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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
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 unsigned 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_nocluster,
179 Opt_err,
180};
181
182static const match_table_t tokens = {
183 {Opt_barrier, "barrier=%u"},
184 {Opt_err_panic, "errors=panic"},
185 {Opt_err_ro, "errors=remount-ro"},
186 {Opt_intr, "intr"},
187 {Opt_nointr, "nointr"},
188 {Opt_hb_none, OCFS2_HB_NONE},
189 {Opt_hb_local, OCFS2_HB_LOCAL},
190 {Opt_hb_global, OCFS2_HB_GLOBAL},
191 {Opt_data_ordered, "data=ordered"},
192 {Opt_data_writeback, "data=writeback"},
193 {Opt_atime_quantum, "atime_quantum=%u"},
194 {Opt_slot, "preferred_slot=%u"},
195 {Opt_commit, "commit=%u"},
196 {Opt_localalloc, "localalloc=%d"},
197 {Opt_localflocks, "localflocks"},
198 {Opt_stack, "cluster_stack=%s"},
199 {Opt_user_xattr, "user_xattr"},
200 {Opt_nouser_xattr, "nouser_xattr"},
201 {Opt_inode64, "inode64"},
202 {Opt_acl, "acl"},
203 {Opt_noacl, "noacl"},
204 {Opt_usrquota, "usrquota"},
205 {Opt_grpquota, "grpquota"},
206 {Opt_coherency_buffered, "coherency=buffered"},
207 {Opt_coherency_full, "coherency=full"},
208 {Opt_resv_level, "resv_level=%u"},
209 {Opt_dir_resv_level, "dir_resv_level=%u"},
210 {Opt_journal_async_commit, "journal_async_commit"},
211 {Opt_err_cont, "errors=continue"},
212 {Opt_nocluster, "nocluster"},
213 {Opt_err, NULL}
214};
215
216#ifdef CONFIG_DEBUG_FS
217static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
218{
219 struct ocfs2_cluster_connection *cconn = osb->cconn;
220 struct ocfs2_recovery_map *rm = osb->recovery_map;
221 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
222 int i, out = 0;
223 unsigned long flags;
224
225 out += scnprintf(buf + out, len - out,
226 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
227 "Device", osb->dev_str, osb->uuid_str,
228 osb->fs_generation, osb->vol_label);
229
230 out += scnprintf(buf + out, len - out,
231 "%10s => State: %d Flags: 0x%lX\n", "Volume",
232 atomic_read(&osb->vol_state), osb->osb_flags);
233
234 out += scnprintf(buf + out, len - out,
235 "%10s => Block: %lu Cluster: %d\n", "Sizes",
236 osb->sb->s_blocksize, osb->s_clustersize);
237
238 out += scnprintf(buf + out, len - out,
239 "%10s => Compat: 0x%X Incompat: 0x%X "
240 "ROcompat: 0x%X\n",
241 "Features", osb->s_feature_compat,
242 osb->s_feature_incompat, osb->s_feature_ro_compat);
243
244 out += scnprintf(buf + out, len - out,
245 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
246 osb->s_mount_opt, osb->s_atime_quantum);
247
248 if (cconn) {
249 out += scnprintf(buf + out, len - out,
250 "%10s => Stack: %s Name: %*s "
251 "Version: %d.%d\n", "Cluster",
252 (*osb->osb_cluster_stack == '\0' ?
253 "o2cb" : osb->osb_cluster_stack),
254 cconn->cc_namelen, cconn->cc_name,
255 cconn->cc_version.pv_major,
256 cconn->cc_version.pv_minor);
257 }
258
259 spin_lock_irqsave(&osb->dc_task_lock, flags);
260 out += scnprintf(buf + out, len - out,
261 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
262 "WorkSeq: %lu\n", "DownCnvt",
263 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
264 osb->blocked_lock_count, osb->dc_wake_sequence,
265 osb->dc_work_sequence);
266 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
267
268 spin_lock(&osb->osb_lock);
269 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
270 "Recovery",
271 (osb->recovery_thread_task ?
272 task_pid_nr(osb->recovery_thread_task) : -1));
273 if (rm->rm_used == 0)
274 out += scnprintf(buf + out, len - out, " None\n");
275 else {
276 for (i = 0; i < rm->rm_used; i++)
277 out += scnprintf(buf + out, len - out, " %d",
278 rm->rm_entries[i]);
279 out += scnprintf(buf + out, len - out, "\n");
280 }
281 spin_unlock(&osb->osb_lock);
282
283 out += scnprintf(buf + out, len - out,
284 "%10s => Pid: %d Interval: %lu\n", "Commit",
285 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
286 osb->osb_commit_interval);
287
288 out += scnprintf(buf + out, len - out,
289 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
290 "Journal", osb->journal->j_state,
291 osb->journal->j_trans_id,
292 atomic_read(&osb->journal->j_num_trans));
293
294 out += scnprintf(buf + out, len - out,
295 "%10s => GlobalAllocs: %d LocalAllocs: %d "
296 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
297 "Stats",
298 atomic_read(&osb->alloc_stats.bitmap_data),
299 atomic_read(&osb->alloc_stats.local_data),
300 atomic_read(&osb->alloc_stats.bg_allocs),
301 atomic_read(&osb->alloc_stats.moves),
302 atomic_read(&osb->alloc_stats.bg_extends));
303
304 out += scnprintf(buf + out, len - out,
305 "%10s => State: %u Descriptor: %llu Size: %u bits "
306 "Default: %u bits\n",
307 "LocalAlloc", osb->local_alloc_state,
308 (unsigned long long)osb->la_last_gd,
309 osb->local_alloc_bits, osb->local_alloc_default_bits);
310
311 spin_lock(&osb->osb_lock);
312 out += scnprintf(buf + out, len - out,
313 "%10s => InodeSlot: %d StolenInodes: %d, "
314 "MetaSlot: %d StolenMeta: %d\n", "Steal",
315 osb->s_inode_steal_slot,
316 atomic_read(&osb->s_num_inodes_stolen),
317 osb->s_meta_steal_slot,
318 atomic_read(&osb->s_num_meta_stolen));
319 spin_unlock(&osb->osb_lock);
320
321 out += scnprintf(buf + out, len - out, "OrphanScan => ");
322 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ",
323 os->os_count, os->os_seqno);
324 out += scnprintf(buf + out, len - out, " Last Scan: ");
325 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
326 out += scnprintf(buf + out, len - out, "Disabled\n");
327 else
328 out += scnprintf(buf + out, len - out, "%lu seconds ago\n",
329 (unsigned long)(ktime_get_seconds() - os->os_scantime));
330
331 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n",
332 "Slots", "Num", "RecoGen");
333 for (i = 0; i < osb->max_slots; ++i) {
334 out += scnprintf(buf + out, len - out,
335 "%10s %c %3d %10d\n",
336 " ",
337 (i == osb->slot_num ? '*' : ' '),
338 i, osb->slot_recovery_generations[i]);
339 }
340
341 return out;
342}
343
344static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
345{
346 struct ocfs2_super *osb = inode->i_private;
347 char *buf = NULL;
348
349 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
350 if (!buf)
351 goto bail;
352
353 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
354
355 file->private_data = buf;
356
357 return 0;
358bail:
359 return -ENOMEM;
360}
361
362static int ocfs2_debug_release(struct inode *inode, struct file *file)
363{
364 kfree(file->private_data);
365 return 0;
366}
367
368static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
369 size_t nbytes, loff_t *ppos)
370{
371 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
372 i_size_read(file->f_mapping->host));
373}
374#else
375static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
376{
377 return 0;
378}
379static int ocfs2_debug_release(struct inode *inode, struct file *file)
380{
381 return 0;
382}
383static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
384 size_t nbytes, loff_t *ppos)
385{
386 return 0;
387}
388#endif
389
390static const struct file_operations ocfs2_osb_debug_fops = {
391 .open = ocfs2_osb_debug_open,
392 .release = ocfs2_debug_release,
393 .read = ocfs2_debug_read,
394 .llseek = generic_file_llseek,
395};
396
397static int ocfs2_sync_fs(struct super_block *sb, int wait)
398{
399 int status;
400 tid_t target;
401 struct ocfs2_super *osb = OCFS2_SB(sb);
402
403 if (ocfs2_is_hard_readonly(osb))
404 return -EROFS;
405
406 if (wait) {
407 status = ocfs2_flush_truncate_log(osb);
408 if (status < 0)
409 mlog_errno(status);
410 } else {
411 ocfs2_schedule_truncate_log_flush(osb, 0);
412 }
413
414 if (jbd2_journal_start_commit(osb->journal->j_journal,
415 &target)) {
416 if (wait)
417 jbd2_log_wait_commit(osb->journal->j_journal,
418 target);
419 }
420 return 0;
421}
422
423static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
424{
425 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
426 && (ino == USER_QUOTA_SYSTEM_INODE
427 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
428 return 0;
429 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
430 && (ino == GROUP_QUOTA_SYSTEM_INODE
431 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
432 return 0;
433 return 1;
434}
435
436static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
437{
438 struct inode *new = NULL;
439 int status = 0;
440 int i;
441
442 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
443 if (IS_ERR(new)) {
444 status = PTR_ERR(new);
445 mlog_errno(status);
446 goto bail;
447 }
448 osb->root_inode = new;
449
450 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
451 if (IS_ERR(new)) {
452 status = PTR_ERR(new);
453 mlog_errno(status);
454 goto bail;
455 }
456 osb->sys_root_inode = new;
457
458 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
459 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
460 if (!ocfs2_need_system_inode(osb, i))
461 continue;
462 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
463 if (!new) {
464 ocfs2_release_system_inodes(osb);
465 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
466 mlog_errno(status);
467 mlog(ML_ERROR, "Unable to load system inode %d, "
468 "possibly corrupt fs?", i);
469 goto bail;
470 }
471
472 iput(new);
473 }
474
475bail:
476 if (status)
477 mlog_errno(status);
478 return status;
479}
480
481static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
482{
483 struct inode *new = NULL;
484 int status = 0;
485 int i;
486
487 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
488 i < NUM_SYSTEM_INODES;
489 i++) {
490 if (!ocfs2_need_system_inode(osb, i))
491 continue;
492 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
493 if (!new) {
494 ocfs2_release_system_inodes(osb);
495 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
496 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
497 status, i, osb->slot_num);
498 goto bail;
499 }
500
501 iput(new);
502 }
503
504bail:
505 if (status)
506 mlog_errno(status);
507 return status;
508}
509
510static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
511{
512 int i;
513 struct inode *inode;
514
515 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
516 inode = osb->global_system_inodes[i];
517 if (inode) {
518 iput(inode);
519 osb->global_system_inodes[i] = NULL;
520 }
521 }
522
523 inode = osb->sys_root_inode;
524 if (inode) {
525 iput(inode);
526 osb->sys_root_inode = NULL;
527 }
528
529 inode = osb->root_inode;
530 if (inode) {
531 iput(inode);
532 osb->root_inode = NULL;
533 }
534
535 if (!osb->local_system_inodes)
536 return;
537
538 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
539 if (osb->local_system_inodes[i]) {
540 iput(osb->local_system_inodes[i]);
541 osb->local_system_inodes[i] = NULL;
542 }
543 }
544
545 kfree(osb->local_system_inodes);
546 osb->local_system_inodes = NULL;
547}
548
549
550static struct inode *ocfs2_alloc_inode(struct super_block *sb)
551{
552 struct ocfs2_inode_info *oi;
553
554 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
555 if (!oi)
556 return NULL;
557
558 oi->i_sync_tid = 0;
559 oi->i_datasync_tid = 0;
560 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
561
562 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
563 return &oi->vfs_inode;
564}
565
566static void ocfs2_free_inode(struct inode *inode)
567{
568 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
569}
570
571static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
572 unsigned int cbits)
573{
574 unsigned int bytes = 1 << cbits;
575 unsigned int trim = bytes;
576 unsigned int bitshift = 32;
577
578
579
580
581
582
583
584#if BITS_PER_LONG == 32
585 BUILD_BUG_ON(sizeof(sector_t) != 8);
586
587
588
589 if (bytes > PAGE_SIZE) {
590 bytes = PAGE_SIZE;
591 trim = 1;
592
593
594
595
596 bitshift = 31;
597 }
598#endif
599
600
601
602
603
604
605 return (((unsigned long long)bytes) << bitshift) - trim;
606}
607
608static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
609{
610 int incompat_features;
611 int ret = 0;
612 struct mount_options parsed_options;
613 struct ocfs2_super *osb = OCFS2_SB(sb);
614 u32 tmp;
615
616 sync_filesystem(sb);
617
618 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
619 !ocfs2_check_set_options(sb, &parsed_options)) {
620 ret = -EINVAL;
621 goto out;
622 }
623
624 tmp = OCFS2_MOUNT_NOCLUSTER;
625 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
626 ret = -EINVAL;
627 mlog(ML_ERROR, "Cannot change nocluster option on remount\n");
628 goto out;
629 }
630
631 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
632 OCFS2_MOUNT_HB_NONE;
633 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
634 ret = -EINVAL;
635 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
636 goto out;
637 }
638
639 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
640 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
641 ret = -EINVAL;
642 mlog(ML_ERROR, "Cannot change data mode on remount\n");
643 goto out;
644 }
645
646
647
648 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
649 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
650 ret = -EINVAL;
651 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
652 goto out;
653 }
654
655
656 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
657
658 if (*flags & SB_RDONLY) {
659 ret = ocfs2_susp_quotas(osb, 0);
660 if (ret < 0)
661 goto out;
662 }
663
664
665 spin_lock(&osb->osb_lock);
666 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
667 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
668 ret = -EROFS;
669 goto unlock_osb;
670 }
671
672 if (*flags & SB_RDONLY) {
673 sb->s_flags |= SB_RDONLY;
674 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
675 } else {
676 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
677 mlog(ML_ERROR, "Cannot remount RDWR "
678 "filesystem due to previous errors.\n");
679 ret = -EROFS;
680 goto unlock_osb;
681 }
682 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
683 if (incompat_features) {
684 mlog(ML_ERROR, "Cannot remount RDWR because "
685 "of unsupported optional features "
686 "(%x).\n", incompat_features);
687 ret = -EINVAL;
688 goto unlock_osb;
689 }
690 sb->s_flags &= ~SB_RDONLY;
691 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
692 }
693 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
694unlock_osb:
695 spin_unlock(&osb->osb_lock);
696
697 if (!ret && !(*flags & SB_RDONLY)) {
698 if (sb_any_quota_suspended(sb))
699 ret = ocfs2_susp_quotas(osb, 1);
700 else
701 ret = ocfs2_enable_quotas(osb);
702 if (ret < 0) {
703
704 spin_lock(&osb->osb_lock);
705 sb->s_flags |= SB_RDONLY;
706 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
707 spin_unlock(&osb->osb_lock);
708 goto out;
709 }
710 }
711 }
712
713 if (!ret) {
714
715
716 osb->s_mount_opt = parsed_options.mount_opt;
717 osb->s_atime_quantum = parsed_options.atime_quantum;
718 osb->preferred_slot = parsed_options.slot;
719 if (parsed_options.commit_interval)
720 osb->osb_commit_interval = parsed_options.commit_interval;
721
722 if (!ocfs2_is_hard_readonly(osb))
723 ocfs2_set_journal_params(osb);
724
725 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
726 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
727 SB_POSIXACL : 0);
728 }
729out:
730 return ret;
731}
732
733static int ocfs2_sb_probe(struct super_block *sb,
734 struct buffer_head **bh,
735 int *sector_size,
736 struct ocfs2_blockcheck_stats *stats)
737{
738 int status, tmpstat;
739 struct ocfs1_vol_disk_hdr *hdr;
740 struct ocfs2_dinode *di;
741 int blksize;
742
743 *bh = NULL;
744
745
746 *sector_size = bdev_logical_block_size(sb->s_bdev);
747 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
748 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
749 *sector_size, OCFS2_MAX_BLOCKSIZE);
750 status = -EINVAL;
751 goto bail;
752 }
753
754
755 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
756 *sector_size = OCFS2_MIN_BLOCKSIZE;
757
758
759 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
760 if (status < 0) {
761 mlog_errno(status);
762 goto bail;
763 }
764 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
765 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
766 mlog(ML_ERROR, "incompatible version: %u.%u\n",
767 hdr->major_version, hdr->minor_version);
768 status = -EINVAL;
769 }
770 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
771 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
772 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
773 hdr->signature);
774 status = -EINVAL;
775 }
776 brelse(*bh);
777 *bh = NULL;
778 if (status < 0) {
779 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
780 "upgraded before mounting with ocfs v2\n");
781 goto bail;
782 }
783
784
785
786
787
788
789 status = -EINVAL;
790 for (blksize = *sector_size;
791 blksize <= OCFS2_MAX_BLOCKSIZE;
792 blksize <<= 1) {
793 tmpstat = ocfs2_get_sector(sb, bh,
794 OCFS2_SUPER_BLOCK_BLKNO,
795 blksize);
796 if (tmpstat < 0) {
797 status = tmpstat;
798 mlog_errno(status);
799 break;
800 }
801 di = (struct ocfs2_dinode *) (*bh)->b_data;
802 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
803 spin_lock_init(&stats->b_lock);
804 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
805 if (tmpstat < 0) {
806 brelse(*bh);
807 *bh = NULL;
808 }
809 if (tmpstat != -EAGAIN) {
810 status = tmpstat;
811 break;
812 }
813 }
814
815bail:
816 return status;
817}
818
819static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
820{
821 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
822
823 if (osb->s_mount_opt & hb_enabled) {
824 if (ocfs2_mount_local(osb)) {
825 mlog(ML_ERROR, "Cannot heartbeat on a locally "
826 "mounted device.\n");
827 return -EINVAL;
828 }
829 if (ocfs2_userspace_stack(osb)) {
830 mlog(ML_ERROR, "Userspace stack expected, but "
831 "o2cb heartbeat arguments passed to mount\n");
832 return -EINVAL;
833 }
834 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
835 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
836 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
837 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
838 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
839 return -EINVAL;
840 }
841 }
842
843 if (!(osb->s_mount_opt & hb_enabled)) {
844 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
845 !ocfs2_userspace_stack(osb)) {
846 mlog(ML_ERROR, "Heartbeat has to be started to mount "
847 "a read-write clustered device.\n");
848 return -EINVAL;
849 }
850 }
851
852 return 0;
853}
854
855
856
857
858
859
860static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
861 struct mount_options *mopt)
862{
863 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
864 mlog(ML_ERROR,
865 "cluster stack passed to mount, but this filesystem "
866 "does not support it\n");
867 return -EINVAL;
868 }
869
870 if (ocfs2_userspace_stack(osb) &&
871 !(osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
872 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
873 OCFS2_STACK_LABEL_LEN)) {
874 mlog(ML_ERROR,
875 "cluster stack passed to mount (\"%s\") does not "
876 "match the filesystem (\"%s\")\n",
877 mopt->cluster_stack,
878 osb->osb_cluster_stack);
879 return -EINVAL;
880 }
881
882 return 0;
883}
884
885static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
886{
887 int type;
888 struct super_block *sb = osb->sb;
889 unsigned int feature[OCFS2_MAXQUOTAS] = {
890 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
891 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
892 int status = 0;
893
894 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
895 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
896 continue;
897 if (unsuspend)
898 status = dquot_resume(sb, type);
899 else {
900 struct ocfs2_mem_dqinfo *oinfo;
901
902
903 oinfo = sb_dqinfo(sb, type)->dqi_priv;
904 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
905 status = dquot_suspend(sb, type);
906 }
907 if (status < 0)
908 break;
909 }
910 if (status < 0)
911 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
912 "remount (error = %d).\n", status);
913 return status;
914}
915
916static int ocfs2_enable_quotas(struct ocfs2_super *osb)
917{
918 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
919 struct super_block *sb = osb->sb;
920 unsigned int feature[OCFS2_MAXQUOTAS] = {
921 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
922 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
923 unsigned int ino[OCFS2_MAXQUOTAS] = {
924 LOCAL_USER_QUOTA_SYSTEM_INODE,
925 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
926 int status;
927 int type;
928
929 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
930 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
931 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
932 continue;
933 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
934 osb->slot_num);
935 if (!inode[type]) {
936 status = -ENOENT;
937 goto out_quota_off;
938 }
939 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2,
940 DQUOT_USAGE_ENABLED);
941 if (status < 0)
942 goto out_quota_off;
943 }
944
945 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
946 iput(inode[type]);
947 return 0;
948out_quota_off:
949 ocfs2_disable_quotas(osb);
950 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
951 iput(inode[type]);
952 mlog_errno(status);
953 return status;
954}
955
956static void ocfs2_disable_quotas(struct ocfs2_super *osb)
957{
958 int type;
959 struct inode *inode;
960 struct super_block *sb = osb->sb;
961 struct ocfs2_mem_dqinfo *oinfo;
962
963
964
965 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
966 if (!sb_has_quota_loaded(sb, type))
967 continue;
968 oinfo = sb_dqinfo(sb, type)->dqi_priv;
969 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
970 inode = igrab(sb->s_dquot.files[type]);
971
972
973
974 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
975 DQUOT_LIMITS_ENABLED);
976 iput(inode);
977 }
978}
979
980static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
981{
982 struct dentry *root;
983 int status, sector_size;
984 struct mount_options parsed_options;
985 struct inode *inode = NULL;
986 struct ocfs2_super *osb = NULL;
987 struct buffer_head *bh = NULL;
988 char nodestr[12];
989 struct ocfs2_blockcheck_stats stats;
990
991 trace_ocfs2_fill_super(sb, data, silent);
992
993 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
994 status = -EINVAL;
995 goto read_super_error;
996 }
997
998
999 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
1000 if (status < 0) {
1001 mlog(ML_ERROR, "superblock probe failed!\n");
1002 goto read_super_error;
1003 }
1004
1005 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1006 osb = OCFS2_SB(sb);
1007 if (status < 0) {
1008 mlog_errno(status);
1009 goto read_super_error;
1010 }
1011 brelse(bh);
1012 bh = NULL;
1013
1014 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1015 status = -EINVAL;
1016 goto read_super_error;
1017 }
1018 osb->s_mount_opt = parsed_options.mount_opt;
1019 osb->s_atime_quantum = parsed_options.atime_quantum;
1020 osb->preferred_slot = parsed_options.slot;
1021 osb->osb_commit_interval = parsed_options.commit_interval;
1022
1023 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1024 osb->osb_resv_level = parsed_options.resv_level;
1025 osb->osb_dir_resv_level = parsed_options.resv_level;
1026 if (parsed_options.dir_resv_level == -1)
1027 osb->osb_dir_resv_level = parsed_options.resv_level;
1028 else
1029 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1030
1031 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1032 if (status)
1033 goto read_super_error;
1034
1035 sb->s_magic = OCFS2_SUPER_MAGIC;
1036
1037 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1038 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1039
1040
1041
1042 if (bdev_read_only(sb->s_bdev)) {
1043 if (!sb_rdonly(sb)) {
1044 status = -EACCES;
1045 mlog(ML_ERROR, "Readonly device detected but readonly "
1046 "mount was not specified.\n");
1047 goto read_super_error;
1048 }
1049
1050
1051
1052 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1053 status = -EROFS;
1054 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1055 "device.\n");
1056 goto read_super_error;
1057 }
1058
1059 status = ocfs2_check_journals_nolocks(osb);
1060 if (status < 0) {
1061 if (status == -EROFS)
1062 mlog(ML_ERROR, "Recovery required on readonly "
1063 "file system, but write access is "
1064 "unavailable.\n");
1065 else
1066 mlog_errno(status);
1067 goto read_super_error;
1068 }
1069
1070 ocfs2_set_ro_flag(osb, 1);
1071
1072 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1073 "Cluster services will not be used for this mount. "
1074 "Recovery will be skipped.\n", osb->dev_str);
1075 }
1076
1077 if (!ocfs2_is_hard_readonly(osb)) {
1078 if (sb_rdonly(sb))
1079 ocfs2_set_ro_flag(osb, 0);
1080 }
1081
1082 status = ocfs2_verify_heartbeat(osb);
1083 if (status < 0) {
1084 mlog_errno(status);
1085 goto read_super_error;
1086 }
1087
1088 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1089 ocfs2_debugfs_root);
1090
1091 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1092 osb, &ocfs2_osb_debug_fops);
1093
1094 if (ocfs2_meta_ecc(osb))
1095 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1096 osb->osb_debug_root);
1097
1098 status = ocfs2_mount_volume(sb);
1099 if (status < 0)
1100 goto read_super_error;
1101
1102 if (osb->root_inode)
1103 inode = igrab(osb->root_inode);
1104
1105 if (!inode) {
1106 status = -EIO;
1107 mlog_errno(status);
1108 goto read_super_error;
1109 }
1110
1111 root = d_make_root(inode);
1112 if (!root) {
1113 status = -ENOMEM;
1114 mlog_errno(status);
1115 goto read_super_error;
1116 }
1117
1118 sb->s_root = root;
1119
1120 ocfs2_complete_mount_recovery(osb);
1121
1122 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1123 &ocfs2_kset->kobj);
1124 if (!osb->osb_dev_kset) {
1125 status = -ENOMEM;
1126 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1127 goto read_super_error;
1128 }
1129
1130
1131
1132 if (ocfs2_filecheck_create_sysfs(osb)) {
1133 status = -ENOMEM;
1134 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1135 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1136 goto read_super_error;
1137 }
1138
1139 if (ocfs2_mount_local(osb))
1140 snprintf(nodestr, sizeof(nodestr), "local");
1141 else
1142 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1143
1144 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1145 "with %s data mode.\n",
1146 osb->dev_str, nodestr, osb->slot_num,
1147 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1148 "ordered");
1149
1150 if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
1151 !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT))
1152 printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted "
1153 "without cluster aware mode.\n", osb->dev_str);
1154
1155 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1156 wake_up(&osb->osb_mount_event);
1157
1158
1159
1160
1161 if (!sb_rdonly(sb)) {
1162 status = ocfs2_enable_quotas(osb);
1163 if (status < 0) {
1164
1165
1166 mlog_errno(status);
1167 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1168 wake_up(&osb->osb_mount_event);
1169 return status;
1170 }
1171 }
1172
1173 ocfs2_complete_quota_recovery(osb);
1174
1175
1176 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1177 wake_up(&osb->osb_mount_event);
1178
1179
1180 ocfs2_orphan_scan_start(osb);
1181
1182 return status;
1183
1184read_super_error:
1185 brelse(bh);
1186
1187 if (status)
1188 mlog_errno(status);
1189
1190 if (osb) {
1191 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1192 wake_up(&osb->osb_mount_event);
1193 ocfs2_dismount_volume(sb, 1);
1194 }
1195
1196 return status;
1197}
1198
1199static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1200 int flags,
1201 const char *dev_name,
1202 void *data)
1203{
1204 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1205}
1206
1207static struct file_system_type ocfs2_fs_type = {
1208 .owner = THIS_MODULE,
1209 .name = "ocfs2",
1210 .mount = ocfs2_mount,
1211 .kill_sb = kill_block_super,
1212 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1213 .next = NULL
1214};
1215MODULE_ALIAS_FS("ocfs2");
1216
1217static int ocfs2_check_set_options(struct super_block *sb,
1218 struct mount_options *options)
1219{
1220 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1221 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1222 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1223 mlog(ML_ERROR, "User quotas were requested, but this "
1224 "filesystem does not have the feature enabled.\n");
1225 return 0;
1226 }
1227 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1228 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1229 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1230 mlog(ML_ERROR, "Group quotas were requested, but this "
1231 "filesystem does not have the feature enabled.\n");
1232 return 0;
1233 }
1234 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1235 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1236 mlog(ML_ERROR, "ACL support requested but extended attributes "
1237 "feature is not enabled\n");
1238 return 0;
1239 }
1240
1241 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1242 OCFS2_MOUNT_NO_POSIX_ACL))) {
1243 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1244 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1245 else
1246 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1247 }
1248 return 1;
1249}
1250
1251static int ocfs2_parse_options(struct super_block *sb,
1252 char *options,
1253 struct mount_options *mopt,
1254 int is_remount)
1255{
1256 int status, user_stack = 0;
1257 char *p;
1258 u32 tmp;
1259 int token, option;
1260 substring_t args[MAX_OPT_ARGS];
1261
1262 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1263
1264 mopt->commit_interval = 0;
1265 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1266 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1267 mopt->slot = OCFS2_INVALID_SLOT;
1268 mopt->localalloc_opt = -1;
1269 mopt->cluster_stack[0] = '\0';
1270 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1271 mopt->dir_resv_level = -1;
1272
1273 if (!options) {
1274 status = 1;
1275 goto bail;
1276 }
1277
1278 while ((p = strsep(&options, ",")) != NULL) {
1279 if (!*p)
1280 continue;
1281
1282 token = match_token(p, tokens, args);
1283 switch (token) {
1284 case Opt_hb_local:
1285 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1286 break;
1287 case Opt_hb_none:
1288 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1289 break;
1290 case Opt_hb_global:
1291 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1292 break;
1293 case Opt_barrier:
1294 if (match_int(&args[0], &option)) {
1295 status = 0;
1296 goto bail;
1297 }
1298 if (option)
1299 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1300 else
1301 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1302 break;
1303 case Opt_intr:
1304 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1305 break;
1306 case Opt_nointr:
1307 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1308 break;
1309 case Opt_err_panic:
1310 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1311 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1312 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1313 break;
1314 case Opt_err_ro:
1315 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1316 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1317 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1318 break;
1319 case Opt_err_cont:
1320 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1321 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1322 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1323 break;
1324 case Opt_data_ordered:
1325 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1326 break;
1327 case Opt_data_writeback:
1328 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1329 break;
1330 case Opt_user_xattr:
1331 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1332 break;
1333 case Opt_nouser_xattr:
1334 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1335 break;
1336 case Opt_atime_quantum:
1337 if (match_int(&args[0], &option)) {
1338 status = 0;
1339 goto bail;
1340 }
1341 if (option >= 0)
1342 mopt->atime_quantum = option;
1343 break;
1344 case Opt_slot:
1345 if (match_int(&args[0], &option)) {
1346 status = 0;
1347 goto bail;
1348 }
1349 if (option)
1350 mopt->slot = (u16)option;
1351 break;
1352 case Opt_commit:
1353 if (match_int(&args[0], &option)) {
1354 status = 0;
1355 goto bail;
1356 }
1357 if (option < 0)
1358 return 0;
1359 if (option == 0)
1360 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1361 mopt->commit_interval = HZ * option;
1362 break;
1363 case Opt_localalloc:
1364 if (match_int(&args[0], &option)) {
1365 status = 0;
1366 goto bail;
1367 }
1368 if (option >= 0)
1369 mopt->localalloc_opt = option;
1370 break;
1371 case Opt_localflocks:
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382 if (!is_remount)
1383 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1384 break;
1385 case Opt_stack:
1386
1387
1388
1389
1390 if (((args[0].to - args[0].from) !=
1391 OCFS2_STACK_LABEL_LEN) ||
1392 (strnlen(args[0].from,
1393 OCFS2_STACK_LABEL_LEN) !=
1394 OCFS2_STACK_LABEL_LEN)) {
1395 mlog(ML_ERROR,
1396 "Invalid cluster_stack option\n");
1397 status = 0;
1398 goto bail;
1399 }
1400 memcpy(mopt->cluster_stack, args[0].from,
1401 OCFS2_STACK_LABEL_LEN);
1402 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1403
1404
1405
1406
1407
1408 if (memcmp(mopt->cluster_stack,
1409 OCFS2_CLASSIC_CLUSTER_STACK,
1410 OCFS2_STACK_LABEL_LEN))
1411 user_stack = 1;
1412 break;
1413 case Opt_inode64:
1414 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1415 break;
1416 case Opt_usrquota:
1417 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1418 break;
1419 case Opt_grpquota:
1420 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1421 break;
1422 case Opt_coherency_buffered:
1423 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1424 break;
1425 case Opt_coherency_full:
1426 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1427 break;
1428 case Opt_acl:
1429 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1430 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1431 break;
1432 case Opt_noacl:
1433 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1434 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1435 break;
1436 case Opt_resv_level:
1437 if (is_remount)
1438 break;
1439 if (match_int(&args[0], &option)) {
1440 status = 0;
1441 goto bail;
1442 }
1443 if (option >= OCFS2_MIN_RESV_LEVEL &&
1444 option < OCFS2_MAX_RESV_LEVEL)
1445 mopt->resv_level = option;
1446 break;
1447 case Opt_dir_resv_level:
1448 if (is_remount)
1449 break;
1450 if (match_int(&args[0], &option)) {
1451 status = 0;
1452 goto bail;
1453 }
1454 if (option >= OCFS2_MIN_RESV_LEVEL &&
1455 option < OCFS2_MAX_RESV_LEVEL)
1456 mopt->dir_resv_level = option;
1457 break;
1458 case Opt_journal_async_commit:
1459 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1460 break;
1461 case Opt_nocluster:
1462 mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER;
1463 break;
1464 default:
1465 mlog(ML_ERROR,
1466 "Unrecognized mount option \"%s\" "
1467 "or missing value\n", p);
1468 status = 0;
1469 goto bail;
1470 }
1471 }
1472
1473 if (user_stack == 0) {
1474
1475 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1476 OCFS2_MOUNT_HB_GLOBAL |
1477 OCFS2_MOUNT_HB_NONE);
1478 if (hweight32(tmp) != 1) {
1479 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1480 status = 0;
1481 goto bail;
1482 }
1483 }
1484
1485 status = 1;
1486
1487bail:
1488 return status;
1489}
1490
1491static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1492{
1493 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1494 unsigned long opts = osb->s_mount_opt;
1495 unsigned int local_alloc_megs;
1496
1497 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1498 seq_printf(s, ",_netdev");
1499 if (opts & OCFS2_MOUNT_HB_LOCAL)
1500 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1501 else
1502 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1503 } else
1504 seq_printf(s, ",%s", OCFS2_HB_NONE);
1505
1506 if (opts & OCFS2_MOUNT_NOINTR)
1507 seq_printf(s, ",nointr");
1508
1509 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1510 seq_printf(s, ",data=writeback");
1511 else
1512 seq_printf(s, ",data=ordered");
1513
1514 if (opts & OCFS2_MOUNT_BARRIER)
1515 seq_printf(s, ",barrier=1");
1516
1517 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1518 seq_printf(s, ",errors=panic");
1519 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1520 seq_printf(s, ",errors=continue");
1521 else
1522 seq_printf(s, ",errors=remount-ro");
1523
1524 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1525 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1526
1527 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1528
1529 if (osb->osb_commit_interval)
1530 seq_printf(s, ",commit=%u",
1531 (unsigned) (osb->osb_commit_interval / HZ));
1532
1533 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1534 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1535 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1536
1537 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1538 seq_printf(s, ",localflocks,");
1539
1540 if (osb->osb_cluster_stack[0])
1541 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1542 OCFS2_STACK_LABEL_LEN);
1543 if (opts & OCFS2_MOUNT_USRQUOTA)
1544 seq_printf(s, ",usrquota");
1545 if (opts & OCFS2_MOUNT_GRPQUOTA)
1546 seq_printf(s, ",grpquota");
1547
1548 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1549 seq_printf(s, ",coherency=buffered");
1550 else
1551 seq_printf(s, ",coherency=full");
1552
1553 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1554 seq_printf(s, ",nouser_xattr");
1555 else
1556 seq_printf(s, ",user_xattr");
1557
1558 if (opts & OCFS2_MOUNT_INODE64)
1559 seq_printf(s, ",inode64");
1560
1561 if (opts & OCFS2_MOUNT_POSIX_ACL)
1562 seq_printf(s, ",acl");
1563 else
1564 seq_printf(s, ",noacl");
1565
1566 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1567 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1568
1569 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1570 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1571
1572 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1573 seq_printf(s, ",journal_async_commit");
1574
1575 if (opts & OCFS2_MOUNT_NOCLUSTER)
1576 seq_printf(s, ",nocluster");
1577
1578 return 0;
1579}
1580
1581static int __init ocfs2_init(void)
1582{
1583 int status;
1584
1585 status = init_ocfs2_uptodate_cache();
1586 if (status < 0)
1587 goto out1;
1588
1589 status = ocfs2_initialize_mem_caches();
1590 if (status < 0)
1591 goto out2;
1592
1593 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1594
1595 ocfs2_set_locking_protocol();
1596
1597 status = register_quota_format(&ocfs2_quota_format);
1598 if (status < 0)
1599 goto out3;
1600 status = register_filesystem(&ocfs2_fs_type);
1601 if (!status)
1602 return 0;
1603
1604 unregister_quota_format(&ocfs2_quota_format);
1605out3:
1606 debugfs_remove(ocfs2_debugfs_root);
1607 ocfs2_free_mem_caches();
1608out2:
1609 exit_ocfs2_uptodate_cache();
1610out1:
1611 mlog_errno(status);
1612 return status;
1613}
1614
1615static void __exit ocfs2_exit(void)
1616{
1617 unregister_quota_format(&ocfs2_quota_format);
1618
1619 debugfs_remove(ocfs2_debugfs_root);
1620
1621 ocfs2_free_mem_caches();
1622
1623 unregister_filesystem(&ocfs2_fs_type);
1624
1625 exit_ocfs2_uptodate_cache();
1626}
1627
1628static void ocfs2_put_super(struct super_block *sb)
1629{
1630 trace_ocfs2_put_super(sb);
1631
1632 ocfs2_sync_blockdev(sb);
1633 ocfs2_dismount_volume(sb, 0);
1634}
1635
1636static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1637{
1638 struct ocfs2_super *osb;
1639 u32 numbits, freebits;
1640 int status;
1641 struct ocfs2_dinode *bm_lock;
1642 struct buffer_head *bh = NULL;
1643 struct inode *inode = NULL;
1644
1645 trace_ocfs2_statfs(dentry->d_sb, buf);
1646
1647 osb = OCFS2_SB(dentry->d_sb);
1648
1649 inode = ocfs2_get_system_file_inode(osb,
1650 GLOBAL_BITMAP_SYSTEM_INODE,
1651 OCFS2_INVALID_SLOT);
1652 if (!inode) {
1653 mlog(ML_ERROR, "failed to get bitmap inode\n");
1654 status = -EIO;
1655 goto bail;
1656 }
1657
1658 status = ocfs2_inode_lock(inode, &bh, 0);
1659 if (status < 0) {
1660 mlog_errno(status);
1661 goto bail;
1662 }
1663
1664 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1665
1666 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1667 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1668
1669 buf->f_type = OCFS2_SUPER_MAGIC;
1670 buf->f_bsize = dentry->d_sb->s_blocksize;
1671 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1672 buf->f_blocks = ((sector_t) numbits) *
1673 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1674 buf->f_bfree = ((sector_t) freebits) *
1675 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1676 buf->f_bavail = buf->f_bfree;
1677 buf->f_files = numbits;
1678 buf->f_ffree = freebits;
1679 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1680 & 0xFFFFFFFFUL;
1681 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1682 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1683
1684 brelse(bh);
1685
1686 ocfs2_inode_unlock(inode, 0);
1687 status = 0;
1688bail:
1689 iput(inode);
1690
1691 if (status)
1692 mlog_errno(status);
1693
1694 return status;
1695}
1696
1697static void ocfs2_inode_init_once(void *data)
1698{
1699 struct ocfs2_inode_info *oi = data;
1700
1701 oi->ip_flags = 0;
1702 oi->ip_open_count = 0;
1703 spin_lock_init(&oi->ip_lock);
1704 ocfs2_extent_map_init(&oi->vfs_inode);
1705 INIT_LIST_HEAD(&oi->ip_io_markers);
1706 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1707 oi->ip_dir_start_lookup = 0;
1708 init_rwsem(&oi->ip_alloc_sem);
1709 init_rwsem(&oi->ip_xattr_sem);
1710 mutex_init(&oi->ip_io_mutex);
1711
1712 oi->ip_blkno = 0ULL;
1713 oi->ip_clusters = 0;
1714 oi->ip_next_orphan = NULL;
1715
1716 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1717
1718 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1719 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1720 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1721
1722 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1723 &ocfs2_inode_caching_ops);
1724
1725 inode_init_once(&oi->vfs_inode);
1726}
1727
1728static int ocfs2_initialize_mem_caches(void)
1729{
1730 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1731 sizeof(struct ocfs2_inode_info),
1732 0,
1733 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1734 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1735 ocfs2_inode_init_once);
1736 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1737 sizeof(struct ocfs2_dquot),
1738 0,
1739 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1740 SLAB_MEM_SPREAD),
1741 NULL);
1742 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1743 sizeof(struct ocfs2_quota_chunk),
1744 0,
1745 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1746 NULL);
1747 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1748 !ocfs2_qf_chunk_cachep) {
1749 kmem_cache_destroy(ocfs2_inode_cachep);
1750 kmem_cache_destroy(ocfs2_dquot_cachep);
1751 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1752 return -ENOMEM;
1753 }
1754
1755 return 0;
1756}
1757
1758static void ocfs2_free_mem_caches(void)
1759{
1760
1761
1762
1763
1764 rcu_barrier();
1765 kmem_cache_destroy(ocfs2_inode_cachep);
1766 ocfs2_inode_cachep = NULL;
1767
1768 kmem_cache_destroy(ocfs2_dquot_cachep);
1769 ocfs2_dquot_cachep = NULL;
1770
1771 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1772 ocfs2_qf_chunk_cachep = NULL;
1773}
1774
1775static int ocfs2_get_sector(struct super_block *sb,
1776 struct buffer_head **bh,
1777 int block,
1778 int sect_size)
1779{
1780 if (!sb_set_blocksize(sb, sect_size)) {
1781 mlog(ML_ERROR, "unable to set blocksize\n");
1782 return -EIO;
1783 }
1784
1785 *bh = sb_getblk(sb, block);
1786 if (!*bh) {
1787 mlog_errno(-ENOMEM);
1788 return -ENOMEM;
1789 }
1790 lock_buffer(*bh);
1791 if (!buffer_dirty(*bh))
1792 clear_buffer_uptodate(*bh);
1793 unlock_buffer(*bh);
1794 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1795 wait_on_buffer(*bh);
1796 if (!buffer_uptodate(*bh)) {
1797 mlog_errno(-EIO);
1798 brelse(*bh);
1799 *bh = NULL;
1800 return -EIO;
1801 }
1802
1803 return 0;
1804}
1805
1806static int ocfs2_mount_volume(struct super_block *sb)
1807{
1808 int status = 0;
1809 int unlock_super = 0;
1810 struct ocfs2_super *osb = OCFS2_SB(sb);
1811
1812 if (ocfs2_is_hard_readonly(osb))
1813 goto leave;
1814
1815 mutex_init(&osb->obs_trim_fs_mutex);
1816
1817 status = ocfs2_dlm_init(osb);
1818 if (status < 0) {
1819 mlog_errno(status);
1820 if (status == -EBADR && ocfs2_userspace_stack(osb))
1821 mlog(ML_ERROR, "couldn't mount because cluster name on"
1822 " disk does not match the running cluster name.\n");
1823 goto leave;
1824 }
1825
1826 status = ocfs2_super_lock(osb, 1);
1827 if (status < 0) {
1828 mlog_errno(status);
1829 goto leave;
1830 }
1831 unlock_super = 1;
1832
1833
1834 status = ocfs2_find_slot(osb);
1835 if (status < 0) {
1836 mlog_errno(status);
1837 goto leave;
1838 }
1839
1840
1841 status = ocfs2_init_local_system_inodes(osb);
1842 if (status < 0) {
1843 mlog_errno(status);
1844 goto leave;
1845 }
1846
1847 status = ocfs2_check_volume(osb);
1848 if (status < 0) {
1849 mlog_errno(status);
1850 goto leave;
1851 }
1852
1853 status = ocfs2_truncate_log_init(osb);
1854 if (status < 0)
1855 mlog_errno(status);
1856
1857leave:
1858 if (unlock_super)
1859 ocfs2_super_unlock(osb, 1);
1860
1861 return status;
1862}
1863
1864static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1865{
1866 int tmp, hangup_needed = 0;
1867 struct ocfs2_super *osb = NULL;
1868 char nodestr[12];
1869
1870 trace_ocfs2_dismount_volume(sb);
1871
1872 BUG_ON(!sb);
1873 osb = OCFS2_SB(sb);
1874 BUG_ON(!osb);
1875
1876
1877
1878 ocfs2_filecheck_remove_sysfs(osb);
1879
1880 kset_unregister(osb->osb_dev_kset);
1881
1882
1883 ocfs2_orphan_scan_stop(osb);
1884
1885 ocfs2_disable_quotas(osb);
1886
1887
1888 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1889
1890 cancel_work_sync(&osb->dquot_drop_work);
1891
1892 ocfs2_shutdown_local_alloc(osb);
1893
1894 ocfs2_truncate_log_shutdown(osb);
1895
1896
1897 ocfs2_recovery_exit(osb);
1898
1899 ocfs2_journal_shutdown(osb);
1900
1901 ocfs2_sync_blockdev(sb);
1902
1903 ocfs2_purge_refcount_trees(osb);
1904
1905
1906
1907 if (osb->cconn) {
1908 tmp = ocfs2_super_lock(osb, 1);
1909 if (tmp < 0) {
1910 mlog_errno(tmp);
1911 return;
1912 }
1913 }
1914
1915 if (osb->slot_num != OCFS2_INVALID_SLOT)
1916 ocfs2_put_slot(osb);
1917
1918 if (osb->cconn)
1919 ocfs2_super_unlock(osb, 1);
1920
1921 ocfs2_release_system_inodes(osb);
1922
1923
1924
1925
1926
1927
1928
1929 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1930 !ocfs2_is_hard_readonly(osb))
1931 hangup_needed = 1;
1932
1933 if (osb->cconn)
1934 ocfs2_dlm_shutdown(osb, hangup_needed);
1935
1936 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1937 debugfs_remove_recursive(osb->osb_debug_root);
1938
1939 if (hangup_needed)
1940 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1941
1942 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1943
1944 if (ocfs2_mount_local(osb))
1945 snprintf(nodestr, sizeof(nodestr), "local");
1946 else
1947 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1948
1949 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1950 osb->dev_str, nodestr);
1951
1952 ocfs2_delete_osb(osb);
1953 kfree(osb);
1954 sb->s_dev = 0;
1955 sb->s_fs_info = NULL;
1956}
1957
1958static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1959 unsigned uuid_bytes)
1960{
1961 int i, ret;
1962 char *ptr;
1963
1964 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1965
1966 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1967 if (osb->uuid_str == NULL)
1968 return -ENOMEM;
1969
1970 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1971
1972 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1973 if (ret != 2)
1974 return -EINVAL;
1975
1976 ptr += 2;
1977 }
1978
1979 return 0;
1980}
1981
1982
1983
1984
1985static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1986{
1987 int status = 0;
1988 u64 max_block =
1989 ocfs2_clusters_to_blocks(osb->sb,
1990 osb->osb_clusters_at_boot) - 1;
1991
1992
1993 if (max_block <= (u32)~0ULL)
1994 goto out;
1995
1996
1997
1998 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1999 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2000 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2001 JBD2_FEATURE_INCOMPAT_64BIT))) {
2002 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2003 "Enable the 'block64' journal option with tunefs.ocfs2");
2004 status = -EFBIG;
2005 goto out;
2006 }
2007
2008 out:
2009 return status;
2010}
2011
2012static int ocfs2_initialize_super(struct super_block *sb,
2013 struct buffer_head *bh,
2014 int sector_size,
2015 struct ocfs2_blockcheck_stats *stats)
2016{
2017 int status;
2018 int i, cbits, bbits;
2019 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2020 struct inode *inode = NULL;
2021 struct ocfs2_journal *journal;
2022 struct ocfs2_super *osb;
2023 u64 total_blocks;
2024
2025 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2026 if (!osb) {
2027 status = -ENOMEM;
2028 mlog_errno(status);
2029 goto bail;
2030 }
2031
2032 sb->s_fs_info = osb;
2033 sb->s_op = &ocfs2_sops;
2034 sb->s_d_op = &ocfs2_dentry_ops;
2035 sb->s_export_op = &ocfs2_export_ops;
2036 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2037 sb->dq_op = &ocfs2_quota_operations;
2038 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2039 sb->s_xattr = ocfs2_xattr_handlers;
2040 sb->s_time_gran = 1;
2041 sb->s_flags |= SB_NOATIME;
2042
2043 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2044 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2045 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2046 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2047 sizeof(di->id2.i_super.s_uuid));
2048
2049 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2050
2051 for (i = 0; i < 3; i++)
2052 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2053 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2054
2055 osb->sb = sb;
2056 osb->s_sectsize_bits = blksize_bits(sector_size);
2057 BUG_ON(!osb->s_sectsize_bits);
2058
2059 spin_lock_init(&osb->dc_task_lock);
2060 init_waitqueue_head(&osb->dc_event);
2061 osb->dc_work_sequence = 0;
2062 osb->dc_wake_sequence = 0;
2063 INIT_LIST_HEAD(&osb->blocked_lock_list);
2064 osb->blocked_lock_count = 0;
2065 spin_lock_init(&osb->osb_lock);
2066 spin_lock_init(&osb->osb_xattr_lock);
2067 ocfs2_init_steal_slots(osb);
2068
2069 mutex_init(&osb->system_file_mutex);
2070
2071 atomic_set(&osb->alloc_stats.moves, 0);
2072 atomic_set(&osb->alloc_stats.local_data, 0);
2073 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2074 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2075 atomic_set(&osb->alloc_stats.bg_extends, 0);
2076
2077
2078 osb->osb_ecc_stats = *stats;
2079
2080 ocfs2_init_node_maps(osb);
2081
2082 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2083 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2084
2085 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2086 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2087 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2088 osb->max_slots);
2089 status = -EINVAL;
2090 goto bail;
2091 }
2092
2093 ocfs2_orphan_scan_init(osb);
2094
2095 status = ocfs2_recovery_init(osb);
2096 if (status) {
2097 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2098 mlog_errno(status);
2099 goto bail;
2100 }
2101
2102 init_waitqueue_head(&osb->checkpoint_event);
2103
2104 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2105
2106 osb->slot_num = OCFS2_INVALID_SLOT;
2107
2108 osb->s_xattr_inline_size = le16_to_cpu(
2109 di->id2.i_super.s_xattr_inline_size);
2110
2111 osb->local_alloc_state = OCFS2_LA_UNUSED;
2112 osb->local_alloc_bh = NULL;
2113 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2114
2115 init_waitqueue_head(&osb->osb_mount_event);
2116
2117 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2118 if (status) {
2119 mlog_errno(status);
2120 goto bail;
2121 }
2122
2123 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2124 if (!osb->vol_label) {
2125 mlog(ML_ERROR, "unable to alloc vol label\n");
2126 status = -ENOMEM;
2127 goto bail;
2128 }
2129
2130 osb->slot_recovery_generations =
2131 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2132 GFP_KERNEL);
2133 if (!osb->slot_recovery_generations) {
2134 status = -ENOMEM;
2135 mlog_errno(status);
2136 goto bail;
2137 }
2138
2139 init_waitqueue_head(&osb->osb_wipe_event);
2140 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2141 sizeof(*osb->osb_orphan_wipes),
2142 GFP_KERNEL);
2143 if (!osb->osb_orphan_wipes) {
2144 status = -ENOMEM;
2145 mlog_errno(status);
2146 goto bail;
2147 }
2148
2149 osb->osb_rf_lock_tree = RB_ROOT;
2150
2151 osb->s_feature_compat =
2152 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2153 osb->s_feature_ro_compat =
2154 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2155 osb->s_feature_incompat =
2156 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2157
2158 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2159 mlog(ML_ERROR, "couldn't mount because of unsupported "
2160 "optional features (%x).\n", i);
2161 status = -EINVAL;
2162 goto bail;
2163 }
2164 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2165 mlog(ML_ERROR, "couldn't mount RDWR because of "
2166 "unsupported optional features (%x).\n", i);
2167 status = -EINVAL;
2168 goto bail;
2169 }
2170
2171 if (ocfs2_clusterinfo_valid(osb)) {
2172 osb->osb_stackflags =
2173 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2174 strlcpy(osb->osb_cluster_stack,
2175 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2176 OCFS2_STACK_LABEL_LEN + 1);
2177 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2178 mlog(ML_ERROR,
2179 "couldn't mount because of an invalid "
2180 "cluster stack label (%s) \n",
2181 osb->osb_cluster_stack);
2182 status = -EINVAL;
2183 goto bail;
2184 }
2185 strlcpy(osb->osb_cluster_name,
2186 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2187 OCFS2_CLUSTER_NAME_LEN + 1);
2188 } else {
2189
2190
2191 osb->osb_cluster_stack[0] = '\0';
2192 }
2193
2194 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2206 if (!journal) {
2207 mlog(ML_ERROR, "unable to alloc journal\n");
2208 status = -ENOMEM;
2209 goto bail;
2210 }
2211 osb->journal = journal;
2212 journal->j_osb = osb;
2213
2214 atomic_set(&journal->j_num_trans, 0);
2215 init_rwsem(&journal->j_trans_barrier);
2216 init_waitqueue_head(&journal->j_checkpointed);
2217 spin_lock_init(&journal->j_lock);
2218 journal->j_trans_id = (unsigned long) 1;
2219 INIT_LIST_HEAD(&journal->j_la_cleanups);
2220 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2221 journal->j_state = OCFS2_JOURNAL_FREE;
2222
2223 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2224 init_llist_head(&osb->dquot_drop_list);
2225
2226
2227 osb->s_clustersize_bits =
2228 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2229 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2230
2231 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2232 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2233 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2234 osb->s_clustersize);
2235 status = -EINVAL;
2236 goto bail;
2237 }
2238
2239 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2240 le32_to_cpu(di->i_clusters));
2241
2242 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2243 total_blocks);
2244 if (status) {
2245 mlog(ML_ERROR, "Volume too large "
2246 "to mount safely on this system");
2247 status = -EFBIG;
2248 goto bail;
2249 }
2250
2251 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2252 sizeof(di->id2.i_super.s_uuid))) {
2253 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2254 status = -ENOMEM;
2255 goto bail;
2256 }
2257
2258 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2259 OCFS2_MAX_VOL_LABEL_LEN);
2260 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2261 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2262 osb->first_cluster_group_blkno =
2263 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2264 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2265 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2266 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2267 (unsigned long long)osb->root_blkno,
2268 (unsigned long long)osb->system_dir_blkno,
2269 osb->s_clustersize_bits);
2270
2271 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2272 if (!osb->osb_dlm_debug) {
2273 status = -ENOMEM;
2274 mlog_errno(status);
2275 goto bail;
2276 }
2277
2278 atomic_set(&osb->vol_state, VOLUME_INIT);
2279
2280
2281 status = ocfs2_init_global_system_inodes(osb);
2282 if (status < 0) {
2283 mlog_errno(status);
2284 goto bail;
2285 }
2286
2287
2288
2289
2290 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2291 OCFS2_INVALID_SLOT);
2292 if (!inode) {
2293 status = -EINVAL;
2294 mlog_errno(status);
2295 goto bail;
2296 }
2297
2298 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2299 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2300 iput(inode);
2301
2302 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2303 osb->s_feature_incompat) * 8;
2304
2305 status = ocfs2_init_slot_info(osb);
2306 if (status < 0) {
2307 mlog_errno(status);
2308 goto bail;
2309 }
2310 cleancache_init_shared_fs(sb);
2311
2312 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2313 if (!osb->ocfs2_wq) {
2314 status = -ENOMEM;
2315 mlog_errno(status);
2316 }
2317
2318bail:
2319 return status;
2320}
2321
2322
2323
2324
2325
2326
2327static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2328 struct buffer_head *bh,
2329 u32 blksz,
2330 struct ocfs2_blockcheck_stats *stats)
2331{
2332 int status = -EAGAIN;
2333
2334 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2335 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2336
2337 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2338 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2339 status = ocfs2_block_check_validate(bh->b_data,
2340 bh->b_size,
2341 &di->i_check,
2342 stats);
2343 if (status)
2344 goto out;
2345 }
2346 status = -EINVAL;
2347 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2348 mlog(ML_ERROR, "found superblock with incorrect block "
2349 "size: found %u, should be %u\n",
2350 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2351 blksz);
2352 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2353 OCFS2_MAJOR_REV_LEVEL ||
2354 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2355 OCFS2_MINOR_REV_LEVEL) {
2356 mlog(ML_ERROR, "found superblock with bad version: "
2357 "found %u.%u, should be %u.%u\n",
2358 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2359 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2360 OCFS2_MAJOR_REV_LEVEL,
2361 OCFS2_MINOR_REV_LEVEL);
2362 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2363 mlog(ML_ERROR, "bad block number on superblock: "
2364 "found %llu, should be %llu\n",
2365 (unsigned long long)le64_to_cpu(di->i_blkno),
2366 (unsigned long long)bh->b_blocknr);
2367 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2368 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2369 mlog(ML_ERROR, "bad cluster size found: %u\n",
2370 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2371 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2372 mlog(ML_ERROR, "bad root_blkno: 0\n");
2373 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2374 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2375 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2376 mlog(ML_ERROR,
2377 "Superblock slots found greater than file system "
2378 "maximum: found %u, max %u\n",
2379 le16_to_cpu(di->id2.i_super.s_max_slots),
2380 OCFS2_MAX_SLOTS);
2381 } else {
2382
2383 status = 0;
2384 }
2385 }
2386
2387out:
2388 if (status && status != -EAGAIN)
2389 mlog_errno(status);
2390 return status;
2391}
2392
2393static int ocfs2_check_volume(struct ocfs2_super *osb)
2394{
2395 int status;
2396 int dirty;
2397 int local;
2398 struct ocfs2_dinode *local_alloc = NULL;
2399
2400
2401
2402
2403 status = ocfs2_journal_init(osb->journal, &dirty);
2404 if (status < 0) {
2405 mlog(ML_ERROR, "Could not initialize journal!\n");
2406 goto finally;
2407 }
2408
2409
2410
2411 status = ocfs2_journal_addressable(osb);
2412 if (status)
2413 goto finally;
2414
2415
2416
2417
2418 if (!dirty) {
2419 status = ocfs2_journal_wipe(osb->journal, 0);
2420 if (status < 0) {
2421 mlog_errno(status);
2422 goto finally;
2423 }
2424 } else {
2425 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2426 "unmounted cleanly, recovering it.\n", osb->dev_str);
2427 }
2428
2429 local = ocfs2_mount_local(osb);
2430
2431
2432 status = ocfs2_journal_load(osb->journal, local, dirty);
2433 if (status < 0) {
2434 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2435 goto finally;
2436 }
2437
2438 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2439 jbd2_journal_set_features(osb->journal->j_journal,
2440 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2441 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2442 else
2443 jbd2_journal_clear_features(osb->journal->j_journal,
2444 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2445 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2446
2447 if (dirty) {
2448
2449 status = ocfs2_begin_local_alloc_recovery(osb,
2450 osb->slot_num,
2451 &local_alloc);
2452 if (status < 0) {
2453 mlog_errno(status);
2454 goto finally;
2455 }
2456
2457
2458 }
2459
2460 status = ocfs2_load_local_alloc(osb);
2461 if (status < 0) {
2462 mlog_errno(status);
2463 goto finally;
2464 }
2465
2466 if (dirty) {
2467
2468
2469 osb->local_alloc_copy = local_alloc;
2470 local_alloc = NULL;
2471 }
2472
2473
2474
2475
2476 status = ocfs2_mark_dead_nodes(osb);
2477 if (status < 0) {
2478 mlog_errno(status);
2479 goto finally;
2480 }
2481
2482 status = ocfs2_compute_replay_slots(osb);
2483 if (status < 0)
2484 mlog_errno(status);
2485
2486finally:
2487 kfree(local_alloc);
2488
2489 if (status)
2490 mlog_errno(status);
2491 return status;
2492}
2493
2494
2495
2496
2497
2498
2499
2500static void ocfs2_delete_osb(struct ocfs2_super *osb)
2501{
2502
2503
2504
2505 if (osb->ocfs2_wq)
2506 destroy_workqueue(osb->ocfs2_wq);
2507
2508 ocfs2_free_slot_info(osb);
2509
2510 kfree(osb->osb_orphan_wipes);
2511 kfree(osb->slot_recovery_generations);
2512
2513
2514
2515
2516
2517 kfree(osb->journal);
2518 kfree(osb->local_alloc_copy);
2519 kfree(osb->uuid_str);
2520 kfree(osb->vol_label);
2521 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2522 memset(osb, 0, sizeof(struct ocfs2_super));
2523}
2524
2525
2526
2527
2528
2529
2530
2531static int ocfs2_handle_error(struct super_block *sb)
2532{
2533 struct ocfs2_super *osb = OCFS2_SB(sb);
2534 int rv = 0;
2535
2536 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2537 pr_crit("On-disk corruption discovered. "
2538 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2539
2540 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2541 panic("OCFS2: (device %s): panic forced after error\n",
2542 sb->s_id);
2543 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2544 pr_crit("OCFS2: Returning error to the calling process.\n");
2545 rv = -EIO;
2546 } else {
2547 rv = -EROFS;
2548 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2549 return rv;
2550
2551 pr_crit("OCFS2: File system is now read-only.\n");
2552 sb->s_flags |= SB_RDONLY;
2553 ocfs2_set_ro_flag(osb, 0);
2554 }
2555
2556 return rv;
2557}
2558
2559int __ocfs2_error(struct super_block *sb, const char *function,
2560 const char *fmt, ...)
2561{
2562 struct va_format vaf;
2563 va_list args;
2564
2565 va_start(args, fmt);
2566 vaf.fmt = fmt;
2567 vaf.va = &args;
2568
2569
2570
2571 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2572 sb->s_id, function, &vaf);
2573
2574 va_end(args);
2575
2576 return ocfs2_handle_error(sb);
2577}
2578
2579
2580
2581
2582void __ocfs2_abort(struct super_block *sb, const char *function,
2583 const char *fmt, ...)
2584{
2585 struct va_format vaf;
2586 va_list args;
2587
2588 va_start(args, fmt);
2589
2590 vaf.fmt = fmt;
2591 vaf.va = &args;
2592
2593 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2594 sb->s_id, function, &vaf);
2595
2596 va_end(args);
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2610 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2611 ocfs2_handle_error(sb);
2612}
2613
2614
2615
2616
2617
2618void ocfs2_block_signals(sigset_t *oldset)
2619{
2620 int rc;
2621 sigset_t blocked;
2622
2623 sigfillset(&blocked);
2624 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2625 BUG_ON(rc);
2626}
2627
2628void ocfs2_unblock_signals(sigset_t *oldset)
2629{
2630 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2631 BUG_ON(rc);
2632}
2633
2634module_init(ocfs2_init);
2635module_exit(ocfs2_exit);
2636
