git.oblomov.eu Git - linux-2.6/blob - fs/gfs2/ops_fstype.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 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
  20 #include "gfs2.h"
  21 #include "lm_interface.h"
  22 #include "incore.h"
  23 #include "daemon.h"
  24 #include "glock.h"
  25 #include "glops.h"
  26 #include "inode.h"
  27 #include "lm.h"
  28 #include "mount.h"
  29 #include "ops_export.h"
  30 #include "ops_fstype.h"
  31 #include "ops_super.h"
  32 #include "recovery.h"
  33 #include "rgrp.h"
  34 #include "super.h"
  35 #include "unlinked.h"
  36 #include "sys.h"
  37 #include "util.h"
  38
  39 #define DO 0
  40 #define UNDO 1
  41
  42 extern struct dentry_operations gfs2_dops;
  43
  44 static struct gfs2_sbd *init_sbd(struct super_block *sb)
  45 {
  46         struct gfs2_sbd *sdp;
  47         unsigned int x;
  48
  49         sdp = vmalloc(sizeof(struct gfs2_sbd));
  50         if (!sdp)
  51                 return NULL;
  52
  53         memset(sdp, 0, sizeof(struct gfs2_sbd));
  54
  55         sb->s_fs_info = sdp;
  56         sdp->sd_vfs = sb;
  57
  58         gfs2_tune_init(&sdp->sd_tune);
  59
  60         for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
  61                 sdp->sd_gl_hash[x].hb_lock = RW_LOCK_UNLOCKED;
  62                 INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
  63         }
  64         INIT_LIST_HEAD(&sdp->sd_reclaim_list);
  65         spin_lock_init(&sdp->sd_reclaim_lock);
  66         init_waitqueue_head(&sdp->sd_reclaim_wq);
  67         mutex_init(&sdp->sd_invalidate_inodes_mutex);
  68
  69         mutex_init(&sdp->sd_inum_mutex);
  70         spin_lock_init(&sdp->sd_statfs_spin);
  71         mutex_init(&sdp->sd_statfs_mutex);
  72
  73         spin_lock_init(&sdp->sd_rindex_spin);
  74         mutex_init(&sdp->sd_rindex_mutex);
  75         INIT_LIST_HEAD(&sdp->sd_rindex_list);
  76         INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
  77         INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
  78
  79         INIT_LIST_HEAD(&sdp->sd_jindex_list);
  80         spin_lock_init(&sdp->sd_jindex_spin);
  81         mutex_init(&sdp->sd_jindex_mutex);
  82
  83         INIT_LIST_HEAD(&sdp->sd_unlinked_list);
  84         spin_lock_init(&sdp->sd_unlinked_spin);
  85         mutex_init(&sdp->sd_unlinked_mutex);
  86
  87         INIT_LIST_HEAD(&sdp->sd_quota_list);
  88         spin_lock_init(&sdp->sd_quota_spin);
  89         mutex_init(&sdp->sd_quota_mutex);
  90
  91         spin_lock_init(&sdp->sd_log_lock);
  92
  93         INIT_LIST_HEAD(&sdp->sd_log_le_gl);
  94         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
  95         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
  96         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
  97         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
  98
  99         mutex_init(&sdp->sd_log_reserve_mutex);
 100         INIT_LIST_HEAD(&sdp->sd_ail1_list);
 101         INIT_LIST_HEAD(&sdp->sd_ail2_list);
 102
 103         init_rwsem(&sdp->sd_log_flush_lock);
 104         INIT_LIST_HEAD(&sdp->sd_log_flush_list);
 105
 106         INIT_LIST_HEAD(&sdp->sd_revoke_list);
 107
 108         mutex_init(&sdp->sd_freeze_lock);
 109
 110         return sdp;
 111 }
 112
 113 static void init_vfs(struct super_block *sb, unsigned noatime)
 114 {
 115         struct gfs2_sbd *sdp = sb->s_fs_info;
 116
 117         sb->s_magic = GFS2_MAGIC;
 118         sb->s_op = &gfs2_super_ops;
 119         sb->s_export_op = &gfs2_export_ops;
 120         sb->s_maxbytes = MAX_LFS_FILESIZE;
 121
 122         if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
 123                 set_bit(noatime, &sdp->sd_flags);
 124
 125         /* Don't let the VFS update atimes.  GFS2 handles this itself. */
 126         sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
 127 }
 128
 129 static int init_names(struct gfs2_sbd *sdp, int silent)
 130 {
 131         struct gfs2_sb *sb = NULL;
 132         char *proto, *table;
 133         int error = 0;
 134
 135         proto = sdp->sd_args.ar_lockproto;
 136         table = sdp->sd_args.ar_locktable;
 137
 138         /*  Try to autodetect  */
 139
 140         if (!proto[0] || !table[0]) {
 141                 struct buffer_head *bh;
 142                 bh = sb_getblk(sdp->sd_vfs,
 143                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 144                 lock_buffer(bh);
 145                 clear_buffer_uptodate(bh);
 146                 clear_buffer_dirty(bh);
 147                 unlock_buffer(bh);
 148                 ll_rw_block(READ, 1, &bh);
 149                 wait_on_buffer(bh);
 150
 151                 if (!buffer_uptodate(bh)) {
 152                         brelse(bh);
 153                         return -EIO;
 154                 }
 155
 156                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
 157                 if (!sb) {
 158                         brelse(bh);
 159                         return -ENOMEM;
 160                 }
 161                 gfs2_sb_in(sb, bh->b_data);
 162                 brelse(bh);
 163
 164                 error = gfs2_check_sb(sdp, sb, silent);
 165                 if (error)
 166                         goto out;
 167
 168                 if (!proto[0])
 169                         proto = sb->sb_lockproto;
 170                 if (!table[0])
 171                         table = sb->sb_locktable;
 172         }
 173
 174         if (!table[0])
 175                 table = sdp->sd_vfs->s_id;
 176
 177         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 178         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 179
 180  out:
 181         kfree(sb);
 182
 183         return error;
 184 }
 185
 186 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 187                         int undo)
 188 {
 189         struct task_struct *p;
 190         int error = 0;
 191
 192         if (undo)
 193                 goto fail_trans;
 194
 195         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
 196         error = IS_ERR(p);
 197         if (error) {
 198                 fs_err(sdp, "can't start scand thread: %d\n", error);
 199                 return error;
 200         }
 201         sdp->sd_scand_process = p;
 202
 203         for (sdp->sd_glockd_num = 0;
 204              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
 205              sdp->sd_glockd_num++) {
 206                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
 207                 error = IS_ERR(p);
 208                 if (error) {
 209                         fs_err(sdp, "can't start glockd thread: %d\n", error);
 210                         goto fail;
 211                 }
 212                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
 213         }
 214
 215         error = gfs2_glock_nq_num(sdp,
 216                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 217                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 218                                   mount_gh);
 219         if (error) {
 220                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 221                 goto fail;
 222         }
 223
 224         error = gfs2_glock_nq_num(sdp,
 225                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 226                                   LM_ST_SHARED,
 227                                   LM_FLAG_NOEXP | GL_EXACT,
 228                                   &sdp->sd_live_gh);
 229         if (error) {
 230                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 231                 goto fail_mount;
 232         }
 233
 234         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 235                                CREATE, &sdp->sd_rename_gl);
 236         if (error) {
 237                 fs_err(sdp, "can't create rename glock: %d\n", error);
 238                 goto fail_live;
 239         }
 240
 241         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 242                                CREATE, &sdp->sd_trans_gl);
 243         if (error) {
 244                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 245                 goto fail_rename;
 246         }
 247         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
 248
 249         return 0;
 250
 251  fail_trans:
 252         gfs2_glock_put(sdp->sd_trans_gl);
 253
 254  fail_rename:
 255         gfs2_glock_put(sdp->sd_rename_gl);
 256
 257  fail_live:
 258         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 259
 260  fail_mount:
 261         gfs2_glock_dq_uninit(mount_gh);
 262
 263  fail:
 264         while (sdp->sd_glockd_num--)
 265                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
 266
 267         kthread_stop(sdp->sd_scand_process);
 268
 269         return error;
 270 }
 271
 272 static struct inode *gfs2_lookup_root(struct gfs2_sbd *sdp,
 273                                       const struct gfs2_inum *inum)
 274 {
 275         int error;
 276         struct gfs2_glock *gl;
 277         struct gfs2_inode *ip;
 278         struct inode *inode;
 279
 280         error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops,
 281                                CREATE, &gl);
 282         if (!error) {
 283                 error = gfs2_inode_get(gl, inum, CREATE, &ip);
 284                 if (!error) {
 285                         gfs2_inode_min_init(ip, DT_DIR);
 286                         inode = gfs2_ip2v(ip);
 287                         gfs2_inode_put(ip);
 288                         gfs2_glock_put(gl);
 289                         return inode;
 290                 }
 291                 gfs2_glock_put(gl);
 292         }
 293         return ERR_PTR(error);
 294 }
 295
 296 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 297 {
 298         struct super_block *sb = sdp->sd_vfs;
 299         struct gfs2_holder sb_gh;
 300         struct gfs2_inum *inum;
 301         struct inode *inode;
 302         int error = 0;
 303
 304         if (undo) {
 305                 return 0;
 306         }
 307
 308         error = gfs2_glock_nq_num(sdp,
 309                                  GFS2_SB_LOCK, &gfs2_meta_glops,
 310                                  LM_ST_SHARED, 0, &sb_gh);
 311         if (error) {
 312                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 313                 return error;
 314         }
 315
 316         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 317         if (error) {
 318                 fs_err(sdp, "can't read superblock: %d\n", error);
 319                 goto out;
 320         }
 321
 322         /* Set up the buffer cache and SB for real */
 323         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 324                 error = -EINVAL;
 325                 fs_err(sdp, "FS block size (%u) is too small for device "
 326                        "block size (%u)\n",
 327                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 328                 goto out;
 329         }
 330         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 331                 error = -EINVAL;
 332                 fs_err(sdp, "FS block size (%u) is too big for machine "
 333                        "page size (%u)\n",
 334                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 335                 goto out;
 336         }
 337
 338         /* Get rid of buffers from the original block size */
 339         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
 340         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
 341
 342         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 343
 344         /* Get the root inode */
 345         inum = &sdp->sd_sb.sb_root_dir;
 346         if (sb->s_type == &gfs2meta_fs_type)
 347                 inum = &sdp->sd_sb.sb_master_dir;
 348         inode = gfs2_lookup_root(sdp, inum);
 349         if (IS_ERR(inode)) {
 350                 error = PTR_ERR(inode);
 351                 fs_err(sdp, "can't read in root inode: %d\n", error);
 352                 goto out;
 353         }
 354
 355         sb->s_root = d_alloc_root(inode);
 356         if (!sb->s_root) {
 357                 fs_err(sdp, "can't get root dentry\n");
 358                 error = -ENOMEM;
 359                 iput(inode);
 360         }
 361         sb->s_root->d_op = &gfs2_dops;
 362 out:
 363         gfs2_glock_dq_uninit(&sb_gh);
 364         return error;
 365 }
 366
 367 static int init_journal(struct gfs2_sbd *sdp, int undo)
 368 {
 369         struct gfs2_holder ji_gh;
 370         struct task_struct *p;
 371         struct gfs2_inode *ip;
 372         int jindex = 1;
 373         int error = 0;
 374
 375         if (undo) {
 376                 jindex = 0;
 377                 goto fail_recoverd;
 378         }
 379
 380         sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
 381         if (IS_ERR(sdp->sd_jindex)) {
 382                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 383                 return PTR_ERR(sdp->sd_jindex);
 384         }
 385         ip = sdp->sd_jindex->u.generic_ip;
 386         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 387
 388         /* Load in the journal index special file */
 389
 390         error = gfs2_jindex_hold(sdp, &ji_gh);
 391         if (error) {
 392                 fs_err(sdp, "can't read journal index: %d\n", error);
 393                 goto fail;
 394         }
 395
 396         error = -EINVAL;
 397         if (!gfs2_jindex_size(sdp)) {
 398                 fs_err(sdp, "no journals!\n");
 399                 goto fail_jindex;
 400         }
 401
 402         if (sdp->sd_args.ar_spectator) {
 403                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 404                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 405         } else {
 406                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 407                         fs_err(sdp, "can't mount journal #%u\n",
 408                                sdp->sd_lockstruct.ls_jid);
 409                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 410                                gfs2_jindex_size(sdp),
 411                                gfs2_jindex_size(sdp) - 1);
 412                         goto fail_jindex;
 413                 }
 414                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 415
 416                 error = gfs2_glock_nq_num(sdp,
 417                                           sdp->sd_lockstruct.ls_jid,
 418                                           &gfs2_journal_glops,
 419                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 420                                           &sdp->sd_journal_gh);
 421                 if (error) {
 422                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 423                         goto fail_jindex;
 424                 }
 425
 426                 ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
 427                 error = gfs2_glock_nq_init(ip->i_gl,
 428                                            LM_ST_SHARED,
 429                                            LM_FLAG_NOEXP | GL_EXACT,
 430                                            &sdp->sd_jinode_gh);
 431                 if (error) {
 432                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 433                                error);
 434                         goto fail_journal_gh;
 435                 }
 436
 437                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 438                 if (error) {
 439                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 440                                sdp->sd_jdesc->jd_jid, error);
 441                         goto fail_jinode_gh;
 442                 }
 443                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 444         }
 445
 446         if (sdp->sd_lockstruct.ls_first) {
 447                 unsigned int x;
 448                 for (x = 0; x < sdp->sd_journals; x++) {
 449                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
 450                         if (error) {
 451                                 fs_err(sdp, "error recovering journal %u: %d\n",
 452                                        x, error);
 453                                 goto fail_jinode_gh;
 454                         }
 455                 }
 456
 457                 gfs2_lm_others_may_mount(sdp);
 458         } else if (!sdp->sd_args.ar_spectator) {
 459                 error = gfs2_recover_journal(sdp->sd_jdesc);
 460                 if (error) {
 461                         fs_err(sdp, "error recovering my journal: %d\n", error);
 462                         goto fail_jinode_gh;
 463                 }
 464         }
 465
 466         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 467         gfs2_glock_dq_uninit(&ji_gh);
 468         jindex = 0;
 469
 470         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 471         error = IS_ERR(p);
 472         if (error) {
 473                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 474                 goto fail_jinode_gh;
 475         }
 476         sdp->sd_recoverd_process = p;
 477
 478         return 0;
 479
 480  fail_recoverd:
 481         kthread_stop(sdp->sd_recoverd_process);
 482
 483  fail_jinode_gh:
 484         if (!sdp->sd_args.ar_spectator)
 485                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 486
 487  fail_journal_gh:
 488         if (!sdp->sd_args.ar_spectator)
 489                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 490
 491  fail_jindex:
 492         gfs2_jindex_free(sdp);
 493         if (jindex)
 494                 gfs2_glock_dq_uninit(&ji_gh);
 495
 496  fail:
 497         iput(sdp->sd_jindex);
 498
 499         return error;
 500 }
 501
 502
 503 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 504 {
 505         int error = 0;
 506         struct gfs2_inode *ip;
 507         struct inode *inode;
 508
 509         if (undo)
 510                 goto fail_qinode;
 511
 512         inode = gfs2_lookup_root(sdp, &sdp->sd_sb.sb_master_dir);
 513         if (IS_ERR(inode)) {
 514                 error = PTR_ERR(inode);
 515                 fs_err(sdp, "can't read in master directory: %d\n", error);
 516                 goto fail;
 517         }
 518         sdp->sd_master_dir = inode;
 519
 520         error = init_journal(sdp, undo);
 521         if (error)
 522                 goto fail_master;
 523
 524         /* Read in the master inode number inode */
 525         sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
 526         if (IS_ERR(sdp->sd_inum_inode)) {
 527                 error = PTR_ERR(sdp->sd_inum_inode);
 528                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 529                 goto fail_journal;
 530         }
 531
 532
 533         /* Read in the master statfs inode */
 534         sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
 535         if (IS_ERR(sdp->sd_statfs_inode)) {
 536                 error = PTR_ERR(sdp->sd_statfs_inode);
 537                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 538                 goto fail_inum;
 539         }
 540
 541         /* Read in the resource index inode */
 542         sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
 543         if (IS_ERR(sdp->sd_rindex)) {
 544                 error = PTR_ERR(sdp->sd_rindex);
 545                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 546                 goto fail_statfs;
 547         }
 548         ip = sdp->sd_rindex->u.generic_ip;
 549         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 550         sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
 551
 552         /* Read in the quota inode */
 553         sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
 554         if (IS_ERR(sdp->sd_quota_inode)) {
 555                 error = PTR_ERR(sdp->sd_quota_inode);
 556                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 557                 goto fail_rindex;
 558         }
 559         return 0;
 560
 561 fail_qinode:
 562         iput(sdp->sd_quota_inode);
 563
 564 fail_rindex:
 565         gfs2_clear_rgrpd(sdp);
 566         iput(sdp->sd_rindex);
 567
 568 fail_statfs:
 569         iput(sdp->sd_statfs_inode);
 570
 571 fail_inum:
 572         iput(sdp->sd_inum_inode);
 573 fail_journal:
 574         init_journal(sdp, UNDO);
 575 fail_master:
 576         iput(sdp->sd_master_dir);
 577 fail:
 578         return error;
 579 }
 580
 581 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 582 {
 583         struct inode *pn = NULL;
 584         char buf[30];
 585         int error = 0;
 586         struct gfs2_inode *ip;
 587
 588         if (sdp->sd_args.ar_spectator)
 589                 return 0;
 590
 591         if (undo)
 592                 goto fail_qc_gh;
 593
 594         pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
 595         if (IS_ERR(pn)) {
 596                 error = PTR_ERR(pn);
 597                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 598                 return error;
 599         }
 600
 601         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 602         sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
 603         if (IS_ERR(sdp->sd_ir_inode)) {
 604                 error = PTR_ERR(sdp->sd_ir_inode);
 605                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 606                 goto fail;
 607         }
 608
 609         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 610         sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
 611         if (IS_ERR(sdp->sd_sc_inode)) {
 612                 error = PTR_ERR(sdp->sd_sc_inode);
 613                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 614                 goto fail_ir_i;
 615         }
 616
 617         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 618         sdp->sd_ut_inode = gfs2_lookup_simple(pn, buf);
 619         if (IS_ERR(sdp->sd_ut_inode)) {
 620                 error = PTR_ERR(sdp->sd_ut_inode);
 621                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 622                 goto fail_sc_i;
 623         }
 624
 625         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 626         sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
 627         if (IS_ERR(sdp->sd_qc_inode)) {
 628                 error = PTR_ERR(sdp->sd_qc_inode);
 629                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 630                 goto fail_ut_i;
 631         }
 632
 633         iput(pn);
 634         pn = NULL;
 635
 636         ip = sdp->sd_ir_inode->u.generic_ip;
 637         error = gfs2_glock_nq_init(ip->i_gl,
 638                                    LM_ST_EXCLUSIVE, 0,
 639                                    &sdp->sd_ir_gh);
 640         if (error) {
 641                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 642                 goto fail_qc_i;
 643         }
 644
 645         ip = sdp->sd_sc_inode->u.generic_ip;
 646         error = gfs2_glock_nq_init(ip->i_gl,
 647                                    LM_ST_EXCLUSIVE, 0,
 648                                    &sdp->sd_sc_gh);
 649         if (error) {
 650                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 651                 goto fail_ir_gh;
 652         }
 653
 654         ip = sdp->sd_ut_inode->u.generic_ip;
 655         error = gfs2_glock_nq_init(ip->i_gl,
 656                                    LM_ST_EXCLUSIVE, 0,
 657                                    &sdp->sd_ut_gh);
 658         if (error) {
 659                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 660                 goto fail_sc_gh;
 661         }
 662
 663         ip = sdp->sd_qc_inode->u.generic_ip;
 664         error = gfs2_glock_nq_init(ip->i_gl,
 665                                    LM_ST_EXCLUSIVE, 0,
 666                                    &sdp->sd_qc_gh);
 667         if (error) {
 668                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 669                 goto fail_ut_gh;
 670         }
 671
 672         return 0;
 673
 674  fail_qc_gh:
 675         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 676
 677  fail_ut_gh:
 678         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 679
 680  fail_sc_gh:
 681         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 682
 683  fail_ir_gh:
 684         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 685
 686  fail_qc_i:
 687         iput(sdp->sd_qc_inode);
 688
 689  fail_ut_i:
 690         iput(sdp->sd_ut_inode);
 691
 692  fail_sc_i:
 693         iput(sdp->sd_sc_inode);
 694
 695  fail_ir_i:
 696         iput(sdp->sd_ir_inode);
 697
 698  fail:
 699         if (pn)
 700                 iput(pn);
 701         return error;
 702 }
 703
 704 static int init_threads(struct gfs2_sbd *sdp, int undo)
 705 {
 706         struct task_struct *p;
 707         int error = 0;
 708
 709         if (undo)
 710                 goto fail_inoded;
 711
 712         sdp->sd_log_flush_time = jiffies;
 713         sdp->sd_jindex_refresh_time = jiffies;
 714
 715         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 716         error = IS_ERR(p);
 717         if (error) {
 718                 fs_err(sdp, "can't start logd thread: %d\n", error);
 719                 return error;
 720         }
 721         sdp->sd_logd_process = p;
 722
 723         sdp->sd_statfs_sync_time = jiffies;
 724         sdp->sd_quota_sync_time = jiffies;
 725
 726         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 727         error = IS_ERR(p);
 728         if (error) {
 729                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 730                 goto fail;
 731         }
 732         sdp->sd_quotad_process = p;
 733
 734         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 735         error = IS_ERR(p);
 736         if (error) {
 737                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 738                 goto fail_quotad;
 739         }
 740         sdp->sd_inoded_process = p;
 741
 742         return 0;
 743
 744  fail_inoded:
 745         kthread_stop(sdp->sd_inoded_process);
 746
 747  fail_quotad:
 748         kthread_stop(sdp->sd_quotad_process);
 749
 750  fail:
 751         kthread_stop(sdp->sd_logd_process);
 752
 753         return error;
 754 }
 755
 756 /**
 757  * fill_super - Read in superblock
 758  * @sb: The VFS superblock
 759  * @data: Mount options
 760  * @silent: Don't complain if it's not a GFS2 filesystem
 761  *
 762  * Returns: errno
 763  */
 764
 765 static int fill_super(struct super_block *sb, void *data, int silent)
 766 {
 767         struct gfs2_sbd *sdp;
 768         struct gfs2_holder mount_gh;
 769         int error;
 770
 771         sdp = init_sbd(sb);
 772         if (!sdp) {
 773                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 774                 return -ENOMEM;
 775         }
 776
 777         error = gfs2_mount_args(sdp, (char *)data, 0);
 778         if (error) {
 779                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 780                 goto fail;
 781         }
 782
 783         init_vfs(sb, SDF_NOATIME);
 784
 785         /* Set up the buffer cache and fill in some fake block size values
 786            to allow us to read-in the on-disk superblock. */
 787         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
 788         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
 789         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 790                                GFS2_BASIC_BLOCK_SHIFT;
 791         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 792
 793         error = init_names(sdp, silent);
 794         if (error)
 795                 goto fail;
 796
 797         error = gfs2_sys_fs_add(sdp);
 798         if (error)
 799                 goto fail;
 800
 801         error = gfs2_lm_mount(sdp, silent);
 802         if (error)
 803                 goto fail_sys;
 804
 805         error = init_locking(sdp, &mount_gh, DO);
 806         if (error)
 807                 goto fail_lm;
 808
 809         error = init_sb(sdp, silent, DO);
 810         if (error)
 811                 goto fail_locking;
 812
 813         error = init_inodes(sdp, DO);
 814         if (error)
 815                 goto fail_sb;
 816
 817         error = init_per_node(sdp, DO);
 818         if (error)
 819                 goto fail_inodes;
 820
 821         error = gfs2_statfs_init(sdp);
 822         if (error) {
 823                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 824                 goto fail_per_node;
 825         }
 826
 827         error = init_threads(sdp, DO);
 828         if (error)
 829                 goto fail_per_node;
 830
 831         if (!(sb->s_flags & MS_RDONLY)) {
 832                 error = gfs2_make_fs_rw(sdp);
 833                 if (error) {
 834                         fs_err(sdp, "can't make FS RW: %d\n", error);
 835                         goto fail_threads;
 836                 }
 837         }
 838
 839         gfs2_glock_dq_uninit(&mount_gh);
 840
 841         return 0;
 842
 843  fail_threads:
 844         init_threads(sdp, UNDO);
 845
 846  fail_per_node:
 847         init_per_node(sdp, UNDO);
 848
 849  fail_inodes:
 850         init_inodes(sdp, UNDO);
 851
 852  fail_sb:
 853         init_sb(sdp, 0, UNDO);
 854
 855  fail_locking:
 856         init_locking(sdp, &mount_gh, UNDO);
 857
 858  fail_lm:
 859         gfs2_gl_hash_clear(sdp, WAIT);
 860         gfs2_lm_unmount(sdp);
 861         while (invalidate_inodes(sb))
 862                 yield();
 863
 864  fail_sys:
 865         gfs2_sys_fs_del(sdp);
 866
 867  fail:
 868         vfree(sdp);
 869         sb->s_fs_info = NULL;
 870
 871         return error;
 872 }
 873
 874 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 875                                        int flags, const char *dev_name,
 876                                        void *data)
 877 {
 878         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 879 }
 880
 881 static void gfs2_kill_sb(struct super_block *sb)
 882 {
 883         kill_block_super(sb);
 884 }
 885
 886 struct file_system_type gfs2_fs_type = {
 887         .name = "gfs2",
 888         .fs_flags = FS_REQUIRES_DEV,
 889         .get_sb = gfs2_get_sb,
 890         .kill_sb = gfs2_kill_sb,
 891         .owner = THIS_MODULE,
 892 };
 893
 894 struct file_system_type gfs2meta_fs_type = {
 895         .name = "gfs2meta",
 896         .fs_flags = FS_REQUIRES_DEV,
 897         .get_sb = gfs2_get_sb,
 898         .kill_sb = gfs2_kill_sb,
 899         .owner = THIS_MODULE,
 900 };
 901