fs/gfs2/ops_fstype.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2005 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 v.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/vmalloc.h>
  16 #include <linux/blkdev.h>
  17 #include <linux/kthread.h>
  18 #include <linux/gfs2_ondisk.h>
  19 #include <asm/semaphore.h>
  20
  21 #include "gfs2.h"
  22 #include "lm_interface.h"
  23 #include "incore.h"
  24 #include "daemon.h"
  25 #include "glock.h"
  26 #include "glops.h"
  27 #include "inode.h"
  28 #include "lm.h"
  29 #include "mount.h"
  30 #include "ops_export.h"
  31 #include "ops_fstype.h"
  32 #include "ops_super.h"
  33 #include "recovery.h"
  34 #include "rgrp.h"
  35 #include "super.h"
  36 #include "unlinked.h"
  37 #include "sys.h"
  38 #include "util.h"
  39
  40 #define DO 0
  41 #define UNDO 1
  42
  43 static struct gfs2_sbd *init_sbd(struct super_block *sb)
  44 {
  45         struct gfs2_sbd *sdp;
  46         unsigned int x;
  47
  48         sdp = vmalloc(sizeof(struct gfs2_sbd));
  49         if (!sdp)
  50                 return NULL;
  51
  52         memset(sdp, 0, sizeof(struct gfs2_sbd));
  53
  54         sb->s_fs_info = sdp;
  55         sdp->sd_vfs = sb;
  56
  57         gfs2_tune_init(&sdp->sd_tune);
  58
  59         for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
  60                 sdp->sd_gl_hash[x].hb_lock = RW_LOCK_UNLOCKED;
  61                 INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
  62         }
  63         INIT_LIST_HEAD(&sdp->sd_reclaim_list);
  64         spin_lock_init(&sdp->sd_reclaim_lock);
  65         init_waitqueue_head(&sdp->sd_reclaim_wq);
  66         mutex_init(&sdp->sd_invalidate_inodes_mutex);
  67
  68         mutex_init(&sdp->sd_inum_mutex);
  69         spin_lock_init(&sdp->sd_statfs_spin);
  70         mutex_init(&sdp->sd_statfs_mutex);
  71
  72         spin_lock_init(&sdp->sd_rindex_spin);
  73         mutex_init(&sdp->sd_rindex_mutex);
  74         INIT_LIST_HEAD(&sdp->sd_rindex_list);
  75         INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
  76         INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
  77
  78         INIT_LIST_HEAD(&sdp->sd_jindex_list);
  79         spin_lock_init(&sdp->sd_jindex_spin);
  80         mutex_init(&sdp->sd_jindex_mutex);
  81
  82         INIT_LIST_HEAD(&sdp->sd_unlinked_list);
  83         spin_lock_init(&sdp->sd_unlinked_spin);
  84         mutex_init(&sdp->sd_unlinked_mutex);
  85
  86         INIT_LIST_HEAD(&sdp->sd_quota_list);
  87         spin_lock_init(&sdp->sd_quota_spin);
  88         mutex_init(&sdp->sd_quota_mutex);
  89
  90         spin_lock_init(&sdp->sd_log_lock);
  91         init_waitqueue_head(&sdp->sd_log_trans_wq);
  92         init_waitqueue_head(&sdp->sd_log_flush_wq);
  93
  94         INIT_LIST_HEAD(&sdp->sd_log_le_gl);
  95         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
  96         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
  97         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
  98         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
  99
 100         mutex_init(&sdp->sd_log_reserve_mutex);
 101         INIT_LIST_HEAD(&sdp->sd_ail1_list);
 102         INIT_LIST_HEAD(&sdp->sd_ail2_list);
 103
 104         mutex_init(&sdp->sd_log_flush_lock);
 105         INIT_LIST_HEAD(&sdp->sd_log_flush_list);
 106
 107         INIT_LIST_HEAD(&sdp->sd_revoke_list);
 108
 109         mutex_init(&sdp->sd_freeze_lock);
 110
 111         return sdp;
 112 }
 113
 114 static void init_vfs(struct super_block *sb, unsigned noatime)
 115 {
 116         struct gfs2_sbd *sdp = sb->s_fs_info;
 117
 118         sb->s_magic = GFS2_MAGIC;
 119         sb->s_op = &gfs2_super_ops;
 120         sb->s_export_op = &gfs2_export_ops;
 121         sb->s_maxbytes = MAX_LFS_FILESIZE;
 122
 123         if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
 124                 set_bit(noatime, &sdp->sd_flags);
 125
 126         /* Don't let the VFS update atimes.  GFS2 handles this itself. */
 127         sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
 128 }
 129
 130 static int init_names(struct gfs2_sbd *sdp, int silent)
 131 {
 132         struct gfs2_sb *sb = NULL;
 133         char *proto, *table;
 134         int error = 0;
 135
 136         proto = sdp->sd_args.ar_lockproto;
 137         table = sdp->sd_args.ar_locktable;
 138
 139         /*  Try to autodetect  */
 140
 141         if (!proto[0] || !table[0]) {
 142                 struct buffer_head *bh;
 143                 bh = sb_getblk(sdp->sd_vfs,
 144                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 145                 lock_buffer(bh);
 146                 clear_buffer_uptodate(bh);
 147                 clear_buffer_dirty(bh);
 148                 unlock_buffer(bh);
 149                 ll_rw_block(READ, 1, &bh);
 150                 wait_on_buffer(bh);
 151
 152                 if (!buffer_uptodate(bh)) {
 153                         brelse(bh);
 154                         return -EIO;
 155                 }
 156
 157                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
 158                 if (!sb) {
 159                         brelse(bh);
 160                         return -ENOMEM;
 161                 }
 162                 gfs2_sb_in(sb, bh->b_data);
 163                 brelse(bh);
 164
 165                 error = gfs2_check_sb(sdp, sb, silent);
 166                 if (error)
 167                         goto out;
 168
 169                 if (!proto[0])
 170                         proto = sb->sb_lockproto;
 171                 if (!table[0])
 172                         table = sb->sb_locktable;
 173         }
 174
 175         if (!table[0])
 176                 table = sdp->sd_vfs->s_id;
 177
 178         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 179         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 180
 181  out:
 182         kfree(sb);
 183
 184         return error;
 185 }
 186
 187 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 188                         int undo)
 189 {
 190         struct task_struct *p;
 191         int error = 0;
 192
 193         if (undo)
 194                 goto fail_trans;
 195
 196         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
 197         error = IS_ERR(p);
 198         if (error) {
 199                 fs_err(sdp, "can't start scand thread: %d\n", error);
 200                 return error;
 201         }
 202         sdp->sd_scand_process = p;
 203
 204         for (sdp->sd_glockd_num = 0;
 205              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
 206              sdp->sd_glockd_num++) {
 207                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
 208                 error = IS_ERR(p);
 209                 if (error) {
 210                         fs_err(sdp, "can't start glockd thread: %d\n", error);
 211                         goto fail;
 212                 }
 213                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
 214         }
 215
 216         error = gfs2_glock_nq_num(sdp,
 217                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 218                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 219                                   mount_gh);
 220         if (error) {
 221                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 222                 goto fail;
 223         }
 224
 225         error = gfs2_glock_nq_num(sdp,
 226                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 227                                   LM_ST_SHARED,
 228                                   LM_FLAG_NOEXP | GL_EXACT | GL_NEVER_RECURSE,
 229                                   &sdp->sd_live_gh);
 230         if (error) {
 231                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 232                 goto fail_mount;
 233         }
 234
 235         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 236                                CREATE, &sdp->sd_rename_gl);
 237         if (error) {
 238                 fs_err(sdp, "can't create rename glock: %d\n", error);
 239                 goto fail_live;
 240         }
 241
 242         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 243                                CREATE, &sdp->sd_trans_gl);
 244         if (error) {
 245                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 246                 goto fail_rename;
 247         }
 248         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
 249
 250         return 0;
 251
 252  fail_trans:
 253         gfs2_glock_put(sdp->sd_trans_gl);
 254
 255  fail_rename:
 256         gfs2_glock_put(sdp->sd_rename_gl);
 257
 258  fail_live:
 259         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 260
 261  fail_mount:
 262         gfs2_glock_dq_uninit(mount_gh);
 263
 264  fail:
 265         while (sdp->sd_glockd_num--)
 266                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
 267
 268         kthread_stop(sdp->sd_scand_process);
 269
 270         return error;
 271 }
 272
 273 static struct inode *gfs2_lookup_root(struct gfs2_sbd *sdp,
 274                                       const struct gfs2_inum *inum)
 275 {
 276         int error;
 277         struct gfs2_glock *gl;
 278         struct gfs2_inode *ip;
 279         struct inode *inode;
 280
 281         error = gfs2_glock_get(sdp, inum->no_addr,
 282                                &gfs2_inode_glops, CREATE, &gl);
 283         if (!error) {
 284                 error = gfs2_inode_get(gl, inum, CREATE, &ip);
 285                 if (!error) {
 286                         gfs2_inode_min_init(ip, DT_DIR);
 287                         inode = gfs2_ip2v(ip);
 288                         gfs2_inode_put(ip);
 289                         gfs2_glock_put(gl);
 290                         return inode;
 291                 }
 292                 gfs2_glock_put(gl);
 293         }
 294         return ERR_PTR(error);
 295 }
 296
 297 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 298 {
 299         struct super_block *sb = sdp->sd_vfs;
 300         struct gfs2_holder sb_gh;
 301         struct gfs2_inum *inum;
 302         struct inode *inode;
 303         int error = 0;
 304
 305         if (undo) {
 306                 return 0;
 307         }
 308
 309         error = gfs2_glock_nq_num(sdp,
 310                                  GFS2_SB_LOCK, &gfs2_meta_glops,
 311                                  LM_ST_SHARED, 0, &sb_gh);
 312         if (error) {
 313                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 314                 return error;
 315         }
 316
 317         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 318         if (error) {
 319                 fs_err(sdp, "can't read superblock: %d\n", error);
 320                 goto out;
 321         }
 322
 323         /* Set up the buffer cache and SB for real */
 324         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 325                 error = -EINVAL;
 326                 fs_err(sdp, "FS block size (%u) is too small for device "
 327                        "block size (%u)\n",
 328                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 329                 goto out;
 330         }
 331         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 332                 error = -EINVAL;
 333                 fs_err(sdp, "FS block size (%u) is too big for machine "
 334                        "page size (%u)\n",
 335                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 336                 goto out;
 337         }
 338
 339         /* Get rid of buffers from the original block size */
 340         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
 341         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
 342
 343         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 344
 345         /* Get the root inode */
 346         inum = &sdp->sd_sb.sb_root_dir;
 347         if (sb->s_type == &gfs2meta_fs_type)
 348                 inum = &sdp->sd_sb.sb_master_dir;
 349         inode = gfs2_lookup_root(sdp, inum);
 350         if (IS_ERR(inode)) {
 351                 error = PTR_ERR(inode);
 352                 fs_err(sdp, "can't read in root inode: %d\n", error);
 353                 goto out;
 354         }
 355
 356         sb->s_root = d_alloc_root(inode);
 357         if (!sb->s_root) {
 358                 fs_err(sdp, "can't get root dentry\n");
 359                 error = -ENOMEM;
 360                 iput(inode);
 361         }
 362 out:
 363         gfs2_glock_dq_uninit(&sb_gh);
 364         return error;
 365 }
 366
 367 static int init_journal(struct gfs2_sbd *sdp, int undo)
 368 {
 369         struct gfs2_holder ji_gh;
 370         struct task_struct *p;
 371         struct gfs2_inode *ip;
 372         int jindex = 1;
 373         int error = 0;
 374
 375         if (undo) {
 376                 jindex = 0;
 377                 goto fail_recoverd;
 378         }
 379
 380         sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
 381         if (IS_ERR(sdp->sd_jindex)) {
 382                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 383                 return PTR_ERR(sdp->sd_jindex);
 384         }
 385         ip = sdp->sd_jindex->u.generic_ip;
 386         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 387
 388         /* Load in the journal index special file */
 389
 390         error = gfs2_jindex_hold(sdp, &ji_gh);
 391         if (error) {
 392                 fs_err(sdp, "can't read journal index: %d\n", error);
 393                 goto fail;
 394         }
 395
 396         error = -EINVAL;
 397         if (!gfs2_jindex_size(sdp)) {
 398                 fs_err(sdp, "no journals!\n");
 399                 goto fail_jindex;
 400         }
 401
 402         if (sdp->sd_args.ar_spectator) {
 403                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 404                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 405         } else {
 406                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 407                         fs_err(sdp, "can't mount journal #%u\n",
 408                                sdp->sd_lockstruct.ls_jid);
 409                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 410                                gfs2_jindex_size(sdp),
 411                                gfs2_jindex_size(sdp) - 1);
 412                         goto fail_jindex;
 413                 }
 414                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 415
 416                 error = gfs2_glock_nq_num(sdp,
 417                                           sdp->sd_lockstruct.ls_jid,
 418                                           &gfs2_journal_glops,
 419                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 420                                           &sdp->sd_journal_gh);
 421                 if (error) {
 422                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 423                         goto fail_jindex;
 424                 }
 425
 426                 ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
 427                 error = gfs2_glock_nq_init(ip->i_gl,
 428                                            LM_ST_SHARED,
 429                                            LM_FLAG_NOEXP | GL_EXACT,
 430                                            &sdp->sd_jinode_gh);
 431                 if (error) {
 432                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 433                                error);
 434                         goto fail_journal_gh;
 435                 }
 436
 437                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 438                 if (error) {
 439                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 440                                sdp->sd_jdesc->jd_jid, error);
 441                         goto fail_jinode_gh;
 442                 }
 443                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 444         }
 445
 446         if (sdp->sd_lockstruct.ls_first) {
 447                 unsigned int x;
 448                 for (x = 0; x < sdp->sd_journals; x++) {
 449                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
 450                                                      WAIT);
 451                         if (error) {
 452                                 fs_err(sdp, "error recovering journal %u: %d\n",
 453                                        x, error);
 454                                 goto fail_jinode_gh;
 455                         }
 456                 }
 457
 458                 gfs2_lm_others_may_mount(sdp);
 459         } else if (!sdp->sd_args.ar_spectator) {
 460                 error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
 461                 if (error) {
 462                         fs_err(sdp, "error recovering my journal: %d\n", error);
 463                         goto fail_jinode_gh;
 464                 }
 465         }
 466
 467         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 468         gfs2_glock_dq_uninit(&ji_gh);
 469         jindex = 0;
 470
 471         /* Disown my Journal glock */
 472
 473         sdp->sd_journal_gh.gh_owner = NULL;
 474         sdp->sd_jinode_gh.gh_owner = NULL;
 475
 476         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 477         error = IS_ERR(p);
 478         if (error) {
 479                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 480                 goto fail_jinode_gh;
 481         }
 482         sdp->sd_recoverd_process = p;
 483
 484         return 0;
 485
 486  fail_recoverd:
 487         kthread_stop(sdp->sd_recoverd_process);
 488
 489  fail_jinode_gh:
 490         if (!sdp->sd_args.ar_spectator)
 491                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 492
 493  fail_journal_gh:
 494         if (!sdp->sd_args.ar_spectator)
 495                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 496
 497  fail_jindex:
 498         gfs2_jindex_free(sdp);
 499         if (jindex)
 500                 gfs2_glock_dq_uninit(&ji_gh);
 501
 502  fail:
 503         iput(sdp->sd_jindex);
 504
 505         return error;
 506 }
 507
 508
 509 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 510 {
 511         int error = 0;
 512         struct gfs2_inode *ip;
 513         struct inode *inode;
 514
 515         if (undo)
 516                 goto fail_qinode;
 517
 518         inode = gfs2_lookup_root(sdp, &sdp->sd_sb.sb_master_dir);
 519         if (IS_ERR(inode)) {
 520                 error = PTR_ERR(inode);
 521                 fs_err(sdp, "can't read in master directory: %d\n", error);
 522                 goto fail;
 523         }
 524         sdp->sd_master_dir = inode;
 525
 526         error = init_journal(sdp, undo);
 527         if (error)
 528                 goto fail_master;
 529
 530         /* Read in the master inode number inode */
 531         sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
 532         if (IS_ERR(sdp->sd_inum_inode)) {
 533                 error = PTR_ERR(sdp->sd_inum_inode);
 534                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 535                 goto fail_journal;
 536         }
 537
 538
 539         /* Read in the master statfs inode */
 540         sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
 541         if (IS_ERR(sdp->sd_statfs_inode)) {
 542                 error = PTR_ERR(sdp->sd_statfs_inode);
 543                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 544                 goto fail_inum;
 545         }
 546
 547         /* Read in the resource index inode */
 548         sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
 549         if (IS_ERR(sdp->sd_rindex)) {
 550                 error = PTR_ERR(sdp->sd_rindex);
 551                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 552                 goto fail_statfs;
 553         }
 554         ip = sdp->sd_rindex->u.generic_ip;
 555         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 556         sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
 557
 558         /* Read in the quota inode */
 559         sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
 560         if (IS_ERR(sdp->sd_quota_inode)) {
 561                 error = PTR_ERR(sdp->sd_quota_inode);
 562                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 563                 goto fail_rindex;
 564         }
 565         return 0;
 566
 567 fail_qinode:
 568         iput(sdp->sd_quota_inode);
 569
 570 fail_rindex:
 571         gfs2_clear_rgrpd(sdp);
 572         iput(sdp->sd_rindex);
 573
 574 fail_statfs:
 575         iput(sdp->sd_statfs_inode);
 576
 577 fail_inum:
 578         iput(sdp->sd_inum_inode);
 579 fail_journal:
 580         init_journal(sdp, UNDO);
 581 fail_master:
 582         iput(sdp->sd_master_dir);
 583 fail:
 584         return error;
 585 }
 586
 587 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 588 {
 589         struct inode *pn = NULL;
 590         char buf[30];
 591         int error = 0;
 592         struct gfs2_inode *ip;
 593
 594         if (sdp->sd_args.ar_spectator)
 595                 return 0;
 596
 597         if (undo)
 598                 goto fail_qc_gh;
 599
 600         pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
 601         if (IS_ERR(pn)) {
 602                 error = PTR_ERR(pn);
 603                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 604                 return error;
 605         }
 606
 607         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 608         sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
 609         if (IS_ERR(sdp->sd_ir_inode)) {
 610                 error = PTR_ERR(sdp->sd_ir_inode);
 611                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 612                 goto fail;
 613         }
 614
 615         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 616         sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
 617         if (IS_ERR(sdp->sd_sc_inode)) {
 618                 error = PTR_ERR(sdp->sd_sc_inode);
 619                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 620                 goto fail_ir_i;
 621         }
 622
 623         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 624         sdp->sd_ut_inode = gfs2_lookup_simple(pn, buf);
 625         if (IS_ERR(sdp->sd_ut_inode)) {
 626                 error = PTR_ERR(sdp->sd_ut_inode);
 627                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 628                 goto fail_sc_i;
 629         }
 630
 631         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 632         sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
 633         if (IS_ERR(sdp->sd_qc_inode)) {
 634                 error = PTR_ERR(sdp->sd_qc_inode);
 635                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 636                 goto fail_ut_i;
 637         }
 638
 639         iput(pn);
 640         pn = NULL;
 641
 642         ip = sdp->sd_ir_inode->u.generic_ip;
 643         error = gfs2_glock_nq_init(ip->i_gl,
 644                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 645                                    &sdp->sd_ir_gh);
 646         if (error) {
 647                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 648                 goto fail_qc_i;
 649         }
 650
 651         ip = sdp->sd_sc_inode->u.generic_ip;
 652         error = gfs2_glock_nq_init(ip->i_gl,
 653                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 654                                    &sdp->sd_sc_gh);
 655         if (error) {
 656                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 657                 goto fail_ir_gh;
 658         }
 659
 660         ip = sdp->sd_ut_inode->u.generic_ip;
 661         error = gfs2_glock_nq_init(ip->i_gl,
 662                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 663                                    &sdp->sd_ut_gh);
 664         if (error) {
 665                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 666                 goto fail_sc_gh;
 667         }
 668
 669         ip = sdp->sd_qc_inode->u.generic_ip;
 670         error = gfs2_glock_nq_init(ip->i_gl,
 671                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 672                                    &sdp->sd_qc_gh);
 673         if (error) {
 674                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 675                 goto fail_ut_gh;
 676         }
 677
 678         return 0;
 679
 680  fail_qc_gh:
 681         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 682
 683  fail_ut_gh:
 684         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 685
 686  fail_sc_gh:
 687         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 688
 689  fail_ir_gh:
 690         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 691
 692  fail_qc_i:
 693         iput(sdp->sd_qc_inode);
 694
 695  fail_ut_i:
 696         iput(sdp->sd_ut_inode);
 697
 698  fail_sc_i:
 699         iput(sdp->sd_sc_inode);
 700
 701  fail_ir_i:
 702         iput(sdp->sd_ir_inode);
 703
 704  fail:
 705         if (pn)
 706                 iput(pn);
 707         return error;
 708 }
 709
 710 static int init_threads(struct gfs2_sbd *sdp, int undo)
 711 {
 712         struct task_struct *p;
 713         int error = 0;
 714
 715         if (undo)
 716                 goto fail_inoded;
 717
 718         sdp->sd_log_flush_time = jiffies;
 719         sdp->sd_jindex_refresh_time = jiffies;
 720
 721         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 722         error = IS_ERR(p);
 723         if (error) {
 724                 fs_err(sdp, "can't start logd thread: %d\n", error);
 725                 return error;
 726         }
 727         sdp->sd_logd_process = p;
 728
 729         sdp->sd_statfs_sync_time = jiffies;
 730         sdp->sd_quota_sync_time = jiffies;
 731
 732         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 733         error = IS_ERR(p);
 734         if (error) {
 735                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 736                 goto fail;
 737         }
 738         sdp->sd_quotad_process = p;
 739
 740         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 741         error = IS_ERR(p);
 742         if (error) {
 743                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 744                 goto fail_quotad;
 745         }
 746         sdp->sd_inoded_process = p;
 747
 748         return 0;
 749
 750  fail_inoded:
 751         kthread_stop(sdp->sd_inoded_process);
 752
 753  fail_quotad:
 754         kthread_stop(sdp->sd_quotad_process);
 755
 756  fail:
 757         kthread_stop(sdp->sd_logd_process);
 758
 759         return error;
 760 }
 761
 762 /**
 763  * fill_super - Read in superblock
 764  * @sb: The VFS superblock
 765  * @data: Mount options
 766  * @silent: Don't complain if it's not a GFS2 filesystem
 767  *
 768  * Returns: errno
 769  */
 770
 771 static int fill_super(struct super_block *sb, void *data, int silent)
 772 {
 773         struct gfs2_sbd *sdp;
 774         struct gfs2_holder mount_gh;
 775         int error;
 776
 777         sdp = init_sbd(sb);
 778         if (!sdp) {
 779                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 780                 return -ENOMEM;
 781         }
 782
 783         error = gfs2_mount_args(sdp, (char *)data, 0);
 784         if (error) {
 785                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 786                 goto fail;
 787         }
 788
 789         init_vfs(sb, SDF_NOATIME);
 790
 791         /* Set up the buffer cache and fill in some fake block size values
 792            to allow us to read-in the on-disk superblock. */
 793         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
 794         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
 795         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 796                                GFS2_BASIC_BLOCK_SHIFT;
 797         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 798
 799         error = init_names(sdp, silent);
 800         if (error)
 801                 goto fail;
 802
 803         error = gfs2_sys_fs_add(sdp);
 804         if (error)
 805                 goto fail;
 806
 807         error = gfs2_lm_mount(sdp, silent);
 808         if (error)
 809                 goto fail_sys;
 810
 811         error = init_locking(sdp, &mount_gh, DO);
 812         if (error)
 813                 goto fail_lm;
 814
 815         error = init_sb(sdp, silent, DO);
 816         if (error)
 817                 goto fail_locking;
 818
 819         error = init_inodes(sdp, DO);
 820         if (error)
 821                 goto fail_sb;
 822
 823         error = init_per_node(sdp, DO);
 824         if (error)
 825                 goto fail_inodes;
 826
 827         error = gfs2_statfs_init(sdp);
 828         if (error) {
 829                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 830                 goto fail_per_node;
 831         }
 832
 833         error = init_threads(sdp, DO);
 834         if (error)
 835                 goto fail_per_node;
 836
 837         if (!(sb->s_flags & MS_RDONLY)) {
 838                 error = gfs2_make_fs_rw(sdp);
 839                 if (error) {
 840                         fs_err(sdp, "can't make FS RW: %d\n", error);
 841                         goto fail_threads;
 842                 }
 843         }
 844
 845         gfs2_glock_dq_uninit(&mount_gh);
 846
 847         return 0;
 848
 849  fail_threads:
 850         init_threads(sdp, UNDO);
 851
 852  fail_per_node:
 853         init_per_node(sdp, UNDO);
 854
 855  fail_inodes:
 856         init_inodes(sdp, UNDO);
 857
 858  fail_sb:
 859         init_sb(sdp, 0, UNDO);
 860
 861  fail_locking:
 862         init_locking(sdp, &mount_gh, UNDO);
 863
 864  fail_lm:
 865         gfs2_gl_hash_clear(sdp, WAIT);
 866         gfs2_lm_unmount(sdp);
 867         while (invalidate_inodes(sb))
 868                 yield();
 869
 870  fail_sys:
 871         gfs2_sys_fs_del(sdp);
 872
 873  fail:
 874         vfree(sdp);
 875         sb->s_fs_info = NULL;
 876
 877         return error;
 878 }
 879
 880 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 881                                        int flags, const char *dev_name,
 882                                        void *data)
 883 {
 884         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 885 }
 886
 887 static void gfs2_kill_sb(struct super_block *sb)
 888 {
 889         kill_block_super(sb);
 890 }
 891
 892 struct file_system_type gfs2_fs_type = {
 893         .name = "gfs2",
 894         .fs_flags = FS_REQUIRES_DEV,
 895         .get_sb = gfs2_get_sb,
 896         .kill_sb = gfs2_kill_sb,
 897         .owner = THIS_MODULE,
 898 };
 899
 900 struct file_system_type gfs2meta_fs_type = {
 901         .name = "gfs2meta",
 902         .fs_flags = FS_REQUIRES_DEV,
 903         .get_sb = gfs2_get_sb,
 904         .kill_sb = gfs2_kill_sb,
 905         .owner = THIS_MODULE,
 906 };
 907