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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 | ||
9b8bfe21 | 14 | #include "qemu/osdep.h" |
1de7afc9 | 15 | #include "qemu/iov.h" |
0b8fa32f | 16 | #include "qemu/module.h" |
0d09e41a | 17 | #include "hw/virtio/virtio.h" |
1422e32d | 18 | #include "net/net.h" |
7200ac3c | 19 | #include "net/checksum.h" |
a8ed73f7 | 20 | #include "net/tap.h" |
1de7afc9 PB |
21 | #include "qemu/error-report.h" |
22 | #include "qemu/timer.h" | |
0d09e41a PB |
23 | #include "hw/virtio/virtio-net.h" |
24 | #include "net/vhost_net.h" | |
9d8c6a25 | 25 | #include "net/announce.h" |
17ec5a86 | 26 | #include "hw/virtio/virtio-bus.h" |
e688df6b | 27 | #include "qapi/error.h" |
9af23989 | 28 | #include "qapi/qapi-events-net.h" |
1399c60d | 29 | #include "hw/virtio/virtio-access.h" |
f8d806c9 | 30 | #include "migration/misc.h" |
9473939e | 31 | #include "standard-headers/linux/ethtool.h" |
9d8c6a25 | 32 | #include "trace.h" |
fbe78f4f | 33 | |
0ce0e8f4 | 34 | #define VIRTIO_NET_VM_VERSION 11 |
b6503ed9 | 35 | |
4ffb17f5 | 36 | #define MAC_TABLE_ENTRIES 64 |
f21c0ed9 | 37 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 38 | |
1c0fbfa3 MT |
39 | /* previously fixed value */ |
40 | #define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256 | |
9b02e161 WW |
41 | #define VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE 256 |
42 | ||
1c0fbfa3 MT |
43 | /* for now, only allow larger queues; with virtio-1, guest can downsize */ |
44 | #define VIRTIO_NET_RX_QUEUE_MIN_SIZE VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE | |
9b02e161 | 45 | #define VIRTIO_NET_TX_QUEUE_MIN_SIZE VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE |
1c0fbfa3 | 46 | |
2974e916 YB |
47 | #define VIRTIO_NET_IP4_ADDR_SIZE 8 /* ipv4 saddr + daddr */ |
48 | ||
49 | #define VIRTIO_NET_TCP_FLAG 0x3F | |
50 | #define VIRTIO_NET_TCP_HDR_LENGTH 0xF000 | |
51 | ||
52 | /* IPv4 max payload, 16 bits in the header */ | |
53 | #define VIRTIO_NET_MAX_IP4_PAYLOAD (65535 - sizeof(struct ip_header)) | |
54 | #define VIRTIO_NET_MAX_TCP_PAYLOAD 65535 | |
55 | ||
56 | /* header length value in ip header without option */ | |
57 | #define VIRTIO_NET_IP4_HEADER_LENGTH 5 | |
58 | ||
59 | #define VIRTIO_NET_IP6_ADDR_SIZE 32 /* ipv6 saddr + daddr */ | |
60 | #define VIRTIO_NET_MAX_IP6_PAYLOAD VIRTIO_NET_MAX_TCP_PAYLOAD | |
61 | ||
62 | /* Purge coalesced packets timer interval, This value affects the performance | |
63 | a lot, and should be tuned carefully, '300000'(300us) is the recommended | |
64 | value to pass the WHQL test, '50000' can gain 2x netperf throughput with | |
65 | tso/gso/gro 'off'. */ | |
66 | #define VIRTIO_NET_RSC_DEFAULT_INTERVAL 300000 | |
67 | ||
68 | /* temporary until standard header include it */ | |
69 | #if !defined(VIRTIO_NET_HDR_F_RSC_INFO) | |
70 | ||
71 | #define VIRTIO_NET_HDR_F_RSC_INFO 4 /* rsc_ext data in csum_ fields */ | |
d47e5e31 | 72 | #define VIRTIO_NET_F_RSC_EXT 61 |
2974e916 YB |
73 | |
74 | static inline __virtio16 *virtio_net_rsc_ext_num_packets( | |
75 | struct virtio_net_hdr *hdr) | |
76 | { | |
77 | return &hdr->csum_start; | |
78 | } | |
79 | ||
80 | static inline __virtio16 *virtio_net_rsc_ext_num_dupacks( | |
81 | struct virtio_net_hdr *hdr) | |
82 | { | |
83 | return &hdr->csum_offset; | |
84 | } | |
85 | ||
86 | #endif | |
87 | ||
14f9b664 | 88 | static VirtIOFeature feature_sizes[] = { |
127833ee | 89 | {.flags = 1ULL << VIRTIO_NET_F_MAC, |
ba550851 | 90 | .end = virtio_endof(struct virtio_net_config, mac)}, |
127833ee | 91 | {.flags = 1ULL << VIRTIO_NET_F_STATUS, |
ba550851 | 92 | .end = virtio_endof(struct virtio_net_config, status)}, |
127833ee | 93 | {.flags = 1ULL << VIRTIO_NET_F_MQ, |
ba550851 | 94 | .end = virtio_endof(struct virtio_net_config, max_virtqueue_pairs)}, |
127833ee | 95 | {.flags = 1ULL << VIRTIO_NET_F_MTU, |
ba550851 | 96 | .end = virtio_endof(struct virtio_net_config, mtu)}, |
9473939e | 97 | {.flags = 1ULL << VIRTIO_NET_F_SPEED_DUPLEX, |
ba550851 | 98 | .end = virtio_endof(struct virtio_net_config, duplex)}, |
14f9b664 JL |
99 | {} |
100 | }; | |
101 | ||
fed699f9 | 102 | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) |
0c87e93e JW |
103 | { |
104 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
105 | ||
fed699f9 | 106 | return &n->vqs[nc->queue_index]; |
0c87e93e | 107 | } |
fed699f9 JW |
108 | |
109 | static int vq2q(int queue_index) | |
110 | { | |
111 | return queue_index / 2; | |
112 | } | |
113 | ||
fbe78f4f AL |
114 | /* TODO |
115 | * - we could suppress RX interrupt if we were so inclined. | |
116 | */ | |
117 | ||
0f03eca6 | 118 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f | 119 | { |
17a0ca55 | 120 | VirtIONet *n = VIRTIO_NET(vdev); |
fbe78f4f AL |
121 | struct virtio_net_config netcfg; |
122 | ||
1399c60d RR |
123 | virtio_stw_p(vdev, &netcfg.status, n->status); |
124 | virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); | |
a93e599d | 125 | virtio_stw_p(vdev, &netcfg.mtu, n->net_conf.mtu); |
79674068 | 126 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
9473939e JB |
127 | virtio_stl_p(vdev, &netcfg.speed, n->net_conf.speed); |
128 | netcfg.duplex = n->net_conf.duplex; | |
14f9b664 | 129 | memcpy(config, &netcfg, n->config_size); |
fbe78f4f AL |
130 | } |
131 | ||
0f03eca6 AL |
132 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
133 | { | |
17a0ca55 | 134 | VirtIONet *n = VIRTIO_NET(vdev); |
14f9b664 | 135 | struct virtio_net_config netcfg = {}; |
0f03eca6 | 136 | |
14f9b664 | 137 | memcpy(&netcfg, config, n->config_size); |
0f03eca6 | 138 | |
95129d6f CH |
139 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) && |
140 | !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) && | |
c1943a3f | 141 | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
79674068 | 142 | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
b356f76d | 143 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
0f03eca6 AL |
144 | } |
145 | } | |
146 | ||
783e7706 MT |
147 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
148 | { | |
17a0ca55 | 149 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
783e7706 | 150 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && |
17a0ca55 | 151 | (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; |
783e7706 MT |
152 | } |
153 | ||
b2c929f0 DDAG |
154 | static void virtio_net_announce_notify(VirtIONet *net) |
155 | { | |
156 | VirtIODevice *vdev = VIRTIO_DEVICE(net); | |
157 | trace_virtio_net_announce_notify(); | |
158 | ||
159 | net->status |= VIRTIO_NET_S_ANNOUNCE; | |
160 | virtio_notify_config(vdev); | |
161 | } | |
162 | ||
f57fcf70 JW |
163 | static void virtio_net_announce_timer(void *opaque) |
164 | { | |
165 | VirtIONet *n = opaque; | |
9d8c6a25 | 166 | trace_virtio_net_announce_timer(n->announce_timer.round); |
f57fcf70 | 167 | |
9d8c6a25 | 168 | n->announce_timer.round--; |
b2c929f0 DDAG |
169 | virtio_net_announce_notify(n); |
170 | } | |
171 | ||
172 | static void virtio_net_announce(NetClientState *nc) | |
173 | { | |
174 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
175 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
176 | ||
177 | /* | |
178 | * Make sure the virtio migration announcement timer isn't running | |
179 | * If it is, let it trigger announcement so that we do not cause | |
180 | * confusion. | |
181 | */ | |
182 | if (n->announce_timer.round) { | |
183 | return; | |
184 | } | |
185 | ||
186 | if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && | |
187 | virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { | |
188 | virtio_net_announce_notify(n); | |
189 | } | |
f57fcf70 JW |
190 | } |
191 | ||
783e7706 | 192 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
afbaa7b4 | 193 | { |
17a0ca55 | 194 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b356f76d | 195 | NetClientState *nc = qemu_get_queue(n->nic); |
fed699f9 | 196 | int queues = n->multiqueue ? n->max_queues : 1; |
b356f76d | 197 | |
ed8b4afe | 198 | if (!get_vhost_net(nc->peer)) { |
afbaa7b4 MT |
199 | return; |
200 | } | |
fed699f9 | 201 | |
8c1ac475 RK |
202 | if ((virtio_net_started(n, status) && !nc->peer->link_down) == |
203 | !!n->vhost_started) { | |
afbaa7b4 MT |
204 | return; |
205 | } | |
206 | if (!n->vhost_started) { | |
086abc1c MT |
207 | int r, i; |
208 | ||
1bfa316c GK |
209 | if (n->needs_vnet_hdr_swap) { |
210 | error_report("backend does not support %s vnet headers; " | |
211 | "falling back on userspace virtio", | |
212 | virtio_is_big_endian(vdev) ? "BE" : "LE"); | |
213 | return; | |
214 | } | |
215 | ||
086abc1c MT |
216 | /* Any packets outstanding? Purge them to avoid touching rings |
217 | * when vhost is running. | |
218 | */ | |
219 | for (i = 0; i < queues; i++) { | |
220 | NetClientState *qnc = qemu_get_subqueue(n->nic, i); | |
221 | ||
222 | /* Purge both directions: TX and RX. */ | |
223 | qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); | |
224 | qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); | |
225 | } | |
226 | ||
a93e599d MC |
227 | if (virtio_has_feature(vdev->guest_features, VIRTIO_NET_F_MTU)) { |
228 | r = vhost_net_set_mtu(get_vhost_net(nc->peer), n->net_conf.mtu); | |
229 | if (r < 0) { | |
230 | error_report("%uBytes MTU not supported by the backend", | |
231 | n->net_conf.mtu); | |
232 | ||
233 | return; | |
234 | } | |
235 | } | |
236 | ||
1830b80f | 237 | n->vhost_started = 1; |
17a0ca55 | 238 | r = vhost_net_start(vdev, n->nic->ncs, queues); |
afbaa7b4 | 239 | if (r < 0) { |
e7b43f7e SH |
240 | error_report("unable to start vhost net: %d: " |
241 | "falling back on userspace virtio", -r); | |
1830b80f | 242 | n->vhost_started = 0; |
afbaa7b4 MT |
243 | } |
244 | } else { | |
17a0ca55 | 245 | vhost_net_stop(vdev, n->nic->ncs, queues); |
afbaa7b4 MT |
246 | n->vhost_started = 0; |
247 | } | |
248 | } | |
249 | ||
1bfa316c GK |
250 | static int virtio_net_set_vnet_endian_one(VirtIODevice *vdev, |
251 | NetClientState *peer, | |
252 | bool enable) | |
253 | { | |
254 | if (virtio_is_big_endian(vdev)) { | |
255 | return qemu_set_vnet_be(peer, enable); | |
256 | } else { | |
257 | return qemu_set_vnet_le(peer, enable); | |
258 | } | |
259 | } | |
260 | ||
261 | static bool virtio_net_set_vnet_endian(VirtIODevice *vdev, NetClientState *ncs, | |
262 | int queues, bool enable) | |
263 | { | |
264 | int i; | |
265 | ||
266 | for (i = 0; i < queues; i++) { | |
267 | if (virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, enable) < 0 && | |
268 | enable) { | |
269 | while (--i >= 0) { | |
270 | virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, false); | |
271 | } | |
272 | ||
273 | return true; | |
274 | } | |
275 | } | |
276 | ||
277 | return false; | |
278 | } | |
279 | ||
280 | static void virtio_net_vnet_endian_status(VirtIONet *n, uint8_t status) | |
281 | { | |
282 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
283 | int queues = n->multiqueue ? n->max_queues : 1; | |
284 | ||
285 | if (virtio_net_started(n, status)) { | |
286 | /* Before using the device, we tell the network backend about the | |
287 | * endianness to use when parsing vnet headers. If the backend | |
288 | * can't do it, we fallback onto fixing the headers in the core | |
289 | * virtio-net code. | |
290 | */ | |
291 | n->needs_vnet_hdr_swap = virtio_net_set_vnet_endian(vdev, n->nic->ncs, | |
292 | queues, true); | |
293 | } else if (virtio_net_started(n, vdev->status)) { | |
294 | /* After using the device, we need to reset the network backend to | |
295 | * the default (guest native endianness), otherwise the guest may | |
296 | * lose network connectivity if it is rebooted into a different | |
297 | * endianness. | |
298 | */ | |
299 | virtio_net_set_vnet_endian(vdev, n->nic->ncs, queues, false); | |
300 | } | |
301 | } | |
302 | ||
283e2c2a YB |
303 | static void virtio_net_drop_tx_queue_data(VirtIODevice *vdev, VirtQueue *vq) |
304 | { | |
305 | unsigned int dropped = virtqueue_drop_all(vq); | |
306 | if (dropped) { | |
307 | virtio_notify(vdev, vq); | |
308 | } | |
309 | } | |
310 | ||
783e7706 MT |
311 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
312 | { | |
17a0ca55 | 313 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
314 | VirtIONetQueue *q; |
315 | int i; | |
316 | uint8_t queue_status; | |
783e7706 | 317 | |
1bfa316c | 318 | virtio_net_vnet_endian_status(n, status); |
783e7706 MT |
319 | virtio_net_vhost_status(n, status); |
320 | ||
fed699f9 | 321 | for (i = 0; i < n->max_queues; i++) { |
38705bb5 FZ |
322 | NetClientState *ncs = qemu_get_subqueue(n->nic, i); |
323 | bool queue_started; | |
fed699f9 | 324 | q = &n->vqs[i]; |
783e7706 | 325 | |
fed699f9 JW |
326 | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
327 | queue_status = 0; | |
783e7706 | 328 | } else { |
fed699f9 | 329 | queue_status = status; |
783e7706 | 330 | } |
38705bb5 FZ |
331 | queue_started = |
332 | virtio_net_started(n, queue_status) && !n->vhost_started; | |
333 | ||
334 | if (queue_started) { | |
335 | qemu_flush_queued_packets(ncs); | |
336 | } | |
fed699f9 JW |
337 | |
338 | if (!q->tx_waiting) { | |
339 | continue; | |
340 | } | |
341 | ||
38705bb5 | 342 | if (queue_started) { |
fed699f9 | 343 | if (q->tx_timer) { |
bc72ad67 AB |
344 | timer_mod(q->tx_timer, |
345 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
fed699f9 JW |
346 | } else { |
347 | qemu_bh_schedule(q->tx_bh); | |
348 | } | |
783e7706 | 349 | } else { |
fed699f9 | 350 | if (q->tx_timer) { |
bc72ad67 | 351 | timer_del(q->tx_timer); |
fed699f9 JW |
352 | } else { |
353 | qemu_bh_cancel(q->tx_bh); | |
354 | } | |
283e2c2a | 355 | if ((n->status & VIRTIO_NET_S_LINK_UP) == 0 && |
70e53e6e JW |
356 | (queue_status & VIRTIO_CONFIG_S_DRIVER_OK) && |
357 | vdev->vm_running) { | |
283e2c2a YB |
358 | /* if tx is waiting we are likely have some packets in tx queue |
359 | * and disabled notification */ | |
360 | q->tx_waiting = 0; | |
361 | virtio_queue_set_notification(q->tx_vq, 1); | |
362 | virtio_net_drop_tx_queue_data(vdev, q->tx_vq); | |
363 | } | |
783e7706 MT |
364 | } |
365 | } | |
366 | } | |
367 | ||
4e68f7a0 | 368 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 369 | { |
cc1f0f45 | 370 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 371 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
554c97dd AL |
372 | uint16_t old_status = n->status; |
373 | ||
eb6b6c12 | 374 | if (nc->link_down) |
554c97dd AL |
375 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
376 | else | |
377 | n->status |= VIRTIO_NET_S_LINK_UP; | |
378 | ||
379 | if (n->status != old_status) | |
17a0ca55 | 380 | virtio_notify_config(vdev); |
afbaa7b4 | 381 | |
17a0ca55 | 382 | virtio_net_set_status(vdev, vdev->status); |
554c97dd AL |
383 | } |
384 | ||
b1be4280 AK |
385 | static void rxfilter_notify(NetClientState *nc) |
386 | { | |
b1be4280 AK |
387 | VirtIONet *n = qemu_get_nic_opaque(nc); |
388 | ||
389 | if (nc->rxfilter_notify_enabled) { | |
96e35046 | 390 | gchar *path = object_get_canonical_path(OBJECT(n->qdev)); |
06150279 | 391 | qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, |
3ab72385 | 392 | n->netclient_name, path); |
96e35046 | 393 | g_free(path); |
b1be4280 AK |
394 | |
395 | /* disable event notification to avoid events flooding */ | |
396 | nc->rxfilter_notify_enabled = 0; | |
397 | } | |
398 | } | |
399 | ||
f7bc8ef8 AK |
400 | static intList *get_vlan_table(VirtIONet *n) |
401 | { | |
402 | intList *list, *entry; | |
403 | int i, j; | |
404 | ||
405 | list = NULL; | |
406 | for (i = 0; i < MAX_VLAN >> 5; i++) { | |
407 | for (j = 0; n->vlans[i] && j <= 0x1f; j++) { | |
408 | if (n->vlans[i] & (1U << j)) { | |
409 | entry = g_malloc0(sizeof(*entry)); | |
410 | entry->value = (i << 5) + j; | |
411 | entry->next = list; | |
412 | list = entry; | |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | return list; | |
418 | } | |
419 | ||
b1be4280 AK |
420 | static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) |
421 | { | |
422 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
f7bc8ef8 | 423 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b1be4280 AK |
424 | RxFilterInfo *info; |
425 | strList *str_list, *entry; | |
f7bc8ef8 | 426 | int i; |
b1be4280 AK |
427 | |
428 | info = g_malloc0(sizeof(*info)); | |
429 | info->name = g_strdup(nc->name); | |
430 | info->promiscuous = n->promisc; | |
431 | ||
432 | if (n->nouni) { | |
433 | info->unicast = RX_STATE_NONE; | |
434 | } else if (n->alluni) { | |
435 | info->unicast = RX_STATE_ALL; | |
436 | } else { | |
437 | info->unicast = RX_STATE_NORMAL; | |
438 | } | |
439 | ||
440 | if (n->nomulti) { | |
441 | info->multicast = RX_STATE_NONE; | |
442 | } else if (n->allmulti) { | |
443 | info->multicast = RX_STATE_ALL; | |
444 | } else { | |
445 | info->multicast = RX_STATE_NORMAL; | |
446 | } | |
447 | ||
448 | info->broadcast_allowed = n->nobcast; | |
449 | info->multicast_overflow = n->mac_table.multi_overflow; | |
450 | info->unicast_overflow = n->mac_table.uni_overflow; | |
451 | ||
b0575ba4 | 452 | info->main_mac = qemu_mac_strdup_printf(n->mac); |
b1be4280 AK |
453 | |
454 | str_list = NULL; | |
455 | for (i = 0; i < n->mac_table.first_multi; i++) { | |
456 | entry = g_malloc0(sizeof(*entry)); | |
b0575ba4 | 457 | entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); |
b1be4280 AK |
458 | entry->next = str_list; |
459 | str_list = entry; | |
460 | } | |
461 | info->unicast_table = str_list; | |
462 | ||
463 | str_list = NULL; | |
464 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
465 | entry = g_malloc0(sizeof(*entry)); | |
b0575ba4 | 466 | entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); |
b1be4280 AK |
467 | entry->next = str_list; |
468 | str_list = entry; | |
469 | } | |
470 | info->multicast_table = str_list; | |
f7bc8ef8 | 471 | info->vlan_table = get_vlan_table(n); |
b1be4280 | 472 | |
95129d6f | 473 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) { |
f7bc8ef8 AK |
474 | info->vlan = RX_STATE_ALL; |
475 | } else if (!info->vlan_table) { | |
476 | info->vlan = RX_STATE_NONE; | |
477 | } else { | |
478 | info->vlan = RX_STATE_NORMAL; | |
b1be4280 | 479 | } |
b1be4280 AK |
480 | |
481 | /* enable event notification after query */ | |
482 | nc->rxfilter_notify_enabled = 1; | |
483 | ||
484 | return info; | |
485 | } | |
486 | ||
002437cd AL |
487 | static void virtio_net_reset(VirtIODevice *vdev) |
488 | { | |
17a0ca55 | 489 | VirtIONet *n = VIRTIO_NET(vdev); |
94b52958 | 490 | int i; |
002437cd AL |
491 | |
492 | /* Reset back to compatibility mode */ | |
493 | n->promisc = 1; | |
494 | n->allmulti = 0; | |
015cb166 AW |
495 | n->alluni = 0; |
496 | n->nomulti = 0; | |
497 | n->nouni = 0; | |
498 | n->nobcast = 0; | |
fed699f9 JW |
499 | /* multiqueue is disabled by default */ |
500 | n->curr_queues = 1; | |
9d8c6a25 DDAG |
501 | timer_del(n->announce_timer.tm); |
502 | n->announce_timer.round = 0; | |
f57fcf70 | 503 | n->status &= ~VIRTIO_NET_S_ANNOUNCE; |
b6503ed9 | 504 | |
f21c0ed9 | 505 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 506 | n->mac_table.in_use = 0; |
2d9aba39 | 507 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
508 | n->mac_table.multi_overflow = 0; |
509 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 510 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
41dc8a67 | 511 | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
702d66a8 | 512 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
f21c0ed9 | 513 | memset(n->vlans, 0, MAX_VLAN >> 3); |
94b52958 GK |
514 | |
515 | /* Flush any async TX */ | |
516 | for (i = 0; i < n->max_queues; i++) { | |
517 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
518 | ||
519 | if (nc->peer) { | |
520 | qemu_flush_or_purge_queued_packets(nc->peer, true); | |
521 | assert(!virtio_net_get_subqueue(nc)->async_tx.elem); | |
522 | } | |
523 | } | |
002437cd AL |
524 | } |
525 | ||
6e371ab8 | 526 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 527 | { |
b356f76d JW |
528 | NetClientState *nc = qemu_get_queue(n->nic); |
529 | if (!nc->peer) { | |
6e371ab8 | 530 | return; |
b356f76d | 531 | } |
3a330134 | 532 | |
d6085e3a | 533 | n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); |
6e371ab8 | 534 | } |
3a330134 | 535 | |
6e371ab8 MT |
536 | static int peer_has_vnet_hdr(VirtIONet *n) |
537 | { | |
3a330134 MM |
538 | return n->has_vnet_hdr; |
539 | } | |
540 | ||
0ce0e8f4 MM |
541 | static int peer_has_ufo(VirtIONet *n) |
542 | { | |
543 | if (!peer_has_vnet_hdr(n)) | |
544 | return 0; | |
545 | ||
d6085e3a | 546 | n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); |
0ce0e8f4 MM |
547 | |
548 | return n->has_ufo; | |
549 | } | |
550 | ||
bb9d17f8 CH |
551 | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs, |
552 | int version_1) | |
ff3a8066 | 553 | { |
fed699f9 JW |
554 | int i; |
555 | NetClientState *nc; | |
556 | ||
ff3a8066 MT |
557 | n->mergeable_rx_bufs = mergeable_rx_bufs; |
558 | ||
bb9d17f8 CH |
559 | if (version_1) { |
560 | n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); | |
561 | } else { | |
562 | n->guest_hdr_len = n->mergeable_rx_bufs ? | |
563 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : | |
564 | sizeof(struct virtio_net_hdr); | |
565 | } | |
ff3a8066 | 566 | |
fed699f9 JW |
567 | for (i = 0; i < n->max_queues; i++) { |
568 | nc = qemu_get_subqueue(n->nic, i); | |
569 | ||
570 | if (peer_has_vnet_hdr(n) && | |
d6085e3a SH |
571 | qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { |
572 | qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); | |
fed699f9 JW |
573 | n->host_hdr_len = n->guest_hdr_len; |
574 | } | |
ff3a8066 MT |
575 | } |
576 | } | |
577 | ||
2eef278b MT |
578 | static int virtio_net_max_tx_queue_size(VirtIONet *n) |
579 | { | |
580 | NetClientState *peer = n->nic_conf.peers.ncs[0]; | |
581 | ||
582 | /* | |
583 | * Backends other than vhost-user don't support max queue size. | |
584 | */ | |
585 | if (!peer) { | |
586 | return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE; | |
587 | } | |
588 | ||
589 | if (peer->info->type != NET_CLIENT_DRIVER_VHOST_USER) { | |
590 | return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE; | |
591 | } | |
592 | ||
593 | return VIRTQUEUE_MAX_SIZE; | |
594 | } | |
595 | ||
fed699f9 JW |
596 | static int peer_attach(VirtIONet *n, int index) |
597 | { | |
598 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
599 | ||
600 | if (!nc->peer) { | |
601 | return 0; | |
602 | } | |
603 | ||
f394b2e2 | 604 | if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) { |
7263a0ad CO |
605 | vhost_set_vring_enable(nc->peer, 1); |
606 | } | |
607 | ||
f394b2e2 | 608 | if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) { |
fed699f9 JW |
609 | return 0; |
610 | } | |
611 | ||
1074b879 JW |
612 | if (n->max_queues == 1) { |
613 | return 0; | |
614 | } | |
615 | ||
fed699f9 JW |
616 | return tap_enable(nc->peer); |
617 | } | |
618 | ||
619 | static int peer_detach(VirtIONet *n, int index) | |
620 | { | |
621 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
622 | ||
623 | if (!nc->peer) { | |
624 | return 0; | |
625 | } | |
626 | ||
f394b2e2 | 627 | if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) { |
7263a0ad CO |
628 | vhost_set_vring_enable(nc->peer, 0); |
629 | } | |
630 | ||
f394b2e2 | 631 | if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) { |
fed699f9 JW |
632 | return 0; |
633 | } | |
634 | ||
635 | return tap_disable(nc->peer); | |
636 | } | |
637 | ||
638 | static void virtio_net_set_queues(VirtIONet *n) | |
639 | { | |
640 | int i; | |
ddfa83ea | 641 | int r; |
fed699f9 | 642 | |
68b5f314 YB |
643 | if (n->nic->peer_deleted) { |
644 | return; | |
645 | } | |
646 | ||
fed699f9 JW |
647 | for (i = 0; i < n->max_queues; i++) { |
648 | if (i < n->curr_queues) { | |
ddfa83ea JS |
649 | r = peer_attach(n, i); |
650 | assert(!r); | |
fed699f9 | 651 | } else { |
ddfa83ea JS |
652 | r = peer_detach(n, i); |
653 | assert(!r); | |
fed699f9 JW |
654 | } |
655 | } | |
656 | } | |
657 | ||
ec57db16 | 658 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); |
fed699f9 | 659 | |
9d5b731d JW |
660 | static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features, |
661 | Error **errp) | |
fbe78f4f | 662 | { |
17a0ca55 | 663 | VirtIONet *n = VIRTIO_NET(vdev); |
b356f76d | 664 | NetClientState *nc = qemu_get_queue(n->nic); |
fbe78f4f | 665 | |
da3e8a23 SZ |
666 | /* Firstly sync all virtio-net possible supported features */ |
667 | features |= n->host_features; | |
668 | ||
0cd09c3a | 669 | virtio_add_feature(&features, VIRTIO_NET_F_MAC); |
c9f79a3f | 670 | |
6e371ab8 | 671 | if (!peer_has_vnet_hdr(n)) { |
0cd09c3a CH |
672 | virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); |
673 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); | |
674 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); | |
675 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); | |
8172539d | 676 | |
0cd09c3a CH |
677 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); |
678 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); | |
679 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); | |
680 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); | |
8172539d | 681 | } |
3a330134 | 682 | |
8172539d | 683 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
0cd09c3a CH |
684 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); |
685 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
686 | } |
687 | ||
ed8b4afe | 688 | if (!get_vhost_net(nc->peer)) { |
9bc6304c MT |
689 | return features; |
690 | } | |
2974e916 | 691 | |
75ebec11 MC |
692 | features = vhost_net_get_features(get_vhost_net(nc->peer), features); |
693 | vdev->backend_features = features; | |
694 | ||
695 | if (n->mtu_bypass_backend && | |
696 | (n->host_features & 1ULL << VIRTIO_NET_F_MTU)) { | |
697 | features |= (1ULL << VIRTIO_NET_F_MTU); | |
698 | } | |
699 | ||
700 | return features; | |
fbe78f4f AL |
701 | } |
702 | ||
019a3edb | 703 | static uint64_t virtio_net_bad_features(VirtIODevice *vdev) |
8eca6b1b | 704 | { |
019a3edb | 705 | uint64_t features = 0; |
8eca6b1b AL |
706 | |
707 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
708 | * but also these: */ | |
0cd09c3a CH |
709 | virtio_add_feature(&features, VIRTIO_NET_F_MAC); |
710 | virtio_add_feature(&features, VIRTIO_NET_F_CSUM); | |
711 | virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4); | |
712 | virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6); | |
713 | virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 714 | |
8172539d | 715 | return features; |
8eca6b1b AL |
716 | } |
717 | ||
644c9858 DF |
718 | static void virtio_net_apply_guest_offloads(VirtIONet *n) |
719 | { | |
ad37bb3b | 720 | qemu_set_offload(qemu_get_queue(n->nic)->peer, |
644c9858 DF |
721 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), |
722 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), | |
723 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), | |
724 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), | |
725 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); | |
726 | } | |
727 | ||
728 | static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) | |
729 | { | |
730 | static const uint64_t guest_offloads_mask = | |
731 | (1ULL << VIRTIO_NET_F_GUEST_CSUM) | | |
732 | (1ULL << VIRTIO_NET_F_GUEST_TSO4) | | |
733 | (1ULL << VIRTIO_NET_F_GUEST_TSO6) | | |
734 | (1ULL << VIRTIO_NET_F_GUEST_ECN) | | |
735 | (1ULL << VIRTIO_NET_F_GUEST_UFO); | |
736 | ||
737 | return guest_offloads_mask & features; | |
738 | } | |
739 | ||
740 | static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) | |
741 | { | |
742 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
743 | return virtio_net_guest_offloads_by_features(vdev->guest_features); | |
744 | } | |
745 | ||
d5aaa1b0 | 746 | static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) |
fbe78f4f | 747 | { |
17a0ca55 | 748 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
749 | int i; |
750 | ||
75ebec11 MC |
751 | if (n->mtu_bypass_backend && |
752 | !virtio_has_feature(vdev->backend_features, VIRTIO_NET_F_MTU)) { | |
753 | features &= ~(1ULL << VIRTIO_NET_F_MTU); | |
754 | } | |
755 | ||
ef546f12 | 756 | virtio_net_set_multiqueue(n, |
95129d6f | 757 | virtio_has_feature(features, VIRTIO_NET_F_MQ)); |
fbe78f4f | 758 | |
ef546f12 | 759 | virtio_net_set_mrg_rx_bufs(n, |
95129d6f CH |
760 | virtio_has_feature(features, |
761 | VIRTIO_NET_F_MRG_RXBUF), | |
762 | virtio_has_feature(features, | |
763 | VIRTIO_F_VERSION_1)); | |
f5436dd9 | 764 | |
2974e916 YB |
765 | n->rsc4_enabled = virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT) && |
766 | virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO4); | |
767 | n->rsc6_enabled = virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT) && | |
768 | virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO6); | |
769 | ||
f5436dd9 | 770 | if (n->has_vnet_hdr) { |
644c9858 DF |
771 | n->curr_guest_offloads = |
772 | virtio_net_guest_offloads_by_features(features); | |
773 | virtio_net_apply_guest_offloads(n); | |
f5436dd9 | 774 | } |
fed699f9 JW |
775 | |
776 | for (i = 0; i < n->max_queues; i++) { | |
777 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
778 | ||
ed8b4afe | 779 | if (!get_vhost_net(nc->peer)) { |
fed699f9 JW |
780 | continue; |
781 | } | |
ed8b4afe | 782 | vhost_net_ack_features(get_vhost_net(nc->peer), features); |
dc14a397 | 783 | } |
0b1eaa88 | 784 | |
95129d6f | 785 | if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { |
0b1eaa88 SF |
786 | memset(n->vlans, 0, MAX_VLAN >> 3); |
787 | } else { | |
788 | memset(n->vlans, 0xff, MAX_VLAN >> 3); | |
789 | } | |
fbe78f4f AL |
790 | } |
791 | ||
002437cd | 792 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 793 | struct iovec *iov, unsigned int iov_cnt) |
002437cd AL |
794 | { |
795 | uint8_t on; | |
921ac5d0 | 796 | size_t s; |
b1be4280 | 797 | NetClientState *nc = qemu_get_queue(n->nic); |
002437cd | 798 | |
921ac5d0 MT |
799 | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
800 | if (s != sizeof(on)) { | |
801 | return VIRTIO_NET_ERR; | |
002437cd AL |
802 | } |
803 | ||
dd23454b | 804 | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { |
002437cd | 805 | n->promisc = on; |
dd23454b | 806 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
002437cd | 807 | n->allmulti = on; |
dd23454b | 808 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
015cb166 | 809 | n->alluni = on; |
dd23454b | 810 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
015cb166 | 811 | n->nomulti = on; |
dd23454b | 812 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
015cb166 | 813 | n->nouni = on; |
dd23454b | 814 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
015cb166 | 815 | n->nobcast = on; |
921ac5d0 | 816 | } else { |
002437cd | 817 | return VIRTIO_NET_ERR; |
921ac5d0 | 818 | } |
002437cd | 819 | |
b1be4280 AK |
820 | rxfilter_notify(nc); |
821 | ||
002437cd AL |
822 | return VIRTIO_NET_OK; |
823 | } | |
824 | ||
644c9858 DF |
825 | static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, |
826 | struct iovec *iov, unsigned int iov_cnt) | |
827 | { | |
828 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
829 | uint64_t offloads; | |
830 | size_t s; | |
831 | ||
95129d6f | 832 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { |
644c9858 DF |
833 | return VIRTIO_NET_ERR; |
834 | } | |
835 | ||
836 | s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); | |
837 | if (s != sizeof(offloads)) { | |
838 | return VIRTIO_NET_ERR; | |
839 | } | |
840 | ||
841 | if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { | |
842 | uint64_t supported_offloads; | |
843 | ||
189ae6bb JW |
844 | offloads = virtio_ldq_p(vdev, &offloads); |
845 | ||
644c9858 DF |
846 | if (!n->has_vnet_hdr) { |
847 | return VIRTIO_NET_ERR; | |
848 | } | |
849 | ||
2974e916 YB |
850 | n->rsc4_enabled = virtio_has_feature(offloads, VIRTIO_NET_F_RSC_EXT) && |
851 | virtio_has_feature(offloads, VIRTIO_NET_F_GUEST_TSO4); | |
852 | n->rsc6_enabled = virtio_has_feature(offloads, VIRTIO_NET_F_RSC_EXT) && | |
853 | virtio_has_feature(offloads, VIRTIO_NET_F_GUEST_TSO6); | |
854 | virtio_clear_feature(&offloads, VIRTIO_NET_F_RSC_EXT); | |
855 | ||
644c9858 DF |
856 | supported_offloads = virtio_net_supported_guest_offloads(n); |
857 | if (offloads & ~supported_offloads) { | |
858 | return VIRTIO_NET_ERR; | |
859 | } | |
860 | ||
861 | n->curr_guest_offloads = offloads; | |
862 | virtio_net_apply_guest_offloads(n); | |
863 | ||
864 | return VIRTIO_NET_OK; | |
865 | } else { | |
866 | return VIRTIO_NET_ERR; | |
867 | } | |
868 | } | |
869 | ||
b6503ed9 | 870 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 871 | struct iovec *iov, unsigned int iov_cnt) |
b6503ed9 | 872 | { |
1399c60d | 873 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b6503ed9 | 874 | struct virtio_net_ctrl_mac mac_data; |
921ac5d0 | 875 | size_t s; |
b1be4280 | 876 | NetClientState *nc = qemu_get_queue(n->nic); |
b6503ed9 | 877 | |
c1943a3f AK |
878 | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { |
879 | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { | |
880 | return VIRTIO_NET_ERR; | |
881 | } | |
882 | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); | |
883 | assert(s == sizeof(n->mac)); | |
b356f76d | 884 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
b1be4280 AK |
885 | rxfilter_notify(nc); |
886 | ||
c1943a3f AK |
887 | return VIRTIO_NET_OK; |
888 | } | |
889 | ||
921ac5d0 | 890 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { |
b6503ed9 | 891 | return VIRTIO_NET_ERR; |
921ac5d0 | 892 | } |
b6503ed9 | 893 | |
cae2e556 AK |
894 | int in_use = 0; |
895 | int first_multi = 0; | |
896 | uint8_t uni_overflow = 0; | |
897 | uint8_t multi_overflow = 0; | |
898 | uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); | |
b6503ed9 | 899 | |
921ac5d0 MT |
900 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
901 | sizeof(mac_data.entries)); | |
1399c60d | 902 | mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); |
921ac5d0 | 903 | if (s != sizeof(mac_data.entries)) { |
b1be4280 | 904 | goto error; |
921ac5d0 MT |
905 | } |
906 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 907 | |
921ac5d0 | 908 | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { |
b1be4280 | 909 | goto error; |
921ac5d0 | 910 | } |
b6503ed9 AL |
911 | |
912 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
cae2e556 | 913 | s = iov_to_buf(iov, iov_cnt, 0, macs, |
921ac5d0 MT |
914 | mac_data.entries * ETH_ALEN); |
915 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 916 | goto error; |
921ac5d0 | 917 | } |
cae2e556 | 918 | in_use += mac_data.entries; |
b6503ed9 | 919 | } else { |
cae2e556 | 920 | uni_overflow = 1; |
b6503ed9 AL |
921 | } |
922 | ||
921ac5d0 MT |
923 | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
924 | ||
cae2e556 | 925 | first_multi = in_use; |
2d9aba39 | 926 | |
921ac5d0 MT |
927 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
928 | sizeof(mac_data.entries)); | |
1399c60d | 929 | mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); |
921ac5d0 | 930 | if (s != sizeof(mac_data.entries)) { |
b1be4280 | 931 | goto error; |
921ac5d0 MT |
932 | } |
933 | ||
934 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 935 | |
921ac5d0 | 936 | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { |
b1be4280 | 937 | goto error; |
921ac5d0 | 938 | } |
b6503ed9 | 939 | |
edc24385 | 940 | if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { |
cae2e556 | 941 | s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], |
921ac5d0 MT |
942 | mac_data.entries * ETH_ALEN); |
943 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 944 | goto error; |
8fd2a2f1 | 945 | } |
cae2e556 | 946 | in_use += mac_data.entries; |
921ac5d0 | 947 | } else { |
cae2e556 | 948 | multi_overflow = 1; |
b6503ed9 AL |
949 | } |
950 | ||
cae2e556 AK |
951 | n->mac_table.in_use = in_use; |
952 | n->mac_table.first_multi = first_multi; | |
953 | n->mac_table.uni_overflow = uni_overflow; | |
954 | n->mac_table.multi_overflow = multi_overflow; | |
955 | memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); | |
956 | g_free(macs); | |
b1be4280 AK |
957 | rxfilter_notify(nc); |
958 | ||
b6503ed9 | 959 | return VIRTIO_NET_OK; |
b1be4280 AK |
960 | |
961 | error: | |
cae2e556 | 962 | g_free(macs); |
b1be4280 | 963 | return VIRTIO_NET_ERR; |
b6503ed9 AL |
964 | } |
965 | ||
f21c0ed9 | 966 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 967 | struct iovec *iov, unsigned int iov_cnt) |
f21c0ed9 | 968 | { |
1399c60d | 969 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f21c0ed9 | 970 | uint16_t vid; |
921ac5d0 | 971 | size_t s; |
b1be4280 | 972 | NetClientState *nc = qemu_get_queue(n->nic); |
f21c0ed9 | 973 | |
921ac5d0 | 974 | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
1399c60d | 975 | vid = virtio_lduw_p(vdev, &vid); |
921ac5d0 | 976 | if (s != sizeof(vid)) { |
f21c0ed9 AL |
977 | return VIRTIO_NET_ERR; |
978 | } | |
979 | ||
f21c0ed9 AL |
980 | if (vid >= MAX_VLAN) |
981 | return VIRTIO_NET_ERR; | |
982 | ||
983 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
984 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
985 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
986 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
987 | else | |
988 | return VIRTIO_NET_ERR; | |
989 | ||
b1be4280 AK |
990 | rxfilter_notify(nc); |
991 | ||
f21c0ed9 AL |
992 | return VIRTIO_NET_OK; |
993 | } | |
994 | ||
f57fcf70 JW |
995 | static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, |
996 | struct iovec *iov, unsigned int iov_cnt) | |
997 | { | |
9d8c6a25 | 998 | trace_virtio_net_handle_announce(n->announce_timer.round); |
f57fcf70 JW |
999 | if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && |
1000 | n->status & VIRTIO_NET_S_ANNOUNCE) { | |
1001 | n->status &= ~VIRTIO_NET_S_ANNOUNCE; | |
9d8c6a25 DDAG |
1002 | if (n->announce_timer.round) { |
1003 | qemu_announce_timer_step(&n->announce_timer); | |
f57fcf70 JW |
1004 | } |
1005 | return VIRTIO_NET_OK; | |
1006 | } else { | |
1007 | return VIRTIO_NET_ERR; | |
1008 | } | |
1009 | } | |
1010 | ||
fed699f9 | 1011 | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
f8f7c533 | 1012 | struct iovec *iov, unsigned int iov_cnt) |
fed699f9 | 1013 | { |
17a0ca55 | 1014 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f8f7c533 JW |
1015 | struct virtio_net_ctrl_mq mq; |
1016 | size_t s; | |
1017 | uint16_t queues; | |
fed699f9 | 1018 | |
f8f7c533 JW |
1019 | s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); |
1020 | if (s != sizeof(mq)) { | |
fed699f9 JW |
1021 | return VIRTIO_NET_ERR; |
1022 | } | |
1023 | ||
1024 | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { | |
1025 | return VIRTIO_NET_ERR; | |
1026 | } | |
1027 | ||
1399c60d | 1028 | queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); |
fed699f9 | 1029 | |
f8f7c533 JW |
1030 | if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || |
1031 | queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
1032 | queues > n->max_queues || | |
fed699f9 JW |
1033 | !n->multiqueue) { |
1034 | return VIRTIO_NET_ERR; | |
1035 | } | |
1036 | ||
f8f7c533 | 1037 | n->curr_queues = queues; |
fed699f9 JW |
1038 | /* stop the backend before changing the number of queues to avoid handling a |
1039 | * disabled queue */ | |
17a0ca55 | 1040 | virtio_net_set_status(vdev, vdev->status); |
fed699f9 JW |
1041 | virtio_net_set_queues(n); |
1042 | ||
1043 | return VIRTIO_NET_OK; | |
1044 | } | |
ba7eadb5 | 1045 | |
3d11d36c AL |
1046 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
1047 | { | |
17a0ca55 | 1048 | VirtIONet *n = VIRTIO_NET(vdev); |
3d11d36c AL |
1049 | struct virtio_net_ctrl_hdr ctrl; |
1050 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
51b19ebe | 1051 | VirtQueueElement *elem; |
921ac5d0 | 1052 | size_t s; |
771b6ed3 | 1053 | struct iovec *iov, *iov2; |
921ac5d0 | 1054 | unsigned int iov_cnt; |
3d11d36c | 1055 | |
51b19ebe PB |
1056 | for (;;) { |
1057 | elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); | |
1058 | if (!elem) { | |
1059 | break; | |
1060 | } | |
1061 | if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) || | |
1062 | iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) { | |
ba7eadb5 GK |
1063 | virtio_error(vdev, "virtio-net ctrl missing headers"); |
1064 | virtqueue_detach_element(vq, elem, 0); | |
1065 | g_free(elem); | |
1066 | break; | |
3d11d36c AL |
1067 | } |
1068 | ||
51b19ebe PB |
1069 | iov_cnt = elem->out_num; |
1070 | iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num); | |
921ac5d0 MT |
1071 | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); |
1072 | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); | |
1073 | if (s != sizeof(ctrl)) { | |
1074 | status = VIRTIO_NET_ERR; | |
dd23454b | 1075 | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
921ac5d0 MT |
1076 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
1077 | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { | |
1078 | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); | |
1079 | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { | |
1080 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); | |
f57fcf70 JW |
1081 | } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { |
1082 | status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); | |
fed699f9 | 1083 | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
f8f7c533 | 1084 | status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); |
644c9858 DF |
1085 | } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { |
1086 | status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); | |
3d11d36c AL |
1087 | } |
1088 | ||
51b19ebe | 1089 | s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status)); |
921ac5d0 | 1090 | assert(s == sizeof(status)); |
3d11d36c | 1091 | |
51b19ebe | 1092 | virtqueue_push(vq, elem, sizeof(status)); |
3d11d36c | 1093 | virtio_notify(vdev, vq); |
771b6ed3 | 1094 | g_free(iov2); |
51b19ebe | 1095 | g_free(elem); |
3d11d36c AL |
1096 | } |
1097 | } | |
1098 | ||
fbe78f4f AL |
1099 | /* RX */ |
1100 | ||
1101 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
1102 | { | |
17a0ca55 | 1103 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1104 | int queue_index = vq2q(virtio_get_queue_index(vq)); |
8aeff62d | 1105 | |
fed699f9 | 1106 | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
fbe78f4f AL |
1107 | } |
1108 | ||
4e68f7a0 | 1109 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 1110 | { |
cc1f0f45 | 1111 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 1112 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fed699f9 | 1113 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
0c87e93e | 1114 | |
17a0ca55 | 1115 | if (!vdev->vm_running) { |
95477323 MT |
1116 | return 0; |
1117 | } | |
cdd5cc12 | 1118 | |
fed699f9 JW |
1119 | if (nc->queue_index >= n->curr_queues) { |
1120 | return 0; | |
1121 | } | |
1122 | ||
0c87e93e | 1123 | if (!virtio_queue_ready(q->rx_vq) || |
17a0ca55 | 1124 | !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 1125 | return 0; |
0c87e93e | 1126 | } |
fbe78f4f | 1127 | |
cdd5cc12 MM |
1128 | return 1; |
1129 | } | |
1130 | ||
0c87e93e | 1131 | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
cdd5cc12 | 1132 | { |
0c87e93e JW |
1133 | VirtIONet *n = q->n; |
1134 | if (virtio_queue_empty(q->rx_vq) || | |
fbe78f4f | 1135 | (n->mergeable_rx_bufs && |
0c87e93e JW |
1136 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
1137 | virtio_queue_set_notification(q->rx_vq, 1); | |
06b12970 TL |
1138 | |
1139 | /* To avoid a race condition where the guest has made some buffers | |
1140 | * available after the above check but before notification was | |
1141 | * enabled, check for available buffers again. | |
1142 | */ | |
0c87e93e | 1143 | if (virtio_queue_empty(q->rx_vq) || |
06b12970 | 1144 | (n->mergeable_rx_bufs && |
0c87e93e | 1145 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
06b12970 | 1146 | return 0; |
0c87e93e | 1147 | } |
fbe78f4f AL |
1148 | } |
1149 | ||
0c87e93e | 1150 | virtio_queue_set_notification(q->rx_vq, 0); |
fbe78f4f AL |
1151 | return 1; |
1152 | } | |
1153 | ||
1399c60d | 1154 | static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) |
032a74a1 | 1155 | { |
1399c60d RR |
1156 | virtio_tswap16s(vdev, &hdr->hdr_len); |
1157 | virtio_tswap16s(vdev, &hdr->gso_size); | |
1158 | virtio_tswap16s(vdev, &hdr->csum_start); | |
1159 | virtio_tswap16s(vdev, &hdr->csum_offset); | |
032a74a1 CLG |
1160 | } |
1161 | ||
1d41b0c1 AL |
1162 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
1163 | * it never finds out that the packets don't have valid checksums. This | |
1164 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
1165 | * fix this with Xen but it hasn't appeared in an upstream release of | |
1166 | * dhclient yet. | |
1167 | * | |
1168 | * To avoid breaking existing guests, we catch udp packets and add | |
1169 | * checksums. This is terrible but it's better than hacking the guest | |
1170 | * kernels. | |
1171 | * | |
1172 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
1173 | * we should provide a mechanism to disable it to avoid polluting the host | |
1174 | * cache. | |
1175 | */ | |
1176 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 1177 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
1178 | { |
1179 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
1180 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
1181 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
1182 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
1183 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 1184 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
1185 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
1186 | } | |
1187 | } | |
1188 | ||
280598b7 MT |
1189 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
1190 | const void *buf, size_t size) | |
fbe78f4f | 1191 | { |
3a330134 | 1192 | if (n->has_vnet_hdr) { |
22cc84db MT |
1193 | /* FIXME this cast is evil */ |
1194 | void *wbuf = (void *)buf; | |
280598b7 MT |
1195 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
1196 | size - n->host_hdr_len); | |
1bfa316c GK |
1197 | |
1198 | if (n->needs_vnet_hdr_swap) { | |
1199 | virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); | |
1200 | } | |
280598b7 | 1201 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); |
22cc84db MT |
1202 | } else { |
1203 | struct virtio_net_hdr hdr = { | |
1204 | .flags = 0, | |
1205 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
1206 | }; | |
1207 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 1208 | } |
fbe78f4f AL |
1209 | } |
1210 | ||
3831ab20 AL |
1211 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
1212 | { | |
1213 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 1214 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 1215 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 1216 | int i; |
3831ab20 AL |
1217 | |
1218 | if (n->promisc) | |
1219 | return 1; | |
1220 | ||
e043ebc6 | 1221 | ptr += n->host_hdr_len; |
3a330134 | 1222 | |
f21c0ed9 | 1223 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
7542d3e7 | 1224 | int vid = lduw_be_p(ptr + 14) & 0xfff; |
f21c0ed9 AL |
1225 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
1226 | return 0; | |
1227 | } | |
1228 | ||
bbe2f399 AW |
1229 | if (ptr[0] & 1) { // multicast |
1230 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
1231 | return !n->nobcast; |
1232 | } else if (n->nomulti) { | |
1233 | return 0; | |
8fd2a2f1 | 1234 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
1235 | return 1; |
1236 | } | |
2d9aba39 AW |
1237 | |
1238 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
1239 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
1240 | return 1; | |
1241 | } | |
1242 | } | |
bbe2f399 | 1243 | } else { // unicast |
015cb166 AW |
1244 | if (n->nouni) { |
1245 | return 0; | |
1246 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
1247 | return 1; |
1248 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
1249 | return 1; |
1250 | } | |
3831ab20 | 1251 | |
2d9aba39 AW |
1252 | for (i = 0; i < n->mac_table.first_multi; i++) { |
1253 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
1254 | return 1; | |
1255 | } | |
1256 | } | |
b6503ed9 AL |
1257 | } |
1258 | ||
3831ab20 AL |
1259 | return 0; |
1260 | } | |
1261 | ||
97cd965c PB |
1262 | static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf, |
1263 | size_t size) | |
fbe78f4f | 1264 | { |
cc1f0f45 | 1265 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1266 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1267 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
63c58728 MT |
1268 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
1269 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
1270 | unsigned mhdr_cnt = 0; | |
22cc84db | 1271 | size_t offset, i, guest_offset; |
fbe78f4f | 1272 | |
fed699f9 | 1273 | if (!virtio_net_can_receive(nc)) { |
cdd5cc12 | 1274 | return -1; |
b356f76d | 1275 | } |
cdd5cc12 | 1276 | |
940cda94 | 1277 | /* hdr_len refers to the header we supply to the guest */ |
0c87e93e | 1278 | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { |
8aeff62d | 1279 | return 0; |
0c87e93e | 1280 | } |
fbe78f4f | 1281 | |
3831ab20 | 1282 | if (!receive_filter(n, buf, size)) |
4f1c942b | 1283 | return size; |
3831ab20 | 1284 | |
fbe78f4f AL |
1285 | offset = i = 0; |
1286 | ||
1287 | while (offset < size) { | |
51b19ebe | 1288 | VirtQueueElement *elem; |
fbe78f4f | 1289 | int len, total; |
51b19ebe | 1290 | const struct iovec *sg; |
fbe78f4f | 1291 | |
22c253d9 | 1292 | total = 0; |
fbe78f4f | 1293 | |
51b19ebe PB |
1294 | elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement)); |
1295 | if (!elem) { | |
ba10b9c0 GK |
1296 | if (i) { |
1297 | virtio_error(vdev, "virtio-net unexpected empty queue: " | |
1298 | "i %zd mergeable %d offset %zd, size %zd, " | |
1299 | "guest hdr len %zd, host hdr len %zd " | |
1300 | "guest features 0x%" PRIx64, | |
1301 | i, n->mergeable_rx_bufs, offset, size, | |
1302 | n->guest_hdr_len, n->host_hdr_len, | |
1303 | vdev->guest_features); | |
1304 | } | |
1305 | return -1; | |
fbe78f4f AL |
1306 | } |
1307 | ||
51b19ebe | 1308 | if (elem->in_num < 1) { |
ba10b9c0 GK |
1309 | virtio_error(vdev, |
1310 | "virtio-net receive queue contains no in buffers"); | |
1311 | virtqueue_detach_element(q->rx_vq, elem, 0); | |
1312 | g_free(elem); | |
1313 | return -1; | |
fbe78f4f AL |
1314 | } |
1315 | ||
51b19ebe | 1316 | sg = elem->in_sg; |
fbe78f4f | 1317 | if (i == 0) { |
c8d28e7e | 1318 | assert(offset == 0); |
63c58728 MT |
1319 | if (n->mergeable_rx_bufs) { |
1320 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
51b19ebe | 1321 | sg, elem->in_num, |
63c58728 MT |
1322 | offsetof(typeof(mhdr), num_buffers), |
1323 | sizeof(mhdr.num_buffers)); | |
1324 | } | |
fbe78f4f | 1325 | |
51b19ebe | 1326 | receive_header(n, sg, elem->in_num, buf, size); |
c8d28e7e | 1327 | offset = n->host_hdr_len; |
e35e23f6 | 1328 | total += n->guest_hdr_len; |
22cc84db MT |
1329 | guest_offset = n->guest_hdr_len; |
1330 | } else { | |
1331 | guest_offset = 0; | |
fbe78f4f AL |
1332 | } |
1333 | ||
1334 | /* copy in packet. ugh */ | |
51b19ebe | 1335 | len = iov_from_buf(sg, elem->in_num, guest_offset, |
dcf6f5e1 | 1336 | buf + offset, size - offset); |
fbe78f4f | 1337 | total += len; |
279a4253 MT |
1338 | offset += len; |
1339 | /* If buffers can't be merged, at this point we | |
1340 | * must have consumed the complete packet. | |
1341 | * Otherwise, drop it. */ | |
1342 | if (!n->mergeable_rx_bufs && offset < size) { | |
27e57efe | 1343 | virtqueue_unpop(q->rx_vq, elem, total); |
51b19ebe | 1344 | g_free(elem); |
279a4253 MT |
1345 | return size; |
1346 | } | |
fbe78f4f AL |
1347 | |
1348 | /* signal other side */ | |
51b19ebe PB |
1349 | virtqueue_fill(q->rx_vq, elem, total, i++); |
1350 | g_free(elem); | |
fbe78f4f AL |
1351 | } |
1352 | ||
63c58728 | 1353 | if (mhdr_cnt) { |
1399c60d | 1354 | virtio_stw_p(vdev, &mhdr.num_buffers, i); |
63c58728 MT |
1355 | iov_from_buf(mhdr_sg, mhdr_cnt, |
1356 | 0, | |
1357 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 1358 | } |
fbe78f4f | 1359 | |
0c87e93e | 1360 | virtqueue_flush(q->rx_vq, i); |
17a0ca55 | 1361 | virtio_notify(vdev, q->rx_vq); |
4f1c942b MM |
1362 | |
1363 | return size; | |
fbe78f4f AL |
1364 | } |
1365 | ||
2974e916 | 1366 | static ssize_t virtio_net_do_receive(NetClientState *nc, const uint8_t *buf, |
97cd965c PB |
1367 | size_t size) |
1368 | { | |
1369 | ssize_t r; | |
1370 | ||
1371 | rcu_read_lock(); | |
1372 | r = virtio_net_receive_rcu(nc, buf, size); | |
1373 | rcu_read_unlock(); | |
1374 | return r; | |
1375 | } | |
1376 | ||
2974e916 YB |
1377 | static void virtio_net_rsc_extract_unit4(VirtioNetRscChain *chain, |
1378 | const uint8_t *buf, | |
1379 | VirtioNetRscUnit *unit) | |
1380 | { | |
1381 | uint16_t ip_hdrlen; | |
1382 | struct ip_header *ip; | |
1383 | ||
1384 | ip = (struct ip_header *)(buf + chain->n->guest_hdr_len | |
1385 | + sizeof(struct eth_header)); | |
1386 | unit->ip = (void *)ip; | |
1387 | ip_hdrlen = (ip->ip_ver_len & 0xF) << 2; | |
1388 | unit->ip_plen = &ip->ip_len; | |
1389 | unit->tcp = (struct tcp_header *)(((uint8_t *)unit->ip) + ip_hdrlen); | |
1390 | unit->tcp_hdrlen = (htons(unit->tcp->th_offset_flags) & 0xF000) >> 10; | |
1391 | unit->payload = htons(*unit->ip_plen) - ip_hdrlen - unit->tcp_hdrlen; | |
1392 | } | |
1393 | ||
1394 | static void virtio_net_rsc_extract_unit6(VirtioNetRscChain *chain, | |
1395 | const uint8_t *buf, | |
1396 | VirtioNetRscUnit *unit) | |
1397 | { | |
1398 | struct ip6_header *ip6; | |
1399 | ||
1400 | ip6 = (struct ip6_header *)(buf + chain->n->guest_hdr_len | |
1401 | + sizeof(struct eth_header)); | |
1402 | unit->ip = ip6; | |
1403 | unit->ip_plen = &(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen); | |
1404 | unit->tcp = (struct tcp_header *)(((uint8_t *)unit->ip)\ | |
1405 | + sizeof(struct ip6_header)); | |
1406 | unit->tcp_hdrlen = (htons(unit->tcp->th_offset_flags) & 0xF000) >> 10; | |
1407 | ||
1408 | /* There is a difference between payload lenght in ipv4 and v6, | |
1409 | ip header is excluded in ipv6 */ | |
1410 | unit->payload = htons(*unit->ip_plen) - unit->tcp_hdrlen; | |
1411 | } | |
1412 | ||
1413 | static size_t virtio_net_rsc_drain_seg(VirtioNetRscChain *chain, | |
1414 | VirtioNetRscSeg *seg) | |
1415 | { | |
1416 | int ret; | |
1417 | struct virtio_net_hdr *h; | |
1418 | ||
1419 | h = (struct virtio_net_hdr *)seg->buf; | |
1420 | h->flags = 0; | |
1421 | h->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
1422 | ||
1423 | if (seg->is_coalesced) { | |
1424 | *virtio_net_rsc_ext_num_packets(h) = seg->packets; | |
1425 | *virtio_net_rsc_ext_num_dupacks(h) = seg->dup_ack; | |
1426 | h->flags = VIRTIO_NET_HDR_F_RSC_INFO; | |
1427 | if (chain->proto == ETH_P_IP) { | |
1428 | h->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; | |
1429 | } else { | |
1430 | h->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | ret = virtio_net_do_receive(seg->nc, seg->buf, seg->size); | |
1435 | QTAILQ_REMOVE(&chain->buffers, seg, next); | |
1436 | g_free(seg->buf); | |
1437 | g_free(seg); | |
1438 | ||
1439 | return ret; | |
1440 | } | |
1441 | ||
1442 | static void virtio_net_rsc_purge(void *opq) | |
1443 | { | |
1444 | VirtioNetRscSeg *seg, *rn; | |
1445 | VirtioNetRscChain *chain = (VirtioNetRscChain *)opq; | |
1446 | ||
1447 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn) { | |
1448 | if (virtio_net_rsc_drain_seg(chain, seg) == 0) { | |
1449 | chain->stat.purge_failed++; | |
1450 | continue; | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | chain->stat.timer++; | |
1455 | if (!QTAILQ_EMPTY(&chain->buffers)) { | |
1456 | timer_mod(chain->drain_timer, | |
1457 | qemu_clock_get_ns(QEMU_CLOCK_HOST) + chain->n->rsc_timeout); | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | static void virtio_net_rsc_cleanup(VirtIONet *n) | |
1462 | { | |
1463 | VirtioNetRscChain *chain, *rn_chain; | |
1464 | VirtioNetRscSeg *seg, *rn_seg; | |
1465 | ||
1466 | QTAILQ_FOREACH_SAFE(chain, &n->rsc_chains, next, rn_chain) { | |
1467 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn_seg) { | |
1468 | QTAILQ_REMOVE(&chain->buffers, seg, next); | |
1469 | g_free(seg->buf); | |
1470 | g_free(seg); | |
1471 | } | |
1472 | ||
1473 | timer_del(chain->drain_timer); | |
1474 | timer_free(chain->drain_timer); | |
1475 | QTAILQ_REMOVE(&n->rsc_chains, chain, next); | |
1476 | g_free(chain); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | static void virtio_net_rsc_cache_buf(VirtioNetRscChain *chain, | |
1481 | NetClientState *nc, | |
1482 | const uint8_t *buf, size_t size) | |
1483 | { | |
1484 | uint16_t hdr_len; | |
1485 | VirtioNetRscSeg *seg; | |
1486 | ||
1487 | hdr_len = chain->n->guest_hdr_len; | |
1488 | seg = g_malloc(sizeof(VirtioNetRscSeg)); | |
1489 | seg->buf = g_malloc(hdr_len + sizeof(struct eth_header) | |
1490 | + sizeof(struct ip6_header) + VIRTIO_NET_MAX_TCP_PAYLOAD); | |
1491 | memcpy(seg->buf, buf, size); | |
1492 | seg->size = size; | |
1493 | seg->packets = 1; | |
1494 | seg->dup_ack = 0; | |
1495 | seg->is_coalesced = 0; | |
1496 | seg->nc = nc; | |
1497 | ||
1498 | QTAILQ_INSERT_TAIL(&chain->buffers, seg, next); | |
1499 | chain->stat.cache++; | |
1500 | ||
1501 | switch (chain->proto) { | |
1502 | case ETH_P_IP: | |
1503 | virtio_net_rsc_extract_unit4(chain, seg->buf, &seg->unit); | |
1504 | break; | |
1505 | case ETH_P_IPV6: | |
1506 | virtio_net_rsc_extract_unit6(chain, seg->buf, &seg->unit); | |
1507 | break; | |
1508 | default: | |
1509 | g_assert_not_reached(); | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | static int32_t virtio_net_rsc_handle_ack(VirtioNetRscChain *chain, | |
1514 | VirtioNetRscSeg *seg, | |
1515 | const uint8_t *buf, | |
1516 | struct tcp_header *n_tcp, | |
1517 | struct tcp_header *o_tcp) | |
1518 | { | |
1519 | uint32_t nack, oack; | |
1520 | uint16_t nwin, owin; | |
1521 | ||
1522 | nack = htonl(n_tcp->th_ack); | |
1523 | nwin = htons(n_tcp->th_win); | |
1524 | oack = htonl(o_tcp->th_ack); | |
1525 | owin = htons(o_tcp->th_win); | |
1526 | ||
1527 | if ((nack - oack) >= VIRTIO_NET_MAX_TCP_PAYLOAD) { | |
1528 | chain->stat.ack_out_of_win++; | |
1529 | return RSC_FINAL; | |
1530 | } else if (nack == oack) { | |
1531 | /* duplicated ack or window probe */ | |
1532 | if (nwin == owin) { | |
1533 | /* duplicated ack, add dup ack count due to whql test up to 1 */ | |
1534 | chain->stat.dup_ack++; | |
1535 | return RSC_FINAL; | |
1536 | } else { | |
1537 | /* Coalesce window update */ | |
1538 | o_tcp->th_win = n_tcp->th_win; | |
1539 | chain->stat.win_update++; | |
1540 | return RSC_COALESCE; | |
1541 | } | |
1542 | } else { | |
1543 | /* pure ack, go to 'C', finalize*/ | |
1544 | chain->stat.pure_ack++; | |
1545 | return RSC_FINAL; | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | static int32_t virtio_net_rsc_coalesce_data(VirtioNetRscChain *chain, | |
1550 | VirtioNetRscSeg *seg, | |
1551 | const uint8_t *buf, | |
1552 | VirtioNetRscUnit *n_unit) | |
1553 | { | |
1554 | void *data; | |
1555 | uint16_t o_ip_len; | |
1556 | uint32_t nseq, oseq; | |
1557 | VirtioNetRscUnit *o_unit; | |
1558 | ||
1559 | o_unit = &seg->unit; | |
1560 | o_ip_len = htons(*o_unit->ip_plen); | |
1561 | nseq = htonl(n_unit->tcp->th_seq); | |
1562 | oseq = htonl(o_unit->tcp->th_seq); | |
1563 | ||
1564 | /* out of order or retransmitted. */ | |
1565 | if ((nseq - oseq) > VIRTIO_NET_MAX_TCP_PAYLOAD) { | |
1566 | chain->stat.data_out_of_win++; | |
1567 | return RSC_FINAL; | |
1568 | } | |
1569 | ||
1570 | data = ((uint8_t *)n_unit->tcp) + n_unit->tcp_hdrlen; | |
1571 | if (nseq == oseq) { | |
1572 | if ((o_unit->payload == 0) && n_unit->payload) { | |
1573 | /* From no payload to payload, normal case, not a dup ack or etc */ | |
1574 | chain->stat.data_after_pure_ack++; | |
1575 | goto coalesce; | |
1576 | } else { | |
1577 | return virtio_net_rsc_handle_ack(chain, seg, buf, | |
1578 | n_unit->tcp, o_unit->tcp); | |
1579 | } | |
1580 | } else if ((nseq - oseq) != o_unit->payload) { | |
1581 | /* Not a consistent packet, out of order */ | |
1582 | chain->stat.data_out_of_order++; | |
1583 | return RSC_FINAL; | |
1584 | } else { | |
1585 | coalesce: | |
1586 | if ((o_ip_len + n_unit->payload) > chain->max_payload) { | |
1587 | chain->stat.over_size++; | |
1588 | return RSC_FINAL; | |
1589 | } | |
1590 | ||
1591 | /* Here comes the right data, the payload length in v4/v6 is different, | |
1592 | so use the field value to update and record the new data len */ | |
1593 | o_unit->payload += n_unit->payload; /* update new data len */ | |
1594 | ||
1595 | /* update field in ip header */ | |
1596 | *o_unit->ip_plen = htons(o_ip_len + n_unit->payload); | |
1597 | ||
1598 | /* Bring 'PUSH' big, the whql test guide says 'PUSH' can be coalesced | |
1599 | for windows guest, while this may change the behavior for linux | |
1600 | guest (only if it uses RSC feature). */ | |
1601 | o_unit->tcp->th_offset_flags = n_unit->tcp->th_offset_flags; | |
1602 | ||
1603 | o_unit->tcp->th_ack = n_unit->tcp->th_ack; | |
1604 | o_unit->tcp->th_win = n_unit->tcp->th_win; | |
1605 | ||
1606 | memmove(seg->buf + seg->size, data, n_unit->payload); | |
1607 | seg->size += n_unit->payload; | |
1608 | seg->packets++; | |
1609 | chain->stat.coalesced++; | |
1610 | return RSC_COALESCE; | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | static int32_t virtio_net_rsc_coalesce4(VirtioNetRscChain *chain, | |
1615 | VirtioNetRscSeg *seg, | |
1616 | const uint8_t *buf, size_t size, | |
1617 | VirtioNetRscUnit *unit) | |
1618 | { | |
1619 | struct ip_header *ip1, *ip2; | |
1620 | ||
1621 | ip1 = (struct ip_header *)(unit->ip); | |
1622 | ip2 = (struct ip_header *)(seg->unit.ip); | |
1623 | if ((ip1->ip_src ^ ip2->ip_src) || (ip1->ip_dst ^ ip2->ip_dst) | |
1624 | || (unit->tcp->th_sport ^ seg->unit.tcp->th_sport) | |
1625 | || (unit->tcp->th_dport ^ seg->unit.tcp->th_dport)) { | |
1626 | chain->stat.no_match++; | |
1627 | return RSC_NO_MATCH; | |
1628 | } | |
1629 | ||
1630 | return virtio_net_rsc_coalesce_data(chain, seg, buf, unit); | |
1631 | } | |
1632 | ||
1633 | static int32_t virtio_net_rsc_coalesce6(VirtioNetRscChain *chain, | |
1634 | VirtioNetRscSeg *seg, | |
1635 | const uint8_t *buf, size_t size, | |
1636 | VirtioNetRscUnit *unit) | |
1637 | { | |
1638 | struct ip6_header *ip1, *ip2; | |
1639 | ||
1640 | ip1 = (struct ip6_header *)(unit->ip); | |
1641 | ip2 = (struct ip6_header *)(seg->unit.ip); | |
1642 | if (memcmp(&ip1->ip6_src, &ip2->ip6_src, sizeof(struct in6_address)) | |
1643 | || memcmp(&ip1->ip6_dst, &ip2->ip6_dst, sizeof(struct in6_address)) | |
1644 | || (unit->tcp->th_sport ^ seg->unit.tcp->th_sport) | |
1645 | || (unit->tcp->th_dport ^ seg->unit.tcp->th_dport)) { | |
1646 | chain->stat.no_match++; | |
1647 | return RSC_NO_MATCH; | |
1648 | } | |
1649 | ||
1650 | return virtio_net_rsc_coalesce_data(chain, seg, buf, unit); | |
1651 | } | |
1652 | ||
1653 | /* Packets with 'SYN' should bypass, other flag should be sent after drain | |
1654 | * to prevent out of order */ | |
1655 | static int virtio_net_rsc_tcp_ctrl_check(VirtioNetRscChain *chain, | |
1656 | struct tcp_header *tcp) | |
1657 | { | |
1658 | uint16_t tcp_hdr; | |
1659 | uint16_t tcp_flag; | |
1660 | ||
1661 | tcp_flag = htons(tcp->th_offset_flags); | |
1662 | tcp_hdr = (tcp_flag & VIRTIO_NET_TCP_HDR_LENGTH) >> 10; | |
1663 | tcp_flag &= VIRTIO_NET_TCP_FLAG; | |
1664 | tcp_flag = htons(tcp->th_offset_flags) & 0x3F; | |
1665 | if (tcp_flag & TH_SYN) { | |
1666 | chain->stat.tcp_syn++; | |
1667 | return RSC_BYPASS; | |
1668 | } | |
1669 | ||
1670 | if (tcp_flag & (TH_FIN | TH_URG | TH_RST | TH_ECE | TH_CWR)) { | |
1671 | chain->stat.tcp_ctrl_drain++; | |
1672 | return RSC_FINAL; | |
1673 | } | |
1674 | ||
1675 | if (tcp_hdr > sizeof(struct tcp_header)) { | |
1676 | chain->stat.tcp_all_opt++; | |
1677 | return RSC_FINAL; | |
1678 | } | |
1679 | ||
1680 | return RSC_CANDIDATE; | |
1681 | } | |
1682 | ||
1683 | static size_t virtio_net_rsc_do_coalesce(VirtioNetRscChain *chain, | |
1684 | NetClientState *nc, | |
1685 | const uint8_t *buf, size_t size, | |
1686 | VirtioNetRscUnit *unit) | |
1687 | { | |
1688 | int ret; | |
1689 | VirtioNetRscSeg *seg, *nseg; | |
1690 | ||
1691 | if (QTAILQ_EMPTY(&chain->buffers)) { | |
1692 | chain->stat.empty_cache++; | |
1693 | virtio_net_rsc_cache_buf(chain, nc, buf, size); | |
1694 | timer_mod(chain->drain_timer, | |
1695 | qemu_clock_get_ns(QEMU_CLOCK_HOST) + chain->n->rsc_timeout); | |
1696 | return size; | |
1697 | } | |
1698 | ||
1699 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, nseg) { | |
1700 | if (chain->proto == ETH_P_IP) { | |
1701 | ret = virtio_net_rsc_coalesce4(chain, seg, buf, size, unit); | |
1702 | } else { | |
1703 | ret = virtio_net_rsc_coalesce6(chain, seg, buf, size, unit); | |
1704 | } | |
1705 | ||
1706 | if (ret == RSC_FINAL) { | |
1707 | if (virtio_net_rsc_drain_seg(chain, seg) == 0) { | |
1708 | /* Send failed */ | |
1709 | chain->stat.final_failed++; | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | /* Send current packet */ | |
1714 | return virtio_net_do_receive(nc, buf, size); | |
1715 | } else if (ret == RSC_NO_MATCH) { | |
1716 | continue; | |
1717 | } else { | |
1718 | /* Coalesced, mark coalesced flag to tell calc cksum for ipv4 */ | |
1719 | seg->is_coalesced = 1; | |
1720 | return size; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | chain->stat.no_match_cache++; | |
1725 | virtio_net_rsc_cache_buf(chain, nc, buf, size); | |
1726 | return size; | |
1727 | } | |
1728 | ||
1729 | /* Drain a connection data, this is to avoid out of order segments */ | |
1730 | static size_t virtio_net_rsc_drain_flow(VirtioNetRscChain *chain, | |
1731 | NetClientState *nc, | |
1732 | const uint8_t *buf, size_t size, | |
1733 | uint16_t ip_start, uint16_t ip_size, | |
1734 | uint16_t tcp_port) | |
1735 | { | |
1736 | VirtioNetRscSeg *seg, *nseg; | |
1737 | uint32_t ppair1, ppair2; | |
1738 | ||
1739 | ppair1 = *(uint32_t *)(buf + tcp_port); | |
1740 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, nseg) { | |
1741 | ppair2 = *(uint32_t *)(seg->buf + tcp_port); | |
1742 | if (memcmp(buf + ip_start, seg->buf + ip_start, ip_size) | |
1743 | || (ppair1 != ppair2)) { | |
1744 | continue; | |
1745 | } | |
1746 | if (virtio_net_rsc_drain_seg(chain, seg) == 0) { | |
1747 | chain->stat.drain_failed++; | |
1748 | } | |
1749 | ||
1750 | break; | |
1751 | } | |
1752 | ||
1753 | return virtio_net_do_receive(nc, buf, size); | |
1754 | } | |
1755 | ||
1756 | static int32_t virtio_net_rsc_sanity_check4(VirtioNetRscChain *chain, | |
1757 | struct ip_header *ip, | |
1758 | const uint8_t *buf, size_t size) | |
1759 | { | |
1760 | uint16_t ip_len; | |
1761 | ||
1762 | /* Not an ipv4 packet */ | |
1763 | if (((ip->ip_ver_len & 0xF0) >> 4) != IP_HEADER_VERSION_4) { | |
1764 | chain->stat.ip_option++; | |
1765 | return RSC_BYPASS; | |
1766 | } | |
1767 | ||
1768 | /* Don't handle packets with ip option */ | |
1769 | if ((ip->ip_ver_len & 0xF) != VIRTIO_NET_IP4_HEADER_LENGTH) { | |
1770 | chain->stat.ip_option++; | |
1771 | return RSC_BYPASS; | |
1772 | } | |
1773 | ||
1774 | if (ip->ip_p != IPPROTO_TCP) { | |
1775 | chain->stat.bypass_not_tcp++; | |
1776 | return RSC_BYPASS; | |
1777 | } | |
1778 | ||
1779 | /* Don't handle packets with ip fragment */ | |
1780 | if (!(htons(ip->ip_off) & IP_DF)) { | |
1781 | chain->stat.ip_frag++; | |
1782 | return RSC_BYPASS; | |
1783 | } | |
1784 | ||
1785 | /* Don't handle packets with ecn flag */ | |
1786 | if (IPTOS_ECN(ip->ip_tos)) { | |
1787 | chain->stat.ip_ecn++; | |
1788 | return RSC_BYPASS; | |
1789 | } | |
1790 | ||
1791 | ip_len = htons(ip->ip_len); | |
1792 | if (ip_len < (sizeof(struct ip_header) + sizeof(struct tcp_header)) | |
1793 | || ip_len > (size - chain->n->guest_hdr_len - | |
1794 | sizeof(struct eth_header))) { | |
1795 | chain->stat.ip_hacked++; | |
1796 | return RSC_BYPASS; | |
1797 | } | |
1798 | ||
1799 | return RSC_CANDIDATE; | |
1800 | } | |
1801 | ||
1802 | static size_t virtio_net_rsc_receive4(VirtioNetRscChain *chain, | |
1803 | NetClientState *nc, | |
1804 | const uint8_t *buf, size_t size) | |
1805 | { | |
1806 | int32_t ret; | |
1807 | uint16_t hdr_len; | |
1808 | VirtioNetRscUnit unit; | |
1809 | ||
1810 | hdr_len = ((VirtIONet *)(chain->n))->guest_hdr_len; | |
1811 | ||
1812 | if (size < (hdr_len + sizeof(struct eth_header) + sizeof(struct ip_header) | |
1813 | + sizeof(struct tcp_header))) { | |
1814 | chain->stat.bypass_not_tcp++; | |
1815 | return virtio_net_do_receive(nc, buf, size); | |
1816 | } | |
1817 | ||
1818 | virtio_net_rsc_extract_unit4(chain, buf, &unit); | |
1819 | if (virtio_net_rsc_sanity_check4(chain, unit.ip, buf, size) | |
1820 | != RSC_CANDIDATE) { | |
1821 | return virtio_net_do_receive(nc, buf, size); | |
1822 | } | |
1823 | ||
1824 | ret = virtio_net_rsc_tcp_ctrl_check(chain, unit.tcp); | |
1825 | if (ret == RSC_BYPASS) { | |
1826 | return virtio_net_do_receive(nc, buf, size); | |
1827 | } else if (ret == RSC_FINAL) { | |
1828 | return virtio_net_rsc_drain_flow(chain, nc, buf, size, | |
1829 | ((hdr_len + sizeof(struct eth_header)) + 12), | |
1830 | VIRTIO_NET_IP4_ADDR_SIZE, | |
1831 | hdr_len + sizeof(struct eth_header) + sizeof(struct ip_header)); | |
1832 | } | |
1833 | ||
1834 | return virtio_net_rsc_do_coalesce(chain, nc, buf, size, &unit); | |
1835 | } | |
1836 | ||
1837 | static int32_t virtio_net_rsc_sanity_check6(VirtioNetRscChain *chain, | |
1838 | struct ip6_header *ip6, | |
1839 | const uint8_t *buf, size_t size) | |
1840 | { | |
1841 | uint16_t ip_len; | |
1842 | ||
1843 | if (((ip6->ip6_ctlun.ip6_un1.ip6_un1_flow & 0xF0) >> 4) | |
1844 | != IP_HEADER_VERSION_6) { | |
1845 | return RSC_BYPASS; | |
1846 | } | |
1847 | ||
1848 | /* Both option and protocol is checked in this */ | |
1849 | if (ip6->ip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_TCP) { | |
1850 | chain->stat.bypass_not_tcp++; | |
1851 | return RSC_BYPASS; | |
1852 | } | |
1853 | ||
1854 | ip_len = htons(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen); | |
1855 | if (ip_len < sizeof(struct tcp_header) || | |
1856 | ip_len > (size - chain->n->guest_hdr_len - sizeof(struct eth_header) | |
1857 | - sizeof(struct ip6_header))) { | |
1858 | chain->stat.ip_hacked++; | |
1859 | return RSC_BYPASS; | |
1860 | } | |
1861 | ||
1862 | /* Don't handle packets with ecn flag */ | |
1863 | if (IP6_ECN(ip6->ip6_ctlun.ip6_un3.ip6_un3_ecn)) { | |
1864 | chain->stat.ip_ecn++; | |
1865 | return RSC_BYPASS; | |
1866 | } | |
1867 | ||
1868 | return RSC_CANDIDATE; | |
1869 | } | |
1870 | ||
1871 | static size_t virtio_net_rsc_receive6(void *opq, NetClientState *nc, | |
1872 | const uint8_t *buf, size_t size) | |
1873 | { | |
1874 | int32_t ret; | |
1875 | uint16_t hdr_len; | |
1876 | VirtioNetRscChain *chain; | |
1877 | VirtioNetRscUnit unit; | |
1878 | ||
1879 | chain = (VirtioNetRscChain *)opq; | |
1880 | hdr_len = ((VirtIONet *)(chain->n))->guest_hdr_len; | |
1881 | ||
1882 | if (size < (hdr_len + sizeof(struct eth_header) + sizeof(struct ip6_header) | |
1883 | + sizeof(tcp_header))) { | |
1884 | return virtio_net_do_receive(nc, buf, size); | |
1885 | } | |
1886 | ||
1887 | virtio_net_rsc_extract_unit6(chain, buf, &unit); | |
1888 | if (RSC_CANDIDATE != virtio_net_rsc_sanity_check6(chain, | |
1889 | unit.ip, buf, size)) { | |
1890 | return virtio_net_do_receive(nc, buf, size); | |
1891 | } | |
1892 | ||
1893 | ret = virtio_net_rsc_tcp_ctrl_check(chain, unit.tcp); | |
1894 | if (ret == RSC_BYPASS) { | |
1895 | return virtio_net_do_receive(nc, buf, size); | |
1896 | } else if (ret == RSC_FINAL) { | |
1897 | return virtio_net_rsc_drain_flow(chain, nc, buf, size, | |
1898 | ((hdr_len + sizeof(struct eth_header)) + 8), | |
1899 | VIRTIO_NET_IP6_ADDR_SIZE, | |
1900 | hdr_len + sizeof(struct eth_header) | |
1901 | + sizeof(struct ip6_header)); | |
1902 | } | |
1903 | ||
1904 | return virtio_net_rsc_do_coalesce(chain, nc, buf, size, &unit); | |
1905 | } | |
1906 | ||
1907 | static VirtioNetRscChain *virtio_net_rsc_lookup_chain(VirtIONet *n, | |
1908 | NetClientState *nc, | |
1909 | uint16_t proto) | |
1910 | { | |
1911 | VirtioNetRscChain *chain; | |
1912 | ||
1913 | if ((proto != (uint16_t)ETH_P_IP) && (proto != (uint16_t)ETH_P_IPV6)) { | |
1914 | return NULL; | |
1915 | } | |
1916 | ||
1917 | QTAILQ_FOREACH(chain, &n->rsc_chains, next) { | |
1918 | if (chain->proto == proto) { | |
1919 | return chain; | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | chain = g_malloc(sizeof(*chain)); | |
1924 | chain->n = n; | |
1925 | chain->proto = proto; | |
1926 | if (proto == (uint16_t)ETH_P_IP) { | |
1927 | chain->max_payload = VIRTIO_NET_MAX_IP4_PAYLOAD; | |
1928 | chain->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; | |
1929 | } else { | |
1930 | chain->max_payload = VIRTIO_NET_MAX_IP6_PAYLOAD; | |
1931 | chain->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; | |
1932 | } | |
1933 | chain->drain_timer = timer_new_ns(QEMU_CLOCK_HOST, | |
1934 | virtio_net_rsc_purge, chain); | |
1935 | memset(&chain->stat, 0, sizeof(chain->stat)); | |
1936 | ||
1937 | QTAILQ_INIT(&chain->buffers); | |
1938 | QTAILQ_INSERT_TAIL(&n->rsc_chains, chain, next); | |
1939 | ||
1940 | return chain; | |
1941 | } | |
1942 | ||
1943 | static ssize_t virtio_net_rsc_receive(NetClientState *nc, | |
1944 | const uint8_t *buf, | |
1945 | size_t size) | |
1946 | { | |
1947 | uint16_t proto; | |
1948 | VirtioNetRscChain *chain; | |
1949 | struct eth_header *eth; | |
1950 | VirtIONet *n; | |
1951 | ||
1952 | n = qemu_get_nic_opaque(nc); | |
1953 | if (size < (n->host_hdr_len + sizeof(struct eth_header))) { | |
1954 | return virtio_net_do_receive(nc, buf, size); | |
1955 | } | |
1956 | ||
1957 | eth = (struct eth_header *)(buf + n->guest_hdr_len); | |
1958 | proto = htons(eth->h_proto); | |
1959 | ||
1960 | chain = virtio_net_rsc_lookup_chain(n, nc, proto); | |
1961 | if (chain) { | |
1962 | chain->stat.received++; | |
1963 | if (proto == (uint16_t)ETH_P_IP && n->rsc4_enabled) { | |
1964 | return virtio_net_rsc_receive4(chain, nc, buf, size); | |
1965 | } else if (proto == (uint16_t)ETH_P_IPV6 && n->rsc6_enabled) { | |
1966 | return virtio_net_rsc_receive6(chain, nc, buf, size); | |
1967 | } | |
1968 | } | |
1969 | return virtio_net_do_receive(nc, buf, size); | |
1970 | } | |
1971 | ||
1972 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, | |
1973 | size_t size) | |
1974 | { | |
1975 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
1976 | if ((n->rsc4_enabled || n->rsc6_enabled)) { | |
1977 | return virtio_net_rsc_receive(nc, buf, size); | |
1978 | } else { | |
1979 | return virtio_net_do_receive(nc, buf, size); | |
1980 | } | |
1981 | } | |
1982 | ||
0c87e93e | 1983 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q); |
6243375f | 1984 | |
4e68f7a0 | 1985 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 1986 | { |
cc1f0f45 | 1987 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1988 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1989 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
6243375f | 1990 | |
51b19ebe | 1991 | virtqueue_push(q->tx_vq, q->async_tx.elem, 0); |
17a0ca55 | 1992 | virtio_notify(vdev, q->tx_vq); |
6243375f | 1993 | |
51b19ebe PB |
1994 | g_free(q->async_tx.elem); |
1995 | q->async_tx.elem = NULL; | |
6243375f | 1996 | |
0c87e93e JW |
1997 | virtio_queue_set_notification(q->tx_vq, 1); |
1998 | virtio_net_flush_tx(q); | |
6243375f MM |
1999 | } |
2000 | ||
fbe78f4f | 2001 | /* TX */ |
0c87e93e | 2002 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q) |
fbe78f4f | 2003 | { |
0c87e93e | 2004 | VirtIONet *n = q->n; |
17a0ca55 | 2005 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
51b19ebe | 2006 | VirtQueueElement *elem; |
e3f30488 | 2007 | int32_t num_packets = 0; |
fed699f9 | 2008 | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); |
17a0ca55 | 2009 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
e3f30488 AW |
2010 | return num_packets; |
2011 | } | |
fbe78f4f | 2012 | |
51b19ebe | 2013 | if (q->async_tx.elem) { |
0c87e93e | 2014 | virtio_queue_set_notification(q->tx_vq, 0); |
e3f30488 | 2015 | return num_packets; |
6243375f MM |
2016 | } |
2017 | ||
51b19ebe | 2018 | for (;;) { |
bd89dd98 | 2019 | ssize_t ret; |
51b19ebe PB |
2020 | unsigned int out_num; |
2021 | struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg; | |
feb93f36 | 2022 | struct virtio_net_hdr_mrg_rxbuf mhdr; |
fbe78f4f | 2023 | |
51b19ebe PB |
2024 | elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement)); |
2025 | if (!elem) { | |
2026 | break; | |
2027 | } | |
2028 | ||
2029 | out_num = elem->out_num; | |
2030 | out_sg = elem->out_sg; | |
7b80d08e | 2031 | if (out_num < 1) { |
fa5e56c2 GK |
2032 | virtio_error(vdev, "virtio-net header not in first element"); |
2033 | virtqueue_detach_element(q->tx_vq, elem, 0); | |
2034 | g_free(elem); | |
2035 | return -EINVAL; | |
fbe78f4f AL |
2036 | } |
2037 | ||
032a74a1 | 2038 | if (n->has_vnet_hdr) { |
feb93f36 JW |
2039 | if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < |
2040 | n->guest_hdr_len) { | |
fa5e56c2 GK |
2041 | virtio_error(vdev, "virtio-net header incorrect"); |
2042 | virtqueue_detach_element(q->tx_vq, elem, 0); | |
2043 | g_free(elem); | |
2044 | return -EINVAL; | |
032a74a1 | 2045 | } |
1bfa316c | 2046 | if (n->needs_vnet_hdr_swap) { |
feb93f36 JW |
2047 | virtio_net_hdr_swap(vdev, (void *) &mhdr); |
2048 | sg2[0].iov_base = &mhdr; | |
2049 | sg2[0].iov_len = n->guest_hdr_len; | |
2050 | out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, | |
2051 | out_sg, out_num, | |
2052 | n->guest_hdr_len, -1); | |
2053 | if (out_num == VIRTQUEUE_MAX_SIZE) { | |
2054 | goto drop; | |
7d37435b | 2055 | } |
feb93f36 JW |
2056 | out_num += 1; |
2057 | out_sg = sg2; | |
7d37435b | 2058 | } |
032a74a1 | 2059 | } |
14761f9c MT |
2060 | /* |
2061 | * If host wants to see the guest header as is, we can | |
2062 | * pass it on unchanged. Otherwise, copy just the parts | |
2063 | * that host is interested in. | |
2064 | */ | |
2065 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
2066 | if (n->host_hdr_len != n->guest_hdr_len) { | |
2067 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
2068 | out_sg, out_num, | |
2069 | 0, n->host_hdr_len); | |
2070 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
2071 | out_sg, out_num, | |
2072 | n->guest_hdr_len, -1); | |
2073 | out_num = sg_num; | |
2074 | out_sg = sg; | |
fbe78f4f AL |
2075 | } |
2076 | ||
fed699f9 JW |
2077 | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
2078 | out_sg, out_num, virtio_net_tx_complete); | |
6243375f | 2079 | if (ret == 0) { |
0c87e93e JW |
2080 | virtio_queue_set_notification(q->tx_vq, 0); |
2081 | q->async_tx.elem = elem; | |
e3f30488 | 2082 | return -EBUSY; |
6243375f MM |
2083 | } |
2084 | ||
feb93f36 | 2085 | drop: |
51b19ebe | 2086 | virtqueue_push(q->tx_vq, elem, 0); |
17a0ca55 | 2087 | virtio_notify(vdev, q->tx_vq); |
51b19ebe | 2088 | g_free(elem); |
e3f30488 AW |
2089 | |
2090 | if (++num_packets >= n->tx_burst) { | |
2091 | break; | |
2092 | } | |
fbe78f4f | 2093 | } |
e3f30488 | 2094 | return num_packets; |
fbe78f4f AL |
2095 | } |
2096 | ||
a697a334 | 2097 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f | 2098 | { |
17a0ca55 | 2099 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2100 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
fbe78f4f | 2101 | |
283e2c2a YB |
2102 | if (unlikely((n->status & VIRTIO_NET_S_LINK_UP) == 0)) { |
2103 | virtio_net_drop_tx_queue_data(vdev, vq); | |
2104 | return; | |
2105 | } | |
2106 | ||
783e7706 | 2107 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 2108 | if (!vdev->vm_running) { |
0c87e93e | 2109 | q->tx_waiting = 1; |
783e7706 MT |
2110 | return; |
2111 | } | |
2112 | ||
0c87e93e | 2113 | if (q->tx_waiting) { |
fbe78f4f | 2114 | virtio_queue_set_notification(vq, 1); |
bc72ad67 | 2115 | timer_del(q->tx_timer); |
0c87e93e | 2116 | q->tx_waiting = 0; |
fa5e56c2 GK |
2117 | if (virtio_net_flush_tx(q) == -EINVAL) { |
2118 | return; | |
2119 | } | |
fbe78f4f | 2120 | } else { |
bc72ad67 AB |
2121 | timer_mod(q->tx_timer, |
2122 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
0c87e93e | 2123 | q->tx_waiting = 1; |
fbe78f4f AL |
2124 | virtio_queue_set_notification(vq, 0); |
2125 | } | |
2126 | } | |
2127 | ||
a697a334 AW |
2128 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
2129 | { | |
17a0ca55 | 2130 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2131 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
a697a334 | 2132 | |
283e2c2a YB |
2133 | if (unlikely((n->status & VIRTIO_NET_S_LINK_UP) == 0)) { |
2134 | virtio_net_drop_tx_queue_data(vdev, vq); | |
2135 | return; | |
2136 | } | |
2137 | ||
0c87e93e | 2138 | if (unlikely(q->tx_waiting)) { |
a697a334 AW |
2139 | return; |
2140 | } | |
0c87e93e | 2141 | q->tx_waiting = 1; |
783e7706 | 2142 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 2143 | if (!vdev->vm_running) { |
783e7706 MT |
2144 | return; |
2145 | } | |
a697a334 | 2146 | virtio_queue_set_notification(vq, 0); |
0c87e93e | 2147 | qemu_bh_schedule(q->tx_bh); |
a697a334 AW |
2148 | } |
2149 | ||
fbe78f4f AL |
2150 | static void virtio_net_tx_timer(void *opaque) |
2151 | { | |
0c87e93e JW |
2152 | VirtIONetQueue *q = opaque; |
2153 | VirtIONet *n = q->n; | |
17a0ca55 | 2154 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
e8bcf842 MT |
2155 | /* This happens when device was stopped but BH wasn't. */ |
2156 | if (!vdev->vm_running) { | |
2157 | /* Make sure tx waiting is set, so we'll run when restarted. */ | |
2158 | assert(q->tx_waiting); | |
2159 | return; | |
2160 | } | |
fbe78f4f | 2161 | |
0c87e93e | 2162 | q->tx_waiting = 0; |
fbe78f4f AL |
2163 | |
2164 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 2165 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 2166 | return; |
17a0ca55 | 2167 | } |
fbe78f4f | 2168 | |
0c87e93e JW |
2169 | virtio_queue_set_notification(q->tx_vq, 1); |
2170 | virtio_net_flush_tx(q); | |
fbe78f4f AL |
2171 | } |
2172 | ||
a697a334 AW |
2173 | static void virtio_net_tx_bh(void *opaque) |
2174 | { | |
0c87e93e JW |
2175 | VirtIONetQueue *q = opaque; |
2176 | VirtIONet *n = q->n; | |
17a0ca55 | 2177 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
a697a334 AW |
2178 | int32_t ret; |
2179 | ||
e8bcf842 MT |
2180 | /* This happens when device was stopped but BH wasn't. */ |
2181 | if (!vdev->vm_running) { | |
2182 | /* Make sure tx waiting is set, so we'll run when restarted. */ | |
2183 | assert(q->tx_waiting); | |
2184 | return; | |
2185 | } | |
783e7706 | 2186 | |
0c87e93e | 2187 | q->tx_waiting = 0; |
a697a334 AW |
2188 | |
2189 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 2190 | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { |
a697a334 | 2191 | return; |
17a0ca55 | 2192 | } |
a697a334 | 2193 | |
0c87e93e | 2194 | ret = virtio_net_flush_tx(q); |
fa5e56c2 GK |
2195 | if (ret == -EBUSY || ret == -EINVAL) { |
2196 | return; /* Notification re-enable handled by tx_complete or device | |
2197 | * broken */ | |
a697a334 AW |
2198 | } |
2199 | ||
2200 | /* If we flush a full burst of packets, assume there are | |
2201 | * more coming and immediately reschedule */ | |
2202 | if (ret >= n->tx_burst) { | |
0c87e93e JW |
2203 | qemu_bh_schedule(q->tx_bh); |
2204 | q->tx_waiting = 1; | |
a697a334 AW |
2205 | return; |
2206 | } | |
2207 | ||
2208 | /* If less than a full burst, re-enable notification and flush | |
2209 | * anything that may have come in while we weren't looking. If | |
2210 | * we find something, assume the guest is still active and reschedule */ | |
0c87e93e | 2211 | virtio_queue_set_notification(q->tx_vq, 1); |
fa5e56c2 GK |
2212 | ret = virtio_net_flush_tx(q); |
2213 | if (ret == -EINVAL) { | |
2214 | return; | |
2215 | } else if (ret > 0) { | |
0c87e93e JW |
2216 | virtio_queue_set_notification(q->tx_vq, 0); |
2217 | qemu_bh_schedule(q->tx_bh); | |
2218 | q->tx_waiting = 1; | |
a697a334 AW |
2219 | } |
2220 | } | |
2221 | ||
f9d6dbf0 WC |
2222 | static void virtio_net_add_queue(VirtIONet *n, int index) |
2223 | { | |
2224 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
2225 | ||
1c0fbfa3 MT |
2226 | n->vqs[index].rx_vq = virtio_add_queue(vdev, n->net_conf.rx_queue_size, |
2227 | virtio_net_handle_rx); | |
9b02e161 | 2228 | |
f9d6dbf0 WC |
2229 | if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { |
2230 | n->vqs[index].tx_vq = | |
9b02e161 WW |
2231 | virtio_add_queue(vdev, n->net_conf.tx_queue_size, |
2232 | virtio_net_handle_tx_timer); | |
f9d6dbf0 WC |
2233 | n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
2234 | virtio_net_tx_timer, | |
2235 | &n->vqs[index]); | |
2236 | } else { | |
2237 | n->vqs[index].tx_vq = | |
9b02e161 WW |
2238 | virtio_add_queue(vdev, n->net_conf.tx_queue_size, |
2239 | virtio_net_handle_tx_bh); | |
f9d6dbf0 WC |
2240 | n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); |
2241 | } | |
2242 | ||
2243 | n->vqs[index].tx_waiting = 0; | |
2244 | n->vqs[index].n = n; | |
2245 | } | |
2246 | ||
2247 | static void virtio_net_del_queue(VirtIONet *n, int index) | |
2248 | { | |
2249 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
2250 | VirtIONetQueue *q = &n->vqs[index]; | |
2251 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
2252 | ||
2253 | qemu_purge_queued_packets(nc); | |
2254 | ||
2255 | virtio_del_queue(vdev, index * 2); | |
2256 | if (q->tx_timer) { | |
2257 | timer_del(q->tx_timer); | |
2258 | timer_free(q->tx_timer); | |
f989c30c | 2259 | q->tx_timer = NULL; |
f9d6dbf0 WC |
2260 | } else { |
2261 | qemu_bh_delete(q->tx_bh); | |
f989c30c | 2262 | q->tx_bh = NULL; |
f9d6dbf0 | 2263 | } |
f989c30c | 2264 | q->tx_waiting = 0; |
f9d6dbf0 WC |
2265 | virtio_del_queue(vdev, index * 2 + 1); |
2266 | } | |
2267 | ||
2268 | static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) | |
2269 | { | |
2270 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
2271 | int old_num_queues = virtio_get_num_queues(vdev); | |
2272 | int new_num_queues = new_max_queues * 2 + 1; | |
2273 | int i; | |
2274 | ||
2275 | assert(old_num_queues >= 3); | |
2276 | assert(old_num_queues % 2 == 1); | |
2277 | ||
2278 | if (old_num_queues == new_num_queues) { | |
2279 | return; | |
2280 | } | |
2281 | ||
2282 | /* | |
2283 | * We always need to remove and add ctrl vq if | |
2284 | * old_num_queues != new_num_queues. Remove ctrl_vq first, | |
20f86a75 | 2285 | * and then we only enter one of the following two loops. |
f9d6dbf0 WC |
2286 | */ |
2287 | virtio_del_queue(vdev, old_num_queues - 1); | |
2288 | ||
2289 | for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { | |
2290 | /* new_num_queues < old_num_queues */ | |
2291 | virtio_net_del_queue(n, i / 2); | |
2292 | } | |
2293 | ||
2294 | for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { | |
2295 | /* new_num_queues > old_num_queues */ | |
2296 | virtio_net_add_queue(n, i / 2); | |
2297 | } | |
2298 | ||
2299 | /* add ctrl_vq last */ | |
2300 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); | |
2301 | } | |
2302 | ||
ec57db16 | 2303 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) |
fed699f9 | 2304 | { |
f9d6dbf0 WC |
2305 | int max = multiqueue ? n->max_queues : 1; |
2306 | ||
fed699f9 | 2307 | n->multiqueue = multiqueue; |
f9d6dbf0 | 2308 | virtio_net_change_num_queues(n, max); |
fed699f9 | 2309 | |
fed699f9 JW |
2310 | virtio_net_set_queues(n); |
2311 | } | |
2312 | ||
982b78c5 | 2313 | static int virtio_net_post_load_device(void *opaque, int version_id) |
037dab2f | 2314 | { |
982b78c5 DDAG |
2315 | VirtIONet *n = opaque; |
2316 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
037dab2f | 2317 | int i, link_down; |
fbe78f4f | 2318 | |
9d8c6a25 | 2319 | trace_virtio_net_post_load_device(); |
982b78c5 | 2320 | virtio_net_set_mrg_rx_bufs(n, n->mergeable_rx_bufs, |
95129d6f CH |
2321 | virtio_vdev_has_feature(vdev, |
2322 | VIRTIO_F_VERSION_1)); | |
fbe78f4f | 2323 | |
76010cb3 | 2324 | /* MAC_TABLE_ENTRIES may be different from the saved image */ |
982b78c5 | 2325 | if (n->mac_table.in_use > MAC_TABLE_ENTRIES) { |
76010cb3 | 2326 | n->mac_table.in_use = 0; |
b6503ed9 | 2327 | } |
0ce0e8f4 | 2328 | |
982b78c5 | 2329 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { |
6c666823 MT |
2330 | n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); |
2331 | } | |
2332 | ||
2333 | if (peer_has_vnet_hdr(n)) { | |
2334 | virtio_net_apply_guest_offloads(n); | |
2335 | } | |
2336 | ||
5f800801 JW |
2337 | virtio_net_set_queues(n); |
2338 | ||
2d9aba39 AW |
2339 | /* Find the first multicast entry in the saved MAC filter */ |
2340 | for (i = 0; i < n->mac_table.in_use; i++) { | |
2341 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
2342 | break; | |
2343 | } | |
2344 | } | |
2345 | n->mac_table.first_multi = i; | |
98991481 AK |
2346 | |
2347 | /* nc.link_down can't be migrated, so infer link_down according | |
2348 | * to link status bit in n->status */ | |
5f800801 JW |
2349 | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; |
2350 | for (i = 0; i < n->max_queues; i++) { | |
2351 | qemu_get_subqueue(n->nic, i)->link_down = link_down; | |
2352 | } | |
98991481 | 2353 | |
6c666823 MT |
2354 | if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && |
2355 | virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { | |
9d8c6a25 DDAG |
2356 | qemu_announce_timer_reset(&n->announce_timer, migrate_announce_params(), |
2357 | QEMU_CLOCK_VIRTUAL, | |
2358 | virtio_net_announce_timer, n); | |
2359 | if (n->announce_timer.round) { | |
2360 | timer_mod(n->announce_timer.tm, | |
2361 | qemu_clock_get_ms(n->announce_timer.type)); | |
2362 | } else { | |
2363 | qemu_announce_timer_del(&n->announce_timer); | |
2364 | } | |
6c666823 MT |
2365 | } |
2366 | ||
fbe78f4f AL |
2367 | return 0; |
2368 | } | |
2369 | ||
982b78c5 DDAG |
2370 | /* tx_waiting field of a VirtIONetQueue */ |
2371 | static const VMStateDescription vmstate_virtio_net_queue_tx_waiting = { | |
2372 | .name = "virtio-net-queue-tx_waiting", | |
2373 | .fields = (VMStateField[]) { | |
2374 | VMSTATE_UINT32(tx_waiting, VirtIONetQueue), | |
2375 | VMSTATE_END_OF_LIST() | |
2376 | }, | |
2377 | }; | |
2378 | ||
2379 | static bool max_queues_gt_1(void *opaque, int version_id) | |
2380 | { | |
2381 | return VIRTIO_NET(opaque)->max_queues > 1; | |
2382 | } | |
2383 | ||
2384 | static bool has_ctrl_guest_offloads(void *opaque, int version_id) | |
2385 | { | |
2386 | return virtio_vdev_has_feature(VIRTIO_DEVICE(opaque), | |
2387 | VIRTIO_NET_F_CTRL_GUEST_OFFLOADS); | |
2388 | } | |
2389 | ||
2390 | static bool mac_table_fits(void *opaque, int version_id) | |
2391 | { | |
2392 | return VIRTIO_NET(opaque)->mac_table.in_use <= MAC_TABLE_ENTRIES; | |
2393 | } | |
2394 | ||
2395 | static bool mac_table_doesnt_fit(void *opaque, int version_id) | |
2396 | { | |
2397 | return !mac_table_fits(opaque, version_id); | |
2398 | } | |
2399 | ||
2400 | /* This temporary type is shared by all the WITH_TMP methods | |
2401 | * although only some fields are used by each. | |
2402 | */ | |
2403 | struct VirtIONetMigTmp { | |
2404 | VirtIONet *parent; | |
2405 | VirtIONetQueue *vqs_1; | |
2406 | uint16_t curr_queues_1; | |
2407 | uint8_t has_ufo; | |
2408 | uint32_t has_vnet_hdr; | |
2409 | }; | |
2410 | ||
2411 | /* The 2nd and subsequent tx_waiting flags are loaded later than | |
2412 | * the 1st entry in the queues and only if there's more than one | |
2413 | * entry. We use the tmp mechanism to calculate a temporary | |
2414 | * pointer and count and also validate the count. | |
2415 | */ | |
2416 | ||
44b1ff31 | 2417 | static int virtio_net_tx_waiting_pre_save(void *opaque) |
982b78c5 DDAG |
2418 | { |
2419 | struct VirtIONetMigTmp *tmp = opaque; | |
2420 | ||
2421 | tmp->vqs_1 = tmp->parent->vqs + 1; | |
2422 | tmp->curr_queues_1 = tmp->parent->curr_queues - 1; | |
2423 | if (tmp->parent->curr_queues == 0) { | |
2424 | tmp->curr_queues_1 = 0; | |
2425 | } | |
44b1ff31 DDAG |
2426 | |
2427 | return 0; | |
982b78c5 DDAG |
2428 | } |
2429 | ||
2430 | static int virtio_net_tx_waiting_pre_load(void *opaque) | |
2431 | { | |
2432 | struct VirtIONetMigTmp *tmp = opaque; | |
2433 | ||
2434 | /* Reuse the pointer setup from save */ | |
2435 | virtio_net_tx_waiting_pre_save(opaque); | |
2436 | ||
2437 | if (tmp->parent->curr_queues > tmp->parent->max_queues) { | |
2438 | error_report("virtio-net: curr_queues %x > max_queues %x", | |
2439 | tmp->parent->curr_queues, tmp->parent->max_queues); | |
2440 | ||
2441 | return -EINVAL; | |
2442 | } | |
2443 | ||
2444 | return 0; /* all good */ | |
2445 | } | |
2446 | ||
2447 | static const VMStateDescription vmstate_virtio_net_tx_waiting = { | |
2448 | .name = "virtio-net-tx_waiting", | |
2449 | .pre_load = virtio_net_tx_waiting_pre_load, | |
2450 | .pre_save = virtio_net_tx_waiting_pre_save, | |
2451 | .fields = (VMStateField[]) { | |
2452 | VMSTATE_STRUCT_VARRAY_POINTER_UINT16(vqs_1, struct VirtIONetMigTmp, | |
2453 | curr_queues_1, | |
2454 | vmstate_virtio_net_queue_tx_waiting, | |
2455 | struct VirtIONetQueue), | |
2456 | VMSTATE_END_OF_LIST() | |
2457 | }, | |
2458 | }; | |
2459 | ||
2460 | /* the 'has_ufo' flag is just tested; if the incoming stream has the | |
2461 | * flag set we need to check that we have it | |
2462 | */ | |
2463 | static int virtio_net_ufo_post_load(void *opaque, int version_id) | |
2464 | { | |
2465 | struct VirtIONetMigTmp *tmp = opaque; | |
2466 | ||
2467 | if (tmp->has_ufo && !peer_has_ufo(tmp->parent)) { | |
2468 | error_report("virtio-net: saved image requires TUN_F_UFO support"); | |
2469 | return -EINVAL; | |
2470 | } | |
2471 | ||
2472 | return 0; | |
2473 | } | |
2474 | ||
44b1ff31 | 2475 | static int virtio_net_ufo_pre_save(void *opaque) |
982b78c5 DDAG |
2476 | { |
2477 | struct VirtIONetMigTmp *tmp = opaque; | |
2478 | ||
2479 | tmp->has_ufo = tmp->parent->has_ufo; | |
44b1ff31 DDAG |
2480 | |
2481 | return 0; | |
982b78c5 DDAG |
2482 | } |
2483 | ||
2484 | static const VMStateDescription vmstate_virtio_net_has_ufo = { | |
2485 | .name = "virtio-net-ufo", | |
2486 | .post_load = virtio_net_ufo_post_load, | |
2487 | .pre_save = virtio_net_ufo_pre_save, | |
2488 | .fields = (VMStateField[]) { | |
2489 | VMSTATE_UINT8(has_ufo, struct VirtIONetMigTmp), | |
2490 | VMSTATE_END_OF_LIST() | |
2491 | }, | |
2492 | }; | |
2493 | ||
2494 | /* the 'has_vnet_hdr' flag is just tested; if the incoming stream has the | |
2495 | * flag set we need to check that we have it | |
2496 | */ | |
2497 | static int virtio_net_vnet_post_load(void *opaque, int version_id) | |
2498 | { | |
2499 | struct VirtIONetMigTmp *tmp = opaque; | |
2500 | ||
2501 | if (tmp->has_vnet_hdr && !peer_has_vnet_hdr(tmp->parent)) { | |
2502 | error_report("virtio-net: saved image requires vnet_hdr=on"); | |
2503 | return -EINVAL; | |
2504 | } | |
2505 | ||
2506 | return 0; | |
2507 | } | |
2508 | ||
44b1ff31 | 2509 | static int virtio_net_vnet_pre_save(void *opaque) |
982b78c5 DDAG |
2510 | { |
2511 | struct VirtIONetMigTmp *tmp = opaque; | |
2512 | ||
2513 | tmp->has_vnet_hdr = tmp->parent->has_vnet_hdr; | |
44b1ff31 DDAG |
2514 | |
2515 | return 0; | |
982b78c5 DDAG |
2516 | } |
2517 | ||
2518 | static const VMStateDescription vmstate_virtio_net_has_vnet = { | |
2519 | .name = "virtio-net-vnet", | |
2520 | .post_load = virtio_net_vnet_post_load, | |
2521 | .pre_save = virtio_net_vnet_pre_save, | |
2522 | .fields = (VMStateField[]) { | |
2523 | VMSTATE_UINT32(has_vnet_hdr, struct VirtIONetMigTmp), | |
2524 | VMSTATE_END_OF_LIST() | |
2525 | }, | |
2526 | }; | |
2527 | ||
2528 | static const VMStateDescription vmstate_virtio_net_device = { | |
2529 | .name = "virtio-net-device", | |
2530 | .version_id = VIRTIO_NET_VM_VERSION, | |
2531 | .minimum_version_id = VIRTIO_NET_VM_VERSION, | |
2532 | .post_load = virtio_net_post_load_device, | |
2533 | .fields = (VMStateField[]) { | |
2534 | VMSTATE_UINT8_ARRAY(mac, VirtIONet, ETH_ALEN), | |
2535 | VMSTATE_STRUCT_POINTER(vqs, VirtIONet, | |
2536 | vmstate_virtio_net_queue_tx_waiting, | |
2537 | VirtIONetQueue), | |
2538 | VMSTATE_UINT32(mergeable_rx_bufs, VirtIONet), | |
2539 | VMSTATE_UINT16(status, VirtIONet), | |
2540 | VMSTATE_UINT8(promisc, VirtIONet), | |
2541 | VMSTATE_UINT8(allmulti, VirtIONet), | |
2542 | VMSTATE_UINT32(mac_table.in_use, VirtIONet), | |
2543 | ||
2544 | /* Guarded pair: If it fits we load it, else we throw it away | |
2545 | * - can happen if source has a larger MAC table.; post-load | |
2546 | * sets flags in this case. | |
2547 | */ | |
2548 | VMSTATE_VBUFFER_MULTIPLY(mac_table.macs, VirtIONet, | |
2549 | 0, mac_table_fits, mac_table.in_use, | |
2550 | ETH_ALEN), | |
2551 | VMSTATE_UNUSED_VARRAY_UINT32(VirtIONet, mac_table_doesnt_fit, 0, | |
2552 | mac_table.in_use, ETH_ALEN), | |
2553 | ||
2554 | /* Note: This is an array of uint32's that's always been saved as a | |
2555 | * buffer; hold onto your endiannesses; it's actually used as a bitmap | |
2556 | * but based on the uint. | |
2557 | */ | |
2558 | VMSTATE_BUFFER_POINTER_UNSAFE(vlans, VirtIONet, 0, MAX_VLAN >> 3), | |
2559 | VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp, | |
2560 | vmstate_virtio_net_has_vnet), | |
2561 | VMSTATE_UINT8(mac_table.multi_overflow, VirtIONet), | |
2562 | VMSTATE_UINT8(mac_table.uni_overflow, VirtIONet), | |
2563 | VMSTATE_UINT8(alluni, VirtIONet), | |
2564 | VMSTATE_UINT8(nomulti, VirtIONet), | |
2565 | VMSTATE_UINT8(nouni, VirtIONet), | |
2566 | VMSTATE_UINT8(nobcast, VirtIONet), | |
2567 | VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp, | |
2568 | vmstate_virtio_net_has_ufo), | |
2569 | VMSTATE_SINGLE_TEST(max_queues, VirtIONet, max_queues_gt_1, 0, | |
2570 | vmstate_info_uint16_equal, uint16_t), | |
2571 | VMSTATE_UINT16_TEST(curr_queues, VirtIONet, max_queues_gt_1), | |
2572 | VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp, | |
2573 | vmstate_virtio_net_tx_waiting), | |
2574 | VMSTATE_UINT64_TEST(curr_guest_offloads, VirtIONet, | |
2575 | has_ctrl_guest_offloads), | |
2576 | VMSTATE_END_OF_LIST() | |
2577 | }, | |
2578 | }; | |
2579 | ||
eb6b6c12 | 2580 | static NetClientInfo net_virtio_info = { |
f394b2e2 | 2581 | .type = NET_CLIENT_DRIVER_NIC, |
eb6b6c12 MM |
2582 | .size = sizeof(NICState), |
2583 | .can_receive = virtio_net_can_receive, | |
2584 | .receive = virtio_net_receive, | |
eb6b6c12 | 2585 | .link_status_changed = virtio_net_set_link_status, |
b1be4280 | 2586 | .query_rx_filter = virtio_net_query_rxfilter, |
b2c929f0 | 2587 | .announce = virtio_net_announce, |
eb6b6c12 MM |
2588 | }; |
2589 | ||
f56a1247 MT |
2590 | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
2591 | { | |
17a0ca55 | 2592 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2593 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 2594 | assert(n->vhost_started); |
ed8b4afe | 2595 | return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); |
f56a1247 MT |
2596 | } |
2597 | ||
2598 | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, | |
2599 | bool mask) | |
2600 | { | |
17a0ca55 | 2601 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2602 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 2603 | assert(n->vhost_started); |
ed8b4afe | 2604 | vhost_net_virtqueue_mask(get_vhost_net(nc->peer), |
f56a1247 MT |
2605 | vdev, idx, mask); |
2606 | } | |
2607 | ||
019a3edb | 2608 | static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) |
fbe78f4f | 2609 | { |
0cd09c3a | 2610 | virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); |
a93e599d | 2611 | |
ba550851 SG |
2612 | n->config_size = virtio_feature_get_config_size(feature_sizes, |
2613 | host_features); | |
17ec5a86 FK |
2614 | } |
2615 | ||
8a253ec2 FK |
2616 | void virtio_net_set_netclient_name(VirtIONet *n, const char *name, |
2617 | const char *type) | |
2618 | { | |
2619 | /* | |
2620 | * The name can be NULL, the netclient name will be type.x. | |
2621 | */ | |
2622 | assert(type != NULL); | |
2623 | ||
9e288406 | 2624 | g_free(n->netclient_name); |
9e288406 | 2625 | g_free(n->netclient_type); |
80e0090a | 2626 | n->netclient_name = g_strdup(name); |
8a253ec2 FK |
2627 | n->netclient_type = g_strdup(type); |
2628 | } | |
2629 | ||
e6f746b3 | 2630 | static void virtio_net_device_realize(DeviceState *dev, Error **errp) |
17ec5a86 | 2631 | { |
e6f746b3 | 2632 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
284a32f0 | 2633 | VirtIONet *n = VIRTIO_NET(dev); |
b1be4280 | 2634 | NetClientState *nc; |
284a32f0 | 2635 | int i; |
1773d9ee | 2636 | |
a93e599d | 2637 | if (n->net_conf.mtu) { |
127833ee | 2638 | n->host_features |= (1ULL << VIRTIO_NET_F_MTU); |
a93e599d MC |
2639 | } |
2640 | ||
9473939e JB |
2641 | if (n->net_conf.duplex_str) { |
2642 | if (strncmp(n->net_conf.duplex_str, "half", 5) == 0) { | |
2643 | n->net_conf.duplex = DUPLEX_HALF; | |
2644 | } else if (strncmp(n->net_conf.duplex_str, "full", 5) == 0) { | |
2645 | n->net_conf.duplex = DUPLEX_FULL; | |
2646 | } else { | |
2647 | error_setg(errp, "'duplex' must be 'half' or 'full'"); | |
2648 | } | |
2649 | n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX); | |
2650 | } else { | |
2651 | n->net_conf.duplex = DUPLEX_UNKNOWN; | |
2652 | } | |
2653 | ||
2654 | if (n->net_conf.speed < SPEED_UNKNOWN) { | |
2655 | error_setg(errp, "'speed' must be between 0 and INT_MAX"); | |
2656 | } else if (n->net_conf.speed >= 0) { | |
2657 | n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX); | |
2658 | } | |
2659 | ||
da3e8a23 | 2660 | virtio_net_set_config_size(n, n->host_features); |
284a32f0 | 2661 | virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); |
fbe78f4f | 2662 | |
1c0fbfa3 MT |
2663 | /* |
2664 | * We set a lower limit on RX queue size to what it always was. | |
2665 | * Guests that want a smaller ring can always resize it without | |
2666 | * help from us (using virtio 1 and up). | |
2667 | */ | |
2668 | if (n->net_conf.rx_queue_size < VIRTIO_NET_RX_QUEUE_MIN_SIZE || | |
2669 | n->net_conf.rx_queue_size > VIRTQUEUE_MAX_SIZE || | |
5f997fd1 | 2670 | !is_power_of_2(n->net_conf.rx_queue_size)) { |
1c0fbfa3 MT |
2671 | error_setg(errp, "Invalid rx_queue_size (= %" PRIu16 "), " |
2672 | "must be a power of 2 between %d and %d.", | |
2673 | n->net_conf.rx_queue_size, VIRTIO_NET_RX_QUEUE_MIN_SIZE, | |
2674 | VIRTQUEUE_MAX_SIZE); | |
2675 | virtio_cleanup(vdev); | |
2676 | return; | |
2677 | } | |
2678 | ||
9b02e161 WW |
2679 | if (n->net_conf.tx_queue_size < VIRTIO_NET_TX_QUEUE_MIN_SIZE || |
2680 | n->net_conf.tx_queue_size > VIRTQUEUE_MAX_SIZE || | |
2681 | !is_power_of_2(n->net_conf.tx_queue_size)) { | |
2682 | error_setg(errp, "Invalid tx_queue_size (= %" PRIu16 "), " | |
2683 | "must be a power of 2 between %d and %d", | |
2684 | n->net_conf.tx_queue_size, VIRTIO_NET_TX_QUEUE_MIN_SIZE, | |
2685 | VIRTQUEUE_MAX_SIZE); | |
2686 | virtio_cleanup(vdev); | |
2687 | return; | |
2688 | } | |
2689 | ||
575a1c0e | 2690 | n->max_queues = MAX(n->nic_conf.peers.queues, 1); |
87b3bd1c | 2691 | if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { |
7e0e736e | 2692 | error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " |
631b22ea | 2693 | "must be a positive integer less than %d.", |
87b3bd1c | 2694 | n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); |
7e0e736e JW |
2695 | virtio_cleanup(vdev); |
2696 | return; | |
2697 | } | |
f6b26cf2 | 2698 | n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); |
fed699f9 | 2699 | n->curr_queues = 1; |
1773d9ee | 2700 | n->tx_timeout = n->net_conf.txtimer; |
a697a334 | 2701 | |
1773d9ee FK |
2702 | if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") |
2703 | && strcmp(n->net_conf.tx, "bh")) { | |
0765691e MA |
2704 | warn_report("virtio-net: " |
2705 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
2706 | n->net_conf.tx); | |
2707 | error_printf("Defaulting to \"bh\""); | |
a697a334 AW |
2708 | } |
2709 | ||
2eef278b MT |
2710 | n->net_conf.tx_queue_size = MIN(virtio_net_max_tx_queue_size(n), |
2711 | n->net_conf.tx_queue_size); | |
9b02e161 | 2712 | |
da51a335 | 2713 | for (i = 0; i < n->max_queues; i++) { |
f9d6dbf0 | 2714 | virtio_net_add_queue(n, i); |
a697a334 | 2715 | } |
da51a335 | 2716 | |
17a0ca55 | 2717 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); |
1773d9ee FK |
2718 | qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); |
2719 | memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); | |
554c97dd | 2720 | n->status = VIRTIO_NET_S_LINK_UP; |
9d8c6a25 DDAG |
2721 | qemu_announce_timer_reset(&n->announce_timer, migrate_announce_params(), |
2722 | QEMU_CLOCK_VIRTUAL, | |
2723 | virtio_net_announce_timer, n); | |
b2c929f0 | 2724 | n->announce_timer.round = 0; |
fbe78f4f | 2725 | |
8a253ec2 FK |
2726 | if (n->netclient_type) { |
2727 | /* | |
2728 | * Happen when virtio_net_set_netclient_name has been called. | |
2729 | */ | |
2730 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
2731 | n->netclient_type, n->netclient_name, n); | |
2732 | } else { | |
2733 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
284a32f0 | 2734 | object_get_typename(OBJECT(dev)), dev->id, n); |
8a253ec2 FK |
2735 | } |
2736 | ||
6e371ab8 MT |
2737 | peer_test_vnet_hdr(n); |
2738 | if (peer_has_vnet_hdr(n)) { | |
fed699f9 | 2739 | for (i = 0; i < n->max_queues; i++) { |
d6085e3a | 2740 | qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); |
fed699f9 | 2741 | } |
6e371ab8 MT |
2742 | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
2743 | } else { | |
2744 | n->host_hdr_len = 0; | |
2745 | } | |
eb6b6c12 | 2746 | |
1773d9ee | 2747 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); |
96d5e201 | 2748 | |
fed699f9 | 2749 | n->vqs[0].tx_waiting = 0; |
1773d9ee | 2750 | n->tx_burst = n->net_conf.txburst; |
bb9d17f8 | 2751 | virtio_net_set_mrg_rx_bufs(n, 0, 0); |
002437cd | 2752 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 2753 | |
7267c094 | 2754 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 2755 | |
7267c094 | 2756 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 2757 | |
b1be4280 AK |
2758 | nc = qemu_get_queue(n->nic); |
2759 | nc->rxfilter_notify_enabled = 1; | |
2760 | ||
2974e916 | 2761 | QTAILQ_INIT(&n->rsc_chains); |
284a32f0 | 2762 | n->qdev = dev; |
17ec5a86 FK |
2763 | } |
2764 | ||
306ec6c3 | 2765 | static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) |
17ec5a86 | 2766 | { |
306ec6c3 AF |
2767 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
2768 | VirtIONet *n = VIRTIO_NET(dev); | |
f9d6dbf0 | 2769 | int i, max_queues; |
17ec5a86 FK |
2770 | |
2771 | /* This will stop vhost backend if appropriate. */ | |
2772 | virtio_net_set_status(vdev, 0); | |
2773 | ||
9e288406 MA |
2774 | g_free(n->netclient_name); |
2775 | n->netclient_name = NULL; | |
2776 | g_free(n->netclient_type); | |
2777 | n->netclient_type = NULL; | |
8a253ec2 | 2778 | |
17ec5a86 FK |
2779 | g_free(n->mac_table.macs); |
2780 | g_free(n->vlans); | |
2781 | ||
f9d6dbf0 WC |
2782 | max_queues = n->multiqueue ? n->max_queues : 1; |
2783 | for (i = 0; i < max_queues; i++) { | |
2784 | virtio_net_del_queue(n, i); | |
17ec5a86 FK |
2785 | } |
2786 | ||
9d8c6a25 | 2787 | qemu_announce_timer_del(&n->announce_timer); |
17ec5a86 FK |
2788 | g_free(n->vqs); |
2789 | qemu_del_nic(n->nic); | |
2974e916 | 2790 | virtio_net_rsc_cleanup(n); |
6a1a8cc7 | 2791 | virtio_cleanup(vdev); |
17ec5a86 FK |
2792 | } |
2793 | ||
2794 | static void virtio_net_instance_init(Object *obj) | |
2795 | { | |
2796 | VirtIONet *n = VIRTIO_NET(obj); | |
2797 | ||
2798 | /* | |
2799 | * The default config_size is sizeof(struct virtio_net_config). | |
2800 | * Can be overriden with virtio_net_set_config_size. | |
2801 | */ | |
2802 | n->config_size = sizeof(struct virtio_net_config); | |
aa4197c3 GA |
2803 | device_add_bootindex_property(obj, &n->nic_conf.bootindex, |
2804 | "bootindex", "/ethernet-phy@0", | |
2805 | DEVICE(n), NULL); | |
17ec5a86 FK |
2806 | } |
2807 | ||
44b1ff31 | 2808 | static int virtio_net_pre_save(void *opaque) |
4d45dcfb HP |
2809 | { |
2810 | VirtIONet *n = opaque; | |
2811 | ||
2812 | /* At this point, backend must be stopped, otherwise | |
2813 | * it might keep writing to memory. */ | |
2814 | assert(!n->vhost_started); | |
44b1ff31 DDAG |
2815 | |
2816 | return 0; | |
4d45dcfb HP |
2817 | } |
2818 | ||
2819 | static const VMStateDescription vmstate_virtio_net = { | |
2820 | .name = "virtio-net", | |
2821 | .minimum_version_id = VIRTIO_NET_VM_VERSION, | |
2822 | .version_id = VIRTIO_NET_VM_VERSION, | |
2823 | .fields = (VMStateField[]) { | |
2824 | VMSTATE_VIRTIO_DEVICE, | |
2825 | VMSTATE_END_OF_LIST() | |
2826 | }, | |
2827 | .pre_save = virtio_net_pre_save, | |
2828 | }; | |
290c2428 | 2829 | |
17ec5a86 | 2830 | static Property virtio_net_properties[] = { |
127833ee JB |
2831 | DEFINE_PROP_BIT64("csum", VirtIONet, host_features, |
2832 | VIRTIO_NET_F_CSUM, true), | |
2833 | DEFINE_PROP_BIT64("guest_csum", VirtIONet, host_features, | |
87108bb2 | 2834 | VIRTIO_NET_F_GUEST_CSUM, true), |
127833ee JB |
2835 | DEFINE_PROP_BIT64("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), |
2836 | DEFINE_PROP_BIT64("guest_tso4", VirtIONet, host_features, | |
87108bb2 | 2837 | VIRTIO_NET_F_GUEST_TSO4, true), |
127833ee | 2838 | DEFINE_PROP_BIT64("guest_tso6", VirtIONet, host_features, |
87108bb2 | 2839 | VIRTIO_NET_F_GUEST_TSO6, true), |
127833ee | 2840 | DEFINE_PROP_BIT64("guest_ecn", VirtIONet, host_features, |
87108bb2 | 2841 | VIRTIO_NET_F_GUEST_ECN, true), |
127833ee | 2842 | DEFINE_PROP_BIT64("guest_ufo", VirtIONet, host_features, |
87108bb2 | 2843 | VIRTIO_NET_F_GUEST_UFO, true), |
127833ee | 2844 | DEFINE_PROP_BIT64("guest_announce", VirtIONet, host_features, |
87108bb2 | 2845 | VIRTIO_NET_F_GUEST_ANNOUNCE, true), |
127833ee | 2846 | DEFINE_PROP_BIT64("host_tso4", VirtIONet, host_features, |
87108bb2 | 2847 | VIRTIO_NET_F_HOST_TSO4, true), |
127833ee | 2848 | DEFINE_PROP_BIT64("host_tso6", VirtIONet, host_features, |
87108bb2 | 2849 | VIRTIO_NET_F_HOST_TSO6, true), |
127833ee | 2850 | DEFINE_PROP_BIT64("host_ecn", VirtIONet, host_features, |
87108bb2 | 2851 | VIRTIO_NET_F_HOST_ECN, true), |
127833ee | 2852 | DEFINE_PROP_BIT64("host_ufo", VirtIONet, host_features, |
87108bb2 | 2853 | VIRTIO_NET_F_HOST_UFO, true), |
127833ee | 2854 | DEFINE_PROP_BIT64("mrg_rxbuf", VirtIONet, host_features, |
87108bb2 | 2855 | VIRTIO_NET_F_MRG_RXBUF, true), |
127833ee | 2856 | DEFINE_PROP_BIT64("status", VirtIONet, host_features, |
87108bb2 | 2857 | VIRTIO_NET_F_STATUS, true), |
127833ee | 2858 | DEFINE_PROP_BIT64("ctrl_vq", VirtIONet, host_features, |
87108bb2 | 2859 | VIRTIO_NET_F_CTRL_VQ, true), |
127833ee | 2860 | DEFINE_PROP_BIT64("ctrl_rx", VirtIONet, host_features, |
87108bb2 | 2861 | VIRTIO_NET_F_CTRL_RX, true), |
127833ee | 2862 | DEFINE_PROP_BIT64("ctrl_vlan", VirtIONet, host_features, |
87108bb2 | 2863 | VIRTIO_NET_F_CTRL_VLAN, true), |
127833ee | 2864 | DEFINE_PROP_BIT64("ctrl_rx_extra", VirtIONet, host_features, |
87108bb2 | 2865 | VIRTIO_NET_F_CTRL_RX_EXTRA, true), |
127833ee | 2866 | DEFINE_PROP_BIT64("ctrl_mac_addr", VirtIONet, host_features, |
87108bb2 | 2867 | VIRTIO_NET_F_CTRL_MAC_ADDR, true), |
127833ee | 2868 | DEFINE_PROP_BIT64("ctrl_guest_offloads", VirtIONet, host_features, |
87108bb2 | 2869 | VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), |
127833ee | 2870 | DEFINE_PROP_BIT64("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), |
2974e916 YB |
2871 | DEFINE_PROP_BIT64("guest_rsc_ext", VirtIONet, host_features, |
2872 | VIRTIO_NET_F_RSC_EXT, false), | |
2873 | DEFINE_PROP_UINT32("rsc_interval", VirtIONet, rsc_timeout, | |
2874 | VIRTIO_NET_RSC_DEFAULT_INTERVAL), | |
17ec5a86 FK |
2875 | DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), |
2876 | DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, | |
87108bb2 | 2877 | TX_TIMER_INTERVAL), |
17ec5a86 FK |
2878 | DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), |
2879 | DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), | |
1c0fbfa3 MT |
2880 | DEFINE_PROP_UINT16("rx_queue_size", VirtIONet, net_conf.rx_queue_size, |
2881 | VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE), | |
9b02e161 WW |
2882 | DEFINE_PROP_UINT16("tx_queue_size", VirtIONet, net_conf.tx_queue_size, |
2883 | VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE), | |
a93e599d | 2884 | DEFINE_PROP_UINT16("host_mtu", VirtIONet, net_conf.mtu, 0), |
75ebec11 MC |
2885 | DEFINE_PROP_BOOL("x-mtu-bypass-backend", VirtIONet, mtu_bypass_backend, |
2886 | true), | |
9473939e JB |
2887 | DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN), |
2888 | DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str), | |
17ec5a86 FK |
2889 | DEFINE_PROP_END_OF_LIST(), |
2890 | }; | |
2891 | ||
2892 | static void virtio_net_class_init(ObjectClass *klass, void *data) | |
2893 | { | |
2894 | DeviceClass *dc = DEVICE_CLASS(klass); | |
2895 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
e6f746b3 | 2896 | |
17ec5a86 | 2897 | dc->props = virtio_net_properties; |
290c2428 | 2898 | dc->vmsd = &vmstate_virtio_net; |
125ee0ed | 2899 | set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
e6f746b3 | 2900 | vdc->realize = virtio_net_device_realize; |
306ec6c3 | 2901 | vdc->unrealize = virtio_net_device_unrealize; |
17ec5a86 FK |
2902 | vdc->get_config = virtio_net_get_config; |
2903 | vdc->set_config = virtio_net_set_config; | |
2904 | vdc->get_features = virtio_net_get_features; | |
2905 | vdc->set_features = virtio_net_set_features; | |
2906 | vdc->bad_features = virtio_net_bad_features; | |
2907 | vdc->reset = virtio_net_reset; | |
2908 | vdc->set_status = virtio_net_set_status; | |
2909 | vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; | |
2910 | vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; | |
2a083ffd | 2911 | vdc->legacy_features |= (0x1 << VIRTIO_NET_F_GSO); |
982b78c5 | 2912 | vdc->vmsd = &vmstate_virtio_net_device; |
17ec5a86 FK |
2913 | } |
2914 | ||
2915 | static const TypeInfo virtio_net_info = { | |
2916 | .name = TYPE_VIRTIO_NET, | |
2917 | .parent = TYPE_VIRTIO_DEVICE, | |
2918 | .instance_size = sizeof(VirtIONet), | |
2919 | .instance_init = virtio_net_instance_init, | |
2920 | .class_init = virtio_net_class_init, | |
2921 | }; | |
2922 | ||
2923 | static void virtio_register_types(void) | |
2924 | { | |
2925 | type_register_static(&virtio_net_info); | |
2926 | } | |
2927 | ||
2928 | type_init(virtio_register_types) |