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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 signed short slot;
82 int localalloc_opt;
83 unsigned int resv_level;
84 int dir_resv_level;
85 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
86};
87
88static int ocfs2_parse_options(struct super_block *sb, char *options,
89 struct mount_options *mopt,
90 int is_remount);
91static int ocfs2_check_set_options(struct super_block *sb,
92 struct mount_options *options);
93static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
94static void ocfs2_put_super(struct super_block *sb);
95static int ocfs2_mount_volume(struct super_block *sb);
96static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
97static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
98static int ocfs2_initialize_mem_caches(void);
99static void ocfs2_free_mem_caches(void);
100static void ocfs2_delete_osb(struct ocfs2_super *osb);
101
102static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
103
104static int ocfs2_sync_fs(struct super_block *sb, int wait);
105
106static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
107static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
108static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
109static int ocfs2_check_volume(struct ocfs2_super *osb);
110static int ocfs2_verify_volume(struct ocfs2_dinode *di,
111 struct buffer_head *bh,
112 u32 sectsize,
113 struct ocfs2_blockcheck_stats *stats);
114static int ocfs2_initialize_super(struct super_block *sb,
115 struct buffer_head *bh,
116 int sector_size,
117 struct ocfs2_blockcheck_stats *stats);
118static int ocfs2_get_sector(struct super_block *sb,
119 struct buffer_head **bh,
120 int block,
121 int sect_size);
122static struct inode *ocfs2_alloc_inode(struct super_block *sb);
123static void ocfs2_free_inode(struct inode *inode);
124static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
125static int ocfs2_enable_quotas(struct ocfs2_super *osb);
126static void ocfs2_disable_quotas(struct ocfs2_super *osb);
127
128static struct dquot **ocfs2_get_dquots(struct inode *inode)
129{
130 return OCFS2_I(inode)->i_dquot;
131}
132
133static const struct super_operations ocfs2_sops = {
134 .statfs = ocfs2_statfs,
135 .alloc_inode = ocfs2_alloc_inode,
136 .free_inode = ocfs2_free_inode,
137 .drop_inode = ocfs2_drop_inode,
138 .evict_inode = ocfs2_evict_inode,
139 .sync_fs = ocfs2_sync_fs,
140 .put_super = ocfs2_put_super,
141 .remount_fs = ocfs2_remount,
142 .show_options = ocfs2_show_options,
143 .quota_read = ocfs2_quota_read,
144 .quota_write = ocfs2_quota_write,
145 .get_dquots = ocfs2_get_dquots,
146};
147
148enum {
149 Opt_barrier,
150 Opt_err_panic,
151 Opt_err_ro,
152 Opt_intr,
153 Opt_nointr,
154 Opt_hb_none,
155 Opt_hb_local,
156 Opt_hb_global,
157 Opt_data_ordered,
158 Opt_data_writeback,
159 Opt_atime_quantum,
160 Opt_slot,
161 Opt_commit,
162 Opt_localalloc,
163 Opt_localflocks,
164 Opt_stack,
165 Opt_user_xattr,
166 Opt_nouser_xattr,
167 Opt_inode64,
168 Opt_acl,
169 Opt_noacl,
170 Opt_usrquota,
171 Opt_grpquota,
172 Opt_coherency_buffered,
173 Opt_coherency_full,
174 Opt_resv_level,
175 Opt_dir_resv_level,
176 Opt_journal_async_commit,
177 Opt_err_cont,
178 Opt_err,
179};
180
181static const match_table_t tokens = {
182 {Opt_barrier, "barrier=%u"},
183 {Opt_err_panic, "errors=panic"},
184 {Opt_err_ro, "errors=remount-ro"},
185 {Opt_intr, "intr"},
186 {Opt_nointr, "nointr"},
187 {Opt_hb_none, OCFS2_HB_NONE},
188 {Opt_hb_local, OCFS2_HB_LOCAL},
189 {Opt_hb_global, OCFS2_HB_GLOBAL},
190 {Opt_data_ordered, "data=ordered"},
191 {Opt_data_writeback, "data=writeback"},
192 {Opt_atime_quantum, "atime_quantum=%u"},
193 {Opt_slot, "preferred_slot=%u"},
194 {Opt_commit, "commit=%u"},
195 {Opt_localalloc, "localalloc=%d"},
196 {Opt_localflocks, "localflocks"},
197 {Opt_stack, "cluster_stack=%s"},
198 {Opt_user_xattr, "user_xattr"},
199 {Opt_nouser_xattr, "nouser_xattr"},
200 {Opt_inode64, "inode64"},
201 {Opt_acl, "acl"},
202 {Opt_noacl, "noacl"},
203 {Opt_usrquota, "usrquota"},
204 {Opt_grpquota, "grpquota"},
205 {Opt_coherency_buffered, "coherency=buffered"},
206 {Opt_coherency_full, "coherency=full"},
207 {Opt_resv_level, "resv_level=%u"},
208 {Opt_dir_resv_level, "dir_resv_level=%u"},
209 {Opt_journal_async_commit, "journal_async_commit"},
210 {Opt_err_cont, "errors=continue"},
211 {Opt_err, NULL}
212};
213
214#ifdef CONFIG_DEBUG_FS
215static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
216{
217 struct ocfs2_cluster_connection *cconn = osb->cconn;
218 struct ocfs2_recovery_map *rm = osb->recovery_map;
219 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
220 int i, out = 0;
221 unsigned long flags;
222
223 out += snprintf(buf + out, len - out,
224 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
225 "Device", osb->dev_str, osb->uuid_str,
226 osb->fs_generation, osb->vol_label);
227
228 out += snprintf(buf + out, len - out,
229 "%10s => State: %d Flags: 0x%lX\n", "Volume",
230 atomic_read(&osb->vol_state), osb->osb_flags);
231
232 out += snprintf(buf + out, len - out,
233 "%10s => Block: %lu Cluster: %d\n", "Sizes",
234 osb->sb->s_blocksize, osb->s_clustersize);
235
236 out += snprintf(buf + out, len - out,
237 "%10s => Compat: 0x%X Incompat: 0x%X "
238 "ROcompat: 0x%X\n",
239 "Features", osb->s_feature_compat,
240 osb->s_feature_incompat, osb->s_feature_ro_compat);
241
242 out += snprintf(buf + out, len - out,
243 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
244 osb->s_mount_opt, osb->s_atime_quantum);
245
246 if (cconn) {
247 out += snprintf(buf + out, len - out,
248 "%10s => Stack: %s Name: %*s "
249 "Version: %d.%d\n", "Cluster",
250 (*osb->osb_cluster_stack == '\0' ?
251 "o2cb" : osb->osb_cluster_stack),
252 cconn->cc_namelen, cconn->cc_name,
253 cconn->cc_version.pv_major,
254 cconn->cc_version.pv_minor);
255 }
256
257 spin_lock_irqsave(&osb->dc_task_lock, flags);
258 out += snprintf(buf + out, len - out,
259 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
260 "WorkSeq: %lu\n", "DownCnvt",
261 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
262 osb->blocked_lock_count, osb->dc_wake_sequence,
263 osb->dc_work_sequence);
264 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
265
266 spin_lock(&osb->osb_lock);
267 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
268 "Recovery",
269 (osb->recovery_thread_task ?
270 task_pid_nr(osb->recovery_thread_task) : -1));
271 if (rm->rm_used == 0)
272 out += snprintf(buf + out, len - out, " None\n");
273 else {
274 for (i = 0; i < rm->rm_used; i++)
275 out += snprintf(buf + out, len - out, " %d",
276 rm->rm_entries[i]);
277 out += snprintf(buf + out, len - out, "\n");
278 }
279 spin_unlock(&osb->osb_lock);
280
281 out += snprintf(buf + out, len - out,
282 "%10s => Pid: %d Interval: %lu\n", "Commit",
283 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
284 osb->osb_commit_interval);
285
286 out += snprintf(buf + out, len - out,
287 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
288 "Journal", osb->journal->j_state,
289 osb->journal->j_trans_id,
290 atomic_read(&osb->journal->j_num_trans));
291
292 out += snprintf(buf + out, len - out,
293 "%10s => GlobalAllocs: %d LocalAllocs: %d "
294 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
295 "Stats",
296 atomic_read(&osb->alloc_stats.bitmap_data),
297 atomic_read(&osb->alloc_stats.local_data),
298 atomic_read(&osb->alloc_stats.bg_allocs),
299 atomic_read(&osb->alloc_stats.moves),
300 atomic_read(&osb->alloc_stats.bg_extends));
301
302 out += snprintf(buf + out, len - out,
303 "%10s => State: %u Descriptor: %llu Size: %u bits "
304 "Default: %u bits\n",
305 "LocalAlloc", osb->local_alloc_state,
306 (unsigned long long)osb->la_last_gd,
307 osb->local_alloc_bits, osb->local_alloc_default_bits);
308
309 spin_lock(&osb->osb_lock);
310 out += snprintf(buf + out, len - out,
311 "%10s => InodeSlot: %d StolenInodes: %d, "
312 "MetaSlot: %d StolenMeta: %d\n", "Steal",
313 osb->s_inode_steal_slot,
314 atomic_read(&osb->s_num_inodes_stolen),
315 osb->s_meta_steal_slot,
316 atomic_read(&osb->s_num_meta_stolen));
317 spin_unlock(&osb->osb_lock);
318
319 out += snprintf(buf + out, len - out, "OrphanScan => ");
320 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
321 os->os_count, os->os_seqno);
322 out += snprintf(buf + out, len - out, " Last Scan: ");
323 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
324 out += snprintf(buf + out, len - out, "Disabled\n");
325 else
326 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
327 (unsigned long)(ktime_get_seconds() - os->os_scantime));
328
329 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
330 "Slots", "Num", "RecoGen");
331 for (i = 0; i < osb->max_slots; ++i) {
332 out += snprintf(buf + out, len - out,
333 "%10s %c %3d %10d\n",
334 " ",
335 (i == osb->slot_num ? '*' : ' '),
336 i, osb->slot_recovery_generations[i]);
337 }
338
339 return out;
340}
341
342static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
343{
344 struct ocfs2_super *osb = inode->i_private;
345 char *buf = NULL;
346
347 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
348 if (!buf)
349 goto bail;
350
351 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
352
353 file->private_data = buf;
354
355 return 0;
356bail:
357 return -ENOMEM;
358}
359
360static int ocfs2_debug_release(struct inode *inode, struct file *file)
361{
362 kfree(file->private_data);
363 return 0;
364}
365
366static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
367 size_t nbytes, loff_t *ppos)
368{
369 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
370 i_size_read(file->f_mapping->host));
371}
372#else
373static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
374{
375 return 0;
376}
377static int ocfs2_debug_release(struct inode *inode, struct file *file)
378{
379 return 0;
380}
381static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382 size_t nbytes, loff_t *ppos)
383{
384 return 0;
385}
386#endif
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_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
623 OCFS2_MOUNT_HB_NONE;
624 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
625 ret = -EINVAL;
626 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
627 goto out;
628 }
629
630 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
631 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
632 ret = -EINVAL;
633 mlog(ML_ERROR, "Cannot change data mode on remount\n");
634 goto out;
635 }
636
637
638
639 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
640 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
641 ret = -EINVAL;
642 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
643 goto out;
644 }
645
646
647 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
648
649 if (*flags & SB_RDONLY) {
650 ret = ocfs2_susp_quotas(osb, 0);
651 if (ret < 0)
652 goto out;
653 }
654
655
656 spin_lock(&osb->osb_lock);
657 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
658 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
659 ret = -EROFS;
660 goto unlock_osb;
661 }
662
663 if (*flags & SB_RDONLY) {
664 sb->s_flags |= SB_RDONLY;
665 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
666 } else {
667 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
668 mlog(ML_ERROR, "Cannot remount RDWR "
669 "filesystem due to previous errors.\n");
670 ret = -EROFS;
671 goto unlock_osb;
672 }
673 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
674 if (incompat_features) {
675 mlog(ML_ERROR, "Cannot remount RDWR because "
676 "of unsupported optional features "
677 "(%x).\n", incompat_features);
678 ret = -EINVAL;
679 goto unlock_osb;
680 }
681 sb->s_flags &= ~SB_RDONLY;
682 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
683 }
684 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
685unlock_osb:
686 spin_unlock(&osb->osb_lock);
687
688 if (!ret && !(*flags & SB_RDONLY)) {
689 if (sb_any_quota_suspended(sb))
690 ret = ocfs2_susp_quotas(osb, 1);
691 else
692 ret = ocfs2_enable_quotas(osb);
693 if (ret < 0) {
694
695 spin_lock(&osb->osb_lock);
696 sb->s_flags |= SB_RDONLY;
697 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
698 spin_unlock(&osb->osb_lock);
699 goto out;
700 }
701 }
702 }
703
704 if (!ret) {
705
706
707 osb->s_mount_opt = parsed_options.mount_opt;
708 osb->s_atime_quantum = parsed_options.atime_quantum;
709 osb->preferred_slot = parsed_options.slot;
710 if (parsed_options.commit_interval)
711 osb->osb_commit_interval = parsed_options.commit_interval;
712
713 if (!ocfs2_is_hard_readonly(osb))
714 ocfs2_set_journal_params(osb);
715
716 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
717 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
718 SB_POSIXACL : 0);
719 }
720out:
721 return ret;
722}
723
724static int ocfs2_sb_probe(struct super_block *sb,
725 struct buffer_head **bh,
726 int *sector_size,
727 struct ocfs2_blockcheck_stats *stats)
728{
729 int status, tmpstat;
730 struct ocfs1_vol_disk_hdr *hdr;
731 struct ocfs2_dinode *di;
732 int blksize;
733
734 *bh = NULL;
735
736
737 *sector_size = bdev_logical_block_size(sb->s_bdev);
738 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
739 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
740 *sector_size, OCFS2_MAX_BLOCKSIZE);
741 status = -EINVAL;
742 goto bail;
743 }
744
745
746 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
747 *sector_size = OCFS2_MIN_BLOCKSIZE;
748
749
750 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
751 if (status < 0) {
752 mlog_errno(status);
753 goto bail;
754 }
755 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
756 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
757 mlog(ML_ERROR, "incompatible version: %u.%u\n",
758 hdr->major_version, hdr->minor_version);
759 status = -EINVAL;
760 }
761 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
762 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
763 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
764 hdr->signature);
765 status = -EINVAL;
766 }
767 brelse(*bh);
768 *bh = NULL;
769 if (status < 0) {
770 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
771 "upgraded before mounting with ocfs v2\n");
772 goto bail;
773 }
774
775
776
777
778
779
780 status = -EINVAL;
781 for (blksize = *sector_size;
782 blksize <= OCFS2_MAX_BLOCKSIZE;
783 blksize <<= 1) {
784 tmpstat = ocfs2_get_sector(sb, bh,
785 OCFS2_SUPER_BLOCK_BLKNO,
786 blksize);
787 if (tmpstat < 0) {
788 status = tmpstat;
789 mlog_errno(status);
790 break;
791 }
792 di = (struct ocfs2_dinode *) (*bh)->b_data;
793 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
794 spin_lock_init(&stats->b_lock);
795 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
796 if (tmpstat < 0) {
797 brelse(*bh);
798 *bh = NULL;
799 }
800 if (tmpstat != -EAGAIN) {
801 status = tmpstat;
802 break;
803 }
804 }
805
806bail:
807 return status;
808}
809
810static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
811{
812 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
813
814 if (osb->s_mount_opt & hb_enabled) {
815 if (ocfs2_mount_local(osb)) {
816 mlog(ML_ERROR, "Cannot heartbeat on a locally "
817 "mounted device.\n");
818 return -EINVAL;
819 }
820 if (ocfs2_userspace_stack(osb)) {
821 mlog(ML_ERROR, "Userspace stack expected, but "
822 "o2cb heartbeat arguments passed to mount\n");
823 return -EINVAL;
824 }
825 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
826 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
827 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
828 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
829 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
830 return -EINVAL;
831 }
832 }
833
834 if (!(osb->s_mount_opt & hb_enabled)) {
835 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
836 !ocfs2_userspace_stack(osb)) {
837 mlog(ML_ERROR, "Heartbeat has to be started to mount "
838 "a read-write clustered device.\n");
839 return -EINVAL;
840 }
841 }
842
843 return 0;
844}
845
846
847
848
849
850
851static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
852 struct mount_options *mopt)
853{
854 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
855 mlog(ML_ERROR,
856 "cluster stack passed to mount, but this filesystem "
857 "does not support it\n");
858 return -EINVAL;
859 }
860
861 if (ocfs2_userspace_stack(osb) &&
862 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
863 OCFS2_STACK_LABEL_LEN)) {
864 mlog(ML_ERROR,
865 "cluster stack passed to mount (\"%s\") does not "
866 "match the filesystem (\"%s\")\n",
867 mopt->cluster_stack,
868 osb->osb_cluster_stack);
869 return -EINVAL;
870 }
871
872 return 0;
873}
874
875static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
876{
877 int type;
878 struct super_block *sb = osb->sb;
879 unsigned int feature[OCFS2_MAXQUOTAS] = {
880 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
881 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
882 int status = 0;
883
884 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
885 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
886 continue;
887 if (unsuspend)
888 status = dquot_resume(sb, type);
889 else {
890 struct ocfs2_mem_dqinfo *oinfo;
891
892
893 oinfo = sb_dqinfo(sb, type)->dqi_priv;
894 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
895 status = dquot_suspend(sb, type);
896 }
897 if (status < 0)
898 break;
899 }
900 if (status < 0)
901 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
902 "remount (error = %d).\n", status);
903 return status;
904}
905
906static int ocfs2_enable_quotas(struct ocfs2_super *osb)
907{
908 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
909 struct super_block *sb = osb->sb;
910 unsigned int feature[OCFS2_MAXQUOTAS] = {
911 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
912 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
913 unsigned int ino[OCFS2_MAXQUOTAS] = {
914 LOCAL_USER_QUOTA_SYSTEM_INODE,
915 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
916 int status;
917 int type;
918
919 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
920 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
921 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
922 continue;
923 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
924 osb->slot_num);
925 if (!inode[type]) {
926 status = -ENOENT;
927 goto out_quota_off;
928 }
929 status = dquot_enable(inode[type], type, QFMT_OCFS2,
930 DQUOT_USAGE_ENABLED);
931 if (status < 0)
932 goto out_quota_off;
933 }
934
935 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
936 iput(inode[type]);
937 return 0;
938out_quota_off:
939 ocfs2_disable_quotas(osb);
940 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
941 iput(inode[type]);
942 mlog_errno(status);
943 return status;
944}
945
946static void ocfs2_disable_quotas(struct ocfs2_super *osb)
947{
948 int type;
949 struct inode *inode;
950 struct super_block *sb = osb->sb;
951 struct ocfs2_mem_dqinfo *oinfo;
952
953
954
955 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
956 if (!sb_has_quota_loaded(sb, type))
957 continue;
958 oinfo = sb_dqinfo(sb, type)->dqi_priv;
959 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
960 inode = igrab(sb->s_dquot.files[type]);
961
962
963
964 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
965 DQUOT_LIMITS_ENABLED);
966 if (!inode)
967 continue;
968 iput(inode);
969 }
970}
971
972static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
973{
974 struct dentry *root;
975 int status, sector_size;
976 struct mount_options parsed_options;
977 struct inode *inode = NULL;
978 struct ocfs2_super *osb = NULL;
979 struct buffer_head *bh = NULL;
980 char nodestr[12];
981 struct ocfs2_blockcheck_stats stats;
982
983 trace_ocfs2_fill_super(sb, data, silent);
984
985 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
986 status = -EINVAL;
987 goto read_super_error;
988 }
989
990
991 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
992 if (status < 0) {
993 mlog(ML_ERROR, "superblock probe failed!\n");
994 goto read_super_error;
995 }
996
997 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
998 osb = OCFS2_SB(sb);
999 if (status < 0) {
1000 mlog_errno(status);
1001 goto read_super_error;
1002 }
1003 brelse(bh);
1004 bh = NULL;
1005
1006 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1007 status = -EINVAL;
1008 goto read_super_error;
1009 }
1010 osb->s_mount_opt = parsed_options.mount_opt;
1011 osb->s_atime_quantum = parsed_options.atime_quantum;
1012 osb->preferred_slot = parsed_options.slot;
1013 osb->osb_commit_interval = parsed_options.commit_interval;
1014
1015 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1016 osb->osb_resv_level = parsed_options.resv_level;
1017 osb->osb_dir_resv_level = parsed_options.resv_level;
1018 if (parsed_options.dir_resv_level == -1)
1019 osb->osb_dir_resv_level = parsed_options.resv_level;
1020 else
1021 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1022
1023 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1024 if (status)
1025 goto read_super_error;
1026
1027 sb->s_magic = OCFS2_SUPER_MAGIC;
1028
1029 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1030 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1031
1032
1033
1034 if (bdev_read_only(sb->s_bdev)) {
1035 if (!sb_rdonly(sb)) {
1036 status = -EACCES;
1037 mlog(ML_ERROR, "Readonly device detected but readonly "
1038 "mount was not specified.\n");
1039 goto read_super_error;
1040 }
1041
1042
1043
1044 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1045 status = -EROFS;
1046 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1047 "device.\n");
1048 goto read_super_error;
1049 }
1050
1051 status = ocfs2_check_journals_nolocks(osb);
1052 if (status < 0) {
1053 if (status == -EROFS)
1054 mlog(ML_ERROR, "Recovery required on readonly "
1055 "file system, but write access is "
1056 "unavailable.\n");
1057 else
1058 mlog_errno(status);
1059 goto read_super_error;
1060 }
1061
1062 ocfs2_set_ro_flag(osb, 1);
1063
1064 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1065 "Cluster services will not be used for this mount. "
1066 "Recovery will be skipped.\n", osb->dev_str);
1067 }
1068
1069 if (!ocfs2_is_hard_readonly(osb)) {
1070 if (sb_rdonly(sb))
1071 ocfs2_set_ro_flag(osb, 0);
1072 }
1073
1074 status = ocfs2_verify_heartbeat(osb);
1075 if (status < 0) {
1076 mlog_errno(status);
1077 goto read_super_error;
1078 }
1079
1080 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1081 ocfs2_debugfs_root);
1082
1083 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1084 osb->osb_debug_root,
1085 osb,
1086 &ocfs2_osb_debug_fops);
1087
1088 if (ocfs2_meta_ecc(osb))
1089 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1090 osb->osb_debug_root);
1091
1092 status = ocfs2_mount_volume(sb);
1093 if (status < 0)
1094 goto read_super_error;
1095
1096 if (osb->root_inode)
1097 inode = igrab(osb->root_inode);
1098
1099 if (!inode) {
1100 status = -EIO;
1101 mlog_errno(status);
1102 goto read_super_error;
1103 }
1104
1105 root = d_make_root(inode);
1106 if (!root) {
1107 status = -ENOMEM;
1108 mlog_errno(status);
1109 goto read_super_error;
1110 }
1111
1112 sb->s_root = root;
1113
1114 ocfs2_complete_mount_recovery(osb);
1115
1116 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1117 &ocfs2_kset->kobj);
1118 if (!osb->osb_dev_kset) {
1119 status = -ENOMEM;
1120 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1121 goto read_super_error;
1122 }
1123
1124
1125
1126 if (ocfs2_filecheck_create_sysfs(osb)) {
1127 status = -ENOMEM;
1128 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1129 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1130 goto read_super_error;
1131 }
1132
1133 if (ocfs2_mount_local(osb))
1134 snprintf(nodestr, sizeof(nodestr), "local");
1135 else
1136 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1137
1138 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1139 "with %s data mode.\n",
1140 osb->dev_str, nodestr, osb->slot_num,
1141 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1142 "ordered");
1143
1144 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1145 wake_up(&osb->osb_mount_event);
1146
1147
1148
1149
1150 if (!sb_rdonly(sb)) {
1151 status = ocfs2_enable_quotas(osb);
1152 if (status < 0) {
1153
1154
1155 mlog_errno(status);
1156 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1157 wake_up(&osb->osb_mount_event);
1158 return status;
1159 }
1160 }
1161
1162 ocfs2_complete_quota_recovery(osb);
1163
1164
1165 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1166 wake_up(&osb->osb_mount_event);
1167
1168
1169 ocfs2_orphan_scan_start(osb);
1170
1171 return status;
1172
1173read_super_error:
1174 brelse(bh);
1175
1176 if (status)
1177 mlog_errno(status);
1178
1179 if (osb) {
1180 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1181 wake_up(&osb->osb_mount_event);
1182 ocfs2_dismount_volume(sb, 1);
1183 }
1184
1185 return status;
1186}
1187
1188static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1189 int flags,
1190 const char *dev_name,
1191 void *data)
1192{
1193 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1194}
1195
1196static struct file_system_type ocfs2_fs_type = {
1197 .owner = THIS_MODULE,
1198 .name = "ocfs2",
1199 .mount = ocfs2_mount,
1200 .kill_sb = kill_block_super,
1201 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1202 .next = NULL
1203};
1204MODULE_ALIAS_FS("ocfs2");
1205
1206static int ocfs2_check_set_options(struct super_block *sb,
1207 struct mount_options *options)
1208{
1209 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1210 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1211 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1212 mlog(ML_ERROR, "User quotas were requested, but this "
1213 "filesystem does not have the feature enabled.\n");
1214 return 0;
1215 }
1216 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1217 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1218 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1219 mlog(ML_ERROR, "Group quotas were requested, but this "
1220 "filesystem does not have the feature enabled.\n");
1221 return 0;
1222 }
1223 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1224 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1225 mlog(ML_ERROR, "ACL support requested but extended attributes "
1226 "feature is not enabled\n");
1227 return 0;
1228 }
1229
1230 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1231 OCFS2_MOUNT_NO_POSIX_ACL))) {
1232 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1233 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1234 else
1235 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1236 }
1237 return 1;
1238}
1239
1240static int ocfs2_parse_options(struct super_block *sb,
1241 char *options,
1242 struct mount_options *mopt,
1243 int is_remount)
1244{
1245 int status, user_stack = 0;
1246 char *p;
1247 u32 tmp;
1248 int token, option;
1249 substring_t args[MAX_OPT_ARGS];
1250
1251 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1252
1253 mopt->commit_interval = 0;
1254 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1255 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1256 mopt->slot = OCFS2_INVALID_SLOT;
1257 mopt->localalloc_opt = -1;
1258 mopt->cluster_stack[0] = '\0';
1259 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1260 mopt->dir_resv_level = -1;
1261
1262 if (!options) {
1263 status = 1;
1264 goto bail;
1265 }
1266
1267 while ((p = strsep(&options, ",")) != NULL) {
1268 if (!*p)
1269 continue;
1270
1271 token = match_token(p, tokens, args);
1272 switch (token) {
1273 case Opt_hb_local:
1274 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1275 break;
1276 case Opt_hb_none:
1277 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1278 break;
1279 case Opt_hb_global:
1280 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1281 break;
1282 case Opt_barrier:
1283 if (match_int(&args[0], &option)) {
1284 status = 0;
1285 goto bail;
1286 }
1287 if (option)
1288 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1289 else
1290 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1291 break;
1292 case Opt_intr:
1293 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1294 break;
1295 case Opt_nointr:
1296 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1297 break;
1298 case Opt_err_panic:
1299 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1300 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1301 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1302 break;
1303 case Opt_err_ro:
1304 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1305 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1306 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1307 break;
1308 case Opt_err_cont:
1309 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1310 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1311 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1312 break;
1313 case Opt_data_ordered:
1314 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1315 break;
1316 case Opt_data_writeback:
1317 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1318 break;
1319 case Opt_user_xattr:
1320 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1321 break;
1322 case Opt_nouser_xattr:
1323 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1324 break;
1325 case Opt_atime_quantum:
1326 if (match_int(&args[0], &option)) {
1327 status = 0;
1328 goto bail;
1329 }
1330 if (option >= 0)
1331 mopt->atime_quantum = option;
1332 break;
1333 case Opt_slot:
1334 if (match_int(&args[0], &option)) {
1335 status = 0;
1336 goto bail;
1337 }
1338 if (option)
1339 mopt->slot = (s16)option;
1340 break;
1341 case Opt_commit:
1342 if (match_int(&args[0], &option)) {
1343 status = 0;
1344 goto bail;
1345 }
1346 if (option < 0)
1347 return 0;
1348 if (option == 0)
1349 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1350 mopt->commit_interval = HZ * option;
1351 break;
1352 case Opt_localalloc:
1353 if (match_int(&args[0], &option)) {
1354 status = 0;
1355 goto bail;
1356 }
1357 if (option >= 0)
1358 mopt->localalloc_opt = option;
1359 break;
1360 case Opt_localflocks:
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371 if (!is_remount)
1372 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1373 break;
1374 case Opt_stack:
1375
1376
1377
1378
1379 if (((args[0].to - args[0].from) !=
1380 OCFS2_STACK_LABEL_LEN) ||
1381 (strnlen(args[0].from,
1382 OCFS2_STACK_LABEL_LEN) !=
1383 OCFS2_STACK_LABEL_LEN)) {
1384 mlog(ML_ERROR,
1385 "Invalid cluster_stack option\n");
1386 status = 0;
1387 goto bail;
1388 }
1389 memcpy(mopt->cluster_stack, args[0].from,
1390 OCFS2_STACK_LABEL_LEN);
1391 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1392
1393
1394
1395
1396
1397 if (memcmp(mopt->cluster_stack,
1398 OCFS2_CLASSIC_CLUSTER_STACK,
1399 OCFS2_STACK_LABEL_LEN))
1400 user_stack = 1;
1401 break;
1402 case Opt_inode64:
1403 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1404 break;
1405 case Opt_usrquota:
1406 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1407 break;
1408 case Opt_grpquota:
1409 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1410 break;
1411 case Opt_coherency_buffered:
1412 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1413 break;
1414 case Opt_coherency_full:
1415 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1416 break;
1417 case Opt_acl:
1418 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1419 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1420 break;
1421 case Opt_noacl:
1422 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1423 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1424 break;
1425 case Opt_resv_level:
1426 if (is_remount)
1427 break;
1428 if (match_int(&args[0], &option)) {
1429 status = 0;
1430 goto bail;
1431 }
1432 if (option >= OCFS2_MIN_RESV_LEVEL &&
1433 option < OCFS2_MAX_RESV_LEVEL)
1434 mopt->resv_level = option;
1435 break;
1436 case Opt_dir_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->dir_resv_level = option;
1446 break;
1447 case Opt_journal_async_commit:
1448 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1449 break;
1450 default:
1451 mlog(ML_ERROR,
1452 "Unrecognized mount option \"%s\" "
1453 "or missing value\n", p);
1454 status = 0;
1455 goto bail;
1456 }
1457 }
1458
1459 if (user_stack == 0) {
1460
1461 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1462 OCFS2_MOUNT_HB_GLOBAL |
1463 OCFS2_MOUNT_HB_NONE);
1464 if (hweight32(tmp) != 1) {
1465 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1466 status = 0;
1467 goto bail;
1468 }
1469 }
1470
1471 status = 1;
1472
1473bail:
1474 return status;
1475}
1476
1477static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1478{
1479 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1480 unsigned long opts = osb->s_mount_opt;
1481 unsigned int local_alloc_megs;
1482
1483 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1484 seq_printf(s, ",_netdev");
1485 if (opts & OCFS2_MOUNT_HB_LOCAL)
1486 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1487 else
1488 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1489 } else
1490 seq_printf(s, ",%s", OCFS2_HB_NONE);
1491
1492 if (opts & OCFS2_MOUNT_NOINTR)
1493 seq_printf(s, ",nointr");
1494
1495 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1496 seq_printf(s, ",data=writeback");
1497 else
1498 seq_printf(s, ",data=ordered");
1499
1500 if (opts & OCFS2_MOUNT_BARRIER)
1501 seq_printf(s, ",barrier=1");
1502
1503 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1504 seq_printf(s, ",errors=panic");
1505 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1506 seq_printf(s, ",errors=continue");
1507 else
1508 seq_printf(s, ",errors=remount-ro");
1509
1510 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1511 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1512
1513 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1514
1515 if (osb->osb_commit_interval)
1516 seq_printf(s, ",commit=%u",
1517 (unsigned) (osb->osb_commit_interval / HZ));
1518
1519 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1520 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1521 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1522
1523 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1524 seq_printf(s, ",localflocks,");
1525
1526 if (osb->osb_cluster_stack[0])
1527 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1528 OCFS2_STACK_LABEL_LEN);
1529 if (opts & OCFS2_MOUNT_USRQUOTA)
1530 seq_printf(s, ",usrquota");
1531 if (opts & OCFS2_MOUNT_GRPQUOTA)
1532 seq_printf(s, ",grpquota");
1533
1534 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1535 seq_printf(s, ",coherency=buffered");
1536 else
1537 seq_printf(s, ",coherency=full");
1538
1539 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1540 seq_printf(s, ",nouser_xattr");
1541 else
1542 seq_printf(s, ",user_xattr");
1543
1544 if (opts & OCFS2_MOUNT_INODE64)
1545 seq_printf(s, ",inode64");
1546
1547 if (opts & OCFS2_MOUNT_POSIX_ACL)
1548 seq_printf(s, ",acl");
1549 else
1550 seq_printf(s, ",noacl");
1551
1552 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1553 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1554
1555 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1556 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1557
1558 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1559 seq_printf(s, ",journal_async_commit");
1560
1561 return 0;
1562}
1563
1564static int __init ocfs2_init(void)
1565{
1566 int status;
1567
1568 status = init_ocfs2_uptodate_cache();
1569 if (status < 0)
1570 goto out1;
1571
1572 status = ocfs2_initialize_mem_caches();
1573 if (status < 0)
1574 goto out2;
1575
1576 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1577
1578 ocfs2_set_locking_protocol();
1579
1580 status = register_quota_format(&ocfs2_quota_format);
1581 if (status < 0)
1582 goto out3;
1583 status = register_filesystem(&ocfs2_fs_type);
1584 if (!status)
1585 return 0;
1586
1587 unregister_quota_format(&ocfs2_quota_format);
1588out3:
1589 debugfs_remove(ocfs2_debugfs_root);
1590 ocfs2_free_mem_caches();
1591out2:
1592 exit_ocfs2_uptodate_cache();
1593out1:
1594 mlog_errno(status);
1595 return status;
1596}
1597
1598static void __exit ocfs2_exit(void)
1599{
1600 unregister_quota_format(&ocfs2_quota_format);
1601
1602 debugfs_remove(ocfs2_debugfs_root);
1603
1604 ocfs2_free_mem_caches();
1605
1606 unregister_filesystem(&ocfs2_fs_type);
1607
1608 exit_ocfs2_uptodate_cache();
1609}
1610
1611static void ocfs2_put_super(struct super_block *sb)
1612{
1613 trace_ocfs2_put_super(sb);
1614
1615 ocfs2_sync_blockdev(sb);
1616 ocfs2_dismount_volume(sb, 0);
1617}
1618
1619static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1620{
1621 struct ocfs2_super *osb;
1622 u32 numbits, freebits;
1623 int status;
1624 struct ocfs2_dinode *bm_lock;
1625 struct buffer_head *bh = NULL;
1626 struct inode *inode = NULL;
1627
1628 trace_ocfs2_statfs(dentry->d_sb, buf);
1629
1630 osb = OCFS2_SB(dentry->d_sb);
1631
1632 inode = ocfs2_get_system_file_inode(osb,
1633 GLOBAL_BITMAP_SYSTEM_INODE,
1634 OCFS2_INVALID_SLOT);
1635 if (!inode) {
1636 mlog(ML_ERROR, "failed to get bitmap inode\n");
1637 status = -EIO;
1638 goto bail;
1639 }
1640
1641 status = ocfs2_inode_lock(inode, &bh, 0);
1642 if (status < 0) {
1643 mlog_errno(status);
1644 goto bail;
1645 }
1646
1647 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1648
1649 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1650 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1651
1652 buf->f_type = OCFS2_SUPER_MAGIC;
1653 buf->f_bsize = dentry->d_sb->s_blocksize;
1654 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1655 buf->f_blocks = ((sector_t) numbits) *
1656 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1657 buf->f_bfree = ((sector_t) freebits) *
1658 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1659 buf->f_bavail = buf->f_bfree;
1660 buf->f_files = numbits;
1661 buf->f_ffree = freebits;
1662 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1663 & 0xFFFFFFFFUL;
1664 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1665 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1666
1667 brelse(bh);
1668
1669 ocfs2_inode_unlock(inode, 0);
1670 status = 0;
1671bail:
1672 iput(inode);
1673
1674 if (status)
1675 mlog_errno(status);
1676
1677 return status;
1678}
1679
1680static void ocfs2_inode_init_once(void *data)
1681{
1682 struct ocfs2_inode_info *oi = data;
1683
1684 oi->ip_flags = 0;
1685 oi->ip_open_count = 0;
1686 spin_lock_init(&oi->ip_lock);
1687 ocfs2_extent_map_init(&oi->vfs_inode);
1688 INIT_LIST_HEAD(&oi->ip_io_markers);
1689 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1690 oi->ip_dir_start_lookup = 0;
1691 init_rwsem(&oi->ip_alloc_sem);
1692 init_rwsem(&oi->ip_xattr_sem);
1693 mutex_init(&oi->ip_io_mutex);
1694
1695 oi->ip_blkno = 0ULL;
1696 oi->ip_clusters = 0;
1697
1698 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1699
1700 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1701 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1702 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1703
1704 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1705 &ocfs2_inode_caching_ops);
1706
1707 inode_init_once(&oi->vfs_inode);
1708}
1709
1710static int ocfs2_initialize_mem_caches(void)
1711{
1712 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1713 sizeof(struct ocfs2_inode_info),
1714 0,
1715 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1716 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1717 ocfs2_inode_init_once);
1718 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1719 sizeof(struct ocfs2_dquot),
1720 0,
1721 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1722 SLAB_MEM_SPREAD),
1723 NULL);
1724 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1725 sizeof(struct ocfs2_quota_chunk),
1726 0,
1727 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1728 NULL);
1729 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1730 !ocfs2_qf_chunk_cachep) {
1731 kmem_cache_destroy(ocfs2_inode_cachep);
1732 kmem_cache_destroy(ocfs2_dquot_cachep);
1733 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1734 return -ENOMEM;
1735 }
1736
1737 return 0;
1738}
1739
1740static void ocfs2_free_mem_caches(void)
1741{
1742
1743
1744
1745
1746 rcu_barrier();
1747 kmem_cache_destroy(ocfs2_inode_cachep);
1748 ocfs2_inode_cachep = NULL;
1749
1750 kmem_cache_destroy(ocfs2_dquot_cachep);
1751 ocfs2_dquot_cachep = NULL;
1752
1753 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1754 ocfs2_qf_chunk_cachep = NULL;
1755}
1756
1757static int ocfs2_get_sector(struct super_block *sb,
1758 struct buffer_head **bh,
1759 int block,
1760 int sect_size)
1761{
1762 if (!sb_set_blocksize(sb, sect_size)) {
1763 mlog(ML_ERROR, "unable to set blocksize\n");
1764 return -EIO;
1765 }
1766
1767 *bh = sb_getblk(sb, block);
1768 if (!*bh) {
1769 mlog_errno(-ENOMEM);
1770 return -ENOMEM;
1771 }
1772 lock_buffer(*bh);
1773 if (!buffer_dirty(*bh))
1774 clear_buffer_uptodate(*bh);
1775 unlock_buffer(*bh);
1776 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1777 wait_on_buffer(*bh);
1778 if (!buffer_uptodate(*bh)) {
1779 mlog_errno(-EIO);
1780 brelse(*bh);
1781 *bh = NULL;
1782 return -EIO;
1783 }
1784
1785 return 0;
1786}
1787
1788static int ocfs2_mount_volume(struct super_block *sb)
1789{
1790 int status = 0;
1791 int unlock_super = 0;
1792 struct ocfs2_super *osb = OCFS2_SB(sb);
1793
1794 if (ocfs2_is_hard_readonly(osb))
1795 goto leave;
1796
1797 mutex_init(&osb->obs_trim_fs_mutex);
1798
1799 status = ocfs2_dlm_init(osb);
1800 if (status < 0) {
1801 mlog_errno(status);
1802 if (status == -EBADR && ocfs2_userspace_stack(osb))
1803 mlog(ML_ERROR, "couldn't mount because cluster name on"
1804 " disk does not match the running cluster name.\n");
1805 goto leave;
1806 }
1807
1808 status = ocfs2_super_lock(osb, 1);
1809 if (status < 0) {
1810 mlog_errno(status);
1811 goto leave;
1812 }
1813 unlock_super = 1;
1814
1815
1816 status = ocfs2_find_slot(osb);
1817 if (status < 0) {
1818 mlog_errno(status);
1819 goto leave;
1820 }
1821
1822
1823 status = ocfs2_init_local_system_inodes(osb);
1824 if (status < 0) {
1825 mlog_errno(status);
1826 goto leave;
1827 }
1828
1829 status = ocfs2_check_volume(osb);
1830 if (status < 0) {
1831 mlog_errno(status);
1832 goto leave;
1833 }
1834
1835 status = ocfs2_truncate_log_init(osb);
1836 if (status < 0)
1837 mlog_errno(status);
1838
1839leave:
1840 if (unlock_super)
1841 ocfs2_super_unlock(osb, 1);
1842
1843 return status;
1844}
1845
1846static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1847{
1848 int tmp, hangup_needed = 0;
1849 struct ocfs2_super *osb = NULL;
1850 char nodestr[12];
1851
1852 trace_ocfs2_dismount_volume(sb);
1853
1854 BUG_ON(!sb);
1855 osb = OCFS2_SB(sb);
1856 BUG_ON(!osb);
1857
1858
1859
1860 ocfs2_filecheck_remove_sysfs(osb);
1861
1862 kset_unregister(osb->osb_dev_kset);
1863
1864 debugfs_remove(osb->osb_ctxt);
1865
1866
1867 ocfs2_orphan_scan_stop(osb);
1868
1869 ocfs2_disable_quotas(osb);
1870
1871
1872 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1873
1874 cancel_work_sync(&osb->dquot_drop_work);
1875
1876 ocfs2_shutdown_local_alloc(osb);
1877
1878 ocfs2_truncate_log_shutdown(osb);
1879
1880
1881 ocfs2_recovery_exit(osb);
1882
1883 ocfs2_journal_shutdown(osb);
1884
1885 ocfs2_sync_blockdev(sb);
1886
1887 ocfs2_purge_refcount_trees(osb);
1888
1889
1890
1891 if (osb->cconn) {
1892 tmp = ocfs2_super_lock(osb, 1);
1893 if (tmp < 0) {
1894 mlog_errno(tmp);
1895 return;
1896 }
1897 }
1898
1899 if (osb->slot_num != OCFS2_INVALID_SLOT)
1900 ocfs2_put_slot(osb);
1901
1902 if (osb->cconn)
1903 ocfs2_super_unlock(osb, 1);
1904
1905 ocfs2_release_system_inodes(osb);
1906
1907
1908
1909
1910
1911
1912
1913 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1914 !ocfs2_is_hard_readonly(osb))
1915 hangup_needed = 1;
1916
1917 if (osb->cconn)
1918 ocfs2_dlm_shutdown(osb, hangup_needed);
1919
1920 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1921 debugfs_remove(osb->osb_debug_root);
1922
1923 if (hangup_needed)
1924 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1925
1926 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1927
1928 if (ocfs2_mount_local(osb))
1929 snprintf(nodestr, sizeof(nodestr), "local");
1930 else
1931 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1932
1933 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1934 osb->dev_str, nodestr);
1935
1936 ocfs2_delete_osb(osb);
1937 kfree(osb);
1938 sb->s_dev = 0;
1939 sb->s_fs_info = NULL;
1940}
1941
1942static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1943 unsigned uuid_bytes)
1944{
1945 int i, ret;
1946 char *ptr;
1947
1948 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1949
1950 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1951 if (osb->uuid_str == NULL)
1952 return -ENOMEM;
1953
1954 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1955
1956 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1957 if (ret != 2)
1958 return -EINVAL;
1959
1960 ptr += 2;
1961 }
1962
1963 return 0;
1964}
1965
1966
1967
1968
1969static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1970{
1971 int status = 0;
1972 u64 max_block =
1973 ocfs2_clusters_to_blocks(osb->sb,
1974 osb->osb_clusters_at_boot) - 1;
1975
1976
1977 if (max_block <= (u32)~0ULL)
1978 goto out;
1979
1980
1981
1982 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1983 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1984 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1985 JBD2_FEATURE_INCOMPAT_64BIT))) {
1986 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1987 "Enable the 'block64' journal option with tunefs.ocfs2");
1988 status = -EFBIG;
1989 goto out;
1990 }
1991
1992 out:
1993 return status;
1994}
1995
1996static int ocfs2_initialize_super(struct super_block *sb,
1997 struct buffer_head *bh,
1998 int sector_size,
1999 struct ocfs2_blockcheck_stats *stats)
2000{
2001 int status;
2002 int i, cbits, bbits;
2003 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2004 struct inode *inode = NULL;
2005 struct ocfs2_journal *journal;
2006 struct ocfs2_super *osb;
2007 u64 total_blocks;
2008
2009 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2010 if (!osb) {
2011 status = -ENOMEM;
2012 mlog_errno(status);
2013 goto bail;
2014 }
2015
2016 sb->s_fs_info = osb;
2017 sb->s_op = &ocfs2_sops;
2018 sb->s_d_op = &ocfs2_dentry_ops;
2019 sb->s_export_op = &ocfs2_export_ops;
2020 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2021 sb->dq_op = &ocfs2_quota_operations;
2022 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2023 sb->s_xattr = ocfs2_xattr_handlers;
2024 sb->s_time_gran = 1;
2025 sb->s_flags |= SB_NOATIME;
2026
2027 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2028 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2029 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2030 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2031 sizeof(di->id2.i_super.s_uuid));
2032
2033 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2034
2035 for (i = 0; i < 3; i++)
2036 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2037 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2038
2039 osb->sb = sb;
2040 osb->s_sectsize_bits = blksize_bits(sector_size);
2041 BUG_ON(!osb->s_sectsize_bits);
2042
2043 spin_lock_init(&osb->dc_task_lock);
2044 init_waitqueue_head(&osb->dc_event);
2045 osb->dc_work_sequence = 0;
2046 osb->dc_wake_sequence = 0;
2047 INIT_LIST_HEAD(&osb->blocked_lock_list);
2048 osb->blocked_lock_count = 0;
2049 spin_lock_init(&osb->osb_lock);
2050 spin_lock_init(&osb->osb_xattr_lock);
2051 ocfs2_init_steal_slots(osb);
2052
2053 mutex_init(&osb->system_file_mutex);
2054
2055 atomic_set(&osb->alloc_stats.moves, 0);
2056 atomic_set(&osb->alloc_stats.local_data, 0);
2057 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2058 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2059 atomic_set(&osb->alloc_stats.bg_extends, 0);
2060
2061
2062 osb->osb_ecc_stats = *stats;
2063
2064 ocfs2_init_node_maps(osb);
2065
2066 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2067 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2068
2069 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2070 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2071 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2072 osb->max_slots);
2073 status = -EINVAL;
2074 goto bail;
2075 }
2076
2077 ocfs2_orphan_scan_init(osb);
2078
2079 status = ocfs2_recovery_init(osb);
2080 if (status) {
2081 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2082 mlog_errno(status);
2083 goto bail;
2084 }
2085
2086 init_waitqueue_head(&osb->checkpoint_event);
2087
2088 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2089
2090 osb->slot_num = OCFS2_INVALID_SLOT;
2091
2092 osb->s_xattr_inline_size = le16_to_cpu(
2093 di->id2.i_super.s_xattr_inline_size);
2094
2095 osb->local_alloc_state = OCFS2_LA_UNUSED;
2096 osb->local_alloc_bh = NULL;
2097 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2098
2099 init_waitqueue_head(&osb->osb_mount_event);
2100
2101 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2102 if (status) {
2103 mlog_errno(status);
2104 goto bail;
2105 }
2106
2107 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2108 if (!osb->vol_label) {
2109 mlog(ML_ERROR, "unable to alloc vol label\n");
2110 status = -ENOMEM;
2111 goto bail;
2112 }
2113
2114 osb->slot_recovery_generations =
2115 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2116 GFP_KERNEL);
2117 if (!osb->slot_recovery_generations) {
2118 status = -ENOMEM;
2119 mlog_errno(status);
2120 goto bail;
2121 }
2122
2123 init_waitqueue_head(&osb->osb_wipe_event);
2124 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2125 sizeof(*osb->osb_orphan_wipes),
2126 GFP_KERNEL);
2127 if (!osb->osb_orphan_wipes) {
2128 status = -ENOMEM;
2129 mlog_errno(status);
2130 goto bail;
2131 }
2132
2133 osb->osb_rf_lock_tree = RB_ROOT;
2134
2135 osb->s_feature_compat =
2136 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2137 osb->s_feature_ro_compat =
2138 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2139 osb->s_feature_incompat =
2140 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2141
2142 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2143 mlog(ML_ERROR, "couldn't mount because of unsupported "
2144 "optional features (%x).\n", i);
2145 status = -EINVAL;
2146 goto bail;
2147 }
2148 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2149 mlog(ML_ERROR, "couldn't mount RDWR because of "
2150 "unsupported optional features (%x).\n", i);
2151 status = -EINVAL;
2152 goto bail;
2153 }
2154
2155 if (ocfs2_clusterinfo_valid(osb)) {
2156 osb->osb_stackflags =
2157 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2158 strlcpy(osb->osb_cluster_stack,
2159 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2160 OCFS2_STACK_LABEL_LEN + 1);
2161 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2162 mlog(ML_ERROR,
2163 "couldn't mount because of an invalid "
2164 "cluster stack label (%s) \n",
2165 osb->osb_cluster_stack);
2166 status = -EINVAL;
2167 goto bail;
2168 }
2169 strlcpy(osb->osb_cluster_name,
2170 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2171 OCFS2_CLUSTER_NAME_LEN + 1);
2172 } else {
2173
2174
2175 osb->osb_cluster_stack[0] = '\0';
2176 }
2177
2178 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2190 if (!journal) {
2191 mlog(ML_ERROR, "unable to alloc journal\n");
2192 status = -ENOMEM;
2193 goto bail;
2194 }
2195 osb->journal = journal;
2196 journal->j_osb = osb;
2197
2198 atomic_set(&journal->j_num_trans, 0);
2199 init_rwsem(&journal->j_trans_barrier);
2200 init_waitqueue_head(&journal->j_checkpointed);
2201 spin_lock_init(&journal->j_lock);
2202 journal->j_trans_id = (unsigned long) 1;
2203 INIT_LIST_HEAD(&journal->j_la_cleanups);
2204 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2205 journal->j_state = OCFS2_JOURNAL_FREE;
2206
2207 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2208 init_llist_head(&osb->dquot_drop_list);
2209
2210
2211 osb->s_clustersize_bits =
2212 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2213 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2214
2215 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2216 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2217 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2218 osb->s_clustersize);
2219 status = -EINVAL;
2220 goto bail;
2221 }
2222
2223 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2224 le32_to_cpu(di->i_clusters));
2225
2226 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2227 total_blocks);
2228 if (status) {
2229 mlog(ML_ERROR, "Volume too large "
2230 "to mount safely on this system");
2231 status = -EFBIG;
2232 goto bail;
2233 }
2234
2235 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2236 sizeof(di->id2.i_super.s_uuid))) {
2237 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2238 status = -ENOMEM;
2239 goto bail;
2240 }
2241
2242 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2243 OCFS2_MAX_VOL_LABEL_LEN);
2244 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2245 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2246 osb->first_cluster_group_blkno =
2247 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2248 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2249 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2250 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2251 (unsigned long long)osb->root_blkno,
2252 (unsigned long long)osb->system_dir_blkno,
2253 osb->s_clustersize_bits);
2254
2255 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2256 if (!osb->osb_dlm_debug) {
2257 status = -ENOMEM;
2258 mlog_errno(status);
2259 goto bail;
2260 }
2261
2262 atomic_set(&osb->vol_state, VOLUME_INIT);
2263
2264
2265 status = ocfs2_init_global_system_inodes(osb);
2266 if (status < 0) {
2267 mlog_errno(status);
2268 goto bail;
2269 }
2270
2271
2272
2273
2274 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2275 OCFS2_INVALID_SLOT);
2276 if (!inode) {
2277 status = -EINVAL;
2278 mlog_errno(status);
2279 goto bail;
2280 }
2281
2282 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2283 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2284 iput(inode);
2285
2286 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2287 osb->s_feature_incompat) * 8;
2288
2289 status = ocfs2_init_slot_info(osb);
2290 if (status < 0) {
2291 mlog_errno(status);
2292 goto bail;
2293 }
2294 cleancache_init_shared_fs(sb);
2295
2296 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2297 if (!osb->ocfs2_wq) {
2298 status = -ENOMEM;
2299 mlog_errno(status);
2300 }
2301
2302bail:
2303 return status;
2304}
2305
2306
2307
2308
2309
2310
2311static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2312 struct buffer_head *bh,
2313 u32 blksz,
2314 struct ocfs2_blockcheck_stats *stats)
2315{
2316 int status = -EAGAIN;
2317
2318 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2319 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2320
2321 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2322 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2323 status = ocfs2_block_check_validate(bh->b_data,
2324 bh->b_size,
2325 &di->i_check,
2326 stats);
2327 if (status)
2328 goto out;
2329 }
2330 status = -EINVAL;
2331 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2332 mlog(ML_ERROR, "found superblock with incorrect block "
2333 "size: found %u, should be %u\n",
2334 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2335 blksz);
2336 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2337 OCFS2_MAJOR_REV_LEVEL ||
2338 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2339 OCFS2_MINOR_REV_LEVEL) {
2340 mlog(ML_ERROR, "found superblock with bad version: "
2341 "found %u.%u, should be %u.%u\n",
2342 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2343 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2344 OCFS2_MAJOR_REV_LEVEL,
2345 OCFS2_MINOR_REV_LEVEL);
2346 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2347 mlog(ML_ERROR, "bad block number on superblock: "
2348 "found %llu, should be %llu\n",
2349 (unsigned long long)le64_to_cpu(di->i_blkno),
2350 (unsigned long long)bh->b_blocknr);
2351 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2352 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2353 mlog(ML_ERROR, "bad cluster size found: %u\n",
2354 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2355 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2356 mlog(ML_ERROR, "bad root_blkno: 0\n");
2357 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2358 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2359 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2360 mlog(ML_ERROR,
2361 "Superblock slots found greater than file system "
2362 "maximum: found %u, max %u\n",
2363 le16_to_cpu(di->id2.i_super.s_max_slots),
2364 OCFS2_MAX_SLOTS);
2365 } else {
2366
2367 status = 0;
2368 }
2369 }
2370
2371out:
2372 if (status && status != -EAGAIN)
2373 mlog_errno(status);
2374 return status;
2375}
2376
2377static int ocfs2_check_volume(struct ocfs2_super *osb)
2378{
2379 int status;
2380 int dirty;
2381 int local;
2382 struct ocfs2_dinode *local_alloc = NULL;
2383
2384
2385
2386
2387 status = ocfs2_journal_init(osb->journal, &dirty);
2388 if (status < 0) {
2389 mlog(ML_ERROR, "Could not initialize journal!\n");
2390 goto finally;
2391 }
2392
2393
2394
2395 status = ocfs2_journal_addressable(osb);
2396 if (status)
2397 goto finally;
2398
2399
2400
2401
2402 if (!dirty) {
2403 status = ocfs2_journal_wipe(osb->journal, 0);
2404 if (status < 0) {
2405 mlog_errno(status);
2406 goto finally;
2407 }
2408 } else {
2409 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2410 "unmounted cleanly, recovering it.\n", osb->dev_str);
2411 }
2412
2413 local = ocfs2_mount_local(osb);
2414
2415
2416 status = ocfs2_journal_load(osb->journal, local, dirty);
2417 if (status < 0) {
2418 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2419 goto finally;
2420 }
2421
2422 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2423 jbd2_journal_set_features(osb->journal->j_journal,
2424 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2425 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2426 else
2427 jbd2_journal_clear_features(osb->journal->j_journal,
2428 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2429 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2430
2431 if (dirty) {
2432
2433 status = ocfs2_begin_local_alloc_recovery(osb,
2434 osb->slot_num,
2435 &local_alloc);
2436 if (status < 0) {
2437 mlog_errno(status);
2438 goto finally;
2439 }
2440
2441
2442 }
2443
2444 status = ocfs2_load_local_alloc(osb);
2445 if (status < 0) {
2446 mlog_errno(status);
2447 goto finally;
2448 }
2449
2450 if (dirty) {
2451
2452
2453 osb->local_alloc_copy = local_alloc;
2454 local_alloc = NULL;
2455 }
2456
2457
2458
2459
2460 status = ocfs2_mark_dead_nodes(osb);
2461 if (status < 0) {
2462 mlog_errno(status);
2463 goto finally;
2464 }
2465
2466 status = ocfs2_compute_replay_slots(osb);
2467 if (status < 0)
2468 mlog_errno(status);
2469
2470finally:
2471 kfree(local_alloc);
2472
2473 if (status)
2474 mlog_errno(status);
2475 return status;
2476}
2477
2478
2479
2480
2481
2482
2483
2484static void ocfs2_delete_osb(struct ocfs2_super *osb)
2485{
2486
2487
2488
2489 if (osb->ocfs2_wq)
2490 destroy_workqueue(osb->ocfs2_wq);
2491
2492 ocfs2_free_slot_info(osb);
2493
2494 kfree(osb->osb_orphan_wipes);
2495 kfree(osb->slot_recovery_generations);
2496
2497
2498
2499
2500
2501 kfree(osb->journal);
2502 kfree(osb->local_alloc_copy);
2503 kfree(osb->uuid_str);
2504 kfree(osb->vol_label);
2505 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2506 memset(osb, 0, sizeof(struct ocfs2_super));
2507}
2508
2509
2510
2511
2512
2513
2514
2515static int ocfs2_handle_error(struct super_block *sb)
2516{
2517 struct ocfs2_super *osb = OCFS2_SB(sb);
2518 int rv = 0;
2519
2520 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2521 pr_crit("On-disk corruption discovered. "
2522 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2523
2524 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2525 panic("OCFS2: (device %s): panic forced after error\n",
2526 sb->s_id);
2527 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2528 pr_crit("OCFS2: Returning error to the calling process.\n");
2529 rv = -EIO;
2530 } else {
2531 rv = -EROFS;
2532 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2533 return rv;
2534
2535 pr_crit("OCFS2: File system is now read-only.\n");
2536 sb->s_flags |= SB_RDONLY;
2537 ocfs2_set_ro_flag(osb, 0);
2538 }
2539
2540 return rv;
2541}
2542
2543int __ocfs2_error(struct super_block *sb, const char *function,
2544 const char *fmt, ...)
2545{
2546 struct va_format vaf;
2547 va_list args;
2548
2549 va_start(args, fmt);
2550 vaf.fmt = fmt;
2551 vaf.va = &args;
2552
2553
2554
2555 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2556 sb->s_id, function, &vaf);
2557
2558 va_end(args);
2559
2560 return ocfs2_handle_error(sb);
2561}
2562
2563
2564
2565
2566void __ocfs2_abort(struct super_block *sb, const char *function,
2567 const char *fmt, ...)
2568{
2569 struct va_format vaf;
2570 va_list args;
2571
2572 va_start(args, fmt);
2573
2574 vaf.fmt = fmt;
2575 vaf.va = &args;
2576
2577 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2578 sb->s_id, function, &vaf);
2579
2580 va_end(args);
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2594 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2595 ocfs2_handle_error(sb);
2596}
2597
2598
2599
2600
2601
2602void ocfs2_block_signals(sigset_t *oldset)
2603{
2604 int rc;
2605 sigset_t blocked;
2606
2607 sigfillset(&blocked);
2608 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2609 BUG_ON(rc);
2610}
2611
2612void ocfs2_unblock_signals(sigset_t *oldset)
2613{
2614 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2615 BUG_ON(rc);
2616}
2617
2618module_init(ocfs2_init);
2619module_exit(ocfs2_exit);
2620
