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_ordered);
  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_aspace *gla = foo;
  65
  66         gfs2_init_glock_once(&gla->glock);
  67         address_space_init_once(&gla->mapping);
  68 }
  69
  70 /**
  71  * init_gfs2_fs - Register GFS2 as a filesystem
  72  *
  73  * Returns: 0 on success, error code on failure
  74  */
  75
  76 static int __init init_gfs2_fs(void)
  77 {
  78         int error;
  79
  80         gfs2_str2qstr(&gfs2_qdot, ".");
  81         gfs2_str2qstr(&gfs2_qdotdot, "..");
  82         gfs2_quota_hash_init();
  83
  84         error = gfs2_sys_init();
  85         if (error)
  86                 return error;
  87
  88         error = list_lru_init(&gfs2_qd_lru);
  89         if (error)
  90                 goto fail_lru;
  91
  92         error = gfs2_glock_init();
  93         if (error)
  94                 goto fail_glock;
  95
  96         error = -ENOMEM;
  97         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  98                                               sizeof(struct gfs2_glock),
  99                                               0, SLAB_RECLAIM_ACCOUNT,
 100                                               gfs2_init_glock_once);
 101         if (!gfs2_glock_cachep)
 102                 goto fail_cachep1;
 103
 104         gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
 105                                         sizeof(struct gfs2_glock_aspace),
 106                                         0, 0, gfs2_init_gl_aspace_once);
 107
 108         if (!gfs2_glock_aspace_cachep)
 109                 goto fail_cachep2;
 110
 111         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
 112                                               sizeof(struct gfs2_inode),
 113                                               0,  SLAB_RECLAIM_ACCOUNT|
 114                                                   SLAB_ACCOUNT,
 115                                               gfs2_init_inode_once);
 116         if (!gfs2_inode_cachep)
 117                 goto fail_cachep3;
 118
 119         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
 120                                                 sizeof(struct gfs2_bufdata),
 121                                                 0, 0, NULL);
 122         if (!gfs2_bufdata_cachep)
 123                 goto fail_cachep4;
 124
 125         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
 126                                               sizeof(struct gfs2_rgrpd),
 127                                               0, 0, NULL);
 128         if (!gfs2_rgrpd_cachep)
 129                 goto fail_cachep5;
 130
 131         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 132                                                sizeof(struct gfs2_quota_data),
 133                                                0, SLAB_RECLAIM_ACCOUNT, NULL);
 134         if (!gfs2_quotad_cachep)
 135                 goto fail_cachep6;
 136
 137         gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
 138                                                sizeof(struct gfs2_qadata),
 139                                                0, 0, NULL);
 140         if (!gfs2_qadata_cachep)
 141                 goto fail_cachep7;
 142
 143         gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
 144                                                sizeof(struct gfs2_trans),
 145                                                0, 0, NULL);
 146         if (!gfs2_trans_cachep)
 147                 goto fail_cachep8;
 148
 149         error = gfs2_qd_shrinker_init();
 150         if (error)
 151                 goto fail_shrinker;
 152
 153         error = -ENOMEM;
 154         gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
 155                                           WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
 156         if (!gfs2_recovery_wq)
 157                 goto fail_wq1;
 158
 159         gfs2_control_wq = alloc_workqueue("gfs2_control",
 160                                           WQ_UNBOUND | WQ_FREEZABLE, 0);
 161         if (!gfs2_control_wq)
 162                 goto fail_wq2;
 163
 164         gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", 0, 0);
 165
 166         if (!gfs2_freeze_wq)
 167                 goto fail_wq3;
 168
 169         gfs2_page_pool = mempool_create_page_pool(64, 0);
 170         if (!gfs2_page_pool)
 171                 goto fail_mempool;
 172
 173         gfs2_register_debugfs();
 174         error = register_filesystem(&gfs2_fs_type);
 175         if (error)
 176                 goto fail_fs1;
 177
 178         error = register_filesystem(&gfs2meta_fs_type);
 179         if (error)
 180                 goto fail_fs2;
 181
 182
 183         pr_info("GFS2 installed\n");
 184
 185         return 0;
 186
 187 fail_fs2:
 188         unregister_filesystem(&gfs2_fs_type);
 189 fail_fs1:
 190         mempool_destroy(gfs2_page_pool);
 191 fail_mempool:
 192         destroy_workqueue(gfs2_freeze_wq);
 193 fail_wq3:
 194         destroy_workqueue(gfs2_control_wq);
 195 fail_wq2:
 196         destroy_workqueue(gfs2_recovery_wq);
 197 fail_wq1:
 198         gfs2_qd_shrinker_exit();
 199 fail_shrinker:
 200         kmem_cache_destroy(gfs2_trans_cachep);
 201 fail_cachep8:
 202         kmem_cache_destroy(gfs2_qadata_cachep);
 203 fail_cachep7:
 204         kmem_cache_destroy(gfs2_quotad_cachep);
 205 fail_cachep6:
 206         kmem_cache_destroy(gfs2_rgrpd_cachep);
 207 fail_cachep5:
 208         kmem_cache_destroy(gfs2_bufdata_cachep);
 209 fail_cachep4:
 210         kmem_cache_destroy(gfs2_inode_cachep);
 211 fail_cachep3:
 212         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 213 fail_cachep2:
 214         kmem_cache_destroy(gfs2_glock_cachep);
 215 fail_cachep1:
 216         gfs2_glock_exit();
 217 fail_glock:
 218         list_lru_destroy(&gfs2_qd_lru);
 219 fail_lru:
 220         gfs2_sys_uninit();
 221         return error;
 222 }
 223
 224 /**
 225  * exit_gfs2_fs - Unregister the file system
 226  *
 227  */
 228
 229 static void __exit exit_gfs2_fs(void)
 230 {
 231         gfs2_qd_shrinker_exit();
 232         gfs2_glock_exit();
 233         gfs2_unregister_debugfs();
 234         unregister_filesystem(&gfs2_fs_type);
 235         unregister_filesystem(&gfs2meta_fs_type);
 236         destroy_workqueue(gfs2_recovery_wq);
 237         destroy_workqueue(gfs2_control_wq);
 238         destroy_workqueue(gfs2_freeze_wq);
 239         list_lru_destroy(&gfs2_qd_lru);
 240
 241         rcu_barrier();
 242
 243         mempool_destroy(gfs2_page_pool);
 244         kmem_cache_destroy(gfs2_trans_cachep);
 245         kmem_cache_destroy(gfs2_qadata_cachep);
 246         kmem_cache_destroy(gfs2_quotad_cachep);
 247         kmem_cache_destroy(gfs2_rgrpd_cachep);
 248         kmem_cache_destroy(gfs2_bufdata_cachep);
 249         kmem_cache_destroy(gfs2_inode_cachep);
 250         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 251         kmem_cache_destroy(gfs2_glock_cachep);
 252
 253         gfs2_sys_uninit();
 254 }
 255
 256 MODULE_DESCRIPTION("Global File System");
 257 MODULE_AUTHOR("Red Hat, Inc.");
 258 MODULE_LICENSE("GPL");
 259
 260 module_init(init_gfs2_fs);
 261 module_exit(exit_gfs2_fs);
 262