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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/block/aoe/aoemain.c
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/* Copyright (c) 2012 Coraid, Inc.  See COPYING for GPL terms. */

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/*

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 * aoemain.c

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 * Module initialization routines, discover timer

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 */

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#include <linux/hdreg.h>

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#include <linux/blkdev.h>

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#include <linux/module.h>

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#include <linux/skbuff.h>

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#include "aoe.h"

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MODULE_LICENSE("GPL");

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MODULE_AUTHOR("Sam Hopkins <[email protected]>");

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MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels");

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MODULE_VERSION(VERSION);

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static struct timer_list timer;

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struct workqueue_struct *aoe_wq;

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static void discover_timer(struct timer_list *t)

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{

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	mod_timer(t, jiffies + HZ * 60); /* one minute */

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	aoecmd_cfg(0xffff, 0xff);

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}

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static void __exit

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aoe_exit(void)

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{

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	timer_delete_sync(&timer);

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	aoenet_exit();

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	unregister_blkdev(AOE_MAJOR, DEVICE_NAME);

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	aoecmd_exit();

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	aoechr_exit();

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	aoedev_exit();

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	aoeblk_exit();		/* free cache after de-allocating bufs */

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	destroy_workqueue(aoe_wq);

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}

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static int __init

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aoe_init(void)

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{

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	int ret;

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	aoe_wq = alloc_workqueue("aoe_wq", 0, 0);

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	if (!aoe_wq)

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		return -ENOMEM;

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	ret = aoedev_init();

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	if (ret)

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		goto dev_fail;

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	ret = aoechr_init();

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	if (ret)

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		goto chr_fail;

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	ret = aoeblk_init();

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	if (ret)

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		goto blk_fail;

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	ret = aoenet_init();

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	if (ret)

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		goto net_fail;

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	ret = aoecmd_init();

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	if (ret)

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		goto cmd_fail;

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	ret = register_blkdev(AOE_MAJOR, DEVICE_NAME);

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	if (ret < 0) {

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		printk(KERN_ERR "aoe: can't register major\n");

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		goto blkreg_fail;

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	}

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	printk(KERN_INFO "aoe: AoE v%s initialised.\n", VERSION);

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	timer_setup(&timer, discover_timer, 0);

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	discover_timer(&timer);

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	return 0;

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 blkreg_fail:

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	aoecmd_exit();

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 cmd_fail:

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	aoenet_exit();

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 net_fail:

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	aoeblk_exit();

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 blk_fail:

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	aoechr_exit();

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 chr_fail:

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	aoedev_exit();

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 dev_fail:

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	destroy_workqueue(aoe_wq);

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	printk(KERN_INFO "aoe: initialisation failure.\n");

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	return ret;

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}

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module_init(aoe_init);

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module_exit(aoe_exit);

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