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neigh: __rcu annotations
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / super.c
blob06d1f749ca8945264aded7f21c1c2b35285d52df
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
45 #define MLOG_MASK_PREFIX ML_SUPER
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 /* this should be the only file to include a version 1 header */
51 #include "ocfs1_fs_compat.h"
52
53 #include "alloc.h"
54 #include "blockcheck.h"
55 #include "dlmglue.h"
56 #include "export.h"
57 #include "extent_map.h"
58 #include "heartbeat.h"
59 #include "inode.h"
60 #include "journal.h"
61 #include "localalloc.h"
62 #include "namei.h"
63 #include "slot_map.h"
64 #include "super.h"
65 #include "sysfile.h"
66 #include "uptodate.h"
67 #include "ver.h"
68 #include "xattr.h"
69 #include "quota.h"
70 #include "refcounttree.h"
71 #include "suballoc.h"
72
73 #include "buffer_head_io.h"
74
75 static struct kmem_cache *ocfs2_inode_cachep = NULL;
76 struct kmem_cache *ocfs2_dquot_cachep;
77 struct kmem_cache *ocfs2_qf_chunk_cachep;
78
79 /* OCFS2 needs to schedule several differnt types of work which
80 * require cluster locking, disk I/O, recovery waits, etc. Since these
81 * types of work tend to be heavy we avoid using the kernel events
82 * workqueue and schedule on our own. */
83 struct workqueue_struct *ocfs2_wq = NULL;
84
85 static struct dentry *ocfs2_debugfs_root = NULL;
86
87 MODULE_AUTHOR("Oracle");
88 MODULE_LICENSE("GPL");
89
90 struct mount_options
91 {
92 unsigned long commit_interval;
93 unsigned long mount_opt;
94 unsigned int atime_quantum;
95 signed short slot;
96 int localalloc_opt;
97 unsigned int resv_level;
98 int dir_resv_level;
99 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
100 };
101
102 static int ocfs2_parse_options(struct super_block *sb, char *options,
103 struct mount_options *mopt,
104 int is_remount);
105 static int ocfs2_check_set_options(struct super_block *sb,
106 struct mount_options *options);
107 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
108 static void ocfs2_put_super(struct super_block *sb);
109 static int ocfs2_mount_volume(struct super_block *sb);
110 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
111 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
112 static int ocfs2_initialize_mem_caches(void);
113 static void ocfs2_free_mem_caches(void);
114 static void ocfs2_delete_osb(struct ocfs2_super *osb);
115
116 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
117
118 static int ocfs2_sync_fs(struct super_block *sb, int wait);
119
120 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
121 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
122 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
123 static int ocfs2_check_volume(struct ocfs2_super *osb);
124 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
125 struct buffer_head *bh,
126 u32 sectsize,
127 struct ocfs2_blockcheck_stats *stats);
128 static int ocfs2_initialize_super(struct super_block *sb,
129 struct buffer_head *bh,
130 int sector_size,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_get_sector(struct super_block *sb,
133 struct buffer_head **bh,
134 int block,
135 int sect_size);
136 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
137 static void ocfs2_destroy_inode(struct inode *inode);
138 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
139 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
140 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
141
142 static const struct super_operations ocfs2_sops = {
143 .statfs = ocfs2_statfs,
144 .alloc_inode = ocfs2_alloc_inode,
145 .destroy_inode = ocfs2_destroy_inode,
146 .drop_inode = ocfs2_drop_inode,
147 .evict_inode = ocfs2_evict_inode,
148 .sync_fs = ocfs2_sync_fs,
149 .put_super = ocfs2_put_super,
150 .remount_fs = ocfs2_remount,
151 .show_options = ocfs2_show_options,
152 .quota_read = ocfs2_quota_read,
153 .quota_write = ocfs2_quota_write,
154 };
155
156 enum {
157 Opt_barrier,
158 Opt_err_panic,
159 Opt_err_ro,
160 Opt_intr,
161 Opt_nointr,
162 Opt_hb_none,
163 Opt_hb_local,
164 Opt_hb_global,
165 Opt_data_ordered,
166 Opt_data_writeback,
167 Opt_atime_quantum,
168 Opt_slot,
169 Opt_commit,
170 Opt_localalloc,
171 Opt_localflocks,
172 Opt_stack,
173 Opt_user_xattr,
174 Opt_nouser_xattr,
175 Opt_inode64,
176 Opt_acl,
177 Opt_noacl,
178 Opt_usrquota,
179 Opt_grpquota,
180 Opt_coherency_buffered,
181 Opt_coherency_full,
182 Opt_resv_level,
183 Opt_dir_resv_level,
184 Opt_err,
185 };
186
187 static const match_table_t tokens = {
188 {Opt_barrier, "barrier=%u"},
189 {Opt_err_panic, "errors=panic"},
190 {Opt_err_ro, "errors=remount-ro"},
191 {Opt_intr, "intr"},
192 {Opt_nointr, "nointr"},
193 {Opt_hb_none, OCFS2_HB_NONE},
194 {Opt_hb_local, OCFS2_HB_LOCAL},
195 {Opt_hb_global, OCFS2_HB_GLOBAL},
196 {Opt_data_ordered, "data=ordered"},
197 {Opt_data_writeback, "data=writeback"},
198 {Opt_atime_quantum, "atime_quantum=%u"},
199 {Opt_slot, "preferred_slot=%u"},
200 {Opt_commit, "commit=%u"},
201 {Opt_localalloc, "localalloc=%d"},
202 {Opt_localflocks, "localflocks"},
203 {Opt_stack, "cluster_stack=%s"},
204 {Opt_user_xattr, "user_xattr"},
205 {Opt_nouser_xattr, "nouser_xattr"},
206 {Opt_inode64, "inode64"},
207 {Opt_acl, "acl"},
208 {Opt_noacl, "noacl"},
209 {Opt_usrquota, "usrquota"},
210 {Opt_grpquota, "grpquota"},
211 {Opt_coherency_buffered, "coherency=buffered"},
212 {Opt_coherency_full, "coherency=full"},
213 {Opt_resv_level, "resv_level=%u"},
214 {Opt_dir_resv_level, "dir_resv_level=%u"},
215 {Opt_err, NULL}
216 };
217
218 #ifdef CONFIG_DEBUG_FS
219 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
220 {
221 struct ocfs2_cluster_connection *cconn = osb->cconn;
222 struct ocfs2_recovery_map *rm = osb->recovery_map;
223 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
224 int i, out = 0;
225
226 out += snprintf(buf + out, len - out,
227 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
228 "Device", osb->dev_str, osb->uuid_str,
229 osb->fs_generation, osb->vol_label);
230
231 out += snprintf(buf + out, len - out,
232 "%10s => State: %d Flags: 0x%lX\n", "Volume",
233 atomic_read(&osb->vol_state), osb->osb_flags);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => Block: %lu Cluster: %d\n", "Sizes",
237 osb->sb->s_blocksize, osb->s_clustersize);
238
239 out += snprintf(buf + out, len - out,
240 "%10s => Compat: 0x%X Incompat: 0x%X "
241 "ROcompat: 0x%X\n",
242 "Features", osb->s_feature_compat,
243 osb->s_feature_incompat, osb->s_feature_ro_compat);
244
245 out += snprintf(buf + out, len - out,
246 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
247 osb->s_mount_opt, osb->s_atime_quantum);
248
249 if (cconn) {
250 out += snprintf(buf + out, len - out,
251 "%10s => Stack: %s Name: %*s "
252 "Version: %d.%d\n", "Cluster",
253 (*osb->osb_cluster_stack == '\0' ?
254 "o2cb" : osb->osb_cluster_stack),
255 cconn->cc_namelen, cconn->cc_name,
256 cconn->cc_version.pv_major,
257 cconn->cc_version.pv_minor);
258 }
259
260 spin_lock(&osb->dc_task_lock);
261 out += snprintf(buf + out, len - out,
262 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
263 "WorkSeq: %lu\n", "DownCnvt",
264 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
265 osb->blocked_lock_count, osb->dc_wake_sequence,
266 osb->dc_work_sequence);
267 spin_unlock(&osb->dc_task_lock);
268
269 spin_lock(&osb->osb_lock);
270 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
271 "Recovery",
272 (osb->recovery_thread_task ?
273 task_pid_nr(osb->recovery_thread_task) : -1));
274 if (rm->rm_used == 0)
275 out += snprintf(buf + out, len - out, " None\n");
276 else {
277 for (i = 0; i < rm->rm_used; i++)
278 out += snprintf(buf + out, len - out, " %d",
279 rm->rm_entries[i]);
280 out += snprintf(buf + out, len - out, "\n");
281 }
282 spin_unlock(&osb->osb_lock);
283
284 out += snprintf(buf + out, len - out,
285 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
286 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
287 osb->osb_commit_interval,
288 atomic_read(&osb->needs_checkpoint));
289
290 out += snprintf(buf + out, len - out,
291 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
292 "Journal", osb->journal->j_state,
293 osb->journal->j_trans_id,
294 atomic_read(&osb->journal->j_num_trans));
295
296 out += snprintf(buf + out, len - out,
297 "%10s => GlobalAllocs: %d LocalAllocs: %d "
298 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
299 "Stats",
300 atomic_read(&osb->alloc_stats.bitmap_data),
301 atomic_read(&osb->alloc_stats.local_data),
302 atomic_read(&osb->alloc_stats.bg_allocs),
303 atomic_read(&osb->alloc_stats.moves),
304 atomic_read(&osb->alloc_stats.bg_extends));
305
306 out += snprintf(buf + out, len - out,
307 "%10s => State: %u Descriptor: %llu Size: %u bits "
308 "Default: %u bits\n",
309 "LocalAlloc", osb->local_alloc_state,
310 (unsigned long long)osb->la_last_gd,
311 osb->local_alloc_bits, osb->local_alloc_default_bits);
312
313 spin_lock(&osb->osb_lock);
314 out += snprintf(buf + out, len - out,
315 "%10s => InodeSlot: %d StolenInodes: %d, "
316 "MetaSlot: %d StolenMeta: %d\n", "Steal",
317 osb->s_inode_steal_slot,
318 atomic_read(&osb->s_num_inodes_stolen),
319 osb->s_meta_steal_slot,
320 atomic_read(&osb->s_num_meta_stolen));
321 spin_unlock(&osb->osb_lock);
322
323 out += snprintf(buf + out, len - out, "OrphanScan => ");
324 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
325 os->os_count, os->os_seqno);
326 out += snprintf(buf + out, len - out, " Last Scan: ");
327 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
328 out += snprintf(buf + out, len - out, "Disabled\n");
329 else
330 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
331 (get_seconds() - os->os_scantime.tv_sec));
332
333 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
334 "Slots", "Num", "RecoGen");
335 for (i = 0; i < osb->max_slots; ++i) {
336 out += snprintf(buf + out, len - out,
337 "%10s %c %3d %10d\n",
338 " ",
339 (i == osb->slot_num ? '*' : ' '),
340 i, osb->slot_recovery_generations[i]);
341 }
342
343 return out;
344 }
345
346 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
347 {
348 struct ocfs2_super *osb = inode->i_private;
349 char *buf = NULL;
350
351 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
352 if (!buf)
353 goto bail;
354
355 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
356
357 file->private_data = buf;
358
359 return 0;
360 bail:
361 return -ENOMEM;
362 }
363
364 static int ocfs2_debug_release(struct inode *inode, struct file *file)
365 {
366 kfree(file->private_data);
367 return 0;
368 }
369
370 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
371 size_t nbytes, loff_t *ppos)
372 {
373 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
374 i_size_read(file->f_mapping->host));
375 }
376 #else
377 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
378 {
379 return 0;
380 }
381 static int ocfs2_debug_release(struct inode *inode, struct file *file)
382 {
383 return 0;
384 }
385 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
386 size_t nbytes, loff_t *ppos)
387 {
388 return 0;
389 }
390 #endif /* CONFIG_DEBUG_FS */
391
392 static const struct file_operations ocfs2_osb_debug_fops = {
393 .open = ocfs2_osb_debug_open,
394 .release = ocfs2_debug_release,
395 .read = ocfs2_debug_read,
396 .llseek = generic_file_llseek,
397 };
398
399 static int ocfs2_sync_fs(struct super_block *sb, int wait)
400 {
401 int status;
402 tid_t target;
403 struct ocfs2_super *osb = OCFS2_SB(sb);
404
405 if (ocfs2_is_hard_readonly(osb))
406 return -EROFS;
407
408 if (wait) {
409 status = ocfs2_flush_truncate_log(osb);
410 if (status < 0)
411 mlog_errno(status);
412 } else {
413 ocfs2_schedule_truncate_log_flush(osb, 0);
414 }
415
416 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
417 &target)) {
418 if (wait)
419 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
420 target);
421 }
422 return 0;
423 }
424
425 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
426 {
427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
428 && (ino == USER_QUOTA_SYSTEM_INODE
429 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
430 return 0;
431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
432 && (ino == GROUP_QUOTA_SYSTEM_INODE
433 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
434 return 0;
435 return 1;
436 }
437
438 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
439 {
440 struct inode *new = NULL;
441 int status = 0;
442 int i;
443
444 mlog_entry_void();
445
446 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
447 if (IS_ERR(new)) {
448 status = PTR_ERR(new);
449 mlog_errno(status);
450 goto bail;
451 }
452 osb->root_inode = new;
453
454 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
455 if (IS_ERR(new)) {
456 status = PTR_ERR(new);
457 mlog_errno(status);
458 goto bail;
459 }
460 osb->sys_root_inode = new;
461
462 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
463 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
464 if (!ocfs2_need_system_inode(osb, i))
465 continue;
466 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
467 if (!new) {
468 ocfs2_release_system_inodes(osb);
469 status = -EINVAL;
470 mlog_errno(status);
471 /* FIXME: Should ERROR_RO_FS */
472 mlog(ML_ERROR, "Unable to load system inode %d, "
473 "possibly corrupt fs?", i);
474 goto bail;
475 }
476 // the array now has one ref, so drop this one
477 iput(new);
478 }
479
480 bail:
481 mlog_exit(status);
482 return status;
483 }
484
485 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
486 {
487 struct inode *new = NULL;
488 int status = 0;
489 int i;
490
491 mlog_entry_void();
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 mlog_exit(status);
512 return status;
513 }
514
515 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
516 {
517 int i;
518 struct inode *inode;
519
520 mlog_entry_void();
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 goto out;
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 out:
556 mlog_exit(0);
557 }
558
559 /* We're allocating fs objects, use GFP_NOFS */
560 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
561 {
562 struct ocfs2_inode_info *oi;
563
564 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
565 if (!oi)
566 return NULL;
567
568 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
569 return &oi->vfs_inode;
570 }
571
572 static void ocfs2_i_callback(struct rcu_head *head)
573 {
574 struct inode *inode = container_of(head, struct inode, i_rcu);
575 INIT_LIST_HEAD(&inode->i_dentry);
576 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
577 }
578
579 static void ocfs2_destroy_inode(struct inode *inode)
580 {
581 call_rcu(&inode->i_rcu, ocfs2_i_callback);
582 }
583
584 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
585 unsigned int cbits)
586 {
587 unsigned int bytes = 1 << cbits;
588 unsigned int trim = bytes;
589 unsigned int bitshift = 32;
590
591 /*
592 * i_size and all block offsets in ocfs2 are always 64 bits
593 * wide. i_clusters is 32 bits, in cluster-sized units. So on
594 * 64 bit platforms, cluster size will be the limiting factor.
595 */
596
597 #if BITS_PER_LONG == 32
598 # if defined(CONFIG_LBDAF)
599 BUILD_BUG_ON(sizeof(sector_t) != 8);
600 /*
601 * We might be limited by page cache size.
602 */
603 if (bytes > PAGE_CACHE_SIZE) {
604 bytes = PAGE_CACHE_SIZE;
605 trim = 1;
606 /*
607 * Shift by 31 here so that we don't get larger than
608 * MAX_LFS_FILESIZE
609 */
610 bitshift = 31;
611 }
612 # else
613 /*
614 * We are limited by the size of sector_t. Use block size, as
615 * that's what we expose to the VFS.
616 */
617 bytes = 1 << bbits;
618 trim = 1;
619 bitshift = 31;
620 # endif
621 #endif
622
623 /*
624 * Trim by a whole cluster when we can actually approach the
625 * on-disk limits. Otherwise we can overflow i_clusters when
626 * an extent start is at the max offset.
627 */
628 return (((unsigned long long)bytes) << bitshift) - trim;
629 }
630
631 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
632 {
633 int incompat_features;
634 int ret = 0;
635 struct mount_options parsed_options;
636 struct ocfs2_super *osb = OCFS2_SB(sb);
637 u32 tmp;
638
639 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
640 !ocfs2_check_set_options(sb, &parsed_options)) {
641 ret = -EINVAL;
642 goto out;
643 }
644
645 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
646 OCFS2_MOUNT_HB_NONE;
647 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
648 ret = -EINVAL;
649 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
650 goto out;
651 }
652
653 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
654 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
655 ret = -EINVAL;
656 mlog(ML_ERROR, "Cannot change data mode on remount\n");
657 goto out;
658 }
659
660 /* Probably don't want this on remount; it might
661 * mess with other nodes */
662 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
663 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
664 ret = -EINVAL;
665 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
666 goto out;
667 }
668
669 /* We're going to/from readonly mode. */
670 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
671 /* Disable quota accounting before remounting RO */
672 if (*flags & MS_RDONLY) {
673 ret = ocfs2_susp_quotas(osb, 0);
674 if (ret < 0)
675 goto out;
676 }
677 /* Lock here so the check of HARD_RO and the potential
678 * setting of SOFT_RO is atomic. */
679 spin_lock(&osb->osb_lock);
680 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
681 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
682 ret = -EROFS;
683 goto unlock_osb;
684 }
685
686 if (*flags & MS_RDONLY) {
687 mlog(0, "Going to ro mode.\n");
688 sb->s_flags |= MS_RDONLY;
689 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
690 } else {
691 mlog(0, "Making ro filesystem writeable.\n");
692
693 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
694 mlog(ML_ERROR, "Cannot remount RDWR "
695 "filesystem due to previous errors.\n");
696 ret = -EROFS;
697 goto unlock_osb;
698 }
699 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
700 if (incompat_features) {
701 mlog(ML_ERROR, "Cannot remount RDWR because "
702 "of unsupported optional features "
703 "(%x).\n", incompat_features);
704 ret = -EINVAL;
705 goto unlock_osb;
706 }
707 sb->s_flags &= ~MS_RDONLY;
708 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
709 }
710 unlock_osb:
711 spin_unlock(&osb->osb_lock);
712 /* Enable quota accounting after remounting RW */
713 if (!ret && !(*flags & MS_RDONLY)) {
714 if (sb_any_quota_suspended(sb))
715 ret = ocfs2_susp_quotas(osb, 1);
716 else
717 ret = ocfs2_enable_quotas(osb);
718 if (ret < 0) {
719 /* Return back changes... */
720 spin_lock(&osb->osb_lock);
721 sb->s_flags |= MS_RDONLY;
722 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
723 spin_unlock(&osb->osb_lock);
724 goto out;
725 }
726 }
727 }
728
729 if (!ret) {
730 /* Only save off the new mount options in case of a successful
731 * remount. */
732 osb->s_mount_opt = parsed_options.mount_opt;
733 osb->s_atime_quantum = parsed_options.atime_quantum;
734 osb->preferred_slot = parsed_options.slot;
735 if (parsed_options.commit_interval)
736 osb->osb_commit_interval = parsed_options.commit_interval;
737
738 if (!ocfs2_is_hard_readonly(osb))
739 ocfs2_set_journal_params(osb);
740
741 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
742 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
743 MS_POSIXACL : 0);
744 }
745 out:
746 return ret;
747 }
748
749 static int ocfs2_sb_probe(struct super_block *sb,
750 struct buffer_head **bh,
751 int *sector_size,
752 struct ocfs2_blockcheck_stats *stats)
753 {
754 int status, tmpstat;
755 struct ocfs1_vol_disk_hdr *hdr;
756 struct ocfs2_dinode *di;
757 int blksize;
758
759 *bh = NULL;
760
761 /* may be > 512 */
762 *sector_size = bdev_logical_block_size(sb->s_bdev);
763 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
764 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
765 *sector_size, OCFS2_MAX_BLOCKSIZE);
766 status = -EINVAL;
767 goto bail;
768 }
769
770 /* Can this really happen? */
771 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
772 *sector_size = OCFS2_MIN_BLOCKSIZE;
773
774 /* check block zero for old format */
775 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
776 if (status < 0) {
777 mlog_errno(status);
778 goto bail;
779 }
780 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
781 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
782 mlog(ML_ERROR, "incompatible version: %u.%u\n",
783 hdr->major_version, hdr->minor_version);
784 status = -EINVAL;
785 }
786 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
787 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
788 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
789 hdr->signature);
790 status = -EINVAL;
791 }
792 brelse(*bh);
793 *bh = NULL;
794 if (status < 0) {
795 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
796 "upgraded before mounting with ocfs v2\n");
797 goto bail;
798 }
799
800 /*
801 * Now check at magic offset for 512, 1024, 2048, 4096
802 * blocksizes. 4096 is the maximum blocksize because it is
803 * the minimum clustersize.
804 */
805 status = -EINVAL;
806 for (blksize = *sector_size;
807 blksize <= OCFS2_MAX_BLOCKSIZE;
808 blksize <<= 1) {
809 tmpstat = ocfs2_get_sector(sb, bh,
810 OCFS2_SUPER_BLOCK_BLKNO,
811 blksize);
812 if (tmpstat < 0) {
813 status = tmpstat;
814 mlog_errno(status);
815 break;
816 }
817 di = (struct ocfs2_dinode *) (*bh)->b_data;
818 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
819 spin_lock_init(&stats->b_lock);
820 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
821 if (tmpstat < 0) {
822 brelse(*bh);
823 *bh = NULL;
824 }
825 if (tmpstat != -EAGAIN) {
826 status = tmpstat;
827 break;
828 }
829 }
830
831 bail:
832 return status;
833 }
834
835 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
836 {
837 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
838
839 if (osb->s_mount_opt & hb_enabled) {
840 if (ocfs2_mount_local(osb)) {
841 mlog(ML_ERROR, "Cannot heartbeat on a locally "
842 "mounted device.\n");
843 return -EINVAL;
844 }
845 if (ocfs2_userspace_stack(osb)) {
846 mlog(ML_ERROR, "Userspace stack expected, but "
847 "o2cb heartbeat arguments passed to mount\n");
848 return -EINVAL;
849 }
850 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
851 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
852 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
853 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
854 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
855 return -EINVAL;
856 }
857 }
858
859 if (!(osb->s_mount_opt & hb_enabled)) {
860 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
861 !ocfs2_userspace_stack(osb)) {
862 mlog(ML_ERROR, "Heartbeat has to be started to mount "
863 "a read-write clustered device.\n");
864 return -EINVAL;
865 }
866 }
867
868 return 0;
869 }
870
871 /*
872 * If we're using a userspace stack, mount should have passed
873 * a name that matches the disk. If not, mount should not
874 * have passed a stack.
875 */
876 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
877 struct mount_options *mopt)
878 {
879 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
880 mlog(ML_ERROR,
881 "cluster stack passed to mount, but this filesystem "
882 "does not support it\n");
883 return -EINVAL;
884 }
885
886 if (ocfs2_userspace_stack(osb) &&
887 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
888 OCFS2_STACK_LABEL_LEN)) {
889 mlog(ML_ERROR,
890 "cluster stack passed to mount (\"%s\") does not "
891 "match the filesystem (\"%s\")\n",
892 mopt->cluster_stack,
893 osb->osb_cluster_stack);
894 return -EINVAL;
895 }
896
897 return 0;
898 }
899
900 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
901 {
902 int type;
903 struct super_block *sb = osb->sb;
904 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
905 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
906 int status = 0;
907
908 for (type = 0; type < MAXQUOTAS; type++) {
909 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
910 continue;
911 if (unsuspend)
912 status = dquot_resume(sb, type);
913 else {
914 struct ocfs2_mem_dqinfo *oinfo;
915
916 /* Cancel periodic syncing before suspending */
917 oinfo = sb_dqinfo(sb, type)->dqi_priv;
918 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
919 status = dquot_suspend(sb, type);
920 }
921 if (status < 0)
922 break;
923 }
924 if (status < 0)
925 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
926 "remount (error = %d).\n", status);
927 return status;
928 }
929
930 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
931 {
932 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
933 struct super_block *sb = osb->sb;
934 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
935 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
936 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
937 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
938 int status;
939 int type;
940
941 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
942 for (type = 0; type < MAXQUOTAS; type++) {
943 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
944 continue;
945 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
946 osb->slot_num);
947 if (!inode[type]) {
948 status = -ENOENT;
949 goto out_quota_off;
950 }
951 status = dquot_enable(inode[type], type, QFMT_OCFS2,
952 DQUOT_USAGE_ENABLED);
953 if (status < 0)
954 goto out_quota_off;
955 }
956
957 for (type = 0; type < MAXQUOTAS; type++)
958 iput(inode[type]);
959 return 0;
960 out_quota_off:
961 ocfs2_disable_quotas(osb);
962 for (type = 0; type < MAXQUOTAS; type++)
963 iput(inode[type]);
964 mlog_errno(status);
965 return status;
966 }
967
968 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
969 {
970 int type;
971 struct inode *inode;
972 struct super_block *sb = osb->sb;
973 struct ocfs2_mem_dqinfo *oinfo;
974
975 /* We mostly ignore errors in this function because there's not much
976 * we can do when we see them */
977 for (type = 0; type < MAXQUOTAS; type++) {
978 if (!sb_has_quota_loaded(sb, type))
979 continue;
980 /* Cancel periodic syncing before we grab dqonoff_mutex */
981 oinfo = sb_dqinfo(sb, type)->dqi_priv;
982 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
983 inode = igrab(sb->s_dquot.files[type]);
984 /* Turn off quotas. This will remove all dquot structures from
985 * memory and so they will be automatically synced to global
986 * quota files */
987 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
988 DQUOT_LIMITS_ENABLED);
989 if (!inode)
990 continue;
991 iput(inode);
992 }
993 }
994
995 /* Handle quota on quotactl */
996 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
997 char *path)
998 {
999 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
1000 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
1001
1002 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
1003 return -EINVAL;
1004
1005 return dquot_enable(sb_dqopt(sb)->files[type], type,
1006 format_id, DQUOT_LIMITS_ENABLED);
1007 }
1008
1009 /* Handle quota off quotactl */
1010 static int ocfs2_quota_off(struct super_block *sb, int type)
1011 {
1012 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1013 }
1014
1015 static const struct quotactl_ops ocfs2_quotactl_ops = {
1016 .quota_on = ocfs2_quota_on,
1017 .quota_off = ocfs2_quota_off,
1018 .quota_sync = dquot_quota_sync,
1019 .get_info = dquot_get_dqinfo,
1020 .set_info = dquot_set_dqinfo,
1021 .get_dqblk = dquot_get_dqblk,
1022 .set_dqblk = dquot_set_dqblk,
1023 };
1024
1025 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1026 {
1027 struct dentry *root;
1028 int status, sector_size;
1029 struct mount_options parsed_options;
1030 struct inode *inode = NULL;
1031 struct ocfs2_super *osb = NULL;
1032 struct buffer_head *bh = NULL;
1033 char nodestr[8];
1034 struct ocfs2_blockcheck_stats stats;
1035
1036 mlog_entry("%p, %p, %i", sb, data, silent);
1037
1038 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1039 status = -EINVAL;
1040 goto read_super_error;
1041 }
1042
1043 /* probe for superblock */
1044 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1045 if (status < 0) {
1046 mlog(ML_ERROR, "superblock probe failed!\n");
1047 goto read_super_error;
1048 }
1049
1050 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1051 osb = OCFS2_SB(sb);
1052 if (status < 0) {
1053 mlog_errno(status);
1054 goto read_super_error;
1055 }
1056 brelse(bh);
1057 bh = NULL;
1058
1059 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1060 status = -EINVAL;
1061 goto read_super_error;
1062 }
1063 osb->s_mount_opt = parsed_options.mount_opt;
1064 osb->s_atime_quantum = parsed_options.atime_quantum;
1065 osb->preferred_slot = parsed_options.slot;
1066 osb->osb_commit_interval = parsed_options.commit_interval;
1067
1068 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1069 osb->osb_resv_level = parsed_options.resv_level;
1070 osb->osb_dir_resv_level = parsed_options.resv_level;
1071 if (parsed_options.dir_resv_level == -1)
1072 osb->osb_dir_resv_level = parsed_options.resv_level;
1073 else
1074 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1075
1076 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1077 if (status)
1078 goto read_super_error;
1079
1080 sb->s_magic = OCFS2_SUPER_MAGIC;
1081
1082 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1083 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1084
1085 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1086 * heartbeat=none */
1087 if (bdev_read_only(sb->s_bdev)) {
1088 if (!(sb->s_flags & MS_RDONLY)) {
1089 status = -EACCES;
1090 mlog(ML_ERROR, "Readonly device detected but readonly "
1091 "mount was not specified.\n");
1092 goto read_super_error;
1093 }
1094
1095 /* You should not be able to start a local heartbeat
1096 * on a readonly device. */
1097 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1098 status = -EROFS;
1099 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1100 "device.\n");
1101 goto read_super_error;
1102 }
1103
1104 status = ocfs2_check_journals_nolocks(osb);
1105 if (status < 0) {
1106 if (status == -EROFS)
1107 mlog(ML_ERROR, "Recovery required on readonly "
1108 "file system, but write access is "
1109 "unavailable.\n");
1110 else
1111 mlog_errno(status);
1112 goto read_super_error;
1113 }
1114
1115 ocfs2_set_ro_flag(osb, 1);
1116
1117 printk(KERN_NOTICE "Readonly device detected. No cluster "
1118 "services will be utilized for this mount. Recovery "
1119 "will be skipped.\n");
1120 }
1121
1122 if (!ocfs2_is_hard_readonly(osb)) {
1123 if (sb->s_flags & MS_RDONLY)
1124 ocfs2_set_ro_flag(osb, 0);
1125 }
1126
1127 status = ocfs2_verify_heartbeat(osb);
1128 if (status < 0) {
1129 mlog_errno(status);
1130 goto read_super_error;
1131 }
1132
1133 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1134 ocfs2_debugfs_root);
1135 if (!osb->osb_debug_root) {
1136 status = -EINVAL;
1137 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1138 goto read_super_error;
1139 }
1140
1141 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1142 osb->osb_debug_root,
1143 osb,
1144 &ocfs2_osb_debug_fops);
1145 if (!osb->osb_ctxt) {
1146 status = -EINVAL;
1147 mlog_errno(status);
1148 goto read_super_error;
1149 }
1150
1151 if (ocfs2_meta_ecc(osb)) {
1152 status = ocfs2_blockcheck_stats_debugfs_install(
1153 &osb->osb_ecc_stats,
1154 osb->osb_debug_root);
1155 if (status) {
1156 mlog(ML_ERROR,
1157 "Unable to create blockcheck statistics "
1158 "files\n");
1159 goto read_super_error;
1160 }
1161 }
1162
1163 status = ocfs2_mount_volume(sb);
1164 if (osb->root_inode)
1165 inode = igrab(osb->root_inode);
1166
1167 if (status < 0)
1168 goto read_super_error;
1169
1170 if (!inode) {
1171 status = -EIO;
1172 mlog_errno(status);
1173 goto read_super_error;
1174 }
1175
1176 root = d_alloc_root(inode);
1177 if (!root) {
1178 status = -ENOMEM;
1179 mlog_errno(status);
1180 goto read_super_error;
1181 }
1182
1183 sb->s_root = root;
1184
1185 ocfs2_complete_mount_recovery(osb);
1186
1187 if (ocfs2_mount_local(osb))
1188 snprintf(nodestr, sizeof(nodestr), "local");
1189 else
1190 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1191
1192 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1193 "with %s data mode.\n",
1194 osb->dev_str, nodestr, osb->slot_num,
1195 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1196 "ordered");
1197
1198 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1199 wake_up(&osb->osb_mount_event);
1200
1201 /* Now we can initialize quotas because we can afford to wait
1202 * for cluster locks recovery now. That also means that truncation
1203 * log recovery can happen but that waits for proper quota setup */
1204 if (!(sb->s_flags & MS_RDONLY)) {
1205 status = ocfs2_enable_quotas(osb);
1206 if (status < 0) {
1207 /* We have to err-out specially here because
1208 * s_root is already set */
1209 mlog_errno(status);
1210 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1211 wake_up(&osb->osb_mount_event);
1212 mlog_exit(status);
1213 return status;
1214 }
1215 }
1216
1217 ocfs2_complete_quota_recovery(osb);
1218
1219 /* Now we wake up again for processes waiting for quotas */
1220 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1221 wake_up(&osb->osb_mount_event);
1222
1223 /* Start this when the mount is almost sure of being successful */
1224 ocfs2_orphan_scan_start(osb);
1225
1226 mlog_exit(status);
1227 return status;
1228
1229 read_super_error:
1230 brelse(bh);
1231
1232 if (inode)
1233 iput(inode);
1234
1235 if (osb) {
1236 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1237 wake_up(&osb->osb_mount_event);
1238 ocfs2_dismount_volume(sb, 1);
1239 }
1240
1241 mlog_exit(status);
1242 return status;
1243 }
1244
1245 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1246 int flags,
1247 const char *dev_name,
1248 void *data)
1249 {
1250 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1251 }
1252
1253 static void ocfs2_kill_sb(struct super_block *sb)
1254 {
1255 struct ocfs2_super *osb = OCFS2_SB(sb);
1256
1257 /* Failed mount? */
1258 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1259 goto out;
1260
1261 /* Prevent further queueing of inode drop events */
1262 spin_lock(&dentry_list_lock);
1263 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1264 spin_unlock(&dentry_list_lock);
1265 /* Wait for work to finish and/or remove it */
1266 cancel_work_sync(&osb->dentry_lock_work);
1267 out:
1268 kill_block_super(sb);
1269 }
1270
1271 static struct file_system_type ocfs2_fs_type = {
1272 .owner = THIS_MODULE,
1273 .name = "ocfs2",
1274 .mount = ocfs2_mount,
1275 .kill_sb = ocfs2_kill_sb,
1276
1277 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1278 .next = NULL
1279 };
1280
1281 static int ocfs2_check_set_options(struct super_block *sb,
1282 struct mount_options *options)
1283 {
1284 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1285 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1286 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1287 mlog(ML_ERROR, "User quotas were requested, but this "
1288 "filesystem does not have the feature enabled.\n");
1289 return 0;
1290 }
1291 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1292 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1293 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1294 mlog(ML_ERROR, "Group quotas were requested, but this "
1295 "filesystem does not have the feature enabled.\n");
1296 return 0;
1297 }
1298 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1299 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1300 mlog(ML_ERROR, "ACL support requested but extended attributes "
1301 "feature is not enabled\n");
1302 return 0;
1303 }
1304 /* No ACL setting specified? Use XATTR feature... */
1305 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1306 OCFS2_MOUNT_NO_POSIX_ACL))) {
1307 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1308 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1309 else
1310 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1311 }
1312 return 1;
1313 }
1314
1315 static int ocfs2_parse_options(struct super_block *sb,
1316 char *options,
1317 struct mount_options *mopt,
1318 int is_remount)
1319 {
1320 int status;
1321 char *p;
1322 u32 tmp;
1323
1324 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1325 options ? options : "(none)");
1326
1327 mopt->commit_interval = 0;
1328 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1329 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1330 mopt->slot = OCFS2_INVALID_SLOT;
1331 mopt->localalloc_opt = -1;
1332 mopt->cluster_stack[0] = '\0';
1333 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1334 mopt->dir_resv_level = -1;
1335
1336 if (!options) {
1337 status = 1;
1338 goto bail;
1339 }
1340
1341 while ((p = strsep(&options, ",")) != NULL) {
1342 int token, option;
1343 substring_t args[MAX_OPT_ARGS];
1344
1345 if (!*p)
1346 continue;
1347
1348 token = match_token(p, tokens, args);
1349 switch (token) {
1350 case Opt_hb_local:
1351 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1352 break;
1353 case Opt_hb_none:
1354 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1355 break;
1356 case Opt_hb_global:
1357 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1358 break;
1359 case Opt_barrier:
1360 if (match_int(&args[0], &option)) {
1361 status = 0;
1362 goto bail;
1363 }
1364 if (option)
1365 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1366 else
1367 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1368 break;
1369 case Opt_intr:
1370 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1371 break;
1372 case Opt_nointr:
1373 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1374 break;
1375 case Opt_err_panic:
1376 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1377 break;
1378 case Opt_err_ro:
1379 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1380 break;
1381 case Opt_data_ordered:
1382 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1383 break;
1384 case Opt_data_writeback:
1385 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1386 break;
1387 case Opt_user_xattr:
1388 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1389 break;
1390 case Opt_nouser_xattr:
1391 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1392 break;
1393 case Opt_atime_quantum:
1394 if (match_int(&args[0], &option)) {
1395 status = 0;
1396 goto bail;
1397 }
1398 if (option >= 0)
1399 mopt->atime_quantum = option;
1400 break;
1401 case Opt_slot:
1402 option = 0;
1403 if (match_int(&args[0], &option)) {
1404 status = 0;
1405 goto bail;
1406 }
1407 if (option)
1408 mopt->slot = (s16)option;
1409 break;
1410 case Opt_commit:
1411 option = 0;
1412 if (match_int(&args[0], &option)) {
1413 status = 0;
1414 goto bail;
1415 }
1416 if (option < 0)
1417 return 0;
1418 if (option == 0)
1419 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1420 mopt->commit_interval = HZ * option;
1421 break;
1422 case Opt_localalloc:
1423 option = 0;
1424 if (match_int(&args[0], &option)) {
1425 status = 0;
1426 goto bail;
1427 }
1428 if (option >= 0)
1429 mopt->localalloc_opt = option;
1430 break;
1431 case Opt_localflocks:
1432 /*
1433 * Changing this during remount could race
1434 * flock() requests, or "unbalance" existing
1435 * ones (e.g., a lock is taken in one mode but
1436 * dropped in the other). If users care enough
1437 * to flip locking modes during remount, we
1438 * could add a "local" flag to individual
1439 * flock structures for proper tracking of
1440 * state.
1441 */
1442 if (!is_remount)
1443 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1444 break;
1445 case Opt_stack:
1446 /* Check both that the option we were passed
1447 * is of the right length and that it is a proper
1448 * string of the right length.
1449 */
1450 if (((args[0].to - args[0].from) !=
1451 OCFS2_STACK_LABEL_LEN) ||
1452 (strnlen(args[0].from,
1453 OCFS2_STACK_LABEL_LEN) !=
1454 OCFS2_STACK_LABEL_LEN)) {
1455 mlog(ML_ERROR,
1456 "Invalid cluster_stack option\n");
1457 status = 0;
1458 goto bail;
1459 }
1460 memcpy(mopt->cluster_stack, args[0].from,
1461 OCFS2_STACK_LABEL_LEN);
1462 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
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 /* Ensure only one heartbeat mode */
1519 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
1520 OCFS2_MOUNT_HB_NONE);
1521 if (hweight32(tmp) != 1) {
1522 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1523 status = 0;
1524 goto bail;
1525 }
1526
1527 status = 1;
1528
1529 bail:
1530 mlog_exit(status);
1531 return status;
1532 }
1533
1534 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1535 {
1536 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1537 unsigned long opts = osb->s_mount_opt;
1538 unsigned int local_alloc_megs;
1539
1540 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1541 seq_printf(s, ",_netdev");
1542 if (opts & OCFS2_MOUNT_HB_LOCAL)
1543 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1544 else
1545 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1546 } else
1547 seq_printf(s, ",%s", OCFS2_HB_NONE);
1548
1549 if (opts & OCFS2_MOUNT_NOINTR)
1550 seq_printf(s, ",nointr");
1551
1552 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1553 seq_printf(s, ",data=writeback");
1554 else
1555 seq_printf(s, ",data=ordered");
1556
1557 if (opts & OCFS2_MOUNT_BARRIER)
1558 seq_printf(s, ",barrier=1");
1559
1560 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1561 seq_printf(s, ",errors=panic");
1562 else
1563 seq_printf(s, ",errors=remount-ro");
1564
1565 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1566 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1567
1568 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1569 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1570
1571 if (osb->osb_commit_interval)
1572 seq_printf(s, ",commit=%u",
1573 (unsigned) (osb->osb_commit_interval / HZ));
1574
1575 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1576 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1577 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1578
1579 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1580 seq_printf(s, ",localflocks,");
1581
1582 if (osb->osb_cluster_stack[0])
1583 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1584 osb->osb_cluster_stack);
1585 if (opts & OCFS2_MOUNT_USRQUOTA)
1586 seq_printf(s, ",usrquota");
1587 if (opts & OCFS2_MOUNT_GRPQUOTA)
1588 seq_printf(s, ",grpquota");
1589
1590 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1591 seq_printf(s, ",coherency=buffered");
1592 else
1593 seq_printf(s, ",coherency=full");
1594
1595 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1596 seq_printf(s, ",nouser_xattr");
1597 else
1598 seq_printf(s, ",user_xattr");
1599
1600 if (opts & OCFS2_MOUNT_INODE64)
1601 seq_printf(s, ",inode64");
1602
1603 if (opts & OCFS2_MOUNT_POSIX_ACL)
1604 seq_printf(s, ",acl");
1605 else
1606 seq_printf(s, ",noacl");
1607
1608 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1609 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1610
1611 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1612 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1613
1614 return 0;
1615 }
1616
1617 static int __init ocfs2_init(void)
1618 {
1619 int status;
1620
1621 mlog_entry_void();
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 status = ocfs2_quota_setup();
1650 if (status)
1651 goto leave;
1652
1653 ocfs2_set_locking_protocol();
1654
1655 status = register_quota_format(&ocfs2_quota_format);
1656 leave:
1657 if (status < 0) {
1658 ocfs2_quota_shutdown();
1659 ocfs2_free_mem_caches();
1660 exit_ocfs2_uptodate_cache();
1661 }
1662
1663 mlog_exit(status);
1664
1665 if (status >= 0) {
1666 return register_filesystem(&ocfs2_fs_type);
1667 } else
1668 return -1;
1669 }
1670
1671 static void __exit ocfs2_exit(void)
1672 {
1673 mlog_entry_void();
1674
1675 ocfs2_quota_shutdown();
1676
1677 if (ocfs2_wq) {
1678 flush_workqueue(ocfs2_wq);
1679 destroy_workqueue(ocfs2_wq);
1680 }
1681
1682 unregister_quota_format(&ocfs2_quota_format);
1683
1684 debugfs_remove(ocfs2_debugfs_root);
1685
1686 ocfs2_free_mem_caches();
1687
1688 unregister_filesystem(&ocfs2_fs_type);
1689
1690 exit_ocfs2_uptodate_cache();
1691
1692 mlog_exit_void();
1693 }
1694
1695 static void ocfs2_put_super(struct super_block *sb)
1696 {
1697 mlog_entry("(0x%p)\n", sb);
1698
1699 ocfs2_sync_blockdev(sb);
1700 ocfs2_dismount_volume(sb, 0);
1701
1702 mlog_exit_void();
1703 }
1704
1705 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1706 {
1707 struct ocfs2_super *osb;
1708 u32 numbits, freebits;
1709 int status;
1710 struct ocfs2_dinode *bm_lock;
1711 struct buffer_head *bh = NULL;
1712 struct inode *inode = NULL;
1713
1714 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1715
1716 osb = OCFS2_SB(dentry->d_sb);
1717
1718 inode = ocfs2_get_system_file_inode(osb,
1719 GLOBAL_BITMAP_SYSTEM_INODE,
1720 OCFS2_INVALID_SLOT);
1721 if (!inode) {
1722 mlog(ML_ERROR, "failed to get bitmap inode\n");
1723 status = -EIO;
1724 goto bail;
1725 }
1726
1727 status = ocfs2_inode_lock(inode, &bh, 0);
1728 if (status < 0) {
1729 mlog_errno(status);
1730 goto bail;
1731 }
1732
1733 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1734
1735 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1736 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1737
1738 buf->f_type = OCFS2_SUPER_MAGIC;
1739 buf->f_bsize = dentry->d_sb->s_blocksize;
1740 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1741 buf->f_blocks = ((sector_t) numbits) *
1742 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1743 buf->f_bfree = ((sector_t) freebits) *
1744 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1745 buf->f_bavail = buf->f_bfree;
1746 buf->f_files = numbits;
1747 buf->f_ffree = freebits;
1748 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1749 & 0xFFFFFFFFUL;
1750 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1751 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1752
1753 brelse(bh);
1754
1755 ocfs2_inode_unlock(inode, 0);
1756 status = 0;
1757 bail:
1758 if (inode)
1759 iput(inode);
1760
1761 mlog_exit(status);
1762
1763 return status;
1764 }
1765
1766 static void ocfs2_inode_init_once(void *data)
1767 {
1768 struct ocfs2_inode_info *oi = data;
1769
1770 oi->ip_flags = 0;
1771 oi->ip_open_count = 0;
1772 spin_lock_init(&oi->ip_lock);
1773 ocfs2_extent_map_init(&oi->vfs_inode);
1774 INIT_LIST_HEAD(&oi->ip_io_markers);
1775 oi->ip_dir_start_lookup = 0;
1776
1777 init_rwsem(&oi->ip_alloc_sem);
1778 init_rwsem(&oi->ip_xattr_sem);
1779 mutex_init(&oi->ip_io_mutex);
1780
1781 oi->ip_blkno = 0ULL;
1782 oi->ip_clusters = 0;
1783
1784 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1785
1786 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1787 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1788 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1789
1790 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1791 &ocfs2_inode_caching_ops);
1792
1793 inode_init_once(&oi->vfs_inode);
1794 }
1795
1796 static int ocfs2_initialize_mem_caches(void)
1797 {
1798 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1799 sizeof(struct ocfs2_inode_info),
1800 0,
1801 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1802 SLAB_MEM_SPREAD),
1803 ocfs2_inode_init_once);
1804 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1805 sizeof(struct ocfs2_dquot),
1806 0,
1807 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1808 SLAB_MEM_SPREAD),
1809 NULL);
1810 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1811 sizeof(struct ocfs2_quota_chunk),
1812 0,
1813 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1814 NULL);
1815 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1816 !ocfs2_qf_chunk_cachep) {
1817 if (ocfs2_inode_cachep)
1818 kmem_cache_destroy(ocfs2_inode_cachep);
1819 if (ocfs2_dquot_cachep)
1820 kmem_cache_destroy(ocfs2_dquot_cachep);
1821 if (ocfs2_qf_chunk_cachep)
1822 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1823 return -ENOMEM;
1824 }
1825
1826 return 0;
1827 }
1828
1829 static void ocfs2_free_mem_caches(void)
1830 {
1831 if (ocfs2_inode_cachep)
1832 kmem_cache_destroy(ocfs2_inode_cachep);
1833 ocfs2_inode_cachep = NULL;
1834
1835 if (ocfs2_dquot_cachep)
1836 kmem_cache_destroy(ocfs2_dquot_cachep);
1837 ocfs2_dquot_cachep = NULL;
1838
1839 if (ocfs2_qf_chunk_cachep)
1840 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1841 ocfs2_qf_chunk_cachep = NULL;
1842 }
1843
1844 static int ocfs2_get_sector(struct super_block *sb,
1845 struct buffer_head **bh,
1846 int block,
1847 int sect_size)
1848 {
1849 if (!sb_set_blocksize(sb, sect_size)) {
1850 mlog(ML_ERROR, "unable to set blocksize\n");
1851 return -EIO;
1852 }
1853
1854 *bh = sb_getblk(sb, block);
1855 if (!*bh) {
1856 mlog_errno(-EIO);
1857 return -EIO;
1858 }
1859 lock_buffer(*bh);
1860 if (!buffer_dirty(*bh))
1861 clear_buffer_uptodate(*bh);
1862 unlock_buffer(*bh);
1863 ll_rw_block(READ, 1, bh);
1864 wait_on_buffer(*bh);
1865 if (!buffer_uptodate(*bh)) {
1866 mlog_errno(-EIO);
1867 brelse(*bh);
1868 *bh = NULL;
1869 return -EIO;
1870 }
1871
1872 return 0;
1873 }
1874
1875 static int ocfs2_mount_volume(struct super_block *sb)
1876 {
1877 int status = 0;
1878 int unlock_super = 0;
1879 struct ocfs2_super *osb = OCFS2_SB(sb);
1880
1881 mlog_entry_void();
1882
1883 if (ocfs2_is_hard_readonly(osb))
1884 goto leave;
1885
1886 status = ocfs2_dlm_init(osb);
1887 if (status < 0) {
1888 mlog_errno(status);
1889 goto leave;
1890 }
1891
1892 status = ocfs2_super_lock(osb, 1);
1893 if (status < 0) {
1894 mlog_errno(status);
1895 goto leave;
1896 }
1897 unlock_super = 1;
1898
1899 /* This will load up the node map and add ourselves to it. */
1900 status = ocfs2_find_slot(osb);
1901 if (status < 0) {
1902 mlog_errno(status);
1903 goto leave;
1904 }
1905
1906 /* load all node-local system inodes */
1907 status = ocfs2_init_local_system_inodes(osb);
1908 if (status < 0) {
1909 mlog_errno(status);
1910 goto leave;
1911 }
1912
1913 status = ocfs2_check_volume(osb);
1914 if (status < 0) {
1915 mlog_errno(status);
1916 goto leave;
1917 }
1918
1919 status = ocfs2_truncate_log_init(osb);
1920 if (status < 0)
1921 mlog_errno(status);
1922
1923 leave:
1924 if (unlock_super)
1925 ocfs2_super_unlock(osb, 1);
1926
1927 mlog_exit(status);
1928 return status;
1929 }
1930
1931 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1932 {
1933 int tmp, hangup_needed = 0;
1934 struct ocfs2_super *osb = NULL;
1935 char nodestr[8];
1936
1937 mlog_entry("(0x%p)\n", sb);
1938
1939 BUG_ON(!sb);
1940 osb = OCFS2_SB(sb);
1941 BUG_ON(!osb);
1942
1943 debugfs_remove(osb->osb_ctxt);
1944
1945 /*
1946 * Flush inode dropping work queue so that deletes are
1947 * performed while the filesystem is still working
1948 */
1949 ocfs2_drop_all_dl_inodes(osb);
1950
1951 /* Orphan scan should be stopped as early as possible */
1952 ocfs2_orphan_scan_stop(osb);
1953
1954 ocfs2_disable_quotas(osb);
1955
1956 ocfs2_shutdown_local_alloc(osb);
1957
1958 ocfs2_truncate_log_shutdown(osb);
1959
1960 /* This will disable recovery and flush any recovery work. */
1961 ocfs2_recovery_exit(osb);
1962
1963 ocfs2_journal_shutdown(osb);
1964
1965 ocfs2_sync_blockdev(sb);
1966
1967 ocfs2_purge_refcount_trees(osb);
1968
1969 /* No cluster connection means we've failed during mount, so skip
1970 * all the steps which depended on that to complete. */
1971 if (osb->cconn) {
1972 tmp = ocfs2_super_lock(osb, 1);
1973 if (tmp < 0) {
1974 mlog_errno(tmp);
1975 return;
1976 }
1977 }
1978
1979 if (osb->slot_num != OCFS2_INVALID_SLOT)
1980 ocfs2_put_slot(osb);
1981
1982 if (osb->cconn)
1983 ocfs2_super_unlock(osb, 1);
1984
1985 ocfs2_release_system_inodes(osb);
1986
1987 /*
1988 * If we're dismounting due to mount error, mount.ocfs2 will clean
1989 * up heartbeat. If we're a local mount, there is no heartbeat.
1990 * If we failed before we got a uuid_str yet, we can't stop
1991 * heartbeat. Otherwise, do it.
1992 */
1993 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1994 hangup_needed = 1;
1995
1996 if (osb->cconn)
1997 ocfs2_dlm_shutdown(osb, hangup_needed);
1998
1999 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
2000 debugfs_remove(osb->osb_debug_root);
2001
2002 if (hangup_needed)
2003 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
2004
2005 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
2006
2007 if (ocfs2_mount_local(osb))
2008 snprintf(nodestr, sizeof(nodestr), "local");
2009 else
2010 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2011
2012 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2013 osb->dev_str, nodestr);
2014
2015 ocfs2_delete_osb(osb);
2016 kfree(osb);
2017 sb->s_dev = 0;
2018 sb->s_fs_info = NULL;
2019 }
2020
2021 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2022 unsigned uuid_bytes)
2023 {
2024 int i, ret;
2025 char *ptr;
2026
2027 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2028
2029 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2030 if (osb->uuid_str == NULL)
2031 return -ENOMEM;
2032
2033 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2034 /* print with null */
2035 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2036 if (ret != 2) /* drop super cleans up */
2037 return -EINVAL;
2038 /* then only advance past the last char */
2039 ptr += 2;
2040 }
2041
2042 return 0;
2043 }
2044
2045 /* Make sure entire volume is addressable by our journal. Requires
2046 osb_clusters_at_boot to be valid and for the journal to have been
2047 initialized by ocfs2_journal_init(). */
2048 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2049 {
2050 int status = 0;
2051 u64 max_block =
2052 ocfs2_clusters_to_blocks(osb->sb,
2053 osb->osb_clusters_at_boot) - 1;
2054
2055 /* 32-bit block number is always OK. */
2056 if (max_block <= (u32)~0ULL)
2057 goto out;
2058
2059 /* Volume is "huge", so see if our journal is new enough to
2060 support it. */
2061 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2062 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2063 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2064 JBD2_FEATURE_INCOMPAT_64BIT))) {
2065 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2066 "Enable the 'block64' journal option with tunefs.ocfs2");
2067 status = -EFBIG;
2068 goto out;
2069 }
2070
2071 out:
2072 return status;
2073 }
2074
2075 static int ocfs2_initialize_super(struct super_block *sb,
2076 struct buffer_head *bh,
2077 int sector_size,
2078 struct ocfs2_blockcheck_stats *stats)
2079 {
2080 int status;
2081 int i, cbits, bbits;
2082 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2083 struct inode *inode = NULL;
2084 struct ocfs2_journal *journal;
2085 __le32 uuid_net_key;
2086 struct ocfs2_super *osb;
2087 u64 total_blocks;
2088
2089 mlog_entry_void();
2090
2091 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2092 if (!osb) {
2093 status = -ENOMEM;
2094 mlog_errno(status);
2095 goto bail;
2096 }
2097
2098 sb->s_fs_info = osb;
2099 sb->s_op = &ocfs2_sops;
2100 sb->s_d_op = &ocfs2_dentry_ops;
2101 sb->s_export_op = &ocfs2_export_ops;
2102 sb->s_qcop = &ocfs2_quotactl_ops;
2103 sb->dq_op = &ocfs2_quota_operations;
2104 sb->s_xattr = ocfs2_xattr_handlers;
2105 sb->s_time_gran = 1;
2106 sb->s_flags |= MS_NOATIME;
2107 /* this is needed to support O_LARGEFILE */
2108 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2109 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2110 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2111
2112 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2113
2114 for (i = 0; i < 3; i++)
2115 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2116 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2117
2118 osb->sb = sb;
2119 /* Save off for ocfs2_rw_direct */
2120 osb->s_sectsize_bits = blksize_bits(sector_size);
2121 BUG_ON(!osb->s_sectsize_bits);
2122
2123 spin_lock_init(&osb->dc_task_lock);
2124 init_waitqueue_head(&osb->dc_event);
2125 osb->dc_work_sequence = 0;
2126 osb->dc_wake_sequence = 0;
2127 INIT_LIST_HEAD(&osb->blocked_lock_list);
2128 osb->blocked_lock_count = 0;
2129 spin_lock_init(&osb->osb_lock);
2130 spin_lock_init(&osb->osb_xattr_lock);
2131 ocfs2_init_steal_slots(osb);
2132
2133 atomic_set(&osb->alloc_stats.moves, 0);
2134 atomic_set(&osb->alloc_stats.local_data, 0);
2135 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2136 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2137 atomic_set(&osb->alloc_stats.bg_extends, 0);
2138
2139 /* Copy the blockcheck stats from the superblock probe */
2140 osb->osb_ecc_stats = *stats;
2141
2142 ocfs2_init_node_maps(osb);
2143
2144 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2145 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2146
2147 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2148 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2149 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2150 osb->max_slots);
2151 status = -EINVAL;
2152 goto bail;
2153 }
2154 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2155
2156 ocfs2_orphan_scan_init(osb);
2157
2158 status = ocfs2_recovery_init(osb);
2159 if (status) {
2160 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2161 mlog_errno(status);
2162 goto bail;
2163 }
2164
2165 init_waitqueue_head(&osb->checkpoint_event);
2166 atomic_set(&osb->needs_checkpoint, 0);
2167
2168 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2169
2170 osb->slot_num = OCFS2_INVALID_SLOT;
2171
2172 osb->s_xattr_inline_size = le16_to_cpu(
2173 di->id2.i_super.s_xattr_inline_size);
2174
2175 osb->local_alloc_state = OCFS2_LA_UNUSED;
2176 osb->local_alloc_bh = NULL;
2177 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2178
2179 init_waitqueue_head(&osb->osb_mount_event);
2180
2181 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2182 if (status) {
2183 mlog_errno(status);
2184 goto bail;
2185 }
2186
2187 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2188 if (!osb->vol_label) {
2189 mlog(ML_ERROR, "unable to alloc vol label\n");
2190 status = -ENOMEM;
2191 goto bail;
2192 }
2193
2194 osb->slot_recovery_generations =
2195 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2196 GFP_KERNEL);
2197 if (!osb->slot_recovery_generations) {
2198 status = -ENOMEM;
2199 mlog_errno(status);
2200 goto bail;
2201 }
2202
2203 init_waitqueue_head(&osb->osb_wipe_event);
2204 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2205 sizeof(*osb->osb_orphan_wipes),
2206 GFP_KERNEL);
2207 if (!osb->osb_orphan_wipes) {
2208 status = -ENOMEM;
2209 mlog_errno(status);
2210 goto bail;
2211 }
2212
2213 osb->osb_rf_lock_tree = RB_ROOT;
2214
2215 osb->s_feature_compat =
2216 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2217 osb->s_feature_ro_compat =
2218 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2219 osb->s_feature_incompat =
2220 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2221
2222 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2223 mlog(ML_ERROR, "couldn't mount because of unsupported "
2224 "optional features (%x).\n", i);
2225 status = -EINVAL;
2226 goto bail;
2227 }
2228 if (!(osb->sb->s_flags & MS_RDONLY) &&
2229 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2230 mlog(ML_ERROR, "couldn't mount RDWR because of "
2231 "unsupported optional features (%x).\n", i);
2232 status = -EINVAL;
2233 goto bail;
2234 }
2235
2236 if (ocfs2_clusterinfo_valid(osb)) {
2237 osb->osb_stackflags =
2238 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2239 memcpy(osb->osb_cluster_stack,
2240 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2241 OCFS2_STACK_LABEL_LEN);
2242 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2243 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2244 mlog(ML_ERROR,
2245 "couldn't mount because of an invalid "
2246 "cluster stack label (%s) \n",
2247 osb->osb_cluster_stack);
2248 status = -EINVAL;
2249 goto bail;
2250 }
2251 } else {
2252 /* The empty string is identical with classic tools that
2253 * don't know about s_cluster_info. */
2254 osb->osb_cluster_stack[0] = '\0';
2255 }
2256
2257 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2258
2259 /* FIXME
2260 * This should be done in ocfs2_journal_init(), but unknown
2261 * ordering issues will cause the filesystem to crash.
2262 * If anyone wants to figure out what part of the code
2263 * refers to osb->journal before ocfs2_journal_init() is run,
2264 * be my guest.
2265 */
2266 /* initialize our journal structure */
2267
2268 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2269 if (!journal) {
2270 mlog(ML_ERROR, "unable to alloc journal\n");
2271 status = -ENOMEM;
2272 goto bail;
2273 }
2274 osb->journal = journal;
2275 journal->j_osb = osb;
2276
2277 atomic_set(&journal->j_num_trans, 0);
2278 init_rwsem(&journal->j_trans_barrier);
2279 init_waitqueue_head(&journal->j_checkpointed);
2280 spin_lock_init(&journal->j_lock);
2281 journal->j_trans_id = (unsigned long) 1;
2282 INIT_LIST_HEAD(&journal->j_la_cleanups);
2283 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2284 journal->j_state = OCFS2_JOURNAL_FREE;
2285
2286 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2287 osb->dentry_lock_list = NULL;
2288
2289 /* get some pseudo constants for clustersize bits */
2290 osb->s_clustersize_bits =
2291 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2292 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2293 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2294
2295 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2296 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2297 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2298 osb->s_clustersize);
2299 status = -EINVAL;
2300 goto bail;
2301 }
2302
2303 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2304 le32_to_cpu(di->i_clusters));
2305
2306 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2307 total_blocks);
2308 if (status) {
2309 mlog(ML_ERROR, "Volume too large "
2310 "to mount safely on this system");
2311 status = -EFBIG;
2312 goto bail;
2313 }
2314
2315 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2316 sizeof(di->id2.i_super.s_uuid))) {
2317 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2318 status = -ENOMEM;
2319 goto bail;
2320 }
2321
2322 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2323
2324 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2325 osb->vol_label[63] = '\0';
2326 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2327 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2328 osb->first_cluster_group_blkno =
2329 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2330 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2331 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2332 mlog(0, "vol_label: %s\n", osb->vol_label);
2333 mlog(0, "uuid: %s\n", osb->uuid_str);
2334 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2335 (unsigned long long)osb->root_blkno,
2336 (unsigned long long)osb->system_dir_blkno);
2337
2338 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2339 if (!osb->osb_dlm_debug) {
2340 status = -ENOMEM;
2341 mlog_errno(status);
2342 goto bail;
2343 }
2344
2345 atomic_set(&osb->vol_state, VOLUME_INIT);
2346
2347 /* load root, system_dir, and all global system inodes */
2348 status = ocfs2_init_global_system_inodes(osb);
2349 if (status < 0) {
2350 mlog_errno(status);
2351 goto bail;
2352 }
2353
2354 /*
2355 * global bitmap
2356 */
2357 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2358 OCFS2_INVALID_SLOT);
2359 if (!inode) {
2360 status = -EINVAL;
2361 mlog_errno(status);
2362 goto bail;
2363 }
2364
2365 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2366 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2367 iput(inode);
2368
2369 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2370 osb->s_feature_incompat) * 8;
2371
2372 status = ocfs2_init_slot_info(osb);
2373 if (status < 0) {
2374 mlog_errno(status);
2375 goto bail;
2376 }
2377
2378 bail:
2379 mlog_exit(status);
2380 return status;
2381 }
2382
2383 /*
2384 * will return: -EAGAIN if it is ok to keep searching for superblocks
2385 * -EINVAL if there is a bad superblock
2386 * 0 on success
2387 */
2388 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2389 struct buffer_head *bh,
2390 u32 blksz,
2391 struct ocfs2_blockcheck_stats *stats)
2392 {
2393 int status = -EAGAIN;
2394
2395 mlog_entry_void();
2396
2397 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2398 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2399 /* We have to do a raw check of the feature here */
2400 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2401 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2402 status = ocfs2_block_check_validate(bh->b_data,
2403 bh->b_size,
2404 &di->i_check,
2405 stats);
2406 if (status)
2407 goto out;
2408 }
2409 status = -EINVAL;
2410 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2411 mlog(ML_ERROR, "found superblock with incorrect block "
2412 "size: found %u, should be %u\n",
2413 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2414 blksz);
2415 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2416 OCFS2_MAJOR_REV_LEVEL ||
2417 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2418 OCFS2_MINOR_REV_LEVEL) {
2419 mlog(ML_ERROR, "found superblock with bad version: "
2420 "found %u.%u, should be %u.%u\n",
2421 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2422 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2423 OCFS2_MAJOR_REV_LEVEL,
2424 OCFS2_MINOR_REV_LEVEL);
2425 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2426 mlog(ML_ERROR, "bad block number on superblock: "
2427 "found %llu, should be %llu\n",
2428 (unsigned long long)le64_to_cpu(di->i_blkno),
2429 (unsigned long long)bh->b_blocknr);
2430 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2431 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2432 mlog(ML_ERROR, "bad cluster size found: %u\n",
2433 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2434 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2435 mlog(ML_ERROR, "bad root_blkno: 0\n");
2436 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2437 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2438 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2439 mlog(ML_ERROR,
2440 "Superblock slots found greater than file system "
2441 "maximum: found %u, max %u\n",
2442 le16_to_cpu(di->id2.i_super.s_max_slots),
2443 OCFS2_MAX_SLOTS);
2444 } else {
2445 /* found it! */
2446 status = 0;
2447 }
2448 }
2449
2450 out:
2451 mlog_exit(status);
2452 return status;
2453 }
2454
2455 static int ocfs2_check_volume(struct ocfs2_super *osb)
2456 {
2457 int status;
2458 int dirty;
2459 int local;
2460 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2461 * recover
2462 * ourselves. */
2463
2464 mlog_entry_void();
2465
2466 /* Init our journal object. */
2467 status = ocfs2_journal_init(osb->journal, &dirty);
2468 if (status < 0) {
2469 mlog(ML_ERROR, "Could not initialize journal!\n");
2470 goto finally;
2471 }
2472
2473 /* Now that journal has been initialized, check to make sure
2474 entire volume is addressable. */
2475 status = ocfs2_journal_addressable(osb);
2476 if (status)
2477 goto finally;
2478
2479 /* If the journal was unmounted cleanly then we don't want to
2480 * recover anything. Otherwise, journal_load will do that
2481 * dirty work for us :) */
2482 if (!dirty) {
2483 status = ocfs2_journal_wipe(osb->journal, 0);
2484 if (status < 0) {
2485 mlog_errno(status);
2486 goto finally;
2487 }
2488 } else {
2489 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2490 "recovering volume.\n");
2491 }
2492
2493 local = ocfs2_mount_local(osb);
2494
2495 /* will play back anything left in the journal. */
2496 status = ocfs2_journal_load(osb->journal, local, dirty);
2497 if (status < 0) {
2498 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2499 goto finally;
2500 }
2501
2502 if (dirty) {
2503 /* recover my local alloc if we didn't unmount cleanly. */
2504 status = ocfs2_begin_local_alloc_recovery(osb,
2505 osb->slot_num,
2506 &local_alloc);
2507 if (status < 0) {
2508 mlog_errno(status);
2509 goto finally;
2510 }
2511 /* we complete the recovery process after we've marked
2512 * ourselves as mounted. */
2513 }
2514
2515 mlog(0, "Journal loaded.\n");
2516
2517 status = ocfs2_load_local_alloc(osb);
2518 if (status < 0) {
2519 mlog_errno(status);
2520 goto finally;
2521 }
2522
2523 if (dirty) {
2524 /* Recovery will be completed after we've mounted the
2525 * rest of the volume. */
2526 osb->dirty = 1;
2527 osb->local_alloc_copy = local_alloc;
2528 local_alloc = NULL;
2529 }
2530
2531 /* go through each journal, trylock it and if you get the
2532 * lock, and it's marked as dirty, set the bit in the recover
2533 * map and launch a recovery thread for it. */
2534 status = ocfs2_mark_dead_nodes(osb);
2535 if (status < 0) {
2536 mlog_errno(status);
2537 goto finally;
2538 }
2539
2540 status = ocfs2_compute_replay_slots(osb);
2541 if (status < 0)
2542 mlog_errno(status);
2543
2544 finally:
2545 if (local_alloc)
2546 kfree(local_alloc);
2547
2548 mlog_exit(status);
2549 return status;
2550 }
2551
2552 /*
2553 * The routine gets called from dismount or close whenever a dismount on
2554 * volume is requested and the osb open count becomes 1.
2555 * It will remove the osb from the global list and also free up all the
2556 * initialized resources and fileobject.
2557 */
2558 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2559 {
2560 mlog_entry_void();
2561
2562 /* This function assumes that the caller has the main osb resource */
2563
2564 ocfs2_free_slot_info(osb);
2565
2566 kfree(osb->osb_orphan_wipes);
2567 kfree(osb->slot_recovery_generations);
2568 /* FIXME
2569 * This belongs in journal shutdown, but because we have to
2570 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2571 * we free it here.
2572 */
2573 kfree(osb->journal);
2574 if (osb->local_alloc_copy)
2575 kfree(osb->local_alloc_copy);
2576 kfree(osb->uuid_str);
2577 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2578 memset(osb, 0, sizeof(struct ocfs2_super));
2579
2580 mlog_exit_void();
2581 }
2582
2583 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2584 * panic(). We do not support continue-on-error operation. */
2585 static void ocfs2_handle_error(struct super_block *sb)
2586 {
2587 struct ocfs2_super *osb = OCFS2_SB(sb);
2588
2589 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2590 panic("OCFS2: (device %s): panic forced after error\n",
2591 sb->s_id);
2592
2593 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2594
2595 if (sb->s_flags & MS_RDONLY &&
2596 (ocfs2_is_soft_readonly(osb) ||
2597 ocfs2_is_hard_readonly(osb)))
2598 return;
2599
2600 printk(KERN_CRIT "File system is now read-only due to the potential "
2601 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2602 "system is unmounted.\n");
2603 sb->s_flags |= MS_RDONLY;
2604 ocfs2_set_ro_flag(osb, 0);
2605 }
2606
2607 static char error_buf[1024];
2608
2609 void __ocfs2_error(struct super_block *sb,
2610 const char *function,
2611 const char *fmt, ...)
2612 {
2613 va_list args;
2614
2615 va_start(args, fmt);
2616 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2617 va_end(args);
2618
2619 /* Not using mlog here because we want to show the actual
2620 * function the error came from. */
2621 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2622 sb->s_id, function, error_buf);
2623
2624 ocfs2_handle_error(sb);
2625 }
2626
2627 /* Handle critical errors. This is intentionally more drastic than
2628 * ocfs2_handle_error, so we only use for things like journal errors,
2629 * etc. */
2630 void __ocfs2_abort(struct super_block* sb,
2631 const char *function,
2632 const char *fmt, ...)
2633 {
2634 va_list args;
2635
2636 va_start(args, fmt);
2637 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2638 va_end(args);
2639
2640 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2641 sb->s_id, function, error_buf);
2642
2643 /* We don't have the cluster support yet to go straight to
2644 * hard readonly in here. Until then, we want to keep
2645 * ocfs2_abort() so that we can at least mark critical
2646 * errors.
2647 *
2648 * TODO: This should abort the journal and alert other nodes
2649 * that our slot needs recovery. */
2650
2651 /* Force a panic(). This stinks, but it's better than letting
2652 * things continue without having a proper hard readonly
2653 * here. */
2654 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2655 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2656 ocfs2_handle_error(sb);
2657 }
2658
2659 /*
2660 * Void signal blockers, because in-kernel sigprocmask() only fails
2661 * when SIG_* is wrong.
2662 */
2663 void ocfs2_block_signals(sigset_t *oldset)
2664 {
2665 int rc;
2666 sigset_t blocked;
2667
2668 sigfillset(&blocked);
2669 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2670 BUG_ON(rc);
2671 }
2672
2673 void ocfs2_unblock_signals(sigset_t *oldset)
2674 {
2675 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2676 BUG_ON(rc);
2677 }
2678
2679 module_init(ocfs2_init);
2680 module_exit(ocfs2_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree