?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
quota: Fix deadlock during path resolution
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / super.c
blob31c3ffd2f8d004158b39a4a27179c5c812bb6b15
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 {
998 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
999 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
1000
1001 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
1002 return -EINVAL;
1003
1004 return dquot_enable(sb_dqopt(sb)->files[type], type,
1005 format_id, DQUOT_LIMITS_ENABLED);
1006 }
1007
1008 /* Handle quota off quotactl */
1009 static int ocfs2_quota_off(struct super_block *sb, int type)
1010 {
1011 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1012 }
1013
1014 static const struct quotactl_ops ocfs2_quotactl_ops = {
1015 .quota_on_meta = ocfs2_quota_on,
1016 .quota_off = ocfs2_quota_off,
1017 .quota_sync = dquot_quota_sync,
1018 .get_info = dquot_get_dqinfo,
1019 .set_info = dquot_set_dqinfo,
1020 .get_dqblk = dquot_get_dqblk,
1021 .set_dqblk = dquot_set_dqblk,
1022 };
1023
1024 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1025 {
1026 struct dentry *root;
1027 int status, sector_size;
1028 struct mount_options parsed_options;
1029 struct inode *inode = NULL;
1030 struct ocfs2_super *osb = NULL;
1031 struct buffer_head *bh = NULL;
1032 char nodestr[8];
1033 struct ocfs2_blockcheck_stats stats;
1034
1035 mlog_entry("%p, %p, %i", sb, data, silent);
1036
1037 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1038 status = -EINVAL;
1039 goto read_super_error;
1040 }
1041
1042 /* probe for superblock */
1043 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1044 if (status < 0) {
1045 mlog(ML_ERROR, "superblock probe failed!\n");
1046 goto read_super_error;
1047 }
1048
1049 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1050 osb = OCFS2_SB(sb);
1051 if (status < 0) {
1052 mlog_errno(status);
1053 goto read_super_error;
1054 }
1055 brelse(bh);
1056 bh = NULL;
1057
1058 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1059 status = -EINVAL;
1060 goto read_super_error;
1061 }
1062 osb->s_mount_opt = parsed_options.mount_opt;
1063 osb->s_atime_quantum = parsed_options.atime_quantum;
1064 osb->preferred_slot = parsed_options.slot;
1065 osb->osb_commit_interval = parsed_options.commit_interval;
1066
1067 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1068 osb->osb_resv_level = parsed_options.resv_level;
1069 osb->osb_dir_resv_level = parsed_options.resv_level;
1070 if (parsed_options.dir_resv_level == -1)
1071 osb->osb_dir_resv_level = parsed_options.resv_level;
1072 else
1073 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1074
1075 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1076 if (status)
1077 goto read_super_error;
1078
1079 sb->s_magic = OCFS2_SUPER_MAGIC;
1080
1081 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1082 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1083
1084 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1085 * heartbeat=none */
1086 if (bdev_read_only(sb->s_bdev)) {
1087 if (!(sb->s_flags & MS_RDONLY)) {
1088 status = -EACCES;
1089 mlog(ML_ERROR, "Readonly device detected but readonly "
1090 "mount was not specified.\n");
1091 goto read_super_error;
1092 }
1093
1094 /* You should not be able to start a local heartbeat
1095 * on a readonly device. */
1096 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1097 status = -EROFS;
1098 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1099 "device.\n");
1100 goto read_super_error;
1101 }
1102
1103 status = ocfs2_check_journals_nolocks(osb);
1104 if (status < 0) {
1105 if (status == -EROFS)
1106 mlog(ML_ERROR, "Recovery required on readonly "
1107 "file system, but write access is "
1108 "unavailable.\n");
1109 else
1110 mlog_errno(status);
1111 goto read_super_error;
1112 }
1113
1114 ocfs2_set_ro_flag(osb, 1);
1115
1116 printk(KERN_NOTICE "Readonly device detected. No cluster "
1117 "services will be utilized for this mount. Recovery "
1118 "will be skipped.\n");
1119 }
1120
1121 if (!ocfs2_is_hard_readonly(osb)) {
1122 if (sb->s_flags & MS_RDONLY)
1123 ocfs2_set_ro_flag(osb, 0);
1124 }
1125
1126 status = ocfs2_verify_heartbeat(osb);
1127 if (status < 0) {
1128 mlog_errno(status);
1129 goto read_super_error;
1130 }
1131
1132 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1133 ocfs2_debugfs_root);
1134 if (!osb->osb_debug_root) {
1135 status = -EINVAL;
1136 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1137 goto read_super_error;
1138 }
1139
1140 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1141 osb->osb_debug_root,
1142 osb,
1143 &ocfs2_osb_debug_fops);
1144 if (!osb->osb_ctxt) {
1145 status = -EINVAL;
1146 mlog_errno(status);
1147 goto read_super_error;
1148 }
1149
1150 if (ocfs2_meta_ecc(osb)) {
1151 status = ocfs2_blockcheck_stats_debugfs_install(
1152 &osb->osb_ecc_stats,
1153 osb->osb_debug_root);
1154 if (status) {
1155 mlog(ML_ERROR,
1156 "Unable to create blockcheck statistics "
1157 "files\n");
1158 goto read_super_error;
1159 }
1160 }
1161
1162 status = ocfs2_mount_volume(sb);
1163 if (osb->root_inode)
1164 inode = igrab(osb->root_inode);
1165
1166 if (status < 0)
1167 goto read_super_error;
1168
1169 if (!inode) {
1170 status = -EIO;
1171 mlog_errno(status);
1172 goto read_super_error;
1173 }
1174
1175 root = d_alloc_root(inode);
1176 if (!root) {
1177 status = -ENOMEM;
1178 mlog_errno(status);
1179 goto read_super_error;
1180 }
1181
1182 sb->s_root = root;
1183
1184 ocfs2_complete_mount_recovery(osb);
1185
1186 if (ocfs2_mount_local(osb))
1187 snprintf(nodestr, sizeof(nodestr), "local");
1188 else
1189 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1190
1191 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1192 "with %s data mode.\n",
1193 osb->dev_str, nodestr, osb->slot_num,
1194 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1195 "ordered");
1196
1197 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1198 wake_up(&osb->osb_mount_event);
1199
1200 /* Now we can initialize quotas because we can afford to wait
1201 * for cluster locks recovery now. That also means that truncation
1202 * log recovery can happen but that waits for proper quota setup */
1203 if (!(sb->s_flags & MS_RDONLY)) {
1204 status = ocfs2_enable_quotas(osb);
1205 if (status < 0) {
1206 /* We have to err-out specially here because
1207 * s_root is already set */
1208 mlog_errno(status);
1209 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1210 wake_up(&osb->osb_mount_event);
1211 mlog_exit(status);
1212 return status;
1213 }
1214 }
1215
1216 ocfs2_complete_quota_recovery(osb);
1217
1218 /* Now we wake up again for processes waiting for quotas */
1219 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1220 wake_up(&osb->osb_mount_event);
1221
1222 /* Start this when the mount is almost sure of being successful */
1223 ocfs2_orphan_scan_start(osb);
1224
1225 mlog_exit(status);
1226 return status;
1227
1228 read_super_error:
1229 brelse(bh);
1230
1231 if (inode)
1232 iput(inode);
1233
1234 if (osb) {
1235 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1236 wake_up(&osb->osb_mount_event);
1237 ocfs2_dismount_volume(sb, 1);
1238 }
1239
1240 mlog_exit(status);
1241 return status;
1242 }
1243
1244 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1245 int flags,
1246 const char *dev_name,
1247 void *data)
1248 {
1249 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1250 }
1251
1252 static void ocfs2_kill_sb(struct super_block *sb)
1253 {
1254 struct ocfs2_super *osb = OCFS2_SB(sb);
1255
1256 /* Failed mount? */
1257 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1258 goto out;
1259
1260 /* Prevent further queueing of inode drop events */
1261 spin_lock(&dentry_list_lock);
1262 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1263 spin_unlock(&dentry_list_lock);
1264 /* Wait for work to finish and/or remove it */
1265 cancel_work_sync(&osb->dentry_lock_work);
1266 out:
1267 kill_block_super(sb);
1268 }
1269
1270 static struct file_system_type ocfs2_fs_type = {
1271 .owner = THIS_MODULE,
1272 .name = "ocfs2",
1273 .mount = ocfs2_mount,
1274 .kill_sb = ocfs2_kill_sb,
1275
1276 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1277 .next = NULL
1278 };
1279
1280 static int ocfs2_check_set_options(struct super_block *sb,
1281 struct mount_options *options)
1282 {
1283 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1284 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1285 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1286 mlog(ML_ERROR, "User 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_GRPQUOTA &&
1291 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1292 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1293 mlog(ML_ERROR, "Group quotas were requested, but this "
1294 "filesystem does not have the feature enabled.\n");
1295 return 0;
1296 }
1297 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1298 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1299 mlog(ML_ERROR, "ACL support requested but extended attributes "
1300 "feature is not enabled\n");
1301 return 0;
1302 }
1303 /* No ACL setting specified? Use XATTR feature... */
1304 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1305 OCFS2_MOUNT_NO_POSIX_ACL))) {
1306 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1307 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1308 else
1309 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1310 }
1311 return 1;
1312 }
1313
1314 static int ocfs2_parse_options(struct super_block *sb,
1315 char *options,
1316 struct mount_options *mopt,
1317 int is_remount)
1318 {
1319 int status;
1320 char *p;
1321 u32 tmp;
1322
1323 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1324 options ? options : "(none)");
1325
1326 mopt->commit_interval = 0;
1327 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1328 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1329 mopt->slot = OCFS2_INVALID_SLOT;
1330 mopt->localalloc_opt = -1;
1331 mopt->cluster_stack[0] = '\0';
1332 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1333 mopt->dir_resv_level = -1;
1334
1335 if (!options) {
1336 status = 1;
1337 goto bail;
1338 }
1339
1340 while ((p = strsep(&options, ",")) != NULL) {
1341 int token, option;
1342 substring_t args[MAX_OPT_ARGS];
1343
1344 if (!*p)
1345 continue;
1346
1347 token = match_token(p, tokens, args);
1348 switch (token) {
1349 case Opt_hb_local:
1350 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1351 break;
1352 case Opt_hb_none:
1353 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1354 break;
1355 case Opt_hb_global:
1356 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1357 break;
1358 case Opt_barrier:
1359 if (match_int(&args[0], &option)) {
1360 status = 0;
1361 goto bail;
1362 }
1363 if (option)
1364 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1365 else
1366 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1367 break;
1368 case Opt_intr:
1369 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1370 break;
1371 case Opt_nointr:
1372 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1373 break;
1374 case Opt_err_panic:
1375 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1376 break;
1377 case Opt_err_ro:
1378 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1379 break;
1380 case Opt_data_ordered:
1381 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1382 break;
1383 case Opt_data_writeback:
1384 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1385 break;
1386 case Opt_user_xattr:
1387 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1388 break;
1389 case Opt_nouser_xattr:
1390 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1391 break;
1392 case Opt_atime_quantum:
1393 if (match_int(&args[0], &option)) {
1394 status = 0;
1395 goto bail;
1396 }
1397 if (option >= 0)
1398 mopt->atime_quantum = option;
1399 break;
1400 case Opt_slot:
1401 option = 0;
1402 if (match_int(&args[0], &option)) {
1403 status = 0;
1404 goto bail;
1405 }
1406 if (option)
1407 mopt->slot = (s16)option;
1408 break;
1409 case Opt_commit:
1410 option = 0;
1411 if (match_int(&args[0], &option)) {
1412 status = 0;
1413 goto bail;
1414 }
1415 if (option < 0)
1416 return 0;
1417 if (option == 0)
1418 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1419 mopt->commit_interval = HZ * option;
1420 break;
1421 case Opt_localalloc:
1422 option = 0;
1423 if (match_int(&args[0], &option)) {
1424 status = 0;
1425 goto bail;
1426 }
1427 if (option >= 0)
1428 mopt->localalloc_opt = option;
1429 break;
1430 case Opt_localflocks:
1431 /*
1432 * Changing this during remount could race
1433 * flock() requests, or "unbalance" existing
1434 * ones (e.g., a lock is taken in one mode but
1435 * dropped in the other). If users care enough
1436 * to flip locking modes during remount, we
1437 * could add a "local" flag to individual
1438 * flock structures for proper tracking of
1439 * state.
1440 */
1441 if (!is_remount)
1442 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1443 break;
1444 case Opt_stack:
1445 /* Check both that the option we were passed
1446 * is of the right length and that it is a proper
1447 * string of the right length.
1448 */
1449 if (((args[0].to - args[0].from) !=
1450 OCFS2_STACK_LABEL_LEN) ||
1451 (strnlen(args[0].from,
1452 OCFS2_STACK_LABEL_LEN) !=
1453 OCFS2_STACK_LABEL_LEN)) {
1454 mlog(ML_ERROR,
1455 "Invalid cluster_stack option\n");
1456 status = 0;
1457 goto bail;
1458 }
1459 memcpy(mopt->cluster_stack, args[0].from,
1460 OCFS2_STACK_LABEL_LEN);
1461 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1462 break;
1463 case Opt_inode64:
1464 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1465 break;
1466 case Opt_usrquota:
1467 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1468 break;
1469 case Opt_grpquota:
1470 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1471 break;
1472 case Opt_coherency_buffered:
1473 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1474 break;
1475 case Opt_coherency_full:
1476 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1477 break;
1478 case Opt_acl:
1479 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1480 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1481 break;
1482 case Opt_noacl:
1483 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1484 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1485 break;
1486 case Opt_resv_level:
1487 if (is_remount)
1488 break;
1489 if (match_int(&args[0], &option)) {
1490 status = 0;
1491 goto bail;
1492 }
1493 if (option >= OCFS2_MIN_RESV_LEVEL &&
1494 option < OCFS2_MAX_RESV_LEVEL)
1495 mopt->resv_level = option;
1496 break;
1497 case Opt_dir_resv_level:
1498 if (is_remount)
1499 break;
1500 if (match_int(&args[0], &option)) {
1501 status = 0;
1502 goto bail;
1503 }
1504 if (option >= OCFS2_MIN_RESV_LEVEL &&
1505 option < OCFS2_MAX_RESV_LEVEL)
1506 mopt->dir_resv_level = option;
1507 break;
1508 default:
1509 mlog(ML_ERROR,
1510 "Unrecognized mount option \"%s\" "
1511 "or missing value\n", p);
1512 status = 0;
1513 goto bail;
1514 }
1515 }
1516
1517 /* Ensure only one heartbeat mode */
1518 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
1519 OCFS2_MOUNT_HB_NONE);
1520 if (hweight32(tmp) != 1) {
1521 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1522 status = 0;
1523 goto bail;
1524 }
1525
1526 status = 1;
1527
1528 bail:
1529 mlog_exit(status);
1530 return status;
1531 }
1532
1533 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1534 {
1535 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1536 unsigned long opts = osb->s_mount_opt;
1537 unsigned int local_alloc_megs;
1538
1539 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1540 seq_printf(s, ",_netdev");
1541 if (opts & OCFS2_MOUNT_HB_LOCAL)
1542 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1543 else
1544 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1545 } else
1546 seq_printf(s, ",%s", OCFS2_HB_NONE);
1547
1548 if (opts & OCFS2_MOUNT_NOINTR)
1549 seq_printf(s, ",nointr");
1550
1551 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1552 seq_printf(s, ",data=writeback");
1553 else
1554 seq_printf(s, ",data=ordered");
1555
1556 if (opts & OCFS2_MOUNT_BARRIER)
1557 seq_printf(s, ",barrier=1");
1558
1559 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1560 seq_printf(s, ",errors=panic");
1561 else
1562 seq_printf(s, ",errors=remount-ro");
1563
1564 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1565 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1566
1567 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1568 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1569
1570 if (osb->osb_commit_interval)
1571 seq_printf(s, ",commit=%u",
1572 (unsigned) (osb->osb_commit_interval / HZ));
1573
1574 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1575 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1576 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1577
1578 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1579 seq_printf(s, ",localflocks,");
1580
1581 if (osb->osb_cluster_stack[0])
1582 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1583 osb->osb_cluster_stack);
1584 if (opts & OCFS2_MOUNT_USRQUOTA)
1585 seq_printf(s, ",usrquota");
1586 if (opts & OCFS2_MOUNT_GRPQUOTA)
1587 seq_printf(s, ",grpquota");
1588
1589 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1590 seq_printf(s, ",coherency=buffered");
1591 else
1592 seq_printf(s, ",coherency=full");
1593
1594 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1595 seq_printf(s, ",nouser_xattr");
1596 else
1597 seq_printf(s, ",user_xattr");
1598
1599 if (opts & OCFS2_MOUNT_INODE64)
1600 seq_printf(s, ",inode64");
1601
1602 if (opts & OCFS2_MOUNT_POSIX_ACL)
1603 seq_printf(s, ",acl");
1604 else
1605 seq_printf(s, ",noacl");
1606
1607 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1608 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1609
1610 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1611 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1612
1613 return 0;
1614 }
1615
1616 static int __init ocfs2_init(void)
1617 {
1618 int status;
1619
1620 mlog_entry_void();
1621
1622 ocfs2_print_version();
1623
1624 status = init_ocfs2_uptodate_cache();
1625 if (status < 0) {
1626 mlog_errno(status);
1627 goto leave;
1628 }
1629
1630 status = ocfs2_initialize_mem_caches();
1631 if (status < 0) {
1632 mlog_errno(status);
1633 goto leave;
1634 }
1635
1636 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1637 if (!ocfs2_wq) {
1638 status = -ENOMEM;
1639 goto leave;
1640 }
1641
1642 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1643 if (!ocfs2_debugfs_root) {
1644 status = -EFAULT;
1645 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1646 }
1647
1648 status = ocfs2_quota_setup();
1649 if (status)
1650 goto leave;
1651
1652 ocfs2_set_locking_protocol();
1653
1654 status = register_quota_format(&ocfs2_quota_format);
1655 leave:
1656 if (status < 0) {
1657 ocfs2_quota_shutdown();
1658 ocfs2_free_mem_caches();
1659 exit_ocfs2_uptodate_cache();
1660 }
1661
1662 mlog_exit(status);
1663
1664 if (status >= 0) {
1665 return register_filesystem(&ocfs2_fs_type);
1666 } else
1667 return -1;
1668 }
1669
1670 static void __exit ocfs2_exit(void)
1671 {
1672 mlog_entry_void();
1673
1674 ocfs2_quota_shutdown();
1675
1676 if (ocfs2_wq) {
1677 flush_workqueue(ocfs2_wq);
1678 destroy_workqueue(ocfs2_wq);
1679 }
1680
1681 unregister_quota_format(&ocfs2_quota_format);
1682
1683 debugfs_remove(ocfs2_debugfs_root);
1684
1685 ocfs2_free_mem_caches();
1686
1687 unregister_filesystem(&ocfs2_fs_type);
1688
1689 exit_ocfs2_uptodate_cache();
1690
1691 mlog_exit_void();
1692 }
1693
1694 static void ocfs2_put_super(struct super_block *sb)
1695 {
1696 mlog_entry("(0x%p)\n", sb);
1697
1698 ocfs2_sync_blockdev(sb);
1699 ocfs2_dismount_volume(sb, 0);
1700
1701 mlog_exit_void();
1702 }
1703
1704 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1705 {
1706 struct ocfs2_super *osb;
1707 u32 numbits, freebits;
1708 int status;
1709 struct ocfs2_dinode *bm_lock;
1710 struct buffer_head *bh = NULL;
1711 struct inode *inode = NULL;
1712
1713 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1714
1715 osb = OCFS2_SB(dentry->d_sb);
1716
1717 inode = ocfs2_get_system_file_inode(osb,
1718 GLOBAL_BITMAP_SYSTEM_INODE,
1719 OCFS2_INVALID_SLOT);
1720 if (!inode) {
1721 mlog(ML_ERROR, "failed to get bitmap inode\n");
1722 status = -EIO;
1723 goto bail;
1724 }
1725
1726 status = ocfs2_inode_lock(inode, &bh, 0);
1727 if (status < 0) {
1728 mlog_errno(status);
1729 goto bail;
1730 }
1731
1732 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1733
1734 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1735 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1736
1737 buf->f_type = OCFS2_SUPER_MAGIC;
1738 buf->f_bsize = dentry->d_sb->s_blocksize;
1739 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1740 buf->f_blocks = ((sector_t) numbits) *
1741 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1742 buf->f_bfree = ((sector_t) freebits) *
1743 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1744 buf->f_bavail = buf->f_bfree;
1745 buf->f_files = numbits;
1746 buf->f_ffree = freebits;
1747 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1748 & 0xFFFFFFFFUL;
1749 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1750 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1751
1752 brelse(bh);
1753
1754 ocfs2_inode_unlock(inode, 0);
1755 status = 0;
1756 bail:
1757 if (inode)
1758 iput(inode);
1759
1760 mlog_exit(status);
1761
1762 return status;
1763 }
1764
1765 static void ocfs2_inode_init_once(void *data)
1766 {
1767 struct ocfs2_inode_info *oi = data;
1768
1769 oi->ip_flags = 0;
1770 oi->ip_open_count = 0;
1771 spin_lock_init(&oi->ip_lock);
1772 ocfs2_extent_map_init(&oi->vfs_inode);
1773 INIT_LIST_HEAD(&oi->ip_io_markers);
1774 oi->ip_dir_start_lookup = 0;
1775
1776 init_rwsem(&oi->ip_alloc_sem);
1777 init_rwsem(&oi->ip_xattr_sem);
1778 mutex_init(&oi->ip_io_mutex);
1779
1780 oi->ip_blkno = 0ULL;
1781 oi->ip_clusters = 0;
1782
1783 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1784
1785 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1786 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1787 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1788
1789 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1790 &ocfs2_inode_caching_ops);
1791
1792 inode_init_once(&oi->vfs_inode);
1793 }
1794
1795 static int ocfs2_initialize_mem_caches(void)
1796 {
1797 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1798 sizeof(struct ocfs2_inode_info),
1799 0,
1800 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1801 SLAB_MEM_SPREAD),
1802 ocfs2_inode_init_once);
1803 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1804 sizeof(struct ocfs2_dquot),
1805 0,
1806 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1807 SLAB_MEM_SPREAD),
1808 NULL);
1809 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1810 sizeof(struct ocfs2_quota_chunk),
1811 0,
1812 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1813 NULL);
1814 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1815 !ocfs2_qf_chunk_cachep) {
1816 if (ocfs2_inode_cachep)
1817 kmem_cache_destroy(ocfs2_inode_cachep);
1818 if (ocfs2_dquot_cachep)
1819 kmem_cache_destroy(ocfs2_dquot_cachep);
1820 if (ocfs2_qf_chunk_cachep)
1821 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1822 return -ENOMEM;
1823 }
1824
1825 return 0;
1826 }
1827
1828 static void ocfs2_free_mem_caches(void)
1829 {
1830 if (ocfs2_inode_cachep)
1831 kmem_cache_destroy(ocfs2_inode_cachep);
1832 ocfs2_inode_cachep = NULL;
1833
1834 if (ocfs2_dquot_cachep)
1835 kmem_cache_destroy(ocfs2_dquot_cachep);
1836 ocfs2_dquot_cachep = NULL;
1837
1838 if (ocfs2_qf_chunk_cachep)
1839 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1840 ocfs2_qf_chunk_cachep = NULL;
1841 }
1842
1843 static int ocfs2_get_sector(struct super_block *sb,
1844 struct buffer_head **bh,
1845 int block,
1846 int sect_size)
1847 {
1848 if (!sb_set_blocksize(sb, sect_size)) {
1849 mlog(ML_ERROR, "unable to set blocksize\n");
1850 return -EIO;
1851 }
1852
1853 *bh = sb_getblk(sb, block);
1854 if (!*bh) {
1855 mlog_errno(-EIO);
1856 return -EIO;
1857 }
1858 lock_buffer(*bh);
1859 if (!buffer_dirty(*bh))
1860 clear_buffer_uptodate(*bh);
1861 unlock_buffer(*bh);
1862 ll_rw_block(READ, 1, bh);
1863 wait_on_buffer(*bh);
1864 if (!buffer_uptodate(*bh)) {
1865 mlog_errno(-EIO);
1866 brelse(*bh);
1867 *bh = NULL;
1868 return -EIO;
1869 }
1870
1871 return 0;
1872 }
1873
1874 static int ocfs2_mount_volume(struct super_block *sb)
1875 {
1876 int status = 0;
1877 int unlock_super = 0;
1878 struct ocfs2_super *osb = OCFS2_SB(sb);
1879
1880 mlog_entry_void();
1881
1882 if (ocfs2_is_hard_readonly(osb))
1883 goto leave;
1884
1885 status = ocfs2_dlm_init(osb);
1886 if (status < 0) {
1887 mlog_errno(status);
1888 goto leave;
1889 }
1890
1891 status = ocfs2_super_lock(osb, 1);
1892 if (status < 0) {
1893 mlog_errno(status);
1894 goto leave;
1895 }
1896 unlock_super = 1;
1897
1898 /* This will load up the node map and add ourselves to it. */
1899 status = ocfs2_find_slot(osb);
1900 if (status < 0) {
1901 mlog_errno(status);
1902 goto leave;
1903 }
1904
1905 /* load all node-local system inodes */
1906 status = ocfs2_init_local_system_inodes(osb);
1907 if (status < 0) {
1908 mlog_errno(status);
1909 goto leave;
1910 }
1911
1912 status = ocfs2_check_volume(osb);
1913 if (status < 0) {
1914 mlog_errno(status);
1915 goto leave;
1916 }
1917
1918 status = ocfs2_truncate_log_init(osb);
1919 if (status < 0)
1920 mlog_errno(status);
1921
1922 leave:
1923 if (unlock_super)
1924 ocfs2_super_unlock(osb, 1);
1925
1926 mlog_exit(status);
1927 return status;
1928 }
1929
1930 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1931 {
1932 int tmp, hangup_needed = 0;
1933 struct ocfs2_super *osb = NULL;
1934 char nodestr[8];
1935
1936 mlog_entry("(0x%p)\n", sb);
1937
1938 BUG_ON(!sb);
1939 osb = OCFS2_SB(sb);
1940 BUG_ON(!osb);
1941
1942 debugfs_remove(osb->osb_ctxt);
1943
1944 /*
1945 * Flush inode dropping work queue so that deletes are
1946 * performed while the filesystem is still working
1947 */
1948 ocfs2_drop_all_dl_inodes(osb);
1949
1950 /* Orphan scan should be stopped as early as possible */
1951 ocfs2_orphan_scan_stop(osb);
1952
1953 ocfs2_disable_quotas(osb);
1954
1955 ocfs2_shutdown_local_alloc(osb);
1956
1957 ocfs2_truncate_log_shutdown(osb);
1958
1959 /* This will disable recovery and flush any recovery work. */
1960 ocfs2_recovery_exit(osb);
1961
1962 ocfs2_journal_shutdown(osb);
1963
1964 ocfs2_sync_blockdev(sb);
1965
1966 ocfs2_purge_refcount_trees(osb);
1967
1968 /* No cluster connection means we've failed during mount, so skip
1969 * all the steps which depended on that to complete. */
1970 if (osb->cconn) {
1971 tmp = ocfs2_super_lock(osb, 1);
1972 if (tmp < 0) {
1973 mlog_errno(tmp);
1974 return;
1975 }
1976 }
1977
1978 if (osb->slot_num != OCFS2_INVALID_SLOT)
1979 ocfs2_put_slot(osb);
1980
1981 if (osb->cconn)
1982 ocfs2_super_unlock(osb, 1);
1983
1984 ocfs2_release_system_inodes(osb);
1985
1986 /*
1987 * If we're dismounting due to mount error, mount.ocfs2 will clean
1988 * up heartbeat. If we're a local mount, there is no heartbeat.
1989 * If we failed before we got a uuid_str yet, we can't stop
1990 * heartbeat. Otherwise, do it.
1991 */
1992 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1993 hangup_needed = 1;
1994
1995 if (osb->cconn)
1996 ocfs2_dlm_shutdown(osb, hangup_needed);
1997
1998 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1999 debugfs_remove(osb->osb_debug_root);
2000
2001 if (hangup_needed)
2002 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
2003
2004 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
2005
2006 if (ocfs2_mount_local(osb))
2007 snprintf(nodestr, sizeof(nodestr), "local");
2008 else
2009 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2010
2011 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2012 osb->dev_str, nodestr);
2013
2014 ocfs2_delete_osb(osb);
2015 kfree(osb);
2016 sb->s_dev = 0;
2017 sb->s_fs_info = NULL;
2018 }
2019
2020 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2021 unsigned uuid_bytes)
2022 {
2023 int i, ret;
2024 char *ptr;
2025
2026 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2027
2028 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2029 if (osb->uuid_str == NULL)
2030 return -ENOMEM;
2031
2032 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2033 /* print with null */
2034 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2035 if (ret != 2) /* drop super cleans up */
2036 return -EINVAL;
2037 /* then only advance past the last char */
2038 ptr += 2;
2039 }
2040
2041 return 0;
2042 }
2043
2044 /* Make sure entire volume is addressable by our journal. Requires
2045 osb_clusters_at_boot to be valid and for the journal to have been
2046 initialized by ocfs2_journal_init(). */
2047 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2048 {
2049 int status = 0;
2050 u64 max_block =
2051 ocfs2_clusters_to_blocks(osb->sb,
2052 osb->osb_clusters_at_boot) - 1;
2053
2054 /* 32-bit block number is always OK. */
2055 if (max_block <= (u32)~0ULL)
2056 goto out;
2057
2058 /* Volume is "huge", so see if our journal is new enough to
2059 support it. */
2060 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2061 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2062 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2063 JBD2_FEATURE_INCOMPAT_64BIT))) {
2064 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2065 "Enable the 'block64' journal option with tunefs.ocfs2");
2066 status = -EFBIG;
2067 goto out;
2068 }
2069
2070 out:
2071 return status;
2072 }
2073
2074 static int ocfs2_initialize_super(struct super_block *sb,
2075 struct buffer_head *bh,
2076 int sector_size,
2077 struct ocfs2_blockcheck_stats *stats)
2078 {
2079 int status;
2080 int i, cbits, bbits;
2081 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2082 struct inode *inode = NULL;
2083 struct ocfs2_journal *journal;
2084 __le32 uuid_net_key;
2085 struct ocfs2_super *osb;
2086 u64 total_blocks;
2087
2088 mlog_entry_void();
2089
2090 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2091 if (!osb) {
2092 status = -ENOMEM;
2093 mlog_errno(status);
2094 goto bail;
2095 }
2096
2097 sb->s_fs_info = osb;
2098 sb->s_op = &ocfs2_sops;
2099 sb->s_export_op = &ocfs2_export_ops;
2100 sb->s_qcop = &ocfs2_quotactl_ops;
2101 sb->dq_op = &ocfs2_quota_operations;
2102 sb->s_xattr = ocfs2_xattr_handlers;
2103 sb->s_time_gran = 1;
2104 sb->s_flags |= MS_NOATIME;
2105 /* this is needed to support O_LARGEFILE */
2106 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2107 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2108 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2109
2110 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2111
2112 for (i = 0; i < 3; i++)
2113 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2114 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2115
2116 osb->sb = sb;
2117 /* Save off for ocfs2_rw_direct */
2118 osb->s_sectsize_bits = blksize_bits(sector_size);
2119 BUG_ON(!osb->s_sectsize_bits);
2120
2121 spin_lock_init(&osb->dc_task_lock);
2122 init_waitqueue_head(&osb->dc_event);
2123 osb->dc_work_sequence = 0;
2124 osb->dc_wake_sequence = 0;
2125 INIT_LIST_HEAD(&osb->blocked_lock_list);
2126 osb->blocked_lock_count = 0;
2127 spin_lock_init(&osb->osb_lock);
2128 spin_lock_init(&osb->osb_xattr_lock);
2129 ocfs2_init_steal_slots(osb);
2130
2131 atomic_set(&osb->alloc_stats.moves, 0);
2132 atomic_set(&osb->alloc_stats.local_data, 0);
2133 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2134 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2135 atomic_set(&osb->alloc_stats.bg_extends, 0);
2136
2137 /* Copy the blockcheck stats from the superblock probe */
2138 osb->osb_ecc_stats = *stats;
2139
2140 ocfs2_init_node_maps(osb);
2141
2142 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2143 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2144
2145 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2146 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2147 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2148 osb->max_slots);
2149 status = -EINVAL;
2150 goto bail;
2151 }
2152 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2153
2154 ocfs2_orphan_scan_init(osb);
2155
2156 status = ocfs2_recovery_init(osb);
2157 if (status) {
2158 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2159 mlog_errno(status);
2160 goto bail;
2161 }
2162
2163 init_waitqueue_head(&osb->checkpoint_event);
2164 atomic_set(&osb->needs_checkpoint, 0);
2165
2166 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2167
2168 osb->slot_num = OCFS2_INVALID_SLOT;
2169
2170 osb->s_xattr_inline_size = le16_to_cpu(
2171 di->id2.i_super.s_xattr_inline_size);
2172
2173 osb->local_alloc_state = OCFS2_LA_UNUSED;
2174 osb->local_alloc_bh = NULL;
2175 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2176
2177 init_waitqueue_head(&osb->osb_mount_event);
2178
2179 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2180 if (status) {
2181 mlog_errno(status);
2182 goto bail;
2183 }
2184
2185 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2186 if (!osb->vol_label) {
2187 mlog(ML_ERROR, "unable to alloc vol label\n");
2188 status = -ENOMEM;
2189 goto bail;
2190 }
2191
2192 osb->slot_recovery_generations =
2193 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2194 GFP_KERNEL);
2195 if (!osb->slot_recovery_generations) {
2196 status = -ENOMEM;
2197 mlog_errno(status);
2198 goto bail;
2199 }
2200
2201 init_waitqueue_head(&osb->osb_wipe_event);
2202 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2203 sizeof(*osb->osb_orphan_wipes),
2204 GFP_KERNEL);
2205 if (!osb->osb_orphan_wipes) {
2206 status = -ENOMEM;
2207 mlog_errno(status);
2208 goto bail;
2209 }
2210
2211 osb->osb_rf_lock_tree = RB_ROOT;
2212
2213 osb->s_feature_compat =
2214 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2215 osb->s_feature_ro_compat =
2216 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2217 osb->s_feature_incompat =
2218 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2219
2220 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2221 mlog(ML_ERROR, "couldn't mount because of unsupported "
2222 "optional features (%x).\n", i);
2223 status = -EINVAL;
2224 goto bail;
2225 }
2226 if (!(osb->sb->s_flags & MS_RDONLY) &&
2227 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2228 mlog(ML_ERROR, "couldn't mount RDWR because of "
2229 "unsupported optional features (%x).\n", i);
2230 status = -EINVAL;
2231 goto bail;
2232 }
2233
2234 if (ocfs2_clusterinfo_valid(osb)) {
2235 osb->osb_stackflags =
2236 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2237 memcpy(osb->osb_cluster_stack,
2238 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2239 OCFS2_STACK_LABEL_LEN);
2240 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2241 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2242 mlog(ML_ERROR,
2243 "couldn't mount because of an invalid "
2244 "cluster stack label (%s) \n",
2245 osb->osb_cluster_stack);
2246 status = -EINVAL;
2247 goto bail;
2248 }
2249 } else {
2250 /* The empty string is identical with classic tools that
2251 * don't know about s_cluster_info. */
2252 osb->osb_cluster_stack[0] = '\0';
2253 }
2254
2255 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2256
2257 /* FIXME
2258 * This should be done in ocfs2_journal_init(), but unknown
2259 * ordering issues will cause the filesystem to crash.
2260 * If anyone wants to figure out what part of the code
2261 * refers to osb->journal before ocfs2_journal_init() is run,
2262 * be my guest.
2263 */
2264 /* initialize our journal structure */
2265
2266 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2267 if (!journal) {
2268 mlog(ML_ERROR, "unable to alloc journal\n");
2269 status = -ENOMEM;
2270 goto bail;
2271 }
2272 osb->journal = journal;
2273 journal->j_osb = osb;
2274
2275 atomic_set(&journal->j_num_trans, 0);
2276 init_rwsem(&journal->j_trans_barrier);
2277 init_waitqueue_head(&journal->j_checkpointed);
2278 spin_lock_init(&journal->j_lock);
2279 journal->j_trans_id = (unsigned long) 1;
2280 INIT_LIST_HEAD(&journal->j_la_cleanups);
2281 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2282 journal->j_state = OCFS2_JOURNAL_FREE;
2283
2284 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2285 osb->dentry_lock_list = NULL;
2286
2287 /* get some pseudo constants for clustersize bits */
2288 osb->s_clustersize_bits =
2289 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2290 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2291 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2292
2293 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2294 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2295 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2296 osb->s_clustersize);
2297 status = -EINVAL;
2298 goto bail;
2299 }
2300
2301 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2302 le32_to_cpu(di->i_clusters));
2303
2304 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2305 total_blocks);
2306 if (status) {
2307 mlog(ML_ERROR, "Volume too large "
2308 "to mount safely on this system");
2309 status = -EFBIG;
2310 goto bail;
2311 }
2312
2313 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2314 sizeof(di->id2.i_super.s_uuid))) {
2315 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2316 status = -ENOMEM;
2317 goto bail;
2318 }
2319
2320 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2321
2322 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2323 osb->vol_label[63] = '\0';
2324 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2325 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2326 osb->first_cluster_group_blkno =
2327 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2328 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2329 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2330 mlog(0, "vol_label: %s\n", osb->vol_label);
2331 mlog(0, "uuid: %s\n", osb->uuid_str);
2332 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2333 (unsigned long long)osb->root_blkno,
2334 (unsigned long long)osb->system_dir_blkno);
2335
2336 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2337 if (!osb->osb_dlm_debug) {
2338 status = -ENOMEM;
2339 mlog_errno(status);
2340 goto bail;
2341 }
2342
2343 atomic_set(&osb->vol_state, VOLUME_INIT);
2344
2345 /* load root, system_dir, and all global system inodes */
2346 status = ocfs2_init_global_system_inodes(osb);
2347 if (status < 0) {
2348 mlog_errno(status);
2349 goto bail;
2350 }
2351
2352 /*
2353 * global bitmap
2354 */
2355 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2356 OCFS2_INVALID_SLOT);
2357 if (!inode) {
2358 status = -EINVAL;
2359 mlog_errno(status);
2360 goto bail;
2361 }
2362
2363 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2364 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2365 iput(inode);
2366
2367 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2368 osb->s_feature_incompat) * 8;
2369
2370 status = ocfs2_init_slot_info(osb);
2371 if (status < 0) {
2372 mlog_errno(status);
2373 goto bail;
2374 }
2375
2376 bail:
2377 mlog_exit(status);
2378 return status;
2379 }
2380
2381 /*
2382 * will return: -EAGAIN if it is ok to keep searching for superblocks
2383 * -EINVAL if there is a bad superblock
2384 * 0 on success
2385 */
2386 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2387 struct buffer_head *bh,
2388 u32 blksz,
2389 struct ocfs2_blockcheck_stats *stats)
2390 {
2391 int status = -EAGAIN;
2392
2393 mlog_entry_void();
2394
2395 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2396 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2397 /* We have to do a raw check of the feature here */
2398 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2399 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2400 status = ocfs2_block_check_validate(bh->b_data,
2401 bh->b_size,
2402 &di->i_check,
2403 stats);
2404 if (status)
2405 goto out;
2406 }
2407 status = -EINVAL;
2408 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2409 mlog(ML_ERROR, "found superblock with incorrect block "
2410 "size: found %u, should be %u\n",
2411 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2412 blksz);
2413 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2414 OCFS2_MAJOR_REV_LEVEL ||
2415 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2416 OCFS2_MINOR_REV_LEVEL) {
2417 mlog(ML_ERROR, "found superblock with bad version: "
2418 "found %u.%u, should be %u.%u\n",
2419 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2420 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2421 OCFS2_MAJOR_REV_LEVEL,
2422 OCFS2_MINOR_REV_LEVEL);
2423 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2424 mlog(ML_ERROR, "bad block number on superblock: "
2425 "found %llu, should be %llu\n",
2426 (unsigned long long)le64_to_cpu(di->i_blkno),
2427 (unsigned long long)bh->b_blocknr);
2428 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2429 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2430 mlog(ML_ERROR, "bad cluster size found: %u\n",
2431 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2432 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2433 mlog(ML_ERROR, "bad root_blkno: 0\n");
2434 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2435 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2436 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2437 mlog(ML_ERROR,
2438 "Superblock slots found greater than file system "
2439 "maximum: found %u, max %u\n",
2440 le16_to_cpu(di->id2.i_super.s_max_slots),
2441 OCFS2_MAX_SLOTS);
2442 } else {
2443 /* found it! */
2444 status = 0;
2445 }
2446 }
2447
2448 out:
2449 mlog_exit(status);
2450 return status;
2451 }
2452
2453 static int ocfs2_check_volume(struct ocfs2_super *osb)
2454 {
2455 int status;
2456 int dirty;
2457 int local;
2458 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2459 * recover
2460 * ourselves. */
2461
2462 mlog_entry_void();
2463
2464 /* Init our journal object. */
2465 status = ocfs2_journal_init(osb->journal, &dirty);
2466 if (status < 0) {
2467 mlog(ML_ERROR, "Could not initialize journal!\n");
2468 goto finally;
2469 }
2470
2471 /* Now that journal has been initialized, check to make sure
2472 entire volume is addressable. */
2473 status = ocfs2_journal_addressable(osb);
2474 if (status)
2475 goto finally;
2476
2477 /* If the journal was unmounted cleanly then we don't want to
2478 * recover anything. Otherwise, journal_load will do that
2479 * dirty work for us :) */
2480 if (!dirty) {
2481 status = ocfs2_journal_wipe(osb->journal, 0);
2482 if (status < 0) {
2483 mlog_errno(status);
2484 goto finally;
2485 }
2486 } else {
2487 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2488 "recovering volume.\n");
2489 }
2490
2491 local = ocfs2_mount_local(osb);
2492
2493 /* will play back anything left in the journal. */
2494 status = ocfs2_journal_load(osb->journal, local, dirty);
2495 if (status < 0) {
2496 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2497 goto finally;
2498 }
2499
2500 if (dirty) {
2501 /* recover my local alloc if we didn't unmount cleanly. */
2502 status = ocfs2_begin_local_alloc_recovery(osb,
2503 osb->slot_num,
2504 &local_alloc);
2505 if (status < 0) {
2506 mlog_errno(status);
2507 goto finally;
2508 }
2509 /* we complete the recovery process after we've marked
2510 * ourselves as mounted. */
2511 }
2512
2513 mlog(0, "Journal loaded.\n");
2514
2515 status = ocfs2_load_local_alloc(osb);
2516 if (status < 0) {
2517 mlog_errno(status);
2518 goto finally;
2519 }
2520
2521 if (dirty) {
2522 /* Recovery will be completed after we've mounted the
2523 * rest of the volume. */
2524 osb->dirty = 1;
2525 osb->local_alloc_copy = local_alloc;
2526 local_alloc = NULL;
2527 }
2528
2529 /* go through each journal, trylock it and if you get the
2530 * lock, and it's marked as dirty, set the bit in the recover
2531 * map and launch a recovery thread for it. */
2532 status = ocfs2_mark_dead_nodes(osb);
2533 if (status < 0) {
2534 mlog_errno(status);
2535 goto finally;
2536 }
2537
2538 status = ocfs2_compute_replay_slots(osb);
2539 if (status < 0)
2540 mlog_errno(status);
2541
2542 finally:
2543 if (local_alloc)
2544 kfree(local_alloc);
2545
2546 mlog_exit(status);
2547 return status;
2548 }
2549
2550 /*
2551 * The routine gets called from dismount or close whenever a dismount on
2552 * volume is requested and the osb open count becomes 1.
2553 * It will remove the osb from the global list and also free up all the
2554 * initialized resources and fileobject.
2555 */
2556 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2557 {
2558 mlog_entry_void();
2559
2560 /* This function assumes that the caller has the main osb resource */
2561
2562 ocfs2_free_slot_info(osb);
2563
2564 kfree(osb->osb_orphan_wipes);
2565 kfree(osb->slot_recovery_generations);
2566 /* FIXME
2567 * This belongs in journal shutdown, but because we have to
2568 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2569 * we free it here.
2570 */
2571 kfree(osb->journal);
2572 if (osb->local_alloc_copy)
2573 kfree(osb->local_alloc_copy);
2574 kfree(osb->uuid_str);
2575 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2576 memset(osb, 0, sizeof(struct ocfs2_super));
2577
2578 mlog_exit_void();
2579 }
2580
2581 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2582 * panic(). We do not support continue-on-error operation. */
2583 static void ocfs2_handle_error(struct super_block *sb)
2584 {
2585 struct ocfs2_super *osb = OCFS2_SB(sb);
2586
2587 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2588 panic("OCFS2: (device %s): panic forced after error\n",
2589 sb->s_id);
2590
2591 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2592
2593 if (sb->s_flags & MS_RDONLY &&
2594 (ocfs2_is_soft_readonly(osb) ||
2595 ocfs2_is_hard_readonly(osb)))
2596 return;
2597
2598 printk(KERN_CRIT "File system is now read-only due to the potential "
2599 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2600 "system is unmounted.\n");
2601 sb->s_flags |= MS_RDONLY;
2602 ocfs2_set_ro_flag(osb, 0);
2603 }
2604
2605 static char error_buf[1024];
2606
2607 void __ocfs2_error(struct super_block *sb,
2608 const char *function,
2609 const char *fmt, ...)
2610 {
2611 va_list args;
2612
2613 va_start(args, fmt);
2614 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2615 va_end(args);
2616
2617 /* Not using mlog here because we want to show the actual
2618 * function the error came from. */
2619 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2620 sb->s_id, function, error_buf);
2621
2622 ocfs2_handle_error(sb);
2623 }
2624
2625 /* Handle critical errors. This is intentionally more drastic than
2626 * ocfs2_handle_error, so we only use for things like journal errors,
2627 * etc. */
2628 void __ocfs2_abort(struct super_block* sb,
2629 const char *function,
2630 const char *fmt, ...)
2631 {
2632 va_list args;
2633
2634 va_start(args, fmt);
2635 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2636 va_end(args);
2637
2638 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2639 sb->s_id, function, error_buf);
2640
2641 /* We don't have the cluster support yet to go straight to
2642 * hard readonly in here. Until then, we want to keep
2643 * ocfs2_abort() so that we can at least mark critical
2644 * errors.
2645 *
2646 * TODO: This should abort the journal and alert other nodes
2647 * that our slot needs recovery. */
2648
2649 /* Force a panic(). This stinks, but it's better than letting
2650 * things continue without having a proper hard readonly
2651 * here. */
2652 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2653 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2654 ocfs2_handle_error(sb);
2655 }
2656
2657 /*
2658 * Void signal blockers, because in-kernel sigprocmask() only fails
2659 * when SIG_* is wrong.
2660 */
2661 void ocfs2_block_signals(sigset_t *oldset)
2662 {
2663 int rc;
2664 sigset_t blocked;
2665
2666 sigfillset(&blocked);
2667 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2668 BUG_ON(rc);
2669 }
2670
2671 void ocfs2_unblock_signals(sigset_t *oldset)
2672 {
2673 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2674 BUG_ON(rc);
2675 }
2676
2677 module_init(ocfs2_init);
2678 module_exit(ocfs2_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree