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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / fs / ocfs2 / super.c
blob604e12c4e97946a1d6a65bde559402372508c6f9
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 "ver.h"
72 #include "xattr.h"
73 #include "quota.h"
74 #include "refcounttree.h"
75 #include "suballoc.h"
76
77 #include "buffer_head_io.h"
78
79 static struct kmem_cache *ocfs2_inode_cachep = NULL;
80 struct kmem_cache *ocfs2_dquot_cachep;
81 struct kmem_cache *ocfs2_qf_chunk_cachep;
82
83 /* OCFS2 needs to schedule several different types of work which
84 * require cluster locking, disk I/O, recovery waits, etc. Since these
85 * types of work tend to be heavy we avoid using the kernel events
86 * workqueue and schedule on our own. */
87 struct workqueue_struct *ocfs2_wq = NULL;
88
89 static struct dentry *ocfs2_debugfs_root = NULL;
90
91 MODULE_AUTHOR("Oracle");
92 MODULE_LICENSE("GPL");
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 Needs: %d\n", "Commit",
290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
291 osb->osb_commit_interval,
292 atomic_read(&osb->needs_checkpoint));
293
294 out += snprintf(buf + out, len - out,
295 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
296 "Journal", osb->journal->j_state,
297 osb->journal->j_trans_id,
298 atomic_read(&osb->journal->j_num_trans));
299
300 out += snprintf(buf + out, len - out,
301 "%10s => GlobalAllocs: %d LocalAllocs: %d "
302 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
303 "Stats",
304 atomic_read(&osb->alloc_stats.bitmap_data),
305 atomic_read(&osb->alloc_stats.local_data),
306 atomic_read(&osb->alloc_stats.bg_allocs),
307 atomic_read(&osb->alloc_stats.moves),
308 atomic_read(&osb->alloc_stats.bg_extends));
309
310 out += snprintf(buf + out, len - out,
311 "%10s => State: %u Descriptor: %llu Size: %u bits "
312 "Default: %u bits\n",
313 "LocalAlloc", osb->local_alloc_state,
314 (unsigned long long)osb->la_last_gd,
315 osb->local_alloc_bits, osb->local_alloc_default_bits);
316
317 spin_lock(&osb->osb_lock);
318 out += snprintf(buf + out, len - out,
319 "%10s => InodeSlot: %d StolenInodes: %d, "
320 "MetaSlot: %d StolenMeta: %d\n", "Steal",
321 osb->s_inode_steal_slot,
322 atomic_read(&osb->s_num_inodes_stolen),
323 osb->s_meta_steal_slot,
324 atomic_read(&osb->s_num_meta_stolen));
325 spin_unlock(&osb->osb_lock);
326
327 out += snprintf(buf + out, len - out, "OrphanScan => ");
328 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
329 os->os_count, os->os_seqno);
330 out += snprintf(buf + out, len - out, " Last Scan: ");
331 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
332 out += snprintf(buf + out, len - out, "Disabled\n");
333 else
334 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
335 (get_seconds() - os->os_scantime.tv_sec));
336
337 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
338 "Slots", "Num", "RecoGen");
339 for (i = 0; i < osb->max_slots; ++i) {
340 out += snprintf(buf + out, len - out,
341 "%10s %c %3d %10d\n",
342 " ",
343 (i == osb->slot_num ? '*' : ' '),
344 i, osb->slot_recovery_generations[i]);
345 }
346
347 return out;
348 }
349
350 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
351 {
352 struct ocfs2_super *osb = inode->i_private;
353 char *buf = NULL;
354
355 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356 if (!buf)
357 goto bail;
358
359 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
360
361 file->private_data = buf;
362
363 return 0;
364 bail:
365 return -ENOMEM;
366 }
367
368 static int ocfs2_debug_release(struct inode *inode, struct file *file)
369 {
370 kfree(file->private_data);
371 return 0;
372 }
373
374 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
375 size_t nbytes, loff_t *ppos)
376 {
377 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
378 i_size_read(file->f_mapping->host));
379 }
380 #else
381 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
382 {
383 return 0;
384 }
385 static int ocfs2_debug_release(struct inode *inode, struct file *file)
386 {
387 return 0;
388 }
389 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
390 size_t nbytes, loff_t *ppos)
391 {
392 return 0;
393 }
394 #endif /* CONFIG_DEBUG_FS */
395
396 static const struct file_operations ocfs2_osb_debug_fops = {
397 .open = ocfs2_osb_debug_open,
398 .release = ocfs2_debug_release,
399 .read = ocfs2_debug_read,
400 .llseek = generic_file_llseek,
401 };
402
403 static int ocfs2_sync_fs(struct super_block *sb, int wait)
404 {
405 int status;
406 tid_t target;
407 struct ocfs2_super *osb = OCFS2_SB(sb);
408
409 if (ocfs2_is_hard_readonly(osb))
410 return -EROFS;
411
412 if (wait) {
413 status = ocfs2_flush_truncate_log(osb);
414 if (status < 0)
415 mlog_errno(status);
416 } else {
417 ocfs2_schedule_truncate_log_flush(osb, 0);
418 }
419
420 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
421 &target)) {
422 if (wait)
423 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
424 target);
425 }
426 return 0;
427 }
428
429 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
430 {
431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
432 && (ino == USER_QUOTA_SYSTEM_INODE
433 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
434 return 0;
435 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
436 && (ino == GROUP_QUOTA_SYSTEM_INODE
437 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
438 return 0;
439 return 1;
440 }
441
442 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
443 {
444 struct inode *new = NULL;
445 int status = 0;
446 int i;
447
448 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->root_inode = new;
455
456 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
457 if (IS_ERR(new)) {
458 status = PTR_ERR(new);
459 mlog_errno(status);
460 goto bail;
461 }
462 osb->sys_root_inode = new;
463
464 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
465 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
466 if (!ocfs2_need_system_inode(osb, i))
467 continue;
468 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
469 if (!new) {
470 ocfs2_release_system_inodes(osb);
471 status = -EINVAL;
472 mlog_errno(status);
473 /* FIXME: Should ERROR_RO_FS */
474 mlog(ML_ERROR, "Unable to load system inode %d, "
475 "possibly corrupt fs?", i);
476 goto bail;
477 }
478 // the array now has one ref, so drop this one
479 iput(new);
480 }
481
482 bail:
483 if (status)
484 mlog_errno(status);
485 return status;
486 }
487
488 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
489 {
490 struct inode *new = NULL;
491 int status = 0;
492 int i;
493
494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
495 i < NUM_SYSTEM_INODES;
496 i++) {
497 if (!ocfs2_need_system_inode(osb, i))
498 continue;
499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
500 if (!new) {
501 ocfs2_release_system_inodes(osb);
502 status = -EINVAL;
503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
504 status, i, osb->slot_num);
505 goto bail;
506 }
507 /* the array now has one ref, so drop this one */
508 iput(new);
509 }
510
511 bail:
512 if (status)
513 mlog_errno(status);
514 return status;
515 }
516
517 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
518 {
519 int i;
520 struct inode *inode;
521
522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
523 inode = osb->global_system_inodes[i];
524 if (inode) {
525 iput(inode);
526 osb->global_system_inodes[i] = NULL;
527 }
528 }
529
530 inode = osb->sys_root_inode;
531 if (inode) {
532 iput(inode);
533 osb->sys_root_inode = NULL;
534 }
535
536 inode = osb->root_inode;
537 if (inode) {
538 iput(inode);
539 osb->root_inode = NULL;
540 }
541
542 if (!osb->local_system_inodes)
543 return;
544
545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
546 if (osb->local_system_inodes[i]) {
547 iput(osb->local_system_inodes[i]);
548 osb->local_system_inodes[i] = NULL;
549 }
550 }
551
552 kfree(osb->local_system_inodes);
553 osb->local_system_inodes = NULL;
554 }
555
556 /* We're allocating fs objects, use GFP_NOFS */
557 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
558 {
559 struct ocfs2_inode_info *oi;
560
561 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
562 if (!oi)
563 return NULL;
564
565 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
566 return &oi->vfs_inode;
567 }
568
569 static void ocfs2_i_callback(struct rcu_head *head)
570 {
571 struct inode *inode = container_of(head, struct inode, i_rcu);
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 "ocfs2: Readonly device (%s) detected. "
1111 "Cluster services will not be used for this mount. "
1112 "Recovery will be skipped.\n", osb->dev_str);
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 dentry *root)
1537 {
1538 struct ocfs2_super *osb = OCFS2_SB(root->d_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 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1571
1572 if (osb->osb_commit_interval)
1573 seq_printf(s, ",commit=%u",
1574 (unsigned) (osb->osb_commit_interval / HZ));
1575
1576 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1577 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1578 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1579
1580 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1581 seq_printf(s, ",localflocks,");
1582
1583 if (osb->osb_cluster_stack[0])
1584 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1585 osb->osb_cluster_stack);
1586 if (opts & OCFS2_MOUNT_USRQUOTA)
1587 seq_printf(s, ",usrquota");
1588 if (opts & OCFS2_MOUNT_GRPQUOTA)
1589 seq_printf(s, ",grpquota");
1590
1591 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1592 seq_printf(s, ",coherency=buffered");
1593 else
1594 seq_printf(s, ",coherency=full");
1595
1596 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1597 seq_printf(s, ",nouser_xattr");
1598 else
1599 seq_printf(s, ",user_xattr");
1600
1601 if (opts & OCFS2_MOUNT_INODE64)
1602 seq_printf(s, ",inode64");
1603
1604 if (opts & OCFS2_MOUNT_POSIX_ACL)
1605 seq_printf(s, ",acl");
1606 else
1607 seq_printf(s, ",noacl");
1608
1609 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1610 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1611
1612 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1613 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1614
1615 return 0;
1616 }
1617
1618 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ];
1619
1620 static int __init ocfs2_init(void)
1621 {
1622 int status, i;
1623
1624 ocfs2_print_version();
1625
1626 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++)
1627 init_waitqueue_head(&ocfs2__ioend_wq[i]);
1628
1629 status = init_ocfs2_uptodate_cache();
1630 if (status < 0) {
1631 mlog_errno(status);
1632 goto leave;
1633 }
1634
1635 status = ocfs2_initialize_mem_caches();
1636 if (status < 0) {
1637 mlog_errno(status);
1638 goto leave;
1639 }
1640
1641 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1642 if (!ocfs2_wq) {
1643 status = -ENOMEM;
1644 goto leave;
1645 }
1646
1647 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1648 if (!ocfs2_debugfs_root) {
1649 status = -EFAULT;
1650 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1651 }
1652
1653 ocfs2_set_locking_protocol();
1654
1655 status = register_quota_format(&ocfs2_quota_format);
1656 leave:
1657 if (status < 0) {
1658 ocfs2_free_mem_caches();
1659 exit_ocfs2_uptodate_cache();
1660 mlog_errno(status);
1661 }
1662
1663 if (status >= 0) {
1664 return register_filesystem(&ocfs2_fs_type);
1665 } else
1666 return -1;
1667 }
1668
1669 static void __exit ocfs2_exit(void)
1670 {
1671 if (ocfs2_wq) {
1672 flush_workqueue(ocfs2_wq);
1673 destroy_workqueue(ocfs2_wq);
1674 }
1675
1676 unregister_quota_format(&ocfs2_quota_format);
1677
1678 debugfs_remove(ocfs2_debugfs_root);
1679
1680 ocfs2_free_mem_caches();
1681
1682 unregister_filesystem(&ocfs2_fs_type);
1683
1684 exit_ocfs2_uptodate_cache();
1685 }
1686
1687 static void ocfs2_put_super(struct super_block *sb)
1688 {
1689 trace_ocfs2_put_super(sb);
1690
1691 ocfs2_sync_blockdev(sb);
1692 ocfs2_dismount_volume(sb, 0);
1693 }
1694
1695 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1696 {
1697 struct ocfs2_super *osb;
1698 u32 numbits, freebits;
1699 int status;
1700 struct ocfs2_dinode *bm_lock;
1701 struct buffer_head *bh = NULL;
1702 struct inode *inode = NULL;
1703
1704 trace_ocfs2_statfs(dentry->d_sb, buf);
1705
1706 osb = OCFS2_SB(dentry->d_sb);
1707
1708 inode = ocfs2_get_system_file_inode(osb,
1709 GLOBAL_BITMAP_SYSTEM_INODE,
1710 OCFS2_INVALID_SLOT);
1711 if (!inode) {
1712 mlog(ML_ERROR, "failed to get bitmap inode\n");
1713 status = -EIO;
1714 goto bail;
1715 }
1716
1717 status = ocfs2_inode_lock(inode, &bh, 0);
1718 if (status < 0) {
1719 mlog_errno(status);
1720 goto bail;
1721 }
1722
1723 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1724
1725 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1726 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1727
1728 buf->f_type = OCFS2_SUPER_MAGIC;
1729 buf->f_bsize = dentry->d_sb->s_blocksize;
1730 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1731 buf->f_blocks = ((sector_t) numbits) *
1732 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1733 buf->f_bfree = ((sector_t) freebits) *
1734 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1735 buf->f_bavail = buf->f_bfree;
1736 buf->f_files = numbits;
1737 buf->f_ffree = freebits;
1738 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1739 & 0xFFFFFFFFUL;
1740 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1741 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1742
1743 brelse(bh);
1744
1745 ocfs2_inode_unlock(inode, 0);
1746 status = 0;
1747 bail:
1748 if (inode)
1749 iput(inode);
1750
1751 if (status)
1752 mlog_errno(status);
1753
1754 return status;
1755 }
1756
1757 static void ocfs2_inode_init_once(void *data)
1758 {
1759 struct ocfs2_inode_info *oi = data;
1760
1761 oi->ip_flags = 0;
1762 oi->ip_open_count = 0;
1763 spin_lock_init(&oi->ip_lock);
1764 ocfs2_extent_map_init(&oi->vfs_inode);
1765 INIT_LIST_HEAD(&oi->ip_io_markers);
1766 oi->ip_dir_start_lookup = 0;
1767 atomic_set(&oi->ip_unaligned_aio, 0);
1768 init_rwsem(&oi->ip_alloc_sem);
1769 init_rwsem(&oi->ip_xattr_sem);
1770 mutex_init(&oi->ip_io_mutex);
1771
1772 oi->ip_blkno = 0ULL;
1773 oi->ip_clusters = 0;
1774
1775 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1776
1777 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1778 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1779 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1780
1781 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1782 &ocfs2_inode_caching_ops);
1783
1784 inode_init_once(&oi->vfs_inode);
1785 }
1786
1787 static int ocfs2_initialize_mem_caches(void)
1788 {
1789 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1790 sizeof(struct ocfs2_inode_info),
1791 0,
1792 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1793 SLAB_MEM_SPREAD),
1794 ocfs2_inode_init_once);
1795 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1796 sizeof(struct ocfs2_dquot),
1797 0,
1798 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1799 SLAB_MEM_SPREAD),
1800 NULL);
1801 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1802 sizeof(struct ocfs2_quota_chunk),
1803 0,
1804 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1805 NULL);
1806 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1807 !ocfs2_qf_chunk_cachep) {
1808 if (ocfs2_inode_cachep)
1809 kmem_cache_destroy(ocfs2_inode_cachep);
1810 if (ocfs2_dquot_cachep)
1811 kmem_cache_destroy(ocfs2_dquot_cachep);
1812 if (ocfs2_qf_chunk_cachep)
1813 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1814 return -ENOMEM;
1815 }
1816
1817 return 0;
1818 }
1819
1820 static void ocfs2_free_mem_caches(void)
1821 {
1822 if (ocfs2_inode_cachep)
1823 kmem_cache_destroy(ocfs2_inode_cachep);
1824 ocfs2_inode_cachep = NULL;
1825
1826 if (ocfs2_dquot_cachep)
1827 kmem_cache_destroy(ocfs2_dquot_cachep);
1828 ocfs2_dquot_cachep = NULL;
1829
1830 if (ocfs2_qf_chunk_cachep)
1831 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1832 ocfs2_qf_chunk_cachep = NULL;
1833 }
1834
1835 static int ocfs2_get_sector(struct super_block *sb,
1836 struct buffer_head **bh,
1837 int block,
1838 int sect_size)
1839 {
1840 if (!sb_set_blocksize(sb, sect_size)) {
1841 mlog(ML_ERROR, "unable to set blocksize\n");
1842 return -EIO;
1843 }
1844
1845 *bh = sb_getblk(sb, block);
1846 if (!*bh) {
1847 mlog_errno(-EIO);
1848 return -EIO;
1849 }
1850 lock_buffer(*bh);
1851 if (!buffer_dirty(*bh))
1852 clear_buffer_uptodate(*bh);
1853 unlock_buffer(*bh);
1854 ll_rw_block(READ, 1, bh);
1855 wait_on_buffer(*bh);
1856 if (!buffer_uptodate(*bh)) {
1857 mlog_errno(-EIO);
1858 brelse(*bh);
1859 *bh = NULL;
1860 return -EIO;
1861 }
1862
1863 return 0;
1864 }
1865
1866 static int ocfs2_mount_volume(struct super_block *sb)
1867 {
1868 int status = 0;
1869 int unlock_super = 0;
1870 struct ocfs2_super *osb = OCFS2_SB(sb);
1871
1872 if (ocfs2_is_hard_readonly(osb))
1873 goto leave;
1874
1875 status = ocfs2_dlm_init(osb);
1876 if (status < 0) {
1877 mlog_errno(status);
1878 goto leave;
1879 }
1880
1881 status = ocfs2_super_lock(osb, 1);
1882 if (status < 0) {
1883 mlog_errno(status);
1884 goto leave;
1885 }
1886 unlock_super = 1;
1887
1888 /* This will load up the node map and add ourselves to it. */
1889 status = ocfs2_find_slot(osb);
1890 if (status < 0) {
1891 mlog_errno(status);
1892 goto leave;
1893 }
1894
1895 /* load all node-local system inodes */
1896 status = ocfs2_init_local_system_inodes(osb);
1897 if (status < 0) {
1898 mlog_errno(status);
1899 goto leave;
1900 }
1901
1902 status = ocfs2_check_volume(osb);
1903 if (status < 0) {
1904 mlog_errno(status);
1905 goto leave;
1906 }
1907
1908 status = ocfs2_truncate_log_init(osb);
1909 if (status < 0)
1910 mlog_errno(status);
1911
1912 leave:
1913 if (unlock_super)
1914 ocfs2_super_unlock(osb, 1);
1915
1916 return status;
1917 }
1918
1919 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1920 {
1921 int tmp, hangup_needed = 0;
1922 struct ocfs2_super *osb = NULL;
1923 char nodestr[8];
1924
1925 trace_ocfs2_dismount_volume(sb);
1926
1927 BUG_ON(!sb);
1928 osb = OCFS2_SB(sb);
1929 BUG_ON(!osb);
1930
1931 debugfs_remove(osb->osb_ctxt);
1932
1933 /*
1934 * Flush inode dropping work queue so that deletes are
1935 * performed while the filesystem is still working
1936 */
1937 ocfs2_drop_all_dl_inodes(osb);
1938
1939 /* Orphan scan should be stopped as early as possible */
1940 ocfs2_orphan_scan_stop(osb);
1941
1942 ocfs2_disable_quotas(osb);
1943
1944 ocfs2_shutdown_local_alloc(osb);
1945
1946 ocfs2_truncate_log_shutdown(osb);
1947
1948 /* This will disable recovery and flush any recovery work. */
1949 ocfs2_recovery_exit(osb);
1950
1951 ocfs2_journal_shutdown(osb);
1952
1953 ocfs2_sync_blockdev(sb);
1954
1955 ocfs2_purge_refcount_trees(osb);
1956
1957 /* No cluster connection means we've failed during mount, so skip
1958 * all the steps which depended on that to complete. */
1959 if (osb->cconn) {
1960 tmp = ocfs2_super_lock(osb, 1);
1961 if (tmp < 0) {
1962 mlog_errno(tmp);
1963 return;
1964 }
1965 }
1966
1967 if (osb->slot_num != OCFS2_INVALID_SLOT)
1968 ocfs2_put_slot(osb);
1969
1970 if (osb->cconn)
1971 ocfs2_super_unlock(osb, 1);
1972
1973 ocfs2_release_system_inodes(osb);
1974
1975 /*
1976 * If we're dismounting due to mount error, mount.ocfs2 will clean
1977 * up heartbeat. If we're a local mount, there is no heartbeat.
1978 * If we failed before we got a uuid_str yet, we can't stop
1979 * heartbeat. Otherwise, do it.
1980 */
1981 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1982 !ocfs2_is_hard_readonly(osb))
1983 hangup_needed = 1;
1984
1985 if (osb->cconn)
1986 ocfs2_dlm_shutdown(osb, hangup_needed);
1987
1988 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1989 debugfs_remove(osb->osb_debug_root);
1990
1991 if (hangup_needed)
1992 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1993
1994 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1995
1996 if (ocfs2_mount_local(osb))
1997 snprintf(nodestr, sizeof(nodestr), "local");
1998 else
1999 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2000
2001 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2002 osb->dev_str, nodestr);
2003
2004 ocfs2_delete_osb(osb);
2005 kfree(osb);
2006 sb->s_dev = 0;
2007 sb->s_fs_info = NULL;
2008 }
2009
2010 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2011 unsigned uuid_bytes)
2012 {
2013 int i, ret;
2014 char *ptr;
2015
2016 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2017
2018 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2019 if (osb->uuid_str == NULL)
2020 return -ENOMEM;
2021
2022 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2023 /* print with null */
2024 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2025 if (ret != 2) /* drop super cleans up */
2026 return -EINVAL;
2027 /* then only advance past the last char */
2028 ptr += 2;
2029 }
2030
2031 return 0;
2032 }
2033
2034 /* Make sure entire volume is addressable by our journal. Requires
2035 osb_clusters_at_boot to be valid and for the journal to have been
2036 initialized by ocfs2_journal_init(). */
2037 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2038 {
2039 int status = 0;
2040 u64 max_block =
2041 ocfs2_clusters_to_blocks(osb->sb,
2042 osb->osb_clusters_at_boot) - 1;
2043
2044 /* 32-bit block number is always OK. */
2045 if (max_block <= (u32)~0ULL)
2046 goto out;
2047
2048 /* Volume is "huge", so see if our journal is new enough to
2049 support it. */
2050 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2051 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2052 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2053 JBD2_FEATURE_INCOMPAT_64BIT))) {
2054 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2055 "Enable the 'block64' journal option with tunefs.ocfs2");
2056 status = -EFBIG;
2057 goto out;
2058 }
2059
2060 out:
2061 return status;
2062 }
2063
2064 static int ocfs2_initialize_super(struct super_block *sb,
2065 struct buffer_head *bh,
2066 int sector_size,
2067 struct ocfs2_blockcheck_stats *stats)
2068 {
2069 int status;
2070 int i, cbits, bbits;
2071 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2072 struct inode *inode = NULL;
2073 struct ocfs2_journal *journal;
2074 __le32 uuid_net_key;
2075 struct ocfs2_super *osb;
2076 u64 total_blocks;
2077
2078 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2079 if (!osb) {
2080 status = -ENOMEM;
2081 mlog_errno(status);
2082 goto bail;
2083 }
2084
2085 sb->s_fs_info = osb;
2086 sb->s_op = &ocfs2_sops;
2087 sb->s_d_op = &ocfs2_dentry_ops;
2088 sb->s_export_op = &ocfs2_export_ops;
2089 sb->s_qcop = &ocfs2_quotactl_ops;
2090 sb->dq_op = &ocfs2_quota_operations;
2091 sb->s_xattr = ocfs2_xattr_handlers;
2092 sb->s_time_gran = 1;
2093 sb->s_flags |= MS_NOATIME;
2094 /* this is needed to support O_LARGEFILE */
2095 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2096 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2097 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2098
2099 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2100
2101 for (i = 0; i < 3; i++)
2102 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2103 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2104
2105 osb->sb = sb;
2106 /* Save off for ocfs2_rw_direct */
2107 osb->s_sectsize_bits = blksize_bits(sector_size);
2108 BUG_ON(!osb->s_sectsize_bits);
2109
2110 spin_lock_init(&osb->dc_task_lock);
2111 init_waitqueue_head(&osb->dc_event);
2112 osb->dc_work_sequence = 0;
2113 osb->dc_wake_sequence = 0;
2114 INIT_LIST_HEAD(&osb->blocked_lock_list);
2115 osb->blocked_lock_count = 0;
2116 spin_lock_init(&osb->osb_lock);
2117 spin_lock_init(&osb->osb_xattr_lock);
2118 ocfs2_init_steal_slots(osb);
2119
2120 atomic_set(&osb->alloc_stats.moves, 0);
2121 atomic_set(&osb->alloc_stats.local_data, 0);
2122 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2123 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2124 atomic_set(&osb->alloc_stats.bg_extends, 0);
2125
2126 /* Copy the blockcheck stats from the superblock probe */
2127 osb->osb_ecc_stats = *stats;
2128
2129 ocfs2_init_node_maps(osb);
2130
2131 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2132 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2133
2134 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2135 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2136 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2137 osb->max_slots);
2138 status = -EINVAL;
2139 goto bail;
2140 }
2141
2142 ocfs2_orphan_scan_init(osb);
2143
2144 status = ocfs2_recovery_init(osb);
2145 if (status) {
2146 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2147 mlog_errno(status);
2148 goto bail;
2149 }
2150
2151 init_waitqueue_head(&osb->checkpoint_event);
2152 atomic_set(&osb->needs_checkpoint, 0);
2153
2154 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2155
2156 osb->slot_num = OCFS2_INVALID_SLOT;
2157
2158 osb->s_xattr_inline_size = le16_to_cpu(
2159 di->id2.i_super.s_xattr_inline_size);
2160
2161 osb->local_alloc_state = OCFS2_LA_UNUSED;
2162 osb->local_alloc_bh = NULL;
2163 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2164
2165 init_waitqueue_head(&osb->osb_mount_event);
2166
2167 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2168 if (status) {
2169 mlog_errno(status);
2170 goto bail;
2171 }
2172
2173 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2174 if (!osb->vol_label) {
2175 mlog(ML_ERROR, "unable to alloc vol label\n");
2176 status = -ENOMEM;
2177 goto bail;
2178 }
2179
2180 osb->slot_recovery_generations =
2181 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2182 GFP_KERNEL);
2183 if (!osb->slot_recovery_generations) {
2184 status = -ENOMEM;
2185 mlog_errno(status);
2186 goto bail;
2187 }
2188
2189 init_waitqueue_head(&osb->osb_wipe_event);
2190 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2191 sizeof(*osb->osb_orphan_wipes),
2192 GFP_KERNEL);
2193 if (!osb->osb_orphan_wipes) {
2194 status = -ENOMEM;
2195 mlog_errno(status);
2196 goto bail;
2197 }
2198
2199 osb->osb_rf_lock_tree = RB_ROOT;
2200
2201 osb->s_feature_compat =
2202 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2203 osb->s_feature_ro_compat =
2204 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2205 osb->s_feature_incompat =
2206 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2207
2208 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2209 mlog(ML_ERROR, "couldn't mount because of unsupported "
2210 "optional features (%x).\n", i);
2211 status = -EINVAL;
2212 goto bail;
2213 }
2214 if (!(osb->sb->s_flags & MS_RDONLY) &&
2215 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2216 mlog(ML_ERROR, "couldn't mount RDWR because of "
2217 "unsupported optional features (%x).\n", i);
2218 status = -EINVAL;
2219 goto bail;
2220 }
2221
2222 if (ocfs2_clusterinfo_valid(osb)) {
2223 osb->osb_stackflags =
2224 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2225 memcpy(osb->osb_cluster_stack,
2226 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2227 OCFS2_STACK_LABEL_LEN);
2228 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2229 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2230 mlog(ML_ERROR,
2231 "couldn't mount because of an invalid "
2232 "cluster stack label (%s) \n",
2233 osb->osb_cluster_stack);
2234 status = -EINVAL;
2235 goto bail;
2236 }
2237 } else {
2238 /* The empty string is identical with classic tools that
2239 * don't know about s_cluster_info. */
2240 osb->osb_cluster_stack[0] = '\0';
2241 }
2242
2243 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2244
2245 /* FIXME
2246 * This should be done in ocfs2_journal_init(), but unknown
2247 * ordering issues will cause the filesystem to crash.
2248 * If anyone wants to figure out what part of the code
2249 * refers to osb->journal before ocfs2_journal_init() is run,
2250 * be my guest.
2251 */
2252 /* initialize our journal structure */
2253
2254 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2255 if (!journal) {
2256 mlog(ML_ERROR, "unable to alloc journal\n");
2257 status = -ENOMEM;
2258 goto bail;
2259 }
2260 osb->journal = journal;
2261 journal->j_osb = osb;
2262
2263 atomic_set(&journal->j_num_trans, 0);
2264 init_rwsem(&journal->j_trans_barrier);
2265 init_waitqueue_head(&journal->j_checkpointed);
2266 spin_lock_init(&journal->j_lock);
2267 journal->j_trans_id = (unsigned long) 1;
2268 INIT_LIST_HEAD(&journal->j_la_cleanups);
2269 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2270 journal->j_state = OCFS2_JOURNAL_FREE;
2271
2272 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2273 osb->dentry_lock_list = NULL;
2274
2275 /* get some pseudo constants for clustersize bits */
2276 osb->s_clustersize_bits =
2277 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2278 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2279
2280 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2281 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2282 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2283 osb->s_clustersize);
2284 status = -EINVAL;
2285 goto bail;
2286 }
2287
2288 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2289 le32_to_cpu(di->i_clusters));
2290
2291 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2292 total_blocks);
2293 if (status) {
2294 mlog(ML_ERROR, "Volume too large "
2295 "to mount safely on this system");
2296 status = -EFBIG;
2297 goto bail;
2298 }
2299
2300 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2301 sizeof(di->id2.i_super.s_uuid))) {
2302 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2303 status = -ENOMEM;
2304 goto bail;
2305 }
2306
2307 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2308
2309 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2310 osb->vol_label[63] = '\0';
2311 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2312 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2313 osb->first_cluster_group_blkno =
2314 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2315 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2316 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2317 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2318 (unsigned long long)osb->root_blkno,
2319 (unsigned long long)osb->system_dir_blkno,
2320 osb->s_clustersize_bits);
2321
2322 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2323 if (!osb->osb_dlm_debug) {
2324 status = -ENOMEM;
2325 mlog_errno(status);
2326 goto bail;
2327 }
2328
2329 atomic_set(&osb->vol_state, VOLUME_INIT);
2330
2331 /* load root, system_dir, and all global system inodes */
2332 status = ocfs2_init_global_system_inodes(osb);
2333 if (status < 0) {
2334 mlog_errno(status);
2335 goto bail;
2336 }
2337
2338 /*
2339 * global bitmap
2340 */
2341 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2342 OCFS2_INVALID_SLOT);
2343 if (!inode) {
2344 status = -EINVAL;
2345 mlog_errno(status);
2346 goto bail;
2347 }
2348
2349 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2350 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2351 iput(inode);
2352
2353 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2354 osb->s_feature_incompat) * 8;
2355
2356 status = ocfs2_init_slot_info(osb);
2357 if (status < 0) {
2358 mlog_errno(status);
2359 goto bail;
2360 }
2361 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb);
2362
2363 bail:
2364 return status;
2365 }
2366
2367 /*
2368 * will return: -EAGAIN if it is ok to keep searching for superblocks
2369 * -EINVAL if there is a bad superblock
2370 * 0 on success
2371 */
2372 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2373 struct buffer_head *bh,
2374 u32 blksz,
2375 struct ocfs2_blockcheck_stats *stats)
2376 {
2377 int status = -EAGAIN;
2378
2379 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2380 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2381 /* We have to do a raw check of the feature here */
2382 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2383 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2384 status = ocfs2_block_check_validate(bh->b_data,
2385 bh->b_size,
2386 &di->i_check,
2387 stats);
2388 if (status)
2389 goto out;
2390 }
2391 status = -EINVAL;
2392 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2393 mlog(ML_ERROR, "found superblock with incorrect block "
2394 "size: found %u, should be %u\n",
2395 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2396 blksz);
2397 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2398 OCFS2_MAJOR_REV_LEVEL ||
2399 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2400 OCFS2_MINOR_REV_LEVEL) {
2401 mlog(ML_ERROR, "found superblock with bad version: "
2402 "found %u.%u, should be %u.%u\n",
2403 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2404 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2405 OCFS2_MAJOR_REV_LEVEL,
2406 OCFS2_MINOR_REV_LEVEL);
2407 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2408 mlog(ML_ERROR, "bad block number on superblock: "
2409 "found %llu, should be %llu\n",
2410 (unsigned long long)le64_to_cpu(di->i_blkno),
2411 (unsigned long long)bh->b_blocknr);
2412 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2413 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2414 mlog(ML_ERROR, "bad cluster size found: %u\n",
2415 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2416 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2417 mlog(ML_ERROR, "bad root_blkno: 0\n");
2418 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2419 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2420 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2421 mlog(ML_ERROR,
2422 "Superblock slots found greater than file system "
2423 "maximum: found %u, max %u\n",
2424 le16_to_cpu(di->id2.i_super.s_max_slots),
2425 OCFS2_MAX_SLOTS);
2426 } else {
2427 /* found it! */
2428 status = 0;
2429 }
2430 }
2431
2432 out:
2433 if (status && status != -EAGAIN)
2434 mlog_errno(status);
2435 return status;
2436 }
2437
2438 static int ocfs2_check_volume(struct ocfs2_super *osb)
2439 {
2440 int status;
2441 int dirty;
2442 int local;
2443 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2444 * recover
2445 * ourselves. */
2446
2447 /* Init our journal object. */
2448 status = ocfs2_journal_init(osb->journal, &dirty);
2449 if (status < 0) {
2450 mlog(ML_ERROR, "Could not initialize journal!\n");
2451 goto finally;
2452 }
2453
2454 /* Now that journal has been initialized, check to make sure
2455 entire volume is addressable. */
2456 status = ocfs2_journal_addressable(osb);
2457 if (status)
2458 goto finally;
2459
2460 /* If the journal was unmounted cleanly then we don't want to
2461 * recover anything. Otherwise, journal_load will do that
2462 * dirty work for us :) */
2463 if (!dirty) {
2464 status = ocfs2_journal_wipe(osb->journal, 0);
2465 if (status < 0) {
2466 mlog_errno(status);
2467 goto finally;
2468 }
2469 } else {
2470 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2471 "unmounted cleanly, recovering it.\n", osb->dev_str);
2472 }
2473
2474 local = ocfs2_mount_local(osb);
2475
2476 /* will play back anything left in the journal. */
2477 status = ocfs2_journal_load(osb->journal, local, dirty);
2478 if (status < 0) {
2479 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2480 goto finally;
2481 }
2482
2483 if (dirty) {
2484 /* recover my local alloc if we didn't unmount cleanly. */
2485 status = ocfs2_begin_local_alloc_recovery(osb,
2486 osb->slot_num,
2487 &local_alloc);
2488 if (status < 0) {
2489 mlog_errno(status);
2490 goto finally;
2491 }
2492 /* we complete the recovery process after we've marked
2493 * ourselves as mounted. */
2494 }
2495
2496 status = ocfs2_load_local_alloc(osb);
2497 if (status < 0) {
2498 mlog_errno(status);
2499 goto finally;
2500 }
2501
2502 if (dirty) {
2503 /* Recovery will be completed after we've mounted the
2504 * rest of the volume. */
2505 osb->dirty = 1;
2506 osb->local_alloc_copy = local_alloc;
2507 local_alloc = NULL;
2508 }
2509
2510 /* go through each journal, trylock it and if you get the
2511 * lock, and it's marked as dirty, set the bit in the recover
2512 * map and launch a recovery thread for it. */
2513 status = ocfs2_mark_dead_nodes(osb);
2514 if (status < 0) {
2515 mlog_errno(status);
2516 goto finally;
2517 }
2518
2519 status = ocfs2_compute_replay_slots(osb);
2520 if (status < 0)
2521 mlog_errno(status);
2522
2523 finally:
2524 if (local_alloc)
2525 kfree(local_alloc);
2526
2527 if (status)
2528 mlog_errno(status);
2529 return status;
2530 }
2531
2532 /*
2533 * The routine gets called from dismount or close whenever a dismount on
2534 * volume is requested and the osb open count becomes 1.
2535 * It will remove the osb from the global list and also free up all the
2536 * initialized resources and fileobject.
2537 */
2538 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2539 {
2540 /* This function assumes that the caller has the main osb resource */
2541
2542 ocfs2_free_slot_info(osb);
2543
2544 kfree(osb->osb_orphan_wipes);
2545 kfree(osb->slot_recovery_generations);
2546 /* FIXME
2547 * This belongs in journal shutdown, but because we have to
2548 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2549 * we free it here.
2550 */
2551 kfree(osb->journal);
2552 if (osb->local_alloc_copy)
2553 kfree(osb->local_alloc_copy);
2554 kfree(osb->uuid_str);
2555 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2556 memset(osb, 0, sizeof(struct ocfs2_super));
2557 }
2558
2559 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2560 * panic(). We do not support continue-on-error operation. */
2561 static void ocfs2_handle_error(struct super_block *sb)
2562 {
2563 struct ocfs2_super *osb = OCFS2_SB(sb);
2564
2565 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2566 panic("OCFS2: (device %s): panic forced after error\n",
2567 sb->s_id);
2568
2569 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2570
2571 if (sb->s_flags & MS_RDONLY &&
2572 (ocfs2_is_soft_readonly(osb) ||
2573 ocfs2_is_hard_readonly(osb)))
2574 return;
2575
2576 printk(KERN_CRIT "File system is now read-only due to the potential "
2577 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2578 "system is unmounted.\n");
2579 sb->s_flags |= MS_RDONLY;
2580 ocfs2_set_ro_flag(osb, 0);
2581 }
2582
2583 static char error_buf[1024];
2584
2585 void __ocfs2_error(struct super_block *sb,
2586 const char *function,
2587 const char *fmt, ...)
2588 {
2589 va_list args;
2590
2591 va_start(args, fmt);
2592 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2593 va_end(args);
2594
2595 /* Not using mlog here because we want to show the actual
2596 * function the error came from. */
2597 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2598 sb->s_id, function, error_buf);
2599
2600 ocfs2_handle_error(sb);
2601 }
2602
2603 /* Handle critical errors. This is intentionally more drastic than
2604 * ocfs2_handle_error, so we only use for things like journal errors,
2605 * etc. */
2606 void __ocfs2_abort(struct super_block* sb,
2607 const char *function,
2608 const char *fmt, ...)
2609 {
2610 va_list args;
2611
2612 va_start(args, fmt);
2613 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2614 va_end(args);
2615
2616 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2617 sb->s_id, function, error_buf);
2618
2619 /* We don't have the cluster support yet to go straight to
2620 * hard readonly in here. Until then, we want to keep
2621 * ocfs2_abort() so that we can at least mark critical
2622 * errors.
2623 *
2624 * TODO: This should abort the journal and alert other nodes
2625 * that our slot needs recovery. */
2626
2627 /* Force a panic(). This stinks, but it's better than letting
2628 * things continue without having a proper hard readonly
2629 * here. */
2630 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2631 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2632 ocfs2_handle_error(sb);
2633 }
2634
2635 /*
2636 * Void signal blockers, because in-kernel sigprocmask() only fails
2637 * when SIG_* is wrong.
2638 */
2639 void ocfs2_block_signals(sigset_t *oldset)
2640 {
2641 int rc;
2642 sigset_t blocked;
2643
2644 sigfillset(&blocked);
2645 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2646 BUG_ON(rc);
2647 }
2648
2649 void ocfs2_unblock_signals(sigset_t *oldset)
2650 {
2651 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2652 BUG_ON(rc);
2653 }
2654
2655 module_init(ocfs2_init);
2656 module_exit(ocfs2_exit);