2 * Virtio Network Device
4 * Copyright IBM, Corp. 2007
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #include "qemu/osdep.h"
15 #include "qemu/atomic.h"
17 #include "qemu/main-loop.h"
18 #include "qemu/module.h"
19 #include "hw/virtio/virtio.h"
21 #include "net/checksum.h"
23 #include "qemu/error-report.h"
24 #include "qemu/timer.h"
25 #include "qemu/option.h"
26 #include "qemu/option_int.h"
27 #include "qemu/config-file.h"
28 #include "qapi/qmp/qdict.h"
29 #include "hw/virtio/virtio-net.h"
30 #include "net/vhost_net.h"
31 #include "net/announce.h"
32 #include "hw/virtio/virtio-bus.h"
33 #include "qapi/error.h"
34 #include "qapi/qapi-events-net.h"
35 #include "hw/qdev-properties.h"
36 #include "qapi/qapi-types-migration.h"
37 #include "qapi/qapi-events-migration.h"
38 #include "hw/virtio/virtio-access.h"
39 #include "migration/misc.h"
40 #include "standard-headers/linux/ethtool.h"
41 #include "sysemu/sysemu.h"
43 #include "monitor/qdev.h"
44 #include "hw/pci/pci.h"
45 #include "net_rx_pkt.h"
46 #include "hw/virtio/vhost.h"
48 #define VIRTIO_NET_VM_VERSION 11
50 #define MAC_TABLE_ENTRIES 64
51 #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */
53 /* previously fixed value */
54 #define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256
55 #define VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE 256
57 /* for now, only allow larger queues; with virtio-1, guest can downsize */
58 #define VIRTIO_NET_RX_QUEUE_MIN_SIZE VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE
59 #define VIRTIO_NET_TX_QUEUE_MIN_SIZE VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE
61 #define VIRTIO_NET_IP4_ADDR_SIZE 8 /* ipv4 saddr + daddr */
63 #define VIRTIO_NET_TCP_FLAG 0x3F
64 #define VIRTIO_NET_TCP_HDR_LENGTH 0xF000
66 /* IPv4 max payload, 16 bits in the header */
67 #define VIRTIO_NET_MAX_IP4_PAYLOAD (65535 - sizeof(struct ip_header))
68 #define VIRTIO_NET_MAX_TCP_PAYLOAD 65535
70 /* header length value in ip header without option */
71 #define VIRTIO_NET_IP4_HEADER_LENGTH 5
73 #define VIRTIO_NET_IP6_ADDR_SIZE 32 /* ipv6 saddr + daddr */
74 #define VIRTIO_NET_MAX_IP6_PAYLOAD VIRTIO_NET_MAX_TCP_PAYLOAD
76 /* Purge coalesced packets timer interval, This value affects the performance
77 a lot, and should be tuned carefully, '300000'(300us) is the recommended
78 value to pass the WHQL test, '50000' can gain 2x netperf throughput with
80 #define VIRTIO_NET_RSC_DEFAULT_INTERVAL 300000
82 #define VIRTIO_NET_RSS_SUPPORTED_HASHES (VIRTIO_NET_RSS_HASH_TYPE_IPv4 | \
83 VIRTIO_NET_RSS_HASH_TYPE_TCPv4 | \
84 VIRTIO_NET_RSS_HASH_TYPE_UDPv4 | \
85 VIRTIO_NET_RSS_HASH_TYPE_IPv6 | \
86 VIRTIO_NET_RSS_HASH_TYPE_TCPv6 | \
87 VIRTIO_NET_RSS_HASH_TYPE_UDPv6 | \
88 VIRTIO_NET_RSS_HASH_TYPE_IP_EX | \
89 VIRTIO_NET_RSS_HASH_TYPE_TCP_EX | \
90 VIRTIO_NET_RSS_HASH_TYPE_UDP_EX)
92 static VirtIOFeature feature_sizes
[] = {
93 {.flags
= 1ULL << VIRTIO_NET_F_MAC
,
94 .end
= endof(struct virtio_net_config
, mac
)},
95 {.flags
= 1ULL << VIRTIO_NET_F_STATUS
,
96 .end
= endof(struct virtio_net_config
, status
)},
97 {.flags
= 1ULL << VIRTIO_NET_F_MQ
,
98 .end
= endof(struct virtio_net_config
, max_virtqueue_pairs
)},
99 {.flags
= 1ULL << VIRTIO_NET_F_MTU
,
100 .end
= endof(struct virtio_net_config
, mtu
)},
101 {.flags
= 1ULL << VIRTIO_NET_F_SPEED_DUPLEX
,
102 .end
= endof(struct virtio_net_config
, duplex
)},
103 {.flags
= (1ULL << VIRTIO_NET_F_RSS
) | (1ULL << VIRTIO_NET_F_HASH_REPORT
),
104 .end
= endof(struct virtio_net_config
, supported_hash_types
)},
108 static VirtIONetQueue
*virtio_net_get_subqueue(NetClientState
*nc
)
110 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
112 return &n
->vqs
[nc
->queue_index
];
115 static int vq2q(int queue_index
)
117 return queue_index
/ 2;
121 * - we could suppress RX interrupt if we were so inclined.
124 static void virtio_net_get_config(VirtIODevice
*vdev
, uint8_t *config
)
126 VirtIONet
*n
= VIRTIO_NET(vdev
);
127 struct virtio_net_config netcfg
;
128 NetClientState
*nc
= qemu_get_queue(n
->nic
);
131 memset(&netcfg
, 0 , sizeof(struct virtio_net_config
));
132 virtio_stw_p(vdev
, &netcfg
.status
, n
->status
);
133 virtio_stw_p(vdev
, &netcfg
.max_virtqueue_pairs
, n
->max_queues
);
134 virtio_stw_p(vdev
, &netcfg
.mtu
, n
->net_conf
.mtu
);
135 memcpy(netcfg
.mac
, n
->mac
, ETH_ALEN
);
136 virtio_stl_p(vdev
, &netcfg
.speed
, n
->net_conf
.speed
);
137 netcfg
.duplex
= n
->net_conf
.duplex
;
138 netcfg
.rss_max_key_size
= VIRTIO_NET_RSS_MAX_KEY_SIZE
;
139 virtio_stw_p(vdev
, &netcfg
.rss_max_indirection_table_length
,
140 virtio_host_has_feature(vdev
, VIRTIO_NET_F_RSS
) ?
141 VIRTIO_NET_RSS_MAX_TABLE_LEN
: 1);
142 virtio_stl_p(vdev
, &netcfg
.supported_hash_types
,
143 VIRTIO_NET_RSS_SUPPORTED_HASHES
);
144 memcpy(config
, &netcfg
, n
->config_size
);
147 * Is this VDPA? No peer means not VDPA: there's no way to
148 * disconnect/reconnect a VDPA peer.
150 if (nc
->peer
&& nc
->peer
->info
->type
== NET_CLIENT_DRIVER_VHOST_VDPA
) {
151 ret
= vhost_net_get_config(get_vhost_net(nc
->peer
), (uint8_t *)&netcfg
,
154 memcpy(config
, &netcfg
, n
->config_size
);
159 static void virtio_net_set_config(VirtIODevice
*vdev
, const uint8_t *config
)
161 VirtIONet
*n
= VIRTIO_NET(vdev
);
162 struct virtio_net_config netcfg
= {};
163 NetClientState
*nc
= qemu_get_queue(n
->nic
);
165 memcpy(&netcfg
, config
, n
->config_size
);
167 if (!virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_CTRL_MAC_ADDR
) &&
168 !virtio_vdev_has_feature(vdev
, VIRTIO_F_VERSION_1
) &&
169 memcmp(netcfg
.mac
, n
->mac
, ETH_ALEN
)) {
170 memcpy(n
->mac
, netcfg
.mac
, ETH_ALEN
);
171 qemu_format_nic_info_str(qemu_get_queue(n
->nic
), n
->mac
);
175 * Is this VDPA? No peer means not VDPA: there's no way to
176 * disconnect/reconnect a VDPA peer.
178 if (nc
->peer
&& nc
->peer
->info
->type
== NET_CLIENT_DRIVER_VHOST_VDPA
) {
179 vhost_net_set_config(get_vhost_net(nc
->peer
),
180 (uint8_t *)&netcfg
, 0, n
->config_size
,
181 VHOST_SET_CONFIG_TYPE_MASTER
);
185 static bool virtio_net_started(VirtIONet
*n
, uint8_t status
)
187 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
188 return (status
& VIRTIO_CONFIG_S_DRIVER_OK
) &&
189 (n
->status
& VIRTIO_NET_S_LINK_UP
) && vdev
->vm_running
;
192 static void virtio_net_announce_notify(VirtIONet
*net
)
194 VirtIODevice
*vdev
= VIRTIO_DEVICE(net
);
195 trace_virtio_net_announce_notify();
197 net
->status
|= VIRTIO_NET_S_ANNOUNCE
;
198 virtio_notify_config(vdev
);
201 static void virtio_net_announce_timer(void *opaque
)
203 VirtIONet
*n
= opaque
;
204 trace_virtio_net_announce_timer(n
->announce_timer
.round
);
206 n
->announce_timer
.round
--;
207 virtio_net_announce_notify(n
);
210 static void virtio_net_announce(NetClientState
*nc
)
212 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
213 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
216 * Make sure the virtio migration announcement timer isn't running
217 * If it is, let it trigger announcement so that we do not cause
220 if (n
->announce_timer
.round
) {
224 if (virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_GUEST_ANNOUNCE
) &&
225 virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_CTRL_VQ
)) {
226 virtio_net_announce_notify(n
);
230 static void virtio_net_vhost_status(VirtIONet
*n
, uint8_t status
)
232 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
233 NetClientState
*nc
= qemu_get_queue(n
->nic
);
234 int queues
= n
->multiqueue
? n
->max_queues
: 1;
236 if (!get_vhost_net(nc
->peer
)) {
240 if ((virtio_net_started(n
, status
) && !nc
->peer
->link_down
) ==
241 !!n
->vhost_started
) {
244 if (!n
->vhost_started
) {
247 if (n
->needs_vnet_hdr_swap
) {
248 error_report("backend does not support %s vnet headers; "
249 "falling back on userspace virtio",
250 virtio_is_big_endian(vdev
) ? "BE" : "LE");
254 /* Any packets outstanding? Purge them to avoid touching rings
255 * when vhost is running.
257 for (i
= 0; i
< queues
; i
++) {
258 NetClientState
*qnc
= qemu_get_subqueue(n
->nic
, i
);
260 /* Purge both directions: TX and RX. */
261 qemu_net_queue_purge(qnc
->peer
->incoming_queue
, qnc
);
262 qemu_net_queue_purge(qnc
->incoming_queue
, qnc
->peer
);
265 if (virtio_has_feature(vdev
->guest_features
, VIRTIO_NET_F_MTU
)) {
266 r
= vhost_net_set_mtu(get_vhost_net(nc
->peer
), n
->net_conf
.mtu
);
268 error_report("%uBytes MTU not supported by the backend",
275 n
->vhost_started
= 1;
276 r
= vhost_net_start(vdev
, n
->nic
->ncs
, queues
);
278 error_report("unable to start vhost net: %d: "
279 "falling back on userspace virtio", -r
);
280 n
->vhost_started
= 0;
283 vhost_net_stop(vdev
, n
->nic
->ncs
, queues
);
284 n
->vhost_started
= 0;
288 static int virtio_net_set_vnet_endian_one(VirtIODevice
*vdev
,
289 NetClientState
*peer
,
292 if (virtio_is_big_endian(vdev
)) {
293 return qemu_set_vnet_be(peer
, enable
);
295 return qemu_set_vnet_le(peer
, enable
);
299 static bool virtio_net_set_vnet_endian(VirtIODevice
*vdev
, NetClientState
*ncs
,
300 int queues
, bool enable
)
304 for (i
= 0; i
< queues
; i
++) {
305 if (virtio_net_set_vnet_endian_one(vdev
, ncs
[i
].peer
, enable
) < 0 &&
308 virtio_net_set_vnet_endian_one(vdev
, ncs
[i
].peer
, false);
318 static void virtio_net_vnet_endian_status(VirtIONet
*n
, uint8_t status
)
320 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
321 int queues
= n
->multiqueue
? n
->max_queues
: 1;
323 if (virtio_net_started(n
, status
)) {
324 /* Before using the device, we tell the network backend about the
325 * endianness to use when parsing vnet headers. If the backend
326 * can't do it, we fallback onto fixing the headers in the core
329 n
->needs_vnet_hdr_swap
= virtio_net_set_vnet_endian(vdev
, n
->nic
->ncs
,
331 } else if (virtio_net_started(n
, vdev
->status
)) {
332 /* After using the device, we need to reset the network backend to
333 * the default (guest native endianness), otherwise the guest may
334 * lose network connectivity if it is rebooted into a different
337 virtio_net_set_vnet_endian(vdev
, n
->nic
->ncs
, queues
, false);
341 static void virtio_net_drop_tx_queue_data(VirtIODevice
*vdev
, VirtQueue
*vq
)
343 unsigned int dropped
= virtqueue_drop_all(vq
);
345 virtio_notify(vdev
, vq
);
349 static void virtio_net_set_status(struct VirtIODevice
*vdev
, uint8_t status
)
351 VirtIONet
*n
= VIRTIO_NET(vdev
);
354 uint8_t queue_status
;
356 virtio_net_vnet_endian_status(n
, status
);
357 virtio_net_vhost_status(n
, status
);
359 for (i
= 0; i
< n
->max_queues
; i
++) {
360 NetClientState
*ncs
= qemu_get_subqueue(n
->nic
, i
);
364 if ((!n
->multiqueue
&& i
!= 0) || i
>= n
->curr_queues
) {
367 queue_status
= status
;
370 virtio_net_started(n
, queue_status
) && !n
->vhost_started
;
373 qemu_flush_queued_packets(ncs
);
376 if (!q
->tx_waiting
) {
382 timer_mod(q
->tx_timer
,
383 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) + n
->tx_timeout
);
385 qemu_bh_schedule(q
->tx_bh
);
389 timer_del(q
->tx_timer
);
391 qemu_bh_cancel(q
->tx_bh
);
393 if ((n
->status
& VIRTIO_NET_S_LINK_UP
) == 0 &&
394 (queue_status
& VIRTIO_CONFIG_S_DRIVER_OK
) &&
396 /* if tx is waiting we are likely have some packets in tx queue
397 * and disabled notification */
399 virtio_queue_set_notification(q
->tx_vq
, 1);
400 virtio_net_drop_tx_queue_data(vdev
, q
->tx_vq
);
406 static void virtio_net_set_link_status(NetClientState
*nc
)
408 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
409 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
410 uint16_t old_status
= n
->status
;
413 n
->status
&= ~VIRTIO_NET_S_LINK_UP
;
415 n
->status
|= VIRTIO_NET_S_LINK_UP
;
417 if (n
->status
!= old_status
)
418 virtio_notify_config(vdev
);
420 virtio_net_set_status(vdev
, vdev
->status
);
423 static void rxfilter_notify(NetClientState
*nc
)
425 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
427 if (nc
->rxfilter_notify_enabled
) {
428 char *path
= object_get_canonical_path(OBJECT(n
->qdev
));
429 qapi_event_send_nic_rx_filter_changed(!!n
->netclient_name
,
430 n
->netclient_name
, path
);
433 /* disable event notification to avoid events flooding */
434 nc
->rxfilter_notify_enabled
= 0;
438 static intList
*get_vlan_table(VirtIONet
*n
)
444 for (i
= 0; i
< MAX_VLAN
>> 5; i
++) {
445 for (j
= 0; n
->vlans
[i
] && j
<= 0x1f; j
++) {
446 if (n
->vlans
[i
] & (1U << j
)) {
447 QAPI_LIST_PREPEND(list
, (i
<< 5) + j
);
455 static RxFilterInfo
*virtio_net_query_rxfilter(NetClientState
*nc
)
457 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
458 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
463 info
= g_malloc0(sizeof(*info
));
464 info
->name
= g_strdup(nc
->name
);
465 info
->promiscuous
= n
->promisc
;
468 info
->unicast
= RX_STATE_NONE
;
469 } else if (n
->alluni
) {
470 info
->unicast
= RX_STATE_ALL
;
472 info
->unicast
= RX_STATE_NORMAL
;
476 info
->multicast
= RX_STATE_NONE
;
477 } else if (n
->allmulti
) {
478 info
->multicast
= RX_STATE_ALL
;
480 info
->multicast
= RX_STATE_NORMAL
;
483 info
->broadcast_allowed
= n
->nobcast
;
484 info
->multicast_overflow
= n
->mac_table
.multi_overflow
;
485 info
->unicast_overflow
= n
->mac_table
.uni_overflow
;
487 info
->main_mac
= qemu_mac_strdup_printf(n
->mac
);
490 for (i
= 0; i
< n
->mac_table
.first_multi
; i
++) {
491 QAPI_LIST_PREPEND(str_list
,
492 qemu_mac_strdup_printf(n
->mac_table
.macs
+ i
* ETH_ALEN
));
494 info
->unicast_table
= str_list
;
497 for (i
= n
->mac_table
.first_multi
; i
< n
->mac_table
.in_use
; i
++) {
498 QAPI_LIST_PREPEND(str_list
,
499 qemu_mac_strdup_printf(n
->mac_table
.macs
+ i
* ETH_ALEN
));
501 info
->multicast_table
= str_list
;
502 info
->vlan_table
= get_vlan_table(n
);
504 if (!virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_CTRL_VLAN
)) {
505 info
->vlan
= RX_STATE_ALL
;
506 } else if (!info
->vlan_table
) {
507 info
->vlan
= RX_STATE_NONE
;
509 info
->vlan
= RX_STATE_NORMAL
;
512 /* enable event notification after query */
513 nc
->rxfilter_notify_enabled
= 1;
518 static void virtio_net_reset(VirtIODevice
*vdev
)
520 VirtIONet
*n
= VIRTIO_NET(vdev
);
523 /* Reset back to compatibility mode */
530 /* multiqueue is disabled by default */
532 timer_del(n
->announce_timer
.tm
);
533 n
->announce_timer
.round
= 0;
534 n
->status
&= ~VIRTIO_NET_S_ANNOUNCE
;
536 /* Flush any MAC and VLAN filter table state */
537 n
->mac_table
.in_use
= 0;
538 n
->mac_table
.first_multi
= 0;
539 n
->mac_table
.multi_overflow
= 0;
540 n
->mac_table
.uni_overflow
= 0;
541 memset(n
->mac_table
.macs
, 0, MAC_TABLE_ENTRIES
* ETH_ALEN
);
542 memcpy(&n
->mac
[0], &n
->nic
->conf
->macaddr
, sizeof(n
->mac
));
543 qemu_format_nic_info_str(qemu_get_queue(n
->nic
), n
->mac
);
544 memset(n
->vlans
, 0, MAX_VLAN
>> 3);
546 /* Flush any async TX */
547 for (i
= 0; i
< n
->max_queues
; i
++) {
548 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, i
);
551 qemu_flush_or_purge_queued_packets(nc
->peer
, true);
552 assert(!virtio_net_get_subqueue(nc
)->async_tx
.elem
);
557 static void peer_test_vnet_hdr(VirtIONet
*n
)
559 NetClientState
*nc
= qemu_get_queue(n
->nic
);
564 n
->has_vnet_hdr
= qemu_has_vnet_hdr(nc
->peer
);
567 static int peer_has_vnet_hdr(VirtIONet
*n
)
569 return n
->has_vnet_hdr
;
572 static int peer_has_ufo(VirtIONet
*n
)
574 if (!peer_has_vnet_hdr(n
))
577 n
->has_ufo
= qemu_has_ufo(qemu_get_queue(n
->nic
)->peer
);
582 static void virtio_net_set_mrg_rx_bufs(VirtIONet
*n
, int mergeable_rx_bufs
,
583 int version_1
, int hash_report
)
588 n
->mergeable_rx_bufs
= mergeable_rx_bufs
;
591 n
->guest_hdr_len
= hash_report
?
592 sizeof(struct virtio_net_hdr_v1_hash
) :
593 sizeof(struct virtio_net_hdr_mrg_rxbuf
);
594 n
->rss_data
.populate_hash
= !!hash_report
;
596 n
->guest_hdr_len
= n
->mergeable_rx_bufs
?
597 sizeof(struct virtio_net_hdr_mrg_rxbuf
) :
598 sizeof(struct virtio_net_hdr
);
601 for (i
= 0; i
< n
->max_queues
; i
++) {
602 nc
= qemu_get_subqueue(n
->nic
, i
);
604 if (peer_has_vnet_hdr(n
) &&
605 qemu_has_vnet_hdr_len(nc
->peer
, n
->guest_hdr_len
)) {
606 qemu_set_vnet_hdr_len(nc
->peer
, n
->guest_hdr_len
);
607 n
->host_hdr_len
= n
->guest_hdr_len
;
612 static int virtio_net_max_tx_queue_size(VirtIONet
*n
)
614 NetClientState
*peer
= n
->nic_conf
.peers
.ncs
[0];
617 * Backends other than vhost-user don't support max queue size.
620 return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE
;
623 if (peer
->info
->type
!= NET_CLIENT_DRIVER_VHOST_USER
) {
624 return VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE
;
627 return VIRTQUEUE_MAX_SIZE
;
630 static int peer_attach(VirtIONet
*n
, int index
)
632 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, index
);
638 if (nc
->peer
->info
->type
== NET_CLIENT_DRIVER_VHOST_USER
) {
639 vhost_set_vring_enable(nc
->peer
, 1);
642 if (nc
->peer
->info
->type
!= NET_CLIENT_DRIVER_TAP
) {
646 if (n
->max_queues
== 1) {
650 return tap_enable(nc
->peer
);
653 static int peer_detach(VirtIONet
*n
, int index
)
655 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, index
);
661 if (nc
->peer
->info
->type
== NET_CLIENT_DRIVER_VHOST_USER
) {
662 vhost_set_vring_enable(nc
->peer
, 0);
665 if (nc
->peer
->info
->type
!= NET_CLIENT_DRIVER_TAP
) {
669 return tap_disable(nc
->peer
);
672 static void virtio_net_set_queues(VirtIONet
*n
)
677 if (n
->nic
->peer_deleted
) {
681 for (i
= 0; i
< n
->max_queues
; i
++) {
682 if (i
< n
->curr_queues
) {
683 r
= peer_attach(n
, i
);
686 r
= peer_detach(n
, i
);
692 static void virtio_net_set_multiqueue(VirtIONet
*n
, int multiqueue
);
694 static uint64_t virtio_net_get_features(VirtIODevice
*vdev
, uint64_t features
,
697 VirtIONet
*n
= VIRTIO_NET(vdev
);
698 NetClientState
*nc
= qemu_get_queue(n
->nic
);
700 /* Firstly sync all virtio-net possible supported features */
701 features
|= n
->host_features
;
703 virtio_add_feature(&features
, VIRTIO_NET_F_MAC
);
705 if (!peer_has_vnet_hdr(n
)) {
706 virtio_clear_feature(&features
, VIRTIO_NET_F_CSUM
);
707 virtio_clear_feature(&features
, VIRTIO_NET_F_HOST_TSO4
);
708 virtio_clear_feature(&features
, VIRTIO_NET_F_HOST_TSO6
);
709 virtio_clear_feature(&features
, VIRTIO_NET_F_HOST_ECN
);
711 virtio_clear_feature(&features
, VIRTIO_NET_F_GUEST_CSUM
);
712 virtio_clear_feature(&features
, VIRTIO_NET_F_GUEST_TSO4
);
713 virtio_clear_feature(&features
, VIRTIO_NET_F_GUEST_TSO6
);
714 virtio_clear_feature(&features
, VIRTIO_NET_F_GUEST_ECN
);
716 virtio_clear_feature(&features
, VIRTIO_NET_F_HASH_REPORT
);
719 if (!peer_has_vnet_hdr(n
) || !peer_has_ufo(n
)) {
720 virtio_clear_feature(&features
, VIRTIO_NET_F_GUEST_UFO
);
721 virtio_clear_feature(&features
, VIRTIO_NET_F_HOST_UFO
);
724 if (!get_vhost_net(nc
->peer
)) {
728 virtio_clear_feature(&features
, VIRTIO_NET_F_RSS
);
729 virtio_clear_feature(&features
, VIRTIO_NET_F_HASH_REPORT
);
730 features
= vhost_net_get_features(get_vhost_net(nc
->peer
), features
);
731 vdev
->backend_features
= features
;
733 if (n
->mtu_bypass_backend
&&
734 (n
->host_features
& 1ULL << VIRTIO_NET_F_MTU
)) {
735 features
|= (1ULL << VIRTIO_NET_F_MTU
);
741 static uint64_t virtio_net_bad_features(VirtIODevice
*vdev
)
743 uint64_t features
= 0;
745 /* Linux kernel 2.6.25. It understood MAC (as everyone must),
747 virtio_add_feature(&features
, VIRTIO_NET_F_MAC
);
748 virtio_add_feature(&features
, VIRTIO_NET_F_CSUM
);
749 virtio_add_feature(&features
, VIRTIO_NET_F_HOST_TSO4
);
750 virtio_add_feature(&features
, VIRTIO_NET_F_HOST_TSO6
);
751 virtio_add_feature(&features
, VIRTIO_NET_F_HOST_ECN
);
756 static void virtio_net_apply_guest_offloads(VirtIONet
*n
)
758 qemu_set_offload(qemu_get_queue(n
->nic
)->peer
,
759 !!(n
->curr_guest_offloads
& (1ULL << VIRTIO_NET_F_GUEST_CSUM
)),
760 !!(n
->curr_guest_offloads
& (1ULL << VIRTIO_NET_F_GUEST_TSO4
)),
761 !!(n
->curr_guest_offloads
& (1ULL << VIRTIO_NET_F_GUEST_TSO6
)),
762 !!(n
->curr_guest_offloads
& (1ULL << VIRTIO_NET_F_GUEST_ECN
)),
763 !!(n
->curr_guest_offloads
& (1ULL << VIRTIO_NET_F_GUEST_UFO
)));
766 static uint64_t virtio_net_guest_offloads_by_features(uint32_t features
)
768 static const uint64_t guest_offloads_mask
=
769 (1ULL << VIRTIO_NET_F_GUEST_CSUM
) |
770 (1ULL << VIRTIO_NET_F_GUEST_TSO4
) |
771 (1ULL << VIRTIO_NET_F_GUEST_TSO6
) |
772 (1ULL << VIRTIO_NET_F_GUEST_ECN
) |
773 (1ULL << VIRTIO_NET_F_GUEST_UFO
);
775 return guest_offloads_mask
& features
;
778 static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet
*n
)
780 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
781 return virtio_net_guest_offloads_by_features(vdev
->guest_features
);
790 * Set the id of the failover primary device
792 * @opaque: FailoverId to setup
793 * @opts: opts for device we are handling
794 * @errp: returns an error if this function fails
796 static int failover_set_primary(void *opaque
, QemuOpts
*opts
, Error
**errp
)
798 FailoverId
*fid
= opaque
;
799 const char *standby_id
= qemu_opt_get(opts
, "failover_pair_id");
801 if (g_strcmp0(standby_id
, fid
->n
->netclient_name
) == 0) {
802 fid
->id
= g_strdup(opts
->id
);
810 * Find the primary device id for this failover virtio-net
812 * @n: VirtIONet device
813 * @errp: returns an error if this function fails
815 static char *failover_find_primary_device_id(VirtIONet
*n
)
821 if (!qemu_opts_foreach(qemu_find_opts("device"),
822 failover_set_primary
, &fid
, &err
)) {
829 * Find the primary device for this failover virtio-net
831 * @n: VirtIONet device
832 * @errp: returns an error if this function fails
834 static DeviceState
*failover_find_primary_device(VirtIONet
*n
)
836 char *id
= failover_find_primary_device_id(n
);
842 return qdev_find_recursive(sysbus_get_default(), id
);
845 static void failover_add_primary(VirtIONet
*n
, Error
**errp
)
850 DeviceState
*dev
= failover_find_primary_device(n
);
856 id
= failover_find_primary_device_id(n
);
860 opts
= qemu_opts_find(qemu_find_opts("device"), id
);
862 dev
= qdev_device_add(opts
, &err
);
867 error_setg(errp
, "Primary device not found");
868 error_append_hint(errp
, "Virtio-net failover will not work. Make "
869 "sure primary device has parameter"
870 " failover_pair_id=<virtio-net-id>\n");
872 error_propagate(errp
, err
);
875 static void virtio_net_set_features(VirtIODevice
*vdev
, uint64_t features
)
877 VirtIONet
*n
= VIRTIO_NET(vdev
);
881 if (n
->mtu_bypass_backend
&&
882 !virtio_has_feature(vdev
->backend_features
, VIRTIO_NET_F_MTU
)) {
883 features
&= ~(1ULL << VIRTIO_NET_F_MTU
);
886 virtio_net_set_multiqueue(n
,
887 virtio_has_feature(features
, VIRTIO_NET_F_RSS
) ||
888 virtio_has_feature(features
, VIRTIO_NET_F_MQ
));
890 virtio_net_set_mrg_rx_bufs(n
,
891 virtio_has_feature(features
,
892 VIRTIO_NET_F_MRG_RXBUF
),
893 virtio_has_feature(features
,
895 virtio_has_feature(features
,
896 VIRTIO_NET_F_HASH_REPORT
));
898 n
->rsc4_enabled
= virtio_has_feature(features
, VIRTIO_NET_F_RSC_EXT
) &&
899 virtio_has_feature(features
, VIRTIO_NET_F_GUEST_TSO4
);
900 n
->rsc6_enabled
= virtio_has_feature(features
, VIRTIO_NET_F_RSC_EXT
) &&
901 virtio_has_feature(features
, VIRTIO_NET_F_GUEST_TSO6
);
902 n
->rss_data
.redirect
= virtio_has_feature(features
, VIRTIO_NET_F_RSS
);
904 if (n
->has_vnet_hdr
) {
905 n
->curr_guest_offloads
=
906 virtio_net_guest_offloads_by_features(features
);
907 virtio_net_apply_guest_offloads(n
);
910 for (i
= 0; i
< n
->max_queues
; i
++) {
911 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, i
);
913 if (!get_vhost_net(nc
->peer
)) {
916 vhost_net_ack_features(get_vhost_net(nc
->peer
), features
);
919 if (virtio_has_feature(features
, VIRTIO_NET_F_CTRL_VLAN
)) {
920 memset(n
->vlans
, 0, MAX_VLAN
>> 3);
922 memset(n
->vlans
, 0xff, MAX_VLAN
>> 3);
925 if (virtio_has_feature(features
, VIRTIO_NET_F_STANDBY
)) {
926 qapi_event_send_failover_negotiated(n
->netclient_name
);
927 qatomic_set(&n
->failover_primary_hidden
, false);
928 failover_add_primary(n
, &err
);
930 warn_report_err(err
);
935 static int virtio_net_handle_rx_mode(VirtIONet
*n
, uint8_t cmd
,
936 struct iovec
*iov
, unsigned int iov_cnt
)
940 NetClientState
*nc
= qemu_get_queue(n
->nic
);
942 s
= iov_to_buf(iov
, iov_cnt
, 0, &on
, sizeof(on
));
943 if (s
!= sizeof(on
)) {
944 return VIRTIO_NET_ERR
;
947 if (cmd
== VIRTIO_NET_CTRL_RX_PROMISC
) {
949 } else if (cmd
== VIRTIO_NET_CTRL_RX_ALLMULTI
) {
951 } else if (cmd
== VIRTIO_NET_CTRL_RX_ALLUNI
) {
953 } else if (cmd
== VIRTIO_NET_CTRL_RX_NOMULTI
) {
955 } else if (cmd
== VIRTIO_NET_CTRL_RX_NOUNI
) {
957 } else if (cmd
== VIRTIO_NET_CTRL_RX_NOBCAST
) {
960 return VIRTIO_NET_ERR
;
965 return VIRTIO_NET_OK
;
968 static int virtio_net_handle_offloads(VirtIONet
*n
, uint8_t cmd
,
969 struct iovec
*iov
, unsigned int iov_cnt
)
971 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
975 if (!virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS
)) {
976 return VIRTIO_NET_ERR
;
979 s
= iov_to_buf(iov
, iov_cnt
, 0, &offloads
, sizeof(offloads
));
980 if (s
!= sizeof(offloads
)) {
981 return VIRTIO_NET_ERR
;
984 if (cmd
== VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET
) {
985 uint64_t supported_offloads
;
987 offloads
= virtio_ldq_p(vdev
, &offloads
);
989 if (!n
->has_vnet_hdr
) {
990 return VIRTIO_NET_ERR
;
993 n
->rsc4_enabled
= virtio_has_feature(offloads
, VIRTIO_NET_F_RSC_EXT
) &&
994 virtio_has_feature(offloads
, VIRTIO_NET_F_GUEST_TSO4
);
995 n
->rsc6_enabled
= virtio_has_feature(offloads
, VIRTIO_NET_F_RSC_EXT
) &&
996 virtio_has_feature(offloads
, VIRTIO_NET_F_GUEST_TSO6
);
997 virtio_clear_feature(&offloads
, VIRTIO_NET_F_RSC_EXT
);
999 supported_offloads
= virtio_net_supported_guest_offloads(n
);
1000 if (offloads
& ~supported_offloads
) {
1001 return VIRTIO_NET_ERR
;
1004 n
->curr_guest_offloads
= offloads
;
1005 virtio_net_apply_guest_offloads(n
);
1007 return VIRTIO_NET_OK
;
1009 return VIRTIO_NET_ERR
;
1013 static int virtio_net_handle_mac(VirtIONet
*n
, uint8_t cmd
,
1014 struct iovec
*iov
, unsigned int iov_cnt
)
1016 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
1017 struct virtio_net_ctrl_mac mac_data
;
1019 NetClientState
*nc
= qemu_get_queue(n
->nic
);
1021 if (cmd
== VIRTIO_NET_CTRL_MAC_ADDR_SET
) {
1022 if (iov_size(iov
, iov_cnt
) != sizeof(n
->mac
)) {
1023 return VIRTIO_NET_ERR
;
1025 s
= iov_to_buf(iov
, iov_cnt
, 0, &n
->mac
, sizeof(n
->mac
));
1026 assert(s
== sizeof(n
->mac
));
1027 qemu_format_nic_info_str(qemu_get_queue(n
->nic
), n
->mac
);
1028 rxfilter_notify(nc
);
1030 return VIRTIO_NET_OK
;
1033 if (cmd
!= VIRTIO_NET_CTRL_MAC_TABLE_SET
) {
1034 return VIRTIO_NET_ERR
;
1038 int first_multi
= 0;
1039 uint8_t uni_overflow
= 0;
1040 uint8_t multi_overflow
= 0;
1041 uint8_t *macs
= g_malloc0(MAC_TABLE_ENTRIES
* ETH_ALEN
);
1043 s
= iov_to_buf(iov
, iov_cnt
, 0, &mac_data
.entries
,
1044 sizeof(mac_data
.entries
));
1045 mac_data
.entries
= virtio_ldl_p(vdev
, &mac_data
.entries
);
1046 if (s
!= sizeof(mac_data
.entries
)) {
1049 iov_discard_front(&iov
, &iov_cnt
, s
);
1051 if (mac_data
.entries
* ETH_ALEN
> iov_size(iov
, iov_cnt
)) {
1055 if (mac_data
.entries
<= MAC_TABLE_ENTRIES
) {
1056 s
= iov_to_buf(iov
, iov_cnt
, 0, macs
,
1057 mac_data
.entries
* ETH_ALEN
);
1058 if (s
!= mac_data
.entries
* ETH_ALEN
) {
1061 in_use
+= mac_data
.entries
;
1066 iov_discard_front(&iov
, &iov_cnt
, mac_data
.entries
* ETH_ALEN
);
1068 first_multi
= in_use
;
1070 s
= iov_to_buf(iov
, iov_cnt
, 0, &mac_data
.entries
,
1071 sizeof(mac_data
.entries
));
1072 mac_data
.entries
= virtio_ldl_p(vdev
, &mac_data
.entries
);
1073 if (s
!= sizeof(mac_data
.entries
)) {
1077 iov_discard_front(&iov
, &iov_cnt
, s
);
1079 if (mac_data
.entries
* ETH_ALEN
!= iov_size(iov
, iov_cnt
)) {
1083 if (mac_data
.entries
<= MAC_TABLE_ENTRIES
- in_use
) {
1084 s
= iov_to_buf(iov
, iov_cnt
, 0, &macs
[in_use
* ETH_ALEN
],
1085 mac_data
.entries
* ETH_ALEN
);
1086 if (s
!= mac_data
.entries
* ETH_ALEN
) {
1089 in_use
+= mac_data
.entries
;
1094 n
->mac_table
.in_use
= in_use
;
1095 n
->mac_table
.first_multi
= first_multi
;
1096 n
->mac_table
.uni_overflow
= uni_overflow
;
1097 n
->mac_table
.multi_overflow
= multi_overflow
;
1098 memcpy(n
->mac_table
.macs
, macs
, MAC_TABLE_ENTRIES
* ETH_ALEN
);
1100 rxfilter_notify(nc
);
1102 return VIRTIO_NET_OK
;
1106 return VIRTIO_NET_ERR
;
1109 static int virtio_net_handle_vlan_table(VirtIONet
*n
, uint8_t cmd
,
1110 struct iovec
*iov
, unsigned int iov_cnt
)
1112 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
1115 NetClientState
*nc
= qemu_get_queue(n
->nic
);
1117 s
= iov_to_buf(iov
, iov_cnt
, 0, &vid
, sizeof(vid
));
1118 vid
= virtio_lduw_p(vdev
, &vid
);
1119 if (s
!= sizeof(vid
)) {
1120 return VIRTIO_NET_ERR
;
1123 if (vid
>= MAX_VLAN
)
1124 return VIRTIO_NET_ERR
;
1126 if (cmd
== VIRTIO_NET_CTRL_VLAN_ADD
)
1127 n
->vlans
[vid
>> 5] |= (1U << (vid
& 0x1f));
1128 else if (cmd
== VIRTIO_NET_CTRL_VLAN_DEL
)
1129 n
->vlans
[vid
>> 5] &= ~(1U << (vid
& 0x1f));
1131 return VIRTIO_NET_ERR
;
1133 rxfilter_notify(nc
);
1135 return VIRTIO_NET_OK
;
1138 static int virtio_net_handle_announce(VirtIONet
*n
, uint8_t cmd
,
1139 struct iovec
*iov
, unsigned int iov_cnt
)
1141 trace_virtio_net_handle_announce(n
->announce_timer
.round
);
1142 if (cmd
== VIRTIO_NET_CTRL_ANNOUNCE_ACK
&&
1143 n
->status
& VIRTIO_NET_S_ANNOUNCE
) {
1144 n
->status
&= ~VIRTIO_NET_S_ANNOUNCE
;
1145 if (n
->announce_timer
.round
) {
1146 qemu_announce_timer_step(&n
->announce_timer
);
1148 return VIRTIO_NET_OK
;
1150 return VIRTIO_NET_ERR
;
1154 static void virtio_net_disable_rss(VirtIONet
*n
)
1156 if (n
->rss_data
.enabled
) {
1157 trace_virtio_net_rss_disable();
1159 n
->rss_data
.enabled
= false;
1162 static uint16_t virtio_net_handle_rss(VirtIONet
*n
,
1164 unsigned int iov_cnt
,
1167 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
1168 struct virtio_net_rss_config cfg
;
1169 size_t s
, offset
= 0, size_get
;
1175 const char *err_msg
= "";
1176 uint32_t err_value
= 0;
1178 if (do_rss
&& !virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_RSS
)) {
1179 err_msg
= "RSS is not negotiated";
1182 if (!do_rss
&& !virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_HASH_REPORT
)) {
1183 err_msg
= "Hash report is not negotiated";
1186 size_get
= offsetof(struct virtio_net_rss_config
, indirection_table
);
1187 s
= iov_to_buf(iov
, iov_cnt
, offset
, &cfg
, size_get
);
1188 if (s
!= size_get
) {
1189 err_msg
= "Short command buffer";
1190 err_value
= (uint32_t)s
;
1193 n
->rss_data
.hash_types
= virtio_ldl_p(vdev
, &cfg
.hash_types
);
1194 n
->rss_data
.indirections_len
=
1195 virtio_lduw_p(vdev
, &cfg
.indirection_table_mask
);
1196 n
->rss_data
.indirections_len
++;
1198 n
->rss_data
.indirections_len
= 1;
1200 if (!is_power_of_2(n
->rss_data
.indirections_len
)) {
1201 err_msg
= "Invalid size of indirection table";
1202 err_value
= n
->rss_data
.indirections_len
;
1205 if (n
->rss_data
.indirections_len
> VIRTIO_NET_RSS_MAX_TABLE_LEN
) {
1206 err_msg
= "Too large indirection table";
1207 err_value
= n
->rss_data
.indirections_len
;
1210 n
->rss_data
.default_queue
= do_rss
?
1211 virtio_lduw_p(vdev
, &cfg
.unclassified_queue
) : 0;
1212 if (n
->rss_data
.default_queue
>= n
->max_queues
) {
1213 err_msg
= "Invalid default queue";
1214 err_value
= n
->rss_data
.default_queue
;
1218 size_get
= sizeof(uint16_t) * n
->rss_data
.indirections_len
;
1219 g_free(n
->rss_data
.indirections_table
);
1220 n
->rss_data
.indirections_table
= g_malloc(size_get
);
1221 if (!n
->rss_data
.indirections_table
) {
1222 err_msg
= "Can't allocate indirections table";
1223 err_value
= n
->rss_data
.indirections_len
;
1226 s
= iov_to_buf(iov
, iov_cnt
, offset
,
1227 n
->rss_data
.indirections_table
, size_get
);
1228 if (s
!= size_get
) {
1229 err_msg
= "Short indirection table buffer";
1230 err_value
= (uint32_t)s
;
1233 for (i
= 0; i
< n
->rss_data
.indirections_len
; ++i
) {
1234 uint16_t val
= n
->rss_data
.indirections_table
[i
];
1235 n
->rss_data
.indirections_table
[i
] = virtio_lduw_p(vdev
, &val
);
1238 size_get
= sizeof(temp
);
1239 s
= iov_to_buf(iov
, iov_cnt
, offset
, &temp
, size_get
);
1240 if (s
!= size_get
) {
1241 err_msg
= "Can't get queues";
1242 err_value
= (uint32_t)s
;
1245 queues
= do_rss
? virtio_lduw_p(vdev
, &temp
.us
) : n
->curr_queues
;
1246 if (queues
== 0 || queues
> n
->max_queues
) {
1247 err_msg
= "Invalid number of queues";
1251 if (temp
.b
> VIRTIO_NET_RSS_MAX_KEY_SIZE
) {
1252 err_msg
= "Invalid key size";
1256 if (!temp
.b
&& n
->rss_data
.hash_types
) {
1257 err_msg
= "No key provided";
1261 if (!temp
.b
&& !n
->rss_data
.hash_types
) {
1262 virtio_net_disable_rss(n
);
1267 s
= iov_to_buf(iov
, iov_cnt
, offset
, n
->rss_data
.key
, size_get
);
1268 if (s
!= size_get
) {
1269 err_msg
= "Can get key buffer";
1270 err_value
= (uint32_t)s
;
1273 n
->rss_data
.enabled
= true;
1274 trace_virtio_net_rss_enable(n
->rss_data
.hash_types
,
1275 n
->rss_data
.indirections_len
,
1279 trace_virtio_net_rss_error(err_msg
, err_value
);
1280 virtio_net_disable_rss(n
);
1284 static int virtio_net_handle_mq(VirtIONet
*n
, uint8_t cmd
,
1285 struct iovec
*iov
, unsigned int iov_cnt
)
1287 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
1290 virtio_net_disable_rss(n
);
1291 if (cmd
== VIRTIO_NET_CTRL_MQ_HASH_CONFIG
) {
1292 queues
= virtio_net_handle_rss(n
, iov
, iov_cnt
, false);
1293 return queues
? VIRTIO_NET_OK
: VIRTIO_NET_ERR
;
1295 if (cmd
== VIRTIO_NET_CTRL_MQ_RSS_CONFIG
) {
1296 queues
= virtio_net_handle_rss(n
, iov
, iov_cnt
, true);
1297 } else if (cmd
== VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
) {
1298 struct virtio_net_ctrl_mq mq
;
1300 if (!virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_MQ
)) {
1301 return VIRTIO_NET_ERR
;
1303 s
= iov_to_buf(iov
, iov_cnt
, 0, &mq
, sizeof(mq
));
1304 if (s
!= sizeof(mq
)) {
1305 return VIRTIO_NET_ERR
;
1307 queues
= virtio_lduw_p(vdev
, &mq
.virtqueue_pairs
);
1310 return VIRTIO_NET_ERR
;
1313 if (queues
< VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN
||
1314 queues
> VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX
||
1315 queues
> n
->max_queues
||
1317 return VIRTIO_NET_ERR
;
1320 n
->curr_queues
= queues
;
1321 /* stop the backend before changing the number of queues to avoid handling a
1323 virtio_net_set_status(vdev
, vdev
->status
);
1324 virtio_net_set_queues(n
);
1326 return VIRTIO_NET_OK
;
1329 static void virtio_net_handle_ctrl(VirtIODevice
*vdev
, VirtQueue
*vq
)
1331 VirtIONet
*n
= VIRTIO_NET(vdev
);
1332 struct virtio_net_ctrl_hdr ctrl
;
1333 virtio_net_ctrl_ack status
= VIRTIO_NET_ERR
;
1334 VirtQueueElement
*elem
;
1336 struct iovec
*iov
, *iov2
;
1337 unsigned int iov_cnt
;
1340 elem
= virtqueue_pop(vq
, sizeof(VirtQueueElement
));
1344 if (iov_size(elem
->in_sg
, elem
->in_num
) < sizeof(status
) ||
1345 iov_size(elem
->out_sg
, elem
->out_num
) < sizeof(ctrl
)) {
1346 virtio_error(vdev
, "virtio-net ctrl missing headers");
1347 virtqueue_detach_element(vq
, elem
, 0);
1352 iov_cnt
= elem
->out_num
;
1353 iov2
= iov
= g_memdup(elem
->out_sg
, sizeof(struct iovec
) * elem
->out_num
);
1354 s
= iov_to_buf(iov
, iov_cnt
, 0, &ctrl
, sizeof(ctrl
));
1355 iov_discard_front(&iov
, &iov_cnt
, sizeof(ctrl
));
1356 if (s
!= sizeof(ctrl
)) {
1357 status
= VIRTIO_NET_ERR
;
1358 } else if (ctrl
.class == VIRTIO_NET_CTRL_RX
) {
1359 status
= virtio_net_handle_rx_mode(n
, ctrl
.cmd
, iov
, iov_cnt
);
1360 } else if (ctrl
.class == VIRTIO_NET_CTRL_MAC
) {
1361 status
= virtio_net_handle_mac(n
, ctrl
.cmd
, iov
, iov_cnt
);
1362 } else if (ctrl
.class == VIRTIO_NET_CTRL_VLAN
) {
1363 status
= virtio_net_handle_vlan_table(n
, ctrl
.cmd
, iov
, iov_cnt
);
1364 } else if (ctrl
.class == VIRTIO_NET_CTRL_ANNOUNCE
) {
1365 status
= virtio_net_handle_announce(n
, ctrl
.cmd
, iov
, iov_cnt
);
1366 } else if (ctrl
.class == VIRTIO_NET_CTRL_MQ
) {
1367 status
= virtio_net_handle_mq(n
, ctrl
.cmd
, iov
, iov_cnt
);
1368 } else if (ctrl
.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS
) {
1369 status
= virtio_net_handle_offloads(n
, ctrl
.cmd
, iov
, iov_cnt
);
1372 s
= iov_from_buf(elem
->in_sg
, elem
->in_num
, 0, &status
, sizeof(status
));
1373 assert(s
== sizeof(status
));
1375 virtqueue_push(vq
, elem
, sizeof(status
));
1376 virtio_notify(vdev
, vq
);
1384 static void virtio_net_handle_rx(VirtIODevice
*vdev
, VirtQueue
*vq
)
1386 VirtIONet
*n
= VIRTIO_NET(vdev
);
1387 int queue_index
= vq2q(virtio_get_queue_index(vq
));
1389 qemu_flush_queued_packets(qemu_get_subqueue(n
->nic
, queue_index
));
1392 static bool virtio_net_can_receive(NetClientState
*nc
)
1394 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
1395 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
1396 VirtIONetQueue
*q
= virtio_net_get_subqueue(nc
);
1398 if (!vdev
->vm_running
) {
1402 if (nc
->queue_index
>= n
->curr_queues
) {
1406 if (!virtio_queue_ready(q
->rx_vq
) ||
1407 !(vdev
->status
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
1414 static int virtio_net_has_buffers(VirtIONetQueue
*q
, int bufsize
)
1416 VirtIONet
*n
= q
->n
;
1417 if (virtio_queue_empty(q
->rx_vq
) ||
1418 (n
->mergeable_rx_bufs
&&
1419 !virtqueue_avail_bytes(q
->rx_vq
, bufsize
, 0))) {
1420 virtio_queue_set_notification(q
->rx_vq
, 1);
1422 /* To avoid a race condition where the guest has made some buffers
1423 * available after the above check but before notification was
1424 * enabled, check for available buffers again.
1426 if (virtio_queue_empty(q
->rx_vq
) ||
1427 (n
->mergeable_rx_bufs
&&
1428 !virtqueue_avail_bytes(q
->rx_vq
, bufsize
, 0))) {
1433 virtio_queue_set_notification(q
->rx_vq
, 0);
1437 static void virtio_net_hdr_swap(VirtIODevice
*vdev
, struct virtio_net_hdr
*hdr
)
1439 virtio_tswap16s(vdev
, &hdr
->hdr_len
);
1440 virtio_tswap16s(vdev
, &hdr
->gso_size
);
1441 virtio_tswap16s(vdev
, &hdr
->csum_start
);
1442 virtio_tswap16s(vdev
, &hdr
->csum_offset
);
1445 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
1446 * it never finds out that the packets don't have valid checksums. This
1447 * causes dhclient to get upset. Fedora's carried a patch for ages to
1448 * fix this with Xen but it hasn't appeared in an upstream release of
1451 * To avoid breaking existing guests, we catch udp packets and add
1452 * checksums. This is terrible but it's better than hacking the guest
1455 * N.B. if we introduce a zero-copy API, this operation is no longer free so
1456 * we should provide a mechanism to disable it to avoid polluting the host
1459 static void work_around_broken_dhclient(struct virtio_net_hdr
*hdr
,
1460 uint8_t *buf
, size_t size
)
1462 if ((hdr
->flags
& VIRTIO_NET_HDR_F_NEEDS_CSUM
) && /* missing csum */
1463 (size
> 27 && size
< 1500) && /* normal sized MTU */
1464 (buf
[12] == 0x08 && buf
[13] == 0x00) && /* ethertype == IPv4 */
1465 (buf
[23] == 17) && /* ip.protocol == UDP */
1466 (buf
[34] == 0 && buf
[35] == 67)) { /* udp.srcport == bootps */
1467 net_checksum_calculate(buf
, size
);
1468 hdr
->flags
&= ~VIRTIO_NET_HDR_F_NEEDS_CSUM
;
1472 static void receive_header(VirtIONet
*n
, const struct iovec
*iov
, int iov_cnt
,
1473 const void *buf
, size_t size
)
1475 if (n
->has_vnet_hdr
) {
1476 /* FIXME this cast is evil */
1477 void *wbuf
= (void *)buf
;
1478 work_around_broken_dhclient(wbuf
, wbuf
+ n
->host_hdr_len
,
1479 size
- n
->host_hdr_len
);
1481 if (n
->needs_vnet_hdr_swap
) {
1482 virtio_net_hdr_swap(VIRTIO_DEVICE(n
), wbuf
);
1484 iov_from_buf(iov
, iov_cnt
, 0, buf
, sizeof(struct virtio_net_hdr
));
1486 struct virtio_net_hdr hdr
= {
1488 .gso_type
= VIRTIO_NET_HDR_GSO_NONE
1490 iov_from_buf(iov
, iov_cnt
, 0, &hdr
, sizeof hdr
);
1494 static int receive_filter(VirtIONet
*n
, const uint8_t *buf
, int size
)
1496 static const uint8_t bcast
[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1497 static const uint8_t vlan
[] = {0x81, 0x00};
1498 uint8_t *ptr
= (uint8_t *)buf
;
1504 ptr
+= n
->host_hdr_len
;
1506 if (!memcmp(&ptr
[12], vlan
, sizeof(vlan
))) {
1507 int vid
= lduw_be_p(ptr
+ 14) & 0xfff;
1508 if (!(n
->vlans
[vid
>> 5] & (1U << (vid
& 0x1f))))
1512 if (ptr
[0] & 1) { // multicast
1513 if (!memcmp(ptr
, bcast
, sizeof(bcast
))) {
1515 } else if (n
->nomulti
) {
1517 } else if (n
->allmulti
|| n
->mac_table
.multi_overflow
) {
1521 for (i
= n
->mac_table
.first_multi
; i
< n
->mac_table
.in_use
; i
++) {
1522 if (!memcmp(ptr
, &n
->mac_table
.macs
[i
* ETH_ALEN
], ETH_ALEN
)) {
1529 } else if (n
->alluni
|| n
->mac_table
.uni_overflow
) {
1531 } else if (!memcmp(ptr
, n
->mac
, ETH_ALEN
)) {
1535 for (i
= 0; i
< n
->mac_table
.first_multi
; i
++) {
1536 if (!memcmp(ptr
, &n
->mac_table
.macs
[i
* ETH_ALEN
], ETH_ALEN
)) {
1545 static uint8_t virtio_net_get_hash_type(bool isip4
,
1552 if (istcp
&& (types
& VIRTIO_NET_RSS_HASH_TYPE_TCPv4
)) {
1553 return NetPktRssIpV4Tcp
;
1555 if (isudp
&& (types
& VIRTIO_NET_RSS_HASH_TYPE_UDPv4
)) {
1556 return NetPktRssIpV4Udp
;
1558 if (types
& VIRTIO_NET_RSS_HASH_TYPE_IPv4
) {
1559 return NetPktRssIpV4
;
1562 uint32_t mask
= VIRTIO_NET_RSS_HASH_TYPE_TCP_EX
|
1563 VIRTIO_NET_RSS_HASH_TYPE_TCPv6
;
1565 if (istcp
&& (types
& mask
)) {
1566 return (types
& VIRTIO_NET_RSS_HASH_TYPE_TCP_EX
) ?
1567 NetPktRssIpV6TcpEx
: NetPktRssIpV6Tcp
;
1569 mask
= VIRTIO_NET_RSS_HASH_TYPE_UDP_EX
| VIRTIO_NET_RSS_HASH_TYPE_UDPv6
;
1570 if (isudp
&& (types
& mask
)) {
1571 return (types
& VIRTIO_NET_RSS_HASH_TYPE_UDP_EX
) ?
1572 NetPktRssIpV6UdpEx
: NetPktRssIpV6Udp
;
1574 mask
= VIRTIO_NET_RSS_HASH_TYPE_IP_EX
| VIRTIO_NET_RSS_HASH_TYPE_IPv6
;
1576 return (types
& VIRTIO_NET_RSS_HASH_TYPE_IP_EX
) ?
1577 NetPktRssIpV6Ex
: NetPktRssIpV6
;
1583 static void virtio_set_packet_hash(const uint8_t *buf
, uint8_t report
,
1586 struct virtio_net_hdr_v1_hash
*hdr
= (void *)buf
;
1587 hdr
->hash_value
= hash
;
1588 hdr
->hash_report
= report
;
1591 static int virtio_net_process_rss(NetClientState
*nc
, const uint8_t *buf
,
1594 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
1595 unsigned int index
= nc
->queue_index
, new_index
= index
;
1596 struct NetRxPkt
*pkt
= n
->rx_pkt
;
1597 uint8_t net_hash_type
;
1599 bool isip4
, isip6
, isudp
, istcp
;
1600 static const uint8_t reports
[NetPktRssIpV6UdpEx
+ 1] = {
1601 VIRTIO_NET_HASH_REPORT_IPv4
,
1602 VIRTIO_NET_HASH_REPORT_TCPv4
,
1603 VIRTIO_NET_HASH_REPORT_TCPv6
,
1604 VIRTIO_NET_HASH_REPORT_IPv6
,
1605 VIRTIO_NET_HASH_REPORT_IPv6_EX
,
1606 VIRTIO_NET_HASH_REPORT_TCPv6_EX
,
1607 VIRTIO_NET_HASH_REPORT_UDPv4
,
1608 VIRTIO_NET_HASH_REPORT_UDPv6
,
1609 VIRTIO_NET_HASH_REPORT_UDPv6_EX
1612 net_rx_pkt_set_protocols(pkt
, buf
+ n
->host_hdr_len
,
1613 size
- n
->host_hdr_len
);
1614 net_rx_pkt_get_protocols(pkt
, &isip4
, &isip6
, &isudp
, &istcp
);
1615 if (isip4
&& (net_rx_pkt_get_ip4_info(pkt
)->fragment
)) {
1616 istcp
= isudp
= false;
1618 if (isip6
&& (net_rx_pkt_get_ip6_info(pkt
)->fragment
)) {
1619 istcp
= isudp
= false;
1621 net_hash_type
= virtio_net_get_hash_type(isip4
, isip6
, isudp
, istcp
,
1622 n
->rss_data
.hash_types
);
1623 if (net_hash_type
> NetPktRssIpV6UdpEx
) {
1624 if (n
->rss_data
.populate_hash
) {
1625 virtio_set_packet_hash(buf
, VIRTIO_NET_HASH_REPORT_NONE
, 0);
1627 return n
->rss_data
.redirect
? n
->rss_data
.default_queue
: -1;
1630 hash
= net_rx_pkt_calc_rss_hash(pkt
, net_hash_type
, n
->rss_data
.key
);
1632 if (n
->rss_data
.populate_hash
) {
1633 virtio_set_packet_hash(buf
, reports
[net_hash_type
], hash
);
1636 if (n
->rss_data
.redirect
) {
1637 new_index
= hash
& (n
->rss_data
.indirections_len
- 1);
1638 new_index
= n
->rss_data
.indirections_table
[new_index
];
1641 return (index
== new_index
) ? -1 : new_index
;
1644 static ssize_t
virtio_net_receive_rcu(NetClientState
*nc
, const uint8_t *buf
,
1645 size_t size
, bool no_rss
)
1647 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
1648 VirtIONetQueue
*q
= virtio_net_get_subqueue(nc
);
1649 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
1650 struct iovec mhdr_sg
[VIRTQUEUE_MAX_SIZE
];
1651 struct virtio_net_hdr_mrg_rxbuf mhdr
;
1652 unsigned mhdr_cnt
= 0;
1653 size_t offset
, i
, guest_offset
;
1655 if (!virtio_net_can_receive(nc
)) {
1659 if (!no_rss
&& n
->rss_data
.enabled
) {
1660 int index
= virtio_net_process_rss(nc
, buf
, size
);
1662 NetClientState
*nc2
= qemu_get_subqueue(n
->nic
, index
);
1663 return virtio_net_receive_rcu(nc2
, buf
, size
, true);
1667 /* hdr_len refers to the header we supply to the guest */
1668 if (!virtio_net_has_buffers(q
, size
+ n
->guest_hdr_len
- n
->host_hdr_len
)) {
1672 if (!receive_filter(n
, buf
, size
))
1677 while (offset
< size
) {
1678 VirtQueueElement
*elem
;
1680 const struct iovec
*sg
;
1684 elem
= virtqueue_pop(q
->rx_vq
, sizeof(VirtQueueElement
));
1687 virtio_error(vdev
, "virtio-net unexpected empty queue: "
1688 "i %zd mergeable %d offset %zd, size %zd, "
1689 "guest hdr len %zd, host hdr len %zd "
1690 "guest features 0x%" PRIx64
,
1691 i
, n
->mergeable_rx_bufs
, offset
, size
,
1692 n
->guest_hdr_len
, n
->host_hdr_len
,
1693 vdev
->guest_features
);
1698 if (elem
->in_num
< 1) {
1700 "virtio-net receive queue contains no in buffers");
1701 virtqueue_detach_element(q
->rx_vq
, elem
, 0);
1708 assert(offset
== 0);
1709 if (n
->mergeable_rx_bufs
) {
1710 mhdr_cnt
= iov_copy(mhdr_sg
, ARRAY_SIZE(mhdr_sg
),
1712 offsetof(typeof(mhdr
), num_buffers
),
1713 sizeof(mhdr
.num_buffers
));
1716 receive_header(n
, sg
, elem
->in_num
, buf
, size
);
1717 if (n
->rss_data
.populate_hash
) {
1718 offset
= sizeof(mhdr
);
1719 iov_from_buf(sg
, elem
->in_num
, offset
,
1720 buf
+ offset
, n
->host_hdr_len
- sizeof(mhdr
));
1722 offset
= n
->host_hdr_len
;
1723 total
+= n
->guest_hdr_len
;
1724 guest_offset
= n
->guest_hdr_len
;
1729 /* copy in packet. ugh */
1730 len
= iov_from_buf(sg
, elem
->in_num
, guest_offset
,
1731 buf
+ offset
, size
- offset
);
1734 /* If buffers can't be merged, at this point we
1735 * must have consumed the complete packet.
1736 * Otherwise, drop it. */
1737 if (!n
->mergeable_rx_bufs
&& offset
< size
) {
1738 virtqueue_unpop(q
->rx_vq
, elem
, total
);
1743 /* signal other side */
1744 virtqueue_fill(q
->rx_vq
, elem
, total
, i
++);
1749 virtio_stw_p(vdev
, &mhdr
.num_buffers
, i
);
1750 iov_from_buf(mhdr_sg
, mhdr_cnt
,
1752 &mhdr
.num_buffers
, sizeof mhdr
.num_buffers
);
1755 virtqueue_flush(q
->rx_vq
, i
);
1756 virtio_notify(vdev
, q
->rx_vq
);
1761 static ssize_t
virtio_net_do_receive(NetClientState
*nc
, const uint8_t *buf
,
1764 RCU_READ_LOCK_GUARD();
1766 return virtio_net_receive_rcu(nc
, buf
, size
, false);
1769 static void virtio_net_rsc_extract_unit4(VirtioNetRscChain
*chain
,
1771 VirtioNetRscUnit
*unit
)
1774 struct ip_header
*ip
;
1776 ip
= (struct ip_header
*)(buf
+ chain
->n
->guest_hdr_len
1777 + sizeof(struct eth_header
));
1778 unit
->ip
= (void *)ip
;
1779 ip_hdrlen
= (ip
->ip_ver_len
& 0xF) << 2;
1780 unit
->ip_plen
= &ip
->ip_len
;
1781 unit
->tcp
= (struct tcp_header
*)(((uint8_t *)unit
->ip
) + ip_hdrlen
);
1782 unit
->tcp_hdrlen
= (htons(unit
->tcp
->th_offset_flags
) & 0xF000) >> 10;
1783 unit
->payload
= htons(*unit
->ip_plen
) - ip_hdrlen
- unit
->tcp_hdrlen
;
1786 static void virtio_net_rsc_extract_unit6(VirtioNetRscChain
*chain
,
1788 VirtioNetRscUnit
*unit
)
1790 struct ip6_header
*ip6
;
1792 ip6
= (struct ip6_header
*)(buf
+ chain
->n
->guest_hdr_len
1793 + sizeof(struct eth_header
));
1795 unit
->ip_plen
= &(ip6
->ip6_ctlun
.ip6_un1
.ip6_un1_plen
);
1796 unit
->tcp
= (struct tcp_header
*)(((uint8_t *)unit
->ip
)
1797 + sizeof(struct ip6_header
));
1798 unit
->tcp_hdrlen
= (htons(unit
->tcp
->th_offset_flags
) & 0xF000) >> 10;
1800 /* There is a difference between payload lenght in ipv4 and v6,
1801 ip header is excluded in ipv6 */
1802 unit
->payload
= htons(*unit
->ip_plen
) - unit
->tcp_hdrlen
;
1805 static size_t virtio_net_rsc_drain_seg(VirtioNetRscChain
*chain
,
1806 VirtioNetRscSeg
*seg
)
1809 struct virtio_net_hdr_v1
*h
;
1811 h
= (struct virtio_net_hdr_v1
*)seg
->buf
;
1813 h
->gso_type
= VIRTIO_NET_HDR_GSO_NONE
;
1815 if (seg
->is_coalesced
) {
1816 h
->rsc
.segments
= seg
->packets
;
1817 h
->rsc
.dup_acks
= seg
->dup_ack
;
1818 h
->flags
= VIRTIO_NET_HDR_F_RSC_INFO
;
1819 if (chain
->proto
== ETH_P_IP
) {
1820 h
->gso_type
= VIRTIO_NET_HDR_GSO_TCPV4
;
1822 h
->gso_type
= VIRTIO_NET_HDR_GSO_TCPV6
;
1826 ret
= virtio_net_do_receive(seg
->nc
, seg
->buf
, seg
->size
);
1827 QTAILQ_REMOVE(&chain
->buffers
, seg
, next
);
1834 static void virtio_net_rsc_purge(void *opq
)
1836 VirtioNetRscSeg
*seg
, *rn
;
1837 VirtioNetRscChain
*chain
= (VirtioNetRscChain
*)opq
;
1839 QTAILQ_FOREACH_SAFE(seg
, &chain
->buffers
, next
, rn
) {
1840 if (virtio_net_rsc_drain_seg(chain
, seg
) == 0) {
1841 chain
->stat
.purge_failed
++;
1846 chain
->stat
.timer
++;
1847 if (!QTAILQ_EMPTY(&chain
->buffers
)) {
1848 timer_mod(chain
->drain_timer
,
1849 qemu_clock_get_ns(QEMU_CLOCK_HOST
) + chain
->n
->rsc_timeout
);
1853 static void virtio_net_rsc_cleanup(VirtIONet
*n
)
1855 VirtioNetRscChain
*chain
, *rn_chain
;
1856 VirtioNetRscSeg
*seg
, *rn_seg
;
1858 QTAILQ_FOREACH_SAFE(chain
, &n
->rsc_chains
, next
, rn_chain
) {
1859 QTAILQ_FOREACH_SAFE(seg
, &chain
->buffers
, next
, rn_seg
) {
1860 QTAILQ_REMOVE(&chain
->buffers
, seg
, next
);
1865 timer_free(chain
->drain_timer
);
1866 QTAILQ_REMOVE(&n
->rsc_chains
, chain
, next
);
1871 static void virtio_net_rsc_cache_buf(VirtioNetRscChain
*chain
,
1873 const uint8_t *buf
, size_t size
)
1876 VirtioNetRscSeg
*seg
;
1878 hdr_len
= chain
->n
->guest_hdr_len
;
1879 seg
= g_malloc(sizeof(VirtioNetRscSeg
));
1880 seg
->buf
= g_malloc(hdr_len
+ sizeof(struct eth_header
)
1881 + sizeof(struct ip6_header
) + VIRTIO_NET_MAX_TCP_PAYLOAD
);
1882 memcpy(seg
->buf
, buf
, size
);
1886 seg
->is_coalesced
= 0;
1889 QTAILQ_INSERT_TAIL(&chain
->buffers
, seg
, next
);
1890 chain
->stat
.cache
++;
1892 switch (chain
->proto
) {
1894 virtio_net_rsc_extract_unit4(chain
, seg
->buf
, &seg
->unit
);
1897 virtio_net_rsc_extract_unit6(chain
, seg
->buf
, &seg
->unit
);
1900 g_assert_not_reached();
1904 static int32_t virtio_net_rsc_handle_ack(VirtioNetRscChain
*chain
,
1905 VirtioNetRscSeg
*seg
,
1907 struct tcp_header
*n_tcp
,
1908 struct tcp_header
*o_tcp
)
1910 uint32_t nack
, oack
;
1911 uint16_t nwin
, owin
;
1913 nack
= htonl(n_tcp
->th_ack
);
1914 nwin
= htons(n_tcp
->th_win
);
1915 oack
= htonl(o_tcp
->th_ack
);
1916 owin
= htons(o_tcp
->th_win
);
1918 if ((nack
- oack
) >= VIRTIO_NET_MAX_TCP_PAYLOAD
) {
1919 chain
->stat
.ack_out_of_win
++;
1921 } else if (nack
== oack
) {
1922 /* duplicated ack or window probe */
1924 /* duplicated ack, add dup ack count due to whql test up to 1 */
1925 chain
->stat
.dup_ack
++;
1928 /* Coalesce window update */
1929 o_tcp
->th_win
= n_tcp
->th_win
;
1930 chain
->stat
.win_update
++;
1931 return RSC_COALESCE
;
1934 /* pure ack, go to 'C', finalize*/
1935 chain
->stat
.pure_ack
++;
1940 static int32_t virtio_net_rsc_coalesce_data(VirtioNetRscChain
*chain
,
1941 VirtioNetRscSeg
*seg
,
1943 VirtioNetRscUnit
*n_unit
)
1947 uint32_t nseq
, oseq
;
1948 VirtioNetRscUnit
*o_unit
;
1950 o_unit
= &seg
->unit
;
1951 o_ip_len
= htons(*o_unit
->ip_plen
);
1952 nseq
= htonl(n_unit
->tcp
->th_seq
);
1953 oseq
= htonl(o_unit
->tcp
->th_seq
);
1955 /* out of order or retransmitted. */
1956 if ((nseq
- oseq
) > VIRTIO_NET_MAX_TCP_PAYLOAD
) {
1957 chain
->stat
.data_out_of_win
++;
1961 data
= ((uint8_t *)n_unit
->tcp
) + n_unit
->tcp_hdrlen
;
1963 if ((o_unit
->payload
== 0) && n_unit
->payload
) {
1964 /* From no payload to payload, normal case, not a dup ack or etc */
1965 chain
->stat
.data_after_pure_ack
++;
1968 return virtio_net_rsc_handle_ack(chain
, seg
, buf
,
1969 n_unit
->tcp
, o_unit
->tcp
);
1971 } else if ((nseq
- oseq
) != o_unit
->payload
) {
1972 /* Not a consistent packet, out of order */
1973 chain
->stat
.data_out_of_order
++;
1977 if ((o_ip_len
+ n_unit
->payload
) > chain
->max_payload
) {
1978 chain
->stat
.over_size
++;
1982 /* Here comes the right data, the payload length in v4/v6 is different,
1983 so use the field value to update and record the new data len */
1984 o_unit
->payload
+= n_unit
->payload
; /* update new data len */
1986 /* update field in ip header */
1987 *o_unit
->ip_plen
= htons(o_ip_len
+ n_unit
->payload
);
1989 /* Bring 'PUSH' big, the whql test guide says 'PUSH' can be coalesced
1990 for windows guest, while this may change the behavior for linux
1991 guest (only if it uses RSC feature). */
1992 o_unit
->tcp
->th_offset_flags
= n_unit
->tcp
->th_offset_flags
;
1994 o_unit
->tcp
->th_ack
= n_unit
->tcp
->th_ack
;
1995 o_unit
->tcp
->th_win
= n_unit
->tcp
->th_win
;
1997 memmove(seg
->buf
+ seg
->size
, data
, n_unit
->payload
);
1998 seg
->size
+= n_unit
->payload
;
2000 chain
->stat
.coalesced
++;
2001 return RSC_COALESCE
;
2005 static int32_t virtio_net_rsc_coalesce4(VirtioNetRscChain
*chain
,
2006 VirtioNetRscSeg
*seg
,
2007 const uint8_t *buf
, size_t size
,
2008 VirtioNetRscUnit
*unit
)
2010 struct ip_header
*ip1
, *ip2
;
2012 ip1
= (struct ip_header
*)(unit
->ip
);
2013 ip2
= (struct ip_header
*)(seg
->unit
.ip
);
2014 if ((ip1
->ip_src
^ ip2
->ip_src
) || (ip1
->ip_dst
^ ip2
->ip_dst
)
2015 || (unit
->tcp
->th_sport
^ seg
->unit
.tcp
->th_sport
)
2016 || (unit
->tcp
->th_dport
^ seg
->unit
.tcp
->th_dport
)) {
2017 chain
->stat
.no_match
++;
2018 return RSC_NO_MATCH
;
2021 return virtio_net_rsc_coalesce_data(chain
, seg
, buf
, unit
);
2024 static int32_t virtio_net_rsc_coalesce6(VirtioNetRscChain
*chain
,
2025 VirtioNetRscSeg
*seg
,
2026 const uint8_t *buf
, size_t size
,
2027 VirtioNetRscUnit
*unit
)
2029 struct ip6_header
*ip1
, *ip2
;
2031 ip1
= (struct ip6_header
*)(unit
->ip
);
2032 ip2
= (struct ip6_header
*)(seg
->unit
.ip
);
2033 if (memcmp(&ip1
->ip6_src
, &ip2
->ip6_src
, sizeof(struct in6_address
))
2034 || memcmp(&ip1
->ip6_dst
, &ip2
->ip6_dst
, sizeof(struct in6_address
))
2035 || (unit
->tcp
->th_sport
^ seg
->unit
.tcp
->th_sport
)
2036 || (unit
->tcp
->th_dport
^ seg
->unit
.tcp
->th_dport
)) {
2037 chain
->stat
.no_match
++;
2038 return RSC_NO_MATCH
;
2041 return virtio_net_rsc_coalesce_data(chain
, seg
, buf
, unit
);
2044 /* Packets with 'SYN' should bypass, other flag should be sent after drain
2045 * to prevent out of order */
2046 static int virtio_net_rsc_tcp_ctrl_check(VirtioNetRscChain
*chain
,
2047 struct tcp_header
*tcp
)
2052 tcp_flag
= htons(tcp
->th_offset_flags
);
2053 tcp_hdr
= (tcp_flag
& VIRTIO_NET_TCP_HDR_LENGTH
) >> 10;
2054 tcp_flag
&= VIRTIO_NET_TCP_FLAG
;
2055 if (tcp_flag
& TH_SYN
) {
2056 chain
->stat
.tcp_syn
++;
2060 if (tcp_flag
& (TH_FIN
| TH_URG
| TH_RST
| TH_ECE
| TH_CWR
)) {
2061 chain
->stat
.tcp_ctrl_drain
++;
2065 if (tcp_hdr
> sizeof(struct tcp_header
)) {
2066 chain
->stat
.tcp_all_opt
++;
2070 return RSC_CANDIDATE
;
2073 static size_t virtio_net_rsc_do_coalesce(VirtioNetRscChain
*chain
,
2075 const uint8_t *buf
, size_t size
,
2076 VirtioNetRscUnit
*unit
)
2079 VirtioNetRscSeg
*seg
, *nseg
;
2081 if (QTAILQ_EMPTY(&chain
->buffers
)) {
2082 chain
->stat
.empty_cache
++;
2083 virtio_net_rsc_cache_buf(chain
, nc
, buf
, size
);
2084 timer_mod(chain
->drain_timer
,
2085 qemu_clock_get_ns(QEMU_CLOCK_HOST
) + chain
->n
->rsc_timeout
);
2089 QTAILQ_FOREACH_SAFE(seg
, &chain
->buffers
, next
, nseg
) {
2090 if (chain
->proto
== ETH_P_IP
) {
2091 ret
= virtio_net_rsc_coalesce4(chain
, seg
, buf
, size
, unit
);
2093 ret
= virtio_net_rsc_coalesce6(chain
, seg
, buf
, size
, unit
);
2096 if (ret
== RSC_FINAL
) {
2097 if (virtio_net_rsc_drain_seg(chain
, seg
) == 0) {
2099 chain
->stat
.final_failed
++;
2103 /* Send current packet */
2104 return virtio_net_do_receive(nc
, buf
, size
);
2105 } else if (ret
== RSC_NO_MATCH
) {
2108 /* Coalesced, mark coalesced flag to tell calc cksum for ipv4 */
2109 seg
->is_coalesced
= 1;
2114 chain
->stat
.no_match_cache
++;
2115 virtio_net_rsc_cache_buf(chain
, nc
, buf
, size
);
2119 /* Drain a connection data, this is to avoid out of order segments */
2120 static size_t virtio_net_rsc_drain_flow(VirtioNetRscChain
*chain
,
2122 const uint8_t *buf
, size_t size
,
2123 uint16_t ip_start
, uint16_t ip_size
,
2126 VirtioNetRscSeg
*seg
, *nseg
;
2127 uint32_t ppair1
, ppair2
;
2129 ppair1
= *(uint32_t *)(buf
+ tcp_port
);
2130 QTAILQ_FOREACH_SAFE(seg
, &chain
->buffers
, next
, nseg
) {
2131 ppair2
= *(uint32_t *)(seg
->buf
+ tcp_port
);
2132 if (memcmp(buf
+ ip_start
, seg
->buf
+ ip_start
, ip_size
)
2133 || (ppair1
!= ppair2
)) {
2136 if (virtio_net_rsc_drain_seg(chain
, seg
) == 0) {
2137 chain
->stat
.drain_failed
++;
2143 return virtio_net_do_receive(nc
, buf
, size
);
2146 static int32_t virtio_net_rsc_sanity_check4(VirtioNetRscChain
*chain
,
2147 struct ip_header
*ip
,
2148 const uint8_t *buf
, size_t size
)
2152 /* Not an ipv4 packet */
2153 if (((ip
->ip_ver_len
& 0xF0) >> 4) != IP_HEADER_VERSION_4
) {
2154 chain
->stat
.ip_option
++;
2158 /* Don't handle packets with ip option */
2159 if ((ip
->ip_ver_len
& 0xF) != VIRTIO_NET_IP4_HEADER_LENGTH
) {
2160 chain
->stat
.ip_option
++;
2164 if (ip
->ip_p
!= IPPROTO_TCP
) {
2165 chain
->stat
.bypass_not_tcp
++;
2169 /* Don't handle packets with ip fragment */
2170 if (!(htons(ip
->ip_off
) & IP_DF
)) {
2171 chain
->stat
.ip_frag
++;
2175 /* Don't handle packets with ecn flag */
2176 if (IPTOS_ECN(ip
->ip_tos
)) {
2177 chain
->stat
.ip_ecn
++;
2181 ip_len
= htons(ip
->ip_len
);
2182 if (ip_len
< (sizeof(struct ip_header
) + sizeof(struct tcp_header
))
2183 || ip_len
> (size
- chain
->n
->guest_hdr_len
-
2184 sizeof(struct eth_header
))) {
2185 chain
->stat
.ip_hacked
++;
2189 return RSC_CANDIDATE
;
2192 static size_t virtio_net_rsc_receive4(VirtioNetRscChain
*chain
,
2194 const uint8_t *buf
, size_t size
)
2198 VirtioNetRscUnit unit
;
2200 hdr_len
= ((VirtIONet
*)(chain
->n
))->guest_hdr_len
;
2202 if (size
< (hdr_len
+ sizeof(struct eth_header
) + sizeof(struct ip_header
)
2203 + sizeof(struct tcp_header
))) {
2204 chain
->stat
.bypass_not_tcp
++;
2205 return virtio_net_do_receive(nc
, buf
, size
);
2208 virtio_net_rsc_extract_unit4(chain
, buf
, &unit
);
2209 if (virtio_net_rsc_sanity_check4(chain
, unit
.ip
, buf
, size
)
2211 return virtio_net_do_receive(nc
, buf
, size
);
2214 ret
= virtio_net_rsc_tcp_ctrl_check(chain
, unit
.tcp
);
2215 if (ret
== RSC_BYPASS
) {
2216 return virtio_net_do_receive(nc
, buf
, size
);
2217 } else if (ret
== RSC_FINAL
) {
2218 return virtio_net_rsc_drain_flow(chain
, nc
, buf
, size
,
2219 ((hdr_len
+ sizeof(struct eth_header
)) + 12),
2220 VIRTIO_NET_IP4_ADDR_SIZE
,
2221 hdr_len
+ sizeof(struct eth_header
) + sizeof(struct ip_header
));
2224 return virtio_net_rsc_do_coalesce(chain
, nc
, buf
, size
, &unit
);
2227 static int32_t virtio_net_rsc_sanity_check6(VirtioNetRscChain
*chain
,
2228 struct ip6_header
*ip6
,
2229 const uint8_t *buf
, size_t size
)
2233 if (((ip6
->ip6_ctlun
.ip6_un1
.ip6_un1_flow
& 0xF0) >> 4)
2234 != IP_HEADER_VERSION_6
) {
2238 /* Both option and protocol is checked in this */
2239 if (ip6
->ip6_ctlun
.ip6_un1
.ip6_un1_nxt
!= IPPROTO_TCP
) {
2240 chain
->stat
.bypass_not_tcp
++;
2244 ip_len
= htons(ip6
->ip6_ctlun
.ip6_un1
.ip6_un1_plen
);
2245 if (ip_len
< sizeof(struct tcp_header
) ||
2246 ip_len
> (size
- chain
->n
->guest_hdr_len
- sizeof(struct eth_header
)
2247 - sizeof(struct ip6_header
))) {
2248 chain
->stat
.ip_hacked
++;
2252 /* Don't handle packets with ecn flag */
2253 if (IP6_ECN(ip6
->ip6_ctlun
.ip6_un3
.ip6_un3_ecn
)) {
2254 chain
->stat
.ip_ecn
++;
2258 return RSC_CANDIDATE
;
2261 static size_t virtio_net_rsc_receive6(void *opq
, NetClientState
*nc
,
2262 const uint8_t *buf
, size_t size
)
2266 VirtioNetRscChain
*chain
;
2267 VirtioNetRscUnit unit
;
2269 chain
= (VirtioNetRscChain
*)opq
;
2270 hdr_len
= ((VirtIONet
*)(chain
->n
))->guest_hdr_len
;
2272 if (size
< (hdr_len
+ sizeof(struct eth_header
) + sizeof(struct ip6_header
)
2273 + sizeof(tcp_header
))) {
2274 return virtio_net_do_receive(nc
, buf
, size
);
2277 virtio_net_rsc_extract_unit6(chain
, buf
, &unit
);
2278 if (RSC_CANDIDATE
!= virtio_net_rsc_sanity_check6(chain
,
2279 unit
.ip
, buf
, size
)) {
2280 return virtio_net_do_receive(nc
, buf
, size
);
2283 ret
= virtio_net_rsc_tcp_ctrl_check(chain
, unit
.tcp
);
2284 if (ret
== RSC_BYPASS
) {
2285 return virtio_net_do_receive(nc
, buf
, size
);
2286 } else if (ret
== RSC_FINAL
) {
2287 return virtio_net_rsc_drain_flow(chain
, nc
, buf
, size
,
2288 ((hdr_len
+ sizeof(struct eth_header
)) + 8),
2289 VIRTIO_NET_IP6_ADDR_SIZE
,
2290 hdr_len
+ sizeof(struct eth_header
)
2291 + sizeof(struct ip6_header
));
2294 return virtio_net_rsc_do_coalesce(chain
, nc
, buf
, size
, &unit
);
2297 static VirtioNetRscChain
*virtio_net_rsc_lookup_chain(VirtIONet
*n
,
2301 VirtioNetRscChain
*chain
;
2303 if ((proto
!= (uint16_t)ETH_P_IP
) && (proto
!= (uint16_t)ETH_P_IPV6
)) {
2307 QTAILQ_FOREACH(chain
, &n
->rsc_chains
, next
) {
2308 if (chain
->proto
== proto
) {
2313 chain
= g_malloc(sizeof(*chain
));
2315 chain
->proto
= proto
;
2316 if (proto
== (uint16_t)ETH_P_IP
) {
2317 chain
->max_payload
= VIRTIO_NET_MAX_IP4_PAYLOAD
;
2318 chain
->gso_type
= VIRTIO_NET_HDR_GSO_TCPV4
;
2320 chain
->max_payload
= VIRTIO_NET_MAX_IP6_PAYLOAD
;
2321 chain
->gso_type
= VIRTIO_NET_HDR_GSO_TCPV6
;
2323 chain
->drain_timer
= timer_new_ns(QEMU_CLOCK_HOST
,
2324 virtio_net_rsc_purge
, chain
);
2325 memset(&chain
->stat
, 0, sizeof(chain
->stat
));
2327 QTAILQ_INIT(&chain
->buffers
);
2328 QTAILQ_INSERT_TAIL(&n
->rsc_chains
, chain
, next
);
2333 static ssize_t
virtio_net_rsc_receive(NetClientState
*nc
,
2338 VirtioNetRscChain
*chain
;
2339 struct eth_header
*eth
;
2342 n
= qemu_get_nic_opaque(nc
);
2343 if (size
< (n
->host_hdr_len
+ sizeof(struct eth_header
))) {
2344 return virtio_net_do_receive(nc
, buf
, size
);
2347 eth
= (struct eth_header
*)(buf
+ n
->guest_hdr_len
);
2348 proto
= htons(eth
->h_proto
);
2350 chain
= virtio_net_rsc_lookup_chain(n
, nc
, proto
);
2352 chain
->stat
.received
++;
2353 if (proto
== (uint16_t)ETH_P_IP
&& n
->rsc4_enabled
) {
2354 return virtio_net_rsc_receive4(chain
, nc
, buf
, size
);
2355 } else if (proto
== (uint16_t)ETH_P_IPV6
&& n
->rsc6_enabled
) {
2356 return virtio_net_rsc_receive6(chain
, nc
, buf
, size
);
2359 return virtio_net_do_receive(nc
, buf
, size
);
2362 static ssize_t
virtio_net_receive(NetClientState
*nc
, const uint8_t *buf
,
2365 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
2366 if ((n
->rsc4_enabled
|| n
->rsc6_enabled
)) {
2367 return virtio_net_rsc_receive(nc
, buf
, size
);
2369 return virtio_net_do_receive(nc
, buf
, size
);
2373 static int32_t virtio_net_flush_tx(VirtIONetQueue
*q
);
2375 static void virtio_net_tx_complete(NetClientState
*nc
, ssize_t len
)
2377 VirtIONet
*n
= qemu_get_nic_opaque(nc
);
2378 VirtIONetQueue
*q
= virtio_net_get_subqueue(nc
);
2379 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2381 virtqueue_push(q
->tx_vq
, q
->async_tx
.elem
, 0);
2382 virtio_notify(vdev
, q
->tx_vq
);
2384 g_free(q
->async_tx
.elem
);
2385 q
->async_tx
.elem
= NULL
;
2387 virtio_queue_set_notification(q
->tx_vq
, 1);
2388 virtio_net_flush_tx(q
);
2392 static int32_t virtio_net_flush_tx(VirtIONetQueue
*q
)
2394 VirtIONet
*n
= q
->n
;
2395 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2396 VirtQueueElement
*elem
;
2397 int32_t num_packets
= 0;
2398 int queue_index
= vq2q(virtio_get_queue_index(q
->tx_vq
));
2399 if (!(vdev
->status
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
2403 if (q
->async_tx
.elem
) {
2404 virtio_queue_set_notification(q
->tx_vq
, 0);
2410 unsigned int out_num
;
2411 struct iovec sg
[VIRTQUEUE_MAX_SIZE
], sg2
[VIRTQUEUE_MAX_SIZE
+ 1], *out_sg
;
2412 struct virtio_net_hdr_mrg_rxbuf mhdr
;
2414 elem
= virtqueue_pop(q
->tx_vq
, sizeof(VirtQueueElement
));
2419 out_num
= elem
->out_num
;
2420 out_sg
= elem
->out_sg
;
2422 virtio_error(vdev
, "virtio-net header not in first element");
2423 virtqueue_detach_element(q
->tx_vq
, elem
, 0);
2428 if (n
->has_vnet_hdr
) {
2429 if (iov_to_buf(out_sg
, out_num
, 0, &mhdr
, n
->guest_hdr_len
) <
2431 virtio_error(vdev
, "virtio-net header incorrect");
2432 virtqueue_detach_element(q
->tx_vq
, elem
, 0);
2436 if (n
->needs_vnet_hdr_swap
) {
2437 virtio_net_hdr_swap(vdev
, (void *) &mhdr
);
2438 sg2
[0].iov_base
= &mhdr
;
2439 sg2
[0].iov_len
= n
->guest_hdr_len
;
2440 out_num
= iov_copy(&sg2
[1], ARRAY_SIZE(sg2
) - 1,
2442 n
->guest_hdr_len
, -1);
2443 if (out_num
== VIRTQUEUE_MAX_SIZE
) {
2451 * If host wants to see the guest header as is, we can
2452 * pass it on unchanged. Otherwise, copy just the parts
2453 * that host is interested in.
2455 assert(n
->host_hdr_len
<= n
->guest_hdr_len
);
2456 if (n
->host_hdr_len
!= n
->guest_hdr_len
) {
2457 unsigned sg_num
= iov_copy(sg
, ARRAY_SIZE(sg
),
2459 0, n
->host_hdr_len
);
2460 sg_num
+= iov_copy(sg
+ sg_num
, ARRAY_SIZE(sg
) - sg_num
,
2462 n
->guest_hdr_len
, -1);
2467 ret
= qemu_sendv_packet_async(qemu_get_subqueue(n
->nic
, queue_index
),
2468 out_sg
, out_num
, virtio_net_tx_complete
);
2470 virtio_queue_set_notification(q
->tx_vq
, 0);
2471 q
->async_tx
.elem
= elem
;
2476 virtqueue_push(q
->tx_vq
, elem
, 0);
2477 virtio_notify(vdev
, q
->tx_vq
);
2480 if (++num_packets
>= n
->tx_burst
) {
2487 static void virtio_net_handle_tx_timer(VirtIODevice
*vdev
, VirtQueue
*vq
)
2489 VirtIONet
*n
= VIRTIO_NET(vdev
);
2490 VirtIONetQueue
*q
= &n
->vqs
[vq2q(virtio_get_queue_index(vq
))];
2492 if (unlikely((n
->status
& VIRTIO_NET_S_LINK_UP
) == 0)) {
2493 virtio_net_drop_tx_queue_data(vdev
, vq
);
2497 /* This happens when device was stopped but VCPU wasn't. */
2498 if (!vdev
->vm_running
) {
2503 if (q
->tx_waiting
) {
2504 virtio_queue_set_notification(vq
, 1);
2505 timer_del(q
->tx_timer
);
2507 if (virtio_net_flush_tx(q
) == -EINVAL
) {
2511 timer_mod(q
->tx_timer
,
2512 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
) + n
->tx_timeout
);
2514 virtio_queue_set_notification(vq
, 0);
2518 static void virtio_net_handle_tx_bh(VirtIODevice
*vdev
, VirtQueue
*vq
)
2520 VirtIONet
*n
= VIRTIO_NET(vdev
);
2521 VirtIONetQueue
*q
= &n
->vqs
[vq2q(virtio_get_queue_index(vq
))];
2523 if (unlikely((n
->status
& VIRTIO_NET_S_LINK_UP
) == 0)) {
2524 virtio_net_drop_tx_queue_data(vdev
, vq
);
2528 if (unlikely(q
->tx_waiting
)) {
2532 /* This happens when device was stopped but VCPU wasn't. */
2533 if (!vdev
->vm_running
) {
2536 virtio_queue_set_notification(vq
, 0);
2537 qemu_bh_schedule(q
->tx_bh
);
2540 static void virtio_net_tx_timer(void *opaque
)
2542 VirtIONetQueue
*q
= opaque
;
2543 VirtIONet
*n
= q
->n
;
2544 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2545 /* This happens when device was stopped but BH wasn't. */
2546 if (!vdev
->vm_running
) {
2547 /* Make sure tx waiting is set, so we'll run when restarted. */
2548 assert(q
->tx_waiting
);
2554 /* Just in case the driver is not ready on more */
2555 if (!(vdev
->status
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
2559 virtio_queue_set_notification(q
->tx_vq
, 1);
2560 virtio_net_flush_tx(q
);
2563 static void virtio_net_tx_bh(void *opaque
)
2565 VirtIONetQueue
*q
= opaque
;
2566 VirtIONet
*n
= q
->n
;
2567 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2570 /* This happens when device was stopped but BH wasn't. */
2571 if (!vdev
->vm_running
) {
2572 /* Make sure tx waiting is set, so we'll run when restarted. */
2573 assert(q
->tx_waiting
);
2579 /* Just in case the driver is not ready on more */
2580 if (unlikely(!(vdev
->status
& VIRTIO_CONFIG_S_DRIVER_OK
))) {
2584 ret
= virtio_net_flush_tx(q
);
2585 if (ret
== -EBUSY
|| ret
== -EINVAL
) {
2586 return; /* Notification re-enable handled by tx_complete or device
2590 /* If we flush a full burst of packets, assume there are
2591 * more coming and immediately reschedule */
2592 if (ret
>= n
->tx_burst
) {
2593 qemu_bh_schedule(q
->tx_bh
);
2598 /* If less than a full burst, re-enable notification and flush
2599 * anything that may have come in while we weren't looking. If
2600 * we find something, assume the guest is still active and reschedule */
2601 virtio_queue_set_notification(q
->tx_vq
, 1);
2602 ret
= virtio_net_flush_tx(q
);
2603 if (ret
== -EINVAL
) {
2605 } else if (ret
> 0) {
2606 virtio_queue_set_notification(q
->tx_vq
, 0);
2607 qemu_bh_schedule(q
->tx_bh
);
2612 static void virtio_net_add_queue(VirtIONet
*n
, int index
)
2614 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2616 n
->vqs
[index
].rx_vq
= virtio_add_queue(vdev
, n
->net_conf
.rx_queue_size
,
2617 virtio_net_handle_rx
);
2619 if (n
->net_conf
.tx
&& !strcmp(n
->net_conf
.tx
, "timer")) {
2620 n
->vqs
[index
].tx_vq
=
2621 virtio_add_queue(vdev
, n
->net_conf
.tx_queue_size
,
2622 virtio_net_handle_tx_timer
);
2623 n
->vqs
[index
].tx_timer
= timer_new_ns(QEMU_CLOCK_VIRTUAL
,
2624 virtio_net_tx_timer
,
2627 n
->vqs
[index
].tx_vq
=
2628 virtio_add_queue(vdev
, n
->net_conf
.tx_queue_size
,
2629 virtio_net_handle_tx_bh
);
2630 n
->vqs
[index
].tx_bh
= qemu_bh_new(virtio_net_tx_bh
, &n
->vqs
[index
]);
2633 n
->vqs
[index
].tx_waiting
= 0;
2634 n
->vqs
[index
].n
= n
;
2637 static void virtio_net_del_queue(VirtIONet
*n
, int index
)
2639 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2640 VirtIONetQueue
*q
= &n
->vqs
[index
];
2641 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, index
);
2643 qemu_purge_queued_packets(nc
);
2645 virtio_del_queue(vdev
, index
* 2);
2647 timer_free(q
->tx_timer
);
2650 qemu_bh_delete(q
->tx_bh
);
2654 virtio_del_queue(vdev
, index
* 2 + 1);
2657 static void virtio_net_change_num_queues(VirtIONet
*n
, int new_max_queues
)
2659 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2660 int old_num_queues
= virtio_get_num_queues(vdev
);
2661 int new_num_queues
= new_max_queues
* 2 + 1;
2664 assert(old_num_queues
>= 3);
2665 assert(old_num_queues
% 2 == 1);
2667 if (old_num_queues
== new_num_queues
) {
2672 * We always need to remove and add ctrl vq if
2673 * old_num_queues != new_num_queues. Remove ctrl_vq first,
2674 * and then we only enter one of the following two loops.
2676 virtio_del_queue(vdev
, old_num_queues
- 1);
2678 for (i
= new_num_queues
- 1; i
< old_num_queues
- 1; i
+= 2) {
2679 /* new_num_queues < old_num_queues */
2680 virtio_net_del_queue(n
, i
/ 2);
2683 for (i
= old_num_queues
- 1; i
< new_num_queues
- 1; i
+= 2) {
2684 /* new_num_queues > old_num_queues */
2685 virtio_net_add_queue(n
, i
/ 2);
2688 /* add ctrl_vq last */
2689 n
->ctrl_vq
= virtio_add_queue(vdev
, 64, virtio_net_handle_ctrl
);
2692 static void virtio_net_set_multiqueue(VirtIONet
*n
, int multiqueue
)
2694 int max
= multiqueue
? n
->max_queues
: 1;
2696 n
->multiqueue
= multiqueue
;
2697 virtio_net_change_num_queues(n
, max
);
2699 virtio_net_set_queues(n
);
2702 static int virtio_net_post_load_device(void *opaque
, int version_id
)
2704 VirtIONet
*n
= opaque
;
2705 VirtIODevice
*vdev
= VIRTIO_DEVICE(n
);
2708 trace_virtio_net_post_load_device();
2709 virtio_net_set_mrg_rx_bufs(n
, n
->mergeable_rx_bufs
,
2710 virtio_vdev_has_feature(vdev
,
2711 VIRTIO_F_VERSION_1
),
2712 virtio_vdev_has_feature(vdev
,
2713 VIRTIO_NET_F_HASH_REPORT
));
2715 /* MAC_TABLE_ENTRIES may be different from the saved image */
2716 if (n
->mac_table
.in_use
> MAC_TABLE_ENTRIES
) {
2717 n
->mac_table
.in_use
= 0;
2720 if (!virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS
)) {
2721 n
->curr_guest_offloads
= virtio_net_supported_guest_offloads(n
);
2725 * curr_guest_offloads will be later overwritten by the
2726 * virtio_set_features_nocheck call done from the virtio_load.
2727 * Here we make sure it is preserved and restored accordingly
2728 * in the virtio_net_post_load_virtio callback.
2730 n
->saved_guest_offloads
= n
->curr_guest_offloads
;
2732 virtio_net_set_queues(n
);
2734 /* Find the first multicast entry in the saved MAC filter */
2735 for (i
= 0; i
< n
->mac_table
.in_use
; i
++) {
2736 if (n
->mac_table
.macs
[i
* ETH_ALEN
] & 1) {
2740 n
->mac_table
.first_multi
= i
;
2742 /* nc.link_down can't be migrated, so infer link_down according
2743 * to link status bit in n->status */
2744 link_down
= (n
->status
& VIRTIO_NET_S_LINK_UP
) == 0;
2745 for (i
= 0; i
< n
->max_queues
; i
++) {
2746 qemu_get_subqueue(n
->nic
, i
)->link_down
= link_down
;
2749 if (virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_GUEST_ANNOUNCE
) &&
2750 virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_CTRL_VQ
)) {
2751 qemu_announce_timer_reset(&n
->announce_timer
, migrate_announce_params(),
2753 virtio_net_announce_timer
, n
);
2754 if (n
->announce_timer
.round
) {
2755 timer_mod(n
->announce_timer
.tm
,
2756 qemu_clock_get_ms(n
->announce_timer
.type
));
2758 qemu_announce_timer_del(&n
->announce_timer
, false);
2762 if (n
->rss_data
.enabled
) {
2763 trace_virtio_net_rss_enable(n
->rss_data
.hash_types
,
2764 n
->rss_data
.indirections_len
,
2765 sizeof(n
->rss_data
.key
));
2767 trace_virtio_net_rss_disable();
2772 static int virtio_net_post_load_virtio(VirtIODevice
*vdev
)
2774 VirtIONet
*n
= VIRTIO_NET(vdev
);
2776 * The actual needed state is now in saved_guest_offloads,
2777 * see virtio_net_post_load_device for detail.
2778 * Restore it back and apply the desired offloads.
2780 n
->curr_guest_offloads
= n
->saved_guest_offloads
;
2781 if (peer_has_vnet_hdr(n
)) {
2782 virtio_net_apply_guest_offloads(n
);
2788 /* tx_waiting field of a VirtIONetQueue */
2789 static const VMStateDescription vmstate_virtio_net_queue_tx_waiting
= {
2790 .name
= "virtio-net-queue-tx_waiting",
2791 .fields
= (VMStateField
[]) {
2792 VMSTATE_UINT32(tx_waiting
, VirtIONetQueue
),
2793 VMSTATE_END_OF_LIST()
2797 static bool max_queues_gt_1(void *opaque
, int version_id
)
2799 return VIRTIO_NET(opaque
)->max_queues
> 1;
2802 static bool has_ctrl_guest_offloads(void *opaque
, int version_id
)
2804 return virtio_vdev_has_feature(VIRTIO_DEVICE(opaque
),
2805 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS
);
2808 static bool mac_table_fits(void *opaque
, int version_id
)
2810 return VIRTIO_NET(opaque
)->mac_table
.in_use
<= MAC_TABLE_ENTRIES
;
2813 static bool mac_table_doesnt_fit(void *opaque
, int version_id
)
2815 return !mac_table_fits(opaque
, version_id
);
2818 /* This temporary type is shared by all the WITH_TMP methods
2819 * although only some fields are used by each.
2821 struct VirtIONetMigTmp
{
2823 VirtIONetQueue
*vqs_1
;
2824 uint16_t curr_queues_1
;
2826 uint32_t has_vnet_hdr
;
2829 /* The 2nd and subsequent tx_waiting flags are loaded later than
2830 * the 1st entry in the queues and only if there's more than one
2831 * entry. We use the tmp mechanism to calculate a temporary
2832 * pointer and count and also validate the count.
2835 static int virtio_net_tx_waiting_pre_save(void *opaque
)
2837 struct VirtIONetMigTmp
*tmp
= opaque
;
2839 tmp
->vqs_1
= tmp
->parent
->vqs
+ 1;
2840 tmp
->curr_queues_1
= tmp
->parent
->curr_queues
- 1;
2841 if (tmp
->parent
->curr_queues
== 0) {
2842 tmp
->curr_queues_1
= 0;
2848 static int virtio_net_tx_waiting_pre_load(void *opaque
)
2850 struct VirtIONetMigTmp
*tmp
= opaque
;
2852 /* Reuse the pointer setup from save */
2853 virtio_net_tx_waiting_pre_save(opaque
);
2855 if (tmp
->parent
->curr_queues
> tmp
->parent
->max_queues
) {
2856 error_report("virtio-net: curr_queues %x > max_queues %x",
2857 tmp
->parent
->curr_queues
, tmp
->parent
->max_queues
);
2862 return 0; /* all good */
2865 static const VMStateDescription vmstate_virtio_net_tx_waiting
= {
2866 .name
= "virtio-net-tx_waiting",
2867 .pre_load
= virtio_net_tx_waiting_pre_load
,
2868 .pre_save
= virtio_net_tx_waiting_pre_save
,
2869 .fields
= (VMStateField
[]) {
2870 VMSTATE_STRUCT_VARRAY_POINTER_UINT16(vqs_1
, struct VirtIONetMigTmp
,
2872 vmstate_virtio_net_queue_tx_waiting
,
2873 struct VirtIONetQueue
),
2874 VMSTATE_END_OF_LIST()
2878 /* the 'has_ufo' flag is just tested; if the incoming stream has the
2879 * flag set we need to check that we have it
2881 static int virtio_net_ufo_post_load(void *opaque
, int version_id
)
2883 struct VirtIONetMigTmp
*tmp
= opaque
;
2885 if (tmp
->has_ufo
&& !peer_has_ufo(tmp
->parent
)) {
2886 error_report("virtio-net: saved image requires TUN_F_UFO support");
2893 static int virtio_net_ufo_pre_save(void *opaque
)
2895 struct VirtIONetMigTmp
*tmp
= opaque
;
2897 tmp
->has_ufo
= tmp
->parent
->has_ufo
;
2902 static const VMStateDescription vmstate_virtio_net_has_ufo
= {
2903 .name
= "virtio-net-ufo",
2904 .post_load
= virtio_net_ufo_post_load
,
2905 .pre_save
= virtio_net_ufo_pre_save
,
2906 .fields
= (VMStateField
[]) {
2907 VMSTATE_UINT8(has_ufo
, struct VirtIONetMigTmp
),
2908 VMSTATE_END_OF_LIST()
2912 /* the 'has_vnet_hdr' flag is just tested; if the incoming stream has the
2913 * flag set we need to check that we have it
2915 static int virtio_net_vnet_post_load(void *opaque
, int version_id
)
2917 struct VirtIONetMigTmp
*tmp
= opaque
;
2919 if (tmp
->has_vnet_hdr
&& !peer_has_vnet_hdr(tmp
->parent
)) {
2920 error_report("virtio-net: saved image requires vnet_hdr=on");
2927 static int virtio_net_vnet_pre_save(void *opaque
)
2929 struct VirtIONetMigTmp
*tmp
= opaque
;
2931 tmp
->has_vnet_hdr
= tmp
->parent
->has_vnet_hdr
;
2936 static const VMStateDescription vmstate_virtio_net_has_vnet
= {
2937 .name
= "virtio-net-vnet",
2938 .post_load
= virtio_net_vnet_post_load
,
2939 .pre_save
= virtio_net_vnet_pre_save
,
2940 .fields
= (VMStateField
[]) {
2941 VMSTATE_UINT32(has_vnet_hdr
, struct VirtIONetMigTmp
),
2942 VMSTATE_END_OF_LIST()
2946 static bool virtio_net_rss_needed(void *opaque
)
2948 return VIRTIO_NET(opaque
)->rss_data
.enabled
;
2951 static const VMStateDescription vmstate_virtio_net_rss
= {
2952 .name
= "virtio-net-device/rss",
2954 .minimum_version_id
= 1,
2955 .needed
= virtio_net_rss_needed
,
2956 .fields
= (VMStateField
[]) {
2957 VMSTATE_BOOL(rss_data
.enabled
, VirtIONet
),
2958 VMSTATE_BOOL(rss_data
.redirect
, VirtIONet
),
2959 VMSTATE_BOOL(rss_data
.populate_hash
, VirtIONet
),
2960 VMSTATE_UINT32(rss_data
.hash_types
, VirtIONet
),
2961 VMSTATE_UINT16(rss_data
.indirections_len
, VirtIONet
),
2962 VMSTATE_UINT16(rss_data
.default_queue
, VirtIONet
),
2963 VMSTATE_UINT8_ARRAY(rss_data
.key
, VirtIONet
,
2964 VIRTIO_NET_RSS_MAX_KEY_SIZE
),
2965 VMSTATE_VARRAY_UINT16_ALLOC(rss_data
.indirections_table
, VirtIONet
,
2966 rss_data
.indirections_len
, 0,
2967 vmstate_info_uint16
, uint16_t),
2968 VMSTATE_END_OF_LIST()
2972 static const VMStateDescription vmstate_virtio_net_device
= {
2973 .name
= "virtio-net-device",
2974 .version_id
= VIRTIO_NET_VM_VERSION
,
2975 .minimum_version_id
= VIRTIO_NET_VM_VERSION
,
2976 .post_load
= virtio_net_post_load_device
,
2977 .fields
= (VMStateField
[]) {
2978 VMSTATE_UINT8_ARRAY(mac
, VirtIONet
, ETH_ALEN
),
2979 VMSTATE_STRUCT_POINTER(vqs
, VirtIONet
,
2980 vmstate_virtio_net_queue_tx_waiting
,
2982 VMSTATE_UINT32(mergeable_rx_bufs
, VirtIONet
),
2983 VMSTATE_UINT16(status
, VirtIONet
),
2984 VMSTATE_UINT8(promisc
, VirtIONet
),
2985 VMSTATE_UINT8(allmulti
, VirtIONet
),
2986 VMSTATE_UINT32(mac_table
.in_use
, VirtIONet
),
2988 /* Guarded pair: If it fits we load it, else we throw it away
2989 * - can happen if source has a larger MAC table.; post-load
2990 * sets flags in this case.
2992 VMSTATE_VBUFFER_MULTIPLY(mac_table
.macs
, VirtIONet
,
2993 0, mac_table_fits
, mac_table
.in_use
,
2995 VMSTATE_UNUSED_VARRAY_UINT32(VirtIONet
, mac_table_doesnt_fit
, 0,
2996 mac_table
.in_use
, ETH_ALEN
),
2998 /* Note: This is an array of uint32's that's always been saved as a
2999 * buffer; hold onto your endiannesses; it's actually used as a bitmap
3000 * but based on the uint.
3002 VMSTATE_BUFFER_POINTER_UNSAFE(vlans
, VirtIONet
, 0, MAX_VLAN
>> 3),
3003 VMSTATE_WITH_TMP(VirtIONet
, struct VirtIONetMigTmp
,
3004 vmstate_virtio_net_has_vnet
),
3005 VMSTATE_UINT8(mac_table
.multi_overflow
, VirtIONet
),
3006 VMSTATE_UINT8(mac_table
.uni_overflow
, VirtIONet
),
3007 VMSTATE_UINT8(alluni
, VirtIONet
),
3008 VMSTATE_UINT8(nomulti
, VirtIONet
),
3009 VMSTATE_UINT8(nouni
, VirtIONet
),
3010 VMSTATE_UINT8(nobcast
, VirtIONet
),
3011 VMSTATE_WITH_TMP(VirtIONet
, struct VirtIONetMigTmp
,
3012 vmstate_virtio_net_has_ufo
),
3013 VMSTATE_SINGLE_TEST(max_queues
, VirtIONet
, max_queues_gt_1
, 0,
3014 vmstate_info_uint16_equal
, uint16_t),
3015 VMSTATE_UINT16_TEST(curr_queues
, VirtIONet
, max_queues_gt_1
),
3016 VMSTATE_WITH_TMP(VirtIONet
, struct VirtIONetMigTmp
,
3017 vmstate_virtio_net_tx_waiting
),
3018 VMSTATE_UINT64_TEST(curr_guest_offloads
, VirtIONet
,
3019 has_ctrl_guest_offloads
),
3020 VMSTATE_END_OF_LIST()
3022 .subsections
= (const VMStateDescription
* []) {
3023 &vmstate_virtio_net_rss
,
3028 static NetClientInfo net_virtio_info
= {
3029 .type
= NET_CLIENT_DRIVER_NIC
,
3030 .size
= sizeof(NICState
),
3031 .can_receive
= virtio_net_can_receive
,
3032 .receive
= virtio_net_receive
,
3033 .link_status_changed
= virtio_net_set_link_status
,
3034 .query_rx_filter
= virtio_net_query_rxfilter
,
3035 .announce
= virtio_net_announce
,
3038 static bool virtio_net_guest_notifier_pending(VirtIODevice
*vdev
, int idx
)
3040 VirtIONet
*n
= VIRTIO_NET(vdev
);
3041 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, vq2q(idx
));
3042 assert(n
->vhost_started
);
3043 return vhost_net_virtqueue_pending(get_vhost_net(nc
->peer
), idx
);
3046 static void virtio_net_guest_notifier_mask(VirtIODevice
*vdev
, int idx
,
3049 VirtIONet
*n
= VIRTIO_NET(vdev
);
3050 NetClientState
*nc
= qemu_get_subqueue(n
->nic
, vq2q(idx
));
3051 assert(n
->vhost_started
);
3052 vhost_net_virtqueue_mask(get_vhost_net(nc
->peer
),
3056 static void virtio_net_set_config_size(VirtIONet
*n
, uint64_t host_features
)
3058 virtio_add_feature(&host_features
, VIRTIO_NET_F_MAC
);
3060 n
->config_size
= virtio_feature_get_config_size(feature_sizes
,
3064 void virtio_net_set_netclient_name(VirtIONet
*n
, const char *name
,
3068 * The name can be NULL, the netclient name will be type.x.
3070 assert(type
!= NULL
);
3072 g_free(n
->netclient_name
);
3073 g_free(n
->netclient_type
);
3074 n
->netclient_name
= g_strdup(name
);
3075 n
->netclient_type
= g_strdup(type
);
3078 static bool failover_unplug_primary(VirtIONet
*n
, DeviceState
*dev
)
3080 HotplugHandler
*hotplug_ctrl
;
3084 hotplug_ctrl
= qdev_get_hotplug_handler(dev
);
3086 pci_dev
= PCI_DEVICE(dev
);
3087 pci_dev
->partially_hotplugged
= true;
3088 hotplug_handler_unplug_request(hotplug_ctrl
, dev
, &err
);
3090 error_report_err(err
);
3099 static bool failover_replug_primary(VirtIONet
*n
, DeviceState
*dev
,
3103 HotplugHandler
*hotplug_ctrl
;
3104 PCIDevice
*pdev
= PCI_DEVICE(dev
);
3105 BusState
*primary_bus
;
3107 if (!pdev
->partially_hotplugged
) {
3110 primary_bus
= dev
->parent_bus
;
3112 error_setg(errp
, "virtio_net: couldn't find primary bus");
3115 qdev_set_parent_bus(dev
, primary_bus
, &error_abort
);
3116 qatomic_set(&n
->failover_primary_hidden
, false);
3117 hotplug_ctrl
= qdev_get_hotplug_handler(dev
);
3119 hotplug_handler_pre_plug(hotplug_ctrl
, dev
, &err
);
3123 hotplug_handler_plug(hotplug_ctrl
, dev
, &err
);
3127 error_propagate(errp
, err
);
3131 static void virtio_net_handle_migration_primary(VirtIONet
*n
, MigrationState
*s
)
3133 bool should_be_hidden
;
3135 DeviceState
*dev
= failover_find_primary_device(n
);
3141 should_be_hidden
= qatomic_read(&n
->failover_primary_hidden
);
3143 if (migration_in_setup(s
) && !should_be_hidden
) {
3144 if (failover_unplug_primary(n
, dev
)) {
3145 vmstate_unregister(VMSTATE_IF(dev
), qdev_get_vmsd(dev
), dev
);
3146 qapi_event_send_unplug_primary(dev
->id
);
3147 qatomic_set(&n
->failover_primary_hidden
, true);
3149 warn_report("couldn't unplug primary device");
3151 } else if (migration_has_failed(s
)) {
3152 /* We already unplugged the device let's plug it back */
3153 if (!failover_replug_primary(n
, dev
, &err
)) {
3155 error_report_err(err
);
3161 static void virtio_net_migration_state_notifier(Notifier
*notifier
, void *data
)
3163 MigrationState
*s
= data
;
3164 VirtIONet
*n
= container_of(notifier
, VirtIONet
, migration_state
);
3165 virtio_net_handle_migration_primary(n
, s
);
3168 static bool failover_hide_primary_device(DeviceListener
*listener
,
3169 QemuOpts
*device_opts
)
3171 VirtIONet
*n
= container_of(listener
, VirtIONet
, primary_listener
);
3172 const char *standby_id
;
3177 standby_id
= qemu_opt_get(device_opts
, "failover_pair_id");
3178 if (g_strcmp0(standby_id
, n
->netclient_name
) != 0) {
3182 /* failover_primary_hidden is set during feature negotiation */
3183 return qatomic_read(&n
->failover_primary_hidden
);
3186 static void virtio_net_device_realize(DeviceState
*dev
, Error
**errp
)
3188 VirtIODevice
*vdev
= VIRTIO_DEVICE(dev
);
3189 VirtIONet
*n
= VIRTIO_NET(dev
);
3193 if (n
->net_conf
.mtu
) {
3194 n
->host_features
|= (1ULL << VIRTIO_NET_F_MTU
);
3197 if (n
->net_conf
.duplex_str
) {
3198 if (strncmp(n
->net_conf
.duplex_str
, "half", 5) == 0) {
3199 n
->net_conf
.duplex
= DUPLEX_HALF
;
3200 } else if (strncmp(n
->net_conf
.duplex_str
, "full", 5) == 0) {
3201 n
->net_conf
.duplex
= DUPLEX_FULL
;
3203 error_setg(errp
, "'duplex' must be 'half' or 'full'");
3206 n
->host_features
|= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX
);
3208 n
->net_conf
.duplex
= DUPLEX_UNKNOWN
;
3211 if (n
->net_conf
.speed
< SPEED_UNKNOWN
) {
3212 error_setg(errp
, "'speed' must be between 0 and INT_MAX");
3215 if (n
->net_conf
.speed
>= 0) {
3216 n
->host_features
|= (1ULL << VIRTIO_NET_F_SPEED_DUPLEX
);
3220 n
->primary_listener
.hide_device
= failover_hide_primary_device
;
3221 qatomic_set(&n
->failover_primary_hidden
, true);
3222 device_listener_register(&n
->primary_listener
);
3223 n
->migration_state
.notify
= virtio_net_migration_state_notifier
;
3224 add_migration_state_change_notifier(&n
->migration_state
);
3225 n
->host_features
|= (1ULL << VIRTIO_NET_F_STANDBY
);
3228 virtio_net_set_config_size(n
, n
->host_features
);
3229 virtio_init(vdev
, "virtio-net", VIRTIO_ID_NET
, n
->config_size
);
3232 * We set a lower limit on RX queue size to what it always was.
3233 * Guests that want a smaller ring can always resize it without
3234 * help from us (using virtio 1 and up).
3236 if (n
->net_conf
.rx_queue_size
< VIRTIO_NET_RX_QUEUE_MIN_SIZE
||
3237 n
->net_conf
.rx_queue_size
> VIRTQUEUE_MAX_SIZE
||
3238 !is_power_of_2(n
->net_conf
.rx_queue_size
)) {
3239 error_setg(errp
, "Invalid rx_queue_size (= %" PRIu16
"), "
3240 "must be a power of 2 between %d and %d.",
3241 n
->net_conf
.rx_queue_size
, VIRTIO_NET_RX_QUEUE_MIN_SIZE
,
3242 VIRTQUEUE_MAX_SIZE
);
3243 virtio_cleanup(vdev
);
3247 if (n
->net_conf
.tx_queue_size
< VIRTIO_NET_TX_QUEUE_MIN_SIZE
||
3248 n
->net_conf
.tx_queue_size
> VIRTQUEUE_MAX_SIZE
||
3249 !is_power_of_2(n
->net_conf
.tx_queue_size
)) {
3250 error_setg(errp
, "Invalid tx_queue_size (= %" PRIu16
"), "
3251 "must be a power of 2 between %d and %d",
3252 n
->net_conf
.tx_queue_size
, VIRTIO_NET_TX_QUEUE_MIN_SIZE
,
3253 VIRTQUEUE_MAX_SIZE
);
3254 virtio_cleanup(vdev
);
3258 n
->max_queues
= MAX(n
->nic_conf
.peers
.queues
, 1);
3259 if (n
->max_queues
* 2 + 1 > VIRTIO_QUEUE_MAX
) {
3260 error_setg(errp
, "Invalid number of queues (= %" PRIu32
"), "
3261 "must be a positive integer less than %d.",
3262 n
->max_queues
, (VIRTIO_QUEUE_MAX
- 1) / 2);
3263 virtio_cleanup(vdev
);
3266 n
->vqs
= g_malloc0(sizeof(VirtIONetQueue
) * n
->max_queues
);
3268 n
->tx_timeout
= n
->net_conf
.txtimer
;
3270 if (n
->net_conf
.tx
&& strcmp(n
->net_conf
.tx
, "timer")
3271 && strcmp(n
->net_conf
.tx
, "bh")) {
3272 warn_report("virtio-net: "
3273 "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
3275 error_printf("Defaulting to \"bh\"");
3278 n
->net_conf
.tx_queue_size
= MIN(virtio_net_max_tx_queue_size(n
),
3279 n
->net_conf
.tx_queue_size
);
3281 for (i
= 0; i
< n
->max_queues
; i
++) {
3282 virtio_net_add_queue(n
, i
);
3285 n
->ctrl_vq
= virtio_add_queue(vdev
, 64, virtio_net_handle_ctrl
);
3286 qemu_macaddr_default_if_unset(&n
->nic_conf
.macaddr
);
3287 memcpy(&n
->mac
[0], &n
->nic_conf
.macaddr
, sizeof(n
->mac
));
3288 n
->status
= VIRTIO_NET_S_LINK_UP
;
3289 qemu_announce_timer_reset(&n
->announce_timer
, migrate_announce_params(),
3291 virtio_net_announce_timer
, n
);
3292 n
->announce_timer
.round
= 0;
3294 if (n
->netclient_type
) {
3296 * Happen when virtio_net_set_netclient_name has been called.
3298 n
->nic
= qemu_new_nic(&net_virtio_info
, &n
->nic_conf
,
3299 n
->netclient_type
, n
->netclient_name
, n
);
3301 n
->nic
= qemu_new_nic(&net_virtio_info
, &n
->nic_conf
,
3302 object_get_typename(OBJECT(dev
)), dev
->id
, n
);
3305 peer_test_vnet_hdr(n
);
3306 if (peer_has_vnet_hdr(n
)) {
3307 for (i
= 0; i
< n
->max_queues
; i
++) {
3308 qemu_using_vnet_hdr(qemu_get_subqueue(n
->nic
, i
)->peer
, true);
3310 n
->host_hdr_len
= sizeof(struct virtio_net_hdr
);
3312 n
->host_hdr_len
= 0;
3315 qemu_format_nic_info_str(qemu_get_queue(n
->nic
), n
->nic_conf
.macaddr
.a
);
3317 n
->vqs
[0].tx_waiting
= 0;
3318 n
->tx_burst
= n
->net_conf
.txburst
;
3319 virtio_net_set_mrg_rx_bufs(n
, 0, 0, 0);
3320 n
->promisc
= 1; /* for compatibility */
3322 n
->mac_table
.macs
= g_malloc0(MAC_TABLE_ENTRIES
* ETH_ALEN
);
3324 n
->vlans
= g_malloc0(MAX_VLAN
>> 3);
3326 nc
= qemu_get_queue(n
->nic
);
3327 nc
->rxfilter_notify_enabled
= 1;
3329 if (nc
->peer
&& nc
->peer
->info
->type
== NET_CLIENT_DRIVER_VHOST_VDPA
) {
3330 struct virtio_net_config netcfg
= {};
3331 memcpy(&netcfg
.mac
, &n
->nic_conf
.macaddr
, ETH_ALEN
);
3332 vhost_net_set_config(get_vhost_net(nc
->peer
),
3333 (uint8_t *)&netcfg
, 0, ETH_ALEN
, VHOST_SET_CONFIG_TYPE_MASTER
);
3335 QTAILQ_INIT(&n
->rsc_chains
);
3338 net_rx_pkt_init(&n
->rx_pkt
, false);
3341 static void virtio_net_device_unrealize(DeviceState
*dev
)
3343 VirtIODevice
*vdev
= VIRTIO_DEVICE(dev
);
3344 VirtIONet
*n
= VIRTIO_NET(dev
);
3347 /* This will stop vhost backend if appropriate. */
3348 virtio_net_set_status(vdev
, 0);
3350 g_free(n
->netclient_name
);
3351 n
->netclient_name
= NULL
;
3352 g_free(n
->netclient_type
);
3353 n
->netclient_type
= NULL
;
3355 g_free(n
->mac_table
.macs
);
3359 device_listener_unregister(&n
->primary_listener
);
3362 max_queues
= n
->multiqueue
? n
->max_queues
: 1;
3363 for (i
= 0; i
< max_queues
; i
++) {
3364 virtio_net_del_queue(n
, i
);
3366 /* delete also control vq */
3367 virtio_del_queue(vdev
, max_queues
* 2);
3368 qemu_announce_timer_del(&n
->announce_timer
, false);
3370 qemu_del_nic(n
->nic
);
3371 virtio_net_rsc_cleanup(n
);
3372 g_free(n
->rss_data
.indirections_table
);
3373 net_rx_pkt_uninit(n
->rx_pkt
);
3374 virtio_cleanup(vdev
);
3377 static void virtio_net_instance_init(Object
*obj
)
3379 VirtIONet
*n
= VIRTIO_NET(obj
);
3382 * The default config_size is sizeof(struct virtio_net_config).
3383 * Can be overriden with virtio_net_set_config_size.
3385 n
->config_size
= sizeof(struct virtio_net_config
);
3386 device_add_bootindex_property(obj
, &n
->nic_conf
.bootindex
,
3387 "bootindex", "/ethernet-phy@0",
3391 static int virtio_net_pre_save(void *opaque
)
3393 VirtIONet
*n
= opaque
;
3395 /* At this point, backend must be stopped, otherwise
3396 * it might keep writing to memory. */
3397 assert(!n
->vhost_started
);
3402 static bool primary_unplug_pending(void *opaque
)
3404 DeviceState
*dev
= opaque
;
3405 DeviceState
*primary
;
3406 VirtIODevice
*vdev
= VIRTIO_DEVICE(dev
);
3407 VirtIONet
*n
= VIRTIO_NET(vdev
);
3409 if (!virtio_vdev_has_feature(vdev
, VIRTIO_NET_F_STANDBY
)) {
3412 primary
= failover_find_primary_device(n
);
3413 return primary
? primary
->pending_deleted_event
: false;
3416 static bool dev_unplug_pending(void *opaque
)
3418 DeviceState
*dev
= opaque
;
3419 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_GET_CLASS(dev
);
3421 return vdc
->primary_unplug_pending(dev
);
3424 static const VMStateDescription vmstate_virtio_net
= {
3425 .name
= "virtio-net",
3426 .minimum_version_id
= VIRTIO_NET_VM_VERSION
,
3427 .version_id
= VIRTIO_NET_VM_VERSION
,
3428 .fields
= (VMStateField
[]) {
3429 VMSTATE_VIRTIO_DEVICE
,
3430 VMSTATE_END_OF_LIST()
3432 .pre_save
= virtio_net_pre_save
,
3433 .dev_unplug_pending
= dev_unplug_pending
,
3436 static Property virtio_net_properties
[] = {
3437 DEFINE_PROP_BIT64("csum", VirtIONet
, host_features
,
3438 VIRTIO_NET_F_CSUM
, true),
3439 DEFINE_PROP_BIT64("guest_csum", VirtIONet
, host_features
,
3440 VIRTIO_NET_F_GUEST_CSUM
, true),
3441 DEFINE_PROP_BIT64("gso", VirtIONet
, host_features
, VIRTIO_NET_F_GSO
, true),
3442 DEFINE_PROP_BIT64("guest_tso4", VirtIONet
, host_features
,
3443 VIRTIO_NET_F_GUEST_TSO4
, true),
3444 DEFINE_PROP_BIT64("guest_tso6", VirtIONet
, host_features
,
3445 VIRTIO_NET_F_GUEST_TSO6
, true),
3446 DEFINE_PROP_BIT64("guest_ecn", VirtIONet
, host_features
,
3447 VIRTIO_NET_F_GUEST_ECN
, true),
3448 DEFINE_PROP_BIT64("guest_ufo", VirtIONet
, host_features
,
3449 VIRTIO_NET_F_GUEST_UFO
, true),
3450 DEFINE_PROP_BIT64("guest_announce", VirtIONet
, host_features
,
3451 VIRTIO_NET_F_GUEST_ANNOUNCE
, true),
3452 DEFINE_PROP_BIT64("host_tso4", VirtIONet
, host_features
,
3453 VIRTIO_NET_F_HOST_TSO4
, true),
3454 DEFINE_PROP_BIT64("host_tso6", VirtIONet
, host_features
,
3455 VIRTIO_NET_F_HOST_TSO6
, true),
3456 DEFINE_PROP_BIT64("host_ecn", VirtIONet
, host_features
,
3457 VIRTIO_NET_F_HOST_ECN
, true),
3458 DEFINE_PROP_BIT64("host_ufo", VirtIONet
, host_features
,
3459 VIRTIO_NET_F_HOST_UFO
, true),
3460 DEFINE_PROP_BIT64("mrg_rxbuf", VirtIONet
, host_features
,
3461 VIRTIO_NET_F_MRG_RXBUF
, true),
3462 DEFINE_PROP_BIT64("status", VirtIONet
, host_features
,
3463 VIRTIO_NET_F_STATUS
, true),
3464 DEFINE_PROP_BIT64("ctrl_vq", VirtIONet
, host_features
,
3465 VIRTIO_NET_F_CTRL_VQ
, true),
3466 DEFINE_PROP_BIT64("ctrl_rx", VirtIONet
, host_features
,
3467 VIRTIO_NET_F_CTRL_RX
, true),
3468 DEFINE_PROP_BIT64("ctrl_vlan", VirtIONet
, host_features
,
3469 VIRTIO_NET_F_CTRL_VLAN
, true),
3470 DEFINE_PROP_BIT64("ctrl_rx_extra", VirtIONet
, host_features
,
3471 VIRTIO_NET_F_CTRL_RX_EXTRA
, true),
3472 DEFINE_PROP_BIT64("ctrl_mac_addr", VirtIONet
, host_features
,
3473 VIRTIO_NET_F_CTRL_MAC_ADDR
, true),
3474 DEFINE_PROP_BIT64("ctrl_guest_offloads", VirtIONet
, host_features
,
3475 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS
, true),
3476 DEFINE_PROP_BIT64("mq", VirtIONet
, host_features
, VIRTIO_NET_F_MQ
, false),
3477 DEFINE_PROP_BIT64("rss", VirtIONet
, host_features
,
3478 VIRTIO_NET_F_RSS
, false),
3479 DEFINE_PROP_BIT64("hash", VirtIONet
, host_features
,
3480 VIRTIO_NET_F_HASH_REPORT
, false),
3481 DEFINE_PROP_BIT64("guest_rsc_ext", VirtIONet
, host_features
,
3482 VIRTIO_NET_F_RSC_EXT
, false),
3483 DEFINE_PROP_UINT32("rsc_interval", VirtIONet
, rsc_timeout
,
3484 VIRTIO_NET_RSC_DEFAULT_INTERVAL
),
3485 DEFINE_NIC_PROPERTIES(VirtIONet
, nic_conf
),
3486 DEFINE_PROP_UINT32("x-txtimer", VirtIONet
, net_conf
.txtimer
,
3488 DEFINE_PROP_INT32("x-txburst", VirtIONet
, net_conf
.txburst
, TX_BURST
),
3489 DEFINE_PROP_STRING("tx", VirtIONet
, net_conf
.tx
),
3490 DEFINE_PROP_UINT16("rx_queue_size", VirtIONet
, net_conf
.rx_queue_size
,
3491 VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE
),
3492 DEFINE_PROP_UINT16("tx_queue_size", VirtIONet
, net_conf
.tx_queue_size
,
3493 VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE
),
3494 DEFINE_PROP_UINT16("host_mtu", VirtIONet
, net_conf
.mtu
, 0),
3495 DEFINE_PROP_BOOL("x-mtu-bypass-backend", VirtIONet
, mtu_bypass_backend
,
3497 DEFINE_PROP_INT32("speed", VirtIONet
, net_conf
.speed
, SPEED_UNKNOWN
),
3498 DEFINE_PROP_STRING("duplex", VirtIONet
, net_conf
.duplex_str
),
3499 DEFINE_PROP_BOOL("failover", VirtIONet
, failover
, false),
3500 DEFINE_PROP_END_OF_LIST(),
3503 static void virtio_net_class_init(ObjectClass
*klass
, void *data
)
3505 DeviceClass
*dc
= DEVICE_CLASS(klass
);
3506 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_CLASS(klass
);
3508 device_class_set_props(dc
, virtio_net_properties
);
3509 dc
->vmsd
= &vmstate_virtio_net
;
3510 set_bit(DEVICE_CATEGORY_NETWORK
, dc
->categories
);
3511 vdc
->realize
= virtio_net_device_realize
;
3512 vdc
->unrealize
= virtio_net_device_unrealize
;
3513 vdc
->get_config
= virtio_net_get_config
;
3514 vdc
->set_config
= virtio_net_set_config
;
3515 vdc
->get_features
= virtio_net_get_features
;
3516 vdc
->set_features
= virtio_net_set_features
;
3517 vdc
->bad_features
= virtio_net_bad_features
;
3518 vdc
->reset
= virtio_net_reset
;
3519 vdc
->set_status
= virtio_net_set_status
;
3520 vdc
->guest_notifier_mask
= virtio_net_guest_notifier_mask
;
3521 vdc
->guest_notifier_pending
= virtio_net_guest_notifier_pending
;
3522 vdc
->legacy_features
|= (0x1 << VIRTIO_NET_F_GSO
);
3523 vdc
->post_load
= virtio_net_post_load_virtio
;
3524 vdc
->vmsd
= &vmstate_virtio_net_device
;
3525 vdc
->primary_unplug_pending
= primary_unplug_pending
;
3528 static const TypeInfo virtio_net_info
= {
3529 .name
= TYPE_VIRTIO_NET
,
3530 .parent
= TYPE_VIRTIO_DEVICE
,
3531 .instance_size
= sizeof(VirtIONet
),
3532 .instance_init
= virtio_net_instance_init
,
3533 .class_init
= virtio_net_class_init
,
3536 static void virtio_register_types(void)
3538 type_register_static(&virtio_net_info
);
3541 type_init(virtio_register_types
)