?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ux500: rework device registration
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / super.c
blobcfeab7ce36974b6d448e7e0b7d96fd0a992dbaa5
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/init.h>
32 #include <linux/random.h>
33 #include <linux/statfs.h>
34 #include <linux/moduleparam.h>
35 #include <linux/blkdev.h>
36 #include <linux/socket.h>
37 #include <linux/inet.h>
38 #include <linux/parser.h>
39 #include <linux/crc32.h>
40 #include <linux/debugfs.h>
41 #include <linux/mount.h>
42 #include <linux/seq_file.h>
43 #include <linux/quotaops.h>
44
45 #define MLOG_MASK_PREFIX ML_SUPER
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 /* this should be the only file to include a version 1 header */
51 #include "ocfs1_fs_compat.h"
52
53 #include "alloc.h"
54 #include "blockcheck.h"
55 #include "dlmglue.h"
56 #include "export.h"
57 #include "extent_map.h"
58 #include "heartbeat.h"
59 #include "inode.h"
60 #include "journal.h"
61 #include "localalloc.h"
62 #include "namei.h"
63 #include "slot_map.h"
64 #include "super.h"
65 #include "sysfile.h"
66 #include "uptodate.h"
67 #include "ver.h"
68 #include "xattr.h"
69 #include "quota.h"
70 #include "refcounttree.h"
71 #include "suballoc.h"
72
73 #include "buffer_head_io.h"
74
75 static struct kmem_cache *ocfs2_inode_cachep = NULL;
76 struct kmem_cache *ocfs2_dquot_cachep;
77 struct kmem_cache *ocfs2_qf_chunk_cachep;
78
79 /* OCFS2 needs to schedule several differnt types of work which
80 * require cluster locking, disk I/O, recovery waits, etc. Since these
81 * types of work tend to be heavy we avoid using the kernel events
82 * workqueue and schedule on our own. */
83 struct workqueue_struct *ocfs2_wq = NULL;
84
85 static struct dentry *ocfs2_debugfs_root = NULL;
86
87 MODULE_AUTHOR("Oracle");
88 MODULE_LICENSE("GPL");
89
90 struct mount_options
91 {
92 unsigned long commit_interval;
93 unsigned long mount_opt;
94 unsigned int atime_quantum;
95 signed short slot;
96 int localalloc_opt;
97 unsigned int resv_level;
98 int dir_resv_level;
99 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
100 };
101
102 static int ocfs2_parse_options(struct super_block *sb, char *options,
103 struct mount_options *mopt,
104 int is_remount);
105 static int ocfs2_check_set_options(struct super_block *sb,
106 struct mount_options *options);
107 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
108 static void ocfs2_put_super(struct super_block *sb);
109 static int ocfs2_mount_volume(struct super_block *sb);
110 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
111 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
112 static int ocfs2_initialize_mem_caches(void);
113 static void ocfs2_free_mem_caches(void);
114 static void ocfs2_delete_osb(struct ocfs2_super *osb);
115
116 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
117
118 static int ocfs2_sync_fs(struct super_block *sb, int wait);
119
120 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
121 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
122 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
123 static int ocfs2_check_volume(struct ocfs2_super *osb);
124 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
125 struct buffer_head *bh,
126 u32 sectsize,
127 struct ocfs2_blockcheck_stats *stats);
128 static int ocfs2_initialize_super(struct super_block *sb,
129 struct buffer_head *bh,
130 int sector_size,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_get_sector(struct super_block *sb,
133 struct buffer_head **bh,
134 int block,
135 int sect_size);
136 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
137 static void ocfs2_destroy_inode(struct inode *inode);
138 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
139 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
140 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
141
142 static const struct super_operations ocfs2_sops = {
143 .statfs = ocfs2_statfs,
144 .alloc_inode = ocfs2_alloc_inode,
145 .destroy_inode = ocfs2_destroy_inode,
146 .drop_inode = ocfs2_drop_inode,
147 .evict_inode = ocfs2_evict_inode,
148 .sync_fs = ocfs2_sync_fs,
149 .put_super = ocfs2_put_super,
150 .remount_fs = ocfs2_remount,
151 .show_options = ocfs2_show_options,
152 .quota_read = ocfs2_quota_read,
153 .quota_write = ocfs2_quota_write,
154 };
155
156 enum {
157 Opt_barrier,
158 Opt_err_panic,
159 Opt_err_ro,
160 Opt_intr,
161 Opt_nointr,
162 Opt_hb_none,
163 Opt_hb_local,
164 Opt_hb_global,
165 Opt_data_ordered,
166 Opt_data_writeback,
167 Opt_atime_quantum,
168 Opt_slot,
169 Opt_commit,
170 Opt_localalloc,
171 Opt_localflocks,
172 Opt_stack,
173 Opt_user_xattr,
174 Opt_nouser_xattr,
175 Opt_inode64,
176 Opt_acl,
177 Opt_noacl,
178 Opt_usrquota,
179 Opt_grpquota,
180 Opt_coherency_buffered,
181 Opt_coherency_full,
182 Opt_resv_level,
183 Opt_dir_resv_level,
184 Opt_err,
185 };
186
187 static const match_table_t tokens = {
188 {Opt_barrier, "barrier=%u"},
189 {Opt_err_panic, "errors=panic"},
190 {Opt_err_ro, "errors=remount-ro"},
191 {Opt_intr, "intr"},
192 {Opt_nointr, "nointr"},
193 {Opt_hb_none, OCFS2_HB_NONE},
194 {Opt_hb_local, OCFS2_HB_LOCAL},
195 {Opt_hb_global, OCFS2_HB_GLOBAL},
196 {Opt_data_ordered, "data=ordered"},
197 {Opt_data_writeback, "data=writeback"},
198 {Opt_atime_quantum, "atime_quantum=%u"},
199 {Opt_slot, "preferred_slot=%u"},
200 {Opt_commit, "commit=%u"},
201 {Opt_localalloc, "localalloc=%d"},
202 {Opt_localflocks, "localflocks"},
203 {Opt_stack, "cluster_stack=%s"},
204 {Opt_user_xattr, "user_xattr"},
205 {Opt_nouser_xattr, "nouser_xattr"},
206 {Opt_inode64, "inode64"},
207 {Opt_acl, "acl"},
208 {Opt_noacl, "noacl"},
209 {Opt_usrquota, "usrquota"},
210 {Opt_grpquota, "grpquota"},
211 {Opt_coherency_buffered, "coherency=buffered"},
212 {Opt_coherency_full, "coherency=full"},
213 {Opt_resv_level, "resv_level=%u"},
214 {Opt_dir_resv_level, "dir_resv_level=%u"},
215 {Opt_err, NULL}
216 };
217
218 #ifdef CONFIG_DEBUG_FS
219 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
220 {
221 struct ocfs2_cluster_connection *cconn = osb->cconn;
222 struct ocfs2_recovery_map *rm = osb->recovery_map;
223 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
224 int i, out = 0;
225
226 out += snprintf(buf + out, len - out,
227 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
228 "Device", osb->dev_str, osb->uuid_str,
229 osb->fs_generation, osb->vol_label);
230
231 out += snprintf(buf + out, len - out,
232 "%10s => State: %d Flags: 0x%lX\n", "Volume",
233 atomic_read(&osb->vol_state), osb->osb_flags);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => Block: %lu Cluster: %d\n", "Sizes",
237 osb->sb->s_blocksize, osb->s_clustersize);
238
239 out += snprintf(buf + out, len - out,
240 "%10s => Compat: 0x%X Incompat: 0x%X "
241 "ROcompat: 0x%X\n",
242 "Features", osb->s_feature_compat,
243 osb->s_feature_incompat, osb->s_feature_ro_compat);
244
245 out += snprintf(buf + out, len - out,
246 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
247 osb->s_mount_opt, osb->s_atime_quantum);
248
249 if (cconn) {
250 out += snprintf(buf + out, len - out,
251 "%10s => Stack: %s Name: %*s "
252 "Version: %d.%d\n", "Cluster",
253 (*osb->osb_cluster_stack == '\0' ?
254 "o2cb" : osb->osb_cluster_stack),
255 cconn->cc_namelen, cconn->cc_name,
256 cconn->cc_version.pv_major,
257 cconn->cc_version.pv_minor);
258 }
259
260 spin_lock(&osb->dc_task_lock);
261 out += snprintf(buf + out, len - out,
262 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
263 "WorkSeq: %lu\n", "DownCnvt",
264 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
265 osb->blocked_lock_count, osb->dc_wake_sequence,
266 osb->dc_work_sequence);
267 spin_unlock(&osb->dc_task_lock);
268
269 spin_lock(&osb->osb_lock);
270 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
271 "Recovery",
272 (osb->recovery_thread_task ?
273 task_pid_nr(osb->recovery_thread_task) : -1));
274 if (rm->rm_used == 0)
275 out += snprintf(buf + out, len - out, " None\n");
276 else {
277 for (i = 0; i < rm->rm_used; i++)
278 out += snprintf(buf + out, len - out, " %d",
279 rm->rm_entries[i]);
280 out += snprintf(buf + out, len - out, "\n");
281 }
282 spin_unlock(&osb->osb_lock);
283
284 out += snprintf(buf + out, len - out,
285 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
286 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
287 osb->osb_commit_interval,
288 atomic_read(&osb->needs_checkpoint));
289
290 out += snprintf(buf + out, len - out,
291 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
292 "Journal", osb->journal->j_state,
293 osb->journal->j_trans_id,
294 atomic_read(&osb->journal->j_num_trans));
295
296 out += snprintf(buf + out, len - out,
297 "%10s => GlobalAllocs: %d LocalAllocs: %d "
298 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
299 "Stats",
300 atomic_read(&osb->alloc_stats.bitmap_data),
301 atomic_read(&osb->alloc_stats.local_data),
302 atomic_read(&osb->alloc_stats.bg_allocs),
303 atomic_read(&osb->alloc_stats.moves),
304 atomic_read(&osb->alloc_stats.bg_extends));
305
306 out += snprintf(buf + out, len - out,
307 "%10s => State: %u Descriptor: %llu Size: %u bits "
308 "Default: %u bits\n",
309 "LocalAlloc", osb->local_alloc_state,
310 (unsigned long long)osb->la_last_gd,
311 osb->local_alloc_bits, osb->local_alloc_default_bits);
312
313 spin_lock(&osb->osb_lock);
314 out += snprintf(buf + out, len - out,
315 "%10s => InodeSlot: %d StolenInodes: %d, "
316 "MetaSlot: %d StolenMeta: %d\n", "Steal",
317 osb->s_inode_steal_slot,
318 atomic_read(&osb->s_num_inodes_stolen),
319 osb->s_meta_steal_slot,
320 atomic_read(&osb->s_num_meta_stolen));
321 spin_unlock(&osb->osb_lock);
322
323 out += snprintf(buf + out, len - out, "OrphanScan => ");
324 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
325 os->os_count, os->os_seqno);
326 out += snprintf(buf + out, len - out, " Last Scan: ");
327 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
328 out += snprintf(buf + out, len - out, "Disabled\n");
329 else
330 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
331 (get_seconds() - os->os_scantime.tv_sec));
332
333 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
334 "Slots", "Num", "RecoGen");
335 for (i = 0; i < osb->max_slots; ++i) {
336 out += snprintf(buf + out, len - out,
337 "%10s %c %3d %10d\n",
338 " ",
339 (i == osb->slot_num ? '*' : ' '),
340 i, osb->slot_recovery_generations[i]);
341 }
342
343 return out;
344 }
345
346 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
347 {
348 struct ocfs2_super *osb = inode->i_private;
349 char *buf = NULL;
350
351 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
352 if (!buf)
353 goto bail;
354
355 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
356
357 file->private_data = buf;
358
359 return 0;
360 bail:
361 return -ENOMEM;
362 }
363
364 static int ocfs2_debug_release(struct inode *inode, struct file *file)
365 {
366 kfree(file->private_data);
367 return 0;
368 }
369
370 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
371 size_t nbytes, loff_t *ppos)
372 {
373 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
374 i_size_read(file->f_mapping->host));
375 }
376 #else
377 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
378 {
379 return 0;
380 }
381 static int ocfs2_debug_release(struct inode *inode, struct file *file)
382 {
383 return 0;
384 }
385 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
386 size_t nbytes, loff_t *ppos)
387 {
388 return 0;
389 }
390 #endif /* CONFIG_DEBUG_FS */
391
392 static const struct file_operations ocfs2_osb_debug_fops = {
393 .open = ocfs2_osb_debug_open,
394 .release = ocfs2_debug_release,
395 .read = ocfs2_debug_read,
396 .llseek = generic_file_llseek,
397 };
398
399 static int ocfs2_sync_fs(struct super_block *sb, int wait)
400 {
401 int status;
402 tid_t target;
403 struct ocfs2_super *osb = OCFS2_SB(sb);
404
405 if (ocfs2_is_hard_readonly(osb))
406 return -EROFS;
407
408 if (wait) {
409 status = ocfs2_flush_truncate_log(osb);
410 if (status < 0)
411 mlog_errno(status);
412 } else {
413 ocfs2_schedule_truncate_log_flush(osb, 0);
414 }
415
416 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
417 &target)) {
418 if (wait)
419 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
420 target);
421 }
422 return 0;
423 }
424
425 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
426 {
427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
428 && (ino == USER_QUOTA_SYSTEM_INODE
429 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
430 return 0;
431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
432 && (ino == GROUP_QUOTA_SYSTEM_INODE
433 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
434 return 0;
435 return 1;
436 }
437
438 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
439 {
440 struct inode *new = NULL;
441 int status = 0;
442 int i;
443
444 mlog_entry_void();
445
446 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
447 if (IS_ERR(new)) {
448 status = PTR_ERR(new);
449 mlog_errno(status);
450 goto bail;
451 }
452 osb->root_inode = new;
453
454 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
455 if (IS_ERR(new)) {
456 status = PTR_ERR(new);
457 mlog_errno(status);
458 goto bail;
459 }
460 osb->sys_root_inode = new;
461
462 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
463 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
464 if (!ocfs2_need_system_inode(osb, i))
465 continue;
466 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
467 if (!new) {
468 ocfs2_release_system_inodes(osb);
469 status = -EINVAL;
470 mlog_errno(status);
471 /* FIXME: Should ERROR_RO_FS */
472 mlog(ML_ERROR, "Unable to load system inode %d, "
473 "possibly corrupt fs?", i);
474 goto bail;
475 }
476 // the array now has one ref, so drop this one
477 iput(new);
478 }
479
480 bail:
481 mlog_exit(status);
482 return status;
483 }
484
485 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
486 {
487 struct inode *new = NULL;
488 int status = 0;
489 int i;
490
491 mlog_entry_void();
492
493 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
494 i < NUM_SYSTEM_INODES;
495 i++) {
496 if (!ocfs2_need_system_inode(osb, i))
497 continue;
498 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
499 if (!new) {
500 ocfs2_release_system_inodes(osb);
501 status = -EINVAL;
502 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
503 status, i, osb->slot_num);
504 goto bail;
505 }
506 /* the array now has one ref, so drop this one */
507 iput(new);
508 }
509
510 bail:
511 mlog_exit(status);
512 return status;
513 }
514
515 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
516 {
517 int i;
518 struct inode *inode;
519
520 mlog_entry_void();
521
522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
523 inode = osb->global_system_inodes[i];
524 if (inode) {
525 iput(inode);
526 osb->global_system_inodes[i] = NULL;
527 }
528 }
529
530 inode = osb->sys_root_inode;
531 if (inode) {
532 iput(inode);
533 osb->sys_root_inode = NULL;
534 }
535
536 inode = osb->root_inode;
537 if (inode) {
538 iput(inode);
539 osb->root_inode = NULL;
540 }
541
542 if (!osb->local_system_inodes)
543 goto out;
544
545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
546 if (osb->local_system_inodes[i]) {
547 iput(osb->local_system_inodes[i]);
548 osb->local_system_inodes[i] = NULL;
549 }
550 }
551
552 kfree(osb->local_system_inodes);
553 osb->local_system_inodes = NULL;
554
555 out:
556 mlog_exit(0);
557 }
558
559 /* We're allocating fs objects, use GFP_NOFS */
560 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
561 {
562 struct ocfs2_inode_info *oi;
563
564 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
565 if (!oi)
566 return NULL;
567
568 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
569 return &oi->vfs_inode;
570 }
571
572 static void ocfs2_destroy_inode(struct inode *inode)
573 {
574 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
575 }
576
577 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
578 unsigned int cbits)
579 {
580 unsigned int bytes = 1 << cbits;
581 unsigned int trim = bytes;
582 unsigned int bitshift = 32;
583
584 /*
585 * i_size and all block offsets in ocfs2 are always 64 bits
586 * wide. i_clusters is 32 bits, in cluster-sized units. So on
587 * 64 bit platforms, cluster size will be the limiting factor.
588 */
589
590 #if BITS_PER_LONG == 32
591 # if defined(CONFIG_LBDAF)
592 BUILD_BUG_ON(sizeof(sector_t) != 8);
593 /*
594 * We might be limited by page cache size.
595 */
596 if (bytes > PAGE_CACHE_SIZE) {
597 bytes = PAGE_CACHE_SIZE;
598 trim = 1;
599 /*
600 * Shift by 31 here so that we don't get larger than
601 * MAX_LFS_FILESIZE
602 */
603 bitshift = 31;
604 }
605 # else
606 /*
607 * We are limited by the size of sector_t. Use block size, as
608 * that's what we expose to the VFS.
609 */
610 bytes = 1 << bbits;
611 trim = 1;
612 bitshift = 31;
613 # endif
614 #endif
615
616 /*
617 * Trim by a whole cluster when we can actually approach the
618 * on-disk limits. Otherwise we can overflow i_clusters when
619 * an extent start is at the max offset.
620 */
621 return (((unsigned long long)bytes) << bitshift) - trim;
622 }
623
624 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
625 {
626 int incompat_features;
627 int ret = 0;
628 struct mount_options parsed_options;
629 struct ocfs2_super *osb = OCFS2_SB(sb);
630 u32 tmp;
631
632 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
633 !ocfs2_check_set_options(sb, &parsed_options)) {
634 ret = -EINVAL;
635 goto out;
636 }
637
638 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
639 OCFS2_MOUNT_HB_NONE;
640 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
641 ret = -EINVAL;
642 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
643 goto out;
644 }
645
646 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
647 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
648 ret = -EINVAL;
649 mlog(ML_ERROR, "Cannot change data mode on remount\n");
650 goto out;
651 }
652
653 /* Probably don't want this on remount; it might
654 * mess with other nodes */
655 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
656 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
657 ret = -EINVAL;
658 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
659 goto out;
660 }
661
662 /* We're going to/from readonly mode. */
663 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
664 /* Disable quota accounting before remounting RO */
665 if (*flags & MS_RDONLY) {
666 ret = ocfs2_susp_quotas(osb, 0);
667 if (ret < 0)
668 goto out;
669 }
670 /* Lock here so the check of HARD_RO and the potential
671 * setting of SOFT_RO is atomic. */
672 spin_lock(&osb->osb_lock);
673 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
674 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
675 ret = -EROFS;
676 goto unlock_osb;
677 }
678
679 if (*flags & MS_RDONLY) {
680 mlog(0, "Going to ro mode.\n");
681 sb->s_flags |= MS_RDONLY;
682 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
683 } else {
684 mlog(0, "Making ro filesystem writeable.\n");
685
686 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
687 mlog(ML_ERROR, "Cannot remount RDWR "
688 "filesystem due to previous errors.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
693 if (incompat_features) {
694 mlog(ML_ERROR, "Cannot remount RDWR because "
695 "of unsupported optional features "
696 "(%x).\n", incompat_features);
697 ret = -EINVAL;
698 goto unlock_osb;
699 }
700 sb->s_flags &= ~MS_RDONLY;
701 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
702 }
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 char *path)
991 {
992 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
993 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
994
995 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
996 return -EINVAL;
997
998 return dquot_enable(sb_dqopt(sb)->files[type], type,
999 format_id, DQUOT_LIMITS_ENABLED);
1000 }
1001
1002 /* Handle quota off quotactl */
1003 static int ocfs2_quota_off(struct super_block *sb, int type)
1004 {
1005 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1006 }
1007
1008 static const struct quotactl_ops ocfs2_quotactl_ops = {
1009 .quota_on = ocfs2_quota_on,
1010 .quota_off = ocfs2_quota_off,
1011 .quota_sync = dquot_quota_sync,
1012 .get_info = dquot_get_dqinfo,
1013 .set_info = dquot_set_dqinfo,
1014 .get_dqblk = dquot_get_dqblk,
1015 .set_dqblk = dquot_set_dqblk,
1016 };
1017
1018 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1019 {
1020 struct dentry *root;
1021 int status, sector_size;
1022 struct mount_options parsed_options;
1023 struct inode *inode = NULL;
1024 struct ocfs2_super *osb = NULL;
1025 struct buffer_head *bh = NULL;
1026 char nodestr[8];
1027 struct ocfs2_blockcheck_stats stats;
1028
1029 mlog_entry("%p, %p, %i", sb, data, silent);
1030
1031 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1032 status = -EINVAL;
1033 goto read_super_error;
1034 }
1035
1036 /* probe for superblock */
1037 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1038 if (status < 0) {
1039 mlog(ML_ERROR, "superblock probe failed!\n");
1040 goto read_super_error;
1041 }
1042
1043 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1044 osb = OCFS2_SB(sb);
1045 if (status < 0) {
1046 mlog_errno(status);
1047 goto read_super_error;
1048 }
1049 brelse(bh);
1050 bh = NULL;
1051
1052 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1053 status = -EINVAL;
1054 goto read_super_error;
1055 }
1056 osb->s_mount_opt = parsed_options.mount_opt;
1057 osb->s_atime_quantum = parsed_options.atime_quantum;
1058 osb->preferred_slot = parsed_options.slot;
1059 osb->osb_commit_interval = parsed_options.commit_interval;
1060
1061 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1062 osb->osb_resv_level = parsed_options.resv_level;
1063 osb->osb_dir_resv_level = parsed_options.resv_level;
1064 if (parsed_options.dir_resv_level == -1)
1065 osb->osb_dir_resv_level = parsed_options.resv_level;
1066 else
1067 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1068
1069 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1070 if (status)
1071 goto read_super_error;
1072
1073 sb->s_magic = OCFS2_SUPER_MAGIC;
1074
1075 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1076 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1077
1078 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1079 * heartbeat=none */
1080 if (bdev_read_only(sb->s_bdev)) {
1081 if (!(sb->s_flags & MS_RDONLY)) {
1082 status = -EACCES;
1083 mlog(ML_ERROR, "Readonly device detected but readonly "
1084 "mount was not specified.\n");
1085 goto read_super_error;
1086 }
1087
1088 /* You should not be able to start a local heartbeat
1089 * on a readonly device. */
1090 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1091 status = -EROFS;
1092 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1093 "device.\n");
1094 goto read_super_error;
1095 }
1096
1097 status = ocfs2_check_journals_nolocks(osb);
1098 if (status < 0) {
1099 if (status == -EROFS)
1100 mlog(ML_ERROR, "Recovery required on readonly "
1101 "file system, but write access is "
1102 "unavailable.\n");
1103 else
1104 mlog_errno(status);
1105 goto read_super_error;
1106 }
1107
1108 ocfs2_set_ro_flag(osb, 1);
1109
1110 printk(KERN_NOTICE "Readonly device detected. No cluster "
1111 "services will be utilized for this mount. Recovery "
1112 "will be skipped.\n");
1113 }
1114
1115 if (!ocfs2_is_hard_readonly(osb)) {
1116 if (sb->s_flags & MS_RDONLY)
1117 ocfs2_set_ro_flag(osb, 0);
1118 }
1119
1120 status = ocfs2_verify_heartbeat(osb);
1121 if (status < 0) {
1122 mlog_errno(status);
1123 goto read_super_error;
1124 }
1125
1126 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1127 ocfs2_debugfs_root);
1128 if (!osb->osb_debug_root) {
1129 status = -EINVAL;
1130 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1131 goto read_super_error;
1132 }
1133
1134 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1135 osb->osb_debug_root,
1136 osb,
1137 &ocfs2_osb_debug_fops);
1138 if (!osb->osb_ctxt) {
1139 status = -EINVAL;
1140 mlog_errno(status);
1141 goto read_super_error;
1142 }
1143
1144 if (ocfs2_meta_ecc(osb)) {
1145 status = ocfs2_blockcheck_stats_debugfs_install(
1146 &osb->osb_ecc_stats,
1147 osb->osb_debug_root);
1148 if (status) {
1149 mlog(ML_ERROR,
1150 "Unable to create blockcheck statistics "
1151 "files\n");
1152 goto read_super_error;
1153 }
1154 }
1155
1156 status = ocfs2_mount_volume(sb);
1157 if (osb->root_inode)
1158 inode = igrab(osb->root_inode);
1159
1160 if (status < 0)
1161 goto read_super_error;
1162
1163 if (!inode) {
1164 status = -EIO;
1165 mlog_errno(status);
1166 goto read_super_error;
1167 }
1168
1169 root = d_alloc_root(inode);
1170 if (!root) {
1171 status = -ENOMEM;
1172 mlog_errno(status);
1173 goto read_super_error;
1174 }
1175
1176 sb->s_root = root;
1177
1178 ocfs2_complete_mount_recovery(osb);
1179
1180 if (ocfs2_mount_local(osb))
1181 snprintf(nodestr, sizeof(nodestr), "local");
1182 else
1183 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1184
1185 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1186 "with %s data mode.\n",
1187 osb->dev_str, nodestr, osb->slot_num,
1188 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1189 "ordered");
1190
1191 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1192 wake_up(&osb->osb_mount_event);
1193
1194 /* Now we can initialize quotas because we can afford to wait
1195 * for cluster locks recovery now. That also means that truncation
1196 * log recovery can happen but that waits for proper quota setup */
1197 if (!(sb->s_flags & MS_RDONLY)) {
1198 status = ocfs2_enable_quotas(osb);
1199 if (status < 0) {
1200 /* We have to err-out specially here because
1201 * s_root is already set */
1202 mlog_errno(status);
1203 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1204 wake_up(&osb->osb_mount_event);
1205 mlog_exit(status);
1206 return status;
1207 }
1208 }
1209
1210 ocfs2_complete_quota_recovery(osb);
1211
1212 /* Now we wake up again for processes waiting for quotas */
1213 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1214 wake_up(&osb->osb_mount_event);
1215
1216 /* Start this when the mount is almost sure of being successful */
1217 ocfs2_orphan_scan_start(osb);
1218
1219 mlog_exit(status);
1220 return status;
1221
1222 read_super_error:
1223 brelse(bh);
1224
1225 if (inode)
1226 iput(inode);
1227
1228 if (osb) {
1229 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1230 wake_up(&osb->osb_mount_event);
1231 ocfs2_dismount_volume(sb, 1);
1232 }
1233
1234 mlog_exit(status);
1235 return status;
1236 }
1237
1238 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1239 int flags,
1240 const char *dev_name,
1241 void *data)
1242 {
1243 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1244 }
1245
1246 static void ocfs2_kill_sb(struct super_block *sb)
1247 {
1248 struct ocfs2_super *osb = OCFS2_SB(sb);
1249
1250 /* Failed mount? */
1251 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1252 goto out;
1253
1254 /* Prevent further queueing of inode drop events */
1255 spin_lock(&dentry_list_lock);
1256 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1257 spin_unlock(&dentry_list_lock);
1258 /* Wait for work to finish and/or remove it */
1259 cancel_work_sync(&osb->dentry_lock_work);
1260 out:
1261 kill_block_super(sb);
1262 }
1263
1264 static struct file_system_type ocfs2_fs_type = {
1265 .owner = THIS_MODULE,
1266 .name = "ocfs2",
1267 .mount = ocfs2_mount,
1268 .kill_sb = ocfs2_kill_sb,
1269
1270 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1271 .next = NULL
1272 };
1273
1274 static int ocfs2_check_set_options(struct super_block *sb,
1275 struct mount_options *options)
1276 {
1277 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1278 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1279 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1280 mlog(ML_ERROR, "User quotas were requested, but this "
1281 "filesystem does not have the feature enabled.\n");
1282 return 0;
1283 }
1284 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1285 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1286 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1287 mlog(ML_ERROR, "Group quotas were requested, but this "
1288 "filesystem does not have the feature enabled.\n");
1289 return 0;
1290 }
1291 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1292 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1293 mlog(ML_ERROR, "ACL support requested but extended attributes "
1294 "feature is not enabled\n");
1295 return 0;
1296 }
1297 /* No ACL setting specified? Use XATTR feature... */
1298 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1299 OCFS2_MOUNT_NO_POSIX_ACL))) {
1300 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1301 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1302 else
1303 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1304 }
1305 return 1;
1306 }
1307
1308 static int ocfs2_parse_options(struct super_block *sb,
1309 char *options,
1310 struct mount_options *mopt,
1311 int is_remount)
1312 {
1313 int status;
1314 char *p;
1315 u32 tmp;
1316
1317 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1318 options ? options : "(none)");
1319
1320 mopt->commit_interval = 0;
1321 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1322 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1323 mopt->slot = OCFS2_INVALID_SLOT;
1324 mopt->localalloc_opt = -1;
1325 mopt->cluster_stack[0] = '\0';
1326 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1327 mopt->dir_resv_level = -1;
1328
1329 if (!options) {
1330 status = 1;
1331 goto bail;
1332 }
1333
1334 while ((p = strsep(&options, ",")) != NULL) {
1335 int token, option;
1336 substring_t args[MAX_OPT_ARGS];
1337
1338 if (!*p)
1339 continue;
1340
1341 token = match_token(p, tokens, args);
1342 switch (token) {
1343 case Opt_hb_local:
1344 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1345 break;
1346 case Opt_hb_none:
1347 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1348 break;
1349 case Opt_hb_global:
1350 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1351 break;
1352 case Opt_barrier:
1353 if (match_int(&args[0], &option)) {
1354 status = 0;
1355 goto bail;
1356 }
1357 if (option)
1358 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1359 else
1360 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1361 break;
1362 case Opt_intr:
1363 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1364 break;
1365 case Opt_nointr:
1366 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1367 break;
1368 case Opt_err_panic:
1369 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1370 break;
1371 case Opt_err_ro:
1372 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1373 break;
1374 case Opt_data_ordered:
1375 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1376 break;
1377 case Opt_data_writeback:
1378 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1379 break;
1380 case Opt_user_xattr:
1381 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1382 break;
1383 case Opt_nouser_xattr:
1384 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1385 break;
1386 case Opt_atime_quantum:
1387 if (match_int(&args[0], &option)) {
1388 status = 0;
1389 goto bail;
1390 }
1391 if (option >= 0)
1392 mopt->atime_quantum = option;
1393 break;
1394 case Opt_slot:
1395 option = 0;
1396 if (match_int(&args[0], &option)) {
1397 status = 0;
1398 goto bail;
1399 }
1400 if (option)
1401 mopt->slot = (s16)option;
1402 break;
1403 case Opt_commit:
1404 option = 0;
1405 if (match_int(&args[0], &option)) {
1406 status = 0;
1407 goto bail;
1408 }
1409 if (option < 0)
1410 return 0;
1411 if (option == 0)
1412 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1413 mopt->commit_interval = HZ * option;
1414 break;
1415 case Opt_localalloc:
1416 option = 0;
1417 if (match_int(&args[0], &option)) {
1418 status = 0;
1419 goto bail;
1420 }
1421 if (option >= 0)
1422 mopt->localalloc_opt = option;
1423 break;
1424 case Opt_localflocks:
1425 /*
1426 * Changing this during remount could race
1427 * flock() requests, or "unbalance" existing
1428 * ones (e.g., a lock is taken in one mode but
1429 * dropped in the other). If users care enough
1430 * to flip locking modes during remount, we
1431 * could add a "local" flag to individual
1432 * flock structures for proper tracking of
1433 * state.
1434 */
1435 if (!is_remount)
1436 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1437 break;
1438 case Opt_stack:
1439 /* Check both that the option we were passed
1440 * is of the right length and that it is a proper
1441 * string of the right length.
1442 */
1443 if (((args[0].to - args[0].from) !=
1444 OCFS2_STACK_LABEL_LEN) ||
1445 (strnlen(args[0].from,
1446 OCFS2_STACK_LABEL_LEN) !=
1447 OCFS2_STACK_LABEL_LEN)) {
1448 mlog(ML_ERROR,
1449 "Invalid cluster_stack option\n");
1450 status = 0;
1451 goto bail;
1452 }
1453 memcpy(mopt->cluster_stack, args[0].from,
1454 OCFS2_STACK_LABEL_LEN);
1455 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1456 break;
1457 case Opt_inode64:
1458 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1459 break;
1460 case Opt_usrquota:
1461 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1462 break;
1463 case Opt_grpquota:
1464 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1465 break;
1466 case Opt_coherency_buffered:
1467 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1468 break;
1469 case Opt_coherency_full:
1470 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1471 break;
1472 case Opt_acl:
1473 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1474 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1475 break;
1476 case Opt_noacl:
1477 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1478 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1479 break;
1480 case Opt_resv_level:
1481 if (is_remount)
1482 break;
1483 if (match_int(&args[0], &option)) {
1484 status = 0;
1485 goto bail;
1486 }
1487 if (option >= OCFS2_MIN_RESV_LEVEL &&
1488 option < OCFS2_MAX_RESV_LEVEL)
1489 mopt->resv_level = option;
1490 break;
1491 case Opt_dir_resv_level:
1492 if (is_remount)
1493 break;
1494 if (match_int(&args[0], &option)) {
1495 status = 0;
1496 goto bail;
1497 }
1498 if (option >= OCFS2_MIN_RESV_LEVEL &&
1499 option < OCFS2_MAX_RESV_LEVEL)
1500 mopt->dir_resv_level = option;
1501 break;
1502 default:
1503 mlog(ML_ERROR,
1504 "Unrecognized mount option \"%s\" "
1505 "or missing value\n", p);
1506 status = 0;
1507 goto bail;
1508 }
1509 }
1510
1511 /* Ensure only one heartbeat mode */
1512 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
1513 OCFS2_MOUNT_HB_NONE);
1514 if (hweight32(tmp) != 1) {
1515 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1516 status = 0;
1517 goto bail;
1518 }
1519
1520 status = 1;
1521
1522 bail:
1523 mlog_exit(status);
1524 return status;
1525 }
1526
1527 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1528 {
1529 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1530 unsigned long opts = osb->s_mount_opt;
1531 unsigned int local_alloc_megs;
1532
1533 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1534 seq_printf(s, ",_netdev");
1535 if (opts & OCFS2_MOUNT_HB_LOCAL)
1536 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1537 else
1538 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1539 } else
1540 seq_printf(s, ",%s", OCFS2_HB_NONE);
1541
1542 if (opts & OCFS2_MOUNT_NOINTR)
1543 seq_printf(s, ",nointr");
1544
1545 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1546 seq_printf(s, ",data=writeback");
1547 else
1548 seq_printf(s, ",data=ordered");
1549
1550 if (opts & OCFS2_MOUNT_BARRIER)
1551 seq_printf(s, ",barrier=1");
1552
1553 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1554 seq_printf(s, ",errors=panic");
1555 else
1556 seq_printf(s, ",errors=remount-ro");
1557
1558 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1559 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1560
1561 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1562 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1563
1564 if (osb->osb_commit_interval)
1565 seq_printf(s, ",commit=%u",
1566 (unsigned) (osb->osb_commit_interval / HZ));
1567
1568 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1569 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1570 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1571
1572 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1573 seq_printf(s, ",localflocks,");
1574
1575 if (osb->osb_cluster_stack[0])
1576 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1577 osb->osb_cluster_stack);
1578 if (opts & OCFS2_MOUNT_USRQUOTA)
1579 seq_printf(s, ",usrquota");
1580 if (opts & OCFS2_MOUNT_GRPQUOTA)
1581 seq_printf(s, ",grpquota");
1582
1583 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1584 seq_printf(s, ",coherency=buffered");
1585 else
1586 seq_printf(s, ",coherency=full");
1587
1588 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1589 seq_printf(s, ",nouser_xattr");
1590 else
1591 seq_printf(s, ",user_xattr");
1592
1593 if (opts & OCFS2_MOUNT_INODE64)
1594 seq_printf(s, ",inode64");
1595
1596 if (opts & OCFS2_MOUNT_POSIX_ACL)
1597 seq_printf(s, ",acl");
1598 else
1599 seq_printf(s, ",noacl");
1600
1601 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1602 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1603
1604 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1605 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1606
1607 return 0;
1608 }
1609
1610 static int __init ocfs2_init(void)
1611 {
1612 int status;
1613
1614 mlog_entry_void();
1615
1616 ocfs2_print_version();
1617
1618 status = init_ocfs2_uptodate_cache();
1619 if (status < 0) {
1620 mlog_errno(status);
1621 goto leave;
1622 }
1623
1624 status = ocfs2_initialize_mem_caches();
1625 if (status < 0) {
1626 mlog_errno(status);
1627 goto leave;
1628 }
1629
1630 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1631 if (!ocfs2_wq) {
1632 status = -ENOMEM;
1633 goto leave;
1634 }
1635
1636 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1637 if (!ocfs2_debugfs_root) {
1638 status = -EFAULT;
1639 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1640 }
1641
1642 status = ocfs2_quota_setup();
1643 if (status)
1644 goto leave;
1645
1646 ocfs2_set_locking_protocol();
1647
1648 status = register_quota_format(&ocfs2_quota_format);
1649 leave:
1650 if (status < 0) {
1651 ocfs2_quota_shutdown();
1652 ocfs2_free_mem_caches();
1653 exit_ocfs2_uptodate_cache();
1654 }
1655
1656 mlog_exit(status);
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 mlog_entry_void();
1667
1668 ocfs2_quota_shutdown();
1669
1670 if (ocfs2_wq) {
1671 flush_workqueue(ocfs2_wq);
1672 destroy_workqueue(ocfs2_wq);
1673 }
1674
1675 unregister_quota_format(&ocfs2_quota_format);
1676
1677 debugfs_remove(ocfs2_debugfs_root);
1678
1679 ocfs2_free_mem_caches();
1680
1681 unregister_filesystem(&ocfs2_fs_type);
1682
1683 exit_ocfs2_uptodate_cache();
1684
1685 mlog_exit_void();
1686 }
1687
1688 static void ocfs2_put_super(struct super_block *sb)
1689 {
1690 mlog_entry("(0x%p)\n", sb);
1691
1692 ocfs2_sync_blockdev(sb);
1693 ocfs2_dismount_volume(sb, 0);
1694
1695 mlog_exit_void();
1696 }
1697
1698 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1699 {
1700 struct ocfs2_super *osb;
1701 u32 numbits, freebits;
1702 int status;
1703 struct ocfs2_dinode *bm_lock;
1704 struct buffer_head *bh = NULL;
1705 struct inode *inode = NULL;
1706
1707 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1708
1709 osb = OCFS2_SB(dentry->d_sb);
1710
1711 inode = ocfs2_get_system_file_inode(osb,
1712 GLOBAL_BITMAP_SYSTEM_INODE,
1713 OCFS2_INVALID_SLOT);
1714 if (!inode) {
1715 mlog(ML_ERROR, "failed to get bitmap inode\n");
1716 status = -EIO;
1717 goto bail;
1718 }
1719
1720 status = ocfs2_inode_lock(inode, &bh, 0);
1721 if (status < 0) {
1722 mlog_errno(status);
1723 goto bail;
1724 }
1725
1726 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1727
1728 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1729 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1730
1731 buf->f_type = OCFS2_SUPER_MAGIC;
1732 buf->f_bsize = dentry->d_sb->s_blocksize;
1733 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1734 buf->f_blocks = ((sector_t) numbits) *
1735 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1736 buf->f_bfree = ((sector_t) freebits) *
1737 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1738 buf->f_bavail = buf->f_bfree;
1739 buf->f_files = numbits;
1740 buf->f_ffree = freebits;
1741 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1742 & 0xFFFFFFFFUL;
1743 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1744 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1745
1746 brelse(bh);
1747
1748 ocfs2_inode_unlock(inode, 0);
1749 status = 0;
1750 bail:
1751 if (inode)
1752 iput(inode);
1753
1754 mlog_exit(status);
1755
1756 return status;
1757 }
1758
1759 static void ocfs2_inode_init_once(void *data)
1760 {
1761 struct ocfs2_inode_info *oi = data;
1762
1763 oi->ip_flags = 0;
1764 oi->ip_open_count = 0;
1765 spin_lock_init(&oi->ip_lock);
1766 ocfs2_extent_map_init(&oi->vfs_inode);
1767 INIT_LIST_HEAD(&oi->ip_io_markers);
1768 oi->ip_dir_start_lookup = 0;
1769
1770 init_rwsem(&oi->ip_alloc_sem);
1771 init_rwsem(&oi->ip_xattr_sem);
1772 mutex_init(&oi->ip_io_mutex);
1773
1774 oi->ip_blkno = 0ULL;
1775 oi->ip_clusters = 0;
1776
1777 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1778
1779 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1780 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1781 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1782
1783 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1784 &ocfs2_inode_caching_ops);
1785
1786 inode_init_once(&oi->vfs_inode);
1787 }
1788
1789 static int ocfs2_initialize_mem_caches(void)
1790 {
1791 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1792 sizeof(struct ocfs2_inode_info),
1793 0,
1794 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1795 SLAB_MEM_SPREAD),
1796 ocfs2_inode_init_once);
1797 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1798 sizeof(struct ocfs2_dquot),
1799 0,
1800 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1801 SLAB_MEM_SPREAD),
1802 NULL);
1803 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1804 sizeof(struct ocfs2_quota_chunk),
1805 0,
1806 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1807 NULL);
1808 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1809 !ocfs2_qf_chunk_cachep) {
1810 if (ocfs2_inode_cachep)
1811 kmem_cache_destroy(ocfs2_inode_cachep);
1812 if (ocfs2_dquot_cachep)
1813 kmem_cache_destroy(ocfs2_dquot_cachep);
1814 if (ocfs2_qf_chunk_cachep)
1815 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1816 return -ENOMEM;
1817 }
1818
1819 return 0;
1820 }
1821
1822 static void ocfs2_free_mem_caches(void)
1823 {
1824 if (ocfs2_inode_cachep)
1825 kmem_cache_destroy(ocfs2_inode_cachep);
1826 ocfs2_inode_cachep = NULL;
1827
1828 if (ocfs2_dquot_cachep)
1829 kmem_cache_destroy(ocfs2_dquot_cachep);
1830 ocfs2_dquot_cachep = NULL;
1831
1832 if (ocfs2_qf_chunk_cachep)
1833 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1834 ocfs2_qf_chunk_cachep = NULL;
1835 }
1836
1837 static int ocfs2_get_sector(struct super_block *sb,
1838 struct buffer_head **bh,
1839 int block,
1840 int sect_size)
1841 {
1842 if (!sb_set_blocksize(sb, sect_size)) {
1843 mlog(ML_ERROR, "unable to set blocksize\n");
1844 return -EIO;
1845 }
1846
1847 *bh = sb_getblk(sb, block);
1848 if (!*bh) {
1849 mlog_errno(-EIO);
1850 return -EIO;
1851 }
1852 lock_buffer(*bh);
1853 if (!buffer_dirty(*bh))
1854 clear_buffer_uptodate(*bh);
1855 unlock_buffer(*bh);
1856 ll_rw_block(READ, 1, bh);
1857 wait_on_buffer(*bh);
1858 if (!buffer_uptodate(*bh)) {
1859 mlog_errno(-EIO);
1860 brelse(*bh);
1861 *bh = NULL;
1862 return -EIO;
1863 }
1864
1865 return 0;
1866 }
1867
1868 static int ocfs2_mount_volume(struct super_block *sb)
1869 {
1870 int status = 0;
1871 int unlock_super = 0;
1872 struct ocfs2_super *osb = OCFS2_SB(sb);
1873
1874 mlog_entry_void();
1875
1876 if (ocfs2_is_hard_readonly(osb))
1877 goto leave;
1878
1879 status = ocfs2_dlm_init(osb);
1880 if (status < 0) {
1881 mlog_errno(status);
1882 goto leave;
1883 }
1884
1885 status = ocfs2_super_lock(osb, 1);
1886 if (status < 0) {
1887 mlog_errno(status);
1888 goto leave;
1889 }
1890 unlock_super = 1;
1891
1892 /* This will load up the node map and add ourselves to it. */
1893 status = ocfs2_find_slot(osb);
1894 if (status < 0) {
1895 mlog_errno(status);
1896 goto leave;
1897 }
1898
1899 /* load all node-local system inodes */
1900 status = ocfs2_init_local_system_inodes(osb);
1901 if (status < 0) {
1902 mlog_errno(status);
1903 goto leave;
1904 }
1905
1906 status = ocfs2_check_volume(osb);
1907 if (status < 0) {
1908 mlog_errno(status);
1909 goto leave;
1910 }
1911
1912 status = ocfs2_truncate_log_init(osb);
1913 if (status < 0)
1914 mlog_errno(status);
1915
1916 leave:
1917 if (unlock_super)
1918 ocfs2_super_unlock(osb, 1);
1919
1920 mlog_exit(status);
1921 return status;
1922 }
1923
1924 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1925 {
1926 int tmp, hangup_needed = 0;
1927 struct ocfs2_super *osb = NULL;
1928 char nodestr[8];
1929
1930 mlog_entry("(0x%p)\n", sb);
1931
1932 BUG_ON(!sb);
1933 osb = OCFS2_SB(sb);
1934 BUG_ON(!osb);
1935
1936 debugfs_remove(osb->osb_ctxt);
1937
1938 /*
1939 * Flush inode dropping work queue so that deletes are
1940 * performed while the filesystem is still working
1941 */
1942 ocfs2_drop_all_dl_inodes(osb);
1943
1944 /* Orphan scan should be stopped as early as possible */
1945 ocfs2_orphan_scan_stop(osb);
1946
1947 ocfs2_disable_quotas(osb);
1948
1949 ocfs2_shutdown_local_alloc(osb);
1950
1951 ocfs2_truncate_log_shutdown(osb);
1952
1953 /* This will disable recovery and flush any recovery work. */
1954 ocfs2_recovery_exit(osb);
1955
1956 ocfs2_journal_shutdown(osb);
1957
1958 ocfs2_sync_blockdev(sb);
1959
1960 ocfs2_purge_refcount_trees(osb);
1961
1962 /* No cluster connection means we've failed during mount, so skip
1963 * all the steps which depended on that to complete. */
1964 if (osb->cconn) {
1965 tmp = ocfs2_super_lock(osb, 1);
1966 if (tmp < 0) {
1967 mlog_errno(tmp);
1968 return;
1969 }
1970 }
1971
1972 if (osb->slot_num != OCFS2_INVALID_SLOT)
1973 ocfs2_put_slot(osb);
1974
1975 if (osb->cconn)
1976 ocfs2_super_unlock(osb, 1);
1977
1978 ocfs2_release_system_inodes(osb);
1979
1980 /*
1981 * If we're dismounting due to mount error, mount.ocfs2 will clean
1982 * up heartbeat. If we're a local mount, there is no heartbeat.
1983 * If we failed before we got a uuid_str yet, we can't stop
1984 * heartbeat. Otherwise, do it.
1985 */
1986 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1987 hangup_needed = 1;
1988
1989 if (osb->cconn)
1990 ocfs2_dlm_shutdown(osb, hangup_needed);
1991
1992 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1993 debugfs_remove(osb->osb_debug_root);
1994
1995 if (hangup_needed)
1996 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1997
1998 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1999
2000 if (ocfs2_mount_local(osb))
2001 snprintf(nodestr, sizeof(nodestr), "local");
2002 else
2003 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2004
2005 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2006 osb->dev_str, nodestr);
2007
2008 ocfs2_delete_osb(osb);
2009 kfree(osb);
2010 sb->s_dev = 0;
2011 sb->s_fs_info = NULL;
2012 }
2013
2014 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2015 unsigned uuid_bytes)
2016 {
2017 int i, ret;
2018 char *ptr;
2019
2020 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2021
2022 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2023 if (osb->uuid_str == NULL)
2024 return -ENOMEM;
2025
2026 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2027 /* print with null */
2028 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2029 if (ret != 2) /* drop super cleans up */
2030 return -EINVAL;
2031 /* then only advance past the last char */
2032 ptr += 2;
2033 }
2034
2035 return 0;
2036 }
2037
2038 /* Make sure entire volume is addressable by our journal. Requires
2039 osb_clusters_at_boot to be valid and for the journal to have been
2040 initialized by ocfs2_journal_init(). */
2041 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2042 {
2043 int status = 0;
2044 u64 max_block =
2045 ocfs2_clusters_to_blocks(osb->sb,
2046 osb->osb_clusters_at_boot) - 1;
2047
2048 /* 32-bit block number is always OK. */
2049 if (max_block <= (u32)~0ULL)
2050 goto out;
2051
2052 /* Volume is "huge", so see if our journal is new enough to
2053 support it. */
2054 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2055 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2056 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2057 JBD2_FEATURE_INCOMPAT_64BIT))) {
2058 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2059 "Enable the 'block64' journal option with tunefs.ocfs2");
2060 status = -EFBIG;
2061 goto out;
2062 }
2063
2064 out:
2065 return status;
2066 }
2067
2068 static int ocfs2_initialize_super(struct super_block *sb,
2069 struct buffer_head *bh,
2070 int sector_size,
2071 struct ocfs2_blockcheck_stats *stats)
2072 {
2073 int status;
2074 int i, cbits, bbits;
2075 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2076 struct inode *inode = NULL;
2077 struct ocfs2_journal *journal;
2078 __le32 uuid_net_key;
2079 struct ocfs2_super *osb;
2080 u64 total_blocks;
2081
2082 mlog_entry_void();
2083
2084 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2085 if (!osb) {
2086 status = -ENOMEM;
2087 mlog_errno(status);
2088 goto bail;
2089 }
2090
2091 sb->s_fs_info = osb;
2092 sb->s_op = &ocfs2_sops;
2093 sb->s_export_op = &ocfs2_export_ops;
2094 sb->s_qcop = &ocfs2_quotactl_ops;
2095 sb->dq_op = &ocfs2_quota_operations;
2096 sb->s_xattr = ocfs2_xattr_handlers;
2097 sb->s_time_gran = 1;
2098 sb->s_flags |= MS_NOATIME;
2099 /* this is needed to support O_LARGEFILE */
2100 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2101 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2102 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2103
2104 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2105
2106 for (i = 0; i < 3; i++)
2107 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2108 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2109
2110 osb->sb = sb;
2111 /* Save off for ocfs2_rw_direct */
2112 osb->s_sectsize_bits = blksize_bits(sector_size);
2113 BUG_ON(!osb->s_sectsize_bits);
2114
2115 spin_lock_init(&osb->dc_task_lock);
2116 init_waitqueue_head(&osb->dc_event);
2117 osb->dc_work_sequence = 0;
2118 osb->dc_wake_sequence = 0;
2119 INIT_LIST_HEAD(&osb->blocked_lock_list);
2120 osb->blocked_lock_count = 0;
2121 spin_lock_init(&osb->osb_lock);
2122 spin_lock_init(&osb->osb_xattr_lock);
2123 ocfs2_init_steal_slots(osb);
2124
2125 atomic_set(&osb->alloc_stats.moves, 0);
2126 atomic_set(&osb->alloc_stats.local_data, 0);
2127 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2128 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2129 atomic_set(&osb->alloc_stats.bg_extends, 0);
2130
2131 /* Copy the blockcheck stats from the superblock probe */
2132 osb->osb_ecc_stats = *stats;
2133
2134 ocfs2_init_node_maps(osb);
2135
2136 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2137 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2138
2139 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2140 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2141 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2142 osb->max_slots);
2143 status = -EINVAL;
2144 goto bail;
2145 }
2146 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2147
2148 ocfs2_orphan_scan_init(osb);
2149
2150 status = ocfs2_recovery_init(osb);
2151 if (status) {
2152 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2153 mlog_errno(status);
2154 goto bail;
2155 }
2156
2157 init_waitqueue_head(&osb->checkpoint_event);
2158 atomic_set(&osb->needs_checkpoint, 0);
2159
2160 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2161
2162 osb->slot_num = OCFS2_INVALID_SLOT;
2163
2164 osb->s_xattr_inline_size = le16_to_cpu(
2165 di->id2.i_super.s_xattr_inline_size);
2166
2167 osb->local_alloc_state = OCFS2_LA_UNUSED;
2168 osb->local_alloc_bh = NULL;
2169 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2170
2171 init_waitqueue_head(&osb->osb_mount_event);
2172
2173 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2174 if (status) {
2175 mlog_errno(status);
2176 goto bail;
2177 }
2178
2179 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2180 if (!osb->vol_label) {
2181 mlog(ML_ERROR, "unable to alloc vol label\n");
2182 status = -ENOMEM;
2183 goto bail;
2184 }
2185
2186 osb->slot_recovery_generations =
2187 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2188 GFP_KERNEL);
2189 if (!osb->slot_recovery_generations) {
2190 status = -ENOMEM;
2191 mlog_errno(status);
2192 goto bail;
2193 }
2194
2195 init_waitqueue_head(&osb->osb_wipe_event);
2196 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2197 sizeof(*osb->osb_orphan_wipes),
2198 GFP_KERNEL);
2199 if (!osb->osb_orphan_wipes) {
2200 status = -ENOMEM;
2201 mlog_errno(status);
2202 goto bail;
2203 }
2204
2205 osb->osb_rf_lock_tree = RB_ROOT;
2206
2207 osb->s_feature_compat =
2208 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2209 osb->s_feature_ro_compat =
2210 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2211 osb->s_feature_incompat =
2212 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2213
2214 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2215 mlog(ML_ERROR, "couldn't mount because of unsupported "
2216 "optional features (%x).\n", i);
2217 status = -EINVAL;
2218 goto bail;
2219 }
2220 if (!(osb->sb->s_flags & MS_RDONLY) &&
2221 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2222 mlog(ML_ERROR, "couldn't mount RDWR because of "
2223 "unsupported optional features (%x).\n", i);
2224 status = -EINVAL;
2225 goto bail;
2226 }
2227
2228 if (ocfs2_clusterinfo_valid(osb)) {
2229 osb->osb_stackflags =
2230 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2231 memcpy(osb->osb_cluster_stack,
2232 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2233 OCFS2_STACK_LABEL_LEN);
2234 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2235 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2236 mlog(ML_ERROR,
2237 "couldn't mount because of an invalid "
2238 "cluster stack label (%s) \n",
2239 osb->osb_cluster_stack);
2240 status = -EINVAL;
2241 goto bail;
2242 }
2243 } else {
2244 /* The empty string is identical with classic tools that
2245 * don't know about s_cluster_info. */
2246 osb->osb_cluster_stack[0] = '\0';
2247 }
2248
2249 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2250
2251 /* FIXME
2252 * This should be done in ocfs2_journal_init(), but unknown
2253 * ordering issues will cause the filesystem to crash.
2254 * If anyone wants to figure out what part of the code
2255 * refers to osb->journal before ocfs2_journal_init() is run,
2256 * be my guest.
2257 */
2258 /* initialize our journal structure */
2259
2260 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2261 if (!journal) {
2262 mlog(ML_ERROR, "unable to alloc journal\n");
2263 status = -ENOMEM;
2264 goto bail;
2265 }
2266 osb->journal = journal;
2267 journal->j_osb = osb;
2268
2269 atomic_set(&journal->j_num_trans, 0);
2270 init_rwsem(&journal->j_trans_barrier);
2271 init_waitqueue_head(&journal->j_checkpointed);
2272 spin_lock_init(&journal->j_lock);
2273 journal->j_trans_id = (unsigned long) 1;
2274 INIT_LIST_HEAD(&journal->j_la_cleanups);
2275 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2276 journal->j_state = OCFS2_JOURNAL_FREE;
2277
2278 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2279 osb->dentry_lock_list = NULL;
2280
2281 /* get some pseudo constants for clustersize bits */
2282 osb->s_clustersize_bits =
2283 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2284 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2285 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2286
2287 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2288 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2289 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2290 osb->s_clustersize);
2291 status = -EINVAL;
2292 goto bail;
2293 }
2294
2295 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2296 le32_to_cpu(di->i_clusters));
2297
2298 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2299 total_blocks);
2300 if (status) {
2301 mlog(ML_ERROR, "Volume too large "
2302 "to mount safely on this system");
2303 status = -EFBIG;
2304 goto bail;
2305 }
2306
2307 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2308 sizeof(di->id2.i_super.s_uuid))) {
2309 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2310 status = -ENOMEM;
2311 goto bail;
2312 }
2313
2314 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2315
2316 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2317 osb->vol_label[63] = '\0';
2318 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2319 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2320 osb->first_cluster_group_blkno =
2321 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2322 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2323 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2324 mlog(0, "vol_label: %s\n", osb->vol_label);
2325 mlog(0, "uuid: %s\n", osb->uuid_str);
2326 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2327 (unsigned long long)osb->root_blkno,
2328 (unsigned long long)osb->system_dir_blkno);
2329
2330 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2331 if (!osb->osb_dlm_debug) {
2332 status = -ENOMEM;
2333 mlog_errno(status);
2334 goto bail;
2335 }
2336
2337 atomic_set(&osb->vol_state, VOLUME_INIT);
2338
2339 /* load root, system_dir, and all global system inodes */
2340 status = ocfs2_init_global_system_inodes(osb);
2341 if (status < 0) {
2342 mlog_errno(status);
2343 goto bail;
2344 }
2345
2346 /*
2347 * global bitmap
2348 */
2349 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2350 OCFS2_INVALID_SLOT);
2351 if (!inode) {
2352 status = -EINVAL;
2353 mlog_errno(status);
2354 goto bail;
2355 }
2356
2357 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2358 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2359 iput(inode);
2360
2361 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2362 osb->s_feature_incompat) * 8;
2363
2364 status = ocfs2_init_slot_info(osb);
2365 if (status < 0) {
2366 mlog_errno(status);
2367 goto bail;
2368 }
2369
2370 bail:
2371 mlog_exit(status);
2372 return status;
2373 }
2374
2375 /*
2376 * will return: -EAGAIN if it is ok to keep searching for superblocks
2377 * -EINVAL if there is a bad superblock
2378 * 0 on success
2379 */
2380 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2381 struct buffer_head *bh,
2382 u32 blksz,
2383 struct ocfs2_blockcheck_stats *stats)
2384 {
2385 int status = -EAGAIN;
2386
2387 mlog_entry_void();
2388
2389 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2390 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2391 /* We have to do a raw check of the feature here */
2392 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2393 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2394 status = ocfs2_block_check_validate(bh->b_data,
2395 bh->b_size,
2396 &di->i_check,
2397 stats);
2398 if (status)
2399 goto out;
2400 }
2401 status = -EINVAL;
2402 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2403 mlog(ML_ERROR, "found superblock with incorrect block "
2404 "size: found %u, should be %u\n",
2405 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2406 blksz);
2407 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2408 OCFS2_MAJOR_REV_LEVEL ||
2409 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2410 OCFS2_MINOR_REV_LEVEL) {
2411 mlog(ML_ERROR, "found superblock with bad version: "
2412 "found %u.%u, should be %u.%u\n",
2413 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2414 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2415 OCFS2_MAJOR_REV_LEVEL,
2416 OCFS2_MINOR_REV_LEVEL);
2417 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2418 mlog(ML_ERROR, "bad block number on superblock: "
2419 "found %llu, should be %llu\n",
2420 (unsigned long long)le64_to_cpu(di->i_blkno),
2421 (unsigned long long)bh->b_blocknr);
2422 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2423 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2424 mlog(ML_ERROR, "bad cluster size found: %u\n",
2425 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2426 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2427 mlog(ML_ERROR, "bad root_blkno: 0\n");
2428 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2429 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2430 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2431 mlog(ML_ERROR,
2432 "Superblock slots found greater than file system "
2433 "maximum: found %u, max %u\n",
2434 le16_to_cpu(di->id2.i_super.s_max_slots),
2435 OCFS2_MAX_SLOTS);
2436 } else {
2437 /* found it! */
2438 status = 0;
2439 }
2440 }
2441
2442 out:
2443 mlog_exit(status);
2444 return status;
2445 }
2446
2447 static int ocfs2_check_volume(struct ocfs2_super *osb)
2448 {
2449 int status;
2450 int dirty;
2451 int local;
2452 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2453 * recover
2454 * ourselves. */
2455
2456 mlog_entry_void();
2457
2458 /* Init our journal object. */
2459 status = ocfs2_journal_init(osb->journal, &dirty);
2460 if (status < 0) {
2461 mlog(ML_ERROR, "Could not initialize journal!\n");
2462 goto finally;
2463 }
2464
2465 /* Now that journal has been initialized, check to make sure
2466 entire volume is addressable. */
2467 status = ocfs2_journal_addressable(osb);
2468 if (status)
2469 goto finally;
2470
2471 /* If the journal was unmounted cleanly then we don't want to
2472 * recover anything. Otherwise, journal_load will do that
2473 * dirty work for us :) */
2474 if (!dirty) {
2475 status = ocfs2_journal_wipe(osb->journal, 0);
2476 if (status < 0) {
2477 mlog_errno(status);
2478 goto finally;
2479 }
2480 } else {
2481 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2482 "recovering volume.\n");
2483 }
2484
2485 local = ocfs2_mount_local(osb);
2486
2487 /* will play back anything left in the journal. */
2488 status = ocfs2_journal_load(osb->journal, local, dirty);
2489 if (status < 0) {
2490 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2491 goto finally;
2492 }
2493
2494 if (dirty) {
2495 /* recover my local alloc if we didn't unmount cleanly. */
2496 status = ocfs2_begin_local_alloc_recovery(osb,
2497 osb->slot_num,
2498 &local_alloc);
2499 if (status < 0) {
2500 mlog_errno(status);
2501 goto finally;
2502 }
2503 /* we complete the recovery process after we've marked
2504 * ourselves as mounted. */
2505 }
2506
2507 mlog(0, "Journal loaded.\n");
2508
2509 status = ocfs2_load_local_alloc(osb);
2510 if (status < 0) {
2511 mlog_errno(status);
2512 goto finally;
2513 }
2514
2515 if (dirty) {
2516 /* Recovery will be completed after we've mounted the
2517 * rest of the volume. */
2518 osb->dirty = 1;
2519 osb->local_alloc_copy = local_alloc;
2520 local_alloc = NULL;
2521 }
2522
2523 /* go through each journal, trylock it and if you get the
2524 * lock, and it's marked as dirty, set the bit in the recover
2525 * map and launch a recovery thread for it. */
2526 status = ocfs2_mark_dead_nodes(osb);
2527 if (status < 0) {
2528 mlog_errno(status);
2529 goto finally;
2530 }
2531
2532 status = ocfs2_compute_replay_slots(osb);
2533 if (status < 0)
2534 mlog_errno(status);
2535
2536 finally:
2537 if (local_alloc)
2538 kfree(local_alloc);
2539
2540 mlog_exit(status);
2541 return status;
2542 }
2543
2544 /*
2545 * The routine gets called from dismount or close whenever a dismount on
2546 * volume is requested and the osb open count becomes 1.
2547 * It will remove the osb from the global list and also free up all the
2548 * initialized resources and fileobject.
2549 */
2550 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2551 {
2552 mlog_entry_void();
2553
2554 /* This function assumes that the caller has the main osb resource */
2555
2556 ocfs2_free_slot_info(osb);
2557
2558 kfree(osb->osb_orphan_wipes);
2559 kfree(osb->slot_recovery_generations);
2560 /* FIXME
2561 * This belongs in journal shutdown, but because we have to
2562 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2563 * we free it here.
2564 */
2565 kfree(osb->journal);
2566 if (osb->local_alloc_copy)
2567 kfree(osb->local_alloc_copy);
2568 kfree(osb->uuid_str);
2569 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2570 memset(osb, 0, sizeof(struct ocfs2_super));
2571
2572 mlog_exit_void();
2573 }
2574
2575 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2576 * panic(). We do not support continue-on-error operation. */
2577 static void ocfs2_handle_error(struct super_block *sb)
2578 {
2579 struct ocfs2_super *osb = OCFS2_SB(sb);
2580
2581 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2582 panic("OCFS2: (device %s): panic forced after error\n",
2583 sb->s_id);
2584
2585 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2586
2587 if (sb->s_flags & MS_RDONLY &&
2588 (ocfs2_is_soft_readonly(osb) ||
2589 ocfs2_is_hard_readonly(osb)))
2590 return;
2591
2592 printk(KERN_CRIT "File system is now read-only due to the potential "
2593 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2594 "system is unmounted.\n");
2595 sb->s_flags |= MS_RDONLY;
2596 ocfs2_set_ro_flag(osb, 0);
2597 }
2598
2599 static char error_buf[1024];
2600
2601 void __ocfs2_error(struct super_block *sb,
2602 const char *function,
2603 const char *fmt, ...)
2604 {
2605 va_list args;
2606
2607 va_start(args, fmt);
2608 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2609 va_end(args);
2610
2611 /* Not using mlog here because we want to show the actual
2612 * function the error came from. */
2613 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2614 sb->s_id, function, error_buf);
2615
2616 ocfs2_handle_error(sb);
2617 }
2618
2619 /* Handle critical errors. This is intentionally more drastic than
2620 * ocfs2_handle_error, so we only use for things like journal errors,
2621 * etc. */
2622 void __ocfs2_abort(struct super_block* sb,
2623 const char *function,
2624 const char *fmt, ...)
2625 {
2626 va_list args;
2627
2628 va_start(args, fmt);
2629 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2630 va_end(args);
2631
2632 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2633 sb->s_id, function, error_buf);
2634
2635 /* We don't have the cluster support yet to go straight to
2636 * hard readonly in here. Until then, we want to keep
2637 * ocfs2_abort() so that we can at least mark critical
2638 * errors.
2639 *
2640 * TODO: This should abort the journal and alert other nodes
2641 * that our slot needs recovery. */
2642
2643 /* Force a panic(). This stinks, but it's better than letting
2644 * things continue without having a proper hard readonly
2645 * here. */
2646 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2647 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2648 ocfs2_handle_error(sb);
2649 }
2650
2651 /*
2652 * Void signal blockers, because in-kernel sigprocmask() only fails
2653 * when SIG_* is wrong.
2654 */
2655 void ocfs2_block_signals(sigset_t *oldset)
2656 {
2657 int rc;
2658 sigset_t blocked;
2659
2660 sigfillset(&blocked);
2661 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2662 BUG_ON(rc);
2663 }
2664
2665 void ocfs2_unblock_signals(sigset_t *oldset)
2666 {
2667 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2668 BUG_ON(rc);
2669 }
2670
2671 module_init(ocfs2_init);
2672 module_exit(ocfs2_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree