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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 | fbe78f4f | aliguori | #include "virtio.h" |
15 | fbe78f4f | aliguori | #include "net.h" |
16 | 7200ac3c | Mark McLoughlin | #include "net/checksum.h" |
17 | a8ed73f7 | Mark McLoughlin | #include "net/tap.h" |
18 | 2f792016 | Markus Armbruster | #include "qemu-error.h" |
19 | fbe78f4f | aliguori | #include "qemu-timer.h" |
20 | fbe78f4f | aliguori | #include "virtio-net.h" |
21 | 9bc6304c | Michael S. Tsirkin | #include "vhost_net.h" |
22 | fbe78f4f | aliguori | |
23 | 0ce0e8f4 | Mark McLoughlin | #define VIRTIO_NET_VM_VERSION 11 |
24 | b6503ed9 | aliguori | |
25 | 4ffb17f5 | Alex Williamson | #define MAC_TABLE_ENTRIES 64 |
26 | f21c0ed9 | aliguori | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
27 | 9d6271b8 | aliguori | |
28 | fbe78f4f | aliguori | typedef struct VirtIONet |
29 | fbe78f4f | aliguori | { |
30 | fbe78f4f | aliguori | VirtIODevice vdev; |
31 | 79674068 | aliguori | uint8_t mac[ETH_ALEN]; |
32 | 554c97dd | aliguori | uint16_t status; |
33 | fbe78f4f | aliguori | VirtQueue *rx_vq; |
34 | fbe78f4f | aliguori | VirtQueue *tx_vq; |
35 | 3d11d36c | aliguori | VirtQueue *ctrl_vq; |
36 | eb6b6c12 | Mark McLoughlin | NICState *nic; |
37 | fbe78f4f | aliguori | QEMUTimer *tx_timer; |
38 | fbe78f4f | aliguori | int tx_timer_active;
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39 | 3a330134 | Mark McLoughlin | uint32_t has_vnet_hdr; |
40 | 0ce0e8f4 | Mark McLoughlin | uint8_t has_ufo; |
41 | 6243375f | Mark McLoughlin | struct {
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42 | 6243375f | Mark McLoughlin | VirtQueueElement elem; |
43 | 6243375f | Mark McLoughlin | ssize_t len; |
44 | 6243375f | Mark McLoughlin | } async_tx; |
45 | fbe78f4f | aliguori | int mergeable_rx_bufs;
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46 | f10c592e | Alex Williamson | uint8_t promisc; |
47 | f10c592e | Alex Williamson | uint8_t allmulti; |
48 | 015cb166 | Alex Williamson | uint8_t alluni; |
49 | 015cb166 | Alex Williamson | uint8_t nomulti; |
50 | 015cb166 | Alex Williamson | uint8_t nouni; |
51 | 015cb166 | Alex Williamson | uint8_t nobcast; |
52 | 9bc6304c | Michael S. Tsirkin | uint8_t vhost_started; |
53 | 9bc6304c | Michael S. Tsirkin | VMChangeStateEntry *vmstate; |
54 | b6503ed9 | aliguori | struct {
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55 | b6503ed9 | aliguori | int in_use;
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56 | 2d9aba39 | Alex Williamson | int first_multi;
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57 | 8fd2a2f1 | Alex Williamson | uint8_t multi_overflow; |
58 | 8fd2a2f1 | Alex Williamson | uint8_t uni_overflow; |
59 | b6503ed9 | aliguori | uint8_t *macs; |
60 | b6503ed9 | aliguori | } mac_table; |
61 | f21c0ed9 | aliguori | uint32_t *vlans; |
62 | fbe78f4f | aliguori | } VirtIONet; |
63 | fbe78f4f | aliguori | |
64 | fbe78f4f | aliguori | /* TODO
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65 | fbe78f4f | aliguori | * - we could suppress RX interrupt if we were so inclined.
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66 | fbe78f4f | aliguori | */
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67 | fbe78f4f | aliguori | |
68 | fbe78f4f | aliguori | static VirtIONet *to_virtio_net(VirtIODevice *vdev)
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69 | fbe78f4f | aliguori | { |
70 | fbe78f4f | aliguori | return (VirtIONet *)vdev;
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71 | fbe78f4f | aliguori | } |
72 | fbe78f4f | aliguori | |
73 | 0f03eca6 | aliguori | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
74 | fbe78f4f | aliguori | { |
75 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
76 | fbe78f4f | aliguori | struct virtio_net_config netcfg;
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77 | fbe78f4f | aliguori | |
78 | 554c97dd | aliguori | netcfg.status = n->status; |
79 | 79674068 | aliguori | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
80 | fbe78f4f | aliguori | memcpy(config, &netcfg, sizeof(netcfg));
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81 | fbe78f4f | aliguori | } |
82 | fbe78f4f | aliguori | |
83 | 0f03eca6 | aliguori | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
84 | 0f03eca6 | aliguori | { |
85 | 0f03eca6 | aliguori | VirtIONet *n = to_virtio_net(vdev); |
86 | 0f03eca6 | aliguori | struct virtio_net_config netcfg;
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87 | 0f03eca6 | aliguori | |
88 | 0f03eca6 | aliguori | memcpy(&netcfg, config, sizeof(netcfg));
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89 | 0f03eca6 | aliguori | |
90 | 79674068 | aliguori | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
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91 | 79674068 | aliguori | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
92 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
93 | 0f03eca6 | aliguori | } |
94 | 0f03eca6 | aliguori | } |
95 | 0f03eca6 | aliguori | |
96 | eb6b6c12 | Mark McLoughlin | static void virtio_net_set_link_status(VLANClientState *nc) |
97 | 554c97dd | aliguori | { |
98 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
99 | 554c97dd | aliguori | uint16_t old_status = n->status; |
100 | 554c97dd | aliguori | |
101 | eb6b6c12 | Mark McLoughlin | if (nc->link_down)
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102 | 554c97dd | aliguori | n->status &= ~VIRTIO_NET_S_LINK_UP; |
103 | 554c97dd | aliguori | else
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104 | 554c97dd | aliguori | n->status |= VIRTIO_NET_S_LINK_UP; |
105 | 554c97dd | aliguori | |
106 | 554c97dd | aliguori | if (n->status != old_status)
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107 | 554c97dd | aliguori | virtio_notify_config(&n->vdev); |
108 | 554c97dd | aliguori | } |
109 | 554c97dd | aliguori | |
110 | 002437cd | aliguori | static void virtio_net_reset(VirtIODevice *vdev) |
111 | 002437cd | aliguori | { |
112 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
113 | 002437cd | aliguori | |
114 | 002437cd | aliguori | /* Reset back to compatibility mode */
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115 | 002437cd | aliguori | n->promisc = 1;
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116 | 002437cd | aliguori | n->allmulti = 0;
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117 | 015cb166 | Alex Williamson | n->alluni = 0;
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118 | 015cb166 | Alex Williamson | n->nomulti = 0;
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119 | 015cb166 | Alex Williamson | n->nouni = 0;
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120 | 015cb166 | Alex Williamson | n->nobcast = 0;
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121 | 9bc6304c | Michael S. Tsirkin | if (n->vhost_started) {
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122 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); |
123 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 0;
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124 | 9bc6304c | Michael S. Tsirkin | } |
125 | b6503ed9 | aliguori | |
126 | f21c0ed9 | aliguori | /* Flush any MAC and VLAN filter table state */
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127 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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128 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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129 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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130 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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131 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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132 | f21c0ed9 | aliguori | memset(n->vlans, 0, MAX_VLAN >> 3); |
133 | 002437cd | aliguori | } |
134 | 002437cd | aliguori | |
135 | 3a330134 | Mark McLoughlin | static int peer_has_vnet_hdr(VirtIONet *n) |
136 | 3a330134 | Mark McLoughlin | { |
137 | eb6b6c12 | Mark McLoughlin | if (!n->nic->nc.peer)
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138 | 3a330134 | Mark McLoughlin | return 0; |
139 | 3a330134 | Mark McLoughlin | |
140 | 665a3b07 | Mark McLoughlin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP)
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141 | 3a330134 | Mark McLoughlin | return 0; |
142 | 3a330134 | Mark McLoughlin | |
143 | eb6b6c12 | Mark McLoughlin | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
144 | 3a330134 | Mark McLoughlin | |
145 | 3a330134 | Mark McLoughlin | return n->has_vnet_hdr;
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146 | 3a330134 | Mark McLoughlin | } |
147 | 3a330134 | Mark McLoughlin | |
148 | 0ce0e8f4 | Mark McLoughlin | static int peer_has_ufo(VirtIONet *n) |
149 | 0ce0e8f4 | Mark McLoughlin | { |
150 | 0ce0e8f4 | Mark McLoughlin | if (!peer_has_vnet_hdr(n))
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151 | 0ce0e8f4 | Mark McLoughlin | return 0; |
152 | 0ce0e8f4 | Mark McLoughlin | |
153 | eb6b6c12 | Mark McLoughlin | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
154 | 0ce0e8f4 | Mark McLoughlin | |
155 | 0ce0e8f4 | Mark McLoughlin | return n->has_ufo;
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156 | 0ce0e8f4 | Mark McLoughlin | } |
157 | 0ce0e8f4 | Mark McLoughlin | |
158 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
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159 | fbe78f4f | aliguori | { |
160 | 3a330134 | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
161 | fbe78f4f | aliguori | |
162 | c9f79a3f | Michael S. Tsirkin | features |= (1 << VIRTIO_NET_F_MAC);
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163 | c9f79a3f | Michael S. Tsirkin | |
164 | 3a330134 | Mark McLoughlin | if (peer_has_vnet_hdr(n)) {
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165 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
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166 | 8172539d | Michael S. Tsirkin | } else {
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167 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_CSUM);
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168 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
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169 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
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170 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
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171 | 8172539d | Michael S. Tsirkin | |
172 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
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173 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
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174 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
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175 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
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176 | 8172539d | Michael S. Tsirkin | } |
177 | 3a330134 | Mark McLoughlin | |
178 | 8172539d | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
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179 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
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180 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
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181 | 3a330134 | Mark McLoughlin | } |
182 | 3a330134 | Mark McLoughlin | |
183 | 9bc6304c | Michael S. Tsirkin | if (!n->nic->nc.peer ||
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184 | 9bc6304c | Michael S. Tsirkin | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
185 | 9bc6304c | Michael S. Tsirkin | return features;
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186 | 9bc6304c | Michael S. Tsirkin | } |
187 | 9bc6304c | Michael S. Tsirkin | if (!tap_get_vhost_net(n->nic->nc.peer)) {
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188 | 9bc6304c | Michael S. Tsirkin | return features;
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189 | 9bc6304c | Michael S. Tsirkin | } |
190 | 9bc6304c | Michael S. Tsirkin | return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features);
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191 | fbe78f4f | aliguori | } |
192 | fbe78f4f | aliguori | |
193 | 8eca6b1b | aliguori | static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
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194 | 8eca6b1b | aliguori | { |
195 | 8eca6b1b | aliguori | uint32_t features = 0;
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196 | 8eca6b1b | aliguori | |
197 | 8eca6b1b | aliguori | /* Linux kernel 2.6.25. It understood MAC (as everyone must),
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198 | 8eca6b1b | aliguori | * but also these: */
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199 | 8eca6b1b | aliguori | features |= (1 << VIRTIO_NET_F_MAC);
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200 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_CSUM);
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201 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO4);
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202 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO6);
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203 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_ECN);
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204 | 8eca6b1b | aliguori | |
205 | 8172539d | Michael S. Tsirkin | return features;
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206 | 8eca6b1b | aliguori | } |
207 | 8eca6b1b | aliguori | |
208 | fbe78f4f | aliguori | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
209 | fbe78f4f | aliguori | { |
210 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
211 | fbe78f4f | aliguori | |
212 | fbe78f4f | aliguori | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
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213 | f5436dd9 | Mark McLoughlin | |
214 | f5436dd9 | Mark McLoughlin | if (n->has_vnet_hdr) {
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215 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
216 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
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217 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
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218 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
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219 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_ECN) & 1,
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220 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_UFO) & 1);
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221 | f5436dd9 | Mark McLoughlin | } |
222 | fbe78f4f | aliguori | } |
223 | fbe78f4f | aliguori | |
224 | 002437cd | aliguori | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
225 | 002437cd | aliguori | VirtQueueElement *elem) |
226 | 002437cd | aliguori | { |
227 | 002437cd | aliguori | uint8_t on; |
228 | 002437cd | aliguori | |
229 | 002437cd | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { |
230 | 002437cd | aliguori | fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
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231 | 002437cd | aliguori | exit(1);
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232 | 002437cd | aliguori | } |
233 | 002437cd | aliguori | |
234 | 002437cd | aliguori | on = ldub_p(elem->out_sg[1].iov_base);
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235 | 002437cd | aliguori | |
236 | 002437cd | aliguori | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
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237 | 002437cd | aliguori | n->promisc = on; |
238 | 002437cd | aliguori | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) |
239 | 002437cd | aliguori | n->allmulti = on; |
240 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
241 | 015cb166 | Alex Williamson | n->alluni = on; |
242 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) |
243 | 015cb166 | Alex Williamson | n->nomulti = on; |
244 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) |
245 | 015cb166 | Alex Williamson | n->nouni = on; |
246 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) |
247 | 015cb166 | Alex Williamson | n->nobcast = on; |
248 | 002437cd | aliguori | else
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249 | 002437cd | aliguori | return VIRTIO_NET_ERR;
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250 | 002437cd | aliguori | |
251 | 002437cd | aliguori | return VIRTIO_NET_OK;
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252 | 002437cd | aliguori | } |
253 | 002437cd | aliguori | |
254 | b6503ed9 | aliguori | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
255 | b6503ed9 | aliguori | VirtQueueElement *elem) |
256 | b6503ed9 | aliguori | { |
257 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac mac_data;
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258 | b6503ed9 | aliguori | |
259 | b6503ed9 | aliguori | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || |
260 | b6503ed9 | aliguori | elem->out_sg[1].iov_len < sizeof(mac_data) || |
261 | b6503ed9 | aliguori | elem->out_sg[2].iov_len < sizeof(mac_data)) |
262 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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263 | b6503ed9 | aliguori | |
264 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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265 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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266 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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267 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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268 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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269 | b6503ed9 | aliguori | |
270 | b6503ed9 | aliguori | mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base);
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271 | b6503ed9 | aliguori | |
272 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
273 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
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274 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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275 | b6503ed9 | aliguori | |
276 | b6503ed9 | aliguori | if (mac_data.entries <= MAC_TABLE_ENTRIES) {
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277 | b6503ed9 | aliguori | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), |
278 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
279 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
280 | b6503ed9 | aliguori | } else {
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281 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 1;
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282 | b6503ed9 | aliguori | } |
283 | b6503ed9 | aliguori | |
284 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = n->mac_table.in_use; |
285 | 2d9aba39 | Alex Williamson | |
286 | b6503ed9 | aliguori | mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base);
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287 | b6503ed9 | aliguori | |
288 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
289 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
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290 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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291 | b6503ed9 | aliguori | |
292 | b6503ed9 | aliguori | if (mac_data.entries) {
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293 | b6503ed9 | aliguori | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
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294 | b6503ed9 | aliguori | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), |
295 | b6503ed9 | aliguori | elem->out_sg[2].iov_base + sizeof(mac_data), |
296 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
297 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
298 | 8fd2a2f1 | Alex Williamson | } else {
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299 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 1;
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300 | 8fd2a2f1 | Alex Williamson | } |
301 | b6503ed9 | aliguori | } |
302 | b6503ed9 | aliguori | |
303 | b6503ed9 | aliguori | return VIRTIO_NET_OK;
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304 | b6503ed9 | aliguori | } |
305 | b6503ed9 | aliguori | |
306 | f21c0ed9 | aliguori | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
307 | f21c0ed9 | aliguori | VirtQueueElement *elem) |
308 | f21c0ed9 | aliguori | { |
309 | f21c0ed9 | aliguori | uint16_t vid; |
310 | f21c0ed9 | aliguori | |
311 | f21c0ed9 | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { |
312 | f21c0ed9 | aliguori | fprintf(stderr, "virtio-net ctrl invalid vlan command\n");
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313 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
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314 | f21c0ed9 | aliguori | } |
315 | f21c0ed9 | aliguori | |
316 | f21c0ed9 | aliguori | vid = lduw_le_p(elem->out_sg[1].iov_base);
|
317 | f21c0ed9 | aliguori | |
318 | f21c0ed9 | aliguori | if (vid >= MAX_VLAN)
|
319 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
320 | f21c0ed9 | aliguori | |
321 | f21c0ed9 | aliguori | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
322 | f21c0ed9 | aliguori | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
323 | f21c0ed9 | aliguori | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
324 | f21c0ed9 | aliguori | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
325 | f21c0ed9 | aliguori | else
|
326 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
327 | f21c0ed9 | aliguori | |
328 | f21c0ed9 | aliguori | return VIRTIO_NET_OK;
|
329 | f21c0ed9 | aliguori | } |
330 | f21c0ed9 | aliguori | |
331 | 3d11d36c | aliguori | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
332 | 3d11d36c | aliguori | { |
333 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
334 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr ctrl;
|
335 | 3d11d36c | aliguori | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
336 | 3d11d36c | aliguori | VirtQueueElement elem; |
337 | 3d11d36c | aliguori | |
338 | 3d11d36c | aliguori | while (virtqueue_pop(vq, &elem)) {
|
339 | 3d11d36c | aliguori | if ((elem.in_num < 1) || (elem.out_num < 1)) { |
340 | 3d11d36c | aliguori | fprintf(stderr, "virtio-net ctrl missing headers\n");
|
341 | 3d11d36c | aliguori | exit(1);
|
342 | 3d11d36c | aliguori | } |
343 | 3d11d36c | aliguori | |
344 | 3d11d36c | aliguori | if (elem.out_sg[0].iov_len < sizeof(ctrl) || |
345 | c6bb9a32 | aliguori | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
346 | 3d11d36c | aliguori | fprintf(stderr, "virtio-net ctrl header not in correct element\n");
|
347 | 3d11d36c | aliguori | exit(1);
|
348 | 3d11d36c | aliguori | } |
349 | 3d11d36c | aliguori | |
350 | 3d11d36c | aliguori | ctrl.class = ldub_p(elem.out_sg[0].iov_base);
|
351 | 3d11d36c | aliguori | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); |
352 | 3d11d36c | aliguori | |
353 | 002437cd | aliguori | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
|
354 | 002437cd | aliguori | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); |
355 | b6503ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
356 | b6503ed9 | aliguori | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); |
357 | f21c0ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
358 | f21c0ed9 | aliguori | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); |
359 | 002437cd | aliguori | |
360 | 3d11d36c | aliguori | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
|
361 | 3d11d36c | aliguori | |
362 | 3d11d36c | aliguori | virtqueue_push(vq, &elem, sizeof(status));
|
363 | 3d11d36c | aliguori | virtio_notify(vdev, vq); |
364 | 3d11d36c | aliguori | } |
365 | 3d11d36c | aliguori | } |
366 | 3d11d36c | aliguori | |
367 | fbe78f4f | aliguori | /* RX */
|
368 | fbe78f4f | aliguori | |
369 | fbe78f4f | aliguori | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
370 | fbe78f4f | aliguori | { |
371 | 8aeff62d | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
372 | 8aeff62d | Mark McLoughlin | |
373 | eb6b6c12 | Mark McLoughlin | qemu_flush_queued_packets(&n->nic->nc); |
374 | a61d1f67 | Glauber Costa | |
375 | a61d1f67 | Glauber Costa | /* We now have RX buffers, signal to the IO thread to break out of the
|
376 | a61d1f67 | Glauber Costa | * select to re-poll the tap file descriptor */
|
377 | a61d1f67 | Glauber Costa | qemu_notify_event(); |
378 | fbe78f4f | aliguori | } |
379 | fbe78f4f | aliguori | |
380 | eb6b6c12 | Mark McLoughlin | static int virtio_net_can_receive(VLANClientState *nc) |
381 | fbe78f4f | aliguori | { |
382 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
383 | cdd5cc12 | Mark McLoughlin | |
384 | fbe78f4f | aliguori | if (!virtio_queue_ready(n->rx_vq) ||
|
385 | fbe78f4f | aliguori | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
386 | fbe78f4f | aliguori | return 0; |
387 | fbe78f4f | aliguori | |
388 | cdd5cc12 | Mark McLoughlin | return 1; |
389 | cdd5cc12 | Mark McLoughlin | } |
390 | cdd5cc12 | Mark McLoughlin | |
391 | cdd5cc12 | Mark McLoughlin | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) |
392 | cdd5cc12 | Mark McLoughlin | { |
393 | fbe78f4f | aliguori | if (virtio_queue_empty(n->rx_vq) ||
|
394 | fbe78f4f | aliguori | (n->mergeable_rx_bufs && |
395 | fbe78f4f | aliguori | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
|
396 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 1);
|
397 | 06b12970 | Tom Lendacky | |
398 | 06b12970 | Tom Lendacky | /* To avoid a race condition where the guest has made some buffers
|
399 | 06b12970 | Tom Lendacky | * available after the above check but before notification was
|
400 | 06b12970 | Tom Lendacky | * enabled, check for available buffers again.
|
401 | 06b12970 | Tom Lendacky | */
|
402 | 06b12970 | Tom Lendacky | if (virtio_queue_empty(n->rx_vq) ||
|
403 | 06b12970 | Tom Lendacky | (n->mergeable_rx_bufs && |
404 | 06b12970 | Tom Lendacky | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0)))
|
405 | 06b12970 | Tom Lendacky | return 0; |
406 | fbe78f4f | aliguori | } |
407 | fbe78f4f | aliguori | |
408 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 0);
|
409 | fbe78f4f | aliguori | return 1; |
410 | fbe78f4f | aliguori | } |
411 | fbe78f4f | aliguori | |
412 | 1d41b0c1 | Anthony Liguori | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
413 | 1d41b0c1 | Anthony Liguori | * it never finds out that the packets don't have valid checksums. This
|
414 | 1d41b0c1 | Anthony Liguori | * causes dhclient to get upset. Fedora's carried a patch for ages to
|
415 | 1d41b0c1 | Anthony Liguori | * fix this with Xen but it hasn't appeared in an upstream release of
|
416 | 1d41b0c1 | Anthony Liguori | * dhclient yet.
|
417 | 1d41b0c1 | Anthony Liguori | *
|
418 | 1d41b0c1 | Anthony Liguori | * To avoid breaking existing guests, we catch udp packets and add
|
419 | 1d41b0c1 | Anthony Liguori | * checksums. This is terrible but it's better than hacking the guest
|
420 | 1d41b0c1 | Anthony Liguori | * kernels.
|
421 | 1d41b0c1 | Anthony Liguori | *
|
422 | 1d41b0c1 | Anthony Liguori | * N.B. if we introduce a zero-copy API, this operation is no longer free so
|
423 | 1d41b0c1 | Anthony Liguori | * we should provide a mechanism to disable it to avoid polluting the host
|
424 | 1d41b0c1 | Anthony Liguori | * cache.
|
425 | 1d41b0c1 | Anthony Liguori | */
|
426 | 1d41b0c1 | Anthony Liguori | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
427 | 1d41b0c1 | Anthony Liguori | const uint8_t *buf, size_t size)
|
428 | 1d41b0c1 | Anthony Liguori | { |
429 | 1d41b0c1 | Anthony Liguori | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
430 | 1d41b0c1 | Anthony Liguori | (size > 27 && size < 1500) && /* normal sized MTU */ |
431 | 1d41b0c1 | Anthony Liguori | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
432 | 1d41b0c1 | Anthony Liguori | (buf[23] == 17) && /* ip.protocol == UDP */ |
433 | 1d41b0c1 | Anthony Liguori | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
434 | 1d41b0c1 | Anthony Liguori | /* FIXME this cast is evil */
|
435 | 1d41b0c1 | Anthony Liguori | net_checksum_calculate((uint8_t *)buf, size); |
436 | 1d41b0c1 | Anthony Liguori | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
437 | 1d41b0c1 | Anthony Liguori | } |
438 | 1d41b0c1 | Anthony Liguori | } |
439 | 1d41b0c1 | Anthony Liguori | |
440 | fbe78f4f | aliguori | static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count) |
441 | fbe78f4f | aliguori | { |
442 | fbe78f4f | aliguori | int offset, i;
|
443 | fbe78f4f | aliguori | |
444 | fbe78f4f | aliguori | offset = i = 0;
|
445 | fbe78f4f | aliguori | while (offset < count && i < iovcnt) {
|
446 | fbe78f4f | aliguori | int len = MIN(iov[i].iov_len, count - offset);
|
447 | fbe78f4f | aliguori | memcpy(iov[i].iov_base, buf + offset, len); |
448 | fbe78f4f | aliguori | offset += len; |
449 | fbe78f4f | aliguori | i++; |
450 | fbe78f4f | aliguori | } |
451 | fbe78f4f | aliguori | |
452 | fbe78f4f | aliguori | return offset;
|
453 | fbe78f4f | aliguori | } |
454 | fbe78f4f | aliguori | |
455 | fbe78f4f | aliguori | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
456 | 4689f4b3 | aliguori | const void *buf, size_t size, size_t hdr_len) |
457 | fbe78f4f | aliguori | { |
458 | 3f4cb3d3 | blueswir1 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
459 | fbe78f4f | aliguori | int offset = 0; |
460 | fbe78f4f | aliguori | |
461 | fbe78f4f | aliguori | hdr->flags = 0;
|
462 | fbe78f4f | aliguori | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
463 | fbe78f4f | aliguori | |
464 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
465 | 3a330134 | Mark McLoughlin | memcpy(hdr, buf, sizeof(*hdr));
|
466 | 3a330134 | Mark McLoughlin | offset = sizeof(*hdr);
|
467 | 1d41b0c1 | Anthony Liguori | work_around_broken_dhclient(hdr, buf + offset, size - offset); |
468 | 3a330134 | Mark McLoughlin | } |
469 | 3a330134 | Mark McLoughlin | |
470 | fbe78f4f | aliguori | /* We only ever receive a struct virtio_net_hdr from the tapfd,
|
471 | fbe78f4f | aliguori | * but we may be passing along a larger header to the guest.
|
472 | fbe78f4f | aliguori | */
|
473 | fbe78f4f | aliguori | iov[0].iov_base += hdr_len;
|
474 | fbe78f4f | aliguori | iov[0].iov_len -= hdr_len;
|
475 | fbe78f4f | aliguori | |
476 | fbe78f4f | aliguori | return offset;
|
477 | fbe78f4f | aliguori | } |
478 | fbe78f4f | aliguori | |
479 | 3831ab20 | aliguori | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
480 | 3831ab20 | aliguori | { |
481 | 3831ab20 | aliguori | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
482 | f21c0ed9 | aliguori | static const uint8_t vlan[] = {0x81, 0x00}; |
483 | 3831ab20 | aliguori | uint8_t *ptr = (uint8_t *)buf; |
484 | b6503ed9 | aliguori | int i;
|
485 | 3831ab20 | aliguori | |
486 | 3831ab20 | aliguori | if (n->promisc)
|
487 | 3831ab20 | aliguori | return 1; |
488 | 3831ab20 | aliguori | |
489 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
490 | 3a330134 | Mark McLoughlin | ptr += sizeof(struct virtio_net_hdr); |
491 | 3a330134 | Mark McLoughlin | } |
492 | 3a330134 | Mark McLoughlin | |
493 | f21c0ed9 | aliguori | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
494 | f21c0ed9 | aliguori | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
495 | f21c0ed9 | aliguori | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
496 | f21c0ed9 | aliguori | return 0; |
497 | f21c0ed9 | aliguori | } |
498 | f21c0ed9 | aliguori | |
499 | bbe2f399 | Alex Williamson | if (ptr[0] & 1) { // multicast |
500 | bbe2f399 | Alex Williamson | if (!memcmp(ptr, bcast, sizeof(bcast))) { |
501 | 015cb166 | Alex Williamson | return !n->nobcast;
|
502 | 015cb166 | Alex Williamson | } else if (n->nomulti) { |
503 | 015cb166 | Alex Williamson | return 0; |
504 | 8fd2a2f1 | Alex Williamson | } else if (n->allmulti || n->mac_table.multi_overflow) { |
505 | bbe2f399 | Alex Williamson | return 1; |
506 | bbe2f399 | Alex Williamson | } |
507 | 2d9aba39 | Alex Williamson | |
508 | 2d9aba39 | Alex Williamson | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
509 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
510 | 2d9aba39 | Alex Williamson | return 1; |
511 | 2d9aba39 | Alex Williamson | } |
512 | 2d9aba39 | Alex Williamson | } |
513 | bbe2f399 | Alex Williamson | } else { // unicast |
514 | 015cb166 | Alex Williamson | if (n->nouni) {
|
515 | 015cb166 | Alex Williamson | return 0; |
516 | 015cb166 | Alex Williamson | } else if (n->alluni || n->mac_table.uni_overflow) { |
517 | 8fd2a2f1 | Alex Williamson | return 1; |
518 | 8fd2a2f1 | Alex Williamson | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
519 | bbe2f399 | Alex Williamson | return 1; |
520 | bbe2f399 | Alex Williamson | } |
521 | 3831ab20 | aliguori | |
522 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.first_multi; i++) { |
523 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
524 | 2d9aba39 | Alex Williamson | return 1; |
525 | 2d9aba39 | Alex Williamson | } |
526 | 2d9aba39 | Alex Williamson | } |
527 | b6503ed9 | aliguori | } |
528 | b6503ed9 | aliguori | |
529 | 3831ab20 | aliguori | return 0; |
530 | 3831ab20 | aliguori | } |
531 | 3831ab20 | aliguori | |
532 | eb6b6c12 | Mark McLoughlin | static ssize_t virtio_net_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
533 | fbe78f4f | aliguori | { |
534 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
535 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
536 | 4689f4b3 | aliguori | size_t hdr_len, offset, i; |
537 | fbe78f4f | aliguori | |
538 | eb6b6c12 | Mark McLoughlin | if (!virtio_net_can_receive(&n->nic->nc))
|
539 | cdd5cc12 | Mark McLoughlin | return -1; |
540 | cdd5cc12 | Mark McLoughlin | |
541 | cdd5cc12 | Mark McLoughlin | if (!virtio_net_has_buffers(n, size))
|
542 | 8aeff62d | Mark McLoughlin | return 0; |
543 | fbe78f4f | aliguori | |
544 | 3831ab20 | aliguori | if (!receive_filter(n, buf, size))
|
545 | 4f1c942b | Mark McLoughlin | return size;
|
546 | 3831ab20 | aliguori | |
547 | fbe78f4f | aliguori | /* hdr_len refers to the header we supply to the guest */
|
548 | fbe78f4f | aliguori | hdr_len = n->mergeable_rx_bufs ? |
549 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
550 | fbe78f4f | aliguori | |
551 | fbe78f4f | aliguori | offset = i = 0;
|
552 | fbe78f4f | aliguori | |
553 | fbe78f4f | aliguori | while (offset < size) {
|
554 | fbe78f4f | aliguori | VirtQueueElement elem; |
555 | fbe78f4f | aliguori | int len, total;
|
556 | fbe78f4f | aliguori | struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
557 | fbe78f4f | aliguori | |
558 | 22c253d9 | Amit Shah | total = 0;
|
559 | fbe78f4f | aliguori | |
560 | fbe78f4f | aliguori | if ((i != 0 && !n->mergeable_rx_bufs) || |
561 | fbe78f4f | aliguori | virtqueue_pop(n->rx_vq, &elem) == 0) {
|
562 | fbe78f4f | aliguori | if (i == 0) |
563 | 4f1c942b | Mark McLoughlin | return -1; |
564 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net truncating packet\n");
|
565 | fbe78f4f | aliguori | exit(1);
|
566 | fbe78f4f | aliguori | } |
567 | fbe78f4f | aliguori | |
568 | fbe78f4f | aliguori | if (elem.in_num < 1) { |
569 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net receive queue contains no in buffers\n");
|
570 | fbe78f4f | aliguori | exit(1);
|
571 | fbe78f4f | aliguori | } |
572 | fbe78f4f | aliguori | |
573 | fbe78f4f | aliguori | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { |
574 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net header not in first element\n");
|
575 | fbe78f4f | aliguori | exit(1);
|
576 | fbe78f4f | aliguori | } |
577 | fbe78f4f | aliguori | |
578 | fbe78f4f | aliguori | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
579 | fbe78f4f | aliguori | |
580 | fbe78f4f | aliguori | if (i == 0) { |
581 | fbe78f4f | aliguori | if (n->mergeable_rx_bufs)
|
582 | fbe78f4f | aliguori | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
583 | fbe78f4f | aliguori | |
584 | fbe78f4f | aliguori | offset += receive_header(n, sg, elem.in_num, |
585 | fbe78f4f | aliguori | buf + offset, size - offset, hdr_len); |
586 | fbe78f4f | aliguori | total += hdr_len; |
587 | fbe78f4f | aliguori | } |
588 | fbe78f4f | aliguori | |
589 | fbe78f4f | aliguori | /* copy in packet. ugh */
|
590 | fbe78f4f | aliguori | len = iov_fill(sg, elem.in_num, |
591 | fbe78f4f | aliguori | buf + offset, size - offset); |
592 | fbe78f4f | aliguori | total += len; |
593 | fbe78f4f | aliguori | |
594 | fbe78f4f | aliguori | /* signal other side */
|
595 | fbe78f4f | aliguori | virtqueue_fill(n->rx_vq, &elem, total, i++); |
596 | fbe78f4f | aliguori | |
597 | fbe78f4f | aliguori | offset += len; |
598 | fbe78f4f | aliguori | } |
599 | fbe78f4f | aliguori | |
600 | fbe78f4f | aliguori | if (mhdr)
|
601 | fbe78f4f | aliguori | mhdr->num_buffers = i; |
602 | fbe78f4f | aliguori | |
603 | fbe78f4f | aliguori | virtqueue_flush(n->rx_vq, i); |
604 | fbe78f4f | aliguori | virtio_notify(&n->vdev, n->rx_vq); |
605 | 4f1c942b | Mark McLoughlin | |
606 | 4f1c942b | Mark McLoughlin | return size;
|
607 | fbe78f4f | aliguori | } |
608 | fbe78f4f | aliguori | |
609 | 6243375f | Mark McLoughlin | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
610 | 6243375f | Mark McLoughlin | |
611 | eb6b6c12 | Mark McLoughlin | static void virtio_net_tx_complete(VLANClientState *nc, ssize_t len) |
612 | 6243375f | Mark McLoughlin | { |
613 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
614 | 6243375f | Mark McLoughlin | |
615 | 6243375f | Mark McLoughlin | virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); |
616 | 6243375f | Mark McLoughlin | virtio_notify(&n->vdev, n->tx_vq); |
617 | 6243375f | Mark McLoughlin | |
618 | 6243375f | Mark McLoughlin | n->async_tx.elem.out_num = n->async_tx.len = 0;
|
619 | 6243375f | Mark McLoughlin | |
620 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 1);
|
621 | 6243375f | Mark McLoughlin | virtio_net_flush_tx(n, n->tx_vq); |
622 | 6243375f | Mark McLoughlin | } |
623 | 6243375f | Mark McLoughlin | |
624 | fbe78f4f | aliguori | /* TX */
|
625 | fbe78f4f | aliguori | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
626 | fbe78f4f | aliguori | { |
627 | fbe78f4f | aliguori | VirtQueueElement elem; |
628 | fbe78f4f | aliguori | |
629 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
630 | fbe78f4f | aliguori | return;
|
631 | fbe78f4f | aliguori | |
632 | 6243375f | Mark McLoughlin | if (n->async_tx.elem.out_num) {
|
633 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
634 | 6243375f | Mark McLoughlin | return;
|
635 | 6243375f | Mark McLoughlin | } |
636 | 6243375f | Mark McLoughlin | |
637 | fbe78f4f | aliguori | while (virtqueue_pop(vq, &elem)) {
|
638 | 6243375f | Mark McLoughlin | ssize_t ret, len = 0;
|
639 | fbe78f4f | aliguori | unsigned int out_num = elem.out_num; |
640 | fbe78f4f | aliguori | struct iovec *out_sg = &elem.out_sg[0]; |
641 | fbe78f4f | aliguori | unsigned hdr_len;
|
642 | fbe78f4f | aliguori | |
643 | fbe78f4f | aliguori | /* hdr_len refers to the header received from the guest */
|
644 | fbe78f4f | aliguori | hdr_len = n->mergeable_rx_bufs ? |
645 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
646 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr); |
647 | fbe78f4f | aliguori | |
648 | fbe78f4f | aliguori | if (out_num < 1 || out_sg->iov_len != hdr_len) { |
649 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net header not in first element\n");
|
650 | fbe78f4f | aliguori | exit(1);
|
651 | fbe78f4f | aliguori | } |
652 | fbe78f4f | aliguori | |
653 | fbe78f4f | aliguori | /* ignore the header if GSO is not supported */
|
654 | 3a330134 | Mark McLoughlin | if (!n->has_vnet_hdr) {
|
655 | fbe78f4f | aliguori | out_num--; |
656 | fbe78f4f | aliguori | out_sg++; |
657 | fbe78f4f | aliguori | len += hdr_len; |
658 | fbe78f4f | aliguori | } else if (n->mergeable_rx_bufs) { |
659 | fbe78f4f | aliguori | /* tapfd expects a struct virtio_net_hdr */
|
660 | fbe78f4f | aliguori | hdr_len -= sizeof(struct virtio_net_hdr); |
661 | fbe78f4f | aliguori | out_sg->iov_len -= hdr_len; |
662 | fbe78f4f | aliguori | len += hdr_len; |
663 | fbe78f4f | aliguori | } |
664 | fbe78f4f | aliguori | |
665 | eb6b6c12 | Mark McLoughlin | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
666 | 6243375f | Mark McLoughlin | virtio_net_tx_complete); |
667 | 6243375f | Mark McLoughlin | if (ret == 0) { |
668 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
669 | 6243375f | Mark McLoughlin | n->async_tx.elem = elem; |
670 | 6243375f | Mark McLoughlin | n->async_tx.len = len; |
671 | 6243375f | Mark McLoughlin | return;
|
672 | 6243375f | Mark McLoughlin | } |
673 | 6243375f | Mark McLoughlin | |
674 | 6243375f | Mark McLoughlin | len += ret; |
675 | fbe78f4f | aliguori | |
676 | fbe78f4f | aliguori | virtqueue_push(vq, &elem, len); |
677 | fbe78f4f | aliguori | virtio_notify(&n->vdev, vq); |
678 | fbe78f4f | aliguori | } |
679 | fbe78f4f | aliguori | } |
680 | fbe78f4f | aliguori | |
681 | fbe78f4f | aliguori | static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) |
682 | fbe78f4f | aliguori | { |
683 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
684 | fbe78f4f | aliguori | |
685 | fbe78f4f | aliguori | if (n->tx_timer_active) {
|
686 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 1);
|
687 | fbe78f4f | aliguori | qemu_del_timer(n->tx_timer); |
688 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
689 | fbe78f4f | aliguori | virtio_net_flush_tx(n, vq); |
690 | fbe78f4f | aliguori | } else {
|
691 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
692 | fbe78f4f | aliguori | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
693 | fbe78f4f | aliguori | n->tx_timer_active = 1;
|
694 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 0);
|
695 | fbe78f4f | aliguori | } |
696 | fbe78f4f | aliguori | } |
697 | fbe78f4f | aliguori | |
698 | fbe78f4f | aliguori | static void virtio_net_tx_timer(void *opaque) |
699 | fbe78f4f | aliguori | { |
700 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
701 | fbe78f4f | aliguori | |
702 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
703 | fbe78f4f | aliguori | |
704 | fbe78f4f | aliguori | /* Just in case the driver is not ready on more */
|
705 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
706 | fbe78f4f | aliguori | return;
|
707 | fbe78f4f | aliguori | |
708 | fbe78f4f | aliguori | virtio_queue_set_notification(n->tx_vq, 1);
|
709 | fbe78f4f | aliguori | virtio_net_flush_tx(n, n->tx_vq); |
710 | fbe78f4f | aliguori | } |
711 | fbe78f4f | aliguori | |
712 | fbe78f4f | aliguori | static void virtio_net_save(QEMUFile *f, void *opaque) |
713 | fbe78f4f | aliguori | { |
714 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
715 | fbe78f4f | aliguori | |
716 | 9bc6304c | Michael S. Tsirkin | if (n->vhost_started) {
|
717 | 9bc6304c | Michael S. Tsirkin | /* TODO: should we really stop the backend?
|
718 | 9bc6304c | Michael S. Tsirkin | * If we don't, it might keep writing to memory. */
|
719 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); |
720 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 0;
|
721 | 9bc6304c | Michael S. Tsirkin | } |
722 | fbe78f4f | aliguori | virtio_save(&n->vdev, f); |
723 | fbe78f4f | aliguori | |
724 | 79674068 | aliguori | qemu_put_buffer(f, n->mac, ETH_ALEN); |
725 | fbe78f4f | aliguori | qemu_put_be32(f, n->tx_timer_active); |
726 | e46cb38f | aliguori | qemu_put_be32(f, n->mergeable_rx_bufs); |
727 | 9d6271b8 | aliguori | qemu_put_be16(f, n->status); |
728 | f10c592e | Alex Williamson | qemu_put_byte(f, n->promisc); |
729 | f10c592e | Alex Williamson | qemu_put_byte(f, n->allmulti); |
730 | b6503ed9 | aliguori | qemu_put_be32(f, n->mac_table.in_use); |
731 | b6503ed9 | aliguori | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
732 | f21c0ed9 | aliguori | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
733 | 3a330134 | Mark McLoughlin | qemu_put_be32(f, n->has_vnet_hdr); |
734 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.multi_overflow); |
735 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.uni_overflow); |
736 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->alluni); |
737 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nomulti); |
738 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nouni); |
739 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nobcast); |
740 | 0ce0e8f4 | Mark McLoughlin | qemu_put_byte(f, n->has_ufo); |
741 | fbe78f4f | aliguori | } |
742 | fbe78f4f | aliguori | |
743 | fbe78f4f | aliguori | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
744 | fbe78f4f | aliguori | { |
745 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
746 | 2d9aba39 | Alex Williamson | int i;
|
747 | fbe78f4f | aliguori | |
748 | 9d6271b8 | aliguori | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
749 | fbe78f4f | aliguori | return -EINVAL;
|
750 | fbe78f4f | aliguori | |
751 | fbe78f4f | aliguori | virtio_load(&n->vdev, f); |
752 | fbe78f4f | aliguori | |
753 | 79674068 | aliguori | qemu_get_buffer(f, n->mac, ETH_ALEN); |
754 | fbe78f4f | aliguori | n->tx_timer_active = qemu_get_be32(f); |
755 | e46cb38f | aliguori | n->mergeable_rx_bufs = qemu_get_be32(f); |
756 | fbe78f4f | aliguori | |
757 | 9d6271b8 | aliguori | if (version_id >= 3) |
758 | 9d6271b8 | aliguori | n->status = qemu_get_be16(f); |
759 | 9d6271b8 | aliguori | |
760 | 002437cd | aliguori | if (version_id >= 4) { |
761 | f10c592e | Alex Williamson | if (version_id < 8) { |
762 | f10c592e | Alex Williamson | n->promisc = qemu_get_be32(f); |
763 | f10c592e | Alex Williamson | n->allmulti = qemu_get_be32(f); |
764 | f10c592e | Alex Williamson | } else {
|
765 | f10c592e | Alex Williamson | n->promisc = qemu_get_byte(f); |
766 | f10c592e | Alex Williamson | n->allmulti = qemu_get_byte(f); |
767 | f10c592e | Alex Williamson | } |
768 | 002437cd | aliguori | } |
769 | 002437cd | aliguori | |
770 | b6503ed9 | aliguori | if (version_id >= 5) { |
771 | b6503ed9 | aliguori | n->mac_table.in_use = qemu_get_be32(f); |
772 | b6503ed9 | aliguori | /* MAC_TABLE_ENTRIES may be different from the saved image */
|
773 | b6503ed9 | aliguori | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
774 | b6503ed9 | aliguori | qemu_get_buffer(f, n->mac_table.macs, |
775 | b6503ed9 | aliguori | n->mac_table.in_use * ETH_ALEN); |
776 | b6503ed9 | aliguori | } else if (n->mac_table.in_use) { |
777 | b6503ed9 | aliguori | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); |
778 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
779 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
780 | b6503ed9 | aliguori | } |
781 | b6503ed9 | aliguori | } |
782 | b6503ed9 | aliguori | |
783 | f21c0ed9 | aliguori | if (version_id >= 6) |
784 | f21c0ed9 | aliguori | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
785 | f21c0ed9 | aliguori | |
786 | 3a330134 | Mark McLoughlin | if (version_id >= 7) { |
787 | 3a330134 | Mark McLoughlin | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
788 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires vnet_hdr=on");
|
789 | 3a330134 | Mark McLoughlin | return -1; |
790 | 3a330134 | Mark McLoughlin | } |
791 | 3a330134 | Mark McLoughlin | |
792 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
793 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
|
794 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
795 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
796 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
797 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
798 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
799 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
800 | 3a330134 | Mark McLoughlin | } |
801 | 6c042c16 | Alex Williamson | } |
802 | 6c042c16 | Alex Williamson | |
803 | 8fd2a2f1 | Alex Williamson | if (version_id >= 9) { |
804 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = qemu_get_byte(f); |
805 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = qemu_get_byte(f); |
806 | 8fd2a2f1 | Alex Williamson | } |
807 | 8fd2a2f1 | Alex Williamson | |
808 | 015cb166 | Alex Williamson | if (version_id >= 10) { |
809 | 015cb166 | Alex Williamson | n->alluni = qemu_get_byte(f); |
810 | 015cb166 | Alex Williamson | n->nomulti = qemu_get_byte(f); |
811 | 015cb166 | Alex Williamson | n->nouni = qemu_get_byte(f); |
812 | 015cb166 | Alex Williamson | n->nobcast = qemu_get_byte(f); |
813 | 015cb166 | Alex Williamson | } |
814 | 015cb166 | Alex Williamson | |
815 | 0ce0e8f4 | Mark McLoughlin | if (version_id >= 11) { |
816 | 0ce0e8f4 | Mark McLoughlin | if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
817 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires TUN_F_UFO support");
|
818 | 0ce0e8f4 | Mark McLoughlin | return -1; |
819 | 0ce0e8f4 | Mark McLoughlin | } |
820 | 0ce0e8f4 | Mark McLoughlin | } |
821 | 0ce0e8f4 | Mark McLoughlin | |
822 | 2d9aba39 | Alex Williamson | /* Find the first multicast entry in the saved MAC filter */
|
823 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.in_use; i++) { |
824 | 2d9aba39 | Alex Williamson | if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
825 | 2d9aba39 | Alex Williamson | break;
|
826 | 2d9aba39 | Alex Williamson | } |
827 | 2d9aba39 | Alex Williamson | } |
828 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = i; |
829 | 2d9aba39 | Alex Williamson | |
830 | fbe78f4f | aliguori | if (n->tx_timer_active) {
|
831 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
832 | fbe78f4f | aliguori | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
833 | fbe78f4f | aliguori | } |
834 | fbe78f4f | aliguori | return 0; |
835 | fbe78f4f | aliguori | } |
836 | fbe78f4f | aliguori | |
837 | eb6b6c12 | Mark McLoughlin | static void virtio_net_cleanup(VLANClientState *nc) |
838 | b946a153 | aliguori | { |
839 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
840 | b946a153 | aliguori | |
841 | eb6b6c12 | Mark McLoughlin | n->nic = NULL;
|
842 | b946a153 | aliguori | } |
843 | b946a153 | aliguori | |
844 | eb6b6c12 | Mark McLoughlin | static NetClientInfo net_virtio_info = {
|
845 | eb6b6c12 | Mark McLoughlin | .type = NET_CLIENT_TYPE_NIC, |
846 | eb6b6c12 | Mark McLoughlin | .size = sizeof(NICState),
|
847 | eb6b6c12 | Mark McLoughlin | .can_receive = virtio_net_can_receive, |
848 | eb6b6c12 | Mark McLoughlin | .receive = virtio_net_receive, |
849 | eb6b6c12 | Mark McLoughlin | .cleanup = virtio_net_cleanup, |
850 | eb6b6c12 | Mark McLoughlin | .link_status_changed = virtio_net_set_link_status, |
851 | eb6b6c12 | Mark McLoughlin | }; |
852 | eb6b6c12 | Mark McLoughlin | |
853 | 9bc6304c | Michael S. Tsirkin | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
854 | 9bc6304c | Michael S. Tsirkin | { |
855 | 9bc6304c | Michael S. Tsirkin | VirtIONet *n = to_virtio_net(vdev); |
856 | 9bc6304c | Michael S. Tsirkin | if (!n->nic->nc.peer) {
|
857 | 9bc6304c | Michael S. Tsirkin | return;
|
858 | 9bc6304c | Michael S. Tsirkin | } |
859 | 9bc6304c | Michael S. Tsirkin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) {
|
860 | 9bc6304c | Michael S. Tsirkin | return;
|
861 | 9bc6304c | Michael S. Tsirkin | } |
862 | 9bc6304c | Michael S. Tsirkin | |
863 | 9bc6304c | Michael S. Tsirkin | if (!tap_get_vhost_net(n->nic->nc.peer)) {
|
864 | 9bc6304c | Michael S. Tsirkin | return;
|
865 | 9bc6304c | Michael S. Tsirkin | } |
866 | 9bc6304c | Michael S. Tsirkin | if (!!n->vhost_started == !!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
867 | 9bc6304c | Michael S. Tsirkin | return;
|
868 | 9bc6304c | Michael S. Tsirkin | } |
869 | 9bc6304c | Michael S. Tsirkin | if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
|
870 | 9bc6304c | Michael S. Tsirkin | int r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), vdev);
|
871 | 9bc6304c | Michael S. Tsirkin | if (r < 0) { |
872 | 9bc6304c | Michael S. Tsirkin | fprintf(stderr, "unable to start vhost net: %d: "
|
873 | 9bc6304c | Michael S. Tsirkin | "falling back on userspace virtio\n", -r);
|
874 | 9bc6304c | Michael S. Tsirkin | } else {
|
875 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 1;
|
876 | 9bc6304c | Michael S. Tsirkin | } |
877 | 9bc6304c | Michael S. Tsirkin | } else {
|
878 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); |
879 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 0;
|
880 | 9bc6304c | Michael S. Tsirkin | } |
881 | 9bc6304c | Michael S. Tsirkin | } |
882 | 9bc6304c | Michael S. Tsirkin | |
883 | 9bc6304c | Michael S. Tsirkin | static void virtio_net_vmstate_change(void *opaque, int running, int reason) |
884 | 9bc6304c | Michael S. Tsirkin | { |
885 | 9bc6304c | Michael S. Tsirkin | VirtIONet *n = opaque; |
886 | 9bc6304c | Michael S. Tsirkin | if (!running) {
|
887 | 9bc6304c | Michael S. Tsirkin | return;
|
888 | 9bc6304c | Michael S. Tsirkin | } |
889 | 9bc6304c | Michael S. Tsirkin | /* This is called when vm is started, it will start vhost backend if
|
890 | 9bc6304c | Michael S. Tsirkin | * appropriate e.g. after migration. */
|
891 | 9bc6304c | Michael S. Tsirkin | virtio_net_set_status(&n->vdev, n->vdev.status); |
892 | 9bc6304c | Michael S. Tsirkin | } |
893 | 9bc6304c | Michael S. Tsirkin | |
894 | 97b15621 | Gerd Hoffmann | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf) |
895 | fbe78f4f | aliguori | { |
896 | fbe78f4f | aliguori | VirtIONet *n; |
897 | fbe78f4f | aliguori | static int virtio_net_id; |
898 | fbe78f4f | aliguori | |
899 | 53c25cea | Paul Brook | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
|
900 | 53c25cea | Paul Brook | sizeof(struct virtio_net_config), |
901 | 53c25cea | Paul Brook | sizeof(VirtIONet));
|
902 | fbe78f4f | aliguori | |
903 | 0f03eca6 | aliguori | n->vdev.get_config = virtio_net_get_config; |
904 | 0f03eca6 | aliguori | n->vdev.set_config = virtio_net_set_config; |
905 | fbe78f4f | aliguori | n->vdev.get_features = virtio_net_get_features; |
906 | fbe78f4f | aliguori | n->vdev.set_features = virtio_net_set_features; |
907 | 8eca6b1b | aliguori | n->vdev.bad_features = virtio_net_bad_features; |
908 | 002437cd | aliguori | n->vdev.reset = virtio_net_reset; |
909 | 9bc6304c | Michael S. Tsirkin | n->vdev.set_status = virtio_net_set_status; |
910 | fbe78f4f | aliguori | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
|
911 | fbe78f4f | aliguori | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
|
912 | 4ffb17f5 | Alex Williamson | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
|
913 | 97b15621 | Gerd Hoffmann | qemu_macaddr_default_if_unset(&conf->macaddr); |
914 | 3cbe04c4 | Mark McLoughlin | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
915 | 554c97dd | aliguori | n->status = VIRTIO_NET_S_LINK_UP; |
916 | fbe78f4f | aliguori | |
917 | eb6b6c12 | Mark McLoughlin | n->nic = qemu_new_nic(&net_virtio_info, conf, dev->info->name, dev->id, n); |
918 | eb6b6c12 | Mark McLoughlin | |
919 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); |
920 | 96d5e201 | aliguori | |
921 | fbe78f4f | aliguori | n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
922 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
923 | fbe78f4f | aliguori | n->mergeable_rx_bufs = 0;
|
924 | 002437cd | aliguori | n->promisc = 1; /* for compatibility */ |
925 | fbe78f4f | aliguori | |
926 | b6503ed9 | aliguori | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
927 | b6503ed9 | aliguori | |
928 | f21c0ed9 | aliguori | n->vlans = qemu_mallocz(MAX_VLAN >> 3);
|
929 | f21c0ed9 | aliguori | |
930 | 9d6271b8 | aliguori | register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
|
931 | fbe78f4f | aliguori | virtio_net_save, virtio_net_load, n); |
932 | 9bc6304c | Michael S. Tsirkin | n->vmstate = qemu_add_vm_change_state_handler(virtio_net_vmstate_change, n); |
933 | cf21e106 | Paul Brook | |
934 | 53c25cea | Paul Brook | return &n->vdev;
|
935 | cf21e106 | Paul Brook | } |
936 | 97b15621 | Gerd Hoffmann | |
937 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev)
|
938 | 97b15621 | Gerd Hoffmann | { |
939 | 97b15621 | Gerd Hoffmann | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); |
940 | 9bc6304c | Michael S. Tsirkin | qemu_del_vm_change_state_handler(n->vmstate); |
941 | 9bc6304c | Michael S. Tsirkin | |
942 | 9bc6304c | Michael S. Tsirkin | if (n->vhost_started) {
|
943 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); |
944 | 9bc6304c | Michael S. Tsirkin | } |
945 | 97b15621 | Gerd Hoffmann | |
946 | eb6b6c12 | Mark McLoughlin | qemu_purge_queued_packets(&n->nic->nc); |
947 | 97b15621 | Gerd Hoffmann | |
948 | 97b15621 | Gerd Hoffmann | unregister_savevm("virtio-net", n);
|
949 | 97b15621 | Gerd Hoffmann | |
950 | 97b15621 | Gerd Hoffmann | qemu_free(n->mac_table.macs); |
951 | 97b15621 | Gerd Hoffmann | qemu_free(n->vlans); |
952 | 97b15621 | Gerd Hoffmann | |
953 | 97b15621 | Gerd Hoffmann | qemu_del_timer(n->tx_timer); |
954 | 97b15621 | Gerd Hoffmann | qemu_free_timer(n->tx_timer); |
955 | 97b15621 | Gerd Hoffmann | |
956 | 97b15621 | Gerd Hoffmann | virtio_cleanup(&n->vdev); |
957 | eb6b6c12 | Mark McLoughlin | qemu_del_vlan_client(&n->nic->nc); |
958 | 97b15621 | Gerd Hoffmann | } |