block/aoe/aoemain.c

0001 /* Copyright (c) 2012 Coraid, Inc.  See COPYING for GPL terms. */
0002 /*
0003  * aoemain.c
0004  * Module initialization routines, discover timer
0005  */
0006
0007 #include <linux/hdreg.h>
0008 #include <linux/blkdev.h>
0009 #include <linux/module.h>
0010 #include <linux/skbuff.h>
0011 #include "aoe.h"
0012
0013 MODULE_LICENSE("GPL");
0014 MODULE_AUTHOR("Sam Hopkins <sah@coraid.com>");
0015 MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels");
0016 MODULE_VERSION(VERSION);
0017
0018 static struct timer_list timer;
0019 struct workqueue_struct *aoe_wq;
0020
0021 static void discover_timer(struct timer_list *t)
0022 {
0023     mod_timer(t, jiffies + HZ * 60); /* one minute */
0024
0025     aoecmd_cfg(0xffff, 0xff);
0026 }
0027
0028 static void __exit
0029 aoe_exit(void)
0030 {
0031     del_timer_sync(&timer);
0032
0033     aoenet_exit();
0034     unregister_blkdev(AOE_MAJOR, DEVICE_NAME);
0035     aoecmd_exit();
0036     aoechr_exit();
0037     aoedev_exit();
0038     aoeblk_exit();      /* free cache after de-allocating bufs */
0039     destroy_workqueue(aoe_wq);
0040 }
0041
0042 static int __init
0043 aoe_init(void)
0044 {
0045     int ret;
0046
0047     aoe_wq = alloc_workqueue("aoe_wq", 0, 0);
0048     if (!aoe_wq)
0049         return -ENOMEM;
0050
0051     ret = aoedev_init();
0052     if (ret)
0053         goto dev_fail;
0054     ret = aoechr_init();
0055     if (ret)
0056         goto chr_fail;
0057     ret = aoeblk_init();
0058     if (ret)
0059         goto blk_fail;
0060     ret = aoenet_init();
0061     if (ret)
0062         goto net_fail;
0063     ret = aoecmd_init();
0064     if (ret)
0065         goto cmd_fail;
0066     ret = register_blkdev(AOE_MAJOR, DEVICE_NAME);
0067     if (ret < 0) {
0068         printk(KERN_ERR "aoe: can't register major\n");
0069         goto blkreg_fail;
0070     }
0071     printk(KERN_INFO "aoe: AoE v%s initialised.\n", VERSION);
0072
0073     timer_setup(&timer, discover_timer, 0);
0074     discover_timer(&timer);
0075     return 0;
0076  blkreg_fail:
0077     aoecmd_exit();
0078  cmd_fail:
0079     aoenet_exit();
0080  net_fail:
0081     aoeblk_exit();
0082  blk_fail:
0083     aoechr_exit();
0084  chr_fail:
0085     aoedev_exit();
0086  dev_fail:
0087     destroy_workqueue(aoe_wq);
0088
0089     printk(KERN_INFO "aoe: initialisation failure.\n");
0090     return ret;
0091 }
0092
0093 module_init(aoe_init);
0094 module_exit(aoe_exit);
0095