2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2009, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2009, Yuan Tang <ytang@northwestern.edu>
12 * Copyright (c) 2009, The V3VEE Project <http://www.v3vee.org>
13 * All rights reserved.
15 * Author: Lei Xia <lxia@northwestern.edu>
16 * Yuan Tang <ytang@northwestern.edu>
18 * This is free software. You are permitted to use,
19 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
22 #include <palacios/vmm_vnet.h>
23 #include <palacios/vm_guest_mem.h>
24 #include <palacios/vmm_lock.h>
25 #include <palacios/vmm_queue.h>
26 #include <palacios/vmm_sprintf.h>
28 #ifndef CONFIG_DEBUG_VNET
30 #define PrintDebug(fmt, args...)
38 uint16_t type; // indicates layer 3 protocol type
39 } __attribute__((packed));
48 struct v3_vm_info * vm;
50 int (*input)(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data);
54 struct list_head node;
55 } __attribute__((packed));
61 struct vnet_route_info {
62 struct v3_vnet_route route_def;
64 struct vnet_dev * dst_dev;
65 struct vnet_dev * src_dev;
67 struct list_head node;
68 struct list_head match_node; // used for route matching
75 uint8_t hash_buf[VNET_HASH_SIZE];
78 struct vnet_route_info * routes[0];
79 } __attribute__((packed));
84 struct list_head routes;
85 struct list_head devs;
92 struct gen_queue * inpkt_q;
93 struct hashtable * route_cache;
100 #ifdef CONFIG_DEBUG_VNET
101 static inline void mac_to_string(char mac[6], char * buf) {
102 snprintf(buf, 20, "%02x:%02x:%02x:%02x:%02x:%02x",
103 mac[0], mac[1], mac[2],
104 mac[3], mac[4], mac[5]);
111 * A VNET packet is a packed struct with the hashed fields grouped together.
112 * This means we can generate the hash from an offset into the pkt struct
114 static inline uint_t hash_fn(addr_t hdr_ptr) {
115 uint8_t * hdr_buf = (uint8_t *)&(hdr_ptr);
117 return v3_hash_buffer(hdr_buf, VNET_HASH_SIZE);
120 static inline int hash_eq(addr_t key1, addr_t key2) {
121 return (memcmp((uint8_t *)key1, (uint8_t *)key2, VNET_HASH_SIZE) == 0);
125 static int add_route_to_cache(struct v3_vnet_pkt * pkt, struct route_list * routes) {
126 memcpy(routes->hash_buf, pkt->hash_buf, VNET_HASH_SIZE);
128 if (v3_htable_insert(vnet_state.route_cache, (addr_t)routes->hash_buf, (addr_t)routes) == 0) {
129 PrintError("Vnet: Failed to insert new route entry to the cache\n");
136 static int clear_hash_cache() {
138 v3_free_htable(vnet_state.route_cache, 1, 1);
139 vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
144 static int look_into_cache(struct v3_vnet_pkt * pkt, struct route_list ** routes) {
146 *routes = (struct route_list *)v3_htable_search(vnet_state.route_cache, (addr_t)pkt);
152 struct vnet_dev * find_dev_by_id(int idx) {
153 struct vnet_dev * dev = NULL;
155 list_for_each_entry(dev, &(vnet_state.devs), node) {
156 int dev_id = dev->dev_id;
165 static struct vnet_dev * find_dev_by_mac(char * name) {
166 struct vnet_dev * dev = NULL;
168 list_for_each_entry(dev, &(vnet_state.devs), node) {
169 if (!memcmp(dev->mac_addr, name, 6))
177 int v3_vnet_add_route(struct v3_vnet_route route) {
178 struct vnet_route_info * new_route = NULL;
181 new_route = (struct vnet_route_info *)V3_Malloc(sizeof(struct vnet_route_info));
182 memset(new_route, 0, sizeof(struct vnet_route_info));
184 PrintDebug("Vnet: vnet_add_route_entry\n");
186 new_route->route_def = route;
188 /* TODO: Find devices */
189 if (new_route->route_def.dst_type == LINK_INTERFACE) {
190 new_route->dst_dev = find_dev_by_id(new_route->route_def.dst_id);
193 if (new_route->route_def.src_type == LINK_INTERFACE) {
194 new_route->src_dev = find_dev_by_id(new_route->route_def.src_id);
197 flags = v3_lock_irqsave(vnet_state.lock);
198 list_add(&(new_route->node), &(vnet_state.routes));
199 v3_unlock_irqrestore(vnet_state.lock, flags);
208 // At the end allocate a route_list
209 // This list will be inserted into the cache so we don't need to free it
210 static struct route_list * match_route(struct v3_vnet_pkt * pkt) {
211 struct vnet_route_info * route = NULL;
212 struct route_list * matches = NULL;
215 struct list_head match_list;
216 struct eth_hdr * hdr = (struct eth_hdr *)(pkt->data);
217 uint8_t src_type = pkt->src_type;
218 uint32_t src_link = pkt->src_id;
220 #ifdef CONFIG_DEBUG_VNET
225 mac_to_string(hdr->src_mac, src_str);
226 mac_to_string(hdr->dst_mac, dst_str);
227 PrintDebug("Vnet: match_route. pkt: SRC(%s), DEST(%s)\n", src_str, dst_str);
231 INIT_LIST_HEAD(&match_list);
233 #define UPDATE_MATCHES(rank) do { \
234 if (max_rank < (rank)) { \
236 INIT_LIST_HEAD(&match_list); \
238 list_add(&(route->match_node), &match_list); \
240 } else if (max_rank == (rank)) { \
241 list_add(&(route->match_node), &match_list); \
247 list_for_each_entry(route, &(vnet_state.routes), node) {
248 struct v3_vnet_route * route_def = &(route->route_def);
250 // CHECK SOURCE TYPE HERE
251 if ( (route_def->src_type != LINK_ANY) &&
252 ( (route_def->src_type != src_type) ||
253 ( (route_def->src_id != src_link) &&
254 (route_def->src_id != (uint32_t)-1)))) {
259 if ((route_def->dst_mac_qual == MAC_ANY) &&
260 (route_def->src_mac_qual == MAC_ANY)) {
264 if (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) {
265 if (route_def->src_mac_qual != MAC_NOT) {
266 if (route_def->dst_mac_qual == MAC_ANY) {
268 } else if (route_def->dst_mac_qual != MAC_NOT &&
269 memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) {
275 if (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) {
276 if (route_def->dst_mac_qual != MAC_NOT) {
277 if (route_def->src_mac_qual == MAC_ANY) {
279 } else if ((route_def->src_mac_qual != MAC_NOT) &&
280 (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) {
286 if ((route_def->dst_mac_qual == MAC_NOT) &&
287 (memcmp(route_def->dst_mac, hdr->dst_mac, 6) != 0)) {
288 if (route_def->src_mac_qual == MAC_ANY) {
290 } else if ((route_def->src_mac_qual != MAC_NOT) &&
291 (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) {
296 if ((route_def->src_mac_qual == MAC_NOT) &&
297 (memcmp(route_def->src_mac, hdr->src_mac, 6) != 0)) {
298 if (route_def->dst_mac_qual == MAC_ANY) {
300 } else if ((route_def->dst_mac_qual != MAC_NOT) &&
301 (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0)) {
307 if ( (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) &
308 (route_def->dst_mac_qual == MAC_NONE)) {
313 PrintDebug("Vnet: match_route: Matches=%d\n", num_matches);
315 if (num_matches == 0) {
319 matches = V3_Malloc(sizeof(struct route_list) +
320 (sizeof(struct vnet_route_info *) * num_matches));
322 matches->num_routes = num_matches;
326 list_for_each_entry(route, &match_list, node) {
327 matches->routes[i++] = route;
334 static int handle_one_pkt(struct v3_vnet_pkt * pkt) {
335 struct route_list * matched_routes = NULL;
340 #ifdef CONFIG_DEBUG_VNET
342 struct eth_hdr * hdr = (struct eth_hdr *)(pkt->data);
346 mac_to_string(hdr->src_mac, src_str);
347 mac_to_string(hdr->dst_mac, dest_str);
348 PrintDebug("Vnet: HandleDataOverLink. SRC(%s), DEST(%s)\n", src_str, dest_str);
352 flags = v3_lock_irqsave(vnet_state.lock);
354 look_into_cache(pkt, &matched_routes);
356 if (matched_routes == NULL) {
357 matched_routes = match_route(pkt);
359 if (matched_routes) {
360 add_route_to_cache(pkt, matched_routes);
362 PrintError("Could not find route for packet...\n");
363 v3_unlock_irqrestore(vnet_state.lock, flags);
368 v3_unlock_irqrestore(vnet_state.lock, flags);
371 for (i = 0; i < matched_routes->num_routes; i++) {
372 struct vnet_route_info * route = matched_routes->routes[i];
374 if (route->route_def.dst_type == LINK_EDGE) {
376 } else if (route->route_def.dst_type == LINK_INTERFACE) {
377 if (route->dst_dev->input(route->dst_dev->vm, pkt, route->dst_dev->private_data) == -1) {
378 PrintDebug("VNET: Packet not sent properly\n");
382 PrintDebug("Vnet: Wrong Edge type\n");
386 PrintDebug("Vnet: HandleDataOverLink: Forward packet according to Route\n");
392 int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt) {
394 PrintDebug("In Vnet Send: pkt size: %d\n", pkt->size);
396 if (handle_one_pkt(pkt) != -1) {
397 PrintDebug("VNET: send one packet! pt length %d\n", pkt->size);
399 PrintDebug("VNET: Fail to forward one packet, discard it!\n");
405 int v3_vnet_add_dev(struct v3_vm_info *vm,uint8_t mac[6],
406 int (*netif_input)(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data),
408 struct vnet_dev * new_dev = NULL;
410 new_dev = find_dev_by_mac(mac);
412 PrintDebug("VNET: register device\n");
415 PrintDebug("VNET: register device: Already has device with the same mac\n");
419 new_dev = (struct vnet_dev *)V3_Malloc(sizeof(struct vnet_dev));
421 if (new_dev == NULL) {
422 PrintError("VNET: Malloc fails\n");
426 memcpy(new_dev->mac_addr, mac, 6);
427 new_dev->input = netif_input;
428 new_dev->private_data = priv_data;
431 PrintDebug("VNET: register device new_dev22 %p\n", (void *)new_dev);
433 list_add(&(new_dev->node), &(vnet_state.devs));
434 vnet_state.num_devs ++;
435 new_dev->dev_id = vnet_state.num_devs;
441 static int v3_vnet_pkt_process() {
442 struct v3_vnet_pkt * pkt = NULL;
444 while ((pkt = (struct v3_vnet_pkt *)v3_dequeue(vnet_state.inpkt_q)) != NULL) {
445 if (handle_one_pkt(pkt) != -1) {
446 PrintDebug("VNET: vnet_check: handle one packet! pt length %d\n", (int)pkt->size);
448 PrintDebug("VNET: vnet_check: Fail to forward one packet, discard it!\n");
451 V3_Free(pkt); // be careful here
460 INIT_LIST_HEAD(&(vnet_state.routes));
461 INIT_LIST_HEAD(&(vnet_state.devs));
463 vnet_state.num_devs = 0;
464 vnet_state.num_routes = 0;
466 PrintDebug("VNET: Links and Routes tables initiated\n");
468 if (v3_lock_init(&(vnet_state.lock)) == -1){
469 PrintError("VNET: Failure to init lock for routes table\n");
472 PrintDebug("VNET: Locks initiated\n");
474 /*initial pkt receiving queue */
475 vnet_state.inpkt_q = v3_create_queue();
476 v3_init_queue(vnet_state.inpkt_q);
477 PrintDebug("VNET: Receiving queue initiated\n");
479 vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
481 if (vnet_state.route_cache == NULL) {
482 PrintError("Vnet: Route Cache Init Fails\n");
486 PrintDebug("VNET: initiated\n");