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;
19struct workqueue_struct *aoe_wq;
20
21static void discover_timer(struct timer_list *t)
22{
23	mod_timer(t, jiffies + HZ * 60); /* one minute */
24
25	aoecmd_cfg(0xffff, 0xff);
26}
27
28static void __exit
29aoe_exit(void)
30{
31	del_timer_sync(&timer);
32
33	aoenet_exit();
34	unregister_blkdev(AOE_MAJOR, DEVICE_NAME);
35	aoecmd_exit();
36	aoechr_exit();
37	aoedev_exit();
38	aoeblk_exit();		/* free cache after de-allocating bufs */
39	destroy_workqueue(aoe_wq);
40}
41
42static int __init
43aoe_init(void)
44{
45	int ret;
46
47	aoe_wq = alloc_workqueue("aoe_wq", 0, 0);
48	if (!aoe_wq)
49		return -ENOMEM;
50
51	ret = aoedev_init();
52	if (ret)
53		goto dev_fail;
54	ret = aoechr_init();
55	if (ret)
56		goto chr_fail;
57	ret = aoeblk_init();
58	if (ret)
59		goto blk_fail;
60	ret = aoenet_init();
61	if (ret)
62		goto net_fail;
63	ret = aoecmd_init();
64	if (ret)
65		goto cmd_fail;
66	ret = register_blkdev(AOE_MAJOR, DEVICE_NAME);
67	if (ret < 0) {
68		printk(KERN_ERR "aoe: can't register major\n");
69		goto blkreg_fail;
70	}
71	printk(KERN_INFO "aoe: AoE v%s initialised.\n", VERSION);
72
73	timer_setup(&timer, discover_timer, 0);
74	discover_timer(&timer);
75	return 0;
76 blkreg_fail:
77	aoecmd_exit();
78 cmd_fail:
79	aoenet_exit();
80 net_fail:
81	aoeblk_exit();
82 blk_fail:
83	aoechr_exit();
84 chr_fail:
85	aoedev_exit();
86 dev_fail:
87	destroy_workqueue(aoe_wq);
88
89	printk(KERN_INFO "aoe: initialisation failure.\n");
90	return ret;
91}
92
93module_init(aoe_init);
94module_exit(aoe_exit);
95
96