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10#include <linux/module.h>
11#include <linux/fs.h>
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <linux/highmem.h>
15#include <linux/init.h>
16#include <linux/random.h>
17#include <linux/statfs.h>
18#include <linux/moduleparam.h>
19#include <linux/blkdev.h>
20#include <linux/socket.h>
21#include <linux/inet.h>
22#include <linux/parser.h>
23#include <linux/crc32.h>
24#include <linux/debugfs.h>
25#include <linux/mount.h>
26#include <linux/seq_file.h>
27#include <linux/quotaops.h>
28#include <linux/cleancache.h>
29#include <linux/signal.h>
30
31#define CREATE_TRACE_POINTS
32#include "ocfs2_trace.h"
33
34#include <cluster/masklog.h>
35
36#include "ocfs2.h"
37
38
39#include "ocfs1_fs_compat.h"
40
41#include "alloc.h"
42#include "aops.h"
43#include "blockcheck.h"
44#include "dlmglue.h"
45#include "export.h"
46#include "extent_map.h"
47#include "heartbeat.h"
48#include "inode.h"
49#include "journal.h"
50#include "localalloc.h"
51#include "namei.h"
52#include "slot_map.h"
53#include "super.h"
54#include "sysfile.h"
55#include "uptodate.h"
56#include "xattr.h"
57#include "quota.h"
58#include "refcounttree.h"
59#include "suballoc.h"
60
61#include "buffer_head_io.h"
62#include "filecheck.h"
63
64static struct kmem_cache *ocfs2_inode_cachep;
65struct kmem_cache *ocfs2_dquot_cachep;
66struct kmem_cache *ocfs2_qf_chunk_cachep;
67
68static struct dentry *ocfs2_debugfs_root;
69
70MODULE_AUTHOR("Oracle");
71MODULE_LICENSE("GPL");
72MODULE_DESCRIPTION("OCFS2 cluster file system");
73
74struct mount_options
75{
76 unsigned long commit_interval;
77 unsigned long mount_opt;
78 unsigned int atime_quantum;
79 unsigned short slot;
80 int localalloc_opt;
81 unsigned int resv_level;
82 int dir_resv_level;
83 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
84};
85
86static int ocfs2_parse_options(struct super_block *sb, char *options,
87 struct mount_options *mopt,
88 int is_remount);
89static int ocfs2_check_set_options(struct super_block *sb,
90 struct mount_options *options);
91static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
92static void ocfs2_put_super(struct super_block *sb);
93static int ocfs2_mount_volume(struct super_block *sb);
94static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
95static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
96static int ocfs2_initialize_mem_caches(void);
97static void ocfs2_free_mem_caches(void);
98static void ocfs2_delete_osb(struct ocfs2_super *osb);
99
100static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
101
102static int ocfs2_sync_fs(struct super_block *sb, int wait);
103
104static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
105static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
106static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
107static int ocfs2_check_volume(struct ocfs2_super *osb);
108static int ocfs2_verify_volume(struct ocfs2_dinode *di,
109 struct buffer_head *bh,
110 u32 sectsize,
111 struct ocfs2_blockcheck_stats *stats);
112static int ocfs2_initialize_super(struct super_block *sb,
113 struct buffer_head *bh,
114 int sector_size,
115 struct ocfs2_blockcheck_stats *stats);
116static int ocfs2_get_sector(struct super_block *sb,
117 struct buffer_head **bh,
118 int block,
119 int sect_size);
120static struct inode *ocfs2_alloc_inode(struct super_block *sb);
121static void ocfs2_free_inode(struct inode *inode);
122static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
123static int ocfs2_enable_quotas(struct ocfs2_super *osb);
124static void ocfs2_disable_quotas(struct ocfs2_super *osb);
125
126static struct dquot **ocfs2_get_dquots(struct inode *inode)
127{
128 return OCFS2_I(inode)->i_dquot;
129}
130
131static const struct super_operations ocfs2_sops = {
132 .statfs = ocfs2_statfs,
133 .alloc_inode = ocfs2_alloc_inode,
134 .free_inode = ocfs2_free_inode,
135 .drop_inode = ocfs2_drop_inode,
136 .evict_inode = ocfs2_evict_inode,
137 .sync_fs = ocfs2_sync_fs,
138 .put_super = ocfs2_put_super,
139 .remount_fs = ocfs2_remount,
140 .show_options = ocfs2_show_options,
141 .quota_read = ocfs2_quota_read,
142 .quota_write = ocfs2_quota_write,
143 .get_dquots = ocfs2_get_dquots,
144};
145
146enum {
147 Opt_barrier,
148 Opt_err_panic,
149 Opt_err_ro,
150 Opt_intr,
151 Opt_nointr,
152 Opt_hb_none,
153 Opt_hb_local,
154 Opt_hb_global,
155 Opt_data_ordered,
156 Opt_data_writeback,
157 Opt_atime_quantum,
158 Opt_slot,
159 Opt_commit,
160 Opt_localalloc,
161 Opt_localflocks,
162 Opt_stack,
163 Opt_user_xattr,
164 Opt_nouser_xattr,
165 Opt_inode64,
166 Opt_acl,
167 Opt_noacl,
168 Opt_usrquota,
169 Opt_grpquota,
170 Opt_coherency_buffered,
171 Opt_coherency_full,
172 Opt_resv_level,
173 Opt_dir_resv_level,
174 Opt_journal_async_commit,
175 Opt_err_cont,
176 Opt_nocluster,
177 Opt_err,
178};
179
180static const match_table_t tokens = {
181 {Opt_barrier, "barrier=%u"},
182 {Opt_err_panic, "errors=panic"},
183 {Opt_err_ro, "errors=remount-ro"},
184 {Opt_intr, "intr"},
185 {Opt_nointr, "nointr"},
186 {Opt_hb_none, OCFS2_HB_NONE},
187 {Opt_hb_local, OCFS2_HB_LOCAL},
188 {Opt_hb_global, OCFS2_HB_GLOBAL},
189 {Opt_data_ordered, "data=ordered"},
190 {Opt_data_writeback, "data=writeback"},
191 {Opt_atime_quantum, "atime_quantum=%u"},
192 {Opt_slot, "preferred_slot=%u"},
193 {Opt_commit, "commit=%u"},
194 {Opt_localalloc, "localalloc=%d"},
195 {Opt_localflocks, "localflocks"},
196 {Opt_stack, "cluster_stack=%s"},
197 {Opt_user_xattr, "user_xattr"},
198 {Opt_nouser_xattr, "nouser_xattr"},
199 {Opt_inode64, "inode64"},
200 {Opt_acl, "acl"},
201 {Opt_noacl, "noacl"},
202 {Opt_usrquota, "usrquota"},
203 {Opt_grpquota, "grpquota"},
204 {Opt_coherency_buffered, "coherency=buffered"},
205 {Opt_coherency_full, "coherency=full"},
206 {Opt_resv_level, "resv_level=%u"},
207 {Opt_dir_resv_level, "dir_resv_level=%u"},
208 {Opt_journal_async_commit, "journal_async_commit"},
209 {Opt_err_cont, "errors=continue"},
210 {Opt_nocluster, "nocluster"},
211 {Opt_err, NULL}
212};
213
214#ifdef CONFIG_DEBUG_FS
215static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
216{
217 struct ocfs2_cluster_connection *cconn = osb->cconn;
218 struct ocfs2_recovery_map *rm = osb->recovery_map;
219 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
220 int i, out = 0;
221 unsigned long flags;
222
223 out += scnprintf(buf + out, len - out,
224 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
225 "Device", osb->dev_str, osb->uuid_str,
226 osb->fs_generation, osb->vol_label);
227
228 out += scnprintf(buf + out, len - out,
229 "%10s => State: %d Flags: 0x%lX\n", "Volume",
230 atomic_read(&osb->vol_state), osb->osb_flags);
231
232 out += scnprintf(buf + out, len - out,
233 "%10s => Block: %lu Cluster: %d\n", "Sizes",
234 osb->sb->s_blocksize, osb->s_clustersize);
235
236 out += scnprintf(buf + out, len - out,
237 "%10s => Compat: 0x%X Incompat: 0x%X "
238 "ROcompat: 0x%X\n",
239 "Features", osb->s_feature_compat,
240 osb->s_feature_incompat, osb->s_feature_ro_compat);
241
242 out += scnprintf(buf + out, len - out,
243 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
244 osb->s_mount_opt, osb->s_atime_quantum);
245
246 if (cconn) {
247 out += scnprintf(buf + out, len - out,
248 "%10s => Stack: %s Name: %*s "
249 "Version: %d.%d\n", "Cluster",
250 (*osb->osb_cluster_stack == '\0' ?
251 "o2cb" : osb->osb_cluster_stack),
252 cconn->cc_namelen, cconn->cc_name,
253 cconn->cc_version.pv_major,
254 cconn->cc_version.pv_minor);
255 }
256
257 spin_lock_irqsave(&osb->dc_task_lock, flags);
258 out += scnprintf(buf + out, len - out,
259 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
260 "WorkSeq: %lu\n", "DownCnvt",
261 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
262 osb->blocked_lock_count, osb->dc_wake_sequence,
263 osb->dc_work_sequence);
264 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
265
266 spin_lock(&osb->osb_lock);
267 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
268 "Recovery",
269 (osb->recovery_thread_task ?
270 task_pid_nr(osb->recovery_thread_task) : -1));
271 if (rm->rm_used == 0)
272 out += scnprintf(buf + out, len - out, " None\n");
273 else {
274 for (i = 0; i < rm->rm_used; i++)
275 out += scnprintf(buf + out, len - out, " %d",
276 rm->rm_entries[i]);
277 out += scnprintf(buf + out, len - out, "\n");
278 }
279 spin_unlock(&osb->osb_lock);
280
281 out += scnprintf(buf + out, len - out,
282 "%10s => Pid: %d Interval: %lu\n", "Commit",
283 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
284 osb->osb_commit_interval);
285
286 out += scnprintf(buf + out, len - out,
287 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
288 "Journal", osb->journal->j_state,
289 osb->journal->j_trans_id,
290 atomic_read(&osb->journal->j_num_trans));
291
292 out += scnprintf(buf + out, len - out,
293 "%10s => GlobalAllocs: %d LocalAllocs: %d "
294 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
295 "Stats",
296 atomic_read(&osb->alloc_stats.bitmap_data),
297 atomic_read(&osb->alloc_stats.local_data),
298 atomic_read(&osb->alloc_stats.bg_allocs),
299 atomic_read(&osb->alloc_stats.moves),
300 atomic_read(&osb->alloc_stats.bg_extends));
301
302 out += scnprintf(buf + out, len - out,
303 "%10s => State: %u Descriptor: %llu Size: %u bits "
304 "Default: %u bits\n",
305 "LocalAlloc", osb->local_alloc_state,
306 (unsigned long long)osb->la_last_gd,
307 osb->local_alloc_bits, osb->local_alloc_default_bits);
308
309 spin_lock(&osb->osb_lock);
310 out += scnprintf(buf + out, len - out,
311 "%10s => InodeSlot: %d StolenInodes: %d, "
312 "MetaSlot: %d StolenMeta: %d\n", "Steal",
313 osb->s_inode_steal_slot,
314 atomic_read(&osb->s_num_inodes_stolen),
315 osb->s_meta_steal_slot,
316 atomic_read(&osb->s_num_meta_stolen));
317 spin_unlock(&osb->osb_lock);
318
319 out += scnprintf(buf + out, len - out, "OrphanScan => ");
320 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ",
321 os->os_count, os->os_seqno);
322 out += scnprintf(buf + out, len - out, " Last Scan: ");
323 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
324 out += scnprintf(buf + out, len - out, "Disabled\n");
325 else
326 out += scnprintf(buf + out, len - out, "%lu seconds ago\n",
327 (unsigned long)(ktime_get_seconds() - os->os_scantime));
328
329 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n",
330 "Slots", "Num", "RecoGen");
331 for (i = 0; i < osb->max_slots; ++i) {
332 out += scnprintf(buf + out, len - out,
333 "%10s %c %3d %10d\n",
334 " ",
335 (i == osb->slot_num ? '*' : ' '),
336 i, osb->slot_recovery_generations[i]);
337 }
338
339 return out;
340}
341
342static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
343{
344 struct ocfs2_super *osb = inode->i_private;
345 char *buf = NULL;
346
347 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
348 if (!buf)
349 goto bail;
350
351 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
352
353 file->private_data = buf;
354
355 return 0;
356bail:
357 return -ENOMEM;
358}
359
360static int ocfs2_debug_release(struct inode *inode, struct file *file)
361{
362 kfree(file->private_data);
363 return 0;
364}
365
366static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
367 size_t nbytes, loff_t *ppos)
368{
369 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
370 i_size_read(file->f_mapping->host));
371}
372#else
373static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
374{
375 return 0;
376}
377static int ocfs2_debug_release(struct inode *inode, struct file *file)
378{
379 return 0;
380}
381static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382 size_t nbytes, loff_t *ppos)
383{
384 return 0;
385}
386#endif
387
388static const struct file_operations ocfs2_osb_debug_fops = {
389 .open = ocfs2_osb_debug_open,
390 .release = ocfs2_debug_release,
391 .read = ocfs2_debug_read,
392 .llseek = generic_file_llseek,
393};
394
395static int ocfs2_sync_fs(struct super_block *sb, int wait)
396{
397 int status;
398 tid_t target;
399 struct ocfs2_super *osb = OCFS2_SB(sb);
400
401 if (ocfs2_is_hard_readonly(osb))
402 return -EROFS;
403
404 if (wait) {
405 status = ocfs2_flush_truncate_log(osb);
406 if (status < 0)
407 mlog_errno(status);
408 } else {
409 ocfs2_schedule_truncate_log_flush(osb, 0);
410 }
411
412 if (jbd2_journal_start_commit(osb->journal->j_journal,
413 &target)) {
414 if (wait)
415 jbd2_log_wait_commit(osb->journal->j_journal,
416 target);
417 }
418 return 0;
419}
420
421static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
422{
423 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
424 && (ino == USER_QUOTA_SYSTEM_INODE
425 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
426 return 0;
427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
428 && (ino == GROUP_QUOTA_SYSTEM_INODE
429 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
430 return 0;
431 return 1;
432}
433
434static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
435{
436 struct inode *new = NULL;
437 int status = 0;
438 int i;
439
440 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
441 if (IS_ERR(new)) {
442 status = PTR_ERR(new);
443 mlog_errno(status);
444 goto bail;
445 }
446 osb->root_inode = new;
447
448 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->sys_root_inode = new;
455
456 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
457 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
458 if (!ocfs2_need_system_inode(osb, i))
459 continue;
460 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
461 if (!new) {
462 ocfs2_release_system_inodes(osb);
463 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
464 mlog_errno(status);
465 mlog(ML_ERROR, "Unable to load system inode %d, "
466 "possibly corrupt fs?", i);
467 goto bail;
468 }
469
470 iput(new);
471 }
472
473bail:
474 if (status)
475 mlog_errno(status);
476 return status;
477}
478
479static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
480{
481 struct inode *new = NULL;
482 int status = 0;
483 int i;
484
485 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
486 i < NUM_SYSTEM_INODES;
487 i++) {
488 if (!ocfs2_need_system_inode(osb, i))
489 continue;
490 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
491 if (!new) {
492 ocfs2_release_system_inodes(osb);
493 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
494 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
495 status, i, osb->slot_num);
496 goto bail;
497 }
498
499 iput(new);
500 }
501
502bail:
503 if (status)
504 mlog_errno(status);
505 return status;
506}
507
508static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
509{
510 int i;
511 struct inode *inode;
512
513 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
514 inode = osb->global_system_inodes[i];
515 if (inode) {
516 iput(inode);
517 osb->global_system_inodes[i] = NULL;
518 }
519 }
520
521 inode = osb->sys_root_inode;
522 if (inode) {
523 iput(inode);
524 osb->sys_root_inode = NULL;
525 }
526
527 inode = osb->root_inode;
528 if (inode) {
529 iput(inode);
530 osb->root_inode = NULL;
531 }
532
533 if (!osb->local_system_inodes)
534 return;
535
536 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
537 if (osb->local_system_inodes[i]) {
538 iput(osb->local_system_inodes[i]);
539 osb->local_system_inodes[i] = NULL;
540 }
541 }
542
543 kfree(osb->local_system_inodes);
544 osb->local_system_inodes = NULL;
545}
546
547
548static struct inode *ocfs2_alloc_inode(struct super_block *sb)
549{
550 struct ocfs2_inode_info *oi;
551
552 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
553 if (!oi)
554 return NULL;
555
556 oi->i_sync_tid = 0;
557 oi->i_datasync_tid = 0;
558 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
559
560 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
561 return &oi->vfs_inode;
562}
563
564static void ocfs2_free_inode(struct inode *inode)
565{
566 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
567}
568
569static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
570 unsigned int cbits)
571{
572 unsigned int bytes = 1 << cbits;
573 unsigned int trim = bytes;
574 unsigned int bitshift = 32;
575
576
577
578
579
580
581
582#if BITS_PER_LONG == 32
583 BUILD_BUG_ON(sizeof(sector_t) != 8);
584
585
586
587 if (bytes > PAGE_SIZE) {
588 bytes = PAGE_SIZE;
589 trim = 1;
590
591
592
593
594 bitshift = 31;
595 }
596#endif
597
598
599
600
601
602
603 return (((unsigned long long)bytes) << bitshift) - trim;
604}
605
606static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
607{
608 int incompat_features;
609 int ret = 0;
610 struct mount_options parsed_options;
611 struct ocfs2_super *osb = OCFS2_SB(sb);
612 u32 tmp;
613
614 sync_filesystem(sb);
615
616 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
617 !ocfs2_check_set_options(sb, &parsed_options)) {
618 ret = -EINVAL;
619 goto out;
620 }
621
622 tmp = OCFS2_MOUNT_NOCLUSTER;
623 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
624 ret = -EINVAL;
625 mlog(ML_ERROR, "Cannot change nocluster option on remount\n");
626 goto out;
627 }
628
629 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
630 OCFS2_MOUNT_HB_NONE;
631 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
632 ret = -EINVAL;
633 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
634 goto out;
635 }
636
637 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
638 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
639 ret = -EINVAL;
640 mlog(ML_ERROR, "Cannot change data mode on remount\n");
641 goto out;
642 }
643
644
645
646 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
647 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
648 ret = -EINVAL;
649 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
650 goto out;
651 }
652
653
654 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
655
656 if (*flags & SB_RDONLY) {
657 ret = ocfs2_susp_quotas(osb, 0);
658 if (ret < 0)
659 goto out;
660 }
661
662
663 spin_lock(&osb->osb_lock);
664 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
665 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
666 ret = -EROFS;
667 goto unlock_osb;
668 }
669
670 if (*flags & SB_RDONLY) {
671 sb->s_flags |= SB_RDONLY;
672 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
673 } else {
674 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
675 mlog(ML_ERROR, "Cannot remount RDWR "
676 "filesystem due to previous errors.\n");
677 ret = -EROFS;
678 goto unlock_osb;
679 }
680 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
681 if (incompat_features) {
682 mlog(ML_ERROR, "Cannot remount RDWR because "
683 "of unsupported optional features "
684 "(%x).\n", incompat_features);
685 ret = -EINVAL;
686 goto unlock_osb;
687 }
688 sb->s_flags &= ~SB_RDONLY;
689 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
690 }
691 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
692unlock_osb:
693 spin_unlock(&osb->osb_lock);
694
695 if (!ret && !(*flags & SB_RDONLY)) {
696 if (sb_any_quota_suspended(sb))
697 ret = ocfs2_susp_quotas(osb, 1);
698 else
699 ret = ocfs2_enable_quotas(osb);
700 if (ret < 0) {
701
702 spin_lock(&osb->osb_lock);
703 sb->s_flags |= SB_RDONLY;
704 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
705 spin_unlock(&osb->osb_lock);
706 goto out;
707 }
708 }
709 }
710
711 if (!ret) {
712
713
714 osb->s_mount_opt = parsed_options.mount_opt;
715 osb->s_atime_quantum = parsed_options.atime_quantum;
716 osb->preferred_slot = parsed_options.slot;
717 if (parsed_options.commit_interval)
718 osb->osb_commit_interval = parsed_options.commit_interval;
719
720 if (!ocfs2_is_hard_readonly(osb))
721 ocfs2_set_journal_params(osb);
722
723 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
724 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
725 SB_POSIXACL : 0);
726 }
727out:
728 return ret;
729}
730
731static int ocfs2_sb_probe(struct super_block *sb,
732 struct buffer_head **bh,
733 int *sector_size,
734 struct ocfs2_blockcheck_stats *stats)
735{
736 int status, tmpstat;
737 struct ocfs1_vol_disk_hdr *hdr;
738 struct ocfs2_dinode *di;
739 int blksize;
740
741 *bh = NULL;
742
743
744 *sector_size = bdev_logical_block_size(sb->s_bdev);
745 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
746 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
747 *sector_size, OCFS2_MAX_BLOCKSIZE);
748 status = -EINVAL;
749 goto bail;
750 }
751
752
753 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
754 *sector_size = OCFS2_MIN_BLOCKSIZE;
755
756
757 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
758 if (status < 0) {
759 mlog_errno(status);
760 goto bail;
761 }
762 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
763 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
764 mlog(ML_ERROR, "incompatible version: %u.%u\n",
765 hdr->major_version, hdr->minor_version);
766 status = -EINVAL;
767 }
768 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
769 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
770 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
771 hdr->signature);
772 status = -EINVAL;
773 }
774 brelse(*bh);
775 *bh = NULL;
776 if (status < 0) {
777 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
778 "upgraded before mounting with ocfs v2\n");
779 goto bail;
780 }
781
782
783
784
785
786
787 status = -EINVAL;
788 for (blksize = *sector_size;
789 blksize <= OCFS2_MAX_BLOCKSIZE;
790 blksize <<= 1) {
791 tmpstat = ocfs2_get_sector(sb, bh,
792 OCFS2_SUPER_BLOCK_BLKNO,
793 blksize);
794 if (tmpstat < 0) {
795 status = tmpstat;
796 mlog_errno(status);
797 break;
798 }
799 di = (struct ocfs2_dinode *) (*bh)->b_data;
800 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
801 spin_lock_init(&stats->b_lock);
802 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
803 if (tmpstat < 0) {
804 brelse(*bh);
805 *bh = NULL;
806 }
807 if (tmpstat != -EAGAIN) {
808 status = tmpstat;
809 break;
810 }
811 }
812
813bail:
814 return status;
815}
816
817static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
818{
819 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
820
821 if (osb->s_mount_opt & hb_enabled) {
822 if (ocfs2_mount_local(osb)) {
823 mlog(ML_ERROR, "Cannot heartbeat on a locally "
824 "mounted device.\n");
825 return -EINVAL;
826 }
827 if (ocfs2_userspace_stack(osb)) {
828 mlog(ML_ERROR, "Userspace stack expected, but "
829 "o2cb heartbeat arguments passed to mount\n");
830 return -EINVAL;
831 }
832 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
833 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
834 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
835 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
836 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
837 return -EINVAL;
838 }
839 }
840
841 if (!(osb->s_mount_opt & hb_enabled)) {
842 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
843 !ocfs2_userspace_stack(osb)) {
844 mlog(ML_ERROR, "Heartbeat has to be started to mount "
845 "a read-write clustered device.\n");
846 return -EINVAL;
847 }
848 }
849
850 return 0;
851}
852
853
854
855
856
857
858static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
859 struct mount_options *mopt)
860{
861 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
862 mlog(ML_ERROR,
863 "cluster stack passed to mount, but this filesystem "
864 "does not support it\n");
865 return -EINVAL;
866 }
867
868 if (ocfs2_userspace_stack(osb) &&
869 !(osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
870 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
871 OCFS2_STACK_LABEL_LEN)) {
872 mlog(ML_ERROR,
873 "cluster stack passed to mount (\"%s\") does not "
874 "match the filesystem (\"%s\")\n",
875 mopt->cluster_stack,
876 osb->osb_cluster_stack);
877 return -EINVAL;
878 }
879
880 return 0;
881}
882
883static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
884{
885 int type;
886 struct super_block *sb = osb->sb;
887 unsigned int feature[OCFS2_MAXQUOTAS] = {
888 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
889 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
890 int status = 0;
891
892 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
893 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
894 continue;
895 if (unsuspend)
896 status = dquot_resume(sb, type);
897 else {
898 struct ocfs2_mem_dqinfo *oinfo;
899
900
901 oinfo = sb_dqinfo(sb, type)->dqi_priv;
902 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
903 status = dquot_suspend(sb, type);
904 }
905 if (status < 0)
906 break;
907 }
908 if (status < 0)
909 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
910 "remount (error = %d).\n", status);
911 return status;
912}
913
914static int ocfs2_enable_quotas(struct ocfs2_super *osb)
915{
916 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
917 struct super_block *sb = osb->sb;
918 unsigned int feature[OCFS2_MAXQUOTAS] = {
919 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
920 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
921 unsigned int ino[OCFS2_MAXQUOTAS] = {
922 LOCAL_USER_QUOTA_SYSTEM_INODE,
923 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
924 int status;
925 int type;
926
927 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
928 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
929 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
930 continue;
931 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
932 osb->slot_num);
933 if (!inode[type]) {
934 status = -ENOENT;
935 goto out_quota_off;
936 }
937 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2,
938 DQUOT_USAGE_ENABLED);
939 if (status < 0)
940 goto out_quota_off;
941 }
942
943 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
944 iput(inode[type]);
945 return 0;
946out_quota_off:
947 ocfs2_disable_quotas(osb);
948 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
949 iput(inode[type]);
950 mlog_errno(status);
951 return status;
952}
953
954static void ocfs2_disable_quotas(struct ocfs2_super *osb)
955{
956 int type;
957 struct inode *inode;
958 struct super_block *sb = osb->sb;
959 struct ocfs2_mem_dqinfo *oinfo;
960
961
962
963 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
964 if (!sb_has_quota_loaded(sb, type))
965 continue;
966 oinfo = sb_dqinfo(sb, type)->dqi_priv;
967 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
968 inode = igrab(sb->s_dquot.files[type]);
969
970
971
972 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
973 DQUOT_LIMITS_ENABLED);
974 iput(inode);
975 }
976}
977
978static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
979{
980 struct dentry *root;
981 int status, sector_size;
982 struct mount_options parsed_options;
983 struct inode *inode = NULL;
984 struct ocfs2_super *osb = NULL;
985 struct buffer_head *bh = NULL;
986 char nodestr[12];
987 struct ocfs2_blockcheck_stats stats;
988
989 trace_ocfs2_fill_super(sb, data, silent);
990
991 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
992 status = -EINVAL;
993 goto read_super_error;
994 }
995
996
997 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
998 if (status < 0) {
999 mlog(ML_ERROR, "superblock probe failed!\n");
1000 goto read_super_error;
1001 }
1002
1003 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1004 osb = OCFS2_SB(sb);
1005 if (status < 0) {
1006 mlog_errno(status);
1007 goto read_super_error;
1008 }
1009 brelse(bh);
1010 bh = NULL;
1011
1012 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1013 status = -EINVAL;
1014 goto read_super_error;
1015 }
1016 osb->s_mount_opt = parsed_options.mount_opt;
1017 osb->s_atime_quantum = parsed_options.atime_quantum;
1018 osb->preferred_slot = parsed_options.slot;
1019 osb->osb_commit_interval = parsed_options.commit_interval;
1020
1021 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1022 osb->osb_resv_level = parsed_options.resv_level;
1023 osb->osb_dir_resv_level = parsed_options.resv_level;
1024 if (parsed_options.dir_resv_level == -1)
1025 osb->osb_dir_resv_level = parsed_options.resv_level;
1026 else
1027 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1028
1029 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1030 if (status)
1031 goto read_super_error;
1032
1033 sb->s_magic = OCFS2_SUPER_MAGIC;
1034
1035 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1036 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1037
1038
1039
1040 if (bdev_read_only(sb->s_bdev)) {
1041 if (!sb_rdonly(sb)) {
1042 status = -EACCES;
1043 mlog(ML_ERROR, "Readonly device detected but readonly "
1044 "mount was not specified.\n");
1045 goto read_super_error;
1046 }
1047
1048
1049
1050 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1051 status = -EROFS;
1052 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1053 "device.\n");
1054 goto read_super_error;
1055 }
1056
1057 status = ocfs2_check_journals_nolocks(osb);
1058 if (status < 0) {
1059 if (status == -EROFS)
1060 mlog(ML_ERROR, "Recovery required on readonly "
1061 "file system, but write access is "
1062 "unavailable.\n");
1063 else
1064 mlog_errno(status);
1065 goto read_super_error;
1066 }
1067
1068 ocfs2_set_ro_flag(osb, 1);
1069
1070 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1071 "Cluster services will not be used for this mount. "
1072 "Recovery will be skipped.\n", osb->dev_str);
1073 }
1074
1075 if (!ocfs2_is_hard_readonly(osb)) {
1076 if (sb_rdonly(sb))
1077 ocfs2_set_ro_flag(osb, 0);
1078 }
1079
1080 status = ocfs2_verify_heartbeat(osb);
1081 if (status < 0) {
1082 mlog_errno(status);
1083 goto read_super_error;
1084 }
1085
1086 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1087 ocfs2_debugfs_root);
1088
1089 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1090 osb, &ocfs2_osb_debug_fops);
1091
1092 if (ocfs2_meta_ecc(osb))
1093 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1094 osb->osb_debug_root);
1095
1096 status = ocfs2_mount_volume(sb);
1097 if (status < 0)
1098 goto read_super_error;
1099
1100 if (osb->root_inode)
1101 inode = igrab(osb->root_inode);
1102
1103 if (!inode) {
1104 status = -EIO;
1105 mlog_errno(status);
1106 goto read_super_error;
1107 }
1108
1109 root = d_make_root(inode);
1110 if (!root) {
1111 status = -ENOMEM;
1112 mlog_errno(status);
1113 goto read_super_error;
1114 }
1115
1116 sb->s_root = root;
1117
1118 ocfs2_complete_mount_recovery(osb);
1119
1120 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1121 &ocfs2_kset->kobj);
1122 if (!osb->osb_dev_kset) {
1123 status = -ENOMEM;
1124 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1125 goto read_super_error;
1126 }
1127
1128
1129
1130 if (ocfs2_filecheck_create_sysfs(osb)) {
1131 status = -ENOMEM;
1132 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1133 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1134 goto read_super_error;
1135 }
1136
1137 if (ocfs2_mount_local(osb))
1138 snprintf(nodestr, sizeof(nodestr), "local");
1139 else
1140 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1141
1142 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1143 "with %s data mode.\n",
1144 osb->dev_str, nodestr, osb->slot_num,
1145 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1146 "ordered");
1147
1148 if ((osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER) &&
1149 !(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT))
1150 printk(KERN_NOTICE "ocfs2: The shared device (%s) is mounted "
1151 "without cluster aware mode.\n", osb->dev_str);
1152
1153 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1154 wake_up(&osb->osb_mount_event);
1155
1156
1157
1158
1159 if (!sb_rdonly(sb)) {
1160 status = ocfs2_enable_quotas(osb);
1161 if (status < 0) {
1162
1163
1164 mlog_errno(status);
1165 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1166 wake_up(&osb->osb_mount_event);
1167 return status;
1168 }
1169 }
1170
1171 ocfs2_complete_quota_recovery(osb);
1172
1173
1174 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1175 wake_up(&osb->osb_mount_event);
1176
1177
1178 ocfs2_orphan_scan_start(osb);
1179
1180 return status;
1181
1182read_super_error:
1183 brelse(bh);
1184
1185 if (status)
1186 mlog_errno(status);
1187
1188 if (osb) {
1189 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1190 wake_up(&osb->osb_mount_event);
1191 ocfs2_dismount_volume(sb, 1);
1192 }
1193
1194 return status;
1195}
1196
1197static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1198 int flags,
1199 const char *dev_name,
1200 void *data)
1201{
1202 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1203}
1204
1205static struct file_system_type ocfs2_fs_type = {
1206 .owner = THIS_MODULE,
1207 .name = "ocfs2",
1208 .mount = ocfs2_mount,
1209 .kill_sb = kill_block_super,
1210 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1211 .next = NULL
1212};
1213MODULE_ALIAS_FS("ocfs2");
1214
1215static int ocfs2_check_set_options(struct super_block *sb,
1216 struct mount_options *options)
1217{
1218 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1219 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1220 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1221 mlog(ML_ERROR, "User quotas were requested, but this "
1222 "filesystem does not have the feature enabled.\n");
1223 return 0;
1224 }
1225 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1226 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1227 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1228 mlog(ML_ERROR, "Group quotas were requested, but this "
1229 "filesystem does not have the feature enabled.\n");
1230 return 0;
1231 }
1232 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1233 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1234 mlog(ML_ERROR, "ACL support requested but extended attributes "
1235 "feature is not enabled\n");
1236 return 0;
1237 }
1238
1239 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1240 OCFS2_MOUNT_NO_POSIX_ACL))) {
1241 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1242 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1243 else
1244 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1245 }
1246 return 1;
1247}
1248
1249static int ocfs2_parse_options(struct super_block *sb,
1250 char *options,
1251 struct mount_options *mopt,
1252 int is_remount)
1253{
1254 int status, user_stack = 0;
1255 char *p;
1256 u32 tmp;
1257 int token, option;
1258 substring_t args[MAX_OPT_ARGS];
1259
1260 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1261
1262 mopt->commit_interval = 0;
1263 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1264 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1265 mopt->slot = OCFS2_INVALID_SLOT;
1266 mopt->localalloc_opt = -1;
1267 mopt->cluster_stack[0] = '\0';
1268 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1269 mopt->dir_resv_level = -1;
1270
1271 if (!options) {
1272 status = 1;
1273 goto bail;
1274 }
1275
1276 while ((p = strsep(&options, ",")) != NULL) {
1277 if (!*p)
1278 continue;
1279
1280 token = match_token(p, tokens, args);
1281 switch (token) {
1282 case Opt_hb_local:
1283 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1284 break;
1285 case Opt_hb_none:
1286 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1287 break;
1288 case Opt_hb_global:
1289 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1290 break;
1291 case Opt_barrier:
1292 if (match_int(&args[0], &option)) {
1293 status = 0;
1294 goto bail;
1295 }
1296 if (option)
1297 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1298 else
1299 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1300 break;
1301 case Opt_intr:
1302 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1303 break;
1304 case Opt_nointr:
1305 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1306 break;
1307 case Opt_err_panic:
1308 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1309 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1310 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1311 break;
1312 case Opt_err_ro:
1313 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1314 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1315 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1316 break;
1317 case Opt_err_cont:
1318 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1319 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1320 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1321 break;
1322 case Opt_data_ordered:
1323 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1324 break;
1325 case Opt_data_writeback:
1326 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1327 break;
1328 case Opt_user_xattr:
1329 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1330 break;
1331 case Opt_nouser_xattr:
1332 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1333 break;
1334 case Opt_atime_quantum:
1335 if (match_int(&args[0], &option)) {
1336 status = 0;
1337 goto bail;
1338 }
1339 if (option >= 0)
1340 mopt->atime_quantum = option;
1341 break;
1342 case Opt_slot:
1343 if (match_int(&args[0], &option)) {
1344 status = 0;
1345 goto bail;
1346 }
1347 if (option)
1348 mopt->slot = (u16)option;
1349 break;
1350 case Opt_commit:
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option < 0)
1356 return 0;
1357 if (option == 0)
1358 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1359 mopt->commit_interval = HZ * option;
1360 break;
1361 case Opt_localalloc:
1362 if (match_int(&args[0], &option)) {
1363 status = 0;
1364 goto bail;
1365 }
1366 if (option >= 0)
1367 mopt->localalloc_opt = option;
1368 break;
1369 case Opt_localflocks:
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380 if (!is_remount)
1381 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1382 break;
1383 case Opt_stack:
1384
1385
1386
1387
1388 if (((args[0].to - args[0].from) !=
1389 OCFS2_STACK_LABEL_LEN) ||
1390 (strnlen(args[0].from,
1391 OCFS2_STACK_LABEL_LEN) !=
1392 OCFS2_STACK_LABEL_LEN)) {
1393 mlog(ML_ERROR,
1394 "Invalid cluster_stack option\n");
1395 status = 0;
1396 goto bail;
1397 }
1398 memcpy(mopt->cluster_stack, args[0].from,
1399 OCFS2_STACK_LABEL_LEN);
1400 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1401
1402
1403
1404
1405
1406 if (memcmp(mopt->cluster_stack,
1407 OCFS2_CLASSIC_CLUSTER_STACK,
1408 OCFS2_STACK_LABEL_LEN))
1409 user_stack = 1;
1410 break;
1411 case Opt_inode64:
1412 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1413 break;
1414 case Opt_usrquota:
1415 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1416 break;
1417 case Opt_grpquota:
1418 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1419 break;
1420 case Opt_coherency_buffered:
1421 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1422 break;
1423 case Opt_coherency_full:
1424 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1425 break;
1426 case Opt_acl:
1427 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1428 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1429 break;
1430 case Opt_noacl:
1431 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1432 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1433 break;
1434 case Opt_resv_level:
1435 if (is_remount)
1436 break;
1437 if (match_int(&args[0], &option)) {
1438 status = 0;
1439 goto bail;
1440 }
1441 if (option >= OCFS2_MIN_RESV_LEVEL &&
1442 option < OCFS2_MAX_RESV_LEVEL)
1443 mopt->resv_level = option;
1444 break;
1445 case Opt_dir_resv_level:
1446 if (is_remount)
1447 break;
1448 if (match_int(&args[0], &option)) {
1449 status = 0;
1450 goto bail;
1451 }
1452 if (option >= OCFS2_MIN_RESV_LEVEL &&
1453 option < OCFS2_MAX_RESV_LEVEL)
1454 mopt->dir_resv_level = option;
1455 break;
1456 case Opt_journal_async_commit:
1457 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1458 break;
1459 case Opt_nocluster:
1460 mopt->mount_opt |= OCFS2_MOUNT_NOCLUSTER;
1461 break;
1462 default:
1463 mlog(ML_ERROR,
1464 "Unrecognized mount option \"%s\" "
1465 "or missing value\n", p);
1466 status = 0;
1467 goto bail;
1468 }
1469 }
1470
1471 if (user_stack == 0) {
1472
1473 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1474 OCFS2_MOUNT_HB_GLOBAL |
1475 OCFS2_MOUNT_HB_NONE);
1476 if (hweight32(tmp) != 1) {
1477 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1478 status = 0;
1479 goto bail;
1480 }
1481 }
1482
1483 status = 1;
1484
1485bail:
1486 return status;
1487}
1488
1489static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1490{
1491 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1492 unsigned long opts = osb->s_mount_opt;
1493 unsigned int local_alloc_megs;
1494
1495 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1496 seq_printf(s, ",_netdev");
1497 if (opts & OCFS2_MOUNT_HB_LOCAL)
1498 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1499 else
1500 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1501 } else
1502 seq_printf(s, ",%s", OCFS2_HB_NONE);
1503
1504 if (opts & OCFS2_MOUNT_NOINTR)
1505 seq_printf(s, ",nointr");
1506
1507 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1508 seq_printf(s, ",data=writeback");
1509 else
1510 seq_printf(s, ",data=ordered");
1511
1512 if (opts & OCFS2_MOUNT_BARRIER)
1513 seq_printf(s, ",barrier=1");
1514
1515 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1516 seq_printf(s, ",errors=panic");
1517 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1518 seq_printf(s, ",errors=continue");
1519 else
1520 seq_printf(s, ",errors=remount-ro");
1521
1522 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1523 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1524
1525 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1526
1527 if (osb->osb_commit_interval)
1528 seq_printf(s, ",commit=%u",
1529 (unsigned) (osb->osb_commit_interval / HZ));
1530
1531 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1532 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1533 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1534
1535 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1536 seq_printf(s, ",localflocks,");
1537
1538 if (osb->osb_cluster_stack[0])
1539 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1540 OCFS2_STACK_LABEL_LEN);
1541 if (opts & OCFS2_MOUNT_USRQUOTA)
1542 seq_printf(s, ",usrquota");
1543 if (opts & OCFS2_MOUNT_GRPQUOTA)
1544 seq_printf(s, ",grpquota");
1545
1546 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1547 seq_printf(s, ",coherency=buffered");
1548 else
1549 seq_printf(s, ",coherency=full");
1550
1551 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1552 seq_printf(s, ",nouser_xattr");
1553 else
1554 seq_printf(s, ",user_xattr");
1555
1556 if (opts & OCFS2_MOUNT_INODE64)
1557 seq_printf(s, ",inode64");
1558
1559 if (opts & OCFS2_MOUNT_POSIX_ACL)
1560 seq_printf(s, ",acl");
1561 else
1562 seq_printf(s, ",noacl");
1563
1564 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1565 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1566
1567 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1568 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1569
1570 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1571 seq_printf(s, ",journal_async_commit");
1572
1573 if (opts & OCFS2_MOUNT_NOCLUSTER)
1574 seq_printf(s, ",nocluster");
1575
1576 return 0;
1577}
1578
1579static int __init ocfs2_init(void)
1580{
1581 int status;
1582
1583 status = init_ocfs2_uptodate_cache();
1584 if (status < 0)
1585 goto out1;
1586
1587 status = ocfs2_initialize_mem_caches();
1588 if (status < 0)
1589 goto out2;
1590
1591 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1592
1593 ocfs2_set_locking_protocol();
1594
1595 status = register_quota_format(&ocfs2_quota_format);
1596 if (status < 0)
1597 goto out3;
1598 status = register_filesystem(&ocfs2_fs_type);
1599 if (!status)
1600 return 0;
1601
1602 unregister_quota_format(&ocfs2_quota_format);
1603out3:
1604 debugfs_remove(ocfs2_debugfs_root);
1605 ocfs2_free_mem_caches();
1606out2:
1607 exit_ocfs2_uptodate_cache();
1608out1:
1609 mlog_errno(status);
1610 return status;
1611}
1612
1613static void __exit ocfs2_exit(void)
1614{
1615 unregister_quota_format(&ocfs2_quota_format);
1616
1617 debugfs_remove(ocfs2_debugfs_root);
1618
1619 ocfs2_free_mem_caches();
1620
1621 unregister_filesystem(&ocfs2_fs_type);
1622
1623 exit_ocfs2_uptodate_cache();
1624}
1625
1626static void ocfs2_put_super(struct super_block *sb)
1627{
1628 trace_ocfs2_put_super(sb);
1629
1630 ocfs2_sync_blockdev(sb);
1631 ocfs2_dismount_volume(sb, 0);
1632}
1633
1634static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1635{
1636 struct ocfs2_super *osb;
1637 u32 numbits, freebits;
1638 int status;
1639 struct ocfs2_dinode *bm_lock;
1640 struct buffer_head *bh = NULL;
1641 struct inode *inode = NULL;
1642
1643 trace_ocfs2_statfs(dentry->d_sb, buf);
1644
1645 osb = OCFS2_SB(dentry->d_sb);
1646
1647 inode = ocfs2_get_system_file_inode(osb,
1648 GLOBAL_BITMAP_SYSTEM_INODE,
1649 OCFS2_INVALID_SLOT);
1650 if (!inode) {
1651 mlog(ML_ERROR, "failed to get bitmap inode\n");
1652 status = -EIO;
1653 goto bail;
1654 }
1655
1656 status = ocfs2_inode_lock(inode, &bh, 0);
1657 if (status < 0) {
1658 mlog_errno(status);
1659 goto bail;
1660 }
1661
1662 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1663
1664 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1665 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1666
1667 buf->f_type = OCFS2_SUPER_MAGIC;
1668 buf->f_bsize = dentry->d_sb->s_blocksize;
1669 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1670 buf->f_blocks = ((sector_t) numbits) *
1671 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1672 buf->f_bfree = ((sector_t) freebits) *
1673 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1674 buf->f_bavail = buf->f_bfree;
1675 buf->f_files = numbits;
1676 buf->f_ffree = freebits;
1677 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1678 & 0xFFFFFFFFUL;
1679 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1680 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1681
1682 brelse(bh);
1683
1684 ocfs2_inode_unlock(inode, 0);
1685 status = 0;
1686bail:
1687 iput(inode);
1688
1689 if (status)
1690 mlog_errno(status);
1691
1692 return status;
1693}
1694
1695static void ocfs2_inode_init_once(void *data)
1696{
1697 struct ocfs2_inode_info *oi = data;
1698
1699 oi->ip_flags = 0;
1700 oi->ip_open_count = 0;
1701 spin_lock_init(&oi->ip_lock);
1702 ocfs2_extent_map_init(&oi->vfs_inode);
1703 INIT_LIST_HEAD(&oi->ip_io_markers);
1704 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1705 oi->ip_dir_start_lookup = 0;
1706 init_rwsem(&oi->ip_alloc_sem);
1707 init_rwsem(&oi->ip_xattr_sem);
1708 mutex_init(&oi->ip_io_mutex);
1709
1710 oi->ip_blkno = 0ULL;
1711 oi->ip_clusters = 0;
1712 oi->ip_next_orphan = NULL;
1713
1714 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1715
1716 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1717 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1718 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1719
1720 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1721 &ocfs2_inode_caching_ops);
1722
1723 inode_init_once(&oi->vfs_inode);
1724}
1725
1726static int ocfs2_initialize_mem_caches(void)
1727{
1728 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1729 sizeof(struct ocfs2_inode_info),
1730 0,
1731 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1732 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1733 ocfs2_inode_init_once);
1734 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1735 sizeof(struct ocfs2_dquot),
1736 0,
1737 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1738 SLAB_MEM_SPREAD),
1739 NULL);
1740 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1741 sizeof(struct ocfs2_quota_chunk),
1742 0,
1743 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1744 NULL);
1745 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1746 !ocfs2_qf_chunk_cachep) {
1747 kmem_cache_destroy(ocfs2_inode_cachep);
1748 kmem_cache_destroy(ocfs2_dquot_cachep);
1749 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1750 return -ENOMEM;
1751 }
1752
1753 return 0;
1754}
1755
1756static void ocfs2_free_mem_caches(void)
1757{
1758
1759
1760
1761
1762 rcu_barrier();
1763 kmem_cache_destroy(ocfs2_inode_cachep);
1764 ocfs2_inode_cachep = NULL;
1765
1766 kmem_cache_destroy(ocfs2_dquot_cachep);
1767 ocfs2_dquot_cachep = NULL;
1768
1769 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1770 ocfs2_qf_chunk_cachep = NULL;
1771}
1772
1773static int ocfs2_get_sector(struct super_block *sb,
1774 struct buffer_head **bh,
1775 int block,
1776 int sect_size)
1777{
1778 if (!sb_set_blocksize(sb, sect_size)) {
1779 mlog(ML_ERROR, "unable to set blocksize\n");
1780 return -EIO;
1781 }
1782
1783 *bh = sb_getblk(sb, block);
1784 if (!*bh) {
1785 mlog_errno(-ENOMEM);
1786 return -ENOMEM;
1787 }
1788 lock_buffer(*bh);
1789 if (!buffer_dirty(*bh))
1790 clear_buffer_uptodate(*bh);
1791 unlock_buffer(*bh);
1792 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1793 wait_on_buffer(*bh);
1794 if (!buffer_uptodate(*bh)) {
1795 mlog_errno(-EIO);
1796 brelse(*bh);
1797 *bh = NULL;
1798 return -EIO;
1799 }
1800
1801 return 0;
1802}
1803
1804static int ocfs2_mount_volume(struct super_block *sb)
1805{
1806 int status = 0;
1807 int unlock_super = 0;
1808 struct ocfs2_super *osb = OCFS2_SB(sb);
1809
1810 if (ocfs2_is_hard_readonly(osb))
1811 goto leave;
1812
1813 mutex_init(&osb->obs_trim_fs_mutex);
1814
1815 status = ocfs2_dlm_init(osb);
1816 if (status < 0) {
1817 mlog_errno(status);
1818 if (status == -EBADR && ocfs2_userspace_stack(osb))
1819 mlog(ML_ERROR, "couldn't mount because cluster name on"
1820 " disk does not match the running cluster name.\n");
1821 goto leave;
1822 }
1823
1824 status = ocfs2_super_lock(osb, 1);
1825 if (status < 0) {
1826 mlog_errno(status);
1827 goto leave;
1828 }
1829 unlock_super = 1;
1830
1831
1832 status = ocfs2_find_slot(osb);
1833 if (status < 0) {
1834 mlog_errno(status);
1835 goto leave;
1836 }
1837
1838
1839 status = ocfs2_init_local_system_inodes(osb);
1840 if (status < 0) {
1841 mlog_errno(status);
1842 goto leave;
1843 }
1844
1845 status = ocfs2_check_volume(osb);
1846 if (status < 0) {
1847 mlog_errno(status);
1848 goto leave;
1849 }
1850
1851 status = ocfs2_truncate_log_init(osb);
1852 if (status < 0)
1853 mlog_errno(status);
1854
1855leave:
1856 if (unlock_super)
1857 ocfs2_super_unlock(osb, 1);
1858
1859 return status;
1860}
1861
1862static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1863{
1864 int tmp, hangup_needed = 0;
1865 struct ocfs2_super *osb = NULL;
1866 char nodestr[12];
1867
1868 trace_ocfs2_dismount_volume(sb);
1869
1870 BUG_ON(!sb);
1871 osb = OCFS2_SB(sb);
1872 BUG_ON(!osb);
1873
1874
1875
1876 ocfs2_filecheck_remove_sysfs(osb);
1877
1878 kset_unregister(osb->osb_dev_kset);
1879
1880
1881 ocfs2_orphan_scan_stop(osb);
1882
1883 ocfs2_disable_quotas(osb);
1884
1885
1886 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1887
1888 cancel_work_sync(&osb->dquot_drop_work);
1889
1890 ocfs2_shutdown_local_alloc(osb);
1891
1892 ocfs2_truncate_log_shutdown(osb);
1893
1894
1895 ocfs2_recovery_exit(osb);
1896
1897 ocfs2_journal_shutdown(osb);
1898
1899 ocfs2_sync_blockdev(sb);
1900
1901 ocfs2_purge_refcount_trees(osb);
1902
1903
1904
1905 if (osb->cconn) {
1906 tmp = ocfs2_super_lock(osb, 1);
1907 if (tmp < 0) {
1908 mlog_errno(tmp);
1909 return;
1910 }
1911 }
1912
1913 if (osb->slot_num != OCFS2_INVALID_SLOT)
1914 ocfs2_put_slot(osb);
1915
1916 if (osb->cconn)
1917 ocfs2_super_unlock(osb, 1);
1918
1919 ocfs2_release_system_inodes(osb);
1920
1921
1922
1923
1924
1925
1926
1927 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1928 !ocfs2_is_hard_readonly(osb))
1929 hangup_needed = 1;
1930
1931 if (osb->cconn)
1932 ocfs2_dlm_shutdown(osb, hangup_needed);
1933
1934 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1935 debugfs_remove_recursive(osb->osb_debug_root);
1936
1937 if (hangup_needed)
1938 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1939
1940 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1941
1942 if (ocfs2_mount_local(osb))
1943 snprintf(nodestr, sizeof(nodestr), "local");
1944 else
1945 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1946
1947 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1948 osb->dev_str, nodestr);
1949
1950 ocfs2_delete_osb(osb);
1951 kfree(osb);
1952 sb->s_dev = 0;
1953 sb->s_fs_info = NULL;
1954}
1955
1956static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1957 unsigned uuid_bytes)
1958{
1959 int i, ret;
1960 char *ptr;
1961
1962 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1963
1964 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1965 if (osb->uuid_str == NULL)
1966 return -ENOMEM;
1967
1968 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1969
1970 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1971 if (ret != 2)
1972 return -EINVAL;
1973
1974 ptr += 2;
1975 }
1976
1977 return 0;
1978}
1979
1980
1981
1982
1983static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1984{
1985 int status = 0;
1986 u64 max_block =
1987 ocfs2_clusters_to_blocks(osb->sb,
1988 osb->osb_clusters_at_boot) - 1;
1989
1990
1991 if (max_block <= (u32)~0ULL)
1992 goto out;
1993
1994
1995
1996 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1997 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1998 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1999 JBD2_FEATURE_INCOMPAT_64BIT))) {
2000 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2001 "Enable the 'block64' journal option with tunefs.ocfs2");
2002 status = -EFBIG;
2003 goto out;
2004 }
2005
2006 out:
2007 return status;
2008}
2009
2010static int ocfs2_initialize_super(struct super_block *sb,
2011 struct buffer_head *bh,
2012 int sector_size,
2013 struct ocfs2_blockcheck_stats *stats)
2014{
2015 int status;
2016 int i, cbits, bbits;
2017 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2018 struct inode *inode = NULL;
2019 struct ocfs2_journal *journal;
2020 struct ocfs2_super *osb;
2021 u64 total_blocks;
2022
2023 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2024 if (!osb) {
2025 status = -ENOMEM;
2026 mlog_errno(status);
2027 goto bail;
2028 }
2029
2030 sb->s_fs_info = osb;
2031 sb->s_op = &ocfs2_sops;
2032 sb->s_d_op = &ocfs2_dentry_ops;
2033 sb->s_export_op = &ocfs2_export_ops;
2034 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2035 sb->dq_op = &ocfs2_quota_operations;
2036 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2037 sb->s_xattr = ocfs2_xattr_handlers;
2038 sb->s_time_gran = 1;
2039 sb->s_flags |= SB_NOATIME;
2040
2041 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2042 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2043 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2044 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2045 sizeof(di->id2.i_super.s_uuid));
2046
2047 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2048
2049 for (i = 0; i < 3; i++)
2050 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2051 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2052
2053 osb->sb = sb;
2054 osb->s_sectsize_bits = blksize_bits(sector_size);
2055 BUG_ON(!osb->s_sectsize_bits);
2056
2057 spin_lock_init(&osb->dc_task_lock);
2058 init_waitqueue_head(&osb->dc_event);
2059 osb->dc_work_sequence = 0;
2060 osb->dc_wake_sequence = 0;
2061 INIT_LIST_HEAD(&osb->blocked_lock_list);
2062 osb->blocked_lock_count = 0;
2063 spin_lock_init(&osb->osb_lock);
2064 spin_lock_init(&osb->osb_xattr_lock);
2065 ocfs2_init_steal_slots(osb);
2066
2067 mutex_init(&osb->system_file_mutex);
2068
2069 atomic_set(&osb->alloc_stats.moves, 0);
2070 atomic_set(&osb->alloc_stats.local_data, 0);
2071 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2072 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2073 atomic_set(&osb->alloc_stats.bg_extends, 0);
2074
2075
2076 osb->osb_ecc_stats = *stats;
2077
2078 ocfs2_init_node_maps(osb);
2079
2080 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2081 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2082
2083 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2084 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2085 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2086 osb->max_slots);
2087 status = -EINVAL;
2088 goto bail;
2089 }
2090
2091 ocfs2_orphan_scan_init(osb);
2092
2093 status = ocfs2_recovery_init(osb);
2094 if (status) {
2095 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2096 mlog_errno(status);
2097 goto bail;
2098 }
2099
2100 init_waitqueue_head(&osb->checkpoint_event);
2101
2102 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2103
2104 osb->slot_num = OCFS2_INVALID_SLOT;
2105
2106 osb->s_xattr_inline_size = le16_to_cpu(
2107 di->id2.i_super.s_xattr_inline_size);
2108
2109 osb->local_alloc_state = OCFS2_LA_UNUSED;
2110 osb->local_alloc_bh = NULL;
2111 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2112
2113 init_waitqueue_head(&osb->osb_mount_event);
2114
2115 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2116 if (status) {
2117 mlog_errno(status);
2118 goto bail;
2119 }
2120
2121 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2122 if (!osb->vol_label) {
2123 mlog(ML_ERROR, "unable to alloc vol label\n");
2124 status = -ENOMEM;
2125 goto bail;
2126 }
2127
2128 osb->slot_recovery_generations =
2129 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2130 GFP_KERNEL);
2131 if (!osb->slot_recovery_generations) {
2132 status = -ENOMEM;
2133 mlog_errno(status);
2134 goto bail;
2135 }
2136
2137 init_waitqueue_head(&osb->osb_wipe_event);
2138 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2139 sizeof(*osb->osb_orphan_wipes),
2140 GFP_KERNEL);
2141 if (!osb->osb_orphan_wipes) {
2142 status = -ENOMEM;
2143 mlog_errno(status);
2144 goto bail;
2145 }
2146
2147 osb->osb_rf_lock_tree = RB_ROOT;
2148
2149 osb->s_feature_compat =
2150 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2151 osb->s_feature_ro_compat =
2152 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2153 osb->s_feature_incompat =
2154 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2155
2156 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2157 mlog(ML_ERROR, "couldn't mount because of unsupported "
2158 "optional features (%x).\n", i);
2159 status = -EINVAL;
2160 goto bail;
2161 }
2162 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2163 mlog(ML_ERROR, "couldn't mount RDWR because of "
2164 "unsupported optional features (%x).\n", i);
2165 status = -EINVAL;
2166 goto bail;
2167 }
2168
2169 if (ocfs2_clusterinfo_valid(osb)) {
2170
2171
2172
2173
2174
2175
2176 osb->osb_stackflags =
2177 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2178 memcpy(osb->osb_cluster_stack,
2179 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2180 OCFS2_STACK_LABEL_LEN);
2181 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2182 mlog(ML_ERROR,
2183 "couldn't mount because of an invalid "
2184 "cluster stack label (%s) \n",
2185 osb->osb_cluster_stack);
2186 status = -EINVAL;
2187 goto bail;
2188 }
2189 memcpy(osb->osb_cluster_name,
2190 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2191 OCFS2_CLUSTER_NAME_LEN);
2192 } else {
2193
2194
2195 osb->osb_cluster_stack[0] = '\0';
2196 }
2197
2198 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2210 if (!journal) {
2211 mlog(ML_ERROR, "unable to alloc journal\n");
2212 status = -ENOMEM;
2213 goto bail;
2214 }
2215 osb->journal = journal;
2216 journal->j_osb = osb;
2217
2218 atomic_set(&journal->j_num_trans, 0);
2219 init_rwsem(&journal->j_trans_barrier);
2220 init_waitqueue_head(&journal->j_checkpointed);
2221 spin_lock_init(&journal->j_lock);
2222 journal->j_trans_id = (unsigned long) 1;
2223 INIT_LIST_HEAD(&journal->j_la_cleanups);
2224 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2225 journal->j_state = OCFS2_JOURNAL_FREE;
2226
2227 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2228 init_llist_head(&osb->dquot_drop_list);
2229
2230
2231 osb->s_clustersize_bits =
2232 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2233 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2234
2235 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2236 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2237 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2238 osb->s_clustersize);
2239 status = -EINVAL;
2240 goto bail;
2241 }
2242
2243 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2244 le32_to_cpu(di->i_clusters));
2245
2246 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2247 total_blocks);
2248 if (status) {
2249 mlog(ML_ERROR, "Volume too large "
2250 "to mount safely on this system");
2251 status = -EFBIG;
2252 goto bail;
2253 }
2254
2255 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2256 sizeof(di->id2.i_super.s_uuid))) {
2257 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2258 status = -ENOMEM;
2259 goto bail;
2260 }
2261
2262 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2263 OCFS2_MAX_VOL_LABEL_LEN);
2264 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2265 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2266 osb->first_cluster_group_blkno =
2267 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2268 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2269 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2270 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2271 (unsigned long long)osb->root_blkno,
2272 (unsigned long long)osb->system_dir_blkno,
2273 osb->s_clustersize_bits);
2274
2275 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2276 if (!osb->osb_dlm_debug) {
2277 status = -ENOMEM;
2278 mlog_errno(status);
2279 goto bail;
2280 }
2281
2282 atomic_set(&osb->vol_state, VOLUME_INIT);
2283
2284
2285 status = ocfs2_init_global_system_inodes(osb);
2286 if (status < 0) {
2287 mlog_errno(status);
2288 goto bail;
2289 }
2290
2291
2292
2293
2294 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2295 OCFS2_INVALID_SLOT);
2296 if (!inode) {
2297 status = -EINVAL;
2298 mlog_errno(status);
2299 goto bail;
2300 }
2301
2302 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2303 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2304 iput(inode);
2305
2306 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2307 osb->s_feature_incompat) * 8;
2308
2309 status = ocfs2_init_slot_info(osb);
2310 if (status < 0) {
2311 mlog_errno(status);
2312 goto bail;
2313 }
2314 cleancache_init_shared_fs(sb);
2315
2316 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2317 if (!osb->ocfs2_wq) {
2318 status = -ENOMEM;
2319 mlog_errno(status);
2320 }
2321
2322bail:
2323 return status;
2324}
2325
2326
2327
2328
2329
2330
2331static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2332 struct buffer_head *bh,
2333 u32 blksz,
2334 struct ocfs2_blockcheck_stats *stats)
2335{
2336 int status = -EAGAIN;
2337
2338 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2339 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2340
2341 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2342 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2343 status = ocfs2_block_check_validate(bh->b_data,
2344 bh->b_size,
2345 &di->i_check,
2346 stats);
2347 if (status)
2348 goto out;
2349 }
2350 status = -EINVAL;
2351 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2352 mlog(ML_ERROR, "found superblock with incorrect block "
2353 "size: found %u, should be %u\n",
2354 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2355 blksz);
2356 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2357 OCFS2_MAJOR_REV_LEVEL ||
2358 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2359 OCFS2_MINOR_REV_LEVEL) {
2360 mlog(ML_ERROR, "found superblock with bad version: "
2361 "found %u.%u, should be %u.%u\n",
2362 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2363 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2364 OCFS2_MAJOR_REV_LEVEL,
2365 OCFS2_MINOR_REV_LEVEL);
2366 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2367 mlog(ML_ERROR, "bad block number on superblock: "
2368 "found %llu, should be %llu\n",
2369 (unsigned long long)le64_to_cpu(di->i_blkno),
2370 (unsigned long long)bh->b_blocknr);
2371 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2372 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2373 mlog(ML_ERROR, "bad cluster size found: %u\n",
2374 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2375 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2376 mlog(ML_ERROR, "bad root_blkno: 0\n");
2377 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2378 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2379 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2380 mlog(ML_ERROR,
2381 "Superblock slots found greater than file system "
2382 "maximum: found %u, max %u\n",
2383 le16_to_cpu(di->id2.i_super.s_max_slots),
2384 OCFS2_MAX_SLOTS);
2385 } else {
2386
2387 status = 0;
2388 }
2389 }
2390
2391out:
2392 if (status && status != -EAGAIN)
2393 mlog_errno(status);
2394 return status;
2395}
2396
2397static int ocfs2_check_volume(struct ocfs2_super *osb)
2398{
2399 int status;
2400 int dirty;
2401 int local;
2402 struct ocfs2_dinode *local_alloc = NULL;
2403
2404
2405
2406
2407 status = ocfs2_journal_init(osb->journal, &dirty);
2408 if (status < 0) {
2409 mlog(ML_ERROR, "Could not initialize journal!\n");
2410 goto finally;
2411 }
2412
2413
2414
2415 status = ocfs2_journal_addressable(osb);
2416 if (status)
2417 goto finally;
2418
2419
2420
2421
2422 if (!dirty) {
2423 status = ocfs2_journal_wipe(osb->journal, 0);
2424 if (status < 0) {
2425 mlog_errno(status);
2426 goto finally;
2427 }
2428 } else {
2429 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2430 "unmounted cleanly, recovering it.\n", osb->dev_str);
2431 }
2432
2433 local = ocfs2_mount_local(osb);
2434
2435
2436 status = ocfs2_journal_load(osb->journal, local, dirty);
2437 if (status < 0) {
2438 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2439 goto finally;
2440 }
2441
2442 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2443 jbd2_journal_set_features(osb->journal->j_journal,
2444 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2445 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2446 else
2447 jbd2_journal_clear_features(osb->journal->j_journal,
2448 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2449 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2450
2451 if (dirty) {
2452
2453 status = ocfs2_begin_local_alloc_recovery(osb,
2454 osb->slot_num,
2455 &local_alloc);
2456 if (status < 0) {
2457 mlog_errno(status);
2458 goto finally;
2459 }
2460
2461
2462 }
2463
2464 status = ocfs2_load_local_alloc(osb);
2465 if (status < 0) {
2466 mlog_errno(status);
2467 goto finally;
2468 }
2469
2470 if (dirty) {
2471
2472
2473 osb->local_alloc_copy = local_alloc;
2474 local_alloc = NULL;
2475 }
2476
2477
2478
2479
2480 status = ocfs2_mark_dead_nodes(osb);
2481 if (status < 0) {
2482 mlog_errno(status);
2483 goto finally;
2484 }
2485
2486 status = ocfs2_compute_replay_slots(osb);
2487 if (status < 0)
2488 mlog_errno(status);
2489
2490finally:
2491 kfree(local_alloc);
2492
2493 if (status)
2494 mlog_errno(status);
2495 return status;
2496}
2497
2498
2499
2500
2501
2502
2503
2504static void ocfs2_delete_osb(struct ocfs2_super *osb)
2505{
2506
2507
2508
2509 if (osb->ocfs2_wq)
2510 destroy_workqueue(osb->ocfs2_wq);
2511
2512 ocfs2_free_slot_info(osb);
2513
2514 kfree(osb->osb_orphan_wipes);
2515 kfree(osb->slot_recovery_generations);
2516
2517
2518
2519
2520
2521 kfree(osb->journal);
2522 kfree(osb->local_alloc_copy);
2523 kfree(osb->uuid_str);
2524 kfree(osb->vol_label);
2525 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2526 memset(osb, 0, sizeof(struct ocfs2_super));
2527}
2528
2529
2530
2531
2532
2533
2534
2535static int ocfs2_handle_error(struct super_block *sb)
2536{
2537 struct ocfs2_super *osb = OCFS2_SB(sb);
2538 int rv = 0;
2539
2540 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2541 pr_crit("On-disk corruption discovered. "
2542 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2543
2544 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2545 panic("OCFS2: (device %s): panic forced after error\n",
2546 sb->s_id);
2547 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2548 pr_crit("OCFS2: Returning error to the calling process.\n");
2549 rv = -EIO;
2550 } else {
2551 rv = -EROFS;
2552 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2553 return rv;
2554
2555 pr_crit("OCFS2: File system is now read-only.\n");
2556 sb->s_flags |= SB_RDONLY;
2557 ocfs2_set_ro_flag(osb, 0);
2558 }
2559
2560 return rv;
2561}
2562
2563int __ocfs2_error(struct super_block *sb, const char *function,
2564 const char *fmt, ...)
2565{
2566 struct va_format vaf;
2567 va_list args;
2568
2569 va_start(args, fmt);
2570 vaf.fmt = fmt;
2571 vaf.va = &args;
2572
2573
2574
2575 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2576 sb->s_id, function, &vaf);
2577
2578 va_end(args);
2579
2580 return ocfs2_handle_error(sb);
2581}
2582
2583
2584
2585
2586void __ocfs2_abort(struct super_block *sb, const char *function,
2587 const char *fmt, ...)
2588{
2589 struct va_format vaf;
2590 va_list args;
2591
2592 va_start(args, fmt);
2593
2594 vaf.fmt = fmt;
2595 vaf.va = &args;
2596
2597 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2598 sb->s_id, function, &vaf);
2599
2600 va_end(args);
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2614 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2615 ocfs2_handle_error(sb);
2616}
2617
2618
2619
2620
2621
2622void ocfs2_block_signals(sigset_t *oldset)
2623{
2624 int rc;
2625 sigset_t blocked;
2626
2627 sigfillset(&blocked);
2628 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2629 BUG_ON(rc);
2630}
2631
2632void ocfs2_unblock_signals(sigset_t *oldset)
2633{
2634 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2635 BUG_ON(rc);
2636}
2637
2638module_init(ocfs2_init);
2639module_exit(ocfs2_exit);
2640
