root / hw / virtio-net.c @ a2236d48
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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 | fbe78f4f | aliguori | #include "qemu-timer.h" |
19 | fbe78f4f | aliguori | #include "virtio-net.h" |
20 | fbe78f4f | aliguori | |
21 | 0ce0e8f4 | Mark McLoughlin | #define VIRTIO_NET_VM_VERSION 11 |
22 | b6503ed9 | aliguori | |
23 | 4ffb17f5 | Alex Williamson | #define MAC_TABLE_ENTRIES 64 |
24 | f21c0ed9 | aliguori | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
25 | 9d6271b8 | aliguori | |
26 | fbe78f4f | aliguori | typedef struct VirtIONet |
27 | fbe78f4f | aliguori | { |
28 | fbe78f4f | aliguori | VirtIODevice vdev; |
29 | 79674068 | aliguori | uint8_t mac[ETH_ALEN]; |
30 | 554c97dd | aliguori | uint16_t status; |
31 | fbe78f4f | aliguori | VirtQueue *rx_vq; |
32 | fbe78f4f | aliguori | VirtQueue *tx_vq; |
33 | 3d11d36c | aliguori | VirtQueue *ctrl_vq; |
34 | eb6b6c12 | Mark McLoughlin | NICState *nic; |
35 | fbe78f4f | aliguori | QEMUTimer *tx_timer; |
36 | fbe78f4f | aliguori | int tx_timer_active;
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37 | 3a330134 | Mark McLoughlin | uint32_t has_vnet_hdr; |
38 | 0ce0e8f4 | Mark McLoughlin | uint8_t has_ufo; |
39 | 6243375f | Mark McLoughlin | struct {
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40 | 6243375f | Mark McLoughlin | VirtQueueElement elem; |
41 | 6243375f | Mark McLoughlin | ssize_t len; |
42 | 6243375f | Mark McLoughlin | } async_tx; |
43 | fbe78f4f | aliguori | int mergeable_rx_bufs;
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44 | f10c592e | Alex Williamson | uint8_t promisc; |
45 | f10c592e | Alex Williamson | uint8_t allmulti; |
46 | 015cb166 | Alex Williamson | uint8_t alluni; |
47 | 015cb166 | Alex Williamson | uint8_t nomulti; |
48 | 015cb166 | Alex Williamson | uint8_t nouni; |
49 | 015cb166 | Alex Williamson | uint8_t nobcast; |
50 | b6503ed9 | aliguori | struct {
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51 | b6503ed9 | aliguori | int in_use;
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52 | 2d9aba39 | Alex Williamson | int first_multi;
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53 | 8fd2a2f1 | Alex Williamson | uint8_t multi_overflow; |
54 | 8fd2a2f1 | Alex Williamson | uint8_t uni_overflow; |
55 | b6503ed9 | aliguori | uint8_t *macs; |
56 | b6503ed9 | aliguori | } mac_table; |
57 | f21c0ed9 | aliguori | uint32_t *vlans; |
58 | fbe78f4f | aliguori | } VirtIONet; |
59 | fbe78f4f | aliguori | |
60 | fbe78f4f | aliguori | /* TODO
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61 | fbe78f4f | aliguori | * - we could suppress RX interrupt if we were so inclined.
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62 | fbe78f4f | aliguori | */
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63 | fbe78f4f | aliguori | |
64 | fbe78f4f | aliguori | static VirtIONet *to_virtio_net(VirtIODevice *vdev)
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65 | fbe78f4f | aliguori | { |
66 | fbe78f4f | aliguori | return (VirtIONet *)vdev;
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67 | fbe78f4f | aliguori | } |
68 | fbe78f4f | aliguori | |
69 | 0f03eca6 | aliguori | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
70 | fbe78f4f | aliguori | { |
71 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
72 | fbe78f4f | aliguori | struct virtio_net_config netcfg;
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73 | fbe78f4f | aliguori | |
74 | 554c97dd | aliguori | netcfg.status = n->status; |
75 | 79674068 | aliguori | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
76 | fbe78f4f | aliguori | memcpy(config, &netcfg, sizeof(netcfg));
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77 | fbe78f4f | aliguori | } |
78 | fbe78f4f | aliguori | |
79 | 0f03eca6 | aliguori | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
80 | 0f03eca6 | aliguori | { |
81 | 0f03eca6 | aliguori | VirtIONet *n = to_virtio_net(vdev); |
82 | 0f03eca6 | aliguori | struct virtio_net_config netcfg;
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83 | 0f03eca6 | aliguori | |
84 | 0f03eca6 | aliguori | memcpy(&netcfg, config, sizeof(netcfg));
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85 | 0f03eca6 | aliguori | |
86 | 79674068 | aliguori | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
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87 | 79674068 | aliguori | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
88 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
89 | 0f03eca6 | aliguori | } |
90 | 0f03eca6 | aliguori | } |
91 | 0f03eca6 | aliguori | |
92 | eb6b6c12 | Mark McLoughlin | static void virtio_net_set_link_status(VLANClientState *nc) |
93 | 554c97dd | aliguori | { |
94 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
95 | 554c97dd | aliguori | uint16_t old_status = n->status; |
96 | 554c97dd | aliguori | |
97 | eb6b6c12 | Mark McLoughlin | if (nc->link_down)
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98 | 554c97dd | aliguori | n->status &= ~VIRTIO_NET_S_LINK_UP; |
99 | 554c97dd | aliguori | else
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100 | 554c97dd | aliguori | n->status |= VIRTIO_NET_S_LINK_UP; |
101 | 554c97dd | aliguori | |
102 | 554c97dd | aliguori | if (n->status != old_status)
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103 | 554c97dd | aliguori | virtio_notify_config(&n->vdev); |
104 | 554c97dd | aliguori | } |
105 | 554c97dd | aliguori | |
106 | 002437cd | aliguori | static void virtio_net_reset(VirtIODevice *vdev) |
107 | 002437cd | aliguori | { |
108 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
109 | 002437cd | aliguori | |
110 | 002437cd | aliguori | /* Reset back to compatibility mode */
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111 | 002437cd | aliguori | n->promisc = 1;
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112 | 002437cd | aliguori | n->allmulti = 0;
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113 | 015cb166 | Alex Williamson | n->alluni = 0;
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114 | 015cb166 | Alex Williamson | n->nomulti = 0;
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115 | 015cb166 | Alex Williamson | n->nouni = 0;
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116 | 015cb166 | Alex Williamson | n->nobcast = 0;
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117 | b6503ed9 | aliguori | |
118 | f21c0ed9 | aliguori | /* Flush any MAC and VLAN filter table state */
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119 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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120 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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121 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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122 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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123 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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124 | f21c0ed9 | aliguori | memset(n->vlans, 0, MAX_VLAN >> 3); |
125 | 002437cd | aliguori | } |
126 | 002437cd | aliguori | |
127 | 3a330134 | Mark McLoughlin | static int peer_has_vnet_hdr(VirtIONet *n) |
128 | 3a330134 | Mark McLoughlin | { |
129 | eb6b6c12 | Mark McLoughlin | if (!n->nic->nc.peer)
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130 | 3a330134 | Mark McLoughlin | return 0; |
131 | 3a330134 | Mark McLoughlin | |
132 | 665a3b07 | Mark McLoughlin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP)
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133 | 3a330134 | Mark McLoughlin | return 0; |
134 | 3a330134 | Mark McLoughlin | |
135 | eb6b6c12 | Mark McLoughlin | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
136 | 3a330134 | Mark McLoughlin | |
137 | 3a330134 | Mark McLoughlin | return n->has_vnet_hdr;
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138 | 3a330134 | Mark McLoughlin | } |
139 | 3a330134 | Mark McLoughlin | |
140 | 0ce0e8f4 | Mark McLoughlin | static int peer_has_ufo(VirtIONet *n) |
141 | 0ce0e8f4 | Mark McLoughlin | { |
142 | 0ce0e8f4 | Mark McLoughlin | if (!peer_has_vnet_hdr(n))
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143 | 0ce0e8f4 | Mark McLoughlin | return 0; |
144 | 0ce0e8f4 | Mark McLoughlin | |
145 | eb6b6c12 | Mark McLoughlin | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
146 | 0ce0e8f4 | Mark McLoughlin | |
147 | 0ce0e8f4 | Mark McLoughlin | return n->has_ufo;
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148 | 0ce0e8f4 | Mark McLoughlin | } |
149 | 0ce0e8f4 | Mark McLoughlin | |
150 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
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151 | fbe78f4f | aliguori | { |
152 | 3a330134 | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
153 | fbe78f4f | aliguori | |
154 | c9f79a3f | Michael S. Tsirkin | features |= (1 << VIRTIO_NET_F_MAC);
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155 | c9f79a3f | Michael S. Tsirkin | |
156 | 3a330134 | Mark McLoughlin | if (peer_has_vnet_hdr(n)) {
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157 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
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158 | 8172539d | Michael S. Tsirkin | } else {
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159 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_CSUM);
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160 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
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161 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
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162 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
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163 | 8172539d | Michael S. Tsirkin | |
164 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
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165 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
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166 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
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167 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
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168 | 8172539d | Michael S. Tsirkin | } |
169 | 3a330134 | Mark McLoughlin | |
170 | 8172539d | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
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171 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
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172 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
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173 | 3a330134 | Mark McLoughlin | } |
174 | 3a330134 | Mark McLoughlin | |
175 | fbe78f4f | aliguori | return features;
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176 | fbe78f4f | aliguori | } |
177 | fbe78f4f | aliguori | |
178 | 8eca6b1b | aliguori | static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
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179 | 8eca6b1b | aliguori | { |
180 | 8eca6b1b | aliguori | uint32_t features = 0;
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181 | 8eca6b1b | aliguori | |
182 | 8eca6b1b | aliguori | /* Linux kernel 2.6.25. It understood MAC (as everyone must),
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183 | 8eca6b1b | aliguori | * but also these: */
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184 | 8eca6b1b | aliguori | features |= (1 << VIRTIO_NET_F_MAC);
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185 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_CSUM);
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186 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO4);
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187 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO6);
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188 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_ECN);
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189 | 8eca6b1b | aliguori | |
190 | 8172539d | Michael S. Tsirkin | return features;
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191 | 8eca6b1b | aliguori | } |
192 | 8eca6b1b | aliguori | |
193 | fbe78f4f | aliguori | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
194 | fbe78f4f | aliguori | { |
195 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
196 | fbe78f4f | aliguori | |
197 | fbe78f4f | aliguori | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
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198 | f5436dd9 | Mark McLoughlin | |
199 | f5436dd9 | Mark McLoughlin | if (n->has_vnet_hdr) {
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200 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
201 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
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202 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
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203 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
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204 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_ECN) & 1,
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205 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_UFO) & 1);
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206 | f5436dd9 | Mark McLoughlin | } |
207 | fbe78f4f | aliguori | } |
208 | fbe78f4f | aliguori | |
209 | 002437cd | aliguori | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
210 | 002437cd | aliguori | VirtQueueElement *elem) |
211 | 002437cd | aliguori | { |
212 | 002437cd | aliguori | uint8_t on; |
213 | 002437cd | aliguori | |
214 | 002437cd | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { |
215 | 002437cd | aliguori | fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
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216 | 002437cd | aliguori | exit(1);
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217 | 002437cd | aliguori | } |
218 | 002437cd | aliguori | |
219 | 002437cd | aliguori | on = ldub_p(elem->out_sg[1].iov_base);
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220 | 002437cd | aliguori | |
221 | 002437cd | aliguori | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
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222 | 002437cd | aliguori | n->promisc = on; |
223 | 002437cd | aliguori | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) |
224 | 002437cd | aliguori | n->allmulti = on; |
225 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
226 | 015cb166 | Alex Williamson | n->alluni = on; |
227 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) |
228 | 015cb166 | Alex Williamson | n->nomulti = on; |
229 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) |
230 | 015cb166 | Alex Williamson | n->nouni = on; |
231 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) |
232 | 015cb166 | Alex Williamson | n->nobcast = on; |
233 | 002437cd | aliguori | else
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234 | 002437cd | aliguori | return VIRTIO_NET_ERR;
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235 | 002437cd | aliguori | |
236 | 002437cd | aliguori | return VIRTIO_NET_OK;
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237 | 002437cd | aliguori | } |
238 | 002437cd | aliguori | |
239 | b6503ed9 | aliguori | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
240 | b6503ed9 | aliguori | VirtQueueElement *elem) |
241 | b6503ed9 | aliguori | { |
242 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac mac_data;
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243 | b6503ed9 | aliguori | |
244 | b6503ed9 | aliguori | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || |
245 | b6503ed9 | aliguori | elem->out_sg[1].iov_len < sizeof(mac_data) || |
246 | b6503ed9 | aliguori | elem->out_sg[2].iov_len < sizeof(mac_data)) |
247 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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248 | b6503ed9 | aliguori | |
249 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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250 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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251 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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252 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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253 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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254 | b6503ed9 | aliguori | |
255 | b6503ed9 | aliguori | mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base);
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256 | b6503ed9 | aliguori | |
257 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
258 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
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259 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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260 | b6503ed9 | aliguori | |
261 | b6503ed9 | aliguori | if (mac_data.entries <= MAC_TABLE_ENTRIES) {
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262 | b6503ed9 | aliguori | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), |
263 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
264 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
265 | b6503ed9 | aliguori | } else {
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266 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 1;
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267 | b6503ed9 | aliguori | } |
268 | b6503ed9 | aliguori | |
269 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = n->mac_table.in_use; |
270 | 2d9aba39 | Alex Williamson | |
271 | b6503ed9 | aliguori | mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base);
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272 | b6503ed9 | aliguori | |
273 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
274 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
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275 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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276 | b6503ed9 | aliguori | |
277 | b6503ed9 | aliguori | if (mac_data.entries) {
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278 | b6503ed9 | aliguori | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
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279 | b6503ed9 | aliguori | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), |
280 | b6503ed9 | aliguori | elem->out_sg[2].iov_base + sizeof(mac_data), |
281 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
282 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
283 | 8fd2a2f1 | Alex Williamson | } else {
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284 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 1;
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285 | 8fd2a2f1 | Alex Williamson | } |
286 | b6503ed9 | aliguori | } |
287 | b6503ed9 | aliguori | |
288 | b6503ed9 | aliguori | return VIRTIO_NET_OK;
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289 | b6503ed9 | aliguori | } |
290 | b6503ed9 | aliguori | |
291 | f21c0ed9 | aliguori | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
292 | f21c0ed9 | aliguori | VirtQueueElement *elem) |
293 | f21c0ed9 | aliguori | { |
294 | f21c0ed9 | aliguori | uint16_t vid; |
295 | f21c0ed9 | aliguori | |
296 | f21c0ed9 | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { |
297 | f21c0ed9 | aliguori | fprintf(stderr, "virtio-net ctrl invalid vlan command\n");
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298 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
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299 | f21c0ed9 | aliguori | } |
300 | f21c0ed9 | aliguori | |
301 | f21c0ed9 | aliguori | vid = lduw_le_p(elem->out_sg[1].iov_base);
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302 | f21c0ed9 | aliguori | |
303 | f21c0ed9 | aliguori | if (vid >= MAX_VLAN)
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304 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
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305 | f21c0ed9 | aliguori | |
306 | f21c0ed9 | aliguori | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
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307 | f21c0ed9 | aliguori | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
308 | f21c0ed9 | aliguori | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
309 | f21c0ed9 | aliguori | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
310 | f21c0ed9 | aliguori | else
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311 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
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312 | f21c0ed9 | aliguori | |
313 | f21c0ed9 | aliguori | return VIRTIO_NET_OK;
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314 | f21c0ed9 | aliguori | } |
315 | f21c0ed9 | aliguori | |
316 | 3d11d36c | aliguori | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
317 | 3d11d36c | aliguori | { |
318 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
319 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr ctrl;
|
320 | 3d11d36c | aliguori | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
321 | 3d11d36c | aliguori | VirtQueueElement elem; |
322 | 3d11d36c | aliguori | |
323 | 3d11d36c | aliguori | while (virtqueue_pop(vq, &elem)) {
|
324 | 3d11d36c | aliguori | if ((elem.in_num < 1) || (elem.out_num < 1)) { |
325 | 3d11d36c | aliguori | fprintf(stderr, "virtio-net ctrl missing headers\n");
|
326 | 3d11d36c | aliguori | exit(1);
|
327 | 3d11d36c | aliguori | } |
328 | 3d11d36c | aliguori | |
329 | 3d11d36c | aliguori | if (elem.out_sg[0].iov_len < sizeof(ctrl) || |
330 | c6bb9a32 | aliguori | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
331 | 3d11d36c | aliguori | fprintf(stderr, "virtio-net ctrl header not in correct element\n");
|
332 | 3d11d36c | aliguori | exit(1);
|
333 | 3d11d36c | aliguori | } |
334 | 3d11d36c | aliguori | |
335 | 3d11d36c | aliguori | ctrl.class = ldub_p(elem.out_sg[0].iov_base);
|
336 | 3d11d36c | aliguori | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); |
337 | 3d11d36c | aliguori | |
338 | 002437cd | aliguori | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
|
339 | 002437cd | aliguori | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); |
340 | b6503ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
341 | b6503ed9 | aliguori | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); |
342 | f21c0ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
343 | f21c0ed9 | aliguori | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); |
344 | 002437cd | aliguori | |
345 | 3d11d36c | aliguori | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
|
346 | 3d11d36c | aliguori | |
347 | 3d11d36c | aliguori | virtqueue_push(vq, &elem, sizeof(status));
|
348 | 3d11d36c | aliguori | virtio_notify(vdev, vq); |
349 | 3d11d36c | aliguori | } |
350 | 3d11d36c | aliguori | } |
351 | 3d11d36c | aliguori | |
352 | fbe78f4f | aliguori | /* RX */
|
353 | fbe78f4f | aliguori | |
354 | fbe78f4f | aliguori | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
355 | fbe78f4f | aliguori | { |
356 | 8aeff62d | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
357 | 8aeff62d | Mark McLoughlin | |
358 | eb6b6c12 | Mark McLoughlin | qemu_flush_queued_packets(&n->nic->nc); |
359 | a61d1f67 | Glauber Costa | |
360 | a61d1f67 | Glauber Costa | /* We now have RX buffers, signal to the IO thread to break out of the
|
361 | a61d1f67 | Glauber Costa | * select to re-poll the tap file descriptor */
|
362 | a61d1f67 | Glauber Costa | qemu_notify_event(); |
363 | fbe78f4f | aliguori | } |
364 | fbe78f4f | aliguori | |
365 | eb6b6c12 | Mark McLoughlin | static int virtio_net_can_receive(VLANClientState *nc) |
366 | fbe78f4f | aliguori | { |
367 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
368 | cdd5cc12 | Mark McLoughlin | |
369 | fbe78f4f | aliguori | if (!virtio_queue_ready(n->rx_vq) ||
|
370 | fbe78f4f | aliguori | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
371 | fbe78f4f | aliguori | return 0; |
372 | fbe78f4f | aliguori | |
373 | cdd5cc12 | Mark McLoughlin | return 1; |
374 | cdd5cc12 | Mark McLoughlin | } |
375 | cdd5cc12 | Mark McLoughlin | |
376 | cdd5cc12 | Mark McLoughlin | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) |
377 | cdd5cc12 | Mark McLoughlin | { |
378 | fbe78f4f | aliguori | if (virtio_queue_empty(n->rx_vq) ||
|
379 | fbe78f4f | aliguori | (n->mergeable_rx_bufs && |
380 | fbe78f4f | aliguori | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
|
381 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 1);
|
382 | 06b12970 | Tom Lendacky | |
383 | 06b12970 | Tom Lendacky | /* To avoid a race condition where the guest has made some buffers
|
384 | 06b12970 | Tom Lendacky | * available after the above check but before notification was
|
385 | 06b12970 | Tom Lendacky | * enabled, check for available buffers again.
|
386 | 06b12970 | Tom Lendacky | */
|
387 | 06b12970 | Tom Lendacky | if (virtio_queue_empty(n->rx_vq) ||
|
388 | 06b12970 | Tom Lendacky | (n->mergeable_rx_bufs && |
389 | 06b12970 | Tom Lendacky | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0)))
|
390 | 06b12970 | Tom Lendacky | return 0; |
391 | fbe78f4f | aliguori | } |
392 | fbe78f4f | aliguori | |
393 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 0);
|
394 | fbe78f4f | aliguori | return 1; |
395 | fbe78f4f | aliguori | } |
396 | fbe78f4f | aliguori | |
397 | 1d41b0c1 | Anthony Liguori | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
398 | 1d41b0c1 | Anthony Liguori | * it never finds out that the packets don't have valid checksums. This
|
399 | 1d41b0c1 | Anthony Liguori | * causes dhclient to get upset. Fedora's carried a patch for ages to
|
400 | 1d41b0c1 | Anthony Liguori | * fix this with Xen but it hasn't appeared in an upstream release of
|
401 | 1d41b0c1 | Anthony Liguori | * dhclient yet.
|
402 | 1d41b0c1 | Anthony Liguori | *
|
403 | 1d41b0c1 | Anthony Liguori | * To avoid breaking existing guests, we catch udp packets and add
|
404 | 1d41b0c1 | Anthony Liguori | * checksums. This is terrible but it's better than hacking the guest
|
405 | 1d41b0c1 | Anthony Liguori | * kernels.
|
406 | 1d41b0c1 | Anthony Liguori | *
|
407 | 1d41b0c1 | Anthony Liguori | * N.B. if we introduce a zero-copy API, this operation is no longer free so
|
408 | 1d41b0c1 | Anthony Liguori | * we should provide a mechanism to disable it to avoid polluting the host
|
409 | 1d41b0c1 | Anthony Liguori | * cache.
|
410 | 1d41b0c1 | Anthony Liguori | */
|
411 | 1d41b0c1 | Anthony Liguori | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
412 | 1d41b0c1 | Anthony Liguori | const uint8_t *buf, size_t size)
|
413 | 1d41b0c1 | Anthony Liguori | { |
414 | 1d41b0c1 | Anthony Liguori | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
415 | 1d41b0c1 | Anthony Liguori | (size > 27 && size < 1500) && /* normal sized MTU */ |
416 | 1d41b0c1 | Anthony Liguori | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
417 | 1d41b0c1 | Anthony Liguori | (buf[23] == 17) && /* ip.protocol == UDP */ |
418 | 1d41b0c1 | Anthony Liguori | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
419 | 1d41b0c1 | Anthony Liguori | /* FIXME this cast is evil */
|
420 | 1d41b0c1 | Anthony Liguori | net_checksum_calculate((uint8_t *)buf, size); |
421 | 1d41b0c1 | Anthony Liguori | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
422 | 1d41b0c1 | Anthony Liguori | } |
423 | 1d41b0c1 | Anthony Liguori | } |
424 | 1d41b0c1 | Anthony Liguori | |
425 | fbe78f4f | aliguori | static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count) |
426 | fbe78f4f | aliguori | { |
427 | fbe78f4f | aliguori | int offset, i;
|
428 | fbe78f4f | aliguori | |
429 | fbe78f4f | aliguori | offset = i = 0;
|
430 | fbe78f4f | aliguori | while (offset < count && i < iovcnt) {
|
431 | fbe78f4f | aliguori | int len = MIN(iov[i].iov_len, count - offset);
|
432 | fbe78f4f | aliguori | memcpy(iov[i].iov_base, buf + offset, len); |
433 | fbe78f4f | aliguori | offset += len; |
434 | fbe78f4f | aliguori | i++; |
435 | fbe78f4f | aliguori | } |
436 | fbe78f4f | aliguori | |
437 | fbe78f4f | aliguori | return offset;
|
438 | fbe78f4f | aliguori | } |
439 | fbe78f4f | aliguori | |
440 | fbe78f4f | aliguori | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
441 | 4689f4b3 | aliguori | const void *buf, size_t size, size_t hdr_len) |
442 | fbe78f4f | aliguori | { |
443 | 3f4cb3d3 | blueswir1 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
444 | fbe78f4f | aliguori | int offset = 0; |
445 | fbe78f4f | aliguori | |
446 | fbe78f4f | aliguori | hdr->flags = 0;
|
447 | fbe78f4f | aliguori | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
448 | fbe78f4f | aliguori | |
449 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
450 | 3a330134 | Mark McLoughlin | memcpy(hdr, buf, sizeof(*hdr));
|
451 | 3a330134 | Mark McLoughlin | offset = sizeof(*hdr);
|
452 | 1d41b0c1 | Anthony Liguori | work_around_broken_dhclient(hdr, buf + offset, size - offset); |
453 | 3a330134 | Mark McLoughlin | } |
454 | 3a330134 | Mark McLoughlin | |
455 | fbe78f4f | aliguori | /* We only ever receive a struct virtio_net_hdr from the tapfd,
|
456 | fbe78f4f | aliguori | * but we may be passing along a larger header to the guest.
|
457 | fbe78f4f | aliguori | */
|
458 | fbe78f4f | aliguori | iov[0].iov_base += hdr_len;
|
459 | fbe78f4f | aliguori | iov[0].iov_len -= hdr_len;
|
460 | fbe78f4f | aliguori | |
461 | fbe78f4f | aliguori | return offset;
|
462 | fbe78f4f | aliguori | } |
463 | fbe78f4f | aliguori | |
464 | 3831ab20 | aliguori | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
465 | 3831ab20 | aliguori | { |
466 | 3831ab20 | aliguori | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
467 | f21c0ed9 | aliguori | static const uint8_t vlan[] = {0x81, 0x00}; |
468 | 3831ab20 | aliguori | uint8_t *ptr = (uint8_t *)buf; |
469 | b6503ed9 | aliguori | int i;
|
470 | 3831ab20 | aliguori | |
471 | 3831ab20 | aliguori | if (n->promisc)
|
472 | 3831ab20 | aliguori | return 1; |
473 | 3831ab20 | aliguori | |
474 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
475 | 3a330134 | Mark McLoughlin | ptr += sizeof(struct virtio_net_hdr); |
476 | 3a330134 | Mark McLoughlin | } |
477 | 3a330134 | Mark McLoughlin | |
478 | f21c0ed9 | aliguori | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
479 | f21c0ed9 | aliguori | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
480 | f21c0ed9 | aliguori | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
481 | f21c0ed9 | aliguori | return 0; |
482 | f21c0ed9 | aliguori | } |
483 | f21c0ed9 | aliguori | |
484 | bbe2f399 | Alex Williamson | if (ptr[0] & 1) { // multicast |
485 | bbe2f399 | Alex Williamson | if (!memcmp(ptr, bcast, sizeof(bcast))) { |
486 | 015cb166 | Alex Williamson | return !n->nobcast;
|
487 | 015cb166 | Alex Williamson | } else if (n->nomulti) { |
488 | 015cb166 | Alex Williamson | return 0; |
489 | 8fd2a2f1 | Alex Williamson | } else if (n->allmulti || n->mac_table.multi_overflow) { |
490 | bbe2f399 | Alex Williamson | return 1; |
491 | bbe2f399 | Alex Williamson | } |
492 | 2d9aba39 | Alex Williamson | |
493 | 2d9aba39 | Alex Williamson | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
494 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
495 | 2d9aba39 | Alex Williamson | return 1; |
496 | 2d9aba39 | Alex Williamson | } |
497 | 2d9aba39 | Alex Williamson | } |
498 | bbe2f399 | Alex Williamson | } else { // unicast |
499 | 015cb166 | Alex Williamson | if (n->nouni) {
|
500 | 015cb166 | Alex Williamson | return 0; |
501 | 015cb166 | Alex Williamson | } else if (n->alluni || n->mac_table.uni_overflow) { |
502 | 8fd2a2f1 | Alex Williamson | return 1; |
503 | 8fd2a2f1 | Alex Williamson | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
504 | bbe2f399 | Alex Williamson | return 1; |
505 | bbe2f399 | Alex Williamson | } |
506 | 3831ab20 | aliguori | |
507 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.first_multi; i++) { |
508 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
509 | 2d9aba39 | Alex Williamson | return 1; |
510 | 2d9aba39 | Alex Williamson | } |
511 | 2d9aba39 | Alex Williamson | } |
512 | b6503ed9 | aliguori | } |
513 | b6503ed9 | aliguori | |
514 | 3831ab20 | aliguori | return 0; |
515 | 3831ab20 | aliguori | } |
516 | 3831ab20 | aliguori | |
517 | eb6b6c12 | Mark McLoughlin | static ssize_t virtio_net_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
518 | fbe78f4f | aliguori | { |
519 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
520 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
521 | 4689f4b3 | aliguori | size_t hdr_len, offset, i; |
522 | fbe78f4f | aliguori | |
523 | eb6b6c12 | Mark McLoughlin | if (!virtio_net_can_receive(&n->nic->nc))
|
524 | cdd5cc12 | Mark McLoughlin | return -1; |
525 | cdd5cc12 | Mark McLoughlin | |
526 | cdd5cc12 | Mark McLoughlin | if (!virtio_net_has_buffers(n, size))
|
527 | 8aeff62d | Mark McLoughlin | return 0; |
528 | fbe78f4f | aliguori | |
529 | 3831ab20 | aliguori | if (!receive_filter(n, buf, size))
|
530 | 4f1c942b | Mark McLoughlin | return size;
|
531 | 3831ab20 | aliguori | |
532 | fbe78f4f | aliguori | /* hdr_len refers to the header we supply to the guest */
|
533 | fbe78f4f | aliguori | hdr_len = n->mergeable_rx_bufs ? |
534 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
535 | fbe78f4f | aliguori | |
536 | fbe78f4f | aliguori | offset = i = 0;
|
537 | fbe78f4f | aliguori | |
538 | fbe78f4f | aliguori | while (offset < size) {
|
539 | fbe78f4f | aliguori | VirtQueueElement elem; |
540 | fbe78f4f | aliguori | int len, total;
|
541 | fbe78f4f | aliguori | struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
542 | fbe78f4f | aliguori | |
543 | 22c253d9 | Amit Shah | total = 0;
|
544 | fbe78f4f | aliguori | |
545 | fbe78f4f | aliguori | if ((i != 0 && !n->mergeable_rx_bufs) || |
546 | fbe78f4f | aliguori | virtqueue_pop(n->rx_vq, &elem) == 0) {
|
547 | fbe78f4f | aliguori | if (i == 0) |
548 | 4f1c942b | Mark McLoughlin | return -1; |
549 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net truncating packet\n");
|
550 | fbe78f4f | aliguori | exit(1);
|
551 | fbe78f4f | aliguori | } |
552 | fbe78f4f | aliguori | |
553 | fbe78f4f | aliguori | if (elem.in_num < 1) { |
554 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net receive queue contains no in buffers\n");
|
555 | fbe78f4f | aliguori | exit(1);
|
556 | fbe78f4f | aliguori | } |
557 | fbe78f4f | aliguori | |
558 | fbe78f4f | aliguori | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { |
559 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net header not in first element\n");
|
560 | fbe78f4f | aliguori | exit(1);
|
561 | fbe78f4f | aliguori | } |
562 | fbe78f4f | aliguori | |
563 | fbe78f4f | aliguori | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
564 | fbe78f4f | aliguori | |
565 | fbe78f4f | aliguori | if (i == 0) { |
566 | fbe78f4f | aliguori | if (n->mergeable_rx_bufs)
|
567 | fbe78f4f | aliguori | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
568 | fbe78f4f | aliguori | |
569 | fbe78f4f | aliguori | offset += receive_header(n, sg, elem.in_num, |
570 | fbe78f4f | aliguori | buf + offset, size - offset, hdr_len); |
571 | fbe78f4f | aliguori | total += hdr_len; |
572 | fbe78f4f | aliguori | } |
573 | fbe78f4f | aliguori | |
574 | fbe78f4f | aliguori | /* copy in packet. ugh */
|
575 | fbe78f4f | aliguori | len = iov_fill(sg, elem.in_num, |
576 | fbe78f4f | aliguori | buf + offset, size - offset); |
577 | fbe78f4f | aliguori | total += len; |
578 | fbe78f4f | aliguori | |
579 | fbe78f4f | aliguori | /* signal other side */
|
580 | fbe78f4f | aliguori | virtqueue_fill(n->rx_vq, &elem, total, i++); |
581 | fbe78f4f | aliguori | |
582 | fbe78f4f | aliguori | offset += len; |
583 | fbe78f4f | aliguori | } |
584 | fbe78f4f | aliguori | |
585 | fbe78f4f | aliguori | if (mhdr)
|
586 | fbe78f4f | aliguori | mhdr->num_buffers = i; |
587 | fbe78f4f | aliguori | |
588 | fbe78f4f | aliguori | virtqueue_flush(n->rx_vq, i); |
589 | fbe78f4f | aliguori | virtio_notify(&n->vdev, n->rx_vq); |
590 | 4f1c942b | Mark McLoughlin | |
591 | 4f1c942b | Mark McLoughlin | return size;
|
592 | fbe78f4f | aliguori | } |
593 | fbe78f4f | aliguori | |
594 | 6243375f | Mark McLoughlin | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
595 | 6243375f | Mark McLoughlin | |
596 | eb6b6c12 | Mark McLoughlin | static void virtio_net_tx_complete(VLANClientState *nc, ssize_t len) |
597 | 6243375f | Mark McLoughlin | { |
598 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
599 | 6243375f | Mark McLoughlin | |
600 | 6243375f | Mark McLoughlin | virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); |
601 | 6243375f | Mark McLoughlin | virtio_notify(&n->vdev, n->tx_vq); |
602 | 6243375f | Mark McLoughlin | |
603 | 6243375f | Mark McLoughlin | n->async_tx.elem.out_num = n->async_tx.len = 0;
|
604 | 6243375f | Mark McLoughlin | |
605 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 1);
|
606 | 6243375f | Mark McLoughlin | virtio_net_flush_tx(n, n->tx_vq); |
607 | 6243375f | Mark McLoughlin | } |
608 | 6243375f | Mark McLoughlin | |
609 | fbe78f4f | aliguori | /* TX */
|
610 | fbe78f4f | aliguori | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
611 | fbe78f4f | aliguori | { |
612 | fbe78f4f | aliguori | VirtQueueElement elem; |
613 | fbe78f4f | aliguori | |
614 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
615 | fbe78f4f | aliguori | return;
|
616 | fbe78f4f | aliguori | |
617 | 6243375f | Mark McLoughlin | if (n->async_tx.elem.out_num) {
|
618 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
619 | 6243375f | Mark McLoughlin | return;
|
620 | 6243375f | Mark McLoughlin | } |
621 | 6243375f | Mark McLoughlin | |
622 | fbe78f4f | aliguori | while (virtqueue_pop(vq, &elem)) {
|
623 | 6243375f | Mark McLoughlin | ssize_t ret, len = 0;
|
624 | fbe78f4f | aliguori | unsigned int out_num = elem.out_num; |
625 | fbe78f4f | aliguori | struct iovec *out_sg = &elem.out_sg[0]; |
626 | fbe78f4f | aliguori | unsigned hdr_len;
|
627 | fbe78f4f | aliguori | |
628 | fbe78f4f | aliguori | /* hdr_len refers to the header received from the guest */
|
629 | fbe78f4f | aliguori | hdr_len = n->mergeable_rx_bufs ? |
630 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
631 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr); |
632 | fbe78f4f | aliguori | |
633 | fbe78f4f | aliguori | if (out_num < 1 || out_sg->iov_len != hdr_len) { |
634 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net header not in first element\n");
|
635 | fbe78f4f | aliguori | exit(1);
|
636 | fbe78f4f | aliguori | } |
637 | fbe78f4f | aliguori | |
638 | fbe78f4f | aliguori | /* ignore the header if GSO is not supported */
|
639 | 3a330134 | Mark McLoughlin | if (!n->has_vnet_hdr) {
|
640 | fbe78f4f | aliguori | out_num--; |
641 | fbe78f4f | aliguori | out_sg++; |
642 | fbe78f4f | aliguori | len += hdr_len; |
643 | fbe78f4f | aliguori | } else if (n->mergeable_rx_bufs) { |
644 | fbe78f4f | aliguori | /* tapfd expects a struct virtio_net_hdr */
|
645 | fbe78f4f | aliguori | hdr_len -= sizeof(struct virtio_net_hdr); |
646 | fbe78f4f | aliguori | out_sg->iov_len -= hdr_len; |
647 | fbe78f4f | aliguori | len += hdr_len; |
648 | fbe78f4f | aliguori | } |
649 | fbe78f4f | aliguori | |
650 | eb6b6c12 | Mark McLoughlin | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
651 | 6243375f | Mark McLoughlin | virtio_net_tx_complete); |
652 | 6243375f | Mark McLoughlin | if (ret == 0) { |
653 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
654 | 6243375f | Mark McLoughlin | n->async_tx.elem = elem; |
655 | 6243375f | Mark McLoughlin | n->async_tx.len = len; |
656 | 6243375f | Mark McLoughlin | return;
|
657 | 6243375f | Mark McLoughlin | } |
658 | 6243375f | Mark McLoughlin | |
659 | 6243375f | Mark McLoughlin | len += ret; |
660 | fbe78f4f | aliguori | |
661 | fbe78f4f | aliguori | virtqueue_push(vq, &elem, len); |
662 | fbe78f4f | aliguori | virtio_notify(&n->vdev, vq); |
663 | fbe78f4f | aliguori | } |
664 | fbe78f4f | aliguori | } |
665 | fbe78f4f | aliguori | |
666 | fbe78f4f | aliguori | static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) |
667 | fbe78f4f | aliguori | { |
668 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
669 | fbe78f4f | aliguori | |
670 | fbe78f4f | aliguori | if (n->tx_timer_active) {
|
671 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 1);
|
672 | fbe78f4f | aliguori | qemu_del_timer(n->tx_timer); |
673 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
674 | fbe78f4f | aliguori | virtio_net_flush_tx(n, vq); |
675 | fbe78f4f | aliguori | } else {
|
676 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
677 | fbe78f4f | aliguori | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
678 | fbe78f4f | aliguori | n->tx_timer_active = 1;
|
679 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 0);
|
680 | fbe78f4f | aliguori | } |
681 | fbe78f4f | aliguori | } |
682 | fbe78f4f | aliguori | |
683 | fbe78f4f | aliguori | static void virtio_net_tx_timer(void *opaque) |
684 | fbe78f4f | aliguori | { |
685 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
686 | fbe78f4f | aliguori | |
687 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
688 | fbe78f4f | aliguori | |
689 | fbe78f4f | aliguori | /* Just in case the driver is not ready on more */
|
690 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
691 | fbe78f4f | aliguori | return;
|
692 | fbe78f4f | aliguori | |
693 | fbe78f4f | aliguori | virtio_queue_set_notification(n->tx_vq, 1);
|
694 | fbe78f4f | aliguori | virtio_net_flush_tx(n, n->tx_vq); |
695 | fbe78f4f | aliguori | } |
696 | fbe78f4f | aliguori | |
697 | fbe78f4f | aliguori | static void virtio_net_save(QEMUFile *f, void *opaque) |
698 | fbe78f4f | aliguori | { |
699 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
700 | fbe78f4f | aliguori | |
701 | fbe78f4f | aliguori | virtio_save(&n->vdev, f); |
702 | fbe78f4f | aliguori | |
703 | 79674068 | aliguori | qemu_put_buffer(f, n->mac, ETH_ALEN); |
704 | fbe78f4f | aliguori | qemu_put_be32(f, n->tx_timer_active); |
705 | e46cb38f | aliguori | qemu_put_be32(f, n->mergeable_rx_bufs); |
706 | 9d6271b8 | aliguori | qemu_put_be16(f, n->status); |
707 | f10c592e | Alex Williamson | qemu_put_byte(f, n->promisc); |
708 | f10c592e | Alex Williamson | qemu_put_byte(f, n->allmulti); |
709 | b6503ed9 | aliguori | qemu_put_be32(f, n->mac_table.in_use); |
710 | b6503ed9 | aliguori | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
711 | f21c0ed9 | aliguori | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
712 | 3a330134 | Mark McLoughlin | qemu_put_be32(f, n->has_vnet_hdr); |
713 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.multi_overflow); |
714 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.uni_overflow); |
715 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->alluni); |
716 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nomulti); |
717 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nouni); |
718 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nobcast); |
719 | 0ce0e8f4 | Mark McLoughlin | qemu_put_byte(f, n->has_ufo); |
720 | fbe78f4f | aliguori | } |
721 | fbe78f4f | aliguori | |
722 | fbe78f4f | aliguori | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
723 | fbe78f4f | aliguori | { |
724 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
725 | 2d9aba39 | Alex Williamson | int i;
|
726 | fbe78f4f | aliguori | |
727 | 9d6271b8 | aliguori | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
728 | fbe78f4f | aliguori | return -EINVAL;
|
729 | fbe78f4f | aliguori | |
730 | fbe78f4f | aliguori | virtio_load(&n->vdev, f); |
731 | fbe78f4f | aliguori | |
732 | 79674068 | aliguori | qemu_get_buffer(f, n->mac, ETH_ALEN); |
733 | fbe78f4f | aliguori | n->tx_timer_active = qemu_get_be32(f); |
734 | e46cb38f | aliguori | n->mergeable_rx_bufs = qemu_get_be32(f); |
735 | fbe78f4f | aliguori | |
736 | 9d6271b8 | aliguori | if (version_id >= 3) |
737 | 9d6271b8 | aliguori | n->status = qemu_get_be16(f); |
738 | 9d6271b8 | aliguori | |
739 | 002437cd | aliguori | if (version_id >= 4) { |
740 | f10c592e | Alex Williamson | if (version_id < 8) { |
741 | f10c592e | Alex Williamson | n->promisc = qemu_get_be32(f); |
742 | f10c592e | Alex Williamson | n->allmulti = qemu_get_be32(f); |
743 | f10c592e | Alex Williamson | } else {
|
744 | f10c592e | Alex Williamson | n->promisc = qemu_get_byte(f); |
745 | f10c592e | Alex Williamson | n->allmulti = qemu_get_byte(f); |
746 | f10c592e | Alex Williamson | } |
747 | 002437cd | aliguori | } |
748 | 002437cd | aliguori | |
749 | b6503ed9 | aliguori | if (version_id >= 5) { |
750 | b6503ed9 | aliguori | n->mac_table.in_use = qemu_get_be32(f); |
751 | b6503ed9 | aliguori | /* MAC_TABLE_ENTRIES may be different from the saved image */
|
752 | b6503ed9 | aliguori | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
753 | b6503ed9 | aliguori | qemu_get_buffer(f, n->mac_table.macs, |
754 | b6503ed9 | aliguori | n->mac_table.in_use * ETH_ALEN); |
755 | b6503ed9 | aliguori | } else if (n->mac_table.in_use) { |
756 | b6503ed9 | aliguori | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); |
757 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
758 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
759 | b6503ed9 | aliguori | } |
760 | b6503ed9 | aliguori | } |
761 | b6503ed9 | aliguori | |
762 | f21c0ed9 | aliguori | if (version_id >= 6) |
763 | f21c0ed9 | aliguori | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
764 | f21c0ed9 | aliguori | |
765 | 3a330134 | Mark McLoughlin | if (version_id >= 7) { |
766 | 3a330134 | Mark McLoughlin | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
767 | 3a330134 | Mark McLoughlin | qemu_error("virtio-net: saved image requires vnet_hdr=on\n");
|
768 | 3a330134 | Mark McLoughlin | return -1; |
769 | 3a330134 | Mark McLoughlin | } |
770 | 3a330134 | Mark McLoughlin | |
771 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
772 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
|
773 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
774 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
775 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
776 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
777 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
778 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
779 | 3a330134 | Mark McLoughlin | } |
780 | 6c042c16 | Alex Williamson | } |
781 | 6c042c16 | Alex Williamson | |
782 | 8fd2a2f1 | Alex Williamson | if (version_id >= 9) { |
783 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = qemu_get_byte(f); |
784 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = qemu_get_byte(f); |
785 | 8fd2a2f1 | Alex Williamson | } |
786 | 8fd2a2f1 | Alex Williamson | |
787 | 015cb166 | Alex Williamson | if (version_id >= 10) { |
788 | 015cb166 | Alex Williamson | n->alluni = qemu_get_byte(f); |
789 | 015cb166 | Alex Williamson | n->nomulti = qemu_get_byte(f); |
790 | 015cb166 | Alex Williamson | n->nouni = qemu_get_byte(f); |
791 | 015cb166 | Alex Williamson | n->nobcast = qemu_get_byte(f); |
792 | 015cb166 | Alex Williamson | } |
793 | 015cb166 | Alex Williamson | |
794 | 0ce0e8f4 | Mark McLoughlin | if (version_id >= 11) { |
795 | 0ce0e8f4 | Mark McLoughlin | if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
796 | 0ce0e8f4 | Mark McLoughlin | qemu_error("virtio-net: saved image requires TUN_F_UFO support\n");
|
797 | 0ce0e8f4 | Mark McLoughlin | return -1; |
798 | 0ce0e8f4 | Mark McLoughlin | } |
799 | 0ce0e8f4 | Mark McLoughlin | } |
800 | 0ce0e8f4 | Mark McLoughlin | |
801 | 2d9aba39 | Alex Williamson | /* Find the first multicast entry in the saved MAC filter */
|
802 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.in_use; i++) { |
803 | 2d9aba39 | Alex Williamson | if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
804 | 2d9aba39 | Alex Williamson | break;
|
805 | 2d9aba39 | Alex Williamson | } |
806 | 2d9aba39 | Alex Williamson | } |
807 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = i; |
808 | 2d9aba39 | Alex Williamson | |
809 | fbe78f4f | aliguori | if (n->tx_timer_active) {
|
810 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
811 | fbe78f4f | aliguori | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
812 | fbe78f4f | aliguori | } |
813 | fbe78f4f | aliguori | |
814 | fbe78f4f | aliguori | return 0; |
815 | fbe78f4f | aliguori | } |
816 | fbe78f4f | aliguori | |
817 | eb6b6c12 | Mark McLoughlin | static void virtio_net_cleanup(VLANClientState *nc) |
818 | b946a153 | aliguori | { |
819 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
820 | b946a153 | aliguori | |
821 | eb6b6c12 | Mark McLoughlin | n->nic = NULL;
|
822 | b946a153 | aliguori | } |
823 | b946a153 | aliguori | |
824 | eb6b6c12 | Mark McLoughlin | static NetClientInfo net_virtio_info = {
|
825 | eb6b6c12 | Mark McLoughlin | .type = NET_CLIENT_TYPE_NIC, |
826 | eb6b6c12 | Mark McLoughlin | .size = sizeof(NICState),
|
827 | eb6b6c12 | Mark McLoughlin | .can_receive = virtio_net_can_receive, |
828 | eb6b6c12 | Mark McLoughlin | .receive = virtio_net_receive, |
829 | eb6b6c12 | Mark McLoughlin | .cleanup = virtio_net_cleanup, |
830 | eb6b6c12 | Mark McLoughlin | .link_status_changed = virtio_net_set_link_status, |
831 | eb6b6c12 | Mark McLoughlin | }; |
832 | eb6b6c12 | Mark McLoughlin | |
833 | 97b15621 | Gerd Hoffmann | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf) |
834 | fbe78f4f | aliguori | { |
835 | fbe78f4f | aliguori | VirtIONet *n; |
836 | fbe78f4f | aliguori | static int virtio_net_id; |
837 | fbe78f4f | aliguori | |
838 | 53c25cea | Paul Brook | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
|
839 | 53c25cea | Paul Brook | sizeof(struct virtio_net_config), |
840 | 53c25cea | Paul Brook | sizeof(VirtIONet));
|
841 | fbe78f4f | aliguori | |
842 | 0f03eca6 | aliguori | n->vdev.get_config = virtio_net_get_config; |
843 | 0f03eca6 | aliguori | n->vdev.set_config = virtio_net_set_config; |
844 | fbe78f4f | aliguori | n->vdev.get_features = virtio_net_get_features; |
845 | fbe78f4f | aliguori | n->vdev.set_features = virtio_net_set_features; |
846 | 8eca6b1b | aliguori | n->vdev.bad_features = virtio_net_bad_features; |
847 | 002437cd | aliguori | n->vdev.reset = virtio_net_reset; |
848 | fbe78f4f | aliguori | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
|
849 | fbe78f4f | aliguori | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
|
850 | 4ffb17f5 | Alex Williamson | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
|
851 | 97b15621 | Gerd Hoffmann | qemu_macaddr_default_if_unset(&conf->macaddr); |
852 | 3cbe04c4 | Mark McLoughlin | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
853 | 554c97dd | aliguori | n->status = VIRTIO_NET_S_LINK_UP; |
854 | fbe78f4f | aliguori | |
855 | eb6b6c12 | Mark McLoughlin | n->nic = qemu_new_nic(&net_virtio_info, conf, dev->info->name, dev->id, n); |
856 | eb6b6c12 | Mark McLoughlin | |
857 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); |
858 | 96d5e201 | aliguori | |
859 | fbe78f4f | aliguori | n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
860 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
861 | fbe78f4f | aliguori | n->mergeable_rx_bufs = 0;
|
862 | 002437cd | aliguori | n->promisc = 1; /* for compatibility */ |
863 | fbe78f4f | aliguori | |
864 | b6503ed9 | aliguori | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
865 | b6503ed9 | aliguori | |
866 | f21c0ed9 | aliguori | n->vlans = qemu_mallocz(MAX_VLAN >> 3);
|
867 | f21c0ed9 | aliguori | |
868 | 9d6271b8 | aliguori | register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
|
869 | fbe78f4f | aliguori | virtio_net_save, virtio_net_load, n); |
870 | cf21e106 | Paul Brook | |
871 | 53c25cea | Paul Brook | return &n->vdev;
|
872 | cf21e106 | Paul Brook | } |
873 | 97b15621 | Gerd Hoffmann | |
874 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev)
|
875 | 97b15621 | Gerd Hoffmann | { |
876 | 97b15621 | Gerd Hoffmann | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); |
877 | 97b15621 | Gerd Hoffmann | |
878 | eb6b6c12 | Mark McLoughlin | qemu_purge_queued_packets(&n->nic->nc); |
879 | 97b15621 | Gerd Hoffmann | |
880 | 97b15621 | Gerd Hoffmann | unregister_savevm("virtio-net", n);
|
881 | 97b15621 | Gerd Hoffmann | |
882 | 97b15621 | Gerd Hoffmann | qemu_free(n->mac_table.macs); |
883 | 97b15621 | Gerd Hoffmann | qemu_free(n->vlans); |
884 | 97b15621 | Gerd Hoffmann | |
885 | 97b15621 | Gerd Hoffmann | qemu_del_timer(n->tx_timer); |
886 | 97b15621 | Gerd Hoffmann | qemu_free_timer(n->tx_timer); |
887 | 97b15621 | Gerd Hoffmann | |
888 | 97b15621 | Gerd Hoffmann | virtio_cleanup(&n->vdev); |
889 | eb6b6c12 | Mark McLoughlin | qemu_del_vlan_client(&n->nic->nc); |
890 | 97b15621 | Gerd Hoffmann | } |