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drm/radeon/kms: memset the allocated framebuffer before using it.
[linux-2.6/mini2440.git] / fs / ocfs2 / super.c
blobb0ee0fdf799a514c9555b34f4983c734825badde
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/utsname.h>
32 #include <linux/init.h>
33 #include <linux/random.h>
34 #include <linux/statfs.h>
35 #include <linux/moduleparam.h>
36 #include <linux/blkdev.h>
37 #include <linux/socket.h>
38 #include <linux/inet.h>
39 #include <linux/parser.h>
40 #include <linux/crc32.h>
41 #include <linux/debugfs.h>
42 #include <linux/mount.h>
43 #include <linux/seq_file.h>
44 #include <linux/quotaops.h>
45 #include <linux/smp_lock.h>
46
47 #define MLOG_MASK_PREFIX ML_SUPER
48 #include <cluster/masklog.h>
49
50 #include "ocfs2.h"
51
52 /* this should be the only file to include a version 1 header */
53 #include "ocfs1_fs_compat.h"
54
55 #include "alloc.h"
56 #include "blockcheck.h"
57 #include "dlmglue.h"
58 #include "export.h"
59 #include "extent_map.h"
60 #include "heartbeat.h"
61 #include "inode.h"
62 #include "journal.h"
63 #include "localalloc.h"
64 #include "namei.h"
65 #include "slot_map.h"
66 #include "super.h"
67 #include "sysfile.h"
68 #include "uptodate.h"
69 #include "ver.h"
70 #include "xattr.h"
71 #include "quota.h"
72
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 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 goto bail;
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 status = ocfs2_verify_volume(di, *bh, blksize, stats);
782 if (status >= 0)
783 goto bail;
784 brelse(*bh);
785 *bh = NULL;
786 if (status != -EAGAIN)
787 break;
788 }
789
790 bail:
791 return status;
792 }
793
794 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
795 {
796 if (ocfs2_mount_local(osb)) {
797 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
798 mlog(ML_ERROR, "Cannot heartbeat on a locally "
799 "mounted device.\n");
800 return -EINVAL;
801 }
802 }
803
804 if (ocfs2_userspace_stack(osb)) {
805 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
806 mlog(ML_ERROR, "Userspace stack expected, but "
807 "o2cb heartbeat arguments passed to mount\n");
808 return -EINVAL;
809 }
810 }
811
812 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
813 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
814 !ocfs2_userspace_stack(osb)) {
815 mlog(ML_ERROR, "Heartbeat has to be started to mount "
816 "a read-write clustered device.\n");
817 return -EINVAL;
818 }
819 }
820
821 return 0;
822 }
823
824 /*
825 * If we're using a userspace stack, mount should have passed
826 * a name that matches the disk. If not, mount should not
827 * have passed a stack.
828 */
829 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
830 struct mount_options *mopt)
831 {
832 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
833 mlog(ML_ERROR,
834 "cluster stack passed to mount, but this filesystem "
835 "does not support it\n");
836 return -EINVAL;
837 }
838
839 if (ocfs2_userspace_stack(osb) &&
840 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
841 OCFS2_STACK_LABEL_LEN)) {
842 mlog(ML_ERROR,
843 "cluster stack passed to mount (\"%s\") does not "
844 "match the filesystem (\"%s\")\n",
845 mopt->cluster_stack,
846 osb->osb_cluster_stack);
847 return -EINVAL;
848 }
849
850 return 0;
851 }
852
853 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
854 {
855 int type;
856 struct super_block *sb = osb->sb;
857 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
858 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
859 int status = 0;
860
861 for (type = 0; type < MAXQUOTAS; type++) {
862 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
863 continue;
864 if (unsuspend)
865 status = vfs_quota_enable(
866 sb_dqopt(sb)->files[type],
867 type, QFMT_OCFS2,
868 DQUOT_SUSPENDED);
869 else
870 status = vfs_quota_disable(sb, type,
871 DQUOT_SUSPENDED);
872 if (status < 0)
873 break;
874 }
875 if (status < 0)
876 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
877 "remount (error = %d).\n", status);
878 return status;
879 }
880
881 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
882 {
883 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
884 struct super_block *sb = osb->sb;
885 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
886 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
887 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
888 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
889 int status;
890 int type;
891
892 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
893 for (type = 0; type < MAXQUOTAS; type++) {
894 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
895 continue;
896 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
897 osb->slot_num);
898 if (!inode[type]) {
899 status = -ENOENT;
900 goto out_quota_off;
901 }
902 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2,
903 DQUOT_USAGE_ENABLED);
904 if (status < 0)
905 goto out_quota_off;
906 }
907
908 for (type = 0; type < MAXQUOTAS; type++)
909 iput(inode[type]);
910 return 0;
911 out_quota_off:
912 ocfs2_disable_quotas(osb);
913 for (type = 0; type < MAXQUOTAS; type++)
914 iput(inode[type]);
915 mlog_errno(status);
916 return status;
917 }
918
919 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
920 {
921 int type;
922 struct inode *inode;
923 struct super_block *sb = osb->sb;
924
925 /* We mostly ignore errors in this function because there's not much
926 * we can do when we see them */
927 for (type = 0; type < MAXQUOTAS; type++) {
928 if (!sb_has_quota_loaded(sb, type))
929 continue;
930 inode = igrab(sb->s_dquot.files[type]);
931 /* Turn off quotas. This will remove all dquot structures from
932 * memory and so they will be automatically synced to global
933 * quota files */
934 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED |
935 DQUOT_LIMITS_ENABLED);
936 if (!inode)
937 continue;
938 iput(inode);
939 }
940 }
941
942 /* Handle quota on quotactl */
943 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
944 char *path, int remount)
945 {
946 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
947 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
948
949 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
950 return -EINVAL;
951
952 if (remount)
953 return 0; /* Just ignore it has been handled in
954 * ocfs2_remount() */
955 return vfs_quota_enable(sb_dqopt(sb)->files[type], type,
956 format_id, DQUOT_LIMITS_ENABLED);
957 }
958
959 /* Handle quota off quotactl */
960 static int ocfs2_quota_off(struct super_block *sb, int type, int remount)
961 {
962 if (remount)
963 return 0; /* Ignore now and handle later in
964 * ocfs2_remount() */
965 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
966 }
967
968 static struct quotactl_ops ocfs2_quotactl_ops = {
969 .quota_on = ocfs2_quota_on,
970 .quota_off = ocfs2_quota_off,
971 .quota_sync = vfs_quota_sync,
972 .get_info = vfs_get_dqinfo,
973 .set_info = vfs_set_dqinfo,
974 .get_dqblk = vfs_get_dqblk,
975 .set_dqblk = vfs_set_dqblk,
976 };
977
978 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
979 {
980 struct dentry *root;
981 int status, sector_size;
982 struct mount_options parsed_options;
983 struct inode *inode = NULL;
984 struct ocfs2_super *osb = NULL;
985 struct buffer_head *bh = NULL;
986 char nodestr[8];
987 struct ocfs2_blockcheck_stats stats;
988
989 mlog_entry("%p, %p, %i", sb, data, silent);
990
991 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
992 status = -EINVAL;
993 goto read_super_error;
994 }
995
996 /* probe for superblock */
997 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
998 if (status < 0) {
999 mlog(ML_ERROR, "superblock probe failed!\n");
1000 goto read_super_error;
1001 }
1002
1003 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1004 osb = OCFS2_SB(sb);
1005 if (status < 0) {
1006 mlog_errno(status);
1007 goto read_super_error;
1008 }
1009 brelse(bh);
1010 bh = NULL;
1011
1012 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
1013 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1014
1015 osb->s_mount_opt = parsed_options.mount_opt;
1016 osb->s_atime_quantum = parsed_options.atime_quantum;
1017 osb->preferred_slot = parsed_options.slot;
1018 osb->osb_commit_interval = parsed_options.commit_interval;
1019 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
1020 osb->local_alloc_bits = osb->local_alloc_default_bits;
1021 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA &&
1022 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1023 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1024 status = -EINVAL;
1025 mlog(ML_ERROR, "User quotas were requested, but this "
1026 "filesystem does not have the feature enabled.\n");
1027 goto read_super_error;
1028 }
1029 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1030 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1031 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1032 status = -EINVAL;
1033 mlog(ML_ERROR, "Group quotas were requested, but this "
1034 "filesystem does not have the feature enabled.\n");
1035 goto read_super_error;
1036 }
1037
1038 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1039 if (status)
1040 goto read_super_error;
1041
1042 sb->s_magic = OCFS2_SUPER_MAGIC;
1043
1044 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1045 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1046
1047 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1048 * heartbeat=none */
1049 if (bdev_read_only(sb->s_bdev)) {
1050 if (!(sb->s_flags & MS_RDONLY)) {
1051 status = -EACCES;
1052 mlog(ML_ERROR, "Readonly device detected but readonly "
1053 "mount was not specified.\n");
1054 goto read_super_error;
1055 }
1056
1057 /* You should not be able to start a local heartbeat
1058 * on a readonly device. */
1059 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1060 status = -EROFS;
1061 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1062 "device.\n");
1063 goto read_super_error;
1064 }
1065
1066 status = ocfs2_check_journals_nolocks(osb);
1067 if (status < 0) {
1068 if (status == -EROFS)
1069 mlog(ML_ERROR, "Recovery required on readonly "
1070 "file system, but write access is "
1071 "unavailable.\n");
1072 else
1073 mlog_errno(status);
1074 goto read_super_error;
1075 }
1076
1077 ocfs2_set_ro_flag(osb, 1);
1078
1079 printk(KERN_NOTICE "Readonly device detected. No cluster "
1080 "services will be utilized for this mount. Recovery "
1081 "will be skipped.\n");
1082 }
1083
1084 if (!ocfs2_is_hard_readonly(osb)) {
1085 if (sb->s_flags & MS_RDONLY)
1086 ocfs2_set_ro_flag(osb, 0);
1087 }
1088
1089 status = ocfs2_verify_heartbeat(osb);
1090 if (status < 0) {
1091 mlog_errno(status);
1092 goto read_super_error;
1093 }
1094
1095 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1096 ocfs2_debugfs_root);
1097 if (!osb->osb_debug_root) {
1098 status = -EINVAL;
1099 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1100 goto read_super_error;
1101 }
1102
1103 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1104 osb->osb_debug_root,
1105 osb,
1106 &ocfs2_osb_debug_fops);
1107 if (!osb->osb_ctxt) {
1108 status = -EINVAL;
1109 mlog_errno(status);
1110 goto read_super_error;
1111 }
1112
1113 if (ocfs2_meta_ecc(osb)) {
1114 status = ocfs2_blockcheck_stats_debugfs_install(
1115 &osb->osb_ecc_stats,
1116 osb->osb_debug_root);
1117 if (status) {
1118 mlog(ML_ERROR,
1119 "Unable to create blockcheck statistics "
1120 "files\n");
1121 goto read_super_error;
1122 }
1123 }
1124
1125 status = ocfs2_mount_volume(sb);
1126 if (osb->root_inode)
1127 inode = igrab(osb->root_inode);
1128
1129 if (status < 0)
1130 goto read_super_error;
1131
1132 if (!inode) {
1133 status = -EIO;
1134 mlog_errno(status);
1135 goto read_super_error;
1136 }
1137
1138 root = d_alloc_root(inode);
1139 if (!root) {
1140 status = -ENOMEM;
1141 mlog_errno(status);
1142 goto read_super_error;
1143 }
1144
1145 sb->s_root = root;
1146
1147 ocfs2_complete_mount_recovery(osb);
1148
1149 if (ocfs2_mount_local(osb))
1150 snprintf(nodestr, sizeof(nodestr), "local");
1151 else
1152 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1153
1154 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1155 "with %s data mode.\n",
1156 osb->dev_str, nodestr, osb->slot_num,
1157 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1158 "ordered");
1159
1160 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1161 wake_up(&osb->osb_mount_event);
1162
1163 /* Now we can initialize quotas because we can afford to wait
1164 * for cluster locks recovery now. That also means that truncation
1165 * log recovery can happen but that waits for proper quota setup */
1166 if (!(sb->s_flags & MS_RDONLY)) {
1167 status = ocfs2_enable_quotas(osb);
1168 if (status < 0) {
1169 /* We have to err-out specially here because
1170 * s_root is already set */
1171 mlog_errno(status);
1172 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1173 wake_up(&osb->osb_mount_event);
1174 mlog_exit(status);
1175 return status;
1176 }
1177 }
1178
1179 ocfs2_complete_quota_recovery(osb);
1180
1181 /* Now we wake up again for processes waiting for quotas */
1182 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1183 wake_up(&osb->osb_mount_event);
1184
1185 /* Start this when the mount is almost sure of being successful */
1186 ocfs2_orphan_scan_start(osb);
1187
1188 mlog_exit(status);
1189 return status;
1190
1191 read_super_error:
1192 brelse(bh);
1193
1194 if (inode)
1195 iput(inode);
1196
1197 if (osb) {
1198 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1199 wake_up(&osb->osb_mount_event);
1200 ocfs2_dismount_volume(sb, 1);
1201 }
1202
1203 mlog_exit(status);
1204 return status;
1205 }
1206
1207 static int ocfs2_get_sb(struct file_system_type *fs_type,
1208 int flags,
1209 const char *dev_name,
1210 void *data,
1211 struct vfsmount *mnt)
1212 {
1213 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1214 mnt);
1215 }
1216
1217 static void ocfs2_kill_sb(struct super_block *sb)
1218 {
1219 struct ocfs2_super *osb = OCFS2_SB(sb);
1220
1221 /* Prevent further queueing of inode drop events */
1222 spin_lock(&dentry_list_lock);
1223 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1224 spin_unlock(&dentry_list_lock);
1225 /* Wait for work to finish and/or remove it */
1226 cancel_work_sync(&osb->dentry_lock_work);
1227
1228 kill_block_super(sb);
1229 }
1230
1231 static struct file_system_type ocfs2_fs_type = {
1232 .owner = THIS_MODULE,
1233 .name = "ocfs2",
1234 .get_sb = ocfs2_get_sb, /* is this called when we mount
1235 * the fs? */
1236 .kill_sb = ocfs2_kill_sb,
1237
1238 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1239 .next = NULL
1240 };
1241
1242 static int ocfs2_parse_options(struct super_block *sb,
1243 char *options,
1244 struct mount_options *mopt,
1245 int is_remount)
1246 {
1247 int status;
1248 char *p;
1249
1250 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1251 options ? options : "(none)");
1252
1253 mopt->commit_interval = 0;
1254 mopt->mount_opt = 0;
1255 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1256 mopt->slot = OCFS2_INVALID_SLOT;
1257 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
1258 mopt->cluster_stack[0] = '\0';
1259
1260 if (!options) {
1261 status = 1;
1262 goto bail;
1263 }
1264
1265 while ((p = strsep(&options, ",")) != NULL) {
1266 int token, option;
1267 substring_t args[MAX_OPT_ARGS];
1268
1269 if (!*p)
1270 continue;
1271
1272 token = match_token(p, tokens, args);
1273 switch (token) {
1274 case Opt_hb_local:
1275 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1276 break;
1277 case Opt_hb_none:
1278 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
1279 break;
1280 case Opt_barrier:
1281 if (match_int(&args[0], &option)) {
1282 status = 0;
1283 goto bail;
1284 }
1285 if (option)
1286 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1287 else
1288 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1289 break;
1290 case Opt_intr:
1291 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1292 break;
1293 case Opt_nointr:
1294 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1295 break;
1296 case Opt_err_panic:
1297 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1298 break;
1299 case Opt_err_ro:
1300 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1301 break;
1302 case Opt_data_ordered:
1303 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1304 break;
1305 case Opt_data_writeback:
1306 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1307 break;
1308 case Opt_user_xattr:
1309 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1310 break;
1311 case Opt_nouser_xattr:
1312 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1313 break;
1314 case Opt_atime_quantum:
1315 if (match_int(&args[0], &option)) {
1316 status = 0;
1317 goto bail;
1318 }
1319 if (option >= 0)
1320 mopt->atime_quantum = option;
1321 break;
1322 case Opt_slot:
1323 option = 0;
1324 if (match_int(&args[0], &option)) {
1325 status = 0;
1326 goto bail;
1327 }
1328 if (option)
1329 mopt->slot = (s16)option;
1330 break;
1331 case Opt_commit:
1332 option = 0;
1333 if (match_int(&args[0], &option)) {
1334 status = 0;
1335 goto bail;
1336 }
1337 if (option < 0)
1338 return 0;
1339 if (option == 0)
1340 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1341 mopt->commit_interval = HZ * option;
1342 break;
1343 case Opt_localalloc:
1344 option = 0;
1345 if (match_int(&args[0], &option)) {
1346 status = 0;
1347 goto bail;
1348 }
1349 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
1350 mopt->localalloc_opt = option;
1351 break;
1352 case Opt_localflocks:
1353 /*
1354 * Changing this during remount could race
1355 * flock() requests, or "unbalance" existing
1356 * ones (e.g., a lock is taken in one mode but
1357 * dropped in the other). If users care enough
1358 * to flip locking modes during remount, we
1359 * could add a "local" flag to individual
1360 * flock structures for proper tracking of
1361 * state.
1362 */
1363 if (!is_remount)
1364 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1365 break;
1366 case Opt_stack:
1367 /* Check both that the option we were passed
1368 * is of the right length and that it is a proper
1369 * string of the right length.
1370 */
1371 if (((args[0].to - args[0].from) !=
1372 OCFS2_STACK_LABEL_LEN) ||
1373 (strnlen(args[0].from,
1374 OCFS2_STACK_LABEL_LEN) !=
1375 OCFS2_STACK_LABEL_LEN)) {
1376 mlog(ML_ERROR,
1377 "Invalid cluster_stack option\n");
1378 status = 0;
1379 goto bail;
1380 }
1381 memcpy(mopt->cluster_stack, args[0].from,
1382 OCFS2_STACK_LABEL_LEN);
1383 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1384 break;
1385 case Opt_inode64:
1386 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1387 break;
1388 case Opt_usrquota:
1389 /* We check only on remount, otherwise features
1390 * aren't yet initialized. */
1391 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1392 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1393 mlog(ML_ERROR, "User quota requested but "
1394 "filesystem feature is not set\n");
1395 status = 0;
1396 goto bail;
1397 }
1398 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1399 break;
1400 case Opt_grpquota:
1401 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1402 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1403 mlog(ML_ERROR, "Group quota requested but "
1404 "filesystem feature is not set\n");
1405 status = 0;
1406 goto bail;
1407 }
1408 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1409 break;
1410 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1411 case Opt_acl:
1412 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1413 break;
1414 case Opt_noacl:
1415 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1416 break;
1417 #else
1418 case Opt_acl:
1419 case Opt_noacl:
1420 printk(KERN_INFO "ocfs2 (no)acl options not supported\n");
1421 break;
1422 #endif
1423 default:
1424 mlog(ML_ERROR,
1425 "Unrecognized mount option \"%s\" "
1426 "or missing value\n", p);
1427 status = 0;
1428 goto bail;
1429 }
1430 }
1431
1432 status = 1;
1433
1434 bail:
1435 mlog_exit(status);
1436 return status;
1437 }
1438
1439 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1440 {
1441 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1442 unsigned long opts = osb->s_mount_opt;
1443 unsigned int local_alloc_megs;
1444
1445 if (opts & OCFS2_MOUNT_HB_LOCAL)
1446 seq_printf(s, ",_netdev,heartbeat=local");
1447 else
1448 seq_printf(s, ",heartbeat=none");
1449
1450 if (opts & OCFS2_MOUNT_NOINTR)
1451 seq_printf(s, ",nointr");
1452
1453 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1454 seq_printf(s, ",data=writeback");
1455 else
1456 seq_printf(s, ",data=ordered");
1457
1458 if (opts & OCFS2_MOUNT_BARRIER)
1459 seq_printf(s, ",barrier=1");
1460
1461 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1462 seq_printf(s, ",errors=panic");
1463 else
1464 seq_printf(s, ",errors=remount-ro");
1465
1466 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1467 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1468
1469 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1470 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1471
1472 if (osb->osb_commit_interval)
1473 seq_printf(s, ",commit=%u",
1474 (unsigned) (osb->osb_commit_interval / HZ));
1475
1476 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1477 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1478 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1479
1480 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1481 seq_printf(s, ",localflocks,");
1482
1483 if (osb->osb_cluster_stack[0])
1484 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1485 osb->osb_cluster_stack);
1486 if (opts & OCFS2_MOUNT_USRQUOTA)
1487 seq_printf(s, ",usrquota");
1488 if (opts & OCFS2_MOUNT_GRPQUOTA)
1489 seq_printf(s, ",grpquota");
1490
1491 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1492 seq_printf(s, ",nouser_xattr");
1493 else
1494 seq_printf(s, ",user_xattr");
1495
1496 if (opts & OCFS2_MOUNT_INODE64)
1497 seq_printf(s, ",inode64");
1498
1499 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1500 if (opts & OCFS2_MOUNT_POSIX_ACL)
1501 seq_printf(s, ",acl");
1502 else
1503 seq_printf(s, ",noacl");
1504 #endif
1505
1506 return 0;
1507 }
1508
1509 static int __init ocfs2_init(void)
1510 {
1511 int status;
1512
1513 mlog_entry_void();
1514
1515 ocfs2_print_version();
1516
1517 status = init_ocfs2_uptodate_cache();
1518 if (status < 0) {
1519 mlog_errno(status);
1520 goto leave;
1521 }
1522
1523 status = ocfs2_initialize_mem_caches();
1524 if (status < 0) {
1525 mlog_errno(status);
1526 goto leave;
1527 }
1528
1529 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1530 if (!ocfs2_wq) {
1531 status = -ENOMEM;
1532 goto leave;
1533 }
1534
1535 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1536 if (!ocfs2_debugfs_root) {
1537 status = -EFAULT;
1538 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1539 }
1540
1541 status = ocfs2_quota_setup();
1542 if (status)
1543 goto leave;
1544
1545 ocfs2_set_locking_protocol();
1546
1547 status = register_quota_format(&ocfs2_quota_format);
1548 leave:
1549 if (status < 0) {
1550 ocfs2_quota_shutdown();
1551 ocfs2_free_mem_caches();
1552 exit_ocfs2_uptodate_cache();
1553 }
1554
1555 mlog_exit(status);
1556
1557 if (status >= 0) {
1558 return register_filesystem(&ocfs2_fs_type);
1559 } else
1560 return -1;
1561 }
1562
1563 static void __exit ocfs2_exit(void)
1564 {
1565 mlog_entry_void();
1566
1567 ocfs2_quota_shutdown();
1568
1569 if (ocfs2_wq) {
1570 flush_workqueue(ocfs2_wq);
1571 destroy_workqueue(ocfs2_wq);
1572 }
1573
1574 unregister_quota_format(&ocfs2_quota_format);
1575
1576 debugfs_remove(ocfs2_debugfs_root);
1577
1578 ocfs2_free_mem_caches();
1579
1580 unregister_filesystem(&ocfs2_fs_type);
1581
1582 exit_ocfs2_uptodate_cache();
1583
1584 mlog_exit_void();
1585 }
1586
1587 static void ocfs2_put_super(struct super_block *sb)
1588 {
1589 mlog_entry("(0x%p)\n", sb);
1590
1591 lock_kernel();
1592
1593 ocfs2_sync_blockdev(sb);
1594 ocfs2_dismount_volume(sb, 0);
1595
1596 unlock_kernel();
1597
1598 mlog_exit_void();
1599 }
1600
1601 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1602 {
1603 struct ocfs2_super *osb;
1604 u32 numbits, freebits;
1605 int status;
1606 struct ocfs2_dinode *bm_lock;
1607 struct buffer_head *bh = NULL;
1608 struct inode *inode = NULL;
1609
1610 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1611
1612 osb = OCFS2_SB(dentry->d_sb);
1613
1614 inode = ocfs2_get_system_file_inode(osb,
1615 GLOBAL_BITMAP_SYSTEM_INODE,
1616 OCFS2_INVALID_SLOT);
1617 if (!inode) {
1618 mlog(ML_ERROR, "failed to get bitmap inode\n");
1619 status = -EIO;
1620 goto bail;
1621 }
1622
1623 status = ocfs2_inode_lock(inode, &bh, 0);
1624 if (status < 0) {
1625 mlog_errno(status);
1626 goto bail;
1627 }
1628
1629 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1630
1631 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1632 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1633
1634 buf->f_type = OCFS2_SUPER_MAGIC;
1635 buf->f_bsize = dentry->d_sb->s_blocksize;
1636 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1637 buf->f_blocks = ((sector_t) numbits) *
1638 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1639 buf->f_bfree = ((sector_t) freebits) *
1640 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1641 buf->f_bavail = buf->f_bfree;
1642 buf->f_files = numbits;
1643 buf->f_ffree = freebits;
1644
1645 brelse(bh);
1646
1647 ocfs2_inode_unlock(inode, 0);
1648 status = 0;
1649 bail:
1650 if (inode)
1651 iput(inode);
1652
1653 mlog_exit(status);
1654
1655 return status;
1656 }
1657
1658 static void ocfs2_inode_init_once(void *data)
1659 {
1660 struct ocfs2_inode_info *oi = data;
1661
1662 oi->ip_flags = 0;
1663 oi->ip_open_count = 0;
1664 spin_lock_init(&oi->ip_lock);
1665 ocfs2_extent_map_init(&oi->vfs_inode);
1666 INIT_LIST_HEAD(&oi->ip_io_markers);
1667 oi->ip_created_trans = 0;
1668 oi->ip_last_trans = 0;
1669 oi->ip_dir_start_lookup = 0;
1670
1671 init_rwsem(&oi->ip_alloc_sem);
1672 init_rwsem(&oi->ip_xattr_sem);
1673 mutex_init(&oi->ip_io_mutex);
1674
1675 oi->ip_blkno = 0ULL;
1676 oi->ip_clusters = 0;
1677
1678 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1679 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1680 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1681
1682 ocfs2_metadata_cache_init(&oi->vfs_inode);
1683
1684 inode_init_once(&oi->vfs_inode);
1685 }
1686
1687 static int ocfs2_initialize_mem_caches(void)
1688 {
1689 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1690 sizeof(struct ocfs2_inode_info),
1691 0,
1692 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1693 SLAB_MEM_SPREAD),
1694 ocfs2_inode_init_once);
1695 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1696 sizeof(struct ocfs2_dquot),
1697 0,
1698 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1699 SLAB_MEM_SPREAD),
1700 NULL);
1701 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1702 sizeof(struct ocfs2_quota_chunk),
1703 0,
1704 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1705 NULL);
1706 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1707 !ocfs2_qf_chunk_cachep) {
1708 if (ocfs2_inode_cachep)
1709 kmem_cache_destroy(ocfs2_inode_cachep);
1710 if (ocfs2_dquot_cachep)
1711 kmem_cache_destroy(ocfs2_dquot_cachep);
1712 if (ocfs2_qf_chunk_cachep)
1713 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1714 return -ENOMEM;
1715 }
1716
1717 return 0;
1718 }
1719
1720 static void ocfs2_free_mem_caches(void)
1721 {
1722 if (ocfs2_inode_cachep)
1723 kmem_cache_destroy(ocfs2_inode_cachep);
1724 ocfs2_inode_cachep = NULL;
1725
1726 if (ocfs2_dquot_cachep)
1727 kmem_cache_destroy(ocfs2_dquot_cachep);
1728 ocfs2_dquot_cachep = NULL;
1729
1730 if (ocfs2_qf_chunk_cachep)
1731 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1732 ocfs2_qf_chunk_cachep = NULL;
1733 }
1734
1735 static int ocfs2_get_sector(struct super_block *sb,
1736 struct buffer_head **bh,
1737 int block,
1738 int sect_size)
1739 {
1740 if (!sb_set_blocksize(sb, sect_size)) {
1741 mlog(ML_ERROR, "unable to set blocksize\n");
1742 return -EIO;
1743 }
1744
1745 *bh = sb_getblk(sb, block);
1746 if (!*bh) {
1747 mlog_errno(-EIO);
1748 return -EIO;
1749 }
1750 lock_buffer(*bh);
1751 if (!buffer_dirty(*bh))
1752 clear_buffer_uptodate(*bh);
1753 unlock_buffer(*bh);
1754 ll_rw_block(READ, 1, bh);
1755 wait_on_buffer(*bh);
1756 if (!buffer_uptodate(*bh)) {
1757 mlog_errno(-EIO);
1758 brelse(*bh);
1759 *bh = NULL;
1760 return -EIO;
1761 }
1762
1763 return 0;
1764 }
1765
1766 static int ocfs2_mount_volume(struct super_block *sb)
1767 {
1768 int status = 0;
1769 int unlock_super = 0;
1770 struct ocfs2_super *osb = OCFS2_SB(sb);
1771
1772 mlog_entry_void();
1773
1774 if (ocfs2_is_hard_readonly(osb))
1775 goto leave;
1776
1777 status = ocfs2_dlm_init(osb);
1778 if (status < 0) {
1779 mlog_errno(status);
1780 goto leave;
1781 }
1782
1783 status = ocfs2_super_lock(osb, 1);
1784 if (status < 0) {
1785 mlog_errno(status);
1786 goto leave;
1787 }
1788 unlock_super = 1;
1789
1790 /* This will load up the node map and add ourselves to it. */
1791 status = ocfs2_find_slot(osb);
1792 if (status < 0) {
1793 mlog_errno(status);
1794 goto leave;
1795 }
1796
1797 /* load all node-local system inodes */
1798 status = ocfs2_init_local_system_inodes(osb);
1799 if (status < 0) {
1800 mlog_errno(status);
1801 goto leave;
1802 }
1803
1804 status = ocfs2_check_volume(osb);
1805 if (status < 0) {
1806 mlog_errno(status);
1807 goto leave;
1808 }
1809
1810 status = ocfs2_truncate_log_init(osb);
1811 if (status < 0)
1812 mlog_errno(status);
1813
1814 leave:
1815 if (unlock_super)
1816 ocfs2_super_unlock(osb, 1);
1817
1818 mlog_exit(status);
1819 return status;
1820 }
1821
1822 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1823 {
1824 int tmp, hangup_needed = 0;
1825 struct ocfs2_super *osb = NULL;
1826 char nodestr[8];
1827
1828 mlog_entry("(0x%p)\n", sb);
1829
1830 BUG_ON(!sb);
1831 osb = OCFS2_SB(sb);
1832 BUG_ON(!osb);
1833
1834 debugfs_remove(osb->osb_ctxt);
1835
1836 /*
1837 * Flush inode dropping work queue so that deletes are
1838 * performed while the filesystem is still working
1839 */
1840 ocfs2_drop_all_dl_inodes(osb);
1841
1842 /* Orphan scan should be stopped as early as possible */
1843 ocfs2_orphan_scan_stop(osb);
1844
1845 ocfs2_disable_quotas(osb);
1846
1847 ocfs2_shutdown_local_alloc(osb);
1848
1849 ocfs2_truncate_log_shutdown(osb);
1850
1851 /* This will disable recovery and flush any recovery work. */
1852 ocfs2_recovery_exit(osb);
1853
1854 ocfs2_journal_shutdown(osb);
1855
1856 ocfs2_sync_blockdev(sb);
1857
1858 /* No cluster connection means we've failed during mount, so skip
1859 * all the steps which depended on that to complete. */
1860 if (osb->cconn) {
1861 tmp = ocfs2_super_lock(osb, 1);
1862 if (tmp < 0) {
1863 mlog_errno(tmp);
1864 return;
1865 }
1866 }
1867
1868 if (osb->slot_num != OCFS2_INVALID_SLOT)
1869 ocfs2_put_slot(osb);
1870
1871 if (osb->cconn)
1872 ocfs2_super_unlock(osb, 1);
1873
1874 ocfs2_release_system_inodes(osb);
1875
1876 /*
1877 * If we're dismounting due to mount error, mount.ocfs2 will clean
1878 * up heartbeat. If we're a local mount, there is no heartbeat.
1879 * If we failed before we got a uuid_str yet, we can't stop
1880 * heartbeat. Otherwise, do it.
1881 */
1882 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1883 hangup_needed = 1;
1884
1885 if (osb->cconn)
1886 ocfs2_dlm_shutdown(osb, hangup_needed);
1887
1888 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1889 debugfs_remove(osb->osb_debug_root);
1890
1891 if (hangup_needed)
1892 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1893
1894 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1895
1896 if (ocfs2_mount_local(osb))
1897 snprintf(nodestr, sizeof(nodestr), "local");
1898 else
1899 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1900
1901 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1902 osb->dev_str, nodestr);
1903
1904 ocfs2_delete_osb(osb);
1905 kfree(osb);
1906 sb->s_dev = 0;
1907 sb->s_fs_info = NULL;
1908 }
1909
1910 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1911 unsigned uuid_bytes)
1912 {
1913 int i, ret;
1914 char *ptr;
1915
1916 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1917
1918 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1919 if (osb->uuid_str == NULL)
1920 return -ENOMEM;
1921
1922 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1923 /* print with null */
1924 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1925 if (ret != 2) /* drop super cleans up */
1926 return -EINVAL;
1927 /* then only advance past the last char */
1928 ptr += 2;
1929 }
1930
1931 return 0;
1932 }
1933
1934 static int ocfs2_initialize_super(struct super_block *sb,
1935 struct buffer_head *bh,
1936 int sector_size,
1937 struct ocfs2_blockcheck_stats *stats)
1938 {
1939 int status;
1940 int i, cbits, bbits;
1941 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1942 struct inode *inode = NULL;
1943 struct ocfs2_journal *journal;
1944 __le32 uuid_net_key;
1945 struct ocfs2_super *osb;
1946
1947 mlog_entry_void();
1948
1949 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1950 if (!osb) {
1951 status = -ENOMEM;
1952 mlog_errno(status);
1953 goto bail;
1954 }
1955
1956 sb->s_fs_info = osb;
1957 sb->s_op = &ocfs2_sops;
1958 sb->s_export_op = &ocfs2_export_ops;
1959 sb->s_qcop = &ocfs2_quotactl_ops;
1960 sb->dq_op = &ocfs2_quota_operations;
1961 sb->s_xattr = ocfs2_xattr_handlers;
1962 sb->s_time_gran = 1;
1963 sb->s_flags |= MS_NOATIME;
1964 /* this is needed to support O_LARGEFILE */
1965 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1966 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1967 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1968
1969 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
1970
1971 for (i = 0; i < 3; i++)
1972 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
1973 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1974
1975 osb->sb = sb;
1976 /* Save off for ocfs2_rw_direct */
1977 osb->s_sectsize_bits = blksize_bits(sector_size);
1978 BUG_ON(!osb->s_sectsize_bits);
1979
1980 spin_lock_init(&osb->dc_task_lock);
1981 init_waitqueue_head(&osb->dc_event);
1982 osb->dc_work_sequence = 0;
1983 osb->dc_wake_sequence = 0;
1984 INIT_LIST_HEAD(&osb->blocked_lock_list);
1985 osb->blocked_lock_count = 0;
1986 spin_lock_init(&osb->osb_lock);
1987 spin_lock_init(&osb->osb_xattr_lock);
1988 ocfs2_init_inode_steal_slot(osb);
1989
1990 atomic_set(&osb->alloc_stats.moves, 0);
1991 atomic_set(&osb->alloc_stats.local_data, 0);
1992 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1993 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1994 atomic_set(&osb->alloc_stats.bg_extends, 0);
1995
1996 /* Copy the blockcheck stats from the superblock probe */
1997 osb->osb_ecc_stats = *stats;
1998
1999 ocfs2_init_node_maps(osb);
2000
2001 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2002 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2003
2004 ocfs2_orphan_scan_init(osb);
2005
2006 status = ocfs2_recovery_init(osb);
2007 if (status) {
2008 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2009 mlog_errno(status);
2010 goto bail;
2011 }
2012
2013 init_waitqueue_head(&osb->checkpoint_event);
2014 atomic_set(&osb->needs_checkpoint, 0);
2015
2016 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2017
2018 osb->slot_num = OCFS2_INVALID_SLOT;
2019
2020 osb->s_xattr_inline_size = le16_to_cpu(
2021 di->id2.i_super.s_xattr_inline_size);
2022
2023 osb->local_alloc_state = OCFS2_LA_UNUSED;
2024 osb->local_alloc_bh = NULL;
2025 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2026
2027 init_waitqueue_head(&osb->osb_mount_event);
2028
2029 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2030 if (!osb->vol_label) {
2031 mlog(ML_ERROR, "unable to alloc vol label\n");
2032 status = -ENOMEM;
2033 goto bail;
2034 }
2035
2036 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2037 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2038 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2039 osb->max_slots);
2040 status = -EINVAL;
2041 goto bail;
2042 }
2043 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2044
2045 osb->slot_recovery_generations =
2046 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2047 GFP_KERNEL);
2048 if (!osb->slot_recovery_generations) {
2049 status = -ENOMEM;
2050 mlog_errno(status);
2051 goto bail;
2052 }
2053
2054 init_waitqueue_head(&osb->osb_wipe_event);
2055 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2056 sizeof(*osb->osb_orphan_wipes),
2057 GFP_KERNEL);
2058 if (!osb->osb_orphan_wipes) {
2059 status = -ENOMEM;
2060 mlog_errno(status);
2061 goto bail;
2062 }
2063
2064 osb->s_feature_compat =
2065 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2066 osb->s_feature_ro_compat =
2067 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2068 osb->s_feature_incompat =
2069 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2070
2071 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2072 mlog(ML_ERROR, "couldn't mount because of unsupported "
2073 "optional features (%x).\n", i);
2074 status = -EINVAL;
2075 goto bail;
2076 }
2077 if (!(osb->sb->s_flags & MS_RDONLY) &&
2078 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2079 mlog(ML_ERROR, "couldn't mount RDWR because of "
2080 "unsupported optional features (%x).\n", i);
2081 status = -EINVAL;
2082 goto bail;
2083 }
2084
2085 if (ocfs2_userspace_stack(osb)) {
2086 memcpy(osb->osb_cluster_stack,
2087 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2088 OCFS2_STACK_LABEL_LEN);
2089 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2090 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2091 mlog(ML_ERROR,
2092 "couldn't mount because of an invalid "
2093 "cluster stack label (%s) \n",
2094 osb->osb_cluster_stack);
2095 status = -EINVAL;
2096 goto bail;
2097 }
2098 } else {
2099 /* The empty string is identical with classic tools that
2100 * don't know about s_cluster_info. */
2101 osb->osb_cluster_stack[0] = '\0';
2102 }
2103
2104 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2105
2106 /* FIXME
2107 * This should be done in ocfs2_journal_init(), but unknown
2108 * ordering issues will cause the filesystem to crash.
2109 * If anyone wants to figure out what part of the code
2110 * refers to osb->journal before ocfs2_journal_init() is run,
2111 * be my guest.
2112 */
2113 /* initialize our journal structure */
2114
2115 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2116 if (!journal) {
2117 mlog(ML_ERROR, "unable to alloc journal\n");
2118 status = -ENOMEM;
2119 goto bail;
2120 }
2121 osb->journal = journal;
2122 journal->j_osb = osb;
2123
2124 atomic_set(&journal->j_num_trans, 0);
2125 init_rwsem(&journal->j_trans_barrier);
2126 init_waitqueue_head(&journal->j_checkpointed);
2127 spin_lock_init(&journal->j_lock);
2128 journal->j_trans_id = (unsigned long) 1;
2129 INIT_LIST_HEAD(&journal->j_la_cleanups);
2130 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2131 journal->j_state = OCFS2_JOURNAL_FREE;
2132
2133 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2134 osb->dentry_lock_list = NULL;
2135
2136 /* get some pseudo constants for clustersize bits */
2137 osb->s_clustersize_bits =
2138 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2139 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2140 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2141
2142 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2143 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2144 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2145 osb->s_clustersize);
2146 status = -EINVAL;
2147 goto bail;
2148 }
2149
2150 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
2151 > (u32)~0UL) {
2152 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
2153 "what jbd can address in 32 bits.\n");
2154 status = -EINVAL;
2155 goto bail;
2156 }
2157
2158 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2159 sizeof(di->id2.i_super.s_uuid))) {
2160 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2161 status = -ENOMEM;
2162 goto bail;
2163 }
2164
2165 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2166
2167 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2168 osb->vol_label[63] = '\0';
2169 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2170 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2171 osb->first_cluster_group_blkno =
2172 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2173 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2174 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2175 mlog(0, "vol_label: %s\n", osb->vol_label);
2176 mlog(0, "uuid: %s\n", osb->uuid_str);
2177 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2178 (unsigned long long)osb->root_blkno,
2179 (unsigned long long)osb->system_dir_blkno);
2180
2181 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2182 if (!osb->osb_dlm_debug) {
2183 status = -ENOMEM;
2184 mlog_errno(status);
2185 goto bail;
2186 }
2187
2188 atomic_set(&osb->vol_state, VOLUME_INIT);
2189
2190 /* load root, system_dir, and all global system inodes */
2191 status = ocfs2_init_global_system_inodes(osb);
2192 if (status < 0) {
2193 mlog_errno(status);
2194 goto bail;
2195 }
2196
2197 /*
2198 * global bitmap
2199 */
2200 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2201 OCFS2_INVALID_SLOT);
2202 if (!inode) {
2203 status = -EINVAL;
2204 mlog_errno(status);
2205 goto bail;
2206 }
2207
2208 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2209 iput(inode);
2210
2211 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
2212
2213 status = ocfs2_init_slot_info(osb);
2214 if (status < 0) {
2215 mlog_errno(status);
2216 goto bail;
2217 }
2218
2219 bail:
2220 mlog_exit(status);
2221 return status;
2222 }
2223
2224 /*
2225 * will return: -EAGAIN if it is ok to keep searching for superblocks
2226 * -EINVAL if there is a bad superblock
2227 * 0 on success
2228 */
2229 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2230 struct buffer_head *bh,
2231 u32 blksz,
2232 struct ocfs2_blockcheck_stats *stats)
2233 {
2234 int status = -EAGAIN;
2235
2236 mlog_entry_void();
2237
2238 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2239 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2240 /* We have to do a raw check of the feature here */
2241 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2242 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2243 status = ocfs2_block_check_validate(bh->b_data,
2244 bh->b_size,
2245 &di->i_check,
2246 stats);
2247 if (status)
2248 goto out;
2249 }
2250 status = -EINVAL;
2251 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2252 mlog(ML_ERROR, "found superblock with incorrect block "
2253 "size: found %u, should be %u\n",
2254 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2255 blksz);
2256 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2257 OCFS2_MAJOR_REV_LEVEL ||
2258 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2259 OCFS2_MINOR_REV_LEVEL) {
2260 mlog(ML_ERROR, "found superblock with bad version: "
2261 "found %u.%u, should be %u.%u\n",
2262 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2263 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2264 OCFS2_MAJOR_REV_LEVEL,
2265 OCFS2_MINOR_REV_LEVEL);
2266 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2267 mlog(ML_ERROR, "bad block number on superblock: "
2268 "found %llu, should be %llu\n",
2269 (unsigned long long)le64_to_cpu(di->i_blkno),
2270 (unsigned long long)bh->b_blocknr);
2271 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2272 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2273 mlog(ML_ERROR, "bad cluster size found: %u\n",
2274 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2275 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2276 mlog(ML_ERROR, "bad root_blkno: 0\n");
2277 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2278 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2279 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2280 mlog(ML_ERROR,
2281 "Superblock slots found greater than file system "
2282 "maximum: found %u, max %u\n",
2283 le16_to_cpu(di->id2.i_super.s_max_slots),
2284 OCFS2_MAX_SLOTS);
2285 } else {
2286 /* found it! */
2287 status = 0;
2288 }
2289 }
2290
2291 out:
2292 mlog_exit(status);
2293 return status;
2294 }
2295
2296 static int ocfs2_check_volume(struct ocfs2_super *osb)
2297 {
2298 int status;
2299 int dirty;
2300 int local;
2301 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2302 * recover
2303 * ourselves. */
2304
2305 mlog_entry_void();
2306
2307 /* Init our journal object. */
2308 status = ocfs2_journal_init(osb->journal, &dirty);
2309 if (status < 0) {
2310 mlog(ML_ERROR, "Could not initialize journal!\n");
2311 goto finally;
2312 }
2313
2314 /* If the journal was unmounted cleanly then we don't want to
2315 * recover anything. Otherwise, journal_load will do that
2316 * dirty work for us :) */
2317 if (!dirty) {
2318 status = ocfs2_journal_wipe(osb->journal, 0);
2319 if (status < 0) {
2320 mlog_errno(status);
2321 goto finally;
2322 }
2323 } else {
2324 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2325 "recovering volume.\n");
2326 }
2327
2328 local = ocfs2_mount_local(osb);
2329
2330 /* will play back anything left in the journal. */
2331 status = ocfs2_journal_load(osb->journal, local, dirty);
2332 if (status < 0) {
2333 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2334 goto finally;
2335 }
2336
2337 if (dirty) {
2338 /* recover my local alloc if we didn't unmount cleanly. */
2339 status = ocfs2_begin_local_alloc_recovery(osb,
2340 osb->slot_num,
2341 &local_alloc);
2342 if (status < 0) {
2343 mlog_errno(status);
2344 goto finally;
2345 }
2346 /* we complete the recovery process after we've marked
2347 * ourselves as mounted. */
2348 }
2349
2350 mlog(0, "Journal loaded.\n");
2351
2352 status = ocfs2_load_local_alloc(osb);
2353 if (status < 0) {
2354 mlog_errno(status);
2355 goto finally;
2356 }
2357
2358 if (dirty) {
2359 /* Recovery will be completed after we've mounted the
2360 * rest of the volume. */
2361 osb->dirty = 1;
2362 osb->local_alloc_copy = local_alloc;
2363 local_alloc = NULL;
2364 }
2365
2366 /* go through each journal, trylock it and if you get the
2367 * lock, and it's marked as dirty, set the bit in the recover
2368 * map and launch a recovery thread for it. */
2369 status = ocfs2_mark_dead_nodes(osb);
2370 if (status < 0) {
2371 mlog_errno(status);
2372 goto finally;
2373 }
2374
2375 status = ocfs2_compute_replay_slots(osb);
2376 if (status < 0)
2377 mlog_errno(status);
2378
2379 finally:
2380 if (local_alloc)
2381 kfree(local_alloc);
2382
2383 mlog_exit(status);
2384 return status;
2385 }
2386
2387 /*
2388 * The routine gets called from dismount or close whenever a dismount on
2389 * volume is requested and the osb open count becomes 1.
2390 * It will remove the osb from the global list and also free up all the
2391 * initialized resources and fileobject.
2392 */
2393 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2394 {
2395 mlog_entry_void();
2396
2397 /* This function assumes that the caller has the main osb resource */
2398
2399 ocfs2_free_slot_info(osb);
2400
2401 kfree(osb->osb_orphan_wipes);
2402 kfree(osb->slot_recovery_generations);
2403 /* FIXME
2404 * This belongs in journal shutdown, but because we have to
2405 * allocate osb->journal at the start of ocfs2_initalize_osb(),
2406 * we free it here.
2407 */
2408 kfree(osb->journal);
2409 if (osb->local_alloc_copy)
2410 kfree(osb->local_alloc_copy);
2411 kfree(osb->uuid_str);
2412 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2413 memset(osb, 0, sizeof(struct ocfs2_super));
2414
2415 mlog_exit_void();
2416 }
2417
2418 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2419 * panic(). We do not support continue-on-error operation. */
2420 static void ocfs2_handle_error(struct super_block *sb)
2421 {
2422 struct ocfs2_super *osb = OCFS2_SB(sb);
2423
2424 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2425 panic("OCFS2: (device %s): panic forced after error\n",
2426 sb->s_id);
2427
2428 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2429
2430 if (sb->s_flags & MS_RDONLY &&
2431 (ocfs2_is_soft_readonly(osb) ||
2432 ocfs2_is_hard_readonly(osb)))
2433 return;
2434
2435 printk(KERN_CRIT "File system is now read-only due to the potential "
2436 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2437 "system is unmounted.\n");
2438 sb->s_flags |= MS_RDONLY;
2439 ocfs2_set_ro_flag(osb, 0);
2440 }
2441
2442 static char error_buf[1024];
2443
2444 void __ocfs2_error(struct super_block *sb,
2445 const char *function,
2446 const char *fmt, ...)
2447 {
2448 va_list args;
2449
2450 va_start(args, fmt);
2451 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2452 va_end(args);
2453
2454 /* Not using mlog here because we want to show the actual
2455 * function the error came from. */
2456 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2457 sb->s_id, function, error_buf);
2458
2459 ocfs2_handle_error(sb);
2460 }
2461
2462 /* Handle critical errors. This is intentionally more drastic than
2463 * ocfs2_handle_error, so we only use for things like journal errors,
2464 * etc. */
2465 void __ocfs2_abort(struct super_block* sb,
2466 const char *function,
2467 const char *fmt, ...)
2468 {
2469 va_list args;
2470
2471 va_start(args, fmt);
2472 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2473 va_end(args);
2474
2475 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2476 sb->s_id, function, error_buf);
2477
2478 /* We don't have the cluster support yet to go straight to
2479 * hard readonly in here. Until then, we want to keep
2480 * ocfs2_abort() so that we can at least mark critical
2481 * errors.
2482 *
2483 * TODO: This should abort the journal and alert other nodes
2484 * that our slot needs recovery. */
2485
2486 /* Force a panic(). This stinks, but it's better than letting
2487 * things continue without having a proper hard readonly
2488 * here. */
2489 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2490 ocfs2_handle_error(sb);
2491 }
2492
2493 module_init(ocfs2_init);
2494 module_exit(ocfs2_exit);
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