X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_vnet.c;h=bdc47190d784800ed35895a3cd8b5cc01d17ade9;hb=edd0131b7b8672c9c3a7ef8682d17a48d682a53f;hp=72d4049572c2456218b5dd7bbcd9cc45cb9a8984;hpb=9e9d28b5fe29fcf8fbed010c981254b5e25a6eac;p=palacios.git diff --git a/palacios/src/palacios/vmm_vnet.c b/palacios/src/palacios/vmm_vnet.c index 72d4049..bdc4719 100644 --- a/palacios/src/palacios/vmm_vnet.c +++ b/palacios/src/palacios/vmm_vnet.c @@ -8,24 +8,22 @@ * http://www.v3vee.org * * Copyright (c) 2009, Lei Xia - * Copyright (c) 2009, Yuan Tang - * Copyright (c) 2009, Jack Lange - * Copyright (c) 2009, Peter Dinda + * Copyright (c) 2009, Yuan Tang * Copyright (c) 2009, The V3VEE Project * All rights reserved. * * Author: Lei Xia * Yuan Tang - * Jack Lange - * Peter Dinda -#include #include +#include +#include +#include #ifndef CONFIG_DEBUG_VNET #undef PrintDebug @@ -33,917 +31,562 @@ #endif -struct ethernet_pkt { - uint32_t size; - uint16_t type; - char data[ETHERNET_PACKET_LEN]; -}; +struct eth_hdr { + uint8_t dst_mac[6]; + uint8_t src_mac[6]; + uint16_t type; // indicates layer 3 protocol type +} __attribute__((packed)); -// 14 (ethernet frame) + 20 bytes -struct in_pkt_header { - char ethernetdest[6]; - char ethernetsrc[6]; - unsigned char ethernettype[2]; // indicates layer 3 protocol type - char ip[20]; -}; -#define VNET_INITAB_HCALL 0xca00 // inital hypercall id -#define MAX_LINKS 10 -#define MAX_ROUTES 10 -#define HASH_KEY_LEN 16 -#define MIN_CACHE_SIZE 100 -static const uint_t hash_key_size = 16; -struct link_table { - struct link_entry * links[MAX_LINKS]; - uint16_t size; -}; -struct routing_table { - struct routing_entry * routes[MAX_ROUTES]; - uint16_t size; -}; +struct vnet_dev { -static struct link_table g_links; -static struct routing_table g_routes; -static struct gen_queue * g_inpkt_q; + uint8_t mac_addr[6]; + struct v3_vm_info * vm; + + int (*input)(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data); + void * private_data; + + int dev_id; + struct list_head node; +} __attribute__((packed)); -/* Hash key format: - * 0-5: src_eth_addr - * 6-11: dest_eth_addr - * 12: src type - * 13-16: src index - */ -typedef char * route_hashkey_t; -// This is the hash value, Format: 0: num_matched_routes, 1...n: matches[] -- TY -struct route_cache_entry { - int num_matched_routes; - int * matches; +struct vnet_brg_dev { + struct v3_vm_info * vm; + + int (*input)(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data); + void * private_data; +} __attribute__((packed)); + + + + + +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 }; -// the route cache -static struct hashtable * g_route_cache; -static void print_packet(char * pkt, int size) { - PrintDebug("Vnet: print_data_packet: size: %d\n", size); - v3_hexdump(pkt, size, NULL, 0); -} -#if 0 -static void print_packet_addr(char * pkt) { - PrintDebug("Vnet: print_packet_destination_addr: "); - v3_hexdump(pkt + 8, 6, NULL, 0); +struct route_list { + uint8_t hash_buf[VNET_HASH_SIZE]; + + uint32_t num_routes; + struct vnet_route_info * routes[0]; +} __attribute__((packed)); + + + +static struct { + struct list_head routes; + struct list_head devs; - PrintDebug("Vnet: print_packet_source_addr: "); - v3_hexdump(pkt + 14, 6, NULL, 0); -} + int num_routes; + int num_devs; -static void print_device_addr(char * ethaddr) { - PrintDebug("Vnet: print_device_addr: "); - v3_hexdump(ethaddr, 6, NULL, 0); -} -#endif + struct vnet_brg_dev *bridge; + v3_lock_t lock; -// network connection functions -static inline void ethernet_packet_init(struct ethernet_pkt * pt, const char * data, const size_t size) { - pt->size = size; - memcpy(pt->data, data, size); -} + struct gen_queue * inpkt_q; + struct hashtable * route_cache; -static uint_t hash_from_key_fn(addr_t hashkey) { - uint8_t * key = (uint8_t *)hashkey; - return v3_hash_buffer(key, HASH_KEY_LEN); -} +} vnet_state; -static int hash_key_equal(addr_t key1, addr_t key2) { - uint8_t * buf1 = (uint8_t *)key1; - uint8_t * buf2 = (uint8_t *)key2; - return (memcmp(buf1, buf2, HASH_KEY_LEN) == 0); -} -static int init_route_cache() { - g_route_cache = v3_create_htable(MIN_CACHE_SIZE, &hash_from_key_fn, &hash_key_equal); - if (g_route_cache == NULL) { - PrintError("Vnet: Route Cache Initiate Failurely\n"); - return -1; - } - return 0; +#ifdef CONFIG_DEBUG_VNET +static inline void mac_to_string(char mac[6], char * buf) { + snprintf(buf, 50, "%x:%x:%x:%x:%x:%x", + mac[0], mac[1], mac[2], + mac[3], mac[4], mac[5]); } -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; +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_input (%p), dst_dev_data (%p)\n", + route->dst_dev, + route->dst_dev->dev_id, + route->dst_dev->input, + route->dst_dev->private_data); + } +} + +static void dump_routes(){ + struct vnet_route_info *route; + + 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"); +} - for (j = 0; j < 6; j++) { - hashkey[j] = src_addr[j]; - hashkey[j + 6] = dest_addr[j] + 1; - } +#endif - hashkey[12] = src_type; - *(int *)(hashkey + 12) = src_index; +/* + * 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; + + 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; - 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; +static inline int hash_eq(addr_t key1, addr_t key2) { + return (memcmp((uint8_t *)key1, (uint8_t *)key2, VNET_HASH_SIZE) == 0); +} - new_entry->matches = (int *)V3_Malloc(num_matched_r * sizeof(int)); - - if (new_entry->matches == NULL) { - PrintError("Vnet: Malloc fails\n"); + +static int add_route_to_cache(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"); return -1; } - for (i = 0; i < num_matched_r; i++) { - new_entry->matches[i] = matches[i]; - } - - // here, when v3_htable_insert return 0, it means insert fails - if (v3_htable_insert(g_route_cache, (addr_t)hashkey, (addr_t)new_entry) == 0) { - PrintError("Vnet: Insert new route entry to cache failed\n"); - V3_Free(new_entry->matches); - V3_Free(new_entry); - } - return 0; } static int clear_hash_cache() { - v3_free_htable(g_route_cache, 1, 1); - - g_route_cache = v3_create_htable(MIN_CACHE_SIZE, hash_from_key_fn, hash_key_equal); - - if (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; +static int look_into_cache(struct v3_vnet_pkt * pkt, struct route_list ** routes) { - found = (struct route_cache_entry *)v3_htable_search(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; - - for (i = 0; i < n_matches; i++) { - matches[i] = found->matches[i]; - } - } - - return n_matches; -} - -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'); - } + return 0; } -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)); -} -static inline void string_to_mac(const char *str, uint8_t mac[6]) { - int k; +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; - for (k = 0; k < 6; k++) { - mac[k] = hex_byte_to_byte(&(str[(2 * k) + k])); + if (dev_id == idx) + return dev; } -} -static inline void mac_to_string(char mac[6], char * buf) { - snprintf(buf, 20, "%x:%x:%x:%x:%x:%x", - mac[0], mac[1], mac[2], - mac[3], mac[4], mac[5]); + return NULL; } -static int add_link_entry(struct link_entry * link) { - int idx; +static struct vnet_dev * find_dev_by_mac(char mac[6]) { + struct vnet_dev * dev = NULL; - for (idx = 0; idx < MAX_LINKS; idx++) { - if (g_links.links[idx] == NULL) { - g_links.links[idx] = link; - g_links.size++; - - return idx; - } + list_for_each_entry(dev, &(vnet_state.devs), node) { + if (!memcmp(dev->mac_addr, mac, 6)) + return dev; } - PrintError("No available Link entry\n"); - return -1; + return NULL; } -static int add_route_entry(struct routing_entry * route) { - int idx; - - for (idx = 0; idx < MAX_ROUTES; idx++) { - if (g_routes.routes[idx] == NULL) { - g_routes.routes[idx] = route; - g_routes.size++; - - return idx; - } - } +int get_device_id_by_mac(char mac[6]){ + + struct vnet_dev *dev = find_dev_by_mac(mac); - PrintError("No available route entry\n"); - return -1; + if (dev == NULL) + return -1; + + return dev->dev_id; } -static int vnet_add_route_entry(char src_mac[6], - char dest_mac[6], - int src_mac_qual, - int dest_mac_qual, - int link_idx, - link_type_t link_type, - int src, - link_type_t src_type) { - struct routing_entry * new_route = (struct routing_entry *)V3_Malloc(sizeof(struct routing_entry)); - int idx = -1; +int v3_vnet_add_route(struct v3_vnet_route route) { + struct vnet_route_info * new_route = NULL; + unsigned long flags; - memset(new_route, 0, sizeof(struct routing_entry)); + new_route = (struct vnet_route_info *)V3_Malloc(sizeof(struct vnet_route_info)); + memset(new_route, 0, sizeof(struct vnet_route_info)); - if ((src_mac_qual != MAC_ANY) && (src_mac_qual != MAC_NONE)) { - memcpy(new_route->src_mac, src_mac, 6); - } - - if ((dest_mac_qual != MAC_ANY) && (dest_mac_qual != MAC_NONE)) { - memcpy(new_route->dest_mac, dest_mac, 6); - } - - new_route->src_mac_qual = src_mac_qual; - new_route->dest_mac_qual = dest_mac_qual; - new_route->link_idx= link_idx; - new_route->link_type = link_type; - new_route->src_link_idx = src; - new_route->src_type = src_type; - - if ((idx = add_route_entry(new_route)) == -1) { - PrintError("Could not add route entry\n"); - return -1; - } + PrintDebug("Vnet: vnet_add_route_entry: dst_id: %d, dst_type: %d\n", + route.dst_id, route.dst_type); - clear_hash_cache(); - - return idx; -} + 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; -static void * delete_link_entry(int index) { - struct link_entry * link = NULL; - void * ret = NULL; - link_type_t type; - - if ((index >= MAX_LINKS) || (g_links.links[index] == NULL)) { - return NULL; + if (new_route->route_def.dst_type == LINK_INTERFACE) { + new_route->dst_dev = find_dev_by_id(new_route->route_def.dst_id); + PrintDebug("Vnet: Add route, get device: dev_id %d, input : %p, private_data %p\n", + new_route->dst_dev->dev_id, new_route->dst_dev->input, new_route->dst_dev->private_data); } - link = g_links.links[index]; - type = g_links.links[index]->type; - - if (type == LINK_INTERFACE) { - ret = (void *)g_links.links[index]->dst_dev; - } else if (type == LINK_EDGE) { - ret = (void *)g_links.links[index]->dst_link; + if (new_route->route_def.src_type == LINK_INTERFACE) { + new_route->src_dev = find_dev_by_id(new_route->route_def.src_id); } - g_links.links[index] = NULL; - g_links.size--; + flags = v3_lock_irqsave(vnet_state.lock); - V3_Free(link); - - return ret; -} + list_add(&(new_route->node), &(vnet_state.routes)); + clear_hash_cache(); -static int find_route_entry(char src_mac[6], - char dest_mac[6], - int src_mac_qual, - int dest_mac_qual, - int link_idx, - link_type_t link_type, - int src, - link_type_t src_type) { - int i; - char temp_src_mac[6]; - char temp_dest_mac[6]; - - if ((src_mac_qual != MAC_ANY) && (src_mac_qual != MAC_NONE)) { - memcpy(temp_src_mac, src_mac, 6); - } else { - memset(temp_src_mac, 0, 6); - } - - if ((dest_mac_qual != MAC_ANY) && (dest_mac_qual != MAC_NONE)) { - memcpy(temp_dest_mac, dest_mac, 6); - } else { - memset(temp_dest_mac, 0, 6); - } - - for (i = 0; i < MAX_ROUTES; i++) { - if (g_routes.routes[i] != NULL) { - if ((memcmp(temp_src_mac, g_routes.routes[i]->src_mac, 6) == 0) && - (memcmp(temp_dest_mac, g_routes.routes[i]->dest_mac, 6) == 0) && - (g_routes.routes[i]->src_mac_qual == src_mac_qual) && - (g_routes.routes[i]->dest_mac_qual == dest_mac_qual) && - ( (link_type == LINK_ANY) || - ((link_type == g_routes.routes[i]->link_type) && (g_routes.routes[i]->link_idx == link_idx))) && - ( (src_type == LINK_ANY) || - ((src_type == g_routes.routes[i]->src_type) && (g_routes.routes[i]->src_link_idx == src)))) { - return i; - } - } - } - - return -1; -} + v3_unlock_irqrestore(vnet_state.lock, flags); + + +#ifdef CONFIG_DEBUG_VNET + dump_routes(); +#endif -static int delete_route_entry(int index) { - struct routing_entry * route; + return 0; +} - if ((index >= MAX_ROUTES) || (g_routes.routes[index] == NULL)) { - PrintError("Could not find route entry %d\n", index); - return -1; - } - route = g_routes.routes[index]; - g_routes.routes[index] = NULL; - g_routes.size--; - V3_Free(route); +// 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(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; - clear_hash_cache(); - - return 0; -} +#ifdef CONFIG_DEBUG_VNET + { + char dst_str[50]; + char src_str[50]; -static int vnet_delete_route_entry_by_addr(char src_mac[6], - char dest_mac[6], - int src_mac_qual, - int dest_mac_qual, - int link_idx, - link_type_t type, - int src, - link_type_t src_type) { - int index = find_route_entry(src_mac, dest_mac, src_mac_qual, - dest_mac_qual, link_idx, type, src, src_type); - - if (index == -1) { - PrintError("Error deleting route entry by addr\n"); - return -1; + 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); } - - return delete_route_entry(index); -} +#endif -static int match_route(uint8_t * src_mac, - uint8_t * dst_mac, - link_type_t src_type, - int src_index, - int * matches) { - int values[MAX_ROUTES]; - int matched_routes[MAX_ROUTES]; - - int num_matches = 0; - int i; - int max = 0; - int no = 0; - int exact_match = 0; - - for(i = 0; i < MAX_ROUTES; i++) { - if (g_routes.routes[i] != NULL){ - if ( (g_routes.routes[i]->src_type != LINK_ANY) && - ( (g_routes.routes[i]->src_type != src_type) || - ( (g_routes.routes[i]->src_link_idx != src_index) && - (g_routes.routes[i]->src_link_idx != -1)))) { - PrintDebug("Vnet: MatchRoute: Source route is on and does not match\n"); - continue; - } - - if ( (g_routes.routes[i]->dest_mac_qual == MAC_ANY) && - (g_routes.routes[i]->src_mac_qual == MAC_ANY)) { + 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) + + + 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; + } - matched_routes[num_matches] = i; - values[num_matches] = 3; - num_matches++; - } - - if (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) { - if (g_routes.routes[i]->src_mac_qual != MAC_NOT) { - if (g_routes.routes[i]->dest_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - values[num_matches] = 6; - - num_matches++; - } else if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) { - if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) { - matched_routes[num_matches] = i; - values[num_matches] = 8; - exact_match = 1; - num_matches++; - } - } - } - } - - if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) { - if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) { - if (g_routes.routes[i]->src_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - values[num_matches] = 6; - - num_matches++; - } else if (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) { - if (g_routes.routes[i]->src_mac_qual != MAC_NOT) { - if (exact_match == 0) { - matched_routes[num_matches] = i; - values[num_matches] = 8; - num_matches++; - } - } - } - } - } + + if ((route_def->dst_mac_qual == MAC_ANY) && + (route_def->src_mac_qual == MAC_ANY)) { + UPDATE_MATCHES(3); + } - if ( (g_routes.routes[i]->dest_mac_qual == MAC_NOT) && - (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) != 0)) { - if (g_routes.routes[i]->src_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - values[num_matches] = 5; - num_matches++; - } else if (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) { - if (g_routes.routes[i]->src_mac_qual != MAC_NOT) { - matched_routes[num_matches] = i; - values[num_matches] = 7; - num_matches++; - } - } + 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 ( (g_routes.routes[i]->src_mac_qual == MAC_NOT) && - (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) != 0)) { - if (g_routes.routes[i]->dest_mac_qual == MAC_ANY) { - matched_routes[num_matches] = i; - values[num_matches] = 5; - num_matches++; - } else if (memcmp((void *)&g_routes.routes[i]->dest_mac, (void *)dst_mac, 6) == 0) { - if (g_routes.routes[i]->dest_mac_qual != MAC_NOT) { - matched_routes[num_matches] = i; - values[num_matches] = 7; - num_matches++; - } + 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); } } - } - } // end for - - for (i = 0; i < MAX_ROUTES; i++) { - if ( (memcmp((void *)&g_routes.routes[i]->src_mac, (void *)src_mac, 6) == 0) && - (g_routes.routes[i]->dest_mac_qual == MAC_NONE) && - ( (g_routes.routes[i]->src_type == LINK_ANY) || - ( (g_routes.routes[i]->src_type == src_type) && - ( (g_routes.routes[i]->src_link_idx == src_index) || - (g_routes.routes[i]->src_link_idx == -1))))) { - matched_routes[num_matches] = i; - values[num_matches] = 4; - PrintDebug("Vnet: MatchRoute: We matched a default route (%d)\n", i); - num_matches++; - } - } - - //If many rules have been matched, we choose one which has the highest value rating - if (num_matches == 0) { - return 0; - } - - for (i = 0; i < num_matches; i++) { - if (values[i] > max) { - no = 0; - max = values[i]; - matches[no] = matched_routes[i]; - no++; - } else if (values[i] == max) { - matches[no] = matched_routes[i]; - no++; - } - } - - return no; -} - -#if 0 -// TODO: To be removed -static int process_udpdata() -{ - struct ethernet_pkt * pt; - - uint32_t dest = 0; - uint16_t remote_port = 0; - SOCK link_sock = g_udp_sockfd; - int length = sizeof(struct ethernet_pkt) - (2 * sizeof(int)); //minus the "size" and "type" - - //run in a loop to get packets from outside network, adding them to the incoming packet queue - while (1) { - pt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt)); - - if (pt == NULL){ - PrintError("Vnet: process_udp: Malloc fails\n"); - continue; + } + + 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); + } } - PrintDebug("Vnet: route_thread: socket: [%d]. ready to receive from ip [%x], port [%d] or from VMs\n", link_sock, (uint_t)dest, remote_port); - pt->size = V3_RecvFrom_IP( link_sock, dest, remote_port, pt->data, length); - PrintDebug("Vnet: route_thread: socket: [%d] receive from ip [%x], port [%d]\n", link_sock, (uint_t)dest, remote_port); - - if (pt->size <= 0) { - PrintDebug("Vnet: process_udp: receiving packet from UDP fails\n"); - V3_Free(pt); - return -1; + 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); + } } - PrintDebug("Vnet: process_udp: get packet\n"); - print_packet(pt->data, pt->size); + // Default route + if ( (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) && + (route_def->dst_mac_qual == MAC_NONE)) { + UPDATE_MATCHES(4); + } } -} -// TODO: To be removed -static int indata_handler( ) -{ - if (!use_tcp) { - process_udpdata(); + PrintDebug("Vnet: match_route: Matches=%d\n", num_matches); + + if (num_matches == 0) { + return NULL; } - return 0; -} + matches = V3_Malloc(sizeof(struct route_list) + + (sizeof(struct vnet_route_info *) * num_matches)); -// TODO: To be removed -static int start_recv_data() -{ - if (use_tcp){ - - } else { - SOCK udp_data_socket; - - if ((udp_data_socket = V3_Create_UDP_Socket()) < 0){ - PrintError("VNET: Can't setup udp socket\n"); - return -1; - } - PrintDebug("Vnet: vnet_setup_udp: get socket: %d\n", udp_data_socket); - g_udp_sockfd = udp_data_socket; - - store_topologies(udp_data_socket); - - if (V3_Bind_Socket(udp_data_socket, vnet_udp_port) < 0){ - PrintError("VNET: Can't bind socket\n"); - return -1; + matches->num_routes = num_matches; + + { + int i = 0; + list_for_each_entry(route, &match_list, match_node) { + matches->routes[i++] = route; } - PrintDebug("VNET: vnet_setup_udp: bind socket successful\n"); } - - V3_CREATE_THREAD(&indata_handler, NULL, "VNET_DATA_HANDLER"); - return 0; -} - -static void store_test_topologies(SOCK fd) -{ - int i; - int src_mac_qual = MAC_ANY; - int dest_mac_qual = MAC_ANY; - uint_t dest; -#ifndef VNET_SERVER - dest = (0 | 172 << 24 | 23 << 16 | 1 ); - PrintDebug("VNET: store_topologies. NOT VNET_SERVER, dest = %x\n", dest); -#else - dest = (0 | 172 << 24 | 23 << 16 | 2 ); - PrintDebug("VNET: store_topologies. VNET_SERVER, dest = %x\n", dest); -#endif - int type = UDP_TYPE; - int src = 0; - int src_type= LINK_ANY; //ANY_SRC_TYPE - int data_port = 22; + return matches; } -#endif -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 +int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data) { + struct route_list * matched_routes = NULL; + unsigned long flags; int i; - 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]; - - // 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->data); + char dest_str[30]; + char src_str[30]; + + mac_to_string(hdr->src_mac, src_str); + mac_to_string(hdr->dst_mac, dest_str); + PrintDebug("Vnet: HandleDataOverLink. SRC(%s), DEST(%s)\n", src_str, dest_str); + } #endif - // link_edge -> pt->type??? - 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) { - // no match + flags = v3_lock_irqsave(vnet_state.lock); - num_matched_routes = match_route(src_mac, dst_mac, LINK_ANY, src_link_index, matches); + look_into_cache(pkt, &matched_routes); + + if (matched_routes == NULL) { + PrintDebug("Vnet: can not find route in cache, looking into routing table\n"); - if (num_matched_routes > 0) { - add_route_to_cache(hash_key, num_matched_routes,matches); + matched_routes = match_route(pkt); + + if (matched_routes) { + add_route_to_cache(pkt, matched_routes); + } else { + PrintDebug("Could not find route for packet...\n"); + v3_unlock_irqrestore(vnet_state.lock, flags); + return -1; } } - - PrintDebug("Vnet: HandleDataOverLink: Matches=%d\n", num_matched_routes); - - for (i = 0; i < num_matched_routes; i++) { - int route_index = -1; - int link_index = -1; - int pkt_len = 0; - struct link_entry * link = NULL; - route_index = matches[i]; - - PrintDebug("Vnet: HandleDataOverLink: Forward packet from link according to Route entry %d\n", route_index); - - link_index = g_routes.routes[route_index]->link_idx; + v3_unlock_irqrestore(vnet_state.lock, flags); - if ( (link_index < 0) || - (link_index > MAX_LINKS) || - (g_links.links[link_index] == NULL)) { - continue; - } - - link = g_links.links[link_index]; - - pkt_len = pkt->size; + PrintDebug("Vnet: HandleOnePacket: route matches %d\n", matched_routes->num_routes); - if (g_routes.routes[route_index]->link_type == LINK_EDGE) { - - // TODO: apply the header in the beginning of the packet to be sent - if ((link->dst_link->input(pkt->data, pkt_len, NULL)) != pkt_len) { - PrintError("LEI -- WHAT IS THE ERROR HERE?\n"); - return -1; - } - } else if (g_routes.routes[route_index]->link_type == LINK_INTERFACE) { - if ((link->dst_link->input(pkt->data, pkt_len, NULL)) != pkt_len) { - PrintError("LEI -- WHAT IS THE ERROR HERE?\n"); - return -1; - } + for (i = 0; i < matched_routes->num_routes; i++) { + struct vnet_route_info * route = matched_routes->routes[i]; + + if (route->route_def.dst_type == LINK_EDGE) { + pkt->dst_type = LINK_EDGE; + pkt->dst_id = route->route_def.dst_id; + + if (vnet_state.bridge == NULL) { + PrintDebug("VNET: No bridge to sent data to links\n"); + continue; + } + + if (vnet_state.bridge->input(vnet_state.bridge->vm, pkt, vnet_state.bridge->private_data) == -1) { + PrintDebug("VNET: Packet not sent properly\n"); + continue; + } + + } else if (route->route_def.dst_type == LINK_INTERFACE) { + if (route->dst_dev->input(route->dst_dev->vm, pkt, route->dst_dev->private_data) == -1) { + PrintDebug("VNET: Packet not sent properly\n"); + continue; + } } else { - PrintError("Vnet: Wrong Edge type\n"); - return -1; + PrintDebug("Vnet: Wrong Edge type\n"); + continue; } - } - - return 0; -} - -static int send_ethernet_pkt(char * buf, int length) { - struct ethernet_pkt * pkt; - - pkt = (struct ethernet_pkt *)V3_Malloc(sizeof(struct ethernet_pkt)); - ethernet_packet_init(pkt, buf, length); //====here we copy sending data once - - PrintDebug("VNET: vm_send_pkt: transmitting packet: (size:%d)\n", (int)pkt->size); - print_packet((char *)buf, length); - - v3_enqueue(g_inpkt_q, (addr_t)pkt); - - return 0; -} - -int v3_vnet_send_pkt(uchar_t * buf, int length) { - PrintDebug("VNET: In V3_Send_pkt: pkt length %d\n", length); - - return send_ethernet_pkt((char *)buf, length); -} - -static int search_device(char * device_name) { - int i; - for (i = 0; i < MAX_LINKS; i++) { - if ((g_links.links[i] != NULL) && (g_links.links[i]->type == LINK_INTERFACE)) { - if (strcmp(device_name, g_links.links[i]->dst_dev->name) == 0) { - return i; - } - } + PrintDebug("Vnet: HandleOnePacket: Forward packet according to Route\n"); } - PrintError("LEI -- WHAT IS THE ERROR HERE?\n"); - return -1; + return 0; } -static int vnet_register_device(struct vm_device * vdev, - char * dev_name, - uchar_t mac[6], - int (*netif_input)(uchar_t * pkt, uint_t size, void * private_data), - void * data) { - struct vnet_if_device * if_dev; +int v3_vnet_add_dev(struct v3_vm_info *vm, uint8_t mac[6], + int (*netif_input)(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data), + void * priv_data){ + struct vnet_dev * new_dev = NULL; + unsigned long flags; - int idx = search_device(dev_name); + new_dev = (struct vnet_dev *)V3_Malloc(sizeof(struct vnet_dev)); - if (idx != -1) { - PrintError("LEI -- WHAT IS THE ERROR HERE?\n"); - return -1; - } - - if_dev = (struct vnet_if_device *)V3_Malloc(sizeof(struct vnet_if_device)); - - if (if_dev == NULL) { + if (new_dev == NULL) { PrintError("VNET: Malloc fails\n"); return -1; } - - strcpy(if_dev->name, dev_name); - strncpy(if_dev->mac_addr, mac, 6); - if_dev->dev = vdev; - if_dev->input = netif_input; - if_dev->private_data = data; - - struct link_entry * link = (struct link_entry *)V3_Malloc(sizeof(struct link_entry)); - - link->type = LINK_INTERFACE; - link->dst_dev = if_dev; - - idx = add_link_entry(link); - - return idx; -} + + memcpy(new_dev->mac_addr, mac, 6); + new_dev->input = netif_input; + new_dev->private_data = priv_data; + new_dev->vm = vm; + new_dev->dev_id = 0; -static int vnet_unregister_device(char * dev_name) { - int idx; + flags = v3_lock_irqsave(vnet_state.lock); - idx = search_device(dev_name); - - if (idx == -1) { - PrintError("LEI -- WHAT IS THE ERROR HERE?\n"); - return -1; + if (!find_dev_by_mac(mac)) { + list_add(&(new_dev->node), &(vnet_state.devs)); + new_dev->dev_id = ++vnet_state.num_devs; } - struct vnet_if_device * device = (struct vnet_if_device *)delete_link_entry(idx); - if (device == NULL) { - PrintError("LEI -- WHAT IS THE ERROR HERE?\n"); + v3_unlock_irqrestore(vnet_state.lock, flags); + + // 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; } - V3_Free(device); + PrintDebug("Vnet: Add Device: dev_id %d, input : %p, private_data %p\n", + new_dev->dev_id, new_dev->input, new_dev->private_data); - return idx; + return new_dev->dev_id; } -int v3_vnet_pkt_process() { - struct ethernet_pkt * pkt; - PrintDebug("VNET: In vnet_check\n"); - - while ((pkt = (struct ethernet_pkt *)v3_dequeue(g_inpkt_q)) != NULL) { - PrintDebug("VNET: In vnet_check: pt length %d, pt type %d\n", (int)pkt->size, (int)pkt->type); - v3_hexdump(pkt->data, pkt->size, NULL, 0); - - if (handle_one_pkt(pkt)) { - PrintDebug("VNET: vnet_check: handle one packet!\n"); - } else { - PrintError("VNET: vnet_check: fail to forward one packet, discard it!\n"); - } - - V3_Free(pkt); // be careful here - } +int v3_vnet_add_bridge(struct v3_vm_info * vm, + int (*input)(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data), + void * priv_data) { + unsigned long flags; + int bridge_free = 0; + struct vnet_brg_dev * tmp_bridge = NULL; - return 0; -} - - -static void init_empty_link_table() { - int i; + + flags = v3_lock_irqsave(vnet_state.lock); - for (i = 0; i < MAX_LINKS; i++) { - g_links.links[i] = NULL; + if (vnet_state.bridge == NULL) { + bridge_free = 1; + vnet_state.bridge = (void *)1; } - g_links.size = 0; -} + v3_unlock_irqrestore(vnet_state.lock, flags); -static void init_empty_route_table() { - int i; - - for (i = 0; i < MAX_ROUTES; i++) { - g_routes.routes[i] = NULL; + if (bridge_free == 0) { + PrintError("Bridge already set\n"); + return -1; } - g_links.size = 0; -} - -static void init_tables() { - init_empty_link_table(); - init_empty_route_table(); - init_route_cache(); -} - -static void init_pkt_queue() { - PrintDebug("VNET Init package receiving queue\n"); - - g_inpkt_q = v3_create_queue(); - v3_init_queue(g_inpkt_q); -} - -#if 0 -// TODO: -static int init_routing_tables(struct routing_entry *route_tab, uint16_t size) -{ - //struct routing_entry *route; - - - return 0; -} + tmp_bridge = (struct vnet_brg_dev *)V3_Malloc(sizeof(struct vnet_brg_dev)); + if (tmp_bridge == NULL) { + PrintError("Malloc Fails\n"); + return -1; + } + + tmp_bridge->vm = vm; + tmp_bridge->input = input; + tmp_bridge->private_data = priv_data; -// TODO: -static int init_link_tables(struct link_entry *link_tab, uint16_t size) -{ - //struct link_entry *link; + // 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); return 0; } -#endif +int V3_init_vnet() { + + INIT_LIST_HEAD(&(vnet_state.routes)); + INIT_LIST_HEAD(&(vnet_state.devs)); -struct table_init_info { - addr_t routing_table_start; - uint16_t routing_table_size; - addr_t link_table_start; - uint16_t link_table_size; -}; + vnet_state.num_devs = 0; + vnet_state.num_routes = 0; -static int handle_init_tables_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) { - uint8_t * buf = NULL; - addr_t info_addr = (addr_t)info->vm_regs.rcx; + PrintDebug("VNET: Links and Routes tables initiated\n"); - if (guest_va_to_host_va(info, info_addr, (addr_t *)&(buf)) == -1) { - PrintError("Could not translate buffer address\n"); - return -1; + if (v3_lock_init(&(vnet_state.lock)) == -1){ + PrintError("VNET: Failure to init lock for routes table\n"); } - //struct table_init_info *init_info = (struct table_init_info *)buf; - - return 0; -} - + PrintDebug("VNET: Locks initiated\n"); -void v3_vnet_init(struct guest_info * vm) { - init_tables(); - init_pkt_queue(); - - v3_register_hypercall(vm, VNET_INITAB_HCALL, handle_init_tables_hcall, NULL); + vnet_state.inpkt_q = v3_create_queue(); + v3_init_queue(vnet_state.inpkt_q); + PrintDebug("VNET: Receiving queue initiated\n"); - //store_test_topologies(udp_data_socket); + vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq); - PrintDebug("VNET Initialized\n"); -} + if (vnet_state.route_cache == NULL) { + PrintError("Vnet: Route Cache Init Fails\n"); + return -1; + } + PrintDebug("VNET: initiated\n"); + return 0; +}