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mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
[linux/fpc-iii.git] / fs / ocfs2 / super.c
blobf9deabfa303e99bdff75a46cc74351a467cf0a44
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/init.h>
32 #include <linux/random.h>
33 #include <linux/statfs.h>
34 #include <linux/moduleparam.h>
35 #include <linux/blkdev.h>
36 #include <linux/socket.h>
37 #include <linux/inet.h>
38 #include <linux/parser.h>
39 #include <linux/crc32.h>
40 #include <linux/debugfs.h>
41 #include <linux/mount.h>
42 #include <linux/seq_file.h>
43 #include <linux/quotaops.h>
44 #include <linux/cleancache.h>
45 #include <linux/signal.h>
46
47 #define CREATE_TRACE_POINTS
48 #include "ocfs2_trace.h"
49
50 #include <cluster/masklog.h>
51
52 #include "ocfs2.h"
53
54 /* this should be the only file to include a version 1 header */
55 #include "ocfs1_fs_compat.h"
56
57 #include "alloc.h"
58 #include "aops.h"
59 #include "blockcheck.h"
60 #include "dlmglue.h"
61 #include "export.h"
62 #include "extent_map.h"
63 #include "heartbeat.h"
64 #include "inode.h"
65 #include "journal.h"
66 #include "localalloc.h"
67 #include "namei.h"
68 #include "slot_map.h"
69 #include "super.h"
70 #include "sysfile.h"
71 #include "uptodate.h"
72 #include "xattr.h"
73 #include "quota.h"
74 #include "refcounttree.h"
75 #include "suballoc.h"
76
77 #include "buffer_head_io.h"
78 #include "filecheck.h"
79
80 static struct kmem_cache *ocfs2_inode_cachep;
81 struct kmem_cache *ocfs2_dquot_cachep;
82 struct kmem_cache *ocfs2_qf_chunk_cachep;
83
84 static struct dentry *ocfs2_debugfs_root;
85
86 MODULE_AUTHOR("Oracle");
87 MODULE_LICENSE("GPL");
88 MODULE_DESCRIPTION("OCFS2 cluster file system");
89
90 struct mount_options
91 {
92 unsigned long commit_interval;
93 unsigned long mount_opt;
94 unsigned int atime_quantum;
95 unsigned short slot;
96 int localalloc_opt;
97 unsigned int resv_level;
98 int dir_resv_level;
99 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
100 };
101
102 static int ocfs2_parse_options(struct super_block *sb, char *options,
103 struct mount_options *mopt,
104 int is_remount);
105 static int ocfs2_check_set_options(struct super_block *sb,
106 struct mount_options *options);
107 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
108 static void ocfs2_put_super(struct super_block *sb);
109 static int ocfs2_mount_volume(struct super_block *sb);
110 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
111 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
112 static int ocfs2_initialize_mem_caches(void);
113 static void ocfs2_free_mem_caches(void);
114 static void ocfs2_delete_osb(struct ocfs2_super *osb);
115
116 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
117
118 static int ocfs2_sync_fs(struct super_block *sb, int wait);
119
120 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
121 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
122 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
123 static int ocfs2_check_volume(struct ocfs2_super *osb);
124 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
125 struct buffer_head *bh,
126 u32 sectsize,
127 struct ocfs2_blockcheck_stats *stats);
128 static int ocfs2_initialize_super(struct super_block *sb,
129 struct buffer_head *bh,
130 int sector_size,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_get_sector(struct super_block *sb,
133 struct buffer_head **bh,
134 int block,
135 int sect_size);
136 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
137 static void ocfs2_destroy_inode(struct inode *inode);
138 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
139 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
140 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
141
142 static struct dquot **ocfs2_get_dquots(struct inode *inode)
143 {
144 return OCFS2_I(inode)->i_dquot;
145 }
146
147 static const struct super_operations ocfs2_sops = {
148 .statfs = ocfs2_statfs,
149 .alloc_inode = ocfs2_alloc_inode,
150 .destroy_inode = ocfs2_destroy_inode,
151 .drop_inode = ocfs2_drop_inode,
152 .evict_inode = ocfs2_evict_inode,
153 .sync_fs = ocfs2_sync_fs,
154 .put_super = ocfs2_put_super,
155 .remount_fs = ocfs2_remount,
156 .show_options = ocfs2_show_options,
157 .quota_read = ocfs2_quota_read,
158 .quota_write = ocfs2_quota_write,
159 .get_dquots = ocfs2_get_dquots,
160 };
161
162 enum {
163 Opt_barrier,
164 Opt_err_panic,
165 Opt_err_ro,
166 Opt_intr,
167 Opt_nointr,
168 Opt_hb_none,
169 Opt_hb_local,
170 Opt_hb_global,
171 Opt_data_ordered,
172 Opt_data_writeback,
173 Opt_atime_quantum,
174 Opt_slot,
175 Opt_commit,
176 Opt_localalloc,
177 Opt_localflocks,
178 Opt_stack,
179 Opt_user_xattr,
180 Opt_nouser_xattr,
181 Opt_inode64,
182 Opt_acl,
183 Opt_noacl,
184 Opt_usrquota,
185 Opt_grpquota,
186 Opt_coherency_buffered,
187 Opt_coherency_full,
188 Opt_resv_level,
189 Opt_dir_resv_level,
190 Opt_journal_async_commit,
191 Opt_err_cont,
192 Opt_err,
193 };
194
195 static const match_table_t tokens = {
196 {Opt_barrier, "barrier=%u"},
197 {Opt_err_panic, "errors=panic"},
198 {Opt_err_ro, "errors=remount-ro"},
199 {Opt_intr, "intr"},
200 {Opt_nointr, "nointr"},
201 {Opt_hb_none, OCFS2_HB_NONE},
202 {Opt_hb_local, OCFS2_HB_LOCAL},
203 {Opt_hb_global, OCFS2_HB_GLOBAL},
204 {Opt_data_ordered, "data=ordered"},
205 {Opt_data_writeback, "data=writeback"},
206 {Opt_atime_quantum, "atime_quantum=%u"},
207 {Opt_slot, "preferred_slot=%u"},
208 {Opt_commit, "commit=%u"},
209 {Opt_localalloc, "localalloc=%d"},
210 {Opt_localflocks, "localflocks"},
211 {Opt_stack, "cluster_stack=%s"},
212 {Opt_user_xattr, "user_xattr"},
213 {Opt_nouser_xattr, "nouser_xattr"},
214 {Opt_inode64, "inode64"},
215 {Opt_acl, "acl"},
216 {Opt_noacl, "noacl"},
217 {Opt_usrquota, "usrquota"},
218 {Opt_grpquota, "grpquota"},
219 {Opt_coherency_buffered, "coherency=buffered"},
220 {Opt_coherency_full, "coherency=full"},
221 {Opt_resv_level, "resv_level=%u"},
222 {Opt_dir_resv_level, "dir_resv_level=%u"},
223 {Opt_journal_async_commit, "journal_async_commit"},
224 {Opt_err_cont, "errors=continue"},
225 {Opt_err, NULL}
226 };
227
228 #ifdef CONFIG_DEBUG_FS
229 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
230 {
231 struct ocfs2_cluster_connection *cconn = osb->cconn;
232 struct ocfs2_recovery_map *rm = osb->recovery_map;
233 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
234 int i, out = 0;
235 unsigned long flags;
236
237 out += snprintf(buf + out, len - out,
238 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
239 "Device", osb->dev_str, osb->uuid_str,
240 osb->fs_generation, osb->vol_label);
241
242 out += snprintf(buf + out, len - out,
243 "%10s => State: %d Flags: 0x%lX\n", "Volume",
244 atomic_read(&osb->vol_state), osb->osb_flags);
245
246 out += snprintf(buf + out, len - out,
247 "%10s => Block: %lu Cluster: %d\n", "Sizes",
248 osb->sb->s_blocksize, osb->s_clustersize);
249
250 out += snprintf(buf + out, len - out,
251 "%10s => Compat: 0x%X Incompat: 0x%X "
252 "ROcompat: 0x%X\n",
253 "Features", osb->s_feature_compat,
254 osb->s_feature_incompat, osb->s_feature_ro_compat);
255
256 out += snprintf(buf + out, len - out,
257 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
258 osb->s_mount_opt, osb->s_atime_quantum);
259
260 if (cconn) {
261 out += snprintf(buf + out, len - out,
262 "%10s => Stack: %s Name: %*s "
263 "Version: %d.%d\n", "Cluster",
264 (*osb->osb_cluster_stack == '\0' ?
265 "o2cb" : osb->osb_cluster_stack),
266 cconn->cc_namelen, cconn->cc_name,
267 cconn->cc_version.pv_major,
268 cconn->cc_version.pv_minor);
269 }
270
271 spin_lock_irqsave(&osb->dc_task_lock, flags);
272 out += snprintf(buf + out, len - out,
273 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
274 "WorkSeq: %lu\n", "DownCnvt",
275 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
276 osb->blocked_lock_count, osb->dc_wake_sequence,
277 osb->dc_work_sequence);
278 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
279
280 spin_lock(&osb->osb_lock);
281 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
282 "Recovery",
283 (osb->recovery_thread_task ?
284 task_pid_nr(osb->recovery_thread_task) : -1));
285 if (rm->rm_used == 0)
286 out += snprintf(buf + out, len - out, " None\n");
287 else {
288 for (i = 0; i < rm->rm_used; i++)
289 out += snprintf(buf + out, len - out, " %d",
290 rm->rm_entries[i]);
291 out += snprintf(buf + out, len - out, "\n");
292 }
293 spin_unlock(&osb->osb_lock);
294
295 out += snprintf(buf + out, len - out,
296 "%10s => Pid: %d Interval: %lu\n", "Commit",
297 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
298 osb->osb_commit_interval);
299
300 out += snprintf(buf + out, len - out,
301 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
302 "Journal", osb->journal->j_state,
303 osb->journal->j_trans_id,
304 atomic_read(&osb->journal->j_num_trans));
305
306 out += snprintf(buf + out, len - out,
307 "%10s => GlobalAllocs: %d LocalAllocs: %d "
308 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
309 "Stats",
310 atomic_read(&osb->alloc_stats.bitmap_data),
311 atomic_read(&osb->alloc_stats.local_data),
312 atomic_read(&osb->alloc_stats.bg_allocs),
313 atomic_read(&osb->alloc_stats.moves),
314 atomic_read(&osb->alloc_stats.bg_extends));
315
316 out += snprintf(buf + out, len - out,
317 "%10s => State: %u Descriptor: %llu Size: %u bits "
318 "Default: %u bits\n",
319 "LocalAlloc", osb->local_alloc_state,
320 (unsigned long long)osb->la_last_gd,
321 osb->local_alloc_bits, osb->local_alloc_default_bits);
322
323 spin_lock(&osb->osb_lock);
324 out += snprintf(buf + out, len - out,
325 "%10s => InodeSlot: %d StolenInodes: %d, "
326 "MetaSlot: %d StolenMeta: %d\n", "Steal",
327 osb->s_inode_steal_slot,
328 atomic_read(&osb->s_num_inodes_stolen),
329 osb->s_meta_steal_slot,
330 atomic_read(&osb->s_num_meta_stolen));
331 spin_unlock(&osb->osb_lock);
332
333 out += snprintf(buf + out, len - out, "OrphanScan => ");
334 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
335 os->os_count, os->os_seqno);
336 out += snprintf(buf + out, len - out, " Last Scan: ");
337 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
338 out += snprintf(buf + out, len - out, "Disabled\n");
339 else
340 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
341 (unsigned long)(ktime_get_seconds() - os->os_scantime));
342
343 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
344 "Slots", "Num", "RecoGen");
345 for (i = 0; i < osb->max_slots; ++i) {
346 out += snprintf(buf + out, len - out,
347 "%10s %c %3d %10d\n",
348 " ",
349 (i == osb->slot_num ? '*' : ' '),
350 i, osb->slot_recovery_generations[i]);
351 }
352
353 return out;
354 }
355
356 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
357 {
358 struct ocfs2_super *osb = inode->i_private;
359 char *buf = NULL;
360
361 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
362 if (!buf)
363 goto bail;
364
365 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
366
367 file->private_data = buf;
368
369 return 0;
370 bail:
371 return -ENOMEM;
372 }
373
374 static int ocfs2_debug_release(struct inode *inode, struct file *file)
375 {
376 kfree(file->private_data);
377 return 0;
378 }
379
380 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
381 size_t nbytes, loff_t *ppos)
382 {
383 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
384 i_size_read(file->f_mapping->host));
385 }
386 #else
387 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
388 {
389 return 0;
390 }
391 static int ocfs2_debug_release(struct inode *inode, struct file *file)
392 {
393 return 0;
394 }
395 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
396 size_t nbytes, loff_t *ppos)
397 {
398 return 0;
399 }
400 #endif /* CONFIG_DEBUG_FS */
401
402 static const struct file_operations ocfs2_osb_debug_fops = {
403 .open = ocfs2_osb_debug_open,
404 .release = ocfs2_debug_release,
405 .read = ocfs2_debug_read,
406 .llseek = generic_file_llseek,
407 };
408
409 static int ocfs2_sync_fs(struct super_block *sb, int wait)
410 {
411 int status;
412 tid_t target;
413 struct ocfs2_super *osb = OCFS2_SB(sb);
414
415 if (ocfs2_is_hard_readonly(osb))
416 return -EROFS;
417
418 if (wait) {
419 status = ocfs2_flush_truncate_log(osb);
420 if (status < 0)
421 mlog_errno(status);
422 } else {
423 ocfs2_schedule_truncate_log_flush(osb, 0);
424 }
425
426 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
427 &target)) {
428 if (wait)
429 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
430 target);
431 }
432 return 0;
433 }
434
435 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
436 {
437 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
438 && (ino == USER_QUOTA_SYSTEM_INODE
439 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
440 return 0;
441 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
442 && (ino == GROUP_QUOTA_SYSTEM_INODE
443 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
444 return 0;
445 return 1;
446 }
447
448 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
449 {
450 struct inode *new = NULL;
451 int status = 0;
452 int i;
453
454 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
455 if (IS_ERR(new)) {
456 status = PTR_ERR(new);
457 mlog_errno(status);
458 goto bail;
459 }
460 osb->root_inode = new;
461
462 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
463 if (IS_ERR(new)) {
464 status = PTR_ERR(new);
465 mlog_errno(status);
466 goto bail;
467 }
468 osb->sys_root_inode = new;
469
470 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
471 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
472 if (!ocfs2_need_system_inode(osb, i))
473 continue;
474 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
475 if (!new) {
476 ocfs2_release_system_inodes(osb);
477 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
478 mlog_errno(status);
479 mlog(ML_ERROR, "Unable to load system inode %d, "
480 "possibly corrupt fs?", i);
481 goto bail;
482 }
483 // the array now has one ref, so drop this one
484 iput(new);
485 }
486
487 bail:
488 if (status)
489 mlog_errno(status);
490 return status;
491 }
492
493 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
494 {
495 struct inode *new = NULL;
496 int status = 0;
497 int i;
498
499 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
500 i < NUM_SYSTEM_INODES;
501 i++) {
502 if (!ocfs2_need_system_inode(osb, i))
503 continue;
504 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
505 if (!new) {
506 ocfs2_release_system_inodes(osb);
507 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
508 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
509 status, i, osb->slot_num);
510 goto bail;
511 }
512 /* the array now has one ref, so drop this one */
513 iput(new);
514 }
515
516 bail:
517 if (status)
518 mlog_errno(status);
519 return status;
520 }
521
522 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
523 {
524 int i;
525 struct inode *inode;
526
527 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
528 inode = osb->global_system_inodes[i];
529 if (inode) {
530 iput(inode);
531 osb->global_system_inodes[i] = NULL;
532 }
533 }
534
535 inode = osb->sys_root_inode;
536 if (inode) {
537 iput(inode);
538 osb->sys_root_inode = NULL;
539 }
540
541 inode = osb->root_inode;
542 if (inode) {
543 iput(inode);
544 osb->root_inode = NULL;
545 }
546
547 if (!osb->local_system_inodes)
548 return;
549
550 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
551 if (osb->local_system_inodes[i]) {
552 iput(osb->local_system_inodes[i]);
553 osb->local_system_inodes[i] = NULL;
554 }
555 }
556
557 kfree(osb->local_system_inodes);
558 osb->local_system_inodes = NULL;
559 }
560
561 /* We're allocating fs objects, use GFP_NOFS */
562 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
563 {
564 struct ocfs2_inode_info *oi;
565
566 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
567 if (!oi)
568 return NULL;
569
570 oi->i_sync_tid = 0;
571 oi->i_datasync_tid = 0;
572 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
573
574 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
575 return &oi->vfs_inode;
576 }
577
578 static void ocfs2_i_callback(struct rcu_head *head)
579 {
580 struct inode *inode = container_of(head, struct inode, i_rcu);
581 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
582 }
583
584 static void ocfs2_destroy_inode(struct inode *inode)
585 {
586 call_rcu(&inode->i_rcu, ocfs2_i_callback);
587 }
588
589 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
590 unsigned int cbits)
591 {
592 unsigned int bytes = 1 << cbits;
593 unsigned int trim = bytes;
594 unsigned int bitshift = 32;
595
596 /*
597 * i_size and all block offsets in ocfs2 are always 64 bits
598 * wide. i_clusters is 32 bits, in cluster-sized units. So on
599 * 64 bit platforms, cluster size will be the limiting factor.
600 */
601
602 #if BITS_PER_LONG == 32
603 # if defined(CONFIG_LBDAF)
604 BUILD_BUG_ON(sizeof(sector_t) != 8);
605 /*
606 * We might be limited by page cache size.
607 */
608 if (bytes > PAGE_SIZE) {
609 bytes = PAGE_SIZE;
610 trim = 1;
611 /*
612 * Shift by 31 here so that we don't get larger than
613 * MAX_LFS_FILESIZE
614 */
615 bitshift = 31;
616 }
617 # else
618 /*
619 * We are limited by the size of sector_t. Use block size, as
620 * that's what we expose to the VFS.
621 */
622 bytes = 1 << bbits;
623 trim = 1;
624 bitshift = 31;
625 # endif
626 #endif
627
628 /*
629 * Trim by a whole cluster when we can actually approach the
630 * on-disk limits. Otherwise we can overflow i_clusters when
631 * an extent start is at the max offset.
632 */
633 return (((unsigned long long)bytes) << bitshift) - trim;
634 }
635
636 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
637 {
638 int incompat_features;
639 int ret = 0;
640 struct mount_options parsed_options;
641 struct ocfs2_super *osb = OCFS2_SB(sb);
642 u32 tmp;
643
644 sync_filesystem(sb);
645
646 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
647 !ocfs2_check_set_options(sb, &parsed_options)) {
648 ret = -EINVAL;
649 goto out;
650 }
651
652 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
653 OCFS2_MOUNT_HB_NONE;
654 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
655 ret = -EINVAL;
656 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
657 goto out;
658 }
659
660 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
661 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
662 ret = -EINVAL;
663 mlog(ML_ERROR, "Cannot change data mode on remount\n");
664 goto out;
665 }
666
667 /* Probably don't want this on remount; it might
668 * mess with other nodes */
669 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
670 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
671 ret = -EINVAL;
672 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
673 goto out;
674 }
675
676 /* We're going to/from readonly mode. */
677 if ((bool)(*flags & MS_RDONLY) != sb_rdonly(sb)) {
678 /* Disable quota accounting before remounting RO */
679 if (*flags & MS_RDONLY) {
680 ret = ocfs2_susp_quotas(osb, 0);
681 if (ret < 0)
682 goto out;
683 }
684 /* Lock here so the check of HARD_RO and the potential
685 * setting of SOFT_RO is atomic. */
686 spin_lock(&osb->osb_lock);
687 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
688 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692
693 if (*flags & MS_RDONLY) {
694 sb->s_flags |= MS_RDONLY;
695 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
696 } else {
697 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
698 mlog(ML_ERROR, "Cannot remount RDWR "
699 "filesystem due to previous errors.\n");
700 ret = -EROFS;
701 goto unlock_osb;
702 }
703 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
704 if (incompat_features) {
705 mlog(ML_ERROR, "Cannot remount RDWR because "
706 "of unsupported optional features "
707 "(%x).\n", incompat_features);
708 ret = -EINVAL;
709 goto unlock_osb;
710 }
711 sb->s_flags &= ~MS_RDONLY;
712 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
713 }
714 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
715 unlock_osb:
716 spin_unlock(&osb->osb_lock);
717 /* Enable quota accounting after remounting RW */
718 if (!ret && !(*flags & MS_RDONLY)) {
719 if (sb_any_quota_suspended(sb))
720 ret = ocfs2_susp_quotas(osb, 1);
721 else
722 ret = ocfs2_enable_quotas(osb);
723 if (ret < 0) {
724 /* Return back changes... */
725 spin_lock(&osb->osb_lock);
726 sb->s_flags |= MS_RDONLY;
727 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
728 spin_unlock(&osb->osb_lock);
729 goto out;
730 }
731 }
732 }
733
734 if (!ret) {
735 /* Only save off the new mount options in case of a successful
736 * remount. */
737 osb->s_mount_opt = parsed_options.mount_opt;
738 osb->s_atime_quantum = parsed_options.atime_quantum;
739 osb->preferred_slot = parsed_options.slot;
740 if (parsed_options.commit_interval)
741 osb->osb_commit_interval = parsed_options.commit_interval;
742
743 if (!ocfs2_is_hard_readonly(osb))
744 ocfs2_set_journal_params(osb);
745
746 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
747 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
748 MS_POSIXACL : 0);
749 }
750 out:
751 return ret;
752 }
753
754 static int ocfs2_sb_probe(struct super_block *sb,
755 struct buffer_head **bh,
756 int *sector_size,
757 struct ocfs2_blockcheck_stats *stats)
758 {
759 int status, tmpstat;
760 struct ocfs1_vol_disk_hdr *hdr;
761 struct ocfs2_dinode *di;
762 int blksize;
763
764 *bh = NULL;
765
766 /* may be > 512 */
767 *sector_size = bdev_logical_block_size(sb->s_bdev);
768 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
769 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
770 *sector_size, OCFS2_MAX_BLOCKSIZE);
771 status = -EINVAL;
772 goto bail;
773 }
774
775 /* Can this really happen? */
776 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
777 *sector_size = OCFS2_MIN_BLOCKSIZE;
778
779 /* check block zero for old format */
780 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
781 if (status < 0) {
782 mlog_errno(status);
783 goto bail;
784 }
785 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
786 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
787 mlog(ML_ERROR, "incompatible version: %u.%u\n",
788 hdr->major_version, hdr->minor_version);
789 status = -EINVAL;
790 }
791 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
792 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
793 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
794 hdr->signature);
795 status = -EINVAL;
796 }
797 brelse(*bh);
798 *bh = NULL;
799 if (status < 0) {
800 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
801 "upgraded before mounting with ocfs v2\n");
802 goto bail;
803 }
804
805 /*
806 * Now check at magic offset for 512, 1024, 2048, 4096
807 * blocksizes. 4096 is the maximum blocksize because it is
808 * the minimum clustersize.
809 */
810 status = -EINVAL;
811 for (blksize = *sector_size;
812 blksize <= OCFS2_MAX_BLOCKSIZE;
813 blksize <<= 1) {
814 tmpstat = ocfs2_get_sector(sb, bh,
815 OCFS2_SUPER_BLOCK_BLKNO,
816 blksize);
817 if (tmpstat < 0) {
818 status = tmpstat;
819 mlog_errno(status);
820 break;
821 }
822 di = (struct ocfs2_dinode *) (*bh)->b_data;
823 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
824 spin_lock_init(&stats->b_lock);
825 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
826 if (tmpstat < 0) {
827 brelse(*bh);
828 *bh = NULL;
829 }
830 if (tmpstat != -EAGAIN) {
831 status = tmpstat;
832 break;
833 }
834 }
835
836 bail:
837 return status;
838 }
839
840 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
841 {
842 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
843
844 if (osb->s_mount_opt & hb_enabled) {
845 if (ocfs2_mount_local(osb)) {
846 mlog(ML_ERROR, "Cannot heartbeat on a locally "
847 "mounted device.\n");
848 return -EINVAL;
849 }
850 if (ocfs2_userspace_stack(osb)) {
851 mlog(ML_ERROR, "Userspace stack expected, but "
852 "o2cb heartbeat arguments passed to mount\n");
853 return -EINVAL;
854 }
855 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
856 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
857 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
858 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
859 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
860 return -EINVAL;
861 }
862 }
863
864 if (!(osb->s_mount_opt & hb_enabled)) {
865 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
866 !ocfs2_userspace_stack(osb)) {
867 mlog(ML_ERROR, "Heartbeat has to be started to mount "
868 "a read-write clustered device.\n");
869 return -EINVAL;
870 }
871 }
872
873 return 0;
874 }
875
876 /*
877 * If we're using a userspace stack, mount should have passed
878 * a name that matches the disk. If not, mount should not
879 * have passed a stack.
880 */
881 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
882 struct mount_options *mopt)
883 {
884 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
885 mlog(ML_ERROR,
886 "cluster stack passed to mount, but this filesystem "
887 "does not support it\n");
888 return -EINVAL;
889 }
890
891 if (ocfs2_userspace_stack(osb) &&
892 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
893 OCFS2_STACK_LABEL_LEN)) {
894 mlog(ML_ERROR,
895 "cluster stack passed to mount (\"%s\") does not "
896 "match the filesystem (\"%s\")\n",
897 mopt->cluster_stack,
898 osb->osb_cluster_stack);
899 return -EINVAL;
900 }
901
902 return 0;
903 }
904
905 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
906 {
907 int type;
908 struct super_block *sb = osb->sb;
909 unsigned int feature[OCFS2_MAXQUOTAS] = {
910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
912 int status = 0;
913
914 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
915 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
916 continue;
917 if (unsuspend)
918 status = dquot_resume(sb, type);
919 else {
920 struct ocfs2_mem_dqinfo *oinfo;
921
922 /* Cancel periodic syncing before suspending */
923 oinfo = sb_dqinfo(sb, type)->dqi_priv;
924 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
925 status = dquot_suspend(sb, type);
926 }
927 if (status < 0)
928 break;
929 }
930 if (status < 0)
931 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
932 "remount (error = %d).\n", status);
933 return status;
934 }
935
936 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
937 {
938 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
939 struct super_block *sb = osb->sb;
940 unsigned int feature[OCFS2_MAXQUOTAS] = {
941 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
942 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
943 unsigned int ino[OCFS2_MAXQUOTAS] = {
944 LOCAL_USER_QUOTA_SYSTEM_INODE,
945 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
946 int status;
947 int type;
948
949 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
950 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
952 continue;
953 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
954 osb->slot_num);
955 if (!inode[type]) {
956 status = -ENOENT;
957 goto out_quota_off;
958 }
959 status = dquot_enable(inode[type], type, QFMT_OCFS2,
960 DQUOT_USAGE_ENABLED);
961 if (status < 0)
962 goto out_quota_off;
963 }
964
965 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
966 iput(inode[type]);
967 return 0;
968 out_quota_off:
969 ocfs2_disable_quotas(osb);
970 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
971 iput(inode[type]);
972 mlog_errno(status);
973 return status;
974 }
975
976 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
977 {
978 int type;
979 struct inode *inode;
980 struct super_block *sb = osb->sb;
981 struct ocfs2_mem_dqinfo *oinfo;
982
983 /* We mostly ignore errors in this function because there's not much
984 * we can do when we see them */
985 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
986 if (!sb_has_quota_loaded(sb, type))
987 continue;
988 oinfo = sb_dqinfo(sb, type)->dqi_priv;
989 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
990 inode = igrab(sb->s_dquot.files[type]);
991 /* Turn off quotas. This will remove all dquot structures from
992 * memory and so they will be automatically synced to global
993 * quota files */
994 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
995 DQUOT_LIMITS_ENABLED);
996 if (!inode)
997 continue;
998 iput(inode);
999 }
1000 }
1001
1002 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1003 {
1004 struct dentry *root;
1005 int status, sector_size;
1006 struct mount_options parsed_options;
1007 struct inode *inode = NULL;
1008 struct ocfs2_super *osb = NULL;
1009 struct buffer_head *bh = NULL;
1010 char nodestr[12];
1011 struct ocfs2_blockcheck_stats stats;
1012
1013 trace_ocfs2_fill_super(sb, data, silent);
1014
1015 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1016 status = -EINVAL;
1017 goto read_super_error;
1018 }
1019
1020 /* probe for superblock */
1021 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1022 if (status < 0) {
1023 mlog(ML_ERROR, "superblock probe failed!\n");
1024 goto read_super_error;
1025 }
1026
1027 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1028 osb = OCFS2_SB(sb);
1029 if (status < 0) {
1030 mlog_errno(status);
1031 goto read_super_error;
1032 }
1033 brelse(bh);
1034 bh = NULL;
1035
1036 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1037 status = -EINVAL;
1038 goto read_super_error;
1039 }
1040 osb->s_mount_opt = parsed_options.mount_opt;
1041 osb->s_atime_quantum = parsed_options.atime_quantum;
1042 osb->preferred_slot = parsed_options.slot;
1043 osb->osb_commit_interval = parsed_options.commit_interval;
1044
1045 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1046 osb->osb_resv_level = parsed_options.resv_level;
1047 osb->osb_dir_resv_level = parsed_options.resv_level;
1048 if (parsed_options.dir_resv_level == -1)
1049 osb->osb_dir_resv_level = parsed_options.resv_level;
1050 else
1051 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1052
1053 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1054 if (status)
1055 goto read_super_error;
1056
1057 sb->s_magic = OCFS2_SUPER_MAGIC;
1058
1059 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1060 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1061
1062 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1063 * heartbeat=none */
1064 if (bdev_read_only(sb->s_bdev)) {
1065 if (!sb_rdonly(sb)) {
1066 status = -EACCES;
1067 mlog(ML_ERROR, "Readonly device detected but readonly "
1068 "mount was not specified.\n");
1069 goto read_super_error;
1070 }
1071
1072 /* You should not be able to start a local heartbeat
1073 * on a readonly device. */
1074 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1075 status = -EROFS;
1076 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1077 "device.\n");
1078 goto read_super_error;
1079 }
1080
1081 status = ocfs2_check_journals_nolocks(osb);
1082 if (status < 0) {
1083 if (status == -EROFS)
1084 mlog(ML_ERROR, "Recovery required on readonly "
1085 "file system, but write access is "
1086 "unavailable.\n");
1087 else
1088 mlog_errno(status);
1089 goto read_super_error;
1090 }
1091
1092 ocfs2_set_ro_flag(osb, 1);
1093
1094 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1095 "Cluster services will not be used for this mount. "
1096 "Recovery will be skipped.\n", osb->dev_str);
1097 }
1098
1099 if (!ocfs2_is_hard_readonly(osb)) {
1100 if (sb_rdonly(sb))
1101 ocfs2_set_ro_flag(osb, 0);
1102 }
1103
1104 status = ocfs2_verify_heartbeat(osb);
1105 if (status < 0) {
1106 mlog_errno(status);
1107 goto read_super_error;
1108 }
1109
1110 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1111 ocfs2_debugfs_root);
1112 if (!osb->osb_debug_root) {
1113 status = -EINVAL;
1114 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1115 goto read_super_error;
1116 }
1117
1118 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1119 osb->osb_debug_root,
1120 osb,
1121 &ocfs2_osb_debug_fops);
1122 if (!osb->osb_ctxt) {
1123 status = -EINVAL;
1124 mlog_errno(status);
1125 goto read_super_error;
1126 }
1127
1128 if (ocfs2_meta_ecc(osb)) {
1129 status = ocfs2_blockcheck_stats_debugfs_install(
1130 &osb->osb_ecc_stats,
1131 osb->osb_debug_root);
1132 if (status) {
1133 mlog(ML_ERROR,
1134 "Unable to create blockcheck statistics "
1135 "files\n");
1136 goto read_super_error;
1137 }
1138 }
1139
1140 status = ocfs2_mount_volume(sb);
1141 if (status < 0)
1142 goto read_super_error;
1143
1144 if (osb->root_inode)
1145 inode = igrab(osb->root_inode);
1146
1147 if (!inode) {
1148 status = -EIO;
1149 mlog_errno(status);
1150 goto read_super_error;
1151 }
1152
1153 root = d_make_root(inode);
1154 if (!root) {
1155 status = -ENOMEM;
1156 mlog_errno(status);
1157 goto read_super_error;
1158 }
1159
1160 sb->s_root = root;
1161
1162 ocfs2_complete_mount_recovery(osb);
1163
1164 if (ocfs2_mount_local(osb))
1165 snprintf(nodestr, sizeof(nodestr), "local");
1166 else
1167 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1168
1169 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1170 "with %s data mode.\n",
1171 osb->dev_str, nodestr, osb->slot_num,
1172 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1173 "ordered");
1174
1175 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1176 wake_up(&osb->osb_mount_event);
1177
1178 /* Now we can initialize quotas because we can afford to wait
1179 * for cluster locks recovery now. That also means that truncation
1180 * log recovery can happen but that waits for proper quota setup */
1181 if (!sb_rdonly(sb)) {
1182 status = ocfs2_enable_quotas(osb);
1183 if (status < 0) {
1184 /* We have to err-out specially here because
1185 * s_root is already set */
1186 mlog_errno(status);
1187 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1188 wake_up(&osb->osb_mount_event);
1189 return status;
1190 }
1191 }
1192
1193 ocfs2_complete_quota_recovery(osb);
1194
1195 /* Now we wake up again for processes waiting for quotas */
1196 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1197 wake_up(&osb->osb_mount_event);
1198
1199 /* Start this when the mount is almost sure of being successful */
1200 ocfs2_orphan_scan_start(osb);
1201
1202 /* Create filecheck sysfile /sys/fs/ocfs2/<devname>/filecheck */
1203 ocfs2_filecheck_create_sysfs(sb);
1204
1205 return status;
1206
1207 read_super_error:
1208 brelse(bh);
1209
1210 if (osb) {
1211 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1212 wake_up(&osb->osb_mount_event);
1213 ocfs2_dismount_volume(sb, 1);
1214 }
1215
1216 if (status)
1217 mlog_errno(status);
1218 return status;
1219 }
1220
1221 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1222 int flags,
1223 const char *dev_name,
1224 void *data)
1225 {
1226 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1227 }
1228
1229 static struct file_system_type ocfs2_fs_type = {
1230 .owner = THIS_MODULE,
1231 .name = "ocfs2",
1232 .mount = ocfs2_mount,
1233 .kill_sb = kill_block_super,
1234 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1235 .next = NULL
1236 };
1237 MODULE_ALIAS_FS("ocfs2");
1238
1239 static int ocfs2_check_set_options(struct super_block *sb,
1240 struct mount_options *options)
1241 {
1242 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1243 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1244 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1245 mlog(ML_ERROR, "User quotas were requested, but this "
1246 "filesystem does not have the feature enabled.\n");
1247 return 0;
1248 }
1249 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1250 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1251 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1252 mlog(ML_ERROR, "Group quotas were requested, but this "
1253 "filesystem does not have the feature enabled.\n");
1254 return 0;
1255 }
1256 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1257 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1258 mlog(ML_ERROR, "ACL support requested but extended attributes "
1259 "feature is not enabled\n");
1260 return 0;
1261 }
1262 /* No ACL setting specified? Use XATTR feature... */
1263 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1264 OCFS2_MOUNT_NO_POSIX_ACL))) {
1265 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1266 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1267 else
1268 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1269 }
1270 return 1;
1271 }
1272
1273 static int ocfs2_parse_options(struct super_block *sb,
1274 char *options,
1275 struct mount_options *mopt,
1276 int is_remount)
1277 {
1278 int status, user_stack = 0;
1279 char *p;
1280 u32 tmp;
1281 int token, option;
1282 substring_t args[MAX_OPT_ARGS];
1283
1284 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1285
1286 mopt->commit_interval = 0;
1287 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1288 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1289 mopt->slot = OCFS2_INVALID_SLOT;
1290 mopt->localalloc_opt = -1;
1291 mopt->cluster_stack[0] = '\0';
1292 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1293 mopt->dir_resv_level = -1;
1294
1295 if (!options) {
1296 status = 1;
1297 goto bail;
1298 }
1299
1300 while ((p = strsep(&options, ",")) != NULL) {
1301 if (!*p)
1302 continue;
1303
1304 token = match_token(p, tokens, args);
1305 switch (token) {
1306 case Opt_hb_local:
1307 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1308 break;
1309 case Opt_hb_none:
1310 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1311 break;
1312 case Opt_hb_global:
1313 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1314 break;
1315 case Opt_barrier:
1316 if (match_int(&args[0], &option)) {
1317 status = 0;
1318 goto bail;
1319 }
1320 if (option)
1321 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1322 else
1323 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1324 break;
1325 case Opt_intr:
1326 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1327 break;
1328 case Opt_nointr:
1329 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1330 break;
1331 case Opt_err_panic:
1332 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1333 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1334 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1335 break;
1336 case Opt_err_ro:
1337 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1338 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1339 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1340 break;
1341 case Opt_err_cont:
1342 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1343 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1344 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1345 break;
1346 case Opt_data_ordered:
1347 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1348 break;
1349 case Opt_data_writeback:
1350 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1351 break;
1352 case Opt_user_xattr:
1353 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1354 break;
1355 case Opt_nouser_xattr:
1356 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1357 break;
1358 case Opt_atime_quantum:
1359 if (match_int(&args[0], &option)) {
1360 status = 0;
1361 goto bail;
1362 }
1363 if (option >= 0)
1364 mopt->atime_quantum = option;
1365 break;
1366 case Opt_slot:
1367 if (match_int(&args[0], &option)) {
1368 status = 0;
1369 goto bail;
1370 }
1371 if (option)
1372 mopt->slot = (u16)option;
1373 break;
1374 case Opt_commit:
1375 if (match_int(&args[0], &option)) {
1376 status = 0;
1377 goto bail;
1378 }
1379 if (option < 0)
1380 return 0;
1381 if (option == 0)
1382 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1383 mopt->commit_interval = HZ * option;
1384 break;
1385 case Opt_localalloc:
1386 if (match_int(&args[0], &option)) {
1387 status = 0;
1388 goto bail;
1389 }
1390 if (option >= 0)
1391 mopt->localalloc_opt = option;
1392 break;
1393 case Opt_localflocks:
1394 /*
1395 * Changing this during remount could race
1396 * flock() requests, or "unbalance" existing
1397 * ones (e.g., a lock is taken in one mode but
1398 * dropped in the other). If users care enough
1399 * to flip locking modes during remount, we
1400 * could add a "local" flag to individual
1401 * flock structures for proper tracking of
1402 * state.
1403 */
1404 if (!is_remount)
1405 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1406 break;
1407 case Opt_stack:
1408 /* Check both that the option we were passed
1409 * is of the right length and that it is a proper
1410 * string of the right length.
1411 */
1412 if (((args[0].to - args[0].from) !=
1413 OCFS2_STACK_LABEL_LEN) ||
1414 (strnlen(args[0].from,
1415 OCFS2_STACK_LABEL_LEN) !=
1416 OCFS2_STACK_LABEL_LEN)) {
1417 mlog(ML_ERROR,
1418 "Invalid cluster_stack option\n");
1419 status = 0;
1420 goto bail;
1421 }
1422 memcpy(mopt->cluster_stack, args[0].from,
1423 OCFS2_STACK_LABEL_LEN);
1424 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1425 /*
1426 * Open code the memcmp here as we don't have
1427 * an osb to pass to
1428 * ocfs2_userspace_stack().
1429 */
1430 if (memcmp(mopt->cluster_stack,
1431 OCFS2_CLASSIC_CLUSTER_STACK,
1432 OCFS2_STACK_LABEL_LEN))
1433 user_stack = 1;
1434 break;
1435 case Opt_inode64:
1436 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1437 break;
1438 case Opt_usrquota:
1439 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1440 break;
1441 case Opt_grpquota:
1442 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1443 break;
1444 case Opt_coherency_buffered:
1445 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1446 break;
1447 case Opt_coherency_full:
1448 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1449 break;
1450 case Opt_acl:
1451 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1452 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1453 break;
1454 case Opt_noacl:
1455 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1456 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1457 break;
1458 case Opt_resv_level:
1459 if (is_remount)
1460 break;
1461 if (match_int(&args[0], &option)) {
1462 status = 0;
1463 goto bail;
1464 }
1465 if (option >= OCFS2_MIN_RESV_LEVEL &&
1466 option < OCFS2_MAX_RESV_LEVEL)
1467 mopt->resv_level = option;
1468 break;
1469 case Opt_dir_resv_level:
1470 if (is_remount)
1471 break;
1472 if (match_int(&args[0], &option)) {
1473 status = 0;
1474 goto bail;
1475 }
1476 if (option >= OCFS2_MIN_RESV_LEVEL &&
1477 option < OCFS2_MAX_RESV_LEVEL)
1478 mopt->dir_resv_level = option;
1479 break;
1480 case Opt_journal_async_commit:
1481 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1482 break;
1483 default:
1484 mlog(ML_ERROR,
1485 "Unrecognized mount option \"%s\" "
1486 "or missing value\n", p);
1487 status = 0;
1488 goto bail;
1489 }
1490 }
1491
1492 if (user_stack == 0) {
1493 /* Ensure only one heartbeat mode */
1494 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1495 OCFS2_MOUNT_HB_GLOBAL |
1496 OCFS2_MOUNT_HB_NONE);
1497 if (hweight32(tmp) != 1) {
1498 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1499 status = 0;
1500 goto bail;
1501 }
1502 }
1503
1504 status = 1;
1505
1506 bail:
1507 return status;
1508 }
1509
1510 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1511 {
1512 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1513 unsigned long opts = osb->s_mount_opt;
1514 unsigned int local_alloc_megs;
1515
1516 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1517 seq_printf(s, ",_netdev");
1518 if (opts & OCFS2_MOUNT_HB_LOCAL)
1519 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1520 else
1521 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1522 } else
1523 seq_printf(s, ",%s", OCFS2_HB_NONE);
1524
1525 if (opts & OCFS2_MOUNT_NOINTR)
1526 seq_printf(s, ",nointr");
1527
1528 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1529 seq_printf(s, ",data=writeback");
1530 else
1531 seq_printf(s, ",data=ordered");
1532
1533 if (opts & OCFS2_MOUNT_BARRIER)
1534 seq_printf(s, ",barrier=1");
1535
1536 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1537 seq_printf(s, ",errors=panic");
1538 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1539 seq_printf(s, ",errors=continue");
1540 else
1541 seq_printf(s, ",errors=remount-ro");
1542
1543 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1544 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1545
1546 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1547
1548 if (osb->osb_commit_interval)
1549 seq_printf(s, ",commit=%u",
1550 (unsigned) (osb->osb_commit_interval / HZ));
1551
1552 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1553 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1554 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1555
1556 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1557 seq_printf(s, ",localflocks,");
1558
1559 if (osb->osb_cluster_stack[0])
1560 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1561 OCFS2_STACK_LABEL_LEN);
1562 if (opts & OCFS2_MOUNT_USRQUOTA)
1563 seq_printf(s, ",usrquota");
1564 if (opts & OCFS2_MOUNT_GRPQUOTA)
1565 seq_printf(s, ",grpquota");
1566
1567 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1568 seq_printf(s, ",coherency=buffered");
1569 else
1570 seq_printf(s, ",coherency=full");
1571
1572 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1573 seq_printf(s, ",nouser_xattr");
1574 else
1575 seq_printf(s, ",user_xattr");
1576
1577 if (opts & OCFS2_MOUNT_INODE64)
1578 seq_printf(s, ",inode64");
1579
1580 if (opts & OCFS2_MOUNT_POSIX_ACL)
1581 seq_printf(s, ",acl");
1582 else
1583 seq_printf(s, ",noacl");
1584
1585 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1586 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1587
1588 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1589 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1590
1591 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1592 seq_printf(s, ",journal_async_commit");
1593
1594 return 0;
1595 }
1596
1597 static int __init ocfs2_init(void)
1598 {
1599 int status;
1600
1601 status = init_ocfs2_uptodate_cache();
1602 if (status < 0)
1603 goto out1;
1604
1605 status = ocfs2_initialize_mem_caches();
1606 if (status < 0)
1607 goto out2;
1608
1609 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1610 if (!ocfs2_debugfs_root) {
1611 status = -ENOMEM;
1612 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1613 goto out3;
1614 }
1615
1616 ocfs2_set_locking_protocol();
1617
1618 status = register_quota_format(&ocfs2_quota_format);
1619 if (status < 0)
1620 goto out3;
1621 status = register_filesystem(&ocfs2_fs_type);
1622 if (!status)
1623 return 0;
1624
1625 unregister_quota_format(&ocfs2_quota_format);
1626 out3:
1627 debugfs_remove(ocfs2_debugfs_root);
1628 ocfs2_free_mem_caches();
1629 out2:
1630 exit_ocfs2_uptodate_cache();
1631 out1:
1632 mlog_errno(status);
1633 return status;
1634 }
1635
1636 static void __exit ocfs2_exit(void)
1637 {
1638 unregister_quota_format(&ocfs2_quota_format);
1639
1640 debugfs_remove(ocfs2_debugfs_root);
1641
1642 ocfs2_free_mem_caches();
1643
1644 unregister_filesystem(&ocfs2_fs_type);
1645
1646 exit_ocfs2_uptodate_cache();
1647 }
1648
1649 static void ocfs2_put_super(struct super_block *sb)
1650 {
1651 trace_ocfs2_put_super(sb);
1652
1653 ocfs2_sync_blockdev(sb);
1654 ocfs2_dismount_volume(sb, 0);
1655 ocfs2_filecheck_remove_sysfs(sb);
1656 }
1657
1658 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1659 {
1660 struct ocfs2_super *osb;
1661 u32 numbits, freebits;
1662 int status;
1663 struct ocfs2_dinode *bm_lock;
1664 struct buffer_head *bh = NULL;
1665 struct inode *inode = NULL;
1666
1667 trace_ocfs2_statfs(dentry->d_sb, buf);
1668
1669 osb = OCFS2_SB(dentry->d_sb);
1670
1671 inode = ocfs2_get_system_file_inode(osb,
1672 GLOBAL_BITMAP_SYSTEM_INODE,
1673 OCFS2_INVALID_SLOT);
1674 if (!inode) {
1675 mlog(ML_ERROR, "failed to get bitmap inode\n");
1676 status = -EIO;
1677 goto bail;
1678 }
1679
1680 status = ocfs2_inode_lock(inode, &bh, 0);
1681 if (status < 0) {
1682 mlog_errno(status);
1683 goto bail;
1684 }
1685
1686 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1687
1688 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1689 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1690
1691 buf->f_type = OCFS2_SUPER_MAGIC;
1692 buf->f_bsize = dentry->d_sb->s_blocksize;
1693 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1694 buf->f_blocks = ((sector_t) numbits) *
1695 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1696 buf->f_bfree = ((sector_t) freebits) *
1697 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1698 buf->f_bavail = buf->f_bfree;
1699 buf->f_files = numbits;
1700 buf->f_ffree = freebits;
1701 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1702 & 0xFFFFFFFFUL;
1703 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1704 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1705
1706 brelse(bh);
1707
1708 ocfs2_inode_unlock(inode, 0);
1709 status = 0;
1710 bail:
1711 iput(inode);
1712
1713 if (status)
1714 mlog_errno(status);
1715
1716 return status;
1717 }
1718
1719 static void ocfs2_inode_init_once(void *data)
1720 {
1721 struct ocfs2_inode_info *oi = data;
1722
1723 oi->ip_flags = 0;
1724 oi->ip_open_count = 0;
1725 spin_lock_init(&oi->ip_lock);
1726 ocfs2_extent_map_init(&oi->vfs_inode);
1727 INIT_LIST_HEAD(&oi->ip_io_markers);
1728 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1729 oi->ip_dir_start_lookup = 0;
1730 init_rwsem(&oi->ip_alloc_sem);
1731 init_rwsem(&oi->ip_xattr_sem);
1732 mutex_init(&oi->ip_io_mutex);
1733
1734 oi->ip_blkno = 0ULL;
1735 oi->ip_clusters = 0;
1736 oi->ip_next_orphan = NULL;
1737
1738 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1739
1740 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1741 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1742 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1743
1744 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1745 &ocfs2_inode_caching_ops);
1746
1747 inode_init_once(&oi->vfs_inode);
1748 }
1749
1750 static int ocfs2_initialize_mem_caches(void)
1751 {
1752 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1753 sizeof(struct ocfs2_inode_info),
1754 0,
1755 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1756 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1757 ocfs2_inode_init_once);
1758 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1759 sizeof(struct ocfs2_dquot),
1760 0,
1761 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1762 SLAB_MEM_SPREAD),
1763 NULL);
1764 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1765 sizeof(struct ocfs2_quota_chunk),
1766 0,
1767 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1768 NULL);
1769 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1770 !ocfs2_qf_chunk_cachep) {
1771 if (ocfs2_inode_cachep)
1772 kmem_cache_destroy(ocfs2_inode_cachep);
1773 if (ocfs2_dquot_cachep)
1774 kmem_cache_destroy(ocfs2_dquot_cachep);
1775 if (ocfs2_qf_chunk_cachep)
1776 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1777 return -ENOMEM;
1778 }
1779
1780 return 0;
1781 }
1782
1783 static void ocfs2_free_mem_caches(void)
1784 {
1785 /*
1786 * Make sure all delayed rcu free inodes are flushed before we
1787 * destroy cache.
1788 */
1789 rcu_barrier();
1790 if (ocfs2_inode_cachep)
1791 kmem_cache_destroy(ocfs2_inode_cachep);
1792 ocfs2_inode_cachep = NULL;
1793
1794 if (ocfs2_dquot_cachep)
1795 kmem_cache_destroy(ocfs2_dquot_cachep);
1796 ocfs2_dquot_cachep = NULL;
1797
1798 if (ocfs2_qf_chunk_cachep)
1799 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1800 ocfs2_qf_chunk_cachep = NULL;
1801 }
1802
1803 static int ocfs2_get_sector(struct super_block *sb,
1804 struct buffer_head **bh,
1805 int block,
1806 int sect_size)
1807 {
1808 if (!sb_set_blocksize(sb, sect_size)) {
1809 mlog(ML_ERROR, "unable to set blocksize\n");
1810 return -EIO;
1811 }
1812
1813 *bh = sb_getblk(sb, block);
1814 if (!*bh) {
1815 mlog_errno(-ENOMEM);
1816 return -ENOMEM;
1817 }
1818 lock_buffer(*bh);
1819 if (!buffer_dirty(*bh))
1820 clear_buffer_uptodate(*bh);
1821 unlock_buffer(*bh);
1822 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1823 wait_on_buffer(*bh);
1824 if (!buffer_uptodate(*bh)) {
1825 mlog_errno(-EIO);
1826 brelse(*bh);
1827 *bh = NULL;
1828 return -EIO;
1829 }
1830
1831 return 0;
1832 }
1833
1834 static int ocfs2_mount_volume(struct super_block *sb)
1835 {
1836 int status = 0;
1837 int unlock_super = 0;
1838 struct ocfs2_super *osb = OCFS2_SB(sb);
1839
1840 if (ocfs2_is_hard_readonly(osb))
1841 goto leave;
1842
1843 status = ocfs2_dlm_init(osb);
1844 if (status < 0) {
1845 mlog_errno(status);
1846 goto leave;
1847 }
1848
1849 status = ocfs2_super_lock(osb, 1);
1850 if (status < 0) {
1851 mlog_errno(status);
1852 goto leave;
1853 }
1854 unlock_super = 1;
1855
1856 /* This will load up the node map and add ourselves to it. */
1857 status = ocfs2_find_slot(osb);
1858 if (status < 0) {
1859 mlog_errno(status);
1860 goto leave;
1861 }
1862
1863 /* load all node-local system inodes */
1864 status = ocfs2_init_local_system_inodes(osb);
1865 if (status < 0) {
1866 mlog_errno(status);
1867 goto leave;
1868 }
1869
1870 status = ocfs2_check_volume(osb);
1871 if (status < 0) {
1872 mlog_errno(status);
1873 goto leave;
1874 }
1875
1876 status = ocfs2_truncate_log_init(osb);
1877 if (status < 0)
1878 mlog_errno(status);
1879
1880 leave:
1881 if (unlock_super)
1882 ocfs2_super_unlock(osb, 1);
1883
1884 return status;
1885 }
1886
1887 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1888 {
1889 int tmp, hangup_needed = 0;
1890 struct ocfs2_super *osb = NULL;
1891 char nodestr[12];
1892
1893 trace_ocfs2_dismount_volume(sb);
1894
1895 BUG_ON(!sb);
1896 osb = OCFS2_SB(sb);
1897 BUG_ON(!osb);
1898
1899 debugfs_remove(osb->osb_ctxt);
1900
1901 /* Orphan scan should be stopped as early as possible */
1902 ocfs2_orphan_scan_stop(osb);
1903
1904 ocfs2_disable_quotas(osb);
1905
1906 /* All dquots should be freed by now */
1907 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1908 /* Wait for worker to be done with the work structure in osb */
1909 cancel_work_sync(&osb->dquot_drop_work);
1910
1911 ocfs2_shutdown_local_alloc(osb);
1912
1913 ocfs2_truncate_log_shutdown(osb);
1914
1915 /* This will disable recovery and flush any recovery work. */
1916 ocfs2_recovery_exit(osb);
1917
1918 ocfs2_journal_shutdown(osb);
1919
1920 ocfs2_sync_blockdev(sb);
1921
1922 ocfs2_purge_refcount_trees(osb);
1923
1924 /* No cluster connection means we've failed during mount, so skip
1925 * all the steps which depended on that to complete. */
1926 if (osb->cconn) {
1927 tmp = ocfs2_super_lock(osb, 1);
1928 if (tmp < 0) {
1929 mlog_errno(tmp);
1930 return;
1931 }
1932 }
1933
1934 if (osb->slot_num != OCFS2_INVALID_SLOT)
1935 ocfs2_put_slot(osb);
1936
1937 if (osb->cconn)
1938 ocfs2_super_unlock(osb, 1);
1939
1940 ocfs2_release_system_inodes(osb);
1941
1942 /*
1943 * If we're dismounting due to mount error, mount.ocfs2 will clean
1944 * up heartbeat. If we're a local mount, there is no heartbeat.
1945 * If we failed before we got a uuid_str yet, we can't stop
1946 * heartbeat. Otherwise, do it.
1947 */
1948 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1949 !ocfs2_is_hard_readonly(osb))
1950 hangup_needed = 1;
1951
1952 if (osb->cconn)
1953 ocfs2_dlm_shutdown(osb, hangup_needed);
1954
1955 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1956 debugfs_remove(osb->osb_debug_root);
1957
1958 if (hangup_needed)
1959 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1960
1961 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1962
1963 if (ocfs2_mount_local(osb))
1964 snprintf(nodestr, sizeof(nodestr), "local");
1965 else
1966 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1967
1968 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1969 osb->dev_str, nodestr);
1970
1971 ocfs2_delete_osb(osb);
1972 kfree(osb);
1973 sb->s_dev = 0;
1974 sb->s_fs_info = NULL;
1975 }
1976
1977 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1978 unsigned uuid_bytes)
1979 {
1980 int i, ret;
1981 char *ptr;
1982
1983 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1984
1985 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1986 if (osb->uuid_str == NULL)
1987 return -ENOMEM;
1988
1989 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1990 /* print with null */
1991 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1992 if (ret != 2) /* drop super cleans up */
1993 return -EINVAL;
1994 /* then only advance past the last char */
1995 ptr += 2;
1996 }
1997
1998 return 0;
1999 }
2000
2001 /* Make sure entire volume is addressable by our journal. Requires
2002 osb_clusters_at_boot to be valid and for the journal to have been
2003 initialized by ocfs2_journal_init(). */
2004 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2005 {
2006 int status = 0;
2007 u64 max_block =
2008 ocfs2_clusters_to_blocks(osb->sb,
2009 osb->osb_clusters_at_boot) - 1;
2010
2011 /* 32-bit block number is always OK. */
2012 if (max_block <= (u32)~0ULL)
2013 goto out;
2014
2015 /* Volume is "huge", so see if our journal is new enough to
2016 support it. */
2017 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2018 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2019 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2020 JBD2_FEATURE_INCOMPAT_64BIT))) {
2021 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2022 "Enable the 'block64' journal option with tunefs.ocfs2");
2023 status = -EFBIG;
2024 goto out;
2025 }
2026
2027 out:
2028 return status;
2029 }
2030
2031 static int ocfs2_initialize_super(struct super_block *sb,
2032 struct buffer_head *bh,
2033 int sector_size,
2034 struct ocfs2_blockcheck_stats *stats)
2035 {
2036 int status;
2037 int i, cbits, bbits;
2038 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2039 struct inode *inode = NULL;
2040 struct ocfs2_journal *journal;
2041 struct ocfs2_super *osb;
2042 u64 total_blocks;
2043
2044 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2045 if (!osb) {
2046 status = -ENOMEM;
2047 mlog_errno(status);
2048 goto bail;
2049 }
2050
2051 sb->s_fs_info = osb;
2052 sb->s_op = &ocfs2_sops;
2053 sb->s_d_op = &ocfs2_dentry_ops;
2054 sb->s_export_op = &ocfs2_export_ops;
2055 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2056 sb->dq_op = &ocfs2_quota_operations;
2057 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2058 sb->s_xattr = ocfs2_xattr_handlers;
2059 sb->s_time_gran = 1;
2060 sb->s_flags |= MS_NOATIME;
2061 /* this is needed to support O_LARGEFILE */
2062 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2063 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2064 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2065 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2066 sizeof(di->id2.i_super.s_uuid));
2067
2068 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2069
2070 for (i = 0; i < 3; i++)
2071 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2072 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2073
2074 osb->sb = sb;
2075 osb->s_sectsize_bits = blksize_bits(sector_size);
2076 BUG_ON(!osb->s_sectsize_bits);
2077
2078 spin_lock_init(&osb->dc_task_lock);
2079 init_waitqueue_head(&osb->dc_event);
2080 osb->dc_work_sequence = 0;
2081 osb->dc_wake_sequence = 0;
2082 INIT_LIST_HEAD(&osb->blocked_lock_list);
2083 osb->blocked_lock_count = 0;
2084 spin_lock_init(&osb->osb_lock);
2085 spin_lock_init(&osb->osb_xattr_lock);
2086 ocfs2_init_steal_slots(osb);
2087
2088 mutex_init(&osb->system_file_mutex);
2089
2090 atomic_set(&osb->alloc_stats.moves, 0);
2091 atomic_set(&osb->alloc_stats.local_data, 0);
2092 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2093 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2094 atomic_set(&osb->alloc_stats.bg_extends, 0);
2095
2096 /* Copy the blockcheck stats from the superblock probe */
2097 osb->osb_ecc_stats = *stats;
2098
2099 ocfs2_init_node_maps(osb);
2100
2101 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2102 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2103
2104 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2105 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2106 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2107 osb->max_slots);
2108 status = -EINVAL;
2109 goto bail;
2110 }
2111
2112 ocfs2_orphan_scan_init(osb);
2113
2114 status = ocfs2_recovery_init(osb);
2115 if (status) {
2116 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2117 mlog_errno(status);
2118 goto bail;
2119 }
2120
2121 init_waitqueue_head(&osb->checkpoint_event);
2122
2123 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2124
2125 osb->slot_num = OCFS2_INVALID_SLOT;
2126
2127 osb->s_xattr_inline_size = le16_to_cpu(
2128 di->id2.i_super.s_xattr_inline_size);
2129
2130 osb->local_alloc_state = OCFS2_LA_UNUSED;
2131 osb->local_alloc_bh = NULL;
2132 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2133
2134 init_waitqueue_head(&osb->osb_mount_event);
2135
2136 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2137 if (status) {
2138 mlog_errno(status);
2139 goto bail;
2140 }
2141
2142 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2143 if (!osb->vol_label) {
2144 mlog(ML_ERROR, "unable to alloc vol label\n");
2145 status = -ENOMEM;
2146 goto bail;
2147 }
2148
2149 osb->slot_recovery_generations =
2150 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2151 GFP_KERNEL);
2152 if (!osb->slot_recovery_generations) {
2153 status = -ENOMEM;
2154 mlog_errno(status);
2155 goto bail;
2156 }
2157
2158 init_waitqueue_head(&osb->osb_wipe_event);
2159 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2160 sizeof(*osb->osb_orphan_wipes),
2161 GFP_KERNEL);
2162 if (!osb->osb_orphan_wipes) {
2163 status = -ENOMEM;
2164 mlog_errno(status);
2165 goto bail;
2166 }
2167
2168 osb->osb_rf_lock_tree = RB_ROOT;
2169
2170 osb->s_feature_compat =
2171 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2172 osb->s_feature_ro_compat =
2173 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2174 osb->s_feature_incompat =
2175 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2176
2177 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2178 mlog(ML_ERROR, "couldn't mount because of unsupported "
2179 "optional features (%x).\n", i);
2180 status = -EINVAL;
2181 goto bail;
2182 }
2183 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2184 mlog(ML_ERROR, "couldn't mount RDWR because of "
2185 "unsupported optional features (%x).\n", i);
2186 status = -EINVAL;
2187 goto bail;
2188 }
2189
2190 if (ocfs2_clusterinfo_valid(osb)) {
2191 osb->osb_stackflags =
2192 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2193 strlcpy(osb->osb_cluster_stack,
2194 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2195 OCFS2_STACK_LABEL_LEN + 1);
2196 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2197 mlog(ML_ERROR,
2198 "couldn't mount because of an invalid "
2199 "cluster stack label (%s) \n",
2200 osb->osb_cluster_stack);
2201 status = -EINVAL;
2202 goto bail;
2203 }
2204 strlcpy(osb->osb_cluster_name,
2205 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2206 OCFS2_CLUSTER_NAME_LEN + 1);
2207 } else {
2208 /* The empty string is identical with classic tools that
2209 * don't know about s_cluster_info. */
2210 osb->osb_cluster_stack[0] = '\0';
2211 }
2212
2213 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2214
2215 /* FIXME
2216 * This should be done in ocfs2_journal_init(), but unknown
2217 * ordering issues will cause the filesystem to crash.
2218 * If anyone wants to figure out what part of the code
2219 * refers to osb->journal before ocfs2_journal_init() is run,
2220 * be my guest.
2221 */
2222 /* initialize our journal structure */
2223
2224 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2225 if (!journal) {
2226 mlog(ML_ERROR, "unable to alloc journal\n");
2227 status = -ENOMEM;
2228 goto bail;
2229 }
2230 osb->journal = journal;
2231 journal->j_osb = osb;
2232
2233 atomic_set(&journal->j_num_trans, 0);
2234 init_rwsem(&journal->j_trans_barrier);
2235 init_waitqueue_head(&journal->j_checkpointed);
2236 spin_lock_init(&journal->j_lock);
2237 journal->j_trans_id = (unsigned long) 1;
2238 INIT_LIST_HEAD(&journal->j_la_cleanups);
2239 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2240 journal->j_state = OCFS2_JOURNAL_FREE;
2241
2242 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2243 init_llist_head(&osb->dquot_drop_list);
2244
2245 /* get some pseudo constants for clustersize bits */
2246 osb->s_clustersize_bits =
2247 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2248 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2249
2250 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2251 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2252 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2253 osb->s_clustersize);
2254 status = -EINVAL;
2255 goto bail;
2256 }
2257
2258 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2259 le32_to_cpu(di->i_clusters));
2260
2261 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2262 total_blocks);
2263 if (status) {
2264 mlog(ML_ERROR, "Volume too large "
2265 "to mount safely on this system");
2266 status = -EFBIG;
2267 goto bail;
2268 }
2269
2270 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2271 sizeof(di->id2.i_super.s_uuid))) {
2272 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2273 status = -ENOMEM;
2274 goto bail;
2275 }
2276
2277 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2278 OCFS2_MAX_VOL_LABEL_LEN);
2279 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2280 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2281 osb->first_cluster_group_blkno =
2282 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2283 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2284 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2285 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2286 (unsigned long long)osb->root_blkno,
2287 (unsigned long long)osb->system_dir_blkno,
2288 osb->s_clustersize_bits);
2289
2290 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2291 if (!osb->osb_dlm_debug) {
2292 status = -ENOMEM;
2293 mlog_errno(status);
2294 goto bail;
2295 }
2296
2297 atomic_set(&osb->vol_state, VOLUME_INIT);
2298
2299 /* load root, system_dir, and all global system inodes */
2300 status = ocfs2_init_global_system_inodes(osb);
2301 if (status < 0) {
2302 mlog_errno(status);
2303 goto bail;
2304 }
2305
2306 /*
2307 * global bitmap
2308 */
2309 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2310 OCFS2_INVALID_SLOT);
2311 if (!inode) {
2312 status = -EINVAL;
2313 mlog_errno(status);
2314 goto bail;
2315 }
2316
2317 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2318 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2319 iput(inode);
2320
2321 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2322 osb->s_feature_incompat) * 8;
2323
2324 status = ocfs2_init_slot_info(osb);
2325 if (status < 0) {
2326 mlog_errno(status);
2327 goto bail;
2328 }
2329 cleancache_init_shared_fs(sb);
2330
2331 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2332 if (!osb->ocfs2_wq) {
2333 status = -ENOMEM;
2334 mlog_errno(status);
2335 }
2336
2337 bail:
2338 return status;
2339 }
2340
2341 /*
2342 * will return: -EAGAIN if it is ok to keep searching for superblocks
2343 * -EINVAL if there is a bad superblock
2344 * 0 on success
2345 */
2346 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2347 struct buffer_head *bh,
2348 u32 blksz,
2349 struct ocfs2_blockcheck_stats *stats)
2350 {
2351 int status = -EAGAIN;
2352
2353 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2354 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2355 /* We have to do a raw check of the feature here */
2356 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2357 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2358 status = ocfs2_block_check_validate(bh->b_data,
2359 bh->b_size,
2360 &di->i_check,
2361 stats);
2362 if (status)
2363 goto out;
2364 }
2365 status = -EINVAL;
2366 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2367 mlog(ML_ERROR, "found superblock with incorrect block "
2368 "size: found %u, should be %u\n",
2369 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2370 blksz);
2371 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2372 OCFS2_MAJOR_REV_LEVEL ||
2373 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2374 OCFS2_MINOR_REV_LEVEL) {
2375 mlog(ML_ERROR, "found superblock with bad version: "
2376 "found %u.%u, should be %u.%u\n",
2377 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2378 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2379 OCFS2_MAJOR_REV_LEVEL,
2380 OCFS2_MINOR_REV_LEVEL);
2381 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2382 mlog(ML_ERROR, "bad block number on superblock: "
2383 "found %llu, should be %llu\n",
2384 (unsigned long long)le64_to_cpu(di->i_blkno),
2385 (unsigned long long)bh->b_blocknr);
2386 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2387 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2388 mlog(ML_ERROR, "bad cluster size found: %u\n",
2389 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2390 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2391 mlog(ML_ERROR, "bad root_blkno: 0\n");
2392 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2393 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2394 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2395 mlog(ML_ERROR,
2396 "Superblock slots found greater than file system "
2397 "maximum: found %u, max %u\n",
2398 le16_to_cpu(di->id2.i_super.s_max_slots),
2399 OCFS2_MAX_SLOTS);
2400 } else {
2401 /* found it! */
2402 status = 0;
2403 }
2404 }
2405
2406 out:
2407 if (status && status != -EAGAIN)
2408 mlog_errno(status);
2409 return status;
2410 }
2411
2412 static int ocfs2_check_volume(struct ocfs2_super *osb)
2413 {
2414 int status;
2415 int dirty;
2416 int local;
2417 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2418 * recover
2419 * ourselves. */
2420
2421 /* Init our journal object. */
2422 status = ocfs2_journal_init(osb->journal, &dirty);
2423 if (status < 0) {
2424 mlog(ML_ERROR, "Could not initialize journal!\n");
2425 goto finally;
2426 }
2427
2428 /* Now that journal has been initialized, check to make sure
2429 entire volume is addressable. */
2430 status = ocfs2_journal_addressable(osb);
2431 if (status)
2432 goto finally;
2433
2434 /* If the journal was unmounted cleanly then we don't want to
2435 * recover anything. Otherwise, journal_load will do that
2436 * dirty work for us :) */
2437 if (!dirty) {
2438 status = ocfs2_journal_wipe(osb->journal, 0);
2439 if (status < 0) {
2440 mlog_errno(status);
2441 goto finally;
2442 }
2443 } else {
2444 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2445 "unmounted cleanly, recovering it.\n", osb->dev_str);
2446 }
2447
2448 local = ocfs2_mount_local(osb);
2449
2450 /* will play back anything left in the journal. */
2451 status = ocfs2_journal_load(osb->journal, local, dirty);
2452 if (status < 0) {
2453 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2454 goto finally;
2455 }
2456
2457 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2458 jbd2_journal_set_features(osb->journal->j_journal,
2459 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2460 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2461 else
2462 jbd2_journal_clear_features(osb->journal->j_journal,
2463 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2464 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2465
2466 if (dirty) {
2467 /* recover my local alloc if we didn't unmount cleanly. */
2468 status = ocfs2_begin_local_alloc_recovery(osb,
2469 osb->slot_num,
2470 &local_alloc);
2471 if (status < 0) {
2472 mlog_errno(status);
2473 goto finally;
2474 }
2475 /* we complete the recovery process after we've marked
2476 * ourselves as mounted. */
2477 }
2478
2479 status = ocfs2_load_local_alloc(osb);
2480 if (status < 0) {
2481 mlog_errno(status);
2482 goto finally;
2483 }
2484
2485 if (dirty) {
2486 /* Recovery will be completed after we've mounted the
2487 * rest of the volume. */
2488 osb->local_alloc_copy = local_alloc;
2489 local_alloc = NULL;
2490 }
2491
2492 /* go through each journal, trylock it and if you get the
2493 * lock, and it's marked as dirty, set the bit in the recover
2494 * map and launch a recovery thread for it. */
2495 status = ocfs2_mark_dead_nodes(osb);
2496 if (status < 0) {
2497 mlog_errno(status);
2498 goto finally;
2499 }
2500
2501 status = ocfs2_compute_replay_slots(osb);
2502 if (status < 0)
2503 mlog_errno(status);
2504
2505 finally:
2506 kfree(local_alloc);
2507
2508 if (status)
2509 mlog_errno(status);
2510 return status;
2511 }
2512
2513 /*
2514 * The routine gets called from dismount or close whenever a dismount on
2515 * volume is requested and the osb open count becomes 1.
2516 * It will remove the osb from the global list and also free up all the
2517 * initialized resources and fileobject.
2518 */
2519 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2520 {
2521 /* This function assumes that the caller has the main osb resource */
2522
2523 /* ocfs2_initializer_super have already created this workqueue */
2524 if (osb->ocfs2_wq) {
2525 flush_workqueue(osb->ocfs2_wq);
2526 destroy_workqueue(osb->ocfs2_wq);
2527 }
2528
2529 ocfs2_free_slot_info(osb);
2530
2531 kfree(osb->osb_orphan_wipes);
2532 kfree(osb->slot_recovery_generations);
2533 /* FIXME
2534 * This belongs in journal shutdown, but because we have to
2535 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2536 * we free it here.
2537 */
2538 kfree(osb->journal);
2539 kfree(osb->local_alloc_copy);
2540 kfree(osb->uuid_str);
2541 kfree(osb->vol_label);
2542 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2543 memset(osb, 0, sizeof(struct ocfs2_super));
2544 }
2545
2546 /* Depending on the mount option passed, perform one of the following:
2547 * Put OCFS2 into a readonly state (default)
2548 * Return EIO so that only the process errs
2549 * Fix the error as if fsck.ocfs2 -y
2550 * panic
2551 */
2552 static int ocfs2_handle_error(struct super_block *sb)
2553 {
2554 struct ocfs2_super *osb = OCFS2_SB(sb);
2555 int rv = 0;
2556
2557 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2558 pr_crit("On-disk corruption discovered. "
2559 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2560
2561 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2562 panic("OCFS2: (device %s): panic forced after error\n",
2563 sb->s_id);
2564 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2565 pr_crit("OCFS2: Returning error to the calling process.\n");
2566 rv = -EIO;
2567 } else { /* default option */
2568 rv = -EROFS;
2569 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2570 return rv;
2571
2572 pr_crit("OCFS2: File system is now read-only.\n");
2573 sb->s_flags |= MS_RDONLY;
2574 ocfs2_set_ro_flag(osb, 0);
2575 }
2576
2577 return rv;
2578 }
2579
2580 int __ocfs2_error(struct super_block *sb, const char *function,
2581 const char *fmt, ...)
2582 {
2583 struct va_format vaf;
2584 va_list args;
2585
2586 va_start(args, fmt);
2587 vaf.fmt = fmt;
2588 vaf.va = &args;
2589
2590 /* Not using mlog here because we want to show the actual
2591 * function the error came from. */
2592 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2593 sb->s_id, function, &vaf);
2594
2595 va_end(args);
2596
2597 return ocfs2_handle_error(sb);
2598 }
2599
2600 /* Handle critical errors. This is intentionally more drastic than
2601 * ocfs2_handle_error, so we only use for things like journal errors,
2602 * etc. */
2603 void __ocfs2_abort(struct super_block *sb, const char *function,
2604 const char *fmt, ...)
2605 {
2606 struct va_format vaf;
2607 va_list args;
2608
2609 va_start(args, fmt);
2610
2611 vaf.fmt = fmt;
2612 vaf.va = &args;
2613
2614 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2615 sb->s_id, function, &vaf);
2616
2617 va_end(args);
2618
2619 /* We don't have the cluster support yet to go straight to
2620 * hard readonly in here. Until then, we want to keep
2621 * ocfs2_abort() so that we can at least mark critical
2622 * errors.
2623 *
2624 * TODO: This should abort the journal and alert other nodes
2625 * that our slot needs recovery. */
2626
2627 /* Force a panic(). This stinks, but it's better than letting
2628 * things continue without having a proper hard readonly
2629 * here. */
2630 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2631 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2632 ocfs2_handle_error(sb);
2633 }
2634
2635 /*
2636 * Void signal blockers, because in-kernel sigprocmask() only fails
2637 * when SIG_* is wrong.
2638 */
2639 void ocfs2_block_signals(sigset_t *oldset)
2640 {
2641 int rc;
2642 sigset_t blocked;
2643
2644 sigfillset(&blocked);
2645 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2646 BUG_ON(rc);
2647 }
2648
2649 void ocfs2_unblock_signals(sigset_t *oldset)
2650 {
2651 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2652 BUG_ON(rc);
2653 }
2654
2655 module_init(ocfs2_init);
2656 module_exit(ocfs2_exit);
Linux with added FPC-III support