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         INIT_LIST_HEAD(&gl->gl_holders);
  55         INIT_LIST_HEAD(&gl->gl_lru);
  56         INIT_LIST_HEAD(&gl->gl_ail_list);
  57         atomic_set(&gl->gl_ail_count, 0);
  58         atomic_set(&gl->gl_revokes, 0);
  59 }
  60
  61 static void gfs2_init_gl_aspace_once(void *foo)
  62 {
  63         struct gfs2_glock_aspace *gla = foo;
  64
  65         gfs2_init_glock_once(&gla->glock);
  66         address_space_init_once(&gla->mapping);
  67 }
  68
  69 /**
  70  * init_gfs2_fs - Register GFS2 as a filesystem
  71  *
  72  * Returns: 0 on success, error code on failure
  73  */
  74
  75 static int __init init_gfs2_fs(void)
  76 {
  77         int error;
  78
  79         gfs2_str2qstr(&gfs2_qdot, ".");
  80         gfs2_str2qstr(&gfs2_qdotdot, "..");
  81         gfs2_quota_hash_init();
  82
  83         error = gfs2_sys_init();
  84         if (error)
  85                 return error;
  86
  87         error = list_lru_init(&gfs2_qd_lru);
  88         if (error)
  89                 goto fail_lru;
  90
  91         error = gfs2_glock_init();
  92         if (error)
  93                 goto fail_glock;
  94
  95         error = -ENOMEM;
  96         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
  97                                               sizeof(struct gfs2_glock),
  98                                               0, SLAB_RECLAIM_ACCOUNT,
  99                                               gfs2_init_glock_once);
 100         if (!gfs2_glock_cachep)
 101                 goto fail_cachep1;
 102
 103         gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
 104                                         sizeof(struct gfs2_glock_aspace),
 105                                         0, 0, gfs2_init_gl_aspace_once);
 106
 107         if (!gfs2_glock_aspace_cachep)
 108                 goto fail_cachep2;
 109
 110         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
 111                                               sizeof(struct gfs2_inode),
 112                                               0,  SLAB_RECLAIM_ACCOUNT|
 113                                                   SLAB_ACCOUNT,
 114                                               gfs2_init_inode_once);
 115         if (!gfs2_inode_cachep)
 116                 goto fail_cachep3;
 117
 118         gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
 119                                                 sizeof(struct gfs2_bufdata),
 120                                                 0, 0, NULL);
 121         if (!gfs2_bufdata_cachep)
 122                 goto fail_cachep4;
 123
 124         gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
 125                                               sizeof(struct gfs2_rgrpd),
 126                                               0, 0, NULL);
 127         if (!gfs2_rgrpd_cachep)
 128                 goto fail_cachep5;
 129
 130         gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
 131                                                sizeof(struct gfs2_quota_data),
 132                                                0, SLAB_RECLAIM_ACCOUNT, NULL);
 133         if (!gfs2_quotad_cachep)
 134                 goto fail_cachep6;
 135
 136         gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
 137                                                sizeof(struct gfs2_qadata),
 138                                                0, 0, NULL);
 139         if (!gfs2_qadata_cachep)
 140                 goto fail_cachep7;
 141
 142         gfs2_trans_cachep = kmem_cache_create("gfs2_trans",
 143                                                sizeof(struct gfs2_trans),
 144                                                0, 0, NULL);
 145         if (!gfs2_trans_cachep)
 146                 goto fail_cachep8;
 147
 148         error = gfs2_qd_shrinker_init();
 149         if (error)
 150                 goto fail_shrinker;
 151
 152         error = -ENOMEM;
 153         gfs2_recovery_wq = alloc_workqueue("gfs2_recovery",
 154                                           WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
 155         if (!gfs2_recovery_wq)
 156                 goto fail_wq1;
 157
 158         gfs2_control_wq = alloc_workqueue("gfs2_control",
 159                                           WQ_UNBOUND | WQ_FREEZABLE, 0);
 160         if (!gfs2_control_wq)
 161                 goto fail_wq2;
 162
 163         gfs2_freeze_wq = alloc_workqueue("gfs2_freeze", 0, 0);
 164
 165         if (!gfs2_freeze_wq)
 166                 goto fail_wq3;
 167
 168         gfs2_page_pool = mempool_create_page_pool(64, 0);
 169         if (!gfs2_page_pool)
 170                 goto fail_mempool;
 171
 172         gfs2_register_debugfs();
 173         error = register_filesystem(&gfs2_fs_type);
 174         if (error)
 175                 goto fail_fs1;
 176
 177         error = register_filesystem(&gfs2meta_fs_type);
 178         if (error)
 179                 goto fail_fs2;
 180
 181
 182         pr_info("GFS2 installed\n");
 183
 184         return 0;
 185
 186 fail_fs2:
 187         unregister_filesystem(&gfs2_fs_type);
 188 fail_fs1:
 189         mempool_destroy(gfs2_page_pool);
 190 fail_mempool:
 191         destroy_workqueue(gfs2_freeze_wq);
 192 fail_wq3:
 193         destroy_workqueue(gfs2_control_wq);
 194 fail_wq2:
 195         destroy_workqueue(gfs2_recovery_wq);
 196 fail_wq1:
 197         gfs2_qd_shrinker_exit();
 198 fail_shrinker:
 199         kmem_cache_destroy(gfs2_trans_cachep);
 200 fail_cachep8:
 201         kmem_cache_destroy(gfs2_qadata_cachep);
 202 fail_cachep7:
 203         kmem_cache_destroy(gfs2_quotad_cachep);
 204 fail_cachep6:
 205         kmem_cache_destroy(gfs2_rgrpd_cachep);
 206 fail_cachep5:
 207         kmem_cache_destroy(gfs2_bufdata_cachep);
 208 fail_cachep4:
 209         kmem_cache_destroy(gfs2_inode_cachep);
 210 fail_cachep3:
 211         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 212 fail_cachep2:
 213         kmem_cache_destroy(gfs2_glock_cachep);
 214 fail_cachep1:
 215         gfs2_glock_exit();
 216 fail_glock:
 217         list_lru_destroy(&gfs2_qd_lru);
 218 fail_lru:
 219         gfs2_sys_uninit();
 220         return error;
 221 }
 222
 223 /**
 224  * exit_gfs2_fs - Unregister the file system
 225  *
 226  */
 227
 228 static void __exit exit_gfs2_fs(void)
 229 {
 230         gfs2_qd_shrinker_exit();
 231         gfs2_glock_exit();
 232         gfs2_unregister_debugfs();
 233         unregister_filesystem(&gfs2_fs_type);
 234         unregister_filesystem(&gfs2meta_fs_type);
 235         destroy_workqueue(gfs2_recovery_wq);
 236         destroy_workqueue(gfs2_control_wq);
 237         destroy_workqueue(gfs2_freeze_wq);
 238         list_lru_destroy(&gfs2_qd_lru);
 239
 240         rcu_barrier();
 241
 242         mempool_destroy(gfs2_page_pool);
 243         kmem_cache_destroy(gfs2_trans_cachep);
 244         kmem_cache_destroy(gfs2_qadata_cachep);
 245         kmem_cache_destroy(gfs2_quotad_cachep);
 246         kmem_cache_destroy(gfs2_rgrpd_cachep);
 247         kmem_cache_destroy(gfs2_bufdata_cachep);
 248         kmem_cache_destroy(gfs2_inode_cachep);
 249         kmem_cache_destroy(gfs2_glock_aspace_cachep);
 250         kmem_cache_destroy(gfs2_glock_cachep);
 251
 252         gfs2_sys_uninit();
 253 }
 254
 255 MODULE_DESCRIPTION("Global File System");
 256 MODULE_AUTHOR("Red Hat, Inc.");
 257 MODULE_LICENSE("GPL");
 258
 259 module_init(init_gfs2_fs);
 260 module_exit(exit_gfs2_fs);
 261