2 * Palacios Raw Packet Interface Implementation
6 #include <asm/uaccess.h>
7 #include <linux/inet.h>
8 #include <linux/kthread.h>
9 #include <linux/netdevice.h>
12 #include <linux/string.h>
13 #include <linux/preempt.h>
14 #include <linux/sched.h>
15 #include <linux/if_packet.h>
16 #include <linux/errno.h>
19 #include <interfaces/vmm_packet.h>
20 #include <palacios/vmm_host_events.h>
21 #include <vnet/vnet.h>
25 #include <palacios/vmm_hashtable.h>
26 #include <palacios/vmm_ethernet.h>
30 #include "linux-exts.h"
32 struct palacios_packet_state {
33 struct socket * raw_sock;
36 struct hashtable * mac_vm_cache;
37 struct task_struct * server_thread;
40 static struct palacios_packet_state packet_state;
42 static inline uint_t hash_fn(addr_t hdr_ptr) {
43 uint8_t * hdr_buf = (uint8_t *)hdr_ptr;
45 return v3_hash_buffer(hdr_buf, ETH_ALEN);
48 static inline int hash_eq(addr_t key1, addr_t key2) {
49 return (memcmp((uint8_t *)key1, (uint8_t *)key2, ETH_ALEN) == 0);
53 static int palacios_packet_add_recver(const char * mac,
54 struct v3_vm_info * vm){
57 key = (char *)kmalloc(ETH_ALEN, GFP_KERNEL);
58 memcpy(key, mac, ETH_ALEN);
60 if (v3_htable_insert(packet_state.mac_vm_cache, (addr_t)key, (addr_t)vm) == 0) {
61 printk("Palacios Packet: Failed to insert new mac entry to the hash table\n");
65 printk("Packet: Add MAC: %2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
70 static int palacios_packet_del_recver(const char * mac,
71 struct v3_vm_info * vm){
76 static int init_raw_socket(const char * eth_dev){
78 struct sockaddr_ll sock_addr;
82 err = sock_create(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL), &(packet_state.raw_sock));
85 printk(KERN_WARNING "Could not create a PF_PACKET Socket, err %d\n", err);
90 eth_dev = "eth0"; /* default "eth0" */
93 memset(&if_req, 0, sizeof(if_req));
94 strncpy(if_req.ifr_name, eth_dev, IFNAMSIZ); //sizeof(if_req.ifr_name));
96 err = packet_state.raw_sock->ops->ioctl(packet_state.raw_sock, SIOCGIFINDEX, (long)&if_req);
99 printk(KERN_WARNING "Palacios Packet: Unable to get index for device %s, error %d\n",
100 if_req.ifr_name, err);
101 dev_idx = 2; /* match ALL 2:"eth0" */
103 dev_idx = if_req.ifr_ifindex;
106 printk(KERN_INFO "Palacios Packet: bind to device index: %d\n", dev_idx);
108 memset(&sock_addr, 0, sizeof(sock_addr));
109 sock_addr.sll_family = PF_PACKET;
110 sock_addr.sll_protocol = htons(ETH_P_ALL);
111 sock_addr.sll_ifindex = dev_idx;
113 err = packet_state.raw_sock->ops->bind(packet_state.raw_sock,
114 (struct sockaddr *)&sock_addr,
118 printk(KERN_WARNING "Error binding raw packet to device %s, %d\n", eth_dev, err);
122 printk(KERN_INFO "Bind palacios raw packet interface to device %s\n", eth_dev);
129 palacios_packet_send(const char * pkt, unsigned int len, void * private_data) {
135 iov.iov_base = (void *)pkt;
136 iov.iov_len = (__kernel_size_t)len;
140 msg.msg_control = NULL;
141 msg.msg_controllen = 0;
148 size = sock_sendmsg(packet_state.raw_sock, &msg, len);
156 static struct v3_packet_hooks palacios_packet_hooks = {
157 .send = palacios_packet_send,
158 .add_recver = palacios_packet_add_recver,
159 .del_recver = palacios_packet_del_recver,
164 recv_pkt(char * pkt, int len) {
170 if (packet_state.raw_sock == NULL) {
180 msg.msg_control = NULL;
181 msg.msg_controllen = 0;
184 msg.msg_control = NULL;
188 size = sock_recvmsg(packet_state.raw_sock, &msg, len, msg.msg_flags);
196 send_raw_packet_to_palacios(char * pkt,
198 struct v3_vm_info * vm) {
199 struct v3_packet_event event;
200 char data[ETHERNET_PACKET_LEN];
202 /* one memory copy */
203 memcpy(data, pkt, len);
207 v3_deliver_packet_event(vm, &event);
210 static int packet_server(void * arg) {
211 char pkt[ETHERNET_PACKET_LEN];
213 struct v3_vm_info *vm;
215 printk("Palacios Raw Packet Bridge: Staring receiving server\n");
217 while (!kthread_should_stop()) {
218 size = recv_pkt(pkt, ETHERNET_PACKET_LEN);
221 printk(KERN_WARNING "Palacios raw packet receive error, Server terminated\n");
226 /* if VNET is enabled, send to VNET */
230 /* if it is broadcast or multicase packet */
234 vm = (struct v3_vm_info *)v3_htable_search(packet_state.mac_vm_cache, (addr_t)pkt);
237 printk("Find destinated VM 0x%p\n", vm);
238 send_raw_packet_to_palacios(pkt, size, vm);
246 static int packet_init( void ) {
248 const char * eth_dev = NULL;
250 if (packet_state.inited == 0){
251 packet_state.inited = 1;
253 if (init_raw_socket(eth_dev) == -1){
254 printk("Error to initiate palacios packet interface\n");
258 V3_Init_Packet(&palacios_packet_hooks);
260 packet_state.mac_vm_cache = v3_create_htable(0, &hash_fn, &hash_eq);
262 packet_state.server_thread = kthread_run(packet_server, NULL, "raw-packet-server");
266 // REGISTER GLOBAL CONTROL to add interfaces...
271 static int packet_deinit( void ) {
274 kthread_stop(packet_state.server_thread);
275 packet_state.raw_sock->ops->release(packet_state.raw_sock);
276 v3_free_htable(packet_state.mac_vm_cache, 0, 1);
277 packet_state.inited = 0;
284 static struct linux_ext pkt_ext = {
285 .name = "PACKET_INTERFACE",
287 .deinit = packet_deinit,
293 register_extension(&pkt_ext);