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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * super.c
6 *
7 * load/unload driver, mount/dismount volumes
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 */
11
12#include <linux/module.h>
13#include <linux/fs.h>
14#include <linux/types.h>
15#include <linux/slab.h>
16#include <linux/highmem.h>
17#include <linux/init.h>
18#include <linux/random.h>
19#include <linux/statfs.h>
20#include <linux/moduleparam.h>
21#include <linux/blkdev.h>
22#include <linux/socket.h>
23#include <linux/inet.h>
24#include <linux/parser.h>
25#include <linux/crc32.h>
26#include <linux/debugfs.h>
27#include <linux/mount.h>
28#include <linux/seq_file.h>
29#include <linux/quotaops.h>
30#include <linux/cleancache.h>
31#include <linux/signal.h>
32
33#define CREATE_TRACE_POINTS
34#include "ocfs2_trace.h"
35
36#include <cluster/masklog.h>
37
38#include "ocfs2.h"
39
40/* this should be the only file to include a version 1 header */
41#include "ocfs1_fs_compat.h"
42
43#include "alloc.h"
44#include "aops.h"
45#include "blockcheck.h"
46#include "dlmglue.h"
47#include "export.h"
48#include "extent_map.h"
49#include "heartbeat.h"
50#include "inode.h"
51#include "journal.h"
52#include "localalloc.h"
53#include "namei.h"
54#include "slot_map.h"
55#include "super.h"
56#include "sysfile.h"
57#include "uptodate.h"
58#include "xattr.h"
59#include "quota.h"
60#include "refcounttree.h"
61#include "suballoc.h"
62
63#include "buffer_head_io.h"
64#include "filecheck.h"
65
66static struct kmem_cache *ocfs2_inode_cachep;
67struct kmem_cache *ocfs2_dquot_cachep;
68struct kmem_cache *ocfs2_qf_chunk_cachep;
69
70static struct dentry *ocfs2_debugfs_root;
71
72MODULE_AUTHOR("Oracle");
73MODULE_LICENSE("GPL");
74MODULE_DESCRIPTION("OCFS2 cluster file system");
75
76struct mount_options
77{
78 unsigned long commit_interval;
79 unsigned long mount_opt;
80 unsigned int atime_quantum;
81 signed short slot;
82 int localalloc_opt;
83 unsigned int resv_level;
84 int dir_resv_level;
85 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
86};
87
88static int ocfs2_parse_options(struct super_block *sb, char *options,
89 struct mount_options *mopt,
90 int is_remount);
91static int ocfs2_check_set_options(struct super_block *sb,
92 struct mount_options *options);
93static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
94static void ocfs2_put_super(struct super_block *sb);
95static int ocfs2_mount_volume(struct super_block *sb);
96static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
97static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
98static int ocfs2_initialize_mem_caches(void);
99static void ocfs2_free_mem_caches(void);
100static void ocfs2_delete_osb(struct ocfs2_super *osb);
101
102static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
103
104static int ocfs2_sync_fs(struct super_block *sb, int wait);
105
106static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
107static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
108static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
109static int ocfs2_check_volume(struct ocfs2_super *osb);
110static int ocfs2_verify_volume(struct ocfs2_dinode *di,
111 struct buffer_head *bh,
112 u32 sectsize,
113 struct ocfs2_blockcheck_stats *stats);
114static int ocfs2_initialize_super(struct super_block *sb,
115 struct buffer_head *bh,
116 int sector_size,
117 struct ocfs2_blockcheck_stats *stats);
118static int ocfs2_get_sector(struct super_block *sb,
119 struct buffer_head **bh,
120 int block,
121 int sect_size);
122static struct inode *ocfs2_alloc_inode(struct super_block *sb);
123static void ocfs2_free_inode(struct inode *inode);
124static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
125static int ocfs2_enable_quotas(struct ocfs2_super *osb);
126static void ocfs2_disable_quotas(struct ocfs2_super *osb);
127
128static struct dquot **ocfs2_get_dquots(struct inode *inode)
129{
130 return OCFS2_I(inode)->i_dquot;
131}
132
133static const struct super_operations ocfs2_sops = {
134 .statfs = ocfs2_statfs,
135 .alloc_inode = ocfs2_alloc_inode,
136 .free_inode = ocfs2_free_inode,
137 .drop_inode = ocfs2_drop_inode,
138 .evict_inode = ocfs2_evict_inode,
139 .sync_fs = ocfs2_sync_fs,
140 .put_super = ocfs2_put_super,
141 .remount_fs = ocfs2_remount,
142 .show_options = ocfs2_show_options,
143 .quota_read = ocfs2_quota_read,
144 .quota_write = ocfs2_quota_write,
145 .get_dquots = ocfs2_get_dquots,
146};
147
148enum {
149 Opt_barrier,
150 Opt_err_panic,
151 Opt_err_ro,
152 Opt_intr,
153 Opt_nointr,
154 Opt_hb_none,
155 Opt_hb_local,
156 Opt_hb_global,
157 Opt_data_ordered,
158 Opt_data_writeback,
159 Opt_atime_quantum,
160 Opt_slot,
161 Opt_commit,
162 Opt_localalloc,
163 Opt_localflocks,
164 Opt_stack,
165 Opt_user_xattr,
166 Opt_nouser_xattr,
167 Opt_inode64,
168 Opt_acl,
169 Opt_noacl,
170 Opt_usrquota,
171 Opt_grpquota,
172 Opt_coherency_buffered,
173 Opt_coherency_full,
174 Opt_resv_level,
175 Opt_dir_resv_level,
176 Opt_journal_async_commit,
177 Opt_err_cont,
178 Opt_err,
179};
180
181static const match_table_t tokens = {
182 {Opt_barrier, "barrier=%u"},
183 {Opt_err_panic, "errors=panic"},
184 {Opt_err_ro, "errors=remount-ro"},
185 {Opt_intr, "intr"},
186 {Opt_nointr, "nointr"},
187 {Opt_hb_none, OCFS2_HB_NONE},
188 {Opt_hb_local, OCFS2_HB_LOCAL},
189 {Opt_hb_global, OCFS2_HB_GLOBAL},
190 {Opt_data_ordered, "data=ordered"},
191 {Opt_data_writeback, "data=writeback"},
192 {Opt_atime_quantum, "atime_quantum=%u"},
193 {Opt_slot, "preferred_slot=%u"},
194 {Opt_commit, "commit=%u"},
195 {Opt_localalloc, "localalloc=%d"},
196 {Opt_localflocks, "localflocks"},
197 {Opt_stack, "cluster_stack=%s"},
198 {Opt_user_xattr, "user_xattr"},
199 {Opt_nouser_xattr, "nouser_xattr"},
200 {Opt_inode64, "inode64"},
201 {Opt_acl, "acl"},
202 {Opt_noacl, "noacl"},
203 {Opt_usrquota, "usrquota"},
204 {Opt_grpquota, "grpquota"},
205 {Opt_coherency_buffered, "coherency=buffered"},
206 {Opt_coherency_full, "coherency=full"},
207 {Opt_resv_level, "resv_level=%u"},
208 {Opt_dir_resv_level, "dir_resv_level=%u"},
209 {Opt_journal_async_commit, "journal_async_commit"},
210 {Opt_err_cont, "errors=continue"},
211 {Opt_err, NULL}
212};
213
214#ifdef CONFIG_DEBUG_FS
215static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
216{
217 struct ocfs2_cluster_connection *cconn = osb->cconn;
218 struct ocfs2_recovery_map *rm = osb->recovery_map;
219 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
220 int i, out = 0;
221 unsigned long flags;
222
223 out += snprintf(buf + out, len - out,
224 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
225 "Device", osb->dev_str, osb->uuid_str,
226 osb->fs_generation, osb->vol_label);
227
228 out += snprintf(buf + out, len - out,
229 "%10s => State: %d Flags: 0x%lX\n", "Volume",
230 atomic_read(&osb->vol_state), osb->osb_flags);
231
232 out += snprintf(buf + out, len - out,
233 "%10s => Block: %lu Cluster: %d\n", "Sizes",
234 osb->sb->s_blocksize, osb->s_clustersize);
235
236 out += snprintf(buf + out, len - out,
237 "%10s => Compat: 0x%X Incompat: 0x%X "
238 "ROcompat: 0x%X\n",
239 "Features", osb->s_feature_compat,
240 osb->s_feature_incompat, osb->s_feature_ro_compat);
241
242 out += snprintf(buf + out, len - out,
243 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
244 osb->s_mount_opt, osb->s_atime_quantum);
245
246 if (cconn) {
247 out += snprintf(buf + out, len - out,
248 "%10s => Stack: %s Name: %*s "
249 "Version: %d.%d\n", "Cluster",
250 (*osb->osb_cluster_stack == '\0' ?
251 "o2cb" : osb->osb_cluster_stack),
252 cconn->cc_namelen, cconn->cc_name,
253 cconn->cc_version.pv_major,
254 cconn->cc_version.pv_minor);
255 }
256
257 spin_lock_irqsave(&osb->dc_task_lock, flags);
258 out += snprintf(buf + out, len - out,
259 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
260 "WorkSeq: %lu\n", "DownCnvt",
261 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
262 osb->blocked_lock_count, osb->dc_wake_sequence,
263 osb->dc_work_sequence);
264 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
265
266 spin_lock(&osb->osb_lock);
267 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
268 "Recovery",
269 (osb->recovery_thread_task ?
270 task_pid_nr(osb->recovery_thread_task) : -1));
271 if (rm->rm_used == 0)
272 out += snprintf(buf + out, len - out, " None\n");
273 else {
274 for (i = 0; i < rm->rm_used; i++)
275 out += snprintf(buf + out, len - out, " %d",
276 rm->rm_entries[i]);
277 out += snprintf(buf + out, len - out, "\n");
278 }
279 spin_unlock(&osb->osb_lock);
280
281 out += snprintf(buf + out, len - out,
282 "%10s => Pid: %d Interval: %lu\n", "Commit",
283 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
284 osb->osb_commit_interval);
285
286 out += snprintf(buf + out, len - out,
287 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
288 "Journal", osb->journal->j_state,
289 osb->journal->j_trans_id,
290 atomic_read(&osb->journal->j_num_trans));
291
292 out += snprintf(buf + out, len - out,
293 "%10s => GlobalAllocs: %d LocalAllocs: %d "
294 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
295 "Stats",
296 atomic_read(&osb->alloc_stats.bitmap_data),
297 atomic_read(&osb->alloc_stats.local_data),
298 atomic_read(&osb->alloc_stats.bg_allocs),
299 atomic_read(&osb->alloc_stats.moves),
300 atomic_read(&osb->alloc_stats.bg_extends));
301
302 out += snprintf(buf + out, len - out,
303 "%10s => State: %u Descriptor: %llu Size: %u bits "
304 "Default: %u bits\n",
305 "LocalAlloc", osb->local_alloc_state,
306 (unsigned long long)osb->la_last_gd,
307 osb->local_alloc_bits, osb->local_alloc_default_bits);
308
309 spin_lock(&osb->osb_lock);
310 out += snprintf(buf + out, len - out,
311 "%10s => InodeSlot: %d StolenInodes: %d, "
312 "MetaSlot: %d StolenMeta: %d\n", "Steal",
313 osb->s_inode_steal_slot,
314 atomic_read(&osb->s_num_inodes_stolen),
315 osb->s_meta_steal_slot,
316 atomic_read(&osb->s_num_meta_stolen));
317 spin_unlock(&osb->osb_lock);
318
319 out += snprintf(buf + out, len - out, "OrphanScan => ");
320 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
321 os->os_count, os->os_seqno);
322 out += snprintf(buf + out, len - out, " Last Scan: ");
323 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
324 out += snprintf(buf + out, len - out, "Disabled\n");
325 else
326 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
327 (unsigned long)(ktime_get_seconds() - os->os_scantime));
328
329 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
330 "Slots", "Num", "RecoGen");
331 for (i = 0; i < osb->max_slots; ++i) {
332 out += snprintf(buf + out, len - out,
333 "%10s %c %3d %10d\n",
334 " ",
335 (i == osb->slot_num ? '*' : ' '),
336 i, osb->slot_recovery_generations[i]);
337 }
338
339 return out;
340}
341
342static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
343{
344 struct ocfs2_super *osb = inode->i_private;
345 char *buf = NULL;
346
347 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
348 if (!buf)
349 goto bail;
350
351 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
352
353 file->private_data = buf;
354
355 return 0;
356bail:
357 return -ENOMEM;
358}
359
360static int ocfs2_debug_release(struct inode *inode, struct file *file)
361{
362 kfree(file->private_data);
363 return 0;
364}
365
366static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
367 size_t nbytes, loff_t *ppos)
368{
369 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
370 i_size_read(file->f_mapping->host));
371}
372#else
373static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
374{
375 return 0;
376}
377static int ocfs2_debug_release(struct inode *inode, struct file *file)
378{
379 return 0;
380}
381static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382 size_t nbytes, loff_t *ppos)
383{
384 return 0;
385}
386#endif /* CONFIG_DEBUG_FS */
387
388static const struct file_operations ocfs2_osb_debug_fops = {
389 .open = ocfs2_osb_debug_open,
390 .release = ocfs2_debug_release,
391 .read = ocfs2_debug_read,
392 .llseek = generic_file_llseek,
393};
394
395static int ocfs2_sync_fs(struct super_block *sb, int wait)
396{
397 int status;
398 tid_t target;
399 struct ocfs2_super *osb = OCFS2_SB(sb);
400
401 if (ocfs2_is_hard_readonly(osb))
402 return -EROFS;
403
404 if (wait) {
405 status = ocfs2_flush_truncate_log(osb);
406 if (status < 0)
407 mlog_errno(status);
408 } else {
409 ocfs2_schedule_truncate_log_flush(osb, 0);
410 }
411
412 if (jbd2_journal_start_commit(osb->journal->j_journal,
413 &target)) {
414 if (wait)
415 jbd2_log_wait_commit(osb->journal->j_journal,
416 target);
417 }
418 return 0;
419}
420
421static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
422{
423 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
424 && (ino == USER_QUOTA_SYSTEM_INODE
425 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
426 return 0;
427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
428 && (ino == GROUP_QUOTA_SYSTEM_INODE
429 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
430 return 0;
431 return 1;
432}
433
434static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
435{
436 struct inode *new = NULL;
437 int status = 0;
438 int i;
439
440 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
441 if (IS_ERR(new)) {
442 status = PTR_ERR(new);
443 mlog_errno(status);
444 goto bail;
445 }
446 osb->root_inode = new;
447
448 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->sys_root_inode = new;
455
456 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
457 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
458 if (!ocfs2_need_system_inode(osb, i))
459 continue;
460 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
461 if (!new) {
462 ocfs2_release_system_inodes(osb);
463 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
464 mlog_errno(status);
465 mlog(ML_ERROR, "Unable to load system inode %d, "
466 "possibly corrupt fs?", i);
467 goto bail;
468 }
469 // the array now has one ref, so drop this one
470 iput(new);
471 }
472
473bail:
474 if (status)
475 mlog_errno(status);
476 return status;
477}
478
479static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
480{
481 struct inode *new = NULL;
482 int status = 0;
483 int i;
484
485 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
486 i < NUM_SYSTEM_INODES;
487 i++) {
488 if (!ocfs2_need_system_inode(osb, i))
489 continue;
490 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
491 if (!new) {
492 ocfs2_release_system_inodes(osb);
493 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
494 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
495 status, i, osb->slot_num);
496 goto bail;
497 }
498 /* the array now has one ref, so drop this one */
499 iput(new);
500 }
501
502bail:
503 if (status)
504 mlog_errno(status);
505 return status;
506}
507
508static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
509{
510 int i;
511 struct inode *inode;
512
513 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
514 inode = osb->global_system_inodes[i];
515 if (inode) {
516 iput(inode);
517 osb->global_system_inodes[i] = NULL;
518 }
519 }
520
521 inode = osb->sys_root_inode;
522 if (inode) {
523 iput(inode);
524 osb->sys_root_inode = NULL;
525 }
526
527 inode = osb->root_inode;
528 if (inode) {
529 iput(inode);
530 osb->root_inode = NULL;
531 }
532
533 if (!osb->local_system_inodes)
534 return;
535
536 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
537 if (osb->local_system_inodes[i]) {
538 iput(osb->local_system_inodes[i]);
539 osb->local_system_inodes[i] = NULL;
540 }
541 }
542
543 kfree(osb->local_system_inodes);
544 osb->local_system_inodes = NULL;
545}
546
547/* We're allocating fs objects, use GFP_NOFS */
548static struct inode *ocfs2_alloc_inode(struct super_block *sb)
549{
550 struct ocfs2_inode_info *oi;
551
552 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
553 if (!oi)
554 return NULL;
555
556 oi->i_sync_tid = 0;
557 oi->i_datasync_tid = 0;
558 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
559
560 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
561 return &oi->vfs_inode;
562}
563
564static void ocfs2_free_inode(struct inode *inode)
565{
566 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
567}
568
569static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
570 unsigned int cbits)
571{
572 unsigned int bytes = 1 << cbits;
573 unsigned int trim = bytes;
574 unsigned int bitshift = 32;
575
576 /*
577 * i_size and all block offsets in ocfs2 are always 64 bits
578 * wide. i_clusters is 32 bits, in cluster-sized units. So on
579 * 64 bit platforms, cluster size will be the limiting factor.
580 */
581
582#if BITS_PER_LONG == 32
583 BUILD_BUG_ON(sizeof(sector_t) != 8);
584 /*
585 * We might be limited by page cache size.
586 */
587 if (bytes > PAGE_SIZE) {
588 bytes = PAGE_SIZE;
589 trim = 1;
590 /*
591 * Shift by 31 here so that we don't get larger than
592 * MAX_LFS_FILESIZE
593 */
594 bitshift = 31;
595 }
596#endif
597
598 /*
599 * Trim by a whole cluster when we can actually approach the
600 * on-disk limits. Otherwise we can overflow i_clusters when
601 * an extent start is at the max offset.
602 */
603 return (((unsigned long long)bytes) << bitshift) - trim;
604}
605
606static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
607{
608 int incompat_features;
609 int ret = 0;
610 struct mount_options parsed_options;
611 struct ocfs2_super *osb = OCFS2_SB(sb);
612 u32 tmp;
613
614 sync_filesystem(sb);
615
616 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
617 !ocfs2_check_set_options(sb, &parsed_options)) {
618 ret = -EINVAL;
619 goto out;
620 }
621
622 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
623 OCFS2_MOUNT_HB_NONE;
624 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
625 ret = -EINVAL;
626 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
627 goto out;
628 }
629
630 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
631 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
632 ret = -EINVAL;
633 mlog(ML_ERROR, "Cannot change data mode on remount\n");
634 goto out;
635 }
636
637 /* Probably don't want this on remount; it might
638 * mess with other nodes */
639 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
640 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
641 ret = -EINVAL;
642 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
643 goto out;
644 }
645
646 /* We're going to/from readonly mode. */
647 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
648 /* Disable quota accounting before remounting RO */
649 if (*flags & SB_RDONLY) {
650 ret = ocfs2_susp_quotas(osb, 0);
651 if (ret < 0)
652 goto out;
653 }
654 /* Lock here so the check of HARD_RO and the potential
655 * setting of SOFT_RO is atomic. */
656 spin_lock(&osb->osb_lock);
657 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
658 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
659 ret = -EROFS;
660 goto unlock_osb;
661 }
662
663 if (*flags & SB_RDONLY) {
664 sb->s_flags |= SB_RDONLY;
665 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
666 } else {
667 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
668 mlog(ML_ERROR, "Cannot remount RDWR "
669 "filesystem due to previous errors.\n");
670 ret = -EROFS;
671 goto unlock_osb;
672 }
673 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
674 if (incompat_features) {
675 mlog(ML_ERROR, "Cannot remount RDWR because "
676 "of unsupported optional features "
677 "(%x).\n", incompat_features);
678 ret = -EINVAL;
679 goto unlock_osb;
680 }
681 sb->s_flags &= ~SB_RDONLY;
682 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
683 }
684 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
685unlock_osb:
686 spin_unlock(&osb->osb_lock);
687 /* Enable quota accounting after remounting RW */
688 if (!ret && !(*flags & SB_RDONLY)) {
689 if (sb_any_quota_suspended(sb))
690 ret = ocfs2_susp_quotas(osb, 1);
691 else
692 ret = ocfs2_enable_quotas(osb);
693 if (ret < 0) {
694 /* Return back changes... */
695 spin_lock(&osb->osb_lock);
696 sb->s_flags |= SB_RDONLY;
697 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
698 spin_unlock(&osb->osb_lock);
699 goto out;
700 }
701 }
702 }
703
704 if (!ret) {
705 /* Only save off the new mount options in case of a successful
706 * remount. */
707 osb->s_mount_opt = parsed_options.mount_opt;
708 osb->s_atime_quantum = parsed_options.atime_quantum;
709 osb->preferred_slot = parsed_options.slot;
710 if (parsed_options.commit_interval)
711 osb->osb_commit_interval = parsed_options.commit_interval;
712
713 if (!ocfs2_is_hard_readonly(osb))
714 ocfs2_set_journal_params(osb);
715
716 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
717 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
718 SB_POSIXACL : 0);
719 }
720out:
721 return ret;
722}
723
724static int ocfs2_sb_probe(struct super_block *sb,
725 struct buffer_head **bh,
726 int *sector_size,
727 struct ocfs2_blockcheck_stats *stats)
728{
729 int status, tmpstat;
730 struct ocfs1_vol_disk_hdr *hdr;
731 struct ocfs2_dinode *di;
732 int blksize;
733
734 *bh = NULL;
735
736 /* may be > 512 */
737 *sector_size = bdev_logical_block_size(sb->s_bdev);
738 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
739 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
740 *sector_size, OCFS2_MAX_BLOCKSIZE);
741 status = -EINVAL;
742 goto bail;
743 }
744
745 /* Can this really happen? */
746 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
747 *sector_size = OCFS2_MIN_BLOCKSIZE;
748
749 /* check block zero for old format */
750 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
751 if (status < 0) {
752 mlog_errno(status);
753 goto bail;
754 }
755 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
756 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
757 mlog(ML_ERROR, "incompatible version: %u.%u\n",
758 hdr->major_version, hdr->minor_version);
759 status = -EINVAL;
760 }
761 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
762 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
763 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
764 hdr->signature);
765 status = -EINVAL;
766 }
767 brelse(*bh);
768 *bh = NULL;
769 if (status < 0) {
770 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
771 "upgraded before mounting with ocfs v2\n");
772 goto bail;
773 }
774
775 /*
776 * Now check at magic offset for 512, 1024, 2048, 4096
777 * blocksizes. 4096 is the maximum blocksize because it is
778 * the minimum clustersize.
779 */
780 status = -EINVAL;
781 for (blksize = *sector_size;
782 blksize <= OCFS2_MAX_BLOCKSIZE;
783 blksize <<= 1) {
784 tmpstat = ocfs2_get_sector(sb, bh,
785 OCFS2_SUPER_BLOCK_BLKNO,
786 blksize);
787 if (tmpstat < 0) {
788 status = tmpstat;
789 mlog_errno(status);
790 break;
791 }
792 di = (struct ocfs2_dinode *) (*bh)->b_data;
793 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
794 spin_lock_init(&stats->b_lock);
795 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
796 if (tmpstat < 0) {
797 brelse(*bh);
798 *bh = NULL;
799 }
800 if (tmpstat != -EAGAIN) {
801 status = tmpstat;
802 break;
803 }
804 }
805
806bail:
807 return status;
808}
809
810static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
811{
812 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
813
814 if (osb->s_mount_opt & hb_enabled) {
815 if (ocfs2_mount_local(osb)) {
816 mlog(ML_ERROR, "Cannot heartbeat on a locally "
817 "mounted device.\n");
818 return -EINVAL;
819 }
820 if (ocfs2_userspace_stack(osb)) {
821 mlog(ML_ERROR, "Userspace stack expected, but "
822 "o2cb heartbeat arguments passed to mount\n");
823 return -EINVAL;
824 }
825 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
826 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
827 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
828 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
829 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
830 return -EINVAL;
831 }
832 }
833
834 if (!(osb->s_mount_opt & hb_enabled)) {
835 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
836 !ocfs2_userspace_stack(osb)) {
837 mlog(ML_ERROR, "Heartbeat has to be started to mount "
838 "a read-write clustered device.\n");
839 return -EINVAL;
840 }
841 }
842
843 return 0;
844}
845
846/*
847 * If we're using a userspace stack, mount should have passed
848 * a name that matches the disk. If not, mount should not
849 * have passed a stack.
850 */
851static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
852 struct mount_options *mopt)
853{
854 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
855 mlog(ML_ERROR,
856 "cluster stack passed to mount, but this filesystem "
857 "does not support it\n");
858 return -EINVAL;
859 }
860
861 if (ocfs2_userspace_stack(osb) &&
862 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
863 OCFS2_STACK_LABEL_LEN)) {
864 mlog(ML_ERROR,
865 "cluster stack passed to mount (\"%s\") does not "
866 "match the filesystem (\"%s\")\n",
867 mopt->cluster_stack,
868 osb->osb_cluster_stack);
869 return -EINVAL;
870 }
871
872 return 0;
873}
874
875static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
876{
877 int type;
878 struct super_block *sb = osb->sb;
879 unsigned int feature[OCFS2_MAXQUOTAS] = {
880 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
881 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
882 int status = 0;
883
884 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
885 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
886 continue;
887 if (unsuspend)
888 status = dquot_resume(sb, type);
889 else {
890 struct ocfs2_mem_dqinfo *oinfo;
891
892 /* Cancel periodic syncing before suspending */
893 oinfo = sb_dqinfo(sb, type)->dqi_priv;
894 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
895 status = dquot_suspend(sb, type);
896 }
897 if (status < 0)
898 break;
899 }
900 if (status < 0)
901 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
902 "remount (error = %d).\n", status);
903 return status;
904}
905
906static int ocfs2_enable_quotas(struct ocfs2_super *osb)
907{
908 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
909 struct super_block *sb = osb->sb;
910 unsigned int feature[OCFS2_MAXQUOTAS] = {
911 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
912 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
913 unsigned int ino[OCFS2_MAXQUOTAS] = {
914 LOCAL_USER_QUOTA_SYSTEM_INODE,
915 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
916 int status;
917 int type;
918
919 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
920 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
921 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
922 continue;
923 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
924 osb->slot_num);
925 if (!inode[type]) {
926 status = -ENOENT;
927 goto out_quota_off;
928 }
929 status = dquot_enable(inode[type], type, QFMT_OCFS2,
930 DQUOT_USAGE_ENABLED);
931 if (status < 0)
932 goto out_quota_off;
933 }
934
935 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
936 iput(inode[type]);
937 return 0;
938out_quota_off:
939 ocfs2_disable_quotas(osb);
940 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
941 iput(inode[type]);
942 mlog_errno(status);
943 return status;
944}
945
946static void ocfs2_disable_quotas(struct ocfs2_super *osb)
947{
948 int type;
949 struct inode *inode;
950 struct super_block *sb = osb->sb;
951 struct ocfs2_mem_dqinfo *oinfo;
952
953 /* We mostly ignore errors in this function because there's not much
954 * we can do when we see them */
955 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
956 if (!sb_has_quota_loaded(sb, type))
957 continue;
958 oinfo = sb_dqinfo(sb, type)->dqi_priv;
959 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
960 inode = igrab(sb->s_dquot.files[type]);
961 /* Turn off quotas. This will remove all dquot structures from
962 * memory and so they will be automatically synced to global
963 * quota files */
964 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
965 DQUOT_LIMITS_ENABLED);
966 if (!inode)
967 continue;
968 iput(inode);
969 }
970}
971
972static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
973{
974 struct dentry *root;
975 int status, sector_size;
976 struct mount_options parsed_options;
977 struct inode *inode = NULL;
978 struct ocfs2_super *osb = NULL;
979 struct buffer_head *bh = NULL;
980 char nodestr[12];
981 struct ocfs2_blockcheck_stats stats;
982
983 trace_ocfs2_fill_super(sb, data, silent);
984
985 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
986 status = -EINVAL;
987 goto read_super_error;
988 }
989
990 /* probe for superblock */
991 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
992 if (status < 0) {
993 mlog(ML_ERROR, "superblock probe failed!\n");
994 goto read_super_error;
995 }
996
997 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
998 osb = OCFS2_SB(sb);
999 if (status < 0) {
1000 mlog_errno(status);
1001 goto read_super_error;
1002 }
1003 brelse(bh);
1004 bh = NULL;
1005
1006 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1007 status = -EINVAL;
1008 goto read_super_error;
1009 }
1010 osb->s_mount_opt = parsed_options.mount_opt;
1011 osb->s_atime_quantum = parsed_options.atime_quantum;
1012 osb->preferred_slot = parsed_options.slot;
1013 osb->osb_commit_interval = parsed_options.commit_interval;
1014
1015 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1016 osb->osb_resv_level = parsed_options.resv_level;
1017 osb->osb_dir_resv_level = parsed_options.resv_level;
1018 if (parsed_options.dir_resv_level == -1)
1019 osb->osb_dir_resv_level = parsed_options.resv_level;
1020 else
1021 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1022
1023 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1024 if (status)
1025 goto read_super_error;
1026
1027 sb->s_magic = OCFS2_SUPER_MAGIC;
1028
1029 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1030 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1031
1032 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1033 * heartbeat=none */
1034 if (bdev_read_only(sb->s_bdev)) {
1035 if (!sb_rdonly(sb)) {
1036 status = -EACCES;
1037 mlog(ML_ERROR, "Readonly device detected but readonly "
1038 "mount was not specified.\n");
1039 goto read_super_error;
1040 }
1041
1042 /* You should not be able to start a local heartbeat
1043 * on a readonly device. */
1044 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1045 status = -EROFS;
1046 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1047 "device.\n");
1048 goto read_super_error;
1049 }
1050
1051 status = ocfs2_check_journals_nolocks(osb);
1052 if (status < 0) {
1053 if (status == -EROFS)
1054 mlog(ML_ERROR, "Recovery required on readonly "
1055 "file system, but write access is "
1056 "unavailable.\n");
1057 else
1058 mlog_errno(status);
1059 goto read_super_error;
1060 }
1061
1062 ocfs2_set_ro_flag(osb, 1);
1063
1064 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1065 "Cluster services will not be used for this mount. "
1066 "Recovery will be skipped.\n", osb->dev_str);
1067 }
1068
1069 if (!ocfs2_is_hard_readonly(osb)) {
1070 if (sb_rdonly(sb))
1071 ocfs2_set_ro_flag(osb, 0);
1072 }
1073
1074 status = ocfs2_verify_heartbeat(osb);
1075 if (status < 0) {
1076 mlog_errno(status);
1077 goto read_super_error;
1078 }
1079
1080 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1081 ocfs2_debugfs_root);
1082
1083 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1084 osb, &ocfs2_osb_debug_fops);
1085
1086 if (ocfs2_meta_ecc(osb))
1087 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1088 osb->osb_debug_root);
1089
1090 status = ocfs2_mount_volume(sb);
1091 if (status < 0)
1092 goto read_super_error;
1093
1094 if (osb->root_inode)
1095 inode = igrab(osb->root_inode);
1096
1097 if (!inode) {
1098 status = -EIO;
1099 mlog_errno(status);
1100 goto read_super_error;
1101 }
1102
1103 root = d_make_root(inode);
1104 if (!root) {
1105 status = -ENOMEM;
1106 mlog_errno(status);
1107 goto read_super_error;
1108 }
1109
1110 sb->s_root = root;
1111
1112 ocfs2_complete_mount_recovery(osb);
1113
1114 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1115 &ocfs2_kset->kobj);
1116 if (!osb->osb_dev_kset) {
1117 status = -ENOMEM;
1118 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1119 goto read_super_error;
1120 }
1121
1122 /* Create filecheck sysfs related directories/files at
1123 * /sys/fs/ocfs2/<devname>/filecheck */
1124 if (ocfs2_filecheck_create_sysfs(osb)) {
1125 status = -ENOMEM;
1126 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1127 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1128 goto read_super_error;
1129 }
1130
1131 if (ocfs2_mount_local(osb))
1132 snprintf(nodestr, sizeof(nodestr), "local");
1133 else
1134 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1135
1136 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1137 "with %s data mode.\n",
1138 osb->dev_str, nodestr, osb->slot_num,
1139 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1140 "ordered");
1141
1142 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1143 wake_up(&osb->osb_mount_event);
1144
1145 /* Now we can initialize quotas because we can afford to wait
1146 * for cluster locks recovery now. That also means that truncation
1147 * log recovery can happen but that waits for proper quota setup */
1148 if (!sb_rdonly(sb)) {
1149 status = ocfs2_enable_quotas(osb);
1150 if (status < 0) {
1151 /* We have to err-out specially here because
1152 * s_root is already set */
1153 mlog_errno(status);
1154 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1155 wake_up(&osb->osb_mount_event);
1156 return status;
1157 }
1158 }
1159
1160 ocfs2_complete_quota_recovery(osb);
1161
1162 /* Now we wake up again for processes waiting for quotas */
1163 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1164 wake_up(&osb->osb_mount_event);
1165
1166 /* Start this when the mount is almost sure of being successful */
1167 ocfs2_orphan_scan_start(osb);
1168
1169 return status;
1170
1171read_super_error:
1172 brelse(bh);
1173
1174 if (status)
1175 mlog_errno(status);
1176
1177 if (osb) {
1178 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1179 wake_up(&osb->osb_mount_event);
1180 ocfs2_dismount_volume(sb, 1);
1181 }
1182
1183 return status;
1184}
1185
1186static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1187 int flags,
1188 const char *dev_name,
1189 void *data)
1190{
1191 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1192}
1193
1194static struct file_system_type ocfs2_fs_type = {
1195 .owner = THIS_MODULE,
1196 .name = "ocfs2",
1197 .mount = ocfs2_mount,
1198 .kill_sb = kill_block_super,
1199 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1200 .next = NULL
1201};
1202MODULE_ALIAS_FS("ocfs2");
1203
1204static int ocfs2_check_set_options(struct super_block *sb,
1205 struct mount_options *options)
1206{
1207 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1208 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1209 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1210 mlog(ML_ERROR, "User quotas were requested, but this "
1211 "filesystem does not have the feature enabled.\n");
1212 return 0;
1213 }
1214 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1215 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1216 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1217 mlog(ML_ERROR, "Group quotas were requested, but this "
1218 "filesystem does not have the feature enabled.\n");
1219 return 0;
1220 }
1221 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1222 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1223 mlog(ML_ERROR, "ACL support requested but extended attributes "
1224 "feature is not enabled\n");
1225 return 0;
1226 }
1227 /* No ACL setting specified? Use XATTR feature... */
1228 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1229 OCFS2_MOUNT_NO_POSIX_ACL))) {
1230 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1231 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1232 else
1233 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1234 }
1235 return 1;
1236}
1237
1238static int ocfs2_parse_options(struct super_block *sb,
1239 char *options,
1240 struct mount_options *mopt,
1241 int is_remount)
1242{
1243 int status, user_stack = 0;
1244 char *p;
1245 u32 tmp;
1246 int token, option;
1247 substring_t args[MAX_OPT_ARGS];
1248
1249 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1250
1251 mopt->commit_interval = 0;
1252 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1253 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1254 mopt->slot = OCFS2_INVALID_SLOT;
1255 mopt->localalloc_opt = -1;
1256 mopt->cluster_stack[0] = '\0';
1257 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1258 mopt->dir_resv_level = -1;
1259
1260 if (!options) {
1261 status = 1;
1262 goto bail;
1263 }
1264
1265 while ((p = strsep(&options, ",")) != NULL) {
1266 if (!*p)
1267 continue;
1268
1269 token = match_token(p, tokens, args);
1270 switch (token) {
1271 case Opt_hb_local:
1272 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1273 break;
1274 case Opt_hb_none:
1275 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1276 break;
1277 case Opt_hb_global:
1278 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1279 break;
1280 case Opt_barrier:
1281 if (match_int(&args[0], &option)) {
1282 status = 0;
1283 goto bail;
1284 }
1285 if (option)
1286 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1287 else
1288 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1289 break;
1290 case Opt_intr:
1291 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1292 break;
1293 case Opt_nointr:
1294 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1295 break;
1296 case Opt_err_panic:
1297 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1298 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1299 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1300 break;
1301 case Opt_err_ro:
1302 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1303 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1304 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1305 break;
1306 case Opt_err_cont:
1307 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1308 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1309 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1310 break;
1311 case Opt_data_ordered:
1312 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1313 break;
1314 case Opt_data_writeback:
1315 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1316 break;
1317 case Opt_user_xattr:
1318 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1319 break;
1320 case Opt_nouser_xattr:
1321 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1322 break;
1323 case Opt_atime_quantum:
1324 if (match_int(&args[0], &option)) {
1325 status = 0;
1326 goto bail;
1327 }
1328 if (option >= 0)
1329 mopt->atime_quantum = option;
1330 break;
1331 case Opt_slot:
1332 if (match_int(&args[0], &option)) {
1333 status = 0;
1334 goto bail;
1335 }
1336 if (option)
1337 mopt->slot = (s16)option;
1338 break;
1339 case Opt_commit:
1340 if (match_int(&args[0], &option)) {
1341 status = 0;
1342 goto bail;
1343 }
1344 if (option < 0)
1345 return 0;
1346 if (option == 0)
1347 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1348 mopt->commit_interval = HZ * option;
1349 break;
1350 case Opt_localalloc:
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option >= 0)
1356 mopt->localalloc_opt = option;
1357 break;
1358 case Opt_localflocks:
1359 /*
1360 * Changing this during remount could race
1361 * flock() requests, or "unbalance" existing
1362 * ones (e.g., a lock is taken in one mode but
1363 * dropped in the other). If users care enough
1364 * to flip locking modes during remount, we
1365 * could add a "local" flag to individual
1366 * flock structures for proper tracking of
1367 * state.
1368 */
1369 if (!is_remount)
1370 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1371 break;
1372 case Opt_stack:
1373 /* Check both that the option we were passed
1374 * is of the right length and that it is a proper
1375 * string of the right length.
1376 */
1377 if (((args[0].to - args[0].from) !=
1378 OCFS2_STACK_LABEL_LEN) ||
1379 (strnlen(args[0].from,
1380 OCFS2_STACK_LABEL_LEN) !=
1381 OCFS2_STACK_LABEL_LEN)) {
1382 mlog(ML_ERROR,
1383 "Invalid cluster_stack option\n");
1384 status = 0;
1385 goto bail;
1386 }
1387 memcpy(mopt->cluster_stack, args[0].from,
1388 OCFS2_STACK_LABEL_LEN);
1389 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1390 /*
1391 * Open code the memcmp here as we don't have
1392 * an osb to pass to
1393 * ocfs2_userspace_stack().
1394 */
1395 if (memcmp(mopt->cluster_stack,
1396 OCFS2_CLASSIC_CLUSTER_STACK,
1397 OCFS2_STACK_LABEL_LEN))
1398 user_stack = 1;
1399 break;
1400 case Opt_inode64:
1401 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1402 break;
1403 case Opt_usrquota:
1404 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1405 break;
1406 case Opt_grpquota:
1407 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1408 break;
1409 case Opt_coherency_buffered:
1410 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1411 break;
1412 case Opt_coherency_full:
1413 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1414 break;
1415 case Opt_acl:
1416 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1417 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1418 break;
1419 case Opt_noacl:
1420 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1421 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1422 break;
1423 case Opt_resv_level:
1424 if (is_remount)
1425 break;
1426 if (match_int(&args[0], &option)) {
1427 status = 0;
1428 goto bail;
1429 }
1430 if (option >= OCFS2_MIN_RESV_LEVEL &&
1431 option < OCFS2_MAX_RESV_LEVEL)
1432 mopt->resv_level = option;
1433 break;
1434 case Opt_dir_resv_level:
1435 if (is_remount)
1436 break;
1437 if (match_int(&args[0], &option)) {
1438 status = 0;
1439 goto bail;
1440 }
1441 if (option >= OCFS2_MIN_RESV_LEVEL &&
1442 option < OCFS2_MAX_RESV_LEVEL)
1443 mopt->dir_resv_level = option;
1444 break;
1445 case Opt_journal_async_commit:
1446 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1447 break;
1448 default:
1449 mlog(ML_ERROR,
1450 "Unrecognized mount option \"%s\" "
1451 "or missing value\n", p);
1452 status = 0;
1453 goto bail;
1454 }
1455 }
1456
1457 if (user_stack == 0) {
1458 /* Ensure only one heartbeat mode */
1459 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1460 OCFS2_MOUNT_HB_GLOBAL |
1461 OCFS2_MOUNT_HB_NONE);
1462 if (hweight32(tmp) != 1) {
1463 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1464 status = 0;
1465 goto bail;
1466 }
1467 }
1468
1469 status = 1;
1470
1471bail:
1472 return status;
1473}
1474
1475static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1476{
1477 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1478 unsigned long opts = osb->s_mount_opt;
1479 unsigned int local_alloc_megs;
1480
1481 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1482 seq_printf(s, ",_netdev");
1483 if (opts & OCFS2_MOUNT_HB_LOCAL)
1484 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1485 else
1486 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1487 } else
1488 seq_printf(s, ",%s", OCFS2_HB_NONE);
1489
1490 if (opts & OCFS2_MOUNT_NOINTR)
1491 seq_printf(s, ",nointr");
1492
1493 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1494 seq_printf(s, ",data=writeback");
1495 else
1496 seq_printf(s, ",data=ordered");
1497
1498 if (opts & OCFS2_MOUNT_BARRIER)
1499 seq_printf(s, ",barrier=1");
1500
1501 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1502 seq_printf(s, ",errors=panic");
1503 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1504 seq_printf(s, ",errors=continue");
1505 else
1506 seq_printf(s, ",errors=remount-ro");
1507
1508 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1509 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1510
1511 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1512
1513 if (osb->osb_commit_interval)
1514 seq_printf(s, ",commit=%u",
1515 (unsigned) (osb->osb_commit_interval / HZ));
1516
1517 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1518 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1519 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1520
1521 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1522 seq_printf(s, ",localflocks,");
1523
1524 if (osb->osb_cluster_stack[0])
1525 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1526 OCFS2_STACK_LABEL_LEN);
1527 if (opts & OCFS2_MOUNT_USRQUOTA)
1528 seq_printf(s, ",usrquota");
1529 if (opts & OCFS2_MOUNT_GRPQUOTA)
1530 seq_printf(s, ",grpquota");
1531
1532 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1533 seq_printf(s, ",coherency=buffered");
1534 else
1535 seq_printf(s, ",coherency=full");
1536
1537 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1538 seq_printf(s, ",nouser_xattr");
1539 else
1540 seq_printf(s, ",user_xattr");
1541
1542 if (opts & OCFS2_MOUNT_INODE64)
1543 seq_printf(s, ",inode64");
1544
1545 if (opts & OCFS2_MOUNT_POSIX_ACL)
1546 seq_printf(s, ",acl");
1547 else
1548 seq_printf(s, ",noacl");
1549
1550 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1551 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1552
1553 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1554 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1555
1556 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1557 seq_printf(s, ",journal_async_commit");
1558
1559 return 0;
1560}
1561
1562static int __init ocfs2_init(void)
1563{
1564 int status;
1565
1566 status = init_ocfs2_uptodate_cache();
1567 if (status < 0)
1568 goto out1;
1569
1570 status = ocfs2_initialize_mem_caches();
1571 if (status < 0)
1572 goto out2;
1573
1574 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1575
1576 ocfs2_set_locking_protocol();
1577
1578 status = register_quota_format(&ocfs2_quota_format);
1579 if (status < 0)
1580 goto out3;
1581 status = register_filesystem(&ocfs2_fs_type);
1582 if (!status)
1583 return 0;
1584
1585 unregister_quota_format(&ocfs2_quota_format);
1586out3:
1587 debugfs_remove(ocfs2_debugfs_root);
1588 ocfs2_free_mem_caches();
1589out2:
1590 exit_ocfs2_uptodate_cache();
1591out1:
1592 mlog_errno(status);
1593 return status;
1594}
1595
1596static void __exit ocfs2_exit(void)
1597{
1598 unregister_quota_format(&ocfs2_quota_format);
1599
1600 debugfs_remove(ocfs2_debugfs_root);
1601
1602 ocfs2_free_mem_caches();
1603
1604 unregister_filesystem(&ocfs2_fs_type);
1605
1606 exit_ocfs2_uptodate_cache();
1607}
1608
1609static void ocfs2_put_super(struct super_block *sb)
1610{
1611 trace_ocfs2_put_super(sb);
1612
1613 ocfs2_sync_blockdev(sb);
1614 ocfs2_dismount_volume(sb, 0);
1615}
1616
1617static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1618{
1619 struct ocfs2_super *osb;
1620 u32 numbits, freebits;
1621 int status;
1622 struct ocfs2_dinode *bm_lock;
1623 struct buffer_head *bh = NULL;
1624 struct inode *inode = NULL;
1625
1626 trace_ocfs2_statfs(dentry->d_sb, buf);
1627
1628 osb = OCFS2_SB(dentry->d_sb);
1629
1630 inode = ocfs2_get_system_file_inode(osb,
1631 GLOBAL_BITMAP_SYSTEM_INODE,
1632 OCFS2_INVALID_SLOT);
1633 if (!inode) {
1634 mlog(ML_ERROR, "failed to get bitmap inode\n");
1635 status = -EIO;
1636 goto bail;
1637 }
1638
1639 status = ocfs2_inode_lock(inode, &bh, 0);
1640 if (status < 0) {
1641 mlog_errno(status);
1642 goto bail;
1643 }
1644
1645 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1646
1647 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1648 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1649
1650 buf->f_type = OCFS2_SUPER_MAGIC;
1651 buf->f_bsize = dentry->d_sb->s_blocksize;
1652 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1653 buf->f_blocks = ((sector_t) numbits) *
1654 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1655 buf->f_bfree = ((sector_t) freebits) *
1656 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1657 buf->f_bavail = buf->f_bfree;
1658 buf->f_files = numbits;
1659 buf->f_ffree = freebits;
1660 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1661 & 0xFFFFFFFFUL;
1662 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1663 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1664
1665 brelse(bh);
1666
1667 ocfs2_inode_unlock(inode, 0);
1668 status = 0;
1669bail:
1670 iput(inode);
1671
1672 if (status)
1673 mlog_errno(status);
1674
1675 return status;
1676}
1677
1678static void ocfs2_inode_init_once(void *data)
1679{
1680 struct ocfs2_inode_info *oi = data;
1681
1682 oi->ip_flags = 0;
1683 oi->ip_open_count = 0;
1684 spin_lock_init(&oi->ip_lock);
1685 ocfs2_extent_map_init(&oi->vfs_inode);
1686 INIT_LIST_HEAD(&oi->ip_io_markers);
1687 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1688 oi->ip_dir_start_lookup = 0;
1689 init_rwsem(&oi->ip_alloc_sem);
1690 init_rwsem(&oi->ip_xattr_sem);
1691 mutex_init(&oi->ip_io_mutex);
1692
1693 oi->ip_blkno = 0ULL;
1694 oi->ip_clusters = 0;
1695
1696 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1697
1698 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1699 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1700 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1701
1702 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1703 &ocfs2_inode_caching_ops);
1704
1705 inode_init_once(&oi->vfs_inode);
1706}
1707
1708static int ocfs2_initialize_mem_caches(void)
1709{
1710 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1711 sizeof(struct ocfs2_inode_info),
1712 0,
1713 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1714 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1715 ocfs2_inode_init_once);
1716 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1717 sizeof(struct ocfs2_dquot),
1718 0,
1719 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1720 SLAB_MEM_SPREAD),
1721 NULL);
1722 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1723 sizeof(struct ocfs2_quota_chunk),
1724 0,
1725 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1726 NULL);
1727 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1728 !ocfs2_qf_chunk_cachep) {
1729 kmem_cache_destroy(ocfs2_inode_cachep);
1730 kmem_cache_destroy(ocfs2_dquot_cachep);
1731 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1732 return -ENOMEM;
1733 }
1734
1735 return 0;
1736}
1737
1738static void ocfs2_free_mem_caches(void)
1739{
1740 /*
1741 * Make sure all delayed rcu free inodes are flushed before we
1742 * destroy cache.
1743 */
1744 rcu_barrier();
1745 kmem_cache_destroy(ocfs2_inode_cachep);
1746 ocfs2_inode_cachep = NULL;
1747
1748 kmem_cache_destroy(ocfs2_dquot_cachep);
1749 ocfs2_dquot_cachep = NULL;
1750
1751 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1752 ocfs2_qf_chunk_cachep = NULL;
1753}
1754
1755static int ocfs2_get_sector(struct super_block *sb,
1756 struct buffer_head **bh,
1757 int block,
1758 int sect_size)
1759{
1760 if (!sb_set_blocksize(sb, sect_size)) {
1761 mlog(ML_ERROR, "unable to set blocksize\n");
1762 return -EIO;
1763 }
1764
1765 *bh = sb_getblk(sb, block);
1766 if (!*bh) {
1767 mlog_errno(-ENOMEM);
1768 return -ENOMEM;
1769 }
1770 lock_buffer(*bh);
1771 if (!buffer_dirty(*bh))
1772 clear_buffer_uptodate(*bh);
1773 unlock_buffer(*bh);
1774 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1775 wait_on_buffer(*bh);
1776 if (!buffer_uptodate(*bh)) {
1777 mlog_errno(-EIO);
1778 brelse(*bh);
1779 *bh = NULL;
1780 return -EIO;
1781 }
1782
1783 return 0;
1784}
1785
1786static int ocfs2_mount_volume(struct super_block *sb)
1787{
1788 int status = 0;
1789 int unlock_super = 0;
1790 struct ocfs2_super *osb = OCFS2_SB(sb);
1791
1792 if (ocfs2_is_hard_readonly(osb))
1793 goto leave;
1794
1795 mutex_init(&osb->obs_trim_fs_mutex);
1796
1797 status = ocfs2_dlm_init(osb);
1798 if (status < 0) {
1799 mlog_errno(status);
1800 if (status == -EBADR && ocfs2_userspace_stack(osb))
1801 mlog(ML_ERROR, "couldn't mount because cluster name on"
1802 " disk does not match the running cluster name.\n");
1803 goto leave;
1804 }
1805
1806 status = ocfs2_super_lock(osb, 1);
1807 if (status < 0) {
1808 mlog_errno(status);
1809 goto leave;
1810 }
1811 unlock_super = 1;
1812
1813 /* This will load up the node map and add ourselves to it. */
1814 status = ocfs2_find_slot(osb);
1815 if (status < 0) {
1816 mlog_errno(status);
1817 goto leave;
1818 }
1819
1820 /* load all node-local system inodes */
1821 status = ocfs2_init_local_system_inodes(osb);
1822 if (status < 0) {
1823 mlog_errno(status);
1824 goto leave;
1825 }
1826
1827 status = ocfs2_check_volume(osb);
1828 if (status < 0) {
1829 mlog_errno(status);
1830 goto leave;
1831 }
1832
1833 status = ocfs2_truncate_log_init(osb);
1834 if (status < 0)
1835 mlog_errno(status);
1836
1837leave:
1838 if (unlock_super)
1839 ocfs2_super_unlock(osb, 1);
1840
1841 return status;
1842}
1843
1844static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1845{
1846 int tmp, hangup_needed = 0;
1847 struct ocfs2_super *osb = NULL;
1848 char nodestr[12];
1849
1850 trace_ocfs2_dismount_volume(sb);
1851
1852 BUG_ON(!sb);
1853 osb = OCFS2_SB(sb);
1854 BUG_ON(!osb);
1855
1856 /* Remove file check sysfs related directores/files,
1857 * and wait for the pending file check operations */
1858 ocfs2_filecheck_remove_sysfs(osb);
1859
1860 kset_unregister(osb->osb_dev_kset);
1861
1862 /* Orphan scan should be stopped as early as possible */
1863 ocfs2_orphan_scan_stop(osb);
1864
1865 ocfs2_disable_quotas(osb);
1866
1867 /* All dquots should be freed by now */
1868 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1869 /* Wait for worker to be done with the work structure in osb */
1870 cancel_work_sync(&osb->dquot_drop_work);
1871
1872 ocfs2_shutdown_local_alloc(osb);
1873
1874 ocfs2_truncate_log_shutdown(osb);
1875
1876 /* This will disable recovery and flush any recovery work. */
1877 ocfs2_recovery_exit(osb);
1878
1879 ocfs2_journal_shutdown(osb);
1880
1881 ocfs2_sync_blockdev(sb);
1882
1883 ocfs2_purge_refcount_trees(osb);
1884
1885 /* No cluster connection means we've failed during mount, so skip
1886 * all the steps which depended on that to complete. */
1887 if (osb->cconn) {
1888 tmp = ocfs2_super_lock(osb, 1);
1889 if (tmp < 0) {
1890 mlog_errno(tmp);
1891 return;
1892 }
1893 }
1894
1895 if (osb->slot_num != OCFS2_INVALID_SLOT)
1896 ocfs2_put_slot(osb);
1897
1898 if (osb->cconn)
1899 ocfs2_super_unlock(osb, 1);
1900
1901 ocfs2_release_system_inodes(osb);
1902
1903 /*
1904 * If we're dismounting due to mount error, mount.ocfs2 will clean
1905 * up heartbeat. If we're a local mount, there is no heartbeat.
1906 * If we failed before we got a uuid_str yet, we can't stop
1907 * heartbeat. Otherwise, do it.
1908 */
1909 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1910 !ocfs2_is_hard_readonly(osb))
1911 hangup_needed = 1;
1912
1913 if (osb->cconn)
1914 ocfs2_dlm_shutdown(osb, hangup_needed);
1915
1916 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1917 debugfs_remove_recursive(osb->osb_debug_root);
1918
1919 if (hangup_needed)
1920 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1921
1922 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1923
1924 if (ocfs2_mount_local(osb))
1925 snprintf(nodestr, sizeof(nodestr), "local");
1926 else
1927 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1928
1929 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1930 osb->dev_str, nodestr);
1931
1932 ocfs2_delete_osb(osb);
1933 kfree(osb);
1934 sb->s_dev = 0;
1935 sb->s_fs_info = NULL;
1936}
1937
1938static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1939 unsigned uuid_bytes)
1940{
1941 int i, ret;
1942 char *ptr;
1943
1944 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1945
1946 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1947 if (osb->uuid_str == NULL)
1948 return -ENOMEM;
1949
1950 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1951 /* print with null */
1952 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1953 if (ret != 2) /* drop super cleans up */
1954 return -EINVAL;
1955 /* then only advance past the last char */
1956 ptr += 2;
1957 }
1958
1959 return 0;
1960}
1961
1962/* Make sure entire volume is addressable by our journal. Requires
1963 osb_clusters_at_boot to be valid and for the journal to have been
1964 initialized by ocfs2_journal_init(). */
1965static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1966{
1967 int status = 0;
1968 u64 max_block =
1969 ocfs2_clusters_to_blocks(osb->sb,
1970 osb->osb_clusters_at_boot) - 1;
1971
1972 /* 32-bit block number is always OK. */
1973 if (max_block <= (u32)~0ULL)
1974 goto out;
1975
1976 /* Volume is "huge", so see if our journal is new enough to
1977 support it. */
1978 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1979 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1980 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1981 JBD2_FEATURE_INCOMPAT_64BIT))) {
1982 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1983 "Enable the 'block64' journal option with tunefs.ocfs2");
1984 status = -EFBIG;
1985 goto out;
1986 }
1987
1988 out:
1989 return status;
1990}
1991
1992static int ocfs2_initialize_super(struct super_block *sb,
1993 struct buffer_head *bh,
1994 int sector_size,
1995 struct ocfs2_blockcheck_stats *stats)
1996{
1997 int status;
1998 int i, cbits, bbits;
1999 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2000 struct inode *inode = NULL;
2001 struct ocfs2_journal *journal;
2002 struct ocfs2_super *osb;
2003 u64 total_blocks;
2004
2005 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2006 if (!osb) {
2007 status = -ENOMEM;
2008 mlog_errno(status);
2009 goto bail;
2010 }
2011
2012 sb->s_fs_info = osb;
2013 sb->s_op = &ocfs2_sops;
2014 sb->s_d_op = &ocfs2_dentry_ops;
2015 sb->s_export_op = &ocfs2_export_ops;
2016 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2017 sb->dq_op = &ocfs2_quota_operations;
2018 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2019 sb->s_xattr = ocfs2_xattr_handlers;
2020 sb->s_time_gran = 1;
2021 sb->s_flags |= SB_NOATIME;
2022 /* this is needed to support O_LARGEFILE */
2023 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2024 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2025 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2026 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2027 sizeof(di->id2.i_super.s_uuid));
2028
2029 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2030
2031 for (i = 0; i < 3; i++)
2032 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2033 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2034
2035 osb->sb = sb;
2036 osb->s_sectsize_bits = blksize_bits(sector_size);
2037 BUG_ON(!osb->s_sectsize_bits);
2038
2039 spin_lock_init(&osb->dc_task_lock);
2040 init_waitqueue_head(&osb->dc_event);
2041 osb->dc_work_sequence = 0;
2042 osb->dc_wake_sequence = 0;
2043 INIT_LIST_HEAD(&osb->blocked_lock_list);
2044 osb->blocked_lock_count = 0;
2045 spin_lock_init(&osb->osb_lock);
2046 spin_lock_init(&osb->osb_xattr_lock);
2047 ocfs2_init_steal_slots(osb);
2048
2049 mutex_init(&osb->system_file_mutex);
2050
2051 atomic_set(&osb->alloc_stats.moves, 0);
2052 atomic_set(&osb->alloc_stats.local_data, 0);
2053 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2054 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2055 atomic_set(&osb->alloc_stats.bg_extends, 0);
2056
2057 /* Copy the blockcheck stats from the superblock probe */
2058 osb->osb_ecc_stats = *stats;
2059
2060 ocfs2_init_node_maps(osb);
2061
2062 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2063 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2064
2065 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2066 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2067 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2068 osb->max_slots);
2069 status = -EINVAL;
2070 goto bail;
2071 }
2072
2073 ocfs2_orphan_scan_init(osb);
2074
2075 status = ocfs2_recovery_init(osb);
2076 if (status) {
2077 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2078 mlog_errno(status);
2079 goto bail;
2080 }
2081
2082 init_waitqueue_head(&osb->checkpoint_event);
2083
2084 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2085
2086 osb->slot_num = OCFS2_INVALID_SLOT;
2087
2088 osb->s_xattr_inline_size = le16_to_cpu(
2089 di->id2.i_super.s_xattr_inline_size);
2090
2091 osb->local_alloc_state = OCFS2_LA_UNUSED;
2092 osb->local_alloc_bh = NULL;
2093 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2094
2095 init_waitqueue_head(&osb->osb_mount_event);
2096
2097 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2098 if (status) {
2099 mlog_errno(status);
2100 goto bail;
2101 }
2102
2103 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2104 if (!osb->vol_label) {
2105 mlog(ML_ERROR, "unable to alloc vol label\n");
2106 status = -ENOMEM;
2107 goto bail;
2108 }
2109
2110 osb->slot_recovery_generations =
2111 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2112 GFP_KERNEL);
2113 if (!osb->slot_recovery_generations) {
2114 status = -ENOMEM;
2115 mlog_errno(status);
2116 goto bail;
2117 }
2118
2119 init_waitqueue_head(&osb->osb_wipe_event);
2120 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2121 sizeof(*osb->osb_orphan_wipes),
2122 GFP_KERNEL);
2123 if (!osb->osb_orphan_wipes) {
2124 status = -ENOMEM;
2125 mlog_errno(status);
2126 goto bail;
2127 }
2128
2129 osb->osb_rf_lock_tree = RB_ROOT;
2130
2131 osb->s_feature_compat =
2132 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2133 osb->s_feature_ro_compat =
2134 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2135 osb->s_feature_incompat =
2136 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2137
2138 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2139 mlog(ML_ERROR, "couldn't mount because of unsupported "
2140 "optional features (%x).\n", i);
2141 status = -EINVAL;
2142 goto bail;
2143 }
2144 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2145 mlog(ML_ERROR, "couldn't mount RDWR because of "
2146 "unsupported optional features (%x).\n", i);
2147 status = -EINVAL;
2148 goto bail;
2149 }
2150
2151 if (ocfs2_clusterinfo_valid(osb)) {
2152 osb->osb_stackflags =
2153 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2154 strlcpy(osb->osb_cluster_stack,
2155 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2156 OCFS2_STACK_LABEL_LEN + 1);
2157 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2158 mlog(ML_ERROR,
2159 "couldn't mount because of an invalid "
2160 "cluster stack label (%s) \n",
2161 osb->osb_cluster_stack);
2162 status = -EINVAL;
2163 goto bail;
2164 }
2165 strlcpy(osb->osb_cluster_name,
2166 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2167 OCFS2_CLUSTER_NAME_LEN + 1);
2168 } else {
2169 /* The empty string is identical with classic tools that
2170 * don't know about s_cluster_info. */
2171 osb->osb_cluster_stack[0] = '\0';
2172 }
2173
2174 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2175
2176 /* FIXME
2177 * This should be done in ocfs2_journal_init(), but unknown
2178 * ordering issues will cause the filesystem to crash.
2179 * If anyone wants to figure out what part of the code
2180 * refers to osb->journal before ocfs2_journal_init() is run,
2181 * be my guest.
2182 */
2183 /* initialize our journal structure */
2184
2185 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2186 if (!journal) {
2187 mlog(ML_ERROR, "unable to alloc journal\n");
2188 status = -ENOMEM;
2189 goto bail;
2190 }
2191 osb->journal = journal;
2192 journal->j_osb = osb;
2193
2194 atomic_set(&journal->j_num_trans, 0);
2195 init_rwsem(&journal->j_trans_barrier);
2196 init_waitqueue_head(&journal->j_checkpointed);
2197 spin_lock_init(&journal->j_lock);
2198 journal->j_trans_id = (unsigned long) 1;
2199 INIT_LIST_HEAD(&journal->j_la_cleanups);
2200 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2201 journal->j_state = OCFS2_JOURNAL_FREE;
2202
2203 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2204 init_llist_head(&osb->dquot_drop_list);
2205
2206 /* get some pseudo constants for clustersize bits */
2207 osb->s_clustersize_bits =
2208 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2209 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2210
2211 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2212 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2213 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2214 osb->s_clustersize);
2215 status = -EINVAL;
2216 goto bail;
2217 }
2218
2219 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2220 le32_to_cpu(di->i_clusters));
2221
2222 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2223 total_blocks);
2224 if (status) {
2225 mlog(ML_ERROR, "Volume too large "
2226 "to mount safely on this system");
2227 status = -EFBIG;
2228 goto bail;
2229 }
2230
2231 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2232 sizeof(di->id2.i_super.s_uuid))) {
2233 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2234 status = -ENOMEM;
2235 goto bail;
2236 }
2237
2238 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2239 OCFS2_MAX_VOL_LABEL_LEN);
2240 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2241 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2242 osb->first_cluster_group_blkno =
2243 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2244 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2245 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2246 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2247 (unsigned long long)osb->root_blkno,
2248 (unsigned long long)osb->system_dir_blkno,
2249 osb->s_clustersize_bits);
2250
2251 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2252 if (!osb->osb_dlm_debug) {
2253 status = -ENOMEM;
2254 mlog_errno(status);
2255 goto bail;
2256 }
2257
2258 atomic_set(&osb->vol_state, VOLUME_INIT);
2259
2260 /* load root, system_dir, and all global system inodes */
2261 status = ocfs2_init_global_system_inodes(osb);
2262 if (status < 0) {
2263 mlog_errno(status);
2264 goto bail;
2265 }
2266
2267 /*
2268 * global bitmap
2269 */
2270 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2271 OCFS2_INVALID_SLOT);
2272 if (!inode) {
2273 status = -EINVAL;
2274 mlog_errno(status);
2275 goto bail;
2276 }
2277
2278 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2279 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2280 iput(inode);
2281
2282 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2283 osb->s_feature_incompat) * 8;
2284
2285 status = ocfs2_init_slot_info(osb);
2286 if (status < 0) {
2287 mlog_errno(status);
2288 goto bail;
2289 }
2290 cleancache_init_shared_fs(sb);
2291
2292 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2293 if (!osb->ocfs2_wq) {
2294 status = -ENOMEM;
2295 mlog_errno(status);
2296 }
2297
2298bail:
2299 return status;
2300}
2301
2302/*
2303 * will return: -EAGAIN if it is ok to keep searching for superblocks
2304 * -EINVAL if there is a bad superblock
2305 * 0 on success
2306 */
2307static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2308 struct buffer_head *bh,
2309 u32 blksz,
2310 struct ocfs2_blockcheck_stats *stats)
2311{
2312 int status = -EAGAIN;
2313
2314 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2315 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2316 /* We have to do a raw check of the feature here */
2317 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2318 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2319 status = ocfs2_block_check_validate(bh->b_data,
2320 bh->b_size,
2321 &di->i_check,
2322 stats);
2323 if (status)
2324 goto out;
2325 }
2326 status = -EINVAL;
2327 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2328 mlog(ML_ERROR, "found superblock with incorrect block "
2329 "size: found %u, should be %u\n",
2330 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2331 blksz);
2332 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2333 OCFS2_MAJOR_REV_LEVEL ||
2334 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2335 OCFS2_MINOR_REV_LEVEL) {
2336 mlog(ML_ERROR, "found superblock with bad version: "
2337 "found %u.%u, should be %u.%u\n",
2338 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2339 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2340 OCFS2_MAJOR_REV_LEVEL,
2341 OCFS2_MINOR_REV_LEVEL);
2342 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2343 mlog(ML_ERROR, "bad block number on superblock: "
2344 "found %llu, should be %llu\n",
2345 (unsigned long long)le64_to_cpu(di->i_blkno),
2346 (unsigned long long)bh->b_blocknr);
2347 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2348 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2349 mlog(ML_ERROR, "bad cluster size found: %u\n",
2350 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2351 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2352 mlog(ML_ERROR, "bad root_blkno: 0\n");
2353 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2354 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2355 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2356 mlog(ML_ERROR,
2357 "Superblock slots found greater than file system "
2358 "maximum: found %u, max %u\n",
2359 le16_to_cpu(di->id2.i_super.s_max_slots),
2360 OCFS2_MAX_SLOTS);
2361 } else {
2362 /* found it! */
2363 status = 0;
2364 }
2365 }
2366
2367out:
2368 if (status && status != -EAGAIN)
2369 mlog_errno(status);
2370 return status;
2371}
2372
2373static int ocfs2_check_volume(struct ocfs2_super *osb)
2374{
2375 int status;
2376 int dirty;
2377 int local;
2378 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2379 * recover
2380 * ourselves. */
2381
2382 /* Init our journal object. */
2383 status = ocfs2_journal_init(osb->journal, &dirty);
2384 if (status < 0) {
2385 mlog(ML_ERROR, "Could not initialize journal!\n");
2386 goto finally;
2387 }
2388
2389 /* Now that journal has been initialized, check to make sure
2390 entire volume is addressable. */
2391 status = ocfs2_journal_addressable(osb);
2392 if (status)
2393 goto finally;
2394
2395 /* If the journal was unmounted cleanly then we don't want to
2396 * recover anything. Otherwise, journal_load will do that
2397 * dirty work for us :) */
2398 if (!dirty) {
2399 status = ocfs2_journal_wipe(osb->journal, 0);
2400 if (status < 0) {
2401 mlog_errno(status);
2402 goto finally;
2403 }
2404 } else {
2405 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2406 "unmounted cleanly, recovering it.\n", osb->dev_str);
2407 }
2408
2409 local = ocfs2_mount_local(osb);
2410
2411 /* will play back anything left in the journal. */
2412 status = ocfs2_journal_load(osb->journal, local, dirty);
2413 if (status < 0) {
2414 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2415 goto finally;
2416 }
2417
2418 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2419 jbd2_journal_set_features(osb->journal->j_journal,
2420 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2421 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2422 else
2423 jbd2_journal_clear_features(osb->journal->j_journal,
2424 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2425 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2426
2427 if (dirty) {
2428 /* recover my local alloc if we didn't unmount cleanly. */
2429 status = ocfs2_begin_local_alloc_recovery(osb,
2430 osb->slot_num,
2431 &local_alloc);
2432 if (status < 0) {
2433 mlog_errno(status);
2434 goto finally;
2435 }
2436 /* we complete the recovery process after we've marked
2437 * ourselves as mounted. */
2438 }
2439
2440 status = ocfs2_load_local_alloc(osb);
2441 if (status < 0) {
2442 mlog_errno(status);
2443 goto finally;
2444 }
2445
2446 if (dirty) {
2447 /* Recovery will be completed after we've mounted the
2448 * rest of the volume. */
2449 osb->local_alloc_copy = local_alloc;
2450 local_alloc = NULL;
2451 }
2452
2453 /* go through each journal, trylock it and if you get the
2454 * lock, and it's marked as dirty, set the bit in the recover
2455 * map and launch a recovery thread for it. */
2456 status = ocfs2_mark_dead_nodes(osb);
2457 if (status < 0) {
2458 mlog_errno(status);
2459 goto finally;
2460 }
2461
2462 status = ocfs2_compute_replay_slots(osb);
2463 if (status < 0)
2464 mlog_errno(status);
2465
2466finally:
2467 kfree(local_alloc);
2468
2469 if (status)
2470 mlog_errno(status);
2471 return status;
2472}
2473
2474/*
2475 * The routine gets called from dismount or close whenever a dismount on
2476 * volume is requested and the osb open count becomes 1.
2477 * It will remove the osb from the global list and also free up all the
2478 * initialized resources and fileobject.
2479 */
2480static void ocfs2_delete_osb(struct ocfs2_super *osb)
2481{
2482 /* This function assumes that the caller has the main osb resource */
2483
2484 /* ocfs2_initializer_super have already created this workqueue */
2485 if (osb->ocfs2_wq)
2486 destroy_workqueue(osb->ocfs2_wq);
2487
2488 ocfs2_free_slot_info(osb);
2489
2490 kfree(osb->osb_orphan_wipes);
2491 kfree(osb->slot_recovery_generations);
2492 /* FIXME
2493 * This belongs in journal shutdown, but because we have to
2494 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2495 * we free it here.
2496 */
2497 kfree(osb->journal);
2498 kfree(osb->local_alloc_copy);
2499 kfree(osb->uuid_str);
2500 kfree(osb->vol_label);
2501 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2502 memset(osb, 0, sizeof(struct ocfs2_super));
2503}
2504
2505/* Depending on the mount option passed, perform one of the following:
2506 * Put OCFS2 into a readonly state (default)
2507 * Return EIO so that only the process errs
2508 * Fix the error as if fsck.ocfs2 -y
2509 * panic
2510 */
2511static int ocfs2_handle_error(struct super_block *sb)
2512{
2513 struct ocfs2_super *osb = OCFS2_SB(sb);
2514 int rv = 0;
2515
2516 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2517 pr_crit("On-disk corruption discovered. "
2518 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2519
2520 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2521 panic("OCFS2: (device %s): panic forced after error\n",
2522 sb->s_id);
2523 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2524 pr_crit("OCFS2: Returning error to the calling process.\n");
2525 rv = -EIO;
2526 } else { /* default option */
2527 rv = -EROFS;
2528 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2529 return rv;
2530
2531 pr_crit("OCFS2: File system is now read-only.\n");
2532 sb->s_flags |= SB_RDONLY;
2533 ocfs2_set_ro_flag(osb, 0);
2534 }
2535
2536 return rv;
2537}
2538
2539int __ocfs2_error(struct super_block *sb, const char *function,
2540 const char *fmt, ...)
2541{
2542 struct va_format vaf;
2543 va_list args;
2544
2545 va_start(args, fmt);
2546 vaf.fmt = fmt;
2547 vaf.va = &args;
2548
2549 /* Not using mlog here because we want to show the actual
2550 * function the error came from. */
2551 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2552 sb->s_id, function, &vaf);
2553
2554 va_end(args);
2555
2556 return ocfs2_handle_error(sb);
2557}
2558
2559/* Handle critical errors. This is intentionally more drastic than
2560 * ocfs2_handle_error, so we only use for things like journal errors,
2561 * etc. */
2562void __ocfs2_abort(struct super_block *sb, const char *function,
2563 const char *fmt, ...)
2564{
2565 struct va_format vaf;
2566 va_list args;
2567
2568 va_start(args, fmt);
2569
2570 vaf.fmt = fmt;
2571 vaf.va = &args;
2572
2573 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2574 sb->s_id, function, &vaf);
2575
2576 va_end(args);
2577
2578 /* We don't have the cluster support yet to go straight to
2579 * hard readonly in here. Until then, we want to keep
2580 * ocfs2_abort() so that we can at least mark critical
2581 * errors.
2582 *
2583 * TODO: This should abort the journal and alert other nodes
2584 * that our slot needs recovery. */
2585
2586 /* Force a panic(). This stinks, but it's better than letting
2587 * things continue without having a proper hard readonly
2588 * here. */
2589 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2590 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2591 ocfs2_handle_error(sb);
2592}
2593
2594/*
2595 * Void signal blockers, because in-kernel sigprocmask() only fails
2596 * when SIG_* is wrong.
2597 */
2598void ocfs2_block_signals(sigset_t *oldset)
2599{
2600 int rc;
2601 sigset_t blocked;
2602
2603 sigfillset(&blocked);
2604 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2605 BUG_ON(rc);
2606}
2607
2608void ocfs2_unblock_signals(sigset_t *oldset)
2609{
2610 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2611 BUG_ON(rc);
2612}
2613
2614module_init(ocfs2_init);
2615module_exit(ocfs2_exit);
1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26#include <linux/module.h>
27#include <linux/fs.h>
28#include <linux/types.h>
29#include <linux/slab.h>
30#include <linux/highmem.h>
31#include <linux/init.h>
32#include <linux/random.h>
33#include <linux/statfs.h>
34#include <linux/moduleparam.h>
35#include <linux/blkdev.h>
36#include <linux/socket.h>
37#include <linux/inet.h>
38#include <linux/parser.h>
39#include <linux/crc32.h>
40#include <linux/debugfs.h>
41#include <linux/mount.h>
42#include <linux/seq_file.h>
43#include <linux/quotaops.h>
44#include <linux/cleancache.h>
45
46#define CREATE_TRACE_POINTS
47#include "ocfs2_trace.h"
48
49#include <cluster/masklog.h>
50
51#include "ocfs2.h"
52
53/* this should be the only file to include a version 1 header */
54#include "ocfs1_fs_compat.h"
55
56#include "alloc.h"
57#include "aops.h"
58#include "blockcheck.h"
59#include "dlmglue.h"
60#include "export.h"
61#include "extent_map.h"
62#include "heartbeat.h"
63#include "inode.h"
64#include "journal.h"
65#include "localalloc.h"
66#include "namei.h"
67#include "slot_map.h"
68#include "super.h"
69#include "sysfile.h"
70#include "uptodate.h"
71#include "xattr.h"
72#include "quota.h"
73#include "refcounttree.h"
74#include "suballoc.h"
75
76#include "buffer_head_io.h"
77#include "filecheck.h"
78
79static struct kmem_cache *ocfs2_inode_cachep;
80struct kmem_cache *ocfs2_dquot_cachep;
81struct kmem_cache *ocfs2_qf_chunk_cachep;
82
83static struct dentry *ocfs2_debugfs_root;
84
85MODULE_AUTHOR("Oracle");
86MODULE_LICENSE("GPL");
87MODULE_DESCRIPTION("OCFS2 cluster file system");
88
89struct mount_options
90{
91 unsigned long commit_interval;
92 unsigned long mount_opt;
93 unsigned int atime_quantum;
94 signed short slot;
95 int localalloc_opt;
96 unsigned int resv_level;
97 int dir_resv_level;
98 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
99};
100
101static int ocfs2_parse_options(struct super_block *sb, char *options,
102 struct mount_options *mopt,
103 int is_remount);
104static int ocfs2_check_set_options(struct super_block *sb,
105 struct mount_options *options);
106static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
107static void ocfs2_put_super(struct super_block *sb);
108static int ocfs2_mount_volume(struct super_block *sb);
109static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
110static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
111static int ocfs2_initialize_mem_caches(void);
112static void ocfs2_free_mem_caches(void);
113static void ocfs2_delete_osb(struct ocfs2_super *osb);
114
115static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
116
117static int ocfs2_sync_fs(struct super_block *sb, int wait);
118
119static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
120static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
121static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
122static int ocfs2_check_volume(struct ocfs2_super *osb);
123static int ocfs2_verify_volume(struct ocfs2_dinode *di,
124 struct buffer_head *bh,
125 u32 sectsize,
126 struct ocfs2_blockcheck_stats *stats);
127static int ocfs2_initialize_super(struct super_block *sb,
128 struct buffer_head *bh,
129 int sector_size,
130 struct ocfs2_blockcheck_stats *stats);
131static int ocfs2_get_sector(struct super_block *sb,
132 struct buffer_head **bh,
133 int block,
134 int sect_size);
135static struct inode *ocfs2_alloc_inode(struct super_block *sb);
136static void ocfs2_destroy_inode(struct inode *inode);
137static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
138static int ocfs2_enable_quotas(struct ocfs2_super *osb);
139static void ocfs2_disable_quotas(struct ocfs2_super *osb);
140
141static struct dquot **ocfs2_get_dquots(struct inode *inode)
142{
143 return OCFS2_I(inode)->i_dquot;
144}
145
146static const struct super_operations ocfs2_sops = {
147 .statfs = ocfs2_statfs,
148 .alloc_inode = ocfs2_alloc_inode,
149 .destroy_inode = ocfs2_destroy_inode,
150 .drop_inode = ocfs2_drop_inode,
151 .evict_inode = ocfs2_evict_inode,
152 .sync_fs = ocfs2_sync_fs,
153 .put_super = ocfs2_put_super,
154 .remount_fs = ocfs2_remount,
155 .show_options = ocfs2_show_options,
156 .quota_read = ocfs2_quota_read,
157 .quota_write = ocfs2_quota_write,
158 .get_dquots = ocfs2_get_dquots,
159};
160
161enum {
162 Opt_barrier,
163 Opt_err_panic,
164 Opt_err_ro,
165 Opt_intr,
166 Opt_nointr,
167 Opt_hb_none,
168 Opt_hb_local,
169 Opt_hb_global,
170 Opt_data_ordered,
171 Opt_data_writeback,
172 Opt_atime_quantum,
173 Opt_slot,
174 Opt_commit,
175 Opt_localalloc,
176 Opt_localflocks,
177 Opt_stack,
178 Opt_user_xattr,
179 Opt_nouser_xattr,
180 Opt_inode64,
181 Opt_acl,
182 Opt_noacl,
183 Opt_usrquota,
184 Opt_grpquota,
185 Opt_coherency_buffered,
186 Opt_coherency_full,
187 Opt_resv_level,
188 Opt_dir_resv_level,
189 Opt_journal_async_commit,
190 Opt_err_cont,
191 Opt_err,
192};
193
194static const match_table_t tokens = {
195 {Opt_barrier, "barrier=%u"},
196 {Opt_err_panic, "errors=panic"},
197 {Opt_err_ro, "errors=remount-ro"},
198 {Opt_intr, "intr"},
199 {Opt_nointr, "nointr"},
200 {Opt_hb_none, OCFS2_HB_NONE},
201 {Opt_hb_local, OCFS2_HB_LOCAL},
202 {Opt_hb_global, OCFS2_HB_GLOBAL},
203 {Opt_data_ordered, "data=ordered"},
204 {Opt_data_writeback, "data=writeback"},
205 {Opt_atime_quantum, "atime_quantum=%u"},
206 {Opt_slot, "preferred_slot=%u"},
207 {Opt_commit, "commit=%u"},
208 {Opt_localalloc, "localalloc=%d"},
209 {Opt_localflocks, "localflocks"},
210 {Opt_stack, "cluster_stack=%s"},
211 {Opt_user_xattr, "user_xattr"},
212 {Opt_nouser_xattr, "nouser_xattr"},
213 {Opt_inode64, "inode64"},
214 {Opt_acl, "acl"},
215 {Opt_noacl, "noacl"},
216 {Opt_usrquota, "usrquota"},
217 {Opt_grpquota, "grpquota"},
218 {Opt_coherency_buffered, "coherency=buffered"},
219 {Opt_coherency_full, "coherency=full"},
220 {Opt_resv_level, "resv_level=%u"},
221 {Opt_dir_resv_level, "dir_resv_level=%u"},
222 {Opt_journal_async_commit, "journal_async_commit"},
223 {Opt_err_cont, "errors=continue"},
224 {Opt_err, NULL}
225};
226
227#ifdef CONFIG_DEBUG_FS
228static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
229{
230 struct ocfs2_cluster_connection *cconn = osb->cconn;
231 struct ocfs2_recovery_map *rm = osb->recovery_map;
232 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
233 int i, out = 0;
234 unsigned long flags;
235
236 out += snprintf(buf + out, len - out,
237 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
238 "Device", osb->dev_str, osb->uuid_str,
239 osb->fs_generation, osb->vol_label);
240
241 out += snprintf(buf + out, len - out,
242 "%10s => State: %d Flags: 0x%lX\n", "Volume",
243 atomic_read(&osb->vol_state), osb->osb_flags);
244
245 out += snprintf(buf + out, len - out,
246 "%10s => Block: %lu Cluster: %d\n", "Sizes",
247 osb->sb->s_blocksize, osb->s_clustersize);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Compat: 0x%X Incompat: 0x%X "
251 "ROcompat: 0x%X\n",
252 "Features", osb->s_feature_compat,
253 osb->s_feature_incompat, osb->s_feature_ro_compat);
254
255 out += snprintf(buf + out, len - out,
256 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
257 osb->s_mount_opt, osb->s_atime_quantum);
258
259 if (cconn) {
260 out += snprintf(buf + out, len - out,
261 "%10s => Stack: %s Name: %*s "
262 "Version: %d.%d\n", "Cluster",
263 (*osb->osb_cluster_stack == '\0' ?
264 "o2cb" : osb->osb_cluster_stack),
265 cconn->cc_namelen, cconn->cc_name,
266 cconn->cc_version.pv_major,
267 cconn->cc_version.pv_minor);
268 }
269
270 spin_lock_irqsave(&osb->dc_task_lock, flags);
271 out += snprintf(buf + out, len - out,
272 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
273 "WorkSeq: %lu\n", "DownCnvt",
274 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
275 osb->blocked_lock_count, osb->dc_wake_sequence,
276 osb->dc_work_sequence);
277 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
278
279 spin_lock(&osb->osb_lock);
280 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
281 "Recovery",
282 (osb->recovery_thread_task ?
283 task_pid_nr(osb->recovery_thread_task) : -1));
284 if (rm->rm_used == 0)
285 out += snprintf(buf + out, len - out, " None\n");
286 else {
287 for (i = 0; i < rm->rm_used; i++)
288 out += snprintf(buf + out, len - out, " %d",
289 rm->rm_entries[i]);
290 out += snprintf(buf + out, len - out, "\n");
291 }
292 spin_unlock(&osb->osb_lock);
293
294 out += snprintf(buf + out, len - out,
295 "%10s => Pid: %d Interval: %lu\n", "Commit",
296 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
297 osb->osb_commit_interval);
298
299 out += snprintf(buf + out, len - out,
300 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
301 "Journal", osb->journal->j_state,
302 osb->journal->j_trans_id,
303 atomic_read(&osb->journal->j_num_trans));
304
305 out += snprintf(buf + out, len - out,
306 "%10s => GlobalAllocs: %d LocalAllocs: %d "
307 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
308 "Stats",
309 atomic_read(&osb->alloc_stats.bitmap_data),
310 atomic_read(&osb->alloc_stats.local_data),
311 atomic_read(&osb->alloc_stats.bg_allocs),
312 atomic_read(&osb->alloc_stats.moves),
313 atomic_read(&osb->alloc_stats.bg_extends));
314
315 out += snprintf(buf + out, len - out,
316 "%10s => State: %u Descriptor: %llu Size: %u bits "
317 "Default: %u bits\n",
318 "LocalAlloc", osb->local_alloc_state,
319 (unsigned long long)osb->la_last_gd,
320 osb->local_alloc_bits, osb->local_alloc_default_bits);
321
322 spin_lock(&osb->osb_lock);
323 out += snprintf(buf + out, len - out,
324 "%10s => InodeSlot: %d StolenInodes: %d, "
325 "MetaSlot: %d StolenMeta: %d\n", "Steal",
326 osb->s_inode_steal_slot,
327 atomic_read(&osb->s_num_inodes_stolen),
328 osb->s_meta_steal_slot,
329 atomic_read(&osb->s_num_meta_stolen));
330 spin_unlock(&osb->osb_lock);
331
332 out += snprintf(buf + out, len - out, "OrphanScan => ");
333 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
334 os->os_count, os->os_seqno);
335 out += snprintf(buf + out, len - out, " Last Scan: ");
336 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
337 out += snprintf(buf + out, len - out, "Disabled\n");
338 else
339 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
340 (get_seconds() - os->os_scantime.tv_sec));
341
342 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
343 "Slots", "Num", "RecoGen");
344 for (i = 0; i < osb->max_slots; ++i) {
345 out += snprintf(buf + out, len - out,
346 "%10s %c %3d %10d\n",
347 " ",
348 (i == osb->slot_num ? '*' : ' '),
349 i, osb->slot_recovery_generations[i]);
350 }
351
352 return out;
353}
354
355static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
356{
357 struct ocfs2_super *osb = inode->i_private;
358 char *buf = NULL;
359
360 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
361 if (!buf)
362 goto bail;
363
364 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
365
366 file->private_data = buf;
367
368 return 0;
369bail:
370 return -ENOMEM;
371}
372
373static int ocfs2_debug_release(struct inode *inode, struct file *file)
374{
375 kfree(file->private_data);
376 return 0;
377}
378
379static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
380 size_t nbytes, loff_t *ppos)
381{
382 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
383 i_size_read(file->f_mapping->host));
384}
385#else
386static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
387{
388 return 0;
389}
390static int ocfs2_debug_release(struct inode *inode, struct file *file)
391{
392 return 0;
393}
394static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
395 size_t nbytes, loff_t *ppos)
396{
397 return 0;
398}
399#endif /* CONFIG_DEBUG_FS */
400
401static const struct file_operations ocfs2_osb_debug_fops = {
402 .open = ocfs2_osb_debug_open,
403 .release = ocfs2_debug_release,
404 .read = ocfs2_debug_read,
405 .llseek = generic_file_llseek,
406};
407
408static int ocfs2_sync_fs(struct super_block *sb, int wait)
409{
410 int status;
411 tid_t target;
412 struct ocfs2_super *osb = OCFS2_SB(sb);
413
414 if (ocfs2_is_hard_readonly(osb))
415 return -EROFS;
416
417 if (wait) {
418 status = ocfs2_flush_truncate_log(osb);
419 if (status < 0)
420 mlog_errno(status);
421 } else {
422 ocfs2_schedule_truncate_log_flush(osb, 0);
423 }
424
425 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
426 &target)) {
427 if (wait)
428 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
429 target);
430 }
431 return 0;
432}
433
434static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
435{
436 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
437 && (ino == USER_QUOTA_SYSTEM_INODE
438 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
439 return 0;
440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
441 && (ino == GROUP_QUOTA_SYSTEM_INODE
442 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
443 return 0;
444 return 1;
445}
446
447static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
448{
449 struct inode *new = NULL;
450 int status = 0;
451 int i;
452
453 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
454 if (IS_ERR(new)) {
455 status = PTR_ERR(new);
456 mlog_errno(status);
457 goto bail;
458 }
459 osb->root_inode = new;
460
461 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
462 if (IS_ERR(new)) {
463 status = PTR_ERR(new);
464 mlog_errno(status);
465 goto bail;
466 }
467 osb->sys_root_inode = new;
468
469 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
470 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
471 if (!ocfs2_need_system_inode(osb, i))
472 continue;
473 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
474 if (!new) {
475 ocfs2_release_system_inodes(osb);
476 status = -EINVAL;
477 mlog_errno(status);
478 /* FIXME: Should ERROR_RO_FS */
479 mlog(ML_ERROR, "Unable to load system inode %d, "
480 "possibly corrupt fs?", i);
481 goto bail;
482 }
483 // the array now has one ref, so drop this one
484 iput(new);
485 }
486
487bail:
488 if (status)
489 mlog_errno(status);
490 return status;
491}
492
493static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
494{
495 struct inode *new = NULL;
496 int status = 0;
497 int i;
498
499 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
500 i < NUM_SYSTEM_INODES;
501 i++) {
502 if (!ocfs2_need_system_inode(osb, i))
503 continue;
504 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
505 if (!new) {
506 ocfs2_release_system_inodes(osb);
507 status = -EINVAL;
508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
509 status, i, osb->slot_num);
510 goto bail;
511 }
512 /* the array now has one ref, so drop this one */
513 iput(new);
514 }
515
516bail:
517 if (status)
518 mlog_errno(status);
519 return status;
520}
521
522static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
523{
524 int i;
525 struct inode *inode;
526
527 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
528 inode = osb->global_system_inodes[i];
529 if (inode) {
530 iput(inode);
531 osb->global_system_inodes[i] = NULL;
532 }
533 }
534
535 inode = osb->sys_root_inode;
536 if (inode) {
537 iput(inode);
538 osb->sys_root_inode = NULL;
539 }
540
541 inode = osb->root_inode;
542 if (inode) {
543 iput(inode);
544 osb->root_inode = NULL;
545 }
546
547 if (!osb->local_system_inodes)
548 return;
549
550 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
551 if (osb->local_system_inodes[i]) {
552 iput(osb->local_system_inodes[i]);
553 osb->local_system_inodes[i] = NULL;
554 }
555 }
556
557 kfree(osb->local_system_inodes);
558 osb->local_system_inodes = NULL;
559}
560
561/* We're allocating fs objects, use GFP_NOFS */
562static struct inode *ocfs2_alloc_inode(struct super_block *sb)
563{
564 struct ocfs2_inode_info *oi;
565
566 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
567 if (!oi)
568 return NULL;
569
570 oi->i_sync_tid = 0;
571 oi->i_datasync_tid = 0;
572 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
573
574 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
575 return &oi->vfs_inode;
576}
577
578static void ocfs2_i_callback(struct rcu_head *head)
579{
580 struct inode *inode = container_of(head, struct inode, i_rcu);
581 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
582}
583
584static void ocfs2_destroy_inode(struct inode *inode)
585{
586 call_rcu(&inode->i_rcu, ocfs2_i_callback);
587}
588
589static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
590 unsigned int cbits)
591{
592 unsigned int bytes = 1 << cbits;
593 unsigned int trim = bytes;
594 unsigned int bitshift = 32;
595
596 /*
597 * i_size and all block offsets in ocfs2 are always 64 bits
598 * wide. i_clusters is 32 bits, in cluster-sized units. So on
599 * 64 bit platforms, cluster size will be the limiting factor.
600 */
601
602#if BITS_PER_LONG == 32
603# if defined(CONFIG_LBDAF)
604 BUILD_BUG_ON(sizeof(sector_t) != 8);
605 /*
606 * We might be limited by page cache size.
607 */
608 if (bytes > PAGE_SIZE) {
609 bytes = PAGE_SIZE;
610 trim = 1;
611 /*
612 * Shift by 31 here so that we don't get larger than
613 * MAX_LFS_FILESIZE
614 */
615 bitshift = 31;
616 }
617# else
618 /*
619 * We are limited by the size of sector_t. Use block size, as
620 * that's what we expose to the VFS.
621 */
622 bytes = 1 << bbits;
623 trim = 1;
624 bitshift = 31;
625# endif
626#endif
627
628 /*
629 * Trim by a whole cluster when we can actually approach the
630 * on-disk limits. Otherwise we can overflow i_clusters when
631 * an extent start is at the max offset.
632 */
633 return (((unsigned long long)bytes) << bitshift) - trim;
634}
635
636static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
637{
638 int incompat_features;
639 int ret = 0;
640 struct mount_options parsed_options;
641 struct ocfs2_super *osb = OCFS2_SB(sb);
642 u32 tmp;
643
644 sync_filesystem(sb);
645
646 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
647 !ocfs2_check_set_options(sb, &parsed_options)) {
648 ret = -EINVAL;
649 goto out;
650 }
651
652 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
653 OCFS2_MOUNT_HB_NONE;
654 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
655 ret = -EINVAL;
656 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
657 goto out;
658 }
659
660 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
661 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
662 ret = -EINVAL;
663 mlog(ML_ERROR, "Cannot change data mode on remount\n");
664 goto out;
665 }
666
667 /* Probably don't want this on remount; it might
668 * mess with other nodes */
669 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
670 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
671 ret = -EINVAL;
672 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
673 goto out;
674 }
675
676 /* We're going to/from readonly mode. */
677 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
678 /* Disable quota accounting before remounting RO */
679 if (*flags & MS_RDONLY) {
680 ret = ocfs2_susp_quotas(osb, 0);
681 if (ret < 0)
682 goto out;
683 }
684 /* Lock here so the check of HARD_RO and the potential
685 * setting of SOFT_RO is atomic. */
686 spin_lock(&osb->osb_lock);
687 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
688 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692
693 if (*flags & MS_RDONLY) {
694 sb->s_flags |= MS_RDONLY;
695 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
696 } else {
697 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
698 mlog(ML_ERROR, "Cannot remount RDWR "
699 "filesystem due to previous errors.\n");
700 ret = -EROFS;
701 goto unlock_osb;
702 }
703 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
704 if (incompat_features) {
705 mlog(ML_ERROR, "Cannot remount RDWR because "
706 "of unsupported optional features "
707 "(%x).\n", incompat_features);
708 ret = -EINVAL;
709 goto unlock_osb;
710 }
711 sb->s_flags &= ~MS_RDONLY;
712 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
713 }
714 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
715unlock_osb:
716 spin_unlock(&osb->osb_lock);
717 /* Enable quota accounting after remounting RW */
718 if (!ret && !(*flags & MS_RDONLY)) {
719 if (sb_any_quota_suspended(sb))
720 ret = ocfs2_susp_quotas(osb, 1);
721 else
722 ret = ocfs2_enable_quotas(osb);
723 if (ret < 0) {
724 /* Return back changes... */
725 spin_lock(&osb->osb_lock);
726 sb->s_flags |= MS_RDONLY;
727 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
728 spin_unlock(&osb->osb_lock);
729 goto out;
730 }
731 }
732 }
733
734 if (!ret) {
735 /* Only save off the new mount options in case of a successful
736 * remount. */
737 osb->s_mount_opt = parsed_options.mount_opt;
738 osb->s_atime_quantum = parsed_options.atime_quantum;
739 osb->preferred_slot = parsed_options.slot;
740 if (parsed_options.commit_interval)
741 osb->osb_commit_interval = parsed_options.commit_interval;
742
743 if (!ocfs2_is_hard_readonly(osb))
744 ocfs2_set_journal_params(osb);
745
746 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
748 MS_POSIXACL : 0);
749 }
750out:
751 return ret;
752}
753
754static int ocfs2_sb_probe(struct super_block *sb,
755 struct buffer_head **bh,
756 int *sector_size,
757 struct ocfs2_blockcheck_stats *stats)
758{
759 int status, tmpstat;
760 struct ocfs1_vol_disk_hdr *hdr;
761 struct ocfs2_dinode *di;
762 int blksize;
763
764 *bh = NULL;
765
766 /* may be > 512 */
767 *sector_size = bdev_logical_block_size(sb->s_bdev);
768 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
769 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
770 *sector_size, OCFS2_MAX_BLOCKSIZE);
771 status = -EINVAL;
772 goto bail;
773 }
774
775 /* Can this really happen? */
776 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
777 *sector_size = OCFS2_MIN_BLOCKSIZE;
778
779 /* check block zero for old format */
780 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
781 if (status < 0) {
782 mlog_errno(status);
783 goto bail;
784 }
785 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
786 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
787 mlog(ML_ERROR, "incompatible version: %u.%u\n",
788 hdr->major_version, hdr->minor_version);
789 status = -EINVAL;
790 }
791 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
792 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
793 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
794 hdr->signature);
795 status = -EINVAL;
796 }
797 brelse(*bh);
798 *bh = NULL;
799 if (status < 0) {
800 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
801 "upgraded before mounting with ocfs v2\n");
802 goto bail;
803 }
804
805 /*
806 * Now check at magic offset for 512, 1024, 2048, 4096
807 * blocksizes. 4096 is the maximum blocksize because it is
808 * the minimum clustersize.
809 */
810 status = -EINVAL;
811 for (blksize = *sector_size;
812 blksize <= OCFS2_MAX_BLOCKSIZE;
813 blksize <<= 1) {
814 tmpstat = ocfs2_get_sector(sb, bh,
815 OCFS2_SUPER_BLOCK_BLKNO,
816 blksize);
817 if (tmpstat < 0) {
818 status = tmpstat;
819 mlog_errno(status);
820 break;
821 }
822 di = (struct ocfs2_dinode *) (*bh)->b_data;
823 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
824 spin_lock_init(&stats->b_lock);
825 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
826 if (tmpstat < 0) {
827 brelse(*bh);
828 *bh = NULL;
829 }
830 if (tmpstat != -EAGAIN) {
831 status = tmpstat;
832 break;
833 }
834 }
835
836bail:
837 return status;
838}
839
840static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
841{
842 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
843
844 if (osb->s_mount_opt & hb_enabled) {
845 if (ocfs2_mount_local(osb)) {
846 mlog(ML_ERROR, "Cannot heartbeat on a locally "
847 "mounted device.\n");
848 return -EINVAL;
849 }
850 if (ocfs2_userspace_stack(osb)) {
851 mlog(ML_ERROR, "Userspace stack expected, but "
852 "o2cb heartbeat arguments passed to mount\n");
853 return -EINVAL;
854 }
855 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
856 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
857 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
858 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
859 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
860 return -EINVAL;
861 }
862 }
863
864 if (!(osb->s_mount_opt & hb_enabled)) {
865 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
866 !ocfs2_userspace_stack(osb)) {
867 mlog(ML_ERROR, "Heartbeat has to be started to mount "
868 "a read-write clustered device.\n");
869 return -EINVAL;
870 }
871 }
872
873 return 0;
874}
875
876/*
877 * If we're using a userspace stack, mount should have passed
878 * a name that matches the disk. If not, mount should not
879 * have passed a stack.
880 */
881static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
882 struct mount_options *mopt)
883{
884 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
885 mlog(ML_ERROR,
886 "cluster stack passed to mount, but this filesystem "
887 "does not support it\n");
888 return -EINVAL;
889 }
890
891 if (ocfs2_userspace_stack(osb) &&
892 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
893 OCFS2_STACK_LABEL_LEN)) {
894 mlog(ML_ERROR,
895 "cluster stack passed to mount (\"%s\") does not "
896 "match the filesystem (\"%s\")\n",
897 mopt->cluster_stack,
898 osb->osb_cluster_stack);
899 return -EINVAL;
900 }
901
902 return 0;
903}
904
905static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
906{
907 int type;
908 struct super_block *sb = osb->sb;
909 unsigned int feature[OCFS2_MAXQUOTAS] = {
910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
912 int status = 0;
913
914 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
915 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
916 continue;
917 if (unsuspend)
918 status = dquot_resume(sb, type);
919 else {
920 struct ocfs2_mem_dqinfo *oinfo;
921
922 /* Cancel periodic syncing before suspending */
923 oinfo = sb_dqinfo(sb, type)->dqi_priv;
924 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
925 status = dquot_suspend(sb, type);
926 }
927 if (status < 0)
928 break;
929 }
930 if (status < 0)
931 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
932 "remount (error = %d).\n", status);
933 return status;
934}
935
936static int ocfs2_enable_quotas(struct ocfs2_super *osb)
937{
938 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
939 struct super_block *sb = osb->sb;
940 unsigned int feature[OCFS2_MAXQUOTAS] = {
941 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
942 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
943 unsigned int ino[OCFS2_MAXQUOTAS] = {
944 LOCAL_USER_QUOTA_SYSTEM_INODE,
945 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
946 int status;
947 int type;
948
949 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
952 continue;
953 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
954 osb->slot_num);
955 if (!inode[type]) {
956 status = -ENOENT;
957 goto out_quota_off;
958 }
959 status = dquot_enable(inode[type], type, QFMT_OCFS2,
960 DQUOT_USAGE_ENABLED);
961 if (status < 0)
962 goto out_quota_off;
963 }
964
965 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
966 iput(inode[type]);
967 return 0;
968out_quota_off:
969 ocfs2_disable_quotas(osb);
970 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
971 iput(inode[type]);
972 mlog_errno(status);
973 return status;
974}
975
976static void ocfs2_disable_quotas(struct ocfs2_super *osb)
977{
978 int type;
979 struct inode *inode;
980 struct super_block *sb = osb->sb;
981 struct ocfs2_mem_dqinfo *oinfo;
982
983 /* We mostly ignore errors in this function because there's not much
984 * we can do when we see them */
985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
986 if (!sb_has_quota_loaded(sb, type))
987 continue;
988 /* Cancel periodic syncing before we grab dqonoff_mutex */
989 oinfo = sb_dqinfo(sb, type)->dqi_priv;
990 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
991 inode = igrab(sb->s_dquot.files[type]);
992 /* Turn off quotas. This will remove all dquot structures from
993 * memory and so they will be automatically synced to global
994 * quota files */
995 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
996 DQUOT_LIMITS_ENABLED);
997 if (!inode)
998 continue;
999 iput(inode);
1000 }
1001}
1002
1003static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1004{
1005 struct dentry *root;
1006 int status, sector_size;
1007 struct mount_options parsed_options;
1008 struct inode *inode = NULL;
1009 struct ocfs2_super *osb = NULL;
1010 struct buffer_head *bh = NULL;
1011 char nodestr[12];
1012 struct ocfs2_blockcheck_stats stats;
1013
1014 trace_ocfs2_fill_super(sb, data, silent);
1015
1016 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1017 status = -EINVAL;
1018 goto read_super_error;
1019 }
1020
1021 /* probe for superblock */
1022 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
1023 if (status < 0) {
1024 mlog(ML_ERROR, "superblock probe failed!\n");
1025 goto read_super_error;
1026 }
1027
1028 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1029 osb = OCFS2_SB(sb);
1030 if (status < 0) {
1031 mlog_errno(status);
1032 goto read_super_error;
1033 }
1034 brelse(bh);
1035 bh = NULL;
1036
1037 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1038 status = -EINVAL;
1039 goto read_super_error;
1040 }
1041 osb->s_mount_opt = parsed_options.mount_opt;
1042 osb->s_atime_quantum = parsed_options.atime_quantum;
1043 osb->preferred_slot = parsed_options.slot;
1044 osb->osb_commit_interval = parsed_options.commit_interval;
1045
1046 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1047 osb->osb_resv_level = parsed_options.resv_level;
1048 osb->osb_dir_resv_level = parsed_options.resv_level;
1049 if (parsed_options.dir_resv_level == -1)
1050 osb->osb_dir_resv_level = parsed_options.resv_level;
1051 else
1052 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1053
1054 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1055 if (status)
1056 goto read_super_error;
1057
1058 sb->s_magic = OCFS2_SUPER_MAGIC;
1059
1060 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1061 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1062
1063 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1064 * heartbeat=none */
1065 if (bdev_read_only(sb->s_bdev)) {
1066 if (!(sb->s_flags & MS_RDONLY)) {
1067 status = -EACCES;
1068 mlog(ML_ERROR, "Readonly device detected but readonly "
1069 "mount was not specified.\n");
1070 goto read_super_error;
1071 }
1072
1073 /* You should not be able to start a local heartbeat
1074 * on a readonly device. */
1075 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1076 status = -EROFS;
1077 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1078 "device.\n");
1079 goto read_super_error;
1080 }
1081
1082 status = ocfs2_check_journals_nolocks(osb);
1083 if (status < 0) {
1084 if (status == -EROFS)
1085 mlog(ML_ERROR, "Recovery required on readonly "
1086 "file system, but write access is "
1087 "unavailable.\n");
1088 else
1089 mlog_errno(status);
1090 goto read_super_error;
1091 }
1092
1093 ocfs2_set_ro_flag(osb, 1);
1094
1095 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1096 "Cluster services will not be used for this mount. "
1097 "Recovery will be skipped.\n", osb->dev_str);
1098 }
1099
1100 if (!ocfs2_is_hard_readonly(osb)) {
1101 if (sb->s_flags & MS_RDONLY)
1102 ocfs2_set_ro_flag(osb, 0);
1103 }
1104
1105 status = ocfs2_verify_heartbeat(osb);
1106 if (status < 0) {
1107 mlog_errno(status);
1108 goto read_super_error;
1109 }
1110
1111 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1112 ocfs2_debugfs_root);
1113 if (!osb->osb_debug_root) {
1114 status = -EINVAL;
1115 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1116 goto read_super_error;
1117 }
1118
1119 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1120 osb->osb_debug_root,
1121 osb,
1122 &ocfs2_osb_debug_fops);
1123 if (!osb->osb_ctxt) {
1124 status = -EINVAL;
1125 mlog_errno(status);
1126 goto read_super_error;
1127 }
1128
1129 if (ocfs2_meta_ecc(osb)) {
1130 status = ocfs2_blockcheck_stats_debugfs_install(
1131 &osb->osb_ecc_stats,
1132 osb->osb_debug_root);
1133 if (status) {
1134 mlog(ML_ERROR,
1135 "Unable to create blockcheck statistics "
1136 "files\n");
1137 goto read_super_error;
1138 }
1139 }
1140
1141 status = ocfs2_mount_volume(sb);
1142 if (status < 0)
1143 goto read_super_error;
1144
1145 if (osb->root_inode)
1146 inode = igrab(osb->root_inode);
1147
1148 if (!inode) {
1149 status = -EIO;
1150 mlog_errno(status);
1151 goto read_super_error;
1152 }
1153
1154 root = d_make_root(inode);
1155 if (!root) {
1156 status = -ENOMEM;
1157 mlog_errno(status);
1158 goto read_super_error;
1159 }
1160
1161 sb->s_root = root;
1162
1163 ocfs2_complete_mount_recovery(osb);
1164
1165 if (ocfs2_mount_local(osb))
1166 snprintf(nodestr, sizeof(nodestr), "local");
1167 else
1168 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1169
1170 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1171 "with %s data mode.\n",
1172 osb->dev_str, nodestr, osb->slot_num,
1173 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1174 "ordered");
1175
1176 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1177 wake_up(&osb->osb_mount_event);
1178
1179 /* Now we can initialize quotas because we can afford to wait
1180 * for cluster locks recovery now. That also means that truncation
1181 * log recovery can happen but that waits for proper quota setup */
1182 if (!(sb->s_flags & MS_RDONLY)) {
1183 status = ocfs2_enable_quotas(osb);
1184 if (status < 0) {
1185 /* We have to err-out specially here because
1186 * s_root is already set */
1187 mlog_errno(status);
1188 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1189 wake_up(&osb->osb_mount_event);
1190 return status;
1191 }
1192 }
1193
1194 ocfs2_complete_quota_recovery(osb);
1195
1196 /* Now we wake up again for processes waiting for quotas */
1197 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1198 wake_up(&osb->osb_mount_event);
1199
1200 /* Start this when the mount is almost sure of being successful */
1201 ocfs2_orphan_scan_start(osb);
1202
1203 /* Create filecheck sysfile /sys/fs/ocfs2/<devname>/filecheck */
1204 ocfs2_filecheck_create_sysfs(sb);
1205
1206 return status;
1207
1208read_super_error:
1209 brelse(bh);
1210
1211 if (osb) {
1212 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1213 wake_up(&osb->osb_mount_event);
1214 ocfs2_dismount_volume(sb, 1);
1215 }
1216
1217 if (status)
1218 mlog_errno(status);
1219 return status;
1220}
1221
1222static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1223 int flags,
1224 const char *dev_name,
1225 void *data)
1226{
1227 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1228}
1229
1230static struct file_system_type ocfs2_fs_type = {
1231 .owner = THIS_MODULE,
1232 .name = "ocfs2",
1233 .mount = ocfs2_mount,
1234 .kill_sb = kill_block_super,
1235 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1236 .next = NULL
1237};
1238MODULE_ALIAS_FS("ocfs2");
1239
1240static int ocfs2_check_set_options(struct super_block *sb,
1241 struct mount_options *options)
1242{
1243 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1244 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1245 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1246 mlog(ML_ERROR, "User quotas were requested, but this "
1247 "filesystem does not have the feature enabled.\n");
1248 return 0;
1249 }
1250 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1251 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1252 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1253 mlog(ML_ERROR, "Group quotas were requested, but this "
1254 "filesystem does not have the feature enabled.\n");
1255 return 0;
1256 }
1257 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1258 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1259 mlog(ML_ERROR, "ACL support requested but extended attributes "
1260 "feature is not enabled\n");
1261 return 0;
1262 }
1263 /* No ACL setting specified? Use XATTR feature... */
1264 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1265 OCFS2_MOUNT_NO_POSIX_ACL))) {
1266 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1267 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1268 else
1269 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1270 }
1271 return 1;
1272}
1273
1274static int ocfs2_parse_options(struct super_block *sb,
1275 char *options,
1276 struct mount_options *mopt,
1277 int is_remount)
1278{
1279 int status, user_stack = 0;
1280 char *p;
1281 u32 tmp;
1282 int token, option;
1283 substring_t args[MAX_OPT_ARGS];
1284
1285 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1286
1287 mopt->commit_interval = 0;
1288 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1289 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1290 mopt->slot = OCFS2_INVALID_SLOT;
1291 mopt->localalloc_opt = -1;
1292 mopt->cluster_stack[0] = '\0';
1293 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1294 mopt->dir_resv_level = -1;
1295
1296 if (!options) {
1297 status = 1;
1298 goto bail;
1299 }
1300
1301 while ((p = strsep(&options, ",")) != NULL) {
1302 if (!*p)
1303 continue;
1304
1305 token = match_token(p, tokens, args);
1306 switch (token) {
1307 case Opt_hb_local:
1308 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1309 break;
1310 case Opt_hb_none:
1311 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1312 break;
1313 case Opt_hb_global:
1314 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1315 break;
1316 case Opt_barrier:
1317 if (match_int(&args[0], &option)) {
1318 status = 0;
1319 goto bail;
1320 }
1321 if (option)
1322 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1323 else
1324 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1325 break;
1326 case Opt_intr:
1327 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1328 break;
1329 case Opt_nointr:
1330 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1331 break;
1332 case Opt_err_panic:
1333 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1334 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1335 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1336 break;
1337 case Opt_err_ro:
1338 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1339 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1340 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1341 break;
1342 case Opt_err_cont:
1343 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1344 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1345 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1346 break;
1347 case Opt_data_ordered:
1348 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1349 break;
1350 case Opt_data_writeback:
1351 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1352 break;
1353 case Opt_user_xattr:
1354 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1355 break;
1356 case Opt_nouser_xattr:
1357 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1358 break;
1359 case Opt_atime_quantum:
1360 if (match_int(&args[0], &option)) {
1361 status = 0;
1362 goto bail;
1363 }
1364 if (option >= 0)
1365 mopt->atime_quantum = option;
1366 break;
1367 case Opt_slot:
1368 if (match_int(&args[0], &option)) {
1369 status = 0;
1370 goto bail;
1371 }
1372 if (option)
1373 mopt->slot = (s16)option;
1374 break;
1375 case Opt_commit:
1376 if (match_int(&args[0], &option)) {
1377 status = 0;
1378 goto bail;
1379 }
1380 if (option < 0)
1381 return 0;
1382 if (option == 0)
1383 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1384 mopt->commit_interval = HZ * option;
1385 break;
1386 case Opt_localalloc:
1387 if (match_int(&args[0], &option)) {
1388 status = 0;
1389 goto bail;
1390 }
1391 if (option >= 0)
1392 mopt->localalloc_opt = option;
1393 break;
1394 case Opt_localflocks:
1395 /*
1396 * Changing this during remount could race
1397 * flock() requests, or "unbalance" existing
1398 * ones (e.g., a lock is taken in one mode but
1399 * dropped in the other). If users care enough
1400 * to flip locking modes during remount, we
1401 * could add a "local" flag to individual
1402 * flock structures for proper tracking of
1403 * state.
1404 */
1405 if (!is_remount)
1406 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1407 break;
1408 case Opt_stack:
1409 /* Check both that the option we were passed
1410 * is of the right length and that it is a proper
1411 * string of the right length.
1412 */
1413 if (((args[0].to - args[0].from) !=
1414 OCFS2_STACK_LABEL_LEN) ||
1415 (strnlen(args[0].from,
1416 OCFS2_STACK_LABEL_LEN) !=
1417 OCFS2_STACK_LABEL_LEN)) {
1418 mlog(ML_ERROR,
1419 "Invalid cluster_stack option\n");
1420 status = 0;
1421 goto bail;
1422 }
1423 memcpy(mopt->cluster_stack, args[0].from,
1424 OCFS2_STACK_LABEL_LEN);
1425 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1426 /*
1427 * Open code the memcmp here as we don't have
1428 * an osb to pass to
1429 * ocfs2_userspace_stack().
1430 */
1431 if (memcmp(mopt->cluster_stack,
1432 OCFS2_CLASSIC_CLUSTER_STACK,
1433 OCFS2_STACK_LABEL_LEN))
1434 user_stack = 1;
1435 break;
1436 case Opt_inode64:
1437 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1438 break;
1439 case Opt_usrquota:
1440 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1441 break;
1442 case Opt_grpquota:
1443 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1444 break;
1445 case Opt_coherency_buffered:
1446 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1447 break;
1448 case Opt_coherency_full:
1449 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1450 break;
1451 case Opt_acl:
1452 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1453 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1454 break;
1455 case Opt_noacl:
1456 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1457 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1458 break;
1459 case Opt_resv_level:
1460 if (is_remount)
1461 break;
1462 if (match_int(&args[0], &option)) {
1463 status = 0;
1464 goto bail;
1465 }
1466 if (option >= OCFS2_MIN_RESV_LEVEL &&
1467 option < OCFS2_MAX_RESV_LEVEL)
1468 mopt->resv_level = option;
1469 break;
1470 case Opt_dir_resv_level:
1471 if (is_remount)
1472 break;
1473 if (match_int(&args[0], &option)) {
1474 status = 0;
1475 goto bail;
1476 }
1477 if (option >= OCFS2_MIN_RESV_LEVEL &&
1478 option < OCFS2_MAX_RESV_LEVEL)
1479 mopt->dir_resv_level = option;
1480 break;
1481 case Opt_journal_async_commit:
1482 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1483 break;
1484 default:
1485 mlog(ML_ERROR,
1486 "Unrecognized mount option \"%s\" "
1487 "or missing value\n", p);
1488 status = 0;
1489 goto bail;
1490 }
1491 }
1492
1493 if (user_stack == 0) {
1494 /* Ensure only one heartbeat mode */
1495 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1496 OCFS2_MOUNT_HB_GLOBAL |
1497 OCFS2_MOUNT_HB_NONE);
1498 if (hweight32(tmp) != 1) {
1499 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1500 status = 0;
1501 goto bail;
1502 }
1503 }
1504
1505 status = 1;
1506
1507bail:
1508 return status;
1509}
1510
1511static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1512{
1513 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1514 unsigned long opts = osb->s_mount_opt;
1515 unsigned int local_alloc_megs;
1516
1517 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1518 seq_printf(s, ",_netdev");
1519 if (opts & OCFS2_MOUNT_HB_LOCAL)
1520 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1521 else
1522 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1523 } else
1524 seq_printf(s, ",%s", OCFS2_HB_NONE);
1525
1526 if (opts & OCFS2_MOUNT_NOINTR)
1527 seq_printf(s, ",nointr");
1528
1529 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1530 seq_printf(s, ",data=writeback");
1531 else
1532 seq_printf(s, ",data=ordered");
1533
1534 if (opts & OCFS2_MOUNT_BARRIER)
1535 seq_printf(s, ",barrier=1");
1536
1537 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1538 seq_printf(s, ",errors=panic");
1539 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1540 seq_printf(s, ",errors=continue");
1541 else
1542 seq_printf(s, ",errors=remount-ro");
1543
1544 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1545 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1546
1547 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1548
1549 if (osb->osb_commit_interval)
1550 seq_printf(s, ",commit=%u",
1551 (unsigned) (osb->osb_commit_interval / HZ));
1552
1553 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1554 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1555 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1556
1557 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1558 seq_printf(s, ",localflocks,");
1559
1560 if (osb->osb_cluster_stack[0])
1561 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1562 OCFS2_STACK_LABEL_LEN);
1563 if (opts & OCFS2_MOUNT_USRQUOTA)
1564 seq_printf(s, ",usrquota");
1565 if (opts & OCFS2_MOUNT_GRPQUOTA)
1566 seq_printf(s, ",grpquota");
1567
1568 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1569 seq_printf(s, ",coherency=buffered");
1570 else
1571 seq_printf(s, ",coherency=full");
1572
1573 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1574 seq_printf(s, ",nouser_xattr");
1575 else
1576 seq_printf(s, ",user_xattr");
1577
1578 if (opts & OCFS2_MOUNT_INODE64)
1579 seq_printf(s, ",inode64");
1580
1581 if (opts & OCFS2_MOUNT_POSIX_ACL)
1582 seq_printf(s, ",acl");
1583 else
1584 seq_printf(s, ",noacl");
1585
1586 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1587 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1588
1589 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1590 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1591
1592 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1593 seq_printf(s, ",journal_async_commit");
1594
1595 return 0;
1596}
1597
1598static int __init ocfs2_init(void)
1599{
1600 int status;
1601
1602 status = init_ocfs2_uptodate_cache();
1603 if (status < 0)
1604 goto out1;
1605
1606 status = ocfs2_initialize_mem_caches();
1607 if (status < 0)
1608 goto out2;
1609
1610 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1611 if (!ocfs2_debugfs_root) {
1612 status = -ENOMEM;
1613 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1614 goto out3;
1615 }
1616
1617 ocfs2_set_locking_protocol();
1618
1619 status = register_quota_format(&ocfs2_quota_format);
1620 if (status < 0)
1621 goto out3;
1622 status = register_filesystem(&ocfs2_fs_type);
1623 if (!status)
1624 return 0;
1625
1626 unregister_quota_format(&ocfs2_quota_format);
1627out3:
1628 debugfs_remove(ocfs2_debugfs_root);
1629 ocfs2_free_mem_caches();
1630out2:
1631 exit_ocfs2_uptodate_cache();
1632out1:
1633 mlog_errno(status);
1634 return status;
1635}
1636
1637static void __exit ocfs2_exit(void)
1638{
1639 unregister_quota_format(&ocfs2_quota_format);
1640
1641 debugfs_remove(ocfs2_debugfs_root);
1642
1643 ocfs2_free_mem_caches();
1644
1645 unregister_filesystem(&ocfs2_fs_type);
1646
1647 exit_ocfs2_uptodate_cache();
1648}
1649
1650static void ocfs2_put_super(struct super_block *sb)
1651{
1652 trace_ocfs2_put_super(sb);
1653
1654 ocfs2_sync_blockdev(sb);
1655 ocfs2_dismount_volume(sb, 0);
1656 ocfs2_filecheck_remove_sysfs(sb);
1657}
1658
1659static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1660{
1661 struct ocfs2_super *osb;
1662 u32 numbits, freebits;
1663 int status;
1664 struct ocfs2_dinode *bm_lock;
1665 struct buffer_head *bh = NULL;
1666 struct inode *inode = NULL;
1667
1668 trace_ocfs2_statfs(dentry->d_sb, buf);
1669
1670 osb = OCFS2_SB(dentry->d_sb);
1671
1672 inode = ocfs2_get_system_file_inode(osb,
1673 GLOBAL_BITMAP_SYSTEM_INODE,
1674 OCFS2_INVALID_SLOT);
1675 if (!inode) {
1676 mlog(ML_ERROR, "failed to get bitmap inode\n");
1677 status = -EIO;
1678 goto bail;
1679 }
1680
1681 status = ocfs2_inode_lock(inode, &bh, 0);
1682 if (status < 0) {
1683 mlog_errno(status);
1684 goto bail;
1685 }
1686
1687 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1688
1689 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1690 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1691
1692 buf->f_type = OCFS2_SUPER_MAGIC;
1693 buf->f_bsize = dentry->d_sb->s_blocksize;
1694 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1695 buf->f_blocks = ((sector_t) numbits) *
1696 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1697 buf->f_bfree = ((sector_t) freebits) *
1698 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1699 buf->f_bavail = buf->f_bfree;
1700 buf->f_files = numbits;
1701 buf->f_ffree = freebits;
1702 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1703 & 0xFFFFFFFFUL;
1704 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1705 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1706
1707 brelse(bh);
1708
1709 ocfs2_inode_unlock(inode, 0);
1710 status = 0;
1711bail:
1712 iput(inode);
1713
1714 if (status)
1715 mlog_errno(status);
1716
1717 return status;
1718}
1719
1720static void ocfs2_inode_init_once(void *data)
1721{
1722 struct ocfs2_inode_info *oi = data;
1723
1724 oi->ip_flags = 0;
1725 oi->ip_open_count = 0;
1726 spin_lock_init(&oi->ip_lock);
1727 ocfs2_extent_map_init(&oi->vfs_inode);
1728 INIT_LIST_HEAD(&oi->ip_io_markers);
1729 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1730 oi->ip_dir_start_lookup = 0;
1731 init_rwsem(&oi->ip_alloc_sem);
1732 init_rwsem(&oi->ip_xattr_sem);
1733 mutex_init(&oi->ip_io_mutex);
1734
1735 oi->ip_blkno = 0ULL;
1736 oi->ip_clusters = 0;
1737
1738 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1739
1740 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1741 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1742 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1743
1744 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1745 &ocfs2_inode_caching_ops);
1746
1747 inode_init_once(&oi->vfs_inode);
1748}
1749
1750static int ocfs2_initialize_mem_caches(void)
1751{
1752 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1753 sizeof(struct ocfs2_inode_info),
1754 0,
1755 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1756 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1757 ocfs2_inode_init_once);
1758 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1759 sizeof(struct ocfs2_dquot),
1760 0,
1761 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1762 SLAB_MEM_SPREAD),
1763 NULL);
1764 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1765 sizeof(struct ocfs2_quota_chunk),
1766 0,
1767 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1768 NULL);
1769 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1770 !ocfs2_qf_chunk_cachep) {
1771 if (ocfs2_inode_cachep)
1772 kmem_cache_destroy(ocfs2_inode_cachep);
1773 if (ocfs2_dquot_cachep)
1774 kmem_cache_destroy(ocfs2_dquot_cachep);
1775 if (ocfs2_qf_chunk_cachep)
1776 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1777 return -ENOMEM;
1778 }
1779
1780 return 0;
1781}
1782
1783static void ocfs2_free_mem_caches(void)
1784{
1785 /*
1786 * Make sure all delayed rcu free inodes are flushed before we
1787 * destroy cache.
1788 */
1789 rcu_barrier();
1790 if (ocfs2_inode_cachep)
1791 kmem_cache_destroy(ocfs2_inode_cachep);
1792 ocfs2_inode_cachep = NULL;
1793
1794 if (ocfs2_dquot_cachep)
1795 kmem_cache_destroy(ocfs2_dquot_cachep);
1796 ocfs2_dquot_cachep = NULL;
1797
1798 if (ocfs2_qf_chunk_cachep)
1799 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1800 ocfs2_qf_chunk_cachep = NULL;
1801}
1802
1803static int ocfs2_get_sector(struct super_block *sb,
1804 struct buffer_head **bh,
1805 int block,
1806 int sect_size)
1807{
1808 if (!sb_set_blocksize(sb, sect_size)) {
1809 mlog(ML_ERROR, "unable to set blocksize\n");
1810 return -EIO;
1811 }
1812
1813 *bh = sb_getblk(sb, block);
1814 if (!*bh) {
1815 mlog_errno(-ENOMEM);
1816 return -ENOMEM;
1817 }
1818 lock_buffer(*bh);
1819 if (!buffer_dirty(*bh))
1820 clear_buffer_uptodate(*bh);
1821 unlock_buffer(*bh);
1822 ll_rw_block(READ, 1, bh);
1823 wait_on_buffer(*bh);
1824 if (!buffer_uptodate(*bh)) {
1825 mlog_errno(-EIO);
1826 brelse(*bh);
1827 *bh = NULL;
1828 return -EIO;
1829 }
1830
1831 return 0;
1832}
1833
1834static int ocfs2_mount_volume(struct super_block *sb)
1835{
1836 int status = 0;
1837 int unlock_super = 0;
1838 struct ocfs2_super *osb = OCFS2_SB(sb);
1839
1840 if (ocfs2_is_hard_readonly(osb))
1841 goto leave;
1842
1843 status = ocfs2_dlm_init(osb);
1844 if (status < 0) {
1845 mlog_errno(status);
1846 goto leave;
1847 }
1848
1849 status = ocfs2_super_lock(osb, 1);
1850 if (status < 0) {
1851 mlog_errno(status);
1852 goto leave;
1853 }
1854 unlock_super = 1;
1855
1856 /* This will load up the node map and add ourselves to it. */
1857 status = ocfs2_find_slot(osb);
1858 if (status < 0) {
1859 mlog_errno(status);
1860 goto leave;
1861 }
1862
1863 /* load all node-local system inodes */
1864 status = ocfs2_init_local_system_inodes(osb);
1865 if (status < 0) {
1866 mlog_errno(status);
1867 goto leave;
1868 }
1869
1870 status = ocfs2_check_volume(osb);
1871 if (status < 0) {
1872 mlog_errno(status);
1873 goto leave;
1874 }
1875
1876 status = ocfs2_truncate_log_init(osb);
1877 if (status < 0)
1878 mlog_errno(status);
1879
1880leave:
1881 if (unlock_super)
1882 ocfs2_super_unlock(osb, 1);
1883
1884 return status;
1885}
1886
1887static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1888{
1889 int tmp, hangup_needed = 0;
1890 struct ocfs2_super *osb = NULL;
1891 char nodestr[12];
1892
1893 trace_ocfs2_dismount_volume(sb);
1894
1895 BUG_ON(!sb);
1896 osb = OCFS2_SB(sb);
1897 BUG_ON(!osb);
1898
1899 debugfs_remove(osb->osb_ctxt);
1900
1901 /* Orphan scan should be stopped as early as possible */
1902 ocfs2_orphan_scan_stop(osb);
1903
1904 ocfs2_disable_quotas(osb);
1905
1906 /* All dquots should be freed by now */
1907 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1908 /* Wait for worker to be done with the work structure in osb */
1909 cancel_work_sync(&osb->dquot_drop_work);
1910
1911 ocfs2_shutdown_local_alloc(osb);
1912
1913 ocfs2_truncate_log_shutdown(osb);
1914
1915 /* This will disable recovery and flush any recovery work. */
1916 ocfs2_recovery_exit(osb);
1917
1918 ocfs2_journal_shutdown(osb);
1919
1920 ocfs2_sync_blockdev(sb);
1921
1922 ocfs2_purge_refcount_trees(osb);
1923
1924 /* No cluster connection means we've failed during mount, so skip
1925 * all the steps which depended on that to complete. */
1926 if (osb->cconn) {
1927 tmp = ocfs2_super_lock(osb, 1);
1928 if (tmp < 0) {
1929 mlog_errno(tmp);
1930 return;
1931 }
1932 }
1933
1934 if (osb->slot_num != OCFS2_INVALID_SLOT)
1935 ocfs2_put_slot(osb);
1936
1937 if (osb->cconn)
1938 ocfs2_super_unlock(osb, 1);
1939
1940 ocfs2_release_system_inodes(osb);
1941
1942 /*
1943 * If we're dismounting due to mount error, mount.ocfs2 will clean
1944 * up heartbeat. If we're a local mount, there is no heartbeat.
1945 * If we failed before we got a uuid_str yet, we can't stop
1946 * heartbeat. Otherwise, do it.
1947 */
1948 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1949 !ocfs2_is_hard_readonly(osb))
1950 hangup_needed = 1;
1951
1952 if (osb->cconn)
1953 ocfs2_dlm_shutdown(osb, hangup_needed);
1954
1955 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1956 debugfs_remove(osb->osb_debug_root);
1957
1958 if (hangup_needed)
1959 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1960
1961 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1962
1963 if (ocfs2_mount_local(osb))
1964 snprintf(nodestr, sizeof(nodestr), "local");
1965 else
1966 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1967
1968 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1969 osb->dev_str, nodestr);
1970
1971 ocfs2_delete_osb(osb);
1972 kfree(osb);
1973 sb->s_dev = 0;
1974 sb->s_fs_info = NULL;
1975}
1976
1977static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1978 unsigned uuid_bytes)
1979{
1980 int i, ret;
1981 char *ptr;
1982
1983 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1984
1985 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1986 if (osb->uuid_str == NULL)
1987 return -ENOMEM;
1988
1989 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1990 /* print with null */
1991 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1992 if (ret != 2) /* drop super cleans up */
1993 return -EINVAL;
1994 /* then only advance past the last char */
1995 ptr += 2;
1996 }
1997
1998 return 0;
1999}
2000
2001/* Make sure entire volume is addressable by our journal. Requires
2002 osb_clusters_at_boot to be valid and for the journal to have been
2003 initialized by ocfs2_journal_init(). */
2004static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2005{
2006 int status = 0;
2007 u64 max_block =
2008 ocfs2_clusters_to_blocks(osb->sb,
2009 osb->osb_clusters_at_boot) - 1;
2010
2011 /* 32-bit block number is always OK. */
2012 if (max_block <= (u32)~0ULL)
2013 goto out;
2014
2015 /* Volume is "huge", so see if our journal is new enough to
2016 support it. */
2017 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2018 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2019 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2020 JBD2_FEATURE_INCOMPAT_64BIT))) {
2021 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2022 "Enable the 'block64' journal option with tunefs.ocfs2");
2023 status = -EFBIG;
2024 goto out;
2025 }
2026
2027 out:
2028 return status;
2029}
2030
2031static int ocfs2_initialize_super(struct super_block *sb,
2032 struct buffer_head *bh,
2033 int sector_size,
2034 struct ocfs2_blockcheck_stats *stats)
2035{
2036 int status;
2037 int i, cbits, bbits;
2038 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2039 struct inode *inode = NULL;
2040 struct ocfs2_journal *journal;
2041 struct ocfs2_super *osb;
2042 u64 total_blocks;
2043
2044 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2045 if (!osb) {
2046 status = -ENOMEM;
2047 mlog_errno(status);
2048 goto bail;
2049 }
2050
2051 sb->s_fs_info = osb;
2052 sb->s_op = &ocfs2_sops;
2053 sb->s_d_op = &ocfs2_dentry_ops;
2054 sb->s_export_op = &ocfs2_export_ops;
2055 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2056 sb->dq_op = &ocfs2_quota_operations;
2057 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2058 sb->s_xattr = ocfs2_xattr_handlers;
2059 sb->s_time_gran = 1;
2060 sb->s_flags |= MS_NOATIME;
2061 /* this is needed to support O_LARGEFILE */
2062 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2063 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2064 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2065 memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
2066 sizeof(di->id2.i_super.s_uuid));
2067
2068 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2069
2070 for (i = 0; i < 3; i++)
2071 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2072 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2073
2074 osb->sb = sb;
2075 /* Save off for ocfs2_rw_direct */
2076 osb->s_sectsize_bits = blksize_bits(sector_size);
2077 BUG_ON(!osb->s_sectsize_bits);
2078
2079 spin_lock_init(&osb->dc_task_lock);
2080 init_waitqueue_head(&osb->dc_event);
2081 osb->dc_work_sequence = 0;
2082 osb->dc_wake_sequence = 0;
2083 INIT_LIST_HEAD(&osb->blocked_lock_list);
2084 osb->blocked_lock_count = 0;
2085 spin_lock_init(&osb->osb_lock);
2086 spin_lock_init(&osb->osb_xattr_lock);
2087 ocfs2_init_steal_slots(osb);
2088
2089 mutex_init(&osb->system_file_mutex);
2090
2091 atomic_set(&osb->alloc_stats.moves, 0);
2092 atomic_set(&osb->alloc_stats.local_data, 0);
2093 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2094 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2095 atomic_set(&osb->alloc_stats.bg_extends, 0);
2096
2097 /* Copy the blockcheck stats from the superblock probe */
2098 osb->osb_ecc_stats = *stats;
2099
2100 ocfs2_init_node_maps(osb);
2101
2102 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2103 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2104
2105 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2106 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2107 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2108 osb->max_slots);
2109 status = -EINVAL;
2110 goto bail;
2111 }
2112
2113 ocfs2_orphan_scan_init(osb);
2114
2115 status = ocfs2_recovery_init(osb);
2116 if (status) {
2117 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2118 mlog_errno(status);
2119 goto bail;
2120 }
2121
2122 init_waitqueue_head(&osb->checkpoint_event);
2123
2124 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2125
2126 osb->slot_num = OCFS2_INVALID_SLOT;
2127
2128 osb->s_xattr_inline_size = le16_to_cpu(
2129 di->id2.i_super.s_xattr_inline_size);
2130
2131 osb->local_alloc_state = OCFS2_LA_UNUSED;
2132 osb->local_alloc_bh = NULL;
2133 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2134
2135 init_waitqueue_head(&osb->osb_mount_event);
2136
2137 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2138 if (status) {
2139 mlog_errno(status);
2140 goto bail;
2141 }
2142
2143 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2144 if (!osb->vol_label) {
2145 mlog(ML_ERROR, "unable to alloc vol label\n");
2146 status = -ENOMEM;
2147 goto bail;
2148 }
2149
2150 osb->slot_recovery_generations =
2151 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2152 GFP_KERNEL);
2153 if (!osb->slot_recovery_generations) {
2154 status = -ENOMEM;
2155 mlog_errno(status);
2156 goto bail;
2157 }
2158
2159 init_waitqueue_head(&osb->osb_wipe_event);
2160 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2161 sizeof(*osb->osb_orphan_wipes),
2162 GFP_KERNEL);
2163 if (!osb->osb_orphan_wipes) {
2164 status = -ENOMEM;
2165 mlog_errno(status);
2166 goto bail;
2167 }
2168
2169 osb->osb_rf_lock_tree = RB_ROOT;
2170
2171 osb->s_feature_compat =
2172 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2173 osb->s_feature_ro_compat =
2174 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2175 osb->s_feature_incompat =
2176 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2177
2178 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2179 mlog(ML_ERROR, "couldn't mount because of unsupported "
2180 "optional features (%x).\n", i);
2181 status = -EINVAL;
2182 goto bail;
2183 }
2184 if (!(osb->sb->s_flags & MS_RDONLY) &&
2185 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2186 mlog(ML_ERROR, "couldn't mount RDWR because of "
2187 "unsupported optional features (%x).\n", i);
2188 status = -EINVAL;
2189 goto bail;
2190 }
2191
2192 if (ocfs2_clusterinfo_valid(osb)) {
2193 osb->osb_stackflags =
2194 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2195 strlcpy(osb->osb_cluster_stack,
2196 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2197 OCFS2_STACK_LABEL_LEN + 1);
2198 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2199 mlog(ML_ERROR,
2200 "couldn't mount because of an invalid "
2201 "cluster stack label (%s) \n",
2202 osb->osb_cluster_stack);
2203 status = -EINVAL;
2204 goto bail;
2205 }
2206 strlcpy(osb->osb_cluster_name,
2207 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2208 OCFS2_CLUSTER_NAME_LEN + 1);
2209 } else {
2210 /* The empty string is identical with classic tools that
2211 * don't know about s_cluster_info. */
2212 osb->osb_cluster_stack[0] = '\0';
2213 }
2214
2215 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2216
2217 /* FIXME
2218 * This should be done in ocfs2_journal_init(), but unknown
2219 * ordering issues will cause the filesystem to crash.
2220 * If anyone wants to figure out what part of the code
2221 * refers to osb->journal before ocfs2_journal_init() is run,
2222 * be my guest.
2223 */
2224 /* initialize our journal structure */
2225
2226 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2227 if (!journal) {
2228 mlog(ML_ERROR, "unable to alloc journal\n");
2229 status = -ENOMEM;
2230 goto bail;
2231 }
2232 osb->journal = journal;
2233 journal->j_osb = osb;
2234
2235 atomic_set(&journal->j_num_trans, 0);
2236 init_rwsem(&journal->j_trans_barrier);
2237 init_waitqueue_head(&journal->j_checkpointed);
2238 spin_lock_init(&journal->j_lock);
2239 journal->j_trans_id = (unsigned long) 1;
2240 INIT_LIST_HEAD(&journal->j_la_cleanups);
2241 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2242 journal->j_state = OCFS2_JOURNAL_FREE;
2243
2244 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2245 init_llist_head(&osb->dquot_drop_list);
2246
2247 /* get some pseudo constants for clustersize bits */
2248 osb->s_clustersize_bits =
2249 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2250 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2251
2252 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2253 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2254 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2255 osb->s_clustersize);
2256 status = -EINVAL;
2257 goto bail;
2258 }
2259
2260 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2261 le32_to_cpu(di->i_clusters));
2262
2263 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2264 total_blocks);
2265 if (status) {
2266 mlog(ML_ERROR, "Volume too large "
2267 "to mount safely on this system");
2268 status = -EFBIG;
2269 goto bail;
2270 }
2271
2272 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2273 sizeof(di->id2.i_super.s_uuid))) {
2274 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2275 status = -ENOMEM;
2276 goto bail;
2277 }
2278
2279 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2280 OCFS2_MAX_VOL_LABEL_LEN);
2281 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2282 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2283 osb->first_cluster_group_blkno =
2284 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2285 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2286 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2287 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2288 (unsigned long long)osb->root_blkno,
2289 (unsigned long long)osb->system_dir_blkno,
2290 osb->s_clustersize_bits);
2291
2292 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2293 if (!osb->osb_dlm_debug) {
2294 status = -ENOMEM;
2295 mlog_errno(status);
2296 goto bail;
2297 }
2298
2299 atomic_set(&osb->vol_state, VOLUME_INIT);
2300
2301 /* load root, system_dir, and all global system inodes */
2302 status = ocfs2_init_global_system_inodes(osb);
2303 if (status < 0) {
2304 mlog_errno(status);
2305 goto bail;
2306 }
2307
2308 /*
2309 * global bitmap
2310 */
2311 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2312 OCFS2_INVALID_SLOT);
2313 if (!inode) {
2314 status = -EINVAL;
2315 mlog_errno(status);
2316 goto bail;
2317 }
2318
2319 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2320 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2321 iput(inode);
2322
2323 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2324 osb->s_feature_incompat) * 8;
2325
2326 status = ocfs2_init_slot_info(osb);
2327 if (status < 0) {
2328 mlog_errno(status);
2329 goto bail;
2330 }
2331 cleancache_init_shared_fs(sb);
2332
2333 osb->ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
2334 if (!osb->ocfs2_wq) {
2335 status = -ENOMEM;
2336 mlog_errno(status);
2337 }
2338
2339bail:
2340 return status;
2341}
2342
2343/*
2344 * will return: -EAGAIN if it is ok to keep searching for superblocks
2345 * -EINVAL if there is a bad superblock
2346 * 0 on success
2347 */
2348static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2349 struct buffer_head *bh,
2350 u32 blksz,
2351 struct ocfs2_blockcheck_stats *stats)
2352{
2353 int status = -EAGAIN;
2354
2355 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2356 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2357 /* We have to do a raw check of the feature here */
2358 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2359 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2360 status = ocfs2_block_check_validate(bh->b_data,
2361 bh->b_size,
2362 &di->i_check,
2363 stats);
2364 if (status)
2365 goto out;
2366 }
2367 status = -EINVAL;
2368 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2369 mlog(ML_ERROR, "found superblock with incorrect block "
2370 "size: found %u, should be %u\n",
2371 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2372 blksz);
2373 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2374 OCFS2_MAJOR_REV_LEVEL ||
2375 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2376 OCFS2_MINOR_REV_LEVEL) {
2377 mlog(ML_ERROR, "found superblock with bad version: "
2378 "found %u.%u, should be %u.%u\n",
2379 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2380 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2381 OCFS2_MAJOR_REV_LEVEL,
2382 OCFS2_MINOR_REV_LEVEL);
2383 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2384 mlog(ML_ERROR, "bad block number on superblock: "
2385 "found %llu, should be %llu\n",
2386 (unsigned long long)le64_to_cpu(di->i_blkno),
2387 (unsigned long long)bh->b_blocknr);
2388 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2389 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2390 mlog(ML_ERROR, "bad cluster size found: %u\n",
2391 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2392 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2393 mlog(ML_ERROR, "bad root_blkno: 0\n");
2394 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2395 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2396 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2397 mlog(ML_ERROR,
2398 "Superblock slots found greater than file system "
2399 "maximum: found %u, max %u\n",
2400 le16_to_cpu(di->id2.i_super.s_max_slots),
2401 OCFS2_MAX_SLOTS);
2402 } else {
2403 /* found it! */
2404 status = 0;
2405 }
2406 }
2407
2408out:
2409 if (status && status != -EAGAIN)
2410 mlog_errno(status);
2411 return status;
2412}
2413
2414static int ocfs2_check_volume(struct ocfs2_super *osb)
2415{
2416 int status;
2417 int dirty;
2418 int local;
2419 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2420 * recover
2421 * ourselves. */
2422
2423 /* Init our journal object. */
2424 status = ocfs2_journal_init(osb->journal, &dirty);
2425 if (status < 0) {
2426 mlog(ML_ERROR, "Could not initialize journal!\n");
2427 goto finally;
2428 }
2429
2430 /* Now that journal has been initialized, check to make sure
2431 entire volume is addressable. */
2432 status = ocfs2_journal_addressable(osb);
2433 if (status)
2434 goto finally;
2435
2436 /* If the journal was unmounted cleanly then we don't want to
2437 * recover anything. Otherwise, journal_load will do that
2438 * dirty work for us :) */
2439 if (!dirty) {
2440 status = ocfs2_journal_wipe(osb->journal, 0);
2441 if (status < 0) {
2442 mlog_errno(status);
2443 goto finally;
2444 }
2445 } else {
2446 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2447 "unmounted cleanly, recovering it.\n", osb->dev_str);
2448 }
2449
2450 local = ocfs2_mount_local(osb);
2451
2452 /* will play back anything left in the journal. */
2453 status = ocfs2_journal_load(osb->journal, local, dirty);
2454 if (status < 0) {
2455 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2456 goto finally;
2457 }
2458
2459 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2460 jbd2_journal_set_features(osb->journal->j_journal,
2461 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2462 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2463 else
2464 jbd2_journal_clear_features(osb->journal->j_journal,
2465 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2466 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2467
2468 if (dirty) {
2469 /* recover my local alloc if we didn't unmount cleanly. */
2470 status = ocfs2_begin_local_alloc_recovery(osb,
2471 osb->slot_num,
2472 &local_alloc);
2473 if (status < 0) {
2474 mlog_errno(status);
2475 goto finally;
2476 }
2477 /* we complete the recovery process after we've marked
2478 * ourselves as mounted. */
2479 }
2480
2481 status = ocfs2_load_local_alloc(osb);
2482 if (status < 0) {
2483 mlog_errno(status);
2484 goto finally;
2485 }
2486
2487 if (dirty) {
2488 /* Recovery will be completed after we've mounted the
2489 * rest of the volume. */
2490 osb->dirty = 1;
2491 osb->local_alloc_copy = local_alloc;
2492 local_alloc = NULL;
2493 }
2494
2495 /* go through each journal, trylock it and if you get the
2496 * lock, and it's marked as dirty, set the bit in the recover
2497 * map and launch a recovery thread for it. */
2498 status = ocfs2_mark_dead_nodes(osb);
2499 if (status < 0) {
2500 mlog_errno(status);
2501 goto finally;
2502 }
2503
2504 status = ocfs2_compute_replay_slots(osb);
2505 if (status < 0)
2506 mlog_errno(status);
2507
2508finally:
2509 kfree(local_alloc);
2510
2511 if (status)
2512 mlog_errno(status);
2513 return status;
2514}
2515
2516/*
2517 * The routine gets called from dismount or close whenever a dismount on
2518 * volume is requested and the osb open count becomes 1.
2519 * It will remove the osb from the global list and also free up all the
2520 * initialized resources and fileobject.
2521 */
2522static void ocfs2_delete_osb(struct ocfs2_super *osb)
2523{
2524 /* This function assumes that the caller has the main osb resource */
2525
2526 /* ocfs2_initializer_super have already created this workqueue */
2527 if (osb->ocfs2_wq) {
2528 flush_workqueue(osb->ocfs2_wq);
2529 destroy_workqueue(osb->ocfs2_wq);
2530 }
2531
2532 ocfs2_free_slot_info(osb);
2533
2534 kfree(osb->osb_orphan_wipes);
2535 kfree(osb->slot_recovery_generations);
2536 /* FIXME
2537 * This belongs in journal shutdown, but because we have to
2538 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2539 * we free it here.
2540 */
2541 kfree(osb->journal);
2542 kfree(osb->local_alloc_copy);
2543 kfree(osb->uuid_str);
2544 kfree(osb->vol_label);
2545 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2546 memset(osb, 0, sizeof(struct ocfs2_super));
2547}
2548
2549/* Depending on the mount option passed, perform one of the following:
2550 * Put OCFS2 into a readonly state (default)
2551 * Return EIO so that only the process errs
2552 * Fix the error as if fsck.ocfs2 -y
2553 * panic
2554 */
2555static int ocfs2_handle_error(struct super_block *sb)
2556{
2557 struct ocfs2_super *osb = OCFS2_SB(sb);
2558 int rv = 0;
2559
2560 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2561 pr_crit("On-disk corruption discovered. "
2562 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
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 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2568 pr_crit("OCFS2: Returning error to the calling process.\n");
2569 rv = -EIO;
2570 } else { /* default option */
2571 rv = -EROFS;
2572 if (sb->s_flags & MS_RDONLY &&
2573 (ocfs2_is_soft_readonly(osb) ||
2574 ocfs2_is_hard_readonly(osb)))
2575 return rv;
2576
2577 pr_crit("OCFS2: File system is now read-only.\n");
2578 sb->s_flags |= MS_RDONLY;
2579 ocfs2_set_ro_flag(osb, 0);
2580 }
2581
2582 return rv;
2583}
2584
2585int __ocfs2_error(struct super_block *sb, const char *function,
2586 const char *fmt, ...)
2587{
2588 struct va_format vaf;
2589 va_list args;
2590
2591 va_start(args, fmt);
2592 vaf.fmt = fmt;
2593 vaf.va = &args;
2594
2595 /* Not using mlog here because we want to show the actual
2596 * function the error came from. */
2597 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2598 sb->s_id, function, &vaf);
2599
2600 va_end(args);
2601
2602 return ocfs2_handle_error(sb);
2603}
2604
2605/* Handle critical errors. This is intentionally more drastic than
2606 * ocfs2_handle_error, so we only use for things like journal errors,
2607 * etc. */
2608void __ocfs2_abort(struct super_block *sb, const char *function,
2609 const char *fmt, ...)
2610{
2611 struct va_format vaf;
2612 va_list args;
2613
2614 va_start(args, fmt);
2615
2616 vaf.fmt = fmt;
2617 vaf.va = &args;
2618
2619 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2620 sb->s_id, function, &vaf);
2621
2622 va_end(args);
2623
2624 /* We don't have the cluster support yet to go straight to
2625 * hard readonly in here. Until then, we want to keep
2626 * ocfs2_abort() so that we can at least mark critical
2627 * errors.
2628 *
2629 * TODO: This should abort the journal and alert other nodes
2630 * that our slot needs recovery. */
2631
2632 /* Force a panic(). This stinks, but it's better than letting
2633 * things continue without having a proper hard readonly
2634 * here. */
2635 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2636 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2637 ocfs2_handle_error(sb);
2638}
2639
2640/*
2641 * Void signal blockers, because in-kernel sigprocmask() only fails
2642 * when SIG_* is wrong.
2643 */
2644void ocfs2_block_signals(sigset_t *oldset)
2645{
2646 int rc;
2647 sigset_t blocked;
2648
2649 sigfillset(&blocked);
2650 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2651 BUG_ON(rc);
2652}
2653
2654void ocfs2_unblock_signals(sigset_t *oldset)
2655{
2656 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2657 BUG_ON(rc);
2658}
2659
2660module_init(ocfs2_init);
2661module_exit(ocfs2_exit);