| /* |
| * Virtio Network Device |
| * |
| * Copyright IBM, Corp. 2007 |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #include "virtio.h" |
| #include "net.h" |
| #include "qemu-timer.h" |
| #include "virtio-net.h" |
| |
| #define VIRTIO_NET_VM_VERSION 10 |
| |
| #define MAC_TABLE_ENTRIES 64 |
| #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ |
| |
| typedef struct VirtIONet |
| { |
| VirtIODevice vdev; |
| 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; |
| struct { |
| VirtQueueElement elem; |
| ssize_t len; |
| } async_tx; |
| int mergeable_rx_bufs; |
| uint8_t promisc; |
| uint8_t allmulti; |
| uint8_t alluni; |
| uint8_t nomulti; |
| uint8_t nouni; |
| uint8_t nobcast; |
| struct { |
| int in_use; |
| int first_multi; |
| uint8_t multi_overflow; |
| uint8_t uni_overflow; |
| uint8_t *macs; |
| } mac_table; |
| uint32_t *vlans; |
| } VirtIONet; |
| |
| /* TODO |
| * - we could suppress RX interrupt if we were so inclined. |
| */ |
| |
| static VirtIONet *to_virtio_net(VirtIODevice *vdev) |
| { |
| return (VirtIONet *)vdev; |
| } |
| |
| static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) |
| { |
| VirtIONet *n = to_virtio_net(vdev); |
| struct virtio_net_config netcfg; |
| |
| 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; |
| n->alluni = 0; |
| n->nomulti = 0; |
| n->nouni = 0; |
| n->nobcast = 0; |
| |
| /* Flush any MAC and VLAN filter table state */ |
| n->mac_table.in_use = 0; |
| n->mac_table.first_multi = 0; |
| n->mac_table.multi_overflow = 0; |
| n->mac_table.uni_overflow = 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) | |
| (1 << VIRTIO_NET_F_MRG_RXBUF) | |
| (1 << VIRTIO_NET_F_STATUS) | |
| (1 << VIRTIO_NET_F_CTRL_VQ) | |
| (1 << VIRTIO_NET_F_CTRL_RX) | |
| (1 << VIRTIO_NET_F_CTRL_VLAN) | |
| (1 << VIRTIO_NET_F_CTRL_RX_EXTRA); |
| |
| 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 if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI) |
| n->alluni = on; |
| else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI) |
| n->nomulti = on; |
| else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI) |
| n->nouni = on; |
| else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST) |
| n->nobcast = 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; |
| n->mac_table.first_multi = 0; |
| n->mac_table.uni_overflow = 0; |
| n->mac_table.multi_overflow = 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->mac_table.uni_overflow = 1; |
| } |
| |
| n->mac_table.first_multi = n->mac_table.in_use; |
| |
| 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->mac_table.multi_overflow = 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) |
| { |
| if (!virtio_queue_ready(n->rx_vq) || |
| !(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
| return 0; |
| |
| if (virtio_queue_empty(n->rx_vq) || |
| (n->mergeable_rx_bufs && |
| !virtqueue_avail_bytes(n->rx_vq, bufsize, 0))) { |
| virtio_queue_set_notification(n->rx_vq, 1); |
| return 0; |
| } |
| |
| virtio_queue_set_notification(n->rx_vq, 0); |
| return 1; |
| } |
| |
| static int virtio_net_can_receive(VLANClientState *vc) |
| { |
| VirtIONet *n = vc->opaque; |
| |
| return do_virtio_net_can_receive(n, VIRTIO_NET_MAX_BUFSIZE); |
| } |
| |
| static int iov_fill(struct iovec *iov, int iovcnt, const void *buf, int count) |
| { |
| int offset, i; |
| |
| offset = i = 0; |
| while (offset < count && i < iovcnt) { |
| int len = MIN(iov[i].iov_len, count - offset); |
| memcpy(iov[i].iov_base, buf + offset, len); |
| offset += len; |
| i++; |
| } |
| |
| return offset; |
| } |
| |
| 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 = (struct virtio_net_hdr *)iov[0].iov_base; |
| int offset = 0; |
| |
| hdr->flags = 0; |
| hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE; |
| |
| /* We only ever receive a struct virtio_net_hdr from the tapfd, |
| * but we may be passing along a larger header to the guest. |
| */ |
| iov[0].iov_base += hdr_len; |
| iov[0].iov_len -= hdr_len; |
| |
| return offset; |
| } |
| |
| static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) |
| { |
| 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 !n->nobcast; |
| } else if (n->nomulti) { |
| return 0; |
| } else if (n->allmulti || n->mac_table.multi_overflow) { |
| return 1; |
| } |
| |
| for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { |
| if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { |
| return 1; |
| } |
| } |
| } else { // unicast |
| if (n->nouni) { |
| return 0; |
| } else if (n->alluni || n->mac_table.uni_overflow) { |
| return 1; |
| } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { |
| return 1; |
| } |
| |
| for (i = 0; i < n->mac_table.first_multi; 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 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 ? |
| sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr); |
| |
| offset = i = 0; |
| |
| while (offset < size) { |
| VirtQueueElement elem; |
| int len, total; |
| struct iovec sg[VIRTQUEUE_MAX_SIZE]; |
| |
| len = total = 0; |
| |
| if ((i != 0 && !n->mergeable_rx_bufs) || |
| virtqueue_pop(n->rx_vq, &elem) == 0) { |
| if (i == 0) |
| return -1; |
| fprintf(stderr, "virtio-net truncating packet\n"); |
| exit(1); |
| } |
| |
| if (elem.in_num < 1) { |
| fprintf(stderr, "virtio-net receive queue contains no in buffers\n"); |
| exit(1); |
| } |
| |
| if (!n->mergeable_rx_bufs && elem.in_sg[0].iov_len != hdr_len) { |
| fprintf(stderr, "virtio-net header not in first element\n"); |
| exit(1); |
| } |
| |
| memcpy(&sg, &elem.in_sg[0], sizeof(sg[0]) * elem.in_num); |
| |
| if (i == 0) { |
| if (n->mergeable_rx_bufs) |
| mhdr = (struct virtio_net_hdr_mrg_rxbuf *)sg[0].iov_base; |
| |
| offset += receive_header(n, sg, elem.in_num, |
| buf + offset, size - offset, hdr_len); |
| total += hdr_len; |
| } |
| |
| /* copy in packet. ugh */ |
| len = iov_fill(sg, elem.in_num, |
| buf + offset, size - offset); |
| total += len; |
| |
| /* signal other side */ |
| virtqueue_fill(n->rx_vq, &elem, total, i++); |
| |
| offset += len; |
| } |
| |
| if (mhdr) |
| mhdr->num_buffers = i; |
| |
| virtqueue_flush(n->rx_vq, i); |
| virtio_notify(&n->vdev, n->rx_vq); |
| |
| return size; |
| } |
| |
| static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq); |
| |
| static void virtio_net_tx_complete(VLANClientState *vc, ssize_t len) |
| { |
| VirtIONet *n = vc->opaque; |
| |
| virtqueue_push(n->tx_vq, &n->async_tx.elem, n->async_tx.len); |
| virtio_notify(&n->vdev, n->tx_vq); |
| |
| n->async_tx.elem.out_num = n->async_tx.len = 0; |
| |
| virtio_queue_set_notification(n->tx_vq, 1); |
| virtio_net_flush_tx(n, n->tx_vq); |
| } |
| |
| /* TX */ |
| static void virtio_net_flush_tx(VirtIONet *n, VirtQueue *vq) |
| { |
| VirtQueueElement elem; |
| int has_vnet_hdr = 0; |
| |
| if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
| return; |
| |
| if (n->async_tx.elem.out_num) { |
| virtio_queue_set_notification(n->tx_vq, 0); |
| return; |
| } |
| |
| while (virtqueue_pop(vq, &elem)) { |
| ssize_t ret, len = 0; |
| unsigned int out_num = elem.out_num; |
| struct iovec *out_sg = &elem.out_sg[0]; |
| unsigned hdr_len; |
| |
| /* hdr_len refers to the header received from the guest */ |
| hdr_len = n->mergeable_rx_bufs ? |
| sizeof(struct virtio_net_hdr_mrg_rxbuf) : |
| sizeof(struct virtio_net_hdr); |
| |
| if (out_num < 1 || out_sg->iov_len != hdr_len) { |
| fprintf(stderr, "virtio-net header not in first element\n"); |
| exit(1); |
| } |
| |
| /* ignore the header if GSO is not supported */ |
| if (!has_vnet_hdr) { |
| out_num--; |
| out_sg++; |
| len += hdr_len; |
| } else if (n->mergeable_rx_bufs) { |
| /* tapfd expects a struct virtio_net_hdr */ |
| hdr_len -= sizeof(struct virtio_net_hdr); |
| out_sg->iov_len -= hdr_len; |
| len += hdr_len; |
| } |
| |
| ret = qemu_sendv_packet_async(n->vc, out_sg, out_num, |
| virtio_net_tx_complete); |
| if (ret == 0) { |
| virtio_queue_set_notification(n->tx_vq, 0); |
| n->async_tx.elem = elem; |
| n->async_tx.len = len; |
| return; |
| } |
| |
| len += ret; |
| |
| virtqueue_push(vq, &elem, len); |
| virtio_notify(&n->vdev, vq); |
| } |
| } |
| |
| static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq) |
| { |
| VirtIONet *n = to_virtio_net(vdev); |
| |
| if (n->tx_timer_active) { |
| virtio_queue_set_notification(vq, 1); |
| qemu_del_timer(n->tx_timer); |
| n->tx_timer_active = 0; |
| virtio_net_flush_tx(n, vq); |
| } else { |
| qemu_mod_timer(n->tx_timer, |
| qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
| n->tx_timer_active = 1; |
| virtio_queue_set_notification(vq, 0); |
| } |
| } |
| |
| static void virtio_net_tx_timer(void *opaque) |
| { |
| VirtIONet *n = opaque; |
| |
| n->tx_timer_active = 0; |
| |
| /* Just in case the driver is not ready on more */ |
| if (!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK)) |
| return; |
| |
| virtio_queue_set_notification(n->tx_vq, 1); |
| virtio_net_flush_tx(n, n->tx_vq); |
| } |
| |
| static void virtio_net_save(QEMUFile *f, void *opaque) |
| { |
| VirtIONet *n = opaque; |
| |
| virtio_save(&n->vdev, f); |
| |
| 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 */ |
| qemu_put_byte(f, n->mac_table.multi_overflow); |
| qemu_put_byte(f, n->mac_table.uni_overflow); |
| qemu_put_byte(f, n->alluni); |
| qemu_put_byte(f, n->nomulti); |
| qemu_put_byte(f, n->nouni); |
| qemu_put_byte(f, n->nobcast); |
| } |
| |
| static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) |
| { |
| VirtIONet *n = opaque; |
| int i; |
| |
| if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) |
| return -EINVAL; |
| |
| virtio_load(&n->vdev, f); |
| |
| 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->mac_table.multi_overflow = n->mac_table.uni_overflow = 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 (version_id >= 9) { |
| n->mac_table.multi_overflow = qemu_get_byte(f); |
| n->mac_table.uni_overflow = qemu_get_byte(f); |
| } |
| |
| if (version_id >= 10) { |
| n->alluni = qemu_get_byte(f); |
| n->nomulti = qemu_get_byte(f); |
| n->nouni = qemu_get_byte(f); |
| n->nobcast = qemu_get_byte(f); |
| } |
| |
| /* Find the first multicast entry in the saved MAC filter */ |
| for (i = 0; i < n->mac_table.in_use; i++) { |
| if (n->mac_table.macs[i * ETH_ALEN] & 1) { |
| break; |
| } |
| } |
| n->mac_table.first_multi = i; |
| |
| if (n->tx_timer_active) { |
| qemu_mod_timer(n->tx_timer, |
| qemu_get_clock(vm_clock) + TX_TIMER_INTERVAL); |
| } |
| |
| return 0; |
| } |
| |
| static void virtio_net_cleanup(VLANClientState *vc) |
| { |
| VirtIONet *n = vc->opaque; |
| |
| qemu_purge_queued_packets(vc); |
| |
| 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_common_init("virtio-net", VIRTIO_ID_NET, |
| sizeof(struct virtio_net_config), |
| sizeof(VirtIONet)); |
| |
| 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); |
| n->ctrl_vq = virtio_add_queue(&n->vdev, 64, 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); |
| if (dev->nd->nvectors == NIC_NVECTORS_UNSPECIFIED) |
| n->vdev.nvectors = 3; |
| else |
| n->vdev.nvectors = dev->nd->nvectors; |
| |
| register_savevm("virtio-net", virtio_net_id++, VIRTIO_NET_VM_VERSION, |
| virtio_net_save, virtio_net_load, n); |
| |
| return &n->vdev; |
| } |