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 int gfs2_lookup_root(struct gfs2_sbd *sdp)
 284 {
 285         int error;
 286         struct gfs2_glock *gl;
 287         struct gfs2_inode *ip;
 288
 289         error = gfs2_glock_get(sdp, sdp->sd_sb.sb_root_dir.no_addr,
 290                                &gfs2_inode_glops, CREATE, &gl);
 291         if (!error) {
 292                 error = gfs2_inode_get(gl, &sdp->sd_sb.sb_root_dir,
 293                                        CREATE, &ip);
 294                 if (!error) {
 295                         if (!error)
 296                                 gfs2_inode_min_init(ip, DT_DIR);
 297                         sdp->sd_root_dir = gfs2_ip2v(ip);
 298                         gfs2_inode_put(ip);
 299                 }
 300                 gfs2_glock_put(gl);
 301         }
 302
 303         return error;
 304 }
 305
 306 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 307 {
 308         struct super_block *sb = sdp->sd_vfs;
 309         struct gfs2_holder sb_gh;
 310         struct inode *inode;
 311         int error = 0;
 312
 313         if (undo) {
 314                 iput(sdp->sd_master_dir);
 315                 return 0;
 316         }
 317
 318         error = gfs2_glock_nq_num(sdp,
 319                                  GFS2_SB_LOCK, &gfs2_meta_glops,
 320                                  LM_ST_SHARED, 0, &sb_gh);
 321         if (error) {
 322                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 323                 return error;
 324         }
 325
 326         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 327         if (error) {
 328                 fs_err(sdp, "can't read superblock: %d\n", error);
 329                 goto out;
 330         }
 331
 332         /* Set up the buffer cache and SB for real */
 333         error = -EINVAL;
 334         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 335                 fs_err(sdp, "FS block size (%u) is too small for device "
 336                        "block size (%u)\n",
 337                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 338                 goto out;
 339         }
 340         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 341                 fs_err(sdp, "FS block size (%u) is too big for machine "
 342                        "page size (%u)\n",
 343                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 344                 goto out;
 345         }
 346
 347         /* Get rid of buffers from the original block size */
 348         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
 349         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
 350
 351         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 352
 353         /* Get the root inode */
 354         error = gfs2_lookup_root(sdp);
 355         if (error) {
 356                 fs_err(sdp, "can't read in root inode: %d\n", error);
 357                 goto out;
 358         }
 359
 360         /* Get the root inode/dentry */
 361         inode = sdp->sd_root_dir;
 362         if (!inode) {
 363                 fs_err(sdp, "can't get root inode\n");
 364                 error = -ENOMEM;
 365                 goto out_rooti;
 366         }
 367
 368         igrab(inode);
 369         sb->s_root = d_alloc_root(inode);
 370         if (!sb->s_root) {
 371                 fs_err(sdp, "can't get root dentry\n");
 372                 error = -ENOMEM;
 373                 goto out_rooti;
 374         }
 375
 376 out:
 377         gfs2_glock_dq_uninit(&sb_gh);
 378
 379         return error;
 380 out_rooti:
 381         iput(sdp->sd_root_dir);
 382         goto out;
 383 }
 384
 385 static int init_journal(struct gfs2_sbd *sdp, int undo)
 386 {
 387         struct gfs2_holder ji_gh;
 388         struct task_struct *p;
 389         struct gfs2_inode *ip;
 390         int jindex = 1;
 391         int error = 0;
 392
 393         if (undo) {
 394                 jindex = 0;
 395                 goto fail_recoverd;
 396         }
 397
 398         error = gfs2_lookup_simple(sdp->sd_master_dir, "jindex",
 399                                    &sdp->sd_jindex);
 400         if (error) {
 401                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 402                 return error;
 403         }
 404         ip = sdp->sd_jindex->u.generic_ip;
 405         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 406
 407         /* Load in the journal index special file */
 408
 409         error = gfs2_jindex_hold(sdp, &ji_gh);
 410         if (error) {
 411                 fs_err(sdp, "can't read journal index: %d\n", error);
 412                 goto fail;
 413         }
 414
 415         error = -EINVAL;
 416         if (!gfs2_jindex_size(sdp)) {
 417                 fs_err(sdp, "no journals!\n");
 418                 goto fail_jindex;
 419         }
 420
 421         if (sdp->sd_args.ar_spectator) {
 422                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 423                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 424         } else {
 425                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 426                         fs_err(sdp, "can't mount journal #%u\n",
 427                                sdp->sd_lockstruct.ls_jid);
 428                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 429                                gfs2_jindex_size(sdp),
 430                                gfs2_jindex_size(sdp) - 1);
 431                         goto fail_jindex;
 432                 }
 433                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 434
 435                 error = gfs2_glock_nq_num(sdp,
 436                                           sdp->sd_lockstruct.ls_jid,
 437                                           &gfs2_journal_glops,
 438                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 439                                           &sdp->sd_journal_gh);
 440                 if (error) {
 441                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 442                         goto fail_jindex;
 443                 }
 444
 445                 ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
 446                 error = gfs2_glock_nq_init(ip->i_gl,
 447                                            LM_ST_SHARED,
 448                                            LM_FLAG_NOEXP | GL_EXACT,
 449                                            &sdp->sd_jinode_gh);
 450                 if (error) {
 451                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 452                                error);
 453                         goto fail_journal_gh;
 454                 }
 455
 456                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 457                 if (error) {
 458                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 459                                sdp->sd_jdesc->jd_jid, error);
 460                         goto fail_jinode_gh;
 461                 }
 462                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 463         }
 464
 465         if (sdp->sd_lockstruct.ls_first) {
 466                 unsigned int x;
 467                 for (x = 0; x < sdp->sd_journals; x++) {
 468                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
 469                                                      WAIT);
 470                         if (error) {
 471                                 fs_err(sdp, "error recovering journal %u: %d\n",
 472                                        x, error);
 473                                 goto fail_jinode_gh;
 474                         }
 475                 }
 476
 477                 gfs2_lm_others_may_mount(sdp);
 478         } else if (!sdp->sd_args.ar_spectator) {
 479                 error = gfs2_recover_journal(sdp->sd_jdesc, WAIT);
 480                 if (error) {
 481                         fs_err(sdp, "error recovering my journal: %d\n", error);
 482                         goto fail_jinode_gh;
 483                 }
 484         }
 485
 486         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 487         gfs2_glock_dq_uninit(&ji_gh);
 488         jindex = 0;
 489
 490         /* Disown my Journal glock */
 491
 492         sdp->sd_journal_gh.gh_owner = NULL;
 493         sdp->sd_jinode_gh.gh_owner = NULL;
 494
 495         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 496         error = IS_ERR(p);
 497         if (error) {
 498                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 499                 goto fail_jinode_gh;
 500         }
 501         sdp->sd_recoverd_process = p;
 502
 503         return 0;
 504
 505  fail_recoverd:
 506         kthread_stop(sdp->sd_recoverd_process);
 507
 508  fail_jinode_gh:
 509         if (!sdp->sd_args.ar_spectator)
 510                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 511
 512  fail_journal_gh:
 513         if (!sdp->sd_args.ar_spectator)
 514                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 515
 516  fail_jindex:
 517         gfs2_jindex_free(sdp);
 518         if (jindex)
 519                 gfs2_glock_dq_uninit(&ji_gh);
 520
 521  fail:
 522         iput(sdp->sd_jindex);
 523
 524         return error;
 525 }
 526
 527
 528 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 529 {
 530         int error = 0;
 531         struct gfs2_inode *ip;
 532
 533         if (undo)
 534                 goto fail_qinode;
 535
 536         error = gfs2_lookup_master_dir(sdp);
 537         if (error) {
 538                 fs_err(sdp, "can't read in master directory: %d\n", error);
 539                 goto fail;
 540         }
 541
 542         error = init_journal(sdp, undo);
 543         if (error)
 544                 goto fail_master;
 545
 546         /* Read in the master inode number inode */
 547         error = gfs2_lookup_simple(sdp->sd_master_dir, "inum",
 548                                    &sdp->sd_inum_inode);
 549         if (error) {
 550                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 551                 goto fail_journal;
 552         }
 553
 554
 555         /* Read in the master statfs inode */
 556         error = gfs2_lookup_simple(sdp->sd_master_dir, "statfs",
 557                                    &sdp->sd_statfs_inode);
 558         if (error) {
 559                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 560                 goto fail_inum;
 561         }
 562
 563         /* Read in the resource index inode */
 564         error = gfs2_lookup_simple(sdp->sd_master_dir, "rindex",
 565                                    &sdp->sd_rindex);
 566         if (error) {
 567                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 568                 goto fail_statfs;
 569         }
 570         ip = sdp->sd_rindex->u.generic_ip;
 571         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 572         sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
 573
 574         /* Read in the quota inode */
 575         error = gfs2_lookup_simple(sdp->sd_master_dir, "quota",
 576                                    &sdp->sd_quota_inode);
 577         if (error) {
 578                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 579                 goto fail_rindex;
 580         }
 581         return 0;
 582
 583 fail_qinode:
 584         iput(sdp->sd_quota_inode);
 585
 586 fail_rindex:
 587         gfs2_clear_rgrpd(sdp);
 588         iput(sdp->sd_rindex);
 589
 590 fail_statfs:
 591         iput(sdp->sd_statfs_inode);
 592
 593 fail_inum:
 594         iput(sdp->sd_inum_inode);
 595 fail_journal:
 596         init_journal(sdp, UNDO);
 597 fail_master:
 598         iput(sdp->sd_master_dir);
 599 fail:
 600         return error;
 601 }
 602
 603 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 604 {
 605         struct inode *pn = NULL;
 606         char buf[30];
 607         int error = 0;
 608         struct gfs2_inode *ip;
 609
 610         if (sdp->sd_args.ar_spectator)
 611                 return 0;
 612
 613         if (undo)
 614                 goto fail_qc_gh;
 615
 616         error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node", &pn);
 617         if (error) {
 618                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 619                 return error;
 620         }
 621
 622         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 623         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ir_inode);
 624         if (error) {
 625                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 626                 goto fail;
 627         }
 628
 629         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 630         error = gfs2_lookup_simple(pn, buf, &sdp->sd_sc_inode);
 631         if (error) {
 632                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 633                 goto fail_ir_i;
 634         }
 635
 636         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 637         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ut_inode);
 638         if (error) {
 639                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 640                 goto fail_sc_i;
 641         }
 642
 643         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 644         error = gfs2_lookup_simple(pn, buf, &sdp->sd_qc_inode);
 645         if (error) {
 646                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 647                 goto fail_ut_i;
 648         }
 649
 650         iput(pn);
 651         pn = NULL;
 652
 653         ip = sdp->sd_ir_inode->u.generic_ip;
 654         error = gfs2_glock_nq_init(ip->i_gl,
 655                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 656                                    &sdp->sd_ir_gh);
 657         if (error) {
 658                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 659                 goto fail_qc_i;
 660         }
 661
 662         ip = sdp->sd_sc_inode->u.generic_ip;
 663         error = gfs2_glock_nq_init(ip->i_gl,
 664                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 665                                    &sdp->sd_sc_gh);
 666         if (error) {
 667                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 668                 goto fail_ir_gh;
 669         }
 670
 671         ip = sdp->sd_ut_inode->u.generic_ip;
 672         error = gfs2_glock_nq_init(ip->i_gl,
 673                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 674                                    &sdp->sd_ut_gh);
 675         if (error) {
 676                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 677                 goto fail_sc_gh;
 678         }
 679
 680         ip = sdp->sd_qc_inode->u.generic_ip;
 681         error = gfs2_glock_nq_init(ip->i_gl,
 682                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 683                                    &sdp->sd_qc_gh);
 684         if (error) {
 685                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 686                 goto fail_ut_gh;
 687         }
 688
 689         return 0;
 690
 691  fail_qc_gh:
 692         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 693
 694  fail_ut_gh:
 695         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 696
 697  fail_sc_gh:
 698         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 699
 700  fail_ir_gh:
 701         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 702
 703  fail_qc_i:
 704         iput(sdp->sd_qc_inode);
 705
 706  fail_ut_i:
 707         iput(sdp->sd_ut_inode);
 708
 709  fail_sc_i:
 710         iput(sdp->sd_sc_inode);
 711
 712  fail_ir_i:
 713         iput(sdp->sd_ir_inode);
 714
 715  fail:
 716         if (pn)
 717                 iput(pn);
 718         return error;
 719 }
 720
 721 static int init_threads(struct gfs2_sbd *sdp, int undo)
 722 {
 723         struct task_struct *p;
 724         int error = 0;
 725
 726         if (undo)
 727                 goto fail_inoded;
 728
 729         sdp->sd_log_flush_time = jiffies;
 730         sdp->sd_jindex_refresh_time = jiffies;
 731
 732         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 733         error = IS_ERR(p);
 734         if (error) {
 735                 fs_err(sdp, "can't start logd thread: %d\n", error);
 736                 return error;
 737         }
 738         sdp->sd_logd_process = p;
 739
 740         sdp->sd_statfs_sync_time = jiffies;
 741         sdp->sd_quota_sync_time = jiffies;
 742
 743         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 744         error = IS_ERR(p);
 745         if (error) {
 746                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 747                 goto fail;
 748         }
 749         sdp->sd_quotad_process = p;
 750
 751         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 752         error = IS_ERR(p);
 753         if (error) {
 754                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 755                 goto fail_quotad;
 756         }
 757         sdp->sd_inoded_process = p;
 758
 759         return 0;
 760
 761  fail_inoded:
 762         kthread_stop(sdp->sd_inoded_process);
 763
 764  fail_quotad:
 765         kthread_stop(sdp->sd_quotad_process);
 766
 767  fail:
 768         kthread_stop(sdp->sd_logd_process);
 769
 770         return error;
 771 }
 772
 773 /**
 774  * fill_super - Read in superblock
 775  * @sb: The VFS superblock
 776  * @data: Mount options
 777  * @silent: Don't complain if it's not a GFS2 filesystem
 778  *
 779  * Returns: errno
 780  */
 781
 782 static int fill_super(struct super_block *sb, void *data, int silent)
 783 {
 784         struct gfs2_sbd *sdp;
 785         struct gfs2_holder mount_gh;
 786         int error;
 787
 788         sdp = init_sbd(sb);
 789         if (!sdp) {
 790                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 791                 return -ENOMEM;
 792         }
 793
 794         error = gfs2_mount_args(sdp, (char *)data, 0);
 795         if (error) {
 796                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 797                 goto fail;
 798         }
 799
 800         init_vfs(sdp);
 801
 802         error = init_names(sdp, silent);
 803         if (error)
 804                 goto fail;
 805
 806         error = gfs2_sys_fs_add(sdp);
 807         if (error)
 808                 goto fail;
 809
 810         error = gfs2_lm_mount(sdp, silent);
 811         if (error)
 812                 goto fail_sys;
 813
 814         error = init_locking(sdp, &mount_gh, DO);
 815         if (error)
 816                 goto fail_lm;
 817
 818         error = init_sb(sdp, silent, DO);
 819         if (error)
 820                 goto fail_locking;
 821
 822         error = init_inodes(sdp, DO);
 823         if (error)
 824                 goto fail_sb;
 825
 826         error = init_per_node(sdp, DO);
 827         if (error)
 828                 goto fail_inodes;
 829
 830         error = gfs2_statfs_init(sdp);
 831         if (error) {
 832                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 833                 goto fail_per_node;
 834         }
 835
 836         error = init_threads(sdp, DO);
 837         if (error)
 838                 goto fail_per_node;
 839
 840         if (!(sb->s_flags & MS_RDONLY)) {
 841                 error = gfs2_make_fs_rw(sdp);
 842                 if (error) {
 843                         fs_err(sdp, "can't make FS RW: %d\n", error);
 844                         goto fail_threads;
 845                 }
 846         }
 847
 848         gfs2_glock_dq_uninit(&mount_gh);
 849
 850         return 0;
 851
 852  fail_threads:
 853         init_threads(sdp, UNDO);
 854
 855  fail_per_node:
 856         init_per_node(sdp, UNDO);
 857
 858  fail_inodes:
 859         init_inodes(sdp, UNDO);
 860
 861  fail_sb:
 862         init_sb(sdp, 0, UNDO);
 863
 864  fail_locking:
 865         init_locking(sdp, &mount_gh, UNDO);
 866
 867  fail_lm:
 868         gfs2_gl_hash_clear(sdp, WAIT);
 869         gfs2_lm_unmount(sdp);
 870         while (invalidate_inodes(sb))
 871                 yield();
 872
 873  fail_sys:
 874         gfs2_sys_fs_del(sdp);
 875
 876  fail:
 877         vfree(sdp);
 878         sb->s_fs_info = NULL;
 879
 880         return error;
 881 }
 882
 883 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 884                                        int flags, const char *dev_name,
 885                                        void *data)
 886 {
 887         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 888 }
 889
 890 struct file_system_type gfs2_fs_type = {
 891         .name = "gfs2",
 892         .fs_flags = FS_REQUIRES_DEV,
 893         .get_sb = gfs2_get_sb,
 894         .kill_sb = kill_block_super,
 895         .owner = THIS_MODULE,
 896 };
 897