?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
cxgb4vf: add call to Firmware to reset VF State.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ocfs2 / super.c
blob56f0cb3958209b944ecb07a3a8262efc3b9aa75d
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/init.h>
32 #include <linux/random.h>
33 #include <linux/statfs.h>
34 #include <linux/moduleparam.h>
35 #include <linux/blkdev.h>
36 #include <linux/socket.h>
37 #include <linux/inet.h>
38 #include <linux/parser.h>
39 #include <linux/crc32.h>
40 #include <linux/debugfs.h>
41 #include <linux/mount.h>
42 #include <linux/seq_file.h>
43 #include <linux/quotaops.h>
44 #include <linux/smp_lock.h>
45
46 #define MLOG_MASK_PREFIX ML_SUPER
47 #include <cluster/masklog.h>
48
49 #include "ocfs2.h"
50
51 /* this should be the only file to include a version 1 header */
52 #include "ocfs1_fs_compat.h"
53
54 #include "alloc.h"
55 #include "blockcheck.h"
56 #include "dlmglue.h"
57 #include "export.h"
58 #include "extent_map.h"
59 #include "heartbeat.h"
60 #include "inode.h"
61 #include "journal.h"
62 #include "localalloc.h"
63 #include "namei.h"
64 #include "slot_map.h"
65 #include "super.h"
66 #include "sysfile.h"
67 #include "uptodate.h"
68 #include "ver.h"
69 #include "xattr.h"
70 #include "quota.h"
71 #include "refcounttree.h"
72 #include "suballoc.h"
73
74 #include "buffer_head_io.h"
75
76 static struct kmem_cache *ocfs2_inode_cachep = NULL;
77 struct kmem_cache *ocfs2_dquot_cachep;
78 struct kmem_cache *ocfs2_qf_chunk_cachep;
79
80 /* OCFS2 needs to schedule several differnt types of work which
81 * require cluster locking, disk I/O, recovery waits, etc. Since these
82 * types of work tend to be heavy we avoid using the kernel events
83 * workqueue and schedule on our own. */
84 struct workqueue_struct *ocfs2_wq = NULL;
85
86 static struct dentry *ocfs2_debugfs_root = NULL;
87
88 MODULE_AUTHOR("Oracle");
89 MODULE_LICENSE("GPL");
90
91 struct mount_options
92 {
93 unsigned long commit_interval;
94 unsigned long mount_opt;
95 unsigned int atime_quantum;
96 signed short slot;
97 int localalloc_opt;
98 unsigned int resv_level;
99 int dir_resv_level;
100 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
101 };
102
103 static int ocfs2_parse_options(struct super_block *sb, char *options,
104 struct mount_options *mopt,
105 int is_remount);
106 static int ocfs2_check_set_options(struct super_block *sb,
107 struct mount_options *options);
108 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
109 static void ocfs2_put_super(struct super_block *sb);
110 static int ocfs2_mount_volume(struct super_block *sb);
111 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
112 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
113 static int ocfs2_initialize_mem_caches(void);
114 static void ocfs2_free_mem_caches(void);
115 static void ocfs2_delete_osb(struct ocfs2_super *osb);
116
117 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
118
119 static int ocfs2_sync_fs(struct super_block *sb, int wait);
120
121 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
122 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
123 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
124 static int ocfs2_check_volume(struct ocfs2_super *osb);
125 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
126 struct buffer_head *bh,
127 u32 sectsize,
128 struct ocfs2_blockcheck_stats *stats);
129 static int ocfs2_initialize_super(struct super_block *sb,
130 struct buffer_head *bh,
131 int sector_size,
132 struct ocfs2_blockcheck_stats *stats);
133 static int ocfs2_get_sector(struct super_block *sb,
134 struct buffer_head **bh,
135 int block,
136 int sect_size);
137 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
138 static void ocfs2_destroy_inode(struct inode *inode);
139 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
140 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
141 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
142
143 static const struct super_operations ocfs2_sops = {
144 .statfs = ocfs2_statfs,
145 .alloc_inode = ocfs2_alloc_inode,
146 .destroy_inode = ocfs2_destroy_inode,
147 .drop_inode = ocfs2_drop_inode,
148 .evict_inode = ocfs2_evict_inode,
149 .sync_fs = ocfs2_sync_fs,
150 .put_super = ocfs2_put_super,
151 .remount_fs = ocfs2_remount,
152 .show_options = ocfs2_show_options,
153 .quota_read = ocfs2_quota_read,
154 .quota_write = ocfs2_quota_write,
155 };
156
157 enum {
158 Opt_barrier,
159 Opt_err_panic,
160 Opt_err_ro,
161 Opt_intr,
162 Opt_nointr,
163 Opt_hb_none,
164 Opt_hb_local,
165 Opt_hb_global,
166 Opt_data_ordered,
167 Opt_data_writeback,
168 Opt_atime_quantum,
169 Opt_slot,
170 Opt_commit,
171 Opt_localalloc,
172 Opt_localflocks,
173 Opt_stack,
174 Opt_user_xattr,
175 Opt_nouser_xattr,
176 Opt_inode64,
177 Opt_acl,
178 Opt_noacl,
179 Opt_usrquota,
180 Opt_grpquota,
181 Opt_coherency_buffered,
182 Opt_coherency_full,
183 Opt_resv_level,
184 Opt_dir_resv_level,
185 Opt_err,
186 };
187
188 static const match_table_t tokens = {
189 {Opt_barrier, "barrier=%u"},
190 {Opt_err_panic, "errors=panic"},
191 {Opt_err_ro, "errors=remount-ro"},
192 {Opt_intr, "intr"},
193 {Opt_nointr, "nointr"},
194 {Opt_hb_none, OCFS2_HB_NONE},
195 {Opt_hb_local, OCFS2_HB_LOCAL},
196 {Opt_hb_global, OCFS2_HB_GLOBAL},
197 {Opt_data_ordered, "data=ordered"},
198 {Opt_data_writeback, "data=writeback"},
199 {Opt_atime_quantum, "atime_quantum=%u"},
200 {Opt_slot, "preferred_slot=%u"},
201 {Opt_commit, "commit=%u"},
202 {Opt_localalloc, "localalloc=%d"},
203 {Opt_localflocks, "localflocks"},
204 {Opt_stack, "cluster_stack=%s"},
205 {Opt_user_xattr, "user_xattr"},
206 {Opt_nouser_xattr, "nouser_xattr"},
207 {Opt_inode64, "inode64"},
208 {Opt_acl, "acl"},
209 {Opt_noacl, "noacl"},
210 {Opt_usrquota, "usrquota"},
211 {Opt_grpquota, "grpquota"},
212 {Opt_coherency_buffered, "coherency=buffered"},
213 {Opt_coherency_full, "coherency=full"},
214 {Opt_resv_level, "resv_level=%u"},
215 {Opt_dir_resv_level, "dir_resv_level=%u"},
216 {Opt_err, NULL}
217 };
218
219 #ifdef CONFIG_DEBUG_FS
220 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
221 {
222 struct ocfs2_cluster_connection *cconn = osb->cconn;
223 struct ocfs2_recovery_map *rm = osb->recovery_map;
224 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
225 int i, out = 0;
226
227 out += snprintf(buf + out, len - out,
228 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
229 "Device", osb->dev_str, osb->uuid_str,
230 osb->fs_generation, osb->vol_label);
231
232 out += snprintf(buf + out, len - out,
233 "%10s => State: %d Flags: 0x%lX\n", "Volume",
234 atomic_read(&osb->vol_state), osb->osb_flags);
235
236 out += snprintf(buf + out, len - out,
237 "%10s => Block: %lu Cluster: %d\n", "Sizes",
238 osb->sb->s_blocksize, osb->s_clustersize);
239
240 out += snprintf(buf + out, len - out,
241 "%10s => Compat: 0x%X Incompat: 0x%X "
242 "ROcompat: 0x%X\n",
243 "Features", osb->s_feature_compat,
244 osb->s_feature_incompat, osb->s_feature_ro_compat);
245
246 out += snprintf(buf + out, len - out,
247 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
248 osb->s_mount_opt, osb->s_atime_quantum);
249
250 if (cconn) {
251 out += snprintf(buf + out, len - out,
252 "%10s => Stack: %s Name: %*s "
253 "Version: %d.%d\n", "Cluster",
254 (*osb->osb_cluster_stack == '\0' ?
255 "o2cb" : osb->osb_cluster_stack),
256 cconn->cc_namelen, cconn->cc_name,
257 cconn->cc_version.pv_major,
258 cconn->cc_version.pv_minor);
259 }
260
261 spin_lock(&osb->dc_task_lock);
262 out += snprintf(buf + out, len - out,
263 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
264 "WorkSeq: %lu\n", "DownCnvt",
265 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
266 osb->blocked_lock_count, osb->dc_wake_sequence,
267 osb->dc_work_sequence);
268 spin_unlock(&osb->dc_task_lock);
269
270 spin_lock(&osb->osb_lock);
271 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
272 "Recovery",
273 (osb->recovery_thread_task ?
274 task_pid_nr(osb->recovery_thread_task) : -1));
275 if (rm->rm_used == 0)
276 out += snprintf(buf + out, len - out, " None\n");
277 else {
278 for (i = 0; i < rm->rm_used; i++)
279 out += snprintf(buf + out, len - out, " %d",
280 rm->rm_entries[i]);
281 out += snprintf(buf + out, len - out, "\n");
282 }
283 spin_unlock(&osb->osb_lock);
284
285 out += snprintf(buf + out, len - out,
286 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
287 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
288 osb->osb_commit_interval,
289 atomic_read(&osb->needs_checkpoint));
290
291 out += snprintf(buf + out, len - out,
292 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
293 "Journal", osb->journal->j_state,
294 osb->journal->j_trans_id,
295 atomic_read(&osb->journal->j_num_trans));
296
297 out += snprintf(buf + out, len - out,
298 "%10s => GlobalAllocs: %d LocalAllocs: %d "
299 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
300 "Stats",
301 atomic_read(&osb->alloc_stats.bitmap_data),
302 atomic_read(&osb->alloc_stats.local_data),
303 atomic_read(&osb->alloc_stats.bg_allocs),
304 atomic_read(&osb->alloc_stats.moves),
305 atomic_read(&osb->alloc_stats.bg_extends));
306
307 out += snprintf(buf + out, len - out,
308 "%10s => State: %u Descriptor: %llu Size: %u bits "
309 "Default: %u bits\n",
310 "LocalAlloc", osb->local_alloc_state,
311 (unsigned long long)osb->la_last_gd,
312 osb->local_alloc_bits, osb->local_alloc_default_bits);
313
314 spin_lock(&osb->osb_lock);
315 out += snprintf(buf + out, len - out,
316 "%10s => InodeSlot: %d StolenInodes: %d, "
317 "MetaSlot: %d StolenMeta: %d\n", "Steal",
318 osb->s_inode_steal_slot,
319 atomic_read(&osb->s_num_inodes_stolen),
320 osb->s_meta_steal_slot,
321 atomic_read(&osb->s_num_meta_stolen));
322 spin_unlock(&osb->osb_lock);
323
324 out += snprintf(buf + out, len - out, "OrphanScan => ");
325 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
326 os->os_count, os->os_seqno);
327 out += snprintf(buf + out, len - out, " Last Scan: ");
328 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
329 out += snprintf(buf + out, len - out, "Disabled\n");
330 else
331 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
332 (get_seconds() - os->os_scantime.tv_sec));
333
334 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
335 "Slots", "Num", "RecoGen");
336 for (i = 0; i < osb->max_slots; ++i) {
337 out += snprintf(buf + out, len - out,
338 "%10s %c %3d %10d\n",
339 " ",
340 (i == osb->slot_num ? '*' : ' '),
341 i, osb->slot_recovery_generations[i]);
342 }
343
344 return out;
345 }
346
347 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
348 {
349 struct ocfs2_super *osb = inode->i_private;
350 char *buf = NULL;
351
352 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
353 if (!buf)
354 goto bail;
355
356 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
357
358 file->private_data = buf;
359
360 return 0;
361 bail:
362 return -ENOMEM;
363 }
364
365 static int ocfs2_debug_release(struct inode *inode, struct file *file)
366 {
367 kfree(file->private_data);
368 return 0;
369 }
370
371 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
372 size_t nbytes, loff_t *ppos)
373 {
374 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
375 i_size_read(file->f_mapping->host));
376 }
377 #else
378 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
379 {
380 return 0;
381 }
382 static int ocfs2_debug_release(struct inode *inode, struct file *file)
383 {
384 return 0;
385 }
386 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
387 size_t nbytes, loff_t *ppos)
388 {
389 return 0;
390 }
391 #endif /* CONFIG_DEBUG_FS */
392
393 static const struct file_operations ocfs2_osb_debug_fops = {
394 .open = ocfs2_osb_debug_open,
395 .release = ocfs2_debug_release,
396 .read = ocfs2_debug_read,
397 .llseek = generic_file_llseek,
398 };
399
400 static int ocfs2_sync_fs(struct super_block *sb, int wait)
401 {
402 int status;
403 tid_t target;
404 struct ocfs2_super *osb = OCFS2_SB(sb);
405
406 if (ocfs2_is_hard_readonly(osb))
407 return -EROFS;
408
409 if (wait) {
410 status = ocfs2_flush_truncate_log(osb);
411 if (status < 0)
412 mlog_errno(status);
413 } else {
414 ocfs2_schedule_truncate_log_flush(osb, 0);
415 }
416
417 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
418 &target)) {
419 if (wait)
420 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
421 target);
422 }
423 return 0;
424 }
425
426 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
427 {
428 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
429 && (ino == USER_QUOTA_SYSTEM_INODE
430 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
431 return 0;
432 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
433 && (ino == GROUP_QUOTA_SYSTEM_INODE
434 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
435 return 0;
436 return 1;
437 }
438
439 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
440 {
441 struct inode *new = NULL;
442 int status = 0;
443 int i;
444
445 mlog_entry_void();
446
447 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
448 if (IS_ERR(new)) {
449 status = PTR_ERR(new);
450 mlog_errno(status);
451 goto bail;
452 }
453 osb->root_inode = new;
454
455 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
456 if (IS_ERR(new)) {
457 status = PTR_ERR(new);
458 mlog_errno(status);
459 goto bail;
460 }
461 osb->sys_root_inode = new;
462
463 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
464 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
465 if (!ocfs2_need_system_inode(osb, i))
466 continue;
467 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
468 if (!new) {
469 ocfs2_release_system_inodes(osb);
470 status = -EINVAL;
471 mlog_errno(status);
472 /* FIXME: Should ERROR_RO_FS */
473 mlog(ML_ERROR, "Unable to load system inode %d, "
474 "possibly corrupt fs?", i);
475 goto bail;
476 }
477 // the array now has one ref, so drop this one
478 iput(new);
479 }
480
481 bail:
482 mlog_exit(status);
483 return status;
484 }
485
486 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
487 {
488 struct inode *new = NULL;
489 int status = 0;
490 int i;
491
492 mlog_entry_void();
493
494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
495 i < NUM_SYSTEM_INODES;
496 i++) {
497 if (!ocfs2_need_system_inode(osb, i))
498 continue;
499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
500 if (!new) {
501 ocfs2_release_system_inodes(osb);
502 status = -EINVAL;
503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
504 status, i, osb->slot_num);
505 goto bail;
506 }
507 /* the array now has one ref, so drop this one */
508 iput(new);
509 }
510
511 bail:
512 mlog_exit(status);
513 return status;
514 }
515
516 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
517 {
518 int i;
519 struct inode *inode;
520
521 mlog_entry_void();
522
523 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
524 inode = osb->global_system_inodes[i];
525 if (inode) {
526 iput(inode);
527 osb->global_system_inodes[i] = NULL;
528 }
529 }
530
531 inode = osb->sys_root_inode;
532 if (inode) {
533 iput(inode);
534 osb->sys_root_inode = NULL;
535 }
536
537 inode = osb->root_inode;
538 if (inode) {
539 iput(inode);
540 osb->root_inode = NULL;
541 }
542
543 if (!osb->local_system_inodes)
544 goto out;
545
546 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
547 if (osb->local_system_inodes[i]) {
548 iput(osb->local_system_inodes[i]);
549 osb->local_system_inodes[i] = NULL;
550 }
551 }
552
553 kfree(osb->local_system_inodes);
554 osb->local_system_inodes = NULL;
555
556 out:
557 mlog_exit(0);
558 }
559
560 /* We're allocating fs objects, use GFP_NOFS */
561 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
562 {
563 struct ocfs2_inode_info *oi;
564
565 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
566 if (!oi)
567 return NULL;
568
569 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
570 return &oi->vfs_inode;
571 }
572
573 static void ocfs2_destroy_inode(struct inode *inode)
574 {
575 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
576 }
577
578 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
579 unsigned int cbits)
580 {
581 unsigned int bytes = 1 << cbits;
582 unsigned int trim = bytes;
583 unsigned int bitshift = 32;
584
585 /*
586 * i_size and all block offsets in ocfs2 are always 64 bits
587 * wide. i_clusters is 32 bits, in cluster-sized units. So on
588 * 64 bit platforms, cluster size will be the limiting factor.
589 */
590
591 #if BITS_PER_LONG == 32
592 # if defined(CONFIG_LBDAF)
593 BUILD_BUG_ON(sizeof(sector_t) != 8);
594 /*
595 * We might be limited by page cache size.
596 */
597 if (bytes > PAGE_CACHE_SIZE) {
598 bytes = PAGE_CACHE_SIZE;
599 trim = 1;
600 /*
601 * Shift by 31 here so that we don't get larger than
602 * MAX_LFS_FILESIZE
603 */
604 bitshift = 31;
605 }
606 # else
607 /*
608 * We are limited by the size of sector_t. Use block size, as
609 * that's what we expose to the VFS.
610 */
611 bytes = 1 << bbits;
612 trim = 1;
613 bitshift = 31;
614 # endif
615 #endif
616
617 /*
618 * Trim by a whole cluster when we can actually approach the
619 * on-disk limits. Otherwise we can overflow i_clusters when
620 * an extent start is at the max offset.
621 */
622 return (((unsigned long long)bytes) << bitshift) - trim;
623 }
624
625 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
626 {
627 int incompat_features;
628 int ret = 0;
629 struct mount_options parsed_options;
630 struct ocfs2_super *osb = OCFS2_SB(sb);
631 u32 tmp;
632
633 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
634 !ocfs2_check_set_options(sb, &parsed_options)) {
635 ret = -EINVAL;
636 goto out;
637 }
638
639 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
640 OCFS2_MOUNT_HB_NONE;
641 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
642 ret = -EINVAL;
643 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
644 goto out;
645 }
646
647 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
648 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
649 ret = -EINVAL;
650 mlog(ML_ERROR, "Cannot change data mode on remount\n");
651 goto out;
652 }
653
654 /* Probably don't want this on remount; it might
655 * mess with other nodes */
656 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
657 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
658 ret = -EINVAL;
659 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
660 goto out;
661 }
662
663 /* We're going to/from readonly mode. */
664 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
665 /* Disable quota accounting before remounting RO */
666 if (*flags & MS_RDONLY) {
667 ret = ocfs2_susp_quotas(osb, 0);
668 if (ret < 0)
669 goto out;
670 }
671 /* Lock here so the check of HARD_RO and the potential
672 * setting of SOFT_RO is atomic. */
673 spin_lock(&osb->osb_lock);
674 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
675 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
676 ret = -EROFS;
677 goto unlock_osb;
678 }
679
680 if (*flags & MS_RDONLY) {
681 mlog(0, "Going to ro mode.\n");
682 sb->s_flags |= MS_RDONLY;
683 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
684 } else {
685 mlog(0, "Making ro filesystem writeable.\n");
686
687 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
688 mlog(ML_ERROR, "Cannot remount RDWR "
689 "filesystem due to previous errors.\n");
690 ret = -EROFS;
691 goto unlock_osb;
692 }
693 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
694 if (incompat_features) {
695 mlog(ML_ERROR, "Cannot remount RDWR because "
696 "of unsupported optional features "
697 "(%x).\n", incompat_features);
698 ret = -EINVAL;
699 goto unlock_osb;
700 }
701 sb->s_flags &= ~MS_RDONLY;
702 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
703 }
704 unlock_osb:
705 spin_unlock(&osb->osb_lock);
706 /* Enable quota accounting after remounting RW */
707 if (!ret && !(*flags & MS_RDONLY)) {
708 if (sb_any_quota_suspended(sb))
709 ret = ocfs2_susp_quotas(osb, 1);
710 else
711 ret = ocfs2_enable_quotas(osb);
712 if (ret < 0) {
713 /* Return back changes... */
714 spin_lock(&osb->osb_lock);
715 sb->s_flags |= MS_RDONLY;
716 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
717 spin_unlock(&osb->osb_lock);
718 goto out;
719 }
720 }
721 }
722
723 if (!ret) {
724 /* Only save off the new mount options in case of a successful
725 * remount. */
726 osb->s_mount_opt = parsed_options.mount_opt;
727 osb->s_atime_quantum = parsed_options.atime_quantum;
728 osb->preferred_slot = parsed_options.slot;
729 if (parsed_options.commit_interval)
730 osb->osb_commit_interval = parsed_options.commit_interval;
731
732 if (!ocfs2_is_hard_readonly(osb))
733 ocfs2_set_journal_params(osb);
734
735 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
736 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
737 MS_POSIXACL : 0);
738 }
739 out:
740 return ret;
741 }
742
743 static int ocfs2_sb_probe(struct super_block *sb,
744 struct buffer_head **bh,
745 int *sector_size,
746 struct ocfs2_blockcheck_stats *stats)
747 {
748 int status, tmpstat;
749 struct ocfs1_vol_disk_hdr *hdr;
750 struct ocfs2_dinode *di;
751 int blksize;
752
753 *bh = NULL;
754
755 /* may be > 512 */
756 *sector_size = bdev_logical_block_size(sb->s_bdev);
757 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
758 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
759 *sector_size, OCFS2_MAX_BLOCKSIZE);
760 status = -EINVAL;
761 goto bail;
762 }
763
764 /* Can this really happen? */
765 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
766 *sector_size = OCFS2_MIN_BLOCKSIZE;
767
768 /* check block zero for old format */
769 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
770 if (status < 0) {
771 mlog_errno(status);
772 goto bail;
773 }
774 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
775 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
776 mlog(ML_ERROR, "incompatible version: %u.%u\n",
777 hdr->major_version, hdr->minor_version);
778 status = -EINVAL;
779 }
780 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
781 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
782 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
783 hdr->signature);
784 status = -EINVAL;
785 }
786 brelse(*bh);
787 *bh = NULL;
788 if (status < 0) {
789 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
790 "upgraded before mounting with ocfs v2\n");
791 goto bail;
792 }
793
794 /*
795 * Now check at magic offset for 512, 1024, 2048, 4096
796 * blocksizes. 4096 is the maximum blocksize because it is
797 * the minimum clustersize.
798 */
799 status = -EINVAL;
800 for (blksize = *sector_size;
801 blksize <= OCFS2_MAX_BLOCKSIZE;
802 blksize <<= 1) {
803 tmpstat = ocfs2_get_sector(sb, bh,
804 OCFS2_SUPER_BLOCK_BLKNO,
805 blksize);
806 if (tmpstat < 0) {
807 status = tmpstat;
808 mlog_errno(status);
809 break;
810 }
811 di = (struct ocfs2_dinode *) (*bh)->b_data;
812 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
813 spin_lock_init(&stats->b_lock);
814 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
815 if (tmpstat < 0) {
816 brelse(*bh);
817 *bh = NULL;
818 }
819 if (tmpstat != -EAGAIN) {
820 status = tmpstat;
821 break;
822 }
823 }
824
825 bail:
826 return status;
827 }
828
829 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
830 {
831 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
832
833 if (osb->s_mount_opt & hb_enabled) {
834 if (ocfs2_mount_local(osb)) {
835 mlog(ML_ERROR, "Cannot heartbeat on a locally "
836 "mounted device.\n");
837 return -EINVAL;
838 }
839 if (ocfs2_userspace_stack(osb)) {
840 mlog(ML_ERROR, "Userspace stack expected, but "
841 "o2cb heartbeat arguments passed to mount\n");
842 return -EINVAL;
843 }
844 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
845 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
846 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
847 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
848 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
849 return -EINVAL;
850 }
851 }
852
853 if (!(osb->s_mount_opt & hb_enabled)) {
854 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
855 !ocfs2_userspace_stack(osb)) {
856 mlog(ML_ERROR, "Heartbeat has to be started to mount "
857 "a read-write clustered device.\n");
858 return -EINVAL;
859 }
860 }
861
862 return 0;
863 }
864
865 /*
866 * If we're using a userspace stack, mount should have passed
867 * a name that matches the disk. If not, mount should not
868 * have passed a stack.
869 */
870 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
871 struct mount_options *mopt)
872 {
873 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
874 mlog(ML_ERROR,
875 "cluster stack passed to mount, but this filesystem "
876 "does not support it\n");
877 return -EINVAL;
878 }
879
880 if (ocfs2_userspace_stack(osb) &&
881 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
882 OCFS2_STACK_LABEL_LEN)) {
883 mlog(ML_ERROR,
884 "cluster stack passed to mount (\"%s\") does not "
885 "match the filesystem (\"%s\")\n",
886 mopt->cluster_stack,
887 osb->osb_cluster_stack);
888 return -EINVAL;
889 }
890
891 return 0;
892 }
893
894 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
895 {
896 int type;
897 struct super_block *sb = osb->sb;
898 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
899 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
900 int status = 0;
901
902 for (type = 0; type < MAXQUOTAS; type++) {
903 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
904 continue;
905 if (unsuspend)
906 status = dquot_resume(sb, type);
907 else {
908 struct ocfs2_mem_dqinfo *oinfo;
909
910 /* Cancel periodic syncing before suspending */
911 oinfo = sb_dqinfo(sb, type)->dqi_priv;
912 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
913 status = dquot_suspend(sb, type);
914 }
915 if (status < 0)
916 break;
917 }
918 if (status < 0)
919 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
920 "remount (error = %d).\n", status);
921 return status;
922 }
923
924 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
925 {
926 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
927 struct super_block *sb = osb->sb;
928 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
929 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
930 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
931 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
932 int status;
933 int type;
934
935 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
936 for (type = 0; type < MAXQUOTAS; type++) {
937 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
938 continue;
939 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
940 osb->slot_num);
941 if (!inode[type]) {
942 status = -ENOENT;
943 goto out_quota_off;
944 }
945 status = dquot_enable(inode[type], type, QFMT_OCFS2,
946 DQUOT_USAGE_ENABLED);
947 if (status < 0)
948 goto out_quota_off;
949 }
950
951 for (type = 0; type < MAXQUOTAS; type++)
952 iput(inode[type]);
953 return 0;
954 out_quota_off:
955 ocfs2_disable_quotas(osb);
956 for (type = 0; type < MAXQUOTAS; type++)
957 iput(inode[type]);
958 mlog_errno(status);
959 return status;
960 }
961
962 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
963 {
964 int type;
965 struct inode *inode;
966 struct super_block *sb = osb->sb;
967 struct ocfs2_mem_dqinfo *oinfo;
968
969 /* We mostly ignore errors in this function because there's not much
970 * we can do when we see them */
971 for (type = 0; type < MAXQUOTAS; type++) {
972 if (!sb_has_quota_loaded(sb, type))
973 continue;
974 /* Cancel periodic syncing before we grab dqonoff_mutex */
975 oinfo = sb_dqinfo(sb, type)->dqi_priv;
976 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
977 inode = igrab(sb->s_dquot.files[type]);
978 /* Turn off quotas. This will remove all dquot structures from
979 * memory and so they will be automatically synced to global
980 * quota files */
981 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
982 DQUOT_LIMITS_ENABLED);
983 if (!inode)
984 continue;
985 iput(inode);
986 }
987 }
988
989 /* Handle quota on quotactl */
990 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
991 char *path)
992 {
993 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
994 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
995
996 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
997 return -EINVAL;
998
999 return dquot_enable(sb_dqopt(sb)->files[type], type,
1000 format_id, DQUOT_LIMITS_ENABLED);
1001 }
1002
1003 /* Handle quota off quotactl */
1004 static int ocfs2_quota_off(struct super_block *sb, int type)
1005 {
1006 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1007 }
1008
1009 static const struct quotactl_ops ocfs2_quotactl_ops = {
1010 .quota_on = ocfs2_quota_on,
1011 .quota_off = ocfs2_quota_off,
1012 .quota_sync = dquot_quota_sync,
1013 .get_info = dquot_get_dqinfo,
1014 .set_info = dquot_set_dqinfo,
1015 .get_dqblk = dquot_get_dqblk,
1016 .set_dqblk = dquot_set_dqblk,
1017 };
1018
1019 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1020 {
1021 struct dentry *root;
1022 int status, sector_size;
1023 struct mount_options parsed_options;
1024 struct inode *inode = NULL;
1025 struct ocfs2_super *osb = NULL;
1026 struct buffer_head *bh = NULL;
1027 char nodestr[8];
1028 struct ocfs2_blockcheck_stats stats;
1029
1030 mlog_entry("%p, %p, %i", sb, data, silent);
1031
1032 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1033 status = -EINVAL;
1034 goto read_super_error;
1035 }
1036
1037 /* probe for superblock */
1038 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1039 if (status < 0) {
1040 mlog(ML_ERROR, "superblock probe failed!\n");
1041 goto read_super_error;
1042 }
1043
1044 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1045 osb = OCFS2_SB(sb);
1046 if (status < 0) {
1047 mlog_errno(status);
1048 goto read_super_error;
1049 }
1050 brelse(bh);
1051 bh = NULL;
1052
1053 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1054 status = -EINVAL;
1055 goto read_super_error;
1056 }
1057 osb->s_mount_opt = parsed_options.mount_opt;
1058 osb->s_atime_quantum = parsed_options.atime_quantum;
1059 osb->preferred_slot = parsed_options.slot;
1060 osb->osb_commit_interval = parsed_options.commit_interval;
1061
1062 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1063 osb->osb_resv_level = parsed_options.resv_level;
1064 osb->osb_dir_resv_level = parsed_options.resv_level;
1065 if (parsed_options.dir_resv_level == -1)
1066 osb->osb_dir_resv_level = parsed_options.resv_level;
1067 else
1068 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1069
1070 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1071 if (status)
1072 goto read_super_error;
1073
1074 sb->s_magic = OCFS2_SUPER_MAGIC;
1075
1076 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1077 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1078
1079 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1080 * heartbeat=none */
1081 if (bdev_read_only(sb->s_bdev)) {
1082 if (!(sb->s_flags & MS_RDONLY)) {
1083 status = -EACCES;
1084 mlog(ML_ERROR, "Readonly device detected but readonly "
1085 "mount was not specified.\n");
1086 goto read_super_error;
1087 }
1088
1089 /* You should not be able to start a local heartbeat
1090 * on a readonly device. */
1091 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1092 status = -EROFS;
1093 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1094 "device.\n");
1095 goto read_super_error;
1096 }
1097
1098 status = ocfs2_check_journals_nolocks(osb);
1099 if (status < 0) {
1100 if (status == -EROFS)
1101 mlog(ML_ERROR, "Recovery required on readonly "
1102 "file system, but write access is "
1103 "unavailable.\n");
1104 else
1105 mlog_errno(status);
1106 goto read_super_error;
1107 }
1108
1109 ocfs2_set_ro_flag(osb, 1);
1110
1111 printk(KERN_NOTICE "Readonly device detected. No cluster "
1112 "services will be utilized for this mount. Recovery "
1113 "will be skipped.\n");
1114 }
1115
1116 if (!ocfs2_is_hard_readonly(osb)) {
1117 if (sb->s_flags & MS_RDONLY)
1118 ocfs2_set_ro_flag(osb, 0);
1119 }
1120
1121 status = ocfs2_verify_heartbeat(osb);
1122 if (status < 0) {
1123 mlog_errno(status);
1124 goto read_super_error;
1125 }
1126
1127 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1128 ocfs2_debugfs_root);
1129 if (!osb->osb_debug_root) {
1130 status = -EINVAL;
1131 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1132 goto read_super_error;
1133 }
1134
1135 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1136 osb->osb_debug_root,
1137 osb,
1138 &ocfs2_osb_debug_fops);
1139 if (!osb->osb_ctxt) {
1140 status = -EINVAL;
1141 mlog_errno(status);
1142 goto read_super_error;
1143 }
1144
1145 if (ocfs2_meta_ecc(osb)) {
1146 status = ocfs2_blockcheck_stats_debugfs_install(
1147 &osb->osb_ecc_stats,
1148 osb->osb_debug_root);
1149 if (status) {
1150 mlog(ML_ERROR,
1151 "Unable to create blockcheck statistics "
1152 "files\n");
1153 goto read_super_error;
1154 }
1155 }
1156
1157 status = ocfs2_mount_volume(sb);
1158 if (osb->root_inode)
1159 inode = igrab(osb->root_inode);
1160
1161 if (status < 0)
1162 goto read_super_error;
1163
1164 if (!inode) {
1165 status = -EIO;
1166 mlog_errno(status);
1167 goto read_super_error;
1168 }
1169
1170 root = d_alloc_root(inode);
1171 if (!root) {
1172 status = -ENOMEM;
1173 mlog_errno(status);
1174 goto read_super_error;
1175 }
1176
1177 sb->s_root = root;
1178
1179 ocfs2_complete_mount_recovery(osb);
1180
1181 if (ocfs2_mount_local(osb))
1182 snprintf(nodestr, sizeof(nodestr), "local");
1183 else
1184 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1185
1186 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1187 "with %s data mode.\n",
1188 osb->dev_str, nodestr, osb->slot_num,
1189 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1190 "ordered");
1191
1192 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1193 wake_up(&osb->osb_mount_event);
1194
1195 /* Now we can initialize quotas because we can afford to wait
1196 * for cluster locks recovery now. That also means that truncation
1197 * log recovery can happen but that waits for proper quota setup */
1198 if (!(sb->s_flags & MS_RDONLY)) {
1199 status = ocfs2_enable_quotas(osb);
1200 if (status < 0) {
1201 /* We have to err-out specially here because
1202 * s_root is already set */
1203 mlog_errno(status);
1204 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1205 wake_up(&osb->osb_mount_event);
1206 mlog_exit(status);
1207 return status;
1208 }
1209 }
1210
1211 ocfs2_complete_quota_recovery(osb);
1212
1213 /* Now we wake up again for processes waiting for quotas */
1214 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1215 wake_up(&osb->osb_mount_event);
1216
1217 /* Start this when the mount is almost sure of being successful */
1218 ocfs2_orphan_scan_start(osb);
1219
1220 mlog_exit(status);
1221 return status;
1222
1223 read_super_error:
1224 brelse(bh);
1225
1226 if (inode)
1227 iput(inode);
1228
1229 if (osb) {
1230 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1231 wake_up(&osb->osb_mount_event);
1232 ocfs2_dismount_volume(sb, 1);
1233 }
1234
1235 mlog_exit(status);
1236 return status;
1237 }
1238
1239 static int ocfs2_get_sb(struct file_system_type *fs_type,
1240 int flags,
1241 const char *dev_name,
1242 void *data,
1243 struct vfsmount *mnt)
1244 {
1245 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1246 mnt);
1247 }
1248
1249 static void ocfs2_kill_sb(struct super_block *sb)
1250 {
1251 struct ocfs2_super *osb = OCFS2_SB(sb);
1252
1253 /* Failed mount? */
1254 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1255 goto out;
1256
1257 /* Prevent further queueing of inode drop events */
1258 spin_lock(&dentry_list_lock);
1259 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1260 spin_unlock(&dentry_list_lock);
1261 /* Wait for work to finish and/or remove it */
1262 cancel_work_sync(&osb->dentry_lock_work);
1263 out:
1264 kill_block_super(sb);
1265 }
1266
1267 static struct file_system_type ocfs2_fs_type = {
1268 .owner = THIS_MODULE,
1269 .name = "ocfs2",
1270 .get_sb = ocfs2_get_sb, /* is this called when we mount
1271 * the fs? */
1272 .kill_sb = ocfs2_kill_sb,
1273
1274 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1275 .next = NULL
1276 };
1277
1278 static int ocfs2_check_set_options(struct super_block *sb,
1279 struct mount_options *options)
1280 {
1281 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1282 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1283 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1284 mlog(ML_ERROR, "User quotas were requested, but this "
1285 "filesystem does not have the feature enabled.\n");
1286 return 0;
1287 }
1288 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1289 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1290 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1291 mlog(ML_ERROR, "Group quotas were requested, but this "
1292 "filesystem does not have the feature enabled.\n");
1293 return 0;
1294 }
1295 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1296 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1297 mlog(ML_ERROR, "ACL support requested but extended attributes "
1298 "feature is not enabled\n");
1299 return 0;
1300 }
1301 /* No ACL setting specified? Use XATTR feature... */
1302 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1303 OCFS2_MOUNT_NO_POSIX_ACL))) {
1304 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1305 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1306 else
1307 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1308 }
1309 return 1;
1310 }
1311
1312 static int ocfs2_parse_options(struct super_block *sb,
1313 char *options,
1314 struct mount_options *mopt,
1315 int is_remount)
1316 {
1317 int status;
1318 char *p;
1319 u32 tmp;
1320
1321 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1322 options ? options : "(none)");
1323
1324 mopt->commit_interval = 0;
1325 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1326 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1327 mopt->slot = OCFS2_INVALID_SLOT;
1328 mopt->localalloc_opt = -1;
1329 mopt->cluster_stack[0] = '\0';
1330 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1331 mopt->dir_resv_level = -1;
1332
1333 if (!options) {
1334 status = 1;
1335 goto bail;
1336 }
1337
1338 while ((p = strsep(&options, ",")) != NULL) {
1339 int token, option;
1340 substring_t args[MAX_OPT_ARGS];
1341
1342 if (!*p)
1343 continue;
1344
1345 token = match_token(p, tokens, args);
1346 switch (token) {
1347 case Opt_hb_local:
1348 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1349 break;
1350 case Opt_hb_none:
1351 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1352 break;
1353 case Opt_hb_global:
1354 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1355 break;
1356 case Opt_barrier:
1357 if (match_int(&args[0], &option)) {
1358 status = 0;
1359 goto bail;
1360 }
1361 if (option)
1362 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1363 else
1364 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1365 break;
1366 case Opt_intr:
1367 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1368 break;
1369 case Opt_nointr:
1370 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1371 break;
1372 case Opt_err_panic:
1373 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1374 break;
1375 case Opt_err_ro:
1376 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1377 break;
1378 case Opt_data_ordered:
1379 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1380 break;
1381 case Opt_data_writeback:
1382 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1383 break;
1384 case Opt_user_xattr:
1385 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1386 break;
1387 case Opt_nouser_xattr:
1388 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1389 break;
1390 case Opt_atime_quantum:
1391 if (match_int(&args[0], &option)) {
1392 status = 0;
1393 goto bail;
1394 }
1395 if (option >= 0)
1396 mopt->atime_quantum = option;
1397 break;
1398 case Opt_slot:
1399 option = 0;
1400 if (match_int(&args[0], &option)) {
1401 status = 0;
1402 goto bail;
1403 }
1404 if (option)
1405 mopt->slot = (s16)option;
1406 break;
1407 case Opt_commit:
1408 option = 0;
1409 if (match_int(&args[0], &option)) {
1410 status = 0;
1411 goto bail;
1412 }
1413 if (option < 0)
1414 return 0;
1415 if (option == 0)
1416 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1417 mopt->commit_interval = HZ * option;
1418 break;
1419 case Opt_localalloc:
1420 option = 0;
1421 if (match_int(&args[0], &option)) {
1422 status = 0;
1423 goto bail;
1424 }
1425 if (option >= 0)
1426 mopt->localalloc_opt = option;
1427 break;
1428 case Opt_localflocks:
1429 /*
1430 * Changing this during remount could race
1431 * flock() requests, or "unbalance" existing
1432 * ones (e.g., a lock is taken in one mode but
1433 * dropped in the other). If users care enough
1434 * to flip locking modes during remount, we
1435 * could add a "local" flag to individual
1436 * flock structures for proper tracking of
1437 * state.
1438 */
1439 if (!is_remount)
1440 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1441 break;
1442 case Opt_stack:
1443 /* Check both that the option we were passed
1444 * is of the right length and that it is a proper
1445 * string of the right length.
1446 */
1447 if (((args[0].to - args[0].from) !=
1448 OCFS2_STACK_LABEL_LEN) ||
1449 (strnlen(args[0].from,
1450 OCFS2_STACK_LABEL_LEN) !=
1451 OCFS2_STACK_LABEL_LEN)) {
1452 mlog(ML_ERROR,
1453 "Invalid cluster_stack option\n");
1454 status = 0;
1455 goto bail;
1456 }
1457 memcpy(mopt->cluster_stack, args[0].from,
1458 OCFS2_STACK_LABEL_LEN);
1459 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1460 break;
1461 case Opt_inode64:
1462 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1463 break;
1464 case Opt_usrquota:
1465 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1466 break;
1467 case Opt_grpquota:
1468 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1469 break;
1470 case Opt_coherency_buffered:
1471 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1472 break;
1473 case Opt_coherency_full:
1474 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1475 break;
1476 case Opt_acl:
1477 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1478 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1479 break;
1480 case Opt_noacl:
1481 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1482 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1483 break;
1484 case Opt_resv_level:
1485 if (is_remount)
1486 break;
1487 if (match_int(&args[0], &option)) {
1488 status = 0;
1489 goto bail;
1490 }
1491 if (option >= OCFS2_MIN_RESV_LEVEL &&
1492 option < OCFS2_MAX_RESV_LEVEL)
1493 mopt->resv_level = option;
1494 break;
1495 case Opt_dir_resv_level:
1496 if (is_remount)
1497 break;
1498 if (match_int(&args[0], &option)) {
1499 status = 0;
1500 goto bail;
1501 }
1502 if (option >= OCFS2_MIN_RESV_LEVEL &&
1503 option < OCFS2_MAX_RESV_LEVEL)
1504 mopt->dir_resv_level = option;
1505 break;
1506 default:
1507 mlog(ML_ERROR,
1508 "Unrecognized mount option \"%s\" "
1509 "or missing value\n", p);
1510 status = 0;
1511 goto bail;
1512 }
1513 }
1514
1515 /* Ensure only one heartbeat mode */
1516 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
1517 OCFS2_MOUNT_HB_NONE);
1518 if (hweight32(tmp) != 1) {
1519 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1520 status = 0;
1521 goto bail;
1522 }
1523
1524 status = 1;
1525
1526 bail:
1527 mlog_exit(status);
1528 return status;
1529 }
1530
1531 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1532 {
1533 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1534 unsigned long opts = osb->s_mount_opt;
1535 unsigned int local_alloc_megs;
1536
1537 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1538 seq_printf(s, ",_netdev");
1539 if (opts & OCFS2_MOUNT_HB_LOCAL)
1540 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1541 else
1542 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1543 } else
1544 seq_printf(s, ",%s", OCFS2_HB_NONE);
1545
1546 if (opts & OCFS2_MOUNT_NOINTR)
1547 seq_printf(s, ",nointr");
1548
1549 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1550 seq_printf(s, ",data=writeback");
1551 else
1552 seq_printf(s, ",data=ordered");
1553
1554 if (opts & OCFS2_MOUNT_BARRIER)
1555 seq_printf(s, ",barrier=1");
1556
1557 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1558 seq_printf(s, ",errors=panic");
1559 else
1560 seq_printf(s, ",errors=remount-ro");
1561
1562 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1563 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1564
1565 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1566 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1567
1568 if (osb->osb_commit_interval)
1569 seq_printf(s, ",commit=%u",
1570 (unsigned) (osb->osb_commit_interval / HZ));
1571
1572 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1573 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1574 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1575
1576 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1577 seq_printf(s, ",localflocks,");
1578
1579 if (osb->osb_cluster_stack[0])
1580 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1581 osb->osb_cluster_stack);
1582 if (opts & OCFS2_MOUNT_USRQUOTA)
1583 seq_printf(s, ",usrquota");
1584 if (opts & OCFS2_MOUNT_GRPQUOTA)
1585 seq_printf(s, ",grpquota");
1586
1587 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1588 seq_printf(s, ",coherency=buffered");
1589 else
1590 seq_printf(s, ",coherency=full");
1591
1592 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1593 seq_printf(s, ",nouser_xattr");
1594 else
1595 seq_printf(s, ",user_xattr");
1596
1597 if (opts & OCFS2_MOUNT_INODE64)
1598 seq_printf(s, ",inode64");
1599
1600 if (opts & OCFS2_MOUNT_POSIX_ACL)
1601 seq_printf(s, ",acl");
1602 else
1603 seq_printf(s, ",noacl");
1604
1605 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1606 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1607
1608 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1609 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1610
1611 return 0;
1612 }
1613
1614 static int __init ocfs2_init(void)
1615 {
1616 int status;
1617
1618 mlog_entry_void();
1619
1620 ocfs2_print_version();
1621
1622 status = init_ocfs2_uptodate_cache();
1623 if (status < 0) {
1624 mlog_errno(status);
1625 goto leave;
1626 }
1627
1628 status = ocfs2_initialize_mem_caches();
1629 if (status < 0) {
1630 mlog_errno(status);
1631 goto leave;
1632 }
1633
1634 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1635 if (!ocfs2_wq) {
1636 status = -ENOMEM;
1637 goto leave;
1638 }
1639
1640 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1641 if (!ocfs2_debugfs_root) {
1642 status = -EFAULT;
1643 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1644 }
1645
1646 status = ocfs2_quota_setup();
1647 if (status)
1648 goto leave;
1649
1650 ocfs2_set_locking_protocol();
1651
1652 status = register_quota_format(&ocfs2_quota_format);
1653 leave:
1654 if (status < 0) {
1655 ocfs2_quota_shutdown();
1656 ocfs2_free_mem_caches();
1657 exit_ocfs2_uptodate_cache();
1658 }
1659
1660 mlog_exit(status);
1661
1662 if (status >= 0) {
1663 return register_filesystem(&ocfs2_fs_type);
1664 } else
1665 return -1;
1666 }
1667
1668 static void __exit ocfs2_exit(void)
1669 {
1670 mlog_entry_void();
1671
1672 ocfs2_quota_shutdown();
1673
1674 if (ocfs2_wq) {
1675 flush_workqueue(ocfs2_wq);
1676 destroy_workqueue(ocfs2_wq);
1677 }
1678
1679 unregister_quota_format(&ocfs2_quota_format);
1680
1681 debugfs_remove(ocfs2_debugfs_root);
1682
1683 ocfs2_free_mem_caches();
1684
1685 unregister_filesystem(&ocfs2_fs_type);
1686
1687 exit_ocfs2_uptodate_cache();
1688
1689 mlog_exit_void();
1690 }
1691
1692 static void ocfs2_put_super(struct super_block *sb)
1693 {
1694 mlog_entry("(0x%p)\n", sb);
1695
1696 ocfs2_sync_blockdev(sb);
1697 ocfs2_dismount_volume(sb, 0);
1698
1699 mlog_exit_void();
1700 }
1701
1702 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1703 {
1704 struct ocfs2_super *osb;
1705 u32 numbits, freebits;
1706 int status;
1707 struct ocfs2_dinode *bm_lock;
1708 struct buffer_head *bh = NULL;
1709 struct inode *inode = NULL;
1710
1711 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1712
1713 osb = OCFS2_SB(dentry->d_sb);
1714
1715 inode = ocfs2_get_system_file_inode(osb,
1716 GLOBAL_BITMAP_SYSTEM_INODE,
1717 OCFS2_INVALID_SLOT);
1718 if (!inode) {
1719 mlog(ML_ERROR, "failed to get bitmap inode\n");
1720 status = -EIO;
1721 goto bail;
1722 }
1723
1724 status = ocfs2_inode_lock(inode, &bh, 0);
1725 if (status < 0) {
1726 mlog_errno(status);
1727 goto bail;
1728 }
1729
1730 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1731
1732 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1733 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1734
1735 buf->f_type = OCFS2_SUPER_MAGIC;
1736 buf->f_bsize = dentry->d_sb->s_blocksize;
1737 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1738 buf->f_blocks = ((sector_t) numbits) *
1739 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1740 buf->f_bfree = ((sector_t) freebits) *
1741 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1742 buf->f_bavail = buf->f_bfree;
1743 buf->f_files = numbits;
1744 buf->f_ffree = freebits;
1745 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1746 & 0xFFFFFFFFUL;
1747 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1748 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1749
1750 brelse(bh);
1751
1752 ocfs2_inode_unlock(inode, 0);
1753 status = 0;
1754 bail:
1755 if (inode)
1756 iput(inode);
1757
1758 mlog_exit(status);
1759
1760 return status;
1761 }
1762
1763 static void ocfs2_inode_init_once(void *data)
1764 {
1765 struct ocfs2_inode_info *oi = data;
1766
1767 oi->ip_flags = 0;
1768 oi->ip_open_count = 0;
1769 spin_lock_init(&oi->ip_lock);
1770 ocfs2_extent_map_init(&oi->vfs_inode);
1771 INIT_LIST_HEAD(&oi->ip_io_markers);
1772 oi->ip_dir_start_lookup = 0;
1773
1774 init_rwsem(&oi->ip_alloc_sem);
1775 init_rwsem(&oi->ip_xattr_sem);
1776 mutex_init(&oi->ip_io_mutex);
1777
1778 oi->ip_blkno = 0ULL;
1779 oi->ip_clusters = 0;
1780
1781 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1782
1783 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1784 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1785 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1786
1787 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1788 &ocfs2_inode_caching_ops);
1789
1790 inode_init_once(&oi->vfs_inode);
1791 }
1792
1793 static int ocfs2_initialize_mem_caches(void)
1794 {
1795 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1796 sizeof(struct ocfs2_inode_info),
1797 0,
1798 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1799 SLAB_MEM_SPREAD),
1800 ocfs2_inode_init_once);
1801 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1802 sizeof(struct ocfs2_dquot),
1803 0,
1804 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1805 SLAB_MEM_SPREAD),
1806 NULL);
1807 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1808 sizeof(struct ocfs2_quota_chunk),
1809 0,
1810 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1811 NULL);
1812 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1813 !ocfs2_qf_chunk_cachep) {
1814 if (ocfs2_inode_cachep)
1815 kmem_cache_destroy(ocfs2_inode_cachep);
1816 if (ocfs2_dquot_cachep)
1817 kmem_cache_destroy(ocfs2_dquot_cachep);
1818 if (ocfs2_qf_chunk_cachep)
1819 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1820 return -ENOMEM;
1821 }
1822
1823 return 0;
1824 }
1825
1826 static void ocfs2_free_mem_caches(void)
1827 {
1828 if (ocfs2_inode_cachep)
1829 kmem_cache_destroy(ocfs2_inode_cachep);
1830 ocfs2_inode_cachep = NULL;
1831
1832 if (ocfs2_dquot_cachep)
1833 kmem_cache_destroy(ocfs2_dquot_cachep);
1834 ocfs2_dquot_cachep = NULL;
1835
1836 if (ocfs2_qf_chunk_cachep)
1837 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1838 ocfs2_qf_chunk_cachep = NULL;
1839 }
1840
1841 static int ocfs2_get_sector(struct super_block *sb,
1842 struct buffer_head **bh,
1843 int block,
1844 int sect_size)
1845 {
1846 if (!sb_set_blocksize(sb, sect_size)) {
1847 mlog(ML_ERROR, "unable to set blocksize\n");
1848 return -EIO;
1849 }
1850
1851 *bh = sb_getblk(sb, block);
1852 if (!*bh) {
1853 mlog_errno(-EIO);
1854 return -EIO;
1855 }
1856 lock_buffer(*bh);
1857 if (!buffer_dirty(*bh))
1858 clear_buffer_uptodate(*bh);
1859 unlock_buffer(*bh);
1860 ll_rw_block(READ, 1, bh);
1861 wait_on_buffer(*bh);
1862 if (!buffer_uptodate(*bh)) {
1863 mlog_errno(-EIO);
1864 brelse(*bh);
1865 *bh = NULL;
1866 return -EIO;
1867 }
1868
1869 return 0;
1870 }
1871
1872 static int ocfs2_mount_volume(struct super_block *sb)
1873 {
1874 int status = 0;
1875 int unlock_super = 0;
1876 struct ocfs2_super *osb = OCFS2_SB(sb);
1877
1878 mlog_entry_void();
1879
1880 if (ocfs2_is_hard_readonly(osb))
1881 goto leave;
1882
1883 status = ocfs2_dlm_init(osb);
1884 if (status < 0) {
1885 mlog_errno(status);
1886 goto leave;
1887 }
1888
1889 status = ocfs2_super_lock(osb, 1);
1890 if (status < 0) {
1891 mlog_errno(status);
1892 goto leave;
1893 }
1894 unlock_super = 1;
1895
1896 /* This will load up the node map and add ourselves to it. */
1897 status = ocfs2_find_slot(osb);
1898 if (status < 0) {
1899 mlog_errno(status);
1900 goto leave;
1901 }
1902
1903 /* load all node-local system inodes */
1904 status = ocfs2_init_local_system_inodes(osb);
1905 if (status < 0) {
1906 mlog_errno(status);
1907 goto leave;
1908 }
1909
1910 status = ocfs2_check_volume(osb);
1911 if (status < 0) {
1912 mlog_errno(status);
1913 goto leave;
1914 }
1915
1916 status = ocfs2_truncate_log_init(osb);
1917 if (status < 0)
1918 mlog_errno(status);
1919
1920 leave:
1921 if (unlock_super)
1922 ocfs2_super_unlock(osb, 1);
1923
1924 mlog_exit(status);
1925 return status;
1926 }
1927
1928 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1929 {
1930 int tmp, hangup_needed = 0;
1931 struct ocfs2_super *osb = NULL;
1932 char nodestr[8];
1933
1934 mlog_entry("(0x%p)\n", sb);
1935
1936 BUG_ON(!sb);
1937 osb = OCFS2_SB(sb);
1938 BUG_ON(!osb);
1939
1940 debugfs_remove(osb->osb_ctxt);
1941
1942 /*
1943 * Flush inode dropping work queue so that deletes are
1944 * performed while the filesystem is still working
1945 */
1946 ocfs2_drop_all_dl_inodes(osb);
1947
1948 /* Orphan scan should be stopped as early as possible */
1949 ocfs2_orphan_scan_stop(osb);
1950
1951 ocfs2_disable_quotas(osb);
1952
1953 ocfs2_shutdown_local_alloc(osb);
1954
1955 ocfs2_truncate_log_shutdown(osb);
1956
1957 /* This will disable recovery and flush any recovery work. */
1958 ocfs2_recovery_exit(osb);
1959
1960 ocfs2_journal_shutdown(osb);
1961
1962 ocfs2_sync_blockdev(sb);
1963
1964 ocfs2_purge_refcount_trees(osb);
1965
1966 /* No cluster connection means we've failed during mount, so skip
1967 * all the steps which depended on that to complete. */
1968 if (osb->cconn) {
1969 tmp = ocfs2_super_lock(osb, 1);
1970 if (tmp < 0) {
1971 mlog_errno(tmp);
1972 return;
1973 }
1974 }
1975
1976 if (osb->slot_num != OCFS2_INVALID_SLOT)
1977 ocfs2_put_slot(osb);
1978
1979 if (osb->cconn)
1980 ocfs2_super_unlock(osb, 1);
1981
1982 ocfs2_release_system_inodes(osb);
1983
1984 /*
1985 * If we're dismounting due to mount error, mount.ocfs2 will clean
1986 * up heartbeat. If we're a local mount, there is no heartbeat.
1987 * If we failed before we got a uuid_str yet, we can't stop
1988 * heartbeat. Otherwise, do it.
1989 */
1990 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1991 hangup_needed = 1;
1992
1993 if (osb->cconn)
1994 ocfs2_dlm_shutdown(osb, hangup_needed);
1995
1996 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1997 debugfs_remove(osb->osb_debug_root);
1998
1999 if (hangup_needed)
2000 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
2001
2002 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
2003
2004 if (ocfs2_mount_local(osb))
2005 snprintf(nodestr, sizeof(nodestr), "local");
2006 else
2007 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2008
2009 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2010 osb->dev_str, nodestr);
2011
2012 ocfs2_delete_osb(osb);
2013 kfree(osb);
2014 sb->s_dev = 0;
2015 sb->s_fs_info = NULL;
2016 }
2017
2018 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2019 unsigned uuid_bytes)
2020 {
2021 int i, ret;
2022 char *ptr;
2023
2024 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2025
2026 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2027 if (osb->uuid_str == NULL)
2028 return -ENOMEM;
2029
2030 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2031 /* print with null */
2032 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2033 if (ret != 2) /* drop super cleans up */
2034 return -EINVAL;
2035 /* then only advance past the last char */
2036 ptr += 2;
2037 }
2038
2039 return 0;
2040 }
2041
2042 /* Make sure entire volume is addressable by our journal. Requires
2043 osb_clusters_at_boot to be valid and for the journal to have been
2044 initialized by ocfs2_journal_init(). */
2045 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2046 {
2047 int status = 0;
2048 u64 max_block =
2049 ocfs2_clusters_to_blocks(osb->sb,
2050 osb->osb_clusters_at_boot) - 1;
2051
2052 /* 32-bit block number is always OK. */
2053 if (max_block <= (u32)~0ULL)
2054 goto out;
2055
2056 /* Volume is "huge", so see if our journal is new enough to
2057 support it. */
2058 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2059 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2060 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2061 JBD2_FEATURE_INCOMPAT_64BIT))) {
2062 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2063 "Enable the 'block64' journal option with tunefs.ocfs2");
2064 status = -EFBIG;
2065 goto out;
2066 }
2067
2068 out:
2069 return status;
2070 }
2071
2072 static int ocfs2_initialize_super(struct super_block *sb,
2073 struct buffer_head *bh,
2074 int sector_size,
2075 struct ocfs2_blockcheck_stats *stats)
2076 {
2077 int status;
2078 int i, cbits, bbits;
2079 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2080 struct inode *inode = NULL;
2081 struct ocfs2_journal *journal;
2082 __le32 uuid_net_key;
2083 struct ocfs2_super *osb;
2084 u64 total_blocks;
2085
2086 mlog_entry_void();
2087
2088 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2089 if (!osb) {
2090 status = -ENOMEM;
2091 mlog_errno(status);
2092 goto bail;
2093 }
2094
2095 sb->s_fs_info = osb;
2096 sb->s_op = &ocfs2_sops;
2097 sb->s_export_op = &ocfs2_export_ops;
2098 sb->s_qcop = &ocfs2_quotactl_ops;
2099 sb->dq_op = &ocfs2_quota_operations;
2100 sb->s_xattr = ocfs2_xattr_handlers;
2101 sb->s_time_gran = 1;
2102 sb->s_flags |= MS_NOATIME;
2103 /* this is needed to support O_LARGEFILE */
2104 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2105 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2106 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2107
2108 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2109
2110 for (i = 0; i < 3; i++)
2111 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2112 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2113
2114 osb->sb = sb;
2115 /* Save off for ocfs2_rw_direct */
2116 osb->s_sectsize_bits = blksize_bits(sector_size);
2117 BUG_ON(!osb->s_sectsize_bits);
2118
2119 spin_lock_init(&osb->dc_task_lock);
2120 init_waitqueue_head(&osb->dc_event);
2121 osb->dc_work_sequence = 0;
2122 osb->dc_wake_sequence = 0;
2123 INIT_LIST_HEAD(&osb->blocked_lock_list);
2124 osb->blocked_lock_count = 0;
2125 spin_lock_init(&osb->osb_lock);
2126 spin_lock_init(&osb->osb_xattr_lock);
2127 ocfs2_init_steal_slots(osb);
2128
2129 atomic_set(&osb->alloc_stats.moves, 0);
2130 atomic_set(&osb->alloc_stats.local_data, 0);
2131 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2132 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2133 atomic_set(&osb->alloc_stats.bg_extends, 0);
2134
2135 /* Copy the blockcheck stats from the superblock probe */
2136 osb->osb_ecc_stats = *stats;
2137
2138 ocfs2_init_node_maps(osb);
2139
2140 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2141 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2142
2143 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2144 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2145 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2146 osb->max_slots);
2147 status = -EINVAL;
2148 goto bail;
2149 }
2150 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2151
2152 ocfs2_orphan_scan_init(osb);
2153
2154 status = ocfs2_recovery_init(osb);
2155 if (status) {
2156 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2157 mlog_errno(status);
2158 goto bail;
2159 }
2160
2161 init_waitqueue_head(&osb->checkpoint_event);
2162 atomic_set(&osb->needs_checkpoint, 0);
2163
2164 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2165
2166 osb->slot_num = OCFS2_INVALID_SLOT;
2167
2168 osb->s_xattr_inline_size = le16_to_cpu(
2169 di->id2.i_super.s_xattr_inline_size);
2170
2171 osb->local_alloc_state = OCFS2_LA_UNUSED;
2172 osb->local_alloc_bh = NULL;
2173 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2174
2175 init_waitqueue_head(&osb->osb_mount_event);
2176
2177 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2178 if (status) {
2179 mlog_errno(status);
2180 goto bail;
2181 }
2182
2183 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2184 if (!osb->vol_label) {
2185 mlog(ML_ERROR, "unable to alloc vol label\n");
2186 status = -ENOMEM;
2187 goto bail;
2188 }
2189
2190 osb->slot_recovery_generations =
2191 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2192 GFP_KERNEL);
2193 if (!osb->slot_recovery_generations) {
2194 status = -ENOMEM;
2195 mlog_errno(status);
2196 goto bail;
2197 }
2198
2199 init_waitqueue_head(&osb->osb_wipe_event);
2200 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2201 sizeof(*osb->osb_orphan_wipes),
2202 GFP_KERNEL);
2203 if (!osb->osb_orphan_wipes) {
2204 status = -ENOMEM;
2205 mlog_errno(status);
2206 goto bail;
2207 }
2208
2209 osb->osb_rf_lock_tree = RB_ROOT;
2210
2211 osb->s_feature_compat =
2212 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2213 osb->s_feature_ro_compat =
2214 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2215 osb->s_feature_incompat =
2216 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2217
2218 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2219 mlog(ML_ERROR, "couldn't mount because of unsupported "
2220 "optional features (%x).\n", i);
2221 status = -EINVAL;
2222 goto bail;
2223 }
2224 if (!(osb->sb->s_flags & MS_RDONLY) &&
2225 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2226 mlog(ML_ERROR, "couldn't mount RDWR because of "
2227 "unsupported optional features (%x).\n", i);
2228 status = -EINVAL;
2229 goto bail;
2230 }
2231
2232 if (ocfs2_clusterinfo_valid(osb)) {
2233 osb->osb_stackflags =
2234 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2235 memcpy(osb->osb_cluster_stack,
2236 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2237 OCFS2_STACK_LABEL_LEN);
2238 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2239 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2240 mlog(ML_ERROR,
2241 "couldn't mount because of an invalid "
2242 "cluster stack label (%s) \n",
2243 osb->osb_cluster_stack);
2244 status = -EINVAL;
2245 goto bail;
2246 }
2247 } else {
2248 /* The empty string is identical with classic tools that
2249 * don't know about s_cluster_info. */
2250 osb->osb_cluster_stack[0] = '\0';
2251 }
2252
2253 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2254
2255 /* FIXME
2256 * This should be done in ocfs2_journal_init(), but unknown
2257 * ordering issues will cause the filesystem to crash.
2258 * If anyone wants to figure out what part of the code
2259 * refers to osb->journal before ocfs2_journal_init() is run,
2260 * be my guest.
2261 */
2262 /* initialize our journal structure */
2263
2264 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2265 if (!journal) {
2266 mlog(ML_ERROR, "unable to alloc journal\n");
2267 status = -ENOMEM;
2268 goto bail;
2269 }
2270 osb->journal = journal;
2271 journal->j_osb = osb;
2272
2273 atomic_set(&journal->j_num_trans, 0);
2274 init_rwsem(&journal->j_trans_barrier);
2275 init_waitqueue_head(&journal->j_checkpointed);
2276 spin_lock_init(&journal->j_lock);
2277 journal->j_trans_id = (unsigned long) 1;
2278 INIT_LIST_HEAD(&journal->j_la_cleanups);
2279 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2280 journal->j_state = OCFS2_JOURNAL_FREE;
2281
2282 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2283 osb->dentry_lock_list = NULL;
2284
2285 /* get some pseudo constants for clustersize bits */
2286 osb->s_clustersize_bits =
2287 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2288 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2289 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2290
2291 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2292 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2293 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2294 osb->s_clustersize);
2295 status = -EINVAL;
2296 goto bail;
2297 }
2298
2299 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2300 le32_to_cpu(di->i_clusters));
2301
2302 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2303 total_blocks);
2304 if (status) {
2305 mlog(ML_ERROR, "Volume too large "
2306 "to mount safely on this system");
2307 status = -EFBIG;
2308 goto bail;
2309 }
2310
2311 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2312 sizeof(di->id2.i_super.s_uuid))) {
2313 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2314 status = -ENOMEM;
2315 goto bail;
2316 }
2317
2318 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2319
2320 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2321 osb->vol_label[63] = '\0';
2322 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2323 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2324 osb->first_cluster_group_blkno =
2325 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2326 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2327 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2328 mlog(0, "vol_label: %s\n", osb->vol_label);
2329 mlog(0, "uuid: %s\n", osb->uuid_str);
2330 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2331 (unsigned long long)osb->root_blkno,
2332 (unsigned long long)osb->system_dir_blkno);
2333
2334 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2335 if (!osb->osb_dlm_debug) {
2336 status = -ENOMEM;
2337 mlog_errno(status);
2338 goto bail;
2339 }
2340
2341 atomic_set(&osb->vol_state, VOLUME_INIT);
2342
2343 /* load root, system_dir, and all global system inodes */
2344 status = ocfs2_init_global_system_inodes(osb);
2345 if (status < 0) {
2346 mlog_errno(status);
2347 goto bail;
2348 }
2349
2350 /*
2351 * global bitmap
2352 */
2353 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2354 OCFS2_INVALID_SLOT);
2355 if (!inode) {
2356 status = -EINVAL;
2357 mlog_errno(status);
2358 goto bail;
2359 }
2360
2361 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2362 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2363 iput(inode);
2364
2365 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2366 osb->s_feature_incompat) * 8;
2367
2368 status = ocfs2_init_slot_info(osb);
2369 if (status < 0) {
2370 mlog_errno(status);
2371 goto bail;
2372 }
2373
2374 bail:
2375 mlog_exit(status);
2376 return status;
2377 }
2378
2379 /*
2380 * will return: -EAGAIN if it is ok to keep searching for superblocks
2381 * -EINVAL if there is a bad superblock
2382 * 0 on success
2383 */
2384 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2385 struct buffer_head *bh,
2386 u32 blksz,
2387 struct ocfs2_blockcheck_stats *stats)
2388 {
2389 int status = -EAGAIN;
2390
2391 mlog_entry_void();
2392
2393 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2394 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2395 /* We have to do a raw check of the feature here */
2396 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2397 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2398 status = ocfs2_block_check_validate(bh->b_data,
2399 bh->b_size,
2400 &di->i_check,
2401 stats);
2402 if (status)
2403 goto out;
2404 }
2405 status = -EINVAL;
2406 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2407 mlog(ML_ERROR, "found superblock with incorrect block "
2408 "size: found %u, should be %u\n",
2409 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2410 blksz);
2411 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2412 OCFS2_MAJOR_REV_LEVEL ||
2413 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2414 OCFS2_MINOR_REV_LEVEL) {
2415 mlog(ML_ERROR, "found superblock with bad version: "
2416 "found %u.%u, should be %u.%u\n",
2417 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2418 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2419 OCFS2_MAJOR_REV_LEVEL,
2420 OCFS2_MINOR_REV_LEVEL);
2421 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2422 mlog(ML_ERROR, "bad block number on superblock: "
2423 "found %llu, should be %llu\n",
2424 (unsigned long long)le64_to_cpu(di->i_blkno),
2425 (unsigned long long)bh->b_blocknr);
2426 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2427 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2428 mlog(ML_ERROR, "bad cluster size found: %u\n",
2429 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2430 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2431 mlog(ML_ERROR, "bad root_blkno: 0\n");
2432 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2433 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2434 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2435 mlog(ML_ERROR,
2436 "Superblock slots found greater than file system "
2437 "maximum: found %u, max %u\n",
2438 le16_to_cpu(di->id2.i_super.s_max_slots),
2439 OCFS2_MAX_SLOTS);
2440 } else {
2441 /* found it! */
2442 status = 0;
2443 }
2444 }
2445
2446 out:
2447 mlog_exit(status);
2448 return status;
2449 }
2450
2451 static int ocfs2_check_volume(struct ocfs2_super *osb)
2452 {
2453 int status;
2454 int dirty;
2455 int local;
2456 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2457 * recover
2458 * ourselves. */
2459
2460 mlog_entry_void();
2461
2462 /* Init our journal object. */
2463 status = ocfs2_journal_init(osb->journal, &dirty);
2464 if (status < 0) {
2465 mlog(ML_ERROR, "Could not initialize journal!\n");
2466 goto finally;
2467 }
2468
2469 /* Now that journal has been initialized, check to make sure
2470 entire volume is addressable. */
2471 status = ocfs2_journal_addressable(osb);
2472 if (status)
2473 goto finally;
2474
2475 /* If the journal was unmounted cleanly then we don't want to
2476 * recover anything. Otherwise, journal_load will do that
2477 * dirty work for us :) */
2478 if (!dirty) {
2479 status = ocfs2_journal_wipe(osb->journal, 0);
2480 if (status < 0) {
2481 mlog_errno(status);
2482 goto finally;
2483 }
2484 } else {
2485 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2486 "recovering volume.\n");
2487 }
2488
2489 local = ocfs2_mount_local(osb);
2490
2491 /* will play back anything left in the journal. */
2492 status = ocfs2_journal_load(osb->journal, local, dirty);
2493 if (status < 0) {
2494 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2495 goto finally;
2496 }
2497
2498 if (dirty) {
2499 /* recover my local alloc if we didn't unmount cleanly. */
2500 status = ocfs2_begin_local_alloc_recovery(osb,
2501 osb->slot_num,
2502 &local_alloc);
2503 if (status < 0) {
2504 mlog_errno(status);
2505 goto finally;
2506 }
2507 /* we complete the recovery process after we've marked
2508 * ourselves as mounted. */
2509 }
2510
2511 mlog(0, "Journal loaded.\n");
2512
2513 status = ocfs2_load_local_alloc(osb);
2514 if (status < 0) {
2515 mlog_errno(status);
2516 goto finally;
2517 }
2518
2519 if (dirty) {
2520 /* Recovery will be completed after we've mounted the
2521 * rest of the volume. */
2522 osb->dirty = 1;
2523 osb->local_alloc_copy = local_alloc;
2524 local_alloc = NULL;
2525 }
2526
2527 /* go through each journal, trylock it and if you get the
2528 * lock, and it's marked as dirty, set the bit in the recover
2529 * map and launch a recovery thread for it. */
2530 status = ocfs2_mark_dead_nodes(osb);
2531 if (status < 0) {
2532 mlog_errno(status);
2533 goto finally;
2534 }
2535
2536 status = ocfs2_compute_replay_slots(osb);
2537 if (status < 0)
2538 mlog_errno(status);
2539
2540 finally:
2541 if (local_alloc)
2542 kfree(local_alloc);
2543
2544 mlog_exit(status);
2545 return status;
2546 }
2547
2548 /*
2549 * The routine gets called from dismount or close whenever a dismount on
2550 * volume is requested and the osb open count becomes 1.
2551 * It will remove the osb from the global list and also free up all the
2552 * initialized resources and fileobject.
2553 */
2554 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2555 {
2556 mlog_entry_void();
2557
2558 /* This function assumes that the caller has the main osb resource */
2559
2560 ocfs2_free_slot_info(osb);
2561
2562 kfree(osb->osb_orphan_wipes);
2563 kfree(osb->slot_recovery_generations);
2564 /* FIXME
2565 * This belongs in journal shutdown, but because we have to
2566 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2567 * we free it here.
2568 */
2569 kfree(osb->journal);
2570 if (osb->local_alloc_copy)
2571 kfree(osb->local_alloc_copy);
2572 kfree(osb->uuid_str);
2573 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2574 memset(osb, 0, sizeof(struct ocfs2_super));
2575
2576 mlog_exit_void();
2577 }
2578
2579 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2580 * panic(). We do not support continue-on-error operation. */
2581 static void ocfs2_handle_error(struct super_block *sb)
2582 {
2583 struct ocfs2_super *osb = OCFS2_SB(sb);
2584
2585 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2586 panic("OCFS2: (device %s): panic forced after error\n",
2587 sb->s_id);
2588
2589 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2590
2591 if (sb->s_flags & MS_RDONLY &&
2592 (ocfs2_is_soft_readonly(osb) ||
2593 ocfs2_is_hard_readonly(osb)))
2594 return;
2595
2596 printk(KERN_CRIT "File system is now read-only due to the potential "
2597 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2598 "system is unmounted.\n");
2599 sb->s_flags |= MS_RDONLY;
2600 ocfs2_set_ro_flag(osb, 0);
2601 }
2602
2603 static char error_buf[1024];
2604
2605 void __ocfs2_error(struct super_block *sb,
2606 const char *function,
2607 const char *fmt, ...)
2608 {
2609 va_list args;
2610
2611 va_start(args, fmt);
2612 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2613 va_end(args);
2614
2615 /* Not using mlog here because we want to show the actual
2616 * function the error came from. */
2617 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2618 sb->s_id, function, error_buf);
2619
2620 ocfs2_handle_error(sb);
2621 }
2622
2623 /* Handle critical errors. This is intentionally more drastic than
2624 * ocfs2_handle_error, so we only use for things like journal errors,
2625 * etc. */
2626 void __ocfs2_abort(struct super_block* sb,
2627 const char *function,
2628 const char *fmt, ...)
2629 {
2630 va_list args;
2631
2632 va_start(args, fmt);
2633 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2634 va_end(args);
2635
2636 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2637 sb->s_id, function, error_buf);
2638
2639 /* We don't have the cluster support yet to go straight to
2640 * hard readonly in here. Until then, we want to keep
2641 * ocfs2_abort() so that we can at least mark critical
2642 * errors.
2643 *
2644 * TODO: This should abort the journal and alert other nodes
2645 * that our slot needs recovery. */
2646
2647 /* Force a panic(). This stinks, but it's better than letting
2648 * things continue without having a proper hard readonly
2649 * here. */
2650 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2651 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2652 ocfs2_handle_error(sb);
2653 }
2654
2655 /*
2656 * Void signal blockers, because in-kernel sigprocmask() only fails
2657 * when SIG_* is wrong.
2658 */
2659 void ocfs2_block_signals(sigset_t *oldset)
2660 {
2661 int rc;
2662 sigset_t blocked;
2663
2664 sigfillset(&blocked);
2665 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2666 BUG_ON(rc);
2667 }
2668
2669 void ocfs2_unblock_signals(sigset_t *oldset)
2670 {
2671 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2672 BUG_ON(rc);
2673 }
2674
2675 module_init(ocfs2_init);
2676 module_exit(ocfs2_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree