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Staging: comedi: fix brace and printk coding style issue in serial2002.c
[linux-2.6/next.git] / fs / ocfs2 / super.c
blob56f61027236b696fce1ccde3e1edaf86acee59a0
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 "blockcheck.h"
58 #include "dlmglue.h"
59 #include "export.h"
60 #include "extent_map.h"
61 #include "heartbeat.h"
62 #include "inode.h"
63 #include "journal.h"
64 #include "localalloc.h"
65 #include "namei.h"
66 #include "slot_map.h"
67 #include "super.h"
68 #include "sysfile.h"
69 #include "uptodate.h"
70 #include "ver.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
93 struct mount_options
94 {
95 unsigned long commit_interval;
96 unsigned long mount_opt;
97 unsigned int atime_quantum;
98 signed short slot;
99 int localalloc_opt;
100 unsigned int resv_level;
101 int dir_resv_level;
102 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
103 };
104
105 static int ocfs2_parse_options(struct super_block *sb, char *options,
106 struct mount_options *mopt,
107 int is_remount);
108 static int ocfs2_check_set_options(struct super_block *sb,
109 struct mount_options *options);
110 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
111 static void ocfs2_put_super(struct super_block *sb);
112 static int ocfs2_mount_volume(struct super_block *sb);
113 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
114 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
115 static int ocfs2_initialize_mem_caches(void);
116 static void ocfs2_free_mem_caches(void);
117 static void ocfs2_delete_osb(struct ocfs2_super *osb);
118
119 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
120
121 static int ocfs2_sync_fs(struct super_block *sb, int wait);
122
123 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
124 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
125 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
126 static int ocfs2_check_volume(struct ocfs2_super *osb);
127 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
128 struct buffer_head *bh,
129 u32 sectsize,
130 struct ocfs2_blockcheck_stats *stats);
131 static int ocfs2_initialize_super(struct super_block *sb,
132 struct buffer_head *bh,
133 int sector_size,
134 struct ocfs2_blockcheck_stats *stats);
135 static int ocfs2_get_sector(struct super_block *sb,
136 struct buffer_head **bh,
137 int block,
138 int sect_size);
139 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
140 static void ocfs2_destroy_inode(struct inode *inode);
141 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
142 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
143 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
144
145 static const struct super_operations ocfs2_sops = {
146 .statfs = ocfs2_statfs,
147 .alloc_inode = ocfs2_alloc_inode,
148 .destroy_inode = ocfs2_destroy_inode,
149 .drop_inode = ocfs2_drop_inode,
150 .evict_inode = ocfs2_evict_inode,
151 .sync_fs = ocfs2_sync_fs,
152 .put_super = ocfs2_put_super,
153 .remount_fs = ocfs2_remount,
154 .show_options = ocfs2_show_options,
155 .quota_read = ocfs2_quota_read,
156 .quota_write = ocfs2_quota_write,
157 };
158
159 enum {
160 Opt_barrier,
161 Opt_err_panic,
162 Opt_err_ro,
163 Opt_intr,
164 Opt_nointr,
165 Opt_hb_none,
166 Opt_hb_local,
167 Opt_hb_global,
168 Opt_data_ordered,
169 Opt_data_writeback,
170 Opt_atime_quantum,
171 Opt_slot,
172 Opt_commit,
173 Opt_localalloc,
174 Opt_localflocks,
175 Opt_stack,
176 Opt_user_xattr,
177 Opt_nouser_xattr,
178 Opt_inode64,
179 Opt_acl,
180 Opt_noacl,
181 Opt_usrquota,
182 Opt_grpquota,
183 Opt_coherency_buffered,
184 Opt_coherency_full,
185 Opt_resv_level,
186 Opt_dir_resv_level,
187 Opt_err,
188 };
189
190 static const match_table_t tokens = {
191 {Opt_barrier, "barrier=%u"},
192 {Opt_err_panic, "errors=panic"},
193 {Opt_err_ro, "errors=remount-ro"},
194 {Opt_intr, "intr"},
195 {Opt_nointr, "nointr"},
196 {Opt_hb_none, OCFS2_HB_NONE},
197 {Opt_hb_local, OCFS2_HB_LOCAL},
198 {Opt_hb_global, OCFS2_HB_GLOBAL},
199 {Opt_data_ordered, "data=ordered"},
200 {Opt_data_writeback, "data=writeback"},
201 {Opt_atime_quantum, "atime_quantum=%u"},
202 {Opt_slot, "preferred_slot=%u"},
203 {Opt_commit, "commit=%u"},
204 {Opt_localalloc, "localalloc=%d"},
205 {Opt_localflocks, "localflocks"},
206 {Opt_stack, "cluster_stack=%s"},
207 {Opt_user_xattr, "user_xattr"},
208 {Opt_nouser_xattr, "nouser_xattr"},
209 {Opt_inode64, "inode64"},
210 {Opt_acl, "acl"},
211 {Opt_noacl, "noacl"},
212 {Opt_usrquota, "usrquota"},
213 {Opt_grpquota, "grpquota"},
214 {Opt_coherency_buffered, "coherency=buffered"},
215 {Opt_coherency_full, "coherency=full"},
216 {Opt_resv_level, "resv_level=%u"},
217 {Opt_dir_resv_level, "dir_resv_level=%u"},
218 {Opt_err, NULL}
219 };
220
221 #ifdef CONFIG_DEBUG_FS
222 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
223 {
224 struct ocfs2_cluster_connection *cconn = osb->cconn;
225 struct ocfs2_recovery_map *rm = osb->recovery_map;
226 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
227 int i, out = 0;
228
229 out += snprintf(buf + out, len - out,
230 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
231 "Device", osb->dev_str, osb->uuid_str,
232 osb->fs_generation, osb->vol_label);
233
234 out += snprintf(buf + out, len - out,
235 "%10s => State: %d Flags: 0x%lX\n", "Volume",
236 atomic_read(&osb->vol_state), osb->osb_flags);
237
238 out += snprintf(buf + out, len - out,
239 "%10s => Block: %lu Cluster: %d\n", "Sizes",
240 osb->sb->s_blocksize, osb->s_clustersize);
241
242 out += snprintf(buf + out, len - out,
243 "%10s => Compat: 0x%X Incompat: 0x%X "
244 "ROcompat: 0x%X\n",
245 "Features", osb->s_feature_compat,
246 osb->s_feature_incompat, osb->s_feature_ro_compat);
247
248 out += snprintf(buf + out, len - out,
249 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
250 osb->s_mount_opt, osb->s_atime_quantum);
251
252 if (cconn) {
253 out += snprintf(buf + out, len - out,
254 "%10s => Stack: %s Name: %*s "
255 "Version: %d.%d\n", "Cluster",
256 (*osb->osb_cluster_stack == '\0' ?
257 "o2cb" : osb->osb_cluster_stack),
258 cconn->cc_namelen, cconn->cc_name,
259 cconn->cc_version.pv_major,
260 cconn->cc_version.pv_minor);
261 }
262
263 spin_lock(&osb->dc_task_lock);
264 out += snprintf(buf + out, len - out,
265 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
266 "WorkSeq: %lu\n", "DownCnvt",
267 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
268 osb->blocked_lock_count, osb->dc_wake_sequence,
269 osb->dc_work_sequence);
270 spin_unlock(&osb->dc_task_lock);
271
272 spin_lock(&osb->osb_lock);
273 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
274 "Recovery",
275 (osb->recovery_thread_task ?
276 task_pid_nr(osb->recovery_thread_task) : -1));
277 if (rm->rm_used == 0)
278 out += snprintf(buf + out, len - out, " None\n");
279 else {
280 for (i = 0; i < rm->rm_used; i++)
281 out += snprintf(buf + out, len - out, " %d",
282 rm->rm_entries[i]);
283 out += snprintf(buf + out, len - out, "\n");
284 }
285 spin_unlock(&osb->osb_lock);
286
287 out += snprintf(buf + out, len - out,
288 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
289 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
290 osb->osb_commit_interval,
291 atomic_read(&osb->needs_checkpoint));
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 INIT_LIST_HEAD(&inode->i_dentry);
572 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
573 }
574
575 static void ocfs2_destroy_inode(struct inode *inode)
576 {
577 call_rcu(&inode->i_rcu, ocfs2_i_callback);
578 }
579
580 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
581 unsigned int cbits)
582 {
583 unsigned int bytes = 1 << cbits;
584 unsigned int trim = bytes;
585 unsigned int bitshift = 32;
586
587 /*
588 * i_size and all block offsets in ocfs2 are always 64 bits
589 * wide. i_clusters is 32 bits, in cluster-sized units. So on
590 * 64 bit platforms, cluster size will be the limiting factor.
591 */
592
593 #if BITS_PER_LONG == 32
594 # if defined(CONFIG_LBDAF)
595 BUILD_BUG_ON(sizeof(sector_t) != 8);
596 /*
597 * We might be limited by page cache size.
598 */
599 if (bytes > PAGE_CACHE_SIZE) {
600 bytes = PAGE_CACHE_SIZE;
601 trim = 1;
602 /*
603 * Shift by 31 here so that we don't get larger than
604 * MAX_LFS_FILESIZE
605 */
606 bitshift = 31;
607 }
608 # else
609 /*
610 * We are limited by the size of sector_t. Use block size, as
611 * that's what we expose to the VFS.
612 */
613 bytes = 1 << bbits;
614 trim = 1;
615 bitshift = 31;
616 # endif
617 #endif
618
619 /*
620 * Trim by a whole cluster when we can actually approach the
621 * on-disk limits. Otherwise we can overflow i_clusters when
622 * an extent start is at the max offset.
623 */
624 return (((unsigned long long)bytes) << bitshift) - trim;
625 }
626
627 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
628 {
629 int incompat_features;
630 int ret = 0;
631 struct mount_options parsed_options;
632 struct ocfs2_super *osb = OCFS2_SB(sb);
633 u32 tmp;
634
635 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
636 !ocfs2_check_set_options(sb, &parsed_options)) {
637 ret = -EINVAL;
638 goto out;
639 }
640
641 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
642 OCFS2_MOUNT_HB_NONE;
643 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
644 ret = -EINVAL;
645 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
646 goto out;
647 }
648
649 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
650 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
651 ret = -EINVAL;
652 mlog(ML_ERROR, "Cannot change data mode on remount\n");
653 goto out;
654 }
655
656 /* Probably don't want this on remount; it might
657 * mess with other nodes */
658 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
659 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
660 ret = -EINVAL;
661 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
662 goto out;
663 }
664
665 /* We're going to/from readonly mode. */
666 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
667 /* Disable quota accounting before remounting RO */
668 if (*flags & MS_RDONLY) {
669 ret = ocfs2_susp_quotas(osb, 0);
670 if (ret < 0)
671 goto out;
672 }
673 /* Lock here so the check of HARD_RO and the potential
674 * setting of SOFT_RO is atomic. */
675 spin_lock(&osb->osb_lock);
676 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
677 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
678 ret = -EROFS;
679 goto unlock_osb;
680 }
681
682 if (*flags & MS_RDONLY) {
683 sb->s_flags |= MS_RDONLY;
684 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
685 } else {
686 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
687 mlog(ML_ERROR, "Cannot remount RDWR "
688 "filesystem due to previous errors.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
693 if (incompat_features) {
694 mlog(ML_ERROR, "Cannot remount RDWR because "
695 "of unsupported optional features "
696 "(%x).\n", incompat_features);
697 ret = -EINVAL;
698 goto unlock_osb;
699 }
700 sb->s_flags &= ~MS_RDONLY;
701 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
702 }
703 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
704 unlock_osb:
705 spin_unlock(&osb->osb_lock);
706 /* Enable quota accounting after remounting RW */
707 if (!ret && !(*flags & MS_RDONLY)) {
708 if (sb_any_quota_suspended(sb))
709 ret = ocfs2_susp_quotas(osb, 1);
710 else
711 ret = ocfs2_enable_quotas(osb);
712 if (ret < 0) {
713 /* Return back changes... */
714 spin_lock(&osb->osb_lock);
715 sb->s_flags |= MS_RDONLY;
716 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
717 spin_unlock(&osb->osb_lock);
718 goto out;
719 }
720 }
721 }
722
723 if (!ret) {
724 /* Only save off the new mount options in case of a successful
725 * remount. */
726 osb->s_mount_opt = parsed_options.mount_opt;
727 osb->s_atime_quantum = parsed_options.atime_quantum;
728 osb->preferred_slot = parsed_options.slot;
729 if (parsed_options.commit_interval)
730 osb->osb_commit_interval = parsed_options.commit_interval;
731
732 if (!ocfs2_is_hard_readonly(osb))
733 ocfs2_set_journal_params(osb);
734
735 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
736 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
737 MS_POSIXACL : 0);
738 }
739 out:
740 return ret;
741 }
742
743 static int ocfs2_sb_probe(struct super_block *sb,
744 struct buffer_head **bh,
745 int *sector_size,
746 struct ocfs2_blockcheck_stats *stats)
747 {
748 int status, tmpstat;
749 struct ocfs1_vol_disk_hdr *hdr;
750 struct ocfs2_dinode *di;
751 int blksize;
752
753 *bh = NULL;
754
755 /* may be > 512 */
756 *sector_size = bdev_logical_block_size(sb->s_bdev);
757 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
758 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
759 *sector_size, OCFS2_MAX_BLOCKSIZE);
760 status = -EINVAL;
761 goto bail;
762 }
763
764 /* Can this really happen? */
765 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
766 *sector_size = OCFS2_MIN_BLOCKSIZE;
767
768 /* check block zero for old format */
769 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
770 if (status < 0) {
771 mlog_errno(status);
772 goto bail;
773 }
774 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
775 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
776 mlog(ML_ERROR, "incompatible version: %u.%u\n",
777 hdr->major_version, hdr->minor_version);
778 status = -EINVAL;
779 }
780 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
781 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
782 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
783 hdr->signature);
784 status = -EINVAL;
785 }
786 brelse(*bh);
787 *bh = NULL;
788 if (status < 0) {
789 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
790 "upgraded before mounting with ocfs v2\n");
791 goto bail;
792 }
793
794 /*
795 * Now check at magic offset for 512, 1024, 2048, 4096
796 * blocksizes. 4096 is the maximum blocksize because it is
797 * the minimum clustersize.
798 */
799 status = -EINVAL;
800 for (blksize = *sector_size;
801 blksize <= OCFS2_MAX_BLOCKSIZE;
802 blksize <<= 1) {
803 tmpstat = ocfs2_get_sector(sb, bh,
804 OCFS2_SUPER_BLOCK_BLKNO,
805 blksize);
806 if (tmpstat < 0) {
807 status = tmpstat;
808 mlog_errno(status);
809 break;
810 }
811 di = (struct ocfs2_dinode *) (*bh)->b_data;
812 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
813 spin_lock_init(&stats->b_lock);
814 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
815 if (tmpstat < 0) {
816 brelse(*bh);
817 *bh = NULL;
818 }
819 if (tmpstat != -EAGAIN) {
820 status = tmpstat;
821 break;
822 }
823 }
824
825 bail:
826 return status;
827 }
828
829 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
830 {
831 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
832
833 if (osb->s_mount_opt & hb_enabled) {
834 if (ocfs2_mount_local(osb)) {
835 mlog(ML_ERROR, "Cannot heartbeat on a locally "
836 "mounted device.\n");
837 return -EINVAL;
838 }
839 if (ocfs2_userspace_stack(osb)) {
840 mlog(ML_ERROR, "Userspace stack expected, but "
841 "o2cb heartbeat arguments passed to mount\n");
842 return -EINVAL;
843 }
844 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
845 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
846 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
847 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
848 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
849 return -EINVAL;
850 }
851 }
852
853 if (!(osb->s_mount_opt & hb_enabled)) {
854 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
855 !ocfs2_userspace_stack(osb)) {
856 mlog(ML_ERROR, "Heartbeat has to be started to mount "
857 "a read-write clustered device.\n");
858 return -EINVAL;
859 }
860 }
861
862 return 0;
863 }
864
865 /*
866 * If we're using a userspace stack, mount should have passed
867 * a name that matches the disk. If not, mount should not
868 * have passed a stack.
869 */
870 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
871 struct mount_options *mopt)
872 {
873 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
874 mlog(ML_ERROR,
875 "cluster stack passed to mount, but this filesystem "
876 "does not support it\n");
877 return -EINVAL;
878 }
879
880 if (ocfs2_userspace_stack(osb) &&
881 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
882 OCFS2_STACK_LABEL_LEN)) {
883 mlog(ML_ERROR,
884 "cluster stack passed to mount (\"%s\") does not "
885 "match the filesystem (\"%s\")\n",
886 mopt->cluster_stack,
887 osb->osb_cluster_stack);
888 return -EINVAL;
889 }
890
891 return 0;
892 }
893
894 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
895 {
896 int type;
897 struct super_block *sb = osb->sb;
898 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
899 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
900 int status = 0;
901
902 for (type = 0; type < MAXQUOTAS; type++) {
903 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
904 continue;
905 if (unsuspend)
906 status = dquot_resume(sb, type);
907 else {
908 struct ocfs2_mem_dqinfo *oinfo;
909
910 /* Cancel periodic syncing before suspending */
911 oinfo = sb_dqinfo(sb, type)->dqi_priv;
912 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
913 status = dquot_suspend(sb, type);
914 }
915 if (status < 0)
916 break;
917 }
918 if (status < 0)
919 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
920 "remount (error = %d).\n", status);
921 return status;
922 }
923
924 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
925 {
926 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
927 struct super_block *sb = osb->sb;
928 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
929 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
930 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
931 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
932 int status;
933 int type;
934
935 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
936 for (type = 0; type < MAXQUOTAS; type++) {
937 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
938 continue;
939 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
940 osb->slot_num);
941 if (!inode[type]) {
942 status = -ENOENT;
943 goto out_quota_off;
944 }
945 status = dquot_enable(inode[type], type, QFMT_OCFS2,
946 DQUOT_USAGE_ENABLED);
947 if (status < 0)
948 goto out_quota_off;
949 }
950
951 for (type = 0; type < MAXQUOTAS; type++)
952 iput(inode[type]);
953 return 0;
954 out_quota_off:
955 ocfs2_disable_quotas(osb);
956 for (type = 0; type < MAXQUOTAS; type++)
957 iput(inode[type]);
958 mlog_errno(status);
959 return status;
960 }
961
962 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
963 {
964 int type;
965 struct inode *inode;
966 struct super_block *sb = osb->sb;
967 struct ocfs2_mem_dqinfo *oinfo;
968
969 /* We mostly ignore errors in this function because there's not much
970 * we can do when we see them */
971 for (type = 0; type < MAXQUOTAS; type++) {
972 if (!sb_has_quota_loaded(sb, type))
973 continue;
974 /* Cancel periodic syncing before we grab dqonoff_mutex */
975 oinfo = sb_dqinfo(sb, type)->dqi_priv;
976 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
977 inode = igrab(sb->s_dquot.files[type]);
978 /* Turn off quotas. This will remove all dquot structures from
979 * memory and so they will be automatically synced to global
980 * quota files */
981 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
982 DQUOT_LIMITS_ENABLED);
983 if (!inode)
984 continue;
985 iput(inode);
986 }
987 }
988
989 /* Handle quota on quotactl */
990 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
991 {
992 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
993 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
994
995 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
996 return -EINVAL;
997
998 return dquot_enable(sb_dqopt(sb)->files[type], type,
999 format_id, DQUOT_LIMITS_ENABLED);
1000 }
1001
1002 /* Handle quota off quotactl */
1003 static int ocfs2_quota_off(struct super_block *sb, int type)
1004 {
1005 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1006 }
1007
1008 static const struct quotactl_ops ocfs2_quotactl_ops = {
1009 .quota_on_meta = ocfs2_quota_on,
1010 .quota_off = ocfs2_quota_off,
1011 .quota_sync = dquot_quota_sync,
1012 .get_info = dquot_get_dqinfo,
1013 .set_info = dquot_set_dqinfo,
1014 .get_dqblk = dquot_get_dqblk,
1015 .set_dqblk = dquot_set_dqblk,
1016 };
1017
1018 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1019 {
1020 struct dentry *root;
1021 int status, sector_size;
1022 struct mount_options parsed_options;
1023 struct inode *inode = NULL;
1024 struct ocfs2_super *osb = NULL;
1025 struct buffer_head *bh = NULL;
1026 char nodestr[8];
1027 struct ocfs2_blockcheck_stats stats;
1028
1029 trace_ocfs2_fill_super(sb, data, silent);
1030
1031 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1032 status = -EINVAL;
1033 goto read_super_error;
1034 }
1035
1036 /* probe for superblock */
1037 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1038 if (status < 0) {
1039 mlog(ML_ERROR, "superblock probe failed!\n");
1040 goto read_super_error;
1041 }
1042
1043 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1044 osb = OCFS2_SB(sb);
1045 if (status < 0) {
1046 mlog_errno(status);
1047 goto read_super_error;
1048 }
1049 brelse(bh);
1050 bh = NULL;
1051
1052 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1053 status = -EINVAL;
1054 goto read_super_error;
1055 }
1056 osb->s_mount_opt = parsed_options.mount_opt;
1057 osb->s_atime_quantum = parsed_options.atime_quantum;
1058 osb->preferred_slot = parsed_options.slot;
1059 osb->osb_commit_interval = parsed_options.commit_interval;
1060
1061 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1062 osb->osb_resv_level = parsed_options.resv_level;
1063 osb->osb_dir_resv_level = parsed_options.resv_level;
1064 if (parsed_options.dir_resv_level == -1)
1065 osb->osb_dir_resv_level = parsed_options.resv_level;
1066 else
1067 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1068
1069 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1070 if (status)
1071 goto read_super_error;
1072
1073 sb->s_magic = OCFS2_SUPER_MAGIC;
1074
1075 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1076 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1077
1078 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1079 * heartbeat=none */
1080 if (bdev_read_only(sb->s_bdev)) {
1081 if (!(sb->s_flags & MS_RDONLY)) {
1082 status = -EACCES;
1083 mlog(ML_ERROR, "Readonly device detected but readonly "
1084 "mount was not specified.\n");
1085 goto read_super_error;
1086 }
1087
1088 /* You should not be able to start a local heartbeat
1089 * on a readonly device. */
1090 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1091 status = -EROFS;
1092 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1093 "device.\n");
1094 goto read_super_error;
1095 }
1096
1097 status = ocfs2_check_journals_nolocks(osb);
1098 if (status < 0) {
1099 if (status == -EROFS)
1100 mlog(ML_ERROR, "Recovery required on readonly "
1101 "file system, but write access is "
1102 "unavailable.\n");
1103 else
1104 mlog_errno(status);
1105 goto read_super_error;
1106 }
1107
1108 ocfs2_set_ro_flag(osb, 1);
1109
1110 printk(KERN_NOTICE "Readonly device detected. No cluster "
1111 "services will be utilized for this mount. Recovery "
1112 "will be skipped.\n");
1113 }
1114
1115 if (!ocfs2_is_hard_readonly(osb)) {
1116 if (sb->s_flags & MS_RDONLY)
1117 ocfs2_set_ro_flag(osb, 0);
1118 }
1119
1120 status = ocfs2_verify_heartbeat(osb);
1121 if (status < 0) {
1122 mlog_errno(status);
1123 goto read_super_error;
1124 }
1125
1126 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1127 ocfs2_debugfs_root);
1128 if (!osb->osb_debug_root) {
1129 status = -EINVAL;
1130 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1131 goto read_super_error;
1132 }
1133
1134 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1135 osb->osb_debug_root,
1136 osb,
1137 &ocfs2_osb_debug_fops);
1138 if (!osb->osb_ctxt) {
1139 status = -EINVAL;
1140 mlog_errno(status);
1141 goto read_super_error;
1142 }
1143
1144 if (ocfs2_meta_ecc(osb)) {
1145 status = ocfs2_blockcheck_stats_debugfs_install(
1146 &osb->osb_ecc_stats,
1147 osb->osb_debug_root);
1148 if (status) {
1149 mlog(ML_ERROR,
1150 "Unable to create blockcheck statistics "
1151 "files\n");
1152 goto read_super_error;
1153 }
1154 }
1155
1156 status = ocfs2_mount_volume(sb);
1157 if (osb->root_inode)
1158 inode = igrab(osb->root_inode);
1159
1160 if (status < 0)
1161 goto read_super_error;
1162
1163 if (!inode) {
1164 status = -EIO;
1165 mlog_errno(status);
1166 goto read_super_error;
1167 }
1168
1169 root = d_alloc_root(inode);
1170 if (!root) {
1171 status = -ENOMEM;
1172 mlog_errno(status);
1173 goto read_super_error;
1174 }
1175
1176 sb->s_root = root;
1177
1178 ocfs2_complete_mount_recovery(osb);
1179
1180 if (ocfs2_mount_local(osb))
1181 snprintf(nodestr, sizeof(nodestr), "local");
1182 else
1183 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1184
1185 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1186 "with %s data mode.\n",
1187 osb->dev_str, nodestr, osb->slot_num,
1188 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1189 "ordered");
1190
1191 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1192 wake_up(&osb->osb_mount_event);
1193
1194 /* Now we can initialize quotas because we can afford to wait
1195 * for cluster locks recovery now. That also means that truncation
1196 * log recovery can happen but that waits for proper quota setup */
1197 if (!(sb->s_flags & MS_RDONLY)) {
1198 status = ocfs2_enable_quotas(osb);
1199 if (status < 0) {
1200 /* We have to err-out specially here because
1201 * s_root is already set */
1202 mlog_errno(status);
1203 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1204 wake_up(&osb->osb_mount_event);
1205 return status;
1206 }
1207 }
1208
1209 ocfs2_complete_quota_recovery(osb);
1210
1211 /* Now we wake up again for processes waiting for quotas */
1212 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1213 wake_up(&osb->osb_mount_event);
1214
1215 /* Start this when the mount is almost sure of being successful */
1216 ocfs2_orphan_scan_start(osb);
1217
1218 return status;
1219
1220 read_super_error:
1221 brelse(bh);
1222
1223 if (inode)
1224 iput(inode);
1225
1226 if (osb) {
1227 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1228 wake_up(&osb->osb_mount_event);
1229 ocfs2_dismount_volume(sb, 1);
1230 }
1231
1232 if (status)
1233 mlog_errno(status);
1234 return status;
1235 }
1236
1237 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1238 int flags,
1239 const char *dev_name,
1240 void *data)
1241 {
1242 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1243 }
1244
1245 static void ocfs2_kill_sb(struct super_block *sb)
1246 {
1247 struct ocfs2_super *osb = OCFS2_SB(sb);
1248
1249 /* Failed mount? */
1250 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1251 goto out;
1252
1253 /* Prevent further queueing of inode drop events */
1254 spin_lock(&dentry_list_lock);
1255 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1256 spin_unlock(&dentry_list_lock);
1257 /* Wait for work to finish and/or remove it */
1258 cancel_work_sync(&osb->dentry_lock_work);
1259 out:
1260 kill_block_super(sb);
1261 }
1262
1263 static struct file_system_type ocfs2_fs_type = {
1264 .owner = THIS_MODULE,
1265 .name = "ocfs2",
1266 .mount = ocfs2_mount,
1267 .kill_sb = ocfs2_kill_sb,
1268
1269 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1270 .next = NULL
1271 };
1272
1273 static int ocfs2_check_set_options(struct super_block *sb,
1274 struct mount_options *options)
1275 {
1276 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1277 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1278 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1279 mlog(ML_ERROR, "User quotas were requested, but this "
1280 "filesystem does not have the feature enabled.\n");
1281 return 0;
1282 }
1283 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1284 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1285 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1286 mlog(ML_ERROR, "Group quotas were requested, but this "
1287 "filesystem does not have the feature enabled.\n");
1288 return 0;
1289 }
1290 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1291 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1292 mlog(ML_ERROR, "ACL support requested but extended attributes "
1293 "feature is not enabled\n");
1294 return 0;
1295 }
1296 /* No ACL setting specified? Use XATTR feature... */
1297 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1298 OCFS2_MOUNT_NO_POSIX_ACL))) {
1299 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1300 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1301 else
1302 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1303 }
1304 return 1;
1305 }
1306
1307 static int ocfs2_parse_options(struct super_block *sb,
1308 char *options,
1309 struct mount_options *mopt,
1310 int is_remount)
1311 {
1312 int status, user_stack = 0;
1313 char *p;
1314 u32 tmp;
1315
1316 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1317
1318 mopt->commit_interval = 0;
1319 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1320 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1321 mopt->slot = OCFS2_INVALID_SLOT;
1322 mopt->localalloc_opt = -1;
1323 mopt->cluster_stack[0] = '\0';
1324 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1325 mopt->dir_resv_level = -1;
1326
1327 if (!options) {
1328 status = 1;
1329 goto bail;
1330 }
1331
1332 while ((p = strsep(&options, ",")) != NULL) {
1333 int token, option;
1334 substring_t args[MAX_OPT_ARGS];
1335
1336 if (!*p)
1337 continue;
1338
1339 token = match_token(p, tokens, args);
1340 switch (token) {
1341 case Opt_hb_local:
1342 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1343 break;
1344 case Opt_hb_none:
1345 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1346 break;
1347 case Opt_hb_global:
1348 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1349 break;
1350 case Opt_barrier:
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option)
1356 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1357 else
1358 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1359 break;
1360 case Opt_intr:
1361 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1362 break;
1363 case Opt_nointr:
1364 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1365 break;
1366 case Opt_err_panic:
1367 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1368 break;
1369 case Opt_err_ro:
1370 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1371 break;
1372 case Opt_data_ordered:
1373 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1374 break;
1375 case Opt_data_writeback:
1376 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1377 break;
1378 case Opt_user_xattr:
1379 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1380 break;
1381 case Opt_nouser_xattr:
1382 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1383 break;
1384 case Opt_atime_quantum:
1385 if (match_int(&args[0], &option)) {
1386 status = 0;
1387 goto bail;
1388 }
1389 if (option >= 0)
1390 mopt->atime_quantum = option;
1391 break;
1392 case Opt_slot:
1393 option = 0;
1394 if (match_int(&args[0], &option)) {
1395 status = 0;
1396 goto bail;
1397 }
1398 if (option)
1399 mopt->slot = (s16)option;
1400 break;
1401 case Opt_commit:
1402 option = 0;
1403 if (match_int(&args[0], &option)) {
1404 status = 0;
1405 goto bail;
1406 }
1407 if (option < 0)
1408 return 0;
1409 if (option == 0)
1410 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1411 mopt->commit_interval = HZ * option;
1412 break;
1413 case Opt_localalloc:
1414 option = 0;
1415 if (match_int(&args[0], &option)) {
1416 status = 0;
1417 goto bail;
1418 }
1419 if (option >= 0)
1420 mopt->localalloc_opt = option;
1421 break;
1422 case Opt_localflocks:
1423 /*
1424 * Changing this during remount could race
1425 * flock() requests, or "unbalance" existing
1426 * ones (e.g., a lock is taken in one mode but
1427 * dropped in the other). If users care enough
1428 * to flip locking modes during remount, we
1429 * could add a "local" flag to individual
1430 * flock structures for proper tracking of
1431 * state.
1432 */
1433 if (!is_remount)
1434 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1435 break;
1436 case Opt_stack:
1437 /* Check both that the option we were passed
1438 * is of the right length and that it is a proper
1439 * string of the right length.
1440 */
1441 if (((args[0].to - args[0].from) !=
1442 OCFS2_STACK_LABEL_LEN) ||
1443 (strnlen(args[0].from,
1444 OCFS2_STACK_LABEL_LEN) !=
1445 OCFS2_STACK_LABEL_LEN)) {
1446 mlog(ML_ERROR,
1447 "Invalid cluster_stack option\n");
1448 status = 0;
1449 goto bail;
1450 }
1451 memcpy(mopt->cluster_stack, args[0].from,
1452 OCFS2_STACK_LABEL_LEN);
1453 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1454 /*
1455 * Open code the memcmp here as we don't have
1456 * an osb to pass to
1457 * ocfs2_userspace_stack().
1458 */
1459 if (memcmp(mopt->cluster_stack,
1460 OCFS2_CLASSIC_CLUSTER_STACK,
1461 OCFS2_STACK_LABEL_LEN))
1462 user_stack = 1;
1463 break;
1464 case Opt_inode64:
1465 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1466 break;
1467 case Opt_usrquota:
1468 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1469 break;
1470 case Opt_grpquota:
1471 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1472 break;
1473 case Opt_coherency_buffered:
1474 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1475 break;
1476 case Opt_coherency_full:
1477 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1478 break;
1479 case Opt_acl:
1480 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1481 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1482 break;
1483 case Opt_noacl:
1484 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1485 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1486 break;
1487 case Opt_resv_level:
1488 if (is_remount)
1489 break;
1490 if (match_int(&args[0], &option)) {
1491 status = 0;
1492 goto bail;
1493 }
1494 if (option >= OCFS2_MIN_RESV_LEVEL &&
1495 option < OCFS2_MAX_RESV_LEVEL)
1496 mopt->resv_level = option;
1497 break;
1498 case Opt_dir_resv_level:
1499 if (is_remount)
1500 break;
1501 if (match_int(&args[0], &option)) {
1502 status = 0;
1503 goto bail;
1504 }
1505 if (option >= OCFS2_MIN_RESV_LEVEL &&
1506 option < OCFS2_MAX_RESV_LEVEL)
1507 mopt->dir_resv_level = option;
1508 break;
1509 default:
1510 mlog(ML_ERROR,
1511 "Unrecognized mount option \"%s\" "
1512 "or missing value\n", p);
1513 status = 0;
1514 goto bail;
1515 }
1516 }
1517
1518 if (user_stack == 0) {
1519 /* Ensure only one heartbeat mode */
1520 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1521 OCFS2_MOUNT_HB_GLOBAL |
1522 OCFS2_MOUNT_HB_NONE);
1523 if (hweight32(tmp) != 1) {
1524 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1525 status = 0;
1526 goto bail;
1527 }
1528 }
1529
1530 status = 1;
1531
1532 bail:
1533 return status;
1534 }
1535
1536 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1537 {
1538 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1539 unsigned long opts = osb->s_mount_opt;
1540 unsigned int local_alloc_megs;
1541
1542 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1543 seq_printf(s, ",_netdev");
1544 if (opts & OCFS2_MOUNT_HB_LOCAL)
1545 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1546 else
1547 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1548 } else
1549 seq_printf(s, ",%s", OCFS2_HB_NONE);
1550
1551 if (opts & OCFS2_MOUNT_NOINTR)
1552 seq_printf(s, ",nointr");
1553
1554 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1555 seq_printf(s, ",data=writeback");
1556 else
1557 seq_printf(s, ",data=ordered");
1558
1559 if (opts & OCFS2_MOUNT_BARRIER)
1560 seq_printf(s, ",barrier=1");
1561
1562 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1563 seq_printf(s, ",errors=panic");
1564 else
1565 seq_printf(s, ",errors=remount-ro");
1566
1567 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1568 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1569
1570 if (!(mnt->mnt_flags & MNT_NOATIME) && !(mnt->mnt_flags & MNT_RELATIME))
1571 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1572
1573 if (osb->osb_commit_interval)
1574 seq_printf(s, ",commit=%u",
1575 (unsigned) (osb->osb_commit_interval / HZ));
1576
1577 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1578 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1579 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1580
1581 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1582 seq_printf(s, ",localflocks,");
1583
1584 if (osb->osb_cluster_stack[0])
1585 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1586 osb->osb_cluster_stack);
1587 if (opts & OCFS2_MOUNT_USRQUOTA)
1588 seq_printf(s, ",usrquota");
1589 if (opts & OCFS2_MOUNT_GRPQUOTA)
1590 seq_printf(s, ",grpquota");
1591
1592 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1593 seq_printf(s, ",coherency=buffered");
1594 else
1595 seq_printf(s, ",coherency=full");
1596
1597 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1598 seq_printf(s, ",nouser_xattr");
1599 else
1600 seq_printf(s, ",user_xattr");
1601
1602 if (opts & OCFS2_MOUNT_INODE64)
1603 seq_printf(s, ",inode64");
1604
1605 if (opts & OCFS2_MOUNT_POSIX_ACL)
1606 seq_printf(s, ",acl");
1607 else
1608 seq_printf(s, ",noacl");
1609
1610 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1611 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1612
1613 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1614 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1615
1616 return 0;
1617 }
1618
1619 static int __init ocfs2_init(void)
1620 {
1621 int status;
1622
1623 ocfs2_print_version();
1624
1625 status = init_ocfs2_uptodate_cache();
1626 if (status < 0) {
1627 mlog_errno(status);
1628 goto leave;
1629 }
1630
1631 status = ocfs2_initialize_mem_caches();
1632 if (status < 0) {
1633 mlog_errno(status);
1634 goto leave;
1635 }
1636
1637 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1638 if (!ocfs2_wq) {
1639 status = -ENOMEM;
1640 goto leave;
1641 }
1642
1643 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1644 if (!ocfs2_debugfs_root) {
1645 status = -EFAULT;
1646 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1647 }
1648
1649 ocfs2_set_locking_protocol();
1650
1651 status = register_quota_format(&ocfs2_quota_format);
1652 leave:
1653 if (status < 0) {
1654 ocfs2_free_mem_caches();
1655 exit_ocfs2_uptodate_cache();
1656 mlog_errno(status);
1657 }
1658
1659 if (status >= 0) {
1660 return register_filesystem(&ocfs2_fs_type);
1661 } else
1662 return -1;
1663 }
1664
1665 static void __exit ocfs2_exit(void)
1666 {
1667 if (ocfs2_wq) {
1668 flush_workqueue(ocfs2_wq);
1669 destroy_workqueue(ocfs2_wq);
1670 }
1671
1672 unregister_quota_format(&ocfs2_quota_format);
1673
1674 debugfs_remove(ocfs2_debugfs_root);
1675
1676 ocfs2_free_mem_caches();
1677
1678 unregister_filesystem(&ocfs2_fs_type);
1679
1680 exit_ocfs2_uptodate_cache();
1681 }
1682
1683 static void ocfs2_put_super(struct super_block *sb)
1684 {
1685 trace_ocfs2_put_super(sb);
1686
1687 ocfs2_sync_blockdev(sb);
1688 ocfs2_dismount_volume(sb, 0);
1689 }
1690
1691 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1692 {
1693 struct ocfs2_super *osb;
1694 u32 numbits, freebits;
1695 int status;
1696 struct ocfs2_dinode *bm_lock;
1697 struct buffer_head *bh = NULL;
1698 struct inode *inode = NULL;
1699
1700 trace_ocfs2_statfs(dentry->d_sb, buf);
1701
1702 osb = OCFS2_SB(dentry->d_sb);
1703
1704 inode = ocfs2_get_system_file_inode(osb,
1705 GLOBAL_BITMAP_SYSTEM_INODE,
1706 OCFS2_INVALID_SLOT);
1707 if (!inode) {
1708 mlog(ML_ERROR, "failed to get bitmap inode\n");
1709 status = -EIO;
1710 goto bail;
1711 }
1712
1713 status = ocfs2_inode_lock(inode, &bh, 0);
1714 if (status < 0) {
1715 mlog_errno(status);
1716 goto bail;
1717 }
1718
1719 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1720
1721 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1722 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1723
1724 buf->f_type = OCFS2_SUPER_MAGIC;
1725 buf->f_bsize = dentry->d_sb->s_blocksize;
1726 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1727 buf->f_blocks = ((sector_t) numbits) *
1728 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1729 buf->f_bfree = ((sector_t) freebits) *
1730 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1731 buf->f_bavail = buf->f_bfree;
1732 buf->f_files = numbits;
1733 buf->f_ffree = freebits;
1734 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1735 & 0xFFFFFFFFUL;
1736 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1737 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1738
1739 brelse(bh);
1740
1741 ocfs2_inode_unlock(inode, 0);
1742 status = 0;
1743 bail:
1744 if (inode)
1745 iput(inode);
1746
1747 if (status)
1748 mlog_errno(status);
1749
1750 return status;
1751 }
1752
1753 static void ocfs2_inode_init_once(void *data)
1754 {
1755 struct ocfs2_inode_info *oi = data;
1756
1757 oi->ip_flags = 0;
1758 oi->ip_open_count = 0;
1759 spin_lock_init(&oi->ip_lock);
1760 ocfs2_extent_map_init(&oi->vfs_inode);
1761 INIT_LIST_HEAD(&oi->ip_io_markers);
1762 oi->ip_dir_start_lookup = 0;
1763
1764 init_rwsem(&oi->ip_alloc_sem);
1765 init_rwsem(&oi->ip_xattr_sem);
1766 mutex_init(&oi->ip_io_mutex);
1767
1768 oi->ip_blkno = 0ULL;
1769 oi->ip_clusters = 0;
1770
1771 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1772
1773 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1774 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1775 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1776
1777 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1778 &ocfs2_inode_caching_ops);
1779
1780 inode_init_once(&oi->vfs_inode);
1781 }
1782
1783 static int ocfs2_initialize_mem_caches(void)
1784 {
1785 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1786 sizeof(struct ocfs2_inode_info),
1787 0,
1788 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1789 SLAB_MEM_SPREAD),
1790 ocfs2_inode_init_once);
1791 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1792 sizeof(struct ocfs2_dquot),
1793 0,
1794 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1795 SLAB_MEM_SPREAD),
1796 NULL);
1797 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1798 sizeof(struct ocfs2_quota_chunk),
1799 0,
1800 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1801 NULL);
1802 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1803 !ocfs2_qf_chunk_cachep) {
1804 if (ocfs2_inode_cachep)
1805 kmem_cache_destroy(ocfs2_inode_cachep);
1806 if (ocfs2_dquot_cachep)
1807 kmem_cache_destroy(ocfs2_dquot_cachep);
1808 if (ocfs2_qf_chunk_cachep)
1809 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1810 return -ENOMEM;
1811 }
1812
1813 return 0;
1814 }
1815
1816 static void ocfs2_free_mem_caches(void)
1817 {
1818 if (ocfs2_inode_cachep)
1819 kmem_cache_destroy(ocfs2_inode_cachep);
1820 ocfs2_inode_cachep = NULL;
1821
1822 if (ocfs2_dquot_cachep)
1823 kmem_cache_destroy(ocfs2_dquot_cachep);
1824 ocfs2_dquot_cachep = NULL;
1825
1826 if (ocfs2_qf_chunk_cachep)
1827 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1828 ocfs2_qf_chunk_cachep = NULL;
1829 }
1830
1831 static int ocfs2_get_sector(struct super_block *sb,
1832 struct buffer_head **bh,
1833 int block,
1834 int sect_size)
1835 {
1836 if (!sb_set_blocksize(sb, sect_size)) {
1837 mlog(ML_ERROR, "unable to set blocksize\n");
1838 return -EIO;
1839 }
1840
1841 *bh = sb_getblk(sb, block);
1842 if (!*bh) {
1843 mlog_errno(-EIO);
1844 return -EIO;
1845 }
1846 lock_buffer(*bh);
1847 if (!buffer_dirty(*bh))
1848 clear_buffer_uptodate(*bh);
1849 unlock_buffer(*bh);
1850 ll_rw_block(READ, 1, bh);
1851 wait_on_buffer(*bh);
1852 if (!buffer_uptodate(*bh)) {
1853 mlog_errno(-EIO);
1854 brelse(*bh);
1855 *bh = NULL;
1856 return -EIO;
1857 }
1858
1859 return 0;
1860 }
1861
1862 static int ocfs2_mount_volume(struct super_block *sb)
1863 {
1864 int status = 0;
1865 int unlock_super = 0;
1866 struct ocfs2_super *osb = OCFS2_SB(sb);
1867
1868 if (ocfs2_is_hard_readonly(osb))
1869 goto leave;
1870
1871 status = ocfs2_dlm_init(osb);
1872 if (status < 0) {
1873 mlog_errno(status);
1874 goto leave;
1875 }
1876
1877 status = ocfs2_super_lock(osb, 1);
1878 if (status < 0) {
1879 mlog_errno(status);
1880 goto leave;
1881 }
1882 unlock_super = 1;
1883
1884 /* This will load up the node map and add ourselves to it. */
1885 status = ocfs2_find_slot(osb);
1886 if (status < 0) {
1887 mlog_errno(status);
1888 goto leave;
1889 }
1890
1891 /* load all node-local system inodes */
1892 status = ocfs2_init_local_system_inodes(osb);
1893 if (status < 0) {
1894 mlog_errno(status);
1895 goto leave;
1896 }
1897
1898 status = ocfs2_check_volume(osb);
1899 if (status < 0) {
1900 mlog_errno(status);
1901 goto leave;
1902 }
1903
1904 status = ocfs2_truncate_log_init(osb);
1905 if (status < 0)
1906 mlog_errno(status);
1907
1908 leave:
1909 if (unlock_super)
1910 ocfs2_super_unlock(osb, 1);
1911
1912 return status;
1913 }
1914
1915 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1916 {
1917 int tmp, hangup_needed = 0;
1918 struct ocfs2_super *osb = NULL;
1919 char nodestr[8];
1920
1921 trace_ocfs2_dismount_volume(sb);
1922
1923 BUG_ON(!sb);
1924 osb = OCFS2_SB(sb);
1925 BUG_ON(!osb);
1926
1927 debugfs_remove(osb->osb_ctxt);
1928
1929 /*
1930 * Flush inode dropping work queue so that deletes are
1931 * performed while the filesystem is still working
1932 */
1933 ocfs2_drop_all_dl_inodes(osb);
1934
1935 /* Orphan scan should be stopped as early as possible */
1936 ocfs2_orphan_scan_stop(osb);
1937
1938 ocfs2_disable_quotas(osb);
1939
1940 ocfs2_shutdown_local_alloc(osb);
1941
1942 ocfs2_truncate_log_shutdown(osb);
1943
1944 /* This will disable recovery and flush any recovery work. */
1945 ocfs2_recovery_exit(osb);
1946
1947 ocfs2_journal_shutdown(osb);
1948
1949 ocfs2_sync_blockdev(sb);
1950
1951 ocfs2_purge_refcount_trees(osb);
1952
1953 /* No cluster connection means we've failed during mount, so skip
1954 * all the steps which depended on that to complete. */
1955 if (osb->cconn) {
1956 tmp = ocfs2_super_lock(osb, 1);
1957 if (tmp < 0) {
1958 mlog_errno(tmp);
1959 return;
1960 }
1961 }
1962
1963 if (osb->slot_num != OCFS2_INVALID_SLOT)
1964 ocfs2_put_slot(osb);
1965
1966 if (osb->cconn)
1967 ocfs2_super_unlock(osb, 1);
1968
1969 ocfs2_release_system_inodes(osb);
1970
1971 /*
1972 * If we're dismounting due to mount error, mount.ocfs2 will clean
1973 * up heartbeat. If we're a local mount, there is no heartbeat.
1974 * If we failed before we got a uuid_str yet, we can't stop
1975 * heartbeat. Otherwise, do it.
1976 */
1977 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1978 hangup_needed = 1;
1979
1980 if (osb->cconn)
1981 ocfs2_dlm_shutdown(osb, hangup_needed);
1982
1983 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1984 debugfs_remove(osb->osb_debug_root);
1985
1986 if (hangup_needed)
1987 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1988
1989 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1990
1991 if (ocfs2_mount_local(osb))
1992 snprintf(nodestr, sizeof(nodestr), "local");
1993 else
1994 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1995
1996 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1997 osb->dev_str, nodestr);
1998
1999 ocfs2_delete_osb(osb);
2000 kfree(osb);
2001 sb->s_dev = 0;
2002 sb->s_fs_info = NULL;
2003 }
2004
2005 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2006 unsigned uuid_bytes)
2007 {
2008 int i, ret;
2009 char *ptr;
2010
2011 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2012
2013 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2014 if (osb->uuid_str == NULL)
2015 return -ENOMEM;
2016
2017 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2018 /* print with null */
2019 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2020 if (ret != 2) /* drop super cleans up */
2021 return -EINVAL;
2022 /* then only advance past the last char */
2023 ptr += 2;
2024 }
2025
2026 return 0;
2027 }
2028
2029 /* Make sure entire volume is addressable by our journal. Requires
2030 osb_clusters_at_boot to be valid and for the journal to have been
2031 initialized by ocfs2_journal_init(). */
2032 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2033 {
2034 int status = 0;
2035 u64 max_block =
2036 ocfs2_clusters_to_blocks(osb->sb,
2037 osb->osb_clusters_at_boot) - 1;
2038
2039 /* 32-bit block number is always OK. */
2040 if (max_block <= (u32)~0ULL)
2041 goto out;
2042
2043 /* Volume is "huge", so see if our journal is new enough to
2044 support it. */
2045 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2046 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2047 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2048 JBD2_FEATURE_INCOMPAT_64BIT))) {
2049 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2050 "Enable the 'block64' journal option with tunefs.ocfs2");
2051 status = -EFBIG;
2052 goto out;
2053 }
2054
2055 out:
2056 return status;
2057 }
2058
2059 static int ocfs2_initialize_super(struct super_block *sb,
2060 struct buffer_head *bh,
2061 int sector_size,
2062 struct ocfs2_blockcheck_stats *stats)
2063 {
2064 int status;
2065 int i, cbits, bbits;
2066 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2067 struct inode *inode = NULL;
2068 struct ocfs2_journal *journal;
2069 __le32 uuid_net_key;
2070 struct ocfs2_super *osb;
2071 u64 total_blocks;
2072
2073 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2074 if (!osb) {
2075 status = -ENOMEM;
2076 mlog_errno(status);
2077 goto bail;
2078 }
2079
2080 sb->s_fs_info = osb;
2081 sb->s_op = &ocfs2_sops;
2082 sb->s_d_op = &ocfs2_dentry_ops;
2083 sb->s_export_op = &ocfs2_export_ops;
2084 sb->s_qcop = &ocfs2_quotactl_ops;
2085 sb->dq_op = &ocfs2_quota_operations;
2086 sb->s_xattr = ocfs2_xattr_handlers;
2087 sb->s_time_gran = 1;
2088 sb->s_flags |= MS_NOATIME;
2089 /* this is needed to support O_LARGEFILE */
2090 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2091 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2092 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2093
2094 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2095
2096 for (i = 0; i < 3; i++)
2097 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2098 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2099
2100 osb->sb = sb;
2101 /* Save off for ocfs2_rw_direct */
2102 osb->s_sectsize_bits = blksize_bits(sector_size);
2103 BUG_ON(!osb->s_sectsize_bits);
2104
2105 spin_lock_init(&osb->dc_task_lock);
2106 init_waitqueue_head(&osb->dc_event);
2107 osb->dc_work_sequence = 0;
2108 osb->dc_wake_sequence = 0;
2109 INIT_LIST_HEAD(&osb->blocked_lock_list);
2110 osb->blocked_lock_count = 0;
2111 spin_lock_init(&osb->osb_lock);
2112 spin_lock_init(&osb->osb_xattr_lock);
2113 ocfs2_init_steal_slots(osb);
2114
2115 atomic_set(&osb->alloc_stats.moves, 0);
2116 atomic_set(&osb->alloc_stats.local_data, 0);
2117 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2118 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2119 atomic_set(&osb->alloc_stats.bg_extends, 0);
2120
2121 /* Copy the blockcheck stats from the superblock probe */
2122 osb->osb_ecc_stats = *stats;
2123
2124 ocfs2_init_node_maps(osb);
2125
2126 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2127 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2128
2129 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2130 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2131 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2132 osb->max_slots);
2133 status = -EINVAL;
2134 goto bail;
2135 }
2136
2137 ocfs2_orphan_scan_init(osb);
2138
2139 status = ocfs2_recovery_init(osb);
2140 if (status) {
2141 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2142 mlog_errno(status);
2143 goto bail;
2144 }
2145
2146 init_waitqueue_head(&osb->checkpoint_event);
2147 atomic_set(&osb->needs_checkpoint, 0);
2148
2149 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2150
2151 osb->slot_num = OCFS2_INVALID_SLOT;
2152
2153 osb->s_xattr_inline_size = le16_to_cpu(
2154 di->id2.i_super.s_xattr_inline_size);
2155
2156 osb->local_alloc_state = OCFS2_LA_UNUSED;
2157 osb->local_alloc_bh = NULL;
2158 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2159
2160 init_waitqueue_head(&osb->osb_mount_event);
2161
2162 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2163 if (status) {
2164 mlog_errno(status);
2165 goto bail;
2166 }
2167
2168 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2169 if (!osb->vol_label) {
2170 mlog(ML_ERROR, "unable to alloc vol label\n");
2171 status = -ENOMEM;
2172 goto bail;
2173 }
2174
2175 osb->slot_recovery_generations =
2176 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2177 GFP_KERNEL);
2178 if (!osb->slot_recovery_generations) {
2179 status = -ENOMEM;
2180 mlog_errno(status);
2181 goto bail;
2182 }
2183
2184 init_waitqueue_head(&osb->osb_wipe_event);
2185 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2186 sizeof(*osb->osb_orphan_wipes),
2187 GFP_KERNEL);
2188 if (!osb->osb_orphan_wipes) {
2189 status = -ENOMEM;
2190 mlog_errno(status);
2191 goto bail;
2192 }
2193
2194 osb->osb_rf_lock_tree = RB_ROOT;
2195
2196 osb->s_feature_compat =
2197 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2198 osb->s_feature_ro_compat =
2199 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2200 osb->s_feature_incompat =
2201 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2202
2203 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2204 mlog(ML_ERROR, "couldn't mount because of unsupported "
2205 "optional features (%x).\n", i);
2206 status = -EINVAL;
2207 goto bail;
2208 }
2209 if (!(osb->sb->s_flags & MS_RDONLY) &&
2210 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2211 mlog(ML_ERROR, "couldn't mount RDWR because of "
2212 "unsupported optional features (%x).\n", i);
2213 status = -EINVAL;
2214 goto bail;
2215 }
2216
2217 if (ocfs2_clusterinfo_valid(osb)) {
2218 osb->osb_stackflags =
2219 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2220 memcpy(osb->osb_cluster_stack,
2221 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2222 OCFS2_STACK_LABEL_LEN);
2223 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2224 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2225 mlog(ML_ERROR,
2226 "couldn't mount because of an invalid "
2227 "cluster stack label (%s) \n",
2228 osb->osb_cluster_stack);
2229 status = -EINVAL;
2230 goto bail;
2231 }
2232 } else {
2233 /* The empty string is identical with classic tools that
2234 * don't know about s_cluster_info. */
2235 osb->osb_cluster_stack[0] = '\0';
2236 }
2237
2238 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2239
2240 /* FIXME
2241 * This should be done in ocfs2_journal_init(), but unknown
2242 * ordering issues will cause the filesystem to crash.
2243 * If anyone wants to figure out what part of the code
2244 * refers to osb->journal before ocfs2_journal_init() is run,
2245 * be my guest.
2246 */
2247 /* initialize our journal structure */
2248
2249 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2250 if (!journal) {
2251 mlog(ML_ERROR, "unable to alloc journal\n");
2252 status = -ENOMEM;
2253 goto bail;
2254 }
2255 osb->journal = journal;
2256 journal->j_osb = osb;
2257
2258 atomic_set(&journal->j_num_trans, 0);
2259 init_rwsem(&journal->j_trans_barrier);
2260 init_waitqueue_head(&journal->j_checkpointed);
2261 spin_lock_init(&journal->j_lock);
2262 journal->j_trans_id = (unsigned long) 1;
2263 INIT_LIST_HEAD(&journal->j_la_cleanups);
2264 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2265 journal->j_state = OCFS2_JOURNAL_FREE;
2266
2267 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2268 osb->dentry_lock_list = NULL;
2269
2270 /* get some pseudo constants for clustersize bits */
2271 osb->s_clustersize_bits =
2272 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2273 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2274
2275 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2276 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2277 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2278 osb->s_clustersize);
2279 status = -EINVAL;
2280 goto bail;
2281 }
2282
2283 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2284 le32_to_cpu(di->i_clusters));
2285
2286 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2287 total_blocks);
2288 if (status) {
2289 mlog(ML_ERROR, "Volume too large "
2290 "to mount safely on this system");
2291 status = -EFBIG;
2292 goto bail;
2293 }
2294
2295 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2296 sizeof(di->id2.i_super.s_uuid))) {
2297 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2298 status = -ENOMEM;
2299 goto bail;
2300 }
2301
2302 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2303
2304 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2305 osb->vol_label[63] = '\0';
2306 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2307 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2308 osb->first_cluster_group_blkno =
2309 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2310 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2311 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2312 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2313 (unsigned long long)osb->root_blkno,
2314 (unsigned long long)osb->system_dir_blkno,
2315 osb->s_clustersize_bits);
2316
2317 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2318 if (!osb->osb_dlm_debug) {
2319 status = -ENOMEM;
2320 mlog_errno(status);
2321 goto bail;
2322 }
2323
2324 atomic_set(&osb->vol_state, VOLUME_INIT);
2325
2326 /* load root, system_dir, and all global system inodes */
2327 status = ocfs2_init_global_system_inodes(osb);
2328 if (status < 0) {
2329 mlog_errno(status);
2330 goto bail;
2331 }
2332
2333 /*
2334 * global bitmap
2335 */
2336 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2337 OCFS2_INVALID_SLOT);
2338 if (!inode) {
2339 status = -EINVAL;
2340 mlog_errno(status);
2341 goto bail;
2342 }
2343
2344 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2345 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2346 iput(inode);
2347
2348 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2349 osb->s_feature_incompat) * 8;
2350
2351 status = ocfs2_init_slot_info(osb);
2352 if (status < 0) {
2353 mlog_errno(status);
2354 goto bail;
2355 }
2356 cleancache_init_shared_fs((char *)&uuid_net_key, sb);
2357
2358 bail:
2359 return status;
2360 }
2361
2362 /*
2363 * will return: -EAGAIN if it is ok to keep searching for superblocks
2364 * -EINVAL if there is a bad superblock
2365 * 0 on success
2366 */
2367 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2368 struct buffer_head *bh,
2369 u32 blksz,
2370 struct ocfs2_blockcheck_stats *stats)
2371 {
2372 int status = -EAGAIN;
2373
2374 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2375 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2376 /* We have to do a raw check of the feature here */
2377 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2378 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2379 status = ocfs2_block_check_validate(bh->b_data,
2380 bh->b_size,
2381 &di->i_check,
2382 stats);
2383 if (status)
2384 goto out;
2385 }
2386 status = -EINVAL;
2387 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2388 mlog(ML_ERROR, "found superblock with incorrect block "
2389 "size: found %u, should be %u\n",
2390 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2391 blksz);
2392 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2393 OCFS2_MAJOR_REV_LEVEL ||
2394 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2395 OCFS2_MINOR_REV_LEVEL) {
2396 mlog(ML_ERROR, "found superblock with bad version: "
2397 "found %u.%u, should be %u.%u\n",
2398 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2399 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2400 OCFS2_MAJOR_REV_LEVEL,
2401 OCFS2_MINOR_REV_LEVEL);
2402 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2403 mlog(ML_ERROR, "bad block number on superblock: "
2404 "found %llu, should be %llu\n",
2405 (unsigned long long)le64_to_cpu(di->i_blkno),
2406 (unsigned long long)bh->b_blocknr);
2407 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2408 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2409 mlog(ML_ERROR, "bad cluster size found: %u\n",
2410 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2411 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2412 mlog(ML_ERROR, "bad root_blkno: 0\n");
2413 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2414 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2415 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2416 mlog(ML_ERROR,
2417 "Superblock slots found greater than file system "
2418 "maximum: found %u, max %u\n",
2419 le16_to_cpu(di->id2.i_super.s_max_slots),
2420 OCFS2_MAX_SLOTS);
2421 } else {
2422 /* found it! */
2423 status = 0;
2424 }
2425 }
2426
2427 out:
2428 if (status && status != -EAGAIN)
2429 mlog_errno(status);
2430 return status;
2431 }
2432
2433 static int ocfs2_check_volume(struct ocfs2_super *osb)
2434 {
2435 int status;
2436 int dirty;
2437 int local;
2438 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2439 * recover
2440 * ourselves. */
2441
2442 /* Init our journal object. */
2443 status = ocfs2_journal_init(osb->journal, &dirty);
2444 if (status < 0) {
2445 mlog(ML_ERROR, "Could not initialize journal!\n");
2446 goto finally;
2447 }
2448
2449 /* Now that journal has been initialized, check to make sure
2450 entire volume is addressable. */
2451 status = ocfs2_journal_addressable(osb);
2452 if (status)
2453 goto finally;
2454
2455 /* If the journal was unmounted cleanly then we don't want to
2456 * recover anything. Otherwise, journal_load will do that
2457 * dirty work for us :) */
2458 if (!dirty) {
2459 status = ocfs2_journal_wipe(osb->journal, 0);
2460 if (status < 0) {
2461 mlog_errno(status);
2462 goto finally;
2463 }
2464 } else {
2465 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2466 "recovering volume.\n");
2467 }
2468
2469 local = ocfs2_mount_local(osb);
2470
2471 /* will play back anything left in the journal. */
2472 status = ocfs2_journal_load(osb->journal, local, dirty);
2473 if (status < 0) {
2474 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2475 goto finally;
2476 }
2477
2478 if (dirty) {
2479 /* recover my local alloc if we didn't unmount cleanly. */
2480 status = ocfs2_begin_local_alloc_recovery(osb,
2481 osb->slot_num,
2482 &local_alloc);
2483 if (status < 0) {
2484 mlog_errno(status);
2485 goto finally;
2486 }
2487 /* we complete the recovery process after we've marked
2488 * ourselves as mounted. */
2489 }
2490
2491 status = ocfs2_load_local_alloc(osb);
2492 if (status < 0) {
2493 mlog_errno(status);
2494 goto finally;
2495 }
2496
2497 if (dirty) {
2498 /* Recovery will be completed after we've mounted the
2499 * rest of the volume. */
2500 osb->dirty = 1;
2501 osb->local_alloc_copy = local_alloc;
2502 local_alloc = NULL;
2503 }
2504
2505 /* go through each journal, trylock it and if you get the
2506 * lock, and it's marked as dirty, set the bit in the recover
2507 * map and launch a recovery thread for it. */
2508 status = ocfs2_mark_dead_nodes(osb);
2509 if (status < 0) {
2510 mlog_errno(status);
2511 goto finally;
2512 }
2513
2514 status = ocfs2_compute_replay_slots(osb);
2515 if (status < 0)
2516 mlog_errno(status);
2517
2518 finally:
2519 if (local_alloc)
2520 kfree(local_alloc);
2521
2522 if (status)
2523 mlog_errno(status);
2524 return status;
2525 }
2526
2527 /*
2528 * The routine gets called from dismount or close whenever a dismount on
2529 * volume is requested and the osb open count becomes 1.
2530 * It will remove the osb from the global list and also free up all the
2531 * initialized resources and fileobject.
2532 */
2533 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2534 {
2535 /* This function assumes that the caller has the main osb resource */
2536
2537 ocfs2_free_slot_info(osb);
2538
2539 kfree(osb->osb_orphan_wipes);
2540 kfree(osb->slot_recovery_generations);
2541 /* FIXME
2542 * This belongs in journal shutdown, but because we have to
2543 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2544 * we free it here.
2545 */
2546 kfree(osb->journal);
2547 if (osb->local_alloc_copy)
2548 kfree(osb->local_alloc_copy);
2549 kfree(osb->uuid_str);
2550 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2551 memset(osb, 0, sizeof(struct ocfs2_super));
2552 }
2553
2554 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2555 * panic(). We do not support continue-on-error operation. */
2556 static void ocfs2_handle_error(struct super_block *sb)
2557 {
2558 struct ocfs2_super *osb = OCFS2_SB(sb);
2559
2560 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2561 panic("OCFS2: (device %s): panic forced after error\n",
2562 sb->s_id);
2563
2564 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2565
2566 if (sb->s_flags & MS_RDONLY &&
2567 (ocfs2_is_soft_readonly(osb) ||
2568 ocfs2_is_hard_readonly(osb)))
2569 return;
2570
2571 printk(KERN_CRIT "File system is now read-only due to the potential "
2572 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2573 "system is unmounted.\n");
2574 sb->s_flags |= MS_RDONLY;
2575 ocfs2_set_ro_flag(osb, 0);
2576 }
2577
2578 static char error_buf[1024];
2579
2580 void __ocfs2_error(struct super_block *sb,
2581 const char *function,
2582 const char *fmt, ...)
2583 {
2584 va_list args;
2585
2586 va_start(args, fmt);
2587 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2588 va_end(args);
2589
2590 /* Not using mlog here because we want to show the actual
2591 * function the error came from. */
2592 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2593 sb->s_id, function, error_buf);
2594
2595 ocfs2_handle_error(sb);
2596 }
2597
2598 /* Handle critical errors. This is intentionally more drastic than
2599 * ocfs2_handle_error, so we only use for things like journal errors,
2600 * etc. */
2601 void __ocfs2_abort(struct super_block* sb,
2602 const char *function,
2603 const char *fmt, ...)
2604 {
2605 va_list args;
2606
2607 va_start(args, fmt);
2608 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2609 va_end(args);
2610
2611 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2612 sb->s_id, function, error_buf);
2613
2614 /* We don't have the cluster support yet to go straight to
2615 * hard readonly in here. Until then, we want to keep
2616 * ocfs2_abort() so that we can at least mark critical
2617 * errors.
2618 *
2619 * TODO: This should abort the journal and alert other nodes
2620 * that our slot needs recovery. */
2621
2622 /* Force a panic(). This stinks, but it's better than letting
2623 * things continue without having a proper hard readonly
2624 * here. */
2625 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2626 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2627 ocfs2_handle_error(sb);
2628 }
2629
2630 /*
2631 * Void signal blockers, because in-kernel sigprocmask() only fails
2632 * when SIG_* is wrong.
2633 */
2634 void ocfs2_block_signals(sigset_t *oldset)
2635 {
2636 int rc;
2637 sigset_t blocked;
2638
2639 sigfillset(&blocked);
2640 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2641 BUG_ON(rc);
2642 }
2643
2644 void ocfs2_unblock_signals(sigset_t *oldset)
2645 {
2646 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2647 BUG_ON(rc);
2648 }
2649
2650 module_init(ocfs2_init);
2651 module_exit(ocfs2_exit);
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