Merge tag 'kvmarm-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm...
[linux-2.6-microblaze.git] / fs / ocfs2 / super.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8; -*-
3  * vim: noexpandtab sw=8 ts=8 sts=0:
4  *
5  * super.c
6  *
7  * load/unload driver, mount/dismount volumes
8  *
9  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
10  */
11
12 #include <linux/module.h>
13 #include <linux/fs.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/highmem.h>
17 #include <linux/init.h>
18 #include <linux/random.h>
19 #include <linux/statfs.h>
20 #include <linux/moduleparam.h>
21 #include <linux/blkdev.h>
22 #include <linux/socket.h>
23 #include <linux/inet.h>
24 #include <linux/parser.h>
25 #include <linux/crc32.h>
26 #include <linux/debugfs.h>
27 #include <linux/mount.h>
28 #include <linux/seq_file.h>
29 #include <linux/quotaops.h>
30 #include <linux/cleancache.h>
31 #include <linux/signal.h>
32
33 #define CREATE_TRACE_POINTS
34 #include "ocfs2_trace.h"
35
36 #include <cluster/masklog.h>
37
38 #include "ocfs2.h"
39
40 /* this should be the only file to include a version 1 header */
41 #include "ocfs1_fs_compat.h"
42
43 #include "alloc.h"
44 #include "aops.h"
45 #include "blockcheck.h"
46 #include "dlmglue.h"
47 #include "export.h"
48 #include "extent_map.h"
49 #include "heartbeat.h"
50 #include "inode.h"
51 #include "journal.h"
52 #include "localalloc.h"
53 #include "namei.h"
54 #include "slot_map.h"
55 #include "super.h"
56 #include "sysfile.h"
57 #include "uptodate.h"
58 #include "xattr.h"
59 #include "quota.h"
60 #include "refcounttree.h"
61 #include "suballoc.h"
62
63 #include "buffer_head_io.h"
64 #include "filecheck.h"
65
66 static struct kmem_cache *ocfs2_inode_cachep;
67 struct kmem_cache *ocfs2_dquot_cachep;
68 struct kmem_cache *ocfs2_qf_chunk_cachep;
69
70 static struct dentry *ocfs2_debugfs_root;
71
72 MODULE_AUTHOR("Oracle");
73 MODULE_LICENSE("GPL");
74 MODULE_DESCRIPTION("OCFS2 cluster file system");
75
76 struct mount_options
77 {
78         unsigned long   commit_interval;
79         unsigned long   mount_opt;
80         unsigned int    atime_quantum;
81         signed short    slot;
82         int             localalloc_opt;
83         unsigned int    resv_level;
84         int             dir_resv_level;
85         char            cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
86 };
87
88 static int ocfs2_parse_options(struct super_block *sb, char *options,
89                                struct mount_options *mopt,
90                                int is_remount);
91 static int ocfs2_check_set_options(struct super_block *sb,
92                                    struct mount_options *options);
93 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
94 static void ocfs2_put_super(struct super_block *sb);
95 static int ocfs2_mount_volume(struct super_block *sb);
96 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
97 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
98 static int ocfs2_initialize_mem_caches(void);
99 static void ocfs2_free_mem_caches(void);
100 static void ocfs2_delete_osb(struct ocfs2_super *osb);
101
102 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
103
104 static int ocfs2_sync_fs(struct super_block *sb, int wait);
105
106 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
107 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
108 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
109 static int ocfs2_check_volume(struct ocfs2_super *osb);
110 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
111                                struct buffer_head *bh,
112                                u32 sectsize,
113                                struct ocfs2_blockcheck_stats *stats);
114 static int ocfs2_initialize_super(struct super_block *sb,
115                                   struct buffer_head *bh,
116                                   int sector_size,
117                                   struct ocfs2_blockcheck_stats *stats);
118 static int ocfs2_get_sector(struct super_block *sb,
119                             struct buffer_head **bh,
120                             int block,
121                             int sect_size);
122 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
123 static void ocfs2_free_inode(struct inode *inode);
124 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
125 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
126 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
127
128 static struct dquot **ocfs2_get_dquots(struct inode *inode)
129 {
130         return OCFS2_I(inode)->i_dquot;
131 }
132
133 static const struct super_operations ocfs2_sops = {
134         .statfs         = ocfs2_statfs,
135         .alloc_inode    = ocfs2_alloc_inode,
136         .free_inode     = ocfs2_free_inode,
137         .drop_inode     = ocfs2_drop_inode,
138         .evict_inode    = ocfs2_evict_inode,
139         .sync_fs        = ocfs2_sync_fs,
140         .put_super      = ocfs2_put_super,
141         .remount_fs     = ocfs2_remount,
142         .show_options   = ocfs2_show_options,
143         .quota_read     = ocfs2_quota_read,
144         .quota_write    = ocfs2_quota_write,
145         .get_dquots     = ocfs2_get_dquots,
146 };
147
148 enum {
149         Opt_barrier,
150         Opt_err_panic,
151         Opt_err_ro,
152         Opt_intr,
153         Opt_nointr,
154         Opt_hb_none,
155         Opt_hb_local,
156         Opt_hb_global,
157         Opt_data_ordered,
158         Opt_data_writeback,
159         Opt_atime_quantum,
160         Opt_slot,
161         Opt_commit,
162         Opt_localalloc,
163         Opt_localflocks,
164         Opt_stack,
165         Opt_user_xattr,
166         Opt_nouser_xattr,
167         Opt_inode64,
168         Opt_acl,
169         Opt_noacl,
170         Opt_usrquota,
171         Opt_grpquota,
172         Opt_coherency_buffered,
173         Opt_coherency_full,
174         Opt_resv_level,
175         Opt_dir_resv_level,
176         Opt_journal_async_commit,
177         Opt_err_cont,
178         Opt_err,
179 };
180
181 static const match_table_t tokens = {
182         {Opt_barrier, "barrier=%u"},
183         {Opt_err_panic, "errors=panic"},
184         {Opt_err_ro, "errors=remount-ro"},
185         {Opt_intr, "intr"},
186         {Opt_nointr, "nointr"},
187         {Opt_hb_none, OCFS2_HB_NONE},
188         {Opt_hb_local, OCFS2_HB_LOCAL},
189         {Opt_hb_global, OCFS2_HB_GLOBAL},
190         {Opt_data_ordered, "data=ordered"},
191         {Opt_data_writeback, "data=writeback"},
192         {Opt_atime_quantum, "atime_quantum=%u"},
193         {Opt_slot, "preferred_slot=%u"},
194         {Opt_commit, "commit=%u"},
195         {Opt_localalloc, "localalloc=%d"},
196         {Opt_localflocks, "localflocks"},
197         {Opt_stack, "cluster_stack=%s"},
198         {Opt_user_xattr, "user_xattr"},
199         {Opt_nouser_xattr, "nouser_xattr"},
200         {Opt_inode64, "inode64"},
201         {Opt_acl, "acl"},
202         {Opt_noacl, "noacl"},
203         {Opt_usrquota, "usrquota"},
204         {Opt_grpquota, "grpquota"},
205         {Opt_coherency_buffered, "coherency=buffered"},
206         {Opt_coherency_full, "coherency=full"},
207         {Opt_resv_level, "resv_level=%u"},
208         {Opt_dir_resv_level, "dir_resv_level=%u"},
209         {Opt_journal_async_commit, "journal_async_commit"},
210         {Opt_err_cont, "errors=continue"},
211         {Opt_err, NULL}
212 };
213
214 #ifdef CONFIG_DEBUG_FS
215 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
216 {
217         struct ocfs2_cluster_connection *cconn = osb->cconn;
218         struct ocfs2_recovery_map *rm = osb->recovery_map;
219         struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
220         int i, out = 0;
221         unsigned long flags;
222
223         out += scnprintf(buf + out, len - out,
224                         "%10s => Id: %-s  Uuid: %-s  Gen: 0x%X  Label: %-s\n",
225                         "Device", osb->dev_str, osb->uuid_str,
226                         osb->fs_generation, osb->vol_label);
227
228         out += scnprintf(buf + out, len - out,
229                         "%10s => State: %d  Flags: 0x%lX\n", "Volume",
230                         atomic_read(&osb->vol_state), osb->osb_flags);
231
232         out += scnprintf(buf + out, len - out,
233                         "%10s => Block: %lu  Cluster: %d\n", "Sizes",
234                         osb->sb->s_blocksize, osb->s_clustersize);
235
236         out += scnprintf(buf + out, len - out,
237                         "%10s => Compat: 0x%X  Incompat: 0x%X  "
238                         "ROcompat: 0x%X\n",
239                         "Features", osb->s_feature_compat,
240                         osb->s_feature_incompat, osb->s_feature_ro_compat);
241
242         out += scnprintf(buf + out, len - out,
243                         "%10s => Opts: 0x%lX  AtimeQuanta: %u\n", "Mount",
244                         osb->s_mount_opt, osb->s_atime_quantum);
245
246         if (cconn) {
247                 out += scnprintf(buf + out, len - out,
248                                 "%10s => Stack: %s  Name: %*s  "
249                                 "Version: %d.%d\n", "Cluster",
250                                 (*osb->osb_cluster_stack == '\0' ?
251                                  "o2cb" : osb->osb_cluster_stack),
252                                 cconn->cc_namelen, cconn->cc_name,
253                                 cconn->cc_version.pv_major,
254                                 cconn->cc_version.pv_minor);
255         }
256
257         spin_lock_irqsave(&osb->dc_task_lock, flags);
258         out += scnprintf(buf + out, len - out,
259                         "%10s => Pid: %d  Count: %lu  WakeSeq: %lu  "
260                         "WorkSeq: %lu\n", "DownCnvt",
261                         (osb->dc_task ?  task_pid_nr(osb->dc_task) : -1),
262                         osb->blocked_lock_count, osb->dc_wake_sequence,
263                         osb->dc_work_sequence);
264         spin_unlock_irqrestore(&osb->dc_task_lock, flags);
265
266         spin_lock(&osb->osb_lock);
267         out += scnprintf(buf + out, len - out, "%10s => Pid: %d  Nodes:",
268                         "Recovery",
269                         (osb->recovery_thread_task ?
270                          task_pid_nr(osb->recovery_thread_task) : -1));
271         if (rm->rm_used == 0)
272                 out += scnprintf(buf + out, len - out, " None\n");
273         else {
274                 for (i = 0; i < rm->rm_used; i++)
275                         out += scnprintf(buf + out, len - out, " %d",
276                                         rm->rm_entries[i]);
277                 out += scnprintf(buf + out, len - out, "\n");
278         }
279         spin_unlock(&osb->osb_lock);
280
281         out += scnprintf(buf + out, len - out,
282                         "%10s => Pid: %d  Interval: %lu\n", "Commit",
283                         (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
284                         osb->osb_commit_interval);
285
286         out += scnprintf(buf + out, len - out,
287                         "%10s => State: %d  TxnId: %lu  NumTxns: %d\n",
288                         "Journal", osb->journal->j_state,
289                         osb->journal->j_trans_id,
290                         atomic_read(&osb->journal->j_num_trans));
291
292         out += scnprintf(buf + out, len - out,
293                         "%10s => GlobalAllocs: %d  LocalAllocs: %d  "
294                         "SubAllocs: %d  LAWinMoves: %d  SAExtends: %d\n",
295                         "Stats",
296                         atomic_read(&osb->alloc_stats.bitmap_data),
297                         atomic_read(&osb->alloc_stats.local_data),
298                         atomic_read(&osb->alloc_stats.bg_allocs),
299                         atomic_read(&osb->alloc_stats.moves),
300                         atomic_read(&osb->alloc_stats.bg_extends));
301
302         out += scnprintf(buf + out, len - out,
303                         "%10s => State: %u  Descriptor: %llu  Size: %u bits  "
304                         "Default: %u bits\n",
305                         "LocalAlloc", osb->local_alloc_state,
306                         (unsigned long long)osb->la_last_gd,
307                         osb->local_alloc_bits, osb->local_alloc_default_bits);
308
309         spin_lock(&osb->osb_lock);
310         out += scnprintf(buf + out, len - out,
311                         "%10s => InodeSlot: %d  StolenInodes: %d, "
312                         "MetaSlot: %d  StolenMeta: %d\n", "Steal",
313                         osb->s_inode_steal_slot,
314                         atomic_read(&osb->s_num_inodes_stolen),
315                         osb->s_meta_steal_slot,
316                         atomic_read(&osb->s_num_meta_stolen));
317         spin_unlock(&osb->osb_lock);
318
319         out += scnprintf(buf + out, len - out, "OrphanScan => ");
320         out += scnprintf(buf + out, len - out, "Local: %u  Global: %u ",
321                         os->os_count, os->os_seqno);
322         out += scnprintf(buf + out, len - out, " Last Scan: ");
323         if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
324                 out += scnprintf(buf + out, len - out, "Disabled\n");
325         else
326                 out += scnprintf(buf + out, len - out, "%lu seconds ago\n",
327                                 (unsigned long)(ktime_get_seconds() - os->os_scantime));
328
329         out += scnprintf(buf + out, len - out, "%10s => %3s  %10s\n",
330                         "Slots", "Num", "RecoGen");
331         for (i = 0; i < osb->max_slots; ++i) {
332                 out += scnprintf(buf + out, len - out,
333                                 "%10s  %c %3d  %10d\n",
334                                 " ",
335                                 (i == osb->slot_num ? '*' : ' '),
336                                 i, osb->slot_recovery_generations[i]);
337         }
338
339         return out;
340 }
341
342 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
343 {
344         struct ocfs2_super *osb = inode->i_private;
345         char *buf = NULL;
346
347         buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
348         if (!buf)
349                 goto bail;
350
351         i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
352
353         file->private_data = buf;
354
355         return 0;
356 bail:
357         return -ENOMEM;
358 }
359
360 static int ocfs2_debug_release(struct inode *inode, struct file *file)
361 {
362         kfree(file->private_data);
363         return 0;
364 }
365
366 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
367                                 size_t nbytes, loff_t *ppos)
368 {
369         return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
370                                        i_size_read(file->f_mapping->host));
371 }
372 #else
373 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
374 {
375         return 0;
376 }
377 static int ocfs2_debug_release(struct inode *inode, struct file *file)
378 {
379         return 0;
380 }
381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382                                 size_t nbytes, loff_t *ppos)
383 {
384         return 0;
385 }
386 #endif  /* CONFIG_DEBUG_FS */
387
388 static const struct file_operations ocfs2_osb_debug_fops = {
389         .open =         ocfs2_osb_debug_open,
390         .release =      ocfs2_debug_release,
391         .read =         ocfs2_debug_read,
392         .llseek =       generic_file_llseek,
393 };
394
395 static int ocfs2_sync_fs(struct super_block *sb, int wait)
396 {
397         int status;
398         tid_t target;
399         struct ocfs2_super *osb = OCFS2_SB(sb);
400
401         if (ocfs2_is_hard_readonly(osb))
402                 return -EROFS;
403
404         if (wait) {
405                 status = ocfs2_flush_truncate_log(osb);
406                 if (status < 0)
407                         mlog_errno(status);
408         } else {
409                 ocfs2_schedule_truncate_log_flush(osb, 0);
410         }
411
412         if (jbd2_journal_start_commit(osb->journal->j_journal,
413                                       &target)) {
414                 if (wait)
415                         jbd2_log_wait_commit(osb->journal->j_journal,
416                                              target);
417         }
418         return 0;
419 }
420
421 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
422 {
423         if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
424             && (ino == USER_QUOTA_SYSTEM_INODE
425                 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
426                 return 0;
427         if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
428             && (ino == GROUP_QUOTA_SYSTEM_INODE
429                 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
430                 return 0;
431         return 1;
432 }
433
434 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
435 {
436         struct inode *new = NULL;
437         int status = 0;
438         int i;
439
440         new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
441         if (IS_ERR(new)) {
442                 status = PTR_ERR(new);
443                 mlog_errno(status);
444                 goto bail;
445         }
446         osb->root_inode = new;
447
448         new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449         if (IS_ERR(new)) {
450                 status = PTR_ERR(new);
451                 mlog_errno(status);
452                 goto bail;
453         }
454         osb->sys_root_inode = new;
455
456         for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
457              i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
458                 if (!ocfs2_need_system_inode(osb, i))
459                         continue;
460                 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
461                 if (!new) {
462                         ocfs2_release_system_inodes(osb);
463                         status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
464                         mlog_errno(status);
465                         mlog(ML_ERROR, "Unable to load system inode %d, "
466                              "possibly corrupt fs?", i);
467                         goto bail;
468                 }
469                 // the array now has one ref, so drop this one
470                 iput(new);
471         }
472
473 bail:
474         if (status)
475                 mlog_errno(status);
476         return status;
477 }
478
479 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
480 {
481         struct inode *new = NULL;
482         int status = 0;
483         int i;
484
485         for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
486              i < NUM_SYSTEM_INODES;
487              i++) {
488                 if (!ocfs2_need_system_inode(osb, i))
489                         continue;
490                 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
491                 if (!new) {
492                         ocfs2_release_system_inodes(osb);
493                         status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
494                         mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
495                              status, i, osb->slot_num);
496                         goto bail;
497                 }
498                 /* the array now has one ref, so drop this one */
499                 iput(new);
500         }
501
502 bail:
503         if (status)
504                 mlog_errno(status);
505         return status;
506 }
507
508 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
509 {
510         int i;
511         struct inode *inode;
512
513         for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
514                 inode = osb->global_system_inodes[i];
515                 if (inode) {
516                         iput(inode);
517                         osb->global_system_inodes[i] = NULL;
518                 }
519         }
520
521         inode = osb->sys_root_inode;
522         if (inode) {
523                 iput(inode);
524                 osb->sys_root_inode = NULL;
525         }
526
527         inode = osb->root_inode;
528         if (inode) {
529                 iput(inode);
530                 osb->root_inode = NULL;
531         }
532
533         if (!osb->local_system_inodes)
534                 return;
535
536         for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
537                 if (osb->local_system_inodes[i]) {
538                         iput(osb->local_system_inodes[i]);
539                         osb->local_system_inodes[i] = NULL;
540                 }
541         }
542
543         kfree(osb->local_system_inodes);
544         osb->local_system_inodes = NULL;
545 }
546
547 /* We're allocating fs objects, use GFP_NOFS */
548 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
549 {
550         struct ocfs2_inode_info *oi;
551
552         oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
553         if (!oi)
554                 return NULL;
555
556         oi->i_sync_tid = 0;
557         oi->i_datasync_tid = 0;
558         memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
559
560         jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
561         return &oi->vfs_inode;
562 }
563
564 static void ocfs2_free_inode(struct inode *inode)
565 {
566         kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
567 }
568
569 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
570                                                 unsigned int cbits)
571 {
572         unsigned int bytes = 1 << cbits;
573         unsigned int trim = bytes;
574         unsigned int bitshift = 32;
575
576         /*
577          * i_size and all block offsets in ocfs2 are always 64 bits
578          * wide. i_clusters is 32 bits, in cluster-sized units. So on
579          * 64 bit platforms, cluster size will be the limiting factor.
580          */
581
582 #if BITS_PER_LONG == 32
583         BUILD_BUG_ON(sizeof(sector_t) != 8);
584         /*
585          * We might be limited by page cache size.
586          */
587         if (bytes > PAGE_SIZE) {
588                 bytes = PAGE_SIZE;
589                 trim = 1;
590                 /*
591                  * Shift by 31 here so that we don't get larger than
592                  * MAX_LFS_FILESIZE
593                  */
594                 bitshift = 31;
595         }
596 #endif
597
598         /*
599          * Trim by a whole cluster when we can actually approach the
600          * on-disk limits. Otherwise we can overflow i_clusters when
601          * an extent start is at the max offset.
602          */
603         return (((unsigned long long)bytes) << bitshift) - trim;
604 }
605
606 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
607 {
608         int incompat_features;
609         int ret = 0;
610         struct mount_options parsed_options;
611         struct ocfs2_super *osb = OCFS2_SB(sb);
612         u32 tmp;
613
614         sync_filesystem(sb);
615
616         if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
617             !ocfs2_check_set_options(sb, &parsed_options)) {
618                 ret = -EINVAL;
619                 goto out;
620         }
621
622         tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
623                 OCFS2_MOUNT_HB_NONE;
624         if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
625                 ret = -EINVAL;
626                 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
627                 goto out;
628         }
629
630         if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
631             (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
632                 ret = -EINVAL;
633                 mlog(ML_ERROR, "Cannot change data mode on remount\n");
634                 goto out;
635         }
636
637         /* Probably don't want this on remount; it might
638          * mess with other nodes */
639         if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
640             (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
641                 ret = -EINVAL;
642                 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
643                 goto out;
644         }
645
646         /* We're going to/from readonly mode. */
647         if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
648                 /* Disable quota accounting before remounting RO */
649                 if (*flags & SB_RDONLY) {
650                         ret = ocfs2_susp_quotas(osb, 0);
651                         if (ret < 0)
652                                 goto out;
653                 }
654                 /* Lock here so the check of HARD_RO and the potential
655                  * setting of SOFT_RO is atomic. */
656                 spin_lock(&osb->osb_lock);
657                 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
658                         mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
659                         ret = -EROFS;
660                         goto unlock_osb;
661                 }
662
663                 if (*flags & SB_RDONLY) {
664                         sb->s_flags |= SB_RDONLY;
665                         osb->osb_flags |= OCFS2_OSB_SOFT_RO;
666                 } else {
667                         if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
668                                 mlog(ML_ERROR, "Cannot remount RDWR "
669                                      "filesystem due to previous errors.\n");
670                                 ret = -EROFS;
671                                 goto unlock_osb;
672                         }
673                         incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
674                         if (incompat_features) {
675                                 mlog(ML_ERROR, "Cannot remount RDWR because "
676                                      "of unsupported optional features "
677                                      "(%x).\n", incompat_features);
678                                 ret = -EINVAL;
679                                 goto unlock_osb;
680                         }
681                         sb->s_flags &= ~SB_RDONLY;
682                         osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
683                 }
684                 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
685 unlock_osb:
686                 spin_unlock(&osb->osb_lock);
687                 /* Enable quota accounting after remounting RW */
688                 if (!ret && !(*flags & SB_RDONLY)) {
689                         if (sb_any_quota_suspended(sb))
690                                 ret = ocfs2_susp_quotas(osb, 1);
691                         else
692                                 ret = ocfs2_enable_quotas(osb);
693                         if (ret < 0) {
694                                 /* Return back changes... */
695                                 spin_lock(&osb->osb_lock);
696                                 sb->s_flags |= SB_RDONLY;
697                                 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
698                                 spin_unlock(&osb->osb_lock);
699                                 goto out;
700                         }
701                 }
702         }
703
704         if (!ret) {
705                 /* Only save off the new mount options in case of a successful
706                  * remount. */
707                 osb->s_mount_opt = parsed_options.mount_opt;
708                 osb->s_atime_quantum = parsed_options.atime_quantum;
709                 osb->preferred_slot = parsed_options.slot;
710                 if (parsed_options.commit_interval)
711                         osb->osb_commit_interval = parsed_options.commit_interval;
712
713                 if (!ocfs2_is_hard_readonly(osb))
714                         ocfs2_set_journal_params(osb);
715
716                 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
717                         ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
718                                                         SB_POSIXACL : 0);
719         }
720 out:
721         return ret;
722 }
723
724 static int ocfs2_sb_probe(struct super_block *sb,
725                           struct buffer_head **bh,
726                           int *sector_size,
727                           struct ocfs2_blockcheck_stats *stats)
728 {
729         int status, tmpstat;
730         struct ocfs1_vol_disk_hdr *hdr;
731         struct ocfs2_dinode *di;
732         int blksize;
733
734         *bh = NULL;
735
736         /* may be > 512 */
737         *sector_size = bdev_logical_block_size(sb->s_bdev);
738         if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
739                 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
740                      *sector_size, OCFS2_MAX_BLOCKSIZE);
741                 status = -EINVAL;
742                 goto bail;
743         }
744
745         /* Can this really happen? */
746         if (*sector_size < OCFS2_MIN_BLOCKSIZE)
747                 *sector_size = OCFS2_MIN_BLOCKSIZE;
748
749         /* check block zero for old format */
750         status = ocfs2_get_sector(sb, bh, 0, *sector_size);
751         if (status < 0) {
752                 mlog_errno(status);
753                 goto bail;
754         }
755         hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
756         if (hdr->major_version == OCFS1_MAJOR_VERSION) {
757                 mlog(ML_ERROR, "incompatible version: %u.%u\n",
758                      hdr->major_version, hdr->minor_version);
759                 status = -EINVAL;
760         }
761         if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
762                    strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
763                 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
764                      hdr->signature);
765                 status = -EINVAL;
766         }
767         brelse(*bh);
768         *bh = NULL;
769         if (status < 0) {
770                 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
771                      "upgraded before mounting with ocfs v2\n");
772                 goto bail;
773         }
774
775         /*
776          * Now check at magic offset for 512, 1024, 2048, 4096
777          * blocksizes.  4096 is the maximum blocksize because it is
778          * the minimum clustersize.
779          */
780         status = -EINVAL;
781         for (blksize = *sector_size;
782              blksize <= OCFS2_MAX_BLOCKSIZE;
783              blksize <<= 1) {
784                 tmpstat = ocfs2_get_sector(sb, bh,
785                                            OCFS2_SUPER_BLOCK_BLKNO,
786                                            blksize);
787                 if (tmpstat < 0) {
788                         status = tmpstat;
789                         mlog_errno(status);
790                         break;
791                 }
792                 di = (struct ocfs2_dinode *) (*bh)->b_data;
793                 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
794                 spin_lock_init(&stats->b_lock);
795                 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
796                 if (tmpstat < 0) {
797                         brelse(*bh);
798                         *bh = NULL;
799                 }
800                 if (tmpstat != -EAGAIN) {
801                         status = tmpstat;
802                         break;
803                 }
804         }
805
806 bail:
807         return status;
808 }
809
810 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
811 {
812         u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
813
814         if (osb->s_mount_opt & hb_enabled) {
815                 if (ocfs2_mount_local(osb)) {
816                         mlog(ML_ERROR, "Cannot heartbeat on a locally "
817                              "mounted device.\n");
818                         return -EINVAL;
819                 }
820                 if (ocfs2_userspace_stack(osb)) {
821                         mlog(ML_ERROR, "Userspace stack expected, but "
822                              "o2cb heartbeat arguments passed to mount\n");
823                         return -EINVAL;
824                 }
825                 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
826                      !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
827                     ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
828                      ocfs2_cluster_o2cb_global_heartbeat(osb))) {
829                         mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
830                         return -EINVAL;
831                 }
832         }
833
834         if (!(osb->s_mount_opt & hb_enabled)) {
835                 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
836                     !ocfs2_userspace_stack(osb)) {
837                         mlog(ML_ERROR, "Heartbeat has to be started to mount "
838                              "a read-write clustered device.\n");
839                         return -EINVAL;
840                 }
841         }
842
843         return 0;
844 }
845
846 /*
847  * If we're using a userspace stack, mount should have passed
848  * a name that matches the disk.  If not, mount should not
849  * have passed a stack.
850  */
851 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
852                                         struct mount_options *mopt)
853 {
854         if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
855                 mlog(ML_ERROR,
856                      "cluster stack passed to mount, but this filesystem "
857                      "does not support it\n");
858                 return -EINVAL;
859         }
860
861         if (ocfs2_userspace_stack(osb) &&
862             strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
863                     OCFS2_STACK_LABEL_LEN)) {
864                 mlog(ML_ERROR,
865                      "cluster stack passed to mount (\"%s\") does not "
866                      "match the filesystem (\"%s\")\n",
867                      mopt->cluster_stack,
868                      osb->osb_cluster_stack);
869                 return -EINVAL;
870         }
871
872         return 0;
873 }
874
875 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
876 {
877         int type;
878         struct super_block *sb = osb->sb;
879         unsigned int feature[OCFS2_MAXQUOTAS] = {
880                                         OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
881                                         OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
882         int status = 0;
883
884         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
885                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
886                         continue;
887                 if (unsuspend)
888                         status = dquot_resume(sb, type);
889                 else {
890                         struct ocfs2_mem_dqinfo *oinfo;
891
892                         /* Cancel periodic syncing before suspending */
893                         oinfo = sb_dqinfo(sb, type)->dqi_priv;
894                         cancel_delayed_work_sync(&oinfo->dqi_sync_work);
895                         status = dquot_suspend(sb, type);
896                 }
897                 if (status < 0)
898                         break;
899         }
900         if (status < 0)
901                 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
902                      "remount (error = %d).\n", status);
903         return status;
904 }
905
906 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
907 {
908         struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
909         struct super_block *sb = osb->sb;
910         unsigned int feature[OCFS2_MAXQUOTAS] = {
911                                         OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
912                                         OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
913         unsigned int ino[OCFS2_MAXQUOTAS] = {
914                                         LOCAL_USER_QUOTA_SYSTEM_INODE,
915                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
916         int status;
917         int type;
918
919         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
920         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
921                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
922                         continue;
923                 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
924                                                         osb->slot_num);
925                 if (!inode[type]) {
926                         status = -ENOENT;
927                         goto out_quota_off;
928                 }
929                 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2,
930                                                 DQUOT_USAGE_ENABLED);
931                 if (status < 0)
932                         goto out_quota_off;
933         }
934
935         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
936                 iput(inode[type]);
937         return 0;
938 out_quota_off:
939         ocfs2_disable_quotas(osb);
940         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
941                 iput(inode[type]);
942         mlog_errno(status);
943         return status;
944 }
945
946 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
947 {
948         int type;
949         struct inode *inode;
950         struct super_block *sb = osb->sb;
951         struct ocfs2_mem_dqinfo *oinfo;
952
953         /* We mostly ignore errors in this function because there's not much
954          * we can do when we see them */
955         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
956                 if (!sb_has_quota_loaded(sb, type))
957                         continue;
958                 oinfo = sb_dqinfo(sb, type)->dqi_priv;
959                 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
960                 inode = igrab(sb->s_dquot.files[type]);
961                 /* Turn off quotas. This will remove all dquot structures from
962                  * memory and so they will be automatically synced to global
963                  * quota files */
964                 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
965                                         DQUOT_LIMITS_ENABLED);
966                 if (!inode)
967                         continue;
968                 iput(inode);
969         }
970 }
971
972 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
973 {
974         struct dentry *root;
975         int status, sector_size;
976         struct mount_options parsed_options;
977         struct inode *inode = NULL;
978         struct ocfs2_super *osb = NULL;
979         struct buffer_head *bh = NULL;
980         char nodestr[12];
981         struct ocfs2_blockcheck_stats stats;
982
983         trace_ocfs2_fill_super(sb, data, silent);
984
985         if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
986                 status = -EINVAL;
987                 goto read_super_error;
988         }
989
990         /* probe for superblock */
991         status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
992         if (status < 0) {
993                 mlog(ML_ERROR, "superblock probe failed!\n");
994                 goto read_super_error;
995         }
996
997         status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
998         osb = OCFS2_SB(sb);
999         if (status < 0) {
1000                 mlog_errno(status);
1001                 goto read_super_error;
1002         }
1003         brelse(bh);
1004         bh = NULL;
1005
1006         if (!ocfs2_check_set_options(sb, &parsed_options)) {
1007                 status = -EINVAL;
1008                 goto read_super_error;
1009         }
1010         osb->s_mount_opt = parsed_options.mount_opt;
1011         osb->s_atime_quantum = parsed_options.atime_quantum;
1012         osb->preferred_slot = parsed_options.slot;
1013         osb->osb_commit_interval = parsed_options.commit_interval;
1014
1015         ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1016         osb->osb_resv_level = parsed_options.resv_level;
1017         osb->osb_dir_resv_level = parsed_options.resv_level;
1018         if (parsed_options.dir_resv_level == -1)
1019                 osb->osb_dir_resv_level = parsed_options.resv_level;
1020         else
1021                 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1022
1023         status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1024         if (status)
1025                 goto read_super_error;
1026
1027         sb->s_magic = OCFS2_SUPER_MAGIC;
1028
1029         sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1030                 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1031
1032         /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1033          * heartbeat=none */
1034         if (bdev_read_only(sb->s_bdev)) {
1035                 if (!sb_rdonly(sb)) {
1036                         status = -EACCES;
1037                         mlog(ML_ERROR, "Readonly device detected but readonly "
1038                              "mount was not specified.\n");
1039                         goto read_super_error;
1040                 }
1041
1042                 /* You should not be able to start a local heartbeat
1043                  * on a readonly device. */
1044                 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1045                         status = -EROFS;
1046                         mlog(ML_ERROR, "Local heartbeat specified on readonly "
1047                              "device.\n");
1048                         goto read_super_error;
1049                 }
1050
1051                 status = ocfs2_check_journals_nolocks(osb);
1052                 if (status < 0) {
1053                         if (status == -EROFS)
1054                                 mlog(ML_ERROR, "Recovery required on readonly "
1055                                      "file system, but write access is "
1056                                      "unavailable.\n");
1057                         else
1058                                 mlog_errno(status);
1059                         goto read_super_error;
1060                 }
1061
1062                 ocfs2_set_ro_flag(osb, 1);
1063
1064                 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1065                        "Cluster services will not be used for this mount. "
1066                        "Recovery will be skipped.\n", osb->dev_str);
1067         }
1068
1069         if (!ocfs2_is_hard_readonly(osb)) {
1070                 if (sb_rdonly(sb))
1071                         ocfs2_set_ro_flag(osb, 0);
1072         }
1073
1074         status = ocfs2_verify_heartbeat(osb);
1075         if (status < 0) {
1076                 mlog_errno(status);
1077                 goto read_super_error;
1078         }
1079
1080         osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1081                                                  ocfs2_debugfs_root);
1082
1083         debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1084                             osb, &ocfs2_osb_debug_fops);
1085
1086         if (ocfs2_meta_ecc(osb))
1087                 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1088                                                         osb->osb_debug_root);
1089
1090         status = ocfs2_mount_volume(sb);
1091         if (status < 0)
1092                 goto read_super_error;
1093
1094         if (osb->root_inode)
1095                 inode = igrab(osb->root_inode);
1096
1097         if (!inode) {
1098                 status = -EIO;
1099                 mlog_errno(status);
1100                 goto read_super_error;
1101         }
1102
1103         root = d_make_root(inode);
1104         if (!root) {
1105                 status = -ENOMEM;
1106                 mlog_errno(status);
1107                 goto read_super_error;
1108         }
1109
1110         sb->s_root = root;
1111
1112         ocfs2_complete_mount_recovery(osb);
1113
1114         osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1115                                                 &ocfs2_kset->kobj);
1116         if (!osb->osb_dev_kset) {
1117                 status = -ENOMEM;
1118                 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1119                 goto read_super_error;
1120         }
1121
1122         /* Create filecheck sysfs related directories/files at
1123          * /sys/fs/ocfs2/<devname>/filecheck */
1124         if (ocfs2_filecheck_create_sysfs(osb)) {
1125                 status = -ENOMEM;
1126                 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1127                         "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1128                 goto read_super_error;
1129         }
1130
1131         if (ocfs2_mount_local(osb))
1132                 snprintf(nodestr, sizeof(nodestr), "local");
1133         else
1134                 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1135
1136         printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1137                "with %s data mode.\n",
1138                osb->dev_str, nodestr, osb->slot_num,
1139                osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1140                "ordered");
1141
1142         atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1143         wake_up(&osb->osb_mount_event);
1144
1145         /* Now we can initialize quotas because we can afford to wait
1146          * for cluster locks recovery now. That also means that truncation
1147          * log recovery can happen but that waits for proper quota setup */
1148         if (!sb_rdonly(sb)) {
1149                 status = ocfs2_enable_quotas(osb);
1150                 if (status < 0) {
1151                         /* We have to err-out specially here because
1152                          * s_root is already set */
1153                         mlog_errno(status);
1154                         atomic_set(&osb->vol_state, VOLUME_DISABLED);
1155                         wake_up(&osb->osb_mount_event);
1156                         return status;
1157                 }
1158         }
1159
1160         ocfs2_complete_quota_recovery(osb);
1161
1162         /* Now we wake up again for processes waiting for quotas */
1163         atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1164         wake_up(&osb->osb_mount_event);
1165
1166         /* Start this when the mount is almost sure of being successful */
1167         ocfs2_orphan_scan_start(osb);
1168
1169         return status;
1170
1171 read_super_error:
1172         brelse(bh);
1173
1174         if (status)
1175                 mlog_errno(status);
1176
1177         if (osb) {
1178                 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1179                 wake_up(&osb->osb_mount_event);
1180                 ocfs2_dismount_volume(sb, 1);
1181         }
1182
1183         return status;
1184 }
1185
1186 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1187                         int flags,
1188                         const char *dev_name,
1189                         void *data)
1190 {
1191         return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1192 }
1193
1194 static struct file_system_type ocfs2_fs_type = {
1195         .owner          = THIS_MODULE,
1196         .name           = "ocfs2",
1197         .mount          = ocfs2_mount,
1198         .kill_sb        = kill_block_super,
1199         .fs_flags       = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1200         .next           = NULL
1201 };
1202 MODULE_ALIAS_FS("ocfs2");
1203
1204 static int ocfs2_check_set_options(struct super_block *sb,
1205                                    struct mount_options *options)
1206 {
1207         if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1208             !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1209                                          OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1210                 mlog(ML_ERROR, "User quotas were requested, but this "
1211                      "filesystem does not have the feature enabled.\n");
1212                 return 0;
1213         }
1214         if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1215             !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1216                                          OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1217                 mlog(ML_ERROR, "Group quotas were requested, but this "
1218                      "filesystem does not have the feature enabled.\n");
1219                 return 0;
1220         }
1221         if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1222             !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1223                 mlog(ML_ERROR, "ACL support requested but extended attributes "
1224                      "feature is not enabled\n");
1225                 return 0;
1226         }
1227         /* No ACL setting specified? Use XATTR feature... */
1228         if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1229                                     OCFS2_MOUNT_NO_POSIX_ACL))) {
1230                 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1231                         options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1232                 else
1233                         options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1234         }
1235         return 1;
1236 }
1237
1238 static int ocfs2_parse_options(struct super_block *sb,
1239                                char *options,
1240                                struct mount_options *mopt,
1241                                int is_remount)
1242 {
1243         int status, user_stack = 0;
1244         char *p;
1245         u32 tmp;
1246         int token, option;
1247         substring_t args[MAX_OPT_ARGS];
1248
1249         trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1250
1251         mopt->commit_interval = 0;
1252         mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1253         mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1254         mopt->slot = OCFS2_INVALID_SLOT;
1255         mopt->localalloc_opt = -1;
1256         mopt->cluster_stack[0] = '\0';
1257         mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1258         mopt->dir_resv_level = -1;
1259
1260         if (!options) {
1261                 status = 1;
1262                 goto bail;
1263         }
1264
1265         while ((p = strsep(&options, ",")) != NULL) {
1266                 if (!*p)
1267                         continue;
1268
1269                 token = match_token(p, tokens, args);
1270                 switch (token) {
1271                 case Opt_hb_local:
1272                         mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1273                         break;
1274                 case Opt_hb_none:
1275                         mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1276                         break;
1277                 case Opt_hb_global:
1278                         mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1279                         break;
1280                 case Opt_barrier:
1281                         if (match_int(&args[0], &option)) {
1282                                 status = 0;
1283                                 goto bail;
1284                         }
1285                         if (option)
1286                                 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1287                         else
1288                                 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1289                         break;
1290                 case Opt_intr:
1291                         mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1292                         break;
1293                 case Opt_nointr:
1294                         mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1295                         break;
1296                 case Opt_err_panic:
1297                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1298                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1299                         mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1300                         break;
1301                 case Opt_err_ro:
1302                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1303                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1304                         mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1305                         break;
1306                 case Opt_err_cont:
1307                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1308                         mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1309                         mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1310                         break;
1311                 case Opt_data_ordered:
1312                         mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1313                         break;
1314                 case Opt_data_writeback:
1315                         mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1316                         break;
1317                 case Opt_user_xattr:
1318                         mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1319                         break;
1320                 case Opt_nouser_xattr:
1321                         mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1322                         break;
1323                 case Opt_atime_quantum:
1324                         if (match_int(&args[0], &option)) {
1325                                 status = 0;
1326                                 goto bail;
1327                         }
1328                         if (option >= 0)
1329                                 mopt->atime_quantum = option;
1330                         break;
1331                 case Opt_slot:
1332                         if (match_int(&args[0], &option)) {
1333                                 status = 0;
1334                                 goto bail;
1335                         }
1336                         if (option)
1337                                 mopt->slot = (s16)option;
1338                         break;
1339                 case Opt_commit:
1340                         if (match_int(&args[0], &option)) {
1341                                 status = 0;
1342                                 goto bail;
1343                         }
1344                         if (option < 0)
1345                                 return 0;
1346                         if (option == 0)
1347                                 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1348                         mopt->commit_interval = HZ * option;
1349                         break;
1350                 case Opt_localalloc:
1351                         if (match_int(&args[0], &option)) {
1352                                 status = 0;
1353                                 goto bail;
1354                         }
1355                         if (option >= 0)
1356                                 mopt->localalloc_opt = option;
1357                         break;
1358                 case Opt_localflocks:
1359                         /*
1360                          * Changing this during remount could race
1361                          * flock() requests, or "unbalance" existing
1362                          * ones (e.g., a lock is taken in one mode but
1363                          * dropped in the other). If users care enough
1364                          * to flip locking modes during remount, we
1365                          * could add a "local" flag to individual
1366                          * flock structures for proper tracking of
1367                          * state.
1368                          */
1369                         if (!is_remount)
1370                                 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1371                         break;
1372                 case Opt_stack:
1373                         /* Check both that the option we were passed
1374                          * is of the right length and that it is a proper
1375                          * string of the right length.
1376                          */
1377                         if (((args[0].to - args[0].from) !=
1378                              OCFS2_STACK_LABEL_LEN) ||
1379                             (strnlen(args[0].from,
1380                                      OCFS2_STACK_LABEL_LEN) !=
1381                              OCFS2_STACK_LABEL_LEN)) {
1382                                 mlog(ML_ERROR,
1383                                      "Invalid cluster_stack option\n");
1384                                 status = 0;
1385                                 goto bail;
1386                         }
1387                         memcpy(mopt->cluster_stack, args[0].from,
1388                                OCFS2_STACK_LABEL_LEN);
1389                         mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1390                         /*
1391                          * Open code the memcmp here as we don't have
1392                          * an osb to pass to
1393                          * ocfs2_userspace_stack().
1394                          */
1395                         if (memcmp(mopt->cluster_stack,
1396                                    OCFS2_CLASSIC_CLUSTER_STACK,
1397                                    OCFS2_STACK_LABEL_LEN))
1398                                 user_stack = 1;
1399                         break;
1400                 case Opt_inode64:
1401                         mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1402                         break;
1403                 case Opt_usrquota:
1404                         mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1405                         break;
1406                 case Opt_grpquota:
1407                         mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1408                         break;
1409                 case Opt_coherency_buffered:
1410                         mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1411                         break;
1412                 case Opt_coherency_full:
1413                         mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1414                         break;
1415                 case Opt_acl:
1416                         mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1417                         mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1418                         break;
1419                 case Opt_noacl:
1420                         mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1421                         mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1422                         break;
1423                 case Opt_resv_level:
1424                         if (is_remount)
1425                                 break;
1426                         if (match_int(&args[0], &option)) {
1427                                 status = 0;
1428                                 goto bail;
1429                         }
1430                         if (option >= OCFS2_MIN_RESV_LEVEL &&
1431                             option < OCFS2_MAX_RESV_LEVEL)
1432                                 mopt->resv_level = option;
1433                         break;
1434                 case Opt_dir_resv_level:
1435                         if (is_remount)
1436                                 break;
1437                         if (match_int(&args[0], &option)) {
1438                                 status = 0;
1439                                 goto bail;
1440                         }
1441                         if (option >= OCFS2_MIN_RESV_LEVEL &&
1442                             option < OCFS2_MAX_RESV_LEVEL)
1443                                 mopt->dir_resv_level = option;
1444                         break;
1445                 case Opt_journal_async_commit:
1446                         mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1447                         break;
1448                 default:
1449                         mlog(ML_ERROR,
1450                              "Unrecognized mount option \"%s\" "
1451                              "or missing value\n", p);
1452                         status = 0;
1453                         goto bail;
1454                 }
1455         }
1456
1457         if (user_stack == 0) {
1458                 /* Ensure only one heartbeat mode */
1459                 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1460                                          OCFS2_MOUNT_HB_GLOBAL |
1461                                          OCFS2_MOUNT_HB_NONE);
1462                 if (hweight32(tmp) != 1) {
1463                         mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1464                         status = 0;
1465                         goto bail;
1466                 }
1467         }
1468
1469         status = 1;
1470
1471 bail:
1472         return status;
1473 }
1474
1475 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1476 {
1477         struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1478         unsigned long opts = osb->s_mount_opt;
1479         unsigned int local_alloc_megs;
1480
1481         if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1482                 seq_printf(s, ",_netdev");
1483                 if (opts & OCFS2_MOUNT_HB_LOCAL)
1484                         seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1485                 else
1486                         seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1487         } else
1488                 seq_printf(s, ",%s", OCFS2_HB_NONE);
1489
1490         if (opts & OCFS2_MOUNT_NOINTR)
1491                 seq_printf(s, ",nointr");
1492
1493         if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1494                 seq_printf(s, ",data=writeback");
1495         else
1496                 seq_printf(s, ",data=ordered");
1497
1498         if (opts & OCFS2_MOUNT_BARRIER)
1499                 seq_printf(s, ",barrier=1");
1500
1501         if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1502                 seq_printf(s, ",errors=panic");
1503         else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1504                 seq_printf(s, ",errors=continue");
1505         else
1506                 seq_printf(s, ",errors=remount-ro");
1507
1508         if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1509                 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1510
1511         seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1512
1513         if (osb->osb_commit_interval)
1514                 seq_printf(s, ",commit=%u",
1515                            (unsigned) (osb->osb_commit_interval / HZ));
1516
1517         local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1518         if (local_alloc_megs != ocfs2_la_default_mb(osb))
1519                 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1520
1521         if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1522                 seq_printf(s, ",localflocks,");
1523
1524         if (osb->osb_cluster_stack[0])
1525                 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1526                                   OCFS2_STACK_LABEL_LEN);
1527         if (opts & OCFS2_MOUNT_USRQUOTA)
1528                 seq_printf(s, ",usrquota");
1529         if (opts & OCFS2_MOUNT_GRPQUOTA)
1530                 seq_printf(s, ",grpquota");
1531
1532         if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1533                 seq_printf(s, ",coherency=buffered");
1534         else
1535                 seq_printf(s, ",coherency=full");
1536
1537         if (opts & OCFS2_MOUNT_NOUSERXATTR)
1538                 seq_printf(s, ",nouser_xattr");
1539         else
1540                 seq_printf(s, ",user_xattr");
1541
1542         if (opts & OCFS2_MOUNT_INODE64)
1543                 seq_printf(s, ",inode64");
1544
1545         if (opts & OCFS2_MOUNT_POSIX_ACL)
1546                 seq_printf(s, ",acl");
1547         else
1548                 seq_printf(s, ",noacl");
1549
1550         if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1551                 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1552
1553         if (osb->osb_dir_resv_level != osb->osb_resv_level)
1554                 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1555
1556         if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1557                 seq_printf(s, ",journal_async_commit");
1558
1559         return 0;
1560 }
1561
1562 static int __init ocfs2_init(void)
1563 {
1564         int status;
1565
1566         status = init_ocfs2_uptodate_cache();
1567         if (status < 0)
1568                 goto out1;
1569
1570         status = ocfs2_initialize_mem_caches();
1571         if (status < 0)
1572                 goto out2;
1573
1574         ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1575
1576         ocfs2_set_locking_protocol();
1577
1578         status = register_quota_format(&ocfs2_quota_format);
1579         if (status < 0)
1580                 goto out3;
1581         status = register_filesystem(&ocfs2_fs_type);
1582         if (!status)
1583                 return 0;
1584
1585         unregister_quota_format(&ocfs2_quota_format);
1586 out3:
1587         debugfs_remove(ocfs2_debugfs_root);
1588         ocfs2_free_mem_caches();
1589 out2:
1590         exit_ocfs2_uptodate_cache();
1591 out1:
1592         mlog_errno(status);
1593         return status;
1594 }
1595
1596 static void __exit ocfs2_exit(void)
1597 {
1598         unregister_quota_format(&ocfs2_quota_format);
1599
1600         debugfs_remove(ocfs2_debugfs_root);
1601
1602         ocfs2_free_mem_caches();
1603
1604         unregister_filesystem(&ocfs2_fs_type);
1605
1606         exit_ocfs2_uptodate_cache();
1607 }
1608
1609 static void ocfs2_put_super(struct super_block *sb)
1610 {
1611         trace_ocfs2_put_super(sb);
1612
1613         ocfs2_sync_blockdev(sb);
1614         ocfs2_dismount_volume(sb, 0);
1615 }
1616
1617 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1618 {
1619         struct ocfs2_super *osb;
1620         u32 numbits, freebits;
1621         int status;
1622         struct ocfs2_dinode *bm_lock;
1623         struct buffer_head *bh = NULL;
1624         struct inode *inode = NULL;
1625
1626         trace_ocfs2_statfs(dentry->d_sb, buf);
1627
1628         osb = OCFS2_SB(dentry->d_sb);
1629
1630         inode = ocfs2_get_system_file_inode(osb,
1631                                             GLOBAL_BITMAP_SYSTEM_INODE,
1632                                             OCFS2_INVALID_SLOT);
1633         if (!inode) {
1634                 mlog(ML_ERROR, "failed to get bitmap inode\n");
1635                 status = -EIO;
1636                 goto bail;
1637         }
1638
1639         status = ocfs2_inode_lock(inode, &bh, 0);
1640         if (status < 0) {
1641                 mlog_errno(status);
1642                 goto bail;
1643         }
1644
1645         bm_lock = (struct ocfs2_dinode *) bh->b_data;
1646
1647         numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1648         freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1649
1650         buf->f_type = OCFS2_SUPER_MAGIC;
1651         buf->f_bsize = dentry->d_sb->s_blocksize;
1652         buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1653         buf->f_blocks = ((sector_t) numbits) *
1654                         (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1655         buf->f_bfree = ((sector_t) freebits) *
1656                        (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1657         buf->f_bavail = buf->f_bfree;
1658         buf->f_files = numbits;
1659         buf->f_ffree = freebits;
1660         buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1661                                 & 0xFFFFFFFFUL;
1662         buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1663                                 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1664
1665         brelse(bh);
1666
1667         ocfs2_inode_unlock(inode, 0);
1668         status = 0;
1669 bail:
1670         iput(inode);
1671
1672         if (status)
1673                 mlog_errno(status);
1674
1675         return status;
1676 }
1677
1678 static void ocfs2_inode_init_once(void *data)
1679 {
1680         struct ocfs2_inode_info *oi = data;
1681
1682         oi->ip_flags = 0;
1683         oi->ip_open_count = 0;
1684         spin_lock_init(&oi->ip_lock);
1685         ocfs2_extent_map_init(&oi->vfs_inode);
1686         INIT_LIST_HEAD(&oi->ip_io_markers);
1687         INIT_LIST_HEAD(&oi->ip_unwritten_list);
1688         oi->ip_dir_start_lookup = 0;
1689         init_rwsem(&oi->ip_alloc_sem);
1690         init_rwsem(&oi->ip_xattr_sem);
1691         mutex_init(&oi->ip_io_mutex);
1692
1693         oi->ip_blkno = 0ULL;
1694         oi->ip_clusters = 0;
1695
1696         ocfs2_resv_init_once(&oi->ip_la_data_resv);
1697
1698         ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1699         ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1700         ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1701
1702         ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1703                                   &ocfs2_inode_caching_ops);
1704
1705         inode_init_once(&oi->vfs_inode);
1706 }
1707
1708 static int ocfs2_initialize_mem_caches(void)
1709 {
1710         ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1711                                        sizeof(struct ocfs2_inode_info),
1712                                        0,
1713                                        (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1714                                                 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1715                                        ocfs2_inode_init_once);
1716         ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1717                                         sizeof(struct ocfs2_dquot),
1718                                         0,
1719                                         (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1720                                                 SLAB_MEM_SPREAD),
1721                                         NULL);
1722         ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1723                                         sizeof(struct ocfs2_quota_chunk),
1724                                         0,
1725                                         (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1726                                         NULL);
1727         if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1728             !ocfs2_qf_chunk_cachep) {
1729                 kmem_cache_destroy(ocfs2_inode_cachep);
1730                 kmem_cache_destroy(ocfs2_dquot_cachep);
1731                 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1732                 return -ENOMEM;
1733         }
1734
1735         return 0;
1736 }
1737
1738 static void ocfs2_free_mem_caches(void)
1739 {
1740         /*
1741          * Make sure all delayed rcu free inodes are flushed before we
1742          * destroy cache.
1743          */
1744         rcu_barrier();
1745         kmem_cache_destroy(ocfs2_inode_cachep);
1746         ocfs2_inode_cachep = NULL;
1747
1748         kmem_cache_destroy(ocfs2_dquot_cachep);
1749         ocfs2_dquot_cachep = NULL;
1750
1751         kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1752         ocfs2_qf_chunk_cachep = NULL;
1753 }
1754
1755 static int ocfs2_get_sector(struct super_block *sb,
1756                             struct buffer_head **bh,
1757                             int block,
1758                             int sect_size)
1759 {
1760         if (!sb_set_blocksize(sb, sect_size)) {
1761                 mlog(ML_ERROR, "unable to set blocksize\n");
1762                 return -EIO;
1763         }
1764
1765         *bh = sb_getblk(sb, block);
1766         if (!*bh) {
1767                 mlog_errno(-ENOMEM);
1768                 return -ENOMEM;
1769         }
1770         lock_buffer(*bh);
1771         if (!buffer_dirty(*bh))
1772                 clear_buffer_uptodate(*bh);
1773         unlock_buffer(*bh);
1774         ll_rw_block(REQ_OP_READ, 0, 1, bh);
1775         wait_on_buffer(*bh);
1776         if (!buffer_uptodate(*bh)) {
1777                 mlog_errno(-EIO);
1778                 brelse(*bh);
1779                 *bh = NULL;
1780                 return -EIO;
1781         }
1782
1783         return 0;
1784 }
1785
1786 static int ocfs2_mount_volume(struct super_block *sb)
1787 {
1788         int status = 0;
1789         int unlock_super = 0;
1790         struct ocfs2_super *osb = OCFS2_SB(sb);
1791
1792         if (ocfs2_is_hard_readonly(osb))
1793                 goto leave;
1794
1795         mutex_init(&osb->obs_trim_fs_mutex);
1796
1797         status = ocfs2_dlm_init(osb);
1798         if (status < 0) {
1799                 mlog_errno(status);
1800                 if (status == -EBADR && ocfs2_userspace_stack(osb))
1801                         mlog(ML_ERROR, "couldn't mount because cluster name on"
1802                         " disk does not match the running cluster name.\n");
1803                 goto leave;
1804         }
1805
1806         status = ocfs2_super_lock(osb, 1);
1807         if (status < 0) {
1808                 mlog_errno(status);
1809                 goto leave;
1810         }
1811         unlock_super = 1;
1812
1813         /* This will load up the node map and add ourselves to it. */
1814         status = ocfs2_find_slot(osb);
1815         if (status < 0) {
1816                 mlog_errno(status);
1817                 goto leave;
1818         }
1819
1820         /* load all node-local system inodes */
1821         status = ocfs2_init_local_system_inodes(osb);
1822         if (status < 0) {
1823                 mlog_errno(status);
1824                 goto leave;
1825         }
1826
1827         status = ocfs2_check_volume(osb);
1828         if (status < 0) {
1829                 mlog_errno(status);
1830                 goto leave;
1831         }
1832
1833         status = ocfs2_truncate_log_init(osb);
1834         if (status < 0)
1835                 mlog_errno(status);
1836
1837 leave:
1838         if (unlock_super)
1839                 ocfs2_super_unlock(osb, 1);
1840
1841         return status;
1842 }
1843
1844 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1845 {
1846         int tmp, hangup_needed = 0;
1847         struct ocfs2_super *osb = NULL;
1848         char nodestr[12];
1849
1850         trace_ocfs2_dismount_volume(sb);
1851
1852         BUG_ON(!sb);
1853         osb = OCFS2_SB(sb);
1854         BUG_ON(!osb);
1855
1856         /* Remove file check sysfs related directores/files,
1857          * and wait for the pending file check operations */
1858         ocfs2_filecheck_remove_sysfs(osb);
1859
1860         kset_unregister(osb->osb_dev_kset);
1861
1862         /* Orphan scan should be stopped as early as possible */
1863         ocfs2_orphan_scan_stop(osb);
1864
1865         ocfs2_disable_quotas(osb);
1866
1867         /* All dquots should be freed by now */
1868         WARN_ON(!llist_empty(&osb->dquot_drop_list));
1869         /* Wait for worker to be done with the work structure in osb */
1870         cancel_work_sync(&osb->dquot_drop_work);
1871
1872         ocfs2_shutdown_local_alloc(osb);
1873
1874         ocfs2_truncate_log_shutdown(osb);
1875
1876         /* This will disable recovery and flush any recovery work. */
1877         ocfs2_recovery_exit(osb);
1878
1879         ocfs2_journal_shutdown(osb);
1880
1881         ocfs2_sync_blockdev(sb);
1882
1883         ocfs2_purge_refcount_trees(osb);
1884
1885         /* No cluster connection means we've failed during mount, so skip
1886          * all the steps which depended on that to complete. */
1887         if (osb->cconn) {
1888                 tmp = ocfs2_super_lock(osb, 1);
1889                 if (tmp < 0) {
1890                         mlog_errno(tmp);
1891                         return;
1892                 }
1893         }
1894
1895         if (osb->slot_num != OCFS2_INVALID_SLOT)
1896                 ocfs2_put_slot(osb);
1897
1898         if (osb->cconn)
1899                 ocfs2_super_unlock(osb, 1);
1900
1901         ocfs2_release_system_inodes(osb);
1902
1903         /*
1904          * If we're dismounting due to mount error, mount.ocfs2 will clean
1905          * up heartbeat.  If we're a local mount, there is no heartbeat.
1906          * If we failed before we got a uuid_str yet, we can't stop
1907          * heartbeat.  Otherwise, do it.
1908          */
1909         if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1910             !ocfs2_is_hard_readonly(osb))
1911                 hangup_needed = 1;
1912
1913         if (osb->cconn)
1914                 ocfs2_dlm_shutdown(osb, hangup_needed);
1915
1916         ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1917         debugfs_remove_recursive(osb->osb_debug_root);
1918
1919         if (hangup_needed)
1920                 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1921
1922         atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1923
1924         if (ocfs2_mount_local(osb))
1925                 snprintf(nodestr, sizeof(nodestr), "local");
1926         else
1927                 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1928
1929         printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1930                osb->dev_str, nodestr);
1931
1932         ocfs2_delete_osb(osb);
1933         kfree(osb);
1934         sb->s_dev = 0;
1935         sb->s_fs_info = NULL;
1936 }
1937
1938 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1939                                 unsigned uuid_bytes)
1940 {
1941         int i, ret;
1942         char *ptr;
1943
1944         BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1945
1946         osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1947         if (osb->uuid_str == NULL)
1948                 return -ENOMEM;
1949
1950         for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1951                 /* print with null */
1952                 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1953                 if (ret != 2) /* drop super cleans up */
1954                         return -EINVAL;
1955                 /* then only advance past the last char */
1956                 ptr += 2;
1957         }
1958
1959         return 0;
1960 }
1961
1962 /* Make sure entire volume is addressable by our journal.  Requires
1963    osb_clusters_at_boot to be valid and for the journal to have been
1964    initialized by ocfs2_journal_init(). */
1965 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1966 {
1967         int status = 0;
1968         u64 max_block =
1969                 ocfs2_clusters_to_blocks(osb->sb,
1970                                          osb->osb_clusters_at_boot) - 1;
1971
1972         /* 32-bit block number is always OK. */
1973         if (max_block <= (u32)~0ULL)
1974                 goto out;
1975
1976         /* Volume is "huge", so see if our journal is new enough to
1977            support it. */
1978         if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1979                                        OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1980               jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1981                                                JBD2_FEATURE_INCOMPAT_64BIT))) {
1982                 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1983                      "Enable the 'block64' journal option with tunefs.ocfs2");
1984                 status = -EFBIG;
1985                 goto out;
1986         }
1987
1988  out:
1989         return status;
1990 }
1991
1992 static int ocfs2_initialize_super(struct super_block *sb,
1993                                   struct buffer_head *bh,
1994                                   int sector_size,
1995                                   struct ocfs2_blockcheck_stats *stats)
1996 {
1997         int status;
1998         int i, cbits, bbits;
1999         struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2000         struct inode *inode = NULL;
2001         struct ocfs2_journal *journal;
2002         struct ocfs2_super *osb;
2003         u64 total_blocks;
2004
2005         osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2006         if (!osb) {
2007                 status = -ENOMEM;
2008                 mlog_errno(status);
2009                 goto bail;
2010         }
2011
2012         sb->s_fs_info = osb;
2013         sb->s_op = &ocfs2_sops;
2014         sb->s_d_op = &ocfs2_dentry_ops;
2015         sb->s_export_op = &ocfs2_export_ops;
2016         sb->s_qcop = &dquot_quotactl_sysfile_ops;
2017         sb->dq_op = &ocfs2_quota_operations;
2018         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2019         sb->s_xattr = ocfs2_xattr_handlers;
2020         sb->s_time_gran = 1;
2021         sb->s_flags |= SB_NOATIME;
2022         /* this is needed to support O_LARGEFILE */
2023         cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2024         bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2025         sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2026         memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2027                sizeof(di->id2.i_super.s_uuid));
2028
2029         osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2030
2031         for (i = 0; i < 3; i++)
2032                 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2033         osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2034
2035         osb->sb = sb;
2036         osb->s_sectsize_bits = blksize_bits(sector_size);
2037         BUG_ON(!osb->s_sectsize_bits);
2038
2039         spin_lock_init(&osb->dc_task_lock);
2040         init_waitqueue_head(&osb->dc_event);
2041         osb->dc_work_sequence = 0;
2042         osb->dc_wake_sequence = 0;
2043         INIT_LIST_HEAD(&osb->blocked_lock_list);
2044         osb->blocked_lock_count = 0;
2045         spin_lock_init(&osb->osb_lock);
2046         spin_lock_init(&osb->osb_xattr_lock);
2047         ocfs2_init_steal_slots(osb);
2048
2049         mutex_init(&osb->system_file_mutex);
2050
2051         atomic_set(&osb->alloc_stats.moves, 0);
2052         atomic_set(&osb->alloc_stats.local_data, 0);
2053         atomic_set(&osb->alloc_stats.bitmap_data, 0);
2054         atomic_set(&osb->alloc_stats.bg_allocs, 0);
2055         atomic_set(&osb->alloc_stats.bg_extends, 0);
2056
2057         /* Copy the blockcheck stats from the superblock probe */
2058         osb->osb_ecc_stats = *stats;
2059
2060         ocfs2_init_node_maps(osb);
2061
2062         snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2063                  MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2064
2065         osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2066         if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2067                 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2068                      osb->max_slots);
2069                 status = -EINVAL;
2070                 goto bail;
2071         }
2072
2073         ocfs2_orphan_scan_init(osb);
2074
2075         status = ocfs2_recovery_init(osb);
2076         if (status) {
2077                 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2078                 mlog_errno(status);
2079                 goto bail;
2080         }
2081
2082         init_waitqueue_head(&osb->checkpoint_event);
2083
2084         osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2085
2086         osb->slot_num = OCFS2_INVALID_SLOT;
2087
2088         osb->s_xattr_inline_size = le16_to_cpu(
2089                                         di->id2.i_super.s_xattr_inline_size);
2090
2091         osb->local_alloc_state = OCFS2_LA_UNUSED;
2092         osb->local_alloc_bh = NULL;
2093         INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2094
2095         init_waitqueue_head(&osb->osb_mount_event);
2096
2097         status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2098         if (status) {
2099                 mlog_errno(status);
2100                 goto bail;
2101         }
2102
2103         osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2104         if (!osb->vol_label) {
2105                 mlog(ML_ERROR, "unable to alloc vol label\n");
2106                 status = -ENOMEM;
2107                 goto bail;
2108         }
2109
2110         osb->slot_recovery_generations =
2111                 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2112                         GFP_KERNEL);
2113         if (!osb->slot_recovery_generations) {
2114                 status = -ENOMEM;
2115                 mlog_errno(status);
2116                 goto bail;
2117         }
2118
2119         init_waitqueue_head(&osb->osb_wipe_event);
2120         osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2121                                         sizeof(*osb->osb_orphan_wipes),
2122                                         GFP_KERNEL);
2123         if (!osb->osb_orphan_wipes) {
2124                 status = -ENOMEM;
2125                 mlog_errno(status);
2126                 goto bail;
2127         }
2128
2129         osb->osb_rf_lock_tree = RB_ROOT;
2130
2131         osb->s_feature_compat =
2132                 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2133         osb->s_feature_ro_compat =
2134                 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2135         osb->s_feature_incompat =
2136                 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2137
2138         if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2139                 mlog(ML_ERROR, "couldn't mount because of unsupported "
2140                      "optional features (%x).\n", i);
2141                 status = -EINVAL;
2142                 goto bail;
2143         }
2144         if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2145                 mlog(ML_ERROR, "couldn't mount RDWR because of "
2146                      "unsupported optional features (%x).\n", i);
2147                 status = -EINVAL;
2148                 goto bail;
2149         }
2150
2151         if (ocfs2_clusterinfo_valid(osb)) {
2152                 osb->osb_stackflags =
2153                         OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2154                 strlcpy(osb->osb_cluster_stack,
2155                        OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2156                        OCFS2_STACK_LABEL_LEN + 1);
2157                 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2158                         mlog(ML_ERROR,
2159                              "couldn't mount because of an invalid "
2160                              "cluster stack label (%s) \n",
2161                              osb->osb_cluster_stack);
2162                         status = -EINVAL;
2163                         goto bail;
2164                 }
2165                 strlcpy(osb->osb_cluster_name,
2166                         OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2167                         OCFS2_CLUSTER_NAME_LEN + 1);
2168         } else {
2169                 /* The empty string is identical with classic tools that
2170                  * don't know about s_cluster_info. */
2171                 osb->osb_cluster_stack[0] = '\0';
2172         }
2173
2174         get_random_bytes(&osb->s_next_generation, sizeof(u32));
2175
2176         /* FIXME
2177          * This should be done in ocfs2_journal_init(), but unknown
2178          * ordering issues will cause the filesystem to crash.
2179          * If anyone wants to figure out what part of the code
2180          * refers to osb->journal before ocfs2_journal_init() is run,
2181          * be my guest.
2182          */
2183         /* initialize our journal structure */
2184
2185         journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2186         if (!journal) {
2187                 mlog(ML_ERROR, "unable to alloc journal\n");
2188                 status = -ENOMEM;
2189                 goto bail;
2190         }
2191         osb->journal = journal;
2192         journal->j_osb = osb;
2193
2194         atomic_set(&journal->j_num_trans, 0);
2195         init_rwsem(&journal->j_trans_barrier);
2196         init_waitqueue_head(&journal->j_checkpointed);
2197         spin_lock_init(&journal->j_lock);
2198         journal->j_trans_id = (unsigned long) 1;
2199         INIT_LIST_HEAD(&journal->j_la_cleanups);
2200         INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2201         journal->j_state = OCFS2_JOURNAL_FREE;
2202
2203         INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2204         init_llist_head(&osb->dquot_drop_list);
2205
2206         /* get some pseudo constants for clustersize bits */
2207         osb->s_clustersize_bits =
2208                 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2209         osb->s_clustersize = 1 << osb->s_clustersize_bits;
2210
2211         if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2212             osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2213                 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2214                      osb->s_clustersize);
2215                 status = -EINVAL;
2216                 goto bail;
2217         }
2218
2219         total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2220                                                 le32_to_cpu(di->i_clusters));
2221
2222         status = generic_check_addressable(osb->sb->s_blocksize_bits,
2223                                            total_blocks);
2224         if (status) {
2225                 mlog(ML_ERROR, "Volume too large "
2226                      "to mount safely on this system");
2227                 status = -EFBIG;
2228                 goto bail;
2229         }
2230
2231         if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2232                                  sizeof(di->id2.i_super.s_uuid))) {
2233                 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2234                 status = -ENOMEM;
2235                 goto bail;
2236         }
2237
2238         strlcpy(osb->vol_label, di->id2.i_super.s_label,
2239                 OCFS2_MAX_VOL_LABEL_LEN);
2240         osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2241         osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2242         osb->first_cluster_group_blkno =
2243                 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2244         osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2245         osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2246         trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2247                                      (unsigned long long)osb->root_blkno,
2248                                      (unsigned long long)osb->system_dir_blkno,
2249                                      osb->s_clustersize_bits);
2250
2251         osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2252         if (!osb->osb_dlm_debug) {
2253                 status = -ENOMEM;
2254                 mlog_errno(status);
2255                 goto bail;
2256         }
2257
2258         atomic_set(&osb->vol_state, VOLUME_INIT);
2259
2260         /* load root, system_dir, and all global system inodes */
2261         status = ocfs2_init_global_system_inodes(osb);
2262         if (status < 0) {
2263                 mlog_errno(status);
2264                 goto bail;
2265         }
2266
2267         /*
2268          * global bitmap
2269          */
2270         inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2271                                             OCFS2_INVALID_SLOT);
2272         if (!inode) {
2273                 status = -EINVAL;
2274                 mlog_errno(status);
2275                 goto bail;
2276         }
2277
2278         osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2279         osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2280         iput(inode);
2281
2282         osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2283                                  osb->s_feature_incompat) * 8;
2284
2285         status = ocfs2_init_slot_info(osb);
2286         if (status < 0) {
2287                 mlog_errno(status);
2288                 goto bail;
2289         }
2290         cleancache_init_shared_fs(sb);
2291
2292         osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2293         if (!osb->ocfs2_wq) {
2294                 status = -ENOMEM;
2295                 mlog_errno(status);
2296         }
2297
2298 bail:
2299         return status;
2300 }
2301
2302 /*
2303  * will return: -EAGAIN if it is ok to keep searching for superblocks
2304  *              -EINVAL if there is a bad superblock
2305  *              0 on success
2306  */
2307 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2308                                struct buffer_head *bh,
2309                                u32 blksz,
2310                                struct ocfs2_blockcheck_stats *stats)
2311 {
2312         int status = -EAGAIN;
2313
2314         if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2315                    strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2316                 /* We have to do a raw check of the feature here */
2317                 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2318                     OCFS2_FEATURE_INCOMPAT_META_ECC) {
2319                         status = ocfs2_block_check_validate(bh->b_data,
2320                                                             bh->b_size,
2321                                                             &di->i_check,
2322                                                             stats);
2323                         if (status)
2324                                 goto out;
2325                 }
2326                 status = -EINVAL;
2327                 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2328                         mlog(ML_ERROR, "found superblock with incorrect block "
2329                              "size: found %u, should be %u\n",
2330                              1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2331                                blksz);
2332                 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2333                            OCFS2_MAJOR_REV_LEVEL ||
2334                            le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2335                            OCFS2_MINOR_REV_LEVEL) {
2336                         mlog(ML_ERROR, "found superblock with bad version: "
2337                              "found %u.%u, should be %u.%u\n",
2338                              le16_to_cpu(di->id2.i_super.s_major_rev_level),
2339                              le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2340                              OCFS2_MAJOR_REV_LEVEL,
2341                              OCFS2_MINOR_REV_LEVEL);
2342                 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2343                         mlog(ML_ERROR, "bad block number on superblock: "
2344                              "found %llu, should be %llu\n",
2345                              (unsigned long long)le64_to_cpu(di->i_blkno),
2346                              (unsigned long long)bh->b_blocknr);
2347                 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2348                             le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2349                         mlog(ML_ERROR, "bad cluster size found: %u\n",
2350                              1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2351                 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2352                         mlog(ML_ERROR, "bad root_blkno: 0\n");
2353                 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2354                         mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2355                 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2356                         mlog(ML_ERROR,
2357                              "Superblock slots found greater than file system "
2358                              "maximum: found %u, max %u\n",
2359                              le16_to_cpu(di->id2.i_super.s_max_slots),
2360                              OCFS2_MAX_SLOTS);
2361                 } else {
2362                         /* found it! */
2363                         status = 0;
2364                 }
2365         }
2366
2367 out:
2368         if (status && status != -EAGAIN)
2369                 mlog_errno(status);
2370         return status;
2371 }
2372
2373 static int ocfs2_check_volume(struct ocfs2_super *osb)
2374 {
2375         int status;
2376         int dirty;
2377         int local;
2378         struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2379                                                   * recover
2380                                                   * ourselves. */
2381
2382         /* Init our journal object. */
2383         status = ocfs2_journal_init(osb->journal, &dirty);
2384         if (status < 0) {
2385                 mlog(ML_ERROR, "Could not initialize journal!\n");
2386                 goto finally;
2387         }
2388
2389         /* Now that journal has been initialized, check to make sure
2390            entire volume is addressable. */
2391         status = ocfs2_journal_addressable(osb);
2392         if (status)
2393                 goto finally;
2394
2395         /* If the journal was unmounted cleanly then we don't want to
2396          * recover anything. Otherwise, journal_load will do that
2397          * dirty work for us :) */
2398         if (!dirty) {
2399                 status = ocfs2_journal_wipe(osb->journal, 0);
2400                 if (status < 0) {
2401                         mlog_errno(status);
2402                         goto finally;
2403                 }
2404         } else {
2405                 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2406                        "unmounted cleanly, recovering it.\n", osb->dev_str);
2407         }
2408
2409         local = ocfs2_mount_local(osb);
2410
2411         /* will play back anything left in the journal. */
2412         status = ocfs2_journal_load(osb->journal, local, dirty);
2413         if (status < 0) {
2414                 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2415                 goto finally;
2416         }
2417
2418         if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2419                 jbd2_journal_set_features(osb->journal->j_journal,
2420                                 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2421                                 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2422         else
2423                 jbd2_journal_clear_features(osb->journal->j_journal,
2424                                 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2425                                 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2426
2427         if (dirty) {
2428                 /* recover my local alloc if we didn't unmount cleanly. */
2429                 status = ocfs2_begin_local_alloc_recovery(osb,
2430                                                           osb->slot_num,
2431                                                           &local_alloc);
2432                 if (status < 0) {
2433                         mlog_errno(status);
2434                         goto finally;
2435                 }
2436                 /* we complete the recovery process after we've marked
2437                  * ourselves as mounted. */
2438         }
2439
2440         status = ocfs2_load_local_alloc(osb);
2441         if (status < 0) {
2442                 mlog_errno(status);
2443                 goto finally;
2444         }
2445
2446         if (dirty) {
2447                 /* Recovery will be completed after we've mounted the
2448                  * rest of the volume. */
2449                 osb->local_alloc_copy = local_alloc;
2450                 local_alloc = NULL;
2451         }
2452
2453         /* go through each journal, trylock it and if you get the
2454          * lock, and it's marked as dirty, set the bit in the recover
2455          * map and launch a recovery thread for it. */
2456         status = ocfs2_mark_dead_nodes(osb);
2457         if (status < 0) {
2458                 mlog_errno(status);
2459                 goto finally;
2460         }
2461
2462         status = ocfs2_compute_replay_slots(osb);
2463         if (status < 0)
2464                 mlog_errno(status);
2465
2466 finally:
2467         kfree(local_alloc);
2468
2469         if (status)
2470                 mlog_errno(status);
2471         return status;
2472 }
2473
2474 /*
2475  * The routine gets called from dismount or close whenever a dismount on
2476  * volume is requested and the osb open count becomes 1.
2477  * It will remove the osb from the global list and also free up all the
2478  * initialized resources and fileobject.
2479  */
2480 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2481 {
2482         /* This function assumes that the caller has the main osb resource */
2483
2484         /* ocfs2_initializer_super have already created this workqueue */
2485         if (osb->ocfs2_wq)
2486                 destroy_workqueue(osb->ocfs2_wq);
2487
2488         ocfs2_free_slot_info(osb);
2489
2490         kfree(osb->osb_orphan_wipes);
2491         kfree(osb->slot_recovery_generations);
2492         /* FIXME
2493          * This belongs in journal shutdown, but because we have to
2494          * allocate osb->journal at the start of ocfs2_initialize_osb(),
2495          * we free it here.
2496          */
2497         kfree(osb->journal);
2498         kfree(osb->local_alloc_copy);
2499         kfree(osb->uuid_str);
2500         kfree(osb->vol_label);
2501         ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2502         memset(osb, 0, sizeof(struct ocfs2_super));
2503 }
2504
2505 /* Depending on the mount option passed, perform one of the following:
2506  * Put OCFS2 into a readonly state (default)
2507  * Return EIO so that only the process errs
2508  * Fix the error as if fsck.ocfs2 -y
2509  * panic
2510  */
2511 static int ocfs2_handle_error(struct super_block *sb)
2512 {
2513         struct ocfs2_super *osb = OCFS2_SB(sb);
2514         int rv = 0;
2515
2516         ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2517         pr_crit("On-disk corruption discovered. "
2518                 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2519
2520         if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2521                 panic("OCFS2: (device %s): panic forced after error\n",
2522                       sb->s_id);
2523         } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2524                 pr_crit("OCFS2: Returning error to the calling process.\n");
2525                 rv = -EIO;
2526         } else { /* default option */
2527                 rv = -EROFS;
2528                 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2529                         return rv;
2530
2531                 pr_crit("OCFS2: File system is now read-only.\n");
2532                 sb->s_flags |= SB_RDONLY;
2533                 ocfs2_set_ro_flag(osb, 0);
2534         }
2535
2536         return rv;
2537 }
2538
2539 int __ocfs2_error(struct super_block *sb, const char *function,
2540                   const char *fmt, ...)
2541 {
2542         struct va_format vaf;
2543         va_list args;
2544
2545         va_start(args, fmt);
2546         vaf.fmt = fmt;
2547         vaf.va = &args;
2548
2549         /* Not using mlog here because we want to show the actual
2550          * function the error came from. */
2551         printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2552                sb->s_id, function, &vaf);
2553
2554         va_end(args);
2555
2556         return ocfs2_handle_error(sb);
2557 }
2558
2559 /* Handle critical errors. This is intentionally more drastic than
2560  * ocfs2_handle_error, so we only use for things like journal errors,
2561  * etc. */
2562 void __ocfs2_abort(struct super_block *sb, const char *function,
2563                    const char *fmt, ...)
2564 {
2565         struct va_format vaf;
2566         va_list args;
2567
2568         va_start(args, fmt);
2569
2570         vaf.fmt = fmt;
2571         vaf.va = &args;
2572
2573         printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2574                sb->s_id, function, &vaf);
2575
2576         va_end(args);
2577
2578         /* We don't have the cluster support yet to go straight to
2579          * hard readonly in here. Until then, we want to keep
2580          * ocfs2_abort() so that we can at least mark critical
2581          * errors.
2582          *
2583          * TODO: This should abort the journal and alert other nodes
2584          * that our slot needs recovery. */
2585
2586         /* Force a panic(). This stinks, but it's better than letting
2587          * things continue without having a proper hard readonly
2588          * here. */
2589         if (!ocfs2_mount_local(OCFS2_SB(sb)))
2590                 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2591         ocfs2_handle_error(sb);
2592 }
2593
2594 /*
2595  * Void signal blockers, because in-kernel sigprocmask() only fails
2596  * when SIG_* is wrong.
2597  */
2598 void ocfs2_block_signals(sigset_t *oldset)
2599 {
2600         int rc;
2601         sigset_t blocked;
2602
2603         sigfillset(&blocked);
2604         rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2605         BUG_ON(rc);
2606 }
2607
2608 void ocfs2_unblock_signals(sigset_t *oldset)
2609 {
2610         int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2611         BUG_ON(rc);
2612 }
2613
2614 module_init(ocfs2_init);
2615 module_exit(ocfs2_exit);