5 #include <asm/uaccess.h>
6 #include <linux/inet.h>
7 #include <linux/kthread.h>
8 #include <linux/netdevice.h>
11 #include <linux/string.h>
12 #include <linux/preempt.h>
13 #include <linux/sched.h>
14 #include <linux/if_packet.h>
15 #include <linux/errno.h>
18 #include <interfaces/vmm_packet.h>
19 #include <palacios/vmm_host_events.h>
20 #include <vnet/vnet.h>
24 #include <palacios/vmm_hashtable.h>
25 #include <palacios/vmm_ethernet.h>
29 #include "linux-exts.h"
31 struct palacios_packet_state {
32 struct socket * raw_sock;
35 struct hashtable * mac_vm_cache;
36 struct task_struct * server_thread;
39 static struct palacios_packet_state packet_state;
41 static inline uint_t hash_fn(addr_t hdr_ptr) {
42 uint8_t * hdr_buf = (uint8_t *)hdr_ptr;
44 return v3_hash_buffer(hdr_buf, ETH_ALEN);
47 static inline int hash_eq(addr_t key1, addr_t key2) {
48 return (memcmp((uint8_t *)key1, (uint8_t *)key2, ETH_ALEN) == 0);
52 static int palacios_packet_add_recver(const char * mac,
53 struct v3_vm_info * vm){
56 key = (char *)kmalloc(ETH_ALEN, GFP_KERNEL);
57 memcpy(key, mac, ETH_ALEN);
59 if (v3_htable_insert(packet_state.mac_vm_cache, (addr_t)key, (addr_t)vm) == 0) {
60 printk("Palacios Packet: Failed to insert new mac entry to the hash table\n");
64 printk("Packet: Add MAC: %2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
69 static int palacios_packet_del_recver(const char * mac,
70 struct v3_vm_info * vm){
75 static int init_raw_socket(const char * eth_dev){
77 struct sockaddr_ll sock_addr;
81 err = sock_create(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL), &(packet_state.raw_sock));
84 printk(KERN_WARNING "Could not create a PF_PACKET Socket, err %d\n", err);
89 eth_dev = "eth0"; /* default "eth0" */
92 memset(&if_req, 0, sizeof(if_req));
93 strncpy(if_req.ifr_name, eth_dev, IFNAMSIZ); //sizeof(if_req.ifr_name));
95 err = packet_state.raw_sock->ops->ioctl(packet_state.raw_sock, SIOCGIFINDEX, (long)&if_req);
98 printk(KERN_WARNING "Palacios Packet: Unable to get index for device %s, error %d\n",
99 if_req.ifr_name, err);
100 dev_idx = 2; /* match ALL 2:"eth0" */
102 dev_idx = if_req.ifr_ifindex;
105 printk(KERN_INFO "Palacios Packet: bind to device index: %d\n", dev_idx);
107 memset(&sock_addr, 0, sizeof(sock_addr));
108 sock_addr.sll_family = PF_PACKET;
109 sock_addr.sll_protocol = htons(ETH_P_ALL);
110 sock_addr.sll_ifindex = dev_idx;
112 err = packet_state.raw_sock->ops->bind(packet_state.raw_sock,
113 (struct sockaddr *)&sock_addr,
117 printk(KERN_WARNING "Error binding raw packet to device %s, %d\n", eth_dev, err);
121 printk(KERN_INFO "Bind palacios raw packet interface to device %s\n", eth_dev);
128 palacios_packet_send(const char * pkt, unsigned int len, void * private_data) {
134 iov.iov_base = (void *)pkt;
135 iov.iov_len = (__kernel_size_t)len;
139 msg.msg_control = NULL;
140 msg.msg_controllen = 0;
147 size = sock_sendmsg(packet_state.raw_sock, &msg, len);
155 static struct v3_packet_hooks palacios_packet_hooks = {
156 .send = palacios_packet_send,
157 .add_recver = palacios_packet_add_recver,
158 .del_recver = palacios_packet_del_recver,
163 recv_pkt(char * pkt, int len) {
169 if (packet_state.raw_sock == NULL) {
179 msg.msg_control = NULL;
180 msg.msg_controllen = 0;
183 msg.msg_control = NULL;
187 size = sock_recvmsg(packet_state.raw_sock, &msg, len, msg.msg_flags);
195 send_raw_packet_to_palacios(char * pkt,
197 struct v3_vm_info * vm) {
198 struct v3_packet_event event;
199 char data[ETHERNET_PACKET_LEN];
201 /* one memory copy */
202 memcpy(data, pkt, len);
206 v3_deliver_packet_event(vm, &event);
209 static int packet_server(void * arg) {
210 char pkt[ETHERNET_PACKET_LEN];
212 struct v3_vm_info *vm;
214 printk("Palacios Raw Packet Bridge: Staring receiving server\n");
216 while (!kthread_should_stop()) {
217 size = recv_pkt(pkt, ETHERNET_PACKET_LEN);
220 printk(KERN_WARNING "Palacios raw packet receive error, Server terminated\n");
225 /* if VNET is enabled, send to VNET */
229 /* if it is broadcast or multicase packet */
233 vm = (struct v3_vm_info *)v3_htable_search(packet_state.mac_vm_cache, (addr_t)pkt);
236 printk("Find destinated VM 0x%p\n", vm);
237 send_raw_packet_to_palacios(pkt, size, vm);
245 static int packet_init( void ) {
247 const char * eth_dev = NULL;
249 if (packet_state.inited == 0){
250 packet_state.inited = 1;
252 if (init_raw_socket(eth_dev) == -1){
253 printk("Error to initiate palacios packet interface\n");
257 V3_Init_Packet(&palacios_packet_hooks);
259 packet_state.mac_vm_cache = v3_create_htable(0, &hash_fn, &hash_eq);
261 packet_state.server_thread = kthread_run(packet_server, NULL, "raw-packet-server");
265 // REGISTER GLOBAL CONTROL to add interfaces...
270 static int packet_deinit( void ) {
273 kthread_stop(packet_state.server_thread);
274 packet_state.raw_sock->ops->release(packet_state.raw_sock);
275 v3_free_htable(packet_state.mac_vm_cache, 0, 1);
276 packet_state.inited = 0;
283 static struct linux_ext pkt_ext = {
284 .name = "PACKET_INTERFACE",
286 .deinit = packet_deinit,
292 register_extension(&pkt_ext);