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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; |
e35e23f6 MT |
44 | size_t host_hdr_len; |
45 | size_t guest_hdr_len; | |
0ce0e8f4 | 46 | uint8_t has_ufo; |
6243375f MM |
47 | struct { |
48 | VirtQueueElement elem; | |
49 | ssize_t len; | |
50 | } async_tx; | |
fbe78f4f | 51 | int mergeable_rx_bufs; |
f10c592e AW |
52 | uint8_t promisc; |
53 | uint8_t allmulti; | |
015cb166 AW |
54 | uint8_t alluni; |
55 | uint8_t nomulti; | |
56 | uint8_t nouni; | |
57 | uint8_t nobcast; | |
9bc6304c | 58 | uint8_t vhost_started; |
b6503ed9 AL |
59 | struct { |
60 | int in_use; | |
2d9aba39 | 61 | int first_multi; |
8fd2a2f1 AW |
62 | uint8_t multi_overflow; |
63 | uint8_t uni_overflow; | |
b6503ed9 AL |
64 | uint8_t *macs; |
65 | } mac_table; | |
f21c0ed9 | 66 | uint32_t *vlans; |
01657c86 | 67 | DeviceState *qdev; |
fbe78f4f AL |
68 | } VirtIONet; |
69 | ||
70 | /* TODO | |
71 | * - we could suppress RX interrupt if we were so inclined. | |
72 | */ | |
73 | ||
74 | static VirtIONet *to_virtio_net(VirtIODevice *vdev) | |
75 | { | |
76 | return (VirtIONet *)vdev; | |
77 | } | |
78 | ||
0f03eca6 | 79 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f AL |
80 | { |
81 | VirtIONet *n = to_virtio_net(vdev); | |
82 | struct virtio_net_config netcfg; | |
83 | ||
b46d97f2 | 84 | stw_p(&netcfg.status, n->status); |
79674068 | 85 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
fbe78f4f AL |
86 | memcpy(config, &netcfg, sizeof(netcfg)); |
87 | } | |
88 | ||
0f03eca6 AL |
89 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
90 | { | |
91 | VirtIONet *n = to_virtio_net(vdev); | |
92 | struct virtio_net_config netcfg; | |
93 | ||
94 | memcpy(&netcfg, config, sizeof(netcfg)); | |
95 | ||
79674068 AL |
96 | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
97 | memcpy(n->mac, netcfg.mac, ETH_ALEN); | |
eb6b6c12 | 98 | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
0f03eca6 AL |
99 | } |
100 | } | |
101 | ||
783e7706 MT |
102 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
103 | { | |
104 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && | |
85cf2a8d | 105 | (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
783e7706 MT |
106 | } |
107 | ||
108 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) | |
afbaa7b4 | 109 | { |
afbaa7b4 MT |
110 | if (!n->nic->nc.peer) { |
111 | return; | |
112 | } | |
2be64a68 | 113 | if (n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
afbaa7b4 MT |
114 | return; |
115 | } | |
116 | ||
117 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
118 | return; | |
119 | } | |
32993698 MT |
120 | if (!!n->vhost_started == virtio_net_started(n, status) && |
121 | !n->nic->nc.peer->link_down) { | |
afbaa7b4 MT |
122 | return; |
123 | } | |
124 | if (!n->vhost_started) { | |
5430a28f MT |
125 | int r; |
126 | if (!vhost_net_query(tap_get_vhost_net(n->nic->nc.peer), &n->vdev)) { | |
127 | return; | |
128 | } | |
129 | r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); | |
afbaa7b4 | 130 | if (r < 0) { |
e7b43f7e SH |
131 | error_report("unable to start vhost net: %d: " |
132 | "falling back on userspace virtio", -r); | |
afbaa7b4 MT |
133 | } else { |
134 | n->vhost_started = 1; | |
135 | } | |
136 | } else { | |
137 | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); | |
138 | n->vhost_started = 0; | |
139 | } | |
140 | } | |
141 | ||
783e7706 MT |
142 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
143 | { | |
144 | VirtIONet *n = to_virtio_net(vdev); | |
145 | ||
146 | virtio_net_vhost_status(n, status); | |
147 | ||
148 | if (!n->tx_waiting) { | |
149 | return; | |
150 | } | |
151 | ||
152 | if (virtio_net_started(n, status) && !n->vhost_started) { | |
153 | if (n->tx_timer) { | |
154 | qemu_mod_timer(n->tx_timer, | |
74475455 | 155 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
783e7706 MT |
156 | } else { |
157 | qemu_bh_schedule(n->tx_bh); | |
158 | } | |
159 | } else { | |
160 | if (n->tx_timer) { | |
161 | qemu_del_timer(n->tx_timer); | |
162 | } else { | |
163 | qemu_bh_cancel(n->tx_bh); | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
4e68f7a0 | 168 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 169 | { |
eb6b6c12 | 170 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
554c97dd AL |
171 | uint16_t old_status = n->status; |
172 | ||
eb6b6c12 | 173 | if (nc->link_down) |
554c97dd AL |
174 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
175 | else | |
176 | n->status |= VIRTIO_NET_S_LINK_UP; | |
177 | ||
178 | if (n->status != old_status) | |
179 | virtio_notify_config(&n->vdev); | |
afbaa7b4 MT |
180 | |
181 | virtio_net_set_status(&n->vdev, n->vdev.status); | |
554c97dd AL |
182 | } |
183 | ||
002437cd AL |
184 | static void virtio_net_reset(VirtIODevice *vdev) |
185 | { | |
186 | VirtIONet *n = to_virtio_net(vdev); | |
187 | ||
188 | /* Reset back to compatibility mode */ | |
189 | n->promisc = 1; | |
190 | n->allmulti = 0; | |
015cb166 AW |
191 | n->alluni = 0; |
192 | n->nomulti = 0; | |
193 | n->nouni = 0; | |
194 | n->nobcast = 0; | |
b6503ed9 | 195 | |
f21c0ed9 | 196 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 197 | n->mac_table.in_use = 0; |
2d9aba39 | 198 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
199 | n->mac_table.multi_overflow = 0; |
200 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 201 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
f21c0ed9 | 202 | memset(n->vlans, 0, MAX_VLAN >> 3); |
002437cd AL |
203 | } |
204 | ||
6e371ab8 | 205 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 206 | { |
eb6b6c12 | 207 | if (!n->nic->nc.peer) |
6e371ab8 | 208 | return; |
3a330134 | 209 | |
2be64a68 | 210 | if (n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) |
6e371ab8 | 211 | return; |
3a330134 | 212 | |
eb6b6c12 | 213 | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
6e371ab8 | 214 | } |
3a330134 | 215 | |
6e371ab8 MT |
216 | static int peer_has_vnet_hdr(VirtIONet *n) |
217 | { | |
3a330134 MM |
218 | return n->has_vnet_hdr; |
219 | } | |
220 | ||
0ce0e8f4 MM |
221 | static int peer_has_ufo(VirtIONet *n) |
222 | { | |
223 | if (!peer_has_vnet_hdr(n)) | |
224 | return 0; | |
225 | ||
eb6b6c12 | 226 | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
0ce0e8f4 MM |
227 | |
228 | return n->has_ufo; | |
229 | } | |
230 | ||
8172539d | 231 | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features) |
fbe78f4f | 232 | { |
3a330134 | 233 | VirtIONet *n = to_virtio_net(vdev); |
fbe78f4f | 234 | |
c9f79a3f MT |
235 | features |= (1 << VIRTIO_NET_F_MAC); |
236 | ||
6e371ab8 | 237 | if (!peer_has_vnet_hdr(n)) { |
8172539d MT |
238 | features &= ~(0x1 << VIRTIO_NET_F_CSUM); |
239 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4); | |
240 | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6); | |
241 | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN); | |
242 | ||
243 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM); | |
244 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4); | |
245 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6); | |
246 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN); | |
247 | } | |
3a330134 | 248 | |
8172539d MT |
249 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
250 | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO); | |
251 | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
252 | } |
253 | ||
9bc6304c | 254 | if (!n->nic->nc.peer || |
2be64a68 | 255 | n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
9bc6304c MT |
256 | return features; |
257 | } | |
258 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
259 | return features; | |
260 | } | |
261 | return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features); | |
fbe78f4f AL |
262 | } |
263 | ||
8eca6b1b AL |
264 | static uint32_t virtio_net_bad_features(VirtIODevice *vdev) |
265 | { | |
266 | uint32_t features = 0; | |
267 | ||
268 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
269 | * but also these: */ | |
270 | features |= (1 << VIRTIO_NET_F_MAC); | |
184bd048 DK |
271 | features |= (1 << VIRTIO_NET_F_CSUM); |
272 | features |= (1 << VIRTIO_NET_F_HOST_TSO4); | |
273 | features |= (1 << VIRTIO_NET_F_HOST_TSO6); | |
274 | features |= (1 << VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 275 | |
8172539d | 276 | return features; |
8eca6b1b AL |
277 | } |
278 | ||
fbe78f4f AL |
279 | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
280 | { | |
281 | VirtIONet *n = to_virtio_net(vdev); | |
282 | ||
283 | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)); | |
e35e23f6 MT |
284 | n->guest_hdr_len = n->mergeable_rx_bufs ? |
285 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
f5436dd9 MM |
286 | |
287 | if (n->has_vnet_hdr) { | |
eb6b6c12 | 288 | tap_set_offload(n->nic->nc.peer, |
f5436dd9 MM |
289 | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
290 | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
291 | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
6c9f58ba SS |
292 | (features >> VIRTIO_NET_F_GUEST_ECN) & 1, |
293 | (features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
f5436dd9 | 294 | } |
dc14a397 | 295 | if (!n->nic->nc.peer || |
2be64a68 | 296 | n->nic->nc.peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { |
dc14a397 DS |
297 | return; |
298 | } | |
299 | if (!tap_get_vhost_net(n->nic->nc.peer)) { | |
300 | return; | |
301 | } | |
57c3229b | 302 | vhost_net_ack_features(tap_get_vhost_net(n->nic->nc.peer), features); |
fbe78f4f AL |
303 | } |
304 | ||
002437cd AL |
305 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
306 | VirtQueueElement *elem) | |
307 | { | |
308 | uint8_t on; | |
309 | ||
310 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { | |
e7b43f7e | 311 | error_report("virtio-net ctrl invalid rx mode command"); |
002437cd AL |
312 | exit(1); |
313 | } | |
314 | ||
315 | on = ldub_p(elem->out_sg[1].iov_base); | |
316 | ||
317 | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC) | |
318 | n->promisc = on; | |
319 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) | |
320 | n->allmulti = on; | |
015cb166 AW |
321 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
322 | n->alluni = on; | |
323 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) | |
324 | n->nomulti = on; | |
325 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) | |
326 | n->nouni = on; | |
327 | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) | |
328 | n->nobcast = on; | |
002437cd AL |
329 | else |
330 | return VIRTIO_NET_ERR; | |
331 | ||
332 | return VIRTIO_NET_OK; | |
333 | } | |
334 | ||
b6503ed9 AL |
335 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
336 | VirtQueueElement *elem) | |
337 | { | |
338 | struct virtio_net_ctrl_mac mac_data; | |
339 | ||
340 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || | |
341 | elem->out_sg[1].iov_len < sizeof(mac_data) || | |
342 | elem->out_sg[2].iov_len < sizeof(mac_data)) | |
343 | return VIRTIO_NET_ERR; | |
344 | ||
345 | n->mac_table.in_use = 0; | |
2d9aba39 | 346 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
347 | n->mac_table.uni_overflow = 0; |
348 | n->mac_table.multi_overflow = 0; | |
b6503ed9 AL |
349 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
350 | ||
44b15bc5 | 351 | mac_data.entries = ldl_p(elem->out_sg[1].iov_base); |
b6503ed9 AL |
352 | |
353 | if (sizeof(mac_data.entries) + | |
354 | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len) | |
355 | return VIRTIO_NET_ERR; | |
356 | ||
357 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
358 | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), | |
359 | mac_data.entries * ETH_ALEN); | |
360 | n->mac_table.in_use += mac_data.entries; | |
361 | } else { | |
8fd2a2f1 | 362 | n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
363 | } |
364 | ||
2d9aba39 AW |
365 | n->mac_table.first_multi = n->mac_table.in_use; |
366 | ||
44b15bc5 | 367 | mac_data.entries = ldl_p(elem->out_sg[2].iov_base); |
b6503ed9 AL |
368 | |
369 | if (sizeof(mac_data.entries) + | |
370 | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len) | |
371 | return VIRTIO_NET_ERR; | |
372 | ||
373 | if (mac_data.entries) { | |
374 | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) { | |
375 | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), | |
376 | elem->out_sg[2].iov_base + sizeof(mac_data), | |
377 | mac_data.entries * ETH_ALEN); | |
378 | n->mac_table.in_use += mac_data.entries; | |
8fd2a2f1 AW |
379 | } else { |
380 | n->mac_table.multi_overflow = 1; | |
381 | } | |
b6503ed9 AL |
382 | } |
383 | ||
384 | return VIRTIO_NET_OK; | |
385 | } | |
386 | ||
f21c0ed9 AL |
387 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
388 | VirtQueueElement *elem) | |
389 | { | |
390 | uint16_t vid; | |
391 | ||
392 | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { | |
e7b43f7e | 393 | error_report("virtio-net ctrl invalid vlan command"); |
f21c0ed9 AL |
394 | return VIRTIO_NET_ERR; |
395 | } | |
396 | ||
44b15bc5 | 397 | vid = lduw_p(elem->out_sg[1].iov_base); |
f21c0ed9 AL |
398 | |
399 | if (vid >= MAX_VLAN) | |
400 | return VIRTIO_NET_ERR; | |
401 | ||
402 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
403 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
404 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
405 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
406 | else | |
407 | return VIRTIO_NET_ERR; | |
408 | ||
409 | return VIRTIO_NET_OK; | |
410 | } | |
411 | ||
3d11d36c AL |
412 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
413 | { | |
002437cd | 414 | VirtIONet *n = to_virtio_net(vdev); |
3d11d36c AL |
415 | struct virtio_net_ctrl_hdr ctrl; |
416 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
417 | VirtQueueElement elem; | |
418 | ||
419 | while (virtqueue_pop(vq, &elem)) { | |
420 | if ((elem.in_num < 1) || (elem.out_num < 1)) { | |
e7b43f7e | 421 | error_report("virtio-net ctrl missing headers"); |
3d11d36c AL |
422 | exit(1); |
423 | } | |
424 | ||
425 | if (elem.out_sg[0].iov_len < sizeof(ctrl) || | |
c6bb9a32 | 426 | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
e7b43f7e | 427 | error_report("virtio-net ctrl header not in correct element"); |
3d11d36c AL |
428 | exit(1); |
429 | } | |
430 | ||
431 | ctrl.class = ldub_p(elem.out_sg[0].iov_base); | |
432 | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); | |
433 | ||
002437cd AL |
434 | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE) |
435 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); | |
b6503ed9 AL |
436 | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
437 | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); | |
f21c0ed9 AL |
438 | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
439 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); | |
002437cd | 440 | |
3d11d36c AL |
441 | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status); |
442 | ||
443 | virtqueue_push(vq, &elem, sizeof(status)); | |
444 | virtio_notify(vdev, vq); | |
445 | } | |
446 | } | |
447 | ||
fbe78f4f AL |
448 | /* RX */ |
449 | ||
450 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
451 | { | |
8aeff62d MM |
452 | VirtIONet *n = to_virtio_net(vdev); |
453 | ||
eb6b6c12 | 454 | qemu_flush_queued_packets(&n->nic->nc); |
fbe78f4f AL |
455 | } |
456 | ||
4e68f7a0 | 457 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 458 | { |
eb6b6c12 | 459 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
85cf2a8d | 460 | if (!n->vdev.vm_running) { |
95477323 MT |
461 | return 0; |
462 | } | |
cdd5cc12 | 463 | |
fbe78f4f AL |
464 | if (!virtio_queue_ready(n->rx_vq) || |
465 | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
466 | return 0; | |
467 | ||
cdd5cc12 MM |
468 | return 1; |
469 | } | |
470 | ||
471 | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) | |
472 | { | |
fbe78f4f AL |
473 | if (virtio_queue_empty(n->rx_vq) || |
474 | (n->mergeable_rx_bufs && | |
475 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) { | |
476 | virtio_queue_set_notification(n->rx_vq, 1); | |
06b12970 TL |
477 | |
478 | /* To avoid a race condition where the guest has made some buffers | |
479 | * available after the above check but before notification was | |
480 | * enabled, check for available buffers again. | |
481 | */ | |
482 | if (virtio_queue_empty(n->rx_vq) || | |
483 | (n->mergeable_rx_bufs && | |
484 | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) | |
485 | return 0; | |
fbe78f4f AL |
486 | } |
487 | ||
488 | virtio_queue_set_notification(n->rx_vq, 0); | |
489 | return 1; | |
490 | } | |
491 | ||
1d41b0c1 AL |
492 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
493 | * it never finds out that the packets don't have valid checksums. This | |
494 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
495 | * fix this with Xen but it hasn't appeared in an upstream release of | |
496 | * dhclient yet. | |
497 | * | |
498 | * To avoid breaking existing guests, we catch udp packets and add | |
499 | * checksums. This is terrible but it's better than hacking the guest | |
500 | * kernels. | |
501 | * | |
502 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
503 | * we should provide a mechanism to disable it to avoid polluting the host | |
504 | * cache. | |
505 | */ | |
506 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 507 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
508 | { |
509 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
510 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
511 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
512 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
513 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 514 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
515 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
516 | } | |
517 | } | |
518 | ||
280598b7 MT |
519 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
520 | const void *buf, size_t size) | |
fbe78f4f | 521 | { |
3a330134 | 522 | if (n->has_vnet_hdr) { |
22cc84db MT |
523 | /* FIXME this cast is evil */ |
524 | void *wbuf = (void *)buf; | |
280598b7 MT |
525 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
526 | size - n->host_hdr_len); | |
527 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); | |
22cc84db MT |
528 | } else { |
529 | struct virtio_net_hdr hdr = { | |
530 | .flags = 0, | |
531 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
532 | }; | |
533 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 534 | } |
fbe78f4f AL |
535 | } |
536 | ||
3831ab20 AL |
537 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
538 | { | |
539 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 540 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 541 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 542 | int i; |
3831ab20 AL |
543 | |
544 | if (n->promisc) | |
545 | return 1; | |
546 | ||
e043ebc6 | 547 | ptr += n->host_hdr_len; |
3a330134 | 548 | |
f21c0ed9 AL |
549 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
550 | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; | |
551 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) | |
552 | return 0; | |
553 | } | |
554 | ||
bbe2f399 AW |
555 | if (ptr[0] & 1) { // multicast |
556 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
557 | return !n->nobcast; |
558 | } else if (n->nomulti) { | |
559 | return 0; | |
8fd2a2f1 | 560 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
561 | return 1; |
562 | } | |
2d9aba39 AW |
563 | |
564 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
565 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
566 | return 1; | |
567 | } | |
568 | } | |
bbe2f399 | 569 | } else { // unicast |
015cb166 AW |
570 | if (n->nouni) { |
571 | return 0; | |
572 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
573 | return 1; |
574 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
575 | return 1; |
576 | } | |
3831ab20 | 577 | |
2d9aba39 AW |
578 | for (i = 0; i < n->mac_table.first_multi; i++) { |
579 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
580 | return 1; | |
581 | } | |
582 | } | |
b6503ed9 AL |
583 | } |
584 | ||
3831ab20 AL |
585 | return 0; |
586 | } | |
587 | ||
4e68f7a0 | 588 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
fbe78f4f | 589 | { |
eb6b6c12 | 590 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
63c58728 MT |
591 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
592 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
593 | unsigned mhdr_cnt = 0; | |
22cc84db | 594 | size_t offset, i, guest_offset; |
fbe78f4f | 595 | |
eb6b6c12 | 596 | if (!virtio_net_can_receive(&n->nic->nc)) |
cdd5cc12 MM |
597 | return -1; |
598 | ||
940cda94 | 599 | /* hdr_len refers to the header we supply to the guest */ |
e35e23f6 | 600 | if (!virtio_net_has_buffers(n, size + n->guest_hdr_len - n->host_hdr_len)) |
8aeff62d | 601 | return 0; |
fbe78f4f | 602 | |
3831ab20 | 603 | if (!receive_filter(n, buf, size)) |
4f1c942b | 604 | return size; |
3831ab20 | 605 | |
fbe78f4f AL |
606 | offset = i = 0; |
607 | ||
608 | while (offset < size) { | |
609 | VirtQueueElement elem; | |
610 | int len, total; | |
22cc84db | 611 | const struct iovec *sg = elem.in_sg; |
fbe78f4f | 612 | |
22c253d9 | 613 | total = 0; |
fbe78f4f | 614 | |
279a4253 | 615 | if (virtqueue_pop(n->rx_vq, &elem) == 0) { |
fbe78f4f | 616 | if (i == 0) |
4f1c942b | 617 | return -1; |
e7b43f7e | 618 | error_report("virtio-net unexpected empty queue: " |
279a4253 | 619 | "i %zd mergeable %d offset %zd, size %zd, " |
e7b43f7e | 620 | "guest hdr len %zd, host hdr len %zd guest features 0x%x", |
279a4253 | 621 | i, n->mergeable_rx_bufs, offset, size, |
e35e23f6 | 622 | n->guest_hdr_len, n->host_hdr_len, n->vdev.guest_features); |
fbe78f4f AL |
623 | exit(1); |
624 | } | |
625 | ||
626 | if (elem.in_num < 1) { | |
e7b43f7e | 627 | error_report("virtio-net receive queue contains no in buffers"); |
fbe78f4f AL |
628 | exit(1); |
629 | } | |
630 | ||
fbe78f4f | 631 | if (i == 0) { |
c8d28e7e | 632 | assert(offset == 0); |
63c58728 MT |
633 | if (n->mergeable_rx_bufs) { |
634 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
635 | sg, elem.in_num, | |
636 | offsetof(typeof(mhdr), num_buffers), | |
637 | sizeof(mhdr.num_buffers)); | |
638 | } | |
fbe78f4f | 639 | |
c8d28e7e MT |
640 | receive_header(n, sg, elem.in_num, buf, size); |
641 | offset = n->host_hdr_len; | |
e35e23f6 | 642 | total += n->guest_hdr_len; |
22cc84db MT |
643 | guest_offset = n->guest_hdr_len; |
644 | } else { | |
645 | guest_offset = 0; | |
fbe78f4f AL |
646 | } |
647 | ||
648 | /* copy in packet. ugh */ | |
22cc84db | 649 | len = iov_from_buf(sg, elem.in_num, guest_offset, |
dcf6f5e1 | 650 | buf + offset, size - offset); |
fbe78f4f | 651 | total += len; |
279a4253 MT |
652 | offset += len; |
653 | /* If buffers can't be merged, at this point we | |
654 | * must have consumed the complete packet. | |
655 | * Otherwise, drop it. */ | |
656 | if (!n->mergeable_rx_bufs && offset < size) { | |
657 | #if 0 | |
e7b43f7e SH |
658 | error_report("virtio-net truncated non-mergeable packet: " |
659 | "i %zd mergeable %d offset %zd, size %zd, " | |
660 | "guest hdr len %zd, host hdr len %zd", | |
661 | i, n->mergeable_rx_bufs, | |
e35e23f6 | 662 | offset, size, n->guest_hdr_len, n->host_hdr_len); |
279a4253 MT |
663 | #endif |
664 | return size; | |
665 | } | |
fbe78f4f AL |
666 | |
667 | /* signal other side */ | |
668 | virtqueue_fill(n->rx_vq, &elem, total, i++); | |
fbe78f4f AL |
669 | } |
670 | ||
63c58728 MT |
671 | if (mhdr_cnt) { |
672 | stw_p(&mhdr.num_buffers, i); | |
673 | iov_from_buf(mhdr_sg, mhdr_cnt, | |
674 | 0, | |
675 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 676 | } |
fbe78f4f AL |
677 | |
678 | virtqueue_flush(n->rx_vq, i); | |
679 | virtio_notify(&n->vdev, n->rx_vq); | |
4f1c942b MM |
680 | |
681 | return size; | |
fbe78f4f AL |
682 | } |
683 | ||
e3f30488 | 684 | static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
6243375f | 685 | |
4e68f7a0 | 686 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 687 | { |
eb6b6c12 | 688 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
6243375f | 689 | |
40bad8f3 | 690 | virtqueue_push(n->tx_vq, &n->async_tx.elem, 0); |
6243375f MM |
691 | virtio_notify(&n->vdev, n->tx_vq); |
692 | ||
693 | n->async_tx.elem.out_num = n->async_tx.len = 0; | |
694 | ||
695 | virtio_queue_set_notification(n->tx_vq, 1); | |
696 | virtio_net_flush_tx(n, n->tx_vq); | |
697 | } | |
698 | ||
fbe78f4f | 699 | /* TX */ |
e3f30488 | 700 | static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
fbe78f4f AL |
701 | { |
702 | VirtQueueElement elem; | |
e3f30488 | 703 | int32_t num_packets = 0; |
e3f30488 AW |
704 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
705 | return num_packets; | |
706 | } | |
fbe78f4f | 707 | |
85cf2a8d | 708 | assert(n->vdev.vm_running); |
783e7706 | 709 | |
6243375f MM |
710 | if (n->async_tx.elem.out_num) { |
711 | virtio_queue_set_notification(n->tx_vq, 0); | |
e3f30488 | 712 | return num_packets; |
6243375f MM |
713 | } |
714 | ||
fbe78f4f | 715 | while (virtqueue_pop(vq, &elem)) { |
14761f9c | 716 | ssize_t ret, len; |
fbe78f4f AL |
717 | unsigned int out_num = elem.out_num; |
718 | struct iovec *out_sg = &elem.out_sg[0]; | |
14761f9c | 719 | struct iovec sg[VIRTQUEUE_MAX_SIZE]; |
fbe78f4f | 720 | |
7b80d08e | 721 | if (out_num < 1) { |
e7b43f7e | 722 | error_report("virtio-net header not in first element"); |
fbe78f4f AL |
723 | exit(1); |
724 | } | |
725 | ||
14761f9c MT |
726 | /* |
727 | * If host wants to see the guest header as is, we can | |
728 | * pass it on unchanged. Otherwise, copy just the parts | |
729 | * that host is interested in. | |
730 | */ | |
731 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
732 | if (n->host_hdr_len != n->guest_hdr_len) { | |
733 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
734 | out_sg, out_num, | |
735 | 0, n->host_hdr_len); | |
736 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
737 | out_sg, out_num, | |
738 | n->guest_hdr_len, -1); | |
739 | out_num = sg_num; | |
740 | out_sg = sg; | |
fbe78f4f AL |
741 | } |
742 | ||
7b80d08e | 743 | len = n->guest_hdr_len; |
14761f9c | 744 | |
eb6b6c12 | 745 | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
6243375f MM |
746 | virtio_net_tx_complete); |
747 | if (ret == 0) { | |
748 | virtio_queue_set_notification(n->tx_vq, 0); | |
749 | n->async_tx.elem = elem; | |
750 | n->async_tx.len = len; | |
e3f30488 | 751 | return -EBUSY; |
6243375f MM |
752 | } |
753 | ||
754 | len += ret; | |
fbe78f4f | 755 | |
40bad8f3 | 756 | virtqueue_push(vq, &elem, 0); |
fbe78f4f | 757 | virtio_notify(&n->vdev, vq); |
e3f30488 AW |
758 | |
759 | if (++num_packets >= n->tx_burst) { | |
760 | break; | |
761 | } | |
fbe78f4f | 762 | } |
e3f30488 | 763 | return num_packets; |
fbe78f4f AL |
764 | } |
765 | ||
a697a334 | 766 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f AL |
767 | { |
768 | VirtIONet *n = to_virtio_net(vdev); | |
769 | ||
783e7706 | 770 | /* This happens when device was stopped but VCPU wasn't. */ |
85cf2a8d | 771 | if (!n->vdev.vm_running) { |
783e7706 MT |
772 | n->tx_waiting = 1; |
773 | return; | |
774 | } | |
775 | ||
4b4b8d36 | 776 | if (n->tx_waiting) { |
fbe78f4f AL |
777 | virtio_queue_set_notification(vq, 1); |
778 | qemu_del_timer(n->tx_timer); | |
4b4b8d36 | 779 | n->tx_waiting = 0; |
fbe78f4f AL |
780 | virtio_net_flush_tx(n, vq); |
781 | } else { | |
782 | qemu_mod_timer(n->tx_timer, | |
74475455 | 783 | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
4b4b8d36 | 784 | n->tx_waiting = 1; |
fbe78f4f AL |
785 | virtio_queue_set_notification(vq, 0); |
786 | } | |
787 | } | |
788 | ||
a697a334 AW |
789 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
790 | { | |
791 | VirtIONet *n = to_virtio_net(vdev); | |
792 | ||
793 | if (unlikely(n->tx_waiting)) { | |
794 | return; | |
795 | } | |
783e7706 MT |
796 | n->tx_waiting = 1; |
797 | /* This happens when device was stopped but VCPU wasn't. */ | |
85cf2a8d | 798 | if (!n->vdev.vm_running) { |
783e7706 MT |
799 | return; |
800 | } | |
a697a334 AW |
801 | virtio_queue_set_notification(vq, 0); |
802 | qemu_bh_schedule(n->tx_bh); | |
a697a334 AW |
803 | } |
804 | ||
fbe78f4f AL |
805 | static void virtio_net_tx_timer(void *opaque) |
806 | { | |
807 | VirtIONet *n = opaque; | |
85cf2a8d | 808 | assert(n->vdev.vm_running); |
fbe78f4f | 809 | |
4b4b8d36 | 810 | n->tx_waiting = 0; |
fbe78f4f AL |
811 | |
812 | /* Just in case the driver is not ready on more */ | |
813 | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) | |
814 | return; | |
815 | ||
816 | virtio_queue_set_notification(n->tx_vq, 1); | |
817 | virtio_net_flush_tx(n, n->tx_vq); | |
818 | } | |
819 | ||
a697a334 AW |
820 | static void virtio_net_tx_bh(void *opaque) |
821 | { | |
822 | VirtIONet *n = opaque; | |
823 | int32_t ret; | |
824 | ||
85cf2a8d | 825 | assert(n->vdev.vm_running); |
783e7706 | 826 | |
a697a334 AW |
827 | n->tx_waiting = 0; |
828 | ||
829 | /* Just in case the driver is not ready on more */ | |
830 | if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))) | |
831 | return; | |
832 | ||
833 | ret = virtio_net_flush_tx(n, n->tx_vq); | |
834 | if (ret == -EBUSY) { | |
835 | return; /* Notification re-enable handled by tx_complete */ | |
836 | } | |
837 | ||
838 | /* If we flush a full burst of packets, assume there are | |
839 | * more coming and immediately reschedule */ | |
840 | if (ret >= n->tx_burst) { | |
841 | qemu_bh_schedule(n->tx_bh); | |
842 | n->tx_waiting = 1; | |
843 | return; | |
844 | } | |
845 | ||
846 | /* If less than a full burst, re-enable notification and flush | |
847 | * anything that may have come in while we weren't looking. If | |
848 | * we find something, assume the guest is still active and reschedule */ | |
849 | virtio_queue_set_notification(n->tx_vq, 1); | |
850 | if (virtio_net_flush_tx(n, n->tx_vq) > 0) { | |
851 | virtio_queue_set_notification(n->tx_vq, 0); | |
852 | qemu_bh_schedule(n->tx_bh); | |
853 | n->tx_waiting = 1; | |
854 | } | |
855 | } | |
856 | ||
fbe78f4f AL |
857 | static void virtio_net_save(QEMUFile *f, void *opaque) |
858 | { | |
859 | VirtIONet *n = opaque; | |
860 | ||
afbaa7b4 MT |
861 | /* At this point, backend must be stopped, otherwise |
862 | * it might keep writing to memory. */ | |
863 | assert(!n->vhost_started); | |
fbe78f4f AL |
864 | virtio_save(&n->vdev, f); |
865 | ||
79674068 | 866 | qemu_put_buffer(f, n->mac, ETH_ALEN); |
4b4b8d36 | 867 | qemu_put_be32(f, n->tx_waiting); |
e46cb38f | 868 | qemu_put_be32(f, n->mergeable_rx_bufs); |
9d6271b8 | 869 | qemu_put_be16(f, n->status); |
f10c592e AW |
870 | qemu_put_byte(f, n->promisc); |
871 | qemu_put_byte(f, n->allmulti); | |
b6503ed9 AL |
872 | qemu_put_be32(f, n->mac_table.in_use); |
873 | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); | |
f21c0ed9 | 874 | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); |
3a330134 | 875 | qemu_put_be32(f, n->has_vnet_hdr); |
8fd2a2f1 AW |
876 | qemu_put_byte(f, n->mac_table.multi_overflow); |
877 | qemu_put_byte(f, n->mac_table.uni_overflow); | |
015cb166 AW |
878 | qemu_put_byte(f, n->alluni); |
879 | qemu_put_byte(f, n->nomulti); | |
880 | qemu_put_byte(f, n->nouni); | |
881 | qemu_put_byte(f, n->nobcast); | |
0ce0e8f4 | 882 | qemu_put_byte(f, n->has_ufo); |
fbe78f4f AL |
883 | } |
884 | ||
885 | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) | |
886 | { | |
887 | VirtIONet *n = opaque; | |
2d9aba39 | 888 | int i; |
2a633c46 | 889 | int ret; |
fbe78f4f | 890 | |
9d6271b8 | 891 | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
fbe78f4f AL |
892 | return -EINVAL; |
893 | ||
2a633c46 OW |
894 | ret = virtio_load(&n->vdev, f); |
895 | if (ret) { | |
896 | return ret; | |
897 | } | |
fbe78f4f | 898 | |
79674068 | 899 | qemu_get_buffer(f, n->mac, ETH_ALEN); |
4b4b8d36 | 900 | n->tx_waiting = qemu_get_be32(f); |
e46cb38f | 901 | n->mergeable_rx_bufs = qemu_get_be32(f); |
e35e23f6 MT |
902 | n->guest_hdr_len = n->mergeable_rx_bufs ? |
903 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); | |
fbe78f4f | 904 | |
9d6271b8 AL |
905 | if (version_id >= 3) |
906 | n->status = qemu_get_be16(f); | |
907 | ||
002437cd | 908 | if (version_id >= 4) { |
f10c592e AW |
909 | if (version_id < 8) { |
910 | n->promisc = qemu_get_be32(f); | |
911 | n->allmulti = qemu_get_be32(f); | |
912 | } else { | |
913 | n->promisc = qemu_get_byte(f); | |
914 | n->allmulti = qemu_get_byte(f); | |
915 | } | |
002437cd AL |
916 | } |
917 | ||
b6503ed9 AL |
918 | if (version_id >= 5) { |
919 | n->mac_table.in_use = qemu_get_be32(f); | |
920 | /* MAC_TABLE_ENTRIES may be different from the saved image */ | |
921 | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { | |
922 | qemu_get_buffer(f, n->mac_table.macs, | |
923 | n->mac_table.in_use * ETH_ALEN); | |
924 | } else if (n->mac_table.in_use) { | |
e398d61b JQ |
925 | uint8_t *buf = g_malloc0(n->mac_table.in_use); |
926 | qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN); | |
927 | g_free(buf); | |
8fd2a2f1 | 928 | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; |
b6503ed9 AL |
929 | n->mac_table.in_use = 0; |
930 | } | |
931 | } | |
932 | ||
f21c0ed9 AL |
933 | if (version_id >= 6) |
934 | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); | |
935 | ||
3a330134 MM |
936 | if (version_id >= 7) { |
937 | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { | |
1ecda02b | 938 | error_report("virtio-net: saved image requires vnet_hdr=on"); |
3a330134 MM |
939 | return -1; |
940 | } | |
941 | ||
942 | if (n->has_vnet_hdr) { | |
eb6b6c12 | 943 | tap_set_offload(n->nic->nc.peer, |
704a76fc MT |
944 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1, |
945 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1, | |
946 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1, | |
947 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1, | |
948 | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1); | |
3a330134 | 949 | } |
6c042c16 AW |
950 | } |
951 | ||
8fd2a2f1 AW |
952 | if (version_id >= 9) { |
953 | n->mac_table.multi_overflow = qemu_get_byte(f); | |
954 | n->mac_table.uni_overflow = qemu_get_byte(f); | |
955 | } | |
956 | ||
015cb166 AW |
957 | if (version_id >= 10) { |
958 | n->alluni = qemu_get_byte(f); | |
959 | n->nomulti = qemu_get_byte(f); | |
960 | n->nouni = qemu_get_byte(f); | |
961 | n->nobcast = qemu_get_byte(f); | |
962 | } | |
963 | ||
0ce0e8f4 MM |
964 | if (version_id >= 11) { |
965 | if (qemu_get_byte(f) && !peer_has_ufo(n)) { | |
1ecda02b | 966 | error_report("virtio-net: saved image requires TUN_F_UFO support"); |
0ce0e8f4 MM |
967 | return -1; |
968 | } | |
969 | } | |
970 | ||
2d9aba39 AW |
971 | /* Find the first multicast entry in the saved MAC filter */ |
972 | for (i = 0; i < n->mac_table.in_use; i++) { | |
973 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
974 | break; | |
975 | } | |
976 | } | |
977 | n->mac_table.first_multi = i; | |
98991481 AK |
978 | |
979 | /* nc.link_down can't be migrated, so infer link_down according | |
980 | * to link status bit in n->status */ | |
981 | n->nic->nc.link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; | |
982 | ||
fbe78f4f AL |
983 | return 0; |
984 | } | |
985 | ||
4e68f7a0 | 986 | static void virtio_net_cleanup(NetClientState *nc) |
b946a153 | 987 | { |
eb6b6c12 | 988 | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
b946a153 | 989 | |
eb6b6c12 | 990 | n->nic = NULL; |
b946a153 AL |
991 | } |
992 | ||
eb6b6c12 | 993 | static NetClientInfo net_virtio_info = { |
2be64a68 | 994 | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
eb6b6c12 MM |
995 | .size = sizeof(NICState), |
996 | .can_receive = virtio_net_can_receive, | |
997 | .receive = virtio_net_receive, | |
998 | .cleanup = virtio_net_cleanup, | |
999 | .link_status_changed = virtio_net_set_link_status, | |
1000 | }; | |
1001 | ||
f0c07c7c AW |
1002 | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
1003 | virtio_net_conf *net) | |
fbe78f4f AL |
1004 | { |
1005 | VirtIONet *n; | |
fbe78f4f | 1006 | |
53c25cea PB |
1007 | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET, |
1008 | sizeof(struct virtio_net_config), | |
1009 | sizeof(VirtIONet)); | |
fbe78f4f | 1010 | |
0f03eca6 AL |
1011 | n->vdev.get_config = virtio_net_get_config; |
1012 | n->vdev.set_config = virtio_net_set_config; | |
fbe78f4f AL |
1013 | n->vdev.get_features = virtio_net_get_features; |
1014 | n->vdev.set_features = virtio_net_set_features; | |
8eca6b1b | 1015 | n->vdev.bad_features = virtio_net_bad_features; |
002437cd | 1016 | n->vdev.reset = virtio_net_reset; |
9bc6304c | 1017 | n->vdev.set_status = virtio_net_set_status; |
fbe78f4f | 1018 | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
a697a334 AW |
1019 | |
1020 | if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { | |
e7b43f7e SH |
1021 | error_report("virtio-net: " |
1022 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
1023 | net->tx); | |
1024 | error_report("Defaulting to \"bh\""); | |
a697a334 AW |
1025 | } |
1026 | ||
1027 | if (net->tx && !strcmp(net->tx, "timer")) { | |
1028 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_timer); | |
74475455 | 1029 | n->tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer, n); |
a697a334 AW |
1030 | n->tx_timeout = net->txtimer; |
1031 | } else { | |
1032 | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_bh); | |
1033 | n->tx_bh = qemu_bh_new(virtio_net_tx_bh, n); | |
1034 | } | |
4ffb17f5 | 1035 | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl); |
97b15621 | 1036 | qemu_macaddr_default_if_unset(&conf->macaddr); |
3cbe04c4 | 1037 | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
554c97dd | 1038 | n->status = VIRTIO_NET_S_LINK_UP; |
fbe78f4f | 1039 | |
f79f2bfc | 1040 | n->nic = qemu_new_nic(&net_virtio_info, conf, object_get_typename(OBJECT(dev)), dev->id, n); |
6e371ab8 MT |
1041 | peer_test_vnet_hdr(n); |
1042 | if (peer_has_vnet_hdr(n)) { | |
1043 | tap_using_vnet_hdr(n->nic->nc.peer, 1); | |
1044 | n->host_hdr_len = sizeof(struct virtio_net_hdr); | |
1045 | } else { | |
1046 | n->host_hdr_len = 0; | |
1047 | } | |
eb6b6c12 MM |
1048 | |
1049 | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); | |
96d5e201 | 1050 | |
4b4b8d36 | 1051 | n->tx_waiting = 0; |
e3f30488 | 1052 | n->tx_burst = net->txburst; |
fbe78f4f | 1053 | n->mergeable_rx_bufs = 0; |
e35e23f6 | 1054 | n->guest_hdr_len = sizeof(struct virtio_net_hdr); |
002437cd | 1055 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 1056 | |
7267c094 | 1057 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 1058 | |
7267c094 | 1059 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 1060 | |
01657c86 AW |
1061 | n->qdev = dev; |
1062 | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, | |
fbe78f4f | 1063 | virtio_net_save, virtio_net_load, n); |
cf21e106 | 1064 | |
1ca4d09a GN |
1065 | add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0"); |
1066 | ||
53c25cea | 1067 | return &n->vdev; |
cf21e106 | 1068 | } |
97b15621 GH |
1069 | |
1070 | void virtio_net_exit(VirtIODevice *vdev) | |
1071 | { | |
1072 | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); | |
9bc6304c | 1073 | |
afbaa7b4 MT |
1074 | /* This will stop vhost backend if appropriate. */ |
1075 | virtio_net_set_status(vdev, 0); | |
97b15621 | 1076 | |
eb6b6c12 | 1077 | qemu_purge_queued_packets(&n->nic->nc); |
97b15621 | 1078 | |
01657c86 | 1079 | unregister_savevm(n->qdev, "virtio-net", n); |
97b15621 | 1080 | |
7267c094 AL |
1081 | g_free(n->mac_table.macs); |
1082 | g_free(n->vlans); | |
97b15621 | 1083 | |
a697a334 AW |
1084 | if (n->tx_timer) { |
1085 | qemu_del_timer(n->tx_timer); | |
1086 | qemu_free_timer(n->tx_timer); | |
1087 | } else { | |
1088 | qemu_bh_delete(n->tx_bh); | |
1089 | } | |
97b15621 | 1090 | |
b20c6b9e | 1091 | qemu_del_net_client(&n->nic->nc); |
b52dfd71 | 1092 | virtio_cleanup(&n->vdev); |
97b15621 | 1093 | } |