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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" |
0d09e41a | 16 | #include "hw/virtio/virtio.h" |
1422e32d | 17 | #include "net/net.h" |
7200ac3c | 18 | #include "net/checksum.h" |
a8ed73f7 | 19 | #include "net/tap.h" |
1de7afc9 PB |
20 | #include "qemu/error-report.h" |
21 | #include "qemu/timer.h" | |
0d09e41a PB |
22 | #include "hw/virtio/virtio-net.h" |
23 | #include "net/vhost_net.h" | |
17ec5a86 | 24 | #include "hw/virtio/virtio-bus.h" |
e688df6b | 25 | #include "qapi/error.h" |
9af23989 | 26 | #include "qapi/qapi-events-net.h" |
1399c60d | 27 | #include "hw/virtio/virtio-access.h" |
f8d806c9 | 28 | #include "migration/misc.h" |
9473939e | 29 | #include "standard-headers/linux/ethtool.h" |
fbe78f4f | 30 | |
0ce0e8f4 | 31 | #define VIRTIO_NET_VM_VERSION 11 |
b6503ed9 | 32 | |
4ffb17f5 | 33 | #define MAC_TABLE_ENTRIES 64 |
f21c0ed9 | 34 | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
9d6271b8 | 35 | |
1c0fbfa3 MT |
36 | /* previously fixed value */ |
37 | #define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256 | |
9b02e161 WW |
38 | #define VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE 256 |
39 | ||
1c0fbfa3 MT |
40 | /* for now, only allow larger queues; with virtio-1, guest can downsize */ |
41 | #define VIRTIO_NET_RX_QUEUE_MIN_SIZE VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE | |
9b02e161 | 42 | #define VIRTIO_NET_TX_QUEUE_MIN_SIZE VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE |
1c0fbfa3 | 43 | |
2974e916 YB |
44 | #define VIRTIO_NET_IP4_ADDR_SIZE 8 /* ipv4 saddr + daddr */ |
45 | ||
46 | #define VIRTIO_NET_TCP_FLAG 0x3F | |
47 | #define VIRTIO_NET_TCP_HDR_LENGTH 0xF000 | |
48 | ||
49 | /* IPv4 max payload, 16 bits in the header */ | |
50 | #define VIRTIO_NET_MAX_IP4_PAYLOAD (65535 - sizeof(struct ip_header)) | |
51 | #define VIRTIO_NET_MAX_TCP_PAYLOAD 65535 | |
52 | ||
53 | /* header length value in ip header without option */ | |
54 | #define VIRTIO_NET_IP4_HEADER_LENGTH 5 | |
55 | ||
56 | #define VIRTIO_NET_IP6_ADDR_SIZE 32 /* ipv6 saddr + daddr */ | |
57 | #define VIRTIO_NET_MAX_IP6_PAYLOAD VIRTIO_NET_MAX_TCP_PAYLOAD | |
58 | ||
59 | /* Purge coalesced packets timer interval, This value affects the performance | |
60 | a lot, and should be tuned carefully, '300000'(300us) is the recommended | |
61 | value to pass the WHQL test, '50000' can gain 2x netperf throughput with | |
62 | tso/gso/gro 'off'. */ | |
63 | #define VIRTIO_NET_RSC_DEFAULT_INTERVAL 300000 | |
64 | ||
65 | /* temporary until standard header include it */ | |
66 | #if !defined(VIRTIO_NET_HDR_F_RSC_INFO) | |
67 | ||
68 | #define VIRTIO_NET_HDR_F_RSC_INFO 4 /* rsc_ext data in csum_ fields */ | |
d47e5e31 | 69 | #define VIRTIO_NET_F_RSC_EXT 61 |
2974e916 YB |
70 | |
71 | static inline __virtio16 *virtio_net_rsc_ext_num_packets( | |
72 | struct virtio_net_hdr *hdr) | |
73 | { | |
74 | return &hdr->csum_start; | |
75 | } | |
76 | ||
77 | static inline __virtio16 *virtio_net_rsc_ext_num_dupacks( | |
78 | struct virtio_net_hdr *hdr) | |
79 | { | |
80 | return &hdr->csum_offset; | |
81 | } | |
82 | ||
83 | #endif | |
84 | ||
14f9b664 JL |
85 | /* |
86 | * Calculate the number of bytes up to and including the given 'field' of | |
87 | * 'container'. | |
88 | */ | |
89 | #define endof(container, field) \ | |
f18793b0 | 90 | (offsetof(container, field) + sizeof_field(container, field)) |
14f9b664 JL |
91 | |
92 | typedef struct VirtIOFeature { | |
127833ee | 93 | uint64_t flags; |
14f9b664 JL |
94 | size_t end; |
95 | } VirtIOFeature; | |
96 | ||
97 | static VirtIOFeature feature_sizes[] = { | |
127833ee | 98 | {.flags = 1ULL << VIRTIO_NET_F_MAC, |
14f9b664 | 99 | .end = endof(struct virtio_net_config, mac)}, |
127833ee | 100 | {.flags = 1ULL << VIRTIO_NET_F_STATUS, |
14f9b664 | 101 | .end = endof(struct virtio_net_config, status)}, |
127833ee | 102 | {.flags = 1ULL << VIRTIO_NET_F_MQ, |
14f9b664 | 103 | .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, |
127833ee | 104 | {.flags = 1ULL << VIRTIO_NET_F_MTU, |
a93e599d | 105 | .end = endof(struct virtio_net_config, mtu)}, |
9473939e JB |
106 | {.flags = 1ULL << VIRTIO_NET_F_SPEED_DUPLEX, |
107 | .end = endof(struct virtio_net_config, duplex)}, | |
14f9b664 JL |
108 | {} |
109 | }; | |
110 | ||
fed699f9 | 111 | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) |
0c87e93e JW |
112 | { |
113 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
114 | ||
fed699f9 | 115 | return &n->vqs[nc->queue_index]; |
0c87e93e | 116 | } |
fed699f9 JW |
117 | |
118 | static int vq2q(int queue_index) | |
119 | { | |
120 | return queue_index / 2; | |
121 | } | |
122 | ||
fbe78f4f AL |
123 | /* TODO |
124 | * - we could suppress RX interrupt if we were so inclined. | |
125 | */ | |
126 | ||
0f03eca6 | 127 | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
fbe78f4f | 128 | { |
17a0ca55 | 129 | VirtIONet *n = VIRTIO_NET(vdev); |
fbe78f4f AL |
130 | struct virtio_net_config netcfg; |
131 | ||
1399c60d RR |
132 | virtio_stw_p(vdev, &netcfg.status, n->status); |
133 | virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); | |
a93e599d | 134 | virtio_stw_p(vdev, &netcfg.mtu, n->net_conf.mtu); |
79674068 | 135 | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
9473939e JB |
136 | virtio_stl_p(vdev, &netcfg.speed, n->net_conf.speed); |
137 | netcfg.duplex = n->net_conf.duplex; | |
14f9b664 | 138 | memcpy(config, &netcfg, n->config_size); |
fbe78f4f AL |
139 | } |
140 | ||
0f03eca6 AL |
141 | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
142 | { | |
17a0ca55 | 143 | VirtIONet *n = VIRTIO_NET(vdev); |
14f9b664 | 144 | struct virtio_net_config netcfg = {}; |
0f03eca6 | 145 | |
14f9b664 | 146 | memcpy(&netcfg, config, n->config_size); |
0f03eca6 | 147 | |
95129d6f CH |
148 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) && |
149 | !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) && | |
c1943a3f | 150 | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
79674068 | 151 | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
b356f76d | 152 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
0f03eca6 AL |
153 | } |
154 | } | |
155 | ||
783e7706 MT |
156 | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
157 | { | |
17a0ca55 | 158 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
783e7706 | 159 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && |
17a0ca55 | 160 | (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; |
783e7706 MT |
161 | } |
162 | ||
f57fcf70 JW |
163 | static void virtio_net_announce_timer(void *opaque) |
164 | { | |
165 | VirtIONet *n = opaque; | |
166 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
167 | ||
168 | n->announce_counter--; | |
169 | n->status |= VIRTIO_NET_S_ANNOUNCE; | |
170 | virtio_notify_config(vdev); | |
171 | } | |
172 | ||
783e7706 | 173 | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
afbaa7b4 | 174 | { |
17a0ca55 | 175 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b356f76d | 176 | NetClientState *nc = qemu_get_queue(n->nic); |
fed699f9 | 177 | int queues = n->multiqueue ? n->max_queues : 1; |
b356f76d | 178 | |
ed8b4afe | 179 | if (!get_vhost_net(nc->peer)) { |
afbaa7b4 MT |
180 | return; |
181 | } | |
fed699f9 | 182 | |
8c1ac475 RK |
183 | if ((virtio_net_started(n, status) && !nc->peer->link_down) == |
184 | !!n->vhost_started) { | |
afbaa7b4 MT |
185 | return; |
186 | } | |
187 | if (!n->vhost_started) { | |
086abc1c MT |
188 | int r, i; |
189 | ||
1bfa316c GK |
190 | if (n->needs_vnet_hdr_swap) { |
191 | error_report("backend does not support %s vnet headers; " | |
192 | "falling back on userspace virtio", | |
193 | virtio_is_big_endian(vdev) ? "BE" : "LE"); | |
194 | return; | |
195 | } | |
196 | ||
086abc1c MT |
197 | /* Any packets outstanding? Purge them to avoid touching rings |
198 | * when vhost is running. | |
199 | */ | |
200 | for (i = 0; i < queues; i++) { | |
201 | NetClientState *qnc = qemu_get_subqueue(n->nic, i); | |
202 | ||
203 | /* Purge both directions: TX and RX. */ | |
204 | qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); | |
205 | qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); | |
206 | } | |
207 | ||
a93e599d MC |
208 | if (virtio_has_feature(vdev->guest_features, VIRTIO_NET_F_MTU)) { |
209 | r = vhost_net_set_mtu(get_vhost_net(nc->peer), n->net_conf.mtu); | |
210 | if (r < 0) { | |
211 | error_report("%uBytes MTU not supported by the backend", | |
212 | n->net_conf.mtu); | |
213 | ||
214 | return; | |
215 | } | |
216 | } | |
217 | ||
1830b80f | 218 | n->vhost_started = 1; |
17a0ca55 | 219 | r = vhost_net_start(vdev, n->nic->ncs, queues); |
afbaa7b4 | 220 | if (r < 0) { |
e7b43f7e SH |
221 | error_report("unable to start vhost net: %d: " |
222 | "falling back on userspace virtio", -r); | |
1830b80f | 223 | n->vhost_started = 0; |
afbaa7b4 MT |
224 | } |
225 | } else { | |
17a0ca55 | 226 | vhost_net_stop(vdev, n->nic->ncs, queues); |
afbaa7b4 MT |
227 | n->vhost_started = 0; |
228 | } | |
229 | } | |
230 | ||
1bfa316c GK |
231 | static int virtio_net_set_vnet_endian_one(VirtIODevice *vdev, |
232 | NetClientState *peer, | |
233 | bool enable) | |
234 | { | |
235 | if (virtio_is_big_endian(vdev)) { | |
236 | return qemu_set_vnet_be(peer, enable); | |
237 | } else { | |
238 | return qemu_set_vnet_le(peer, enable); | |
239 | } | |
240 | } | |
241 | ||
242 | static bool virtio_net_set_vnet_endian(VirtIODevice *vdev, NetClientState *ncs, | |
243 | int queues, bool enable) | |
244 | { | |
245 | int i; | |
246 | ||
247 | for (i = 0; i < queues; i++) { | |
248 | if (virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, enable) < 0 && | |
249 | enable) { | |
250 | while (--i >= 0) { | |
251 | virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, false); | |
252 | } | |
253 | ||
254 | return true; | |
255 | } | |
256 | } | |
257 | ||
258 | return false; | |
259 | } | |
260 | ||
261 | static void virtio_net_vnet_endian_status(VirtIONet *n, uint8_t status) | |
262 | { | |
263 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
264 | int queues = n->multiqueue ? n->max_queues : 1; | |
265 | ||
266 | if (virtio_net_started(n, status)) { | |
267 | /* Before using the device, we tell the network backend about the | |
268 | * endianness to use when parsing vnet headers. If the backend | |
269 | * can't do it, we fallback onto fixing the headers in the core | |
270 | * virtio-net code. | |
271 | */ | |
272 | n->needs_vnet_hdr_swap = virtio_net_set_vnet_endian(vdev, n->nic->ncs, | |
273 | queues, true); | |
274 | } else if (virtio_net_started(n, vdev->status)) { | |
275 | /* After using the device, we need to reset the network backend to | |
276 | * the default (guest native endianness), otherwise the guest may | |
277 | * lose network connectivity if it is rebooted into a different | |
278 | * endianness. | |
279 | */ | |
280 | virtio_net_set_vnet_endian(vdev, n->nic->ncs, queues, false); | |
281 | } | |
282 | } | |
283 | ||
283e2c2a YB |
284 | static void virtio_net_drop_tx_queue_data(VirtIODevice *vdev, VirtQueue *vq) |
285 | { | |
286 | unsigned int dropped = virtqueue_drop_all(vq); | |
287 | if (dropped) { | |
288 | virtio_notify(vdev, vq); | |
289 | } | |
290 | } | |
291 | ||
783e7706 MT |
292 | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
293 | { | |
17a0ca55 | 294 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
295 | VirtIONetQueue *q; |
296 | int i; | |
297 | uint8_t queue_status; | |
783e7706 | 298 | |
1bfa316c | 299 | virtio_net_vnet_endian_status(n, status); |
783e7706 MT |
300 | virtio_net_vhost_status(n, status); |
301 | ||
fed699f9 | 302 | for (i = 0; i < n->max_queues; i++) { |
38705bb5 FZ |
303 | NetClientState *ncs = qemu_get_subqueue(n->nic, i); |
304 | bool queue_started; | |
fed699f9 | 305 | q = &n->vqs[i]; |
783e7706 | 306 | |
fed699f9 JW |
307 | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
308 | queue_status = 0; | |
783e7706 | 309 | } else { |
fed699f9 | 310 | queue_status = status; |
783e7706 | 311 | } |
38705bb5 FZ |
312 | queue_started = |
313 | virtio_net_started(n, queue_status) && !n->vhost_started; | |
314 | ||
315 | if (queue_started) { | |
316 | qemu_flush_queued_packets(ncs); | |
317 | } | |
fed699f9 JW |
318 | |
319 | if (!q->tx_waiting) { | |
320 | continue; | |
321 | } | |
322 | ||
38705bb5 | 323 | if (queue_started) { |
fed699f9 | 324 | if (q->tx_timer) { |
bc72ad67 AB |
325 | timer_mod(q->tx_timer, |
326 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
fed699f9 JW |
327 | } else { |
328 | qemu_bh_schedule(q->tx_bh); | |
329 | } | |
783e7706 | 330 | } else { |
fed699f9 | 331 | if (q->tx_timer) { |
bc72ad67 | 332 | timer_del(q->tx_timer); |
fed699f9 JW |
333 | } else { |
334 | qemu_bh_cancel(q->tx_bh); | |
335 | } | |
283e2c2a | 336 | if ((n->status & VIRTIO_NET_S_LINK_UP) == 0 && |
70e53e6e JW |
337 | (queue_status & VIRTIO_CONFIG_S_DRIVER_OK) && |
338 | vdev->vm_running) { | |
283e2c2a YB |
339 | /* if tx is waiting we are likely have some packets in tx queue |
340 | * and disabled notification */ | |
341 | q->tx_waiting = 0; | |
342 | virtio_queue_set_notification(q->tx_vq, 1); | |
343 | virtio_net_drop_tx_queue_data(vdev, q->tx_vq); | |
344 | } | |
783e7706 MT |
345 | } |
346 | } | |
347 | } | |
348 | ||
4e68f7a0 | 349 | static void virtio_net_set_link_status(NetClientState *nc) |
554c97dd | 350 | { |
cc1f0f45 | 351 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 352 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
554c97dd AL |
353 | uint16_t old_status = n->status; |
354 | ||
eb6b6c12 | 355 | if (nc->link_down) |
554c97dd AL |
356 | n->status &= ~VIRTIO_NET_S_LINK_UP; |
357 | else | |
358 | n->status |= VIRTIO_NET_S_LINK_UP; | |
359 | ||
360 | if (n->status != old_status) | |
17a0ca55 | 361 | virtio_notify_config(vdev); |
afbaa7b4 | 362 | |
17a0ca55 | 363 | virtio_net_set_status(vdev, vdev->status); |
554c97dd AL |
364 | } |
365 | ||
b1be4280 AK |
366 | static void rxfilter_notify(NetClientState *nc) |
367 | { | |
b1be4280 AK |
368 | VirtIONet *n = qemu_get_nic_opaque(nc); |
369 | ||
370 | if (nc->rxfilter_notify_enabled) { | |
96e35046 | 371 | gchar *path = object_get_canonical_path(OBJECT(n->qdev)); |
06150279 | 372 | qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, |
3ab72385 | 373 | n->netclient_name, path); |
96e35046 | 374 | g_free(path); |
b1be4280 AK |
375 | |
376 | /* disable event notification to avoid events flooding */ | |
377 | nc->rxfilter_notify_enabled = 0; | |
378 | } | |
379 | } | |
380 | ||
f7bc8ef8 AK |
381 | static intList *get_vlan_table(VirtIONet *n) |
382 | { | |
383 | intList *list, *entry; | |
384 | int i, j; | |
385 | ||
386 | list = NULL; | |
387 | for (i = 0; i < MAX_VLAN >> 5; i++) { | |
388 | for (j = 0; n->vlans[i] && j <= 0x1f; j++) { | |
389 | if (n->vlans[i] & (1U << j)) { | |
390 | entry = g_malloc0(sizeof(*entry)); | |
391 | entry->value = (i << 5) + j; | |
392 | entry->next = list; | |
393 | list = entry; | |
394 | } | |
395 | } | |
396 | } | |
397 | ||
398 | return list; | |
399 | } | |
400 | ||
b1be4280 AK |
401 | static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) |
402 | { | |
403 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
f7bc8ef8 | 404 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b1be4280 AK |
405 | RxFilterInfo *info; |
406 | strList *str_list, *entry; | |
f7bc8ef8 | 407 | int i; |
b1be4280 AK |
408 | |
409 | info = g_malloc0(sizeof(*info)); | |
410 | info->name = g_strdup(nc->name); | |
411 | info->promiscuous = n->promisc; | |
412 | ||
413 | if (n->nouni) { | |
414 | info->unicast = RX_STATE_NONE; | |
415 | } else if (n->alluni) { | |
416 | info->unicast = RX_STATE_ALL; | |
417 | } else { | |
418 | info->unicast = RX_STATE_NORMAL; | |
419 | } | |
420 | ||
421 | if (n->nomulti) { | |
422 | info->multicast = RX_STATE_NONE; | |
423 | } else if (n->allmulti) { | |
424 | info->multicast = RX_STATE_ALL; | |
425 | } else { | |
426 | info->multicast = RX_STATE_NORMAL; | |
427 | } | |
428 | ||
429 | info->broadcast_allowed = n->nobcast; | |
430 | info->multicast_overflow = n->mac_table.multi_overflow; | |
431 | info->unicast_overflow = n->mac_table.uni_overflow; | |
432 | ||
b0575ba4 | 433 | info->main_mac = qemu_mac_strdup_printf(n->mac); |
b1be4280 AK |
434 | |
435 | str_list = NULL; | |
436 | for (i = 0; i < n->mac_table.first_multi; i++) { | |
437 | entry = g_malloc0(sizeof(*entry)); | |
b0575ba4 | 438 | entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); |
b1be4280 AK |
439 | entry->next = str_list; |
440 | str_list = entry; | |
441 | } | |
442 | info->unicast_table = str_list; | |
443 | ||
444 | str_list = NULL; | |
445 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
446 | entry = g_malloc0(sizeof(*entry)); | |
b0575ba4 | 447 | entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); |
b1be4280 AK |
448 | entry->next = str_list; |
449 | str_list = entry; | |
450 | } | |
451 | info->multicast_table = str_list; | |
f7bc8ef8 | 452 | info->vlan_table = get_vlan_table(n); |
b1be4280 | 453 | |
95129d6f | 454 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) { |
f7bc8ef8 AK |
455 | info->vlan = RX_STATE_ALL; |
456 | } else if (!info->vlan_table) { | |
457 | info->vlan = RX_STATE_NONE; | |
458 | } else { | |
459 | info->vlan = RX_STATE_NORMAL; | |
b1be4280 | 460 | } |
b1be4280 AK |
461 | |
462 | /* enable event notification after query */ | |
463 | nc->rxfilter_notify_enabled = 1; | |
464 | ||
465 | return info; | |
466 | } | |
467 | ||
002437cd AL |
468 | static void virtio_net_reset(VirtIODevice *vdev) |
469 | { | |
17a0ca55 | 470 | VirtIONet *n = VIRTIO_NET(vdev); |
94b52958 | 471 | int i; |
002437cd AL |
472 | |
473 | /* Reset back to compatibility mode */ | |
474 | n->promisc = 1; | |
475 | n->allmulti = 0; | |
015cb166 AW |
476 | n->alluni = 0; |
477 | n->nomulti = 0; | |
478 | n->nouni = 0; | |
479 | n->nobcast = 0; | |
fed699f9 JW |
480 | /* multiqueue is disabled by default */ |
481 | n->curr_queues = 1; | |
f57fcf70 JW |
482 | timer_del(n->announce_timer); |
483 | n->announce_counter = 0; | |
484 | n->status &= ~VIRTIO_NET_S_ANNOUNCE; | |
b6503ed9 | 485 | |
f21c0ed9 | 486 | /* Flush any MAC and VLAN filter table state */ |
b6503ed9 | 487 | n->mac_table.in_use = 0; |
2d9aba39 | 488 | n->mac_table.first_multi = 0; |
8fd2a2f1 AW |
489 | n->mac_table.multi_overflow = 0; |
490 | n->mac_table.uni_overflow = 0; | |
b6503ed9 | 491 | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); |
41dc8a67 | 492 | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
702d66a8 | 493 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
f21c0ed9 | 494 | memset(n->vlans, 0, MAX_VLAN >> 3); |
94b52958 GK |
495 | |
496 | /* Flush any async TX */ | |
497 | for (i = 0; i < n->max_queues; i++) { | |
498 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
499 | ||
500 | if (nc->peer) { | |
501 | qemu_flush_or_purge_queued_packets(nc->peer, true); | |
502 | assert(!virtio_net_get_subqueue(nc)->async_tx.elem); | |
503 | } | |
504 | } | |
002437cd AL |
505 | } |
506 | ||
6e371ab8 | 507 | static void peer_test_vnet_hdr(VirtIONet *n) |
3a330134 | 508 | { |
b356f76d JW |
509 | NetClientState *nc = qemu_get_queue(n->nic); |
510 | if (!nc->peer) { | |
6e371ab8 | 511 | return; |
b356f76d | 512 | } |
3a330134 | 513 | |
d6085e3a | 514 | n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); |
6e371ab8 | 515 | } |
3a330134 | 516 | |
6e371ab8 MT |
517 | static int peer_has_vnet_hdr(VirtIONet *n) |
518 | { | |
3a330134 MM |
519 | return n->has_vnet_hdr; |
520 | } | |
521 | ||
0ce0e8f4 MM |
522 | static int peer_has_ufo(VirtIONet *n) |
523 | { | |
524 | if (!peer_has_vnet_hdr(n)) | |
525 | return 0; | |
526 | ||
d6085e3a | 527 | n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); |
0ce0e8f4 MM |
528 | |
529 | return n->has_ufo; | |
530 | } | |
531 | ||
bb9d17f8 CH |
532 | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs, |
533 | int version_1) | |
ff3a8066 | 534 | { |
fed699f9 JW |
535 | int i; |
536 | NetClientState *nc; | |
537 | ||
ff3a8066 MT |
538 | n->mergeable_rx_bufs = mergeable_rx_bufs; |
539 | ||
bb9d17f8 CH |
540 | if (version_1) { |
541 | n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); | |
542 | } else { | |
543 | n->guest_hdr_len = n->mergeable_rx_bufs ? | |
544 | sizeof(struct virtio_net_hdr_mrg_rxbuf) : | |
545 | sizeof(struct virtio_net_hdr); | |
546 | } | |
ff3a8066 | 547 | |
fed699f9 JW |
548 | for (i = 0; i < n->max_queues; i++) { |
549 | nc = qemu_get_subqueue(n->nic, i); | |
550 | ||
551 | if (peer_has_vnet_hdr(n) && | |
d6085e3a SH |
552 | qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { |
553 | qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); | |
fed699f9 JW |
554 | n->host_hdr_len = n->guest_hdr_len; |
555 | } | |
ff3a8066 MT |
556 | } |
557 | } | |
558 | ||
2eef278b MT |
559 | static int virtio_net_max_tx_queue_size(VirtIONet *n) |
560 | { | |
561 | NetClientState *peer = n->nic_conf.peers.ncs[0]; | |
562 | ||
563 | /* | |
564 | * Backends other than vhost-user don't support max queue size. | |
565 | */ | |
566 | if (!peer) { | |
567 | return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE; | |
568 | } | |
569 | ||
570 | if (peer->info->type != NET_CLIENT_DRIVER_VHOST_USER) { | |
571 | return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE; | |
572 | } | |
573 | ||
574 | return VIRTQUEUE_MAX_SIZE; | |
575 | } | |
576 | ||
fed699f9 JW |
577 | static int peer_attach(VirtIONet *n, int index) |
578 | { | |
579 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
580 | ||
581 | if (!nc->peer) { | |
582 | return 0; | |
583 | } | |
584 | ||
f394b2e2 | 585 | if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) { |
7263a0ad CO |
586 | vhost_set_vring_enable(nc->peer, 1); |
587 | } | |
588 | ||
f394b2e2 | 589 | if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) { |
fed699f9 JW |
590 | return 0; |
591 | } | |
592 | ||
1074b879 JW |
593 | if (n->max_queues == 1) { |
594 | return 0; | |
595 | } | |
596 | ||
fed699f9 JW |
597 | return tap_enable(nc->peer); |
598 | } | |
599 | ||
600 | static int peer_detach(VirtIONet *n, int index) | |
601 | { | |
602 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
603 | ||
604 | if (!nc->peer) { | |
605 | return 0; | |
606 | } | |
607 | ||
f394b2e2 | 608 | if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) { |
7263a0ad CO |
609 | vhost_set_vring_enable(nc->peer, 0); |
610 | } | |
611 | ||
f394b2e2 | 612 | if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) { |
fed699f9 JW |
613 | return 0; |
614 | } | |
615 | ||
616 | return tap_disable(nc->peer); | |
617 | } | |
618 | ||
619 | static void virtio_net_set_queues(VirtIONet *n) | |
620 | { | |
621 | int i; | |
ddfa83ea | 622 | int r; |
fed699f9 | 623 | |
68b5f314 YB |
624 | if (n->nic->peer_deleted) { |
625 | return; | |
626 | } | |
627 | ||
fed699f9 JW |
628 | for (i = 0; i < n->max_queues; i++) { |
629 | if (i < n->curr_queues) { | |
ddfa83ea JS |
630 | r = peer_attach(n, i); |
631 | assert(!r); | |
fed699f9 | 632 | } else { |
ddfa83ea JS |
633 | r = peer_detach(n, i); |
634 | assert(!r); | |
fed699f9 JW |
635 | } |
636 | } | |
637 | } | |
638 | ||
ec57db16 | 639 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); |
fed699f9 | 640 | |
9d5b731d JW |
641 | static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features, |
642 | Error **errp) | |
fbe78f4f | 643 | { |
17a0ca55 | 644 | VirtIONet *n = VIRTIO_NET(vdev); |
b356f76d | 645 | NetClientState *nc = qemu_get_queue(n->nic); |
fbe78f4f | 646 | |
da3e8a23 SZ |
647 | /* Firstly sync all virtio-net possible supported features */ |
648 | features |= n->host_features; | |
649 | ||
0cd09c3a | 650 | virtio_add_feature(&features, VIRTIO_NET_F_MAC); |
c9f79a3f | 651 | |
6e371ab8 | 652 | if (!peer_has_vnet_hdr(n)) { |
0cd09c3a CH |
653 | virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); |
654 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); | |
655 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); | |
656 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); | |
8172539d | 657 | |
0cd09c3a CH |
658 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); |
659 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); | |
660 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); | |
661 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); | |
8172539d | 662 | } |
3a330134 | 663 | |
8172539d | 664 | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { |
0cd09c3a CH |
665 | virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); |
666 | virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); | |
3a330134 MM |
667 | } |
668 | ||
ed8b4afe | 669 | if (!get_vhost_net(nc->peer)) { |
9bc6304c MT |
670 | return features; |
671 | } | |
2974e916 | 672 | |
75ebec11 MC |
673 | features = vhost_net_get_features(get_vhost_net(nc->peer), features); |
674 | vdev->backend_features = features; | |
675 | ||
676 | if (n->mtu_bypass_backend && | |
677 | (n->host_features & 1ULL << VIRTIO_NET_F_MTU)) { | |
678 | features |= (1ULL << VIRTIO_NET_F_MTU); | |
679 | } | |
680 | ||
681 | return features; | |
fbe78f4f AL |
682 | } |
683 | ||
019a3edb | 684 | static uint64_t virtio_net_bad_features(VirtIODevice *vdev) |
8eca6b1b | 685 | { |
019a3edb | 686 | uint64_t features = 0; |
8eca6b1b AL |
687 | |
688 | /* Linux kernel 2.6.25. It understood MAC (as everyone must), | |
689 | * but also these: */ | |
0cd09c3a CH |
690 | virtio_add_feature(&features, VIRTIO_NET_F_MAC); |
691 | virtio_add_feature(&features, VIRTIO_NET_F_CSUM); | |
692 | virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4); | |
693 | virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6); | |
694 | virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN); | |
8eca6b1b | 695 | |
8172539d | 696 | return features; |
8eca6b1b AL |
697 | } |
698 | ||
644c9858 DF |
699 | static void virtio_net_apply_guest_offloads(VirtIONet *n) |
700 | { | |
ad37bb3b | 701 | qemu_set_offload(qemu_get_queue(n->nic)->peer, |
644c9858 DF |
702 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), |
703 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), | |
704 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), | |
705 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), | |
706 | !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); | |
707 | } | |
708 | ||
709 | static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) | |
710 | { | |
711 | static const uint64_t guest_offloads_mask = | |
712 | (1ULL << VIRTIO_NET_F_GUEST_CSUM) | | |
713 | (1ULL << VIRTIO_NET_F_GUEST_TSO4) | | |
714 | (1ULL << VIRTIO_NET_F_GUEST_TSO6) | | |
715 | (1ULL << VIRTIO_NET_F_GUEST_ECN) | | |
716 | (1ULL << VIRTIO_NET_F_GUEST_UFO); | |
717 | ||
718 | return guest_offloads_mask & features; | |
719 | } | |
720 | ||
721 | static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) | |
722 | { | |
723 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
724 | return virtio_net_guest_offloads_by_features(vdev->guest_features); | |
725 | } | |
726 | ||
d5aaa1b0 | 727 | static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) |
fbe78f4f | 728 | { |
17a0ca55 | 729 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 JW |
730 | int i; |
731 | ||
75ebec11 MC |
732 | if (n->mtu_bypass_backend && |
733 | !virtio_has_feature(vdev->backend_features, VIRTIO_NET_F_MTU)) { | |
734 | features &= ~(1ULL << VIRTIO_NET_F_MTU); | |
735 | } | |
736 | ||
ef546f12 | 737 | virtio_net_set_multiqueue(n, |
95129d6f | 738 | virtio_has_feature(features, VIRTIO_NET_F_MQ)); |
fbe78f4f | 739 | |
ef546f12 | 740 | virtio_net_set_mrg_rx_bufs(n, |
95129d6f CH |
741 | virtio_has_feature(features, |
742 | VIRTIO_NET_F_MRG_RXBUF), | |
743 | virtio_has_feature(features, | |
744 | VIRTIO_F_VERSION_1)); | |
f5436dd9 | 745 | |
2974e916 YB |
746 | n->rsc4_enabled = virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT) && |
747 | virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO4); | |
748 | n->rsc6_enabled = virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT) && | |
749 | virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO6); | |
750 | ||
f5436dd9 | 751 | if (n->has_vnet_hdr) { |
644c9858 DF |
752 | n->curr_guest_offloads = |
753 | virtio_net_guest_offloads_by_features(features); | |
754 | virtio_net_apply_guest_offloads(n); | |
f5436dd9 | 755 | } |
fed699f9 JW |
756 | |
757 | for (i = 0; i < n->max_queues; i++) { | |
758 | NetClientState *nc = qemu_get_subqueue(n->nic, i); | |
759 | ||
ed8b4afe | 760 | if (!get_vhost_net(nc->peer)) { |
fed699f9 JW |
761 | continue; |
762 | } | |
ed8b4afe | 763 | vhost_net_ack_features(get_vhost_net(nc->peer), features); |
dc14a397 | 764 | } |
0b1eaa88 | 765 | |
95129d6f | 766 | if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { |
0b1eaa88 SF |
767 | memset(n->vlans, 0, MAX_VLAN >> 3); |
768 | } else { | |
769 | memset(n->vlans, 0xff, MAX_VLAN >> 3); | |
770 | } | |
fbe78f4f AL |
771 | } |
772 | ||
002437cd | 773 | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 774 | struct iovec *iov, unsigned int iov_cnt) |
002437cd AL |
775 | { |
776 | uint8_t on; | |
921ac5d0 | 777 | size_t s; |
b1be4280 | 778 | NetClientState *nc = qemu_get_queue(n->nic); |
002437cd | 779 | |
921ac5d0 MT |
780 | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
781 | if (s != sizeof(on)) { | |
782 | return VIRTIO_NET_ERR; | |
002437cd AL |
783 | } |
784 | ||
dd23454b | 785 | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { |
002437cd | 786 | n->promisc = on; |
dd23454b | 787 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
002437cd | 788 | n->allmulti = on; |
dd23454b | 789 | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
015cb166 | 790 | n->alluni = on; |
dd23454b | 791 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
015cb166 | 792 | n->nomulti = on; |
dd23454b | 793 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
015cb166 | 794 | n->nouni = on; |
dd23454b | 795 | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
015cb166 | 796 | n->nobcast = on; |
921ac5d0 | 797 | } else { |
002437cd | 798 | return VIRTIO_NET_ERR; |
921ac5d0 | 799 | } |
002437cd | 800 | |
b1be4280 AK |
801 | rxfilter_notify(nc); |
802 | ||
002437cd AL |
803 | return VIRTIO_NET_OK; |
804 | } | |
805 | ||
644c9858 DF |
806 | static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, |
807 | struct iovec *iov, unsigned int iov_cnt) | |
808 | { | |
809 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
810 | uint64_t offloads; | |
811 | size_t s; | |
812 | ||
95129d6f | 813 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { |
644c9858 DF |
814 | return VIRTIO_NET_ERR; |
815 | } | |
816 | ||
817 | s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); | |
818 | if (s != sizeof(offloads)) { | |
819 | return VIRTIO_NET_ERR; | |
820 | } | |
821 | ||
822 | if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { | |
823 | uint64_t supported_offloads; | |
824 | ||
189ae6bb JW |
825 | offloads = virtio_ldq_p(vdev, &offloads); |
826 | ||
644c9858 DF |
827 | if (!n->has_vnet_hdr) { |
828 | return VIRTIO_NET_ERR; | |
829 | } | |
830 | ||
2974e916 YB |
831 | n->rsc4_enabled = virtio_has_feature(offloads, VIRTIO_NET_F_RSC_EXT) && |
832 | virtio_has_feature(offloads, VIRTIO_NET_F_GUEST_TSO4); | |
833 | n->rsc6_enabled = virtio_has_feature(offloads, VIRTIO_NET_F_RSC_EXT) && | |
834 | virtio_has_feature(offloads, VIRTIO_NET_F_GUEST_TSO6); | |
835 | virtio_clear_feature(&offloads, VIRTIO_NET_F_RSC_EXT); | |
836 | ||
644c9858 DF |
837 | supported_offloads = virtio_net_supported_guest_offloads(n); |
838 | if (offloads & ~supported_offloads) { | |
839 | return VIRTIO_NET_ERR; | |
840 | } | |
841 | ||
842 | n->curr_guest_offloads = offloads; | |
843 | virtio_net_apply_guest_offloads(n); | |
844 | ||
845 | return VIRTIO_NET_OK; | |
846 | } else { | |
847 | return VIRTIO_NET_ERR; | |
848 | } | |
849 | } | |
850 | ||
b6503ed9 | 851 | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 852 | struct iovec *iov, unsigned int iov_cnt) |
b6503ed9 | 853 | { |
1399c60d | 854 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
b6503ed9 | 855 | struct virtio_net_ctrl_mac mac_data; |
921ac5d0 | 856 | size_t s; |
b1be4280 | 857 | NetClientState *nc = qemu_get_queue(n->nic); |
b6503ed9 | 858 | |
c1943a3f AK |
859 | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { |
860 | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { | |
861 | return VIRTIO_NET_ERR; | |
862 | } | |
863 | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); | |
864 | assert(s == sizeof(n->mac)); | |
b356f76d | 865 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
b1be4280 AK |
866 | rxfilter_notify(nc); |
867 | ||
c1943a3f AK |
868 | return VIRTIO_NET_OK; |
869 | } | |
870 | ||
921ac5d0 | 871 | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { |
b6503ed9 | 872 | return VIRTIO_NET_ERR; |
921ac5d0 | 873 | } |
b6503ed9 | 874 | |
cae2e556 AK |
875 | int in_use = 0; |
876 | int first_multi = 0; | |
877 | uint8_t uni_overflow = 0; | |
878 | uint8_t multi_overflow = 0; | |
879 | uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); | |
b6503ed9 | 880 | |
921ac5d0 MT |
881 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
882 | sizeof(mac_data.entries)); | |
1399c60d | 883 | mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); |
921ac5d0 | 884 | if (s != sizeof(mac_data.entries)) { |
b1be4280 | 885 | goto error; |
921ac5d0 MT |
886 | } |
887 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 888 | |
921ac5d0 | 889 | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { |
b1be4280 | 890 | goto error; |
921ac5d0 | 891 | } |
b6503ed9 AL |
892 | |
893 | if (mac_data.entries <= MAC_TABLE_ENTRIES) { | |
cae2e556 | 894 | s = iov_to_buf(iov, iov_cnt, 0, macs, |
921ac5d0 MT |
895 | mac_data.entries * ETH_ALEN); |
896 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 897 | goto error; |
921ac5d0 | 898 | } |
cae2e556 | 899 | in_use += mac_data.entries; |
b6503ed9 | 900 | } else { |
cae2e556 | 901 | uni_overflow = 1; |
b6503ed9 AL |
902 | } |
903 | ||
921ac5d0 MT |
904 | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
905 | ||
cae2e556 | 906 | first_multi = in_use; |
2d9aba39 | 907 | |
921ac5d0 MT |
908 | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, |
909 | sizeof(mac_data.entries)); | |
1399c60d | 910 | mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); |
921ac5d0 | 911 | if (s != sizeof(mac_data.entries)) { |
b1be4280 | 912 | goto error; |
921ac5d0 MT |
913 | } |
914 | ||
915 | iov_discard_front(&iov, &iov_cnt, s); | |
b6503ed9 | 916 | |
921ac5d0 | 917 | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { |
b1be4280 | 918 | goto error; |
921ac5d0 | 919 | } |
b6503ed9 | 920 | |
edc24385 | 921 | if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { |
cae2e556 | 922 | s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], |
921ac5d0 MT |
923 | mac_data.entries * ETH_ALEN); |
924 | if (s != mac_data.entries * ETH_ALEN) { | |
b1be4280 | 925 | goto error; |
8fd2a2f1 | 926 | } |
cae2e556 | 927 | in_use += mac_data.entries; |
921ac5d0 | 928 | } else { |
cae2e556 | 929 | multi_overflow = 1; |
b6503ed9 AL |
930 | } |
931 | ||
cae2e556 AK |
932 | n->mac_table.in_use = in_use; |
933 | n->mac_table.first_multi = first_multi; | |
934 | n->mac_table.uni_overflow = uni_overflow; | |
935 | n->mac_table.multi_overflow = multi_overflow; | |
936 | memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); | |
937 | g_free(macs); | |
b1be4280 AK |
938 | rxfilter_notify(nc); |
939 | ||
b6503ed9 | 940 | return VIRTIO_NET_OK; |
b1be4280 AK |
941 | |
942 | error: | |
cae2e556 | 943 | g_free(macs); |
b1be4280 | 944 | return VIRTIO_NET_ERR; |
b6503ed9 AL |
945 | } |
946 | ||
f21c0ed9 | 947 | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
921ac5d0 | 948 | struct iovec *iov, unsigned int iov_cnt) |
f21c0ed9 | 949 | { |
1399c60d | 950 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f21c0ed9 | 951 | uint16_t vid; |
921ac5d0 | 952 | size_t s; |
b1be4280 | 953 | NetClientState *nc = qemu_get_queue(n->nic); |
f21c0ed9 | 954 | |
921ac5d0 | 955 | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
1399c60d | 956 | vid = virtio_lduw_p(vdev, &vid); |
921ac5d0 | 957 | if (s != sizeof(vid)) { |
f21c0ed9 AL |
958 | return VIRTIO_NET_ERR; |
959 | } | |
960 | ||
f21c0ed9 AL |
961 | if (vid >= MAX_VLAN) |
962 | return VIRTIO_NET_ERR; | |
963 | ||
964 | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) | |
965 | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); | |
966 | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) | |
967 | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); | |
968 | else | |
969 | return VIRTIO_NET_ERR; | |
970 | ||
b1be4280 AK |
971 | rxfilter_notify(nc); |
972 | ||
f21c0ed9 AL |
973 | return VIRTIO_NET_OK; |
974 | } | |
975 | ||
f57fcf70 JW |
976 | static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, |
977 | struct iovec *iov, unsigned int iov_cnt) | |
978 | { | |
979 | if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && | |
980 | n->status & VIRTIO_NET_S_ANNOUNCE) { | |
981 | n->status &= ~VIRTIO_NET_S_ANNOUNCE; | |
982 | if (n->announce_counter) { | |
983 | timer_mod(n->announce_timer, | |
984 | qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + | |
985 | self_announce_delay(n->announce_counter)); | |
986 | } | |
987 | return VIRTIO_NET_OK; | |
988 | } else { | |
989 | return VIRTIO_NET_ERR; | |
990 | } | |
991 | } | |
992 | ||
fed699f9 | 993 | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
f8f7c533 | 994 | struct iovec *iov, unsigned int iov_cnt) |
fed699f9 | 995 | { |
17a0ca55 | 996 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
f8f7c533 JW |
997 | struct virtio_net_ctrl_mq mq; |
998 | size_t s; | |
999 | uint16_t queues; | |
fed699f9 | 1000 | |
f8f7c533 JW |
1001 | s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); |
1002 | if (s != sizeof(mq)) { | |
fed699f9 JW |
1003 | return VIRTIO_NET_ERR; |
1004 | } | |
1005 | ||
1006 | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { | |
1007 | return VIRTIO_NET_ERR; | |
1008 | } | |
1009 | ||
1399c60d | 1010 | queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); |
fed699f9 | 1011 | |
f8f7c533 JW |
1012 | if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || |
1013 | queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || | |
1014 | queues > n->max_queues || | |
fed699f9 JW |
1015 | !n->multiqueue) { |
1016 | return VIRTIO_NET_ERR; | |
1017 | } | |
1018 | ||
f8f7c533 | 1019 | n->curr_queues = queues; |
fed699f9 JW |
1020 | /* stop the backend before changing the number of queues to avoid handling a |
1021 | * disabled queue */ | |
17a0ca55 | 1022 | virtio_net_set_status(vdev, vdev->status); |
fed699f9 JW |
1023 | virtio_net_set_queues(n); |
1024 | ||
1025 | return VIRTIO_NET_OK; | |
1026 | } | |
ba7eadb5 | 1027 | |
3d11d36c AL |
1028 | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
1029 | { | |
17a0ca55 | 1030 | VirtIONet *n = VIRTIO_NET(vdev); |
3d11d36c AL |
1031 | struct virtio_net_ctrl_hdr ctrl; |
1032 | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; | |
51b19ebe | 1033 | VirtQueueElement *elem; |
921ac5d0 | 1034 | size_t s; |
771b6ed3 | 1035 | struct iovec *iov, *iov2; |
921ac5d0 | 1036 | unsigned int iov_cnt; |
3d11d36c | 1037 | |
51b19ebe PB |
1038 | for (;;) { |
1039 | elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); | |
1040 | if (!elem) { | |
1041 | break; | |
1042 | } | |
1043 | if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) || | |
1044 | iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) { | |
ba7eadb5 GK |
1045 | virtio_error(vdev, "virtio-net ctrl missing headers"); |
1046 | virtqueue_detach_element(vq, elem, 0); | |
1047 | g_free(elem); | |
1048 | break; | |
3d11d36c AL |
1049 | } |
1050 | ||
51b19ebe PB |
1051 | iov_cnt = elem->out_num; |
1052 | iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num); | |
921ac5d0 MT |
1053 | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); |
1054 | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); | |
1055 | if (s != sizeof(ctrl)) { | |
1056 | status = VIRTIO_NET_ERR; | |
dd23454b | 1057 | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
921ac5d0 MT |
1058 | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
1059 | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { | |
1060 | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); | |
1061 | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { | |
1062 | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); | |
f57fcf70 JW |
1063 | } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { |
1064 | status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); | |
fed699f9 | 1065 | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
f8f7c533 | 1066 | status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); |
644c9858 DF |
1067 | } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { |
1068 | status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); | |
3d11d36c AL |
1069 | } |
1070 | ||
51b19ebe | 1071 | s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status)); |
921ac5d0 | 1072 | assert(s == sizeof(status)); |
3d11d36c | 1073 | |
51b19ebe | 1074 | virtqueue_push(vq, elem, sizeof(status)); |
3d11d36c | 1075 | virtio_notify(vdev, vq); |
771b6ed3 | 1076 | g_free(iov2); |
51b19ebe | 1077 | g_free(elem); |
3d11d36c AL |
1078 | } |
1079 | } | |
1080 | ||
fbe78f4f AL |
1081 | /* RX */ |
1082 | ||
1083 | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) | |
1084 | { | |
17a0ca55 | 1085 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 1086 | int queue_index = vq2q(virtio_get_queue_index(vq)); |
8aeff62d | 1087 | |
fed699f9 | 1088 | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
fbe78f4f AL |
1089 | } |
1090 | ||
4e68f7a0 | 1091 | static int virtio_net_can_receive(NetClientState *nc) |
fbe78f4f | 1092 | { |
cc1f0f45 | 1093 | VirtIONet *n = qemu_get_nic_opaque(nc); |
17a0ca55 | 1094 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
fed699f9 | 1095 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
0c87e93e | 1096 | |
17a0ca55 | 1097 | if (!vdev->vm_running) { |
95477323 MT |
1098 | return 0; |
1099 | } | |
cdd5cc12 | 1100 | |
fed699f9 JW |
1101 | if (nc->queue_index >= n->curr_queues) { |
1102 | return 0; | |
1103 | } | |
1104 | ||
0c87e93e | 1105 | if (!virtio_queue_ready(q->rx_vq) || |
17a0ca55 | 1106 | !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 1107 | return 0; |
0c87e93e | 1108 | } |
fbe78f4f | 1109 | |
cdd5cc12 MM |
1110 | return 1; |
1111 | } | |
1112 | ||
0c87e93e | 1113 | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
cdd5cc12 | 1114 | { |
0c87e93e JW |
1115 | VirtIONet *n = q->n; |
1116 | if (virtio_queue_empty(q->rx_vq) || | |
fbe78f4f | 1117 | (n->mergeable_rx_bufs && |
0c87e93e JW |
1118 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
1119 | virtio_queue_set_notification(q->rx_vq, 1); | |
06b12970 TL |
1120 | |
1121 | /* To avoid a race condition where the guest has made some buffers | |
1122 | * available after the above check but before notification was | |
1123 | * enabled, check for available buffers again. | |
1124 | */ | |
0c87e93e | 1125 | if (virtio_queue_empty(q->rx_vq) || |
06b12970 | 1126 | (n->mergeable_rx_bufs && |
0c87e93e | 1127 | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { |
06b12970 | 1128 | return 0; |
0c87e93e | 1129 | } |
fbe78f4f AL |
1130 | } |
1131 | ||
0c87e93e | 1132 | virtio_queue_set_notification(q->rx_vq, 0); |
fbe78f4f AL |
1133 | return 1; |
1134 | } | |
1135 | ||
1399c60d | 1136 | static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) |
032a74a1 | 1137 | { |
1399c60d RR |
1138 | virtio_tswap16s(vdev, &hdr->hdr_len); |
1139 | virtio_tswap16s(vdev, &hdr->gso_size); | |
1140 | virtio_tswap16s(vdev, &hdr->csum_start); | |
1141 | virtio_tswap16s(vdev, &hdr->csum_offset); | |
032a74a1 CLG |
1142 | } |
1143 | ||
1d41b0c1 AL |
1144 | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so |
1145 | * it never finds out that the packets don't have valid checksums. This | |
1146 | * causes dhclient to get upset. Fedora's carried a patch for ages to | |
1147 | * fix this with Xen but it hasn't appeared in an upstream release of | |
1148 | * dhclient yet. | |
1149 | * | |
1150 | * To avoid breaking existing guests, we catch udp packets and add | |
1151 | * checksums. This is terrible but it's better than hacking the guest | |
1152 | * kernels. | |
1153 | * | |
1154 | * N.B. if we introduce a zero-copy API, this operation is no longer free so | |
1155 | * we should provide a mechanism to disable it to avoid polluting the host | |
1156 | * cache. | |
1157 | */ | |
1158 | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, | |
22cc84db | 1159 | uint8_t *buf, size_t size) |
1d41b0c1 AL |
1160 | { |
1161 | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ | |
1162 | (size > 27 && size < 1500) && /* normal sized MTU */ | |
1163 | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ | |
1164 | (buf[23] == 17) && /* ip.protocol == UDP */ | |
1165 | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ | |
22cc84db | 1166 | net_checksum_calculate(buf, size); |
1d41b0c1 AL |
1167 | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
1168 | } | |
1169 | } | |
1170 | ||
280598b7 MT |
1171 | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
1172 | const void *buf, size_t size) | |
fbe78f4f | 1173 | { |
3a330134 | 1174 | if (n->has_vnet_hdr) { |
22cc84db MT |
1175 | /* FIXME this cast is evil */ |
1176 | void *wbuf = (void *)buf; | |
280598b7 MT |
1177 | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
1178 | size - n->host_hdr_len); | |
1bfa316c GK |
1179 | |
1180 | if (n->needs_vnet_hdr_swap) { | |
1181 | virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); | |
1182 | } | |
280598b7 | 1183 | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); |
22cc84db MT |
1184 | } else { |
1185 | struct virtio_net_hdr hdr = { | |
1186 | .flags = 0, | |
1187 | .gso_type = VIRTIO_NET_HDR_GSO_NONE | |
1188 | }; | |
1189 | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); | |
3a330134 | 1190 | } |
fbe78f4f AL |
1191 | } |
1192 | ||
3831ab20 AL |
1193 | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
1194 | { | |
1195 | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; | |
f21c0ed9 | 1196 | static const uint8_t vlan[] = {0x81, 0x00}; |
3831ab20 | 1197 | uint8_t *ptr = (uint8_t *)buf; |
b6503ed9 | 1198 | int i; |
3831ab20 AL |
1199 | |
1200 | if (n->promisc) | |
1201 | return 1; | |
1202 | ||
e043ebc6 | 1203 | ptr += n->host_hdr_len; |
3a330134 | 1204 | |
f21c0ed9 | 1205 | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
7542d3e7 | 1206 | int vid = lduw_be_p(ptr + 14) & 0xfff; |
f21c0ed9 AL |
1207 | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
1208 | return 0; | |
1209 | } | |
1210 | ||
bbe2f399 AW |
1211 | if (ptr[0] & 1) { // multicast |
1212 | if (!memcmp(ptr, bcast, sizeof(bcast))) { | |
015cb166 AW |
1213 | return !n->nobcast; |
1214 | } else if (n->nomulti) { | |
1215 | return 0; | |
8fd2a2f1 | 1216 | } else if (n->allmulti || n->mac_table.multi_overflow) { |
bbe2f399 AW |
1217 | return 1; |
1218 | } | |
2d9aba39 AW |
1219 | |
1220 | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { | |
1221 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
1222 | return 1; | |
1223 | } | |
1224 | } | |
bbe2f399 | 1225 | } else { // unicast |
015cb166 AW |
1226 | if (n->nouni) { |
1227 | return 0; | |
1228 | } else if (n->alluni || n->mac_table.uni_overflow) { | |
8fd2a2f1 AW |
1229 | return 1; |
1230 | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { | |
bbe2f399 AW |
1231 | return 1; |
1232 | } | |
3831ab20 | 1233 | |
2d9aba39 AW |
1234 | for (i = 0; i < n->mac_table.first_multi; i++) { |
1235 | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { | |
1236 | return 1; | |
1237 | } | |
1238 | } | |
b6503ed9 AL |
1239 | } |
1240 | ||
3831ab20 AL |
1241 | return 0; |
1242 | } | |
1243 | ||
97cd965c PB |
1244 | static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf, |
1245 | size_t size) | |
fbe78f4f | 1246 | { |
cc1f0f45 | 1247 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1248 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1249 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
63c58728 MT |
1250 | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; |
1251 | struct virtio_net_hdr_mrg_rxbuf mhdr; | |
1252 | unsigned mhdr_cnt = 0; | |
22cc84db | 1253 | size_t offset, i, guest_offset; |
fbe78f4f | 1254 | |
fed699f9 | 1255 | if (!virtio_net_can_receive(nc)) { |
cdd5cc12 | 1256 | return -1; |
b356f76d | 1257 | } |
cdd5cc12 | 1258 | |
940cda94 | 1259 | /* hdr_len refers to the header we supply to the guest */ |
0c87e93e | 1260 | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { |
8aeff62d | 1261 | return 0; |
0c87e93e | 1262 | } |
fbe78f4f | 1263 | |
3831ab20 | 1264 | if (!receive_filter(n, buf, size)) |
4f1c942b | 1265 | return size; |
3831ab20 | 1266 | |
fbe78f4f AL |
1267 | offset = i = 0; |
1268 | ||
1269 | while (offset < size) { | |
51b19ebe | 1270 | VirtQueueElement *elem; |
fbe78f4f | 1271 | int len, total; |
51b19ebe | 1272 | const struct iovec *sg; |
fbe78f4f | 1273 | |
22c253d9 | 1274 | total = 0; |
fbe78f4f | 1275 | |
51b19ebe PB |
1276 | elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement)); |
1277 | if (!elem) { | |
ba10b9c0 GK |
1278 | if (i) { |
1279 | virtio_error(vdev, "virtio-net unexpected empty queue: " | |
1280 | "i %zd mergeable %d offset %zd, size %zd, " | |
1281 | "guest hdr len %zd, host hdr len %zd " | |
1282 | "guest features 0x%" PRIx64, | |
1283 | i, n->mergeable_rx_bufs, offset, size, | |
1284 | n->guest_hdr_len, n->host_hdr_len, | |
1285 | vdev->guest_features); | |
1286 | } | |
1287 | return -1; | |
fbe78f4f AL |
1288 | } |
1289 | ||
51b19ebe | 1290 | if (elem->in_num < 1) { |
ba10b9c0 GK |
1291 | virtio_error(vdev, |
1292 | "virtio-net receive queue contains no in buffers"); | |
1293 | virtqueue_detach_element(q->rx_vq, elem, 0); | |
1294 | g_free(elem); | |
1295 | return -1; | |
fbe78f4f AL |
1296 | } |
1297 | ||
51b19ebe | 1298 | sg = elem->in_sg; |
fbe78f4f | 1299 | if (i == 0) { |
c8d28e7e | 1300 | assert(offset == 0); |
63c58728 MT |
1301 | if (n->mergeable_rx_bufs) { |
1302 | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), | |
51b19ebe | 1303 | sg, elem->in_num, |
63c58728 MT |
1304 | offsetof(typeof(mhdr), num_buffers), |
1305 | sizeof(mhdr.num_buffers)); | |
1306 | } | |
fbe78f4f | 1307 | |
51b19ebe | 1308 | receive_header(n, sg, elem->in_num, buf, size); |
c8d28e7e | 1309 | offset = n->host_hdr_len; |
e35e23f6 | 1310 | total += n->guest_hdr_len; |
22cc84db MT |
1311 | guest_offset = n->guest_hdr_len; |
1312 | } else { | |
1313 | guest_offset = 0; | |
fbe78f4f AL |
1314 | } |
1315 | ||
1316 | /* copy in packet. ugh */ | |
51b19ebe | 1317 | len = iov_from_buf(sg, elem->in_num, guest_offset, |
dcf6f5e1 | 1318 | buf + offset, size - offset); |
fbe78f4f | 1319 | total += len; |
279a4253 MT |
1320 | offset += len; |
1321 | /* If buffers can't be merged, at this point we | |
1322 | * must have consumed the complete packet. | |
1323 | * Otherwise, drop it. */ | |
1324 | if (!n->mergeable_rx_bufs && offset < size) { | |
27e57efe | 1325 | virtqueue_unpop(q->rx_vq, elem, total); |
51b19ebe | 1326 | g_free(elem); |
279a4253 MT |
1327 | return size; |
1328 | } | |
fbe78f4f AL |
1329 | |
1330 | /* signal other side */ | |
51b19ebe PB |
1331 | virtqueue_fill(q->rx_vq, elem, total, i++); |
1332 | g_free(elem); | |
fbe78f4f AL |
1333 | } |
1334 | ||
63c58728 | 1335 | if (mhdr_cnt) { |
1399c60d | 1336 | virtio_stw_p(vdev, &mhdr.num_buffers, i); |
63c58728 MT |
1337 | iov_from_buf(mhdr_sg, mhdr_cnt, |
1338 | 0, | |
1339 | &mhdr.num_buffers, sizeof mhdr.num_buffers); | |
44b15bc5 | 1340 | } |
fbe78f4f | 1341 | |
0c87e93e | 1342 | virtqueue_flush(q->rx_vq, i); |
17a0ca55 | 1343 | virtio_notify(vdev, q->rx_vq); |
4f1c942b MM |
1344 | |
1345 | return size; | |
fbe78f4f AL |
1346 | } |
1347 | ||
2974e916 | 1348 | static ssize_t virtio_net_do_receive(NetClientState *nc, const uint8_t *buf, |
97cd965c PB |
1349 | size_t size) |
1350 | { | |
1351 | ssize_t r; | |
1352 | ||
1353 | rcu_read_lock(); | |
1354 | r = virtio_net_receive_rcu(nc, buf, size); | |
1355 | rcu_read_unlock(); | |
1356 | return r; | |
1357 | } | |
1358 | ||
2974e916 YB |
1359 | static void virtio_net_rsc_extract_unit4(VirtioNetRscChain *chain, |
1360 | const uint8_t *buf, | |
1361 | VirtioNetRscUnit *unit) | |
1362 | { | |
1363 | uint16_t ip_hdrlen; | |
1364 | struct ip_header *ip; | |
1365 | ||
1366 | ip = (struct ip_header *)(buf + chain->n->guest_hdr_len | |
1367 | + sizeof(struct eth_header)); | |
1368 | unit->ip = (void *)ip; | |
1369 | ip_hdrlen = (ip->ip_ver_len & 0xF) << 2; | |
1370 | unit->ip_plen = &ip->ip_len; | |
1371 | unit->tcp = (struct tcp_header *)(((uint8_t *)unit->ip) + ip_hdrlen); | |
1372 | unit->tcp_hdrlen = (htons(unit->tcp->th_offset_flags) & 0xF000) >> 10; | |
1373 | unit->payload = htons(*unit->ip_plen) - ip_hdrlen - unit->tcp_hdrlen; | |
1374 | } | |
1375 | ||
1376 | static void virtio_net_rsc_extract_unit6(VirtioNetRscChain *chain, | |
1377 | const uint8_t *buf, | |
1378 | VirtioNetRscUnit *unit) | |
1379 | { | |
1380 | struct ip6_header *ip6; | |
1381 | ||
1382 | ip6 = (struct ip6_header *)(buf + chain->n->guest_hdr_len | |
1383 | + sizeof(struct eth_header)); | |
1384 | unit->ip = ip6; | |
1385 | unit->ip_plen = &(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen); | |
1386 | unit->tcp = (struct tcp_header *)(((uint8_t *)unit->ip)\ | |
1387 | + sizeof(struct ip6_header)); | |
1388 | unit->tcp_hdrlen = (htons(unit->tcp->th_offset_flags) & 0xF000) >> 10; | |
1389 | ||
1390 | /* There is a difference between payload lenght in ipv4 and v6, | |
1391 | ip header is excluded in ipv6 */ | |
1392 | unit->payload = htons(*unit->ip_plen) - unit->tcp_hdrlen; | |
1393 | } | |
1394 | ||
1395 | static size_t virtio_net_rsc_drain_seg(VirtioNetRscChain *chain, | |
1396 | VirtioNetRscSeg *seg) | |
1397 | { | |
1398 | int ret; | |
1399 | struct virtio_net_hdr *h; | |
1400 | ||
1401 | h = (struct virtio_net_hdr *)seg->buf; | |
1402 | h->flags = 0; | |
1403 | h->gso_type = VIRTIO_NET_HDR_GSO_NONE; | |
1404 | ||
1405 | if (seg->is_coalesced) { | |
1406 | *virtio_net_rsc_ext_num_packets(h) = seg->packets; | |
1407 | *virtio_net_rsc_ext_num_dupacks(h) = seg->dup_ack; | |
1408 | h->flags = VIRTIO_NET_HDR_F_RSC_INFO; | |
1409 | if (chain->proto == ETH_P_IP) { | |
1410 | h->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; | |
1411 | } else { | |
1412 | h->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | ret = virtio_net_do_receive(seg->nc, seg->buf, seg->size); | |
1417 | QTAILQ_REMOVE(&chain->buffers, seg, next); | |
1418 | g_free(seg->buf); | |
1419 | g_free(seg); | |
1420 | ||
1421 | return ret; | |
1422 | } | |
1423 | ||
1424 | static void virtio_net_rsc_purge(void *opq) | |
1425 | { | |
1426 | VirtioNetRscSeg *seg, *rn; | |
1427 | VirtioNetRscChain *chain = (VirtioNetRscChain *)opq; | |
1428 | ||
1429 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn) { | |
1430 | if (virtio_net_rsc_drain_seg(chain, seg) == 0) { | |
1431 | chain->stat.purge_failed++; | |
1432 | continue; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | chain->stat.timer++; | |
1437 | if (!QTAILQ_EMPTY(&chain->buffers)) { | |
1438 | timer_mod(chain->drain_timer, | |
1439 | qemu_clock_get_ns(QEMU_CLOCK_HOST) + chain->n->rsc_timeout); | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | static void virtio_net_rsc_cleanup(VirtIONet *n) | |
1444 | { | |
1445 | VirtioNetRscChain *chain, *rn_chain; | |
1446 | VirtioNetRscSeg *seg, *rn_seg; | |
1447 | ||
1448 | QTAILQ_FOREACH_SAFE(chain, &n->rsc_chains, next, rn_chain) { | |
1449 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn_seg) { | |
1450 | QTAILQ_REMOVE(&chain->buffers, seg, next); | |
1451 | g_free(seg->buf); | |
1452 | g_free(seg); | |
1453 | } | |
1454 | ||
1455 | timer_del(chain->drain_timer); | |
1456 | timer_free(chain->drain_timer); | |
1457 | QTAILQ_REMOVE(&n->rsc_chains, chain, next); | |
1458 | g_free(chain); | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | static void virtio_net_rsc_cache_buf(VirtioNetRscChain *chain, | |
1463 | NetClientState *nc, | |
1464 | const uint8_t *buf, size_t size) | |
1465 | { | |
1466 | uint16_t hdr_len; | |
1467 | VirtioNetRscSeg *seg; | |
1468 | ||
1469 | hdr_len = chain->n->guest_hdr_len; | |
1470 | seg = g_malloc(sizeof(VirtioNetRscSeg)); | |
1471 | seg->buf = g_malloc(hdr_len + sizeof(struct eth_header) | |
1472 | + sizeof(struct ip6_header) + VIRTIO_NET_MAX_TCP_PAYLOAD); | |
1473 | memcpy(seg->buf, buf, size); | |
1474 | seg->size = size; | |
1475 | seg->packets = 1; | |
1476 | seg->dup_ack = 0; | |
1477 | seg->is_coalesced = 0; | |
1478 | seg->nc = nc; | |
1479 | ||
1480 | QTAILQ_INSERT_TAIL(&chain->buffers, seg, next); | |
1481 | chain->stat.cache++; | |
1482 | ||
1483 | switch (chain->proto) { | |
1484 | case ETH_P_IP: | |
1485 | virtio_net_rsc_extract_unit4(chain, seg->buf, &seg->unit); | |
1486 | break; | |
1487 | case ETH_P_IPV6: | |
1488 | virtio_net_rsc_extract_unit6(chain, seg->buf, &seg->unit); | |
1489 | break; | |
1490 | default: | |
1491 | g_assert_not_reached(); | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | static int32_t virtio_net_rsc_handle_ack(VirtioNetRscChain *chain, | |
1496 | VirtioNetRscSeg *seg, | |
1497 | const uint8_t *buf, | |
1498 | struct tcp_header *n_tcp, | |
1499 | struct tcp_header *o_tcp) | |
1500 | { | |
1501 | uint32_t nack, oack; | |
1502 | uint16_t nwin, owin; | |
1503 | ||
1504 | nack = htonl(n_tcp->th_ack); | |
1505 | nwin = htons(n_tcp->th_win); | |
1506 | oack = htonl(o_tcp->th_ack); | |
1507 | owin = htons(o_tcp->th_win); | |
1508 | ||
1509 | if ((nack - oack) >= VIRTIO_NET_MAX_TCP_PAYLOAD) { | |
1510 | chain->stat.ack_out_of_win++; | |
1511 | return RSC_FINAL; | |
1512 | } else if (nack == oack) { | |
1513 | /* duplicated ack or window probe */ | |
1514 | if (nwin == owin) { | |
1515 | /* duplicated ack, add dup ack count due to whql test up to 1 */ | |
1516 | chain->stat.dup_ack++; | |
1517 | return RSC_FINAL; | |
1518 | } else { | |
1519 | /* Coalesce window update */ | |
1520 | o_tcp->th_win = n_tcp->th_win; | |
1521 | chain->stat.win_update++; | |
1522 | return RSC_COALESCE; | |
1523 | } | |
1524 | } else { | |
1525 | /* pure ack, go to 'C', finalize*/ | |
1526 | chain->stat.pure_ack++; | |
1527 | return RSC_FINAL; | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | static int32_t virtio_net_rsc_coalesce_data(VirtioNetRscChain *chain, | |
1532 | VirtioNetRscSeg *seg, | |
1533 | const uint8_t *buf, | |
1534 | VirtioNetRscUnit *n_unit) | |
1535 | { | |
1536 | void *data; | |
1537 | uint16_t o_ip_len; | |
1538 | uint32_t nseq, oseq; | |
1539 | VirtioNetRscUnit *o_unit; | |
1540 | ||
1541 | o_unit = &seg->unit; | |
1542 | o_ip_len = htons(*o_unit->ip_plen); | |
1543 | nseq = htonl(n_unit->tcp->th_seq); | |
1544 | oseq = htonl(o_unit->tcp->th_seq); | |
1545 | ||
1546 | /* out of order or retransmitted. */ | |
1547 | if ((nseq - oseq) > VIRTIO_NET_MAX_TCP_PAYLOAD) { | |
1548 | chain->stat.data_out_of_win++; | |
1549 | return RSC_FINAL; | |
1550 | } | |
1551 | ||
1552 | data = ((uint8_t *)n_unit->tcp) + n_unit->tcp_hdrlen; | |
1553 | if (nseq == oseq) { | |
1554 | if ((o_unit->payload == 0) && n_unit->payload) { | |
1555 | /* From no payload to payload, normal case, not a dup ack or etc */ | |
1556 | chain->stat.data_after_pure_ack++; | |
1557 | goto coalesce; | |
1558 | } else { | |
1559 | return virtio_net_rsc_handle_ack(chain, seg, buf, | |
1560 | n_unit->tcp, o_unit->tcp); | |
1561 | } | |
1562 | } else if ((nseq - oseq) != o_unit->payload) { | |
1563 | /* Not a consistent packet, out of order */ | |
1564 | chain->stat.data_out_of_order++; | |
1565 | return RSC_FINAL; | |
1566 | } else { | |
1567 | coalesce: | |
1568 | if ((o_ip_len + n_unit->payload) > chain->max_payload) { | |
1569 | chain->stat.over_size++; | |
1570 | return RSC_FINAL; | |
1571 | } | |
1572 | ||
1573 | /* Here comes the right data, the payload length in v4/v6 is different, | |
1574 | so use the field value to update and record the new data len */ | |
1575 | o_unit->payload += n_unit->payload; /* update new data len */ | |
1576 | ||
1577 | /* update field in ip header */ | |
1578 | *o_unit->ip_plen = htons(o_ip_len + n_unit->payload); | |
1579 | ||
1580 | /* Bring 'PUSH' big, the whql test guide says 'PUSH' can be coalesced | |
1581 | for windows guest, while this may change the behavior for linux | |
1582 | guest (only if it uses RSC feature). */ | |
1583 | o_unit->tcp->th_offset_flags = n_unit->tcp->th_offset_flags; | |
1584 | ||
1585 | o_unit->tcp->th_ack = n_unit->tcp->th_ack; | |
1586 | o_unit->tcp->th_win = n_unit->tcp->th_win; | |
1587 | ||
1588 | memmove(seg->buf + seg->size, data, n_unit->payload); | |
1589 | seg->size += n_unit->payload; | |
1590 | seg->packets++; | |
1591 | chain->stat.coalesced++; | |
1592 | return RSC_COALESCE; | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | static int32_t virtio_net_rsc_coalesce4(VirtioNetRscChain *chain, | |
1597 | VirtioNetRscSeg *seg, | |
1598 | const uint8_t *buf, size_t size, | |
1599 | VirtioNetRscUnit *unit) | |
1600 | { | |
1601 | struct ip_header *ip1, *ip2; | |
1602 | ||
1603 | ip1 = (struct ip_header *)(unit->ip); | |
1604 | ip2 = (struct ip_header *)(seg->unit.ip); | |
1605 | if ((ip1->ip_src ^ ip2->ip_src) || (ip1->ip_dst ^ ip2->ip_dst) | |
1606 | || (unit->tcp->th_sport ^ seg->unit.tcp->th_sport) | |
1607 | || (unit->tcp->th_dport ^ seg->unit.tcp->th_dport)) { | |
1608 | chain->stat.no_match++; | |
1609 | return RSC_NO_MATCH; | |
1610 | } | |
1611 | ||
1612 | return virtio_net_rsc_coalesce_data(chain, seg, buf, unit); | |
1613 | } | |
1614 | ||
1615 | static int32_t virtio_net_rsc_coalesce6(VirtioNetRscChain *chain, | |
1616 | VirtioNetRscSeg *seg, | |
1617 | const uint8_t *buf, size_t size, | |
1618 | VirtioNetRscUnit *unit) | |
1619 | { | |
1620 | struct ip6_header *ip1, *ip2; | |
1621 | ||
1622 | ip1 = (struct ip6_header *)(unit->ip); | |
1623 | ip2 = (struct ip6_header *)(seg->unit.ip); | |
1624 | if (memcmp(&ip1->ip6_src, &ip2->ip6_src, sizeof(struct in6_address)) | |
1625 | || memcmp(&ip1->ip6_dst, &ip2->ip6_dst, sizeof(struct in6_address)) | |
1626 | || (unit->tcp->th_sport ^ seg->unit.tcp->th_sport) | |
1627 | || (unit->tcp->th_dport ^ seg->unit.tcp->th_dport)) { | |
1628 | chain->stat.no_match++; | |
1629 | return RSC_NO_MATCH; | |
1630 | } | |
1631 | ||
1632 | return virtio_net_rsc_coalesce_data(chain, seg, buf, unit); | |
1633 | } | |
1634 | ||
1635 | /* Packets with 'SYN' should bypass, other flag should be sent after drain | |
1636 | * to prevent out of order */ | |
1637 | static int virtio_net_rsc_tcp_ctrl_check(VirtioNetRscChain *chain, | |
1638 | struct tcp_header *tcp) | |
1639 | { | |
1640 | uint16_t tcp_hdr; | |
1641 | uint16_t tcp_flag; | |
1642 | ||
1643 | tcp_flag = htons(tcp->th_offset_flags); | |
1644 | tcp_hdr = (tcp_flag & VIRTIO_NET_TCP_HDR_LENGTH) >> 10; | |
1645 | tcp_flag &= VIRTIO_NET_TCP_FLAG; | |
1646 | tcp_flag = htons(tcp->th_offset_flags) & 0x3F; | |
1647 | if (tcp_flag & TH_SYN) { | |
1648 | chain->stat.tcp_syn++; | |
1649 | return RSC_BYPASS; | |
1650 | } | |
1651 | ||
1652 | if (tcp_flag & (TH_FIN | TH_URG | TH_RST | TH_ECE | TH_CWR)) { | |
1653 | chain->stat.tcp_ctrl_drain++; | |
1654 | return RSC_FINAL; | |
1655 | } | |
1656 | ||
1657 | if (tcp_hdr > sizeof(struct tcp_header)) { | |
1658 | chain->stat.tcp_all_opt++; | |
1659 | return RSC_FINAL; | |
1660 | } | |
1661 | ||
1662 | return RSC_CANDIDATE; | |
1663 | } | |
1664 | ||
1665 | static size_t virtio_net_rsc_do_coalesce(VirtioNetRscChain *chain, | |
1666 | NetClientState *nc, | |
1667 | const uint8_t *buf, size_t size, | |
1668 | VirtioNetRscUnit *unit) | |
1669 | { | |
1670 | int ret; | |
1671 | VirtioNetRscSeg *seg, *nseg; | |
1672 | ||
1673 | if (QTAILQ_EMPTY(&chain->buffers)) { | |
1674 | chain->stat.empty_cache++; | |
1675 | virtio_net_rsc_cache_buf(chain, nc, buf, size); | |
1676 | timer_mod(chain->drain_timer, | |
1677 | qemu_clock_get_ns(QEMU_CLOCK_HOST) + chain->n->rsc_timeout); | |
1678 | return size; | |
1679 | } | |
1680 | ||
1681 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, nseg) { | |
1682 | if (chain->proto == ETH_P_IP) { | |
1683 | ret = virtio_net_rsc_coalesce4(chain, seg, buf, size, unit); | |
1684 | } else { | |
1685 | ret = virtio_net_rsc_coalesce6(chain, seg, buf, size, unit); | |
1686 | } | |
1687 | ||
1688 | if (ret == RSC_FINAL) { | |
1689 | if (virtio_net_rsc_drain_seg(chain, seg) == 0) { | |
1690 | /* Send failed */ | |
1691 | chain->stat.final_failed++; | |
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | /* Send current packet */ | |
1696 | return virtio_net_do_receive(nc, buf, size); | |
1697 | } else if (ret == RSC_NO_MATCH) { | |
1698 | continue; | |
1699 | } else { | |
1700 | /* Coalesced, mark coalesced flag to tell calc cksum for ipv4 */ | |
1701 | seg->is_coalesced = 1; | |
1702 | return size; | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | chain->stat.no_match_cache++; | |
1707 | virtio_net_rsc_cache_buf(chain, nc, buf, size); | |
1708 | return size; | |
1709 | } | |
1710 | ||
1711 | /* Drain a connection data, this is to avoid out of order segments */ | |
1712 | static size_t virtio_net_rsc_drain_flow(VirtioNetRscChain *chain, | |
1713 | NetClientState *nc, | |
1714 | const uint8_t *buf, size_t size, | |
1715 | uint16_t ip_start, uint16_t ip_size, | |
1716 | uint16_t tcp_port) | |
1717 | { | |
1718 | VirtioNetRscSeg *seg, *nseg; | |
1719 | uint32_t ppair1, ppair2; | |
1720 | ||
1721 | ppair1 = *(uint32_t *)(buf + tcp_port); | |
1722 | QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, nseg) { | |
1723 | ppair2 = *(uint32_t *)(seg->buf + tcp_port); | |
1724 | if (memcmp(buf + ip_start, seg->buf + ip_start, ip_size) | |
1725 | || (ppair1 != ppair2)) { | |
1726 | continue; | |
1727 | } | |
1728 | if (virtio_net_rsc_drain_seg(chain, seg) == 0) { | |
1729 | chain->stat.drain_failed++; | |
1730 | } | |
1731 | ||
1732 | break; | |
1733 | } | |
1734 | ||
1735 | return virtio_net_do_receive(nc, buf, size); | |
1736 | } | |
1737 | ||
1738 | static int32_t virtio_net_rsc_sanity_check4(VirtioNetRscChain *chain, | |
1739 | struct ip_header *ip, | |
1740 | const uint8_t *buf, size_t size) | |
1741 | { | |
1742 | uint16_t ip_len; | |
1743 | ||
1744 | /* Not an ipv4 packet */ | |
1745 | if (((ip->ip_ver_len & 0xF0) >> 4) != IP_HEADER_VERSION_4) { | |
1746 | chain->stat.ip_option++; | |
1747 | return RSC_BYPASS; | |
1748 | } | |
1749 | ||
1750 | /* Don't handle packets with ip option */ | |
1751 | if ((ip->ip_ver_len & 0xF) != VIRTIO_NET_IP4_HEADER_LENGTH) { | |
1752 | chain->stat.ip_option++; | |
1753 | return RSC_BYPASS; | |
1754 | } | |
1755 | ||
1756 | if (ip->ip_p != IPPROTO_TCP) { | |
1757 | chain->stat.bypass_not_tcp++; | |
1758 | return RSC_BYPASS; | |
1759 | } | |
1760 | ||
1761 | /* Don't handle packets with ip fragment */ | |
1762 | if (!(htons(ip->ip_off) & IP_DF)) { | |
1763 | chain->stat.ip_frag++; | |
1764 | return RSC_BYPASS; | |
1765 | } | |
1766 | ||
1767 | /* Don't handle packets with ecn flag */ | |
1768 | if (IPTOS_ECN(ip->ip_tos)) { | |
1769 | chain->stat.ip_ecn++; | |
1770 | return RSC_BYPASS; | |
1771 | } | |
1772 | ||
1773 | ip_len = htons(ip->ip_len); | |
1774 | if (ip_len < (sizeof(struct ip_header) + sizeof(struct tcp_header)) | |
1775 | || ip_len > (size - chain->n->guest_hdr_len - | |
1776 | sizeof(struct eth_header))) { | |
1777 | chain->stat.ip_hacked++; | |
1778 | return RSC_BYPASS; | |
1779 | } | |
1780 | ||
1781 | return RSC_CANDIDATE; | |
1782 | } | |
1783 | ||
1784 | static size_t virtio_net_rsc_receive4(VirtioNetRscChain *chain, | |
1785 | NetClientState *nc, | |
1786 | const uint8_t *buf, size_t size) | |
1787 | { | |
1788 | int32_t ret; | |
1789 | uint16_t hdr_len; | |
1790 | VirtioNetRscUnit unit; | |
1791 | ||
1792 | hdr_len = ((VirtIONet *)(chain->n))->guest_hdr_len; | |
1793 | ||
1794 | if (size < (hdr_len + sizeof(struct eth_header) + sizeof(struct ip_header) | |
1795 | + sizeof(struct tcp_header))) { | |
1796 | chain->stat.bypass_not_tcp++; | |
1797 | return virtio_net_do_receive(nc, buf, size); | |
1798 | } | |
1799 | ||
1800 | virtio_net_rsc_extract_unit4(chain, buf, &unit); | |
1801 | if (virtio_net_rsc_sanity_check4(chain, unit.ip, buf, size) | |
1802 | != RSC_CANDIDATE) { | |
1803 | return virtio_net_do_receive(nc, buf, size); | |
1804 | } | |
1805 | ||
1806 | ret = virtio_net_rsc_tcp_ctrl_check(chain, unit.tcp); | |
1807 | if (ret == RSC_BYPASS) { | |
1808 | return virtio_net_do_receive(nc, buf, size); | |
1809 | } else if (ret == RSC_FINAL) { | |
1810 | return virtio_net_rsc_drain_flow(chain, nc, buf, size, | |
1811 | ((hdr_len + sizeof(struct eth_header)) + 12), | |
1812 | VIRTIO_NET_IP4_ADDR_SIZE, | |
1813 | hdr_len + sizeof(struct eth_header) + sizeof(struct ip_header)); | |
1814 | } | |
1815 | ||
1816 | return virtio_net_rsc_do_coalesce(chain, nc, buf, size, &unit); | |
1817 | } | |
1818 | ||
1819 | static int32_t virtio_net_rsc_sanity_check6(VirtioNetRscChain *chain, | |
1820 | struct ip6_header *ip6, | |
1821 | const uint8_t *buf, size_t size) | |
1822 | { | |
1823 | uint16_t ip_len; | |
1824 | ||
1825 | if (((ip6->ip6_ctlun.ip6_un1.ip6_un1_flow & 0xF0) >> 4) | |
1826 | != IP_HEADER_VERSION_6) { | |
1827 | return RSC_BYPASS; | |
1828 | } | |
1829 | ||
1830 | /* Both option and protocol is checked in this */ | |
1831 | if (ip6->ip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_TCP) { | |
1832 | chain->stat.bypass_not_tcp++; | |
1833 | return RSC_BYPASS; | |
1834 | } | |
1835 | ||
1836 | ip_len = htons(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen); | |
1837 | if (ip_len < sizeof(struct tcp_header) || | |
1838 | ip_len > (size - chain->n->guest_hdr_len - sizeof(struct eth_header) | |
1839 | - sizeof(struct ip6_header))) { | |
1840 | chain->stat.ip_hacked++; | |
1841 | return RSC_BYPASS; | |
1842 | } | |
1843 | ||
1844 | /* Don't handle packets with ecn flag */ | |
1845 | if (IP6_ECN(ip6->ip6_ctlun.ip6_un3.ip6_un3_ecn)) { | |
1846 | chain->stat.ip_ecn++; | |
1847 | return RSC_BYPASS; | |
1848 | } | |
1849 | ||
1850 | return RSC_CANDIDATE; | |
1851 | } | |
1852 | ||
1853 | static size_t virtio_net_rsc_receive6(void *opq, NetClientState *nc, | |
1854 | const uint8_t *buf, size_t size) | |
1855 | { | |
1856 | int32_t ret; | |
1857 | uint16_t hdr_len; | |
1858 | VirtioNetRscChain *chain; | |
1859 | VirtioNetRscUnit unit; | |
1860 | ||
1861 | chain = (VirtioNetRscChain *)opq; | |
1862 | hdr_len = ((VirtIONet *)(chain->n))->guest_hdr_len; | |
1863 | ||
1864 | if (size < (hdr_len + sizeof(struct eth_header) + sizeof(struct ip6_header) | |
1865 | + sizeof(tcp_header))) { | |
1866 | return virtio_net_do_receive(nc, buf, size); | |
1867 | } | |
1868 | ||
1869 | virtio_net_rsc_extract_unit6(chain, buf, &unit); | |
1870 | if (RSC_CANDIDATE != virtio_net_rsc_sanity_check6(chain, | |
1871 | unit.ip, buf, size)) { | |
1872 | return virtio_net_do_receive(nc, buf, size); | |
1873 | } | |
1874 | ||
1875 | ret = virtio_net_rsc_tcp_ctrl_check(chain, unit.tcp); | |
1876 | if (ret == RSC_BYPASS) { | |
1877 | return virtio_net_do_receive(nc, buf, size); | |
1878 | } else if (ret == RSC_FINAL) { | |
1879 | return virtio_net_rsc_drain_flow(chain, nc, buf, size, | |
1880 | ((hdr_len + sizeof(struct eth_header)) + 8), | |
1881 | VIRTIO_NET_IP6_ADDR_SIZE, | |
1882 | hdr_len + sizeof(struct eth_header) | |
1883 | + sizeof(struct ip6_header)); | |
1884 | } | |
1885 | ||
1886 | return virtio_net_rsc_do_coalesce(chain, nc, buf, size, &unit); | |
1887 | } | |
1888 | ||
1889 | static VirtioNetRscChain *virtio_net_rsc_lookup_chain(VirtIONet *n, | |
1890 | NetClientState *nc, | |
1891 | uint16_t proto) | |
1892 | { | |
1893 | VirtioNetRscChain *chain; | |
1894 | ||
1895 | if ((proto != (uint16_t)ETH_P_IP) && (proto != (uint16_t)ETH_P_IPV6)) { | |
1896 | return NULL; | |
1897 | } | |
1898 | ||
1899 | QTAILQ_FOREACH(chain, &n->rsc_chains, next) { | |
1900 | if (chain->proto == proto) { | |
1901 | return chain; | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | chain = g_malloc(sizeof(*chain)); | |
1906 | chain->n = n; | |
1907 | chain->proto = proto; | |
1908 | if (proto == (uint16_t)ETH_P_IP) { | |
1909 | chain->max_payload = VIRTIO_NET_MAX_IP4_PAYLOAD; | |
1910 | chain->gso_type = VIRTIO_NET_HDR_GSO_TCPV4; | |
1911 | } else { | |
1912 | chain->max_payload = VIRTIO_NET_MAX_IP6_PAYLOAD; | |
1913 | chain->gso_type = VIRTIO_NET_HDR_GSO_TCPV6; | |
1914 | } | |
1915 | chain->drain_timer = timer_new_ns(QEMU_CLOCK_HOST, | |
1916 | virtio_net_rsc_purge, chain); | |
1917 | memset(&chain->stat, 0, sizeof(chain->stat)); | |
1918 | ||
1919 | QTAILQ_INIT(&chain->buffers); | |
1920 | QTAILQ_INSERT_TAIL(&n->rsc_chains, chain, next); | |
1921 | ||
1922 | return chain; | |
1923 | } | |
1924 | ||
1925 | static ssize_t virtio_net_rsc_receive(NetClientState *nc, | |
1926 | const uint8_t *buf, | |
1927 | size_t size) | |
1928 | { | |
1929 | uint16_t proto; | |
1930 | VirtioNetRscChain *chain; | |
1931 | struct eth_header *eth; | |
1932 | VirtIONet *n; | |
1933 | ||
1934 | n = qemu_get_nic_opaque(nc); | |
1935 | if (size < (n->host_hdr_len + sizeof(struct eth_header))) { | |
1936 | return virtio_net_do_receive(nc, buf, size); | |
1937 | } | |
1938 | ||
1939 | eth = (struct eth_header *)(buf + n->guest_hdr_len); | |
1940 | proto = htons(eth->h_proto); | |
1941 | ||
1942 | chain = virtio_net_rsc_lookup_chain(n, nc, proto); | |
1943 | if (chain) { | |
1944 | chain->stat.received++; | |
1945 | if (proto == (uint16_t)ETH_P_IP && n->rsc4_enabled) { | |
1946 | return virtio_net_rsc_receive4(chain, nc, buf, size); | |
1947 | } else if (proto == (uint16_t)ETH_P_IPV6 && n->rsc6_enabled) { | |
1948 | return virtio_net_rsc_receive6(chain, nc, buf, size); | |
1949 | } | |
1950 | } | |
1951 | return virtio_net_do_receive(nc, buf, size); | |
1952 | } | |
1953 | ||
1954 | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, | |
1955 | size_t size) | |
1956 | { | |
1957 | VirtIONet *n = qemu_get_nic_opaque(nc); | |
1958 | if ((n->rsc4_enabled || n->rsc6_enabled)) { | |
1959 | return virtio_net_rsc_receive(nc, buf, size); | |
1960 | } else { | |
1961 | return virtio_net_do_receive(nc, buf, size); | |
1962 | } | |
1963 | } | |
1964 | ||
0c87e93e | 1965 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q); |
6243375f | 1966 | |
4e68f7a0 | 1967 | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
6243375f | 1968 | { |
cc1f0f45 | 1969 | VirtIONet *n = qemu_get_nic_opaque(nc); |
fed699f9 | 1970 | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
17a0ca55 | 1971 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
6243375f | 1972 | |
51b19ebe | 1973 | virtqueue_push(q->tx_vq, q->async_tx.elem, 0); |
17a0ca55 | 1974 | virtio_notify(vdev, q->tx_vq); |
6243375f | 1975 | |
51b19ebe PB |
1976 | g_free(q->async_tx.elem); |
1977 | q->async_tx.elem = NULL; | |
6243375f | 1978 | |
0c87e93e JW |
1979 | virtio_queue_set_notification(q->tx_vq, 1); |
1980 | virtio_net_flush_tx(q); | |
6243375f MM |
1981 | } |
1982 | ||
fbe78f4f | 1983 | /* TX */ |
0c87e93e | 1984 | static int32_t virtio_net_flush_tx(VirtIONetQueue *q) |
fbe78f4f | 1985 | { |
0c87e93e | 1986 | VirtIONet *n = q->n; |
17a0ca55 | 1987 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
51b19ebe | 1988 | VirtQueueElement *elem; |
e3f30488 | 1989 | int32_t num_packets = 0; |
fed699f9 | 1990 | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); |
17a0ca55 | 1991 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
e3f30488 AW |
1992 | return num_packets; |
1993 | } | |
fbe78f4f | 1994 | |
51b19ebe | 1995 | if (q->async_tx.elem) { |
0c87e93e | 1996 | virtio_queue_set_notification(q->tx_vq, 0); |
e3f30488 | 1997 | return num_packets; |
6243375f MM |
1998 | } |
1999 | ||
51b19ebe | 2000 | for (;;) { |
bd89dd98 | 2001 | ssize_t ret; |
51b19ebe PB |
2002 | unsigned int out_num; |
2003 | struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg; | |
feb93f36 | 2004 | struct virtio_net_hdr_mrg_rxbuf mhdr; |
fbe78f4f | 2005 | |
51b19ebe PB |
2006 | elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement)); |
2007 | if (!elem) { | |
2008 | break; | |
2009 | } | |
2010 | ||
2011 | out_num = elem->out_num; | |
2012 | out_sg = elem->out_sg; | |
7b80d08e | 2013 | if (out_num < 1) { |
fa5e56c2 GK |
2014 | virtio_error(vdev, "virtio-net header not in first element"); |
2015 | virtqueue_detach_element(q->tx_vq, elem, 0); | |
2016 | g_free(elem); | |
2017 | return -EINVAL; | |
fbe78f4f AL |
2018 | } |
2019 | ||
032a74a1 | 2020 | if (n->has_vnet_hdr) { |
feb93f36 JW |
2021 | if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < |
2022 | n->guest_hdr_len) { | |
fa5e56c2 GK |
2023 | virtio_error(vdev, "virtio-net header incorrect"); |
2024 | virtqueue_detach_element(q->tx_vq, elem, 0); | |
2025 | g_free(elem); | |
2026 | return -EINVAL; | |
032a74a1 | 2027 | } |
1bfa316c | 2028 | if (n->needs_vnet_hdr_swap) { |
feb93f36 JW |
2029 | virtio_net_hdr_swap(vdev, (void *) &mhdr); |
2030 | sg2[0].iov_base = &mhdr; | |
2031 | sg2[0].iov_len = n->guest_hdr_len; | |
2032 | out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, | |
2033 | out_sg, out_num, | |
2034 | n->guest_hdr_len, -1); | |
2035 | if (out_num == VIRTQUEUE_MAX_SIZE) { | |
2036 | goto drop; | |
7d37435b | 2037 | } |
feb93f36 JW |
2038 | out_num += 1; |
2039 | out_sg = sg2; | |
7d37435b | 2040 | } |
032a74a1 | 2041 | } |
14761f9c MT |
2042 | /* |
2043 | * If host wants to see the guest header as is, we can | |
2044 | * pass it on unchanged. Otherwise, copy just the parts | |
2045 | * that host is interested in. | |
2046 | */ | |
2047 | assert(n->host_hdr_len <= n->guest_hdr_len); | |
2048 | if (n->host_hdr_len != n->guest_hdr_len) { | |
2049 | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), | |
2050 | out_sg, out_num, | |
2051 | 0, n->host_hdr_len); | |
2052 | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, | |
2053 | out_sg, out_num, | |
2054 | n->guest_hdr_len, -1); | |
2055 | out_num = sg_num; | |
2056 | out_sg = sg; | |
fbe78f4f AL |
2057 | } |
2058 | ||
fed699f9 JW |
2059 | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
2060 | out_sg, out_num, virtio_net_tx_complete); | |
6243375f | 2061 | if (ret == 0) { |
0c87e93e JW |
2062 | virtio_queue_set_notification(q->tx_vq, 0); |
2063 | q->async_tx.elem = elem; | |
e3f30488 | 2064 | return -EBUSY; |
6243375f MM |
2065 | } |
2066 | ||
feb93f36 | 2067 | drop: |
51b19ebe | 2068 | virtqueue_push(q->tx_vq, elem, 0); |
17a0ca55 | 2069 | virtio_notify(vdev, q->tx_vq); |
51b19ebe | 2070 | g_free(elem); |
e3f30488 AW |
2071 | |
2072 | if (++num_packets >= n->tx_burst) { | |
2073 | break; | |
2074 | } | |
fbe78f4f | 2075 | } |
e3f30488 | 2076 | return num_packets; |
fbe78f4f AL |
2077 | } |
2078 | ||
a697a334 | 2079 | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
fbe78f4f | 2080 | { |
17a0ca55 | 2081 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2082 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
fbe78f4f | 2083 | |
283e2c2a YB |
2084 | if (unlikely((n->status & VIRTIO_NET_S_LINK_UP) == 0)) { |
2085 | virtio_net_drop_tx_queue_data(vdev, vq); | |
2086 | return; | |
2087 | } | |
2088 | ||
783e7706 | 2089 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 2090 | if (!vdev->vm_running) { |
0c87e93e | 2091 | q->tx_waiting = 1; |
783e7706 MT |
2092 | return; |
2093 | } | |
2094 | ||
0c87e93e | 2095 | if (q->tx_waiting) { |
fbe78f4f | 2096 | virtio_queue_set_notification(vq, 1); |
bc72ad67 | 2097 | timer_del(q->tx_timer); |
0c87e93e | 2098 | q->tx_waiting = 0; |
fa5e56c2 GK |
2099 | if (virtio_net_flush_tx(q) == -EINVAL) { |
2100 | return; | |
2101 | } | |
fbe78f4f | 2102 | } else { |
bc72ad67 AB |
2103 | timer_mod(q->tx_timer, |
2104 | qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); | |
0c87e93e | 2105 | q->tx_waiting = 1; |
fbe78f4f AL |
2106 | virtio_queue_set_notification(vq, 0); |
2107 | } | |
2108 | } | |
2109 | ||
a697a334 AW |
2110 | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
2111 | { | |
17a0ca55 | 2112 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2113 | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
a697a334 | 2114 | |
283e2c2a YB |
2115 | if (unlikely((n->status & VIRTIO_NET_S_LINK_UP) == 0)) { |
2116 | virtio_net_drop_tx_queue_data(vdev, vq); | |
2117 | return; | |
2118 | } | |
2119 | ||
0c87e93e | 2120 | if (unlikely(q->tx_waiting)) { |
a697a334 AW |
2121 | return; |
2122 | } | |
0c87e93e | 2123 | q->tx_waiting = 1; |
783e7706 | 2124 | /* This happens when device was stopped but VCPU wasn't. */ |
17a0ca55 | 2125 | if (!vdev->vm_running) { |
783e7706 MT |
2126 | return; |
2127 | } | |
a697a334 | 2128 | virtio_queue_set_notification(vq, 0); |
0c87e93e | 2129 | qemu_bh_schedule(q->tx_bh); |
a697a334 AW |
2130 | } |
2131 | ||
fbe78f4f AL |
2132 | static void virtio_net_tx_timer(void *opaque) |
2133 | { | |
0c87e93e JW |
2134 | VirtIONetQueue *q = opaque; |
2135 | VirtIONet *n = q->n; | |
17a0ca55 | 2136 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
e8bcf842 MT |
2137 | /* This happens when device was stopped but BH wasn't. */ |
2138 | if (!vdev->vm_running) { | |
2139 | /* Make sure tx waiting is set, so we'll run when restarted. */ | |
2140 | assert(q->tx_waiting); | |
2141 | return; | |
2142 | } | |
fbe78f4f | 2143 | |
0c87e93e | 2144 | q->tx_waiting = 0; |
fbe78f4f AL |
2145 | |
2146 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 2147 | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
fbe78f4f | 2148 | return; |
17a0ca55 | 2149 | } |
fbe78f4f | 2150 | |
0c87e93e JW |
2151 | virtio_queue_set_notification(q->tx_vq, 1); |
2152 | virtio_net_flush_tx(q); | |
fbe78f4f AL |
2153 | } |
2154 | ||
a697a334 AW |
2155 | static void virtio_net_tx_bh(void *opaque) |
2156 | { | |
0c87e93e JW |
2157 | VirtIONetQueue *q = opaque; |
2158 | VirtIONet *n = q->n; | |
17a0ca55 | 2159 | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
a697a334 AW |
2160 | int32_t ret; |
2161 | ||
e8bcf842 MT |
2162 | /* This happens when device was stopped but BH wasn't. */ |
2163 | if (!vdev->vm_running) { | |
2164 | /* Make sure tx waiting is set, so we'll run when restarted. */ | |
2165 | assert(q->tx_waiting); | |
2166 | return; | |
2167 | } | |
783e7706 | 2168 | |
0c87e93e | 2169 | q->tx_waiting = 0; |
a697a334 AW |
2170 | |
2171 | /* Just in case the driver is not ready on more */ | |
17a0ca55 | 2172 | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { |
a697a334 | 2173 | return; |
17a0ca55 | 2174 | } |
a697a334 | 2175 | |
0c87e93e | 2176 | ret = virtio_net_flush_tx(q); |
fa5e56c2 GK |
2177 | if (ret == -EBUSY || ret == -EINVAL) { |
2178 | return; /* Notification re-enable handled by tx_complete or device | |
2179 | * broken */ | |
a697a334 AW |
2180 | } |
2181 | ||
2182 | /* If we flush a full burst of packets, assume there are | |
2183 | * more coming and immediately reschedule */ | |
2184 | if (ret >= n->tx_burst) { | |
0c87e93e JW |
2185 | qemu_bh_schedule(q->tx_bh); |
2186 | q->tx_waiting = 1; | |
a697a334 AW |
2187 | return; |
2188 | } | |
2189 | ||
2190 | /* If less than a full burst, re-enable notification and flush | |
2191 | * anything that may have come in while we weren't looking. If | |
2192 | * we find something, assume the guest is still active and reschedule */ | |
0c87e93e | 2193 | virtio_queue_set_notification(q->tx_vq, 1); |
fa5e56c2 GK |
2194 | ret = virtio_net_flush_tx(q); |
2195 | if (ret == -EINVAL) { | |
2196 | return; | |
2197 | } else if (ret > 0) { | |
0c87e93e JW |
2198 | virtio_queue_set_notification(q->tx_vq, 0); |
2199 | qemu_bh_schedule(q->tx_bh); | |
2200 | q->tx_waiting = 1; | |
a697a334 AW |
2201 | } |
2202 | } | |
2203 | ||
f9d6dbf0 WC |
2204 | static void virtio_net_add_queue(VirtIONet *n, int index) |
2205 | { | |
2206 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
2207 | ||
1c0fbfa3 MT |
2208 | n->vqs[index].rx_vq = virtio_add_queue(vdev, n->net_conf.rx_queue_size, |
2209 | virtio_net_handle_rx); | |
9b02e161 | 2210 | |
f9d6dbf0 WC |
2211 | if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { |
2212 | n->vqs[index].tx_vq = | |
9b02e161 WW |
2213 | virtio_add_queue(vdev, n->net_conf.tx_queue_size, |
2214 | virtio_net_handle_tx_timer); | |
f9d6dbf0 WC |
2215 | n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
2216 | virtio_net_tx_timer, | |
2217 | &n->vqs[index]); | |
2218 | } else { | |
2219 | n->vqs[index].tx_vq = | |
9b02e161 WW |
2220 | virtio_add_queue(vdev, n->net_conf.tx_queue_size, |
2221 | virtio_net_handle_tx_bh); | |
f9d6dbf0 WC |
2222 | n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); |
2223 | } | |
2224 | ||
2225 | n->vqs[index].tx_waiting = 0; | |
2226 | n->vqs[index].n = n; | |
2227 | } | |
2228 | ||
2229 | static void virtio_net_del_queue(VirtIONet *n, int index) | |
2230 | { | |
2231 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
2232 | VirtIONetQueue *q = &n->vqs[index]; | |
2233 | NetClientState *nc = qemu_get_subqueue(n->nic, index); | |
2234 | ||
2235 | qemu_purge_queued_packets(nc); | |
2236 | ||
2237 | virtio_del_queue(vdev, index * 2); | |
2238 | if (q->tx_timer) { | |
2239 | timer_del(q->tx_timer); | |
2240 | timer_free(q->tx_timer); | |
f989c30c | 2241 | q->tx_timer = NULL; |
f9d6dbf0 WC |
2242 | } else { |
2243 | qemu_bh_delete(q->tx_bh); | |
f989c30c | 2244 | q->tx_bh = NULL; |
f9d6dbf0 | 2245 | } |
f989c30c | 2246 | q->tx_waiting = 0; |
f9d6dbf0 WC |
2247 | virtio_del_queue(vdev, index * 2 + 1); |
2248 | } | |
2249 | ||
2250 | static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) | |
2251 | { | |
2252 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
2253 | int old_num_queues = virtio_get_num_queues(vdev); | |
2254 | int new_num_queues = new_max_queues * 2 + 1; | |
2255 | int i; | |
2256 | ||
2257 | assert(old_num_queues >= 3); | |
2258 | assert(old_num_queues % 2 == 1); | |
2259 | ||
2260 | if (old_num_queues == new_num_queues) { | |
2261 | return; | |
2262 | } | |
2263 | ||
2264 | /* | |
2265 | * We always need to remove and add ctrl vq if | |
2266 | * old_num_queues != new_num_queues. Remove ctrl_vq first, | |
2267 | * and then we only enter one of the following too loops. | |
2268 | */ | |
2269 | virtio_del_queue(vdev, old_num_queues - 1); | |
2270 | ||
2271 | for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { | |
2272 | /* new_num_queues < old_num_queues */ | |
2273 | virtio_net_del_queue(n, i / 2); | |
2274 | } | |
2275 | ||
2276 | for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { | |
2277 | /* new_num_queues > old_num_queues */ | |
2278 | virtio_net_add_queue(n, i / 2); | |
2279 | } | |
2280 | ||
2281 | /* add ctrl_vq last */ | |
2282 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); | |
2283 | } | |
2284 | ||
ec57db16 | 2285 | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) |
fed699f9 | 2286 | { |
f9d6dbf0 WC |
2287 | int max = multiqueue ? n->max_queues : 1; |
2288 | ||
fed699f9 | 2289 | n->multiqueue = multiqueue; |
f9d6dbf0 | 2290 | virtio_net_change_num_queues(n, max); |
fed699f9 | 2291 | |
fed699f9 JW |
2292 | virtio_net_set_queues(n); |
2293 | } | |
2294 | ||
982b78c5 | 2295 | static int virtio_net_post_load_device(void *opaque, int version_id) |
037dab2f | 2296 | { |
982b78c5 DDAG |
2297 | VirtIONet *n = opaque; |
2298 | VirtIODevice *vdev = VIRTIO_DEVICE(n); | |
037dab2f | 2299 | int i, link_down; |
fbe78f4f | 2300 | |
982b78c5 | 2301 | virtio_net_set_mrg_rx_bufs(n, n->mergeable_rx_bufs, |
95129d6f CH |
2302 | virtio_vdev_has_feature(vdev, |
2303 | VIRTIO_F_VERSION_1)); | |
fbe78f4f | 2304 | |
76010cb3 | 2305 | /* MAC_TABLE_ENTRIES may be different from the saved image */ |
982b78c5 | 2306 | if (n->mac_table.in_use > MAC_TABLE_ENTRIES) { |
76010cb3 | 2307 | n->mac_table.in_use = 0; |
b6503ed9 | 2308 | } |
0ce0e8f4 | 2309 | |
982b78c5 | 2310 | if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { |
6c666823 MT |
2311 | n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); |
2312 | } | |
2313 | ||
2314 | if (peer_has_vnet_hdr(n)) { | |
2315 | virtio_net_apply_guest_offloads(n); | |
2316 | } | |
2317 | ||
5f800801 JW |
2318 | virtio_net_set_queues(n); |
2319 | ||
2d9aba39 AW |
2320 | /* Find the first multicast entry in the saved MAC filter */ |
2321 | for (i = 0; i < n->mac_table.in_use; i++) { | |
2322 | if (n->mac_table.macs[i * ETH_ALEN] & 1) { | |
2323 | break; | |
2324 | } | |
2325 | } | |
2326 | n->mac_table.first_multi = i; | |
98991481 AK |
2327 | |
2328 | /* nc.link_down can't be migrated, so infer link_down according | |
2329 | * to link status bit in n->status */ | |
5f800801 JW |
2330 | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; |
2331 | for (i = 0; i < n->max_queues; i++) { | |
2332 | qemu_get_subqueue(n->nic, i)->link_down = link_down; | |
2333 | } | |
98991481 | 2334 | |
6c666823 MT |
2335 | if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && |
2336 | virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { | |
2337 | n->announce_counter = SELF_ANNOUNCE_ROUNDS; | |
2338 | timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); | |
2339 | } | |
2340 | ||
fbe78f4f AL |
2341 | return 0; |
2342 | } | |
2343 | ||
982b78c5 DDAG |
2344 | /* tx_waiting field of a VirtIONetQueue */ |
2345 | static const VMStateDescription vmstate_virtio_net_queue_tx_waiting = { | |
2346 | .name = "virtio-net-queue-tx_waiting", | |
2347 | .fields = (VMStateField[]) { | |
2348 | VMSTATE_UINT32(tx_waiting, VirtIONetQueue), | |
2349 | VMSTATE_END_OF_LIST() | |
2350 | }, | |
2351 | }; | |
2352 | ||
2353 | static bool max_queues_gt_1(void *opaque, int version_id) | |
2354 | { | |
2355 | return VIRTIO_NET(opaque)->max_queues > 1; | |
2356 | } | |
2357 | ||
2358 | static bool has_ctrl_guest_offloads(void *opaque, int version_id) | |
2359 | { | |
2360 | return virtio_vdev_has_feature(VIRTIO_DEVICE(opaque), | |
2361 | VIRTIO_NET_F_CTRL_GUEST_OFFLOADS); | |
2362 | } | |
2363 | ||
2364 | static bool mac_table_fits(void *opaque, int version_id) | |
2365 | { | |
2366 | return VIRTIO_NET(opaque)->mac_table.in_use <= MAC_TABLE_ENTRIES; | |
2367 | } | |
2368 | ||
2369 | static bool mac_table_doesnt_fit(void *opaque, int version_id) | |
2370 | { | |
2371 | return !mac_table_fits(opaque, version_id); | |
2372 | } | |
2373 | ||
2374 | /* This temporary type is shared by all the WITH_TMP methods | |
2375 | * although only some fields are used by each. | |
2376 | */ | |
2377 | struct VirtIONetMigTmp { | |
2378 | VirtIONet *parent; | |
2379 | VirtIONetQueue *vqs_1; | |
2380 | uint16_t curr_queues_1; | |
2381 | uint8_t has_ufo; | |
2382 | uint32_t has_vnet_hdr; | |
2383 | }; | |
2384 | ||
2385 | /* The 2nd and subsequent tx_waiting flags are loaded later than | |
2386 | * the 1st entry in the queues and only if there's more than one | |
2387 | * entry. We use the tmp mechanism to calculate a temporary | |
2388 | * pointer and count and also validate the count. | |
2389 | */ | |
2390 | ||
44b1ff31 | 2391 | static int virtio_net_tx_waiting_pre_save(void *opaque) |
982b78c5 DDAG |
2392 | { |
2393 | struct VirtIONetMigTmp *tmp = opaque; | |
2394 | ||
2395 | tmp->vqs_1 = tmp->parent->vqs + 1; | |
2396 | tmp->curr_queues_1 = tmp->parent->curr_queues - 1; | |
2397 | if (tmp->parent->curr_queues == 0) { | |
2398 | tmp->curr_queues_1 = 0; | |
2399 | } | |
44b1ff31 DDAG |
2400 | |
2401 | return 0; | |
982b78c5 DDAG |
2402 | } |
2403 | ||
2404 | static int virtio_net_tx_waiting_pre_load(void *opaque) | |
2405 | { | |
2406 | struct VirtIONetMigTmp *tmp = opaque; | |
2407 | ||
2408 | /* Reuse the pointer setup from save */ | |
2409 | virtio_net_tx_waiting_pre_save(opaque); | |
2410 | ||
2411 | if (tmp->parent->curr_queues > tmp->parent->max_queues) { | |
2412 | error_report("virtio-net: curr_queues %x > max_queues %x", | |
2413 | tmp->parent->curr_queues, tmp->parent->max_queues); | |
2414 | ||
2415 | return -EINVAL; | |
2416 | } | |
2417 | ||
2418 | return 0; /* all good */ | |
2419 | } | |
2420 | ||
2421 | static const VMStateDescription vmstate_virtio_net_tx_waiting = { | |
2422 | .name = "virtio-net-tx_waiting", | |
2423 | .pre_load = virtio_net_tx_waiting_pre_load, | |
2424 | .pre_save = virtio_net_tx_waiting_pre_save, | |
2425 | .fields = (VMStateField[]) { | |
2426 | VMSTATE_STRUCT_VARRAY_POINTER_UINT16(vqs_1, struct VirtIONetMigTmp, | |
2427 | curr_queues_1, | |
2428 | vmstate_virtio_net_queue_tx_waiting, | |
2429 | struct VirtIONetQueue), | |
2430 | VMSTATE_END_OF_LIST() | |
2431 | }, | |
2432 | }; | |
2433 | ||
2434 | /* the 'has_ufo' flag is just tested; if the incoming stream has the | |
2435 | * flag set we need to check that we have it | |
2436 | */ | |
2437 | static int virtio_net_ufo_post_load(void *opaque, int version_id) | |
2438 | { | |
2439 | struct VirtIONetMigTmp *tmp = opaque; | |
2440 | ||
2441 | if (tmp->has_ufo && !peer_has_ufo(tmp->parent)) { | |
2442 | error_report("virtio-net: saved image requires TUN_F_UFO support"); | |
2443 | return -EINVAL; | |
2444 | } | |
2445 | ||
2446 | return 0; | |
2447 | } | |
2448 | ||
44b1ff31 | 2449 | static int virtio_net_ufo_pre_save(void *opaque) |
982b78c5 DDAG |
2450 | { |
2451 | struct VirtIONetMigTmp *tmp = opaque; | |
2452 | ||
2453 | tmp->has_ufo = tmp->parent->has_ufo; | |
44b1ff31 DDAG |
2454 | |
2455 | return 0; | |
982b78c5 DDAG |
2456 | } |
2457 | ||
2458 | static const VMStateDescription vmstate_virtio_net_has_ufo = { | |
2459 | .name = "virtio-net-ufo", | |
2460 | .post_load = virtio_net_ufo_post_load, | |
2461 | .pre_save = virtio_net_ufo_pre_save, | |
2462 | .fields = (VMStateField[]) { | |
2463 | VMSTATE_UINT8(has_ufo, struct VirtIONetMigTmp), | |
2464 | VMSTATE_END_OF_LIST() | |
2465 | }, | |
2466 | }; | |
2467 | ||
2468 | /* the 'has_vnet_hdr' flag is just tested; if the incoming stream has the | |
2469 | * flag set we need to check that we have it | |
2470 | */ | |
2471 | static int virtio_net_vnet_post_load(void *opaque, int version_id) | |
2472 | { | |
2473 | struct VirtIONetMigTmp *tmp = opaque; | |
2474 | ||
2475 | if (tmp->has_vnet_hdr && !peer_has_vnet_hdr(tmp->parent)) { | |
2476 | error_report("virtio-net: saved image requires vnet_hdr=on"); | |
2477 | return -EINVAL; | |
2478 | } | |
2479 | ||
2480 | return 0; | |
2481 | } | |
2482 | ||
44b1ff31 | 2483 | static int virtio_net_vnet_pre_save(void *opaque) |
982b78c5 DDAG |
2484 | { |
2485 | struct VirtIONetMigTmp *tmp = opaque; | |
2486 | ||
2487 | tmp->has_vnet_hdr = tmp->parent->has_vnet_hdr; | |
44b1ff31 DDAG |
2488 | |
2489 | return 0; | |
982b78c5 DDAG |
2490 | } |
2491 | ||
2492 | static const VMStateDescription vmstate_virtio_net_has_vnet = { | |
2493 | .name = "virtio-net-vnet", | |
2494 | .post_load = virtio_net_vnet_post_load, | |
2495 | .pre_save = virtio_net_vnet_pre_save, | |
2496 | .fields = (VMStateField[]) { | |
2497 | VMSTATE_UINT32(has_vnet_hdr, struct VirtIONetMigTmp), | |
2498 | VMSTATE_END_OF_LIST() | |
2499 | }, | |
2500 | }; | |
2501 | ||
2502 | static const VMStateDescription vmstate_virtio_net_device = { | |
2503 | .name = "virtio-net-device", | |
2504 | .version_id = VIRTIO_NET_VM_VERSION, | |
2505 | .minimum_version_id = VIRTIO_NET_VM_VERSION, | |
2506 | .post_load = virtio_net_post_load_device, | |
2507 | .fields = (VMStateField[]) { | |
2508 | VMSTATE_UINT8_ARRAY(mac, VirtIONet, ETH_ALEN), | |
2509 | VMSTATE_STRUCT_POINTER(vqs, VirtIONet, | |
2510 | vmstate_virtio_net_queue_tx_waiting, | |
2511 | VirtIONetQueue), | |
2512 | VMSTATE_UINT32(mergeable_rx_bufs, VirtIONet), | |
2513 | VMSTATE_UINT16(status, VirtIONet), | |
2514 | VMSTATE_UINT8(promisc, VirtIONet), | |
2515 | VMSTATE_UINT8(allmulti, VirtIONet), | |
2516 | VMSTATE_UINT32(mac_table.in_use, VirtIONet), | |
2517 | ||
2518 | /* Guarded pair: If it fits we load it, else we throw it away | |
2519 | * - can happen if source has a larger MAC table.; post-load | |
2520 | * sets flags in this case. | |
2521 | */ | |
2522 | VMSTATE_VBUFFER_MULTIPLY(mac_table.macs, VirtIONet, | |
2523 | 0, mac_table_fits, mac_table.in_use, | |
2524 | ETH_ALEN), | |
2525 | VMSTATE_UNUSED_VARRAY_UINT32(VirtIONet, mac_table_doesnt_fit, 0, | |
2526 | mac_table.in_use, ETH_ALEN), | |
2527 | ||
2528 | /* Note: This is an array of uint32's that's always been saved as a | |
2529 | * buffer; hold onto your endiannesses; it's actually used as a bitmap | |
2530 | * but based on the uint. | |
2531 | */ | |
2532 | VMSTATE_BUFFER_POINTER_UNSAFE(vlans, VirtIONet, 0, MAX_VLAN >> 3), | |
2533 | VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp, | |
2534 | vmstate_virtio_net_has_vnet), | |
2535 | VMSTATE_UINT8(mac_table.multi_overflow, VirtIONet), | |
2536 | VMSTATE_UINT8(mac_table.uni_overflow, VirtIONet), | |
2537 | VMSTATE_UINT8(alluni, VirtIONet), | |
2538 | VMSTATE_UINT8(nomulti, VirtIONet), | |
2539 | VMSTATE_UINT8(nouni, VirtIONet), | |
2540 | VMSTATE_UINT8(nobcast, VirtIONet), | |
2541 | VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp, | |
2542 | vmstate_virtio_net_has_ufo), | |
2543 | VMSTATE_SINGLE_TEST(max_queues, VirtIONet, max_queues_gt_1, 0, | |
2544 | vmstate_info_uint16_equal, uint16_t), | |
2545 | VMSTATE_UINT16_TEST(curr_queues, VirtIONet, max_queues_gt_1), | |
2546 | VMSTATE_WITH_TMP(VirtIONet, struct VirtIONetMigTmp, | |
2547 | vmstate_virtio_net_tx_waiting), | |
2548 | VMSTATE_UINT64_TEST(curr_guest_offloads, VirtIONet, | |
2549 | has_ctrl_guest_offloads), | |
2550 | VMSTATE_END_OF_LIST() | |
2551 | }, | |
2552 | }; | |
2553 | ||
eb6b6c12 | 2554 | static NetClientInfo net_virtio_info = { |
f394b2e2 | 2555 | .type = NET_CLIENT_DRIVER_NIC, |
eb6b6c12 MM |
2556 | .size = sizeof(NICState), |
2557 | .can_receive = virtio_net_can_receive, | |
2558 | .receive = virtio_net_receive, | |
eb6b6c12 | 2559 | .link_status_changed = virtio_net_set_link_status, |
b1be4280 | 2560 | .query_rx_filter = virtio_net_query_rxfilter, |
eb6b6c12 MM |
2561 | }; |
2562 | ||
f56a1247 MT |
2563 | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
2564 | { | |
17a0ca55 | 2565 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2566 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 2567 | assert(n->vhost_started); |
ed8b4afe | 2568 | return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); |
f56a1247 MT |
2569 | } |
2570 | ||
2571 | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, | |
2572 | bool mask) | |
2573 | { | |
17a0ca55 | 2574 | VirtIONet *n = VIRTIO_NET(vdev); |
fed699f9 | 2575 | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
f56a1247 | 2576 | assert(n->vhost_started); |
ed8b4afe | 2577 | vhost_net_virtqueue_mask(get_vhost_net(nc->peer), |
f56a1247 MT |
2578 | vdev, idx, mask); |
2579 | } | |
2580 | ||
019a3edb | 2581 | static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) |
fbe78f4f | 2582 | { |
14f9b664 | 2583 | int i, config_size = 0; |
0cd09c3a | 2584 | virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); |
a93e599d | 2585 | |
14f9b664 JL |
2586 | for (i = 0; feature_sizes[i].flags != 0; i++) { |
2587 | if (host_features & feature_sizes[i].flags) { | |
2588 | config_size = MAX(feature_sizes[i].end, config_size); | |
2589 | } | |
2590 | } | |
17ec5a86 FK |
2591 | n->config_size = config_size; |
2592 | } | |
2593 | ||
8a253ec2 FK |
2594 | void virtio_net_set_netclient_name(VirtIONet *n, const char *name, |
2595 | const char *type) | |
2596 | { | |
2597 | /* | |
2598 | * The name can be NULL, the netclient name will be type.x. | |
2599 | */ | |
2600 | assert(type != NULL); | |
2601 | ||
9e288406 | 2602 | g_free(n->netclient_name); |
9e288406 | 2603 | g_free(n->netclient_type); |
80e0090a | 2604 | n->netclient_name = g_strdup(name); |
8a253ec2 FK |
2605 | n->netclient_type = g_strdup(type); |
2606 | } | |
2607 | ||
e6f746b3 | 2608 | static void virtio_net_device_realize(DeviceState *dev, Error **errp) |
17ec5a86 | 2609 | { |
e6f746b3 | 2610 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
284a32f0 | 2611 | VirtIONet *n = VIRTIO_NET(dev); |
b1be4280 | 2612 | NetClientState *nc; |
284a32f0 | 2613 | int i; |
1773d9ee | 2614 | |
a93e599d | 2615 | if (n->net_conf.mtu) { |
127833ee | 2616 | n->host_features |= (1ULL << VIRTIO_NET_F_MTU); |
a93e599d MC |
2617 | } |
2618 | ||
9473939e JB |
2619 | if (n->net_conf.duplex_str) { |
2620 | if (strncmp(n->net_conf.duplex_str, "half", 5) == 0) { | |
2621 | n->net_conf.duplex = DUPLEX_HALF; | |
2622 | } else if (strncmp(n->net_conf.duplex_str, "full", 5) == 0) { | |
2623 | n->net_conf.duplex = DUPLEX_FULL; | |
2624 | } else { | |
2625 | error_setg(errp, "'duplex' must be 'half' or 'full'"); | |
2626 | } | |
2627 | n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX); | |
2628 | } else { | |
2629 | n->net_conf.duplex = DUPLEX_UNKNOWN; | |
2630 | } | |
2631 | ||
2632 | if (n->net_conf.speed < SPEED_UNKNOWN) { | |
2633 | error_setg(errp, "'speed' must be between 0 and INT_MAX"); | |
2634 | } else if (n->net_conf.speed >= 0) { | |
2635 | n->host_features |= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX); | |
2636 | } | |
2637 | ||
da3e8a23 | 2638 | virtio_net_set_config_size(n, n->host_features); |
284a32f0 | 2639 | virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); |
fbe78f4f | 2640 | |
1c0fbfa3 MT |
2641 | /* |
2642 | * We set a lower limit on RX queue size to what it always was. | |
2643 | * Guests that want a smaller ring can always resize it without | |
2644 | * help from us (using virtio 1 and up). | |
2645 | */ | |
2646 | if (n->net_conf.rx_queue_size < VIRTIO_NET_RX_QUEUE_MIN_SIZE || | |
2647 | n->net_conf.rx_queue_size > VIRTQUEUE_MAX_SIZE || | |
5f997fd1 | 2648 | !is_power_of_2(n->net_conf.rx_queue_size)) { |
1c0fbfa3 MT |
2649 | error_setg(errp, "Invalid rx_queue_size (= %" PRIu16 "), " |
2650 | "must be a power of 2 between %d and %d.", | |
2651 | n->net_conf.rx_queue_size, VIRTIO_NET_RX_QUEUE_MIN_SIZE, | |
2652 | VIRTQUEUE_MAX_SIZE); | |
2653 | virtio_cleanup(vdev); | |
2654 | return; | |
2655 | } | |
2656 | ||
9b02e161 WW |
2657 | if (n->net_conf.tx_queue_size < VIRTIO_NET_TX_QUEUE_MIN_SIZE || |
2658 | n->net_conf.tx_queue_size > VIRTQUEUE_MAX_SIZE || | |
2659 | !is_power_of_2(n->net_conf.tx_queue_size)) { | |
2660 | error_setg(errp, "Invalid tx_queue_size (= %" PRIu16 "), " | |
2661 | "must be a power of 2 between %d and %d", | |
2662 | n->net_conf.tx_queue_size, VIRTIO_NET_TX_QUEUE_MIN_SIZE, | |
2663 | VIRTQUEUE_MAX_SIZE); | |
2664 | virtio_cleanup(vdev); | |
2665 | return; | |
2666 | } | |
2667 | ||
575a1c0e | 2668 | n->max_queues = MAX(n->nic_conf.peers.queues, 1); |
87b3bd1c | 2669 | if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { |
7e0e736e | 2670 | error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " |
631b22ea | 2671 | "must be a positive integer less than %d.", |
87b3bd1c | 2672 | n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); |
7e0e736e JW |
2673 | virtio_cleanup(vdev); |
2674 | return; | |
2675 | } | |
f6b26cf2 | 2676 | n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); |
fed699f9 | 2677 | n->curr_queues = 1; |
1773d9ee | 2678 | n->tx_timeout = n->net_conf.txtimer; |
a697a334 | 2679 | |
1773d9ee FK |
2680 | if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") |
2681 | && strcmp(n->net_conf.tx, "bh")) { | |
0765691e MA |
2682 | warn_report("virtio-net: " |
2683 | "Unknown option tx=%s, valid options: \"timer\" \"bh\"", | |
2684 | n->net_conf.tx); | |
2685 | error_printf("Defaulting to \"bh\""); | |
a697a334 AW |
2686 | } |
2687 | ||
2eef278b MT |
2688 | n->net_conf.tx_queue_size = MIN(virtio_net_max_tx_queue_size(n), |
2689 | n->net_conf.tx_queue_size); | |
9b02e161 | 2690 | |
da51a335 | 2691 | for (i = 0; i < n->max_queues; i++) { |
f9d6dbf0 | 2692 | virtio_net_add_queue(n, i); |
a697a334 | 2693 | } |
da51a335 | 2694 | |
17a0ca55 | 2695 | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); |
1773d9ee FK |
2696 | qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); |
2697 | memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); | |
554c97dd | 2698 | n->status = VIRTIO_NET_S_LINK_UP; |
f57fcf70 JW |
2699 | n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, |
2700 | virtio_net_announce_timer, n); | |
fbe78f4f | 2701 | |
8a253ec2 FK |
2702 | if (n->netclient_type) { |
2703 | /* | |
2704 | * Happen when virtio_net_set_netclient_name has been called. | |
2705 | */ | |
2706 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
2707 | n->netclient_type, n->netclient_name, n); | |
2708 | } else { | |
2709 | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, | |
284a32f0 | 2710 | object_get_typename(OBJECT(dev)), dev->id, n); |
8a253ec2 FK |
2711 | } |
2712 | ||
6e371ab8 MT |
2713 | peer_test_vnet_hdr(n); |
2714 | if (peer_has_vnet_hdr(n)) { | |
fed699f9 | 2715 | for (i = 0; i < n->max_queues; i++) { |
d6085e3a | 2716 | qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); |
fed699f9 | 2717 | } |
6e371ab8 MT |
2718 | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
2719 | } else { | |
2720 | n->host_hdr_len = 0; | |
2721 | } | |
eb6b6c12 | 2722 | |
1773d9ee | 2723 | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); |
96d5e201 | 2724 | |
fed699f9 | 2725 | n->vqs[0].tx_waiting = 0; |
1773d9ee | 2726 | n->tx_burst = n->net_conf.txburst; |
bb9d17f8 | 2727 | virtio_net_set_mrg_rx_bufs(n, 0, 0); |
002437cd | 2728 | n->promisc = 1; /* for compatibility */ |
fbe78f4f | 2729 | |
7267c094 | 2730 | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
b6503ed9 | 2731 | |
7267c094 | 2732 | n->vlans = g_malloc0(MAX_VLAN >> 3); |
f21c0ed9 | 2733 | |
b1be4280 AK |
2734 | nc = qemu_get_queue(n->nic); |
2735 | nc->rxfilter_notify_enabled = 1; | |
2736 | ||
2974e916 | 2737 | QTAILQ_INIT(&n->rsc_chains); |
284a32f0 | 2738 | n->qdev = dev; |
17ec5a86 FK |
2739 | } |
2740 | ||
306ec6c3 | 2741 | static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) |
17ec5a86 | 2742 | { |
306ec6c3 AF |
2743 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
2744 | VirtIONet *n = VIRTIO_NET(dev); | |
f9d6dbf0 | 2745 | int i, max_queues; |
17ec5a86 FK |
2746 | |
2747 | /* This will stop vhost backend if appropriate. */ | |
2748 | virtio_net_set_status(vdev, 0); | |
2749 | ||
9e288406 MA |
2750 | g_free(n->netclient_name); |
2751 | n->netclient_name = NULL; | |
2752 | g_free(n->netclient_type); | |
2753 | n->netclient_type = NULL; | |
8a253ec2 | 2754 | |
17ec5a86 FK |
2755 | g_free(n->mac_table.macs); |
2756 | g_free(n->vlans); | |
2757 | ||
f9d6dbf0 WC |
2758 | max_queues = n->multiqueue ? n->max_queues : 1; |
2759 | for (i = 0; i < max_queues; i++) { | |
2760 | virtio_net_del_queue(n, i); | |
17ec5a86 FK |
2761 | } |
2762 | ||
f57fcf70 JW |
2763 | timer_del(n->announce_timer); |
2764 | timer_free(n->announce_timer); | |
17ec5a86 FK |
2765 | g_free(n->vqs); |
2766 | qemu_del_nic(n->nic); | |
2974e916 | 2767 | virtio_net_rsc_cleanup(n); |
6a1a8cc7 | 2768 | virtio_cleanup(vdev); |
17ec5a86 FK |
2769 | } |
2770 | ||
2771 | static void virtio_net_instance_init(Object *obj) | |
2772 | { | |
2773 | VirtIONet *n = VIRTIO_NET(obj); | |
2774 | ||
2775 | /* | |
2776 | * The default config_size is sizeof(struct virtio_net_config). | |
2777 | * Can be overriden with virtio_net_set_config_size. | |
2778 | */ | |
2779 | n->config_size = sizeof(struct virtio_net_config); | |
aa4197c3 GA |
2780 | device_add_bootindex_property(obj, &n->nic_conf.bootindex, |
2781 | "bootindex", "/ethernet-phy@0", | |
2782 | DEVICE(n), NULL); | |
17ec5a86 FK |
2783 | } |
2784 | ||
44b1ff31 | 2785 | static int virtio_net_pre_save(void *opaque) |
4d45dcfb HP |
2786 | { |
2787 | VirtIONet *n = opaque; | |
2788 | ||
2789 | /* At this point, backend must be stopped, otherwise | |
2790 | * it might keep writing to memory. */ | |
2791 | assert(!n->vhost_started); | |
44b1ff31 DDAG |
2792 | |
2793 | return 0; | |
4d45dcfb HP |
2794 | } |
2795 | ||
2796 | static const VMStateDescription vmstate_virtio_net = { | |
2797 | .name = "virtio-net", | |
2798 | .minimum_version_id = VIRTIO_NET_VM_VERSION, | |
2799 | .version_id = VIRTIO_NET_VM_VERSION, | |
2800 | .fields = (VMStateField[]) { | |
2801 | VMSTATE_VIRTIO_DEVICE, | |
2802 | VMSTATE_END_OF_LIST() | |
2803 | }, | |
2804 | .pre_save = virtio_net_pre_save, | |
2805 | }; | |
290c2428 | 2806 | |
17ec5a86 | 2807 | static Property virtio_net_properties[] = { |
127833ee JB |
2808 | DEFINE_PROP_BIT64("csum", VirtIONet, host_features, |
2809 | VIRTIO_NET_F_CSUM, true), | |
2810 | DEFINE_PROP_BIT64("guest_csum", VirtIONet, host_features, | |
87108bb2 | 2811 | VIRTIO_NET_F_GUEST_CSUM, true), |
127833ee JB |
2812 | DEFINE_PROP_BIT64("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), |
2813 | DEFINE_PROP_BIT64("guest_tso4", VirtIONet, host_features, | |
87108bb2 | 2814 | VIRTIO_NET_F_GUEST_TSO4, true), |
127833ee | 2815 | DEFINE_PROP_BIT64("guest_tso6", VirtIONet, host_features, |
87108bb2 | 2816 | VIRTIO_NET_F_GUEST_TSO6, true), |
127833ee | 2817 | DEFINE_PROP_BIT64("guest_ecn", VirtIONet, host_features, |
87108bb2 | 2818 | VIRTIO_NET_F_GUEST_ECN, true), |
127833ee | 2819 | DEFINE_PROP_BIT64("guest_ufo", VirtIONet, host_features, |
87108bb2 | 2820 | VIRTIO_NET_F_GUEST_UFO, true), |
127833ee | 2821 | DEFINE_PROP_BIT64("guest_announce", VirtIONet, host_features, |
87108bb2 | 2822 | VIRTIO_NET_F_GUEST_ANNOUNCE, true), |
127833ee | 2823 | DEFINE_PROP_BIT64("host_tso4", VirtIONet, host_features, |
87108bb2 | 2824 | VIRTIO_NET_F_HOST_TSO4, true), |
127833ee | 2825 | DEFINE_PROP_BIT64("host_tso6", VirtIONet, host_features, |
87108bb2 | 2826 | VIRTIO_NET_F_HOST_TSO6, true), |
127833ee | 2827 | DEFINE_PROP_BIT64("host_ecn", VirtIONet, host_features, |
87108bb2 | 2828 | VIRTIO_NET_F_HOST_ECN, true), |
127833ee | 2829 | DEFINE_PROP_BIT64("host_ufo", VirtIONet, host_features, |
87108bb2 | 2830 | VIRTIO_NET_F_HOST_UFO, true), |
127833ee | 2831 | DEFINE_PROP_BIT64("mrg_rxbuf", VirtIONet, host_features, |
87108bb2 | 2832 | VIRTIO_NET_F_MRG_RXBUF, true), |
127833ee | 2833 | DEFINE_PROP_BIT64("status", VirtIONet, host_features, |
87108bb2 | 2834 | VIRTIO_NET_F_STATUS, true), |
127833ee | 2835 | DEFINE_PROP_BIT64("ctrl_vq", VirtIONet, host_features, |
87108bb2 | 2836 | VIRTIO_NET_F_CTRL_VQ, true), |
127833ee | 2837 | DEFINE_PROP_BIT64("ctrl_rx", VirtIONet, host_features, |
87108bb2 | 2838 | VIRTIO_NET_F_CTRL_RX, true), |
127833ee | 2839 | DEFINE_PROP_BIT64("ctrl_vlan", VirtIONet, host_features, |
87108bb2 | 2840 | VIRTIO_NET_F_CTRL_VLAN, true), |
127833ee | 2841 | DEFINE_PROP_BIT64("ctrl_rx_extra", VirtIONet, host_features, |
87108bb2 | 2842 | VIRTIO_NET_F_CTRL_RX_EXTRA, true), |
127833ee | 2843 | DEFINE_PROP_BIT64("ctrl_mac_addr", VirtIONet, host_features, |
87108bb2 | 2844 | VIRTIO_NET_F_CTRL_MAC_ADDR, true), |
127833ee | 2845 | DEFINE_PROP_BIT64("ctrl_guest_offloads", VirtIONet, host_features, |
87108bb2 | 2846 | VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), |
127833ee | 2847 | DEFINE_PROP_BIT64("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), |
2974e916 YB |
2848 | DEFINE_PROP_BIT64("guest_rsc_ext", VirtIONet, host_features, |
2849 | VIRTIO_NET_F_RSC_EXT, false), | |
2850 | DEFINE_PROP_UINT32("rsc_interval", VirtIONet, rsc_timeout, | |
2851 | VIRTIO_NET_RSC_DEFAULT_INTERVAL), | |
17ec5a86 FK |
2852 | DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), |
2853 | DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, | |
87108bb2 | 2854 | TX_TIMER_INTERVAL), |
17ec5a86 FK |
2855 | DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), |
2856 | DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), | |
1c0fbfa3 MT |
2857 | DEFINE_PROP_UINT16("rx_queue_size", VirtIONet, net_conf.rx_queue_size, |
2858 | VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE), | |
9b02e161 WW |
2859 | DEFINE_PROP_UINT16("tx_queue_size", VirtIONet, net_conf.tx_queue_size, |
2860 | VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE), | |
a93e599d | 2861 | DEFINE_PROP_UINT16("host_mtu", VirtIONet, net_conf.mtu, 0), |
75ebec11 MC |
2862 | DEFINE_PROP_BOOL("x-mtu-bypass-backend", VirtIONet, mtu_bypass_backend, |
2863 | true), | |
9473939e JB |
2864 | DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN), |
2865 | DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str), | |
17ec5a86 FK |
2866 | DEFINE_PROP_END_OF_LIST(), |
2867 | }; | |
2868 | ||
2869 | static void virtio_net_class_init(ObjectClass *klass, void *data) | |
2870 | { | |
2871 | DeviceClass *dc = DEVICE_CLASS(klass); | |
2872 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); | |
e6f746b3 | 2873 | |
17ec5a86 | 2874 | dc->props = virtio_net_properties; |
290c2428 | 2875 | dc->vmsd = &vmstate_virtio_net; |
125ee0ed | 2876 | set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
e6f746b3 | 2877 | vdc->realize = virtio_net_device_realize; |
306ec6c3 | 2878 | vdc->unrealize = virtio_net_device_unrealize; |
17ec5a86 FK |
2879 | vdc->get_config = virtio_net_get_config; |
2880 | vdc->set_config = virtio_net_set_config; | |
2881 | vdc->get_features = virtio_net_get_features; | |
2882 | vdc->set_features = virtio_net_set_features; | |
2883 | vdc->bad_features = virtio_net_bad_features; | |
2884 | vdc->reset = virtio_net_reset; | |
2885 | vdc->set_status = virtio_net_set_status; | |
2886 | vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; | |
2887 | vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; | |
2a083ffd | 2888 | vdc->legacy_features |= (0x1 << VIRTIO_NET_F_GSO); |
982b78c5 | 2889 | vdc->vmsd = &vmstate_virtio_net_device; |
17ec5a86 FK |
2890 | } |
2891 | ||
2892 | static const TypeInfo virtio_net_info = { | |
2893 | .name = TYPE_VIRTIO_NET, | |
2894 | .parent = TYPE_VIRTIO_DEVICE, | |
2895 | .instance_size = sizeof(VirtIONet), | |
2896 | .instance_init = virtio_net_instance_init, | |
2897 | .class_init = virtio_net_class_init, | |
2898 | }; | |
2899 | ||
2900 | static void virtio_register_types(void) | |
2901 | { | |
2902 | type_register_static(&virtio_net_info); | |
2903 | } | |
2904 | ||
2905 | type_init(virtio_register_types) |