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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ocfs2 / super.c
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/smp_lock.h>
45
46 #define MLOG_MASK_PREFIX ML_SUPER
47 #include <cluster/masklog.h>
48
49 #include "ocfs2.h"
50
51 /* this should be the only file to include a version 1 header */
52 #include "ocfs1_fs_compat.h"
53
54 #include "alloc.h"
55 #include "blockcheck.h"
56 #include "dlmglue.h"
57 #include "export.h"
58 #include "extent_map.h"
59 #include "heartbeat.h"
60 #include "inode.h"
61 #include "journal.h"
62 #include "localalloc.h"
63 #include "namei.h"
64 #include "slot_map.h"
65 #include "super.h"
66 #include "sysfile.h"
67 #include "uptodate.h"
68 #include "ver.h"
69 #include "xattr.h"
70 #include "quota.h"
71 #include "refcounttree.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 unsigned int localalloc_opt;
97 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
98 };
99
100 static int ocfs2_parse_options(struct super_block *sb, char *options,
101 struct mount_options *mopt,
102 int is_remount);
103 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
104 static void ocfs2_put_super(struct super_block *sb);
105 static int ocfs2_mount_volume(struct super_block *sb);
106 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
107 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
108 static int ocfs2_initialize_mem_caches(void);
109 static void ocfs2_free_mem_caches(void);
110 static void ocfs2_delete_osb(struct ocfs2_super *osb);
111
112 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
113
114 static int ocfs2_sync_fs(struct super_block *sb, int wait);
115
116 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
117 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
118 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
119 static int ocfs2_check_volume(struct ocfs2_super *osb);
120 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
121 struct buffer_head *bh,
122 u32 sectsize,
123 struct ocfs2_blockcheck_stats *stats);
124 static int ocfs2_initialize_super(struct super_block *sb,
125 struct buffer_head *bh,
126 int sector_size,
127 struct ocfs2_blockcheck_stats *stats);
128 static int ocfs2_get_sector(struct super_block *sb,
129 struct buffer_head **bh,
130 int block,
131 int sect_size);
132 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
133 static void ocfs2_destroy_inode(struct inode *inode);
134 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
135 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
136 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
137
138 static const struct super_operations ocfs2_sops = {
139 .statfs = ocfs2_statfs,
140 .alloc_inode = ocfs2_alloc_inode,
141 .destroy_inode = ocfs2_destroy_inode,
142 .drop_inode = ocfs2_drop_inode,
143 .clear_inode = ocfs2_clear_inode,
144 .delete_inode = ocfs2_delete_inode,
145 .sync_fs = ocfs2_sync_fs,
146 .put_super = ocfs2_put_super,
147 .remount_fs = ocfs2_remount,
148 .show_options = ocfs2_show_options,
149 .quota_read = ocfs2_quota_read,
150 .quota_write = ocfs2_quota_write,
151 };
152
153 enum {
154 Opt_barrier,
155 Opt_err_panic,
156 Opt_err_ro,
157 Opt_intr,
158 Opt_nointr,
159 Opt_hb_none,
160 Opt_hb_local,
161 Opt_data_ordered,
162 Opt_data_writeback,
163 Opt_atime_quantum,
164 Opt_slot,
165 Opt_commit,
166 Opt_localalloc,
167 Opt_localflocks,
168 Opt_stack,
169 Opt_user_xattr,
170 Opt_nouser_xattr,
171 Opt_inode64,
172 Opt_acl,
173 Opt_noacl,
174 Opt_usrquota,
175 Opt_grpquota,
176 Opt_err,
177 };
178
179 static const match_table_t tokens = {
180 {Opt_barrier, "barrier=%u"},
181 {Opt_err_panic, "errors=panic"},
182 {Opt_err_ro, "errors=remount-ro"},
183 {Opt_intr, "intr"},
184 {Opt_nointr, "nointr"},
185 {Opt_hb_none, OCFS2_HB_NONE},
186 {Opt_hb_local, OCFS2_HB_LOCAL},
187 {Opt_data_ordered, "data=ordered"},
188 {Opt_data_writeback, "data=writeback"},
189 {Opt_atime_quantum, "atime_quantum=%u"},
190 {Opt_slot, "preferred_slot=%u"},
191 {Opt_commit, "commit=%u"},
192 {Opt_localalloc, "localalloc=%d"},
193 {Opt_localflocks, "localflocks"},
194 {Opt_stack, "cluster_stack=%s"},
195 {Opt_user_xattr, "user_xattr"},
196 {Opt_nouser_xattr, "nouser_xattr"},
197 {Opt_inode64, "inode64"},
198 {Opt_acl, "acl"},
199 {Opt_noacl, "noacl"},
200 {Opt_usrquota, "usrquota"},
201 {Opt_grpquota, "grpquota"},
202 {Opt_err, NULL}
203 };
204
205 #ifdef CONFIG_DEBUG_FS
206 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
207 {
208 struct ocfs2_cluster_connection *cconn = osb->cconn;
209 struct ocfs2_recovery_map *rm = osb->recovery_map;
210 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
211 int i, out = 0;
212
213 out += snprintf(buf + out, len - out,
214 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
215 "Device", osb->dev_str, osb->uuid_str,
216 osb->fs_generation, osb->vol_label);
217
218 out += snprintf(buf + out, len - out,
219 "%10s => State: %d Flags: 0x%lX\n", "Volume",
220 atomic_read(&osb->vol_state), osb->osb_flags);
221
222 out += snprintf(buf + out, len - out,
223 "%10s => Block: %lu Cluster: %d\n", "Sizes",
224 osb->sb->s_blocksize, osb->s_clustersize);
225
226 out += snprintf(buf + out, len - out,
227 "%10s => Compat: 0x%X Incompat: 0x%X "
228 "ROcompat: 0x%X\n",
229 "Features", osb->s_feature_compat,
230 osb->s_feature_incompat, osb->s_feature_ro_compat);
231
232 out += snprintf(buf + out, len - out,
233 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
234 osb->s_mount_opt, osb->s_atime_quantum);
235
236 if (cconn) {
237 out += snprintf(buf + out, len - out,
238 "%10s => Stack: %s Name: %*s "
239 "Version: %d.%d\n", "Cluster",
240 (*osb->osb_cluster_stack == '\0' ?
241 "o2cb" : osb->osb_cluster_stack),
242 cconn->cc_namelen, cconn->cc_name,
243 cconn->cc_version.pv_major,
244 cconn->cc_version.pv_minor);
245 }
246
247 spin_lock(&osb->dc_task_lock);
248 out += snprintf(buf + out, len - out,
249 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
250 "WorkSeq: %lu\n", "DownCnvt",
251 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
252 osb->blocked_lock_count, osb->dc_wake_sequence,
253 osb->dc_work_sequence);
254 spin_unlock(&osb->dc_task_lock);
255
256 spin_lock(&osb->osb_lock);
257 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
258 "Recovery",
259 (osb->recovery_thread_task ?
260 task_pid_nr(osb->recovery_thread_task) : -1));
261 if (rm->rm_used == 0)
262 out += snprintf(buf + out, len - out, " None\n");
263 else {
264 for (i = 0; i < rm->rm_used; i++)
265 out += snprintf(buf + out, len - out, " %d",
266 rm->rm_entries[i]);
267 out += snprintf(buf + out, len - out, "\n");
268 }
269 spin_unlock(&osb->osb_lock);
270
271 out += snprintf(buf + out, len - out,
272 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
273 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
274 osb->osb_commit_interval,
275 atomic_read(&osb->needs_checkpoint));
276
277 out += snprintf(buf + out, len - out,
278 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
279 "Journal", osb->journal->j_state,
280 osb->journal->j_trans_id,
281 atomic_read(&osb->journal->j_num_trans));
282
283 out += snprintf(buf + out, len - out,
284 "%10s => GlobalAllocs: %d LocalAllocs: %d "
285 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
286 "Stats",
287 atomic_read(&osb->alloc_stats.bitmap_data),
288 atomic_read(&osb->alloc_stats.local_data),
289 atomic_read(&osb->alloc_stats.bg_allocs),
290 atomic_read(&osb->alloc_stats.moves),
291 atomic_read(&osb->alloc_stats.bg_extends));
292
293 out += snprintf(buf + out, len - out,
294 "%10s => State: %u Descriptor: %llu Size: %u bits "
295 "Default: %u bits\n",
296 "LocalAlloc", osb->local_alloc_state,
297 (unsigned long long)osb->la_last_gd,
298 osb->local_alloc_bits, osb->local_alloc_default_bits);
299
300 spin_lock(&osb->osb_lock);
301 out += snprintf(buf + out, len - out,
302 "%10s => Slot: %d NumStolen: %d\n", "Steal",
303 osb->s_inode_steal_slot,
304 atomic_read(&osb->s_num_inodes_stolen));
305 spin_unlock(&osb->osb_lock);
306
307 out += snprintf(buf + out, len - out, "OrphanScan => ");
308 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
309 os->os_count, os->os_seqno);
310 out += snprintf(buf + out, len - out, " Last Scan: ");
311 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
312 out += snprintf(buf + out, len - out, "Disabled\n");
313 else
314 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
315 (get_seconds() - os->os_scantime.tv_sec));
316
317 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
318 "Slots", "Num", "RecoGen");
319 for (i = 0; i < osb->max_slots; ++i) {
320 out += snprintf(buf + out, len - out,
321 "%10s %c %3d %10d\n",
322 " ",
323 (i == osb->slot_num ? '*' : ' '),
324 i, osb->slot_recovery_generations[i]);
325 }
326
327 return out;
328 }
329
330 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
331 {
332 struct ocfs2_super *osb = inode->i_private;
333 char *buf = NULL;
334
335 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
336 if (!buf)
337 goto bail;
338
339 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
340
341 file->private_data = buf;
342
343 return 0;
344 bail:
345 return -ENOMEM;
346 }
347
348 static int ocfs2_debug_release(struct inode *inode, struct file *file)
349 {
350 kfree(file->private_data);
351 return 0;
352 }
353
354 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
355 size_t nbytes, loff_t *ppos)
356 {
357 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
358 i_size_read(file->f_mapping->host));
359 }
360 #else
361 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
362 {
363 return 0;
364 }
365 static int ocfs2_debug_release(struct inode *inode, struct file *file)
366 {
367 return 0;
368 }
369 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
370 size_t nbytes, loff_t *ppos)
371 {
372 return 0;
373 }
374 #endif /* CONFIG_DEBUG_FS */
375
376 static const struct file_operations ocfs2_osb_debug_fops = {
377 .open = ocfs2_osb_debug_open,
378 .release = ocfs2_debug_release,
379 .read = ocfs2_debug_read,
380 .llseek = generic_file_llseek,
381 };
382
383 static int ocfs2_sync_fs(struct super_block *sb, int wait)
384 {
385 int status;
386 tid_t target;
387 struct ocfs2_super *osb = OCFS2_SB(sb);
388
389 if (ocfs2_is_hard_readonly(osb))
390 return -EROFS;
391
392 if (wait) {
393 status = ocfs2_flush_truncate_log(osb);
394 if (status < 0)
395 mlog_errno(status);
396 } else {
397 ocfs2_schedule_truncate_log_flush(osb, 0);
398 }
399
400 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
401 &target)) {
402 if (wait)
403 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
404 target);
405 }
406 return 0;
407 }
408
409 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
410 {
411 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
412 && (ino == USER_QUOTA_SYSTEM_INODE
413 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
414 return 0;
415 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
416 && (ino == GROUP_QUOTA_SYSTEM_INODE
417 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
418 return 0;
419 return 1;
420 }
421
422 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
423 {
424 struct inode *new = NULL;
425 int status = 0;
426 int i;
427
428 mlog_entry_void();
429
430 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
431 if (IS_ERR(new)) {
432 status = PTR_ERR(new);
433 mlog_errno(status);
434 goto bail;
435 }
436 osb->root_inode = new;
437
438 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
439 if (IS_ERR(new)) {
440 status = PTR_ERR(new);
441 mlog_errno(status);
442 goto bail;
443 }
444 osb->sys_root_inode = new;
445
446 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
447 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
448 if (!ocfs2_need_system_inode(osb, i))
449 continue;
450 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
451 if (!new) {
452 ocfs2_release_system_inodes(osb);
453 status = -EINVAL;
454 mlog_errno(status);
455 /* FIXME: Should ERROR_RO_FS */
456 mlog(ML_ERROR, "Unable to load system inode %d, "
457 "possibly corrupt fs?", i);
458 goto bail;
459 }
460 // the array now has one ref, so drop this one
461 iput(new);
462 }
463
464 bail:
465 mlog_exit(status);
466 return status;
467 }
468
469 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
470 {
471 struct inode *new = NULL;
472 int status = 0;
473 int i;
474
475 mlog_entry_void();
476
477 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
478 i < NUM_SYSTEM_INODES;
479 i++) {
480 if (!ocfs2_need_system_inode(osb, i))
481 continue;
482 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
483 if (!new) {
484 ocfs2_release_system_inodes(osb);
485 status = -EINVAL;
486 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
487 status, i, osb->slot_num);
488 goto bail;
489 }
490 /* the array now has one ref, so drop this one */
491 iput(new);
492 }
493
494 bail:
495 mlog_exit(status);
496 return status;
497 }
498
499 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
500 {
501 int i;
502 struct inode *inode;
503
504 mlog_entry_void();
505
506 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
507 inode = osb->system_inodes[i];
508 if (inode) {
509 iput(inode);
510 osb->system_inodes[i] = NULL;
511 }
512 }
513
514 inode = osb->sys_root_inode;
515 if (inode) {
516 iput(inode);
517 osb->sys_root_inode = NULL;
518 }
519
520 inode = osb->root_inode;
521 if (inode) {
522 iput(inode);
523 osb->root_inode = NULL;
524 }
525
526 mlog_exit(0);
527 }
528
529 /* We're allocating fs objects, use GFP_NOFS */
530 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
531 {
532 struct ocfs2_inode_info *oi;
533
534 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
535 if (!oi)
536 return NULL;
537
538 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
539 return &oi->vfs_inode;
540 }
541
542 static void ocfs2_destroy_inode(struct inode *inode)
543 {
544 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
545 }
546
547 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
548 unsigned int cbits)
549 {
550 unsigned int bytes = 1 << cbits;
551 unsigned int trim = bytes;
552 unsigned int bitshift = 32;
553
554 /*
555 * i_size and all block offsets in ocfs2 are always 64 bits
556 * wide. i_clusters is 32 bits, in cluster-sized units. So on
557 * 64 bit platforms, cluster size will be the limiting factor.
558 */
559
560 #if BITS_PER_LONG == 32
561 # if defined(CONFIG_LBDAF)
562 BUILD_BUG_ON(sizeof(sector_t) != 8);
563 /*
564 * We might be limited by page cache size.
565 */
566 if (bytes > PAGE_CACHE_SIZE) {
567 bytes = PAGE_CACHE_SIZE;
568 trim = 1;
569 /*
570 * Shift by 31 here so that we don't get larger than
571 * MAX_LFS_FILESIZE
572 */
573 bitshift = 31;
574 }
575 # else
576 /*
577 * We are limited by the size of sector_t. Use block size, as
578 * that's what we expose to the VFS.
579 */
580 bytes = 1 << bbits;
581 trim = 1;
582 bitshift = 31;
583 # endif
584 #endif
585
586 /*
587 * Trim by a whole cluster when we can actually approach the
588 * on-disk limits. Otherwise we can overflow i_clusters when
589 * an extent start is at the max offset.
590 */
591 return (((unsigned long long)bytes) << bitshift) - trim;
592 }
593
594 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
595 {
596 int incompat_features;
597 int ret = 0;
598 struct mount_options parsed_options;
599 struct ocfs2_super *osb = OCFS2_SB(sb);
600
601 lock_kernel();
602
603 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
604 ret = -EINVAL;
605 goto out;
606 }
607
608 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
609 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
610 ret = -EINVAL;
611 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
612 goto out;
613 }
614
615 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
616 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
617 ret = -EINVAL;
618 mlog(ML_ERROR, "Cannot change data mode on remount\n");
619 goto out;
620 }
621
622 /* Probably don't want this on remount; it might
623 * mess with other nodes */
624 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
625 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
626 ret = -EINVAL;
627 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
628 goto out;
629 }
630
631 /* We're going to/from readonly mode. */
632 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
633 /* Disable quota accounting before remounting RO */
634 if (*flags & MS_RDONLY) {
635 ret = ocfs2_susp_quotas(osb, 0);
636 if (ret < 0)
637 goto out;
638 }
639 /* Lock here so the check of HARD_RO and the potential
640 * setting of SOFT_RO is atomic. */
641 spin_lock(&osb->osb_lock);
642 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
643 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
644 ret = -EROFS;
645 goto unlock_osb;
646 }
647
648 if (*flags & MS_RDONLY) {
649 mlog(0, "Going to ro mode.\n");
650 sb->s_flags |= MS_RDONLY;
651 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
652 } else {
653 mlog(0, "Making ro filesystem writeable.\n");
654
655 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
656 mlog(ML_ERROR, "Cannot remount RDWR "
657 "filesystem due to previous errors.\n");
658 ret = -EROFS;
659 goto unlock_osb;
660 }
661 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
662 if (incompat_features) {
663 mlog(ML_ERROR, "Cannot remount RDWR because "
664 "of unsupported optional features "
665 "(%x).\n", incompat_features);
666 ret = -EINVAL;
667 goto unlock_osb;
668 }
669 sb->s_flags &= ~MS_RDONLY;
670 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
671 }
672 unlock_osb:
673 spin_unlock(&osb->osb_lock);
674 /* Enable quota accounting after remounting RW */
675 if (!ret && !(*flags & MS_RDONLY)) {
676 if (sb_any_quota_suspended(sb))
677 ret = ocfs2_susp_quotas(osb, 1);
678 else
679 ret = ocfs2_enable_quotas(osb);
680 if (ret < 0) {
681 /* Return back changes... */
682 spin_lock(&osb->osb_lock);
683 sb->s_flags |= MS_RDONLY;
684 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
685 spin_unlock(&osb->osb_lock);
686 goto out;
687 }
688 }
689 }
690
691 if (!ret) {
692 /* Only save off the new mount options in case of a successful
693 * remount. */
694 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
695 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
696 osb->s_mount_opt = parsed_options.mount_opt;
697 osb->s_atime_quantum = parsed_options.atime_quantum;
698 osb->preferred_slot = parsed_options.slot;
699 if (parsed_options.commit_interval)
700 osb->osb_commit_interval = parsed_options.commit_interval;
701
702 if (!ocfs2_is_hard_readonly(osb))
703 ocfs2_set_journal_params(osb);
704 }
705 out:
706 unlock_kernel();
707 return ret;
708 }
709
710 static int ocfs2_sb_probe(struct super_block *sb,
711 struct buffer_head **bh,
712 int *sector_size,
713 struct ocfs2_blockcheck_stats *stats)
714 {
715 int status, tmpstat;
716 struct ocfs1_vol_disk_hdr *hdr;
717 struct ocfs2_dinode *di;
718 int blksize;
719
720 *bh = NULL;
721
722 /* may be > 512 */
723 *sector_size = bdev_logical_block_size(sb->s_bdev);
724 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
725 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
726 *sector_size, OCFS2_MAX_BLOCKSIZE);
727 status = -EINVAL;
728 goto bail;
729 }
730
731 /* Can this really happen? */
732 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
733 *sector_size = OCFS2_MIN_BLOCKSIZE;
734
735 /* check block zero for old format */
736 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
737 if (status < 0) {
738 mlog_errno(status);
739 goto bail;
740 }
741 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
742 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
743 mlog(ML_ERROR, "incompatible version: %u.%u\n",
744 hdr->major_version, hdr->minor_version);
745 status = -EINVAL;
746 }
747 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
748 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
749 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
750 hdr->signature);
751 status = -EINVAL;
752 }
753 brelse(*bh);
754 *bh = NULL;
755 if (status < 0) {
756 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
757 "upgraded before mounting with ocfs v2\n");
758 goto bail;
759 }
760
761 /*
762 * Now check at magic offset for 512, 1024, 2048, 4096
763 * blocksizes. 4096 is the maximum blocksize because it is
764 * the minimum clustersize.
765 */
766 status = -EINVAL;
767 for (blksize = *sector_size;
768 blksize <= OCFS2_MAX_BLOCKSIZE;
769 blksize <<= 1) {
770 tmpstat = ocfs2_get_sector(sb, bh,
771 OCFS2_SUPER_BLOCK_BLKNO,
772 blksize);
773 if (tmpstat < 0) {
774 status = tmpstat;
775 mlog_errno(status);
776 break;
777 }
778 di = (struct ocfs2_dinode *) (*bh)->b_data;
779 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
780 spin_lock_init(&stats->b_lock);
781 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
782 if (tmpstat < 0) {
783 brelse(*bh);
784 *bh = NULL;
785 }
786 if (tmpstat != -EAGAIN) {
787 status = tmpstat;
788 break;
789 }
790 }
791
792 bail:
793 return status;
794 }
795
796 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
797 {
798 if (ocfs2_mount_local(osb)) {
799 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
800 mlog(ML_ERROR, "Cannot heartbeat on a locally "
801 "mounted device.\n");
802 return -EINVAL;
803 }
804 }
805
806 if (ocfs2_userspace_stack(osb)) {
807 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
808 mlog(ML_ERROR, "Userspace stack expected, but "
809 "o2cb heartbeat arguments passed to mount\n");
810 return -EINVAL;
811 }
812 }
813
814 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
815 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
816 !ocfs2_userspace_stack(osb)) {
817 mlog(ML_ERROR, "Heartbeat has to be started to mount "
818 "a read-write clustered device.\n");
819 return -EINVAL;
820 }
821 }
822
823 return 0;
824 }
825
826 /*
827 * If we're using a userspace stack, mount should have passed
828 * a name that matches the disk. If not, mount should not
829 * have passed a stack.
830 */
831 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
832 struct mount_options *mopt)
833 {
834 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
835 mlog(ML_ERROR,
836 "cluster stack passed to mount, but this filesystem "
837 "does not support it\n");
838 return -EINVAL;
839 }
840
841 if (ocfs2_userspace_stack(osb) &&
842 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
843 OCFS2_STACK_LABEL_LEN)) {
844 mlog(ML_ERROR,
845 "cluster stack passed to mount (\"%s\") does not "
846 "match the filesystem (\"%s\")\n",
847 mopt->cluster_stack,
848 osb->osb_cluster_stack);
849 return -EINVAL;
850 }
851
852 return 0;
853 }
854
855 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
856 {
857 int type;
858 struct super_block *sb = osb->sb;
859 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
860 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
861 int status = 0;
862
863 for (type = 0; type < MAXQUOTAS; type++) {
864 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
865 continue;
866 if (unsuspend)
867 status = vfs_quota_enable(
868 sb_dqopt(sb)->files[type],
869 type, QFMT_OCFS2,
870 DQUOT_SUSPENDED);
871 else
872 status = vfs_quota_disable(sb, type,
873 DQUOT_SUSPENDED);
874 if (status < 0)
875 break;
876 }
877 if (status < 0)
878 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
879 "remount (error = %d).\n", status);
880 return status;
881 }
882
883 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
884 {
885 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
886 struct super_block *sb = osb->sb;
887 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
888 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
889 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
890 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
891 int status;
892 int type;
893
894 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
895 for (type = 0; type < MAXQUOTAS; type++) {
896 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
897 continue;
898 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
899 osb->slot_num);
900 if (!inode[type]) {
901 status = -ENOENT;
902 goto out_quota_off;
903 }
904 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2,
905 DQUOT_USAGE_ENABLED);
906 if (status < 0)
907 goto out_quota_off;
908 }
909
910 for (type = 0; type < MAXQUOTAS; type++)
911 iput(inode[type]);
912 return 0;
913 out_quota_off:
914 ocfs2_disable_quotas(osb);
915 for (type = 0; type < MAXQUOTAS; type++)
916 iput(inode[type]);
917 mlog_errno(status);
918 return status;
919 }
920
921 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
922 {
923 int type;
924 struct inode *inode;
925 struct super_block *sb = osb->sb;
926
927 /* We mostly ignore errors in this function because there's not much
928 * we can do when we see them */
929 for (type = 0; type < MAXQUOTAS; type++) {
930 if (!sb_has_quota_loaded(sb, type))
931 continue;
932 inode = igrab(sb->s_dquot.files[type]);
933 /* Turn off quotas. This will remove all dquot structures from
934 * memory and so they will be automatically synced to global
935 * quota files */
936 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED |
937 DQUOT_LIMITS_ENABLED);
938 if (!inode)
939 continue;
940 iput(inode);
941 }
942 }
943
944 /* Handle quota on quotactl */
945 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
946 char *path, int remount)
947 {
948 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
949 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
950
951 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
952 return -EINVAL;
953
954 if (remount)
955 return 0; /* Just ignore it has been handled in
956 * ocfs2_remount() */
957 return vfs_quota_enable(sb_dqopt(sb)->files[type], type,
958 format_id, DQUOT_LIMITS_ENABLED);
959 }
960
961 /* Handle quota off quotactl */
962 static int ocfs2_quota_off(struct super_block *sb, int type, int remount)
963 {
964 if (remount)
965 return 0; /* Ignore now and handle later in
966 * ocfs2_remount() */
967 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
968 }
969
970 static const struct quotactl_ops ocfs2_quotactl_ops = {
971 .quota_on = ocfs2_quota_on,
972 .quota_off = ocfs2_quota_off,
973 .quota_sync = vfs_quota_sync,
974 .get_info = vfs_get_dqinfo,
975 .set_info = vfs_set_dqinfo,
976 .get_dqblk = vfs_get_dqblk,
977 .set_dqblk = vfs_set_dqblk,
978 };
979
980 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
981 {
982 struct dentry *root;
983 int status, sector_size;
984 struct mount_options parsed_options;
985 struct inode *inode = NULL;
986 struct ocfs2_super *osb = NULL;
987 struct buffer_head *bh = NULL;
988 char nodestr[8];
989 struct ocfs2_blockcheck_stats stats;
990
991 mlog_entry("%p, %p, %i", sb, data, silent);
992
993 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
994 status = -EINVAL;
995 goto read_super_error;
996 }
997
998 /* probe for superblock */
999 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1000 if (status < 0) {
1001 mlog(ML_ERROR, "superblock probe failed!\n");
1002 goto read_super_error;
1003 }
1004
1005 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1006 osb = OCFS2_SB(sb);
1007 if (status < 0) {
1008 mlog_errno(status);
1009 goto read_super_error;
1010 }
1011 brelse(bh);
1012 bh = NULL;
1013
1014 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
1015 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1016
1017 osb->s_mount_opt = parsed_options.mount_opt;
1018 osb->s_atime_quantum = parsed_options.atime_quantum;
1019 osb->preferred_slot = parsed_options.slot;
1020 osb->osb_commit_interval = parsed_options.commit_interval;
1021 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
1022 osb->local_alloc_bits = osb->local_alloc_default_bits;
1023 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA &&
1024 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1025 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1026 status = -EINVAL;
1027 mlog(ML_ERROR, "User quotas were requested, but this "
1028 "filesystem does not have the feature enabled.\n");
1029 goto read_super_error;
1030 }
1031 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1032 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1033 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1034 status = -EINVAL;
1035 mlog(ML_ERROR, "Group quotas were requested, but this "
1036 "filesystem does not have the feature enabled.\n");
1037 goto read_super_error;
1038 }
1039
1040 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1041 if (status)
1042 goto read_super_error;
1043
1044 sb->s_magic = OCFS2_SUPER_MAGIC;
1045
1046 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1047 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1048
1049 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1050 * heartbeat=none */
1051 if (bdev_read_only(sb->s_bdev)) {
1052 if (!(sb->s_flags & MS_RDONLY)) {
1053 status = -EACCES;
1054 mlog(ML_ERROR, "Readonly device detected but readonly "
1055 "mount was not specified.\n");
1056 goto read_super_error;
1057 }
1058
1059 /* You should not be able to start a local heartbeat
1060 * on a readonly device. */
1061 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1062 status = -EROFS;
1063 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1064 "device.\n");
1065 goto read_super_error;
1066 }
1067
1068 status = ocfs2_check_journals_nolocks(osb);
1069 if (status < 0) {
1070 if (status == -EROFS)
1071 mlog(ML_ERROR, "Recovery required on readonly "
1072 "file system, but write access is "
1073 "unavailable.\n");
1074 else
1075 mlog_errno(status);
1076 goto read_super_error;
1077 }
1078
1079 ocfs2_set_ro_flag(osb, 1);
1080
1081 printk(KERN_NOTICE "Readonly device detected. No cluster "
1082 "services will be utilized for this mount. Recovery "
1083 "will be skipped.\n");
1084 }
1085
1086 if (!ocfs2_is_hard_readonly(osb)) {
1087 if (sb->s_flags & MS_RDONLY)
1088 ocfs2_set_ro_flag(osb, 0);
1089 }
1090
1091 status = ocfs2_verify_heartbeat(osb);
1092 if (status < 0) {
1093 mlog_errno(status);
1094 goto read_super_error;
1095 }
1096
1097 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1098 ocfs2_debugfs_root);
1099 if (!osb->osb_debug_root) {
1100 status = -EINVAL;
1101 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1102 goto read_super_error;
1103 }
1104
1105 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1106 osb->osb_debug_root,
1107 osb,
1108 &ocfs2_osb_debug_fops);
1109 if (!osb->osb_ctxt) {
1110 status = -EINVAL;
1111 mlog_errno(status);
1112 goto read_super_error;
1113 }
1114
1115 if (ocfs2_meta_ecc(osb)) {
1116 status = ocfs2_blockcheck_stats_debugfs_install(
1117 &osb->osb_ecc_stats,
1118 osb->osb_debug_root);
1119 if (status) {
1120 mlog(ML_ERROR,
1121 "Unable to create blockcheck statistics "
1122 "files\n");
1123 goto read_super_error;
1124 }
1125 }
1126
1127 status = ocfs2_mount_volume(sb);
1128 if (osb->root_inode)
1129 inode = igrab(osb->root_inode);
1130
1131 if (status < 0)
1132 goto read_super_error;
1133
1134 if (!inode) {
1135 status = -EIO;
1136 mlog_errno(status);
1137 goto read_super_error;
1138 }
1139
1140 root = d_alloc_root(inode);
1141 if (!root) {
1142 status = -ENOMEM;
1143 mlog_errno(status);
1144 goto read_super_error;
1145 }
1146
1147 sb->s_root = root;
1148
1149 ocfs2_complete_mount_recovery(osb);
1150
1151 if (ocfs2_mount_local(osb))
1152 snprintf(nodestr, sizeof(nodestr), "local");
1153 else
1154 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1155
1156 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1157 "with %s data mode.\n",
1158 osb->dev_str, nodestr, osb->slot_num,
1159 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1160 "ordered");
1161
1162 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1163 wake_up(&osb->osb_mount_event);
1164
1165 /* Now we can initialize quotas because we can afford to wait
1166 * for cluster locks recovery now. That also means that truncation
1167 * log recovery can happen but that waits for proper quota setup */
1168 if (!(sb->s_flags & MS_RDONLY)) {
1169 status = ocfs2_enable_quotas(osb);
1170 if (status < 0) {
1171 /* We have to err-out specially here because
1172 * s_root is already set */
1173 mlog_errno(status);
1174 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1175 wake_up(&osb->osb_mount_event);
1176 mlog_exit(status);
1177 return status;
1178 }
1179 }
1180
1181 ocfs2_complete_quota_recovery(osb);
1182
1183 /* Now we wake up again for processes waiting for quotas */
1184 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1185 wake_up(&osb->osb_mount_event);
1186
1187 /* Start this when the mount is almost sure of being successful */
1188 ocfs2_orphan_scan_start(osb);
1189
1190 mlog_exit(status);
1191 return status;
1192
1193 read_super_error:
1194 brelse(bh);
1195
1196 if (inode)
1197 iput(inode);
1198
1199 if (osb) {
1200 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1201 wake_up(&osb->osb_mount_event);
1202 ocfs2_dismount_volume(sb, 1);
1203 }
1204
1205 mlog_exit(status);
1206 return status;
1207 }
1208
1209 static int ocfs2_get_sb(struct file_system_type *fs_type,
1210 int flags,
1211 const char *dev_name,
1212 void *data,
1213 struct vfsmount *mnt)
1214 {
1215 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1216 mnt);
1217 }
1218
1219 static void ocfs2_kill_sb(struct super_block *sb)
1220 {
1221 struct ocfs2_super *osb = OCFS2_SB(sb);
1222
1223 /* Failed mount? */
1224 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1225 goto out;
1226
1227 /* Prevent further queueing of inode drop events */
1228 spin_lock(&dentry_list_lock);
1229 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1230 spin_unlock(&dentry_list_lock);
1231 /* Wait for work to finish and/or remove it */
1232 cancel_work_sync(&osb->dentry_lock_work);
1233 out:
1234 kill_block_super(sb);
1235 }
1236
1237 static struct file_system_type ocfs2_fs_type = {
1238 .owner = THIS_MODULE,
1239 .name = "ocfs2",
1240 .get_sb = ocfs2_get_sb, /* is this called when we mount
1241 * the fs? */
1242 .kill_sb = ocfs2_kill_sb,
1243
1244 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1245 .next = NULL
1246 };
1247
1248 static int ocfs2_parse_options(struct super_block *sb,
1249 char *options,
1250 struct mount_options *mopt,
1251 int is_remount)
1252 {
1253 int status;
1254 char *p;
1255
1256 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1257 options ? options : "(none)");
1258
1259 mopt->commit_interval = 0;
1260 mopt->mount_opt = 0;
1261 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1262 mopt->slot = OCFS2_INVALID_SLOT;
1263 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
1264 mopt->cluster_stack[0] = '\0';
1265
1266 if (!options) {
1267 status = 1;
1268 goto bail;
1269 }
1270
1271 while ((p = strsep(&options, ",")) != NULL) {
1272 int token, option;
1273 substring_t args[MAX_OPT_ARGS];
1274
1275 if (!*p)
1276 continue;
1277
1278 token = match_token(p, tokens, args);
1279 switch (token) {
1280 case Opt_hb_local:
1281 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1282 break;
1283 case Opt_hb_none:
1284 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
1285 break;
1286 case Opt_barrier:
1287 if (match_int(&args[0], &option)) {
1288 status = 0;
1289 goto bail;
1290 }
1291 if (option)
1292 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1293 else
1294 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1295 break;
1296 case Opt_intr:
1297 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1298 break;
1299 case Opt_nointr:
1300 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1301 break;
1302 case Opt_err_panic:
1303 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1304 break;
1305 case Opt_err_ro:
1306 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1307 break;
1308 case Opt_data_ordered:
1309 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1310 break;
1311 case Opt_data_writeback:
1312 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1313 break;
1314 case Opt_user_xattr:
1315 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1316 break;
1317 case Opt_nouser_xattr:
1318 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1319 break;
1320 case Opt_atime_quantum:
1321 if (match_int(&args[0], &option)) {
1322 status = 0;
1323 goto bail;
1324 }
1325 if (option >= 0)
1326 mopt->atime_quantum = option;
1327 break;
1328 case Opt_slot:
1329 option = 0;
1330 if (match_int(&args[0], &option)) {
1331 status = 0;
1332 goto bail;
1333 }
1334 if (option)
1335 mopt->slot = (s16)option;
1336 break;
1337 case Opt_commit:
1338 option = 0;
1339 if (match_int(&args[0], &option)) {
1340 status = 0;
1341 goto bail;
1342 }
1343 if (option < 0)
1344 return 0;
1345 if (option == 0)
1346 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1347 mopt->commit_interval = HZ * option;
1348 break;
1349 case Opt_localalloc:
1350 option = 0;
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
1356 mopt->localalloc_opt = option;
1357 break;
1358 case Opt_localflocks:
1359 /*
1360 * Changing this during remount could race
1361 * flock() requests, or "unbalance" existing
1362 * ones (e.g., a lock is taken in one mode but
1363 * dropped in the other). If users care enough
1364 * to flip locking modes during remount, we
1365 * could add a "local" flag to individual
1366 * flock structures for proper tracking of
1367 * state.
1368 */
1369 if (!is_remount)
1370 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1371 break;
1372 case Opt_stack:
1373 /* Check both that the option we were passed
1374 * is of the right length and that it is a proper
1375 * string of the right length.
1376 */
1377 if (((args[0].to - args[0].from) !=
1378 OCFS2_STACK_LABEL_LEN) ||
1379 (strnlen(args[0].from,
1380 OCFS2_STACK_LABEL_LEN) !=
1381 OCFS2_STACK_LABEL_LEN)) {
1382 mlog(ML_ERROR,
1383 "Invalid cluster_stack option\n");
1384 status = 0;
1385 goto bail;
1386 }
1387 memcpy(mopt->cluster_stack, args[0].from,
1388 OCFS2_STACK_LABEL_LEN);
1389 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1390 break;
1391 case Opt_inode64:
1392 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1393 break;
1394 case Opt_usrquota:
1395 /* We check only on remount, otherwise features
1396 * aren't yet initialized. */
1397 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1398 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1399 mlog(ML_ERROR, "User quota requested but "
1400 "filesystem feature is not set\n");
1401 status = 0;
1402 goto bail;
1403 }
1404 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1405 break;
1406 case Opt_grpquota:
1407 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1408 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1409 mlog(ML_ERROR, "Group quota requested but "
1410 "filesystem feature is not set\n");
1411 status = 0;
1412 goto bail;
1413 }
1414 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1415 break;
1416 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1417 case Opt_acl:
1418 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1419 break;
1420 case Opt_noacl:
1421 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1422 break;
1423 #else
1424 case Opt_acl:
1425 case Opt_noacl:
1426 printk(KERN_INFO "ocfs2 (no)acl options not supported\n");
1427 break;
1428 #endif
1429 default:
1430 mlog(ML_ERROR,
1431 "Unrecognized mount option \"%s\" "
1432 "or missing value\n", p);
1433 status = 0;
1434 goto bail;
1435 }
1436 }
1437
1438 status = 1;
1439
1440 bail:
1441 mlog_exit(status);
1442 return status;
1443 }
1444
1445 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1446 {
1447 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1448 unsigned long opts = osb->s_mount_opt;
1449 unsigned int local_alloc_megs;
1450
1451 if (opts & OCFS2_MOUNT_HB_LOCAL)
1452 seq_printf(s, ",_netdev,heartbeat=local");
1453 else
1454 seq_printf(s, ",heartbeat=none");
1455
1456 if (opts & OCFS2_MOUNT_NOINTR)
1457 seq_printf(s, ",nointr");
1458
1459 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1460 seq_printf(s, ",data=writeback");
1461 else
1462 seq_printf(s, ",data=ordered");
1463
1464 if (opts & OCFS2_MOUNT_BARRIER)
1465 seq_printf(s, ",barrier=1");
1466
1467 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1468 seq_printf(s, ",errors=panic");
1469 else
1470 seq_printf(s, ",errors=remount-ro");
1471
1472 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1473 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1474
1475 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1476 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1477
1478 if (osb->osb_commit_interval)
1479 seq_printf(s, ",commit=%u",
1480 (unsigned) (osb->osb_commit_interval / HZ));
1481
1482 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1483 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1484 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1485
1486 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1487 seq_printf(s, ",localflocks,");
1488
1489 if (osb->osb_cluster_stack[0])
1490 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1491 osb->osb_cluster_stack);
1492 if (opts & OCFS2_MOUNT_USRQUOTA)
1493 seq_printf(s, ",usrquota");
1494 if (opts & OCFS2_MOUNT_GRPQUOTA)
1495 seq_printf(s, ",grpquota");
1496
1497 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1498 seq_printf(s, ",nouser_xattr");
1499 else
1500 seq_printf(s, ",user_xattr");
1501
1502 if (opts & OCFS2_MOUNT_INODE64)
1503 seq_printf(s, ",inode64");
1504
1505 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1506 if (opts & OCFS2_MOUNT_POSIX_ACL)
1507 seq_printf(s, ",acl");
1508 else
1509 seq_printf(s, ",noacl");
1510 #endif
1511
1512 return 0;
1513 }
1514
1515 static int __init ocfs2_init(void)
1516 {
1517 int status;
1518
1519 mlog_entry_void();
1520
1521 ocfs2_print_version();
1522
1523 status = init_ocfs2_uptodate_cache();
1524 if (status < 0) {
1525 mlog_errno(status);
1526 goto leave;
1527 }
1528
1529 status = ocfs2_initialize_mem_caches();
1530 if (status < 0) {
1531 mlog_errno(status);
1532 goto leave;
1533 }
1534
1535 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1536 if (!ocfs2_wq) {
1537 status = -ENOMEM;
1538 goto leave;
1539 }
1540
1541 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1542 if (!ocfs2_debugfs_root) {
1543 status = -EFAULT;
1544 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1545 }
1546
1547 status = ocfs2_quota_setup();
1548 if (status)
1549 goto leave;
1550
1551 ocfs2_set_locking_protocol();
1552
1553 status = register_quota_format(&ocfs2_quota_format);
1554 leave:
1555 if (status < 0) {
1556 ocfs2_quota_shutdown();
1557 ocfs2_free_mem_caches();
1558 exit_ocfs2_uptodate_cache();
1559 }
1560
1561 mlog_exit(status);
1562
1563 if (status >= 0) {
1564 return register_filesystem(&ocfs2_fs_type);
1565 } else
1566 return -1;
1567 }
1568
1569 static void __exit ocfs2_exit(void)
1570 {
1571 mlog_entry_void();
1572
1573 ocfs2_quota_shutdown();
1574
1575 if (ocfs2_wq) {
1576 flush_workqueue(ocfs2_wq);
1577 destroy_workqueue(ocfs2_wq);
1578 }
1579
1580 unregister_quota_format(&ocfs2_quota_format);
1581
1582 debugfs_remove(ocfs2_debugfs_root);
1583
1584 ocfs2_free_mem_caches();
1585
1586 unregister_filesystem(&ocfs2_fs_type);
1587
1588 exit_ocfs2_uptodate_cache();
1589
1590 mlog_exit_void();
1591 }
1592
1593 static void ocfs2_put_super(struct super_block *sb)
1594 {
1595 mlog_entry("(0x%p)\n", sb);
1596
1597 lock_kernel();
1598
1599 ocfs2_sync_blockdev(sb);
1600 ocfs2_dismount_volume(sb, 0);
1601
1602 unlock_kernel();
1603
1604 mlog_exit_void();
1605 }
1606
1607 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1608 {
1609 struct ocfs2_super *osb;
1610 u32 numbits, freebits;
1611 int status;
1612 struct ocfs2_dinode *bm_lock;
1613 struct buffer_head *bh = NULL;
1614 struct inode *inode = NULL;
1615
1616 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1617
1618 osb = OCFS2_SB(dentry->d_sb);
1619
1620 inode = ocfs2_get_system_file_inode(osb,
1621 GLOBAL_BITMAP_SYSTEM_INODE,
1622 OCFS2_INVALID_SLOT);
1623 if (!inode) {
1624 mlog(ML_ERROR, "failed to get bitmap inode\n");
1625 status = -EIO;
1626 goto bail;
1627 }
1628
1629 status = ocfs2_inode_lock(inode, &bh, 0);
1630 if (status < 0) {
1631 mlog_errno(status);
1632 goto bail;
1633 }
1634
1635 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1636
1637 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1638 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1639
1640 buf->f_type = OCFS2_SUPER_MAGIC;
1641 buf->f_bsize = dentry->d_sb->s_blocksize;
1642 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1643 buf->f_blocks = ((sector_t) numbits) *
1644 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1645 buf->f_bfree = ((sector_t) freebits) *
1646 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1647 buf->f_bavail = buf->f_bfree;
1648 buf->f_files = numbits;
1649 buf->f_ffree = freebits;
1650 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1651 & 0xFFFFFFFFUL;
1652 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1653 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1654
1655 brelse(bh);
1656
1657 ocfs2_inode_unlock(inode, 0);
1658 status = 0;
1659 bail:
1660 if (inode)
1661 iput(inode);
1662
1663 mlog_exit(status);
1664
1665 return status;
1666 }
1667
1668 static void ocfs2_inode_init_once(void *data)
1669 {
1670 struct ocfs2_inode_info *oi = data;
1671
1672 oi->ip_flags = 0;
1673 oi->ip_open_count = 0;
1674 spin_lock_init(&oi->ip_lock);
1675 ocfs2_extent_map_init(&oi->vfs_inode);
1676 INIT_LIST_HEAD(&oi->ip_io_markers);
1677 oi->ip_dir_start_lookup = 0;
1678
1679 init_rwsem(&oi->ip_alloc_sem);
1680 init_rwsem(&oi->ip_xattr_sem);
1681 mutex_init(&oi->ip_io_mutex);
1682
1683 oi->ip_blkno = 0ULL;
1684 oi->ip_clusters = 0;
1685
1686 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1687 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1688 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1689
1690 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1691 &ocfs2_inode_caching_ops);
1692
1693 inode_init_once(&oi->vfs_inode);
1694 }
1695
1696 static int ocfs2_initialize_mem_caches(void)
1697 {
1698 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1699 sizeof(struct ocfs2_inode_info),
1700 0,
1701 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1702 SLAB_MEM_SPREAD),
1703 ocfs2_inode_init_once);
1704 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1705 sizeof(struct ocfs2_dquot),
1706 0,
1707 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1708 SLAB_MEM_SPREAD),
1709 NULL);
1710 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1711 sizeof(struct ocfs2_quota_chunk),
1712 0,
1713 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1714 NULL);
1715 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1716 !ocfs2_qf_chunk_cachep) {
1717 if (ocfs2_inode_cachep)
1718 kmem_cache_destroy(ocfs2_inode_cachep);
1719 if (ocfs2_dquot_cachep)
1720 kmem_cache_destroy(ocfs2_dquot_cachep);
1721 if (ocfs2_qf_chunk_cachep)
1722 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1723 return -ENOMEM;
1724 }
1725
1726 return 0;
1727 }
1728
1729 static void ocfs2_free_mem_caches(void)
1730 {
1731 if (ocfs2_inode_cachep)
1732 kmem_cache_destroy(ocfs2_inode_cachep);
1733 ocfs2_inode_cachep = NULL;
1734
1735 if (ocfs2_dquot_cachep)
1736 kmem_cache_destroy(ocfs2_dquot_cachep);
1737 ocfs2_dquot_cachep = NULL;
1738
1739 if (ocfs2_qf_chunk_cachep)
1740 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1741 ocfs2_qf_chunk_cachep = NULL;
1742 }
1743
1744 static int ocfs2_get_sector(struct super_block *sb,
1745 struct buffer_head **bh,
1746 int block,
1747 int sect_size)
1748 {
1749 if (!sb_set_blocksize(sb, sect_size)) {
1750 mlog(ML_ERROR, "unable to set blocksize\n");
1751 return -EIO;
1752 }
1753
1754 *bh = sb_getblk(sb, block);
1755 if (!*bh) {
1756 mlog_errno(-EIO);
1757 return -EIO;
1758 }
1759 lock_buffer(*bh);
1760 if (!buffer_dirty(*bh))
1761 clear_buffer_uptodate(*bh);
1762 unlock_buffer(*bh);
1763 ll_rw_block(READ, 1, bh);
1764 wait_on_buffer(*bh);
1765 if (!buffer_uptodate(*bh)) {
1766 mlog_errno(-EIO);
1767 brelse(*bh);
1768 *bh = NULL;
1769 return -EIO;
1770 }
1771
1772 return 0;
1773 }
1774
1775 static int ocfs2_mount_volume(struct super_block *sb)
1776 {
1777 int status = 0;
1778 int unlock_super = 0;
1779 struct ocfs2_super *osb = OCFS2_SB(sb);
1780
1781 mlog_entry_void();
1782
1783 if (ocfs2_is_hard_readonly(osb))
1784 goto leave;
1785
1786 status = ocfs2_dlm_init(osb);
1787 if (status < 0) {
1788 mlog_errno(status);
1789 goto leave;
1790 }
1791
1792 status = ocfs2_super_lock(osb, 1);
1793 if (status < 0) {
1794 mlog_errno(status);
1795 goto leave;
1796 }
1797 unlock_super = 1;
1798
1799 /* This will load up the node map and add ourselves to it. */
1800 status = ocfs2_find_slot(osb);
1801 if (status < 0) {
1802 mlog_errno(status);
1803 goto leave;
1804 }
1805
1806 /* load all node-local system inodes */
1807 status = ocfs2_init_local_system_inodes(osb);
1808 if (status < 0) {
1809 mlog_errno(status);
1810 goto leave;
1811 }
1812
1813 status = ocfs2_check_volume(osb);
1814 if (status < 0) {
1815 mlog_errno(status);
1816 goto leave;
1817 }
1818
1819 status = ocfs2_truncate_log_init(osb);
1820 if (status < 0)
1821 mlog_errno(status);
1822
1823 leave:
1824 if (unlock_super)
1825 ocfs2_super_unlock(osb, 1);
1826
1827 mlog_exit(status);
1828 return status;
1829 }
1830
1831 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1832 {
1833 int tmp, hangup_needed = 0;
1834 struct ocfs2_super *osb = NULL;
1835 char nodestr[8];
1836
1837 mlog_entry("(0x%p)\n", sb);
1838
1839 BUG_ON(!sb);
1840 osb = OCFS2_SB(sb);
1841 BUG_ON(!osb);
1842
1843 debugfs_remove(osb->osb_ctxt);
1844
1845 /*
1846 * Flush inode dropping work queue so that deletes are
1847 * performed while the filesystem is still working
1848 */
1849 ocfs2_drop_all_dl_inodes(osb);
1850
1851 /* Orphan scan should be stopped as early as possible */
1852 ocfs2_orphan_scan_stop(osb);
1853
1854 ocfs2_disable_quotas(osb);
1855
1856 ocfs2_shutdown_local_alloc(osb);
1857
1858 ocfs2_truncate_log_shutdown(osb);
1859
1860 /* This will disable recovery and flush any recovery work. */
1861 ocfs2_recovery_exit(osb);
1862
1863 ocfs2_journal_shutdown(osb);
1864
1865 ocfs2_sync_blockdev(sb);
1866
1867 ocfs2_purge_refcount_trees(osb);
1868
1869 /* No cluster connection means we've failed during mount, so skip
1870 * all the steps which depended on that to complete. */
1871 if (osb->cconn) {
1872 tmp = ocfs2_super_lock(osb, 1);
1873 if (tmp < 0) {
1874 mlog_errno(tmp);
1875 return;
1876 }
1877 }
1878
1879 if (osb->slot_num != OCFS2_INVALID_SLOT)
1880 ocfs2_put_slot(osb);
1881
1882 if (osb->cconn)
1883 ocfs2_super_unlock(osb, 1);
1884
1885 ocfs2_release_system_inodes(osb);
1886
1887 /*
1888 * If we're dismounting due to mount error, mount.ocfs2 will clean
1889 * up heartbeat. If we're a local mount, there is no heartbeat.
1890 * If we failed before we got a uuid_str yet, we can't stop
1891 * heartbeat. Otherwise, do it.
1892 */
1893 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1894 hangup_needed = 1;
1895
1896 if (osb->cconn)
1897 ocfs2_dlm_shutdown(osb, hangup_needed);
1898
1899 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1900 debugfs_remove(osb->osb_debug_root);
1901
1902 if (hangup_needed)
1903 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1904
1905 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1906
1907 if (ocfs2_mount_local(osb))
1908 snprintf(nodestr, sizeof(nodestr), "local");
1909 else
1910 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1911
1912 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1913 osb->dev_str, nodestr);
1914
1915 ocfs2_delete_osb(osb);
1916 kfree(osb);
1917 sb->s_dev = 0;
1918 sb->s_fs_info = NULL;
1919 }
1920
1921 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1922 unsigned uuid_bytes)
1923 {
1924 int i, ret;
1925 char *ptr;
1926
1927 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1928
1929 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1930 if (osb->uuid_str == NULL)
1931 return -ENOMEM;
1932
1933 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1934 /* print with null */
1935 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1936 if (ret != 2) /* drop super cleans up */
1937 return -EINVAL;
1938 /* then only advance past the last char */
1939 ptr += 2;
1940 }
1941
1942 return 0;
1943 }
1944
1945 static int ocfs2_initialize_super(struct super_block *sb,
1946 struct buffer_head *bh,
1947 int sector_size,
1948 struct ocfs2_blockcheck_stats *stats)
1949 {
1950 int status;
1951 int i, cbits, bbits;
1952 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1953 struct inode *inode = NULL;
1954 struct ocfs2_journal *journal;
1955 __le32 uuid_net_key;
1956 struct ocfs2_super *osb;
1957
1958 mlog_entry_void();
1959
1960 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1961 if (!osb) {
1962 status = -ENOMEM;
1963 mlog_errno(status);
1964 goto bail;
1965 }
1966
1967 sb->s_fs_info = osb;
1968 sb->s_op = &ocfs2_sops;
1969 sb->s_export_op = &ocfs2_export_ops;
1970 sb->s_qcop = &ocfs2_quotactl_ops;
1971 sb->dq_op = &ocfs2_quota_operations;
1972 sb->s_xattr = ocfs2_xattr_handlers;
1973 sb->s_time_gran = 1;
1974 sb->s_flags |= MS_NOATIME;
1975 /* this is needed to support O_LARGEFILE */
1976 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1977 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1978 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1979
1980 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
1981
1982 for (i = 0; i < 3; i++)
1983 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
1984 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1985
1986 osb->sb = sb;
1987 /* Save off for ocfs2_rw_direct */
1988 osb->s_sectsize_bits = blksize_bits(sector_size);
1989 BUG_ON(!osb->s_sectsize_bits);
1990
1991 spin_lock_init(&osb->dc_task_lock);
1992 init_waitqueue_head(&osb->dc_event);
1993 osb->dc_work_sequence = 0;
1994 osb->dc_wake_sequence = 0;
1995 INIT_LIST_HEAD(&osb->blocked_lock_list);
1996 osb->blocked_lock_count = 0;
1997 spin_lock_init(&osb->osb_lock);
1998 spin_lock_init(&osb->osb_xattr_lock);
1999 ocfs2_init_inode_steal_slot(osb);
2000
2001 atomic_set(&osb->alloc_stats.moves, 0);
2002 atomic_set(&osb->alloc_stats.local_data, 0);
2003 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2004 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2005 atomic_set(&osb->alloc_stats.bg_extends, 0);
2006
2007 /* Copy the blockcheck stats from the superblock probe */
2008 osb->osb_ecc_stats = *stats;
2009
2010 ocfs2_init_node_maps(osb);
2011
2012 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2013 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2014
2015 ocfs2_orphan_scan_init(osb);
2016
2017 status = ocfs2_recovery_init(osb);
2018 if (status) {
2019 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2020 mlog_errno(status);
2021 goto bail;
2022 }
2023
2024 init_waitqueue_head(&osb->checkpoint_event);
2025 atomic_set(&osb->needs_checkpoint, 0);
2026
2027 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2028
2029 osb->slot_num = OCFS2_INVALID_SLOT;
2030
2031 osb->s_xattr_inline_size = le16_to_cpu(
2032 di->id2.i_super.s_xattr_inline_size);
2033
2034 osb->local_alloc_state = OCFS2_LA_UNUSED;
2035 osb->local_alloc_bh = NULL;
2036 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2037
2038 init_waitqueue_head(&osb->osb_mount_event);
2039
2040 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2041 if (!osb->vol_label) {
2042 mlog(ML_ERROR, "unable to alloc vol label\n");
2043 status = -ENOMEM;
2044 goto bail;
2045 }
2046
2047 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2048 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2049 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2050 osb->max_slots);
2051 status = -EINVAL;
2052 goto bail;
2053 }
2054 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2055
2056 osb->slot_recovery_generations =
2057 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2058 GFP_KERNEL);
2059 if (!osb->slot_recovery_generations) {
2060 status = -ENOMEM;
2061 mlog_errno(status);
2062 goto bail;
2063 }
2064
2065 init_waitqueue_head(&osb->osb_wipe_event);
2066 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2067 sizeof(*osb->osb_orphan_wipes),
2068 GFP_KERNEL);
2069 if (!osb->osb_orphan_wipes) {
2070 status = -ENOMEM;
2071 mlog_errno(status);
2072 goto bail;
2073 }
2074
2075 osb->osb_rf_lock_tree = RB_ROOT;
2076
2077 osb->s_feature_compat =
2078 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2079 osb->s_feature_ro_compat =
2080 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2081 osb->s_feature_incompat =
2082 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2083
2084 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2085 mlog(ML_ERROR, "couldn't mount because of unsupported "
2086 "optional features (%x).\n", i);
2087 status = -EINVAL;
2088 goto bail;
2089 }
2090 if (!(osb->sb->s_flags & MS_RDONLY) &&
2091 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2092 mlog(ML_ERROR, "couldn't mount RDWR because of "
2093 "unsupported optional features (%x).\n", i);
2094 status = -EINVAL;
2095 goto bail;
2096 }
2097
2098 if (ocfs2_userspace_stack(osb)) {
2099 memcpy(osb->osb_cluster_stack,
2100 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2101 OCFS2_STACK_LABEL_LEN);
2102 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2103 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2104 mlog(ML_ERROR,
2105 "couldn't mount because of an invalid "
2106 "cluster stack label (%s) \n",
2107 osb->osb_cluster_stack);
2108 status = -EINVAL;
2109 goto bail;
2110 }
2111 } else {
2112 /* The empty string is identical with classic tools that
2113 * don't know about s_cluster_info. */
2114 osb->osb_cluster_stack[0] = '\0';
2115 }
2116
2117 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2118
2119 /* FIXME
2120 * This should be done in ocfs2_journal_init(), but unknown
2121 * ordering issues will cause the filesystem to crash.
2122 * If anyone wants to figure out what part of the code
2123 * refers to osb->journal before ocfs2_journal_init() is run,
2124 * be my guest.
2125 */
2126 /* initialize our journal structure */
2127
2128 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2129 if (!journal) {
2130 mlog(ML_ERROR, "unable to alloc journal\n");
2131 status = -ENOMEM;
2132 goto bail;
2133 }
2134 osb->journal = journal;
2135 journal->j_osb = osb;
2136
2137 atomic_set(&journal->j_num_trans, 0);
2138 init_rwsem(&journal->j_trans_barrier);
2139 init_waitqueue_head(&journal->j_checkpointed);
2140 spin_lock_init(&journal->j_lock);
2141 journal->j_trans_id = (unsigned long) 1;
2142 INIT_LIST_HEAD(&journal->j_la_cleanups);
2143 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2144 journal->j_state = OCFS2_JOURNAL_FREE;
2145
2146 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2147 osb->dentry_lock_list = NULL;
2148
2149 /* get some pseudo constants for clustersize bits */
2150 osb->s_clustersize_bits =
2151 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2152 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2153 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2154
2155 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2156 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2157 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2158 osb->s_clustersize);
2159 status = -EINVAL;
2160 goto bail;
2161 }
2162
2163 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
2164 > (u32)~0UL) {
2165 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
2166 "what jbd can address in 32 bits.\n");
2167 status = -EINVAL;
2168 goto bail;
2169 }
2170
2171 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2172 sizeof(di->id2.i_super.s_uuid))) {
2173 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2174 status = -ENOMEM;
2175 goto bail;
2176 }
2177
2178 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2179
2180 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2181 osb->vol_label[63] = '\0';
2182 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2183 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2184 osb->first_cluster_group_blkno =
2185 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2186 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2187 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2188 mlog(0, "vol_label: %s\n", osb->vol_label);
2189 mlog(0, "uuid: %s\n", osb->uuid_str);
2190 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2191 (unsigned long long)osb->root_blkno,
2192 (unsigned long long)osb->system_dir_blkno);
2193
2194 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2195 if (!osb->osb_dlm_debug) {
2196 status = -ENOMEM;
2197 mlog_errno(status);
2198 goto bail;
2199 }
2200
2201 atomic_set(&osb->vol_state, VOLUME_INIT);
2202
2203 /* load root, system_dir, and all global system inodes */
2204 status = ocfs2_init_global_system_inodes(osb);
2205 if (status < 0) {
2206 mlog_errno(status);
2207 goto bail;
2208 }
2209
2210 /*
2211 * global bitmap
2212 */
2213 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2214 OCFS2_INVALID_SLOT);
2215 if (!inode) {
2216 status = -EINVAL;
2217 mlog_errno(status);
2218 goto bail;
2219 }
2220
2221 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2222 iput(inode);
2223
2224 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
2225
2226 status = ocfs2_init_slot_info(osb);
2227 if (status < 0) {
2228 mlog_errno(status);
2229 goto bail;
2230 }
2231
2232 bail:
2233 mlog_exit(status);
2234 return status;
2235 }
2236
2237 /*
2238 * will return: -EAGAIN if it is ok to keep searching for superblocks
2239 * -EINVAL if there is a bad superblock
2240 * 0 on success
2241 */
2242 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2243 struct buffer_head *bh,
2244 u32 blksz,
2245 struct ocfs2_blockcheck_stats *stats)
2246 {
2247 int status = -EAGAIN;
2248
2249 mlog_entry_void();
2250
2251 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2252 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2253 /* We have to do a raw check of the feature here */
2254 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2255 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2256 status = ocfs2_block_check_validate(bh->b_data,
2257 bh->b_size,
2258 &di->i_check,
2259 stats);
2260 if (status)
2261 goto out;
2262 }
2263 status = -EINVAL;
2264 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2265 mlog(ML_ERROR, "found superblock with incorrect block "
2266 "size: found %u, should be %u\n",
2267 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2268 blksz);
2269 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2270 OCFS2_MAJOR_REV_LEVEL ||
2271 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2272 OCFS2_MINOR_REV_LEVEL) {
2273 mlog(ML_ERROR, "found superblock with bad version: "
2274 "found %u.%u, should be %u.%u\n",
2275 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2276 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2277 OCFS2_MAJOR_REV_LEVEL,
2278 OCFS2_MINOR_REV_LEVEL);
2279 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2280 mlog(ML_ERROR, "bad block number on superblock: "
2281 "found %llu, should be %llu\n",
2282 (unsigned long long)le64_to_cpu(di->i_blkno),
2283 (unsigned long long)bh->b_blocknr);
2284 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2285 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2286 mlog(ML_ERROR, "bad cluster size found: %u\n",
2287 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2288 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2289 mlog(ML_ERROR, "bad root_blkno: 0\n");
2290 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2291 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2292 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2293 mlog(ML_ERROR,
2294 "Superblock slots found greater than file system "
2295 "maximum: found %u, max %u\n",
2296 le16_to_cpu(di->id2.i_super.s_max_slots),
2297 OCFS2_MAX_SLOTS);
2298 } else {
2299 /* found it! */
2300 status = 0;
2301 }
2302 }
2303
2304 out:
2305 mlog_exit(status);
2306 return status;
2307 }
2308
2309 static int ocfs2_check_volume(struct ocfs2_super *osb)
2310 {
2311 int status;
2312 int dirty;
2313 int local;
2314 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2315 * recover
2316 * ourselves. */
2317
2318 mlog_entry_void();
2319
2320 /* Init our journal object. */
2321 status = ocfs2_journal_init(osb->journal, &dirty);
2322 if (status < 0) {
2323 mlog(ML_ERROR, "Could not initialize journal!\n");
2324 goto finally;
2325 }
2326
2327 /* If the journal was unmounted cleanly then we don't want to
2328 * recover anything. Otherwise, journal_load will do that
2329 * dirty work for us :) */
2330 if (!dirty) {
2331 status = ocfs2_journal_wipe(osb->journal, 0);
2332 if (status < 0) {
2333 mlog_errno(status);
2334 goto finally;
2335 }
2336 } else {
2337 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2338 "recovering volume.\n");
2339 }
2340
2341 local = ocfs2_mount_local(osb);
2342
2343 /* will play back anything left in the journal. */
2344 status = ocfs2_journal_load(osb->journal, local, dirty);
2345 if (status < 0) {
2346 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2347 goto finally;
2348 }
2349
2350 if (dirty) {
2351 /* recover my local alloc if we didn't unmount cleanly. */
2352 status = ocfs2_begin_local_alloc_recovery(osb,
2353 osb->slot_num,
2354 &local_alloc);
2355 if (status < 0) {
2356 mlog_errno(status);
2357 goto finally;
2358 }
2359 /* we complete the recovery process after we've marked
2360 * ourselves as mounted. */
2361 }
2362
2363 mlog(0, "Journal loaded.\n");
2364
2365 status = ocfs2_load_local_alloc(osb);
2366 if (status < 0) {
2367 mlog_errno(status);
2368 goto finally;
2369 }
2370
2371 if (dirty) {
2372 /* Recovery will be completed after we've mounted the
2373 * rest of the volume. */
2374 osb->dirty = 1;
2375 osb->local_alloc_copy = local_alloc;
2376 local_alloc = NULL;
2377 }
2378
2379 /* go through each journal, trylock it and if you get the
2380 * lock, and it's marked as dirty, set the bit in the recover
2381 * map and launch a recovery thread for it. */
2382 status = ocfs2_mark_dead_nodes(osb);
2383 if (status < 0) {
2384 mlog_errno(status);
2385 goto finally;
2386 }
2387
2388 status = ocfs2_compute_replay_slots(osb);
2389 if (status < 0)
2390 mlog_errno(status);
2391
2392 finally:
2393 if (local_alloc)
2394 kfree(local_alloc);
2395
2396 mlog_exit(status);
2397 return status;
2398 }
2399
2400 /*
2401 * The routine gets called from dismount or close whenever a dismount on
2402 * volume is requested and the osb open count becomes 1.
2403 * It will remove the osb from the global list and also free up all the
2404 * initialized resources and fileobject.
2405 */
2406 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2407 {
2408 mlog_entry_void();
2409
2410 /* This function assumes that the caller has the main osb resource */
2411
2412 ocfs2_free_slot_info(osb);
2413
2414 kfree(osb->osb_orphan_wipes);
2415 kfree(osb->slot_recovery_generations);
2416 /* FIXME
2417 * This belongs in journal shutdown, but because we have to
2418 * allocate osb->journal at the start of ocfs2_initalize_osb(),
2419 * we free it here.
2420 */
2421 kfree(osb->journal);
2422 if (osb->local_alloc_copy)
2423 kfree(osb->local_alloc_copy);
2424 kfree(osb->uuid_str);
2425 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2426 memset(osb, 0, sizeof(struct ocfs2_super));
2427
2428 mlog_exit_void();
2429 }
2430
2431 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2432 * panic(). We do not support continue-on-error operation. */
2433 static void ocfs2_handle_error(struct super_block *sb)
2434 {
2435 struct ocfs2_super *osb = OCFS2_SB(sb);
2436
2437 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2438 panic("OCFS2: (device %s): panic forced after error\n",
2439 sb->s_id);
2440
2441 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2442
2443 if (sb->s_flags & MS_RDONLY &&
2444 (ocfs2_is_soft_readonly(osb) ||
2445 ocfs2_is_hard_readonly(osb)))
2446 return;
2447
2448 printk(KERN_CRIT "File system is now read-only due to the potential "
2449 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2450 "system is unmounted.\n");
2451 sb->s_flags |= MS_RDONLY;
2452 ocfs2_set_ro_flag(osb, 0);
2453 }
2454
2455 static char error_buf[1024];
2456
2457 void __ocfs2_error(struct super_block *sb,
2458 const char *function,
2459 const char *fmt, ...)
2460 {
2461 va_list args;
2462
2463 va_start(args, fmt);
2464 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2465 va_end(args);
2466
2467 /* Not using mlog here because we want to show the actual
2468 * function the error came from. */
2469 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2470 sb->s_id, function, error_buf);
2471
2472 ocfs2_handle_error(sb);
2473 }
2474
2475 /* Handle critical errors. This is intentionally more drastic than
2476 * ocfs2_handle_error, so we only use for things like journal errors,
2477 * etc. */
2478 void __ocfs2_abort(struct super_block* sb,
2479 const char *function,
2480 const char *fmt, ...)
2481 {
2482 va_list args;
2483
2484 va_start(args, fmt);
2485 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2486 va_end(args);
2487
2488 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2489 sb->s_id, function, error_buf);
2490
2491 /* We don't have the cluster support yet to go straight to
2492 * hard readonly in here. Until then, we want to keep
2493 * ocfs2_abort() so that we can at least mark critical
2494 * errors.
2495 *
2496 * TODO: This should abort the journal and alert other nodes
2497 * that our slot needs recovery. */
2498
2499 /* Force a panic(). This stinks, but it's better than letting
2500 * things continue without having a proper hard readonly
2501 * here. */
2502 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2503 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2504 ocfs2_handle_error(sb);
2505 }
2506
2507 module_init(ocfs2_init);
2508 module_exit(ocfs2_exit);
kernel source for telekom puls (alcatel/mediatek)