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kmemcg: account certain kmem allocations to memcg
[deliverable/linux.git] / fs / ocfs2 / super.c
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/cleancache.h>
45
46 #define CREATE_TRACE_POINTS
47 #include "ocfs2_trace.h"
48
49 #include <cluster/masklog.h>
50
51 #include "ocfs2.h"
52
53 /* this should be the only file to include a version 1 header */
54 #include "ocfs1_fs_compat.h"
55
56 #include "alloc.h"
57 #include "aops.h"
58 #include "blockcheck.h"
59 #include "dlmglue.h"
60 #include "export.h"
61 #include "extent_map.h"
62 #include "heartbeat.h"
63 #include "inode.h"
64 #include "journal.h"
65 #include "localalloc.h"
66 #include "namei.h"
67 #include "slot_map.h"
68 #include "super.h"
69 #include "sysfile.h"
70 #include "uptodate.h"
71 #include "xattr.h"
72 #include "quota.h"
73 #include "refcounttree.h"
74 #include "suballoc.h"
75
76 #include "buffer_head_io.h"
77
78 static struct kmem_cache *ocfs2_inode_cachep;
79 struct kmem_cache *ocfs2_dquot_cachep;
80 struct kmem_cache *ocfs2_qf_chunk_cachep;
81
82 /* OCFS2 needs to schedule several different types of work which
83 * require cluster locking, disk I/O, recovery waits, etc. Since these
84 * types of work tend to be heavy we avoid using the kernel events
85 * workqueue and schedule on our own. */
86 struct workqueue_struct *ocfs2_wq = NULL;
87
88 static struct dentry *ocfs2_debugfs_root;
89
90 MODULE_AUTHOR("Oracle");
91 MODULE_LICENSE("GPL");
92 MODULE_DESCRIPTION("OCFS2 cluster file system");
93
94 struct mount_options
95 {
96 unsigned long commit_interval;
97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
100 int localalloc_opt;
101 unsigned int resv_level;
102 int dir_resv_level;
103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
104 };
105
106 static int ocfs2_parse_options(struct super_block *sb, char *options,
107 struct mount_options *mopt,
108 int is_remount);
109 static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
111 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
112 static void ocfs2_put_super(struct super_block *sb);
113 static int ocfs2_mount_volume(struct super_block *sb);
114 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116 static int ocfs2_initialize_mem_caches(void);
117 static void ocfs2_free_mem_caches(void);
118 static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
120 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
121
122 static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
126 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
127 static int ocfs2_check_volume(struct ocfs2_super *osb);
128 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
132 static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
136 static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
140 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141 static void ocfs2_destroy_inode(struct inode *inode);
142 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
145
146 static struct dquot **ocfs2_get_dquots(struct inode *inode)
147 {
148 return OCFS2_I(inode)->i_dquot;
149 }
150
151 static const struct super_operations ocfs2_sops = {
152 .statfs = ocfs2_statfs,
153 .alloc_inode = ocfs2_alloc_inode,
154 .destroy_inode = ocfs2_destroy_inode,
155 .drop_inode = ocfs2_drop_inode,
156 .evict_inode = ocfs2_evict_inode,
157 .sync_fs = ocfs2_sync_fs,
158 .put_super = ocfs2_put_super,
159 .remount_fs = ocfs2_remount,
160 .show_options = ocfs2_show_options,
161 .quota_read = ocfs2_quota_read,
162 .quota_write = ocfs2_quota_write,
163 .get_dquots = ocfs2_get_dquots,
164 };
165
166 enum {
167 Opt_barrier,
168 Opt_err_panic,
169 Opt_err_ro,
170 Opt_intr,
171 Opt_nointr,
172 Opt_hb_none,
173 Opt_hb_local,
174 Opt_hb_global,
175 Opt_data_ordered,
176 Opt_data_writeback,
177 Opt_atime_quantum,
178 Opt_slot,
179 Opt_commit,
180 Opt_localalloc,
181 Opt_localflocks,
182 Opt_stack,
183 Opt_user_xattr,
184 Opt_nouser_xattr,
185 Opt_inode64,
186 Opt_acl,
187 Opt_noacl,
188 Opt_usrquota,
189 Opt_grpquota,
190 Opt_coherency_buffered,
191 Opt_coherency_full,
192 Opt_resv_level,
193 Opt_dir_resv_level,
194 Opt_journal_async_commit,
195 Opt_err_cont,
196 Opt_err,
197 };
198
199 static const match_table_t tokens = {
200 {Opt_barrier, "barrier=%u"},
201 {Opt_err_panic, "errors=panic"},
202 {Opt_err_ro, "errors=remount-ro"},
203 {Opt_intr, "intr"},
204 {Opt_nointr, "nointr"},
205 {Opt_hb_none, OCFS2_HB_NONE},
206 {Opt_hb_local, OCFS2_HB_LOCAL},
207 {Opt_hb_global, OCFS2_HB_GLOBAL},
208 {Opt_data_ordered, "data=ordered"},
209 {Opt_data_writeback, "data=writeback"},
210 {Opt_atime_quantum, "atime_quantum=%u"},
211 {Opt_slot, "preferred_slot=%u"},
212 {Opt_commit, "commit=%u"},
213 {Opt_localalloc, "localalloc=%d"},
214 {Opt_localflocks, "localflocks"},
215 {Opt_stack, "cluster_stack=%s"},
216 {Opt_user_xattr, "user_xattr"},
217 {Opt_nouser_xattr, "nouser_xattr"},
218 {Opt_inode64, "inode64"},
219 {Opt_acl, "acl"},
220 {Opt_noacl, "noacl"},
221 {Opt_usrquota, "usrquota"},
222 {Opt_grpquota, "grpquota"},
223 {Opt_coherency_buffered, "coherency=buffered"},
224 {Opt_coherency_full, "coherency=full"},
225 {Opt_resv_level, "resv_level=%u"},
226 {Opt_dir_resv_level, "dir_resv_level=%u"},
227 {Opt_journal_async_commit, "journal_async_commit"},
228 {Opt_err_cont, "errors=continue"},
229 {Opt_err, NULL}
230 };
231
232 #ifdef CONFIG_DEBUG_FS
233 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
234 {
235 struct ocfs2_cluster_connection *cconn = osb->cconn;
236 struct ocfs2_recovery_map *rm = osb->recovery_map;
237 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
238 int i, out = 0;
239
240 out += snprintf(buf + out, len - out,
241 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
242 "Device", osb->dev_str, osb->uuid_str,
243 osb->fs_generation, osb->vol_label);
244
245 out += snprintf(buf + out, len - out,
246 "%10s => State: %d Flags: 0x%lX\n", "Volume",
247 atomic_read(&osb->vol_state), osb->osb_flags);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Block: %lu Cluster: %d\n", "Sizes",
251 osb->sb->s_blocksize, osb->s_clustersize);
252
253 out += snprintf(buf + out, len - out,
254 "%10s => Compat: 0x%X Incompat: 0x%X "
255 "ROcompat: 0x%X\n",
256 "Features", osb->s_feature_compat,
257 osb->s_feature_incompat, osb->s_feature_ro_compat);
258
259 out += snprintf(buf + out, len - out,
260 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
261 osb->s_mount_opt, osb->s_atime_quantum);
262
263 if (cconn) {
264 out += snprintf(buf + out, len - out,
265 "%10s => Stack: %s Name: %*s "
266 "Version: %d.%d\n", "Cluster",
267 (*osb->osb_cluster_stack == '\0' ?
268 "o2cb" : osb->osb_cluster_stack),
269 cconn->cc_namelen, cconn->cc_name,
270 cconn->cc_version.pv_major,
271 cconn->cc_version.pv_minor);
272 }
273
274 spin_lock(&osb->dc_task_lock);
275 out += snprintf(buf + out, len - out,
276 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
277 "WorkSeq: %lu\n", "DownCnvt",
278 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
279 osb->blocked_lock_count, osb->dc_wake_sequence,
280 osb->dc_work_sequence);
281 spin_unlock(&osb->dc_task_lock);
282
283 spin_lock(&osb->osb_lock);
284 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
285 "Recovery",
286 (osb->recovery_thread_task ?
287 task_pid_nr(osb->recovery_thread_task) : -1));
288 if (rm->rm_used == 0)
289 out += snprintf(buf + out, len - out, " None\n");
290 else {
291 for (i = 0; i < rm->rm_used; i++)
292 out += snprintf(buf + out, len - out, " %d",
293 rm->rm_entries[i]);
294 out += snprintf(buf + out, len - out, "\n");
295 }
296 spin_unlock(&osb->osb_lock);
297
298 out += snprintf(buf + out, len - out,
299 "%10s => Pid: %d Interval: %lu\n", "Commit",
300 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
301 osb->osb_commit_interval);
302
303 out += snprintf(buf + out, len - out,
304 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
305 "Journal", osb->journal->j_state,
306 osb->journal->j_trans_id,
307 atomic_read(&osb->journal->j_num_trans));
308
309 out += snprintf(buf + out, len - out,
310 "%10s => GlobalAllocs: %d LocalAllocs: %d "
311 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
312 "Stats",
313 atomic_read(&osb->alloc_stats.bitmap_data),
314 atomic_read(&osb->alloc_stats.local_data),
315 atomic_read(&osb->alloc_stats.bg_allocs),
316 atomic_read(&osb->alloc_stats.moves),
317 atomic_read(&osb->alloc_stats.bg_extends));
318
319 out += snprintf(buf + out, len - out,
320 "%10s => State: %u Descriptor: %llu Size: %u bits "
321 "Default: %u bits\n",
322 "LocalAlloc", osb->local_alloc_state,
323 (unsigned long long)osb->la_last_gd,
324 osb->local_alloc_bits, osb->local_alloc_default_bits);
325
326 spin_lock(&osb->osb_lock);
327 out += snprintf(buf + out, len - out,
328 "%10s => InodeSlot: %d StolenInodes: %d, "
329 "MetaSlot: %d StolenMeta: %d\n", "Steal",
330 osb->s_inode_steal_slot,
331 atomic_read(&osb->s_num_inodes_stolen),
332 osb->s_meta_steal_slot,
333 atomic_read(&osb->s_num_meta_stolen));
334 spin_unlock(&osb->osb_lock);
335
336 out += snprintf(buf + out, len - out, "OrphanScan => ");
337 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
338 os->os_count, os->os_seqno);
339 out += snprintf(buf + out, len - out, " Last Scan: ");
340 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
341 out += snprintf(buf + out, len - out, "Disabled\n");
342 else
343 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
344 (get_seconds() - os->os_scantime.tv_sec));
345
346 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
347 "Slots", "Num", "RecoGen");
348 for (i = 0; i < osb->max_slots; ++i) {
349 out += snprintf(buf + out, len - out,
350 "%10s %c %3d %10d\n",
351 " ",
352 (i == osb->slot_num ? '*' : ' '),
353 i, osb->slot_recovery_generations[i]);
354 }
355
356 return out;
357 }
358
359 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
360 {
361 struct ocfs2_super *osb = inode->i_private;
362 char *buf = NULL;
363
364 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
365 if (!buf)
366 goto bail;
367
368 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
369
370 file->private_data = buf;
371
372 return 0;
373 bail:
374 return -ENOMEM;
375 }
376
377 static int ocfs2_debug_release(struct inode *inode, struct file *file)
378 {
379 kfree(file->private_data);
380 return 0;
381 }
382
383 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
384 size_t nbytes, loff_t *ppos)
385 {
386 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
387 i_size_read(file->f_mapping->host));
388 }
389 #else
390 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
391 {
392 return 0;
393 }
394 static int ocfs2_debug_release(struct inode *inode, struct file *file)
395 {
396 return 0;
397 }
398 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
399 size_t nbytes, loff_t *ppos)
400 {
401 return 0;
402 }
403 #endif /* CONFIG_DEBUG_FS */
404
405 static const struct file_operations ocfs2_osb_debug_fops = {
406 .open = ocfs2_osb_debug_open,
407 .release = ocfs2_debug_release,
408 .read = ocfs2_debug_read,
409 .llseek = generic_file_llseek,
410 };
411
412 static int ocfs2_sync_fs(struct super_block *sb, int wait)
413 {
414 int status;
415 tid_t target;
416 struct ocfs2_super *osb = OCFS2_SB(sb);
417
418 if (ocfs2_is_hard_readonly(osb))
419 return -EROFS;
420
421 if (wait) {
422 status = ocfs2_flush_truncate_log(osb);
423 if (status < 0)
424 mlog_errno(status);
425 } else {
426 ocfs2_schedule_truncate_log_flush(osb, 0);
427 }
428
429 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
430 &target)) {
431 if (wait)
432 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
433 target);
434 }
435 return 0;
436 }
437
438 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
439 {
440 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
441 && (ino == USER_QUOTA_SYSTEM_INODE
442 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
443 return 0;
444 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
445 && (ino == GROUP_QUOTA_SYSTEM_INODE
446 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
447 return 0;
448 return 1;
449 }
450
451 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
452 {
453 struct inode *new = NULL;
454 int status = 0;
455 int i;
456
457 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
458 if (IS_ERR(new)) {
459 status = PTR_ERR(new);
460 mlog_errno(status);
461 goto bail;
462 }
463 osb->root_inode = new;
464
465 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
466 if (IS_ERR(new)) {
467 status = PTR_ERR(new);
468 mlog_errno(status);
469 goto bail;
470 }
471 osb->sys_root_inode = new;
472
473 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
474 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
475 if (!ocfs2_need_system_inode(osb, i))
476 continue;
477 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
478 if (!new) {
479 ocfs2_release_system_inodes(osb);
480 status = -EINVAL;
481 mlog_errno(status);
482 /* FIXME: Should ERROR_RO_FS */
483 mlog(ML_ERROR, "Unable to load system inode %d, "
484 "possibly corrupt fs?", i);
485 goto bail;
486 }
487 // the array now has one ref, so drop this one
488 iput(new);
489 }
490
491 bail:
492 if (status)
493 mlog_errno(status);
494 return status;
495 }
496
497 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
498 {
499 struct inode *new = NULL;
500 int status = 0;
501 int i;
502
503 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
504 i < NUM_SYSTEM_INODES;
505 i++) {
506 if (!ocfs2_need_system_inode(osb, i))
507 continue;
508 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
509 if (!new) {
510 ocfs2_release_system_inodes(osb);
511 status = -EINVAL;
512 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
513 status, i, osb->slot_num);
514 goto bail;
515 }
516 /* the array now has one ref, so drop this one */
517 iput(new);
518 }
519
520 bail:
521 if (status)
522 mlog_errno(status);
523 return status;
524 }
525
526 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
527 {
528 int i;
529 struct inode *inode;
530
531 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
532 inode = osb->global_system_inodes[i];
533 if (inode) {
534 iput(inode);
535 osb->global_system_inodes[i] = NULL;
536 }
537 }
538
539 inode = osb->sys_root_inode;
540 if (inode) {
541 iput(inode);
542 osb->sys_root_inode = NULL;
543 }
544
545 inode = osb->root_inode;
546 if (inode) {
547 iput(inode);
548 osb->root_inode = NULL;
549 }
550
551 if (!osb->local_system_inodes)
552 return;
553
554 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
555 if (osb->local_system_inodes[i]) {
556 iput(osb->local_system_inodes[i]);
557 osb->local_system_inodes[i] = NULL;
558 }
559 }
560
561 kfree(osb->local_system_inodes);
562 osb->local_system_inodes = NULL;
563 }
564
565 /* We're allocating fs objects, use GFP_NOFS */
566 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
567 {
568 struct ocfs2_inode_info *oi;
569
570 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
571 if (!oi)
572 return NULL;
573
574 oi->i_sync_tid = 0;
575 oi->i_datasync_tid = 0;
576 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
577
578 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
579 return &oi->vfs_inode;
580 }
581
582 static void ocfs2_i_callback(struct rcu_head *head)
583 {
584 struct inode *inode = container_of(head, struct inode, i_rcu);
585 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
586 }
587
588 static void ocfs2_destroy_inode(struct inode *inode)
589 {
590 call_rcu(&inode->i_rcu, ocfs2_i_callback);
591 }
592
593 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
594 unsigned int cbits)
595 {
596 unsigned int bytes = 1 << cbits;
597 unsigned int trim = bytes;
598 unsigned int bitshift = 32;
599
600 /*
601 * i_size and all block offsets in ocfs2 are always 64 bits
602 * wide. i_clusters is 32 bits, in cluster-sized units. So on
603 * 64 bit platforms, cluster size will be the limiting factor.
604 */
605
606 #if BITS_PER_LONG == 32
607 # if defined(CONFIG_LBDAF)
608 BUILD_BUG_ON(sizeof(sector_t) != 8);
609 /*
610 * We might be limited by page cache size.
611 */
612 if (bytes > PAGE_CACHE_SIZE) {
613 bytes = PAGE_CACHE_SIZE;
614 trim = 1;
615 /*
616 * Shift by 31 here so that we don't get larger than
617 * MAX_LFS_FILESIZE
618 */
619 bitshift = 31;
620 }
621 # else
622 /*
623 * We are limited by the size of sector_t. Use block size, as
624 * that's what we expose to the VFS.
625 */
626 bytes = 1 << bbits;
627 trim = 1;
628 bitshift = 31;
629 # endif
630 #endif
631
632 /*
633 * Trim by a whole cluster when we can actually approach the
634 * on-disk limits. Otherwise we can overflow i_clusters when
635 * an extent start is at the max offset.
636 */
637 return (((unsigned long long)bytes) << bitshift) - trim;
638 }
639
640 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
641 {
642 int incompat_features;
643 int ret = 0;
644 struct mount_options parsed_options;
645 struct ocfs2_super *osb = OCFS2_SB(sb);
646 u32 tmp;
647
648 sync_filesystem(sb);
649
650 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
651 !ocfs2_check_set_options(sb, &parsed_options)) {
652 ret = -EINVAL;
653 goto out;
654 }
655
656 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
657 OCFS2_MOUNT_HB_NONE;
658 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
659 ret = -EINVAL;
660 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
661 goto out;
662 }
663
664 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
665 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
666 ret = -EINVAL;
667 mlog(ML_ERROR, "Cannot change data mode on remount\n");
668 goto out;
669 }
670
671 /* Probably don't want this on remount; it might
672 * mess with other nodes */
673 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
674 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
675 ret = -EINVAL;
676 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
677 goto out;
678 }
679
680 /* We're going to/from readonly mode. */
681 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
682 /* Disable quota accounting before remounting RO */
683 if (*flags & MS_RDONLY) {
684 ret = ocfs2_susp_quotas(osb, 0);
685 if (ret < 0)
686 goto out;
687 }
688 /* Lock here so the check of HARD_RO and the potential
689 * setting of SOFT_RO is atomic. */
690 spin_lock(&osb->osb_lock);
691 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
692 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
693 ret = -EROFS;
694 goto unlock_osb;
695 }
696
697 if (*flags & MS_RDONLY) {
698 sb->s_flags |= MS_RDONLY;
699 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
700 } else {
701 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
702 mlog(ML_ERROR, "Cannot remount RDWR "
703 "filesystem due to previous errors.\n");
704 ret = -EROFS;
705 goto unlock_osb;
706 }
707 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
708 if (incompat_features) {
709 mlog(ML_ERROR, "Cannot remount RDWR because "
710 "of unsupported optional features "
711 "(%x).\n", incompat_features);
712 ret = -EINVAL;
713 goto unlock_osb;
714 }
715 sb->s_flags &= ~MS_RDONLY;
716 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
717 }
718 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
719 unlock_osb:
720 spin_unlock(&osb->osb_lock);
721 /* Enable quota accounting after remounting RW */
722 if (!ret && !(*flags & MS_RDONLY)) {
723 if (sb_any_quota_suspended(sb))
724 ret = ocfs2_susp_quotas(osb, 1);
725 else
726 ret = ocfs2_enable_quotas(osb);
727 if (ret < 0) {
728 /* Return back changes... */
729 spin_lock(&osb->osb_lock);
730 sb->s_flags |= MS_RDONLY;
731 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
732 spin_unlock(&osb->osb_lock);
733 goto out;
734 }
735 }
736 }
737
738 if (!ret) {
739 /* Only save off the new mount options in case of a successful
740 * remount. */
741 osb->s_mount_opt = parsed_options.mount_opt;
742 osb->s_atime_quantum = parsed_options.atime_quantum;
743 osb->preferred_slot = parsed_options.slot;
744 if (parsed_options.commit_interval)
745 osb->osb_commit_interval = parsed_options.commit_interval;
746
747 if (!ocfs2_is_hard_readonly(osb))
748 ocfs2_set_journal_params(osb);
749
750 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
751 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
752 MS_POSIXACL : 0);
753 }
754 out:
755 return ret;
756 }
757
758 static int ocfs2_sb_probe(struct super_block *sb,
759 struct buffer_head **bh,
760 int *sector_size,
761 struct ocfs2_blockcheck_stats *stats)
762 {
763 int status, tmpstat;
764 struct ocfs1_vol_disk_hdr *hdr;
765 struct ocfs2_dinode *di;
766 int blksize;
767
768 *bh = NULL;
769
770 /* may be > 512 */
771 *sector_size = bdev_logical_block_size(sb->s_bdev);
772 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
773 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
774 *sector_size, OCFS2_MAX_BLOCKSIZE);
775 status = -EINVAL;
776 goto bail;
777 }
778
779 /* Can this really happen? */
780 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
781 *sector_size = OCFS2_MIN_BLOCKSIZE;
782
783 /* check block zero for old format */
784 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
785 if (status < 0) {
786 mlog_errno(status);
787 goto bail;
788 }
789 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
790 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
791 mlog(ML_ERROR, "incompatible version: %u.%u\n",
792 hdr->major_version, hdr->minor_version);
793 status = -EINVAL;
794 }
795 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
796 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
797 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
798 hdr->signature);
799 status = -EINVAL;
800 }
801 brelse(*bh);
802 *bh = NULL;
803 if (status < 0) {
804 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
805 "upgraded before mounting with ocfs v2\n");
806 goto bail;
807 }
808
809 /*
810 * Now check at magic offset for 512, 1024, 2048, 4096
811 * blocksizes. 4096 is the maximum blocksize because it is
812 * the minimum clustersize.
813 */
814 status = -EINVAL;
815 for (blksize = *sector_size;
816 blksize <= OCFS2_MAX_BLOCKSIZE;
817 blksize <<= 1) {
818 tmpstat = ocfs2_get_sector(sb, bh,
819 OCFS2_SUPER_BLOCK_BLKNO,
820 blksize);
821 if (tmpstat < 0) {
822 status = tmpstat;
823 mlog_errno(status);
824 break;
825 }
826 di = (struct ocfs2_dinode *) (*bh)->b_data;
827 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
828 spin_lock_init(&stats->b_lock);
829 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
830 if (tmpstat < 0) {
831 brelse(*bh);
832 *bh = NULL;
833 }
834 if (tmpstat != -EAGAIN) {
835 status = tmpstat;
836 break;
837 }
838 }
839
840 bail:
841 return status;
842 }
843
844 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
845 {
846 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
847
848 if (osb->s_mount_opt & hb_enabled) {
849 if (ocfs2_mount_local(osb)) {
850 mlog(ML_ERROR, "Cannot heartbeat on a locally "
851 "mounted device.\n");
852 return -EINVAL;
853 }
854 if (ocfs2_userspace_stack(osb)) {
855 mlog(ML_ERROR, "Userspace stack expected, but "
856 "o2cb heartbeat arguments passed to mount\n");
857 return -EINVAL;
858 }
859 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
860 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
861 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
862 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
863 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
864 return -EINVAL;
865 }
866 }
867
868 if (!(osb->s_mount_opt & hb_enabled)) {
869 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
870 !ocfs2_userspace_stack(osb)) {
871 mlog(ML_ERROR, "Heartbeat has to be started to mount "
872 "a read-write clustered device.\n");
873 return -EINVAL;
874 }
875 }
876
877 return 0;
878 }
879
880 /*
881 * If we're using a userspace stack, mount should have passed
882 * a name that matches the disk. If not, mount should not
883 * have passed a stack.
884 */
885 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
886 struct mount_options *mopt)
887 {
888 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
889 mlog(ML_ERROR,
890 "cluster stack passed to mount, but this filesystem "
891 "does not support it\n");
892 return -EINVAL;
893 }
894
895 if (ocfs2_userspace_stack(osb) &&
896 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
897 OCFS2_STACK_LABEL_LEN)) {
898 mlog(ML_ERROR,
899 "cluster stack passed to mount (\"%s\") does not "
900 "match the filesystem (\"%s\")\n",
901 mopt->cluster_stack,
902 osb->osb_cluster_stack);
903 return -EINVAL;
904 }
905
906 return 0;
907 }
908
909 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
910 {
911 int type;
912 struct super_block *sb = osb->sb;
913 unsigned int feature[OCFS2_MAXQUOTAS] = {
914 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
915 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
916 int status = 0;
917
918 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
919 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
920 continue;
921 if (unsuspend)
922 status = dquot_resume(sb, type);
923 else {
924 struct ocfs2_mem_dqinfo *oinfo;
925
926 /* Cancel periodic syncing before suspending */
927 oinfo = sb_dqinfo(sb, type)->dqi_priv;
928 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
929 status = dquot_suspend(sb, type);
930 }
931 if (status < 0)
932 break;
933 }
934 if (status < 0)
935 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
936 "remount (error = %d).\n", status);
937 return status;
938 }
939
940 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
941 {
942 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
943 struct super_block *sb = osb->sb;
944 unsigned int feature[OCFS2_MAXQUOTAS] = {
945 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
946 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
947 unsigned int ino[OCFS2_MAXQUOTAS] = {
948 LOCAL_USER_QUOTA_SYSTEM_INODE,
949 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
950 int status;
951 int type;
952
953 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
954 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
955 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
956 continue;
957 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
958 osb->slot_num);
959 if (!inode[type]) {
960 status = -ENOENT;
961 goto out_quota_off;
962 }
963 status = dquot_enable(inode[type], type, QFMT_OCFS2,
964 DQUOT_USAGE_ENABLED);
965 if (status < 0)
966 goto out_quota_off;
967 }
968
969 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
970 iput(inode[type]);
971 return 0;
972 out_quota_off:
973 ocfs2_disable_quotas(osb);
974 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
975 iput(inode[type]);
976 mlog_errno(status);
977 return status;
978 }
979
980 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
981 {
982 int type;
983 struct inode *inode;
984 struct super_block *sb = osb->sb;
985 struct ocfs2_mem_dqinfo *oinfo;
986
987 /* We mostly ignore errors in this function because there's not much
988 * we can do when we see them */
989 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
990 if (!sb_has_quota_loaded(sb, type))
991 continue;
992 /* Cancel periodic syncing before we grab dqonoff_mutex */
993 oinfo = sb_dqinfo(sb, type)->dqi_priv;
994 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
995 inode = igrab(sb->s_dquot.files[type]);
996 /* Turn off quotas. This will remove all dquot structures from
997 * memory and so they will be automatically synced to global
998 * quota files */
999 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
1000 DQUOT_LIMITS_ENABLED);
1001 if (!inode)
1002 continue;
1003 iput(inode);
1004 }
1005 }
1006
1007 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1008 {
1009 struct dentry *root;
1010 int status, sector_size;
1011 struct mount_options parsed_options;
1012 struct inode *inode = NULL;
1013 struct ocfs2_super *osb = NULL;
1014 struct buffer_head *bh = NULL;
1015 char nodestr[12];
1016 struct ocfs2_blockcheck_stats stats;
1017
1018 trace_ocfs2_fill_super(sb, data, silent);
1019
1020 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1021 status = -EINVAL;
1022 goto read_super_error;
1023 }
1024
1025 /* probe for superblock */
1026 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
1027 if (status < 0) {
1028 mlog(ML_ERROR, "superblock probe failed!\n");
1029 goto read_super_error;
1030 }
1031
1032 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1033 osb = OCFS2_SB(sb);
1034 if (status < 0) {
1035 mlog_errno(status);
1036 goto read_super_error;
1037 }
1038 brelse(bh);
1039 bh = NULL;
1040
1041 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1042 status = -EINVAL;
1043 goto read_super_error;
1044 }
1045 osb->s_mount_opt = parsed_options.mount_opt;
1046 osb->s_atime_quantum = parsed_options.atime_quantum;
1047 osb->preferred_slot = parsed_options.slot;
1048 osb->osb_commit_interval = parsed_options.commit_interval;
1049
1050 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1051 osb->osb_resv_level = parsed_options.resv_level;
1052 osb->osb_dir_resv_level = parsed_options.resv_level;
1053 if (parsed_options.dir_resv_level == -1)
1054 osb->osb_dir_resv_level = parsed_options.resv_level;
1055 else
1056 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1057
1058 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1059 if (status)
1060 goto read_super_error;
1061
1062 sb->s_magic = OCFS2_SUPER_MAGIC;
1063
1064 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1065 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1066
1067 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1068 * heartbeat=none */
1069 if (bdev_read_only(sb->s_bdev)) {
1070 if (!(sb->s_flags & MS_RDONLY)) {
1071 status = -EACCES;
1072 mlog(ML_ERROR, "Readonly device detected but readonly "
1073 "mount was not specified.\n");
1074 goto read_super_error;
1075 }
1076
1077 /* You should not be able to start a local heartbeat
1078 * on a readonly device. */
1079 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1080 status = -EROFS;
1081 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1082 "device.\n");
1083 goto read_super_error;
1084 }
1085
1086 status = ocfs2_check_journals_nolocks(osb);
1087 if (status < 0) {
1088 if (status == -EROFS)
1089 mlog(ML_ERROR, "Recovery required on readonly "
1090 "file system, but write access is "
1091 "unavailable.\n");
1092 else
1093 mlog_errno(status);
1094 goto read_super_error;
1095 }
1096
1097 ocfs2_set_ro_flag(osb, 1);
1098
1099 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1100 "Cluster services will not be used for this mount. "
1101 "Recovery will be skipped.\n", osb->dev_str);
1102 }
1103
1104 if (!ocfs2_is_hard_readonly(osb)) {
1105 if (sb->s_flags & MS_RDONLY)
1106 ocfs2_set_ro_flag(osb, 0);
1107 }
1108
1109 status = ocfs2_verify_heartbeat(osb);
1110 if (status < 0) {
1111 mlog_errno(status);
1112 goto read_super_error;
1113 }
1114
1115 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1116 ocfs2_debugfs_root);
1117 if (!osb->osb_debug_root) {
1118 status = -EINVAL;
1119 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1120 goto read_super_error;
1121 }
1122
1123 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1124 osb->osb_debug_root,
1125 osb,
1126 &ocfs2_osb_debug_fops);
1127 if (!osb->osb_ctxt) {
1128 status = -EINVAL;
1129 mlog_errno(status);
1130 goto read_super_error;
1131 }
1132
1133 if (ocfs2_meta_ecc(osb)) {
1134 status = ocfs2_blockcheck_stats_debugfs_install(
1135 &osb->osb_ecc_stats,
1136 osb->osb_debug_root);
1137 if (status) {
1138 mlog(ML_ERROR,
1139 "Unable to create blockcheck statistics "
1140 "files\n");
1141 goto read_super_error;
1142 }
1143 }
1144
1145 status = ocfs2_mount_volume(sb);
1146 if (status < 0)
1147 goto read_super_error;
1148
1149 if (osb->root_inode)
1150 inode = igrab(osb->root_inode);
1151
1152 if (!inode) {
1153 status = -EIO;
1154 mlog_errno(status);
1155 goto read_super_error;
1156 }
1157
1158 root = d_make_root(inode);
1159 if (!root) {
1160 status = -ENOMEM;
1161 mlog_errno(status);
1162 goto read_super_error;
1163 }
1164
1165 sb->s_root = root;
1166
1167 ocfs2_complete_mount_recovery(osb);
1168
1169 if (ocfs2_mount_local(osb))
1170 snprintf(nodestr, sizeof(nodestr), "local");
1171 else
1172 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1173
1174 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1175 "with %s data mode.\n",
1176 osb->dev_str, nodestr, osb->slot_num,
1177 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1178 "ordered");
1179
1180 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1181 wake_up(&osb->osb_mount_event);
1182
1183 /* Now we can initialize quotas because we can afford to wait
1184 * for cluster locks recovery now. That also means that truncation
1185 * log recovery can happen but that waits for proper quota setup */
1186 if (!(sb->s_flags & MS_RDONLY)) {
1187 status = ocfs2_enable_quotas(osb);
1188 if (status < 0) {
1189 /* We have to err-out specially here because
1190 * s_root is already set */
1191 mlog_errno(status);
1192 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1193 wake_up(&osb->osb_mount_event);
1194 return status;
1195 }
1196 }
1197
1198 ocfs2_complete_quota_recovery(osb);
1199
1200 /* Now we wake up again for processes waiting for quotas */
1201 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1202 wake_up(&osb->osb_mount_event);
1203
1204 /* Start this when the mount is almost sure of being successful */
1205 ocfs2_orphan_scan_start(osb);
1206
1207 return status;
1208
1209 read_super_error:
1210 brelse(bh);
1211
1212 if (osb) {
1213 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1214 wake_up(&osb->osb_mount_event);
1215 ocfs2_dismount_volume(sb, 1);
1216 }
1217
1218 if (status)
1219 mlog_errno(status);
1220 return status;
1221 }
1222
1223 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1224 int flags,
1225 const char *dev_name,
1226 void *data)
1227 {
1228 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1229 }
1230
1231 static struct file_system_type ocfs2_fs_type = {
1232 .owner = THIS_MODULE,
1233 .name = "ocfs2",
1234 .mount = ocfs2_mount,
1235 .kill_sb = kill_block_super,
1236 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1237 .next = NULL
1238 };
1239 MODULE_ALIAS_FS("ocfs2");
1240
1241 static int ocfs2_check_set_options(struct super_block *sb,
1242 struct mount_options *options)
1243 {
1244 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1245 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1246 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1247 mlog(ML_ERROR, "User quotas were requested, but this "
1248 "filesystem does not have the feature enabled.\n");
1249 return 0;
1250 }
1251 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1252 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1253 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1254 mlog(ML_ERROR, "Group quotas were requested, but this "
1255 "filesystem does not have the feature enabled.\n");
1256 return 0;
1257 }
1258 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1259 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1260 mlog(ML_ERROR, "ACL support requested but extended attributes "
1261 "feature is not enabled\n");
1262 return 0;
1263 }
1264 /* No ACL setting specified? Use XATTR feature... */
1265 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1266 OCFS2_MOUNT_NO_POSIX_ACL))) {
1267 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1268 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1269 else
1270 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1271 }
1272 return 1;
1273 }
1274
1275 static int ocfs2_parse_options(struct super_block *sb,
1276 char *options,
1277 struct mount_options *mopt,
1278 int is_remount)
1279 {
1280 int status, user_stack = 0;
1281 char *p;
1282 u32 tmp;
1283 int token, option;
1284 substring_t args[MAX_OPT_ARGS];
1285
1286 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1287
1288 mopt->commit_interval = 0;
1289 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1290 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1291 mopt->slot = OCFS2_INVALID_SLOT;
1292 mopt->localalloc_opt = -1;
1293 mopt->cluster_stack[0] = '\0';
1294 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1295 mopt->dir_resv_level = -1;
1296
1297 if (!options) {
1298 status = 1;
1299 goto bail;
1300 }
1301
1302 while ((p = strsep(&options, ",")) != NULL) {
1303 if (!*p)
1304 continue;
1305
1306 token = match_token(p, tokens, args);
1307 switch (token) {
1308 case Opt_hb_local:
1309 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1310 break;
1311 case Opt_hb_none:
1312 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1313 break;
1314 case Opt_hb_global:
1315 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1316 break;
1317 case Opt_barrier:
1318 if (match_int(&args[0], &option)) {
1319 status = 0;
1320 goto bail;
1321 }
1322 if (option)
1323 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1324 else
1325 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1326 break;
1327 case Opt_intr:
1328 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1329 break;
1330 case Opt_nointr:
1331 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1332 break;
1333 case Opt_err_panic:
1334 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1335 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1336 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1337 break;
1338 case Opt_err_ro:
1339 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1340 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1341 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1342 break;
1343 case Opt_err_cont:
1344 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1345 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1346 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1347 break;
1348 case Opt_data_ordered:
1349 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1350 break;
1351 case Opt_data_writeback:
1352 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1353 break;
1354 case Opt_user_xattr:
1355 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1356 break;
1357 case Opt_nouser_xattr:
1358 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1359 break;
1360 case Opt_atime_quantum:
1361 if (match_int(&args[0], &option)) {
1362 status = 0;
1363 goto bail;
1364 }
1365 if (option >= 0)
1366 mopt->atime_quantum = option;
1367 break;
1368 case Opt_slot:
1369 if (match_int(&args[0], &option)) {
1370 status = 0;
1371 goto bail;
1372 }
1373 if (option)
1374 mopt->slot = (s16)option;
1375 break;
1376 case Opt_commit:
1377 if (match_int(&args[0], &option)) {
1378 status = 0;
1379 goto bail;
1380 }
1381 if (option < 0)
1382 return 0;
1383 if (option == 0)
1384 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1385 mopt->commit_interval = HZ * option;
1386 break;
1387 case Opt_localalloc:
1388 if (match_int(&args[0], &option)) {
1389 status = 0;
1390 goto bail;
1391 }
1392 if (option >= 0)
1393 mopt->localalloc_opt = option;
1394 break;
1395 case Opt_localflocks:
1396 /*
1397 * Changing this during remount could race
1398 * flock() requests, or "unbalance" existing
1399 * ones (e.g., a lock is taken in one mode but
1400 * dropped in the other). If users care enough
1401 * to flip locking modes during remount, we
1402 * could add a "local" flag to individual
1403 * flock structures for proper tracking of
1404 * state.
1405 */
1406 if (!is_remount)
1407 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1408 break;
1409 case Opt_stack:
1410 /* Check both that the option we were passed
1411 * is of the right length and that it is a proper
1412 * string of the right length.
1413 */
1414 if (((args[0].to - args[0].from) !=
1415 OCFS2_STACK_LABEL_LEN) ||
1416 (strnlen(args[0].from,
1417 OCFS2_STACK_LABEL_LEN) !=
1418 OCFS2_STACK_LABEL_LEN)) {
1419 mlog(ML_ERROR,
1420 "Invalid cluster_stack option\n");
1421 status = 0;
1422 goto bail;
1423 }
1424 memcpy(mopt->cluster_stack, args[0].from,
1425 OCFS2_STACK_LABEL_LEN);
1426 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1427 /*
1428 * Open code the memcmp here as we don't have
1429 * an osb to pass to
1430 * ocfs2_userspace_stack().
1431 */
1432 if (memcmp(mopt->cluster_stack,
1433 OCFS2_CLASSIC_CLUSTER_STACK,
1434 OCFS2_STACK_LABEL_LEN))
1435 user_stack = 1;
1436 break;
1437 case Opt_inode64:
1438 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1439 break;
1440 case Opt_usrquota:
1441 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1442 break;
1443 case Opt_grpquota:
1444 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1445 break;
1446 case Opt_coherency_buffered:
1447 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1448 break;
1449 case Opt_coherency_full:
1450 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1451 break;
1452 case Opt_acl:
1453 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1454 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1455 break;
1456 case Opt_noacl:
1457 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1458 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1459 break;
1460 case Opt_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->resv_level = option;
1470 break;
1471 case Opt_dir_resv_level:
1472 if (is_remount)
1473 break;
1474 if (match_int(&args[0], &option)) {
1475 status = 0;
1476 goto bail;
1477 }
1478 if (option >= OCFS2_MIN_RESV_LEVEL &&
1479 option < OCFS2_MAX_RESV_LEVEL)
1480 mopt->dir_resv_level = option;
1481 break;
1482 case Opt_journal_async_commit:
1483 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1484 break;
1485 default:
1486 mlog(ML_ERROR,
1487 "Unrecognized mount option \"%s\" "
1488 "or missing value\n", p);
1489 status = 0;
1490 goto bail;
1491 }
1492 }
1493
1494 if (user_stack == 0) {
1495 /* Ensure only one heartbeat mode */
1496 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1497 OCFS2_MOUNT_HB_GLOBAL |
1498 OCFS2_MOUNT_HB_NONE);
1499 if (hweight32(tmp) != 1) {
1500 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1501 status = 0;
1502 goto bail;
1503 }
1504 }
1505
1506 status = 1;
1507
1508 bail:
1509 return status;
1510 }
1511
1512 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1513 {
1514 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1515 unsigned long opts = osb->s_mount_opt;
1516 unsigned int local_alloc_megs;
1517
1518 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1519 seq_printf(s, ",_netdev");
1520 if (opts & OCFS2_MOUNT_HB_LOCAL)
1521 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1522 else
1523 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1524 } else
1525 seq_printf(s, ",%s", OCFS2_HB_NONE);
1526
1527 if (opts & OCFS2_MOUNT_NOINTR)
1528 seq_printf(s, ",nointr");
1529
1530 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1531 seq_printf(s, ",data=writeback");
1532 else
1533 seq_printf(s, ",data=ordered");
1534
1535 if (opts & OCFS2_MOUNT_BARRIER)
1536 seq_printf(s, ",barrier=1");
1537
1538 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1539 seq_printf(s, ",errors=panic");
1540 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1541 seq_printf(s, ",errors=continue");
1542 else
1543 seq_printf(s, ",errors=remount-ro");
1544
1545 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1546 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1547
1548 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1549
1550 if (osb->osb_commit_interval)
1551 seq_printf(s, ",commit=%u",
1552 (unsigned) (osb->osb_commit_interval / HZ));
1553
1554 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1555 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1556 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1557
1558 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1559 seq_printf(s, ",localflocks,");
1560
1561 if (osb->osb_cluster_stack[0])
1562 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1563 OCFS2_STACK_LABEL_LEN);
1564 if (opts & OCFS2_MOUNT_USRQUOTA)
1565 seq_printf(s, ",usrquota");
1566 if (opts & OCFS2_MOUNT_GRPQUOTA)
1567 seq_printf(s, ",grpquota");
1568
1569 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1570 seq_printf(s, ",coherency=buffered");
1571 else
1572 seq_printf(s, ",coherency=full");
1573
1574 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1575 seq_printf(s, ",nouser_xattr");
1576 else
1577 seq_printf(s, ",user_xattr");
1578
1579 if (opts & OCFS2_MOUNT_INODE64)
1580 seq_printf(s, ",inode64");
1581
1582 if (opts & OCFS2_MOUNT_POSIX_ACL)
1583 seq_printf(s, ",acl");
1584 else
1585 seq_printf(s, ",noacl");
1586
1587 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1588 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1589
1590 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1591 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1592
1593 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1594 seq_printf(s, ",journal_async_commit");
1595
1596 return 0;
1597 }
1598
1599 static int __init ocfs2_init(void)
1600 {
1601 int status;
1602
1603 status = init_ocfs2_uptodate_cache();
1604 if (status < 0)
1605 goto out1;
1606
1607 status = ocfs2_initialize_mem_caches();
1608 if (status < 0)
1609 goto out2;
1610
1611 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1612 if (!ocfs2_wq) {
1613 status = -ENOMEM;
1614 goto out3;
1615 }
1616
1617 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1618 if (!ocfs2_debugfs_root) {
1619 status = -ENOMEM;
1620 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1621 goto out4;
1622 }
1623
1624 ocfs2_set_locking_protocol();
1625
1626 status = register_quota_format(&ocfs2_quota_format);
1627 if (status < 0)
1628 goto out4;
1629 status = register_filesystem(&ocfs2_fs_type);
1630 if (!status)
1631 return 0;
1632
1633 unregister_quota_format(&ocfs2_quota_format);
1634 out4:
1635 destroy_workqueue(ocfs2_wq);
1636 debugfs_remove(ocfs2_debugfs_root);
1637 out3:
1638 ocfs2_free_mem_caches();
1639 out2:
1640 exit_ocfs2_uptodate_cache();
1641 out1:
1642 mlog_errno(status);
1643 return status;
1644 }
1645
1646 static void __exit ocfs2_exit(void)
1647 {
1648 if (ocfs2_wq) {
1649 flush_workqueue(ocfs2_wq);
1650 destroy_workqueue(ocfs2_wq);
1651 }
1652
1653 unregister_quota_format(&ocfs2_quota_format);
1654
1655 debugfs_remove(ocfs2_debugfs_root);
1656
1657 ocfs2_free_mem_caches();
1658
1659 unregister_filesystem(&ocfs2_fs_type);
1660
1661 exit_ocfs2_uptodate_cache();
1662 }
1663
1664 static void ocfs2_put_super(struct super_block *sb)
1665 {
1666 trace_ocfs2_put_super(sb);
1667
1668 ocfs2_sync_blockdev(sb);
1669 ocfs2_dismount_volume(sb, 0);
1670 }
1671
1672 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1673 {
1674 struct ocfs2_super *osb;
1675 u32 numbits, freebits;
1676 int status;
1677 struct ocfs2_dinode *bm_lock;
1678 struct buffer_head *bh = NULL;
1679 struct inode *inode = NULL;
1680
1681 trace_ocfs2_statfs(dentry->d_sb, buf);
1682
1683 osb = OCFS2_SB(dentry->d_sb);
1684
1685 inode = ocfs2_get_system_file_inode(osb,
1686 GLOBAL_BITMAP_SYSTEM_INODE,
1687 OCFS2_INVALID_SLOT);
1688 if (!inode) {
1689 mlog(ML_ERROR, "failed to get bitmap inode\n");
1690 status = -EIO;
1691 goto bail;
1692 }
1693
1694 status = ocfs2_inode_lock(inode, &bh, 0);
1695 if (status < 0) {
1696 mlog_errno(status);
1697 goto bail;
1698 }
1699
1700 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1701
1702 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1703 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1704
1705 buf->f_type = OCFS2_SUPER_MAGIC;
1706 buf->f_bsize = dentry->d_sb->s_blocksize;
1707 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1708 buf->f_blocks = ((sector_t) numbits) *
1709 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1710 buf->f_bfree = ((sector_t) freebits) *
1711 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1712 buf->f_bavail = buf->f_bfree;
1713 buf->f_files = numbits;
1714 buf->f_ffree = freebits;
1715 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1716 & 0xFFFFFFFFUL;
1717 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1718 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1719
1720 brelse(bh);
1721
1722 ocfs2_inode_unlock(inode, 0);
1723 status = 0;
1724 bail:
1725 iput(inode);
1726
1727 if (status)
1728 mlog_errno(status);
1729
1730 return status;
1731 }
1732
1733 static void ocfs2_inode_init_once(void *data)
1734 {
1735 struct ocfs2_inode_info *oi = data;
1736
1737 oi->ip_flags = 0;
1738 oi->ip_open_count = 0;
1739 spin_lock_init(&oi->ip_lock);
1740 ocfs2_extent_map_init(&oi->vfs_inode);
1741 INIT_LIST_HEAD(&oi->ip_io_markers);
1742 oi->ip_dir_start_lookup = 0;
1743 mutex_init(&oi->ip_unaligned_aio);
1744 init_rwsem(&oi->ip_alloc_sem);
1745 init_rwsem(&oi->ip_xattr_sem);
1746 mutex_init(&oi->ip_io_mutex);
1747
1748 oi->ip_blkno = 0ULL;
1749 oi->ip_clusters = 0;
1750
1751 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1752
1753 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1754 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1755 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1756
1757 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1758 &ocfs2_inode_caching_ops);
1759
1760 inode_init_once(&oi->vfs_inode);
1761 }
1762
1763 static int ocfs2_initialize_mem_caches(void)
1764 {
1765 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1766 sizeof(struct ocfs2_inode_info),
1767 0,
1768 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1769 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1770 ocfs2_inode_init_once);
1771 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1772 sizeof(struct ocfs2_dquot),
1773 0,
1774 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1775 SLAB_MEM_SPREAD),
1776 NULL);
1777 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1778 sizeof(struct ocfs2_quota_chunk),
1779 0,
1780 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1781 NULL);
1782 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1783 !ocfs2_qf_chunk_cachep) {
1784 if (ocfs2_inode_cachep)
1785 kmem_cache_destroy(ocfs2_inode_cachep);
1786 if (ocfs2_dquot_cachep)
1787 kmem_cache_destroy(ocfs2_dquot_cachep);
1788 if (ocfs2_qf_chunk_cachep)
1789 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1790 return -ENOMEM;
1791 }
1792
1793 return 0;
1794 }
1795
1796 static void ocfs2_free_mem_caches(void)
1797 {
1798 /*
1799 * Make sure all delayed rcu free inodes are flushed before we
1800 * destroy cache.
1801 */
1802 rcu_barrier();
1803 if (ocfs2_inode_cachep)
1804 kmem_cache_destroy(ocfs2_inode_cachep);
1805 ocfs2_inode_cachep = NULL;
1806
1807 if (ocfs2_dquot_cachep)
1808 kmem_cache_destroy(ocfs2_dquot_cachep);
1809 ocfs2_dquot_cachep = NULL;
1810
1811 if (ocfs2_qf_chunk_cachep)
1812 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1813 ocfs2_qf_chunk_cachep = NULL;
1814 }
1815
1816 static int ocfs2_get_sector(struct super_block *sb,
1817 struct buffer_head **bh,
1818 int block,
1819 int sect_size)
1820 {
1821 if (!sb_set_blocksize(sb, sect_size)) {
1822 mlog(ML_ERROR, "unable to set blocksize\n");
1823 return -EIO;
1824 }
1825
1826 *bh = sb_getblk(sb, block);
1827 if (!*bh) {
1828 mlog_errno(-ENOMEM);
1829 return -ENOMEM;
1830 }
1831 lock_buffer(*bh);
1832 if (!buffer_dirty(*bh))
1833 clear_buffer_uptodate(*bh);
1834 unlock_buffer(*bh);
1835 ll_rw_block(READ, 1, bh);
1836 wait_on_buffer(*bh);
1837 if (!buffer_uptodate(*bh)) {
1838 mlog_errno(-EIO);
1839 brelse(*bh);
1840 *bh = NULL;
1841 return -EIO;
1842 }
1843
1844 return 0;
1845 }
1846
1847 static int ocfs2_mount_volume(struct super_block *sb)
1848 {
1849 int status = 0;
1850 int unlock_super = 0;
1851 struct ocfs2_super *osb = OCFS2_SB(sb);
1852
1853 if (ocfs2_is_hard_readonly(osb))
1854 goto leave;
1855
1856 status = ocfs2_dlm_init(osb);
1857 if (status < 0) {
1858 mlog_errno(status);
1859 goto leave;
1860 }
1861
1862 status = ocfs2_super_lock(osb, 1);
1863 if (status < 0) {
1864 mlog_errno(status);
1865 goto leave;
1866 }
1867 unlock_super = 1;
1868
1869 /* This will load up the node map and add ourselves to it. */
1870 status = ocfs2_find_slot(osb);
1871 if (status < 0) {
1872 mlog_errno(status);
1873 goto leave;
1874 }
1875
1876 /* load all node-local system inodes */
1877 status = ocfs2_init_local_system_inodes(osb);
1878 if (status < 0) {
1879 mlog_errno(status);
1880 goto leave;
1881 }
1882
1883 status = ocfs2_check_volume(osb);
1884 if (status < 0) {
1885 mlog_errno(status);
1886 goto leave;
1887 }
1888
1889 status = ocfs2_truncate_log_init(osb);
1890 if (status < 0)
1891 mlog_errno(status);
1892
1893 leave:
1894 if (unlock_super)
1895 ocfs2_super_unlock(osb, 1);
1896
1897 return status;
1898 }
1899
1900 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1901 {
1902 int tmp, hangup_needed = 0;
1903 struct ocfs2_super *osb = NULL;
1904 char nodestr[12];
1905
1906 trace_ocfs2_dismount_volume(sb);
1907
1908 BUG_ON(!sb);
1909 osb = OCFS2_SB(sb);
1910 BUG_ON(!osb);
1911
1912 debugfs_remove(osb->osb_ctxt);
1913
1914 /* Orphan scan should be stopped as early as possible */
1915 ocfs2_orphan_scan_stop(osb);
1916
1917 ocfs2_disable_quotas(osb);
1918
1919 /* All dquots should be freed by now */
1920 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1921 /* Wait for worker to be done with the work structure in osb */
1922 cancel_work_sync(&osb->dquot_drop_work);
1923
1924 ocfs2_shutdown_local_alloc(osb);
1925
1926 ocfs2_truncate_log_shutdown(osb);
1927
1928 /* This will disable recovery and flush any recovery work. */
1929 ocfs2_recovery_exit(osb);
1930
1931 ocfs2_journal_shutdown(osb);
1932
1933 ocfs2_sync_blockdev(sb);
1934
1935 ocfs2_purge_refcount_trees(osb);
1936
1937 /* No cluster connection means we've failed during mount, so skip
1938 * all the steps which depended on that to complete. */
1939 if (osb->cconn) {
1940 tmp = ocfs2_super_lock(osb, 1);
1941 if (tmp < 0) {
1942 mlog_errno(tmp);
1943 return;
1944 }
1945 }
1946
1947 if (osb->slot_num != OCFS2_INVALID_SLOT)
1948 ocfs2_put_slot(osb);
1949
1950 if (osb->cconn)
1951 ocfs2_super_unlock(osb, 1);
1952
1953 ocfs2_release_system_inodes(osb);
1954
1955 /*
1956 * If we're dismounting due to mount error, mount.ocfs2 will clean
1957 * up heartbeat. If we're a local mount, there is no heartbeat.
1958 * If we failed before we got a uuid_str yet, we can't stop
1959 * heartbeat. Otherwise, do it.
1960 */
1961 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1962 !ocfs2_is_hard_readonly(osb))
1963 hangup_needed = 1;
1964
1965 if (osb->cconn)
1966 ocfs2_dlm_shutdown(osb, hangup_needed);
1967
1968 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1969 debugfs_remove(osb->osb_debug_root);
1970
1971 if (hangup_needed)
1972 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1973
1974 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1975
1976 if (ocfs2_mount_local(osb))
1977 snprintf(nodestr, sizeof(nodestr), "local");
1978 else
1979 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1980
1981 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1982 osb->dev_str, nodestr);
1983
1984 ocfs2_delete_osb(osb);
1985 kfree(osb);
1986 sb->s_dev = 0;
1987 sb->s_fs_info = NULL;
1988 }
1989
1990 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1991 unsigned uuid_bytes)
1992 {
1993 int i, ret;
1994 char *ptr;
1995
1996 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1997
1998 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1999 if (osb->uuid_str == NULL)
2000 return -ENOMEM;
2001
2002 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2003 /* print with null */
2004 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2005 if (ret != 2) /* drop super cleans up */
2006 return -EINVAL;
2007 /* then only advance past the last char */
2008 ptr += 2;
2009 }
2010
2011 return 0;
2012 }
2013
2014 /* Make sure entire volume is addressable by our journal. Requires
2015 osb_clusters_at_boot to be valid and for the journal to have been
2016 initialized by ocfs2_journal_init(). */
2017 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2018 {
2019 int status = 0;
2020 u64 max_block =
2021 ocfs2_clusters_to_blocks(osb->sb,
2022 osb->osb_clusters_at_boot) - 1;
2023
2024 /* 32-bit block number is always OK. */
2025 if (max_block <= (u32)~0ULL)
2026 goto out;
2027
2028 /* Volume is "huge", so see if our journal is new enough to
2029 support it. */
2030 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2031 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2032 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2033 JBD2_FEATURE_INCOMPAT_64BIT))) {
2034 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2035 "Enable the 'block64' journal option with tunefs.ocfs2");
2036 status = -EFBIG;
2037 goto out;
2038 }
2039
2040 out:
2041 return status;
2042 }
2043
2044 static int ocfs2_initialize_super(struct super_block *sb,
2045 struct buffer_head *bh,
2046 int sector_size,
2047 struct ocfs2_blockcheck_stats *stats)
2048 {
2049 int status;
2050 int i, cbits, bbits;
2051 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2052 struct inode *inode = NULL;
2053 struct ocfs2_journal *journal;
2054 struct ocfs2_super *osb;
2055 u64 total_blocks;
2056
2057 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2058 if (!osb) {
2059 status = -ENOMEM;
2060 mlog_errno(status);
2061 goto bail;
2062 }
2063
2064 sb->s_fs_info = osb;
2065 sb->s_op = &ocfs2_sops;
2066 sb->s_d_op = &ocfs2_dentry_ops;
2067 sb->s_export_op = &ocfs2_export_ops;
2068 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2069 sb->dq_op = &ocfs2_quota_operations;
2070 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2071 sb->s_xattr = ocfs2_xattr_handlers;
2072 sb->s_time_gran = 1;
2073 sb->s_flags |= MS_NOATIME;
2074 /* this is needed to support O_LARGEFILE */
2075 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2076 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2077 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2078 memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
2079 sizeof(di->id2.i_super.s_uuid));
2080
2081 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2082
2083 for (i = 0; i < 3; i++)
2084 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2085 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2086
2087 osb->sb = sb;
2088 /* Save off for ocfs2_rw_direct */
2089 osb->s_sectsize_bits = blksize_bits(sector_size);
2090 BUG_ON(!osb->s_sectsize_bits);
2091
2092 spin_lock_init(&osb->dc_task_lock);
2093 init_waitqueue_head(&osb->dc_event);
2094 osb->dc_work_sequence = 0;
2095 osb->dc_wake_sequence = 0;
2096 INIT_LIST_HEAD(&osb->blocked_lock_list);
2097 osb->blocked_lock_count = 0;
2098 spin_lock_init(&osb->osb_lock);
2099 spin_lock_init(&osb->osb_xattr_lock);
2100 ocfs2_init_steal_slots(osb);
2101
2102 mutex_init(&osb->system_file_mutex);
2103
2104 atomic_set(&osb->alloc_stats.moves, 0);
2105 atomic_set(&osb->alloc_stats.local_data, 0);
2106 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2107 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2108 atomic_set(&osb->alloc_stats.bg_extends, 0);
2109
2110 /* Copy the blockcheck stats from the superblock probe */
2111 osb->osb_ecc_stats = *stats;
2112
2113 ocfs2_init_node_maps(osb);
2114
2115 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2116 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2117
2118 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2119 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2120 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2121 osb->max_slots);
2122 status = -EINVAL;
2123 goto bail;
2124 }
2125
2126 ocfs2_orphan_scan_init(osb);
2127
2128 status = ocfs2_recovery_init(osb);
2129 if (status) {
2130 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2131 mlog_errno(status);
2132 goto bail;
2133 }
2134
2135 init_waitqueue_head(&osb->checkpoint_event);
2136
2137 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2138
2139 osb->slot_num = OCFS2_INVALID_SLOT;
2140
2141 osb->s_xattr_inline_size = le16_to_cpu(
2142 di->id2.i_super.s_xattr_inline_size);
2143
2144 osb->local_alloc_state = OCFS2_LA_UNUSED;
2145 osb->local_alloc_bh = NULL;
2146 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2147
2148 init_waitqueue_head(&osb->osb_mount_event);
2149
2150 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2151 if (status) {
2152 mlog_errno(status);
2153 goto bail;
2154 }
2155
2156 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2157 if (!osb->vol_label) {
2158 mlog(ML_ERROR, "unable to alloc vol label\n");
2159 status = -ENOMEM;
2160 goto bail;
2161 }
2162
2163 osb->slot_recovery_generations =
2164 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2165 GFP_KERNEL);
2166 if (!osb->slot_recovery_generations) {
2167 status = -ENOMEM;
2168 mlog_errno(status);
2169 goto bail;
2170 }
2171
2172 init_waitqueue_head(&osb->osb_wipe_event);
2173 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2174 sizeof(*osb->osb_orphan_wipes),
2175 GFP_KERNEL);
2176 if (!osb->osb_orphan_wipes) {
2177 status = -ENOMEM;
2178 mlog_errno(status);
2179 goto bail;
2180 }
2181
2182 osb->osb_rf_lock_tree = RB_ROOT;
2183
2184 osb->s_feature_compat =
2185 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2186 osb->s_feature_ro_compat =
2187 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2188 osb->s_feature_incompat =
2189 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2190
2191 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2192 mlog(ML_ERROR, "couldn't mount because of unsupported "
2193 "optional features (%x).\n", i);
2194 status = -EINVAL;
2195 goto bail;
2196 }
2197 if (!(osb->sb->s_flags & MS_RDONLY) &&
2198 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2199 mlog(ML_ERROR, "couldn't mount RDWR because of "
2200 "unsupported optional features (%x).\n", i);
2201 status = -EINVAL;
2202 goto bail;
2203 }
2204
2205 if (ocfs2_clusterinfo_valid(osb)) {
2206 osb->osb_stackflags =
2207 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2208 strlcpy(osb->osb_cluster_stack,
2209 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2210 OCFS2_STACK_LABEL_LEN + 1);
2211 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2212 mlog(ML_ERROR,
2213 "couldn't mount because of an invalid "
2214 "cluster stack label (%s) \n",
2215 osb->osb_cluster_stack);
2216 status = -EINVAL;
2217 goto bail;
2218 }
2219 strlcpy(osb->osb_cluster_name,
2220 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2221 OCFS2_CLUSTER_NAME_LEN + 1);
2222 } else {
2223 /* The empty string is identical with classic tools that
2224 * don't know about s_cluster_info. */
2225 osb->osb_cluster_stack[0] = '\0';
2226 }
2227
2228 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2229
2230 /* FIXME
2231 * This should be done in ocfs2_journal_init(), but unknown
2232 * ordering issues will cause the filesystem to crash.
2233 * If anyone wants to figure out what part of the code
2234 * refers to osb->journal before ocfs2_journal_init() is run,
2235 * be my guest.
2236 */
2237 /* initialize our journal structure */
2238
2239 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2240 if (!journal) {
2241 mlog(ML_ERROR, "unable to alloc journal\n");
2242 status = -ENOMEM;
2243 goto bail;
2244 }
2245 osb->journal = journal;
2246 journal->j_osb = osb;
2247
2248 atomic_set(&journal->j_num_trans, 0);
2249 init_rwsem(&journal->j_trans_barrier);
2250 init_waitqueue_head(&journal->j_checkpointed);
2251 spin_lock_init(&journal->j_lock);
2252 journal->j_trans_id = (unsigned long) 1;
2253 INIT_LIST_HEAD(&journal->j_la_cleanups);
2254 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2255 journal->j_state = OCFS2_JOURNAL_FREE;
2256
2257 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2258 init_llist_head(&osb->dquot_drop_list);
2259
2260 /* get some pseudo constants for clustersize bits */
2261 osb->s_clustersize_bits =
2262 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2263 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2264
2265 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2266 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2267 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2268 osb->s_clustersize);
2269 status = -EINVAL;
2270 goto bail;
2271 }
2272
2273 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2274 le32_to_cpu(di->i_clusters));
2275
2276 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2277 total_blocks);
2278 if (status) {
2279 mlog(ML_ERROR, "Volume too large "
2280 "to mount safely on this system");
2281 status = -EFBIG;
2282 goto bail;
2283 }
2284
2285 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2286 sizeof(di->id2.i_super.s_uuid))) {
2287 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2288 status = -ENOMEM;
2289 goto bail;
2290 }
2291
2292 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2293 OCFS2_MAX_VOL_LABEL_LEN);
2294 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2295 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2296 osb->first_cluster_group_blkno =
2297 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2298 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2299 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2300 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2301 (unsigned long long)osb->root_blkno,
2302 (unsigned long long)osb->system_dir_blkno,
2303 osb->s_clustersize_bits);
2304
2305 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2306 if (!osb->osb_dlm_debug) {
2307 status = -ENOMEM;
2308 mlog_errno(status);
2309 goto bail;
2310 }
2311
2312 atomic_set(&osb->vol_state, VOLUME_INIT);
2313
2314 /* load root, system_dir, and all global system inodes */
2315 status = ocfs2_init_global_system_inodes(osb);
2316 if (status < 0) {
2317 mlog_errno(status);
2318 goto bail;
2319 }
2320
2321 /*
2322 * global bitmap
2323 */
2324 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2325 OCFS2_INVALID_SLOT);
2326 if (!inode) {
2327 status = -EINVAL;
2328 mlog_errno(status);
2329 goto bail;
2330 }
2331
2332 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2333 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2334 iput(inode);
2335
2336 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2337 osb->s_feature_incompat) * 8;
2338
2339 status = ocfs2_init_slot_info(osb);
2340 if (status < 0) {
2341 mlog_errno(status);
2342 goto bail;
2343 }
2344 cleancache_init_shared_fs(sb);
2345
2346 bail:
2347 return status;
2348 }
2349
2350 /*
2351 * will return: -EAGAIN if it is ok to keep searching for superblocks
2352 * -EINVAL if there is a bad superblock
2353 * 0 on success
2354 */
2355 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2356 struct buffer_head *bh,
2357 u32 blksz,
2358 struct ocfs2_blockcheck_stats *stats)
2359 {
2360 int status = -EAGAIN;
2361
2362 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2363 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2364 /* We have to do a raw check of the feature here */
2365 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2366 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2367 status = ocfs2_block_check_validate(bh->b_data,
2368 bh->b_size,
2369 &di->i_check,
2370 stats);
2371 if (status)
2372 goto out;
2373 }
2374 status = -EINVAL;
2375 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2376 mlog(ML_ERROR, "found superblock with incorrect block "
2377 "size: found %u, should be %u\n",
2378 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2379 blksz);
2380 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2381 OCFS2_MAJOR_REV_LEVEL ||
2382 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2383 OCFS2_MINOR_REV_LEVEL) {
2384 mlog(ML_ERROR, "found superblock with bad version: "
2385 "found %u.%u, should be %u.%u\n",
2386 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2387 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2388 OCFS2_MAJOR_REV_LEVEL,
2389 OCFS2_MINOR_REV_LEVEL);
2390 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2391 mlog(ML_ERROR, "bad block number on superblock: "
2392 "found %llu, should be %llu\n",
2393 (unsigned long long)le64_to_cpu(di->i_blkno),
2394 (unsigned long long)bh->b_blocknr);
2395 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2396 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2397 mlog(ML_ERROR, "bad cluster size found: %u\n",
2398 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2399 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2400 mlog(ML_ERROR, "bad root_blkno: 0\n");
2401 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2402 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2403 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2404 mlog(ML_ERROR,
2405 "Superblock slots found greater than file system "
2406 "maximum: found %u, max %u\n",
2407 le16_to_cpu(di->id2.i_super.s_max_slots),
2408 OCFS2_MAX_SLOTS);
2409 } else {
2410 /* found it! */
2411 status = 0;
2412 }
2413 }
2414
2415 out:
2416 if (status && status != -EAGAIN)
2417 mlog_errno(status);
2418 return status;
2419 }
2420
2421 static int ocfs2_check_volume(struct ocfs2_super *osb)
2422 {
2423 int status;
2424 int dirty;
2425 int local;
2426 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2427 * recover
2428 * ourselves. */
2429
2430 /* Init our journal object. */
2431 status = ocfs2_journal_init(osb->journal, &dirty);
2432 if (status < 0) {
2433 mlog(ML_ERROR, "Could not initialize journal!\n");
2434 goto finally;
2435 }
2436
2437 /* Now that journal has been initialized, check to make sure
2438 entire volume is addressable. */
2439 status = ocfs2_journal_addressable(osb);
2440 if (status)
2441 goto finally;
2442
2443 /* If the journal was unmounted cleanly then we don't want to
2444 * recover anything. Otherwise, journal_load will do that
2445 * dirty work for us :) */
2446 if (!dirty) {
2447 status = ocfs2_journal_wipe(osb->journal, 0);
2448 if (status < 0) {
2449 mlog_errno(status);
2450 goto finally;
2451 }
2452 } else {
2453 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2454 "unmounted cleanly, recovering it.\n", osb->dev_str);
2455 }
2456
2457 local = ocfs2_mount_local(osb);
2458
2459 /* will play back anything left in the journal. */
2460 status = ocfs2_journal_load(osb->journal, local, dirty);
2461 if (status < 0) {
2462 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2463 goto finally;
2464 }
2465
2466 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2467 jbd2_journal_set_features(osb->journal->j_journal,
2468 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2469 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2470 else
2471 jbd2_journal_clear_features(osb->journal->j_journal,
2472 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2473 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2474
2475 if (dirty) {
2476 /* recover my local alloc if we didn't unmount cleanly. */
2477 status = ocfs2_begin_local_alloc_recovery(osb,
2478 osb->slot_num,
2479 &local_alloc);
2480 if (status < 0) {
2481 mlog_errno(status);
2482 goto finally;
2483 }
2484 /* we complete the recovery process after we've marked
2485 * ourselves as mounted. */
2486 }
2487
2488 status = ocfs2_load_local_alloc(osb);
2489 if (status < 0) {
2490 mlog_errno(status);
2491 goto finally;
2492 }
2493
2494 if (dirty) {
2495 /* Recovery will be completed after we've mounted the
2496 * rest of the volume. */
2497 osb->dirty = 1;
2498 osb->local_alloc_copy = local_alloc;
2499 local_alloc = NULL;
2500 }
2501
2502 /* go through each journal, trylock it and if you get the
2503 * lock, and it's marked as dirty, set the bit in the recover
2504 * map and launch a recovery thread for it. */
2505 status = ocfs2_mark_dead_nodes(osb);
2506 if (status < 0) {
2507 mlog_errno(status);
2508 goto finally;
2509 }
2510
2511 status = ocfs2_compute_replay_slots(osb);
2512 if (status < 0)
2513 mlog_errno(status);
2514
2515 finally:
2516 kfree(local_alloc);
2517
2518 if (status)
2519 mlog_errno(status);
2520 return status;
2521 }
2522
2523 /*
2524 * The routine gets called from dismount or close whenever a dismount on
2525 * volume is requested and the osb open count becomes 1.
2526 * It will remove the osb from the global list and also free up all the
2527 * initialized resources and fileobject.
2528 */
2529 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2530 {
2531 /* This function assumes that the caller has the main osb resource */
2532
2533 ocfs2_free_slot_info(osb);
2534
2535 kfree(osb->osb_orphan_wipes);
2536 kfree(osb->slot_recovery_generations);
2537 /* FIXME
2538 * This belongs in journal shutdown, but because we have to
2539 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2540 * we free it here.
2541 */
2542 kfree(osb->journal);
2543 kfree(osb->local_alloc_copy);
2544 kfree(osb->uuid_str);
2545 kfree(osb->vol_label);
2546 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2547 memset(osb, 0, sizeof(struct ocfs2_super));
2548 }
2549
2550 /* Depending on the mount option passed, perform one of the following:
2551 * Put OCFS2 into a readonly state (default)
2552 * Return EIO so that only the process errs
2553 * Fix the error as if fsck.ocfs2 -y
2554 * panic
2555 */
2556 static int ocfs2_handle_error(struct super_block *sb)
2557 {
2558 struct ocfs2_super *osb = OCFS2_SB(sb);
2559 int rv = 0;
2560
2561 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2562 pr_crit("On-disk corruption discovered. "
2563 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2564
2565 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2566 panic("OCFS2: (device %s): panic forced after error\n",
2567 sb->s_id);
2568 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2569 pr_crit("OCFS2: Returning error to the calling process.\n");
2570 rv = -EIO;
2571 } else { /* default option */
2572 rv = -EROFS;
2573 if (sb->s_flags & MS_RDONLY &&
2574 (ocfs2_is_soft_readonly(osb) ||
2575 ocfs2_is_hard_readonly(osb)))
2576 return rv;
2577
2578 pr_crit("OCFS2: File system is now read-only.\n");
2579 sb->s_flags |= MS_RDONLY;
2580 ocfs2_set_ro_flag(osb, 0);
2581 }
2582
2583 return rv;
2584 }
2585
2586 int __ocfs2_error(struct super_block *sb, const char *function,
2587 const char *fmt, ...)
2588 {
2589 struct va_format vaf;
2590 va_list args;
2591
2592 va_start(args, fmt);
2593 vaf.fmt = fmt;
2594 vaf.va = &args;
2595
2596 /* Not using mlog here because we want to show the actual
2597 * function the error came from. */
2598 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2599 sb->s_id, function, &vaf);
2600
2601 va_end(args);
2602
2603 return ocfs2_handle_error(sb);
2604 }
2605
2606 /* Handle critical errors. This is intentionally more drastic than
2607 * ocfs2_handle_error, so we only use for things like journal errors,
2608 * etc. */
2609 void __ocfs2_abort(struct super_block *sb, const char *function,
2610 const char *fmt, ...)
2611 {
2612 struct va_format vaf;
2613 va_list args;
2614
2615 va_start(args, fmt);
2616
2617 vaf.fmt = fmt;
2618 vaf.va = &args;
2619
2620 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2621 sb->s_id, function, &vaf);
2622
2623 va_end(args);
2624
2625 /* We don't have the cluster support yet to go straight to
2626 * hard readonly in here. Until then, we want to keep
2627 * ocfs2_abort() so that we can at least mark critical
2628 * errors.
2629 *
2630 * TODO: This should abort the journal and alert other nodes
2631 * that our slot needs recovery. */
2632
2633 /* Force a panic(). This stinks, but it's better than letting
2634 * things continue without having a proper hard readonly
2635 * here. */
2636 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2637 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2638 ocfs2_handle_error(sb);
2639 }
2640
2641 /*
2642 * Void signal blockers, because in-kernel sigprocmask() only fails
2643 * when SIG_* is wrong.
2644 */
2645 void ocfs2_block_signals(sigset_t *oldset)
2646 {
2647 int rc;
2648 sigset_t blocked;
2649
2650 sigfillset(&blocked);
2651 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2652 BUG_ON(rc);
2653 }
2654
2655 void ocfs2_unblock_signals(sigset_t *oldset)
2656 {
2657 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2658 BUG_ON(rc);
2659 }
2660
2661 module_init(ocfs2_init);
2662 module_exit(ocfs2_exit);
Linux kernel - Deliverables
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