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ocfs2: Don't use MAXQUOTAS value
[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;
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;
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 oi->i_sync_tid = 0;
565 oi->i_datasync_tid = 0;
566
567 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
568 return &oi->vfs_inode;
569 }
570
571 static void ocfs2_i_callback(struct rcu_head *head)
572 {
573 struct inode *inode = container_of(head, struct inode, i_rcu);
574 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
575 }
576
577 static void ocfs2_destroy_inode(struct inode *inode)
578 {
579 call_rcu(&inode->i_rcu, ocfs2_i_callback);
580 }
581
582 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
583 unsigned int cbits)
584 {
585 unsigned int bytes = 1 << cbits;
586 unsigned int trim = bytes;
587 unsigned int bitshift = 32;
588
589 /*
590 * i_size and all block offsets in ocfs2 are always 64 bits
591 * wide. i_clusters is 32 bits, in cluster-sized units. So on
592 * 64 bit platforms, cluster size will be the limiting factor.
593 */
594
595 #if BITS_PER_LONG == 32
596 # if defined(CONFIG_LBDAF)
597 BUILD_BUG_ON(sizeof(sector_t) != 8);
598 /*
599 * We might be limited by page cache size.
600 */
601 if (bytes > PAGE_CACHE_SIZE) {
602 bytes = PAGE_CACHE_SIZE;
603 trim = 1;
604 /*
605 * Shift by 31 here so that we don't get larger than
606 * MAX_LFS_FILESIZE
607 */
608 bitshift = 31;
609 }
610 # else
611 /*
612 * We are limited by the size of sector_t. Use block size, as
613 * that's what we expose to the VFS.
614 */
615 bytes = 1 << bbits;
616 trim = 1;
617 bitshift = 31;
618 # endif
619 #endif
620
621 /*
622 * Trim by a whole cluster when we can actually approach the
623 * on-disk limits. Otherwise we can overflow i_clusters when
624 * an extent start is at the max offset.
625 */
626 return (((unsigned long long)bytes) << bitshift) - trim;
627 }
628
629 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
630 {
631 int incompat_features;
632 int ret = 0;
633 struct mount_options parsed_options;
634 struct ocfs2_super *osb = OCFS2_SB(sb);
635 u32 tmp;
636
637 sync_filesystem(sb);
638
639 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
640 !ocfs2_check_set_options(sb, &parsed_options)) {
641 ret = -EINVAL;
642 goto out;
643 }
644
645 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
646 OCFS2_MOUNT_HB_NONE;
647 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
648 ret = -EINVAL;
649 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
650 goto out;
651 }
652
653 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
654 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
655 ret = -EINVAL;
656 mlog(ML_ERROR, "Cannot change data mode on remount\n");
657 goto out;
658 }
659
660 /* Probably don't want this on remount; it might
661 * mess with other nodes */
662 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
663 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
664 ret = -EINVAL;
665 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
666 goto out;
667 }
668
669 /* We're going to/from readonly mode. */
670 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
671 /* Disable quota accounting before remounting RO */
672 if (*flags & MS_RDONLY) {
673 ret = ocfs2_susp_quotas(osb, 0);
674 if (ret < 0)
675 goto out;
676 }
677 /* Lock here so the check of HARD_RO and the potential
678 * setting of SOFT_RO is atomic. */
679 spin_lock(&osb->osb_lock);
680 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
681 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
682 ret = -EROFS;
683 goto unlock_osb;
684 }
685
686 if (*flags & MS_RDONLY) {
687 sb->s_flags |= MS_RDONLY;
688 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
689 } else {
690 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
691 mlog(ML_ERROR, "Cannot remount RDWR "
692 "filesystem due to previous errors.\n");
693 ret = -EROFS;
694 goto unlock_osb;
695 }
696 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
697 if (incompat_features) {
698 mlog(ML_ERROR, "Cannot remount RDWR because "
699 "of unsupported optional features "
700 "(%x).\n", incompat_features);
701 ret = -EINVAL;
702 goto unlock_osb;
703 }
704 sb->s_flags &= ~MS_RDONLY;
705 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
706 }
707 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
708 unlock_osb:
709 spin_unlock(&osb->osb_lock);
710 /* Enable quota accounting after remounting RW */
711 if (!ret && !(*flags & MS_RDONLY)) {
712 if (sb_any_quota_suspended(sb))
713 ret = ocfs2_susp_quotas(osb, 1);
714 else
715 ret = ocfs2_enable_quotas(osb);
716 if (ret < 0) {
717 /* Return back changes... */
718 spin_lock(&osb->osb_lock);
719 sb->s_flags |= MS_RDONLY;
720 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
721 spin_unlock(&osb->osb_lock);
722 goto out;
723 }
724 }
725 }
726
727 if (!ret) {
728 /* Only save off the new mount options in case of a successful
729 * remount. */
730 osb->s_mount_opt = parsed_options.mount_opt;
731 osb->s_atime_quantum = parsed_options.atime_quantum;
732 osb->preferred_slot = parsed_options.slot;
733 if (parsed_options.commit_interval)
734 osb->osb_commit_interval = parsed_options.commit_interval;
735
736 if (!ocfs2_is_hard_readonly(osb))
737 ocfs2_set_journal_params(osb);
738
739 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
740 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
741 MS_POSIXACL : 0);
742 }
743 out:
744 return ret;
745 }
746
747 static int ocfs2_sb_probe(struct super_block *sb,
748 struct buffer_head **bh,
749 int *sector_size,
750 struct ocfs2_blockcheck_stats *stats)
751 {
752 int status, tmpstat;
753 struct ocfs1_vol_disk_hdr *hdr;
754 struct ocfs2_dinode *di;
755 int blksize;
756
757 *bh = NULL;
758
759 /* may be > 512 */
760 *sector_size = bdev_logical_block_size(sb->s_bdev);
761 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
762 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
763 *sector_size, OCFS2_MAX_BLOCKSIZE);
764 status = -EINVAL;
765 goto bail;
766 }
767
768 /* Can this really happen? */
769 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
770 *sector_size = OCFS2_MIN_BLOCKSIZE;
771
772 /* check block zero for old format */
773 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
774 if (status < 0) {
775 mlog_errno(status);
776 goto bail;
777 }
778 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
779 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
780 mlog(ML_ERROR, "incompatible version: %u.%u\n",
781 hdr->major_version, hdr->minor_version);
782 status = -EINVAL;
783 }
784 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
785 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
786 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
787 hdr->signature);
788 status = -EINVAL;
789 }
790 brelse(*bh);
791 *bh = NULL;
792 if (status < 0) {
793 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
794 "upgraded before mounting with ocfs v2\n");
795 goto bail;
796 }
797
798 /*
799 * Now check at magic offset for 512, 1024, 2048, 4096
800 * blocksizes. 4096 is the maximum blocksize because it is
801 * the minimum clustersize.
802 */
803 status = -EINVAL;
804 for (blksize = *sector_size;
805 blksize <= OCFS2_MAX_BLOCKSIZE;
806 blksize <<= 1) {
807 tmpstat = ocfs2_get_sector(sb, bh,
808 OCFS2_SUPER_BLOCK_BLKNO,
809 blksize);
810 if (tmpstat < 0) {
811 status = tmpstat;
812 mlog_errno(status);
813 break;
814 }
815 di = (struct ocfs2_dinode *) (*bh)->b_data;
816 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
817 spin_lock_init(&stats->b_lock);
818 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
819 if (tmpstat < 0) {
820 brelse(*bh);
821 *bh = NULL;
822 }
823 if (tmpstat != -EAGAIN) {
824 status = tmpstat;
825 break;
826 }
827 }
828
829 bail:
830 return status;
831 }
832
833 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
834 {
835 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
836
837 if (osb->s_mount_opt & hb_enabled) {
838 if (ocfs2_mount_local(osb)) {
839 mlog(ML_ERROR, "Cannot heartbeat on a locally "
840 "mounted device.\n");
841 return -EINVAL;
842 }
843 if (ocfs2_userspace_stack(osb)) {
844 mlog(ML_ERROR, "Userspace stack expected, but "
845 "o2cb heartbeat arguments passed to mount\n");
846 return -EINVAL;
847 }
848 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
849 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
850 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
851 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
852 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
853 return -EINVAL;
854 }
855 }
856
857 if (!(osb->s_mount_opt & hb_enabled)) {
858 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
859 !ocfs2_userspace_stack(osb)) {
860 mlog(ML_ERROR, "Heartbeat has to be started to mount "
861 "a read-write clustered device.\n");
862 return -EINVAL;
863 }
864 }
865
866 return 0;
867 }
868
869 /*
870 * If we're using a userspace stack, mount should have passed
871 * a name that matches the disk. If not, mount should not
872 * have passed a stack.
873 */
874 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
875 struct mount_options *mopt)
876 {
877 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
878 mlog(ML_ERROR,
879 "cluster stack passed to mount, but this filesystem "
880 "does not support it\n");
881 return -EINVAL;
882 }
883
884 if (ocfs2_userspace_stack(osb) &&
885 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
886 OCFS2_STACK_LABEL_LEN)) {
887 mlog(ML_ERROR,
888 "cluster stack passed to mount (\"%s\") does not "
889 "match the filesystem (\"%s\")\n",
890 mopt->cluster_stack,
891 osb->osb_cluster_stack);
892 return -EINVAL;
893 }
894
895 return 0;
896 }
897
898 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
899 {
900 int type;
901 struct super_block *sb = osb->sb;
902 unsigned int feature[OCFS2_MAXQUOTAS] = {
903 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
904 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
905 int status = 0;
906
907 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
908 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
909 continue;
910 if (unsuspend)
911 status = dquot_resume(sb, type);
912 else {
913 struct ocfs2_mem_dqinfo *oinfo;
914
915 /* Cancel periodic syncing before suspending */
916 oinfo = sb_dqinfo(sb, type)->dqi_priv;
917 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
918 status = dquot_suspend(sb, type);
919 }
920 if (status < 0)
921 break;
922 }
923 if (status < 0)
924 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
925 "remount (error = %d).\n", status);
926 return status;
927 }
928
929 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
930 {
931 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
932 struct super_block *sb = osb->sb;
933 unsigned int feature[OCFS2_MAXQUOTAS] = {
934 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
935 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
936 unsigned int ino[OCFS2_MAXQUOTAS] = {
937 LOCAL_USER_QUOTA_SYSTEM_INODE,
938 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
939 int status;
940 int type;
941
942 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
943 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
944 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
945 continue;
946 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
947 osb->slot_num);
948 if (!inode[type]) {
949 status = -ENOENT;
950 goto out_quota_off;
951 }
952 status = dquot_enable(inode[type], type, QFMT_OCFS2,
953 DQUOT_USAGE_ENABLED);
954 if (status < 0)
955 goto out_quota_off;
956 }
957
958 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
959 iput(inode[type]);
960 return 0;
961 out_quota_off:
962 ocfs2_disable_quotas(osb);
963 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
964 iput(inode[type]);
965 mlog_errno(status);
966 return status;
967 }
968
969 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
970 {
971 int type;
972 struct inode *inode;
973 struct super_block *sb = osb->sb;
974 struct ocfs2_mem_dqinfo *oinfo;
975
976 /* We mostly ignore errors in this function because there's not much
977 * we can do when we see them */
978 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
979 if (!sb_has_quota_loaded(sb, type))
980 continue;
981 /* Cancel periodic syncing before we grab dqonoff_mutex */
982 oinfo = sb_dqinfo(sb, type)->dqi_priv;
983 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
984 inode = igrab(sb->s_dquot.files[type]);
985 /* Turn off quotas. This will remove all dquot structures from
986 * memory and so they will be automatically synced to global
987 * quota files */
988 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
989 DQUOT_LIMITS_ENABLED);
990 if (!inode)
991 continue;
992 iput(inode);
993 }
994 }
995
996 /* Handle quota on quotactl */
997 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
998 {
999 unsigned int feature[OCFS2_MAXQUOTAS] = {
1000 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
1001 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
1002
1003 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
1004 return -EINVAL;
1005
1006 return dquot_enable(sb_dqopt(sb)->files[type], type,
1007 format_id, DQUOT_LIMITS_ENABLED);
1008 }
1009
1010 /* Handle quota off quotactl */
1011 static int ocfs2_quota_off(struct super_block *sb, int type)
1012 {
1013 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1014 }
1015
1016 static const struct quotactl_ops ocfs2_quotactl_ops = {
1017 .quota_on_meta = ocfs2_quota_on,
1018 .quota_off = ocfs2_quota_off,
1019 .quota_sync = dquot_quota_sync,
1020 .get_info = dquot_get_dqinfo,
1021 .set_info = dquot_set_dqinfo,
1022 .get_dqblk = dquot_get_dqblk,
1023 .set_dqblk = dquot_set_dqblk,
1024 };
1025
1026 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1027 {
1028 struct dentry *root;
1029 int status, sector_size;
1030 struct mount_options parsed_options;
1031 struct inode *inode = NULL;
1032 struct ocfs2_super *osb = NULL;
1033 struct buffer_head *bh = NULL;
1034 char nodestr[12];
1035 struct ocfs2_blockcheck_stats stats;
1036
1037 trace_ocfs2_fill_super(sb, data, silent);
1038
1039 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1040 status = -EINVAL;
1041 goto read_super_error;
1042 }
1043
1044 /* probe for superblock */
1045 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1046 if (status < 0) {
1047 mlog(ML_ERROR, "superblock probe failed!\n");
1048 goto read_super_error;
1049 }
1050
1051 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1052 osb = OCFS2_SB(sb);
1053 if (status < 0) {
1054 mlog_errno(status);
1055 goto read_super_error;
1056 }
1057 brelse(bh);
1058 bh = NULL;
1059
1060 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1061 status = -EINVAL;
1062 goto read_super_error;
1063 }
1064 osb->s_mount_opt = parsed_options.mount_opt;
1065 osb->s_atime_quantum = parsed_options.atime_quantum;
1066 osb->preferred_slot = parsed_options.slot;
1067 osb->osb_commit_interval = parsed_options.commit_interval;
1068
1069 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1070 osb->osb_resv_level = parsed_options.resv_level;
1071 osb->osb_dir_resv_level = parsed_options.resv_level;
1072 if (parsed_options.dir_resv_level == -1)
1073 osb->osb_dir_resv_level = parsed_options.resv_level;
1074 else
1075 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1076
1077 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1078 if (status)
1079 goto read_super_error;
1080
1081 sb->s_magic = OCFS2_SUPER_MAGIC;
1082
1083 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1084 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1085
1086 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1087 * heartbeat=none */
1088 if (bdev_read_only(sb->s_bdev)) {
1089 if (!(sb->s_flags & MS_RDONLY)) {
1090 status = -EACCES;
1091 mlog(ML_ERROR, "Readonly device detected but readonly "
1092 "mount was not specified.\n");
1093 goto read_super_error;
1094 }
1095
1096 /* You should not be able to start a local heartbeat
1097 * on a readonly device. */
1098 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1099 status = -EROFS;
1100 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1101 "device.\n");
1102 goto read_super_error;
1103 }
1104
1105 status = ocfs2_check_journals_nolocks(osb);
1106 if (status < 0) {
1107 if (status == -EROFS)
1108 mlog(ML_ERROR, "Recovery required on readonly "
1109 "file system, but write access is "
1110 "unavailable.\n");
1111 else
1112 mlog_errno(status);
1113 goto read_super_error;
1114 }
1115
1116 ocfs2_set_ro_flag(osb, 1);
1117
1118 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1119 "Cluster services will not be used for this mount. "
1120 "Recovery will be skipped.\n", osb->dev_str);
1121 }
1122
1123 if (!ocfs2_is_hard_readonly(osb)) {
1124 if (sb->s_flags & MS_RDONLY)
1125 ocfs2_set_ro_flag(osb, 0);
1126 }
1127
1128 status = ocfs2_verify_heartbeat(osb);
1129 if (status < 0) {
1130 mlog_errno(status);
1131 goto read_super_error;
1132 }
1133
1134 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1135 ocfs2_debugfs_root);
1136 if (!osb->osb_debug_root) {
1137 status = -EINVAL;
1138 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1139 goto read_super_error;
1140 }
1141
1142 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1143 osb->osb_debug_root,
1144 osb,
1145 &ocfs2_osb_debug_fops);
1146 if (!osb->osb_ctxt) {
1147 status = -EINVAL;
1148 mlog_errno(status);
1149 goto read_super_error;
1150 }
1151
1152 if (ocfs2_meta_ecc(osb)) {
1153 status = ocfs2_blockcheck_stats_debugfs_install(
1154 &osb->osb_ecc_stats,
1155 osb->osb_debug_root);
1156 if (status) {
1157 mlog(ML_ERROR,
1158 "Unable to create blockcheck statistics "
1159 "files\n");
1160 goto read_super_error;
1161 }
1162 }
1163
1164 status = ocfs2_mount_volume(sb);
1165 if (status < 0)
1166 goto read_super_error;
1167
1168 if (osb->root_inode)
1169 inode = igrab(osb->root_inode);
1170
1171 if (!inode) {
1172 status = -EIO;
1173 mlog_errno(status);
1174 goto read_super_error;
1175 }
1176
1177 root = d_make_root(inode);
1178 if (!root) {
1179 status = -ENOMEM;
1180 mlog_errno(status);
1181 goto read_super_error;
1182 }
1183
1184 sb->s_root = root;
1185
1186 ocfs2_complete_mount_recovery(osb);
1187
1188 if (ocfs2_mount_local(osb))
1189 snprintf(nodestr, sizeof(nodestr), "local");
1190 else
1191 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1192
1193 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1194 "with %s data mode.\n",
1195 osb->dev_str, nodestr, osb->slot_num,
1196 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1197 "ordered");
1198
1199 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1200 wake_up(&osb->osb_mount_event);
1201
1202 /* Now we can initialize quotas because we can afford to wait
1203 * for cluster locks recovery now. That also means that truncation
1204 * log recovery can happen but that waits for proper quota setup */
1205 if (!(sb->s_flags & MS_RDONLY)) {
1206 status = ocfs2_enable_quotas(osb);
1207 if (status < 0) {
1208 /* We have to err-out specially here because
1209 * s_root is already set */
1210 mlog_errno(status);
1211 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1212 wake_up(&osb->osb_mount_event);
1213 return status;
1214 }
1215 }
1216
1217 ocfs2_complete_quota_recovery(osb);
1218
1219 /* Now we wake up again for processes waiting for quotas */
1220 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1221 wake_up(&osb->osb_mount_event);
1222
1223 /* Start this when the mount is almost sure of being successful */
1224 ocfs2_orphan_scan_start(osb);
1225
1226 return status;
1227
1228 read_super_error:
1229 brelse(bh);
1230
1231 if (osb) {
1232 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1233 wake_up(&osb->osb_mount_event);
1234 ocfs2_dismount_volume(sb, 1);
1235 }
1236
1237 if (status)
1238 mlog_errno(status);
1239 return status;
1240 }
1241
1242 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1243 int flags,
1244 const char *dev_name,
1245 void *data)
1246 {
1247 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1248 }
1249
1250 static struct file_system_type ocfs2_fs_type = {
1251 .owner = THIS_MODULE,
1252 .name = "ocfs2",
1253 .mount = ocfs2_mount,
1254 .kill_sb = kill_block_super,
1255 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1256 .next = NULL
1257 };
1258 MODULE_ALIAS_FS("ocfs2");
1259
1260 static int ocfs2_check_set_options(struct super_block *sb,
1261 struct mount_options *options)
1262 {
1263 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1264 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1265 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1266 mlog(ML_ERROR, "User quotas were requested, but this "
1267 "filesystem does not have the feature enabled.\n");
1268 return 0;
1269 }
1270 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1271 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1272 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1273 mlog(ML_ERROR, "Group quotas were requested, but this "
1274 "filesystem does not have the feature enabled.\n");
1275 return 0;
1276 }
1277 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1278 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1279 mlog(ML_ERROR, "ACL support requested but extended attributes "
1280 "feature is not enabled\n");
1281 return 0;
1282 }
1283 /* No ACL setting specified? Use XATTR feature... */
1284 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1285 OCFS2_MOUNT_NO_POSIX_ACL))) {
1286 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1287 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1288 else
1289 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1290 }
1291 return 1;
1292 }
1293
1294 static int ocfs2_parse_options(struct super_block *sb,
1295 char *options,
1296 struct mount_options *mopt,
1297 int is_remount)
1298 {
1299 int status, user_stack = 0;
1300 char *p;
1301 u32 tmp;
1302
1303 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1304
1305 mopt->commit_interval = 0;
1306 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1307 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1308 mopt->slot = OCFS2_INVALID_SLOT;
1309 mopt->localalloc_opt = -1;
1310 mopt->cluster_stack[0] = '\0';
1311 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1312 mopt->dir_resv_level = -1;
1313
1314 if (!options) {
1315 status = 1;
1316 goto bail;
1317 }
1318
1319 while ((p = strsep(&options, ",")) != NULL) {
1320 int token, option;
1321 substring_t args[MAX_OPT_ARGS];
1322
1323 if (!*p)
1324 continue;
1325
1326 token = match_token(p, tokens, args);
1327 switch (token) {
1328 case Opt_hb_local:
1329 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1330 break;
1331 case Opt_hb_none:
1332 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1333 break;
1334 case Opt_hb_global:
1335 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1336 break;
1337 case Opt_barrier:
1338 if (match_int(&args[0], &option)) {
1339 status = 0;
1340 goto bail;
1341 }
1342 if (option)
1343 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1344 else
1345 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1346 break;
1347 case Opt_intr:
1348 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1349 break;
1350 case Opt_nointr:
1351 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1352 break;
1353 case Opt_err_panic:
1354 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1355 break;
1356 case Opt_err_ro:
1357 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1358 break;
1359 case Opt_data_ordered:
1360 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1361 break;
1362 case Opt_data_writeback:
1363 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1364 break;
1365 case Opt_user_xattr:
1366 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1367 break;
1368 case Opt_nouser_xattr:
1369 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1370 break;
1371 case Opt_atime_quantum:
1372 if (match_int(&args[0], &option)) {
1373 status = 0;
1374 goto bail;
1375 }
1376 if (option >= 0)
1377 mopt->atime_quantum = option;
1378 break;
1379 case Opt_slot:
1380 option = 0;
1381 if (match_int(&args[0], &option)) {
1382 status = 0;
1383 goto bail;
1384 }
1385 if (option)
1386 mopt->slot = (s16)option;
1387 break;
1388 case Opt_commit:
1389 option = 0;
1390 if (match_int(&args[0], &option)) {
1391 status = 0;
1392 goto bail;
1393 }
1394 if (option < 0)
1395 return 0;
1396 if (option == 0)
1397 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1398 mopt->commit_interval = HZ * option;
1399 break;
1400 case Opt_localalloc:
1401 option = 0;
1402 if (match_int(&args[0], &option)) {
1403 status = 0;
1404 goto bail;
1405 }
1406 if (option >= 0)
1407 mopt->localalloc_opt = option;
1408 break;
1409 case Opt_localflocks:
1410 /*
1411 * Changing this during remount could race
1412 * flock() requests, or "unbalance" existing
1413 * ones (e.g., a lock is taken in one mode but
1414 * dropped in the other). If users care enough
1415 * to flip locking modes during remount, we
1416 * could add a "local" flag to individual
1417 * flock structures for proper tracking of
1418 * state.
1419 */
1420 if (!is_remount)
1421 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1422 break;
1423 case Opt_stack:
1424 /* Check both that the option we were passed
1425 * is of the right length and that it is a proper
1426 * string of the right length.
1427 */
1428 if (((args[0].to - args[0].from) !=
1429 OCFS2_STACK_LABEL_LEN) ||
1430 (strnlen(args[0].from,
1431 OCFS2_STACK_LABEL_LEN) !=
1432 OCFS2_STACK_LABEL_LEN)) {
1433 mlog(ML_ERROR,
1434 "Invalid cluster_stack option\n");
1435 status = 0;
1436 goto bail;
1437 }
1438 memcpy(mopt->cluster_stack, args[0].from,
1439 OCFS2_STACK_LABEL_LEN);
1440 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1441 /*
1442 * Open code the memcmp here as we don't have
1443 * an osb to pass to
1444 * ocfs2_userspace_stack().
1445 */
1446 if (memcmp(mopt->cluster_stack,
1447 OCFS2_CLASSIC_CLUSTER_STACK,
1448 OCFS2_STACK_LABEL_LEN))
1449 user_stack = 1;
1450 break;
1451 case Opt_inode64:
1452 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1453 break;
1454 case Opt_usrquota:
1455 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1456 break;
1457 case Opt_grpquota:
1458 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1459 break;
1460 case Opt_coherency_buffered:
1461 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1462 break;
1463 case Opt_coherency_full:
1464 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1465 break;
1466 case Opt_acl:
1467 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1468 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1469 break;
1470 case Opt_noacl:
1471 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1472 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1473 break;
1474 case Opt_resv_level:
1475 if (is_remount)
1476 break;
1477 if (match_int(&args[0], &option)) {
1478 status = 0;
1479 goto bail;
1480 }
1481 if (option >= OCFS2_MIN_RESV_LEVEL &&
1482 option < OCFS2_MAX_RESV_LEVEL)
1483 mopt->resv_level = option;
1484 break;
1485 case Opt_dir_resv_level:
1486 if (is_remount)
1487 break;
1488 if (match_int(&args[0], &option)) {
1489 status = 0;
1490 goto bail;
1491 }
1492 if (option >= OCFS2_MIN_RESV_LEVEL &&
1493 option < OCFS2_MAX_RESV_LEVEL)
1494 mopt->dir_resv_level = option;
1495 break;
1496 default:
1497 mlog(ML_ERROR,
1498 "Unrecognized mount option \"%s\" "
1499 "or missing value\n", p);
1500 status = 0;
1501 goto bail;
1502 }
1503 }
1504
1505 if (user_stack == 0) {
1506 /* Ensure only one heartbeat mode */
1507 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1508 OCFS2_MOUNT_HB_GLOBAL |
1509 OCFS2_MOUNT_HB_NONE);
1510 if (hweight32(tmp) != 1) {
1511 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1512 status = 0;
1513 goto bail;
1514 }
1515 }
1516
1517 status = 1;
1518
1519 bail:
1520 return status;
1521 }
1522
1523 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1524 {
1525 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1526 unsigned long opts = osb->s_mount_opt;
1527 unsigned int local_alloc_megs;
1528
1529 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1530 seq_printf(s, ",_netdev");
1531 if (opts & OCFS2_MOUNT_HB_LOCAL)
1532 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1533 else
1534 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1535 } else
1536 seq_printf(s, ",%s", OCFS2_HB_NONE);
1537
1538 if (opts & OCFS2_MOUNT_NOINTR)
1539 seq_printf(s, ",nointr");
1540
1541 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1542 seq_printf(s, ",data=writeback");
1543 else
1544 seq_printf(s, ",data=ordered");
1545
1546 if (opts & OCFS2_MOUNT_BARRIER)
1547 seq_printf(s, ",barrier=1");
1548
1549 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1550 seq_printf(s, ",errors=panic");
1551 else
1552 seq_printf(s, ",errors=remount-ro");
1553
1554 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1555 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1556
1557 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1558
1559 if (osb->osb_commit_interval)
1560 seq_printf(s, ",commit=%u",
1561 (unsigned) (osb->osb_commit_interval / HZ));
1562
1563 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1564 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1565 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1566
1567 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1568 seq_printf(s, ",localflocks,");
1569
1570 if (osb->osb_cluster_stack[0])
1571 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1572 osb->osb_cluster_stack);
1573 if (opts & OCFS2_MOUNT_USRQUOTA)
1574 seq_printf(s, ",usrquota");
1575 if (opts & OCFS2_MOUNT_GRPQUOTA)
1576 seq_printf(s, ",grpquota");
1577
1578 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1579 seq_printf(s, ",coherency=buffered");
1580 else
1581 seq_printf(s, ",coherency=full");
1582
1583 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1584 seq_printf(s, ",nouser_xattr");
1585 else
1586 seq_printf(s, ",user_xattr");
1587
1588 if (opts & OCFS2_MOUNT_INODE64)
1589 seq_printf(s, ",inode64");
1590
1591 if (opts & OCFS2_MOUNT_POSIX_ACL)
1592 seq_printf(s, ",acl");
1593 else
1594 seq_printf(s, ",noacl");
1595
1596 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1597 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1598
1599 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1600 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1601
1602 return 0;
1603 }
1604
1605 static int __init ocfs2_init(void)
1606 {
1607 int status;
1608
1609 status = init_ocfs2_uptodate_cache();
1610 if (status < 0)
1611 goto out1;
1612
1613 status = ocfs2_initialize_mem_caches();
1614 if (status < 0)
1615 goto out2;
1616
1617 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1618 if (!ocfs2_wq) {
1619 status = -ENOMEM;
1620 goto out3;
1621 }
1622
1623 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1624 if (!ocfs2_debugfs_root) {
1625 status = -EFAULT;
1626 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1627 }
1628
1629 ocfs2_set_locking_protocol();
1630
1631 status = register_quota_format(&ocfs2_quota_format);
1632 if (status < 0)
1633 goto out4;
1634 status = register_filesystem(&ocfs2_fs_type);
1635 if (!status)
1636 return 0;
1637
1638 unregister_quota_format(&ocfs2_quota_format);
1639 out4:
1640 destroy_workqueue(ocfs2_wq);
1641 debugfs_remove(ocfs2_debugfs_root);
1642 out3:
1643 ocfs2_free_mem_caches();
1644 out2:
1645 exit_ocfs2_uptodate_cache();
1646 out1:
1647 mlog_errno(status);
1648 return status;
1649 }
1650
1651 static void __exit ocfs2_exit(void)
1652 {
1653 if (ocfs2_wq) {
1654 flush_workqueue(ocfs2_wq);
1655 destroy_workqueue(ocfs2_wq);
1656 }
1657
1658 unregister_quota_format(&ocfs2_quota_format);
1659
1660 debugfs_remove(ocfs2_debugfs_root);
1661
1662 ocfs2_free_mem_caches();
1663
1664 unregister_filesystem(&ocfs2_fs_type);
1665
1666 exit_ocfs2_uptodate_cache();
1667 }
1668
1669 static void ocfs2_put_super(struct super_block *sb)
1670 {
1671 trace_ocfs2_put_super(sb);
1672
1673 ocfs2_sync_blockdev(sb);
1674 ocfs2_dismount_volume(sb, 0);
1675 }
1676
1677 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1678 {
1679 struct ocfs2_super *osb;
1680 u32 numbits, freebits;
1681 int status;
1682 struct ocfs2_dinode *bm_lock;
1683 struct buffer_head *bh = NULL;
1684 struct inode *inode = NULL;
1685
1686 trace_ocfs2_statfs(dentry->d_sb, buf);
1687
1688 osb = OCFS2_SB(dentry->d_sb);
1689
1690 inode = ocfs2_get_system_file_inode(osb,
1691 GLOBAL_BITMAP_SYSTEM_INODE,
1692 OCFS2_INVALID_SLOT);
1693 if (!inode) {
1694 mlog(ML_ERROR, "failed to get bitmap inode\n");
1695 status = -EIO;
1696 goto bail;
1697 }
1698
1699 status = ocfs2_inode_lock(inode, &bh, 0);
1700 if (status < 0) {
1701 mlog_errno(status);
1702 goto bail;
1703 }
1704
1705 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1706
1707 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1708 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1709
1710 buf->f_type = OCFS2_SUPER_MAGIC;
1711 buf->f_bsize = dentry->d_sb->s_blocksize;
1712 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1713 buf->f_blocks = ((sector_t) numbits) *
1714 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1715 buf->f_bfree = ((sector_t) freebits) *
1716 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1717 buf->f_bavail = buf->f_bfree;
1718 buf->f_files = numbits;
1719 buf->f_ffree = freebits;
1720 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1721 & 0xFFFFFFFFUL;
1722 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1723 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1724
1725 brelse(bh);
1726
1727 ocfs2_inode_unlock(inode, 0);
1728 status = 0;
1729 bail:
1730 if (inode)
1731 iput(inode);
1732
1733 if (status)
1734 mlog_errno(status);
1735
1736 return status;
1737 }
1738
1739 static void ocfs2_inode_init_once(void *data)
1740 {
1741 struct ocfs2_inode_info *oi = data;
1742
1743 oi->ip_flags = 0;
1744 oi->ip_open_count = 0;
1745 spin_lock_init(&oi->ip_lock);
1746 ocfs2_extent_map_init(&oi->vfs_inode);
1747 INIT_LIST_HEAD(&oi->ip_io_markers);
1748 oi->ip_dir_start_lookup = 0;
1749 mutex_init(&oi->ip_unaligned_aio);
1750 init_rwsem(&oi->ip_alloc_sem);
1751 init_rwsem(&oi->ip_xattr_sem);
1752 mutex_init(&oi->ip_io_mutex);
1753
1754 oi->ip_blkno = 0ULL;
1755 oi->ip_clusters = 0;
1756
1757 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1758
1759 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1760 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1761 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1762
1763 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1764 &ocfs2_inode_caching_ops);
1765
1766 inode_init_once(&oi->vfs_inode);
1767 }
1768
1769 static int ocfs2_initialize_mem_caches(void)
1770 {
1771 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1772 sizeof(struct ocfs2_inode_info),
1773 0,
1774 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1775 SLAB_MEM_SPREAD),
1776 ocfs2_inode_init_once);
1777 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1778 sizeof(struct ocfs2_dquot),
1779 0,
1780 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1781 SLAB_MEM_SPREAD),
1782 NULL);
1783 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1784 sizeof(struct ocfs2_quota_chunk),
1785 0,
1786 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1787 NULL);
1788 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1789 !ocfs2_qf_chunk_cachep) {
1790 if (ocfs2_inode_cachep)
1791 kmem_cache_destroy(ocfs2_inode_cachep);
1792 if (ocfs2_dquot_cachep)
1793 kmem_cache_destroy(ocfs2_dquot_cachep);
1794 if (ocfs2_qf_chunk_cachep)
1795 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1796 return -ENOMEM;
1797 }
1798
1799 return 0;
1800 }
1801
1802 static void ocfs2_free_mem_caches(void)
1803 {
1804 /*
1805 * Make sure all delayed rcu free inodes are flushed before we
1806 * destroy cache.
1807 */
1808 rcu_barrier();
1809 if (ocfs2_inode_cachep)
1810 kmem_cache_destroy(ocfs2_inode_cachep);
1811 ocfs2_inode_cachep = NULL;
1812
1813 if (ocfs2_dquot_cachep)
1814 kmem_cache_destroy(ocfs2_dquot_cachep);
1815 ocfs2_dquot_cachep = NULL;
1816
1817 if (ocfs2_qf_chunk_cachep)
1818 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1819 ocfs2_qf_chunk_cachep = NULL;
1820 }
1821
1822 static int ocfs2_get_sector(struct super_block *sb,
1823 struct buffer_head **bh,
1824 int block,
1825 int sect_size)
1826 {
1827 if (!sb_set_blocksize(sb, sect_size)) {
1828 mlog(ML_ERROR, "unable to set blocksize\n");
1829 return -EIO;
1830 }
1831
1832 *bh = sb_getblk(sb, block);
1833 if (!*bh) {
1834 mlog_errno(-ENOMEM);
1835 return -ENOMEM;
1836 }
1837 lock_buffer(*bh);
1838 if (!buffer_dirty(*bh))
1839 clear_buffer_uptodate(*bh);
1840 unlock_buffer(*bh);
1841 ll_rw_block(READ, 1, bh);
1842 wait_on_buffer(*bh);
1843 if (!buffer_uptodate(*bh)) {
1844 mlog_errno(-EIO);
1845 brelse(*bh);
1846 *bh = NULL;
1847 return -EIO;
1848 }
1849
1850 return 0;
1851 }
1852
1853 static int ocfs2_mount_volume(struct super_block *sb)
1854 {
1855 int status = 0;
1856 int unlock_super = 0;
1857 struct ocfs2_super *osb = OCFS2_SB(sb);
1858
1859 if (ocfs2_is_hard_readonly(osb))
1860 goto leave;
1861
1862 status = ocfs2_dlm_init(osb);
1863 if (status < 0) {
1864 mlog_errno(status);
1865 goto leave;
1866 }
1867
1868 status = ocfs2_super_lock(osb, 1);
1869 if (status < 0) {
1870 mlog_errno(status);
1871 goto leave;
1872 }
1873 unlock_super = 1;
1874
1875 /* This will load up the node map and add ourselves to it. */
1876 status = ocfs2_find_slot(osb);
1877 if (status < 0) {
1878 mlog_errno(status);
1879 goto leave;
1880 }
1881
1882 /* load all node-local system inodes */
1883 status = ocfs2_init_local_system_inodes(osb);
1884 if (status < 0) {
1885 mlog_errno(status);
1886 goto leave;
1887 }
1888
1889 status = ocfs2_check_volume(osb);
1890 if (status < 0) {
1891 mlog_errno(status);
1892 goto leave;
1893 }
1894
1895 status = ocfs2_truncate_log_init(osb);
1896 if (status < 0)
1897 mlog_errno(status);
1898
1899 leave:
1900 if (unlock_super)
1901 ocfs2_super_unlock(osb, 1);
1902
1903 return status;
1904 }
1905
1906 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1907 {
1908 int tmp, hangup_needed = 0;
1909 struct ocfs2_super *osb = NULL;
1910 char nodestr[12];
1911
1912 trace_ocfs2_dismount_volume(sb);
1913
1914 BUG_ON(!sb);
1915 osb = OCFS2_SB(sb);
1916 BUG_ON(!osb);
1917
1918 debugfs_remove(osb->osb_ctxt);
1919
1920 /* Orphan scan should be stopped as early as possible */
1921 ocfs2_orphan_scan_stop(osb);
1922
1923 ocfs2_disable_quotas(osb);
1924
1925 /* All dquots should be freed by now */
1926 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1927 /* Wait for worker to be done with the work structure in osb */
1928 cancel_work_sync(&osb->dquot_drop_work);
1929
1930 ocfs2_shutdown_local_alloc(osb);
1931
1932 ocfs2_truncate_log_shutdown(osb);
1933
1934 /* This will disable recovery and flush any recovery work. */
1935 ocfs2_recovery_exit(osb);
1936
1937 ocfs2_journal_shutdown(osb);
1938
1939 ocfs2_sync_blockdev(sb);
1940
1941 ocfs2_purge_refcount_trees(osb);
1942
1943 /* No cluster connection means we've failed during mount, so skip
1944 * all the steps which depended on that to complete. */
1945 if (osb->cconn) {
1946 tmp = ocfs2_super_lock(osb, 1);
1947 if (tmp < 0) {
1948 mlog_errno(tmp);
1949 return;
1950 }
1951 }
1952
1953 if (osb->slot_num != OCFS2_INVALID_SLOT)
1954 ocfs2_put_slot(osb);
1955
1956 if (osb->cconn)
1957 ocfs2_super_unlock(osb, 1);
1958
1959 ocfs2_release_system_inodes(osb);
1960
1961 /*
1962 * If we're dismounting due to mount error, mount.ocfs2 will clean
1963 * up heartbeat. If we're a local mount, there is no heartbeat.
1964 * If we failed before we got a uuid_str yet, we can't stop
1965 * heartbeat. Otherwise, do it.
1966 */
1967 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1968 !ocfs2_is_hard_readonly(osb))
1969 hangup_needed = 1;
1970
1971 if (osb->cconn)
1972 ocfs2_dlm_shutdown(osb, hangup_needed);
1973
1974 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1975 debugfs_remove(osb->osb_debug_root);
1976
1977 if (hangup_needed)
1978 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1979
1980 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1981
1982 if (ocfs2_mount_local(osb))
1983 snprintf(nodestr, sizeof(nodestr), "local");
1984 else
1985 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1986
1987 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1988 osb->dev_str, nodestr);
1989
1990 ocfs2_delete_osb(osb);
1991 kfree(osb);
1992 sb->s_dev = 0;
1993 sb->s_fs_info = NULL;
1994 }
1995
1996 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1997 unsigned uuid_bytes)
1998 {
1999 int i, ret;
2000 char *ptr;
2001
2002 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2003
2004 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2005 if (osb->uuid_str == NULL)
2006 return -ENOMEM;
2007
2008 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2009 /* print with null */
2010 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2011 if (ret != 2) /* drop super cleans up */
2012 return -EINVAL;
2013 /* then only advance past the last char */
2014 ptr += 2;
2015 }
2016
2017 return 0;
2018 }
2019
2020 /* Make sure entire volume is addressable by our journal. Requires
2021 osb_clusters_at_boot to be valid and for the journal to have been
2022 initialized by ocfs2_journal_init(). */
2023 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2024 {
2025 int status = 0;
2026 u64 max_block =
2027 ocfs2_clusters_to_blocks(osb->sb,
2028 osb->osb_clusters_at_boot) - 1;
2029
2030 /* 32-bit block number is always OK. */
2031 if (max_block <= (u32)~0ULL)
2032 goto out;
2033
2034 /* Volume is "huge", so see if our journal is new enough to
2035 support it. */
2036 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2037 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2038 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2039 JBD2_FEATURE_INCOMPAT_64BIT))) {
2040 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2041 "Enable the 'block64' journal option with tunefs.ocfs2");
2042 status = -EFBIG;
2043 goto out;
2044 }
2045
2046 out:
2047 return status;
2048 }
2049
2050 static int ocfs2_initialize_super(struct super_block *sb,
2051 struct buffer_head *bh,
2052 int sector_size,
2053 struct ocfs2_blockcheck_stats *stats)
2054 {
2055 int status;
2056 int i, cbits, bbits;
2057 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2058 struct inode *inode = NULL;
2059 struct ocfs2_journal *journal;
2060 struct ocfs2_super *osb;
2061 u64 total_blocks;
2062
2063 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2064 if (!osb) {
2065 status = -ENOMEM;
2066 mlog_errno(status);
2067 goto bail;
2068 }
2069
2070 sb->s_fs_info = osb;
2071 sb->s_op = &ocfs2_sops;
2072 sb->s_d_op = &ocfs2_dentry_ops;
2073 sb->s_export_op = &ocfs2_export_ops;
2074 sb->s_qcop = &ocfs2_quotactl_ops;
2075 sb->dq_op = &ocfs2_quota_operations;
2076 sb->s_xattr = ocfs2_xattr_handlers;
2077 sb->s_time_gran = 1;
2078 sb->s_flags |= MS_NOATIME;
2079 /* this is needed to support O_LARGEFILE */
2080 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2081 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2082 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2083
2084 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2085
2086 for (i = 0; i < 3; i++)
2087 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2088 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2089
2090 osb->sb = sb;
2091 /* Save off for ocfs2_rw_direct */
2092 osb->s_sectsize_bits = blksize_bits(sector_size);
2093 BUG_ON(!osb->s_sectsize_bits);
2094
2095 spin_lock_init(&osb->dc_task_lock);
2096 init_waitqueue_head(&osb->dc_event);
2097 osb->dc_work_sequence = 0;
2098 osb->dc_wake_sequence = 0;
2099 INIT_LIST_HEAD(&osb->blocked_lock_list);
2100 osb->blocked_lock_count = 0;
2101 spin_lock_init(&osb->osb_lock);
2102 spin_lock_init(&osb->osb_xattr_lock);
2103 ocfs2_init_steal_slots(osb);
2104
2105 mutex_init(&osb->system_file_mutex);
2106
2107 atomic_set(&osb->alloc_stats.moves, 0);
2108 atomic_set(&osb->alloc_stats.local_data, 0);
2109 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2110 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2111 atomic_set(&osb->alloc_stats.bg_extends, 0);
2112
2113 /* Copy the blockcheck stats from the superblock probe */
2114 osb->osb_ecc_stats = *stats;
2115
2116 ocfs2_init_node_maps(osb);
2117
2118 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2119 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2120
2121 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2122 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2123 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2124 osb->max_slots);
2125 status = -EINVAL;
2126 goto bail;
2127 }
2128
2129 ocfs2_orphan_scan_init(osb);
2130
2131 status = ocfs2_recovery_init(osb);
2132 if (status) {
2133 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2134 mlog_errno(status);
2135 goto bail;
2136 }
2137
2138 init_waitqueue_head(&osb->checkpoint_event);
2139
2140 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2141
2142 osb->slot_num = OCFS2_INVALID_SLOT;
2143
2144 osb->s_xattr_inline_size = le16_to_cpu(
2145 di->id2.i_super.s_xattr_inline_size);
2146
2147 osb->local_alloc_state = OCFS2_LA_UNUSED;
2148 osb->local_alloc_bh = NULL;
2149 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2150
2151 init_waitqueue_head(&osb->osb_mount_event);
2152
2153 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2154 if (status) {
2155 mlog_errno(status);
2156 goto bail;
2157 }
2158
2159 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2160 if (!osb->vol_label) {
2161 mlog(ML_ERROR, "unable to alloc vol label\n");
2162 status = -ENOMEM;
2163 goto bail;
2164 }
2165
2166 osb->slot_recovery_generations =
2167 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2168 GFP_KERNEL);
2169 if (!osb->slot_recovery_generations) {
2170 status = -ENOMEM;
2171 mlog_errno(status);
2172 goto bail;
2173 }
2174
2175 init_waitqueue_head(&osb->osb_wipe_event);
2176 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2177 sizeof(*osb->osb_orphan_wipes),
2178 GFP_KERNEL);
2179 if (!osb->osb_orphan_wipes) {
2180 status = -ENOMEM;
2181 mlog_errno(status);
2182 goto bail;
2183 }
2184
2185 osb->osb_rf_lock_tree = RB_ROOT;
2186
2187 osb->s_feature_compat =
2188 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2189 osb->s_feature_ro_compat =
2190 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2191 osb->s_feature_incompat =
2192 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2193
2194 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2195 mlog(ML_ERROR, "couldn't mount because of unsupported "
2196 "optional features (%x).\n", i);
2197 status = -EINVAL;
2198 goto bail;
2199 }
2200 if (!(osb->sb->s_flags & MS_RDONLY) &&
2201 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2202 mlog(ML_ERROR, "couldn't mount RDWR because of "
2203 "unsupported optional features (%x).\n", i);
2204 status = -EINVAL;
2205 goto bail;
2206 }
2207
2208 if (ocfs2_clusterinfo_valid(osb)) {
2209 osb->osb_stackflags =
2210 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2211 strlcpy(osb->osb_cluster_stack,
2212 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2213 OCFS2_STACK_LABEL_LEN + 1);
2214 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2215 mlog(ML_ERROR,
2216 "couldn't mount because of an invalid "
2217 "cluster stack label (%s) \n",
2218 osb->osb_cluster_stack);
2219 status = -EINVAL;
2220 goto bail;
2221 }
2222 strlcpy(osb->osb_cluster_name,
2223 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2224 OCFS2_CLUSTER_NAME_LEN + 1);
2225 } else {
2226 /* The empty string is identical with classic tools that
2227 * don't know about s_cluster_info. */
2228 osb->osb_cluster_stack[0] = '\0';
2229 }
2230
2231 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2232
2233 /* FIXME
2234 * This should be done in ocfs2_journal_init(), but unknown
2235 * ordering issues will cause the filesystem to crash.
2236 * If anyone wants to figure out what part of the code
2237 * refers to osb->journal before ocfs2_journal_init() is run,
2238 * be my guest.
2239 */
2240 /* initialize our journal structure */
2241
2242 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2243 if (!journal) {
2244 mlog(ML_ERROR, "unable to alloc journal\n");
2245 status = -ENOMEM;
2246 goto bail;
2247 }
2248 osb->journal = journal;
2249 journal->j_osb = osb;
2250
2251 atomic_set(&journal->j_num_trans, 0);
2252 init_rwsem(&journal->j_trans_barrier);
2253 init_waitqueue_head(&journal->j_checkpointed);
2254 spin_lock_init(&journal->j_lock);
2255 journal->j_trans_id = (unsigned long) 1;
2256 INIT_LIST_HEAD(&journal->j_la_cleanups);
2257 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2258 journal->j_state = OCFS2_JOURNAL_FREE;
2259
2260 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2261 init_llist_head(&osb->dquot_drop_list);
2262
2263 /* get some pseudo constants for clustersize bits */
2264 osb->s_clustersize_bits =
2265 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2266 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2267
2268 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2269 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2270 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2271 osb->s_clustersize);
2272 status = -EINVAL;
2273 goto bail;
2274 }
2275
2276 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2277 le32_to_cpu(di->i_clusters));
2278
2279 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2280 total_blocks);
2281 if (status) {
2282 mlog(ML_ERROR, "Volume too large "
2283 "to mount safely on this system");
2284 status = -EFBIG;
2285 goto bail;
2286 }
2287
2288 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2289 sizeof(di->id2.i_super.s_uuid))) {
2290 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2291 status = -ENOMEM;
2292 goto bail;
2293 }
2294
2295 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2296 OCFS2_MAX_VOL_LABEL_LEN);
2297 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2298 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2299 osb->first_cluster_group_blkno =
2300 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2301 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2302 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2303 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2304 (unsigned long long)osb->root_blkno,
2305 (unsigned long long)osb->system_dir_blkno,
2306 osb->s_clustersize_bits);
2307
2308 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2309 if (!osb->osb_dlm_debug) {
2310 status = -ENOMEM;
2311 mlog_errno(status);
2312 goto bail;
2313 }
2314
2315 atomic_set(&osb->vol_state, VOLUME_INIT);
2316
2317 /* load root, system_dir, and all global system inodes */
2318 status = ocfs2_init_global_system_inodes(osb);
2319 if (status < 0) {
2320 mlog_errno(status);
2321 goto bail;
2322 }
2323
2324 /*
2325 * global bitmap
2326 */
2327 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2328 OCFS2_INVALID_SLOT);
2329 if (!inode) {
2330 status = -EINVAL;
2331 mlog_errno(status);
2332 goto bail;
2333 }
2334
2335 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2336 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2337 iput(inode);
2338
2339 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2340 osb->s_feature_incompat) * 8;
2341
2342 status = ocfs2_init_slot_info(osb);
2343 if (status < 0) {
2344 mlog_errno(status);
2345 goto bail;
2346 }
2347 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb);
2348
2349 bail:
2350 return status;
2351 }
2352
2353 /*
2354 * will return: -EAGAIN if it is ok to keep searching for superblocks
2355 * -EINVAL if there is a bad superblock
2356 * 0 on success
2357 */
2358 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2359 struct buffer_head *bh,
2360 u32 blksz,
2361 struct ocfs2_blockcheck_stats *stats)
2362 {
2363 int status = -EAGAIN;
2364
2365 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2366 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2367 /* We have to do a raw check of the feature here */
2368 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2369 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2370 status = ocfs2_block_check_validate(bh->b_data,
2371 bh->b_size,
2372 &di->i_check,
2373 stats);
2374 if (status)
2375 goto out;
2376 }
2377 status = -EINVAL;
2378 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2379 mlog(ML_ERROR, "found superblock with incorrect block "
2380 "size: found %u, should be %u\n",
2381 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2382 blksz);
2383 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2384 OCFS2_MAJOR_REV_LEVEL ||
2385 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2386 OCFS2_MINOR_REV_LEVEL) {
2387 mlog(ML_ERROR, "found superblock with bad version: "
2388 "found %u.%u, should be %u.%u\n",
2389 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2390 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2391 OCFS2_MAJOR_REV_LEVEL,
2392 OCFS2_MINOR_REV_LEVEL);
2393 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2394 mlog(ML_ERROR, "bad block number on superblock: "
2395 "found %llu, should be %llu\n",
2396 (unsigned long long)le64_to_cpu(di->i_blkno),
2397 (unsigned long long)bh->b_blocknr);
2398 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2399 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2400 mlog(ML_ERROR, "bad cluster size found: %u\n",
2401 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2402 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2403 mlog(ML_ERROR, "bad root_blkno: 0\n");
2404 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2405 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2406 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2407 mlog(ML_ERROR,
2408 "Superblock slots found greater than file system "
2409 "maximum: found %u, max %u\n",
2410 le16_to_cpu(di->id2.i_super.s_max_slots),
2411 OCFS2_MAX_SLOTS);
2412 } else {
2413 /* found it! */
2414 status = 0;
2415 }
2416 }
2417
2418 out:
2419 if (status && status != -EAGAIN)
2420 mlog_errno(status);
2421 return status;
2422 }
2423
2424 static int ocfs2_check_volume(struct ocfs2_super *osb)
2425 {
2426 int status;
2427 int dirty;
2428 int local;
2429 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2430 * recover
2431 * ourselves. */
2432
2433 /* Init our journal object. */
2434 status = ocfs2_journal_init(osb->journal, &dirty);
2435 if (status < 0) {
2436 mlog(ML_ERROR, "Could not initialize journal!\n");
2437 goto finally;
2438 }
2439
2440 /* Now that journal has been initialized, check to make sure
2441 entire volume is addressable. */
2442 status = ocfs2_journal_addressable(osb);
2443 if (status)
2444 goto finally;
2445
2446 /* If the journal was unmounted cleanly then we don't want to
2447 * recover anything. Otherwise, journal_load will do that
2448 * dirty work for us :) */
2449 if (!dirty) {
2450 status = ocfs2_journal_wipe(osb->journal, 0);
2451 if (status < 0) {
2452 mlog_errno(status);
2453 goto finally;
2454 }
2455 } else {
2456 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2457 "unmounted cleanly, recovering it.\n", osb->dev_str);
2458 }
2459
2460 local = ocfs2_mount_local(osb);
2461
2462 /* will play back anything left in the journal. */
2463 status = ocfs2_journal_load(osb->journal, local, dirty);
2464 if (status < 0) {
2465 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2466 goto finally;
2467 }
2468
2469 if (dirty) {
2470 /* recover my local alloc if we didn't unmount cleanly. */
2471 status = ocfs2_begin_local_alloc_recovery(osb,
2472 osb->slot_num,
2473 &local_alloc);
2474 if (status < 0) {
2475 mlog_errno(status);
2476 goto finally;
2477 }
2478 /* we complete the recovery process after we've marked
2479 * ourselves as mounted. */
2480 }
2481
2482 status = ocfs2_load_local_alloc(osb);
2483 if (status < 0) {
2484 mlog_errno(status);
2485 goto finally;
2486 }
2487
2488 if (dirty) {
2489 /* Recovery will be completed after we've mounted the
2490 * rest of the volume. */
2491 osb->dirty = 1;
2492 osb->local_alloc_copy = local_alloc;
2493 local_alloc = NULL;
2494 }
2495
2496 /* go through each journal, trylock it and if you get the
2497 * lock, and it's marked as dirty, set the bit in the recover
2498 * map and launch a recovery thread for it. */
2499 status = ocfs2_mark_dead_nodes(osb);
2500 if (status < 0) {
2501 mlog_errno(status);
2502 goto finally;
2503 }
2504
2505 status = ocfs2_compute_replay_slots(osb);
2506 if (status < 0)
2507 mlog_errno(status);
2508
2509 finally:
2510 kfree(local_alloc);
2511
2512 if (status)
2513 mlog_errno(status);
2514 return status;
2515 }
2516
2517 /*
2518 * The routine gets called from dismount or close whenever a dismount on
2519 * volume is requested and the osb open count becomes 1.
2520 * It will remove the osb from the global list and also free up all the
2521 * initialized resources and fileobject.
2522 */
2523 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2524 {
2525 /* This function assumes that the caller has the main osb resource */
2526
2527 ocfs2_free_slot_info(osb);
2528
2529 kfree(osb->osb_orphan_wipes);
2530 kfree(osb->slot_recovery_generations);
2531 /* FIXME
2532 * This belongs in journal shutdown, but because we have to
2533 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2534 * we free it here.
2535 */
2536 kfree(osb->journal);
2537 kfree(osb->local_alloc_copy);
2538 kfree(osb->uuid_str);
2539 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2540 memset(osb, 0, sizeof(struct ocfs2_super));
2541 }
2542
2543 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2544 * panic(). We do not support continue-on-error operation. */
2545 static void ocfs2_handle_error(struct super_block *sb)
2546 {
2547 struct ocfs2_super *osb = OCFS2_SB(sb);
2548
2549 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2550 panic("OCFS2: (device %s): panic forced after error\n",
2551 sb->s_id);
2552
2553 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2554
2555 if (sb->s_flags & MS_RDONLY &&
2556 (ocfs2_is_soft_readonly(osb) ||
2557 ocfs2_is_hard_readonly(osb)))
2558 return;
2559
2560 printk(KERN_CRIT "File system is now read-only due to the potential "
2561 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2562 "system is unmounted.\n");
2563 sb->s_flags |= MS_RDONLY;
2564 ocfs2_set_ro_flag(osb, 0);
2565 }
2566
2567 static char error_buf[1024];
2568
2569 void __ocfs2_error(struct super_block *sb,
2570 const char *function,
2571 const char *fmt, ...)
2572 {
2573 va_list args;
2574
2575 va_start(args, fmt);
2576 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2577 va_end(args);
2578
2579 /* Not using mlog here because we want to show the actual
2580 * function the error came from. */
2581 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2582 sb->s_id, function, error_buf);
2583
2584 ocfs2_handle_error(sb);
2585 }
2586
2587 /* Handle critical errors. This is intentionally more drastic than
2588 * ocfs2_handle_error, so we only use for things like journal errors,
2589 * etc. */
2590 void __ocfs2_abort(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 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2601 sb->s_id, function, error_buf);
2602
2603 /* We don't have the cluster support yet to go straight to
2604 * hard readonly in here. Until then, we want to keep
2605 * ocfs2_abort() so that we can at least mark critical
2606 * errors.
2607 *
2608 * TODO: This should abort the journal and alert other nodes
2609 * that our slot needs recovery. */
2610
2611 /* Force a panic(). This stinks, but it's better than letting
2612 * things continue without having a proper hard readonly
2613 * here. */
2614 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2615 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2616 ocfs2_handle_error(sb);
2617 }
2618
2619 /*
2620 * Void signal blockers, because in-kernel sigprocmask() only fails
2621 * when SIG_* is wrong.
2622 */
2623 void ocfs2_block_signals(sigset_t *oldset)
2624 {
2625 int rc;
2626 sigset_t blocked;
2627
2628 sigfillset(&blocked);
2629 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2630 BUG_ON(rc);
2631 }
2632
2633 void ocfs2_unblock_signals(sigset_t *oldset)
2634 {
2635 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2636 BUG_ON(rc);
2637 }
2638
2639 module_init(ocfs2_init);
2640 module_exit(ocfs2_exit);
Linux kernel - Deliverables
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