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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#include <linux/signal.h>
46
47#define CREATE_TRACE_POINTS
48#include "ocfs2_trace.h"
49
50#include <cluster/masklog.h>
51
52#include "ocfs2.h"
53
54
55#include "ocfs1_fs_compat.h"
56
57#include "alloc.h"
58#include "aops.h"
59#include "blockcheck.h"
60#include "dlmglue.h"
61#include "export.h"
62#include "extent_map.h"
63#include "heartbeat.h"
64#include "inode.h"
65#include "journal.h"
66#include "localalloc.h"
67#include "namei.h"
68#include "slot_map.h"
69#include "super.h"
70#include "sysfile.h"
71#include "uptodate.h"
72#include "xattr.h"
73#include "quota.h"
74#include "refcounttree.h"
75#include "suballoc.h"
76
77#include "buffer_head_io.h"
78#include "filecheck.h"
79
80static struct kmem_cache *ocfs2_inode_cachep;
81struct kmem_cache *ocfs2_dquot_cachep;
82struct kmem_cache *ocfs2_qf_chunk_cachep;
83
84static struct dentry *ocfs2_debugfs_root;
85
86MODULE_AUTHOR("Oracle");
87MODULE_LICENSE("GPL");
88MODULE_DESCRIPTION("OCFS2 cluster file system");
89
90struct mount_options
91{
92 unsigned long commit_interval;
93 unsigned long mount_opt;
94 unsigned int atime_quantum;
95 signed short slot;
96 int localalloc_opt;
97 unsigned int resv_level;
98 int dir_resv_level;
99 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
100};
101
102static int ocfs2_parse_options(struct super_block *sb, char *options,
103 struct mount_options *mopt,
104 int is_remount);
105static int ocfs2_check_set_options(struct super_block *sb,
106 struct mount_options *options);
107static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
108static void ocfs2_put_super(struct super_block *sb);
109static int ocfs2_mount_volume(struct super_block *sb);
110static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
111static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
112static int ocfs2_initialize_mem_caches(void);
113static void ocfs2_free_mem_caches(void);
114static void ocfs2_delete_osb(struct ocfs2_super *osb);
115
116static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
117
118static int ocfs2_sync_fs(struct super_block *sb, int wait);
119
120static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
121static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
122static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
123static int ocfs2_check_volume(struct ocfs2_super *osb);
124static int ocfs2_verify_volume(struct ocfs2_dinode *di,
125 struct buffer_head *bh,
126 u32 sectsize,
127 struct ocfs2_blockcheck_stats *stats);
128static int ocfs2_initialize_super(struct super_block *sb,
129 struct buffer_head *bh,
130 int sector_size,
131 struct ocfs2_blockcheck_stats *stats);
132static int ocfs2_get_sector(struct super_block *sb,
133 struct buffer_head **bh,
134 int block,
135 int sect_size);
136static struct inode *ocfs2_alloc_inode(struct super_block *sb);
137static void ocfs2_destroy_inode(struct inode *inode);
138static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
139static int ocfs2_enable_quotas(struct ocfs2_super *osb);
140static void ocfs2_disable_quotas(struct ocfs2_super *osb);
141
142static struct dquot **ocfs2_get_dquots(struct inode *inode)
143{
144 return OCFS2_I(inode)->i_dquot;
145}
146
147static const struct super_operations ocfs2_sops = {
148 .statfs = ocfs2_statfs,
149 .alloc_inode = ocfs2_alloc_inode,
150 .destroy_inode = ocfs2_destroy_inode,
151 .drop_inode = ocfs2_drop_inode,
152 .evict_inode = ocfs2_evict_inode,
153 .sync_fs = ocfs2_sync_fs,
154 .put_super = ocfs2_put_super,
155 .remount_fs = ocfs2_remount,
156 .show_options = ocfs2_show_options,
157 .quota_read = ocfs2_quota_read,
158 .quota_write = ocfs2_quota_write,
159 .get_dquots = ocfs2_get_dquots,
160};
161
162enum {
163 Opt_barrier,
164 Opt_err_panic,
165 Opt_err_ro,
166 Opt_intr,
167 Opt_nointr,
168 Opt_hb_none,
169 Opt_hb_local,
170 Opt_hb_global,
171 Opt_data_ordered,
172 Opt_data_writeback,
173 Opt_atime_quantum,
174 Opt_slot,
175 Opt_commit,
176 Opt_localalloc,
177 Opt_localflocks,
178 Opt_stack,
179 Opt_user_xattr,
180 Opt_nouser_xattr,
181 Opt_inode64,
182 Opt_acl,
183 Opt_noacl,
184 Opt_usrquota,
185 Opt_grpquota,
186 Opt_coherency_buffered,
187 Opt_coherency_full,
188 Opt_resv_level,
189 Opt_dir_resv_level,
190 Opt_journal_async_commit,
191 Opt_err_cont,
192 Opt_err,
193};
194
195static const match_table_t tokens = {
196 {Opt_barrier, "barrier=%u"},
197 {Opt_err_panic, "errors=panic"},
198 {Opt_err_ro, "errors=remount-ro"},
199 {Opt_intr, "intr"},
200 {Opt_nointr, "nointr"},
201 {Opt_hb_none, OCFS2_HB_NONE},
202 {Opt_hb_local, OCFS2_HB_LOCAL},
203 {Opt_hb_global, OCFS2_HB_GLOBAL},
204 {Opt_data_ordered, "data=ordered"},
205 {Opt_data_writeback, "data=writeback"},
206 {Opt_atime_quantum, "atime_quantum=%u"},
207 {Opt_slot, "preferred_slot=%u"},
208 {Opt_commit, "commit=%u"},
209 {Opt_localalloc, "localalloc=%d"},
210 {Opt_localflocks, "localflocks"},
211 {Opt_stack, "cluster_stack=%s"},
212 {Opt_user_xattr, "user_xattr"},
213 {Opt_nouser_xattr, "nouser_xattr"},
214 {Opt_inode64, "inode64"},
215 {Opt_acl, "acl"},
216 {Opt_noacl, "noacl"},
217 {Opt_usrquota, "usrquota"},
218 {Opt_grpquota, "grpquota"},
219 {Opt_coherency_buffered, "coherency=buffered"},
220 {Opt_coherency_full, "coherency=full"},
221 {Opt_resv_level, "resv_level=%u"},
222 {Opt_dir_resv_level, "dir_resv_level=%u"},
223 {Opt_journal_async_commit, "journal_async_commit"},
224 {Opt_err_cont, "errors=continue"},
225 {Opt_err, NULL}
226};
227
228#ifdef CONFIG_DEBUG_FS
229static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
230{
231 struct ocfs2_cluster_connection *cconn = osb->cconn;
232 struct ocfs2_recovery_map *rm = osb->recovery_map;
233 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
234 int i, out = 0;
235 unsigned long flags;
236
237 out += snprintf(buf + out, len - out,
238 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
239 "Device", osb->dev_str, osb->uuid_str,
240 osb->fs_generation, osb->vol_label);
241
242 out += snprintf(buf + out, len - out,
243 "%10s => State: %d Flags: 0x%lX\n", "Volume",
244 atomic_read(&osb->vol_state), osb->osb_flags);
245
246 out += snprintf(buf + out, len - out,
247 "%10s => Block: %lu Cluster: %d\n", "Sizes",
248 osb->sb->s_blocksize, osb->s_clustersize);
249
250 out += snprintf(buf + out, len - out,
251 "%10s => Compat: 0x%X Incompat: 0x%X "
252 "ROcompat: 0x%X\n",
253 "Features", osb->s_feature_compat,
254 osb->s_feature_incompat, osb->s_feature_ro_compat);
255
256 out += snprintf(buf + out, len - out,
257 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
258 osb->s_mount_opt, osb->s_atime_quantum);
259
260 if (cconn) {
261 out += snprintf(buf + out, len - out,
262 "%10s => Stack: %s Name: %*s "
263 "Version: %d.%d\n", "Cluster",
264 (*osb->osb_cluster_stack == '\0' ?
265 "o2cb" : osb->osb_cluster_stack),
266 cconn->cc_namelen, cconn->cc_name,
267 cconn->cc_version.pv_major,
268 cconn->cc_version.pv_minor);
269 }
270
271 spin_lock_irqsave(&osb->dc_task_lock, flags);
272 out += snprintf(buf + out, len - out,
273 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
274 "WorkSeq: %lu\n", "DownCnvt",
275 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
276 osb->blocked_lock_count, osb->dc_wake_sequence,
277 osb->dc_work_sequence);
278 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
279
280 spin_lock(&osb->osb_lock);
281 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
282 "Recovery",
283 (osb->recovery_thread_task ?
284 task_pid_nr(osb->recovery_thread_task) : -1));
285 if (rm->rm_used == 0)
286 out += snprintf(buf + out, len - out, " None\n");
287 else {
288 for (i = 0; i < rm->rm_used; i++)
289 out += snprintf(buf + out, len - out, " %d",
290 rm->rm_entries[i]);
291 out += snprintf(buf + out, len - out, "\n");
292 }
293 spin_unlock(&osb->osb_lock);
294
295 out += snprintf(buf + out, len - out,
296 "%10s => Pid: %d Interval: %lu\n", "Commit",
297 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
298 osb->osb_commit_interval);
299
300 out += snprintf(buf + out, len - out,
301 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
302 "Journal", osb->journal->j_state,
303 osb->journal->j_trans_id,
304 atomic_read(&osb->journal->j_num_trans));
305
306 out += snprintf(buf + out, len - out,
307 "%10s => GlobalAllocs: %d LocalAllocs: %d "
308 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
309 "Stats",
310 atomic_read(&osb->alloc_stats.bitmap_data),
311 atomic_read(&osb->alloc_stats.local_data),
312 atomic_read(&osb->alloc_stats.bg_allocs),
313 atomic_read(&osb->alloc_stats.moves),
314 atomic_read(&osb->alloc_stats.bg_extends));
315
316 out += snprintf(buf + out, len - out,
317 "%10s => State: %u Descriptor: %llu Size: %u bits "
318 "Default: %u bits\n",
319 "LocalAlloc", osb->local_alloc_state,
320 (unsigned long long)osb->la_last_gd,
321 osb->local_alloc_bits, osb->local_alloc_default_bits);
322
323 spin_lock(&osb->osb_lock);
324 out += snprintf(buf + out, len - out,
325 "%10s => InodeSlot: %d StolenInodes: %d, "
326 "MetaSlot: %d StolenMeta: %d\n", "Steal",
327 osb->s_inode_steal_slot,
328 atomic_read(&osb->s_num_inodes_stolen),
329 osb->s_meta_steal_slot,
330 atomic_read(&osb->s_num_meta_stolen));
331 spin_unlock(&osb->osb_lock);
332
333 out += snprintf(buf + out, len - out, "OrphanScan => ");
334 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
335 os->os_count, os->os_seqno);
336 out += snprintf(buf + out, len - out, " Last Scan: ");
337 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
338 out += snprintf(buf + out, len - out, "Disabled\n");
339 else
340 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
341 (unsigned long)(ktime_get_seconds() - os->os_scantime));
342
343 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
344 "Slots", "Num", "RecoGen");
345 for (i = 0; i < osb->max_slots; ++i) {
346 out += snprintf(buf + out, len - out,
347 "%10s %c %3d %10d\n",
348 " ",
349 (i == osb->slot_num ? '*' : ' '),
350 i, osb->slot_recovery_generations[i]);
351 }
352
353 return out;
354}
355
356static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
357{
358 struct ocfs2_super *osb = inode->i_private;
359 char *buf = NULL;
360
361 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
362 if (!buf)
363 goto bail;
364
365 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
366
367 file->private_data = buf;
368
369 return 0;
370bail:
371 return -ENOMEM;
372}
373
374static int ocfs2_debug_release(struct inode *inode, struct file *file)
375{
376 kfree(file->private_data);
377 return 0;
378}
379
380static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
381 size_t nbytes, loff_t *ppos)
382{
383 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
384 i_size_read(file->f_mapping->host));
385}
386#else
387static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
388{
389 return 0;
390}
391static int ocfs2_debug_release(struct inode *inode, struct file *file)
392{
393 return 0;
394}
395static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
396 size_t nbytes, loff_t *ppos)
397{
398 return 0;
399}
400#endif
401
402static const struct file_operations ocfs2_osb_debug_fops = {
403 .open = ocfs2_osb_debug_open,
404 .release = ocfs2_debug_release,
405 .read = ocfs2_debug_read,
406 .llseek = generic_file_llseek,
407};
408
409static int ocfs2_sync_fs(struct super_block *sb, int wait)
410{
411 int status;
412 tid_t target;
413 struct ocfs2_super *osb = OCFS2_SB(sb);
414
415 if (ocfs2_is_hard_readonly(osb))
416 return -EROFS;
417
418 if (wait) {
419 status = ocfs2_flush_truncate_log(osb);
420 if (status < 0)
421 mlog_errno(status);
422 } else {
423 ocfs2_schedule_truncate_log_flush(osb, 0);
424 }
425
426 if (jbd2_journal_start_commit(osb->journal->j_journal,
427 &target)) {
428 if (wait)
429 jbd2_log_wait_commit(osb->journal->j_journal,
430 target);
431 }
432 return 0;
433}
434
435static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
436{
437 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
438 && (ino == USER_QUOTA_SYSTEM_INODE
439 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
440 return 0;
441 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
442 && (ino == GROUP_QUOTA_SYSTEM_INODE
443 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
444 return 0;
445 return 1;
446}
447
448static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
449{
450 struct inode *new = NULL;
451 int status = 0;
452 int i;
453
454 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
455 if (IS_ERR(new)) {
456 status = PTR_ERR(new);
457 mlog_errno(status);
458 goto bail;
459 }
460 osb->root_inode = new;
461
462 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
463 if (IS_ERR(new)) {
464 status = PTR_ERR(new);
465 mlog_errno(status);
466 goto bail;
467 }
468 osb->sys_root_inode = new;
469
470 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
471 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
472 if (!ocfs2_need_system_inode(osb, i))
473 continue;
474 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
475 if (!new) {
476 ocfs2_release_system_inodes(osb);
477 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
478 mlog_errno(status);
479 mlog(ML_ERROR, "Unable to load system inode %d, "
480 "possibly corrupt fs?", i);
481 goto bail;
482 }
483
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 = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
509 status, i, osb->slot_num);
510 goto bail;
511 }
512
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
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
598
599
600
601
602#if BITS_PER_LONG == 32
603# if defined(CONFIG_LBDAF)
604 BUILD_BUG_ON(sizeof(sector_t) != 8);
605
606
607
608 if (bytes > PAGE_SIZE) {
609 bytes = PAGE_SIZE;
610 trim = 1;
611
612
613
614
615 bitshift = 31;
616 }
617# else
618
619
620
621
622 bytes = 1 << bbits;
623 trim = 1;
624 bitshift = 31;
625# endif
626#endif
627
628
629
630
631
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
668
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
677 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
678
679 if (*flags & SB_RDONLY) {
680 ret = ocfs2_susp_quotas(osb, 0);
681 if (ret < 0)
682 goto out;
683 }
684
685
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 & SB_RDONLY) {
694 sb->s_flags |= SB_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 &= ~SB_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
718 if (!ret && !(*flags & SB_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
725 spin_lock(&osb->osb_lock);
726 sb->s_flags |= SB_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
736
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 & ~SB_POSIXACL) |
747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
748 SB_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
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
776 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
777 *sector_size = OCFS2_MIN_BLOCKSIZE;
778
779
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
807
808
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
878
879
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
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
984
985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
986 if (!sb_has_quota_loaded(sb, type))
987 continue;
988 oinfo = sb_dqinfo(sb, type)->dqi_priv;
989 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
990 inode = igrab(sb->s_dquot.files[type]);
991
992
993
994 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
995 DQUOT_LIMITS_ENABLED);
996 if (!inode)
997 continue;
998 iput(inode);
999 }
1000}
1001
1002static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1003{
1004 struct dentry *root;
1005 int status, sector_size;
1006 struct mount_options parsed_options;
1007 struct inode *inode = NULL;
1008 struct ocfs2_super *osb = NULL;
1009 struct buffer_head *bh = NULL;
1010 char nodestr[12];
1011 struct ocfs2_blockcheck_stats stats;
1012
1013 trace_ocfs2_fill_super(sb, data, silent);
1014
1015 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1016 status = -EINVAL;
1017 goto read_super_error;
1018 }
1019
1020
1021 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
1022 if (status < 0) {
1023 mlog(ML_ERROR, "superblock probe failed!\n");
1024 goto read_super_error;
1025 }
1026
1027 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1028 osb = OCFS2_SB(sb);
1029 if (status < 0) {
1030 mlog_errno(status);
1031 goto read_super_error;
1032 }
1033 brelse(bh);
1034 bh = NULL;
1035
1036 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1037 status = -EINVAL;
1038 goto read_super_error;
1039 }
1040 osb->s_mount_opt = parsed_options.mount_opt;
1041 osb->s_atime_quantum = parsed_options.atime_quantum;
1042 osb->preferred_slot = parsed_options.slot;
1043 osb->osb_commit_interval = parsed_options.commit_interval;
1044
1045 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1046 osb->osb_resv_level = parsed_options.resv_level;
1047 osb->osb_dir_resv_level = parsed_options.resv_level;
1048 if (parsed_options.dir_resv_level == -1)
1049 osb->osb_dir_resv_level = parsed_options.resv_level;
1050 else
1051 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1052
1053 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1054 if (status)
1055 goto read_super_error;
1056
1057 sb->s_magic = OCFS2_SUPER_MAGIC;
1058
1059 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1060 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1061
1062
1063
1064 if (bdev_read_only(sb->s_bdev)) {
1065 if (!sb_rdonly(sb)) {
1066 status = -EACCES;
1067 mlog(ML_ERROR, "Readonly device detected but readonly "
1068 "mount was not specified.\n");
1069 goto read_super_error;
1070 }
1071
1072
1073
1074 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1075 status = -EROFS;
1076 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1077 "device.\n");
1078 goto read_super_error;
1079 }
1080
1081 status = ocfs2_check_journals_nolocks(osb);
1082 if (status < 0) {
1083 if (status == -EROFS)
1084 mlog(ML_ERROR, "Recovery required on readonly "
1085 "file system, but write access is "
1086 "unavailable.\n");
1087 else
1088 mlog_errno(status);
1089 goto read_super_error;
1090 }
1091
1092 ocfs2_set_ro_flag(osb, 1);
1093
1094 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1095 "Cluster services will not be used for this mount. "
1096 "Recovery will be skipped.\n", osb->dev_str);
1097 }
1098
1099 if (!ocfs2_is_hard_readonly(osb)) {
1100 if (sb_rdonly(sb))
1101 ocfs2_set_ro_flag(osb, 0);
1102 }
1103
1104 status = ocfs2_verify_heartbeat(osb);
1105 if (status < 0) {
1106 mlog_errno(status);
1107 goto read_super_error;
1108 }
1109
1110 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1111 ocfs2_debugfs_root);
1112 if (!osb->osb_debug_root) {
1113 status = -EINVAL;
1114 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1115 goto read_super_error;
1116 }
1117
1118 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1119 osb->osb_debug_root,
1120 osb,
1121 &ocfs2_osb_debug_fops);
1122 if (!osb->osb_ctxt) {
1123 status = -EINVAL;
1124 mlog_errno(status);
1125 goto read_super_error;
1126 }
1127
1128 if (ocfs2_meta_ecc(osb)) {
1129 status = ocfs2_blockcheck_stats_debugfs_install(
1130 &osb->osb_ecc_stats,
1131 osb->osb_debug_root);
1132 if (status) {
1133 mlog(ML_ERROR,
1134 "Unable to create blockcheck statistics "
1135 "files\n");
1136 goto read_super_error;
1137 }
1138 }
1139
1140 status = ocfs2_mount_volume(sb);
1141 if (status < 0)
1142 goto read_super_error;
1143
1144 if (osb->root_inode)
1145 inode = igrab(osb->root_inode);
1146
1147 if (!inode) {
1148 status = -EIO;
1149 mlog_errno(status);
1150 goto read_super_error;
1151 }
1152
1153 root = d_make_root(inode);
1154 if (!root) {
1155 status = -ENOMEM;
1156 mlog_errno(status);
1157 goto read_super_error;
1158 }
1159
1160 sb->s_root = root;
1161
1162 ocfs2_complete_mount_recovery(osb);
1163
1164 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1165 &ocfs2_kset->kobj);
1166 if (!osb->osb_dev_kset) {
1167 status = -ENOMEM;
1168 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1169 goto read_super_error;
1170 }
1171
1172
1173
1174 if (ocfs2_filecheck_create_sysfs(osb)) {
1175 status = -ENOMEM;
1176 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1177 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1178 goto read_super_error;
1179 }
1180
1181 if (ocfs2_mount_local(osb))
1182 snprintf(nodestr, sizeof(nodestr), "local");
1183 else
1184 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1185
1186 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1187 "with %s data mode.\n",
1188 osb->dev_str, nodestr, osb->slot_num,
1189 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1190 "ordered");
1191
1192 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1193 wake_up(&osb->osb_mount_event);
1194
1195
1196
1197
1198 if (!sb_rdonly(sb)) {
1199 status = ocfs2_enable_quotas(osb);
1200 if (status < 0) {
1201
1202
1203 mlog_errno(status);
1204 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1205 wake_up(&osb->osb_mount_event);
1206 return status;
1207 }
1208 }
1209
1210 ocfs2_complete_quota_recovery(osb);
1211
1212
1213 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1214 wake_up(&osb->osb_mount_event);
1215
1216
1217 ocfs2_orphan_scan_start(osb);
1218
1219 return status;
1220
1221read_super_error:
1222 brelse(bh);
1223
1224 if (status)
1225 mlog_errno(status);
1226
1227 if (osb) {
1228 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1229 wake_up(&osb->osb_mount_event);
1230 ocfs2_dismount_volume(sb, 1);
1231 }
1232
1233 return status;
1234}
1235
1236static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1237 int flags,
1238 const char *dev_name,
1239 void *data)
1240{
1241 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1242}
1243
1244static struct file_system_type ocfs2_fs_type = {
1245 .owner = THIS_MODULE,
1246 .name = "ocfs2",
1247 .mount = ocfs2_mount,
1248 .kill_sb = kill_block_super,
1249 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1250 .next = NULL
1251};
1252MODULE_ALIAS_FS("ocfs2");
1253
1254static int ocfs2_check_set_options(struct super_block *sb,
1255 struct mount_options *options)
1256{
1257 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1258 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1259 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1260 mlog(ML_ERROR, "User quotas were requested, but this "
1261 "filesystem does not have the feature enabled.\n");
1262 return 0;
1263 }
1264 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1265 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1266 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1267 mlog(ML_ERROR, "Group quotas were requested, but this "
1268 "filesystem does not have the feature enabled.\n");
1269 return 0;
1270 }
1271 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1272 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1273 mlog(ML_ERROR, "ACL support requested but extended attributes "
1274 "feature is not enabled\n");
1275 return 0;
1276 }
1277
1278 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1279 OCFS2_MOUNT_NO_POSIX_ACL))) {
1280 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1281 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1282 else
1283 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1284 }
1285 return 1;
1286}
1287
1288static int ocfs2_parse_options(struct super_block *sb,
1289 char *options,
1290 struct mount_options *mopt,
1291 int is_remount)
1292{
1293 int status, user_stack = 0;
1294 char *p;
1295 u32 tmp;
1296 int token, option;
1297 substring_t args[MAX_OPT_ARGS];
1298
1299 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1300
1301 mopt->commit_interval = 0;
1302 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1303 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1304 mopt->slot = OCFS2_INVALID_SLOT;
1305 mopt->localalloc_opt = -1;
1306 mopt->cluster_stack[0] = '\0';
1307 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1308 mopt->dir_resv_level = -1;
1309
1310 if (!options) {
1311 status = 1;
1312 goto bail;
1313 }
1314
1315 while ((p = strsep(&options, ",")) != NULL) {
1316 if (!*p)
1317 continue;
1318
1319 token = match_token(p, tokens, args);
1320 switch (token) {
1321 case Opt_hb_local:
1322 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1323 break;
1324 case Opt_hb_none:
1325 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1326 break;
1327 case Opt_hb_global:
1328 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1329 break;
1330 case Opt_barrier:
1331 if (match_int(&args[0], &option)) {
1332 status = 0;
1333 goto bail;
1334 }
1335 if (option)
1336 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1337 else
1338 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1339 break;
1340 case Opt_intr:
1341 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1342 break;
1343 case Opt_nointr:
1344 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1345 break;
1346 case Opt_err_panic:
1347 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1348 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1349 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1350 break;
1351 case Opt_err_ro:
1352 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1353 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1354 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1355 break;
1356 case Opt_err_cont:
1357 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1358 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1359 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1360 break;
1361 case Opt_data_ordered:
1362 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1363 break;
1364 case Opt_data_writeback:
1365 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1366 break;
1367 case Opt_user_xattr:
1368 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1369 break;
1370 case Opt_nouser_xattr:
1371 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1372 break;
1373 case Opt_atime_quantum:
1374 if (match_int(&args[0], &option)) {
1375 status = 0;
1376 goto bail;
1377 }
1378 if (option >= 0)
1379 mopt->atime_quantum = option;
1380 break;
1381 case Opt_slot:
1382 if (match_int(&args[0], &option)) {
1383 status = 0;
1384 goto bail;
1385 }
1386 if (option)
1387 mopt->slot = (s16)option;
1388 break;
1389 case Opt_commit:
1390 if (match_int(&args[0], &option)) {
1391 status = 0;
1392 goto bail;
1393 }
1394 if (option < 0)
1395 return 0;
1396 if (option == 0)
1397 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1398 mopt->commit_interval = HZ * option;
1399 break;
1400 case Opt_localalloc:
1401 if (match_int(&args[0], &option)) {
1402 status = 0;
1403 goto bail;
1404 }
1405 if (option >= 0)
1406 mopt->localalloc_opt = option;
1407 break;
1408 case Opt_localflocks:
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419 if (!is_remount)
1420 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1421 break;
1422 case Opt_stack:
1423
1424
1425
1426
1427 if (((args[0].to - args[0].from) !=
1428 OCFS2_STACK_LABEL_LEN) ||
1429 (strnlen(args[0].from,
1430 OCFS2_STACK_LABEL_LEN) !=
1431 OCFS2_STACK_LABEL_LEN)) {
1432 mlog(ML_ERROR,
1433 "Invalid cluster_stack option\n");
1434 status = 0;
1435 goto bail;
1436 }
1437 memcpy(mopt->cluster_stack, args[0].from,
1438 OCFS2_STACK_LABEL_LEN);
1439 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1440
1441
1442
1443
1444
1445 if (memcmp(mopt->cluster_stack,
1446 OCFS2_CLASSIC_CLUSTER_STACK,
1447 OCFS2_STACK_LABEL_LEN))
1448 user_stack = 1;
1449 break;
1450 case Opt_inode64:
1451 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1452 break;
1453 case Opt_usrquota:
1454 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1455 break;
1456 case Opt_grpquota:
1457 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1458 break;
1459 case Opt_coherency_buffered:
1460 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1461 break;
1462 case Opt_coherency_full:
1463 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1464 break;
1465 case Opt_acl:
1466 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1467 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1468 break;
1469 case Opt_noacl:
1470 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1471 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1472 break;
1473 case Opt_resv_level:
1474 if (is_remount)
1475 break;
1476 if (match_int(&args[0], &option)) {
1477 status = 0;
1478 goto bail;
1479 }
1480 if (option >= OCFS2_MIN_RESV_LEVEL &&
1481 option < OCFS2_MAX_RESV_LEVEL)
1482 mopt->resv_level = option;
1483 break;
1484 case Opt_dir_resv_level:
1485 if (is_remount)
1486 break;
1487 if (match_int(&args[0], &option)) {
1488 status = 0;
1489 goto bail;
1490 }
1491 if (option >= OCFS2_MIN_RESV_LEVEL &&
1492 option < OCFS2_MAX_RESV_LEVEL)
1493 mopt->dir_resv_level = option;
1494 break;
1495 case Opt_journal_async_commit:
1496 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1497 break;
1498 default:
1499 mlog(ML_ERROR,
1500 "Unrecognized mount option \"%s\" "
1501 "or missing value\n", p);
1502 status = 0;
1503 goto bail;
1504 }
1505 }
1506
1507 if (user_stack == 0) {
1508
1509 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1510 OCFS2_MOUNT_HB_GLOBAL |
1511 OCFS2_MOUNT_HB_NONE);
1512 if (hweight32(tmp) != 1) {
1513 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1514 status = 0;
1515 goto bail;
1516 }
1517 }
1518
1519 status = 1;
1520
1521bail:
1522 return status;
1523}
1524
1525static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1526{
1527 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1528 unsigned long opts = osb->s_mount_opt;
1529 unsigned int local_alloc_megs;
1530
1531 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1532 seq_printf(s, ",_netdev");
1533 if (opts & OCFS2_MOUNT_HB_LOCAL)
1534 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1535 else
1536 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1537 } else
1538 seq_printf(s, ",%s", OCFS2_HB_NONE);
1539
1540 if (opts & OCFS2_MOUNT_NOINTR)
1541 seq_printf(s, ",nointr");
1542
1543 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1544 seq_printf(s, ",data=writeback");
1545 else
1546 seq_printf(s, ",data=ordered");
1547
1548 if (opts & OCFS2_MOUNT_BARRIER)
1549 seq_printf(s, ",barrier=1");
1550
1551 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1552 seq_printf(s, ",errors=panic");
1553 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1554 seq_printf(s, ",errors=continue");
1555 else
1556 seq_printf(s, ",errors=remount-ro");
1557
1558 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1559 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1560
1561 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1562
1563 if (osb->osb_commit_interval)
1564 seq_printf(s, ",commit=%u",
1565 (unsigned) (osb->osb_commit_interval / HZ));
1566
1567 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1568 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1569 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1570
1571 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1572 seq_printf(s, ",localflocks,");
1573
1574 if (osb->osb_cluster_stack[0])
1575 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1576 OCFS2_STACK_LABEL_LEN);
1577 if (opts & OCFS2_MOUNT_USRQUOTA)
1578 seq_printf(s, ",usrquota");
1579 if (opts & OCFS2_MOUNT_GRPQUOTA)
1580 seq_printf(s, ",grpquota");
1581
1582 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1583 seq_printf(s, ",coherency=buffered");
1584 else
1585 seq_printf(s, ",coherency=full");
1586
1587 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1588 seq_printf(s, ",nouser_xattr");
1589 else
1590 seq_printf(s, ",user_xattr");
1591
1592 if (opts & OCFS2_MOUNT_INODE64)
1593 seq_printf(s, ",inode64");
1594
1595 if (opts & OCFS2_MOUNT_POSIX_ACL)
1596 seq_printf(s, ",acl");
1597 else
1598 seq_printf(s, ",noacl");
1599
1600 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1601 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1602
1603 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1604 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1605
1606 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1607 seq_printf(s, ",journal_async_commit");
1608
1609 return 0;
1610}
1611
1612static int __init ocfs2_init(void)
1613{
1614 int status;
1615
1616 status = init_ocfs2_uptodate_cache();
1617 if (status < 0)
1618 goto out1;
1619
1620 status = ocfs2_initialize_mem_caches();
1621 if (status < 0)
1622 goto out2;
1623
1624 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1625 if (!ocfs2_debugfs_root) {
1626 status = -ENOMEM;
1627 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1628 goto out3;
1629 }
1630
1631 ocfs2_set_locking_protocol();
1632
1633 status = register_quota_format(&ocfs2_quota_format);
1634 if (status < 0)
1635 goto out3;
1636 status = register_filesystem(&ocfs2_fs_type);
1637 if (!status)
1638 return 0;
1639
1640 unregister_quota_format(&ocfs2_quota_format);
1641out3:
1642 debugfs_remove(ocfs2_debugfs_root);
1643 ocfs2_free_mem_caches();
1644out2:
1645 exit_ocfs2_uptodate_cache();
1646out1:
1647 mlog_errno(status);
1648 return status;
1649}
1650
1651static void __exit ocfs2_exit(void)
1652{
1653 unregister_quota_format(&ocfs2_quota_format);
1654
1655 debugfs_remove(ocfs2_debugfs_root);
1656
1657 ocfs2_free_mem_caches();
1658
1659 unregister_filesystem(&ocfs2_fs_type);
1660
1661 exit_ocfs2_uptodate_cache();
1662}
1663
1664static void ocfs2_put_super(struct super_block *sb)
1665{
1666 trace_ocfs2_put_super(sb);
1667
1668 ocfs2_sync_blockdev(sb);
1669 ocfs2_dismount_volume(sb, 0);
1670}
1671
1672static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1673{
1674 struct ocfs2_super *osb;
1675 u32 numbits, freebits;
1676 int status;
1677 struct ocfs2_dinode *bm_lock;
1678 struct buffer_head *bh = NULL;
1679 struct inode *inode = NULL;
1680
1681 trace_ocfs2_statfs(dentry->d_sb, buf);
1682
1683 osb = OCFS2_SB(dentry->d_sb);
1684
1685 inode = ocfs2_get_system_file_inode(osb,
1686 GLOBAL_BITMAP_SYSTEM_INODE,
1687 OCFS2_INVALID_SLOT);
1688 if (!inode) {
1689 mlog(ML_ERROR, "failed to get bitmap inode\n");
1690 status = -EIO;
1691 goto bail;
1692 }
1693
1694 status = ocfs2_inode_lock(inode, &bh, 0);
1695 if (status < 0) {
1696 mlog_errno(status);
1697 goto bail;
1698 }
1699
1700 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1701
1702 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1703 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1704
1705 buf->f_type = OCFS2_SUPER_MAGIC;
1706 buf->f_bsize = dentry->d_sb->s_blocksize;
1707 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1708 buf->f_blocks = ((sector_t) numbits) *
1709 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1710 buf->f_bfree = ((sector_t) freebits) *
1711 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1712 buf->f_bavail = buf->f_bfree;
1713 buf->f_files = numbits;
1714 buf->f_ffree = freebits;
1715 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1716 & 0xFFFFFFFFUL;
1717 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1718 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1719
1720 brelse(bh);
1721
1722 ocfs2_inode_unlock(inode, 0);
1723 status = 0;
1724bail:
1725 iput(inode);
1726
1727 if (status)
1728 mlog_errno(status);
1729
1730 return status;
1731}
1732
1733static void ocfs2_inode_init_once(void *data)
1734{
1735 struct ocfs2_inode_info *oi = data;
1736
1737 oi->ip_flags = 0;
1738 oi->ip_open_count = 0;
1739 spin_lock_init(&oi->ip_lock);
1740 ocfs2_extent_map_init(&oi->vfs_inode);
1741 INIT_LIST_HEAD(&oi->ip_io_markers);
1742 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1743 oi->ip_dir_start_lookup = 0;
1744 init_rwsem(&oi->ip_alloc_sem);
1745 init_rwsem(&oi->ip_xattr_sem);
1746 mutex_init(&oi->ip_io_mutex);
1747
1748 oi->ip_blkno = 0ULL;
1749 oi->ip_clusters = 0;
1750
1751 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1752
1753 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1754 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1755 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1756
1757 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1758 &ocfs2_inode_caching_ops);
1759
1760 inode_init_once(&oi->vfs_inode);
1761}
1762
1763static int ocfs2_initialize_mem_caches(void)
1764{
1765 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1766 sizeof(struct ocfs2_inode_info),
1767 0,
1768 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1769 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1770 ocfs2_inode_init_once);
1771 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1772 sizeof(struct ocfs2_dquot),
1773 0,
1774 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1775 SLAB_MEM_SPREAD),
1776 NULL);
1777 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1778 sizeof(struct ocfs2_quota_chunk),
1779 0,
1780 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1781 NULL);
1782 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1783 !ocfs2_qf_chunk_cachep) {
1784 kmem_cache_destroy(ocfs2_inode_cachep);
1785 kmem_cache_destroy(ocfs2_dquot_cachep);
1786 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1787 return -ENOMEM;
1788 }
1789
1790 return 0;
1791}
1792
1793static void ocfs2_free_mem_caches(void)
1794{
1795
1796
1797
1798
1799 rcu_barrier();
1800 kmem_cache_destroy(ocfs2_inode_cachep);
1801 ocfs2_inode_cachep = NULL;
1802
1803 kmem_cache_destroy(ocfs2_dquot_cachep);
1804 ocfs2_dquot_cachep = NULL;
1805
1806 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1807 ocfs2_qf_chunk_cachep = NULL;
1808}
1809
1810static int ocfs2_get_sector(struct super_block *sb,
1811 struct buffer_head **bh,
1812 int block,
1813 int sect_size)
1814{
1815 if (!sb_set_blocksize(sb, sect_size)) {
1816 mlog(ML_ERROR, "unable to set blocksize\n");
1817 return -EIO;
1818 }
1819
1820 *bh = sb_getblk(sb, block);
1821 if (!*bh) {
1822 mlog_errno(-ENOMEM);
1823 return -ENOMEM;
1824 }
1825 lock_buffer(*bh);
1826 if (!buffer_dirty(*bh))
1827 clear_buffer_uptodate(*bh);
1828 unlock_buffer(*bh);
1829 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1830 wait_on_buffer(*bh);
1831 if (!buffer_uptodate(*bh)) {
1832 mlog_errno(-EIO);
1833 brelse(*bh);
1834 *bh = NULL;
1835 return -EIO;
1836 }
1837
1838 return 0;
1839}
1840
1841static int ocfs2_mount_volume(struct super_block *sb)
1842{
1843 int status = 0;
1844 int unlock_super = 0;
1845 struct ocfs2_super *osb = OCFS2_SB(sb);
1846
1847 if (ocfs2_is_hard_readonly(osb))
1848 goto leave;
1849
1850 mutex_init(&osb->obs_trim_fs_mutex);
1851
1852 status = ocfs2_dlm_init(osb);
1853 if (status < 0) {
1854 mlog_errno(status);
1855 if (status == -EBADR && ocfs2_userspace_stack(osb))
1856 mlog(ML_ERROR, "couldn't mount because cluster name on"
1857 " disk does not match the running cluster name.\n");
1858 goto leave;
1859 }
1860
1861 status = ocfs2_super_lock(osb, 1);
1862 if (status < 0) {
1863 mlog_errno(status);
1864 goto leave;
1865 }
1866 unlock_super = 1;
1867
1868
1869 status = ocfs2_find_slot(osb);
1870 if (status < 0) {
1871 mlog_errno(status);
1872 goto leave;
1873 }
1874
1875
1876 status = ocfs2_init_local_system_inodes(osb);
1877 if (status < 0) {
1878 mlog_errno(status);
1879 goto leave;
1880 }
1881
1882 status = ocfs2_check_volume(osb);
1883 if (status < 0) {
1884 mlog_errno(status);
1885 goto leave;
1886 }
1887
1888 status = ocfs2_truncate_log_init(osb);
1889 if (status < 0)
1890 mlog_errno(status);
1891
1892leave:
1893 if (unlock_super)
1894 ocfs2_super_unlock(osb, 1);
1895
1896 return status;
1897}
1898
1899static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1900{
1901 int tmp, hangup_needed = 0;
1902 struct ocfs2_super *osb = NULL;
1903 char nodestr[12];
1904
1905 trace_ocfs2_dismount_volume(sb);
1906
1907 BUG_ON(!sb);
1908 osb = OCFS2_SB(sb);
1909 BUG_ON(!osb);
1910
1911
1912
1913 ocfs2_filecheck_remove_sysfs(osb);
1914
1915 kset_unregister(osb->osb_dev_kset);
1916
1917 debugfs_remove(osb->osb_ctxt);
1918
1919
1920 ocfs2_orphan_scan_stop(osb);
1921
1922 ocfs2_disable_quotas(osb);
1923
1924
1925 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1926
1927 cancel_work_sync(&osb->dquot_drop_work);
1928
1929 ocfs2_shutdown_local_alloc(osb);
1930
1931 ocfs2_truncate_log_shutdown(osb);
1932
1933
1934 ocfs2_recovery_exit(osb);
1935
1936 ocfs2_journal_shutdown(osb);
1937
1938 ocfs2_sync_blockdev(sb);
1939
1940 ocfs2_purge_refcount_trees(osb);
1941
1942
1943
1944 if (osb->cconn) {
1945 tmp = ocfs2_super_lock(osb, 1);
1946 if (tmp < 0) {
1947 mlog_errno(tmp);
1948 return;
1949 }
1950 }
1951
1952 if (osb->slot_num != OCFS2_INVALID_SLOT)
1953 ocfs2_put_slot(osb);
1954
1955 if (osb->cconn)
1956 ocfs2_super_unlock(osb, 1);
1957
1958 ocfs2_release_system_inodes(osb);
1959
1960
1961
1962
1963
1964
1965
1966 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1967 !ocfs2_is_hard_readonly(osb))
1968 hangup_needed = 1;
1969
1970 if (osb->cconn)
1971 ocfs2_dlm_shutdown(osb, hangup_needed);
1972
1973 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1974 debugfs_remove(osb->osb_debug_root);
1975
1976 if (hangup_needed)
1977 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1978
1979 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1980
1981 if (ocfs2_mount_local(osb))
1982 snprintf(nodestr, sizeof(nodestr), "local");
1983 else
1984 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1985
1986 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1987 osb->dev_str, nodestr);
1988
1989 ocfs2_delete_osb(osb);
1990 kfree(osb);
1991 sb->s_dev = 0;
1992 sb->s_fs_info = NULL;
1993}
1994
1995static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1996 unsigned uuid_bytes)
1997{
1998 int i, ret;
1999 char *ptr;
2000
2001 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2002
2003 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2004 if (osb->uuid_str == NULL)
2005 return -ENOMEM;
2006
2007 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2008
2009 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2010 if (ret != 2)
2011 return -EINVAL;
2012
2013 ptr += 2;
2014 }
2015
2016 return 0;
2017}
2018
2019
2020
2021
2022static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2023{
2024 int status = 0;
2025 u64 max_block =
2026 ocfs2_clusters_to_blocks(osb->sb,
2027 osb->osb_clusters_at_boot) - 1;
2028
2029
2030 if (max_block <= (u32)~0ULL)
2031 goto out;
2032
2033
2034
2035 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2036 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2037 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2038 JBD2_FEATURE_INCOMPAT_64BIT))) {
2039 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2040 "Enable the 'block64' journal option with tunefs.ocfs2");
2041 status = -EFBIG;
2042 goto out;
2043 }
2044
2045 out:
2046 return status;
2047}
2048
2049static int ocfs2_initialize_super(struct super_block *sb,
2050 struct buffer_head *bh,
2051 int sector_size,
2052 struct ocfs2_blockcheck_stats *stats)
2053{
2054 int status;
2055 int i, cbits, bbits;
2056 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2057 struct inode *inode = NULL;
2058 struct ocfs2_journal *journal;
2059 struct ocfs2_super *osb;
2060 u64 total_blocks;
2061
2062 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2063 if (!osb) {
2064 status = -ENOMEM;
2065 mlog_errno(status);
2066 goto bail;
2067 }
2068
2069 sb->s_fs_info = osb;
2070 sb->s_op = &ocfs2_sops;
2071 sb->s_d_op = &ocfs2_dentry_ops;
2072 sb->s_export_op = &ocfs2_export_ops;
2073 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2074 sb->dq_op = &ocfs2_quota_operations;
2075 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2076 sb->s_xattr = ocfs2_xattr_handlers;
2077 sb->s_time_gran = 1;
2078 sb->s_flags |= SB_NOATIME;
2079
2080 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2081 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2082 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2083 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2084 sizeof(di->id2.i_super.s_uuid));
2085
2086 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2087
2088 for (i = 0; i < 3; i++)
2089 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2090 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2091
2092 osb->sb = sb;
2093 osb->s_sectsize_bits = blksize_bits(sector_size);
2094 BUG_ON(!osb->s_sectsize_bits);
2095
2096 spin_lock_init(&osb->dc_task_lock);
2097 init_waitqueue_head(&osb->dc_event);
2098 osb->dc_work_sequence = 0;
2099 osb->dc_wake_sequence = 0;
2100 INIT_LIST_HEAD(&osb->blocked_lock_list);
2101 osb->blocked_lock_count = 0;
2102 spin_lock_init(&osb->osb_lock);
2103 spin_lock_init(&osb->osb_xattr_lock);
2104 ocfs2_init_steal_slots(osb);
2105
2106 mutex_init(&osb->system_file_mutex);
2107
2108 atomic_set(&osb->alloc_stats.moves, 0);
2109 atomic_set(&osb->alloc_stats.local_data, 0);
2110 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2111 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2112 atomic_set(&osb->alloc_stats.bg_extends, 0);
2113
2114
2115 osb->osb_ecc_stats = *stats;
2116
2117 ocfs2_init_node_maps(osb);
2118
2119 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2120 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2121
2122 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2123 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2124 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2125 osb->max_slots);
2126 status = -EINVAL;
2127 goto bail;
2128 }
2129
2130 ocfs2_orphan_scan_init(osb);
2131
2132 status = ocfs2_recovery_init(osb);
2133 if (status) {
2134 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2135 mlog_errno(status);
2136 goto bail;
2137 }
2138
2139 init_waitqueue_head(&osb->checkpoint_event);
2140
2141 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2142
2143 osb->slot_num = OCFS2_INVALID_SLOT;
2144
2145 osb->s_xattr_inline_size = le16_to_cpu(
2146 di->id2.i_super.s_xattr_inline_size);
2147
2148 osb->local_alloc_state = OCFS2_LA_UNUSED;
2149 osb->local_alloc_bh = NULL;
2150 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2151
2152 init_waitqueue_head(&osb->osb_mount_event);
2153
2154 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2155 if (status) {
2156 mlog_errno(status);
2157 goto bail;
2158 }
2159
2160 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2161 if (!osb->vol_label) {
2162 mlog(ML_ERROR, "unable to alloc vol label\n");
2163 status = -ENOMEM;
2164 goto bail;
2165 }
2166
2167 osb->slot_recovery_generations =
2168 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2169 GFP_KERNEL);
2170 if (!osb->slot_recovery_generations) {
2171 status = -ENOMEM;
2172 mlog_errno(status);
2173 goto bail;
2174 }
2175
2176 init_waitqueue_head(&osb->osb_wipe_event);
2177 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2178 sizeof(*osb->osb_orphan_wipes),
2179 GFP_KERNEL);
2180 if (!osb->osb_orphan_wipes) {
2181 status = -ENOMEM;
2182 mlog_errno(status);
2183 goto bail;
2184 }
2185
2186 osb->osb_rf_lock_tree = RB_ROOT;
2187
2188 osb->s_feature_compat =
2189 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2190 osb->s_feature_ro_compat =
2191 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2192 osb->s_feature_incompat =
2193 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2194
2195 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2196 mlog(ML_ERROR, "couldn't mount because of unsupported "
2197 "optional features (%x).\n", i);
2198 status = -EINVAL;
2199 goto bail;
2200 }
2201 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2202 mlog(ML_ERROR, "couldn't mount RDWR because of "
2203 "unsupported optional features (%x).\n", i);
2204 status = -EINVAL;
2205 goto bail;
2206 }
2207
2208 if (ocfs2_clusterinfo_valid(osb)) {
2209 osb->osb_stackflags =
2210 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2211 strlcpy(osb->osb_cluster_stack,
2212 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2213 OCFS2_STACK_LABEL_LEN + 1);
2214 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2215 mlog(ML_ERROR,
2216 "couldn't mount because of an invalid "
2217 "cluster stack label (%s) \n",
2218 osb->osb_cluster_stack);
2219 status = -EINVAL;
2220 goto bail;
2221 }
2222 strlcpy(osb->osb_cluster_name,
2223 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2224 OCFS2_CLUSTER_NAME_LEN + 1);
2225 } else {
2226
2227
2228 osb->osb_cluster_stack[0] = '\0';
2229 }
2230
2231 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2243 if (!journal) {
2244 mlog(ML_ERROR, "unable to alloc journal\n");
2245 status = -ENOMEM;
2246 goto bail;
2247 }
2248 osb->journal = journal;
2249 journal->j_osb = osb;
2250
2251 atomic_set(&journal->j_num_trans, 0);
2252 init_rwsem(&journal->j_trans_barrier);
2253 init_waitqueue_head(&journal->j_checkpointed);
2254 spin_lock_init(&journal->j_lock);
2255 journal->j_trans_id = (unsigned long) 1;
2256 INIT_LIST_HEAD(&journal->j_la_cleanups);
2257 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2258 journal->j_state = OCFS2_JOURNAL_FREE;
2259
2260 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2261 init_llist_head(&osb->dquot_drop_list);
2262
2263
2264 osb->s_clustersize_bits =
2265 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2266 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2267
2268 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2269 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2270 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2271 osb->s_clustersize);
2272 status = -EINVAL;
2273 goto bail;
2274 }
2275
2276 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2277 le32_to_cpu(di->i_clusters));
2278
2279 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2280 total_blocks);
2281 if (status) {
2282 mlog(ML_ERROR, "Volume too large "
2283 "to mount safely on this system");
2284 status = -EFBIG;
2285 goto bail;
2286 }
2287
2288 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2289 sizeof(di->id2.i_super.s_uuid))) {
2290 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2291 status = -ENOMEM;
2292 goto bail;
2293 }
2294
2295 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2296 OCFS2_MAX_VOL_LABEL_LEN);
2297 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2298 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2299 osb->first_cluster_group_blkno =
2300 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2301 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2302 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2303 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2304 (unsigned long long)osb->root_blkno,
2305 (unsigned long long)osb->system_dir_blkno,
2306 osb->s_clustersize_bits);
2307
2308 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2309 if (!osb->osb_dlm_debug) {
2310 status = -ENOMEM;
2311 mlog_errno(status);
2312 goto bail;
2313 }
2314
2315 atomic_set(&osb->vol_state, VOLUME_INIT);
2316
2317
2318 status = ocfs2_init_global_system_inodes(osb);
2319 if (status < 0) {
2320 mlog_errno(status);
2321 goto bail;
2322 }
2323
2324
2325
2326
2327 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2328 OCFS2_INVALID_SLOT);
2329 if (!inode) {
2330 status = -EINVAL;
2331 mlog_errno(status);
2332 goto bail;
2333 }
2334
2335 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2336 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2337 iput(inode);
2338
2339 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2340 osb->s_feature_incompat) * 8;
2341
2342 status = ocfs2_init_slot_info(osb);
2343 if (status < 0) {
2344 mlog_errno(status);
2345 goto bail;
2346 }
2347 cleancache_init_shared_fs(sb);
2348
2349 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2350 if (!osb->ocfs2_wq) {
2351 status = -ENOMEM;
2352 mlog_errno(status);
2353 }
2354
2355bail:
2356 return status;
2357}
2358
2359
2360
2361
2362
2363
2364static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2365 struct buffer_head *bh,
2366 u32 blksz,
2367 struct ocfs2_blockcheck_stats *stats)
2368{
2369 int status = -EAGAIN;
2370
2371 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2372 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2373
2374 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2375 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2376 status = ocfs2_block_check_validate(bh->b_data,
2377 bh->b_size,
2378 &di->i_check,
2379 stats);
2380 if (status)
2381 goto out;
2382 }
2383 status = -EINVAL;
2384 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2385 mlog(ML_ERROR, "found superblock with incorrect block "
2386 "size: found %u, should be %u\n",
2387 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2388 blksz);
2389 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2390 OCFS2_MAJOR_REV_LEVEL ||
2391 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2392 OCFS2_MINOR_REV_LEVEL) {
2393 mlog(ML_ERROR, "found superblock with bad version: "
2394 "found %u.%u, should be %u.%u\n",
2395 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2396 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2397 OCFS2_MAJOR_REV_LEVEL,
2398 OCFS2_MINOR_REV_LEVEL);
2399 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2400 mlog(ML_ERROR, "bad block number on superblock: "
2401 "found %llu, should be %llu\n",
2402 (unsigned long long)le64_to_cpu(di->i_blkno),
2403 (unsigned long long)bh->b_blocknr);
2404 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2405 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2406 mlog(ML_ERROR, "bad cluster size found: %u\n",
2407 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2408 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2409 mlog(ML_ERROR, "bad root_blkno: 0\n");
2410 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2411 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2412 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2413 mlog(ML_ERROR,
2414 "Superblock slots found greater than file system "
2415 "maximum: found %u, max %u\n",
2416 le16_to_cpu(di->id2.i_super.s_max_slots),
2417 OCFS2_MAX_SLOTS);
2418 } else {
2419
2420 status = 0;
2421 }
2422 }
2423
2424out:
2425 if (status && status != -EAGAIN)
2426 mlog_errno(status);
2427 return status;
2428}
2429
2430static int ocfs2_check_volume(struct ocfs2_super *osb)
2431{
2432 int status;
2433 int dirty;
2434 int local;
2435 struct ocfs2_dinode *local_alloc = NULL;
2436
2437
2438
2439
2440 status = ocfs2_journal_init(osb->journal, &dirty);
2441 if (status < 0) {
2442 mlog(ML_ERROR, "Could not initialize journal!\n");
2443 goto finally;
2444 }
2445
2446
2447
2448 status = ocfs2_journal_addressable(osb);
2449 if (status)
2450 goto finally;
2451
2452
2453
2454
2455 if (!dirty) {
2456 status = ocfs2_journal_wipe(osb->journal, 0);
2457 if (status < 0) {
2458 mlog_errno(status);
2459 goto finally;
2460 }
2461 } else {
2462 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2463 "unmounted cleanly, recovering it.\n", osb->dev_str);
2464 }
2465
2466 local = ocfs2_mount_local(osb);
2467
2468
2469 status = ocfs2_journal_load(osb->journal, local, dirty);
2470 if (status < 0) {
2471 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2472 goto finally;
2473 }
2474
2475 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2476 jbd2_journal_set_features(osb->journal->j_journal,
2477 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2478 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2479 else
2480 jbd2_journal_clear_features(osb->journal->j_journal,
2481 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2482 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2483
2484 if (dirty) {
2485
2486 status = ocfs2_begin_local_alloc_recovery(osb,
2487 osb->slot_num,
2488 &local_alloc);
2489 if (status < 0) {
2490 mlog_errno(status);
2491 goto finally;
2492 }
2493
2494
2495 }
2496
2497 status = ocfs2_load_local_alloc(osb);
2498 if (status < 0) {
2499 mlog_errno(status);
2500 goto finally;
2501 }
2502
2503 if (dirty) {
2504
2505
2506 osb->local_alloc_copy = local_alloc;
2507 local_alloc = NULL;
2508 }
2509
2510
2511
2512
2513 status = ocfs2_mark_dead_nodes(osb);
2514 if (status < 0) {
2515 mlog_errno(status);
2516 goto finally;
2517 }
2518
2519 status = ocfs2_compute_replay_slots(osb);
2520 if (status < 0)
2521 mlog_errno(status);
2522
2523finally:
2524 kfree(local_alloc);
2525
2526 if (status)
2527 mlog_errno(status);
2528 return status;
2529}
2530
2531
2532
2533
2534
2535
2536
2537static void ocfs2_delete_osb(struct ocfs2_super *osb)
2538{
2539
2540
2541
2542 if (osb->ocfs2_wq)
2543 destroy_workqueue(osb->ocfs2_wq);
2544
2545 ocfs2_free_slot_info(osb);
2546
2547 kfree(osb->osb_orphan_wipes);
2548 kfree(osb->slot_recovery_generations);
2549
2550
2551
2552
2553
2554 kfree(osb->journal);
2555 kfree(osb->local_alloc_copy);
2556 kfree(osb->uuid_str);
2557 kfree(osb->vol_label);
2558 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2559 memset(osb, 0, sizeof(struct ocfs2_super));
2560}
2561
2562
2563
2564
2565
2566
2567
2568static int ocfs2_handle_error(struct super_block *sb)
2569{
2570 struct ocfs2_super *osb = OCFS2_SB(sb);
2571 int rv = 0;
2572
2573 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2574 pr_crit("On-disk corruption discovered. "
2575 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2576
2577 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2578 panic("OCFS2: (device %s): panic forced after error\n",
2579 sb->s_id);
2580 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2581 pr_crit("OCFS2: Returning error to the calling process.\n");
2582 rv = -EIO;
2583 } else {
2584 rv = -EROFS;
2585 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2586 return rv;
2587
2588 pr_crit("OCFS2: File system is now read-only.\n");
2589 sb->s_flags |= SB_RDONLY;
2590 ocfs2_set_ro_flag(osb, 0);
2591 }
2592
2593 return rv;
2594}
2595
2596int __ocfs2_error(struct super_block *sb, const char *function,
2597 const char *fmt, ...)
2598{
2599 struct va_format vaf;
2600 va_list args;
2601
2602 va_start(args, fmt);
2603 vaf.fmt = fmt;
2604 vaf.va = &args;
2605
2606
2607
2608 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2609 sb->s_id, function, &vaf);
2610
2611 va_end(args);
2612
2613 return ocfs2_handle_error(sb);
2614}
2615
2616
2617
2618
2619void __ocfs2_abort(struct super_block *sb, const char *function,
2620 const char *fmt, ...)
2621{
2622 struct va_format vaf;
2623 va_list args;
2624
2625 va_start(args, fmt);
2626
2627 vaf.fmt = fmt;
2628 vaf.va = &args;
2629
2630 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2631 sb->s_id, function, &vaf);
2632
2633 va_end(args);
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2647 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2648 ocfs2_handle_error(sb);
2649}
2650
2651
2652
2653
2654
2655void ocfs2_block_signals(sigset_t *oldset)
2656{
2657 int rc;
2658 sigset_t blocked;
2659
2660 sigfillset(&blocked);
2661 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2662 BUG_ON(rc);
2663}
2664
2665void ocfs2_unblock_signals(sigset_t *oldset)
2666{
2667 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2668 BUG_ON(rc);
2669}
2670
2671module_init(ocfs2_init);
2672module_exit(ocfs2_exit);
2673
