X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_vnet.c;h=1ec015ee8ab7cc2f100365ba9080da5fd6f7d3f6;hb=4c4382c3fa7e7e87c260b6bb473220d0081ca1d5;hp=ecaa96377cdddfedb54cab31f87f05675b65126f;hpb=2774b84f1350366477eb820c7b7a2a0f56a0e074;p=palacios.git diff --git a/palacios/src/palacios/vmm_vnet.c b/palacios/src/palacios/vmm_vnet.c index ecaa963..1ec015e 100644 --- a/palacios/src/palacios/vmm_vnet.c +++ b/palacios/src/palacios/vmm_vnet.c @@ -7,7 +7,7 @@ * and the University of New Mexico. You can find out more at * http://www.v3vee.org * - * Copyright (c) 2009, Lei Xia + * Copyright (c) 2010, Lei Xia * Copyright (c) 2009, Yuan Tang * Copyright (c) 2009, The V3VEE Project * All rights reserved. @@ -20,9 +20,10 @@ */ #include -#include #include #include +#include +#include #ifndef CONFIG_DEBUG_VNET #undef PrintDebug @@ -30,20 +31,11 @@ #endif -#define ETHERNET_HEADER_LEN 14 -#define ETHERNET_DATA_MIN 46 -#define ETHERNET_DATA_MAX 1500 -#define ETHERNET_PACKET_LEN (ETHERNET_HEADER_LEN + ETHERNET_DATA_MAX) - - -typedef enum {TCP_TYPE, UDP_TYPE, NONE_TYPE} prot_type_t; - -#define VNET_INITAB_HCALL 0xca00 - +/* for UDP encapuslation */ struct eth_header { uchar_t dest[6]; uchar_t src[6]; - uint16_t type; // indicates layer 3 protocol type + uint16_t type; }__attribute__((packed)); struct ip_header { @@ -73,739 +65,684 @@ struct udp_link_header { struct ip_header ip_hdr; struct udp_header udp_hdr; }__attribute__((packed)); +/* end with UDP encapuslation structures */ -struct ethernet_pkt { - uint32_t size; //size of data field - uint16_t type; - uint8_t use_header; - struct udp_link_header ext_hdr; - char data[ETHERNET_PACKET_LEN]; -}__attribute__((packed)); -#define DEVICE_NAME_LEN 20 -struct vnet_if_device { - char name[DEVICE_NAME_LEN]; - uchar_t mac_addr[6]; - struct v3_vm_info *vm; - - int (*input)(struct v3_vm_info *vm, uchar_t *data, uint32_t len, void *private_data); - - void *private_data; -}__attribute__((packed)); +struct eth_hdr { + uint8_t dst_mac[6]; + uint8_t src_mac[6]; + uint16_t type; /* indicates layer 3 protocol type */ +} __attribute__((packed)); -struct vnet_if_link { - prot_type_t pro_type; //transport layer protocal type of this link - unsigned long dest_ip; - uint16_t dest_port; - struct udp_link_header vnet_header; //header applied to the packet in/out from this link +struct vnet_dev { + int dev_id; + uint8_t mac_addr[6]; + struct v3_vm_info * vm; + struct v3_vnet_dev_ops dev_ops; + void * private_data; - int (*input)(uchar_t *data, uint32_t len, void *private_data); + int rx_disabled; - void *private_data; -}__attribute__((packed)); + struct list_head node; +} __attribute__((packed)); -struct link_entry { - link_type_t type; - - union { - struct vnet_if_device *dst_dev; - struct vnet_if_link *dst_link; - } __attribute__((packed)); +struct vnet_brg_dev { + struct v3_vm_info * vm; + struct v3_vnet_bridge_ops brg_ops; - int use; -}__attribute__((packed)); + int disabled; + void * private_data; +} __attribute__((packed)); -//routing table entry -struct routing_entry { - char src_mac[6]; - char dest_mac[6]; - mac_type_t src_mac_qual; - mac_type_t dest_mac_qual; - int link_idx; //link[dest] is the link to be used to send pkt - link_type_t link_type; //EDGE|INTERFACE|ANY - - int src_link_idx; - link_type_t src_type; //EDGE|INTERFACE|ANY +struct vnet_route_info { + struct v3_vnet_route route_def; + + struct vnet_dev * dst_dev; + struct vnet_dev * src_dev; + + struct list_head node; + struct list_head match_node; // used for route matching }; -// 14 (ethernet frame) + 20 bytes -struct in_pkt_header { - uchar_t ethernetdest[6]; - uchar_t ethernetsrc[6]; - uchar_t ethernettype[2]; //layer 3 protocol type - char ip[20]; -}__attribute__((packed)); +struct route_list { + uint8_t hash_buf[VNET_HASH_SIZE]; + uint32_t num_routes; + struct vnet_route_info * routes[0]; +} __attribute__((packed)); -#define MAX_LINKS 10 -#define MAX_ROUTES 10 -#define HASH_KEY_LEN 16 -#define MIN_CACHE_SIZE 100 -#define HASH_KEY_SIZE 16 -struct link_table { - struct link_entry * links[MAX_LINKS]; - uint16_t size; +#define BUF_SIZE 4096 +struct pkts_buf { + int start, end; + int num; v3_lock_t lock; -}__attribute__((packed)); + struct v3_vnet_pkt pkts[BUF_SIZE]; +}; -struct routing_table { - struct routing_entry * routes[MAX_ROUTES]; - uint16_t size; - v3_lock_t lock; -}__attribute__((packed)); -typedef char * route_hashkey_t; +static struct { + struct list_head routes; + struct list_head devs; + + int num_routes; + int num_devs; -struct route_cache_entry { - int num_matched_routes; - int * matches; -}; + struct vnet_brg_dev *bridge; -struct vnet_state_t { - struct link_table g_links; - struct routing_table g_routes; - struct gen_queue * g_inpkt_q; - struct hashtable * g_route_cache; - v3_lock_t cache_lock; -}; + v3_lock_t lock; -static struct vnet_state_t g_vnet_state;//global state for vnet + uint8_t sidecores; /* 0 -vnet not running on sidecore, > 0, number of extra cores that can be used by VNET */ + uint64_t cores_map; /* bitmaps for which cores can be used by VNET for sidecore, maxium 64 */ -static uint16_t ip_xsum(struct ip_header *ip_hdr, int hdr_len){ - long sum = 0; + struct hashtable * route_cache; +} vnet_state; - uint16_t *p = (uint16_t*) ip_hdr; - while(hdr_len > 1){ - sum += *(p++); - if(sum & 0x80000000) - sum = (sum & 0xFFFF) + (sum >> 16); - hdr_len -= 2; - } - - if(hdr_len) - sum += (uint16_t) *(uchar_t *)p; - - while(sum>>16) - sum = (sum & 0xFFFF) + (sum >> 16); - return (uint16_t)~sum; -} -static void ethernet_packet_init(struct ethernet_pkt *pt, - uchar_t *data, - const size_t size) { - pt->size = size; - pt->use_header = 0; - memset(&pt->ext_hdr, 0, sizeof(struct udp_link_header)); - memcpy(pt->data, data, size); -} -static inline uint_t hash_from_key_fn(addr_t hashkey) { - return v3_hash_buffer((uint8_t *)hashkey, HASH_KEY_LEN); +#ifdef CONFIG_DEBUG_VNET +static inline void mac_to_string(char mac[6], char * buf) { + snprintf(buf, 100, "%d:%d:%d:%d:%d:%d", + mac[0], mac[1], mac[2], + mac[3], mac[4], mac[5]); } -static inline int hash_key_equal(addr_t key1, addr_t key2) { - return (memcmp((uint8_t *)key1, (uint8_t *)key2, HASH_KEY_LEN) == 0); +static void print_route(struct vnet_route_info *route){ + char str[50]; + + mac_to_string(route->route_def.src_mac, str); + PrintDebug("Src Mac (%s), src_qual (%d)\n", + str, route->route_def.src_mac_qual); + mac_to_string(route->route_def.dst_mac, str); + PrintDebug("Dst Mac (%s), dst_qual (%d)\n", + str, route->route_def.dst_mac_qual); + PrintDebug("Src dev id (%d), src type (%d)", + route->route_def.src_id, + route->route_def.src_type); + PrintDebug("Dst dev id (%d), dst type (%d)\n", + route->route_def.dst_id, + route->route_def.dst_type); + if (route->route_def.dst_type == LINK_INTERFACE) { + PrintDebug("dst_dev (%p), dst_dev_id (%d), dst_dev_ops(%p), dst_dev_data (%p)\n", + route->dst_dev, + route->dst_dev->dev_id, + (void *)&(route->dst_dev->dev_ops), + route->dst_dev->private_data); + } } -static int init_route_cache(struct vnet_state_t *vnet_state) { - vnet_state->g_route_cache = v3_create_htable(MIN_CACHE_SIZE, - &hash_from_key_fn, - &hash_key_equal); - - if (vnet_state->g_route_cache == NULL) { - PrintError("Vnet: Route Cache Init Fails\n"); - return -1; - } +static void dump_routes(){ + struct vnet_route_info *route; - return 0; + int i = 0; + PrintDebug("\n========Dump routes starts ============\n"); + list_for_each_entry(route, &(vnet_state.routes), node) { + PrintDebug("\nroute %d:\n", ++i); + + print_route(route); + } + PrintDebug("\n========Dump routes end ============\n"); } -static void make_hash_key(route_hashkey_t hashkey, - char src_addr[6], - char dest_addr[6], - char src_type, - int src_index) { - int j; +#endif - for (j = 0; j < 6; j++) { - hashkey[j] = src_addr[j]; - hashkey[j + 6] = dest_addr[j] + 1; - } - hashkey[12] = src_type; +/* + * A VNET packet is a packed struct with the hashed fields grouped together. + * This means we can generate the hash from an offset into the pkt struct + */ +static inline uint_t hash_fn(addr_t hdr_ptr) { + uint8_t * hdr_buf = (uint8_t *)hdr_ptr; - *(int *)(hashkey + 12) = src_index; + return v3_hash_buffer(hdr_buf, VNET_HASH_SIZE); } -static int add_route_to_cache(route_hashkey_t hashkey, - int num_matched_r, - int * matches) { - struct route_cache_entry * new_entry = NULL; - struct vnet_state_t *vnet_state = &g_vnet_state; - int i; - - new_entry = (struct route_cache_entry *)V3_Malloc(sizeof(struct route_cache_entry)); - if (new_entry == NULL) { - PrintError("Vnet: Malloc fails\n"); - return -1; - } - - new_entry->num_matched_routes = num_matched_r; - new_entry->matches = (int *)V3_Malloc(num_matched_r * sizeof(int)); - - if (new_entry->matches == NULL) { - PrintError("Vnet: Malloc fails\n"); - return -1; - } - - for (i = 0; i < num_matched_r; i++) { - new_entry->matches[i] = matches[i]; - } - - if (v3_htable_insert(vnet_state->g_route_cache, (addr_t)hashkey, (addr_t)new_entry) == 0) { +static inline int hash_eq(addr_t key1, addr_t key2) { + return (memcmp((uint8_t *)key1, (uint8_t *)key2, VNET_HASH_SIZE) == 0); +} + +static int add_route_to_cache(const struct v3_vnet_pkt * pkt, struct route_list * routes) { + memcpy(routes->hash_buf, pkt->hash_buf, VNET_HASH_SIZE); + + if (v3_htable_insert(vnet_state.route_cache, (addr_t)routes->hash_buf, (addr_t)routes) == 0) { PrintError("Vnet: Failed to insert new route entry to the cache\n"); - V3_Free(new_entry->matches); - V3_Free(new_entry); + return -1; } return 0; } static int clear_hash_cache() { - struct vnet_state_t *vnet_state = &g_vnet_state; - v3_free_htable(vnet_state->g_route_cache, 1, 1); - vnet_state->g_route_cache = v3_create_htable(MIN_CACHE_SIZE, - hash_from_key_fn, - hash_key_equal); - - if (vnet_state->g_route_cache == NULL) { - PrintError("Vnet: Route Cache Create Failurely\n"); - return -1; - } + v3_free_htable(vnet_state.route_cache, 1, 1); + vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq); return 0; } -static int look_into_cache(route_hashkey_t hashkey, int * matches) { - struct route_cache_entry * found = NULL; - int n_matches = -1; - int i = 0; - struct vnet_state_t *vnet_state = &g_vnet_state; +static int look_into_cache(const struct v3_vnet_pkt * pkt, struct route_list ** routes) { - found = (struct route_cache_entry *)v3_htable_search(vnet_state->g_route_cache, - (addr_t)hashkey); + *routes = (struct route_list *)v3_htable_search(vnet_state.route_cache, (addr_t)(pkt->hash_buf)); - if (found != NULL) { - n_matches = found->num_matched_routes; + return 0; +} - for (i = 0; i < n_matches; i++) { - matches[i] = found->matches[i]; - } - } - return n_matches; -} +static struct vnet_dev * find_dev_by_id(int idx) { + struct vnet_dev * dev = NULL; + list_for_each_entry(dev, &(vnet_state.devs), node) { + int dev_id = dev->dev_id; -#ifdef CONFIG_DEBUG_VNET + if (dev_id == idx) + return dev; + } -static void print_packet(uchar_t *pkt, int size) { - PrintDebug("Vnet: data_packet: size: %d\n", size); - v3_hexdump(pkt, size, NULL, 0); + return NULL; } -static inline uint8_t hex_nybble_to_nybble(const uint8_t hexnybble) { - uint8_t x = toupper(hexnybble); - - if (isdigit(x)) { - return x - '0'; - } else { - return 10 + (x - 'A'); +static struct vnet_dev * find_dev_by_mac(char mac[6]) { + struct vnet_dev * dev = NULL; + + list_for_each_entry(dev, &(vnet_state.devs), node) { + if (!memcmp(dev->mac_addr, mac, 6)) + return dev; } + + return NULL; } -static inline uint8_t hex_byte_to_byte(const uint8_t hexbyte[2]) { - return ((hex_nybble_to_nybble(hexbyte[0]) << 4) + - (hex_nybble_to_nybble(hexbyte[1]) & 0xf)); +int v3_vnet_id_by_mac(char mac[6]){ + + struct vnet_dev *dev = find_dev_by_mac(mac); + + if (dev == NULL) + return -1; + + return dev->dev_id; } -static inline void string_to_mac(const char *str, uint8_t mac[6]) { - int k; - for (k = 0; k < 6; k++) { - mac[k] = hex_byte_to_byte(&(str[(2 * k) + k])); +int v3_vnet_add_route(struct v3_vnet_route route) { + struct vnet_route_info * new_route = NULL; + unsigned long flags; + + new_route = (struct vnet_route_info *)V3_Malloc(sizeof(struct vnet_route_info)); + memset(new_route, 0, sizeof(struct vnet_route_info)); + + PrintDebug("Vnet: vnet_add_route_entry: dst_id: %d, dst_type: %d\n", + route.dst_id, route.dst_type); + + memcpy(new_route->route_def.src_mac, route.src_mac, 6); + memcpy(new_route->route_def.dst_mac, route.dst_mac, 6); + new_route->route_def.src_mac_qual = route.src_mac_qual; + new_route->route_def.dst_mac_qual = route.dst_mac_qual; + new_route->route_def.dst_id = route.dst_id; + new_route->route_def.dst_type = route.dst_type; + new_route->route_def.src_id = route.src_id; + new_route->route_def.src_type = route.src_type; + + if (new_route->route_def.dst_type == LINK_INTERFACE) { + new_route->dst_dev = find_dev_by_id(new_route->route_def.dst_id); } -} -static inline void mac_to_string(char mac[6], char * buf) { - snprintf(buf, 20, "%02x:%02x:%02x:%02x:%02x:%02x", - mac[0], mac[1], mac[2], - mac[3], mac[4], mac[5]); -} + if (new_route->route_def.src_type == LINK_INTERFACE) { + new_route->src_dev = find_dev_by_id(new_route->route_def.src_id); + } + flags = v3_lock_irqsave(vnet_state.lock); -static void print_route(struct routing_entry *route){ - char dest_str[18]; - char src_str[18]; + list_add(&(new_route->node), &(vnet_state.routes)); + clear_hash_cache(); - mac_to_string(route->src_mac, src_str); - mac_to_string(route->dest_mac, dest_str); + v3_unlock_irqrestore(vnet_state.lock, flags); + + +#ifdef CONFIG_DEBUG_VNET + dump_routes(); +#endif - PrintDebug("SRC(%s), DEST(%s), src_mac_qual(%d), dst_mac_qual(%d)\n", - src_str, - dest_str, - route->src_mac_qual, - route->dest_mac_qual); - PrintDebug("Src_Link(%d), src_type(%d), dst_link(%d), dst_type(%d)\n\n", - route->src_link_idx, - route->src_type, - route->link_idx, - route->link_type); + return 0; } - -static void dump_routes(struct routing_entry **route_tables) { - int i; - PrintDebug("\nVnet: route table dump start =====\n"); - for(i = 0; i < MAX_ROUTES; i++) { - if (route_tables[i] != NULL){ - print_route(route_tables[i]); - } - } +/* At the end allocate a route_list + * This list will be inserted into the cache so we don't need to free it + */ +static struct route_list * match_route(const struct v3_vnet_pkt * pkt) { + struct vnet_route_info * route = NULL; + struct route_list * matches = NULL; + int num_matches = 0; + int max_rank = 0; + struct list_head match_list; + struct eth_hdr * hdr = (struct eth_hdr *)(pkt->data); + uint8_t src_type = pkt->src_type; + uint32_t src_link = pkt->src_id; - PrintDebug("\nVnet: route table dump end =====\n"); -} +#ifdef CONFIG_DEBUG_VNET + { + char dst_str[100]; + char src_str[100]; + mac_to_string(hdr->src_mac, src_str); + mac_to_string(hdr->dst_mac, dst_str); + PrintDebug("Vnet: match_route. pkt: SRC(%s), DEST(%s)\n", src_str, dst_str); + } #endif -static int __add_link_entry(struct link_entry * link) { - int idx; - struct vnet_state_t *vnet_state = &g_vnet_state; + INIT_LIST_HEAD(&match_list); + +#define UPDATE_MATCHES(rank) do { \ + if (max_rank < (rank)) { \ + max_rank = (rank); \ + INIT_LIST_HEAD(&match_list); \ + \ + list_add(&(route->match_node), &match_list); \ + num_matches = 1; \ + } else if (max_rank == (rank)) { \ + list_add(&(route->match_node), &match_list); \ + num_matches++; \ + } \ + } while (0) + - v3_lock(vnet_state->g_links.lock); - for (idx = 0; idx < MAX_LINKS; idx++) { - if (vnet_state->g_links.links[idx] == NULL) { - vnet_state->g_links.links[idx] = link; - vnet_state->g_links.size++; - break; + list_for_each_entry(route, &(vnet_state.routes), node) { + struct v3_vnet_route * route_def = &(route->route_def); + + // CHECK SOURCE TYPE HERE + if ( (route_def->src_type != LINK_ANY) && + ( (route_def->src_type != src_type) || + ( (route_def->src_id != src_link) && + (route_def->src_id != (uint32_t)-1)))) { + continue; + } + + + if ((route_def->dst_mac_qual == MAC_ANY) && + (route_def->src_mac_qual == MAC_ANY)) { + UPDATE_MATCHES(3); + } + + if (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) { + if (route_def->src_mac_qual != MAC_NOT) { + if (route_def->dst_mac_qual == MAC_ANY) { + UPDATE_MATCHES(6); + } else if (route_def->dst_mac_qual != MAC_NOT && + memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) { + UPDATE_MATCHES(8); + } + } + } + + if (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) { + if (route_def->dst_mac_qual != MAC_NOT) { + if (route_def->src_mac_qual == MAC_ANY) { + UPDATE_MATCHES(6); + } else if ((route_def->src_mac_qual != MAC_NOT) && + (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) { + UPDATE_MATCHES(8); + } + } + } + + if ((route_def->dst_mac_qual == MAC_NOT) && + (memcmp(route_def->dst_mac, hdr->dst_mac, 6) != 0)) { + if (route_def->src_mac_qual == MAC_ANY) { + UPDATE_MATCHES(5); + } else if ((route_def->src_mac_qual != MAC_NOT) && + (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) { + UPDATE_MATCHES(7); + } + } + + if ((route_def->src_mac_qual == MAC_NOT) && + (memcmp(route_def->src_mac, hdr->src_mac, 6) != 0)) { + if (route_def->dst_mac_qual == MAC_ANY) { + UPDATE_MATCHES(5); + } else if ((route_def->dst_mac_qual != MAC_NOT) && + (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0)) { + UPDATE_MATCHES(7); + } + } + + // Default route + if ( (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) && + (route_def->dst_mac_qual == MAC_NONE)) { + UPDATE_MATCHES(4); } } - v3_unlock(vnet_state->g_links.lock); - if (idx == MAX_LINKS) { - PrintDebug("VNET: No available Link entry for new link\n"); - return -1; + PrintDebug("Vnet: match_route: Matches=%d\n", num_matches); + + if (num_matches == 0) { + return NULL; } - return idx; -} + matches = (struct route_list *)V3_Malloc(sizeof(struct route_list) + + (sizeof(struct vnet_route_info *) * num_matches)); -static int __add_route_entry(struct routing_entry * route) { - int idx; - struct vnet_state_t *vnet_state = &g_vnet_state; + matches->num_routes = num_matches; - v3_lock(vnet_state->g_routes.lock); - for (idx = 0; idx < MAX_ROUTES; idx++) { - if (vnet_state->g_routes.routes[idx] == NULL) { - vnet_state->g_routes.routes[idx] = route; - vnet_state->g_routes.size++; - break; + { + int i = 0; + list_for_each_entry(route, &match_list, match_node) { + matches->routes[i++] = route; } } - v3_unlock(vnet_state->g_routes.lock); - if(idx == MAX_LINKS){ - PrintDebug("VNET: No available route entry for new route\n"); - return -1; - } + return matches; +} -#ifdef CONFIG_DEBUG_VNET - dump_routes(vnet_state->g_routes.routes); -#endif +static int send_to_bridge(struct v3_vnet_pkt * pkt){ + struct vnet_brg_dev *bridge = vnet_state.bridge; - return idx; + if (bridge == NULL) { + PrintError("VNET: No bridge to sent data to links\n"); + return -1; + } + + return bridge->brg_ops.input(bridge->vm, pkt, 1, bridge->private_data); } -int v3_vnet_add_route(struct v3_vnet_route *route){ - struct routing_entry * new_route = (struct routing_entry *)V3_Malloc(sizeof(struct routing_entry)); - int idx = -1; - PrintDebug("Vnet: vnet_add_route_entry\n"); - - memset(new_route, 0, sizeof(struct routing_entry)); - if ((route->src_mac_qual != MAC_ANY)) { - memcpy(new_route->src_mac, route->src_mac, 6); - } - - if ((route->dest_mac_qual != MAC_ANY)) { - memcpy(new_route->dest_mac, route->dest_mac, 6); - } - - new_route->src_mac_qual = route->src_mac_qual; - new_route->dest_mac_qual = route->dest_mac_qual; - new_route->link_idx= route->link_idx; - new_route->link_type = route->link_type; - new_route->src_link_idx = route->src_link_idx; - new_route->src_type = route->src_type; - - if ((idx = __add_route_entry(new_route)) == -1) { - PrintError("Could not add route entry\n"); - return -1; +/* enable a vnet device, notify VNET it can send pkts to it */ +int v3_vnet_enable_device(int dev_id){ + struct vnet_dev *dev = find_dev_by_id(dev_id); + unsigned long flags; + + if(!dev) + return -1; + + if(!dev->rx_disabled) + return 0; + + flags = v3_lock_irqsave(vnet_state.lock); + dev->rx_disabled = 0; + v3_unlock_irqrestore(vnet_state.lock, flags); + + /* TODO: Wake up all other guests who are trying to send pkts */ + dev = NULL; + list_for_each_entry(dev, &(vnet_state.devs), node) { + if (dev->dev_id != dev_id) + dev->dev_ops.start_tx(dev->private_data); } - - clear_hash_cache(); - return idx; + return 0; } -static int match_route(uint8_t * src_mac, - uint8_t * dst_mac, - link_type_t src_type, - int src_index, - int * matches) { - struct routing_entry *route = NULL; - struct vnet_state_t *vnet_state = &g_vnet_state; - int matched_routes[MAX_ROUTES]; - int num_matches = 0; - int i; - -#ifdef CONFIG_DEBUG_VNET - char dest_str[18]; - char src_str[18]; +/* Notify VNET to stop sending pkts to it */ +int v3_vnet_disable_device(int dev_id){ + struct vnet_dev *dev = find_dev_by_id(dev_id); + unsigned long flags; - mac_to_string(src_mac, src_str); - mac_to_string(dst_mac, dest_str); - PrintDebug("Vnet: match_route. pkt: SRC(%s), DEST(%s)\n", src_str, dest_str); -#endif + if(!dev) + return -1; - for(i = 0; i < MAX_ROUTES; i++) { - if (vnet_state->g_routes.routes[i] != NULL){ - route = vnet_state->g_routes.routes[i]; + flags = v3_lock_irqsave(vnet_state.lock); + dev->rx_disabled = 1; + v3_unlock_irqrestore(vnet_state.lock, flags); - if(src_type == LINK_ANY && src_index == -1) { - if ((route->dest_mac_qual == MAC_ANY) && - (route->src_mac_qual == MAC_ANY)) { - matched_routes[num_matches] = i; - num_matches++; - } - - if (memcmp((void *)&route->src_mac, (void *)src_mac, 6) == 0) { - if (route->src_mac_qual != MAC_NOT) { - if (route->dest_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - num_matches++; - } else if (route->dest_mac_qual != MAC_NOT && - memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) == 0) { - matched_routes[num_matches] = i; - num_matches++; - } - } - } - - if (memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) == 0) { - if (route->dest_mac_qual != MAC_NOT) { - if (route->src_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - num_matches++; - } else if ((route->src_mac_qual != MAC_NOT) && - (memcmp((void *)&route->src_mac, (void *)src_mac, 6) == 0)) { - matched_routes[num_matches] = i; - num_matches++; - } - } - } - - if ((route->dest_mac_qual == MAC_NOT) && - (memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) != 0)) { - if (route->src_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - num_matches++; - } else if ((route->src_mac_qual != MAC_NOT) && - (memcmp((void *)&route->src_mac, (void *)src_mac, 6) == 0)) { - matched_routes[num_matches] = i; - num_matches++; - } - } - - if ((route->src_mac_qual == MAC_NOT) && - (memcmp((void *)&route->src_mac, (void *)src_mac, 6) != 0)) { - if (route->dest_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - num_matches++; - } else if ((route->dest_mac_qual != MAC_NOT) && - (memcmp((void *)&route->dest_mac, (void *)dst_mac, 6) == 0)) { - matched_routes[num_matches] = i; - num_matches++; - } - } - }//end if src_type == Link_any - } - }//end for - PrintDebug("Vnet: match_route: Matches=%d\n", num_matches); - - for (i = 0; i < num_matches; i++) { - matches[i] = matched_routes[i]; + /* TODO: Notify all other guests to stop send pkts */ + dev = NULL; + list_for_each_entry(dev, &(vnet_state.devs), node) { + if (dev->dev_id != dev_id) + dev->dev_ops.stop_tx(dev->private_data); } - - return num_matches; + + return 0; } -static int handle_one_pkt(struct ethernet_pkt *pkt) { - int src_link_index = -1; //the value of src_link_index of udp always is 0 - char src_mac[6]; - char dst_mac[6]; - int matches[MAX_ROUTES]; - int num_matched_routes = 0; - struct in_pkt_header header; - char hash_key[HASH_KEY_SIZE]; - struct vnet_state_t *vnet_state = &g_vnet_state; +int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data) { + struct route_list * matched_routes = NULL; + unsigned long flags; int i; - // get the ethernet and ip headers from the packet - memcpy((void *)&header, (void *)pkt->data, sizeof(header)); - memcpy(src_mac, header.ethernetsrc, 6); - memcpy(dst_mac, header.ethernetdest, 6); - #ifdef CONFIG_DEBUG_VNET - char dest_str[18]; - char src_str[18]; - - mac_to_string(src_mac, src_str); - mac_to_string(dst_mac, dest_str); - PrintDebug("Vnet: HandleDataOverLink. SRC(%s), DEST(%s)\n", src_str, dest_str); + { + struct eth_hdr * hdr = (struct eth_hdr *)(pkt->header); + char dest_str[100]; + char src_str[100]; + + mac_to_string(hdr->src_mac, src_str); + mac_to_string(hdr->dst_mac, dest_str); + int cpu = V3_Get_CPU(); + PrintDebug("Vnet: on cpu %d, HandleDataOverLink. SRC(%s), DEST(%s), pkt size: %d\n", cpu, src_str, dest_str, pkt->size); + } #endif - make_hash_key(hash_key, src_mac, dst_mac, LINK_EDGE, src_link_index); - num_matched_routes = look_into_cache((route_hashkey_t)hash_key, matches); - - if (num_matched_routes == -1) { - num_matched_routes = match_route(src_mac, dst_mac, LINK_ANY, src_link_index, matches); - if (num_matched_routes > 0) { - add_route_to_cache(hash_key, num_matched_routes,matches); - } - } - - PrintDebug("Vnet: HandleDataOverLink: Matches=%d\n", num_matched_routes); + flags = v3_lock_irqsave(vnet_state.lock); - if (num_matched_routes == 0) { - return -1; + look_into_cache(pkt, &matched_routes); + + if (matched_routes == NULL) { + PrintError("Vnet: send pkt Looking into routing table\n"); + + matched_routes = match_route(pkt); + + if (matched_routes) { + add_route_to_cache(pkt, matched_routes); + } else { + PrintDebug("Could not find route for packet... discards packet\n"); + v3_unlock_irqrestore(vnet_state.lock, flags); + return 0; /* do we return -1 here?*/ + } } - - for (i = 0; i < num_matched_routes; i++) {//send packet to all destinations - int route_index = -1; - int link_index = -1; - int pkt_len = 0; - struct link_entry * link = NULL; - - route_index = matches[i]; - link_index = vnet_state->g_routes.routes[route_index]->link_idx; - - if ((link_index < 0) || (link_index > MAX_LINKS) || - (vnet_state->g_links.links[link_index] == NULL)) { - continue; - } + + v3_unlock_irqrestore(vnet_state.lock, flags); + + PrintDebug("Vnet: send pkt route matches %d\n", matched_routes->num_routes); + + for (i = 0; i < matched_routes->num_routes; i++) { + struct vnet_route_info * route = matched_routes->routes[i]; - link = vnet_state->g_links.links[link_index]; - pkt_len = pkt->size; - if (link->type == LINK_EDGE) { - - //apply the header in the beginning of the packet to be sent - if (link->dst_link->pro_type == UDP_TYPE) { - struct udp_link_header *hdr = &(link->dst_link->vnet_header); - struct ip_header *ip = &hdr->ip_hdr; - struct udp_header *udp = &hdr->udp_hdr; - udp->len = pkt_len + sizeof(struct udp_header); - ip->total_len = pkt_len + sizeof(struct udp_header) + sizeof(struct ip_header); - ip->cksum = ip_xsum(ip, sizeof(struct ip_header)); - - int hdr_size = sizeof(struct udp_link_header); - memcpy(&pkt->ext_hdr, hdr, hdr_size); - - pkt_len += hdr_size; - if ((link->dst_link->input((uchar_t *)&pkt->ext_hdr, pkt_len, link->dst_link->private_data)) != pkt_len) { - PrintDebug("VNET: Packet not sent properly to link: %d\n", link_index); - continue; - } - }else { - PrintDebug("VNET: Link protocol type not support\n"); - continue; - } - } else if (link->type == LINK_INTERFACE) { - if ((link->dst_dev->input(link->dst_dev->vm, pkt->data, pkt_len, link->dst_dev->private_data)) != pkt_len) { - PrintDebug("VNET: Packet not sent properly to link: %d\n", link_index); + if (route->route_def.dst_type == LINK_EDGE) { + pkt->dst_type = LINK_EDGE; + pkt->dst_id = route->route_def.dst_id; + + if (send_to_bridge(pkt) == -1) { + PrintDebug("VNET: Packet not sent properly to bridge\n"); continue; + } + } else if (route->route_def.dst_type == LINK_INTERFACE) { + if (!route->dst_dev->rx_disabled){ + if(route->dst_dev->dev_ops.input(route->dst_dev->vm, pkt, route->dst_dev->private_data) == -1) { + PrintDebug("VNET: Packet not sent properly\n"); + continue; + } } } else { - PrintDebug("Vnet: Wrong Edge type of link: %d\n", link_index); - continue; + PrintError("VNET: Wrong Edge type\n"); } - PrintDebug("Vnet: HandleDataOverLink: Forward packet according to Route entry %d to link %d\n", route_index, link_index); + PrintDebug("VNET: Forward one packet according to Route %d\n", i); } return 0; } -static int send_ethernet_pkt(uchar_t *data, int len, void *private_data) { - struct ethernet_pkt *pkt; - struct vnet_state_t *vnet_state = &g_vnet_state; +int v3_vnet_add_dev(struct v3_vm_info *vm, uint8_t mac[6], + struct v3_vnet_dev_ops *ops, + void * priv_data){ + struct vnet_dev * new_dev = NULL; + unsigned long flags; - pkt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt)); - if(pkt == NULL){ - PrintError("VNET: Memory allocate fails\n"); - return -1; + new_dev = (struct vnet_dev *)V3_Malloc(sizeof(struct vnet_dev)); + + if (new_dev == NULL) { + PrintError("VNET: Malloc fails\n"); + return -1; + } + + memcpy(new_dev->mac_addr, mac, 6); + new_dev->dev_ops.input = ops->input; + new_dev->dev_ops.poll = ops->poll; + new_dev->private_data = priv_data; + new_dev->vm = vm; + new_dev->dev_id = 0; + + flags = v3_lock_irqsave(vnet_state.lock); + + if (!find_dev_by_mac(mac)) { + list_add(&(new_dev->node), &(vnet_state.devs)); + new_dev->dev_id = ++vnet_state.num_devs; } - memset(pkt, 0, sizeof(struct ethernet_pkt)); - ethernet_packet_init(pkt, data, len); - v3_enqueue(vnet_state->g_inpkt_q, (addr_t)pkt); - -#ifdef CONFIG_DEBUG_VNET - PrintDebug("VNET: send_pkt: transmitting packet: (size:%d)\n", (int)pkt->size); - print_packet((char *)data, len); -#endif + v3_unlock_irqrestore(vnet_state.lock, flags); - return 0; -} + /* if the device was found previosly the id should still be 0 */ + if (new_dev->dev_id == 0) { + PrintError("Device Alrady exists\n"); + return -1; + } -int v3_vnet_send_rawpkt(uchar_t * buf, - int len, - void *private_data) { - PrintDebug("VNET: In v3_vnet_send_rawpkt: pkt length %d\n", len); - - return send_ethernet_pkt(buf, len, private_data); -} + PrintDebug("Vnet: Add Device: dev_id %d\n", new_dev->dev_id); -//sending the packet from Dom0, should remove the link header -int v3_vnet_send_udppkt(uchar_t * buf, - int len, - void *private_data) { - uint_t hdr_len = sizeof(struct udp_link_header); - - PrintDebug("VNET: In v3_vnet_send_udppkt: pkt length %d\n", len); - - return send_ethernet_pkt((uchar_t *)(buf+hdr_len), len - hdr_len, private_data); + return new_dev->dev_id; } -static int search_device(char * device_name) { - struct vnet_state_t *vnet_state = &g_vnet_state; - int i; - for (i = 0; i < MAX_LINKS; i++) { - if ((vnet_state->g_links.links[i] != NULL) && (vnet_state->g_links.links[i]->type == LINK_INTERFACE)) { - if (strcmp(device_name, vnet_state->g_links.links[i]->dst_dev->name) == 0) { - return i; +/* TODO: Still need to figure out how to handle this multicore part --Lei + */ +void v3_vnet_poll(struct v3_vm_info *vm){ + struct vnet_dev * dev = NULL; + + switch (vnet_state.sidecores) { + case 0: + list_for_each_entry(dev, &(vnet_state.devs), node) { + if(dev->vm == vm){ + dev->dev_ops.poll(vm, dev->private_data); + } + } + break; + case 1: + break; + case 2: + list_for_each_entry(dev, &(vnet_state.devs), node) { + int cpu_id = vm->cores[0].cpu_id + 2; /* temporary here, should use vnet_state.cores_map */ + struct v3_vnet_dev_xcall_args dev_args; /* could cause problem here -LX */ + dev_args.vm = vm; + dev_args.private_data = dev->private_data; + V3_Call_On_CPU(cpu_id, dev->dev_ops.poll_xcall, (void *)&dev_args); } - } + break; + default: + break; } - - return -1; } -int v3_vnet_add_node(struct v3_vm_info *info, - char * dev_name, - uchar_t mac[6], - int (*netif_input)(struct v3_vm_info * vm, uchar_t * pkt, uint_t size, void * private_data), - void * priv_data){ - struct vnet_if_device * if_dev; +int v3_vnet_add_bridge(struct v3_vm_info * vm, + struct v3_vnet_bridge_ops *ops, + void * priv_data) { + unsigned long flags; + int bridge_free = 0; + struct vnet_brg_dev * tmp_bridge = NULL; + + flags = v3_lock_irqsave(vnet_state.lock); + + if (vnet_state.bridge == NULL) { + bridge_free = 1; + vnet_state.bridge = (void *)1; + } - int idx = search_device(dev_name); - if (idx != -1) { - PrintDebug("VNET: register device: Already has device with the name %s\n", dev_name); + v3_unlock_irqrestore(vnet_state.lock, flags); + + if (bridge_free == 0) { + PrintError("Bridge already set\n"); return -1; } - - if_dev = (struct vnet_if_device *)V3_Malloc(sizeof(struct vnet_if_device)); - if (if_dev == NULL) { - PrintError("VNET: Malloc fails\n"); + + tmp_bridge = (struct vnet_brg_dev *)V3_Malloc(sizeof(struct vnet_brg_dev)); + + if (tmp_bridge == NULL) { + PrintError("Malloc Fails\n"); + vnet_state.bridge = NULL; return -1; } - strcpy(if_dev->name, dev_name); - strncpy(if_dev->mac_addr, mac, 6); - if_dev->input = netif_input; - if_dev->private_data = priv_data; - if_dev->vm = info; + tmp_bridge->vm = vm; + tmp_bridge->brg_ops.input = ops->input; + tmp_bridge->brg_ops.xcall_input = ops->xcall_input; + tmp_bridge->brg_ops.polling_pkt = ops->polling_pkt; + tmp_bridge->private_data = priv_data; + tmp_bridge->disabled = 0; + + /* make this atomic to avoid possible race conditions */ + flags = v3_lock_irqsave(vnet_state.lock); + vnet_state.bridge = tmp_bridge; + v3_unlock_irqrestore(vnet_state.lock, flags); - struct link_entry * link = (struct link_entry *)V3_Malloc(sizeof(struct link_entry)); - link->type = LINK_INTERFACE; - link->dst_dev = if_dev; + return 0; +} + + +#if 0 +int v3_vnet_disable_bridge() { + unsigned long flags; + + flags = v3_lock_irqsave(vnet_state.lock); - idx = __add_link_entry(link); + if (vnet_state.bridge != NULL) { + vnet_state.bridge->disabled = 1; + } - if (idx < 0) return -1; + v3_unlock_irqrestore(vnet_state.lock, flags); - return idx; + return 0; } -int v3_vnet_pkt_process() { - struct ethernet_pkt * pkt; - struct vnet_state_t *vnet_state = &g_vnet_state; - while ((pkt = (struct ethernet_pkt *)v3_dequeue(vnet_state->g_inpkt_q))!= NULL) { - if (handle_one_pkt(pkt) != -1) { - PrintDebug("VNET: vnet_check: handle one packet! pt length %d, pt type %d\n", (int)pkt->size, (int)pkt->type); - } else { - PrintDebug("VNET: vnet_check: Fail to forward one packet, discard it!\n"); - } - - V3_Free(pkt); // be careful here - } +int v3_vnet_enable_bridge() { + unsigned long flags; + flags = v3_lock_irqsave(vnet_state.lock); + + if (vnet_state.bridge != NULL) { + vnet_state.bridge->disabled = 0; + } + + v3_unlock_irqrestore(vnet_state.lock, flags); + return 0; } +#endif -static void vnet_state_init(struct vnet_state_t *vnet_state) { - int i; +int v3_init_vnet() { + memset(&vnet_state, 0, sizeof(vnet_state)); + + INIT_LIST_HEAD(&(vnet_state.routes)); + INIT_LIST_HEAD(&(vnet_state.devs)); - /*initial links table */ - for (i = 0; i < MAX_LINKS; i++) { - vnet_state->g_links.links[i] = NULL; - } - vnet_state->g_links.size = 0; - if(v3_lock_init(&(vnet_state->g_links.lock)) == -1){ - PrintError("VNET: Failure to init lock for links table\n"); - } - PrintDebug("VNET: Links table initiated\n"); + vnet_state.num_devs = 0; + vnet_state.num_routes = 0; - /*initial routes table */ - for (i = 0; i < MAX_ROUTES; i++) { - vnet_state->g_routes.routes[i] = NULL; - } - vnet_state->g_routes.size = 0; - if(v3_lock_init(&(vnet_state->g_routes.lock)) == -1){ + PrintDebug("VNET: Links and Routes tables initiated\n"); + + if (v3_lock_init(&(vnet_state.lock)) == -1){ PrintError("VNET: Failure to init lock for routes table\n"); } - PrintDebug("VNET: Routes table initiated\n"); + PrintDebug("VNET: Locks initiated\n"); - /*initial pkt receiving queue */ - vnet_state->g_inpkt_q = v3_create_queue(); - v3_init_queue(vnet_state->g_inpkt_q); - PrintDebug("VNET: Receiving queue initiated\n"); + vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq); - /*initial routing cache */ - init_route_cache(vnet_state); -} + if (vnet_state.route_cache == NULL) { + PrintError("Vnet: Route Cache Init Fails\n"); + return -1; + } + vnet_state.sidecores = 0; + vnet_state.cores_map = 0; -int v3_init_vnet() { - vnet_state_init(&g_vnet_state); - - PrintDebug("VNET Initialized\n"); + PrintDebug("VNET: initiated\n"); return 0; } -