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 *gl = foo;
  66         struct address_space *mapping = (struct address_space *)(gl + 1);
  67
  68         gfs2_init_glock_once(gl);
  69         address_space_init_once(mapping);
  70 }
  71
  72 /**
  73  * init_gfs2_fs - Register GFS2 as a filesystem
  74  *
  75  * Returns: 0 on success, error code on failure
  76  */
  77
  78 static int __init init_gfs2_fs(void)
  79 {
  80         int error;
  81
  82         gfs2_str2qstr(&gfs2_qdot, ".");
  83         gfs2_str2qstr(&gfs2_qdotdot, "..");
  84         gfs2_quota_hash_init();
  85
  86         error = gfs2_sys_init();
  87         if (error)
  88                 return error;
  89
  90         error = list_lru_init(&gfs2_qd_lru);
  91         if (error)
  92                 goto fail_lru;
  93
  94         error = gfs2_glock_init();
  95         if (error)
  96                 goto fail_glock;
  97
  98         error = -ENOMEM;
  99         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
 100                                               sizeof(struct gfs2_glock),
 101                                               0, 0,
 102                                               gfs2_init_glock_once);
 103         if (!gfs2_glock_cachep)
 104                 goto fail_cachep1;
 105
 106         gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
 107                                         sizeof(struct gfs2_glock) +
 108                                         sizeof(struct address_space),
 109                                         0, 0, gfs2_init_gl_aspace_once);
 110
 111         if (!gfs2_glock_aspace_cachep)
 112                 goto fail_cachep2;
 113
 114         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
 115                                               sizeof(struct gfs2_inode),
 116                                               0,  SLAB_RECLAIM_ACCOUNT|
 117                                                   SLAB_MEM_SPREAD|
 118                                                   SLAB_ACCOUNT,
 119                                               gfs2_init_inode_once);
 120         if (!gfs2_inode_cachep)
 121                 goto fail_cachep3;
 122
 123         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
 124                                                 sizeof(struct gfs2_bufdata),
 125                                                 0, 0, NULL);
 126         if (!gfs2_bufdata_cachep)
 127                 goto fail_cachep4;
 128
 129         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
 130                                               sizeof(struct gfs2_rgrpd),
 131                                               0, 0, NULL);
 132         if (!gfs2_rgrpd_cachep)
 133                 goto fail_cachep5;
 134
 135         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 136                                                sizeof(struct gfs2_quota_data),
 137                                                0, 0, NULL);
 138         if (!gfs2_quotad_cachep)
 139                 goto fail_cachep6;
 140
 141         gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
 142                                                sizeof(struct gfs2_qadata),
 143                                                0, 0, NULL);
 144         if (!gfs2_qadata_cachep)
 145                 goto fail_cachep7;
 146
 147         gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
 148                                                sizeof(struct gfs2_trans),
 149                                                0, 0, NULL);
 150         if (!gfs2_trans_cachep)
 151                 goto fail_cachep8;
 152
 153         error = register_shrinker(&gfs2_qd_shrinker);
 154         if (error)
 155                 goto fail_shrinker;
 156
 157         error = register_filesystem(&gfs2_fs_type);
 158         if (error)
 159                 goto fail_fs1;
 160
 161         error = register_filesystem(&gfs2meta_fs_type);
 162         if (error)
 163                 goto fail_fs2;
 164
 165         error = -ENOMEM;
 166         gfs_recovery_wq = alloc_workqueue("gfs_recovery",
 167                                           WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
 168         if (!gfs_recovery_wq)
 169                 goto fail_wq1;
 170
 171         gfs2_control_wq = alloc_workqueue("gfs2_control",
 172                                           WQ_UNBOUND | WQ_FREEZABLE, 0);
 173         if (!gfs2_control_wq)
 174                 goto fail_wq2;
 175
 176         gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
 177
 178         if (!gfs2_freeze_wq)
 179                 goto fail_wq3;
 180
 181         gfs2_page_pool = mempool_create_page_pool(64, 0);
 182         if (!gfs2_page_pool)
 183                 goto fail_mempool;
 184
 185         gfs2_register_debugfs();
 186
 187         pr_info("GFS2 installed\n");
 188
 189         return 0;
 190
 191 fail_mempool:
 192         destroy_workqueue(gfs2_freeze_wq);
 193 fail_wq3:
 194         destroy_workqueue(gfs2_control_wq);
 195 fail_wq2:
 196         destroy_workqueue(gfs_recovery_wq);
 197 fail_wq1:
 198         unregister_filesystem(&gfs2meta_fs_type);
 199 fail_fs2:
 200         unregister_filesystem(&gfs2_fs_type);
 201 fail_fs1:
 202         unregister_shrinker(&gfs2_qd_shrinker);
 203 fail_shrinker:
 204         kmem_cache_destroy(gfs2_trans_cachep);
 205 fail_cachep8:
 206         kmem_cache_destroy(gfs2_qadata_cachep);
 207 fail_cachep7:
 208         kmem_cache_destroy(gfs2_quotad_cachep);
 209 fail_cachep6:
 210         kmem_cache_destroy(gfs2_rgrpd_cachep);
 211 fail_cachep5:
 212         kmem_cache_destroy(gfs2_bufdata_cachep);
 213 fail_cachep4:
 214         kmem_cache_destroy(gfs2_inode_cachep);
 215 fail_cachep3:
 216         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 217 fail_cachep2:
 218         kmem_cache_destroy(gfs2_glock_cachep);
 219 fail_cachep1:
 220         gfs2_glock_exit();
 221 fail_glock:
 222         list_lru_destroy(&gfs2_qd_lru);
 223 fail_lru:
 224         gfs2_sys_uninit();
 225         return error;
 226 }
 227
 228 /**
 229  * exit_gfs2_fs - Unregister the file system
 230  *
 231  */
 232
 233 static void __exit exit_gfs2_fs(void)
 234 {
 235         unregister_shrinker(&gfs2_qd_shrinker);
 236         gfs2_glock_exit();
 237         gfs2_unregister_debugfs();
 238         unregister_filesystem(&gfs2_fs_type);
 239         unregister_filesystem(&gfs2meta_fs_type);
 240         destroy_workqueue(gfs_recovery_wq);
 241         destroy_workqueue(gfs2_control_wq);
 242         destroy_workqueue(gfs2_freeze_wq);
 243         list_lru_destroy(&gfs2_qd_lru);
 244
 245         rcu_barrier();
 246
 247         mempool_destroy(gfs2_page_pool);
 248         kmem_cache_destroy(gfs2_trans_cachep);
 249         kmem_cache_destroy(gfs2_qadata_cachep);
 250         kmem_cache_destroy(gfs2_quotad_cachep);
 251         kmem_cache_destroy(gfs2_rgrpd_cachep);
 252         kmem_cache_destroy(gfs2_bufdata_cachep);
 253         kmem_cache_destroy(gfs2_inode_cachep);
 254         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 255         kmem_cache_destroy(gfs2_glock_cachep);
 256
 257         gfs2_sys_uninit();
 258 }
 259
 260 MODULE_DESCRIPTION("Global File System");
 261 MODULE_AUTHOR("Red Hat, Inc.");
 262 MODULE_LICENSE("GPL");
 263
 264 module_init(init_gfs2_fs);
 265 module_exit(exit_gfs2_fs);
 266