fs/ocfs2/super.c

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * super.c
   5  *
   6  * load/unload driver, mount/dismount volumes
   7  *
   8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public
  21  * License along with this program; if not, write to the
  22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23  * Boston, MA 021110-1307, USA.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/fs.h>
  28 #include <linux/types.h>
  29 #include <linux/slab.h>
  30 #include <linux/highmem.h>
  31 #include <linux/utsname.h>
  32 #include <linux/init.h>
  33 #include <linux/random.h>
  34 #include <linux/statfs.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/blkdev.h>
  37 #include <linux/socket.h>
  38 #include <linux/inet.h>
  39 #include <linux/parser.h>
  40 #include <linux/crc32.h>
  41 #include <linux/debugfs.h>
  42 #include <linux/mount.h>
  43 #include <linux/seq_file.h>
  44
  45 #define MLOG_MASK_PREFIX ML_SUPER
  46 #include <cluster/masklog.h>
  47
  48 #include "ocfs2.h"
  49
  50 /* this should be the only file to include a version 1 header */
  51 #include "ocfs1_fs_compat.h"
  52
  53 #include "alloc.h"
  54 #include "dlmglue.h"
  55 #include "export.h"
  56 #include "extent_map.h"
  57 #include "heartbeat.h"
  58 #include "inode.h"
  59 #include "journal.h"
  60 #include "localalloc.h"
  61 #include "namei.h"
  62 #include "slot_map.h"
  63 #include "super.h"
  64 #include "sysfile.h"
  65 #include "uptodate.h"
  66 #include "ver.h"
  67 #include "xattr.h"
  68
  69 #include "buffer_head_io.h"
  70
  71 static struct kmem_cache *ocfs2_inode_cachep = NULL;
  72
  73 /* OCFS2 needs to schedule several differnt types of work which
  74  * require cluster locking, disk I/O, recovery waits, etc. Since these
  75  * types of work tend to be heavy we avoid using the kernel events
  76  * workqueue and schedule on our own. */
  77 struct workqueue_struct *ocfs2_wq = NULL;
  78
  79 static struct dentry *ocfs2_debugfs_root = NULL;
  80
  81 MODULE_AUTHOR("Oracle");
  82 MODULE_LICENSE("GPL");
  83
  84 struct mount_options
  85 {
  86         unsigned long   commit_interval;
  87         unsigned long   mount_opt;
  88         unsigned int    atime_quantum;
  89         signed short    slot;
  90         unsigned int    localalloc_opt;
  91         char            cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
  92 };
  93
  94 static int ocfs2_parse_options(struct super_block *sb, char *options,
  95                                struct mount_options *mopt,
  96                                int is_remount);
  97 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
  98 static void ocfs2_put_super(struct super_block *sb);
  99 static int ocfs2_mount_volume(struct super_block *sb);
 100 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
 101 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
 102 static int ocfs2_initialize_mem_caches(void);
 103 static void ocfs2_free_mem_caches(void);
 104 static void ocfs2_delete_osb(struct ocfs2_super *osb);
 105
 106 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
 107
 108 static int ocfs2_sync_fs(struct super_block *sb, int wait);
 109
 110 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
 111 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
 112 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
 113 static int ocfs2_check_volume(struct ocfs2_super *osb);
 114 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
 115                                struct buffer_head *bh,
 116                                u32 sectsize);
 117 static int ocfs2_initialize_super(struct super_block *sb,
 118                                   struct buffer_head *bh,
 119                                   int sector_size);
 120 static int ocfs2_get_sector(struct super_block *sb,
 121                             struct buffer_head **bh,
 122                             int block,
 123                             int sect_size);
 124 static void ocfs2_write_super(struct super_block *sb);
 125 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
 126 static void ocfs2_destroy_inode(struct inode *inode);
 127
 128 static const struct super_operations ocfs2_sops = {
 129         .statfs         = ocfs2_statfs,
 130         .alloc_inode    = ocfs2_alloc_inode,
 131         .destroy_inode  = ocfs2_destroy_inode,
 132         .drop_inode     = ocfs2_drop_inode,
 133         .clear_inode    = ocfs2_clear_inode,
 134         .delete_inode   = ocfs2_delete_inode,
 135         .sync_fs        = ocfs2_sync_fs,
 136         .write_super    = ocfs2_write_super,
 137         .put_super      = ocfs2_put_super,
 138         .remount_fs     = ocfs2_remount,
 139         .show_options   = ocfs2_show_options,
 140 };
 141
 142 enum {
 143         Opt_barrier,
 144         Opt_err_panic,
 145         Opt_err_ro,
 146         Opt_intr,
 147         Opt_nointr,
 148         Opt_hb_none,
 149         Opt_hb_local,
 150         Opt_data_ordered,
 151         Opt_data_writeback,
 152         Opt_atime_quantum,
 153         Opt_slot,
 154         Opt_commit,
 155         Opt_localalloc,
 156         Opt_localflocks,
 157         Opt_stack,
 158         Opt_user_xattr,
 159         Opt_nouser_xattr,
 160         Opt_inode64,
 161         Opt_err,
 162 };
 163
 164 static const match_table_t tokens = {
 165         {Opt_barrier, "barrier=%u"},
 166         {Opt_err_panic, "errors=panic"},
 167         {Opt_err_ro, "errors=remount-ro"},
 168         {Opt_intr, "intr"},
 169         {Opt_nointr, "nointr"},
 170         {Opt_hb_none, OCFS2_HB_NONE},
 171         {Opt_hb_local, OCFS2_HB_LOCAL},
 172         {Opt_data_ordered, "data=ordered"},
 173         {Opt_data_writeback, "data=writeback"},
 174         {Opt_atime_quantum, "atime_quantum=%u"},
 175         {Opt_slot, "preferred_slot=%u"},
 176         {Opt_commit, "commit=%u"},
 177         {Opt_localalloc, "localalloc=%d"},
 178         {Opt_localflocks, "localflocks"},
 179         {Opt_stack, "cluster_stack=%s"},
 180         {Opt_user_xattr, "user_xattr"},
 181         {Opt_nouser_xattr, "nouser_xattr"},
 182         {Opt_inode64, "inode64"},
 183         {Opt_err, NULL}
 184 };
 185
 186 /*
 187  * write_super and sync_fs ripped right out of ext3.
 188  */
 189 static void ocfs2_write_super(struct super_block *sb)
 190 {
 191         if (mutex_trylock(&sb->s_lock) != 0)
 192                 BUG();
 193         sb->s_dirt = 0;
 194 }
 195
 196 static int ocfs2_sync_fs(struct super_block *sb, int wait)
 197 {
 198         int status;
 199         tid_t target;
 200         struct ocfs2_super *osb = OCFS2_SB(sb);
 201
 202         sb->s_dirt = 0;
 203
 204         if (ocfs2_is_hard_readonly(osb))
 205                 return -EROFS;
 206
 207         if (wait) {
 208                 status = ocfs2_flush_truncate_log(osb);
 209                 if (status < 0)
 210                         mlog_errno(status);
 211         } else {
 212                 ocfs2_schedule_truncate_log_flush(osb, 0);
 213         }
 214
 215         if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
 216                                       &target)) {
 217                 if (wait)
 218                         jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
 219                                              target);
 220         }
 221         return 0;
 222 }
 223
 224 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
 225 {
 226         struct inode *new = NULL;
 227         int status = 0;
 228         int i;
 229
 230         mlog_entry_void();
 231
 232         new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
 233         if (IS_ERR(new)) {
 234                 status = PTR_ERR(new);
 235                 mlog_errno(status);
 236                 goto bail;
 237         }
 238         osb->root_inode = new;
 239
 240         new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
 241         if (IS_ERR(new)) {
 242                 status = PTR_ERR(new);
 243                 mlog_errno(status);
 244                 goto bail;
 245         }
 246         osb->sys_root_inode = new;
 247
 248         for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
 249              i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
 250                 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
 251                 if (!new) {
 252                         ocfs2_release_system_inodes(osb);
 253                         status = -EINVAL;
 254                         mlog_errno(status);
 255                         /* FIXME: Should ERROR_RO_FS */
 256                         mlog(ML_ERROR, "Unable to load system inode %d, "
 257                              "possibly corrupt fs?", i);
 258                         goto bail;
 259                 }
 260                 // the array now has one ref, so drop this one
 261                 iput(new);
 262         }
 263
 264 bail:
 265         mlog_exit(status);
 266         return status;
 267 }
 268
 269 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
 270 {
 271         struct inode *new = NULL;
 272         int status = 0;
 273         int i;
 274
 275         mlog_entry_void();
 276
 277         for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
 278              i < NUM_SYSTEM_INODES;
 279              i++) {
 280                 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
 281                 if (!new) {
 282                         ocfs2_release_system_inodes(osb);
 283                         status = -EINVAL;
 284                         mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
 285                              status, i, osb->slot_num);
 286                         goto bail;
 287                 }
 288                 /* the array now has one ref, so drop this one */
 289                 iput(new);
 290         }
 291
 292 bail:
 293         mlog_exit(status);
 294         return status;
 295 }
 296
 297 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
 298 {
 299         int i;
 300         struct inode *inode;
 301
 302         mlog_entry_void();
 303
 304         for (i = 0; i < NUM_SYSTEM_INODES; i++) {
 305                 inode = osb->system_inodes[i];
 306                 if (inode) {
 307                         iput(inode);
 308                         osb->system_inodes[i] = NULL;
 309                 }
 310         }
 311
 312         inode = osb->sys_root_inode;
 313         if (inode) {
 314                 iput(inode);
 315                 osb->sys_root_inode = NULL;
 316         }
 317
 318         inode = osb->root_inode;
 319         if (inode) {
 320                 iput(inode);
 321                 osb->root_inode = NULL;
 322         }
 323
 324         mlog_exit(0);
 325 }
 326
 327 /* We're allocating fs objects, use GFP_NOFS */
 328 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
 329 {
 330         struct ocfs2_inode_info *oi;
 331
 332         oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
 333         if (!oi)
 334                 return NULL;
 335
 336         jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
 337         return &oi->vfs_inode;
 338 }
 339
 340 static void ocfs2_destroy_inode(struct inode *inode)
 341 {
 342         kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
 343 }
 344
 345 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
 346                                                 unsigned int cbits)
 347 {
 348         unsigned int bytes = 1 << cbits;
 349         unsigned int trim = bytes;
 350         unsigned int bitshift = 32;
 351
 352         /*
 353          * i_size and all block offsets in ocfs2 are always 64 bits
 354          * wide. i_clusters is 32 bits, in cluster-sized units. So on
 355          * 64 bit platforms, cluster size will be the limiting factor.
 356          */
 357
 358 #if BITS_PER_LONG == 32
 359 # if defined(CONFIG_LBD)
 360         BUILD_BUG_ON(sizeof(sector_t) != 8);
 361         /*
 362          * We might be limited by page cache size.
 363          */
 364         if (bytes > PAGE_CACHE_SIZE) {
 365                 bytes = PAGE_CACHE_SIZE;
 366                 trim = 1;
 367                 /*
 368                  * Shift by 31 here so that we don't get larger than
 369                  * MAX_LFS_FILESIZE
 370                  */
 371                 bitshift = 31;
 372         }
 373 # else
 374         /*
 375          * We are limited by the size of sector_t. Use block size, as
 376          * that's what we expose to the VFS.
 377          */
 378         bytes = 1 << bbits;
 379         trim = 1;
 380         bitshift = 31;
 381 # endif
 382 #endif
 383
 384         /*
 385          * Trim by a whole cluster when we can actually approach the
 386          * on-disk limits. Otherwise we can overflow i_clusters when
 387          * an extent start is at the max offset.
 388          */
 389         return (((unsigned long long)bytes) << bitshift) - trim;
 390 }
 391
 392 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
 393 {
 394         int incompat_features;
 395         int ret = 0;
 396         struct mount_options parsed_options;
 397         struct ocfs2_super *osb = OCFS2_SB(sb);
 398
 399         if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
 400                 ret = -EINVAL;
 401                 goto out;
 402         }
 403
 404         if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
 405             (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
 406                 ret = -EINVAL;
 407                 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
 408                 goto out;
 409         }
 410
 411         if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
 412             (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
 413                 ret = -EINVAL;
 414                 mlog(ML_ERROR, "Cannot change data mode on remount\n");
 415                 goto out;
 416         }
 417
 418         /* Probably don't want this on remount; it might
 419          * mess with other nodes */
 420         if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
 421             (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
 422                 ret = -EINVAL;
 423                 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
 424                 goto out;
 425         }
 426
 427         /* We're going to/from readonly mode. */
 428         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
 429                 /* Lock here so the check of HARD_RO and the potential
 430                  * setting of SOFT_RO is atomic. */
 431                 spin_lock(&osb->osb_lock);
 432                 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
 433                         mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
 434                         ret = -EROFS;
 435                         goto unlock_osb;
 436                 }
 437
 438                 if (*flags & MS_RDONLY) {
 439                         mlog(0, "Going to ro mode.\n");
 440                         sb->s_flags |= MS_RDONLY;
 441                         osb->osb_flags |= OCFS2_OSB_SOFT_RO;
 442                 } else {
 443                         mlog(0, "Making ro filesystem writeable.\n");
 444
 445                         if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
 446                                 mlog(ML_ERROR, "Cannot remount RDWR "
 447                                      "filesystem due to previous errors.\n");
 448                                 ret = -EROFS;
 449                                 goto unlock_osb;
 450                         }
 451                         incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
 452                         if (incompat_features) {
 453                                 mlog(ML_ERROR, "Cannot remount RDWR because "
 454                                      "of unsupported optional features "
 455                                      "(%x).\n", incompat_features);
 456                                 ret = -EINVAL;
 457                                 goto unlock_osb;
 458                         }
 459                         sb->s_flags &= ~MS_RDONLY;
 460                         osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
 461                 }
 462 unlock_osb:
 463                 spin_unlock(&osb->osb_lock);
 464         }
 465
 466         if (!ret) {
 467                 /* Only save off the new mount options in case of a successful
 468                  * remount. */
 469                 osb->s_mount_opt = parsed_options.mount_opt;
 470                 osb->s_atime_quantum = parsed_options.atime_quantum;
 471                 osb->preferred_slot = parsed_options.slot;
 472                 if (parsed_options.commit_interval)
 473                         osb->osb_commit_interval = parsed_options.commit_interval;
 474
 475                 if (!ocfs2_is_hard_readonly(osb))
 476                         ocfs2_set_journal_params(osb);
 477         }
 478 out:
 479         return ret;
 480 }
 481
 482 static int ocfs2_sb_probe(struct super_block *sb,
 483                           struct buffer_head **bh,
 484                           int *sector_size)
 485 {
 486         int status, tmpstat;
 487         struct ocfs1_vol_disk_hdr *hdr;
 488         struct ocfs2_dinode *di;
 489         int blksize;
 490
 491         *bh = NULL;
 492
 493         /* may be > 512 */
 494         *sector_size = bdev_hardsect_size(sb->s_bdev);
 495         if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
 496                 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
 497                      *sector_size, OCFS2_MAX_BLOCKSIZE);
 498                 status = -EINVAL;
 499                 goto bail;
 500         }
 501
 502         /* Can this really happen? */
 503         if (*sector_size < OCFS2_MIN_BLOCKSIZE)
 504                 *sector_size = OCFS2_MIN_BLOCKSIZE;
 505
 506         /* check block zero for old format */
 507         status = ocfs2_get_sector(sb, bh, 0, *sector_size);
 508         if (status < 0) {
 509                 mlog_errno(status);
 510                 goto bail;
 511         }
 512         hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
 513         if (hdr->major_version == OCFS1_MAJOR_VERSION) {
 514                 mlog(ML_ERROR, "incompatible version: %u.%u\n",
 515                      hdr->major_version, hdr->minor_version);
 516                 status = -EINVAL;
 517         }
 518         if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
 519                    strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
 520                 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
 521                      hdr->signature);
 522                 status = -EINVAL;
 523         }
 524         brelse(*bh);
 525         *bh = NULL;
 526         if (status < 0) {
 527                 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
 528                      "upgraded before mounting with ocfs v2\n");
 529                 goto bail;
 530         }
 531
 532         /*
 533          * Now check at magic offset for 512, 1024, 2048, 4096
 534          * blocksizes.  4096 is the maximum blocksize because it is
 535          * the minimum clustersize.
 536          */
 537         status = -EINVAL;
 538         for (blksize = *sector_size;
 539              blksize <= OCFS2_MAX_BLOCKSIZE;
 540              blksize <<= 1) {
 541                 tmpstat = ocfs2_get_sector(sb, bh,
 542                                            OCFS2_SUPER_BLOCK_BLKNO,
 543                                            blksize);
 544                 if (tmpstat < 0) {
 545                         status = tmpstat;
 546                         mlog_errno(status);
 547                         goto bail;
 548                 }
 549                 di = (struct ocfs2_dinode *) (*bh)->b_data;
 550                 status = ocfs2_verify_volume(di, *bh, blksize);
 551                 if (status >= 0)
 552                         goto bail;
 553                 brelse(*bh);
 554                 *bh = NULL;
 555                 if (status != -EAGAIN)
 556                         break;
 557         }
 558
 559 bail:
 560         return status;
 561 }
 562
 563 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
 564 {
 565         if (ocfs2_mount_local(osb)) {
 566                 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
 567                         mlog(ML_ERROR, "Cannot heartbeat on a locally "
 568                              "mounted device.\n");
 569                         return -EINVAL;
 570                 }
 571         }
 572
 573         if (ocfs2_userspace_stack(osb)) {
 574                 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
 575                         mlog(ML_ERROR, "Userspace stack expected, but "
 576                              "o2cb heartbeat arguments passed to mount\n");
 577                         return -EINVAL;
 578                 }
 579         }
 580
 581         if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
 582                 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
 583                     !ocfs2_userspace_stack(osb)) {
 584                         mlog(ML_ERROR, "Heartbeat has to be started to mount "
 585                              "a read-write clustered device.\n");
 586                         return -EINVAL;
 587                 }
 588         }
 589
 590         return 0;
 591 }
 592
 593 /*
 594  * If we're using a userspace stack, mount should have passed
 595  * a name that matches the disk.  If not, mount should not
 596  * have passed a stack.
 597  */
 598 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
 599                                         struct mount_options *mopt)
 600 {
 601         if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
 602                 mlog(ML_ERROR,
 603                      "cluster stack passed to mount, but this filesystem "
 604                      "does not support it\n");
 605                 return -EINVAL;
 606         }
 607
 608         if (ocfs2_userspace_stack(osb) &&
 609             strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
 610                     OCFS2_STACK_LABEL_LEN)) {
 611                 mlog(ML_ERROR,
 612                      "cluster stack passed to mount (\"%s\") does not "
 613                      "match the filesystem (\"%s\")\n",
 614                      mopt->cluster_stack,
 615                      osb->osb_cluster_stack);
 616                 return -EINVAL;
 617         }
 618
 619         return 0;
 620 }
 621
 622 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
 623 {
 624         struct dentry *root;
 625         int status, sector_size;
 626         struct mount_options parsed_options;
 627         struct inode *inode = NULL;
 628         struct ocfs2_super *osb = NULL;
 629         struct buffer_head *bh = NULL;
 630         char nodestr[8];
 631
 632         mlog_entry("%p, %p, %i", sb, data, silent);
 633
 634         if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
 635                 status = -EINVAL;
 636                 goto read_super_error;
 637         }
 638
 639         /* probe for superblock */
 640         status = ocfs2_sb_probe(sb, &bh, &sector_size);
 641         if (status < 0) {
 642                 mlog(ML_ERROR, "superblock probe failed!\n");
 643                 goto read_super_error;
 644         }
 645
 646         status = ocfs2_initialize_super(sb, bh, sector_size);
 647         osb = OCFS2_SB(sb);
 648         if (status < 0) {
 649                 mlog_errno(status);
 650                 goto read_super_error;
 651         }
 652         brelse(bh);
 653         bh = NULL;
 654         osb->s_mount_opt = parsed_options.mount_opt;
 655         osb->s_atime_quantum = parsed_options.atime_quantum;
 656         osb->preferred_slot = parsed_options.slot;
 657         osb->osb_commit_interval = parsed_options.commit_interval;
 658         osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
 659         osb->local_alloc_bits = osb->local_alloc_default_bits;
 660
 661         status = ocfs2_verify_userspace_stack(osb, &parsed_options);
 662         if (status)
 663                 goto read_super_error;
 664
 665         sb->s_magic = OCFS2_SUPER_MAGIC;
 666
 667         /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
 668          * heartbeat=none */
 669         if (bdev_read_only(sb->s_bdev)) {
 670                 if (!(sb->s_flags & MS_RDONLY)) {
 671                         status = -EACCES;
 672                         mlog(ML_ERROR, "Readonly device detected but readonly "
 673                              "mount was not specified.\n");
 674                         goto read_super_error;
 675                 }
 676
 677                 /* You should not be able to start a local heartbeat
 678                  * on a readonly device. */
 679                 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
 680                         status = -EROFS;
 681                         mlog(ML_ERROR, "Local heartbeat specified on readonly "
 682                              "device.\n");
 683                         goto read_super_error;
 684                 }
 685
 686                 status = ocfs2_check_journals_nolocks(osb);
 687                 if (status < 0) {
 688                         if (status == -EROFS)
 689                                 mlog(ML_ERROR, "Recovery required on readonly "
 690                                      "file system, but write access is "
 691                                      "unavailable.\n");
 692                         else
 693                                 mlog_errno(status);
 694                         goto read_super_error;
 695                 }
 696
 697                 ocfs2_set_ro_flag(osb, 1);
 698
 699                 printk(KERN_NOTICE "Readonly device detected. No cluster "
 700                        "services will be utilized for this mount. Recovery "
 701                        "will be skipped.\n");
 702         }
 703
 704         if (!ocfs2_is_hard_readonly(osb)) {
 705                 if (sb->s_flags & MS_RDONLY)
 706                         ocfs2_set_ro_flag(osb, 0);
 707         }
 708
 709         status = ocfs2_verify_heartbeat(osb);
 710         if (status < 0) {
 711                 mlog_errno(status);
 712                 goto read_super_error;
 713         }
 714
 715         osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
 716                                                  ocfs2_debugfs_root);
 717         if (!osb->osb_debug_root) {
 718                 status = -EINVAL;
 719                 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
 720                 goto read_super_error;
 721         }
 722
 723         status = ocfs2_mount_volume(sb);
 724         if (osb->root_inode)
 725                 inode = igrab(osb->root_inode);
 726
 727         if (status < 0)
 728                 goto read_super_error;
 729
 730         if (!inode) {
 731                 status = -EIO;
 732                 mlog_errno(status);
 733                 goto read_super_error;
 734         }
 735
 736         root = d_alloc_root(inode);
 737         if (!root) {
 738                 status = -ENOMEM;
 739                 mlog_errno(status);
 740                 goto read_super_error;
 741         }
 742
 743         sb->s_root = root;
 744
 745         ocfs2_complete_mount_recovery(osb);
 746
 747         if (ocfs2_mount_local(osb))
 748                 snprintf(nodestr, sizeof(nodestr), "local");
 749         else
 750                 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
 751
 752         printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
 753                "with %s data mode.\n",
 754                osb->dev_str, nodestr, osb->slot_num,
 755                osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
 756                "ordered");
 757
 758         atomic_set(&osb->vol_state, VOLUME_MOUNTED);
 759         wake_up(&osb->osb_mount_event);
 760
 761         mlog_exit(status);
 762         return status;
 763
 764 read_super_error:
 765         if (bh != NULL)
 766                 brelse(bh);
 767
 768         if (inode)
 769                 iput(inode);
 770
 771         if (osb) {
 772                 atomic_set(&osb->vol_state, VOLUME_DISABLED);
 773                 wake_up(&osb->osb_mount_event);
 774                 ocfs2_dismount_volume(sb, 1);
 775         }
 776
 777         mlog_exit(status);
 778         return status;
 779 }
 780
 781 static int ocfs2_get_sb(struct file_system_type *fs_type,
 782                         int flags,
 783                         const char *dev_name,
 784                         void *data,
 785                         struct vfsmount *mnt)
 786 {
 787         return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
 788                            mnt);
 789 }
 790
 791 static struct file_system_type ocfs2_fs_type = {
 792         .owner          = THIS_MODULE,
 793         .name           = "ocfs2",
 794         .get_sb         = ocfs2_get_sb, /* is this called when we mount
 795                                         * the fs? */
 796         .kill_sb        = kill_block_super, /* set to the generic one
 797                                              * right now, but do we
 798                                              * need to change that? */
 799         .fs_flags       = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
 800         .next           = NULL
 801 };
 802
 803 static int ocfs2_parse_options(struct super_block *sb,
 804                                char *options,
 805                                struct mount_options *mopt,
 806                                int is_remount)
 807 {
 808         int status;
 809         char *p;
 810
 811         mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
 812                    options ? options : "(none)");
 813
 814         mopt->commit_interval = 0;
 815         mopt->mount_opt = 0;
 816         mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
 817         mopt->slot = OCFS2_INVALID_SLOT;
 818         mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
 819         mopt->cluster_stack[0] = '\0';
 820
 821         if (!options) {
 822                 status = 1;
 823                 goto bail;
 824         }
 825
 826         while ((p = strsep(&options, ",")) != NULL) {
 827                 int token, option;
 828                 substring_t args[MAX_OPT_ARGS];
 829
 830                 if (!*p)
 831                         continue;
 832
 833                 token = match_token(p, tokens, args);
 834                 switch (token) {
 835                 case Opt_hb_local:
 836                         mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
 837                         break;
 838                 case Opt_hb_none:
 839                         mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
 840                         break;
 841                 case Opt_barrier:
 842                         if (match_int(&args[0], &option)) {
 843                                 status = 0;
 844                                 goto bail;
 845                         }
 846                         if (option)
 847                                 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
 848                         else
 849                                 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
 850                         break;
 851                 case Opt_intr:
 852                         mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
 853                         break;
 854                 case Opt_nointr:
 855                         mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
 856                         break;
 857                 case Opt_err_panic:
 858                         mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
 859                         break;
 860                 case Opt_err_ro:
 861                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
 862                         break;
 863                 case Opt_data_ordered:
 864                         mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
 865                         break;
 866                 case Opt_data_writeback:
 867                         mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
 868                         break;
 869                 case Opt_user_xattr:
 870                         mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
 871                         break;
 872                 case Opt_nouser_xattr:
 873                         mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
 874                         break;
 875                 case Opt_atime_quantum:
 876                         if (match_int(&args[0], &option)) {
 877                                 status = 0;
 878                                 goto bail;
 879                         }
 880                         if (option >= 0)
 881                                 mopt->atime_quantum = option;
 882                         break;
 883                 case Opt_slot:
 884                         option = 0;
 885                         if (match_int(&args[0], &option)) {
 886                                 status = 0;
 887                                 goto bail;
 888                         }
 889                         if (option)
 890                                 mopt->slot = (s16)option;
 891                         break;
 892                 case Opt_commit:
 893                         option = 0;
 894                         if (match_int(&args[0], &option)) {
 895                                 status = 0;
 896                                 goto bail;
 897                         }
 898                         if (option < 0)
 899                                 return 0;
 900                         if (option == 0)
 901                                 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
 902                         mopt->commit_interval = HZ * option;
 903                         break;
 904                 case Opt_localalloc:
 905                         option = 0;
 906                         if (match_int(&args[0], &option)) {
 907                                 status = 0;
 908                                 goto bail;
 909                         }
 910                         if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
 911                                 mopt->localalloc_opt = option;
 912                         break;
 913                 case Opt_localflocks:
 914                         /*
 915                          * Changing this during remount could race
 916                          * flock() requests, or "unbalance" existing
 917                          * ones (e.g., a lock is taken in one mode but
 918                          * dropped in the other). If users care enough
 919                          * to flip locking modes during remount, we
 920                          * could add a "local" flag to individual
 921                          * flock structures for proper tracking of
 922                          * state.
 923                          */
 924                         if (!is_remount)
 925                                 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
 926                         break;
 927                 case Opt_stack:
 928                         /* Check both that the option we were passed
 929                          * is of the right length and that it is a proper
 930                          * string of the right length.
 931                          */
 932                         if (((args[0].to - args[0].from) !=
 933                              OCFS2_STACK_LABEL_LEN) ||
 934                             (strnlen(args[0].from,
 935                                      OCFS2_STACK_LABEL_LEN) !=
 936                              OCFS2_STACK_LABEL_LEN)) {
 937                                 mlog(ML_ERROR,
 938                                      "Invalid cluster_stack option\n");
 939                                 status = 0;
 940                                 goto bail;
 941                         }
 942                         memcpy(mopt->cluster_stack, args[0].from,
 943                                OCFS2_STACK_LABEL_LEN);
 944                         mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
 945                         break;
 946                 case Opt_inode64:
 947                         mopt->mount_opt |= OCFS2_MOUNT_INODE64;
 948                         break;
 949                 default:
 950                         mlog(ML_ERROR,
 951                              "Unrecognized mount option \"%s\" "
 952                              "or missing value\n", p);
 953                         status = 0;
 954                         goto bail;
 955                 }
 956         }
 957
 958         status = 1;
 959
 960 bail:
 961         mlog_exit(status);
 962         return status;
 963 }
 964
 965 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
 966 {
 967         struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
 968         unsigned long opts = osb->s_mount_opt;
 969         unsigned int local_alloc_megs;
 970
 971         if (opts & OCFS2_MOUNT_HB_LOCAL)
 972                 seq_printf(s, ",_netdev,heartbeat=local");
 973         else
 974                 seq_printf(s, ",heartbeat=none");
 975
 976         if (opts & OCFS2_MOUNT_NOINTR)
 977                 seq_printf(s, ",nointr");
 978
 979         if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
 980                 seq_printf(s, ",data=writeback");
 981         else
 982                 seq_printf(s, ",data=ordered");
 983
 984         if (opts & OCFS2_MOUNT_BARRIER)
 985                 seq_printf(s, ",barrier=1");
 986
 987         if (opts & OCFS2_MOUNT_ERRORS_PANIC)
 988                 seq_printf(s, ",errors=panic");
 989         else
 990                 seq_printf(s, ",errors=remount-ro");
 991
 992         if (osb->preferred_slot != OCFS2_INVALID_SLOT)
 993                 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
 994
 995         if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
 996                 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
 997
 998         if (osb->osb_commit_interval)
 999                 seq_printf(s, ",commit=%u",
1000                            (unsigned) (osb->osb_commit_interval / HZ));
1001
1002         local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1003         if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1004                 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1005
1006         if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1007                 seq_printf(s, ",localflocks,");
1008
1009         if (osb->osb_cluster_stack[0])
1010                 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1011                            osb->osb_cluster_stack);
1012
1013         if (opts & OCFS2_MOUNT_NOUSERXATTR)
1014                 seq_printf(s, ",nouser_xattr");
1015         else
1016                 seq_printf(s, ",user_xattr");
1017
1018         if (opts & OCFS2_MOUNT_INODE64)
1019                 seq_printf(s, ",inode64");
1020
1021         return 0;
1022 }
1023
1024 static int __init ocfs2_init(void)
1025 {
1026         int status;
1027
1028         mlog_entry_void();
1029
1030         ocfs2_print_version();
1031
1032         status = init_ocfs2_uptodate_cache();
1033         if (status < 0) {
1034                 mlog_errno(status);
1035                 goto leave;
1036         }
1037
1038         status = ocfs2_initialize_mem_caches();
1039         if (status < 0) {
1040                 mlog_errno(status);
1041                 goto leave;
1042         }
1043
1044         ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1045         if (!ocfs2_wq) {
1046                 status = -ENOMEM;
1047                 goto leave;
1048         }
1049
1050         ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1051         if (!ocfs2_debugfs_root) {
1052                 status = -EFAULT;
1053                 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1054         }
1055
1056         ocfs2_set_locking_protocol();
1057
1058 leave:
1059         if (status < 0) {
1060                 ocfs2_free_mem_caches();
1061                 exit_ocfs2_uptodate_cache();
1062         }
1063
1064         mlog_exit(status);
1065
1066         if (status >= 0) {
1067                 return register_filesystem(&ocfs2_fs_type);
1068         } else
1069                 return -1;
1070 }
1071
1072 static void __exit ocfs2_exit(void)
1073 {
1074         mlog_entry_void();
1075
1076         if (ocfs2_wq) {
1077                 flush_workqueue(ocfs2_wq);
1078                 destroy_workqueue(ocfs2_wq);
1079         }
1080
1081         debugfs_remove(ocfs2_debugfs_root);
1082
1083         ocfs2_free_mem_caches();
1084
1085         unregister_filesystem(&ocfs2_fs_type);
1086
1087         exit_ocfs2_uptodate_cache();
1088
1089         mlog_exit_void();
1090 }
1091
1092 static void ocfs2_put_super(struct super_block *sb)
1093 {
1094         mlog_entry("(0x%p)\n", sb);
1095
1096         ocfs2_sync_blockdev(sb);
1097         ocfs2_dismount_volume(sb, 0);
1098
1099         mlog_exit_void();
1100 }
1101
1102 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1103 {
1104         struct ocfs2_super *osb;
1105         u32 numbits, freebits;
1106         int status;
1107         struct ocfs2_dinode *bm_lock;
1108         struct buffer_head *bh = NULL;
1109         struct inode *inode = NULL;
1110
1111         mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1112
1113         osb = OCFS2_SB(dentry->d_sb);
1114
1115         inode = ocfs2_get_system_file_inode(osb,
1116                                             GLOBAL_BITMAP_SYSTEM_INODE,
1117                                             OCFS2_INVALID_SLOT);
1118         if (!inode) {
1119                 mlog(ML_ERROR, "failed to get bitmap inode\n");
1120                 status = -EIO;
1121                 goto bail;
1122         }
1123
1124         status = ocfs2_inode_lock(inode, &bh, 0);
1125         if (status < 0) {
1126                 mlog_errno(status);
1127                 goto bail;
1128         }
1129
1130         bm_lock = (struct ocfs2_dinode *) bh->b_data;
1131
1132         numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1133         freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1134
1135         buf->f_type = OCFS2_SUPER_MAGIC;
1136         buf->f_bsize = dentry->d_sb->s_blocksize;
1137         buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1138         buf->f_blocks = ((sector_t) numbits) *
1139                         (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1140         buf->f_bfree = ((sector_t) freebits) *
1141                        (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1142         buf->f_bavail = buf->f_bfree;
1143         buf->f_files = numbits;
1144         buf->f_ffree = freebits;
1145
1146         brelse(bh);
1147
1148         ocfs2_inode_unlock(inode, 0);
1149         status = 0;
1150 bail:
1151         if (inode)
1152                 iput(inode);
1153
1154         mlog_exit(status);
1155
1156         return status;
1157 }
1158
1159 static void ocfs2_inode_init_once(void *data)
1160 {
1161         struct ocfs2_inode_info *oi = data;
1162
1163         oi->ip_flags = 0;
1164         oi->ip_open_count = 0;
1165         spin_lock_init(&oi->ip_lock);
1166         ocfs2_extent_map_init(&oi->vfs_inode);
1167         INIT_LIST_HEAD(&oi->ip_io_markers);
1168         oi->ip_created_trans = 0;
1169         oi->ip_last_trans = 0;
1170         oi->ip_dir_start_lookup = 0;
1171
1172         init_rwsem(&oi->ip_alloc_sem);
1173         init_rwsem(&oi->ip_xattr_sem);
1174         mutex_init(&oi->ip_io_mutex);
1175
1176         oi->ip_blkno = 0ULL;
1177         oi->ip_clusters = 0;
1178
1179         ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1180         ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1181         ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1182
1183         ocfs2_metadata_cache_init(&oi->vfs_inode);
1184
1185         inode_init_once(&oi->vfs_inode);
1186 }
1187
1188 static int ocfs2_initialize_mem_caches(void)
1189 {
1190         ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1191                                        sizeof(struct ocfs2_inode_info),
1192                                        0,
1193                                        (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1194                                                 SLAB_MEM_SPREAD),
1195                                        ocfs2_inode_init_once);
1196         if (!ocfs2_inode_cachep)
1197                 return -ENOMEM;
1198
1199         return 0;
1200 }
1201
1202 static void ocfs2_free_mem_caches(void)
1203 {
1204         if (ocfs2_inode_cachep)
1205                 kmem_cache_destroy(ocfs2_inode_cachep);
1206
1207         ocfs2_inode_cachep = NULL;
1208 }
1209
1210 static int ocfs2_get_sector(struct super_block *sb,
1211                             struct buffer_head **bh,
1212                             int block,
1213                             int sect_size)
1214 {
1215         if (!sb_set_blocksize(sb, sect_size)) {
1216                 mlog(ML_ERROR, "unable to set blocksize\n");
1217                 return -EIO;
1218         }
1219
1220         *bh = sb_getblk(sb, block);
1221         if (!*bh) {
1222                 mlog_errno(-EIO);
1223                 return -EIO;
1224         }
1225         lock_buffer(*bh);
1226         if (!buffer_dirty(*bh))
1227                 clear_buffer_uptodate(*bh);
1228         unlock_buffer(*bh);
1229         ll_rw_block(READ, 1, bh);
1230         wait_on_buffer(*bh);
1231         return 0;
1232 }
1233
1234 static int ocfs2_mount_volume(struct super_block *sb)
1235 {
1236         int status = 0;
1237         int unlock_super = 0;
1238         struct ocfs2_super *osb = OCFS2_SB(sb);
1239
1240         mlog_entry_void();
1241
1242         if (ocfs2_is_hard_readonly(osb))
1243                 goto leave;
1244
1245         status = ocfs2_dlm_init(osb);
1246         if (status < 0) {
1247                 mlog_errno(status);
1248                 goto leave;
1249         }
1250
1251         status = ocfs2_super_lock(osb, 1);
1252         if (status < 0) {
1253                 mlog_errno(status);
1254                 goto leave;
1255         }
1256         unlock_super = 1;
1257
1258         /* This will load up the node map and add ourselves to it. */
1259         status = ocfs2_find_slot(osb);
1260         if (status < 0) {
1261                 mlog_errno(status);
1262                 goto leave;
1263         }
1264
1265         /* load all node-local system inodes */
1266         status = ocfs2_init_local_system_inodes(osb);
1267         if (status < 0) {
1268                 mlog_errno(status);
1269                 goto leave;
1270         }
1271
1272         status = ocfs2_check_volume(osb);
1273         if (status < 0) {
1274                 mlog_errno(status);
1275                 goto leave;
1276         }
1277
1278         status = ocfs2_truncate_log_init(osb);
1279         if (status < 0) {
1280                 mlog_errno(status);
1281                 goto leave;
1282         }
1283
1284         if (ocfs2_mount_local(osb))
1285                 goto leave;
1286
1287 leave:
1288         if (unlock_super)
1289                 ocfs2_super_unlock(osb, 1);
1290
1291         mlog_exit(status);
1292         return status;
1293 }
1294
1295 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1296 {
1297         int tmp, hangup_needed = 0;
1298         struct ocfs2_super *osb = NULL;
1299         char nodestr[8];
1300
1301         mlog_entry("(0x%p)\n", sb);
1302
1303         BUG_ON(!sb);
1304         osb = OCFS2_SB(sb);
1305         BUG_ON(!osb);
1306
1307         ocfs2_shutdown_local_alloc(osb);
1308
1309         ocfs2_truncate_log_shutdown(osb);
1310
1311         /* This will disable recovery and flush any recovery work. */
1312         ocfs2_recovery_exit(osb);
1313
1314         ocfs2_journal_shutdown(osb);
1315
1316         ocfs2_sync_blockdev(sb);
1317
1318         /* No cluster connection means we've failed during mount, so skip
1319          * all the steps which depended on that to complete. */
1320         if (osb->cconn) {
1321                 tmp = ocfs2_super_lock(osb, 1);
1322                 if (tmp < 0) {
1323                         mlog_errno(tmp);
1324                         return;
1325                 }
1326         }
1327
1328         if (osb->slot_num != OCFS2_INVALID_SLOT)
1329                 ocfs2_put_slot(osb);
1330
1331         if (osb->cconn)
1332                 ocfs2_super_unlock(osb, 1);
1333
1334         ocfs2_release_system_inodes(osb);
1335
1336         /*
1337          * If we're dismounting due to mount error, mount.ocfs2 will clean
1338          * up heartbeat.  If we're a local mount, there is no heartbeat.
1339          * If we failed before we got a uuid_str yet, we can't stop
1340          * heartbeat.  Otherwise, do it.
1341          */
1342         if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1343                 hangup_needed = 1;
1344
1345         if (osb->cconn)
1346                 ocfs2_dlm_shutdown(osb, hangup_needed);
1347
1348         debugfs_remove(osb->osb_debug_root);
1349
1350         if (hangup_needed)
1351                 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1352
1353         atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1354
1355         if (ocfs2_mount_local(osb))
1356                 snprintf(nodestr, sizeof(nodestr), "local");
1357         else
1358                 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1359
1360         printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1361                osb->dev_str, nodestr);
1362
1363         ocfs2_delete_osb(osb);
1364         kfree(osb);
1365         sb->s_dev = 0;
1366         sb->s_fs_info = NULL;
1367 }
1368
1369 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1370                                 unsigned uuid_bytes)
1371 {
1372         int i, ret;
1373         char *ptr;
1374
1375         BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1376
1377         osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1378         if (osb->uuid_str == NULL)
1379                 return -ENOMEM;
1380
1381         for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1382                 /* print with null */
1383                 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1384                 if (ret != 2) /* drop super cleans up */
1385                         return -EINVAL;
1386                 /* then only advance past the last char */
1387                 ptr += 2;
1388         }
1389
1390         return 0;
1391 }
1392
1393 static int ocfs2_initialize_super(struct super_block *sb,
1394                                   struct buffer_head *bh,
1395                                   int sector_size)
1396 {
1397         int status;
1398         int i, cbits, bbits;
1399         struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1400         struct inode *inode = NULL;
1401         struct ocfs2_journal *journal;
1402         __le32 uuid_net_key;
1403         struct ocfs2_super *osb;
1404
1405         mlog_entry_void();
1406
1407         osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1408         if (!osb) {
1409                 status = -ENOMEM;
1410                 mlog_errno(status);
1411                 goto bail;
1412         }
1413
1414         sb->s_fs_info = osb;
1415         sb->s_op = &ocfs2_sops;
1416         sb->s_export_op = &ocfs2_export_ops;
1417         sb->s_xattr = ocfs2_xattr_handlers;
1418         sb->s_time_gran = 1;
1419         sb->s_flags |= MS_NOATIME;
1420         /* this is needed to support O_LARGEFILE */
1421         cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1422         bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1423         sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1424
1425         osb->sb = sb;
1426         /* Save off for ocfs2_rw_direct */
1427         osb->s_sectsize_bits = blksize_bits(sector_size);
1428         BUG_ON(!osb->s_sectsize_bits);
1429
1430         spin_lock_init(&osb->dc_task_lock);
1431         init_waitqueue_head(&osb->dc_event);
1432         osb->dc_work_sequence = 0;
1433         osb->dc_wake_sequence = 0;
1434         INIT_LIST_HEAD(&osb->blocked_lock_list);
1435         osb->blocked_lock_count = 0;
1436         spin_lock_init(&osb->osb_lock);
1437         ocfs2_init_inode_steal_slot(osb);
1438
1439         atomic_set(&osb->alloc_stats.moves, 0);
1440         atomic_set(&osb->alloc_stats.local_data, 0);
1441         atomic_set(&osb->alloc_stats.bitmap_data, 0);
1442         atomic_set(&osb->alloc_stats.bg_allocs, 0);
1443         atomic_set(&osb->alloc_stats.bg_extends, 0);
1444
1445         ocfs2_init_node_maps(osb);
1446
1447         snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1448                  MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1449
1450         status = ocfs2_recovery_init(osb);
1451         if (status) {
1452                 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1453                 mlog_errno(status);
1454                 goto bail;
1455         }
1456
1457         init_waitqueue_head(&osb->checkpoint_event);
1458         atomic_set(&osb->needs_checkpoint, 0);
1459
1460         osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1461
1462         osb->slot_num = OCFS2_INVALID_SLOT;
1463
1464         osb->s_xattr_inline_size = le16_to_cpu(
1465                                         di->id2.i_super.s_xattr_inline_size);
1466
1467         osb->local_alloc_state = OCFS2_LA_UNUSED;
1468         osb->local_alloc_bh = NULL;
1469         INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
1470
1471         init_waitqueue_head(&osb->osb_mount_event);
1472
1473         osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1474         if (!osb->vol_label) {
1475                 mlog(ML_ERROR, "unable to alloc vol label\n");
1476                 status = -ENOMEM;
1477                 goto bail;
1478         }
1479
1480         osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1481         if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1482                 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1483                      osb->max_slots);
1484                 status = -EINVAL;
1485                 goto bail;
1486         }
1487         mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1488
1489         osb->slot_recovery_generations =
1490                 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1491                         GFP_KERNEL);
1492         if (!osb->slot_recovery_generations) {
1493                 status = -ENOMEM;
1494                 mlog_errno(status);
1495                 goto bail;
1496         }
1497
1498         init_waitqueue_head(&osb->osb_wipe_event);
1499         osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1500                                         sizeof(*osb->osb_orphan_wipes),
1501                                         GFP_KERNEL);
1502         if (!osb->osb_orphan_wipes) {
1503                 status = -ENOMEM;
1504                 mlog_errno(status);
1505                 goto bail;
1506         }
1507
1508         osb->s_feature_compat =
1509                 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1510         osb->s_feature_ro_compat =
1511                 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1512         osb->s_feature_incompat =
1513                 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1514
1515         if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1516                 mlog(ML_ERROR, "couldn't mount because of unsupported "
1517                      "optional features (%x).\n", i);
1518                 status = -EINVAL;
1519                 goto bail;
1520         }
1521         if (!(osb->sb->s_flags & MS_RDONLY) &&
1522             (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1523                 mlog(ML_ERROR, "couldn't mount RDWR because of "
1524                      "unsupported optional features (%x).\n", i);
1525                 status = -EINVAL;
1526                 goto bail;
1527         }
1528
1529         if (ocfs2_userspace_stack(osb)) {
1530                 memcpy(osb->osb_cluster_stack,
1531                        OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1532                        OCFS2_STACK_LABEL_LEN);
1533                 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1534                 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1535                         mlog(ML_ERROR,
1536                              "couldn't mount because of an invalid "
1537                              "cluster stack label (%s) \n",
1538                              osb->osb_cluster_stack);
1539                         status = -EINVAL;
1540                         goto bail;
1541                 }
1542         } else {
1543                 /* The empty string is identical with classic tools that
1544                  * don't know about s_cluster_info. */
1545                 osb->osb_cluster_stack[0] = '\0';
1546         }
1547
1548         get_random_bytes(&osb->s_next_generation, sizeof(u32));
1549
1550         /* FIXME
1551          * This should be done in ocfs2_journal_init(), but unknown
1552          * ordering issues will cause the filesystem to crash.
1553          * If anyone wants to figure out what part of the code
1554          * refers to osb->journal before ocfs2_journal_init() is run,
1555          * be my guest.
1556          */
1557         /* initialize our journal structure */
1558
1559         journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
1560         if (!journal) {
1561                 mlog(ML_ERROR, "unable to alloc journal\n");
1562                 status = -ENOMEM;
1563                 goto bail;
1564         }
1565         osb->journal = journal;
1566         journal->j_osb = osb;
1567
1568         atomic_set(&journal->j_num_trans, 0);
1569         init_rwsem(&journal->j_trans_barrier);
1570         init_waitqueue_head(&journal->j_checkpointed);
1571         spin_lock_init(&journal->j_lock);
1572         journal->j_trans_id = (unsigned long) 1;
1573         INIT_LIST_HEAD(&journal->j_la_cleanups);
1574         INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1575         journal->j_state = OCFS2_JOURNAL_FREE;
1576
1577         /* get some pseudo constants for clustersize bits */
1578         osb->s_clustersize_bits =
1579                 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1580         osb->s_clustersize = 1 << osb->s_clustersize_bits;
1581         mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1582
1583         if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1584             osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1585                 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1586                      osb->s_clustersize);
1587                 status = -EINVAL;
1588                 goto bail;
1589         }
1590
1591         if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1592             > (u32)~0UL) {
1593                 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1594                      "what jbd can address in 32 bits.\n");
1595                 status = -EINVAL;
1596                 goto bail;
1597         }
1598
1599         if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1600                                  sizeof(di->id2.i_super.s_uuid))) {
1601                 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1602                 status = -ENOMEM;
1603                 goto bail;
1604         }
1605
1606         memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1607
1608         strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1609         osb->vol_label[63] = '\0';
1610         osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1611         osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1612         osb->first_cluster_group_blkno =
1613                 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1614         osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1615         osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1616         mlog(0, "vol_label: %s\n", osb->vol_label);
1617         mlog(0, "uuid: %s\n", osb->uuid_str);
1618         mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1619              (unsigned long long)osb->root_blkno,
1620              (unsigned long long)osb->system_dir_blkno);
1621
1622         osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1623         if (!osb->osb_dlm_debug) {
1624                 status = -ENOMEM;
1625                 mlog_errno(status);
1626                 goto bail;
1627         }
1628
1629         atomic_set(&osb->vol_state, VOLUME_INIT);
1630
1631         /* load root, system_dir, and all global system inodes */
1632         status = ocfs2_init_global_system_inodes(osb);
1633         if (status < 0) {
1634                 mlog_errno(status);
1635                 goto bail;
1636         }
1637
1638         /*
1639          * global bitmap
1640          */
1641         inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1642                                             OCFS2_INVALID_SLOT);
1643         if (!inode) {
1644                 status = -EINVAL;
1645                 mlog_errno(status);
1646                 goto bail;
1647         }
1648
1649         osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1650         iput(inode);
1651
1652         osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
1653
1654         status = ocfs2_init_slot_info(osb);
1655         if (status < 0) {
1656                 mlog_errno(status);
1657                 goto bail;
1658         }
1659
1660 bail:
1661         mlog_exit(status);
1662         return status;
1663 }
1664
1665 /*
1666  * will return: -EAGAIN if it is ok to keep searching for superblocks
1667  *              -EINVAL if there is a bad superblock
1668  *              0 on success
1669  */
1670 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1671                                struct buffer_head *bh,
1672                                u32 blksz)
1673 {
1674         int status = -EAGAIN;
1675
1676         mlog_entry_void();
1677
1678         if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1679                    strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1680                 status = -EINVAL;
1681                 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1682                         mlog(ML_ERROR, "found superblock with incorrect block "
1683                              "size: found %u, should be %u\n",
1684                              1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1685                                blksz);
1686                 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1687                            OCFS2_MAJOR_REV_LEVEL ||
1688                            le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1689                            OCFS2_MINOR_REV_LEVEL) {
1690                         mlog(ML_ERROR, "found superblock with bad version: "
1691                              "found %u.%u, should be %u.%u\n",
1692                              le16_to_cpu(di->id2.i_super.s_major_rev_level),
1693                              le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1694                              OCFS2_MAJOR_REV_LEVEL,
1695                              OCFS2_MINOR_REV_LEVEL);
1696                 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1697                         mlog(ML_ERROR, "bad block number on superblock: "
1698                              "found %llu, should be %llu\n",
1699                              (unsigned long long)le64_to_cpu(di->i_blkno),
1700                              (unsigned long long)bh->b_blocknr);
1701                 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1702                             le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1703                         mlog(ML_ERROR, "bad cluster size found: %u\n",
1704                              1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1705                 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1706                         mlog(ML_ERROR, "bad root_blkno: 0\n");
1707                 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1708                         mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1709                 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1710                         mlog(ML_ERROR,
1711                              "Superblock slots found greater than file system "
1712                              "maximum: found %u, max %u\n",
1713                              le16_to_cpu(di->id2.i_super.s_max_slots),
1714                              OCFS2_MAX_SLOTS);
1715                 } else {
1716                         /* found it! */
1717                         status = 0;
1718                 }
1719         }
1720
1721         mlog_exit(status);
1722         return status;
1723 }
1724
1725 static int ocfs2_check_volume(struct ocfs2_super *osb)
1726 {
1727         int status;
1728         int dirty;
1729         int local;
1730         struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1731                                                   * recover
1732                                                   * ourselves. */
1733
1734         mlog_entry_void();
1735
1736         /* Init our journal object. */
1737         status = ocfs2_journal_init(osb->journal, &dirty);
1738         if (status < 0) {
1739                 mlog(ML_ERROR, "Could not initialize journal!\n");
1740                 goto finally;
1741         }
1742
1743         /* If the journal was unmounted cleanly then we don't want to
1744          * recover anything. Otherwise, journal_load will do that
1745          * dirty work for us :) */
1746         if (!dirty) {
1747                 status = ocfs2_journal_wipe(osb->journal, 0);
1748                 if (status < 0) {
1749                         mlog_errno(status);
1750                         goto finally;
1751                 }
1752         } else {
1753                 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1754                      "recovering volume.\n");
1755         }
1756
1757         local = ocfs2_mount_local(osb);
1758
1759         /* will play back anything left in the journal. */
1760         status = ocfs2_journal_load(osb->journal, local, dirty);
1761         if (status < 0) {
1762                 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
1763                 goto finally;
1764         }
1765
1766         if (dirty) {
1767                 /* recover my local alloc if we didn't unmount cleanly. */
1768                 status = ocfs2_begin_local_alloc_recovery(osb,
1769                                                           osb->slot_num,
1770                                                           &local_alloc);
1771                 if (status < 0) {
1772                         mlog_errno(status);
1773                         goto finally;
1774                 }
1775                 /* we complete the recovery process after we've marked
1776                  * ourselves as mounted. */
1777         }
1778
1779         mlog(0, "Journal loaded.\n");
1780
1781         status = ocfs2_load_local_alloc(osb);
1782         if (status < 0) {
1783                 mlog_errno(status);
1784                 goto finally;
1785         }
1786
1787         if (dirty) {
1788                 /* Recovery will be completed after we've mounted the
1789                  * rest of the volume. */
1790                 osb->dirty = 1;
1791                 osb->local_alloc_copy = local_alloc;
1792                 local_alloc = NULL;
1793         }
1794
1795         /* go through each journal, trylock it and if you get the
1796          * lock, and it's marked as dirty, set the bit in the recover
1797          * map and launch a recovery thread for it. */
1798         status = ocfs2_mark_dead_nodes(osb);
1799         if (status < 0)
1800                 mlog_errno(status);
1801
1802 finally:
1803         if (local_alloc)
1804                 kfree(local_alloc);
1805
1806         mlog_exit(status);
1807         return status;
1808 }
1809
1810 /*
1811  * The routine gets called from dismount or close whenever a dismount on
1812  * volume is requested and the osb open count becomes 1.
1813  * It will remove the osb from the global list and also free up all the
1814  * initialized resources and fileobject.
1815  */
1816 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1817 {
1818         mlog_entry_void();
1819
1820         /* This function assumes that the caller has the main osb resource */
1821
1822         ocfs2_free_slot_info(osb);
1823
1824         kfree(osb->osb_orphan_wipes);
1825         kfree(osb->slot_recovery_generations);
1826         /* FIXME
1827          * This belongs in journal shutdown, but because we have to
1828          * allocate osb->journal at the start of ocfs2_initalize_osb(),
1829          * we free it here.
1830          */
1831         kfree(osb->journal);
1832         if (osb->local_alloc_copy)
1833                 kfree(osb->local_alloc_copy);
1834         kfree(osb->uuid_str);
1835         ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1836         memset(osb, 0, sizeof(struct ocfs2_super));
1837
1838         mlog_exit_void();
1839 }
1840
1841 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1842  * panic(). We do not support continue-on-error operation. */
1843 static void ocfs2_handle_error(struct super_block *sb)
1844 {
1845         struct ocfs2_super *osb = OCFS2_SB(sb);
1846
1847         if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1848                 panic("OCFS2: (device %s): panic forced after error\n",
1849                       sb->s_id);
1850
1851         ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1852
1853         if (sb->s_flags & MS_RDONLY &&
1854             (ocfs2_is_soft_readonly(osb) ||
1855              ocfs2_is_hard_readonly(osb)))
1856                 return;
1857
1858         printk(KERN_CRIT "File system is now read-only due to the potential "
1859                "of on-disk corruption. Please run fsck.ocfs2 once the file "
1860                "system is unmounted.\n");
1861         sb->s_flags |= MS_RDONLY;
1862         ocfs2_set_ro_flag(osb, 0);
1863 }
1864
1865 static char error_buf[1024];
1866
1867 void __ocfs2_error(struct super_block *sb,
1868                    const char *function,
1869                    const char *fmt, ...)
1870 {
1871         va_list args;
1872
1873         va_start(args, fmt);
1874         vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1875         va_end(args);
1876
1877         /* Not using mlog here because we want to show the actual
1878          * function the error came from. */
1879         printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1880                sb->s_id, function, error_buf);
1881
1882         ocfs2_handle_error(sb);
1883 }
1884
1885 /* Handle critical errors. This is intentionally more drastic than
1886  * ocfs2_handle_error, so we only use for things like journal errors,
1887  * etc. */
1888 void __ocfs2_abort(struct super_block* sb,
1889                    const char *function,
1890                    const char *fmt, ...)
1891 {
1892         va_list args;
1893
1894         va_start(args, fmt);
1895         vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1896         va_end(args);
1897
1898         printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1899                sb->s_id, function, error_buf);
1900
1901         /* We don't have the cluster support yet to go straight to
1902          * hard readonly in here. Until then, we want to keep
1903          * ocfs2_abort() so that we can at least mark critical
1904          * errors.
1905          *
1906          * TODO: This should abort the journal and alert other nodes
1907          * that our slot needs recovery. */
1908
1909         /* Force a panic(). This stinks, but it's better than letting
1910          * things continue without having a proper hard readonly
1911          * here. */
1912         OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1913         ocfs2_handle_error(sb);
1914 }
1915
1916 module_init(ocfs2_init);
1917 module_exit(ocfs2_exit);