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