src/core.c

   1 /*
   2  * Lightweight Autonomic Network Architecture
   3  *
   4  * Collector and loader for all core extensions (xt_*).
   5  *
   6  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   7  * Swiss federal institute of technology (ETH Zurich)
   8  * Subject to the GPL.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/proc_fs.h>
  14 #include <net/net_namespace.h>
  15
  16 #include "xt_fblock.h"
  17 #include "xt_vlink.h"
  18 #include "xt_builder.h"
  19 #include "xt_user.h"
  20
  21 struct proc_dir_entry *lana_proc_dir;
  22 EXPORT_SYMBOL(lana_proc_dir);
  23 struct proc_dir_entry *fblock_proc_dir;
  24 EXPORT_SYMBOL(fblock_proc_dir);
  25
  26 static int __init init_lana_core_module(void)
  27 {
  28         int ret;
  29
  30         printk(KERN_INFO "[lana] bootstrapping core ...\n");
  31         lana_proc_dir = proc_mkdir("lana", init_net.proc_net);
  32         if (!lana_proc_dir)
  33                 return -ENOMEM;
  34         fblock_proc_dir = proc_mkdir("fblock", lana_proc_dir);
  35         if (!fblock_proc_dir)
  36                 goto err;
  37         ret = init_vlink_system();
  38         if (ret)
  39                 goto err1;
  40         ret = init_fblock_tables();
  41         if (ret)
  42                 goto err2;
  43         ret = init_fblock_builder();
  44         if (ret)
  45                 goto err3;
  46         ret = init_userctl_system();
  47         if (ret)
  48                 goto err4;
  49         printk(KERN_INFO "[lana] core up and running!\n");
  50         return 0;
  51 err4:
  52         cleanup_fblock_builder();
  53 err3:
  54         cleanup_fblock_tables();
  55 err2:
  56         cleanup_vlink_system();
  57 err1:
  58         remove_proc_entry("fblock", lana_proc_dir);
  59 err:
  60         remove_proc_entry("lana", init_net.proc_net);
  61         return -ENOMEM;
  62 }
  63
  64 static void __exit cleanup_lana_core_module(void)
  65 {
  66         printk(KERN_INFO "[lana] halting core ...\n");
  67         cleanup_userctl_system();
  68         cleanup_fblock_tables();
  69         cleanup_fblock_builder();
  70         cleanup_vlink_system();
  71         remove_proc_entry("fblock", lana_proc_dir);
  72         remove_proc_entry("lana", init_net.proc_net);
  73         printk(KERN_INFO "[lana] core shut down!\n");
  74 }
  75
  76 module_init(init_lana_core_module);
  77 module_exit(cleanup_lana_core_module);
  78
  79 MODULE_LICENSE("GPL");
  80 MODULE_AUTHOR("Daniel Borkmann <dborkma@tik.ee.ethz.ch>");
  81 MODULE_DESCRIPTION("LANA core driver");
  82