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1 | fbe78f4f | aliguori | /*
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2 | fbe78f4f | aliguori | * Virtio Network Device
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3 | fbe78f4f | aliguori | *
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4 | fbe78f4f | aliguori | * Copyright IBM, Corp. 2007
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5 | fbe78f4f | aliguori | *
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6 | fbe78f4f | aliguori | * Authors:
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7 | fbe78f4f | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | fbe78f4f | aliguori | *
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9 | fbe78f4f | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | fbe78f4f | aliguori | * the COPYING file in the top-level directory.
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11 | fbe78f4f | aliguori | *
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12 | fbe78f4f | aliguori | */
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13 | fbe78f4f | aliguori | |
14 | e4d5639d | Amit Shah | #include "iov.h" |
15 | fbe78f4f | aliguori | #include "virtio.h" |
16 | fbe78f4f | aliguori | #include "net.h" |
17 | 7200ac3c | Mark McLoughlin | #include "net/checksum.h" |
18 | a8ed73f7 | Mark McLoughlin | #include "net/tap.h" |
19 | 2f792016 | Markus Armbruster | #include "qemu-error.h" |
20 | fbe78f4f | aliguori | #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 | fbe78f4f | aliguori | typedef struct VirtIONet |
30 | fbe78f4f | aliguori | { |
31 | fbe78f4f | aliguori | VirtIODevice vdev; |
32 | 79674068 | aliguori | uint8_t mac[ETH_ALEN]; |
33 | 554c97dd | aliguori | uint16_t status; |
34 | fbe78f4f | aliguori | VirtQueue *rx_vq; |
35 | fbe78f4f | aliguori | VirtQueue *tx_vq; |
36 | 3d11d36c | aliguori | VirtQueue *ctrl_vq; |
37 | eb6b6c12 | Mark McLoughlin | NICState *nic; |
38 | fbe78f4f | aliguori | QEMUTimer *tx_timer; |
39 | a697a334 | Alex Williamson | QEMUBH *tx_bh; |
40 | f0c07c7c | Alex Williamson | uint32_t tx_timeout; |
41 | e3f30488 | Alex Williamson | int32_t tx_burst; |
42 | 4b4b8d36 | Alex Williamson | int tx_waiting;
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43 | 3a330134 | Mark McLoughlin | uint32_t has_vnet_hdr; |
44 | 0ce0e8f4 | Mark McLoughlin | uint8_t has_ufo; |
45 | 6243375f | Mark McLoughlin | struct {
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46 | 6243375f | Mark McLoughlin | VirtQueueElement elem; |
47 | 6243375f | Mark McLoughlin | ssize_t len; |
48 | 6243375f | Mark McLoughlin | } async_tx; |
49 | fbe78f4f | aliguori | int mergeable_rx_bufs;
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50 | f10c592e | Alex Williamson | uint8_t promisc; |
51 | f10c592e | Alex Williamson | uint8_t allmulti; |
52 | 015cb166 | Alex Williamson | uint8_t alluni; |
53 | 015cb166 | Alex Williamson | uint8_t nomulti; |
54 | 015cb166 | Alex Williamson | uint8_t nouni; |
55 | 015cb166 | Alex Williamson | uint8_t nobcast; |
56 | 9bc6304c | Michael S. Tsirkin | uint8_t vhost_started; |
57 | b6503ed9 | aliguori | struct {
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58 | b6503ed9 | aliguori | int in_use;
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59 | 2d9aba39 | Alex Williamson | int first_multi;
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60 | 8fd2a2f1 | Alex Williamson | uint8_t multi_overflow; |
61 | 8fd2a2f1 | Alex Williamson | uint8_t uni_overflow; |
62 | b6503ed9 | aliguori | uint8_t *macs; |
63 | b6503ed9 | aliguori | } mac_table; |
64 | f21c0ed9 | aliguori | uint32_t *vlans; |
65 | 01657c86 | Alex Williamson | DeviceState *qdev; |
66 | fbe78f4f | aliguori | } VirtIONet; |
67 | fbe78f4f | aliguori | |
68 | fbe78f4f | aliguori | /* TODO
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69 | fbe78f4f | aliguori | * - we could suppress RX interrupt if we were so inclined.
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70 | fbe78f4f | aliguori | */
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71 | fbe78f4f | aliguori | |
72 | fbe78f4f | aliguori | static VirtIONet *to_virtio_net(VirtIODevice *vdev)
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73 | fbe78f4f | aliguori | { |
74 | fbe78f4f | aliguori | return (VirtIONet *)vdev;
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75 | fbe78f4f | aliguori | } |
76 | fbe78f4f | aliguori | |
77 | 0f03eca6 | aliguori | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
78 | fbe78f4f | aliguori | { |
79 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
80 | fbe78f4f | aliguori | struct virtio_net_config netcfg;
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81 | fbe78f4f | aliguori | |
82 | b46d97f2 | Stefan Hajnoczi | stw_p(&netcfg.status, n->status); |
83 | 79674068 | aliguori | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
84 | fbe78f4f | aliguori | memcpy(config, &netcfg, sizeof(netcfg));
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85 | fbe78f4f | aliguori | } |
86 | fbe78f4f | aliguori | |
87 | 0f03eca6 | aliguori | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
88 | 0f03eca6 | aliguori | { |
89 | 0f03eca6 | aliguori | VirtIONet *n = to_virtio_net(vdev); |
90 | 0f03eca6 | aliguori | struct virtio_net_config netcfg;
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91 | 0f03eca6 | aliguori | |
92 | 0f03eca6 | aliguori | memcpy(&netcfg, config, sizeof(netcfg));
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93 | 0f03eca6 | aliguori | |
94 | 79674068 | aliguori | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
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95 | 79674068 | aliguori | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
96 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
97 | 0f03eca6 | aliguori | } |
98 | 0f03eca6 | aliguori | } |
99 | 0f03eca6 | aliguori | |
100 | 783e7706 | Michael S. Tsirkin | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
101 | 783e7706 | Michael S. Tsirkin | { |
102 | 783e7706 | Michael S. Tsirkin | return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
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103 | 85cf2a8d | Michael S. Tsirkin | (n->status & VIRTIO_NET_S_LINK_UP) && n->vdev.vm_running; |
104 | 783e7706 | Michael S. Tsirkin | } |
105 | 783e7706 | Michael S. Tsirkin | |
106 | 783e7706 | Michael S. Tsirkin | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
107 | afbaa7b4 | Michael S. Tsirkin | { |
108 | afbaa7b4 | Michael S. Tsirkin | if (!n->nic->nc.peer) {
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109 | afbaa7b4 | Michael S. Tsirkin | return;
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110 | afbaa7b4 | Michael S. Tsirkin | } |
111 | afbaa7b4 | Michael S. Tsirkin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) {
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112 | afbaa7b4 | Michael S. Tsirkin | return;
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113 | afbaa7b4 | Michael S. Tsirkin | } |
114 | afbaa7b4 | Michael S. Tsirkin | |
115 | afbaa7b4 | Michael S. Tsirkin | if (!tap_get_vhost_net(n->nic->nc.peer)) {
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116 | afbaa7b4 | Michael S. Tsirkin | return;
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117 | afbaa7b4 | Michael S. Tsirkin | } |
118 | 32993698 | Michael S. Tsirkin | if (!!n->vhost_started == virtio_net_started(n, status) &&
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119 | 32993698 | Michael S. Tsirkin | !n->nic->nc.peer->link_down) { |
120 | afbaa7b4 | Michael S. Tsirkin | return;
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121 | afbaa7b4 | Michael S. Tsirkin | } |
122 | afbaa7b4 | Michael S. Tsirkin | if (!n->vhost_started) {
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123 | 5430a28f | mst@redhat.com | int r;
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124 | 5430a28f | mst@redhat.com | if (!vhost_net_query(tap_get_vhost_net(n->nic->nc.peer), &n->vdev)) {
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125 | 5430a28f | mst@redhat.com | return;
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126 | 5430a28f | mst@redhat.com | } |
127 | 5430a28f | mst@redhat.com | r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); |
128 | afbaa7b4 | Michael S. Tsirkin | if (r < 0) { |
129 | e7b43f7e | Stefan Hajnoczi | error_report("unable to start vhost net: %d: "
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130 | e7b43f7e | Stefan Hajnoczi | "falling back on userspace virtio", -r);
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131 | afbaa7b4 | Michael S. Tsirkin | } else {
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132 | afbaa7b4 | Michael S. Tsirkin | n->vhost_started = 1;
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133 | afbaa7b4 | Michael S. Tsirkin | } |
134 | afbaa7b4 | Michael S. Tsirkin | } else {
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135 | afbaa7b4 | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); |
136 | afbaa7b4 | Michael S. Tsirkin | n->vhost_started = 0;
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137 | afbaa7b4 | Michael S. Tsirkin | } |
138 | afbaa7b4 | Michael S. Tsirkin | } |
139 | afbaa7b4 | Michael S. Tsirkin | |
140 | 783e7706 | Michael S. Tsirkin | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
141 | 783e7706 | Michael S. Tsirkin | { |
142 | 783e7706 | Michael S. Tsirkin | VirtIONet *n = to_virtio_net(vdev); |
143 | 783e7706 | Michael S. Tsirkin | |
144 | 783e7706 | Michael S. Tsirkin | virtio_net_vhost_status(n, status); |
145 | 783e7706 | Michael S. Tsirkin | |
146 | 783e7706 | Michael S. Tsirkin | if (!n->tx_waiting) {
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147 | 783e7706 | Michael S. Tsirkin | return;
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148 | 783e7706 | Michael S. Tsirkin | } |
149 | 783e7706 | Michael S. Tsirkin | |
150 | 783e7706 | Michael S. Tsirkin | if (virtio_net_started(n, status) && !n->vhost_started) {
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151 | 783e7706 | Michael S. Tsirkin | if (n->tx_timer) {
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152 | 783e7706 | Michael S. Tsirkin | qemu_mod_timer(n->tx_timer, |
153 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
154 | 783e7706 | Michael S. Tsirkin | } else {
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155 | 783e7706 | Michael S. Tsirkin | qemu_bh_schedule(n->tx_bh); |
156 | 783e7706 | Michael S. Tsirkin | } |
157 | 783e7706 | Michael S. Tsirkin | } else {
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158 | 783e7706 | Michael S. Tsirkin | if (n->tx_timer) {
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159 | 783e7706 | Michael S. Tsirkin | qemu_del_timer(n->tx_timer); |
160 | 783e7706 | Michael S. Tsirkin | } else {
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161 | 783e7706 | Michael S. Tsirkin | qemu_bh_cancel(n->tx_bh); |
162 | 783e7706 | Michael S. Tsirkin | } |
163 | 783e7706 | Michael S. Tsirkin | } |
164 | 783e7706 | Michael S. Tsirkin | } |
165 | 783e7706 | Michael S. Tsirkin | |
166 | eb6b6c12 | Mark McLoughlin | static void virtio_net_set_link_status(VLANClientState *nc) |
167 | 554c97dd | aliguori | { |
168 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
169 | 554c97dd | aliguori | uint16_t old_status = n->status; |
170 | 554c97dd | aliguori | |
171 | eb6b6c12 | Mark McLoughlin | if (nc->link_down)
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172 | 554c97dd | aliguori | n->status &= ~VIRTIO_NET_S_LINK_UP; |
173 | 554c97dd | aliguori | else
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174 | 554c97dd | aliguori | n->status |= VIRTIO_NET_S_LINK_UP; |
175 | 554c97dd | aliguori | |
176 | 554c97dd | aliguori | if (n->status != old_status)
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177 | 554c97dd | aliguori | virtio_notify_config(&n->vdev); |
178 | afbaa7b4 | Michael S. Tsirkin | |
179 | afbaa7b4 | Michael S. Tsirkin | virtio_net_set_status(&n->vdev, n->vdev.status); |
180 | 554c97dd | aliguori | } |
181 | 554c97dd | aliguori | |
182 | 002437cd | aliguori | static void virtio_net_reset(VirtIODevice *vdev) |
183 | 002437cd | aliguori | { |
184 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
185 | 002437cd | aliguori | |
186 | 002437cd | aliguori | /* Reset back to compatibility mode */
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187 | 002437cd | aliguori | n->promisc = 1;
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188 | 002437cd | aliguori | n->allmulti = 0;
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189 | 015cb166 | Alex Williamson | n->alluni = 0;
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190 | 015cb166 | Alex Williamson | n->nomulti = 0;
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191 | 015cb166 | Alex Williamson | n->nouni = 0;
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192 | 015cb166 | Alex Williamson | n->nobcast = 0;
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193 | b6503ed9 | aliguori | |
194 | f21c0ed9 | aliguori | /* Flush any MAC and VLAN filter table state */
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195 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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196 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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197 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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198 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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199 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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200 | f21c0ed9 | aliguori | memset(n->vlans, 0, MAX_VLAN >> 3); |
201 | 002437cd | aliguori | } |
202 | 002437cd | aliguori | |
203 | 3a330134 | Mark McLoughlin | static int peer_has_vnet_hdr(VirtIONet *n) |
204 | 3a330134 | Mark McLoughlin | { |
205 | eb6b6c12 | Mark McLoughlin | if (!n->nic->nc.peer)
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206 | 3a330134 | Mark McLoughlin | return 0; |
207 | 3a330134 | Mark McLoughlin | |
208 | 665a3b07 | Mark McLoughlin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP)
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209 | 3a330134 | Mark McLoughlin | return 0; |
210 | 3a330134 | Mark McLoughlin | |
211 | eb6b6c12 | Mark McLoughlin | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
212 | 3a330134 | Mark McLoughlin | |
213 | 3a330134 | Mark McLoughlin | return n->has_vnet_hdr;
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214 | 3a330134 | Mark McLoughlin | } |
215 | 3a330134 | Mark McLoughlin | |
216 | 0ce0e8f4 | Mark McLoughlin | static int peer_has_ufo(VirtIONet *n) |
217 | 0ce0e8f4 | Mark McLoughlin | { |
218 | 0ce0e8f4 | Mark McLoughlin | if (!peer_has_vnet_hdr(n))
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219 | 0ce0e8f4 | Mark McLoughlin | return 0; |
220 | 0ce0e8f4 | Mark McLoughlin | |
221 | eb6b6c12 | Mark McLoughlin | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
222 | 0ce0e8f4 | Mark McLoughlin | |
223 | 0ce0e8f4 | Mark McLoughlin | return n->has_ufo;
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224 | 0ce0e8f4 | Mark McLoughlin | } |
225 | 0ce0e8f4 | Mark McLoughlin | |
226 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
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227 | fbe78f4f | aliguori | { |
228 | 3a330134 | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
229 | fbe78f4f | aliguori | |
230 | c9f79a3f | Michael S. Tsirkin | features |= (1 << VIRTIO_NET_F_MAC);
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231 | c9f79a3f | Michael S. Tsirkin | |
232 | 3a330134 | Mark McLoughlin | if (peer_has_vnet_hdr(n)) {
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233 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
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234 | 8172539d | Michael S. Tsirkin | } else {
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235 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_CSUM);
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236 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
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237 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
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238 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
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239 | 8172539d | Michael S. Tsirkin | |
240 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
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241 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
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242 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
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243 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
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244 | 8172539d | Michael S. Tsirkin | } |
245 | 3a330134 | Mark McLoughlin | |
246 | 8172539d | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
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247 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
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248 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
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249 | 3a330134 | Mark McLoughlin | } |
250 | 3a330134 | Mark McLoughlin | |
251 | 9bc6304c | Michael S. Tsirkin | if (!n->nic->nc.peer ||
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252 | 9bc6304c | Michael S. Tsirkin | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
253 | 9bc6304c | Michael S. Tsirkin | return features;
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254 | 9bc6304c | Michael S. Tsirkin | } |
255 | 9bc6304c | Michael S. Tsirkin | if (!tap_get_vhost_net(n->nic->nc.peer)) {
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256 | 9bc6304c | Michael S. Tsirkin | return features;
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257 | 9bc6304c | Michael S. Tsirkin | } |
258 | 9bc6304c | Michael S. Tsirkin | return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features);
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259 | fbe78f4f | aliguori | } |
260 | fbe78f4f | aliguori | |
261 | 8eca6b1b | aliguori | static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
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262 | 8eca6b1b | aliguori | { |
263 | 8eca6b1b | aliguori | uint32_t features = 0;
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264 | 8eca6b1b | aliguori | |
265 | 8eca6b1b | aliguori | /* Linux kernel 2.6.25. It understood MAC (as everyone must),
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266 | 8eca6b1b | aliguori | * but also these: */
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267 | 8eca6b1b | aliguori | features |= (1 << VIRTIO_NET_F_MAC);
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268 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_CSUM);
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269 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO4);
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270 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO6);
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271 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_ECN);
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272 | 8eca6b1b | aliguori | |
273 | 8172539d | Michael S. Tsirkin | return features;
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274 | 8eca6b1b | aliguori | } |
275 | 8eca6b1b | aliguori | |
276 | fbe78f4f | aliguori | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
277 | fbe78f4f | aliguori | { |
278 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
279 | fbe78f4f | aliguori | |
280 | fbe78f4f | aliguori | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
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281 | f5436dd9 | Mark McLoughlin | |
282 | f5436dd9 | Mark McLoughlin | if (n->has_vnet_hdr) {
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283 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
284 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
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285 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
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286 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
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287 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_ECN) & 1,
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288 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_UFO) & 1);
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289 | f5436dd9 | Mark McLoughlin | } |
290 | dc14a397 | David L Stevens | if (!n->nic->nc.peer ||
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291 | dc14a397 | David L Stevens | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
292 | dc14a397 | David L Stevens | return;
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293 | dc14a397 | David L Stevens | } |
294 | dc14a397 | David L Stevens | if (!tap_get_vhost_net(n->nic->nc.peer)) {
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295 | dc14a397 | David L Stevens | return;
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296 | dc14a397 | David L Stevens | } |
297 | 57c3229b | Michael S. Tsirkin | vhost_net_ack_features(tap_get_vhost_net(n->nic->nc.peer), features); |
298 | fbe78f4f | aliguori | } |
299 | fbe78f4f | aliguori | |
300 | 002437cd | aliguori | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
301 | 002437cd | aliguori | VirtQueueElement *elem) |
302 | 002437cd | aliguori | { |
303 | 002437cd | aliguori | uint8_t on; |
304 | 002437cd | aliguori | |
305 | 002437cd | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { |
306 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net ctrl invalid rx mode command");
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307 | 002437cd | aliguori | exit(1);
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308 | 002437cd | aliguori | } |
309 | 002437cd | aliguori | |
310 | 002437cd | aliguori | on = ldub_p(elem->out_sg[1].iov_base);
|
311 | 002437cd | aliguori | |
312 | 002437cd | aliguori | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
|
313 | 002437cd | aliguori | n->promisc = on; |
314 | 002437cd | aliguori | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) |
315 | 002437cd | aliguori | n->allmulti = on; |
316 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
317 | 015cb166 | Alex Williamson | n->alluni = on; |
318 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) |
319 | 015cb166 | Alex Williamson | n->nomulti = on; |
320 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) |
321 | 015cb166 | Alex Williamson | n->nouni = on; |
322 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) |
323 | 015cb166 | Alex Williamson | n->nobcast = on; |
324 | 002437cd | aliguori | else
|
325 | 002437cd | aliguori | return VIRTIO_NET_ERR;
|
326 | 002437cd | aliguori | |
327 | 002437cd | aliguori | return VIRTIO_NET_OK;
|
328 | 002437cd | aliguori | } |
329 | 002437cd | aliguori | |
330 | b6503ed9 | aliguori | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
331 | b6503ed9 | aliguori | VirtQueueElement *elem) |
332 | b6503ed9 | aliguori | { |
333 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac mac_data;
|
334 | b6503ed9 | aliguori | |
335 | b6503ed9 | aliguori | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || |
336 | b6503ed9 | aliguori | elem->out_sg[1].iov_len < sizeof(mac_data) || |
337 | b6503ed9 | aliguori | elem->out_sg[2].iov_len < sizeof(mac_data)) |
338 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
339 | b6503ed9 | aliguori | |
340 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
341 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
|
342 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
|
343 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
|
344 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
345 | b6503ed9 | aliguori | |
346 | 44b15bc5 | Aurelien Jarno | mac_data.entries = ldl_p(elem->out_sg[1].iov_base);
|
347 | b6503ed9 | aliguori | |
348 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
349 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
|
350 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
351 | b6503ed9 | aliguori | |
352 | b6503ed9 | aliguori | if (mac_data.entries <= MAC_TABLE_ENTRIES) {
|
353 | b6503ed9 | aliguori | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), |
354 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
355 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
356 | b6503ed9 | aliguori | } else {
|
357 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 1;
|
358 | b6503ed9 | aliguori | } |
359 | b6503ed9 | aliguori | |
360 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = n->mac_table.in_use; |
361 | 2d9aba39 | Alex Williamson | |
362 | 44b15bc5 | Aurelien Jarno | mac_data.entries = ldl_p(elem->out_sg[2].iov_base);
|
363 | b6503ed9 | aliguori | |
364 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
365 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
|
366 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
367 | b6503ed9 | aliguori | |
368 | b6503ed9 | aliguori | if (mac_data.entries) {
|
369 | b6503ed9 | aliguori | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
|
370 | b6503ed9 | aliguori | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), |
371 | b6503ed9 | aliguori | elem->out_sg[2].iov_base + sizeof(mac_data), |
372 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
373 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
374 | 8fd2a2f1 | Alex Williamson | } else {
|
375 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 1;
|
376 | 8fd2a2f1 | Alex Williamson | } |
377 | b6503ed9 | aliguori | } |
378 | b6503ed9 | aliguori | |
379 | b6503ed9 | aliguori | return VIRTIO_NET_OK;
|
380 | b6503ed9 | aliguori | } |
381 | b6503ed9 | aliguori | |
382 | f21c0ed9 | aliguori | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
383 | f21c0ed9 | aliguori | VirtQueueElement *elem) |
384 | f21c0ed9 | aliguori | { |
385 | f21c0ed9 | aliguori | uint16_t vid; |
386 | f21c0ed9 | aliguori | |
387 | f21c0ed9 | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { |
388 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net ctrl invalid vlan command");
|
389 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
390 | f21c0ed9 | aliguori | } |
391 | f21c0ed9 | aliguori | |
392 | 44b15bc5 | Aurelien Jarno | vid = lduw_p(elem->out_sg[1].iov_base);
|
393 | f21c0ed9 | aliguori | |
394 | f21c0ed9 | aliguori | if (vid >= MAX_VLAN)
|
395 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
396 | f21c0ed9 | aliguori | |
397 | f21c0ed9 | aliguori | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
398 | f21c0ed9 | aliguori | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
399 | f21c0ed9 | aliguori | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
400 | f21c0ed9 | aliguori | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
401 | f21c0ed9 | aliguori | else
|
402 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
403 | f21c0ed9 | aliguori | |
404 | f21c0ed9 | aliguori | return VIRTIO_NET_OK;
|
405 | f21c0ed9 | aliguori | } |
406 | f21c0ed9 | aliguori | |
407 | 3d11d36c | aliguori | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
408 | 3d11d36c | aliguori | { |
409 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
410 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr ctrl;
|
411 | 3d11d36c | aliguori | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
412 | 3d11d36c | aliguori | VirtQueueElement elem; |
413 | 3d11d36c | aliguori | |
414 | 3d11d36c | aliguori | while (virtqueue_pop(vq, &elem)) {
|
415 | 3d11d36c | aliguori | if ((elem.in_num < 1) || (elem.out_num < 1)) { |
416 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net ctrl missing headers");
|
417 | 3d11d36c | aliguori | exit(1);
|
418 | 3d11d36c | aliguori | } |
419 | 3d11d36c | aliguori | |
420 | 3d11d36c | aliguori | if (elem.out_sg[0].iov_len < sizeof(ctrl) || |
421 | c6bb9a32 | aliguori | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
422 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net ctrl header not in correct element");
|
423 | 3d11d36c | aliguori | exit(1);
|
424 | 3d11d36c | aliguori | } |
425 | 3d11d36c | aliguori | |
426 | 3d11d36c | aliguori | ctrl.class = ldub_p(elem.out_sg[0].iov_base);
|
427 | 3d11d36c | aliguori | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); |
428 | 3d11d36c | aliguori | |
429 | 002437cd | aliguori | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
|
430 | 002437cd | aliguori | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); |
431 | b6503ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
432 | b6503ed9 | aliguori | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); |
433 | f21c0ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
434 | f21c0ed9 | aliguori | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); |
435 | 002437cd | aliguori | |
436 | 3d11d36c | aliguori | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
|
437 | 3d11d36c | aliguori | |
438 | 3d11d36c | aliguori | virtqueue_push(vq, &elem, sizeof(status));
|
439 | 3d11d36c | aliguori | virtio_notify(vdev, vq); |
440 | 3d11d36c | aliguori | } |
441 | 3d11d36c | aliguori | } |
442 | 3d11d36c | aliguori | |
443 | fbe78f4f | aliguori | /* RX */
|
444 | fbe78f4f | aliguori | |
445 | fbe78f4f | aliguori | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
446 | fbe78f4f | aliguori | { |
447 | 8aeff62d | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
448 | 8aeff62d | Mark McLoughlin | |
449 | eb6b6c12 | Mark McLoughlin | qemu_flush_queued_packets(&n->nic->nc); |
450 | a61d1f67 | Glauber Costa | |
451 | a61d1f67 | Glauber Costa | /* We now have RX buffers, signal to the IO thread to break out of the
|
452 | a61d1f67 | Glauber Costa | * select to re-poll the tap file descriptor */
|
453 | a61d1f67 | Glauber Costa | qemu_notify_event(); |
454 | fbe78f4f | aliguori | } |
455 | fbe78f4f | aliguori | |
456 | eb6b6c12 | Mark McLoughlin | static int virtio_net_can_receive(VLANClientState *nc) |
457 | fbe78f4f | aliguori | { |
458 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
459 | 85cf2a8d | Michael S. Tsirkin | if (!n->vdev.vm_running) {
|
460 | 95477323 | Michael S. Tsirkin | return 0; |
461 | 95477323 | Michael S. Tsirkin | } |
462 | cdd5cc12 | Mark McLoughlin | |
463 | fbe78f4f | aliguori | if (!virtio_queue_ready(n->rx_vq) ||
|
464 | fbe78f4f | aliguori | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
465 | fbe78f4f | aliguori | return 0; |
466 | fbe78f4f | aliguori | |
467 | cdd5cc12 | Mark McLoughlin | return 1; |
468 | cdd5cc12 | Mark McLoughlin | } |
469 | cdd5cc12 | Mark McLoughlin | |
470 | cdd5cc12 | Mark McLoughlin | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) |
471 | cdd5cc12 | Mark McLoughlin | { |
472 | fbe78f4f | aliguori | if (virtio_queue_empty(n->rx_vq) ||
|
473 | fbe78f4f | aliguori | (n->mergeable_rx_bufs && |
474 | fbe78f4f | aliguori | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
|
475 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 1);
|
476 | 06b12970 | Tom Lendacky | |
477 | 06b12970 | Tom Lendacky | /* To avoid a race condition where the guest has made some buffers
|
478 | 06b12970 | Tom Lendacky | * available after the above check but before notification was
|
479 | 06b12970 | Tom Lendacky | * enabled, check for available buffers again.
|
480 | 06b12970 | Tom Lendacky | */
|
481 | 06b12970 | Tom Lendacky | if (virtio_queue_empty(n->rx_vq) ||
|
482 | 06b12970 | Tom Lendacky | (n->mergeable_rx_bufs && |
483 | 06b12970 | Tom Lendacky | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0)))
|
484 | 06b12970 | Tom Lendacky | return 0; |
485 | fbe78f4f | aliguori | } |
486 | fbe78f4f | aliguori | |
487 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 0);
|
488 | fbe78f4f | aliguori | return 1; |
489 | fbe78f4f | aliguori | } |
490 | fbe78f4f | aliguori | |
491 | 1d41b0c1 | Anthony Liguori | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
492 | 1d41b0c1 | Anthony Liguori | * it never finds out that the packets don't have valid checksums. This
|
493 | 1d41b0c1 | Anthony Liguori | * causes dhclient to get upset. Fedora's carried a patch for ages to
|
494 | 1d41b0c1 | Anthony Liguori | * fix this with Xen but it hasn't appeared in an upstream release of
|
495 | 1d41b0c1 | Anthony Liguori | * dhclient yet.
|
496 | 1d41b0c1 | Anthony Liguori | *
|
497 | 1d41b0c1 | Anthony Liguori | * To avoid breaking existing guests, we catch udp packets and add
|
498 | 1d41b0c1 | Anthony Liguori | * checksums. This is terrible but it's better than hacking the guest
|
499 | 1d41b0c1 | Anthony Liguori | * kernels.
|
500 | 1d41b0c1 | Anthony Liguori | *
|
501 | 1d41b0c1 | Anthony Liguori | * N.B. if we introduce a zero-copy API, this operation is no longer free so
|
502 | 1d41b0c1 | Anthony Liguori | * we should provide a mechanism to disable it to avoid polluting the host
|
503 | 1d41b0c1 | Anthony Liguori | * cache.
|
504 | 1d41b0c1 | Anthony Liguori | */
|
505 | 1d41b0c1 | Anthony Liguori | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
506 | 1d41b0c1 | Anthony Liguori | const uint8_t *buf, size_t size)
|
507 | 1d41b0c1 | Anthony Liguori | { |
508 | 1d41b0c1 | Anthony Liguori | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
509 | 1d41b0c1 | Anthony Liguori | (size > 27 && size < 1500) && /* normal sized MTU */ |
510 | 1d41b0c1 | Anthony Liguori | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
511 | 1d41b0c1 | Anthony Liguori | (buf[23] == 17) && /* ip.protocol == UDP */ |
512 | 1d41b0c1 | Anthony Liguori | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
513 | 1d41b0c1 | Anthony Liguori | /* FIXME this cast is evil */
|
514 | 1d41b0c1 | Anthony Liguori | net_checksum_calculate((uint8_t *)buf, size); |
515 | 1d41b0c1 | Anthony Liguori | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
516 | 1d41b0c1 | Anthony Liguori | } |
517 | 1d41b0c1 | Anthony Liguori | } |
518 | 1d41b0c1 | Anthony Liguori | |
519 | fbe78f4f | aliguori | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
520 | 4689f4b3 | aliguori | const void *buf, size_t size, size_t hdr_len) |
521 | fbe78f4f | aliguori | { |
522 | 3f4cb3d3 | blueswir1 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
523 | fbe78f4f | aliguori | int offset = 0; |
524 | fbe78f4f | aliguori | |
525 | fbe78f4f | aliguori | hdr->flags = 0;
|
526 | fbe78f4f | aliguori | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
527 | fbe78f4f | aliguori | |
528 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
529 | 3a330134 | Mark McLoughlin | memcpy(hdr, buf, sizeof(*hdr));
|
530 | 3a330134 | Mark McLoughlin | offset = sizeof(*hdr);
|
531 | 1d41b0c1 | Anthony Liguori | work_around_broken_dhclient(hdr, buf + offset, size - offset); |
532 | 3a330134 | Mark McLoughlin | } |
533 | 3a330134 | Mark McLoughlin | |
534 | fbe78f4f | aliguori | /* We only ever receive a struct virtio_net_hdr from the tapfd,
|
535 | fbe78f4f | aliguori | * but we may be passing along a larger header to the guest.
|
536 | fbe78f4f | aliguori | */
|
537 | fbe78f4f | aliguori | iov[0].iov_base += hdr_len;
|
538 | fbe78f4f | aliguori | iov[0].iov_len -= hdr_len;
|
539 | fbe78f4f | aliguori | |
540 | fbe78f4f | aliguori | return offset;
|
541 | fbe78f4f | aliguori | } |
542 | fbe78f4f | aliguori | |
543 | 3831ab20 | aliguori | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
544 | 3831ab20 | aliguori | { |
545 | 3831ab20 | aliguori | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
546 | f21c0ed9 | aliguori | static const uint8_t vlan[] = {0x81, 0x00}; |
547 | 3831ab20 | aliguori | uint8_t *ptr = (uint8_t *)buf; |
548 | b6503ed9 | aliguori | int i;
|
549 | 3831ab20 | aliguori | |
550 | 3831ab20 | aliguori | if (n->promisc)
|
551 | 3831ab20 | aliguori | return 1; |
552 | 3831ab20 | aliguori | |
553 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
554 | 3a330134 | Mark McLoughlin | ptr += sizeof(struct virtio_net_hdr); |
555 | 3a330134 | Mark McLoughlin | } |
556 | 3a330134 | Mark McLoughlin | |
557 | f21c0ed9 | aliguori | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
558 | f21c0ed9 | aliguori | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
559 | f21c0ed9 | aliguori | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
560 | f21c0ed9 | aliguori | return 0; |
561 | f21c0ed9 | aliguori | } |
562 | f21c0ed9 | aliguori | |
563 | bbe2f399 | Alex Williamson | if (ptr[0] & 1) { // multicast |
564 | bbe2f399 | Alex Williamson | if (!memcmp(ptr, bcast, sizeof(bcast))) { |
565 | 015cb166 | Alex Williamson | return !n->nobcast;
|
566 | 015cb166 | Alex Williamson | } else if (n->nomulti) { |
567 | 015cb166 | Alex Williamson | return 0; |
568 | 8fd2a2f1 | Alex Williamson | } else if (n->allmulti || n->mac_table.multi_overflow) { |
569 | bbe2f399 | Alex Williamson | return 1; |
570 | bbe2f399 | Alex Williamson | } |
571 | 2d9aba39 | Alex Williamson | |
572 | 2d9aba39 | Alex Williamson | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
573 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
574 | 2d9aba39 | Alex Williamson | return 1; |
575 | 2d9aba39 | Alex Williamson | } |
576 | 2d9aba39 | Alex Williamson | } |
577 | bbe2f399 | Alex Williamson | } else { // unicast |
578 | 015cb166 | Alex Williamson | if (n->nouni) {
|
579 | 015cb166 | Alex Williamson | return 0; |
580 | 015cb166 | Alex Williamson | } else if (n->alluni || n->mac_table.uni_overflow) { |
581 | 8fd2a2f1 | Alex Williamson | return 1; |
582 | 8fd2a2f1 | Alex Williamson | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
583 | bbe2f399 | Alex Williamson | return 1; |
584 | bbe2f399 | Alex Williamson | } |
585 | 3831ab20 | aliguori | |
586 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.first_multi; i++) { |
587 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
588 | 2d9aba39 | Alex Williamson | return 1; |
589 | 2d9aba39 | Alex Williamson | } |
590 | 2d9aba39 | Alex Williamson | } |
591 | b6503ed9 | aliguori | } |
592 | b6503ed9 | aliguori | |
593 | 3831ab20 | aliguori | return 0; |
594 | 3831ab20 | aliguori | } |
595 | 3831ab20 | aliguori | |
596 | eb6b6c12 | Mark McLoughlin | static ssize_t virtio_net_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
597 | fbe78f4f | aliguori | { |
598 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
599 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
600 | 279a4253 | Michael S. Tsirkin | size_t guest_hdr_len, offset, i, host_hdr_len; |
601 | fbe78f4f | aliguori | |
602 | eb6b6c12 | Mark McLoughlin | if (!virtio_net_can_receive(&n->nic->nc))
|
603 | cdd5cc12 | Mark McLoughlin | return -1; |
604 | cdd5cc12 | Mark McLoughlin | |
605 | 940cda94 | Michael S. Tsirkin | /* hdr_len refers to the header we supply to the guest */
|
606 | 279a4253 | Michael S. Tsirkin | guest_hdr_len = n->mergeable_rx_bufs ? |
607 | 940cda94 | Michael S. Tsirkin | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
608 | 940cda94 | Michael S. Tsirkin | |
609 | 940cda94 | Michael S. Tsirkin | |
610 | 279a4253 | Michael S. Tsirkin | host_hdr_len = n->has_vnet_hdr ? sizeof(struct virtio_net_hdr) : 0; |
611 | 279a4253 | Michael S. Tsirkin | if (!virtio_net_has_buffers(n, size + guest_hdr_len - host_hdr_len))
|
612 | 8aeff62d | Mark McLoughlin | return 0; |
613 | fbe78f4f | aliguori | |
614 | 3831ab20 | aliguori | if (!receive_filter(n, buf, size))
|
615 | 4f1c942b | Mark McLoughlin | return size;
|
616 | 3831ab20 | aliguori | |
617 | fbe78f4f | aliguori | offset = i = 0;
|
618 | fbe78f4f | aliguori | |
619 | fbe78f4f | aliguori | while (offset < size) {
|
620 | fbe78f4f | aliguori | VirtQueueElement elem; |
621 | fbe78f4f | aliguori | int len, total;
|
622 | fbe78f4f | aliguori | struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
623 | fbe78f4f | aliguori | |
624 | 22c253d9 | Amit Shah | total = 0;
|
625 | fbe78f4f | aliguori | |
626 | 279a4253 | Michael S. Tsirkin | if (virtqueue_pop(n->rx_vq, &elem) == 0) { |
627 | fbe78f4f | aliguori | if (i == 0) |
628 | 4f1c942b | Mark McLoughlin | return -1; |
629 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net unexpected empty queue: "
|
630 | 279a4253 | Michael S. Tsirkin | "i %zd mergeable %d offset %zd, size %zd, "
|
631 | e7b43f7e | Stefan Hajnoczi | "guest hdr len %zd, host hdr len %zd guest features 0x%x",
|
632 | 279a4253 | Michael S. Tsirkin | i, n->mergeable_rx_bufs, offset, size, |
633 | 279a4253 | Michael S. Tsirkin | guest_hdr_len, host_hdr_len, n->vdev.guest_features); |
634 | fbe78f4f | aliguori | exit(1);
|
635 | fbe78f4f | aliguori | } |
636 | fbe78f4f | aliguori | |
637 | fbe78f4f | aliguori | if (elem.in_num < 1) { |
638 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net receive queue contains no in buffers");
|
639 | fbe78f4f | aliguori | exit(1);
|
640 | fbe78f4f | aliguori | } |
641 | fbe78f4f | aliguori | |
642 | 279a4253 | Michael S. Tsirkin | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != guest_hdr_len) { |
643 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net header not in first element");
|
644 | fbe78f4f | aliguori | exit(1);
|
645 | fbe78f4f | aliguori | } |
646 | fbe78f4f | aliguori | |
647 | fbe78f4f | aliguori | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
648 | fbe78f4f | aliguori | |
649 | fbe78f4f | aliguori | if (i == 0) { |
650 | fbe78f4f | aliguori | if (n->mergeable_rx_bufs)
|
651 | fbe78f4f | aliguori | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
652 | fbe78f4f | aliguori | |
653 | fbe78f4f | aliguori | offset += receive_header(n, sg, elem.in_num, |
654 | 279a4253 | Michael S. Tsirkin | buf + offset, size - offset, guest_hdr_len); |
655 | 279a4253 | Michael S. Tsirkin | total += guest_hdr_len; |
656 | fbe78f4f | aliguori | } |
657 | fbe78f4f | aliguori | |
658 | fbe78f4f | aliguori | /* copy in packet. ugh */
|
659 | e4d5639d | Amit Shah | len = iov_from_buf(sg, elem.in_num, |
660 | e4d5639d | Amit Shah | buf + offset, size - offset); |
661 | fbe78f4f | aliguori | total += len; |
662 | 279a4253 | Michael S. Tsirkin | offset += len; |
663 | 279a4253 | Michael S. Tsirkin | /* If buffers can't be merged, at this point we
|
664 | 279a4253 | Michael S. Tsirkin | * must have consumed the complete packet.
|
665 | 279a4253 | Michael S. Tsirkin | * Otherwise, drop it. */
|
666 | 279a4253 | Michael S. Tsirkin | if (!n->mergeable_rx_bufs && offset < size) {
|
667 | 279a4253 | Michael S. Tsirkin | #if 0
|
668 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net truncated non-mergeable packet: "
|
669 | e7b43f7e | Stefan Hajnoczi | "i %zd mergeable %d offset %zd, size %zd, "
|
670 | e7b43f7e | Stefan Hajnoczi | "guest hdr len %zd, host hdr len %zd",
|
671 | e7b43f7e | Stefan Hajnoczi | i, n->mergeable_rx_bufs,
|
672 | e7b43f7e | Stefan Hajnoczi | offset, size, guest_hdr_len, host_hdr_len);
|
673 | 279a4253 | Michael S. Tsirkin | #endif
|
674 | 279a4253 | Michael S. Tsirkin | return size;
|
675 | 279a4253 | Michael S. Tsirkin | } |
676 | fbe78f4f | aliguori | |
677 | fbe78f4f | aliguori | /* signal other side */
|
678 | fbe78f4f | aliguori | virtqueue_fill(n->rx_vq, &elem, total, i++); |
679 | fbe78f4f | aliguori | } |
680 | fbe78f4f | aliguori | |
681 | 44b15bc5 | Aurelien Jarno | if (mhdr) {
|
682 | b46d97f2 | Stefan Hajnoczi | stw_p(&mhdr->num_buffers, i); |
683 | 44b15bc5 | Aurelien Jarno | } |
684 | fbe78f4f | aliguori | |
685 | fbe78f4f | aliguori | virtqueue_flush(n->rx_vq, i); |
686 | fbe78f4f | aliguori | virtio_notify(&n->vdev, n->rx_vq); |
687 | 4f1c942b | Mark McLoughlin | |
688 | 4f1c942b | Mark McLoughlin | return size;
|
689 | fbe78f4f | aliguori | } |
690 | fbe78f4f | aliguori | |
691 | e3f30488 | Alex Williamson | static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq);
|
692 | 6243375f | Mark McLoughlin | |
693 | eb6b6c12 | Mark McLoughlin | static void virtio_net_tx_complete(VLANClientState *nc, ssize_t len) |
694 | 6243375f | Mark McLoughlin | { |
695 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
696 | 6243375f | Mark McLoughlin | |
697 | 6243375f | Mark McLoughlin | virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); |
698 | 6243375f | Mark McLoughlin | virtio_notify(&n->vdev, n->tx_vq); |
699 | 6243375f | Mark McLoughlin | |
700 | 6243375f | Mark McLoughlin | n->async_tx.elem.out_num = n->async_tx.len = 0;
|
701 | 6243375f | Mark McLoughlin | |
702 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 1);
|
703 | 6243375f | Mark McLoughlin | virtio_net_flush_tx(n, n->tx_vq); |
704 | 6243375f | Mark McLoughlin | } |
705 | 6243375f | Mark McLoughlin | |
706 | fbe78f4f | aliguori | /* TX */
|
707 | e3f30488 | Alex Williamson | static int32_t virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq)
|
708 | fbe78f4f | aliguori | { |
709 | fbe78f4f | aliguori | VirtQueueElement elem; |
710 | e3f30488 | Alex Williamson | int32_t num_packets = 0;
|
711 | e3f30488 | Alex Williamson | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
712 | e3f30488 | Alex Williamson | return num_packets;
|
713 | e3f30488 | Alex Williamson | } |
714 | fbe78f4f | aliguori | |
715 | 85cf2a8d | Michael S. Tsirkin | assert(n->vdev.vm_running); |
716 | 783e7706 | Michael S. Tsirkin | |
717 | 6243375f | Mark McLoughlin | if (n->async_tx.elem.out_num) {
|
718 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
719 | e3f30488 | Alex Williamson | return num_packets;
|
720 | 6243375f | Mark McLoughlin | } |
721 | 6243375f | Mark McLoughlin | |
722 | fbe78f4f | aliguori | while (virtqueue_pop(vq, &elem)) {
|
723 | 6243375f | Mark McLoughlin | ssize_t ret, len = 0;
|
724 | fbe78f4f | aliguori | unsigned int out_num = elem.out_num; |
725 | fbe78f4f | aliguori | struct iovec *out_sg = &elem.out_sg[0]; |
726 | fbe78f4f | aliguori | unsigned hdr_len;
|
727 | fbe78f4f | aliguori | |
728 | fbe78f4f | aliguori | /* hdr_len refers to the header received from the guest */
|
729 | fbe78f4f | aliguori | hdr_len = n->mergeable_rx_bufs ? |
730 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
731 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr); |
732 | fbe78f4f | aliguori | |
733 | fbe78f4f | aliguori | if (out_num < 1 || out_sg->iov_len != hdr_len) { |
734 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net header not in first element");
|
735 | fbe78f4f | aliguori | exit(1);
|
736 | fbe78f4f | aliguori | } |
737 | fbe78f4f | aliguori | |
738 | fbe78f4f | aliguori | /* ignore the header if GSO is not supported */
|
739 | 3a330134 | Mark McLoughlin | if (!n->has_vnet_hdr) {
|
740 | fbe78f4f | aliguori | out_num--; |
741 | fbe78f4f | aliguori | out_sg++; |
742 | fbe78f4f | aliguori | len += hdr_len; |
743 | fbe78f4f | aliguori | } else if (n->mergeable_rx_bufs) { |
744 | fbe78f4f | aliguori | /* tapfd expects a struct virtio_net_hdr */
|
745 | fbe78f4f | aliguori | hdr_len -= sizeof(struct virtio_net_hdr); |
746 | fbe78f4f | aliguori | out_sg->iov_len -= hdr_len; |
747 | fbe78f4f | aliguori | len += hdr_len; |
748 | fbe78f4f | aliguori | } |
749 | fbe78f4f | aliguori | |
750 | eb6b6c12 | Mark McLoughlin | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
751 | 6243375f | Mark McLoughlin | virtio_net_tx_complete); |
752 | 6243375f | Mark McLoughlin | if (ret == 0) { |
753 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
754 | 6243375f | Mark McLoughlin | n->async_tx.elem = elem; |
755 | 6243375f | Mark McLoughlin | n->async_tx.len = len; |
756 | e3f30488 | Alex Williamson | return -EBUSY;
|
757 | 6243375f | Mark McLoughlin | } |
758 | 6243375f | Mark McLoughlin | |
759 | 6243375f | Mark McLoughlin | len += ret; |
760 | fbe78f4f | aliguori | |
761 | fbe78f4f | aliguori | virtqueue_push(vq, &elem, len); |
762 | fbe78f4f | aliguori | virtio_notify(&n->vdev, vq); |
763 | e3f30488 | Alex Williamson | |
764 | e3f30488 | Alex Williamson | if (++num_packets >= n->tx_burst) {
|
765 | e3f30488 | Alex Williamson | break;
|
766 | e3f30488 | Alex Williamson | } |
767 | fbe78f4f | aliguori | } |
768 | e3f30488 | Alex Williamson | return num_packets;
|
769 | fbe78f4f | aliguori | } |
770 | fbe78f4f | aliguori | |
771 | a697a334 | Alex Williamson | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
772 | fbe78f4f | aliguori | { |
773 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
774 | fbe78f4f | aliguori | |
775 | 783e7706 | Michael S. Tsirkin | /* This happens when device was stopped but VCPU wasn't. */
|
776 | 85cf2a8d | Michael S. Tsirkin | if (!n->vdev.vm_running) {
|
777 | 783e7706 | Michael S. Tsirkin | n->tx_waiting = 1;
|
778 | 783e7706 | Michael S. Tsirkin | return;
|
779 | 783e7706 | Michael S. Tsirkin | } |
780 | 783e7706 | Michael S. Tsirkin | |
781 | 4b4b8d36 | Alex Williamson | if (n->tx_waiting) {
|
782 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 1);
|
783 | fbe78f4f | aliguori | qemu_del_timer(n->tx_timer); |
784 | 4b4b8d36 | Alex Williamson | n->tx_waiting = 0;
|
785 | fbe78f4f | aliguori | virtio_net_flush_tx(n, vq); |
786 | fbe78f4f | aliguori | } else {
|
787 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
788 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
789 | 4b4b8d36 | Alex Williamson | n->tx_waiting = 1;
|
790 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 0);
|
791 | fbe78f4f | aliguori | } |
792 | fbe78f4f | aliguori | } |
793 | fbe78f4f | aliguori | |
794 | a697a334 | Alex Williamson | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
795 | a697a334 | Alex Williamson | { |
796 | a697a334 | Alex Williamson | VirtIONet *n = to_virtio_net(vdev); |
797 | a697a334 | Alex Williamson | |
798 | a697a334 | Alex Williamson | if (unlikely(n->tx_waiting)) {
|
799 | a697a334 | Alex Williamson | return;
|
800 | a697a334 | Alex Williamson | } |
801 | 783e7706 | Michael S. Tsirkin | n->tx_waiting = 1;
|
802 | 783e7706 | Michael S. Tsirkin | /* This happens when device was stopped but VCPU wasn't. */
|
803 | 85cf2a8d | Michael S. Tsirkin | if (!n->vdev.vm_running) {
|
804 | 783e7706 | Michael S. Tsirkin | return;
|
805 | 783e7706 | Michael S. Tsirkin | } |
806 | a697a334 | Alex Williamson | virtio_queue_set_notification(vq, 0);
|
807 | a697a334 | Alex Williamson | qemu_bh_schedule(n->tx_bh); |
808 | a697a334 | Alex Williamson | } |
809 | a697a334 | Alex Williamson | |
810 | fbe78f4f | aliguori | static void virtio_net_tx_timer(void *opaque) |
811 | fbe78f4f | aliguori | { |
812 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
813 | 85cf2a8d | Michael S. Tsirkin | assert(n->vdev.vm_running); |
814 | fbe78f4f | aliguori | |
815 | 4b4b8d36 | Alex Williamson | n->tx_waiting = 0;
|
816 | fbe78f4f | aliguori | |
817 | fbe78f4f | aliguori | /* Just in case the driver is not ready on more */
|
818 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
819 | fbe78f4f | aliguori | return;
|
820 | fbe78f4f | aliguori | |
821 | fbe78f4f | aliguori | virtio_queue_set_notification(n->tx_vq, 1);
|
822 | fbe78f4f | aliguori | virtio_net_flush_tx(n, n->tx_vq); |
823 | fbe78f4f | aliguori | } |
824 | fbe78f4f | aliguori | |
825 | a697a334 | Alex Williamson | static void virtio_net_tx_bh(void *opaque) |
826 | a697a334 | Alex Williamson | { |
827 | a697a334 | Alex Williamson | VirtIONet *n = opaque; |
828 | a697a334 | Alex Williamson | int32_t ret; |
829 | a697a334 | Alex Williamson | |
830 | 85cf2a8d | Michael S. Tsirkin | assert(n->vdev.vm_running); |
831 | 783e7706 | Michael S. Tsirkin | |
832 | a697a334 | Alex Williamson | n->tx_waiting = 0;
|
833 | a697a334 | Alex Williamson | |
834 | a697a334 | Alex Williamson | /* Just in case the driver is not ready on more */
|
835 | a697a334 | Alex Williamson | if (unlikely(!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)))
|
836 | a697a334 | Alex Williamson | return;
|
837 | a697a334 | Alex Williamson | |
838 | a697a334 | Alex Williamson | ret = virtio_net_flush_tx(n, n->tx_vq); |
839 | a697a334 | Alex Williamson | if (ret == -EBUSY) {
|
840 | a697a334 | Alex Williamson | return; /* Notification re-enable handled by tx_complete */ |
841 | a697a334 | Alex Williamson | } |
842 | a697a334 | Alex Williamson | |
843 | a697a334 | Alex Williamson | /* If we flush a full burst of packets, assume there are
|
844 | a697a334 | Alex Williamson | * more coming and immediately reschedule */
|
845 | a697a334 | Alex Williamson | if (ret >= n->tx_burst) {
|
846 | a697a334 | Alex Williamson | qemu_bh_schedule(n->tx_bh); |
847 | a697a334 | Alex Williamson | n->tx_waiting = 1;
|
848 | a697a334 | Alex Williamson | return;
|
849 | a697a334 | Alex Williamson | } |
850 | a697a334 | Alex Williamson | |
851 | a697a334 | Alex Williamson | /* If less than a full burst, re-enable notification and flush
|
852 | a697a334 | Alex Williamson | * anything that may have come in while we weren't looking. If
|
853 | a697a334 | Alex Williamson | * we find something, assume the guest is still active and reschedule */
|
854 | a697a334 | Alex Williamson | virtio_queue_set_notification(n->tx_vq, 1);
|
855 | a697a334 | Alex Williamson | if (virtio_net_flush_tx(n, n->tx_vq) > 0) { |
856 | a697a334 | Alex Williamson | virtio_queue_set_notification(n->tx_vq, 0);
|
857 | a697a334 | Alex Williamson | qemu_bh_schedule(n->tx_bh); |
858 | a697a334 | Alex Williamson | n->tx_waiting = 1;
|
859 | a697a334 | Alex Williamson | } |
860 | a697a334 | Alex Williamson | } |
861 | a697a334 | Alex Williamson | |
862 | fbe78f4f | aliguori | static void virtio_net_save(QEMUFile *f, void *opaque) |
863 | fbe78f4f | aliguori | { |
864 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
865 | fbe78f4f | aliguori | |
866 | afbaa7b4 | Michael S. Tsirkin | /* At this point, backend must be stopped, otherwise
|
867 | afbaa7b4 | Michael S. Tsirkin | * it might keep writing to memory. */
|
868 | afbaa7b4 | Michael S. Tsirkin | assert(!n->vhost_started); |
869 | fbe78f4f | aliguori | virtio_save(&n->vdev, f); |
870 | fbe78f4f | aliguori | |
871 | 79674068 | aliguori | qemu_put_buffer(f, n->mac, ETH_ALEN); |
872 | 4b4b8d36 | Alex Williamson | qemu_put_be32(f, n->tx_waiting); |
873 | e46cb38f | aliguori | qemu_put_be32(f, n->mergeable_rx_bufs); |
874 | 9d6271b8 | aliguori | qemu_put_be16(f, n->status); |
875 | f10c592e | Alex Williamson | qemu_put_byte(f, n->promisc); |
876 | f10c592e | Alex Williamson | qemu_put_byte(f, n->allmulti); |
877 | b6503ed9 | aliguori | qemu_put_be32(f, n->mac_table.in_use); |
878 | b6503ed9 | aliguori | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
879 | f21c0ed9 | aliguori | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
880 | 3a330134 | Mark McLoughlin | qemu_put_be32(f, n->has_vnet_hdr); |
881 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.multi_overflow); |
882 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.uni_overflow); |
883 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->alluni); |
884 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nomulti); |
885 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nouni); |
886 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nobcast); |
887 | 0ce0e8f4 | Mark McLoughlin | qemu_put_byte(f, n->has_ufo); |
888 | fbe78f4f | aliguori | } |
889 | fbe78f4f | aliguori | |
890 | fbe78f4f | aliguori | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
891 | fbe78f4f | aliguori | { |
892 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
893 | 2d9aba39 | Alex Williamson | int i;
|
894 | fbe78f4f | aliguori | |
895 | 9d6271b8 | aliguori | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
896 | fbe78f4f | aliguori | return -EINVAL;
|
897 | fbe78f4f | aliguori | |
898 | fbe78f4f | aliguori | virtio_load(&n->vdev, f); |
899 | fbe78f4f | aliguori | |
900 | 79674068 | aliguori | qemu_get_buffer(f, n->mac, ETH_ALEN); |
901 | 4b4b8d36 | Alex Williamson | n->tx_waiting = qemu_get_be32(f); |
902 | e46cb38f | aliguori | n->mergeable_rx_bufs = qemu_get_be32(f); |
903 | fbe78f4f | aliguori | |
904 | 9d6271b8 | aliguori | if (version_id >= 3) |
905 | 9d6271b8 | aliguori | n->status = qemu_get_be16(f); |
906 | 9d6271b8 | aliguori | |
907 | 002437cd | aliguori | if (version_id >= 4) { |
908 | f10c592e | Alex Williamson | if (version_id < 8) { |
909 | f10c592e | Alex Williamson | n->promisc = qemu_get_be32(f); |
910 | f10c592e | Alex Williamson | n->allmulti = qemu_get_be32(f); |
911 | f10c592e | Alex Williamson | } else {
|
912 | f10c592e | Alex Williamson | n->promisc = qemu_get_byte(f); |
913 | f10c592e | Alex Williamson | n->allmulti = qemu_get_byte(f); |
914 | f10c592e | Alex Williamson | } |
915 | 002437cd | aliguori | } |
916 | 002437cd | aliguori | |
917 | b6503ed9 | aliguori | if (version_id >= 5) { |
918 | b6503ed9 | aliguori | n->mac_table.in_use = qemu_get_be32(f); |
919 | b6503ed9 | aliguori | /* MAC_TABLE_ENTRIES may be different from the saved image */
|
920 | b6503ed9 | aliguori | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
921 | b6503ed9 | aliguori | qemu_get_buffer(f, n->mac_table.macs, |
922 | b6503ed9 | aliguori | n->mac_table.in_use * ETH_ALEN); |
923 | b6503ed9 | aliguori | } else if (n->mac_table.in_use) { |
924 | b6503ed9 | aliguori | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); |
925 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
926 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
927 | b6503ed9 | aliguori | } |
928 | b6503ed9 | aliguori | } |
929 | b6503ed9 | aliguori | |
930 | f21c0ed9 | aliguori | if (version_id >= 6) |
931 | f21c0ed9 | aliguori | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
932 | f21c0ed9 | aliguori | |
933 | 3a330134 | Mark McLoughlin | if (version_id >= 7) { |
934 | 3a330134 | Mark McLoughlin | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
935 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires vnet_hdr=on");
|
936 | 3a330134 | Mark McLoughlin | return -1; |
937 | 3a330134 | Mark McLoughlin | } |
938 | 3a330134 | Mark McLoughlin | |
939 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
940 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
|
941 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
942 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
943 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
944 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
945 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
946 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
947 | 3a330134 | Mark McLoughlin | } |
948 | 6c042c16 | Alex Williamson | } |
949 | 6c042c16 | Alex Williamson | |
950 | 8fd2a2f1 | Alex Williamson | if (version_id >= 9) { |
951 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = qemu_get_byte(f); |
952 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = qemu_get_byte(f); |
953 | 8fd2a2f1 | Alex Williamson | } |
954 | 8fd2a2f1 | Alex Williamson | |
955 | 015cb166 | Alex Williamson | if (version_id >= 10) { |
956 | 015cb166 | Alex Williamson | n->alluni = qemu_get_byte(f); |
957 | 015cb166 | Alex Williamson | n->nomulti = qemu_get_byte(f); |
958 | 015cb166 | Alex Williamson | n->nouni = qemu_get_byte(f); |
959 | 015cb166 | Alex Williamson | n->nobcast = qemu_get_byte(f); |
960 | 015cb166 | Alex Williamson | } |
961 | 015cb166 | Alex Williamson | |
962 | 0ce0e8f4 | Mark McLoughlin | if (version_id >= 11) { |
963 | 0ce0e8f4 | Mark McLoughlin | if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
964 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires TUN_F_UFO support");
|
965 | 0ce0e8f4 | Mark McLoughlin | return -1; |
966 | 0ce0e8f4 | Mark McLoughlin | } |
967 | 0ce0e8f4 | Mark McLoughlin | } |
968 | 0ce0e8f4 | Mark McLoughlin | |
969 | 2d9aba39 | Alex Williamson | /* Find the first multicast entry in the saved MAC filter */
|
970 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.in_use; i++) { |
971 | 2d9aba39 | Alex Williamson | if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
972 | 2d9aba39 | Alex Williamson | break;
|
973 | 2d9aba39 | Alex Williamson | } |
974 | 2d9aba39 | Alex Williamson | } |
975 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = i; |
976 | fbe78f4f | aliguori | return 0; |
977 | fbe78f4f | aliguori | } |
978 | fbe78f4f | aliguori | |
979 | eb6b6c12 | Mark McLoughlin | static void virtio_net_cleanup(VLANClientState *nc) |
980 | b946a153 | aliguori | { |
981 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
982 | b946a153 | aliguori | |
983 | eb6b6c12 | Mark McLoughlin | n->nic = NULL;
|
984 | b946a153 | aliguori | } |
985 | b946a153 | aliguori | |
986 | eb6b6c12 | Mark McLoughlin | static NetClientInfo net_virtio_info = {
|
987 | eb6b6c12 | Mark McLoughlin | .type = NET_CLIENT_TYPE_NIC, |
988 | eb6b6c12 | Mark McLoughlin | .size = sizeof(NICState),
|
989 | eb6b6c12 | Mark McLoughlin | .can_receive = virtio_net_can_receive, |
990 | eb6b6c12 | Mark McLoughlin | .receive = virtio_net_receive, |
991 | eb6b6c12 | Mark McLoughlin | .cleanup = virtio_net_cleanup, |
992 | eb6b6c12 | Mark McLoughlin | .link_status_changed = virtio_net_set_link_status, |
993 | eb6b6c12 | Mark McLoughlin | }; |
994 | eb6b6c12 | Mark McLoughlin | |
995 | f0c07c7c | Alex Williamson | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
996 | f0c07c7c | Alex Williamson | virtio_net_conf *net) |
997 | fbe78f4f | aliguori | { |
998 | fbe78f4f | aliguori | VirtIONet *n; |
999 | fbe78f4f | aliguori | |
1000 | 53c25cea | Paul Brook | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
|
1001 | 53c25cea | Paul Brook | sizeof(struct virtio_net_config), |
1002 | 53c25cea | Paul Brook | sizeof(VirtIONet));
|
1003 | fbe78f4f | aliguori | |
1004 | 0f03eca6 | aliguori | n->vdev.get_config = virtio_net_get_config; |
1005 | 0f03eca6 | aliguori | n->vdev.set_config = virtio_net_set_config; |
1006 | fbe78f4f | aliguori | n->vdev.get_features = virtio_net_get_features; |
1007 | fbe78f4f | aliguori | n->vdev.set_features = virtio_net_set_features; |
1008 | 8eca6b1b | aliguori | n->vdev.bad_features = virtio_net_bad_features; |
1009 | 002437cd | aliguori | n->vdev.reset = virtio_net_reset; |
1010 | 9bc6304c | Michael S. Tsirkin | n->vdev.set_status = virtio_net_set_status; |
1011 | fbe78f4f | aliguori | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
|
1012 | a697a334 | Alex Williamson | |
1013 | a697a334 | Alex Williamson | if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) { |
1014 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net: "
|
1015 | e7b43f7e | Stefan Hajnoczi | "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
|
1016 | e7b43f7e | Stefan Hajnoczi | net->tx); |
1017 | e7b43f7e | Stefan Hajnoczi | error_report("Defaulting to \"bh\"");
|
1018 | a697a334 | Alex Williamson | } |
1019 | a697a334 | Alex Williamson | |
1020 | a697a334 | Alex Williamson | if (net->tx && !strcmp(net->tx, "timer")) { |
1021 | a697a334 | Alex Williamson | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_timer);
|
1022 | 74475455 | Paolo Bonzini | n->tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer, n); |
1023 | a697a334 | Alex Williamson | n->tx_timeout = net->txtimer; |
1024 | a697a334 | Alex Williamson | } else {
|
1025 | a697a334 | Alex Williamson | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx_bh);
|
1026 | a697a334 | Alex Williamson | n->tx_bh = qemu_bh_new(virtio_net_tx_bh, n); |
1027 | a697a334 | Alex Williamson | } |
1028 | 4ffb17f5 | Alex Williamson | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
|
1029 | 97b15621 | Gerd Hoffmann | qemu_macaddr_default_if_unset(&conf->macaddr); |
1030 | 3cbe04c4 | Mark McLoughlin | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
1031 | 554c97dd | aliguori | n->status = VIRTIO_NET_S_LINK_UP; |
1032 | fbe78f4f | aliguori | |
1033 | eb6b6c12 | Mark McLoughlin | n->nic = qemu_new_nic(&net_virtio_info, conf, dev->info->name, dev->id, n); |
1034 | eb6b6c12 | Mark McLoughlin | |
1035 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); |
1036 | 96d5e201 | aliguori | |
1037 | 4b4b8d36 | Alex Williamson | n->tx_waiting = 0;
|
1038 | e3f30488 | Alex Williamson | n->tx_burst = net->txburst; |
1039 | fbe78f4f | aliguori | n->mergeable_rx_bufs = 0;
|
1040 | 002437cd | aliguori | n->promisc = 1; /* for compatibility */ |
1041 | fbe78f4f | aliguori | |
1042 | b6503ed9 | aliguori | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
1043 | b6503ed9 | aliguori | |
1044 | f21c0ed9 | aliguori | n->vlans = qemu_mallocz(MAX_VLAN >> 3);
|
1045 | f21c0ed9 | aliguori | |
1046 | 01657c86 | Alex Williamson | n->qdev = dev; |
1047 | 01657c86 | Alex Williamson | register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, |
1048 | fbe78f4f | aliguori | virtio_net_save, virtio_net_load, n); |
1049 | cf21e106 | Paul Brook | |
1050 | 1ca4d09a | Gleb Natapov | add_boot_device_path(conf->bootindex, dev, "/ethernet-phy@0");
|
1051 | 1ca4d09a | Gleb Natapov | |
1052 | 53c25cea | Paul Brook | return &n->vdev;
|
1053 | cf21e106 | Paul Brook | } |
1054 | 97b15621 | Gerd Hoffmann | |
1055 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev)
|
1056 | 97b15621 | Gerd Hoffmann | { |
1057 | 97b15621 | Gerd Hoffmann | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); |
1058 | 9bc6304c | Michael S. Tsirkin | |
1059 | afbaa7b4 | Michael S. Tsirkin | /* This will stop vhost backend if appropriate. */
|
1060 | afbaa7b4 | Michael S. Tsirkin | virtio_net_set_status(vdev, 0);
|
1061 | 97b15621 | Gerd Hoffmann | |
1062 | eb6b6c12 | Mark McLoughlin | qemu_purge_queued_packets(&n->nic->nc); |
1063 | 97b15621 | Gerd Hoffmann | |
1064 | 01657c86 | Alex Williamson | unregister_savevm(n->qdev, "virtio-net", n);
|
1065 | 97b15621 | Gerd Hoffmann | |
1066 | 97b15621 | Gerd Hoffmann | qemu_free(n->mac_table.macs); |
1067 | 97b15621 | Gerd Hoffmann | qemu_free(n->vlans); |
1068 | 97b15621 | Gerd Hoffmann | |
1069 | a697a334 | Alex Williamson | if (n->tx_timer) {
|
1070 | a697a334 | Alex Williamson | qemu_del_timer(n->tx_timer); |
1071 | a697a334 | Alex Williamson | qemu_free_timer(n->tx_timer); |
1072 | a697a334 | Alex Williamson | } else {
|
1073 | a697a334 | Alex Williamson | qemu_bh_delete(n->tx_bh); |
1074 | a697a334 | Alex Williamson | } |
1075 | 97b15621 | Gerd Hoffmann | |
1076 | 97b15621 | Gerd Hoffmann | virtio_cleanup(&n->vdev); |
1077 | eb6b6c12 | Mark McLoughlin | qemu_del_vlan_client(&n->nic->nc); |
1078 | 97b15621 | Gerd Hoffmann | } |