xref: /openbmc/linux/drivers/block/aoe/aoemain.c (revision 0b8d7622)
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 
13 MODULE_LICENSE("GPL");
14 MODULE_AUTHOR("Sam Hopkins <sah@coraid.com>");
15 MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels");
16 MODULE_VERSION(VERSION);
17 
18 static struct timer_list timer;
19 struct workqueue_struct *aoe_wq;
20 
discover_timer(struct timer_list * t)21 static 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 
28 static void __exit
aoe_exit(void)29 aoe_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 
42 static int __init
aoe_init(void)43 aoe_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 
93 module_init(aoe_init);
94 module_exit(aoe_exit);
95 
96