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
  92         INIT_LIST_HEAD(&sdp->sd_log_le_gl);
  93         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
  94         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
  95         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
  96         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
  97
  98         mutex_init(&sdp->sd_log_reserve_mutex);
  99         INIT_LIST_HEAD(&sdp->sd_ail1_list);
 100         INIT_LIST_HEAD(&sdp->sd_ail2_list);
 101
 102         init_rwsem(&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         mutex_init(&sdp->sd_freeze_lock);
 108
 109         return sdp;
 110 }
 111
 112 static void init_vfs(struct super_block *sb, unsigned noatime)
 113 {
 114         struct gfs2_sbd *sdp = sb->s_fs_info;
 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(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
 128 static int init_names(struct gfs2_sbd *sdp, int silent)
 129 {
 130         struct gfs2_sb *sb = NULL;
 131         char *proto, *table;
 132         int error = 0;
 133
 134         proto = sdp->sd_args.ar_lockproto;
 135         table = sdp->sd_args.ar_locktable;
 136
 137         /*  Try to autodetect  */
 138
 139         if (!proto[0] || !table[0]) {
 140                 struct buffer_head *bh;
 141                 bh = sb_getblk(sdp->sd_vfs,
 142                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 143                 lock_buffer(bh);
 144                 clear_buffer_uptodate(bh);
 145                 clear_buffer_dirty(bh);
 146                 unlock_buffer(bh);
 147                 ll_rw_block(READ, 1, &bh);
 148                 wait_on_buffer(bh);
 149
 150                 if (!buffer_uptodate(bh)) {
 151                         brelse(bh);
 152                         return -EIO;
 153                 }
 154
 155                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
 156                 if (!sb) {
 157                         brelse(bh);
 158                         return -ENOMEM;
 159                 }
 160                 gfs2_sb_in(sb, bh->b_data);
 161                 brelse(bh);
 162
 163                 error = gfs2_check_sb(sdp, sb, silent);
 164                 if (error)
 165                         goto out;
 166
 167                 if (!proto[0])
 168                         proto = sb->sb_lockproto;
 169                 if (!table[0])
 170                         table = sb->sb_locktable;
 171         }
 172
 173         if (!table[0])
 174                 table = sdp->sd_vfs->s_id;
 175
 176         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 177         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 178
 179  out:
 180         kfree(sb);
 181
 182         return error;
 183 }
 184
 185 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 186                         int undo)
 187 {
 188         struct task_struct *p;
 189         int error = 0;
 190
 191         if (undo)
 192                 goto fail_trans;
 193
 194         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
 195         error = IS_ERR(p);
 196         if (error) {
 197                 fs_err(sdp, "can't start scand thread: %d\n", error);
 198                 return error;
 199         }
 200         sdp->sd_scand_process = p;
 201
 202         for (sdp->sd_glockd_num = 0;
 203              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
 204              sdp->sd_glockd_num++) {
 205                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
 206                 error = IS_ERR(p);
 207                 if (error) {
 208                         fs_err(sdp, "can't start glockd thread: %d\n", error);
 209                         goto fail;
 210                 }
 211                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
 212         }
 213
 214         error = gfs2_glock_nq_num(sdp,
 215                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 216                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 217                                   mount_gh);
 218         if (error) {
 219                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 220                 goto fail;
 221         }
 222
 223         error = gfs2_glock_nq_num(sdp,
 224                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 225                                   LM_ST_SHARED,
 226                                   LM_FLAG_NOEXP | GL_EXACT,
 227                                   &sdp->sd_live_gh);
 228         if (error) {
 229                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 230                 goto fail_mount;
 231         }
 232
 233         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 234                                CREATE, &sdp->sd_rename_gl);
 235         if (error) {
 236                 fs_err(sdp, "can't create rename glock: %d\n", error);
 237                 goto fail_live;
 238         }
 239
 240         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 241                                CREATE, &sdp->sd_trans_gl);
 242         if (error) {
 243                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 244                 goto fail_rename;
 245         }
 246         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
 247
 248         return 0;
 249
 250  fail_trans:
 251         gfs2_glock_put(sdp->sd_trans_gl);
 252
 253  fail_rename:
 254         gfs2_glock_put(sdp->sd_rename_gl);
 255
 256  fail_live:
 257         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 258
 259  fail_mount:
 260         gfs2_glock_dq_uninit(mount_gh);
 261
 262  fail:
 263         while (sdp->sd_glockd_num--)
 264                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
 265
 266         kthread_stop(sdp->sd_scand_process);
 267
 268         return error;
 269 }
 270
 271 static struct inode *gfs2_lookup_root(struct gfs2_sbd *sdp,
 272                                       const struct gfs2_inum *inum)
 273 {
 274         int error;
 275         struct gfs2_glock *gl;
 276         struct gfs2_inode *ip;
 277         struct inode *inode;
 278
 279         error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops,
 280                                CREATE, &gl);
 281         if (!error) {
 282                 error = gfs2_inode_get(gl, inum, CREATE, &ip);
 283                 if (!error) {
 284                         gfs2_inode_min_init(ip, DT_DIR);
 285                         inode = gfs2_ip2v(ip);
 286                         gfs2_inode_put(ip);
 287                         gfs2_glock_put(gl);
 288                         return inode;
 289                 }
 290                 gfs2_glock_put(gl);
 291         }
 292         return ERR_PTR(error);
 293 }
 294
 295 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 296 {
 297         struct super_block *sb = sdp->sd_vfs;
 298         struct gfs2_holder sb_gh;
 299         struct gfs2_inum *inum;
 300         struct inode *inode;
 301         int error = 0;
 302
 303         if (undo) {
 304                 return 0;
 305         }
 306
 307         error = gfs2_glock_nq_num(sdp,
 308                                  GFS2_SB_LOCK, &gfs2_meta_glops,
 309                                  LM_ST_SHARED, 0, &sb_gh);
 310         if (error) {
 311                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 312                 return error;
 313         }
 314
 315         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 316         if (error) {
 317                 fs_err(sdp, "can't read superblock: %d\n", error);
 318                 goto out;
 319         }
 320
 321         /* Set up the buffer cache and SB for real */
 322         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 323                 error = -EINVAL;
 324                 fs_err(sdp, "FS block size (%u) is too small for device "
 325                        "block size (%u)\n",
 326                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 327                 goto out;
 328         }
 329         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 330                 error = -EINVAL;
 331                 fs_err(sdp, "FS block size (%u) is too big for machine "
 332                        "page size (%u)\n",
 333                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 334                 goto out;
 335         }
 336
 337         /* Get rid of buffers from the original block size */
 338         sb_gh.gh_gl->gl_ops->go_inval(sb_gh.gh_gl, DIO_METADATA | DIO_DATA);
 339         sb_gh.gh_gl->gl_aspace->i_blkbits = sdp->sd_sb.sb_bsize_shift;
 340
 341         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 342
 343         /* Get the root inode */
 344         inum = &sdp->sd_sb.sb_root_dir;
 345         if (sb->s_type == &gfs2meta_fs_type)
 346                 inum = &sdp->sd_sb.sb_master_dir;
 347         inode = gfs2_lookup_root(sdp, inum);
 348         if (IS_ERR(inode)) {
 349                 error = PTR_ERR(inode);
 350                 fs_err(sdp, "can't read in root inode: %d\n", error);
 351                 goto out;
 352         }
 353
 354         sb->s_root = d_alloc_root(inode);
 355         if (!sb->s_root) {
 356                 fs_err(sdp, "can't get root dentry\n");
 357                 error = -ENOMEM;
 358                 iput(inode);
 359         }
 360 out:
 361         gfs2_glock_dq_uninit(&sb_gh);
 362         return error;
 363 }
 364
 365 static int init_journal(struct gfs2_sbd *sdp, int undo)
 366 {
 367         struct gfs2_holder ji_gh;
 368         struct task_struct *p;
 369         struct gfs2_inode *ip;
 370         int jindex = 1;
 371         int error = 0;
 372
 373         if (undo) {
 374                 jindex = 0;
 375                 goto fail_recoverd;
 376         }
 377
 378         sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
 379         if (IS_ERR(sdp->sd_jindex)) {
 380                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 381                 return PTR_ERR(sdp->sd_jindex);
 382         }
 383         ip = sdp->sd_jindex->u.generic_ip;
 384         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 385
 386         /* Load in the journal index special file */
 387
 388         error = gfs2_jindex_hold(sdp, &ji_gh);
 389         if (error) {
 390                 fs_err(sdp, "can't read journal index: %d\n", error);
 391                 goto fail;
 392         }
 393
 394         error = -EINVAL;
 395         if (!gfs2_jindex_size(sdp)) {
 396                 fs_err(sdp, "no journals!\n");
 397                 goto fail_jindex;
 398         }
 399
 400         if (sdp->sd_args.ar_spectator) {
 401                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 402                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 403         } else {
 404                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 405                         fs_err(sdp, "can't mount journal #%u\n",
 406                                sdp->sd_lockstruct.ls_jid);
 407                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 408                                gfs2_jindex_size(sdp),
 409                                gfs2_jindex_size(sdp) - 1);
 410                         goto fail_jindex;
 411                 }
 412                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 413
 414                 error = gfs2_glock_nq_num(sdp,
 415                                           sdp->sd_lockstruct.ls_jid,
 416                                           &gfs2_journal_glops,
 417                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 418                                           &sdp->sd_journal_gh);
 419                 if (error) {
 420                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 421                         goto fail_jindex;
 422                 }
 423
 424                 ip = sdp->sd_jdesc->jd_inode->u.generic_ip;
 425                 error = gfs2_glock_nq_init(ip->i_gl,
 426                                            LM_ST_SHARED,
 427                                            LM_FLAG_NOEXP | GL_EXACT,
 428                                            &sdp->sd_jinode_gh);
 429                 if (error) {
 430                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 431                                error);
 432                         goto fail_journal_gh;
 433                 }
 434
 435                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 436                 if (error) {
 437                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 438                                sdp->sd_jdesc->jd_jid, error);
 439                         goto fail_jinode_gh;
 440                 }
 441                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 442         }
 443
 444         if (sdp->sd_lockstruct.ls_first) {
 445                 unsigned int x;
 446                 for (x = 0; x < sdp->sd_journals; x++) {
 447                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
 448                         if (error) {
 449                                 fs_err(sdp, "error recovering journal %u: %d\n",
 450                                        x, error);
 451                                 goto fail_jinode_gh;
 452                         }
 453                 }
 454
 455                 gfs2_lm_others_may_mount(sdp);
 456         } else if (!sdp->sd_args.ar_spectator) {
 457                 error = gfs2_recover_journal(sdp->sd_jdesc);
 458                 if (error) {
 459                         fs_err(sdp, "error recovering my journal: %d\n", error);
 460                         goto fail_jinode_gh;
 461                 }
 462         }
 463
 464         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 465         gfs2_glock_dq_uninit(&ji_gh);
 466         jindex = 0;
 467
 468         /* Disown my Journal glock */
 469
 470         sdp->sd_journal_gh.gh_owner = NULL;
 471         sdp->sd_jinode_gh.gh_owner = NULL;
 472
 473         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 474         error = IS_ERR(p);
 475         if (error) {
 476                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 477                 goto fail_jinode_gh;
 478         }
 479         sdp->sd_recoverd_process = p;
 480
 481         return 0;
 482
 483  fail_recoverd:
 484         kthread_stop(sdp->sd_recoverd_process);
 485
 486  fail_jinode_gh:
 487         if (!sdp->sd_args.ar_spectator)
 488                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 489
 490  fail_journal_gh:
 491         if (!sdp->sd_args.ar_spectator)
 492                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 493
 494  fail_jindex:
 495         gfs2_jindex_free(sdp);
 496         if (jindex)
 497                 gfs2_glock_dq_uninit(&ji_gh);
 498
 499  fail:
 500         iput(sdp->sd_jindex);
 501
 502         return error;
 503 }
 504
 505
 506 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 507 {
 508         int error = 0;
 509         struct gfs2_inode *ip;
 510         struct inode *inode;
 511
 512         if (undo)
 513                 goto fail_qinode;
 514
 515         inode = gfs2_lookup_root(sdp, &sdp->sd_sb.sb_master_dir);
 516         if (IS_ERR(inode)) {
 517                 error = PTR_ERR(inode);
 518                 fs_err(sdp, "can't read in master directory: %d\n", error);
 519                 goto fail;
 520         }
 521         sdp->sd_master_dir = inode;
 522
 523         error = init_journal(sdp, undo);
 524         if (error)
 525                 goto fail_master;
 526
 527         /* Read in the master inode number inode */
 528         sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
 529         if (IS_ERR(sdp->sd_inum_inode)) {
 530                 error = PTR_ERR(sdp->sd_inum_inode);
 531                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 532                 goto fail_journal;
 533         }
 534
 535
 536         /* Read in the master statfs inode */
 537         sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
 538         if (IS_ERR(sdp->sd_statfs_inode)) {
 539                 error = PTR_ERR(sdp->sd_statfs_inode);
 540                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 541                 goto fail_inum;
 542         }
 543
 544         /* Read in the resource index inode */
 545         sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
 546         if (IS_ERR(sdp->sd_rindex)) {
 547                 error = PTR_ERR(sdp->sd_rindex);
 548                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 549                 goto fail_statfs;
 550         }
 551         ip = sdp->sd_rindex->u.generic_ip;
 552         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 553         sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
 554
 555         /* Read in the quota inode */
 556         sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
 557         if (IS_ERR(sdp->sd_quota_inode)) {
 558                 error = PTR_ERR(sdp->sd_quota_inode);
 559                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 560                 goto fail_rindex;
 561         }
 562         return 0;
 563
 564 fail_qinode:
 565         iput(sdp->sd_quota_inode);
 566
 567 fail_rindex:
 568         gfs2_clear_rgrpd(sdp);
 569         iput(sdp->sd_rindex);
 570
 571 fail_statfs:
 572         iput(sdp->sd_statfs_inode);
 573
 574 fail_inum:
 575         iput(sdp->sd_inum_inode);
 576 fail_journal:
 577         init_journal(sdp, UNDO);
 578 fail_master:
 579         iput(sdp->sd_master_dir);
 580 fail:
 581         return error;
 582 }
 583
 584 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 585 {
 586         struct inode *pn = NULL;
 587         char buf[30];
 588         int error = 0;
 589         struct gfs2_inode *ip;
 590
 591         if (sdp->sd_args.ar_spectator)
 592                 return 0;
 593
 594         if (undo)
 595                 goto fail_qc_gh;
 596
 597         pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
 598         if (IS_ERR(pn)) {
 599                 error = PTR_ERR(pn);
 600                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 601                 return error;
 602         }
 603
 604         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 605         sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
 606         if (IS_ERR(sdp->sd_ir_inode)) {
 607                 error = PTR_ERR(sdp->sd_ir_inode);
 608                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 609                 goto fail;
 610         }
 611
 612         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 613         sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
 614         if (IS_ERR(sdp->sd_sc_inode)) {
 615                 error = PTR_ERR(sdp->sd_sc_inode);
 616                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 617                 goto fail_ir_i;
 618         }
 619
 620         sprintf(buf, "unlinked_tag%u", sdp->sd_jdesc->jd_jid);
 621         sdp->sd_ut_inode = gfs2_lookup_simple(pn, buf);
 622         if (IS_ERR(sdp->sd_ut_inode)) {
 623                 error = PTR_ERR(sdp->sd_ut_inode);
 624                 fs_err(sdp, "can't find local \"ut\" file: %d\n", error);
 625                 goto fail_sc_i;
 626         }
 627
 628         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 629         sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
 630         if (IS_ERR(sdp->sd_qc_inode)) {
 631                 error = PTR_ERR(sdp->sd_qc_inode);
 632                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 633                 goto fail_ut_i;
 634         }
 635
 636         iput(pn);
 637         pn = NULL;
 638
 639         ip = sdp->sd_ir_inode->u.generic_ip;
 640         error = gfs2_glock_nq_init(ip->i_gl,
 641                                    LM_ST_EXCLUSIVE, 0,
 642                                    &sdp->sd_ir_gh);
 643         if (error) {
 644                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 645                 goto fail_qc_i;
 646         }
 647
 648         ip = sdp->sd_sc_inode->u.generic_ip;
 649         error = gfs2_glock_nq_init(ip->i_gl,
 650                                    LM_ST_EXCLUSIVE, 0,
 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         ip = sdp->sd_ut_inode->u.generic_ip;
 658         error = gfs2_glock_nq_init(ip->i_gl,
 659                                    LM_ST_EXCLUSIVE, 0,
 660                                    &sdp->sd_ut_gh);
 661         if (error) {
 662                 fs_err(sdp, "can't lock local \"ut\" file: %d\n", error);
 663                 goto fail_sc_gh;
 664         }
 665
 666         ip = sdp->sd_qc_inode->u.generic_ip;
 667         error = gfs2_glock_nq_init(ip->i_gl,
 668                                    LM_ST_EXCLUSIVE, 0,
 669                                    &sdp->sd_qc_gh);
 670         if (error) {
 671                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 672                 goto fail_ut_gh;
 673         }
 674
 675         return 0;
 676
 677  fail_qc_gh:
 678         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 679
 680  fail_ut_gh:
 681         gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
 682
 683  fail_sc_gh:
 684         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 685
 686  fail_ir_gh:
 687         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 688
 689  fail_qc_i:
 690         iput(sdp->sd_qc_inode);
 691
 692  fail_ut_i:
 693         iput(sdp->sd_ut_inode);
 694
 695  fail_sc_i:
 696         iput(sdp->sd_sc_inode);
 697
 698  fail_ir_i:
 699         iput(sdp->sd_ir_inode);
 700
 701  fail:
 702         if (pn)
 703                 iput(pn);
 704         return error;
 705 }
 706
 707 static int init_threads(struct gfs2_sbd *sdp, int undo)
 708 {
 709         struct task_struct *p;
 710         int error = 0;
 711
 712         if (undo)
 713                 goto fail_inoded;
 714
 715         sdp->sd_log_flush_time = jiffies;
 716         sdp->sd_jindex_refresh_time = jiffies;
 717
 718         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 719         error = IS_ERR(p);
 720         if (error) {
 721                 fs_err(sdp, "can't start logd thread: %d\n", error);
 722                 return error;
 723         }
 724         sdp->sd_logd_process = p;
 725
 726         sdp->sd_statfs_sync_time = jiffies;
 727         sdp->sd_quota_sync_time = jiffies;
 728
 729         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 730         error = IS_ERR(p);
 731         if (error) {
 732                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 733                 goto fail;
 734         }
 735         sdp->sd_quotad_process = p;
 736
 737         p = kthread_run(gfs2_inoded, sdp, "gfs2_inoded");
 738         error = IS_ERR(p);
 739         if (error) {
 740                 fs_err(sdp, "can't start inoded thread: %d\n", error);
 741                 goto fail_quotad;
 742         }
 743         sdp->sd_inoded_process = p;
 744
 745         return 0;
 746
 747  fail_inoded:
 748         kthread_stop(sdp->sd_inoded_process);
 749
 750  fail_quotad:
 751         kthread_stop(sdp->sd_quotad_process);
 752
 753  fail:
 754         kthread_stop(sdp->sd_logd_process);
 755
 756         return error;
 757 }
 758
 759 /**
 760  * fill_super - Read in superblock
 761  * @sb: The VFS superblock
 762  * @data: Mount options
 763  * @silent: Don't complain if it's not a GFS2 filesystem
 764  *
 765  * Returns: errno
 766  */
 767
 768 static int fill_super(struct super_block *sb, void *data, int silent)
 769 {
 770         struct gfs2_sbd *sdp;
 771         struct gfs2_holder mount_gh;
 772         int error;
 773
 774         sdp = init_sbd(sb);
 775         if (!sdp) {
 776                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 777                 return -ENOMEM;
 778         }
 779
 780         error = gfs2_mount_args(sdp, (char *)data, 0);
 781         if (error) {
 782                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 783                 goto fail;
 784         }
 785
 786         init_vfs(sb, SDF_NOATIME);
 787
 788         /* Set up the buffer cache and fill in some fake block size values
 789            to allow us to read-in the on-disk superblock. */
 790         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
 791         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
 792         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 793                                GFS2_BASIC_BLOCK_SHIFT;
 794         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 795
 796         error = init_names(sdp, silent);
 797         if (error)
 798                 goto fail;
 799
 800         error = gfs2_sys_fs_add(sdp);
 801         if (error)
 802                 goto fail;
 803
 804         error = gfs2_lm_mount(sdp, silent);
 805         if (error)
 806                 goto fail_sys;
 807
 808         error = init_locking(sdp, &mount_gh, DO);
 809         if (error)
 810                 goto fail_lm;
 811
 812         error = init_sb(sdp, silent, DO);
 813         if (error)
 814                 goto fail_locking;
 815
 816         error = init_inodes(sdp, DO);
 817         if (error)
 818                 goto fail_sb;
 819
 820         error = init_per_node(sdp, DO);
 821         if (error)
 822                 goto fail_inodes;
 823
 824         error = gfs2_statfs_init(sdp);
 825         if (error) {
 826                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 827                 goto fail_per_node;
 828         }
 829
 830         error = init_threads(sdp, DO);
 831         if (error)
 832                 goto fail_per_node;
 833
 834         if (!(sb->s_flags & MS_RDONLY)) {
 835                 error = gfs2_make_fs_rw(sdp);
 836                 if (error) {
 837                         fs_err(sdp, "can't make FS RW: %d\n", error);
 838                         goto fail_threads;
 839                 }
 840         }
 841
 842         gfs2_glock_dq_uninit(&mount_gh);
 843
 844         return 0;
 845
 846  fail_threads:
 847         init_threads(sdp, UNDO);
 848
 849  fail_per_node:
 850         init_per_node(sdp, UNDO);
 851
 852  fail_inodes:
 853         init_inodes(sdp, UNDO);
 854
 855  fail_sb:
 856         init_sb(sdp, 0, UNDO);
 857
 858  fail_locking:
 859         init_locking(sdp, &mount_gh, UNDO);
 860
 861  fail_lm:
 862         gfs2_gl_hash_clear(sdp, WAIT);
 863         gfs2_lm_unmount(sdp);
 864         while (invalidate_inodes(sb))
 865                 yield();
 866
 867  fail_sys:
 868         gfs2_sys_fs_del(sdp);
 869
 870  fail:
 871         vfree(sdp);
 872         sb->s_fs_info = NULL;
 873
 874         return error;
 875 }
 876
 877 static struct super_block *gfs2_get_sb(struct file_system_type *fs_type,
 878                                        int flags, const char *dev_name,
 879                                        void *data)
 880 {
 881         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super);
 882 }
 883
 884 static void gfs2_kill_sb(struct super_block *sb)
 885 {
 886         kill_block_super(sb);
 887 }
 888
 889 struct file_system_type gfs2_fs_type = {
 890         .name = "gfs2",
 891         .fs_flags = FS_REQUIRES_DEV,
 892         .get_sb = gfs2_get_sb,
 893         .kill_sb = gfs2_kill_sb,
 894         .owner = THIS_MODULE,
 895 };
 896
 897 struct file_system_type gfs2meta_fs_type = {
 898         .name = "gfs2meta",
 899         .fs_flags = FS_REQUIRES_DEV,
 900         .get_sb = gfs2_get_sb,
 901         .kill_sb = gfs2_kill_sb,
 902         .owner = THIS_MODULE,
 903 };
 904