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 <asm/semaphore.h>
  19
  20 #include "gfs2.h"
  21 #include "daemon.h"
  22 #include "glock.h"
  23 #include "glops.h"
  24 #include "inode.h"
  25 #include "lm.h"
  26 #include "mount.h"
  27 #include "ops_export.h"
  28 #include "ops_fstype.h"
  29 #include "ops_super.h"
  30 #include "recovery.h"
  31 #include "rgrp.h"
  32 #include "super.h"
  33 #include "unlinked.h"
  34 #include "sys.h"
  35
  36 #define DO 0
  37 #define UNDO 1
  38
  39 static struct gfs2_sbd *init_sbd(struct super_block *sb)
  40 {
  41         struct gfs2_sbd *sdp;
  42         unsigned int x;
  43
  44         sdp = vmalloc(sizeof(struct gfs2_sbd));
  45         if (!sdp)
  46                 return NULL;
  47
  48         memset(sdp, 0, sizeof(struct gfs2_sbd));
  49
  50         set_v2sdp(sb, sdp);
  51         sdp->sd_vfs = sb;
  52
  53         gfs2_tune_init(&sdp->sd_tune);
  54
  55         for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
  56                 sdp->sd_gl_hash[x].hb_lock = RW_LOCK_UNLOCKED;
  57                 INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
  58         }
  59         INIT_LIST_HEAD(&sdp->sd_reclaim_list);
  60         spin_lock_init(&sdp->sd_reclaim_lock);
  61         init_waitqueue_head(&sdp->sd_reclaim_wq);
  62         mutex_init(&sdp->sd_invalidate_inodes_mutex);
  63
  64         mutex_init(&sdp->sd_inum_mutex);
  65         spin_lock_init(&sdp->sd_statfs_spin);
  66         mutex_init(&sdp->sd_statfs_mutex);
  67
  68         spin_lock_init(&sdp->sd_rindex_spin);
  69         mutex_init(&sdp->sd_rindex_mutex);
  70         INIT_LIST_HEAD(&sdp->sd_rindex_list);
  71         INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
  72         INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
  73
  74         INIT_LIST_HEAD(&sdp->sd_jindex_list);
  75         spin_lock_init(&sdp->sd_jindex_spin);
  76         mutex_init(&sdp->sd_jindex_mutex);
  77
  78         INIT_LIST_HEAD(&sdp->sd_unlinked_list);
  79         spin_lock_init(&sdp->sd_unlinked_spin);
  80         mutex_init(&sdp->sd_unlinked_mutex);
  81
  82         INIT_LIST_HEAD(&sdp->sd_quota_list);
  83         spin_lock_init(&sdp->sd_quota_spin);
  84         mutex_init(&sdp->sd_quota_mutex);
  85
  86         spin_lock_init(&sdp->sd_log_lock);
  87         init_waitqueue_head(&sdp->sd_log_trans_wq);
  88         init_waitqueue_head(&sdp->sd_log_flush_wq);
  89
  90         INIT_LIST_HEAD(&sdp->sd_log_le_gl);
  91         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
  92         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
  93         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
  94         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
  95
  96         INIT_LIST_HEAD(&sdp->sd_log_blks_list);
  97         init_waitqueue_head(&sdp->sd_log_blks_wait);
  98
  99         INIT_LIST_HEAD(&sdp->sd_ail1_list);
 100         INIT_LIST_HEAD(&sdp->sd_ail2_list);
 101
 102         mutex_init(&sdp->sd_log_flush_lock);
 103         INIT_LIST_HEAD(&sdp->sd_log_flush_list);
 104
 105         INIT_LIST_HEAD(&sdp->sd_revoke_list);
 106
 107         mutex_init(&sdp->sd_freeze_lock);
 108
 109         return sdp;
 110 }
 111
 112 static void init_vfs(struct gfs2_sbd *sdp)
 113 {
 114         struct super_block *sb = sdp->sd_vfs;
 115
 116         sb->s_magic = GFS2_MAGIC;
 117         sb->s_op = &gfs2_super_ops;
 118         sb->s_export_op = &gfs2_export_ops;
 119         sb->s_maxbytes = MAX_LFS_FILESIZE;
 120
 121         if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
 122                 set_bit(SDF_NOATIME, &sdp->sd_flags);
 123
 124         /* Don't let the VFS update atimes.  GFS2 handles this itself. */
 125         sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
 126
 127         /* Set up the buffer cache and fill in some fake block size values
 128            to allow us to read-in the on-disk superblock. */
 129         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
 130         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
 131         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 132                                GFS2_BASIC_BLOCK_SHIFT;
 133         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 134 }
 135
 136 static int init_names(struct gfs2_sbd *sdp, int silent)
 137 {
 138         struct gfs2_sb *sb = NULL;
 139         char *proto, *table;
 140         int error = 0;
 141
 142         proto = sdp->sd_args.ar_lockproto;
 143         table = sdp->sd_args.ar_locktable;
 144
 145         /*  Try to autodetect  */
 146
 147         if (!proto[0] || !table[0]) {
 148                 struct buffer_head *bh;
 149                 bh = sb_getblk(sdp->sd_vfs,
 150                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 151                 lock_buffer(bh);
 152                 clear_buffer_uptodate(bh);
 153                 clear_buffer_dirty(bh);
 154                 unlock_buffer(bh);
 155                 ll_rw_block(READ, 1, &bh);
 156                 wait_on_buffer(bh);
 157
 158                 if (!buffer_uptodate(bh)) {
 159                         brelse(bh);
 160                         return -EIO;
 161                 }
 162
 163                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
 164                 if (!sb) {
 165                         brelse(bh);
 166                         return -ENOMEM;
 167                 }
 168                 gfs2_sb_in(sb, bh->b_data);
 169                 brelse(bh);
 170
 171                 error = gfs2_check_sb(sdp, sb, silent);
 172                 if (error)
 173                         goto out;
 174
 175                 if (!proto[0])
 176                         proto = sb->sb_lockproto;
 177                 if (!table[0])
 178                         table = sb->sb_locktable;
 179         }
 180
 181         if (!table[0])
 182                 table = sdp->sd_vfs->s_id;
 183
 184         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 185         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 186
 187  out:
 188         kfree(sb);
 189
 190         return error;
 191 }
 192
 193 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 194                         int undo)
 195 {
 196         struct task_struct *p;
 197         int error = 0;
 198
 199         if (undo)
 200                 goto fail_trans;
 201
 202         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
 203         error = IS_ERR(p);
 204         if (error) {
 205                 fs_err(sdp, "can't start scand thread: %d\n", error);
 206                 return error;
 207         }
 208         sdp->sd_scand_process = p;
 209
 210         for (sdp->sd_glockd_num = 0;
 211              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
 212              sdp->sd_glockd_num++) {
 213                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
 214                 error = IS_ERR(p);
 215                 if (error) {
 216                         fs_err(sdp, "can't start glockd thread: %d\n", error);
 217                         goto fail;
 218                 }
 219                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
 220         }
 221
 222         error = gfs2_glock_nq_num(sdp,
 223                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 224                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 225                                   mount_gh);
 226         if (error) {
 227                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 228                 goto fail;
 229         }
 230
 231         error = gfs2_glock_nq_num(sdp,
 232                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 233                                   LM_ST_SHARED,
 234                                   LM_FLAG_NOEXP | GL_EXACT | GL_NEVER_RECURSE,
 235                                   &sdp->sd_live_gh);
 236         if (error) {
 237                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 238                 goto fail_mount;
 239         }
 240
 241         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 242                                CREATE, &sdp->sd_rename_gl);
 243         if (error) {
 244                 fs_err(sdp, "can't create rename glock: %d\n", error);
 245                 goto fail_live;
 246         }
 247
 248         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 249                                CREATE, &sdp->sd_trans_gl);
 250         if (error) {
 251                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 252                 goto fail_rename;
 253         }
 254         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
 255
 256         return 0;
 257
 258  fail_trans:
 259         gfs2_glock_put(sdp->sd_trans_gl);
 260
 261  fail_rename:
 262         gfs2_glock_put(sdp->sd_rename_gl);
 263
 264  fail_live:
 265         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 266
 267  fail_mount:
 268         gfs2_glock_dq_uninit(mount_gh);
 269
 270  fail:
 271         while (sdp->sd_glockd_num--)
 272                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
 273
 274         kthread_stop(sdp->sd_scand_process);
 275
 276         return error;
 277 }
 278
 279 int gfs2_lookup_root(struct gfs2_sbd *sdp)
 280 {
 281         int error;
 282         struct gfs2_glock *gl;
 283         struct gfs2_inode *ip;
 284
 285         error = gfs2_glock_get(sdp, sdp->sd_sb.sb_root_dir.no_addr,
 286                                &gfs2_inode_glops, CREATE, &gl);
 287         if (!error) {
 288                 error = gfs2_inode_get(gl, &sdp->sd_sb.sb_root_dir,
 289                                        CREATE, &ip);
 290                 if (!error) {
 291                         if (!error)
 292                                 gfs2_inode_min_init(ip, DT_DIR);
 293                         sdp->sd_root_dir = gfs2_ip2v(ip);
 294                         gfs2_inode_put(ip);
 295                 }
 296                 gfs2_glock_put(gl);
 297         }
 298
 299         return error;
 300 }
 301
 302 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 303 {
 304         struct super_block *sb = sdp->sd_vfs;
 305         struct gfs2_holder sb_gh;
 306         struct inode *inode;
 307         int error = 0;
 308
 309         if (undo) {
 310                 iput(sdp->sd_master_dir);
 311                 return 0;
 312         }
 313
 314         error = gfs2_glock_nq_num(sdp,
 315                                  GFS2_SB_LOCK, &gfs2_meta_glops,
 316                                  LM_ST_SHARED, 0, &sb_gh);
 317         if (error) {
 318                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 319                 return error;
 320         }
 321
 322         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 323         if (error) {
 324                 fs_err(sdp, "can't read superblock: %d\n", error);
 325                 goto out;
 326         }
 327
 328         /* Set up the buffer cache and SB for real */
 329         error = -EINVAL;
 330         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 331                 fs_err(sdp, "FS block size (%u) is too small for device "
 332                        "block size (%u)\n",
 333                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 334                 goto out;
 335         }
 336         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 337                 fs_err(sdp, "FS block size (%u) is too big for machine "
 338                        "page size (%u)\n",
 339                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 340                 goto out;
 341         }
 342
 343         /* Get rid of buffers from the original block size */
 344         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
 345         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
 346
 347         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 348
 349         /* Get the root inode */
 350         error = gfs2_lookup_root(sdp);
 351         if (error) {
 352                 fs_err(sdp, "can't read in root inode: %d\n", error);
 353                 goto out;
 354         }
 355
 356         /* Get the root inode/dentry */
 357         inode = sdp->sd_root_dir;
 358         if (!inode) {
 359                 fs_err(sdp, "can't get root inode\n");
 360                 error = -ENOMEM;
 361                 goto out_rooti;
 362         }
 363
 364         igrab(inode);
 365         sb->s_root = d_alloc_root(inode);
 366         if (!sb->s_root) {
 367                 fs_err(sdp, "can't get root dentry\n");
 368                 error = -ENOMEM;
 369                 goto out_rooti;
 370         }
 371
 372 out:
 373         gfs2_glock_dq_uninit(&sb_gh);
 374
 375         return error;
 376 out_rooti:
 377         iput(sdp->sd_root_dir);
 378         goto out;
 379 }
 380
 381 static int init_journal(struct gfs2_sbd *sdp, int undo)
 382 {
 383         struct gfs2_holder ji_gh;
 384         struct task_struct *p;
 385         int jindex = 1;
 386         int error = 0;
 387
 388         if (undo) {
 389                 jindex = 0;
 390                 goto fail_recoverd;
 391         }
 392
 393         error = gfs2_lookup_simple(sdp->sd_master_dir, "jindex",
 394                                    &sdp->sd_jindex);
 395         if (error) {
 396                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 397                 return error;
 398         }
 399         set_bit(GLF_STICKY, &get_v2ip(sdp->sd_jindex)->i_gl->gl_flags);
 400
 401         /* Load in the journal index special file */
 402
 403         error = gfs2_jindex_hold(sdp, &ji_gh);
 404         if (error) {
 405                 fs_err(sdp, "can't read journal index: %d\n", error);
 406                 goto fail;
 407         }
 408
 409         error = -EINVAL;
 410         if (!gfs2_jindex_size(sdp)) {
 411                 fs_err(sdp, "no journals!\n");
 412                 goto fail_jindex;
 413         }
 414
 415         if (sdp->sd_args.ar_spectator) {
 416                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 417                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 418         } else {
 419                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 420                         fs_err(sdp, "can't mount journal #%u\n",
 421                                sdp->sd_lockstruct.ls_jid);
 422                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 423                                gfs2_jindex_size(sdp),
 424                                gfs2_jindex_size(sdp) - 1);
 425                         goto fail_jindex;
 426                 }
 427                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 428
 429                 error = gfs2_glock_nq_num(sdp,
 430                                           sdp->sd_lockstruct.ls_jid,
 431                                           &gfs2_journal_glops,
 432                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 433                                           &sdp->sd_journal_gh);
 434                 if (error) {
 435                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 436                         goto fail_jindex;
 437                 }
 438
 439                 error = gfs2_glock_nq_init(
 440                                 get_v2ip(sdp->sd_jdesc->jd_inode)->i_gl,
 441                                            LM_ST_SHARED,
 442                                            LM_FLAG_NOEXP | GL_EXACT,
 443                                            &sdp->sd_jinode_gh);
 444                 if (error) {
 445                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 446                                error);
 447                         goto fail_journal_gh;
 448                 }
 449
 450                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 451                 if (error) {
 452                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 453                                sdp->sd_jdesc->jd_jid, error);
 454                         goto fail_jinode_gh;
 455                 }
 456                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 457         }
 458
 459         if (sdp->sd_lockstruct.ls_first) {
 460                 unsigned int x;
 461                 for (x = 0; x < sdp->sd_journals; x++) {
 462                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
 463                                                      WAIT);
 464                         if (error) {
 465                                 fs_err(sdp, "error recovering journal %u: %d\n",
 466                                        x, error);
 467                                 goto fail_jinode_gh;
 468                         }
 469                 }
 470
 471                 gfs2_lm_others_may_mount(sdp);
 472         } else if (!sdp->sd_args.ar_spectator) {
 473                 error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
 474                 if (error) {
 475                         fs_err(sdp, "error recovering my journal: %d\n", error);
 476                         goto fail_jinode_gh;
 477                 }
 478         }
 479
 480         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 481         gfs2_glock_dq_uninit(&ji_gh);
 482         jindex = 0;
 483
 484         /* Disown my Journal glock */
 485
 486         sdp->sd_journal_gh.gh_owner = NULL;
 487         sdp->sd_jinode_gh.gh_owner = NULL;
 488
 489         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 490         error = IS_ERR(p);
 491         if (error) {
 492                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 493                 goto fail_jinode_gh;
 494         }
 495         sdp->sd_recoverd_process = p;
 496
 497         return 0;
 498
 499  fail_recoverd:
 500         kthread_stop(sdp->sd_recoverd_process);
 501
 502  fail_jinode_gh:
 503         if (!sdp->sd_args.ar_spectator)
 504                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 505
 506  fail_journal_gh:
 507         if (!sdp->sd_args.ar_spectator)
 508                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 509
 510  fail_jindex:
 511         gfs2_jindex_free(sdp);
 512         if (jindex)
 513                 gfs2_glock_dq_uninit(&ji_gh);
 514
 515  fail:
 516         iput(sdp->sd_jindex);
 517
 518         return error;
 519 }
 520
 521
 522 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 523 {
 524         int error = 0;
 525
 526         if (undo)
 527                 goto fail_qinode;
 528
 529         error = gfs2_lookup_master_dir(sdp);
 530         if (error) {
 531                 fs_err(sdp, "can't read in master directory: %d\n", error);
 532                 goto fail;
 533         }
 534
 535         error = init_journal(sdp, undo);
 536         if (error)
 537                 goto fail_master;
 538
 539         /* Read in the master inode number inode */
 540         error = gfs2_lookup_simple(sdp->sd_master_dir, "inum",
 541                                    &sdp->sd_inum_inode);
 542         if (error) {
 543                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 544                 goto fail_journal;
 545         }
 546
 547
 548         /* Read in the master statfs inode */
 549         error = gfs2_lookup_simple(sdp->sd_master_dir, "statfs",
 550                                    &sdp->sd_statfs_inode);
 551         if (error) {
 552                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 553                 goto fail_inum;
 554         }
 555
 556         /* Read in the resource index inode */
 557         error = gfs2_lookup_simple(sdp->sd_master_dir, "rindex",
 558                                    &sdp->sd_rindex);
 559         if (error) {
 560                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 561                 goto fail_statfs;
 562         }
 563         set_bit(GLF_STICKY, &get_v2ip(sdp->sd_rindex)->i_gl->gl_flags);
 564         sdp->sd_rindex_vn = get_v2ip(sdp->sd_rindex)->i_gl->gl_vn - 1;
 565
 566         /* Read in the quota inode */
 567         error = gfs2_lookup_simple(sdp->sd_master_dir, "quota",
 568                                    &sdp->sd_quota_inode);
 569         if (error) {
 570                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 571                 goto fail_rindex;
 572         }
 573         return 0;
 574
 575 fail_qinode:
 576         iput(sdp->sd_quota_inode);
 577
 578 fail_rindex:
 579         gfs2_clear_rgrpd(sdp);
 580         iput(sdp->sd_rindex);
 581
 582 fail_statfs:
 583         iput(sdp->sd_statfs_inode);
 584
 585 fail_inum:
 586         iput(sdp->sd_inum_inode);
 587 fail_journal:
 588         init_journal(sdp, UNDO);
 589 fail_master:
 590         iput(sdp->sd_master_dir);
 591 fail:
 592         return error;
 593 }
 594
 595 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 596 {
 597         struct inode *pn = NULL;
 598         char buf[30];
 599         int error = 0;
 600
 601         if (sdp->sd_args.ar_spectator)
 602                 return 0;
 603
 604         if (undo)
 605                 goto fail_qc_gh;
 606
 607         error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node", &pn);
 608         if (error) {
 609                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 610                 return error;
 611         }
 612
 613         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 614         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ir_inode);
 615         if (error) {
 616                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 617                 goto fail;
 618         }
 619
 620         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 621         error = gfs2_lookup_simple(pn, buf, &sdp->sd_sc_inode);
 622         if (error) {
 623                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 624                 goto fail_ir_i;
 625         }
 626
 627         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 628         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ut_inode);
 629         if (error) {
 630                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 631                 goto fail_sc_i;
 632         }
 633
 634         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 635         error = gfs2_lookup_simple(pn, buf, &sdp->sd_qc_inode);
 636         if (error) {
 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         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_ir_inode)->i_gl,
 645                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 646                                    &sdp->sd_ir_gh);
 647         if (error) {
 648                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 649                 goto fail_qc_i;
 650         }
 651
 652         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_sc_inode)->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         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_ut_inode)->i_gl,
 661                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 662                                    &sdp->sd_ut_gh);
 663         if (error) {
 664                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 665                 goto fail_sc_gh;
 666         }
 667
 668         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_qc_inode)->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(sdp);
 788
 789         error = init_names(sdp, silent);
 790         if (error)
 791                 goto fail;
 792
 793         error = gfs2_sys_fs_add(sdp);
 794         if (error)
 795                 goto fail;
 796
 797         error = gfs2_lm_mount(sdp, silent);
 798         if (error)
 799                 goto fail_sys;
 800
 801         error = init_locking(sdp, &mount_gh, DO);
 802         if (error)
 803                 goto fail_lm;
 804
 805         error = init_sb(sdp, silent, DO);
 806         if (error)
 807                 goto fail_locking;
 808
 809         error = init_inodes(sdp, DO);
 810         if (error)
 811                 goto fail_sb;
 812
 813         error = init_per_node(sdp, DO);
 814         if (error)
 815                 goto fail_inodes;
 816
 817         error = gfs2_statfs_init(sdp);
 818         if (error) {
 819                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 820                 goto fail_per_node;
 821         }
 822
 823         error = init_threads(sdp, DO);
 824         if (error)
 825                 goto fail_per_node;
 826
 827         if (!(sb->s_flags & MS_RDONLY)) {
 828                 error = gfs2_make_fs_rw(sdp);
 829                 if (error) {
 830                         fs_err(sdp, "can't make FS RW: %d\n", error);
 831                         goto fail_threads;
 832                 }
 833         }
 834
 835         gfs2_glock_dq_uninit(&mount_gh);
 836
 837         return 0;
 838
 839  fail_threads:
 840         init_threads(sdp, UNDO);
 841
 842  fail_per_node:
 843         init_per_node(sdp, UNDO);
 844
 845  fail_inodes:
 846         init_inodes(sdp, UNDO);
 847
 848  fail_sb:
 849         init_sb(sdp, 0, UNDO);
 850
 851  fail_locking:
 852         init_locking(sdp, &mount_gh, UNDO);
 853
 854  fail_lm:
 855         gfs2_gl_hash_clear(sdp, WAIT);
 856         gfs2_lm_unmount(sdp);
 857         while (invalidate_inodes(sb))
 858                 yield();
 859
 860  fail_sys:
 861         gfs2_sys_fs_del(sdp);
 862
 863  fail:
 864         vfree(sdp);
 865         set_v2sdp(sb, NULL);
 866
 867         return error;
 868 }
 869
 870 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 871                                        int flags, const char *dev_name,
 872                                        void *data)
 873 {
 874         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 875 }
 876
 877 struct file_system_type gfs2_fs_type = {
 878         .name = "gfs2",
 879         .fs_flags = FS_REQUIRES_DEV,
 880         .get_sb = gfs2_get_sb,
 881         .kill_sb = kill_block_super,
 882         .owner = THIS_MODULE,
 883 };
 884