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 <palacios/vmm_vnet.h>
21 #include <palacios/vmm_ethernet.h>
23 /* We should be able to use type define from Palacios header files */
24 typedef unsigned char uchar_t;
25 typedef unsigned int uint_t;
26 typedef unsigned long long ullong_t;
27 typedef unsigned long ulong_t;
28 typedef ulong_t addr_t;
31 #include <palacios/vmm_hashtable.h>
35 #include "palacios-packet.h"
37 struct palacios_packet_state {
38 struct socket * raw_sock;
41 struct hashtable * mac_vm_cache;
42 struct task_struct * server_thread;
45 static struct palacios_packet_state packet_state;
47 static inline uint_t hash_fn(addr_t hdr_ptr) {
48 uint8_t * hdr_buf = (uint8_t *)hdr_ptr;
50 return v3_hash_buffer(hdr_buf, ETH_ALEN);
53 static inline int hash_eq(addr_t key1, addr_t key2) {
54 return (memcmp((uint8_t *)key1, (uint8_t *)key2, ETH_ALEN) == 0);
58 static int palacios_packet_add_recver(const char * mac,
59 struct v3_vm_info * vm){
62 key = (char *)kmalloc(ETH_ALEN, GFP_KERNEL);
63 memcpy(key, mac, ETH_ALEN);
65 if (v3_htable_insert(packet_state.mac_vm_cache, (addr_t)key, (addr_t)vm) == 0) {
66 printk("Palacios Packet: Failed to insert new mac entry to the hash table\n");
70 printk("Packet: Add MAC: %2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
75 static int palacios_packet_del_recver(const char * mac,
76 struct v3_vm_info * vm){
81 static int init_raw_socket (const char * eth_dev){
83 struct sockaddr_ll sock_addr;
87 err = sock_create(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL), &(packet_state.raw_sock));
89 printk(KERN_WARNING "Could not create a PF_PACKET Socket, err %d\n", err);
94 eth_dev = "eth0"; /* default "eth0" */
97 memset(&if_req, 0, sizeof(if_req));
98 strncpy(if_req.ifr_name, eth_dev, IFNAMSIZ); //sizeof(if_req.ifr_name));
99 err = packet_state.raw_sock->ops->ioctl(packet_state.raw_sock, SIOCGIFINDEX, (long)&if_req);
101 printk(KERN_WARNING "Palacios Packet: Unable to get index for device %s, error %d\n", if_req.ifr_name, err);
102 dev_idx = 2; /* match ALL 2:"eth0" */
105 dev_idx = if_req.ifr_ifindex;
108 printk(KERN_INFO "Palacios Packet: bind to device index: %d\n", dev_idx);
110 memset(&sock_addr, 0, sizeof(sock_addr));
111 sock_addr.sll_family = PF_PACKET;
112 sock_addr.sll_protocol = htons(ETH_P_ALL);
113 sock_addr.sll_ifindex = dev_idx;
115 err = packet_state.raw_sock->ops->bind(packet_state.raw_sock, (struct sockaddr *)&sock_addr, sizeof(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);
152 printk("Palacios Packet: send pkt to NIC (size: %d)\n",
154 print_hex_dump(NULL, "pkt_header: ", 0, 20, 20, pkt, 20, 0);
155 printk("palacios_packet_send return: %d\n", size);
163 static struct v3_packet_hooks palacios_packet_hooks = {
164 .send = palacios_packet_send,
165 .add_recver = palacios_packet_add_recver,
166 .del_recver = palacios_packet_del_recver,
171 recv_pkt(char * pkt, int len) {
177 if (packet_state.raw_sock == NULL) {
187 msg.msg_control = NULL;
188 msg.msg_controllen = 0;
191 msg.msg_control = NULL;
195 size = sock_recvmsg(packet_state.raw_sock, &msg, len, msg.msg_flags);
203 send_raw_packet_to_palacios(char * pkt,
205 struct v3_vm_info * vm) {
206 struct v3_packet_event event;
207 char data[ETHERNET_PACKET_LEN];
209 /* one memory copy */
210 memcpy(data, pkt, len);
214 v3_deliver_packet_event(vm, &event);
217 static int packet_server(void * arg) {
218 char pkt[ETHERNET_PACKET_LEN];
220 struct v3_vm_info *vm;
222 printk("Palacios Raw Packet Bridge: Staring receiving server\n");
224 while (!kthread_should_stop()) {
225 size = recv_pkt(pkt, ETHERNET_PACKET_LEN);
227 printk(KERN_WARNING "Palacios raw packet receive error, Server terminated\n");
233 printk("Palacios Packet: receive pkt from NIC (size: %d)\n",
235 print_hex_dump(NULL, "pkt_header: ", 0, 10, 10, pkt, 20, 0);
239 /* if VNET is enabled, send to VNET */
243 /* if it is broadcast or multicase packet */
247 vm = (struct v3_vm_info *)v3_htable_search(packet_state.mac_vm_cache, (addr_t)pkt);
249 printk("Find destinated VM 0x%p\n", vm);
250 send_raw_packet_to_palacios(pkt, size, vm);
258 int palacios_init_packet(const char * eth_dev) {
260 if(packet_state.inited == 0){
261 packet_state.inited = 1;
263 if(init_raw_socket(eth_dev) == -1){
264 printk("Error to initiate palacios packet interface\n");
268 V3_Init_Packet(&palacios_packet_hooks);
270 packet_state.mac_vm_cache = v3_create_htable(0, &hash_fn, &hash_eq);
272 packet_state.server_thread = kthread_run(packet_server, NULL, "raw-packet-server");
278 void palacios_deinit_packet(const char * eth_dev) {
280 kthread_stop(packet_state.server_thread);
281 packet_state.raw_sock->ops->release(packet_state.raw_sock);
282 v3_free_htable(packet_state.mac_vm_cache, 0, 1);
283 packet_state.inited = 0;