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iwlagn: add a get_irq method to iwl_bus_ops and use it
[linux/fpc-iii.git] / fs / ocfs2 / super.c
blob5a521c748859945c76299e93fe01127c76408d8f
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 CREATE_TRACE_POINTS
46 #include "ocfs2_trace.h"
47
48 #include <cluster/masklog.h>
49
50 #include "ocfs2.h"
51
52 /* this should be the only file to include a version 1 header */
53 #include "ocfs1_fs_compat.h"
54
55 #include "alloc.h"
56 #include "blockcheck.h"
57 #include "dlmglue.h"
58 #include "export.h"
59 #include "extent_map.h"
60 #include "heartbeat.h"
61 #include "inode.h"
62 #include "journal.h"
63 #include "localalloc.h"
64 #include "namei.h"
65 #include "slot_map.h"
66 #include "super.h"
67 #include "sysfile.h"
68 #include "uptodate.h"
69 #include "ver.h"
70 #include "xattr.h"
71 #include "quota.h"
72 #include "refcounttree.h"
73 #include "suballoc.h"
74
75 #include "buffer_head_io.h"
76
77 static struct kmem_cache *ocfs2_inode_cachep = NULL;
78 struct kmem_cache *ocfs2_dquot_cachep;
79 struct kmem_cache *ocfs2_qf_chunk_cachep;
80
81 /* OCFS2 needs to schedule several different types of work which
82 * require cluster locking, disk I/O, recovery waits, etc. Since these
83 * types of work tend to be heavy we avoid using the kernel events
84 * workqueue and schedule on our own. */
85 struct workqueue_struct *ocfs2_wq = NULL;
86
87 static struct dentry *ocfs2_debugfs_root = NULL;
88
89 MODULE_AUTHOR("Oracle");
90 MODULE_LICENSE("GPL");
91
92 struct mount_options
93 {
94 unsigned long commit_interval;
95 unsigned long mount_opt;
96 unsigned int atime_quantum;
97 signed short slot;
98 int localalloc_opt;
99 unsigned int resv_level;
100 int dir_resv_level;
101 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
102 };
103
104 static int ocfs2_parse_options(struct super_block *sb, char *options,
105 struct mount_options *mopt,
106 int is_remount);
107 static int ocfs2_check_set_options(struct super_block *sb,
108 struct mount_options *options);
109 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
110 static void ocfs2_put_super(struct super_block *sb);
111 static int ocfs2_mount_volume(struct super_block *sb);
112 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
113 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
114 static int ocfs2_initialize_mem_caches(void);
115 static void ocfs2_free_mem_caches(void);
116 static void ocfs2_delete_osb(struct ocfs2_super *osb);
117
118 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
119
120 static int ocfs2_sync_fs(struct super_block *sb, int wait);
121
122 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
123 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
124 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
125 static int ocfs2_check_volume(struct ocfs2_super *osb);
126 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
127 struct buffer_head *bh,
128 u32 sectsize,
129 struct ocfs2_blockcheck_stats *stats);
130 static int ocfs2_initialize_super(struct super_block *sb,
131 struct buffer_head *bh,
132 int sector_size,
133 struct ocfs2_blockcheck_stats *stats);
134 static int ocfs2_get_sector(struct super_block *sb,
135 struct buffer_head **bh,
136 int block,
137 int sect_size);
138 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
139 static void ocfs2_destroy_inode(struct inode *inode);
140 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
141 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
142 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
143
144 static const struct super_operations ocfs2_sops = {
145 .statfs = ocfs2_statfs,
146 .alloc_inode = ocfs2_alloc_inode,
147 .destroy_inode = ocfs2_destroy_inode,
148 .drop_inode = ocfs2_drop_inode,
149 .evict_inode = ocfs2_evict_inode,
150 .sync_fs = ocfs2_sync_fs,
151 .put_super = ocfs2_put_super,
152 .remount_fs = ocfs2_remount,
153 .show_options = ocfs2_show_options,
154 .quota_read = ocfs2_quota_read,
155 .quota_write = ocfs2_quota_write,
156 };
157
158 enum {
159 Opt_barrier,
160 Opt_err_panic,
161 Opt_err_ro,
162 Opt_intr,
163 Opt_nointr,
164 Opt_hb_none,
165 Opt_hb_local,
166 Opt_hb_global,
167 Opt_data_ordered,
168 Opt_data_writeback,
169 Opt_atime_quantum,
170 Opt_slot,
171 Opt_commit,
172 Opt_localalloc,
173 Opt_localflocks,
174 Opt_stack,
175 Opt_user_xattr,
176 Opt_nouser_xattr,
177 Opt_inode64,
178 Opt_acl,
179 Opt_noacl,
180 Opt_usrquota,
181 Opt_grpquota,
182 Opt_coherency_buffered,
183 Opt_coherency_full,
184 Opt_resv_level,
185 Opt_dir_resv_level,
186 Opt_err,
187 };
188
189 static const match_table_t tokens = {
190 {Opt_barrier, "barrier=%u"},
191 {Opt_err_panic, "errors=panic"},
192 {Opt_err_ro, "errors=remount-ro"},
193 {Opt_intr, "intr"},
194 {Opt_nointr, "nointr"},
195 {Opt_hb_none, OCFS2_HB_NONE},
196 {Opt_hb_local, OCFS2_HB_LOCAL},
197 {Opt_hb_global, OCFS2_HB_GLOBAL},
198 {Opt_data_ordered, "data=ordered"},
199 {Opt_data_writeback, "data=writeback"},
200 {Opt_atime_quantum, "atime_quantum=%u"},
201 {Opt_slot, "preferred_slot=%u"},
202 {Opt_commit, "commit=%u"},
203 {Opt_localalloc, "localalloc=%d"},
204 {Opt_localflocks, "localflocks"},
205 {Opt_stack, "cluster_stack=%s"},
206 {Opt_user_xattr, "user_xattr"},
207 {Opt_nouser_xattr, "nouser_xattr"},
208 {Opt_inode64, "inode64"},
209 {Opt_acl, "acl"},
210 {Opt_noacl, "noacl"},
211 {Opt_usrquota, "usrquota"},
212 {Opt_grpquota, "grpquota"},
213 {Opt_coherency_buffered, "coherency=buffered"},
214 {Opt_coherency_full, "coherency=full"},
215 {Opt_resv_level, "resv_level=%u"},
216 {Opt_dir_resv_level, "dir_resv_level=%u"},
217 {Opt_err, NULL}
218 };
219
220 #ifdef CONFIG_DEBUG_FS
221 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
222 {
223 struct ocfs2_cluster_connection *cconn = osb->cconn;
224 struct ocfs2_recovery_map *rm = osb->recovery_map;
225 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
226 int i, out = 0;
227
228 out += snprintf(buf + out, len - out,
229 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
230 "Device", osb->dev_str, osb->uuid_str,
231 osb->fs_generation, osb->vol_label);
232
233 out += snprintf(buf + out, len - out,
234 "%10s => State: %d Flags: 0x%lX\n", "Volume",
235 atomic_read(&osb->vol_state), osb->osb_flags);
236
237 out += snprintf(buf + out, len - out,
238 "%10s => Block: %lu Cluster: %d\n", "Sizes",
239 osb->sb->s_blocksize, osb->s_clustersize);
240
241 out += snprintf(buf + out, len - out,
242 "%10s => Compat: 0x%X Incompat: 0x%X "
243 "ROcompat: 0x%X\n",
244 "Features", osb->s_feature_compat,
245 osb->s_feature_incompat, osb->s_feature_ro_compat);
246
247 out += snprintf(buf + out, len - out,
248 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
249 osb->s_mount_opt, osb->s_atime_quantum);
250
251 if (cconn) {
252 out += snprintf(buf + out, len - out,
253 "%10s => Stack: %s Name: %*s "
254 "Version: %d.%d\n", "Cluster",
255 (*osb->osb_cluster_stack == '\0' ?
256 "o2cb" : osb->osb_cluster_stack),
257 cconn->cc_namelen, cconn->cc_name,
258 cconn->cc_version.pv_major,
259 cconn->cc_version.pv_minor);
260 }
261
262 spin_lock(&osb->dc_task_lock);
263 out += snprintf(buf + out, len - out,
264 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
265 "WorkSeq: %lu\n", "DownCnvt",
266 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
267 osb->blocked_lock_count, osb->dc_wake_sequence,
268 osb->dc_work_sequence);
269 spin_unlock(&osb->dc_task_lock);
270
271 spin_lock(&osb->osb_lock);
272 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
273 "Recovery",
274 (osb->recovery_thread_task ?
275 task_pid_nr(osb->recovery_thread_task) : -1));
276 if (rm->rm_used == 0)
277 out += snprintf(buf + out, len - out, " None\n");
278 else {
279 for (i = 0; i < rm->rm_used; i++)
280 out += snprintf(buf + out, len - out, " %d",
281 rm->rm_entries[i]);
282 out += snprintf(buf + out, len - out, "\n");
283 }
284 spin_unlock(&osb->osb_lock);
285
286 out += snprintf(buf + out, len - out,
287 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
288 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
289 osb->osb_commit_interval,
290 atomic_read(&osb->needs_checkpoint));
291
292 out += snprintf(buf + out, len - out,
293 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
294 "Journal", osb->journal->j_state,
295 osb->journal->j_trans_id,
296 atomic_read(&osb->journal->j_num_trans));
297
298 out += snprintf(buf + out, len - out,
299 "%10s => GlobalAllocs: %d LocalAllocs: %d "
300 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
301 "Stats",
302 atomic_read(&osb->alloc_stats.bitmap_data),
303 atomic_read(&osb->alloc_stats.local_data),
304 atomic_read(&osb->alloc_stats.bg_allocs),
305 atomic_read(&osb->alloc_stats.moves),
306 atomic_read(&osb->alloc_stats.bg_extends));
307
308 out += snprintf(buf + out, len - out,
309 "%10s => State: %u Descriptor: %llu Size: %u bits "
310 "Default: %u bits\n",
311 "LocalAlloc", osb->local_alloc_state,
312 (unsigned long long)osb->la_last_gd,
313 osb->local_alloc_bits, osb->local_alloc_default_bits);
314
315 spin_lock(&osb->osb_lock);
316 out += snprintf(buf + out, len - out,
317 "%10s => InodeSlot: %d StolenInodes: %d, "
318 "MetaSlot: %d StolenMeta: %d\n", "Steal",
319 osb->s_inode_steal_slot,
320 atomic_read(&osb->s_num_inodes_stolen),
321 osb->s_meta_steal_slot,
322 atomic_read(&osb->s_num_meta_stolen));
323 spin_unlock(&osb->osb_lock);
324
325 out += snprintf(buf + out, len - out, "OrphanScan => ");
326 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
327 os->os_count, os->os_seqno);
328 out += snprintf(buf + out, len - out, " Last Scan: ");
329 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
330 out += snprintf(buf + out, len - out, "Disabled\n");
331 else
332 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
333 (get_seconds() - os->os_scantime.tv_sec));
334
335 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
336 "Slots", "Num", "RecoGen");
337 for (i = 0; i < osb->max_slots; ++i) {
338 out += snprintf(buf + out, len - out,
339 "%10s %c %3d %10d\n",
340 " ",
341 (i == osb->slot_num ? '*' : ' '),
342 i, osb->slot_recovery_generations[i]);
343 }
344
345 return out;
346 }
347
348 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
349 {
350 struct ocfs2_super *osb = inode->i_private;
351 char *buf = NULL;
352
353 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
354 if (!buf)
355 goto bail;
356
357 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
358
359 file->private_data = buf;
360
361 return 0;
362 bail:
363 return -ENOMEM;
364 }
365
366 static int ocfs2_debug_release(struct inode *inode, struct file *file)
367 {
368 kfree(file->private_data);
369 return 0;
370 }
371
372 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
373 size_t nbytes, loff_t *ppos)
374 {
375 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
376 i_size_read(file->f_mapping->host));
377 }
378 #else
379 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
380 {
381 return 0;
382 }
383 static int ocfs2_debug_release(struct inode *inode, struct file *file)
384 {
385 return 0;
386 }
387 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
388 size_t nbytes, loff_t *ppos)
389 {
390 return 0;
391 }
392 #endif /* CONFIG_DEBUG_FS */
393
394 static const struct file_operations ocfs2_osb_debug_fops = {
395 .open = ocfs2_osb_debug_open,
396 .release = ocfs2_debug_release,
397 .read = ocfs2_debug_read,
398 .llseek = generic_file_llseek,
399 };
400
401 static int ocfs2_sync_fs(struct super_block *sb, int wait)
402 {
403 int status;
404 tid_t target;
405 struct ocfs2_super *osb = OCFS2_SB(sb);
406
407 if (ocfs2_is_hard_readonly(osb))
408 return -EROFS;
409
410 if (wait) {
411 status = ocfs2_flush_truncate_log(osb);
412 if (status < 0)
413 mlog_errno(status);
414 } else {
415 ocfs2_schedule_truncate_log_flush(osb, 0);
416 }
417
418 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
419 &target)) {
420 if (wait)
421 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
422 target);
423 }
424 return 0;
425 }
426
427 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
428 {
429 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
430 && (ino == USER_QUOTA_SYSTEM_INODE
431 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
432 return 0;
433 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
434 && (ino == GROUP_QUOTA_SYSTEM_INODE
435 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
436 return 0;
437 return 1;
438 }
439
440 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
441 {
442 struct inode *new = NULL;
443 int status = 0;
444 int i;
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 if (status)
482 mlog_errno(status);
483 return status;
484 }
485
486 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
487 {
488 struct inode *new = NULL;
489 int status = 0;
490 int i;
491
492 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
493 i < NUM_SYSTEM_INODES;
494 i++) {
495 if (!ocfs2_need_system_inode(osb, i))
496 continue;
497 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
498 if (!new) {
499 ocfs2_release_system_inodes(osb);
500 status = -EINVAL;
501 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
502 status, i, osb->slot_num);
503 goto bail;
504 }
505 /* the array now has one ref, so drop this one */
506 iput(new);
507 }
508
509 bail:
510 if (status)
511 mlog_errno(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 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
521 inode = osb->global_system_inodes[i];
522 if (inode) {
523 iput(inode);
524 osb->global_system_inodes[i] = NULL;
525 }
526 }
527
528 inode = osb->sys_root_inode;
529 if (inode) {
530 iput(inode);
531 osb->sys_root_inode = NULL;
532 }
533
534 inode = osb->root_inode;
535 if (inode) {
536 iput(inode);
537 osb->root_inode = NULL;
538 }
539
540 if (!osb->local_system_inodes)
541 return;
542
543 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
544 if (osb->local_system_inodes[i]) {
545 iput(osb->local_system_inodes[i]);
546 osb->local_system_inodes[i] = NULL;
547 }
548 }
549
550 kfree(osb->local_system_inodes);
551 osb->local_system_inodes = NULL;
552 }
553
554 /* We're allocating fs objects, use GFP_NOFS */
555 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
556 {
557 struct ocfs2_inode_info *oi;
558
559 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
560 if (!oi)
561 return NULL;
562
563 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
564 return &oi->vfs_inode;
565 }
566
567 static void ocfs2_i_callback(struct rcu_head *head)
568 {
569 struct inode *inode = container_of(head, struct inode, i_rcu);
570 INIT_LIST_HEAD(&inode->i_dentry);
571 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
572 }
573
574 static void ocfs2_destroy_inode(struct inode *inode)
575 {
576 call_rcu(&inode->i_rcu, ocfs2_i_callback);
577 }
578
579 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
580 unsigned int cbits)
581 {
582 unsigned int bytes = 1 << cbits;
583 unsigned int trim = bytes;
584 unsigned int bitshift = 32;
585
586 /*
587 * i_size and all block offsets in ocfs2 are always 64 bits
588 * wide. i_clusters is 32 bits, in cluster-sized units. So on
589 * 64 bit platforms, cluster size will be the limiting factor.
590 */
591
592 #if BITS_PER_LONG == 32
593 # if defined(CONFIG_LBDAF)
594 BUILD_BUG_ON(sizeof(sector_t) != 8);
595 /*
596 * We might be limited by page cache size.
597 */
598 if (bytes > PAGE_CACHE_SIZE) {
599 bytes = PAGE_CACHE_SIZE;
600 trim = 1;
601 /*
602 * Shift by 31 here so that we don't get larger than
603 * MAX_LFS_FILESIZE
604 */
605 bitshift = 31;
606 }
607 # else
608 /*
609 * We are limited by the size of sector_t. Use block size, as
610 * that's what we expose to the VFS.
611 */
612 bytes = 1 << bbits;
613 trim = 1;
614 bitshift = 31;
615 # endif
616 #endif
617
618 /*
619 * Trim by a whole cluster when we can actually approach the
620 * on-disk limits. Otherwise we can overflow i_clusters when
621 * an extent start is at the max offset.
622 */
623 return (((unsigned long long)bytes) << bitshift) - trim;
624 }
625
626 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
627 {
628 int incompat_features;
629 int ret = 0;
630 struct mount_options parsed_options;
631 struct ocfs2_super *osb = OCFS2_SB(sb);
632 u32 tmp;
633
634 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
635 !ocfs2_check_set_options(sb, &parsed_options)) {
636 ret = -EINVAL;
637 goto out;
638 }
639
640 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
641 OCFS2_MOUNT_HB_NONE;
642 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
643 ret = -EINVAL;
644 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
645 goto out;
646 }
647
648 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
649 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
650 ret = -EINVAL;
651 mlog(ML_ERROR, "Cannot change data mode on remount\n");
652 goto out;
653 }
654
655 /* Probably don't want this on remount; it might
656 * mess with other nodes */
657 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
658 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
659 ret = -EINVAL;
660 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
661 goto out;
662 }
663
664 /* We're going to/from readonly mode. */
665 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
666 /* Disable quota accounting before remounting RO */
667 if (*flags & MS_RDONLY) {
668 ret = ocfs2_susp_quotas(osb, 0);
669 if (ret < 0)
670 goto out;
671 }
672 /* Lock here so the check of HARD_RO and the potential
673 * setting of SOFT_RO is atomic. */
674 spin_lock(&osb->osb_lock);
675 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
676 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
677 ret = -EROFS;
678 goto unlock_osb;
679 }
680
681 if (*flags & MS_RDONLY) {
682 sb->s_flags |= MS_RDONLY;
683 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
684 } else {
685 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
686 mlog(ML_ERROR, "Cannot remount RDWR "
687 "filesystem due to previous errors.\n");
688 ret = -EROFS;
689 goto unlock_osb;
690 }
691 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
692 if (incompat_features) {
693 mlog(ML_ERROR, "Cannot remount RDWR because "
694 "of unsupported optional features "
695 "(%x).\n", incompat_features);
696 ret = -EINVAL;
697 goto unlock_osb;
698 }
699 sb->s_flags &= ~MS_RDONLY;
700 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
701 }
702 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
703 unlock_osb:
704 spin_unlock(&osb->osb_lock);
705 /* Enable quota accounting after remounting RW */
706 if (!ret && !(*flags & MS_RDONLY)) {
707 if (sb_any_quota_suspended(sb))
708 ret = ocfs2_susp_quotas(osb, 1);
709 else
710 ret = ocfs2_enable_quotas(osb);
711 if (ret < 0) {
712 /* Return back changes... */
713 spin_lock(&osb->osb_lock);
714 sb->s_flags |= MS_RDONLY;
715 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
716 spin_unlock(&osb->osb_lock);
717 goto out;
718 }
719 }
720 }
721
722 if (!ret) {
723 /* Only save off the new mount options in case of a successful
724 * remount. */
725 osb->s_mount_opt = parsed_options.mount_opt;
726 osb->s_atime_quantum = parsed_options.atime_quantum;
727 osb->preferred_slot = parsed_options.slot;
728 if (parsed_options.commit_interval)
729 osb->osb_commit_interval = parsed_options.commit_interval;
730
731 if (!ocfs2_is_hard_readonly(osb))
732 ocfs2_set_journal_params(osb);
733
734 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
735 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
736 MS_POSIXACL : 0);
737 }
738 out:
739 return ret;
740 }
741
742 static int ocfs2_sb_probe(struct super_block *sb,
743 struct buffer_head **bh,
744 int *sector_size,
745 struct ocfs2_blockcheck_stats *stats)
746 {
747 int status, tmpstat;
748 struct ocfs1_vol_disk_hdr *hdr;
749 struct ocfs2_dinode *di;
750 int blksize;
751
752 *bh = NULL;
753
754 /* may be > 512 */
755 *sector_size = bdev_logical_block_size(sb->s_bdev);
756 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
757 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
758 *sector_size, OCFS2_MAX_BLOCKSIZE);
759 status = -EINVAL;
760 goto bail;
761 }
762
763 /* Can this really happen? */
764 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
765 *sector_size = OCFS2_MIN_BLOCKSIZE;
766
767 /* check block zero for old format */
768 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
769 if (status < 0) {
770 mlog_errno(status);
771 goto bail;
772 }
773 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
774 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
775 mlog(ML_ERROR, "incompatible version: %u.%u\n",
776 hdr->major_version, hdr->minor_version);
777 status = -EINVAL;
778 }
779 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
780 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
781 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
782 hdr->signature);
783 status = -EINVAL;
784 }
785 brelse(*bh);
786 *bh = NULL;
787 if (status < 0) {
788 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
789 "upgraded before mounting with ocfs v2\n");
790 goto bail;
791 }
792
793 /*
794 * Now check at magic offset for 512, 1024, 2048, 4096
795 * blocksizes. 4096 is the maximum blocksize because it is
796 * the minimum clustersize.
797 */
798 status = -EINVAL;
799 for (blksize = *sector_size;
800 blksize <= OCFS2_MAX_BLOCKSIZE;
801 blksize <<= 1) {
802 tmpstat = ocfs2_get_sector(sb, bh,
803 OCFS2_SUPER_BLOCK_BLKNO,
804 blksize);
805 if (tmpstat < 0) {
806 status = tmpstat;
807 mlog_errno(status);
808 break;
809 }
810 di = (struct ocfs2_dinode *) (*bh)->b_data;
811 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
812 spin_lock_init(&stats->b_lock);
813 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
814 if (tmpstat < 0) {
815 brelse(*bh);
816 *bh = NULL;
817 }
818 if (tmpstat != -EAGAIN) {
819 status = tmpstat;
820 break;
821 }
822 }
823
824 bail:
825 return status;
826 }
827
828 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
829 {
830 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
831
832 if (osb->s_mount_opt & hb_enabled) {
833 if (ocfs2_mount_local(osb)) {
834 mlog(ML_ERROR, "Cannot heartbeat on a locally "
835 "mounted device.\n");
836 return -EINVAL;
837 }
838 if (ocfs2_userspace_stack(osb)) {
839 mlog(ML_ERROR, "Userspace stack expected, but "
840 "o2cb heartbeat arguments passed to mount\n");
841 return -EINVAL;
842 }
843 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
844 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
845 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
846 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
847 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
848 return -EINVAL;
849 }
850 }
851
852 if (!(osb->s_mount_opt & hb_enabled)) {
853 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
854 !ocfs2_userspace_stack(osb)) {
855 mlog(ML_ERROR, "Heartbeat has to be started to mount "
856 "a read-write clustered device.\n");
857 return -EINVAL;
858 }
859 }
860
861 return 0;
862 }
863
864 /*
865 * If we're using a userspace stack, mount should have passed
866 * a name that matches the disk. If not, mount should not
867 * have passed a stack.
868 */
869 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
870 struct mount_options *mopt)
871 {
872 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
873 mlog(ML_ERROR,
874 "cluster stack passed to mount, but this filesystem "
875 "does not support it\n");
876 return -EINVAL;
877 }
878
879 if (ocfs2_userspace_stack(osb) &&
880 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
881 OCFS2_STACK_LABEL_LEN)) {
882 mlog(ML_ERROR,
883 "cluster stack passed to mount (\"%s\") does not "
884 "match the filesystem (\"%s\")\n",
885 mopt->cluster_stack,
886 osb->osb_cluster_stack);
887 return -EINVAL;
888 }
889
890 return 0;
891 }
892
893 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
894 {
895 int type;
896 struct super_block *sb = osb->sb;
897 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
898 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
899 int status = 0;
900
901 for (type = 0; type < MAXQUOTAS; type++) {
902 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
903 continue;
904 if (unsuspend)
905 status = dquot_resume(sb, type);
906 else {
907 struct ocfs2_mem_dqinfo *oinfo;
908
909 /* Cancel periodic syncing before suspending */
910 oinfo = sb_dqinfo(sb, type)->dqi_priv;
911 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
912 status = dquot_suspend(sb, type);
913 }
914 if (status < 0)
915 break;
916 }
917 if (status < 0)
918 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
919 "remount (error = %d).\n", status);
920 return status;
921 }
922
923 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
924 {
925 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
926 struct super_block *sb = osb->sb;
927 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
928 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
929 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
930 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
931 int status;
932 int type;
933
934 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
935 for (type = 0; type < MAXQUOTAS; type++) {
936 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
937 continue;
938 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
939 osb->slot_num);
940 if (!inode[type]) {
941 status = -ENOENT;
942 goto out_quota_off;
943 }
944 status = dquot_enable(inode[type], type, QFMT_OCFS2,
945 DQUOT_USAGE_ENABLED);
946 if (status < 0)
947 goto out_quota_off;
948 }
949
950 for (type = 0; type < MAXQUOTAS; type++)
951 iput(inode[type]);
952 return 0;
953 out_quota_off:
954 ocfs2_disable_quotas(osb);
955 for (type = 0; type < MAXQUOTAS; type++)
956 iput(inode[type]);
957 mlog_errno(status);
958 return status;
959 }
960
961 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
962 {
963 int type;
964 struct inode *inode;
965 struct super_block *sb = osb->sb;
966 struct ocfs2_mem_dqinfo *oinfo;
967
968 /* We mostly ignore errors in this function because there's not much
969 * we can do when we see them */
970 for (type = 0; type < MAXQUOTAS; type++) {
971 if (!sb_has_quota_loaded(sb, type))
972 continue;
973 /* Cancel periodic syncing before we grab dqonoff_mutex */
974 oinfo = sb_dqinfo(sb, type)->dqi_priv;
975 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
976 inode = igrab(sb->s_dquot.files[type]);
977 /* Turn off quotas. This will remove all dquot structures from
978 * memory and so they will be automatically synced to global
979 * quota files */
980 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
981 DQUOT_LIMITS_ENABLED);
982 if (!inode)
983 continue;
984 iput(inode);
985 }
986 }
987
988 /* Handle quota on quotactl */
989 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
990 {
991 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
992 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
993
994 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
995 return -EINVAL;
996
997 return dquot_enable(sb_dqopt(sb)->files[type], type,
998 format_id, DQUOT_LIMITS_ENABLED);
999 }
1000
1001 /* Handle quota off quotactl */
1002 static int ocfs2_quota_off(struct super_block *sb, int type)
1003 {
1004 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1005 }
1006
1007 static const struct quotactl_ops ocfs2_quotactl_ops = {
1008 .quota_on_meta = ocfs2_quota_on,
1009 .quota_off = ocfs2_quota_off,
1010 .quota_sync = dquot_quota_sync,
1011 .get_info = dquot_get_dqinfo,
1012 .set_info = dquot_set_dqinfo,
1013 .get_dqblk = dquot_get_dqblk,
1014 .set_dqblk = dquot_set_dqblk,
1015 };
1016
1017 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1018 {
1019 struct dentry *root;
1020 int status, sector_size;
1021 struct mount_options parsed_options;
1022 struct inode *inode = NULL;
1023 struct ocfs2_super *osb = NULL;
1024 struct buffer_head *bh = NULL;
1025 char nodestr[8];
1026 struct ocfs2_blockcheck_stats stats;
1027
1028 trace_ocfs2_fill_super(sb, data, silent);
1029
1030 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1031 status = -EINVAL;
1032 goto read_super_error;
1033 }
1034
1035 /* probe for superblock */
1036 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1037 if (status < 0) {
1038 mlog(ML_ERROR, "superblock probe failed!\n");
1039 goto read_super_error;
1040 }
1041
1042 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1043 osb = OCFS2_SB(sb);
1044 if (status < 0) {
1045 mlog_errno(status);
1046 goto read_super_error;
1047 }
1048 brelse(bh);
1049 bh = NULL;
1050
1051 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1052 status = -EINVAL;
1053 goto read_super_error;
1054 }
1055 osb->s_mount_opt = parsed_options.mount_opt;
1056 osb->s_atime_quantum = parsed_options.atime_quantum;
1057 osb->preferred_slot = parsed_options.slot;
1058 osb->osb_commit_interval = parsed_options.commit_interval;
1059
1060 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1061 osb->osb_resv_level = parsed_options.resv_level;
1062 osb->osb_dir_resv_level = parsed_options.resv_level;
1063 if (parsed_options.dir_resv_level == -1)
1064 osb->osb_dir_resv_level = parsed_options.resv_level;
1065 else
1066 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1067
1068 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1069 if (status)
1070 goto read_super_error;
1071
1072 sb->s_magic = OCFS2_SUPER_MAGIC;
1073
1074 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1075 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1076
1077 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1078 * heartbeat=none */
1079 if (bdev_read_only(sb->s_bdev)) {
1080 if (!(sb->s_flags & MS_RDONLY)) {
1081 status = -EACCES;
1082 mlog(ML_ERROR, "Readonly device detected but readonly "
1083 "mount was not specified.\n");
1084 goto read_super_error;
1085 }
1086
1087 /* You should not be able to start a local heartbeat
1088 * on a readonly device. */
1089 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1090 status = -EROFS;
1091 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1092 "device.\n");
1093 goto read_super_error;
1094 }
1095
1096 status = ocfs2_check_journals_nolocks(osb);
1097 if (status < 0) {
1098 if (status == -EROFS)
1099 mlog(ML_ERROR, "Recovery required on readonly "
1100 "file system, but write access is "
1101 "unavailable.\n");
1102 else
1103 mlog_errno(status);
1104 goto read_super_error;
1105 }
1106
1107 ocfs2_set_ro_flag(osb, 1);
1108
1109 printk(KERN_NOTICE "Readonly device detected. No cluster "
1110 "services will be utilized for this mount. Recovery "
1111 "will be skipped.\n");
1112 }
1113
1114 if (!ocfs2_is_hard_readonly(osb)) {
1115 if (sb->s_flags & MS_RDONLY)
1116 ocfs2_set_ro_flag(osb, 0);
1117 }
1118
1119 status = ocfs2_verify_heartbeat(osb);
1120 if (status < 0) {
1121 mlog_errno(status);
1122 goto read_super_error;
1123 }
1124
1125 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1126 ocfs2_debugfs_root);
1127 if (!osb->osb_debug_root) {
1128 status = -EINVAL;
1129 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1130 goto read_super_error;
1131 }
1132
1133 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1134 osb->osb_debug_root,
1135 osb,
1136 &ocfs2_osb_debug_fops);
1137 if (!osb->osb_ctxt) {
1138 status = -EINVAL;
1139 mlog_errno(status);
1140 goto read_super_error;
1141 }
1142
1143 if (ocfs2_meta_ecc(osb)) {
1144 status = ocfs2_blockcheck_stats_debugfs_install(
1145 &osb->osb_ecc_stats,
1146 osb->osb_debug_root);
1147 if (status) {
1148 mlog(ML_ERROR,
1149 "Unable to create blockcheck statistics "
1150 "files\n");
1151 goto read_super_error;
1152 }
1153 }
1154
1155 status = ocfs2_mount_volume(sb);
1156 if (osb->root_inode)
1157 inode = igrab(osb->root_inode);
1158
1159 if (status < 0)
1160 goto read_super_error;
1161
1162 if (!inode) {
1163 status = -EIO;
1164 mlog_errno(status);
1165 goto read_super_error;
1166 }
1167
1168 root = d_alloc_root(inode);
1169 if (!root) {
1170 status = -ENOMEM;
1171 mlog_errno(status);
1172 goto read_super_error;
1173 }
1174
1175 sb->s_root = root;
1176
1177 ocfs2_complete_mount_recovery(osb);
1178
1179 if (ocfs2_mount_local(osb))
1180 snprintf(nodestr, sizeof(nodestr), "local");
1181 else
1182 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1183
1184 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1185 "with %s data mode.\n",
1186 osb->dev_str, nodestr, osb->slot_num,
1187 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1188 "ordered");
1189
1190 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1191 wake_up(&osb->osb_mount_event);
1192
1193 /* Now we can initialize quotas because we can afford to wait
1194 * for cluster locks recovery now. That also means that truncation
1195 * log recovery can happen but that waits for proper quota setup */
1196 if (!(sb->s_flags & MS_RDONLY)) {
1197 status = ocfs2_enable_quotas(osb);
1198 if (status < 0) {
1199 /* We have to err-out specially here because
1200 * s_root is already set */
1201 mlog_errno(status);
1202 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1203 wake_up(&osb->osb_mount_event);
1204 return status;
1205 }
1206 }
1207
1208 ocfs2_complete_quota_recovery(osb);
1209
1210 /* Now we wake up again for processes waiting for quotas */
1211 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1212 wake_up(&osb->osb_mount_event);
1213
1214 /* Start this when the mount is almost sure of being successful */
1215 ocfs2_orphan_scan_start(osb);
1216
1217 return status;
1218
1219 read_super_error:
1220 brelse(bh);
1221
1222 if (inode)
1223 iput(inode);
1224
1225 if (osb) {
1226 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1227 wake_up(&osb->osb_mount_event);
1228 ocfs2_dismount_volume(sb, 1);
1229 }
1230
1231 if (status)
1232 mlog_errno(status);
1233 return status;
1234 }
1235
1236 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1237 int flags,
1238 const char *dev_name,
1239 void *data)
1240 {
1241 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1242 }
1243
1244 static void ocfs2_kill_sb(struct super_block *sb)
1245 {
1246 struct ocfs2_super *osb = OCFS2_SB(sb);
1247
1248 /* Failed mount? */
1249 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1250 goto out;
1251
1252 /* Prevent further queueing of inode drop events */
1253 spin_lock(&dentry_list_lock);
1254 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1255 spin_unlock(&dentry_list_lock);
1256 /* Wait for work to finish and/or remove it */
1257 cancel_work_sync(&osb->dentry_lock_work);
1258 out:
1259 kill_block_super(sb);
1260 }
1261
1262 static struct file_system_type ocfs2_fs_type = {
1263 .owner = THIS_MODULE,
1264 .name = "ocfs2",
1265 .mount = ocfs2_mount,
1266 .kill_sb = ocfs2_kill_sb,
1267
1268 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1269 .next = NULL
1270 };
1271
1272 static int ocfs2_check_set_options(struct super_block *sb,
1273 struct mount_options *options)
1274 {
1275 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1276 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1277 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1278 mlog(ML_ERROR, "User quotas were requested, but this "
1279 "filesystem does not have the feature enabled.\n");
1280 return 0;
1281 }
1282 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1283 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1284 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1285 mlog(ML_ERROR, "Group quotas were requested, but this "
1286 "filesystem does not have the feature enabled.\n");
1287 return 0;
1288 }
1289 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1290 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1291 mlog(ML_ERROR, "ACL support requested but extended attributes "
1292 "feature is not enabled\n");
1293 return 0;
1294 }
1295 /* No ACL setting specified? Use XATTR feature... */
1296 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1297 OCFS2_MOUNT_NO_POSIX_ACL))) {
1298 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1299 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1300 else
1301 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1302 }
1303 return 1;
1304 }
1305
1306 static int ocfs2_parse_options(struct super_block *sb,
1307 char *options,
1308 struct mount_options *mopt,
1309 int is_remount)
1310 {
1311 int status, user_stack = 0;
1312 char *p;
1313 u32 tmp;
1314
1315 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1316
1317 mopt->commit_interval = 0;
1318 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1319 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1320 mopt->slot = OCFS2_INVALID_SLOT;
1321 mopt->localalloc_opt = -1;
1322 mopt->cluster_stack[0] = '\0';
1323 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1324 mopt->dir_resv_level = -1;
1325
1326 if (!options) {
1327 status = 1;
1328 goto bail;
1329 }
1330
1331 while ((p = strsep(&options, ",")) != NULL) {
1332 int token, option;
1333 substring_t args[MAX_OPT_ARGS];
1334
1335 if (!*p)
1336 continue;
1337
1338 token = match_token(p, tokens, args);
1339 switch (token) {
1340 case Opt_hb_local:
1341 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1342 break;
1343 case Opt_hb_none:
1344 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1345 break;
1346 case Opt_hb_global:
1347 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1348 break;
1349 case Opt_barrier:
1350 if (match_int(&args[0], &option)) {
1351 status = 0;
1352 goto bail;
1353 }
1354 if (option)
1355 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1356 else
1357 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1358 break;
1359 case Opt_intr:
1360 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1361 break;
1362 case Opt_nointr:
1363 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1364 break;
1365 case Opt_err_panic:
1366 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1367 break;
1368 case Opt_err_ro:
1369 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1370 break;
1371 case Opt_data_ordered:
1372 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1373 break;
1374 case Opt_data_writeback:
1375 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1376 break;
1377 case Opt_user_xattr:
1378 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1379 break;
1380 case Opt_nouser_xattr:
1381 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1382 break;
1383 case Opt_atime_quantum:
1384 if (match_int(&args[0], &option)) {
1385 status = 0;
1386 goto bail;
1387 }
1388 if (option >= 0)
1389 mopt->atime_quantum = option;
1390 break;
1391 case Opt_slot:
1392 option = 0;
1393 if (match_int(&args[0], &option)) {
1394 status = 0;
1395 goto bail;
1396 }
1397 if (option)
1398 mopt->slot = (s16)option;
1399 break;
1400 case Opt_commit:
1401 option = 0;
1402 if (match_int(&args[0], &option)) {
1403 status = 0;
1404 goto bail;
1405 }
1406 if (option < 0)
1407 return 0;
1408 if (option == 0)
1409 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1410 mopt->commit_interval = HZ * option;
1411 break;
1412 case Opt_localalloc:
1413 option = 0;
1414 if (match_int(&args[0], &option)) {
1415 status = 0;
1416 goto bail;
1417 }
1418 if (option >= 0)
1419 mopt->localalloc_opt = option;
1420 break;
1421 case Opt_localflocks:
1422 /*
1423 * Changing this during remount could race
1424 * flock() requests, or "unbalance" existing
1425 * ones (e.g., a lock is taken in one mode but
1426 * dropped in the other). If users care enough
1427 * to flip locking modes during remount, we
1428 * could add a "local" flag to individual
1429 * flock structures for proper tracking of
1430 * state.
1431 */
1432 if (!is_remount)
1433 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1434 break;
1435 case Opt_stack:
1436 /* Check both that the option we were passed
1437 * is of the right length and that it is a proper
1438 * string of the right length.
1439 */
1440 if (((args[0].to - args[0].from) !=
1441 OCFS2_STACK_LABEL_LEN) ||
1442 (strnlen(args[0].from,
1443 OCFS2_STACK_LABEL_LEN) !=
1444 OCFS2_STACK_LABEL_LEN)) {
1445 mlog(ML_ERROR,
1446 "Invalid cluster_stack option\n");
1447 status = 0;
1448 goto bail;
1449 }
1450 memcpy(mopt->cluster_stack, args[0].from,
1451 OCFS2_STACK_LABEL_LEN);
1452 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1453 /*
1454 * Open code the memcmp here as we don't have
1455 * an osb to pass to
1456 * ocfs2_userspace_stack().
1457 */
1458 if (memcmp(mopt->cluster_stack,
1459 OCFS2_CLASSIC_CLUSTER_STACK,
1460 OCFS2_STACK_LABEL_LEN))
1461 user_stack = 1;
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 if (user_stack == 0) {
1518 /* Ensure only one heartbeat mode */
1519 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1520 OCFS2_MOUNT_HB_GLOBAL |
1521 OCFS2_MOUNT_HB_NONE);
1522 if (hweight32(tmp) != 1) {
1523 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1524 status = 0;
1525 goto bail;
1526 }
1527 }
1528
1529 status = 1;
1530
1531 bail:
1532 return status;
1533 }
1534
1535 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1536 {
1537 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1538 unsigned long opts = osb->s_mount_opt;
1539 unsigned int local_alloc_megs;
1540
1541 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1542 seq_printf(s, ",_netdev");
1543 if (opts & OCFS2_MOUNT_HB_LOCAL)
1544 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1545 else
1546 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1547 } else
1548 seq_printf(s, ",%s", OCFS2_HB_NONE);
1549
1550 if (opts & OCFS2_MOUNT_NOINTR)
1551 seq_printf(s, ",nointr");
1552
1553 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1554 seq_printf(s, ",data=writeback");
1555 else
1556 seq_printf(s, ",data=ordered");
1557
1558 if (opts & OCFS2_MOUNT_BARRIER)
1559 seq_printf(s, ",barrier=1");
1560
1561 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1562 seq_printf(s, ",errors=panic");
1563 else
1564 seq_printf(s, ",errors=remount-ro");
1565
1566 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1567 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1568
1569 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1570 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1571
1572 if (osb->osb_commit_interval)
1573 seq_printf(s, ",commit=%u",
1574 (unsigned) (osb->osb_commit_interval / HZ));
1575
1576 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1577 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1578 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1579
1580 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1581 seq_printf(s, ",localflocks,");
1582
1583 if (osb->osb_cluster_stack[0])
1584 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1585 osb->osb_cluster_stack);
1586 if (opts & OCFS2_MOUNT_USRQUOTA)
1587 seq_printf(s, ",usrquota");
1588 if (opts & OCFS2_MOUNT_GRPQUOTA)
1589 seq_printf(s, ",grpquota");
1590
1591 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1592 seq_printf(s, ",coherency=buffered");
1593 else
1594 seq_printf(s, ",coherency=full");
1595
1596 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1597 seq_printf(s, ",nouser_xattr");
1598 else
1599 seq_printf(s, ",user_xattr");
1600
1601 if (opts & OCFS2_MOUNT_INODE64)
1602 seq_printf(s, ",inode64");
1603
1604 if (opts & OCFS2_MOUNT_POSIX_ACL)
1605 seq_printf(s, ",acl");
1606 else
1607 seq_printf(s, ",noacl");
1608
1609 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1610 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1611
1612 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1613 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1614
1615 return 0;
1616 }
1617
1618 static int __init ocfs2_init(void)
1619 {
1620 int status;
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 ocfs2_set_locking_protocol();
1649
1650 status = register_quota_format(&ocfs2_quota_format);
1651 leave:
1652 if (status < 0) {
1653 ocfs2_free_mem_caches();
1654 exit_ocfs2_uptodate_cache();
1655 mlog_errno(status);
1656 }
1657
1658 if (status >= 0) {
1659 return register_filesystem(&ocfs2_fs_type);
1660 } else
1661 return -1;
1662 }
1663
1664 static void __exit ocfs2_exit(void)
1665 {
1666 if (ocfs2_wq) {
1667 flush_workqueue(ocfs2_wq);
1668 destroy_workqueue(ocfs2_wq);
1669 }
1670
1671 unregister_quota_format(&ocfs2_quota_format);
1672
1673 debugfs_remove(ocfs2_debugfs_root);
1674
1675 ocfs2_free_mem_caches();
1676
1677 unregister_filesystem(&ocfs2_fs_type);
1678
1679 exit_ocfs2_uptodate_cache();
1680 }
1681
1682 static void ocfs2_put_super(struct super_block *sb)
1683 {
1684 trace_ocfs2_put_super(sb);
1685
1686 ocfs2_sync_blockdev(sb);
1687 ocfs2_dismount_volume(sb, 0);
1688 }
1689
1690 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1691 {
1692 struct ocfs2_super *osb;
1693 u32 numbits, freebits;
1694 int status;
1695 struct ocfs2_dinode *bm_lock;
1696 struct buffer_head *bh = NULL;
1697 struct inode *inode = NULL;
1698
1699 trace_ocfs2_statfs(dentry->d_sb, buf);
1700
1701 osb = OCFS2_SB(dentry->d_sb);
1702
1703 inode = ocfs2_get_system_file_inode(osb,
1704 GLOBAL_BITMAP_SYSTEM_INODE,
1705 OCFS2_INVALID_SLOT);
1706 if (!inode) {
1707 mlog(ML_ERROR, "failed to get bitmap inode\n");
1708 status = -EIO;
1709 goto bail;
1710 }
1711
1712 status = ocfs2_inode_lock(inode, &bh, 0);
1713 if (status < 0) {
1714 mlog_errno(status);
1715 goto bail;
1716 }
1717
1718 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1719
1720 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1721 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1722
1723 buf->f_type = OCFS2_SUPER_MAGIC;
1724 buf->f_bsize = dentry->d_sb->s_blocksize;
1725 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1726 buf->f_blocks = ((sector_t) numbits) *
1727 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1728 buf->f_bfree = ((sector_t) freebits) *
1729 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1730 buf->f_bavail = buf->f_bfree;
1731 buf->f_files = numbits;
1732 buf->f_ffree = freebits;
1733 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1734 & 0xFFFFFFFFUL;
1735 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1736 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1737
1738 brelse(bh);
1739
1740 ocfs2_inode_unlock(inode, 0);
1741 status = 0;
1742 bail:
1743 if (inode)
1744 iput(inode);
1745
1746 if (status)
1747 mlog_errno(status);
1748
1749 return status;
1750 }
1751
1752 static void ocfs2_inode_init_once(void *data)
1753 {
1754 struct ocfs2_inode_info *oi = data;
1755
1756 oi->ip_flags = 0;
1757 oi->ip_open_count = 0;
1758 spin_lock_init(&oi->ip_lock);
1759 ocfs2_extent_map_init(&oi->vfs_inode);
1760 INIT_LIST_HEAD(&oi->ip_io_markers);
1761 oi->ip_dir_start_lookup = 0;
1762
1763 init_rwsem(&oi->ip_alloc_sem);
1764 init_rwsem(&oi->ip_xattr_sem);
1765 mutex_init(&oi->ip_io_mutex);
1766
1767 oi->ip_blkno = 0ULL;
1768 oi->ip_clusters = 0;
1769
1770 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1771
1772 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1773 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1774 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1775
1776 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1777 &ocfs2_inode_caching_ops);
1778
1779 inode_init_once(&oi->vfs_inode);
1780 }
1781
1782 static int ocfs2_initialize_mem_caches(void)
1783 {
1784 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1785 sizeof(struct ocfs2_inode_info),
1786 0,
1787 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1788 SLAB_MEM_SPREAD),
1789 ocfs2_inode_init_once);
1790 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1791 sizeof(struct ocfs2_dquot),
1792 0,
1793 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1794 SLAB_MEM_SPREAD),
1795 NULL);
1796 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1797 sizeof(struct ocfs2_quota_chunk),
1798 0,
1799 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1800 NULL);
1801 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1802 !ocfs2_qf_chunk_cachep) {
1803 if (ocfs2_inode_cachep)
1804 kmem_cache_destroy(ocfs2_inode_cachep);
1805 if (ocfs2_dquot_cachep)
1806 kmem_cache_destroy(ocfs2_dquot_cachep);
1807 if (ocfs2_qf_chunk_cachep)
1808 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1809 return -ENOMEM;
1810 }
1811
1812 return 0;
1813 }
1814
1815 static void ocfs2_free_mem_caches(void)
1816 {
1817 if (ocfs2_inode_cachep)
1818 kmem_cache_destroy(ocfs2_inode_cachep);
1819 ocfs2_inode_cachep = NULL;
1820
1821 if (ocfs2_dquot_cachep)
1822 kmem_cache_destroy(ocfs2_dquot_cachep);
1823 ocfs2_dquot_cachep = NULL;
1824
1825 if (ocfs2_qf_chunk_cachep)
1826 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1827 ocfs2_qf_chunk_cachep = NULL;
1828 }
1829
1830 static int ocfs2_get_sector(struct super_block *sb,
1831 struct buffer_head **bh,
1832 int block,
1833 int sect_size)
1834 {
1835 if (!sb_set_blocksize(sb, sect_size)) {
1836 mlog(ML_ERROR, "unable to set blocksize\n");
1837 return -EIO;
1838 }
1839
1840 *bh = sb_getblk(sb, block);
1841 if (!*bh) {
1842 mlog_errno(-EIO);
1843 return -EIO;
1844 }
1845 lock_buffer(*bh);
1846 if (!buffer_dirty(*bh))
1847 clear_buffer_uptodate(*bh);
1848 unlock_buffer(*bh);
1849 ll_rw_block(READ, 1, bh);
1850 wait_on_buffer(*bh);
1851 if (!buffer_uptodate(*bh)) {
1852 mlog_errno(-EIO);
1853 brelse(*bh);
1854 *bh = NULL;
1855 return -EIO;
1856 }
1857
1858 return 0;
1859 }
1860
1861 static int ocfs2_mount_volume(struct super_block *sb)
1862 {
1863 int status = 0;
1864 int unlock_super = 0;
1865 struct ocfs2_super *osb = OCFS2_SB(sb);
1866
1867 if (ocfs2_is_hard_readonly(osb))
1868 goto leave;
1869
1870 status = ocfs2_dlm_init(osb);
1871 if (status < 0) {
1872 mlog_errno(status);
1873 goto leave;
1874 }
1875
1876 status = ocfs2_super_lock(osb, 1);
1877 if (status < 0) {
1878 mlog_errno(status);
1879 goto leave;
1880 }
1881 unlock_super = 1;
1882
1883 /* This will load up the node map and add ourselves to it. */
1884 status = ocfs2_find_slot(osb);
1885 if (status < 0) {
1886 mlog_errno(status);
1887 goto leave;
1888 }
1889
1890 /* load all node-local system inodes */
1891 status = ocfs2_init_local_system_inodes(osb);
1892 if (status < 0) {
1893 mlog_errno(status);
1894 goto leave;
1895 }
1896
1897 status = ocfs2_check_volume(osb);
1898 if (status < 0) {
1899 mlog_errno(status);
1900 goto leave;
1901 }
1902
1903 status = ocfs2_truncate_log_init(osb);
1904 if (status < 0)
1905 mlog_errno(status);
1906
1907 leave:
1908 if (unlock_super)
1909 ocfs2_super_unlock(osb, 1);
1910
1911 return status;
1912 }
1913
1914 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1915 {
1916 int tmp, hangup_needed = 0;
1917 struct ocfs2_super *osb = NULL;
1918 char nodestr[8];
1919
1920 trace_ocfs2_dismount_volume(sb);
1921
1922 BUG_ON(!sb);
1923 osb = OCFS2_SB(sb);
1924 BUG_ON(!osb);
1925
1926 debugfs_remove(osb->osb_ctxt);
1927
1928 /*
1929 * Flush inode dropping work queue so that deletes are
1930 * performed while the filesystem is still working
1931 */
1932 ocfs2_drop_all_dl_inodes(osb);
1933
1934 /* Orphan scan should be stopped as early as possible */
1935 ocfs2_orphan_scan_stop(osb);
1936
1937 ocfs2_disable_quotas(osb);
1938
1939 ocfs2_shutdown_local_alloc(osb);
1940
1941 ocfs2_truncate_log_shutdown(osb);
1942
1943 /* This will disable recovery and flush any recovery work. */
1944 ocfs2_recovery_exit(osb);
1945
1946 ocfs2_journal_shutdown(osb);
1947
1948 ocfs2_sync_blockdev(sb);
1949
1950 ocfs2_purge_refcount_trees(osb);
1951
1952 /* No cluster connection means we've failed during mount, so skip
1953 * all the steps which depended on that to complete. */
1954 if (osb->cconn) {
1955 tmp = ocfs2_super_lock(osb, 1);
1956 if (tmp < 0) {
1957 mlog_errno(tmp);
1958 return;
1959 }
1960 }
1961
1962 if (osb->slot_num != OCFS2_INVALID_SLOT)
1963 ocfs2_put_slot(osb);
1964
1965 if (osb->cconn)
1966 ocfs2_super_unlock(osb, 1);
1967
1968 ocfs2_release_system_inodes(osb);
1969
1970 /*
1971 * If we're dismounting due to mount error, mount.ocfs2 will clean
1972 * up heartbeat. If we're a local mount, there is no heartbeat.
1973 * If we failed before we got a uuid_str yet, we can't stop
1974 * heartbeat. Otherwise, do it.
1975 */
1976 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1977 hangup_needed = 1;
1978
1979 if (osb->cconn)
1980 ocfs2_dlm_shutdown(osb, hangup_needed);
1981
1982 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1983 debugfs_remove(osb->osb_debug_root);
1984
1985 if (hangup_needed)
1986 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1987
1988 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1989
1990 if (ocfs2_mount_local(osb))
1991 snprintf(nodestr, sizeof(nodestr), "local");
1992 else
1993 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1994
1995 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1996 osb->dev_str, nodestr);
1997
1998 ocfs2_delete_osb(osb);
1999 kfree(osb);
2000 sb->s_dev = 0;
2001 sb->s_fs_info = NULL;
2002 }
2003
2004 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2005 unsigned uuid_bytes)
2006 {
2007 int i, ret;
2008 char *ptr;
2009
2010 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2011
2012 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2013 if (osb->uuid_str == NULL)
2014 return -ENOMEM;
2015
2016 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2017 /* print with null */
2018 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2019 if (ret != 2) /* drop super cleans up */
2020 return -EINVAL;
2021 /* then only advance past the last char */
2022 ptr += 2;
2023 }
2024
2025 return 0;
2026 }
2027
2028 /* Make sure entire volume is addressable by our journal. Requires
2029 osb_clusters_at_boot to be valid and for the journal to have been
2030 initialized by ocfs2_journal_init(). */
2031 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2032 {
2033 int status = 0;
2034 u64 max_block =
2035 ocfs2_clusters_to_blocks(osb->sb,
2036 osb->osb_clusters_at_boot) - 1;
2037
2038 /* 32-bit block number is always OK. */
2039 if (max_block <= (u32)~0ULL)
2040 goto out;
2041
2042 /* Volume is "huge", so see if our journal is new enough to
2043 support it. */
2044 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2045 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2046 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2047 JBD2_FEATURE_INCOMPAT_64BIT))) {
2048 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2049 "Enable the 'block64' journal option with tunefs.ocfs2");
2050 status = -EFBIG;
2051 goto out;
2052 }
2053
2054 out:
2055 return status;
2056 }
2057
2058 static int ocfs2_initialize_super(struct super_block *sb,
2059 struct buffer_head *bh,
2060 int sector_size,
2061 struct ocfs2_blockcheck_stats *stats)
2062 {
2063 int status;
2064 int i, cbits, bbits;
2065 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2066 struct inode *inode = NULL;
2067 struct ocfs2_journal *journal;
2068 __le32 uuid_net_key;
2069 struct ocfs2_super *osb;
2070 u64 total_blocks;
2071
2072 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2073 if (!osb) {
2074 status = -ENOMEM;
2075 mlog_errno(status);
2076 goto bail;
2077 }
2078
2079 sb->s_fs_info = osb;
2080 sb->s_op = &ocfs2_sops;
2081 sb->s_d_op = &ocfs2_dentry_ops;
2082 sb->s_export_op = &ocfs2_export_ops;
2083 sb->s_qcop = &ocfs2_quotactl_ops;
2084 sb->dq_op = &ocfs2_quota_operations;
2085 sb->s_xattr = ocfs2_xattr_handlers;
2086 sb->s_time_gran = 1;
2087 sb->s_flags |= MS_NOATIME;
2088 /* this is needed to support O_LARGEFILE */
2089 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2090 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2091 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2092
2093 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2094
2095 for (i = 0; i < 3; i++)
2096 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2097 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2098
2099 osb->sb = sb;
2100 /* Save off for ocfs2_rw_direct */
2101 osb->s_sectsize_bits = blksize_bits(sector_size);
2102 BUG_ON(!osb->s_sectsize_bits);
2103
2104 spin_lock_init(&osb->dc_task_lock);
2105 init_waitqueue_head(&osb->dc_event);
2106 osb->dc_work_sequence = 0;
2107 osb->dc_wake_sequence = 0;
2108 INIT_LIST_HEAD(&osb->blocked_lock_list);
2109 osb->blocked_lock_count = 0;
2110 spin_lock_init(&osb->osb_lock);
2111 spin_lock_init(&osb->osb_xattr_lock);
2112 ocfs2_init_steal_slots(osb);
2113
2114 atomic_set(&osb->alloc_stats.moves, 0);
2115 atomic_set(&osb->alloc_stats.local_data, 0);
2116 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2117 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2118 atomic_set(&osb->alloc_stats.bg_extends, 0);
2119
2120 /* Copy the blockcheck stats from the superblock probe */
2121 osb->osb_ecc_stats = *stats;
2122
2123 ocfs2_init_node_maps(osb);
2124
2125 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2126 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2127
2128 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2129 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2130 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2131 osb->max_slots);
2132 status = -EINVAL;
2133 goto bail;
2134 }
2135
2136 ocfs2_orphan_scan_init(osb);
2137
2138 status = ocfs2_recovery_init(osb);
2139 if (status) {
2140 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2141 mlog_errno(status);
2142 goto bail;
2143 }
2144
2145 init_waitqueue_head(&osb->checkpoint_event);
2146 atomic_set(&osb->needs_checkpoint, 0);
2147
2148 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2149
2150 osb->slot_num = OCFS2_INVALID_SLOT;
2151
2152 osb->s_xattr_inline_size = le16_to_cpu(
2153 di->id2.i_super.s_xattr_inline_size);
2154
2155 osb->local_alloc_state = OCFS2_LA_UNUSED;
2156 osb->local_alloc_bh = NULL;
2157 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2158
2159 init_waitqueue_head(&osb->osb_mount_event);
2160
2161 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2162 if (status) {
2163 mlog_errno(status);
2164 goto bail;
2165 }
2166
2167 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2168 if (!osb->vol_label) {
2169 mlog(ML_ERROR, "unable to alloc vol label\n");
2170 status = -ENOMEM;
2171 goto bail;
2172 }
2173
2174 osb->slot_recovery_generations =
2175 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2176 GFP_KERNEL);
2177 if (!osb->slot_recovery_generations) {
2178 status = -ENOMEM;
2179 mlog_errno(status);
2180 goto bail;
2181 }
2182
2183 init_waitqueue_head(&osb->osb_wipe_event);
2184 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2185 sizeof(*osb->osb_orphan_wipes),
2186 GFP_KERNEL);
2187 if (!osb->osb_orphan_wipes) {
2188 status = -ENOMEM;
2189 mlog_errno(status);
2190 goto bail;
2191 }
2192
2193 osb->osb_rf_lock_tree = RB_ROOT;
2194
2195 osb->s_feature_compat =
2196 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2197 osb->s_feature_ro_compat =
2198 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2199 osb->s_feature_incompat =
2200 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2201
2202 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2203 mlog(ML_ERROR, "couldn't mount because of unsupported "
2204 "optional features (%x).\n", i);
2205 status = -EINVAL;
2206 goto bail;
2207 }
2208 if (!(osb->sb->s_flags & MS_RDONLY) &&
2209 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2210 mlog(ML_ERROR, "couldn't mount RDWR because of "
2211 "unsupported optional features (%x).\n", i);
2212 status = -EINVAL;
2213 goto bail;
2214 }
2215
2216 if (ocfs2_clusterinfo_valid(osb)) {
2217 osb->osb_stackflags =
2218 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2219 memcpy(osb->osb_cluster_stack,
2220 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2221 OCFS2_STACK_LABEL_LEN);
2222 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2223 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2224 mlog(ML_ERROR,
2225 "couldn't mount because of an invalid "
2226 "cluster stack label (%s) \n",
2227 osb->osb_cluster_stack);
2228 status = -EINVAL;
2229 goto bail;
2230 }
2231 } else {
2232 /* The empty string is identical with classic tools that
2233 * don't know about s_cluster_info. */
2234 osb->osb_cluster_stack[0] = '\0';
2235 }
2236
2237 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2238
2239 /* FIXME
2240 * This should be done in ocfs2_journal_init(), but unknown
2241 * ordering issues will cause the filesystem to crash.
2242 * If anyone wants to figure out what part of the code
2243 * refers to osb->journal before ocfs2_journal_init() is run,
2244 * be my guest.
2245 */
2246 /* initialize our journal structure */
2247
2248 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2249 if (!journal) {
2250 mlog(ML_ERROR, "unable to alloc journal\n");
2251 status = -ENOMEM;
2252 goto bail;
2253 }
2254 osb->journal = journal;
2255 journal->j_osb = osb;
2256
2257 atomic_set(&journal->j_num_trans, 0);
2258 init_rwsem(&journal->j_trans_barrier);
2259 init_waitqueue_head(&journal->j_checkpointed);
2260 spin_lock_init(&journal->j_lock);
2261 journal->j_trans_id = (unsigned long) 1;
2262 INIT_LIST_HEAD(&journal->j_la_cleanups);
2263 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2264 journal->j_state = OCFS2_JOURNAL_FREE;
2265
2266 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2267 osb->dentry_lock_list = NULL;
2268
2269 /* get some pseudo constants for clustersize bits */
2270 osb->s_clustersize_bits =
2271 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2272 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2273
2274 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2275 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2276 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2277 osb->s_clustersize);
2278 status = -EINVAL;
2279 goto bail;
2280 }
2281
2282 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2283 le32_to_cpu(di->i_clusters));
2284
2285 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2286 total_blocks);
2287 if (status) {
2288 mlog(ML_ERROR, "Volume too large "
2289 "to mount safely on this system");
2290 status = -EFBIG;
2291 goto bail;
2292 }
2293
2294 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2295 sizeof(di->id2.i_super.s_uuid))) {
2296 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2297 status = -ENOMEM;
2298 goto bail;
2299 }
2300
2301 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2302
2303 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2304 osb->vol_label[63] = '\0';
2305 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2306 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2307 osb->first_cluster_group_blkno =
2308 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2309 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2310 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2311 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2312 (unsigned long long)osb->root_blkno,
2313 (unsigned long long)osb->system_dir_blkno,
2314 osb->s_clustersize_bits);
2315
2316 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2317 if (!osb->osb_dlm_debug) {
2318 status = -ENOMEM;
2319 mlog_errno(status);
2320 goto bail;
2321 }
2322
2323 atomic_set(&osb->vol_state, VOLUME_INIT);
2324
2325 /* load root, system_dir, and all global system inodes */
2326 status = ocfs2_init_global_system_inodes(osb);
2327 if (status < 0) {
2328 mlog_errno(status);
2329 goto bail;
2330 }
2331
2332 /*
2333 * global bitmap
2334 */
2335 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2336 OCFS2_INVALID_SLOT);
2337 if (!inode) {
2338 status = -EINVAL;
2339 mlog_errno(status);
2340 goto bail;
2341 }
2342
2343 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2344 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2345 iput(inode);
2346
2347 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2348 osb->s_feature_incompat) * 8;
2349
2350 status = ocfs2_init_slot_info(osb);
2351 if (status < 0) {
2352 mlog_errno(status);
2353 goto bail;
2354 }
2355
2356 bail:
2357 return status;
2358 }
2359
2360 /*
2361 * will return: -EAGAIN if it is ok to keep searching for superblocks
2362 * -EINVAL if there is a bad superblock
2363 * 0 on success
2364 */
2365 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2366 struct buffer_head *bh,
2367 u32 blksz,
2368 struct ocfs2_blockcheck_stats *stats)
2369 {
2370 int status = -EAGAIN;
2371
2372 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2373 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2374 /* We have to do a raw check of the feature here */
2375 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2376 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2377 status = ocfs2_block_check_validate(bh->b_data,
2378 bh->b_size,
2379 &di->i_check,
2380 stats);
2381 if (status)
2382 goto out;
2383 }
2384 status = -EINVAL;
2385 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2386 mlog(ML_ERROR, "found superblock with incorrect block "
2387 "size: found %u, should be %u\n",
2388 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2389 blksz);
2390 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2391 OCFS2_MAJOR_REV_LEVEL ||
2392 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2393 OCFS2_MINOR_REV_LEVEL) {
2394 mlog(ML_ERROR, "found superblock with bad version: "
2395 "found %u.%u, should be %u.%u\n",
2396 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2397 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2398 OCFS2_MAJOR_REV_LEVEL,
2399 OCFS2_MINOR_REV_LEVEL);
2400 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2401 mlog(ML_ERROR, "bad block number on superblock: "
2402 "found %llu, should be %llu\n",
2403 (unsigned long long)le64_to_cpu(di->i_blkno),
2404 (unsigned long long)bh->b_blocknr);
2405 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2406 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2407 mlog(ML_ERROR, "bad cluster size found: %u\n",
2408 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2409 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2410 mlog(ML_ERROR, "bad root_blkno: 0\n");
2411 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2412 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2413 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2414 mlog(ML_ERROR,
2415 "Superblock slots found greater than file system "
2416 "maximum: found %u, max %u\n",
2417 le16_to_cpu(di->id2.i_super.s_max_slots),
2418 OCFS2_MAX_SLOTS);
2419 } else {
2420 /* found it! */
2421 status = 0;
2422 }
2423 }
2424
2425 out:
2426 if (status && status != -EAGAIN)
2427 mlog_errno(status);
2428 return status;
2429 }
2430
2431 static int ocfs2_check_volume(struct ocfs2_super *osb)
2432 {
2433 int status;
2434 int dirty;
2435 int local;
2436 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2437 * recover
2438 * ourselves. */
2439
2440 /* Init our journal object. */
2441 status = ocfs2_journal_init(osb->journal, &dirty);
2442 if (status < 0) {
2443 mlog(ML_ERROR, "Could not initialize journal!\n");
2444 goto finally;
2445 }
2446
2447 /* Now that journal has been initialized, check to make sure
2448 entire volume is addressable. */
2449 status = ocfs2_journal_addressable(osb);
2450 if (status)
2451 goto finally;
2452
2453 /* If the journal was unmounted cleanly then we don't want to
2454 * recover anything. Otherwise, journal_load will do that
2455 * dirty work for us :) */
2456 if (!dirty) {
2457 status = ocfs2_journal_wipe(osb->journal, 0);
2458 if (status < 0) {
2459 mlog_errno(status);
2460 goto finally;
2461 }
2462 } else {
2463 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2464 "recovering volume.\n");
2465 }
2466
2467 local = ocfs2_mount_local(osb);
2468
2469 /* will play back anything left in the journal. */
2470 status = ocfs2_journal_load(osb->journal, local, dirty);
2471 if (status < 0) {
2472 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2473 goto finally;
2474 }
2475
2476 if (dirty) {
2477 /* recover my local alloc if we didn't unmount cleanly. */
2478 status = ocfs2_begin_local_alloc_recovery(osb,
2479 osb->slot_num,
2480 &local_alloc);
2481 if (status < 0) {
2482 mlog_errno(status);
2483 goto finally;
2484 }
2485 /* we complete the recovery process after we've marked
2486 * ourselves as mounted. */
2487 }
2488
2489 status = ocfs2_load_local_alloc(osb);
2490 if (status < 0) {
2491 mlog_errno(status);
2492 goto finally;
2493 }
2494
2495 if (dirty) {
2496 /* Recovery will be completed after we've mounted the
2497 * rest of the volume. */
2498 osb->dirty = 1;
2499 osb->local_alloc_copy = local_alloc;
2500 local_alloc = NULL;
2501 }
2502
2503 /* go through each journal, trylock it and if you get the
2504 * lock, and it's marked as dirty, set the bit in the recover
2505 * map and launch a recovery thread for it. */
2506 status = ocfs2_mark_dead_nodes(osb);
2507 if (status < 0) {
2508 mlog_errno(status);
2509 goto finally;
2510 }
2511
2512 status = ocfs2_compute_replay_slots(osb);
2513 if (status < 0)
2514 mlog_errno(status);
2515
2516 finally:
2517 if (local_alloc)
2518 kfree(local_alloc);
2519
2520 if (status)
2521 mlog_errno(status);
2522 return status;
2523 }
2524
2525 /*
2526 * The routine gets called from dismount or close whenever a dismount on
2527 * volume is requested and the osb open count becomes 1.
2528 * It will remove the osb from the global list and also free up all the
2529 * initialized resources and fileobject.
2530 */
2531 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2532 {
2533 /* This function assumes that the caller has the main osb resource */
2534
2535 ocfs2_free_slot_info(osb);
2536
2537 kfree(osb->osb_orphan_wipes);
2538 kfree(osb->slot_recovery_generations);
2539 /* FIXME
2540 * This belongs in journal shutdown, but because we have to
2541 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2542 * we free it here.
2543 */
2544 kfree(osb->journal);
2545 if (osb->local_alloc_copy)
2546 kfree(osb->local_alloc_copy);
2547 kfree(osb->uuid_str);
2548 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2549 memset(osb, 0, sizeof(struct ocfs2_super));
2550 }
2551
2552 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2553 * panic(). We do not support continue-on-error operation. */
2554 static void ocfs2_handle_error(struct super_block *sb)
2555 {
2556 struct ocfs2_super *osb = OCFS2_SB(sb);
2557
2558 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2559 panic("OCFS2: (device %s): panic forced after error\n",
2560 sb->s_id);
2561
2562 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2563
2564 if (sb->s_flags & MS_RDONLY &&
2565 (ocfs2_is_soft_readonly(osb) ||
2566 ocfs2_is_hard_readonly(osb)))
2567 return;
2568
2569 printk(KERN_CRIT "File system is now read-only due to the potential "
2570 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2571 "system is unmounted.\n");
2572 sb->s_flags |= MS_RDONLY;
2573 ocfs2_set_ro_flag(osb, 0);
2574 }
2575
2576 static char error_buf[1024];
2577
2578 void __ocfs2_error(struct super_block *sb,
2579 const char *function,
2580 const char *fmt, ...)
2581 {
2582 va_list args;
2583
2584 va_start(args, fmt);
2585 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2586 va_end(args);
2587
2588 /* Not using mlog here because we want to show the actual
2589 * function the error came from. */
2590 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2591 sb->s_id, function, error_buf);
2592
2593 ocfs2_handle_error(sb);
2594 }
2595
2596 /* Handle critical errors. This is intentionally more drastic than
2597 * ocfs2_handle_error, so we only use for things like journal errors,
2598 * etc. */
2599 void __ocfs2_abort(struct super_block* sb,
2600 const char *function,
2601 const char *fmt, ...)
2602 {
2603 va_list args;
2604
2605 va_start(args, fmt);
2606 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2607 va_end(args);
2608
2609 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2610 sb->s_id, function, error_buf);
2611
2612 /* We don't have the cluster support yet to go straight to
2613 * hard readonly in here. Until then, we want to keep
2614 * ocfs2_abort() so that we can at least mark critical
2615 * errors.
2616 *
2617 * TODO: This should abort the journal and alert other nodes
2618 * that our slot needs recovery. */
2619
2620 /* Force a panic(). This stinks, but it's better than letting
2621 * things continue without having a proper hard readonly
2622 * here. */
2623 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2624 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2625 ocfs2_handle_error(sb);
2626 }
2627
2628 /*
2629 * Void signal blockers, because in-kernel sigprocmask() only fails
2630 * when SIG_* is wrong.
2631 */
2632 void ocfs2_block_signals(sigset_t *oldset)
2633 {
2634 int rc;
2635 sigset_t blocked;
2636
2637 sigfillset(&blocked);
2638 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2639 BUG_ON(rc);
2640 }
2641
2642 void ocfs2_unblock_signals(sigset_t *oldset)
2643 {
2644 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2645 BUG_ON(rc);
2646 }
2647
2648 module_init(ocfs2_init);
2649 module_exit(ocfs2_exit);
Linux with added FPC-III support