/* * This file is part of the Palacios Virtual Machine Monitor developed * by the V3VEE Project with funding from the United States National * Science Foundation and the Department of Energy. * * The V3VEE Project is a joint project between Northwestern University * and the University of New Mexico. You can find out more at * http://www.v3vee.org * * Copyright (c) 2008, Lei Xia * Copyright (c) 2008, The V3VEE Project * All rights reserved. * * Author: Lei Xia * * * This is free software. You are permitted to use, * redistribute, and modify it as specified in the file "V3VEE_LICENSE". */ //backend device for Virtio NIC #include #include #include #include #include #include #ifndef CONFIG_DEBUG_VNET_NIC #undef PrintDebug #define PrintDebug(fmt, args...) #endif #define ETHERNET_PACKET_LEN 1514 struct eth_pkt { uint32_t size; //size of data char data[ETHERNET_PACKET_LEN]; }__attribute__((packed)); struct vnet_nic_state { char mac[6]; struct guest_info *core; struct gen_queue * inpkt_q; void *frontend_data; int (*frontend_input)(struct v3_vm_info *info, uchar_t * buf, uint32_t size, void *private_data); }; //used when virtio_nic get a packet from guest and send it to the backend static int vnet_send(uint8_t * buf, uint32_t len, void * private_data, struct vm_device *dest_dev){ PrintDebug("Virito NIC: In vnet_send: guest net state %p\n", private_data); v3_vnet_send_rawpkt(buf, len, private_data); return 0; } static int register_frontend_input(void *backend_data, int (*frontend_input)(struct v3_vm_info *info, uchar_t * buf, uint32_t size, void *private_data), void *front_data){ struct vnet_nic_state *dev = (struct vnet_nic_state *)backend_data; dev->frontend_data = front_data; dev->frontend_input = frontend_input; return 0; } static struct v3_dev_net_ops net_ops = { .send = vnet_send, .register_input = register_frontend_input, }; static int virtio_input(struct v3_vm_info *info, uchar_t * buf, uint32_t len, void * private_data){ struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data; PrintDebug("Vnet-nic: In input: vnet_nic state %p\n", vnetnic); return vnetnic->frontend_input(info, buf, len, vnetnic->frontend_data); } #if 0 static int sendto_buf(struct vnet_nic_dev_state *vnetnic_dev, uchar_t * buf, uint_t size) { struct eth_pkt *pkt; pkt = (struct eth_pkt *)V3_Malloc(sizeof(struct eth_pkt)); if(pkt == NULL){ PrintError("Vnet NIC: Memory allocate fails\n"); return -1; } pkt->size = size; memcpy(pkt->data, buf, size); v3_enqueue(vnetnic_dev->inpkt_q, (addr_t)pkt); PrintDebug("Vnet NIC: sendto_buf: packet: (size:%d)\n", (int)pkt->size); return pkt->size; } /* *called in svm/vmx handler *iteative handled the unsent packet in incoming packet queues for *all virtio nic devices in this guest */ int v3_virtionic_pktprocess(struct guest_info * info) { struct eth_pkt *pkt = NULL; struct virtio_net_state *net_state; int i; //PrintDebug("Virtio NIC: processing guest %p\n", info); for (i = 0; i < net_idx; i++) { while (1) { net_state = temp_net_states[i]; if(net_state->dev->vm != info) break; pkt = (struct eth_pkt *)v3_dequeue(net_state->inpkt_q); if(pkt == NULL) break; if (send_pkt_to_guest(net_state, pkt->data, pkt->size, 1, NULL)) { PrintDebug("Virtio NIC: %p In pkt_handle: send one packet! pt length %d\n", net_state, (int)pkt->size); } else { PrintDebug("Virtio NIC: %p In pkt_handle: Fail to send one packet, pt length %d, discard it!\n", net_state, (int)pkt->size); } V3_Free(pkt); } } return 0; } /* *called in svm/vmx handler *iteative handled the unsent packet in incoming packet queues for *all virtio nic devices in this guest */ int v3_vnetnic_pktprocess(struct guest_info * info) { return 0; } #endif //register a virtio device to the vnet as backend int register_to_vnet(struct v3_vm_info *info, struct vnet_nic_state *vnet_nic, char *dev_name, uchar_t mac[6]){ uchar_t brdmac[6] = {0xff,0xff,0xff,0xff,0xff,0xff}; uchar_t zeromac[6] = {0,0,0,0,0,0}; struct v3_vnet_route route; PrintDebug("Vnet-nic: register Vnet-nic device %s, state %p to VNET\n", dev_name, vnet_nic); int idx = v3_vnet_add_node(info, dev_name, mac, virtio_input, (void *)vnet_nic); if (idx < 0) return -1; //add default routes for each link edge device memcpy(&route.src_mac, zeromac, 6); memcpy(&route.dest_mac, mac, 6); route.src_mac_qual = MAC_ANY; route.dest_mac_qual = MAC_NONE; route.link_idx = idx; route.link_type = LINK_EDGE; route.src_link_idx = -1; route.src_type = LINK_ANY; v3_vnet_add_route(&route); memcpy(&route.dest_mac, brdmac, 6); memcpy(&route.src_mac, mac, 6); route.src_mac_qual = MAC_NOT; route.dest_mac_qual = MAC_NONE; route.link_idx = idx; route.link_type = LINK_EDGE; route.src_link_idx = -1; route.src_type = LINK_ANY; v3_vnet_add_route(&route); return 0; } static int vnet_nic_free(struct vm_device * dev) { return 0; } static struct v3_device_ops dev_ops = { .free = vnet_nic_free, .reset = NULL, .start = NULL, .stop = NULL, }; static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) { struct vnet_nic_state * vnetnic = NULL; char * name = v3_cfg_val(cfg, "name"); v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend"); vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state)); memset(vnetnic, 0, sizeof(struct vnet_nic_state)); struct vm_device * dev = v3_allocate_device(name, &dev_ops, vnetnic); if (v3_attach_device(vm, dev) == -1) { PrintError("Could not attach device %s\n", name); return -1; } if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"), &net_ops, frontend_cfg, vnetnic) == -1) { PrintError("Could not connect %s to frontend %s\n", name, v3_cfg_val(frontend_cfg, "tag")); return -1; } vnetnic->inpkt_q = v3_create_queue(); if(register_to_vnet(vm, vnetnic, name, vnetnic->mac) == -1) return -1; PrintDebug("Vnet-nic device %s initialized\n", name); return 0; } device_register("VNET_NIC", vnet_nic_init)