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         sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
 383         if (IS_ERR(sdp->sd_jindex)) {
 384                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 385                 return PTR_ERR(sdp->sd_jindex);
 386         }
 387         ip = sdp->sd_jindex->u.generic_ip;
 388         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 389
 390         /* Load in the journal index special file */
 391
 392         error = gfs2_jindex_hold(sdp, &ji_gh);
 393         if (error) {
 394                 fs_err(sdp, "can't read journal index: %d\n", error);
 395                 goto fail;
 396         }
 397
 398         error = -EINVAL;
 399         if (!gfs2_jindex_size(sdp)) {
 400                 fs_err(sdp, "no journals!\n");
 401                 goto fail_jindex;
 402         }
 403
 404         if (sdp->sd_args.ar_spectator) {
 405                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 406                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 407         } else {
 408                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 409                         fs_err(sdp, "can't mount journal #%u\n",
 410                                sdp->sd_lockstruct.ls_jid);
 411                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 412                                gfs2_jindex_size(sdp),
 413                                gfs2_jindex_size(sdp) - 1);
 414                         goto fail_jindex;
 415                 }
 416                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 417
 418                 error = gfs2_glock_nq_num(sdp,
 419                                           sdp->sd_lockstruct.ls_jid,
 420                                           &gfs2_journal_glops,
 421                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 422                                           &sdp->sd_journal_gh);
 423                 if (error) {
 424                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 425                         goto fail_jindex;
 426                 }
 427
 428                 ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
 429                 error = gfs2_glock_nq_init(ip->i_gl,
 430                                            LM_ST_SHARED,
 431                                            LM_FLAG_NOEXP | GL_EXACT,
 432                                            &sdp->sd_jinode_gh);
 433                 if (error) {
 434                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 435                                error);
 436                         goto fail_journal_gh;
 437                 }
 438
 439                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 440                 if (error) {
 441                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 442                                sdp->sd_jdesc->jd_jid, error);
 443                         goto fail_jinode_gh;
 444                 }
 445                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 446         }
 447
 448         if (sdp->sd_lockstruct.ls_first) {
 449                 unsigned int x;
 450                 for (x = 0; x < sdp->sd_journals; x++) {
 451                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
 452                                                      WAIT);
 453                         if (error) {
 454                                 fs_err(sdp, "error recovering journal %u: %d\n",
 455                                        x, error);
 456                                 goto fail_jinode_gh;
 457                         }
 458                 }
 459
 460                 gfs2_lm_others_may_mount(sdp);
 461         } else if (!sdp->sd_args.ar_spectator) {
 462                 error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
 463                 if (error) {
 464                         fs_err(sdp, "error recovering my journal: %d\n", error);
 465                         goto fail_jinode_gh;
 466                 }
 467         }
 468
 469         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 470         gfs2_glock_dq_uninit(&ji_gh);
 471         jindex = 0;
 472
 473         /* Disown my Journal glock */
 474
 475         sdp->sd_journal_gh.gh_owner = NULL;
 476         sdp->sd_jinode_gh.gh_owner = NULL;
 477
 478         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 479         error = IS_ERR(p);
 480         if (error) {
 481                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 482                 goto fail_jinode_gh;
 483         }
 484         sdp->sd_recoverd_process = p;
 485
 486         return 0;
 487
 488  fail_recoverd:
 489         kthread_stop(sdp->sd_recoverd_process);
 490
 491  fail_jinode_gh:
 492         if (!sdp->sd_args.ar_spectator)
 493                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 494
 495  fail_journal_gh:
 496         if (!sdp->sd_args.ar_spectator)
 497                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 498
 499  fail_jindex:
 500         gfs2_jindex_free(sdp);
 501         if (jindex)
 502                 gfs2_glock_dq_uninit(&ji_gh);
 503
 504  fail:
 505         iput(sdp->sd_jindex);
 506
 507         return error;
 508 }
 509
 510
 511 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 512 {
 513         int error = 0;
 514         struct gfs2_inode *ip;
 515         struct inode *inode;
 516
 517         if (undo)
 518                 goto fail_qinode;
 519
 520         inode = gfs2_lookup_root(sdp, &sdp->sd_sb.sb_master_dir);
 521         if (IS_ERR(inode)) {
 522                 error = PTR_ERR(inode);
 523                 fs_err(sdp, "can't read in master directory: %d\n", error);
 524                 goto fail;
 525         }
 526         sdp->sd_master_dir = inode;
 527
 528         error = init_journal(sdp, undo);
 529         if (error)
 530                 goto fail_master;
 531
 532         /* Read in the master inode number inode */
 533         sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
 534         if (IS_ERR(sdp->sd_inum_inode)) {
 535                 error = PTR_ERR(sdp->sd_inum_inode);
 536                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 537                 goto fail_journal;
 538         }
 539
 540
 541         /* Read in the master statfs inode */
 542         sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
 543         if (IS_ERR(sdp->sd_statfs_inode)) {
 544                 error = PTR_ERR(sdp->sd_statfs_inode);
 545                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 546                 goto fail_inum;
 547         }
 548
 549         /* Read in the resource index inode */
 550         sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
 551         if (IS_ERR(sdp->sd_rindex)) {
 552                 error = PTR_ERR(sdp->sd_rindex);
 553                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 554                 goto fail_statfs;
 555         }
 556         ip = sdp->sd_rindex->u.generic_ip;
 557         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 558         sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
 559
 560         /* Read in the quota inode */
 561         sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
 562         if (IS_ERR(sdp->sd_quota_inode)) {
 563                 error = PTR_ERR(sdp->sd_quota_inode);
 564                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 565                 goto fail_rindex;
 566         }
 567         return 0;
 568
 569 fail_qinode:
 570         iput(sdp->sd_quota_inode);
 571
 572 fail_rindex:
 573         gfs2_clear_rgrpd(sdp);
 574         iput(sdp->sd_rindex);
 575
 576 fail_statfs:
 577         iput(sdp->sd_statfs_inode);
 578
 579 fail_inum:
 580         iput(sdp->sd_inum_inode);
 581 fail_journal:
 582         init_journal(sdp, UNDO);
 583 fail_master:
 584         iput(sdp->sd_master_dir);
 585 fail:
 586         return error;
 587 }
 588
 589 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 590 {
 591         struct inode *pn = NULL;
 592         char buf[30];
 593         int error = 0;
 594         struct gfs2_inode *ip;
 595
 596         if (sdp->sd_args.ar_spectator)
 597                 return 0;
 598
 599         if (undo)
 600                 goto fail_qc_gh;
 601
 602         pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
 603         if (IS_ERR(pn)) {
 604                 error = PTR_ERR(pn);
 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         sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
 611         if (IS_ERR(sdp->sd_ir_inode)) {
 612                 error = PTR_ERR(sdp->sd_ir_inode);
 613                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 614                 goto fail;
 615         }
 616
 617         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 618         sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
 619         if (IS_ERR(sdp->sd_sc_inode)) {
 620                 error = PTR_ERR(sdp->sd_sc_inode);
 621                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 622                 goto fail_ir_i;
 623         }
 624
 625         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 626         sdp->sd_ut_inode = gfs2_lookup_simple(pn, buf);
 627         if (IS_ERR(sdp->sd_ut_inode)) {
 628                 error = PTR_ERR(sdp->sd_ut_inode);
 629                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 630                 goto fail_sc_i;
 631         }
 632
 633         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 634         sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
 635         if (IS_ERR(sdp->sd_qc_inode)) {
 636                 error = PTR_ERR(sdp->sd_qc_inode);
 637                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 638                 goto fail_ut_i;
 639         }
 640
 641         iput(pn);
 642         pn = NULL;
 643
 644         ip = sdp->sd_ir_inode->u.generic_ip;
 645         error = gfs2_glock_nq_init(ip->i_gl,
 646                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 647                                    &sdp->sd_ir_gh);
 648         if (error) {
 649                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 650                 goto fail_qc_i;
 651         }
 652
 653         ip = sdp->sd_sc_inode->u.generic_ip;
 654         error = gfs2_glock_nq_init(ip->i_gl,
 655                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 656                                    &sdp->sd_sc_gh);
 657         if (error) {
 658                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 659                 goto fail_ir_gh;
 660         }
 661
 662         ip = sdp->sd_ut_inode->u.generic_ip;
 663         error = gfs2_glock_nq_init(ip->i_gl,
 664                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 665                                    &sdp->sd_ut_gh);
 666         if (error) {
 667                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 668                 goto fail_sc_gh;
 669         }
 670
 671         ip = sdp->sd_qc_inode->u.generic_ip;
 672         error = gfs2_glock_nq_init(ip->i_gl,
 673                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 674                                    &sdp->sd_qc_gh);
 675         if (error) {
 676                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 677                 goto fail_ut_gh;
 678         }
 679
 680         return 0;
 681
 682  fail_qc_gh:
 683         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 684
 685  fail_ut_gh:
 686         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 687
 688  fail_sc_gh:
 689         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 690
 691  fail_ir_gh:
 692         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 693
 694  fail_qc_i:
 695         iput(sdp->sd_qc_inode);
 696
 697  fail_ut_i:
 698         iput(sdp->sd_ut_inode);
 699
 700  fail_sc_i:
 701         iput(sdp->sd_sc_inode);
 702
 703  fail_ir_i:
 704         iput(sdp->sd_ir_inode);
 705
 706  fail:
 707         if (pn)
 708                 iput(pn);
 709         return error;
 710 }
 711
 712 static int init_threads(struct gfs2_sbd *sdp, int undo)
 713 {
 714         struct task_struct *p;
 715         int error = 0;
 716
 717         if (undo)
 718                 goto fail_inoded;
 719
 720         sdp->sd_log_flush_time = jiffies;
 721         sdp->sd_jindex_refresh_time = jiffies;
 722
 723         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 724         error = IS_ERR(p);
 725         if (error) {
 726                 fs_err(sdp, "can't start logd thread: %d\n", error);
 727                 return error;
 728         }
 729         sdp->sd_logd_process = p;
 730
 731         sdp->sd_statfs_sync_time = jiffies;
 732         sdp->sd_quota_sync_time = jiffies;
 733
 734         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 735         error = IS_ERR(p);
 736         if (error) {
 737                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 738                 goto fail;
 739         }
 740         sdp->sd_quotad_process = p;
 741
 742         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 743         error = IS_ERR(p);
 744         if (error) {
 745                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 746                 goto fail_quotad;
 747         }
 748         sdp->sd_inoded_process = p;
 749
 750         return 0;
 751
 752  fail_inoded:
 753         kthread_stop(sdp->sd_inoded_process);
 754
 755  fail_quotad:
 756         kthread_stop(sdp->sd_quotad_process);
 757
 758  fail:
 759         kthread_stop(sdp->sd_logd_process);
 760
 761         return error;
 762 }
 763
 764 /**
 765  * fill_super - Read in superblock
 766  * @sb: The VFS superblock
 767  * @data: Mount options
 768  * @silent: Don't complain if it's not a GFS2 filesystem
 769  *
 770  * Returns: errno
 771  */
 772
 773 static int fill_super(struct super_block *sb, void *data, int silent)
 774 {
 775         struct gfs2_sbd *sdp;
 776         struct gfs2_holder mount_gh;
 777         int error;
 778
 779         sdp = init_sbd(sb);
 780         if (!sdp) {
 781                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 782                 return -ENOMEM;
 783         }
 784
 785         error = gfs2_mount_args(sdp, (char *)data, 0);
 786         if (error) {
 787                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 788                 goto fail;
 789         }
 790
 791         init_vfs(sb, SDF_NOATIME);
 792
 793         /* Set up the buffer cache and fill in some fake block size values
 794            to allow us to read-in the on-disk superblock. */
 795         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
 796         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
 797         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 798                                GFS2_BASIC_BLOCK_SHIFT;
 799         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 800
 801         error = init_names(sdp, silent);
 802         if (error)
 803                 goto fail;
 804
 805         error = gfs2_sys_fs_add(sdp);
 806         if (error)
 807                 goto fail;
 808
 809         error = gfs2_lm_mount(sdp, silent);
 810         if (error)
 811                 goto fail_sys;
 812
 813         error = init_locking(sdp, &mount_gh, DO);
 814         if (error)
 815                 goto fail_lm;
 816
 817         error = init_sb(sdp, silent, DO);
 818         if (error)
 819                 goto fail_locking;
 820
 821         error = init_inodes(sdp, DO);
 822         if (error)
 823                 goto fail_sb;
 824
 825         error = init_per_node(sdp, DO);
 826         if (error)
 827                 goto fail_inodes;
 828
 829         error = gfs2_statfs_init(sdp);
 830         if (error) {
 831                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 832                 goto fail_per_node;
 833         }
 834
 835         error = init_threads(sdp, DO);
 836         if (error)
 837                 goto fail_per_node;
 838
 839         if (!(sb->s_flags & MS_RDONLY)) {
 840                 error = gfs2_make_fs_rw(sdp);
 841                 if (error) {
 842                         fs_err(sdp, "can't make FS RW: %d\n", error);
 843                         goto fail_threads;
 844                 }
 845         }
 846
 847         gfs2_glock_dq_uninit(&mount_gh);
 848
 849         return 0;
 850
 851  fail_threads:
 852         init_threads(sdp, UNDO);
 853
 854  fail_per_node:
 855         init_per_node(sdp, UNDO);
 856
 857  fail_inodes:
 858         init_inodes(sdp, UNDO);
 859
 860  fail_sb:
 861         init_sb(sdp, 0, UNDO);
 862
 863  fail_locking:
 864         init_locking(sdp, &mount_gh, UNDO);
 865
 866  fail_lm:
 867         gfs2_gl_hash_clear(sdp, WAIT);
 868         gfs2_lm_unmount(sdp);
 869         while (invalidate_inodes(sb))
 870                 yield();
 871
 872  fail_sys:
 873         gfs2_sys_fs_del(sdp);
 874
 875  fail:
 876         vfree(sdp);
 877         sb->s_fs_info = NULL;
 878
 879         return error;
 880 }
 881
 882 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 883                                        int flags, const char *dev_name,
 884                                        void *data)
 885 {
 886         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 887 }
 888
 889 static void gfs2_kill_sb(struct super_block *sb)
 890 {
 891         kill_block_super(sb);
 892 }
 893
 894 struct file_system_type gfs2_fs_type = {
 895         .name = "gfs2",
 896         .fs_flags = FS_REQUIRES_DEV,
 897         .get_sb = gfs2_get_sb,
 898         .kill_sb = gfs2_kill_sb,
 899         .owner = THIS_MODULE,
 900 };
 901
 902 struct file_system_type gfs2meta_fs_type = {
 903         .name = "gfs2meta",
 904         .fs_flags = FS_REQUIRES_DEV,
 905         .get_sb = gfs2_get_sb,
 906         .kill_sb = gfs2_kill_sb,
 907         .owner = THIS_MODULE,
 908 };
 909