--- /dev/null
+/*
+ Palacios VNET Control Module
+ (c) Lei Xia, 2010
+ */
+#include <linux/spinlock.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+#include <linux/inet.h>
+#include <linux/kthread.h>
+
+#include <linux/netdevice.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/net.h>
+#include <linux/string.h>
+#include <linux/preempt.h>
+#include <linux/sched.h>
+#include <asm/msr.h>
+
+#include <vnet/vnet.h>
+#include <vnet/vnet_hashtable.h>
+#include "palacios-vnet.h"
+
+#define VNET_SERVER_PORT 9000
+
+struct vnet_route_iter {
+ struct v3_vnet_route route;
+ uint32_t idx;
+
+ struct list_head node;
+};
+
+
+struct vnet_link_iter {
+ uint32_t dst_ip;
+ uint16_t dst_port;
+ vnet_brg_proto_t proto;
+ uint32_t idx;
+
+ struct list_head node;
+};
+
+
+struct vnet_ctrl_state {
+ uint8_t status;
+
+ uint32_t num_links;
+ uint32_t num_routes;
+
+ struct list_head route_list;
+ struct list_head link_iter_list;
+
+ spinlock_t lock;
+
+ struct proc_dir_entry * vnet_proc_root;
+};
+
+
+static struct vnet_ctrl_state vnet_ctrl_s;
+
+
+static int parse_mac_str(char * str, uint8_t * qual, uint8_t * mac) {
+ char * token;
+
+ printk("Parsing MAC (%s)\n", str);
+
+ *qual = MAC_NOSET;
+ if(strnicmp("any", str, strlen(str)) == 0){
+ *qual = MAC_ANY;
+ return 0;
+ }else if(strnicmp("none", str, strlen(str)) == 0){
+ *qual = MAC_NONE;
+ return 0;
+ }else{
+ if (strstr(str, "-")) {
+ token = strsep(&str, "-");
+
+ if (strnicmp("not", token, strlen("not")) == 0) {
+ *qual = MAC_NOT;
+ } else {
+ printk("Invalid MAC String token (%s)\n", token);
+ return -1;
+ }
+ }
+
+ if (strstr(str, ":")) {
+ int i = 0;
+
+ if(*qual == MAC_NOSET){
+ *qual = MAC_ADDR;
+ }
+
+ for (i = 0; i < 6; i++) {
+ token = strsep(&str, ":");
+ if (!token) {
+ printk("Invalid MAC String token (%s)\n", token);
+ return -1;
+ }
+ mac[i] = simple_strtol(token, &token, 16);
+ }
+ printk("MAC: %2x:%2x:%2x:%2x:%2x:%2x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+
+ }else {
+ printk("Invalid MAC String token (%s)\n", token);
+ return -1;
+ }
+
+ }
+
+ return 0;
+}
+
+
+static int str2mac(char * str, uint8_t * mac){
+ int i = 0;
+ char *hex = NULL;
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ hex = strsep(&str, ":");
+ if (!hex) {
+ printk("Invalid MAC String token (%s)\n", str);
+ return -1;
+ }
+ mac[i] = simple_strtol(hex, &hex, 16);
+ }
+
+ return 0;
+}
+
+
+static inline struct vnet_link_iter * link_by_ip(uint32_t ip) {
+ struct vnet_link_iter * link = NULL;
+
+ list_for_each_entry(link, &(vnet_ctrl_s.link_iter_list), node) {
+
+ if (link->dst_ip == ip) {
+ return link;
+ }
+ }
+
+ return NULL;
+}
+
+static inline struct vnet_link_iter * link_by_idx(int idx) {
+ struct vnet_link_iter * link = NULL;
+
+ list_for_each_entry(link, &(vnet_ctrl_s.link_iter_list), node) {
+ if (link->idx == idx) {
+ return link;
+ }
+ }
+
+ return NULL;
+}
+
+
+static int parse_route_str(char * str, struct v3_vnet_route * route) {
+ char * token = NULL;
+ struct vnet_link_iter * link = NULL;
+
+ // src MAC
+ token = strsep(&str, " ");
+ if (!token) {
+ return -1;
+ }
+ parse_mac_str(token, &(route->src_mac_qual), route->src_mac);
+
+ // dst MAC
+ token = strsep(&str, " ");
+ if (!token) {
+ return -1;
+ }
+ parse_mac_str(token, &(route->dst_mac_qual), route->dst_mac);
+
+ // dst LINK type
+ token = strsep(&str, " ");
+ if (!token) {
+ return -1;
+ }
+ printk("dst type =(%s)\n", token);
+
+ if (strnicmp("interface", token, strlen("interface")) == 0) {
+ route->dst_type = LINK_INTERFACE;
+ } else if (strnicmp("edge", token, strlen("edge")) == 0) {
+ route->dst_type = LINK_EDGE;
+ } else {
+ printk("Invalid Destination Link Type (%s)\n", token);
+ return -1;
+ }
+
+ // dst link
+ token = strsep(&str, " ");
+ if (!token) {
+ return -1;
+ }
+ printk("dst ID=(%s)\n", token);
+
+ // Figure out link here
+ if (route->dst_type == LINK_EDGE) {
+ uint32_t link_ip;
+
+ // Figure out Link Here
+ if (in4_pton(token, strlen(token), (uint8_t *)&(link_ip), '\0', NULL) != 1) {
+ printk("Invalid Dst IP address (%s)\n", token);
+ return -EFAULT;
+ }
+
+ link = link_by_ip(link_ip);
+ if (link != NULL){
+ route->dst_id = link->idx;
+ }else{
+ printk("can not find dst link %s\n", token);
+ return -1;
+ }
+
+ printk("link_ip = %d, link_id = %d\n", link_ip, link->idx);
+ } else if (route->dst_type == LINK_INTERFACE) {
+ uint8_t mac[ETH_ALEN];
+
+ if(str2mac(token, mac) == -1){
+ printk("wrong MAC format (%s)\n", token);
+ return -1;
+ }
+
+ route->dst_id = v3_vnet_find_dev(mac);
+ if (route->dst_id == -1){
+ printk("can not find dst device %s\n", token);
+ return -1;
+ }
+ } else {
+ printk("Unsupported dst link type\n");
+ return -1;
+ }
+
+ route->src_id = -1;
+ route->src_type = -1;
+
+ // src LINK
+ token = strsep(&str, " ");
+
+ printk("SRC type = %s\n", token);
+
+ if (!token) {
+ return -1;
+ }
+
+ if (strnicmp("interface", token, strlen("interface")) == 0) {
+ route->src_type = LINK_INTERFACE;
+ } else if (strnicmp("edge", token, strlen("edge")) == 0) {
+ route->src_type = LINK_EDGE;
+ } else if (strnicmp("any", token, strlen("any")) == 0) {
+ route->src_type = LINK_ANY;
+ } else {
+ printk("Invalid Src link type (%s)\n", token);
+ return -1;
+ }
+
+
+ if (route->src_type == LINK_ANY) {
+ route->src_id = -1;
+ } else if (route->src_type == LINK_EDGE) {
+ uint32_t src_ip;
+ token = strsep(&str, " ");
+
+ if (!token) {
+ return -1;
+ }
+
+ // Figure out Link Here
+ if (in4_pton(token, strlen(token), (uint8_t *)&(src_ip), '\0', NULL) != 1) {
+ printk("Invalid SRC IP address (%s)\n", token);
+ return -EFAULT;
+ }
+
+ link = link_by_ip(src_ip);
+ if (link != NULL){
+ route->src_id = link->idx;
+ }else{
+ printk("can not find src link %s\n", token);
+ return -1;
+ }
+ } else if(route->src_type == LINK_INTERFACE){
+ uint8_t mac[ETH_ALEN];
+
+ if(str2mac(token, mac) == -1){
+ printk("wrong MAC format (%s)\n", token);
+ return -1;
+ }
+
+ route->src_id = v3_vnet_find_dev(mac);
+ if (route->src_id == -1){
+ printk("can not find dst device %s\n", token);
+ return -1;
+ }
+ } else {
+ printk("Invalid link type\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static void * route_seq_start(struct seq_file * s, loff_t * pos) {
+ struct vnet_route_iter * route_iter = NULL;
+ loff_t i = 0;
+
+ if (*pos >= vnet_ctrl_s.num_routes) {
+ return NULL;
+ }
+
+ list_for_each_entry(route_iter, &(vnet_ctrl_s.route_list), node) {
+ if (i == *pos) {
+ break;
+ }
+
+ i++;
+ }
+
+ return route_iter;
+}
+
+
+static void * route_seq_next(struct seq_file * s, void * v, loff_t * pos) {
+ struct vnet_route_iter * route_iter = NULL;
+
+ route_iter = list_entry(((struct vnet_route_iter *)v)->node.next, struct vnet_route_iter, node);
+
+ // Check if the list has looped
+ if (&(route_iter->node) == &(vnet_ctrl_s.route_list)) {
+ return NULL;
+ }
+
+ *pos += 1;
+
+ return route_iter;
+}
+
+static void route_seq_stop(struct seq_file * s, void * v) {
+
+ return;
+}
+
+static void * link_seq_start(struct seq_file * s, loff_t * pos) {
+ struct vnet_link_iter * link_iter = NULL;
+ loff_t i = 0;
+
+ if (*pos >= vnet_ctrl_s.num_links) {
+ return NULL;
+ }
+
+ list_for_each_entry(link_iter, &(vnet_ctrl_s.link_iter_list), node) {
+ if (i == *pos) {
+ break;
+ }
+
+ i++;
+ }
+
+ return link_iter;
+}
+
+static int route_seq_show(struct seq_file * s, void * v) {
+ struct vnet_route_iter * route_iter = v;
+ struct v3_vnet_route * route = &(route_iter->route);
+
+ seq_printf(s, "%d:\t", route_iter->idx);
+
+ seq_printf(s, "\nSrc:\t");
+ switch (route->src_mac_qual) {
+ case MAC_ANY:
+ seq_printf(s, "any ");
+ break;
+ case MAC_NONE:
+ seq_printf(s, "none ");
+ break;
+ case MAC_NOT:
+ seq_printf(s, "not-%2x:%2x:%2x:%2x:%2x:%2x ",
+ route->src_mac[0], route->src_mac[1], route->src_mac[2],
+ route->src_mac[3], route->src_mac[4], route->src_mac[5]);
+ break;
+ default:
+ seq_printf(s, "%x:%x:%x:%x:%x:%x ",
+ route->src_mac[0], route->src_mac[1], route->src_mac[2],
+ route->src_mac[3], route->src_mac[4], route->src_mac[5]);
+ break;
+ }
+
+ seq_printf(s, "\nDst:\t");
+ switch (route->dst_mac_qual) {
+ case MAC_ANY:
+ seq_printf(s, "any ");
+ break;
+ case MAC_NONE:
+ seq_printf(s, "none ");
+ break;
+ case MAC_NOT:
+ seq_printf(s, "not-%x:%x:%x:%x:%x:%x ",
+ route->src_mac[0], route->src_mac[1], route->src_mac[2],
+ route->src_mac[3], route->src_mac[4], route->src_mac[5]);
+ break;
+ default:
+ seq_printf(s, "%x:%x:%x:%x:%x:%x ",
+ route->src_mac[0], route->src_mac[1], route->src_mac[2],
+ route->src_mac[3], route->src_mac[4], route->src_mac[5]);
+ break;
+ }
+
+ seq_printf(s, "\nDst-Type:\t");
+ switch (route->dst_type) {
+ case LINK_EDGE: {
+ struct vnet_link_iter * link = (struct vnet_link_iter *)link_by_idx(route->dst_id);
+ seq_printf(s, "EDGE %pI4", &link->dst_ip);
+ break;
+ }
+ case LINK_INTERFACE: {
+ seq_printf(s, "INTERFACE ");
+ seq_printf(s, "%d ", route->dst_id);
+ break;
+ }
+ default:
+ seq_printf(s, "Invalid Dst Link Type (%d) ", route->dst_type);
+ break;
+ }
+
+ seq_printf(s, "\nSrc-Type:\t");
+ switch (route->src_type) {
+ case LINK_EDGE: {
+ struct vnet_link_iter * link = (struct vnet_link_iter *)link_by_idx(route->src_id);
+ seq_printf(s, "EDGE %pI4", &link->dst_ip);
+ break;
+ }
+ case LINK_INTERFACE: {
+ seq_printf(s, "INTERFACE %d", route->src_id);
+ break;
+ }
+ case LINK_ANY:
+ seq_printf(s, "ANY");
+ break;
+ default:
+ seq_printf(s, "Invalid Src Link Type (%d) ", route->src_type);
+ break;
+ }
+
+ seq_printf(s, "\n");
+
+ return 0;
+}
+
+static void * link_seq_next(struct seq_file * s, void * v, loff_t * pos) {
+ struct vnet_link_iter * link_iter = NULL;
+
+ link_iter = list_entry(((struct vnet_link_iter *)v)->node.next, struct vnet_link_iter, node);
+
+ // Check if the list has looped
+ if (&(link_iter->node) == &(vnet_ctrl_s.link_iter_list)) {
+ return NULL;
+ }
+
+ *pos += 1;
+
+ return link_iter;
+}
+
+static void link_seq_stop(struct seq_file * s, void * v) {
+
+ return;
+}
+
+static int link_seq_show(struct seq_file * s, void * v) {
+ struct vnet_link_iter * link_iter = v;
+ struct nic_statistics stats;
+
+ vnet_brg_link_stats(link_iter->idx, &stats);
+
+ seq_printf(s, "%d:\t%pI4\t%d\n\t\tReceived Pkts: %lld, Received Bytes %lld\n\t\tSent Pkts: %lld, Sent Bytes: %lld\n\n",
+ link_iter->idx,
+ &link_iter->dst_ip,
+ link_iter->dst_port,
+ stats.rx_pkts,
+ stats.rx_bytes,
+ stats.tx_pkts,
+ stats.tx_bytes);
+
+ return 0;
+}
+
+
+static struct seq_operations route_seq_ops = {
+ .start = route_seq_start,
+ .next = route_seq_next,
+ .stop = route_seq_stop,
+ .show = route_seq_show
+};
+
+
+static struct seq_operations link_seq_ops = {
+ .start = link_seq_start,
+ .next = link_seq_next,
+ .stop = link_seq_stop,
+ .show = link_seq_show
+};
+
+
+static int route_open(struct inode * inode, struct file * file) {
+ return seq_open(file, &route_seq_ops);
+}
+
+
+static int link_open(struct inode * inode, struct file * file) {
+ return seq_open(file, &link_seq_ops);
+}
+
+
+
+static int inject_route(struct vnet_route_iter * route) {
+ unsigned long flags;
+
+ route->idx = v3_vnet_add_route(route->route);
+
+ spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
+ list_add(&(route->node), &(vnet_ctrl_s.route_list));
+ vnet_ctrl_s.num_routes ++;
+ spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
+
+ printk("VNET Control: One route added to VNET core\n");
+
+ return 0;
+}
+
+
+static void delete_route(struct vnet_route_iter * route) {
+ unsigned long flags;
+
+ v3_vnet_del_route(route->idx);
+
+ spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
+ list_del(&(route->node));
+ vnet_ctrl_s.num_routes --;
+ spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
+
+ printk("VNET Control: Route %d deleted from VNET\n", route->idx);
+
+ kfree(route);
+ route = NULL;
+}
+
+
+/* Format:
+ * add src-MAC dst-MAC dst-TYPE [dst-ID] src-TYPE [src-ID]
+ *
+ * src-MAC = dst-MAC = not-MAC|any|none|MAC
+ * dst-TYPE = edge|interface
+ * src-TYPE = edge|interface|any
+ * dst-ID = src-ID = IP|MAC
+ * MAC=xx:xx:xx:xx:xx:xx
+ * IP = xxx.xxx.xxx.xxx
+ *
+ *
+ * del route-idx
+ *
+ */
+static ssize_t
+route_write(struct file * file,
+ const char * buf,
+ size_t size,
+ loff_t * ppos) {
+ char route_buf[256];
+ char * buf_iter = NULL;
+ char * line_str = route_buf;
+ char * token = NULL;
+
+ if (size >= 256) {
+ return -EFAULT;
+ }
+
+ if (copy_from_user(route_buf, buf, size)) {
+ return -EFAULT;
+ }
+
+ route_buf[size] = '\0';
+ printk("Route written: %s\n", route_buf);
+
+ while ((buf_iter = strsep(&line_str, "\r\n"))) {
+
+ token = strsep(&buf_iter, " ");
+ if (!token) {
+ return -EFAULT;
+ }
+
+ if (strnicmp("ADD", token, strlen("ADD")) == 0) {
+ struct vnet_route_iter * new_route = NULL;
+ new_route = kmalloc(sizeof(struct vnet_route_iter), GFP_KERNEL);
+
+ if (!new_route) {
+ return -ENOMEM;
+ }
+
+ memset(new_route, 0, sizeof(struct vnet_route_iter));
+
+ if (parse_route_str(buf_iter, &(new_route->route)) == -1) {
+ kfree(new_route);
+ return -EFAULT;
+ }
+
+ if (inject_route(new_route) != 0) {
+ kfree(new_route);
+ return -EFAULT;
+ }
+ } else if (strnicmp("DEL", token, strlen("DEL")) == 0) {
+ char * idx_str = NULL;
+ uint32_t d_idx;
+
+ idx_str = strsep(&buf_iter, " ");
+
+ if (!idx_str) {
+ printk("Missing route idx in DEL Route command\n");
+ return -EFAULT;
+ }
+
+ d_idx = simple_strtoul(idx_str, &idx_str, 10);
+
+ v3_vnet_del_route(d_idx);
+
+ printk("VNET Control: One route deleted\n");
+
+ } else {
+ printk("Invalid Route command string\n");
+ }
+ }
+
+ return size;
+}
+
+
+static void delete_link(struct vnet_link_iter * link){
+ unsigned long flags;
+
+ vnet_brg_delete_link(link->idx);
+
+ spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
+ list_del(&(link->node));
+ vnet_ctrl_s.num_links --;
+ spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
+
+ kfree(link);
+ link = NULL;
+}
+
+
+static void deinit_links_list(void){
+ struct vnet_link_iter * link;
+
+ list_for_each_entry(link, &(vnet_ctrl_s.link_iter_list), node) {
+ delete_link(link);
+ }
+}
+
+static void deinit_routes_list(void){
+ struct vnet_route_iter * route;
+
+ list_for_each_entry(route, &(vnet_ctrl_s.route_list), node) {
+ delete_route(route);
+ }
+}
+
+/* ADD dst-ip 9000 [udp|tcp] */
+/* DEL link-idx */
+static ssize_t
+link_write(struct file * file, const char * buf, size_t size, loff_t * ppos) {
+ char link_buf[256];
+ char * link_iter = NULL;
+ char * line_str = link_buf;
+ char * token = NULL;
+
+ if (size >= 256) {
+ return -EFAULT;
+ }
+
+ if (copy_from_user(link_buf, buf, size)) {
+ return -EFAULT;
+ }
+
+ while ((link_iter = strsep(&line_str, "\r\n"))) {
+ printk("Link written: %s\n", link_buf);
+
+ token = strsep(&link_iter, " ");
+
+ if (!token) {
+ return -EFAULT;
+ }
+
+ if (strnicmp("ADD", token, strlen("ADD")) == 0) {
+ struct vnet_link_iter * link = NULL;
+ char * ip_str = NULL;
+ uint32_t d_ip;
+ uint16_t d_port;
+ vnet_brg_proto_t d_proto;
+ int link_idx;
+ unsigned long flags;
+
+ ip_str = strsep(&link_iter, " ");
+
+ if ((!ip_str) || (!link_iter)) {
+ printk("Missing fields in ADD Link command\n");
+ return -EFAULT;
+ }
+
+ if (in4_pton(ip_str, strlen(ip_str), (uint8_t *)&(d_ip), '\0', NULL) != 1) {
+ printk("Invalid Dst IP address (%s)\n", ip_str);
+ return -EFAULT;
+ }
+
+ d_port = simple_strtol(link_iter, &link_iter, 10);
+ d_proto = UDP;
+
+ link_idx = vnet_brg_add_link(d_ip, d_port, d_proto);
+ if(link_idx < 0){
+ printk("VNET Control: Failed to create link\n");
+ return -EFAULT;
+ }
+
+ link = kmalloc(sizeof(struct vnet_link_iter), GFP_KERNEL);
+ memset(link, 0, sizeof(struct vnet_link_iter));
+
+ link->dst_ip = d_ip;
+ link->dst_port = d_port;
+ link->proto = d_proto;
+ link->idx = link_idx;
+
+ spin_lock_irqsave(&(vnet_ctrl_s.lock), flags);
+ list_add(&(link->node), &(vnet_ctrl_s.link_iter_list));
+ vnet_ctrl_s.num_links ++;
+ spin_unlock_irqrestore(&(vnet_ctrl_s.lock), flags);
+ } else if (strnicmp("DEL", token, strlen("DEL")) == 0) {
+ char * idx_str = NULL;
+ uint32_t d_idx;
+
+ idx_str = strsep(&link_iter, " ");
+
+ if (!idx_str) {
+ printk("Missing link idx in DEL Link command\n");
+ return -EFAULT;
+ }
+
+ d_idx = simple_strtoul(idx_str, &idx_str, 10);
+
+ vnet_brg_delete_link(d_idx);
+
+ printk("VNET Control: One link deleted\n");
+ } else {
+ printk("Invalid Link command string\n");
+ }
+ }
+
+ return size;
+}
+
+
+static struct file_operations route_fops = {
+ .owner = THIS_MODULE,
+ .open = route_open,
+ .read = seq_read,
+ .write = route_write,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+
+static struct file_operations link_fops = {
+ .owner = THIS_MODULE,
+ .open = link_open,
+ .read = seq_read,
+ .write = link_write,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+
+static ssize_t
+debug_write(struct file * file, const char * buf, size_t size, loff_t * ppos) {
+ char in_buf[32];
+ char * in_iter = NULL;
+ char * line_str = in_buf;
+ int level = -1;
+
+ if (size >= 32) {
+ return -EFAULT;
+ }
+
+ if (copy_from_user(in_buf, buf, size)) {
+ return -EFAULT;
+ }
+
+ in_iter = strsep(&line_str, "\r\n");
+ level = simple_strtol(in_iter, &in_iter, 10);
+
+ printk("VNET Control: Set VNET Debug level to %d\n", level);
+
+ if(level >= 0){
+ net_debug = level;
+ }
+
+ return size;
+}
+
+
+static int debug_show(struct seq_file * file, void * v){
+ seq_printf(file, "Current NET Debug Level: %d\n", net_debug);
+
+ return 0;
+}
+
+static int debug_open(struct inode * inode, struct file * file) {
+ return single_open(file, debug_show, NULL);
+}
+
+static struct file_operations debug_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_open,
+ .read = seq_read,
+ .write = debug_write,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+static int stat_show(struct seq_file * file, void * v){
+ struct vnet_stat stats;
+ struct vnet_brg_stats brg_stats;
+
+ v3_vnet_stat(&stats);
+
+ seq_printf(file, "VNET Core\n");
+ seq_printf(file, "\tReceived Packets: %d\n", stats.rx_pkts);
+ seq_printf(file, "\tReceived Bytes: %lld\n", stats.rx_bytes);
+ seq_printf(file, "\tTransmitted Packets: %d\n", stats.tx_pkts);
+ seq_printf(file, "\tTransmitted Bytes: %lld\n", stats.tx_bytes);
+
+ vnet_brg_stats(&brg_stats);
+
+ seq_printf(file, "\nVNET Bridge Server\n");
+ seq_printf(file, "\tReceived From VMM: %lld\n", brg_stats.pkt_from_vmm);
+ seq_printf(file, "\tSent To VMM: %lld\n", brg_stats.pkt_to_vmm);
+ seq_printf(file, "\tDropped From VMM: %lld\n", brg_stats.pkt_drop_vmm);
+ seq_printf(file, "\tReceived From Extern Network: %lld\n", brg_stats.pkt_from_phy);
+ seq_printf(file, "\tSent To Extern Network: %lld\n", brg_stats.pkt_to_phy);
+ seq_printf(file, "\tDropped From Extern Network: %lld\n", brg_stats.pkt_drop_phy);
+
+ return 0;
+}
+
+static int stat_open(struct inode * inode, struct file * file) {
+ return single_open(file, stat_show, NULL);
+}
+
+static struct file_operations stat_fops = {
+ .owner = THIS_MODULE,
+ .open = stat_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+
+static int init_proc_files(void) {
+ struct proc_dir_entry * route_entry = NULL;
+ struct proc_dir_entry * link_entry = NULL;
+ struct proc_dir_entry * stat_entry = NULL;
+ struct proc_dir_entry * debug_entry = NULL;
+ struct proc_dir_entry * vnet_root = NULL;
+
+ vnet_root = proc_mkdir("vnet", NULL);
+ if (vnet_root == NULL) {
+ return -1;
+ }
+
+ route_entry = create_proc_entry("routes", 0, vnet_root);
+ if (route_entry == NULL) {
+ remove_proc_entry("vnet", NULL);
+ return -1;
+ }
+ route_entry->proc_fops = &route_fops;
+
+
+ link_entry = create_proc_entry("links", 0, vnet_root);
+ if (link_entry == NULL) {
+ remove_proc_entry("routes", vnet_root);
+ remove_proc_entry("vnet", NULL);
+ return -1;
+ }
+ link_entry->proc_fops = &link_fops;
+
+
+ stat_entry = create_proc_entry("stats", 0, vnet_root);
+ if(stat_entry == NULL) {
+ remove_proc_entry("links", vnet_root);
+ remove_proc_entry("routes", vnet_root);
+ remove_proc_entry("vnet", NULL);
+ return -1;
+ }
+ stat_entry->proc_fops = &stat_fops;
+
+
+ debug_entry = create_proc_entry("debug", 0, vnet_root);
+ if(debug_entry == NULL) {
+ remove_proc_entry("links", vnet_root);
+ remove_proc_entry("routes", vnet_root);
+ remove_proc_entry("stats", vnet_root);
+ remove_proc_entry("vnet", NULL);
+ return -1;
+ }
+ debug_entry->proc_fops = &debug_fops;
+
+ vnet_ctrl_s.vnet_proc_root = vnet_root;
+
+ return 0;
+}
+
+
+static void destroy_proc_files(void) {
+ struct proc_dir_entry * vnet_root = vnet_ctrl_s.vnet_proc_root;
+
+ remove_proc_entry("debug", vnet_root);
+ remove_proc_entry("links", vnet_root);
+ remove_proc_entry("routes", vnet_root);
+ remove_proc_entry("stats", vnet_root);
+ remove_proc_entry("vnet", NULL);
+}
+
+
+int vnet_ctrl_init(void) {
+ if(vnet_ctrl_s.status != 0) {
+ return -1;
+ }
+ vnet_ctrl_s.status = 1;
+
+ memset(&vnet_ctrl_s, 0, sizeof(struct vnet_ctrl_state));
+
+ INIT_LIST_HEAD(&(vnet_ctrl_s.link_iter_list));
+ INIT_LIST_HEAD(&(vnet_ctrl_s.route_list));
+ spin_lock_init(&(vnet_ctrl_s.lock));
+
+ init_proc_files();
+
+ printk("VNET Linux control module initiated\n");
+
+ return 0;
+}
+
+
+void vnet_ctrl_deinit(void){
+ destroy_proc_files();
+
+ deinit_links_list();
+ deinit_routes_list();
+
+ vnet_ctrl_s.status = 0;
+}
+
+
