fs/gfs2/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   8
   9 #include <linux/slab.h>
  10 #include <linux/spinlock.h>
  11 #include <linux/completion.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/gfs2_ondisk.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/rculist_bl.h>
  18 #include <linux/atomic.h>
  19 #include <linux/mempool.h>
  20
  21 #include "gfs2.h"
  22 #include "incore.h"
  23 #include "super.h"
  24 #include "sys.h"
  25 #include "util.h"
  26 #include "glock.h"
  27 #include "quota.h"
  28 #include "recovery.h"
  29 #include "dir.h"
  30 #include "glops.h"
  31
  32 struct workqueue_struct *gfs2_control_wq;
  33
  34 static void gfs2_init_inode_once(void *foo)
  35 {
  36         struct gfs2_inode *ip = foo;
  37
  38         inode_init_once(&ip->i_inode);
  39         atomic_set(&ip->i_sizehint, 0);
  40         init_rwsem(&ip->i_rw_mutex);
  41         INIT_LIST_HEAD(&ip->i_trunc_list);
  42         ip->i_qadata = NULL;
  43         gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
  44         memset(&ip->i_res, 0, sizeof(ip->i_res));
  45         RB_CLEAR_NODE(&ip->i_res.rs_node);
  46         ip->i_hash_cache = NULL;
  47         gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
  48 }
  49
  50 static void gfs2_init_glock_once(void *foo)
  51 {
  52         struct gfs2_glock *gl = foo;
  53
  54         spin_lock_init(&gl->gl_lockref.lock);
  55         INIT_LIST_HEAD(&gl->gl_holders);
  56         INIT_LIST_HEAD(&gl->gl_lru);
  57         INIT_LIST_HEAD(&gl->gl_ail_list);
  58         atomic_set(&gl->gl_ail_count, 0);
  59         atomic_set(&gl->gl_revokes, 0);
  60 }
  61
  62 static void gfs2_init_gl_aspace_once(void *foo)
  63 {
  64         struct gfs2_glock *gl = foo;
  65         struct address_space *mapping = (struct address_space *)(gl + 1);
  66
  67         gfs2_init_glock_once(gl);
  68         address_space_init_once(mapping);
  69 }
  70
  71 /**
  72  * init_gfs2_fs - Register GFS2 as a filesystem
  73  *
  74  * Returns: 0 on success, error code on failure
  75  */
  76
  77 static int __init init_gfs2_fs(void)
  78 {
  79         int error;
  80
  81         gfs2_str2qstr(&gfs2_qdot, ".");
  82         gfs2_str2qstr(&gfs2_qdotdot, "..");
  83         gfs2_quota_hash_init();
  84
  85         error = gfs2_sys_init();
  86         if (error)
  87                 return error;
  88
  89         error = list_lru_init(&gfs2_qd_lru);
  90         if (error)
  91                 goto fail_lru;
  92
  93         error = gfs2_glock_init();
  94         if (error)
  95                 goto fail_glock;
  96
  97         error = -ENOMEM;
  98         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  99                                               sizeof(struct gfs2_glock),
 100                                               0, 0,
 101                                               gfs2_init_glock_once);
 102         if (!gfs2_glock_cachep)
 103                 goto fail_cachep1;
 104
 105         gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
 106                                         sizeof(struct gfs2_glock) +
 107                                         sizeof(struct address_space),
 108                                         0, 0, gfs2_init_gl_aspace_once);
 109
 110         if (!gfs2_glock_aspace_cachep)
 111                 goto fail_cachep2;
 112
 113         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
 114                                               sizeof(struct gfs2_inode),
 115                                               0,  SLAB_RECLAIM_ACCOUNT|
 116                                                   SLAB_MEM_SPREAD|
 117                                                   SLAB_ACCOUNT,
 118                                               gfs2_init_inode_once);
 119         if (!gfs2_inode_cachep)
 120                 goto fail_cachep3;
 121
 122         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
 123                                                 sizeof(struct gfs2_bufdata),
 124                                                 0, 0, NULL);
 125         if (!gfs2_bufdata_cachep)
 126                 goto fail_cachep4;
 127
 128         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
 129                                               sizeof(struct gfs2_rgrpd),
 130                                               0, 0, NULL);
 131         if (!gfs2_rgrpd_cachep)
 132                 goto fail_cachep5;
 133
 134         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 135                                                sizeof(struct gfs2_quota_data),
 136                                                0, 0, NULL);
 137         if (!gfs2_quotad_cachep)
 138                 goto fail_cachep6;
 139
 140         gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
 141                                                sizeof(struct gfs2_qadata),
 142                                                0, 0, NULL);
 143         if (!gfs2_qadata_cachep)
 144                 goto fail_cachep7;
 145
 146         error = register_shrinker(&gfs2_qd_shrinker);
 147         if (error)
 148                 goto fail_shrinker;
 149
 150         error = register_filesystem(&gfs2_fs_type);
 151         if (error)
 152                 goto fail_fs1;
 153
 154         error = register_filesystem(&gfs2meta_fs_type);
 155         if (error)
 156                 goto fail_fs2;
 157
 158         error = -ENOMEM;
 159         gfs_recovery_wq = alloc_workqueue("gfs_recovery",
 160                                           WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
 161         if (!gfs_recovery_wq)
 162                 goto fail_wq1;
 163
 164         gfs2_control_wq = alloc_workqueue("gfs2_control",
 165                                           WQ_UNBOUND | WQ_FREEZABLE, 0);
 166         if (!gfs2_control_wq)
 167                 goto fail_wq2;
 168
 169         gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
 170
 171         if (!gfs2_freeze_wq)
 172                 goto fail_wq3;
 173
 174         gfs2_page_pool = mempool_create_page_pool(64, 0);
 175         if (!gfs2_page_pool)
 176                 goto fail_mempool;
 177
 178         gfs2_register_debugfs();
 179
 180         pr_info("GFS2 installed\n");
 181
 182         return 0;
 183
 184 fail_mempool:
 185         destroy_workqueue(gfs2_freeze_wq);
 186 fail_wq3:
 187         destroy_workqueue(gfs2_control_wq);
 188 fail_wq2:
 189         destroy_workqueue(gfs_recovery_wq);
 190 fail_wq1:
 191         unregister_filesystem(&gfs2meta_fs_type);
 192 fail_fs2:
 193         unregister_filesystem(&gfs2_fs_type);
 194 fail_fs1:
 195         unregister_shrinker(&gfs2_qd_shrinker);
 196 fail_shrinker:
 197         kmem_cache_destroy(gfs2_qadata_cachep);
 198 fail_cachep7:
 199         kmem_cache_destroy(gfs2_quotad_cachep);
 200 fail_cachep6:
 201         kmem_cache_destroy(gfs2_rgrpd_cachep);
 202 fail_cachep5:
 203         kmem_cache_destroy(gfs2_bufdata_cachep);
 204 fail_cachep4:
 205         kmem_cache_destroy(gfs2_inode_cachep);
 206 fail_cachep3:
 207         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 208 fail_cachep2:
 209         kmem_cache_destroy(gfs2_glock_cachep);
 210 fail_cachep1:
 211         gfs2_glock_exit();
 212 fail_glock:
 213         list_lru_destroy(&gfs2_qd_lru);
 214 fail_lru:
 215         gfs2_sys_uninit();
 216         return error;
 217 }
 218
 219 /**
 220  * exit_gfs2_fs - Unregister the file system
 221  *
 222  */
 223
 224 static void __exit exit_gfs2_fs(void)
 225 {
 226         unregister_shrinker(&gfs2_qd_shrinker);
 227         gfs2_glock_exit();
 228         gfs2_unregister_debugfs();
 229         unregister_filesystem(&gfs2_fs_type);
 230         unregister_filesystem(&gfs2meta_fs_type);
 231         destroy_workqueue(gfs_recovery_wq);
 232         destroy_workqueue(gfs2_control_wq);
 233         destroy_workqueue(gfs2_freeze_wq);
 234         list_lru_destroy(&gfs2_qd_lru);
 235
 236         rcu_barrier();
 237
 238         mempool_destroy(gfs2_page_pool);
 239         kmem_cache_destroy(gfs2_qadata_cachep);
 240         kmem_cache_destroy(gfs2_quotad_cachep);
 241         kmem_cache_destroy(gfs2_rgrpd_cachep);
 242         kmem_cache_destroy(gfs2_bufdata_cachep);
 243         kmem_cache_destroy(gfs2_inode_cachep);
 244         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 245         kmem_cache_destroy(gfs2_glock_cachep);
 246
 247         gfs2_sys_uninit();
 248 }
 249
 250 MODULE_DESCRIPTION("Global File System");
 251 MODULE_AUTHOR("Red Hat, Inc.");
 252 MODULE_LICENSE("GPL");
 253
 254 module_init(init_gfs2_fs);
 255 module_exit(exit_gfs2_fs);
 256