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The discovered bit in PGCCSR register indicates if the device has been
[linux-2.6/next.git] / fs / ocfs2 / super.c
blob938e2b2b0c9c9f8635a43ad4686dff675885361f
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/init.h>
32 #include <linux/random.h>
33 #include <linux/statfs.h>
34 #include <linux/moduleparam.h>
35 #include <linux/blkdev.h>
36 #include <linux/socket.h>
37 #include <linux/inet.h>
38 #include <linux/parser.h>
39 #include <linux/crc32.h>
40 #include <linux/debugfs.h>
41 #include <linux/mount.h>
42 #include <linux/seq_file.h>
43 #include <linux/quotaops.h>
44 #include <linux/cleancache.h>
45
46 #define CREATE_TRACE_POINTS
47 #include "ocfs2_trace.h"
48
49 #include <cluster/masklog.h>
50
51 #include "ocfs2.h"
52
53 /* this should be the only file to include a version 1 header */
54 #include "ocfs1_fs_compat.h"
55
56 #include "alloc.h"
57 #include "aops.h"
58 #include "blockcheck.h"
59 #include "dlmglue.h"
60 #include "export.h"
61 #include "extent_map.h"
62 #include "heartbeat.h"
63 #include "inode.h"
64 #include "journal.h"
65 #include "localalloc.h"
66 #include "namei.h"
67 #include "slot_map.h"
68 #include "super.h"
69 #include "sysfile.h"
70 #include "uptodate.h"
71 #include "ver.h"
72 #include "xattr.h"
73 #include "quota.h"
74 #include "refcounttree.h"
75 #include "suballoc.h"
76
77 #include "buffer_head_io.h"
78
79 static struct kmem_cache *ocfs2_inode_cachep = NULL;
80 struct kmem_cache *ocfs2_dquot_cachep;
81 struct kmem_cache *ocfs2_qf_chunk_cachep;
82
83 /* OCFS2 needs to schedule several different types of work which
84 * require cluster locking, disk I/O, recovery waits, etc. Since these
85 * types of work tend to be heavy we avoid using the kernel events
86 * workqueue and schedule on our own. */
87 struct workqueue_struct *ocfs2_wq = NULL;
88
89 static struct dentry *ocfs2_debugfs_root = NULL;
90
91 MODULE_AUTHOR("Oracle");
92 MODULE_LICENSE("GPL");
93
94 struct mount_options
95 {
96 unsigned long commit_interval;
97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
100 int localalloc_opt;
101 unsigned int resv_level;
102 int dir_resv_level;
103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
104 };
105
106 static int ocfs2_parse_options(struct super_block *sb, char *options,
107 struct mount_options *mopt,
108 int is_remount);
109 static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
111 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
112 static void ocfs2_put_super(struct super_block *sb);
113 static int ocfs2_mount_volume(struct super_block *sb);
114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116 static int ocfs2_initialize_mem_caches(void);
117 static void ocfs2_free_mem_caches(void);
118 static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
121
122 static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
127 static int ocfs2_check_volume(struct ocfs2_super *osb);
128 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
136 static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
140 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141 static void ocfs2_destroy_inode(struct inode *inode);
142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
145
146 static const struct super_operations ocfs2_sops = {
147 .statfs = ocfs2_statfs,
148 .alloc_inode = ocfs2_alloc_inode,
149 .destroy_inode = ocfs2_destroy_inode,
150 .drop_inode = ocfs2_drop_inode,
151 .evict_inode = ocfs2_evict_inode,
152 .sync_fs = ocfs2_sync_fs,
153 .put_super = ocfs2_put_super,
154 .remount_fs = ocfs2_remount,
155 .show_options = ocfs2_show_options,
156 .quota_read = ocfs2_quota_read,
157 .quota_write = ocfs2_quota_write,
158 };
159
160 enum {
161 Opt_barrier,
162 Opt_err_panic,
163 Opt_err_ro,
164 Opt_intr,
165 Opt_nointr,
166 Opt_hb_none,
167 Opt_hb_local,
168 Opt_hb_global,
169 Opt_data_ordered,
170 Opt_data_writeback,
171 Opt_atime_quantum,
172 Opt_slot,
173 Opt_commit,
174 Opt_localalloc,
175 Opt_localflocks,
176 Opt_stack,
177 Opt_user_xattr,
178 Opt_nouser_xattr,
179 Opt_inode64,
180 Opt_acl,
181 Opt_noacl,
182 Opt_usrquota,
183 Opt_grpquota,
184 Opt_coherency_buffered,
185 Opt_coherency_full,
186 Opt_resv_level,
187 Opt_dir_resv_level,
188 Opt_err,
189 };
190
191 static const match_table_t tokens = {
192 {Opt_barrier, "barrier=%u"},
193 {Opt_err_panic, "errors=panic"},
194 {Opt_err_ro, "errors=remount-ro"},
195 {Opt_intr, "intr"},
196 {Opt_nointr, "nointr"},
197 {Opt_hb_none, OCFS2_HB_NONE},
198 {Opt_hb_local, OCFS2_HB_LOCAL},
199 {Opt_hb_global, OCFS2_HB_GLOBAL},
200 {Opt_data_ordered, "data=ordered"},
201 {Opt_data_writeback, "data=writeback"},
202 {Opt_atime_quantum, "atime_quantum=%u"},
203 {Opt_slot, "preferred_slot=%u"},
204 {Opt_commit, "commit=%u"},
205 {Opt_localalloc, "localalloc=%d"},
206 {Opt_localflocks, "localflocks"},
207 {Opt_stack, "cluster_stack=%s"},
208 {Opt_user_xattr, "user_xattr"},
209 {Opt_nouser_xattr, "nouser_xattr"},
210 {Opt_inode64, "inode64"},
211 {Opt_acl, "acl"},
212 {Opt_noacl, "noacl"},
213 {Opt_usrquota, "usrquota"},
214 {Opt_grpquota, "grpquota"},
215 {Opt_coherency_buffered, "coherency=buffered"},
216 {Opt_coherency_full, "coherency=full"},
217 {Opt_resv_level, "resv_level=%u"},
218 {Opt_dir_resv_level, "dir_resv_level=%u"},
219 {Opt_err, NULL}
220 };
221
222 #ifdef CONFIG_DEBUG_FS
223 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
224 {
225 struct ocfs2_cluster_connection *cconn = osb->cconn;
226 struct ocfs2_recovery_map *rm = osb->recovery_map;
227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
228 int i, out = 0;
229
230 out += snprintf(buf + out, len - out,
231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
232 "Device", osb->dev_str, osb->uuid_str,
233 osb->fs_generation, osb->vol_label);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => State: %d Flags: 0x%lX\n", "Volume",
237 atomic_read(&osb->vol_state), osb->osb_flags);
238
239 out += snprintf(buf + out, len - out,
240 "%10s => Block: %lu Cluster: %d\n", "Sizes",
241 osb->sb->s_blocksize, osb->s_clustersize);
242
243 out += snprintf(buf + out, len - out,
244 "%10s => Compat: 0x%X Incompat: 0x%X "
245 "ROcompat: 0x%X\n",
246 "Features", osb->s_feature_compat,
247 osb->s_feature_incompat, osb->s_feature_ro_compat);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
251 osb->s_mount_opt, osb->s_atime_quantum);
252
253 if (cconn) {
254 out += snprintf(buf + out, len - out,
255 "%10s => Stack: %s Name: %*s "
256 "Version: %d.%d\n", "Cluster",
257 (*osb->osb_cluster_stack == '\0' ?
258 "o2cb" : osb->osb_cluster_stack),
259 cconn->cc_namelen, cconn->cc_name,
260 cconn->cc_version.pv_major,
261 cconn->cc_version.pv_minor);
262 }
263
264 spin_lock(&osb->dc_task_lock);
265 out += snprintf(buf + out, len - out,
266 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
267 "WorkSeq: %lu\n", "DownCnvt",
268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
269 osb->blocked_lock_count, osb->dc_wake_sequence,
270 osb->dc_work_sequence);
271 spin_unlock(&osb->dc_task_lock);
272
273 spin_lock(&osb->osb_lock);
274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
275 "Recovery",
276 (osb->recovery_thread_task ?
277 task_pid_nr(osb->recovery_thread_task) : -1));
278 if (rm->rm_used == 0)
279 out += snprintf(buf + out, len - out, " None\n");
280 else {
281 for (i = 0; i < rm->rm_used; i++)
282 out += snprintf(buf + out, len - out, " %d",
283 rm->rm_entries[i]);
284 out += snprintf(buf + out, len - out, "\n");
285 }
286 spin_unlock(&osb->osb_lock);
287
288 out += snprintf(buf + out, len - out,
289 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
291 osb->osb_commit_interval,
292 atomic_read(&osb->needs_checkpoint));
293
294 out += snprintf(buf + out, len - out,
295 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
296 "Journal", osb->journal->j_state,
297 osb->journal->j_trans_id,
298 atomic_read(&osb->journal->j_num_trans));
299
300 out += snprintf(buf + out, len - out,
301 "%10s => GlobalAllocs: %d LocalAllocs: %d "
302 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
303 "Stats",
304 atomic_read(&osb->alloc_stats.bitmap_data),
305 atomic_read(&osb->alloc_stats.local_data),
306 atomic_read(&osb->alloc_stats.bg_allocs),
307 atomic_read(&osb->alloc_stats.moves),
308 atomic_read(&osb->alloc_stats.bg_extends));
309
310 out += snprintf(buf + out, len - out,
311 "%10s => State: %u Descriptor: %llu Size: %u bits "
312 "Default: %u bits\n",
313 "LocalAlloc", osb->local_alloc_state,
314 (unsigned long long)osb->la_last_gd,
315 osb->local_alloc_bits, osb->local_alloc_default_bits);
316
317 spin_lock(&osb->osb_lock);
318 out += snprintf(buf + out, len - out,
319 "%10s => InodeSlot: %d StolenInodes: %d, "
320 "MetaSlot: %d StolenMeta: %d\n", "Steal",
321 osb->s_inode_steal_slot,
322 atomic_read(&osb->s_num_inodes_stolen),
323 osb->s_meta_steal_slot,
324 atomic_read(&osb->s_num_meta_stolen));
325 spin_unlock(&osb->osb_lock);
326
327 out += snprintf(buf + out, len - out, "OrphanScan => ");
328 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
329 os->os_count, os->os_seqno);
330 out += snprintf(buf + out, len - out, " Last Scan: ");
331 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
332 out += snprintf(buf + out, len - out, "Disabled\n");
333 else
334 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
335 (get_seconds() - os->os_scantime.tv_sec));
336
337 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
338 "Slots", "Num", "RecoGen");
339 for (i = 0; i < osb->max_slots; ++i) {
340 out += snprintf(buf + out, len - out,
341 "%10s %c %3d %10d\n",
342 " ",
343 (i == osb->slot_num ? '*' : ' '),
344 i, osb->slot_recovery_generations[i]);
345 }
346
347 return out;
348 }
349
350 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
351 {
352 struct ocfs2_super *osb = inode->i_private;
353 char *buf = NULL;
354
355 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356 if (!buf)
357 goto bail;
358
359 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
360
361 file->private_data = buf;
362
363 return 0;
364 bail:
365 return -ENOMEM;
366 }
367
368 static int ocfs2_debug_release(struct inode *inode, struct file *file)
369 {
370 kfree(file->private_data);
371 return 0;
372 }
373
374 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
375 size_t nbytes, loff_t *ppos)
376 {
377 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
378 i_size_read(file->f_mapping->host));
379 }
380 #else
381 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
382 {
383 return 0;
384 }
385 static int ocfs2_debug_release(struct inode *inode, struct file *file)
386 {
387 return 0;
388 }
389 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
390 size_t nbytes, loff_t *ppos)
391 {
392 return 0;
393 }
394 #endif /* CONFIG_DEBUG_FS */
395
396 static const struct file_operations ocfs2_osb_debug_fops = {
397 .open = ocfs2_osb_debug_open,
398 .release = ocfs2_debug_release,
399 .read = ocfs2_debug_read,
400 .llseek = generic_file_llseek,
401 };
402
403 static int ocfs2_sync_fs(struct super_block *sb, int wait)
404 {
405 int status;
406 tid_t target;
407 struct ocfs2_super *osb = OCFS2_SB(sb);
408
409 if (ocfs2_is_hard_readonly(osb))
410 return -EROFS;
411
412 if (wait) {
413 status = ocfs2_flush_truncate_log(osb);
414 if (status < 0)
415 mlog_errno(status);
416 } else {
417 ocfs2_schedule_truncate_log_flush(osb, 0);
418 }
419
420 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
421 &target)) {
422 if (wait)
423 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
424 target);
425 }
426 return 0;
427 }
428
429 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
430 {
431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
432 && (ino == USER_QUOTA_SYSTEM_INODE
433 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
434 return 0;
435 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
436 && (ino == GROUP_QUOTA_SYSTEM_INODE
437 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
438 return 0;
439 return 1;
440 }
441
442 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
443 {
444 struct inode *new = NULL;
445 int status = 0;
446 int i;
447
448 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->root_inode = new;
455
456 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
457 if (IS_ERR(new)) {
458 status = PTR_ERR(new);
459 mlog_errno(status);
460 goto bail;
461 }
462 osb->sys_root_inode = new;
463
464 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
465 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
466 if (!ocfs2_need_system_inode(osb, i))
467 continue;
468 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
469 if (!new) {
470 ocfs2_release_system_inodes(osb);
471 status = -EINVAL;
472 mlog_errno(status);
473 /* FIXME: Should ERROR_RO_FS */
474 mlog(ML_ERROR, "Unable to load system inode %d, "
475 "possibly corrupt fs?", i);
476 goto bail;
477 }
478 // the array now has one ref, so drop this one
479 iput(new);
480 }
481
482 bail:
483 if (status)
484 mlog_errno(status);
485 return status;
486 }
487
488 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
489 {
490 struct inode *new = NULL;
491 int status = 0;
492 int i;
493
494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
495 i < NUM_SYSTEM_INODES;
496 i++) {
497 if (!ocfs2_need_system_inode(osb, i))
498 continue;
499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
500 if (!new) {
501 ocfs2_release_system_inodes(osb);
502 status = -EINVAL;
503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
504 status, i, osb->slot_num);
505 goto bail;
506 }
507 /* the array now has one ref, so drop this one */
508 iput(new);
509 }
510
511 bail:
512 if (status)
513 mlog_errno(status);
514 return status;
515 }
516
517 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
518 {
519 int i;
520 struct inode *inode;
521
522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
523 inode = osb->global_system_inodes[i];
524 if (inode) {
525 iput(inode);
526 osb->global_system_inodes[i] = NULL;
527 }
528 }
529
530 inode = osb->sys_root_inode;
531 if (inode) {
532 iput(inode);
533 osb->sys_root_inode = NULL;
534 }
535
536 inode = osb->root_inode;
537 if (inode) {
538 iput(inode);
539 osb->root_inode = NULL;
540 }
541
542 if (!osb->local_system_inodes)
543 return;
544
545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
546 if (osb->local_system_inodes[i]) {
547 iput(osb->local_system_inodes[i]);
548 osb->local_system_inodes[i] = NULL;
549 }
550 }
551
552 kfree(osb->local_system_inodes);
553 osb->local_system_inodes = NULL;
554 }
555
556 /* We're allocating fs objects, use GFP_NOFS */
557 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
558 {
559 struct ocfs2_inode_info *oi;
560
561 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
562 if (!oi)
563 return NULL;
564
565 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
566 return &oi->vfs_inode;
567 }
568
569 static void ocfs2_i_callback(struct rcu_head *head)
570 {
571 struct inode *inode = container_of(head, struct inode, i_rcu);
572 INIT_LIST_HEAD(&inode->i_dentry);
573 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
574 }
575
576 static void ocfs2_destroy_inode(struct inode *inode)
577 {
578 call_rcu(&inode->i_rcu, ocfs2_i_callback);
579 }
580
581 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
582 unsigned int cbits)
583 {
584 unsigned int bytes = 1 << cbits;
585 unsigned int trim = bytes;
586 unsigned int bitshift = 32;
587
588 /*
589 * i_size and all block offsets in ocfs2 are always 64 bits
590 * wide. i_clusters is 32 bits, in cluster-sized units. So on
591 * 64 bit platforms, cluster size will be the limiting factor.
592 */
593
594 #if BITS_PER_LONG == 32
595 # if defined(CONFIG_LBDAF)
596 BUILD_BUG_ON(sizeof(sector_t) != 8);
597 /*
598 * We might be limited by page cache size.
599 */
600 if (bytes > PAGE_CACHE_SIZE) {
601 bytes = PAGE_CACHE_SIZE;
602 trim = 1;
603 /*
604 * Shift by 31 here so that we don't get larger than
605 * MAX_LFS_FILESIZE
606 */
607 bitshift = 31;
608 }
609 # else
610 /*
611 * We are limited by the size of sector_t. Use block size, as
612 * that's what we expose to the VFS.
613 */
614 bytes = 1 << bbits;
615 trim = 1;
616 bitshift = 31;
617 # endif
618 #endif
619
620 /*
621 * Trim by a whole cluster when we can actually approach the
622 * on-disk limits. Otherwise we can overflow i_clusters when
623 * an extent start is at the max offset.
624 */
625 return (((unsigned long long)bytes) << bitshift) - trim;
626 }
627
628 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
629 {
630 int incompat_features;
631 int ret = 0;
632 struct mount_options parsed_options;
633 struct ocfs2_super *osb = OCFS2_SB(sb);
634 u32 tmp;
635
636 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
637 !ocfs2_check_set_options(sb, &parsed_options)) {
638 ret = -EINVAL;
639 goto out;
640 }
641
642 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
643 OCFS2_MOUNT_HB_NONE;
644 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
645 ret = -EINVAL;
646 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
647 goto out;
648 }
649
650 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
651 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
652 ret = -EINVAL;
653 mlog(ML_ERROR, "Cannot change data mode on remount\n");
654 goto out;
655 }
656
657 /* Probably don't want this on remount; it might
658 * mess with other nodes */
659 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
660 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
661 ret = -EINVAL;
662 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
663 goto out;
664 }
665
666 /* We're going to/from readonly mode. */
667 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
668 /* Disable quota accounting before remounting RO */
669 if (*flags & MS_RDONLY) {
670 ret = ocfs2_susp_quotas(osb, 0);
671 if (ret < 0)
672 goto out;
673 }
674 /* Lock here so the check of HARD_RO and the potential
675 * setting of SOFT_RO is atomic. */
676 spin_lock(&osb->osb_lock);
677 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
678 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
679 ret = -EROFS;
680 goto unlock_osb;
681 }
682
683 if (*flags & MS_RDONLY) {
684 sb->s_flags |= MS_RDONLY;
685 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
686 } else {
687 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
688 mlog(ML_ERROR, "Cannot remount RDWR "
689 "filesystem due to previous errors.\n");
690 ret = -EROFS;
691 goto unlock_osb;
692 }
693 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
694 if (incompat_features) {
695 mlog(ML_ERROR, "Cannot remount RDWR because "
696 "of unsupported optional features "
697 "(%x).\n", incompat_features);
698 ret = -EINVAL;
699 goto unlock_osb;
700 }
701 sb->s_flags &= ~MS_RDONLY;
702 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
703 }
704 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
705 unlock_osb:
706 spin_unlock(&osb->osb_lock);
707 /* Enable quota accounting after remounting RW */
708 if (!ret && !(*flags & MS_RDONLY)) {
709 if (sb_any_quota_suspended(sb))
710 ret = ocfs2_susp_quotas(osb, 1);
711 else
712 ret = ocfs2_enable_quotas(osb);
713 if (ret < 0) {
714 /* Return back changes... */
715 spin_lock(&osb->osb_lock);
716 sb->s_flags |= MS_RDONLY;
717 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
718 spin_unlock(&osb->osb_lock);
719 goto out;
720 }
721 }
722 }
723
724 if (!ret) {
725 /* Only save off the new mount options in case of a successful
726 * remount. */
727 osb->s_mount_opt = parsed_options.mount_opt;
728 osb->s_atime_quantum = parsed_options.atime_quantum;
729 osb->preferred_slot = parsed_options.slot;
730 if (parsed_options.commit_interval)
731 osb->osb_commit_interval = parsed_options.commit_interval;
732
733 if (!ocfs2_is_hard_readonly(osb))
734 ocfs2_set_journal_params(osb);
735
736 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
737 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
738 MS_POSIXACL : 0);
739 }
740 out:
741 return ret;
742 }
743
744 static int ocfs2_sb_probe(struct super_block *sb,
745 struct buffer_head **bh,
746 int *sector_size,
747 struct ocfs2_blockcheck_stats *stats)
748 {
749 int status, tmpstat;
750 struct ocfs1_vol_disk_hdr *hdr;
751 struct ocfs2_dinode *di;
752 int blksize;
753
754 *bh = NULL;
755
756 /* may be > 512 */
757 *sector_size = bdev_logical_block_size(sb->s_bdev);
758 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
759 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
760 *sector_size, OCFS2_MAX_BLOCKSIZE);
761 status = -EINVAL;
762 goto bail;
763 }
764
765 /* Can this really happen? */
766 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
767 *sector_size = OCFS2_MIN_BLOCKSIZE;
768
769 /* check block zero for old format */
770 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
771 if (status < 0) {
772 mlog_errno(status);
773 goto bail;
774 }
775 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
776 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
777 mlog(ML_ERROR, "incompatible version: %u.%u\n",
778 hdr->major_version, hdr->minor_version);
779 status = -EINVAL;
780 }
781 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
782 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
783 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
784 hdr->signature);
785 status = -EINVAL;
786 }
787 brelse(*bh);
788 *bh = NULL;
789 if (status < 0) {
790 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
791 "upgraded before mounting with ocfs v2\n");
792 goto bail;
793 }
794
795 /*
796 * Now check at magic offset for 512, 1024, 2048, 4096
797 * blocksizes. 4096 is the maximum blocksize because it is
798 * the minimum clustersize.
799 */
800 status = -EINVAL;
801 for (blksize = *sector_size;
802 blksize <= OCFS2_MAX_BLOCKSIZE;
803 blksize <<= 1) {
804 tmpstat = ocfs2_get_sector(sb, bh,
805 OCFS2_SUPER_BLOCK_BLKNO,
806 blksize);
807 if (tmpstat < 0) {
808 status = tmpstat;
809 mlog_errno(status);
810 break;
811 }
812 di = (struct ocfs2_dinode *) (*bh)->b_data;
813 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
814 spin_lock_init(&stats->b_lock);
815 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
816 if (tmpstat < 0) {
817 brelse(*bh);
818 *bh = NULL;
819 }
820 if (tmpstat != -EAGAIN) {
821 status = tmpstat;
822 break;
823 }
824 }
825
826 bail:
827 return status;
828 }
829
830 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
831 {
832 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
833
834 if (osb->s_mount_opt & hb_enabled) {
835 if (ocfs2_mount_local(osb)) {
836 mlog(ML_ERROR, "Cannot heartbeat on a locally "
837 "mounted device.\n");
838 return -EINVAL;
839 }
840 if (ocfs2_userspace_stack(osb)) {
841 mlog(ML_ERROR, "Userspace stack expected, but "
842 "o2cb heartbeat arguments passed to mount\n");
843 return -EINVAL;
844 }
845 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
846 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
847 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
848 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
849 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
850 return -EINVAL;
851 }
852 }
853
854 if (!(osb->s_mount_opt & hb_enabled)) {
855 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
856 !ocfs2_userspace_stack(osb)) {
857 mlog(ML_ERROR, "Heartbeat has to be started to mount "
858 "a read-write clustered device.\n");
859 return -EINVAL;
860 }
861 }
862
863 return 0;
864 }
865
866 /*
867 * If we're using a userspace stack, mount should have passed
868 * a name that matches the disk. If not, mount should not
869 * have passed a stack.
870 */
871 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
872 struct mount_options *mopt)
873 {
874 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
875 mlog(ML_ERROR,
876 "cluster stack passed to mount, but this filesystem "
877 "does not support it\n");
878 return -EINVAL;
879 }
880
881 if (ocfs2_userspace_stack(osb) &&
882 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
883 OCFS2_STACK_LABEL_LEN)) {
884 mlog(ML_ERROR,
885 "cluster stack passed to mount (\"%s\") does not "
886 "match the filesystem (\"%s\")\n",
887 mopt->cluster_stack,
888 osb->osb_cluster_stack);
889 return -EINVAL;
890 }
891
892 return 0;
893 }
894
895 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
896 {
897 int type;
898 struct super_block *sb = osb->sb;
899 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
900 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
901 int status = 0;
902
903 for (type = 0; type < MAXQUOTAS; type++) {
904 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
905 continue;
906 if (unsuspend)
907 status = dquot_resume(sb, type);
908 else {
909 struct ocfs2_mem_dqinfo *oinfo;
910
911 /* Cancel periodic syncing before suspending */
912 oinfo = sb_dqinfo(sb, type)->dqi_priv;
913 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
914 status = dquot_suspend(sb, type);
915 }
916 if (status < 0)
917 break;
918 }
919 if (status < 0)
920 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
921 "remount (error = %d).\n", status);
922 return status;
923 }
924
925 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
926 {
927 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
928 struct super_block *sb = osb->sb;
929 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
930 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
931 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
932 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
933 int status;
934 int type;
935
936 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
937 for (type = 0; type < MAXQUOTAS; type++) {
938 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
939 continue;
940 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
941 osb->slot_num);
942 if (!inode[type]) {
943 status = -ENOENT;
944 goto out_quota_off;
945 }
946 status = dquot_enable(inode[type], type, QFMT_OCFS2,
947 DQUOT_USAGE_ENABLED);
948 if (status < 0)
949 goto out_quota_off;
950 }
951
952 for (type = 0; type < MAXQUOTAS; type++)
953 iput(inode[type]);
954 return 0;
955 out_quota_off:
956 ocfs2_disable_quotas(osb);
957 for (type = 0; type < MAXQUOTAS; type++)
958 iput(inode[type]);
959 mlog_errno(status);
960 return status;
961 }
962
963 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
964 {
965 int type;
966 struct inode *inode;
967 struct super_block *sb = osb->sb;
968 struct ocfs2_mem_dqinfo *oinfo;
969
970 /* We mostly ignore errors in this function because there's not much
971 * we can do when we see them */
972 for (type = 0; type < MAXQUOTAS; type++) {
973 if (!sb_has_quota_loaded(sb, type))
974 continue;
975 /* Cancel periodic syncing before we grab dqonoff_mutex */
976 oinfo = sb_dqinfo(sb, type)->dqi_priv;
977 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
978 inode = igrab(sb->s_dquot.files[type]);
979 /* Turn off quotas. This will remove all dquot structures from
980 * memory and so they will be automatically synced to global
981 * quota files */
982 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
983 DQUOT_LIMITS_ENABLED);
984 if (!inode)
985 continue;
986 iput(inode);
987 }
988 }
989
990 /* Handle quota on quotactl */
991 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
992 {
993 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
994 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
995
996 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
997 return -EINVAL;
998
999 return dquot_enable(sb_dqopt(sb)->files[type], type,
1000 format_id, DQUOT_LIMITS_ENABLED);
1001 }
1002
1003 /* Handle quota off quotactl */
1004 static int ocfs2_quota_off(struct super_block *sb, int type)
1005 {
1006 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1007 }
1008
1009 static const struct quotactl_ops ocfs2_quotactl_ops = {
1010 .quota_on_meta = ocfs2_quota_on,
1011 .quota_off = ocfs2_quota_off,
1012 .quota_sync = dquot_quota_sync,
1013 .get_info = dquot_get_dqinfo,
1014 .set_info = dquot_set_dqinfo,
1015 .get_dqblk = dquot_get_dqblk,
1016 .set_dqblk = dquot_set_dqblk,
1017 };
1018
1019 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1020 {
1021 struct dentry *root;
1022 int status, sector_size;
1023 struct mount_options parsed_options;
1024 struct inode *inode = NULL;
1025 struct ocfs2_super *osb = NULL;
1026 struct buffer_head *bh = NULL;
1027 char nodestr[8];
1028 struct ocfs2_blockcheck_stats stats;
1029
1030 trace_ocfs2_fill_super(sb, data, silent);
1031
1032 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1033 status = -EINVAL;
1034 goto read_super_error;
1035 }
1036
1037 /* probe for superblock */
1038 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1039 if (status < 0) {
1040 mlog(ML_ERROR, "superblock probe failed!\n");
1041 goto read_super_error;
1042 }
1043
1044 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1045 osb = OCFS2_SB(sb);
1046 if (status < 0) {
1047 mlog_errno(status);
1048 goto read_super_error;
1049 }
1050 brelse(bh);
1051 bh = NULL;
1052
1053 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1054 status = -EINVAL;
1055 goto read_super_error;
1056 }
1057 osb->s_mount_opt = parsed_options.mount_opt;
1058 osb->s_atime_quantum = parsed_options.atime_quantum;
1059 osb->preferred_slot = parsed_options.slot;
1060 osb->osb_commit_interval = parsed_options.commit_interval;
1061
1062 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1063 osb->osb_resv_level = parsed_options.resv_level;
1064 osb->osb_dir_resv_level = parsed_options.resv_level;
1065 if (parsed_options.dir_resv_level == -1)
1066 osb->osb_dir_resv_level = parsed_options.resv_level;
1067 else
1068 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1069
1070 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1071 if (status)
1072 goto read_super_error;
1073
1074 sb->s_magic = OCFS2_SUPER_MAGIC;
1075
1076 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1077 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1078
1079 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1080 * heartbeat=none */
1081 if (bdev_read_only(sb->s_bdev)) {
1082 if (!(sb->s_flags & MS_RDONLY)) {
1083 status = -EACCES;
1084 mlog(ML_ERROR, "Readonly device detected but readonly "
1085 "mount was not specified.\n");
1086 goto read_super_error;
1087 }
1088
1089 /* You should not be able to start a local heartbeat
1090 * on a readonly device. */
1091 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1092 status = -EROFS;
1093 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1094 "device.\n");
1095 goto read_super_error;
1096 }
1097
1098 status = ocfs2_check_journals_nolocks(osb);
1099 if (status < 0) {
1100 if (status == -EROFS)
1101 mlog(ML_ERROR, "Recovery required on readonly "
1102 "file system, but write access is "
1103 "unavailable.\n");
1104 else
1105 mlog_errno(status);
1106 goto read_super_error;
1107 }
1108
1109 ocfs2_set_ro_flag(osb, 1);
1110
1111 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1112 "Cluster services will not be used for this mount. "
1113 "Recovery will be skipped.\n", osb->dev_str);
1114 }
1115
1116 if (!ocfs2_is_hard_readonly(osb)) {
1117 if (sb->s_flags & MS_RDONLY)
1118 ocfs2_set_ro_flag(osb, 0);
1119 }
1120
1121 status = ocfs2_verify_heartbeat(osb);
1122 if (status < 0) {
1123 mlog_errno(status);
1124 goto read_super_error;
1125 }
1126
1127 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1128 ocfs2_debugfs_root);
1129 if (!osb->osb_debug_root) {
1130 status = -EINVAL;
1131 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1132 goto read_super_error;
1133 }
1134
1135 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1136 osb->osb_debug_root,
1137 osb,
1138 &ocfs2_osb_debug_fops);
1139 if (!osb->osb_ctxt) {
1140 status = -EINVAL;
1141 mlog_errno(status);
1142 goto read_super_error;
1143 }
1144
1145 if (ocfs2_meta_ecc(osb)) {
1146 status = ocfs2_blockcheck_stats_debugfs_install(
1147 &osb->osb_ecc_stats,
1148 osb->osb_debug_root);
1149 if (status) {
1150 mlog(ML_ERROR,
1151 "Unable to create blockcheck statistics "
1152 "files\n");
1153 goto read_super_error;
1154 }
1155 }
1156
1157 status = ocfs2_mount_volume(sb);
1158 if (osb->root_inode)
1159 inode = igrab(osb->root_inode);
1160
1161 if (status < 0)
1162 goto read_super_error;
1163
1164 if (!inode) {
1165 status = -EIO;
1166 mlog_errno(status);
1167 goto read_super_error;
1168 }
1169
1170 root = d_alloc_root(inode);
1171 if (!root) {
1172 status = -ENOMEM;
1173 mlog_errno(status);
1174 goto read_super_error;
1175 }
1176
1177 sb->s_root = root;
1178
1179 ocfs2_complete_mount_recovery(osb);
1180
1181 if (ocfs2_mount_local(osb))
1182 snprintf(nodestr, sizeof(nodestr), "local");
1183 else
1184 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1185
1186 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1187 "with %s data mode.\n",
1188 osb->dev_str, nodestr, osb->slot_num,
1189 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1190 "ordered");
1191
1192 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1193 wake_up(&osb->osb_mount_event);
1194
1195 /* Now we can initialize quotas because we can afford to wait
1196 * for cluster locks recovery now. That also means that truncation
1197 * log recovery can happen but that waits for proper quota setup */
1198 if (!(sb->s_flags & MS_RDONLY)) {
1199 status = ocfs2_enable_quotas(osb);
1200 if (status < 0) {
1201 /* We have to err-out specially here because
1202 * s_root is already set */
1203 mlog_errno(status);
1204 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1205 wake_up(&osb->osb_mount_event);
1206 return status;
1207 }
1208 }
1209
1210 ocfs2_complete_quota_recovery(osb);
1211
1212 /* Now we wake up again for processes waiting for quotas */
1213 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1214 wake_up(&osb->osb_mount_event);
1215
1216 /* Start this when the mount is almost sure of being successful */
1217 ocfs2_orphan_scan_start(osb);
1218
1219 return status;
1220
1221 read_super_error:
1222 brelse(bh);
1223
1224 if (inode)
1225 iput(inode);
1226
1227 if (osb) {
1228 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1229 wake_up(&osb->osb_mount_event);
1230 ocfs2_dismount_volume(sb, 1);
1231 }
1232
1233 if (status)
1234 mlog_errno(status);
1235 return status;
1236 }
1237
1238 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1239 int flags,
1240 const char *dev_name,
1241 void *data)
1242 {
1243 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1244 }
1245
1246 static void ocfs2_kill_sb(struct super_block *sb)
1247 {
1248 struct ocfs2_super *osb = OCFS2_SB(sb);
1249
1250 /* Failed mount? */
1251 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1252 goto out;
1253
1254 /* Prevent further queueing of inode drop events */
1255 spin_lock(&dentry_list_lock);
1256 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1257 spin_unlock(&dentry_list_lock);
1258 /* Wait for work to finish and/or remove it */
1259 cancel_work_sync(&osb->dentry_lock_work);
1260 out:
1261 kill_block_super(sb);
1262 }
1263
1264 static struct file_system_type ocfs2_fs_type = {
1265 .owner = THIS_MODULE,
1266 .name = "ocfs2",
1267 .mount = ocfs2_mount,
1268 .kill_sb = ocfs2_kill_sb,
1269
1270 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1271 .next = NULL
1272 };
1273
1274 static int ocfs2_check_set_options(struct super_block *sb,
1275 struct mount_options *options)
1276 {
1277 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1278 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1279 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1280 mlog(ML_ERROR, "User quotas were requested, but this "
1281 "filesystem does not have the feature enabled.\n");
1282 return 0;
1283 }
1284 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1285 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1286 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1287 mlog(ML_ERROR, "Group 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_POSIX_ACL &&
1292 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1293 mlog(ML_ERROR, "ACL support requested but extended attributes "
1294 "feature is not enabled\n");
1295 return 0;
1296 }
1297 /* No ACL setting specified? Use XATTR feature... */
1298 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1299 OCFS2_MOUNT_NO_POSIX_ACL))) {
1300 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1301 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1302 else
1303 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1304 }
1305 return 1;
1306 }
1307
1308 static int ocfs2_parse_options(struct super_block *sb,
1309 char *options,
1310 struct mount_options *mopt,
1311 int is_remount)
1312 {
1313 int status, user_stack = 0;
1314 char *p;
1315 u32 tmp;
1316
1317 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1318
1319 mopt->commit_interval = 0;
1320 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1321 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1322 mopt->slot = OCFS2_INVALID_SLOT;
1323 mopt->localalloc_opt = -1;
1324 mopt->cluster_stack[0] = '\0';
1325 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1326 mopt->dir_resv_level = -1;
1327
1328 if (!options) {
1329 status = 1;
1330 goto bail;
1331 }
1332
1333 while ((p = strsep(&options, ",")) != NULL) {
1334 int token, option;
1335 substring_t args[MAX_OPT_ARGS];
1336
1337 if (!*p)
1338 continue;
1339
1340 token = match_token(p, tokens, args);
1341 switch (token) {
1342 case Opt_hb_local:
1343 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1344 break;
1345 case Opt_hb_none:
1346 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1347 break;
1348 case Opt_hb_global:
1349 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1350 break;
1351 case Opt_barrier:
1352 if (match_int(&args[0], &option)) {
1353 status = 0;
1354 goto bail;
1355 }
1356 if (option)
1357 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1358 else
1359 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1360 break;
1361 case Opt_intr:
1362 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1363 break;
1364 case Opt_nointr:
1365 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1366 break;
1367 case Opt_err_panic:
1368 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1369 break;
1370 case Opt_err_ro:
1371 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1372 break;
1373 case Opt_data_ordered:
1374 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1375 break;
1376 case Opt_data_writeback:
1377 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1378 break;
1379 case Opt_user_xattr:
1380 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1381 break;
1382 case Opt_nouser_xattr:
1383 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1384 break;
1385 case Opt_atime_quantum:
1386 if (match_int(&args[0], &option)) {
1387 status = 0;
1388 goto bail;
1389 }
1390 if (option >= 0)
1391 mopt->atime_quantum = option;
1392 break;
1393 case Opt_slot:
1394 option = 0;
1395 if (match_int(&args[0], &option)) {
1396 status = 0;
1397 goto bail;
1398 }
1399 if (option)
1400 mopt->slot = (s16)option;
1401 break;
1402 case Opt_commit:
1403 option = 0;
1404 if (match_int(&args[0], &option)) {
1405 status = 0;
1406 goto bail;
1407 }
1408 if (option < 0)
1409 return 0;
1410 if (option == 0)
1411 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1412 mopt->commit_interval = HZ * option;
1413 break;
1414 case Opt_localalloc:
1415 option = 0;
1416 if (match_int(&args[0], &option)) {
1417 status = 0;
1418 goto bail;
1419 }
1420 if (option >= 0)
1421 mopt->localalloc_opt = option;
1422 break;
1423 case Opt_localflocks:
1424 /*
1425 * Changing this during remount could race
1426 * flock() requests, or "unbalance" existing
1427 * ones (e.g., a lock is taken in one mode but
1428 * dropped in the other). If users care enough
1429 * to flip locking modes during remount, we
1430 * could add a "local" flag to individual
1431 * flock structures for proper tracking of
1432 * state.
1433 */
1434 if (!is_remount)
1435 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1436 break;
1437 case Opt_stack:
1438 /* Check both that the option we were passed
1439 * is of the right length and that it is a proper
1440 * string of the right length.
1441 */
1442 if (((args[0].to - args[0].from) !=
1443 OCFS2_STACK_LABEL_LEN) ||
1444 (strnlen(args[0].from,
1445 OCFS2_STACK_LABEL_LEN) !=
1446 OCFS2_STACK_LABEL_LEN)) {
1447 mlog(ML_ERROR,
1448 "Invalid cluster_stack option\n");
1449 status = 0;
1450 goto bail;
1451 }
1452 memcpy(mopt->cluster_stack, args[0].from,
1453 OCFS2_STACK_LABEL_LEN);
1454 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1455 /*
1456 * Open code the memcmp here as we don't have
1457 * an osb to pass to
1458 * ocfs2_userspace_stack().
1459 */
1460 if (memcmp(mopt->cluster_stack,
1461 OCFS2_CLASSIC_CLUSTER_STACK,
1462 OCFS2_STACK_LABEL_LEN))
1463 user_stack = 1;
1464 break;
1465 case Opt_inode64:
1466 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1467 break;
1468 case Opt_usrquota:
1469 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1470 break;
1471 case Opt_grpquota:
1472 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1473 break;
1474 case Opt_coherency_buffered:
1475 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1476 break;
1477 case Opt_coherency_full:
1478 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1479 break;
1480 case Opt_acl:
1481 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1482 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1483 break;
1484 case Opt_noacl:
1485 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1486 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1487 break;
1488 case Opt_resv_level:
1489 if (is_remount)
1490 break;
1491 if (match_int(&args[0], &option)) {
1492 status = 0;
1493 goto bail;
1494 }
1495 if (option >= OCFS2_MIN_RESV_LEVEL &&
1496 option < OCFS2_MAX_RESV_LEVEL)
1497 mopt->resv_level = option;
1498 break;
1499 case Opt_dir_resv_level:
1500 if (is_remount)
1501 break;
1502 if (match_int(&args[0], &option)) {
1503 status = 0;
1504 goto bail;
1505 }
1506 if (option >= OCFS2_MIN_RESV_LEVEL &&
1507 option < OCFS2_MAX_RESV_LEVEL)
1508 mopt->dir_resv_level = option;
1509 break;
1510 default:
1511 mlog(ML_ERROR,
1512 "Unrecognized mount option \"%s\" "
1513 "or missing value\n", p);
1514 status = 0;
1515 goto bail;
1516 }
1517 }
1518
1519 if (user_stack == 0) {
1520 /* Ensure only one heartbeat mode */
1521 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1522 OCFS2_MOUNT_HB_GLOBAL |
1523 OCFS2_MOUNT_HB_NONE);
1524 if (hweight32(tmp) != 1) {
1525 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1526 status = 0;
1527 goto bail;
1528 }
1529 }
1530
1531 status = 1;
1532
1533 bail:
1534 return status;
1535 }
1536
1537 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1538 {
1539 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1540 unsigned long opts = osb->s_mount_opt;
1541 unsigned int local_alloc_megs;
1542
1543 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1544 seq_printf(s, ",_netdev");
1545 if (opts & OCFS2_MOUNT_HB_LOCAL)
1546 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1547 else
1548 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1549 } else
1550 seq_printf(s, ",%s", OCFS2_HB_NONE);
1551
1552 if (opts & OCFS2_MOUNT_NOINTR)
1553 seq_printf(s, ",nointr");
1554
1555 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1556 seq_printf(s, ",data=writeback");
1557 else
1558 seq_printf(s, ",data=ordered");
1559
1560 if (opts & OCFS2_MOUNT_BARRIER)
1561 seq_printf(s, ",barrier=1");
1562
1563 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1564 seq_printf(s, ",errors=panic");
1565 else
1566 seq_printf(s, ",errors=remount-ro");
1567
1568 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1569 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1570
1571 if (!(mnt->mnt_flags & MNT_NOATIME) && !(mnt->mnt_flags & MNT_RELATIME))
1572 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1573
1574 if (osb->osb_commit_interval)
1575 seq_printf(s, ",commit=%u",
1576 (unsigned) (osb->osb_commit_interval / HZ));
1577
1578 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1579 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1580 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1581
1582 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1583 seq_printf(s, ",localflocks,");
1584
1585 if (osb->osb_cluster_stack[0])
1586 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1587 osb->osb_cluster_stack);
1588 if (opts & OCFS2_MOUNT_USRQUOTA)
1589 seq_printf(s, ",usrquota");
1590 if (opts & OCFS2_MOUNT_GRPQUOTA)
1591 seq_printf(s, ",grpquota");
1592
1593 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1594 seq_printf(s, ",coherency=buffered");
1595 else
1596 seq_printf(s, ",coherency=full");
1597
1598 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1599 seq_printf(s, ",nouser_xattr");
1600 else
1601 seq_printf(s, ",user_xattr");
1602
1603 if (opts & OCFS2_MOUNT_INODE64)
1604 seq_printf(s, ",inode64");
1605
1606 if (opts & OCFS2_MOUNT_POSIX_ACL)
1607 seq_printf(s, ",acl");
1608 else
1609 seq_printf(s, ",noacl");
1610
1611 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1612 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1613
1614 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1615 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1616
1617 return 0;
1618 }
1619
1620 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ];
1621
1622 static int __init ocfs2_init(void)
1623 {
1624 int status, i;
1625
1626 ocfs2_print_version();
1627
1628 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++)
1629 init_waitqueue_head(&ocfs2__ioend_wq[i]);
1630
1631 status = init_ocfs2_uptodate_cache();
1632 if (status < 0) {
1633 mlog_errno(status);
1634 goto leave;
1635 }
1636
1637 status = ocfs2_initialize_mem_caches();
1638 if (status < 0) {
1639 mlog_errno(status);
1640 goto leave;
1641 }
1642
1643 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1644 if (!ocfs2_wq) {
1645 status = -ENOMEM;
1646 goto leave;
1647 }
1648
1649 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1650 if (!ocfs2_debugfs_root) {
1651 status = -EFAULT;
1652 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1653 }
1654
1655 ocfs2_set_locking_protocol();
1656
1657 status = register_quota_format(&ocfs2_quota_format);
1658 leave:
1659 if (status < 0) {
1660 ocfs2_free_mem_caches();
1661 exit_ocfs2_uptodate_cache();
1662 mlog_errno(status);
1663 }
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 if (ocfs2_wq) {
1674 flush_workqueue(ocfs2_wq);
1675 destroy_workqueue(ocfs2_wq);
1676 }
1677
1678 unregister_quota_format(&ocfs2_quota_format);
1679
1680 debugfs_remove(ocfs2_debugfs_root);
1681
1682 ocfs2_free_mem_caches();
1683
1684 unregister_filesystem(&ocfs2_fs_type);
1685
1686 exit_ocfs2_uptodate_cache();
1687 }
1688
1689 static void ocfs2_put_super(struct super_block *sb)
1690 {
1691 trace_ocfs2_put_super(sb);
1692
1693 ocfs2_sync_blockdev(sb);
1694 ocfs2_dismount_volume(sb, 0);
1695 }
1696
1697 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1698 {
1699 struct ocfs2_super *osb;
1700 u32 numbits, freebits;
1701 int status;
1702 struct ocfs2_dinode *bm_lock;
1703 struct buffer_head *bh = NULL;
1704 struct inode *inode = NULL;
1705
1706 trace_ocfs2_statfs(dentry->d_sb, buf);
1707
1708 osb = OCFS2_SB(dentry->d_sb);
1709
1710 inode = ocfs2_get_system_file_inode(osb,
1711 GLOBAL_BITMAP_SYSTEM_INODE,
1712 OCFS2_INVALID_SLOT);
1713 if (!inode) {
1714 mlog(ML_ERROR, "failed to get bitmap inode\n");
1715 status = -EIO;
1716 goto bail;
1717 }
1718
1719 status = ocfs2_inode_lock(inode, &bh, 0);
1720 if (status < 0) {
1721 mlog_errno(status);
1722 goto bail;
1723 }
1724
1725 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1726
1727 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1728 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1729
1730 buf->f_type = OCFS2_SUPER_MAGIC;
1731 buf->f_bsize = dentry->d_sb->s_blocksize;
1732 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1733 buf->f_blocks = ((sector_t) numbits) *
1734 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1735 buf->f_bfree = ((sector_t) freebits) *
1736 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1737 buf->f_bavail = buf->f_bfree;
1738 buf->f_files = numbits;
1739 buf->f_ffree = freebits;
1740 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1741 & 0xFFFFFFFFUL;
1742 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1743 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1744
1745 brelse(bh);
1746
1747 ocfs2_inode_unlock(inode, 0);
1748 status = 0;
1749 bail:
1750 if (inode)
1751 iput(inode);
1752
1753 if (status)
1754 mlog_errno(status);
1755
1756 return status;
1757 }
1758
1759 static void ocfs2_inode_init_once(void *data)
1760 {
1761 struct ocfs2_inode_info *oi = data;
1762
1763 oi->ip_flags = 0;
1764 oi->ip_open_count = 0;
1765 spin_lock_init(&oi->ip_lock);
1766 ocfs2_extent_map_init(&oi->vfs_inode);
1767 INIT_LIST_HEAD(&oi->ip_io_markers);
1768 oi->ip_dir_start_lookup = 0;
1769 atomic_set(&oi->ip_unaligned_aio, 0);
1770 init_rwsem(&oi->ip_alloc_sem);
1771 init_rwsem(&oi->ip_xattr_sem);
1772 mutex_init(&oi->ip_io_mutex);
1773
1774 oi->ip_blkno = 0ULL;
1775 oi->ip_clusters = 0;
1776
1777 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1778
1779 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1780 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1781 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1782
1783 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1784 &ocfs2_inode_caching_ops);
1785
1786 inode_init_once(&oi->vfs_inode);
1787 }
1788
1789 static int ocfs2_initialize_mem_caches(void)
1790 {
1791 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1792 sizeof(struct ocfs2_inode_info),
1793 0,
1794 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1795 SLAB_MEM_SPREAD),
1796 ocfs2_inode_init_once);
1797 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1798 sizeof(struct ocfs2_dquot),
1799 0,
1800 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1801 SLAB_MEM_SPREAD),
1802 NULL);
1803 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1804 sizeof(struct ocfs2_quota_chunk),
1805 0,
1806 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1807 NULL);
1808 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1809 !ocfs2_qf_chunk_cachep) {
1810 if (ocfs2_inode_cachep)
1811 kmem_cache_destroy(ocfs2_inode_cachep);
1812 if (ocfs2_dquot_cachep)
1813 kmem_cache_destroy(ocfs2_dquot_cachep);
1814 if (ocfs2_qf_chunk_cachep)
1815 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1816 return -ENOMEM;
1817 }
1818
1819 return 0;
1820 }
1821
1822 static void ocfs2_free_mem_caches(void)
1823 {
1824 if (ocfs2_inode_cachep)
1825 kmem_cache_destroy(ocfs2_inode_cachep);
1826 ocfs2_inode_cachep = NULL;
1827
1828 if (ocfs2_dquot_cachep)
1829 kmem_cache_destroy(ocfs2_dquot_cachep);
1830 ocfs2_dquot_cachep = NULL;
1831
1832 if (ocfs2_qf_chunk_cachep)
1833 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1834 ocfs2_qf_chunk_cachep = NULL;
1835 }
1836
1837 static int ocfs2_get_sector(struct super_block *sb,
1838 struct buffer_head **bh,
1839 int block,
1840 int sect_size)
1841 {
1842 if (!sb_set_blocksize(sb, sect_size)) {
1843 mlog(ML_ERROR, "unable to set blocksize\n");
1844 return -EIO;
1845 }
1846
1847 *bh = sb_getblk(sb, block);
1848 if (!*bh) {
1849 mlog_errno(-EIO);
1850 return -EIO;
1851 }
1852 lock_buffer(*bh);
1853 if (!buffer_dirty(*bh))
1854 clear_buffer_uptodate(*bh);
1855 unlock_buffer(*bh);
1856 ll_rw_block(READ, 1, bh);
1857 wait_on_buffer(*bh);
1858 if (!buffer_uptodate(*bh)) {
1859 mlog_errno(-EIO);
1860 brelse(*bh);
1861 *bh = NULL;
1862 return -EIO;
1863 }
1864
1865 return 0;
1866 }
1867
1868 static int ocfs2_mount_volume(struct super_block *sb)
1869 {
1870 int status = 0;
1871 int unlock_super = 0;
1872 struct ocfs2_super *osb = OCFS2_SB(sb);
1873
1874 if (ocfs2_is_hard_readonly(osb))
1875 goto leave;
1876
1877 status = ocfs2_dlm_init(osb);
1878 if (status < 0) {
1879 mlog_errno(status);
1880 goto leave;
1881 }
1882
1883 status = ocfs2_super_lock(osb, 1);
1884 if (status < 0) {
1885 mlog_errno(status);
1886 goto leave;
1887 }
1888 unlock_super = 1;
1889
1890 /* This will load up the node map and add ourselves to it. */
1891 status = ocfs2_find_slot(osb);
1892 if (status < 0) {
1893 mlog_errno(status);
1894 goto leave;
1895 }
1896
1897 /* load all node-local system inodes */
1898 status = ocfs2_init_local_system_inodes(osb);
1899 if (status < 0) {
1900 mlog_errno(status);
1901 goto leave;
1902 }
1903
1904 status = ocfs2_check_volume(osb);
1905 if (status < 0) {
1906 mlog_errno(status);
1907 goto leave;
1908 }
1909
1910 status = ocfs2_truncate_log_init(osb);
1911 if (status < 0)
1912 mlog_errno(status);
1913
1914 leave:
1915 if (unlock_super)
1916 ocfs2_super_unlock(osb, 1);
1917
1918 return status;
1919 }
1920
1921 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1922 {
1923 int tmp, hangup_needed = 0;
1924 struct ocfs2_super *osb = NULL;
1925 char nodestr[8];
1926
1927 trace_ocfs2_dismount_volume(sb);
1928
1929 BUG_ON(!sb);
1930 osb = OCFS2_SB(sb);
1931 BUG_ON(!osb);
1932
1933 debugfs_remove(osb->osb_ctxt);
1934
1935 /*
1936 * Flush inode dropping work queue so that deletes are
1937 * performed while the filesystem is still working
1938 */
1939 ocfs2_drop_all_dl_inodes(osb);
1940
1941 /* Orphan scan should be stopped as early as possible */
1942 ocfs2_orphan_scan_stop(osb);
1943
1944 ocfs2_disable_quotas(osb);
1945
1946 ocfs2_shutdown_local_alloc(osb);
1947
1948 ocfs2_truncate_log_shutdown(osb);
1949
1950 /* This will disable recovery and flush any recovery work. */
1951 ocfs2_recovery_exit(osb);
1952
1953 ocfs2_journal_shutdown(osb);
1954
1955 ocfs2_sync_blockdev(sb);
1956
1957 ocfs2_purge_refcount_trees(osb);
1958
1959 /* No cluster connection means we've failed during mount, so skip
1960 * all the steps which depended on that to complete. */
1961 if (osb->cconn) {
1962 tmp = ocfs2_super_lock(osb, 1);
1963 if (tmp < 0) {
1964 mlog_errno(tmp);
1965 return;
1966 }
1967 }
1968
1969 if (osb->slot_num != OCFS2_INVALID_SLOT)
1970 ocfs2_put_slot(osb);
1971
1972 if (osb->cconn)
1973 ocfs2_super_unlock(osb, 1);
1974
1975 ocfs2_release_system_inodes(osb);
1976
1977 /*
1978 * If we're dismounting due to mount error, mount.ocfs2 will clean
1979 * up heartbeat. If we're a local mount, there is no heartbeat.
1980 * If we failed before we got a uuid_str yet, we can't stop
1981 * heartbeat. Otherwise, do it.
1982 */
1983 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1984 !ocfs2_is_hard_readonly(osb))
1985 hangup_needed = 1;
1986
1987 if (osb->cconn)
1988 ocfs2_dlm_shutdown(osb, hangup_needed);
1989
1990 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1991 debugfs_remove(osb->osb_debug_root);
1992
1993 if (hangup_needed)
1994 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1995
1996 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1997
1998 if (ocfs2_mount_local(osb))
1999 snprintf(nodestr, sizeof(nodestr), "local");
2000 else
2001 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2002
2003 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2004 osb->dev_str, nodestr);
2005
2006 ocfs2_delete_osb(osb);
2007 kfree(osb);
2008 sb->s_dev = 0;
2009 sb->s_fs_info = NULL;
2010 }
2011
2012 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2013 unsigned uuid_bytes)
2014 {
2015 int i, ret;
2016 char *ptr;
2017
2018 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2019
2020 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2021 if (osb->uuid_str == NULL)
2022 return -ENOMEM;
2023
2024 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2025 /* print with null */
2026 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2027 if (ret != 2) /* drop super cleans up */
2028 return -EINVAL;
2029 /* then only advance past the last char */
2030 ptr += 2;
2031 }
2032
2033 return 0;
2034 }
2035
2036 /* Make sure entire volume is addressable by our journal. Requires
2037 osb_clusters_at_boot to be valid and for the journal to have been
2038 initialized by ocfs2_journal_init(). */
2039 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2040 {
2041 int status = 0;
2042 u64 max_block =
2043 ocfs2_clusters_to_blocks(osb->sb,
2044 osb->osb_clusters_at_boot) - 1;
2045
2046 /* 32-bit block number is always OK. */
2047 if (max_block <= (u32)~0ULL)
2048 goto out;
2049
2050 /* Volume is "huge", so see if our journal is new enough to
2051 support it. */
2052 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2053 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2054 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2055 JBD2_FEATURE_INCOMPAT_64BIT))) {
2056 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2057 "Enable the 'block64' journal option with tunefs.ocfs2");
2058 status = -EFBIG;
2059 goto out;
2060 }
2061
2062 out:
2063 return status;
2064 }
2065
2066 static int ocfs2_initialize_super(struct super_block *sb,
2067 struct buffer_head *bh,
2068 int sector_size,
2069 struct ocfs2_blockcheck_stats *stats)
2070 {
2071 int status;
2072 int i, cbits, bbits;
2073 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2074 struct inode *inode = NULL;
2075 struct ocfs2_journal *journal;
2076 __le32 uuid_net_key;
2077 struct ocfs2_super *osb;
2078 u64 total_blocks;
2079
2080 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2081 if (!osb) {
2082 status = -ENOMEM;
2083 mlog_errno(status);
2084 goto bail;
2085 }
2086
2087 sb->s_fs_info = osb;
2088 sb->s_op = &ocfs2_sops;
2089 sb->s_d_op = &ocfs2_dentry_ops;
2090 sb->s_export_op = &ocfs2_export_ops;
2091 sb->s_qcop = &ocfs2_quotactl_ops;
2092 sb->dq_op = &ocfs2_quota_operations;
2093 sb->s_xattr = ocfs2_xattr_handlers;
2094 sb->s_time_gran = 1;
2095 sb->s_flags |= MS_NOATIME;
2096 /* this is needed to support O_LARGEFILE */
2097 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2098 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2099 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2100
2101 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2102
2103 for (i = 0; i < 3; i++)
2104 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2105 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2106
2107 osb->sb = sb;
2108 /* Save off for ocfs2_rw_direct */
2109 osb->s_sectsize_bits = blksize_bits(sector_size);
2110 BUG_ON(!osb->s_sectsize_bits);
2111
2112 spin_lock_init(&osb->dc_task_lock);
2113 init_waitqueue_head(&osb->dc_event);
2114 osb->dc_work_sequence = 0;
2115 osb->dc_wake_sequence = 0;
2116 INIT_LIST_HEAD(&osb->blocked_lock_list);
2117 osb->blocked_lock_count = 0;
2118 spin_lock_init(&osb->osb_lock);
2119 spin_lock_init(&osb->osb_xattr_lock);
2120 ocfs2_init_steal_slots(osb);
2121
2122 atomic_set(&osb->alloc_stats.moves, 0);
2123 atomic_set(&osb->alloc_stats.local_data, 0);
2124 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2125 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2126 atomic_set(&osb->alloc_stats.bg_extends, 0);
2127
2128 /* Copy the blockcheck stats from the superblock probe */
2129 osb->osb_ecc_stats = *stats;
2130
2131 ocfs2_init_node_maps(osb);
2132
2133 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2134 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2135
2136 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2137 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2138 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2139 osb->max_slots);
2140 status = -EINVAL;
2141 goto bail;
2142 }
2143
2144 ocfs2_orphan_scan_init(osb);
2145
2146 status = ocfs2_recovery_init(osb);
2147 if (status) {
2148 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2149 mlog_errno(status);
2150 goto bail;
2151 }
2152
2153 init_waitqueue_head(&osb->checkpoint_event);
2154 atomic_set(&osb->needs_checkpoint, 0);
2155
2156 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2157
2158 osb->slot_num = OCFS2_INVALID_SLOT;
2159
2160 osb->s_xattr_inline_size = le16_to_cpu(
2161 di->id2.i_super.s_xattr_inline_size);
2162
2163 osb->local_alloc_state = OCFS2_LA_UNUSED;
2164 osb->local_alloc_bh = NULL;
2165 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2166
2167 init_waitqueue_head(&osb->osb_mount_event);
2168
2169 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2170 if (status) {
2171 mlog_errno(status);
2172 goto bail;
2173 }
2174
2175 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2176 if (!osb->vol_label) {
2177 mlog(ML_ERROR, "unable to alloc vol label\n");
2178 status = -ENOMEM;
2179 goto bail;
2180 }
2181
2182 osb->slot_recovery_generations =
2183 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2184 GFP_KERNEL);
2185 if (!osb->slot_recovery_generations) {
2186 status = -ENOMEM;
2187 mlog_errno(status);
2188 goto bail;
2189 }
2190
2191 init_waitqueue_head(&osb->osb_wipe_event);
2192 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2193 sizeof(*osb->osb_orphan_wipes),
2194 GFP_KERNEL);
2195 if (!osb->osb_orphan_wipes) {
2196 status = -ENOMEM;
2197 mlog_errno(status);
2198 goto bail;
2199 }
2200
2201 osb->osb_rf_lock_tree = RB_ROOT;
2202
2203 osb->s_feature_compat =
2204 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2205 osb->s_feature_ro_compat =
2206 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2207 osb->s_feature_incompat =
2208 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2209
2210 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2211 mlog(ML_ERROR, "couldn't mount because of unsupported "
2212 "optional features (%x).\n", i);
2213 status = -EINVAL;
2214 goto bail;
2215 }
2216 if (!(osb->sb->s_flags & MS_RDONLY) &&
2217 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2218 mlog(ML_ERROR, "couldn't mount RDWR because of "
2219 "unsupported optional features (%x).\n", i);
2220 status = -EINVAL;
2221 goto bail;
2222 }
2223
2224 if (ocfs2_clusterinfo_valid(osb)) {
2225 osb->osb_stackflags =
2226 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2227 memcpy(osb->osb_cluster_stack,
2228 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2229 OCFS2_STACK_LABEL_LEN);
2230 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2231 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2232 mlog(ML_ERROR,
2233 "couldn't mount because of an invalid "
2234 "cluster stack label (%s) \n",
2235 osb->osb_cluster_stack);
2236 status = -EINVAL;
2237 goto bail;
2238 }
2239 } else {
2240 /* The empty string is identical with classic tools that
2241 * don't know about s_cluster_info. */
2242 osb->osb_cluster_stack[0] = '\0';
2243 }
2244
2245 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2246
2247 /* FIXME
2248 * This should be done in ocfs2_journal_init(), but unknown
2249 * ordering issues will cause the filesystem to crash.
2250 * If anyone wants to figure out what part of the code
2251 * refers to osb->journal before ocfs2_journal_init() is run,
2252 * be my guest.
2253 */
2254 /* initialize our journal structure */
2255
2256 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2257 if (!journal) {
2258 mlog(ML_ERROR, "unable to alloc journal\n");
2259 status = -ENOMEM;
2260 goto bail;
2261 }
2262 osb->journal = journal;
2263 journal->j_osb = osb;
2264
2265 atomic_set(&journal->j_num_trans, 0);
2266 init_rwsem(&journal->j_trans_barrier);
2267 init_waitqueue_head(&journal->j_checkpointed);
2268 spin_lock_init(&journal->j_lock);
2269 journal->j_trans_id = (unsigned long) 1;
2270 INIT_LIST_HEAD(&journal->j_la_cleanups);
2271 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2272 journal->j_state = OCFS2_JOURNAL_FREE;
2273
2274 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2275 osb->dentry_lock_list = NULL;
2276
2277 /* get some pseudo constants for clustersize bits */
2278 osb->s_clustersize_bits =
2279 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2280 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2281
2282 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2283 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2284 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2285 osb->s_clustersize);
2286 status = -EINVAL;
2287 goto bail;
2288 }
2289
2290 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2291 le32_to_cpu(di->i_clusters));
2292
2293 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2294 total_blocks);
2295 if (status) {
2296 mlog(ML_ERROR, "Volume too large "
2297 "to mount safely on this system");
2298 status = -EFBIG;
2299 goto bail;
2300 }
2301
2302 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2303 sizeof(di->id2.i_super.s_uuid))) {
2304 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2305 status = -ENOMEM;
2306 goto bail;
2307 }
2308
2309 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2310
2311 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2312 osb->vol_label[63] = '\0';
2313 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2314 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2315 osb->first_cluster_group_blkno =
2316 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2317 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2318 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2319 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2320 (unsigned long long)osb->root_blkno,
2321 (unsigned long long)osb->system_dir_blkno,
2322 osb->s_clustersize_bits);
2323
2324 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2325 if (!osb->osb_dlm_debug) {
2326 status = -ENOMEM;
2327 mlog_errno(status);
2328 goto bail;
2329 }
2330
2331 atomic_set(&osb->vol_state, VOLUME_INIT);
2332
2333 /* load root, system_dir, and all global system inodes */
2334 status = ocfs2_init_global_system_inodes(osb);
2335 if (status < 0) {
2336 mlog_errno(status);
2337 goto bail;
2338 }
2339
2340 /*
2341 * global bitmap
2342 */
2343 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2344 OCFS2_INVALID_SLOT);
2345 if (!inode) {
2346 status = -EINVAL;
2347 mlog_errno(status);
2348 goto bail;
2349 }
2350
2351 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2352 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2353 iput(inode);
2354
2355 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2356 osb->s_feature_incompat) * 8;
2357
2358 status = ocfs2_init_slot_info(osb);
2359 if (status < 0) {
2360 mlog_errno(status);
2361 goto bail;
2362 }
2363 cleancache_init_shared_fs((char *)&uuid_net_key, sb);
2364
2365 bail:
2366 return status;
2367 }
2368
2369 /*
2370 * will return: -EAGAIN if it is ok to keep searching for superblocks
2371 * -EINVAL if there is a bad superblock
2372 * 0 on success
2373 */
2374 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2375 struct buffer_head *bh,
2376 u32 blksz,
2377 struct ocfs2_blockcheck_stats *stats)
2378 {
2379 int status = -EAGAIN;
2380
2381 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2382 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2383 /* We have to do a raw check of the feature here */
2384 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2385 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2386 status = ocfs2_block_check_validate(bh->b_data,
2387 bh->b_size,
2388 &di->i_check,
2389 stats);
2390 if (status)
2391 goto out;
2392 }
2393 status = -EINVAL;
2394 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2395 mlog(ML_ERROR, "found superblock with incorrect block "
2396 "size: found %u, should be %u\n",
2397 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2398 blksz);
2399 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2400 OCFS2_MAJOR_REV_LEVEL ||
2401 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2402 OCFS2_MINOR_REV_LEVEL) {
2403 mlog(ML_ERROR, "found superblock with bad version: "
2404 "found %u.%u, should be %u.%u\n",
2405 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2406 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2407 OCFS2_MAJOR_REV_LEVEL,
2408 OCFS2_MINOR_REV_LEVEL);
2409 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2410 mlog(ML_ERROR, "bad block number on superblock: "
2411 "found %llu, should be %llu\n",
2412 (unsigned long long)le64_to_cpu(di->i_blkno),
2413 (unsigned long long)bh->b_blocknr);
2414 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2415 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2416 mlog(ML_ERROR, "bad cluster size found: %u\n",
2417 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2418 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2419 mlog(ML_ERROR, "bad root_blkno: 0\n");
2420 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2421 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2422 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2423 mlog(ML_ERROR,
2424 "Superblock slots found greater than file system "
2425 "maximum: found %u, max %u\n",
2426 le16_to_cpu(di->id2.i_super.s_max_slots),
2427 OCFS2_MAX_SLOTS);
2428 } else {
2429 /* found it! */
2430 status = 0;
2431 }
2432 }
2433
2434 out:
2435 if (status && status != -EAGAIN)
2436 mlog_errno(status);
2437 return status;
2438 }
2439
2440 static int ocfs2_check_volume(struct ocfs2_super *osb)
2441 {
2442 int status;
2443 int dirty;
2444 int local;
2445 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2446 * recover
2447 * ourselves. */
2448
2449 /* Init our journal object. */
2450 status = ocfs2_journal_init(osb->journal, &dirty);
2451 if (status < 0) {
2452 mlog(ML_ERROR, "Could not initialize journal!\n");
2453 goto finally;
2454 }
2455
2456 /* Now that journal has been initialized, check to make sure
2457 entire volume is addressable. */
2458 status = ocfs2_journal_addressable(osb);
2459 if (status)
2460 goto finally;
2461
2462 /* If the journal was unmounted cleanly then we don't want to
2463 * recover anything. Otherwise, journal_load will do that
2464 * dirty work for us :) */
2465 if (!dirty) {
2466 status = ocfs2_journal_wipe(osb->journal, 0);
2467 if (status < 0) {
2468 mlog_errno(status);
2469 goto finally;
2470 }
2471 } else {
2472 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2473 "unmounted cleanly, recovering it.\n", osb->dev_str);
2474 }
2475
2476 local = ocfs2_mount_local(osb);
2477
2478 /* will play back anything left in the journal. */
2479 status = ocfs2_journal_load(osb->journal, local, dirty);
2480 if (status < 0) {
2481 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2482 goto finally;
2483 }
2484
2485 if (dirty) {
2486 /* recover my local alloc if we didn't unmount cleanly. */
2487 status = ocfs2_begin_local_alloc_recovery(osb,
2488 osb->slot_num,
2489 &local_alloc);
2490 if (status < 0) {
2491 mlog_errno(status);
2492 goto finally;
2493 }
2494 /* we complete the recovery process after we've marked
2495 * ourselves as mounted. */
2496 }
2497
2498 status = ocfs2_load_local_alloc(osb);
2499 if (status < 0) {
2500 mlog_errno(status);
2501 goto finally;
2502 }
2503
2504 if (dirty) {
2505 /* Recovery will be completed after we've mounted the
2506 * rest of the volume. */
2507 osb->dirty = 1;
2508 osb->local_alloc_copy = local_alloc;
2509 local_alloc = NULL;
2510 }
2511
2512 /* go through each journal, trylock it and if you get the
2513 * lock, and it's marked as dirty, set the bit in the recover
2514 * map and launch a recovery thread for it. */
2515 status = ocfs2_mark_dead_nodes(osb);
2516 if (status < 0) {
2517 mlog_errno(status);
2518 goto finally;
2519 }
2520
2521 status = ocfs2_compute_replay_slots(osb);
2522 if (status < 0)
2523 mlog_errno(status);
2524
2525 finally:
2526 if (local_alloc)
2527 kfree(local_alloc);
2528
2529 if (status)
2530 mlog_errno(status);
2531 return status;
2532 }
2533
2534 /*
2535 * The routine gets called from dismount or close whenever a dismount on
2536 * volume is requested and the osb open count becomes 1.
2537 * It will remove the osb from the global list and also free up all the
2538 * initialized resources and fileobject.
2539 */
2540 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2541 {
2542 /* This function assumes that the caller has the main osb resource */
2543
2544 ocfs2_free_slot_info(osb);
2545
2546 kfree(osb->osb_orphan_wipes);
2547 kfree(osb->slot_recovery_generations);
2548 /* FIXME
2549 * This belongs in journal shutdown, but because we have to
2550 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2551 * we free it here.
2552 */
2553 kfree(osb->journal);
2554 if (osb->local_alloc_copy)
2555 kfree(osb->local_alloc_copy);
2556 kfree(osb->uuid_str);
2557 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2558 memset(osb, 0, sizeof(struct ocfs2_super));
2559 }
2560
2561 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2562 * panic(). We do not support continue-on-error operation. */
2563 static void ocfs2_handle_error(struct super_block *sb)
2564 {
2565 struct ocfs2_super *osb = OCFS2_SB(sb);
2566
2567 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2568 panic("OCFS2: (device %s): panic forced after error\n",
2569 sb->s_id);
2570
2571 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2572
2573 if (sb->s_flags & MS_RDONLY &&
2574 (ocfs2_is_soft_readonly(osb) ||
2575 ocfs2_is_hard_readonly(osb)))
2576 return;
2577
2578 printk(KERN_CRIT "File system is now read-only due to the potential "
2579 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2580 "system is unmounted.\n");
2581 sb->s_flags |= MS_RDONLY;
2582 ocfs2_set_ro_flag(osb, 0);
2583 }
2584
2585 static char error_buf[1024];
2586
2587 void __ocfs2_error(struct super_block *sb,
2588 const char *function,
2589 const char *fmt, ...)
2590 {
2591 va_list args;
2592
2593 va_start(args, fmt);
2594 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2595 va_end(args);
2596
2597 /* Not using mlog here because we want to show the actual
2598 * function the error came from. */
2599 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2600 sb->s_id, function, error_buf);
2601
2602 ocfs2_handle_error(sb);
2603 }
2604
2605 /* Handle critical errors. This is intentionally more drastic than
2606 * ocfs2_handle_error, so we only use for things like journal errors,
2607 * etc. */
2608 void __ocfs2_abort(struct super_block* sb,
2609 const char *function,
2610 const char *fmt, ...)
2611 {
2612 va_list args;
2613
2614 va_start(args, fmt);
2615 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2616 va_end(args);
2617
2618 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2619 sb->s_id, function, error_buf);
2620
2621 /* We don't have the cluster support yet to go straight to
2622 * hard readonly in here. Until then, we want to keep
2623 * ocfs2_abort() so that we can at least mark critical
2624 * errors.
2625 *
2626 * TODO: This should abort the journal and alert other nodes
2627 * that our slot needs recovery. */
2628
2629 /* Force a panic(). This stinks, but it's better than letting
2630 * things continue without having a proper hard readonly
2631 * here. */
2632 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2633 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2634 ocfs2_handle_error(sb);
2635 }
2636
2637 /*
2638 * Void signal blockers, because in-kernel sigprocmask() only fails
2639 * when SIG_* is wrong.
2640 */
2641 void ocfs2_block_signals(sigset_t *oldset)
2642 {
2643 int rc;
2644 sigset_t blocked;
2645
2646 sigfillset(&blocked);
2647 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2648 BUG_ON(rc);
2649 }
2650
2651 void ocfs2_unblock_signals(sigset_t *oldset)
2652 {
2653 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2654 BUG_ON(rc);
2655 }
2656
2657 module_init(ocfs2_init);
2658 module_exit(ocfs2_exit);
linux-next