fs/gfs2/ops_fstype.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/blkdev.h>
  16 #include <linux/kthread.h>
  17 #include <linux/namei.h>
  18 #include <linux/mount.h>
  19 #include <linux/gfs2_ondisk.h>
  20 #include <linux/lm_interface.h>
  21
  22 #include "gfs2.h"
  23 #include "incore.h"
  24 #include "bmap.h"
  25 #include "glock.h"
  26 #include "glops.h"
  27 #include "inode.h"
  28 #include "mount.h"
  29 #include "recovery.h"
  30 #include "rgrp.h"
  31 #include "super.h"
  32 #include "sys.h"
  33 #include "util.h"
  34 #include "log.h"
  35 #include "quota.h"
  36
  37 #define DO 0
  38 #define UNDO 1
  39
  40 static const u32 gfs2_old_fs_formats[] = {
  41         0
  42 };
  43
  44 static const u32 gfs2_old_multihost_formats[] = {
  45         0
  46 };
  47
  48 /**
  49  * gfs2_tune_init - Fill a gfs2_tune structure with default values
  50  * @gt: tune
  51  *
  52  */
  53
  54 static void gfs2_tune_init(struct gfs2_tune *gt)
  55 {
  56         spin_lock_init(&gt->gt_spin);
  57
  58         gt->gt_incore_log_blocks = 1024;
  59         gt->gt_log_flush_secs = 60;
  60         gt->gt_recoverd_secs = 60;
  61         gt->gt_logd_secs = 1;
  62         gt->gt_quota_simul_sync = 64;
  63         gt->gt_quota_warn_period = 10;
  64         gt->gt_quota_scale_num = 1;
  65         gt->gt_quota_scale_den = 1;
  66         gt->gt_quota_cache_secs = 300;
  67         gt->gt_quota_quantum = 60;
  68         gt->gt_new_files_jdata = 0;
  69         gt->gt_max_readahead = 1 << 18;
  70         gt->gt_stall_secs = 600;
  71         gt->gt_complain_secs = 10;
  72         gt->gt_statfs_quantum = 30;
  73         gt->gt_statfs_slow = 0;
  74 }
  75
  76 static struct gfs2_sbd *init_sbd(struct super_block *sb)
  77 {
  78         struct gfs2_sbd *sdp;
  79
  80         sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
  81         if (!sdp)
  82                 return NULL;
  83
  84         sb->s_fs_info = sdp;
  85         sdp->sd_vfs = sb;
  86
  87         gfs2_tune_init(&sdp->sd_tune);
  88
  89         mutex_init(&sdp->sd_inum_mutex);
  90         spin_lock_init(&sdp->sd_statfs_spin);
  91
  92         spin_lock_init(&sdp->sd_rindex_spin);
  93         mutex_init(&sdp->sd_rindex_mutex);
  94         INIT_LIST_HEAD(&sdp->sd_rindex_list);
  95         INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
  96
  97         INIT_LIST_HEAD(&sdp->sd_jindex_list);
  98         spin_lock_init(&sdp->sd_jindex_spin);
  99         mutex_init(&sdp->sd_jindex_mutex);
 100
 101         INIT_LIST_HEAD(&sdp->sd_quota_list);
 102         spin_lock_init(&sdp->sd_quota_spin);
 103         mutex_init(&sdp->sd_quota_mutex);
 104         init_waitqueue_head(&sdp->sd_quota_wait);
 105         INIT_LIST_HEAD(&sdp->sd_trunc_list);
 106         spin_lock_init(&sdp->sd_trunc_lock);
 107
 108         spin_lock_init(&sdp->sd_log_lock);
 109
 110         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
 111         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
 112         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
 113         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
 114         INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
 115
 116         mutex_init(&sdp->sd_log_reserve_mutex);
 117         INIT_LIST_HEAD(&sdp->sd_ail1_list);
 118         INIT_LIST_HEAD(&sdp->sd_ail2_list);
 119
 120         init_rwsem(&sdp->sd_log_flush_lock);
 121         atomic_set(&sdp->sd_log_in_flight, 0);
 122         init_waitqueue_head(&sdp->sd_log_flush_wait);
 123
 124         INIT_LIST_HEAD(&sdp->sd_revoke_list);
 125
 126         mutex_init(&sdp->sd_freeze_lock);
 127
 128         return sdp;
 129 }
 130
 131
 132 /**
 133  * gfs2_check_sb - Check superblock
 134  * @sdp: the filesystem
 135  * @sb: The superblock
 136  * @silent: Don't print a message if the check fails
 137  *
 138  * Checks the version code of the FS is one that we understand how to
 139  * read and that the sizes of the various on-disk structures have not
 140  * changed.
 141  */
 142
 143 static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
 144 {
 145         unsigned int x;
 146
 147         if (sb->sb_magic != GFS2_MAGIC ||
 148             sb->sb_type != GFS2_METATYPE_SB) {
 149                 if (!silent)
 150                         printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
 151                 return -EINVAL;
 152         }
 153
 154         /*  If format numbers match exactly, we're done.  */
 155
 156         if (sb->sb_fs_format == GFS2_FORMAT_FS &&
 157             sb->sb_multihost_format == GFS2_FORMAT_MULTI)
 158                 return 0;
 159
 160         if (sb->sb_fs_format != GFS2_FORMAT_FS) {
 161                 for (x = 0; gfs2_old_fs_formats[x]; x++)
 162                         if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
 163                                 break;
 164
 165                 if (!gfs2_old_fs_formats[x]) {
 166                         printk(KERN_WARNING
 167                                "GFS2: code version (%u, %u) is incompatible "
 168                                "with ondisk format (%u, %u)\n",
 169                                GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
 170                                sb->sb_fs_format, sb->sb_multihost_format);
 171                         printk(KERN_WARNING
 172                                "GFS2: I don't know how to upgrade this FS\n");
 173                         return -EINVAL;
 174                 }
 175         }
 176
 177         if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
 178                 for (x = 0; gfs2_old_multihost_formats[x]; x++)
 179                         if (gfs2_old_multihost_formats[x] ==
 180                             sb->sb_multihost_format)
 181                                 break;
 182
 183                 if (!gfs2_old_multihost_formats[x]) {
 184                         printk(KERN_WARNING
 185                                "GFS2: code version (%u, %u) is incompatible "
 186                                "with ondisk format (%u, %u)\n",
 187                                GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
 188                                sb->sb_fs_format, sb->sb_multihost_format);
 189                         printk(KERN_WARNING
 190                                "GFS2: I don't know how to upgrade this FS\n");
 191                         return -EINVAL;
 192                 }
 193         }
 194
 195         if (!sdp->sd_args.ar_upgrade) {
 196                 printk(KERN_WARNING
 197                        "GFS2: code version (%u, %u) is incompatible "
 198                        "with ondisk format (%u, %u)\n",
 199                        GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
 200                        sb->sb_fs_format, sb->sb_multihost_format);
 201                 printk(KERN_INFO
 202                        "GFS2: Use the \"upgrade\" mount option to upgrade "
 203                        "the FS\n");
 204                 printk(KERN_INFO "GFS2: See the manual for more details\n");
 205                 return -EINVAL;
 206         }
 207
 208         return 0;
 209 }
 210
 211 static void end_bio_io_page(struct bio *bio, int error)
 212 {
 213         struct page *page = bio->bi_private;
 214
 215         if (!error)
 216                 SetPageUptodate(page);
 217         else
 218                 printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
 219         unlock_page(page);
 220 }
 221
 222 static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
 223 {
 224         const struct gfs2_sb *str = buf;
 225
 226         sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
 227         sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
 228         sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
 229         sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
 230         sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
 231         sb->sb_bsize = be32_to_cpu(str->sb_bsize);
 232         sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
 233         sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
 234         sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
 235         sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
 236         sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
 237
 238         memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
 239         memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
 240 }
 241
 242 /**
 243  * gfs2_read_super - Read the gfs2 super block from disk
 244  * @sdp: The GFS2 super block
 245  * @sector: The location of the super block
 246  * @error: The error code to return
 247  *
 248  * This uses the bio functions to read the super block from disk
 249  * because we want to be 100% sure that we never read cached data.
 250  * A super block is read twice only during each GFS2 mount and is
 251  * never written to by the filesystem. The first time its read no
 252  * locks are held, and the only details which are looked at are those
 253  * relating to the locking protocol. Once locking is up and working,
 254  * the sb is read again under the lock to establish the location of
 255  * the master directory (contains pointers to journals etc) and the
 256  * root directory.
 257  *
 258  * Returns: 0 on success or error
 259  */
 260
 261 static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
 262 {
 263         struct super_block *sb = sdp->sd_vfs;
 264         struct gfs2_sb *p;
 265         struct page *page;
 266         struct bio *bio;
 267
 268         page = alloc_page(GFP_NOFS);
 269         if (unlikely(!page))
 270                 return -ENOBUFS;
 271
 272         ClearPageUptodate(page);
 273         ClearPageDirty(page);
 274         lock_page(page);
 275
 276         bio = bio_alloc(GFP_NOFS, 1);
 277         if (unlikely(!bio)) {
 278                 __free_page(page);
 279                 return -ENOBUFS;
 280         }
 281
 282         bio->bi_sector = sector * (sb->s_blocksize >> 9);
 283         bio->bi_bdev = sb->s_bdev;
 284         bio_add_page(bio, page, PAGE_SIZE, 0);
 285
 286         bio->bi_end_io = end_bio_io_page;
 287         bio->bi_private = page;
 288         submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
 289         wait_on_page_locked(page);
 290         bio_put(bio);
 291         if (!PageUptodate(page)) {
 292                 __free_page(page);
 293                 return -EIO;
 294         }
 295         p = kmap(page);
 296         gfs2_sb_in(&sdp->sd_sb, p);
 297         kunmap(page);
 298         __free_page(page);
 299         return 0;
 300 }
 301 /**
 302  * gfs2_read_sb - Read super block
 303  * @sdp: The GFS2 superblock
 304  * @gl: the glock for the superblock (assumed to be held)
 305  * @silent: Don't print message if mount fails
 306  *
 307  */
 308
 309 static int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
 310 {
 311         u32 hash_blocks, ind_blocks, leaf_blocks;
 312         u32 tmp_blocks;
 313         unsigned int x;
 314         int error;
 315
 316         error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 317         if (error) {
 318                 if (!silent)
 319                         fs_err(sdp, "can't read superblock\n");
 320                 return error;
 321         }
 322
 323         error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
 324         if (error)
 325                 return error;
 326
 327         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 328                                GFS2_BASIC_BLOCK_SHIFT;
 329         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 330         sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
 331                           sizeof(struct gfs2_dinode)) / sizeof(u64);
 332         sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
 333                           sizeof(struct gfs2_meta_header)) / sizeof(u64);
 334         sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
 335         sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
 336         sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
 337         sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
 338         sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
 339                                 sizeof(struct gfs2_meta_header)) /
 340                                 sizeof(struct gfs2_quota_change);
 341
 342         /* Compute maximum reservation required to add a entry to a directory */
 343
 344         hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
 345                              sdp->sd_jbsize);
 346
 347         ind_blocks = 0;
 348         for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
 349                 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
 350                 ind_blocks += tmp_blocks;
 351         }
 352
 353         leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
 354
 355         sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
 356
 357         sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
 358                                 sizeof(struct gfs2_dinode);
 359         sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
 360         for (x = 2;; x++) {
 361                 u64 space, d;
 362                 u32 m;
 363
 364                 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
 365                 d = space;
 366                 m = do_div(d, sdp->sd_inptrs);
 367
 368                 if (d != sdp->sd_heightsize[x - 1] || m)
 369                         break;
 370                 sdp->sd_heightsize[x] = space;
 371         }
 372         sdp->sd_max_height = x;
 373         sdp->sd_heightsize[x] = ~0;
 374         gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
 375
 376         sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
 377                                  sizeof(struct gfs2_dinode);
 378         sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
 379         for (x = 2;; x++) {
 380                 u64 space, d;
 381                 u32 m;
 382
 383                 space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
 384                 d = space;
 385                 m = do_div(d, sdp->sd_inptrs);
 386
 387                 if (d != sdp->sd_jheightsize[x - 1] || m)
 388                         break;
 389                 sdp->sd_jheightsize[x] = space;
 390         }
 391         sdp->sd_max_jheight = x;
 392         sdp->sd_jheightsize[x] = ~0;
 393         gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
 394
 395         return 0;
 396 }
 397
 398 static int init_names(struct gfs2_sbd *sdp, int silent)
 399 {
 400         char *proto, *table;
 401         int error = 0;
 402
 403         proto = sdp->sd_args.ar_lockproto;
 404         table = sdp->sd_args.ar_locktable;
 405
 406         /*  Try to autodetect  */
 407
 408         if (!proto[0] || !table[0]) {
 409                 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 410                 if (error)
 411                         return error;
 412
 413                 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
 414                 if (error)
 415                         goto out;
 416
 417                 if (!proto[0])
 418                         proto = sdp->sd_sb.sb_lockproto;
 419                 if (!table[0])
 420                         table = sdp->sd_sb.sb_locktable;
 421         }
 422
 423         if (!table[0])
 424                 table = sdp->sd_vfs->s_id;
 425
 426         strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
 427         strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
 428
 429         table = sdp->sd_table_name;
 430         while ((table = strchr(table, '/')))
 431                 *table = '_';
 432
 433 out:
 434         return error;
 435 }
 436
 437 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 438                         int undo)
 439 {
 440         int error = 0;
 441
 442         if (undo)
 443                 goto fail_trans;
 444
 445         error = gfs2_glock_nq_num(sdp,
 446                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 447                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 448                                   mount_gh);
 449         if (error) {
 450                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 451                 goto fail;
 452         }
 453
 454         error = gfs2_glock_nq_num(sdp,
 455                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 456                                   LM_ST_SHARED,
 457                                   LM_FLAG_NOEXP | GL_EXACT,
 458                                   &sdp->sd_live_gh);
 459         if (error) {
 460                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 461                 goto fail_mount;
 462         }
 463
 464         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 465                                CREATE, &sdp->sd_rename_gl);
 466         if (error) {
 467                 fs_err(sdp, "can't create rename glock: %d\n", error);
 468                 goto fail_live;
 469         }
 470
 471         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 472                                CREATE, &sdp->sd_trans_gl);
 473         if (error) {
 474                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 475                 goto fail_rename;
 476         }
 477
 478         return 0;
 479
 480 fail_trans:
 481         gfs2_glock_put(sdp->sd_trans_gl);
 482 fail_rename:
 483         gfs2_glock_put(sdp->sd_rename_gl);
 484 fail_live:
 485         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 486 fail_mount:
 487         gfs2_glock_dq_uninit(mount_gh);
 488 fail:
 489         return error;
 490 }
 491
 492 static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
 493                             u64 no_addr, const char *name)
 494 {
 495         struct gfs2_sbd *sdp = sb->s_fs_info;
 496         struct dentry *dentry;
 497         struct inode *inode;
 498
 499         inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
 500         if (IS_ERR(inode)) {
 501                 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
 502                 return PTR_ERR(inode);
 503         }
 504         dentry = d_alloc_root(inode);
 505         if (!dentry) {
 506                 fs_err(sdp, "can't alloc %s dentry\n", name);
 507                 iput(inode);
 508                 return -ENOMEM;
 509         }
 510         dentry->d_op = &gfs2_dops;
 511         *dptr = dentry;
 512         return 0;
 513 }
 514
 515 static int init_sb(struct gfs2_sbd *sdp, int silent)
 516 {
 517         struct super_block *sb = sdp->sd_vfs;
 518         struct gfs2_holder sb_gh;
 519         u64 no_addr;
 520         int ret;
 521
 522         ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
 523                                 LM_ST_SHARED, 0, &sb_gh);
 524         if (ret) {
 525                 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
 526                 return ret;
 527         }
 528
 529         ret = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 530         if (ret) {
 531                 fs_err(sdp, "can't read superblock: %d\n", ret);
 532                 goto out;
 533         }
 534
 535         /* Set up the buffer cache and SB for real */
 536         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 537                 ret = -EINVAL;
 538                 fs_err(sdp, "FS block size (%u) is too small for device "
 539                        "block size (%u)\n",
 540                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 541                 goto out;
 542         }
 543         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 544                 ret = -EINVAL;
 545                 fs_err(sdp, "FS block size (%u) is too big for machine "
 546                        "page size (%u)\n",
 547                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 548                 goto out;
 549         }
 550         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 551
 552         /* Get the root inode */
 553         no_addr = sdp->sd_sb.sb_root_dir.no_addr;
 554         ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
 555         if (ret)
 556                 goto out;
 557
 558         /* Get the master inode */
 559         no_addr = sdp->sd_sb.sb_master_dir.no_addr;
 560         ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
 561         if (ret) {
 562                 dput(sdp->sd_root_dir);
 563                 goto out;
 564         }
 565         sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
 566 out:
 567         gfs2_glock_dq_uninit(&sb_gh);
 568         return ret;
 569 }
 570
 571 /**
 572  * map_journal_extents - create a reusable "extent" mapping from all logical
 573  * blocks to all physical blocks for the given journal.  This will save
 574  * us time when writing journal blocks.  Most journals will have only one
 575  * extent that maps all their logical blocks.  That's because gfs2.mkfs
 576  * arranges the journal blocks sequentially to maximize performance.
 577  * So the extent would map the first block for the entire file length.
 578  * However, gfs2_jadd can happen while file activity is happening, so
 579  * those journals may not be sequential.  Less likely is the case where
 580  * the users created their own journals by mounting the metafs and
 581  * laying it out.  But it's still possible.  These journals might have
 582  * several extents.
 583  *
 584  * TODO: This should be done in bigger chunks rather than one block at a time,
 585  *       but since it's only done at mount time, I'm not worried about the
 586  *       time it takes.
 587  */
 588 static int map_journal_extents(struct gfs2_sbd *sdp)
 589 {
 590         struct gfs2_jdesc *jd = sdp->sd_jdesc;
 591         unsigned int lb;
 592         u64 db, prev_db; /* logical block, disk block, prev disk block */
 593         struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
 594         struct gfs2_journal_extent *jext = NULL;
 595         struct buffer_head bh;
 596         int rc = 0;
 597
 598         prev_db = 0;
 599
 600         for (lb = 0; lb < ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; lb++) {
 601                 bh.b_state = 0;
 602                 bh.b_blocknr = 0;
 603                 bh.b_size = 1 << ip->i_inode.i_blkbits;
 604                 rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0);
 605                 db = bh.b_blocknr;
 606                 if (rc || !db) {
 607                         printk(KERN_INFO "GFS2 journal mapping error %d: lb="
 608                                "%u db=%llu\n", rc, lb, (unsigned long long)db);
 609                         break;
 610                 }
 611                 if (!prev_db || db != prev_db + 1) {
 612                         jext = kzalloc(sizeof(struct gfs2_journal_extent),
 613                                        GFP_KERNEL);
 614                         if (!jext) {
 615                                 printk(KERN_INFO "GFS2 error: out of memory "
 616                                        "mapping journal extents.\n");
 617                                 rc = -ENOMEM;
 618                                 break;
 619                         }
 620                         jext->dblock = db;
 621                         jext->lblock = lb;
 622                         jext->blocks = 1;
 623                         list_add_tail(&jext->extent_list, &jd->extent_list);
 624                 } else {
 625                         jext->blocks++;
 626                 }
 627                 prev_db = db;
 628         }
 629         return rc;
 630 }
 631
 632 static void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp)
 633 {
 634         if (!sdp->sd_lockstruct.ls_ops->lm_others_may_mount)
 635                 return;
 636         if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
 637                 sdp->sd_lockstruct.ls_ops->lm_others_may_mount(
 638                                         sdp->sd_lockstruct.ls_lockspace);
 639 }
 640
 641 static int init_journal(struct gfs2_sbd *sdp, int undo)
 642 {
 643         struct inode *master = sdp->sd_master_dir->d_inode;
 644         struct gfs2_holder ji_gh;
 645         struct task_struct *p;
 646         struct gfs2_inode *ip;
 647         int jindex = 1;
 648         int error = 0;
 649
 650         if (undo) {
 651                 jindex = 0;
 652                 goto fail_recoverd;
 653         }
 654
 655         sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
 656         if (IS_ERR(sdp->sd_jindex)) {
 657                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 658                 return PTR_ERR(sdp->sd_jindex);
 659         }
 660         ip = GFS2_I(sdp->sd_jindex);
 661
 662         /* Load in the journal index special file */
 663
 664         error = gfs2_jindex_hold(sdp, &ji_gh);
 665         if (error) {
 666                 fs_err(sdp, "can't read journal index: %d\n", error);
 667                 goto fail;
 668         }
 669
 670         error = -EINVAL;
 671         if (!gfs2_jindex_size(sdp)) {
 672                 fs_err(sdp, "no journals!\n");
 673                 goto fail_jindex;
 674         }
 675
 676         if (sdp->sd_args.ar_spectator) {
 677                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 678                 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
 679         } else {
 680                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 681                         fs_err(sdp, "can't mount journal #%u\n",
 682                                sdp->sd_lockstruct.ls_jid);
 683                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 684                                gfs2_jindex_size(sdp),
 685                                gfs2_jindex_size(sdp) - 1);
 686                         goto fail_jindex;
 687                 }
 688                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 689
 690                 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
 691                                           &gfs2_journal_glops,
 692                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 693                                           &sdp->sd_journal_gh);
 694                 if (error) {
 695                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 696                         goto fail_jindex;
 697                 }
 698
 699                 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 700                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
 701                                            LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
 702                                            &sdp->sd_jinode_gh);
 703                 if (error) {
 704                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 705                                error);
 706                         goto fail_journal_gh;
 707                 }
 708
 709                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 710                 if (error) {
 711                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 712                                sdp->sd_jdesc->jd_jid, error);
 713                         goto fail_jinode_gh;
 714                 }
 715                 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
 716
 717                 /* Map the extents for this journal's blocks */
 718                 map_journal_extents(sdp);
 719         }
 720
 721         if (sdp->sd_lockstruct.ls_first) {
 722                 unsigned int x;
 723                 for (x = 0; x < sdp->sd_journals; x++) {
 724                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
 725                         if (error) {
 726                                 fs_err(sdp, "error recovering journal %u: %d\n",
 727                                        x, error);
 728                                 goto fail_jinode_gh;
 729                         }
 730                 }
 731
 732                 gfs2_lm_others_may_mount(sdp);
 733         } else if (!sdp->sd_args.ar_spectator) {
 734                 error = gfs2_recover_journal(sdp->sd_jdesc);
 735                 if (error) {
 736                         fs_err(sdp, "error recovering my journal: %d\n", error);
 737                         goto fail_jinode_gh;
 738                 }
 739         }
 740
 741         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 742         gfs2_glock_dq_uninit(&ji_gh);
 743         jindex = 0;
 744
 745         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 746         error = IS_ERR(p);
 747         if (error) {
 748                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 749                 goto fail_jinode_gh;
 750         }
 751         sdp->sd_recoverd_process = p;
 752
 753         return 0;
 754
 755 fail_recoverd:
 756         kthread_stop(sdp->sd_recoverd_process);
 757 fail_jinode_gh:
 758         if (!sdp->sd_args.ar_spectator)
 759                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 760 fail_journal_gh:
 761         if (!sdp->sd_args.ar_spectator)
 762                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 763 fail_jindex:
 764         gfs2_jindex_free(sdp);
 765         if (jindex)
 766                 gfs2_glock_dq_uninit(&ji_gh);
 767 fail:
 768         iput(sdp->sd_jindex);
 769         return error;
 770 }
 771
 772
 773 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 774 {
 775         int error = 0;
 776         struct gfs2_inode *ip;
 777         struct inode *master = sdp->sd_master_dir->d_inode;
 778
 779         if (undo)
 780                 goto fail_qinode;
 781
 782         error = init_journal(sdp, undo);
 783         if (error)
 784                 goto fail;
 785
 786         /* Read in the master inode number inode */
 787         sdp->sd_inum_inode = gfs2_lookup_simple(master, "inum");
 788         if (IS_ERR(sdp->sd_inum_inode)) {
 789                 error = PTR_ERR(sdp->sd_inum_inode);
 790                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 791                 goto fail_journal;
 792         }
 793
 794
 795         /* Read in the master statfs inode */
 796         sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
 797         if (IS_ERR(sdp->sd_statfs_inode)) {
 798                 error = PTR_ERR(sdp->sd_statfs_inode);
 799                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 800                 goto fail_inum;
 801         }
 802
 803         /* Read in the resource index inode */
 804         sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
 805         if (IS_ERR(sdp->sd_rindex)) {
 806                 error = PTR_ERR(sdp->sd_rindex);
 807                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 808                 goto fail_statfs;
 809         }
 810         ip = GFS2_I(sdp->sd_rindex);
 811         sdp->sd_rindex_uptodate = 0;
 812
 813         /* Read in the quota inode */
 814         sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
 815         if (IS_ERR(sdp->sd_quota_inode)) {
 816                 error = PTR_ERR(sdp->sd_quota_inode);
 817                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 818                 goto fail_rindex;
 819         }
 820         return 0;
 821
 822 fail_qinode:
 823         iput(sdp->sd_quota_inode);
 824 fail_rindex:
 825         gfs2_clear_rgrpd(sdp);
 826         iput(sdp->sd_rindex);
 827 fail_statfs:
 828         iput(sdp->sd_statfs_inode);
 829 fail_inum:
 830         iput(sdp->sd_inum_inode);
 831 fail_journal:
 832         init_journal(sdp, UNDO);
 833 fail:
 834         return error;
 835 }
 836
 837 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 838 {
 839         struct inode *pn = NULL;
 840         char buf[30];
 841         int error = 0;
 842         struct gfs2_inode *ip;
 843         struct inode *master = sdp->sd_master_dir->d_inode;
 844
 845         if (sdp->sd_args.ar_spectator)
 846                 return 0;
 847
 848         if (undo)
 849                 goto fail_qc_gh;
 850
 851         pn = gfs2_lookup_simple(master, "per_node");
 852         if (IS_ERR(pn)) {
 853                 error = PTR_ERR(pn);
 854                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 855                 return error;
 856         }
 857
 858         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 859         sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
 860         if (IS_ERR(sdp->sd_ir_inode)) {
 861                 error = PTR_ERR(sdp->sd_ir_inode);
 862                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 863                 goto fail;
 864         }
 865
 866         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 867         sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
 868         if (IS_ERR(sdp->sd_sc_inode)) {
 869                 error = PTR_ERR(sdp->sd_sc_inode);
 870                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 871                 goto fail_ir_i;
 872         }
 873
 874         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 875         sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
 876         if (IS_ERR(sdp->sd_qc_inode)) {
 877                 error = PTR_ERR(sdp->sd_qc_inode);
 878                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 879                 goto fail_ut_i;
 880         }
 881
 882         iput(pn);
 883         pn = NULL;
 884
 885         ip = GFS2_I(sdp->sd_ir_inode);
 886         error = gfs2_glock_nq_init(ip->i_gl,
 887                                    LM_ST_EXCLUSIVE, 0,
 888                                    &sdp->sd_ir_gh);
 889         if (error) {
 890                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 891                 goto fail_qc_i;
 892         }
 893
 894         ip = GFS2_I(sdp->sd_sc_inode);
 895         error = gfs2_glock_nq_init(ip->i_gl,
 896                                    LM_ST_EXCLUSIVE, 0,
 897                                    &sdp->sd_sc_gh);
 898         if (error) {
 899                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 900                 goto fail_ir_gh;
 901         }
 902
 903         ip = GFS2_I(sdp->sd_qc_inode);
 904         error = gfs2_glock_nq_init(ip->i_gl,
 905                                    LM_ST_EXCLUSIVE, 0,
 906                                    &sdp->sd_qc_gh);
 907         if (error) {
 908                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 909                 goto fail_ut_gh;
 910         }
 911
 912         return 0;
 913
 914 fail_qc_gh:
 915         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 916 fail_ut_gh:
 917         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 918 fail_ir_gh:
 919         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 920 fail_qc_i:
 921         iput(sdp->sd_qc_inode);
 922 fail_ut_i:
 923         iput(sdp->sd_sc_inode);
 924 fail_ir_i:
 925         iput(sdp->sd_ir_inode);
 926 fail:
 927         if (pn)
 928                 iput(pn);
 929         return error;
 930 }
 931
 932 static int init_threads(struct gfs2_sbd *sdp, int undo)
 933 {
 934         struct task_struct *p;
 935         int error = 0;
 936
 937         if (undo)
 938                 goto fail_quotad;
 939
 940         sdp->sd_log_flush_time = jiffies;
 941         sdp->sd_jindex_refresh_time = jiffies;
 942
 943         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 944         error = IS_ERR(p);
 945         if (error) {
 946                 fs_err(sdp, "can't start logd thread: %d\n", error);
 947                 return error;
 948         }
 949         sdp->sd_logd_process = p;
 950
 951         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 952         error = IS_ERR(p);
 953         if (error) {
 954                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 955                 goto fail;
 956         }
 957         sdp->sd_quotad_process = p;
 958
 959         return 0;
 960
 961
 962 fail_quotad:
 963         kthread_stop(sdp->sd_quotad_process);
 964 fail:
 965         kthread_stop(sdp->sd_logd_process);
 966         return error;
 967 }
 968
 969 /**
 970  * gfs2_lm_mount - mount a locking protocol
 971  * @sdp: the filesystem
 972  * @args: mount arguements
 973  * @silent: if 1, don't complain if the FS isn't a GFS2 fs
 974  *
 975  * Returns: errno
 976  */
 977
 978 static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
 979 {
 980         char *proto = sdp->sd_proto_name;
 981         char *table = sdp->sd_table_name;
 982         int flags = LM_MFLAG_CONV_NODROP;
 983         int error;
 984
 985         if (sdp->sd_args.ar_spectator)
 986                 flags |= LM_MFLAG_SPECTATOR;
 987
 988         fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
 989
 990         error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata,
 991                                      gfs2_glock_cb, sdp,
 992                                      GFS2_MIN_LVB_SIZE, flags,
 993                                      &sdp->sd_lockstruct, &sdp->sd_kobj);
 994         if (error) {
 995                 fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n",
 996                         proto, table, sdp->sd_args.ar_hostdata);
 997                 goto out;
 998         }
 999
1000         if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) ||
1001             gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >=
1002                                   GFS2_MIN_LVB_SIZE)) {
1003                 gfs2_unmount_lockproto(&sdp->sd_lockstruct);
1004                 goto out;
1005         }
1006
1007         if (sdp->sd_args.ar_spectator)
1008                 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
1009         else
1010                 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
1011                          sdp->sd_lockstruct.ls_jid);
1012
1013         fs_info(sdp, "Joined cluster. Now mounting FS...\n");
1014
1015         if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) &&
1016             !sdp->sd_args.ar_ignore_local_fs) {
1017                 sdp->sd_args.ar_localflocks = 1;
1018                 sdp->sd_args.ar_localcaching = 1;
1019         }
1020
1021 out:
1022         return error;
1023 }
1024
1025 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1026 {
1027         if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
1028                 gfs2_unmount_lockproto(&sdp->sd_lockstruct);
1029 }
1030
1031 /**
1032  * fill_super - Read in superblock
1033  * @sb: The VFS superblock
1034  * @data: Mount options
1035  * @silent: Don't complain if it's not a GFS2 filesystem
1036  *
1037  * Returns: errno
1038  */
1039
1040 static int fill_super(struct super_block *sb, void *data, int silent)
1041 {
1042         struct gfs2_sbd *sdp;
1043         struct gfs2_holder mount_gh;
1044         int error;
1045
1046         sdp = init_sbd(sb);
1047         if (!sdp) {
1048                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
1049                 return -ENOMEM;
1050         }
1051
1052         error = gfs2_mount_args(sdp, (char *)data, 0);
1053         if (error) {
1054                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
1055                 goto fail;
1056         }
1057
1058         sb->s_magic = GFS2_MAGIC;
1059         sb->s_op = &gfs2_super_ops;
1060         sb->s_export_op = &gfs2_export_ops;
1061         sb->s_time_gran = 1;
1062         sb->s_maxbytes = MAX_LFS_FILESIZE;
1063
1064         /* Set up the buffer cache and fill in some fake block size values
1065            to allow us to read-in the on-disk superblock. */
1066         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1067         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1068         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1069                                GFS2_BASIC_BLOCK_SHIFT;
1070         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
1071
1072         error = init_names(sdp, silent);
1073         if (error)
1074                 goto fail;
1075
1076         gfs2_create_debugfs_file(sdp);
1077
1078         error = gfs2_sys_fs_add(sdp);
1079         if (error)
1080                 goto fail;
1081
1082         error = gfs2_lm_mount(sdp, silent);
1083         if (error)
1084                 goto fail_sys;
1085
1086         error = init_locking(sdp, &mount_gh, DO);
1087         if (error)
1088                 goto fail_lm;
1089
1090         error = init_sb(sdp, silent);
1091         if (error)
1092                 goto fail_locking;
1093
1094         error = init_inodes(sdp, DO);
1095         if (error)
1096                 goto fail_sb;
1097
1098         error = init_per_node(sdp, DO);
1099         if (error)
1100                 goto fail_inodes;
1101
1102         error = gfs2_statfs_init(sdp);
1103         if (error) {
1104                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1105                 goto fail_per_node;
1106         }
1107
1108         error = init_threads(sdp, DO);
1109         if (error)
1110                 goto fail_per_node;
1111
1112         if (!(sb->s_flags & MS_RDONLY)) {
1113                 error = gfs2_make_fs_rw(sdp);
1114                 if (error) {
1115                         fs_err(sdp, "can't make FS RW: %d\n", error);
1116                         goto fail_threads;
1117                 }
1118         }
1119
1120         gfs2_glock_dq_uninit(&mount_gh);
1121
1122         return 0;
1123
1124 fail_threads:
1125         init_threads(sdp, UNDO);
1126 fail_per_node:
1127         init_per_node(sdp, UNDO);
1128 fail_inodes:
1129         init_inodes(sdp, UNDO);
1130 fail_sb:
1131         if (sdp->sd_root_dir)
1132                 dput(sdp->sd_root_dir);
1133         if (sdp->sd_master_dir)
1134                 dput(sdp->sd_master_dir);
1135         sb->s_root = NULL;
1136 fail_locking:
1137         init_locking(sdp, &mount_gh, UNDO);
1138 fail_lm:
1139         gfs2_gl_hash_clear(sdp);
1140         gfs2_lm_unmount(sdp);
1141         while (invalidate_inodes(sb))
1142                 yield();
1143 fail_sys:
1144         gfs2_sys_fs_del(sdp);
1145 fail:
1146         gfs2_delete_debugfs_file(sdp);
1147         kfree(sdp);
1148         sb->s_fs_info = NULL;
1149         return error;
1150 }
1151
1152 static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
1153                        const char *dev_name, void *data, struct vfsmount *mnt)
1154 {
1155         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
1156 }
1157
1158 static struct super_block *get_gfs2_sb(const char *dev_name)
1159 {
1160         struct super_block *sb;
1161         struct nameidata nd;
1162         int error;
1163
1164         error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
1165         if (error) {
1166                 printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
1167                        dev_name, error);
1168                 return NULL;
1169         }
1170         sb = nd.path.dentry->d_inode->i_sb;
1171         if (sb && (sb->s_type == &gfs2_fs_type))
1172                 atomic_inc(&sb->s_active);
1173         else
1174                 sb = NULL;
1175         path_put(&nd.path);
1176         return sb;
1177 }
1178
1179 static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
1180                             const char *dev_name, void *data, struct vfsmount *mnt)
1181 {
1182         struct super_block *sb = NULL;
1183         struct gfs2_sbd *sdp;
1184
1185         sb = get_gfs2_sb(dev_name);
1186         if (!sb) {
1187                 printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
1188                 return -ENOENT;
1189         }
1190         sdp = sb->s_fs_info;
1191         mnt->mnt_sb = sb;
1192         mnt->mnt_root = dget(sdp->sd_master_dir);
1193         return 0;
1194 }
1195
1196 static void gfs2_kill_sb(struct super_block *sb)
1197 {
1198         struct gfs2_sbd *sdp = sb->s_fs_info;
1199         if (sdp) {
1200                 gfs2_meta_syncfs(sdp);
1201                 dput(sdp->sd_root_dir);
1202                 dput(sdp->sd_master_dir);
1203                 sdp->sd_root_dir = NULL;
1204                 sdp->sd_master_dir = NULL;
1205         }
1206         shrink_dcache_sb(sb);
1207         kill_block_super(sb);
1208         if (sdp)
1209                 gfs2_delete_debugfs_file(sdp);
1210 }
1211
1212 struct file_system_type gfs2_fs_type = {
1213         .name = "gfs2",
1214         .fs_flags = FS_REQUIRES_DEV,
1215         .get_sb = gfs2_get_sb,
1216         .kill_sb = gfs2_kill_sb,
1217         .owner = THIS_MODULE,
1218 };
1219
1220 struct file_system_type gfs2meta_fs_type = {
1221         .name = "gfs2meta",
1222         .fs_flags = FS_REQUIRES_DEV,
1223         .get_sb = gfs2_get_sb_meta,
1224         .owner = THIS_MODULE,
1225 };
1226