root / hw / virtio-net.c @ 1e89ad5b
History | View | Annotate | Download (40.1 kB)
1 | fbe78f4f | aliguori | /*
|
---|---|---|---|
2 | fbe78f4f | aliguori | * Virtio Network Device
|
3 | fbe78f4f | aliguori | *
|
4 | fbe78f4f | aliguori | * Copyright IBM, Corp. 2007
|
5 | fbe78f4f | aliguori | *
|
6 | fbe78f4f | aliguori | * Authors:
|
7 | fbe78f4f | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
|
8 | fbe78f4f | aliguori | *
|
9 | fbe78f4f | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
|
10 | fbe78f4f | aliguori | * the COPYING file in the top-level directory.
|
11 | fbe78f4f | aliguori | *
|
12 | fbe78f4f | aliguori | */
|
13 | fbe78f4f | aliguori | |
14 | 1de7afc9 | Paolo Bonzini | #include "qemu/iov.h" |
15 | fbe78f4f | aliguori | #include "virtio.h" |
16 | 1422e32d | Paolo Bonzini | #include "net/net.h" |
17 | 7200ac3c | Mark McLoughlin | #include "net/checksum.h" |
18 | a8ed73f7 | Mark McLoughlin | #include "net/tap.h" |
19 | 1de7afc9 | Paolo Bonzini | #include "qemu/error-report.h" |
20 | 1de7afc9 | Paolo Bonzini | #include "qemu/timer.h" |
21 | fbe78f4f | aliguori | #include "virtio-net.h" |
22 | 9bc6304c | Michael S. Tsirkin | #include "vhost_net.h" |
23 | fbe78f4f | aliguori | |
24 | 0ce0e8f4 | Mark McLoughlin | #define VIRTIO_NET_VM_VERSION 11 |
25 | b6503ed9 | aliguori | |
26 | 4ffb17f5 | Alex Williamson | #define MAC_TABLE_ENTRIES 64 |
27 | f21c0ed9 | aliguori | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
28 | 9d6271b8 | aliguori | |
29 | 0c87e93e | Jason Wang | typedef struct VirtIONetQueue { |
30 | 0c87e93e | Jason Wang | VirtQueue *rx_vq; |
31 | 0c87e93e | Jason Wang | VirtQueue *tx_vq; |
32 | 0c87e93e | Jason Wang | QEMUTimer *tx_timer; |
33 | 0c87e93e | Jason Wang | QEMUBH *tx_bh; |
34 | 0c87e93e | Jason Wang | int tx_waiting;
|
35 | 0c87e93e | Jason Wang | struct {
|
36 | 0c87e93e | Jason Wang | VirtQueueElement elem; |
37 | 0c87e93e | Jason Wang | ssize_t len; |
38 | 0c87e93e | Jason Wang | } async_tx; |
39 | 0c87e93e | Jason Wang | struct VirtIONet *n;
|
40 | 0c87e93e | Jason Wang | } VirtIONetQueue; |
41 | 0c87e93e | Jason Wang | |
42 | fbe78f4f | aliguori | typedef struct VirtIONet |
43 | fbe78f4f | aliguori | { |
44 | fbe78f4f | aliguori | VirtIODevice vdev; |
45 | 79674068 | aliguori | uint8_t mac[ETH_ALEN]; |
46 | 554c97dd | aliguori | uint16_t status; |
47 | fed699f9 | Jason Wang | VirtIONetQueue vqs[MAX_QUEUE_NUM]; |
48 | 3d11d36c | aliguori | VirtQueue *ctrl_vq; |
49 | eb6b6c12 | Mark McLoughlin | NICState *nic; |
50 | f0c07c7c | Alex Williamson | uint32_t tx_timeout; |
51 | e3f30488 | Alex Williamson | int32_t tx_burst; |
52 | 3a330134 | Mark McLoughlin | uint32_t has_vnet_hdr; |
53 | e35e23f6 | Michael S. Tsirkin | size_t host_hdr_len; |
54 | e35e23f6 | Michael S. Tsirkin | size_t guest_hdr_len; |
55 | 0ce0e8f4 | Mark McLoughlin | uint8_t has_ufo; |
56 | fbe78f4f | aliguori | int mergeable_rx_bufs;
|
57 | f10c592e | Alex Williamson | uint8_t promisc; |
58 | f10c592e | Alex Williamson | uint8_t allmulti; |
59 | 015cb166 | Alex Williamson | uint8_t alluni; |
60 | 015cb166 | Alex Williamson | uint8_t nomulti; |
61 | 015cb166 | Alex Williamson | uint8_t nouni; |
62 | 015cb166 | Alex Williamson | uint8_t nobcast; |
63 | 9bc6304c | Michael S. Tsirkin | uint8_t vhost_started; |
64 | b6503ed9 | aliguori | struct {
|
65 | b6503ed9 | aliguori | int in_use;
|
66 | 2d9aba39 | Alex Williamson | int first_multi;
|
67 | 8fd2a2f1 | Alex Williamson | uint8_t multi_overflow; |
68 | 8fd2a2f1 | Alex Williamson | uint8_t uni_overflow; |
69 | b6503ed9 | aliguori | uint8_t *macs; |
70 | b6503ed9 | aliguori | } mac_table; |
71 | f21c0ed9 | aliguori | uint32_t *vlans; |
72 | 01657c86 | Alex Williamson | DeviceState *qdev; |
73 | fed699f9 | Jason Wang | int multiqueue;
|
74 | fed699f9 | Jason Wang | uint16_t max_queues; |
75 | fed699f9 | Jason Wang | uint16_t curr_queues; |
76 | fbe78f4f | aliguori | } VirtIONet; |
77 | fbe78f4f | aliguori | |
78 | fed699f9 | Jason Wang | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc)
|
79 | 0c87e93e | Jason Wang | { |
80 | 0c87e93e | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
81 | 0c87e93e | Jason Wang | |
82 | fed699f9 | Jason Wang | return &n->vqs[nc->queue_index];
|
83 | 0c87e93e | Jason Wang | } |
84 | fed699f9 | Jason Wang | |
85 | fed699f9 | Jason Wang | static int vq2q(int queue_index) |
86 | fed699f9 | Jason Wang | { |
87 | fed699f9 | Jason Wang | return queue_index / 2; |
88 | fed699f9 | Jason Wang | } |
89 | fed699f9 | Jason Wang | |
90 | fbe78f4f | aliguori | /* TODO
|
91 | fbe78f4f | aliguori | * - we could suppress RX interrupt if we were so inclined.
|
92 | fbe78f4f | aliguori | */
|
93 | fbe78f4f | aliguori | |
94 | fbe78f4f | aliguori | static VirtIONet *to_virtio_net(VirtIODevice *vdev)
|
95 | fbe78f4f | aliguori | { |
96 | fbe78f4f | aliguori | return (VirtIONet *)vdev;
|
97 | fbe78f4f | aliguori | } |
98 | fbe78f4f | aliguori | |
99 | 0f03eca6 | aliguori | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
100 | fbe78f4f | aliguori | { |
101 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
102 | fbe78f4f | aliguori | struct virtio_net_config netcfg;
|
103 | fbe78f4f | aliguori | |
104 | b46d97f2 | Stefan Hajnoczi | stw_p(&netcfg.status, n->status); |
105 | fed699f9 | Jason Wang | stw_p(&netcfg.max_virtqueue_pairs, n->max_queues); |
106 | 79674068 | aliguori | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
107 | fbe78f4f | aliguori | memcpy(config, &netcfg, sizeof(netcfg));
|
108 | fbe78f4f | aliguori | } |
109 | fbe78f4f | aliguori | |
110 | 0f03eca6 | aliguori | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
111 | 0f03eca6 | aliguori | { |
112 | 0f03eca6 | aliguori | VirtIONet *n = to_virtio_net(vdev); |
113 | 0f03eca6 | aliguori | struct virtio_net_config netcfg;
|
114 | 0f03eca6 | aliguori | |
115 | 0f03eca6 | aliguori | memcpy(&netcfg, config, sizeof(netcfg));
|
116 | 0f03eca6 | aliguori | |
117 | c1943a3f | Amos Kong | if (!(n->vdev.guest_features >> VIRTIO_NET_F_CTRL_MAC_ADDR & 1) && |
118 | c1943a3f | Amos Kong | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
119 | 79674068 | aliguori | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
120 | b356f76d | Jason Wang | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
121 | 0f03eca6 | aliguori | } |
122 | 0f03eca6 | aliguori | } |
123 | 0f03eca6 | aliguori | |
124 | 783e7706 | Michael S. Tsirkin | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
125 | 783e7706 | Michael S. Tsirkin | { |
126 | 783e7706 | Michael S. Tsirkin | return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
127 | 85cf2a8d | Michael S. Tsirkin | (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
128 | 783e7706 | Michael S. Tsirkin | } |
129 | 783e7706 | Michael S. Tsirkin | |
130 | 783e7706 | Michael S. Tsirkin | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
131 | afbaa7b4 | Michael S. Tsirkin | { |
132 | b356f76d | Jason Wang | NetClientState *nc = qemu_get_queue(n->nic); |
133 | fed699f9 | Jason Wang | int queues = n->multiqueue ? n->max_queues : 1; |
134 | b356f76d | Jason Wang | |
135 | b356f76d | Jason Wang | if (!nc->peer) {
|
136 | afbaa7b4 | Michael S. Tsirkin | return;
|
137 | afbaa7b4 | Michael S. Tsirkin | } |
138 | b356f76d | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
139 | afbaa7b4 | Michael S. Tsirkin | return;
|
140 | afbaa7b4 | Michael S. Tsirkin | } |
141 | afbaa7b4 | Michael S. Tsirkin | |
142 | b356f76d | Jason Wang | if (!tap_get_vhost_net(nc->peer)) {
|
143 | afbaa7b4 | Michael S. Tsirkin | return;
|
144 | afbaa7b4 | Michael S. Tsirkin | } |
145 | fed699f9 | Jason Wang | |
146 | 32993698 | Michael S. Tsirkin | if (!!n->vhost_started == virtio_net_started(n, status) &&
|
147 | b356f76d | Jason Wang | !nc->peer->link_down) { |
148 | afbaa7b4 | Michael S. Tsirkin | return;
|
149 | afbaa7b4 | Michael S. Tsirkin | } |
150 | afbaa7b4 | Michael S. Tsirkin | if (!n->vhost_started) {
|
151 | 5430a28f | mst@redhat.com | int r;
|
152 | b356f76d | Jason Wang | if (!vhost_net_query(tap_get_vhost_net(nc->peer), &n->vdev)) {
|
153 | 5430a28f | mst@redhat.com | return;
|
154 | 5430a28f | mst@redhat.com | } |
155 | 1830b80f | Michael S. Tsirkin | n->vhost_started = 1;
|
156 | fed699f9 | Jason Wang | r = vhost_net_start(&n->vdev, n->nic->ncs, queues); |
157 | afbaa7b4 | Michael S. Tsirkin | if (r < 0) { |
158 | e7b43f7e | Stefan Hajnoczi | error_report("unable to start vhost net: %d: "
|
159 | e7b43f7e | Stefan Hajnoczi | "falling back on userspace virtio", -r);
|
160 | 1830b80f | Michael S. Tsirkin | n->vhost_started = 0;
|
161 | afbaa7b4 | Michael S. Tsirkin | } |
162 | afbaa7b4 | Michael S. Tsirkin | } else {
|
163 | fed699f9 | Jason Wang | vhost_net_stop(&n->vdev, n->nic->ncs, queues); |
164 | afbaa7b4 | Michael S. Tsirkin | n->vhost_started = 0;
|
165 | afbaa7b4 | Michael S. Tsirkin | } |
166 | afbaa7b4 | Michael S. Tsirkin | } |
167 | afbaa7b4 | Michael S. Tsirkin | |
168 | 783e7706 | Michael S. Tsirkin | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
169 | 783e7706 | Michael S. Tsirkin | { |
170 | 783e7706 | Michael S. Tsirkin | VirtIONet *n = to_virtio_net(vdev); |
171 | fed699f9 | Jason Wang | VirtIONetQueue *q; |
172 | fed699f9 | Jason Wang | int i;
|
173 | fed699f9 | Jason Wang | uint8_t queue_status; |
174 | 783e7706 | Michael S. Tsirkin | |
175 | 783e7706 | Michael S. Tsirkin | virtio_net_vhost_status(n, status); |
176 | 783e7706 | Michael S. Tsirkin | |
177 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
178 | fed699f9 | Jason Wang | q = &n->vqs[i]; |
179 | 783e7706 | Michael S. Tsirkin | |
180 | fed699f9 | Jason Wang | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
181 | fed699f9 | Jason Wang | queue_status = 0;
|
182 | 783e7706 | Michael S. Tsirkin | } else {
|
183 | fed699f9 | Jason Wang | queue_status = status; |
184 | 783e7706 | Michael S. Tsirkin | } |
185 | fed699f9 | Jason Wang | |
186 | fed699f9 | Jason Wang | if (!q->tx_waiting) {
|
187 | fed699f9 | Jason Wang | continue;
|
188 | fed699f9 | Jason Wang | } |
189 | fed699f9 | Jason Wang | |
190 | fed699f9 | Jason Wang | if (virtio_net_started(n, queue_status) && !n->vhost_started) {
|
191 | fed699f9 | Jason Wang | if (q->tx_timer) {
|
192 | fed699f9 | Jason Wang | qemu_mod_timer(q->tx_timer, |
193 | fed699f9 | Jason Wang | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
194 | fed699f9 | Jason Wang | } else {
|
195 | fed699f9 | Jason Wang | qemu_bh_schedule(q->tx_bh); |
196 | fed699f9 | Jason Wang | } |
197 | 783e7706 | Michael S. Tsirkin | } else {
|
198 | fed699f9 | Jason Wang | if (q->tx_timer) {
|
199 | fed699f9 | Jason Wang | qemu_del_timer(q->tx_timer); |
200 | fed699f9 | Jason Wang | } else {
|
201 | fed699f9 | Jason Wang | qemu_bh_cancel(q->tx_bh); |
202 | fed699f9 | Jason Wang | } |
203 | 783e7706 | Michael S. Tsirkin | } |
204 | 783e7706 | Michael S. Tsirkin | } |
205 | 783e7706 | Michael S. Tsirkin | } |
206 | 783e7706 | Michael S. Tsirkin | |
207 | 4e68f7a0 | Stefan Hajnoczi | static void virtio_net_set_link_status(NetClientState *nc) |
208 | 554c97dd | aliguori | { |
209 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
210 | 554c97dd | aliguori | uint16_t old_status = n->status; |
211 | 554c97dd | aliguori | |
212 | eb6b6c12 | Mark McLoughlin | if (nc->link_down)
|
213 | 554c97dd | aliguori | n->status &= ~VIRTIO_NET_S_LINK_UP; |
214 | 554c97dd | aliguori | else
|
215 | 554c97dd | aliguori | n->status |= VIRTIO_NET_S_LINK_UP; |
216 | 554c97dd | aliguori | |
217 | 554c97dd | aliguori | if (n->status != old_status)
|
218 | 554c97dd | aliguori | virtio_notify_config(&n->vdev); |
219 | afbaa7b4 | Michael S. Tsirkin | |
220 | afbaa7b4 | Michael S. Tsirkin | virtio_net_set_status(&n->vdev, n->vdev.status); |
221 | 554c97dd | aliguori | } |
222 | 554c97dd | aliguori | |
223 | 002437cd | aliguori | static void virtio_net_reset(VirtIODevice *vdev) |
224 | 002437cd | aliguori | { |
225 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
226 | 002437cd | aliguori | |
227 | 002437cd | aliguori | /* Reset back to compatibility mode */
|
228 | 002437cd | aliguori | n->promisc = 1;
|
229 | 002437cd | aliguori | n->allmulti = 0;
|
230 | 015cb166 | Alex Williamson | n->alluni = 0;
|
231 | 015cb166 | Alex Williamson | n->nomulti = 0;
|
232 | 015cb166 | Alex Williamson | n->nouni = 0;
|
233 | 015cb166 | Alex Williamson | n->nobcast = 0;
|
234 | fed699f9 | Jason Wang | /* multiqueue is disabled by default */
|
235 | fed699f9 | Jason Wang | n->curr_queues = 1;
|
236 | b6503ed9 | aliguori | |
237 | f21c0ed9 | aliguori | /* Flush any MAC and VLAN filter table state */
|
238 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
239 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
|
240 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
|
241 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
|
242 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
243 | 41dc8a67 | Michael S. Tsirkin | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
244 | f21c0ed9 | aliguori | memset(n->vlans, 0, MAX_VLAN >> 3); |
245 | 002437cd | aliguori | } |
246 | 002437cd | aliguori | |
247 | 6e371ab8 | Michael S. Tsirkin | static void peer_test_vnet_hdr(VirtIONet *n) |
248 | 3a330134 | Mark McLoughlin | { |
249 | b356f76d | Jason Wang | NetClientState *nc = qemu_get_queue(n->nic); |
250 | b356f76d | Jason Wang | if (!nc->peer) {
|
251 | 6e371ab8 | Michael S. Tsirkin | return;
|
252 | b356f76d | Jason Wang | } |
253 | 3a330134 | Mark McLoughlin | |
254 | b356f76d | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
255 | 6e371ab8 | Michael S. Tsirkin | return;
|
256 | b356f76d | Jason Wang | } |
257 | 3a330134 | Mark McLoughlin | |
258 | b356f76d | Jason Wang | n->has_vnet_hdr = tap_has_vnet_hdr(nc->peer); |
259 | 6e371ab8 | Michael S. Tsirkin | } |
260 | 3a330134 | Mark McLoughlin | |
261 | 6e371ab8 | Michael S. Tsirkin | static int peer_has_vnet_hdr(VirtIONet *n) |
262 | 6e371ab8 | Michael S. Tsirkin | { |
263 | 3a330134 | Mark McLoughlin | return n->has_vnet_hdr;
|
264 | 3a330134 | Mark McLoughlin | } |
265 | 3a330134 | Mark McLoughlin | |
266 | 0ce0e8f4 | Mark McLoughlin | static int peer_has_ufo(VirtIONet *n) |
267 | 0ce0e8f4 | Mark McLoughlin | { |
268 | 0ce0e8f4 | Mark McLoughlin | if (!peer_has_vnet_hdr(n))
|
269 | 0ce0e8f4 | Mark McLoughlin | return 0; |
270 | 0ce0e8f4 | Mark McLoughlin | |
271 | b356f76d | Jason Wang | n->has_ufo = tap_has_ufo(qemu_get_queue(n->nic)->peer); |
272 | 0ce0e8f4 | Mark McLoughlin | |
273 | 0ce0e8f4 | Mark McLoughlin | return n->has_ufo;
|
274 | 0ce0e8f4 | Mark McLoughlin | } |
275 | 0ce0e8f4 | Mark McLoughlin | |
276 | ff3a8066 | Michael S. Tsirkin | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) |
277 | ff3a8066 | Michael S. Tsirkin | { |
278 | fed699f9 | Jason Wang | int i;
|
279 | fed699f9 | Jason Wang | NetClientState *nc; |
280 | fed699f9 | Jason Wang | |
281 | ff3a8066 | Michael S. Tsirkin | n->mergeable_rx_bufs = mergeable_rx_bufs; |
282 | ff3a8066 | Michael S. Tsirkin | |
283 | ff3a8066 | Michael S. Tsirkin | n->guest_hdr_len = n->mergeable_rx_bufs ? |
284 | ff3a8066 | Michael S. Tsirkin | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
285 | ff3a8066 | Michael S. Tsirkin | |
286 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
287 | fed699f9 | Jason Wang | nc = qemu_get_subqueue(n->nic, i); |
288 | fed699f9 | Jason Wang | |
289 | fed699f9 | Jason Wang | if (peer_has_vnet_hdr(n) &&
|
290 | fed699f9 | Jason Wang | tap_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { |
291 | fed699f9 | Jason Wang | tap_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); |
292 | fed699f9 | Jason Wang | n->host_hdr_len = n->guest_hdr_len; |
293 | fed699f9 | Jason Wang | } |
294 | ff3a8066 | Michael S. Tsirkin | } |
295 | ff3a8066 | Michael S. Tsirkin | } |
296 | ff3a8066 | Michael S. Tsirkin | |
297 | fed699f9 | Jason Wang | static int peer_attach(VirtIONet *n, int index) |
298 | fed699f9 | Jason Wang | { |
299 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, index); |
300 | fed699f9 | Jason Wang | |
301 | fed699f9 | Jason Wang | if (!nc->peer) {
|
302 | fed699f9 | Jason Wang | return 0; |
303 | fed699f9 | Jason Wang | } |
304 | fed699f9 | Jason Wang | |
305 | fed699f9 | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
306 | fed699f9 | Jason Wang | return 0; |
307 | fed699f9 | Jason Wang | } |
308 | fed699f9 | Jason Wang | |
309 | fed699f9 | Jason Wang | return tap_enable(nc->peer);
|
310 | fed699f9 | Jason Wang | } |
311 | fed699f9 | Jason Wang | |
312 | fed699f9 | Jason Wang | static int peer_detach(VirtIONet *n, int index) |
313 | fed699f9 | Jason Wang | { |
314 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, index); |
315 | fed699f9 | Jason Wang | |
316 | fed699f9 | Jason Wang | if (!nc->peer) {
|
317 | fed699f9 | Jason Wang | return 0; |
318 | fed699f9 | Jason Wang | } |
319 | fed699f9 | Jason Wang | |
320 | fed699f9 | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
321 | fed699f9 | Jason Wang | return 0; |
322 | fed699f9 | Jason Wang | } |
323 | fed699f9 | Jason Wang | |
324 | fed699f9 | Jason Wang | return tap_disable(nc->peer);
|
325 | fed699f9 | Jason Wang | } |
326 | fed699f9 | Jason Wang | |
327 | fed699f9 | Jason Wang | static void virtio_net_set_queues(VirtIONet *n) |
328 | fed699f9 | Jason Wang | { |
329 | fed699f9 | Jason Wang | int i;
|
330 | fed699f9 | Jason Wang | |
331 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
332 | fed699f9 | Jason Wang | if (i < n->curr_queues) {
|
333 | fed699f9 | Jason Wang | assert(!peer_attach(n, i)); |
334 | fed699f9 | Jason Wang | } else {
|
335 | fed699f9 | Jason Wang | assert(!peer_detach(n, i)); |
336 | fed699f9 | Jason Wang | } |
337 | fed699f9 | Jason Wang | } |
338 | fed699f9 | Jason Wang | } |
339 | fed699f9 | Jason Wang | |
340 | fed699f9 | Jason Wang | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl); |
341 | fed699f9 | Jason Wang | |
342 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
|
343 | fbe78f4f | aliguori | { |
344 | 3a330134 | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
345 | b356f76d | Jason Wang | NetClientState *nc = qemu_get_queue(n->nic); |
346 | fbe78f4f | aliguori | |
347 | c9f79a3f | Michael S. Tsirkin | features |= (1 << VIRTIO_NET_F_MAC);
|
348 | c9f79a3f | Michael S. Tsirkin | |
349 | 6e371ab8 | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n)) {
|
350 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_CSUM);
|
351 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
|
352 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
|
353 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
|
354 | 8172539d | Michael S. Tsirkin | |
355 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
|
356 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
|
357 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
|
358 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
|
359 | 8172539d | Michael S. Tsirkin | } |
360 | 3a330134 | Mark McLoughlin | |
361 | 8172539d | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
|
362 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
|
363 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
|
364 | 3a330134 | Mark McLoughlin | } |
365 | 3a330134 | Mark McLoughlin | |
366 | b356f76d | Jason Wang | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
367 | 9bc6304c | Michael S. Tsirkin | return features;
|
368 | 9bc6304c | Michael S. Tsirkin | } |
369 | b356f76d | Jason Wang | if (!tap_get_vhost_net(nc->peer)) {
|
370 | 9bc6304c | Michael S. Tsirkin | return features;
|
371 | 9bc6304c | Michael S. Tsirkin | } |
372 | b356f76d | Jason Wang | return vhost_net_get_features(tap_get_vhost_net(nc->peer), features);
|
373 | fbe78f4f | aliguori | } |
374 | fbe78f4f | aliguori | |
375 | 8eca6b1b | aliguori | static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
|
376 | 8eca6b1b | aliguori | { |
377 | 8eca6b1b | aliguori | uint32_t features = 0;
|
378 | 8eca6b1b | aliguori | |
379 | 8eca6b1b | aliguori | /* Linux kernel 2.6.25. It understood MAC (as everyone must),
|
380 | 8eca6b1b | aliguori | * but also these: */
|
381 | 8eca6b1b | aliguori | features |= (1 << VIRTIO_NET_F_MAC);
|
382 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_CSUM);
|
383 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO4);
|
384 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO6);
|
385 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_ECN);
|
386 | 8eca6b1b | aliguori | |
387 | 8172539d | Michael S. Tsirkin | return features;
|
388 | 8eca6b1b | aliguori | } |
389 | 8eca6b1b | aliguori | |
390 | fbe78f4f | aliguori | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
391 | fbe78f4f | aliguori | { |
392 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
393 | fed699f9 | Jason Wang | int i;
|
394 | fed699f9 | Jason Wang | |
395 | fed699f9 | Jason Wang | virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ)),
|
396 | fed699f9 | Jason Wang | !!(features & (1 << VIRTIO_NET_F_CTRL_VQ)));
|
397 | fbe78f4f | aliguori | |
398 | ff3a8066 | Michael S. Tsirkin | virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)));
|
399 | f5436dd9 | Mark McLoughlin | |
400 | f5436dd9 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
401 | fed699f9 | Jason Wang | tap_set_offload(qemu_get_subqueue(n->nic, 0)->peer,
|
402 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
403 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
404 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
405 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
406 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
407 | f5436dd9 | Mark McLoughlin | } |
408 | fed699f9 | Jason Wang | |
409 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
410 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, i); |
411 | fed699f9 | Jason Wang | |
412 | fed699f9 | Jason Wang | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
413 | fed699f9 | Jason Wang | continue;
|
414 | fed699f9 | Jason Wang | } |
415 | fed699f9 | Jason Wang | if (!tap_get_vhost_net(nc->peer)) {
|
416 | fed699f9 | Jason Wang | continue;
|
417 | fed699f9 | Jason Wang | } |
418 | fed699f9 | Jason Wang | vhost_net_ack_features(tap_get_vhost_net(nc->peer), features); |
419 | dc14a397 | David L Stevens | } |
420 | fbe78f4f | aliguori | } |
421 | fbe78f4f | aliguori | |
422 | 002437cd | aliguori | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
423 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov, unsigned int iov_cnt) |
424 | 002437cd | aliguori | { |
425 | 002437cd | aliguori | uint8_t on; |
426 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
427 | 002437cd | aliguori | |
428 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
429 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(on)) { |
430 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
431 | 002437cd | aliguori | } |
432 | 002437cd | aliguori | |
433 | dd23454b | Amos Kong | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) {
|
434 | 002437cd | aliguori | n->promisc = on; |
435 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
436 | 002437cd | aliguori | n->allmulti = on; |
437 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
438 | 015cb166 | Alex Williamson | n->alluni = on; |
439 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
440 | 015cb166 | Alex Williamson | n->nomulti = on; |
441 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
442 | 015cb166 | Alex Williamson | n->nouni = on; |
443 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
444 | 015cb166 | Alex Williamson | n->nobcast = on; |
445 | 921ac5d0 | Michael S. Tsirkin | } else {
|
446 | 002437cd | aliguori | return VIRTIO_NET_ERR;
|
447 | 921ac5d0 | Michael S. Tsirkin | } |
448 | 002437cd | aliguori | |
449 | 002437cd | aliguori | return VIRTIO_NET_OK;
|
450 | 002437cd | aliguori | } |
451 | 002437cd | aliguori | |
452 | b6503ed9 | aliguori | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
453 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov, unsigned int iov_cnt) |
454 | b6503ed9 | aliguori | { |
455 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac mac_data;
|
456 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
457 | b6503ed9 | aliguori | |
458 | c1943a3f | Amos Kong | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) {
|
459 | c1943a3f | Amos Kong | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { |
460 | c1943a3f | Amos Kong | return VIRTIO_NET_ERR;
|
461 | c1943a3f | Amos Kong | } |
462 | c1943a3f | Amos Kong | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); |
463 | c1943a3f | Amos Kong | assert(s == sizeof(n->mac));
|
464 | b356f76d | Jason Wang | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
465 | c1943a3f | Amos Kong | return VIRTIO_NET_OK;
|
466 | c1943a3f | Amos Kong | } |
467 | c1943a3f | Amos Kong | |
468 | 921ac5d0 | Michael S. Tsirkin | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) {
|
469 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
470 | 921ac5d0 | Michael S. Tsirkin | } |
471 | b6503ed9 | aliguori | |
472 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
473 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
|
474 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
|
475 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
|
476 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
477 | b6503ed9 | aliguori | |
478 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
|
479 | 921ac5d0 | Michael S. Tsirkin | sizeof(mac_data.entries));
|
480 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries = ldl_p(&mac_data.entries); |
481 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(mac_data.entries)) { |
482 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
483 | 921ac5d0 | Michael S. Tsirkin | } |
484 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, s); |
485 | b6503ed9 | aliguori | |
486 | 921ac5d0 | Michael S. Tsirkin | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) {
|
487 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
488 | 921ac5d0 | Michael S. Tsirkin | } |
489 | b6503ed9 | aliguori | |
490 | b6503ed9 | aliguori | if (mac_data.entries <= MAC_TABLE_ENTRIES) {
|
491 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs,
|
492 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries * ETH_ALEN); |
493 | 921ac5d0 | Michael S. Tsirkin | if (s != mac_data.entries * ETH_ALEN) {
|
494 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
495 | 921ac5d0 | Michael S. Tsirkin | } |
496 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
497 | b6503ed9 | aliguori | } else {
|
498 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 1;
|
499 | b6503ed9 | aliguori | } |
500 | b6503ed9 | aliguori | |
501 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
502 | 921ac5d0 | Michael S. Tsirkin | |
503 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = n->mac_table.in_use; |
504 | 2d9aba39 | Alex Williamson | |
505 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
|
506 | 921ac5d0 | Michael S. Tsirkin | sizeof(mac_data.entries));
|
507 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries = ldl_p(&mac_data.entries); |
508 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(mac_data.entries)) { |
509 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
510 | 921ac5d0 | Michael S. Tsirkin | } |
511 | 921ac5d0 | Michael S. Tsirkin | |
512 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, s); |
513 | b6503ed9 | aliguori | |
514 | 921ac5d0 | Michael S. Tsirkin | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) {
|
515 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
516 | 921ac5d0 | Michael S. Tsirkin | } |
517 | b6503ed9 | aliguori | |
518 | 921ac5d0 | Michael S. Tsirkin | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
|
519 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs,
|
520 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries * ETH_ALEN); |
521 | 921ac5d0 | Michael S. Tsirkin | if (s != mac_data.entries * ETH_ALEN) {
|
522 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
523 | 8fd2a2f1 | Alex Williamson | } |
524 | 921ac5d0 | Michael S. Tsirkin | n->mac_table.in_use += mac_data.entries; |
525 | 921ac5d0 | Michael S. Tsirkin | } else {
|
526 | 921ac5d0 | Michael S. Tsirkin | n->mac_table.multi_overflow = 1;
|
527 | b6503ed9 | aliguori | } |
528 | b6503ed9 | aliguori | |
529 | b6503ed9 | aliguori | return VIRTIO_NET_OK;
|
530 | b6503ed9 | aliguori | } |
531 | b6503ed9 | aliguori | |
532 | f21c0ed9 | aliguori | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
533 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov, unsigned int iov_cnt) |
534 | f21c0ed9 | aliguori | { |
535 | f21c0ed9 | aliguori | uint16_t vid; |
536 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
537 | f21c0ed9 | aliguori | |
538 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
539 | 921ac5d0 | Michael S. Tsirkin | vid = lduw_p(&vid); |
540 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(vid)) { |
541 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
542 | f21c0ed9 | aliguori | } |
543 | f21c0ed9 | aliguori | |
544 | f21c0ed9 | aliguori | if (vid >= MAX_VLAN)
|
545 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
546 | f21c0ed9 | aliguori | |
547 | f21c0ed9 | aliguori | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
548 | f21c0ed9 | aliguori | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
549 | f21c0ed9 | aliguori | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
550 | f21c0ed9 | aliguori | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
551 | f21c0ed9 | aliguori | else
|
552 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
553 | f21c0ed9 | aliguori | |
554 | f21c0ed9 | aliguori | return VIRTIO_NET_OK;
|
555 | f21c0ed9 | aliguori | } |
556 | f21c0ed9 | aliguori | |
557 | fed699f9 | Jason Wang | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
558 | fed699f9 | Jason Wang | VirtQueueElement *elem) |
559 | fed699f9 | Jason Wang | { |
560 | fed699f9 | Jason Wang | struct virtio_net_ctrl_mq s;
|
561 | fed699f9 | Jason Wang | |
562 | fed699f9 | Jason Wang | if (elem->out_num != 2 || |
563 | fed699f9 | Jason Wang | elem->out_sg[1].iov_len != sizeof(struct virtio_net_ctrl_mq)) { |
564 | fed699f9 | Jason Wang | error_report("virtio-net ctrl invalid steering command");
|
565 | fed699f9 | Jason Wang | return VIRTIO_NET_ERR;
|
566 | fed699f9 | Jason Wang | } |
567 | fed699f9 | Jason Wang | |
568 | fed699f9 | Jason Wang | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
|
569 | fed699f9 | Jason Wang | return VIRTIO_NET_ERR;
|
570 | fed699f9 | Jason Wang | } |
571 | fed699f9 | Jason Wang | |
572 | fed699f9 | Jason Wang | memcpy(&s, elem->out_sg[1].iov_base, sizeof(struct virtio_net_ctrl_mq)); |
573 | fed699f9 | Jason Wang | |
574 | fed699f9 | Jason Wang | if (s.virtqueue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
|
575 | fed699f9 | Jason Wang | s.virtqueue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || |
576 | fed699f9 | Jason Wang | s.virtqueue_pairs > n->max_queues || |
577 | fed699f9 | Jason Wang | !n->multiqueue) { |
578 | fed699f9 | Jason Wang | return VIRTIO_NET_ERR;
|
579 | fed699f9 | Jason Wang | } |
580 | fed699f9 | Jason Wang | |
581 | fed699f9 | Jason Wang | n->curr_queues = s.virtqueue_pairs; |
582 | fed699f9 | Jason Wang | /* stop the backend before changing the number of queues to avoid handling a
|
583 | fed699f9 | Jason Wang | * disabled queue */
|
584 | fed699f9 | Jason Wang | virtio_net_set_status(&n->vdev, n->vdev.status); |
585 | fed699f9 | Jason Wang | virtio_net_set_queues(n); |
586 | fed699f9 | Jason Wang | |
587 | fed699f9 | Jason Wang | return VIRTIO_NET_OK;
|
588 | fed699f9 | Jason Wang | } |
589 | 3d11d36c | aliguori | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
590 | 3d11d36c | aliguori | { |
591 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
592 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr ctrl;
|
593 | 3d11d36c | aliguori | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
594 | 3d11d36c | aliguori | VirtQueueElement elem; |
595 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
596 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov;
|
597 | 921ac5d0 | Michael S. Tsirkin | unsigned int iov_cnt; |
598 | 3d11d36c | aliguori | |
599 | 3d11d36c | aliguori | while (virtqueue_pop(vq, &elem)) {
|
600 | 921ac5d0 | Michael S. Tsirkin | if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || |
601 | 921ac5d0 | Michael S. Tsirkin | iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) {
|
602 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net ctrl missing headers");
|
603 | 3d11d36c | aliguori | exit(1);
|
604 | 3d11d36c | aliguori | } |
605 | 3d11d36c | aliguori | |
606 | 921ac5d0 | Michael S. Tsirkin | iov = elem.out_sg; |
607 | 921ac5d0 | Michael S. Tsirkin | iov_cnt = elem.out_num; |
608 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); |
609 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl));
|
610 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(ctrl)) { |
611 | 921ac5d0 | Michael S. Tsirkin | status = VIRTIO_NET_ERR; |
612 | dd23454b | Amos Kong | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
613 | 921ac5d0 | Michael S. Tsirkin | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
614 | 921ac5d0 | Michael S. Tsirkin | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { |
615 | 921ac5d0 | Michael S. Tsirkin | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); |
616 | 921ac5d0 | Michael S. Tsirkin | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { |
617 | 921ac5d0 | Michael S. Tsirkin | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); |
618 | fed699f9 | Jason Wang | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
619 | fed699f9 | Jason Wang | status = virtio_net_handle_mq(n, ctrl.cmd, &elem); |
620 | 3d11d36c | aliguori | } |
621 | 3d11d36c | aliguori | |
622 | 921ac5d0 | Michael S. Tsirkin | s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); |
623 | 921ac5d0 | Michael S. Tsirkin | assert(s == sizeof(status));
|
624 | 3d11d36c | aliguori | |
625 | 3d11d36c | aliguori | virtqueue_push(vq, &elem, sizeof(status));
|
626 | 3d11d36c | aliguori | virtio_notify(vdev, vq); |
627 | 3d11d36c | aliguori | } |
628 | 3d11d36c | aliguori | } |
629 | 3d11d36c | aliguori | |
630 | fbe78f4f | aliguori | /* RX */
|
631 | fbe78f4f | aliguori | |
632 | fbe78f4f | aliguori | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
633 | fbe78f4f | aliguori | { |
634 | 8aeff62d | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
635 | fed699f9 | Jason Wang | int queue_index = vq2q(virtio_get_queue_index(vq));
|
636 | 8aeff62d | Mark McLoughlin | |
637 | fed699f9 | Jason Wang | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
638 | fbe78f4f | aliguori | } |
639 | fbe78f4f | aliguori | |
640 | 4e68f7a0 | Stefan Hajnoczi | static int virtio_net_can_receive(NetClientState *nc) |
641 | fbe78f4f | aliguori | { |
642 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
643 | fed699f9 | Jason Wang | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
644 | 0c87e93e | Jason Wang | |
645 | 85cf2a8d | Michael S. Tsirkin | if (!n->vdev.vm_running) {
|
646 | 95477323 | Michael S. Tsirkin | return 0; |
647 | 95477323 | Michael S. Tsirkin | } |
648 | cdd5cc12 | Mark McLoughlin | |
649 | fed699f9 | Jason Wang | if (nc->queue_index >= n->curr_queues) {
|
650 | fed699f9 | Jason Wang | return 0; |
651 | fed699f9 | Jason Wang | } |
652 | fed699f9 | Jason Wang | |
653 | 0c87e93e | Jason Wang | if (!virtio_queue_ready(q->rx_vq) ||
|
654 | 0c87e93e | Jason Wang | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
655 | fbe78f4f | aliguori | return 0; |
656 | 0c87e93e | Jason Wang | } |
657 | fbe78f4f | aliguori | |
658 | cdd5cc12 | Mark McLoughlin | return 1; |
659 | cdd5cc12 | Mark McLoughlin | } |
660 | cdd5cc12 | Mark McLoughlin | |
661 | 0c87e93e | Jason Wang | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
662 | cdd5cc12 | Mark McLoughlin | { |
663 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
664 | 0c87e93e | Jason Wang | if (virtio_queue_empty(q->rx_vq) ||
|
665 | fbe78f4f | aliguori | (n->mergeable_rx_bufs && |
666 | 0c87e93e | Jason Wang | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
|
667 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->rx_vq, 1);
|
668 | 06b12970 | Tom Lendacky | |
669 | 06b12970 | Tom Lendacky | /* To avoid a race condition where the guest has made some buffers
|
670 | 06b12970 | Tom Lendacky | * available after the above check but before notification was
|
671 | 06b12970 | Tom Lendacky | * enabled, check for available buffers again.
|
672 | 06b12970 | Tom Lendacky | */
|
673 | 0c87e93e | Jason Wang | if (virtio_queue_empty(q->rx_vq) ||
|
674 | 06b12970 | Tom Lendacky | (n->mergeable_rx_bufs && |
675 | 0c87e93e | Jason Wang | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
|
676 | 06b12970 | Tom Lendacky | return 0; |
677 | 0c87e93e | Jason Wang | } |
678 | fbe78f4f | aliguori | } |
679 | fbe78f4f | aliguori | |
680 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->rx_vq, 0);
|
681 | fbe78f4f | aliguori | return 1; |
682 | fbe78f4f | aliguori | } |
683 | fbe78f4f | aliguori | |
684 | 1d41b0c1 | Anthony Liguori | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
685 | 1d41b0c1 | Anthony Liguori | * it never finds out that the packets don't have valid checksums. This
|
686 | 1d41b0c1 | Anthony Liguori | * causes dhclient to get upset. Fedora's carried a patch for ages to
|
687 | 1d41b0c1 | Anthony Liguori | * fix this with Xen but it hasn't appeared in an upstream release of
|
688 | 1d41b0c1 | Anthony Liguori | * dhclient yet.
|
689 | 1d41b0c1 | Anthony Liguori | *
|
690 | 1d41b0c1 | Anthony Liguori | * To avoid breaking existing guests, we catch udp packets and add
|
691 | 1d41b0c1 | Anthony Liguori | * checksums. This is terrible but it's better than hacking the guest
|
692 | 1d41b0c1 | Anthony Liguori | * kernels.
|
693 | 1d41b0c1 | Anthony Liguori | *
|
694 | 1d41b0c1 | Anthony Liguori | * N.B. if we introduce a zero-copy API, this operation is no longer free so
|
695 | 1d41b0c1 | Anthony Liguori | * we should provide a mechanism to disable it to avoid polluting the host
|
696 | 1d41b0c1 | Anthony Liguori | * cache.
|
697 | 1d41b0c1 | Anthony Liguori | */
|
698 | 1d41b0c1 | Anthony Liguori | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
699 | 22cc84db | Michael S. Tsirkin | uint8_t *buf, size_t size) |
700 | 1d41b0c1 | Anthony Liguori | { |
701 | 1d41b0c1 | Anthony Liguori | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
702 | 1d41b0c1 | Anthony Liguori | (size > 27 && size < 1500) && /* normal sized MTU */ |
703 | 1d41b0c1 | Anthony Liguori | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
704 | 1d41b0c1 | Anthony Liguori | (buf[23] == 17) && /* ip.protocol == UDP */ |
705 | 1d41b0c1 | Anthony Liguori | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
706 | 22cc84db | Michael S. Tsirkin | net_checksum_calculate(buf, size); |
707 | 1d41b0c1 | Anthony Liguori | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
708 | 1d41b0c1 | Anthony Liguori | } |
709 | 1d41b0c1 | Anthony Liguori | } |
710 | 1d41b0c1 | Anthony Liguori | |
711 | 280598b7 | Michael S. Tsirkin | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
712 | 280598b7 | Michael S. Tsirkin | const void *buf, size_t size) |
713 | fbe78f4f | aliguori | { |
714 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
715 | 22cc84db | Michael S. Tsirkin | /* FIXME this cast is evil */
|
716 | 22cc84db | Michael S. Tsirkin | void *wbuf = (void *)buf; |
717 | 280598b7 | Michael S. Tsirkin | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
718 | 280598b7 | Michael S. Tsirkin | size - n->host_hdr_len); |
719 | 280598b7 | Michael S. Tsirkin | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); |
720 | 22cc84db | Michael S. Tsirkin | } else {
|
721 | 22cc84db | Michael S. Tsirkin | struct virtio_net_hdr hdr = {
|
722 | 22cc84db | Michael S. Tsirkin | .flags = 0,
|
723 | 22cc84db | Michael S. Tsirkin | .gso_type = VIRTIO_NET_HDR_GSO_NONE |
724 | 22cc84db | Michael S. Tsirkin | }; |
725 | 22cc84db | Michael S. Tsirkin | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); |
726 | 3a330134 | Mark McLoughlin | } |
727 | fbe78f4f | aliguori | } |
728 | fbe78f4f | aliguori | |
729 | 3831ab20 | aliguori | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
730 | 3831ab20 | aliguori | { |
731 | 3831ab20 | aliguori | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
732 | f21c0ed9 | aliguori | static const uint8_t vlan[] = {0x81, 0x00}; |
733 | 3831ab20 | aliguori | uint8_t *ptr = (uint8_t *)buf; |
734 | b6503ed9 | aliguori | int i;
|
735 | 3831ab20 | aliguori | |
736 | 3831ab20 | aliguori | if (n->promisc)
|
737 | 3831ab20 | aliguori | return 1; |
738 | 3831ab20 | aliguori | |
739 | e043ebc6 | Michael S. Tsirkin | ptr += n->host_hdr_len; |
740 | 3a330134 | Mark McLoughlin | |
741 | f21c0ed9 | aliguori | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
742 | f21c0ed9 | aliguori | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
743 | f21c0ed9 | aliguori | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
744 | f21c0ed9 | aliguori | return 0; |
745 | f21c0ed9 | aliguori | } |
746 | f21c0ed9 | aliguori | |
747 | bbe2f399 | Alex Williamson | if (ptr[0] & 1) { // multicast |
748 | bbe2f399 | Alex Williamson | if (!memcmp(ptr, bcast, sizeof(bcast))) { |
749 | 015cb166 | Alex Williamson | return !n->nobcast;
|
750 | 015cb166 | Alex Williamson | } else if (n->nomulti) { |
751 | 015cb166 | Alex Williamson | return 0; |
752 | 8fd2a2f1 | Alex Williamson | } else if (n->allmulti || n->mac_table.multi_overflow) { |
753 | bbe2f399 | Alex Williamson | return 1; |
754 | bbe2f399 | Alex Williamson | } |
755 | 2d9aba39 | Alex Williamson | |
756 | 2d9aba39 | Alex Williamson | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
757 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
758 | 2d9aba39 | Alex Williamson | return 1; |
759 | 2d9aba39 | Alex Williamson | } |
760 | 2d9aba39 | Alex Williamson | } |
761 | bbe2f399 | Alex Williamson | } else { // unicast |
762 | 015cb166 | Alex Williamson | if (n->nouni) {
|
763 | 015cb166 | Alex Williamson | return 0; |
764 | 015cb166 | Alex Williamson | } else if (n->alluni || n->mac_table.uni_overflow) { |
765 | 8fd2a2f1 | Alex Williamson | return 1; |
766 | 8fd2a2f1 | Alex Williamson | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
767 | bbe2f399 | Alex Williamson | return 1; |
768 | bbe2f399 | Alex Williamson | } |
769 | 3831ab20 | aliguori | |
770 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.first_multi; i++) { |
771 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
772 | 2d9aba39 | Alex Williamson | return 1; |
773 | 2d9aba39 | Alex Williamson | } |
774 | 2d9aba39 | Alex Williamson | } |
775 | b6503ed9 | aliguori | } |
776 | b6503ed9 | aliguori | |
777 | 3831ab20 | aliguori | return 0; |
778 | 3831ab20 | aliguori | } |
779 | 3831ab20 | aliguori | |
780 | 4e68f7a0 | Stefan Hajnoczi | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
781 | fbe78f4f | aliguori | { |
782 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
783 | fed699f9 | Jason Wang | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
784 | 63c58728 | Michael S. Tsirkin | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE];
|
785 | 63c58728 | Michael S. Tsirkin | struct virtio_net_hdr_mrg_rxbuf mhdr;
|
786 | 63c58728 | Michael S. Tsirkin | unsigned mhdr_cnt = 0; |
787 | 22cc84db | Michael S. Tsirkin | size_t offset, i, guest_offset; |
788 | fbe78f4f | aliguori | |
789 | fed699f9 | Jason Wang | if (!virtio_net_can_receive(nc)) {
|
790 | cdd5cc12 | Mark McLoughlin | return -1; |
791 | b356f76d | Jason Wang | } |
792 | cdd5cc12 | Mark McLoughlin | |
793 | 940cda94 | Michael S. Tsirkin | /* hdr_len refers to the header we supply to the guest */
|
794 | 0c87e93e | Jason Wang | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) {
|
795 | 8aeff62d | Mark McLoughlin | return 0; |
796 | 0c87e93e | Jason Wang | } |
797 | fbe78f4f | aliguori | |
798 | 3831ab20 | aliguori | if (!receive_filter(n, buf, size))
|
799 | 4f1c942b | Mark McLoughlin | return size;
|
800 | 3831ab20 | aliguori | |
801 | fbe78f4f | aliguori | offset = i = 0;
|
802 | fbe78f4f | aliguori | |
803 | fbe78f4f | aliguori | while (offset < size) {
|
804 | fbe78f4f | aliguori | VirtQueueElement elem; |
805 | fbe78f4f | aliguori | int len, total;
|
806 | 22cc84db | Michael S. Tsirkin | const struct iovec *sg = elem.in_sg; |
807 | fbe78f4f | aliguori | |
808 | 22c253d9 | Amit Shah | total = 0;
|
809 | fbe78f4f | aliguori | |
810 | 0c87e93e | Jason Wang | if (virtqueue_pop(q->rx_vq, &elem) == 0) { |
811 | fbe78f4f | aliguori | if (i == 0) |
812 | 4f1c942b | Mark McLoughlin | return -1; |
813 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net unexpected empty queue: "
|
814 | 279a4253 | Michael S. Tsirkin | "i %zd mergeable %d offset %zd, size %zd, "
|
815 | e7b43f7e | Stefan Hajnoczi | "guest hdr len %zd, host hdr len %zd guest features 0x%x",
|
816 | 279a4253 | Michael S. Tsirkin | i, n->mergeable_rx_bufs, offset, size, |
817 | e35e23f6 | Michael S. Tsirkin | n->guest_hdr_len, n->host_hdr_len, n->vdev.guest_features); |
818 | fbe78f4f | aliguori | exit(1);
|
819 | fbe78f4f | aliguori | } |
820 | fbe78f4f | aliguori | |
821 | fbe78f4f | aliguori | if (elem.in_num < 1) { |
822 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net receive queue contains no in buffers");
|
823 | fbe78f4f | aliguori | exit(1);
|
824 | fbe78f4f | aliguori | } |
825 | fbe78f4f | aliguori | |
826 | fbe78f4f | aliguori | if (i == 0) { |
827 | c8d28e7e | Michael S. Tsirkin | assert(offset == 0);
|
828 | 63c58728 | Michael S. Tsirkin | if (n->mergeable_rx_bufs) {
|
829 | 63c58728 | Michael S. Tsirkin | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), |
830 | 63c58728 | Michael S. Tsirkin | sg, elem.in_num, |
831 | 63c58728 | Michael S. Tsirkin | offsetof(typeof(mhdr), num_buffers), |
832 | 63c58728 | Michael S. Tsirkin | sizeof(mhdr.num_buffers));
|
833 | 63c58728 | Michael S. Tsirkin | } |
834 | fbe78f4f | aliguori | |
835 | c8d28e7e | Michael S. Tsirkin | receive_header(n, sg, elem.in_num, buf, size); |
836 | c8d28e7e | Michael S. Tsirkin | offset = n->host_hdr_len; |
837 | e35e23f6 | Michael S. Tsirkin | total += n->guest_hdr_len; |
838 | 22cc84db | Michael S. Tsirkin | guest_offset = n->guest_hdr_len; |
839 | 22cc84db | Michael S. Tsirkin | } else {
|
840 | 22cc84db | Michael S. Tsirkin | guest_offset = 0;
|
841 | fbe78f4f | aliguori | } |
842 | fbe78f4f | aliguori | |
843 | fbe78f4f | aliguori | /* copy in packet. ugh */
|
844 | 22cc84db | Michael S. Tsirkin | len = iov_from_buf(sg, elem.in_num, guest_offset, |
845 | dcf6f5e1 | Michael Tokarev | buf + offset, size - offset); |
846 | fbe78f4f | aliguori | total += len; |
847 | 279a4253 | Michael S. Tsirkin | offset += len; |
848 | 279a4253 | Michael S. Tsirkin | /* If buffers can't be merged, at this point we
|
849 | 279a4253 | Michael S. Tsirkin | * must have consumed the complete packet.
|
850 | 279a4253 | Michael S. Tsirkin | * Otherwise, drop it. */
|
851 | 279a4253 | Michael S. Tsirkin | if (!n->mergeable_rx_bufs && offset < size) {
|
852 | 279a4253 | Michael S. Tsirkin | #if 0
|
853 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net truncated non-mergeable packet: "
|
854 | e7b43f7e | Stefan Hajnoczi | "i %zd mergeable %d offset %zd, size %zd, "
|
855 | e7b43f7e | Stefan Hajnoczi | "guest hdr len %zd, host hdr len %zd",
|
856 | e7b43f7e | Stefan Hajnoczi | i, n->mergeable_rx_bufs,
|
857 | e35e23f6 | Michael S. Tsirkin | offset, size, n->guest_hdr_len, n->host_hdr_len);
|
858 | 279a4253 | Michael S. Tsirkin | #endif
|
859 | 279a4253 | Michael S. Tsirkin | return size;
|
860 | 279a4253 | Michael S. Tsirkin | } |
861 | fbe78f4f | aliguori | |
862 | fbe78f4f | aliguori | /* signal other side */
|
863 | 0c87e93e | Jason Wang | virtqueue_fill(q->rx_vq, &elem, total, i++); |
864 | fbe78f4f | aliguori | } |
865 | fbe78f4f | aliguori | |
866 | 63c58728 | Michael S. Tsirkin | if (mhdr_cnt) {
|
867 | 63c58728 | Michael S. Tsirkin | stw_p(&mhdr.num_buffers, i); |
868 | 63c58728 | Michael S. Tsirkin | iov_from_buf(mhdr_sg, mhdr_cnt, |
869 | 63c58728 | Michael S. Tsirkin | 0,
|
870 | 63c58728 | Michael S. Tsirkin | &mhdr.num_buffers, sizeof mhdr.num_buffers);
|
871 | 44b15bc5 | Aurelien Jarno | } |
872 | fbe78f4f | aliguori | |
873 | 0c87e93e | Jason Wang | virtqueue_flush(q->rx_vq, i); |
874 | 0c87e93e | Jason Wang | virtio_notify(&n->vdev, q->rx_vq); |
875 | 4f1c942b | Mark McLoughlin | |
876 | 4f1c942b | Mark McLoughlin | return size;
|
877 | fbe78f4f | aliguori | } |
878 | fbe78f4f | aliguori | |
879 | 0c87e93e | Jason Wang | static int32_t virtio_net_flush_tx(VirtIONetQueue *q);
|
880 | 6243375f | Mark McLoughlin | |
881 | 4e68f7a0 | Stefan Hajnoczi | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
882 | 6243375f | Mark McLoughlin | { |
883 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
884 | fed699f9 | Jason Wang | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
885 | 6243375f | Mark McLoughlin | |
886 | 0c87e93e | Jason Wang | virtqueue_push(q->tx_vq, &q->async_tx.elem, 0);
|
887 | 0c87e93e | Jason Wang | virtio_notify(&n->vdev, q->tx_vq); |
888 | 6243375f | Mark McLoughlin | |
889 | 0c87e93e | Jason Wang | q->async_tx.elem.out_num = q->async_tx.len = 0;
|
890 | 6243375f | Mark McLoughlin | |
891 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 1);
|
892 | 0c87e93e | Jason Wang | virtio_net_flush_tx(q); |
893 | 6243375f | Mark McLoughlin | } |
894 | 6243375f | Mark McLoughlin | |
895 | fbe78f4f | aliguori | /* TX */
|
896 | 0c87e93e | Jason Wang | static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
|
897 | fbe78f4f | aliguori | { |
898 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
899 | fbe78f4f | aliguori | VirtQueueElement elem; |
900 | e3f30488 | Alex Williamson | int32_t num_packets = 0;
|
901 | fed699f9 | Jason Wang | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
|
902 | e3f30488 | Alex Williamson | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
903 | e3f30488 | Alex Williamson | return num_packets;
|
904 | e3f30488 | Alex Williamson | } |
905 | fbe78f4f | aliguori | |
906 | 85cf2a8d | Michael S. Tsirkin | assert(n->vdev.vm_running); |
907 | 783e7706 | Michael S. Tsirkin | |
908 | 0c87e93e | Jason Wang | if (q->async_tx.elem.out_num) {
|
909 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 0);
|
910 | e3f30488 | Alex Williamson | return num_packets;
|
911 | 6243375f | Mark McLoughlin | } |
912 | 6243375f | Mark McLoughlin | |
913 | 0c87e93e | Jason Wang | while (virtqueue_pop(q->tx_vq, &elem)) {
|
914 | 14761f9c | Michael S. Tsirkin | ssize_t ret, len; |
915 | fbe78f4f | aliguori | unsigned int out_num = elem.out_num; |
916 | fbe78f4f | aliguori | struct iovec *out_sg = &elem.out_sg[0]; |
917 | 14761f9c | Michael S. Tsirkin | struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
918 | fbe78f4f | aliguori | |
919 | 7b80d08e | Michael S. Tsirkin | if (out_num < 1) { |
920 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net header not in first element");
|
921 | fbe78f4f | aliguori | exit(1);
|
922 | fbe78f4f | aliguori | } |
923 | fbe78f4f | aliguori | |
924 | 14761f9c | Michael S. Tsirkin | /*
|
925 | 14761f9c | Michael S. Tsirkin | * If host wants to see the guest header as is, we can
|
926 | 14761f9c | Michael S. Tsirkin | * pass it on unchanged. Otherwise, copy just the parts
|
927 | 14761f9c | Michael S. Tsirkin | * that host is interested in.
|
928 | 14761f9c | Michael S. Tsirkin | */
|
929 | 14761f9c | Michael S. Tsirkin | assert(n->host_hdr_len <= n->guest_hdr_len); |
930 | 14761f9c | Michael S. Tsirkin | if (n->host_hdr_len != n->guest_hdr_len) {
|
931 | 14761f9c | Michael S. Tsirkin | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg),
|
932 | 14761f9c | Michael S. Tsirkin | out_sg, out_num, |
933 | 14761f9c | Michael S. Tsirkin | 0, n->host_hdr_len);
|
934 | 14761f9c | Michael S. Tsirkin | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, |
935 | 14761f9c | Michael S. Tsirkin | out_sg, out_num, |
936 | 14761f9c | Michael S. Tsirkin | n->guest_hdr_len, -1);
|
937 | 14761f9c | Michael S. Tsirkin | out_num = sg_num; |
938 | 14761f9c | Michael S. Tsirkin | out_sg = sg; |
939 | fbe78f4f | aliguori | } |
940 | fbe78f4f | aliguori | |
941 | 7b80d08e | Michael S. Tsirkin | len = n->guest_hdr_len; |
942 | 14761f9c | Michael S. Tsirkin | |
943 | fed699f9 | Jason Wang | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
944 | fed699f9 | Jason Wang | out_sg, out_num, virtio_net_tx_complete); |
945 | 6243375f | Mark McLoughlin | if (ret == 0) { |
946 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 0);
|
947 | 0c87e93e | Jason Wang | q->async_tx.elem = elem; |
948 | 0c87e93e | Jason Wang | q->async_tx.len = len; |
949 | e3f30488 | Alex Williamson | return -EBUSY;
|
950 | 6243375f | Mark McLoughlin | } |
951 | 6243375f | Mark McLoughlin | |
952 | 6243375f | Mark McLoughlin | len += ret; |
953 | fbe78f4f | aliguori | |
954 | 0c87e93e | Jason Wang | virtqueue_push(q->tx_vq, &elem, 0);
|
955 | 0c87e93e | Jason Wang | virtio_notify(&n->vdev, q->tx_vq); |
956 | e3f30488 | Alex Williamson | |
957 | e3f30488 | Alex Williamson | if (++num_packets >= n->tx_burst) {
|
958 | e3f30488 | Alex Williamson | break;
|
959 | e3f30488 | Alex Williamson | } |
960 | fbe78f4f | aliguori | } |
961 | e3f30488 | Alex Williamson | return num_packets;
|
962 | fbe78f4f | aliguori | } |
963 | fbe78f4f | aliguori | |
964 | a697a334 | Alex Williamson | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
965 | fbe78f4f | aliguori | { |
966 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
967 | fed699f9 | Jason Wang | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
968 | fbe78f4f | aliguori | |
969 | 783e7706 | Michael S. Tsirkin | /* This happens when device was stopped but VCPU wasn't. */
|
970 | 85cf2a8d | Michael S. Tsirkin | if (!n->vdev.vm_running) {
|
971 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
972 | 783e7706 | Michael S. Tsirkin | return;
|
973 | 783e7706 | Michael S. Tsirkin | } |
974 | 783e7706 | Michael S. Tsirkin | |
975 | 0c87e93e | Jason Wang | if (q->tx_waiting) {
|
976 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 1);
|
977 | 0c87e93e | Jason Wang | qemu_del_timer(q->tx_timer); |
978 | 0c87e93e | Jason Wang | q->tx_waiting = 0;
|
979 | 0c87e93e | Jason Wang | virtio_net_flush_tx(q); |
980 | fbe78f4f | aliguori | } else {
|
981 | 0c87e93e | Jason Wang | qemu_mod_timer(q->tx_timer, |
982 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
983 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
984 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 0);
|
985 | fbe78f4f | aliguori | } |
986 | fbe78f4f | aliguori | } |
987 | fbe78f4f | aliguori | |
988 | a697a334 | Alex Williamson | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
989 | a697a334 | Alex Williamson | { |
990 | a697a334 | Alex Williamson | VirtIONet *n = to_virtio_net(vdev); |
991 | fed699f9 | Jason Wang | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
992 | a697a334 | Alex Williamson | |
993 | 0c87e93e | Jason Wang | if (unlikely(q->tx_waiting)) {
|
994 | a697a334 | Alex Williamson | return;
|
995 | a697a334 | Alex Williamson | } |
996 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
997 | 783e7706 | Michael S. Tsirkin | /* This happens when device was stopped but VCPU wasn't. */
|
998 | 85cf2a8d | Michael S. Tsirkin | if (!n->vdev.vm_running) {
|
999 | 783e7706 | Michael S. Tsirkin | return;
|
1000 | 783e7706 | Michael S. Tsirkin | } |
1001 | a697a334 | Alex Williamson | virtio_queue_set_notification(vq, 0);
|
1002 | 0c87e93e | Jason Wang | qemu_bh_schedule(q->tx_bh); |
1003 | a697a334 | Alex Williamson | } |
1004 | a697a334 | Alex Williamson | |
1005 | fbe78f4f | aliguori | static void virtio_net_tx_timer(void *opaque) |
1006 | fbe78f4f | aliguori | { |
1007 | 0c87e93e | Jason Wang | VirtIONetQueue *q = opaque; |
1008 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
1009 | 85cf2a8d | Michael S. Tsirkin | assert(n->vdev.vm_running); |
1010 | fbe78f4f | aliguori | |
1011 | 0c87e93e | Jason Wang | q->tx_waiting = 0;
|
1012 | fbe78f4f | aliguori | |
1013 | fbe78f4f | aliguori | /* Just in case the driver is not ready on more */
|
1014 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
1015 | fbe78f4f | aliguori | return;
|
1016 | fbe78f4f | aliguori | |
1017 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 1);
|
1018 | 0c87e93e | Jason Wang | virtio_net_flush_tx(q); |
1019 | fbe78f4f | aliguori | } |
1020 | fbe78f4f | aliguori | |
1021 | a697a334 | Alex Williamson | static void virtio_net_tx_bh(void *opaque) |
1022 | a697a334 | Alex Williamson | { |
1023 | 0c87e93e | Jason Wang | VirtIONetQueue *q = opaque; |
1024 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
1025 | a697a334 | Alex Williamson | int32_t ret; |
1026 | a697a334 | Alex Williamson | |
1027 | 85cf2a8d | Michael S. Tsirkin | assert(n->vdev.vm_running); |
1028 | 783e7706 | Michael S. Tsirkin | |
1029 | 0c87e93e | Jason Wang | q->tx_waiting = 0;
|
1030 | a697a334 | Alex Williamson | |
1031 | a697a334 | Alex Williamson | /* Just in case the driver is not ready on more */
|
1032 | a697a334 | Alex Williamson | if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)))
|
1033 | a697a334 | Alex Williamson | return;
|
1034 | a697a334 | Alex Williamson | |
1035 | 0c87e93e | Jason Wang | ret = virtio_net_flush_tx(q); |
1036 | a697a334 | Alex Williamson | if (ret == -EBUSY) {
|
1037 | a697a334 | Alex Williamson | return; /* Notification re-enable handled by tx_complete */ |
1038 | a697a334 | Alex Williamson | } |
1039 | a697a334 | Alex Williamson | |
1040 | a697a334 | Alex Williamson | /* If we flush a full burst of packets, assume there are
|
1041 | a697a334 | Alex Williamson | * more coming and immediately reschedule */
|
1042 | a697a334 | Alex Williamson | if (ret >= n->tx_burst) {
|
1043 | 0c87e93e | Jason Wang | qemu_bh_schedule(q->tx_bh); |
1044 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
1045 | a697a334 | Alex Williamson | return;
|
1046 | a697a334 | Alex Williamson | } |
1047 | a697a334 | Alex Williamson | |
1048 | a697a334 | Alex Williamson | /* If less than a full burst, re-enable notification and flush
|
1049 | a697a334 | Alex Williamson | * anything that may have come in while we weren't looking. If
|
1050 | a697a334 | Alex Williamson | * we find something, assume the guest is still active and reschedule */
|
1051 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 1);
|
1052 | 0c87e93e | Jason Wang | if (virtio_net_flush_tx(q) > 0) { |
1053 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 0);
|
1054 | 0c87e93e | Jason Wang | qemu_bh_schedule(q->tx_bh); |
1055 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
1056 | a697a334 | Alex Williamson | } |
1057 | a697a334 | Alex Williamson | } |
1058 | a697a334 | Alex Williamson | |
1059 | fed699f9 | Jason Wang | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl) |
1060 | fed699f9 | Jason Wang | { |
1061 | fed699f9 | Jason Wang | VirtIODevice *vdev = &n->vdev; |
1062 | fed699f9 | Jason Wang | int i, max = multiqueue ? n->max_queues : 1; |
1063 | fed699f9 | Jason Wang | |
1064 | fed699f9 | Jason Wang | n->multiqueue = multiqueue; |
1065 | fed699f9 | Jason Wang | |
1066 | fed699f9 | Jason Wang | for (i = 2; i <= n->max_queues * 2 + 1; i++) { |
1067 | fed699f9 | Jason Wang | virtio_del_queue(vdev, i); |
1068 | fed699f9 | Jason Wang | } |
1069 | fed699f9 | Jason Wang | |
1070 | fed699f9 | Jason Wang | for (i = 1; i < max; i++) { |
1071 | fed699f9 | Jason Wang | n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx);
|
1072 | fed699f9 | Jason Wang | if (n->vqs[i].tx_timer) {
|
1073 | fed699f9 | Jason Wang | n->vqs[i].tx_vq = |
1074 | fed699f9 | Jason Wang | virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer);
|
1075 | fed699f9 | Jason Wang | n->vqs[i].tx_timer = qemu_new_timer_ns(vm_clock, |
1076 | fed699f9 | Jason Wang | virtio_net_tx_timer, |
1077 | fed699f9 | Jason Wang | &n->vqs[i]); |
1078 | fed699f9 | Jason Wang | } else {
|
1079 | fed699f9 | Jason Wang | n->vqs[i].tx_vq = |
1080 | fed699f9 | Jason Wang | virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh);
|
1081 | fed699f9 | Jason Wang | n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); |
1082 | fed699f9 | Jason Wang | } |
1083 | fed699f9 | Jason Wang | |
1084 | fed699f9 | Jason Wang | n->vqs[i].tx_waiting = 0;
|
1085 | fed699f9 | Jason Wang | n->vqs[i].n = n; |
1086 | fed699f9 | Jason Wang | } |
1087 | fed699f9 | Jason Wang | |
1088 | fed699f9 | Jason Wang | if (ctrl) {
|
1089 | fed699f9 | Jason Wang | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
|
1090 | fed699f9 | Jason Wang | } |
1091 | fed699f9 | Jason Wang | |
1092 | fed699f9 | Jason Wang | virtio_net_set_queues(n); |
1093 | fed699f9 | Jason Wang | } |
1094 | fed699f9 | Jason Wang | |
1095 | fbe78f4f | aliguori | static void virtio_net_save(QEMUFile *f, void *opaque) |
1096 | fbe78f4f | aliguori | { |
1097 | 5f800801 | Jason Wang | int i;
|
1098 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
1099 | fbe78f4f | aliguori | |
1100 | afbaa7b4 | Michael S. Tsirkin | /* At this point, backend must be stopped, otherwise
|
1101 | afbaa7b4 | Michael S. Tsirkin | * it might keep writing to memory. */
|
1102 | afbaa7b4 | Michael S. Tsirkin | assert(!n->vhost_started); |
1103 | fbe78f4f | aliguori | virtio_save(&n->vdev, f); |
1104 | fbe78f4f | aliguori | |
1105 | 79674068 | aliguori | qemu_put_buffer(f, n->mac, ETH_ALEN); |
1106 | 5f800801 | Jason Wang | qemu_put_be32(f, n->vqs[0].tx_waiting);
|
1107 | e46cb38f | aliguori | qemu_put_be32(f, n->mergeable_rx_bufs); |
1108 | 9d6271b8 | aliguori | qemu_put_be16(f, n->status); |
1109 | f10c592e | Alex Williamson | qemu_put_byte(f, n->promisc); |
1110 | f10c592e | Alex Williamson | qemu_put_byte(f, n->allmulti); |
1111 | b6503ed9 | aliguori | qemu_put_be32(f, n->mac_table.in_use); |
1112 | b6503ed9 | aliguori | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
1113 | f21c0ed9 | aliguori | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
1114 | 3a330134 | Mark McLoughlin | qemu_put_be32(f, n->has_vnet_hdr); |
1115 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.multi_overflow); |
1116 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.uni_overflow); |
1117 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->alluni); |
1118 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nomulti); |
1119 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nouni); |
1120 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nobcast); |
1121 | 0ce0e8f4 | Mark McLoughlin | qemu_put_byte(f, n->has_ufo); |
1122 | 5f800801 | Jason Wang | if (n->max_queues > 1) { |
1123 | 5f800801 | Jason Wang | qemu_put_be16(f, n->max_queues); |
1124 | 5f800801 | Jason Wang | qemu_put_be16(f, n->curr_queues); |
1125 | 5f800801 | Jason Wang | for (i = 1; i < n->curr_queues; i++) { |
1126 | 5f800801 | Jason Wang | qemu_put_be32(f, n->vqs[i].tx_waiting); |
1127 | 5f800801 | Jason Wang | } |
1128 | 5f800801 | Jason Wang | } |
1129 | fbe78f4f | aliguori | } |
1130 | fbe78f4f | aliguori | |
1131 | fbe78f4f | aliguori | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
1132 | fbe78f4f | aliguori | { |
1133 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
1134 | 5f800801 | Jason Wang | int ret, i, link_down;
|
1135 | fbe78f4f | aliguori | |
1136 | 9d6271b8 | aliguori | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
1137 | fbe78f4f | aliguori | return -EINVAL;
|
1138 | fbe78f4f | aliguori | |
1139 | 2a633c46 | Orit Wassermann | ret = virtio_load(&n->vdev, f); |
1140 | 2a633c46 | Orit Wassermann | if (ret) {
|
1141 | 2a633c46 | Orit Wassermann | return ret;
|
1142 | 2a633c46 | Orit Wassermann | } |
1143 | fbe78f4f | aliguori | |
1144 | 79674068 | aliguori | qemu_get_buffer(f, n->mac, ETH_ALEN); |
1145 | 5f800801 | Jason Wang | n->vqs[0].tx_waiting = qemu_get_be32(f);
|
1146 | ff3a8066 | Michael S. Tsirkin | |
1147 | ff3a8066 | Michael S. Tsirkin | virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f)); |
1148 | fbe78f4f | aliguori | |
1149 | 9d6271b8 | aliguori | if (version_id >= 3) |
1150 | 9d6271b8 | aliguori | n->status = qemu_get_be16(f); |
1151 | 9d6271b8 | aliguori | |
1152 | 002437cd | aliguori | if (version_id >= 4) { |
1153 | f10c592e | Alex Williamson | if (version_id < 8) { |
1154 | f10c592e | Alex Williamson | n->promisc = qemu_get_be32(f); |
1155 | f10c592e | Alex Williamson | n->allmulti = qemu_get_be32(f); |
1156 | f10c592e | Alex Williamson | } else {
|
1157 | f10c592e | Alex Williamson | n->promisc = qemu_get_byte(f); |
1158 | f10c592e | Alex Williamson | n->allmulti = qemu_get_byte(f); |
1159 | f10c592e | Alex Williamson | } |
1160 | 002437cd | aliguori | } |
1161 | 002437cd | aliguori | |
1162 | b6503ed9 | aliguori | if (version_id >= 5) { |
1163 | b6503ed9 | aliguori | n->mac_table.in_use = qemu_get_be32(f); |
1164 | b6503ed9 | aliguori | /* MAC_TABLE_ENTRIES may be different from the saved image */
|
1165 | b6503ed9 | aliguori | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
1166 | b6503ed9 | aliguori | qemu_get_buffer(f, n->mac_table.macs, |
1167 | b6503ed9 | aliguori | n->mac_table.in_use * ETH_ALEN); |
1168 | b6503ed9 | aliguori | } else if (n->mac_table.in_use) { |
1169 | e398d61b | Juan Quintela | uint8_t *buf = g_malloc0(n->mac_table.in_use); |
1170 | e398d61b | Juan Quintela | qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN); |
1171 | e398d61b | Juan Quintela | g_free(buf); |
1172 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
1173 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
1174 | b6503ed9 | aliguori | } |
1175 | b6503ed9 | aliguori | } |
1176 | b6503ed9 | aliguori | |
1177 | f21c0ed9 | aliguori | if (version_id >= 6) |
1178 | f21c0ed9 | aliguori | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
1179 | f21c0ed9 | aliguori | |
1180 | 3a330134 | Mark McLoughlin | if (version_id >= 7) { |
1181 | 3a330134 | Mark McLoughlin | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
1182 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires vnet_hdr=on");
|
1183 | 3a330134 | Mark McLoughlin | return -1; |
1184 | 3a330134 | Mark McLoughlin | } |
1185 | 3a330134 | Mark McLoughlin | |
1186 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
1187 | b356f76d | Jason Wang | tap_set_offload(qemu_get_queue(n->nic)->peer, |
1188 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
1189 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
1190 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
1191 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
1192 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
1193 | 3a330134 | Mark McLoughlin | } |
1194 | 6c042c16 | Alex Williamson | } |
1195 | 6c042c16 | Alex Williamson | |
1196 | 8fd2a2f1 | Alex Williamson | if (version_id >= 9) { |
1197 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = qemu_get_byte(f); |
1198 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = qemu_get_byte(f); |
1199 | 8fd2a2f1 | Alex Williamson | } |
1200 | 8fd2a2f1 | Alex Williamson | |
1201 | 015cb166 | Alex Williamson | if (version_id >= 10) { |
1202 | 015cb166 | Alex Williamson | n->alluni = qemu_get_byte(f); |
1203 | 015cb166 | Alex Williamson | n->nomulti = qemu_get_byte(f); |
1204 | 015cb166 | Alex Williamson | n->nouni = qemu_get_byte(f); |
1205 | 015cb166 | Alex Williamson | n->nobcast = qemu_get_byte(f); |
1206 | 015cb166 | Alex Williamson | } |
1207 | 015cb166 | Alex Williamson | |
1208 | 0ce0e8f4 | Mark McLoughlin | if (version_id >= 11) { |
1209 | 0ce0e8f4 | Mark McLoughlin | if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
1210 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires TUN_F_UFO support");
|
1211 | 0ce0e8f4 | Mark McLoughlin | return -1; |
1212 | 0ce0e8f4 | Mark McLoughlin | } |
1213 | 0ce0e8f4 | Mark McLoughlin | } |
1214 | 0ce0e8f4 | Mark McLoughlin | |
1215 | 5f800801 | Jason Wang | if (n->max_queues > 1) { |
1216 | 5f800801 | Jason Wang | if (n->max_queues != qemu_get_be16(f)) {
|
1217 | 5f800801 | Jason Wang | error_report("virtio-net: different max_queues ");
|
1218 | 5f800801 | Jason Wang | return -1; |
1219 | 5f800801 | Jason Wang | } |
1220 | 5f800801 | Jason Wang | |
1221 | 5f800801 | Jason Wang | n->curr_queues = qemu_get_be16(f); |
1222 | 5f800801 | Jason Wang | for (i = 1; i < n->curr_queues; i++) { |
1223 | 5f800801 | Jason Wang | n->vqs[i].tx_waiting = qemu_get_be32(f); |
1224 | 5f800801 | Jason Wang | } |
1225 | 5f800801 | Jason Wang | } |
1226 | 5f800801 | Jason Wang | |
1227 | 5f800801 | Jason Wang | virtio_net_set_queues(n); |
1228 | 5f800801 | Jason Wang | |
1229 | 2d9aba39 | Alex Williamson | /* Find the first multicast entry in the saved MAC filter */
|
1230 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.in_use; i++) { |
1231 | 2d9aba39 | Alex Williamson | if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
1232 | 2d9aba39 | Alex Williamson | break;
|
1233 | 2d9aba39 | Alex Williamson | } |
1234 | 2d9aba39 | Alex Williamson | } |
1235 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = i; |
1236 | 98991481 | Amos Kong | |
1237 | 98991481 | Amos Kong | /* nc.link_down can't be migrated, so infer link_down according
|
1238 | 98991481 | Amos Kong | * to link status bit in n->status */
|
1239 | 5f800801 | Jason Wang | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0;
|
1240 | 5f800801 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
1241 | 5f800801 | Jason Wang | qemu_get_subqueue(n->nic, i)->link_down = link_down; |
1242 | 5f800801 | Jason Wang | } |
1243 | 98991481 | Amos Kong | |
1244 | fbe78f4f | aliguori | return 0; |
1245 | fbe78f4f | aliguori | } |
1246 | fbe78f4f | aliguori | |
1247 | 4e68f7a0 | Stefan Hajnoczi | static void virtio_net_cleanup(NetClientState *nc) |
1248 | b946a153 | aliguori | { |
1249 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
1250 | b946a153 | aliguori | |
1251 | eb6b6c12 | Mark McLoughlin | n->nic = NULL;
|
1252 | b946a153 | aliguori | } |
1253 | b946a153 | aliguori | |
1254 | eb6b6c12 | Mark McLoughlin | static NetClientInfo net_virtio_info = {
|
1255 | 2be64a68 | Laszlo Ersek | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
1256 | eb6b6c12 | Mark McLoughlin | .size = sizeof(NICState),
|
1257 | eb6b6c12 | Mark McLoughlin | .can_receive = virtio_net_can_receive, |
1258 | eb6b6c12 | Mark McLoughlin | .receive = virtio_net_receive, |
1259 | eb6b6c12 | Mark McLoughlin | .cleanup = virtio_net_cleanup, |
1260 | eb6b6c12 | Mark McLoughlin | .link_status_changed = virtio_net_set_link_status, |
1261 | eb6b6c12 | Mark McLoughlin | }; |
1262 | eb6b6c12 | Mark McLoughlin | |
1263 | f56a1247 | Michael S. Tsirkin | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
1264 | f56a1247 | Michael S. Tsirkin | { |
1265 | f56a1247 | Michael S. Tsirkin | VirtIONet *n = to_virtio_net(vdev); |
1266 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
1267 | f56a1247 | Michael S. Tsirkin | assert(n->vhost_started); |
1268 | b356f76d | Jason Wang | return vhost_net_virtqueue_pending(tap_get_vhost_net(nc->peer), idx);
|
1269 | f56a1247 | Michael S. Tsirkin | } |
1270 | f56a1247 | Michael S. Tsirkin | |
1271 | f56a1247 | Michael S. Tsirkin | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, |
1272 | f56a1247 | Michael S. Tsirkin | bool mask)
|
1273 | f56a1247 | Michael S. Tsirkin | { |
1274 | f56a1247 | Michael S. Tsirkin | VirtIONet *n = to_virtio_net(vdev); |
1275 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
1276 | f56a1247 | Michael S. Tsirkin | assert(n->vhost_started); |
1277 | b356f76d | Jason Wang | vhost_net_virtqueue_mask(tap_get_vhost_net(nc->peer), |
1278 | f56a1247 | Michael S. Tsirkin | vdev, idx, mask); |
1279 | f56a1247 | Michael S. Tsirkin | } |
1280 | f56a1247 | Michael S. Tsirkin | |
1281 | f0c07c7c | Alex Williamson | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
1282 | 1e89ad5b | Anthony Liguori | virtio_net_conf *net, |
1283 | 1e89ad5b | Anthony Liguori | uint32_t host_features) |
1284 | fbe78f4f | aliguori | { |
1285 | fbe78f4f | aliguori | VirtIONet *n; |
1286 | fed699f9 | Jason Wang | int i;
|
1287 | fbe78f4f | aliguori | |
1288 | 53c25cea | Paul Brook | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
|
1289 | 53c25cea | Paul Brook | sizeof(struct virtio_net_config), |
1290 | 53c25cea | Paul Brook | sizeof(VirtIONet));
|
1291 | fbe78f4f | aliguori | |
1292 | 0f03eca6 | aliguori | n->vdev.get_config = virtio_net_get_config; |
1293 | 0f03eca6 | aliguori | n->vdev.set_config = virtio_net_set_config; |
1294 | fbe78f4f | aliguori | n->vdev.get_features = virtio_net_get_features; |
1295 | fbe78f4f | aliguori | n->vdev.set_features = virtio_net_set_features; |
1296 | 8eca6b1b | aliguori | n->vdev.bad_features = virtio_net_bad_features; |
1297 | 002437cd | aliguori | n->vdev.reset = virtio_net_reset; |
1298 | 9bc6304c | Michael S. Tsirkin | n->vdev.set_status = virtio_net_set_status; |
1299 | f56a1247 | Michael S. Tsirkin | n->vdev.guest_notifier_mask = virtio_net_guest_notifier_mask; |
1300 | f56a1247 | Michael S. Tsirkin | n->vdev.guest_notifier_pending = virtio_net_guest_notifier_pending; |
1301 | fed699f9 | Jason Wang | n->vqs[0].rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx); |
1302 | fed699f9 | Jason Wang | n->max_queues = conf->queues; |
1303 | fed699f9 | Jason Wang | n->curr_queues = 1;
|
1304 | fed699f9 | Jason Wang | n->vqs[0].n = n;
|
1305 | fed699f9 | Jason Wang | n->tx_timeout = net->txtimer; |
1306 | a697a334 | Alex Williamson | |
1307 | a697a334 | Alex Williamson | if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { |
1308 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net: "
|
1309 | e7b43f7e | Stefan Hajnoczi | "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
|
1310 | e7b43f7e | Stefan Hajnoczi | net->tx); |
1311 | e7b43f7e | Stefan Hajnoczi | error_report("Defaulting to \"bh\"");
|
1312 | a697a334 | Alex Williamson | } |
1313 | a697a334 | Alex Williamson | |
1314 | a697a334 | Alex Williamson | if (net->tx && !strcmp(net->tx, "timer")) { |
1315 | fed699f9 | Jason Wang | n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, |
1316 | fed699f9 | Jason Wang | virtio_net_handle_tx_timer); |
1317 | fed699f9 | Jason Wang | n->vqs[0].tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer,
|
1318 | fed699f9 | Jason Wang | &n->vqs[0]);
|
1319 | a697a334 | Alex Williamson | } else {
|
1320 | fed699f9 | Jason Wang | n->vqs[0].tx_vq = virtio_add_queue(&n->vdev, 256, |
1321 | fed699f9 | Jason Wang | virtio_net_handle_tx_bh); |
1322 | fed699f9 | Jason Wang | n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); |
1323 | a697a334 | Alex Williamson | } |
1324 | 4ffb17f5 | Alex Williamson | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
|
1325 | 97b15621 | Gerd Hoffmann | qemu_macaddr_default_if_unset(&conf->macaddr); |
1326 | 3cbe04c4 | Mark McLoughlin | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
1327 | 554c97dd | aliguori | n->status = VIRTIO_NET_S_LINK_UP; |
1328 | fbe78f4f | aliguori | |
1329 | f79f2bfc | Anthony Liguori | n->nic = qemu_new_nic(&net_virtio_info, conf, object_get_typename(OBJECT(dev)), dev->id, n); |
1330 | 6e371ab8 | Michael S. Tsirkin | peer_test_vnet_hdr(n); |
1331 | 6e371ab8 | Michael S. Tsirkin | if (peer_has_vnet_hdr(n)) {
|
1332 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
1333 | fed699f9 | Jason Wang | tap_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true);
|
1334 | fed699f9 | Jason Wang | } |
1335 | 6e371ab8 | Michael S. Tsirkin | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
1336 | 6e371ab8 | Michael S. Tsirkin | } else {
|
1337 | 6e371ab8 | Michael S. Tsirkin | n->host_hdr_len = 0;
|
1338 | 6e371ab8 | Michael S. Tsirkin | } |
1339 | eb6b6c12 | Mark McLoughlin | |
1340 | b356f76d | Jason Wang | qemu_format_nic_info_str(qemu_get_queue(n->nic), conf->macaddr.a); |
1341 | 96d5e201 | aliguori | |
1342 | fed699f9 | Jason Wang | n->vqs[0].tx_waiting = 0; |
1343 | e3f30488 | Alex Williamson | n->tx_burst = net->txburst; |
1344 | ff3a8066 | Michael S. Tsirkin | virtio_net_set_mrg_rx_bufs(n, 0);
|
1345 | 002437cd | aliguori | n->promisc = 1; /* for compatibility */ |
1346 | fbe78f4f | aliguori | |
1347 | 7267c094 | Anthony Liguori | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
1348 | b6503ed9 | aliguori | |
1349 | 7267c094 | Anthony Liguori | n->vlans = g_malloc0(MAX_VLAN >> 3);
|
1350 | f21c0ed9 | aliguori | |
1351 | 01657c86 | Alex Williamson | n->qdev = dev; |
1352 | 01657c86 | Alex Williamson | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, |
1353 | fbe78f4f | aliguori | virtio_net_save, virtio_net_load, n); |
1354 | cf21e106 | Paul Brook | |
1355 | 1ca4d09a | Gleb Natapov | add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0");
|
1356 | 1ca4d09a | Gleb Natapov | |
1357 | 53c25cea | Paul Brook | return &n->vdev;
|
1358 | cf21e106 | Paul Brook | } |
1359 | 97b15621 | Gerd Hoffmann | |
1360 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev)
|
1361 | 97b15621 | Gerd Hoffmann | { |
1362 | 97b15621 | Gerd Hoffmann | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); |
1363 | fed699f9 | Jason Wang | int i;
|
1364 | 9bc6304c | Michael S. Tsirkin | |
1365 | afbaa7b4 | Michael S. Tsirkin | /* This will stop vhost backend if appropriate. */
|
1366 | afbaa7b4 | Michael S. Tsirkin | virtio_net_set_status(vdev, 0);
|
1367 | 97b15621 | Gerd Hoffmann | |
1368 | 01657c86 | Alex Williamson | unregister_savevm(n->qdev, "virtio-net", n);
|
1369 | 97b15621 | Gerd Hoffmann | |
1370 | 7267c094 | Anthony Liguori | g_free(n->mac_table.macs); |
1371 | 7267c094 | Anthony Liguori | g_free(n->vlans); |
1372 | 97b15621 | Gerd Hoffmann | |
1373 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
1374 | fed699f9 | Jason Wang | VirtIONetQueue *q = &n->vqs[i]; |
1375 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, i); |
1376 | fed699f9 | Jason Wang | |
1377 | fed699f9 | Jason Wang | qemu_purge_queued_packets(nc); |
1378 | fed699f9 | Jason Wang | |
1379 | fed699f9 | Jason Wang | if (q->tx_timer) {
|
1380 | fed699f9 | Jason Wang | qemu_del_timer(q->tx_timer); |
1381 | fed699f9 | Jason Wang | qemu_free_timer(q->tx_timer); |
1382 | fed699f9 | Jason Wang | } else {
|
1383 | fed699f9 | Jason Wang | qemu_bh_delete(q->tx_bh); |
1384 | fed699f9 | Jason Wang | } |
1385 | a697a334 | Alex Williamson | } |
1386 | 97b15621 | Gerd Hoffmann | |
1387 | 948ecf21 | Jason Wang | qemu_del_nic(n->nic); |
1388 | b52dfd71 | Amit Shah | virtio_cleanup(&n->vdev); |
1389 | 97b15621 | Gerd Hoffmann | } |