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jffs2: use cond_resched() instead of yield()
[linux-2.6/cjktty.git] / fs / ocfs2 / super.c
blobfa1be1b304d10b7bf30c4ecb2c7a3fd9b3ecd8ca
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_data_ordered,
166 Opt_data_writeback,
167 Opt_atime_quantum,
168 Opt_slot,
169 Opt_commit,
170 Opt_localalloc,
171 Opt_localflocks,
172 Opt_stack,
173 Opt_user_xattr,
174 Opt_nouser_xattr,
175 Opt_inode64,
176 Opt_acl,
177 Opt_noacl,
178 Opt_usrquota,
179 Opt_grpquota,
180 Opt_resv_level,
181 Opt_dir_resv_level,
182 Opt_err,
183 };
184
185 static const match_table_t tokens = {
186 {Opt_barrier, "barrier=%u"},
187 {Opt_err_panic, "errors=panic"},
188 {Opt_err_ro, "errors=remount-ro"},
189 {Opt_intr, "intr"},
190 {Opt_nointr, "nointr"},
191 {Opt_hb_none, OCFS2_HB_NONE},
192 {Opt_hb_local, OCFS2_HB_LOCAL},
193 {Opt_data_ordered, "data=ordered"},
194 {Opt_data_writeback, "data=writeback"},
195 {Opt_atime_quantum, "atime_quantum=%u"},
196 {Opt_slot, "preferred_slot=%u"},
197 {Opt_commit, "commit=%u"},
198 {Opt_localalloc, "localalloc=%d"},
199 {Opt_localflocks, "localflocks"},
200 {Opt_stack, "cluster_stack=%s"},
201 {Opt_user_xattr, "user_xattr"},
202 {Opt_nouser_xattr, "nouser_xattr"},
203 {Opt_inode64, "inode64"},
204 {Opt_acl, "acl"},
205 {Opt_noacl, "noacl"},
206 {Opt_usrquota, "usrquota"},
207 {Opt_grpquota, "grpquota"},
208 {Opt_resv_level, "resv_level=%u"},
209 {Opt_dir_resv_level, "dir_resv_level=%u"},
210 {Opt_err, NULL}
211 };
212
213 #ifdef CONFIG_DEBUG_FS
214 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
215 {
216 struct ocfs2_cluster_connection *cconn = osb->cconn;
217 struct ocfs2_recovery_map *rm = osb->recovery_map;
218 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
219 int i, out = 0;
220
221 out += snprintf(buf + out, len - out,
222 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
223 "Device", osb->dev_str, osb->uuid_str,
224 osb->fs_generation, osb->vol_label);
225
226 out += snprintf(buf + out, len - out,
227 "%10s => State: %d Flags: 0x%lX\n", "Volume",
228 atomic_read(&osb->vol_state), osb->osb_flags);
229
230 out += snprintf(buf + out, len - out,
231 "%10s => Block: %lu Cluster: %d\n", "Sizes",
232 osb->sb->s_blocksize, osb->s_clustersize);
233
234 out += snprintf(buf + out, len - out,
235 "%10s => Compat: 0x%X Incompat: 0x%X "
236 "ROcompat: 0x%X\n",
237 "Features", osb->s_feature_compat,
238 osb->s_feature_incompat, osb->s_feature_ro_compat);
239
240 out += snprintf(buf + out, len - out,
241 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
242 osb->s_mount_opt, osb->s_atime_quantum);
243
244 if (cconn) {
245 out += snprintf(buf + out, len - out,
246 "%10s => Stack: %s Name: %*s "
247 "Version: %d.%d\n", "Cluster",
248 (*osb->osb_cluster_stack == '\0' ?
249 "o2cb" : osb->osb_cluster_stack),
250 cconn->cc_namelen, cconn->cc_name,
251 cconn->cc_version.pv_major,
252 cconn->cc_version.pv_minor);
253 }
254
255 spin_lock(&osb->dc_task_lock);
256 out += snprintf(buf + out, len - out,
257 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
258 "WorkSeq: %lu\n", "DownCnvt",
259 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
260 osb->blocked_lock_count, osb->dc_wake_sequence,
261 osb->dc_work_sequence);
262 spin_unlock(&osb->dc_task_lock);
263
264 spin_lock(&osb->osb_lock);
265 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
266 "Recovery",
267 (osb->recovery_thread_task ?
268 task_pid_nr(osb->recovery_thread_task) : -1));
269 if (rm->rm_used == 0)
270 out += snprintf(buf + out, len - out, " None\n");
271 else {
272 for (i = 0; i < rm->rm_used; i++)
273 out += snprintf(buf + out, len - out, " %d",
274 rm->rm_entries[i]);
275 out += snprintf(buf + out, len - out, "\n");
276 }
277 spin_unlock(&osb->osb_lock);
278
279 out += snprintf(buf + out, len - out,
280 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
281 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
282 osb->osb_commit_interval,
283 atomic_read(&osb->needs_checkpoint));
284
285 out += snprintf(buf + out, len - out,
286 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
287 "Journal", osb->journal->j_state,
288 osb->journal->j_trans_id,
289 atomic_read(&osb->journal->j_num_trans));
290
291 out += snprintf(buf + out, len - out,
292 "%10s => GlobalAllocs: %d LocalAllocs: %d "
293 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
294 "Stats",
295 atomic_read(&osb->alloc_stats.bitmap_data),
296 atomic_read(&osb->alloc_stats.local_data),
297 atomic_read(&osb->alloc_stats.bg_allocs),
298 atomic_read(&osb->alloc_stats.moves),
299 atomic_read(&osb->alloc_stats.bg_extends));
300
301 out += snprintf(buf + out, len - out,
302 "%10s => State: %u Descriptor: %llu Size: %u bits "
303 "Default: %u bits\n",
304 "LocalAlloc", osb->local_alloc_state,
305 (unsigned long long)osb->la_last_gd,
306 osb->local_alloc_bits, osb->local_alloc_default_bits);
307
308 spin_lock(&osb->osb_lock);
309 out += snprintf(buf + out, len - out,
310 "%10s => InodeSlot: %d StolenInodes: %d, "
311 "MetaSlot: %d StolenMeta: %d\n", "Steal",
312 osb->s_inode_steal_slot,
313 atomic_read(&osb->s_num_inodes_stolen),
314 osb->s_meta_steal_slot,
315 atomic_read(&osb->s_num_meta_stolen));
316 spin_unlock(&osb->osb_lock);
317
318 out += snprintf(buf + out, len - out, "OrphanScan => ");
319 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
320 os->os_count, os->os_seqno);
321 out += snprintf(buf + out, len - out, " Last Scan: ");
322 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
323 out += snprintf(buf + out, len - out, "Disabled\n");
324 else
325 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
326 (get_seconds() - os->os_scantime.tv_sec));
327
328 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
329 "Slots", "Num", "RecoGen");
330 for (i = 0; i < osb->max_slots; ++i) {
331 out += snprintf(buf + out, len - out,
332 "%10s %c %3d %10d\n",
333 " ",
334 (i == osb->slot_num ? '*' : ' '),
335 i, osb->slot_recovery_generations[i]);
336 }
337
338 return out;
339 }
340
341 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
342 {
343 struct ocfs2_super *osb = inode->i_private;
344 char *buf = NULL;
345
346 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
347 if (!buf)
348 goto bail;
349
350 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
351
352 file->private_data = buf;
353
354 return 0;
355 bail:
356 return -ENOMEM;
357 }
358
359 static int ocfs2_debug_release(struct inode *inode, struct file *file)
360 {
361 kfree(file->private_data);
362 return 0;
363 }
364
365 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
366 size_t nbytes, loff_t *ppos)
367 {
368 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
369 i_size_read(file->f_mapping->host));
370 }
371 #else
372 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
373 {
374 return 0;
375 }
376 static int ocfs2_debug_release(struct inode *inode, struct file *file)
377 {
378 return 0;
379 }
380 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
381 size_t nbytes, loff_t *ppos)
382 {
383 return 0;
384 }
385 #endif /* CONFIG_DEBUG_FS */
386
387 static const struct file_operations ocfs2_osb_debug_fops = {
388 .open = ocfs2_osb_debug_open,
389 .release = ocfs2_debug_release,
390 .read = ocfs2_debug_read,
391 .llseek = generic_file_llseek,
392 };
393
394 static int ocfs2_sync_fs(struct super_block *sb, int wait)
395 {
396 int status;
397 tid_t target;
398 struct ocfs2_super *osb = OCFS2_SB(sb);
399
400 if (ocfs2_is_hard_readonly(osb))
401 return -EROFS;
402
403 if (wait) {
404 status = ocfs2_flush_truncate_log(osb);
405 if (status < 0)
406 mlog_errno(status);
407 } else {
408 ocfs2_schedule_truncate_log_flush(osb, 0);
409 }
410
411 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
412 &target)) {
413 if (wait)
414 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
415 target);
416 }
417 return 0;
418 }
419
420 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
421 {
422 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
423 && (ino == USER_QUOTA_SYSTEM_INODE
424 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
425 return 0;
426 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
427 && (ino == GROUP_QUOTA_SYSTEM_INODE
428 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
429 return 0;
430 return 1;
431 }
432
433 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
434 {
435 struct inode *new = NULL;
436 int status = 0;
437 int i;
438
439 mlog_entry_void();
440
441 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
442 if (IS_ERR(new)) {
443 status = PTR_ERR(new);
444 mlog_errno(status);
445 goto bail;
446 }
447 osb->root_inode = new;
448
449 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
450 if (IS_ERR(new)) {
451 status = PTR_ERR(new);
452 mlog_errno(status);
453 goto bail;
454 }
455 osb->sys_root_inode = new;
456
457 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
458 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
459 if (!ocfs2_need_system_inode(osb, i))
460 continue;
461 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
462 if (!new) {
463 ocfs2_release_system_inodes(osb);
464 status = -EINVAL;
465 mlog_errno(status);
466 /* FIXME: Should ERROR_RO_FS */
467 mlog(ML_ERROR, "Unable to load system inode %d, "
468 "possibly corrupt fs?", i);
469 goto bail;
470 }
471 // the array now has one ref, so drop this one
472 iput(new);
473 }
474
475 bail:
476 mlog_exit(status);
477 return status;
478 }
479
480 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
481 {
482 struct inode *new = NULL;
483 int status = 0;
484 int i;
485
486 mlog_entry_void();
487
488 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
489 i < NUM_SYSTEM_INODES;
490 i++) {
491 if (!ocfs2_need_system_inode(osb, i))
492 continue;
493 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
494 if (!new) {
495 ocfs2_release_system_inodes(osb);
496 status = -EINVAL;
497 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
498 status, i, osb->slot_num);
499 goto bail;
500 }
501 /* the array now has one ref, so drop this one */
502 iput(new);
503 }
504
505 bail:
506 mlog_exit(status);
507 return status;
508 }
509
510 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
511 {
512 int i;
513 struct inode *inode;
514
515 mlog_entry_void();
516
517 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
518 inode = osb->system_inodes[i];
519 if (inode) {
520 iput(inode);
521 osb->system_inodes[i] = NULL;
522 }
523 }
524
525 inode = osb->sys_root_inode;
526 if (inode) {
527 iput(inode);
528 osb->sys_root_inode = NULL;
529 }
530
531 inode = osb->root_inode;
532 if (inode) {
533 iput(inode);
534 osb->root_inode = NULL;
535 }
536
537 mlog_exit(0);
538 }
539
540 /* We're allocating fs objects, use GFP_NOFS */
541 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
542 {
543 struct ocfs2_inode_info *oi;
544
545 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
546 if (!oi)
547 return NULL;
548
549 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
550 return &oi->vfs_inode;
551 }
552
553 static void ocfs2_destroy_inode(struct inode *inode)
554 {
555 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
556 }
557
558 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
559 unsigned int cbits)
560 {
561 unsigned int bytes = 1 << cbits;
562 unsigned int trim = bytes;
563 unsigned int bitshift = 32;
564
565 /*
566 * i_size and all block offsets in ocfs2 are always 64 bits
567 * wide. i_clusters is 32 bits, in cluster-sized units. So on
568 * 64 bit platforms, cluster size will be the limiting factor.
569 */
570
571 #if BITS_PER_LONG == 32
572 # if defined(CONFIG_LBDAF)
573 BUILD_BUG_ON(sizeof(sector_t) != 8);
574 /*
575 * We might be limited by page cache size.
576 */
577 if (bytes > PAGE_CACHE_SIZE) {
578 bytes = PAGE_CACHE_SIZE;
579 trim = 1;
580 /*
581 * Shift by 31 here so that we don't get larger than
582 * MAX_LFS_FILESIZE
583 */
584 bitshift = 31;
585 }
586 # else
587 /*
588 * We are limited by the size of sector_t. Use block size, as
589 * that's what we expose to the VFS.
590 */
591 bytes = 1 << bbits;
592 trim = 1;
593 bitshift = 31;
594 # endif
595 #endif
596
597 /*
598 * Trim by a whole cluster when we can actually approach the
599 * on-disk limits. Otherwise we can overflow i_clusters when
600 * an extent start is at the max offset.
601 */
602 return (((unsigned long long)bytes) << bitshift) - trim;
603 }
604
605 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
606 {
607 int incompat_features;
608 int ret = 0;
609 struct mount_options parsed_options;
610 struct ocfs2_super *osb = OCFS2_SB(sb);
611
612 lock_kernel();
613
614 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
615 !ocfs2_check_set_options(sb, &parsed_options)) {
616 ret = -EINVAL;
617 goto out;
618 }
619
620 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
621 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
622 ret = -EINVAL;
623 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
624 goto out;
625 }
626
627 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
628 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
629 ret = -EINVAL;
630 mlog(ML_ERROR, "Cannot change data mode on remount\n");
631 goto out;
632 }
633
634 /* Probably don't want this on remount; it might
635 * mess with other nodes */
636 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
637 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
638 ret = -EINVAL;
639 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
640 goto out;
641 }
642
643 /* We're going to/from readonly mode. */
644 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
645 /* Disable quota accounting before remounting RO */
646 if (*flags & MS_RDONLY) {
647 ret = ocfs2_susp_quotas(osb, 0);
648 if (ret < 0)
649 goto out;
650 }
651 /* Lock here so the check of HARD_RO and the potential
652 * setting of SOFT_RO is atomic. */
653 spin_lock(&osb->osb_lock);
654 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
655 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
656 ret = -EROFS;
657 goto unlock_osb;
658 }
659
660 if (*flags & MS_RDONLY) {
661 mlog(0, "Going to ro mode.\n");
662 sb->s_flags |= MS_RDONLY;
663 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
664 } else {
665 mlog(0, "Making ro filesystem writeable.\n");
666
667 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
668 mlog(ML_ERROR, "Cannot remount RDWR "
669 "filesystem due to previous errors.\n");
670 ret = -EROFS;
671 goto unlock_osb;
672 }
673 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
674 if (incompat_features) {
675 mlog(ML_ERROR, "Cannot remount RDWR because "
676 "of unsupported optional features "
677 "(%x).\n", incompat_features);
678 ret = -EINVAL;
679 goto unlock_osb;
680 }
681 sb->s_flags &= ~MS_RDONLY;
682 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
683 }
684 unlock_osb:
685 spin_unlock(&osb->osb_lock);
686 /* Enable quota accounting after remounting RW */
687 if (!ret && !(*flags & MS_RDONLY)) {
688 if (sb_any_quota_suspended(sb))
689 ret = ocfs2_susp_quotas(osb, 1);
690 else
691 ret = ocfs2_enable_quotas(osb);
692 if (ret < 0) {
693 /* Return back changes... */
694 spin_lock(&osb->osb_lock);
695 sb->s_flags |= MS_RDONLY;
696 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
697 spin_unlock(&osb->osb_lock);
698 goto out;
699 }
700 }
701 }
702
703 if (!ret) {
704 /* Only save off the new mount options in case of a successful
705 * remount. */
706 osb->s_mount_opt = parsed_options.mount_opt;
707 osb->s_atime_quantum = parsed_options.atime_quantum;
708 osb->preferred_slot = parsed_options.slot;
709 if (parsed_options.commit_interval)
710 osb->osb_commit_interval = parsed_options.commit_interval;
711
712 if (!ocfs2_is_hard_readonly(osb))
713 ocfs2_set_journal_params(osb);
714
715 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
716 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
717 MS_POSIXACL : 0);
718 }
719 out:
720 unlock_kernel();
721 return ret;
722 }
723
724 static int ocfs2_sb_probe(struct super_block *sb,
725 struct buffer_head **bh,
726 int *sector_size,
727 struct ocfs2_blockcheck_stats *stats)
728 {
729 int status, tmpstat;
730 struct ocfs1_vol_disk_hdr *hdr;
731 struct ocfs2_dinode *di;
732 int blksize;
733
734 *bh = NULL;
735
736 /* may be > 512 */
737 *sector_size = bdev_logical_block_size(sb->s_bdev);
738 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
739 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
740 *sector_size, OCFS2_MAX_BLOCKSIZE);
741 status = -EINVAL;
742 goto bail;
743 }
744
745 /* Can this really happen? */
746 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
747 *sector_size = OCFS2_MIN_BLOCKSIZE;
748
749 /* check block zero for old format */
750 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
751 if (status < 0) {
752 mlog_errno(status);
753 goto bail;
754 }
755 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
756 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
757 mlog(ML_ERROR, "incompatible version: %u.%u\n",
758 hdr->major_version, hdr->minor_version);
759 status = -EINVAL;
760 }
761 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
762 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
763 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
764 hdr->signature);
765 status = -EINVAL;
766 }
767 brelse(*bh);
768 *bh = NULL;
769 if (status < 0) {
770 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
771 "upgraded before mounting with ocfs v2\n");
772 goto bail;
773 }
774
775 /*
776 * Now check at magic offset for 512, 1024, 2048, 4096
777 * blocksizes. 4096 is the maximum blocksize because it is
778 * the minimum clustersize.
779 */
780 status = -EINVAL;
781 for (blksize = *sector_size;
782 blksize <= OCFS2_MAX_BLOCKSIZE;
783 blksize <<= 1) {
784 tmpstat = ocfs2_get_sector(sb, bh,
785 OCFS2_SUPER_BLOCK_BLKNO,
786 blksize);
787 if (tmpstat < 0) {
788 status = tmpstat;
789 mlog_errno(status);
790 break;
791 }
792 di = (struct ocfs2_dinode *) (*bh)->b_data;
793 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
794 spin_lock_init(&stats->b_lock);
795 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
796 if (tmpstat < 0) {
797 brelse(*bh);
798 *bh = NULL;
799 }
800 if (tmpstat != -EAGAIN) {
801 status = tmpstat;
802 break;
803 }
804 }
805
806 bail:
807 return status;
808 }
809
810 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
811 {
812 if (ocfs2_mount_local(osb)) {
813 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
814 mlog(ML_ERROR, "Cannot heartbeat on a locally "
815 "mounted device.\n");
816 return -EINVAL;
817 }
818 }
819
820 if (ocfs2_userspace_stack(osb)) {
821 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
822 mlog(ML_ERROR, "Userspace stack expected, but "
823 "o2cb heartbeat arguments passed to mount\n");
824 return -EINVAL;
825 }
826 }
827
828 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
829 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
830 !ocfs2_userspace_stack(osb)) {
831 mlog(ML_ERROR, "Heartbeat has to be started to mount "
832 "a read-write clustered device.\n");
833 return -EINVAL;
834 }
835 }
836
837 return 0;
838 }
839
840 /*
841 * If we're using a userspace stack, mount should have passed
842 * a name that matches the disk. If not, mount should not
843 * have passed a stack.
844 */
845 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
846 struct mount_options *mopt)
847 {
848 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
849 mlog(ML_ERROR,
850 "cluster stack passed to mount, but this filesystem "
851 "does not support it\n");
852 return -EINVAL;
853 }
854
855 if (ocfs2_userspace_stack(osb) &&
856 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
857 OCFS2_STACK_LABEL_LEN)) {
858 mlog(ML_ERROR,
859 "cluster stack passed to mount (\"%s\") does not "
860 "match the filesystem (\"%s\")\n",
861 mopt->cluster_stack,
862 osb->osb_cluster_stack);
863 return -EINVAL;
864 }
865
866 return 0;
867 }
868
869 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
870 {
871 int type;
872 struct super_block *sb = osb->sb;
873 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
874 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
875 int status = 0;
876
877 for (type = 0; type < MAXQUOTAS; type++) {
878 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
879 continue;
880 if (unsuspend)
881 status = dquot_resume(sb, type);
882 else {
883 struct ocfs2_mem_dqinfo *oinfo;
884
885 /* Cancel periodic syncing before suspending */
886 oinfo = sb_dqinfo(sb, type)->dqi_priv;
887 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
888 status = dquot_suspend(sb, type);
889 }
890 if (status < 0)
891 break;
892 }
893 if (status < 0)
894 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
895 "remount (error = %d).\n", status);
896 return status;
897 }
898
899 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
900 {
901 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
902 struct super_block *sb = osb->sb;
903 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
904 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
905 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
906 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
907 int status;
908 int type;
909
910 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
911 for (type = 0; type < MAXQUOTAS; type++) {
912 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
913 continue;
914 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
915 osb->slot_num);
916 if (!inode[type]) {
917 status = -ENOENT;
918 goto out_quota_off;
919 }
920 status = dquot_enable(inode[type], type, QFMT_OCFS2,
921 DQUOT_USAGE_ENABLED);
922 if (status < 0)
923 goto out_quota_off;
924 }
925
926 for (type = 0; type < MAXQUOTAS; type++)
927 iput(inode[type]);
928 return 0;
929 out_quota_off:
930 ocfs2_disable_quotas(osb);
931 for (type = 0; type < MAXQUOTAS; type++)
932 iput(inode[type]);
933 mlog_errno(status);
934 return status;
935 }
936
937 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
938 {
939 int type;
940 struct inode *inode;
941 struct super_block *sb = osb->sb;
942 struct ocfs2_mem_dqinfo *oinfo;
943
944 /* We mostly ignore errors in this function because there's not much
945 * we can do when we see them */
946 for (type = 0; type < MAXQUOTAS; type++) {
947 if (!sb_has_quota_loaded(sb, type))
948 continue;
949 /* Cancel periodic syncing before we grab dqonoff_mutex */
950 oinfo = sb_dqinfo(sb, type)->dqi_priv;
951 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
952 inode = igrab(sb->s_dquot.files[type]);
953 /* Turn off quotas. This will remove all dquot structures from
954 * memory and so they will be automatically synced to global
955 * quota files */
956 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
957 DQUOT_LIMITS_ENABLED);
958 if (!inode)
959 continue;
960 iput(inode);
961 }
962 }
963
964 /* Handle quota on quotactl */
965 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
966 char *path)
967 {
968 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
969 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
970
971 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
972 return -EINVAL;
973
974 return dquot_enable(sb_dqopt(sb)->files[type], type,
975 format_id, DQUOT_LIMITS_ENABLED);
976 }
977
978 /* Handle quota off quotactl */
979 static int ocfs2_quota_off(struct super_block *sb, int type)
980 {
981 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
982 }
983
984 static const struct quotactl_ops ocfs2_quotactl_ops = {
985 .quota_on = ocfs2_quota_on,
986 .quota_off = ocfs2_quota_off,
987 .quota_sync = dquot_quota_sync,
988 .get_info = dquot_get_dqinfo,
989 .set_info = dquot_set_dqinfo,
990 .get_dqblk = dquot_get_dqblk,
991 .set_dqblk = dquot_set_dqblk,
992 };
993
994 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
995 {
996 struct dentry *root;
997 int status, sector_size;
998 struct mount_options parsed_options;
999 struct inode *inode = NULL;
1000 struct ocfs2_super *osb = NULL;
1001 struct buffer_head *bh = NULL;
1002 char nodestr[8];
1003 struct ocfs2_blockcheck_stats stats;
1004
1005 mlog_entry("%p, %p, %i", sb, data, silent);
1006
1007 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1008 status = -EINVAL;
1009 goto read_super_error;
1010 }
1011
1012 /* probe for superblock */
1013 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1014 if (status < 0) {
1015 mlog(ML_ERROR, "superblock probe failed!\n");
1016 goto read_super_error;
1017 }
1018
1019 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1020 osb = OCFS2_SB(sb);
1021 if (status < 0) {
1022 mlog_errno(status);
1023 goto read_super_error;
1024 }
1025 brelse(bh);
1026 bh = NULL;
1027
1028 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1029 status = -EINVAL;
1030 goto read_super_error;
1031 }
1032 osb->s_mount_opt = parsed_options.mount_opt;
1033 osb->s_atime_quantum = parsed_options.atime_quantum;
1034 osb->preferred_slot = parsed_options.slot;
1035 osb->osb_commit_interval = parsed_options.commit_interval;
1036
1037 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1038 osb->osb_resv_level = parsed_options.resv_level;
1039 osb->osb_dir_resv_level = parsed_options.resv_level;
1040 if (parsed_options.dir_resv_level == -1)
1041 osb->osb_dir_resv_level = parsed_options.resv_level;
1042 else
1043 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1044
1045 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1046 if (status)
1047 goto read_super_error;
1048
1049 sb->s_magic = OCFS2_SUPER_MAGIC;
1050
1051 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1052 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1053
1054 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1055 * heartbeat=none */
1056 if (bdev_read_only(sb->s_bdev)) {
1057 if (!(sb->s_flags & MS_RDONLY)) {
1058 status = -EACCES;
1059 mlog(ML_ERROR, "Readonly device detected but readonly "
1060 "mount was not specified.\n");
1061 goto read_super_error;
1062 }
1063
1064 /* You should not be able to start a local heartbeat
1065 * on a readonly device. */
1066 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1067 status = -EROFS;
1068 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1069 "device.\n");
1070 goto read_super_error;
1071 }
1072
1073 status = ocfs2_check_journals_nolocks(osb);
1074 if (status < 0) {
1075 if (status == -EROFS)
1076 mlog(ML_ERROR, "Recovery required on readonly "
1077 "file system, but write access is "
1078 "unavailable.\n");
1079 else
1080 mlog_errno(status);
1081 goto read_super_error;
1082 }
1083
1084 ocfs2_set_ro_flag(osb, 1);
1085
1086 printk(KERN_NOTICE "Readonly device detected. No cluster "
1087 "services will be utilized for this mount. Recovery "
1088 "will be skipped.\n");
1089 }
1090
1091 if (!ocfs2_is_hard_readonly(osb)) {
1092 if (sb->s_flags & MS_RDONLY)
1093 ocfs2_set_ro_flag(osb, 0);
1094 }
1095
1096 status = ocfs2_verify_heartbeat(osb);
1097 if (status < 0) {
1098 mlog_errno(status);
1099 goto read_super_error;
1100 }
1101
1102 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1103 ocfs2_debugfs_root);
1104 if (!osb->osb_debug_root) {
1105 status = -EINVAL;
1106 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1107 goto read_super_error;
1108 }
1109
1110 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1111 osb->osb_debug_root,
1112 osb,
1113 &ocfs2_osb_debug_fops);
1114 if (!osb->osb_ctxt) {
1115 status = -EINVAL;
1116 mlog_errno(status);
1117 goto read_super_error;
1118 }
1119
1120 if (ocfs2_meta_ecc(osb)) {
1121 status = ocfs2_blockcheck_stats_debugfs_install(
1122 &osb->osb_ecc_stats,
1123 osb->osb_debug_root);
1124 if (status) {
1125 mlog(ML_ERROR,
1126 "Unable to create blockcheck statistics "
1127 "files\n");
1128 goto read_super_error;
1129 }
1130 }
1131
1132 status = ocfs2_mount_volume(sb);
1133 if (osb->root_inode)
1134 inode = igrab(osb->root_inode);
1135
1136 if (status < 0)
1137 goto read_super_error;
1138
1139 if (!inode) {
1140 status = -EIO;
1141 mlog_errno(status);
1142 goto read_super_error;
1143 }
1144
1145 root = d_alloc_root(inode);
1146 if (!root) {
1147 status = -ENOMEM;
1148 mlog_errno(status);
1149 goto read_super_error;
1150 }
1151
1152 sb->s_root = root;
1153
1154 ocfs2_complete_mount_recovery(osb);
1155
1156 if (ocfs2_mount_local(osb))
1157 snprintf(nodestr, sizeof(nodestr), "local");
1158 else
1159 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1160
1161 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1162 "with %s data mode.\n",
1163 osb->dev_str, nodestr, osb->slot_num,
1164 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1165 "ordered");
1166
1167 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1168 wake_up(&osb->osb_mount_event);
1169
1170 /* Now we can initialize quotas because we can afford to wait
1171 * for cluster locks recovery now. That also means that truncation
1172 * log recovery can happen but that waits for proper quota setup */
1173 if (!(sb->s_flags & MS_RDONLY)) {
1174 status = ocfs2_enable_quotas(osb);
1175 if (status < 0) {
1176 /* We have to err-out specially here because
1177 * s_root is already set */
1178 mlog_errno(status);
1179 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1180 wake_up(&osb->osb_mount_event);
1181 mlog_exit(status);
1182 return status;
1183 }
1184 }
1185
1186 ocfs2_complete_quota_recovery(osb);
1187
1188 /* Now we wake up again for processes waiting for quotas */
1189 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1190 wake_up(&osb->osb_mount_event);
1191
1192 /* Start this when the mount is almost sure of being successful */
1193 ocfs2_orphan_scan_start(osb);
1194
1195 mlog_exit(status);
1196 return status;
1197
1198 read_super_error:
1199 brelse(bh);
1200
1201 if (inode)
1202 iput(inode);
1203
1204 if (osb) {
1205 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1206 wake_up(&osb->osb_mount_event);
1207 ocfs2_dismount_volume(sb, 1);
1208 }
1209
1210 mlog_exit(status);
1211 return status;
1212 }
1213
1214 static int ocfs2_get_sb(struct file_system_type *fs_type,
1215 int flags,
1216 const char *dev_name,
1217 void *data,
1218 struct vfsmount *mnt)
1219 {
1220 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1221 mnt);
1222 }
1223
1224 static void ocfs2_kill_sb(struct super_block *sb)
1225 {
1226 struct ocfs2_super *osb = OCFS2_SB(sb);
1227
1228 /* Failed mount? */
1229 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1230 goto out;
1231
1232 /* Prevent further queueing of inode drop events */
1233 spin_lock(&dentry_list_lock);
1234 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1235 spin_unlock(&dentry_list_lock);
1236 /* Wait for work to finish and/or remove it */
1237 cancel_work_sync(&osb->dentry_lock_work);
1238 out:
1239 kill_block_super(sb);
1240 }
1241
1242 static struct file_system_type ocfs2_fs_type = {
1243 .owner = THIS_MODULE,
1244 .name = "ocfs2",
1245 .get_sb = ocfs2_get_sb, /* is this called when we mount
1246 * the fs? */
1247 .kill_sb = ocfs2_kill_sb,
1248
1249 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1250 .next = NULL
1251 };
1252
1253 static int ocfs2_check_set_options(struct super_block *sb,
1254 struct mount_options *options)
1255 {
1256 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1257 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1258 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1259 mlog(ML_ERROR, "User quotas were requested, but this "
1260 "filesystem does not have the feature enabled.\n");
1261 return 0;
1262 }
1263 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1264 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1265 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1266 mlog(ML_ERROR, "Group quotas were requested, but this "
1267 "filesystem does not have the feature enabled.\n");
1268 return 0;
1269 }
1270 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1271 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1272 mlog(ML_ERROR, "ACL support requested but extended attributes "
1273 "feature is not enabled\n");
1274 return 0;
1275 }
1276 /* No ACL setting specified? Use XATTR feature... */
1277 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1278 OCFS2_MOUNT_NO_POSIX_ACL))) {
1279 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1280 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1281 else
1282 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1283 }
1284 return 1;
1285 }
1286
1287 static int ocfs2_parse_options(struct super_block *sb,
1288 char *options,
1289 struct mount_options *mopt,
1290 int is_remount)
1291 {
1292 int status;
1293 char *p;
1294
1295 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1296 options ? options : "(none)");
1297
1298 mopt->commit_interval = 0;
1299 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1300 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1301 mopt->slot = OCFS2_INVALID_SLOT;
1302 mopt->localalloc_opt = -1;
1303 mopt->cluster_stack[0] = '\0';
1304 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1305 mopt->dir_resv_level = -1;
1306
1307 if (!options) {
1308 status = 1;
1309 goto bail;
1310 }
1311
1312 while ((p = strsep(&options, ",")) != NULL) {
1313 int token, option;
1314 substring_t args[MAX_OPT_ARGS];
1315
1316 if (!*p)
1317 continue;
1318
1319 token = match_token(p, tokens, args);
1320 switch (token) {
1321 case Opt_hb_local:
1322 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1323 break;
1324 case Opt_hb_none:
1325 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
1326 break;
1327 case Opt_barrier:
1328 if (match_int(&args[0], &option)) {
1329 status = 0;
1330 goto bail;
1331 }
1332 if (option)
1333 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1334 else
1335 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1336 break;
1337 case Opt_intr:
1338 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1339 break;
1340 case Opt_nointr:
1341 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1342 break;
1343 case Opt_err_panic:
1344 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1345 break;
1346 case Opt_err_ro:
1347 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1348 break;
1349 case Opt_data_ordered:
1350 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1351 break;
1352 case Opt_data_writeback:
1353 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1354 break;
1355 case Opt_user_xattr:
1356 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1357 break;
1358 case Opt_nouser_xattr:
1359 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1360 break;
1361 case Opt_atime_quantum:
1362 if (match_int(&args[0], &option)) {
1363 status = 0;
1364 goto bail;
1365 }
1366 if (option >= 0)
1367 mopt->atime_quantum = option;
1368 break;
1369 case Opt_slot:
1370 option = 0;
1371 if (match_int(&args[0], &option)) {
1372 status = 0;
1373 goto bail;
1374 }
1375 if (option)
1376 mopt->slot = (s16)option;
1377 break;
1378 case Opt_commit:
1379 option = 0;
1380 if (match_int(&args[0], &option)) {
1381 status = 0;
1382 goto bail;
1383 }
1384 if (option < 0)
1385 return 0;
1386 if (option == 0)
1387 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1388 mopt->commit_interval = HZ * option;
1389 break;
1390 case Opt_localalloc:
1391 option = 0;
1392 if (match_int(&args[0], &option)) {
1393 status = 0;
1394 goto bail;
1395 }
1396 if (option >= 0)
1397 mopt->localalloc_opt = option;
1398 break;
1399 case Opt_localflocks:
1400 /*
1401 * Changing this during remount could race
1402 * flock() requests, or "unbalance" existing
1403 * ones (e.g., a lock is taken in one mode but
1404 * dropped in the other). If users care enough
1405 * to flip locking modes during remount, we
1406 * could add a "local" flag to individual
1407 * flock structures for proper tracking of
1408 * state.
1409 */
1410 if (!is_remount)
1411 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1412 break;
1413 case Opt_stack:
1414 /* Check both that the option we were passed
1415 * is of the right length and that it is a proper
1416 * string of the right length.
1417 */
1418 if (((args[0].to - args[0].from) !=
1419 OCFS2_STACK_LABEL_LEN) ||
1420 (strnlen(args[0].from,
1421 OCFS2_STACK_LABEL_LEN) !=
1422 OCFS2_STACK_LABEL_LEN)) {
1423 mlog(ML_ERROR,
1424 "Invalid cluster_stack option\n");
1425 status = 0;
1426 goto bail;
1427 }
1428 memcpy(mopt->cluster_stack, args[0].from,
1429 OCFS2_STACK_LABEL_LEN);
1430 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1431 break;
1432 case Opt_inode64:
1433 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1434 break;
1435 case Opt_usrquota:
1436 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1437 break;
1438 case Opt_grpquota:
1439 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1440 break;
1441 case Opt_acl:
1442 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1443 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1444 break;
1445 case Opt_noacl:
1446 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1447 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1448 break;
1449 case Opt_resv_level:
1450 if (is_remount)
1451 break;
1452 if (match_int(&args[0], &option)) {
1453 status = 0;
1454 goto bail;
1455 }
1456 if (option >= OCFS2_MIN_RESV_LEVEL &&
1457 option < OCFS2_MAX_RESV_LEVEL)
1458 mopt->resv_level = option;
1459 break;
1460 case Opt_dir_resv_level:
1461 if (is_remount)
1462 break;
1463 if (match_int(&args[0], &option)) {
1464 status = 0;
1465 goto bail;
1466 }
1467 if (option >= OCFS2_MIN_RESV_LEVEL &&
1468 option < OCFS2_MAX_RESV_LEVEL)
1469 mopt->dir_resv_level = option;
1470 break;
1471 default:
1472 mlog(ML_ERROR,
1473 "Unrecognized mount option \"%s\" "
1474 "or missing value\n", p);
1475 status = 0;
1476 goto bail;
1477 }
1478 }
1479
1480 status = 1;
1481
1482 bail:
1483 mlog_exit(status);
1484 return status;
1485 }
1486
1487 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1488 {
1489 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1490 unsigned long opts = osb->s_mount_opt;
1491 unsigned int local_alloc_megs;
1492
1493 if (opts & OCFS2_MOUNT_HB_LOCAL)
1494 seq_printf(s, ",_netdev,heartbeat=local");
1495 else
1496 seq_printf(s, ",heartbeat=none");
1497
1498 if (opts & OCFS2_MOUNT_NOINTR)
1499 seq_printf(s, ",nointr");
1500
1501 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1502 seq_printf(s, ",data=writeback");
1503 else
1504 seq_printf(s, ",data=ordered");
1505
1506 if (opts & OCFS2_MOUNT_BARRIER)
1507 seq_printf(s, ",barrier=1");
1508
1509 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1510 seq_printf(s, ",errors=panic");
1511 else
1512 seq_printf(s, ",errors=remount-ro");
1513
1514 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1515 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1516
1517 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1518 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1519
1520 if (osb->osb_commit_interval)
1521 seq_printf(s, ",commit=%u",
1522 (unsigned) (osb->osb_commit_interval / HZ));
1523
1524 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1525 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1526 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1527
1528 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1529 seq_printf(s, ",localflocks,");
1530
1531 if (osb->osb_cluster_stack[0])
1532 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1533 osb->osb_cluster_stack);
1534 if (opts & OCFS2_MOUNT_USRQUOTA)
1535 seq_printf(s, ",usrquota");
1536 if (opts & OCFS2_MOUNT_GRPQUOTA)
1537 seq_printf(s, ",grpquota");
1538
1539 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1540 seq_printf(s, ",nouser_xattr");
1541 else
1542 seq_printf(s, ",user_xattr");
1543
1544 if (opts & OCFS2_MOUNT_INODE64)
1545 seq_printf(s, ",inode64");
1546
1547 if (opts & OCFS2_MOUNT_POSIX_ACL)
1548 seq_printf(s, ",acl");
1549 else
1550 seq_printf(s, ",noacl");
1551
1552 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1553 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1554
1555 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1556 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1557
1558 return 0;
1559 }
1560
1561 static int __init ocfs2_init(void)
1562 {
1563 int status;
1564
1565 mlog_entry_void();
1566
1567 ocfs2_print_version();
1568
1569 status = init_ocfs2_uptodate_cache();
1570 if (status < 0) {
1571 mlog_errno(status);
1572 goto leave;
1573 }
1574
1575 status = ocfs2_initialize_mem_caches();
1576 if (status < 0) {
1577 mlog_errno(status);
1578 goto leave;
1579 }
1580
1581 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1582 if (!ocfs2_wq) {
1583 status = -ENOMEM;
1584 goto leave;
1585 }
1586
1587 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1588 if (!ocfs2_debugfs_root) {
1589 status = -EFAULT;
1590 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1591 }
1592
1593 status = ocfs2_quota_setup();
1594 if (status)
1595 goto leave;
1596
1597 ocfs2_set_locking_protocol();
1598
1599 status = register_quota_format(&ocfs2_quota_format);
1600 leave:
1601 if (status < 0) {
1602 ocfs2_quota_shutdown();
1603 ocfs2_free_mem_caches();
1604 exit_ocfs2_uptodate_cache();
1605 }
1606
1607 mlog_exit(status);
1608
1609 if (status >= 0) {
1610 return register_filesystem(&ocfs2_fs_type);
1611 } else
1612 return -1;
1613 }
1614
1615 static void __exit ocfs2_exit(void)
1616 {
1617 mlog_entry_void();
1618
1619 ocfs2_quota_shutdown();
1620
1621 if (ocfs2_wq) {
1622 flush_workqueue(ocfs2_wq);
1623 destroy_workqueue(ocfs2_wq);
1624 }
1625
1626 unregister_quota_format(&ocfs2_quota_format);
1627
1628 debugfs_remove(ocfs2_debugfs_root);
1629
1630 ocfs2_free_mem_caches();
1631
1632 unregister_filesystem(&ocfs2_fs_type);
1633
1634 exit_ocfs2_uptodate_cache();
1635
1636 mlog_exit_void();
1637 }
1638
1639 static void ocfs2_put_super(struct super_block *sb)
1640 {
1641 mlog_entry("(0x%p)\n", sb);
1642
1643 lock_kernel();
1644
1645 ocfs2_sync_blockdev(sb);
1646 ocfs2_dismount_volume(sb, 0);
1647
1648 unlock_kernel();
1649
1650 mlog_exit_void();
1651 }
1652
1653 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1654 {
1655 struct ocfs2_super *osb;
1656 u32 numbits, freebits;
1657 int status;
1658 struct ocfs2_dinode *bm_lock;
1659 struct buffer_head *bh = NULL;
1660 struct inode *inode = NULL;
1661
1662 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1663
1664 osb = OCFS2_SB(dentry->d_sb);
1665
1666 inode = ocfs2_get_system_file_inode(osb,
1667 GLOBAL_BITMAP_SYSTEM_INODE,
1668 OCFS2_INVALID_SLOT);
1669 if (!inode) {
1670 mlog(ML_ERROR, "failed to get bitmap inode\n");
1671 status = -EIO;
1672 goto bail;
1673 }
1674
1675 status = ocfs2_inode_lock(inode, &bh, 0);
1676 if (status < 0) {
1677 mlog_errno(status);
1678 goto bail;
1679 }
1680
1681 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1682
1683 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1684 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1685
1686 buf->f_type = OCFS2_SUPER_MAGIC;
1687 buf->f_bsize = dentry->d_sb->s_blocksize;
1688 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1689 buf->f_blocks = ((sector_t) numbits) *
1690 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1691 buf->f_bfree = ((sector_t) freebits) *
1692 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1693 buf->f_bavail = buf->f_bfree;
1694 buf->f_files = numbits;
1695 buf->f_ffree = freebits;
1696 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1697 & 0xFFFFFFFFUL;
1698 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1699 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1700
1701 brelse(bh);
1702
1703 ocfs2_inode_unlock(inode, 0);
1704 status = 0;
1705 bail:
1706 if (inode)
1707 iput(inode);
1708
1709 mlog_exit(status);
1710
1711 return status;
1712 }
1713
1714 static void ocfs2_inode_init_once(void *data)
1715 {
1716 struct ocfs2_inode_info *oi = data;
1717
1718 oi->ip_flags = 0;
1719 oi->ip_open_count = 0;
1720 spin_lock_init(&oi->ip_lock);
1721 ocfs2_extent_map_init(&oi->vfs_inode);
1722 INIT_LIST_HEAD(&oi->ip_io_markers);
1723 oi->ip_dir_start_lookup = 0;
1724
1725 init_rwsem(&oi->ip_alloc_sem);
1726 init_rwsem(&oi->ip_xattr_sem);
1727 mutex_init(&oi->ip_io_mutex);
1728
1729 oi->ip_blkno = 0ULL;
1730 oi->ip_clusters = 0;
1731
1732 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1733
1734 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1735 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1736 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1737
1738 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1739 &ocfs2_inode_caching_ops);
1740
1741 inode_init_once(&oi->vfs_inode);
1742 }
1743
1744 static int ocfs2_initialize_mem_caches(void)
1745 {
1746 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1747 sizeof(struct ocfs2_inode_info),
1748 0,
1749 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1750 SLAB_MEM_SPREAD),
1751 ocfs2_inode_init_once);
1752 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1753 sizeof(struct ocfs2_dquot),
1754 0,
1755 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1756 SLAB_MEM_SPREAD),
1757 NULL);
1758 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1759 sizeof(struct ocfs2_quota_chunk),
1760 0,
1761 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1762 NULL);
1763 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1764 !ocfs2_qf_chunk_cachep) {
1765 if (ocfs2_inode_cachep)
1766 kmem_cache_destroy(ocfs2_inode_cachep);
1767 if (ocfs2_dquot_cachep)
1768 kmem_cache_destroy(ocfs2_dquot_cachep);
1769 if (ocfs2_qf_chunk_cachep)
1770 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1771 return -ENOMEM;
1772 }
1773
1774 return 0;
1775 }
1776
1777 static void ocfs2_free_mem_caches(void)
1778 {
1779 if (ocfs2_inode_cachep)
1780 kmem_cache_destroy(ocfs2_inode_cachep);
1781 ocfs2_inode_cachep = NULL;
1782
1783 if (ocfs2_dquot_cachep)
1784 kmem_cache_destroy(ocfs2_dquot_cachep);
1785 ocfs2_dquot_cachep = NULL;
1786
1787 if (ocfs2_qf_chunk_cachep)
1788 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1789 ocfs2_qf_chunk_cachep = NULL;
1790 }
1791
1792 static int ocfs2_get_sector(struct super_block *sb,
1793 struct buffer_head **bh,
1794 int block,
1795 int sect_size)
1796 {
1797 if (!sb_set_blocksize(sb, sect_size)) {
1798 mlog(ML_ERROR, "unable to set blocksize\n");
1799 return -EIO;
1800 }
1801
1802 *bh = sb_getblk(sb, block);
1803 if (!*bh) {
1804 mlog_errno(-EIO);
1805 return -EIO;
1806 }
1807 lock_buffer(*bh);
1808 if (!buffer_dirty(*bh))
1809 clear_buffer_uptodate(*bh);
1810 unlock_buffer(*bh);
1811 ll_rw_block(READ, 1, bh);
1812 wait_on_buffer(*bh);
1813 if (!buffer_uptodate(*bh)) {
1814 mlog_errno(-EIO);
1815 brelse(*bh);
1816 *bh = NULL;
1817 return -EIO;
1818 }
1819
1820 return 0;
1821 }
1822
1823 static int ocfs2_mount_volume(struct super_block *sb)
1824 {
1825 int status = 0;
1826 int unlock_super = 0;
1827 struct ocfs2_super *osb = OCFS2_SB(sb);
1828
1829 mlog_entry_void();
1830
1831 if (ocfs2_is_hard_readonly(osb))
1832 goto leave;
1833
1834 status = ocfs2_dlm_init(osb);
1835 if (status < 0) {
1836 mlog_errno(status);
1837 goto leave;
1838 }
1839
1840 status = ocfs2_super_lock(osb, 1);
1841 if (status < 0) {
1842 mlog_errno(status);
1843 goto leave;
1844 }
1845 unlock_super = 1;
1846
1847 /* This will load up the node map and add ourselves to it. */
1848 status = ocfs2_find_slot(osb);
1849 if (status < 0) {
1850 mlog_errno(status);
1851 goto leave;
1852 }
1853
1854 /* load all node-local system inodes */
1855 status = ocfs2_init_local_system_inodes(osb);
1856 if (status < 0) {
1857 mlog_errno(status);
1858 goto leave;
1859 }
1860
1861 status = ocfs2_check_volume(osb);
1862 if (status < 0) {
1863 mlog_errno(status);
1864 goto leave;
1865 }
1866
1867 status = ocfs2_truncate_log_init(osb);
1868 if (status < 0)
1869 mlog_errno(status);
1870
1871 leave:
1872 if (unlock_super)
1873 ocfs2_super_unlock(osb, 1);
1874
1875 mlog_exit(status);
1876 return status;
1877 }
1878
1879 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1880 {
1881 int tmp, hangup_needed = 0;
1882 struct ocfs2_super *osb = NULL;
1883 char nodestr[8];
1884
1885 mlog_entry("(0x%p)\n", sb);
1886
1887 BUG_ON(!sb);
1888 osb = OCFS2_SB(sb);
1889 BUG_ON(!osb);
1890
1891 debugfs_remove(osb->osb_ctxt);
1892
1893 /*
1894 * Flush inode dropping work queue so that deletes are
1895 * performed while the filesystem is still working
1896 */
1897 ocfs2_drop_all_dl_inodes(osb);
1898
1899 /* Orphan scan should be stopped as early as possible */
1900 ocfs2_orphan_scan_stop(osb);
1901
1902 ocfs2_disable_quotas(osb);
1903
1904 ocfs2_shutdown_local_alloc(osb);
1905
1906 ocfs2_truncate_log_shutdown(osb);
1907
1908 /* This will disable recovery and flush any recovery work. */
1909 ocfs2_recovery_exit(osb);
1910
1911 ocfs2_journal_shutdown(osb);
1912
1913 ocfs2_sync_blockdev(sb);
1914
1915 ocfs2_purge_refcount_trees(osb);
1916
1917 /* No cluster connection means we've failed during mount, so skip
1918 * all the steps which depended on that to complete. */
1919 if (osb->cconn) {
1920 tmp = ocfs2_super_lock(osb, 1);
1921 if (tmp < 0) {
1922 mlog_errno(tmp);
1923 return;
1924 }
1925 }
1926
1927 if (osb->slot_num != OCFS2_INVALID_SLOT)
1928 ocfs2_put_slot(osb);
1929
1930 if (osb->cconn)
1931 ocfs2_super_unlock(osb, 1);
1932
1933 ocfs2_release_system_inodes(osb);
1934
1935 /*
1936 * If we're dismounting due to mount error, mount.ocfs2 will clean
1937 * up heartbeat. If we're a local mount, there is no heartbeat.
1938 * If we failed before we got a uuid_str yet, we can't stop
1939 * heartbeat. Otherwise, do it.
1940 */
1941 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1942 hangup_needed = 1;
1943
1944 if (osb->cconn)
1945 ocfs2_dlm_shutdown(osb, hangup_needed);
1946
1947 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1948 debugfs_remove(osb->osb_debug_root);
1949
1950 if (hangup_needed)
1951 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1952
1953 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1954
1955 if (ocfs2_mount_local(osb))
1956 snprintf(nodestr, sizeof(nodestr), "local");
1957 else
1958 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1959
1960 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1961 osb->dev_str, nodestr);
1962
1963 ocfs2_delete_osb(osb);
1964 kfree(osb);
1965 sb->s_dev = 0;
1966 sb->s_fs_info = NULL;
1967 }
1968
1969 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1970 unsigned uuid_bytes)
1971 {
1972 int i, ret;
1973 char *ptr;
1974
1975 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1976
1977 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1978 if (osb->uuid_str == NULL)
1979 return -ENOMEM;
1980
1981 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1982 /* print with null */
1983 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1984 if (ret != 2) /* drop super cleans up */
1985 return -EINVAL;
1986 /* then only advance past the last char */
1987 ptr += 2;
1988 }
1989
1990 return 0;
1991 }
1992
1993 static int ocfs2_initialize_super(struct super_block *sb,
1994 struct buffer_head *bh,
1995 int sector_size,
1996 struct ocfs2_blockcheck_stats *stats)
1997 {
1998 int status;
1999 int i, cbits, bbits;
2000 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2001 struct inode *inode = NULL;
2002 struct ocfs2_journal *journal;
2003 __le32 uuid_net_key;
2004 struct ocfs2_super *osb;
2005
2006 mlog_entry_void();
2007
2008 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2009 if (!osb) {
2010 status = -ENOMEM;
2011 mlog_errno(status);
2012 goto bail;
2013 }
2014
2015 sb->s_fs_info = osb;
2016 sb->s_op = &ocfs2_sops;
2017 sb->s_export_op = &ocfs2_export_ops;
2018 sb->s_qcop = &ocfs2_quotactl_ops;
2019 sb->dq_op = &ocfs2_quota_operations;
2020 sb->s_xattr = ocfs2_xattr_handlers;
2021 sb->s_time_gran = 1;
2022 sb->s_flags |= MS_NOATIME;
2023 /* this is needed to support O_LARGEFILE */
2024 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2025 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2026 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2027
2028 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2029
2030 for (i = 0; i < 3; i++)
2031 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2032 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2033
2034 osb->sb = sb;
2035 /* Save off for ocfs2_rw_direct */
2036 osb->s_sectsize_bits = blksize_bits(sector_size);
2037 BUG_ON(!osb->s_sectsize_bits);
2038
2039 spin_lock_init(&osb->dc_task_lock);
2040 init_waitqueue_head(&osb->dc_event);
2041 osb->dc_work_sequence = 0;
2042 osb->dc_wake_sequence = 0;
2043 INIT_LIST_HEAD(&osb->blocked_lock_list);
2044 osb->blocked_lock_count = 0;
2045 spin_lock_init(&osb->osb_lock);
2046 spin_lock_init(&osb->osb_xattr_lock);
2047 ocfs2_init_steal_slots(osb);
2048
2049 atomic_set(&osb->alloc_stats.moves, 0);
2050 atomic_set(&osb->alloc_stats.local_data, 0);
2051 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2052 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2053 atomic_set(&osb->alloc_stats.bg_extends, 0);
2054
2055 /* Copy the blockcheck stats from the superblock probe */
2056 osb->osb_ecc_stats = *stats;
2057
2058 ocfs2_init_node_maps(osb);
2059
2060 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2061 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2062
2063 ocfs2_orphan_scan_init(osb);
2064
2065 status = ocfs2_recovery_init(osb);
2066 if (status) {
2067 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2068 mlog_errno(status);
2069 goto bail;
2070 }
2071
2072 init_waitqueue_head(&osb->checkpoint_event);
2073 atomic_set(&osb->needs_checkpoint, 0);
2074
2075 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2076
2077 osb->slot_num = OCFS2_INVALID_SLOT;
2078
2079 osb->s_xattr_inline_size = le16_to_cpu(
2080 di->id2.i_super.s_xattr_inline_size);
2081
2082 osb->local_alloc_state = OCFS2_LA_UNUSED;
2083 osb->local_alloc_bh = NULL;
2084 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2085
2086 init_waitqueue_head(&osb->osb_mount_event);
2087
2088 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2089 if (status) {
2090 mlog_errno(status);
2091 goto bail;
2092 }
2093
2094 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2095 if (!osb->vol_label) {
2096 mlog(ML_ERROR, "unable to alloc vol label\n");
2097 status = -ENOMEM;
2098 goto bail;
2099 }
2100
2101 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2102 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2103 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2104 osb->max_slots);
2105 status = -EINVAL;
2106 goto bail;
2107 }
2108 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2109
2110 osb->slot_recovery_generations =
2111 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2112 GFP_KERNEL);
2113 if (!osb->slot_recovery_generations) {
2114 status = -ENOMEM;
2115 mlog_errno(status);
2116 goto bail;
2117 }
2118
2119 init_waitqueue_head(&osb->osb_wipe_event);
2120 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2121 sizeof(*osb->osb_orphan_wipes),
2122 GFP_KERNEL);
2123 if (!osb->osb_orphan_wipes) {
2124 status = -ENOMEM;
2125 mlog_errno(status);
2126 goto bail;
2127 }
2128
2129 osb->osb_rf_lock_tree = RB_ROOT;
2130
2131 osb->s_feature_compat =
2132 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2133 osb->s_feature_ro_compat =
2134 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2135 osb->s_feature_incompat =
2136 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2137
2138 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2139 mlog(ML_ERROR, "couldn't mount because of unsupported "
2140 "optional features (%x).\n", i);
2141 status = -EINVAL;
2142 goto bail;
2143 }
2144 if (!(osb->sb->s_flags & MS_RDONLY) &&
2145 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2146 mlog(ML_ERROR, "couldn't mount RDWR because of "
2147 "unsupported optional features (%x).\n", i);
2148 status = -EINVAL;
2149 goto bail;
2150 }
2151
2152 if (ocfs2_userspace_stack(osb)) {
2153 memcpy(osb->osb_cluster_stack,
2154 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2155 OCFS2_STACK_LABEL_LEN);
2156 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2157 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2158 mlog(ML_ERROR,
2159 "couldn't mount because of an invalid "
2160 "cluster stack label (%s) \n",
2161 osb->osb_cluster_stack);
2162 status = -EINVAL;
2163 goto bail;
2164 }
2165 } else {
2166 /* The empty string is identical with classic tools that
2167 * don't know about s_cluster_info. */
2168 osb->osb_cluster_stack[0] = '\0';
2169 }
2170
2171 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2172
2173 /* FIXME
2174 * This should be done in ocfs2_journal_init(), but unknown
2175 * ordering issues will cause the filesystem to crash.
2176 * If anyone wants to figure out what part of the code
2177 * refers to osb->journal before ocfs2_journal_init() is run,
2178 * be my guest.
2179 */
2180 /* initialize our journal structure */
2181
2182 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2183 if (!journal) {
2184 mlog(ML_ERROR, "unable to alloc journal\n");
2185 status = -ENOMEM;
2186 goto bail;
2187 }
2188 osb->journal = journal;
2189 journal->j_osb = osb;
2190
2191 atomic_set(&journal->j_num_trans, 0);
2192 init_rwsem(&journal->j_trans_barrier);
2193 init_waitqueue_head(&journal->j_checkpointed);
2194 spin_lock_init(&journal->j_lock);
2195 journal->j_trans_id = (unsigned long) 1;
2196 INIT_LIST_HEAD(&journal->j_la_cleanups);
2197 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2198 journal->j_state = OCFS2_JOURNAL_FREE;
2199
2200 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2201 osb->dentry_lock_list = NULL;
2202
2203 /* get some pseudo constants for clustersize bits */
2204 osb->s_clustersize_bits =
2205 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2206 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2207 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2208
2209 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2210 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2211 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2212 osb->s_clustersize);
2213 status = -EINVAL;
2214 goto bail;
2215 }
2216
2217 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
2218 > (u32)~0UL) {
2219 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
2220 "what jbd can address in 32 bits.\n");
2221 status = -EINVAL;
2222 goto bail;
2223 }
2224
2225 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2226 sizeof(di->id2.i_super.s_uuid))) {
2227 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2228 status = -ENOMEM;
2229 goto bail;
2230 }
2231
2232 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2233
2234 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2235 osb->vol_label[63] = '\0';
2236 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2237 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2238 osb->first_cluster_group_blkno =
2239 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2240 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2241 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2242 mlog(0, "vol_label: %s\n", osb->vol_label);
2243 mlog(0, "uuid: %s\n", osb->uuid_str);
2244 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2245 (unsigned long long)osb->root_blkno,
2246 (unsigned long long)osb->system_dir_blkno);
2247
2248 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2249 if (!osb->osb_dlm_debug) {
2250 status = -ENOMEM;
2251 mlog_errno(status);
2252 goto bail;
2253 }
2254
2255 atomic_set(&osb->vol_state, VOLUME_INIT);
2256
2257 /* load root, system_dir, and all global system inodes */
2258 status = ocfs2_init_global_system_inodes(osb);
2259 if (status < 0) {
2260 mlog_errno(status);
2261 goto bail;
2262 }
2263
2264 /*
2265 * global bitmap
2266 */
2267 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2268 OCFS2_INVALID_SLOT);
2269 if (!inode) {
2270 status = -EINVAL;
2271 mlog_errno(status);
2272 goto bail;
2273 }
2274
2275 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2276 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2277 iput(inode);
2278
2279 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2280 osb->s_feature_incompat) * 8;
2281
2282 status = ocfs2_init_slot_info(osb);
2283 if (status < 0) {
2284 mlog_errno(status);
2285 goto bail;
2286 }
2287
2288 bail:
2289 mlog_exit(status);
2290 return status;
2291 }
2292
2293 /*
2294 * will return: -EAGAIN if it is ok to keep searching for superblocks
2295 * -EINVAL if there is a bad superblock
2296 * 0 on success
2297 */
2298 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2299 struct buffer_head *bh,
2300 u32 blksz,
2301 struct ocfs2_blockcheck_stats *stats)
2302 {
2303 int status = -EAGAIN;
2304
2305 mlog_entry_void();
2306
2307 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2308 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2309 /* We have to do a raw check of the feature here */
2310 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2311 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2312 status = ocfs2_block_check_validate(bh->b_data,
2313 bh->b_size,
2314 &di->i_check,
2315 stats);
2316 if (status)
2317 goto out;
2318 }
2319 status = -EINVAL;
2320 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2321 mlog(ML_ERROR, "found superblock with incorrect block "
2322 "size: found %u, should be %u\n",
2323 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2324 blksz);
2325 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2326 OCFS2_MAJOR_REV_LEVEL ||
2327 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2328 OCFS2_MINOR_REV_LEVEL) {
2329 mlog(ML_ERROR, "found superblock with bad version: "
2330 "found %u.%u, should be %u.%u\n",
2331 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2332 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2333 OCFS2_MAJOR_REV_LEVEL,
2334 OCFS2_MINOR_REV_LEVEL);
2335 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2336 mlog(ML_ERROR, "bad block number on superblock: "
2337 "found %llu, should be %llu\n",
2338 (unsigned long long)le64_to_cpu(di->i_blkno),
2339 (unsigned long long)bh->b_blocknr);
2340 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2341 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2342 mlog(ML_ERROR, "bad cluster size found: %u\n",
2343 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2344 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2345 mlog(ML_ERROR, "bad root_blkno: 0\n");
2346 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2347 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2348 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2349 mlog(ML_ERROR,
2350 "Superblock slots found greater than file system "
2351 "maximum: found %u, max %u\n",
2352 le16_to_cpu(di->id2.i_super.s_max_slots),
2353 OCFS2_MAX_SLOTS);
2354 } else {
2355 /* found it! */
2356 status = 0;
2357 }
2358 }
2359
2360 out:
2361 mlog_exit(status);
2362 return status;
2363 }
2364
2365 static int ocfs2_check_volume(struct ocfs2_super *osb)
2366 {
2367 int status;
2368 int dirty;
2369 int local;
2370 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2371 * recover
2372 * ourselves. */
2373
2374 mlog_entry_void();
2375
2376 /* Init our journal object. */
2377 status = ocfs2_journal_init(osb->journal, &dirty);
2378 if (status < 0) {
2379 mlog(ML_ERROR, "Could not initialize journal!\n");
2380 goto finally;
2381 }
2382
2383 /* If the journal was unmounted cleanly then we don't want to
2384 * recover anything. Otherwise, journal_load will do that
2385 * dirty work for us :) */
2386 if (!dirty) {
2387 status = ocfs2_journal_wipe(osb->journal, 0);
2388 if (status < 0) {
2389 mlog_errno(status);
2390 goto finally;
2391 }
2392 } else {
2393 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2394 "recovering volume.\n");
2395 }
2396
2397 local = ocfs2_mount_local(osb);
2398
2399 /* will play back anything left in the journal. */
2400 status = ocfs2_journal_load(osb->journal, local, dirty);
2401 if (status < 0) {
2402 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2403 goto finally;
2404 }
2405
2406 if (dirty) {
2407 /* recover my local alloc if we didn't unmount cleanly. */
2408 status = ocfs2_begin_local_alloc_recovery(osb,
2409 osb->slot_num,
2410 &local_alloc);
2411 if (status < 0) {
2412 mlog_errno(status);
2413 goto finally;
2414 }
2415 /* we complete the recovery process after we've marked
2416 * ourselves as mounted. */
2417 }
2418
2419 mlog(0, "Journal loaded.\n");
2420
2421 status = ocfs2_load_local_alloc(osb);
2422 if (status < 0) {
2423 mlog_errno(status);
2424 goto finally;
2425 }
2426
2427 if (dirty) {
2428 /* Recovery will be completed after we've mounted the
2429 * rest of the volume. */
2430 osb->dirty = 1;
2431 osb->local_alloc_copy = local_alloc;
2432 local_alloc = NULL;
2433 }
2434
2435 /* go through each journal, trylock it and if you get the
2436 * lock, and it's marked as dirty, set the bit in the recover
2437 * map and launch a recovery thread for it. */
2438 status = ocfs2_mark_dead_nodes(osb);
2439 if (status < 0) {
2440 mlog_errno(status);
2441 goto finally;
2442 }
2443
2444 status = ocfs2_compute_replay_slots(osb);
2445 if (status < 0)
2446 mlog_errno(status);
2447
2448 finally:
2449 if (local_alloc)
2450 kfree(local_alloc);
2451
2452 mlog_exit(status);
2453 return status;
2454 }
2455
2456 /*
2457 * The routine gets called from dismount or close whenever a dismount on
2458 * volume is requested and the osb open count becomes 1.
2459 * It will remove the osb from the global list and also free up all the
2460 * initialized resources and fileobject.
2461 */
2462 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2463 {
2464 mlog_entry_void();
2465
2466 /* This function assumes that the caller has the main osb resource */
2467
2468 ocfs2_free_slot_info(osb);
2469
2470 kfree(osb->osb_orphan_wipes);
2471 kfree(osb->slot_recovery_generations);
2472 /* FIXME
2473 * This belongs in journal shutdown, but because we have to
2474 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2475 * we free it here.
2476 */
2477 kfree(osb->journal);
2478 if (osb->local_alloc_copy)
2479 kfree(osb->local_alloc_copy);
2480 kfree(osb->uuid_str);
2481 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2482 memset(osb, 0, sizeof(struct ocfs2_super));
2483
2484 mlog_exit_void();
2485 }
2486
2487 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2488 * panic(). We do not support continue-on-error operation. */
2489 static void ocfs2_handle_error(struct super_block *sb)
2490 {
2491 struct ocfs2_super *osb = OCFS2_SB(sb);
2492
2493 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2494 panic("OCFS2: (device %s): panic forced after error\n",
2495 sb->s_id);
2496
2497 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2498
2499 if (sb->s_flags & MS_RDONLY &&
2500 (ocfs2_is_soft_readonly(osb) ||
2501 ocfs2_is_hard_readonly(osb)))
2502 return;
2503
2504 printk(KERN_CRIT "File system is now read-only due to the potential "
2505 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2506 "system is unmounted.\n");
2507 sb->s_flags |= MS_RDONLY;
2508 ocfs2_set_ro_flag(osb, 0);
2509 }
2510
2511 static char error_buf[1024];
2512
2513 void __ocfs2_error(struct super_block *sb,
2514 const char *function,
2515 const char *fmt, ...)
2516 {
2517 va_list args;
2518
2519 va_start(args, fmt);
2520 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2521 va_end(args);
2522
2523 /* Not using mlog here because we want to show the actual
2524 * function the error came from. */
2525 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2526 sb->s_id, function, error_buf);
2527
2528 ocfs2_handle_error(sb);
2529 }
2530
2531 /* Handle critical errors. This is intentionally more drastic than
2532 * ocfs2_handle_error, so we only use for things like journal errors,
2533 * etc. */
2534 void __ocfs2_abort(struct super_block* sb,
2535 const char *function,
2536 const char *fmt, ...)
2537 {
2538 va_list args;
2539
2540 va_start(args, fmt);
2541 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2542 va_end(args);
2543
2544 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2545 sb->s_id, function, error_buf);
2546
2547 /* We don't have the cluster support yet to go straight to
2548 * hard readonly in here. Until then, we want to keep
2549 * ocfs2_abort() so that we can at least mark critical
2550 * errors.
2551 *
2552 * TODO: This should abort the journal and alert other nodes
2553 * that our slot needs recovery. */
2554
2555 /* Force a panic(). This stinks, but it's better than letting
2556 * things continue without having a proper hard readonly
2557 * here. */
2558 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2559 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2560 ocfs2_handle_error(sb);
2561 }
2562
2563 /*
2564 * Void signal blockers, because in-kernel sigprocmask() only fails
2565 * when SIG_* is wrong.
2566 */
2567 void ocfs2_block_signals(sigset_t *oldset)
2568 {
2569 int rc;
2570 sigset_t blocked;
2571
2572 sigfillset(&blocked);
2573 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2574 BUG_ON(rc);
2575 }
2576
2577 void ocfs2_unblock_signals(sigset_t *oldset)
2578 {
2579 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2580 BUG_ON(rc);
2581 }
2582
2583 module_init(ocfs2_init);
2584 module_exit(ocfs2_exit);
CJK support for tty framebuffer vt