SAFE public projects git trees. - safe/jmp/linux-2.6/blob - fs/gfs2/main.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #include <linux/slab.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/completion.h>
  13 #include <linux/buffer_head.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/gfs2_ondisk.h>
  17 #include <linux/lm_interface.h>
  18 #include <asm/atomic.h>
  19
  20 #include "gfs2.h"
  21 #include "incore.h"
  22 #include "super.h"
  23 #include "sys.h"
  24 #include "util.h"
  25 #include "glock.h"
  26 #include "quota.h"
  27
  28 static struct shrinker qd_shrinker = {
  29         .shrink = gfs2_shrink_qd_memory,
  30         .seeks = DEFAULT_SEEKS,
  31 };
  32
  33 static void gfs2_init_inode_once(void *foo)
  34 {
  35         struct gfs2_inode *ip = foo;
  36
  37         inode_init_once(&ip->i_inode);
  38         init_rwsem(&ip->i_rw_mutex);
  39         INIT_LIST_HEAD(&ip->i_trunc_list);
  40         ip->i_alloc = NULL;
  41 }
  42
  43 static void gfs2_init_glock_once(void *foo)
  44 {
  45         struct gfs2_glock *gl = foo;
  46
  47         INIT_HLIST_NODE(&gl->gl_list);
  48         spin_lock_init(&gl->gl_spin);
  49         INIT_LIST_HEAD(&gl->gl_holders);
  50         gl->gl_lvb = NULL;
  51         atomic_set(&gl->gl_lvb_count, 0);
  52         INIT_LIST_HEAD(&gl->gl_lru);
  53         INIT_LIST_HEAD(&gl->gl_ail_list);
  54         atomic_set(&gl->gl_ail_count, 0);
  55 }
  56
  57 /**
  58  * init_gfs2_fs - Register GFS2 as a filesystem
  59  *
  60  * Returns: 0 on success, error code on failure
  61  */
  62
  63 static int __init init_gfs2_fs(void)
  64 {
  65         int error;
  66
  67         error = gfs2_sys_init();
  68         if (error)
  69                 return error;
  70
  71         error = gfs2_glock_init();
  72         if (error)
  73                 goto fail;
  74
  75         error = -ENOMEM;
  76         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  77                                               sizeof(struct gfs2_glock),
  78                                               0, 0,
  79                                               gfs2_init_glock_once);
  80         if (!gfs2_glock_cachep)
  81                 goto fail;
  82
  83         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
  84                                               sizeof(struct gfs2_inode),
  85                                               0,  SLAB_RECLAIM_ACCOUNT|
  86                                                   SLAB_MEM_SPREAD,
  87                                               gfs2_init_inode_once);
  88         if (!gfs2_inode_cachep)
  89                 goto fail;
  90
  91         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
  92                                                 sizeof(struct gfs2_bufdata),
  93                                                 0, 0, NULL);
  94         if (!gfs2_bufdata_cachep)
  95                 goto fail;
  96
  97         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
  98                                               sizeof(struct gfs2_rgrpd),
  99                                               0, 0, NULL);
 100         if (!gfs2_rgrpd_cachep)
 101                 goto fail;
 102
 103         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 104                                                sizeof(struct gfs2_quota_data),
 105                                                0, 0, NULL);
 106         if (!gfs2_quotad_cachep)
 107                 goto fail;
 108
 109         register_shrinker(&qd_shrinker);
 110
 111         error = register_filesystem(&gfs2_fs_type);
 112         if (error)
 113                 goto fail;
 114
 115         error = register_filesystem(&gfs2meta_fs_type);
 116         if (error)
 117                 goto fail_unregister;
 118
 119         gfs2_register_debugfs();
 120
 121         printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
 122
 123         return 0;
 124
 125 fail_unregister:
 126         unregister_filesystem(&gfs2_fs_type);
 127 fail:
 128         unregister_shrinker(&qd_shrinker);
 129         gfs2_glock_exit();
 130
 131         if (gfs2_quotad_cachep)
 132                 kmem_cache_destroy(gfs2_quotad_cachep);
 133
 134         if (gfs2_rgrpd_cachep)
 135                 kmem_cache_destroy(gfs2_rgrpd_cachep);
 136
 137         if (gfs2_bufdata_cachep)
 138                 kmem_cache_destroy(gfs2_bufdata_cachep);
 139
 140         if (gfs2_inode_cachep)
 141                 kmem_cache_destroy(gfs2_inode_cachep);
 142
 143         if (gfs2_glock_cachep)
 144                 kmem_cache_destroy(gfs2_glock_cachep);
 145
 146         gfs2_sys_uninit();
 147         return error;
 148 }
 149
 150 /**
 151  * exit_gfs2_fs - Unregister the file system
 152  *
 153  */
 154
 155 static void __exit exit_gfs2_fs(void)
 156 {
 157         unregister_shrinker(&qd_shrinker);
 158         gfs2_glock_exit();
 159         gfs2_unregister_debugfs();
 160         unregister_filesystem(&gfs2_fs_type);
 161         unregister_filesystem(&gfs2meta_fs_type);
 162
 163         kmem_cache_destroy(gfs2_quotad_cachep);
 164         kmem_cache_destroy(gfs2_rgrpd_cachep);
 165         kmem_cache_destroy(gfs2_bufdata_cachep);
 166         kmem_cache_destroy(gfs2_inode_cachep);
 167         kmem_cache_destroy(gfs2_glock_cachep);
 168
 169         gfs2_sys_uninit();
 170 }
 171
 172 MODULE_DESCRIPTION("Global File System");
 173 MODULE_AUTHOR("Red Hat, Inc.");
 174 MODULE_LICENSE("GPL");
 175
 176 module_init(init_gfs2_fs);
 177 module_exit(exit_gfs2_fs);
 178