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 "sys.h"
  36 #include "util.h"
  37
  38 #define DO 0
  39 #define UNDO 1
  40
  41 extern struct dentry_operations gfs2_dops;
  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                 rwlock_init(&sdp->sd_gl_hash[x].hb_lock);
  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
  67         mutex_init(&sdp->sd_inum_mutex);
  68         spin_lock_init(&sdp->sd_statfs_spin);
  69         mutex_init(&sdp->sd_statfs_mutex);
  70
  71         spin_lock_init(&sdp->sd_rindex_spin);
  72         mutex_init(&sdp->sd_rindex_mutex);
  73         INIT_LIST_HEAD(&sdp->sd_rindex_list);
  74         INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
  75         INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
  76
  77         INIT_LIST_HEAD(&sdp->sd_jindex_list);
  78         spin_lock_init(&sdp->sd_jindex_spin);
  79         mutex_init(&sdp->sd_jindex_mutex);
  80
  81         INIT_LIST_HEAD(&sdp->sd_quota_list);
  82         spin_lock_init(&sdp->sd_quota_spin);
  83         mutex_init(&sdp->sd_quota_mutex);
  84
  85         spin_lock_init(&sdp->sd_log_lock);
  86
  87         INIT_LIST_HEAD(&sdp->sd_log_le_gl);
  88         INIT_LIST_HEAD(&sdp->sd_log_le_buf);
  89         INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
  90         INIT_LIST_HEAD(&sdp->sd_log_le_rg);
  91         INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
  92
  93         mutex_init(&sdp->sd_log_reserve_mutex);
  94         INIT_LIST_HEAD(&sdp->sd_ail1_list);
  95         INIT_LIST_HEAD(&sdp->sd_ail2_list);
  96
  97         init_rwsem(&sdp->sd_log_flush_lock);
  98         INIT_LIST_HEAD(&sdp->sd_log_flush_list);
  99
 100         INIT_LIST_HEAD(&sdp->sd_revoke_list);
 101
 102         mutex_init(&sdp->sd_freeze_lock);
 103
 104         return sdp;
 105 }
 106
 107 static void init_vfs(struct super_block *sb, unsigned noatime)
 108 {
 109         struct gfs2_sbd *sdp = sb->s_fs_info;
 110
 111         sb->s_magic = GFS2_MAGIC;
 112         sb->s_op = &gfs2_super_ops;
 113         sb->s_export_op = &gfs2_export_ops;
 114         sb->s_maxbytes = MAX_LFS_FILESIZE;
 115
 116         if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
 117                 set_bit(noatime, &sdp->sd_flags);
 118
 119         /* Don't let the VFS update atimes.  GFS2 handles this itself. */
 120         sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
 121 }
 122
 123 static int init_names(struct gfs2_sbd *sdp, int silent)
 124 {
 125         struct gfs2_sb *sb = NULL;
 126         char *proto, *table;
 127         int error = 0;
 128
 129         proto = sdp->sd_args.ar_lockproto;
 130         table = sdp->sd_args.ar_locktable;
 131
 132         /*  Try to autodetect  */
 133
 134         if (!proto[0] || !table[0]) {
 135                 struct buffer_head *bh;
 136                 bh = sb_getblk(sdp->sd_vfs,
 137                                GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
 138                 lock_buffer(bh);
 139                 clear_buffer_uptodate(bh);
 140                 clear_buffer_dirty(bh);
 141                 unlock_buffer(bh);
 142                 ll_rw_block(READ, 1, &bh);
 143                 wait_on_buffer(bh);
 144
 145                 if (!buffer_uptodate(bh)) {
 146                         brelse(bh);
 147                         return -EIO;
 148                 }
 149
 150                 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
 151                 if (!sb) {
 152                         brelse(bh);
 153                         return -ENOMEM;
 154                 }
 155                 gfs2_sb_in(sb, bh->b_data);
 156                 brelse(bh);
 157
 158                 error = gfs2_check_sb(sdp, sb, silent);
 159                 if (error)
 160                         goto out;
 161
 162                 if (!proto[0])
 163                         proto = sb->sb_lockproto;
 164                 if (!table[0])
 165                         table = sb->sb_locktable;
 166         }
 167
 168         if (!table[0])
 169                 table = sdp->sd_vfs->s_id;
 170
 171         snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 172         snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 173
 174  out:
 175         kfree(sb);
 176
 177         return error;
 178 }
 179
 180 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
 181                         int undo)
 182 {
 183         struct task_struct *p;
 184         int error = 0;
 185
 186         if (undo)
 187                 goto fail_trans;
 188
 189         p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
 190         error = IS_ERR(p);
 191         if (error) {
 192                 fs_err(sdp, "can't start scand thread: %d\n", error);
 193                 return error;
 194         }
 195         sdp->sd_scand_process = p;
 196
 197         for (sdp->sd_glockd_num = 0;
 198              sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
 199              sdp->sd_glockd_num++) {
 200                 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
 201                 error = IS_ERR(p);
 202                 if (error) {
 203                         fs_err(sdp, "can't start glockd thread: %d\n", error);
 204                         goto fail;
 205                 }
 206                 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
 207         }
 208
 209         error = gfs2_glock_nq_num(sdp,
 210                                   GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
 211                                   LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
 212                                   mount_gh);
 213         if (error) {
 214                 fs_err(sdp, "can't acquire mount glock: %d\n", error);
 215                 goto fail;
 216         }
 217
 218         error = gfs2_glock_nq_num(sdp,
 219                                   GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
 220                                   LM_ST_SHARED,
 221                                   LM_FLAG_NOEXP | GL_EXACT,
 222                                   &sdp->sd_live_gh);
 223         if (error) {
 224                 fs_err(sdp, "can't acquire live glock: %d\n", error);
 225                 goto fail_mount;
 226         }
 227
 228         error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
 229                                CREATE, &sdp->sd_rename_gl);
 230         if (error) {
 231                 fs_err(sdp, "can't create rename glock: %d\n", error);
 232                 goto fail_live;
 233         }
 234
 235         error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
 236                                CREATE, &sdp->sd_trans_gl);
 237         if (error) {
 238                 fs_err(sdp, "can't create transaction glock: %d\n", error);
 239                 goto fail_rename;
 240         }
 241         set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
 242
 243         return 0;
 244
 245 fail_trans:
 246         gfs2_glock_put(sdp->sd_trans_gl);
 247
 248 fail_rename:
 249         gfs2_glock_put(sdp->sd_rename_gl);
 250
 251 fail_live:
 252         gfs2_glock_dq_uninit(&sdp->sd_live_gh);
 253
 254 fail_mount:
 255         gfs2_glock_dq_uninit(mount_gh);
 256
 257 fail:
 258         while (sdp->sd_glockd_num--)
 259                 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
 260
 261         kthread_stop(sdp->sd_scand_process);
 262
 263         return error;
 264 }
 265
 266 static struct inode *gfs2_lookup_root(struct super_block *sb,
 267                                       struct gfs2_inum *inum)
 268 {
 269         return gfs2_inode_lookup(sb, inum, DT_DIR);
 270 }
 271
 272 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 273 {
 274         struct super_block *sb = sdp->sd_vfs;
 275         struct gfs2_holder sb_gh;
 276         struct gfs2_inum *inum;
 277         struct inode *inode;
 278         int error = 0;
 279
 280         if (undo) {
 281                 if (sb->s_root) {
 282                         dput(sb->s_root);
 283                         sb->s_root = NULL;
 284                 }
 285                 return 0;
 286         }
 287
 288         error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
 289                                  LM_ST_SHARED, 0, &sb_gh);
 290         if (error) {
 291                 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
 292                 return error;
 293         }
 294
 295         error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
 296         if (error) {
 297                 fs_err(sdp, "can't read superblock: %d\n", error);
 298                 goto out;
 299         }
 300
 301         /* Set up the buffer cache and SB for real */
 302         if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
 303                 error = -EINVAL;
 304                 fs_err(sdp, "FS block size (%u) is too small for device "
 305                        "block size (%u)\n",
 306                        sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
 307                 goto out;
 308         }
 309         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
 310                 error = -EINVAL;
 311                 fs_err(sdp, "FS block size (%u) is too big for machine "
 312                        "page size (%u)\n",
 313                        sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
 314                 goto out;
 315         }
 316         sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 317
 318         /* Get the root inode */
 319         inum = &sdp->sd_sb.sb_root_dir;
 320         if (sb->s_type == &gfs2meta_fs_type)
 321                 inum = &sdp->sd_sb.sb_master_dir;
 322         inode = gfs2_lookup_root(sb, inum);
 323         if (IS_ERR(inode)) {
 324                 error = PTR_ERR(inode);
 325                 fs_err(sdp, "can't read in root inode: %d\n", error);
 326                 goto out;
 327         }
 328
 329         sb->s_root = d_alloc_root(inode);
 330         if (!sb->s_root) {
 331                 fs_err(sdp, "can't get root dentry\n");
 332                 error = -ENOMEM;
 333                 iput(inode);
 334         }
 335         sb->s_root->d_op = &gfs2_dops;
 336 out:
 337         gfs2_glock_dq_uninit(&sb_gh);
 338         return error;
 339 }
 340
 341 static int init_journal(struct gfs2_sbd *sdp, int undo)
 342 {
 343         struct gfs2_holder ji_gh;
 344         struct task_struct *p;
 345         struct gfs2_inode *ip;
 346         int jindex = 1;
 347         int error = 0;
 348
 349         if (undo) {
 350                 jindex = 0;
 351                 goto fail_recoverd;
 352         }
 353
 354         sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
 355         if (IS_ERR(sdp->sd_jindex)) {
 356                 fs_err(sdp, "can't lookup journal index: %d\n", error);
 357                 return PTR_ERR(sdp->sd_jindex);
 358         }
 359         ip = GFS2_I(sdp->sd_jindex);
 360         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 361
 362         /* Load in the journal index special file */
 363
 364         error = gfs2_jindex_hold(sdp, &ji_gh);
 365         if (error) {
 366                 fs_err(sdp, "can't read journal index: %d\n", error);
 367                 goto fail;
 368         }
 369
 370         error = -EINVAL;
 371         if (!gfs2_jindex_size(sdp)) {
 372                 fs_err(sdp, "no journals!\n");
 373                 goto fail_jindex;
 374         }
 375
 376         if (sdp->sd_args.ar_spectator) {
 377                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
 378                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 379         } else {
 380                 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
 381                         fs_err(sdp, "can't mount journal #%u\n",
 382                                sdp->sd_lockstruct.ls_jid);
 383                         fs_err(sdp, "there are only %u journals (0 - %u)\n",
 384                                gfs2_jindex_size(sdp),
 385                                gfs2_jindex_size(sdp) - 1);
 386                         goto fail_jindex;
 387                 }
 388                 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
 389
 390                 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
 391                                           &gfs2_journal_glops,
 392                                           LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
 393                                           &sdp->sd_journal_gh);
 394                 if (error) {
 395                         fs_err(sdp, "can't acquire journal glock: %d\n", error);
 396                         goto fail_jindex;
 397                 }
 398
 399                 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 400                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
 401                                            LM_FLAG_NOEXP | GL_EXACT,
 402                                            &sdp->sd_jinode_gh);
 403                 if (error) {
 404                         fs_err(sdp, "can't acquire journal inode glock: %d\n",
 405                                error);
 406                         goto fail_journal_gh;
 407                 }
 408
 409                 error = gfs2_jdesc_check(sdp->sd_jdesc);
 410                 if (error) {
 411                         fs_err(sdp, "my journal (%u) is bad: %d\n",
 412                                sdp->sd_jdesc->jd_jid, error);
 413                         goto fail_jinode_gh;
 414                 }
 415                 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
 416         }
 417
 418         if (sdp->sd_lockstruct.ls_first) {
 419                 unsigned int x;
 420                 for (x = 0; x < sdp->sd_journals; x++) {
 421                         error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
 422                         if (error) {
 423                                 fs_err(sdp, "error recovering journal %u: %d\n",
 424                                        x, error);
 425                                 goto fail_jinode_gh;
 426                         }
 427                 }
 428
 429                 gfs2_lm_others_may_mount(sdp);
 430         } else if (!sdp->sd_args.ar_spectator) {
 431                 error = gfs2_recover_journal(sdp->sd_jdesc);
 432                 if (error) {
 433                         fs_err(sdp, "error recovering my journal: %d\n", error);
 434                         goto fail_jinode_gh;
 435                 }
 436         }
 437
 438         set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
 439         gfs2_glock_dq_uninit(&ji_gh);
 440         jindex = 0;
 441
 442         p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
 443         error = IS_ERR(p);
 444         if (error) {
 445                 fs_err(sdp, "can't start recoverd thread: %d\n", error);
 446                 goto fail_jinode_gh;
 447         }
 448         sdp->sd_recoverd_process = p;
 449
 450         return 0;
 451
 452  fail_recoverd:
 453         kthread_stop(sdp->sd_recoverd_process);
 454
 455  fail_jinode_gh:
 456         if (!sdp->sd_args.ar_spectator)
 457                 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 458
 459  fail_journal_gh:
 460         if (!sdp->sd_args.ar_spectator)
 461                 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
 462
 463  fail_jindex:
 464         gfs2_jindex_free(sdp);
 465         if (jindex)
 466                 gfs2_glock_dq_uninit(&ji_gh);
 467
 468  fail:
 469         iput(sdp->sd_jindex);
 470
 471         return error;
 472 }
 473
 474
 475 static int init_inodes(struct gfs2_sbd *sdp, int undo)
 476 {
 477         int error = 0;
 478         struct gfs2_inode *ip;
 479         struct inode *inode;
 480
 481         if (undo)
 482                 goto fail_qinode;
 483
 484         inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
 485         if (IS_ERR(inode)) {
 486                 error = PTR_ERR(inode);
 487                 fs_err(sdp, "can't read in master directory: %d\n", error);
 488                 goto fail;
 489         }
 490         sdp->sd_master_dir = inode;
 491
 492         error = init_journal(sdp, undo);
 493         if (error)
 494                 goto fail_master;
 495
 496         /* Read in the master inode number inode */
 497         sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
 498         if (IS_ERR(sdp->sd_inum_inode)) {
 499                 error = PTR_ERR(sdp->sd_inum_inode);
 500                 fs_err(sdp, "can't read in inum inode: %d\n", error);
 501                 goto fail_journal;
 502         }
 503
 504
 505         /* Read in the master statfs inode */
 506         sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
 507         if (IS_ERR(sdp->sd_statfs_inode)) {
 508                 error = PTR_ERR(sdp->sd_statfs_inode);
 509                 fs_err(sdp, "can't read in statfs inode: %d\n", error);
 510                 goto fail_inum;
 511         }
 512
 513         /* Read in the resource index inode */
 514         sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
 515         if (IS_ERR(sdp->sd_rindex)) {
 516                 error = PTR_ERR(sdp->sd_rindex);
 517                 fs_err(sdp, "can't get resource index inode: %d\n", error);
 518                 goto fail_statfs;
 519         }
 520         ip = GFS2_I(sdp->sd_rindex);
 521         set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 522         sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
 523
 524         /* Read in the quota inode */
 525         sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
 526         if (IS_ERR(sdp->sd_quota_inode)) {
 527                 error = PTR_ERR(sdp->sd_quota_inode);
 528                 fs_err(sdp, "can't get quota file inode: %d\n", error);
 529                 goto fail_rindex;
 530         }
 531         return 0;
 532
 533 fail_qinode:
 534         iput(sdp->sd_quota_inode);
 535
 536 fail_rindex:
 537         gfs2_clear_rgrpd(sdp);
 538         iput(sdp->sd_rindex);
 539
 540 fail_statfs:
 541         iput(sdp->sd_statfs_inode);
 542
 543 fail_inum:
 544         iput(sdp->sd_inum_inode);
 545 fail_journal:
 546         init_journal(sdp, UNDO);
 547 fail_master:
 548         iput(sdp->sd_master_dir);
 549 fail:
 550         return error;
 551 }
 552
 553 static int init_per_node(struct gfs2_sbd *sdp, int undo)
 554 {
 555         struct inode *pn = NULL;
 556         char buf[30];
 557         int error = 0;
 558         struct gfs2_inode *ip;
 559
 560         if (sdp->sd_args.ar_spectator)
 561                 return 0;
 562
 563         if (undo)
 564                 goto fail_qc_gh;
 565
 566         pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
 567         if (IS_ERR(pn)) {
 568                 error = PTR_ERR(pn);
 569                 fs_err(sdp, "can't find per_node directory: %d\n", error);
 570                 return error;
 571         }
 572
 573         sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
 574         sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
 575         if (IS_ERR(sdp->sd_ir_inode)) {
 576                 error = PTR_ERR(sdp->sd_ir_inode);
 577                 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
 578                 goto fail;
 579         }
 580
 581         sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
 582         sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
 583         if (IS_ERR(sdp->sd_sc_inode)) {
 584                 error = PTR_ERR(sdp->sd_sc_inode);
 585                 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
 586                 goto fail_ir_i;
 587         }
 588
 589         sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
 590         sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
 591         if (IS_ERR(sdp->sd_qc_inode)) {
 592                 error = PTR_ERR(sdp->sd_qc_inode);
 593                 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
 594                 goto fail_ut_i;
 595         }
 596
 597         iput(pn);
 598         pn = NULL;
 599
 600         ip = GFS2_I(sdp->sd_ir_inode);
 601         error = gfs2_glock_nq_init(ip->i_gl,
 602                                    LM_ST_EXCLUSIVE, 0,
 603                                    &sdp->sd_ir_gh);
 604         if (error) {
 605                 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
 606                 goto fail_qc_i;
 607         }
 608
 609         ip = GFS2_I(sdp->sd_sc_inode);
 610         error = gfs2_glock_nq_init(ip->i_gl,
 611                                    LM_ST_EXCLUSIVE, 0,
 612                                    &sdp->sd_sc_gh);
 613         if (error) {
 614                 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
 615                 goto fail_ir_gh;
 616         }
 617
 618         ip = GFS2_I(sdp->sd_qc_inode);
 619         error = gfs2_glock_nq_init(ip->i_gl,
 620                                    LM_ST_EXCLUSIVE, 0,
 621                                    &sdp->sd_qc_gh);
 622         if (error) {
 623                 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
 624                 goto fail_ut_gh;
 625         }
 626
 627         return 0;
 628
 629  fail_qc_gh:
 630         gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
 631
 632  fail_ut_gh:
 633
 634         gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
 635
 636  fail_ir_gh:
 637         gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
 638
 639  fail_qc_i:
 640         iput(sdp->sd_qc_inode);
 641
 642  fail_ut_i:
 643
 644         iput(sdp->sd_sc_inode);
 645
 646  fail_ir_i:
 647         iput(sdp->sd_ir_inode);
 648
 649  fail:
 650         if (pn)
 651                 iput(pn);
 652         return error;
 653 }
 654
 655 static int init_threads(struct gfs2_sbd *sdp, int undo)
 656 {
 657         struct task_struct *p;
 658         int error = 0;
 659
 660         if (undo)
 661                 goto fail_quotad;
 662
 663         sdp->sd_log_flush_time = jiffies;
 664         sdp->sd_jindex_refresh_time = jiffies;
 665
 666         p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
 667         error = IS_ERR(p);
 668         if (error) {
 669                 fs_err(sdp, "can't start logd thread: %d\n", error);
 670                 return error;
 671         }
 672         sdp->sd_logd_process = p;
 673
 674         sdp->sd_statfs_sync_time = jiffies;
 675         sdp->sd_quota_sync_time = jiffies;
 676
 677         p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
 678         error = IS_ERR(p);
 679         if (error) {
 680                 fs_err(sdp, "can't start quotad thread: %d\n", error);
 681                 goto fail;
 682         }
 683         sdp->sd_quotad_process = p;
 684
 685         return 0;
 686
 687
 688 fail_quotad:
 689         kthread_stop(sdp->sd_quotad_process);
 690 fail:
 691         kthread_stop(sdp->sd_logd_process);
 692         return error;
 693 }
 694
 695 /**
 696  * fill_super - Read in superblock
 697  * @sb: The VFS superblock
 698  * @data: Mount options
 699  * @silent: Don't complain if it's not a GFS2 filesystem
 700  *
 701  * Returns: errno
 702  */
 703
 704 static int fill_super(struct super_block *sb, void *data, int silent)
 705 {
 706         struct gfs2_sbd *sdp;
 707         struct gfs2_holder mount_gh;
 708         int error;
 709
 710         sdp = init_sbd(sb);
 711         if (!sdp) {
 712                 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 713                 return -ENOMEM;
 714         }
 715
 716         error = gfs2_mount_args(sdp, (char *)data, 0);
 717         if (error) {
 718                 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 719                 goto fail;
 720         }
 721
 722         init_vfs(sb, SDF_NOATIME);
 723
 724         /* Set up the buffer cache and fill in some fake block size values
 725            to allow us to read-in the on-disk superblock. */
 726         sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
 727         sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
 728         sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
 729                                GFS2_BASIC_BLOCK_SHIFT;
 730         sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 731
 732         error = init_names(sdp, silent);
 733         if (error)
 734                 goto fail;
 735
 736         error = gfs2_sys_fs_add(sdp);
 737         if (error)
 738                 goto fail;
 739
 740         error = gfs2_lm_mount(sdp, silent);
 741         if (error)
 742                 goto fail_sys;
 743
 744         error = init_locking(sdp, &mount_gh, DO);
 745         if (error)
 746                 goto fail_lm;
 747
 748         error = init_sb(sdp, silent, DO);
 749         if (error)
 750                 goto fail_locking;
 751
 752         error = init_inodes(sdp, DO);
 753         if (error)
 754                 goto fail_sb;
 755
 756         error = init_per_node(sdp, DO);
 757         if (error)
 758                 goto fail_inodes;
 759
 760         error = gfs2_statfs_init(sdp);
 761         if (error) {
 762                 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
 763                 goto fail_per_node;
 764         }
 765
 766         error = init_threads(sdp, DO);
 767         if (error)
 768                 goto fail_per_node;
 769
 770         if (!(sb->s_flags & MS_RDONLY)) {
 771                 error = gfs2_make_fs_rw(sdp);
 772                 if (error) {
 773                         fs_err(sdp, "can't make FS RW: %d\n", error);
 774                         goto fail_threads;
 775                 }
 776         }
 777
 778         gfs2_glock_dq_uninit(&mount_gh);
 779
 780         return 0;
 781
 782  fail_threads:
 783         init_threads(sdp, UNDO);
 784
 785  fail_per_node:
 786         init_per_node(sdp, UNDO);
 787
 788  fail_inodes:
 789         init_inodes(sdp, UNDO);
 790
 791  fail_sb:
 792         init_sb(sdp, 0, UNDO);
 793
 794  fail_locking:
 795         init_locking(sdp, &mount_gh, UNDO);
 796
 797  fail_lm:
 798         gfs2_gl_hash_clear(sdp, WAIT);
 799         gfs2_lm_unmount(sdp);
 800         while (invalidate_inodes(sb))
 801                 yield();
 802
 803  fail_sys:
 804         gfs2_sys_fs_del(sdp);
 805
 806  fail:
 807         vfree(sdp);
 808         sb->s_fs_info = NULL;
 809
 810         return error;
 811 }
 812
 813 static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
 814                 const char *dev_name, void *data, struct vfsmount *mnt)
 815 {
 816         return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
 817 }
 818
 819 static void gfs2_kill_sb(struct super_block *sb)
 820 {
 821         kill_block_super(sb);
 822 }
 823
 824 struct file_system_type gfs2_fs_type = {
 825         .name = "gfs2",
 826         .fs_flags = FS_REQUIRES_DEV,
 827         .get_sb = gfs2_get_sb,
 828         .kill_sb = gfs2_kill_sb,
 829         .owner = THIS_MODULE,
 830 };
 831
 832 struct file_system_type gfs2meta_fs_type = {
 833         .name = "gfs2meta",
 834         .fs_flags = FS_REQUIRES_DEV,
 835         .get_sb = gfs2_get_sb,
 836         .kill_sb = gfs2_kill_sb,
 837         .owner = THIS_MODULE,
 838 };
 839