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         INIT_LIST_HEAD(&ip->i_ordered);
  43         ip->i_qadata = NULL;
  44         gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
  45         memset(&ip->i_res, 0, sizeof(ip->i_res));
  46         RB_CLEAR_NODE(&ip->i_res.rs_node);
  47         ip->i_hash_cache = NULL;
  48         gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
  49 }
  50
  51 static void gfs2_init_glock_once(void *foo)
  52 {
  53         struct gfs2_glock *gl = foo;
  54
  55         spin_lock_init(&gl->gl_lockref.lock);
  56         INIT_LIST_HEAD(&gl->gl_holders);
  57         INIT_LIST_HEAD(&gl->gl_lru);
  58         INIT_LIST_HEAD(&gl->gl_ail_list);
  59         atomic_set(&gl->gl_ail_count, 0);
  60         atomic_set(&gl->gl_revokes, 0);
  61 }
  62
  63 static void gfs2_init_gl_aspace_once(void *foo)
  64 {
  65         struct gfs2_glock_aspace *gla = foo;
  66
  67         gfs2_init_glock_once(&gla->glock);
  68         address_space_init_once(&gla->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, SLAB_RECLAIM_ACCOUNT,
 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_aspace),
 107                                         0, 0, gfs2_init_gl_aspace_once);
 108
 109         if (!gfs2_glock_aspace_cachep)
 110                 goto fail_cachep2;
 111
 112         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
 113                                               sizeof(struct gfs2_inode),
 114                                               0,  SLAB_RECLAIM_ACCOUNT|
 115                                                   SLAB_MEM_SPREAD|
 116                                                   SLAB_ACCOUNT,
 117                                               gfs2_init_inode_once);
 118         if (!gfs2_inode_cachep)
 119                 goto fail_cachep3;
 120
 121         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
 122                                                 sizeof(struct gfs2_bufdata),
 123                                                 0, 0, NULL);
 124         if (!gfs2_bufdata_cachep)
 125                 goto fail_cachep4;
 126
 127         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
 128                                               sizeof(struct gfs2_rgrpd),
 129                                               0, 0, NULL);
 130         if (!gfs2_rgrpd_cachep)
 131                 goto fail_cachep5;
 132
 133         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 134                                                sizeof(struct gfs2_quota_data),
 135                                                0, SLAB_RECLAIM_ACCOUNT, NULL);
 136         if (!gfs2_quotad_cachep)
 137                 goto fail_cachep6;
 138
 139         gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
 140                                                sizeof(struct gfs2_qadata),
 141                                                0, 0, NULL);
 142         if (!gfs2_qadata_cachep)
 143                 goto fail_cachep7;
 144
 145         gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
 146                                                sizeof(struct gfs2_trans),
 147                                                0, 0, NULL);
 148         if (!gfs2_trans_cachep)
 149                 goto fail_cachep8;
 150
 151         error = register_shrinker(&gfs2_qd_shrinker);
 152         if (error)
 153                 goto fail_shrinker;
 154
 155         error = register_filesystem(&gfs2_fs_type);
 156         if (error)
 157                 goto fail_fs1;
 158
 159         error = register_filesystem(&gfs2meta_fs_type);
 160         if (error)
 161                 goto fail_fs2;
 162
 163         error = -ENOMEM;
 164         gfs_recovery_wq = alloc_workqueue("gfs_recovery",
 165                                           WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
 166         if (!gfs_recovery_wq)
 167                 goto fail_wq1;
 168
 169         gfs2_control_wq = alloc_workqueue("gfs2_control",
 170                                           WQ_UNBOUND | WQ_FREEZABLE, 0);
 171         if (!gfs2_control_wq)
 172                 goto fail_wq2;
 173
 174         gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
 175
 176         if (!gfs2_freeze_wq)
 177                 goto fail_wq3;
 178
 179         gfs2_page_pool = mempool_create_page_pool(64, 0);
 180         if (!gfs2_page_pool)
 181                 goto fail_mempool;
 182
 183         gfs2_register_debugfs();
 184
 185         pr_info("GFS2 installed\n");
 186
 187         return 0;
 188
 189 fail_mempool:
 190         destroy_workqueue(gfs2_freeze_wq);
 191 fail_wq3:
 192         destroy_workqueue(gfs2_control_wq);
 193 fail_wq2:
 194         destroy_workqueue(gfs_recovery_wq);
 195 fail_wq1:
 196         unregister_filesystem(&gfs2meta_fs_type);
 197 fail_fs2:
 198         unregister_filesystem(&gfs2_fs_type);
 199 fail_fs1:
 200         unregister_shrinker(&gfs2_qd_shrinker);
 201 fail_shrinker:
 202         kmem_cache_destroy(gfs2_trans_cachep);
 203 fail_cachep8:
 204         kmem_cache_destroy(gfs2_qadata_cachep);
 205 fail_cachep7:
 206         kmem_cache_destroy(gfs2_quotad_cachep);
 207 fail_cachep6:
 208         kmem_cache_destroy(gfs2_rgrpd_cachep);
 209 fail_cachep5:
 210         kmem_cache_destroy(gfs2_bufdata_cachep);
 211 fail_cachep4:
 212         kmem_cache_destroy(gfs2_inode_cachep);
 213 fail_cachep3:
 214         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 215 fail_cachep2:
 216         kmem_cache_destroy(gfs2_glock_cachep);
 217 fail_cachep1:
 218         gfs2_glock_exit();
 219 fail_glock:
 220         list_lru_destroy(&gfs2_qd_lru);
 221 fail_lru:
 222         gfs2_sys_uninit();
 223         return error;
 224 }
 225
 226 /**
 227  * exit_gfs2_fs - Unregister the file system
 228  *
 229  */
 230
 231 static void __exit exit_gfs2_fs(void)
 232 {
 233         unregister_shrinker(&gfs2_qd_shrinker);
 234         gfs2_glock_exit();
 235         gfs2_unregister_debugfs();
 236         unregister_filesystem(&gfs2_fs_type);
 237         unregister_filesystem(&gfs2meta_fs_type);
 238         destroy_workqueue(gfs_recovery_wq);
 239         destroy_workqueue(gfs2_control_wq);
 240         destroy_workqueue(gfs2_freeze_wq);
 241         list_lru_destroy(&gfs2_qd_lru);
 242
 243         rcu_barrier();
 244
 245         mempool_destroy(gfs2_page_pool);
 246         kmem_cache_destroy(gfs2_trans_cachep);
 247         kmem_cache_destroy(gfs2_qadata_cachep);
 248         kmem_cache_destroy(gfs2_quotad_cachep);
 249         kmem_cache_destroy(gfs2_rgrpd_cachep);
 250         kmem_cache_destroy(gfs2_bufdata_cachep);
 251         kmem_cache_destroy(gfs2_inode_cachep);
 252         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 253         kmem_cache_destroy(gfs2_glock_cachep);
 254
 255         gfs2_sys_uninit();
 256 }
 257
 258 MODULE_DESCRIPTION("Global File System");
 259 MODULE_AUTHOR("Red Hat, Inc.");
 260 MODULE_LICENSE("GPL");
 261
 262 module_init(init_gfs2_fs);
 263 module_exit(exit_gfs2_fs);
 264