#include "qemu-timer.h"
#include "virtio-net.h"
+#define VIRTIO_NET_VM_VERSION 8
+
+#define MAC_TABLE_ENTRIES 32
+#define MAX_VLAN (1 << 12) /* Per 802.1Q definition */
+
typedef struct VirtIONet
{
VirtIODevice vdev;
- uint8_t mac[6];
+ uint8_t mac[ETH_ALEN];
+ uint16_t status;
VirtQueue *rx_vq;
VirtQueue *tx_vq;
+ VirtQueue *ctrl_vq;
VLANClientState *vc;
QEMUTimer *tx_timer;
int tx_timer_active;
int mergeable_rx_bufs;
+ uint8_t promisc;
+ uint8_t allmulti;
+ struct {
+ int in_use;
+ uint8_t *macs;
+ } mac_table;
+ uint32_t *vlans;
} VirtIONet;
/* TODO
return (VirtIONet *)vdev;
}
-static void virtio_net_update_config(VirtIODevice *vdev, uint8_t *config)
+static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config)
{
VirtIONet *n = to_virtio_net(vdev);
struct virtio_net_config netcfg;
- memcpy(netcfg.mac, n->mac, 6);
+ netcfg.status = n->status;
+ memcpy(netcfg.mac, n->mac, ETH_ALEN);
memcpy(config, &netcfg, sizeof(netcfg));
}
+static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config)
+{
+ VirtIONet *n = to_virtio_net(vdev);
+ struct virtio_net_config netcfg;
+
+ memcpy(&netcfg, config, sizeof(netcfg));
+
+ if (memcmp(netcfg.mac, n->mac, ETH_ALEN)) {
+ memcpy(n->mac, netcfg.mac, ETH_ALEN);
+ qemu_format_nic_info_str(n->vc, n->mac);
+ }
+}
+
+static void virtio_net_set_link_status(VLANClientState *vc)
+{
+ VirtIONet *n = vc->opaque;
+ uint16_t old_status = n->status;
+
+ if (vc->link_down)
+ n->status &= ~VIRTIO_NET_S_LINK_UP;
+ else
+ n->status |= VIRTIO_NET_S_LINK_UP;
+
+ if (n->status != old_status)
+ virtio_notify_config(&n->vdev);
+}
+
+static void virtio_net_reset(VirtIODevice *vdev)
+{
+ VirtIONet *n = to_virtio_net(vdev);
+
+ /* Reset back to compatibility mode */
+ n->promisc = 1;
+ n->allmulti = 0;
+
+ /* Flush any MAC and VLAN filter table state */
+ n->mac_table.in_use = 0;
+ memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
+ memset(n->vlans, 0, MAX_VLAN >> 3);
+}
+
static uint32_t virtio_net_get_features(VirtIODevice *vdev)
{
- uint32_t features = (1 << VIRTIO_NET_F_MAC);
+ uint32_t features = (1 << VIRTIO_NET_F_MAC) |
+ (1 << VIRTIO_NET_F_STATUS) |
+ (1 << VIRTIO_NET_F_CTRL_VQ) |
+ (1 << VIRTIO_NET_F_CTRL_RX) |
+ (1 << VIRTIO_NET_F_CTRL_VLAN);
return features;
}
+static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
+{
+ uint32_t features = 0;
+
+ /* Linux kernel 2.6.25. It understood MAC (as everyone must),
+ * but also these: */
+ features |= (1 << VIRTIO_NET_F_MAC);
+ features |= (1 << VIRTIO_NET_F_GUEST_CSUM);
+ features |= (1 << VIRTIO_NET_F_GUEST_TSO4);
+ features |= (1 << VIRTIO_NET_F_GUEST_TSO6);
+ features |= (1 << VIRTIO_NET_F_GUEST_ECN);
+
+ return features & virtio_net_get_features(vdev);
+}
+
static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features)
{
VirtIONet *n = to_virtio_net(vdev);
n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
}
+static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
+ VirtQueueElement *elem)
+{
+ uint8_t on;
+
+ if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(on)) {
+ fprintf(stderr, "virtio-net ctrl invalid rx mode command\n");
+ exit(1);
+ }
+
+ on = ldub_p(elem->out_sg[1].iov_base);
+
+ if (cmd == VIRTIO_NET_CTRL_RX_MODE_PROMISC)
+ n->promisc = on;
+ else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI)
+ n->allmulti = on;
+ else
+ return VIRTIO_NET_ERR;
+
+ return VIRTIO_NET_OK;
+}
+
+static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
+ VirtQueueElement *elem)
+{
+ struct virtio_net_ctrl_mac mac_data;
+
+ if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET || elem->out_num != 3 ||
+ elem->out_sg[1].iov_len < sizeof(mac_data) ||
+ elem->out_sg[2].iov_len < sizeof(mac_data))
+ return VIRTIO_NET_ERR;
+
+ n->mac_table.in_use = 0;
+ memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN);
+
+ mac_data.entries = ldl_le_p(elem->out_sg[1].iov_base);
+
+ if (sizeof(mac_data.entries) +
+ (mac_data.entries * ETH_ALEN) > elem->out_sg[1].iov_len)
+ return VIRTIO_NET_ERR;
+
+ if (mac_data.entries <= MAC_TABLE_ENTRIES) {
+ memcpy(n->mac_table.macs, elem->out_sg[1].iov_base + sizeof(mac_data),
+ mac_data.entries * ETH_ALEN);
+ n->mac_table.in_use += mac_data.entries;
+ } else {
+ n->promisc = 1;
+ return VIRTIO_NET_OK;
+ }
+
+ mac_data.entries = ldl_le_p(elem->out_sg[2].iov_base);
+
+ if (sizeof(mac_data.entries) +
+ (mac_data.entries * ETH_ALEN) > elem->out_sg[2].iov_len)
+ return VIRTIO_NET_ERR;
+
+ if (mac_data.entries) {
+ if (n->mac_table.in_use + mac_data.entries <= MAC_TABLE_ENTRIES) {
+ memcpy(n->mac_table.macs + (n->mac_table.in_use * ETH_ALEN),
+ elem->out_sg[2].iov_base + sizeof(mac_data),
+ mac_data.entries * ETH_ALEN);
+ n->mac_table.in_use += mac_data.entries;
+ } else
+ n->allmulti = 1;
+ }
+
+ return VIRTIO_NET_OK;
+}
+
+static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd,
+ VirtQueueElement *elem)
+{
+ uint16_t vid;
+
+ if (elem->out_num != 2 || elem->out_sg[1].iov_len != sizeof(vid)) {
+ fprintf(stderr, "virtio-net ctrl invalid vlan command\n");
+ return VIRTIO_NET_ERR;
+ }
+
+ vid = lduw_le_p(elem->out_sg[1].iov_base);
+
+ if (vid >= MAX_VLAN)
+ return VIRTIO_NET_ERR;
+
+ if (cmd == VIRTIO_NET_CTRL_VLAN_ADD)
+ n->vlans[vid >> 5] |= (1U << (vid & 0x1f));
+ else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL)
+ n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f));
+ else
+ return VIRTIO_NET_ERR;
+
+ return VIRTIO_NET_OK;
+}
+
+static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
+{
+ VirtIONet *n = to_virtio_net(vdev);
+ struct virtio_net_ctrl_hdr ctrl;
+ virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
+ VirtQueueElement elem;
+
+ while (virtqueue_pop(vq, &elem)) {
+ if ((elem.in_num < 1) || (elem.out_num < 1)) {
+ fprintf(stderr, "virtio-net ctrl missing headers\n");
+ exit(1);
+ }
+
+ if (elem.out_sg[0].iov_len < sizeof(ctrl) ||
+ elem.in_sg[elem.in_num - 1].iov_len < sizeof(status)) {
+ fprintf(stderr, "virtio-net ctrl header not in correct element\n");
+ exit(1);
+ }
+
+ ctrl.class = ldub_p(elem.out_sg[0].iov_base);
+ ctrl.cmd = ldub_p(elem.out_sg[0].iov_base + sizeof(ctrl.class));
+
+ if (ctrl.class == VIRTIO_NET_CTRL_RX_MODE)
+ status = virtio_net_handle_rx_mode(n, ctrl.cmd, &elem);
+ else if (ctrl.class == VIRTIO_NET_CTRL_MAC)
+ status = virtio_net_handle_mac(n, ctrl.cmd, &elem);
+ else if (ctrl.class == VIRTIO_NET_CTRL_VLAN)
+ status = virtio_net_handle_vlan_table(n, ctrl.cmd, &elem);
+
+ stb_p(elem.in_sg[elem.in_num - 1].iov_base, status);
+
+ virtqueue_push(vq, &elem, sizeof(status));
+ virtio_notify(vdev, vq);
+ }
+}
+
/* RX */
static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq)
{
+ VirtIONet *n = to_virtio_net(vdev);
+
+ qemu_flush_queued_packets(n->vc);
}
static int do_virtio_net_can_receive(VirtIONet *n, int bufsize)
return 1;
}
-static int virtio_net_can_receive(void *opaque)
+static int virtio_net_can_receive(VLANClientState *vc)
{
- VirtIONet *n = opaque;
+ VirtIONet *n = vc->opaque;
return do_virtio_net_can_receive(n, VIRTIO_NET_MAX_BUFSIZE);
}
static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt,
const void *buf, size_t size, size_t hdr_len)
{
- struct virtio_net_hdr *hdr = iov[0].iov_base;
+ struct virtio_net_hdr *hdr = (struct virtio_net_hdr *)iov[0].iov_base;
int offset = 0;
hdr->flags = 0;
return offset;
}
-static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
+static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
{
- VirtIONet *n = opaque;
+ static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+ static const uint8_t vlan[] = {0x81, 0x00};
+ uint8_t *ptr = (uint8_t *)buf;
+ int i;
+
+ if (n->promisc)
+ return 1;
+
+ if (!memcmp(&ptr[12], vlan, sizeof(vlan))) {
+ int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff;
+ if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f))))
+ return 0;
+ }
+
+ if (ptr[0] & 1) { // multicast
+ if (!memcmp(ptr, bcast, sizeof(bcast))) {
+ return 1;
+ } else if (n->allmulti) {
+ return 1;
+ }
+ } else { // unicast
+ if (!memcmp(ptr, n->mac, ETH_ALEN)) {
+ return 1;
+ }
+ }
+
+ for (i = 0; i < n->mac_table.in_use; i++) {
+ if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN))
+ return 1;
+ }
+
+ return 0;
+}
+
+static ssize_t virtio_net_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
+{
+ VirtIONet *n = vc->opaque;
struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL;
size_t hdr_len, offset, i;
if (!do_virtio_net_can_receive(n, size))
- return;
+ return 0;
+
+ if (!receive_filter(n, buf, size))
+ return size;
/* hdr_len refers to the header we supply to the guest */
hdr_len = n->mergeable_rx_bufs ?
if ((i != 0 && !n->mergeable_rx_bufs) ||
virtqueue_pop(n->rx_vq, &elem) == 0) {
if (i == 0)
- return;
+ return -1;
fprintf(stderr, "virtio-net truncating packet\n");
exit(1);
}
virtqueue_flush(n->rx_vq, i);
virtio_notify(&n->vdev, n->rx_vq);
+
+ return size;
}
/* TX */
virtio_save(&n->vdev, f);
- qemu_put_buffer(f, n->mac, 6);
+ qemu_put_buffer(f, n->mac, ETH_ALEN);
qemu_put_be32(f, n->tx_timer_active);
+ qemu_put_be32(f, n->mergeable_rx_bufs);
+ qemu_put_be16(f, n->status);
+ qemu_put_byte(f, n->promisc);
+ qemu_put_byte(f, n->allmulti);
+ qemu_put_be32(f, n->mac_table.in_use);
+ qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN);
+ qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
+ qemu_put_be32(f, 0); /* vnet-hdr placeholder */
}
static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
{
VirtIONet *n = opaque;
- if (version_id != 1)
+ if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION)
return -EINVAL;
virtio_load(&n->vdev, f);
- qemu_get_buffer(f, n->mac, 6);
+ qemu_get_buffer(f, n->mac, ETH_ALEN);
n->tx_timer_active = qemu_get_be32(f);
+ n->mergeable_rx_bufs = qemu_get_be32(f);
+
+ if (version_id >= 3)
+ n->status = qemu_get_be16(f);
+
+ if (version_id >= 4) {
+ if (version_id < 8) {
+ n->promisc = qemu_get_be32(f);
+ n->allmulti = qemu_get_be32(f);
+ } else {
+ n->promisc = qemu_get_byte(f);
+ n->allmulti = qemu_get_byte(f);
+ }
+ }
+
+ if (version_id >= 5) {
+ n->mac_table.in_use = qemu_get_be32(f);
+ /* MAC_TABLE_ENTRIES may be different from the saved image */
+ if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) {
+ qemu_get_buffer(f, n->mac_table.macs,
+ n->mac_table.in_use * ETH_ALEN);
+ } else if (n->mac_table.in_use) {
+ qemu_fseek(f, n->mac_table.in_use * ETH_ALEN, SEEK_CUR);
+ n->promisc = 1;
+ n->mac_table.in_use = 0;
+ }
+ }
+
+ if (version_id >= 6)
+ qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3);
+
+ if (version_id >= 7 && qemu_get_be32(f)) {
+ fprintf(stderr,
+ "virtio-net: saved image requires vnet header support\n");
+ exit(1);
+ }
if (n->tx_timer_active) {
qemu_mod_timer(n->tx_timer,
return 0;
}
-PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn)
+static void virtio_net_cleanup(VLANClientState *vc)
+{
+ VirtIONet *n = vc->opaque;
+
+ unregister_savevm("virtio-net", n);
+
+ qemu_free(n->mac_table.macs);
+ qemu_free(n->vlans);
+
+ qemu_del_timer(n->tx_timer);
+ qemu_free_timer(n->tx_timer);
+
+ virtio_cleanup(&n->vdev);
+}
+
+VirtIODevice *virtio_net_init(DeviceState *dev)
{
VirtIONet *n;
static int virtio_net_id;
- n = (VirtIONet *)virtio_init_pci(bus, "virtio-net", 6900, 0x1000,
- 0, VIRTIO_ID_NET,
- 0x02, 0x00, 0x00,
- 6, sizeof(VirtIONet));
- if (!n)
- return NULL;
+ n = (VirtIONet *)virtio_common_init("virtio-net", VIRTIO_ID_NET,
+ sizeof(struct virtio_net_config),
+ sizeof(VirtIONet));
- n->vdev.get_config = virtio_net_update_config;
+ n->vdev.get_config = virtio_net_get_config;
+ n->vdev.set_config = virtio_net_set_config;
n->vdev.get_features = virtio_net_get_features;
n->vdev.set_features = virtio_net_set_features;
+ n->vdev.bad_features = virtio_net_bad_features;
+ n->vdev.reset = virtio_net_reset;
n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
- memcpy(n->mac, nd->macaddr, 6);
- n->vc = qemu_new_vlan_client(nd->vlan, nd->model,
- virtio_net_receive, virtio_net_can_receive, n);
+ n->ctrl_vq = virtio_add_queue(&n->vdev, 16, virtio_net_handle_ctrl);
+ qdev_get_macaddr(dev, n->mac);
+ n->status = VIRTIO_NET_S_LINK_UP;
+ n->vc = qdev_get_vlan_client(dev,
+ virtio_net_can_receive,
+ virtio_net_receive, NULL,
+ virtio_net_cleanup, n);
+ n->vc->link_status_changed = virtio_net_set_link_status;
+
+ qemu_format_nic_info_str(n->vc, n->mac);
n->tx_timer = qemu_new_timer(vm_clock, virtio_net_tx_timer, n);
n->tx_timer_active = 0;
n->mergeable_rx_bufs = 0;
+ n->promisc = 1; /* for compatibility */
+
+ n->mac_table.macs = qemu_mallocz(MAC_TABLE_ENTRIES * ETH_ALEN);
+
+ n->vlans = qemu_mallocz(MAX_VLAN >> 3);
- register_savevm("virtio-net", virtio_net_id++, 1,
+ register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION,
virtio_net_save, virtio_net_load, n);
- return (PCIDevice *)n;
+ return &n->vdev;
}
projects / qemu / blobdiff