Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Copyright (c) 2004 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.[0-9]+"); | |
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: aoeblk_init: can't register major\n"); | |
88 | goto blkreg_fail; | |
89 | } | |
90 | ||
91 | printk(KERN_INFO | |
92 | "aoe: aoe_init: AoE v2.6-%s initialised.\n", | |
93 | VERSION); | |
94 | discover_timer(TINIT); | |
95 | return 0; | |
96 | ||
97 | blkreg_fail: | |
98 | aoenet_exit(); | |
99 | net_fail: | |
100 | aoeblk_exit(); | |
101 | blk_fail: | |
102 | aoechr_exit(); | |
103 | chr_fail: | |
104 | aoedev_exit(); | |
105 | ||
106 | printk(KERN_INFO "aoe: aoe_init: initialisation failure.\n"); | |
107 | return ret; | |
108 | } | |
109 | ||
110 | module_init(aoe_init); | |
111 | module_exit(aoe_exit); | |
112 |