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ocfs2: fix locking for res->tracking and dlm->tracking_list
[linux/fpc-iii.git] / fs / ocfs2 / super.c
blob4f5141350af865f75c0d6adbd3999b868ee249e6
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 "xattr.h"
72 #include "quota.h"
73 #include "refcounttree.h"
74 #include "suballoc.h"
75
76 #include "buffer_head_io.h"
77
78 static struct kmem_cache *ocfs2_inode_cachep;
79 struct kmem_cache *ocfs2_dquot_cachep;
80 struct kmem_cache *ocfs2_qf_chunk_cachep;
81
82 /* OCFS2 needs to schedule several different types of work which
83 * require cluster locking, disk I/O, recovery waits, etc. Since these
84 * types of work tend to be heavy we avoid using the kernel events
85 * workqueue and schedule on our own. */
86 struct workqueue_struct *ocfs2_wq = NULL;
87
88 static struct dentry *ocfs2_debugfs_root;
89
90 MODULE_AUTHOR("Oracle");
91 MODULE_LICENSE("GPL");
92 MODULE_DESCRIPTION("OCFS2 cluster file system");
93
94 struct mount_options
95 {
96 unsigned long commit_interval;
97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
100 int localalloc_opt;
101 unsigned int resv_level;
102 int dir_resv_level;
103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
104 };
105
106 static int ocfs2_parse_options(struct super_block *sb, char *options,
107 struct mount_options *mopt,
108 int is_remount);
109 static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
112 static void ocfs2_put_super(struct super_block *sb);
113 static int ocfs2_mount_volume(struct super_block *sb);
114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116 static int ocfs2_initialize_mem_caches(void);
117 static void ocfs2_free_mem_caches(void);
118 static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
121
122 static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
127 static int ocfs2_check_volume(struct ocfs2_super *osb);
128 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
136 static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
140 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141 static void ocfs2_destroy_inode(struct inode *inode);
142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
145
146 static struct dquot **ocfs2_get_dquots(struct inode *inode)
147 {
148 return OCFS2_I(inode)->i_dquot;
149 }
150
151 static const struct super_operations ocfs2_sops = {
152 .statfs = ocfs2_statfs,
153 .alloc_inode = ocfs2_alloc_inode,
154 .destroy_inode = ocfs2_destroy_inode,
155 .drop_inode = ocfs2_drop_inode,
156 .evict_inode = ocfs2_evict_inode,
157 .sync_fs = ocfs2_sync_fs,
158 .put_super = ocfs2_put_super,
159 .remount_fs = ocfs2_remount,
160 .show_options = ocfs2_show_options,
161 .quota_read = ocfs2_quota_read,
162 .quota_write = ocfs2_quota_write,
163 .get_dquots = ocfs2_get_dquots,
164 };
165
166 enum {
167 Opt_barrier,
168 Opt_err_panic,
169 Opt_err_ro,
170 Opt_intr,
171 Opt_nointr,
172 Opt_hb_none,
173 Opt_hb_local,
174 Opt_hb_global,
175 Opt_data_ordered,
176 Opt_data_writeback,
177 Opt_atime_quantum,
178 Opt_slot,
179 Opt_commit,
180 Opt_localalloc,
181 Opt_localflocks,
182 Opt_stack,
183 Opt_user_xattr,
184 Opt_nouser_xattr,
185 Opt_inode64,
186 Opt_acl,
187 Opt_noacl,
188 Opt_usrquota,
189 Opt_grpquota,
190 Opt_coherency_buffered,
191 Opt_coherency_full,
192 Opt_resv_level,
193 Opt_dir_resv_level,
194 Opt_journal_async_commit,
195 Opt_err_cont,
196 Opt_err,
197 };
198
199 static const match_table_t tokens = {
200 {Opt_barrier, "barrier=%u"},
201 {Opt_err_panic, "errors=panic"},
202 {Opt_err_ro, "errors=remount-ro"},
203 {Opt_intr, "intr"},
204 {Opt_nointr, "nointr"},
205 {Opt_hb_none, OCFS2_HB_NONE},
206 {Opt_hb_local, OCFS2_HB_LOCAL},
207 {Opt_hb_global, OCFS2_HB_GLOBAL},
208 {Opt_data_ordered, "data=ordered"},
209 {Opt_data_writeback, "data=writeback"},
210 {Opt_atime_quantum, "atime_quantum=%u"},
211 {Opt_slot, "preferred_slot=%u"},
212 {Opt_commit, "commit=%u"},
213 {Opt_localalloc, "localalloc=%d"},
214 {Opt_localflocks, "localflocks"},
215 {Opt_stack, "cluster_stack=%s"},
216 {Opt_user_xattr, "user_xattr"},
217 {Opt_nouser_xattr, "nouser_xattr"},
218 {Opt_inode64, "inode64"},
219 {Opt_acl, "acl"},
220 {Opt_noacl, "noacl"},
221 {Opt_usrquota, "usrquota"},
222 {Opt_grpquota, "grpquota"},
223 {Opt_coherency_buffered, "coherency=buffered"},
224 {Opt_coherency_full, "coherency=full"},
225 {Opt_resv_level, "resv_level=%u"},
226 {Opt_dir_resv_level, "dir_resv_level=%u"},
227 {Opt_journal_async_commit, "journal_async_commit"},
228 {Opt_err_cont, "errors=continue"},
229 {Opt_err, NULL}
230 };
231
232 #ifdef CONFIG_DEBUG_FS
233 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
234 {
235 struct ocfs2_cluster_connection *cconn = osb->cconn;
236 struct ocfs2_recovery_map *rm = osb->recovery_map;
237 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
238 int i, out = 0;
239
240 out += snprintf(buf + out, len - out,
241 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
242 "Device", osb->dev_str, osb->uuid_str,
243 osb->fs_generation, osb->vol_label);
244
245 out += snprintf(buf + out, len - out,
246 "%10s => State: %d Flags: 0x%lX\n", "Volume",
247 atomic_read(&osb->vol_state), osb->osb_flags);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Block: %lu Cluster: %d\n", "Sizes",
251 osb->sb->s_blocksize, osb->s_clustersize);
252
253 out += snprintf(buf + out, len - out,
254 "%10s => Compat: 0x%X Incompat: 0x%X "
255 "ROcompat: 0x%X\n",
256 "Features", osb->s_feature_compat,
257 osb->s_feature_incompat, osb->s_feature_ro_compat);
258
259 out += snprintf(buf + out, len - out,
260 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
261 osb->s_mount_opt, osb->s_atime_quantum);
262
263 if (cconn) {
264 out += snprintf(buf + out, len - out,
265 "%10s => Stack: %s Name: %*s "
266 "Version: %d.%d\n", "Cluster",
267 (*osb->osb_cluster_stack == '\0' ?
268 "o2cb" : osb->osb_cluster_stack),
269 cconn->cc_namelen, cconn->cc_name,
270 cconn->cc_version.pv_major,
271 cconn->cc_version.pv_minor);
272 }
273
274 spin_lock(&osb->dc_task_lock);
275 out += snprintf(buf + out, len - out,
276 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
277 "WorkSeq: %lu\n", "DownCnvt",
278 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
279 osb->blocked_lock_count, osb->dc_wake_sequence,
280 osb->dc_work_sequence);
281 spin_unlock(&osb->dc_task_lock);
282
283 spin_lock(&osb->osb_lock);
284 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
285 "Recovery",
286 (osb->recovery_thread_task ?
287 task_pid_nr(osb->recovery_thread_task) : -1));
288 if (rm->rm_used == 0)
289 out += snprintf(buf + out, len - out, " None\n");
290 else {
291 for (i = 0; i < rm->rm_used; i++)
292 out += snprintf(buf + out, len - out, " %d",
293 rm->rm_entries[i]);
294 out += snprintf(buf + out, len - out, "\n");
295 }
296 spin_unlock(&osb->osb_lock);
297
298 out += snprintf(buf + out, len - out,
299 "%10s => Pid: %d Interval: %lu\n", "Commit",
300 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
301 osb->osb_commit_interval);
302
303 out += snprintf(buf + out, len - out,
304 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
305 "Journal", osb->journal->j_state,
306 osb->journal->j_trans_id,
307 atomic_read(&osb->journal->j_num_trans));
308
309 out += snprintf(buf + out, len - out,
310 "%10s => GlobalAllocs: %d LocalAllocs: %d "
311 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
312 "Stats",
313 atomic_read(&osb->alloc_stats.bitmap_data),
314 atomic_read(&osb->alloc_stats.local_data),
315 atomic_read(&osb->alloc_stats.bg_allocs),
316 atomic_read(&osb->alloc_stats.moves),
317 atomic_read(&osb->alloc_stats.bg_extends));
318
319 out += snprintf(buf + out, len - out,
320 "%10s => State: %u Descriptor: %llu Size: %u bits "
321 "Default: %u bits\n",
322 "LocalAlloc", osb->local_alloc_state,
323 (unsigned long long)osb->la_last_gd,
324 osb->local_alloc_bits, osb->local_alloc_default_bits);
325
326 spin_lock(&osb->osb_lock);
327 out += snprintf(buf + out, len - out,
328 "%10s => InodeSlot: %d StolenInodes: %d, "
329 "MetaSlot: %d StolenMeta: %d\n", "Steal",
330 osb->s_inode_steal_slot,
331 atomic_read(&osb->s_num_inodes_stolen),
332 osb->s_meta_steal_slot,
333 atomic_read(&osb->s_num_meta_stolen));
334 spin_unlock(&osb->osb_lock);
335
336 out += snprintf(buf + out, len - out, "OrphanScan => ");
337 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
338 os->os_count, os->os_seqno);
339 out += snprintf(buf + out, len - out, " Last Scan: ");
340 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
341 out += snprintf(buf + out, len - out, "Disabled\n");
342 else
343 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
344 (get_seconds() - os->os_scantime.tv_sec));
345
346 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
347 "Slots", "Num", "RecoGen");
348 for (i = 0; i < osb->max_slots; ++i) {
349 out += snprintf(buf + out, len - out,
350 "%10s %c %3d %10d\n",
351 " ",
352 (i == osb->slot_num ? '*' : ' '),
353 i, osb->slot_recovery_generations[i]);
354 }
355
356 return out;
357 }
358
359 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
360 {
361 struct ocfs2_super *osb = inode->i_private;
362 char *buf = NULL;
363
364 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
365 if (!buf)
366 goto bail;
367
368 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
369
370 file->private_data = buf;
371
372 return 0;
373 bail:
374 return -ENOMEM;
375 }
376
377 static int ocfs2_debug_release(struct inode *inode, struct file *file)
378 {
379 kfree(file->private_data);
380 return 0;
381 }
382
383 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
384 size_t nbytes, loff_t *ppos)
385 {
386 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
387 i_size_read(file->f_mapping->host));
388 }
389 #else
390 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
391 {
392 return 0;
393 }
394 static int ocfs2_debug_release(struct inode *inode, struct file *file)
395 {
396 return 0;
397 }
398 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
399 size_t nbytes, loff_t *ppos)
400 {
401 return 0;
402 }
403 #endif /* CONFIG_DEBUG_FS */
404
405 static const struct file_operations ocfs2_osb_debug_fops = {
406 .open = ocfs2_osb_debug_open,
407 .release = ocfs2_debug_release,
408 .read = ocfs2_debug_read,
409 .llseek = generic_file_llseek,
410 };
411
412 static int ocfs2_sync_fs(struct super_block *sb, int wait)
413 {
414 int status;
415 tid_t target;
416 struct ocfs2_super *osb = OCFS2_SB(sb);
417
418 if (ocfs2_is_hard_readonly(osb))
419 return -EROFS;
420
421 if (wait) {
422 status = ocfs2_flush_truncate_log(osb);
423 if (status < 0)
424 mlog_errno(status);
425 } else {
426 ocfs2_schedule_truncate_log_flush(osb, 0);
427 }
428
429 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
430 &target)) {
431 if (wait)
432 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
433 target);
434 }
435 return 0;
436 }
437
438 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
439 {
440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
441 && (ino == USER_QUOTA_SYSTEM_INODE
442 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
443 return 0;
444 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
445 && (ino == GROUP_QUOTA_SYSTEM_INODE
446 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
447 return 0;
448 return 1;
449 }
450
451 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
452 {
453 struct inode *new = NULL;
454 int status = 0;
455 int i;
456
457 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
458 if (IS_ERR(new)) {
459 status = PTR_ERR(new);
460 mlog_errno(status);
461 goto bail;
462 }
463 osb->root_inode = new;
464
465 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
466 if (IS_ERR(new)) {
467 status = PTR_ERR(new);
468 mlog_errno(status);
469 goto bail;
470 }
471 osb->sys_root_inode = new;
472
473 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
474 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
475 if (!ocfs2_need_system_inode(osb, i))
476 continue;
477 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
478 if (!new) {
479 ocfs2_release_system_inodes(osb);
480 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
481 mlog_errno(status);
482 mlog(ML_ERROR, "Unable to load system inode %d, "
483 "possibly corrupt fs?", i);
484 goto bail;
485 }
486 // the array now has one ref, so drop this one
487 iput(new);
488 }
489
490 bail:
491 if (status)
492 mlog_errno(status);
493 return status;
494 }
495
496 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
497 {
498 struct inode *new = NULL;
499 int status = 0;
500 int i;
501
502 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
503 i < NUM_SYSTEM_INODES;
504 i++) {
505 if (!ocfs2_need_system_inode(osb, i))
506 continue;
507 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
508 if (!new) {
509 ocfs2_release_system_inodes(osb);
510 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
511 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
512 status, i, osb->slot_num);
513 goto bail;
514 }
515 /* the array now has one ref, so drop this one */
516 iput(new);
517 }
518
519 bail:
520 if (status)
521 mlog_errno(status);
522 return status;
523 }
524
525 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
526 {
527 int i;
528 struct inode *inode;
529
530 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
531 inode = osb->global_system_inodes[i];
532 if (inode) {
533 iput(inode);
534 osb->global_system_inodes[i] = NULL;
535 }
536 }
537
538 inode = osb->sys_root_inode;
539 if (inode) {
540 iput(inode);
541 osb->sys_root_inode = NULL;
542 }
543
544 inode = osb->root_inode;
545 if (inode) {
546 iput(inode);
547 osb->root_inode = NULL;
548 }
549
550 if (!osb->local_system_inodes)
551 return;
552
553 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
554 if (osb->local_system_inodes[i]) {
555 iput(osb->local_system_inodes[i]);
556 osb->local_system_inodes[i] = NULL;
557 }
558 }
559
560 kfree(osb->local_system_inodes);
561 osb->local_system_inodes = NULL;
562 }
563
564 /* We're allocating fs objects, use GFP_NOFS */
565 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
566 {
567 struct ocfs2_inode_info *oi;
568
569 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
570 if (!oi)
571 return NULL;
572
573 oi->i_sync_tid = 0;
574 oi->i_datasync_tid = 0;
575 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
576
577 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
578 return &oi->vfs_inode;
579 }
580
581 static void ocfs2_i_callback(struct rcu_head *head)
582 {
583 struct inode *inode = container_of(head, struct inode, i_rcu);
584 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
585 }
586
587 static void ocfs2_destroy_inode(struct inode *inode)
588 {
589 call_rcu(&inode->i_rcu, ocfs2_i_callback);
590 }
591
592 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
593 unsigned int cbits)
594 {
595 unsigned int bytes = 1 << cbits;
596 unsigned int trim = bytes;
597 unsigned int bitshift = 32;
598
599 /*
600 * i_size and all block offsets in ocfs2 are always 64 bits
601 * wide. i_clusters is 32 bits, in cluster-sized units. So on
602 * 64 bit platforms, cluster size will be the limiting factor.
603 */
604
605 #if BITS_PER_LONG == 32
606 # if defined(CONFIG_LBDAF)
607 BUILD_BUG_ON(sizeof(sector_t) != 8);
608 /*
609 * We might be limited by page cache size.
610 */
611 if (bytes > PAGE_CACHE_SIZE) {
612 bytes = PAGE_CACHE_SIZE;
613 trim = 1;
614 /*
615 * Shift by 31 here so that we don't get larger than
616 * MAX_LFS_FILESIZE
617 */
618 bitshift = 31;
619 }
620 # else
621 /*
622 * We are limited by the size of sector_t. Use block size, as
623 * that's what we expose to the VFS.
624 */
625 bytes = 1 << bbits;
626 trim = 1;
627 bitshift = 31;
628 # endif
629 #endif
630
631 /*
632 * Trim by a whole cluster when we can actually approach the
633 * on-disk limits. Otherwise we can overflow i_clusters when
634 * an extent start is at the max offset.
635 */
636 return (((unsigned long long)bytes) << bitshift) - trim;
637 }
638
639 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
640 {
641 int incompat_features;
642 int ret = 0;
643 struct mount_options parsed_options;
644 struct ocfs2_super *osb = OCFS2_SB(sb);
645 u32 tmp;
646
647 sync_filesystem(sb);
648
649 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
650 !ocfs2_check_set_options(sb, &parsed_options)) {
651 ret = -EINVAL;
652 goto out;
653 }
654
655 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
656 OCFS2_MOUNT_HB_NONE;
657 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
658 ret = -EINVAL;
659 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
660 goto out;
661 }
662
663 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
664 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
665 ret = -EINVAL;
666 mlog(ML_ERROR, "Cannot change data mode on remount\n");
667 goto out;
668 }
669
670 /* Probably don't want this on remount; it might
671 * mess with other nodes */
672 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
673 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
674 ret = -EINVAL;
675 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
676 goto out;
677 }
678
679 /* We're going to/from readonly mode. */
680 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
681 /* Disable quota accounting before remounting RO */
682 if (*flags & MS_RDONLY) {
683 ret = ocfs2_susp_quotas(osb, 0);
684 if (ret < 0)
685 goto out;
686 }
687 /* Lock here so the check of HARD_RO and the potential
688 * setting of SOFT_RO is atomic. */
689 spin_lock(&osb->osb_lock);
690 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
691 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
692 ret = -EROFS;
693 goto unlock_osb;
694 }
695
696 if (*flags & MS_RDONLY) {
697 sb->s_flags |= MS_RDONLY;
698 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
699 } else {
700 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
701 mlog(ML_ERROR, "Cannot remount RDWR "
702 "filesystem due to previous errors.\n");
703 ret = -EROFS;
704 goto unlock_osb;
705 }
706 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
707 if (incompat_features) {
708 mlog(ML_ERROR, "Cannot remount RDWR because "
709 "of unsupported optional features "
710 "(%x).\n", incompat_features);
711 ret = -EINVAL;
712 goto unlock_osb;
713 }
714 sb->s_flags &= ~MS_RDONLY;
715 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
716 }
717 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
718 unlock_osb:
719 spin_unlock(&osb->osb_lock);
720 /* Enable quota accounting after remounting RW */
721 if (!ret && !(*flags & MS_RDONLY)) {
722 if (sb_any_quota_suspended(sb))
723 ret = ocfs2_susp_quotas(osb, 1);
724 else
725 ret = ocfs2_enable_quotas(osb);
726 if (ret < 0) {
727 /* Return back changes... */
728 spin_lock(&osb->osb_lock);
729 sb->s_flags |= MS_RDONLY;
730 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
731 spin_unlock(&osb->osb_lock);
732 goto out;
733 }
734 }
735 }
736
737 if (!ret) {
738 /* Only save off the new mount options in case of a successful
739 * remount. */
740 osb->s_mount_opt = parsed_options.mount_opt;
741 osb->s_atime_quantum = parsed_options.atime_quantum;
742 osb->preferred_slot = parsed_options.slot;
743 if (parsed_options.commit_interval)
744 osb->osb_commit_interval = parsed_options.commit_interval;
745
746 if (!ocfs2_is_hard_readonly(osb))
747 ocfs2_set_journal_params(osb);
748
749 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
750 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
751 MS_POSIXACL : 0);
752 }
753 out:
754 return ret;
755 }
756
757 static int ocfs2_sb_probe(struct super_block *sb,
758 struct buffer_head **bh,
759 int *sector_size,
760 struct ocfs2_blockcheck_stats *stats)
761 {
762 int status, tmpstat;
763 struct ocfs1_vol_disk_hdr *hdr;
764 struct ocfs2_dinode *di;
765 int blksize;
766
767 *bh = NULL;
768
769 /* may be > 512 */
770 *sector_size = bdev_logical_block_size(sb->s_bdev);
771 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
772 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
773 *sector_size, OCFS2_MAX_BLOCKSIZE);
774 status = -EINVAL;
775 goto bail;
776 }
777
778 /* Can this really happen? */
779 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
780 *sector_size = OCFS2_MIN_BLOCKSIZE;
781
782 /* check block zero for old format */
783 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
784 if (status < 0) {
785 mlog_errno(status);
786 goto bail;
787 }
788 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
789 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
790 mlog(ML_ERROR, "incompatible version: %u.%u\n",
791 hdr->major_version, hdr->minor_version);
792 status = -EINVAL;
793 }
794 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
795 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
796 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
797 hdr->signature);
798 status = -EINVAL;
799 }
800 brelse(*bh);
801 *bh = NULL;
802 if (status < 0) {
803 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
804 "upgraded before mounting with ocfs v2\n");
805 goto bail;
806 }
807
808 /*
809 * Now check at magic offset for 512, 1024, 2048, 4096
810 * blocksizes. 4096 is the maximum blocksize because it is
811 * the minimum clustersize.
812 */
813 status = -EINVAL;
814 for (blksize = *sector_size;
815 blksize <= OCFS2_MAX_BLOCKSIZE;
816 blksize <<= 1) {
817 tmpstat = ocfs2_get_sector(sb, bh,
818 OCFS2_SUPER_BLOCK_BLKNO,
819 blksize);
820 if (tmpstat < 0) {
821 status = tmpstat;
822 mlog_errno(status);
823 break;
824 }
825 di = (struct ocfs2_dinode *) (*bh)->b_data;
826 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
827 spin_lock_init(&stats->b_lock);
828 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
829 if (tmpstat < 0) {
830 brelse(*bh);
831 *bh = NULL;
832 }
833 if (tmpstat != -EAGAIN) {
834 status = tmpstat;
835 break;
836 }
837 }
838
839 bail:
840 return status;
841 }
842
843 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
844 {
845 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
846
847 if (osb->s_mount_opt & hb_enabled) {
848 if (ocfs2_mount_local(osb)) {
849 mlog(ML_ERROR, "Cannot heartbeat on a locally "
850 "mounted device.\n");
851 return -EINVAL;
852 }
853 if (ocfs2_userspace_stack(osb)) {
854 mlog(ML_ERROR, "Userspace stack expected, but "
855 "o2cb heartbeat arguments passed to mount\n");
856 return -EINVAL;
857 }
858 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
859 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
860 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
861 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
862 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
863 return -EINVAL;
864 }
865 }
866
867 if (!(osb->s_mount_opt & hb_enabled)) {
868 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
869 !ocfs2_userspace_stack(osb)) {
870 mlog(ML_ERROR, "Heartbeat has to be started to mount "
871 "a read-write clustered device.\n");
872 return -EINVAL;
873 }
874 }
875
876 return 0;
877 }
878
879 /*
880 * If we're using a userspace stack, mount should have passed
881 * a name that matches the disk. If not, mount should not
882 * have passed a stack.
883 */
884 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
885 struct mount_options *mopt)
886 {
887 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
888 mlog(ML_ERROR,
889 "cluster stack passed to mount, but this filesystem "
890 "does not support it\n");
891 return -EINVAL;
892 }
893
894 if (ocfs2_userspace_stack(osb) &&
895 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
896 OCFS2_STACK_LABEL_LEN)) {
897 mlog(ML_ERROR,
898 "cluster stack passed to mount (\"%s\") does not "
899 "match the filesystem (\"%s\")\n",
900 mopt->cluster_stack,
901 osb->osb_cluster_stack);
902 return -EINVAL;
903 }
904
905 return 0;
906 }
907
908 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
909 {
910 int type;
911 struct super_block *sb = osb->sb;
912 unsigned int feature[OCFS2_MAXQUOTAS] = {
913 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
914 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
915 int status = 0;
916
917 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
918 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
919 continue;
920 if (unsuspend)
921 status = dquot_resume(sb, type);
922 else {
923 struct ocfs2_mem_dqinfo *oinfo;
924
925 /* Cancel periodic syncing before suspending */
926 oinfo = sb_dqinfo(sb, type)->dqi_priv;
927 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
928 status = dquot_suspend(sb, type);
929 }
930 if (status < 0)
931 break;
932 }
933 if (status < 0)
934 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
935 "remount (error = %d).\n", status);
936 return status;
937 }
938
939 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
940 {
941 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
942 struct super_block *sb = osb->sb;
943 unsigned int feature[OCFS2_MAXQUOTAS] = {
944 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
945 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
946 unsigned int ino[OCFS2_MAXQUOTAS] = {
947 LOCAL_USER_QUOTA_SYSTEM_INODE,
948 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
949 int status;
950 int type;
951
952 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
953 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
954 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
955 continue;
956 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
957 osb->slot_num);
958 if (!inode[type]) {
959 status = -ENOENT;
960 goto out_quota_off;
961 }
962 status = dquot_enable(inode[type], type, QFMT_OCFS2,
963 DQUOT_USAGE_ENABLED);
964 if (status < 0)
965 goto out_quota_off;
966 }
967
968 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
969 iput(inode[type]);
970 return 0;
971 out_quota_off:
972 ocfs2_disable_quotas(osb);
973 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
974 iput(inode[type]);
975 mlog_errno(status);
976 return status;
977 }
978
979 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
980 {
981 int type;
982 struct inode *inode;
983 struct super_block *sb = osb->sb;
984 struct ocfs2_mem_dqinfo *oinfo;
985
986 /* We mostly ignore errors in this function because there's not much
987 * we can do when we see them */
988 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
989 if (!sb_has_quota_loaded(sb, type))
990 continue;
991 /* Cancel periodic syncing before we grab dqonoff_mutex */
992 oinfo = sb_dqinfo(sb, type)->dqi_priv;
993 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
994 inode = igrab(sb->s_dquot.files[type]);
995 /* Turn off quotas. This will remove all dquot structures from
996 * memory and so they will be automatically synced to global
997 * quota files */
998 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
999 DQUOT_LIMITS_ENABLED);
1000 if (!inode)
1001 continue;
1002 iput(inode);
1003 }
1004 }
1005
1006 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1007 {
1008 struct dentry *root;
1009 int status, sector_size;
1010 struct mount_options parsed_options;
1011 struct inode *inode = NULL;
1012 struct ocfs2_super *osb = NULL;
1013 struct buffer_head *bh = NULL;
1014 char nodestr[12];
1015 struct ocfs2_blockcheck_stats stats;
1016
1017 trace_ocfs2_fill_super(sb, data, silent);
1018
1019 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1020 status = -EINVAL;
1021 goto read_super_error;
1022 }
1023
1024 /* probe for superblock */
1025 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1026 if (status < 0) {
1027 mlog(ML_ERROR, "superblock probe failed!\n");
1028 goto read_super_error;
1029 }
1030
1031 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1032 osb = OCFS2_SB(sb);
1033 if (status < 0) {
1034 mlog_errno(status);
1035 goto read_super_error;
1036 }
1037 brelse(bh);
1038 bh = NULL;
1039
1040 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1041 status = -EINVAL;
1042 goto read_super_error;
1043 }
1044 osb->s_mount_opt = parsed_options.mount_opt;
1045 osb->s_atime_quantum = parsed_options.atime_quantum;
1046 osb->preferred_slot = parsed_options.slot;
1047 osb->osb_commit_interval = parsed_options.commit_interval;
1048
1049 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1050 osb->osb_resv_level = parsed_options.resv_level;
1051 osb->osb_dir_resv_level = parsed_options.resv_level;
1052 if (parsed_options.dir_resv_level == -1)
1053 osb->osb_dir_resv_level = parsed_options.resv_level;
1054 else
1055 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1056
1057 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1058 if (status)
1059 goto read_super_error;
1060
1061 sb->s_magic = OCFS2_SUPER_MAGIC;
1062
1063 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1064 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1065
1066 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1067 * heartbeat=none */
1068 if (bdev_read_only(sb->s_bdev)) {
1069 if (!(sb->s_flags & MS_RDONLY)) {
1070 status = -EACCES;
1071 mlog(ML_ERROR, "Readonly device detected but readonly "
1072 "mount was not specified.\n");
1073 goto read_super_error;
1074 }
1075
1076 /* You should not be able to start a local heartbeat
1077 * on a readonly device. */
1078 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1079 status = -EROFS;
1080 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1081 "device.\n");
1082 goto read_super_error;
1083 }
1084
1085 status = ocfs2_check_journals_nolocks(osb);
1086 if (status < 0) {
1087 if (status == -EROFS)
1088 mlog(ML_ERROR, "Recovery required on readonly "
1089 "file system, but write access is "
1090 "unavailable.\n");
1091 else
1092 mlog_errno(status);
1093 goto read_super_error;
1094 }
1095
1096 ocfs2_set_ro_flag(osb, 1);
1097
1098 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1099 "Cluster services will not be used for this mount. "
1100 "Recovery will be skipped.\n", osb->dev_str);
1101 }
1102
1103 if (!ocfs2_is_hard_readonly(osb)) {
1104 if (sb->s_flags & MS_RDONLY)
1105 ocfs2_set_ro_flag(osb, 0);
1106 }
1107
1108 status = ocfs2_verify_heartbeat(osb);
1109 if (status < 0) {
1110 mlog_errno(status);
1111 goto read_super_error;
1112 }
1113
1114 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1115 ocfs2_debugfs_root);
1116 if (!osb->osb_debug_root) {
1117 status = -EINVAL;
1118 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1119 goto read_super_error;
1120 }
1121
1122 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1123 osb->osb_debug_root,
1124 osb,
1125 &ocfs2_osb_debug_fops);
1126 if (!osb->osb_ctxt) {
1127 status = -EINVAL;
1128 mlog_errno(status);
1129 goto read_super_error;
1130 }
1131
1132 if (ocfs2_meta_ecc(osb)) {
1133 status = ocfs2_blockcheck_stats_debugfs_install(
1134 &osb->osb_ecc_stats,
1135 osb->osb_debug_root);
1136 if (status) {
1137 mlog(ML_ERROR,
1138 "Unable to create blockcheck statistics "
1139 "files\n");
1140 goto read_super_error;
1141 }
1142 }
1143
1144 status = ocfs2_mount_volume(sb);
1145 if (status < 0)
1146 goto read_super_error;
1147
1148 if (osb->root_inode)
1149 inode = igrab(osb->root_inode);
1150
1151 if (!inode) {
1152 status = -EIO;
1153 mlog_errno(status);
1154 goto read_super_error;
1155 }
1156
1157 root = d_make_root(inode);
1158 if (!root) {
1159 status = -ENOMEM;
1160 mlog_errno(status);
1161 goto read_super_error;
1162 }
1163
1164 sb->s_root = root;
1165
1166 ocfs2_complete_mount_recovery(osb);
1167
1168 if (ocfs2_mount_local(osb))
1169 snprintf(nodestr, sizeof(nodestr), "local");
1170 else
1171 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1172
1173 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1174 "with %s data mode.\n",
1175 osb->dev_str, nodestr, osb->slot_num,
1176 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1177 "ordered");
1178
1179 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1180 wake_up(&osb->osb_mount_event);
1181
1182 /* Now we can initialize quotas because we can afford to wait
1183 * for cluster locks recovery now. That also means that truncation
1184 * log recovery can happen but that waits for proper quota setup */
1185 if (!(sb->s_flags & MS_RDONLY)) {
1186 status = ocfs2_enable_quotas(osb);
1187 if (status < 0) {
1188 /* We have to err-out specially here because
1189 * s_root is already set */
1190 mlog_errno(status);
1191 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1192 wake_up(&osb->osb_mount_event);
1193 return status;
1194 }
1195 }
1196
1197 ocfs2_complete_quota_recovery(osb);
1198
1199 /* Now we wake up again for processes waiting for quotas */
1200 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1201 wake_up(&osb->osb_mount_event);
1202
1203 /* Start this when the mount is almost sure of being successful */
1204 ocfs2_orphan_scan_start(osb);
1205
1206 return status;
1207
1208 read_super_error:
1209 brelse(bh);
1210
1211 if (osb) {
1212 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1213 wake_up(&osb->osb_mount_event);
1214 ocfs2_dismount_volume(sb, 1);
1215 }
1216
1217 if (status)
1218 mlog_errno(status);
1219 return status;
1220 }
1221
1222 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1223 int flags,
1224 const char *dev_name,
1225 void *data)
1226 {
1227 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1228 }
1229
1230 static struct file_system_type ocfs2_fs_type = {
1231 .owner = THIS_MODULE,
1232 .name = "ocfs2",
1233 .mount = ocfs2_mount,
1234 .kill_sb = kill_block_super,
1235 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1236 .next = NULL
1237 };
1238 MODULE_ALIAS_FS("ocfs2");
1239
1240 static int ocfs2_check_set_options(struct super_block *sb,
1241 struct mount_options *options)
1242 {
1243 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1244 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1245 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1246 mlog(ML_ERROR, "User quotas were requested, but this "
1247 "filesystem does not have the feature enabled.\n");
1248 return 0;
1249 }
1250 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1251 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1252 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1253 mlog(ML_ERROR, "Group quotas were requested, but this "
1254 "filesystem does not have the feature enabled.\n");
1255 return 0;
1256 }
1257 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1258 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1259 mlog(ML_ERROR, "ACL support requested but extended attributes "
1260 "feature is not enabled\n");
1261 return 0;
1262 }
1263 /* No ACL setting specified? Use XATTR feature... */
1264 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1265 OCFS2_MOUNT_NO_POSIX_ACL))) {
1266 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1267 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1268 else
1269 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1270 }
1271 return 1;
1272 }
1273
1274 static int ocfs2_parse_options(struct super_block *sb,
1275 char *options,
1276 struct mount_options *mopt,
1277 int is_remount)
1278 {
1279 int status, user_stack = 0;
1280 char *p;
1281 u32 tmp;
1282
1283 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1284
1285 mopt->commit_interval = 0;
1286 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1287 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1288 mopt->slot = OCFS2_INVALID_SLOT;
1289 mopt->localalloc_opt = -1;
1290 mopt->cluster_stack[0] = '\0';
1291 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1292 mopt->dir_resv_level = -1;
1293
1294 if (!options) {
1295 status = 1;
1296 goto bail;
1297 }
1298
1299 while ((p = strsep(&options, ",")) != NULL) {
1300 int token, option;
1301 substring_t args[MAX_OPT_ARGS];
1302
1303 if (!*p)
1304 continue;
1305
1306 token = match_token(p, tokens, args);
1307 switch (token) {
1308 case Opt_hb_local:
1309 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1310 break;
1311 case Opt_hb_none:
1312 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1313 break;
1314 case Opt_hb_global:
1315 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1316 break;
1317 case Opt_barrier:
1318 if (match_int(&args[0], &option)) {
1319 status = 0;
1320 goto bail;
1321 }
1322 if (option)
1323 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1324 else
1325 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1326 break;
1327 case Opt_intr:
1328 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1329 break;
1330 case Opt_nointr:
1331 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1332 break;
1333 case Opt_err_panic:
1334 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1335 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1336 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1337 break;
1338 case Opt_err_ro:
1339 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1340 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1341 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1342 break;
1343 case Opt_err_cont:
1344 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1345 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1346 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1347 break;
1348 case Opt_data_ordered:
1349 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1350 break;
1351 case Opt_data_writeback:
1352 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1353 break;
1354 case Opt_user_xattr:
1355 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1356 break;
1357 case Opt_nouser_xattr:
1358 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1359 break;
1360 case Opt_atime_quantum:
1361 if (match_int(&args[0], &option)) {
1362 status = 0;
1363 goto bail;
1364 }
1365 if (option >= 0)
1366 mopt->atime_quantum = option;
1367 break;
1368 case Opt_slot:
1369 option = 0;
1370 if (match_int(&args[0], &option)) {
1371 status = 0;
1372 goto bail;
1373 }
1374 if (option)
1375 mopt->slot = (s16)option;
1376 break;
1377 case Opt_commit:
1378 option = 0;
1379 if (match_int(&args[0], &option)) {
1380 status = 0;
1381 goto bail;
1382 }
1383 if (option < 0)
1384 return 0;
1385 if (option == 0)
1386 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1387 mopt->commit_interval = HZ * option;
1388 break;
1389 case Opt_localalloc:
1390 option = 0;
1391 if (match_int(&args[0], &option)) {
1392 status = 0;
1393 goto bail;
1394 }
1395 if (option >= 0)
1396 mopt->localalloc_opt = option;
1397 break;
1398 case Opt_localflocks:
1399 /*
1400 * Changing this during remount could race
1401 * flock() requests, or "unbalance" existing
1402 * ones (e.g., a lock is taken in one mode but
1403 * dropped in the other). If users care enough
1404 * to flip locking modes during remount, we
1405 * could add a "local" flag to individual
1406 * flock structures for proper tracking of
1407 * state.
1408 */
1409 if (!is_remount)
1410 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1411 break;
1412 case Opt_stack:
1413 /* Check both that the option we were passed
1414 * is of the right length and that it is a proper
1415 * string of the right length.
1416 */
1417 if (((args[0].to - args[0].from) !=
1418 OCFS2_STACK_LABEL_LEN) ||
1419 (strnlen(args[0].from,
1420 OCFS2_STACK_LABEL_LEN) !=
1421 OCFS2_STACK_LABEL_LEN)) {
1422 mlog(ML_ERROR,
1423 "Invalid cluster_stack option\n");
1424 status = 0;
1425 goto bail;
1426 }
1427 memcpy(mopt->cluster_stack, args[0].from,
1428 OCFS2_STACK_LABEL_LEN);
1429 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1430 /*
1431 * Open code the memcmp here as we don't have
1432 * an osb to pass to
1433 * ocfs2_userspace_stack().
1434 */
1435 if (memcmp(mopt->cluster_stack,
1436 OCFS2_CLASSIC_CLUSTER_STACK,
1437 OCFS2_STACK_LABEL_LEN))
1438 user_stack = 1;
1439 break;
1440 case Opt_inode64:
1441 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1442 break;
1443 case Opt_usrquota:
1444 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1445 break;
1446 case Opt_grpquota:
1447 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1448 break;
1449 case Opt_coherency_buffered:
1450 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1451 break;
1452 case Opt_coherency_full:
1453 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1454 break;
1455 case Opt_acl:
1456 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1457 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1458 break;
1459 case Opt_noacl:
1460 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1461 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1462 break;
1463 case Opt_resv_level:
1464 if (is_remount)
1465 break;
1466 if (match_int(&args[0], &option)) {
1467 status = 0;
1468 goto bail;
1469 }
1470 if (option >= OCFS2_MIN_RESV_LEVEL &&
1471 option < OCFS2_MAX_RESV_LEVEL)
1472 mopt->resv_level = option;
1473 break;
1474 case Opt_dir_resv_level:
1475 if (is_remount)
1476 break;
1477 if (match_int(&args[0], &option)) {
1478 status = 0;
1479 goto bail;
1480 }
1481 if (option >= OCFS2_MIN_RESV_LEVEL &&
1482 option < OCFS2_MAX_RESV_LEVEL)
1483 mopt->dir_resv_level = option;
1484 break;
1485 case Opt_journal_async_commit:
1486 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1487 break;
1488 default:
1489 mlog(ML_ERROR,
1490 "Unrecognized mount option \"%s\" "
1491 "or missing value\n", p);
1492 status = 0;
1493 goto bail;
1494 }
1495 }
1496
1497 if (user_stack == 0) {
1498 /* Ensure only one heartbeat mode */
1499 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1500 OCFS2_MOUNT_HB_GLOBAL |
1501 OCFS2_MOUNT_HB_NONE);
1502 if (hweight32(tmp) != 1) {
1503 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1504 status = 0;
1505 goto bail;
1506 }
1507 }
1508
1509 status = 1;
1510
1511 bail:
1512 return status;
1513 }
1514
1515 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1516 {
1517 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1518 unsigned long opts = osb->s_mount_opt;
1519 unsigned int local_alloc_megs;
1520
1521 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1522 seq_printf(s, ",_netdev");
1523 if (opts & OCFS2_MOUNT_HB_LOCAL)
1524 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1525 else
1526 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1527 } else
1528 seq_printf(s, ",%s", OCFS2_HB_NONE);
1529
1530 if (opts & OCFS2_MOUNT_NOINTR)
1531 seq_printf(s, ",nointr");
1532
1533 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1534 seq_printf(s, ",data=writeback");
1535 else
1536 seq_printf(s, ",data=ordered");
1537
1538 if (opts & OCFS2_MOUNT_BARRIER)
1539 seq_printf(s, ",barrier=1");
1540
1541 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1542 seq_printf(s, ",errors=panic");
1543 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1544 seq_printf(s, ",errors=continue");
1545 else
1546 seq_printf(s, ",errors=remount-ro");
1547
1548 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1549 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1550
1551 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1552
1553 if (osb->osb_commit_interval)
1554 seq_printf(s, ",commit=%u",
1555 (unsigned) (osb->osb_commit_interval / HZ));
1556
1557 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1558 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1559 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1560
1561 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1562 seq_printf(s, ",localflocks,");
1563
1564 if (osb->osb_cluster_stack[0])
1565 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1566 OCFS2_STACK_LABEL_LEN);
1567 if (opts & OCFS2_MOUNT_USRQUOTA)
1568 seq_printf(s, ",usrquota");
1569 if (opts & OCFS2_MOUNT_GRPQUOTA)
1570 seq_printf(s, ",grpquota");
1571
1572 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1573 seq_printf(s, ",coherency=buffered");
1574 else
1575 seq_printf(s, ",coherency=full");
1576
1577 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1578 seq_printf(s, ",nouser_xattr");
1579 else
1580 seq_printf(s, ",user_xattr");
1581
1582 if (opts & OCFS2_MOUNT_INODE64)
1583 seq_printf(s, ",inode64");
1584
1585 if (opts & OCFS2_MOUNT_POSIX_ACL)
1586 seq_printf(s, ",acl");
1587 else
1588 seq_printf(s, ",noacl");
1589
1590 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1591 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1592
1593 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1594 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1595
1596 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1597 seq_printf(s, ",journal_async_commit");
1598
1599 return 0;
1600 }
1601
1602 static int __init ocfs2_init(void)
1603 {
1604 int status;
1605
1606 status = init_ocfs2_uptodate_cache();
1607 if (status < 0)
1608 goto out1;
1609
1610 status = ocfs2_initialize_mem_caches();
1611 if (status < 0)
1612 goto out2;
1613
1614 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1615 if (!ocfs2_wq) {
1616 status = -ENOMEM;
1617 goto out3;
1618 }
1619
1620 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1621 if (!ocfs2_debugfs_root) {
1622 status = -ENOMEM;
1623 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1624 goto out4;
1625 }
1626
1627 ocfs2_set_locking_protocol();
1628
1629 status = register_quota_format(&ocfs2_quota_format);
1630 if (status < 0)
1631 goto out4;
1632 status = register_filesystem(&ocfs2_fs_type);
1633 if (!status)
1634 return 0;
1635
1636 unregister_quota_format(&ocfs2_quota_format);
1637 out4:
1638 destroy_workqueue(ocfs2_wq);
1639 debugfs_remove(ocfs2_debugfs_root);
1640 out3:
1641 ocfs2_free_mem_caches();
1642 out2:
1643 exit_ocfs2_uptodate_cache();
1644 out1:
1645 mlog_errno(status);
1646 return status;
1647 }
1648
1649 static void __exit ocfs2_exit(void)
1650 {
1651 if (ocfs2_wq) {
1652 flush_workqueue(ocfs2_wq);
1653 destroy_workqueue(ocfs2_wq);
1654 }
1655
1656 unregister_quota_format(&ocfs2_quota_format);
1657
1658 debugfs_remove(ocfs2_debugfs_root);
1659
1660 ocfs2_free_mem_caches();
1661
1662 unregister_filesystem(&ocfs2_fs_type);
1663
1664 exit_ocfs2_uptodate_cache();
1665 }
1666
1667 static void ocfs2_put_super(struct super_block *sb)
1668 {
1669 trace_ocfs2_put_super(sb);
1670
1671 ocfs2_sync_blockdev(sb);
1672 ocfs2_dismount_volume(sb, 0);
1673 }
1674
1675 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1676 {
1677 struct ocfs2_super *osb;
1678 u32 numbits, freebits;
1679 int status;
1680 struct ocfs2_dinode *bm_lock;
1681 struct buffer_head *bh = NULL;
1682 struct inode *inode = NULL;
1683
1684 trace_ocfs2_statfs(dentry->d_sb, buf);
1685
1686 osb = OCFS2_SB(dentry->d_sb);
1687
1688 inode = ocfs2_get_system_file_inode(osb,
1689 GLOBAL_BITMAP_SYSTEM_INODE,
1690 OCFS2_INVALID_SLOT);
1691 if (!inode) {
1692 mlog(ML_ERROR, "failed to get bitmap inode\n");
1693 status = -EIO;
1694 goto bail;
1695 }
1696
1697 status = ocfs2_inode_lock(inode, &bh, 0);
1698 if (status < 0) {
1699 mlog_errno(status);
1700 goto bail;
1701 }
1702
1703 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1704
1705 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1706 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1707
1708 buf->f_type = OCFS2_SUPER_MAGIC;
1709 buf->f_bsize = dentry->d_sb->s_blocksize;
1710 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1711 buf->f_blocks = ((sector_t) numbits) *
1712 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1713 buf->f_bfree = ((sector_t) freebits) *
1714 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1715 buf->f_bavail = buf->f_bfree;
1716 buf->f_files = numbits;
1717 buf->f_ffree = freebits;
1718 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1719 & 0xFFFFFFFFUL;
1720 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1721 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1722
1723 brelse(bh);
1724
1725 ocfs2_inode_unlock(inode, 0);
1726 status = 0;
1727 bail:
1728 if (inode)
1729 iput(inode);
1730
1731 if (status)
1732 mlog_errno(status);
1733
1734 return status;
1735 }
1736
1737 static void ocfs2_inode_init_once(void *data)
1738 {
1739 struct ocfs2_inode_info *oi = data;
1740
1741 oi->ip_flags = 0;
1742 oi->ip_open_count = 0;
1743 spin_lock_init(&oi->ip_lock);
1744 ocfs2_extent_map_init(&oi->vfs_inode);
1745 INIT_LIST_HEAD(&oi->ip_io_markers);
1746 oi->ip_dir_start_lookup = 0;
1747 mutex_init(&oi->ip_unaligned_aio);
1748 init_rwsem(&oi->ip_alloc_sem);
1749 init_rwsem(&oi->ip_xattr_sem);
1750 mutex_init(&oi->ip_io_mutex);
1751
1752 oi->ip_blkno = 0ULL;
1753 oi->ip_clusters = 0;
1754
1755 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1756
1757 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1758 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1759 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1760
1761 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1762 &ocfs2_inode_caching_ops);
1763
1764 inode_init_once(&oi->vfs_inode);
1765 }
1766
1767 static int ocfs2_initialize_mem_caches(void)
1768 {
1769 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1770 sizeof(struct ocfs2_inode_info),
1771 0,
1772 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1773 SLAB_MEM_SPREAD),
1774 ocfs2_inode_init_once);
1775 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1776 sizeof(struct ocfs2_dquot),
1777 0,
1778 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1779 SLAB_MEM_SPREAD),
1780 NULL);
1781 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1782 sizeof(struct ocfs2_quota_chunk),
1783 0,
1784 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1785 NULL);
1786 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1787 !ocfs2_qf_chunk_cachep) {
1788 if (ocfs2_inode_cachep)
1789 kmem_cache_destroy(ocfs2_inode_cachep);
1790 if (ocfs2_dquot_cachep)
1791 kmem_cache_destroy(ocfs2_dquot_cachep);
1792 if (ocfs2_qf_chunk_cachep)
1793 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1794 return -ENOMEM;
1795 }
1796
1797 return 0;
1798 }
1799
1800 static void ocfs2_free_mem_caches(void)
1801 {
1802 /*
1803 * Make sure all delayed rcu free inodes are flushed before we
1804 * destroy cache.
1805 */
1806 rcu_barrier();
1807 if (ocfs2_inode_cachep)
1808 kmem_cache_destroy(ocfs2_inode_cachep);
1809 ocfs2_inode_cachep = NULL;
1810
1811 if (ocfs2_dquot_cachep)
1812 kmem_cache_destroy(ocfs2_dquot_cachep);
1813 ocfs2_dquot_cachep = NULL;
1814
1815 if (ocfs2_qf_chunk_cachep)
1816 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1817 ocfs2_qf_chunk_cachep = NULL;
1818 }
1819
1820 static int ocfs2_get_sector(struct super_block *sb,
1821 struct buffer_head **bh,
1822 int block,
1823 int sect_size)
1824 {
1825 if (!sb_set_blocksize(sb, sect_size)) {
1826 mlog(ML_ERROR, "unable to set blocksize\n");
1827 return -EIO;
1828 }
1829
1830 *bh = sb_getblk(sb, block);
1831 if (!*bh) {
1832 mlog_errno(-ENOMEM);
1833 return -ENOMEM;
1834 }
1835 lock_buffer(*bh);
1836 if (!buffer_dirty(*bh))
1837 clear_buffer_uptodate(*bh);
1838 unlock_buffer(*bh);
1839 ll_rw_block(READ, 1, bh);
1840 wait_on_buffer(*bh);
1841 if (!buffer_uptodate(*bh)) {
1842 mlog_errno(-EIO);
1843 brelse(*bh);
1844 *bh = NULL;
1845 return -EIO;
1846 }
1847
1848 return 0;
1849 }
1850
1851 static int ocfs2_mount_volume(struct super_block *sb)
1852 {
1853 int status = 0;
1854 int unlock_super = 0;
1855 struct ocfs2_super *osb = OCFS2_SB(sb);
1856
1857 if (ocfs2_is_hard_readonly(osb))
1858 goto leave;
1859
1860 status = ocfs2_dlm_init(osb);
1861 if (status < 0) {
1862 mlog_errno(status);
1863 goto leave;
1864 }
1865
1866 status = ocfs2_super_lock(osb, 1);
1867 if (status < 0) {
1868 mlog_errno(status);
1869 goto leave;
1870 }
1871 unlock_super = 1;
1872
1873 /* This will load up the node map and add ourselves to it. */
1874 status = ocfs2_find_slot(osb);
1875 if (status < 0) {
1876 mlog_errno(status);
1877 goto leave;
1878 }
1879
1880 /* load all node-local system inodes */
1881 status = ocfs2_init_local_system_inodes(osb);
1882 if (status < 0) {
1883 mlog_errno(status);
1884 goto leave;
1885 }
1886
1887 status = ocfs2_check_volume(osb);
1888 if (status < 0) {
1889 mlog_errno(status);
1890 goto leave;
1891 }
1892
1893 status = ocfs2_truncate_log_init(osb);
1894 if (status < 0)
1895 mlog_errno(status);
1896
1897 leave:
1898 if (unlock_super)
1899 ocfs2_super_unlock(osb, 1);
1900
1901 return status;
1902 }
1903
1904 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1905 {
1906 int tmp, hangup_needed = 0;
1907 struct ocfs2_super *osb = NULL;
1908 char nodestr[12];
1909
1910 trace_ocfs2_dismount_volume(sb);
1911
1912 BUG_ON(!sb);
1913 osb = OCFS2_SB(sb);
1914 BUG_ON(!osb);
1915
1916 debugfs_remove(osb->osb_ctxt);
1917
1918 /* Orphan scan should be stopped as early as possible */
1919 ocfs2_orphan_scan_stop(osb);
1920
1921 ocfs2_disable_quotas(osb);
1922
1923 /* All dquots should be freed by now */
1924 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1925 /* Wait for worker to be done with the work structure in osb */
1926 cancel_work_sync(&osb->dquot_drop_work);
1927
1928 ocfs2_shutdown_local_alloc(osb);
1929
1930 ocfs2_truncate_log_shutdown(osb);
1931
1932 /* This will disable recovery and flush any recovery work. */
1933 ocfs2_recovery_exit(osb);
1934
1935 ocfs2_journal_shutdown(osb);
1936
1937 ocfs2_sync_blockdev(sb);
1938
1939 ocfs2_purge_refcount_trees(osb);
1940
1941 /* No cluster connection means we've failed during mount, so skip
1942 * all the steps which depended on that to complete. */
1943 if (osb->cconn) {
1944 tmp = ocfs2_super_lock(osb, 1);
1945 if (tmp < 0) {
1946 mlog_errno(tmp);
1947 return;
1948 }
1949 }
1950
1951 if (osb->slot_num != OCFS2_INVALID_SLOT)
1952 ocfs2_put_slot(osb);
1953
1954 if (osb->cconn)
1955 ocfs2_super_unlock(osb, 1);
1956
1957 ocfs2_release_system_inodes(osb);
1958
1959 /*
1960 * If we're dismounting due to mount error, mount.ocfs2 will clean
1961 * up heartbeat. If we're a local mount, there is no heartbeat.
1962 * If we failed before we got a uuid_str yet, we can't stop
1963 * heartbeat. Otherwise, do it.
1964 */
1965 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1966 !ocfs2_is_hard_readonly(osb))
1967 hangup_needed = 1;
1968
1969 if (osb->cconn)
1970 ocfs2_dlm_shutdown(osb, hangup_needed);
1971
1972 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1973 debugfs_remove(osb->osb_debug_root);
1974
1975 if (hangup_needed)
1976 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1977
1978 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1979
1980 if (ocfs2_mount_local(osb))
1981 snprintf(nodestr, sizeof(nodestr), "local");
1982 else
1983 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1984
1985 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1986 osb->dev_str, nodestr);
1987
1988 ocfs2_delete_osb(osb);
1989 kfree(osb);
1990 sb->s_dev = 0;
1991 sb->s_fs_info = NULL;
1992 }
1993
1994 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1995 unsigned uuid_bytes)
1996 {
1997 int i, ret;
1998 char *ptr;
1999
2000 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2001
2002 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2003 if (osb->uuid_str == NULL)
2004 return -ENOMEM;
2005
2006 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2007 /* print with null */
2008 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2009 if (ret != 2) /* drop super cleans up */
2010 return -EINVAL;
2011 /* then only advance past the last char */
2012 ptr += 2;
2013 }
2014
2015 return 0;
2016 }
2017
2018 /* Make sure entire volume is addressable by our journal. Requires
2019 osb_clusters_at_boot to be valid and for the journal to have been
2020 initialized by ocfs2_journal_init(). */
2021 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2022 {
2023 int status = 0;
2024 u64 max_block =
2025 ocfs2_clusters_to_blocks(osb->sb,
2026 osb->osb_clusters_at_boot) - 1;
2027
2028 /* 32-bit block number is always OK. */
2029 if (max_block <= (u32)~0ULL)
2030 goto out;
2031
2032 /* Volume is "huge", so see if our journal is new enough to
2033 support it. */
2034 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2035 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2036 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2037 JBD2_FEATURE_INCOMPAT_64BIT))) {
2038 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2039 "Enable the 'block64' journal option with tunefs.ocfs2");
2040 status = -EFBIG;
2041 goto out;
2042 }
2043
2044 out:
2045 return status;
2046 }
2047
2048 static int ocfs2_initialize_super(struct super_block *sb,
2049 struct buffer_head *bh,
2050 int sector_size,
2051 struct ocfs2_blockcheck_stats *stats)
2052 {
2053 int status;
2054 int i, cbits, bbits;
2055 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2056 struct inode *inode = NULL;
2057 struct ocfs2_journal *journal;
2058 struct ocfs2_super *osb;
2059 u64 total_blocks;
2060
2061 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2062 if (!osb) {
2063 status = -ENOMEM;
2064 mlog_errno(status);
2065 goto bail;
2066 }
2067
2068 sb->s_fs_info = osb;
2069 sb->s_op = &ocfs2_sops;
2070 sb->s_d_op = &ocfs2_dentry_ops;
2071 sb->s_export_op = &ocfs2_export_ops;
2072 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2073 sb->dq_op = &ocfs2_quota_operations;
2074 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2075 sb->s_xattr = ocfs2_xattr_handlers;
2076 sb->s_time_gran = 1;
2077 sb->s_flags |= MS_NOATIME;
2078 /* this is needed to support O_LARGEFILE */
2079 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2080 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2081 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2082 memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
2083 sizeof(di->id2.i_super.s_uuid));
2084
2085 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2086
2087 for (i = 0; i < 3; i++)
2088 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2089 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2090
2091 osb->sb = sb;
2092 /* Save off for ocfs2_rw_direct */
2093 osb->s_sectsize_bits = blksize_bits(sector_size);
2094 BUG_ON(!osb->s_sectsize_bits);
2095
2096 spin_lock_init(&osb->dc_task_lock);
2097 init_waitqueue_head(&osb->dc_event);
2098 osb->dc_work_sequence = 0;
2099 osb->dc_wake_sequence = 0;
2100 INIT_LIST_HEAD(&osb->blocked_lock_list);
2101 osb->blocked_lock_count = 0;
2102 spin_lock_init(&osb->osb_lock);
2103 spin_lock_init(&osb->osb_xattr_lock);
2104 ocfs2_init_steal_slots(osb);
2105
2106 mutex_init(&osb->system_file_mutex);
2107
2108 atomic_set(&osb->alloc_stats.moves, 0);
2109 atomic_set(&osb->alloc_stats.local_data, 0);
2110 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2111 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2112 atomic_set(&osb->alloc_stats.bg_extends, 0);
2113
2114 /* Copy the blockcheck stats from the superblock probe */
2115 osb->osb_ecc_stats = *stats;
2116
2117 ocfs2_init_node_maps(osb);
2118
2119 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2120 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2121
2122 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2123 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2124 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2125 osb->max_slots);
2126 status = -EINVAL;
2127 goto bail;
2128 }
2129
2130 ocfs2_orphan_scan_init(osb);
2131
2132 status = ocfs2_recovery_init(osb);
2133 if (status) {
2134 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2135 mlog_errno(status);
2136 goto bail;
2137 }
2138
2139 init_waitqueue_head(&osb->checkpoint_event);
2140
2141 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2142
2143 osb->slot_num = OCFS2_INVALID_SLOT;
2144
2145 osb->s_xattr_inline_size = le16_to_cpu(
2146 di->id2.i_super.s_xattr_inline_size);
2147
2148 osb->local_alloc_state = OCFS2_LA_UNUSED;
2149 osb->local_alloc_bh = NULL;
2150 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2151
2152 init_waitqueue_head(&osb->osb_mount_event);
2153
2154 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2155 if (status) {
2156 mlog_errno(status);
2157 goto bail;
2158 }
2159
2160 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2161 if (!osb->vol_label) {
2162 mlog(ML_ERROR, "unable to alloc vol label\n");
2163 status = -ENOMEM;
2164 goto bail;
2165 }
2166
2167 osb->slot_recovery_generations =
2168 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2169 GFP_KERNEL);
2170 if (!osb->slot_recovery_generations) {
2171 status = -ENOMEM;
2172 mlog_errno(status);
2173 goto bail;
2174 }
2175
2176 init_waitqueue_head(&osb->osb_wipe_event);
2177 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2178 sizeof(*osb->osb_orphan_wipes),
2179 GFP_KERNEL);
2180 if (!osb->osb_orphan_wipes) {
2181 status = -ENOMEM;
2182 mlog_errno(status);
2183 goto bail;
2184 }
2185
2186 osb->osb_rf_lock_tree = RB_ROOT;
2187
2188 osb->s_feature_compat =
2189 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2190 osb->s_feature_ro_compat =
2191 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2192 osb->s_feature_incompat =
2193 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2194
2195 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2196 mlog(ML_ERROR, "couldn't mount because of unsupported "
2197 "optional features (%x).\n", i);
2198 status = -EINVAL;
2199 goto bail;
2200 }
2201 if (!(osb->sb->s_flags & MS_RDONLY) &&
2202 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2203 mlog(ML_ERROR, "couldn't mount RDWR because of "
2204 "unsupported optional features (%x).\n", i);
2205 status = -EINVAL;
2206 goto bail;
2207 }
2208
2209 if (ocfs2_clusterinfo_valid(osb)) {
2210 osb->osb_stackflags =
2211 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2212 strlcpy(osb->osb_cluster_stack,
2213 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2214 OCFS2_STACK_LABEL_LEN + 1);
2215 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2216 mlog(ML_ERROR,
2217 "couldn't mount because of an invalid "
2218 "cluster stack label (%s) \n",
2219 osb->osb_cluster_stack);
2220 status = -EINVAL;
2221 goto bail;
2222 }
2223 strlcpy(osb->osb_cluster_name,
2224 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2225 OCFS2_CLUSTER_NAME_LEN + 1);
2226 } else {
2227 /* The empty string is identical with classic tools that
2228 * don't know about s_cluster_info. */
2229 osb->osb_cluster_stack[0] = '\0';
2230 }
2231
2232 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2233
2234 /* FIXME
2235 * This should be done in ocfs2_journal_init(), but unknown
2236 * ordering issues will cause the filesystem to crash.
2237 * If anyone wants to figure out what part of the code
2238 * refers to osb->journal before ocfs2_journal_init() is run,
2239 * be my guest.
2240 */
2241 /* initialize our journal structure */
2242
2243 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2244 if (!journal) {
2245 mlog(ML_ERROR, "unable to alloc journal\n");
2246 status = -ENOMEM;
2247 goto bail;
2248 }
2249 osb->journal = journal;
2250 journal->j_osb = osb;
2251
2252 atomic_set(&journal->j_num_trans, 0);
2253 init_rwsem(&journal->j_trans_barrier);
2254 init_waitqueue_head(&journal->j_checkpointed);
2255 spin_lock_init(&journal->j_lock);
2256 journal->j_trans_id = (unsigned long) 1;
2257 INIT_LIST_HEAD(&journal->j_la_cleanups);
2258 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2259 journal->j_state = OCFS2_JOURNAL_FREE;
2260
2261 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2262 init_llist_head(&osb->dquot_drop_list);
2263
2264 /* get some pseudo constants for clustersize bits */
2265 osb->s_clustersize_bits =
2266 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2267 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2268
2269 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2270 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2271 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2272 osb->s_clustersize);
2273 status = -EINVAL;
2274 goto bail;
2275 }
2276
2277 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2278 le32_to_cpu(di->i_clusters));
2279
2280 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2281 total_blocks);
2282 if (status) {
2283 mlog(ML_ERROR, "Volume too large "
2284 "to mount safely on this system");
2285 status = -EFBIG;
2286 goto bail;
2287 }
2288
2289 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2290 sizeof(di->id2.i_super.s_uuid))) {
2291 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2292 status = -ENOMEM;
2293 goto bail;
2294 }
2295
2296 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2297 OCFS2_MAX_VOL_LABEL_LEN);
2298 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2299 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2300 osb->first_cluster_group_blkno =
2301 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2302 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2303 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2304 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2305 (unsigned long long)osb->root_blkno,
2306 (unsigned long long)osb->system_dir_blkno,
2307 osb->s_clustersize_bits);
2308
2309 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2310 if (!osb->osb_dlm_debug) {
2311 status = -ENOMEM;
2312 mlog_errno(status);
2313 goto bail;
2314 }
2315
2316 atomic_set(&osb->vol_state, VOLUME_INIT);
2317
2318 /* load root, system_dir, and all global system inodes */
2319 status = ocfs2_init_global_system_inodes(osb);
2320 if (status < 0) {
2321 mlog_errno(status);
2322 goto bail;
2323 }
2324
2325 /*
2326 * global bitmap
2327 */
2328 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2329 OCFS2_INVALID_SLOT);
2330 if (!inode) {
2331 status = -EINVAL;
2332 mlog_errno(status);
2333 goto bail;
2334 }
2335
2336 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2337 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2338 iput(inode);
2339
2340 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2341 osb->s_feature_incompat) * 8;
2342
2343 status = ocfs2_init_slot_info(osb);
2344 if (status < 0) {
2345 mlog_errno(status);
2346 goto bail;
2347 }
2348 cleancache_init_shared_fs(sb);
2349
2350 bail:
2351 return status;
2352 }
2353
2354 /*
2355 * will return: -EAGAIN if it is ok to keep searching for superblocks
2356 * -EINVAL if there is a bad superblock
2357 * 0 on success
2358 */
2359 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2360 struct buffer_head *bh,
2361 u32 blksz,
2362 struct ocfs2_blockcheck_stats *stats)
2363 {
2364 int status = -EAGAIN;
2365
2366 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2367 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2368 /* We have to do a raw check of the feature here */
2369 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2370 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2371 status = ocfs2_block_check_validate(bh->b_data,
2372 bh->b_size,
2373 &di->i_check,
2374 stats);
2375 if (status)
2376 goto out;
2377 }
2378 status = -EINVAL;
2379 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2380 mlog(ML_ERROR, "found superblock with incorrect block "
2381 "size: found %u, should be %u\n",
2382 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2383 blksz);
2384 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2385 OCFS2_MAJOR_REV_LEVEL ||
2386 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2387 OCFS2_MINOR_REV_LEVEL) {
2388 mlog(ML_ERROR, "found superblock with bad version: "
2389 "found %u.%u, should be %u.%u\n",
2390 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2391 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2392 OCFS2_MAJOR_REV_LEVEL,
2393 OCFS2_MINOR_REV_LEVEL);
2394 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2395 mlog(ML_ERROR, "bad block number on superblock: "
2396 "found %llu, should be %llu\n",
2397 (unsigned long long)le64_to_cpu(di->i_blkno),
2398 (unsigned long long)bh->b_blocknr);
2399 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2400 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2401 mlog(ML_ERROR, "bad cluster size found: %u\n",
2402 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2403 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2404 mlog(ML_ERROR, "bad root_blkno: 0\n");
2405 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2406 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2407 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2408 mlog(ML_ERROR,
2409 "Superblock slots found greater than file system "
2410 "maximum: found %u, max %u\n",
2411 le16_to_cpu(di->id2.i_super.s_max_slots),
2412 OCFS2_MAX_SLOTS);
2413 } else {
2414 /* found it! */
2415 status = 0;
2416 }
2417 }
2418
2419 out:
2420 if (status && status != -EAGAIN)
2421 mlog_errno(status);
2422 return status;
2423 }
2424
2425 static int ocfs2_check_volume(struct ocfs2_super *osb)
2426 {
2427 int status;
2428 int dirty;
2429 int local;
2430 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2431 * recover
2432 * ourselves. */
2433
2434 /* Init our journal object. */
2435 status = ocfs2_journal_init(osb->journal, &dirty);
2436 if (status < 0) {
2437 mlog(ML_ERROR, "Could not initialize journal!\n");
2438 goto finally;
2439 }
2440
2441 /* Now that journal has been initialized, check to make sure
2442 entire volume is addressable. */
2443 status = ocfs2_journal_addressable(osb);
2444 if (status)
2445 goto finally;
2446
2447 /* If the journal was unmounted cleanly then we don't want to
2448 * recover anything. Otherwise, journal_load will do that
2449 * dirty work for us :) */
2450 if (!dirty) {
2451 status = ocfs2_journal_wipe(osb->journal, 0);
2452 if (status < 0) {
2453 mlog_errno(status);
2454 goto finally;
2455 }
2456 } else {
2457 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2458 "unmounted cleanly, recovering it.\n", osb->dev_str);
2459 }
2460
2461 local = ocfs2_mount_local(osb);
2462
2463 /* will play back anything left in the journal. */
2464 status = ocfs2_journal_load(osb->journal, local, dirty);
2465 if (status < 0) {
2466 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2467 goto finally;
2468 }
2469
2470 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2471 jbd2_journal_set_features(osb->journal->j_journal,
2472 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2473 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2474 else
2475 jbd2_journal_clear_features(osb->journal->j_journal,
2476 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2477 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2478
2479 if (dirty) {
2480 /* recover my local alloc if we didn't unmount cleanly. */
2481 status = ocfs2_begin_local_alloc_recovery(osb,
2482 osb->slot_num,
2483 &local_alloc);
2484 if (status < 0) {
2485 mlog_errno(status);
2486 goto finally;
2487 }
2488 /* we complete the recovery process after we've marked
2489 * ourselves as mounted. */
2490 }
2491
2492 status = ocfs2_load_local_alloc(osb);
2493 if (status < 0) {
2494 mlog_errno(status);
2495 goto finally;
2496 }
2497
2498 if (dirty) {
2499 /* Recovery will be completed after we've mounted the
2500 * rest of the volume. */
2501 osb->dirty = 1;
2502 osb->local_alloc_copy = local_alloc;
2503 local_alloc = NULL;
2504 }
2505
2506 /* go through each journal, trylock it and if you get the
2507 * lock, and it's marked as dirty, set the bit in the recover
2508 * map and launch a recovery thread for it. */
2509 status = ocfs2_mark_dead_nodes(osb);
2510 if (status < 0) {
2511 mlog_errno(status);
2512 goto finally;
2513 }
2514
2515 status = ocfs2_compute_replay_slots(osb);
2516 if (status < 0)
2517 mlog_errno(status);
2518
2519 finally:
2520 kfree(local_alloc);
2521
2522 if (status)
2523 mlog_errno(status);
2524 return status;
2525 }
2526
2527 /*
2528 * The routine gets called from dismount or close whenever a dismount on
2529 * volume is requested and the osb open count becomes 1.
2530 * It will remove the osb from the global list and also free up all the
2531 * initialized resources and fileobject.
2532 */
2533 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2534 {
2535 /* This function assumes that the caller has the main osb resource */
2536
2537 ocfs2_free_slot_info(osb);
2538
2539 kfree(osb->osb_orphan_wipes);
2540 kfree(osb->slot_recovery_generations);
2541 /* FIXME
2542 * This belongs in journal shutdown, but because we have to
2543 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2544 * we free it here.
2545 */
2546 kfree(osb->journal);
2547 kfree(osb->local_alloc_copy);
2548 kfree(osb->uuid_str);
2549 kfree(osb->vol_label);
2550 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2551 memset(osb, 0, sizeof(struct ocfs2_super));
2552 }
2553
2554 /* Depending on the mount option passed, perform one of the following:
2555 * Put OCFS2 into a readonly state (default)
2556 * Return EIO so that only the process errs
2557 * Fix the error as if fsck.ocfs2 -y
2558 * panic
2559 */
2560 static int ocfs2_handle_error(struct super_block *sb)
2561 {
2562 struct ocfs2_super *osb = OCFS2_SB(sb);
2563 int rv = 0;
2564
2565 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2566 pr_crit("On-disk corruption discovered. "
2567 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2568
2569 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2570 panic("OCFS2: (device %s): panic forced after error\n",
2571 sb->s_id);
2572 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2573 pr_crit("OCFS2: Returning error to the calling process.\n");
2574 rv = -EIO;
2575 } else { /* default option */
2576 rv = -EROFS;
2577 if (sb->s_flags & MS_RDONLY &&
2578 (ocfs2_is_soft_readonly(osb) ||
2579 ocfs2_is_hard_readonly(osb)))
2580 return rv;
2581
2582 pr_crit("OCFS2: File system is now read-only.\n");
2583 sb->s_flags |= MS_RDONLY;
2584 ocfs2_set_ro_flag(osb, 0);
2585 }
2586
2587 return rv;
2588 }
2589
2590 int __ocfs2_error(struct super_block *sb, const char *function,
2591 const char *fmt, ...)
2592 {
2593 struct va_format vaf;
2594 va_list args;
2595
2596 va_start(args, fmt);
2597 vaf.fmt = fmt;
2598 vaf.va = &args;
2599
2600 /* Not using mlog here because we want to show the actual
2601 * function the error came from. */
2602 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2603 sb->s_id, function, &vaf);
2604
2605 va_end(args);
2606
2607 return ocfs2_handle_error(sb);
2608 }
2609
2610 /* Handle critical errors. This is intentionally more drastic than
2611 * ocfs2_handle_error, so we only use for things like journal errors,
2612 * etc. */
2613 void __ocfs2_abort(struct super_block *sb, const char *function,
2614 const char *fmt, ...)
2615 {
2616 struct va_format vaf;
2617 va_list args;
2618
2619 va_start(args, fmt);
2620
2621 vaf.fmt = fmt;
2622 vaf.va = &args;
2623
2624 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2625 sb->s_id, function, &vaf);
2626
2627 va_end(args);
2628
2629 /* We don't have the cluster support yet to go straight to
2630 * hard readonly in here. Until then, we want to keep
2631 * ocfs2_abort() so that we can at least mark critical
2632 * errors.
2633 *
2634 * TODO: This should abort the journal and alert other nodes
2635 * that our slot needs recovery. */
2636
2637 /* Force a panic(). This stinks, but it's better than letting
2638 * things continue without having a proper hard readonly
2639 * here. */
2640 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2641 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2642 ocfs2_handle_error(sb);
2643 }
2644
2645 /*
2646 * Void signal blockers, because in-kernel sigprocmask() only fails
2647 * when SIG_* is wrong.
2648 */
2649 void ocfs2_block_signals(sigset_t *oldset)
2650 {
2651 int rc;
2652 sigset_t blocked;
2653
2654 sigfillset(&blocked);
2655 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2656 BUG_ON(rc);
2657 }
2658
2659 void ocfs2_unblock_signals(sigset_t *oldset)
2660 {
2661 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2662 BUG_ON(rc);
2663 }
2664
2665 module_init(ocfs2_init);
2666 module_exit(ocfs2_exit);
Linux with added FPC-III support