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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / super.c
blob02737596b597d7ff96a07a733d7672882476b304
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
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
72 #include "buffer_head_io.h"
73
74 static struct kmem_cache *ocfs2_inode_cachep = NULL;
75 struct kmem_cache *ocfs2_dquot_cachep;
76 struct kmem_cache *ocfs2_qf_chunk_cachep;
77
78 /* OCFS2 needs to schedule several differnt types of work which
79 * require cluster locking, disk I/O, recovery waits, etc. Since these
80 * types of work tend to be heavy we avoid using the kernel events
81 * workqueue and schedule on our own. */
82 struct workqueue_struct *ocfs2_wq = NULL;
83
84 static struct dentry *ocfs2_debugfs_root = NULL;
85
86 MODULE_AUTHOR("Oracle");
87 MODULE_LICENSE("GPL");
88
89 struct mount_options
90 {
91 unsigned long commit_interval;
92 unsigned long mount_opt;
93 unsigned int atime_quantum;
94 signed short slot;
95 unsigned int localalloc_opt;
96 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
97 };
98
99 static int ocfs2_parse_options(struct super_block *sb, char *options,
100 struct mount_options *mopt,
101 int is_remount);
102 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
103 static void ocfs2_put_super(struct super_block *sb);
104 static int ocfs2_mount_volume(struct super_block *sb);
105 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
106 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
107 static int ocfs2_initialize_mem_caches(void);
108 static void ocfs2_free_mem_caches(void);
109 static void ocfs2_delete_osb(struct ocfs2_super *osb);
110
111 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
112
113 static int ocfs2_sync_fs(struct super_block *sb, int wait);
114
115 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
116 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
117 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
118 static int ocfs2_check_volume(struct ocfs2_super *osb);
119 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
120 struct buffer_head *bh,
121 u32 sectsize);
122 static int ocfs2_initialize_super(struct super_block *sb,
123 struct buffer_head *bh,
124 int sector_size);
125 static int ocfs2_get_sector(struct super_block *sb,
126 struct buffer_head **bh,
127 int block,
128 int sect_size);
129 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
130 static void ocfs2_destroy_inode(struct inode *inode);
131 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
132 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
133 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
134
135 static const struct super_operations ocfs2_sops = {
136 .statfs = ocfs2_statfs,
137 .alloc_inode = ocfs2_alloc_inode,
138 .destroy_inode = ocfs2_destroy_inode,
139 .drop_inode = ocfs2_drop_inode,
140 .clear_inode = ocfs2_clear_inode,
141 .delete_inode = ocfs2_delete_inode,
142 .sync_fs = ocfs2_sync_fs,
143 .put_super = ocfs2_put_super,
144 .remount_fs = ocfs2_remount,
145 .show_options = ocfs2_show_options,
146 .quota_read = ocfs2_quota_read,
147 .quota_write = ocfs2_quota_write,
148 };
149
150 enum {
151 Opt_barrier,
152 Opt_err_panic,
153 Opt_err_ro,
154 Opt_intr,
155 Opt_nointr,
156 Opt_hb_none,
157 Opt_hb_local,
158 Opt_data_ordered,
159 Opt_data_writeback,
160 Opt_atime_quantum,
161 Opt_slot,
162 Opt_commit,
163 Opt_localalloc,
164 Opt_localflocks,
165 Opt_stack,
166 Opt_user_xattr,
167 Opt_nouser_xattr,
168 Opt_inode64,
169 Opt_acl,
170 Opt_noacl,
171 Opt_usrquota,
172 Opt_grpquota,
173 Opt_err,
174 };
175
176 static const match_table_t tokens = {
177 {Opt_barrier, "barrier=%u"},
178 {Opt_err_panic, "errors=panic"},
179 {Opt_err_ro, "errors=remount-ro"},
180 {Opt_intr, "intr"},
181 {Opt_nointr, "nointr"},
182 {Opt_hb_none, OCFS2_HB_NONE},
183 {Opt_hb_local, OCFS2_HB_LOCAL},
184 {Opt_data_ordered, "data=ordered"},
185 {Opt_data_writeback, "data=writeback"},
186 {Opt_atime_quantum, "atime_quantum=%u"},
187 {Opt_slot, "preferred_slot=%u"},
188 {Opt_commit, "commit=%u"},
189 {Opt_localalloc, "localalloc=%d"},
190 {Opt_localflocks, "localflocks"},
191 {Opt_stack, "cluster_stack=%s"},
192 {Opt_user_xattr, "user_xattr"},
193 {Opt_nouser_xattr, "nouser_xattr"},
194 {Opt_inode64, "inode64"},
195 {Opt_acl, "acl"},
196 {Opt_noacl, "noacl"},
197 {Opt_usrquota, "usrquota"},
198 {Opt_grpquota, "grpquota"},
199 {Opt_err, NULL}
200 };
201
202 #ifdef CONFIG_DEBUG_FS
203 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
204 {
205 int out = 0;
206 int i;
207 struct ocfs2_cluster_connection *cconn = osb->cconn;
208 struct ocfs2_recovery_map *rm = osb->recovery_map;
209
210 out += snprintf(buf + out, len - out,
211 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
212 "Device", osb->dev_str, osb->uuid_str,
213 osb->fs_generation, osb->vol_label);
214
215 out += snprintf(buf + out, len - out,
216 "%10s => State: %d Flags: 0x%lX\n", "Volume",
217 atomic_read(&osb->vol_state), osb->osb_flags);
218
219 out += snprintf(buf + out, len - out,
220 "%10s => Block: %lu Cluster: %d\n", "Sizes",
221 osb->sb->s_blocksize, osb->s_clustersize);
222
223 out += snprintf(buf + out, len - out,
224 "%10s => Compat: 0x%X Incompat: 0x%X "
225 "ROcompat: 0x%X\n",
226 "Features", osb->s_feature_compat,
227 osb->s_feature_incompat, osb->s_feature_ro_compat);
228
229 out += snprintf(buf + out, len - out,
230 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
231 osb->s_mount_opt, osb->s_atime_quantum);
232
233 out += snprintf(buf + out, len - out,
234 "%10s => Stack: %s Name: %*s Version: %d.%d\n",
235 "Cluster",
236 (*osb->osb_cluster_stack == '\0' ?
237 "o2cb" : osb->osb_cluster_stack),
238 cconn->cc_namelen, cconn->cc_name,
239 cconn->cc_version.pv_major, cconn->cc_version.pv_minor);
240
241 spin_lock(&osb->dc_task_lock);
242 out += snprintf(buf + out, len - out,
243 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
244 "WorkSeq: %lu\n", "DownCnvt",
245 task_pid_nr(osb->dc_task), osb->blocked_lock_count,
246 osb->dc_wake_sequence, osb->dc_work_sequence);
247 spin_unlock(&osb->dc_task_lock);
248
249 spin_lock(&osb->osb_lock);
250 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
251 "Recovery",
252 (osb->recovery_thread_task ?
253 task_pid_nr(osb->recovery_thread_task) : -1));
254 if (rm->rm_used == 0)
255 out += snprintf(buf + out, len - out, " None\n");
256 else {
257 for (i = 0; i < rm->rm_used; i++)
258 out += snprintf(buf + out, len - out, " %d",
259 rm->rm_entries[i]);
260 out += snprintf(buf + out, len - out, "\n");
261 }
262 spin_unlock(&osb->osb_lock);
263
264 out += snprintf(buf + out, len - out,
265 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
266 task_pid_nr(osb->commit_task), osb->osb_commit_interval,
267 atomic_read(&osb->needs_checkpoint));
268
269 out += snprintf(buf + out, len - out,
270 "%10s => State: %d NumTxns: %d TxnId: %lu\n",
271 "Journal", osb->journal->j_state,
272 atomic_read(&osb->journal->j_num_trans),
273 osb->journal->j_trans_id);
274
275 out += snprintf(buf + out, len - out,
276 "%10s => GlobalAllocs: %d LocalAllocs: %d "
277 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
278 "Stats",
279 atomic_read(&osb->alloc_stats.bitmap_data),
280 atomic_read(&osb->alloc_stats.local_data),
281 atomic_read(&osb->alloc_stats.bg_allocs),
282 atomic_read(&osb->alloc_stats.moves),
283 atomic_read(&osb->alloc_stats.bg_extends));
284
285 out += snprintf(buf + out, len - out,
286 "%10s => State: %u Descriptor: %llu Size: %u bits "
287 "Default: %u bits\n",
288 "LocalAlloc", osb->local_alloc_state,
289 (unsigned long long)osb->la_last_gd,
290 osb->local_alloc_bits, osb->local_alloc_default_bits);
291
292 spin_lock(&osb->osb_lock);
293 out += snprintf(buf + out, len - out,
294 "%10s => Slot: %d NumStolen: %d\n", "Steal",
295 osb->s_inode_steal_slot,
296 atomic_read(&osb->s_num_inodes_stolen));
297 spin_unlock(&osb->osb_lock);
298
299 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
300 "Slots", "Num", "RecoGen");
301
302 for (i = 0; i < osb->max_slots; ++i) {
303 out += snprintf(buf + out, len - out,
304 "%10s %c %3d %10d\n",
305 " ",
306 (i == osb->slot_num ? '*' : ' '),
307 i, osb->slot_recovery_generations[i]);
308 }
309
310 return out;
311 }
312
313 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
314 {
315 struct ocfs2_super *osb = inode->i_private;
316 char *buf = NULL;
317
318 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
319 if (!buf)
320 goto bail;
321
322 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
323
324 file->private_data = buf;
325
326 return 0;
327 bail:
328 return -ENOMEM;
329 }
330
331 static int ocfs2_debug_release(struct inode *inode, struct file *file)
332 {
333 kfree(file->private_data);
334 return 0;
335 }
336
337 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
338 size_t nbytes, loff_t *ppos)
339 {
340 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
341 i_size_read(file->f_mapping->host));
342 }
343 #else
344 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
345 {
346 return 0;
347 }
348 static int ocfs2_debug_release(struct inode *inode, struct file *file)
349 {
350 return 0;
351 }
352 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
353 size_t nbytes, loff_t *ppos)
354 {
355 return 0;
356 }
357 #endif /* CONFIG_DEBUG_FS */
358
359 static struct file_operations ocfs2_osb_debug_fops = {
360 .open = ocfs2_osb_debug_open,
361 .release = ocfs2_debug_release,
362 .read = ocfs2_debug_read,
363 .llseek = generic_file_llseek,
364 };
365
366 static int ocfs2_sync_fs(struct super_block *sb, int wait)
367 {
368 int status;
369 tid_t target;
370 struct ocfs2_super *osb = OCFS2_SB(sb);
371
372 if (ocfs2_is_hard_readonly(osb))
373 return -EROFS;
374
375 if (wait) {
376 status = ocfs2_flush_truncate_log(osb);
377 if (status < 0)
378 mlog_errno(status);
379 } else {
380 ocfs2_schedule_truncate_log_flush(osb, 0);
381 }
382
383 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
384 &target)) {
385 if (wait)
386 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
387 target);
388 }
389 return 0;
390 }
391
392 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
393 {
394 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
395 && (ino == USER_QUOTA_SYSTEM_INODE
396 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
397 return 0;
398 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
399 && (ino == GROUP_QUOTA_SYSTEM_INODE
400 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
401 return 0;
402 return 1;
403 }
404
405 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
406 {
407 struct inode *new = NULL;
408 int status = 0;
409 int i;
410
411 mlog_entry_void();
412
413 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
414 if (IS_ERR(new)) {
415 status = PTR_ERR(new);
416 mlog_errno(status);
417 goto bail;
418 }
419 osb->root_inode = new;
420
421 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
422 if (IS_ERR(new)) {
423 status = PTR_ERR(new);
424 mlog_errno(status);
425 goto bail;
426 }
427 osb->sys_root_inode = new;
428
429 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
430 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
431 if (!ocfs2_need_system_inode(osb, i))
432 continue;
433 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
434 if (!new) {
435 ocfs2_release_system_inodes(osb);
436 status = -EINVAL;
437 mlog_errno(status);
438 /* FIXME: Should ERROR_RO_FS */
439 mlog(ML_ERROR, "Unable to load system inode %d, "
440 "possibly corrupt fs?", i);
441 goto bail;
442 }
443 // the array now has one ref, so drop this one
444 iput(new);
445 }
446
447 bail:
448 mlog_exit(status);
449 return status;
450 }
451
452 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
453 {
454 struct inode *new = NULL;
455 int status = 0;
456 int i;
457
458 mlog_entry_void();
459
460 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
461 i < NUM_SYSTEM_INODES;
462 i++) {
463 if (!ocfs2_need_system_inode(osb, i))
464 continue;
465 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
466 if (!new) {
467 ocfs2_release_system_inodes(osb);
468 status = -EINVAL;
469 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
470 status, i, osb->slot_num);
471 goto bail;
472 }
473 /* the array now has one ref, so drop this one */
474 iput(new);
475 }
476
477 bail:
478 mlog_exit(status);
479 return status;
480 }
481
482 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
483 {
484 int i;
485 struct inode *inode;
486
487 mlog_entry_void();
488
489 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
490 inode = osb->system_inodes[i];
491 if (inode) {
492 iput(inode);
493 osb->system_inodes[i] = NULL;
494 }
495 }
496
497 inode = osb->sys_root_inode;
498 if (inode) {
499 iput(inode);
500 osb->sys_root_inode = NULL;
501 }
502
503 inode = osb->root_inode;
504 if (inode) {
505 iput(inode);
506 osb->root_inode = NULL;
507 }
508
509 mlog_exit(0);
510 }
511
512 /* We're allocating fs objects, use GFP_NOFS */
513 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
514 {
515 struct ocfs2_inode_info *oi;
516
517 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
518 if (!oi)
519 return NULL;
520
521 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
522 return &oi->vfs_inode;
523 }
524
525 static void ocfs2_destroy_inode(struct inode *inode)
526 {
527 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
528 }
529
530 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
531 unsigned int cbits)
532 {
533 unsigned int bytes = 1 << cbits;
534 unsigned int trim = bytes;
535 unsigned int bitshift = 32;
536
537 /*
538 * i_size and all block offsets in ocfs2 are always 64 bits
539 * wide. i_clusters is 32 bits, in cluster-sized units. So on
540 * 64 bit platforms, cluster size will be the limiting factor.
541 */
542
543 #if BITS_PER_LONG == 32
544 # if defined(CONFIG_LBD)
545 BUILD_BUG_ON(sizeof(sector_t) != 8);
546 /*
547 * We might be limited by page cache size.
548 */
549 if (bytes > PAGE_CACHE_SIZE) {
550 bytes = PAGE_CACHE_SIZE;
551 trim = 1;
552 /*
553 * Shift by 31 here so that we don't get larger than
554 * MAX_LFS_FILESIZE
555 */
556 bitshift = 31;
557 }
558 # else
559 /*
560 * We are limited by the size of sector_t. Use block size, as
561 * that's what we expose to the VFS.
562 */
563 bytes = 1 << bbits;
564 trim = 1;
565 bitshift = 31;
566 # endif
567 #endif
568
569 /*
570 * Trim by a whole cluster when we can actually approach the
571 * on-disk limits. Otherwise we can overflow i_clusters when
572 * an extent start is at the max offset.
573 */
574 return (((unsigned long long)bytes) << bitshift) - trim;
575 }
576
577 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
578 {
579 int incompat_features;
580 int ret = 0;
581 struct mount_options parsed_options;
582 struct ocfs2_super *osb = OCFS2_SB(sb);
583
584 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
585 ret = -EINVAL;
586 goto out;
587 }
588
589 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
590 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
591 ret = -EINVAL;
592 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
593 goto out;
594 }
595
596 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
597 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
598 ret = -EINVAL;
599 mlog(ML_ERROR, "Cannot change data mode on remount\n");
600 goto out;
601 }
602
603 /* Probably don't want this on remount; it might
604 * mess with other nodes */
605 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
606 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
607 ret = -EINVAL;
608 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
609 goto out;
610 }
611
612 /* We're going to/from readonly mode. */
613 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
614 /* Disable quota accounting before remounting RO */
615 if (*flags & MS_RDONLY) {
616 ret = ocfs2_susp_quotas(osb, 0);
617 if (ret < 0)
618 goto out;
619 }
620 /* Lock here so the check of HARD_RO and the potential
621 * setting of SOFT_RO is atomic. */
622 spin_lock(&osb->osb_lock);
623 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
624 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
625 ret = -EROFS;
626 goto unlock_osb;
627 }
628
629 if (*flags & MS_RDONLY) {
630 mlog(0, "Going to ro mode.\n");
631 sb->s_flags |= MS_RDONLY;
632 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
633 } else {
634 mlog(0, "Making ro filesystem writeable.\n");
635
636 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
637 mlog(ML_ERROR, "Cannot remount RDWR "
638 "filesystem due to previous errors.\n");
639 ret = -EROFS;
640 goto unlock_osb;
641 }
642 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
643 if (incompat_features) {
644 mlog(ML_ERROR, "Cannot remount RDWR because "
645 "of unsupported optional features "
646 "(%x).\n", incompat_features);
647 ret = -EINVAL;
648 goto unlock_osb;
649 }
650 sb->s_flags &= ~MS_RDONLY;
651 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
652 }
653 unlock_osb:
654 spin_unlock(&osb->osb_lock);
655 /* Enable quota accounting after remounting RW */
656 if (!ret && !(*flags & MS_RDONLY)) {
657 if (sb_any_quota_suspended(sb))
658 ret = ocfs2_susp_quotas(osb, 1);
659 else
660 ret = ocfs2_enable_quotas(osb);
661 if (ret < 0) {
662 /* Return back changes... */
663 spin_lock(&osb->osb_lock);
664 sb->s_flags |= MS_RDONLY;
665 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
666 spin_unlock(&osb->osb_lock);
667 goto out;
668 }
669 }
670 }
671
672 if (!ret) {
673 /* Only save off the new mount options in case of a successful
674 * remount. */
675 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
676 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
677 osb->s_mount_opt = parsed_options.mount_opt;
678 osb->s_atime_quantum = parsed_options.atime_quantum;
679 osb->preferred_slot = parsed_options.slot;
680 if (parsed_options.commit_interval)
681 osb->osb_commit_interval = parsed_options.commit_interval;
682
683 if (!ocfs2_is_hard_readonly(osb))
684 ocfs2_set_journal_params(osb);
685 }
686 out:
687 return ret;
688 }
689
690 static int ocfs2_sb_probe(struct super_block *sb,
691 struct buffer_head **bh,
692 int *sector_size)
693 {
694 int status, tmpstat;
695 struct ocfs1_vol_disk_hdr *hdr;
696 struct ocfs2_dinode *di;
697 int blksize;
698
699 *bh = NULL;
700
701 /* may be > 512 */
702 *sector_size = bdev_logical_block_size(sb->s_bdev);
703 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
704 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
705 *sector_size, OCFS2_MAX_BLOCKSIZE);
706 status = -EINVAL;
707 goto bail;
708 }
709
710 /* Can this really happen? */
711 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
712 *sector_size = OCFS2_MIN_BLOCKSIZE;
713
714 /* check block zero for old format */
715 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
716 if (status < 0) {
717 mlog_errno(status);
718 goto bail;
719 }
720 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
721 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
722 mlog(ML_ERROR, "incompatible version: %u.%u\n",
723 hdr->major_version, hdr->minor_version);
724 status = -EINVAL;
725 }
726 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
727 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
728 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
729 hdr->signature);
730 status = -EINVAL;
731 }
732 brelse(*bh);
733 *bh = NULL;
734 if (status < 0) {
735 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
736 "upgraded before mounting with ocfs v2\n");
737 goto bail;
738 }
739
740 /*
741 * Now check at magic offset for 512, 1024, 2048, 4096
742 * blocksizes. 4096 is the maximum blocksize because it is
743 * the minimum clustersize.
744 */
745 status = -EINVAL;
746 for (blksize = *sector_size;
747 blksize <= OCFS2_MAX_BLOCKSIZE;
748 blksize <<= 1) {
749 tmpstat = ocfs2_get_sector(sb, bh,
750 OCFS2_SUPER_BLOCK_BLKNO,
751 blksize);
752 if (tmpstat < 0) {
753 status = tmpstat;
754 mlog_errno(status);
755 goto bail;
756 }
757 di = (struct ocfs2_dinode *) (*bh)->b_data;
758 status = ocfs2_verify_volume(di, *bh, blksize);
759 if (status >= 0)
760 goto bail;
761 brelse(*bh);
762 *bh = NULL;
763 if (status != -EAGAIN)
764 break;
765 }
766
767 bail:
768 return status;
769 }
770
771 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
772 {
773 if (ocfs2_mount_local(osb)) {
774 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
775 mlog(ML_ERROR, "Cannot heartbeat on a locally "
776 "mounted device.\n");
777 return -EINVAL;
778 }
779 }
780
781 if (ocfs2_userspace_stack(osb)) {
782 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
783 mlog(ML_ERROR, "Userspace stack expected, but "
784 "o2cb heartbeat arguments passed to mount\n");
785 return -EINVAL;
786 }
787 }
788
789 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
790 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
791 !ocfs2_userspace_stack(osb)) {
792 mlog(ML_ERROR, "Heartbeat has to be started to mount "
793 "a read-write clustered device.\n");
794 return -EINVAL;
795 }
796 }
797
798 return 0;
799 }
800
801 /*
802 * If we're using a userspace stack, mount should have passed
803 * a name that matches the disk. If not, mount should not
804 * have passed a stack.
805 */
806 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
807 struct mount_options *mopt)
808 {
809 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
810 mlog(ML_ERROR,
811 "cluster stack passed to mount, but this filesystem "
812 "does not support it\n");
813 return -EINVAL;
814 }
815
816 if (ocfs2_userspace_stack(osb) &&
817 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
818 OCFS2_STACK_LABEL_LEN)) {
819 mlog(ML_ERROR,
820 "cluster stack passed to mount (\"%s\") does not "
821 "match the filesystem (\"%s\")\n",
822 mopt->cluster_stack,
823 osb->osb_cluster_stack);
824 return -EINVAL;
825 }
826
827 return 0;
828 }
829
830 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
831 {
832 int type;
833 struct super_block *sb = osb->sb;
834 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
835 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
836 int status = 0;
837
838 for (type = 0; type < MAXQUOTAS; type++) {
839 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
840 continue;
841 if (unsuspend)
842 status = vfs_quota_enable(
843 sb_dqopt(sb)->files[type],
844 type, QFMT_OCFS2,
845 DQUOT_SUSPENDED);
846 else
847 status = vfs_quota_disable(sb, type,
848 DQUOT_SUSPENDED);
849 if (status < 0)
850 break;
851 }
852 if (status < 0)
853 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
854 "remount (error = %d).\n", status);
855 return status;
856 }
857
858 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
859 {
860 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
861 struct super_block *sb = osb->sb;
862 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
863 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
864 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
865 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
866 int status;
867 int type;
868
869 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
870 for (type = 0; type < MAXQUOTAS; type++) {
871 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
872 continue;
873 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
874 osb->slot_num);
875 if (!inode[type]) {
876 status = -ENOENT;
877 goto out_quota_off;
878 }
879 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2,
880 DQUOT_USAGE_ENABLED);
881 if (status < 0)
882 goto out_quota_off;
883 }
884
885 for (type = 0; type < MAXQUOTAS; type++)
886 iput(inode[type]);
887 return 0;
888 out_quota_off:
889 ocfs2_disable_quotas(osb);
890 for (type = 0; type < MAXQUOTAS; type++)
891 iput(inode[type]);
892 mlog_errno(status);
893 return status;
894 }
895
896 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
897 {
898 int type;
899 struct inode *inode;
900 struct super_block *sb = osb->sb;
901
902 /* We mostly ignore errors in this function because there's not much
903 * we can do when we see them */
904 for (type = 0; type < MAXQUOTAS; type++) {
905 if (!sb_has_quota_loaded(sb, type))
906 continue;
907 inode = igrab(sb->s_dquot.files[type]);
908 /* Turn off quotas. This will remove all dquot structures from
909 * memory and so they will be automatically synced to global
910 * quota files */
911 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED |
912 DQUOT_LIMITS_ENABLED);
913 if (!inode)
914 continue;
915 iput(inode);
916 }
917 }
918
919 /* Handle quota on quotactl */
920 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
921 char *path, int remount)
922 {
923 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
924 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
925
926 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
927 return -EINVAL;
928
929 if (remount)
930 return 0; /* Just ignore it has been handled in
931 * ocfs2_remount() */
932 return vfs_quota_enable(sb_dqopt(sb)->files[type], type,
933 format_id, DQUOT_LIMITS_ENABLED);
934 }
935
936 /* Handle quota off quotactl */
937 static int ocfs2_quota_off(struct super_block *sb, int type, int remount)
938 {
939 if (remount)
940 return 0; /* Ignore now and handle later in
941 * ocfs2_remount() */
942 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
943 }
944
945 static struct quotactl_ops ocfs2_quotactl_ops = {
946 .quota_on = ocfs2_quota_on,
947 .quota_off = ocfs2_quota_off,
948 .quota_sync = vfs_quota_sync,
949 .get_info = vfs_get_dqinfo,
950 .set_info = vfs_set_dqinfo,
951 .get_dqblk = vfs_get_dqblk,
952 .set_dqblk = vfs_set_dqblk,
953 };
954
955 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
956 {
957 struct dentry *root;
958 int status, sector_size;
959 struct mount_options parsed_options;
960 struct inode *inode = NULL;
961 struct ocfs2_super *osb = NULL;
962 struct buffer_head *bh = NULL;
963 char nodestr[8];
964
965 mlog_entry("%p, %p, %i", sb, data, silent);
966
967 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
968 status = -EINVAL;
969 goto read_super_error;
970 }
971
972 /* probe for superblock */
973 status = ocfs2_sb_probe(sb, &bh, &sector_size);
974 if (status < 0) {
975 mlog(ML_ERROR, "superblock probe failed!\n");
976 goto read_super_error;
977 }
978
979 status = ocfs2_initialize_super(sb, bh, sector_size);
980 osb = OCFS2_SB(sb);
981 if (status < 0) {
982 mlog_errno(status);
983 goto read_super_error;
984 }
985 brelse(bh);
986 bh = NULL;
987
988 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
989 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
990
991 osb->s_mount_opt = parsed_options.mount_opt;
992 osb->s_atime_quantum = parsed_options.atime_quantum;
993 osb->preferred_slot = parsed_options.slot;
994 osb->osb_commit_interval = parsed_options.commit_interval;
995 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
996 osb->local_alloc_bits = osb->local_alloc_default_bits;
997 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA &&
998 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
999 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1000 status = -EINVAL;
1001 mlog(ML_ERROR, "User quotas were requested, but this "
1002 "filesystem does not have the feature enabled.\n");
1003 goto read_super_error;
1004 }
1005 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1006 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1007 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1008 status = -EINVAL;
1009 mlog(ML_ERROR, "Group quotas were requested, but this "
1010 "filesystem does not have the feature enabled.\n");
1011 goto read_super_error;
1012 }
1013
1014 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1015 if (status)
1016 goto read_super_error;
1017
1018 sb->s_magic = OCFS2_SUPER_MAGIC;
1019
1020 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1021 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1022
1023 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1024 * heartbeat=none */
1025 if (bdev_read_only(sb->s_bdev)) {
1026 if (!(sb->s_flags & MS_RDONLY)) {
1027 status = -EACCES;
1028 mlog(ML_ERROR, "Readonly device detected but readonly "
1029 "mount was not specified.\n");
1030 goto read_super_error;
1031 }
1032
1033 /* You should not be able to start a local heartbeat
1034 * on a readonly device. */
1035 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1036 status = -EROFS;
1037 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1038 "device.\n");
1039 goto read_super_error;
1040 }
1041
1042 status = ocfs2_check_journals_nolocks(osb);
1043 if (status < 0) {
1044 if (status == -EROFS)
1045 mlog(ML_ERROR, "Recovery required on readonly "
1046 "file system, but write access is "
1047 "unavailable.\n");
1048 else
1049 mlog_errno(status);
1050 goto read_super_error;
1051 }
1052
1053 ocfs2_set_ro_flag(osb, 1);
1054
1055 printk(KERN_NOTICE "Readonly device detected. No cluster "
1056 "services will be utilized for this mount. Recovery "
1057 "will be skipped.\n");
1058 }
1059
1060 if (!ocfs2_is_hard_readonly(osb)) {
1061 if (sb->s_flags & MS_RDONLY)
1062 ocfs2_set_ro_flag(osb, 0);
1063 }
1064
1065 status = ocfs2_verify_heartbeat(osb);
1066 if (status < 0) {
1067 mlog_errno(status);
1068 goto read_super_error;
1069 }
1070
1071 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1072 ocfs2_debugfs_root);
1073 if (!osb->osb_debug_root) {
1074 status = -EINVAL;
1075 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1076 goto read_super_error;
1077 }
1078
1079 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1080 osb->osb_debug_root,
1081 osb,
1082 &ocfs2_osb_debug_fops);
1083 if (!osb->osb_ctxt) {
1084 status = -EINVAL;
1085 mlog_errno(status);
1086 goto read_super_error;
1087 }
1088
1089 status = ocfs2_mount_volume(sb);
1090 if (osb->root_inode)
1091 inode = igrab(osb->root_inode);
1092
1093 if (status < 0)
1094 goto read_super_error;
1095
1096 if (!inode) {
1097 status = -EIO;
1098 mlog_errno(status);
1099 goto read_super_error;
1100 }
1101
1102 root = d_alloc_root(inode);
1103 if (!root) {
1104 status = -ENOMEM;
1105 mlog_errno(status);
1106 goto read_super_error;
1107 }
1108
1109 sb->s_root = root;
1110
1111 ocfs2_complete_mount_recovery(osb);
1112
1113 if (ocfs2_mount_local(osb))
1114 snprintf(nodestr, sizeof(nodestr), "local");
1115 else
1116 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1117
1118 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1119 "with %s data mode.\n",
1120 osb->dev_str, nodestr, osb->slot_num,
1121 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1122 "ordered");
1123
1124 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1125 wake_up(&osb->osb_mount_event);
1126
1127 /* Now we can initialize quotas because we can afford to wait
1128 * for cluster locks recovery now. That also means that truncation
1129 * log recovery can happen but that waits for proper quota setup */
1130 if (!(sb->s_flags & MS_RDONLY)) {
1131 status = ocfs2_enable_quotas(osb);
1132 if (status < 0) {
1133 /* We have to err-out specially here because
1134 * s_root is already set */
1135 mlog_errno(status);
1136 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1137 wake_up(&osb->osb_mount_event);
1138 mlog_exit(status);
1139 return status;
1140 }
1141 }
1142
1143 ocfs2_complete_quota_recovery(osb);
1144
1145 /* Now we wake up again for processes waiting for quotas */
1146 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1147 wake_up(&osb->osb_mount_event);
1148
1149 mlog_exit(status);
1150 return status;
1151
1152 read_super_error:
1153 brelse(bh);
1154
1155 if (inode)
1156 iput(inode);
1157
1158 if (osb) {
1159 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1160 wake_up(&osb->osb_mount_event);
1161 ocfs2_dismount_volume(sb, 1);
1162 }
1163
1164 mlog_exit(status);
1165 return status;
1166 }
1167
1168 static int ocfs2_get_sb(struct file_system_type *fs_type,
1169 int flags,
1170 const char *dev_name,
1171 void *data,
1172 struct vfsmount *mnt)
1173 {
1174 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1175 mnt);
1176 }
1177
1178 static struct file_system_type ocfs2_fs_type = {
1179 .owner = THIS_MODULE,
1180 .name = "ocfs2",
1181 .get_sb = ocfs2_get_sb, /* is this called when we mount
1182 * the fs? */
1183 .kill_sb = kill_block_super, /* set to the generic one
1184 * right now, but do we
1185 * need to change that? */
1186 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1187 .next = NULL
1188 };
1189
1190 static int ocfs2_parse_options(struct super_block *sb,
1191 char *options,
1192 struct mount_options *mopt,
1193 int is_remount)
1194 {
1195 int status;
1196 char *p;
1197
1198 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1199 options ? options : "(none)");
1200
1201 mopt->commit_interval = 0;
1202 mopt->mount_opt = 0;
1203 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1204 mopt->slot = OCFS2_INVALID_SLOT;
1205 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
1206 mopt->cluster_stack[0] = '\0';
1207
1208 if (!options) {
1209 status = 1;
1210 goto bail;
1211 }
1212
1213 while ((p = strsep(&options, ",")) != NULL) {
1214 int token, option;
1215 substring_t args[MAX_OPT_ARGS];
1216
1217 if (!*p)
1218 continue;
1219
1220 token = match_token(p, tokens, args);
1221 switch (token) {
1222 case Opt_hb_local:
1223 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1224 break;
1225 case Opt_hb_none:
1226 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
1227 break;
1228 case Opt_barrier:
1229 if (match_int(&args[0], &option)) {
1230 status = 0;
1231 goto bail;
1232 }
1233 if (option)
1234 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1235 else
1236 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1237 break;
1238 case Opt_intr:
1239 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1240 break;
1241 case Opt_nointr:
1242 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1243 break;
1244 case Opt_err_panic:
1245 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1246 break;
1247 case Opt_err_ro:
1248 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1249 break;
1250 case Opt_data_ordered:
1251 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1252 break;
1253 case Opt_data_writeback:
1254 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1255 break;
1256 case Opt_user_xattr:
1257 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1258 break;
1259 case Opt_nouser_xattr:
1260 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1261 break;
1262 case Opt_atime_quantum:
1263 if (match_int(&args[0], &option)) {
1264 status = 0;
1265 goto bail;
1266 }
1267 if (option >= 0)
1268 mopt->atime_quantum = option;
1269 break;
1270 case Opt_slot:
1271 option = 0;
1272 if (match_int(&args[0], &option)) {
1273 status = 0;
1274 goto bail;
1275 }
1276 if (option)
1277 mopt->slot = (s16)option;
1278 break;
1279 case Opt_commit:
1280 option = 0;
1281 if (match_int(&args[0], &option)) {
1282 status = 0;
1283 goto bail;
1284 }
1285 if (option < 0)
1286 return 0;
1287 if (option == 0)
1288 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1289 mopt->commit_interval = HZ * option;
1290 break;
1291 case Opt_localalloc:
1292 option = 0;
1293 if (match_int(&args[0], &option)) {
1294 status = 0;
1295 goto bail;
1296 }
1297 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
1298 mopt->localalloc_opt = option;
1299 break;
1300 case Opt_localflocks:
1301 /*
1302 * Changing this during remount could race
1303 * flock() requests, or "unbalance" existing
1304 * ones (e.g., a lock is taken in one mode but
1305 * dropped in the other). If users care enough
1306 * to flip locking modes during remount, we
1307 * could add a "local" flag to individual
1308 * flock structures for proper tracking of
1309 * state.
1310 */
1311 if (!is_remount)
1312 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1313 break;
1314 case Opt_stack:
1315 /* Check both that the option we were passed
1316 * is of the right length and that it is a proper
1317 * string of the right length.
1318 */
1319 if (((args[0].to - args[0].from) !=
1320 OCFS2_STACK_LABEL_LEN) ||
1321 (strnlen(args[0].from,
1322 OCFS2_STACK_LABEL_LEN) !=
1323 OCFS2_STACK_LABEL_LEN)) {
1324 mlog(ML_ERROR,
1325 "Invalid cluster_stack option\n");
1326 status = 0;
1327 goto bail;
1328 }
1329 memcpy(mopt->cluster_stack, args[0].from,
1330 OCFS2_STACK_LABEL_LEN);
1331 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1332 break;
1333 case Opt_inode64:
1334 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1335 break;
1336 case Opt_usrquota:
1337 /* We check only on remount, otherwise features
1338 * aren't yet initialized. */
1339 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1340 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1341 mlog(ML_ERROR, "User quota requested but "
1342 "filesystem feature is not set\n");
1343 status = 0;
1344 goto bail;
1345 }
1346 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1347 break;
1348 case Opt_grpquota:
1349 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1350 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1351 mlog(ML_ERROR, "Group quota requested but "
1352 "filesystem feature is not set\n");
1353 status = 0;
1354 goto bail;
1355 }
1356 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1357 break;
1358 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1359 case Opt_acl:
1360 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1361 break;
1362 case Opt_noacl:
1363 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1364 break;
1365 #else
1366 case Opt_acl:
1367 case Opt_noacl:
1368 printk(KERN_INFO "ocfs2 (no)acl options not supported\n");
1369 break;
1370 #endif
1371 default:
1372 mlog(ML_ERROR,
1373 "Unrecognized mount option \"%s\" "
1374 "or missing value\n", p);
1375 status = 0;
1376 goto bail;
1377 }
1378 }
1379
1380 status = 1;
1381
1382 bail:
1383 mlog_exit(status);
1384 return status;
1385 }
1386
1387 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1388 {
1389 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1390 unsigned long opts = osb->s_mount_opt;
1391 unsigned int local_alloc_megs;
1392
1393 if (opts & OCFS2_MOUNT_HB_LOCAL)
1394 seq_printf(s, ",_netdev,heartbeat=local");
1395 else
1396 seq_printf(s, ",heartbeat=none");
1397
1398 if (opts & OCFS2_MOUNT_NOINTR)
1399 seq_printf(s, ",nointr");
1400
1401 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1402 seq_printf(s, ",data=writeback");
1403 else
1404 seq_printf(s, ",data=ordered");
1405
1406 if (opts & OCFS2_MOUNT_BARRIER)
1407 seq_printf(s, ",barrier=1");
1408
1409 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1410 seq_printf(s, ",errors=panic");
1411 else
1412 seq_printf(s, ",errors=remount-ro");
1413
1414 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1415 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1416
1417 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1418 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1419
1420 if (osb->osb_commit_interval)
1421 seq_printf(s, ",commit=%u",
1422 (unsigned) (osb->osb_commit_interval / HZ));
1423
1424 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1425 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1426 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1427
1428 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1429 seq_printf(s, ",localflocks,");
1430
1431 if (osb->osb_cluster_stack[0])
1432 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1433 osb->osb_cluster_stack);
1434 if (opts & OCFS2_MOUNT_USRQUOTA)
1435 seq_printf(s, ",usrquota");
1436 if (opts & OCFS2_MOUNT_GRPQUOTA)
1437 seq_printf(s, ",grpquota");
1438
1439 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1440 seq_printf(s, ",nouser_xattr");
1441 else
1442 seq_printf(s, ",user_xattr");
1443
1444 if (opts & OCFS2_MOUNT_INODE64)
1445 seq_printf(s, ",inode64");
1446
1447 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1448 if (opts & OCFS2_MOUNT_POSIX_ACL)
1449 seq_printf(s, ",acl");
1450 else
1451 seq_printf(s, ",noacl");
1452 #endif
1453
1454 return 0;
1455 }
1456
1457 static int __init ocfs2_init(void)
1458 {
1459 int status;
1460
1461 mlog_entry_void();
1462
1463 ocfs2_print_version();
1464
1465 status = init_ocfs2_uptodate_cache();
1466 if (status < 0) {
1467 mlog_errno(status);
1468 goto leave;
1469 }
1470
1471 status = ocfs2_initialize_mem_caches();
1472 if (status < 0) {
1473 mlog_errno(status);
1474 goto leave;
1475 }
1476
1477 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1478 if (!ocfs2_wq) {
1479 status = -ENOMEM;
1480 goto leave;
1481 }
1482
1483 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1484 if (!ocfs2_debugfs_root) {
1485 status = -EFAULT;
1486 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1487 }
1488
1489 status = ocfs2_quota_setup();
1490 if (status)
1491 goto leave;
1492
1493 ocfs2_set_locking_protocol();
1494
1495 status = register_quota_format(&ocfs2_quota_format);
1496 leave:
1497 if (status < 0) {
1498 ocfs2_quota_shutdown();
1499 ocfs2_free_mem_caches();
1500 exit_ocfs2_uptodate_cache();
1501 }
1502
1503 mlog_exit(status);
1504
1505 if (status >= 0) {
1506 return register_filesystem(&ocfs2_fs_type);
1507 } else
1508 return -1;
1509 }
1510
1511 static void __exit ocfs2_exit(void)
1512 {
1513 mlog_entry_void();
1514
1515 ocfs2_quota_shutdown();
1516
1517 if (ocfs2_wq) {
1518 flush_workqueue(ocfs2_wq);
1519 destroy_workqueue(ocfs2_wq);
1520 }
1521
1522 unregister_quota_format(&ocfs2_quota_format);
1523
1524 debugfs_remove(ocfs2_debugfs_root);
1525
1526 ocfs2_free_mem_caches();
1527
1528 unregister_filesystem(&ocfs2_fs_type);
1529
1530 exit_ocfs2_uptodate_cache();
1531
1532 mlog_exit_void();
1533 }
1534
1535 static void ocfs2_put_super(struct super_block *sb)
1536 {
1537 mlog_entry("(0x%p)\n", sb);
1538
1539 lock_kernel();
1540
1541 ocfs2_sync_blockdev(sb);
1542 ocfs2_dismount_volume(sb, 0);
1543
1544 unlock_kernel();
1545
1546 mlog_exit_void();
1547 }
1548
1549 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1550 {
1551 struct ocfs2_super *osb;
1552 u32 numbits, freebits;
1553 int status;
1554 struct ocfs2_dinode *bm_lock;
1555 struct buffer_head *bh = NULL;
1556 struct inode *inode = NULL;
1557
1558 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1559
1560 osb = OCFS2_SB(dentry->d_sb);
1561
1562 inode = ocfs2_get_system_file_inode(osb,
1563 GLOBAL_BITMAP_SYSTEM_INODE,
1564 OCFS2_INVALID_SLOT);
1565 if (!inode) {
1566 mlog(ML_ERROR, "failed to get bitmap inode\n");
1567 status = -EIO;
1568 goto bail;
1569 }
1570
1571 status = ocfs2_inode_lock(inode, &bh, 0);
1572 if (status < 0) {
1573 mlog_errno(status);
1574 goto bail;
1575 }
1576
1577 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1578
1579 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1580 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1581
1582 buf->f_type = OCFS2_SUPER_MAGIC;
1583 buf->f_bsize = dentry->d_sb->s_blocksize;
1584 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1585 buf->f_blocks = ((sector_t) numbits) *
1586 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1587 buf->f_bfree = ((sector_t) freebits) *
1588 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1589 buf->f_bavail = buf->f_bfree;
1590 buf->f_files = numbits;
1591 buf->f_ffree = freebits;
1592
1593 brelse(bh);
1594
1595 ocfs2_inode_unlock(inode, 0);
1596 status = 0;
1597 bail:
1598 if (inode)
1599 iput(inode);
1600
1601 mlog_exit(status);
1602
1603 return status;
1604 }
1605
1606 static void ocfs2_inode_init_once(void *data)
1607 {
1608 struct ocfs2_inode_info *oi = data;
1609
1610 oi->ip_flags = 0;
1611 oi->ip_open_count = 0;
1612 spin_lock_init(&oi->ip_lock);
1613 ocfs2_extent_map_init(&oi->vfs_inode);
1614 INIT_LIST_HEAD(&oi->ip_io_markers);
1615 oi->ip_created_trans = 0;
1616 oi->ip_last_trans = 0;
1617 oi->ip_dir_start_lookup = 0;
1618
1619 init_rwsem(&oi->ip_alloc_sem);
1620 init_rwsem(&oi->ip_xattr_sem);
1621 mutex_init(&oi->ip_io_mutex);
1622
1623 oi->ip_blkno = 0ULL;
1624 oi->ip_clusters = 0;
1625
1626 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1627 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1628 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1629
1630 ocfs2_metadata_cache_init(&oi->vfs_inode);
1631
1632 inode_init_once(&oi->vfs_inode);
1633 }
1634
1635 static int ocfs2_initialize_mem_caches(void)
1636 {
1637 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1638 sizeof(struct ocfs2_inode_info),
1639 0,
1640 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1641 SLAB_MEM_SPREAD),
1642 ocfs2_inode_init_once);
1643 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1644 sizeof(struct ocfs2_dquot),
1645 0,
1646 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1647 SLAB_MEM_SPREAD),
1648 NULL);
1649 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1650 sizeof(struct ocfs2_quota_chunk),
1651 0,
1652 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1653 NULL);
1654 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1655 !ocfs2_qf_chunk_cachep) {
1656 if (ocfs2_inode_cachep)
1657 kmem_cache_destroy(ocfs2_inode_cachep);
1658 if (ocfs2_dquot_cachep)
1659 kmem_cache_destroy(ocfs2_dquot_cachep);
1660 if (ocfs2_qf_chunk_cachep)
1661 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1662 return -ENOMEM;
1663 }
1664
1665 return 0;
1666 }
1667
1668 static void ocfs2_free_mem_caches(void)
1669 {
1670 if (ocfs2_inode_cachep)
1671 kmem_cache_destroy(ocfs2_inode_cachep);
1672 ocfs2_inode_cachep = NULL;
1673
1674 if (ocfs2_dquot_cachep)
1675 kmem_cache_destroy(ocfs2_dquot_cachep);
1676 ocfs2_dquot_cachep = NULL;
1677
1678 if (ocfs2_qf_chunk_cachep)
1679 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1680 ocfs2_qf_chunk_cachep = NULL;
1681 }
1682
1683 static int ocfs2_get_sector(struct super_block *sb,
1684 struct buffer_head **bh,
1685 int block,
1686 int sect_size)
1687 {
1688 if (!sb_set_blocksize(sb, sect_size)) {
1689 mlog(ML_ERROR, "unable to set blocksize\n");
1690 return -EIO;
1691 }
1692
1693 *bh = sb_getblk(sb, block);
1694 if (!*bh) {
1695 mlog_errno(-EIO);
1696 return -EIO;
1697 }
1698 lock_buffer(*bh);
1699 if (!buffer_dirty(*bh))
1700 clear_buffer_uptodate(*bh);
1701 unlock_buffer(*bh);
1702 ll_rw_block(READ, 1, bh);
1703 wait_on_buffer(*bh);
1704 if (!buffer_uptodate(*bh)) {
1705 mlog_errno(-EIO);
1706 brelse(*bh);
1707 *bh = NULL;
1708 return -EIO;
1709 }
1710
1711 return 0;
1712 }
1713
1714 static int ocfs2_mount_volume(struct super_block *sb)
1715 {
1716 int status = 0;
1717 int unlock_super = 0;
1718 struct ocfs2_super *osb = OCFS2_SB(sb);
1719
1720 mlog_entry_void();
1721
1722 if (ocfs2_is_hard_readonly(osb))
1723 goto leave;
1724
1725 status = ocfs2_dlm_init(osb);
1726 if (status < 0) {
1727 mlog_errno(status);
1728 goto leave;
1729 }
1730
1731 status = ocfs2_super_lock(osb, 1);
1732 if (status < 0) {
1733 mlog_errno(status);
1734 goto leave;
1735 }
1736 unlock_super = 1;
1737
1738 /* This will load up the node map and add ourselves to it. */
1739 status = ocfs2_find_slot(osb);
1740 if (status < 0) {
1741 mlog_errno(status);
1742 goto leave;
1743 }
1744
1745 /* load all node-local system inodes */
1746 status = ocfs2_init_local_system_inodes(osb);
1747 if (status < 0) {
1748 mlog_errno(status);
1749 goto leave;
1750 }
1751
1752 status = ocfs2_check_volume(osb);
1753 if (status < 0) {
1754 mlog_errno(status);
1755 goto leave;
1756 }
1757
1758 status = ocfs2_truncate_log_init(osb);
1759 if (status < 0) {
1760 mlog_errno(status);
1761 goto leave;
1762 }
1763
1764 if (ocfs2_mount_local(osb))
1765 goto leave;
1766
1767 leave:
1768 if (unlock_super)
1769 ocfs2_super_unlock(osb, 1);
1770
1771 mlog_exit(status);
1772 return status;
1773 }
1774
1775 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1776 {
1777 int tmp, hangup_needed = 0;
1778 struct ocfs2_super *osb = NULL;
1779 char nodestr[8];
1780
1781 mlog_entry("(0x%p)\n", sb);
1782
1783 BUG_ON(!sb);
1784 osb = OCFS2_SB(sb);
1785 BUG_ON(!osb);
1786
1787 debugfs_remove(osb->osb_ctxt);
1788
1789 ocfs2_disable_quotas(osb);
1790
1791 ocfs2_shutdown_local_alloc(osb);
1792
1793 ocfs2_truncate_log_shutdown(osb);
1794
1795 /* This will disable recovery and flush any recovery work. */
1796 ocfs2_recovery_exit(osb);
1797
1798 ocfs2_journal_shutdown(osb);
1799
1800 ocfs2_sync_blockdev(sb);
1801
1802 /* No cluster connection means we've failed during mount, so skip
1803 * all the steps which depended on that to complete. */
1804 if (osb->cconn) {
1805 tmp = ocfs2_super_lock(osb, 1);
1806 if (tmp < 0) {
1807 mlog_errno(tmp);
1808 return;
1809 }
1810 }
1811
1812 if (osb->slot_num != OCFS2_INVALID_SLOT)
1813 ocfs2_put_slot(osb);
1814
1815 if (osb->cconn)
1816 ocfs2_super_unlock(osb, 1);
1817
1818 ocfs2_release_system_inodes(osb);
1819
1820 /*
1821 * If we're dismounting due to mount error, mount.ocfs2 will clean
1822 * up heartbeat. If we're a local mount, there is no heartbeat.
1823 * If we failed before we got a uuid_str yet, we can't stop
1824 * heartbeat. Otherwise, do it.
1825 */
1826 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1827 hangup_needed = 1;
1828
1829 if (osb->cconn)
1830 ocfs2_dlm_shutdown(osb, hangup_needed);
1831
1832 debugfs_remove(osb->osb_debug_root);
1833
1834 if (hangup_needed)
1835 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1836
1837 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1838
1839 if (ocfs2_mount_local(osb))
1840 snprintf(nodestr, sizeof(nodestr), "local");
1841 else
1842 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1843
1844 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1845 osb->dev_str, nodestr);
1846
1847 ocfs2_delete_osb(osb);
1848 kfree(osb);
1849 sb->s_dev = 0;
1850 sb->s_fs_info = NULL;
1851 }
1852
1853 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1854 unsigned uuid_bytes)
1855 {
1856 int i, ret;
1857 char *ptr;
1858
1859 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1860
1861 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1862 if (osb->uuid_str == NULL)
1863 return -ENOMEM;
1864
1865 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1866 /* print with null */
1867 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1868 if (ret != 2) /* drop super cleans up */
1869 return -EINVAL;
1870 /* then only advance past the last char */
1871 ptr += 2;
1872 }
1873
1874 return 0;
1875 }
1876
1877 static int ocfs2_initialize_super(struct super_block *sb,
1878 struct buffer_head *bh,
1879 int sector_size)
1880 {
1881 int status;
1882 int i, cbits, bbits;
1883 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1884 struct inode *inode = NULL;
1885 struct ocfs2_journal *journal;
1886 __le32 uuid_net_key;
1887 struct ocfs2_super *osb;
1888
1889 mlog_entry_void();
1890
1891 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1892 if (!osb) {
1893 status = -ENOMEM;
1894 mlog_errno(status);
1895 goto bail;
1896 }
1897
1898 sb->s_fs_info = osb;
1899 sb->s_op = &ocfs2_sops;
1900 sb->s_export_op = &ocfs2_export_ops;
1901 sb->s_qcop = &ocfs2_quotactl_ops;
1902 sb->dq_op = &ocfs2_quota_operations;
1903 sb->s_xattr = ocfs2_xattr_handlers;
1904 sb->s_time_gran = 1;
1905 sb->s_flags |= MS_NOATIME;
1906 /* this is needed to support O_LARGEFILE */
1907 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1908 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1909 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1910
1911 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
1912
1913 for (i = 0; i < 3; i++)
1914 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
1915 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1916
1917 osb->sb = sb;
1918 /* Save off for ocfs2_rw_direct */
1919 osb->s_sectsize_bits = blksize_bits(sector_size);
1920 BUG_ON(!osb->s_sectsize_bits);
1921
1922 spin_lock_init(&osb->dc_task_lock);
1923 init_waitqueue_head(&osb->dc_event);
1924 osb->dc_work_sequence = 0;
1925 osb->dc_wake_sequence = 0;
1926 INIT_LIST_HEAD(&osb->blocked_lock_list);
1927 osb->blocked_lock_count = 0;
1928 spin_lock_init(&osb->osb_lock);
1929 spin_lock_init(&osb->osb_xattr_lock);
1930 ocfs2_init_inode_steal_slot(osb);
1931
1932 atomic_set(&osb->alloc_stats.moves, 0);
1933 atomic_set(&osb->alloc_stats.local_data, 0);
1934 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1935 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1936 atomic_set(&osb->alloc_stats.bg_extends, 0);
1937
1938 ocfs2_init_node_maps(osb);
1939
1940 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1941 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1942
1943 status = ocfs2_recovery_init(osb);
1944 if (status) {
1945 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1946 mlog_errno(status);
1947 goto bail;
1948 }
1949
1950 init_waitqueue_head(&osb->checkpoint_event);
1951 atomic_set(&osb->needs_checkpoint, 0);
1952
1953 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1954
1955 osb->slot_num = OCFS2_INVALID_SLOT;
1956
1957 osb->s_xattr_inline_size = le16_to_cpu(
1958 di->id2.i_super.s_xattr_inline_size);
1959
1960 osb->local_alloc_state = OCFS2_LA_UNUSED;
1961 osb->local_alloc_bh = NULL;
1962 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
1963
1964 init_waitqueue_head(&osb->osb_mount_event);
1965
1966 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1967 if (!osb->vol_label) {
1968 mlog(ML_ERROR, "unable to alloc vol label\n");
1969 status = -ENOMEM;
1970 goto bail;
1971 }
1972
1973 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1974 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1975 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1976 osb->max_slots);
1977 status = -EINVAL;
1978 goto bail;
1979 }
1980 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1981
1982 osb->slot_recovery_generations =
1983 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1984 GFP_KERNEL);
1985 if (!osb->slot_recovery_generations) {
1986 status = -ENOMEM;
1987 mlog_errno(status);
1988 goto bail;
1989 }
1990
1991 init_waitqueue_head(&osb->osb_wipe_event);
1992 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1993 sizeof(*osb->osb_orphan_wipes),
1994 GFP_KERNEL);
1995 if (!osb->osb_orphan_wipes) {
1996 status = -ENOMEM;
1997 mlog_errno(status);
1998 goto bail;
1999 }
2000
2001 osb->s_feature_compat =
2002 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2003 osb->s_feature_ro_compat =
2004 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2005 osb->s_feature_incompat =
2006 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2007
2008 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2009 mlog(ML_ERROR, "couldn't mount because of unsupported "
2010 "optional features (%x).\n", i);
2011 status = -EINVAL;
2012 goto bail;
2013 }
2014 if (!(osb->sb->s_flags & MS_RDONLY) &&
2015 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2016 mlog(ML_ERROR, "couldn't mount RDWR because of "
2017 "unsupported optional features (%x).\n", i);
2018 status = -EINVAL;
2019 goto bail;
2020 }
2021
2022 if (ocfs2_userspace_stack(osb)) {
2023 memcpy(osb->osb_cluster_stack,
2024 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2025 OCFS2_STACK_LABEL_LEN);
2026 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2027 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2028 mlog(ML_ERROR,
2029 "couldn't mount because of an invalid "
2030 "cluster stack label (%s) \n",
2031 osb->osb_cluster_stack);
2032 status = -EINVAL;
2033 goto bail;
2034 }
2035 } else {
2036 /* The empty string is identical with classic tools that
2037 * don't know about s_cluster_info. */
2038 osb->osb_cluster_stack[0] = '\0';
2039 }
2040
2041 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2042
2043 /* FIXME
2044 * This should be done in ocfs2_journal_init(), but unknown
2045 * ordering issues will cause the filesystem to crash.
2046 * If anyone wants to figure out what part of the code
2047 * refers to osb->journal before ocfs2_journal_init() is run,
2048 * be my guest.
2049 */
2050 /* initialize our journal structure */
2051
2052 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2053 if (!journal) {
2054 mlog(ML_ERROR, "unable to alloc journal\n");
2055 status = -ENOMEM;
2056 goto bail;
2057 }
2058 osb->journal = journal;
2059 journal->j_osb = osb;
2060
2061 atomic_set(&journal->j_num_trans, 0);
2062 init_rwsem(&journal->j_trans_barrier);
2063 init_waitqueue_head(&journal->j_checkpointed);
2064 spin_lock_init(&journal->j_lock);
2065 journal->j_trans_id = (unsigned long) 1;
2066 INIT_LIST_HEAD(&journal->j_la_cleanups);
2067 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2068 journal->j_state = OCFS2_JOURNAL_FREE;
2069
2070 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2071 osb->dentry_lock_list = NULL;
2072
2073 /* get some pseudo constants for clustersize bits */
2074 osb->s_clustersize_bits =
2075 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2076 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2077 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2078
2079 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2080 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2081 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2082 osb->s_clustersize);
2083 status = -EINVAL;
2084 goto bail;
2085 }
2086
2087 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
2088 > (u32)~0UL) {
2089 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
2090 "what jbd can address in 32 bits.\n");
2091 status = -EINVAL;
2092 goto bail;
2093 }
2094
2095 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2096 sizeof(di->id2.i_super.s_uuid))) {
2097 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2098 status = -ENOMEM;
2099 goto bail;
2100 }
2101
2102 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2103
2104 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2105 osb->vol_label[63] = '\0';
2106 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2107 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2108 osb->first_cluster_group_blkno =
2109 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2110 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2111 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2112 mlog(0, "vol_label: %s\n", osb->vol_label);
2113 mlog(0, "uuid: %s\n", osb->uuid_str);
2114 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2115 (unsigned long long)osb->root_blkno,
2116 (unsigned long long)osb->system_dir_blkno);
2117
2118 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2119 if (!osb->osb_dlm_debug) {
2120 status = -ENOMEM;
2121 mlog_errno(status);
2122 goto bail;
2123 }
2124
2125 atomic_set(&osb->vol_state, VOLUME_INIT);
2126
2127 /* load root, system_dir, and all global system inodes */
2128 status = ocfs2_init_global_system_inodes(osb);
2129 if (status < 0) {
2130 mlog_errno(status);
2131 goto bail;
2132 }
2133
2134 /*
2135 * global bitmap
2136 */
2137 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2138 OCFS2_INVALID_SLOT);
2139 if (!inode) {
2140 status = -EINVAL;
2141 mlog_errno(status);
2142 goto bail;
2143 }
2144
2145 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2146 iput(inode);
2147
2148 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
2149
2150 status = ocfs2_init_slot_info(osb);
2151 if (status < 0) {
2152 mlog_errno(status);
2153 goto bail;
2154 }
2155
2156 bail:
2157 mlog_exit(status);
2158 return status;
2159 }
2160
2161 /*
2162 * will return: -EAGAIN if it is ok to keep searching for superblocks
2163 * -EINVAL if there is a bad superblock
2164 * 0 on success
2165 */
2166 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2167 struct buffer_head *bh,
2168 u32 blksz)
2169 {
2170 int status = -EAGAIN;
2171
2172 mlog_entry_void();
2173
2174 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2175 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2176 /* We have to do a raw check of the feature here */
2177 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2178 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2179 status = ocfs2_block_check_validate(bh->b_data,
2180 bh->b_size,
2181 &di->i_check);
2182 if (status)
2183 goto out;
2184 }
2185 status = -EINVAL;
2186 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2187 mlog(ML_ERROR, "found superblock with incorrect block "
2188 "size: found %u, should be %u\n",
2189 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2190 blksz);
2191 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2192 OCFS2_MAJOR_REV_LEVEL ||
2193 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2194 OCFS2_MINOR_REV_LEVEL) {
2195 mlog(ML_ERROR, "found superblock with bad version: "
2196 "found %u.%u, should be %u.%u\n",
2197 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2198 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2199 OCFS2_MAJOR_REV_LEVEL,
2200 OCFS2_MINOR_REV_LEVEL);
2201 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2202 mlog(ML_ERROR, "bad block number on superblock: "
2203 "found %llu, should be %llu\n",
2204 (unsigned long long)le64_to_cpu(di->i_blkno),
2205 (unsigned long long)bh->b_blocknr);
2206 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2207 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2208 mlog(ML_ERROR, "bad cluster size found: %u\n",
2209 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2210 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2211 mlog(ML_ERROR, "bad root_blkno: 0\n");
2212 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2213 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2214 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2215 mlog(ML_ERROR,
2216 "Superblock slots found greater than file system "
2217 "maximum: found %u, max %u\n",
2218 le16_to_cpu(di->id2.i_super.s_max_slots),
2219 OCFS2_MAX_SLOTS);
2220 } else {
2221 /* found it! */
2222 status = 0;
2223 }
2224 }
2225
2226 out:
2227 mlog_exit(status);
2228 return status;
2229 }
2230
2231 static int ocfs2_check_volume(struct ocfs2_super *osb)
2232 {
2233 int status;
2234 int dirty;
2235 int local;
2236 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2237 * recover
2238 * ourselves. */
2239
2240 mlog_entry_void();
2241
2242 /* Init our journal object. */
2243 status = ocfs2_journal_init(osb->journal, &dirty);
2244 if (status < 0) {
2245 mlog(ML_ERROR, "Could not initialize journal!\n");
2246 goto finally;
2247 }
2248
2249 /* If the journal was unmounted cleanly then we don't want to
2250 * recover anything. Otherwise, journal_load will do that
2251 * dirty work for us :) */
2252 if (!dirty) {
2253 status = ocfs2_journal_wipe(osb->journal, 0);
2254 if (status < 0) {
2255 mlog_errno(status);
2256 goto finally;
2257 }
2258 } else {
2259 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2260 "recovering volume.\n");
2261 }
2262
2263 local = ocfs2_mount_local(osb);
2264
2265 /* will play back anything left in the journal. */
2266 status = ocfs2_journal_load(osb->journal, local, dirty);
2267 if (status < 0) {
2268 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2269 goto finally;
2270 }
2271
2272 if (dirty) {
2273 /* recover my local alloc if we didn't unmount cleanly. */
2274 status = ocfs2_begin_local_alloc_recovery(osb,
2275 osb->slot_num,
2276 &local_alloc);
2277 if (status < 0) {
2278 mlog_errno(status);
2279 goto finally;
2280 }
2281 /* we complete the recovery process after we've marked
2282 * ourselves as mounted. */
2283 }
2284
2285 mlog(0, "Journal loaded.\n");
2286
2287 status = ocfs2_load_local_alloc(osb);
2288 if (status < 0) {
2289 mlog_errno(status);
2290 goto finally;
2291 }
2292
2293 if (dirty) {
2294 /* Recovery will be completed after we've mounted the
2295 * rest of the volume. */
2296 osb->dirty = 1;
2297 osb->local_alloc_copy = local_alloc;
2298 local_alloc = NULL;
2299 }
2300
2301 /* go through each journal, trylock it and if you get the
2302 * lock, and it's marked as dirty, set the bit in the recover
2303 * map and launch a recovery thread for it. */
2304 status = ocfs2_mark_dead_nodes(osb);
2305 if (status < 0) {
2306 mlog_errno(status);
2307 goto finally;
2308 }
2309
2310 status = ocfs2_compute_replay_slots(osb);
2311 if (status < 0)
2312 mlog_errno(status);
2313
2314 finally:
2315 if (local_alloc)
2316 kfree(local_alloc);
2317
2318 mlog_exit(status);
2319 return status;
2320 }
2321
2322 /*
2323 * The routine gets called from dismount or close whenever a dismount on
2324 * volume is requested and the osb open count becomes 1.
2325 * It will remove the osb from the global list and also free up all the
2326 * initialized resources and fileobject.
2327 */
2328 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2329 {
2330 mlog_entry_void();
2331
2332 /* This function assumes that the caller has the main osb resource */
2333
2334 ocfs2_free_slot_info(osb);
2335
2336 kfree(osb->osb_orphan_wipes);
2337 kfree(osb->slot_recovery_generations);
2338 /* FIXME
2339 * This belongs in journal shutdown, but because we have to
2340 * allocate osb->journal at the start of ocfs2_initalize_osb(),
2341 * we free it here.
2342 */
2343 kfree(osb->journal);
2344 if (osb->local_alloc_copy)
2345 kfree(osb->local_alloc_copy);
2346 kfree(osb->uuid_str);
2347 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2348 memset(osb, 0, sizeof(struct ocfs2_super));
2349
2350 mlog_exit_void();
2351 }
2352
2353 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2354 * panic(). We do not support continue-on-error operation. */
2355 static void ocfs2_handle_error(struct super_block *sb)
2356 {
2357 struct ocfs2_super *osb = OCFS2_SB(sb);
2358
2359 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2360 panic("OCFS2: (device %s): panic forced after error\n",
2361 sb->s_id);
2362
2363 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2364
2365 if (sb->s_flags & MS_RDONLY &&
2366 (ocfs2_is_soft_readonly(osb) ||
2367 ocfs2_is_hard_readonly(osb)))
2368 return;
2369
2370 printk(KERN_CRIT "File system is now read-only due to the potential "
2371 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2372 "system is unmounted.\n");
2373 sb->s_flags |= MS_RDONLY;
2374 ocfs2_set_ro_flag(osb, 0);
2375 }
2376
2377 static char error_buf[1024];
2378
2379 void __ocfs2_error(struct super_block *sb,
2380 const char *function,
2381 const char *fmt, ...)
2382 {
2383 va_list args;
2384
2385 va_start(args, fmt);
2386 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2387 va_end(args);
2388
2389 /* Not using mlog here because we want to show the actual
2390 * function the error came from. */
2391 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2392 sb->s_id, function, error_buf);
2393
2394 ocfs2_handle_error(sb);
2395 }
2396
2397 /* Handle critical errors. This is intentionally more drastic than
2398 * ocfs2_handle_error, so we only use for things like journal errors,
2399 * etc. */
2400 void __ocfs2_abort(struct super_block* sb,
2401 const char *function,
2402 const char *fmt, ...)
2403 {
2404 va_list args;
2405
2406 va_start(args, fmt);
2407 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2408 va_end(args);
2409
2410 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2411 sb->s_id, function, error_buf);
2412
2413 /* We don't have the cluster support yet to go straight to
2414 * hard readonly in here. Until then, we want to keep
2415 * ocfs2_abort() so that we can at least mark critical
2416 * errors.
2417 *
2418 * TODO: This should abort the journal and alert other nodes
2419 * that our slot needs recovery. */
2420
2421 /* Force a panic(). This stinks, but it's better than letting
2422 * things continue without having a proper hard readonly
2423 * here. */
2424 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2425 ocfs2_handle_error(sb);
2426 }
2427
2428 module_init(ocfs2_init);
2429 module_exit(ocfs2_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree