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Merge tag 'mtd/fixes-for-5.2-final' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6/linux-2.6-arm.git] / fs / ocfs2 / super.c
bloba201f9780b353196b5247fc55dc7583513ae26a5
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * super.c
6 *
7 * load/unload driver, mount/dismount volumes
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 */
11
12 #include <linux/module.h>
13 #include <linux/fs.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/highmem.h>
17 #include <linux/init.h>
18 #include <linux/random.h>
19 #include <linux/statfs.h>
20 #include <linux/moduleparam.h>
21 #include <linux/blkdev.h>
22 #include <linux/socket.h>
23 #include <linux/inet.h>
24 #include <linux/parser.h>
25 #include <linux/crc32.h>
26 #include <linux/debugfs.h>
27 #include <linux/mount.h>
28 #include <linux/seq_file.h>
29 #include <linux/quotaops.h>
30 #include <linux/cleancache.h>
31 #include <linux/signal.h>
32
33 #define CREATE_TRACE_POINTS
34 #include "ocfs2_trace.h"
35
36 #include <cluster/masklog.h>
37
38 #include "ocfs2.h"
39
40 /* this should be the only file to include a version 1 header */
41 #include "ocfs1_fs_compat.h"
42
43 #include "alloc.h"
44 #include "aops.h"
45 #include "blockcheck.h"
46 #include "dlmglue.h"
47 #include "export.h"
48 #include "extent_map.h"
49 #include "heartbeat.h"
50 #include "inode.h"
51 #include "journal.h"
52 #include "localalloc.h"
53 #include "namei.h"
54 #include "slot_map.h"
55 #include "super.h"
56 #include "sysfile.h"
57 #include "uptodate.h"
58 #include "xattr.h"
59 #include "quota.h"
60 #include "refcounttree.h"
61 #include "suballoc.h"
62
63 #include "buffer_head_io.h"
64 #include "filecheck.h"
65
66 static struct kmem_cache *ocfs2_inode_cachep;
67 struct kmem_cache *ocfs2_dquot_cachep;
68 struct kmem_cache *ocfs2_qf_chunk_cachep;
69
70 static struct dentry *ocfs2_debugfs_root;
71
72 MODULE_AUTHOR("Oracle");
73 MODULE_LICENSE("GPL");
74 MODULE_DESCRIPTION("OCFS2 cluster file system");
75
76 struct 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
88 static int ocfs2_parse_options(struct super_block *sb, char *options,
89 struct mount_options *mopt,
90 int is_remount);
91 static int ocfs2_check_set_options(struct super_block *sb,
92 struct mount_options *options);
93 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
94 static void ocfs2_put_super(struct super_block *sb);
95 static int ocfs2_mount_volume(struct super_block *sb);
96 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
97 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
98 static int ocfs2_initialize_mem_caches(void);
99 static void ocfs2_free_mem_caches(void);
100 static void ocfs2_delete_osb(struct ocfs2_super *osb);
101
102 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
103
104 static int ocfs2_sync_fs(struct super_block *sb, int wait);
105
106 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
107 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
108 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
109 static int ocfs2_check_volume(struct ocfs2_super *osb);
110 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
111 struct buffer_head *bh,
112 u32 sectsize,
113 struct ocfs2_blockcheck_stats *stats);
114 static int ocfs2_initialize_super(struct super_block *sb,
115 struct buffer_head *bh,
116 int sector_size,
117 struct ocfs2_blockcheck_stats *stats);
118 static int ocfs2_get_sector(struct super_block *sb,
119 struct buffer_head **bh,
120 int block,
121 int sect_size);
122 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
123 static void ocfs2_free_inode(struct inode *inode);
124 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
125 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
126 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
127
128 static struct dquot **ocfs2_get_dquots(struct inode *inode)
129 {
130 return OCFS2_I(inode)->i_dquot;
131 }
132
133 static 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
148 enum {
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
181 static 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
215 static 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
342 static 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;
356 bail:
357 return -ENOMEM;
358 }
359
360 static int ocfs2_debug_release(struct inode *inode, struct file *file)
361 {
362 kfree(file->private_data);
363 return 0;
364 }
365
366 static 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
373 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
374 {
375 return 0;
376 }
377 static int ocfs2_debug_release(struct inode *inode, struct file *file)
378 {
379 return 0;
380 }
381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382 size_t nbytes, loff_t *ppos)
383 {
384 return 0;
385 }
386 #endif /* CONFIG_DEBUG_FS */
387
388 static 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
395 static 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
421 static 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
434 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
435 {
436 struct inode *new = NULL;
437 int status = 0;
438 int i;
439
440 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
441 if (IS_ERR(new)) {
442 status = PTR_ERR(new);
443 mlog_errno(status);
444 goto bail;
445 }
446 osb->root_inode = new;
447
448 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->sys_root_inode = new;
455
456 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
457 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
458 if (!ocfs2_need_system_inode(osb, i))
459 continue;
460 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
461 if (!new) {
462 ocfs2_release_system_inodes(osb);
463 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
464 mlog_errno(status);
465 mlog(ML_ERROR, "Unable to load system inode %d, "
466 "possibly corrupt fs?", i);
467 goto bail;
468 }
469 // the array now has one ref, so drop this one
470 iput(new);
471 }
472
473 bail:
474 if (status)
475 mlog_errno(status);
476 return status;
477 }
478
479 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
480 {
481 struct inode *new = NULL;
482 int status = 0;
483 int i;
484
485 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
486 i < NUM_SYSTEM_INODES;
487 i++) {
488 if (!ocfs2_need_system_inode(osb, i))
489 continue;
490 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
491 if (!new) {
492 ocfs2_release_system_inodes(osb);
493 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
494 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
495 status, i, osb->slot_num);
496 goto bail;
497 }
498 /* the array now has one ref, so drop this one */
499 iput(new);
500 }
501
502 bail:
503 if (status)
504 mlog_errno(status);
505 return status;
506 }
507
508 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
509 {
510 int i;
511 struct inode *inode;
512
513 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
514 inode = osb->global_system_inodes[i];
515 if (inode) {
516 iput(inode);
517 osb->global_system_inodes[i] = NULL;
518 }
519 }
520
521 inode = osb->sys_root_inode;
522 if (inode) {
523 iput(inode);
524 osb->sys_root_inode = NULL;
525 }
526
527 inode = osb->root_inode;
528 if (inode) {
529 iput(inode);
530 osb->root_inode = NULL;
531 }
532
533 if (!osb->local_system_inodes)
534 return;
535
536 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
537 if (osb->local_system_inodes[i]) {
538 iput(osb->local_system_inodes[i]);
539 osb->local_system_inodes[i] = NULL;
540 }
541 }
542
543 kfree(osb->local_system_inodes);
544 osb->local_system_inodes = NULL;
545 }
546
547 /* We're allocating fs objects, use GFP_NOFS */
548 static 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
564 static void ocfs2_free_inode(struct inode *inode)
565 {
566 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
567 }
568
569 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
570 unsigned int cbits)
571 {
572 unsigned int bytes = 1 << cbits;
573 unsigned int trim = bytes;
574 unsigned int bitshift = 32;
575
576 /*
577 * i_size and all block offsets in ocfs2 are always 64 bits
578 * wide. i_clusters is 32 bits, in cluster-sized units. So on
579 * 64 bit platforms, cluster size will be the limiting factor.
580 */
581
582 #if BITS_PER_LONG == 32
583 BUILD_BUG_ON(sizeof(sector_t) != 8);
584 /*
585 * We might be limited by page cache size.
586 */
587 if (bytes > PAGE_SIZE) {
588 bytes = PAGE_SIZE;
589 trim = 1;
590 /*
591 * Shift by 31 here so that we don't get larger than
592 * MAX_LFS_FILESIZE
593 */
594 bitshift = 31;
595 }
596 #endif
597
598 /*
599 * Trim by a whole cluster when we can actually approach the
600 * on-disk limits. Otherwise we can overflow i_clusters when
601 * an extent start is at the max offset.
602 */
603 return (((unsigned long long)bytes) << bitshift) - trim;
604 }
605
606 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
607 {
608 int incompat_features;
609 int ret = 0;
610 struct mount_options parsed_options;
611 struct ocfs2_super *osb = OCFS2_SB(sb);
612 u32 tmp;
613
614 sync_filesystem(sb);
615
616 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
617 !ocfs2_check_set_options(sb, &parsed_options)) {
618 ret = -EINVAL;
619 goto out;
620 }
621
622 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
623 OCFS2_MOUNT_HB_NONE;
624 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
625 ret = -EINVAL;
626 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
627 goto out;
628 }
629
630 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
631 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
632 ret = -EINVAL;
633 mlog(ML_ERROR, "Cannot change data mode on remount\n");
634 goto out;
635 }
636
637 /* Probably don't want this on remount; it might
638 * mess with other nodes */
639 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
640 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
641 ret = -EINVAL;
642 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
643 goto out;
644 }
645
646 /* We're going to/from readonly mode. */
647 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
648 /* Disable quota accounting before remounting RO */
649 if (*flags & SB_RDONLY) {
650 ret = ocfs2_susp_quotas(osb, 0);
651 if (ret < 0)
652 goto out;
653 }
654 /* Lock here so the check of HARD_RO and the potential
655 * setting of SOFT_RO is atomic. */
656 spin_lock(&osb->osb_lock);
657 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
658 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
659 ret = -EROFS;
660 goto unlock_osb;
661 }
662
663 if (*flags & SB_RDONLY) {
664 sb->s_flags |= SB_RDONLY;
665 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
666 } else {
667 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
668 mlog(ML_ERROR, "Cannot remount RDWR "
669 "filesystem due to previous errors.\n");
670 ret = -EROFS;
671 goto unlock_osb;
672 }
673 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
674 if (incompat_features) {
675 mlog(ML_ERROR, "Cannot remount RDWR because "
676 "of unsupported optional features "
677 "(%x).\n", incompat_features);
678 ret = -EINVAL;
679 goto unlock_osb;
680 }
681 sb->s_flags &= ~SB_RDONLY;
682 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
683 }
684 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
685 unlock_osb:
686 spin_unlock(&osb->osb_lock);
687 /* Enable quota accounting after remounting RW */
688 if (!ret && !(*flags & SB_RDONLY)) {
689 if (sb_any_quota_suspended(sb))
690 ret = ocfs2_susp_quotas(osb, 1);
691 else
692 ret = ocfs2_enable_quotas(osb);
693 if (ret < 0) {
694 /* Return back changes... */
695 spin_lock(&osb->osb_lock);
696 sb->s_flags |= SB_RDONLY;
697 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
698 spin_unlock(&osb->osb_lock);
699 goto out;
700 }
701 }
702 }
703
704 if (!ret) {
705 /* Only save off the new mount options in case of a successful
706 * remount. */
707 osb->s_mount_opt = parsed_options.mount_opt;
708 osb->s_atime_quantum = parsed_options.atime_quantum;
709 osb->preferred_slot = parsed_options.slot;
710 if (parsed_options.commit_interval)
711 osb->osb_commit_interval = parsed_options.commit_interval;
712
713 if (!ocfs2_is_hard_readonly(osb))
714 ocfs2_set_journal_params(osb);
715
716 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
717 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
718 SB_POSIXACL : 0);
719 }
720 out:
721 return ret;
722 }
723
724 static int ocfs2_sb_probe(struct super_block *sb,
725 struct buffer_head **bh,
726 int *sector_size,
727 struct ocfs2_blockcheck_stats *stats)
728 {
729 int status, tmpstat;
730 struct ocfs1_vol_disk_hdr *hdr;
731 struct ocfs2_dinode *di;
732 int blksize;
733
734 *bh = NULL;
735
736 /* may be > 512 */
737 *sector_size = bdev_logical_block_size(sb->s_bdev);
738 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
739 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
740 *sector_size, OCFS2_MAX_BLOCKSIZE);
741 status = -EINVAL;
742 goto bail;
743 }
744
745 /* Can this really happen? */
746 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
747 *sector_size = OCFS2_MIN_BLOCKSIZE;
748
749 /* check block zero for old format */
750 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
751 if (status < 0) {
752 mlog_errno(status);
753 goto bail;
754 }
755 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
756 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
757 mlog(ML_ERROR, "incompatible version: %u.%u\n",
758 hdr->major_version, hdr->minor_version);
759 status = -EINVAL;
760 }
761 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
762 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
763 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
764 hdr->signature);
765 status = -EINVAL;
766 }
767 brelse(*bh);
768 *bh = NULL;
769 if (status < 0) {
770 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
771 "upgraded before mounting with ocfs v2\n");
772 goto bail;
773 }
774
775 /*
776 * Now check at magic offset for 512, 1024, 2048, 4096
777 * blocksizes. 4096 is the maximum blocksize because it is
778 * the minimum clustersize.
779 */
780 status = -EINVAL;
781 for (blksize = *sector_size;
782 blksize <= OCFS2_MAX_BLOCKSIZE;
783 blksize <<= 1) {
784 tmpstat = ocfs2_get_sector(sb, bh,
785 OCFS2_SUPER_BLOCK_BLKNO,
786 blksize);
787 if (tmpstat < 0) {
788 status = tmpstat;
789 mlog_errno(status);
790 break;
791 }
792 di = (struct ocfs2_dinode *) (*bh)->b_data;
793 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
794 spin_lock_init(&stats->b_lock);
795 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
796 if (tmpstat < 0) {
797 brelse(*bh);
798 *bh = NULL;
799 }
800 if (tmpstat != -EAGAIN) {
801 status = tmpstat;
802 break;
803 }
804 }
805
806 bail:
807 return status;
808 }
809
810 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
811 {
812 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
813
814 if (osb->s_mount_opt & hb_enabled) {
815 if (ocfs2_mount_local(osb)) {
816 mlog(ML_ERROR, "Cannot heartbeat on a locally "
817 "mounted device.\n");
818 return -EINVAL;
819 }
820 if (ocfs2_userspace_stack(osb)) {
821 mlog(ML_ERROR, "Userspace stack expected, but "
822 "o2cb heartbeat arguments passed to mount\n");
823 return -EINVAL;
824 }
825 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
826 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
827 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
828 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
829 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
830 return -EINVAL;
831 }
832 }
833
834 if (!(osb->s_mount_opt & hb_enabled)) {
835 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
836 !ocfs2_userspace_stack(osb)) {
837 mlog(ML_ERROR, "Heartbeat has to be started to mount "
838 "a read-write clustered device.\n");
839 return -EINVAL;
840 }
841 }
842
843 return 0;
844 }
845
846 /*
847 * If we're using a userspace stack, mount should have passed
848 * a name that matches the disk. If not, mount should not
849 * have passed a stack.
850 */
851 static 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
875 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
876 {
877 int type;
878 struct super_block *sb = osb->sb;
879 unsigned int feature[OCFS2_MAXQUOTAS] = {
880 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
881 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
882 int status = 0;
883
884 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
885 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
886 continue;
887 if (unsuspend)
888 status = dquot_resume(sb, type);
889 else {
890 struct ocfs2_mem_dqinfo *oinfo;
891
892 /* Cancel periodic syncing before suspending */
893 oinfo = sb_dqinfo(sb, type)->dqi_priv;
894 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
895 status = dquot_suspend(sb, type);
896 }
897 if (status < 0)
898 break;
899 }
900 if (status < 0)
901 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
902 "remount (error = %d).\n", status);
903 return status;
904 }
905
906 static 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;
938 out_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
946 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
947 {
948 int type;
949 struct inode *inode;
950 struct super_block *sb = osb->sb;
951 struct ocfs2_mem_dqinfo *oinfo;
952
953 /* We mostly ignore errors in this function because there's not much
954 * we can do when we see them */
955 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
956 if (!sb_has_quota_loaded(sb, type))
957 continue;
958 oinfo = sb_dqinfo(sb, type)->dqi_priv;
959 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
960 inode = igrab(sb->s_dquot.files[type]);
961 /* Turn off quotas. This will remove all dquot structures from
962 * memory and so they will be automatically synced to global
963 * quota files */
964 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
965 DQUOT_LIMITS_ENABLED);
966 if (!inode)
967 continue;
968 iput(inode);
969 }
970 }
971
972 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
973 {
974 struct dentry *root;
975 int status, sector_size;
976 struct mount_options parsed_options;
977 struct inode *inode = NULL;
978 struct ocfs2_super *osb = NULL;
979 struct buffer_head *bh = NULL;
980 char nodestr[12];
981 struct ocfs2_blockcheck_stats stats;
982
983 trace_ocfs2_fill_super(sb, data, silent);
984
985 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
986 status = -EINVAL;
987 goto read_super_error;
988 }
989
990 /* probe for superblock */
991 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
992 if (status < 0) {
993 mlog(ML_ERROR, "superblock probe failed!\n");
994 goto read_super_error;
995 }
996
997 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
998 osb = OCFS2_SB(sb);
999 if (status < 0) {
1000 mlog_errno(status);
1001 goto read_super_error;
1002 }
1003 brelse(bh);
1004 bh = NULL;
1005
1006 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1007 status = -EINVAL;
1008 goto read_super_error;
1009 }
1010 osb->s_mount_opt = parsed_options.mount_opt;
1011 osb->s_atime_quantum = parsed_options.atime_quantum;
1012 osb->preferred_slot = parsed_options.slot;
1013 osb->osb_commit_interval = parsed_options.commit_interval;
1014
1015 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1016 osb->osb_resv_level = parsed_options.resv_level;
1017 osb->osb_dir_resv_level = parsed_options.resv_level;
1018 if (parsed_options.dir_resv_level == -1)
1019 osb->osb_dir_resv_level = parsed_options.resv_level;
1020 else
1021 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1022
1023 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1024 if (status)
1025 goto read_super_error;
1026
1027 sb->s_magic = OCFS2_SUPER_MAGIC;
1028
1029 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1030 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1031
1032 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1033 * heartbeat=none */
1034 if (bdev_read_only(sb->s_bdev)) {
1035 if (!sb_rdonly(sb)) {
1036 status = -EACCES;
1037 mlog(ML_ERROR, "Readonly device detected but readonly "
1038 "mount was not specified.\n");
1039 goto read_super_error;
1040 }
1041
1042 /* You should not be able to start a local heartbeat
1043 * on a readonly device. */
1044 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1045 status = -EROFS;
1046 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1047 "device.\n");
1048 goto read_super_error;
1049 }
1050
1051 status = ocfs2_check_journals_nolocks(osb);
1052 if (status < 0) {
1053 if (status == -EROFS)
1054 mlog(ML_ERROR, "Recovery required on readonly "
1055 "file system, but write access is "
1056 "unavailable.\n");
1057 else
1058 mlog_errno(status);
1059 goto read_super_error;
1060 }
1061
1062 ocfs2_set_ro_flag(osb, 1);
1063
1064 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1065 "Cluster services will not be used for this mount. "
1066 "Recovery will be skipped.\n", osb->dev_str);
1067 }
1068
1069 if (!ocfs2_is_hard_readonly(osb)) {
1070 if (sb_rdonly(sb))
1071 ocfs2_set_ro_flag(osb, 0);
1072 }
1073
1074 status = ocfs2_verify_heartbeat(osb);
1075 if (status < 0) {
1076 mlog_errno(status);
1077 goto read_super_error;
1078 }
1079
1080 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1081 ocfs2_debugfs_root);
1082 if (!osb->osb_debug_root) {
1083 status = -EINVAL;
1084 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1085 goto read_super_error;
1086 }
1087
1088 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1089 osb->osb_debug_root,
1090 osb,
1091 &ocfs2_osb_debug_fops);
1092 if (!osb->osb_ctxt) {
1093 status = -EINVAL;
1094 mlog_errno(status);
1095 goto read_super_error;
1096 }
1097
1098 if (ocfs2_meta_ecc(osb)) {
1099 status = ocfs2_blockcheck_stats_debugfs_install(
1100 &osb->osb_ecc_stats,
1101 osb->osb_debug_root);
1102 if (status) {
1103 mlog(ML_ERROR,
1104 "Unable to create blockcheck statistics "
1105 "files\n");
1106 goto read_super_error;
1107 }
1108 }
1109
1110 status = ocfs2_mount_volume(sb);
1111 if (status < 0)
1112 goto read_super_error;
1113
1114 if (osb->root_inode)
1115 inode = igrab(osb->root_inode);
1116
1117 if (!inode) {
1118 status = -EIO;
1119 mlog_errno(status);
1120 goto read_super_error;
1121 }
1122
1123 root = d_make_root(inode);
1124 if (!root) {
1125 status = -ENOMEM;
1126 mlog_errno(status);
1127 goto read_super_error;
1128 }
1129
1130 sb->s_root = root;
1131
1132 ocfs2_complete_mount_recovery(osb);
1133
1134 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1135 &ocfs2_kset->kobj);
1136 if (!osb->osb_dev_kset) {
1137 status = -ENOMEM;
1138 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1139 goto read_super_error;
1140 }
1141
1142 /* Create filecheck sysfs related directories/files at
1143 * /sys/fs/ocfs2/<devname>/filecheck */
1144 if (ocfs2_filecheck_create_sysfs(osb)) {
1145 status = -ENOMEM;
1146 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1147 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1148 goto read_super_error;
1149 }
1150
1151 if (ocfs2_mount_local(osb))
1152 snprintf(nodestr, sizeof(nodestr), "local");
1153 else
1154 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1155
1156 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1157 "with %s data mode.\n",
1158 osb->dev_str, nodestr, osb->slot_num,
1159 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1160 "ordered");
1161
1162 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1163 wake_up(&osb->osb_mount_event);
1164
1165 /* Now we can initialize quotas because we can afford to wait
1166 * for cluster locks recovery now. That also means that truncation
1167 * log recovery can happen but that waits for proper quota setup */
1168 if (!sb_rdonly(sb)) {
1169 status = ocfs2_enable_quotas(osb);
1170 if (status < 0) {
1171 /* We have to err-out specially here because
1172 * s_root is already set */
1173 mlog_errno(status);
1174 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1175 wake_up(&osb->osb_mount_event);
1176 return status;
1177 }
1178 }
1179
1180 ocfs2_complete_quota_recovery(osb);
1181
1182 /* Now we wake up again for processes waiting for quotas */
1183 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1184 wake_up(&osb->osb_mount_event);
1185
1186 /* Start this when the mount is almost sure of being successful */
1187 ocfs2_orphan_scan_start(osb);
1188
1189 return status;
1190
1191 read_super_error:
1192 brelse(bh);
1193
1194 if (status)
1195 mlog_errno(status);
1196
1197 if (osb) {
1198 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1199 wake_up(&osb->osb_mount_event);
1200 ocfs2_dismount_volume(sb, 1);
1201 }
1202
1203 return status;
1204 }
1205
1206 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1207 int flags,
1208 const char *dev_name,
1209 void *data)
1210 {
1211 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1212 }
1213
1214 static struct file_system_type ocfs2_fs_type = {
1215 .owner = THIS_MODULE,
1216 .name = "ocfs2",
1217 .mount = ocfs2_mount,
1218 .kill_sb = kill_block_super,
1219 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1220 .next = NULL
1221 };
1222 MODULE_ALIAS_FS("ocfs2");
1223
1224 static int ocfs2_check_set_options(struct super_block *sb,
1225 struct mount_options *options)
1226 {
1227 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1228 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1229 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1230 mlog(ML_ERROR, "User quotas were requested, but this "
1231 "filesystem does not have the feature enabled.\n");
1232 return 0;
1233 }
1234 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1235 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1236 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1237 mlog(ML_ERROR, "Group quotas were requested, but this "
1238 "filesystem does not have the feature enabled.\n");
1239 return 0;
1240 }
1241 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1242 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1243 mlog(ML_ERROR, "ACL support requested but extended attributes "
1244 "feature is not enabled\n");
1245 return 0;
1246 }
1247 /* No ACL setting specified? Use XATTR feature... */
1248 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1249 OCFS2_MOUNT_NO_POSIX_ACL))) {
1250 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1251 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1252 else
1253 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1254 }
1255 return 1;
1256 }
1257
1258 static int ocfs2_parse_options(struct super_block *sb,
1259 char *options,
1260 struct mount_options *mopt,
1261 int is_remount)
1262 {
1263 int status, user_stack = 0;
1264 char *p;
1265 u32 tmp;
1266 int token, option;
1267 substring_t args[MAX_OPT_ARGS];
1268
1269 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1270
1271 mopt->commit_interval = 0;
1272 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1273 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1274 mopt->slot = OCFS2_INVALID_SLOT;
1275 mopt->localalloc_opt = -1;
1276 mopt->cluster_stack[0] = '\0';
1277 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1278 mopt->dir_resv_level = -1;
1279
1280 if (!options) {
1281 status = 1;
1282 goto bail;
1283 }
1284
1285 while ((p = strsep(&options, ",")) != NULL) {
1286 if (!*p)
1287 continue;
1288
1289 token = match_token(p, tokens, args);
1290 switch (token) {
1291 case Opt_hb_local:
1292 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1293 break;
1294 case Opt_hb_none:
1295 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1296 break;
1297 case Opt_hb_global:
1298 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1299 break;
1300 case Opt_barrier:
1301 if (match_int(&args[0], &option)) {
1302 status = 0;
1303 goto bail;
1304 }
1305 if (option)
1306 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1307 else
1308 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1309 break;
1310 case Opt_intr:
1311 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1312 break;
1313 case Opt_nointr:
1314 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1315 break;
1316 case Opt_err_panic:
1317 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1318 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1319 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1320 break;
1321 case Opt_err_ro:
1322 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1323 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1324 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1325 break;
1326 case Opt_err_cont:
1327 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1328 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1329 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1330 break;
1331 case Opt_data_ordered:
1332 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1333 break;
1334 case Opt_data_writeback:
1335 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1336 break;
1337 case Opt_user_xattr:
1338 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1339 break;
1340 case Opt_nouser_xattr:
1341 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1342 break;
1343 case Opt_atime_quantum:
1344 if (match_int(&args[0], &option)) {
1345 status = 0;
1346 goto bail;
1347 }
1348 if (option >= 0)
1349 mopt->atime_quantum = option;
1350 break;
1351 case Opt_slot:
1352 if (match_int(&args[0], &option)) {
1353 status = 0;
1354 goto bail;
1355 }
1356 if (option)
1357 mopt->slot = (s16)option;
1358 break;
1359 case Opt_commit:
1360 if (match_int(&args[0], &option)) {
1361 status = 0;
1362 goto bail;
1363 }
1364 if (option < 0)
1365 return 0;
1366 if (option == 0)
1367 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1368 mopt->commit_interval = HZ * option;
1369 break;
1370 case Opt_localalloc:
1371 if (match_int(&args[0], &option)) {
1372 status = 0;
1373 goto bail;
1374 }
1375 if (option >= 0)
1376 mopt->localalloc_opt = option;
1377 break;
1378 case Opt_localflocks:
1379 /*
1380 * Changing this during remount could race
1381 * flock() requests, or "unbalance" existing
1382 * ones (e.g., a lock is taken in one mode but
1383 * dropped in the other). If users care enough
1384 * to flip locking modes during remount, we
1385 * could add a "local" flag to individual
1386 * flock structures for proper tracking of
1387 * state.
1388 */
1389 if (!is_remount)
1390 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1391 break;
1392 case Opt_stack:
1393 /* Check both that the option we were passed
1394 * is of the right length and that it is a proper
1395 * string of the right length.
1396 */
1397 if (((args[0].to - args[0].from) !=
1398 OCFS2_STACK_LABEL_LEN) ||
1399 (strnlen(args[0].from,
1400 OCFS2_STACK_LABEL_LEN) !=
1401 OCFS2_STACK_LABEL_LEN)) {
1402 mlog(ML_ERROR,
1403 "Invalid cluster_stack option\n");
1404 status = 0;
1405 goto bail;
1406 }
1407 memcpy(mopt->cluster_stack, args[0].from,
1408 OCFS2_STACK_LABEL_LEN);
1409 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1410 /*
1411 * Open code the memcmp here as we don't have
1412 * an osb to pass to
1413 * ocfs2_userspace_stack().
1414 */
1415 if (memcmp(mopt->cluster_stack,
1416 OCFS2_CLASSIC_CLUSTER_STACK,
1417 OCFS2_STACK_LABEL_LEN))
1418 user_stack = 1;
1419 break;
1420 case Opt_inode64:
1421 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1422 break;
1423 case Opt_usrquota:
1424 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1425 break;
1426 case Opt_grpquota:
1427 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1428 break;
1429 case Opt_coherency_buffered:
1430 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1431 break;
1432 case Opt_coherency_full:
1433 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1434 break;
1435 case Opt_acl:
1436 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1437 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1438 break;
1439 case Opt_noacl:
1440 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1441 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1442 break;
1443 case Opt_resv_level:
1444 if (is_remount)
1445 break;
1446 if (match_int(&args[0], &option)) {
1447 status = 0;
1448 goto bail;
1449 }
1450 if (option >= OCFS2_MIN_RESV_LEVEL &&
1451 option < OCFS2_MAX_RESV_LEVEL)
1452 mopt->resv_level = option;
1453 break;
1454 case Opt_dir_resv_level:
1455 if (is_remount)
1456 break;
1457 if (match_int(&args[0], &option)) {
1458 status = 0;
1459 goto bail;
1460 }
1461 if (option >= OCFS2_MIN_RESV_LEVEL &&
1462 option < OCFS2_MAX_RESV_LEVEL)
1463 mopt->dir_resv_level = option;
1464 break;
1465 case Opt_journal_async_commit:
1466 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1467 break;
1468 default:
1469 mlog(ML_ERROR,
1470 "Unrecognized mount option \"%s\" "
1471 "or missing value\n", p);
1472 status = 0;
1473 goto bail;
1474 }
1475 }
1476
1477 if (user_stack == 0) {
1478 /* Ensure only one heartbeat mode */
1479 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1480 OCFS2_MOUNT_HB_GLOBAL |
1481 OCFS2_MOUNT_HB_NONE);
1482 if (hweight32(tmp) != 1) {
1483 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1484 status = 0;
1485 goto bail;
1486 }
1487 }
1488
1489 status = 1;
1490
1491 bail:
1492 return status;
1493 }
1494
1495 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1496 {
1497 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1498 unsigned long opts = osb->s_mount_opt;
1499 unsigned int local_alloc_megs;
1500
1501 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1502 seq_printf(s, ",_netdev");
1503 if (opts & OCFS2_MOUNT_HB_LOCAL)
1504 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1505 else
1506 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1507 } else
1508 seq_printf(s, ",%s", OCFS2_HB_NONE);
1509
1510 if (opts & OCFS2_MOUNT_NOINTR)
1511 seq_printf(s, ",nointr");
1512
1513 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1514 seq_printf(s, ",data=writeback");
1515 else
1516 seq_printf(s, ",data=ordered");
1517
1518 if (opts & OCFS2_MOUNT_BARRIER)
1519 seq_printf(s, ",barrier=1");
1520
1521 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1522 seq_printf(s, ",errors=panic");
1523 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1524 seq_printf(s, ",errors=continue");
1525 else
1526 seq_printf(s, ",errors=remount-ro");
1527
1528 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1529 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1530
1531 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1532
1533 if (osb->osb_commit_interval)
1534 seq_printf(s, ",commit=%u",
1535 (unsigned) (osb->osb_commit_interval / HZ));
1536
1537 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1538 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1539 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1540
1541 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1542 seq_printf(s, ",localflocks,");
1543
1544 if (osb->osb_cluster_stack[0])
1545 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1546 OCFS2_STACK_LABEL_LEN);
1547 if (opts & OCFS2_MOUNT_USRQUOTA)
1548 seq_printf(s, ",usrquota");
1549 if (opts & OCFS2_MOUNT_GRPQUOTA)
1550 seq_printf(s, ",grpquota");
1551
1552 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1553 seq_printf(s, ",coherency=buffered");
1554 else
1555 seq_printf(s, ",coherency=full");
1556
1557 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1558 seq_printf(s, ",nouser_xattr");
1559 else
1560 seq_printf(s, ",user_xattr");
1561
1562 if (opts & OCFS2_MOUNT_INODE64)
1563 seq_printf(s, ",inode64");
1564
1565 if (opts & OCFS2_MOUNT_POSIX_ACL)
1566 seq_printf(s, ",acl");
1567 else
1568 seq_printf(s, ",noacl");
1569
1570 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1571 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1572
1573 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1574 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1575
1576 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1577 seq_printf(s, ",journal_async_commit");
1578
1579 return 0;
1580 }
1581
1582 static int __init ocfs2_init(void)
1583 {
1584 int status;
1585
1586 status = init_ocfs2_uptodate_cache();
1587 if (status < 0)
1588 goto out1;
1589
1590 status = ocfs2_initialize_mem_caches();
1591 if (status < 0)
1592 goto out2;
1593
1594 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1595 if (!ocfs2_debugfs_root) {
1596 status = -ENOMEM;
1597 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1598 goto out3;
1599 }
1600
1601 ocfs2_set_locking_protocol();
1602
1603 status = register_quota_format(&ocfs2_quota_format);
1604 if (status < 0)
1605 goto out3;
1606 status = register_filesystem(&ocfs2_fs_type);
1607 if (!status)
1608 return 0;
1609
1610 unregister_quota_format(&ocfs2_quota_format);
1611 out3:
1612 debugfs_remove(ocfs2_debugfs_root);
1613 ocfs2_free_mem_caches();
1614 out2:
1615 exit_ocfs2_uptodate_cache();
1616 out1:
1617 mlog_errno(status);
1618 return status;
1619 }
1620
1621 static void __exit ocfs2_exit(void)
1622 {
1623 unregister_quota_format(&ocfs2_quota_format);
1624
1625 debugfs_remove(ocfs2_debugfs_root);
1626
1627 ocfs2_free_mem_caches();
1628
1629 unregister_filesystem(&ocfs2_fs_type);
1630
1631 exit_ocfs2_uptodate_cache();
1632 }
1633
1634 static void ocfs2_put_super(struct super_block *sb)
1635 {
1636 trace_ocfs2_put_super(sb);
1637
1638 ocfs2_sync_blockdev(sb);
1639 ocfs2_dismount_volume(sb, 0);
1640 }
1641
1642 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1643 {
1644 struct ocfs2_super *osb;
1645 u32 numbits, freebits;
1646 int status;
1647 struct ocfs2_dinode *bm_lock;
1648 struct buffer_head *bh = NULL;
1649 struct inode *inode = NULL;
1650
1651 trace_ocfs2_statfs(dentry->d_sb, buf);
1652
1653 osb = OCFS2_SB(dentry->d_sb);
1654
1655 inode = ocfs2_get_system_file_inode(osb,
1656 GLOBAL_BITMAP_SYSTEM_INODE,
1657 OCFS2_INVALID_SLOT);
1658 if (!inode) {
1659 mlog(ML_ERROR, "failed to get bitmap inode\n");
1660 status = -EIO;
1661 goto bail;
1662 }
1663
1664 status = ocfs2_inode_lock(inode, &bh, 0);
1665 if (status < 0) {
1666 mlog_errno(status);
1667 goto bail;
1668 }
1669
1670 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1671
1672 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1673 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1674
1675 buf->f_type = OCFS2_SUPER_MAGIC;
1676 buf->f_bsize = dentry->d_sb->s_blocksize;
1677 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1678 buf->f_blocks = ((sector_t) numbits) *
1679 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1680 buf->f_bfree = ((sector_t) freebits) *
1681 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1682 buf->f_bavail = buf->f_bfree;
1683 buf->f_files = numbits;
1684 buf->f_ffree = freebits;
1685 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1686 & 0xFFFFFFFFUL;
1687 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1688 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1689
1690 brelse(bh);
1691
1692 ocfs2_inode_unlock(inode, 0);
1693 status = 0;
1694 bail:
1695 iput(inode);
1696
1697 if (status)
1698 mlog_errno(status);
1699
1700 return status;
1701 }
1702
1703 static void ocfs2_inode_init_once(void *data)
1704 {
1705 struct ocfs2_inode_info *oi = data;
1706
1707 oi->ip_flags = 0;
1708 oi->ip_open_count = 0;
1709 spin_lock_init(&oi->ip_lock);
1710 ocfs2_extent_map_init(&oi->vfs_inode);
1711 INIT_LIST_HEAD(&oi->ip_io_markers);
1712 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1713 oi->ip_dir_start_lookup = 0;
1714 init_rwsem(&oi->ip_alloc_sem);
1715 init_rwsem(&oi->ip_xattr_sem);
1716 mutex_init(&oi->ip_io_mutex);
1717
1718 oi->ip_blkno = 0ULL;
1719 oi->ip_clusters = 0;
1720
1721 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1722
1723 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1724 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1725 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1726
1727 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1728 &ocfs2_inode_caching_ops);
1729
1730 inode_init_once(&oi->vfs_inode);
1731 }
1732
1733 static int ocfs2_initialize_mem_caches(void)
1734 {
1735 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1736 sizeof(struct ocfs2_inode_info),
1737 0,
1738 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1739 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1740 ocfs2_inode_init_once);
1741 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1742 sizeof(struct ocfs2_dquot),
1743 0,
1744 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1745 SLAB_MEM_SPREAD),
1746 NULL);
1747 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1748 sizeof(struct ocfs2_quota_chunk),
1749 0,
1750 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1751 NULL);
1752 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1753 !ocfs2_qf_chunk_cachep) {
1754 kmem_cache_destroy(ocfs2_inode_cachep);
1755 kmem_cache_destroy(ocfs2_dquot_cachep);
1756 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1757 return -ENOMEM;
1758 }
1759
1760 return 0;
1761 }
1762
1763 static void ocfs2_free_mem_caches(void)
1764 {
1765 /*
1766 * Make sure all delayed rcu free inodes are flushed before we
1767 * destroy cache.
1768 */
1769 rcu_barrier();
1770 kmem_cache_destroy(ocfs2_inode_cachep);
1771 ocfs2_inode_cachep = NULL;
1772
1773 kmem_cache_destroy(ocfs2_dquot_cachep);
1774 ocfs2_dquot_cachep = NULL;
1775
1776 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1777 ocfs2_qf_chunk_cachep = NULL;
1778 }
1779
1780 static int ocfs2_get_sector(struct super_block *sb,
1781 struct buffer_head **bh,
1782 int block,
1783 int sect_size)
1784 {
1785 if (!sb_set_blocksize(sb, sect_size)) {
1786 mlog(ML_ERROR, "unable to set blocksize\n");
1787 return -EIO;
1788 }
1789
1790 *bh = sb_getblk(sb, block);
1791 if (!*bh) {
1792 mlog_errno(-ENOMEM);
1793 return -ENOMEM;
1794 }
1795 lock_buffer(*bh);
1796 if (!buffer_dirty(*bh))
1797 clear_buffer_uptodate(*bh);
1798 unlock_buffer(*bh);
1799 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1800 wait_on_buffer(*bh);
1801 if (!buffer_uptodate(*bh)) {
1802 mlog_errno(-EIO);
1803 brelse(*bh);
1804 *bh = NULL;
1805 return -EIO;
1806 }
1807
1808 return 0;
1809 }
1810
1811 static int ocfs2_mount_volume(struct super_block *sb)
1812 {
1813 int status = 0;
1814 int unlock_super = 0;
1815 struct ocfs2_super *osb = OCFS2_SB(sb);
1816
1817 if (ocfs2_is_hard_readonly(osb))
1818 goto leave;
1819
1820 mutex_init(&osb->obs_trim_fs_mutex);
1821
1822 status = ocfs2_dlm_init(osb);
1823 if (status < 0) {
1824 mlog_errno(status);
1825 if (status == -EBADR && ocfs2_userspace_stack(osb))
1826 mlog(ML_ERROR, "couldn't mount because cluster name on"
1827 " disk does not match the running cluster name.\n");
1828 goto leave;
1829 }
1830
1831 status = ocfs2_super_lock(osb, 1);
1832 if (status < 0) {
1833 mlog_errno(status);
1834 goto leave;
1835 }
1836 unlock_super = 1;
1837
1838 /* This will load up the node map and add ourselves to it. */
1839 status = ocfs2_find_slot(osb);
1840 if (status < 0) {
1841 mlog_errno(status);
1842 goto leave;
1843 }
1844
1845 /* load all node-local system inodes */
1846 status = ocfs2_init_local_system_inodes(osb);
1847 if (status < 0) {
1848 mlog_errno(status);
1849 goto leave;
1850 }
1851
1852 status = ocfs2_check_volume(osb);
1853 if (status < 0) {
1854 mlog_errno(status);
1855 goto leave;
1856 }
1857
1858 status = ocfs2_truncate_log_init(osb);
1859 if (status < 0)
1860 mlog_errno(status);
1861
1862 leave:
1863 if (unlock_super)
1864 ocfs2_super_unlock(osb, 1);
1865
1866 return status;
1867 }
1868
1869 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1870 {
1871 int tmp, hangup_needed = 0;
1872 struct ocfs2_super *osb = NULL;
1873 char nodestr[12];
1874
1875 trace_ocfs2_dismount_volume(sb);
1876
1877 BUG_ON(!sb);
1878 osb = OCFS2_SB(sb);
1879 BUG_ON(!osb);
1880
1881 /* Remove file check sysfs related directores/files,
1882 * and wait for the pending file check operations */
1883 ocfs2_filecheck_remove_sysfs(osb);
1884
1885 kset_unregister(osb->osb_dev_kset);
1886
1887 debugfs_remove(osb->osb_ctxt);
1888
1889 /* Orphan scan should be stopped as early as possible */
1890 ocfs2_orphan_scan_stop(osb);
1891
1892 ocfs2_disable_quotas(osb);
1893
1894 /* All dquots should be freed by now */
1895 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1896 /* Wait for worker to be done with the work structure in osb */
1897 cancel_work_sync(&osb->dquot_drop_work);
1898
1899 ocfs2_shutdown_local_alloc(osb);
1900
1901 ocfs2_truncate_log_shutdown(osb);
1902
1903 /* This will disable recovery and flush any recovery work. */
1904 ocfs2_recovery_exit(osb);
1905
1906 ocfs2_journal_shutdown(osb);
1907
1908 ocfs2_sync_blockdev(sb);
1909
1910 ocfs2_purge_refcount_trees(osb);
1911
1912 /* No cluster connection means we've failed during mount, so skip
1913 * all the steps which depended on that to complete. */
1914 if (osb->cconn) {
1915 tmp = ocfs2_super_lock(osb, 1);
1916 if (tmp < 0) {
1917 mlog_errno(tmp);
1918 return;
1919 }
1920 }
1921
1922 if (osb->slot_num != OCFS2_INVALID_SLOT)
1923 ocfs2_put_slot(osb);
1924
1925 if (osb->cconn)
1926 ocfs2_super_unlock(osb, 1);
1927
1928 ocfs2_release_system_inodes(osb);
1929
1930 /*
1931 * If we're dismounting due to mount error, mount.ocfs2 will clean
1932 * up heartbeat. If we're a local mount, there is no heartbeat.
1933 * If we failed before we got a uuid_str yet, we can't stop
1934 * heartbeat. Otherwise, do it.
1935 */
1936 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1937 !ocfs2_is_hard_readonly(osb))
1938 hangup_needed = 1;
1939
1940 if (osb->cconn)
1941 ocfs2_dlm_shutdown(osb, hangup_needed);
1942
1943 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1944 debugfs_remove(osb->osb_debug_root);
1945
1946 if (hangup_needed)
1947 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1948
1949 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1950
1951 if (ocfs2_mount_local(osb))
1952 snprintf(nodestr, sizeof(nodestr), "local");
1953 else
1954 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1955
1956 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1957 osb->dev_str, nodestr);
1958
1959 ocfs2_delete_osb(osb);
1960 kfree(osb);
1961 sb->s_dev = 0;
1962 sb->s_fs_info = NULL;
1963 }
1964
1965 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1966 unsigned uuid_bytes)
1967 {
1968 int i, ret;
1969 char *ptr;
1970
1971 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1972
1973 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1974 if (osb->uuid_str == NULL)
1975 return -ENOMEM;
1976
1977 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1978 /* print with null */
1979 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1980 if (ret != 2) /* drop super cleans up */
1981 return -EINVAL;
1982 /* then only advance past the last char */
1983 ptr += 2;
1984 }
1985
1986 return 0;
1987 }
1988
1989 /* Make sure entire volume is addressable by our journal. Requires
1990 osb_clusters_at_boot to be valid and for the journal to have been
1991 initialized by ocfs2_journal_init(). */
1992 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1993 {
1994 int status = 0;
1995 u64 max_block =
1996 ocfs2_clusters_to_blocks(osb->sb,
1997 osb->osb_clusters_at_boot) - 1;
1998
1999 /* 32-bit block number is always OK. */
2000 if (max_block <= (u32)~0ULL)
2001 goto out;
2002
2003 /* Volume is "huge", so see if our journal is new enough to
2004 support it. */
2005 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2006 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2007 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2008 JBD2_FEATURE_INCOMPAT_64BIT))) {
2009 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2010 "Enable the 'block64' journal option with tunefs.ocfs2");
2011 status = -EFBIG;
2012 goto out;
2013 }
2014
2015 out:
2016 return status;
2017 }
2018
2019 static int ocfs2_initialize_super(struct super_block *sb,
2020 struct buffer_head *bh,
2021 int sector_size,
2022 struct ocfs2_blockcheck_stats *stats)
2023 {
2024 int status;
2025 int i, cbits, bbits;
2026 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2027 struct inode *inode = NULL;
2028 struct ocfs2_journal *journal;
2029 struct ocfs2_super *osb;
2030 u64 total_blocks;
2031
2032 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2033 if (!osb) {
2034 status = -ENOMEM;
2035 mlog_errno(status);
2036 goto bail;
2037 }
2038
2039 sb->s_fs_info = osb;
2040 sb->s_op = &ocfs2_sops;
2041 sb->s_d_op = &ocfs2_dentry_ops;
2042 sb->s_export_op = &ocfs2_export_ops;
2043 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2044 sb->dq_op = &ocfs2_quota_operations;
2045 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2046 sb->s_xattr = ocfs2_xattr_handlers;
2047 sb->s_time_gran = 1;
2048 sb->s_flags |= SB_NOATIME;
2049 /* this is needed to support O_LARGEFILE */
2050 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2051 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2052 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2053 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2054 sizeof(di->id2.i_super.s_uuid));
2055
2056 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2057
2058 for (i = 0; i < 3; i++)
2059 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2060 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2061
2062 osb->sb = sb;
2063 osb->s_sectsize_bits = blksize_bits(sector_size);
2064 BUG_ON(!osb->s_sectsize_bits);
2065
2066 spin_lock_init(&osb->dc_task_lock);
2067 init_waitqueue_head(&osb->dc_event);
2068 osb->dc_work_sequence = 0;
2069 osb->dc_wake_sequence = 0;
2070 INIT_LIST_HEAD(&osb->blocked_lock_list);
2071 osb->blocked_lock_count = 0;
2072 spin_lock_init(&osb->osb_lock);
2073 spin_lock_init(&osb->osb_xattr_lock);
2074 ocfs2_init_steal_slots(osb);
2075
2076 mutex_init(&osb->system_file_mutex);
2077
2078 atomic_set(&osb->alloc_stats.moves, 0);
2079 atomic_set(&osb->alloc_stats.local_data, 0);
2080 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2081 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2082 atomic_set(&osb->alloc_stats.bg_extends, 0);
2083
2084 /* Copy the blockcheck stats from the superblock probe */
2085 osb->osb_ecc_stats = *stats;
2086
2087 ocfs2_init_node_maps(osb);
2088
2089 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2090 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2091
2092 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2093 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2094 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2095 osb->max_slots);
2096 status = -EINVAL;
2097 goto bail;
2098 }
2099
2100 ocfs2_orphan_scan_init(osb);
2101
2102 status = ocfs2_recovery_init(osb);
2103 if (status) {
2104 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2105 mlog_errno(status);
2106 goto bail;
2107 }
2108
2109 init_waitqueue_head(&osb->checkpoint_event);
2110
2111 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2112
2113 osb->slot_num = OCFS2_INVALID_SLOT;
2114
2115 osb->s_xattr_inline_size = le16_to_cpu(
2116 di->id2.i_super.s_xattr_inline_size);
2117
2118 osb->local_alloc_state = OCFS2_LA_UNUSED;
2119 osb->local_alloc_bh = NULL;
2120 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2121
2122 init_waitqueue_head(&osb->osb_mount_event);
2123
2124 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2125 if (status) {
2126 mlog_errno(status);
2127 goto bail;
2128 }
2129
2130 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2131 if (!osb->vol_label) {
2132 mlog(ML_ERROR, "unable to alloc vol label\n");
2133 status = -ENOMEM;
2134 goto bail;
2135 }
2136
2137 osb->slot_recovery_generations =
2138 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2139 GFP_KERNEL);
2140 if (!osb->slot_recovery_generations) {
2141 status = -ENOMEM;
2142 mlog_errno(status);
2143 goto bail;
2144 }
2145
2146 init_waitqueue_head(&osb->osb_wipe_event);
2147 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2148 sizeof(*osb->osb_orphan_wipes),
2149 GFP_KERNEL);
2150 if (!osb->osb_orphan_wipes) {
2151 status = -ENOMEM;
2152 mlog_errno(status);
2153 goto bail;
2154 }
2155
2156 osb->osb_rf_lock_tree = RB_ROOT;
2157
2158 osb->s_feature_compat =
2159 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2160 osb->s_feature_ro_compat =
2161 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2162 osb->s_feature_incompat =
2163 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2164
2165 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2166 mlog(ML_ERROR, "couldn't mount because of unsupported "
2167 "optional features (%x).\n", i);
2168 status = -EINVAL;
2169 goto bail;
2170 }
2171 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2172 mlog(ML_ERROR, "couldn't mount RDWR because of "
2173 "unsupported optional features (%x).\n", i);
2174 status = -EINVAL;
2175 goto bail;
2176 }
2177
2178 if (ocfs2_clusterinfo_valid(osb)) {
2179 osb->osb_stackflags =
2180 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2181 strlcpy(osb->osb_cluster_stack,
2182 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2183 OCFS2_STACK_LABEL_LEN + 1);
2184 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2185 mlog(ML_ERROR,
2186 "couldn't mount because of an invalid "
2187 "cluster stack label (%s) \n",
2188 osb->osb_cluster_stack);
2189 status = -EINVAL;
2190 goto bail;
2191 }
2192 strlcpy(osb->osb_cluster_name,
2193 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2194 OCFS2_CLUSTER_NAME_LEN + 1);
2195 } else {
2196 /* The empty string is identical with classic tools that
2197 * don't know about s_cluster_info. */
2198 osb->osb_cluster_stack[0] = '\0';
2199 }
2200
2201 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2202
2203 /* FIXME
2204 * This should be done in ocfs2_journal_init(), but unknown
2205 * ordering issues will cause the filesystem to crash.
2206 * If anyone wants to figure out what part of the code
2207 * refers to osb->journal before ocfs2_journal_init() is run,
2208 * be my guest.
2209 */
2210 /* initialize our journal structure */
2211
2212 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2213 if (!journal) {
2214 mlog(ML_ERROR, "unable to alloc journal\n");
2215 status = -ENOMEM;
2216 goto bail;
2217 }
2218 osb->journal = journal;
2219 journal->j_osb = osb;
2220
2221 atomic_set(&journal->j_num_trans, 0);
2222 init_rwsem(&journal->j_trans_barrier);
2223 init_waitqueue_head(&journal->j_checkpointed);
2224 spin_lock_init(&journal->j_lock);
2225 journal->j_trans_id = (unsigned long) 1;
2226 INIT_LIST_HEAD(&journal->j_la_cleanups);
2227 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2228 journal->j_state = OCFS2_JOURNAL_FREE;
2229
2230 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2231 init_llist_head(&osb->dquot_drop_list);
2232
2233 /* get some pseudo constants for clustersize bits */
2234 osb->s_clustersize_bits =
2235 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2236 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2237
2238 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2239 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2240 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2241 osb->s_clustersize);
2242 status = -EINVAL;
2243 goto bail;
2244 }
2245
2246 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2247 le32_to_cpu(di->i_clusters));
2248
2249 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2250 total_blocks);
2251 if (status) {
2252 mlog(ML_ERROR, "Volume too large "
2253 "to mount safely on this system");
2254 status = -EFBIG;
2255 goto bail;
2256 }
2257
2258 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2259 sizeof(di->id2.i_super.s_uuid))) {
2260 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2261 status = -ENOMEM;
2262 goto bail;
2263 }
2264
2265 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2266 OCFS2_MAX_VOL_LABEL_LEN);
2267 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2268 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2269 osb->first_cluster_group_blkno =
2270 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2271 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2272 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2273 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2274 (unsigned long long)osb->root_blkno,
2275 (unsigned long long)osb->system_dir_blkno,
2276 osb->s_clustersize_bits);
2277
2278 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2279 if (!osb->osb_dlm_debug) {
2280 status = -ENOMEM;
2281 mlog_errno(status);
2282 goto bail;
2283 }
2284
2285 atomic_set(&osb->vol_state, VOLUME_INIT);
2286
2287 /* load root, system_dir, and all global system inodes */
2288 status = ocfs2_init_global_system_inodes(osb);
2289 if (status < 0) {
2290 mlog_errno(status);
2291 goto bail;
2292 }
2293
2294 /*
2295 * global bitmap
2296 */
2297 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2298 OCFS2_INVALID_SLOT);
2299 if (!inode) {
2300 status = -EINVAL;
2301 mlog_errno(status);
2302 goto bail;
2303 }
2304
2305 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2306 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2307 iput(inode);
2308
2309 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2310 osb->s_feature_incompat) * 8;
2311
2312 status = ocfs2_init_slot_info(osb);
2313 if (status < 0) {
2314 mlog_errno(status);
2315 goto bail;
2316 }
2317 cleancache_init_shared_fs(sb);
2318
2319 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2320 if (!osb->ocfs2_wq) {
2321 status = -ENOMEM;
2322 mlog_errno(status);
2323 }
2324
2325 bail:
2326 return status;
2327 }
2328
2329 /*
2330 * will return: -EAGAIN if it is ok to keep searching for superblocks
2331 * -EINVAL if there is a bad superblock
2332 * 0 on success
2333 */
2334 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2335 struct buffer_head *bh,
2336 u32 blksz,
2337 struct ocfs2_blockcheck_stats *stats)
2338 {
2339 int status = -EAGAIN;
2340
2341 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2342 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2343 /* We have to do a raw check of the feature here */
2344 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2345 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2346 status = ocfs2_block_check_validate(bh->b_data,
2347 bh->b_size,
2348 &di->i_check,
2349 stats);
2350 if (status)
2351 goto out;
2352 }
2353 status = -EINVAL;
2354 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2355 mlog(ML_ERROR, "found superblock with incorrect block "
2356 "size: found %u, should be %u\n",
2357 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2358 blksz);
2359 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2360 OCFS2_MAJOR_REV_LEVEL ||
2361 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2362 OCFS2_MINOR_REV_LEVEL) {
2363 mlog(ML_ERROR, "found superblock with bad version: "
2364 "found %u.%u, should be %u.%u\n",
2365 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2366 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2367 OCFS2_MAJOR_REV_LEVEL,
2368 OCFS2_MINOR_REV_LEVEL);
2369 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2370 mlog(ML_ERROR, "bad block number on superblock: "
2371 "found %llu, should be %llu\n",
2372 (unsigned long long)le64_to_cpu(di->i_blkno),
2373 (unsigned long long)bh->b_blocknr);
2374 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2375 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2376 mlog(ML_ERROR, "bad cluster size found: %u\n",
2377 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2378 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2379 mlog(ML_ERROR, "bad root_blkno: 0\n");
2380 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2381 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2382 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2383 mlog(ML_ERROR,
2384 "Superblock slots found greater than file system "
2385 "maximum: found %u, max %u\n",
2386 le16_to_cpu(di->id2.i_super.s_max_slots),
2387 OCFS2_MAX_SLOTS);
2388 } else {
2389 /* found it! */
2390 status = 0;
2391 }
2392 }
2393
2394 out:
2395 if (status && status != -EAGAIN)
2396 mlog_errno(status);
2397 return status;
2398 }
2399
2400 static int ocfs2_check_volume(struct ocfs2_super *osb)
2401 {
2402 int status;
2403 int dirty;
2404 int local;
2405 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2406 * recover
2407 * ourselves. */
2408
2409 /* Init our journal object. */
2410 status = ocfs2_journal_init(osb->journal, &dirty);
2411 if (status < 0) {
2412 mlog(ML_ERROR, "Could not initialize journal!\n");
2413 goto finally;
2414 }
2415
2416 /* Now that journal has been initialized, check to make sure
2417 entire volume is addressable. */
2418 status = ocfs2_journal_addressable(osb);
2419 if (status)
2420 goto finally;
2421
2422 /* If the journal was unmounted cleanly then we don't want to
2423 * recover anything. Otherwise, journal_load will do that
2424 * dirty work for us :) */
2425 if (!dirty) {
2426 status = ocfs2_journal_wipe(osb->journal, 0);
2427 if (status < 0) {
2428 mlog_errno(status);
2429 goto finally;
2430 }
2431 } else {
2432 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2433 "unmounted cleanly, recovering it.\n", osb->dev_str);
2434 }
2435
2436 local = ocfs2_mount_local(osb);
2437
2438 /* will play back anything left in the journal. */
2439 status = ocfs2_journal_load(osb->journal, local, dirty);
2440 if (status < 0) {
2441 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2442 goto finally;
2443 }
2444
2445 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2446 jbd2_journal_set_features(osb->journal->j_journal,
2447 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2448 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2449 else
2450 jbd2_journal_clear_features(osb->journal->j_journal,
2451 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2452 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2453
2454 if (dirty) {
2455 /* recover my local alloc if we didn't unmount cleanly. */
2456 status = ocfs2_begin_local_alloc_recovery(osb,
2457 osb->slot_num,
2458 &local_alloc);
2459 if (status < 0) {
2460 mlog_errno(status);
2461 goto finally;
2462 }
2463 /* we complete the recovery process after we've marked
2464 * ourselves as mounted. */
2465 }
2466
2467 status = ocfs2_load_local_alloc(osb);
2468 if (status < 0) {
2469 mlog_errno(status);
2470 goto finally;
2471 }
2472
2473 if (dirty) {
2474 /* Recovery will be completed after we've mounted the
2475 * rest of the volume. */
2476 osb->local_alloc_copy = local_alloc;
2477 local_alloc = NULL;
2478 }
2479
2480 /* go through each journal, trylock it and if you get the
2481 * lock, and it's marked as dirty, set the bit in the recover
2482 * map and launch a recovery thread for it. */
2483 status = ocfs2_mark_dead_nodes(osb);
2484 if (status < 0) {
2485 mlog_errno(status);
2486 goto finally;
2487 }
2488
2489 status = ocfs2_compute_replay_slots(osb);
2490 if (status < 0)
2491 mlog_errno(status);
2492
2493 finally:
2494 kfree(local_alloc);
2495
2496 if (status)
2497 mlog_errno(status);
2498 return status;
2499 }
2500
2501 /*
2502 * The routine gets called from dismount or close whenever a dismount on
2503 * volume is requested and the osb open count becomes 1.
2504 * It will remove the osb from the global list and also free up all the
2505 * initialized resources and fileobject.
2506 */
2507 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2508 {
2509 /* This function assumes that the caller has the main osb resource */
2510
2511 /* ocfs2_initializer_super have already created this workqueue */
2512 if (osb->ocfs2_wq)
2513 destroy_workqueue(osb->ocfs2_wq);
2514
2515 ocfs2_free_slot_info(osb);
2516
2517 kfree(osb->osb_orphan_wipes);
2518 kfree(osb->slot_recovery_generations);
2519 /* FIXME
2520 * This belongs in journal shutdown, but because we have to
2521 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2522 * we free it here.
2523 */
2524 kfree(osb->journal);
2525 kfree(osb->local_alloc_copy);
2526 kfree(osb->uuid_str);
2527 kfree(osb->vol_label);
2528 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2529 memset(osb, 0, sizeof(struct ocfs2_super));
2530 }
2531
2532 /* Depending on the mount option passed, perform one of the following:
2533 * Put OCFS2 into a readonly state (default)
2534 * Return EIO so that only the process errs
2535 * Fix the error as if fsck.ocfs2 -y
2536 * panic
2537 */
2538 static int ocfs2_handle_error(struct super_block *sb)
2539 {
2540 struct ocfs2_super *osb = OCFS2_SB(sb);
2541 int rv = 0;
2542
2543 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2544 pr_crit("On-disk corruption discovered. "
2545 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2546
2547 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2548 panic("OCFS2: (device %s): panic forced after error\n",
2549 sb->s_id);
2550 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2551 pr_crit("OCFS2: Returning error to the calling process.\n");
2552 rv = -EIO;
2553 } else { /* default option */
2554 rv = -EROFS;
2555 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2556 return rv;
2557
2558 pr_crit("OCFS2: File system is now read-only.\n");
2559 sb->s_flags |= SB_RDONLY;
2560 ocfs2_set_ro_flag(osb, 0);
2561 }
2562
2563 return rv;
2564 }
2565
2566 int __ocfs2_error(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 vaf.fmt = fmt;
2574 vaf.va = &args;
2575
2576 /* Not using mlog here because we want to show the actual
2577 * function the error came from. */
2578 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2579 sb->s_id, function, &vaf);
2580
2581 va_end(args);
2582
2583 return ocfs2_handle_error(sb);
2584 }
2585
2586 /* Handle critical errors. This is intentionally more drastic than
2587 * ocfs2_handle_error, so we only use for things like journal errors,
2588 * etc. */
2589 void __ocfs2_abort(struct super_block *sb, const char *function,
2590 const char *fmt, ...)
2591 {
2592 struct va_format vaf;
2593 va_list args;
2594
2595 va_start(args, fmt);
2596
2597 vaf.fmt = fmt;
2598 vaf.va = &args;
2599
2600 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2601 sb->s_id, function, &vaf);
2602
2603 va_end(args);
2604
2605 /* We don't have the cluster support yet to go straight to
2606 * hard readonly in here. Until then, we want to keep
2607 * ocfs2_abort() so that we can at least mark critical
2608 * errors.
2609 *
2610 * TODO: This should abort the journal and alert other nodes
2611 * that our slot needs recovery. */
2612
2613 /* Force a panic(). This stinks, but it's better than letting
2614 * things continue without having a proper hard readonly
2615 * here. */
2616 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2617 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2618 ocfs2_handle_error(sb);
2619 }
2620
2621 /*
2622 * Void signal blockers, because in-kernel sigprocmask() only fails
2623 * when SIG_* is wrong.
2624 */
2625 void ocfs2_block_signals(sigset_t *oldset)
2626 {
2627 int rc;
2628 sigset_t blocked;
2629
2630 sigfillset(&blocked);
2631 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2632 BUG_ON(rc);
2633 }
2634
2635 void ocfs2_unblock_signals(sigset_t *oldset)
2636 {
2637 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2638 BUG_ON(rc);
2639 }
2640
2641 module_init(ocfs2_init);
2642 module_exit(ocfs2_exit);
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