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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 "ver.h"
72#include "xattr.h"
73#include "quota.h"
74#include "refcounttree.h"
75#include "suballoc.h"
76
77#include "buffer_head_io.h"
78
79static struct kmem_cache *ocfs2_inode_cachep = NULL;
80struct kmem_cache *ocfs2_dquot_cachep;
81struct kmem_cache *ocfs2_qf_chunk_cachep;
82
83/* OCFS2 needs to schedule several different types of work which
84 * require cluster locking, disk I/O, recovery waits, etc. Since these
85 * types of work tend to be heavy we avoid using the kernel events
86 * workqueue and schedule on our own. */
87struct workqueue_struct *ocfs2_wq = NULL;
88
89static struct dentry *ocfs2_debugfs_root = NULL;
90
91MODULE_AUTHOR("Oracle");
92MODULE_LICENSE("GPL");
93
94struct mount_options
95{
96 unsigned long commit_interval;
97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
100 int localalloc_opt;
101 unsigned int resv_level;
102 int dir_resv_level;
103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
104};
105
106static int ocfs2_parse_options(struct super_block *sb, char *options,
107 struct mount_options *mopt,
108 int is_remount);
109static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
111static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
112static void ocfs2_put_super(struct super_block *sb);
113static int ocfs2_mount_volume(struct super_block *sb);
114static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116static int ocfs2_initialize_mem_caches(void);
117static void ocfs2_free_mem_caches(void);
118static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
120static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
121
122static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
126static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
127static int ocfs2_check_volume(struct ocfs2_super *osb);
128static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
132static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
136static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
140static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141static void ocfs2_destroy_inode(struct inode *inode);
142static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144static void ocfs2_disable_quotas(struct ocfs2_super *osb);
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};
159
160enum {
161 Opt_barrier,
162 Opt_err_panic,
163 Opt_err_ro,
164 Opt_intr,
165 Opt_nointr,
166 Opt_hb_none,
167 Opt_hb_local,
168 Opt_hb_global,
169 Opt_data_ordered,
170 Opt_data_writeback,
171 Opt_atime_quantum,
172 Opt_slot,
173 Opt_commit,
174 Opt_localalloc,
175 Opt_localflocks,
176 Opt_stack,
177 Opt_user_xattr,
178 Opt_nouser_xattr,
179 Opt_inode64,
180 Opt_acl,
181 Opt_noacl,
182 Opt_usrquota,
183 Opt_grpquota,
184 Opt_coherency_buffered,
185 Opt_coherency_full,
186 Opt_resv_level,
187 Opt_dir_resv_level,
188 Opt_err,
189};
190
191static const match_table_t tokens = {
192 {Opt_barrier, "barrier=%u"},
193 {Opt_err_panic, "errors=panic"},
194 {Opt_err_ro, "errors=remount-ro"},
195 {Opt_intr, "intr"},
196 {Opt_nointr, "nointr"},
197 {Opt_hb_none, OCFS2_HB_NONE},
198 {Opt_hb_local, OCFS2_HB_LOCAL},
199 {Opt_hb_global, OCFS2_HB_GLOBAL},
200 {Opt_data_ordered, "data=ordered"},
201 {Opt_data_writeback, "data=writeback"},
202 {Opt_atime_quantum, "atime_quantum=%u"},
203 {Opt_slot, "preferred_slot=%u"},
204 {Opt_commit, "commit=%u"},
205 {Opt_localalloc, "localalloc=%d"},
206 {Opt_localflocks, "localflocks"},
207 {Opt_stack, "cluster_stack=%s"},
208 {Opt_user_xattr, "user_xattr"},
209 {Opt_nouser_xattr, "nouser_xattr"},
210 {Opt_inode64, "inode64"},
211 {Opt_acl, "acl"},
212 {Opt_noacl, "noacl"},
213 {Opt_usrquota, "usrquota"},
214 {Opt_grpquota, "grpquota"},
215 {Opt_coherency_buffered, "coherency=buffered"},
216 {Opt_coherency_full, "coherency=full"},
217 {Opt_resv_level, "resv_level=%u"},
218 {Opt_dir_resv_level, "dir_resv_level=%u"},
219 {Opt_err, NULL}
220};
221
222#ifdef CONFIG_DEBUG_FS
223static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
224{
225 struct ocfs2_cluster_connection *cconn = osb->cconn;
226 struct ocfs2_recovery_map *rm = osb->recovery_map;
227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
228 int i, out = 0;
229
230 out += snprintf(buf + out, len - out,
231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
232 "Device", osb->dev_str, osb->uuid_str,
233 osb->fs_generation, osb->vol_label);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => State: %d Flags: 0x%lX\n", "Volume",
237 atomic_read(&osb->vol_state), osb->osb_flags);
238
239 out += snprintf(buf + out, len - out,
240 "%10s => Block: %lu Cluster: %d\n", "Sizes",
241 osb->sb->s_blocksize, osb->s_clustersize);
242
243 out += snprintf(buf + out, len - out,
244 "%10s => Compat: 0x%X Incompat: 0x%X "
245 "ROcompat: 0x%X\n",
246 "Features", osb->s_feature_compat,
247 osb->s_feature_incompat, osb->s_feature_ro_compat);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
251 osb->s_mount_opt, osb->s_atime_quantum);
252
253 if (cconn) {
254 out += snprintf(buf + out, len - out,
255 "%10s => Stack: %s Name: %*s "
256 "Version: %d.%d\n", "Cluster",
257 (*osb->osb_cluster_stack == '\0' ?
258 "o2cb" : osb->osb_cluster_stack),
259 cconn->cc_namelen, cconn->cc_name,
260 cconn->cc_version.pv_major,
261 cconn->cc_version.pv_minor);
262 }
263
264 spin_lock(&osb->dc_task_lock);
265 out += snprintf(buf + out, len - out,
266 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
267 "WorkSeq: %lu\n", "DownCnvt",
268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
269 osb->blocked_lock_count, osb->dc_wake_sequence,
270 osb->dc_work_sequence);
271 spin_unlock(&osb->dc_task_lock);
272
273 spin_lock(&osb->osb_lock);
274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
275 "Recovery",
276 (osb->recovery_thread_task ?
277 task_pid_nr(osb->recovery_thread_task) : -1));
278 if (rm->rm_used == 0)
279 out += snprintf(buf + out, len - out, " None\n");
280 else {
281 for (i = 0; i < rm->rm_used; i++)
282 out += snprintf(buf + out, len - out, " %d",
283 rm->rm_entries[i]);
284 out += snprintf(buf + out, len - out, "\n");
285 }
286 spin_unlock(&osb->osb_lock);
287
288 out += snprintf(buf + out, len - out,
289 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
291 osb->osb_commit_interval,
292 atomic_read(&osb->needs_checkpoint));
293
294 out += snprintf(buf + out, len - out,
295 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
296 "Journal", osb->journal->j_state,
297 osb->journal->j_trans_id,
298 atomic_read(&osb->journal->j_num_trans));
299
300 out += snprintf(buf + out, len - out,
301 "%10s => GlobalAllocs: %d LocalAllocs: %d "
302 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
303 "Stats",
304 atomic_read(&osb->alloc_stats.bitmap_data),
305 atomic_read(&osb->alloc_stats.local_data),
306 atomic_read(&osb->alloc_stats.bg_allocs),
307 atomic_read(&osb->alloc_stats.moves),
308 atomic_read(&osb->alloc_stats.bg_extends));
309
310 out += snprintf(buf + out, len - out,
311 "%10s => State: %u Descriptor: %llu Size: %u bits "
312 "Default: %u bits\n",
313 "LocalAlloc", osb->local_alloc_state,
314 (unsigned long long)osb->la_last_gd,
315 osb->local_alloc_bits, osb->local_alloc_default_bits);
316
317 spin_lock(&osb->osb_lock);
318 out += snprintf(buf + out, len - out,
319 "%10s => InodeSlot: %d StolenInodes: %d, "
320 "MetaSlot: %d StolenMeta: %d\n", "Steal",
321 osb->s_inode_steal_slot,
322 atomic_read(&osb->s_num_inodes_stolen),
323 osb->s_meta_steal_slot,
324 atomic_read(&osb->s_num_meta_stolen));
325 spin_unlock(&osb->osb_lock);
326
327 out += snprintf(buf + out, len - out, "OrphanScan => ");
328 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
329 os->os_count, os->os_seqno);
330 out += snprintf(buf + out, len - out, " Last Scan: ");
331 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
332 out += snprintf(buf + out, len - out, "Disabled\n");
333 else
334 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
335 (get_seconds() - os->os_scantime.tv_sec));
336
337 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
338 "Slots", "Num", "RecoGen");
339 for (i = 0; i < osb->max_slots; ++i) {
340 out += snprintf(buf + out, len - out,
341 "%10s %c %3d %10d\n",
342 " ",
343 (i == osb->slot_num ? '*' : ' '),
344 i, osb->slot_recovery_generations[i]);
345 }
346
347 return out;
348}
349
350static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
351{
352 struct ocfs2_super *osb = inode->i_private;
353 char *buf = NULL;
354
355 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356 if (!buf)
357 goto bail;
358
359 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
360
361 file->private_data = buf;
362
363 return 0;
364bail:
365 return -ENOMEM;
366}
367
368static int ocfs2_debug_release(struct inode *inode, struct file *file)
369{
370 kfree(file->private_data);
371 return 0;
372}
373
374static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
375 size_t nbytes, loff_t *ppos)
376{
377 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
378 i_size_read(file->f_mapping->host));
379}
380#else
381static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
382{
383 return 0;
384}
385static int ocfs2_debug_release(struct inode *inode, struct file *file)
386{
387 return 0;
388}
389static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
390 size_t nbytes, loff_t *ppos)
391{
392 return 0;
393}
394#endif /* CONFIG_DEBUG_FS */
395
396static const struct file_operations ocfs2_osb_debug_fops = {
397 .open = ocfs2_osb_debug_open,
398 .release = ocfs2_debug_release,
399 .read = ocfs2_debug_read,
400 .llseek = generic_file_llseek,
401};
402
403static int ocfs2_sync_fs(struct super_block *sb, int wait)
404{
405 int status;
406 tid_t target;
407 struct ocfs2_super *osb = OCFS2_SB(sb);
408
409 if (ocfs2_is_hard_readonly(osb))
410 return -EROFS;
411
412 if (wait) {
413 status = ocfs2_flush_truncate_log(osb);
414 if (status < 0)
415 mlog_errno(status);
416 } else {
417 ocfs2_schedule_truncate_log_flush(osb, 0);
418 }
419
420 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
421 &target)) {
422 if (wait)
423 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
424 target);
425 }
426 return 0;
427}
428
429static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
430{
431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
432 && (ino == USER_QUOTA_SYSTEM_INODE
433 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
434 return 0;
435 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
436 && (ino == GROUP_QUOTA_SYSTEM_INODE
437 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
438 return 0;
439 return 1;
440}
441
442static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
443{
444 struct inode *new = NULL;
445 int status = 0;
446 int i;
447
448 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->root_inode = new;
455
456 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
457 if (IS_ERR(new)) {
458 status = PTR_ERR(new);
459 mlog_errno(status);
460 goto bail;
461 }
462 osb->sys_root_inode = new;
463
464 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
465 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
466 if (!ocfs2_need_system_inode(osb, i))
467 continue;
468 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
469 if (!new) {
470 ocfs2_release_system_inodes(osb);
471 status = -EINVAL;
472 mlog_errno(status);
473 /* FIXME: Should ERROR_RO_FS */
474 mlog(ML_ERROR, "Unable to load system inode %d, "
475 "possibly corrupt fs?", i);
476 goto bail;
477 }
478 // the array now has one ref, so drop this one
479 iput(new);
480 }
481
482bail:
483 if (status)
484 mlog_errno(status);
485 return status;
486}
487
488static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
489{
490 struct inode *new = NULL;
491 int status = 0;
492 int i;
493
494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
495 i < NUM_SYSTEM_INODES;
496 i++) {
497 if (!ocfs2_need_system_inode(osb, i))
498 continue;
499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
500 if (!new) {
501 ocfs2_release_system_inodes(osb);
502 status = -EINVAL;
503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
504 status, i, osb->slot_num);
505 goto bail;
506 }
507 /* the array now has one ref, so drop this one */
508 iput(new);
509 }
510
511bail:
512 if (status)
513 mlog_errno(status);
514 return status;
515}
516
517static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
518{
519 int i;
520 struct inode *inode;
521
522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
523 inode = osb->global_system_inodes[i];
524 if (inode) {
525 iput(inode);
526 osb->global_system_inodes[i] = NULL;
527 }
528 }
529
530 inode = osb->sys_root_inode;
531 if (inode) {
532 iput(inode);
533 osb->sys_root_inode = NULL;
534 }
535
536 inode = osb->root_inode;
537 if (inode) {
538 iput(inode);
539 osb->root_inode = NULL;
540 }
541
542 if (!osb->local_system_inodes)
543 return;
544
545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
546 if (osb->local_system_inodes[i]) {
547 iput(osb->local_system_inodes[i]);
548 osb->local_system_inodes[i] = NULL;
549 }
550 }
551
552 kfree(osb->local_system_inodes);
553 osb->local_system_inodes = NULL;
554}
555
556/* We're allocating fs objects, use GFP_NOFS */
557static struct inode *ocfs2_alloc_inode(struct super_block *sb)
558{
559 struct ocfs2_inode_info *oi;
560
561 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
562 if (!oi)
563 return NULL;
564
565 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
566 return &oi->vfs_inode;
567}
568
569static void ocfs2_i_callback(struct rcu_head *head)
570{
571 struct inode *inode = container_of(head, struct inode, i_rcu);
572 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
573}
574
575static void ocfs2_destroy_inode(struct inode *inode)
576{
577 call_rcu(&inode->i_rcu, ocfs2_i_callback);
578}
579
580static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
581 unsigned int cbits)
582{
583 unsigned int bytes = 1 << cbits;
584 unsigned int trim = bytes;
585 unsigned int bitshift = 32;
586
587 /*
588 * i_size and all block offsets in ocfs2 are always 64 bits
589 * wide. i_clusters is 32 bits, in cluster-sized units. So on
590 * 64 bit platforms, cluster size will be the limiting factor.
591 */
592
593#if BITS_PER_LONG == 32
594# if defined(CONFIG_LBDAF)
595 BUILD_BUG_ON(sizeof(sector_t) != 8);
596 /*
597 * We might be limited by page cache size.
598 */
599 if (bytes > PAGE_CACHE_SIZE) {
600 bytes = PAGE_CACHE_SIZE;
601 trim = 1;
602 /*
603 * Shift by 31 here so that we don't get larger than
604 * MAX_LFS_FILESIZE
605 */
606 bitshift = 31;
607 }
608# else
609 /*
610 * We are limited by the size of sector_t. Use block size, as
611 * that's what we expose to the VFS.
612 */
613 bytes = 1 << bbits;
614 trim = 1;
615 bitshift = 31;
616# endif
617#endif
618
619 /*
620 * Trim by a whole cluster when we can actually approach the
621 * on-disk limits. Otherwise we can overflow i_clusters when
622 * an extent start is at the max offset.
623 */
624 return (((unsigned long long)bytes) << bitshift) - trim;
625}
626
627static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
628{
629 int incompat_features;
630 int ret = 0;
631 struct mount_options parsed_options;
632 struct ocfs2_super *osb = OCFS2_SB(sb);
633 u32 tmp;
634
635 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
636 !ocfs2_check_set_options(sb, &parsed_options)) {
637 ret = -EINVAL;
638 goto out;
639 }
640
641 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
642 OCFS2_MOUNT_HB_NONE;
643 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
644 ret = -EINVAL;
645 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
646 goto out;
647 }
648
649 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
650 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
651 ret = -EINVAL;
652 mlog(ML_ERROR, "Cannot change data mode on remount\n");
653 goto out;
654 }
655
656 /* Probably don't want this on remount; it might
657 * mess with other nodes */
658 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
659 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
660 ret = -EINVAL;
661 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
662 goto out;
663 }
664
665 /* We're going to/from readonly mode. */
666 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
667 /* Disable quota accounting before remounting RO */
668 if (*flags & MS_RDONLY) {
669 ret = ocfs2_susp_quotas(osb, 0);
670 if (ret < 0)
671 goto out;
672 }
673 /* Lock here so the check of HARD_RO and the potential
674 * setting of SOFT_RO is atomic. */
675 spin_lock(&osb->osb_lock);
676 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
677 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
678 ret = -EROFS;
679 goto unlock_osb;
680 }
681
682 if (*flags & MS_RDONLY) {
683 sb->s_flags |= MS_RDONLY;
684 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
685 } else {
686 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
687 mlog(ML_ERROR, "Cannot remount RDWR "
688 "filesystem due to previous errors.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
693 if (incompat_features) {
694 mlog(ML_ERROR, "Cannot remount RDWR because "
695 "of unsupported optional features "
696 "(%x).\n", incompat_features);
697 ret = -EINVAL;
698 goto unlock_osb;
699 }
700 sb->s_flags &= ~MS_RDONLY;
701 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
702 }
703 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
704unlock_osb:
705 spin_unlock(&osb->osb_lock);
706 /* Enable quota accounting after remounting RW */
707 if (!ret && !(*flags & MS_RDONLY)) {
708 if (sb_any_quota_suspended(sb))
709 ret = ocfs2_susp_quotas(osb, 1);
710 else
711 ret = ocfs2_enable_quotas(osb);
712 if (ret < 0) {
713 /* Return back changes... */
714 spin_lock(&osb->osb_lock);
715 sb->s_flags |= MS_RDONLY;
716 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
717 spin_unlock(&osb->osb_lock);
718 goto out;
719 }
720 }
721 }
722
723 if (!ret) {
724 /* Only save off the new mount options in case of a successful
725 * remount. */
726 osb->s_mount_opt = parsed_options.mount_opt;
727 osb->s_atime_quantum = parsed_options.atime_quantum;
728 osb->preferred_slot = parsed_options.slot;
729 if (parsed_options.commit_interval)
730 osb->osb_commit_interval = parsed_options.commit_interval;
731
732 if (!ocfs2_is_hard_readonly(osb))
733 ocfs2_set_journal_params(osb);
734
735 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
736 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
737 MS_POSIXACL : 0);
738 }
739out:
740 return ret;
741}
742
743static int ocfs2_sb_probe(struct super_block *sb,
744 struct buffer_head **bh,
745 int *sector_size,
746 struct ocfs2_blockcheck_stats *stats)
747{
748 int status, tmpstat;
749 struct ocfs1_vol_disk_hdr *hdr;
750 struct ocfs2_dinode *di;
751 int blksize;
752
753 *bh = NULL;
754
755 /* may be > 512 */
756 *sector_size = bdev_logical_block_size(sb->s_bdev);
757 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
758 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
759 *sector_size, OCFS2_MAX_BLOCKSIZE);
760 status = -EINVAL;
761 goto bail;
762 }
763
764 /* Can this really happen? */
765 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
766 *sector_size = OCFS2_MIN_BLOCKSIZE;
767
768 /* check block zero for old format */
769 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
770 if (status < 0) {
771 mlog_errno(status);
772 goto bail;
773 }
774 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
775 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
776 mlog(ML_ERROR, "incompatible version: %u.%u\n",
777 hdr->major_version, hdr->minor_version);
778 status = -EINVAL;
779 }
780 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
781 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
782 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
783 hdr->signature);
784 status = -EINVAL;
785 }
786 brelse(*bh);
787 *bh = NULL;
788 if (status < 0) {
789 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
790 "upgraded before mounting with ocfs v2\n");
791 goto bail;
792 }
793
794 /*
795 * Now check at magic offset for 512, 1024, 2048, 4096
796 * blocksizes. 4096 is the maximum blocksize because it is
797 * the minimum clustersize.
798 */
799 status = -EINVAL;
800 for (blksize = *sector_size;
801 blksize <= OCFS2_MAX_BLOCKSIZE;
802 blksize <<= 1) {
803 tmpstat = ocfs2_get_sector(sb, bh,
804 OCFS2_SUPER_BLOCK_BLKNO,
805 blksize);
806 if (tmpstat < 0) {
807 status = tmpstat;
808 mlog_errno(status);
809 break;
810 }
811 di = (struct ocfs2_dinode *) (*bh)->b_data;
812 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
813 spin_lock_init(&stats->b_lock);
814 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
815 if (tmpstat < 0) {
816 brelse(*bh);
817 *bh = NULL;
818 }
819 if (tmpstat != -EAGAIN) {
820 status = tmpstat;
821 break;
822 }
823 }
824
825bail:
826 return status;
827}
828
829static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
830{
831 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
832
833 if (osb->s_mount_opt & hb_enabled) {
834 if (ocfs2_mount_local(osb)) {
835 mlog(ML_ERROR, "Cannot heartbeat on a locally "
836 "mounted device.\n");
837 return -EINVAL;
838 }
839 if (ocfs2_userspace_stack(osb)) {
840 mlog(ML_ERROR, "Userspace stack expected, but "
841 "o2cb heartbeat arguments passed to mount\n");
842 return -EINVAL;
843 }
844 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
845 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
846 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
847 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
848 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
849 return -EINVAL;
850 }
851 }
852
853 if (!(osb->s_mount_opt & hb_enabled)) {
854 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
855 !ocfs2_userspace_stack(osb)) {
856 mlog(ML_ERROR, "Heartbeat has to be started to mount "
857 "a read-write clustered device.\n");
858 return -EINVAL;
859 }
860 }
861
862 return 0;
863}
864
865/*
866 * If we're using a userspace stack, mount should have passed
867 * a name that matches the disk. If not, mount should not
868 * have passed a stack.
869 */
870static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
871 struct mount_options *mopt)
872{
873 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
874 mlog(ML_ERROR,
875 "cluster stack passed to mount, but this filesystem "
876 "does not support it\n");
877 return -EINVAL;
878 }
879
880 if (ocfs2_userspace_stack(osb) &&
881 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
882 OCFS2_STACK_LABEL_LEN)) {
883 mlog(ML_ERROR,
884 "cluster stack passed to mount (\"%s\") does not "
885 "match the filesystem (\"%s\")\n",
886 mopt->cluster_stack,
887 osb->osb_cluster_stack);
888 return -EINVAL;
889 }
890
891 return 0;
892}
893
894static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
895{
896 int type;
897 struct super_block *sb = osb->sb;
898 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
899 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
900 int status = 0;
901
902 for (type = 0; type < MAXQUOTAS; type++) {
903 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
904 continue;
905 if (unsuspend)
906 status = dquot_resume(sb, type);
907 else {
908 struct ocfs2_mem_dqinfo *oinfo;
909
910 /* Cancel periodic syncing before suspending */
911 oinfo = sb_dqinfo(sb, type)->dqi_priv;
912 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
913 status = dquot_suspend(sb, type);
914 }
915 if (status < 0)
916 break;
917 }
918 if (status < 0)
919 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
920 "remount (error = %d).\n", status);
921 return status;
922}
923
924static int ocfs2_enable_quotas(struct ocfs2_super *osb)
925{
926 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
927 struct super_block *sb = osb->sb;
928 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
929 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
930 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
931 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
932 int status;
933 int type;
934
935 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
936 for (type = 0; type < MAXQUOTAS; type++) {
937 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
938 continue;
939 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
940 osb->slot_num);
941 if (!inode[type]) {
942 status = -ENOENT;
943 goto out_quota_off;
944 }
945 status = dquot_enable(inode[type], type, QFMT_OCFS2,
946 DQUOT_USAGE_ENABLED);
947 if (status < 0)
948 goto out_quota_off;
949 }
950
951 for (type = 0; type < MAXQUOTAS; type++)
952 iput(inode[type]);
953 return 0;
954out_quota_off:
955 ocfs2_disable_quotas(osb);
956 for (type = 0; type < MAXQUOTAS; type++)
957 iput(inode[type]);
958 mlog_errno(status);
959 return status;
960}
961
962static void ocfs2_disable_quotas(struct ocfs2_super *osb)
963{
964 int type;
965 struct inode *inode;
966 struct super_block *sb = osb->sb;
967 struct ocfs2_mem_dqinfo *oinfo;
968
969 /* We mostly ignore errors in this function because there's not much
970 * we can do when we see them */
971 for (type = 0; type < MAXQUOTAS; type++) {
972 if (!sb_has_quota_loaded(sb, type))
973 continue;
974 /* Cancel periodic syncing before we grab dqonoff_mutex */
975 oinfo = sb_dqinfo(sb, type)->dqi_priv;
976 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
977 inode = igrab(sb->s_dquot.files[type]);
978 /* Turn off quotas. This will remove all dquot structures from
979 * memory and so they will be automatically synced to global
980 * quota files */
981 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
982 DQUOT_LIMITS_ENABLED);
983 if (!inode)
984 continue;
985 iput(inode);
986 }
987}
988
989/* Handle quota on quotactl */
990static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
991{
992 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
993 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
994
995 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
996 return -EINVAL;
997
998 return dquot_enable(sb_dqopt(sb)->files[type], type,
999 format_id, DQUOT_LIMITS_ENABLED);
1000}
1001
1002/* Handle quota off quotactl */
1003static int ocfs2_quota_off(struct super_block *sb, int type)
1004{
1005 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1006}
1007
1008static const struct quotactl_ops ocfs2_quotactl_ops = {
1009 .quota_on_meta = ocfs2_quota_on,
1010 .quota_off = ocfs2_quota_off,
1011 .quota_sync = dquot_quota_sync,
1012 .get_info = dquot_get_dqinfo,
1013 .set_info = dquot_set_dqinfo,
1014 .get_dqblk = dquot_get_dqblk,
1015 .set_dqblk = dquot_set_dqblk,
1016};
1017
1018static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1019{
1020 struct dentry *root;
1021 int status, sector_size;
1022 struct mount_options parsed_options;
1023 struct inode *inode = NULL;
1024 struct ocfs2_super *osb = NULL;
1025 struct buffer_head *bh = NULL;
1026 char nodestr[8];
1027 struct ocfs2_blockcheck_stats stats;
1028
1029 trace_ocfs2_fill_super(sb, data, silent);
1030
1031 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1032 status = -EINVAL;
1033 goto read_super_error;
1034 }
1035
1036 /* probe for superblock */
1037 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
1038 if (status < 0) {
1039 mlog(ML_ERROR, "superblock probe failed!\n");
1040 goto read_super_error;
1041 }
1042
1043 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1044 osb = OCFS2_SB(sb);
1045 if (status < 0) {
1046 mlog_errno(status);
1047 goto read_super_error;
1048 }
1049 brelse(bh);
1050 bh = NULL;
1051
1052 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1053 status = -EINVAL;
1054 goto read_super_error;
1055 }
1056 osb->s_mount_opt = parsed_options.mount_opt;
1057 osb->s_atime_quantum = parsed_options.atime_quantum;
1058 osb->preferred_slot = parsed_options.slot;
1059 osb->osb_commit_interval = parsed_options.commit_interval;
1060
1061 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1062 osb->osb_resv_level = parsed_options.resv_level;
1063 osb->osb_dir_resv_level = parsed_options.resv_level;
1064 if (parsed_options.dir_resv_level == -1)
1065 osb->osb_dir_resv_level = parsed_options.resv_level;
1066 else
1067 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1068
1069 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1070 if (status)
1071 goto read_super_error;
1072
1073 sb->s_magic = OCFS2_SUPER_MAGIC;
1074
1075 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1076 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1077
1078 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1079 * heartbeat=none */
1080 if (bdev_read_only(sb->s_bdev)) {
1081 if (!(sb->s_flags & MS_RDONLY)) {
1082 status = -EACCES;
1083 mlog(ML_ERROR, "Readonly device detected but readonly "
1084 "mount was not specified.\n");
1085 goto read_super_error;
1086 }
1087
1088 /* You should not be able to start a local heartbeat
1089 * on a readonly device. */
1090 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1091 status = -EROFS;
1092 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1093 "device.\n");
1094 goto read_super_error;
1095 }
1096
1097 status = ocfs2_check_journals_nolocks(osb);
1098 if (status < 0) {
1099 if (status == -EROFS)
1100 mlog(ML_ERROR, "Recovery required on readonly "
1101 "file system, but write access is "
1102 "unavailable.\n");
1103 else
1104 mlog_errno(status);
1105 goto read_super_error;
1106 }
1107
1108 ocfs2_set_ro_flag(osb, 1);
1109
1110 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1111 "Cluster services will not be used for this mount. "
1112 "Recovery will be skipped.\n", osb->dev_str);
1113 }
1114
1115 if (!ocfs2_is_hard_readonly(osb)) {
1116 if (sb->s_flags & MS_RDONLY)
1117 ocfs2_set_ro_flag(osb, 0);
1118 }
1119
1120 status = ocfs2_verify_heartbeat(osb);
1121 if (status < 0) {
1122 mlog_errno(status);
1123 goto read_super_error;
1124 }
1125
1126 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1127 ocfs2_debugfs_root);
1128 if (!osb->osb_debug_root) {
1129 status = -EINVAL;
1130 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1131 goto read_super_error;
1132 }
1133
1134 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1135 osb->osb_debug_root,
1136 osb,
1137 &ocfs2_osb_debug_fops);
1138 if (!osb->osb_ctxt) {
1139 status = -EINVAL;
1140 mlog_errno(status);
1141 goto read_super_error;
1142 }
1143
1144 if (ocfs2_meta_ecc(osb)) {
1145 status = ocfs2_blockcheck_stats_debugfs_install(
1146 &osb->osb_ecc_stats,
1147 osb->osb_debug_root);
1148 if (status) {
1149 mlog(ML_ERROR,
1150 "Unable to create blockcheck statistics "
1151 "files\n");
1152 goto read_super_error;
1153 }
1154 }
1155
1156 status = ocfs2_mount_volume(sb);
1157 if (status < 0)
1158 goto read_super_error;
1159
1160 if (osb->root_inode)
1161 inode = igrab(osb->root_inode);
1162
1163 if (!inode) {
1164 status = -EIO;
1165 mlog_errno(status);
1166 goto read_super_error;
1167 }
1168
1169 root = d_make_root(inode);
1170 if (!root) {
1171 status = -ENOMEM;
1172 mlog_errno(status);
1173 goto read_super_error;
1174 }
1175
1176 sb->s_root = root;
1177
1178 ocfs2_complete_mount_recovery(osb);
1179
1180 if (ocfs2_mount_local(osb))
1181 snprintf(nodestr, sizeof(nodestr), "local");
1182 else
1183 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1184
1185 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1186 "with %s data mode.\n",
1187 osb->dev_str, nodestr, osb->slot_num,
1188 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1189 "ordered");
1190
1191 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1192 wake_up(&osb->osb_mount_event);
1193
1194 /* Now we can initialize quotas because we can afford to wait
1195 * for cluster locks recovery now. That also means that truncation
1196 * log recovery can happen but that waits for proper quota setup */
1197 if (!(sb->s_flags & MS_RDONLY)) {
1198 status = ocfs2_enable_quotas(osb);
1199 if (status < 0) {
1200 /* We have to err-out specially here because
1201 * s_root is already set */
1202 mlog_errno(status);
1203 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1204 wake_up(&osb->osb_mount_event);
1205 return status;
1206 }
1207 }
1208
1209 ocfs2_complete_quota_recovery(osb);
1210
1211 /* Now we wake up again for processes waiting for quotas */
1212 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1213 wake_up(&osb->osb_mount_event);
1214
1215 /* Start this when the mount is almost sure of being successful */
1216 ocfs2_orphan_scan_start(osb);
1217
1218 return status;
1219
1220read_super_error:
1221 brelse(bh);
1222
1223 if (osb) {
1224 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1225 wake_up(&osb->osb_mount_event);
1226 ocfs2_dismount_volume(sb, 1);
1227 }
1228
1229 if (status)
1230 mlog_errno(status);
1231 return status;
1232}
1233
1234static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1235 int flags,
1236 const char *dev_name,
1237 void *data)
1238{
1239 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1240}
1241
1242static void ocfs2_kill_sb(struct super_block *sb)
1243{
1244 struct ocfs2_super *osb = OCFS2_SB(sb);
1245
1246 /* Failed mount? */
1247 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1248 goto out;
1249
1250 /* Prevent further queueing of inode drop events */
1251 spin_lock(&dentry_list_lock);
1252 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1253 spin_unlock(&dentry_list_lock);
1254 /* Wait for work to finish and/or remove it */
1255 cancel_work_sync(&osb->dentry_lock_work);
1256out:
1257 kill_block_super(sb);
1258}
1259
1260static struct file_system_type ocfs2_fs_type = {
1261 .owner = THIS_MODULE,
1262 .name = "ocfs2",
1263 .mount = ocfs2_mount,
1264 .kill_sb = ocfs2_kill_sb,
1265
1266 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1267 .next = NULL
1268};
1269
1270static int ocfs2_check_set_options(struct super_block *sb,
1271 struct mount_options *options)
1272{
1273 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1274 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1275 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1276 mlog(ML_ERROR, "User quotas were requested, but this "
1277 "filesystem does not have the feature enabled.\n");
1278 return 0;
1279 }
1280 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1281 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1282 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1283 mlog(ML_ERROR, "Group quotas were requested, but this "
1284 "filesystem does not have the feature enabled.\n");
1285 return 0;
1286 }
1287 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1288 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1289 mlog(ML_ERROR, "ACL support requested but extended attributes "
1290 "feature is not enabled\n");
1291 return 0;
1292 }
1293 /* No ACL setting specified? Use XATTR feature... */
1294 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1295 OCFS2_MOUNT_NO_POSIX_ACL))) {
1296 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1297 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1298 else
1299 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1300 }
1301 return 1;
1302}
1303
1304static int ocfs2_parse_options(struct super_block *sb,
1305 char *options,
1306 struct mount_options *mopt,
1307 int is_remount)
1308{
1309 int status, user_stack = 0;
1310 char *p;
1311 u32 tmp;
1312
1313 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1314
1315 mopt->commit_interval = 0;
1316 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1317 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1318 mopt->slot = OCFS2_INVALID_SLOT;
1319 mopt->localalloc_opt = -1;
1320 mopt->cluster_stack[0] = '\0';
1321 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1322 mopt->dir_resv_level = -1;
1323
1324 if (!options) {
1325 status = 1;
1326 goto bail;
1327 }
1328
1329 while ((p = strsep(&options, ",")) != NULL) {
1330 int token, option;
1331 substring_t args[MAX_OPT_ARGS];
1332
1333 if (!*p)
1334 continue;
1335
1336 token = match_token(p, tokens, args);
1337 switch (token) {
1338 case Opt_hb_local:
1339 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1340 break;
1341 case Opt_hb_none:
1342 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1343 break;
1344 case Opt_hb_global:
1345 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1346 break;
1347 case Opt_barrier:
1348 if (match_int(&args[0], &option)) {
1349 status = 0;
1350 goto bail;
1351 }
1352 if (option)
1353 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1354 else
1355 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1356 break;
1357 case Opt_intr:
1358 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1359 break;
1360 case Opt_nointr:
1361 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1362 break;
1363 case Opt_err_panic:
1364 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1365 break;
1366 case Opt_err_ro:
1367 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1368 break;
1369 case Opt_data_ordered:
1370 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1371 break;
1372 case Opt_data_writeback:
1373 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1374 break;
1375 case Opt_user_xattr:
1376 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1377 break;
1378 case Opt_nouser_xattr:
1379 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1380 break;
1381 case Opt_atime_quantum:
1382 if (match_int(&args[0], &option)) {
1383 status = 0;
1384 goto bail;
1385 }
1386 if (option >= 0)
1387 mopt->atime_quantum = option;
1388 break;
1389 case Opt_slot:
1390 option = 0;
1391 if (match_int(&args[0], &option)) {
1392 status = 0;
1393 goto bail;
1394 }
1395 if (option)
1396 mopt->slot = (s16)option;
1397 break;
1398 case Opt_commit:
1399 option = 0;
1400 if (match_int(&args[0], &option)) {
1401 status = 0;
1402 goto bail;
1403 }
1404 if (option < 0)
1405 return 0;
1406 if (option == 0)
1407 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1408 mopt->commit_interval = HZ * option;
1409 break;
1410 case Opt_localalloc:
1411 option = 0;
1412 if (match_int(&args[0], &option)) {
1413 status = 0;
1414 goto bail;
1415 }
1416 if (option >= 0)
1417 mopt->localalloc_opt = option;
1418 break;
1419 case Opt_localflocks:
1420 /*
1421 * Changing this during remount could race
1422 * flock() requests, or "unbalance" existing
1423 * ones (e.g., a lock is taken in one mode but
1424 * dropped in the other). If users care enough
1425 * to flip locking modes during remount, we
1426 * could add a "local" flag to individual
1427 * flock structures for proper tracking of
1428 * state.
1429 */
1430 if (!is_remount)
1431 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1432 break;
1433 case Opt_stack:
1434 /* Check both that the option we were passed
1435 * is of the right length and that it is a proper
1436 * string of the right length.
1437 */
1438 if (((args[0].to - args[0].from) !=
1439 OCFS2_STACK_LABEL_LEN) ||
1440 (strnlen(args[0].from,
1441 OCFS2_STACK_LABEL_LEN) !=
1442 OCFS2_STACK_LABEL_LEN)) {
1443 mlog(ML_ERROR,
1444 "Invalid cluster_stack option\n");
1445 status = 0;
1446 goto bail;
1447 }
1448 memcpy(mopt->cluster_stack, args[0].from,
1449 OCFS2_STACK_LABEL_LEN);
1450 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1451 /*
1452 * Open code the memcmp here as we don't have
1453 * an osb to pass to
1454 * ocfs2_userspace_stack().
1455 */
1456 if (memcmp(mopt->cluster_stack,
1457 OCFS2_CLASSIC_CLUSTER_STACK,
1458 OCFS2_STACK_LABEL_LEN))
1459 user_stack = 1;
1460 break;
1461 case Opt_inode64:
1462 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1463 break;
1464 case Opt_usrquota:
1465 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1466 break;
1467 case Opt_grpquota:
1468 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1469 break;
1470 case Opt_coherency_buffered:
1471 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1472 break;
1473 case Opt_coherency_full:
1474 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1475 break;
1476 case Opt_acl:
1477 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1478 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1479 break;
1480 case Opt_noacl:
1481 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1482 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1483 break;
1484 case Opt_resv_level:
1485 if (is_remount)
1486 break;
1487 if (match_int(&args[0], &option)) {
1488 status = 0;
1489 goto bail;
1490 }
1491 if (option >= OCFS2_MIN_RESV_LEVEL &&
1492 option < OCFS2_MAX_RESV_LEVEL)
1493 mopt->resv_level = option;
1494 break;
1495 case Opt_dir_resv_level:
1496 if (is_remount)
1497 break;
1498 if (match_int(&args[0], &option)) {
1499 status = 0;
1500 goto bail;
1501 }
1502 if (option >= OCFS2_MIN_RESV_LEVEL &&
1503 option < OCFS2_MAX_RESV_LEVEL)
1504 mopt->dir_resv_level = option;
1505 break;
1506 default:
1507 mlog(ML_ERROR,
1508 "Unrecognized mount option \"%s\" "
1509 "or missing value\n", p);
1510 status = 0;
1511 goto bail;
1512 }
1513 }
1514
1515 if (user_stack == 0) {
1516 /* Ensure only one heartbeat mode */
1517 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1518 OCFS2_MOUNT_HB_GLOBAL |
1519 OCFS2_MOUNT_HB_NONE);
1520 if (hweight32(tmp) != 1) {
1521 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1522 status = 0;
1523 goto bail;
1524 }
1525 }
1526
1527 status = 1;
1528
1529bail:
1530 return status;
1531}
1532
1533static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1534{
1535 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1536 unsigned long opts = osb->s_mount_opt;
1537 unsigned int local_alloc_megs;
1538
1539 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1540 seq_printf(s, ",_netdev");
1541 if (opts & OCFS2_MOUNT_HB_LOCAL)
1542 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1543 else
1544 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1545 } else
1546 seq_printf(s, ",%s", OCFS2_HB_NONE);
1547
1548 if (opts & OCFS2_MOUNT_NOINTR)
1549 seq_printf(s, ",nointr");
1550
1551 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1552 seq_printf(s, ",data=writeback");
1553 else
1554 seq_printf(s, ",data=ordered");
1555
1556 if (opts & OCFS2_MOUNT_BARRIER)
1557 seq_printf(s, ",barrier=1");
1558
1559 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1560 seq_printf(s, ",errors=panic");
1561 else
1562 seq_printf(s, ",errors=remount-ro");
1563
1564 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1565 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1566
1567 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1568
1569 if (osb->osb_commit_interval)
1570 seq_printf(s, ",commit=%u",
1571 (unsigned) (osb->osb_commit_interval / HZ));
1572
1573 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1574 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1575 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1576
1577 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1578 seq_printf(s, ",localflocks,");
1579
1580 if (osb->osb_cluster_stack[0])
1581 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1582 osb->osb_cluster_stack);
1583 if (opts & OCFS2_MOUNT_USRQUOTA)
1584 seq_printf(s, ",usrquota");
1585 if (opts & OCFS2_MOUNT_GRPQUOTA)
1586 seq_printf(s, ",grpquota");
1587
1588 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1589 seq_printf(s, ",coherency=buffered");
1590 else
1591 seq_printf(s, ",coherency=full");
1592
1593 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1594 seq_printf(s, ",nouser_xattr");
1595 else
1596 seq_printf(s, ",user_xattr");
1597
1598 if (opts & OCFS2_MOUNT_INODE64)
1599 seq_printf(s, ",inode64");
1600
1601 if (opts & OCFS2_MOUNT_POSIX_ACL)
1602 seq_printf(s, ",acl");
1603 else
1604 seq_printf(s, ",noacl");
1605
1606 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1607 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1608
1609 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1610 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1611
1612 return 0;
1613}
1614
1615wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ];
1616
1617static int __init ocfs2_init(void)
1618{
1619 int status, i;
1620
1621 ocfs2_print_version();
1622
1623 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++)
1624 init_waitqueue_head(&ocfs2__ioend_wq[i]);
1625
1626 status = init_ocfs2_uptodate_cache();
1627 if (status < 0)
1628 goto out1;
1629
1630 status = ocfs2_initialize_mem_caches();
1631 if (status < 0)
1632 goto out2;
1633
1634 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1635 if (!ocfs2_wq) {
1636 status = -ENOMEM;
1637 goto out3;
1638 }
1639
1640 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1641 if (!ocfs2_debugfs_root) {
1642 status = -EFAULT;
1643 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1644 }
1645
1646 ocfs2_set_locking_protocol();
1647
1648 status = register_quota_format(&ocfs2_quota_format);
1649 if (status < 0)
1650 goto out4;
1651 status = register_filesystem(&ocfs2_fs_type);
1652 if (!status)
1653 return 0;
1654
1655 unregister_quota_format(&ocfs2_quota_format);
1656out4:
1657 destroy_workqueue(ocfs2_wq);
1658 debugfs_remove(ocfs2_debugfs_root);
1659out3:
1660 ocfs2_free_mem_caches();
1661out2:
1662 exit_ocfs2_uptodate_cache();
1663out1:
1664 mlog_errno(status);
1665 return status;
1666}
1667
1668static void __exit ocfs2_exit(void)
1669{
1670 if (ocfs2_wq) {
1671 flush_workqueue(ocfs2_wq);
1672 destroy_workqueue(ocfs2_wq);
1673 }
1674
1675 unregister_quota_format(&ocfs2_quota_format);
1676
1677 debugfs_remove(ocfs2_debugfs_root);
1678
1679 ocfs2_free_mem_caches();
1680
1681 unregister_filesystem(&ocfs2_fs_type);
1682
1683 exit_ocfs2_uptodate_cache();
1684}
1685
1686static void ocfs2_put_super(struct super_block *sb)
1687{
1688 trace_ocfs2_put_super(sb);
1689
1690 ocfs2_sync_blockdev(sb);
1691 ocfs2_dismount_volume(sb, 0);
1692}
1693
1694static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1695{
1696 struct ocfs2_super *osb;
1697 u32 numbits, freebits;
1698 int status;
1699 struct ocfs2_dinode *bm_lock;
1700 struct buffer_head *bh = NULL;
1701 struct inode *inode = NULL;
1702
1703 trace_ocfs2_statfs(dentry->d_sb, buf);
1704
1705 osb = OCFS2_SB(dentry->d_sb);
1706
1707 inode = ocfs2_get_system_file_inode(osb,
1708 GLOBAL_BITMAP_SYSTEM_INODE,
1709 OCFS2_INVALID_SLOT);
1710 if (!inode) {
1711 mlog(ML_ERROR, "failed to get bitmap inode\n");
1712 status = -EIO;
1713 goto bail;
1714 }
1715
1716 status = ocfs2_inode_lock(inode, &bh, 0);
1717 if (status < 0) {
1718 mlog_errno(status);
1719 goto bail;
1720 }
1721
1722 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1723
1724 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1725 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1726
1727 buf->f_type = OCFS2_SUPER_MAGIC;
1728 buf->f_bsize = dentry->d_sb->s_blocksize;
1729 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1730 buf->f_blocks = ((sector_t) numbits) *
1731 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1732 buf->f_bfree = ((sector_t) freebits) *
1733 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1734 buf->f_bavail = buf->f_bfree;
1735 buf->f_files = numbits;
1736 buf->f_ffree = freebits;
1737 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1738 & 0xFFFFFFFFUL;
1739 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1740 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1741
1742 brelse(bh);
1743
1744 ocfs2_inode_unlock(inode, 0);
1745 status = 0;
1746bail:
1747 if (inode)
1748 iput(inode);
1749
1750 if (status)
1751 mlog_errno(status);
1752
1753 return status;
1754}
1755
1756static void ocfs2_inode_init_once(void *data)
1757{
1758 struct ocfs2_inode_info *oi = data;
1759
1760 oi->ip_flags = 0;
1761 oi->ip_open_count = 0;
1762 spin_lock_init(&oi->ip_lock);
1763 ocfs2_extent_map_init(&oi->vfs_inode);
1764 INIT_LIST_HEAD(&oi->ip_io_markers);
1765 oi->ip_dir_start_lookup = 0;
1766 atomic_set(&oi->ip_unaligned_aio, 0);
1767 init_rwsem(&oi->ip_alloc_sem);
1768 init_rwsem(&oi->ip_xattr_sem);
1769 mutex_init(&oi->ip_io_mutex);
1770
1771 oi->ip_blkno = 0ULL;
1772 oi->ip_clusters = 0;
1773
1774 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1775
1776 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1777 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1778 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1779
1780 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1781 &ocfs2_inode_caching_ops);
1782
1783 inode_init_once(&oi->vfs_inode);
1784}
1785
1786static int ocfs2_initialize_mem_caches(void)
1787{
1788 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1789 sizeof(struct ocfs2_inode_info),
1790 0,
1791 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1792 SLAB_MEM_SPREAD),
1793 ocfs2_inode_init_once);
1794 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1795 sizeof(struct ocfs2_dquot),
1796 0,
1797 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1798 SLAB_MEM_SPREAD),
1799 NULL);
1800 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1801 sizeof(struct ocfs2_quota_chunk),
1802 0,
1803 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1804 NULL);
1805 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1806 !ocfs2_qf_chunk_cachep) {
1807 if (ocfs2_inode_cachep)
1808 kmem_cache_destroy(ocfs2_inode_cachep);
1809 if (ocfs2_dquot_cachep)
1810 kmem_cache_destroy(ocfs2_dquot_cachep);
1811 if (ocfs2_qf_chunk_cachep)
1812 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1813 return -ENOMEM;
1814 }
1815
1816 return 0;
1817}
1818
1819static void ocfs2_free_mem_caches(void)
1820{
1821 if (ocfs2_inode_cachep)
1822 kmem_cache_destroy(ocfs2_inode_cachep);
1823 ocfs2_inode_cachep = NULL;
1824
1825 if (ocfs2_dquot_cachep)
1826 kmem_cache_destroy(ocfs2_dquot_cachep);
1827 ocfs2_dquot_cachep = NULL;
1828
1829 if (ocfs2_qf_chunk_cachep)
1830 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1831 ocfs2_qf_chunk_cachep = NULL;
1832}
1833
1834static int ocfs2_get_sector(struct super_block *sb,
1835 struct buffer_head **bh,
1836 int block,
1837 int sect_size)
1838{
1839 if (!sb_set_blocksize(sb, sect_size)) {
1840 mlog(ML_ERROR, "unable to set blocksize\n");
1841 return -EIO;
1842 }
1843
1844 *bh = sb_getblk(sb, block);
1845 if (!*bh) {
1846 mlog_errno(-EIO);
1847 return -EIO;
1848 }
1849 lock_buffer(*bh);
1850 if (!buffer_dirty(*bh))
1851 clear_buffer_uptodate(*bh);
1852 unlock_buffer(*bh);
1853 ll_rw_block(READ, 1, bh);
1854 wait_on_buffer(*bh);
1855 if (!buffer_uptodate(*bh)) {
1856 mlog_errno(-EIO);
1857 brelse(*bh);
1858 *bh = NULL;
1859 return -EIO;
1860 }
1861
1862 return 0;
1863}
1864
1865static int ocfs2_mount_volume(struct super_block *sb)
1866{
1867 int status = 0;
1868 int unlock_super = 0;
1869 struct ocfs2_super *osb = OCFS2_SB(sb);
1870
1871 if (ocfs2_is_hard_readonly(osb))
1872 goto leave;
1873
1874 status = ocfs2_dlm_init(osb);
1875 if (status < 0) {
1876 mlog_errno(status);
1877 goto leave;
1878 }
1879
1880 status = ocfs2_super_lock(osb, 1);
1881 if (status < 0) {
1882 mlog_errno(status);
1883 goto leave;
1884 }
1885 unlock_super = 1;
1886
1887 /* This will load up the node map and add ourselves to it. */
1888 status = ocfs2_find_slot(osb);
1889 if (status < 0) {
1890 mlog_errno(status);
1891 goto leave;
1892 }
1893
1894 /* load all node-local system inodes */
1895 status = ocfs2_init_local_system_inodes(osb);
1896 if (status < 0) {
1897 mlog_errno(status);
1898 goto leave;
1899 }
1900
1901 status = ocfs2_check_volume(osb);
1902 if (status < 0) {
1903 mlog_errno(status);
1904 goto leave;
1905 }
1906
1907 status = ocfs2_truncate_log_init(osb);
1908 if (status < 0)
1909 mlog_errno(status);
1910
1911leave:
1912 if (unlock_super)
1913 ocfs2_super_unlock(osb, 1);
1914
1915 return status;
1916}
1917
1918static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1919{
1920 int tmp, hangup_needed = 0;
1921 struct ocfs2_super *osb = NULL;
1922 char nodestr[8];
1923
1924 trace_ocfs2_dismount_volume(sb);
1925
1926 BUG_ON(!sb);
1927 osb = OCFS2_SB(sb);
1928 BUG_ON(!osb);
1929
1930 debugfs_remove(osb->osb_ctxt);
1931
1932 /*
1933 * Flush inode dropping work queue so that deletes are
1934 * performed while the filesystem is still working
1935 */
1936 ocfs2_drop_all_dl_inodes(osb);
1937
1938 /* Orphan scan should be stopped as early as possible */
1939 ocfs2_orphan_scan_stop(osb);
1940
1941 ocfs2_disable_quotas(osb);
1942
1943 ocfs2_shutdown_local_alloc(osb);
1944
1945 ocfs2_truncate_log_shutdown(osb);
1946
1947 /* This will disable recovery and flush any recovery work. */
1948 ocfs2_recovery_exit(osb);
1949
1950 ocfs2_journal_shutdown(osb);
1951
1952 ocfs2_sync_blockdev(sb);
1953
1954 ocfs2_purge_refcount_trees(osb);
1955
1956 /* No cluster connection means we've failed during mount, so skip
1957 * all the steps which depended on that to complete. */
1958 if (osb->cconn) {
1959 tmp = ocfs2_super_lock(osb, 1);
1960 if (tmp < 0) {
1961 mlog_errno(tmp);
1962 return;
1963 }
1964 }
1965
1966 if (osb->slot_num != OCFS2_INVALID_SLOT)
1967 ocfs2_put_slot(osb);
1968
1969 if (osb->cconn)
1970 ocfs2_super_unlock(osb, 1);
1971
1972 ocfs2_release_system_inodes(osb);
1973
1974 /*
1975 * If we're dismounting due to mount error, mount.ocfs2 will clean
1976 * up heartbeat. If we're a local mount, there is no heartbeat.
1977 * If we failed before we got a uuid_str yet, we can't stop
1978 * heartbeat. Otherwise, do it.
1979 */
1980 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1981 !ocfs2_is_hard_readonly(osb))
1982 hangup_needed = 1;
1983
1984 if (osb->cconn)
1985 ocfs2_dlm_shutdown(osb, hangup_needed);
1986
1987 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1988 debugfs_remove(osb->osb_debug_root);
1989
1990 if (hangup_needed)
1991 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1992
1993 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1994
1995 if (ocfs2_mount_local(osb))
1996 snprintf(nodestr, sizeof(nodestr), "local");
1997 else
1998 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1999
2000 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2001 osb->dev_str, nodestr);
2002
2003 ocfs2_delete_osb(osb);
2004 kfree(osb);
2005 sb->s_dev = 0;
2006 sb->s_fs_info = NULL;
2007}
2008
2009static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2010 unsigned uuid_bytes)
2011{
2012 int i, ret;
2013 char *ptr;
2014
2015 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2016
2017 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2018 if (osb->uuid_str == NULL)
2019 return -ENOMEM;
2020
2021 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2022 /* print with null */
2023 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2024 if (ret != 2) /* drop super cleans up */
2025 return -EINVAL;
2026 /* then only advance past the last char */
2027 ptr += 2;
2028 }
2029
2030 return 0;
2031}
2032
2033/* Make sure entire volume is addressable by our journal. Requires
2034 osb_clusters_at_boot to be valid and for the journal to have been
2035 initialized by ocfs2_journal_init(). */
2036static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2037{
2038 int status = 0;
2039 u64 max_block =
2040 ocfs2_clusters_to_blocks(osb->sb,
2041 osb->osb_clusters_at_boot) - 1;
2042
2043 /* 32-bit block number is always OK. */
2044 if (max_block <= (u32)~0ULL)
2045 goto out;
2046
2047 /* Volume is "huge", so see if our journal is new enough to
2048 support it. */
2049 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2050 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2051 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2052 JBD2_FEATURE_INCOMPAT_64BIT))) {
2053 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2054 "Enable the 'block64' journal option with tunefs.ocfs2");
2055 status = -EFBIG;
2056 goto out;
2057 }
2058
2059 out:
2060 return status;
2061}
2062
2063static int ocfs2_initialize_super(struct super_block *sb,
2064 struct buffer_head *bh,
2065 int sector_size,
2066 struct ocfs2_blockcheck_stats *stats)
2067{
2068 int status;
2069 int i, cbits, bbits;
2070 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2071 struct inode *inode = NULL;
2072 struct ocfs2_journal *journal;
2073 __le32 uuid_net_key;
2074 struct ocfs2_super *osb;
2075 u64 total_blocks;
2076
2077 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2078 if (!osb) {
2079 status = -ENOMEM;
2080 mlog_errno(status);
2081 goto bail;
2082 }
2083
2084 sb->s_fs_info = osb;
2085 sb->s_op = &ocfs2_sops;
2086 sb->s_d_op = &ocfs2_dentry_ops;
2087 sb->s_export_op = &ocfs2_export_ops;
2088 sb->s_qcop = &ocfs2_quotactl_ops;
2089 sb->dq_op = &ocfs2_quota_operations;
2090 sb->s_xattr = ocfs2_xattr_handlers;
2091 sb->s_time_gran = 1;
2092 sb->s_flags |= MS_NOATIME;
2093 /* this is needed to support O_LARGEFILE */
2094 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2095 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2096 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2097
2098 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2099
2100 for (i = 0; i < 3; i++)
2101 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2102 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2103
2104 osb->sb = sb;
2105 /* Save off for ocfs2_rw_direct */
2106 osb->s_sectsize_bits = blksize_bits(sector_size);
2107 BUG_ON(!osb->s_sectsize_bits);
2108
2109 spin_lock_init(&osb->dc_task_lock);
2110 init_waitqueue_head(&osb->dc_event);
2111 osb->dc_work_sequence = 0;
2112 osb->dc_wake_sequence = 0;
2113 INIT_LIST_HEAD(&osb->blocked_lock_list);
2114 osb->blocked_lock_count = 0;
2115 spin_lock_init(&osb->osb_lock);
2116 spin_lock_init(&osb->osb_xattr_lock);
2117 ocfs2_init_steal_slots(osb);
2118
2119 atomic_set(&osb->alloc_stats.moves, 0);
2120 atomic_set(&osb->alloc_stats.local_data, 0);
2121 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2122 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2123 atomic_set(&osb->alloc_stats.bg_extends, 0);
2124
2125 /* Copy the blockcheck stats from the superblock probe */
2126 osb->osb_ecc_stats = *stats;
2127
2128 ocfs2_init_node_maps(osb);
2129
2130 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2131 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2132
2133 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2134 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2135 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2136 osb->max_slots);
2137 status = -EINVAL;
2138 goto bail;
2139 }
2140
2141 ocfs2_orphan_scan_init(osb);
2142
2143 status = ocfs2_recovery_init(osb);
2144 if (status) {
2145 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2146 mlog_errno(status);
2147 goto bail;
2148 }
2149
2150 init_waitqueue_head(&osb->checkpoint_event);
2151 atomic_set(&osb->needs_checkpoint, 0);
2152
2153 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2154
2155 osb->slot_num = OCFS2_INVALID_SLOT;
2156
2157 osb->s_xattr_inline_size = le16_to_cpu(
2158 di->id2.i_super.s_xattr_inline_size);
2159
2160 osb->local_alloc_state = OCFS2_LA_UNUSED;
2161 osb->local_alloc_bh = NULL;
2162 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2163
2164 init_waitqueue_head(&osb->osb_mount_event);
2165
2166 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2167 if (status) {
2168 mlog_errno(status);
2169 goto bail;
2170 }
2171
2172 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2173 if (!osb->vol_label) {
2174 mlog(ML_ERROR, "unable to alloc vol label\n");
2175 status = -ENOMEM;
2176 goto bail;
2177 }
2178
2179 osb->slot_recovery_generations =
2180 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2181 GFP_KERNEL);
2182 if (!osb->slot_recovery_generations) {
2183 status = -ENOMEM;
2184 mlog_errno(status);
2185 goto bail;
2186 }
2187
2188 init_waitqueue_head(&osb->osb_wipe_event);
2189 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2190 sizeof(*osb->osb_orphan_wipes),
2191 GFP_KERNEL);
2192 if (!osb->osb_orphan_wipes) {
2193 status = -ENOMEM;
2194 mlog_errno(status);
2195 goto bail;
2196 }
2197
2198 osb->osb_rf_lock_tree = RB_ROOT;
2199
2200 osb->s_feature_compat =
2201 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2202 osb->s_feature_ro_compat =
2203 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2204 osb->s_feature_incompat =
2205 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2206
2207 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2208 mlog(ML_ERROR, "couldn't mount because of unsupported "
2209 "optional features (%x).\n", i);
2210 status = -EINVAL;
2211 goto bail;
2212 }
2213 if (!(osb->sb->s_flags & MS_RDONLY) &&
2214 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2215 mlog(ML_ERROR, "couldn't mount RDWR because of "
2216 "unsupported optional features (%x).\n", i);
2217 status = -EINVAL;
2218 goto bail;
2219 }
2220
2221 if (ocfs2_clusterinfo_valid(osb)) {
2222 osb->osb_stackflags =
2223 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2224 memcpy(osb->osb_cluster_stack,
2225 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2226 OCFS2_STACK_LABEL_LEN);
2227 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2228 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2229 mlog(ML_ERROR,
2230 "couldn't mount because of an invalid "
2231 "cluster stack label (%s) \n",
2232 osb->osb_cluster_stack);
2233 status = -EINVAL;
2234 goto bail;
2235 }
2236 } else {
2237 /* The empty string is identical with classic tools that
2238 * don't know about s_cluster_info. */
2239 osb->osb_cluster_stack[0] = '\0';
2240 }
2241
2242 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2243
2244 /* FIXME
2245 * This should be done in ocfs2_journal_init(), but unknown
2246 * ordering issues will cause the filesystem to crash.
2247 * If anyone wants to figure out what part of the code
2248 * refers to osb->journal before ocfs2_journal_init() is run,
2249 * be my guest.
2250 */
2251 /* initialize our journal structure */
2252
2253 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2254 if (!journal) {
2255 mlog(ML_ERROR, "unable to alloc journal\n");
2256 status = -ENOMEM;
2257 goto bail;
2258 }
2259 osb->journal = journal;
2260 journal->j_osb = osb;
2261
2262 atomic_set(&journal->j_num_trans, 0);
2263 init_rwsem(&journal->j_trans_barrier);
2264 init_waitqueue_head(&journal->j_checkpointed);
2265 spin_lock_init(&journal->j_lock);
2266 journal->j_trans_id = (unsigned long) 1;
2267 INIT_LIST_HEAD(&journal->j_la_cleanups);
2268 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2269 journal->j_state = OCFS2_JOURNAL_FREE;
2270
2271 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2272 osb->dentry_lock_list = NULL;
2273
2274 /* get some pseudo constants for clustersize bits */
2275 osb->s_clustersize_bits =
2276 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2277 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2278
2279 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2280 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2281 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2282 osb->s_clustersize);
2283 status = -EINVAL;
2284 goto bail;
2285 }
2286
2287 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2288 le32_to_cpu(di->i_clusters));
2289
2290 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2291 total_blocks);
2292 if (status) {
2293 mlog(ML_ERROR, "Volume too large "
2294 "to mount safely on this system");
2295 status = -EFBIG;
2296 goto bail;
2297 }
2298
2299 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2300 sizeof(di->id2.i_super.s_uuid))) {
2301 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2302 status = -ENOMEM;
2303 goto bail;
2304 }
2305
2306 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2307
2308 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2309 osb->vol_label[63] = '\0';
2310 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2311 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2312 osb->first_cluster_group_blkno =
2313 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2314 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2315 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2316 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2317 (unsigned long long)osb->root_blkno,
2318 (unsigned long long)osb->system_dir_blkno,
2319 osb->s_clustersize_bits);
2320
2321 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2322 if (!osb->osb_dlm_debug) {
2323 status = -ENOMEM;
2324 mlog_errno(status);
2325 goto bail;
2326 }
2327
2328 atomic_set(&osb->vol_state, VOLUME_INIT);
2329
2330 /* load root, system_dir, and all global system inodes */
2331 status = ocfs2_init_global_system_inodes(osb);
2332 if (status < 0) {
2333 mlog_errno(status);
2334 goto bail;
2335 }
2336
2337 /*
2338 * global bitmap
2339 */
2340 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2341 OCFS2_INVALID_SLOT);
2342 if (!inode) {
2343 status = -EINVAL;
2344 mlog_errno(status);
2345 goto bail;
2346 }
2347
2348 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2349 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2350 iput(inode);
2351
2352 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2353 osb->s_feature_incompat) * 8;
2354
2355 status = ocfs2_init_slot_info(osb);
2356 if (status < 0) {
2357 mlog_errno(status);
2358 goto bail;
2359 }
2360 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb);
2361
2362bail:
2363 return status;
2364}
2365
2366/*
2367 * will return: -EAGAIN if it is ok to keep searching for superblocks
2368 * -EINVAL if there is a bad superblock
2369 * 0 on success
2370 */
2371static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2372 struct buffer_head *bh,
2373 u32 blksz,
2374 struct ocfs2_blockcheck_stats *stats)
2375{
2376 int status = -EAGAIN;
2377
2378 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2379 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2380 /* We have to do a raw check of the feature here */
2381 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2382 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2383 status = ocfs2_block_check_validate(bh->b_data,
2384 bh->b_size,
2385 &di->i_check,
2386 stats);
2387 if (status)
2388 goto out;
2389 }
2390 status = -EINVAL;
2391 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2392 mlog(ML_ERROR, "found superblock with incorrect block "
2393 "size: found %u, should be %u\n",
2394 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2395 blksz);
2396 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2397 OCFS2_MAJOR_REV_LEVEL ||
2398 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2399 OCFS2_MINOR_REV_LEVEL) {
2400 mlog(ML_ERROR, "found superblock with bad version: "
2401 "found %u.%u, should be %u.%u\n",
2402 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2403 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2404 OCFS2_MAJOR_REV_LEVEL,
2405 OCFS2_MINOR_REV_LEVEL);
2406 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2407 mlog(ML_ERROR, "bad block number on superblock: "
2408 "found %llu, should be %llu\n",
2409 (unsigned long long)le64_to_cpu(di->i_blkno),
2410 (unsigned long long)bh->b_blocknr);
2411 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2412 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2413 mlog(ML_ERROR, "bad cluster size found: %u\n",
2414 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2415 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2416 mlog(ML_ERROR, "bad root_blkno: 0\n");
2417 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2418 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2419 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2420 mlog(ML_ERROR,
2421 "Superblock slots found greater than file system "
2422 "maximum: found %u, max %u\n",
2423 le16_to_cpu(di->id2.i_super.s_max_slots),
2424 OCFS2_MAX_SLOTS);
2425 } else {
2426 /* found it! */
2427 status = 0;
2428 }
2429 }
2430
2431out:
2432 if (status && status != -EAGAIN)
2433 mlog_errno(status);
2434 return status;
2435}
2436
2437static int ocfs2_check_volume(struct ocfs2_super *osb)
2438{
2439 int status;
2440 int dirty;
2441 int local;
2442 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2443 * recover
2444 * ourselves. */
2445
2446 /* Init our journal object. */
2447 status = ocfs2_journal_init(osb->journal, &dirty);
2448 if (status < 0) {
2449 mlog(ML_ERROR, "Could not initialize journal!\n");
2450 goto finally;
2451 }
2452
2453 /* Now that journal has been initialized, check to make sure
2454 entire volume is addressable. */
2455 status = ocfs2_journal_addressable(osb);
2456 if (status)
2457 goto finally;
2458
2459 /* If the journal was unmounted cleanly then we don't want to
2460 * recover anything. Otherwise, journal_load will do that
2461 * dirty work for us :) */
2462 if (!dirty) {
2463 status = ocfs2_journal_wipe(osb->journal, 0);
2464 if (status < 0) {
2465 mlog_errno(status);
2466 goto finally;
2467 }
2468 } else {
2469 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2470 "unmounted cleanly, recovering it.\n", osb->dev_str);
2471 }
2472
2473 local = ocfs2_mount_local(osb);
2474
2475 /* will play back anything left in the journal. */
2476 status = ocfs2_journal_load(osb->journal, local, dirty);
2477 if (status < 0) {
2478 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2479 goto finally;
2480 }
2481
2482 if (dirty) {
2483 /* recover my local alloc if we didn't unmount cleanly. */
2484 status = ocfs2_begin_local_alloc_recovery(osb,
2485 osb->slot_num,
2486 &local_alloc);
2487 if (status < 0) {
2488 mlog_errno(status);
2489 goto finally;
2490 }
2491 /* we complete the recovery process after we've marked
2492 * ourselves as mounted. */
2493 }
2494
2495 status = ocfs2_load_local_alloc(osb);
2496 if (status < 0) {
2497 mlog_errno(status);
2498 goto finally;
2499 }
2500
2501 if (dirty) {
2502 /* Recovery will be completed after we've mounted the
2503 * rest of the volume. */
2504 osb->dirty = 1;
2505 osb->local_alloc_copy = local_alloc;
2506 local_alloc = NULL;
2507 }
2508
2509 /* go through each journal, trylock it and if you get the
2510 * lock, and it's marked as dirty, set the bit in the recover
2511 * map and launch a recovery thread for it. */
2512 status = ocfs2_mark_dead_nodes(osb);
2513 if (status < 0) {
2514 mlog_errno(status);
2515 goto finally;
2516 }
2517
2518 status = ocfs2_compute_replay_slots(osb);
2519 if (status < 0)
2520 mlog_errno(status);
2521
2522finally:
2523 if (local_alloc)
2524 kfree(local_alloc);
2525
2526 if (status)
2527 mlog_errno(status);
2528 return status;
2529}
2530
2531/*
2532 * The routine gets called from dismount or close whenever a dismount on
2533 * volume is requested and the osb open count becomes 1.
2534 * It will remove the osb from the global list and also free up all the
2535 * initialized resources and fileobject.
2536 */
2537static void ocfs2_delete_osb(struct ocfs2_super *osb)
2538{
2539 /* This function assumes that the caller has the main osb resource */
2540
2541 ocfs2_free_slot_info(osb);
2542
2543 kfree(osb->osb_orphan_wipes);
2544 kfree(osb->slot_recovery_generations);
2545 /* FIXME
2546 * This belongs in journal shutdown, but because we have to
2547 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2548 * we free it here.
2549 */
2550 kfree(osb->journal);
2551 if (osb->local_alloc_copy)
2552 kfree(osb->local_alloc_copy);
2553 kfree(osb->uuid_str);
2554 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2555 memset(osb, 0, sizeof(struct ocfs2_super));
2556}
2557
2558/* Put OCFS2 into a readonly state, or (if the user specifies it),
2559 * panic(). We do not support continue-on-error operation. */
2560static void ocfs2_handle_error(struct super_block *sb)
2561{
2562 struct ocfs2_super *osb = OCFS2_SB(sb);
2563
2564 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2565 panic("OCFS2: (device %s): panic forced after error\n",
2566 sb->s_id);
2567
2568 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2569
2570 if (sb->s_flags & MS_RDONLY &&
2571 (ocfs2_is_soft_readonly(osb) ||
2572 ocfs2_is_hard_readonly(osb)))
2573 return;
2574
2575 printk(KERN_CRIT "File system is now read-only due to the potential "
2576 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2577 "system is unmounted.\n");
2578 sb->s_flags |= MS_RDONLY;
2579 ocfs2_set_ro_flag(osb, 0);
2580}
2581
2582static char error_buf[1024];
2583
2584void __ocfs2_error(struct super_block *sb,
2585 const char *function,
2586 const char *fmt, ...)
2587{
2588 va_list args;
2589
2590 va_start(args, fmt);
2591 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2592 va_end(args);
2593
2594 /* Not using mlog here because we want to show the actual
2595 * function the error came from. */
2596 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2597 sb->s_id, function, error_buf);
2598
2599 ocfs2_handle_error(sb);
2600}
2601
2602/* Handle critical errors. This is intentionally more drastic than
2603 * ocfs2_handle_error, so we only use for things like journal errors,
2604 * etc. */
2605void __ocfs2_abort(struct super_block* sb,
2606 const char *function,
2607 const char *fmt, ...)
2608{
2609 va_list args;
2610
2611 va_start(args, fmt);
2612 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2613 va_end(args);
2614
2615 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2616 sb->s_id, function, error_buf);
2617
2618 /* We don't have the cluster support yet to go straight to
2619 * hard readonly in here. Until then, we want to keep
2620 * ocfs2_abort() so that we can at least mark critical
2621 * errors.
2622 *
2623 * TODO: This should abort the journal and alert other nodes
2624 * that our slot needs recovery. */
2625
2626 /* Force a panic(). This stinks, but it's better than letting
2627 * things continue without having a proper hard readonly
2628 * here. */
2629 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2630 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2631 ocfs2_handle_error(sb);
2632}
2633
2634/*
2635 * Void signal blockers, because in-kernel sigprocmask() only fails
2636 * when SIG_* is wrong.
2637 */
2638void ocfs2_block_signals(sigset_t *oldset)
2639{
2640 int rc;
2641 sigset_t blocked;
2642
2643 sigfillset(&blocked);
2644 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2645 BUG_ON(rc);
2646}
2647
2648void ocfs2_unblock_signals(sigset_t *oldset)
2649{
2650 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2651 BUG_ON(rc);
2652}
2653
2654module_init(ocfs2_init);
2655module_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 **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 oinfo = sb_dqinfo(sb, type)->dqi_priv;
956 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
957 inode = igrab(sb->s_dquot.files[type]);
958 /* Turn off quotas. This will remove all dquot structures from
959 * memory and so they will be automatically synced to global
960 * quota files */
961 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
962 DQUOT_LIMITS_ENABLED);
963 iput(inode);
964 }
965}
966
967static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
968{
969 struct dentry *root;
970 int status, sector_size;
971 struct mount_options parsed_options;
972 struct inode *inode = NULL;
973 struct ocfs2_super *osb = NULL;
974 struct buffer_head *bh = NULL;
975 char nodestr[12];
976 struct ocfs2_blockcheck_stats stats;
977
978 trace_ocfs2_fill_super(sb, data, silent);
979
980 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
981 status = -EINVAL;
982 goto out;
983 }
984
985 /* probe for superblock */
986 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
987 if (status < 0) {
988 mlog(ML_ERROR, "superblock probe failed!\n");
989 goto out;
990 }
991
992 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
993 brelse(bh);
994 bh = NULL;
995 if (status < 0)
996 goto out;
997
998 osb = OCFS2_SB(sb);
999
1000 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1001 status = -EINVAL;
1002 goto out_super;
1003 }
1004 osb->s_mount_opt = parsed_options.mount_opt;
1005 osb->s_atime_quantum = parsed_options.atime_quantum;
1006 osb->preferred_slot = parsed_options.slot;
1007 osb->osb_commit_interval = parsed_options.commit_interval;
1008
1009 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1010 osb->osb_resv_level = parsed_options.resv_level;
1011 osb->osb_dir_resv_level = parsed_options.resv_level;
1012 if (parsed_options.dir_resv_level == -1)
1013 osb->osb_dir_resv_level = parsed_options.resv_level;
1014 else
1015 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1016
1017 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1018 if (status)
1019 goto out_super;
1020
1021 sb->s_magic = OCFS2_SUPER_MAGIC;
1022
1023 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1024 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1025
1026 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1027 * heartbeat=none */
1028 if (bdev_read_only(sb->s_bdev)) {
1029 if (!sb_rdonly(sb)) {
1030 status = -EACCES;
1031 mlog(ML_ERROR, "Readonly device detected but readonly "
1032 "mount was not specified.\n");
1033 goto out_super;
1034 }
1035
1036 /* You should not be able to start a local heartbeat
1037 * on a readonly device. */
1038 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1039 status = -EROFS;
1040 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1041 "device.\n");
1042 goto out_super;
1043 }
1044
1045 status = ocfs2_check_journals_nolocks(osb);
1046 if (status < 0) {
1047 if (status == -EROFS)
1048 mlog(ML_ERROR, "Recovery required on readonly "
1049 "file system, but write access is "
1050 "unavailable.\n");
1051 goto out_super;
1052 }
1053
1054 ocfs2_set_ro_flag(osb, 1);
1055
1056 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1057 "Cluster services will not be used for this mount. "
1058 "Recovery will be skipped.\n", osb->dev_str);
1059 }
1060
1061 if (!ocfs2_is_hard_readonly(osb)) {
1062 if (sb_rdonly(sb))
1063 ocfs2_set_ro_flag(osb, 0);
1064 }
1065
1066 status = ocfs2_verify_heartbeat(osb);
1067 if (status < 0)
1068 goto out_super;
1069
1070 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1071 ocfs2_debugfs_root);
1072
1073 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1074 osb, &ocfs2_osb_debug_fops);
1075
1076 if (ocfs2_meta_ecc(osb))
1077 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1078 osb->osb_debug_root);
1079
1080 status = ocfs2_mount_volume(sb);
1081 if (status < 0)
1082 goto out_debugfs;
1083
1084 if (osb->root_inode)
1085 inode = igrab(osb->root_inode);
1086
1087 if (!inode) {
1088 status = -EIO;
1089 goto out_dismount;
1090 }
1091
1092 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1093 &ocfs2_kset->kobj);
1094 if (!osb->osb_dev_kset) {
1095 status = -ENOMEM;
1096 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1097 goto out_dismount;
1098 }
1099
1100 /* Create filecheck sysfs related directories/files at
1101 * /sys/fs/ocfs2/<devname>/filecheck */
1102 if (ocfs2_filecheck_create_sysfs(osb)) {
1103 status = -ENOMEM;
1104 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1105 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1106 goto out_dismount;
1107 }
1108
1109 root = d_make_root(inode);
1110 if (!root) {
1111 status = -ENOMEM;
1112 goto out_dismount;
1113 }
1114
1115 sb->s_root = root;
1116
1117 ocfs2_complete_mount_recovery(osb);
1118
1119 if (ocfs2_mount_local(osb))
1120 snprintf(nodestr, sizeof(nodestr), "local");
1121 else
1122 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1123
1124 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1125 "with %s data mode.\n",
1126 osb->dev_str, nodestr, osb->slot_num,
1127 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1128 "ordered");
1129
1130 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1131 wake_up(&osb->osb_mount_event);
1132
1133 /* Now we can initialize quotas because we can afford to wait
1134 * for cluster locks recovery now. That also means that truncation
1135 * log recovery can happen but that waits for proper quota setup */
1136 if (!sb_rdonly(sb)) {
1137 status = ocfs2_enable_quotas(osb);
1138 if (status < 0) {
1139 /* We have to err-out specially here because
1140 * s_root is already set */
1141 mlog_errno(status);
1142 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1143 wake_up(&osb->osb_mount_event);
1144 return status;
1145 }
1146 }
1147
1148 ocfs2_complete_quota_recovery(osb);
1149
1150 /* Now we wake up again for processes waiting for quotas */
1151 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1152 wake_up(&osb->osb_mount_event);
1153
1154 /* Start this when the mount is almost sure of being successful */
1155 ocfs2_orphan_scan_start(osb);
1156
1157 return status;
1158
1159out_dismount:
1160 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1161 wake_up(&osb->osb_mount_event);
1162 ocfs2_free_replay_slots(osb);
1163 ocfs2_dismount_volume(sb, 1);
1164 goto out;
1165
1166out_debugfs:
1167 debugfs_remove_recursive(osb->osb_debug_root);
1168out_super:
1169 ocfs2_release_system_inodes(osb);
1170 kfree(osb->recovery_map);
1171 ocfs2_delete_osb(osb);
1172 kfree(osb);
1173out:
1174 mlog_errno(status);
1175
1176 return status;
1177}
1178
1179static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1180 int flags,
1181 const char *dev_name,
1182 void *data)
1183{
1184 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1185}
1186
1187static struct file_system_type ocfs2_fs_type = {
1188 .owner = THIS_MODULE,
1189 .name = "ocfs2",
1190 .mount = ocfs2_mount,
1191 .kill_sb = kill_block_super,
1192 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1193 .next = NULL
1194};
1195MODULE_ALIAS_FS("ocfs2");
1196
1197static int ocfs2_check_set_options(struct super_block *sb,
1198 struct mount_options *options)
1199{
1200 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1201 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1202 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1203 mlog(ML_ERROR, "User quotas were requested, but this "
1204 "filesystem does not have the feature enabled.\n");
1205 return 0;
1206 }
1207 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1208 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1209 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1210 mlog(ML_ERROR, "Group quotas were requested, but this "
1211 "filesystem does not have the feature enabled.\n");
1212 return 0;
1213 }
1214 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1215 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1216 mlog(ML_ERROR, "ACL support requested but extended attributes "
1217 "feature is not enabled\n");
1218 return 0;
1219 }
1220 /* No ACL setting specified? Use XATTR feature... */
1221 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1222 OCFS2_MOUNT_NO_POSIX_ACL))) {
1223 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1224 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1225 else
1226 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1227 }
1228 return 1;
1229}
1230
1231static int ocfs2_parse_options(struct super_block *sb,
1232 char *options,
1233 struct mount_options *mopt,
1234 int is_remount)
1235{
1236 int status, user_stack = 0;
1237 char *p;
1238 u32 tmp;
1239 int token, option;
1240 substring_t args[MAX_OPT_ARGS];
1241
1242 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1243
1244 mopt->commit_interval = 0;
1245 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1246 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1247 mopt->slot = OCFS2_INVALID_SLOT;
1248 mopt->localalloc_opt = -1;
1249 mopt->cluster_stack[0] = '\0';
1250 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1251 mopt->dir_resv_level = -1;
1252
1253 if (!options) {
1254 status = 1;
1255 goto bail;
1256 }
1257
1258 while ((p = strsep(&options, ",")) != NULL) {
1259 if (!*p)
1260 continue;
1261
1262 token = match_token(p, tokens, args);
1263 switch (token) {
1264 case Opt_hb_local:
1265 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1266 break;
1267 case Opt_hb_none:
1268 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1269 break;
1270 case Opt_hb_global:
1271 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1272 break;
1273 case Opt_barrier:
1274 if (match_int(&args[0], &option)) {
1275 status = 0;
1276 goto bail;
1277 }
1278 if (option)
1279 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1280 else
1281 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1282 break;
1283 case Opt_intr:
1284 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1285 break;
1286 case Opt_nointr:
1287 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1288 break;
1289 case Opt_err_panic:
1290 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1291 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1292 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1293 break;
1294 case Opt_err_ro:
1295 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1296 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1297 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1298 break;
1299 case Opt_err_cont:
1300 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1301 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1302 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1303 break;
1304 case Opt_data_ordered:
1305 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1306 break;
1307 case Opt_data_writeback:
1308 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1309 break;
1310 case Opt_user_xattr:
1311 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1312 break;
1313 case Opt_nouser_xattr:
1314 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1315 break;
1316 case Opt_atime_quantum:
1317 if (match_int(&args[0], &option)) {
1318 status = 0;
1319 goto bail;
1320 }
1321 if (option >= 0)
1322 mopt->atime_quantum = option;
1323 break;
1324 case Opt_slot:
1325 if (match_int(&args[0], &option)) {
1326 status = 0;
1327 goto bail;
1328 }
1329 if (option)
1330 mopt->slot = (u16)option;
1331 break;
1332 case Opt_commit:
1333 if (match_int(&args[0], &option)) {
1334 status = 0;
1335 goto bail;
1336 }
1337 if (option < 0)
1338 return 0;
1339 if (option == 0)
1340 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1341 mopt->commit_interval = HZ * option;
1342 break;
1343 case Opt_localalloc:
1344 if (match_int(&args[0], &option)) {
1345 status = 0;
1346 goto bail;
1347 }
1348 if (option >= 0)
1349 mopt->localalloc_opt = option;
1350 break;
1351 case Opt_localflocks:
1352 /*
1353 * Changing this during remount could race
1354 * flock() requests, or "unbalance" existing
1355 * ones (e.g., a lock is taken in one mode but
1356 * dropped in the other). If users care enough
1357 * to flip locking modes during remount, we
1358 * could add a "local" flag to individual
1359 * flock structures for proper tracking of
1360 * state.
1361 */
1362 if (!is_remount)
1363 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1364 break;
1365 case Opt_stack:
1366 /* Check both that the option we were passed
1367 * is of the right length and that it is a proper
1368 * string of the right length.
1369 */
1370 if (((args[0].to - args[0].from) !=
1371 OCFS2_STACK_LABEL_LEN) ||
1372 (strnlen(args[0].from,
1373 OCFS2_STACK_LABEL_LEN) !=
1374 OCFS2_STACK_LABEL_LEN)) {
1375 mlog(ML_ERROR,
1376 "Invalid cluster_stack option\n");
1377 status = 0;
1378 goto bail;
1379 }
1380 memcpy(mopt->cluster_stack, args[0].from,
1381 OCFS2_STACK_LABEL_LEN);
1382 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1383 /*
1384 * Open code the memcmp here as we don't have
1385 * an osb to pass to
1386 * ocfs2_userspace_stack().
1387 */
1388 if (memcmp(mopt->cluster_stack,
1389 OCFS2_CLASSIC_CLUSTER_STACK,
1390 OCFS2_STACK_LABEL_LEN))
1391 user_stack = 1;
1392 break;
1393 case Opt_inode64:
1394 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1395 break;
1396 case Opt_usrquota:
1397 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1398 break;
1399 case Opt_grpquota:
1400 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1401 break;
1402 case Opt_coherency_buffered:
1403 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1404 break;
1405 case Opt_coherency_full:
1406 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1407 break;
1408 case Opt_acl:
1409 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1410 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1411 break;
1412 case Opt_noacl:
1413 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1414 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1415 break;
1416 case Opt_resv_level:
1417 if (is_remount)
1418 break;
1419 if (match_int(&args[0], &option)) {
1420 status = 0;
1421 goto bail;
1422 }
1423 if (option >= OCFS2_MIN_RESV_LEVEL &&
1424 option < OCFS2_MAX_RESV_LEVEL)
1425 mopt->resv_level = option;
1426 break;
1427 case Opt_dir_resv_level:
1428 if (is_remount)
1429 break;
1430 if (match_int(&args[0], &option)) {
1431 status = 0;
1432 goto bail;
1433 }
1434 if (option >= OCFS2_MIN_RESV_LEVEL &&
1435 option < OCFS2_MAX_RESV_LEVEL)
1436 mopt->dir_resv_level = option;
1437 break;
1438 case Opt_journal_async_commit:
1439 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1440 break;
1441 default:
1442 mlog(ML_ERROR,
1443 "Unrecognized mount option \"%s\" "
1444 "or missing value\n", p);
1445 status = 0;
1446 goto bail;
1447 }
1448 }
1449
1450 if (user_stack == 0) {
1451 /* Ensure only one heartbeat mode */
1452 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1453 OCFS2_MOUNT_HB_GLOBAL |
1454 OCFS2_MOUNT_HB_NONE);
1455 if (hweight32(tmp) != 1) {
1456 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1457 status = 0;
1458 goto bail;
1459 }
1460 }
1461
1462 status = 1;
1463
1464bail:
1465 return status;
1466}
1467
1468static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1469{
1470 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1471 unsigned long opts = osb->s_mount_opt;
1472 unsigned int local_alloc_megs;
1473
1474 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1475 seq_printf(s, ",_netdev");
1476 if (opts & OCFS2_MOUNT_HB_LOCAL)
1477 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1478 else
1479 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1480 } else
1481 seq_printf(s, ",%s", OCFS2_HB_NONE);
1482
1483 if (opts & OCFS2_MOUNT_NOINTR)
1484 seq_printf(s, ",nointr");
1485
1486 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1487 seq_printf(s, ",data=writeback");
1488 else
1489 seq_printf(s, ",data=ordered");
1490
1491 if (opts & OCFS2_MOUNT_BARRIER)
1492 seq_printf(s, ",barrier=1");
1493
1494 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1495 seq_printf(s, ",errors=panic");
1496 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1497 seq_printf(s, ",errors=continue");
1498 else
1499 seq_printf(s, ",errors=remount-ro");
1500
1501 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1502 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1503
1504 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1505
1506 if (osb->osb_commit_interval)
1507 seq_printf(s, ",commit=%u",
1508 (unsigned) (osb->osb_commit_interval / HZ));
1509
1510 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1511 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1512 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1513
1514 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1515 seq_printf(s, ",localflocks,");
1516
1517 if (osb->osb_cluster_stack[0])
1518 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1519 OCFS2_STACK_LABEL_LEN);
1520 if (opts & OCFS2_MOUNT_USRQUOTA)
1521 seq_printf(s, ",usrquota");
1522 if (opts & OCFS2_MOUNT_GRPQUOTA)
1523 seq_printf(s, ",grpquota");
1524
1525 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1526 seq_printf(s, ",coherency=buffered");
1527 else
1528 seq_printf(s, ",coherency=full");
1529
1530 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1531 seq_printf(s, ",nouser_xattr");
1532 else
1533 seq_printf(s, ",user_xattr");
1534
1535 if (opts & OCFS2_MOUNT_INODE64)
1536 seq_printf(s, ",inode64");
1537
1538 if (opts & OCFS2_MOUNT_POSIX_ACL)
1539 seq_printf(s, ",acl");
1540 else
1541 seq_printf(s, ",noacl");
1542
1543 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1544 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1545
1546 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1547 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1548
1549 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1550 seq_printf(s, ",journal_async_commit");
1551
1552 return 0;
1553}
1554
1555static int __init ocfs2_init(void)
1556{
1557 int status;
1558
1559 status = init_ocfs2_uptodate_cache();
1560 if (status < 0)
1561 goto out1;
1562
1563 status = ocfs2_initialize_mem_caches();
1564 if (status < 0)
1565 goto out2;
1566
1567 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1568
1569 ocfs2_set_locking_protocol();
1570
1571 status = register_quota_format(&ocfs2_quota_format);
1572 if (status < 0)
1573 goto out3;
1574 status = register_filesystem(&ocfs2_fs_type);
1575 if (!status)
1576 return 0;
1577
1578 unregister_quota_format(&ocfs2_quota_format);
1579out3:
1580 debugfs_remove(ocfs2_debugfs_root);
1581 ocfs2_free_mem_caches();
1582out2:
1583 exit_ocfs2_uptodate_cache();
1584out1:
1585 mlog_errno(status);
1586 return status;
1587}
1588
1589static void __exit ocfs2_exit(void)
1590{
1591 unregister_quota_format(&ocfs2_quota_format);
1592
1593 debugfs_remove(ocfs2_debugfs_root);
1594
1595 ocfs2_free_mem_caches();
1596
1597 unregister_filesystem(&ocfs2_fs_type);
1598
1599 exit_ocfs2_uptodate_cache();
1600}
1601
1602static void ocfs2_put_super(struct super_block *sb)
1603{
1604 trace_ocfs2_put_super(sb);
1605
1606 ocfs2_sync_blockdev(sb);
1607 ocfs2_dismount_volume(sb, 0);
1608}
1609
1610static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1611{
1612 struct ocfs2_super *osb;
1613 u32 numbits, freebits;
1614 int status;
1615 struct ocfs2_dinode *bm_lock;
1616 struct buffer_head *bh = NULL;
1617 struct inode *inode = NULL;
1618
1619 trace_ocfs2_statfs(dentry->d_sb, buf);
1620
1621 osb = OCFS2_SB(dentry->d_sb);
1622
1623 inode = ocfs2_get_system_file_inode(osb,
1624 GLOBAL_BITMAP_SYSTEM_INODE,
1625 OCFS2_INVALID_SLOT);
1626 if (!inode) {
1627 mlog(ML_ERROR, "failed to get bitmap inode\n");
1628 status = -EIO;
1629 goto bail;
1630 }
1631
1632 status = ocfs2_inode_lock(inode, &bh, 0);
1633 if (status < 0) {
1634 mlog_errno(status);
1635 goto bail;
1636 }
1637
1638 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1639
1640 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1641 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1642
1643 buf->f_type = OCFS2_SUPER_MAGIC;
1644 buf->f_bsize = dentry->d_sb->s_blocksize;
1645 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1646 buf->f_blocks = ((sector_t) numbits) *
1647 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1648 buf->f_bfree = ((sector_t) freebits) *
1649 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1650 buf->f_bavail = buf->f_bfree;
1651 buf->f_files = numbits;
1652 buf->f_ffree = freebits;
1653 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1654 & 0xFFFFFFFFUL;
1655 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1656 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1657
1658 brelse(bh);
1659
1660 ocfs2_inode_unlock(inode, 0);
1661 status = 0;
1662bail:
1663 iput(inode);
1664
1665 if (status)
1666 mlog_errno(status);
1667
1668 return status;
1669}
1670
1671static void ocfs2_inode_init_once(void *data)
1672{
1673 struct ocfs2_inode_info *oi = data;
1674
1675 oi->ip_flags = 0;
1676 oi->ip_open_count = 0;
1677 spin_lock_init(&oi->ip_lock);
1678 ocfs2_extent_map_init(&oi->vfs_inode);
1679 INIT_LIST_HEAD(&oi->ip_io_markers);
1680 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1681 oi->ip_dir_start_lookup = 0;
1682 init_rwsem(&oi->ip_alloc_sem);
1683 init_rwsem(&oi->ip_xattr_sem);
1684 mutex_init(&oi->ip_io_mutex);
1685
1686 oi->ip_blkno = 0ULL;
1687 oi->ip_clusters = 0;
1688 oi->ip_next_orphan = NULL;
1689
1690 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1691
1692 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1693 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1694 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1695
1696 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1697 &ocfs2_inode_caching_ops);
1698
1699 inode_init_once(&oi->vfs_inode);
1700}
1701
1702static int ocfs2_initialize_mem_caches(void)
1703{
1704 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1705 sizeof(struct ocfs2_inode_info),
1706 0,
1707 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1708 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1709 ocfs2_inode_init_once);
1710 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1711 sizeof(struct ocfs2_dquot),
1712 0,
1713 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1714 SLAB_MEM_SPREAD),
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|SLAB_MEM_SPREAD),
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 memcpy(&sb->s_uuid, 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);