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_MEM_SPREAD|
 115                                                   SLAB_ACCOUNT,
 116                                               gfs2_init_inode_once);
 117         if (!gfs2_inode_cachep)
 118                 goto fail_cachep3;
 119
 120         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
 121                                                 sizeof(struct gfs2_bufdata),
 122                                                 0, 0, NULL);
 123         if (!gfs2_bufdata_cachep)
 124                 goto fail_cachep4;
 125
 126         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
 127                                               sizeof(struct gfs2_rgrpd),
 128                                               0, 0, NULL);
 129         if (!gfs2_rgrpd_cachep)
 130                 goto fail_cachep5;
 131
 132         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 133                                                sizeof(struct gfs2_quota_data),
 134                                                0, SLAB_RECLAIM_ACCOUNT, NULL);
 135         if (!gfs2_quotad_cachep)
 136                 goto fail_cachep6;
 137
 138         gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
 139                                                sizeof(struct gfs2_qadata),
 140                                                0, 0, NULL);
 141         if (!gfs2_qadata_cachep)
 142                 goto fail_cachep7;
 143
 144         gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
 145                                                sizeof(struct gfs2_trans),
 146                                                0, 0, NULL);
 147         if (!gfs2_trans_cachep)
 148                 goto fail_cachep8;
 149
 150         error = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd");
 151         if (error)
 152                 goto fail_shrinker;
 153
 154         error = -ENOMEM;
 155         gfs_recovery_wq = alloc_workqueue("gfs_recovery",
 156                                           WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
 157         if (!gfs_recovery_wq)
 158                 goto fail_wq1;
 159
 160         gfs2_control_wq = alloc_workqueue("gfs2_control",
 161                                           WQ_UNBOUND | WQ_FREEZABLE, 0);
 162         if (!gfs2_control_wq)
 163                 goto fail_wq2;
 164
 165         gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
 166
 167         if (!gfs2_freeze_wq)
 168                 goto fail_wq3;
 169
 170         gfs2_page_pool = mempool_create_page_pool(64, 0);
 171         if (!gfs2_page_pool)
 172                 goto fail_mempool;
 173
 174         gfs2_register_debugfs();
 175         error = register_filesystem(&gfs2_fs_type);
 176         if (error)
 177                 goto fail_fs1;
 178
 179         error = register_filesystem(&gfs2meta_fs_type);
 180         if (error)
 181                 goto fail_fs2;
 182
 183
 184         pr_info("GFS2 installed\n");
 185
 186         return 0;
 187
 188 fail_fs2:
 189         unregister_filesystem(&gfs2_fs_type);
 190 fail_fs1:
 191         mempool_destroy(gfs2_page_pool);
 192 fail_mempool:
 193         destroy_workqueue(gfs2_freeze_wq);
 194 fail_wq3:
 195         destroy_workqueue(gfs2_control_wq);
 196 fail_wq2:
 197         destroy_workqueue(gfs_recovery_wq);
 198 fail_wq1:
 199         unregister_shrinker(&gfs2_qd_shrinker);
 200 fail_shrinker:
 201         kmem_cache_destroy(gfs2_trans_cachep);
 202 fail_cachep8:
 203         kmem_cache_destroy(gfs2_qadata_cachep);
 204 fail_cachep7:
 205         kmem_cache_destroy(gfs2_quotad_cachep);
 206 fail_cachep6:
 207         kmem_cache_destroy(gfs2_rgrpd_cachep);
 208 fail_cachep5:
 209         kmem_cache_destroy(gfs2_bufdata_cachep);
 210 fail_cachep4:
 211         kmem_cache_destroy(gfs2_inode_cachep);
 212 fail_cachep3:
 213         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 214 fail_cachep2:
 215         kmem_cache_destroy(gfs2_glock_cachep);
 216 fail_cachep1:
 217         gfs2_glock_exit();
 218 fail_glock:
 219         list_lru_destroy(&gfs2_qd_lru);
 220 fail_lru:
 221         gfs2_sys_uninit();
 222         return error;
 223 }
 224
 225 /**
 226  * exit_gfs2_fs - Unregister the file system
 227  *
 228  */
 229
 230 static void __exit exit_gfs2_fs(void)
 231 {
 232         unregister_shrinker(&gfs2_qd_shrinker);
 233         gfs2_glock_exit();
 234         gfs2_unregister_debugfs();
 235         unregister_filesystem(&gfs2_fs_type);
 236         unregister_filesystem(&gfs2meta_fs_type);
 237         destroy_workqueue(gfs_recovery_wq);
 238         destroy_workqueue(gfs2_control_wq);
 239         destroy_workqueue(gfs2_freeze_wq);
 240         list_lru_destroy(&gfs2_qd_lru);
 241
 242         rcu_barrier();
 243
 244         mempool_destroy(gfs2_page_pool);
 245         kmem_cache_destroy(gfs2_trans_cachep);
 246         kmem_cache_destroy(gfs2_qadata_cachep);
 247         kmem_cache_destroy(gfs2_quotad_cachep);
 248         kmem_cache_destroy(gfs2_rgrpd_cachep);
 249         kmem_cache_destroy(gfs2_bufdata_cachep);
 250         kmem_cache_destroy(gfs2_inode_cachep);
 251         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 252         kmem_cache_destroy(gfs2_glock_cachep);
 253
 254         gfs2_sys_uninit();
 255 }
 256
 257 MODULE_DESCRIPTION("Global File System");
 258 MODULE_AUTHOR("Red Hat, Inc.");
 259 MODULE_LICENSE("GPL");
 260
 261 module_init(init_gfs2_fs);
 262 module_exit(exit_gfs2_fs);
 263