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1 | fbe78f4f | aliguori | /*
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2 | fbe78f4f | aliguori | * Virtio Network Device
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3 | fbe78f4f | aliguori | *
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4 | fbe78f4f | aliguori | * Copyright IBM, Corp. 2007
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5 | fbe78f4f | aliguori | *
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6 | fbe78f4f | aliguori | * Authors:
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7 | fbe78f4f | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | fbe78f4f | aliguori | *
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9 | fbe78f4f | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | fbe78f4f | aliguori | * the COPYING file in the top-level directory.
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11 | fbe78f4f | aliguori | *
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12 | fbe78f4f | aliguori | */
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13 | fbe78f4f | aliguori | |
14 | e4d5639d | Amit Shah | #include "iov.h" |
15 | fbe78f4f | aliguori | #include "virtio.h" |
16 | fbe78f4f | aliguori | #include "net.h" |
17 | 7200ac3c | Mark McLoughlin | #include "net/checksum.h" |
18 | a8ed73f7 | Mark McLoughlin | #include "net/tap.h" |
19 | 2f792016 | Markus Armbruster | #include "qemu-error.h" |
20 | fbe78f4f | aliguori | #include "qemu-timer.h" |
21 | fbe78f4f | aliguori | #include "virtio-net.h" |
22 | 9bc6304c | Michael S. Tsirkin | #include "vhost_net.h" |
23 | fbe78f4f | aliguori | |
24 | 0ce0e8f4 | Mark McLoughlin | #define VIRTIO_NET_VM_VERSION 11 |
25 | b6503ed9 | aliguori | |
26 | 4ffb17f5 | Alex Williamson | #define MAC_TABLE_ENTRIES 64 |
27 | f21c0ed9 | aliguori | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
28 | 9d6271b8 | aliguori | |
29 | fbe78f4f | aliguori | typedef struct VirtIONet |
30 | fbe78f4f | aliguori | { |
31 | fbe78f4f | aliguori | VirtIODevice vdev; |
32 | 79674068 | aliguori | uint8_t mac[ETH_ALEN]; |
33 | 554c97dd | aliguori | uint16_t status; |
34 | fbe78f4f | aliguori | VirtQueue *rx_vq; |
35 | fbe78f4f | aliguori | VirtQueue *tx_vq; |
36 | 3d11d36c | aliguori | VirtQueue *ctrl_vq; |
37 | eb6b6c12 | Mark McLoughlin | NICState *nic; |
38 | fbe78f4f | aliguori | QEMUTimer *tx_timer; |
39 | fbe78f4f | aliguori | int tx_timer_active;
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40 | 3a330134 | Mark McLoughlin | uint32_t has_vnet_hdr; |
41 | 0ce0e8f4 | Mark McLoughlin | uint8_t has_ufo; |
42 | 6243375f | Mark McLoughlin | struct {
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43 | 6243375f | Mark McLoughlin | VirtQueueElement elem; |
44 | 6243375f | Mark McLoughlin | ssize_t len; |
45 | 6243375f | Mark McLoughlin | } async_tx; |
46 | fbe78f4f | aliguori | int mergeable_rx_bufs;
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47 | f10c592e | Alex Williamson | uint8_t promisc; |
48 | f10c592e | Alex Williamson | uint8_t allmulti; |
49 | 015cb166 | Alex Williamson | uint8_t alluni; |
50 | 015cb166 | Alex Williamson | uint8_t nomulti; |
51 | 015cb166 | Alex Williamson | uint8_t nouni; |
52 | 015cb166 | Alex Williamson | uint8_t nobcast; |
53 | 9bc6304c | Michael S. Tsirkin | uint8_t vhost_started; |
54 | 9bc6304c | Michael S. Tsirkin | VMChangeStateEntry *vmstate; |
55 | b6503ed9 | aliguori | struct {
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56 | b6503ed9 | aliguori | int in_use;
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57 | 2d9aba39 | Alex Williamson | int first_multi;
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58 | 8fd2a2f1 | Alex Williamson | uint8_t multi_overflow; |
59 | 8fd2a2f1 | Alex Williamson | uint8_t uni_overflow; |
60 | b6503ed9 | aliguori | uint8_t *macs; |
61 | b6503ed9 | aliguori | } mac_table; |
62 | f21c0ed9 | aliguori | uint32_t *vlans; |
63 | fbe78f4f | aliguori | } VirtIONet; |
64 | fbe78f4f | aliguori | |
65 | fbe78f4f | aliguori | /* TODO
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66 | fbe78f4f | aliguori | * - we could suppress RX interrupt if we were so inclined.
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67 | fbe78f4f | aliguori | */
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68 | fbe78f4f | aliguori | |
69 | fbe78f4f | aliguori | static VirtIONet *to_virtio_net(VirtIODevice *vdev)
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70 | fbe78f4f | aliguori | { |
71 | fbe78f4f | aliguori | return (VirtIONet *)vdev;
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72 | fbe78f4f | aliguori | } |
73 | fbe78f4f | aliguori | |
74 | 0f03eca6 | aliguori | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
75 | fbe78f4f | aliguori | { |
76 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
77 | fbe78f4f | aliguori | struct virtio_net_config netcfg;
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78 | fbe78f4f | aliguori | |
79 | 554c97dd | aliguori | netcfg.status = n->status; |
80 | 79674068 | aliguori | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
81 | fbe78f4f | aliguori | memcpy(config, &netcfg, sizeof(netcfg));
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82 | fbe78f4f | aliguori | } |
83 | fbe78f4f | aliguori | |
84 | 0f03eca6 | aliguori | static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) |
85 | 0f03eca6 | aliguori | { |
86 | 0f03eca6 | aliguori | VirtIONet *n = to_virtio_net(vdev); |
87 | 0f03eca6 | aliguori | struct virtio_net_config netcfg;
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88 | 0f03eca6 | aliguori | |
89 | 0f03eca6 | aliguori | memcpy(&netcfg, config, sizeof(netcfg));
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90 | 0f03eca6 | aliguori | |
91 | 79674068 | aliguori | if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
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92 | 79674068 | aliguori | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
93 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, n->mac); |
94 | 0f03eca6 | aliguori | } |
95 | 0f03eca6 | aliguori | } |
96 | 0f03eca6 | aliguori | |
97 | eb6b6c12 | Mark McLoughlin | static void virtio_net_set_link_status(VLANClientState *nc) |
98 | 554c97dd | aliguori | { |
99 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
100 | 554c97dd | aliguori | uint16_t old_status = n->status; |
101 | 554c97dd | aliguori | |
102 | eb6b6c12 | Mark McLoughlin | if (nc->link_down)
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103 | 554c97dd | aliguori | n->status &= ~VIRTIO_NET_S_LINK_UP; |
104 | 554c97dd | aliguori | else
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105 | 554c97dd | aliguori | n->status |= VIRTIO_NET_S_LINK_UP; |
106 | 554c97dd | aliguori | |
107 | 554c97dd | aliguori | if (n->status != old_status)
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108 | 554c97dd | aliguori | virtio_notify_config(&n->vdev); |
109 | 554c97dd | aliguori | } |
110 | 554c97dd | aliguori | |
111 | 002437cd | aliguori | static void virtio_net_reset(VirtIODevice *vdev) |
112 | 002437cd | aliguori | { |
113 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
114 | 002437cd | aliguori | |
115 | 002437cd | aliguori | /* Reset back to compatibility mode */
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116 | 002437cd | aliguori | n->promisc = 1;
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117 | 002437cd | aliguori | n->allmulti = 0;
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118 | 015cb166 | Alex Williamson | n->alluni = 0;
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119 | 015cb166 | Alex Williamson | n->nomulti = 0;
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120 | 015cb166 | Alex Williamson | n->nouni = 0;
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121 | 015cb166 | Alex Williamson | n->nobcast = 0;
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122 | 9bc6304c | Michael S. Tsirkin | if (n->vhost_started) {
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123 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); |
124 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 0;
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125 | 9bc6304c | Michael S. Tsirkin | } |
126 | b6503ed9 | aliguori | |
127 | f21c0ed9 | aliguori | /* Flush any MAC and VLAN filter table state */
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128 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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129 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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130 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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131 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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132 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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133 | f21c0ed9 | aliguori | memset(n->vlans, 0, MAX_VLAN >> 3); |
134 | 002437cd | aliguori | } |
135 | 002437cd | aliguori | |
136 | 3a330134 | Mark McLoughlin | static int peer_has_vnet_hdr(VirtIONet *n) |
137 | 3a330134 | Mark McLoughlin | { |
138 | eb6b6c12 | Mark McLoughlin | if (!n->nic->nc.peer)
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139 | 3a330134 | Mark McLoughlin | return 0; |
140 | 3a330134 | Mark McLoughlin | |
141 | 665a3b07 | Mark McLoughlin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP)
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142 | 3a330134 | Mark McLoughlin | return 0; |
143 | 3a330134 | Mark McLoughlin | |
144 | eb6b6c12 | Mark McLoughlin | n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer); |
145 | 3a330134 | Mark McLoughlin | |
146 | 3a330134 | Mark McLoughlin | return n->has_vnet_hdr;
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147 | 3a330134 | Mark McLoughlin | } |
148 | 3a330134 | Mark McLoughlin | |
149 | 0ce0e8f4 | Mark McLoughlin | static int peer_has_ufo(VirtIONet *n) |
150 | 0ce0e8f4 | Mark McLoughlin | { |
151 | 0ce0e8f4 | Mark McLoughlin | if (!peer_has_vnet_hdr(n))
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152 | 0ce0e8f4 | Mark McLoughlin | return 0; |
153 | 0ce0e8f4 | Mark McLoughlin | |
154 | eb6b6c12 | Mark McLoughlin | n->has_ufo = tap_has_ufo(n->nic->nc.peer); |
155 | 0ce0e8f4 | Mark McLoughlin | |
156 | 0ce0e8f4 | Mark McLoughlin | return n->has_ufo;
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157 | 0ce0e8f4 | Mark McLoughlin | } |
158 | 0ce0e8f4 | Mark McLoughlin | |
159 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
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160 | fbe78f4f | aliguori | { |
161 | 3a330134 | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
162 | fbe78f4f | aliguori | |
163 | c9f79a3f | Michael S. Tsirkin | features |= (1 << VIRTIO_NET_F_MAC);
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164 | c9f79a3f | Michael S. Tsirkin | |
165 | 3a330134 | Mark McLoughlin | if (peer_has_vnet_hdr(n)) {
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166 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
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167 | 8172539d | Michael S. Tsirkin | } else {
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168 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_CSUM);
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169 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
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170 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
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171 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
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172 | 8172539d | Michael S. Tsirkin | |
173 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
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174 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
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175 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
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176 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
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177 | 8172539d | Michael S. Tsirkin | } |
178 | 3a330134 | Mark McLoughlin | |
179 | 8172539d | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
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180 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
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181 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
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182 | 3a330134 | Mark McLoughlin | } |
183 | 3a330134 | Mark McLoughlin | |
184 | 9bc6304c | Michael S. Tsirkin | if (!n->nic->nc.peer ||
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185 | 9bc6304c | Michael S. Tsirkin | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
186 | 9bc6304c | Michael S. Tsirkin | return features;
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187 | 9bc6304c | Michael S. Tsirkin | } |
188 | 9bc6304c | Michael S. Tsirkin | if (!tap_get_vhost_net(n->nic->nc.peer)) {
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189 | 9bc6304c | Michael S. Tsirkin | return features;
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190 | 9bc6304c | Michael S. Tsirkin | } |
191 | 9bc6304c | Michael S. Tsirkin | return vhost_net_get_features(tap_get_vhost_net(n->nic->nc.peer), features);
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192 | fbe78f4f | aliguori | } |
193 | fbe78f4f | aliguori | |
194 | 8eca6b1b | aliguori | static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
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195 | 8eca6b1b | aliguori | { |
196 | 8eca6b1b | aliguori | uint32_t features = 0;
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197 | 8eca6b1b | aliguori | |
198 | 8eca6b1b | aliguori | /* Linux kernel 2.6.25. It understood MAC (as everyone must),
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199 | 8eca6b1b | aliguori | * but also these: */
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200 | 8eca6b1b | aliguori | features |= (1 << VIRTIO_NET_F_MAC);
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201 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_CSUM);
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202 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO4);
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203 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO6);
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204 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_ECN);
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205 | 8eca6b1b | aliguori | |
206 | 8172539d | Michael S. Tsirkin | return features;
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207 | 8eca6b1b | aliguori | } |
208 | 8eca6b1b | aliguori | |
209 | fbe78f4f | aliguori | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
210 | fbe78f4f | aliguori | { |
211 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
212 | fbe78f4f | aliguori | |
213 | fbe78f4f | aliguori | n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
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214 | f5436dd9 | Mark McLoughlin | |
215 | f5436dd9 | Mark McLoughlin | if (n->has_vnet_hdr) {
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216 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
217 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
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218 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
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219 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
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220 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_ECN) & 1,
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221 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_UFO) & 1);
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222 | f5436dd9 | Mark McLoughlin | } |
223 | dc14a397 | David L Stevens | if (!n->nic->nc.peer ||
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224 | dc14a397 | David L Stevens | n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) { |
225 | dc14a397 | David L Stevens | return;
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226 | dc14a397 | David L Stevens | } |
227 | dc14a397 | David L Stevens | if (!tap_get_vhost_net(n->nic->nc.peer)) {
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228 | dc14a397 | David L Stevens | return;
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229 | dc14a397 | David L Stevens | } |
230 | 57c3229b | Michael S. Tsirkin | vhost_net_ack_features(tap_get_vhost_net(n->nic->nc.peer), features); |
231 | fbe78f4f | aliguori | } |
232 | fbe78f4f | aliguori | |
233 | 002437cd | aliguori | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
234 | 002437cd | aliguori | VirtQueueElement *elem) |
235 | 002437cd | aliguori | { |
236 | 002437cd | aliguori | uint8_t on; |
237 | 002437cd | aliguori | |
238 | 002437cd | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) { |
239 | 002437cd | aliguori | fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
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240 | 002437cd | aliguori | exit(1);
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241 | 002437cd | aliguori | } |
242 | 002437cd | aliguori | |
243 | 002437cd | aliguori | on = ldub_p(elem->out_sg[1].iov_base);
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244 | 002437cd | aliguori | |
245 | 002437cd | aliguori | if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
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246 | 002437cd | aliguori | n->promisc = on; |
247 | 002437cd | aliguori | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI) |
248 | 002437cd | aliguori | n->allmulti = on; |
249 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
250 | 015cb166 | Alex Williamson | n->alluni = on; |
251 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) |
252 | 015cb166 | Alex Williamson | n->nomulti = on; |
253 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) |
254 | 015cb166 | Alex Williamson | n->nouni = on; |
255 | 015cb166 | Alex Williamson | else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) |
256 | 015cb166 | Alex Williamson | n->nobcast = on; |
257 | 002437cd | aliguori | else
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258 | 002437cd | aliguori | return VIRTIO_NET_ERR;
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259 | 002437cd | aliguori | |
260 | 002437cd | aliguori | return VIRTIO_NET_OK;
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261 | 002437cd | aliguori | } |
262 | 002437cd | aliguori | |
263 | b6503ed9 | aliguori | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
264 | b6503ed9 | aliguori | VirtQueueElement *elem) |
265 | b6503ed9 | aliguori | { |
266 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac mac_data;
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267 | b6503ed9 | aliguori | |
268 | b6503ed9 | aliguori | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 || |
269 | b6503ed9 | aliguori | elem->out_sg[1].iov_len < sizeof(mac_data) || |
270 | b6503ed9 | aliguori | elem->out_sg[2].iov_len < sizeof(mac_data)) |
271 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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272 | b6503ed9 | aliguori | |
273 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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274 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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275 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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276 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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277 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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278 | b6503ed9 | aliguori | |
279 | b6503ed9 | aliguori | mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base);
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280 | b6503ed9 | aliguori | |
281 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
282 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
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283 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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284 | b6503ed9 | aliguori | |
285 | b6503ed9 | aliguori | if (mac_data.entries <= MAC_TABLE_ENTRIES) {
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286 | b6503ed9 | aliguori | memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data), |
287 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
288 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
289 | b6503ed9 | aliguori | } else {
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290 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 1;
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291 | b6503ed9 | aliguori | } |
292 | b6503ed9 | aliguori | |
293 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = n->mac_table.in_use; |
294 | 2d9aba39 | Alex Williamson | |
295 | b6503ed9 | aliguori | mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base);
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296 | b6503ed9 | aliguori | |
297 | b6503ed9 | aliguori | if (sizeof(mac_data.entries) + |
298 | b6503ed9 | aliguori | (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
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299 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
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300 | b6503ed9 | aliguori | |
301 | b6503ed9 | aliguori | if (mac_data.entries) {
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302 | b6503ed9 | aliguori | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
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303 | b6503ed9 | aliguori | memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN), |
304 | b6503ed9 | aliguori | elem->out_sg[2].iov_base + sizeof(mac_data), |
305 | b6503ed9 | aliguori | mac_data.entries * ETH_ALEN); |
306 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
307 | 8fd2a2f1 | Alex Williamson | } else {
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308 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 1;
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309 | 8fd2a2f1 | Alex Williamson | } |
310 | b6503ed9 | aliguori | } |
311 | b6503ed9 | aliguori | |
312 | b6503ed9 | aliguori | return VIRTIO_NET_OK;
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313 | b6503ed9 | aliguori | } |
314 | b6503ed9 | aliguori | |
315 | f21c0ed9 | aliguori | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
316 | f21c0ed9 | aliguori | VirtQueueElement *elem) |
317 | f21c0ed9 | aliguori | { |
318 | f21c0ed9 | aliguori | uint16_t vid; |
319 | f21c0ed9 | aliguori | |
320 | f21c0ed9 | aliguori | if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) { |
321 | f21c0ed9 | aliguori | fprintf(stderr, "virtio-net ctrl invalid vlan command\n");
|
322 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
323 | f21c0ed9 | aliguori | } |
324 | f21c0ed9 | aliguori | |
325 | f21c0ed9 | aliguori | vid = lduw_le_p(elem->out_sg[1].iov_base);
|
326 | f21c0ed9 | aliguori | |
327 | f21c0ed9 | aliguori | if (vid >= MAX_VLAN)
|
328 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
329 | f21c0ed9 | aliguori | |
330 | f21c0ed9 | aliguori | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
331 | f21c0ed9 | aliguori | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
332 | f21c0ed9 | aliguori | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
333 | f21c0ed9 | aliguori | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
334 | f21c0ed9 | aliguori | else
|
335 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
336 | f21c0ed9 | aliguori | |
337 | f21c0ed9 | aliguori | return VIRTIO_NET_OK;
|
338 | f21c0ed9 | aliguori | } |
339 | f21c0ed9 | aliguori | |
340 | 3d11d36c | aliguori | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
341 | 3d11d36c | aliguori | { |
342 | 002437cd | aliguori | VirtIONet *n = to_virtio_net(vdev); |
343 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr ctrl;
|
344 | 3d11d36c | aliguori | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
345 | 3d11d36c | aliguori | VirtQueueElement elem; |
346 | 3d11d36c | aliguori | |
347 | 3d11d36c | aliguori | while (virtqueue_pop(vq, &elem)) {
|
348 | 3d11d36c | aliguori | if ((elem.in_num < 1) || (elem.out_num < 1)) { |
349 | 3d11d36c | aliguori | fprintf(stderr, "virtio-net ctrl missing headers\n");
|
350 | 3d11d36c | aliguori | exit(1);
|
351 | 3d11d36c | aliguori | } |
352 | 3d11d36c | aliguori | |
353 | 3d11d36c | aliguori | if (elem.out_sg[0].iov_len < sizeof(ctrl) || |
354 | c6bb9a32 | aliguori | elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) { |
355 | 3d11d36c | aliguori | fprintf(stderr, "virtio-net ctrl header not in correct element\n");
|
356 | 3d11d36c | aliguori | exit(1);
|
357 | 3d11d36c | aliguori | } |
358 | 3d11d36c | aliguori | |
359 | 3d11d36c | aliguori | ctrl.class = ldub_p(elem.out_sg[0].iov_base);
|
360 | 3d11d36c | aliguori | ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class)); |
361 | 3d11d36c | aliguori | |
362 | 002437cd | aliguori | if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
|
363 | 002437cd | aliguori | status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem); |
364 | b6503ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_MAC) |
365 | b6503ed9 | aliguori | status = virtio_net_handle_mac(n, ctrl.cmd, &elem); |
366 | f21c0ed9 | aliguori | else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) |
367 | f21c0ed9 | aliguori | status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem); |
368 | 002437cd | aliguori | |
369 | 3d11d36c | aliguori | stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
|
370 | 3d11d36c | aliguori | |
371 | 3d11d36c | aliguori | virtqueue_push(vq, &elem, sizeof(status));
|
372 | 3d11d36c | aliguori | virtio_notify(vdev, vq); |
373 | 3d11d36c | aliguori | } |
374 | 3d11d36c | aliguori | } |
375 | 3d11d36c | aliguori | |
376 | fbe78f4f | aliguori | /* RX */
|
377 | fbe78f4f | aliguori | |
378 | fbe78f4f | aliguori | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
379 | fbe78f4f | aliguori | { |
380 | 8aeff62d | Mark McLoughlin | VirtIONet *n = to_virtio_net(vdev); |
381 | 8aeff62d | Mark McLoughlin | |
382 | eb6b6c12 | Mark McLoughlin | qemu_flush_queued_packets(&n->nic->nc); |
383 | a61d1f67 | Glauber Costa | |
384 | a61d1f67 | Glauber Costa | /* We now have RX buffers, signal to the IO thread to break out of the
|
385 | a61d1f67 | Glauber Costa | * select to re-poll the tap file descriptor */
|
386 | a61d1f67 | Glauber Costa | qemu_notify_event(); |
387 | fbe78f4f | aliguori | } |
388 | fbe78f4f | aliguori | |
389 | eb6b6c12 | Mark McLoughlin | static int virtio_net_can_receive(VLANClientState *nc) |
390 | fbe78f4f | aliguori | { |
391 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
392 | cdd5cc12 | Mark McLoughlin | |
393 | fbe78f4f | aliguori | if (!virtio_queue_ready(n->rx_vq) ||
|
394 | fbe78f4f | aliguori | !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
395 | fbe78f4f | aliguori | return 0; |
396 | fbe78f4f | aliguori | |
397 | cdd5cc12 | Mark McLoughlin | return 1; |
398 | cdd5cc12 | Mark McLoughlin | } |
399 | cdd5cc12 | Mark McLoughlin | |
400 | cdd5cc12 | Mark McLoughlin | static int virtio_net_has_buffers(VirtIONet *n, int bufsize) |
401 | cdd5cc12 | Mark McLoughlin | { |
402 | fbe78f4f | aliguori | if (virtio_queue_empty(n->rx_vq) ||
|
403 | fbe78f4f | aliguori | (n->mergeable_rx_bufs && |
404 | fbe78f4f | aliguori | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) {
|
405 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 1);
|
406 | 06b12970 | Tom Lendacky | |
407 | 06b12970 | Tom Lendacky | /* To avoid a race condition where the guest has made some buffers
|
408 | 06b12970 | Tom Lendacky | * available after the above check but before notification was
|
409 | 06b12970 | Tom Lendacky | * enabled, check for available buffers again.
|
410 | 06b12970 | Tom Lendacky | */
|
411 | 06b12970 | Tom Lendacky | if (virtio_queue_empty(n->rx_vq) ||
|
412 | 06b12970 | Tom Lendacky | (n->mergeable_rx_bufs && |
413 | 06b12970 | Tom Lendacky | !virtqueue_avail_bytes(n->rx_vq, bufsize, 0)))
|
414 | 06b12970 | Tom Lendacky | return 0; |
415 | fbe78f4f | aliguori | } |
416 | fbe78f4f | aliguori | |
417 | fbe78f4f | aliguori | virtio_queue_set_notification(n->rx_vq, 0);
|
418 | fbe78f4f | aliguori | return 1; |
419 | fbe78f4f | aliguori | } |
420 | fbe78f4f | aliguori | |
421 | 1d41b0c1 | Anthony Liguori | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
422 | 1d41b0c1 | Anthony Liguori | * it never finds out that the packets don't have valid checksums. This
|
423 | 1d41b0c1 | Anthony Liguori | * causes dhclient to get upset. Fedora's carried a patch for ages to
|
424 | 1d41b0c1 | Anthony Liguori | * fix this with Xen but it hasn't appeared in an upstream release of
|
425 | 1d41b0c1 | Anthony Liguori | * dhclient yet.
|
426 | 1d41b0c1 | Anthony Liguori | *
|
427 | 1d41b0c1 | Anthony Liguori | * To avoid breaking existing guests, we catch udp packets and add
|
428 | 1d41b0c1 | Anthony Liguori | * checksums. This is terrible but it's better than hacking the guest
|
429 | 1d41b0c1 | Anthony Liguori | * kernels.
|
430 | 1d41b0c1 | Anthony Liguori | *
|
431 | 1d41b0c1 | Anthony Liguori | * N.B. if we introduce a zero-copy API, this operation is no longer free so
|
432 | 1d41b0c1 | Anthony Liguori | * we should provide a mechanism to disable it to avoid polluting the host
|
433 | 1d41b0c1 | Anthony Liguori | * cache.
|
434 | 1d41b0c1 | Anthony Liguori | */
|
435 | 1d41b0c1 | Anthony Liguori | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
436 | 1d41b0c1 | Anthony Liguori | const uint8_t *buf, size_t size)
|
437 | 1d41b0c1 | Anthony Liguori | { |
438 | 1d41b0c1 | Anthony Liguori | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
439 | 1d41b0c1 | Anthony Liguori | (size > 27 && size < 1500) && /* normal sized MTU */ |
440 | 1d41b0c1 | Anthony Liguori | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
441 | 1d41b0c1 | Anthony Liguori | (buf[23] == 17) && /* ip.protocol == UDP */ |
442 | 1d41b0c1 | Anthony Liguori | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
443 | 1d41b0c1 | Anthony Liguori | /* FIXME this cast is evil */
|
444 | 1d41b0c1 | Anthony Liguori | net_checksum_calculate((uint8_t *)buf, size); |
445 | 1d41b0c1 | Anthony Liguori | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
446 | 1d41b0c1 | Anthony Liguori | } |
447 | 1d41b0c1 | Anthony Liguori | } |
448 | 1d41b0c1 | Anthony Liguori | |
449 | fbe78f4f | aliguori | static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, |
450 | 4689f4b3 | aliguori | const void *buf, size_t size, size_t hdr_len) |
451 | fbe78f4f | aliguori | { |
452 | 3f4cb3d3 | blueswir1 | struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base; |
453 | fbe78f4f | aliguori | int offset = 0; |
454 | fbe78f4f | aliguori | |
455 | fbe78f4f | aliguori | hdr->flags = 0;
|
456 | fbe78f4f | aliguori | hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
457 | fbe78f4f | aliguori | |
458 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
459 | 3a330134 | Mark McLoughlin | memcpy(hdr, buf, sizeof(*hdr));
|
460 | 3a330134 | Mark McLoughlin | offset = sizeof(*hdr);
|
461 | 1d41b0c1 | Anthony Liguori | work_around_broken_dhclient(hdr, buf + offset, size - offset); |
462 | 3a330134 | Mark McLoughlin | } |
463 | 3a330134 | Mark McLoughlin | |
464 | fbe78f4f | aliguori | /* We only ever receive a struct virtio_net_hdr from the tapfd,
|
465 | fbe78f4f | aliguori | * but we may be passing along a larger header to the guest.
|
466 | fbe78f4f | aliguori | */
|
467 | fbe78f4f | aliguori | iov[0].iov_base += hdr_len;
|
468 | fbe78f4f | aliguori | iov[0].iov_len -= hdr_len;
|
469 | fbe78f4f | aliguori | |
470 | fbe78f4f | aliguori | return offset;
|
471 | fbe78f4f | aliguori | } |
472 | fbe78f4f | aliguori | |
473 | 3831ab20 | aliguori | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
474 | 3831ab20 | aliguori | { |
475 | 3831ab20 | aliguori | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
476 | f21c0ed9 | aliguori | static const uint8_t vlan[] = {0x81, 0x00}; |
477 | 3831ab20 | aliguori | uint8_t *ptr = (uint8_t *)buf; |
478 | b6503ed9 | aliguori | int i;
|
479 | 3831ab20 | aliguori | |
480 | 3831ab20 | aliguori | if (n->promisc)
|
481 | 3831ab20 | aliguori | return 1; |
482 | 3831ab20 | aliguori | |
483 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
484 | 3a330134 | Mark McLoughlin | ptr += sizeof(struct virtio_net_hdr); |
485 | 3a330134 | Mark McLoughlin | } |
486 | 3a330134 | Mark McLoughlin | |
487 | f21c0ed9 | aliguori | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
488 | f21c0ed9 | aliguori | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
489 | f21c0ed9 | aliguori | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
490 | f21c0ed9 | aliguori | return 0; |
491 | f21c0ed9 | aliguori | } |
492 | f21c0ed9 | aliguori | |
493 | bbe2f399 | Alex Williamson | if (ptr[0] & 1) { // multicast |
494 | bbe2f399 | Alex Williamson | if (!memcmp(ptr, bcast, sizeof(bcast))) { |
495 | 015cb166 | Alex Williamson | return !n->nobcast;
|
496 | 015cb166 | Alex Williamson | } else if (n->nomulti) { |
497 | 015cb166 | Alex Williamson | return 0; |
498 | 8fd2a2f1 | Alex Williamson | } else if (n->allmulti || n->mac_table.multi_overflow) { |
499 | bbe2f399 | Alex Williamson | return 1; |
500 | bbe2f399 | Alex Williamson | } |
501 | 2d9aba39 | Alex Williamson | |
502 | 2d9aba39 | Alex Williamson | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
503 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
504 | 2d9aba39 | Alex Williamson | return 1; |
505 | 2d9aba39 | Alex Williamson | } |
506 | 2d9aba39 | Alex Williamson | } |
507 | bbe2f399 | Alex Williamson | } else { // unicast |
508 | 015cb166 | Alex Williamson | if (n->nouni) {
|
509 | 015cb166 | Alex Williamson | return 0; |
510 | 015cb166 | Alex Williamson | } else if (n->alluni || n->mac_table.uni_overflow) { |
511 | 8fd2a2f1 | Alex Williamson | return 1; |
512 | 8fd2a2f1 | Alex Williamson | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
513 | bbe2f399 | Alex Williamson | return 1; |
514 | bbe2f399 | Alex Williamson | } |
515 | 3831ab20 | aliguori | |
516 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.first_multi; i++) { |
517 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
518 | 2d9aba39 | Alex Williamson | return 1; |
519 | 2d9aba39 | Alex Williamson | } |
520 | 2d9aba39 | Alex Williamson | } |
521 | b6503ed9 | aliguori | } |
522 | b6503ed9 | aliguori | |
523 | 3831ab20 | aliguori | return 0; |
524 | 3831ab20 | aliguori | } |
525 | 3831ab20 | aliguori | |
526 | eb6b6c12 | Mark McLoughlin | static ssize_t virtio_net_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
527 | fbe78f4f | aliguori | { |
528 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
529 | fbe78f4f | aliguori | struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL; |
530 | 4689f4b3 | aliguori | size_t hdr_len, offset, i; |
531 | fbe78f4f | aliguori | |
532 | eb6b6c12 | Mark McLoughlin | if (!virtio_net_can_receive(&n->nic->nc))
|
533 | cdd5cc12 | Mark McLoughlin | return -1; |
534 | cdd5cc12 | Mark McLoughlin | |
535 | 940cda94 | Michael S. Tsirkin | /* hdr_len refers to the header we supply to the guest */
|
536 | 940cda94 | Michael S. Tsirkin | hdr_len = n->mergeable_rx_bufs ? |
537 | 940cda94 | Michael S. Tsirkin | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
538 | 940cda94 | Michael S. Tsirkin | |
539 | 940cda94 | Michael S. Tsirkin | |
540 | 940cda94 | Michael S. Tsirkin | if (!virtio_net_has_buffers(n, size + hdr_len))
|
541 | 8aeff62d | Mark McLoughlin | return 0; |
542 | fbe78f4f | aliguori | |
543 | 3831ab20 | aliguori | if (!receive_filter(n, buf, size))
|
544 | 4f1c942b | Mark McLoughlin | return size;
|
545 | 3831ab20 | aliguori | |
546 | fbe78f4f | aliguori | offset = i = 0;
|
547 | fbe78f4f | aliguori | |
548 | fbe78f4f | aliguori | while (offset < size) {
|
549 | fbe78f4f | aliguori | VirtQueueElement elem; |
550 | fbe78f4f | aliguori | int len, total;
|
551 | fbe78f4f | aliguori | struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
552 | fbe78f4f | aliguori | |
553 | 22c253d9 | Amit Shah | total = 0;
|
554 | fbe78f4f | aliguori | |
555 | fbe78f4f | aliguori | if ((i != 0 && !n->mergeable_rx_bufs) || |
556 | fbe78f4f | aliguori | virtqueue_pop(n->rx_vq, &elem) == 0) {
|
557 | fbe78f4f | aliguori | if (i == 0) |
558 | 4f1c942b | Mark McLoughlin | return -1; |
559 | 940cda94 | Michael S. Tsirkin | fprintf(stderr, "virtio-net truncating packet: "
|
560 | 940cda94 | Michael S. Tsirkin | "offset %zd, size %zd, hdr_len %zd\n",
|
561 | 940cda94 | Michael S. Tsirkin | offset, size, hdr_len); |
562 | fbe78f4f | aliguori | exit(1);
|
563 | fbe78f4f | aliguori | } |
564 | fbe78f4f | aliguori | |
565 | fbe78f4f | aliguori | if (elem.in_num < 1) { |
566 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net receive queue contains no in buffers\n");
|
567 | fbe78f4f | aliguori | exit(1);
|
568 | fbe78f4f | aliguori | } |
569 | fbe78f4f | aliguori | |
570 | fbe78f4f | aliguori | if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { |
571 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net header not in first element\n");
|
572 | fbe78f4f | aliguori | exit(1);
|
573 | fbe78f4f | aliguori | } |
574 | fbe78f4f | aliguori | |
575 | fbe78f4f | aliguori | memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
576 | fbe78f4f | aliguori | |
577 | fbe78f4f | aliguori | if (i == 0) { |
578 | fbe78f4f | aliguori | if (n->mergeable_rx_bufs)
|
579 | fbe78f4f | aliguori | mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
580 | fbe78f4f | aliguori | |
581 | fbe78f4f | aliguori | offset += receive_header(n, sg, elem.in_num, |
582 | fbe78f4f | aliguori | buf + offset, size - offset, hdr_len); |
583 | fbe78f4f | aliguori | total += hdr_len; |
584 | fbe78f4f | aliguori | } |
585 | fbe78f4f | aliguori | |
586 | fbe78f4f | aliguori | /* copy in packet. ugh */
|
587 | e4d5639d | Amit Shah | len = iov_from_buf(sg, elem.in_num, |
588 | e4d5639d | Amit Shah | buf + offset, size - offset); |
589 | fbe78f4f | aliguori | total += len; |
590 | fbe78f4f | aliguori | |
591 | fbe78f4f | aliguori | /* signal other side */
|
592 | fbe78f4f | aliguori | virtqueue_fill(n->rx_vq, &elem, total, i++); |
593 | fbe78f4f | aliguori | |
594 | fbe78f4f | aliguori | offset += len; |
595 | fbe78f4f | aliguori | } |
596 | fbe78f4f | aliguori | |
597 | fbe78f4f | aliguori | if (mhdr)
|
598 | fbe78f4f | aliguori | mhdr->num_buffers = i; |
599 | fbe78f4f | aliguori | |
600 | fbe78f4f | aliguori | virtqueue_flush(n->rx_vq, i); |
601 | fbe78f4f | aliguori | virtio_notify(&n->vdev, n->rx_vq); |
602 | 4f1c942b | Mark McLoughlin | |
603 | 4f1c942b | Mark McLoughlin | return size;
|
604 | fbe78f4f | aliguori | } |
605 | fbe78f4f | aliguori | |
606 | 6243375f | Mark McLoughlin | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
607 | 6243375f | Mark McLoughlin | |
608 | eb6b6c12 | Mark McLoughlin | static void virtio_net_tx_complete(VLANClientState *nc, ssize_t len) |
609 | 6243375f | Mark McLoughlin | { |
610 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
611 | 6243375f | Mark McLoughlin | |
612 | 6243375f | Mark McLoughlin | virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); |
613 | 6243375f | Mark McLoughlin | virtio_notify(&n->vdev, n->tx_vq); |
614 | 6243375f | Mark McLoughlin | |
615 | 6243375f | Mark McLoughlin | n->async_tx.elem.out_num = n->async_tx.len = 0;
|
616 | 6243375f | Mark McLoughlin | |
617 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 1);
|
618 | 6243375f | Mark McLoughlin | virtio_net_flush_tx(n, n->tx_vq); |
619 | 6243375f | Mark McLoughlin | } |
620 | 6243375f | Mark McLoughlin | |
621 | fbe78f4f | aliguori | /* TX */
|
622 | fbe78f4f | aliguori | static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
623 | fbe78f4f | aliguori | { |
624 | fbe78f4f | aliguori | VirtQueueElement elem; |
625 | fbe78f4f | aliguori | |
626 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
627 | fbe78f4f | aliguori | return;
|
628 | fbe78f4f | aliguori | |
629 | 6243375f | Mark McLoughlin | if (n->async_tx.elem.out_num) {
|
630 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
631 | 6243375f | Mark McLoughlin | return;
|
632 | 6243375f | Mark McLoughlin | } |
633 | 6243375f | Mark McLoughlin | |
634 | fbe78f4f | aliguori | while (virtqueue_pop(vq, &elem)) {
|
635 | 6243375f | Mark McLoughlin | ssize_t ret, len = 0;
|
636 | fbe78f4f | aliguori | unsigned int out_num = elem.out_num; |
637 | fbe78f4f | aliguori | struct iovec *out_sg = &elem.out_sg[0]; |
638 | fbe78f4f | aliguori | unsigned hdr_len;
|
639 | fbe78f4f | aliguori | |
640 | fbe78f4f | aliguori | /* hdr_len refers to the header received from the guest */
|
641 | fbe78f4f | aliguori | hdr_len = n->mergeable_rx_bufs ? |
642 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
643 | fbe78f4f | aliguori | sizeof(struct virtio_net_hdr); |
644 | fbe78f4f | aliguori | |
645 | fbe78f4f | aliguori | if (out_num < 1 || out_sg->iov_len != hdr_len) { |
646 | fbe78f4f | aliguori | fprintf(stderr, "virtio-net header not in first element\n");
|
647 | fbe78f4f | aliguori | exit(1);
|
648 | fbe78f4f | aliguori | } |
649 | fbe78f4f | aliguori | |
650 | fbe78f4f | aliguori | /* ignore the header if GSO is not supported */
|
651 | 3a330134 | Mark McLoughlin | if (!n->has_vnet_hdr) {
|
652 | fbe78f4f | aliguori | out_num--; |
653 | fbe78f4f | aliguori | out_sg++; |
654 | fbe78f4f | aliguori | len += hdr_len; |
655 | fbe78f4f | aliguori | } else if (n->mergeable_rx_bufs) { |
656 | fbe78f4f | aliguori | /* tapfd expects a struct virtio_net_hdr */
|
657 | fbe78f4f | aliguori | hdr_len -= sizeof(struct virtio_net_hdr); |
658 | fbe78f4f | aliguori | out_sg->iov_len -= hdr_len; |
659 | fbe78f4f | aliguori | len += hdr_len; |
660 | fbe78f4f | aliguori | } |
661 | fbe78f4f | aliguori | |
662 | eb6b6c12 | Mark McLoughlin | ret = qemu_sendv_packet_async(&n->nic->nc, out_sg, out_num, |
663 | 6243375f | Mark McLoughlin | virtio_net_tx_complete); |
664 | 6243375f | Mark McLoughlin | if (ret == 0) { |
665 | 6243375f | Mark McLoughlin | virtio_queue_set_notification(n->tx_vq, 0);
|
666 | 6243375f | Mark McLoughlin | n->async_tx.elem = elem; |
667 | 6243375f | Mark McLoughlin | n->async_tx.len = len; |
668 | 6243375f | Mark McLoughlin | return;
|
669 | 6243375f | Mark McLoughlin | } |
670 | 6243375f | Mark McLoughlin | |
671 | 6243375f | Mark McLoughlin | len += ret; |
672 | fbe78f4f | aliguori | |
673 | fbe78f4f | aliguori | virtqueue_push(vq, &elem, len); |
674 | fbe78f4f | aliguori | virtio_notify(&n->vdev, vq); |
675 | fbe78f4f | aliguori | } |
676 | fbe78f4f | aliguori | } |
677 | fbe78f4f | aliguori | |
678 | fbe78f4f | aliguori | static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) |
679 | fbe78f4f | aliguori | { |
680 | fbe78f4f | aliguori | VirtIONet *n = to_virtio_net(vdev); |
681 | fbe78f4f | aliguori | |
682 | fbe78f4f | aliguori | if (n->tx_timer_active) {
|
683 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 1);
|
684 | fbe78f4f | aliguori | qemu_del_timer(n->tx_timer); |
685 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
686 | fbe78f4f | aliguori | virtio_net_flush_tx(n, vq); |
687 | fbe78f4f | aliguori | } else {
|
688 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
689 | fbe78f4f | aliguori | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
690 | fbe78f4f | aliguori | n->tx_timer_active = 1;
|
691 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 0);
|
692 | fbe78f4f | aliguori | } |
693 | fbe78f4f | aliguori | } |
694 | fbe78f4f | aliguori | |
695 | fbe78f4f | aliguori | static void virtio_net_tx_timer(void *opaque) |
696 | fbe78f4f | aliguori | { |
697 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
698 | fbe78f4f | aliguori | |
699 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
700 | fbe78f4f | aliguori | |
701 | fbe78f4f | aliguori | /* Just in case the driver is not ready on more */
|
702 | fbe78f4f | aliguori | if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
|
703 | fbe78f4f | aliguori | return;
|
704 | fbe78f4f | aliguori | |
705 | fbe78f4f | aliguori | virtio_queue_set_notification(n->tx_vq, 1);
|
706 | fbe78f4f | aliguori | virtio_net_flush_tx(n, n->tx_vq); |
707 | fbe78f4f | aliguori | } |
708 | fbe78f4f | aliguori | |
709 | fbe78f4f | aliguori | static void virtio_net_save(QEMUFile *f, void *opaque) |
710 | fbe78f4f | aliguori | { |
711 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
712 | fbe78f4f | aliguori | |
713 | 9bc6304c | Michael S. Tsirkin | if (n->vhost_started) {
|
714 | 9bc6304c | Michael S. Tsirkin | /* TODO: should we really stop the backend?
|
715 | 9bc6304c | Michael S. Tsirkin | * If we don't, it might keep writing to memory. */
|
716 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), &n->vdev); |
717 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 0;
|
718 | 9bc6304c | Michael S. Tsirkin | } |
719 | fbe78f4f | aliguori | virtio_save(&n->vdev, f); |
720 | fbe78f4f | aliguori | |
721 | 79674068 | aliguori | qemu_put_buffer(f, n->mac, ETH_ALEN); |
722 | fbe78f4f | aliguori | qemu_put_be32(f, n->tx_timer_active); |
723 | e46cb38f | aliguori | qemu_put_be32(f, n->mergeable_rx_bufs); |
724 | 9d6271b8 | aliguori | qemu_put_be16(f, n->status); |
725 | f10c592e | Alex Williamson | qemu_put_byte(f, n->promisc); |
726 | f10c592e | Alex Williamson | qemu_put_byte(f, n->allmulti); |
727 | b6503ed9 | aliguori | qemu_put_be32(f, n->mac_table.in_use); |
728 | b6503ed9 | aliguori | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
729 | f21c0ed9 | aliguori | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
730 | 3a330134 | Mark McLoughlin | qemu_put_be32(f, n->has_vnet_hdr); |
731 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.multi_overflow); |
732 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.uni_overflow); |
733 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->alluni); |
734 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nomulti); |
735 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nouni); |
736 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nobcast); |
737 | 0ce0e8f4 | Mark McLoughlin | qemu_put_byte(f, n->has_ufo); |
738 | fbe78f4f | aliguori | } |
739 | fbe78f4f | aliguori | |
740 | fbe78f4f | aliguori | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
741 | fbe78f4f | aliguori | { |
742 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
743 | 2d9aba39 | Alex Williamson | int i;
|
744 | fbe78f4f | aliguori | |
745 | 9d6271b8 | aliguori | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
746 | fbe78f4f | aliguori | return -EINVAL;
|
747 | fbe78f4f | aliguori | |
748 | fbe78f4f | aliguori | virtio_load(&n->vdev, f); |
749 | fbe78f4f | aliguori | |
750 | 79674068 | aliguori | qemu_get_buffer(f, n->mac, ETH_ALEN); |
751 | fbe78f4f | aliguori | n->tx_timer_active = qemu_get_be32(f); |
752 | e46cb38f | aliguori | n->mergeable_rx_bufs = qemu_get_be32(f); |
753 | fbe78f4f | aliguori | |
754 | 9d6271b8 | aliguori | if (version_id >= 3) |
755 | 9d6271b8 | aliguori | n->status = qemu_get_be16(f); |
756 | 9d6271b8 | aliguori | |
757 | 002437cd | aliguori | if (version_id >= 4) { |
758 | f10c592e | Alex Williamson | if (version_id < 8) { |
759 | f10c592e | Alex Williamson | n->promisc = qemu_get_be32(f); |
760 | f10c592e | Alex Williamson | n->allmulti = qemu_get_be32(f); |
761 | f10c592e | Alex Williamson | } else {
|
762 | f10c592e | Alex Williamson | n->promisc = qemu_get_byte(f); |
763 | f10c592e | Alex Williamson | n->allmulti = qemu_get_byte(f); |
764 | f10c592e | Alex Williamson | } |
765 | 002437cd | aliguori | } |
766 | 002437cd | aliguori | |
767 | b6503ed9 | aliguori | if (version_id >= 5) { |
768 | b6503ed9 | aliguori | n->mac_table.in_use = qemu_get_be32(f); |
769 | b6503ed9 | aliguori | /* MAC_TABLE_ENTRIES may be different from the saved image */
|
770 | b6503ed9 | aliguori | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
771 | b6503ed9 | aliguori | qemu_get_buffer(f, n->mac_table.macs, |
772 | b6503ed9 | aliguori | n->mac_table.in_use * ETH_ALEN); |
773 | b6503ed9 | aliguori | } else if (n->mac_table.in_use) { |
774 | b6503ed9 | aliguori | qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR); |
775 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
776 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
777 | b6503ed9 | aliguori | } |
778 | b6503ed9 | aliguori | } |
779 | b6503ed9 | aliguori | |
780 | f21c0ed9 | aliguori | if (version_id >= 6) |
781 | f21c0ed9 | aliguori | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
782 | f21c0ed9 | aliguori | |
783 | 3a330134 | Mark McLoughlin | if (version_id >= 7) { |
784 | 3a330134 | Mark McLoughlin | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
785 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires vnet_hdr=on");
|
786 | 3a330134 | Mark McLoughlin | return -1; |
787 | 3a330134 | Mark McLoughlin | } |
788 | 3a330134 | Mark McLoughlin | |
789 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
790 | eb6b6c12 | Mark McLoughlin | tap_using_vnet_hdr(n->nic->nc.peer, 1);
|
791 | eb6b6c12 | Mark McLoughlin | tap_set_offload(n->nic->nc.peer, |
792 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
793 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
794 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
795 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
796 | 704a76fc | Michael S. Tsirkin | (n->vdev.guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
797 | 3a330134 | Mark McLoughlin | } |
798 | 6c042c16 | Alex Williamson | } |
799 | 6c042c16 | Alex Williamson | |
800 | 8fd2a2f1 | Alex Williamson | if (version_id >= 9) { |
801 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = qemu_get_byte(f); |
802 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = qemu_get_byte(f); |
803 | 8fd2a2f1 | Alex Williamson | } |
804 | 8fd2a2f1 | Alex Williamson | |
805 | 015cb166 | Alex Williamson | if (version_id >= 10) { |
806 | 015cb166 | Alex Williamson | n->alluni = qemu_get_byte(f); |
807 | 015cb166 | Alex Williamson | n->nomulti = qemu_get_byte(f); |
808 | 015cb166 | Alex Williamson | n->nouni = qemu_get_byte(f); |
809 | 015cb166 | Alex Williamson | n->nobcast = qemu_get_byte(f); |
810 | 015cb166 | Alex Williamson | } |
811 | 015cb166 | Alex Williamson | |
812 | 0ce0e8f4 | Mark McLoughlin | if (version_id >= 11) { |
813 | 0ce0e8f4 | Mark McLoughlin | if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
814 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires TUN_F_UFO support");
|
815 | 0ce0e8f4 | Mark McLoughlin | return -1; |
816 | 0ce0e8f4 | Mark McLoughlin | } |
817 | 0ce0e8f4 | Mark McLoughlin | } |
818 | 0ce0e8f4 | Mark McLoughlin | |
819 | 2d9aba39 | Alex Williamson | /* Find the first multicast entry in the saved MAC filter */
|
820 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.in_use; i++) { |
821 | 2d9aba39 | Alex Williamson | if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
822 | 2d9aba39 | Alex Williamson | break;
|
823 | 2d9aba39 | Alex Williamson | } |
824 | 2d9aba39 | Alex Williamson | } |
825 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = i; |
826 | 2d9aba39 | Alex Williamson | |
827 | fbe78f4f | aliguori | if (n->tx_timer_active) {
|
828 | fbe78f4f | aliguori | qemu_mod_timer(n->tx_timer, |
829 | fbe78f4f | aliguori | qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
830 | fbe78f4f | aliguori | } |
831 | fbe78f4f | aliguori | return 0; |
832 | fbe78f4f | aliguori | } |
833 | fbe78f4f | aliguori | |
834 | eb6b6c12 | Mark McLoughlin | static void virtio_net_cleanup(VLANClientState *nc) |
835 | b946a153 | aliguori | { |
836 | eb6b6c12 | Mark McLoughlin | VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque; |
837 | b946a153 | aliguori | |
838 | eb6b6c12 | Mark McLoughlin | n->nic = NULL;
|
839 | b946a153 | aliguori | } |
840 | b946a153 | aliguori | |
841 | eb6b6c12 | Mark McLoughlin | static NetClientInfo net_virtio_info = {
|
842 | eb6b6c12 | Mark McLoughlin | .type = NET_CLIENT_TYPE_NIC, |
843 | eb6b6c12 | Mark McLoughlin | .size = sizeof(NICState),
|
844 | eb6b6c12 | Mark McLoughlin | .can_receive = virtio_net_can_receive, |
845 | eb6b6c12 | Mark McLoughlin | .receive = virtio_net_receive, |
846 | eb6b6c12 | Mark McLoughlin | .cleanup = virtio_net_cleanup, |
847 | eb6b6c12 | Mark McLoughlin | .link_status_changed = virtio_net_set_link_status, |
848 | eb6b6c12 | Mark McLoughlin | }; |
849 | eb6b6c12 | Mark McLoughlin | |
850 | 9bc6304c | Michael S. Tsirkin | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
851 | 9bc6304c | Michael S. Tsirkin | { |
852 | 9bc6304c | Michael S. Tsirkin | VirtIONet *n = to_virtio_net(vdev); |
853 | 9bc6304c | Michael S. Tsirkin | if (!n->nic->nc.peer) {
|
854 | 9bc6304c | Michael S. Tsirkin | return;
|
855 | 9bc6304c | Michael S. Tsirkin | } |
856 | 9bc6304c | Michael S. Tsirkin | if (n->nic->nc.peer->info->type != NET_CLIENT_TYPE_TAP) {
|
857 | 9bc6304c | Michael S. Tsirkin | return;
|
858 | 9bc6304c | Michael S. Tsirkin | } |
859 | 9bc6304c | Michael S. Tsirkin | |
860 | 9bc6304c | Michael S. Tsirkin | if (!tap_get_vhost_net(n->nic->nc.peer)) {
|
861 | 9bc6304c | Michael S. Tsirkin | return;
|
862 | 9bc6304c | Michael S. Tsirkin | } |
863 | 9bc6304c | Michael S. Tsirkin | if (!!n->vhost_started == !!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
864 | 9bc6304c | Michael S. Tsirkin | return;
|
865 | 9bc6304c | Michael S. Tsirkin | } |
866 | 9bc6304c | Michael S. Tsirkin | if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
|
867 | 9bc6304c | Michael S. Tsirkin | int r = vhost_net_start(tap_get_vhost_net(n->nic->nc.peer), vdev);
|
868 | 9bc6304c | Michael S. Tsirkin | if (r < 0) { |
869 | 9bc6304c | Michael S. Tsirkin | fprintf(stderr, "unable to start vhost net: %d: "
|
870 | 9bc6304c | Michael S. Tsirkin | "falling back on userspace virtio\n", -r);
|
871 | 9bc6304c | Michael S. Tsirkin | } else {
|
872 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 1;
|
873 | 9bc6304c | Michael S. Tsirkin | } |
874 | 9bc6304c | Michael S. Tsirkin | } else {
|
875 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); |
876 | 9bc6304c | Michael S. Tsirkin | n->vhost_started = 0;
|
877 | 9bc6304c | Michael S. Tsirkin | } |
878 | 9bc6304c | Michael S. Tsirkin | } |
879 | 9bc6304c | Michael S. Tsirkin | |
880 | 9bc6304c | Michael S. Tsirkin | static void virtio_net_vmstate_change(void *opaque, int running, int reason) |
881 | 9bc6304c | Michael S. Tsirkin | { |
882 | 9bc6304c | Michael S. Tsirkin | VirtIONet *n = opaque; |
883 | 7f974481 | Michael S. Tsirkin | uint8_t status = running ? VIRTIO_CONFIG_S_DRIVER_OK : 0;
|
884 | 7f974481 | Michael S. Tsirkin | /* This is called when vm is started/stopped,
|
885 | 7f974481 | Michael S. Tsirkin | * it will start/stop vhost backend if * appropriate
|
886 | 7f974481 | Michael S. Tsirkin | * e.g. after migration. */
|
887 | 7f974481 | Michael S. Tsirkin | virtio_net_set_status(&n->vdev, n->vdev.status & status); |
888 | 9bc6304c | Michael S. Tsirkin | } |
889 | 9bc6304c | Michael S. Tsirkin | |
890 | 97b15621 | Gerd Hoffmann | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf) |
891 | fbe78f4f | aliguori | { |
892 | fbe78f4f | aliguori | VirtIONet *n; |
893 | fbe78f4f | aliguori | static int virtio_net_id; |
894 | fbe78f4f | aliguori | |
895 | 53c25cea | Paul Brook | n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
|
896 | 53c25cea | Paul Brook | sizeof(struct virtio_net_config), |
897 | 53c25cea | Paul Brook | sizeof(VirtIONet));
|
898 | fbe78f4f | aliguori | |
899 | 0f03eca6 | aliguori | n->vdev.get_config = virtio_net_get_config; |
900 | 0f03eca6 | aliguori | n->vdev.set_config = virtio_net_set_config; |
901 | fbe78f4f | aliguori | n->vdev.get_features = virtio_net_get_features; |
902 | fbe78f4f | aliguori | n->vdev.set_features = virtio_net_set_features; |
903 | 8eca6b1b | aliguori | n->vdev.bad_features = virtio_net_bad_features; |
904 | 002437cd | aliguori | n->vdev.reset = virtio_net_reset; |
905 | 9bc6304c | Michael S. Tsirkin | n->vdev.set_status = virtio_net_set_status; |
906 | fbe78f4f | aliguori | n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
|
907 | fbe78f4f | aliguori | n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
|
908 | 4ffb17f5 | Alex Williamson | n->ctrl_vq = virtio_add_queue(&n->vdev, 64, virtio_net_handle_ctrl);
|
909 | 97b15621 | Gerd Hoffmann | qemu_macaddr_default_if_unset(&conf->macaddr); |
910 | 3cbe04c4 | Mark McLoughlin | memcpy(&n->mac[0], &conf->macaddr, sizeof(n->mac)); |
911 | 554c97dd | aliguori | n->status = VIRTIO_NET_S_LINK_UP; |
912 | fbe78f4f | aliguori | |
913 | eb6b6c12 | Mark McLoughlin | n->nic = qemu_new_nic(&net_virtio_info, conf, dev->info->name, dev->id, n); |
914 | eb6b6c12 | Mark McLoughlin | |
915 | eb6b6c12 | Mark McLoughlin | qemu_format_nic_info_str(&n->nic->nc, conf->macaddr.a); |
916 | 96d5e201 | aliguori | |
917 | fbe78f4f | aliguori | n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n); |
918 | fbe78f4f | aliguori | n->tx_timer_active = 0;
|
919 | fbe78f4f | aliguori | n->mergeable_rx_bufs = 0;
|
920 | 002437cd | aliguori | n->promisc = 1; /* for compatibility */ |
921 | fbe78f4f | aliguori | |
922 | b6503ed9 | aliguori | n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN); |
923 | b6503ed9 | aliguori | |
924 | f21c0ed9 | aliguori | n->vlans = qemu_mallocz(MAX_VLAN >> 3);
|
925 | f21c0ed9 | aliguori | |
926 | 9d6271b8 | aliguori | register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
|
927 | fbe78f4f | aliguori | virtio_net_save, virtio_net_load, n); |
928 | 9bc6304c | Michael S. Tsirkin | n->vmstate = qemu_add_vm_change_state_handler(virtio_net_vmstate_change, n); |
929 | cf21e106 | Paul Brook | |
930 | 53c25cea | Paul Brook | return &n->vdev;
|
931 | cf21e106 | Paul Brook | } |
932 | 97b15621 | Gerd Hoffmann | |
933 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev)
|
934 | 97b15621 | Gerd Hoffmann | { |
935 | 97b15621 | Gerd Hoffmann | VirtIONet *n = DO_UPCAST(VirtIONet, vdev, vdev); |
936 | 9bc6304c | Michael S. Tsirkin | qemu_del_vm_change_state_handler(n->vmstate); |
937 | 9bc6304c | Michael S. Tsirkin | |
938 | 9bc6304c | Michael S. Tsirkin | if (n->vhost_started) {
|
939 | 9bc6304c | Michael S. Tsirkin | vhost_net_stop(tap_get_vhost_net(n->nic->nc.peer), vdev); |
940 | 9bc6304c | Michael S. Tsirkin | } |
941 | 97b15621 | Gerd Hoffmann | |
942 | eb6b6c12 | Mark McLoughlin | qemu_purge_queued_packets(&n->nic->nc); |
943 | 97b15621 | Gerd Hoffmann | |
944 | 97b15621 | Gerd Hoffmann | unregister_savevm("virtio-net", n);
|
945 | 97b15621 | Gerd Hoffmann | |
946 | 97b15621 | Gerd Hoffmann | qemu_free(n->mac_table.macs); |
947 | 97b15621 | Gerd Hoffmann | qemu_free(n->vlans); |
948 | 97b15621 | Gerd Hoffmann | |
949 | 97b15621 | Gerd Hoffmann | qemu_del_timer(n->tx_timer); |
950 | 97b15621 | Gerd Hoffmann | qemu_free_timer(n->tx_timer); |
951 | 97b15621 | Gerd Hoffmann | |
952 | 97b15621 | Gerd Hoffmann | virtio_cleanup(&n->vdev); |
953 | eb6b6c12 | Mark McLoughlin | qemu_del_vlan_client(&n->nic->nc); |
954 | 97b15621 | Gerd Hoffmann | } |