1 /* Copyright (c) 2007 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 "aoe.h"
11
12 MODULE_LICENSE("GPL");
13 MODULE_AUTHOR("Sam Hopkins <sah@coraid.com>");
14 MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels");
15 MODULE_VERSION(VERSION);
16
17 enum { TINIT, TRUN, TKILL };
18
19 static void
20 discover_timer(ulong vp)
21 {
22 static struct timer_list t;
23 static volatile ulong die;
24 static spinlock_t lock;
25 ulong flags;
26 enum { DTIMERTICK = HZ * 60 }; /* one minute */
27
28 switch (vp) {
29 case TINIT:
30 init_timer(&t);
31 spin_lock_init(&lock);
32 t.data = TRUN;
33 t.function = discover_timer;
34 die = 0;
35 case TRUN:
36 spin_lock_irqsave(&lock, flags);
37 if (!die) {
38 t.expires = jiffies + DTIMERTICK;
39 add_timer(&t);
40 }
41 spin_unlock_irqrestore(&lock, flags);
42
43 aoecmd_cfg(0xffff, 0xff);
44 return;
45 case TKILL:
46 spin_lock_irqsave(&lock, flags);
47 die = 1;
48 spin_unlock_irqrestore(&lock, flags);
49
50 del_timer_sync(&t);
51 default:
52 return;
53 }
54 }
55
56 static void
57 aoe_exit(void)
58 {
59 discover_timer(TKILL);
60
61 aoenet_exit();
62 unregister_blkdev(AOE_MAJOR, DEVICE_NAME);
63 aoechr_exit();
64 aoedev_exit();
65 aoeblk_exit(); /* free cache after de-allocating bufs */
66 }
67
68 static int __init
69 aoe_init(void)
70 {
71 int ret;
72
73 ret = aoedev_init();
74 if (ret)
75 return ret;
76 ret = aoechr_init();
77 if (ret)
78 goto chr_fail;
79 ret = aoeblk_init();
80 if (ret)
81 goto blk_fail;
82 ret = aoenet_init();
83 if (ret)
84 goto net_fail;
85 ret = register_blkdev(AOE_MAJOR, DEVICE_NAME);
86 if (ret < 0) {
87 printk(KERN_ERR "aoe: can't register major\n");
88 goto blkreg_fail;
89 }
90
91 printk(KERN_INFO "aoe: AoE v%s initialised.\n", VERSION);
92 discover_timer(TINIT);
93 return 0;
94
95 blkreg_fail:
96 aoenet_exit();
97 net_fail:
98 aoeblk_exit();
99 blk_fail:
100 aoechr_exit();
101 chr_fail:
102 aoedev_exit();
103
104 printk(KERN_INFO "aoe: initialisation failure.\n");
105 return ret;
106 }
107
108 module_init(aoe_init);
109 module_exit(aoe_exit);
110
111
|
This page was automatically generated by the
LXR engine.
|