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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 | ||
e4d5639d | 14 | #include "iov.h" |
fbe78f4f AL |
15 | #include "virtio.h" |
16 | #include "net.h" | |
7200ac3c | 17 | #include "net/checksum.h" |
a8ed73f7 | 18 | #include "net/tap.h" |
2f792016 | 19 | #include "qemu-error.h" |
fbe78f4f AL |
20 | #include "qemu-timer.h" |
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 | |
fbe78f4f AL |
29 | typedef struct VirtIONet |
30 | { | |
31 | VirtIODevice vdev; | |
79674068 | 32 | uint8_t mac[ETH_ALEN]; |
554c97dd | 33 | uint16_t status; |
fbe78f4f AL |
34 | VirtQueue *rx_vq; |
35 | VirtQueue *tx_vq; | |
3d11d36c | 36 | VirtQueue *ctrl_vq; |
eb6b6c12 | 37 | NICState *nic; |
fbe78f4f | 38 | QEMUTimer *tx_timer; |
a697a334 | 39 | QEMUBH *tx_bh; |
f0c07c7c | 40 | uint32_t tx_timeout; |
e3f30488 | 41 | int32_t tx_burst; |
4b4b8d36 | 42 | int tx_waiting; |
3a330134 | 43 | uint32_t has_vnet_hdr; |
0ce0e8f4 | 44 | uint8_t has_ufo; |
6243375f MM |
45 | struct { |
46 | VirtQueueElement elem; | |
47 | ssize_t len; | |
48 | } async_tx; | |
fbe78f4f | 49 | int mergeable_rx_bufs; |
f10c592e AW |
50 | uint8_t promisc; |
51 | uint8_t allmulti; | |
015cb166 AW |
52 | uint8_t alluni; |
53 | uint8_t nomulti; | |
54 | uint8_t nouni; | |
55 | uint8_t nobcast; | |
9bc6304c | 56 | uint8_t vhost_started; |
b6503ed9 AL |
57 | struct { |
58 | int in_use; | |
2d9aba39 | 59 | int first_multi; |
8fd2a2f1 AW |
60 | uint8_t multi_overflow; |
61 | uint8_t uni_overflow; | |
b6503ed9 AL |
62 | uint8_t *macs; |
63 | } mac_table; | |
f21c0ed9 | 64 | uint32_t *vlans; |
01657c86 | 65 | DeviceState *qdev; |
fbe78f4f AL |
66 | } VirtIONet; |
67 | ||
68 | /* TODO | |
69 | * - we could suppress RX interrupt if we were so inclined. | |
70 | */ | |
71 | ||
72 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
73 | { | |
74 | return (VirtIONet *)vdev; | |
75 | } | |
76 | ||
0f03eca6 | 77 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
78 | { |
79 | VirtIONet *n = to_virtio_net(vdev); | |
80 | struct virtio_net_config netcfg; | |
81 | ||
b46d97f2 | 82 | stw_p(&netcfg.status, n->status); |
79674068 | 83 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
fbe78f4f AL |
84 | memcpy(config, &netcfg, sizeof(netcfg)); |
85 | } | |
86 | ||
0f03eca6 AL |
87 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
88 | { | |
89 | VirtIONet *n = to_virtio_net(vdev); | |
90 | struct virtio_net_config netcfg; | |
91 | ||
92 | memcpy(&netcfg, config, sizeof(netcfg)); | |
93 | ||
79674068 AL |
94 | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
95 | memcpy(n->mac, netcfg.mac, ETH_ALEN); | |
eb6b6c12 | 96 | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
0f03eca6 AL |
97 | } |
98 | } | |
99 | ||
783e7706 MT |
100 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
101 | { | |
102 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && | |
85cf2a8d | 103 | (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
783e7706 MT |
104 | } |
105 | ||
106 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) | |
afbaa7b4 | 107 | { |
afbaa7b4 MT |
108 | if (!n->nic->nc.peer) { |
109 | return; | |
110 | } | |
2be64a68 | 111 | if (n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
afbaa7b4 MT |
112 | return; |
113 | } | |
114 | ||
115 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
116 | return; | |
117 | } | |
32993698 MT |
118 | if (!!n->vhost_started == virtio_net_started(n, status) && |
119 | !n->nic->nc.peer->link_down) { | |
afbaa7b4 MT |
120 | return; |
121 | } | |
122 | if (!n->vhost_started) { | |
5430a28f MT |
123 | int r; |
124 | if (!vhost_net_query(tap_get_vhost_net(n->nic->nc.peer), &n->vdev)) { | |
125 | return; | |
126 | } | |
127 | r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); | |
afbaa7b4 | 128 | if (r < 0) { |
e7b43f7e SH |
129 | error_report("unable to start vhost net: %d: " |
130 | "falling back on userspace virtio", -r); | |
afbaa7b4 MT |
131 | } else { |
132 | n->vhost_started = 1; | |
133 | } | |
134 | } else { | |
135 | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); | |
136 | n->vhost_started = 0; | |
137 | } | |
138 | } | |
139 | ||
783e7706 MT |
140 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
141 | { | |
142 | VirtIONet *n = to_virtio_net(vdev); | |
143 | ||
144 | virtio_net_vhost_status(n, status); | |
145 | ||
146 | if (!n->tx_waiting) { | |
147 | return; | |
148 | } | |
149 | ||
150 | if (virtio_net_started(n, status) && !n->vhost_started) { | |
151 | if (n->tx_timer) { | |
152 | qemu_mod_timer(n->tx_timer, | |
74475455 | 153 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
783e7706 MT |
154 | } else { |
155 | qemu_bh_schedule(n->tx_bh); | |
156 | } | |
157 | } else { | |
158 | if (n->tx_timer) { | |
159 | qemu_del_timer(n->tx_timer); | |
160 | } else { | |
161 | qemu_bh_cancel(n->tx_bh); | |
162 | } | |
163 | } | |
164 | } | |
165 | ||
4e68f7a0 | 166 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 167 | { |
eb6b6c12 | 168 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
554c97dd AL |
169 | uint16_t old_status = n->status; |
170 | ||
eb6b6c12 | 171 | if (nc->link_down) |
554c97dd AL |
172 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
173 | else | |
174 | n->status |= VIRTIO_NET_S_LINK_UP; | |
175 | ||
176 | if (n->status != old_status) | |
177 | virtio_notify_config(&n->vdev); | |
afbaa7b4 MT |
178 | |
179 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
554c97dd AL |
180 | } |
181 | ||
002437cd AL |
182 | static void virtio_net_reset(VirtIODevice *vdev) |
183 | { | |
184 | VirtIONet *n = to_virtio_net(vdev); | |
185 | ||
186 | /* Reset back to compatibility mode */ | |
187 | n->promisc = 1; | |
188 | n->allmulti = 0; | |
015cb166 AW |
189 | n->alluni = 0; |
190 | n->nomulti = 0; | |
191 | n->nouni = 0; | |
192 | n->nobcast = 0; | |
b6503ed9 | 193 | |
f21c0ed9 | 194 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 195 | n->mac_table.in_use = 0; |
2d9aba39 | 196 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
197 | n->mac_table.multi_overflow = 0; |
198 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 199 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
f21c0ed9 | 200 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
201 | } |
202 | ||
3a330134 MM |
203 | static int peer_has_vnet_hdr(VirtIONet *n) |
204 | { | |
eb6b6c12 | 205 | if (!n->nic->nc.peer) |
3a330134 MM |
206 | return 0; |
207 | ||
2be64a68 | 208 | if (n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) |
3a330134 MM |
209 | return 0; |
210 | ||
eb6b6c12 | 211 | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
3a330134 MM |
212 | |
213 | return n->has_vnet_hdr; | |
214 | } | |
215 | ||
0ce0e8f4 MM |
216 | static int peer_has_ufo(VirtIONet *n) |
217 | { | |
218 | if (!peer_has_vnet_hdr(n)) | |
219 | return 0; | |
220 | ||
eb6b6c12 | 221 | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
0ce0e8f4 MM |
222 | |
223 | return n->has_ufo; | |
224 | } | |
225 | ||
8172539d | 226 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 227 | { |
3a330134 | 228 | VirtIONet *n = to_virtio_net(vdev); |
fbe78f4f | 229 | |
c9f79a3f MT |
230 | features |= (1 << VIRTIO_NET_F_MAC); |
231 | ||
3a330134 | 232 | if (peer_has_vnet_hdr(n)) { |
eb6b6c12 | 233 | tap_using_vnet_hdr(n->nic->nc.peer, 1); |
8172539d MT |
234 | } else { |
235 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); | |
236 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
237 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
238 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
239 | ||
240 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
241 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
242 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
243 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
244 | } | |
3a330134 | 245 | |
8172539d MT |
246 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
247 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
248 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
249 | } |
250 | ||
9bc6304c | 251 | if (!n->nic->nc.peer || |
2be64a68 | 252 | n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
9bc6304c MT |
253 | return features; |
254 | } | |
255 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
256 | return features; | |
257 | } | |
258 | return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features); | |
fbe78f4f AL |
259 | } |
260 | ||
8eca6b1b AL |
261 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
262 | { | |
263 | uint32_t features = 0; | |
264 | ||
265 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
266 | * but also these: */ | |
267 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
268 | features |= (1 << VIRTIO_NET_F_CSUM); |
269 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
270 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
271 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 272 | |
8172539d | 273 | return features; |
8eca6b1b AL |
274 | } |
275 | ||
fbe78f4f AL |
276 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
277 | { | |
278 | VirtIONet *n = to_virtio_net(vdev); | |
279 | ||
280 | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)); | |
f5436dd9 MM |
281 | |
282 | if (n->has_vnet_hdr) { | |
eb6b6c12 | 283 | tap_set_offload(n->nic->nc.peer, |
f5436dd9 MM |
284 | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
285 | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
286 | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
6c9f58ba SS |
287 | (features >> VIRTIO_NET_F_GUEST_ECN) & 1, |
288 | (features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
f5436dd9 | 289 | } |
dc14a397 | 290 | if (!n->nic->nc.peer || |
2be64a68 | 291 | n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
dc14a397 DS |
292 | return; |
293 | } | |
294 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
295 | return; | |
296 | } | |
57c3229b | 297 | vhost_net_ack_features(tap_get_vhost_net(n->nic->nc.peer), features); |
fbe78f4f AL |
298 | } |
299 | ||
002437cd AL |
300 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
301 | VirtQueueElement *elem) | |
302 | { | |
303 | uint8_t on; | |
304 | ||
305 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { | |
e7b43f7e | 306 | error_report("virtio-net ctrl invalid rx mode command"); |
002437cd AL |
307 | exit(1); |
308 | } | |
309 | ||
310 | on = ldub_p(elem->out_sg[1].iov_base); | |
311 | ||
312 | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC) | |
313 | n->promisc = on; | |
314 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) | |
315 | n->allmulti = on; | |
015cb166 AW |
316 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
317 | n->alluni = on; | |
318 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) | |
319 | n->nomulti = on; | |
320 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) | |
321 | n->nouni = on; | |
322 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) | |
323 | n->nobcast = on; | |
002437cd AL |
324 | else |
325 | return VIRTIO_NET_ERR; | |
326 | ||
327 | return VIRTIO_NET_OK; | |
328 | } | |
329 | ||
b6503ed9 AL |
330 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
331 | VirtQueueElement *elem) | |
332 | { | |
333 | struct virtio_net_ctrl_mac mac_data; | |
334 | ||
335 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || | |
336 | elem->out_sg[1].iov_len < sizeof(mac_data) || | |
337 | elem->out_sg[2].iov_len < sizeof(mac_data)) | |
338 | return VIRTIO_NET_ERR; | |
339 | ||
340 | n->mac_table.in_use = 0; | |
2d9aba39 | 341 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
342 | n->mac_table.uni_overflow = 0; |
343 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
344 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
345 | ||
44b15bc5 | 346 | mac_data.entries = ldl_p(elem->out_sg[1].iov_base); |
b6503ed9 AL |
347 | |
348 | if (sizeof(mac_data.entries) + | |
349 | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len) | |
350 | return VIRTIO_NET_ERR; | |
351 | ||
352 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
353 | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), | |
354 | mac_data.entries * ETH_ALEN); | |
355 | n->mac_table.in_use += mac_data.entries; | |
356 | } else { | |
8fd2a2f1 | 357 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
358 | } |
359 | ||
2d9aba39 AW |
360 | n->mac_table.first_multi = n->mac_table.in_use; |
361 | ||
44b15bc5 | 362 | mac_data.entries = ldl_p(elem->out_sg[2].iov_base); |
b6503ed9 AL |
363 | |
364 | if (sizeof(mac_data.entries) + | |
365 | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len) | |
366 | return VIRTIO_NET_ERR; | |
367 | ||
368 | if (mac_data.entries) { | |
369 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { | |
370 | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), | |
371 | elem->out_sg[2].iov_base + sizeof(mac_data), | |
372 | mac_data.entries * ETH_ALEN); | |
373 | n->mac_table.in_use += mac_data.entries; | |
8fd2a2f1 AW |
374 | } else { |
375 | n->mac_table.multi_overflow = 1; | |
376 | } | |
b6503ed9 AL |
377 | } |
378 | ||
379 | return VIRTIO_NET_OK; | |
380 | } | |
381 | ||
f21c0ed9 AL |
382 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
383 | VirtQueueElement *elem) | |
384 | { | |
385 | uint16_t vid; | |
386 | ||
387 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { | |
e7b43f7e | 388 | error_report("virtio-net ctrl invalid vlan command"); |
f21c0ed9 AL |
389 | return VIRTIO_NET_ERR; |
390 | } | |
391 | ||
44b15bc5 | 392 | vid = lduw_p(elem->out_sg[1].iov_base); |
f21c0ed9 AL |
393 | |
394 | if (vid >= MAX_VLAN) | |
395 | return VIRTIO_NET_ERR; | |
396 | ||
397 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
398 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
399 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
400 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
401 | else | |
402 | return VIRTIO_NET_ERR; | |
403 | ||
404 | return VIRTIO_NET_OK; | |
405 | } | |
406 | ||
3d11d36c AL |
407 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
408 | { | |
002437cd | 409 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
410 | struct virtio_net_ctrl_hdr ctrl; |
411 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
412 | VirtQueueElement elem; | |
413 | ||
414 | while (virtqueue_pop(vq, &elem)) { | |
415 | if ((elem.in_num < 1) || (elem.out_num < 1)) { | |
e7b43f7e | 416 | error_report("virtio-net ctrl missing headers"); |
3d11d36c AL |
417 | exit(1); |
418 | } | |
419 | ||
420 | if (elem.out_sg[0].iov_len < sizeof(ctrl) || | |
c6bb9a32 | 421 | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
e7b43f7e | 422 | error_report("virtio-net ctrl header not in correct element"); |
3d11d36c AL |
423 | exit(1); |
424 | } | |
425 | ||
426 | ctrl.class = ldub_p(elem.out_sg[0].iov_base); | |
427 | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); | |
428 | ||
002437cd AL |
429 | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE) |
430 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); | |
b6503ed9 AL |
431 | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
432 | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); | |
f21c0ed9 AL |
433 | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
434 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); | |
002437cd | 435 | |
3d11d36c AL |
436 | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status); |
437 | ||
438 | virtqueue_push(vq, &elem, sizeof(status)); | |
439 | virtio_notify(vdev, vq); | |
440 | } | |
441 | } | |
442 | ||
fbe78f4f AL |
443 | /* RX */ |
444 | ||
445 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
446 | { | |
8aeff62d MM |
447 | VirtIONet *n = to_virtio_net(vdev); |
448 | ||
eb6b6c12 | 449 | qemu_flush_queued_packets(&n->nic->nc); |
fbe78f4f AL |
450 | } |
451 | ||
4e68f7a0 | 452 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 453 | { |
eb6b6c12 | 454 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
85cf2a8d | 455 | if (!n->vdev.vm_running) { |
95477323 MT |
456 | return 0; |
457 | } | |
cdd5cc12 | 458 | |
fbe78f4f AL |
459 | if (!virtio_queue_ready(n->rx_vq) || |
460 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
461 | return 0; | |
462 | ||
cdd5cc12 MM |
463 | return 1; |
464 | } | |
465 | ||
466 | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) | |
467 | { | |
fbe78f4f AL |
468 | if (virtio_queue_empty(n->rx_vq) || |
469 | (n->mergeable_rx_bufs && | |
470 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) { | |
471 | virtio_queue_set_notification(n->rx_vq, 1); | |
06b12970 TL |
472 | |
473 | /* To avoid a race condition where the guest has made some buffers | |
474 | * available after the above check but before notification was | |
475 | * enabled, check for available buffers again. | |
476 | */ | |
477 | if (virtio_queue_empty(n->rx_vq) || | |
478 | (n->mergeable_rx_bufs && | |
479 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) | |
480 | return 0; | |
fbe78f4f AL |
481 | } |
482 | ||
483 | virtio_queue_set_notification(n->rx_vq, 0); | |
484 | return 1; | |
485 | } | |
486 | ||
1d41b0c1 AL |
487 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
488 | * it never finds out that the packets don't have valid checksums. This | |
489 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
490 | * fix this with Xen but it hasn't appeared in an upstream release of | |
491 | * dhclient yet. | |
492 | * | |
493 | * To avoid breaking existing guests, we catch udp packets and add | |
494 | * checksums. This is terrible but it's better than hacking the guest | |
495 | * kernels. | |
496 | * | |
497 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
498 | * we should provide a mechanism to disable it to avoid polluting the host | |
499 | * cache. | |
500 | */ | |
501 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
502 | const uint8_t *buf, size_t size) | |
503 | { | |
504 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
505 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
506 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
507 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
508 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
509 | /* FIXME this cast is evil */ | |
510 | net_checksum_calculate((uint8_t *)buf, size); | |
511 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; | |
512 | } | |
513 | } | |
514 | ||
fbe78f4f | 515 | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
4689f4b3 | 516 | const void *buf, size_t size, size_t hdr_len) |
fbe78f4f | 517 | { |
3f4cb3d3 | 518 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
fbe78f4f AL |
519 | int offset = 0; |
520 | ||
521 | hdr->flags = 0; | |
522 | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
523 | ||
3a330134 MM |
524 | if (n->has_vnet_hdr) { |
525 | memcpy(hdr, buf, sizeof(*hdr)); | |
526 | offset = sizeof(*hdr); | |
1d41b0c1 | 527 | work_around_broken_dhclient(hdr, buf + offset, size - offset); |
3a330134 MM |
528 | } |
529 | ||
fbe78f4f AL |
530 | /* We only ever receive a struct virtio_net_hdr from the tapfd, |
531 | * but we may be passing along a larger header to the guest. | |
532 | */ | |
533 | iov[0].iov_base += hdr_len; | |
534 | iov[0].iov_len -= hdr_len; | |
535 | ||
536 | return offset; | |
537 | } | |
538 | ||
3831ab20 AL |
539 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
540 | { | |
541 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 542 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 543 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 544 | int i; |
3831ab20 AL |
545 | |
546 | if (n->promisc) | |
547 | return 1; | |
548 | ||
3a330134 MM |
549 | if (n->has_vnet_hdr) { |
550 | ptr += sizeof(struct virtio_net_hdr); | |
551 | } | |
552 | ||
f21c0ed9 AL |
553 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
554 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
555 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
556 | return 0; | |
557 | } | |
558 | ||
bbe2f399 AW |
559 | if (ptr[0] & 1) { // multicast |
560 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
561 | return !n->nobcast; |
562 | } else if (n->nomulti) { | |
563 | return 0; | |
8fd2a2f1 | 564 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
565 | return 1; |
566 | } | |
2d9aba39 AW |
567 | |
568 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
569 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
570 | return 1; | |
571 | } | |
572 | } | |
bbe2f399 | 573 | } else { // unicast |
015cb166 AW |
574 | if (n->nouni) { |
575 | return 0; | |
576 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
577 | return 1; |
578 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
579 | return 1; |
580 | } | |
3831ab20 | 581 | |
2d9aba39 AW |
582 | for (i = 0; i < n->mac_table.first_multi; i++) { |
583 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
584 | return 1; | |
585 | } | |
586 | } | |
b6503ed9 AL |
587 | } |
588 | ||
3831ab20 AL |
589 | return 0; |
590 | } | |
591 | ||
4e68f7a0 | 592 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 593 | { |
eb6b6c12 | 594 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
fbe78f4f | 595 | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
279a4253 | 596 | size_t guest_hdr_len, offset, i, host_hdr_len; |
fbe78f4f | 597 | |
eb6b6c12 | 598 | if (!virtio_net_can_receive(&n->nic->nc)) |
cdd5cc12 MM |
599 | return -1; |
600 | ||
940cda94 | 601 | /* hdr_len refers to the header we supply to the guest */ |
279a4253 | 602 | guest_hdr_len = n->mergeable_rx_bufs ? |
940cda94 MT |
603 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
604 | ||
605 | ||
279a4253 MT |
606 | host_hdr_len = n->has_vnet_hdr ? sizeof(struct virtio_net_hdr) : 0; |
607 | if (!virtio_net_has_buffers(n, size + guest_hdr_len - host_hdr_len)) | |
8aeff62d | 608 | return 0; |
fbe78f4f | 609 | |
3831ab20 | 610 | if (!receive_filter(n, buf, size)) |
4f1c942b | 611 | return size; |
3831ab20 | 612 | |
fbe78f4f AL |
613 | offset = i = 0; |
614 | ||
615 | while (offset < size) { | |
616 | VirtQueueElement elem; | |
617 | int len, total; | |
618 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; | |
619 | ||
22c253d9 | 620 | total = 0; |
fbe78f4f | 621 | |
279a4253 | 622 | if (virtqueue_pop(n->rx_vq, &elem) == 0) { |
fbe78f4f | 623 | if (i == 0) |
4f1c942b | 624 | return -1; |
e7b43f7e | 625 | error_report("virtio-net unexpected empty queue: " |
279a4253 | 626 | "i %zd mergeable %d offset %zd, size %zd, " |
e7b43f7e | 627 | "guest hdr len %zd, host hdr len %zd guest features 0x%x", |
279a4253 MT |
628 | i, n->mergeable_rx_bufs, offset, size, |
629 | guest_hdr_len, host_hdr_len, n->vdev.guest_features); | |
fbe78f4f AL |
630 | exit(1); |
631 | } | |
632 | ||
633 | if (elem.in_num < 1) { | |
e7b43f7e | 634 | error_report("virtio-net receive queue contains no in buffers"); |
fbe78f4f AL |
635 | exit(1); |
636 | } | |
637 | ||
279a4253 | 638 | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != guest_hdr_len) { |
e7b43f7e | 639 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
640 | exit(1); |
641 | } | |
642 | ||
643 | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); | |
644 | ||
645 | if (i == 0) { | |
646 | if (n->mergeable_rx_bufs) | |
647 | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; | |
648 | ||
649 | offset += receive_header(n, sg, elem.in_num, | |
279a4253 MT |
650 | buf + offset, size - offset, guest_hdr_len); |
651 | total += guest_hdr_len; | |
fbe78f4f AL |
652 | } |
653 | ||
654 | /* copy in packet. ugh */ | |
dcf6f5e1 MT |
655 | len = iov_from_buf(sg, elem.in_num, 0, |
656 | buf + offset, size - offset); | |
fbe78f4f | 657 | total += len; |
279a4253 MT |
658 | offset += len; |
659 | /* If buffers can't be merged, at this point we | |
660 | * must have consumed the complete packet. | |
661 | * Otherwise, drop it. */ | |
662 | if (!n->mergeable_rx_bufs && offset < size) { | |
663 | #if 0 | |
e7b43f7e SH |
664 | error_report("virtio-net truncated non-mergeable packet: " |
665 | "i %zd mergeable %d offset %zd, size %zd, " | |
666 | "guest hdr len %zd, host hdr len %zd", | |
667 | i, n->mergeable_rx_bufs, | |
668 | offset, size, guest_hdr_len, host_hdr_len); | |
279a4253 MT |
669 | #endif |
670 | return size; | |
671 | } | |
fbe78f4f AL |
672 | |
673 | /* signal other side */ | |
674 | virtqueue_fill(n->rx_vq, &elem, total, i++); | |
fbe78f4f AL |
675 | } |
676 | ||
44b15bc5 | 677 | if (mhdr) { |
b46d97f2 | 678 | stw_p(&mhdr->num_buffers, i); |
44b15bc5 | 679 | } |
fbe78f4f AL |
680 | |
681 | virtqueue_flush(n->rx_vq, i); | |
682 | virtio_notify(&n->vdev, n->rx_vq); | |
4f1c942b MM |
683 | |
684 | return size; | |
fbe78f4f AL |
685 | } |
686 | ||
e3f30488 | 687 | static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
6243375f | 688 | |
4e68f7a0 | 689 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 690 | { |
eb6b6c12 | 691 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
6243375f | 692 | |
40bad8f3 | 693 | virtqueue_push(n->tx_vq, &n->async_tx.elem, 0); |
6243375f MM |
694 | virtio_notify(&n->vdev, n->tx_vq); |
695 | ||
696 | n->async_tx.elem.out_num = n->async_tx.len = 0; | |
697 | ||
698 | virtio_queue_set_notification(n->tx_vq, 1); | |
699 | virtio_net_flush_tx(n, n->tx_vq); | |
700 | } | |
701 | ||
fbe78f4f | 702 | /* TX */ |
e3f30488 | 703 | static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
fbe78f4f AL |
704 | { |
705 | VirtQueueElement elem; | |
e3f30488 | 706 | int32_t num_packets = 0; |
e3f30488 AW |
707 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
708 | return num_packets; | |
709 | } | |
fbe78f4f | 710 | |
85cf2a8d | 711 | assert(n->vdev.vm_running); |
783e7706 | 712 | |
6243375f MM |
713 | if (n->async_tx.elem.out_num) { |
714 | virtio_queue_set_notification(n->tx_vq, 0); | |
e3f30488 | 715 | return num_packets; |
6243375f MM |
716 | } |
717 | ||
fbe78f4f | 718 | while (virtqueue_pop(vq, &elem)) { |
6243375f | 719 | ssize_t ret, len = 0; |
fbe78f4f AL |
720 | unsigned int out_num = elem.out_num; |
721 | struct iovec *out_sg = &elem.out_sg[0]; | |
722 | unsigned hdr_len; | |
723 | ||
724 | /* hdr_len refers to the header received from the guest */ | |
725 | hdr_len = n->mergeable_rx_bufs ? | |
726 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : | |
727 | sizeof(struct virtio_net_hdr); | |
728 | ||
729 | if (out_num < 1 || out_sg->iov_len != hdr_len) { | |
e7b43f7e | 730 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
731 | exit(1); |
732 | } | |
733 | ||
734 | /* ignore the header if GSO is not supported */ | |
3a330134 | 735 | if (!n->has_vnet_hdr) { |
fbe78f4f AL |
736 | out_num--; |
737 | out_sg++; | |
738 | len += hdr_len; | |
739 | } else if (n->mergeable_rx_bufs) { | |
740 | /* tapfd expects a struct virtio_net_hdr */ | |
741 | hdr_len -= sizeof(struct virtio_net_hdr); | |
742 | out_sg->iov_len -= hdr_len; | |
743 | len += hdr_len; | |
744 | } | |
745 | ||
eb6b6c12 | 746 | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
6243375f MM |
747 | virtio_net_tx_complete); |
748 | if (ret == 0) { | |
749 | virtio_queue_set_notification(n->tx_vq, 0); | |
750 | n->async_tx.elem = elem; | |
751 | n->async_tx.len = len; | |
e3f30488 | 752 | return -EBUSY; |
6243375f MM |
753 | } |
754 | ||
755 | len += ret; | |
fbe78f4f | 756 | |
40bad8f3 | 757 | virtqueue_push(vq, &elem, 0); |
fbe78f4f | 758 | virtio_notify(&n->vdev, vq); |
e3f30488 AW |
759 | |
760 | if (++num_packets >= n->tx_burst) { | |
761 | break; | |
762 | } | |
fbe78f4f | 763 | } |
e3f30488 | 764 | return num_packets; |
fbe78f4f AL |
765 | } |
766 | ||
a697a334 | 767 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f AL |
768 | { |
769 | VirtIONet *n = to_virtio_net(vdev); | |
770 | ||
783e7706 | 771 | /* This happens when device was stopped but VCPU wasn't. */ |
85cf2a8d | 772 | if (!n->vdev.vm_running) { |
783e7706 MT |
773 | n->tx_waiting = 1; |
774 | return; | |
775 | } | |
776 | ||
4b4b8d36 | 777 | if (n->tx_waiting) { |
fbe78f4f AL |
778 | virtio_queue_set_notification(vq, 1); |
779 | qemu_del_timer(n->tx_timer); | |
4b4b8d36 | 780 | n->tx_waiting = 0; |
fbe78f4f AL |
781 | virtio_net_flush_tx(n, vq); |
782 | } else { | |
783 | qemu_mod_timer(n->tx_timer, | |
74475455 | 784 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
4b4b8d36 | 785 | n->tx_waiting = 1; |
fbe78f4f AL |
786 | virtio_queue_set_notification(vq, 0); |
787 | } | |
788 | } | |
789 | ||
a697a334 AW |
790 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
791 | { | |
792 | VirtIONet *n = to_virtio_net(vdev); | |
793 | ||
794 | if (unlikely(n->tx_waiting)) { | |
795 | return; | |
796 | } | |
783e7706 MT |
797 | n->tx_waiting = 1; |
798 | /* This happens when device was stopped but VCPU wasn't. */ | |
85cf2a8d | 799 | if (!n->vdev.vm_running) { |
783e7706 MT |
800 | return; |
801 | } | |
a697a334 AW |
802 | virtio_queue_set_notification(vq, 0); |
803 | qemu_bh_schedule(n->tx_bh); | |
a697a334 AW |
804 | } |
805 | ||
fbe78f4f AL |
806 | static void virtio_net_tx_timer(void *opaque) |
807 | { | |
808 | VirtIONet *n = opaque; | |
85cf2a8d | 809 | assert(n->vdev.vm_running); |
fbe78f4f | 810 | |
4b4b8d36 | 811 | n->tx_waiting = 0; |
fbe78f4f AL |
812 | |
813 | /* Just in case the driver is not ready on more */ | |
814 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
815 | return; | |
816 | ||
817 | virtio_queue_set_notification(n->tx_vq, 1); | |
818 | virtio_net_flush_tx(n, n->tx_vq); | |
819 | } | |
820 | ||
a697a334 AW |
821 | static void virtio_net_tx_bh(void *opaque) |
822 | { | |
823 | VirtIONet *n = opaque; | |
824 | int32_t ret; | |
825 | ||
85cf2a8d | 826 | assert(n->vdev.vm_running); |
783e7706 | 827 | |
a697a334 AW |
828 | n->tx_waiting = 0; |
829 | ||
830 | /* Just in case the driver is not ready on more */ | |
831 | if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))) | |
832 | return; | |
833 | ||
834 | ret = virtio_net_flush_tx(n, n->tx_vq); | |
835 | if (ret == -EBUSY) { | |
836 | return; /* Notification re-enable handled by tx_complete */ | |
837 | } | |
838 | ||
839 | /* If we flush a full burst of packets, assume there are | |
840 | * more coming and immediately reschedule */ | |
841 | if (ret >= n->tx_burst) { | |
842 | qemu_bh_schedule(n->tx_bh); | |
843 | n->tx_waiting = 1; | |
844 | return; | |
845 | } | |
846 | ||
847 | /* If less than a full burst, re-enable notification and flush | |
848 | * anything that may have come in while we weren't looking. If | |
849 | * we find something, assume the guest is still active and reschedule */ | |
850 | virtio_queue_set_notification(n->tx_vq, 1); | |
851 | if (virtio_net_flush_tx(n, n->tx_vq) > 0) { | |
852 | virtio_queue_set_notification(n->tx_vq, 0); | |
853 | qemu_bh_schedule(n->tx_bh); | |
854 | n->tx_waiting = 1; | |
855 | } | |
856 | } | |
857 | ||
fbe78f4f AL |
858 | static void virtio_net_save(QEMUFile *f, void *opaque) |
859 | { | |
860 | VirtIONet *n = opaque; | |
861 | ||
afbaa7b4 MT |
862 | /* At this point, backend must be stopped, otherwise |
863 | * it might keep writing to memory. */ | |
864 | assert(!n->vhost_started); | |
fbe78f4f AL |
865 | virtio_save(&n->vdev, f); |
866 | ||
79674068 | 867 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
4b4b8d36 | 868 | qemu_put_be32(f, n->tx_waiting); |
e46cb38f | 869 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 870 | qemu_put_be16(f, n->status); |
f10c592e AW |
871 | qemu_put_byte(f, n->promisc); |
872 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
873 | qemu_put_be32(f, n->mac_table.in_use); |
874 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 875 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 876 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
877 | qemu_put_byte(f, n->mac_table.multi_overflow); |
878 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
879 | qemu_put_byte(f, n->alluni); |
880 | qemu_put_byte(f, n->nomulti); | |
881 | qemu_put_byte(f, n->nouni); | |
882 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 883 | qemu_put_byte(f, n->has_ufo); |
fbe78f4f AL |
884 | } |
885 | ||
886 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
887 | { | |
888 | VirtIONet *n = opaque; | |
2d9aba39 | 889 | int i; |
2a633c46 | 890 | int ret; |
fbe78f4f | 891 | |
9d6271b8 | 892 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
893 | return -EINVAL; |
894 | ||
2a633c46 OW |
895 | ret = virtio_load(&n->vdev, f); |
896 | if (ret) { | |
897 | return ret; | |
898 | } | |
fbe78f4f | 899 | |
79674068 | 900 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
4b4b8d36 | 901 | n->tx_waiting = qemu_get_be32(f); |
e46cb38f | 902 | n->mergeable_rx_bufs = qemu_get_be32(f); |
fbe78f4f | 903 | |
9d6271b8 AL |
904 | if (version_id >= 3) |
905 | n->status = qemu_get_be16(f); | |
906 | ||
002437cd | 907 | if (version_id >= 4) { |
f10c592e AW |
908 | if (version_id < 8) { |
909 | n->promisc = qemu_get_be32(f); | |
910 | n->allmulti = qemu_get_be32(f); | |
911 | } else { | |
912 | n->promisc = qemu_get_byte(f); | |
913 | n->allmulti = qemu_get_byte(f); | |
914 | } | |
002437cd AL |
915 | } |
916 | ||
b6503ed9 AL |
917 | if (version_id >= 5) { |
918 | n->mac_table.in_use = qemu_get_be32(f); | |
919 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
920 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
921 | qemu_get_buffer(f, n->mac_table.macs, | |
922 | n->mac_table.in_use * ETH_ALEN); | |
923 | } else if (n->mac_table.in_use) { | |
924 | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); | |
8fd2a2f1 | 925 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
926 | n->mac_table.in_use = 0; |
927 | } | |
928 | } | |
929 | ||
f21c0ed9 AL |
930 | if (version_id >= 6) |
931 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
932 | ||
3a330134 MM |
933 | if (version_id >= 7) { |
934 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 935 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
936 | return -1; |
937 | } | |
938 | ||
939 | if (n->has_vnet_hdr) { | |
eb6b6c12 MM |
940 | tap_using_vnet_hdr(n->nic->nc.peer, 1); |
941 | tap_set_offload(n->nic->nc.peer, | |
704a76fc MT |
942 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
943 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
944 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
945 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1, | |
946 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
3a330134 | 947 | } |
6c042c16 AW |
948 | } |
949 | ||
8fd2a2f1 AW |
950 | if (version_id >= 9) { |
951 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
952 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
953 | } | |
954 | ||
015cb166 AW |
955 | if (version_id >= 10) { |
956 | n->alluni = qemu_get_byte(f); | |
957 | n->nomulti = qemu_get_byte(f); | |
958 | n->nouni = qemu_get_byte(f); | |
959 | n->nobcast = qemu_get_byte(f); | |
960 | } | |
961 | ||
0ce0e8f4 MM |
962 | if (version_id >= 11) { |
963 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 964 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
965 | return -1; |
966 | } | |
967 | } | |
968 | ||
2d9aba39 AW |
969 | /* Find the first multicast entry in the saved MAC filter */ |
970 | for (i = 0; i < n->mac_table.in_use; i++) { | |
971 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
972 | break; | |
973 | } | |
974 | } | |
975 | n->mac_table.first_multi = i; | |
98991481 AK |
976 | |
977 | /* nc.link_down can't be migrated, so infer link_down according | |
978 | * to link status bit in n->status */ | |
979 | n->nic->nc.link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; | |
980 | ||
fbe78f4f AL |
981 | return 0; |
982 | } | |
983 | ||
4e68f7a0 | 984 | static void virtio_net_cleanup(NetClientState *nc) |
b946a153 | 985 | { |
eb6b6c12 | 986 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
b946a153 | 987 | |
eb6b6c12 | 988 | n->nic = NULL; |
b946a153 AL |
989 | } |
990 | ||
eb6b6c12 | 991 | static NetClientInfo net_virtio_info = { |
2be64a68 | 992 | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
eb6b6c12 MM |
993 | .size = sizeof(NICState), |
994 | .can_receive = virtio_net_can_receive, | |
995 | .receive = virtio_net_receive, | |
996 | .cleanup = virtio_net_cleanup, | |
997 | .link_status_changed = virtio_net_set_link_status, | |
998 | }; | |
999 | ||
f0c07c7c AW |
1000 | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
1001 | virtio_net_conf *net) | |
fbe78f4f AL |
1002 | { |
1003 | VirtIONet *n; | |
fbe78f4f | 1004 | |
53c25cea PB |
1005 | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, |
1006 | sizeof(struct virtio_net_config), | |
1007 | sizeof(VirtIONet)); | |
fbe78f4f | 1008 | |
0f03eca6 AL |
1009 | n->vdev.get_config = virtio_net_get_config; |
1010 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
1011 | n->vdev.get_features = virtio_net_get_features; |
1012 | n->vdev.set_features = virtio_net_set_features; | |
8eca6b1b | 1013 | n->vdev.bad_features = virtio_net_bad_features; |
002437cd | 1014 | n->vdev.reset = virtio_net_reset; |
9bc6304c | 1015 | n->vdev.set_status = virtio_net_set_status; |
fbe78f4f | 1016 | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
a697a334 AW |
1017 | |
1018 | if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { | |
e7b43f7e SH |
1019 | error_report("virtio-net: " |
1020 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
1021 | net->tx); | |
1022 | error_report("Defaulting to \"bh\""); | |
a697a334 AW |
1023 | } |
1024 | ||
1025 | if (net->tx && !strcmp(net->tx, "timer")) { | |
1026 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_timer); | |
74475455 | 1027 | n->tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer, n); |
a697a334 AW |
1028 | n->tx_timeout = net->txtimer; |
1029 | } else { | |
1030 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_bh); | |
1031 | n->tx_bh = qemu_bh_new(virtio_net_tx_bh, n); | |
1032 | } | |
4ffb17f5 | 1033 | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); |
97b15621 | 1034 | qemu_macaddr_default_if_unset(&conf->macaddr); |
3cbe04c4 | 1035 | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
554c97dd | 1036 | n->status = VIRTIO_NET_S_LINK_UP; |
fbe78f4f | 1037 | |
f79f2bfc | 1038 | n->nic = qemu_new_nic(&net_virtio_info, conf, object_get_typename(OBJECT(dev)), dev->id, n); |
eb6b6c12 MM |
1039 | |
1040 | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); | |
96d5e201 | 1041 | |
4b4b8d36 | 1042 | n->tx_waiting = 0; |
e3f30488 | 1043 | n->tx_burst = net->txburst; |
fbe78f4f | 1044 | n->mergeable_rx_bufs = 0; |
002437cd | 1045 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 1046 | |
7267c094 | 1047 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 1048 | |
7267c094 | 1049 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 1050 | |
01657c86 AW |
1051 | n->qdev = dev; |
1052 | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, | |
fbe78f4f | 1053 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 1054 | |
1ca4d09a GN |
1055 | add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0"); |
1056 | ||
53c25cea | 1057 | return &n->vdev; |
cf21e106 | 1058 | } |
97b15621 GH |
1059 | |
1060 | void virtio_net_exit(VirtIODevice *vdev) | |
1061 | { | |
1062 | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); | |
9bc6304c | 1063 | |
afbaa7b4 MT |
1064 | /* This will stop vhost backend if appropriate. */ |
1065 | virtio_net_set_status(vdev, 0); | |
97b15621 | 1066 | |
eb6b6c12 | 1067 | qemu_purge_queued_packets(&n->nic->nc); |
97b15621 | 1068 | |
01657c86 | 1069 | unregister_savevm(n->qdev, "virtio-net", n); |
97b15621 | 1070 | |
7267c094 AL |
1071 | g_free(n->mac_table.macs); |
1072 | g_free(n->vlans); | |
97b15621 | 1073 | |
a697a334 AW |
1074 | if (n->tx_timer) { |
1075 | qemu_del_timer(n->tx_timer); | |
1076 | qemu_free_timer(n->tx_timer); | |
1077 | } else { | |
1078 | qemu_bh_delete(n->tx_bh); | |
1079 | } | |
97b15621 | 1080 | |
b20c6b9e | 1081 | qemu_del_net_client(&n->nic->nc); |
b52dfd71 | 1082 | virtio_cleanup(&n->vdev); |
97b15621 | 1083 | } |