entries = ldl_p(&mac_data.entries); | |
454 | if (s != sizeof(mac_data.entries)) { | |
455 | return VIRTIO_NET_ERR; | |
456 | } | |
457 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 458 | |
921ac5d0 | 459 | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { |
b6503ed9 | 460 | return VIRTIO_NET_ERR; |
921ac5d0 | 461 | } |
b6503ed9 AL |
462 | |
463 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
921ac5d0 MT |
464 | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs, |
465 | mac_data.entries * ETH_ALEN); | |
466 | if (s != mac_data.entries * ETH_ALEN) { | |
467 | return VIRTIO_NET_ERR; | |
468 | } | |
b6503ed9 AL |
469 | n->mac_table.in_use += mac_data.entries; |
470 | } else { | |
8fd2a2f1 | 471 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
472 | } |
473 | ||
921ac5d0 MT |
474 | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
475 | ||
2d9aba39 AW |
476 | n->mac_table.first_multi = n->mac_table.in_use; |
477 | ||
921ac5d0 MT |
478 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
479 | sizeof(mac_data.entries)); | |
480 | mac_data.entries = ldl_p(&mac_data.entries); | |
481 | if (s != sizeof(mac_data.entries)) { | |
482 | return VIRTIO_NET_ERR; | |
483 | } | |
484 | ||
485 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 486 | |
921ac5d0 | 487 | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { |
b6503ed9 | 488 | return VIRTIO_NET_ERR; |
921ac5d0 | 489 | } |
b6503ed9 | 490 | |
921ac5d0 MT |
491 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { |
492 | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs, | |
493 | mac_data.entries * ETH_ALEN); | |
494 | if (s != mac_data.entries * ETH_ALEN) { | |
495 | return VIRTIO_NET_ERR; | |
8fd2a2f1 | 496 | } |
921ac5d0 MT |
497 | n->mac_table.in_use += mac_data.entries; |
498 | } else { | |
499 | n->mac_table.multi_overflow = 1; | |
b6503ed9 AL |
500 | } |
501 | ||
502 | return VIRTIO_NET_OK; | |
503 | } | |
504 | ||
f21c0ed9 | 505 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 506 | struct iovec *iov, unsigned int iov_cnt) |
f21c0ed9 AL |
507 | { |
508 | uint16_t vid; | |
921ac5d0 | 509 | size_t s; |
f21c0ed9 | 510 | |
921ac5d0 MT |
511 | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
512 | vid = lduw_p(&vid); | |
513 | if (s != sizeof(vid)) { | |
f21c0ed9 AL |
514 | return VIRTIO_NET_ERR; |
515 | } | |
516 | ||
f21c0ed9 AL |
517 | if (vid >= MAX_VLAN) |
518 | return VIRTIO_NET_ERR; | |
519 | ||
520 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
521 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
522 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
523 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
524 | else | |
525 | return VIRTIO_NET_ERR; | |
526 | ||
527 | return VIRTIO_NET_OK; | |
528 | } | |
529 | ||
fed699f9 | 530 | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
f8f7c533 | 531 | struct iovec *iov, unsigned int iov_cnt) |
fed699f9 | 532 | { |
f8f7c533 JW |
533 | struct virtio_net_ctrl_mq mq; |
534 | size_t s; | |
535 | uint16_t queues; | |
fed699f9 | 536 | |
f8f7c533 JW |
537 | s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); |
538 | if (s != sizeof(mq)) { | |
fed699f9 JW |
539 | return VIRTIO_NET_ERR; |
540 | } | |
541 | ||
542 | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { | |
543 | return VIRTIO_NET_ERR; | |
544 | } | |
545 | ||
f8f7c533 | 546 | queues = lduw_p(&mq.virtqueue_pairs); |
fed699f9 | 547 | |
f8f7c533 JW |
548 | if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || |
549 | queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
550 | queues > n->max_queues || | |
fed699f9 JW |
551 | !n->multiqueue) { |
552 | return VIRTIO_NET_ERR; | |
553 | } | |
554 | ||
f8f7c533 | 555 | n->curr_queues = queues; |
fed699f9 JW |
556 | /* stop the backend before changing the number of queues to avoid handling a |
557 | * disabled queue */ | |
558 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
559 | virtio_net_set_queues(n); | |
560 | ||
561 | return VIRTIO_NET_OK; | |
562 | } | |
3d11d36c AL |
563 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
564 | { | |
002437cd | 565 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
566 | struct virtio_net_ctrl_hdr ctrl; |
567 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
568 | VirtQueueElement elem; | |
921ac5d0 MT |
569 | size_t s; |
570 | struct iovec *iov; | |
571 | unsigned int iov_cnt; | |
3d11d36c AL |
572 | |
573 | while (virtqueue_pop(vq, &elem)) { | |
921ac5d0 MT |
574 | if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || |
575 | iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { | |
e7b43f7e | 576 | error_report("virtio-net ctrl missing headers"); |
3d11d36c AL |
577 | exit(1); |
578 | } | |
579 | ||
921ac5d0 MT |
580 | iov = elem.out_sg; |
581 | iov_cnt = elem.out_num; | |
582 | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); | |
583 | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); | |
584 | if (s != sizeof(ctrl)) { | |
585 | status = VIRTIO_NET_ERR; | |
dd23454b | 586 | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
921ac5d0 MT |
587 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
588 | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { | |
589 | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); | |
590 | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { | |
591 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); | |
fed699f9 | 592 | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
f8f7c533 | 593 | status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); |
3d11d36c AL |
594 | } |
595 | ||
921ac5d0 MT |
596 | s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); |
597 | assert(s == sizeof(status)); | |
3d11d36c AL |
598 | |
599 | virtqueue_push(vq, &elem, sizeof(status)); | |
600 | virtio_notify(vdev, vq); | |
601 | } | |
602 | } | |
603 | ||
fbe78f4f AL |
604 | /* RX */ |
605 | ||
606 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
607 | { | |
8aeff62d | 608 | VirtIONet *n = to_virtio_net(vdev); |
fed699f9 | 609 | int queue_index = vq2q(virtio_get_queue_index(vq)); |
8aeff62d | 610 | |
fed699f9 | 611 | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
fbe78f4f AL |
612 | } |
613 | ||
4e68f7a0 | 614 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 615 | { |
cc1f0f45 | 616 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 617 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
0c87e93e | 618 | |
85cf2a8d | 619 | if (!n->vdev.vm_running) { |
95477323 MT |
620 | return 0; |
621 | } | |
cdd5cc12 | 622 | |
fed699f9 JW |
623 | if (nc->queue_index >= n->curr_queues) { |
624 | return 0; | |
625 | } | |
626 | ||
0c87e93e JW |
627 | if (!virtio_queue_ready(q->rx_vq) || |
628 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { | |
fbe78f4f | 629 | return 0; |
0c87e93e | 630 | } |
fbe78f4f | 631 | |
cdd5cc12 MM |
632 | return 1; |
633 | } | |
634 | ||
0c87e93e | 635 | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
cdd5cc12 | 636 | { |
0c87e93e JW |
637 | VirtIONet *n = q->n; |
638 | if (virtio_queue_empty(q->rx_vq) || | |
fbe78f4f | 639 | (n->mergeable_rx_bufs && |
0c87e93e JW |
640 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
641 | virtio_queue_set_notification(q->rx_vq, 1); | |
06b12970 TL |
642 | |
643 | /* To avoid a race condition where the guest has made some buffers | |
644 | * available after the above check but before notification was | |
645 | * enabled, check for available buffers again. | |
646 | */ | |
0c87e93e | 647 | if (virtio_queue_empty(q->rx_vq) || |
06b12970 | 648 | (n->mergeable_rx_bufs && |
0c87e93e | 649 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
06b12970 | 650 | return 0; |
0c87e93e | 651 | } |
fbe78f4f AL |
652 | } |
653 | ||
0c87e93e | 654 | virtio_queue_set_notification(q->rx_vq, 0); |
fbe78f4f AL |
655 | return 1; |
656 | } | |
657 | ||
1d41b0c1 AL |
658 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
659 | * it never finds out that the packets don't have valid checksums. This | |
660 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
661 | * fix this with Xen but it hasn't appeared in an upstream release of | |
662 | * dhclient yet. | |
663 | * | |
664 | * To avoid breaking existing guests, we catch udp packets and add | |
665 | * checksums. This is terrible but it's better than hacking the guest | |
666 | * kernels. | |
667 | * | |
668 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
669 | * we should provide a mechanism to disable it to avoid polluting the host | |
670 | * cache. | |
671 | */ | |
672 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 673 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
674 | { |
675 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
676 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
677 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
678 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
679 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 680 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
681 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
682 | } | |
683 | } | |
684 | ||
280598b7 MT |
685 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
686 | const void *buf, size_t size) | |
fbe78f4f | 687 | { |
3a330134 | 688 | if (n->has_vnet_hdr) { |
22cc84db MT |
689 | /* FIXME this cast is evil */ |
690 | void *wbuf = (void *)buf; | |
280598b7 MT |
691 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
692 | size - n->host_hdr_len); | |
693 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); | |
22cc84db MT |
694 | } else { |
695 | struct virtio_net_hdr hdr = { | |
696 | .flags = 0, | |
697 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
698 | }; | |
699 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 700 | } |
fbe78f4f AL |
701 | } |
702 | ||
3831ab20 AL |
703 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
704 | { | |
705 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 706 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 707 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 708 | int i; |
3831ab20 AL |
709 | |
710 | if (n->promisc) | |
711 | return 1; | |
712 | ||
e043ebc6 | 713 | ptr += n->host_hdr_len; |
3a330134 | 714 | |
f21c0ed9 AL |
715 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
716 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
717 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
718 | return 0; | |
719 | } | |
720 | ||
bbe2f399 AW |
721 | if (ptr[0] & 1) { // multicast |
722 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
723 | return !n->nobcast; |
724 | } else if (n->nomulti) { | |
725 | return 0; | |
8fd2a2f1 | 726 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
727 | return 1; |
728 | } | |
2d9aba39 AW |
729 | |
730 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
731 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
732 | return 1; | |
733 | } | |
734 | } | |
bbe2f399 | 735 | } else { // unicast |
015cb166 AW |
736 | if (n->nouni) { |
737 | return 0; | |
738 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
739 | return 1; |
740 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
741 | return 1; |
742 | } | |
3831ab20 | 743 | |
2d9aba39 AW |
744 | for (i = 0; i < n->mac_table.first_multi; i++) { |
745 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
746 | return 1; | |
747 | } | |
748 | } | |
b6503ed9 AL |
749 | } |
750 | ||
3831ab20 AL |
751 | return 0; |
752 | } | |
753 | ||
4e68f7a0 | 754 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 755 | { |
cc1f0f45 | 756 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 757 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
63c58728 MT |
758 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
759 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
760 | unsigned mhdr_cnt = 0; | |
22cc84db | 761 | size_t offset, i, guest_offset; |
fbe78f4f | 762 | |
fed699f9 | 763 | if (!virtio_net_can_receive(nc)) { |
cdd5cc12 | 764 | return -1; |
b356f76d | 765 | } |
cdd5cc12 | 766 | |
940cda94 | 767 | /* hdr_len refers to the header we supply to the guest */ |
0c87e93e | 768 | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { |
8aeff62d | 769 | return 0; |
0c87e93e | 770 | } |
fbe78f4f | 771 | |
3831ab20 | 772 | if (!receive_filter(n, buf, size)) |
4f1c942b | 773 | return size; |
3831ab20 | 774 | |
fbe78f4f AL |
775 | offset = i = 0; |
776 | ||
777 | while (offset < size) { | |
778 | VirtQueueElement elem; | |
779 | int len, total; | |
22cc84db | 780 | const struct iovec *sg = elem.in_sg; |
fbe78f4f | 781 | |
22c253d9 | 782 | total = 0; |
fbe78f4f | 783 | |
0c87e93e | 784 | if (virtqueue_pop(q->rx_vq, &elem) == 0) { |
fbe78f4f | 785 | if (i == 0) |
4f1c942b | 786 | return -1; |
e7b43f7e | 787 | error_report("virtio-net unexpected empty queue: " |
279a4253 | 788 | "i %zd mergeable %d offset %zd, size %zd, " |
e7b43f7e | 789 | "guest hdr len %zd, host hdr len %zd guest features 0x%x", |
279a4253 | 790 | i, n->mergeable_rx_bufs, offset, size, |
e35e23f6 | 791 | n->guest_hdr_len, n->host_hdr_len, n->vdev.guest_features); |
fbe78f4f AL |
792 | exit(1); |
793 | } | |
794 | ||
795 | if (elem.in_num < 1) { | |
e7b43f7e | 796 | error_report("virtio-net receive queue contains no in buffers"); |
fbe78f4f AL |
797 | exit(1); |
798 | } | |
799 | ||
fbe78f4f | 800 | if (i == 0) { |
c8d28e7e | 801 | assert(offset == 0); |
63c58728 MT |
802 | if (n->mergeable_rx_bufs) { |
803 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
804 | sg, elem.in_num, | |
805 | offsetof(typeof(mhdr), num_buffers), | |
806 | sizeof(mhdr.num_buffers)); | |
807 | } | |
fbe78f4f | 808 | |
c8d28e7e MT |
809 | receive_header(n, sg, elem.in_num, buf, size); |
810 | offset = n->host_hdr_len; | |
e35e23f6 | 811 | total += n->guest_hdr_len; |
22cc84db MT |
812 | guest_offset = n->guest_hdr_len; |
813 | } else { | |
814 | guest_offset = 0; | |
fbe78f4f AL |
815 | } |
816 | ||
817 | /* copy in packet. ugh */ | |
22cc84db | 818 | len = iov_from_buf(sg, elem.in_num, guest_offset, |
dcf6f5e1 | 819 | buf + offset, size - offset); |
fbe78f4f | 820 | total += len; |
279a4253 MT |
821 | offset += len; |
822 | /* If buffers can't be merged, at this point we | |
823 | * must have consumed the complete packet. | |
824 | * Otherwise, drop it. */ | |
825 | if (!n->mergeable_rx_bufs && offset < size) { | |
826 | #if 0 | |
e7b43f7e SH |
827 | error_report("virtio-net truncated non-mergeable packet: " |
828 | "i %zd mergeable %d offset %zd, size %zd, " | |
829 | "guest hdr len %zd, host hdr len %zd", | |
830 | i, n->mergeable_rx_bufs, | |
e35e23f6 | 831 | offset, size, n->guest_hdr_len, n->host_hdr_len); |
279a4253 MT |
832 | #endif |
833 | return size; | |
834 | } | |
fbe78f4f AL |
835 | |
836 | /* signal other side */ | |
0c87e93e | 837 | virtqueue_fill(q->rx_vq, &elem, total, i++); |
fbe78f4f AL |
838 | } |
839 | ||
63c58728 MT |
840 | if (mhdr_cnt) { |
841 | stw_p(&mhdr.num_buffers, i); | |
842 | iov_from_buf(mhdr_sg, mhdr_cnt, | |
843 | 0, | |
844 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 845 | } |
fbe78f4f | 846 | |
0c87e93e JW |
847 | virtqueue_flush(q->rx_vq, i); |
848 | virtio_notify(&n->vdev, q->rx_vq); | |
4f1c942b MM |
849 | |
850 | return size; | |
fbe78f4f AL |
851 | } |
852 | ||
0c87e93e | 853 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q); |
6243375f | 854 | |
4e68f7a0 | 855 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 856 | { |
cc1f0f45 | 857 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 858 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
6243375f | 859 | |
0c87e93e JW |
860 | virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); |
861 | virtio_notify(&n->vdev, q->tx_vq); | |
6243375f | 862 | |
0c87e93e | 863 | q->async_tx.elem.out_num = q->async_tx.len = 0; |
6243375f | 864 | |
0c87e93e JW |
865 | virtio_queue_set_notification(q->tx_vq, 1); |
866 | virtio_net_flush_tx(q); | |
6243375f MM |
867 | } |
868 | ||
fbe78f4f | 869 | /* TX */ |
0c87e93e | 870 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q) |
fbe78f4f | 871 | { |
0c87e93e | 872 | VirtIONet *n = q->n; |
fbe78f4f | 873 | VirtQueueElement elem; |
e3f30488 | 874 | int32_t num_packets = 0; |
fed699f9 | 875 | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); |
e3f30488 AW |
876 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
877 | return num_packets; | |
878 | } | |
fbe78f4f | 879 | |
85cf2a8d | 880 | assert(n->vdev.vm_running); |
783e7706 | 881 | |
0c87e93e JW |
882 | if (q->async_tx.elem.out_num) { |
883 | virtio_queue_set_notification(q->tx_vq, 0); | |
e3f30488 | 884 | return num_packets; |
6243375f MM |
885 | } |
886 | ||
0c87e93e | 887 | while (virtqueue_pop(q->tx_vq, &elem)) { |
14761f9c | 888 | ssize_t ret, len; |
fbe78f4f AL |
889 | unsigned int out_num = elem.out_num; |
890 | struct iovec *out_sg = &elem.out_sg[0]; | |
14761f9c | 891 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; |
fbe78f4f | 892 | |
7b80d08e | 893 | if (out_num < 1) { |
e7b43f7e | 894 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
895 | exit(1); |
896 | } | |
897 | ||
14761f9c MT |
898 | /* |
899 | * If host wants to see the guest header as is, we can | |
900 | * pass it on unchanged. Otherwise, copy just the parts | |
901 | * that host is interested in. | |
902 | */ | |
903 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
904 | if (n->host_hdr_len != n->guest_hdr_len) { | |
905 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
906 | out_sg, out_num, | |
907 | 0, n->host_hdr_len); | |
908 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
909 | out_sg, out_num, | |
910 | n->guest_hdr_len, -1); | |
911 | out_num = sg_num; | |
912 | out_sg = sg; | |
fbe78f4f AL |
913 | } |
914 | ||
7b80d08e | 915 | len = n->guest_hdr_len; |
14761f9c | 916 | |
fed699f9 JW |
917 | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
918 | out_sg, out_num, virtio_net_tx_complete); | |
6243375f | 919 | if (ret == 0) { |
0c87e93e JW |
920 | virtio_queue_set_notification(q->tx_vq, 0); |
921 | q->async_tx.elem = elem; | |
922 | q->async_tx.len = len; | |
e3f30488 | 923 | return -EBUSY; |
6243375f MM |
924 | } |
925 | ||
926 | len += ret; | |
fbe78f4f | 927 | |
0c87e93e JW |
928 | virtqueue_push(q->tx_vq, &elem, 0); |
929 | virtio_notify(&n->vdev, q->tx_vq); | |
e3f30488 AW |
930 | |
931 | if (++num_packets >= n->tx_burst) { | |
932 | break; | |
933 | } | |
fbe78f4f | 934 | } |
e3f30488 | 935 | return num_packets; |
fbe78f4f AL |
936 | } |
937 | ||
a697a334 | 938 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f AL |
939 | { |
940 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 941 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
fbe78f4f | 942 | |
783e7706 | 943 | /* This happens when device was stopped but VCPU wasn't. */ |
85cf2a8d | 944 | if (!n->vdev.vm_running) { |
0c87e93e | 945 | q->tx_waiting = 1; |
783e7706 MT |
946 | return; |
947 | } | |
948 | ||
0c87e93e | 949 | if (q->tx_waiting) { |
fbe78f4f | 950 | virtio_queue_set_notification(vq, 1); |
0c87e93e JW |
951 | qemu_del_timer(q->tx_timer); |
952 | q->tx_waiting = 0; | |
953 | virtio_net_flush_tx(q); | |
fbe78f4f | 954 | } else { |
0c87e93e | 955 | qemu_mod_timer(q->tx_timer, |
74475455 | 956 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
0c87e93e | 957 | q->tx_waiting = 1; |
fbe78f4f AL |
958 | virtio_queue_set_notification(vq, 0); |
959 | } | |
960 | } | |
961 | ||
a697a334 AW |
962 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
963 | { | |
964 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 965 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
a697a334 | 966 | |
0c87e93e | 967 | if (unlikely(q->tx_waiting)) { |
a697a334 AW |
968 | return; |
969 | } | |
0c87e93e | 970 | q->tx_waiting = 1; |
783e7706 | 971 | /* This happens when device was stopped but VCPU wasn't. */ |
85cf2a8d | 972 | if (!n->vdev.vm_running) { |
783e7706 MT |
973 | return; |
974 | } | |
a697a334 | 975 | virtio_queue_set_notification(vq, 0); |
0c87e93e | 976 | qemu_bh_schedule(q->tx_bh); |
a697a334 AW |
977 | } |
978 | ||
fbe78f4f AL |
979 | static void virtio_net_tx_timer(void *opaque) |
980 | { | |
0c87e93e JW |
981 | VirtIONetQueue *q = opaque; |
982 | VirtIONet *n = q->n; | |
85cf2a8d | 983 | assert(n->vdev.vm_running); |
fbe78f4f | 984 | |
0c87e93e | 985 | q->tx_waiting = 0; |
fbe78f4f AL |
986 | |
987 | /* Just in case the driver is not ready on more */ | |
988 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
989 | return; | |
990 | ||
0c87e93e JW |
991 | virtio_queue_set_notification(q->tx_vq, 1); |
992 | virtio_net_flush_tx(q); | |
fbe78f4f AL |
993 | } |
994 | ||
a697a334 AW |
995 | static void virtio_net_tx_bh(void *opaque) |
996 | { | |
0c87e93e JW |
997 | VirtIONetQueue *q = opaque; |
998 | VirtIONet *n = q->n; | |
a697a334 AW |
999 | int32_t ret; |
1000 | ||
85cf2a8d | 1001 | assert(n->vdev.vm_running); |
783e7706 | 1002 | |
0c87e93e | 1003 | q->tx_waiting = 0; |
a697a334 AW |
1004 | |
1005 | /* Just in case the driver is not ready on more */ | |
1006 | if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))) | |
1007 | return; | |
1008 | ||
0c87e93e | 1009 | ret = virtio_net_flush_tx(q); |
a697a334 AW |
1010 | if (ret == -EBUSY) { |
1011 | return; /* Notification re-enable handled by tx_complete */ | |
1012 | } | |
1013 | ||
1014 | /* If we flush a full burst of packets, assume there are | |
1015 | * more coming and immediately reschedule */ | |
1016 | if (ret >= n->tx_burst) { | |
0c87e93e JW |
1017 | qemu_bh_schedule(q->tx_bh); |
1018 | q->tx_waiting = 1; | |
a697a334 AW |
1019 | return; |
1020 | } | |
1021 | ||
1022 | /* If less than a full burst, re-enable notification and flush | |
1023 | * anything that may have come in while we weren't looking. If | |
1024 | * we find something, assume the guest is still active and reschedule */ | |
0c87e93e JW |
1025 | virtio_queue_set_notification(q->tx_vq, 1); |
1026 | if (virtio_net_flush_tx(q) > 0) { | |
1027 | virtio_queue_set_notification(q->tx_vq, 0); | |
1028 | qemu_bh_schedule(q->tx_bh); | |
1029 | q->tx_waiting = 1; | |
a697a334 AW |
1030 | } |
1031 | } | |
1032 | ||
fed699f9 JW |
1033 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl) |
1034 | { | |
1035 | VirtIODevice *vdev = &n->vdev; | |
1036 | int i, max = multiqueue ? n->max_queues : 1; | |
1037 | ||
1038 | n->multiqueue = multiqueue; | |
1039 | ||
1040 | for (i = 2; i <= n->max_queues * 2 + 1; i++) { | |
1041 | virtio_del_queue(vdev, i); | |
1042 | } | |
1043 | ||
1044 | for (i = 1; i < max; i++) { | |
1045 | n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); | |
1046 | if (n->vqs[i].tx_timer) { | |
1047 | n->vqs[i].tx_vq = | |
1048 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); | |
1049 | n->vqs[i].tx_timer = qemu_new_timer_ns(vm_clock, | |
1050 | virtio_net_tx_timer, | |
1051 | &n->vqs[i]); | |
1052 | } else { | |
1053 | n->vqs[i].tx_vq = | |
1054 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); | |
1055 | n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); | |
1056 | } | |
1057 | ||
1058 | n->vqs[i].tx_waiting = 0; | |
1059 | n->vqs[i].n = n; | |
1060 | } | |
1061 | ||
1062 | if (ctrl) { | |
1063 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); | |
1064 | } | |
1065 | ||
1066 | virtio_net_set_queues(n); | |
1067 | } | |
1068 | ||
fbe78f4f AL |
1069 | static void virtio_net_save(QEMUFile *f, void *opaque) |
1070 | { | |
5f800801 | 1071 | int i; |
fbe78f4f AL |
1072 | VirtIONet *n = opaque; |
1073 | ||
afbaa7b4 MT |
1074 | /* At this point, backend must be stopped, otherwise |
1075 | * it might keep writing to memory. */ | |
1076 | assert(!n->vhost_started); | |
fbe78f4f AL |
1077 | virtio_save(&n->vdev, f); |
1078 | ||
79674068 | 1079 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1080 | qemu_put_be32(f, n->vqs[0].tx_waiting); |
e46cb38f | 1081 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 1082 | qemu_put_be16(f, n->status); |
f10c592e AW |
1083 | qemu_put_byte(f, n->promisc); |
1084 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
1085 | qemu_put_be32(f, n->mac_table.in_use); |
1086 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 1087 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 1088 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
1089 | qemu_put_byte(f, n->mac_table.multi_overflow); |
1090 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
1091 | qemu_put_byte(f, n->alluni); |
1092 | qemu_put_byte(f, n->nomulti); | |
1093 | qemu_put_byte(f, n->nouni); | |
1094 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 1095 | qemu_put_byte(f, n->has_ufo); |
5f800801 JW |
1096 | if (n->max_queues > 1) { |
1097 | qemu_put_be16(f, n->max_queues); | |
1098 | qemu_put_be16(f, n->curr_queues); | |
1099 | for (i = 1; i < n->curr_queues; i++) { | |
1100 | qemu_put_be32(f, n->vqs[i].tx_waiting); | |
1101 | } | |
1102 | } | |
fbe78f4f AL |
1103 | } |
1104 | ||
1105 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
1106 | { | |
1107 | VirtIONet *n = opaque; | |
5f800801 | 1108 | int ret, i, link_down; |
fbe78f4f | 1109 | |
9d6271b8 | 1110 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
1111 | return -EINVAL; |
1112 | ||
2a633c46 OW |
1113 | ret = virtio_load(&n->vdev, f); |
1114 | if (ret) { | |
1115 | return ret; | |
1116 | } | |
fbe78f4f | 1117 | |
79674068 | 1118 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1119 | n->vqs[0].tx_waiting = qemu_get_be32(f); |
ff3a8066 MT |
1120 | |
1121 | virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f)); | |
fbe78f4f | 1122 | |
9d6271b8 AL |
1123 | if (version_id >= 3) |
1124 | n->status = qemu_get_be16(f); | |
1125 | ||
002437cd | 1126 | if (version_id >= 4) { |
f10c592e AW |
1127 | if (version_id < 8) { |
1128 | n->promisc = qemu_get_be32(f); | |
1129 | n->allmulti = qemu_get_be32(f); | |
1130 | } else { | |
1131 | n->promisc = qemu_get_byte(f); | |
1132 | n->allmulti = qemu_get_byte(f); | |
1133 | } | |
002437cd AL |
1134 | } |
1135 | ||
b6503ed9 AL |
1136 | if (version_id >= 5) { |
1137 | n->mac_table.in_use = qemu_get_be32(f); | |
1138 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
1139 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
1140 | qemu_get_buffer(f, n->mac_table.macs, | |
1141 | n->mac_table.in_use * ETH_ALEN); | |
1142 | } else if (n->mac_table.in_use) { | |
e398d61b JQ |
1143 | uint8_t *buf = g_malloc0(n->mac_table.in_use); |
1144 | qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN); | |
1145 | g_free(buf); | |
8fd2a2f1 | 1146 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
1147 | n->mac_table.in_use = 0; |
1148 | } | |
1149 | } | |
1150 | ||
f21c0ed9 AL |
1151 | if (version_id >= 6) |
1152 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
1153 | ||
3a330134 MM |
1154 | if (version_id >= 7) { |
1155 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 1156 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
1157 | return -1; |
1158 | } | |
1159 | ||
1160 | if (n->has_vnet_hdr) { | |
b356f76d | 1161 | tap_set_offload(qemu_get_queue(n->nic)->peer, |
704a76fc MT |
1162 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
1163 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
1164 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
1165 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1, | |
1166 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
3a330134 | 1167 | } |
6c042c16 AW |
1168 | } |
1169 | ||
8fd2a2f1 AW |
1170 | if (version_id >= 9) { |
1171 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
1172 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
1173 | } | |
1174 | ||
015cb166 AW |
1175 | if (version_id >= 10) { |
1176 | n->alluni = qemu_get_byte(f); | |
1177 | n->nomulti = qemu_get_byte(f); | |
1178 | n->nouni = qemu_get_byte(f); | |
1179 | n->nobcast = qemu_get_byte(f); | |
1180 | } | |
1181 | ||
0ce0e8f4 MM |
1182 | if (version_id >= 11) { |
1183 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 1184 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
1185 | return -1; |
1186 | } | |
1187 | } | |
1188 | ||
5f800801 JW |
1189 | if (n->max_queues > 1) { |
1190 | if (n->max_queues != qemu_get_be16(f)) { | |
1191 | error_report("virtio-net: different max_queues "); | |
1192 | return -1; | |
1193 | } | |
1194 | ||
1195 | n->curr_queues = qemu_get_be16(f); | |
1196 | for (i = 1; i < n->curr_queues; i++) { | |
1197 | n->vqs[i].tx_waiting = qemu_get_be32(f); | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | virtio_net_set_queues(n); | |
1202 | ||
2d9aba39 AW |
1203 | /* Find the first multicast entry in the saved MAC filter */ |
1204 | for (i = 0; i < n->mac_table.in_use; i++) { | |
1205 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
1206 | break; | |
1207 | } | |
1208 | } | |
1209 | n->mac_table.first_multi = i; | |
98991481 AK |
1210 | |
1211 | /* nc.link_down can't be migrated, so infer link_down according | |
1212 | * to link status bit in n->status */ | |
5f800801 JW |
1213 | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; |
1214 | for (i = 0; i < n->max_queues; i++) { | |
1215 | qemu_get_subqueue(n->nic, i)->link_down = link_down; | |
1216 | } | |
98991481 | 1217 | |
fbe78f4f AL |
1218 | return 0; |
1219 | } | |
1220 | ||
4e68f7a0 | 1221 | static void virtio_net_cleanup(NetClientState *nc) |
b946a153 | 1222 | { |
cc1f0f45 | 1223 | VirtIONet *n = qemu_get_nic_opaque(nc); |
b946a153 | 1224 | |
eb6b6c12 | 1225 | n->nic = NULL; |
b946a153 AL |
1226 | } |
1227 | ||
eb6b6c12 | 1228 | static NetClientInfo net_virtio_info = { |
2be64a68 | 1229 | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
eb6b6c12 MM |
1230 | .size = sizeof(NICState), |
1231 | .can_receive = virtio_net_can_receive, | |
1232 | .receive = virtio_net_receive, | |
1233 | .cleanup = virtio_net_cleanup, | |
1234 | .link_status_changed = virtio_net_set_link_status, | |
1235 | }; | |
1236 | ||
f56a1247 MT |
1237 | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
1238 | { | |
1239 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 1240 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1241 | assert(n->vhost_started); |
b356f76d | 1242 | return vhost_net_virtqueue_pending(tap_get_vhost_net(nc->peer), idx); |
f56a1247 MT |
1243 | } |
1244 | ||
1245 | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, | |
1246 | bool mask) | |
1247 | { | |
1248 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 1249 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1250 | assert(n->vhost_started); |
b356f76d | 1251 | vhost_net_virtqueue_mask(tap_get_vhost_net(nc->peer), |
f56a1247 MT |
1252 | vdev, idx, mask); |
1253 | } | |
1254 | ||
f0c07c7c | 1255 | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
14f9b664 | 1256 | virtio_net_conf *net, uint32_t host_features) |
fbe78f4f AL |
1257 | { |
1258 | VirtIONet *n; | |
14f9b664 JL |
1259 | int i, config_size = 0; |
1260 | ||
1261 | for (i = 0; feature_sizes[i].flags != 0; i++) { | |
1262 | if (host_features & feature_sizes[i].flags) { | |
1263 | config_size = MAX(feature_sizes[i].end, config_size); | |
1264 | } | |
1265 | } | |
fbe78f4f | 1266 | |
53c25cea | 1267 | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, |
14f9b664 | 1268 | config_size, sizeof(VirtIONet)); |
fbe78f4f | 1269 | |
14f9b664 | 1270 | n->config_size = config_size; |
0f03eca6 AL |
1271 | n->vdev.get_config = virtio_net_get_config; |
1272 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
1273 | n->vdev.get_features = virtio_net_get_features; |
1274 | n->vdev.set_features = virtio_net_set_features; | |
8eca6b1b | 1275 | n->vdev.bad_features = virtio_net_bad_features; |
002437cd | 1276 | n->vdev.reset = virtio_net_reset; |
9bc6304c | 1277 | n->vdev.set_status = virtio_net_set_status; |
f56a1247 MT |
1278 | n->vdev.guest_notifier_mask = virtio_net_guest_notifier_mask; |
1279 | n->vdev.guest_notifier_pending = virtio_net_guest_notifier_pending; | |
f6b26cf2 JW |
1280 | n->max_queues = MAX(conf->queues, 1); |
1281 | n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); | |
fed699f9 | 1282 | n->vqs[0].rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
fed699f9 JW |
1283 | n->curr_queues = 1; |
1284 | n->vqs[0].n = n; | |
1285 | n->tx_timeout = net->txtimer; | |
a697a334 AW |
1286 | |
1287 | if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { | |
e7b43f7e SH |
1288 | error_report("virtio-net: " |
1289 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
1290 | net->tx); | |
1291 | error_report("Defaulting to \"bh\""); | |
a697a334 AW |
1292 | } |
1293 | ||
1294 | if (net->tx && !strcmp(net->tx, "timer")) { | |
fed699f9 JW |
1295 | n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, |
1296 | virtio_net_handle_tx_timer); | |
1297 | n->vqs[0].tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer, | |
1298 | &n->vqs[0]); | |
a697a334 | 1299 | } else { |
fed699f9 JW |
1300 | n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, |
1301 | virtio_net_handle_tx_bh); | |
1302 | n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); | |
a697a334 | 1303 | } |
4ffb17f5 | 1304 | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); |
97b15621 | 1305 | qemu_macaddr_default_if_unset(&conf->macaddr); |
3cbe04c4 | 1306 | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
554c97dd | 1307 | n->status = VIRTIO_NET_S_LINK_UP; |
fbe78f4f | 1308 | |
f79f2bfc | 1309 | n->nic = qemu_new_nic(&net_virtio_info, conf, object_get_typename(OBJECT(dev)), dev->id, n); |
6e371ab8 MT |
1310 | peer_test_vnet_hdr(n); |
1311 | if (peer_has_vnet_hdr(n)) { | |
fed699f9 JW |
1312 | for (i = 0; i < n->max_queues; i++) { |
1313 | tap_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); | |
1314 | } | |
6e371ab8 MT |
1315 | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
1316 | } else { | |
1317 | n->host_hdr_len = 0; | |
1318 | } | |
eb6b6c12 | 1319 | |
b356f76d | 1320 | qemu_format_nic_info_str(qemu_get_queue(n->nic), conf->macaddr.a); |
96d5e201 | 1321 | |
fed699f9 | 1322 | n->vqs[0].tx_waiting = 0; |
e3f30488 | 1323 | n->tx_burst = net->txburst; |
ff3a8066 | 1324 | virtio_net_set_mrg_rx_bufs(n, 0); |
002437cd | 1325 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 1326 | |
7267c094 | 1327 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 1328 | |
7267c094 | 1329 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 1330 | |
01657c86 AW |
1331 | n->qdev = dev; |
1332 | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, | |
fbe78f4f | 1333 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 1334 | |
1ca4d09a GN |
1335 | add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0"); |
1336 | ||
53c25cea | 1337 | return &n->vdev; |
cf21e106 | 1338 | } |
97b15621 GH |
1339 | |
1340 | void virtio_net_exit(VirtIODevice *vdev) | |
1341 | { | |
1342 | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); | |
fed699f9 | 1343 | int i; |
9bc6304c | 1344 | |
afbaa7b4 MT |
1345 | /* This will stop vhost backend if appropriate. */ |
1346 | virtio_net_set_status(vdev, 0); | |
97b15621 | 1347 | |
01657c86 | 1348 | unregister_savevm(n->qdev, "virtio-net", n); |
97b15621 | 1349 | |
7267c094 AL |
1350 | g_free(n->mac_table.macs); |
1351 | g_free(n->vlans); | |
97b15621 | 1352 | |
fed699f9 JW |
1353 | for (i = 0; i < n->max_queues; i++) { |
1354 | VirtIONetQueue *q = &n->vqs[i]; | |
1355 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
1356 | ||
1357 | qemu_purge_queued_packets(nc); | |
1358 | ||
1359 | if (q->tx_timer) { | |
1360 | qemu_del_timer(q->tx_timer); | |
1361 | qemu_free_timer(q->tx_timer); | |
1362 | } else { | |
1363 | qemu_bh_delete(q->tx_bh); | |
1364 | } | |
a697a334 | 1365 | } |
97b15621 | 1366 | |
f6b26cf2 | 1367 | g_free(n->vqs); |
948ecf21 | 1368 | qemu_del_nic(n->nic); |
b52dfd71 | 1369 | virtio_cleanup(&n->vdev); |
97b15621 | 1370 | } |