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1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26#include <linux/module.h>
27#include <linux/fs.h>
28#include <linux/types.h>
29#include <linux/slab.h>
30#include <linux/highmem.h>
31#include <linux/init.h>
32#include <linux/random.h>
33#include <linux/statfs.h>
34#include <linux/moduleparam.h>
35#include <linux/blkdev.h>
36#include <linux/socket.h>
37#include <linux/inet.h>
38#include <linux/parser.h>
39#include <linux/crc32.h>
40#include <linux/debugfs.h>
41#include <linux/mount.h>
42#include <linux/seq_file.h>
43#include <linux/quotaops.h>
44#include <linux/cleancache.h>
45
46#define CREATE_TRACE_POINTS
47#include "ocfs2_trace.h"
48
49#include <cluster/masklog.h>
50
51#include "ocfs2.h"
52
53/* this should be the only file to include a version 1 header */
54#include "ocfs1_fs_compat.h"
55
56#include "alloc.h"
57#include "aops.h"
58#include "blockcheck.h"
59#include "dlmglue.h"
60#include "export.h"
61#include "extent_map.h"
62#include "heartbeat.h"
63#include "inode.h"
64#include "journal.h"
65#include "localalloc.h"
66#include "namei.h"
67#include "slot_map.h"
68#include "super.h"
69#include "sysfile.h"
70#include "uptodate.h"
71#include "xattr.h"
72#include "quota.h"
73#include "refcounttree.h"
74#include "suballoc.h"
75
76#include "buffer_head_io.h"
77#include "filecheck.h"
78
79static struct kmem_cache *ocfs2_inode_cachep;
80struct kmem_cache *ocfs2_dquot_cachep;
81struct kmem_cache *ocfs2_qf_chunk_cachep;
82
83static struct dentry *ocfs2_debugfs_root;
84
85MODULE_AUTHOR("Oracle");
86MODULE_LICENSE("GPL");
87MODULE_DESCRIPTION("OCFS2 cluster file system");
88
89struct mount_options
90{
91 unsigned long commit_interval;
92 unsigned long mount_opt;
93 unsigned int atime_quantum;
94 signed short slot;
95 int localalloc_opt;
96 unsigned int resv_level;
97 int dir_resv_level;
98 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
99};
100
101static int ocfs2_parse_options(struct super_block *sb, char *options,
102 struct mount_options *mopt,
103 int is_remount);
104static int ocfs2_check_set_options(struct super_block *sb,
105 struct mount_options *options);
106static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
107static void ocfs2_put_super(struct super_block *sb);
108static int ocfs2_mount_volume(struct super_block *sb);
109static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
110static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
111static int ocfs2_initialize_mem_caches(void);
112static void ocfs2_free_mem_caches(void);
113static void ocfs2_delete_osb(struct ocfs2_super *osb);
114
115static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
116
117static int ocfs2_sync_fs(struct super_block *sb, int wait);
118
119static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
120static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
121static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
122static int ocfs2_check_volume(struct ocfs2_super *osb);
123static int ocfs2_verify_volume(struct ocfs2_dinode *di,
124 struct buffer_head *bh,
125 u32 sectsize,
126 struct ocfs2_blockcheck_stats *stats);
127static int ocfs2_initialize_super(struct super_block *sb,
128 struct buffer_head *bh,
129 int sector_size,
130 struct ocfs2_blockcheck_stats *stats);
131static int ocfs2_get_sector(struct super_block *sb,
132 struct buffer_head **bh,
133 int block,
134 int sect_size);
135static struct inode *ocfs2_alloc_inode(struct super_block *sb);
136static void ocfs2_destroy_inode(struct inode *inode);
137static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
138static int ocfs2_enable_quotas(struct ocfs2_super *osb);
139static void ocfs2_disable_quotas(struct ocfs2_super *osb);
140
141static struct dquot **ocfs2_get_dquots(struct inode *inode)
142{
143 return OCFS2_I(inode)->i_dquot;
144}
145
146static const struct super_operations ocfs2_sops = {
147 .statfs = ocfs2_statfs,
148 .alloc_inode = ocfs2_alloc_inode,
149 .destroy_inode = ocfs2_destroy_inode,
150 .drop_inode = ocfs2_drop_inode,
151 .evict_inode = ocfs2_evict_inode,
152 .sync_fs = ocfs2_sync_fs,
153 .put_super = ocfs2_put_super,
154 .remount_fs = ocfs2_remount,
155 .show_options = ocfs2_show_options,
156 .quota_read = ocfs2_quota_read,
157 .quota_write = ocfs2_quota_write,
158 .get_dquots = ocfs2_get_dquots,
159};
160
161enum {
162 Opt_barrier,
163 Opt_err_panic,
164 Opt_err_ro,
165 Opt_intr,
166 Opt_nointr,
167 Opt_hb_none,
168 Opt_hb_local,
169 Opt_hb_global,
170 Opt_data_ordered,
171 Opt_data_writeback,
172 Opt_atime_quantum,
173 Opt_slot,
174 Opt_commit,
175 Opt_localalloc,
176 Opt_localflocks,
177 Opt_stack,
178 Opt_user_xattr,
179 Opt_nouser_xattr,
180 Opt_inode64,
181 Opt_acl,
182 Opt_noacl,
183 Opt_usrquota,
184 Opt_grpquota,
185 Opt_coherency_buffered,
186 Opt_coherency_full,
187 Opt_resv_level,
188 Opt_dir_resv_level,
189 Opt_journal_async_commit,
190 Opt_err_cont,
191 Opt_err,
192};
193
194static const match_table_t tokens = {
195 {Opt_barrier, "barrier=%u"},
196 {Opt_err_panic, "errors=panic"},
197 {Opt_err_ro, "errors=remount-ro"},
198 {Opt_intr, "intr"},
199 {Opt_nointr, "nointr"},
200 {Opt_hb_none, OCFS2_HB_NONE},
201 {Opt_hb_local, OCFS2_HB_LOCAL},
202 {Opt_hb_global, OCFS2_HB_GLOBAL},
203 {Opt_data_ordered, "data=ordered"},
204 {Opt_data_writeback, "data=writeback"},
205 {Opt_atime_quantum, "atime_quantum=%u"},
206 {Opt_slot, "preferred_slot=%u"},
207 {Opt_commit, "commit=%u"},
208 {Opt_localalloc, "localalloc=%d"},
209 {Opt_localflocks, "localflocks"},
210 {Opt_stack, "cluster_stack=%s"},
211 {Opt_user_xattr, "user_xattr"},
212 {Opt_nouser_xattr, "nouser_xattr"},
213 {Opt_inode64, "inode64"},
214 {Opt_acl, "acl"},
215 {Opt_noacl, "noacl"},
216 {Opt_usrquota, "usrquota"},
217 {Opt_grpquota, "grpquota"},
218 {Opt_coherency_buffered, "coherency=buffered"},
219 {Opt_coherency_full, "coherency=full"},
220 {Opt_resv_level, "resv_level=%u"},
221 {Opt_dir_resv_level, "dir_resv_level=%u"},
222 {Opt_journal_async_commit, "journal_async_commit"},
223 {Opt_err_cont, "errors=continue"},
224 {Opt_err, NULL}
225};
226
227#ifdef CONFIG_DEBUG_FS
228static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
229{
230 struct ocfs2_cluster_connection *cconn = osb->cconn;
231 struct ocfs2_recovery_map *rm = osb->recovery_map;
232 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
233 int i, out = 0;
234 unsigned long flags;
235
236 out += snprintf(buf + out, len - out,
237 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
238 "Device", osb->dev_str, osb->uuid_str,
239 osb->fs_generation, osb->vol_label);
240
241 out += snprintf(buf + out, len - out,
242 "%10s => State: %d Flags: 0x%lX\n", "Volume",
243 atomic_read(&osb->vol_state), osb->osb_flags);
244
245 out += snprintf(buf + out, len - out,
246 "%10s => Block: %lu Cluster: %d\n", "Sizes",
247 osb->sb->s_blocksize, osb->s_clustersize);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Compat: 0x%X Incompat: 0x%X "
251 "ROcompat: 0x%X\n",
252 "Features", osb->s_feature_compat,
253 osb->s_feature_incompat, osb->s_feature_ro_compat);
254
255 out += snprintf(buf + out, len - out,
256 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
257 osb->s_mount_opt, osb->s_atime_quantum);
258
259 if (cconn) {
260 out += snprintf(buf + out, len - out,
261 "%10s => Stack: %s Name: %*s "
262 "Version: %d.%d\n", "Cluster",
263 (*osb->osb_cluster_stack == '\0' ?
264 "o2cb" : osb->osb_cluster_stack),
265 cconn->cc_namelen, cconn->cc_name,
266 cconn->cc_version.pv_major,
267 cconn->cc_version.pv_minor);
268 }
269
270 spin_lock_irqsave(&osb->dc_task_lock, flags);
271 out += snprintf(buf + out, len - out,
272 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
273 "WorkSeq: %lu\n", "DownCnvt",
274 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
275 osb->blocked_lock_count, osb->dc_wake_sequence,
276 osb->dc_work_sequence);
277 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
278
279 spin_lock(&osb->osb_lock);
280 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
281 "Recovery",
282 (osb->recovery_thread_task ?
283 task_pid_nr(osb->recovery_thread_task) : -1));
284 if (rm->rm_used == 0)
285 out += snprintf(buf + out, len - out, " None\n");
286 else {
287 for (i = 0; i < rm->rm_used; i++)
288 out += snprintf(buf + out, len - out, " %d",
289 rm->rm_entries[i]);
290 out += snprintf(buf + out, len - out, "\n");
291 }
292 spin_unlock(&osb->osb_lock);
293
294 out += snprintf(buf + out, len - out,
295 "%10s => Pid: %d Interval: %lu\n", "Commit",
296 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
297 osb->osb_commit_interval);
298
299 out += snprintf(buf + out, len - out,
300 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
301 "Journal", osb->journal->j_state,
302 osb->journal->j_trans_id,
303 atomic_read(&osb->journal->j_num_trans));
304
305 out += snprintf(buf + out, len - out,
306 "%10s => GlobalAllocs: %d LocalAllocs: %d "
307 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
308 "Stats",
309 atomic_read(&osb->alloc_stats.bitmap_data),
310 atomic_read(&osb->alloc_stats.local_data),
311 atomic_read(&osb->alloc_stats.bg_allocs),
312 atomic_read(&osb->alloc_stats.moves),
313 atomic_read(&osb->alloc_stats.bg_extends));
314
315 out += snprintf(buf + out, len - out,
316 "%10s => State: %u Descriptor: %llu Size: %u bits "
317 "Default: %u bits\n",
318 "LocalAlloc", osb->local_alloc_state,
319 (unsigned long long)osb->la_last_gd,
320 osb->local_alloc_bits, osb->local_alloc_default_bits);
321
322 spin_lock(&osb->osb_lock);
323 out += snprintf(buf + out, len - out,
324 "%10s => InodeSlot: %d StolenInodes: %d, "
325 "MetaSlot: %d StolenMeta: %d\n", "Steal",
326 osb->s_inode_steal_slot,
327 atomic_read(&osb->s_num_inodes_stolen),
328 osb->s_meta_steal_slot,
329 atomic_read(&osb->s_num_meta_stolen));
330 spin_unlock(&osb->osb_lock);
331
332 out += snprintf(buf + out, len - out, "OrphanScan => ");
333 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
334 os->os_count, os->os_seqno);
335 out += snprintf(buf + out, len - out, " Last Scan: ");
336 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
337 out += snprintf(buf + out, len - out, "Disabled\n");
338 else
339 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
340 (unsigned long)(ktime_get_seconds() - os->os_scantime));
341
342 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
343 "Slots", "Num", "RecoGen");
344 for (i = 0; i < osb->max_slots; ++i) {
345 out += snprintf(buf + out, len - out,
346 "%10s %c %3d %10d\n",
347 " ",
348 (i == osb->slot_num ? '*' : ' '),
349 i, osb->slot_recovery_generations[i]);
350 }
351
352 return out;
353}
354
355static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
356{
357 struct ocfs2_super *osb = inode->i_private;
358 char *buf = NULL;
359
360 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
361 if (!buf)
362 goto bail;
363
364 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
365
366 file->private_data = buf;
367
368 return 0;
369bail:
370 return -ENOMEM;
371}
372
373static int ocfs2_debug_release(struct inode *inode, struct file *file)
374{
375 kfree(file->private_data);
376 return 0;
377}
378
379static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
380 size_t nbytes, loff_t *ppos)
381{
382 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
383 i_size_read(file->f_mapping->host));
384}
385#else
386static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
387{
388 return 0;
389}
390static int ocfs2_debug_release(struct inode *inode, struct file *file)
391{
392 return 0;
393}
394static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
395 size_t nbytes, loff_t *ppos)
396{
397 return 0;
398}
399#endif /* CONFIG_DEBUG_FS */
400
401static const struct file_operations ocfs2_osb_debug_fops = {
402 .open = ocfs2_osb_debug_open,
403 .release = ocfs2_debug_release,
404 .read = ocfs2_debug_read,
405 .llseek = generic_file_llseek,
406};
407
408static int ocfs2_sync_fs(struct super_block *sb, int wait)
409{
410 int status;
411 tid_t target;
412 struct ocfs2_super *osb = OCFS2_SB(sb);
413
414 if (ocfs2_is_hard_readonly(osb))
415 return -EROFS;
416
417 if (wait) {
418 status = ocfs2_flush_truncate_log(osb);
419 if (status < 0)
420 mlog_errno(status);
421 } else {
422 ocfs2_schedule_truncate_log_flush(osb, 0);
423 }
424
425 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
426 &target)) {
427 if (wait)
428 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
429 target);
430 }
431 return 0;
432}
433
434static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
435{
436 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
437 && (ino == USER_QUOTA_SYSTEM_INODE
438 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
439 return 0;
440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
441 && (ino == GROUP_QUOTA_SYSTEM_INODE
442 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
443 return 0;
444 return 1;
445}
446
447static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
448{
449 struct inode *new = NULL;
450 int status = 0;
451 int i;
452
453 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
454 if (IS_ERR(new)) {
455 status = PTR_ERR(new);
456 mlog_errno(status);
457 goto bail;
458 }
459 osb->root_inode = new;
460
461 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
462 if (IS_ERR(new)) {
463 status = PTR_ERR(new);
464 mlog_errno(status);
465 goto bail;
466 }
467 osb->sys_root_inode = new;
468
469 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
470 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
471 if (!ocfs2_need_system_inode(osb, i))
472 continue;
473 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
474 if (!new) {
475 ocfs2_release_system_inodes(osb);
476 status = -EINVAL;
477 mlog_errno(status);
478 /* FIXME: Should ERROR_RO_FS */
479 mlog(ML_ERROR, "Unable to load system inode %d, "
480 "possibly corrupt fs?", i);
481 goto bail;
482 }
483 // the array now has one ref, so drop this one
484 iput(new);
485 }
486
487bail:
488 if (status)
489 mlog_errno(status);
490 return status;
491}
492
493static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
494{
495 struct inode *new = NULL;
496 int status = 0;
497 int i;
498
499 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
500 i < NUM_SYSTEM_INODES;
501 i++) {
502 if (!ocfs2_need_system_inode(osb, i))
503 continue;
504 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
505 if (!new) {
506 ocfs2_release_system_inodes(osb);
507 status = -EINVAL;
508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
509 status, i, osb->slot_num);
510 goto bail;
511 }
512 /* the array now has one ref, so drop this one */
513 iput(new);
514 }
515
516bail:
517 if (status)
518 mlog_errno(status);
519 return status;
520}
521
522static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
523{
524 int i;
525 struct inode *inode;
526
527 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
528 inode = osb->global_system_inodes[i];
529 if (inode) {
530 iput(inode);
531 osb->global_system_inodes[i] = NULL;
532 }
533 }
534
535 inode = osb->sys_root_inode;
536 if (inode) {
537 iput(inode);
538 osb->sys_root_inode = NULL;
539 }
540
541 inode = osb->root_inode;
542 if (inode) {
543 iput(inode);
544 osb->root_inode = NULL;
545 }
546
547 if (!osb->local_system_inodes)
548 return;
549
550 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
551 if (osb->local_system_inodes[i]) {
552 iput(osb->local_system_inodes[i]);
553 osb->local_system_inodes[i] = NULL;
554 }
555 }
556
557 kfree(osb->local_system_inodes);
558 osb->local_system_inodes = NULL;
559}
560
561/* We're allocating fs objects, use GFP_NOFS */
562static struct inode *ocfs2_alloc_inode(struct super_block *sb)
563{
564 struct ocfs2_inode_info *oi;
565
566 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
567 if (!oi)
568 return NULL;
569
570 oi->i_sync_tid = 0;
571 oi->i_datasync_tid = 0;
572 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
573
574 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
575 return &oi->vfs_inode;
576}
577
578static void ocfs2_i_callback(struct rcu_head *head)
579{
580 struct inode *inode = container_of(head, struct inode, i_rcu);
581 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
582}
583
584static void ocfs2_destroy_inode(struct inode *inode)
585{
586 call_rcu(&inode->i_rcu, ocfs2_i_callback);
587}
588
589static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
590 unsigned int cbits)
591{
592 unsigned int bytes = 1 << cbits;
593 unsigned int trim = bytes;
594 unsigned int bitshift = 32;
595
596 /*
597 * i_size and all block offsets in ocfs2 are always 64 bits
598 * wide. i_clusters is 32 bits, in cluster-sized units. So on
599 * 64 bit platforms, cluster size will be the limiting factor.
600 */
601
602#if BITS_PER_LONG == 32
603# if defined(CONFIG_LBDAF)
604 BUILD_BUG_ON(sizeof(sector_t) != 8);
605 /*
606 * We might be limited by page cache size.
607 */
608 if (bytes > PAGE_SIZE) {
609 bytes = PAGE_SIZE;
610 trim = 1;
611 /*
612 * Shift by 31 here so that we don't get larger than
613 * MAX_LFS_FILESIZE
614 */
615 bitshift = 31;
616 }
617# else
618 /*
619 * We are limited by the size of sector_t. Use block size, as
620 * that's what we expose to the VFS.
621 */
622 bytes = 1 << bbits;
623 trim = 1;
624 bitshift = 31;
625# endif
626#endif
627
628 /*
629 * Trim by a whole cluster when we can actually approach the
630 * on-disk limits. Otherwise we can overflow i_clusters when
631 * an extent start is at the max offset.
632 */
633 return (((unsigned long long)bytes) << bitshift) - trim;
634}
635
636static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
637{
638 int incompat_features;
639 int ret = 0;
640 struct mount_options parsed_options;
641 struct ocfs2_super *osb = OCFS2_SB(sb);
642 u32 tmp;
643
644 sync_filesystem(sb);
645
646 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
647 !ocfs2_check_set_options(sb, &parsed_options)) {
648 ret = -EINVAL;
649 goto out;
650 }
651
652 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
653 OCFS2_MOUNT_HB_NONE;
654 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
655 ret = -EINVAL;
656 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
657 goto out;
658 }
659
660 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
661 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
662 ret = -EINVAL;
663 mlog(ML_ERROR, "Cannot change data mode on remount\n");
664 goto out;
665 }
666
667 /* Probably don't want this on remount; it might
668 * mess with other nodes */
669 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
670 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
671 ret = -EINVAL;
672 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
673 goto out;
674 }
675
676 /* We're going to/from readonly mode. */
677 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
678 /* Disable quota accounting before remounting RO */
679 if (*flags & MS_RDONLY) {
680 ret = ocfs2_susp_quotas(osb, 0);
681 if (ret < 0)
682 goto out;
683 }
684 /* Lock here so the check of HARD_RO and the potential
685 * setting of SOFT_RO is atomic. */
686 spin_lock(&osb->osb_lock);
687 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
688 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692
693 if (*flags & MS_RDONLY) {
694 sb->s_flags |= MS_RDONLY;
695 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
696 } else {
697 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
698 mlog(ML_ERROR, "Cannot remount RDWR "
699 "filesystem due to previous errors.\n");
700 ret = -EROFS;
701 goto unlock_osb;
702 }
703 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
704 if (incompat_features) {
705 mlog(ML_ERROR, "Cannot remount RDWR because "
706 "of unsupported optional features "
707 "(%x).\n", incompat_features);
708 ret = -EINVAL;
709 goto unlock_osb;
710 }
711 sb->s_flags &= ~MS_RDONLY;
712 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
713 }
714 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
715unlock_osb:
716 spin_unlock(&osb->osb_lock);
717 /* Enable quota accounting after remounting RW */
718 if (!ret && !(*flags & MS_RDONLY)) {
719 if (sb_any_quota_suspended(sb))
720 ret = ocfs2_susp_quotas(osb, 1);
721 else
722 ret = ocfs2_enable_quotas(osb);
723 if (ret < 0) {
724 /* Return back changes... */
725 spin_lock(&osb->osb_lock);
726 sb->s_flags |= MS_RDONLY;
727 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
728 spin_unlock(&osb->osb_lock);
729 goto out;
730 }
731 }
732 }
733
734 if (!ret) {
735 /* Only save off the new mount options in case of a successful
736 * remount. */
737 osb->s_mount_opt = parsed_options.mount_opt;
738 osb->s_atime_quantum = parsed_options.atime_quantum;
739 osb->preferred_slot = parsed_options.slot;
740 if (parsed_options.commit_interval)
741 osb->osb_commit_interval = parsed_options.commit_interval;
742
743 if (!ocfs2_is_hard_readonly(osb))
744 ocfs2_set_journal_params(osb);
745
746 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
748 MS_POSIXACL : 0);
749 }
750out:
751 return ret;
752}
753
754static int ocfs2_sb_probe(struct super_block *sb,
755 struct buffer_head **bh,
756 int *sector_size,
757 struct ocfs2_blockcheck_stats *stats)
758{
759 int status, tmpstat;
760 struct ocfs1_vol_disk_hdr *hdr;
761 struct ocfs2_dinode *di;
762 int blksize;
763
764 *bh = NULL;
765
766 /* may be > 512 */
767 *sector_size = bdev_logical_block_size(sb->s_bdev);
768 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
769 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
770 *sector_size, OCFS2_MAX_BLOCKSIZE);
771 status = -EINVAL;
772 goto bail;
773 }
774
775 /* Can this really happen? */
776 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
777 *sector_size = OCFS2_MIN_BLOCKSIZE;
778
779 /* check block zero for old format */
780 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
781 if (status < 0) {
782 mlog_errno(status);
783 goto bail;
784 }
785 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
786 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
787 mlog(ML_ERROR, "incompatible version: %u.%u\n",
788 hdr->major_version, hdr->minor_version);
789 status = -EINVAL;
790 }
791 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
792 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
793 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
794 hdr->signature);
795 status = -EINVAL;
796 }
797 brelse(*bh);
798 *bh = NULL;
799 if (status < 0) {
800 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
801 "upgraded before mounting with ocfs v2\n");
802 goto bail;
803 }
804
805 /*
806 * Now check at magic offset for 512, 1024, 2048, 4096
807 * blocksizes. 4096 is the maximum blocksize because it is
808 * the minimum clustersize.
809 */
810 status = -EINVAL;
811 for (blksize = *sector_size;
812 blksize <= OCFS2_MAX_BLOCKSIZE;
813 blksize <<= 1) {
814 tmpstat = ocfs2_get_sector(sb, bh,
815 OCFS2_SUPER_BLOCK_BLKNO,
816 blksize);
817 if (tmpstat < 0) {
818 status = tmpstat;
819 mlog_errno(status);
820 break;
821 }
822 di = (struct ocfs2_dinode *) (*bh)->b_data;
823 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
824 spin_lock_init(&stats->b_lock);
825 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
826 if (tmpstat < 0) {
827 brelse(*bh);
828 *bh = NULL;
829 }
830 if (tmpstat != -EAGAIN) {
831 status = tmpstat;
832 break;
833 }
834 }
835
836bail:
837 return status;
838}
839
840static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
841{
842 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
843
844 if (osb->s_mount_opt & hb_enabled) {
845 if (ocfs2_mount_local(osb)) {
846 mlog(ML_ERROR, "Cannot heartbeat on a locally "
847 "mounted device.\n");
848 return -EINVAL;
849 }
850 if (ocfs2_userspace_stack(osb)) {
851 mlog(ML_ERROR, "Userspace stack expected, but "
852 "o2cb heartbeat arguments passed to mount\n");
853 return -EINVAL;
854 }
855 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
856 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
857 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
858 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
859 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
860 return -EINVAL;
861 }
862 }
863
864 if (!(osb->s_mount_opt & hb_enabled)) {
865 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
866 !ocfs2_userspace_stack(osb)) {
867 mlog(ML_ERROR, "Heartbeat has to be started to mount "
868 "a read-write clustered device.\n");
869 return -EINVAL;
870 }
871 }
872
873 return 0;
874}
875
876/*
877 * If we're using a userspace stack, mount should have passed
878 * a name that matches the disk. If not, mount should not
879 * have passed a stack.
880 */
881static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
882 struct mount_options *mopt)
883{
884 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
885 mlog(ML_ERROR,
886 "cluster stack passed to mount, but this filesystem "
887 "does not support it\n");
888 return -EINVAL;
889 }
890
891 if (ocfs2_userspace_stack(osb) &&
892 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
893 OCFS2_STACK_LABEL_LEN)) {
894 mlog(ML_ERROR,
895 "cluster stack passed to mount (\"%s\") does not "
896 "match the filesystem (\"%s\")\n",
897 mopt->cluster_stack,
898 osb->osb_cluster_stack);
899 return -EINVAL;
900 }
901
902 return 0;
903}
904
905static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
906{
907 int type;
908 struct super_block *sb = osb->sb;
909 unsigned int feature[OCFS2_MAXQUOTAS] = {
910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
912 int status = 0;
913
914 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
915 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
916 continue;
917 if (unsuspend)
918 status = dquot_resume(sb, type);
919 else {
920 struct ocfs2_mem_dqinfo *oinfo;
921
922 /* Cancel periodic syncing before suspending */
923 oinfo = sb_dqinfo(sb, type)->dqi_priv;
924 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
925 status = dquot_suspend(sb, type);
926 }
927 if (status < 0)
928 break;
929 }
930 if (status < 0)
931 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
932 "remount (error = %d).\n", status);
933 return status;
934}
935
936static int ocfs2_enable_quotas(struct ocfs2_super *osb)
937{
938 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
939 struct super_block *sb = osb->sb;
940 unsigned int feature[OCFS2_MAXQUOTAS] = {
941 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
942 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
943 unsigned int ino[OCFS2_MAXQUOTAS] = {
944 LOCAL_USER_QUOTA_SYSTEM_INODE,
945 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
946 int status;
947 int type;
948
949 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
952 continue;
953 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
954 osb->slot_num);
955 if (!inode[type]) {
956 status = -ENOENT;
957 goto out_quota_off;
958 }
959 status = dquot_enable(inode[type], type, QFMT_OCFS2,
960 DQUOT_USAGE_ENABLED);
961 if (status < 0)
962 goto out_quota_off;
963 }
964
965 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
966 iput(inode[type]);
967 return 0;
968out_quota_off:
969 ocfs2_disable_quotas(osb);
970 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
971 iput(inode[type]);
972 mlog_errno(status);
973 return status;
974}
975
976static void ocfs2_disable_quotas(struct ocfs2_super *osb)
977{
978 int type;
979 struct inode *inode;
980 struct super_block *sb = osb->sb;
981 struct ocfs2_mem_dqinfo *oinfo;
982
983 /* We mostly ignore errors in this function because there's not much
984 * we can do when we see them */
985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
986 if (!sb_has_quota_loaded(sb, type))
987 continue;
988 oinfo = sb_dqinfo(sb, type)->dqi_priv;
989 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
990 inode = igrab(sb->s_dquot.files[type]);
991 /* Turn off quotas. This will remove all dquot structures from
992 * memory and so they will be automatically synced to global
993 * quota files */
994 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
995 DQUOT_LIMITS_ENABLED);
996 if (!inode)
997 continue;
998 iput(inode);
999 }
1000}
1001
1002static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1003{
1004 struct dentry *root;
1005 int status, sector_size;
1006 struct mount_options parsed_options;
1007 struct inode *inode = NULL;
1008 struct ocfs2_super *osb = NULL;
1009 struct buffer_head *bh = NULL;
1010 char nodestr[12];
1011 struct ocfs2_blockcheck_stats stats;
1012
1013 trace_ocfs2_fill_super(sb, data, silent);
1014
1015 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1016 status = -EINVAL;
1017 goto read_super_error;
1018 }
1019
1020 /* probe for superblock */
1021 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
1022 if (status < 0) {
1023 mlog(ML_ERROR, "superblock probe failed!\n");
1024 goto read_super_error;
1025 }
1026
1027 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1028 osb = OCFS2_SB(sb);
1029 if (status < 0) {
1030 mlog_errno(status);
1031 goto read_super_error;
1032 }
1033 brelse(bh);
1034 bh = NULL;
1035
1036 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1037 status = -EINVAL;
1038 goto read_super_error;
1039 }
1040 osb->s_mount_opt = parsed_options.mount_opt;
1041 osb->s_atime_quantum = parsed_options.atime_quantum;
1042 osb->preferred_slot = parsed_options.slot;
1043 osb->osb_commit_interval = parsed_options.commit_interval;
1044
1045 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1046 osb->osb_resv_level = parsed_options.resv_level;
1047 osb->osb_dir_resv_level = parsed_options.resv_level;
1048 if (parsed_options.dir_resv_level == -1)
1049 osb->osb_dir_resv_level = parsed_options.resv_level;
1050 else
1051 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1052
1053 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1054 if (status)
1055 goto read_super_error;
1056
1057 sb->s_magic = OCFS2_SUPER_MAGIC;
1058
1059 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1060 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1061
1062 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1063 * heartbeat=none */
1064 if (bdev_read_only(sb->s_bdev)) {
1065 if (!(sb->s_flags & MS_RDONLY)) {
1066 status = -EACCES;
1067 mlog(ML_ERROR, "Readonly device detected but readonly "
1068 "mount was not specified.\n");
1069 goto read_super_error;
1070 }
1071
1072 /* You should not be able to start a local heartbeat
1073 * on a readonly device. */
1074 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1075 status = -EROFS;
1076 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1077 "device.\n");
1078 goto read_super_error;
1079 }
1080
1081 status = ocfs2_check_journals_nolocks(osb);
1082 if (status < 0) {
1083 if (status == -EROFS)
1084 mlog(ML_ERROR, "Recovery required on readonly "
1085 "file system, but write access is "
1086 "unavailable.\n");
1087 else
1088 mlog_errno(status);
1089 goto read_super_error;
1090 }
1091
1092 ocfs2_set_ro_flag(osb, 1);
1093
1094 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1095 "Cluster services will not be used for this mount. "
1096 "Recovery will be skipped.\n", osb->dev_str);
1097 }
1098
1099 if (!ocfs2_is_hard_readonly(osb)) {
1100 if (sb->s_flags & MS_RDONLY)
1101 ocfs2_set_ro_flag(osb, 0);
1102 }
1103
1104 status = ocfs2_verify_heartbeat(osb);
1105 if (status < 0) {
1106 mlog_errno(status);
1107 goto read_super_error;
1108 }
1109
1110 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1111 ocfs2_debugfs_root);
1112 if (!osb->osb_debug_root) {
1113 status = -EINVAL;
1114 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1115 goto read_super_error;
1116 }
1117
1118 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1119 osb->osb_debug_root,
1120 osb,
1121 &ocfs2_osb_debug_fops);
1122 if (!osb->osb_ctxt) {
1123 status = -EINVAL;
1124 mlog_errno(status);
1125 goto read_super_error;
1126 }
1127
1128 if (ocfs2_meta_ecc(osb)) {
1129 status = ocfs2_blockcheck_stats_debugfs_install(
1130 &osb->osb_ecc_stats,
1131 osb->osb_debug_root);
1132 if (status) {
1133 mlog(ML_ERROR,
1134 "Unable to create blockcheck statistics "
1135 "files\n");
1136 goto read_super_error;
1137 }
1138 }
1139
1140 status = ocfs2_mount_volume(sb);
1141 if (status < 0)
1142 goto read_super_error;
1143
1144 if (osb->root_inode)
1145 inode = igrab(osb->root_inode);
1146
1147 if (!inode) {
1148 status = -EIO;
1149 mlog_errno(status);
1150 goto read_super_error;
1151 }
1152
1153 root = d_make_root(inode);
1154 if (!root) {
1155 status = -ENOMEM;
1156 mlog_errno(status);
1157 goto read_super_error;
1158 }
1159
1160 sb->s_root = root;
1161
1162 ocfs2_complete_mount_recovery(osb);
1163
1164 if (ocfs2_mount_local(osb))
1165 snprintf(nodestr, sizeof(nodestr), "local");
1166 else
1167 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1168
1169 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1170 "with %s data mode.\n",
1171 osb->dev_str, nodestr, osb->slot_num,
1172 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1173 "ordered");
1174
1175 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1176 wake_up(&osb->osb_mount_event);
1177
1178 /* Now we can initialize quotas because we can afford to wait
1179 * for cluster locks recovery now. That also means that truncation
1180 * log recovery can happen but that waits for proper quota setup */
1181 if (!(sb->s_flags & MS_RDONLY)) {
1182 status = ocfs2_enable_quotas(osb);
1183 if (status < 0) {
1184 /* We have to err-out specially here because
1185 * s_root is already set */
1186 mlog_errno(status);
1187 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1188 wake_up(&osb->osb_mount_event);
1189 return status;
1190 }
1191 }
1192
1193 ocfs2_complete_quota_recovery(osb);
1194
1195 /* Now we wake up again for processes waiting for quotas */
1196 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1197 wake_up(&osb->osb_mount_event);
1198
1199 /* Start this when the mount is almost sure of being successful */
1200 ocfs2_orphan_scan_start(osb);
1201
1202 /* Create filecheck sysfile /sys/fs/ocfs2/<devname>/filecheck */
1203 ocfs2_filecheck_create_sysfs(sb);
1204
1205 return status;
1206
1207read_super_error:
1208 brelse(bh);
1209
1210 if (osb) {
1211 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1212 wake_up(&osb->osb_mount_event);
1213 ocfs2_dismount_volume(sb, 1);
1214 }
1215
1216 if (status)
1217 mlog_errno(status);
1218 return status;
1219}
1220
1221static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1222 int flags,
1223 const char *dev_name,
1224 void *data)
1225{
1226 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1227}
1228
1229static struct file_system_type ocfs2_fs_type = {
1230 .owner = THIS_MODULE,
1231 .name = "ocfs2",
1232 .mount = ocfs2_mount,
1233 .kill_sb = kill_block_super,
1234 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1235 .next = NULL
1236};
1237MODULE_ALIAS_FS("ocfs2");
1238
1239static int ocfs2_check_set_options(struct super_block *sb,
1240 struct mount_options *options)
1241{
1242 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1243 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1244 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1245 mlog(ML_ERROR, "User quotas were requested, but this "
1246 "filesystem does not have the feature enabled.\n");
1247 return 0;
1248 }
1249 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1250 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1251 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1252 mlog(ML_ERROR, "Group quotas were requested, but this "
1253 "filesystem does not have the feature enabled.\n");
1254 return 0;
1255 }
1256 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1257 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1258 mlog(ML_ERROR, "ACL support requested but extended attributes "
1259 "feature is not enabled\n");
1260 return 0;
1261 }
1262 /* No ACL setting specified? Use XATTR feature... */
1263 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1264 OCFS2_MOUNT_NO_POSIX_ACL))) {
1265 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1266 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1267 else
1268 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1269 }
1270 return 1;
1271}
1272
1273static int ocfs2_parse_options(struct super_block *sb,
1274 char *options,
1275 struct mount_options *mopt,
1276 int is_remount)
1277{
1278 int status, user_stack = 0;
1279 char *p;
1280 u32 tmp;
1281 int token, option;
1282 substring_t args[MAX_OPT_ARGS];
1283
1284 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1285
1286 mopt->commit_interval = 0;
1287 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1288 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1289 mopt->slot = OCFS2_INVALID_SLOT;
1290 mopt->localalloc_opt = -1;
1291 mopt->cluster_stack[0] = '\0';
1292 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1293 mopt->dir_resv_level = -1;
1294
1295 if (!options) {
1296 status = 1;
1297 goto bail;
1298 }
1299
1300 while ((p = strsep(&options, ",")) != NULL) {
1301 if (!*p)
1302 continue;
1303
1304 token = match_token(p, tokens, args);
1305 switch (token) {
1306 case Opt_hb_local:
1307 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1308 break;
1309 case Opt_hb_none:
1310 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1311 break;
1312 case Opt_hb_global:
1313 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1314 break;
1315 case Opt_barrier:
1316 if (match_int(&args[0], &option)) {
1317 status = 0;
1318 goto bail;
1319 }
1320 if (option)
1321 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1322 else
1323 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1324 break;
1325 case Opt_intr:
1326 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1327 break;
1328 case Opt_nointr:
1329 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1330 break;
1331 case Opt_err_panic:
1332 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1333 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1334 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1335 break;
1336 case Opt_err_ro:
1337 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1338 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1339 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1340 break;
1341 case Opt_err_cont:
1342 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1343 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1344 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1345 break;
1346 case Opt_data_ordered:
1347 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1348 break;
1349 case Opt_data_writeback:
1350 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1351 break;
1352 case Opt_user_xattr:
1353 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1354 break;
1355 case Opt_nouser_xattr:
1356 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1357 break;
1358 case Opt_atime_quantum:
1359 if (match_int(&args[0], &option)) {
1360 status = 0;
1361 goto bail;
1362 }
1363 if (option >= 0)
1364 mopt->atime_quantum = option;
1365 break;
1366 case Opt_slot:
1367 if (match_int(&args[0], &option)) {
1368 status = 0;
1369 goto bail;
1370 }
1371 if (option)
1372 mopt->slot = (s16)option;
1373 break;
1374 case Opt_commit:
1375 if (match_int(&args[0], &option)) {
1376 status = 0;
1377 goto bail;
1378 }
1379 if (option < 0)
1380 return 0;
1381 if (option == 0)
1382 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1383 mopt->commit_interval = HZ * option;
1384 break;
1385 case Opt_localalloc:
1386 if (match_int(&args[0], &option)) {
1387 status = 0;
1388 goto bail;
1389 }
1390 if (option >= 0)
1391 mopt->localalloc_opt = option;
1392 break;
1393 case Opt_localflocks:
1394 /*
1395 * Changing this during remount could race
1396 * flock() requests, or "unbalance" existing
1397 * ones (e.g., a lock is taken in one mode but
1398 * dropped in the other). If users care enough
1399 * to flip locking modes during remount, we
1400 * could add a "local" flag to individual
1401 * flock structures for proper tracking of
1402 * state.
1403 */
1404 if (!is_remount)
1405 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1406 break;
1407 case Opt_stack:
1408 /* Check both that the option we were passed
1409 * is of the right length and that it is a proper
1410 * string of the right length.
1411 */
1412 if (((args[0].to - args[0].from) !=
1413 OCFS2_STACK_LABEL_LEN) ||
1414 (strnlen(args[0].from,
1415 OCFS2_STACK_LABEL_LEN) !=
1416 OCFS2_STACK_LABEL_LEN)) {
1417 mlog(ML_ERROR,
1418 "Invalid cluster_stack option\n");
1419 status = 0;
1420 goto bail;
1421 }
1422 memcpy(mopt->cluster_stack, args[0].from,
1423 OCFS2_STACK_LABEL_LEN);
1424 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1425 /*
1426 * Open code the memcmp here as we don't have
1427 * an osb to pass to
1428 * ocfs2_userspace_stack().
1429 */
1430 if (memcmp(mopt->cluster_stack,
1431 OCFS2_CLASSIC_CLUSTER_STACK,
1432 OCFS2_STACK_LABEL_LEN))
1433 user_stack = 1;
1434 break;
1435 case Opt_inode64:
1436 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1437 break;
1438 case Opt_usrquota:
1439 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1440 break;
1441 case Opt_grpquota:
1442 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1443 break;
1444 case Opt_coherency_buffered:
1445 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1446 break;
1447 case Opt_coherency_full:
1448 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1449 break;
1450 case Opt_acl:
1451 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1452 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1453 break;
1454 case Opt_noacl:
1455 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1456 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1457 break;
1458 case Opt_resv_level:
1459 if (is_remount)
1460 break;
1461 if (match_int(&args[0], &option)) {
1462 status = 0;
1463 goto bail;
1464 }
1465 if (option >= OCFS2_MIN_RESV_LEVEL &&
1466 option < OCFS2_MAX_RESV_LEVEL)
1467 mopt->resv_level = option;
1468 break;
1469 case Opt_dir_resv_level:
1470 if (is_remount)
1471 break;
1472 if (match_int(&args[0], &option)) {
1473 status = 0;
1474 goto bail;
1475 }
1476 if (option >= OCFS2_MIN_RESV_LEVEL &&
1477 option < OCFS2_MAX_RESV_LEVEL)
1478 mopt->dir_resv_level = option;
1479 break;
1480 case Opt_journal_async_commit:
1481 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1482 break;
1483 default:
1484 mlog(ML_ERROR,
1485 "Unrecognized mount option \"%s\" "
1486 "or missing value\n", p);
1487 status = 0;
1488 goto bail;
1489 }
1490 }
1491
1492 if (user_stack == 0) {
1493 /* Ensure only one heartbeat mode */
1494 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1495 OCFS2_MOUNT_HB_GLOBAL |
1496 OCFS2_MOUNT_HB_NONE);
1497 if (hweight32(tmp) != 1) {
1498 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1499 status = 0;
1500 goto bail;
1501 }
1502 }
1503
1504 status = 1;
1505
1506bail:
1507 return status;
1508}
1509
1510static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1511{
1512 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1513 unsigned long opts = osb->s_mount_opt;
1514 unsigned int local_alloc_megs;
1515
1516 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1517 seq_printf(s, ",_netdev");
1518 if (opts & OCFS2_MOUNT_HB_LOCAL)
1519 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1520 else
1521 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1522 } else
1523 seq_printf(s, ",%s", OCFS2_HB_NONE);
1524
1525 if (opts & OCFS2_MOUNT_NOINTR)
1526 seq_printf(s, ",nointr");
1527
1528 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1529 seq_printf(s, ",data=writeback");
1530 else
1531 seq_printf(s, ",data=ordered");
1532
1533 if (opts & OCFS2_MOUNT_BARRIER)
1534 seq_printf(s, ",barrier=1");
1535
1536 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1537 seq_printf(s, ",errors=panic");
1538 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1539 seq_printf(s, ",errors=continue");
1540 else
1541 seq_printf(s, ",errors=remount-ro");
1542
1543 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1544 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1545
1546 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1547
1548 if (osb->osb_commit_interval)
1549 seq_printf(s, ",commit=%u",
1550 (unsigned) (osb->osb_commit_interval / HZ));
1551
1552 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1553 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1554 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1555
1556 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1557 seq_printf(s, ",localflocks,");
1558
1559 if (osb->osb_cluster_stack[0])
1560 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1561 OCFS2_STACK_LABEL_LEN);
1562 if (opts & OCFS2_MOUNT_USRQUOTA)
1563 seq_printf(s, ",usrquota");
1564 if (opts & OCFS2_MOUNT_GRPQUOTA)
1565 seq_printf(s, ",grpquota");
1566
1567 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1568 seq_printf(s, ",coherency=buffered");
1569 else
1570 seq_printf(s, ",coherency=full");
1571
1572 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1573 seq_printf(s, ",nouser_xattr");
1574 else
1575 seq_printf(s, ",user_xattr");
1576
1577 if (opts & OCFS2_MOUNT_INODE64)
1578 seq_printf(s, ",inode64");
1579
1580 if (opts & OCFS2_MOUNT_POSIX_ACL)
1581 seq_printf(s, ",acl");
1582 else
1583 seq_printf(s, ",noacl");
1584
1585 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1586 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1587
1588 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1589 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1590
1591 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1592 seq_printf(s, ",journal_async_commit");
1593
1594 return 0;
1595}
1596
1597static int __init ocfs2_init(void)
1598{
1599 int status;
1600
1601 status = init_ocfs2_uptodate_cache();
1602 if (status < 0)
1603 goto out1;
1604
1605 status = ocfs2_initialize_mem_caches();
1606 if (status < 0)
1607 goto out2;
1608
1609 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1610 if (!ocfs2_debugfs_root) {
1611 status = -ENOMEM;
1612 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1613 goto out3;
1614 }
1615
1616 ocfs2_set_locking_protocol();
1617
1618 status = register_quota_format(&ocfs2_quota_format);
1619 if (status < 0)
1620 goto out3;
1621 status = register_filesystem(&ocfs2_fs_type);
1622 if (!status)
1623 return 0;
1624
1625 unregister_quota_format(&ocfs2_quota_format);
1626out3:
1627 debugfs_remove(ocfs2_debugfs_root);
1628 ocfs2_free_mem_caches();
1629out2:
1630 exit_ocfs2_uptodate_cache();
1631out1:
1632 mlog_errno(status);
1633 return status;
1634}
1635
1636static void __exit ocfs2_exit(void)
1637{
1638 unregister_quota_format(&ocfs2_quota_format);
1639
1640 debugfs_remove(ocfs2_debugfs_root);
1641
1642 ocfs2_free_mem_caches();
1643
1644 unregister_filesystem(&ocfs2_fs_type);
1645
1646 exit_ocfs2_uptodate_cache();
1647}
1648
1649static void ocfs2_put_super(struct super_block *sb)
1650{
1651 trace_ocfs2_put_super(sb);
1652
1653 ocfs2_sync_blockdev(sb);
1654 ocfs2_dismount_volume(sb, 0);
1655 ocfs2_filecheck_remove_sysfs(sb);
1656}
1657
1658static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1659{
1660 struct ocfs2_super *osb;
1661 u32 numbits, freebits;
1662 int status;
1663 struct ocfs2_dinode *bm_lock;
1664 struct buffer_head *bh = NULL;
1665 struct inode *inode = NULL;
1666
1667 trace_ocfs2_statfs(dentry->d_sb, buf);
1668
1669 osb = OCFS2_SB(dentry->d_sb);
1670
1671 inode = ocfs2_get_system_file_inode(osb,
1672 GLOBAL_BITMAP_SYSTEM_INODE,
1673 OCFS2_INVALID_SLOT);
1674 if (!inode) {
1675 mlog(ML_ERROR, "failed to get bitmap inode\n");
1676 status = -EIO;
1677 goto bail;
1678 }
1679
1680 status = ocfs2_inode_lock(inode, &bh, 0);
1681 if (status < 0) {
1682 mlog_errno(status);
1683 goto bail;
1684 }
1685
1686 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1687
1688 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1689 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1690
1691 buf->f_type = OCFS2_SUPER_MAGIC;
1692 buf->f_bsize = dentry->d_sb->s_blocksize;
1693 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1694 buf->f_blocks = ((sector_t) numbits) *
1695 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1696 buf->f_bfree = ((sector_t) freebits) *
1697 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1698 buf->f_bavail = buf->f_bfree;
1699 buf->f_files = numbits;
1700 buf->f_ffree = freebits;
1701 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1702 & 0xFFFFFFFFUL;
1703 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1704 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1705
1706 brelse(bh);
1707
1708 ocfs2_inode_unlock(inode, 0);
1709 status = 0;
1710bail:
1711 iput(inode);
1712
1713 if (status)
1714 mlog_errno(status);
1715
1716 return status;
1717}
1718
1719static void ocfs2_inode_init_once(void *data)
1720{
1721 struct ocfs2_inode_info *oi = data;
1722
1723 oi->ip_flags = 0;
1724 oi->ip_open_count = 0;
1725 spin_lock_init(&oi->ip_lock);
1726 ocfs2_extent_map_init(&oi->vfs_inode);
1727 INIT_LIST_HEAD(&oi->ip_io_markers);
1728 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1729 oi->ip_dir_start_lookup = 0;
1730 init_rwsem(&oi->ip_alloc_sem);
1731 init_rwsem(&oi->ip_xattr_sem);
1732 mutex_init(&oi->ip_io_mutex);
1733
1734 oi->ip_blkno = 0ULL;
1735 oi->ip_clusters = 0;
1736
1737 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1738
1739 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1740 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1741 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1742
1743 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1744 &ocfs2_inode_caching_ops);
1745
1746 inode_init_once(&oi->vfs_inode);
1747}
1748
1749static int ocfs2_initialize_mem_caches(void)
1750{
1751 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1752 sizeof(struct ocfs2_inode_info),
1753 0,
1754 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1755 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1756 ocfs2_inode_init_once);
1757 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1758 sizeof(struct ocfs2_dquot),
1759 0,
1760 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1761 SLAB_MEM_SPREAD),
1762 NULL);
1763 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1764 sizeof(struct ocfs2_quota_chunk),
1765 0,
1766 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1767 NULL);
1768 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1769 !ocfs2_qf_chunk_cachep) {
1770 if (ocfs2_inode_cachep)
1771 kmem_cache_destroy(ocfs2_inode_cachep);
1772 if (ocfs2_dquot_cachep)
1773 kmem_cache_destroy(ocfs2_dquot_cachep);
1774 if (ocfs2_qf_chunk_cachep)
1775 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1776 return -ENOMEM;
1777 }
1778
1779 return 0;
1780}
1781
1782static void ocfs2_free_mem_caches(void)
1783{
1784 /*
1785 * Make sure all delayed rcu free inodes are flushed before we
1786 * destroy cache.
1787 */
1788 rcu_barrier();
1789 if (ocfs2_inode_cachep)
1790 kmem_cache_destroy(ocfs2_inode_cachep);
1791 ocfs2_inode_cachep = NULL;
1792
1793 if (ocfs2_dquot_cachep)
1794 kmem_cache_destroy(ocfs2_dquot_cachep);
1795 ocfs2_dquot_cachep = NULL;
1796
1797 if (ocfs2_qf_chunk_cachep)
1798 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1799 ocfs2_qf_chunk_cachep = NULL;
1800}
1801
1802static int ocfs2_get_sector(struct super_block *sb,
1803 struct buffer_head **bh,
1804 int block,
1805 int sect_size)
1806{
1807 if (!sb_set_blocksize(sb, sect_size)) {
1808 mlog(ML_ERROR, "unable to set blocksize\n");
1809 return -EIO;
1810 }
1811
1812 *bh = sb_getblk(sb, block);
1813 if (!*bh) {
1814 mlog_errno(-ENOMEM);
1815 return -ENOMEM;
1816 }
1817 lock_buffer(*bh);
1818 if (!buffer_dirty(*bh))
1819 clear_buffer_uptodate(*bh);
1820 unlock_buffer(*bh);
1821 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1822 wait_on_buffer(*bh);
1823 if (!buffer_uptodate(*bh)) {
1824 mlog_errno(-EIO);
1825 brelse(*bh);
1826 *bh = NULL;
1827 return -EIO;
1828 }
1829
1830 return 0;
1831}
1832
1833static int ocfs2_mount_volume(struct super_block *sb)
1834{
1835 int status = 0;
1836 int unlock_super = 0;
1837 struct ocfs2_super *osb = OCFS2_SB(sb);
1838
1839 if (ocfs2_is_hard_readonly(osb))
1840 goto leave;
1841
1842 status = ocfs2_dlm_init(osb);
1843 if (status < 0) {
1844 mlog_errno(status);
1845 goto leave;
1846 }
1847
1848 status = ocfs2_super_lock(osb, 1);
1849 if (status < 0) {
1850 mlog_errno(status);
1851 goto leave;
1852 }
1853 unlock_super = 1;
1854
1855 /* This will load up the node map and add ourselves to it. */
1856 status = ocfs2_find_slot(osb);
1857 if (status < 0) {
1858 mlog_errno(status);
1859 goto leave;
1860 }
1861
1862 /* load all node-local system inodes */
1863 status = ocfs2_init_local_system_inodes(osb);
1864 if (status < 0) {
1865 mlog_errno(status);
1866 goto leave;
1867 }
1868
1869 status = ocfs2_check_volume(osb);
1870 if (status < 0) {
1871 mlog_errno(status);
1872 goto leave;
1873 }
1874
1875 status = ocfs2_truncate_log_init(osb);
1876 if (status < 0)
1877 mlog_errno(status);
1878
1879leave:
1880 if (unlock_super)
1881 ocfs2_super_unlock(osb, 1);
1882
1883 return status;
1884}
1885
1886static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1887{
1888 int tmp, hangup_needed = 0;
1889 struct ocfs2_super *osb = NULL;
1890 char nodestr[12];
1891
1892 trace_ocfs2_dismount_volume(sb);
1893
1894 BUG_ON(!sb);
1895 osb = OCFS2_SB(sb);
1896 BUG_ON(!osb);
1897
1898 debugfs_remove(osb->osb_ctxt);
1899
1900 /* Orphan scan should be stopped as early as possible */
1901 ocfs2_orphan_scan_stop(osb);
1902
1903 ocfs2_disable_quotas(osb);
1904
1905 /* All dquots should be freed by now */
1906 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1907 /* Wait for worker to be done with the work structure in osb */
1908 cancel_work_sync(&osb->dquot_drop_work);
1909
1910 ocfs2_shutdown_local_alloc(osb);
1911
1912 ocfs2_truncate_log_shutdown(osb);
1913
1914 /* This will disable recovery and flush any recovery work. */
1915 ocfs2_recovery_exit(osb);
1916
1917 ocfs2_journal_shutdown(osb);
1918
1919 ocfs2_sync_blockdev(sb);
1920
1921 ocfs2_purge_refcount_trees(osb);
1922
1923 /* No cluster connection means we've failed during mount, so skip
1924 * all the steps which depended on that to complete. */
1925 if (osb->cconn) {
1926 tmp = ocfs2_super_lock(osb, 1);
1927 if (tmp < 0) {
1928 mlog_errno(tmp);
1929 return;
1930 }
1931 }
1932
1933 if (osb->slot_num != OCFS2_INVALID_SLOT)
1934 ocfs2_put_slot(osb);
1935
1936 if (osb->cconn)
1937 ocfs2_super_unlock(osb, 1);
1938
1939 ocfs2_release_system_inodes(osb);
1940
1941 /*
1942 * If we're dismounting due to mount error, mount.ocfs2 will clean
1943 * up heartbeat. If we're a local mount, there is no heartbeat.
1944 * If we failed before we got a uuid_str yet, we can't stop
1945 * heartbeat. Otherwise, do it.
1946 */
1947 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1948 !ocfs2_is_hard_readonly(osb))
1949 hangup_needed = 1;
1950
1951 if (osb->cconn)
1952 ocfs2_dlm_shutdown(osb, hangup_needed);
1953
1954 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1955 debugfs_remove(osb->osb_debug_root);
1956
1957 if (hangup_needed)
1958 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1959
1960 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1961
1962 if (ocfs2_mount_local(osb))
1963 snprintf(nodestr, sizeof(nodestr), "local");
1964 else
1965 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1966
1967 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1968 osb->dev_str, nodestr);
1969
1970 ocfs2_delete_osb(osb);
1971 kfree(osb);
1972 sb->s_dev = 0;
1973 sb->s_fs_info = NULL;
1974}
1975
1976static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1977 unsigned uuid_bytes)
1978{
1979 int i, ret;
1980 char *ptr;
1981
1982 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1983
1984 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1985 if (osb->uuid_str == NULL)
1986 return -ENOMEM;
1987
1988 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1989 /* print with null */
1990 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1991 if (ret != 2) /* drop super cleans up */
1992 return -EINVAL;
1993 /* then only advance past the last char */
1994 ptr += 2;
1995 }
1996
1997 return 0;
1998}
1999
2000/* Make sure entire volume is addressable by our journal. Requires
2001 osb_clusters_at_boot to be valid and for the journal to have been
2002 initialized by ocfs2_journal_init(). */
2003static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2004{
2005 int status = 0;
2006 u64 max_block =
2007 ocfs2_clusters_to_blocks(osb->sb,
2008 osb->osb_clusters_at_boot) - 1;
2009
2010 /* 32-bit block number is always OK. */
2011 if (max_block <= (u32)~0ULL)
2012 goto out;
2013
2014 /* Volume is "huge", so see if our journal is new enough to
2015 support it. */
2016 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2017 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2018 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2019 JBD2_FEATURE_INCOMPAT_64BIT))) {
2020 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2021 "Enable the 'block64' journal option with tunefs.ocfs2");
2022 status = -EFBIG;
2023 goto out;
2024 }
2025
2026 out:
2027 return status;
2028}
2029
2030static int ocfs2_initialize_super(struct super_block *sb,
2031 struct buffer_head *bh,
2032 int sector_size,
2033 struct ocfs2_blockcheck_stats *stats)
2034{
2035 int status;
2036 int i, cbits, bbits;
2037 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2038 struct inode *inode = NULL;
2039 struct ocfs2_journal *journal;
2040 struct ocfs2_super *osb;
2041 u64 total_blocks;
2042
2043 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2044 if (!osb) {
2045 status = -ENOMEM;
2046 mlog_errno(status);
2047 goto bail;
2048 }
2049
2050 sb->s_fs_info = osb;
2051 sb->s_op = &ocfs2_sops;
2052 sb->s_d_op = &ocfs2_dentry_ops;
2053 sb->s_export_op = &ocfs2_export_ops;
2054 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2055 sb->dq_op = &ocfs2_quota_operations;
2056 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2057 sb->s_xattr = ocfs2_xattr_handlers;
2058 sb->s_time_gran = 1;
2059 sb->s_flags |= MS_NOATIME;
2060 /* this is needed to support O_LARGEFILE */
2061 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2062 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2063 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2064 memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
2065 sizeof(di->id2.i_super.s_uuid));
2066
2067 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2068
2069 for (i = 0; i < 3; i++)
2070 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2071 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2072
2073 osb->sb = sb;
2074 osb->s_sectsize_bits = blksize_bits(sector_size);
2075 BUG_ON(!osb->s_sectsize_bits);
2076
2077 spin_lock_init(&osb->dc_task_lock);
2078 init_waitqueue_head(&osb->dc_event);
2079 osb->dc_work_sequence = 0;
2080 osb->dc_wake_sequence = 0;
2081 INIT_LIST_HEAD(&osb->blocked_lock_list);
2082 osb->blocked_lock_count = 0;
2083 spin_lock_init(&osb->osb_lock);
2084 spin_lock_init(&osb->osb_xattr_lock);
2085 ocfs2_init_steal_slots(osb);
2086
2087 mutex_init(&osb->system_file_mutex);
2088
2089 atomic_set(&osb->alloc_stats.moves, 0);
2090 atomic_set(&osb->alloc_stats.local_data, 0);
2091 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2092 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2093 atomic_set(&osb->alloc_stats.bg_extends, 0);
2094
2095 /* Copy the blockcheck stats from the superblock probe */
2096 osb->osb_ecc_stats = *stats;
2097
2098 ocfs2_init_node_maps(osb);
2099
2100 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2101 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2102
2103 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2104 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2105 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2106 osb->max_slots);
2107 status = -EINVAL;
2108 goto bail;
2109 }
2110
2111 ocfs2_orphan_scan_init(osb);
2112
2113 status = ocfs2_recovery_init(osb);
2114 if (status) {
2115 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2116 mlog_errno(status);
2117 goto bail;
2118 }
2119
2120 init_waitqueue_head(&osb->checkpoint_event);
2121
2122 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2123
2124 osb->slot_num = OCFS2_INVALID_SLOT;
2125
2126 osb->s_xattr_inline_size = le16_to_cpu(
2127 di->id2.i_super.s_xattr_inline_size);
2128
2129 osb->local_alloc_state = OCFS2_LA_UNUSED;
2130 osb->local_alloc_bh = NULL;
2131 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2132
2133 init_waitqueue_head(&osb->osb_mount_event);
2134
2135 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2136 if (status) {
2137 mlog_errno(status);
2138 goto bail;
2139 }
2140
2141 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2142 if (!osb->vol_label) {
2143 mlog(ML_ERROR, "unable to alloc vol label\n");
2144 status = -ENOMEM;
2145 goto bail;
2146 }
2147
2148 osb->slot_recovery_generations =
2149 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2150 GFP_KERNEL);
2151 if (!osb->slot_recovery_generations) {
2152 status = -ENOMEM;
2153 mlog_errno(status);
2154 goto bail;
2155 }
2156
2157 init_waitqueue_head(&osb->osb_wipe_event);
2158 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2159 sizeof(*osb->osb_orphan_wipes),
2160 GFP_KERNEL);
2161 if (!osb->osb_orphan_wipes) {
2162 status = -ENOMEM;
2163 mlog_errno(status);
2164 goto bail;
2165 }
2166
2167 osb->osb_rf_lock_tree = RB_ROOT;
2168
2169 osb->s_feature_compat =
2170 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2171 osb->s_feature_ro_compat =
2172 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2173 osb->s_feature_incompat =
2174 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2175
2176 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2177 mlog(ML_ERROR, "couldn't mount because of unsupported "
2178 "optional features (%x).\n", i);
2179 status = -EINVAL;
2180 goto bail;
2181 }
2182 if (!(osb->sb->s_flags & MS_RDONLY) &&
2183 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2184 mlog(ML_ERROR, "couldn't mount RDWR because of "
2185 "unsupported optional features (%x).\n", i);
2186 status = -EINVAL;
2187 goto bail;
2188 }
2189
2190 if (ocfs2_clusterinfo_valid(osb)) {
2191 osb->osb_stackflags =
2192 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2193 strlcpy(osb->osb_cluster_stack,
2194 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2195 OCFS2_STACK_LABEL_LEN + 1);
2196 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2197 mlog(ML_ERROR,
2198 "couldn't mount because of an invalid "
2199 "cluster stack label (%s) \n",
2200 osb->osb_cluster_stack);
2201 status = -EINVAL;
2202 goto bail;
2203 }
2204 strlcpy(osb->osb_cluster_name,
2205 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2206 OCFS2_CLUSTER_NAME_LEN + 1);
2207 } else {
2208 /* The empty string is identical with classic tools that
2209 * don't know about s_cluster_info. */
2210 osb->osb_cluster_stack[0] = '\0';
2211 }
2212
2213 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2214
2215 /* FIXME
2216 * This should be done in ocfs2_journal_init(), but unknown
2217 * ordering issues will cause the filesystem to crash.
2218 * If anyone wants to figure out what part of the code
2219 * refers to osb->journal before ocfs2_journal_init() is run,
2220 * be my guest.
2221 */
2222 /* initialize our journal structure */
2223
2224 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2225 if (!journal) {
2226 mlog(ML_ERROR, "unable to alloc journal\n");
2227 status = -ENOMEM;
2228 goto bail;
2229 }
2230 osb->journal = journal;
2231 journal->j_osb = osb;
2232
2233 atomic_set(&journal->j_num_trans, 0);
2234 init_rwsem(&journal->j_trans_barrier);
2235 init_waitqueue_head(&journal->j_checkpointed);
2236 spin_lock_init(&journal->j_lock);
2237 journal->j_trans_id = (unsigned long) 1;
2238 INIT_LIST_HEAD(&journal->j_la_cleanups);
2239 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2240 journal->j_state = OCFS2_JOURNAL_FREE;
2241
2242 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2243 init_llist_head(&osb->dquot_drop_list);
2244
2245 /* get some pseudo constants for clustersize bits */
2246 osb->s_clustersize_bits =
2247 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2248 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2249
2250 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2251 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2252 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2253 osb->s_clustersize);
2254 status = -EINVAL;
2255 goto bail;
2256 }
2257
2258 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2259 le32_to_cpu(di->i_clusters));
2260
2261 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2262 total_blocks);
2263 if (status) {
2264 mlog(ML_ERROR, "Volume too large "
2265 "to mount safely on this system");
2266 status = -EFBIG;
2267 goto bail;
2268 }
2269
2270 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2271 sizeof(di->id2.i_super.s_uuid))) {
2272 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2273 status = -ENOMEM;
2274 goto bail;
2275 }
2276
2277 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2278 OCFS2_MAX_VOL_LABEL_LEN);
2279 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2280 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2281 osb->first_cluster_group_blkno =
2282 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2283 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2284 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2285 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2286 (unsigned long long)osb->root_blkno,
2287 (unsigned long long)osb->system_dir_blkno,
2288 osb->s_clustersize_bits);
2289
2290 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2291 if (!osb->osb_dlm_debug) {
2292 status = -ENOMEM;
2293 mlog_errno(status);
2294 goto bail;
2295 }
2296
2297 atomic_set(&osb->vol_state, VOLUME_INIT);
2298
2299 /* load root, system_dir, and all global system inodes */
2300 status = ocfs2_init_global_system_inodes(osb);
2301 if (status < 0) {
2302 mlog_errno(status);
2303 goto bail;
2304 }
2305
2306 /*
2307 * global bitmap
2308 */
2309 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2310 OCFS2_INVALID_SLOT);
2311 if (!inode) {
2312 status = -EINVAL;
2313 mlog_errno(status);
2314 goto bail;
2315 }
2316
2317 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2318 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2319 iput(inode);
2320
2321 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2322 osb->s_feature_incompat) * 8;
2323
2324 status = ocfs2_init_slot_info(osb);
2325 if (status < 0) {
2326 mlog_errno(status);
2327 goto bail;
2328 }
2329 cleancache_init_shared_fs(sb);
2330
2331 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2332 if (!osb->ocfs2_wq) {
2333 status = -ENOMEM;
2334 mlog_errno(status);
2335 }
2336
2337bail:
2338 return status;
2339}
2340
2341/*
2342 * will return: -EAGAIN if it is ok to keep searching for superblocks
2343 * -EINVAL if there is a bad superblock
2344 * 0 on success
2345 */
2346static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2347 struct buffer_head *bh,
2348 u32 blksz,
2349 struct ocfs2_blockcheck_stats *stats)
2350{
2351 int status = -EAGAIN;
2352
2353 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2354 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2355 /* We have to do a raw check of the feature here */
2356 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2357 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2358 status = ocfs2_block_check_validate(bh->b_data,
2359 bh->b_size,
2360 &di->i_check,
2361 stats);
2362 if (status)
2363 goto out;
2364 }
2365 status = -EINVAL;
2366 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2367 mlog(ML_ERROR, "found superblock with incorrect block "
2368 "size: found %u, should be %u\n",
2369 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2370 blksz);
2371 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2372 OCFS2_MAJOR_REV_LEVEL ||
2373 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2374 OCFS2_MINOR_REV_LEVEL) {
2375 mlog(ML_ERROR, "found superblock with bad version: "
2376 "found %u.%u, should be %u.%u\n",
2377 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2378 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2379 OCFS2_MAJOR_REV_LEVEL,
2380 OCFS2_MINOR_REV_LEVEL);
2381 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2382 mlog(ML_ERROR, "bad block number on superblock: "
2383 "found %llu, should be %llu\n",
2384 (unsigned long long)le64_to_cpu(di->i_blkno),
2385 (unsigned long long)bh->b_blocknr);
2386 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2387 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2388 mlog(ML_ERROR, "bad cluster size found: %u\n",
2389 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2390 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2391 mlog(ML_ERROR, "bad root_blkno: 0\n");
2392 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2393 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2394 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2395 mlog(ML_ERROR,
2396 "Superblock slots found greater than file system "
2397 "maximum: found %u, max %u\n",
2398 le16_to_cpu(di->id2.i_super.s_max_slots),
2399 OCFS2_MAX_SLOTS);
2400 } else {
2401 /* found it! */
2402 status = 0;
2403 }
2404 }
2405
2406out:
2407 if (status && status != -EAGAIN)
2408 mlog_errno(status);
2409 return status;
2410}
2411
2412static int ocfs2_check_volume(struct ocfs2_super *osb)
2413{
2414 int status;
2415 int dirty;
2416 int local;
2417 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2418 * recover
2419 * ourselves. */
2420
2421 /* Init our journal object. */
2422 status = ocfs2_journal_init(osb->journal, &dirty);
2423 if (status < 0) {
2424 mlog(ML_ERROR, "Could not initialize journal!\n");
2425 goto finally;
2426 }
2427
2428 /* Now that journal has been initialized, check to make sure
2429 entire volume is addressable. */
2430 status = ocfs2_journal_addressable(osb);
2431 if (status)
2432 goto finally;
2433
2434 /* If the journal was unmounted cleanly then we don't want to
2435 * recover anything. Otherwise, journal_load will do that
2436 * dirty work for us :) */
2437 if (!dirty) {
2438 status = ocfs2_journal_wipe(osb->journal, 0);
2439 if (status < 0) {
2440 mlog_errno(status);
2441 goto finally;
2442 }
2443 } else {
2444 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2445 "unmounted cleanly, recovering it.\n", osb->dev_str);
2446 }
2447
2448 local = ocfs2_mount_local(osb);
2449
2450 /* will play back anything left in the journal. */
2451 status = ocfs2_journal_load(osb->journal, local, dirty);
2452 if (status < 0) {
2453 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2454 goto finally;
2455 }
2456
2457 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2458 jbd2_journal_set_features(osb->journal->j_journal,
2459 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2460 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2461 else
2462 jbd2_journal_clear_features(osb->journal->j_journal,
2463 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2464 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2465
2466 if (dirty) {
2467 /* recover my local alloc if we didn't unmount cleanly. */
2468 status = ocfs2_begin_local_alloc_recovery(osb,
2469 osb->slot_num,
2470 &local_alloc);
2471 if (status < 0) {
2472 mlog_errno(status);
2473 goto finally;
2474 }
2475 /* we complete the recovery process after we've marked
2476 * ourselves as mounted. */
2477 }
2478
2479 status = ocfs2_load_local_alloc(osb);
2480 if (status < 0) {
2481 mlog_errno(status);
2482 goto finally;
2483 }
2484
2485 if (dirty) {
2486 /* Recovery will be completed after we've mounted the
2487 * rest of the volume. */
2488 osb->dirty = 1;
2489 osb->local_alloc_copy = local_alloc;
2490 local_alloc = NULL;
2491 }
2492
2493 /* go through each journal, trylock it and if you get the
2494 * lock, and it's marked as dirty, set the bit in the recover
2495 * map and launch a recovery thread for it. */
2496 status = ocfs2_mark_dead_nodes(osb);
2497 if (status < 0) {
2498 mlog_errno(status);
2499 goto finally;
2500 }
2501
2502 status = ocfs2_compute_replay_slots(osb);
2503 if (status < 0)
2504 mlog_errno(status);
2505
2506finally:
2507 kfree(local_alloc);
2508
2509 if (status)
2510 mlog_errno(status);
2511 return status;
2512}
2513
2514/*
2515 * The routine gets called from dismount or close whenever a dismount on
2516 * volume is requested and the osb open count becomes 1.
2517 * It will remove the osb from the global list and also free up all the
2518 * initialized resources and fileobject.
2519 */
2520static void ocfs2_delete_osb(struct ocfs2_super *osb)
2521{
2522 /* This function assumes that the caller has the main osb resource */
2523
2524 /* ocfs2_initializer_super have already created this workqueue */
2525 if (osb->ocfs2_wq) {
2526 flush_workqueue(osb->ocfs2_wq);
2527 destroy_workqueue(osb->ocfs2_wq);
2528 }
2529
2530 ocfs2_free_slot_info(osb);
2531
2532 kfree(osb->osb_orphan_wipes);
2533 kfree(osb->slot_recovery_generations);
2534 /* FIXME
2535 * This belongs in journal shutdown, but because we have to
2536 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2537 * we free it here.
2538 */
2539 kfree(osb->journal);
2540 kfree(osb->local_alloc_copy);
2541 kfree(osb->uuid_str);
2542 kfree(osb->vol_label);
2543 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2544 memset(osb, 0, sizeof(struct ocfs2_super));
2545}
2546
2547/* Depending on the mount option passed, perform one of the following:
2548 * Put OCFS2 into a readonly state (default)
2549 * Return EIO so that only the process errs
2550 * Fix the error as if fsck.ocfs2 -y
2551 * panic
2552 */
2553static int ocfs2_handle_error(struct super_block *sb)
2554{
2555 struct ocfs2_super *osb = OCFS2_SB(sb);
2556 int rv = 0;
2557
2558 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2559 pr_crit("On-disk corruption discovered. "
2560 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2561
2562 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2563 panic("OCFS2: (device %s): panic forced after error\n",
2564 sb->s_id);
2565 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2566 pr_crit("OCFS2: Returning error to the calling process.\n");
2567 rv = -EIO;
2568 } else { /* default option */
2569 rv = -EROFS;
2570 if (sb->s_flags & MS_RDONLY &&
2571 (ocfs2_is_soft_readonly(osb) ||
2572 ocfs2_is_hard_readonly(osb)))
2573 return rv;
2574
2575 pr_crit("OCFS2: File system is now read-only.\n");
2576 sb->s_flags |= MS_RDONLY;
2577 ocfs2_set_ro_flag(osb, 0);
2578 }
2579
2580 return rv;
2581}
2582
2583int __ocfs2_error(struct super_block *sb, const char *function,
2584 const char *fmt, ...)
2585{
2586 struct va_format vaf;
2587 va_list args;
2588
2589 va_start(args, fmt);
2590 vaf.fmt = fmt;
2591 vaf.va = &args;
2592
2593 /* Not using mlog here because we want to show the actual
2594 * function the error came from. */
2595 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2596 sb->s_id, function, &vaf);
2597
2598 va_end(args);
2599
2600 return ocfs2_handle_error(sb);
2601}
2602
2603/* Handle critical errors. This is intentionally more drastic than
2604 * ocfs2_handle_error, so we only use for things like journal errors,
2605 * etc. */
2606void __ocfs2_abort(struct super_block *sb, const char *function,
2607 const char *fmt, ...)
2608{
2609 struct va_format vaf;
2610 va_list args;
2611
2612 va_start(args, fmt);
2613
2614 vaf.fmt = fmt;
2615 vaf.va = &args;
2616
2617 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2618 sb->s_id, function, &vaf);
2619
2620 va_end(args);
2621
2622 /* We don't have the cluster support yet to go straight to
2623 * hard readonly in here. Until then, we want to keep
2624 * ocfs2_abort() so that we can at least mark critical
2625 * errors.
2626 *
2627 * TODO: This should abort the journal and alert other nodes
2628 * that our slot needs recovery. */
2629
2630 /* Force a panic(). This stinks, but it's better than letting
2631 * things continue without having a proper hard readonly
2632 * here. */
2633 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2634 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2635 ocfs2_handle_error(sb);
2636}
2637
2638/*
2639 * Void signal blockers, because in-kernel sigprocmask() only fails
2640 * when SIG_* is wrong.
2641 */
2642void ocfs2_block_signals(sigset_t *oldset)
2643{
2644 int rc;
2645 sigset_t blocked;
2646
2647 sigfillset(&blocked);
2648 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2649 BUG_ON(rc);
2650}
2651
2652void ocfs2_unblock_signals(sigset_t *oldset)
2653{
2654 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2655 BUG_ON(rc);
2656}
2657
2658module_init(ocfs2_init);
2659module_exit(ocfs2_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * super.c
4 *
5 * load/unload driver, mount/dismount volumes
6 *
7 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
8 */
9
10#include <linux/module.h>
11#include <linux/fs.h>
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <linux/highmem.h>
15#include <linux/init.h>
16#include <linux/random.h>
17#include <linux/statfs.h>
18#include <linux/moduleparam.h>
19#include <linux/blkdev.h>
20#include <linux/socket.h>
21#include <linux/inet.h>
22#include <linux/parser.h>
23#include <linux/crc32.h>
24#include <linux/debugfs.h>
25#include <linux/mount.h>
26#include <linux/seq_file.h>
27#include <linux/quotaops.h>
28#include <linux/signal.h>
29
30#define CREATE_TRACE_POINTS
31#include "ocfs2_trace.h"
32
33#include <cluster/masklog.h>
34
35#include "ocfs2.h"
36
37/* this should be the only file to include a version 1 header */
38#include "ocfs1_fs_compat.h"
39
40#include "alloc.h"
41#include "aops.h"
42#include "blockcheck.h"
43#include "dlmglue.h"
44#include "export.h"
45#include "extent_map.h"
46#include "heartbeat.h"
47#include "inode.h"
48#include "journal.h"
49#include "localalloc.h"
50#include "namei.h"
51#include "slot_map.h"
52#include "super.h"
53#include "sysfile.h"
54#include "uptodate.h"
55#include "xattr.h"
56#include "quota.h"
57#include "refcounttree.h"
58#include "suballoc.h"
59
60#include "buffer_head_io.h"
61#include "filecheck.h"
62
63static struct kmem_cache *ocfs2_inode_cachep;
64struct kmem_cache *ocfs2_dquot_cachep;
65struct kmem_cache *ocfs2_qf_chunk_cachep;
66
67static struct dentry *ocfs2_debugfs_root;
68
69MODULE_AUTHOR("Oracle");
70MODULE_LICENSE("GPL");
71MODULE_DESCRIPTION("OCFS2 cluster file system");
72
73struct mount_options
74{
75 unsigned long commit_interval;
76 unsigned long mount_opt;
77 unsigned int atime_quantum;
78 unsigned short slot;
79 int localalloc_opt;
80 unsigned int resv_level;
81 int dir_resv_level;
82 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
83};
84
85static int ocfs2_parse_options(struct super_block *sb, char *options,
86 struct mount_options *mopt,
87 int is_remount);
88static int ocfs2_check_set_options(struct super_block *sb,
89 struct mount_options *options);
90static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
91static void ocfs2_put_super(struct super_block *sb);
92static int ocfs2_mount_volume(struct super_block *sb);
93static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
94static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
95static int ocfs2_initialize_mem_caches(void);
96static void ocfs2_free_mem_caches(void);
97static void ocfs2_delete_osb(struct ocfs2_super *osb);
98
99static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
100
101static int ocfs2_sync_fs(struct super_block *sb, int wait);
102
103static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
104static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
105static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
106static int ocfs2_check_volume(struct ocfs2_super *osb);
107static int ocfs2_verify_volume(struct ocfs2_dinode *di,
108 struct buffer_head *bh,
109 u32 sectsize,
110 struct ocfs2_blockcheck_stats *stats);
111static int ocfs2_initialize_super(struct super_block *sb,
112 struct buffer_head *bh,
113 int sector_size,
114 struct ocfs2_blockcheck_stats *stats);
115static int ocfs2_get_sector(struct super_block *sb,
116 struct buffer_head **bh,
117 int block,
118 int sect_size);
119static struct inode *ocfs2_alloc_inode(struct super_block *sb);
120static void ocfs2_free_inode(struct inode *inode);
121static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
122static int ocfs2_enable_quotas(struct ocfs2_super *osb);
123static void ocfs2_disable_quotas(struct ocfs2_super *osb);
124
125static struct dquot __rcu **ocfs2_get_dquots(struct inode *inode)
126{
127 return OCFS2_I(inode)->i_dquot;
128}
129
130static const struct super_operations ocfs2_sops = {
131 .statfs = ocfs2_statfs,
132 .alloc_inode = ocfs2_alloc_inode,
133 .free_inode = ocfs2_free_inode,
134 .drop_inode = ocfs2_drop_inode,
135 .evict_inode = ocfs2_evict_inode,
136 .sync_fs = ocfs2_sync_fs,
137 .put_super = ocfs2_put_super,
138 .remount_fs = ocfs2_remount,
139 .show_options = ocfs2_show_options,
140 .quota_read = ocfs2_quota_read,
141 .quota_write = ocfs2_quota_write,
142 .get_dquots = ocfs2_get_dquots,
143};
144
145enum {
146 Opt_barrier,
147 Opt_err_panic,
148 Opt_err_ro,
149 Opt_intr,
150 Opt_nointr,
151 Opt_hb_none,
152 Opt_hb_local,
153 Opt_hb_global,
154 Opt_data_ordered,
155 Opt_data_writeback,
156 Opt_atime_quantum,
157 Opt_slot,
158 Opt_commit,
159 Opt_localalloc,
160 Opt_localflocks,
161 Opt_stack,
162 Opt_user_xattr,
163 Opt_nouser_xattr,
164 Opt_inode64,
165 Opt_acl,
166 Opt_noacl,
167 Opt_usrquota,
168 Opt_grpquota,
169 Opt_coherency_buffered,
170 Opt_coherency_full,
171 Opt_resv_level,
172 Opt_dir_resv_level,
173 Opt_journal_async_commit,
174 Opt_err_cont,
175 Opt_err,
176};
177
178static const match_table_t tokens = {
179 {Opt_barrier, "barrier=%u"},
180 {Opt_err_panic, "errors=panic"},
181 {Opt_err_ro, "errors=remount-ro"},
182 {Opt_intr, "intr"},
183 {Opt_nointr, "nointr"},
184 {Opt_hb_none, OCFS2_HB_NONE},
185 {Opt_hb_local, OCFS2_HB_LOCAL},
186 {Opt_hb_global, OCFS2_HB_GLOBAL},
187 {Opt_data_ordered, "data=ordered"},
188 {Opt_data_writeback, "data=writeback"},
189 {Opt_atime_quantum, "atime_quantum=%u"},
190 {Opt_slot, "preferred_slot=%u"},
191 {Opt_commit, "commit=%u"},
192 {Opt_localalloc, "localalloc=%d"},
193 {Opt_localflocks, "localflocks"},
194 {Opt_stack, "cluster_stack=%s"},
195 {Opt_user_xattr, "user_xattr"},
196 {Opt_nouser_xattr, "nouser_xattr"},
197 {Opt_inode64, "inode64"},
198 {Opt_acl, "acl"},
199 {Opt_noacl, "noacl"},
200 {Opt_usrquota, "usrquota"},
201 {Opt_grpquota, "grpquota"},
202 {Opt_coherency_buffered, "coherency=buffered"},
203 {Opt_coherency_full, "coherency=full"},
204 {Opt_resv_level, "resv_level=%u"},
205 {Opt_dir_resv_level, "dir_resv_level=%u"},
206 {Opt_journal_async_commit, "journal_async_commit"},
207 {Opt_err_cont, "errors=continue"},
208 {Opt_err, NULL}
209};
210
211#ifdef CONFIG_DEBUG_FS
212static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
213{
214 struct ocfs2_cluster_connection *cconn = osb->cconn;
215 struct ocfs2_recovery_map *rm = osb->recovery_map;
216 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
217 int i, out = 0;
218 unsigned long flags;
219
220 out += scnprintf(buf + out, len - out,
221 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
222 "Device", osb->dev_str, osb->uuid_str,
223 osb->fs_generation, osb->vol_label);
224
225 out += scnprintf(buf + out, len - out,
226 "%10s => State: %d Flags: 0x%lX\n", "Volume",
227 atomic_read(&osb->vol_state), osb->osb_flags);
228
229 out += scnprintf(buf + out, len - out,
230 "%10s => Block: %lu Cluster: %d\n", "Sizes",
231 osb->sb->s_blocksize, osb->s_clustersize);
232
233 out += scnprintf(buf + out, len - out,
234 "%10s => Compat: 0x%X Incompat: 0x%X "
235 "ROcompat: 0x%X\n",
236 "Features", osb->s_feature_compat,
237 osb->s_feature_incompat, osb->s_feature_ro_compat);
238
239 out += scnprintf(buf + out, len - out,
240 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
241 osb->s_mount_opt, osb->s_atime_quantum);
242
243 if (cconn) {
244 out += scnprintf(buf + out, len - out,
245 "%10s => Stack: %s Name: %*s "
246 "Version: %d.%d\n", "Cluster",
247 (*osb->osb_cluster_stack == '\0' ?
248 "o2cb" : osb->osb_cluster_stack),
249 cconn->cc_namelen, cconn->cc_name,
250 cconn->cc_version.pv_major,
251 cconn->cc_version.pv_minor);
252 }
253
254 spin_lock_irqsave(&osb->dc_task_lock, flags);
255 out += scnprintf(buf + out, len - out,
256 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
257 "WorkSeq: %lu\n", "DownCnvt",
258 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
259 osb->blocked_lock_count, osb->dc_wake_sequence,
260 osb->dc_work_sequence);
261 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
262
263 spin_lock(&osb->osb_lock);
264 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
265 "Recovery",
266 (osb->recovery_thread_task ?
267 task_pid_nr(osb->recovery_thread_task) : -1));
268 if (rm->rm_used == 0)
269 out += scnprintf(buf + out, len - out, " None\n");
270 else {
271 for (i = 0; i < rm->rm_used; i++)
272 out += scnprintf(buf + out, len - out, " %d",
273 rm->rm_entries[i]);
274 out += scnprintf(buf + out, len - out, "\n");
275 }
276 spin_unlock(&osb->osb_lock);
277
278 out += scnprintf(buf + out, len - out,
279 "%10s => Pid: %d Interval: %lu\n", "Commit",
280 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
281 osb->osb_commit_interval);
282
283 out += scnprintf(buf + out, len - out,
284 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
285 "Journal", osb->journal->j_state,
286 osb->journal->j_trans_id,
287 atomic_read(&osb->journal->j_num_trans));
288
289 out += scnprintf(buf + out, len - out,
290 "%10s => GlobalAllocs: %d LocalAllocs: %d "
291 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
292 "Stats",
293 atomic_read(&osb->alloc_stats.bitmap_data),
294 atomic_read(&osb->alloc_stats.local_data),
295 atomic_read(&osb->alloc_stats.bg_allocs),
296 atomic_read(&osb->alloc_stats.moves),
297 atomic_read(&osb->alloc_stats.bg_extends));
298
299 out += scnprintf(buf + out, len - out,
300 "%10s => State: %u Descriptor: %llu Size: %u bits "
301 "Default: %u bits\n",
302 "LocalAlloc", osb->local_alloc_state,
303 (unsigned long long)osb->la_last_gd,
304 osb->local_alloc_bits, osb->local_alloc_default_bits);
305
306 spin_lock(&osb->osb_lock);
307 out += scnprintf(buf + out, len - out,
308 "%10s => InodeSlot: %d StolenInodes: %d, "
309 "MetaSlot: %d StolenMeta: %d\n", "Steal",
310 osb->s_inode_steal_slot,
311 atomic_read(&osb->s_num_inodes_stolen),
312 osb->s_meta_steal_slot,
313 atomic_read(&osb->s_num_meta_stolen));
314 spin_unlock(&osb->osb_lock);
315
316 out += scnprintf(buf + out, len - out, "OrphanScan => ");
317 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ",
318 os->os_count, os->os_seqno);
319 out += scnprintf(buf + out, len - out, " Last Scan: ");
320 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
321 out += scnprintf(buf + out, len - out, "Disabled\n");
322 else
323 out += scnprintf(buf + out, len - out, "%lu seconds ago\n",
324 (unsigned long)(ktime_get_seconds() - os->os_scantime));
325
326 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n",
327 "Slots", "Num", "RecoGen");
328 for (i = 0; i < osb->max_slots; ++i) {
329 out += scnprintf(buf + out, len - out,
330 "%10s %c %3d %10d\n",
331 " ",
332 (i == osb->slot_num ? '*' : ' '),
333 i, osb->slot_recovery_generations[i]);
334 }
335
336 return out;
337}
338
339static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
340{
341 struct ocfs2_super *osb = inode->i_private;
342 char *buf = NULL;
343
344 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
345 if (!buf)
346 goto bail;
347
348 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
349
350 file->private_data = buf;
351
352 return 0;
353bail:
354 return -ENOMEM;
355}
356
357static int ocfs2_debug_release(struct inode *inode, struct file *file)
358{
359 kfree(file->private_data);
360 return 0;
361}
362
363static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
364 size_t nbytes, loff_t *ppos)
365{
366 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
367 i_size_read(file->f_mapping->host));
368}
369#else
370static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
371{
372 return 0;
373}
374static int ocfs2_debug_release(struct inode *inode, struct file *file)
375{
376 return 0;
377}
378static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
379 size_t nbytes, loff_t *ppos)
380{
381 return 0;
382}
383#endif /* CONFIG_DEBUG_FS */
384
385static const struct file_operations ocfs2_osb_debug_fops = {
386 .open = ocfs2_osb_debug_open,
387 .release = ocfs2_debug_release,
388 .read = ocfs2_debug_read,
389 .llseek = generic_file_llseek,
390};
391
392static int ocfs2_sync_fs(struct super_block *sb, int wait)
393{
394 int status;
395 tid_t target;
396 struct ocfs2_super *osb = OCFS2_SB(sb);
397
398 if (ocfs2_is_hard_readonly(osb))
399 return -EROFS;
400
401 if (wait) {
402 status = ocfs2_flush_truncate_log(osb);
403 if (status < 0)
404 mlog_errno(status);
405 } else {
406 ocfs2_schedule_truncate_log_flush(osb, 0);
407 }
408
409 if (jbd2_journal_start_commit(osb->journal->j_journal,
410 &target)) {
411 if (wait)
412 jbd2_log_wait_commit(osb->journal->j_journal,
413 target);
414 }
415 return 0;
416}
417
418static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
419{
420 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
421 && (ino == USER_QUOTA_SYSTEM_INODE
422 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
423 return 0;
424 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
425 && (ino == GROUP_QUOTA_SYSTEM_INODE
426 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
427 return 0;
428 return 1;
429}
430
431static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
432{
433 struct inode *new = NULL;
434 int status = 0;
435 int i;
436
437 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
438 if (IS_ERR(new)) {
439 status = PTR_ERR(new);
440 mlog_errno(status);
441 goto bail;
442 }
443 osb->root_inode = new;
444
445 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
446 if (IS_ERR(new)) {
447 status = PTR_ERR(new);
448 mlog_errno(status);
449 goto bail;
450 }
451 osb->sys_root_inode = new;
452
453 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
454 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
455 if (!ocfs2_need_system_inode(osb, i))
456 continue;
457 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
458 if (!new) {
459 ocfs2_release_system_inodes(osb);
460 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
461 mlog_errno(status);
462 mlog(ML_ERROR, "Unable to load system inode %d, "
463 "possibly corrupt fs?", i);
464 goto bail;
465 }
466 // the array now has one ref, so drop this one
467 iput(new);
468 }
469
470bail:
471 if (status)
472 mlog_errno(status);
473 return status;
474}
475
476static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
477{
478 struct inode *new = NULL;
479 int status = 0;
480 int i;
481
482 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
483 i < NUM_SYSTEM_INODES;
484 i++) {
485 if (!ocfs2_need_system_inode(osb, i))
486 continue;
487 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
488 if (!new) {
489 ocfs2_release_system_inodes(osb);
490 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
491 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
492 status, i, osb->slot_num);
493 goto bail;
494 }
495 /* the array now has one ref, so drop this one */
496 iput(new);
497 }
498
499bail:
500 if (status)
501 mlog_errno(status);
502 return status;
503}
504
505static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
506{
507 int i;
508 struct inode *inode;
509
510 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
511 inode = osb->global_system_inodes[i];
512 if (inode) {
513 iput(inode);
514 osb->global_system_inodes[i] = NULL;
515 }
516 }
517
518 inode = osb->sys_root_inode;
519 if (inode) {
520 iput(inode);
521 osb->sys_root_inode = NULL;
522 }
523
524 inode = osb->root_inode;
525 if (inode) {
526 iput(inode);
527 osb->root_inode = NULL;
528 }
529
530 if (!osb->local_system_inodes)
531 return;
532
533 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
534 if (osb->local_system_inodes[i]) {
535 iput(osb->local_system_inodes[i]);
536 osb->local_system_inodes[i] = NULL;
537 }
538 }
539
540 kfree(osb->local_system_inodes);
541 osb->local_system_inodes = NULL;
542}
543
544/* We're allocating fs objects, use GFP_NOFS */
545static struct inode *ocfs2_alloc_inode(struct super_block *sb)
546{
547 struct ocfs2_inode_info *oi;
548
549 oi = alloc_inode_sb(sb, ocfs2_inode_cachep, GFP_NOFS);
550 if (!oi)
551 return NULL;
552
553 oi->i_sync_tid = 0;
554 oi->i_datasync_tid = 0;
555 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
556
557 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
558 return &oi->vfs_inode;
559}
560
561static void ocfs2_free_inode(struct inode *inode)
562{
563 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
564}
565
566static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
567 unsigned int cbits)
568{
569 unsigned int bytes = 1 << cbits;
570 unsigned int trim = bytes;
571 unsigned int bitshift = 32;
572
573 /*
574 * i_size and all block offsets in ocfs2 are always 64 bits
575 * wide. i_clusters is 32 bits, in cluster-sized units. So on
576 * 64 bit platforms, cluster size will be the limiting factor.
577 */
578
579#if BITS_PER_LONG == 32
580 BUILD_BUG_ON(sizeof(sector_t) != 8);
581 /*
582 * We might be limited by page cache size.
583 */
584 if (bytes > PAGE_SIZE) {
585 bytes = PAGE_SIZE;
586 trim = 1;
587 /*
588 * Shift by 31 here so that we don't get larger than
589 * MAX_LFS_FILESIZE
590 */
591 bitshift = 31;
592 }
593#endif
594
595 /*
596 * Trim by a whole cluster when we can actually approach the
597 * on-disk limits. Otherwise we can overflow i_clusters when
598 * an extent start is at the max offset.
599 */
600 return (((unsigned long long)bytes) << bitshift) - trim;
601}
602
603static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
604{
605 int incompat_features;
606 int ret = 0;
607 struct mount_options parsed_options;
608 struct ocfs2_super *osb = OCFS2_SB(sb);
609 u32 tmp;
610
611 sync_filesystem(sb);
612
613 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
614 !ocfs2_check_set_options(sb, &parsed_options)) {
615 ret = -EINVAL;
616 goto out;
617 }
618
619 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
620 OCFS2_MOUNT_HB_NONE;
621 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
622 ret = -EINVAL;
623 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
624 goto out;
625 }
626
627 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
628 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
629 ret = -EINVAL;
630 mlog(ML_ERROR, "Cannot change data mode on remount\n");
631 goto out;
632 }
633
634 /* Probably don't want this on remount; it might
635 * mess with other nodes */
636 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
637 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
638 ret = -EINVAL;
639 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
640 goto out;
641 }
642
643 /* We're going to/from readonly mode. */
644 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
645 /* Disable quota accounting before remounting RO */
646 if (*flags & SB_RDONLY) {
647 ret = ocfs2_susp_quotas(osb, 0);
648 if (ret < 0)
649 goto out;
650 }
651 /* Lock here so the check of HARD_RO and the potential
652 * setting of SOFT_RO is atomic. */
653 spin_lock(&osb->osb_lock);
654 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
655 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
656 ret = -EROFS;
657 goto unlock_osb;
658 }
659
660 if (*flags & SB_RDONLY) {
661 sb->s_flags |= SB_RDONLY;
662 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
663 } else {
664 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
665 mlog(ML_ERROR, "Cannot remount RDWR "
666 "filesystem due to previous errors.\n");
667 ret = -EROFS;
668 goto unlock_osb;
669 }
670 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
671 if (incompat_features) {
672 mlog(ML_ERROR, "Cannot remount RDWR because "
673 "of unsupported optional features "
674 "(%x).\n", incompat_features);
675 ret = -EINVAL;
676 goto unlock_osb;
677 }
678 sb->s_flags &= ~SB_RDONLY;
679 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
680 }
681 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
682unlock_osb:
683 spin_unlock(&osb->osb_lock);
684 /* Enable quota accounting after remounting RW */
685 if (!ret && !(*flags & SB_RDONLY)) {
686 if (sb_any_quota_suspended(sb))
687 ret = ocfs2_susp_quotas(osb, 1);
688 else
689 ret = ocfs2_enable_quotas(osb);
690 if (ret < 0) {
691 /* Return back changes... */
692 spin_lock(&osb->osb_lock);
693 sb->s_flags |= SB_RDONLY;
694 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
695 spin_unlock(&osb->osb_lock);
696 goto out;
697 }
698 }
699 }
700
701 if (!ret) {
702 /* Only save off the new mount options in case of a successful
703 * remount. */
704 osb->s_mount_opt = parsed_options.mount_opt;
705 osb->s_atime_quantum = parsed_options.atime_quantum;
706 osb->preferred_slot = parsed_options.slot;
707 if (parsed_options.commit_interval)
708 osb->osb_commit_interval = parsed_options.commit_interval;
709
710 if (!ocfs2_is_hard_readonly(osb))
711 ocfs2_set_journal_params(osb);
712
713 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
714 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
715 SB_POSIXACL : 0);
716 }
717out:
718 return ret;
719}
720
721static int ocfs2_sb_probe(struct super_block *sb,
722 struct buffer_head **bh,
723 int *sector_size,
724 struct ocfs2_blockcheck_stats *stats)
725{
726 int status, tmpstat;
727 struct ocfs1_vol_disk_hdr *hdr;
728 struct ocfs2_dinode *di;
729 int blksize;
730
731 *bh = NULL;
732
733 /* may be > 512 */
734 *sector_size = bdev_logical_block_size(sb->s_bdev);
735 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
736 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
737 *sector_size, OCFS2_MAX_BLOCKSIZE);
738 status = -EINVAL;
739 goto bail;
740 }
741
742 /* Can this really happen? */
743 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
744 *sector_size = OCFS2_MIN_BLOCKSIZE;
745
746 /* check block zero for old format */
747 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
748 if (status < 0) {
749 mlog_errno(status);
750 goto bail;
751 }
752 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
753 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
754 mlog(ML_ERROR, "incompatible version: %u.%u\n",
755 hdr->major_version, hdr->minor_version);
756 status = -EINVAL;
757 }
758 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
759 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
760 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
761 hdr->signature);
762 status = -EINVAL;
763 }
764 brelse(*bh);
765 *bh = NULL;
766 if (status < 0) {
767 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
768 "upgraded before mounting with ocfs v2\n");
769 goto bail;
770 }
771
772 /*
773 * Now check at magic offset for 512, 1024, 2048, 4096
774 * blocksizes. 4096 is the maximum blocksize because it is
775 * the minimum clustersize.
776 */
777 status = -EINVAL;
778 for (blksize = *sector_size;
779 blksize <= OCFS2_MAX_BLOCKSIZE;
780 blksize <<= 1) {
781 tmpstat = ocfs2_get_sector(sb, bh,
782 OCFS2_SUPER_BLOCK_BLKNO,
783 blksize);
784 if (tmpstat < 0) {
785 status = tmpstat;
786 mlog_errno(status);
787 break;
788 }
789 di = (struct ocfs2_dinode *) (*bh)->b_data;
790 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
791 spin_lock_init(&stats->b_lock);
792 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
793 if (tmpstat < 0) {
794 brelse(*bh);
795 *bh = NULL;
796 }
797 if (tmpstat != -EAGAIN) {
798 status = tmpstat;
799 break;
800 }
801 }
802
803bail:
804 return status;
805}
806
807static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
808{
809 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
810
811 if (osb->s_mount_opt & hb_enabled) {
812 if (ocfs2_mount_local(osb)) {
813 mlog(ML_ERROR, "Cannot heartbeat on a locally "
814 "mounted device.\n");
815 return -EINVAL;
816 }
817 if (ocfs2_userspace_stack(osb)) {
818 mlog(ML_ERROR, "Userspace stack expected, but "
819 "o2cb heartbeat arguments passed to mount\n");
820 return -EINVAL;
821 }
822 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
823 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
824 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
825 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
826 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
827 return -EINVAL;
828 }
829 }
830
831 if (!(osb->s_mount_opt & hb_enabled)) {
832 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
833 !ocfs2_userspace_stack(osb)) {
834 mlog(ML_ERROR, "Heartbeat has to be started to mount "
835 "a read-write clustered device.\n");
836 return -EINVAL;
837 }
838 }
839
840 return 0;
841}
842
843/*
844 * If we're using a userspace stack, mount should have passed
845 * a name that matches the disk. If not, mount should not
846 * have passed a stack.
847 */
848static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
849 struct mount_options *mopt)
850{
851 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
852 mlog(ML_ERROR,
853 "cluster stack passed to mount, but this filesystem "
854 "does not support it\n");
855 return -EINVAL;
856 }
857
858 if (ocfs2_userspace_stack(osb) &&
859 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
860 OCFS2_STACK_LABEL_LEN)) {
861 mlog(ML_ERROR,
862 "cluster stack passed to mount (\"%s\") does not "
863 "match the filesystem (\"%s\")\n",
864 mopt->cluster_stack,
865 osb->osb_cluster_stack);
866 return -EINVAL;
867 }
868
869 return 0;
870}
871
872static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
873{
874 int type;
875 struct super_block *sb = osb->sb;
876 unsigned int feature[OCFS2_MAXQUOTAS] = {
877 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
878 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
879 int status = 0;
880
881 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
882 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
883 continue;
884 if (unsuspend)
885 status = dquot_resume(sb, type);
886 else {
887 struct ocfs2_mem_dqinfo *oinfo;
888
889 /* Cancel periodic syncing before suspending */
890 oinfo = sb_dqinfo(sb, type)->dqi_priv;
891 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
892 status = dquot_suspend(sb, type);
893 }
894 if (status < 0)
895 break;
896 }
897 if (status < 0)
898 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
899 "remount (error = %d).\n", status);
900 return status;
901}
902
903static int ocfs2_enable_quotas(struct ocfs2_super *osb)
904{
905 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
906 struct super_block *sb = osb->sb;
907 unsigned int feature[OCFS2_MAXQUOTAS] = {
908 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
909 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
910 unsigned int ino[OCFS2_MAXQUOTAS] = {
911 LOCAL_USER_QUOTA_SYSTEM_INODE,
912 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
913 int status;
914 int type;
915
916 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
917 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
918 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
919 continue;
920 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
921 osb->slot_num);
922 if (!inode[type]) {
923 status = -ENOENT;
924 goto out_quota_off;
925 }
926 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2,
927 DQUOT_USAGE_ENABLED);
928 if (status < 0)
929 goto out_quota_off;
930 }
931
932 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
933 iput(inode[type]);
934 return 0;
935out_quota_off:
936 ocfs2_disable_quotas(osb);
937 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
938 iput(inode[type]);
939 mlog_errno(status);
940 return status;
941}
942
943static void ocfs2_disable_quotas(struct ocfs2_super *osb)
944{
945 int type;
946 struct inode *inode;
947 struct super_block *sb = osb->sb;
948 struct ocfs2_mem_dqinfo *oinfo;
949
950 /* We mostly ignore errors in this function because there's not much
951 * we can do when we see them */
952 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
953 if (!sb_has_quota_loaded(sb, type))
954 continue;
955 if (!sb_has_quota_suspended(sb, type)) {
956 oinfo = sb_dqinfo(sb, type)->dqi_priv;
957 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
958 }
959 inode = igrab(sb->s_dquot.files[type]);
960 /* Turn off quotas. This will remove all dquot structures from
961 * memory and so they will be automatically synced to global
962 * quota files */
963 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
964 DQUOT_LIMITS_ENABLED);
965 iput(inode);
966 }
967}
968
969static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
970{
971 struct dentry *root;
972 int status, sector_size;
973 struct mount_options parsed_options;
974 struct inode *inode = NULL;
975 struct ocfs2_super *osb = NULL;
976 struct buffer_head *bh = NULL;
977 char nodestr[12];
978 struct ocfs2_blockcheck_stats stats;
979
980 trace_ocfs2_fill_super(sb, data, silent);
981
982 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
983 status = -EINVAL;
984 goto out;
985 }
986
987 /* probe for superblock */
988 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
989 if (status < 0) {
990 mlog(ML_ERROR, "superblock probe failed!\n");
991 goto out;
992 }
993
994 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
995 brelse(bh);
996 bh = NULL;
997 if (status < 0)
998 goto out;
999
1000 osb = OCFS2_SB(sb);
1001
1002 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1003 status = -EINVAL;
1004 goto out_super;
1005 }
1006 osb->s_mount_opt = parsed_options.mount_opt;
1007 osb->s_atime_quantum = parsed_options.atime_quantum;
1008 osb->preferred_slot = parsed_options.slot;
1009 osb->osb_commit_interval = parsed_options.commit_interval;
1010
1011 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1012 osb->osb_resv_level = parsed_options.resv_level;
1013 osb->osb_dir_resv_level = parsed_options.resv_level;
1014 if (parsed_options.dir_resv_level == -1)
1015 osb->osb_dir_resv_level = parsed_options.resv_level;
1016 else
1017 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1018
1019 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1020 if (status)
1021 goto out_super;
1022
1023 sb->s_magic = OCFS2_SUPER_MAGIC;
1024
1025 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1026 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1027
1028 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1029 * heartbeat=none */
1030 if (bdev_read_only(sb->s_bdev)) {
1031 if (!sb_rdonly(sb)) {
1032 status = -EACCES;
1033 mlog(ML_ERROR, "Readonly device detected but readonly "
1034 "mount was not specified.\n");
1035 goto out_super;
1036 }
1037
1038 /* You should not be able to start a local heartbeat
1039 * on a readonly device. */
1040 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1041 status = -EROFS;
1042 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1043 "device.\n");
1044 goto out_super;
1045 }
1046
1047 status = ocfs2_check_journals_nolocks(osb);
1048 if (status < 0) {
1049 if (status == -EROFS)
1050 mlog(ML_ERROR, "Recovery required on readonly "
1051 "file system, but write access is "
1052 "unavailable.\n");
1053 goto out_super;
1054 }
1055
1056 ocfs2_set_ro_flag(osb, 1);
1057
1058 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1059 "Cluster services will not be used for this mount. "
1060 "Recovery will be skipped.\n", osb->dev_str);
1061 }
1062
1063 if (!ocfs2_is_hard_readonly(osb)) {
1064 if (sb_rdonly(sb))
1065 ocfs2_set_ro_flag(osb, 0);
1066 }
1067
1068 status = ocfs2_verify_heartbeat(osb);
1069 if (status < 0)
1070 goto out_super;
1071
1072 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1073 ocfs2_debugfs_root);
1074
1075 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1076 osb, &ocfs2_osb_debug_fops);
1077
1078 if (ocfs2_meta_ecc(osb))
1079 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1080 osb->osb_debug_root);
1081
1082 status = ocfs2_mount_volume(sb);
1083 if (status < 0)
1084 goto out_debugfs;
1085
1086 if (osb->root_inode)
1087 inode = igrab(osb->root_inode);
1088
1089 if (!inode) {
1090 status = -EIO;
1091 goto out_dismount;
1092 }
1093
1094 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1095 &ocfs2_kset->kobj);
1096 if (!osb->osb_dev_kset) {
1097 status = -ENOMEM;
1098 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1099 goto out_dismount;
1100 }
1101
1102 /* Create filecheck sysfs related directories/files at
1103 * /sys/fs/ocfs2/<devname>/filecheck */
1104 if (ocfs2_filecheck_create_sysfs(osb)) {
1105 status = -ENOMEM;
1106 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1107 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1108 goto out_dismount;
1109 }
1110
1111 root = d_make_root(inode);
1112 if (!root) {
1113 status = -ENOMEM;
1114 goto out_dismount;
1115 }
1116
1117 sb->s_root = root;
1118
1119 ocfs2_complete_mount_recovery(osb);
1120
1121 if (ocfs2_mount_local(osb))
1122 snprintf(nodestr, sizeof(nodestr), "local");
1123 else
1124 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1125
1126 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1127 "with %s data mode.\n",
1128 osb->dev_str, nodestr, osb->slot_num,
1129 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1130 "ordered");
1131
1132 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1133 wake_up(&osb->osb_mount_event);
1134
1135 /* Now we can initialize quotas because we can afford to wait
1136 * for cluster locks recovery now. That also means that truncation
1137 * log recovery can happen but that waits for proper quota setup */
1138 if (!sb_rdonly(sb)) {
1139 status = ocfs2_enable_quotas(osb);
1140 if (status < 0) {
1141 /* We have to err-out specially here because
1142 * s_root is already set */
1143 mlog_errno(status);
1144 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1145 wake_up(&osb->osb_mount_event);
1146 return status;
1147 }
1148 }
1149
1150 ocfs2_complete_quota_recovery(osb);
1151
1152 /* Now we wake up again for processes waiting for quotas */
1153 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1154 wake_up(&osb->osb_mount_event);
1155
1156 /* Start this when the mount is almost sure of being successful */
1157 ocfs2_orphan_scan_start(osb);
1158
1159 return status;
1160
1161out_dismount:
1162 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1163 wake_up(&osb->osb_mount_event);
1164 ocfs2_free_replay_slots(osb);
1165 ocfs2_dismount_volume(sb, 1);
1166 goto out;
1167
1168out_debugfs:
1169 debugfs_remove_recursive(osb->osb_debug_root);
1170out_super:
1171 ocfs2_release_system_inodes(osb);
1172 kfree(osb->recovery_map);
1173 ocfs2_delete_osb(osb);
1174 kfree(osb);
1175out:
1176 mlog_errno(status);
1177
1178 return status;
1179}
1180
1181static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1182 int flags,
1183 const char *dev_name,
1184 void *data)
1185{
1186 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1187}
1188
1189static struct file_system_type ocfs2_fs_type = {
1190 .owner = THIS_MODULE,
1191 .name = "ocfs2",
1192 .mount = ocfs2_mount,
1193 .kill_sb = kill_block_super,
1194 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1195 .next = NULL
1196};
1197MODULE_ALIAS_FS("ocfs2");
1198
1199static int ocfs2_check_set_options(struct super_block *sb,
1200 struct mount_options *options)
1201{
1202 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1203 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1204 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1205 mlog(ML_ERROR, "User quotas were requested, but this "
1206 "filesystem does not have the feature enabled.\n");
1207 return 0;
1208 }
1209 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1210 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1211 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1212 mlog(ML_ERROR, "Group quotas were requested, but this "
1213 "filesystem does not have the feature enabled.\n");
1214 return 0;
1215 }
1216 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1217 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1218 mlog(ML_ERROR, "ACL support requested but extended attributes "
1219 "feature is not enabled\n");
1220 return 0;
1221 }
1222 /* No ACL setting specified? Use XATTR feature... */
1223 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1224 OCFS2_MOUNT_NO_POSIX_ACL))) {
1225 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1226 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1227 else
1228 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1229 }
1230 return 1;
1231}
1232
1233static int ocfs2_parse_options(struct super_block *sb,
1234 char *options,
1235 struct mount_options *mopt,
1236 int is_remount)
1237{
1238 int status, user_stack = 0;
1239 char *p;
1240 u32 tmp;
1241 int token, option;
1242 substring_t args[MAX_OPT_ARGS];
1243
1244 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1245
1246 mopt->commit_interval = 0;
1247 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1248 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1249 mopt->slot = OCFS2_INVALID_SLOT;
1250 mopt->localalloc_opt = -1;
1251 mopt->cluster_stack[0] = '\0';
1252 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1253 mopt->dir_resv_level = -1;
1254
1255 if (!options) {
1256 status = 1;
1257 goto bail;
1258 }
1259
1260 while ((p = strsep(&options, ",")) != NULL) {
1261 if (!*p)
1262 continue;
1263
1264 token = match_token(p, tokens, args);
1265 switch (token) {
1266 case Opt_hb_local:
1267 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1268 break;
1269 case Opt_hb_none:
1270 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1271 break;
1272 case Opt_hb_global:
1273 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1274 break;
1275 case Opt_barrier:
1276 if (match_int(&args[0], &option)) {
1277 status = 0;
1278 goto bail;
1279 }
1280 if (option)
1281 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1282 else
1283 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1284 break;
1285 case Opt_intr:
1286 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1287 break;
1288 case Opt_nointr:
1289 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1290 break;
1291 case Opt_err_panic:
1292 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1293 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1294 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1295 break;
1296 case Opt_err_ro:
1297 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1298 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1299 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1300 break;
1301 case Opt_err_cont:
1302 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1303 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1304 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1305 break;
1306 case Opt_data_ordered:
1307 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1308 break;
1309 case Opt_data_writeback:
1310 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1311 break;
1312 case Opt_user_xattr:
1313 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1314 break;
1315 case Opt_nouser_xattr:
1316 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1317 break;
1318 case Opt_atime_quantum:
1319 if (match_int(&args[0], &option)) {
1320 status = 0;
1321 goto bail;
1322 }
1323 if (option >= 0)
1324 mopt->atime_quantum = option;
1325 break;
1326 case Opt_slot:
1327 if (match_int(&args[0], &option)) {
1328 status = 0;
1329 goto bail;
1330 }
1331 if (option)
1332 mopt->slot = (u16)option;
1333 break;
1334 case Opt_commit:
1335 if (match_int(&args[0], &option)) {
1336 status = 0;
1337 goto bail;
1338 }
1339 if (option < 0)
1340 return 0;
1341 if (option == 0)
1342 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1343 mopt->commit_interval = HZ * option;
1344 break;
1345 case Opt_localalloc:
1346 if (match_int(&args[0], &option)) {
1347 status = 0;
1348 goto bail;
1349 }
1350 if (option >= 0)
1351 mopt->localalloc_opt = option;
1352 break;
1353 case Opt_localflocks:
1354 /*
1355 * Changing this during remount could race
1356 * flock() requests, or "unbalance" existing
1357 * ones (e.g., a lock is taken in one mode but
1358 * dropped in the other). If users care enough
1359 * to flip locking modes during remount, we
1360 * could add a "local" flag to individual
1361 * flock structures for proper tracking of
1362 * state.
1363 */
1364 if (!is_remount)
1365 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1366 break;
1367 case Opt_stack:
1368 /* Check both that the option we were passed
1369 * is of the right length and that it is a proper
1370 * string of the right length.
1371 */
1372 if (((args[0].to - args[0].from) !=
1373 OCFS2_STACK_LABEL_LEN) ||
1374 (strnlen(args[0].from,
1375 OCFS2_STACK_LABEL_LEN) !=
1376 OCFS2_STACK_LABEL_LEN)) {
1377 mlog(ML_ERROR,
1378 "Invalid cluster_stack option\n");
1379 status = 0;
1380 goto bail;
1381 }
1382 memcpy(mopt->cluster_stack, args[0].from,
1383 OCFS2_STACK_LABEL_LEN);
1384 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1385 /*
1386 * Open code the memcmp here as we don't have
1387 * an osb to pass to
1388 * ocfs2_userspace_stack().
1389 */
1390 if (memcmp(mopt->cluster_stack,
1391 OCFS2_CLASSIC_CLUSTER_STACK,
1392 OCFS2_STACK_LABEL_LEN))
1393 user_stack = 1;
1394 break;
1395 case Opt_inode64:
1396 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1397 break;
1398 case Opt_usrquota:
1399 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1400 break;
1401 case Opt_grpquota:
1402 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1403 break;
1404 case Opt_coherency_buffered:
1405 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1406 break;
1407 case Opt_coherency_full:
1408 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1409 break;
1410 case Opt_acl:
1411 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1412 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1413 break;
1414 case Opt_noacl:
1415 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1416 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1417 break;
1418 case Opt_resv_level:
1419 if (is_remount)
1420 break;
1421 if (match_int(&args[0], &option)) {
1422 status = 0;
1423 goto bail;
1424 }
1425 if (option >= OCFS2_MIN_RESV_LEVEL &&
1426 option < OCFS2_MAX_RESV_LEVEL)
1427 mopt->resv_level = option;
1428 break;
1429 case Opt_dir_resv_level:
1430 if (is_remount)
1431 break;
1432 if (match_int(&args[0], &option)) {
1433 status = 0;
1434 goto bail;
1435 }
1436 if (option >= OCFS2_MIN_RESV_LEVEL &&
1437 option < OCFS2_MAX_RESV_LEVEL)
1438 mopt->dir_resv_level = option;
1439 break;
1440 case Opt_journal_async_commit:
1441 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1442 break;
1443 default:
1444 mlog(ML_ERROR,
1445 "Unrecognized mount option \"%s\" "
1446 "or missing value\n", p);
1447 status = 0;
1448 goto bail;
1449 }
1450 }
1451
1452 if (user_stack == 0) {
1453 /* Ensure only one heartbeat mode */
1454 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1455 OCFS2_MOUNT_HB_GLOBAL |
1456 OCFS2_MOUNT_HB_NONE);
1457 if (hweight32(tmp) != 1) {
1458 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1459 status = 0;
1460 goto bail;
1461 }
1462 }
1463
1464 status = 1;
1465
1466bail:
1467 return status;
1468}
1469
1470static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1471{
1472 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1473 unsigned long opts = osb->s_mount_opt;
1474 unsigned int local_alloc_megs;
1475
1476 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1477 seq_printf(s, ",_netdev");
1478 if (opts & OCFS2_MOUNT_HB_LOCAL)
1479 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1480 else
1481 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1482 } else
1483 seq_printf(s, ",%s", OCFS2_HB_NONE);
1484
1485 if (opts & OCFS2_MOUNT_NOINTR)
1486 seq_printf(s, ",nointr");
1487
1488 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1489 seq_printf(s, ",data=writeback");
1490 else
1491 seq_printf(s, ",data=ordered");
1492
1493 if (opts & OCFS2_MOUNT_BARRIER)
1494 seq_printf(s, ",barrier=1");
1495
1496 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1497 seq_printf(s, ",errors=panic");
1498 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1499 seq_printf(s, ",errors=continue");
1500 else
1501 seq_printf(s, ",errors=remount-ro");
1502
1503 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1504 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1505
1506 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1507
1508 if (osb->osb_commit_interval)
1509 seq_printf(s, ",commit=%u",
1510 (unsigned) (osb->osb_commit_interval / HZ));
1511
1512 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1513 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1514 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1515
1516 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1517 seq_printf(s, ",localflocks,");
1518
1519 if (osb->osb_cluster_stack[0])
1520 seq_show_option(s, "cluster_stack", osb->osb_cluster_stack);
1521 if (opts & OCFS2_MOUNT_USRQUOTA)
1522 seq_printf(s, ",usrquota");
1523 if (opts & OCFS2_MOUNT_GRPQUOTA)
1524 seq_printf(s, ",grpquota");
1525
1526 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1527 seq_printf(s, ",coherency=buffered");
1528 else
1529 seq_printf(s, ",coherency=full");
1530
1531 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1532 seq_printf(s, ",nouser_xattr");
1533 else
1534 seq_printf(s, ",user_xattr");
1535
1536 if (opts & OCFS2_MOUNT_INODE64)
1537 seq_printf(s, ",inode64");
1538
1539 if (opts & OCFS2_MOUNT_POSIX_ACL)
1540 seq_printf(s, ",acl");
1541 else
1542 seq_printf(s, ",noacl");
1543
1544 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1545 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1546
1547 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1548 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1549
1550 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1551 seq_printf(s, ",journal_async_commit");
1552
1553 return 0;
1554}
1555
1556static int __init ocfs2_init(void)
1557{
1558 int status;
1559
1560 status = init_ocfs2_uptodate_cache();
1561 if (status < 0)
1562 goto out1;
1563
1564 status = ocfs2_initialize_mem_caches();
1565 if (status < 0)
1566 goto out2;
1567
1568 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1569
1570 ocfs2_set_locking_protocol();
1571
1572 status = register_quota_format(&ocfs2_quota_format);
1573 if (status < 0)
1574 goto out3;
1575 status = register_filesystem(&ocfs2_fs_type);
1576 if (!status)
1577 return 0;
1578
1579 unregister_quota_format(&ocfs2_quota_format);
1580out3:
1581 debugfs_remove(ocfs2_debugfs_root);
1582 ocfs2_free_mem_caches();
1583out2:
1584 exit_ocfs2_uptodate_cache();
1585out1:
1586 mlog_errno(status);
1587 return status;
1588}
1589
1590static void __exit ocfs2_exit(void)
1591{
1592 unregister_quota_format(&ocfs2_quota_format);
1593
1594 debugfs_remove(ocfs2_debugfs_root);
1595
1596 ocfs2_free_mem_caches();
1597
1598 unregister_filesystem(&ocfs2_fs_type);
1599
1600 exit_ocfs2_uptodate_cache();
1601}
1602
1603static void ocfs2_put_super(struct super_block *sb)
1604{
1605 trace_ocfs2_put_super(sb);
1606
1607 ocfs2_sync_blockdev(sb);
1608 ocfs2_dismount_volume(sb, 0);
1609}
1610
1611static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1612{
1613 struct ocfs2_super *osb;
1614 u32 numbits, freebits;
1615 int status;
1616 struct ocfs2_dinode *bm_lock;
1617 struct buffer_head *bh = NULL;
1618 struct inode *inode = NULL;
1619
1620 trace_ocfs2_statfs(dentry->d_sb, buf);
1621
1622 osb = OCFS2_SB(dentry->d_sb);
1623
1624 inode = ocfs2_get_system_file_inode(osb,
1625 GLOBAL_BITMAP_SYSTEM_INODE,
1626 OCFS2_INVALID_SLOT);
1627 if (!inode) {
1628 mlog(ML_ERROR, "failed to get bitmap inode\n");
1629 status = -EIO;
1630 goto bail;
1631 }
1632
1633 status = ocfs2_inode_lock(inode, &bh, 0);
1634 if (status < 0) {
1635 mlog_errno(status);
1636 goto bail;
1637 }
1638
1639 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1640
1641 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1642 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1643
1644 buf->f_type = OCFS2_SUPER_MAGIC;
1645 buf->f_bsize = dentry->d_sb->s_blocksize;
1646 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1647 buf->f_blocks = ((sector_t) numbits) *
1648 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1649 buf->f_bfree = ((sector_t) freebits) *
1650 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1651 buf->f_bavail = buf->f_bfree;
1652 buf->f_files = numbits;
1653 buf->f_ffree = freebits;
1654 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1655 & 0xFFFFFFFFUL;
1656 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1657 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1658
1659 brelse(bh);
1660
1661 ocfs2_inode_unlock(inode, 0);
1662 status = 0;
1663bail:
1664 iput(inode);
1665
1666 if (status)
1667 mlog_errno(status);
1668
1669 return status;
1670}
1671
1672static void ocfs2_inode_init_once(void *data)
1673{
1674 struct ocfs2_inode_info *oi = data;
1675
1676 oi->ip_flags = 0;
1677 oi->ip_open_count = 0;
1678 spin_lock_init(&oi->ip_lock);
1679 ocfs2_extent_map_init(&oi->vfs_inode);
1680 INIT_LIST_HEAD(&oi->ip_io_markers);
1681 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1682 oi->ip_dir_start_lookup = 0;
1683 init_rwsem(&oi->ip_alloc_sem);
1684 init_rwsem(&oi->ip_xattr_sem);
1685 mutex_init(&oi->ip_io_mutex);
1686
1687 oi->ip_blkno = 0ULL;
1688 oi->ip_clusters = 0;
1689 oi->ip_next_orphan = NULL;
1690
1691 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1692
1693 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1694 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1695 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1696
1697 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1698 &ocfs2_inode_caching_ops);
1699
1700 inode_init_once(&oi->vfs_inode);
1701}
1702
1703static int ocfs2_initialize_mem_caches(void)
1704{
1705 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1706 sizeof(struct ocfs2_inode_info),
1707 0,
1708 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1709 SLAB_ACCOUNT),
1710 ocfs2_inode_init_once);
1711 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1712 sizeof(struct ocfs2_dquot),
1713 0,
1714 SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
1715 NULL);
1716 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1717 sizeof(struct ocfs2_quota_chunk),
1718 0,
1719 SLAB_RECLAIM_ACCOUNT,
1720 NULL);
1721 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1722 !ocfs2_qf_chunk_cachep) {
1723 kmem_cache_destroy(ocfs2_inode_cachep);
1724 kmem_cache_destroy(ocfs2_dquot_cachep);
1725 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1726 return -ENOMEM;
1727 }
1728
1729 return 0;
1730}
1731
1732static void ocfs2_free_mem_caches(void)
1733{
1734 /*
1735 * Make sure all delayed rcu free inodes are flushed before we
1736 * destroy cache.
1737 */
1738 rcu_barrier();
1739 kmem_cache_destroy(ocfs2_inode_cachep);
1740 ocfs2_inode_cachep = NULL;
1741
1742 kmem_cache_destroy(ocfs2_dquot_cachep);
1743 ocfs2_dquot_cachep = NULL;
1744
1745 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1746 ocfs2_qf_chunk_cachep = NULL;
1747}
1748
1749static int ocfs2_get_sector(struct super_block *sb,
1750 struct buffer_head **bh,
1751 int block,
1752 int sect_size)
1753{
1754 if (!sb_set_blocksize(sb, sect_size)) {
1755 mlog(ML_ERROR, "unable to set blocksize\n");
1756 return -EIO;
1757 }
1758
1759 *bh = sb_getblk(sb, block);
1760 if (!*bh) {
1761 mlog_errno(-ENOMEM);
1762 return -ENOMEM;
1763 }
1764 lock_buffer(*bh);
1765 if (!buffer_dirty(*bh))
1766 clear_buffer_uptodate(*bh);
1767 unlock_buffer(*bh);
1768 if (bh_read(*bh, 0) < 0) {
1769 mlog_errno(-EIO);
1770 brelse(*bh);
1771 *bh = NULL;
1772 return -EIO;
1773 }
1774
1775 return 0;
1776}
1777
1778static int ocfs2_mount_volume(struct super_block *sb)
1779{
1780 int status = 0;
1781 struct ocfs2_super *osb = OCFS2_SB(sb);
1782
1783 if (ocfs2_is_hard_readonly(osb))
1784 goto out;
1785
1786 mutex_init(&osb->obs_trim_fs_mutex);
1787
1788 status = ocfs2_dlm_init(osb);
1789 if (status < 0) {
1790 mlog_errno(status);
1791 if (status == -EBADR && ocfs2_userspace_stack(osb))
1792 mlog(ML_ERROR, "couldn't mount because cluster name on"
1793 " disk does not match the running cluster name.\n");
1794 goto out;
1795 }
1796
1797 status = ocfs2_super_lock(osb, 1);
1798 if (status < 0) {
1799 mlog_errno(status);
1800 goto out_dlm;
1801 }
1802
1803 /* This will load up the node map and add ourselves to it. */
1804 status = ocfs2_find_slot(osb);
1805 if (status < 0) {
1806 mlog_errno(status);
1807 goto out_super_lock;
1808 }
1809
1810 /* load all node-local system inodes */
1811 status = ocfs2_init_local_system_inodes(osb);
1812 if (status < 0) {
1813 mlog_errno(status);
1814 goto out_super_lock;
1815 }
1816
1817 status = ocfs2_check_volume(osb);
1818 if (status < 0) {
1819 mlog_errno(status);
1820 goto out_system_inodes;
1821 }
1822
1823 status = ocfs2_truncate_log_init(osb);
1824 if (status < 0) {
1825 mlog_errno(status);
1826 goto out_check_volume;
1827 }
1828
1829 ocfs2_super_unlock(osb, 1);
1830 return 0;
1831
1832out_check_volume:
1833 ocfs2_free_replay_slots(osb);
1834out_system_inodes:
1835 if (osb->local_alloc_state == OCFS2_LA_ENABLED)
1836 ocfs2_shutdown_local_alloc(osb);
1837 ocfs2_release_system_inodes(osb);
1838 /* before journal shutdown, we should release slot_info */
1839 ocfs2_free_slot_info(osb);
1840 ocfs2_journal_shutdown(osb);
1841out_super_lock:
1842 ocfs2_super_unlock(osb, 1);
1843out_dlm:
1844 ocfs2_dlm_shutdown(osb, 0);
1845out:
1846 return status;
1847}
1848
1849static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1850{
1851 int tmp, hangup_needed = 0;
1852 struct ocfs2_super *osb = NULL;
1853 char nodestr[12];
1854
1855 trace_ocfs2_dismount_volume(sb);
1856
1857 BUG_ON(!sb);
1858 osb = OCFS2_SB(sb);
1859 BUG_ON(!osb);
1860
1861 /* Remove file check sysfs related directores/files,
1862 * and wait for the pending file check operations */
1863 ocfs2_filecheck_remove_sysfs(osb);
1864
1865 kset_unregister(osb->osb_dev_kset);
1866
1867 /* Orphan scan should be stopped as early as possible */
1868 ocfs2_orphan_scan_stop(osb);
1869
1870 ocfs2_disable_quotas(osb);
1871
1872 /* All dquots should be freed by now */
1873 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1874 /* Wait for worker to be done with the work structure in osb */
1875 cancel_work_sync(&osb->dquot_drop_work);
1876
1877 ocfs2_shutdown_local_alloc(osb);
1878
1879 ocfs2_truncate_log_shutdown(osb);
1880
1881 /* This will disable recovery and flush any recovery work. */
1882 ocfs2_recovery_exit(osb);
1883
1884 ocfs2_sync_blockdev(sb);
1885
1886 ocfs2_purge_refcount_trees(osb);
1887
1888 /* No cluster connection means we've failed during mount, so skip
1889 * all the steps which depended on that to complete. */
1890 if (osb->cconn) {
1891 tmp = ocfs2_super_lock(osb, 1);
1892 if (tmp < 0) {
1893 mlog_errno(tmp);
1894 return;
1895 }
1896 }
1897
1898 if (osb->slot_num != OCFS2_INVALID_SLOT)
1899 ocfs2_put_slot(osb);
1900
1901 if (osb->cconn)
1902 ocfs2_super_unlock(osb, 1);
1903
1904 ocfs2_release_system_inodes(osb);
1905
1906 ocfs2_journal_shutdown(osb);
1907
1908 /*
1909 * If we're dismounting due to mount error, mount.ocfs2 will clean
1910 * up heartbeat. If we're a local mount, there is no heartbeat.
1911 * If we failed before we got a uuid_str yet, we can't stop
1912 * heartbeat. Otherwise, do it.
1913 */
1914 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1915 !ocfs2_is_hard_readonly(osb))
1916 hangup_needed = 1;
1917
1918 ocfs2_dlm_shutdown(osb, hangup_needed);
1919
1920 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1921 debugfs_remove_recursive(osb->osb_debug_root);
1922
1923 if (hangup_needed)
1924 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1925
1926 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1927
1928 if (ocfs2_mount_local(osb))
1929 snprintf(nodestr, sizeof(nodestr), "local");
1930 else
1931 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1932
1933 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1934 osb->dev_str, nodestr);
1935
1936 ocfs2_delete_osb(osb);
1937 kfree(osb);
1938 sb->s_dev = 0;
1939 sb->s_fs_info = NULL;
1940}
1941
1942static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1943 unsigned uuid_bytes)
1944{
1945 int i, ret;
1946 char *ptr;
1947
1948 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1949
1950 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1951 if (osb->uuid_str == NULL)
1952 return -ENOMEM;
1953
1954 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1955 /* print with null */
1956 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1957 if (ret != 2) /* drop super cleans up */
1958 return -EINVAL;
1959 /* then only advance past the last char */
1960 ptr += 2;
1961 }
1962
1963 return 0;
1964}
1965
1966/* Make sure entire volume is addressable by our journal. Requires
1967 osb_clusters_at_boot to be valid and for the journal to have been
1968 initialized by ocfs2_journal_init(). */
1969static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1970{
1971 int status = 0;
1972 u64 max_block =
1973 ocfs2_clusters_to_blocks(osb->sb,
1974 osb->osb_clusters_at_boot) - 1;
1975
1976 /* 32-bit block number is always OK. */
1977 if (max_block <= (u32)~0ULL)
1978 goto out;
1979
1980 /* Volume is "huge", so see if our journal is new enough to
1981 support it. */
1982 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1983 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1984 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1985 JBD2_FEATURE_INCOMPAT_64BIT))) {
1986 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1987 "Enable the 'block64' journal option with tunefs.ocfs2");
1988 status = -EFBIG;
1989 goto out;
1990 }
1991
1992 out:
1993 return status;
1994}
1995
1996static int ocfs2_initialize_super(struct super_block *sb,
1997 struct buffer_head *bh,
1998 int sector_size,
1999 struct ocfs2_blockcheck_stats *stats)
2000{
2001 int status;
2002 int i, cbits, bbits;
2003 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2004 struct inode *inode = NULL;
2005 struct ocfs2_super *osb;
2006 u64 total_blocks;
2007
2008 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2009 if (!osb) {
2010 status = -ENOMEM;
2011 mlog_errno(status);
2012 goto out;
2013 }
2014
2015 sb->s_fs_info = osb;
2016 sb->s_op = &ocfs2_sops;
2017 sb->s_d_op = &ocfs2_dentry_ops;
2018 sb->s_export_op = &ocfs2_export_ops;
2019 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2020 sb->dq_op = &ocfs2_quota_operations;
2021 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2022 sb->s_xattr = ocfs2_xattr_handlers;
2023 sb->s_time_gran = 1;
2024 sb->s_flags |= SB_NOATIME;
2025 /* this is needed to support O_LARGEFILE */
2026 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2027 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2028 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2029 super_set_uuid(sb, di->id2.i_super.s_uuid,
2030 sizeof(di->id2.i_super.s_uuid));
2031
2032 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2033
2034 for (i = 0; i < 3; i++)
2035 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2036 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2037
2038 osb->sb = sb;
2039 osb->s_sectsize_bits = blksize_bits(sector_size);
2040 BUG_ON(!osb->s_sectsize_bits);
2041
2042 spin_lock_init(&osb->dc_task_lock);
2043 init_waitqueue_head(&osb->dc_event);
2044 osb->dc_work_sequence = 0;
2045 osb->dc_wake_sequence = 0;
2046 INIT_LIST_HEAD(&osb->blocked_lock_list);
2047 osb->blocked_lock_count = 0;
2048 spin_lock_init(&osb->osb_lock);
2049 spin_lock_init(&osb->osb_xattr_lock);
2050 ocfs2_init_steal_slots(osb);
2051
2052 mutex_init(&osb->system_file_mutex);
2053
2054 atomic_set(&osb->alloc_stats.moves, 0);
2055 atomic_set(&osb->alloc_stats.local_data, 0);
2056 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2057 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2058 atomic_set(&osb->alloc_stats.bg_extends, 0);
2059
2060 /* Copy the blockcheck stats from the superblock probe */
2061 osb->osb_ecc_stats = *stats;
2062
2063 ocfs2_init_node_maps(osb);
2064
2065 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2066 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2067
2068 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2069 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2070 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2071 osb->max_slots);
2072 status = -EINVAL;
2073 goto out;
2074 }
2075
2076 ocfs2_orphan_scan_init(osb);
2077
2078 status = ocfs2_recovery_init(osb);
2079 if (status) {
2080 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2081 mlog_errno(status);
2082 goto out;
2083 }
2084
2085 init_waitqueue_head(&osb->checkpoint_event);
2086
2087 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2088
2089 osb->slot_num = OCFS2_INVALID_SLOT;
2090
2091 osb->s_xattr_inline_size = le16_to_cpu(
2092 di->id2.i_super.s_xattr_inline_size);
2093
2094 osb->local_alloc_state = OCFS2_LA_UNUSED;
2095 osb->local_alloc_bh = NULL;
2096 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2097
2098 init_waitqueue_head(&osb->osb_mount_event);
2099
2100 ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2101
2102 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2103 if (!osb->vol_label) {
2104 mlog(ML_ERROR, "unable to alloc vol label\n");
2105 status = -ENOMEM;
2106 goto out_recovery_map;
2107 }
2108
2109 osb->slot_recovery_generations =
2110 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2111 GFP_KERNEL);
2112 if (!osb->slot_recovery_generations) {
2113 status = -ENOMEM;
2114 mlog_errno(status);
2115 goto out_vol_label;
2116 }
2117
2118 init_waitqueue_head(&osb->osb_wipe_event);
2119 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2120 sizeof(*osb->osb_orphan_wipes),
2121 GFP_KERNEL);
2122 if (!osb->osb_orphan_wipes) {
2123 status = -ENOMEM;
2124 mlog_errno(status);
2125 goto out_slot_recovery_gen;
2126 }
2127
2128 osb->osb_rf_lock_tree = RB_ROOT;
2129
2130 osb->s_feature_compat =
2131 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2132 osb->s_feature_ro_compat =
2133 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2134 osb->s_feature_incompat =
2135 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2136
2137 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2138 mlog(ML_ERROR, "couldn't mount because of unsupported "
2139 "optional features (%x).\n", i);
2140 status = -EINVAL;
2141 goto out_orphan_wipes;
2142 }
2143 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2144 mlog(ML_ERROR, "couldn't mount RDWR because of "
2145 "unsupported optional features (%x).\n", i);
2146 status = -EINVAL;
2147 goto out_orphan_wipes;
2148 }
2149
2150 if (ocfs2_clusterinfo_valid(osb)) {
2151 /*
2152 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null
2153 * terminated, so make sure no overflow happens here by using
2154 * memcpy. Destination strings will always be null terminated
2155 * because osb is allocated using kzalloc.
2156 */
2157 osb->osb_stackflags =
2158 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2159 memcpy(osb->osb_cluster_stack,
2160 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2161 OCFS2_STACK_LABEL_LEN);
2162 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2163 mlog(ML_ERROR,
2164 "couldn't mount because of an invalid "
2165 "cluster stack label (%s) \n",
2166 osb->osb_cluster_stack);
2167 status = -EINVAL;
2168 goto out_orphan_wipes;
2169 }
2170 memcpy(osb->osb_cluster_name,
2171 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2172 OCFS2_CLUSTER_NAME_LEN);
2173 } else {
2174 /* The empty string is identical with classic tools that
2175 * don't know about s_cluster_info. */
2176 osb->osb_cluster_stack[0] = '\0';
2177 }
2178
2179 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2180
2181 /*
2182 * FIXME
2183 * This should be done in ocfs2_journal_init(), but any inode
2184 * writes back operation will cause the filesystem to crash.
2185 */
2186 status = ocfs2_journal_alloc(osb);
2187 if (status < 0)
2188 goto out_orphan_wipes;
2189
2190 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2191 init_llist_head(&osb->dquot_drop_list);
2192
2193 /* get some pseudo constants for clustersize bits */
2194 osb->s_clustersize_bits =
2195 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2196 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2197
2198 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2199 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2200 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2201 osb->s_clustersize);
2202 status = -EINVAL;
2203 goto out_journal;
2204 }
2205
2206 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2207 le32_to_cpu(di->i_clusters));
2208
2209 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2210 total_blocks);
2211 if (status) {
2212 mlog(ML_ERROR, "Volume too large "
2213 "to mount safely on this system");
2214 status = -EFBIG;
2215 goto out_journal;
2216 }
2217
2218 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2219 sizeof(di->id2.i_super.s_uuid))) {
2220 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2221 status = -ENOMEM;
2222 goto out_journal;
2223 }
2224
2225 strscpy(osb->vol_label, di->id2.i_super.s_label,
2226 OCFS2_MAX_VOL_LABEL_LEN);
2227 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2228 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2229 osb->first_cluster_group_blkno =
2230 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2231 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2232 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2233 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2234 (unsigned long long)osb->root_blkno,
2235 (unsigned long long)osb->system_dir_blkno,
2236 osb->s_clustersize_bits);
2237
2238 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2239 if (!osb->osb_dlm_debug) {
2240 status = -ENOMEM;
2241 mlog_errno(status);
2242 goto out_uuid_str;
2243 }
2244
2245 atomic_set(&osb->vol_state, VOLUME_INIT);
2246
2247 /* load root, system_dir, and all global system inodes */
2248 status = ocfs2_init_global_system_inodes(osb);
2249 if (status < 0) {
2250 mlog_errno(status);
2251 goto out_dlm_out;
2252 }
2253
2254 /*
2255 * global bitmap
2256 */
2257 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2258 OCFS2_INVALID_SLOT);
2259 if (!inode) {
2260 status = -EINVAL;
2261 mlog_errno(status);
2262 goto out_system_inodes;
2263 }
2264
2265 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2266 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2267 iput(inode);
2268
2269 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2270 osb->s_feature_incompat) * 8;
2271
2272 status = ocfs2_init_slot_info(osb);
2273 if (status < 0) {
2274 mlog_errno(status);
2275 goto out_system_inodes;
2276 }
2277
2278 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2279 if (!osb->ocfs2_wq) {
2280 status = -ENOMEM;
2281 mlog_errno(status);
2282 goto out_slot_info;
2283 }
2284
2285 return status;
2286
2287out_slot_info:
2288 ocfs2_free_slot_info(osb);
2289out_system_inodes:
2290 ocfs2_release_system_inodes(osb);
2291out_dlm_out:
2292 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2293out_uuid_str:
2294 kfree(osb->uuid_str);
2295out_journal:
2296 kfree(osb->journal);
2297out_orphan_wipes:
2298 kfree(osb->osb_orphan_wipes);
2299out_slot_recovery_gen:
2300 kfree(osb->slot_recovery_generations);
2301out_vol_label:
2302 kfree(osb->vol_label);
2303out_recovery_map:
2304 kfree(osb->recovery_map);
2305out:
2306 kfree(osb);
2307 sb->s_fs_info = NULL;
2308 return status;
2309}
2310
2311/*
2312 * will return: -EAGAIN if it is ok to keep searching for superblocks
2313 * -EINVAL if there is a bad superblock
2314 * 0 on success
2315 */
2316static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2317 struct buffer_head *bh,
2318 u32 blksz,
2319 struct ocfs2_blockcheck_stats *stats)
2320{
2321 int status = -EAGAIN;
2322
2323 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2324 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2325 /* We have to do a raw check of the feature here */
2326 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2327 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2328 status = ocfs2_block_check_validate(bh->b_data,
2329 bh->b_size,
2330 &di->i_check,
2331 stats);
2332 if (status)
2333 goto out;
2334 }
2335 status = -EINVAL;
2336 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2337 mlog(ML_ERROR, "found superblock with incorrect block "
2338 "size: found %u, should be %u\n",
2339 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2340 blksz);
2341 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2342 OCFS2_MAJOR_REV_LEVEL ||
2343 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2344 OCFS2_MINOR_REV_LEVEL) {
2345 mlog(ML_ERROR, "found superblock with bad version: "
2346 "found %u.%u, should be %u.%u\n",
2347 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2348 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2349 OCFS2_MAJOR_REV_LEVEL,
2350 OCFS2_MINOR_REV_LEVEL);
2351 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2352 mlog(ML_ERROR, "bad block number on superblock: "
2353 "found %llu, should be %llu\n",
2354 (unsigned long long)le64_to_cpu(di->i_blkno),
2355 (unsigned long long)bh->b_blocknr);
2356 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2357 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2358 mlog(ML_ERROR, "bad cluster size found: %u\n",
2359 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2360 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2361 mlog(ML_ERROR, "bad root_blkno: 0\n");
2362 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2363 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2364 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2365 mlog(ML_ERROR,
2366 "Superblock slots found greater than file system "
2367 "maximum: found %u, max %u\n",
2368 le16_to_cpu(di->id2.i_super.s_max_slots),
2369 OCFS2_MAX_SLOTS);
2370 } else {
2371 /* found it! */
2372 status = 0;
2373 }
2374 }
2375
2376out:
2377 if (status && status != -EAGAIN)
2378 mlog_errno(status);
2379 return status;
2380}
2381
2382static int ocfs2_check_volume(struct ocfs2_super *osb)
2383{
2384 int status;
2385 int dirty;
2386 int local;
2387 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2388 * recover
2389 * ourselves. */
2390
2391 /* Init our journal object. */
2392 status = ocfs2_journal_init(osb, &dirty);
2393 if (status < 0) {
2394 mlog(ML_ERROR, "Could not initialize journal!\n");
2395 goto finally;
2396 }
2397
2398 /* Now that journal has been initialized, check to make sure
2399 entire volume is addressable. */
2400 status = ocfs2_journal_addressable(osb);
2401 if (status)
2402 goto finally;
2403
2404 /* If the journal was unmounted cleanly then we don't want to
2405 * recover anything. Otherwise, journal_load will do that
2406 * dirty work for us :) */
2407 if (!dirty) {
2408 status = ocfs2_journal_wipe(osb->journal, 0);
2409 if (status < 0) {
2410 mlog_errno(status);
2411 goto finally;
2412 }
2413 } else {
2414 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2415 "unmounted cleanly, recovering it.\n", osb->dev_str);
2416 }
2417
2418 local = ocfs2_mount_local(osb);
2419
2420 /* will play back anything left in the journal. */
2421 status = ocfs2_journal_load(osb->journal, local, dirty);
2422 if (status < 0) {
2423 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2424 goto finally;
2425 }
2426
2427 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2428 jbd2_journal_set_features(osb->journal->j_journal,
2429 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2430 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2431 else
2432 jbd2_journal_clear_features(osb->journal->j_journal,
2433 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2434 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2435
2436 if (dirty) {
2437 /* recover my local alloc if we didn't unmount cleanly. */
2438 status = ocfs2_begin_local_alloc_recovery(osb,
2439 osb->slot_num,
2440 &local_alloc);
2441 if (status < 0) {
2442 mlog_errno(status);
2443 goto finally;
2444 }
2445 /* we complete the recovery process after we've marked
2446 * ourselves as mounted. */
2447 }
2448
2449 status = ocfs2_load_local_alloc(osb);
2450 if (status < 0) {
2451 mlog_errno(status);
2452 goto finally;
2453 }
2454
2455 if (dirty) {
2456 /* Recovery will be completed after we've mounted the
2457 * rest of the volume. */
2458 osb->local_alloc_copy = local_alloc;
2459 local_alloc = NULL;
2460 }
2461
2462 /* go through each journal, trylock it and if you get the
2463 * lock, and it's marked as dirty, set the bit in the recover
2464 * map and launch a recovery thread for it. */
2465 status = ocfs2_mark_dead_nodes(osb);
2466 if (status < 0) {
2467 mlog_errno(status);
2468 goto finally;
2469 }
2470
2471 status = ocfs2_compute_replay_slots(osb);
2472 if (status < 0)
2473 mlog_errno(status);
2474
2475finally:
2476 kfree(local_alloc);
2477
2478 if (status)
2479 mlog_errno(status);
2480 return status;
2481}
2482
2483/*
2484 * The routine gets called from dismount or close whenever a dismount on
2485 * volume is requested and the osb open count becomes 1.
2486 * It will remove the osb from the global list and also free up all the
2487 * initialized resources and fileobject.
2488 */
2489static void ocfs2_delete_osb(struct ocfs2_super *osb)
2490{
2491 /* This function assumes that the caller has the main osb resource */
2492
2493 /* ocfs2_initializer_super have already created this workqueue */
2494 if (osb->ocfs2_wq)
2495 destroy_workqueue(osb->ocfs2_wq);
2496
2497 ocfs2_free_slot_info(osb);
2498
2499 kfree(osb->osb_orphan_wipes);
2500 kfree(osb->slot_recovery_generations);
2501 /* FIXME
2502 * This belongs in journal shutdown, but because we have to
2503 * allocate osb->journal at the middle of ocfs2_initialize_super(),
2504 * we free it here.
2505 */
2506 kfree(osb->journal);
2507 kfree(osb->local_alloc_copy);
2508 kfree(osb->uuid_str);
2509 kfree(osb->vol_label);
2510 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2511 memset(osb, 0, sizeof(struct ocfs2_super));
2512}
2513
2514/* Depending on the mount option passed, perform one of the following:
2515 * Put OCFS2 into a readonly state (default)
2516 * Return EIO so that only the process errs
2517 * Fix the error as if fsck.ocfs2 -y
2518 * panic
2519 */
2520static int ocfs2_handle_error(struct super_block *sb)
2521{
2522 struct ocfs2_super *osb = OCFS2_SB(sb);
2523 int rv = 0;
2524
2525 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2526 pr_crit("On-disk corruption discovered. "
2527 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2528
2529 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2530 panic("OCFS2: (device %s): panic forced after error\n",
2531 sb->s_id);
2532 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2533 pr_crit("OCFS2: Returning error to the calling process.\n");
2534 rv = -EIO;
2535 } else { /* default option */
2536 rv = -EROFS;
2537 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2538 return rv;
2539
2540 pr_crit("OCFS2: File system is now read-only.\n");
2541 sb->s_flags |= SB_RDONLY;
2542 ocfs2_set_ro_flag(osb, 0);
2543 }
2544
2545 return rv;
2546}
2547
2548int __ocfs2_error(struct super_block *sb, const char *function,
2549 const char *fmt, ...)
2550{
2551 struct va_format vaf;
2552 va_list args;
2553
2554 va_start(args, fmt);
2555 vaf.fmt = fmt;
2556 vaf.va = &args;
2557
2558 /* Not using mlog here because we want to show the actual
2559 * function the error came from. */
2560 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2561 sb->s_id, function, &vaf);
2562
2563 va_end(args);
2564
2565 return ocfs2_handle_error(sb);
2566}
2567
2568/* Handle critical errors. This is intentionally more drastic than
2569 * ocfs2_handle_error, so we only use for things like journal errors,
2570 * etc. */
2571void __ocfs2_abort(struct super_block *sb, const char *function,
2572 const char *fmt, ...)
2573{
2574 struct va_format vaf;
2575 va_list args;
2576
2577 va_start(args, fmt);
2578
2579 vaf.fmt = fmt;
2580 vaf.va = &args;
2581
2582 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2583 sb->s_id, function, &vaf);
2584
2585 va_end(args);
2586
2587 /* We don't have the cluster support yet to go straight to
2588 * hard readonly in here. Until then, we want to keep
2589 * ocfs2_abort() so that we can at least mark critical
2590 * errors.
2591 *
2592 * TODO: This should abort the journal and alert other nodes
2593 * that our slot needs recovery. */
2594
2595 /* Force a panic(). This stinks, but it's better than letting
2596 * things continue without having a proper hard readonly
2597 * here. */
2598 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2599 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2600 ocfs2_handle_error(sb);
2601}
2602
2603/*
2604 * Void signal blockers, because in-kernel sigprocmask() only fails
2605 * when SIG_* is wrong.
2606 */
2607void ocfs2_block_signals(sigset_t *oldset)
2608{
2609 int rc;
2610 sigset_t blocked;
2611
2612 sigfillset(&blocked);
2613 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2614 BUG_ON(rc);
2615}
2616
2617void ocfs2_unblock_signals(sigset_t *oldset)
2618{
2619 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2620 BUG_ON(rc);
2621}
2622
2623module_init(ocfs2_init);
2624module_exit(ocfs2_exit);