SAFE public projects git trees. - safe/jmp/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         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                 goto out_rooti;
 368         }
 369
 370 out:
 371         gfs2_glock_dq_uninit(&sb_gh);
 372
 373         return error;
 374 out_rooti:
 375         iput(sdp->sd_root_dir);
 376         goto out;
 377 }
 378
 379 static int init_journal(struct gfs2_sbd *sdp, int undo)
 380 {
 381         struct gfs2_holder ji_gh;
 382         struct task_struct *p;
 383         int jindex = 1;
 384         int error = 0;
 385
 386         if (undo) {
 387                 jindex = 0;
 388                 goto fail_recoverd;
 389         }
 390
 391         error = gfs2_lookup_simple(sdp->sd_master_dir, "jindex",
 392                                    &sdp->sd_jindex);
 393         if (error) {
 394                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 395                 return error;
 396         }
 397         set_bit(GLF_STICKY, &get_v2ip(sdp->sd_jindex)->i_gl->gl_flags);
 398
 399         /* Load in the journal index special file */
 400
 401         error = gfs2_jindex_hold(sdp, &ji_gh);
 402         if (error) {
 403                 fs_err(sdp, "can't read journal index: %d\n", error);
 404                 goto fail;
 405         }
 406
 407         error = -EINVAL;
 408         if (!gfs2_jindex_size(sdp)) {
 409                 fs_err(sdp, "no journals!\n");
 410                 goto fail_jindex;
 411         }
 412
 413         if (sdp->sd_args.ar_spectator) {
 414                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 415                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 416         } else {
 417                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 418                         fs_err(sdp, "can't mount journal #%u\n",
 419                                sdp->sd_lockstruct.ls_jid);
 420                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 421                                gfs2_jindex_size(sdp),
 422                                gfs2_jindex_size(sdp) - 1);
 423                         goto fail_jindex;
 424                 }
 425                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 426
 427                 error = gfs2_glock_nq_num(sdp,
 428                                           sdp->sd_lockstruct.ls_jid,
 429                                           &gfs2_journal_glops,
 430                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 431                                           &sdp->sd_journal_gh);
 432                 if (error) {
 433                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 434                         goto fail_jindex;
 435                 }
 436
 437                 error = gfs2_glock_nq_init(sdp->sd_jdesc->jd_inode->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
 523         if (undo)
 524                 goto fail_qinode;
 525
 526         error = gfs2_lookup_master_dir(sdp);
 527         if (error) {
 528                 fs_err(sdp, "can't read in master directory: %d\n", error);
 529                 goto fail;
 530         }
 531
 532         error = init_journal(sdp, undo);
 533         if (error)
 534                 goto fail_master;
 535
 536         /* Read in the master inode number inode */
 537         error = gfs2_lookup_simple(sdp->sd_master_dir, "inum",
 538                                    &sdp->sd_inum_inode);
 539         if (error) {
 540                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 541                 goto fail_journal;
 542         }
 543
 544
 545         /* Read in the master statfs inode */
 546         error = gfs2_lookup_simple(sdp->sd_master_dir, "statfs",
 547                                    &sdp->sd_statfs_inode);
 548         if (error) {
 549                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 550                 goto fail_inum;
 551         }
 552
 553         /* Read in the resource index inode */
 554         error = gfs2_lookup_simple(sdp->sd_master_dir, "rindex",
 555                                    &sdp->sd_rindex);
 556         if (error) {
 557                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 558                 goto fail_statfs;
 559         }
 560         set_bit(GLF_STICKY, &get_v2ip(sdp->sd_rindex)->i_gl->gl_flags);
 561         sdp->sd_rindex_vn = get_v2ip(sdp->sd_rindex)->i_gl->gl_vn - 1;
 562
 563         /* Read in the quota inode */
 564         error = gfs2_lookup_simple(sdp->sd_master_dir, "quota",
 565                                    &sdp->sd_quota_inode);
 566         if (error) {
 567                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 568                 goto fail_rindex;
 569         }
 570         return 0;
 571
 572 fail_qinode:
 573         iput(sdp->sd_quota_inode);
 574
 575 fail_rindex:
 576         gfs2_clear_rgrpd(sdp);
 577         iput(sdp->sd_rindex);
 578
 579 fail_statfs:
 580         iput(sdp->sd_statfs_inode);
 581
 582 fail_inum:
 583         iput(sdp->sd_inum_inode);
 584 fail_journal:
 585         init_journal(sdp, UNDO);
 586 fail_master:
 587         iput(sdp->sd_master_dir);
 588 fail:
 589         return error;
 590 }
 591
 592 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 593 {
 594         struct inode *pn = NULL;
 595         char buf[30];
 596         int error = 0;
 597
 598         if (sdp->sd_args.ar_spectator)
 599                 return 0;
 600
 601         if (undo)
 602                 goto fail_qc_gh;
 603
 604         error = gfs2_lookup_simple(sdp->sd_master_dir, "per_node", &pn);
 605         if (error) {
 606                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 607                 return error;
 608         }
 609
 610         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 611         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ir_inode);
 612         if (error) {
 613                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 614                 goto fail;
 615         }
 616
 617         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 618         error = gfs2_lookup_simple(pn, buf, &sdp->sd_sc_inode);
 619         if (error) {
 620                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 621                 goto fail_ir_i;
 622         }
 623
 624         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 625         error = gfs2_lookup_simple(pn, buf, &sdp->sd_ut_inode);
 626         if (error) {
 627                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 628                 goto fail_sc_i;
 629         }
 630
 631         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 632         error = gfs2_lookup_simple(pn, buf, &sdp->sd_qc_inode);
 633         if (error) {
 634                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 635                 goto fail_ut_i;
 636         }
 637
 638         iput(pn);
 639         pn = NULL;
 640
 641         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_ir_inode)->i_gl,
 642                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 643                                    &sdp->sd_ir_gh);
 644         if (error) {
 645                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 646                 goto fail_qc_i;
 647         }
 648
 649         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_sc_inode)->i_gl,
 650                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 651                                    &sdp->sd_sc_gh);
 652         if (error) {
 653                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 654                 goto fail_ir_gh;
 655         }
 656
 657         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_ut_inode)->i_gl,
 658                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 659                                    &sdp->sd_ut_gh);
 660         if (error) {
 661                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 662                 goto fail_sc_gh;
 663         }
 664
 665         error = gfs2_glock_nq_init(get_v2ip(sdp->sd_qc_inode)->i_gl,
 666                                    LM_ST_EXCLUSIVE, GL_NEVER_RECURSE,
 667                                    &sdp->sd_qc_gh);
 668         if (error) {
 669                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 670                 goto fail_ut_gh;
 671         }
 672
 673         return 0;
 674
 675  fail_qc_gh:
 676         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 677
 678  fail_ut_gh:
 679         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 680
 681  fail_sc_gh:
 682         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 683
 684  fail_ir_gh:
 685         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 686
 687  fail_qc_i:
 688         iput(sdp->sd_qc_inode);
 689
 690  fail_ut_i:
 691         iput(sdp->sd_ut_inode);
 692
 693  fail_sc_i:
 694         iput(sdp->sd_sc_inode);
 695
 696  fail_ir_i:
 697         iput(sdp->sd_ir_inode);
 698
 699  fail:
 700         if (pn)
 701                 iput(pn);
 702         return error;
 703 }
 704
 705 static int init_threads(struct gfs2_sbd *sdp, int undo)
 706 {
 707         struct task_struct *p;
 708         int error = 0;
 709
 710         if (undo)
 711                 goto fail_inoded;
 712
 713         sdp->sd_log_flush_time = jiffies;
 714         sdp->sd_jindex_refresh_time = jiffies;
 715
 716         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 717         error = IS_ERR(p);
 718         if (error) {
 719                 fs_err(sdp, "can't start logd thread: %d\n", error);
 720                 return error;
 721         }
 722         sdp->sd_logd_process = p;
 723
 724         sdp->sd_statfs_sync_time = jiffies;
 725         sdp->sd_quota_sync_time = jiffies;
 726
 727         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 728         error = IS_ERR(p);
 729         if (error) {
 730                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 731                 goto fail;
 732         }
 733         sdp->sd_quotad_process = p;
 734
 735         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 736         error = IS_ERR(p);
 737         if (error) {
 738                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 739                 goto fail_quotad;
 740         }
 741         sdp->sd_inoded_process = p;
 742
 743         return 0;
 744
 745  fail_inoded:
 746         kthread_stop(sdp->sd_inoded_process);
 747
 748  fail_quotad:
 749         kthread_stop(sdp->sd_quotad_process);
 750
 751  fail:
 752         kthread_stop(sdp->sd_logd_process);
 753
 754         return error;
 755 }
 756
 757 /**
 758  * fill_super - Read in superblock
 759  * @sb: The VFS superblock
 760  * @data: Mount options
 761  * @silent: Don't complain if it's not a GFS2 filesystem
 762  *
 763  * Returns: errno
 764  */
 765
 766 static int fill_super(struct super_block *sb, void *data, int silent)
 767 {
 768         struct gfs2_sbd *sdp;
 769         struct gfs2_holder mount_gh;
 770         int error;
 771
 772         sdp = init_sbd(sb);
 773         if (!sdp) {
 774                 printk("GFS2: can't alloc struct gfs2_sbd\n");
 775                 return -ENOMEM;
 776         }
 777
 778         error = gfs2_mount_args(sdp, (char *)data, 0);
 779         if (error) {
 780                 printk("GFS2: can't parse mount arguments\n");
 781                 goto fail;
 782         }
 783
 784         init_vfs(sdp);
 785
 786         error = init_names(sdp, silent);
 787         if (error)
 788                 goto fail;
 789
 790         error = gfs2_sys_fs_add(sdp);
 791         if (error)
 792                 goto fail;
 793
 794         error = gfs2_lm_mount(sdp, silent);
 795         if (error)
 796                 goto fail_sys;
 797
 798         error = init_locking(sdp, &mount_gh, DO);
 799         if (error)
 800                 goto fail_lm;
 801
 802         error = init_sb(sdp, silent, DO);
 803         if (error)
 804                 goto fail_locking;
 805
 806         error = init_inodes(sdp, DO);
 807         if (error)
 808                 goto fail_sb;
 809
 810         error = init_per_node(sdp, DO);
 811         if (error)
 812                 goto fail_inodes;
 813
 814         error = gfs2_statfs_init(sdp);
 815         if (error) {
 816                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 817                 goto fail_per_node;
 818         }
 819
 820         error = init_threads(sdp, DO);
 821         if (error)
 822                 goto fail_per_node;
 823
 824         if (!(sb->s_flags & MS_RDONLY)) {
 825                 error = gfs2_make_fs_rw(sdp);
 826                 if (error) {
 827                         fs_err(sdp, "can't make FS RW: %d\n", error);
 828                         goto fail_threads;
 829                 }
 830         }
 831
 832         gfs2_glock_dq_uninit(&mount_gh);
 833
 834         return 0;
 835
 836  fail_threads:
 837         init_threads(sdp, UNDO);
 838
 839  fail_per_node:
 840         init_per_node(sdp, UNDO);
 841
 842  fail_inodes:
 843         init_inodes(sdp, UNDO);
 844
 845  fail_sb:
 846         init_sb(sdp, 0, UNDO);
 847
 848  fail_locking:
 849         init_locking(sdp, &mount_gh, UNDO);
 850
 851  fail_lm:
 852         gfs2_gl_hash_clear(sdp, WAIT);
 853         gfs2_lm_unmount(sdp);
 854         while (invalidate_inodes(sb))
 855                 yield();
 856
 857  fail_sys:
 858         gfs2_sys_fs_del(sdp);
 859
 860  fail:
 861         vfree(sdp);
 862         set_v2sdp(sb, NULL);
 863
 864         return error;
 865 }
 866
 867 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 868                                        int flags, const char *dev_name,
 869                                        void *data)
 870 {
 871         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 872 }
 873
 874 struct file_system_type gfs2_fs_type = {
 875         .name = "gfs2",
 876         .fs_flags = FS_REQUIRES_DEV,
 877         .get_sb = gfs2_get_sb,
 878         .kill_sb = kill_block_super,
 879         .owner = THIS_MODULE,
 880 };
 881