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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" |
fbe78f4f | 15 | #include "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" | |
fbe78f4f | 21 | #include "virtio-net.h" |
9bc6304c | 22 | #include "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 | |
0c87e93e JW |
29 | typedef struct VirtIONetQueue { |
30 | VirtQueue *rx_vq; | |
31 | VirtQueue *tx_vq; | |
32 | QEMUTimer *tx_timer; | |
33 | QEMUBH *tx_bh; | |
34 | int tx_waiting; | |
35 | struct { | |
36 | VirtQueueElement elem; | |
37 | ssize_t len; | |
38 | } async_tx; | |
39 | struct VirtIONet *n; | |
40 | } VirtIONetQueue; | |
41 | ||
fbe78f4f AL |
42 | typedef struct VirtIONet |
43 | { | |
44 | VirtIODevice vdev; | |
79674068 | 45 | uint8_t mac[ETH_ALEN]; |
554c97dd | 46 | uint16_t status; |
fed699f9 | 47 | VirtIONetQueue vqs[MAX_QUEUE_NUM]; |
3d11d36c | 48 | VirtQueue *ctrl_vq; |
eb6b6c12 | 49 | NICState *nic; |
f0c07c7c | 50 | uint32_t tx_timeout; |
e3f30488 | 51 | int32_t tx_burst; |
3a330134 | 52 | uint32_t has_vnet_hdr; |
e35e23f6 MT |
53 | size_t host_hdr_len; |
54 | size_t guest_hdr_len; | |
0ce0e8f4 | 55 | uint8_t has_ufo; |
fbe78f4f | 56 | int mergeable_rx_bufs; |
f10c592e AW |
57 | uint8_t promisc; |
58 | uint8_t allmulti; | |
015cb166 AW |
59 | uint8_t alluni; |
60 | uint8_t nomulti; | |
61 | uint8_t nouni; | |
62 | uint8_t nobcast; | |
9bc6304c | 63 | uint8_t vhost_started; |
b6503ed9 AL |
64 | struct { |
65 | int in_use; | |
2d9aba39 | 66 | int first_multi; |
8fd2a2f1 AW |
67 | uint8_t multi_overflow; |
68 | uint8_t uni_overflow; | |
b6503ed9 AL |
69 | uint8_t *macs; |
70 | } mac_table; | |
f21c0ed9 | 71 | uint32_t *vlans; |
01657c86 | 72 | DeviceState *qdev; |
fed699f9 JW |
73 | int multiqueue; |
74 | uint16_t max_queues; | |
75 | uint16_t curr_queues; | |
fbe78f4f AL |
76 | } VirtIONet; |
77 | ||
fed699f9 | 78 | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) |
0c87e93e JW |
79 | { |
80 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
81 | ||
fed699f9 | 82 | return &n->vqs[nc->queue_index]; |
0c87e93e | 83 | } |
fed699f9 JW |
84 | |
85 | static int vq2q(int queue_index) | |
86 | { | |
87 | return queue_index / 2; | |
88 | } | |
89 | ||
fbe78f4f AL |
90 | /* TODO |
91 | * - we could suppress RX interrupt if we were so inclined. | |
92 | */ | |
93 | ||
94 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
95 | { | |
96 | return (VirtIONet *)vdev; | |
97 | } | |
98 | ||
0f03eca6 | 99 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
100 | { |
101 | VirtIONet *n = to_virtio_net(vdev); | |
102 | struct virtio_net_config netcfg; | |
103 | ||
b46d97f2 | 104 | stw_p(&netcfg.status, n->status); |
fed699f9 | 105 | stw_p(&netcfg.max_virtqueue_pairs, n->max_queues); |
79674068 | 106 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
fbe78f4f AL |
107 | memcpy(config, &netcfg, sizeof(netcfg)); |
108 | } | |
109 | ||
0f03eca6 AL |
110 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
111 | { | |
112 | VirtIONet *n = to_virtio_net(vdev); | |
113 | struct virtio_net_config netcfg; | |
114 | ||
115 | memcpy(&netcfg, config, sizeof(netcfg)); | |
116 | ||
c1943a3f AK |
117 | if (!(n->vdev.guest_features >> VIRTIO_NET_F_CTRL_MAC_ADDR & 1) && |
118 | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { | |
79674068 | 119 | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
b356f76d | 120 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
0f03eca6 AL |
121 | } |
122 | } | |
123 | ||
783e7706 MT |
124 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
125 | { | |
126 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && | |
85cf2a8d | 127 | (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
783e7706 MT |
128 | } |
129 | ||
130 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) | |
afbaa7b4 | 131 | { |
b356f76d | 132 | NetClientState *nc = qemu_get_queue(n->nic); |
fed699f9 | 133 | int queues = n->multiqueue ? n->max_queues : 1; |
b356f76d JW |
134 | |
135 | if (!nc->peer) { | |
afbaa7b4 MT |
136 | return; |
137 | } | |
b356f76d | 138 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
afbaa7b4 MT |
139 | return; |
140 | } | |
141 | ||
b356f76d | 142 | if (!tap_get_vhost_net(nc->peer)) { |
afbaa7b4 MT |
143 | return; |
144 | } | |
fed699f9 | 145 | |
32993698 | 146 | if (!!n->vhost_started == virtio_net_started(n, status) && |
b356f76d | 147 | !nc->peer->link_down) { |
afbaa7b4 MT |
148 | return; |
149 | } | |
150 | if (!n->vhost_started) { | |
5430a28f | 151 | int r; |
b356f76d | 152 | if (!vhost_net_query(tap_get_vhost_net(nc->peer), &n->vdev)) { |
5430a28f | 153 | return; |
154 | } | |
1830b80f | 155 | n->vhost_started = 1; |
fed699f9 | 156 | r = vhost_net_start(&n->vdev, n->nic->ncs, queues); |
afbaa7b4 | 157 | if (r < 0) { |
e7b43f7e SH |
158 | error_report("unable to start vhost net: %d: " |
159 | "falling back on userspace virtio", -r); | |
1830b80f | 160 | n->vhost_started = 0; |
afbaa7b4 MT |
161 | } |
162 | } else { | |
fed699f9 | 163 | vhost_net_stop(&n->vdev, n->nic->ncs, queues); |
afbaa7b4 MT |
164 | n->vhost_started = 0; |
165 | } | |
166 | } | |
167 | ||
783e7706 MT |
168 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
169 | { | |
170 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 JW |
171 | VirtIONetQueue *q; |
172 | int i; | |
173 | uint8_t queue_status; | |
783e7706 MT |
174 | |
175 | virtio_net_vhost_status(n, status); | |
176 | ||
fed699f9 JW |
177 | for (i = 0; i < n->max_queues; i++) { |
178 | q = &n->vqs[i]; | |
783e7706 | 179 | |
fed699f9 JW |
180 | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
181 | queue_status = 0; | |
783e7706 | 182 | } else { |
fed699f9 | 183 | queue_status = status; |
783e7706 | 184 | } |
fed699f9 JW |
185 | |
186 | if (!q->tx_waiting) { | |
187 | continue; | |
188 | } | |
189 | ||
190 | if (virtio_net_started(n, queue_status) && !n->vhost_started) { | |
191 | if (q->tx_timer) { | |
192 | qemu_mod_timer(q->tx_timer, | |
193 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); | |
194 | } else { | |
195 | qemu_bh_schedule(q->tx_bh); | |
196 | } | |
783e7706 | 197 | } else { |
fed699f9 JW |
198 | if (q->tx_timer) { |
199 | qemu_del_timer(q->tx_timer); | |
200 | } else { | |
201 | qemu_bh_cancel(q->tx_bh); | |
202 | } | |
783e7706 MT |
203 | } |
204 | } | |
205 | } | |
206 | ||
4e68f7a0 | 207 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 208 | { |
cc1f0f45 | 209 | VirtIONet *n = qemu_get_nic_opaque(nc); |
554c97dd AL |
210 | uint16_t old_status = n->status; |
211 | ||
eb6b6c12 | 212 | if (nc->link_down) |
554c97dd AL |
213 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
214 | else | |
215 | n->status |= VIRTIO_NET_S_LINK_UP; | |
216 | ||
217 | if (n->status != old_status) | |
218 | virtio_notify_config(&n->vdev); | |
afbaa7b4 MT |
219 | |
220 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
554c97dd AL |
221 | } |
222 | ||
002437cd AL |
223 | static void virtio_net_reset(VirtIODevice *vdev) |
224 | { | |
225 | VirtIONet *n = to_virtio_net(vdev); | |
226 | ||
227 | /* Reset back to compatibility mode */ | |
228 | n->promisc = 1; | |
229 | n->allmulti = 0; | |
015cb166 AW |
230 | n->alluni = 0; |
231 | n->nomulti = 0; | |
232 | n->nouni = 0; | |
233 | n->nobcast = 0; | |
fed699f9 JW |
234 | /* multiqueue is disabled by default */ |
235 | n->curr_queues = 1; | |
b6503ed9 | 236 | |
f21c0ed9 | 237 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 238 | n->mac_table.in_use = 0; |
2d9aba39 | 239 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
240 | n->mac_table.multi_overflow = 0; |
241 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 242 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
41dc8a67 | 243 | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
f21c0ed9 | 244 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
245 | } |
246 | ||
6e371ab8 | 247 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 248 | { |
b356f76d JW |
249 | NetClientState *nc = qemu_get_queue(n->nic); |
250 | if (!nc->peer) { | |
6e371ab8 | 251 | return; |
b356f76d | 252 | } |
3a330134 | 253 | |
b356f76d | 254 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
6e371ab8 | 255 | return; |
b356f76d | 256 | } |
3a330134 | 257 | |
b356f76d | 258 | n->has_vnet_hdr = tap_has_vnet_hdr(nc->peer); |
6e371ab8 | 259 | } |
3a330134 | 260 | |
6e371ab8 MT |
261 | static int peer_has_vnet_hdr(VirtIONet *n) |
262 | { | |
3a330134 MM |
263 | return n->has_vnet_hdr; |
264 | } | |
265 | ||
0ce0e8f4 MM |
266 | static int peer_has_ufo(VirtIONet *n) |
267 | { | |
268 | if (!peer_has_vnet_hdr(n)) | |
269 | return 0; | |
270 | ||
b356f76d | 271 | n->has_ufo = tap_has_ufo(qemu_get_queue(n->nic)->peer); |
0ce0e8f4 MM |
272 | |
273 | return n->has_ufo; | |
274 | } | |
275 | ||
ff3a8066 MT |
276 | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) |
277 | { | |
fed699f9 JW |
278 | int i; |
279 | NetClientState *nc; | |
280 | ||
ff3a8066 MT |
281 | n->mergeable_rx_bufs = mergeable_rx_bufs; |
282 | ||
283 | n->guest_hdr_len = n->mergeable_rx_bufs ? | |
284 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
285 | ||
fed699f9 JW |
286 | for (i = 0; i < n->max_queues; i++) { |
287 | nc = qemu_get_subqueue(n->nic, i); | |
288 | ||
289 | if (peer_has_vnet_hdr(n) && | |
290 | tap_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { | |
291 | tap_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); | |
292 | n->host_hdr_len = n->guest_hdr_len; | |
293 | } | |
ff3a8066 MT |
294 | } |
295 | } | |
296 | ||
fed699f9 JW |
297 | static int peer_attach(VirtIONet *n, int index) |
298 | { | |
299 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
300 | ||
301 | if (!nc->peer) { | |
302 | return 0; | |
303 | } | |
304 | ||
305 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
306 | return 0; | |
307 | } | |
308 | ||
309 | return tap_enable(nc->peer); | |
310 | } | |
311 | ||
312 | static int peer_detach(VirtIONet *n, int index) | |
313 | { | |
314 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
315 | ||
316 | if (!nc->peer) { | |
317 | return 0; | |
318 | } | |
319 | ||
320 | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
321 | return 0; | |
322 | } | |
323 | ||
324 | return tap_disable(nc->peer); | |
325 | } | |
326 | ||
327 | static void virtio_net_set_queues(VirtIONet *n) | |
328 | { | |
329 | int i; | |
330 | ||
331 | for (i = 0; i < n->max_queues; i++) { | |
332 | if (i < n->curr_queues) { | |
333 | assert(!peer_attach(n, i)); | |
334 | } else { | |
335 | assert(!peer_detach(n, i)); | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
340 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl); | |
341 | ||
8172539d | 342 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 343 | { |
3a330134 | 344 | VirtIONet *n = to_virtio_net(vdev); |
b356f76d | 345 | NetClientState *nc = qemu_get_queue(n->nic); |
fbe78f4f | 346 | |
c9f79a3f MT |
347 | features |= (1 << VIRTIO_NET_F_MAC); |
348 | ||
6e371ab8 | 349 | if (!peer_has_vnet_hdr(n)) { |
8172539d MT |
350 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); |
351 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
352 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
353 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
354 | ||
355 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
356 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
357 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
358 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
359 | } | |
3a330134 | 360 | |
8172539d MT |
361 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
362 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
363 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
364 | } |
365 | ||
b356f76d | 366 | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
9bc6304c MT |
367 | return features; |
368 | } | |
b356f76d | 369 | if (!tap_get_vhost_net(nc->peer)) { |
9bc6304c MT |
370 | return features; |
371 | } | |
b356f76d | 372 | return vhost_net_get_features(tap_get_vhost_net(nc->peer), features); |
fbe78f4f AL |
373 | } |
374 | ||
8eca6b1b AL |
375 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
376 | { | |
377 | uint32_t features = 0; | |
378 | ||
379 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
380 | * but also these: */ | |
381 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
382 | features |= (1 << VIRTIO_NET_F_CSUM); |
383 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
384 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
385 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 386 | |
8172539d | 387 | return features; |
8eca6b1b AL |
388 | } |
389 | ||
fbe78f4f AL |
390 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
391 | { | |
392 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 JW |
393 | int i; |
394 | ||
395 | virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ)), | |
396 | !!(features & (1 << VIRTIO_NET_F_CTRL_VQ))); | |
fbe78f4f | 397 | |
ff3a8066 | 398 | virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF))); |
f5436dd9 MM |
399 | |
400 | if (n->has_vnet_hdr) { | |
fed699f9 | 401 | tap_set_offload(qemu_get_subqueue(n->nic, 0)->peer, |
f5436dd9 MM |
402 | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
403 | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
404 | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
6c9f58ba SS |
405 | (features >> VIRTIO_NET_F_GUEST_ECN) & 1, |
406 | (features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
f5436dd9 | 407 | } |
fed699f9 JW |
408 | |
409 | for (i = 0; i < n->max_queues; i++) { | |
410 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
411 | ||
412 | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { | |
413 | continue; | |
414 | } | |
415 | if (!tap_get_vhost_net(nc->peer)) { | |
416 | continue; | |
417 | } | |
418 | vhost_net_ack_features(tap_get_vhost_net(nc->peer), features); | |
dc14a397 | 419 | } |
fbe78f4f AL |
420 | } |
421 | ||
002437cd | 422 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 423 | struct iovec *iov, unsigned int iov_cnt) |
002437cd AL |
424 | { |
425 | uint8_t on; | |
921ac5d0 | 426 | size_t s; |
002437cd | 427 | |
921ac5d0 MT |
428 | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
429 | if (s != sizeof(on)) { | |
430 | return VIRTIO_NET_ERR; | |
002437cd AL |
431 | } |
432 | ||
dd23454b | 433 | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { |
002437cd | 434 | n->promisc = on; |
dd23454b | 435 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
002437cd | 436 | n->allmulti = on; |
dd23454b | 437 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
015cb166 | 438 | n->alluni = on; |
dd23454b | 439 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
015cb166 | 440 | n->nomulti = on; |
dd23454b | 441 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
015cb166 | 442 | n->nouni = on; |
dd23454b | 443 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
015cb166 | 444 | n->nobcast = on; |
921ac5d0 | 445 | } else { |
002437cd | 446 | return VIRTIO_NET_ERR; |
921ac5d0 | 447 | } |
002437cd AL |
448 | |
449 | return VIRTIO_NET_OK; | |
450 | } | |
451 | ||
b6503ed9 | 452 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 453 | struct iovec *iov, unsigned int iov_cnt) |
b6503ed9 AL |
454 | { |
455 | struct virtio_net_ctrl_mac mac_data; | |
921ac5d0 | 456 | size_t s; |
b6503ed9 | 457 | |
c1943a3f AK |
458 | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { |
459 | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { | |
460 | return VIRTIO_NET_ERR; | |
461 | } | |
462 | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); | |
463 | assert(s == sizeof(n->mac)); | |
b356f76d | 464 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
c1943a3f AK |
465 | return VIRTIO_NET_OK; |
466 | } | |
467 | ||
921ac5d0 | 468 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { |
b6503ed9 | 469 | return VIRTIO_NET_ERR; |
921ac5d0 | 470 | } |
b6503ed9 AL |
471 | |
472 | n->mac_table.in_use = 0; | |
2d9aba39 | 473 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
474 | n->mac_table.uni_overflow = 0; |
475 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
476 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
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 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 485 | |
921ac5d0 | 486 | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { |
b6503ed9 | 487 | return VIRTIO_NET_ERR; |
921ac5d0 | 488 | } |
b6503ed9 AL |
489 | |
490 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
921ac5d0 MT |
491 | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs, |
492 | mac_data.entries * ETH_ALEN); | |
493 | if (s != mac_data.entries * ETH_ALEN) { | |
494 | return VIRTIO_NET_ERR; | |
495 | } | |
b6503ed9 AL |
496 | n->mac_table.in_use += mac_data.entries; |
497 | } else { | |
8fd2a2f1 | 498 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
499 | } |
500 | ||
921ac5d0 MT |
501 | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
502 | ||
2d9aba39 AW |
503 | n->mac_table.first_multi = n->mac_table.in_use; |
504 | ||
921ac5d0 MT |
505 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
506 | sizeof(mac_data.entries)); | |
507 | mac_data.entries = ldl_p(&mac_data.entries); | |
508 | if (s != sizeof(mac_data.entries)) { | |
509 | return VIRTIO_NET_ERR; | |
510 | } | |
511 | ||
512 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 513 | |
921ac5d0 | 514 | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { |
b6503ed9 | 515 | return VIRTIO_NET_ERR; |
921ac5d0 | 516 | } |
b6503ed9 | 517 | |
921ac5d0 MT |
518 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { |
519 | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs, | |
520 | mac_data.entries * ETH_ALEN); | |
521 | if (s != mac_data.entries * ETH_ALEN) { | |
522 | return VIRTIO_NET_ERR; | |
8fd2a2f1 | 523 | } |
921ac5d0 MT |
524 | n->mac_table.in_use += mac_data.entries; |
525 | } else { | |
526 | n->mac_table.multi_overflow = 1; | |
b6503ed9 AL |
527 | } |
528 | ||
529 | return VIRTIO_NET_OK; | |
530 | } | |
531 | ||
f21c0ed9 | 532 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 533 | struct iovec *iov, unsigned int iov_cnt) |
f21c0ed9 AL |
534 | { |
535 | uint16_t vid; | |
921ac5d0 | 536 | size_t s; |
f21c0ed9 | 537 | |
921ac5d0 MT |
538 | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
539 | vid = lduw_p(&vid); | |
540 | if (s != sizeof(vid)) { | |
f21c0ed9 AL |
541 | return VIRTIO_NET_ERR; |
542 | } | |
543 | ||
f21c0ed9 AL |
544 | if (vid >= MAX_VLAN) |
545 | return VIRTIO_NET_ERR; | |
546 | ||
547 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
548 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
549 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
550 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
551 | else | |
552 | return VIRTIO_NET_ERR; | |
553 | ||
554 | return VIRTIO_NET_OK; | |
555 | } | |
556 | ||
fed699f9 JW |
557 | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
558 | VirtQueueElement *elem) | |
559 | { | |
560 | struct virtio_net_ctrl_mq s; | |
561 | ||
562 | if (elem->out_num != 2 || | |
563 | elem->out_sg[1].iov_len != sizeof(struct virtio_net_ctrl_mq)) { | |
564 | error_report("virtio-net ctrl invalid steering command"); | |
565 | return VIRTIO_NET_ERR; | |
566 | } | |
567 | ||
568 | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { | |
569 | return VIRTIO_NET_ERR; | |
570 | } | |
571 | ||
572 | memcpy(&s, elem->out_sg[1].iov_base, sizeof(struct virtio_net_ctrl_mq)); | |
573 | ||
574 | if (s.virtqueue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || | |
575 | s.virtqueue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
576 | s.virtqueue_pairs > n->max_queues || | |
577 | !n->multiqueue) { | |
578 | return VIRTIO_NET_ERR; | |
579 | } | |
580 | ||
581 | n->curr_queues = s.virtqueue_pairs; | |
582 | /* stop the backend before changing the number of queues to avoid handling a | |
583 | * disabled queue */ | |
584 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
585 | virtio_net_set_queues(n); | |
586 | ||
587 | return VIRTIO_NET_OK; | |
588 | } | |
3d11d36c AL |
589 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
590 | { | |
002437cd | 591 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
592 | struct virtio_net_ctrl_hdr ctrl; |
593 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
594 | VirtQueueElement elem; | |
921ac5d0 MT |
595 | size_t s; |
596 | struct iovec *iov; | |
597 | unsigned int iov_cnt; | |
3d11d36c AL |
598 | |
599 | while (virtqueue_pop(vq, &elem)) { | |
921ac5d0 MT |
600 | if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || |
601 | iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { | |
e7b43f7e | 602 | error_report("virtio-net ctrl missing headers"); |
3d11d36c AL |
603 | exit(1); |
604 | } | |
605 | ||
921ac5d0 MT |
606 | iov = elem.out_sg; |
607 | iov_cnt = elem.out_num; | |
608 | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); | |
609 | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); | |
610 | if (s != sizeof(ctrl)) { | |
611 | status = VIRTIO_NET_ERR; | |
dd23454b | 612 | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
921ac5d0 MT |
613 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
614 | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { | |
615 | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); | |
616 | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { | |
617 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); | |
fed699f9 JW |
618 | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
619 | status = virtio_net_handle_mq(n, ctrl.cmd, &elem); | |
3d11d36c AL |
620 | } |
621 | ||
921ac5d0 MT |
622 | s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); |
623 | assert(s == sizeof(status)); | |
3d11d36c AL |
624 | |
625 | virtqueue_push(vq, &elem, sizeof(status)); | |
626 | virtio_notify(vdev, vq); | |
627 | } | |
628 | } | |
629 | ||
fbe78f4f AL |
630 | /* RX */ |
631 | ||
632 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
633 | { | |
8aeff62d | 634 | VirtIONet *n = to_virtio_net(vdev); |
fed699f9 | 635 | int queue_index = vq2q(virtio_get_queue_index(vq)); |
8aeff62d | 636 | |
fed699f9 | 637 | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
fbe78f4f AL |
638 | } |
639 | ||
4e68f7a0 | 640 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 641 | { |
cc1f0f45 | 642 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 643 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
0c87e93e | 644 | |
85cf2a8d | 645 | if (!n->vdev.vm_running) { |
95477323 MT |
646 | return 0; |
647 | } | |
cdd5cc12 | 648 | |
fed699f9 JW |
649 | if (nc->queue_index >= n->curr_queues) { |
650 | return 0; | |
651 | } | |
652 | ||
0c87e93e JW |
653 | if (!virtio_queue_ready(q->rx_vq) || |
654 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { | |
fbe78f4f | 655 | return 0; |
0c87e93e | 656 | } |
fbe78f4f | 657 | |
cdd5cc12 MM |
658 | return 1; |
659 | } | |
660 | ||
0c87e93e | 661 | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
cdd5cc12 | 662 | { |
0c87e93e JW |
663 | VirtIONet *n = q->n; |
664 | if (virtio_queue_empty(q->rx_vq) || | |
fbe78f4f | 665 | (n->mergeable_rx_bufs && |
0c87e93e JW |
666 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
667 | virtio_queue_set_notification(q->rx_vq, 1); | |
06b12970 TL |
668 | |
669 | /* To avoid a race condition where the guest has made some buffers | |
670 | * available after the above check but before notification was | |
671 | * enabled, check for available buffers again. | |
672 | */ | |
0c87e93e | 673 | if (virtio_queue_empty(q->rx_vq) || |
06b12970 | 674 | (n->mergeable_rx_bufs && |
0c87e93e | 675 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
06b12970 | 676 | return 0; |
0c87e93e | 677 | } |
fbe78f4f AL |
678 | } |
679 | ||
0c87e93e | 680 | virtio_queue_set_notification(q->rx_vq, 0); |
fbe78f4f AL |
681 | return 1; |
682 | } | |
683 | ||
1d41b0c1 AL |
684 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
685 | * it never finds out that the packets don't have valid checksums. This | |
686 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
687 | * fix this with Xen but it hasn't appeared in an upstream release of | |
688 | * dhclient yet. | |
689 | * | |
690 | * To avoid breaking existing guests, we catch udp packets and add | |
691 | * checksums. This is terrible but it's better than hacking the guest | |
692 | * kernels. | |
693 | * | |
694 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
695 | * we should provide a mechanism to disable it to avoid polluting the host | |
696 | * cache. | |
697 | */ | |
698 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 699 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
700 | { |
701 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
702 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
703 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
704 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
705 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 706 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
707 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
708 | } | |
709 | } | |
710 | ||
280598b7 MT |
711 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
712 | const void *buf, size_t size) | |
fbe78f4f | 713 | { |
3a330134 | 714 | if (n->has_vnet_hdr) { |
22cc84db MT |
715 | /* FIXME this cast is evil */ |
716 | void *wbuf = (void *)buf; | |
280598b7 MT |
717 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
718 | size - n->host_hdr_len); | |
719 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); | |
22cc84db MT |
720 | } else { |
721 | struct virtio_net_hdr hdr = { | |
722 | .flags = 0, | |
723 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
724 | }; | |
725 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 726 | } |
fbe78f4f AL |
727 | } |
728 | ||
3831ab20 AL |
729 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
730 | { | |
731 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 732 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 733 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 734 | int i; |
3831ab20 AL |
735 | |
736 | if (n->promisc) | |
737 | return 1; | |
738 | ||
e043ebc6 | 739 | ptr += n->host_hdr_len; |
3a330134 | 740 | |
f21c0ed9 AL |
741 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
742 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
743 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
744 | return 0; | |
745 | } | |
746 | ||
bbe2f399 AW |
747 | if (ptr[0] & 1) { // multicast |
748 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
749 | return !n->nobcast; |
750 | } else if (n->nomulti) { | |
751 | return 0; | |
8fd2a2f1 | 752 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
753 | return 1; |
754 | } | |
2d9aba39 AW |
755 | |
756 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
757 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
758 | return 1; | |
759 | } | |
760 | } | |
bbe2f399 | 761 | } else { // unicast |
015cb166 AW |
762 | if (n->nouni) { |
763 | return 0; | |
764 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
765 | return 1; |
766 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
767 | return 1; |
768 | } | |
3831ab20 | 769 | |
2d9aba39 AW |
770 | for (i = 0; i < n->mac_table.first_multi; i++) { |
771 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
772 | return 1; | |
773 | } | |
774 | } | |
b6503ed9 AL |
775 | } |
776 | ||
3831ab20 AL |
777 | return 0; |
778 | } | |
779 | ||
4e68f7a0 | 780 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 781 | { |
cc1f0f45 | 782 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 783 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
63c58728 MT |
784 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
785 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
786 | unsigned mhdr_cnt = 0; | |
22cc84db | 787 | size_t offset, i, guest_offset; |
fbe78f4f | 788 | |
fed699f9 | 789 | if (!virtio_net_can_receive(nc)) { |
cdd5cc12 | 790 | return -1; |
b356f76d | 791 | } |
cdd5cc12 | 792 | |
940cda94 | 793 | /* hdr_len refers to the header we supply to the guest */ |
0c87e93e | 794 | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { |
8aeff62d | 795 | return 0; |
0c87e93e | 796 | } |
fbe78f4f | 797 | |
3831ab20 | 798 | if (!receive_filter(n, buf, size)) |
4f1c942b | 799 | return size; |
3831ab20 | 800 | |
fbe78f4f AL |
801 | offset = i = 0; |
802 | ||
803 | while (offset < size) { | |
804 | VirtQueueElement elem; | |
805 | int len, total; | |
22cc84db | 806 | const struct iovec *sg = elem.in_sg; |
fbe78f4f | 807 | |
22c253d9 | 808 | total = 0; |
fbe78f4f | 809 | |
0c87e93e | 810 | if (virtqueue_pop(q->rx_vq, &elem) == 0) { |
fbe78f4f | 811 | if (i == 0) |
4f1c942b | 812 | return -1; |
e7b43f7e | 813 | error_report("virtio-net unexpected empty queue: " |
279a4253 | 814 | "i %zd mergeable %d offset %zd, size %zd, " |
e7b43f7e | 815 | "guest hdr len %zd, host hdr len %zd guest features 0x%x", |
279a4253 | 816 | i, n->mergeable_rx_bufs, offset, size, |
e35e23f6 | 817 | n->guest_hdr_len, n->host_hdr_len, n->vdev.guest_features); |
fbe78f4f AL |
818 | exit(1); |
819 | } | |
820 | ||
821 | if (elem.in_num < 1) { | |
e7b43f7e | 822 | error_report("virtio-net receive queue contains no in buffers"); |
fbe78f4f AL |
823 | exit(1); |
824 | } | |
825 | ||
fbe78f4f | 826 | if (i == 0) { |
c8d28e7e | 827 | assert(offset == 0); |
63c58728 MT |
828 | if (n->mergeable_rx_bufs) { |
829 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
830 | sg, elem.in_num, | |
831 | offsetof(typeof(mhdr), num_buffers), | |
832 | sizeof(mhdr.num_buffers)); | |
833 | } | |
fbe78f4f | 834 | |
c8d28e7e MT |
835 | receive_header(n, sg, elem.in_num, buf, size); |
836 | offset = n->host_hdr_len; | |
e35e23f6 | 837 | total += n->guest_hdr_len; |
22cc84db MT |
838 | guest_offset = n->guest_hdr_len; |
839 | } else { | |
840 | guest_offset = 0; | |
fbe78f4f AL |
841 | } |
842 | ||
843 | /* copy in packet. ugh */ | |
22cc84db | 844 | len = iov_from_buf(sg, elem.in_num, guest_offset, |
dcf6f5e1 | 845 | buf + offset, size - offset); |
fbe78f4f | 846 | total += len; |
279a4253 MT |
847 | offset += len; |
848 | /* If buffers can't be merged, at this point we | |
849 | * must have consumed the complete packet. | |
850 | * Otherwise, drop it. */ | |
851 | if (!n->mergeable_rx_bufs && offset < size) { | |
852 | #if 0 | |
e7b43f7e SH |
853 | error_report("virtio-net truncated non-mergeable packet: " |
854 | "i %zd mergeable %d offset %zd, size %zd, " | |
855 | "guest hdr len %zd, host hdr len %zd", | |
856 | i, n->mergeable_rx_bufs, | |
e35e23f6 | 857 | offset, size, n->guest_hdr_len, n->host_hdr_len); |
279a4253 MT |
858 | #endif |
859 | return size; | |
860 | } | |
fbe78f4f AL |
861 | |
862 | /* signal other side */ | |
0c87e93e | 863 | virtqueue_fill(q->rx_vq, &elem, total, i++); |
fbe78f4f AL |
864 | } |
865 | ||
63c58728 MT |
866 | if (mhdr_cnt) { |
867 | stw_p(&mhdr.num_buffers, i); | |
868 | iov_from_buf(mhdr_sg, mhdr_cnt, | |
869 | 0, | |
870 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 871 | } |
fbe78f4f | 872 | |
0c87e93e JW |
873 | virtqueue_flush(q->rx_vq, i); |
874 | virtio_notify(&n->vdev, q->rx_vq); | |
4f1c942b MM |
875 | |
876 | return size; | |
fbe78f4f AL |
877 | } |
878 | ||
0c87e93e | 879 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q); |
6243375f | 880 | |
4e68f7a0 | 881 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 882 | { |
cc1f0f45 | 883 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 884 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
6243375f | 885 | |
0c87e93e JW |
886 | virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); |
887 | virtio_notify(&n->vdev, q->tx_vq); | |
6243375f | 888 | |
0c87e93e | 889 | q->async_tx.elem.out_num = q->async_tx.len = 0; |
6243375f | 890 | |
0c87e93e JW |
891 | virtio_queue_set_notification(q->tx_vq, 1); |
892 | virtio_net_flush_tx(q); | |
6243375f MM |
893 | } |
894 | ||
fbe78f4f | 895 | /* TX */ |
0c87e93e | 896 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q) |
fbe78f4f | 897 | { |
0c87e93e | 898 | VirtIONet *n = q->n; |
fbe78f4f | 899 | VirtQueueElement elem; |
e3f30488 | 900 | int32_t num_packets = 0; |
fed699f9 | 901 | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); |
e3f30488 AW |
902 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
903 | return num_packets; | |
904 | } | |
fbe78f4f | 905 | |
85cf2a8d | 906 | assert(n->vdev.vm_running); |
783e7706 | 907 | |
0c87e93e JW |
908 | if (q->async_tx.elem.out_num) { |
909 | virtio_queue_set_notification(q->tx_vq, 0); | |
e3f30488 | 910 | return num_packets; |
6243375f MM |
911 | } |
912 | ||
0c87e93e | 913 | while (virtqueue_pop(q->tx_vq, &elem)) { |
14761f9c | 914 | ssize_t ret, len; |
fbe78f4f AL |
915 | unsigned int out_num = elem.out_num; |
916 | struct iovec *out_sg = &elem.out_sg[0]; | |
14761f9c | 917 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; |
fbe78f4f | 918 | |
7b80d08e | 919 | if (out_num < 1) { |
e7b43f7e | 920 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
921 | exit(1); |
922 | } | |
923 | ||
14761f9c MT |
924 | /* |
925 | * If host wants to see the guest header as is, we can | |
926 | * pass it on unchanged. Otherwise, copy just the parts | |
927 | * that host is interested in. | |
928 | */ | |
929 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
930 | if (n->host_hdr_len != n->guest_hdr_len) { | |
931 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
932 | out_sg, out_num, | |
933 | 0, n->host_hdr_len); | |
934 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
935 | out_sg, out_num, | |
936 | n->guest_hdr_len, -1); | |
937 | out_num = sg_num; | |
938 | out_sg = sg; | |
fbe78f4f AL |
939 | } |
940 | ||
7b80d08e | 941 | len = n->guest_hdr_len; |
14761f9c | 942 | |
fed699f9 JW |
943 | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
944 | out_sg, out_num, virtio_net_tx_complete); | |
6243375f | 945 | if (ret == 0) { |
0c87e93e JW |
946 | virtio_queue_set_notification(q->tx_vq, 0); |
947 | q->async_tx.elem = elem; | |
948 | q->async_tx.len = len; | |
e3f30488 | 949 | return -EBUSY; |
6243375f MM |
950 | } |
951 | ||
952 | len += ret; | |
fbe78f4f | 953 | |
0c87e93e JW |
954 | virtqueue_push(q->tx_vq, &elem, 0); |
955 | virtio_notify(&n->vdev, q->tx_vq); | |
e3f30488 AW |
956 | |
957 | if (++num_packets >= n->tx_burst) { | |
958 | break; | |
959 | } | |
fbe78f4f | 960 | } |
e3f30488 | 961 | return num_packets; |
fbe78f4f AL |
962 | } |
963 | ||
a697a334 | 964 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f AL |
965 | { |
966 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 967 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
fbe78f4f | 968 | |
783e7706 | 969 | /* This happens when device was stopped but VCPU wasn't. */ |
85cf2a8d | 970 | if (!n->vdev.vm_running) { |
0c87e93e | 971 | q->tx_waiting = 1; |
783e7706 MT |
972 | return; |
973 | } | |
974 | ||
0c87e93e | 975 | if (q->tx_waiting) { |
fbe78f4f | 976 | virtio_queue_set_notification(vq, 1); |
0c87e93e JW |
977 | qemu_del_timer(q->tx_timer); |
978 | q->tx_waiting = 0; | |
979 | virtio_net_flush_tx(q); | |
fbe78f4f | 980 | } else { |
0c87e93e | 981 | qemu_mod_timer(q->tx_timer, |
74475455 | 982 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
0c87e93e | 983 | q->tx_waiting = 1; |
fbe78f4f AL |
984 | virtio_queue_set_notification(vq, 0); |
985 | } | |
986 | } | |
987 | ||
a697a334 AW |
988 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
989 | { | |
990 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 991 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
a697a334 | 992 | |
0c87e93e | 993 | if (unlikely(q->tx_waiting)) { |
a697a334 AW |
994 | return; |
995 | } | |
0c87e93e | 996 | q->tx_waiting = 1; |
783e7706 | 997 | /* This happens when device was stopped but VCPU wasn't. */ |
85cf2a8d | 998 | if (!n->vdev.vm_running) { |
783e7706 MT |
999 | return; |
1000 | } | |
a697a334 | 1001 | virtio_queue_set_notification(vq, 0); |
0c87e93e | 1002 | qemu_bh_schedule(q->tx_bh); |
a697a334 AW |
1003 | } |
1004 | ||
fbe78f4f AL |
1005 | static void virtio_net_tx_timer(void *opaque) |
1006 | { | |
0c87e93e JW |
1007 | VirtIONetQueue *q = opaque; |
1008 | VirtIONet *n = q->n; | |
85cf2a8d | 1009 | assert(n->vdev.vm_running); |
fbe78f4f | 1010 | |
0c87e93e | 1011 | q->tx_waiting = 0; |
fbe78f4f AL |
1012 | |
1013 | /* Just in case the driver is not ready on more */ | |
1014 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
1015 | return; | |
1016 | ||
0c87e93e JW |
1017 | virtio_queue_set_notification(q->tx_vq, 1); |
1018 | virtio_net_flush_tx(q); | |
fbe78f4f AL |
1019 | } |
1020 | ||
a697a334 AW |
1021 | static void virtio_net_tx_bh(void *opaque) |
1022 | { | |
0c87e93e JW |
1023 | VirtIONetQueue *q = opaque; |
1024 | VirtIONet *n = q->n; | |
a697a334 AW |
1025 | int32_t ret; |
1026 | ||
85cf2a8d | 1027 | assert(n->vdev.vm_running); |
783e7706 | 1028 | |
0c87e93e | 1029 | q->tx_waiting = 0; |
a697a334 AW |
1030 | |
1031 | /* Just in case the driver is not ready on more */ | |
1032 | if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))) | |
1033 | return; | |
1034 | ||
0c87e93e | 1035 | ret = virtio_net_flush_tx(q); |
a697a334 AW |
1036 | if (ret == -EBUSY) { |
1037 | return; /* Notification re-enable handled by tx_complete */ | |
1038 | } | |
1039 | ||
1040 | /* If we flush a full burst of packets, assume there are | |
1041 | * more coming and immediately reschedule */ | |
1042 | if (ret >= n->tx_burst) { | |
0c87e93e JW |
1043 | qemu_bh_schedule(q->tx_bh); |
1044 | q->tx_waiting = 1; | |
a697a334 AW |
1045 | return; |
1046 | } | |
1047 | ||
1048 | /* If less than a full burst, re-enable notification and flush | |
1049 | * anything that may have come in while we weren't looking. If | |
1050 | * we find something, assume the guest is still active and reschedule */ | |
0c87e93e JW |
1051 | virtio_queue_set_notification(q->tx_vq, 1); |
1052 | if (virtio_net_flush_tx(q) > 0) { | |
1053 | virtio_queue_set_notification(q->tx_vq, 0); | |
1054 | qemu_bh_schedule(q->tx_bh); | |
1055 | q->tx_waiting = 1; | |
a697a334 AW |
1056 | } |
1057 | } | |
1058 | ||
fed699f9 JW |
1059 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl) |
1060 | { | |
1061 | VirtIODevice *vdev = &n->vdev; | |
1062 | int i, max = multiqueue ? n->max_queues : 1; | |
1063 | ||
1064 | n->multiqueue = multiqueue; | |
1065 | ||
1066 | for (i = 2; i <= n->max_queues * 2 + 1; i++) { | |
1067 | virtio_del_queue(vdev, i); | |
1068 | } | |
1069 | ||
1070 | for (i = 1; i < max; i++) { | |
1071 | n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); | |
1072 | if (n->vqs[i].tx_timer) { | |
1073 | n->vqs[i].tx_vq = | |
1074 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); | |
1075 | n->vqs[i].tx_timer = qemu_new_timer_ns(vm_clock, | |
1076 | virtio_net_tx_timer, | |
1077 | &n->vqs[i]); | |
1078 | } else { | |
1079 | n->vqs[i].tx_vq = | |
1080 | virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); | |
1081 | n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); | |
1082 | } | |
1083 | ||
1084 | n->vqs[i].tx_waiting = 0; | |
1085 | n->vqs[i].n = n; | |
1086 | } | |
1087 | ||
1088 | if (ctrl) { | |
1089 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); | |
1090 | } | |
1091 | ||
1092 | virtio_net_set_queues(n); | |
1093 | } | |
1094 | ||
fbe78f4f AL |
1095 | static void virtio_net_save(QEMUFile *f, void *opaque) |
1096 | { | |
5f800801 | 1097 | int i; |
fbe78f4f AL |
1098 | VirtIONet *n = opaque; |
1099 | ||
afbaa7b4 MT |
1100 | /* At this point, backend must be stopped, otherwise |
1101 | * it might keep writing to memory. */ | |
1102 | assert(!n->vhost_started); | |
fbe78f4f AL |
1103 | virtio_save(&n->vdev, f); |
1104 | ||
79674068 | 1105 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1106 | qemu_put_be32(f, n->vqs[0].tx_waiting); |
e46cb38f | 1107 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 1108 | qemu_put_be16(f, n->status); |
f10c592e AW |
1109 | qemu_put_byte(f, n->promisc); |
1110 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
1111 | qemu_put_be32(f, n->mac_table.in_use); |
1112 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 1113 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 1114 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
1115 | qemu_put_byte(f, n->mac_table.multi_overflow); |
1116 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
1117 | qemu_put_byte(f, n->alluni); |
1118 | qemu_put_byte(f, n->nomulti); | |
1119 | qemu_put_byte(f, n->nouni); | |
1120 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 1121 | qemu_put_byte(f, n->has_ufo); |
5f800801 JW |
1122 | if (n->max_queues > 1) { |
1123 | qemu_put_be16(f, n->max_queues); | |
1124 | qemu_put_be16(f, n->curr_queues); | |
1125 | for (i = 1; i < n->curr_queues; i++) { | |
1126 | qemu_put_be32(f, n->vqs[i].tx_waiting); | |
1127 | } | |
1128 | } | |
fbe78f4f AL |
1129 | } |
1130 | ||
1131 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
1132 | { | |
1133 | VirtIONet *n = opaque; | |
5f800801 | 1134 | int ret, i, link_down; |
fbe78f4f | 1135 | |
9d6271b8 | 1136 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
1137 | return -EINVAL; |
1138 | ||
2a633c46 OW |
1139 | ret = virtio_load(&n->vdev, f); |
1140 | if (ret) { | |
1141 | return ret; | |
1142 | } | |
fbe78f4f | 1143 | |
79674068 | 1144 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
5f800801 | 1145 | n->vqs[0].tx_waiting = qemu_get_be32(f); |
ff3a8066 MT |
1146 | |
1147 | virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f)); | |
fbe78f4f | 1148 | |
9d6271b8 AL |
1149 | if (version_id >= 3) |
1150 | n->status = qemu_get_be16(f); | |
1151 | ||
002437cd | 1152 | if (version_id >= 4) { |
f10c592e AW |
1153 | if (version_id < 8) { |
1154 | n->promisc = qemu_get_be32(f); | |
1155 | n->allmulti = qemu_get_be32(f); | |
1156 | } else { | |
1157 | n->promisc = qemu_get_byte(f); | |
1158 | n->allmulti = qemu_get_byte(f); | |
1159 | } | |
002437cd AL |
1160 | } |
1161 | ||
b6503ed9 AL |
1162 | if (version_id >= 5) { |
1163 | n->mac_table.in_use = qemu_get_be32(f); | |
1164 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
1165 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
1166 | qemu_get_buffer(f, n->mac_table.macs, | |
1167 | n->mac_table.in_use * ETH_ALEN); | |
1168 | } else if (n->mac_table.in_use) { | |
e398d61b JQ |
1169 | uint8_t *buf = g_malloc0(n->mac_table.in_use); |
1170 | qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN); | |
1171 | g_free(buf); | |
8fd2a2f1 | 1172 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
1173 | n->mac_table.in_use = 0; |
1174 | } | |
1175 | } | |
1176 | ||
f21c0ed9 AL |
1177 | if (version_id >= 6) |
1178 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
1179 | ||
3a330134 MM |
1180 | if (version_id >= 7) { |
1181 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 1182 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
1183 | return -1; |
1184 | } | |
1185 | ||
1186 | if (n->has_vnet_hdr) { | |
b356f76d | 1187 | tap_set_offload(qemu_get_queue(n->nic)->peer, |
704a76fc MT |
1188 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
1189 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
1190 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
1191 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1, | |
1192 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
3a330134 | 1193 | } |
6c042c16 AW |
1194 | } |
1195 | ||
8fd2a2f1 AW |
1196 | if (version_id >= 9) { |
1197 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
1198 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
1199 | } | |
1200 | ||
015cb166 AW |
1201 | if (version_id >= 10) { |
1202 | n->alluni = qemu_get_byte(f); | |
1203 | n->nomulti = qemu_get_byte(f); | |
1204 | n->nouni = qemu_get_byte(f); | |
1205 | n->nobcast = qemu_get_byte(f); | |
1206 | } | |
1207 | ||
0ce0e8f4 MM |
1208 | if (version_id >= 11) { |
1209 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 1210 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
1211 | return -1; |
1212 | } | |
1213 | } | |
1214 | ||
5f800801 JW |
1215 | if (n->max_queues > 1) { |
1216 | if (n->max_queues != qemu_get_be16(f)) { | |
1217 | error_report("virtio-net: different max_queues "); | |
1218 | return -1; | |
1219 | } | |
1220 | ||
1221 | n->curr_queues = qemu_get_be16(f); | |
1222 | for (i = 1; i < n->curr_queues; i++) { | |
1223 | n->vqs[i].tx_waiting = qemu_get_be32(f); | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | virtio_net_set_queues(n); | |
1228 | ||
2d9aba39 AW |
1229 | /* Find the first multicast entry in the saved MAC filter */ |
1230 | for (i = 0; i < n->mac_table.in_use; i++) { | |
1231 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
1232 | break; | |
1233 | } | |
1234 | } | |
1235 | n->mac_table.first_multi = i; | |
98991481 AK |
1236 | |
1237 | /* nc.link_down can't be migrated, so infer link_down according | |
1238 | * to link status bit in n->status */ | |
5f800801 JW |
1239 | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; |
1240 | for (i = 0; i < n->max_queues; i++) { | |
1241 | qemu_get_subqueue(n->nic, i)->link_down = link_down; | |
1242 | } | |
98991481 | 1243 | |
fbe78f4f AL |
1244 | return 0; |
1245 | } | |
1246 | ||
4e68f7a0 | 1247 | static void virtio_net_cleanup(NetClientState *nc) |
b946a153 | 1248 | { |
cc1f0f45 | 1249 | VirtIONet *n = qemu_get_nic_opaque(nc); |
b946a153 | 1250 | |
eb6b6c12 | 1251 | n->nic = NULL; |
b946a153 AL |
1252 | } |
1253 | ||
eb6b6c12 | 1254 | static NetClientInfo net_virtio_info = { |
2be64a68 | 1255 | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
eb6b6c12 MM |
1256 | .size = sizeof(NICState), |
1257 | .can_receive = virtio_net_can_receive, | |
1258 | .receive = virtio_net_receive, | |
1259 | .cleanup = virtio_net_cleanup, | |
1260 | .link_status_changed = virtio_net_set_link_status, | |
1261 | }; | |
1262 | ||
f56a1247 MT |
1263 | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
1264 | { | |
1265 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 1266 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1267 | assert(n->vhost_started); |
b356f76d | 1268 | return vhost_net_virtqueue_pending(tap_get_vhost_net(nc->peer), idx); |
f56a1247 MT |
1269 | } |
1270 | ||
1271 | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, | |
1272 | bool mask) | |
1273 | { | |
1274 | VirtIONet *n = to_virtio_net(vdev); | |
fed699f9 | 1275 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 1276 | assert(n->vhost_started); |
b356f76d | 1277 | vhost_net_virtqueue_mask(tap_get_vhost_net(nc->peer), |
f56a1247 MT |
1278 | vdev, idx, mask); |
1279 | } | |
1280 | ||
f0c07c7c AW |
1281 | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
1282 | virtio_net_conf *net) | |
fbe78f4f AL |
1283 | { |
1284 | VirtIONet *n; | |
fed699f9 | 1285 | int i; |
fbe78f4f | 1286 | |
53c25cea PB |
1287 | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, |
1288 | sizeof(struct virtio_net_config), | |
1289 | sizeof(VirtIONet)); | |
fbe78f4f | 1290 | |
0f03eca6 AL |
1291 | n->vdev.get_config = virtio_net_get_config; |
1292 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
1293 | n->vdev.get_features = virtio_net_get_features; |
1294 | n->vdev.set_features = virtio_net_set_features; | |
8eca6b1b | 1295 | n->vdev.bad_features = virtio_net_bad_features; |
002437cd | 1296 | n->vdev.reset = virtio_net_reset; |
9bc6304c | 1297 | n->vdev.set_status = virtio_net_set_status; |
f56a1247 MT |
1298 | n->vdev.guest_notifier_mask = virtio_net_guest_notifier_mask; |
1299 | n->vdev.guest_notifier_pending = virtio_net_guest_notifier_pending; | |
fed699f9 JW |
1300 | n->vqs[0].rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
1301 | n->max_queues = conf->queues; | |
1302 | n->curr_queues = 1; | |
1303 | n->vqs[0].n = n; | |
1304 | n->tx_timeout = net->txtimer; | |
a697a334 AW |
1305 | |
1306 | if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { | |
e7b43f7e SH |
1307 | error_report("virtio-net: " |
1308 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
1309 | net->tx); | |
1310 | error_report("Defaulting to \"bh\""); | |
a697a334 AW |
1311 | } |
1312 | ||
1313 | if (net->tx && !strcmp(net->tx, "timer")) { | |
fed699f9 JW |
1314 | n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, |
1315 | virtio_net_handle_tx_timer); | |
1316 | n->vqs[0].tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer, | |
1317 | &n->vqs[0]); | |
a697a334 | 1318 | } else { |
fed699f9 JW |
1319 | n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, |
1320 | virtio_net_handle_tx_bh); | |
1321 | n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); | |
a697a334 | 1322 | } |
4ffb17f5 | 1323 | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); |
97b15621 | 1324 | qemu_macaddr_default_if_unset(&conf->macaddr); |
3cbe04c4 | 1325 | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
554c97dd | 1326 | n->status = VIRTIO_NET_S_LINK_UP; |
fbe78f4f | 1327 | |
f79f2bfc | 1328 | n->nic = qemu_new_nic(&net_virtio_info, conf, object_get_typename(OBJECT(dev)), dev->id, n); |
6e371ab8 MT |
1329 | peer_test_vnet_hdr(n); |
1330 | if (peer_has_vnet_hdr(n)) { | |
fed699f9 JW |
1331 | for (i = 0; i < n->max_queues; i++) { |
1332 | tap_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); | |
1333 | } | |
6e371ab8 MT |
1334 | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
1335 | } else { | |
1336 | n->host_hdr_len = 0; | |
1337 | } | |
eb6b6c12 | 1338 | |
b356f76d | 1339 | qemu_format_nic_info_str(qemu_get_queue(n->nic), conf->macaddr.a); |
96d5e201 | 1340 | |
fed699f9 | 1341 | n->vqs[0].tx_waiting = 0; |
e3f30488 | 1342 | n->tx_burst = net->txburst; |
ff3a8066 | 1343 | virtio_net_set_mrg_rx_bufs(n, 0); |
002437cd | 1344 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 1345 | |
7267c094 | 1346 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 1347 | |
7267c094 | 1348 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 1349 | |
01657c86 AW |
1350 | n->qdev = dev; |
1351 | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, | |
fbe78f4f | 1352 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 1353 | |
1ca4d09a GN |
1354 | add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0"); |
1355 | ||
53c25cea | 1356 | return &n->vdev; |
cf21e106 | 1357 | } |
97b15621 GH |
1358 | |
1359 | void virtio_net_exit(VirtIODevice *vdev) | |
1360 | { | |
1361 | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); | |
fed699f9 | 1362 | int i; |
9bc6304c | 1363 | |
afbaa7b4 MT |
1364 | /* This will stop vhost backend if appropriate. */ |
1365 | virtio_net_set_status(vdev, 0); | |
97b15621 | 1366 | |
01657c86 | 1367 | unregister_savevm(n->qdev, "virtio-net", n); |
97b15621 | 1368 | |
7267c094 AL |
1369 | g_free(n->mac_table.macs); |
1370 | g_free(n->vlans); | |
97b15621 | 1371 | |
fed699f9 JW |
1372 | for (i = 0; i < n->max_queues; i++) { |
1373 | VirtIONetQueue *q = &n->vqs[i]; | |
1374 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
1375 | ||
1376 | qemu_purge_queued_packets(nc); | |
1377 | ||
1378 | if (q->tx_timer) { | |
1379 | qemu_del_timer(q->tx_timer); | |
1380 | qemu_free_timer(q->tx_timer); | |
1381 | } else { | |
1382 | qemu_bh_delete(q->tx_bh); | |
1383 | } | |
a697a334 | 1384 | } |
97b15621 | 1385 | |
948ecf21 | 1386 | qemu_del_nic(n->nic); |
b52dfd71 | 1387 | virtio_cleanup(&n->vdev); |
97b15621 | 1388 | } |