root / hw / net / virtio-net.c @ 1773d9ee
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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 | 1de7afc9 | Paolo Bonzini | #include "qemu/iov.h" |
15 | 0d09e41a | Paolo Bonzini | #include "hw/virtio/virtio.h" |
16 | 1422e32d | Paolo Bonzini | #include "net/net.h" |
17 | 7200ac3c | Mark McLoughlin | #include "net/checksum.h" |
18 | a8ed73f7 | Mark McLoughlin | #include "net/tap.h" |
19 | 1de7afc9 | Paolo Bonzini | #include "qemu/error-report.h" |
20 | 1de7afc9 | Paolo Bonzini | #include "qemu/timer.h" |
21 | 0d09e41a | Paolo Bonzini | #include "hw/virtio/virtio-net.h" |
22 | 0d09e41a | Paolo Bonzini | #include "net/vhost_net.h" |
23 | 17ec5a86 | KONRAD Frederic | #include "hw/virtio/virtio-bus.h" |
24 | fbe78f4f | aliguori | |
25 | 0ce0e8f4 | Mark McLoughlin | #define VIRTIO_NET_VM_VERSION 11 |
26 | b6503ed9 | aliguori | |
27 | 4ffb17f5 | Alex Williamson | #define MAC_TABLE_ENTRIES 64 |
28 | f21c0ed9 | aliguori | #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
29 | 9d6271b8 | aliguori | |
30 | 14f9b664 | Jesse Larrew | /*
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31 | 14f9b664 | Jesse Larrew | * Calculate the number of bytes up to and including the given 'field' of
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32 | 14f9b664 | Jesse Larrew | * 'container'.
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33 | 14f9b664 | Jesse Larrew | */
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34 | 14f9b664 | Jesse Larrew | #define endof(container, field) \
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35 | 14f9b664 | Jesse Larrew | (offsetof(container, field) + sizeof(((container *)0)->field)) |
36 | 14f9b664 | Jesse Larrew | |
37 | 14f9b664 | Jesse Larrew | typedef struct VirtIOFeature { |
38 | 14f9b664 | Jesse Larrew | uint32_t flags; |
39 | 14f9b664 | Jesse Larrew | size_t end; |
40 | 14f9b664 | Jesse Larrew | } VirtIOFeature; |
41 | 14f9b664 | Jesse Larrew | |
42 | 14f9b664 | Jesse Larrew | static VirtIOFeature feature_sizes[] = {
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43 | 14f9b664 | Jesse Larrew | {.flags = 1 << VIRTIO_NET_F_MAC,
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44 | 14f9b664 | Jesse Larrew | .end = endof(struct virtio_net_config, mac)},
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45 | 14f9b664 | Jesse Larrew | {.flags = 1 << VIRTIO_NET_F_STATUS,
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46 | 14f9b664 | Jesse Larrew | .end = endof(struct virtio_net_config, status)},
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47 | 14f9b664 | Jesse Larrew | {.flags = 1 << VIRTIO_NET_F_MQ,
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48 | 14f9b664 | Jesse Larrew | .end = endof(struct virtio_net_config, max_virtqueue_pairs)},
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49 | 14f9b664 | Jesse Larrew | {} |
50 | 14f9b664 | Jesse Larrew | }; |
51 | 14f9b664 | Jesse Larrew | |
52 | fed699f9 | Jason Wang | static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc)
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53 | 0c87e93e | Jason Wang | { |
54 | 0c87e93e | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
55 | 0c87e93e | Jason Wang | |
56 | fed699f9 | Jason Wang | return &n->vqs[nc->queue_index];
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57 | 0c87e93e | Jason Wang | } |
58 | fed699f9 | Jason Wang | |
59 | fed699f9 | Jason Wang | static int vq2q(int queue_index) |
60 | fed699f9 | Jason Wang | { |
61 | fed699f9 | Jason Wang | return queue_index / 2; |
62 | fed699f9 | Jason Wang | } |
63 | fed699f9 | Jason Wang | |
64 | fbe78f4f | aliguori | /* TODO
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65 | fbe78f4f | aliguori | * - we could suppress RX interrupt if we were so inclined.
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66 | fbe78f4f | aliguori | */
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67 | fbe78f4f | aliguori | |
68 | 0f03eca6 | aliguori | static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
69 | fbe78f4f | aliguori | { |
70 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
71 | fbe78f4f | aliguori | struct virtio_net_config netcfg;
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72 | fbe78f4f | aliguori | |
73 | b46d97f2 | Stefan Hajnoczi | stw_p(&netcfg.status, n->status); |
74 | fed699f9 | Jason Wang | stw_p(&netcfg.max_virtqueue_pairs, n->max_queues); |
75 | 79674068 | aliguori | memcpy(netcfg.mac, n->mac, ETH_ALEN); |
76 | 14f9b664 | Jesse Larrew | memcpy(config, &netcfg, n->config_size); |
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 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
82 | 14f9b664 | Jesse Larrew | struct virtio_net_config netcfg = {};
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83 | 0f03eca6 | aliguori | |
84 | 14f9b664 | Jesse Larrew | memcpy(&netcfg, config, n->config_size); |
85 | 0f03eca6 | aliguori | |
86 | 17a0ca55 | KONRAD Frederic | if (!(vdev->guest_features >> VIRTIO_NET_F_CTRL_MAC_ADDR & 1) && |
87 | c1943a3f | Amos Kong | memcmp(netcfg.mac, n->mac, ETH_ALEN)) { |
88 | 79674068 | aliguori | memcpy(n->mac, netcfg.mac, ETH_ALEN); |
89 | b356f76d | Jason Wang | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
90 | 0f03eca6 | aliguori | } |
91 | 0f03eca6 | aliguori | } |
92 | 0f03eca6 | aliguori | |
93 | 783e7706 | Michael S. Tsirkin | static bool virtio_net_started(VirtIONet *n, uint8_t status) |
94 | 783e7706 | Michael S. Tsirkin | { |
95 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
96 | 783e7706 | Michael S. Tsirkin | return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
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97 | 17a0ca55 | KONRAD Frederic | (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; |
98 | 783e7706 | Michael S. Tsirkin | } |
99 | 783e7706 | Michael S. Tsirkin | |
100 | 783e7706 | Michael S. Tsirkin | static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) |
101 | afbaa7b4 | Michael S. Tsirkin | { |
102 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
103 | b356f76d | Jason Wang | NetClientState *nc = qemu_get_queue(n->nic); |
104 | fed699f9 | Jason Wang | int queues = n->multiqueue ? n->max_queues : 1; |
105 | b356f76d | Jason Wang | |
106 | b356f76d | Jason Wang | if (!nc->peer) {
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107 | afbaa7b4 | Michael S. Tsirkin | return;
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108 | afbaa7b4 | Michael S. Tsirkin | } |
109 | b356f76d | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
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110 | afbaa7b4 | Michael S. Tsirkin | return;
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111 | afbaa7b4 | Michael S. Tsirkin | } |
112 | afbaa7b4 | Michael S. Tsirkin | |
113 | b356f76d | Jason Wang | if (!tap_get_vhost_net(nc->peer)) {
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114 | afbaa7b4 | Michael S. Tsirkin | return;
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115 | afbaa7b4 | Michael S. Tsirkin | } |
116 | fed699f9 | Jason Wang | |
117 | 32993698 | Michael S. Tsirkin | if (!!n->vhost_started == virtio_net_started(n, status) &&
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118 | b356f76d | Jason Wang | !nc->peer->link_down) { |
119 | afbaa7b4 | Michael S. Tsirkin | return;
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120 | afbaa7b4 | Michael S. Tsirkin | } |
121 | afbaa7b4 | Michael S. Tsirkin | if (!n->vhost_started) {
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122 | 5430a28f | mst@redhat.com | int r;
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123 | 17a0ca55 | KONRAD Frederic | if (!vhost_net_query(tap_get_vhost_net(nc->peer), vdev)) {
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124 | 5430a28f | mst@redhat.com | return;
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125 | 5430a28f | mst@redhat.com | } |
126 | 1830b80f | Michael S. Tsirkin | n->vhost_started = 1;
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127 | 17a0ca55 | KONRAD Frederic | r = vhost_net_start(vdev, n->nic->ncs, queues); |
128 | afbaa7b4 | Michael S. Tsirkin | if (r < 0) { |
129 | e7b43f7e | Stefan Hajnoczi | error_report("unable to start vhost net: %d: "
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130 | e7b43f7e | Stefan Hajnoczi | "falling back on userspace virtio", -r);
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131 | 1830b80f | Michael S. Tsirkin | n->vhost_started = 0;
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132 | afbaa7b4 | Michael S. Tsirkin | } |
133 | afbaa7b4 | Michael S. Tsirkin | } else {
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134 | 17a0ca55 | KONRAD Frederic | vhost_net_stop(vdev, n->nic->ncs, queues); |
135 | afbaa7b4 | Michael S. Tsirkin | n->vhost_started = 0;
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136 | afbaa7b4 | Michael S. Tsirkin | } |
137 | afbaa7b4 | Michael S. Tsirkin | } |
138 | afbaa7b4 | Michael S. Tsirkin | |
139 | 783e7706 | Michael S. Tsirkin | static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) |
140 | 783e7706 | Michael S. Tsirkin | { |
141 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
142 | fed699f9 | Jason Wang | VirtIONetQueue *q; |
143 | fed699f9 | Jason Wang | int i;
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144 | fed699f9 | Jason Wang | uint8_t queue_status; |
145 | 783e7706 | Michael S. Tsirkin | |
146 | 783e7706 | Michael S. Tsirkin | virtio_net_vhost_status(n, status); |
147 | 783e7706 | Michael S. Tsirkin | |
148 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
149 | fed699f9 | Jason Wang | q = &n->vqs[i]; |
150 | 783e7706 | Michael S. Tsirkin | |
151 | fed699f9 | Jason Wang | if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { |
152 | fed699f9 | Jason Wang | queue_status = 0;
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153 | 783e7706 | Michael S. Tsirkin | } else {
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154 | fed699f9 | Jason Wang | queue_status = status; |
155 | 783e7706 | Michael S. Tsirkin | } |
156 | fed699f9 | Jason Wang | |
157 | fed699f9 | Jason Wang | if (!q->tx_waiting) {
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158 | fed699f9 | Jason Wang | continue;
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159 | fed699f9 | Jason Wang | } |
160 | fed699f9 | Jason Wang | |
161 | fed699f9 | Jason Wang | if (virtio_net_started(n, queue_status) && !n->vhost_started) {
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162 | fed699f9 | Jason Wang | if (q->tx_timer) {
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163 | fed699f9 | Jason Wang | qemu_mod_timer(q->tx_timer, |
164 | fed699f9 | Jason Wang | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
165 | fed699f9 | Jason Wang | } else {
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166 | fed699f9 | Jason Wang | qemu_bh_schedule(q->tx_bh); |
167 | fed699f9 | Jason Wang | } |
168 | 783e7706 | Michael S. Tsirkin | } else {
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169 | fed699f9 | Jason Wang | if (q->tx_timer) {
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170 | fed699f9 | Jason Wang | qemu_del_timer(q->tx_timer); |
171 | fed699f9 | Jason Wang | } else {
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172 | fed699f9 | Jason Wang | qemu_bh_cancel(q->tx_bh); |
173 | fed699f9 | Jason Wang | } |
174 | 783e7706 | Michael S. Tsirkin | } |
175 | 783e7706 | Michael S. Tsirkin | } |
176 | 783e7706 | Michael S. Tsirkin | } |
177 | 783e7706 | Michael S. Tsirkin | |
178 | 4e68f7a0 | Stefan Hajnoczi | static void virtio_net_set_link_status(NetClientState *nc) |
179 | 554c97dd | aliguori | { |
180 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
181 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
182 | 554c97dd | aliguori | uint16_t old_status = n->status; |
183 | 554c97dd | aliguori | |
184 | eb6b6c12 | Mark McLoughlin | if (nc->link_down)
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185 | 554c97dd | aliguori | n->status &= ~VIRTIO_NET_S_LINK_UP; |
186 | 554c97dd | aliguori | else
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187 | 554c97dd | aliguori | n->status |= VIRTIO_NET_S_LINK_UP; |
188 | 554c97dd | aliguori | |
189 | 554c97dd | aliguori | if (n->status != old_status)
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190 | 17a0ca55 | KONRAD Frederic | virtio_notify_config(vdev); |
191 | afbaa7b4 | Michael S. Tsirkin | |
192 | 17a0ca55 | KONRAD Frederic | virtio_net_set_status(vdev, vdev->status); |
193 | 554c97dd | aliguori | } |
194 | 554c97dd | aliguori | |
195 | 002437cd | aliguori | static void virtio_net_reset(VirtIODevice *vdev) |
196 | 002437cd | aliguori | { |
197 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
198 | 002437cd | aliguori | |
199 | 002437cd | aliguori | /* Reset back to compatibility mode */
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200 | 002437cd | aliguori | n->promisc = 1;
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201 | 002437cd | aliguori | n->allmulti = 0;
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202 | 015cb166 | Alex Williamson | n->alluni = 0;
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203 | 015cb166 | Alex Williamson | n->nomulti = 0;
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204 | 015cb166 | Alex Williamson | n->nouni = 0;
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205 | 015cb166 | Alex Williamson | n->nobcast = 0;
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206 | fed699f9 | Jason Wang | /* multiqueue is disabled by default */
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207 | fed699f9 | Jason Wang | n->curr_queues = 1;
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208 | b6503ed9 | aliguori | |
209 | f21c0ed9 | aliguori | /* Flush any MAC and VLAN filter table state */
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210 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
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211 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
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212 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
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213 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
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214 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
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215 | 41dc8a67 | Michael S. Tsirkin | memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); |
216 | f21c0ed9 | aliguori | memset(n->vlans, 0, MAX_VLAN >> 3); |
217 | 002437cd | aliguori | } |
218 | 002437cd | aliguori | |
219 | 6e371ab8 | Michael S. Tsirkin | static void peer_test_vnet_hdr(VirtIONet *n) |
220 | 3a330134 | Mark McLoughlin | { |
221 | b356f76d | Jason Wang | NetClientState *nc = qemu_get_queue(n->nic); |
222 | b356f76d | Jason Wang | if (!nc->peer) {
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223 | 6e371ab8 | Michael S. Tsirkin | return;
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224 | b356f76d | Jason Wang | } |
225 | 3a330134 | Mark McLoughlin | |
226 | b356f76d | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
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227 | 6e371ab8 | Michael S. Tsirkin | return;
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228 | b356f76d | Jason Wang | } |
229 | 3a330134 | Mark McLoughlin | |
230 | b356f76d | Jason Wang | n->has_vnet_hdr = tap_has_vnet_hdr(nc->peer); |
231 | 6e371ab8 | Michael S. Tsirkin | } |
232 | 3a330134 | Mark McLoughlin | |
233 | 6e371ab8 | Michael S. Tsirkin | static int peer_has_vnet_hdr(VirtIONet *n) |
234 | 6e371ab8 | Michael S. Tsirkin | { |
235 | 3a330134 | Mark McLoughlin | return n->has_vnet_hdr;
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236 | 3a330134 | Mark McLoughlin | } |
237 | 3a330134 | Mark McLoughlin | |
238 | 0ce0e8f4 | Mark McLoughlin | static int peer_has_ufo(VirtIONet *n) |
239 | 0ce0e8f4 | Mark McLoughlin | { |
240 | 0ce0e8f4 | Mark McLoughlin | if (!peer_has_vnet_hdr(n))
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241 | 0ce0e8f4 | Mark McLoughlin | return 0; |
242 | 0ce0e8f4 | Mark McLoughlin | |
243 | b356f76d | Jason Wang | n->has_ufo = tap_has_ufo(qemu_get_queue(n->nic)->peer); |
244 | 0ce0e8f4 | Mark McLoughlin | |
245 | 0ce0e8f4 | Mark McLoughlin | return n->has_ufo;
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246 | 0ce0e8f4 | Mark McLoughlin | } |
247 | 0ce0e8f4 | Mark McLoughlin | |
248 | ff3a8066 | Michael S. Tsirkin | static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs) |
249 | ff3a8066 | Michael S. Tsirkin | { |
250 | fed699f9 | Jason Wang | int i;
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251 | fed699f9 | Jason Wang | NetClientState *nc; |
252 | fed699f9 | Jason Wang | |
253 | ff3a8066 | Michael S. Tsirkin | n->mergeable_rx_bufs = mergeable_rx_bufs; |
254 | ff3a8066 | Michael S. Tsirkin | |
255 | ff3a8066 | Michael S. Tsirkin | n->guest_hdr_len = n->mergeable_rx_bufs ? |
256 | ff3a8066 | Michael S. Tsirkin | sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
257 | ff3a8066 | Michael S. Tsirkin | |
258 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
259 | fed699f9 | Jason Wang | nc = qemu_get_subqueue(n->nic, i); |
260 | fed699f9 | Jason Wang | |
261 | fed699f9 | Jason Wang | if (peer_has_vnet_hdr(n) &&
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262 | fed699f9 | Jason Wang | tap_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { |
263 | fed699f9 | Jason Wang | tap_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); |
264 | fed699f9 | Jason Wang | n->host_hdr_len = n->guest_hdr_len; |
265 | fed699f9 | Jason Wang | } |
266 | ff3a8066 | Michael S. Tsirkin | } |
267 | ff3a8066 | Michael S. Tsirkin | } |
268 | ff3a8066 | Michael S. Tsirkin | |
269 | fed699f9 | Jason Wang | static int peer_attach(VirtIONet *n, int index) |
270 | fed699f9 | Jason Wang | { |
271 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, index); |
272 | fed699f9 | Jason Wang | |
273 | fed699f9 | Jason Wang | if (!nc->peer) {
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274 | fed699f9 | Jason Wang | return 0; |
275 | fed699f9 | Jason Wang | } |
276 | fed699f9 | Jason Wang | |
277 | fed699f9 | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
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278 | fed699f9 | Jason Wang | return 0; |
279 | fed699f9 | Jason Wang | } |
280 | fed699f9 | Jason Wang | |
281 | fed699f9 | Jason Wang | return tap_enable(nc->peer);
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282 | fed699f9 | Jason Wang | } |
283 | fed699f9 | Jason Wang | |
284 | fed699f9 | Jason Wang | static int peer_detach(VirtIONet *n, int index) |
285 | fed699f9 | Jason Wang | { |
286 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, index); |
287 | fed699f9 | Jason Wang | |
288 | fed699f9 | Jason Wang | if (!nc->peer) {
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289 | fed699f9 | Jason Wang | return 0; |
290 | fed699f9 | Jason Wang | } |
291 | fed699f9 | Jason Wang | |
292 | fed699f9 | Jason Wang | if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
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293 | fed699f9 | Jason Wang | return 0; |
294 | fed699f9 | Jason Wang | } |
295 | fed699f9 | Jason Wang | |
296 | fed699f9 | Jason Wang | return tap_disable(nc->peer);
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297 | fed699f9 | Jason Wang | } |
298 | fed699f9 | Jason Wang | |
299 | fed699f9 | Jason Wang | static void virtio_net_set_queues(VirtIONet *n) |
300 | fed699f9 | Jason Wang | { |
301 | fed699f9 | Jason Wang | int i;
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302 | fed699f9 | Jason Wang | |
303 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
304 | fed699f9 | Jason Wang | if (i < n->curr_queues) {
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305 | fed699f9 | Jason Wang | assert(!peer_attach(n, i)); |
306 | fed699f9 | Jason Wang | } else {
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307 | fed699f9 | Jason Wang | assert(!peer_detach(n, i)); |
308 | fed699f9 | Jason Wang | } |
309 | fed699f9 | Jason Wang | } |
310 | fed699f9 | Jason Wang | } |
311 | fed699f9 | Jason Wang | |
312 | fed699f9 | Jason Wang | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl); |
313 | fed699f9 | Jason Wang | |
314 | 8172539d | Michael S. Tsirkin | static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
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315 | fbe78f4f | aliguori | { |
316 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
317 | b356f76d | Jason Wang | NetClientState *nc = qemu_get_queue(n->nic); |
318 | fbe78f4f | aliguori | |
319 | c9f79a3f | Michael S. Tsirkin | features |= (1 << VIRTIO_NET_F_MAC);
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320 | c9f79a3f | Michael S. Tsirkin | |
321 | 6e371ab8 | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n)) {
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322 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_CSUM);
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323 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO4);
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324 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_TSO6);
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325 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_ECN);
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326 | 8172539d | Michael S. Tsirkin | |
327 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_CSUM);
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328 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO4);
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329 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_TSO6);
|
330 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_ECN);
|
331 | 8172539d | Michael S. Tsirkin | } |
332 | 3a330134 | Mark McLoughlin | |
333 | 8172539d | Michael S. Tsirkin | if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) {
|
334 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_GUEST_UFO);
|
335 | 8172539d | Michael S. Tsirkin | features &= ~(0x1 << VIRTIO_NET_F_HOST_UFO);
|
336 | 3a330134 | Mark McLoughlin | } |
337 | 3a330134 | Mark McLoughlin | |
338 | b356f76d | Jason Wang | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
339 | 9bc6304c | Michael S. Tsirkin | return features;
|
340 | 9bc6304c | Michael S. Tsirkin | } |
341 | b356f76d | Jason Wang | if (!tap_get_vhost_net(nc->peer)) {
|
342 | 9bc6304c | Michael S. Tsirkin | return features;
|
343 | 9bc6304c | Michael S. Tsirkin | } |
344 | b356f76d | Jason Wang | return vhost_net_get_features(tap_get_vhost_net(nc->peer), features);
|
345 | fbe78f4f | aliguori | } |
346 | fbe78f4f | aliguori | |
347 | 8eca6b1b | aliguori | static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
|
348 | 8eca6b1b | aliguori | { |
349 | 8eca6b1b | aliguori | uint32_t features = 0;
|
350 | 8eca6b1b | aliguori | |
351 | 8eca6b1b | aliguori | /* Linux kernel 2.6.25. It understood MAC (as everyone must),
|
352 | 8eca6b1b | aliguori | * but also these: */
|
353 | 8eca6b1b | aliguori | features |= (1 << VIRTIO_NET_F_MAC);
|
354 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_CSUM);
|
355 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO4);
|
356 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_TSO6);
|
357 | 184bd048 | Dustin Kirkland | features |= (1 << VIRTIO_NET_F_HOST_ECN);
|
358 | 8eca6b1b | aliguori | |
359 | 8172539d | Michael S. Tsirkin | return features;
|
360 | 8eca6b1b | aliguori | } |
361 | 8eca6b1b | aliguori | |
362 | fbe78f4f | aliguori | static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features) |
363 | fbe78f4f | aliguori | { |
364 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
365 | fed699f9 | Jason Wang | int i;
|
366 | fed699f9 | Jason Wang | |
367 | fed699f9 | Jason Wang | virtio_net_set_multiqueue(n, !!(features & (1 << VIRTIO_NET_F_MQ)),
|
368 | fed699f9 | Jason Wang | !!(features & (1 << VIRTIO_NET_F_CTRL_VQ)));
|
369 | fbe78f4f | aliguori | |
370 | ff3a8066 | Michael S. Tsirkin | virtio_net_set_mrg_rx_bufs(n, !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF)));
|
371 | f5436dd9 | Mark McLoughlin | |
372 | f5436dd9 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
373 | fed699f9 | Jason Wang | tap_set_offload(qemu_get_subqueue(n->nic, 0)->peer,
|
374 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
375 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
376 | f5436dd9 | Mark McLoughlin | (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
377 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
378 | 6c9f58ba | Sridhar Samudrala | (features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
379 | f5436dd9 | Mark McLoughlin | } |
380 | fed699f9 | Jason Wang | |
381 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
382 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, i); |
383 | fed699f9 | Jason Wang | |
384 | fed699f9 | Jason Wang | if (!nc->peer || nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
|
385 | fed699f9 | Jason Wang | continue;
|
386 | fed699f9 | Jason Wang | } |
387 | fed699f9 | Jason Wang | if (!tap_get_vhost_net(nc->peer)) {
|
388 | fed699f9 | Jason Wang | continue;
|
389 | fed699f9 | Jason Wang | } |
390 | fed699f9 | Jason Wang | vhost_net_ack_features(tap_get_vhost_net(nc->peer), features); |
391 | dc14a397 | David L Stevens | } |
392 | fbe78f4f | aliguori | } |
393 | fbe78f4f | aliguori | |
394 | 002437cd | aliguori | static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, |
395 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov, unsigned int iov_cnt) |
396 | 002437cd | aliguori | { |
397 | 002437cd | aliguori | uint8_t on; |
398 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
399 | 002437cd | aliguori | |
400 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); |
401 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(on)) { |
402 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
403 | 002437cd | aliguori | } |
404 | 002437cd | aliguori | |
405 | dd23454b | Amos Kong | if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) {
|
406 | 002437cd | aliguori | n->promisc = on; |
407 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { |
408 | 002437cd | aliguori | n->allmulti = on; |
409 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { |
410 | 015cb166 | Alex Williamson | n->alluni = on; |
411 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { |
412 | 015cb166 | Alex Williamson | n->nomulti = on; |
413 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { |
414 | 015cb166 | Alex Williamson | n->nouni = on; |
415 | dd23454b | Amos Kong | } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { |
416 | 015cb166 | Alex Williamson | n->nobcast = on; |
417 | 921ac5d0 | Michael S. Tsirkin | } else {
|
418 | 002437cd | aliguori | return VIRTIO_NET_ERR;
|
419 | 921ac5d0 | Michael S. Tsirkin | } |
420 | 002437cd | aliguori | |
421 | 002437cd | aliguori | return VIRTIO_NET_OK;
|
422 | 002437cd | aliguori | } |
423 | 002437cd | aliguori | |
424 | b6503ed9 | aliguori | static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, |
425 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov, unsigned int iov_cnt) |
426 | b6503ed9 | aliguori | { |
427 | b6503ed9 | aliguori | struct virtio_net_ctrl_mac mac_data;
|
428 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
429 | b6503ed9 | aliguori | |
430 | c1943a3f | Amos Kong | if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) {
|
431 | c1943a3f | Amos Kong | if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { |
432 | c1943a3f | Amos Kong | return VIRTIO_NET_ERR;
|
433 | c1943a3f | Amos Kong | } |
434 | c1943a3f | Amos Kong | s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); |
435 | c1943a3f | Amos Kong | assert(s == sizeof(n->mac));
|
436 | b356f76d | Jason Wang | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); |
437 | c1943a3f | Amos Kong | return VIRTIO_NET_OK;
|
438 | c1943a3f | Amos Kong | } |
439 | c1943a3f | Amos Kong | |
440 | 921ac5d0 | Michael S. Tsirkin | if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) {
|
441 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
442 | 921ac5d0 | Michael S. Tsirkin | } |
443 | b6503ed9 | aliguori | |
444 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
445 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = 0;
|
446 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 0;
|
447 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = 0;
|
448 | b6503ed9 | aliguori | memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
|
449 | b6503ed9 | aliguori | |
450 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
|
451 | 921ac5d0 | Michael S. Tsirkin | sizeof(mac_data.entries));
|
452 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries = ldl_p(&mac_data.entries); |
453 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(mac_data.entries)) { |
454 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
455 | 921ac5d0 | Michael S. Tsirkin | } |
456 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, s); |
457 | b6503ed9 | aliguori | |
458 | 921ac5d0 | Michael S. Tsirkin | if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) {
|
459 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
460 | 921ac5d0 | Michael S. Tsirkin | } |
461 | b6503ed9 | aliguori | |
462 | b6503ed9 | aliguori | if (mac_data.entries <= MAC_TABLE_ENTRIES) {
|
463 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs,
|
464 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries * ETH_ALEN); |
465 | 921ac5d0 | Michael S. Tsirkin | if (s != mac_data.entries * ETH_ALEN) {
|
466 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
467 | 921ac5d0 | Michael S. Tsirkin | } |
468 | b6503ed9 | aliguori | n->mac_table.in_use += mac_data.entries; |
469 | b6503ed9 | aliguori | } else {
|
470 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = 1;
|
471 | b6503ed9 | aliguori | } |
472 | b6503ed9 | aliguori | |
473 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); |
474 | 921ac5d0 | Michael S. Tsirkin | |
475 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = n->mac_table.in_use; |
476 | 2d9aba39 | Alex Williamson | |
477 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries,
|
478 | 921ac5d0 | Michael S. Tsirkin | sizeof(mac_data.entries));
|
479 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries = ldl_p(&mac_data.entries); |
480 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(mac_data.entries)) { |
481 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
482 | 921ac5d0 | Michael S. Tsirkin | } |
483 | 921ac5d0 | Michael S. Tsirkin | |
484 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, s); |
485 | b6503ed9 | aliguori | |
486 | 921ac5d0 | Michael S. Tsirkin | if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) {
|
487 | b6503ed9 | aliguori | return VIRTIO_NET_ERR;
|
488 | 921ac5d0 | Michael S. Tsirkin | } |
489 | b6503ed9 | aliguori | |
490 | 921ac5d0 | Michael S. Tsirkin | if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
|
491 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, n->mac_table.macs,
|
492 | 921ac5d0 | Michael S. Tsirkin | mac_data.entries * ETH_ALEN); |
493 | 921ac5d0 | Michael S. Tsirkin | if (s != mac_data.entries * ETH_ALEN) {
|
494 | 921ac5d0 | Michael S. Tsirkin | return VIRTIO_NET_ERR;
|
495 | 8fd2a2f1 | Alex Williamson | } |
496 | 921ac5d0 | Michael S. Tsirkin | n->mac_table.in_use += mac_data.entries; |
497 | 921ac5d0 | Michael S. Tsirkin | } else {
|
498 | 921ac5d0 | Michael S. Tsirkin | n->mac_table.multi_overflow = 1;
|
499 | b6503ed9 | aliguori | } |
500 | b6503ed9 | aliguori | |
501 | b6503ed9 | aliguori | return VIRTIO_NET_OK;
|
502 | b6503ed9 | aliguori | } |
503 | b6503ed9 | aliguori | |
504 | f21c0ed9 | aliguori | static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, |
505 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov, unsigned int iov_cnt) |
506 | f21c0ed9 | aliguori | { |
507 | f21c0ed9 | aliguori | uint16_t vid; |
508 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
509 | f21c0ed9 | aliguori | |
510 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); |
511 | 921ac5d0 | Michael S. Tsirkin | vid = lduw_p(&vid); |
512 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(vid)) { |
513 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
514 | f21c0ed9 | aliguori | } |
515 | f21c0ed9 | aliguori | |
516 | f21c0ed9 | aliguori | if (vid >= MAX_VLAN)
|
517 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
518 | f21c0ed9 | aliguori | |
519 | f21c0ed9 | aliguori | if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
|
520 | f21c0ed9 | aliguori | n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); |
521 | f21c0ed9 | aliguori | else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) |
522 | f21c0ed9 | aliguori | n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); |
523 | f21c0ed9 | aliguori | else
|
524 | f21c0ed9 | aliguori | return VIRTIO_NET_ERR;
|
525 | f21c0ed9 | aliguori | |
526 | f21c0ed9 | aliguori | return VIRTIO_NET_OK;
|
527 | f21c0ed9 | aliguori | } |
528 | f21c0ed9 | aliguori | |
529 | fed699f9 | Jason Wang | static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, |
530 | f8f7c533 | Jason Wang | struct iovec *iov, unsigned int iov_cnt) |
531 | fed699f9 | Jason Wang | { |
532 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
533 | f8f7c533 | Jason Wang | struct virtio_net_ctrl_mq mq;
|
534 | f8f7c533 | Jason Wang | size_t s; |
535 | f8f7c533 | Jason Wang | uint16_t queues; |
536 | fed699f9 | Jason Wang | |
537 | f8f7c533 | Jason Wang | s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); |
538 | f8f7c533 | Jason Wang | if (s != sizeof(mq)) { |
539 | fed699f9 | Jason Wang | return VIRTIO_NET_ERR;
|
540 | fed699f9 | Jason Wang | } |
541 | fed699f9 | Jason Wang | |
542 | fed699f9 | Jason Wang | if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
|
543 | fed699f9 | Jason Wang | return VIRTIO_NET_ERR;
|
544 | fed699f9 | Jason Wang | } |
545 | fed699f9 | Jason Wang | |
546 | f8f7c533 | Jason Wang | queues = lduw_p(&mq.virtqueue_pairs); |
547 | fed699f9 | Jason Wang | |
548 | f8f7c533 | Jason Wang | if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
|
549 | f8f7c533 | Jason Wang | queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || |
550 | f8f7c533 | Jason Wang | queues > n->max_queues || |
551 | fed699f9 | Jason Wang | !n->multiqueue) { |
552 | fed699f9 | Jason Wang | return VIRTIO_NET_ERR;
|
553 | fed699f9 | Jason Wang | } |
554 | fed699f9 | Jason Wang | |
555 | f8f7c533 | Jason Wang | n->curr_queues = queues; |
556 | fed699f9 | Jason Wang | /* stop the backend before changing the number of queues to avoid handling a
|
557 | fed699f9 | Jason Wang | * disabled queue */
|
558 | 17a0ca55 | KONRAD Frederic | virtio_net_set_status(vdev, vdev->status); |
559 | fed699f9 | Jason Wang | virtio_net_set_queues(n); |
560 | fed699f9 | Jason Wang | |
561 | fed699f9 | Jason Wang | return VIRTIO_NET_OK;
|
562 | fed699f9 | Jason Wang | } |
563 | 3d11d36c | aliguori | static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
564 | 3d11d36c | aliguori | { |
565 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
566 | 3d11d36c | aliguori | struct virtio_net_ctrl_hdr ctrl;
|
567 | 3d11d36c | aliguori | virtio_net_ctrl_ack status = VIRTIO_NET_ERR; |
568 | 3d11d36c | aliguori | VirtQueueElement elem; |
569 | 921ac5d0 | Michael S. Tsirkin | size_t s; |
570 | 921ac5d0 | Michael S. Tsirkin | struct iovec *iov;
|
571 | 921ac5d0 | Michael S. Tsirkin | unsigned int iov_cnt; |
572 | 3d11d36c | aliguori | |
573 | 3d11d36c | aliguori | while (virtqueue_pop(vq, &elem)) {
|
574 | 921ac5d0 | Michael S. Tsirkin | if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || |
575 | 921ac5d0 | Michael S. Tsirkin | iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) {
|
576 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net ctrl missing headers");
|
577 | 3d11d36c | aliguori | exit(1);
|
578 | 3d11d36c | aliguori | } |
579 | 3d11d36c | aliguori | |
580 | 921ac5d0 | Michael S. Tsirkin | iov = elem.out_sg; |
581 | 921ac5d0 | Michael S. Tsirkin | iov_cnt = elem.out_num; |
582 | 921ac5d0 | Michael S. Tsirkin | s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); |
583 | 921ac5d0 | Michael S. Tsirkin | iov_discard_front(&iov, &iov_cnt, sizeof(ctrl));
|
584 | 921ac5d0 | Michael S. Tsirkin | if (s != sizeof(ctrl)) { |
585 | 921ac5d0 | Michael S. Tsirkin | status = VIRTIO_NET_ERR; |
586 | dd23454b | Amos Kong | } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { |
587 | 921ac5d0 | Michael S. Tsirkin | status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); |
588 | 921ac5d0 | Michael S. Tsirkin | } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { |
589 | 921ac5d0 | Michael S. Tsirkin | status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); |
590 | 921ac5d0 | Michael S. Tsirkin | } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { |
591 | 921ac5d0 | Michael S. Tsirkin | status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); |
592 | fed699f9 | Jason Wang | } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { |
593 | f8f7c533 | Jason Wang | status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); |
594 | 3d11d36c | aliguori | } |
595 | 3d11d36c | aliguori | |
596 | 921ac5d0 | Michael S. Tsirkin | s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); |
597 | 921ac5d0 | Michael S. Tsirkin | assert(s == sizeof(status));
|
598 | 3d11d36c | aliguori | |
599 | 3d11d36c | aliguori | virtqueue_push(vq, &elem, sizeof(status));
|
600 | 3d11d36c | aliguori | virtio_notify(vdev, vq); |
601 | 3d11d36c | aliguori | } |
602 | 3d11d36c | aliguori | } |
603 | 3d11d36c | aliguori | |
604 | fbe78f4f | aliguori | /* RX */
|
605 | fbe78f4f | aliguori | |
606 | fbe78f4f | aliguori | static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) |
607 | fbe78f4f | aliguori | { |
608 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
609 | fed699f9 | Jason Wang | int queue_index = vq2q(virtio_get_queue_index(vq));
|
610 | 8aeff62d | Mark McLoughlin | |
611 | fed699f9 | Jason Wang | qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); |
612 | fbe78f4f | aliguori | } |
613 | fbe78f4f | aliguori | |
614 | 4e68f7a0 | Stefan Hajnoczi | static int virtio_net_can_receive(NetClientState *nc) |
615 | fbe78f4f | aliguori | { |
616 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
617 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
618 | fed699f9 | Jason Wang | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
619 | 0c87e93e | Jason Wang | |
620 | 17a0ca55 | KONRAD Frederic | if (!vdev->vm_running) {
|
621 | 95477323 | Michael S. Tsirkin | return 0; |
622 | 95477323 | Michael S. Tsirkin | } |
623 | cdd5cc12 | Mark McLoughlin | |
624 | fed699f9 | Jason Wang | if (nc->queue_index >= n->curr_queues) {
|
625 | fed699f9 | Jason Wang | return 0; |
626 | fed699f9 | Jason Wang | } |
627 | fed699f9 | Jason Wang | |
628 | 0c87e93e | Jason Wang | if (!virtio_queue_ready(q->rx_vq) ||
|
629 | 17a0ca55 | KONRAD Frederic | !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
630 | fbe78f4f | aliguori | return 0; |
631 | 0c87e93e | Jason Wang | } |
632 | fbe78f4f | aliguori | |
633 | cdd5cc12 | Mark McLoughlin | return 1; |
634 | cdd5cc12 | Mark McLoughlin | } |
635 | cdd5cc12 | Mark McLoughlin | |
636 | 0c87e93e | Jason Wang | static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) |
637 | cdd5cc12 | Mark McLoughlin | { |
638 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
639 | 0c87e93e | Jason Wang | if (virtio_queue_empty(q->rx_vq) ||
|
640 | fbe78f4f | aliguori | (n->mergeable_rx_bufs && |
641 | 0c87e93e | Jason Wang | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
|
642 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->rx_vq, 1);
|
643 | 06b12970 | Tom Lendacky | |
644 | 06b12970 | Tom Lendacky | /* To avoid a race condition where the guest has made some buffers
|
645 | 06b12970 | Tom Lendacky | * available after the above check but before notification was
|
646 | 06b12970 | Tom Lendacky | * enabled, check for available buffers again.
|
647 | 06b12970 | Tom Lendacky | */
|
648 | 0c87e93e | Jason Wang | if (virtio_queue_empty(q->rx_vq) ||
|
649 | 06b12970 | Tom Lendacky | (n->mergeable_rx_bufs && |
650 | 0c87e93e | Jason Wang | !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) {
|
651 | 06b12970 | Tom Lendacky | return 0; |
652 | 0c87e93e | Jason Wang | } |
653 | fbe78f4f | aliguori | } |
654 | fbe78f4f | aliguori | |
655 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->rx_vq, 0);
|
656 | fbe78f4f | aliguori | return 1; |
657 | fbe78f4f | aliguori | } |
658 | fbe78f4f | aliguori | |
659 | 1d41b0c1 | Anthony Liguori | /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so
|
660 | 1d41b0c1 | Anthony Liguori | * it never finds out that the packets don't have valid checksums. This
|
661 | 1d41b0c1 | Anthony Liguori | * causes dhclient to get upset. Fedora's carried a patch for ages to
|
662 | 1d41b0c1 | Anthony Liguori | * fix this with Xen but it hasn't appeared in an upstream release of
|
663 | 1d41b0c1 | Anthony Liguori | * dhclient yet.
|
664 | 1d41b0c1 | Anthony Liguori | *
|
665 | 1d41b0c1 | Anthony Liguori | * To avoid breaking existing guests, we catch udp packets and add
|
666 | 1d41b0c1 | Anthony Liguori | * checksums. This is terrible but it's better than hacking the guest
|
667 | 1d41b0c1 | Anthony Liguori | * kernels.
|
668 | 1d41b0c1 | Anthony Liguori | *
|
669 | 1d41b0c1 | Anthony Liguori | * N.B. if we introduce a zero-copy API, this operation is no longer free so
|
670 | 1d41b0c1 | Anthony Liguori | * we should provide a mechanism to disable it to avoid polluting the host
|
671 | 1d41b0c1 | Anthony Liguori | * cache.
|
672 | 1d41b0c1 | Anthony Liguori | */
|
673 | 1d41b0c1 | Anthony Liguori | static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, |
674 | 22cc84db | Michael S. Tsirkin | uint8_t *buf, size_t size) |
675 | 1d41b0c1 | Anthony Liguori | { |
676 | 1d41b0c1 | Anthony Liguori | if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ |
677 | 1d41b0c1 | Anthony Liguori | (size > 27 && size < 1500) && /* normal sized MTU */ |
678 | 1d41b0c1 | Anthony Liguori | (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ |
679 | 1d41b0c1 | Anthony Liguori | (buf[23] == 17) && /* ip.protocol == UDP */ |
680 | 1d41b0c1 | Anthony Liguori | (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ |
681 | 22cc84db | Michael S. Tsirkin | net_checksum_calculate(buf, size); |
682 | 1d41b0c1 | Anthony Liguori | hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; |
683 | 1d41b0c1 | Anthony Liguori | } |
684 | 1d41b0c1 | Anthony Liguori | } |
685 | 1d41b0c1 | Anthony Liguori | |
686 | 280598b7 | Michael S. Tsirkin | static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, |
687 | 280598b7 | Michael S. Tsirkin | const void *buf, size_t size) |
688 | fbe78f4f | aliguori | { |
689 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
690 | 22cc84db | Michael S. Tsirkin | /* FIXME this cast is evil */
|
691 | 22cc84db | Michael S. Tsirkin | void *wbuf = (void *)buf; |
692 | 280598b7 | Michael S. Tsirkin | work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, |
693 | 280598b7 | Michael S. Tsirkin | size - n->host_hdr_len); |
694 | 280598b7 | Michael S. Tsirkin | iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); |
695 | 22cc84db | Michael S. Tsirkin | } else {
|
696 | 22cc84db | Michael S. Tsirkin | struct virtio_net_hdr hdr = {
|
697 | 22cc84db | Michael S. Tsirkin | .flags = 0,
|
698 | 22cc84db | Michael S. Tsirkin | .gso_type = VIRTIO_NET_HDR_GSO_NONE |
699 | 22cc84db | Michael S. Tsirkin | }; |
700 | 22cc84db | Michael S. Tsirkin | iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); |
701 | 3a330134 | Mark McLoughlin | } |
702 | fbe78f4f | aliguori | } |
703 | fbe78f4f | aliguori | |
704 | 3831ab20 | aliguori | static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
705 | 3831ab20 | aliguori | { |
706 | 3831ab20 | aliguori | static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
707 | f21c0ed9 | aliguori | static const uint8_t vlan[] = {0x81, 0x00}; |
708 | 3831ab20 | aliguori | uint8_t *ptr = (uint8_t *)buf; |
709 | b6503ed9 | aliguori | int i;
|
710 | 3831ab20 | aliguori | |
711 | 3831ab20 | aliguori | if (n->promisc)
|
712 | 3831ab20 | aliguori | return 1; |
713 | 3831ab20 | aliguori | |
714 | e043ebc6 | Michael S. Tsirkin | ptr += n->host_hdr_len; |
715 | 3a330134 | Mark McLoughlin | |
716 | f21c0ed9 | aliguori | if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { |
717 | f21c0ed9 | aliguori | int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; |
718 | f21c0ed9 | aliguori | if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) |
719 | f21c0ed9 | aliguori | return 0; |
720 | f21c0ed9 | aliguori | } |
721 | f21c0ed9 | aliguori | |
722 | bbe2f399 | Alex Williamson | if (ptr[0] & 1) { // multicast |
723 | bbe2f399 | Alex Williamson | if (!memcmp(ptr, bcast, sizeof(bcast))) { |
724 | 015cb166 | Alex Williamson | return !n->nobcast;
|
725 | 015cb166 | Alex Williamson | } else if (n->nomulti) { |
726 | 015cb166 | Alex Williamson | return 0; |
727 | 8fd2a2f1 | Alex Williamson | } else if (n->allmulti || n->mac_table.multi_overflow) { |
728 | bbe2f399 | Alex Williamson | return 1; |
729 | bbe2f399 | Alex Williamson | } |
730 | 2d9aba39 | Alex Williamson | |
731 | 2d9aba39 | Alex Williamson | for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) {
|
732 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
733 | 2d9aba39 | Alex Williamson | return 1; |
734 | 2d9aba39 | Alex Williamson | } |
735 | 2d9aba39 | Alex Williamson | } |
736 | bbe2f399 | Alex Williamson | } else { // unicast |
737 | 015cb166 | Alex Williamson | if (n->nouni) {
|
738 | 015cb166 | Alex Williamson | return 0; |
739 | 015cb166 | Alex Williamson | } else if (n->alluni || n->mac_table.uni_overflow) { |
740 | 8fd2a2f1 | Alex Williamson | return 1; |
741 | 8fd2a2f1 | Alex Williamson | } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
742 | bbe2f399 | Alex Williamson | return 1; |
743 | bbe2f399 | Alex Williamson | } |
744 | 3831ab20 | aliguori | |
745 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.first_multi; i++) { |
746 | 2d9aba39 | Alex Williamson | if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) {
|
747 | 2d9aba39 | Alex Williamson | return 1; |
748 | 2d9aba39 | Alex Williamson | } |
749 | 2d9aba39 | Alex Williamson | } |
750 | b6503ed9 | aliguori | } |
751 | b6503ed9 | aliguori | |
752 | 3831ab20 | aliguori | return 0; |
753 | 3831ab20 | aliguori | } |
754 | 3831ab20 | aliguori | |
755 | 4e68f7a0 | Stefan Hajnoczi | static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
756 | fbe78f4f | aliguori | { |
757 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
758 | fed699f9 | Jason Wang | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
759 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
760 | 63c58728 | Michael S. Tsirkin | struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE];
|
761 | 63c58728 | Michael S. Tsirkin | struct virtio_net_hdr_mrg_rxbuf mhdr;
|
762 | 63c58728 | Michael S. Tsirkin | unsigned mhdr_cnt = 0; |
763 | 22cc84db | Michael S. Tsirkin | size_t offset, i, guest_offset; |
764 | fbe78f4f | aliguori | |
765 | fed699f9 | Jason Wang | if (!virtio_net_can_receive(nc)) {
|
766 | cdd5cc12 | Mark McLoughlin | return -1; |
767 | b356f76d | Jason Wang | } |
768 | cdd5cc12 | Mark McLoughlin | |
769 | 940cda94 | Michael S. Tsirkin | /* hdr_len refers to the header we supply to the guest */
|
770 | 0c87e93e | Jason Wang | if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) {
|
771 | 8aeff62d | Mark McLoughlin | return 0; |
772 | 0c87e93e | Jason Wang | } |
773 | fbe78f4f | aliguori | |
774 | 3831ab20 | aliguori | if (!receive_filter(n, buf, size))
|
775 | 4f1c942b | Mark McLoughlin | return size;
|
776 | 3831ab20 | aliguori | |
777 | fbe78f4f | aliguori | offset = i = 0;
|
778 | fbe78f4f | aliguori | |
779 | fbe78f4f | aliguori | while (offset < size) {
|
780 | fbe78f4f | aliguori | VirtQueueElement elem; |
781 | fbe78f4f | aliguori | int len, total;
|
782 | 22cc84db | Michael S. Tsirkin | const struct iovec *sg = elem.in_sg; |
783 | fbe78f4f | aliguori | |
784 | 22c253d9 | Amit Shah | total = 0;
|
785 | fbe78f4f | aliguori | |
786 | 0c87e93e | Jason Wang | if (virtqueue_pop(q->rx_vq, &elem) == 0) { |
787 | fbe78f4f | aliguori | if (i == 0) |
788 | 4f1c942b | Mark McLoughlin | return -1; |
789 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net unexpected empty queue: "
|
790 | 279a4253 | Michael S. Tsirkin | "i %zd mergeable %d offset %zd, size %zd, "
|
791 | e7b43f7e | Stefan Hajnoczi | "guest hdr len %zd, host hdr len %zd guest features 0x%x",
|
792 | 279a4253 | Michael S. Tsirkin | i, n->mergeable_rx_bufs, offset, size, |
793 | 17a0ca55 | KONRAD Frederic | n->guest_hdr_len, n->host_hdr_len, vdev->guest_features); |
794 | fbe78f4f | aliguori | exit(1);
|
795 | fbe78f4f | aliguori | } |
796 | fbe78f4f | aliguori | |
797 | fbe78f4f | aliguori | if (elem.in_num < 1) { |
798 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net receive queue contains no in buffers");
|
799 | fbe78f4f | aliguori | exit(1);
|
800 | fbe78f4f | aliguori | } |
801 | fbe78f4f | aliguori | |
802 | fbe78f4f | aliguori | if (i == 0) { |
803 | c8d28e7e | Michael S. Tsirkin | assert(offset == 0);
|
804 | 63c58728 | Michael S. Tsirkin | if (n->mergeable_rx_bufs) {
|
805 | 63c58728 | Michael S. Tsirkin | mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), |
806 | 63c58728 | Michael S. Tsirkin | sg, elem.in_num, |
807 | 63c58728 | Michael S. Tsirkin | offsetof(typeof(mhdr), num_buffers), |
808 | 63c58728 | Michael S. Tsirkin | sizeof(mhdr.num_buffers));
|
809 | 63c58728 | Michael S. Tsirkin | } |
810 | fbe78f4f | aliguori | |
811 | c8d28e7e | Michael S. Tsirkin | receive_header(n, sg, elem.in_num, buf, size); |
812 | c8d28e7e | Michael S. Tsirkin | offset = n->host_hdr_len; |
813 | e35e23f6 | Michael S. Tsirkin | total += n->guest_hdr_len; |
814 | 22cc84db | Michael S. Tsirkin | guest_offset = n->guest_hdr_len; |
815 | 22cc84db | Michael S. Tsirkin | } else {
|
816 | 22cc84db | Michael S. Tsirkin | guest_offset = 0;
|
817 | fbe78f4f | aliguori | } |
818 | fbe78f4f | aliguori | |
819 | fbe78f4f | aliguori | /* copy in packet. ugh */
|
820 | 22cc84db | Michael S. Tsirkin | len = iov_from_buf(sg, elem.in_num, guest_offset, |
821 | dcf6f5e1 | Michael Tokarev | buf + offset, size - offset); |
822 | fbe78f4f | aliguori | total += len; |
823 | 279a4253 | Michael S. Tsirkin | offset += len; |
824 | 279a4253 | Michael S. Tsirkin | /* If buffers can't be merged, at this point we
|
825 | 279a4253 | Michael S. Tsirkin | * must have consumed the complete packet.
|
826 | 279a4253 | Michael S. Tsirkin | * Otherwise, drop it. */
|
827 | 279a4253 | Michael S. Tsirkin | if (!n->mergeable_rx_bufs && offset < size) {
|
828 | 279a4253 | Michael S. Tsirkin | #if 0
|
829 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net truncated non-mergeable packet: "
|
830 | e7b43f7e | Stefan Hajnoczi | "i %zd mergeable %d offset %zd, size %zd, "
|
831 | e7b43f7e | Stefan Hajnoczi | "guest hdr len %zd, host hdr len %zd",
|
832 | e7b43f7e | Stefan Hajnoczi | i, n->mergeable_rx_bufs,
|
833 | e35e23f6 | Michael S. Tsirkin | offset, size, n->guest_hdr_len, n->host_hdr_len);
|
834 | 279a4253 | Michael S. Tsirkin | #endif
|
835 | 279a4253 | Michael S. Tsirkin | return size;
|
836 | 279a4253 | Michael S. Tsirkin | } |
837 | fbe78f4f | aliguori | |
838 | fbe78f4f | aliguori | /* signal other side */
|
839 | 0c87e93e | Jason Wang | virtqueue_fill(q->rx_vq, &elem, total, i++); |
840 | fbe78f4f | aliguori | } |
841 | fbe78f4f | aliguori | |
842 | 63c58728 | Michael S. Tsirkin | if (mhdr_cnt) {
|
843 | 63c58728 | Michael S. Tsirkin | stw_p(&mhdr.num_buffers, i); |
844 | 63c58728 | Michael S. Tsirkin | iov_from_buf(mhdr_sg, mhdr_cnt, |
845 | 63c58728 | Michael S. Tsirkin | 0,
|
846 | 63c58728 | Michael S. Tsirkin | &mhdr.num_buffers, sizeof mhdr.num_buffers);
|
847 | 44b15bc5 | Aurelien Jarno | } |
848 | fbe78f4f | aliguori | |
849 | 0c87e93e | Jason Wang | virtqueue_flush(q->rx_vq, i); |
850 | 17a0ca55 | KONRAD Frederic | virtio_notify(vdev, q->rx_vq); |
851 | 4f1c942b | Mark McLoughlin | |
852 | 4f1c942b | Mark McLoughlin | return size;
|
853 | fbe78f4f | aliguori | } |
854 | fbe78f4f | aliguori | |
855 | 0c87e93e | Jason Wang | static int32_t virtio_net_flush_tx(VirtIONetQueue *q);
|
856 | 6243375f | Mark McLoughlin | |
857 | 4e68f7a0 | Stefan Hajnoczi | static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) |
858 | 6243375f | Mark McLoughlin | { |
859 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
860 | fed699f9 | Jason Wang | VirtIONetQueue *q = virtio_net_get_subqueue(nc); |
861 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
862 | 6243375f | Mark McLoughlin | |
863 | 0c87e93e | Jason Wang | virtqueue_push(q->tx_vq, &q->async_tx.elem, 0);
|
864 | 17a0ca55 | KONRAD Frederic | virtio_notify(vdev, q->tx_vq); |
865 | 6243375f | Mark McLoughlin | |
866 | 0c87e93e | Jason Wang | q->async_tx.elem.out_num = q->async_tx.len = 0;
|
867 | 6243375f | Mark McLoughlin | |
868 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 1);
|
869 | 0c87e93e | Jason Wang | virtio_net_flush_tx(q); |
870 | 6243375f | Mark McLoughlin | } |
871 | 6243375f | Mark McLoughlin | |
872 | fbe78f4f | aliguori | /* TX */
|
873 | 0c87e93e | Jason Wang | static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
|
874 | fbe78f4f | aliguori | { |
875 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
876 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
877 | fbe78f4f | aliguori | VirtQueueElement elem; |
878 | e3f30488 | Alex Williamson | int32_t num_packets = 0;
|
879 | fed699f9 | Jason Wang | int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
|
880 | 17a0ca55 | KONRAD Frederic | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
881 | e3f30488 | Alex Williamson | return num_packets;
|
882 | e3f30488 | Alex Williamson | } |
883 | fbe78f4f | aliguori | |
884 | 17a0ca55 | KONRAD Frederic | assert(vdev->vm_running); |
885 | 783e7706 | Michael S. Tsirkin | |
886 | 0c87e93e | Jason Wang | if (q->async_tx.elem.out_num) {
|
887 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 0);
|
888 | e3f30488 | Alex Williamson | return num_packets;
|
889 | 6243375f | Mark McLoughlin | } |
890 | 6243375f | Mark McLoughlin | |
891 | 0c87e93e | Jason Wang | while (virtqueue_pop(q->tx_vq, &elem)) {
|
892 | 14761f9c | Michael S. Tsirkin | ssize_t ret, len; |
893 | fbe78f4f | aliguori | unsigned int out_num = elem.out_num; |
894 | fbe78f4f | aliguori | struct iovec *out_sg = &elem.out_sg[0]; |
895 | 14761f9c | Michael S. Tsirkin | struct iovec sg[VIRTQUEUE_MAX_SIZE];
|
896 | fbe78f4f | aliguori | |
897 | 7b80d08e | Michael S. Tsirkin | if (out_num < 1) { |
898 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net header not in first element");
|
899 | fbe78f4f | aliguori | exit(1);
|
900 | fbe78f4f | aliguori | } |
901 | fbe78f4f | aliguori | |
902 | 14761f9c | Michael S. Tsirkin | /*
|
903 | 14761f9c | Michael S. Tsirkin | * If host wants to see the guest header as is, we can
|
904 | 14761f9c | Michael S. Tsirkin | * pass it on unchanged. Otherwise, copy just the parts
|
905 | 14761f9c | Michael S. Tsirkin | * that host is interested in.
|
906 | 14761f9c | Michael S. Tsirkin | */
|
907 | 14761f9c | Michael S. Tsirkin | assert(n->host_hdr_len <= n->guest_hdr_len); |
908 | 14761f9c | Michael S. Tsirkin | if (n->host_hdr_len != n->guest_hdr_len) {
|
909 | 14761f9c | Michael S. Tsirkin | unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg),
|
910 | 14761f9c | Michael S. Tsirkin | out_sg, out_num, |
911 | 14761f9c | Michael S. Tsirkin | 0, n->host_hdr_len);
|
912 | 14761f9c | Michael S. Tsirkin | sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, |
913 | 14761f9c | Michael S. Tsirkin | out_sg, out_num, |
914 | 14761f9c | Michael S. Tsirkin | n->guest_hdr_len, -1);
|
915 | 14761f9c | Michael S. Tsirkin | out_num = sg_num; |
916 | 14761f9c | Michael S. Tsirkin | out_sg = sg; |
917 | fbe78f4f | aliguori | } |
918 | fbe78f4f | aliguori | |
919 | 7b80d08e | Michael S. Tsirkin | len = n->guest_hdr_len; |
920 | 14761f9c | Michael S. Tsirkin | |
921 | fed699f9 | Jason Wang | ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), |
922 | fed699f9 | Jason Wang | out_sg, out_num, virtio_net_tx_complete); |
923 | 6243375f | Mark McLoughlin | if (ret == 0) { |
924 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 0);
|
925 | 0c87e93e | Jason Wang | q->async_tx.elem = elem; |
926 | 0c87e93e | Jason Wang | q->async_tx.len = len; |
927 | e3f30488 | Alex Williamson | return -EBUSY;
|
928 | 6243375f | Mark McLoughlin | } |
929 | 6243375f | Mark McLoughlin | |
930 | 6243375f | Mark McLoughlin | len += ret; |
931 | fbe78f4f | aliguori | |
932 | 0c87e93e | Jason Wang | virtqueue_push(q->tx_vq, &elem, 0);
|
933 | 17a0ca55 | KONRAD Frederic | virtio_notify(vdev, q->tx_vq); |
934 | e3f30488 | Alex Williamson | |
935 | e3f30488 | Alex Williamson | if (++num_packets >= n->tx_burst) {
|
936 | e3f30488 | Alex Williamson | break;
|
937 | e3f30488 | Alex Williamson | } |
938 | fbe78f4f | aliguori | } |
939 | e3f30488 | Alex Williamson | return num_packets;
|
940 | fbe78f4f | aliguori | } |
941 | fbe78f4f | aliguori | |
942 | a697a334 | Alex Williamson | static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) |
943 | fbe78f4f | aliguori | { |
944 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
945 | fed699f9 | Jason Wang | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
946 | fbe78f4f | aliguori | |
947 | 783e7706 | Michael S. Tsirkin | /* This happens when device was stopped but VCPU wasn't. */
|
948 | 17a0ca55 | KONRAD Frederic | if (!vdev->vm_running) {
|
949 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
950 | 783e7706 | Michael S. Tsirkin | return;
|
951 | 783e7706 | Michael S. Tsirkin | } |
952 | 783e7706 | Michael S. Tsirkin | |
953 | 0c87e93e | Jason Wang | if (q->tx_waiting) {
|
954 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 1);
|
955 | 0c87e93e | Jason Wang | qemu_del_timer(q->tx_timer); |
956 | 0c87e93e | Jason Wang | q->tx_waiting = 0;
|
957 | 0c87e93e | Jason Wang | virtio_net_flush_tx(q); |
958 | fbe78f4f | aliguori | } else {
|
959 | 0c87e93e | Jason Wang | qemu_mod_timer(q->tx_timer, |
960 | 74475455 | Paolo Bonzini | qemu_get_clock_ns(vm_clock) + n->tx_timeout); |
961 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
962 | fbe78f4f | aliguori | virtio_queue_set_notification(vq, 0);
|
963 | fbe78f4f | aliguori | } |
964 | fbe78f4f | aliguori | } |
965 | fbe78f4f | aliguori | |
966 | a697a334 | Alex Williamson | static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) |
967 | a697a334 | Alex Williamson | { |
968 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
969 | fed699f9 | Jason Wang | VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; |
970 | a697a334 | Alex Williamson | |
971 | 0c87e93e | Jason Wang | if (unlikely(q->tx_waiting)) {
|
972 | a697a334 | Alex Williamson | return;
|
973 | a697a334 | Alex Williamson | } |
974 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
975 | 783e7706 | Michael S. Tsirkin | /* This happens when device was stopped but VCPU wasn't. */
|
976 | 17a0ca55 | KONRAD Frederic | if (!vdev->vm_running) {
|
977 | 783e7706 | Michael S. Tsirkin | return;
|
978 | 783e7706 | Michael S. Tsirkin | } |
979 | a697a334 | Alex Williamson | virtio_queue_set_notification(vq, 0);
|
980 | 0c87e93e | Jason Wang | qemu_bh_schedule(q->tx_bh); |
981 | a697a334 | Alex Williamson | } |
982 | a697a334 | Alex Williamson | |
983 | fbe78f4f | aliguori | static void virtio_net_tx_timer(void *opaque) |
984 | fbe78f4f | aliguori | { |
985 | 0c87e93e | Jason Wang | VirtIONetQueue *q = opaque; |
986 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
987 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
988 | 17a0ca55 | KONRAD Frederic | assert(vdev->vm_running); |
989 | fbe78f4f | aliguori | |
990 | 0c87e93e | Jason Wang | q->tx_waiting = 0;
|
991 | fbe78f4f | aliguori | |
992 | fbe78f4f | aliguori | /* Just in case the driver is not ready on more */
|
993 | 17a0ca55 | KONRAD Frederic | if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
994 | fbe78f4f | aliguori | return;
|
995 | 17a0ca55 | KONRAD Frederic | } |
996 | fbe78f4f | aliguori | |
997 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 1);
|
998 | 0c87e93e | Jason Wang | virtio_net_flush_tx(q); |
999 | fbe78f4f | aliguori | } |
1000 | fbe78f4f | aliguori | |
1001 | a697a334 | Alex Williamson | static void virtio_net_tx_bh(void *opaque) |
1002 | a697a334 | Alex Williamson | { |
1003 | 0c87e93e | Jason Wang | VirtIONetQueue *q = opaque; |
1004 | 0c87e93e | Jason Wang | VirtIONet *n = q->n; |
1005 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
1006 | a697a334 | Alex Williamson | int32_t ret; |
1007 | a697a334 | Alex Williamson | |
1008 | 17a0ca55 | KONRAD Frederic | assert(vdev->vm_running); |
1009 | 783e7706 | Michael S. Tsirkin | |
1010 | 0c87e93e | Jason Wang | q->tx_waiting = 0;
|
1011 | a697a334 | Alex Williamson | |
1012 | a697a334 | Alex Williamson | /* Just in case the driver is not ready on more */
|
1013 | 17a0ca55 | KONRAD Frederic | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) {
|
1014 | a697a334 | Alex Williamson | return;
|
1015 | 17a0ca55 | KONRAD Frederic | } |
1016 | a697a334 | Alex Williamson | |
1017 | 0c87e93e | Jason Wang | ret = virtio_net_flush_tx(q); |
1018 | a697a334 | Alex Williamson | if (ret == -EBUSY) {
|
1019 | a697a334 | Alex Williamson | return; /* Notification re-enable handled by tx_complete */ |
1020 | a697a334 | Alex Williamson | } |
1021 | a697a334 | Alex Williamson | |
1022 | a697a334 | Alex Williamson | /* If we flush a full burst of packets, assume there are
|
1023 | a697a334 | Alex Williamson | * more coming and immediately reschedule */
|
1024 | a697a334 | Alex Williamson | if (ret >= n->tx_burst) {
|
1025 | 0c87e93e | Jason Wang | qemu_bh_schedule(q->tx_bh); |
1026 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
1027 | a697a334 | Alex Williamson | return;
|
1028 | a697a334 | Alex Williamson | } |
1029 | a697a334 | Alex Williamson | |
1030 | a697a334 | Alex Williamson | /* If less than a full burst, re-enable notification and flush
|
1031 | a697a334 | Alex Williamson | * anything that may have come in while we weren't looking. If
|
1032 | a697a334 | Alex Williamson | * we find something, assume the guest is still active and reschedule */
|
1033 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 1);
|
1034 | 0c87e93e | Jason Wang | if (virtio_net_flush_tx(q) > 0) { |
1035 | 0c87e93e | Jason Wang | virtio_queue_set_notification(q->tx_vq, 0);
|
1036 | 0c87e93e | Jason Wang | qemu_bh_schedule(q->tx_bh); |
1037 | 0c87e93e | Jason Wang | q->tx_waiting = 1;
|
1038 | a697a334 | Alex Williamson | } |
1039 | a697a334 | Alex Williamson | } |
1040 | a697a334 | Alex Williamson | |
1041 | fed699f9 | Jason Wang | static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue, int ctrl) |
1042 | fed699f9 | Jason Wang | { |
1043 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
1044 | fed699f9 | Jason Wang | int i, max = multiqueue ? n->max_queues : 1; |
1045 | fed699f9 | Jason Wang | |
1046 | fed699f9 | Jason Wang | n->multiqueue = multiqueue; |
1047 | fed699f9 | Jason Wang | |
1048 | fed699f9 | Jason Wang | for (i = 2; i <= n->max_queues * 2 + 1; i++) { |
1049 | fed699f9 | Jason Wang | virtio_del_queue(vdev, i); |
1050 | fed699f9 | Jason Wang | } |
1051 | fed699f9 | Jason Wang | |
1052 | fed699f9 | Jason Wang | for (i = 1; i < max; i++) { |
1053 | fed699f9 | Jason Wang | n->vqs[i].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx);
|
1054 | fed699f9 | Jason Wang | if (n->vqs[i].tx_timer) {
|
1055 | fed699f9 | Jason Wang | n->vqs[i].tx_vq = |
1056 | fed699f9 | Jason Wang | virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer);
|
1057 | fed699f9 | Jason Wang | n->vqs[i].tx_timer = qemu_new_timer_ns(vm_clock, |
1058 | fed699f9 | Jason Wang | virtio_net_tx_timer, |
1059 | fed699f9 | Jason Wang | &n->vqs[i]); |
1060 | fed699f9 | Jason Wang | } else {
|
1061 | fed699f9 | Jason Wang | n->vqs[i].tx_vq = |
1062 | fed699f9 | Jason Wang | virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh);
|
1063 | fed699f9 | Jason Wang | n->vqs[i].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[i]); |
1064 | fed699f9 | Jason Wang | } |
1065 | fed699f9 | Jason Wang | |
1066 | fed699f9 | Jason Wang | n->vqs[i].tx_waiting = 0;
|
1067 | fed699f9 | Jason Wang | n->vqs[i].n = n; |
1068 | fed699f9 | Jason Wang | } |
1069 | fed699f9 | Jason Wang | |
1070 | fed699f9 | Jason Wang | if (ctrl) {
|
1071 | fed699f9 | Jason Wang | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
|
1072 | fed699f9 | Jason Wang | } |
1073 | fed699f9 | Jason Wang | |
1074 | fed699f9 | Jason Wang | virtio_net_set_queues(n); |
1075 | fed699f9 | Jason Wang | } |
1076 | fed699f9 | Jason Wang | |
1077 | fbe78f4f | aliguori | static void virtio_net_save(QEMUFile *f, void *opaque) |
1078 | fbe78f4f | aliguori | { |
1079 | 5f800801 | Jason Wang | int i;
|
1080 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
1081 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
1082 | fbe78f4f | aliguori | |
1083 | afbaa7b4 | Michael S. Tsirkin | /* At this point, backend must be stopped, otherwise
|
1084 | afbaa7b4 | Michael S. Tsirkin | * it might keep writing to memory. */
|
1085 | afbaa7b4 | Michael S. Tsirkin | assert(!n->vhost_started); |
1086 | 17a0ca55 | KONRAD Frederic | virtio_save(vdev, f); |
1087 | fbe78f4f | aliguori | |
1088 | 79674068 | aliguori | qemu_put_buffer(f, n->mac, ETH_ALEN); |
1089 | 5f800801 | Jason Wang | qemu_put_be32(f, n->vqs[0].tx_waiting);
|
1090 | e46cb38f | aliguori | qemu_put_be32(f, n->mergeable_rx_bufs); |
1091 | 9d6271b8 | aliguori | qemu_put_be16(f, n->status); |
1092 | f10c592e | Alex Williamson | qemu_put_byte(f, n->promisc); |
1093 | f10c592e | Alex Williamson | qemu_put_byte(f, n->allmulti); |
1094 | b6503ed9 | aliguori | qemu_put_be32(f, n->mac_table.in_use); |
1095 | b6503ed9 | aliguori | qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); |
1096 | f21c0ed9 | aliguori | qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
1097 | 3a330134 | Mark McLoughlin | qemu_put_be32(f, n->has_vnet_hdr); |
1098 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.multi_overflow); |
1099 | 8fd2a2f1 | Alex Williamson | qemu_put_byte(f, n->mac_table.uni_overflow); |
1100 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->alluni); |
1101 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nomulti); |
1102 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nouni); |
1103 | 015cb166 | Alex Williamson | qemu_put_byte(f, n->nobcast); |
1104 | 0ce0e8f4 | Mark McLoughlin | qemu_put_byte(f, n->has_ufo); |
1105 | 5f800801 | Jason Wang | if (n->max_queues > 1) { |
1106 | 5f800801 | Jason Wang | qemu_put_be16(f, n->max_queues); |
1107 | 5f800801 | Jason Wang | qemu_put_be16(f, n->curr_queues); |
1108 | 5f800801 | Jason Wang | for (i = 1; i < n->curr_queues; i++) { |
1109 | 5f800801 | Jason Wang | qemu_put_be32(f, n->vqs[i].tx_waiting); |
1110 | 5f800801 | Jason Wang | } |
1111 | 5f800801 | Jason Wang | } |
1112 | fbe78f4f | aliguori | } |
1113 | fbe78f4f | aliguori | |
1114 | fbe78f4f | aliguori | static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
1115 | fbe78f4f | aliguori | { |
1116 | fbe78f4f | aliguori | VirtIONet *n = opaque; |
1117 | 17a0ca55 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(n); |
1118 | 5f800801 | Jason Wang | int ret, i, link_down;
|
1119 | fbe78f4f | aliguori | |
1120 | 9d6271b8 | aliguori | if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
1121 | fbe78f4f | aliguori | return -EINVAL;
|
1122 | fbe78f4f | aliguori | |
1123 | 17a0ca55 | KONRAD Frederic | ret = virtio_load(vdev, f); |
1124 | 2a633c46 | Orit Wassermann | if (ret) {
|
1125 | 2a633c46 | Orit Wassermann | return ret;
|
1126 | 2a633c46 | Orit Wassermann | } |
1127 | fbe78f4f | aliguori | |
1128 | 79674068 | aliguori | qemu_get_buffer(f, n->mac, ETH_ALEN); |
1129 | 5f800801 | Jason Wang | n->vqs[0].tx_waiting = qemu_get_be32(f);
|
1130 | ff3a8066 | Michael S. Tsirkin | |
1131 | ff3a8066 | Michael S. Tsirkin | virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f)); |
1132 | fbe78f4f | aliguori | |
1133 | 9d6271b8 | aliguori | if (version_id >= 3) |
1134 | 9d6271b8 | aliguori | n->status = qemu_get_be16(f); |
1135 | 9d6271b8 | aliguori | |
1136 | 002437cd | aliguori | if (version_id >= 4) { |
1137 | f10c592e | Alex Williamson | if (version_id < 8) { |
1138 | f10c592e | Alex Williamson | n->promisc = qemu_get_be32(f); |
1139 | f10c592e | Alex Williamson | n->allmulti = qemu_get_be32(f); |
1140 | f10c592e | Alex Williamson | } else {
|
1141 | f10c592e | Alex Williamson | n->promisc = qemu_get_byte(f); |
1142 | f10c592e | Alex Williamson | n->allmulti = qemu_get_byte(f); |
1143 | f10c592e | Alex Williamson | } |
1144 | 002437cd | aliguori | } |
1145 | 002437cd | aliguori | |
1146 | b6503ed9 | aliguori | if (version_id >= 5) { |
1147 | b6503ed9 | aliguori | n->mac_table.in_use = qemu_get_be32(f); |
1148 | b6503ed9 | aliguori | /* MAC_TABLE_ENTRIES may be different from the saved image */
|
1149 | b6503ed9 | aliguori | if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
|
1150 | b6503ed9 | aliguori | qemu_get_buffer(f, n->mac_table.macs, |
1151 | b6503ed9 | aliguori | n->mac_table.in_use * ETH_ALEN); |
1152 | b6503ed9 | aliguori | } else if (n->mac_table.in_use) { |
1153 | e398d61b | Juan Quintela | uint8_t *buf = g_malloc0(n->mac_table.in_use); |
1154 | e398d61b | Juan Quintela | qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN); |
1155 | e398d61b | Juan Quintela | g_free(buf); |
1156 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1;
|
1157 | b6503ed9 | aliguori | n->mac_table.in_use = 0;
|
1158 | b6503ed9 | aliguori | } |
1159 | b6503ed9 | aliguori | } |
1160 | b6503ed9 | aliguori | |
1161 | f21c0ed9 | aliguori | if (version_id >= 6) |
1162 | f21c0ed9 | aliguori | qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
|
1163 | f21c0ed9 | aliguori | |
1164 | 3a330134 | Mark McLoughlin | if (version_id >= 7) { |
1165 | 3a330134 | Mark McLoughlin | if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) {
|
1166 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires vnet_hdr=on");
|
1167 | 3a330134 | Mark McLoughlin | return -1; |
1168 | 3a330134 | Mark McLoughlin | } |
1169 | 3a330134 | Mark McLoughlin | |
1170 | 3a330134 | Mark McLoughlin | if (n->has_vnet_hdr) {
|
1171 | b356f76d | Jason Wang | tap_set_offload(qemu_get_queue(n->nic)->peer, |
1172 | 17a0ca55 | KONRAD Frederic | (vdev->guest_features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
|
1173 | 17a0ca55 | KONRAD Frederic | (vdev->guest_features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
|
1174 | 17a0ca55 | KONRAD Frederic | (vdev->guest_features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
|
1175 | 17a0ca55 | KONRAD Frederic | (vdev->guest_features >> VIRTIO_NET_F_GUEST_ECN) & 1,
|
1176 | 17a0ca55 | KONRAD Frederic | (vdev->guest_features >> VIRTIO_NET_F_GUEST_UFO) & 1);
|
1177 | 3a330134 | Mark McLoughlin | } |
1178 | 6c042c16 | Alex Williamson | } |
1179 | 6c042c16 | Alex Williamson | |
1180 | 8fd2a2f1 | Alex Williamson | if (version_id >= 9) { |
1181 | 8fd2a2f1 | Alex Williamson | n->mac_table.multi_overflow = qemu_get_byte(f); |
1182 | 8fd2a2f1 | Alex Williamson | n->mac_table.uni_overflow = qemu_get_byte(f); |
1183 | 8fd2a2f1 | Alex Williamson | } |
1184 | 8fd2a2f1 | Alex Williamson | |
1185 | 015cb166 | Alex Williamson | if (version_id >= 10) { |
1186 | 015cb166 | Alex Williamson | n->alluni = qemu_get_byte(f); |
1187 | 015cb166 | Alex Williamson | n->nomulti = qemu_get_byte(f); |
1188 | 015cb166 | Alex Williamson | n->nouni = qemu_get_byte(f); |
1189 | 015cb166 | Alex Williamson | n->nobcast = qemu_get_byte(f); |
1190 | 015cb166 | Alex Williamson | } |
1191 | 015cb166 | Alex Williamson | |
1192 | 0ce0e8f4 | Mark McLoughlin | if (version_id >= 11) { |
1193 | 0ce0e8f4 | Mark McLoughlin | if (qemu_get_byte(f) && !peer_has_ufo(n)) {
|
1194 | 1ecda02b | Markus Armbruster | error_report("virtio-net: saved image requires TUN_F_UFO support");
|
1195 | 0ce0e8f4 | Mark McLoughlin | return -1; |
1196 | 0ce0e8f4 | Mark McLoughlin | } |
1197 | 0ce0e8f4 | Mark McLoughlin | } |
1198 | 0ce0e8f4 | Mark McLoughlin | |
1199 | 5f800801 | Jason Wang | if (n->max_queues > 1) { |
1200 | 5f800801 | Jason Wang | if (n->max_queues != qemu_get_be16(f)) {
|
1201 | 5f800801 | Jason Wang | error_report("virtio-net: different max_queues ");
|
1202 | 5f800801 | Jason Wang | return -1; |
1203 | 5f800801 | Jason Wang | } |
1204 | 5f800801 | Jason Wang | |
1205 | 5f800801 | Jason Wang | n->curr_queues = qemu_get_be16(f); |
1206 | 5f800801 | Jason Wang | for (i = 1; i < n->curr_queues; i++) { |
1207 | 5f800801 | Jason Wang | n->vqs[i].tx_waiting = qemu_get_be32(f); |
1208 | 5f800801 | Jason Wang | } |
1209 | 5f800801 | Jason Wang | } |
1210 | 5f800801 | Jason Wang | |
1211 | 5f800801 | Jason Wang | virtio_net_set_queues(n); |
1212 | 5f800801 | Jason Wang | |
1213 | 2d9aba39 | Alex Williamson | /* Find the first multicast entry in the saved MAC filter */
|
1214 | 2d9aba39 | Alex Williamson | for (i = 0; i < n->mac_table.in_use; i++) { |
1215 | 2d9aba39 | Alex Williamson | if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
1216 | 2d9aba39 | Alex Williamson | break;
|
1217 | 2d9aba39 | Alex Williamson | } |
1218 | 2d9aba39 | Alex Williamson | } |
1219 | 2d9aba39 | Alex Williamson | n->mac_table.first_multi = i; |
1220 | 98991481 | Amos Kong | |
1221 | 98991481 | Amos Kong | /* nc.link_down can't be migrated, so infer link_down according
|
1222 | 98991481 | Amos Kong | * to link status bit in n->status */
|
1223 | 5f800801 | Jason Wang | link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0;
|
1224 | 5f800801 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
1225 | 5f800801 | Jason Wang | qemu_get_subqueue(n->nic, i)->link_down = link_down; |
1226 | 5f800801 | Jason Wang | } |
1227 | 98991481 | Amos Kong | |
1228 | fbe78f4f | aliguori | return 0; |
1229 | fbe78f4f | aliguori | } |
1230 | fbe78f4f | aliguori | |
1231 | 4e68f7a0 | Stefan Hajnoczi | static void virtio_net_cleanup(NetClientState *nc) |
1232 | b946a153 | aliguori | { |
1233 | cc1f0f45 | Jason Wang | VirtIONet *n = qemu_get_nic_opaque(nc); |
1234 | b946a153 | aliguori | |
1235 | eb6b6c12 | Mark McLoughlin | n->nic = NULL;
|
1236 | b946a153 | aliguori | } |
1237 | b946a153 | aliguori | |
1238 | eb6b6c12 | Mark McLoughlin | static NetClientInfo net_virtio_info = {
|
1239 | 2be64a68 | Laszlo Ersek | .type = NET_CLIENT_OPTIONS_KIND_NIC, |
1240 | eb6b6c12 | Mark McLoughlin | .size = sizeof(NICState),
|
1241 | eb6b6c12 | Mark McLoughlin | .can_receive = virtio_net_can_receive, |
1242 | eb6b6c12 | Mark McLoughlin | .receive = virtio_net_receive, |
1243 | eb6b6c12 | Mark McLoughlin | .cleanup = virtio_net_cleanup, |
1244 | eb6b6c12 | Mark McLoughlin | .link_status_changed = virtio_net_set_link_status, |
1245 | eb6b6c12 | Mark McLoughlin | }; |
1246 | eb6b6c12 | Mark McLoughlin | |
1247 | f56a1247 | Michael S. Tsirkin | static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) |
1248 | f56a1247 | Michael S. Tsirkin | { |
1249 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
1250 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
1251 | f56a1247 | Michael S. Tsirkin | assert(n->vhost_started); |
1252 | b356f76d | Jason Wang | return vhost_net_virtqueue_pending(tap_get_vhost_net(nc->peer), idx);
|
1253 | f56a1247 | Michael S. Tsirkin | } |
1254 | f56a1247 | Michael S. Tsirkin | |
1255 | f56a1247 | Michael S. Tsirkin | static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, |
1256 | f56a1247 | Michael S. Tsirkin | bool mask)
|
1257 | f56a1247 | Michael S. Tsirkin | { |
1258 | 17a0ca55 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
1259 | fed699f9 | Jason Wang | NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); |
1260 | f56a1247 | Michael S. Tsirkin | assert(n->vhost_started); |
1261 | b356f76d | Jason Wang | vhost_net_virtqueue_mask(tap_get_vhost_net(nc->peer), |
1262 | f56a1247 | Michael S. Tsirkin | vdev, idx, mask); |
1263 | f56a1247 | Michael S. Tsirkin | } |
1264 | f56a1247 | Michael S. Tsirkin | |
1265 | 17ec5a86 | KONRAD Frederic | void virtio_net_set_config_size(VirtIONet *n, uint32_t host_features)
|
1266 | fbe78f4f | aliguori | { |
1267 | 14f9b664 | Jesse Larrew | int i, config_size = 0; |
1268 | 14f9b664 | Jesse Larrew | for (i = 0; feature_sizes[i].flags != 0; i++) { |
1269 | 14f9b664 | Jesse Larrew | if (host_features & feature_sizes[i].flags) {
|
1270 | 14f9b664 | Jesse Larrew | config_size = MAX(feature_sizes[i].end, config_size); |
1271 | 14f9b664 | Jesse Larrew | } |
1272 | 14f9b664 | Jesse Larrew | } |
1273 | 17ec5a86 | KONRAD Frederic | n->config_size = config_size; |
1274 | 17ec5a86 | KONRAD Frederic | } |
1275 | 17ec5a86 | KONRAD Frederic | |
1276 | 1773d9ee | KONRAD Frederic | static int virtio_net_device_init(VirtIODevice *vdev) |
1277 | 17ec5a86 | KONRAD Frederic | { |
1278 | 1773d9ee | KONRAD Frederic | int i;
|
1279 | fbe78f4f | aliguori | |
1280 | 1773d9ee | KONRAD Frederic | DeviceState *qdev = DEVICE(vdev); |
1281 | 1773d9ee | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(vdev); |
1282 | 1773d9ee | KONRAD Frederic | |
1283 | 1773d9ee | KONRAD Frederic | virtio_init(VIRTIO_DEVICE(n), "virtio-net", VIRTIO_ID_NET,
|
1284 | 1773d9ee | KONRAD Frederic | n->config_size); |
1285 | fbe78f4f | aliguori | |
1286 | 17a0ca55 | KONRAD Frederic | vdev->get_config = virtio_net_get_config; |
1287 | 17a0ca55 | KONRAD Frederic | vdev->set_config = virtio_net_set_config; |
1288 | 17a0ca55 | KONRAD Frederic | vdev->get_features = virtio_net_get_features; |
1289 | 17a0ca55 | KONRAD Frederic | vdev->set_features = virtio_net_set_features; |
1290 | 17a0ca55 | KONRAD Frederic | vdev->bad_features = virtio_net_bad_features; |
1291 | 17a0ca55 | KONRAD Frederic | vdev->reset = virtio_net_reset; |
1292 | 17a0ca55 | KONRAD Frederic | vdev->set_status = virtio_net_set_status; |
1293 | 17a0ca55 | KONRAD Frederic | vdev->guest_notifier_mask = virtio_net_guest_notifier_mask; |
1294 | 17a0ca55 | KONRAD Frederic | vdev->guest_notifier_pending = virtio_net_guest_notifier_pending; |
1295 | 1773d9ee | KONRAD Frederic | n->max_queues = MAX(n->nic_conf.queues, 1);
|
1296 | f6b26cf2 | Jason Wang | n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues);
|
1297 | 17a0ca55 | KONRAD Frederic | n->vqs[0].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); |
1298 | fed699f9 | Jason Wang | n->curr_queues = 1;
|
1299 | fed699f9 | Jason Wang | n->vqs[0].n = n;
|
1300 | 1773d9ee | KONRAD Frederic | n->tx_timeout = n->net_conf.txtimer; |
1301 | a697a334 | Alex Williamson | |
1302 | 1773d9ee | KONRAD Frederic | if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") |
1303 | 1773d9ee | KONRAD Frederic | && strcmp(n->net_conf.tx, "bh")) {
|
1304 | e7b43f7e | Stefan Hajnoczi | error_report("virtio-net: "
|
1305 | e7b43f7e | Stefan Hajnoczi | "Unknown option tx=%s, valid options: \"timer\" \"bh\"",
|
1306 | 1773d9ee | KONRAD Frederic | n->net_conf.tx); |
1307 | e7b43f7e | Stefan Hajnoczi | error_report("Defaulting to \"bh\"");
|
1308 | a697a334 | Alex Williamson | } |
1309 | a697a334 | Alex Williamson | |
1310 | 1773d9ee | KONRAD Frederic | if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { |
1311 | 17a0ca55 | KONRAD Frederic | n->vqs[0].tx_vq = virtio_add_queue(vdev, 256, |
1312 | fed699f9 | Jason Wang | virtio_net_handle_tx_timer); |
1313 | fed699f9 | Jason Wang | n->vqs[0].tx_timer = qemu_new_timer_ns(vm_clock, virtio_net_tx_timer,
|
1314 | fed699f9 | Jason Wang | &n->vqs[0]);
|
1315 | a697a334 | Alex Williamson | } else {
|
1316 | 17a0ca55 | KONRAD Frederic | n->vqs[0].tx_vq = virtio_add_queue(vdev, 256, |
1317 | fed699f9 | Jason Wang | virtio_net_handle_tx_bh); |
1318 | fed699f9 | Jason Wang | n->vqs[0].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[0]); |
1319 | a697a334 | Alex Williamson | } |
1320 | 17a0ca55 | KONRAD Frederic | n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl);
|
1321 | 1773d9ee | KONRAD Frederic | qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); |
1322 | 1773d9ee | KONRAD Frederic | memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); |
1323 | 554c97dd | aliguori | n->status = VIRTIO_NET_S_LINK_UP; |
1324 | fbe78f4f | aliguori | |
1325 | 1773d9ee | KONRAD Frederic | n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, |
1326 | 1773d9ee | KONRAD Frederic | object_get_typename(OBJECT(qdev)), qdev->id, n); |
1327 | 6e371ab8 | Michael S. Tsirkin | peer_test_vnet_hdr(n); |
1328 | 6e371ab8 | Michael S. Tsirkin | if (peer_has_vnet_hdr(n)) {
|
1329 | fed699f9 | Jason Wang | for (i = 0; i < n->max_queues; i++) { |
1330 | fed699f9 | Jason Wang | tap_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true);
|
1331 | fed699f9 | Jason Wang | } |
1332 | 6e371ab8 | Michael S. Tsirkin | n->host_hdr_len = sizeof(struct virtio_net_hdr); |
1333 | 6e371ab8 | Michael S. Tsirkin | } else {
|
1334 | 6e371ab8 | Michael S. Tsirkin | n->host_hdr_len = 0;
|
1335 | 6e371ab8 | Michael S. Tsirkin | } |
1336 | eb6b6c12 | Mark McLoughlin | |
1337 | 1773d9ee | KONRAD Frederic | qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); |
1338 | 96d5e201 | aliguori | |
1339 | fed699f9 | Jason Wang | n->vqs[0].tx_waiting = 0; |
1340 | 1773d9ee | KONRAD Frederic | n->tx_burst = n->net_conf.txburst; |
1341 | ff3a8066 | Michael S. Tsirkin | virtio_net_set_mrg_rx_bufs(n, 0);
|
1342 | 002437cd | aliguori | n->promisc = 1; /* for compatibility */ |
1343 | fbe78f4f | aliguori | |
1344 | 7267c094 | Anthony Liguori | n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); |
1345 | b6503ed9 | aliguori | |
1346 | 7267c094 | Anthony Liguori | n->vlans = g_malloc0(MAX_VLAN >> 3);
|
1347 | f21c0ed9 | aliguori | |
1348 | 1773d9ee | KONRAD Frederic | n->qdev = qdev; |
1349 | 1773d9ee | KONRAD Frederic | register_savevm(qdev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, |
1350 | fbe78f4f | aliguori | virtio_net_save, virtio_net_load, n); |
1351 | cf21e106 | Paul Brook | |
1352 | 1773d9ee | KONRAD Frederic | add_boot_device_path(n->nic_conf.bootindex, qdev, "/ethernet-phy@0");
|
1353 | 17ec5a86 | KONRAD Frederic | return 0; |
1354 | 17ec5a86 | KONRAD Frederic | } |
1355 | 17ec5a86 | KONRAD Frederic | |
1356 | 17ec5a86 | KONRAD Frederic | static int virtio_net_device_exit(DeviceState *qdev) |
1357 | 17ec5a86 | KONRAD Frederic | { |
1358 | 17ec5a86 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(qdev); |
1359 | 17ec5a86 | KONRAD Frederic | VirtIODevice *vdev = VIRTIO_DEVICE(qdev); |
1360 | 17ec5a86 | KONRAD Frederic | int i;
|
1361 | 17ec5a86 | KONRAD Frederic | |
1362 | 17ec5a86 | KONRAD Frederic | /* This will stop vhost backend if appropriate. */
|
1363 | 17ec5a86 | KONRAD Frederic | virtio_net_set_status(vdev, 0);
|
1364 | 17ec5a86 | KONRAD Frederic | |
1365 | 17ec5a86 | KONRAD Frederic | unregister_savevm(qdev, "virtio-net", n);
|
1366 | 17ec5a86 | KONRAD Frederic | |
1367 | 17ec5a86 | KONRAD Frederic | g_free(n->mac_table.macs); |
1368 | 17ec5a86 | KONRAD Frederic | g_free(n->vlans); |
1369 | 17ec5a86 | KONRAD Frederic | |
1370 | 17ec5a86 | KONRAD Frederic | for (i = 0; i < n->max_queues; i++) { |
1371 | 17ec5a86 | KONRAD Frederic | VirtIONetQueue *q = &n->vqs[i]; |
1372 | 17ec5a86 | KONRAD Frederic | NetClientState *nc = qemu_get_subqueue(n->nic, i); |
1373 | 17ec5a86 | KONRAD Frederic | |
1374 | 17ec5a86 | KONRAD Frederic | qemu_purge_queued_packets(nc); |
1375 | 17ec5a86 | KONRAD Frederic | |
1376 | 17ec5a86 | KONRAD Frederic | if (q->tx_timer) {
|
1377 | 17ec5a86 | KONRAD Frederic | qemu_del_timer(q->tx_timer); |
1378 | 17ec5a86 | KONRAD Frederic | qemu_free_timer(q->tx_timer); |
1379 | 17ec5a86 | KONRAD Frederic | } else {
|
1380 | 17ec5a86 | KONRAD Frederic | qemu_bh_delete(q->tx_bh); |
1381 | 17ec5a86 | KONRAD Frederic | } |
1382 | 17ec5a86 | KONRAD Frederic | } |
1383 | 17ec5a86 | KONRAD Frederic | |
1384 | 17ec5a86 | KONRAD Frederic | g_free(n->vqs); |
1385 | 17ec5a86 | KONRAD Frederic | qemu_del_nic(n->nic); |
1386 | 17a0ca55 | KONRAD Frederic | virtio_common_cleanup(vdev); |
1387 | 17ec5a86 | KONRAD Frederic | |
1388 | 17ec5a86 | KONRAD Frederic | return 0; |
1389 | 17ec5a86 | KONRAD Frederic | } |
1390 | 17ec5a86 | KONRAD Frederic | |
1391 | 17ec5a86 | KONRAD Frederic | static void virtio_net_instance_init(Object *obj) |
1392 | 17ec5a86 | KONRAD Frederic | { |
1393 | 17ec5a86 | KONRAD Frederic | VirtIONet *n = VIRTIO_NET(obj); |
1394 | 17ec5a86 | KONRAD Frederic | |
1395 | 17ec5a86 | KONRAD Frederic | /*
|
1396 | 17ec5a86 | KONRAD Frederic | * The default config_size is sizeof(struct virtio_net_config).
|
1397 | 17ec5a86 | KONRAD Frederic | * Can be overriden with virtio_net_set_config_size.
|
1398 | 17ec5a86 | KONRAD Frederic | */
|
1399 | 17ec5a86 | KONRAD Frederic | n->config_size = sizeof(struct virtio_net_config); |
1400 | 17ec5a86 | KONRAD Frederic | } |
1401 | 17ec5a86 | KONRAD Frederic | |
1402 | 17ec5a86 | KONRAD Frederic | static Property virtio_net_properties[] = {
|
1403 | 17ec5a86 | KONRAD Frederic | DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), |
1404 | 17ec5a86 | KONRAD Frederic | DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer,
|
1405 | 17ec5a86 | KONRAD Frederic | TX_TIMER_INTERVAL), |
1406 | 17ec5a86 | KONRAD Frederic | DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST),
|
1407 | 17ec5a86 | KONRAD Frederic | DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx),
|
1408 | 17ec5a86 | KONRAD Frederic | DEFINE_PROP_END_OF_LIST(), |
1409 | 17ec5a86 | KONRAD Frederic | }; |
1410 | 17ec5a86 | KONRAD Frederic | |
1411 | 17ec5a86 | KONRAD Frederic | static void virtio_net_class_init(ObjectClass *klass, void *data) |
1412 | 17ec5a86 | KONRAD Frederic | { |
1413 | 17ec5a86 | KONRAD Frederic | DeviceClass *dc = DEVICE_CLASS(klass); |
1414 | 17ec5a86 | KONRAD Frederic | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
1415 | 17ec5a86 | KONRAD Frederic | dc->exit = virtio_net_device_exit; |
1416 | 17ec5a86 | KONRAD Frederic | dc->props = virtio_net_properties; |
1417 | 17ec5a86 | KONRAD Frederic | vdc->init = virtio_net_device_init; |
1418 | 17ec5a86 | KONRAD Frederic | vdc->get_config = virtio_net_get_config; |
1419 | 17ec5a86 | KONRAD Frederic | vdc->set_config = virtio_net_set_config; |
1420 | 17ec5a86 | KONRAD Frederic | vdc->get_features = virtio_net_get_features; |
1421 | 17ec5a86 | KONRAD Frederic | vdc->set_features = virtio_net_set_features; |
1422 | 17ec5a86 | KONRAD Frederic | vdc->bad_features = virtio_net_bad_features; |
1423 | 17ec5a86 | KONRAD Frederic | vdc->reset = virtio_net_reset; |
1424 | 17ec5a86 | KONRAD Frederic | vdc->set_status = virtio_net_set_status; |
1425 | 17ec5a86 | KONRAD Frederic | vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; |
1426 | 17ec5a86 | KONRAD Frederic | vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; |
1427 | 17ec5a86 | KONRAD Frederic | } |
1428 | 17ec5a86 | KONRAD Frederic | |
1429 | 17ec5a86 | KONRAD Frederic | static const TypeInfo virtio_net_info = { |
1430 | 17ec5a86 | KONRAD Frederic | .name = TYPE_VIRTIO_NET, |
1431 | 17ec5a86 | KONRAD Frederic | .parent = TYPE_VIRTIO_DEVICE, |
1432 | 17ec5a86 | KONRAD Frederic | .instance_size = sizeof(VirtIONet),
|
1433 | 17ec5a86 | KONRAD Frederic | .instance_init = virtio_net_instance_init, |
1434 | 17ec5a86 | KONRAD Frederic | .class_init = virtio_net_class_init, |
1435 | 17ec5a86 | KONRAD Frederic | }; |
1436 | 17ec5a86 | KONRAD Frederic | |
1437 | 17ec5a86 | KONRAD Frederic | static void virtio_register_types(void) |
1438 | 17ec5a86 | KONRAD Frederic | { |
1439 | 17ec5a86 | KONRAD Frederic | type_register_static(&virtio_net_info); |
1440 | 17ec5a86 | KONRAD Frederic | } |
1441 | 17ec5a86 | KONRAD Frederic | |
1442 | 17ec5a86 | KONRAD Frederic | type_init(virtio_register_types) |