LXR linux/drivers/block/aoe/aoemain.c

   1/* Copyright (c) 2012 Coraid, Inc.  See COPYING for GPL terms. */
   2/*
   3 * aoemain.c
   4 * Module initialization routines, discover timer
   5 */
   6
   7#include <linux/hdreg.h>
   8#include <linux/blkdev.h>
   9#include <linux/module.h>
  10#include <linux/skbuff.h>
  11#include "aoe.h"
  12
  13MODULE_LICENSE("GPL");
  14MODULE_AUTHOR("Sam Hopkins <sah@coraid.com>");
  15MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels");
  16MODULE_VERSION(VERSION);
  17
  18static struct timer_list timer;
  19
  20static void discover_timer(struct timer_list *t)
  21{
  22        mod_timer(t, jiffies + HZ * 60); /* one minute */
  23
  24        aoecmd_cfg(0xffff, 0xff);
  25}
  26
  27static void __exit
  28aoe_exit(void)
  29{
  30        del_timer_sync(&timer);
  31
  32        aoenet_exit();
  33        unregister_blkdev(AOE_MAJOR, DEVICE_NAME);
  34        aoecmd_exit();
  35        aoechr_exit();
  36        aoedev_exit();
  37        aoeblk_exit();          /* free cache after de-allocating bufs */
  38}
  39
  40static int __init
  41aoe_init(void)
  42{
  43        int ret;
  44
  45        ret = aoedev_init();
  46        if (ret)
  47                return ret;
  48        ret = aoechr_init();
  49        if (ret)
  50                goto chr_fail;
  51        ret = aoeblk_init();
  52        if (ret)
  53                goto blk_fail;
  54        ret = aoenet_init();
  55        if (ret)
  56                goto net_fail;
  57        ret = aoecmd_init();
  58        if (ret)
  59                goto cmd_fail;
  60        ret = register_blkdev(AOE_MAJOR, DEVICE_NAME);
  61        if (ret < 0) {
  62                printk(KERN_ERR "aoe: can't register major\n");
  63                goto blkreg_fail;
  64        }
  65        printk(KERN_INFO "aoe: AoE v%s initialised.\n", VERSION);
  66
  67        timer_setup(&timer, discover_timer, 0);
  68        discover_timer(&timer);
  69        return 0;
  70 blkreg_fail:
  71        aoecmd_exit();
  72 cmd_fail:
  73        aoenet_exit();
  74 net_fail:
  75        aoeblk_exit();
  76 blk_fail:
  77        aoechr_exit();
  78 chr_fail:
  79        aoedev_exit();
  80
  81        printk(KERN_INFO "aoe: initialisation failure.\n");
  82        return ret;
  83}
  84
  85module_init(aoe_init);
  86module_exit(aoe_exit);
  87
  88