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