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Linux 2.6.35-rc1
[orion.git] / fs / ocfs2 / super.c
blob0eaa929a4dbf2cec50d059affc8c664bf9a1f1d2
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 .clear_inode = ocfs2_clear_inode,
149 .delete_inode = ocfs2_delete_inode,
150 .sync_fs = ocfs2_sync_fs,
151 .put_super = ocfs2_put_super,
152 .remount_fs = ocfs2_remount,
153 .show_options = ocfs2_show_options,
154 .quota_read = ocfs2_quota_read,
155 .quota_write = ocfs2_quota_write,
156 };
157
158 enum {
159 Opt_barrier,
160 Opt_err_panic,
161 Opt_err_ro,
162 Opt_intr,
163 Opt_nointr,
164 Opt_hb_none,
165 Opt_hb_local,
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_resv_level,
182 Opt_dir_resv_level,
183 Opt_err,
184 };
185
186 static const match_table_t tokens = {
187 {Opt_barrier, "barrier=%u"},
188 {Opt_err_panic, "errors=panic"},
189 {Opt_err_ro, "errors=remount-ro"},
190 {Opt_intr, "intr"},
191 {Opt_nointr, "nointr"},
192 {Opt_hb_none, OCFS2_HB_NONE},
193 {Opt_hb_local, OCFS2_HB_LOCAL},
194 {Opt_data_ordered, "data=ordered"},
195 {Opt_data_writeback, "data=writeback"},
196 {Opt_atime_quantum, "atime_quantum=%u"},
197 {Opt_slot, "preferred_slot=%u"},
198 {Opt_commit, "commit=%u"},
199 {Opt_localalloc, "localalloc=%d"},
200 {Opt_localflocks, "localflocks"},
201 {Opt_stack, "cluster_stack=%s"},
202 {Opt_user_xattr, "user_xattr"},
203 {Opt_nouser_xattr, "nouser_xattr"},
204 {Opt_inode64, "inode64"},
205 {Opt_acl, "acl"},
206 {Opt_noacl, "noacl"},
207 {Opt_usrquota, "usrquota"},
208 {Opt_grpquota, "grpquota"},
209 {Opt_resv_level, "resv_level=%u"},
210 {Opt_dir_resv_level, "dir_resv_level=%u"},
211 {Opt_err, NULL}
212 };
213
214 #ifdef CONFIG_DEBUG_FS
215 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
216 {
217 struct ocfs2_cluster_connection *cconn = osb->cconn;
218 struct ocfs2_recovery_map *rm = osb->recovery_map;
219 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
220 int i, out = 0;
221
222 out += snprintf(buf + out, len - out,
223 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
224 "Device", osb->dev_str, osb->uuid_str,
225 osb->fs_generation, osb->vol_label);
226
227 out += snprintf(buf + out, len - out,
228 "%10s => State: %d Flags: 0x%lX\n", "Volume",
229 atomic_read(&osb->vol_state), osb->osb_flags);
230
231 out += snprintf(buf + out, len - out,
232 "%10s => Block: %lu Cluster: %d\n", "Sizes",
233 osb->sb->s_blocksize, osb->s_clustersize);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => Compat: 0x%X Incompat: 0x%X "
237 "ROcompat: 0x%X\n",
238 "Features", osb->s_feature_compat,
239 osb->s_feature_incompat, osb->s_feature_ro_compat);
240
241 out += snprintf(buf + out, len - out,
242 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
243 osb->s_mount_opt, osb->s_atime_quantum);
244
245 if (cconn) {
246 out += snprintf(buf + out, len - out,
247 "%10s => Stack: %s Name: %*s "
248 "Version: %d.%d\n", "Cluster",
249 (*osb->osb_cluster_stack == '\0' ?
250 "o2cb" : osb->osb_cluster_stack),
251 cconn->cc_namelen, cconn->cc_name,
252 cconn->cc_version.pv_major,
253 cconn->cc_version.pv_minor);
254 }
255
256 spin_lock(&osb->dc_task_lock);
257 out += snprintf(buf + out, len - out,
258 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
259 "WorkSeq: %lu\n", "DownCnvt",
260 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
261 osb->blocked_lock_count, osb->dc_wake_sequence,
262 osb->dc_work_sequence);
263 spin_unlock(&osb->dc_task_lock);
264
265 spin_lock(&osb->osb_lock);
266 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
267 "Recovery",
268 (osb->recovery_thread_task ?
269 task_pid_nr(osb->recovery_thread_task) : -1));
270 if (rm->rm_used == 0)
271 out += snprintf(buf + out, len - out, " None\n");
272 else {
273 for (i = 0; i < rm->rm_used; i++)
274 out += snprintf(buf + out, len - out, " %d",
275 rm->rm_entries[i]);
276 out += snprintf(buf + out, len - out, "\n");
277 }
278 spin_unlock(&osb->osb_lock);
279
280 out += snprintf(buf + out, len - out,
281 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
282 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
283 osb->osb_commit_interval,
284 atomic_read(&osb->needs_checkpoint));
285
286 out += snprintf(buf + out, len - out,
287 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
288 "Journal", osb->journal->j_state,
289 osb->journal->j_trans_id,
290 atomic_read(&osb->journal->j_num_trans));
291
292 out += snprintf(buf + out, len - out,
293 "%10s => GlobalAllocs: %d LocalAllocs: %d "
294 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
295 "Stats",
296 atomic_read(&osb->alloc_stats.bitmap_data),
297 atomic_read(&osb->alloc_stats.local_data),
298 atomic_read(&osb->alloc_stats.bg_allocs),
299 atomic_read(&osb->alloc_stats.moves),
300 atomic_read(&osb->alloc_stats.bg_extends));
301
302 out += snprintf(buf + out, len - out,
303 "%10s => State: %u Descriptor: %llu Size: %u bits "
304 "Default: %u bits\n",
305 "LocalAlloc", osb->local_alloc_state,
306 (unsigned long long)osb->la_last_gd,
307 osb->local_alloc_bits, osb->local_alloc_default_bits);
308
309 spin_lock(&osb->osb_lock);
310 out += snprintf(buf + out, len - out,
311 "%10s => InodeSlot: %d StolenInodes: %d, "
312 "MetaSlot: %d StolenMeta: %d\n", "Steal",
313 osb->s_inode_steal_slot,
314 atomic_read(&osb->s_num_inodes_stolen),
315 osb->s_meta_steal_slot,
316 atomic_read(&osb->s_num_meta_stolen));
317 spin_unlock(&osb->osb_lock);
318
319 out += snprintf(buf + out, len - out, "OrphanScan => ");
320 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
321 os->os_count, os->os_seqno);
322 out += snprintf(buf + out, len - out, " Last Scan: ");
323 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
324 out += snprintf(buf + out, len - out, "Disabled\n");
325 else
326 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
327 (get_seconds() - os->os_scantime.tv_sec));
328
329 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
330 "Slots", "Num", "RecoGen");
331 for (i = 0; i < osb->max_slots; ++i) {
332 out += snprintf(buf + out, len - out,
333 "%10s %c %3d %10d\n",
334 " ",
335 (i == osb->slot_num ? '*' : ' '),
336 i, osb->slot_recovery_generations[i]);
337 }
338
339 return out;
340 }
341
342 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
343 {
344 struct ocfs2_super *osb = inode->i_private;
345 char *buf = NULL;
346
347 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
348 if (!buf)
349 goto bail;
350
351 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
352
353 file->private_data = buf;
354
355 return 0;
356 bail:
357 return -ENOMEM;
358 }
359
360 static int ocfs2_debug_release(struct inode *inode, struct file *file)
361 {
362 kfree(file->private_data);
363 return 0;
364 }
365
366 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
367 size_t nbytes, loff_t *ppos)
368 {
369 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
370 i_size_read(file->f_mapping->host));
371 }
372 #else
373 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
374 {
375 return 0;
376 }
377 static int ocfs2_debug_release(struct inode *inode, struct file *file)
378 {
379 return 0;
380 }
381 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
382 size_t nbytes, loff_t *ppos)
383 {
384 return 0;
385 }
386 #endif /* CONFIG_DEBUG_FS */
387
388 static const struct file_operations ocfs2_osb_debug_fops = {
389 .open = ocfs2_osb_debug_open,
390 .release = ocfs2_debug_release,
391 .read = ocfs2_debug_read,
392 .llseek = generic_file_llseek,
393 };
394
395 static int ocfs2_sync_fs(struct super_block *sb, int wait)
396 {
397 int status;
398 tid_t target;
399 struct ocfs2_super *osb = OCFS2_SB(sb);
400
401 if (ocfs2_is_hard_readonly(osb))
402 return -EROFS;
403
404 if (wait) {
405 status = ocfs2_flush_truncate_log(osb);
406 if (status < 0)
407 mlog_errno(status);
408 } else {
409 ocfs2_schedule_truncate_log_flush(osb, 0);
410 }
411
412 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
413 &target)) {
414 if (wait)
415 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
416 target);
417 }
418 return 0;
419 }
420
421 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
422 {
423 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
424 && (ino == USER_QUOTA_SYSTEM_INODE
425 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
426 return 0;
427 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
428 && (ino == GROUP_QUOTA_SYSTEM_INODE
429 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
430 return 0;
431 return 1;
432 }
433
434 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
435 {
436 struct inode *new = NULL;
437 int status = 0;
438 int i;
439
440 mlog_entry_void();
441
442 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
443 if (IS_ERR(new)) {
444 status = PTR_ERR(new);
445 mlog_errno(status);
446 goto bail;
447 }
448 osb->root_inode = new;
449
450 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
451 if (IS_ERR(new)) {
452 status = PTR_ERR(new);
453 mlog_errno(status);
454 goto bail;
455 }
456 osb->sys_root_inode = new;
457
458 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
459 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
460 if (!ocfs2_need_system_inode(osb, i))
461 continue;
462 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
463 if (!new) {
464 ocfs2_release_system_inodes(osb);
465 status = -EINVAL;
466 mlog_errno(status);
467 /* FIXME: Should ERROR_RO_FS */
468 mlog(ML_ERROR, "Unable to load system inode %d, "
469 "possibly corrupt fs?", i);
470 goto bail;
471 }
472 // the array now has one ref, so drop this one
473 iput(new);
474 }
475
476 bail:
477 mlog_exit(status);
478 return status;
479 }
480
481 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
482 {
483 struct inode *new = NULL;
484 int status = 0;
485 int i;
486
487 mlog_entry_void();
488
489 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
490 i < NUM_SYSTEM_INODES;
491 i++) {
492 if (!ocfs2_need_system_inode(osb, i))
493 continue;
494 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
495 if (!new) {
496 ocfs2_release_system_inodes(osb);
497 status = -EINVAL;
498 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
499 status, i, osb->slot_num);
500 goto bail;
501 }
502 /* the array now has one ref, so drop this one */
503 iput(new);
504 }
505
506 bail:
507 mlog_exit(status);
508 return status;
509 }
510
511 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
512 {
513 int i;
514 struct inode *inode;
515
516 mlog_entry_void();
517
518 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
519 inode = osb->system_inodes[i];
520 if (inode) {
521 iput(inode);
522 osb->system_inodes[i] = NULL;
523 }
524 }
525
526 inode = osb->sys_root_inode;
527 if (inode) {
528 iput(inode);
529 osb->sys_root_inode = NULL;
530 }
531
532 inode = osb->root_inode;
533 if (inode) {
534 iput(inode);
535 osb->root_inode = NULL;
536 }
537
538 mlog_exit(0);
539 }
540
541 /* We're allocating fs objects, use GFP_NOFS */
542 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
543 {
544 struct ocfs2_inode_info *oi;
545
546 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
547 if (!oi)
548 return NULL;
549
550 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
551 return &oi->vfs_inode;
552 }
553
554 static void ocfs2_destroy_inode(struct inode *inode)
555 {
556 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
557 }
558
559 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
560 unsigned int cbits)
561 {
562 unsigned int bytes = 1 << cbits;
563 unsigned int trim = bytes;
564 unsigned int bitshift = 32;
565
566 /*
567 * i_size and all block offsets in ocfs2 are always 64 bits
568 * wide. i_clusters is 32 bits, in cluster-sized units. So on
569 * 64 bit platforms, cluster size will be the limiting factor.
570 */
571
572 #if BITS_PER_LONG == 32
573 # if defined(CONFIG_LBDAF)
574 BUILD_BUG_ON(sizeof(sector_t) != 8);
575 /*
576 * We might be limited by page cache size.
577 */
578 if (bytes > PAGE_CACHE_SIZE) {
579 bytes = PAGE_CACHE_SIZE;
580 trim = 1;
581 /*
582 * Shift by 31 here so that we don't get larger than
583 * MAX_LFS_FILESIZE
584 */
585 bitshift = 31;
586 }
587 # else
588 /*
589 * We are limited by the size of sector_t. Use block size, as
590 * that's what we expose to the VFS.
591 */
592 bytes = 1 << bbits;
593 trim = 1;
594 bitshift = 31;
595 # endif
596 #endif
597
598 /*
599 * Trim by a whole cluster when we can actually approach the
600 * on-disk limits. Otherwise we can overflow i_clusters when
601 * an extent start is at the max offset.
602 */
603 return (((unsigned long long)bytes) << bitshift) - trim;
604 }
605
606 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
607 {
608 int incompat_features;
609 int ret = 0;
610 struct mount_options parsed_options;
611 struct ocfs2_super *osb = OCFS2_SB(sb);
612
613 lock_kernel();
614
615 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
616 !ocfs2_check_set_options(sb, &parsed_options)) {
617 ret = -EINVAL;
618 goto out;
619 }
620
621 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
622 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
623 ret = -EINVAL;
624 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
625 goto out;
626 }
627
628 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
629 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
630 ret = -EINVAL;
631 mlog(ML_ERROR, "Cannot change data mode on remount\n");
632 goto out;
633 }
634
635 /* Probably don't want this on remount; it might
636 * mess with other nodes */
637 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
638 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
639 ret = -EINVAL;
640 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
641 goto out;
642 }
643
644 /* We're going to/from readonly mode. */
645 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
646 /* Disable quota accounting before remounting RO */
647 if (*flags & MS_RDONLY) {
648 ret = ocfs2_susp_quotas(osb, 0);
649 if (ret < 0)
650 goto out;
651 }
652 /* Lock here so the check of HARD_RO and the potential
653 * setting of SOFT_RO is atomic. */
654 spin_lock(&osb->osb_lock);
655 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
656 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
657 ret = -EROFS;
658 goto unlock_osb;
659 }
660
661 if (*flags & MS_RDONLY) {
662 mlog(0, "Going to ro mode.\n");
663 sb->s_flags |= MS_RDONLY;
664 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
665 } else {
666 mlog(0, "Making ro filesystem writeable.\n");
667
668 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
669 mlog(ML_ERROR, "Cannot remount RDWR "
670 "filesystem due to previous errors.\n");
671 ret = -EROFS;
672 goto unlock_osb;
673 }
674 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
675 if (incompat_features) {
676 mlog(ML_ERROR, "Cannot remount RDWR because "
677 "of unsupported optional features "
678 "(%x).\n", incompat_features);
679 ret = -EINVAL;
680 goto unlock_osb;
681 }
682 sb->s_flags &= ~MS_RDONLY;
683 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
684 }
685 unlock_osb:
686 spin_unlock(&osb->osb_lock);
687 /* Enable quota accounting after remounting RW */
688 if (!ret && !(*flags & MS_RDONLY)) {
689 if (sb_any_quota_suspended(sb))
690 ret = ocfs2_susp_quotas(osb, 1);
691 else
692 ret = ocfs2_enable_quotas(osb);
693 if (ret < 0) {
694 /* Return back changes... */
695 spin_lock(&osb->osb_lock);
696 sb->s_flags |= MS_RDONLY;
697 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
698 spin_unlock(&osb->osb_lock);
699 goto out;
700 }
701 }
702 }
703
704 if (!ret) {
705 /* Only save off the new mount options in case of a successful
706 * remount. */
707 osb->s_mount_opt = parsed_options.mount_opt;
708 osb->s_atime_quantum = parsed_options.atime_quantum;
709 osb->preferred_slot = parsed_options.slot;
710 if (parsed_options.commit_interval)
711 osb->osb_commit_interval = parsed_options.commit_interval;
712
713 if (!ocfs2_is_hard_readonly(osb))
714 ocfs2_set_journal_params(osb);
715
716 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
717 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
718 MS_POSIXACL : 0);
719 }
720 out:
721 unlock_kernel();
722 return ret;
723 }
724
725 static int ocfs2_sb_probe(struct super_block *sb,
726 struct buffer_head **bh,
727 int *sector_size,
728 struct ocfs2_blockcheck_stats *stats)
729 {
730 int status, tmpstat;
731 struct ocfs1_vol_disk_hdr *hdr;
732 struct ocfs2_dinode *di;
733 int blksize;
734
735 *bh = NULL;
736
737 /* may be > 512 */
738 *sector_size = bdev_logical_block_size(sb->s_bdev);
739 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
740 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
741 *sector_size, OCFS2_MAX_BLOCKSIZE);
742 status = -EINVAL;
743 goto bail;
744 }
745
746 /* Can this really happen? */
747 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
748 *sector_size = OCFS2_MIN_BLOCKSIZE;
749
750 /* check block zero for old format */
751 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
752 if (status < 0) {
753 mlog_errno(status);
754 goto bail;
755 }
756 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
757 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
758 mlog(ML_ERROR, "incompatible version: %u.%u\n",
759 hdr->major_version, hdr->minor_version);
760 status = -EINVAL;
761 }
762 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
763 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
764 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
765 hdr->signature);
766 status = -EINVAL;
767 }
768 brelse(*bh);
769 *bh = NULL;
770 if (status < 0) {
771 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
772 "upgraded before mounting with ocfs v2\n");
773 goto bail;
774 }
775
776 /*
777 * Now check at magic offset for 512, 1024, 2048, 4096
778 * blocksizes. 4096 is the maximum blocksize because it is
779 * the minimum clustersize.
780 */
781 status = -EINVAL;
782 for (blksize = *sector_size;
783 blksize <= OCFS2_MAX_BLOCKSIZE;
784 blksize <<= 1) {
785 tmpstat = ocfs2_get_sector(sb, bh,
786 OCFS2_SUPER_BLOCK_BLKNO,
787 blksize);
788 if (tmpstat < 0) {
789 status = tmpstat;
790 mlog_errno(status);
791 break;
792 }
793 di = (struct ocfs2_dinode *) (*bh)->b_data;
794 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
795 spin_lock_init(&stats->b_lock);
796 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
797 if (tmpstat < 0) {
798 brelse(*bh);
799 *bh = NULL;
800 }
801 if (tmpstat != -EAGAIN) {
802 status = tmpstat;
803 break;
804 }
805 }
806
807 bail:
808 return status;
809 }
810
811 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
812 {
813 if (ocfs2_mount_local(osb)) {
814 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
815 mlog(ML_ERROR, "Cannot heartbeat on a locally "
816 "mounted device.\n");
817 return -EINVAL;
818 }
819 }
820
821 if (ocfs2_userspace_stack(osb)) {
822 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
823 mlog(ML_ERROR, "Userspace stack expected, but "
824 "o2cb heartbeat arguments passed to mount\n");
825 return -EINVAL;
826 }
827 }
828
829 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
830 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
831 !ocfs2_userspace_stack(osb)) {
832 mlog(ML_ERROR, "Heartbeat has to be started to mount "
833 "a read-write clustered device.\n");
834 return -EINVAL;
835 }
836 }
837
838 return 0;
839 }
840
841 /*
842 * If we're using a userspace stack, mount should have passed
843 * a name that matches the disk. If not, mount should not
844 * have passed a stack.
845 */
846 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
847 struct mount_options *mopt)
848 {
849 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
850 mlog(ML_ERROR,
851 "cluster stack passed to mount, but this filesystem "
852 "does not support it\n");
853 return -EINVAL;
854 }
855
856 if (ocfs2_userspace_stack(osb) &&
857 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
858 OCFS2_STACK_LABEL_LEN)) {
859 mlog(ML_ERROR,
860 "cluster stack passed to mount (\"%s\") does not "
861 "match the filesystem (\"%s\")\n",
862 mopt->cluster_stack,
863 osb->osb_cluster_stack);
864 return -EINVAL;
865 }
866
867 return 0;
868 }
869
870 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
871 {
872 int type;
873 struct super_block *sb = osb->sb;
874 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
875 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
876 int status = 0;
877
878 for (type = 0; type < MAXQUOTAS; type++) {
879 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
880 continue;
881 if (unsuspend)
882 status = dquot_resume(sb, type);
883 else {
884 struct ocfs2_mem_dqinfo *oinfo;
885
886 /* Cancel periodic syncing before suspending */
887 oinfo = sb_dqinfo(sb, type)->dqi_priv;
888 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
889 status = dquot_suspend(sb, type);
890 }
891 if (status < 0)
892 break;
893 }
894 if (status < 0)
895 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
896 "remount (error = %d).\n", status);
897 return status;
898 }
899
900 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
901 {
902 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
903 struct super_block *sb = osb->sb;
904 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
905 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
906 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
907 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
908 int status;
909 int type;
910
911 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
912 for (type = 0; type < MAXQUOTAS; type++) {
913 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
914 continue;
915 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
916 osb->slot_num);
917 if (!inode[type]) {
918 status = -ENOENT;
919 goto out_quota_off;
920 }
921 status = dquot_enable(inode[type], type, QFMT_OCFS2,
922 DQUOT_USAGE_ENABLED);
923 if (status < 0)
924 goto out_quota_off;
925 }
926
927 for (type = 0; type < MAXQUOTAS; type++)
928 iput(inode[type]);
929 return 0;
930 out_quota_off:
931 ocfs2_disable_quotas(osb);
932 for (type = 0; type < MAXQUOTAS; type++)
933 iput(inode[type]);
934 mlog_errno(status);
935 return status;
936 }
937
938 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
939 {
940 int type;
941 struct inode *inode;
942 struct super_block *sb = osb->sb;
943 struct ocfs2_mem_dqinfo *oinfo;
944
945 /* We mostly ignore errors in this function because there's not much
946 * we can do when we see them */
947 for (type = 0; type < MAXQUOTAS; type++) {
948 if (!sb_has_quota_loaded(sb, type))
949 continue;
950 /* Cancel periodic syncing before we grab dqonoff_mutex */
951 oinfo = sb_dqinfo(sb, type)->dqi_priv;
952 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
953 inode = igrab(sb->s_dquot.files[type]);
954 /* Turn off quotas. This will remove all dquot structures from
955 * memory and so they will be automatically synced to global
956 * quota files */
957 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
958 DQUOT_LIMITS_ENABLED);
959 if (!inode)
960 continue;
961 iput(inode);
962 }
963 }
964
965 /* Handle quota on quotactl */
966 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
967 char *path)
968 {
969 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
970 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
971
972 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
973 return -EINVAL;
974
975 return dquot_enable(sb_dqopt(sb)->files[type], type,
976 format_id, DQUOT_LIMITS_ENABLED);
977 }
978
979 /* Handle quota off quotactl */
980 static int ocfs2_quota_off(struct super_block *sb, int type)
981 {
982 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
983 }
984
985 static const struct quotactl_ops ocfs2_quotactl_ops = {
986 .quota_on = ocfs2_quota_on,
987 .quota_off = ocfs2_quota_off,
988 .quota_sync = dquot_quota_sync,
989 .get_info = dquot_get_dqinfo,
990 .set_info = dquot_set_dqinfo,
991 .get_dqblk = dquot_get_dqblk,
992 .set_dqblk = dquot_set_dqblk,
993 };
994
995 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
996 {
997 struct dentry *root;
998 int status, sector_size;
999 struct mount_options parsed_options;
1000 struct inode *inode = NULL;
1001 struct ocfs2_super *osb = NULL;
1002 struct buffer_head *bh = NULL;
1003 char nodestr[8];
1004 struct ocfs2_blockcheck_stats stats;
1005
1006 mlog_entry("%p, %p, %i", sb, data, silent);
1007
1008 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1009 status = -EINVAL;
1010 goto read_super_error;
1011 }
1012
1013 /* probe for superblock */
1014 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1015 if (status < 0) {
1016 mlog(ML_ERROR, "superblock probe failed!\n");
1017 goto read_super_error;
1018 }
1019
1020 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1021 osb = OCFS2_SB(sb);
1022 if (status < 0) {
1023 mlog_errno(status);
1024 goto read_super_error;
1025 }
1026 brelse(bh);
1027 bh = NULL;
1028
1029 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1030 status = -EINVAL;
1031 goto read_super_error;
1032 }
1033 osb->s_mount_opt = parsed_options.mount_opt;
1034 osb->s_atime_quantum = parsed_options.atime_quantum;
1035 osb->preferred_slot = parsed_options.slot;
1036 osb->osb_commit_interval = parsed_options.commit_interval;
1037
1038 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1039 osb->osb_resv_level = parsed_options.resv_level;
1040 osb->osb_dir_resv_level = parsed_options.resv_level;
1041 if (parsed_options.dir_resv_level == -1)
1042 osb->osb_dir_resv_level = parsed_options.resv_level;
1043 else
1044 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1045
1046 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1047 if (status)
1048 goto read_super_error;
1049
1050 sb->s_magic = OCFS2_SUPER_MAGIC;
1051
1052 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1053 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1054
1055 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1056 * heartbeat=none */
1057 if (bdev_read_only(sb->s_bdev)) {
1058 if (!(sb->s_flags & MS_RDONLY)) {
1059 status = -EACCES;
1060 mlog(ML_ERROR, "Readonly device detected but readonly "
1061 "mount was not specified.\n");
1062 goto read_super_error;
1063 }
1064
1065 /* You should not be able to start a local heartbeat
1066 * on a readonly device. */
1067 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1068 status = -EROFS;
1069 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1070 "device.\n");
1071 goto read_super_error;
1072 }
1073
1074 status = ocfs2_check_journals_nolocks(osb);
1075 if (status < 0) {
1076 if (status == -EROFS)
1077 mlog(ML_ERROR, "Recovery required on readonly "
1078 "file system, but write access is "
1079 "unavailable.\n");
1080 else
1081 mlog_errno(status);
1082 goto read_super_error;
1083 }
1084
1085 ocfs2_set_ro_flag(osb, 1);
1086
1087 printk(KERN_NOTICE "Readonly device detected. No cluster "
1088 "services will be utilized for this mount. Recovery "
1089 "will be skipped.\n");
1090 }
1091
1092 if (!ocfs2_is_hard_readonly(osb)) {
1093 if (sb->s_flags & MS_RDONLY)
1094 ocfs2_set_ro_flag(osb, 0);
1095 }
1096
1097 status = ocfs2_verify_heartbeat(osb);
1098 if (status < 0) {
1099 mlog_errno(status);
1100 goto read_super_error;
1101 }
1102
1103 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1104 ocfs2_debugfs_root);
1105 if (!osb->osb_debug_root) {
1106 status = -EINVAL;
1107 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1108 goto read_super_error;
1109 }
1110
1111 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1112 osb->osb_debug_root,
1113 osb,
1114 &ocfs2_osb_debug_fops);
1115 if (!osb->osb_ctxt) {
1116 status = -EINVAL;
1117 mlog_errno(status);
1118 goto read_super_error;
1119 }
1120
1121 if (ocfs2_meta_ecc(osb)) {
1122 status = ocfs2_blockcheck_stats_debugfs_install(
1123 &osb->osb_ecc_stats,
1124 osb->osb_debug_root);
1125 if (status) {
1126 mlog(ML_ERROR,
1127 "Unable to create blockcheck statistics "
1128 "files\n");
1129 goto read_super_error;
1130 }
1131 }
1132
1133 status = ocfs2_mount_volume(sb);
1134 if (osb->root_inode)
1135 inode = igrab(osb->root_inode);
1136
1137 if (status < 0)
1138 goto read_super_error;
1139
1140 if (!inode) {
1141 status = -EIO;
1142 mlog_errno(status);
1143 goto read_super_error;
1144 }
1145
1146 root = d_alloc_root(inode);
1147 if (!root) {
1148 status = -ENOMEM;
1149 mlog_errno(status);
1150 goto read_super_error;
1151 }
1152
1153 sb->s_root = root;
1154
1155 ocfs2_complete_mount_recovery(osb);
1156
1157 if (ocfs2_mount_local(osb))
1158 snprintf(nodestr, sizeof(nodestr), "local");
1159 else
1160 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1161
1162 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1163 "with %s data mode.\n",
1164 osb->dev_str, nodestr, osb->slot_num,
1165 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1166 "ordered");
1167
1168 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1169 wake_up(&osb->osb_mount_event);
1170
1171 /* Now we can initialize quotas because we can afford to wait
1172 * for cluster locks recovery now. That also means that truncation
1173 * log recovery can happen but that waits for proper quota setup */
1174 if (!(sb->s_flags & MS_RDONLY)) {
1175 status = ocfs2_enable_quotas(osb);
1176 if (status < 0) {
1177 /* We have to err-out specially here because
1178 * s_root is already set */
1179 mlog_errno(status);
1180 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1181 wake_up(&osb->osb_mount_event);
1182 mlog_exit(status);
1183 return status;
1184 }
1185 }
1186
1187 ocfs2_complete_quota_recovery(osb);
1188
1189 /* Now we wake up again for processes waiting for quotas */
1190 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1191 wake_up(&osb->osb_mount_event);
1192
1193 /* Start this when the mount is almost sure of being successful */
1194 ocfs2_orphan_scan_start(osb);
1195
1196 mlog_exit(status);
1197 return status;
1198
1199 read_super_error:
1200 brelse(bh);
1201
1202 if (inode)
1203 iput(inode);
1204
1205 if (osb) {
1206 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1207 wake_up(&osb->osb_mount_event);
1208 ocfs2_dismount_volume(sb, 1);
1209 }
1210
1211 mlog_exit(status);
1212 return status;
1213 }
1214
1215 static int ocfs2_get_sb(struct file_system_type *fs_type,
1216 int flags,
1217 const char *dev_name,
1218 void *data,
1219 struct vfsmount *mnt)
1220 {
1221 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1222 mnt);
1223 }
1224
1225 static void ocfs2_kill_sb(struct super_block *sb)
1226 {
1227 struct ocfs2_super *osb = OCFS2_SB(sb);
1228
1229 /* Failed mount? */
1230 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1231 goto out;
1232
1233 /* Prevent further queueing of inode drop events */
1234 spin_lock(&dentry_list_lock);
1235 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1236 spin_unlock(&dentry_list_lock);
1237 /* Wait for work to finish and/or remove it */
1238 cancel_work_sync(&osb->dentry_lock_work);
1239 out:
1240 kill_block_super(sb);
1241 }
1242
1243 static struct file_system_type ocfs2_fs_type = {
1244 .owner = THIS_MODULE,
1245 .name = "ocfs2",
1246 .get_sb = ocfs2_get_sb, /* is this called when we mount
1247 * the fs? */
1248 .kill_sb = ocfs2_kill_sb,
1249
1250 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1251 .next = NULL
1252 };
1253
1254 static int ocfs2_check_set_options(struct super_block *sb,
1255 struct mount_options *options)
1256 {
1257 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1258 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1259 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1260 mlog(ML_ERROR, "User quotas were requested, but this "
1261 "filesystem does not have the feature enabled.\n");
1262 return 0;
1263 }
1264 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1265 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1266 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1267 mlog(ML_ERROR, "Group quotas were requested, but this "
1268 "filesystem does not have the feature enabled.\n");
1269 return 0;
1270 }
1271 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1272 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1273 mlog(ML_ERROR, "ACL support requested but extended attributes "
1274 "feature is not enabled\n");
1275 return 0;
1276 }
1277 /* No ACL setting specified? Use XATTR feature... */
1278 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1279 OCFS2_MOUNT_NO_POSIX_ACL))) {
1280 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1281 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1282 else
1283 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1284 }
1285 return 1;
1286 }
1287
1288 static int ocfs2_parse_options(struct super_block *sb,
1289 char *options,
1290 struct mount_options *mopt,
1291 int is_remount)
1292 {
1293 int status;
1294 char *p;
1295
1296 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1297 options ? options : "(none)");
1298
1299 mopt->commit_interval = 0;
1300 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1301 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1302 mopt->slot = OCFS2_INVALID_SLOT;
1303 mopt->localalloc_opt = -1;
1304 mopt->cluster_stack[0] = '\0';
1305 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1306 mopt->dir_resv_level = -1;
1307
1308 if (!options) {
1309 status = 1;
1310 goto bail;
1311 }
1312
1313 while ((p = strsep(&options, ",")) != NULL) {
1314 int token, option;
1315 substring_t args[MAX_OPT_ARGS];
1316
1317 if (!*p)
1318 continue;
1319
1320 token = match_token(p, tokens, args);
1321 switch (token) {
1322 case Opt_hb_local:
1323 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1324 break;
1325 case Opt_hb_none:
1326 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
1327 break;
1328 case Opt_barrier:
1329 if (match_int(&args[0], &option)) {
1330 status = 0;
1331 goto bail;
1332 }
1333 if (option)
1334 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1335 else
1336 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1337 break;
1338 case Opt_intr:
1339 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1340 break;
1341 case Opt_nointr:
1342 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1343 break;
1344 case Opt_err_panic:
1345 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1346 break;
1347 case Opt_err_ro:
1348 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1349 break;
1350 case Opt_data_ordered:
1351 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1352 break;
1353 case Opt_data_writeback:
1354 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1355 break;
1356 case Opt_user_xattr:
1357 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1358 break;
1359 case Opt_nouser_xattr:
1360 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1361 break;
1362 case Opt_atime_quantum:
1363 if (match_int(&args[0], &option)) {
1364 status = 0;
1365 goto bail;
1366 }
1367 if (option >= 0)
1368 mopt->atime_quantum = option;
1369 break;
1370 case Opt_slot:
1371 option = 0;
1372 if (match_int(&args[0], &option)) {
1373 status = 0;
1374 goto bail;
1375 }
1376 if (option)
1377 mopt->slot = (s16)option;
1378 break;
1379 case Opt_commit:
1380 option = 0;
1381 if (match_int(&args[0], &option)) {
1382 status = 0;
1383 goto bail;
1384 }
1385 if (option < 0)
1386 return 0;
1387 if (option == 0)
1388 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1389 mopt->commit_interval = HZ * option;
1390 break;
1391 case Opt_localalloc:
1392 option = 0;
1393 if (match_int(&args[0], &option)) {
1394 status = 0;
1395 goto bail;
1396 }
1397 if (option >= 0)
1398 mopt->localalloc_opt = option;
1399 break;
1400 case Opt_localflocks:
1401 /*
1402 * Changing this during remount could race
1403 * flock() requests, or "unbalance" existing
1404 * ones (e.g., a lock is taken in one mode but
1405 * dropped in the other). If users care enough
1406 * to flip locking modes during remount, we
1407 * could add a "local" flag to individual
1408 * flock structures for proper tracking of
1409 * state.
1410 */
1411 if (!is_remount)
1412 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1413 break;
1414 case Opt_stack:
1415 /* Check both that the option we were passed
1416 * is of the right length and that it is a proper
1417 * string of the right length.
1418 */
1419 if (((args[0].to - args[0].from) !=
1420 OCFS2_STACK_LABEL_LEN) ||
1421 (strnlen(args[0].from,
1422 OCFS2_STACK_LABEL_LEN) !=
1423 OCFS2_STACK_LABEL_LEN)) {
1424 mlog(ML_ERROR,
1425 "Invalid cluster_stack option\n");
1426 status = 0;
1427 goto bail;
1428 }
1429 memcpy(mopt->cluster_stack, args[0].from,
1430 OCFS2_STACK_LABEL_LEN);
1431 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1432 break;
1433 case Opt_inode64:
1434 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1435 break;
1436 case Opt_usrquota:
1437 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1438 break;
1439 case Opt_grpquota:
1440 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1441 break;
1442 case Opt_acl:
1443 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1444 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1445 break;
1446 case Opt_noacl:
1447 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1448 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1449 break;
1450 case Opt_resv_level:
1451 if (is_remount)
1452 break;
1453 if (match_int(&args[0], &option)) {
1454 status = 0;
1455 goto bail;
1456 }
1457 if (option >= OCFS2_MIN_RESV_LEVEL &&
1458 option < OCFS2_MAX_RESV_LEVEL)
1459 mopt->resv_level = option;
1460 break;
1461 case Opt_dir_resv_level:
1462 if (is_remount)
1463 break;
1464 if (match_int(&args[0], &option)) {
1465 status = 0;
1466 goto bail;
1467 }
1468 if (option >= OCFS2_MIN_RESV_LEVEL &&
1469 option < OCFS2_MAX_RESV_LEVEL)
1470 mopt->dir_resv_level = option;
1471 break;
1472 default:
1473 mlog(ML_ERROR,
1474 "Unrecognized mount option \"%s\" "
1475 "or missing value\n", p);
1476 status = 0;
1477 goto bail;
1478 }
1479 }
1480
1481 status = 1;
1482
1483 bail:
1484 mlog_exit(status);
1485 return status;
1486 }
1487
1488 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1489 {
1490 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1491 unsigned long opts = osb->s_mount_opt;
1492 unsigned int local_alloc_megs;
1493
1494 if (opts & OCFS2_MOUNT_HB_LOCAL)
1495 seq_printf(s, ",_netdev,heartbeat=local");
1496 else
1497 seq_printf(s, ",heartbeat=none");
1498
1499 if (opts & OCFS2_MOUNT_NOINTR)
1500 seq_printf(s, ",nointr");
1501
1502 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1503 seq_printf(s, ",data=writeback");
1504 else
1505 seq_printf(s, ",data=ordered");
1506
1507 if (opts & OCFS2_MOUNT_BARRIER)
1508 seq_printf(s, ",barrier=1");
1509
1510 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1511 seq_printf(s, ",errors=panic");
1512 else
1513 seq_printf(s, ",errors=remount-ro");
1514
1515 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1516 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1517
1518 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1519 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1520
1521 if (osb->osb_commit_interval)
1522 seq_printf(s, ",commit=%u",
1523 (unsigned) (osb->osb_commit_interval / HZ));
1524
1525 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1526 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1527 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1528
1529 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1530 seq_printf(s, ",localflocks,");
1531
1532 if (osb->osb_cluster_stack[0])
1533 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1534 osb->osb_cluster_stack);
1535 if (opts & OCFS2_MOUNT_USRQUOTA)
1536 seq_printf(s, ",usrquota");
1537 if (opts & OCFS2_MOUNT_GRPQUOTA)
1538 seq_printf(s, ",grpquota");
1539
1540 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1541 seq_printf(s, ",nouser_xattr");
1542 else
1543 seq_printf(s, ",user_xattr");
1544
1545 if (opts & OCFS2_MOUNT_INODE64)
1546 seq_printf(s, ",inode64");
1547
1548 if (opts & OCFS2_MOUNT_POSIX_ACL)
1549 seq_printf(s, ",acl");
1550 else
1551 seq_printf(s, ",noacl");
1552
1553 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1554 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1555
1556 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1557 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1558
1559 return 0;
1560 }
1561
1562 static int __init ocfs2_init(void)
1563 {
1564 int status;
1565
1566 mlog_entry_void();
1567
1568 ocfs2_print_version();
1569
1570 status = init_ocfs2_uptodate_cache();
1571 if (status < 0) {
1572 mlog_errno(status);
1573 goto leave;
1574 }
1575
1576 status = ocfs2_initialize_mem_caches();
1577 if (status < 0) {
1578 mlog_errno(status);
1579 goto leave;
1580 }
1581
1582 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1583 if (!ocfs2_wq) {
1584 status = -ENOMEM;
1585 goto leave;
1586 }
1587
1588 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1589 if (!ocfs2_debugfs_root) {
1590 status = -EFAULT;
1591 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1592 }
1593
1594 status = ocfs2_quota_setup();
1595 if (status)
1596 goto leave;
1597
1598 ocfs2_set_locking_protocol();
1599
1600 status = register_quota_format(&ocfs2_quota_format);
1601 leave:
1602 if (status < 0) {
1603 ocfs2_quota_shutdown();
1604 ocfs2_free_mem_caches();
1605 exit_ocfs2_uptodate_cache();
1606 }
1607
1608 mlog_exit(status);
1609
1610 if (status >= 0) {
1611 return register_filesystem(&ocfs2_fs_type);
1612 } else
1613 return -1;
1614 }
1615
1616 static void __exit ocfs2_exit(void)
1617 {
1618 mlog_entry_void();
1619
1620 ocfs2_quota_shutdown();
1621
1622 if (ocfs2_wq) {
1623 flush_workqueue(ocfs2_wq);
1624 destroy_workqueue(ocfs2_wq);
1625 }
1626
1627 unregister_quota_format(&ocfs2_quota_format);
1628
1629 debugfs_remove(ocfs2_debugfs_root);
1630
1631 ocfs2_free_mem_caches();
1632
1633 unregister_filesystem(&ocfs2_fs_type);
1634
1635 exit_ocfs2_uptodate_cache();
1636
1637 mlog_exit_void();
1638 }
1639
1640 static void ocfs2_put_super(struct super_block *sb)
1641 {
1642 mlog_entry("(0x%p)\n", sb);
1643
1644 lock_kernel();
1645
1646 ocfs2_sync_blockdev(sb);
1647 ocfs2_dismount_volume(sb, 0);
1648
1649 unlock_kernel();
1650
1651 mlog_exit_void();
1652 }
1653
1654 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1655 {
1656 struct ocfs2_super *osb;
1657 u32 numbits, freebits;
1658 int status;
1659 struct ocfs2_dinode *bm_lock;
1660 struct buffer_head *bh = NULL;
1661 struct inode *inode = NULL;
1662
1663 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1664
1665 osb = OCFS2_SB(dentry->d_sb);
1666
1667 inode = ocfs2_get_system_file_inode(osb,
1668 GLOBAL_BITMAP_SYSTEM_INODE,
1669 OCFS2_INVALID_SLOT);
1670 if (!inode) {
1671 mlog(ML_ERROR, "failed to get bitmap inode\n");
1672 status = -EIO;
1673 goto bail;
1674 }
1675
1676 status = ocfs2_inode_lock(inode, &bh, 0);
1677 if (status < 0) {
1678 mlog_errno(status);
1679 goto bail;
1680 }
1681
1682 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1683
1684 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1685 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1686
1687 buf->f_type = OCFS2_SUPER_MAGIC;
1688 buf->f_bsize = dentry->d_sb->s_blocksize;
1689 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1690 buf->f_blocks = ((sector_t) numbits) *
1691 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1692 buf->f_bfree = ((sector_t) freebits) *
1693 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1694 buf->f_bavail = buf->f_bfree;
1695 buf->f_files = numbits;
1696 buf->f_ffree = freebits;
1697 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1698 & 0xFFFFFFFFUL;
1699 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1700 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1701
1702 brelse(bh);
1703
1704 ocfs2_inode_unlock(inode, 0);
1705 status = 0;
1706 bail:
1707 if (inode)
1708 iput(inode);
1709
1710 mlog_exit(status);
1711
1712 return status;
1713 }
1714
1715 static void ocfs2_inode_init_once(void *data)
1716 {
1717 struct ocfs2_inode_info *oi = data;
1718
1719 oi->ip_flags = 0;
1720 oi->ip_open_count = 0;
1721 spin_lock_init(&oi->ip_lock);
1722 ocfs2_extent_map_init(&oi->vfs_inode);
1723 INIT_LIST_HEAD(&oi->ip_io_markers);
1724 oi->ip_dir_start_lookup = 0;
1725
1726 init_rwsem(&oi->ip_alloc_sem);
1727 init_rwsem(&oi->ip_xattr_sem);
1728 mutex_init(&oi->ip_io_mutex);
1729
1730 oi->ip_blkno = 0ULL;
1731 oi->ip_clusters = 0;
1732
1733 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1734
1735 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1736 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1737 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1738
1739 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1740 &ocfs2_inode_caching_ops);
1741
1742 inode_init_once(&oi->vfs_inode);
1743 }
1744
1745 static int ocfs2_initialize_mem_caches(void)
1746 {
1747 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1748 sizeof(struct ocfs2_inode_info),
1749 0,
1750 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1751 SLAB_MEM_SPREAD),
1752 ocfs2_inode_init_once);
1753 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1754 sizeof(struct ocfs2_dquot),
1755 0,
1756 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1757 SLAB_MEM_SPREAD),
1758 NULL);
1759 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1760 sizeof(struct ocfs2_quota_chunk),
1761 0,
1762 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1763 NULL);
1764 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1765 !ocfs2_qf_chunk_cachep) {
1766 if (ocfs2_inode_cachep)
1767 kmem_cache_destroy(ocfs2_inode_cachep);
1768 if (ocfs2_dquot_cachep)
1769 kmem_cache_destroy(ocfs2_dquot_cachep);
1770 if (ocfs2_qf_chunk_cachep)
1771 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1772 return -ENOMEM;
1773 }
1774
1775 return 0;
1776 }
1777
1778 static void ocfs2_free_mem_caches(void)
1779 {
1780 if (ocfs2_inode_cachep)
1781 kmem_cache_destroy(ocfs2_inode_cachep);
1782 ocfs2_inode_cachep = NULL;
1783
1784 if (ocfs2_dquot_cachep)
1785 kmem_cache_destroy(ocfs2_dquot_cachep);
1786 ocfs2_dquot_cachep = NULL;
1787
1788 if (ocfs2_qf_chunk_cachep)
1789 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1790 ocfs2_qf_chunk_cachep = NULL;
1791 }
1792
1793 static int ocfs2_get_sector(struct super_block *sb,
1794 struct buffer_head **bh,
1795 int block,
1796 int sect_size)
1797 {
1798 if (!sb_set_blocksize(sb, sect_size)) {
1799 mlog(ML_ERROR, "unable to set blocksize\n");
1800 return -EIO;
1801 }
1802
1803 *bh = sb_getblk(sb, block);
1804 if (!*bh) {
1805 mlog_errno(-EIO);
1806 return -EIO;
1807 }
1808 lock_buffer(*bh);
1809 if (!buffer_dirty(*bh))
1810 clear_buffer_uptodate(*bh);
1811 unlock_buffer(*bh);
1812 ll_rw_block(READ, 1, bh);
1813 wait_on_buffer(*bh);
1814 if (!buffer_uptodate(*bh)) {
1815 mlog_errno(-EIO);
1816 brelse(*bh);
1817 *bh = NULL;
1818 return -EIO;
1819 }
1820
1821 return 0;
1822 }
1823
1824 static int ocfs2_mount_volume(struct super_block *sb)
1825 {
1826 int status = 0;
1827 int unlock_super = 0;
1828 struct ocfs2_super *osb = OCFS2_SB(sb);
1829
1830 mlog_entry_void();
1831
1832 if (ocfs2_is_hard_readonly(osb))
1833 goto leave;
1834
1835 status = ocfs2_dlm_init(osb);
1836 if (status < 0) {
1837 mlog_errno(status);
1838 goto leave;
1839 }
1840
1841 status = ocfs2_super_lock(osb, 1);
1842 if (status < 0) {
1843 mlog_errno(status);
1844 goto leave;
1845 }
1846 unlock_super = 1;
1847
1848 /* This will load up the node map and add ourselves to it. */
1849 status = ocfs2_find_slot(osb);
1850 if (status < 0) {
1851 mlog_errno(status);
1852 goto leave;
1853 }
1854
1855 /* load all node-local system inodes */
1856 status = ocfs2_init_local_system_inodes(osb);
1857 if (status < 0) {
1858 mlog_errno(status);
1859 goto leave;
1860 }
1861
1862 status = ocfs2_check_volume(osb);
1863 if (status < 0) {
1864 mlog_errno(status);
1865 goto leave;
1866 }
1867
1868 status = ocfs2_truncate_log_init(osb);
1869 if (status < 0)
1870 mlog_errno(status);
1871
1872 leave:
1873 if (unlock_super)
1874 ocfs2_super_unlock(osb, 1);
1875
1876 mlog_exit(status);
1877 return status;
1878 }
1879
1880 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1881 {
1882 int tmp, hangup_needed = 0;
1883 struct ocfs2_super *osb = NULL;
1884 char nodestr[8];
1885
1886 mlog_entry("(0x%p)\n", sb);
1887
1888 BUG_ON(!sb);
1889 osb = OCFS2_SB(sb);
1890 BUG_ON(!osb);
1891
1892 debugfs_remove(osb->osb_ctxt);
1893
1894 /*
1895 * Flush inode dropping work queue so that deletes are
1896 * performed while the filesystem is still working
1897 */
1898 ocfs2_drop_all_dl_inodes(osb);
1899
1900 /* Orphan scan should be stopped as early as possible */
1901 ocfs2_orphan_scan_stop(osb);
1902
1903 ocfs2_disable_quotas(osb);
1904
1905 ocfs2_shutdown_local_alloc(osb);
1906
1907 ocfs2_truncate_log_shutdown(osb);
1908
1909 /* This will disable recovery and flush any recovery work. */
1910 ocfs2_recovery_exit(osb);
1911
1912 ocfs2_journal_shutdown(osb);
1913
1914 ocfs2_sync_blockdev(sb);
1915
1916 ocfs2_purge_refcount_trees(osb);
1917
1918 /* No cluster connection means we've failed during mount, so skip
1919 * all the steps which depended on that to complete. */
1920 if (osb->cconn) {
1921 tmp = ocfs2_super_lock(osb, 1);
1922 if (tmp < 0) {
1923 mlog_errno(tmp);
1924 return;
1925 }
1926 }
1927
1928 if (osb->slot_num != OCFS2_INVALID_SLOT)
1929 ocfs2_put_slot(osb);
1930
1931 if (osb->cconn)
1932 ocfs2_super_unlock(osb, 1);
1933
1934 ocfs2_release_system_inodes(osb);
1935
1936 /*
1937 * If we're dismounting due to mount error, mount.ocfs2 will clean
1938 * up heartbeat. If we're a local mount, there is no heartbeat.
1939 * If we failed before we got a uuid_str yet, we can't stop
1940 * heartbeat. Otherwise, do it.
1941 */
1942 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1943 hangup_needed = 1;
1944
1945 if (osb->cconn)
1946 ocfs2_dlm_shutdown(osb, hangup_needed);
1947
1948 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1949 debugfs_remove(osb->osb_debug_root);
1950
1951 if (hangup_needed)
1952 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1953
1954 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1955
1956 if (ocfs2_mount_local(osb))
1957 snprintf(nodestr, sizeof(nodestr), "local");
1958 else
1959 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1960
1961 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1962 osb->dev_str, nodestr);
1963
1964 ocfs2_delete_osb(osb);
1965 kfree(osb);
1966 sb->s_dev = 0;
1967 sb->s_fs_info = NULL;
1968 }
1969
1970 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1971 unsigned uuid_bytes)
1972 {
1973 int i, ret;
1974 char *ptr;
1975
1976 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1977
1978 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1979 if (osb->uuid_str == NULL)
1980 return -ENOMEM;
1981
1982 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1983 /* print with null */
1984 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1985 if (ret != 2) /* drop super cleans up */
1986 return -EINVAL;
1987 /* then only advance past the last char */
1988 ptr += 2;
1989 }
1990
1991 return 0;
1992 }
1993
1994 static int ocfs2_initialize_super(struct super_block *sb,
1995 struct buffer_head *bh,
1996 int sector_size,
1997 struct ocfs2_blockcheck_stats *stats)
1998 {
1999 int status;
2000 int i, cbits, bbits;
2001 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2002 struct inode *inode = NULL;
2003 struct ocfs2_journal *journal;
2004 __le32 uuid_net_key;
2005 struct ocfs2_super *osb;
2006
2007 mlog_entry_void();
2008
2009 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2010 if (!osb) {
2011 status = -ENOMEM;
2012 mlog_errno(status);
2013 goto bail;
2014 }
2015
2016 sb->s_fs_info = osb;
2017 sb->s_op = &ocfs2_sops;
2018 sb->s_export_op = &ocfs2_export_ops;
2019 sb->s_qcop = &ocfs2_quotactl_ops;
2020 sb->dq_op = &ocfs2_quota_operations;
2021 sb->s_xattr = ocfs2_xattr_handlers;
2022 sb->s_time_gran = 1;
2023 sb->s_flags |= MS_NOATIME;
2024 /* this is needed to support O_LARGEFILE */
2025 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2026 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2027 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2028
2029 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2030
2031 for (i = 0; i < 3; i++)
2032 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2033 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2034
2035 osb->sb = sb;
2036 /* Save off for ocfs2_rw_direct */
2037 osb->s_sectsize_bits = blksize_bits(sector_size);
2038 BUG_ON(!osb->s_sectsize_bits);
2039
2040 spin_lock_init(&osb->dc_task_lock);
2041 init_waitqueue_head(&osb->dc_event);
2042 osb->dc_work_sequence = 0;
2043 osb->dc_wake_sequence = 0;
2044 INIT_LIST_HEAD(&osb->blocked_lock_list);
2045 osb->blocked_lock_count = 0;
2046 spin_lock_init(&osb->osb_lock);
2047 spin_lock_init(&osb->osb_xattr_lock);
2048 ocfs2_init_steal_slots(osb);
2049
2050 atomic_set(&osb->alloc_stats.moves, 0);
2051 atomic_set(&osb->alloc_stats.local_data, 0);
2052 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2053 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2054 atomic_set(&osb->alloc_stats.bg_extends, 0);
2055
2056 /* Copy the blockcheck stats from the superblock probe */
2057 osb->osb_ecc_stats = *stats;
2058
2059 ocfs2_init_node_maps(osb);
2060
2061 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2062 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2063
2064 ocfs2_orphan_scan_init(osb);
2065
2066 status = ocfs2_recovery_init(osb);
2067 if (status) {
2068 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2069 mlog_errno(status);
2070 goto bail;
2071 }
2072
2073 init_waitqueue_head(&osb->checkpoint_event);
2074 atomic_set(&osb->needs_checkpoint, 0);
2075
2076 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2077
2078 osb->slot_num = OCFS2_INVALID_SLOT;
2079
2080 osb->s_xattr_inline_size = le16_to_cpu(
2081 di->id2.i_super.s_xattr_inline_size);
2082
2083 osb->local_alloc_state = OCFS2_LA_UNUSED;
2084 osb->local_alloc_bh = NULL;
2085 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2086
2087 init_waitqueue_head(&osb->osb_mount_event);
2088
2089 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2090 if (status) {
2091 mlog_errno(status);
2092 goto bail;
2093 }
2094
2095 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2096 if (!osb->vol_label) {
2097 mlog(ML_ERROR, "unable to alloc vol label\n");
2098 status = -ENOMEM;
2099 goto bail;
2100 }
2101
2102 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2103 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2104 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2105 osb->max_slots);
2106 status = -EINVAL;
2107 goto bail;
2108 }
2109 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2110
2111 osb->slot_recovery_generations =
2112 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2113 GFP_KERNEL);
2114 if (!osb->slot_recovery_generations) {
2115 status = -ENOMEM;
2116 mlog_errno(status);
2117 goto bail;
2118 }
2119
2120 init_waitqueue_head(&osb->osb_wipe_event);
2121 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2122 sizeof(*osb->osb_orphan_wipes),
2123 GFP_KERNEL);
2124 if (!osb->osb_orphan_wipes) {
2125 status = -ENOMEM;
2126 mlog_errno(status);
2127 goto bail;
2128 }
2129
2130 osb->osb_rf_lock_tree = RB_ROOT;
2131
2132 osb->s_feature_compat =
2133 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2134 osb->s_feature_ro_compat =
2135 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2136 osb->s_feature_incompat =
2137 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2138
2139 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2140 mlog(ML_ERROR, "couldn't mount because of unsupported "
2141 "optional features (%x).\n", i);
2142 status = -EINVAL;
2143 goto bail;
2144 }
2145 if (!(osb->sb->s_flags & MS_RDONLY) &&
2146 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2147 mlog(ML_ERROR, "couldn't mount RDWR because of "
2148 "unsupported optional features (%x).\n", i);
2149 status = -EINVAL;
2150 goto bail;
2151 }
2152
2153 if (ocfs2_userspace_stack(osb)) {
2154 memcpy(osb->osb_cluster_stack,
2155 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2156 OCFS2_STACK_LABEL_LEN);
2157 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2158 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2159 mlog(ML_ERROR,
2160 "couldn't mount because of an invalid "
2161 "cluster stack label (%s) \n",
2162 osb->osb_cluster_stack);
2163 status = -EINVAL;
2164 goto bail;
2165 }
2166 } else {
2167 /* The empty string is identical with classic tools that
2168 * don't know about s_cluster_info. */
2169 osb->osb_cluster_stack[0] = '\0';
2170 }
2171
2172 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2173
2174 /* FIXME
2175 * This should be done in ocfs2_journal_init(), but unknown
2176 * ordering issues will cause the filesystem to crash.
2177 * If anyone wants to figure out what part of the code
2178 * refers to osb->journal before ocfs2_journal_init() is run,
2179 * be my guest.
2180 */
2181 /* initialize our journal structure */
2182
2183 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2184 if (!journal) {
2185 mlog(ML_ERROR, "unable to alloc journal\n");
2186 status = -ENOMEM;
2187 goto bail;
2188 }
2189 osb->journal = journal;
2190 journal->j_osb = osb;
2191
2192 atomic_set(&journal->j_num_trans, 0);
2193 init_rwsem(&journal->j_trans_barrier);
2194 init_waitqueue_head(&journal->j_checkpointed);
2195 spin_lock_init(&journal->j_lock);
2196 journal->j_trans_id = (unsigned long) 1;
2197 INIT_LIST_HEAD(&journal->j_la_cleanups);
2198 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2199 journal->j_state = OCFS2_JOURNAL_FREE;
2200
2201 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2202 osb->dentry_lock_list = NULL;
2203
2204 /* get some pseudo constants for clustersize bits */
2205 osb->s_clustersize_bits =
2206 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2207 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2208 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2209
2210 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2211 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2212 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2213 osb->s_clustersize);
2214 status = -EINVAL;
2215 goto bail;
2216 }
2217
2218 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
2219 > (u32)~0UL) {
2220 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
2221 "what jbd can address in 32 bits.\n");
2222 status = -EINVAL;
2223 goto bail;
2224 }
2225
2226 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2227 sizeof(di->id2.i_super.s_uuid))) {
2228 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2229 status = -ENOMEM;
2230 goto bail;
2231 }
2232
2233 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2234
2235 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2236 osb->vol_label[63] = '\0';
2237 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2238 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2239 osb->first_cluster_group_blkno =
2240 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2241 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2242 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2243 mlog(0, "vol_label: %s\n", osb->vol_label);
2244 mlog(0, "uuid: %s\n", osb->uuid_str);
2245 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2246 (unsigned long long)osb->root_blkno,
2247 (unsigned long long)osb->system_dir_blkno);
2248
2249 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2250 if (!osb->osb_dlm_debug) {
2251 status = -ENOMEM;
2252 mlog_errno(status);
2253 goto bail;
2254 }
2255
2256 atomic_set(&osb->vol_state, VOLUME_INIT);
2257
2258 /* load root, system_dir, and all global system inodes */
2259 status = ocfs2_init_global_system_inodes(osb);
2260 if (status < 0) {
2261 mlog_errno(status);
2262 goto bail;
2263 }
2264
2265 /*
2266 * global bitmap
2267 */
2268 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2269 OCFS2_INVALID_SLOT);
2270 if (!inode) {
2271 status = -EINVAL;
2272 mlog_errno(status);
2273 goto bail;
2274 }
2275
2276 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2277 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2278 iput(inode);
2279
2280 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2281 osb->s_feature_incompat) * 8;
2282
2283 status = ocfs2_init_slot_info(osb);
2284 if (status < 0) {
2285 mlog_errno(status);
2286 goto bail;
2287 }
2288
2289 bail:
2290 mlog_exit(status);
2291 return status;
2292 }
2293
2294 /*
2295 * will return: -EAGAIN if it is ok to keep searching for superblocks
2296 * -EINVAL if there is a bad superblock
2297 * 0 on success
2298 */
2299 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2300 struct buffer_head *bh,
2301 u32 blksz,
2302 struct ocfs2_blockcheck_stats *stats)
2303 {
2304 int status = -EAGAIN;
2305
2306 mlog_entry_void();
2307
2308 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2309 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2310 /* We have to do a raw check of the feature here */
2311 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2312 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2313 status = ocfs2_block_check_validate(bh->b_data,
2314 bh->b_size,
2315 &di->i_check,
2316 stats);
2317 if (status)
2318 goto out;
2319 }
2320 status = -EINVAL;
2321 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2322 mlog(ML_ERROR, "found superblock with incorrect block "
2323 "size: found %u, should be %u\n",
2324 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2325 blksz);
2326 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2327 OCFS2_MAJOR_REV_LEVEL ||
2328 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2329 OCFS2_MINOR_REV_LEVEL) {
2330 mlog(ML_ERROR, "found superblock with bad version: "
2331 "found %u.%u, should be %u.%u\n",
2332 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2333 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2334 OCFS2_MAJOR_REV_LEVEL,
2335 OCFS2_MINOR_REV_LEVEL);
2336 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2337 mlog(ML_ERROR, "bad block number on superblock: "
2338 "found %llu, should be %llu\n",
2339 (unsigned long long)le64_to_cpu(di->i_blkno),
2340 (unsigned long long)bh->b_blocknr);
2341 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2342 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2343 mlog(ML_ERROR, "bad cluster size found: %u\n",
2344 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2345 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2346 mlog(ML_ERROR, "bad root_blkno: 0\n");
2347 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2348 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2349 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2350 mlog(ML_ERROR,
2351 "Superblock slots found greater than file system "
2352 "maximum: found %u, max %u\n",
2353 le16_to_cpu(di->id2.i_super.s_max_slots),
2354 OCFS2_MAX_SLOTS);
2355 } else {
2356 /* found it! */
2357 status = 0;
2358 }
2359 }
2360
2361 out:
2362 mlog_exit(status);
2363 return status;
2364 }
2365
2366 static int ocfs2_check_volume(struct ocfs2_super *osb)
2367 {
2368 int status;
2369 int dirty;
2370 int local;
2371 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2372 * recover
2373 * ourselves. */
2374
2375 mlog_entry_void();
2376
2377 /* Init our journal object. */
2378 status = ocfs2_journal_init(osb->journal, &dirty);
2379 if (status < 0) {
2380 mlog(ML_ERROR, "Could not initialize journal!\n");
2381 goto finally;
2382 }
2383
2384 /* If the journal was unmounted cleanly then we don't want to
2385 * recover anything. Otherwise, journal_load will do that
2386 * dirty work for us :) */
2387 if (!dirty) {
2388 status = ocfs2_journal_wipe(osb->journal, 0);
2389 if (status < 0) {
2390 mlog_errno(status);
2391 goto finally;
2392 }
2393 } else {
2394 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2395 "recovering volume.\n");
2396 }
2397
2398 local = ocfs2_mount_local(osb);
2399
2400 /* will play back anything left in the journal. */
2401 status = ocfs2_journal_load(osb->journal, local, dirty);
2402 if (status < 0) {
2403 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2404 goto finally;
2405 }
2406
2407 if (dirty) {
2408 /* recover my local alloc if we didn't unmount cleanly. */
2409 status = ocfs2_begin_local_alloc_recovery(osb,
2410 osb->slot_num,
2411 &local_alloc);
2412 if (status < 0) {
2413 mlog_errno(status);
2414 goto finally;
2415 }
2416 /* we complete the recovery process after we've marked
2417 * ourselves as mounted. */
2418 }
2419
2420 mlog(0, "Journal loaded.\n");
2421
2422 status = ocfs2_load_local_alloc(osb);
2423 if (status < 0) {
2424 mlog_errno(status);
2425 goto finally;
2426 }
2427
2428 if (dirty) {
2429 /* Recovery will be completed after we've mounted the
2430 * rest of the volume. */
2431 osb->dirty = 1;
2432 osb->local_alloc_copy = local_alloc;
2433 local_alloc = NULL;
2434 }
2435
2436 /* go through each journal, trylock it and if you get the
2437 * lock, and it's marked as dirty, set the bit in the recover
2438 * map and launch a recovery thread for it. */
2439 status = ocfs2_mark_dead_nodes(osb);
2440 if (status < 0) {
2441 mlog_errno(status);
2442 goto finally;
2443 }
2444
2445 status = ocfs2_compute_replay_slots(osb);
2446 if (status < 0)
2447 mlog_errno(status);
2448
2449 finally:
2450 if (local_alloc)
2451 kfree(local_alloc);
2452
2453 mlog_exit(status);
2454 return status;
2455 }
2456
2457 /*
2458 * The routine gets called from dismount or close whenever a dismount on
2459 * volume is requested and the osb open count becomes 1.
2460 * It will remove the osb from the global list and also free up all the
2461 * initialized resources and fileobject.
2462 */
2463 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2464 {
2465 mlog_entry_void();
2466
2467 /* This function assumes that the caller has the main osb resource */
2468
2469 ocfs2_free_slot_info(osb);
2470
2471 kfree(osb->osb_orphan_wipes);
2472 kfree(osb->slot_recovery_generations);
2473 /* FIXME
2474 * This belongs in journal shutdown, but because we have to
2475 * allocate osb->journal at the start of ocfs2_initalize_osb(),
2476 * we free it here.
2477 */
2478 kfree(osb->journal);
2479 if (osb->local_alloc_copy)
2480 kfree(osb->local_alloc_copy);
2481 kfree(osb->uuid_str);
2482 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2483 memset(osb, 0, sizeof(struct ocfs2_super));
2484
2485 mlog_exit_void();
2486 }
2487
2488 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2489 * panic(). We do not support continue-on-error operation. */
2490 static void ocfs2_handle_error(struct super_block *sb)
2491 {
2492 struct ocfs2_super *osb = OCFS2_SB(sb);
2493
2494 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2495 panic("OCFS2: (device %s): panic forced after error\n",
2496 sb->s_id);
2497
2498 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2499
2500 if (sb->s_flags & MS_RDONLY &&
2501 (ocfs2_is_soft_readonly(osb) ||
2502 ocfs2_is_hard_readonly(osb)))
2503 return;
2504
2505 printk(KERN_CRIT "File system is now read-only due to the potential "
2506 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2507 "system is unmounted.\n");
2508 sb->s_flags |= MS_RDONLY;
2509 ocfs2_set_ro_flag(osb, 0);
2510 }
2511
2512 static char error_buf[1024];
2513
2514 void __ocfs2_error(struct super_block *sb,
2515 const char *function,
2516 const char *fmt, ...)
2517 {
2518 va_list args;
2519
2520 va_start(args, fmt);
2521 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2522 va_end(args);
2523
2524 /* Not using mlog here because we want to show the actual
2525 * function the error came from. */
2526 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2527 sb->s_id, function, error_buf);
2528
2529 ocfs2_handle_error(sb);
2530 }
2531
2532 /* Handle critical errors. This is intentionally more drastic than
2533 * ocfs2_handle_error, so we only use for things like journal errors,
2534 * etc. */
2535 void __ocfs2_abort(struct super_block* sb,
2536 const char *function,
2537 const char *fmt, ...)
2538 {
2539 va_list args;
2540
2541 va_start(args, fmt);
2542 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2543 va_end(args);
2544
2545 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2546 sb->s_id, function, error_buf);
2547
2548 /* We don't have the cluster support yet to go straight to
2549 * hard readonly in here. Until then, we want to keep
2550 * ocfs2_abort() so that we can at least mark critical
2551 * errors.
2552 *
2553 * TODO: This should abort the journal and alert other nodes
2554 * that our slot needs recovery. */
2555
2556 /* Force a panic(). This stinks, but it's better than letting
2557 * things continue without having a proper hard readonly
2558 * here. */
2559 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2560 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2561 ocfs2_handle_error(sb);
2562 }
2563
2564 /*
2565 * Void signal blockers, because in-kernel sigprocmask() only fails
2566 * when SIG_* is wrong.
2567 */
2568 void ocfs2_block_signals(sigset_t *oldset)
2569 {
2570 int rc;
2571 sigset_t blocked;
2572
2573 sigfillset(&blocked);
2574 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2575 BUG_ON(rc);
2576 }
2577
2578 void ocfs2_unblock_signals(sigset_t *oldset)
2579 {
2580 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2581 BUG_ON(rc);
2582 }
2583
2584 module_init(ocfs2_init);
2585 module_exit(ocfs2_exit);
Mirror of Nicolas Pitre's orion git repository