git.oblomov.eu Git - linux-2.6/blob - 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         init_MUTEX(&sdp->sd_invalidate_inodes_mutex);
  63
  64         init_MUTEX(&sdp->sd_inum_mutex);
  65         spin_lock_init(&sdp->sd_statfs_spin);
  66         init_MUTEX(&sdp->sd_statfs_mutex);
  67
  68         spin_lock_init(&sdp->sd_rindex_spin);
  69         init_MUTEX(&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         init_MUTEX(&sdp->sd_jindex_mutex);
  77
  78         INIT_LIST_HEAD(&sdp->sd_unlinked_list);
  79         spin_lock_init(&sdp->sd_unlinked_spin);
  80         init_MUTEX(&sdp->sd_unlinked_mutex);
  81
  82         INIT_LIST_HEAD(&sdp->sd_quota_list);
  83         spin_lock_init(&sdp->sd_quota_spin);
  84         init_MUTEX(&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         init_MUTEX(&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         init_MUTEX(&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 - GFS2_BASIC_BLOCK_SHIFT;
 132         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 133 }
 134
 135 static int init_names(struct gfs2_sbd *sdp, int silent)
 136 {
 137         struct gfs2_sb *sb = NULL;
 138         char *proto, *table;
 139         int error = 0;
 140
 141         proto = sdp->sd_args.ar_lockproto;
 142         table = sdp->sd_args.ar_locktable;
 143
 144         /*  Try to autodetect  */
 145
 146         if (!proto[0] || !table[0]) {
 147                 struct buffer_head *bh;
 148                 bh = sb_getblk(sdp->sd_vfs,
 149                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 150                 lock_buffer(bh);
 151                 clear_buffer_uptodate(bh);
 152                 clear_buffer_dirty(bh);
 153                 unlock_buffer(bh);
 154                 ll_rw_block(READ, 1, &bh);
 155                 wait_on_buffer(bh);
 156
 157                 if (!buffer_uptodate(bh)) {
 158                         brelse(bh);
 159                         return -EIO;
 160                 }
 161
 162                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
 163                 if (!sb) {
 164                         brelse(bh);
 165                         return -ENOMEM;
 166                 }
 167                 gfs2_sb_in(sb, bh->b_data);
 168                 brelse(bh);
 169
 170                 error = gfs2_check_sb(sdp, sb, silent);
 171                 if (error)
 172                         goto out;
 173
 174                 if (!proto[0])
 175                         proto = sb->sb_lockproto;
 176                 if (!table[0])
 177                         table = sb->sb_locktable;
 178         }
 179
 180         if (!table[0])
 181                 table = sdp->sd_vfs->s_id;
 182
 183         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 184         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 185
 186  out:
 187         kfree(sb);
 188
 189         return error;
 190 }
 191
 192 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 193                         int undo)
 194 {
 195         struct task_struct *p;
 196         int error = 0;
 197
 198         if (undo)
 199                 goto fail_trans;
 200
 201         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
 202         error = IS_ERR(p);
 203         if (error) {
 204                 fs_err(sdp, "can't start scand thread: %d\n", error);
 205                 return error;
 206         }
 207         sdp->sd_scand_process = p;
 208
 209         for (sdp->sd_glockd_num = 0;
 210              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
 211              sdp->sd_glockd_num++) {
 212                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
 213                 error = IS_ERR(p);
 214                 if (error) {
 215                         fs_err(sdp, "can't start glockd thread: %d\n", error);
 216                         goto fail;
 217                 }
 218                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
 219         }
 220
 221         error = gfs2_glock_nq_num(sdp,
 222                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 223                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 224                                   mount_gh);
 225         if (error) {
 226                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 227                 goto fail;
 228         }
 229
 230         error = gfs2_glock_nq_num(sdp,
 231                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 232                                   LM_ST_SHARED,
 233                                   LM_FLAG_NOEXP | GL_EXACT | GL_NEVER_RECURSE,
 234                                   &sdp->sd_live_gh);
 235         if (error) {
 236                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 237                 goto fail_mount;
 238         }
 239
 240         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 241                                CREATE, &sdp->sd_rename_gl);
 242         if (error) {
 243                 fs_err(sdp, "can't create rename glock: %d\n", error);
 244                 goto fail_live;
 245         }
 246
 247         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 248                                CREATE, &sdp->sd_trans_gl);
 249         if (error) {
 250                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 251                 goto fail_rename;
 252         }
 253         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
 254
 255         return 0;
 256
 257  fail_trans:
 258         gfs2_glock_put(sdp->sd_trans_gl);
 259
 260  fail_rename:
 261         gfs2_glock_put(sdp->sd_rename_gl);
 262
 263  fail_live:
 264         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 265
 266  fail_mount:
 267         gfs2_glock_dq_uninit(mount_gh);
 268
 269  fail:
 270         while (sdp->sd_glockd_num--)
 271                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
 272
 273         kthread_stop(sdp->sd_scand_process);
 274
 275         return error;
 276 }
 277
 278 int gfs2_lookup_root(struct gfs2_sbd *sdp)
 279 {
 280         int error;
 281         struct gfs2_glock *gl;
 282         struct gfs2_inode *ip;
 283
 284         error = gfs2_glock_get(sdp, sdp->sd_sb.sb_root_dir.no_addr,
 285                                &gfs2_inode_glops, CREATE, &gl);
 286         if (!error) {
 287                 error = gfs2_inode_get(gl, &sdp->sd_sb.sb_root_dir,
 288                                        CREATE, &ip);
 289                 if (!error) {
 290                         if (!error)
 291                                 gfs2_inode_min_init(ip, DT_DIR);
 292                         sdp->sd_root_dir = gfs2_ip2v(ip);
 293                         gfs2_inode_put(ip);
 294                 }
 295                 gfs2_glock_put(gl);
 296         }
 297
 298         return error;
 299 }
 300
 301 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 302 {
 303         struct super_block *sb = sdp->sd_vfs;
 304         struct gfs2_holder sb_gh;
 305         struct inode *inode;
 306         int error = 0;
 307
 308         if (undo) {
 309                 iput(sdp->sd_master_dir);
 310                 return 0;
 311         }
 312
 313         error = gfs2_glock_nq_num(sdp,
 314                                  GFS2_SB_LOCK, &gfs2_meta_glops,
 315                                  LM_ST_SHARED, 0, &sb_gh);
 316         if (error) {
 317                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 318                 return error;
 319         }
 320
 321         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 322         if (error) {
 323                 fs_err(sdp, "can't read superblock: %d\n", error);
 324                 goto out;
 325         }
 326
 327         /* Set up the buffer cache and SB for real */
 328         error = -EINVAL;
 329         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 330                 fs_err(sdp, "FS block size (%u) is too small for device "
 331                        "block size (%u)\n",
 332                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 333                 goto out;
 334         }
 335         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 336                 fs_err(sdp, "FS block size (%u) is too big for machine "
 337                        "page size (%u)\n",
 338                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 339                 goto out;
 340         }
 341
 342         /* Get rid of buffers from the original block size */
 343         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
 344         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
 345
 346         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 347
 348         /* Get the root inode */
 349         error = gfs2_lookup_root(sdp);
 350         if (error) {
 351                 fs_err(sdp, "can't read in root inode: %d\n", error);
 352                 goto out;
 353         }
 354
 355         /* Get the root inode/dentry */
 356         inode = sdp->sd_root_dir;
 357         if (!inode) {
 358                 fs_err(sdp, "can't get root inode\n");
 359                 error = -ENOMEM;
 360                 goto out_rooti;
 361         }
 362
 363         igrab(inode);
 364         sb->s_root = d_alloc_root(inode);
 365         if (!sb->s_root) {
 366                 fs_err(sdp, "can't get root dentry\n");
 367                 error = -ENOMEM;
 368                 goto out_rooti;
 369         }
 370
 371 out:
 372         gfs2_glock_dq_uninit(&sb_gh);
 373
 374         return error;
 375 out_rooti:
 376         iput(sdp->sd_root_dir);
 377         goto out;
 378 }
 379
 380 static int init_journal(struct gfs2_sbd *sdp, int undo)
 381 {
 382         struct gfs2_holder ji_gh;
 383         struct task_struct *p;
 384         int jindex = 1;
 385         int error = 0;
 386
 387         if (undo) {
 388                 jindex = 0;
 389                 goto fail_recoverd;
 390         }
 391
 392         error = gfs2_lookup_simple(sdp->sd_master_dir, "jindex",
 393                                    &sdp->sd_jindex);
 394         if (error) {
 395                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 396                 return error;
 397         }
 398         set_bit(GLF_STICKY, &get_v2ip(sdp->sd_jindex)->i_gl->gl_flags);
 399
 400         /* Load in the journal index special file */
 401
 402         error = gfs2_jindex_hold(sdp, &ji_gh);
 403         if (error) {
 404                 fs_err(sdp, "can't read journal index: %d\n", error);
 405                 goto fail;
 406         }
 407
 408         error = -EINVAL;
 409         if (!gfs2_jindex_size(sdp)) {
 410                 fs_err(sdp, "no journals!\n");
 411                 goto fail_jindex;
 412         }
 413
 414         if (sdp->sd_args.ar_spectator) {
 415                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 416                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 417         } else {
 418                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 419                         fs_err(sdp, "can't mount journal #%u\n",
 420                                sdp->sd_lockstruct.ls_jid);
 421                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 422                                gfs2_jindex_size(sdp),
 423                                gfs2_jindex_size(sdp) - 1);
 424                         goto fail_jindex;
 425                 }
 426                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 427
 428                 error = gfs2_glock_nq_num(sdp,
 429                                           sdp->sd_lockstruct.ls_jid,
 430                                           &gfs2_journal_glops,
 431                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 432                                           &sdp->sd_journal_gh);
 433                 if (error) {
 434                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 435                         goto fail_jindex;
 436                 }
 437
 438                 error = gfs2_glock_nq_init(get_v2ip(sdp->sd_jdesc->jd_inode)->i_gl,
 439                                            LM_ST_SHARED,
 440                                            LM_FLAG_NOEXP | GL_EXACT,
 441                                            &sdp->sd_jinode_gh);
 442                 if (error) {
 443                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 444                                error);
 445                         goto fail_journal_gh;
 446                 }
 447
 448                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 449                 if (error) {
 450                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 451                                sdp->sd_jdesc->jd_jid, error);
 452                         goto fail_jinode_gh;
 453                 }
 454                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 455         }
 456
 457         if (sdp->sd_lockstruct.ls_first) {
 458                 unsigned int x;
 459                 for (x = 0; x < sdp->sd_journals; x++) {
 460                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
 461                                                      WAIT);
 462                         if (error) {
 463                                 fs_err(sdp, "error recovering journal %u: %d\n",
 464                                        x, error);
 465                                 goto fail_jinode_gh;
 466                         }
 467                 }
 468
 469                 gfs2_lm_others_may_mount(sdp);
 470         } else if (!sdp->sd_args.ar_spectator) {
 471                 error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
 472                 if (error) {
 473                         fs_err(sdp, "error recovering my journal: %d\n", error);
 474                         goto fail_jinode_gh;
 475                 }
 476         }
 477
 478         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 479         gfs2_glock_dq_uninit(&ji_gh);
 480         jindex = 0;
 481
 482         /* Disown my Journal glock */
 483
 484         sdp->sd_journal_gh.gh_owner = NULL;
 485         sdp->sd_jinode_gh.gh_owner = NULL;
 486
 487         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 488         error = IS_ERR(p);
 489         if (error) {
 490                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 491                 goto fail_jinode_gh;
 492         }
 493         sdp->sd_recoverd_process = p;
 494
 495         return 0;
 496
 497  fail_recoverd:
 498         kthread_stop(sdp->sd_recoverd_process);
 499
 500  fail_jinode_gh:
 501         if (!sdp->sd_args.ar_spectator)
 502                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 503
 504  fail_journal_gh:
 505         if (!sdp->sd_args.ar_spectator)
 506                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 507
 508  fail_jindex:
 509         gfs2_jindex_free(sdp);
 510         if (jindex)
 511                 gfs2_glock_dq_uninit(&ji_gh);
 512
 513  fail:
 514         iput(sdp->sd_jindex);
 515
 516         return error;
 517 }
 518
 519
 520 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 521 {
 522         int error = 0;
 523
 524         if (undo)
 525                 goto fail_qinode;
 526
 527         error = gfs2_lookup_master_dir(sdp);
 528         if (error) {
 529                 fs_err(sdp, "can't read in master directory: %d\n", error);
 530                 goto fail;
 531         }
 532
 533         error = init_journal(sdp, undo);
 534         if (error)
 535                 goto fail_master;
 536
 537         /* Read in the master inode number inode */
 538         error = gfs2_lookup_simple(sdp->sd_master_dir, "inum",
 539                                    &sdp->sd_inum_inode);
 540         if (error) {
 541                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 542                 goto fail_journal;
 543         }
 544
 545
 546         /* Read in the master statfs inode */
 547         error = gfs2_lookup_simple(sdp->sd_master_dir, "statfs",
 548                                    &sdp->sd_statfs_inode);
 549         if (error) {
 550                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 551                 goto fail_inum;
 552         }
 553
 554         /* Read in the resource index inode */
 555         error = gfs2_lookup_simple(sdp->sd_master_dir, "rindex",
 556                                    &sdp->sd_rindex);
 557         if (error) {
 558                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 559                 goto fail_statfs;
 560         }
 561         set_bit(GLF_STICKY, &get_v2ip(sdp->sd_rindex)->i_gl->gl_flags);
 562         sdp->sd_rindex_vn = get_v2ip(sdp->sd_rindex)->i_gl->gl_vn - 1;
 563
 564         /* Read in the quota inode */
 565         error = gfs2_lookup_simple(sdp->sd_master_dir, "quota",
 566                                    &sdp->sd_quota_inode);
 567         if (error) {
 568                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 569                 goto fail_rindex;
 570         }
 571         return 0;
 572
 573 fail_qinode:
 574         iput(sdp->sd_quota_inode);
 575
 576 fail_rindex:
 577         gfs2_clear_rgrpd(sdp);
 578         iput(sdp->sd_rindex);
 579
 580 fail_statfs:
 581         iput(sdp->sd_statfs_inode);
 582
 583 fail_inum:
 584         iput(sdp->sd_inum_inode);
 585 fail_journal:
 586         init_journal(sdp, UNDO);
 587 fail_master:
 588         iput(sdp->sd_master_dir);
 589 fail:
 590         return error;
 591 }
 592
 593 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 594 {
 595         struct inode *pn = NULL;
 596         char buf[30];
 597         int error = 0;
 598
 599         if (sdp->sd_args.ar_spectator)
 600                 return 0;
 601
 602         if (undo)
 603                 goto fail_qc_gh;
 604
 605         error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node", &pn);
 606         if (error) {
 607                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 608                 return error;
 609         }
 610
 611         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 612         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ir_inode);
 613         if (error) {
 614                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 615                 goto fail;
 616         }
 617
 618         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 619         error = gfs2_lookup_simple(pn, buf, &sdp->sd_sc_inode);
 620         if (error) {
 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         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ut_inode);
 627         if (error) {
 628                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 629                 goto fail_sc_i;
 630         }
 631
 632         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 633         error = gfs2_lookup_simple(pn, buf, &sdp->sd_qc_inode);
 634         if (error) {
 635                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 636                 goto fail_ut_i;
 637         }
 638
 639         iput(pn);
 640         pn = NULL;
 641
 642         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_ir_inode)->i_gl,
 643                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 644                                    &sdp->sd_ir_gh);
 645         if (error) {
 646                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 647                 goto fail_qc_i;
 648         }
 649
 650         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_sc_inode)->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         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_ut_inode)->i_gl,
 659                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 660                                    &sdp->sd_ut_gh);
 661         if (error) {
 662                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 663                 goto fail_sc_gh;
 664         }
 665
 666         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_qc_inode)->i_gl,
 667                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 668                                    &sdp->sd_qc_gh);
 669         if (error) {
 670                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 671                 goto fail_ut_gh;
 672         }
 673
 674         return 0;
 675
 676  fail_qc_gh:
 677         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 678
 679  fail_ut_gh:
 680         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 681
 682  fail_sc_gh:
 683         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 684
 685  fail_ir_gh:
 686         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 687
 688  fail_qc_i:
 689         iput(sdp->sd_qc_inode);
 690
 691  fail_ut_i:
 692         iput(sdp->sd_ut_inode);
 693
 694  fail_sc_i:
 695         iput(sdp->sd_sc_inode);
 696
 697  fail_ir_i:
 698         iput(sdp->sd_ir_inode);
 699
 700  fail:
 701         if (pn)
 702                 iput(pn);
 703         return error;
 704 }
 705
 706 static int init_threads(struct gfs2_sbd *sdp, int undo)
 707 {
 708         struct task_struct *p;
 709         int error = 0;
 710
 711         if (undo)
 712                 goto fail_inoded;
 713
 714         sdp->sd_log_flush_time = jiffies;
 715         sdp->sd_jindex_refresh_time = jiffies;
 716
 717         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 718         error = IS_ERR(p);
 719         if (error) {
 720                 fs_err(sdp, "can't start logd thread: %d\n", error);
 721                 return error;
 722         }
 723         sdp->sd_logd_process = p;
 724
 725         sdp->sd_statfs_sync_time = jiffies;
 726         sdp->sd_quota_sync_time = jiffies;
 727
 728         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 729         error = IS_ERR(p);
 730         if (error) {
 731                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 732                 goto fail;
 733         }
 734         sdp->sd_quotad_process = p;
 735
 736         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 737         error = IS_ERR(p);
 738         if (error) {
 739                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 740                 goto fail_quotad;
 741         }
 742         sdp->sd_inoded_process = p;
 743
 744         return 0;
 745
 746  fail_inoded:
 747         kthread_stop(sdp->sd_inoded_process);
 748
 749  fail_quotad:
 750         kthread_stop(sdp->sd_quotad_process);
 751
 752  fail:
 753         kthread_stop(sdp->sd_logd_process);
 754
 755         return error;
 756 }
 757
 758 /**
 759  * fill_super - Read in superblock
 760  * @sb: The VFS superblock
 761  * @data: Mount options
 762  * @silent: Don't complain if it's not a GFS2 filesystem
 763  *
 764  * Returns: errno
 765  */
 766
 767 static int fill_super(struct super_block *sb, void *data, int silent)
 768 {
 769         struct gfs2_sbd *sdp;
 770         struct gfs2_holder mount_gh;
 771         int error;
 772
 773         sdp = init_sbd(sb);
 774         if (!sdp) {
 775                 printk("GFS2: can't alloc struct gfs2_sbd\n");
 776                 return -ENOMEM;
 777         }
 778
 779         error = gfs2_mount_args(sdp, (char *)data, 0);
 780         if (error) {
 781                 printk("GFS2: can't parse mount arguments\n");
 782                 goto fail;
 783         }
 784
 785         init_vfs(sdp);
 786
 787         error = init_names(sdp, silent);
 788         if (error)
 789                 goto fail;
 790
 791         error = gfs2_sys_fs_add(sdp);
 792         if (error)
 793                 goto fail;
 794
 795         error = gfs2_lm_mount(sdp, silent);
 796         if (error)
 797                 goto fail_sys;
 798
 799         error = init_locking(sdp, &mount_gh, DO);
 800         if (error)
 801                 goto fail_lm;
 802
 803         error = init_sb(sdp, silent, DO);
 804         if (error)
 805                 goto fail_locking;
 806
 807         error = init_inodes(sdp, DO);
 808         if (error)
 809                 goto fail_sb;
 810
 811         error = init_per_node(sdp, DO);
 812         if (error)
 813                 goto fail_inodes;
 814
 815         error = gfs2_statfs_init(sdp);
 816         if (error) {
 817                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 818                 goto fail_per_node;
 819         }
 820
 821         error = init_threads(sdp, DO);
 822         if (error)
 823                 goto fail_per_node;
 824
 825         if (!(sb->s_flags & MS_RDONLY)) {
 826                 error = gfs2_make_fs_rw(sdp);
 827                 if (error) {
 828                         fs_err(sdp, "can't make FS RW: %d\n", error);
 829                         goto fail_threads;
 830                 }
 831         }
 832
 833         gfs2_glock_dq_uninit(&mount_gh);
 834
 835         return 0;
 836
 837  fail_threads:
 838         init_threads(sdp, UNDO);
 839
 840  fail_per_node:
 841         init_per_node(sdp, UNDO);
 842
 843  fail_inodes:
 844         init_inodes(sdp, UNDO);
 845
 846  fail_sb:
 847         init_sb(sdp, 0, UNDO);
 848
 849  fail_locking:
 850         init_locking(sdp, &mount_gh, UNDO);
 851
 852  fail_lm:
 853         gfs2_gl_hash_clear(sdp, WAIT);
 854         gfs2_lm_unmount(sdp);
 855         while (invalidate_inodes(sb))
 856                 yield();
 857
 858  fail_sys:
 859         gfs2_sys_fs_del(sdp);
 860
 861  fail:
 862         vfree(sdp);
 863         set_v2sdp(sb, NULL);
 864
 865         return error;
 866 }
 867
 868 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 869                                        int flags, const char *dev_name,
 870                                        void *data)
 871 {
 872         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 873 }
 874
 875 struct file_system_type gfs2_fs_type = {
 876         .name = "gfs2",
 877         .fs_flags = FS_REQUIRES_DEV,
 878         .get_sb = gfs2_get_sb,
 879         .kill_sb = kill_block_super,
 880         .owner = THIS_MODULE,
 881 };
 882