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ocfs2: fix NULL pointer dereference when dismount and ocfs2rec simultaneously
[deliverable/linux.git] / fs / ocfs2 / super.c
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
46 #define CREATE_TRACE_POINTS
47 #include "ocfs2_trace.h"
48
49 #include <cluster/masklog.h>
50
51 #include "ocfs2.h"
52
53 /* this should be the only file to include a version 1 header */
54 #include "ocfs1_fs_compat.h"
55
56 #include "alloc.h"
57 #include "aops.h"
58 #include "blockcheck.h"
59 #include "dlmglue.h"
60 #include "export.h"
61 #include "extent_map.h"
62 #include "heartbeat.h"
63 #include "inode.h"
64 #include "journal.h"
65 #include "localalloc.h"
66 #include "namei.h"
67 #include "slot_map.h"
68 #include "super.h"
69 #include "sysfile.h"
70 #include "uptodate.h"
71 #include "xattr.h"
72 #include "quota.h"
73 #include "refcounttree.h"
74 #include "suballoc.h"
75
76 #include "buffer_head_io.h"
77
78 static struct kmem_cache *ocfs2_inode_cachep = NULL;
79 struct kmem_cache *ocfs2_dquot_cachep;
80 struct kmem_cache *ocfs2_qf_chunk_cachep;
81
82 /* OCFS2 needs to schedule several different types of work which
83 * require cluster locking, disk I/O, recovery waits, etc. Since these
84 * types of work tend to be heavy we avoid using the kernel events
85 * workqueue and schedule on our own. */
86 struct workqueue_struct *ocfs2_wq = NULL;
87
88 static struct dentry *ocfs2_debugfs_root = NULL;
89
90 MODULE_AUTHOR("Oracle");
91 MODULE_LICENSE("GPL");
92 MODULE_DESCRIPTION("OCFS2 cluster file system");
93
94 struct mount_options
95 {
96 unsigned long commit_interval;
97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
100 int localalloc_opt;
101 unsigned int resv_level;
102 int dir_resv_level;
103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
104 };
105
106 static int ocfs2_parse_options(struct super_block *sb, char *options,
107 struct mount_options *mopt,
108 int is_remount);
109 static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
112 static void ocfs2_put_super(struct super_block *sb);
113 static int ocfs2_mount_volume(struct super_block *sb);
114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116 static int ocfs2_initialize_mem_caches(void);
117 static void ocfs2_free_mem_caches(void);
118 static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
121
122 static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
127 static int ocfs2_check_volume(struct ocfs2_super *osb);
128 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
136 static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
140 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141 static void ocfs2_destroy_inode(struct inode *inode);
142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
145
146 static const struct super_operations ocfs2_sops = {
147 .statfs = ocfs2_statfs,
148 .alloc_inode = ocfs2_alloc_inode,
149 .destroy_inode = ocfs2_destroy_inode,
150 .drop_inode = ocfs2_drop_inode,
151 .evict_inode = ocfs2_evict_inode,
152 .sync_fs = ocfs2_sync_fs,
153 .put_super = ocfs2_put_super,
154 .remount_fs = ocfs2_remount,
155 .show_options = ocfs2_show_options,
156 .quota_read = ocfs2_quota_read,
157 .quota_write = ocfs2_quota_write,
158 };
159
160 enum {
161 Opt_barrier,
162 Opt_err_panic,
163 Opt_err_ro,
164 Opt_intr,
165 Opt_nointr,
166 Opt_hb_none,
167 Opt_hb_local,
168 Opt_hb_global,
169 Opt_data_ordered,
170 Opt_data_writeback,
171 Opt_atime_quantum,
172 Opt_slot,
173 Opt_commit,
174 Opt_localalloc,
175 Opt_localflocks,
176 Opt_stack,
177 Opt_user_xattr,
178 Opt_nouser_xattr,
179 Opt_inode64,
180 Opt_acl,
181 Opt_noacl,
182 Opt_usrquota,
183 Opt_grpquota,
184 Opt_coherency_buffered,
185 Opt_coherency_full,
186 Opt_resv_level,
187 Opt_dir_resv_level,
188 Opt_err,
189 };
190
191 static const match_table_t tokens = {
192 {Opt_barrier, "barrier=%u"},
193 {Opt_err_panic, "errors=panic"},
194 {Opt_err_ro, "errors=remount-ro"},
195 {Opt_intr, "intr"},
196 {Opt_nointr, "nointr"},
197 {Opt_hb_none, OCFS2_HB_NONE},
198 {Opt_hb_local, OCFS2_HB_LOCAL},
199 {Opt_hb_global, OCFS2_HB_GLOBAL},
200 {Opt_data_ordered, "data=ordered"},
201 {Opt_data_writeback, "data=writeback"},
202 {Opt_atime_quantum, "atime_quantum=%u"},
203 {Opt_slot, "preferred_slot=%u"},
204 {Opt_commit, "commit=%u"},
205 {Opt_localalloc, "localalloc=%d"},
206 {Opt_localflocks, "localflocks"},
207 {Opt_stack, "cluster_stack=%s"},
208 {Opt_user_xattr, "user_xattr"},
209 {Opt_nouser_xattr, "nouser_xattr"},
210 {Opt_inode64, "inode64"},
211 {Opt_acl, "acl"},
212 {Opt_noacl, "noacl"},
213 {Opt_usrquota, "usrquota"},
214 {Opt_grpquota, "grpquota"},
215 {Opt_coherency_buffered, "coherency=buffered"},
216 {Opt_coherency_full, "coherency=full"},
217 {Opt_resv_level, "resv_level=%u"},
218 {Opt_dir_resv_level, "dir_resv_level=%u"},
219 {Opt_err, NULL}
220 };
221
222 #ifdef CONFIG_DEBUG_FS
223 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
224 {
225 struct ocfs2_cluster_connection *cconn = osb->cconn;
226 struct ocfs2_recovery_map *rm = osb->recovery_map;
227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
228 int i, out = 0;
229
230 out += snprintf(buf + out, len - out,
231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
232 "Device", osb->dev_str, osb->uuid_str,
233 osb->fs_generation, osb->vol_label);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => State: %d Flags: 0x%lX\n", "Volume",
237 atomic_read(&osb->vol_state), osb->osb_flags);
238
239 out += snprintf(buf + out, len - out,
240 "%10s => Block: %lu Cluster: %d\n", "Sizes",
241 osb->sb->s_blocksize, osb->s_clustersize);
242
243 out += snprintf(buf + out, len - out,
244 "%10s => Compat: 0x%X Incompat: 0x%X "
245 "ROcompat: 0x%X\n",
246 "Features", osb->s_feature_compat,
247 osb->s_feature_incompat, osb->s_feature_ro_compat);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
251 osb->s_mount_opt, osb->s_atime_quantum);
252
253 if (cconn) {
254 out += snprintf(buf + out, len - out,
255 "%10s => Stack: %s Name: %*s "
256 "Version: %d.%d\n", "Cluster",
257 (*osb->osb_cluster_stack == '\0' ?
258 "o2cb" : osb->osb_cluster_stack),
259 cconn->cc_namelen, cconn->cc_name,
260 cconn->cc_version.pv_major,
261 cconn->cc_version.pv_minor);
262 }
263
264 spin_lock(&osb->dc_task_lock);
265 out += snprintf(buf + out, len - out,
266 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
267 "WorkSeq: %lu\n", "DownCnvt",
268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
269 osb->blocked_lock_count, osb->dc_wake_sequence,
270 osb->dc_work_sequence);
271 spin_unlock(&osb->dc_task_lock);
272
273 spin_lock(&osb->osb_lock);
274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
275 "Recovery",
276 (osb->recovery_thread_task ?
277 task_pid_nr(osb->recovery_thread_task) : -1));
278 if (rm->rm_used == 0)
279 out += snprintf(buf + out, len - out, " None\n");
280 else {
281 for (i = 0; i < rm->rm_used; i++)
282 out += snprintf(buf + out, len - out, " %d",
283 rm->rm_entries[i]);
284 out += snprintf(buf + out, len - out, "\n");
285 }
286 spin_unlock(&osb->osb_lock);
287
288 out += snprintf(buf + out, len - out,
289 "%10s => Pid: %d Interval: %lu\n", "Commit",
290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
291 osb->osb_commit_interval);
292
293 out += snprintf(buf + out, len - out,
294 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
295 "Journal", osb->journal->j_state,
296 osb->journal->j_trans_id,
297 atomic_read(&osb->journal->j_num_trans));
298
299 out += snprintf(buf + out, len - out,
300 "%10s => GlobalAllocs: %d LocalAllocs: %d "
301 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
302 "Stats",
303 atomic_read(&osb->alloc_stats.bitmap_data),
304 atomic_read(&osb->alloc_stats.local_data),
305 atomic_read(&osb->alloc_stats.bg_allocs),
306 atomic_read(&osb->alloc_stats.moves),
307 atomic_read(&osb->alloc_stats.bg_extends));
308
309 out += snprintf(buf + out, len - out,
310 "%10s => State: %u Descriptor: %llu Size: %u bits "
311 "Default: %u bits\n",
312 "LocalAlloc", osb->local_alloc_state,
313 (unsigned long long)osb->la_last_gd,
314 osb->local_alloc_bits, osb->local_alloc_default_bits);
315
316 spin_lock(&osb->osb_lock);
317 out += snprintf(buf + out, len - out,
318 "%10s => InodeSlot: %d StolenInodes: %d, "
319 "MetaSlot: %d StolenMeta: %d\n", "Steal",
320 osb->s_inode_steal_slot,
321 atomic_read(&osb->s_num_inodes_stolen),
322 osb->s_meta_steal_slot,
323 atomic_read(&osb->s_num_meta_stolen));
324 spin_unlock(&osb->osb_lock);
325
326 out += snprintf(buf + out, len - out, "OrphanScan => ");
327 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
328 os->os_count, os->os_seqno);
329 out += snprintf(buf + out, len - out, " Last Scan: ");
330 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
331 out += snprintf(buf + out, len - out, "Disabled\n");
332 else
333 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
334 (get_seconds() - os->os_scantime.tv_sec));
335
336 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
337 "Slots", "Num", "RecoGen");
338 for (i = 0; i < osb->max_slots; ++i) {
339 out += snprintf(buf + out, len - out,
340 "%10s %c %3d %10d\n",
341 " ",
342 (i == osb->slot_num ? '*' : ' '),
343 i, osb->slot_recovery_generations[i]);
344 }
345
346 return out;
347 }
348
349 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
350 {
351 struct ocfs2_super *osb = inode->i_private;
352 char *buf = NULL;
353
354 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
355 if (!buf)
356 goto bail;
357
358 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
359
360 file->private_data = buf;
361
362 return 0;
363 bail:
364 return -ENOMEM;
365 }
366
367 static int ocfs2_debug_release(struct inode *inode, struct file *file)
368 {
369 kfree(file->private_data);
370 return 0;
371 }
372
373 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
374 size_t nbytes, loff_t *ppos)
375 {
376 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
377 i_size_read(file->f_mapping->host));
378 }
379 #else
380 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
381 {
382 return 0;
383 }
384 static int ocfs2_debug_release(struct inode *inode, struct file *file)
385 {
386 return 0;
387 }
388 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
389 size_t nbytes, loff_t *ppos)
390 {
391 return 0;
392 }
393 #endif /* CONFIG_DEBUG_FS */
394
395 static const struct file_operations ocfs2_osb_debug_fops = {
396 .open = ocfs2_osb_debug_open,
397 .release = ocfs2_debug_release,
398 .read = ocfs2_debug_read,
399 .llseek = generic_file_llseek,
400 };
401
402 static int ocfs2_sync_fs(struct super_block *sb, int wait)
403 {
404 int status;
405 tid_t target;
406 struct ocfs2_super *osb = OCFS2_SB(sb);
407
408 if (ocfs2_is_hard_readonly(osb))
409 return -EROFS;
410
411 if (wait) {
412 status = ocfs2_flush_truncate_log(osb);
413 if (status < 0)
414 mlog_errno(status);
415 } else {
416 ocfs2_schedule_truncate_log_flush(osb, 0);
417 }
418
419 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
420 &target)) {
421 if (wait)
422 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
423 target);
424 }
425 return 0;
426 }
427
428 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
429 {
430 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
431 && (ino == USER_QUOTA_SYSTEM_INODE
432 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
433 return 0;
434 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
435 && (ino == GROUP_QUOTA_SYSTEM_INODE
436 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
437 return 0;
438 return 1;
439 }
440
441 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
442 {
443 struct inode *new = NULL;
444 int status = 0;
445 int i;
446
447 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
448 if (IS_ERR(new)) {
449 status = PTR_ERR(new);
450 mlog_errno(status);
451 goto bail;
452 }
453 osb->root_inode = new;
454
455 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
456 if (IS_ERR(new)) {
457 status = PTR_ERR(new);
458 mlog_errno(status);
459 goto bail;
460 }
461 osb->sys_root_inode = new;
462
463 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
464 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
465 if (!ocfs2_need_system_inode(osb, i))
466 continue;
467 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
468 if (!new) {
469 ocfs2_release_system_inodes(osb);
470 status = -EINVAL;
471 mlog_errno(status);
472 /* FIXME: Should ERROR_RO_FS */
473 mlog(ML_ERROR, "Unable to load system inode %d, "
474 "possibly corrupt fs?", i);
475 goto bail;
476 }
477 // the array now has one ref, so drop this one
478 iput(new);
479 }
480
481 bail:
482 if (status)
483 mlog_errno(status);
484 return status;
485 }
486
487 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
488 {
489 struct inode *new = NULL;
490 int status = 0;
491 int i;
492
493 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
494 i < NUM_SYSTEM_INODES;
495 i++) {
496 if (!ocfs2_need_system_inode(osb, i))
497 continue;
498 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
499 if (!new) {
500 ocfs2_release_system_inodes(osb);
501 status = -EINVAL;
502 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
503 status, i, osb->slot_num);
504 goto bail;
505 }
506 /* the array now has one ref, so drop this one */
507 iput(new);
508 }
509
510 bail:
511 if (status)
512 mlog_errno(status);
513 return status;
514 }
515
516 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
517 {
518 int i;
519 struct inode *inode;
520
521 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
522 inode = osb->global_system_inodes[i];
523 if (inode) {
524 iput(inode);
525 osb->global_system_inodes[i] = NULL;
526 }
527 }
528
529 inode = osb->sys_root_inode;
530 if (inode) {
531 iput(inode);
532 osb->sys_root_inode = NULL;
533 }
534
535 inode = osb->root_inode;
536 if (inode) {
537 iput(inode);
538 osb->root_inode = NULL;
539 }
540
541 if (!osb->local_system_inodes)
542 return;
543
544 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
545 if (osb->local_system_inodes[i]) {
546 iput(osb->local_system_inodes[i]);
547 osb->local_system_inodes[i] = NULL;
548 }
549 }
550
551 kfree(osb->local_system_inodes);
552 osb->local_system_inodes = NULL;
553 }
554
555 /* We're allocating fs objects, use GFP_NOFS */
556 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
557 {
558 struct ocfs2_inode_info *oi;
559
560 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
561 if (!oi)
562 return NULL;
563
564 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
565 return &oi->vfs_inode;
566 }
567
568 static void ocfs2_i_callback(struct rcu_head *head)
569 {
570 struct inode *inode = container_of(head, struct inode, i_rcu);
571 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
572 }
573
574 static void ocfs2_destroy_inode(struct inode *inode)
575 {
576 call_rcu(&inode->i_rcu, ocfs2_i_callback);
577 }
578
579 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
580 unsigned int cbits)
581 {
582 unsigned int bytes = 1 << cbits;
583 unsigned int trim = bytes;
584 unsigned int bitshift = 32;
585
586 /*
587 * i_size and all block offsets in ocfs2 are always 64 bits
588 * wide. i_clusters is 32 bits, in cluster-sized units. So on
589 * 64 bit platforms, cluster size will be the limiting factor.
590 */
591
592 #if BITS_PER_LONG == 32
593 # if defined(CONFIG_LBDAF)
594 BUILD_BUG_ON(sizeof(sector_t) != 8);
595 /*
596 * We might be limited by page cache size.
597 */
598 if (bytes > PAGE_CACHE_SIZE) {
599 bytes = PAGE_CACHE_SIZE;
600 trim = 1;
601 /*
602 * Shift by 31 here so that we don't get larger than
603 * MAX_LFS_FILESIZE
604 */
605 bitshift = 31;
606 }
607 # else
608 /*
609 * We are limited by the size of sector_t. Use block size, as
610 * that's what we expose to the VFS.
611 */
612 bytes = 1 << bbits;
613 trim = 1;
614 bitshift = 31;
615 # endif
616 #endif
617
618 /*
619 * Trim by a whole cluster when we can actually approach the
620 * on-disk limits. Otherwise we can overflow i_clusters when
621 * an extent start is at the max offset.
622 */
623 return (((unsigned long long)bytes) << bitshift) - trim;
624 }
625
626 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
627 {
628 int incompat_features;
629 int ret = 0;
630 struct mount_options parsed_options;
631 struct ocfs2_super *osb = OCFS2_SB(sb);
632 u32 tmp;
633
634 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
635 !ocfs2_check_set_options(sb, &parsed_options)) {
636 ret = -EINVAL;
637 goto out;
638 }
639
640 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
641 OCFS2_MOUNT_HB_NONE;
642 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
643 ret = -EINVAL;
644 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
645 goto out;
646 }
647
648 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
649 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
650 ret = -EINVAL;
651 mlog(ML_ERROR, "Cannot change data mode on remount\n");
652 goto out;
653 }
654
655 /* Probably don't want this on remount; it might
656 * mess with other nodes */
657 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
658 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
659 ret = -EINVAL;
660 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
661 goto out;
662 }
663
664 /* We're going to/from readonly mode. */
665 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
666 /* Disable quota accounting before remounting RO */
667 if (*flags & MS_RDONLY) {
668 ret = ocfs2_susp_quotas(osb, 0);
669 if (ret < 0)
670 goto out;
671 }
672 /* Lock here so the check of HARD_RO and the potential
673 * setting of SOFT_RO is atomic. */
674 spin_lock(&osb->osb_lock);
675 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
676 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
677 ret = -EROFS;
678 goto unlock_osb;
679 }
680
681 if (*flags & MS_RDONLY) {
682 sb->s_flags |= MS_RDONLY;
683 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
684 } else {
685 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
686 mlog(ML_ERROR, "Cannot remount RDWR "
687 "filesystem due to previous errors.\n");
688 ret = -EROFS;
689 goto unlock_osb;
690 }
691 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
692 if (incompat_features) {
693 mlog(ML_ERROR, "Cannot remount RDWR because "
694 "of unsupported optional features "
695 "(%x).\n", incompat_features);
696 ret = -EINVAL;
697 goto unlock_osb;
698 }
699 sb->s_flags &= ~MS_RDONLY;
700 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
701 }
702 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
703 unlock_osb:
704 spin_unlock(&osb->osb_lock);
705 /* Enable quota accounting after remounting RW */
706 if (!ret && !(*flags & MS_RDONLY)) {
707 if (sb_any_quota_suspended(sb))
708 ret = ocfs2_susp_quotas(osb, 1);
709 else
710 ret = ocfs2_enable_quotas(osb);
711 if (ret < 0) {
712 /* Return back changes... */
713 spin_lock(&osb->osb_lock);
714 sb->s_flags |= MS_RDONLY;
715 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
716 spin_unlock(&osb->osb_lock);
717 goto out;
718 }
719 }
720 }
721
722 if (!ret) {
723 /* Only save off the new mount options in case of a successful
724 * remount. */
725 osb->s_mount_opt = parsed_options.mount_opt;
726 osb->s_atime_quantum = parsed_options.atime_quantum;
727 osb->preferred_slot = parsed_options.slot;
728 if (parsed_options.commit_interval)
729 osb->osb_commit_interval = parsed_options.commit_interval;
730
731 if (!ocfs2_is_hard_readonly(osb))
732 ocfs2_set_journal_params(osb);
733
734 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
735 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
736 MS_POSIXACL : 0);
737 }
738 out:
739 return ret;
740 }
741
742 static int ocfs2_sb_probe(struct super_block *sb,
743 struct buffer_head **bh,
744 int *sector_size,
745 struct ocfs2_blockcheck_stats *stats)
746 {
747 int status, tmpstat;
748 struct ocfs1_vol_disk_hdr *hdr;
749 struct ocfs2_dinode *di;
750 int blksize;
751
752 *bh = NULL;
753
754 /* may be > 512 */
755 *sector_size = bdev_logical_block_size(sb->s_bdev);
756 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
757 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
758 *sector_size, OCFS2_MAX_BLOCKSIZE);
759 status = -EINVAL;
760 goto bail;
761 }
762
763 /* Can this really happen? */
764 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
765 *sector_size = OCFS2_MIN_BLOCKSIZE;
766
767 /* check block zero for old format */
768 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
769 if (status < 0) {
770 mlog_errno(status);
771 goto bail;
772 }
773 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
774 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
775 mlog(ML_ERROR, "incompatible version: %u.%u\n",
776 hdr->major_version, hdr->minor_version);
777 status = -EINVAL;
778 }
779 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
780 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
781 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
782 hdr->signature);
783 status = -EINVAL;
784 }
785 brelse(*bh);
786 *bh = NULL;
787 if (status < 0) {
788 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
789 "upgraded before mounting with ocfs v2\n");
790 goto bail;
791 }
792
793 /*
794 * Now check at magic offset for 512, 1024, 2048, 4096
795 * blocksizes. 4096 is the maximum blocksize because it is
796 * the minimum clustersize.
797 */
798 status = -EINVAL;
799 for (blksize = *sector_size;
800 blksize <= OCFS2_MAX_BLOCKSIZE;
801 blksize <<= 1) {
802 tmpstat = ocfs2_get_sector(sb, bh,
803 OCFS2_SUPER_BLOCK_BLKNO,
804 blksize);
805 if (tmpstat < 0) {
806 status = tmpstat;
807 mlog_errno(status);
808 break;
809 }
810 di = (struct ocfs2_dinode *) (*bh)->b_data;
811 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
812 spin_lock_init(&stats->b_lock);
813 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
814 if (tmpstat < 0) {
815 brelse(*bh);
816 *bh = NULL;
817 }
818 if (tmpstat != -EAGAIN) {
819 status = tmpstat;
820 break;
821 }
822 }
823
824 bail:
825 return status;
826 }
827
828 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
829 {
830 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
831
832 if (osb->s_mount_opt & hb_enabled) {
833 if (ocfs2_mount_local(osb)) {
834 mlog(ML_ERROR, "Cannot heartbeat on a locally "
835 "mounted device.\n");
836 return -EINVAL;
837 }
838 if (ocfs2_userspace_stack(osb)) {
839 mlog(ML_ERROR, "Userspace stack expected, but "
840 "o2cb heartbeat arguments passed to mount\n");
841 return -EINVAL;
842 }
843 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
844 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
845 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
846 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
847 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
848 return -EINVAL;
849 }
850 }
851
852 if (!(osb->s_mount_opt & hb_enabled)) {
853 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
854 !ocfs2_userspace_stack(osb)) {
855 mlog(ML_ERROR, "Heartbeat has to be started to mount "
856 "a read-write clustered device.\n");
857 return -EINVAL;
858 }
859 }
860
861 return 0;
862 }
863
864 /*
865 * If we're using a userspace stack, mount should have passed
866 * a name that matches the disk. If not, mount should not
867 * have passed a stack.
868 */
869 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
870 struct mount_options *mopt)
871 {
872 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
873 mlog(ML_ERROR,
874 "cluster stack passed to mount, but this filesystem "
875 "does not support it\n");
876 return -EINVAL;
877 }
878
879 if (ocfs2_userspace_stack(osb) &&
880 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
881 OCFS2_STACK_LABEL_LEN)) {
882 mlog(ML_ERROR,
883 "cluster stack passed to mount (\"%s\") does not "
884 "match the filesystem (\"%s\")\n",
885 mopt->cluster_stack,
886 osb->osb_cluster_stack);
887 return -EINVAL;
888 }
889
890 return 0;
891 }
892
893 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
894 {
895 int type;
896 struct super_block *sb = osb->sb;
897 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
898 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
899 int status = 0;
900
901 for (type = 0; type < MAXQUOTAS; type++) {
902 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
903 continue;
904 if (unsuspend)
905 status = dquot_resume(sb, type);
906 else {
907 struct ocfs2_mem_dqinfo *oinfo;
908
909 /* Cancel periodic syncing before suspending */
910 oinfo = sb_dqinfo(sb, type)->dqi_priv;
911 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
912 status = dquot_suspend(sb, type);
913 }
914 if (status < 0)
915 break;
916 }
917 if (status < 0)
918 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
919 "remount (error = %d).\n", status);
920 return status;
921 }
922
923 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
924 {
925 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
926 struct super_block *sb = osb->sb;
927 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
928 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
929 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
930 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
931 int status;
932 int type;
933
934 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
935 for (type = 0; type < MAXQUOTAS; type++) {
936 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
937 continue;
938 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
939 osb->slot_num);
940 if (!inode[type]) {
941 status = -ENOENT;
942 goto out_quota_off;
943 }
944 status = dquot_enable(inode[type], type, QFMT_OCFS2,
945 DQUOT_USAGE_ENABLED);
946 if (status < 0)
947 goto out_quota_off;
948 }
949
950 for (type = 0; type < MAXQUOTAS; type++)
951 iput(inode[type]);
952 return 0;
953 out_quota_off:
954 ocfs2_disable_quotas(osb);
955 for (type = 0; type < MAXQUOTAS; type++)
956 iput(inode[type]);
957 mlog_errno(status);
958 return status;
959 }
960
961 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
962 {
963 int type;
964 struct inode *inode;
965 struct super_block *sb = osb->sb;
966 struct ocfs2_mem_dqinfo *oinfo;
967
968 /* We mostly ignore errors in this function because there's not much
969 * we can do when we see them */
970 for (type = 0; type < MAXQUOTAS; type++) {
971 if (!sb_has_quota_loaded(sb, type))
972 continue;
973 /* Cancel periodic syncing before we grab dqonoff_mutex */
974 oinfo = sb_dqinfo(sb, type)->dqi_priv;
975 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
976 inode = igrab(sb->s_dquot.files[type]);
977 /* Turn off quotas. This will remove all dquot structures from
978 * memory and so they will be automatically synced to global
979 * quota files */
980 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
981 DQUOT_LIMITS_ENABLED);
982 if (!inode)
983 continue;
984 iput(inode);
985 }
986 }
987
988 /* Handle quota on quotactl */
989 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
990 {
991 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
992 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
993
994 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
995 return -EINVAL;
996
997 return dquot_enable(sb_dqopt(sb)->files[type], type,
998 format_id, DQUOT_LIMITS_ENABLED);
999 }
1000
1001 /* Handle quota off quotactl */
1002 static int ocfs2_quota_off(struct super_block *sb, int type)
1003 {
1004 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1005 }
1006
1007 static const struct quotactl_ops ocfs2_quotactl_ops = {
1008 .quota_on_meta = ocfs2_quota_on,
1009 .quota_off = ocfs2_quota_off,
1010 .quota_sync = dquot_quota_sync,
1011 .get_info = dquot_get_dqinfo,
1012 .set_info = dquot_set_dqinfo,
1013 .get_dqblk = dquot_get_dqblk,
1014 .set_dqblk = dquot_set_dqblk,
1015 };
1016
1017 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1018 {
1019 struct dentry *root;
1020 int status, sector_size;
1021 struct mount_options parsed_options;
1022 struct inode *inode = NULL;
1023 struct ocfs2_super *osb = NULL;
1024 struct buffer_head *bh = NULL;
1025 char nodestr[12];
1026 struct ocfs2_blockcheck_stats stats;
1027
1028 trace_ocfs2_fill_super(sb, data, silent);
1029
1030 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1031 status = -EINVAL;
1032 goto read_super_error;
1033 }
1034
1035 /* probe for superblock */
1036 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1037 if (status < 0) {
1038 mlog(ML_ERROR, "superblock probe failed!\n");
1039 goto read_super_error;
1040 }
1041
1042 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1043 osb = OCFS2_SB(sb);
1044 if (status < 0) {
1045 mlog_errno(status);
1046 goto read_super_error;
1047 }
1048 brelse(bh);
1049 bh = NULL;
1050
1051 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1052 status = -EINVAL;
1053 goto read_super_error;
1054 }
1055 osb->s_mount_opt = parsed_options.mount_opt;
1056 osb->s_atime_quantum = parsed_options.atime_quantum;
1057 osb->preferred_slot = parsed_options.slot;
1058 osb->osb_commit_interval = parsed_options.commit_interval;
1059
1060 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1061 osb->osb_resv_level = parsed_options.resv_level;
1062 osb->osb_dir_resv_level = parsed_options.resv_level;
1063 if (parsed_options.dir_resv_level == -1)
1064 osb->osb_dir_resv_level = parsed_options.resv_level;
1065 else
1066 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1067
1068 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1069 if (status)
1070 goto read_super_error;
1071
1072 sb->s_magic = OCFS2_SUPER_MAGIC;
1073
1074 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1075 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1076
1077 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1078 * heartbeat=none */
1079 if (bdev_read_only(sb->s_bdev)) {
1080 if (!(sb->s_flags & MS_RDONLY)) {
1081 status = -EACCES;
1082 mlog(ML_ERROR, "Readonly device detected but readonly "
1083 "mount was not specified.\n");
1084 goto read_super_error;
1085 }
1086
1087 /* You should not be able to start a local heartbeat
1088 * on a readonly device. */
1089 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1090 status = -EROFS;
1091 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1092 "device.\n");
1093 goto read_super_error;
1094 }
1095
1096 status = ocfs2_check_journals_nolocks(osb);
1097 if (status < 0) {
1098 if (status == -EROFS)
1099 mlog(ML_ERROR, "Recovery required on readonly "
1100 "file system, but write access is "
1101 "unavailable.\n");
1102 else
1103 mlog_errno(status);
1104 goto read_super_error;
1105 }
1106
1107 ocfs2_set_ro_flag(osb, 1);
1108
1109 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1110 "Cluster services will not be used for this mount. "
1111 "Recovery will be skipped.\n", osb->dev_str);
1112 }
1113
1114 if (!ocfs2_is_hard_readonly(osb)) {
1115 if (sb->s_flags & MS_RDONLY)
1116 ocfs2_set_ro_flag(osb, 0);
1117 }
1118
1119 status = ocfs2_verify_heartbeat(osb);
1120 if (status < 0) {
1121 mlog_errno(status);
1122 goto read_super_error;
1123 }
1124
1125 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1126 ocfs2_debugfs_root);
1127 if (!osb->osb_debug_root) {
1128 status = -EINVAL;
1129 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1130 goto read_super_error;
1131 }
1132
1133 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1134 osb->osb_debug_root,
1135 osb,
1136 &ocfs2_osb_debug_fops);
1137 if (!osb->osb_ctxt) {
1138 status = -EINVAL;
1139 mlog_errno(status);
1140 goto read_super_error;
1141 }
1142
1143 if (ocfs2_meta_ecc(osb)) {
1144 status = ocfs2_blockcheck_stats_debugfs_install(
1145 &osb->osb_ecc_stats,
1146 osb->osb_debug_root);
1147 if (status) {
1148 mlog(ML_ERROR,
1149 "Unable to create blockcheck statistics "
1150 "files\n");
1151 goto read_super_error;
1152 }
1153 }
1154
1155 status = ocfs2_mount_volume(sb);
1156 if (status < 0)
1157 goto read_super_error;
1158
1159 if (osb->root_inode)
1160 inode = igrab(osb->root_inode);
1161
1162 if (!inode) {
1163 status = -EIO;
1164 mlog_errno(status);
1165 goto read_super_error;
1166 }
1167
1168 root = d_make_root(inode);
1169 if (!root) {
1170 status = -ENOMEM;
1171 mlog_errno(status);
1172 goto read_super_error;
1173 }
1174
1175 sb->s_root = root;
1176
1177 ocfs2_complete_mount_recovery(osb);
1178
1179 if (ocfs2_mount_local(osb))
1180 snprintf(nodestr, sizeof(nodestr), "local");
1181 else
1182 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1183
1184 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1185 "with %s data mode.\n",
1186 osb->dev_str, nodestr, osb->slot_num,
1187 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1188 "ordered");
1189
1190 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1191 wake_up(&osb->osb_mount_event);
1192
1193 /* Now we can initialize quotas because we can afford to wait
1194 * for cluster locks recovery now. That also means that truncation
1195 * log recovery can happen but that waits for proper quota setup */
1196 if (!(sb->s_flags & MS_RDONLY)) {
1197 status = ocfs2_enable_quotas(osb);
1198 if (status < 0) {
1199 /* We have to err-out specially here because
1200 * s_root is already set */
1201 mlog_errno(status);
1202 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1203 wake_up(&osb->osb_mount_event);
1204 return status;
1205 }
1206 }
1207
1208 ocfs2_complete_quota_recovery(osb);
1209
1210 /* Now we wake up again for processes waiting for quotas */
1211 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1212 wake_up(&osb->osb_mount_event);
1213
1214 /* Start this when the mount is almost sure of being successful */
1215 ocfs2_orphan_scan_start(osb);
1216
1217 return status;
1218
1219 read_super_error:
1220 brelse(bh);
1221
1222 if (osb) {
1223 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1224 wake_up(&osb->osb_mount_event);
1225 ocfs2_dismount_volume(sb, 1);
1226 }
1227
1228 if (status)
1229 mlog_errno(status);
1230 return status;
1231 }
1232
1233 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1234 int flags,
1235 const char *dev_name,
1236 void *data)
1237 {
1238 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1239 }
1240
1241 static void ocfs2_kill_sb(struct super_block *sb)
1242 {
1243 struct ocfs2_super *osb = OCFS2_SB(sb);
1244
1245 /* Failed mount? */
1246 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1247 goto out;
1248
1249 /* Prevent further queueing of inode drop events */
1250 spin_lock(&dentry_list_lock);
1251 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1252 spin_unlock(&dentry_list_lock);
1253 /* Wait for work to finish and/or remove it */
1254 cancel_work_sync(&osb->dentry_lock_work);
1255 out:
1256 kill_block_super(sb);
1257 }
1258
1259 static struct file_system_type ocfs2_fs_type = {
1260 .owner = THIS_MODULE,
1261 .name = "ocfs2",
1262 .mount = ocfs2_mount,
1263 .kill_sb = ocfs2_kill_sb,
1264
1265 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1266 .next = NULL
1267 };
1268 MODULE_ALIAS_FS("ocfs2");
1269
1270 static int ocfs2_check_set_options(struct super_block *sb,
1271 struct mount_options *options)
1272 {
1273 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1274 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1275 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1276 mlog(ML_ERROR, "User quotas were requested, but this "
1277 "filesystem does not have the feature enabled.\n");
1278 return 0;
1279 }
1280 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1281 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1282 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1283 mlog(ML_ERROR, "Group quotas were requested, but this "
1284 "filesystem does not have the feature enabled.\n");
1285 return 0;
1286 }
1287 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1288 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1289 mlog(ML_ERROR, "ACL support requested but extended attributes "
1290 "feature is not enabled\n");
1291 return 0;
1292 }
1293 /* No ACL setting specified? Use XATTR feature... */
1294 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1295 OCFS2_MOUNT_NO_POSIX_ACL))) {
1296 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1297 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1298 else
1299 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1300 }
1301 return 1;
1302 }
1303
1304 static int ocfs2_parse_options(struct super_block *sb,
1305 char *options,
1306 struct mount_options *mopt,
1307 int is_remount)
1308 {
1309 int status, user_stack = 0;
1310 char *p;
1311 u32 tmp;
1312
1313 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1314
1315 mopt->commit_interval = 0;
1316 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1317 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1318 mopt->slot = OCFS2_INVALID_SLOT;
1319 mopt->localalloc_opt = -1;
1320 mopt->cluster_stack[0] = '\0';
1321 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1322 mopt->dir_resv_level = -1;
1323
1324 if (!options) {
1325 status = 1;
1326 goto bail;
1327 }
1328
1329 while ((p = strsep(&options, ",")) != NULL) {
1330 int token, option;
1331 substring_t args[MAX_OPT_ARGS];
1332
1333 if (!*p)
1334 continue;
1335
1336 token = match_token(p, tokens, args);
1337 switch (token) {
1338 case Opt_hb_local:
1339 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1340 break;
1341 case Opt_hb_none:
1342 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1343 break;
1344 case Opt_hb_global:
1345 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1346 break;
1347 case Opt_barrier:
1348 if (match_int(&args[0], &option)) {
1349 status = 0;
1350 goto bail;
1351 }
1352 if (option)
1353 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1354 else
1355 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1356 break;
1357 case Opt_intr:
1358 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1359 break;
1360 case Opt_nointr:
1361 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1362 break;
1363 case Opt_err_panic:
1364 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1365 break;
1366 case Opt_err_ro:
1367 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1368 break;
1369 case Opt_data_ordered:
1370 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1371 break;
1372 case Opt_data_writeback:
1373 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1374 break;
1375 case Opt_user_xattr:
1376 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1377 break;
1378 case Opt_nouser_xattr:
1379 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1380 break;
1381 case Opt_atime_quantum:
1382 if (match_int(&args[0], &option)) {
1383 status = 0;
1384 goto bail;
1385 }
1386 if (option >= 0)
1387 mopt->atime_quantum = option;
1388 break;
1389 case Opt_slot:
1390 option = 0;
1391 if (match_int(&args[0], &option)) {
1392 status = 0;
1393 goto bail;
1394 }
1395 if (option)
1396 mopt->slot = (s16)option;
1397 break;
1398 case Opt_commit:
1399 option = 0;
1400 if (match_int(&args[0], &option)) {
1401 status = 0;
1402 goto bail;
1403 }
1404 if (option < 0)
1405 return 0;
1406 if (option == 0)
1407 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1408 mopt->commit_interval = HZ * option;
1409 break;
1410 case Opt_localalloc:
1411 option = 0;
1412 if (match_int(&args[0], &option)) {
1413 status = 0;
1414 goto bail;
1415 }
1416 if (option >= 0)
1417 mopt->localalloc_opt = option;
1418 break;
1419 case Opt_localflocks:
1420 /*
1421 * Changing this during remount could race
1422 * flock() requests, or "unbalance" existing
1423 * ones (e.g., a lock is taken in one mode but
1424 * dropped in the other). If users care enough
1425 * to flip locking modes during remount, we
1426 * could add a "local" flag to individual
1427 * flock structures for proper tracking of
1428 * state.
1429 */
1430 if (!is_remount)
1431 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1432 break;
1433 case Opt_stack:
1434 /* Check both that the option we were passed
1435 * is of the right length and that it is a proper
1436 * string of the right length.
1437 */
1438 if (((args[0].to - args[0].from) !=
1439 OCFS2_STACK_LABEL_LEN) ||
1440 (strnlen(args[0].from,
1441 OCFS2_STACK_LABEL_LEN) !=
1442 OCFS2_STACK_LABEL_LEN)) {
1443 mlog(ML_ERROR,
1444 "Invalid cluster_stack option\n");
1445 status = 0;
1446 goto bail;
1447 }
1448 memcpy(mopt->cluster_stack, args[0].from,
1449 OCFS2_STACK_LABEL_LEN);
1450 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1451 /*
1452 * Open code the memcmp here as we don't have
1453 * an osb to pass to
1454 * ocfs2_userspace_stack().
1455 */
1456 if (memcmp(mopt->cluster_stack,
1457 OCFS2_CLASSIC_CLUSTER_STACK,
1458 OCFS2_STACK_LABEL_LEN))
1459 user_stack = 1;
1460 break;
1461 case Opt_inode64:
1462 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1463 break;
1464 case Opt_usrquota:
1465 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1466 break;
1467 case Opt_grpquota:
1468 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1469 break;
1470 case Opt_coherency_buffered:
1471 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1472 break;
1473 case Opt_coherency_full:
1474 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1475 break;
1476 case Opt_acl:
1477 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1478 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1479 break;
1480 case Opt_noacl:
1481 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1482 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1483 break;
1484 case Opt_resv_level:
1485 if (is_remount)
1486 break;
1487 if (match_int(&args[0], &option)) {
1488 status = 0;
1489 goto bail;
1490 }
1491 if (option >= OCFS2_MIN_RESV_LEVEL &&
1492 option < OCFS2_MAX_RESV_LEVEL)
1493 mopt->resv_level = option;
1494 break;
1495 case Opt_dir_resv_level:
1496 if (is_remount)
1497 break;
1498 if (match_int(&args[0], &option)) {
1499 status = 0;
1500 goto bail;
1501 }
1502 if (option >= OCFS2_MIN_RESV_LEVEL &&
1503 option < OCFS2_MAX_RESV_LEVEL)
1504 mopt->dir_resv_level = option;
1505 break;
1506 default:
1507 mlog(ML_ERROR,
1508 "Unrecognized mount option \"%s\" "
1509 "or missing value\n", p);
1510 status = 0;
1511 goto bail;
1512 }
1513 }
1514
1515 if (user_stack == 0) {
1516 /* Ensure only one heartbeat mode */
1517 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1518 OCFS2_MOUNT_HB_GLOBAL |
1519 OCFS2_MOUNT_HB_NONE);
1520 if (hweight32(tmp) != 1) {
1521 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1522 status = 0;
1523 goto bail;
1524 }
1525 }
1526
1527 status = 1;
1528
1529 bail:
1530 return status;
1531 }
1532
1533 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1534 {
1535 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1536 unsigned long opts = osb->s_mount_opt;
1537 unsigned int local_alloc_megs;
1538
1539 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1540 seq_printf(s, ",_netdev");
1541 if (opts & OCFS2_MOUNT_HB_LOCAL)
1542 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1543 else
1544 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1545 } else
1546 seq_printf(s, ",%s", OCFS2_HB_NONE);
1547
1548 if (opts & OCFS2_MOUNT_NOINTR)
1549 seq_printf(s, ",nointr");
1550
1551 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1552 seq_printf(s, ",data=writeback");
1553 else
1554 seq_printf(s, ",data=ordered");
1555
1556 if (opts & OCFS2_MOUNT_BARRIER)
1557 seq_printf(s, ",barrier=1");
1558
1559 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1560 seq_printf(s, ",errors=panic");
1561 else
1562 seq_printf(s, ",errors=remount-ro");
1563
1564 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1565 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1566
1567 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1568
1569 if (osb->osb_commit_interval)
1570 seq_printf(s, ",commit=%u",
1571 (unsigned) (osb->osb_commit_interval / HZ));
1572
1573 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1574 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1575 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1576
1577 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1578 seq_printf(s, ",localflocks,");
1579
1580 if (osb->osb_cluster_stack[0])
1581 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1582 osb->osb_cluster_stack);
1583 if (opts & OCFS2_MOUNT_USRQUOTA)
1584 seq_printf(s, ",usrquota");
1585 if (opts & OCFS2_MOUNT_GRPQUOTA)
1586 seq_printf(s, ",grpquota");
1587
1588 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1589 seq_printf(s, ",coherency=buffered");
1590 else
1591 seq_printf(s, ",coherency=full");
1592
1593 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1594 seq_printf(s, ",nouser_xattr");
1595 else
1596 seq_printf(s, ",user_xattr");
1597
1598 if (opts & OCFS2_MOUNT_INODE64)
1599 seq_printf(s, ",inode64");
1600
1601 if (opts & OCFS2_MOUNT_POSIX_ACL)
1602 seq_printf(s, ",acl");
1603 else
1604 seq_printf(s, ",noacl");
1605
1606 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1607 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1608
1609 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1610 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1611
1612 return 0;
1613 }
1614
1615 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ];
1616
1617 static int __init ocfs2_init(void)
1618 {
1619 int status, i;
1620
1621 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++)
1622 init_waitqueue_head(&ocfs2__ioend_wq[i]);
1623
1624 status = init_ocfs2_uptodate_cache();
1625 if (status < 0)
1626 goto out1;
1627
1628 status = ocfs2_initialize_mem_caches();
1629 if (status < 0)
1630 goto out2;
1631
1632 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1633 if (!ocfs2_wq) {
1634 status = -ENOMEM;
1635 goto out3;
1636 }
1637
1638 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1639 if (!ocfs2_debugfs_root) {
1640 status = -EFAULT;
1641 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1642 }
1643
1644 ocfs2_set_locking_protocol();
1645
1646 status = register_quota_format(&ocfs2_quota_format);
1647 if (status < 0)
1648 goto out4;
1649 status = register_filesystem(&ocfs2_fs_type);
1650 if (!status)
1651 return 0;
1652
1653 unregister_quota_format(&ocfs2_quota_format);
1654 out4:
1655 destroy_workqueue(ocfs2_wq);
1656 debugfs_remove(ocfs2_debugfs_root);
1657 out3:
1658 ocfs2_free_mem_caches();
1659 out2:
1660 exit_ocfs2_uptodate_cache();
1661 out1:
1662 mlog_errno(status);
1663 return status;
1664 }
1665
1666 static void __exit ocfs2_exit(void)
1667 {
1668 if (ocfs2_wq) {
1669 flush_workqueue(ocfs2_wq);
1670 destroy_workqueue(ocfs2_wq);
1671 }
1672
1673 unregister_quota_format(&ocfs2_quota_format);
1674
1675 debugfs_remove(ocfs2_debugfs_root);
1676
1677 ocfs2_free_mem_caches();
1678
1679 unregister_filesystem(&ocfs2_fs_type);
1680
1681 exit_ocfs2_uptodate_cache();
1682 }
1683
1684 static void ocfs2_put_super(struct super_block *sb)
1685 {
1686 trace_ocfs2_put_super(sb);
1687
1688 ocfs2_sync_blockdev(sb);
1689 ocfs2_dismount_volume(sb, 0);
1690 }
1691
1692 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1693 {
1694 struct ocfs2_super *osb;
1695 u32 numbits, freebits;
1696 int status;
1697 struct ocfs2_dinode *bm_lock;
1698 struct buffer_head *bh = NULL;
1699 struct inode *inode = NULL;
1700
1701 trace_ocfs2_statfs(dentry->d_sb, buf);
1702
1703 osb = OCFS2_SB(dentry->d_sb);
1704
1705 inode = ocfs2_get_system_file_inode(osb,
1706 GLOBAL_BITMAP_SYSTEM_INODE,
1707 OCFS2_INVALID_SLOT);
1708 if (!inode) {
1709 mlog(ML_ERROR, "failed to get bitmap inode\n");
1710 status = -EIO;
1711 goto bail;
1712 }
1713
1714 status = ocfs2_inode_lock(inode, &bh, 0);
1715 if (status < 0) {
1716 mlog_errno(status);
1717 goto bail;
1718 }
1719
1720 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1721
1722 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1723 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1724
1725 buf->f_type = OCFS2_SUPER_MAGIC;
1726 buf->f_bsize = dentry->d_sb->s_blocksize;
1727 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1728 buf->f_blocks = ((sector_t) numbits) *
1729 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1730 buf->f_bfree = ((sector_t) freebits) *
1731 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1732 buf->f_bavail = buf->f_bfree;
1733 buf->f_files = numbits;
1734 buf->f_ffree = freebits;
1735 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1736 & 0xFFFFFFFFUL;
1737 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1738 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1739
1740 brelse(bh);
1741
1742 ocfs2_inode_unlock(inode, 0);
1743 status = 0;
1744 bail:
1745 if (inode)
1746 iput(inode);
1747
1748 if (status)
1749 mlog_errno(status);
1750
1751 return status;
1752 }
1753
1754 static void ocfs2_inode_init_once(void *data)
1755 {
1756 struct ocfs2_inode_info *oi = data;
1757
1758 oi->ip_flags = 0;
1759 oi->ip_open_count = 0;
1760 spin_lock_init(&oi->ip_lock);
1761 ocfs2_extent_map_init(&oi->vfs_inode);
1762 INIT_LIST_HEAD(&oi->ip_io_markers);
1763 oi->ip_dir_start_lookup = 0;
1764 atomic_set(&oi->ip_unaligned_aio, 0);
1765 init_rwsem(&oi->ip_alloc_sem);
1766 init_rwsem(&oi->ip_xattr_sem);
1767 mutex_init(&oi->ip_io_mutex);
1768
1769 oi->ip_blkno = 0ULL;
1770 oi->ip_clusters = 0;
1771
1772 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1773
1774 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1775 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1776 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1777
1778 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1779 &ocfs2_inode_caching_ops);
1780
1781 inode_init_once(&oi->vfs_inode);
1782 }
1783
1784 static int ocfs2_initialize_mem_caches(void)
1785 {
1786 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1787 sizeof(struct ocfs2_inode_info),
1788 0,
1789 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1790 SLAB_MEM_SPREAD),
1791 ocfs2_inode_init_once);
1792 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1793 sizeof(struct ocfs2_dquot),
1794 0,
1795 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1796 SLAB_MEM_SPREAD),
1797 NULL);
1798 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1799 sizeof(struct ocfs2_quota_chunk),
1800 0,
1801 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1802 NULL);
1803 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1804 !ocfs2_qf_chunk_cachep) {
1805 if (ocfs2_inode_cachep)
1806 kmem_cache_destroy(ocfs2_inode_cachep);
1807 if (ocfs2_dquot_cachep)
1808 kmem_cache_destroy(ocfs2_dquot_cachep);
1809 if (ocfs2_qf_chunk_cachep)
1810 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1811 return -ENOMEM;
1812 }
1813
1814 return 0;
1815 }
1816
1817 static void ocfs2_free_mem_caches(void)
1818 {
1819 /*
1820 * Make sure all delayed rcu free inodes are flushed before we
1821 * destroy cache.
1822 */
1823 rcu_barrier();
1824 if (ocfs2_inode_cachep)
1825 kmem_cache_destroy(ocfs2_inode_cachep);
1826 ocfs2_inode_cachep = NULL;
1827
1828 if (ocfs2_dquot_cachep)
1829 kmem_cache_destroy(ocfs2_dquot_cachep);
1830 ocfs2_dquot_cachep = NULL;
1831
1832 if (ocfs2_qf_chunk_cachep)
1833 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1834 ocfs2_qf_chunk_cachep = NULL;
1835 }
1836
1837 static int ocfs2_get_sector(struct super_block *sb,
1838 struct buffer_head **bh,
1839 int block,
1840 int sect_size)
1841 {
1842 if (!sb_set_blocksize(sb, sect_size)) {
1843 mlog(ML_ERROR, "unable to set blocksize\n");
1844 return -EIO;
1845 }
1846
1847 *bh = sb_getblk(sb, block);
1848 if (!*bh) {
1849 mlog_errno(-ENOMEM);
1850 return -ENOMEM;
1851 }
1852 lock_buffer(*bh);
1853 if (!buffer_dirty(*bh))
1854 clear_buffer_uptodate(*bh);
1855 unlock_buffer(*bh);
1856 ll_rw_block(READ, 1, bh);
1857 wait_on_buffer(*bh);
1858 if (!buffer_uptodate(*bh)) {
1859 mlog_errno(-EIO);
1860 brelse(*bh);
1861 *bh = NULL;
1862 return -EIO;
1863 }
1864
1865 return 0;
1866 }
1867
1868 static int ocfs2_mount_volume(struct super_block *sb)
1869 {
1870 int status = 0;
1871 int unlock_super = 0;
1872 struct ocfs2_super *osb = OCFS2_SB(sb);
1873
1874 if (ocfs2_is_hard_readonly(osb))
1875 goto leave;
1876
1877 status = ocfs2_dlm_init(osb);
1878 if (status < 0) {
1879 mlog_errno(status);
1880 goto leave;
1881 }
1882
1883 status = ocfs2_super_lock(osb, 1);
1884 if (status < 0) {
1885 mlog_errno(status);
1886 goto leave;
1887 }
1888 unlock_super = 1;
1889
1890 /* This will load up the node map and add ourselves to it. */
1891 status = ocfs2_find_slot(osb);
1892 if (status < 0) {
1893 mlog_errno(status);
1894 goto leave;
1895 }
1896
1897 /* load all node-local system inodes */
1898 status = ocfs2_init_local_system_inodes(osb);
1899 if (status < 0) {
1900 mlog_errno(status);
1901 goto leave;
1902 }
1903
1904 status = ocfs2_check_volume(osb);
1905 if (status < 0) {
1906 mlog_errno(status);
1907 goto leave;
1908 }
1909
1910 status = ocfs2_truncate_log_init(osb);
1911 if (status < 0)
1912 mlog_errno(status);
1913
1914 leave:
1915 if (unlock_super)
1916 ocfs2_super_unlock(osb, 1);
1917
1918 return status;
1919 }
1920
1921 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1922 {
1923 int tmp, hangup_needed = 0;
1924 struct ocfs2_super *osb = NULL;
1925 char nodestr[12];
1926
1927 trace_ocfs2_dismount_volume(sb);
1928
1929 BUG_ON(!sb);
1930 osb = OCFS2_SB(sb);
1931 BUG_ON(!osb);
1932
1933 debugfs_remove(osb->osb_ctxt);
1934
1935 /*
1936 * Flush inode dropping work queue so that deletes are
1937 * performed while the filesystem is still working
1938 */
1939 ocfs2_drop_all_dl_inodes(osb);
1940
1941 /* Orphan scan should be stopped as early as possible */
1942 ocfs2_orphan_scan_stop(osb);
1943
1944 ocfs2_disable_quotas(osb);
1945
1946 ocfs2_shutdown_local_alloc(osb);
1947
1948 /* This will disable recovery and flush any recovery work. */
1949 ocfs2_recovery_exit(osb);
1950
1951 /*
1952 * During dismount, when it recovers another node it will call
1953 * ocfs2_recover_orphans and queue delayed work osb_truncate_log_wq.
1954 */
1955 ocfs2_truncate_log_shutdown(osb);
1956
1957 ocfs2_journal_shutdown(osb);
1958
1959 ocfs2_sync_blockdev(sb);
1960
1961 ocfs2_purge_refcount_trees(osb);
1962
1963 /* No cluster connection means we've failed during mount, so skip
1964 * all the steps which depended on that to complete. */
1965 if (osb->cconn) {
1966 tmp = ocfs2_super_lock(osb, 1);
1967 if (tmp < 0) {
1968 mlog_errno(tmp);
1969 return;
1970 }
1971 }
1972
1973 if (osb->slot_num != OCFS2_INVALID_SLOT)
1974 ocfs2_put_slot(osb);
1975
1976 if (osb->cconn)
1977 ocfs2_super_unlock(osb, 1);
1978
1979 ocfs2_release_system_inodes(osb);
1980
1981 /*
1982 * If we're dismounting due to mount error, mount.ocfs2 will clean
1983 * up heartbeat. If we're a local mount, there is no heartbeat.
1984 * If we failed before we got a uuid_str yet, we can't stop
1985 * heartbeat. Otherwise, do it.
1986 */
1987 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1988 !ocfs2_is_hard_readonly(osb))
1989 hangup_needed = 1;
1990
1991 if (osb->cconn)
1992 ocfs2_dlm_shutdown(osb, hangup_needed);
1993
1994 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1995 debugfs_remove(osb->osb_debug_root);
1996
1997 if (hangup_needed)
1998 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1999
2000 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
2001
2002 if (ocfs2_mount_local(osb))
2003 snprintf(nodestr, sizeof(nodestr), "local");
2004 else
2005 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2006
2007 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2008 osb->dev_str, nodestr);
2009
2010 ocfs2_delete_osb(osb);
2011 kfree(osb);
2012 sb->s_dev = 0;
2013 sb->s_fs_info = NULL;
2014 }
2015
2016 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2017 unsigned uuid_bytes)
2018 {
2019 int i, ret;
2020 char *ptr;
2021
2022 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2023
2024 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2025 if (osb->uuid_str == NULL)
2026 return -ENOMEM;
2027
2028 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2029 /* print with null */
2030 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2031 if (ret != 2) /* drop super cleans up */
2032 return -EINVAL;
2033 /* then only advance past the last char */
2034 ptr += 2;
2035 }
2036
2037 return 0;
2038 }
2039
2040 /* Make sure entire volume is addressable by our journal. Requires
2041 osb_clusters_at_boot to be valid and for the journal to have been
2042 initialized by ocfs2_journal_init(). */
2043 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2044 {
2045 int status = 0;
2046 u64 max_block =
2047 ocfs2_clusters_to_blocks(osb->sb,
2048 osb->osb_clusters_at_boot) - 1;
2049
2050 /* 32-bit block number is always OK. */
2051 if (max_block <= (u32)~0ULL)
2052 goto out;
2053
2054 /* Volume is "huge", so see if our journal is new enough to
2055 support it. */
2056 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2057 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2058 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2059 JBD2_FEATURE_INCOMPAT_64BIT))) {
2060 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2061 "Enable the 'block64' journal option with tunefs.ocfs2");
2062 status = -EFBIG;
2063 goto out;
2064 }
2065
2066 out:
2067 return status;
2068 }
2069
2070 static int ocfs2_initialize_super(struct super_block *sb,
2071 struct buffer_head *bh,
2072 int sector_size,
2073 struct ocfs2_blockcheck_stats *stats)
2074 {
2075 int status;
2076 int i, cbits, bbits;
2077 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2078 struct inode *inode = NULL;
2079 struct ocfs2_journal *journal;
2080 __le32 uuid_net_key;
2081 struct ocfs2_super *osb;
2082 u64 total_blocks;
2083
2084 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2085 if (!osb) {
2086 status = -ENOMEM;
2087 mlog_errno(status);
2088 goto bail;
2089 }
2090
2091 sb->s_fs_info = osb;
2092 sb->s_op = &ocfs2_sops;
2093 sb->s_d_op = &ocfs2_dentry_ops;
2094 sb->s_export_op = &ocfs2_export_ops;
2095 sb->s_qcop = &ocfs2_quotactl_ops;
2096 sb->dq_op = &ocfs2_quota_operations;
2097 sb->s_xattr = ocfs2_xattr_handlers;
2098 sb->s_time_gran = 1;
2099 sb->s_flags |= MS_NOATIME;
2100 /* this is needed to support O_LARGEFILE */
2101 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2102 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2103 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2104
2105 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2106
2107 for (i = 0; i < 3; i++)
2108 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2109 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2110
2111 osb->sb = sb;
2112 /* Save off for ocfs2_rw_direct */
2113 osb->s_sectsize_bits = blksize_bits(sector_size);
2114 BUG_ON(!osb->s_sectsize_bits);
2115
2116 spin_lock_init(&osb->dc_task_lock);
2117 init_waitqueue_head(&osb->dc_event);
2118 osb->dc_work_sequence = 0;
2119 osb->dc_wake_sequence = 0;
2120 INIT_LIST_HEAD(&osb->blocked_lock_list);
2121 osb->blocked_lock_count = 0;
2122 spin_lock_init(&osb->osb_lock);
2123 spin_lock_init(&osb->osb_xattr_lock);
2124 ocfs2_init_steal_slots(osb);
2125
2126 atomic_set(&osb->alloc_stats.moves, 0);
2127 atomic_set(&osb->alloc_stats.local_data, 0);
2128 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2129 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2130 atomic_set(&osb->alloc_stats.bg_extends, 0);
2131
2132 /* Copy the blockcheck stats from the superblock probe */
2133 osb->osb_ecc_stats = *stats;
2134
2135 ocfs2_init_node_maps(osb);
2136
2137 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2138 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2139
2140 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2141 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2142 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2143 osb->max_slots);
2144 status = -EINVAL;
2145 goto bail;
2146 }
2147
2148 ocfs2_orphan_scan_init(osb);
2149
2150 status = ocfs2_recovery_init(osb);
2151 if (status) {
2152 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2153 mlog_errno(status);
2154 goto bail;
2155 }
2156
2157 init_waitqueue_head(&osb->checkpoint_event);
2158
2159 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2160
2161 osb->slot_num = OCFS2_INVALID_SLOT;
2162
2163 osb->s_xattr_inline_size = le16_to_cpu(
2164 di->id2.i_super.s_xattr_inline_size);
2165
2166 osb->local_alloc_state = OCFS2_LA_UNUSED;
2167 osb->local_alloc_bh = NULL;
2168 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2169
2170 init_waitqueue_head(&osb->osb_mount_event);
2171
2172 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2173 if (status) {
2174 mlog_errno(status);
2175 goto bail;
2176 }
2177
2178 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2179 if (!osb->vol_label) {
2180 mlog(ML_ERROR, "unable to alloc vol label\n");
2181 status = -ENOMEM;
2182 goto bail;
2183 }
2184
2185 osb->slot_recovery_generations =
2186 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2187 GFP_KERNEL);
2188 if (!osb->slot_recovery_generations) {
2189 status = -ENOMEM;
2190 mlog_errno(status);
2191 goto bail;
2192 }
2193
2194 init_waitqueue_head(&osb->osb_wipe_event);
2195 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2196 sizeof(*osb->osb_orphan_wipes),
2197 GFP_KERNEL);
2198 if (!osb->osb_orphan_wipes) {
2199 status = -ENOMEM;
2200 mlog_errno(status);
2201 goto bail;
2202 }
2203
2204 osb->osb_rf_lock_tree = RB_ROOT;
2205
2206 osb->s_feature_compat =
2207 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2208 osb->s_feature_ro_compat =
2209 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2210 osb->s_feature_incompat =
2211 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2212
2213 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2214 mlog(ML_ERROR, "couldn't mount because of unsupported "
2215 "optional features (%x).\n", i);
2216 status = -EINVAL;
2217 goto bail;
2218 }
2219 if (!(osb->sb->s_flags & MS_RDONLY) &&
2220 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2221 mlog(ML_ERROR, "couldn't mount RDWR because of "
2222 "unsupported optional features (%x).\n", i);
2223 status = -EINVAL;
2224 goto bail;
2225 }
2226
2227 if (ocfs2_clusterinfo_valid(osb)) {
2228 osb->osb_stackflags =
2229 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2230 strlcpy(osb->osb_cluster_stack,
2231 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2232 OCFS2_STACK_LABEL_LEN + 1);
2233 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2234 mlog(ML_ERROR,
2235 "couldn't mount because of an invalid "
2236 "cluster stack label (%s) \n",
2237 osb->osb_cluster_stack);
2238 status = -EINVAL;
2239 goto bail;
2240 }
2241 strlcpy(osb->osb_cluster_name,
2242 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2243 OCFS2_CLUSTER_NAME_LEN + 1);
2244 } else {
2245 /* The empty string is identical with classic tools that
2246 * don't know about s_cluster_info. */
2247 osb->osb_cluster_stack[0] = '\0';
2248 }
2249
2250 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2251
2252 /* FIXME
2253 * This should be done in ocfs2_journal_init(), but unknown
2254 * ordering issues will cause the filesystem to crash.
2255 * If anyone wants to figure out what part of the code
2256 * refers to osb->journal before ocfs2_journal_init() is run,
2257 * be my guest.
2258 */
2259 /* initialize our journal structure */
2260
2261 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2262 if (!journal) {
2263 mlog(ML_ERROR, "unable to alloc journal\n");
2264 status = -ENOMEM;
2265 goto bail;
2266 }
2267 osb->journal = journal;
2268 journal->j_osb = osb;
2269
2270 atomic_set(&journal->j_num_trans, 0);
2271 init_rwsem(&journal->j_trans_barrier);
2272 init_waitqueue_head(&journal->j_checkpointed);
2273 spin_lock_init(&journal->j_lock);
2274 journal->j_trans_id = (unsigned long) 1;
2275 INIT_LIST_HEAD(&journal->j_la_cleanups);
2276 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2277 journal->j_state = OCFS2_JOURNAL_FREE;
2278
2279 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2280 osb->dentry_lock_list = NULL;
2281
2282 /* get some pseudo constants for clustersize bits */
2283 osb->s_clustersize_bits =
2284 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2285 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2286
2287 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2288 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2289 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2290 osb->s_clustersize);
2291 status = -EINVAL;
2292 goto bail;
2293 }
2294
2295 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2296 le32_to_cpu(di->i_clusters));
2297
2298 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2299 total_blocks);
2300 if (status) {
2301 mlog(ML_ERROR, "Volume too large "
2302 "to mount safely on this system");
2303 status = -EFBIG;
2304 goto bail;
2305 }
2306
2307 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2308 sizeof(di->id2.i_super.s_uuid))) {
2309 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2310 status = -ENOMEM;
2311 goto bail;
2312 }
2313
2314 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2315
2316 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2317 osb->vol_label[63] = '\0';
2318 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2319 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2320 osb->first_cluster_group_blkno =
2321 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2322 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2323 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2324 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2325 (unsigned long long)osb->root_blkno,
2326 (unsigned long long)osb->system_dir_blkno,
2327 osb->s_clustersize_bits);
2328
2329 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2330 if (!osb->osb_dlm_debug) {
2331 status = -ENOMEM;
2332 mlog_errno(status);
2333 goto bail;
2334 }
2335
2336 atomic_set(&osb->vol_state, VOLUME_INIT);
2337
2338 /* load root, system_dir, and all global system inodes */
2339 status = ocfs2_init_global_system_inodes(osb);
2340 if (status < 0) {
2341 mlog_errno(status);
2342 goto bail;
2343 }
2344
2345 /*
2346 * global bitmap
2347 */
2348 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2349 OCFS2_INVALID_SLOT);
2350 if (!inode) {
2351 status = -EINVAL;
2352 mlog_errno(status);
2353 goto bail;
2354 }
2355
2356 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2357 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2358 iput(inode);
2359
2360 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2361 osb->s_feature_incompat) * 8;
2362
2363 status = ocfs2_init_slot_info(osb);
2364 if (status < 0) {
2365 mlog_errno(status);
2366 goto bail;
2367 }
2368 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb);
2369
2370 bail:
2371 return status;
2372 }
2373
2374 /*
2375 * will return: -EAGAIN if it is ok to keep searching for superblocks
2376 * -EINVAL if there is a bad superblock
2377 * 0 on success
2378 */
2379 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2380 struct buffer_head *bh,
2381 u32 blksz,
2382 struct ocfs2_blockcheck_stats *stats)
2383 {
2384 int status = -EAGAIN;
2385
2386 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2387 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2388 /* We have to do a raw check of the feature here */
2389 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2390 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2391 status = ocfs2_block_check_validate(bh->b_data,
2392 bh->b_size,
2393 &di->i_check,
2394 stats);
2395 if (status)
2396 goto out;
2397 }
2398 status = -EINVAL;
2399 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2400 mlog(ML_ERROR, "found superblock with incorrect block "
2401 "size: found %u, should be %u\n",
2402 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2403 blksz);
2404 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2405 OCFS2_MAJOR_REV_LEVEL ||
2406 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2407 OCFS2_MINOR_REV_LEVEL) {
2408 mlog(ML_ERROR, "found superblock with bad version: "
2409 "found %u.%u, should be %u.%u\n",
2410 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2411 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2412 OCFS2_MAJOR_REV_LEVEL,
2413 OCFS2_MINOR_REV_LEVEL);
2414 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2415 mlog(ML_ERROR, "bad block number on superblock: "
2416 "found %llu, should be %llu\n",
2417 (unsigned long long)le64_to_cpu(di->i_blkno),
2418 (unsigned long long)bh->b_blocknr);
2419 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2420 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2421 mlog(ML_ERROR, "bad cluster size found: %u\n",
2422 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2423 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2424 mlog(ML_ERROR, "bad root_blkno: 0\n");
2425 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2426 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2427 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2428 mlog(ML_ERROR,
2429 "Superblock slots found greater than file system "
2430 "maximum: found %u, max %u\n",
2431 le16_to_cpu(di->id2.i_super.s_max_slots),
2432 OCFS2_MAX_SLOTS);
2433 } else {
2434 /* found it! */
2435 status = 0;
2436 }
2437 }
2438
2439 out:
2440 if (status && status != -EAGAIN)
2441 mlog_errno(status);
2442 return status;
2443 }
2444
2445 static int ocfs2_check_volume(struct ocfs2_super *osb)
2446 {
2447 int status;
2448 int dirty;
2449 int local;
2450 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2451 * recover
2452 * ourselves. */
2453
2454 /* Init our journal object. */
2455 status = ocfs2_journal_init(osb->journal, &dirty);
2456 if (status < 0) {
2457 mlog(ML_ERROR, "Could not initialize journal!\n");
2458 goto finally;
2459 }
2460
2461 /* Now that journal has been initialized, check to make sure
2462 entire volume is addressable. */
2463 status = ocfs2_journal_addressable(osb);
2464 if (status)
2465 goto finally;
2466
2467 /* If the journal was unmounted cleanly then we don't want to
2468 * recover anything. Otherwise, journal_load will do that
2469 * dirty work for us :) */
2470 if (!dirty) {
2471 status = ocfs2_journal_wipe(osb->journal, 0);
2472 if (status < 0) {
2473 mlog_errno(status);
2474 goto finally;
2475 }
2476 } else {
2477 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2478 "unmounted cleanly, recovering it.\n", osb->dev_str);
2479 }
2480
2481 local = ocfs2_mount_local(osb);
2482
2483 /* will play back anything left in the journal. */
2484 status = ocfs2_journal_load(osb->journal, local, dirty);
2485 if (status < 0) {
2486 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2487 goto finally;
2488 }
2489
2490 if (dirty) {
2491 /* recover my local alloc if we didn't unmount cleanly. */
2492 status = ocfs2_begin_local_alloc_recovery(osb,
2493 osb->slot_num,
2494 &local_alloc);
2495 if (status < 0) {
2496 mlog_errno(status);
2497 goto finally;
2498 }
2499 /* we complete the recovery process after we've marked
2500 * ourselves as mounted. */
2501 }
2502
2503 status = ocfs2_load_local_alloc(osb);
2504 if (status < 0) {
2505 mlog_errno(status);
2506 goto finally;
2507 }
2508
2509 if (dirty) {
2510 /* Recovery will be completed after we've mounted the
2511 * rest of the volume. */
2512 osb->dirty = 1;
2513 osb->local_alloc_copy = local_alloc;
2514 local_alloc = NULL;
2515 }
2516
2517 /* go through each journal, trylock it and if you get the
2518 * lock, and it's marked as dirty, set the bit in the recover
2519 * map and launch a recovery thread for it. */
2520 status = ocfs2_mark_dead_nodes(osb);
2521 if (status < 0) {
2522 mlog_errno(status);
2523 goto finally;
2524 }
2525
2526 status = ocfs2_compute_replay_slots(osb);
2527 if (status < 0)
2528 mlog_errno(status);
2529
2530 finally:
2531 kfree(local_alloc);
2532
2533 if (status)
2534 mlog_errno(status);
2535 return status;
2536 }
2537
2538 /*
2539 * The routine gets called from dismount or close whenever a dismount on
2540 * volume is requested and the osb open count becomes 1.
2541 * It will remove the osb from the global list and also free up all the
2542 * initialized resources and fileobject.
2543 */
2544 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2545 {
2546 /* This function assumes that the caller has the main osb resource */
2547
2548 ocfs2_free_slot_info(osb);
2549
2550 kfree(osb->osb_orphan_wipes);
2551 kfree(osb->slot_recovery_generations);
2552 /* FIXME
2553 * This belongs in journal shutdown, but because we have to
2554 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2555 * we free it here.
2556 */
2557 kfree(osb->journal);
2558 kfree(osb->local_alloc_copy);
2559 kfree(osb->uuid_str);
2560 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2561 memset(osb, 0, sizeof(struct ocfs2_super));
2562 }
2563
2564 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2565 * panic(). We do not support continue-on-error operation. */
2566 static void ocfs2_handle_error(struct super_block *sb)
2567 {
2568 struct ocfs2_super *osb = OCFS2_SB(sb);
2569
2570 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2571 panic("OCFS2: (device %s): panic forced after error\n",
2572 sb->s_id);
2573
2574 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2575
2576 if (sb->s_flags & MS_RDONLY &&
2577 (ocfs2_is_soft_readonly(osb) ||
2578 ocfs2_is_hard_readonly(osb)))
2579 return;
2580
2581 printk(KERN_CRIT "File system is now read-only due to the potential "
2582 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2583 "system is unmounted.\n");
2584 sb->s_flags |= MS_RDONLY;
2585 ocfs2_set_ro_flag(osb, 0);
2586 }
2587
2588 static char error_buf[1024];
2589
2590 void __ocfs2_error(struct super_block *sb,
2591 const char *function,
2592 const char *fmt, ...)
2593 {
2594 va_list args;
2595
2596 va_start(args, fmt);
2597 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2598 va_end(args);
2599
2600 /* Not using mlog here because we want to show the actual
2601 * function the error came from. */
2602 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2603 sb->s_id, function, error_buf);
2604
2605 ocfs2_handle_error(sb);
2606 }
2607
2608 /* Handle critical errors. This is intentionally more drastic than
2609 * ocfs2_handle_error, so we only use for things like journal errors,
2610 * etc. */
2611 void __ocfs2_abort(struct super_block* sb,
2612 const char *function,
2613 const char *fmt, ...)
2614 {
2615 va_list args;
2616
2617 va_start(args, fmt);
2618 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2619 va_end(args);
2620
2621 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2622 sb->s_id, function, error_buf);
2623
2624 /* We don't have the cluster support yet to go straight to
2625 * hard readonly in here. Until then, we want to keep
2626 * ocfs2_abort() so that we can at least mark critical
2627 * errors.
2628 *
2629 * TODO: This should abort the journal and alert other nodes
2630 * that our slot needs recovery. */
2631
2632 /* Force a panic(). This stinks, but it's better than letting
2633 * things continue without having a proper hard readonly
2634 * here. */
2635 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2636 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2637 ocfs2_handle_error(sb);
2638 }
2639
2640 /*
2641 * Void signal blockers, because in-kernel sigprocmask() only fails
2642 * when SIG_* is wrong.
2643 */
2644 void ocfs2_block_signals(sigset_t *oldset)
2645 {
2646 int rc;
2647 sigset_t blocked;
2648
2649 sigfillset(&blocked);
2650 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2651 BUG_ON(rc);
2652 }
2653
2654 void ocfs2_unblock_signals(sigset_t *oldset)
2655 {
2656 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2657 BUG_ON(rc);
2658 }
2659
2660 module_init(ocfs2_init);
2661 module_exit(ocfs2_exit);
Linux kernel - Deliverables
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