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 "ver.h"
72 #include "xattr.h"
73 #include "quota.h"
74 #include "refcounttree.h"
75 #include "suballoc.h"
76
77 #include "buffer_head_io.h"
78
79 static struct kmem_cache *ocfs2_inode_cachep = NULL;
80 struct kmem_cache *ocfs2_dquot_cachep;
81 struct kmem_cache *ocfs2_qf_chunk_cachep;
82
83 /* OCFS2 needs to schedule several different types of work which
84 * require cluster locking, disk I/O, recovery waits, etc. Since these
85 * types of work tend to be heavy we avoid using the kernel events
86 * workqueue and schedule on our own. */
87 struct workqueue_struct *ocfs2_wq = NULL;
88
89 static struct dentry *ocfs2_debugfs_root = NULL;
90
91 MODULE_AUTHOR("Oracle");
92 MODULE_LICENSE("GPL");
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 const struct super_operations ocfs2_sops = {
147 .statfs = ocfs2_statfs,
148 .alloc_inode = ocfs2_alloc_inode,
149 .destroy_inode = ocfs2_destroy_inode,
150 .drop_inode = ocfs2_drop_inode,
151 .evict_inode = ocfs2_evict_inode,
152 .sync_fs = ocfs2_sync_fs,
153 .put_super = ocfs2_put_super,
154 .remount_fs = ocfs2_remount,
155 .show_options = ocfs2_show_options,
156 .quota_read = ocfs2_quota_read,
157 .quota_write = ocfs2_quota_write,
158 };
159
160 enum {
161 Opt_barrier,
162 Opt_err_panic,
163 Opt_err_ro,
164 Opt_intr,
165 Opt_nointr,
166 Opt_hb_none,
167 Opt_hb_local,
168 Opt_hb_global,
169 Opt_data_ordered,
170 Opt_data_writeback,
171 Opt_atime_quantum,
172 Opt_slot,
173 Opt_commit,
174 Opt_localalloc,
175 Opt_localflocks,
176 Opt_stack,
177 Opt_user_xattr,
178 Opt_nouser_xattr,
179 Opt_inode64,
180 Opt_acl,
181 Opt_noacl,
182 Opt_usrquota,
183 Opt_grpquota,
184 Opt_coherency_buffered,
185 Opt_coherency_full,
186 Opt_resv_level,
187 Opt_dir_resv_level,
188 Opt_err,
189 };
190
191 static const match_table_t tokens = {
192 {Opt_barrier, "barrier=%u"},
193 {Opt_err_panic, "errors=panic"},
194 {Opt_err_ro, "errors=remount-ro"},
195 {Opt_intr, "intr"},
196 {Opt_nointr, "nointr"},
197 {Opt_hb_none, OCFS2_HB_NONE},
198 {Opt_hb_local, OCFS2_HB_LOCAL},
199 {Opt_hb_global, OCFS2_HB_GLOBAL},
200 {Opt_data_ordered, "data=ordered"},
201 {Opt_data_writeback, "data=writeback"},
202 {Opt_atime_quantum, "atime_quantum=%u"},
203 {Opt_slot, "preferred_slot=%u"},
204 {Opt_commit, "commit=%u"},
205 {Opt_localalloc, "localalloc=%d"},
206 {Opt_localflocks, "localflocks"},
207 {Opt_stack, "cluster_stack=%s"},
208 {Opt_user_xattr, "user_xattr"},
209 {Opt_nouser_xattr, "nouser_xattr"},
210 {Opt_inode64, "inode64"},
211 {Opt_acl, "acl"},
212 {Opt_noacl, "noacl"},
213 {Opt_usrquota, "usrquota"},
214 {Opt_grpquota, "grpquota"},
215 {Opt_coherency_buffered, "coherency=buffered"},
216 {Opt_coherency_full, "coherency=full"},
217 {Opt_resv_level, "resv_level=%u"},
218 {Opt_dir_resv_level, "dir_resv_level=%u"},
219 {Opt_err, NULL}
220 };
221
222 #ifdef CONFIG_DEBUG_FS
ocfs2_osb_dump(struct ocfs2_super * osb,char * buf,int len)223 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
224 {
225 struct ocfs2_cluster_connection *cconn = osb->cconn;
226 struct ocfs2_recovery_map *rm = osb->recovery_map;
227 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
228 int i, out = 0;
229
230 out += snprintf(buf + out, len - out,
231 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
232 "Device", osb->dev_str, osb->uuid_str,
233 osb->fs_generation, osb->vol_label);
234
235 out += snprintf(buf + out, len - out,
236 "%10s => State: %d Flags: 0x%lX\n", "Volume",
237 atomic_read(&osb->vol_state), osb->osb_flags);
238
239 out += snprintf(buf + out, len - out,
240 "%10s => Block: %lu Cluster: %d\n", "Sizes",
241 osb->sb->s_blocksize, osb->s_clustersize);
242
243 out += snprintf(buf + out, len - out,
244 "%10s => Compat: 0x%X Incompat: 0x%X "
245 "ROcompat: 0x%X\n",
246 "Features", osb->s_feature_compat,
247 osb->s_feature_incompat, osb->s_feature_ro_compat);
248
249 out += snprintf(buf + out, len - out,
250 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
251 osb->s_mount_opt, osb->s_atime_quantum);
252
253 if (cconn) {
254 out += snprintf(buf + out, len - out,
255 "%10s => Stack: %s Name: %*s "
256 "Version: %d.%d\n", "Cluster",
257 (*osb->osb_cluster_stack == '\0' ?
258 "o2cb" : osb->osb_cluster_stack),
259 cconn->cc_namelen, cconn->cc_name,
260 cconn->cc_version.pv_major,
261 cconn->cc_version.pv_minor);
262 }
263
264 spin_lock(&osb->dc_task_lock);
265 out += snprintf(buf + out, len - out,
266 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
267 "WorkSeq: %lu\n", "DownCnvt",
268 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
269 osb->blocked_lock_count, osb->dc_wake_sequence,
270 osb->dc_work_sequence);
271 spin_unlock(&osb->dc_task_lock);
272
273 spin_lock(&osb->osb_lock);
274 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
275 "Recovery",
276 (osb->recovery_thread_task ?
277 task_pid_nr(osb->recovery_thread_task) : -1));
278 if (rm->rm_used == 0)
279 out += snprintf(buf + out, len - out, " None\n");
280 else {
281 for (i = 0; i < rm->rm_used; i++)
282 out += snprintf(buf + out, len - out, " %d",
283 rm->rm_entries[i]);
284 out += snprintf(buf + out, len - out, "\n");
285 }
286 spin_unlock(&osb->osb_lock);
287
288 out += snprintf(buf + out, len - out,
289 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
290 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
291 osb->osb_commit_interval,
292 atomic_read(&osb->needs_checkpoint));
293
294 out += snprintf(buf + out, len - out,
295 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
296 "Journal", osb->journal->j_state,
297 osb->journal->j_trans_id,
298 atomic_read(&osb->journal->j_num_trans));
299
300 out += snprintf(buf + out, len - out,
301 "%10s => GlobalAllocs: %d LocalAllocs: %d "
302 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
303 "Stats",
304 atomic_read(&osb->alloc_stats.bitmap_data),
305 atomic_read(&osb->alloc_stats.local_data),
306 atomic_read(&osb->alloc_stats.bg_allocs),
307 atomic_read(&osb->alloc_stats.moves),
308 atomic_read(&osb->alloc_stats.bg_extends));
309
310 out += snprintf(buf + out, len - out,
311 "%10s => State: %u Descriptor: %llu Size: %u bits "
312 "Default: %u bits\n",
313 "LocalAlloc", osb->local_alloc_state,
314 (unsigned long long)osb->la_last_gd,
315 osb->local_alloc_bits, osb->local_alloc_default_bits);
316
317 spin_lock(&osb->osb_lock);
318 out += snprintf(buf + out, len - out,
319 "%10s => InodeSlot: %d StolenInodes: %d, "
320 "MetaSlot: %d StolenMeta: %d\n", "Steal",
321 osb->s_inode_steal_slot,
322 atomic_read(&osb->s_num_inodes_stolen),
323 osb->s_meta_steal_slot,
324 atomic_read(&osb->s_num_meta_stolen));
325 spin_unlock(&osb->osb_lock);
326
327 out += snprintf(buf + out, len - out, "OrphanScan => ");
328 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
329 os->os_count, os->os_seqno);
330 out += snprintf(buf + out, len - out, " Last Scan: ");
331 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
332 out += snprintf(buf + out, len - out, "Disabled\n");
333 else
334 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
335 (get_seconds() - os->os_scantime.tv_sec));
336
337 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
338 "Slots", "Num", "RecoGen");
339 for (i = 0; i < osb->max_slots; ++i) {
340 out += snprintf(buf + out, len - out,
341 "%10s %c %3d %10d\n",
342 " ",
343 (i == osb->slot_num ? '*' : ' '),
344 i, osb->slot_recovery_generations[i]);
345 }
346
347 return out;
348 }
349
ocfs2_osb_debug_open(struct inode * inode,struct file * file)350 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
351 {
352 struct ocfs2_super *osb = inode->i_private;
353 char *buf = NULL;
354
355 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356 if (!buf)
357 goto bail;
358
359 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
360
361 file->private_data = buf;
362
363 return 0;
364 bail:
365 return -ENOMEM;
366 }
367
ocfs2_debug_release(struct inode * inode,struct file * file)368 static int ocfs2_debug_release(struct inode *inode, struct file *file)
369 {
370 kfree(file->private_data);
371 return 0;
372 }
373
ocfs2_debug_read(struct file * file,char __user * buf,size_t nbytes,loff_t * ppos)374 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
375 size_t nbytes, loff_t *ppos)
376 {
377 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
378 i_size_read(file->f_mapping->host));
379 }
380 #else
ocfs2_osb_debug_open(struct inode * inode,struct file * file)381 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
382 {
383 return 0;
384 }
ocfs2_debug_release(struct inode * inode,struct file * file)385 static int ocfs2_debug_release(struct inode *inode, struct file *file)
386 {
387 return 0;
388 }
ocfs2_debug_read(struct file * file,char __user * buf,size_t nbytes,loff_t * ppos)389 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
390 size_t nbytes, loff_t *ppos)
391 {
392 return 0;
393 }
394 #endif /* CONFIG_DEBUG_FS */
395
396 static const struct file_operations ocfs2_osb_debug_fops = {
397 .open = ocfs2_osb_debug_open,
398 .release = ocfs2_debug_release,
399 .read = ocfs2_debug_read,
400 .llseek = generic_file_llseek,
401 };
402
ocfs2_sync_fs(struct super_block * sb,int wait)403 static int ocfs2_sync_fs(struct super_block *sb, int wait)
404 {
405 int status;
406 tid_t target;
407 struct ocfs2_super *osb = OCFS2_SB(sb);
408
409 if (ocfs2_is_hard_readonly(osb))
410 return -EROFS;
411
412 if (wait) {
413 status = ocfs2_flush_truncate_log(osb);
414 if (status < 0)
415 mlog_errno(status);
416 } else {
417 ocfs2_schedule_truncate_log_flush(osb, 0);
418 }
419
420 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
421 &target)) {
422 if (wait)
423 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
424 target);
425 }
426 return 0;
427 }
428
ocfs2_need_system_inode(struct ocfs2_super * osb,int ino)429 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
430 {
431 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
432 && (ino == USER_QUOTA_SYSTEM_INODE
433 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
434 return 0;
435 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
436 && (ino == GROUP_QUOTA_SYSTEM_INODE
437 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
438 return 0;
439 return 1;
440 }
441
ocfs2_init_global_system_inodes(struct ocfs2_super * osb)442 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
443 {
444 struct inode *new = NULL;
445 int status = 0;
446 int i;
447
448 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
449 if (IS_ERR(new)) {
450 status = PTR_ERR(new);
451 mlog_errno(status);
452 goto bail;
453 }
454 osb->root_inode = new;
455
456 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
457 if (IS_ERR(new)) {
458 status = PTR_ERR(new);
459 mlog_errno(status);
460 goto bail;
461 }
462 osb->sys_root_inode = new;
463
464 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
465 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
466 if (!ocfs2_need_system_inode(osb, i))
467 continue;
468 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
469 if (!new) {
470 ocfs2_release_system_inodes(osb);
471 status = -EINVAL;
472 mlog_errno(status);
473 /* FIXME: Should ERROR_RO_FS */
474 mlog(ML_ERROR, "Unable to load system inode %d, "
475 "possibly corrupt fs?", i);
476 goto bail;
477 }
478 // the array now has one ref, so drop this one
479 iput(new);
480 }
481
482 bail:
483 if (status)
484 mlog_errno(status);
485 return status;
486 }
487
ocfs2_init_local_system_inodes(struct ocfs2_super * osb)488 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
489 {
490 struct inode *new = NULL;
491 int status = 0;
492 int i;
493
494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
495 i < NUM_SYSTEM_INODES;
496 i++) {
497 if (!ocfs2_need_system_inode(osb, i))
498 continue;
499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
500 if (!new) {
501 ocfs2_release_system_inodes(osb);
502 status = -EINVAL;
503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
504 status, i, osb->slot_num);
505 goto bail;
506 }
507 /* the array now has one ref, so drop this one */
508 iput(new);
509 }
510
511 bail:
512 if (status)
513 mlog_errno(status);
514 return status;
515 }
516
ocfs2_release_system_inodes(struct ocfs2_super * osb)517 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
518 {
519 int i;
520 struct inode *inode;
521
522 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
523 inode = osb->global_system_inodes[i];
524 if (inode) {
525 iput(inode);
526 osb->global_system_inodes[i] = NULL;
527 }
528 }
529
530 inode = osb->sys_root_inode;
531 if (inode) {
532 iput(inode);
533 osb->sys_root_inode = NULL;
534 }
535
536 inode = osb->root_inode;
537 if (inode) {
538 iput(inode);
539 osb->root_inode = NULL;
540 }
541
542 if (!osb->local_system_inodes)
543 return;
544
545 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
546 if (osb->local_system_inodes[i]) {
547 iput(osb->local_system_inodes[i]);
548 osb->local_system_inodes[i] = NULL;
549 }
550 }
551
552 kfree(osb->local_system_inodes);
553 osb->local_system_inodes = NULL;
554 }
555
556 /* We're allocating fs objects, use GFP_NOFS */
ocfs2_alloc_inode(struct super_block * sb)557 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
558 {
559 struct ocfs2_inode_info *oi;
560
561 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
562 if (!oi)
563 return NULL;
564
565 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
566 return &oi->vfs_inode;
567 }
568
ocfs2_i_callback(struct rcu_head * head)569 static void ocfs2_i_callback(struct rcu_head *head)
570 {
571 struct inode *inode = container_of(head, struct inode, i_rcu);
572 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
573 }
574
ocfs2_destroy_inode(struct inode * inode)575 static void ocfs2_destroy_inode(struct inode *inode)
576 {
577 call_rcu(&inode->i_rcu, ocfs2_i_callback);
578 }
579
ocfs2_max_file_offset(unsigned int bbits,unsigned int cbits)580 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
581 unsigned int cbits)
582 {
583 unsigned int bytes = 1 << cbits;
584 unsigned int trim = bytes;
585 unsigned int bitshift = 32;
586
587 /*
588 * i_size and all block offsets in ocfs2 are always 64 bits
589 * wide. i_clusters is 32 bits, in cluster-sized units. So on
590 * 64 bit platforms, cluster size will be the limiting factor.
591 */
592
593 #if BITS_PER_LONG == 32
594 # if defined(CONFIG_LBDAF)
595 BUILD_BUG_ON(sizeof(sector_t) != 8);
596 /*
597 * We might be limited by page cache size.
598 */
599 if (bytes > PAGE_CACHE_SIZE) {
600 bytes = PAGE_CACHE_SIZE;
601 trim = 1;
602 /*
603 * Shift by 31 here so that we don't get larger than
604 * MAX_LFS_FILESIZE
605 */
606 bitshift = 31;
607 }
608 # else
609 /*
610 * We are limited by the size of sector_t. Use block size, as
611 * that's what we expose to the VFS.
612 */
613 bytes = 1 << bbits;
614 trim = 1;
615 bitshift = 31;
616 # endif
617 #endif
618
619 /*
620 * Trim by a whole cluster when we can actually approach the
621 * on-disk limits. Otherwise we can overflow i_clusters when
622 * an extent start is at the max offset.
623 */
624 return (((unsigned long long)bytes) << bitshift) - trim;
625 }
626
ocfs2_remount(struct super_block * sb,int * flags,char * data)627 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
628 {
629 int incompat_features;
630 int ret = 0;
631 struct mount_options parsed_options;
632 struct ocfs2_super *osb = OCFS2_SB(sb);
633 u32 tmp;
634
635 sync_filesystem(sb);
636
637 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
638 !ocfs2_check_set_options(sb, &parsed_options)) {
639 ret = -EINVAL;
640 goto out;
641 }
642
643 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
644 OCFS2_MOUNT_HB_NONE;
645 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
646 ret = -EINVAL;
647 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
648 goto out;
649 }
650
651 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
652 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
653 ret = -EINVAL;
654 mlog(ML_ERROR, "Cannot change data mode on remount\n");
655 goto out;
656 }
657
658 /* Probably don't want this on remount; it might
659 * mess with other nodes */
660 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
661 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
662 ret = -EINVAL;
663 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
664 goto out;
665 }
666
667 /* We're going to/from readonly mode. */
668 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
669 /* Disable quota accounting before remounting RO */
670 if (*flags & MS_RDONLY) {
671 ret = ocfs2_susp_quotas(osb, 0);
672 if (ret < 0)
673 goto out;
674 }
675 /* Lock here so the check of HARD_RO and the potential
676 * setting of SOFT_RO is atomic. */
677 spin_lock(&osb->osb_lock);
678 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
679 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
680 ret = -EROFS;
681 goto unlock_osb;
682 }
683
684 if (*flags & MS_RDONLY) {
685 sb->s_flags |= MS_RDONLY;
686 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
687 } else {
688 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
689 mlog(ML_ERROR, "Cannot remount RDWR "
690 "filesystem due to previous errors.\n");
691 ret = -EROFS;
692 goto unlock_osb;
693 }
694 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
695 if (incompat_features) {
696 mlog(ML_ERROR, "Cannot remount RDWR because "
697 "of unsupported optional features "
698 "(%x).\n", incompat_features);
699 ret = -EINVAL;
700 goto unlock_osb;
701 }
702 sb->s_flags &= ~MS_RDONLY;
703 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
704 }
705 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
706 unlock_osb:
707 spin_unlock(&osb->osb_lock);
708 /* Enable quota accounting after remounting RW */
709 if (!ret && !(*flags & MS_RDONLY)) {
710 if (sb_any_quota_suspended(sb))
711 ret = ocfs2_susp_quotas(osb, 1);
712 else
713 ret = ocfs2_enable_quotas(osb);
714 if (ret < 0) {
715 /* Return back changes... */
716 spin_lock(&osb->osb_lock);
717 sb->s_flags |= MS_RDONLY;
718 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
719 spin_unlock(&osb->osb_lock);
720 goto out;
721 }
722 }
723 }
724
725 if (!ret) {
726 /* Only save off the new mount options in case of a successful
727 * remount. */
728 osb->s_mount_opt = parsed_options.mount_opt;
729 osb->s_atime_quantum = parsed_options.atime_quantum;
730 osb->preferred_slot = parsed_options.slot;
731 if (parsed_options.commit_interval)
732 osb->osb_commit_interval = parsed_options.commit_interval;
733
734 if (!ocfs2_is_hard_readonly(osb))
735 ocfs2_set_journal_params(osb);
736
737 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
738 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
739 MS_POSIXACL : 0);
740 }
741 out:
742 return ret;
743 }
744
ocfs2_sb_probe(struct super_block * sb,struct buffer_head ** bh,int * sector_size,struct ocfs2_blockcheck_stats * stats)745 static int ocfs2_sb_probe(struct super_block *sb,
746 struct buffer_head **bh,
747 int *sector_size,
748 struct ocfs2_blockcheck_stats *stats)
749 {
750 int status, tmpstat;
751 struct ocfs1_vol_disk_hdr *hdr;
752 struct ocfs2_dinode *di;
753 int blksize;
754
755 *bh = NULL;
756
757 /* may be > 512 */
758 *sector_size = bdev_logical_block_size(sb->s_bdev);
759 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
760 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
761 *sector_size, OCFS2_MAX_BLOCKSIZE);
762 status = -EINVAL;
763 goto bail;
764 }
765
766 /* Can this really happen? */
767 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
768 *sector_size = OCFS2_MIN_BLOCKSIZE;
769
770 /* check block zero for old format */
771 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
772 if (status < 0) {
773 mlog_errno(status);
774 goto bail;
775 }
776 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
777 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
778 mlog(ML_ERROR, "incompatible version: %u.%u\n",
779 hdr->major_version, hdr->minor_version);
780 status = -EINVAL;
781 }
782 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
783 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
784 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
785 hdr->signature);
786 status = -EINVAL;
787 }
788 brelse(*bh);
789 *bh = NULL;
790 if (status < 0) {
791 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
792 "upgraded before mounting with ocfs v2\n");
793 goto bail;
794 }
795
796 /*
797 * Now check at magic offset for 512, 1024, 2048, 4096
798 * blocksizes. 4096 is the maximum blocksize because it is
799 * the minimum clustersize.
800 */
801 status = -EINVAL;
802 for (blksize = *sector_size;
803 blksize <= OCFS2_MAX_BLOCKSIZE;
804 blksize <<= 1) {
805 tmpstat = ocfs2_get_sector(sb, bh,
806 OCFS2_SUPER_BLOCK_BLKNO,
807 blksize);
808 if (tmpstat < 0) {
809 status = tmpstat;
810 mlog_errno(status);
811 break;
812 }
813 di = (struct ocfs2_dinode *) (*bh)->b_data;
814 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
815 spin_lock_init(&stats->b_lock);
816 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
817 if (tmpstat < 0) {
818 brelse(*bh);
819 *bh = NULL;
820 }
821 if (tmpstat != -EAGAIN) {
822 status = tmpstat;
823 break;
824 }
825 }
826
827 bail:
828 return status;
829 }
830
ocfs2_verify_heartbeat(struct ocfs2_super * osb)831 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
832 {
833 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
834
835 if (osb->s_mount_opt & hb_enabled) {
836 if (ocfs2_mount_local(osb)) {
837 mlog(ML_ERROR, "Cannot heartbeat on a locally "
838 "mounted device.\n");
839 return -EINVAL;
840 }
841 if (ocfs2_userspace_stack(osb)) {
842 mlog(ML_ERROR, "Userspace stack expected, but "
843 "o2cb heartbeat arguments passed to mount\n");
844 return -EINVAL;
845 }
846 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
847 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
848 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
849 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
850 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
851 return -EINVAL;
852 }
853 }
854
855 if (!(osb->s_mount_opt & hb_enabled)) {
856 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
857 !ocfs2_userspace_stack(osb)) {
858 mlog(ML_ERROR, "Heartbeat has to be started to mount "
859 "a read-write clustered device.\n");
860 return -EINVAL;
861 }
862 }
863
864 return 0;
865 }
866
867 /*
868 * If we're using a userspace stack, mount should have passed
869 * a name that matches the disk. If not, mount should not
870 * have passed a stack.
871 */
ocfs2_verify_userspace_stack(struct ocfs2_super * osb,struct mount_options * mopt)872 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
873 struct mount_options *mopt)
874 {
875 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
876 mlog(ML_ERROR,
877 "cluster stack passed to mount, but this filesystem "
878 "does not support it\n");
879 return -EINVAL;
880 }
881
882 if (ocfs2_userspace_stack(osb) &&
883 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
884 OCFS2_STACK_LABEL_LEN)) {
885 mlog(ML_ERROR,
886 "cluster stack passed to mount (\"%s\") does not "
887 "match the filesystem (\"%s\")\n",
888 mopt->cluster_stack,
889 osb->osb_cluster_stack);
890 return -EINVAL;
891 }
892
893 return 0;
894 }
895
ocfs2_susp_quotas(struct ocfs2_super * osb,int unsuspend)896 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
897 {
898 int type;
899 struct super_block *sb = osb->sb;
900 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
901 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
902 int status = 0;
903
904 for (type = 0; type < MAXQUOTAS; type++) {
905 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
906 continue;
907 if (unsuspend)
908 status = dquot_resume(sb, type);
909 else {
910 struct ocfs2_mem_dqinfo *oinfo;
911
912 /* Cancel periodic syncing before suspending */
913 oinfo = sb_dqinfo(sb, type)->dqi_priv;
914 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
915 status = dquot_suspend(sb, type);
916 }
917 if (status < 0)
918 break;
919 }
920 if (status < 0)
921 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
922 "remount (error = %d).\n", status);
923 return status;
924 }
925
ocfs2_enable_quotas(struct ocfs2_super * osb)926 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
927 {
928 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
929 struct super_block *sb = osb->sb;
930 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
931 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
932 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
933 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
934 int status;
935 int type;
936
937 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
938 for (type = 0; type < MAXQUOTAS; type++) {
939 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
940 continue;
941 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
942 osb->slot_num);
943 if (!inode[type]) {
944 status = -ENOENT;
945 goto out_quota_off;
946 }
947 status = dquot_enable(inode[type], type, QFMT_OCFS2,
948 DQUOT_USAGE_ENABLED);
949 if (status < 0)
950 goto out_quota_off;
951 }
952
953 for (type = 0; type < MAXQUOTAS; type++)
954 iput(inode[type]);
955 return 0;
956 out_quota_off:
957 ocfs2_disable_quotas(osb);
958 for (type = 0; type < MAXQUOTAS; type++)
959 iput(inode[type]);
960 mlog_errno(status);
961 return status;
962 }
963
ocfs2_disable_quotas(struct ocfs2_super * osb)964 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
965 {
966 int type;
967 struct inode *inode;
968 struct super_block *sb = osb->sb;
969 struct ocfs2_mem_dqinfo *oinfo;
970
971 /* We mostly ignore errors in this function because there's not much
972 * we can do when we see them */
973 for (type = 0; type < MAXQUOTAS; type++) {
974 if (!sb_has_quota_loaded(sb, type))
975 continue;
976 /* Cancel periodic syncing before we grab dqonoff_mutex */
977 oinfo = sb_dqinfo(sb, type)->dqi_priv;
978 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
979 inode = igrab(sb->s_dquot.files[type]);
980 /* Turn off quotas. This will remove all dquot structures from
981 * memory and so they will be automatically synced to global
982 * quota files */
983 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
984 DQUOT_LIMITS_ENABLED);
985 if (!inode)
986 continue;
987 iput(inode);
988 }
989 }
990
991 /* Handle quota on quotactl */
ocfs2_quota_on(struct super_block * sb,int type,int format_id)992 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
993 {
994 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
995 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
996
997 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
998 return -EINVAL;
999
1000 return dquot_enable(sb_dqopt(sb)->files[type], type,
1001 format_id, DQUOT_LIMITS_ENABLED);
1002 }
1003
1004 /* Handle quota off quotactl */
ocfs2_quota_off(struct super_block * sb,int type)1005 static int ocfs2_quota_off(struct super_block *sb, int type)
1006 {
1007 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
1008 }
1009
1010 static const struct quotactl_ops ocfs2_quotactl_ops = {
1011 .quota_on_meta = ocfs2_quota_on,
1012 .quota_off = ocfs2_quota_off,
1013 .quota_sync = dquot_quota_sync,
1014 .get_info = dquot_get_dqinfo,
1015 .set_info = dquot_set_dqinfo,
1016 .get_dqblk = dquot_get_dqblk,
1017 .set_dqblk = dquot_set_dqblk,
1018 };
1019
ocfs2_fill_super(struct super_block * sb,void * data,int silent)1020 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1021 {
1022 struct dentry *root;
1023 int status, sector_size;
1024 struct mount_options parsed_options;
1025 struct inode *inode = NULL;
1026 struct ocfs2_super *osb = NULL;
1027 struct buffer_head *bh = NULL;
1028 char nodestr[8];
1029 struct ocfs2_blockcheck_stats stats;
1030
1031 trace_ocfs2_fill_super(sb, data, silent);
1032
1033 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
1034 status = -EINVAL;
1035 goto read_super_error;
1036 }
1037
1038 /* probe for superblock */
1039 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
1040 if (status < 0) {
1041 mlog(ML_ERROR, "superblock probe failed!\n");
1042 goto read_super_error;
1043 }
1044
1045 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1046 osb = OCFS2_SB(sb);
1047 if (status < 0) {
1048 mlog_errno(status);
1049 goto read_super_error;
1050 }
1051 brelse(bh);
1052 bh = NULL;
1053
1054 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1055 status = -EINVAL;
1056 goto read_super_error;
1057 }
1058 osb->s_mount_opt = parsed_options.mount_opt;
1059 osb->s_atime_quantum = parsed_options.atime_quantum;
1060 osb->preferred_slot = parsed_options.slot;
1061 osb->osb_commit_interval = parsed_options.commit_interval;
1062
1063 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1064 osb->osb_resv_level = parsed_options.resv_level;
1065 osb->osb_dir_resv_level = parsed_options.resv_level;
1066 if (parsed_options.dir_resv_level == -1)
1067 osb->osb_dir_resv_level = parsed_options.resv_level;
1068 else
1069 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1070
1071 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1072 if (status)
1073 goto read_super_error;
1074
1075 sb->s_magic = OCFS2_SUPER_MAGIC;
1076
1077 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
1078 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1079
1080 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1081 * heartbeat=none */
1082 if (bdev_read_only(sb->s_bdev)) {
1083 if (!(sb->s_flags & MS_RDONLY)) {
1084 status = -EACCES;
1085 mlog(ML_ERROR, "Readonly device detected but readonly "
1086 "mount was not specified.\n");
1087 goto read_super_error;
1088 }
1089
1090 /* You should not be able to start a local heartbeat
1091 * on a readonly device. */
1092 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1093 status = -EROFS;
1094 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1095 "device.\n");
1096 goto read_super_error;
1097 }
1098
1099 status = ocfs2_check_journals_nolocks(osb);
1100 if (status < 0) {
1101 if (status == -EROFS)
1102 mlog(ML_ERROR, "Recovery required on readonly "
1103 "file system, but write access is "
1104 "unavailable.\n");
1105 else
1106 mlog_errno(status);
1107 goto read_super_error;
1108 }
1109
1110 ocfs2_set_ro_flag(osb, 1);
1111
1112 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1113 "Cluster services will not be used for this mount. "
1114 "Recovery will be skipped.\n", osb->dev_str);
1115 }
1116
1117 if (!ocfs2_is_hard_readonly(osb)) {
1118 if (sb->s_flags & MS_RDONLY)
1119 ocfs2_set_ro_flag(osb, 0);
1120 }
1121
1122 status = ocfs2_verify_heartbeat(osb);
1123 if (status < 0) {
1124 mlog_errno(status);
1125 goto read_super_error;
1126 }
1127
1128 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1129 ocfs2_debugfs_root);
1130 if (!osb->osb_debug_root) {
1131 status = -EINVAL;
1132 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1133 goto read_super_error;
1134 }
1135
1136 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1137 osb->osb_debug_root,
1138 osb,
1139 &ocfs2_osb_debug_fops);
1140 if (!osb->osb_ctxt) {
1141 status = -EINVAL;
1142 mlog_errno(status);
1143 goto read_super_error;
1144 }
1145
1146 if (ocfs2_meta_ecc(osb)) {
1147 status = ocfs2_blockcheck_stats_debugfs_install(
1148 &osb->osb_ecc_stats,
1149 osb->osb_debug_root);
1150 if (status) {
1151 mlog(ML_ERROR,
1152 "Unable to create blockcheck statistics "
1153 "files\n");
1154 goto read_super_error;
1155 }
1156 }
1157
1158 status = ocfs2_mount_volume(sb);
1159 if (status < 0)
1160 goto read_super_error;
1161
1162 if (osb->root_inode)
1163 inode = igrab(osb->root_inode);
1164
1165 if (!inode) {
1166 status = -EIO;
1167 mlog_errno(status);
1168 goto read_super_error;
1169 }
1170
1171 root = d_make_root(inode);
1172 if (!root) {
1173 status = -ENOMEM;
1174 mlog_errno(status);
1175 goto read_super_error;
1176 }
1177
1178 sb->s_root = root;
1179
1180 ocfs2_complete_mount_recovery(osb);
1181
1182 if (ocfs2_mount_local(osb))
1183 snprintf(nodestr, sizeof(nodestr), "local");
1184 else
1185 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1186
1187 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1188 "with %s data mode.\n",
1189 osb->dev_str, nodestr, osb->slot_num,
1190 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1191 "ordered");
1192
1193 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1194 wake_up(&osb->osb_mount_event);
1195
1196 /* Now we can initialize quotas because we can afford to wait
1197 * for cluster locks recovery now. That also means that truncation
1198 * log recovery can happen but that waits for proper quota setup */
1199 if (!(sb->s_flags & MS_RDONLY)) {
1200 status = ocfs2_enable_quotas(osb);
1201 if (status < 0) {
1202 /* We have to err-out specially here because
1203 * s_root is already set */
1204 mlog_errno(status);
1205 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1206 wake_up(&osb->osb_mount_event);
1207 return status;
1208 }
1209 }
1210
1211 ocfs2_complete_quota_recovery(osb);
1212
1213 /* Now we wake up again for processes waiting for quotas */
1214 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1215 wake_up(&osb->osb_mount_event);
1216
1217 /* Start this when the mount is almost sure of being successful */
1218 ocfs2_orphan_scan_start(osb);
1219
1220 return status;
1221
1222 read_super_error:
1223 brelse(bh);
1224
1225 if (osb) {
1226 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1227 wake_up(&osb->osb_mount_event);
1228 ocfs2_dismount_volume(sb, 1);
1229 }
1230
1231 if (status)
1232 mlog_errno(status);
1233 return status;
1234 }
1235
ocfs2_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1236 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1237 int flags,
1238 const char *dev_name,
1239 void *data)
1240 {
1241 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1242 }
1243
ocfs2_kill_sb(struct super_block * sb)1244 static void ocfs2_kill_sb(struct super_block *sb)
1245 {
1246 struct ocfs2_super *osb = OCFS2_SB(sb);
1247
1248 /* Failed mount? */
1249 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1250 goto out;
1251
1252 /* Prevent further queueing of inode drop events */
1253 spin_lock(&dentry_list_lock);
1254 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1255 spin_unlock(&dentry_list_lock);
1256 /* Wait for work to finish and/or remove it */
1257 cancel_work_sync(&osb->dentry_lock_work);
1258 out:
1259 kill_block_super(sb);
1260 }
1261
1262 static struct file_system_type ocfs2_fs_type = {
1263 .owner = THIS_MODULE,
1264 .name = "ocfs2",
1265 .mount = ocfs2_mount,
1266 .kill_sb = ocfs2_kill_sb,
1267
1268 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1269 .next = NULL
1270 };
1271 MODULE_ALIAS_FS("ocfs2");
1272
ocfs2_check_set_options(struct super_block * sb,struct mount_options * options)1273 static int ocfs2_check_set_options(struct super_block *sb,
1274 struct mount_options *options)
1275 {
1276 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1277 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1278 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1279 mlog(ML_ERROR, "User quotas were requested, but this "
1280 "filesystem does not have the feature enabled.\n");
1281 return 0;
1282 }
1283 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1284 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1285 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1286 mlog(ML_ERROR, "Group quotas were requested, but this "
1287 "filesystem does not have the feature enabled.\n");
1288 return 0;
1289 }
1290 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1291 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1292 mlog(ML_ERROR, "ACL support requested but extended attributes "
1293 "feature is not enabled\n");
1294 return 0;
1295 }
1296 /* No ACL setting specified? Use XATTR feature... */
1297 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1298 OCFS2_MOUNT_NO_POSIX_ACL))) {
1299 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1300 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1301 else
1302 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1303 }
1304 return 1;
1305 }
1306
ocfs2_parse_options(struct super_block * sb,char * options,struct mount_options * mopt,int is_remount)1307 static int ocfs2_parse_options(struct super_block *sb,
1308 char *options,
1309 struct mount_options *mopt,
1310 int is_remount)
1311 {
1312 int status, user_stack = 0;
1313 char *p;
1314 u32 tmp;
1315
1316 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1317
1318 mopt->commit_interval = 0;
1319 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1320 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1321 mopt->slot = OCFS2_INVALID_SLOT;
1322 mopt->localalloc_opt = -1;
1323 mopt->cluster_stack[0] = '\0';
1324 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1325 mopt->dir_resv_level = -1;
1326
1327 if (!options) {
1328 status = 1;
1329 goto bail;
1330 }
1331
1332 while ((p = strsep(&options, ",")) != NULL) {
1333 int token, option;
1334 substring_t args[MAX_OPT_ARGS];
1335
1336 if (!*p)
1337 continue;
1338
1339 token = match_token(p, tokens, args);
1340 switch (token) {
1341 case Opt_hb_local:
1342 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1343 break;
1344 case Opt_hb_none:
1345 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1346 break;
1347 case Opt_hb_global:
1348 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1349 break;
1350 case Opt_barrier:
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option)
1356 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1357 else
1358 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1359 break;
1360 case Opt_intr:
1361 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1362 break;
1363 case Opt_nointr:
1364 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1365 break;
1366 case Opt_err_panic:
1367 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1368 break;
1369 case Opt_err_ro:
1370 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1371 break;
1372 case Opt_data_ordered:
1373 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1374 break;
1375 case Opt_data_writeback:
1376 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1377 break;
1378 case Opt_user_xattr:
1379 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1380 break;
1381 case Opt_nouser_xattr:
1382 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1383 break;
1384 case Opt_atime_quantum:
1385 if (match_int(&args[0], &option)) {
1386 status = 0;
1387 goto bail;
1388 }
1389 if (option >= 0)
1390 mopt->atime_quantum = option;
1391 break;
1392 case Opt_slot:
1393 option = 0;
1394 if (match_int(&args[0], &option)) {
1395 status = 0;
1396 goto bail;
1397 }
1398 if (option)
1399 mopt->slot = (s16)option;
1400 break;
1401 case Opt_commit:
1402 option = 0;
1403 if (match_int(&args[0], &option)) {
1404 status = 0;
1405 goto bail;
1406 }
1407 if (option < 0)
1408 return 0;
1409 if (option == 0)
1410 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1411 mopt->commit_interval = HZ * option;
1412 break;
1413 case Opt_localalloc:
1414 option = 0;
1415 if (match_int(&args[0], &option)) {
1416 status = 0;
1417 goto bail;
1418 }
1419 if (option >= 0)
1420 mopt->localalloc_opt = option;
1421 break;
1422 case Opt_localflocks:
1423 /*
1424 * Changing this during remount could race
1425 * flock() requests, or "unbalance" existing
1426 * ones (e.g., a lock is taken in one mode but
1427 * dropped in the other). If users care enough
1428 * to flip locking modes during remount, we
1429 * could add a "local" flag to individual
1430 * flock structures for proper tracking of
1431 * state.
1432 */
1433 if (!is_remount)
1434 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1435 break;
1436 case Opt_stack:
1437 /* Check both that the option we were passed
1438 * is of the right length and that it is a proper
1439 * string of the right length.
1440 */
1441 if (((args[0].to - args[0].from) !=
1442 OCFS2_STACK_LABEL_LEN) ||
1443 (strnlen(args[0].from,
1444 OCFS2_STACK_LABEL_LEN) !=
1445 OCFS2_STACK_LABEL_LEN)) {
1446 mlog(ML_ERROR,
1447 "Invalid cluster_stack option\n");
1448 status = 0;
1449 goto bail;
1450 }
1451 memcpy(mopt->cluster_stack, args[0].from,
1452 OCFS2_STACK_LABEL_LEN);
1453 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1454 /*
1455 * Open code the memcmp here as we don't have
1456 * an osb to pass to
1457 * ocfs2_userspace_stack().
1458 */
1459 if (memcmp(mopt->cluster_stack,
1460 OCFS2_CLASSIC_CLUSTER_STACK,
1461 OCFS2_STACK_LABEL_LEN))
1462 user_stack = 1;
1463 break;
1464 case Opt_inode64:
1465 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1466 break;
1467 case Opt_usrquota:
1468 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1469 break;
1470 case Opt_grpquota:
1471 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1472 break;
1473 case Opt_coherency_buffered:
1474 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1475 break;
1476 case Opt_coherency_full:
1477 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1478 break;
1479 case Opt_acl:
1480 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1481 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1482 break;
1483 case Opt_noacl:
1484 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1485 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1486 break;
1487 case Opt_resv_level:
1488 if (is_remount)
1489 break;
1490 if (match_int(&args[0], &option)) {
1491 status = 0;
1492 goto bail;
1493 }
1494 if (option >= OCFS2_MIN_RESV_LEVEL &&
1495 option < OCFS2_MAX_RESV_LEVEL)
1496 mopt->resv_level = option;
1497 break;
1498 case Opt_dir_resv_level:
1499 if (is_remount)
1500 break;
1501 if (match_int(&args[0], &option)) {
1502 status = 0;
1503 goto bail;
1504 }
1505 if (option >= OCFS2_MIN_RESV_LEVEL &&
1506 option < OCFS2_MAX_RESV_LEVEL)
1507 mopt->dir_resv_level = option;
1508 break;
1509 default:
1510 mlog(ML_ERROR,
1511 "Unrecognized mount option \"%s\" "
1512 "or missing value\n", p);
1513 status = 0;
1514 goto bail;
1515 }
1516 }
1517
1518 if (user_stack == 0) {
1519 /* Ensure only one heartbeat mode */
1520 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1521 OCFS2_MOUNT_HB_GLOBAL |
1522 OCFS2_MOUNT_HB_NONE);
1523 if (hweight32(tmp) != 1) {
1524 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1525 status = 0;
1526 goto bail;
1527 }
1528 }
1529
1530 status = 1;
1531
1532 bail:
1533 return status;
1534 }
1535
ocfs2_show_options(struct seq_file * s,struct dentry * root)1536 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1537 {
1538 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1539 unsigned long opts = osb->s_mount_opt;
1540 unsigned int local_alloc_megs;
1541
1542 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1543 seq_printf(s, ",_netdev");
1544 if (opts & OCFS2_MOUNT_HB_LOCAL)
1545 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1546 else
1547 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1548 } else
1549 seq_printf(s, ",%s", OCFS2_HB_NONE);
1550
1551 if (opts & OCFS2_MOUNT_NOINTR)
1552 seq_printf(s, ",nointr");
1553
1554 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1555 seq_printf(s, ",data=writeback");
1556 else
1557 seq_printf(s, ",data=ordered");
1558
1559 if (opts & OCFS2_MOUNT_BARRIER)
1560 seq_printf(s, ",barrier=1");
1561
1562 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1563 seq_printf(s, ",errors=panic");
1564 else
1565 seq_printf(s, ",errors=remount-ro");
1566
1567 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1568 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1569
1570 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1571
1572 if (osb->osb_commit_interval)
1573 seq_printf(s, ",commit=%u",
1574 (unsigned) (osb->osb_commit_interval / HZ));
1575
1576 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1577 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1578 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1579
1580 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1581 seq_printf(s, ",localflocks,");
1582
1583 if (osb->osb_cluster_stack[0])
1584 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1585 osb->osb_cluster_stack);
1586 if (opts & OCFS2_MOUNT_USRQUOTA)
1587 seq_printf(s, ",usrquota");
1588 if (opts & OCFS2_MOUNT_GRPQUOTA)
1589 seq_printf(s, ",grpquota");
1590
1591 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1592 seq_printf(s, ",coherency=buffered");
1593 else
1594 seq_printf(s, ",coherency=full");
1595
1596 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1597 seq_printf(s, ",nouser_xattr");
1598 else
1599 seq_printf(s, ",user_xattr");
1600
1601 if (opts & OCFS2_MOUNT_INODE64)
1602 seq_printf(s, ",inode64");
1603
1604 if (opts & OCFS2_MOUNT_POSIX_ACL)
1605 seq_printf(s, ",acl");
1606 else
1607 seq_printf(s, ",noacl");
1608
1609 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1610 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1611
1612 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1613 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1614
1615 return 0;
1616 }
1617
1618 wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ];
1619
ocfs2_init(void)1620 static int __init ocfs2_init(void)
1621 {
1622 int status, i;
1623
1624 ocfs2_print_version();
1625
1626 for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++)
1627 init_waitqueue_head(&ocfs2__ioend_wq[i]);
1628
1629 status = init_ocfs2_uptodate_cache();
1630 if (status < 0)
1631 goto out1;
1632
1633 status = ocfs2_initialize_mem_caches();
1634 if (status < 0)
1635 goto out2;
1636
1637 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1638 if (!ocfs2_wq) {
1639 status = -ENOMEM;
1640 goto out3;
1641 }
1642
1643 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1644 if (!ocfs2_debugfs_root) {
1645 status = -EFAULT;
1646 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1647 }
1648
1649 ocfs2_set_locking_protocol();
1650
1651 status = register_quota_format(&ocfs2_quota_format);
1652 if (status < 0)
1653 goto out4;
1654 status = register_filesystem(&ocfs2_fs_type);
1655 if (!status)
1656 return 0;
1657
1658 unregister_quota_format(&ocfs2_quota_format);
1659 out4:
1660 destroy_workqueue(ocfs2_wq);
1661 debugfs_remove(ocfs2_debugfs_root);
1662 out3:
1663 ocfs2_free_mem_caches();
1664 out2:
1665 exit_ocfs2_uptodate_cache();
1666 out1:
1667 mlog_errno(status);
1668 return status;
1669 }
1670
ocfs2_exit(void)1671 static void __exit ocfs2_exit(void)
1672 {
1673 if (ocfs2_wq) {
1674 flush_workqueue(ocfs2_wq);
1675 destroy_workqueue(ocfs2_wq);
1676 }
1677
1678 unregister_quota_format(&ocfs2_quota_format);
1679
1680 debugfs_remove(ocfs2_debugfs_root);
1681
1682 ocfs2_free_mem_caches();
1683
1684 unregister_filesystem(&ocfs2_fs_type);
1685
1686 exit_ocfs2_uptodate_cache();
1687 }
1688
ocfs2_put_super(struct super_block * sb)1689 static void ocfs2_put_super(struct super_block *sb)
1690 {
1691 trace_ocfs2_put_super(sb);
1692
1693 ocfs2_sync_blockdev(sb);
1694 ocfs2_dismount_volume(sb, 0);
1695 }
1696
ocfs2_statfs(struct dentry * dentry,struct kstatfs * buf)1697 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1698 {
1699 struct ocfs2_super *osb;
1700 u32 numbits, freebits;
1701 int status;
1702 struct ocfs2_dinode *bm_lock;
1703 struct buffer_head *bh = NULL;
1704 struct inode *inode = NULL;
1705
1706 trace_ocfs2_statfs(dentry->d_sb, buf);
1707
1708 osb = OCFS2_SB(dentry->d_sb);
1709
1710 inode = ocfs2_get_system_file_inode(osb,
1711 GLOBAL_BITMAP_SYSTEM_INODE,
1712 OCFS2_INVALID_SLOT);
1713 if (!inode) {
1714 mlog(ML_ERROR, "failed to get bitmap inode\n");
1715 status = -EIO;
1716 goto bail;
1717 }
1718
1719 status = ocfs2_inode_lock(inode, &bh, 0);
1720 if (status < 0) {
1721 mlog_errno(status);
1722 goto bail;
1723 }
1724
1725 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1726
1727 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1728 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1729
1730 buf->f_type = OCFS2_SUPER_MAGIC;
1731 buf->f_bsize = dentry->d_sb->s_blocksize;
1732 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1733 buf->f_blocks = ((sector_t) numbits) *
1734 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1735 buf->f_bfree = ((sector_t) freebits) *
1736 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1737 buf->f_bavail = buf->f_bfree;
1738 buf->f_files = numbits;
1739 buf->f_ffree = freebits;
1740 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1741 & 0xFFFFFFFFUL;
1742 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1743 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1744
1745 brelse(bh);
1746
1747 ocfs2_inode_unlock(inode, 0);
1748 status = 0;
1749 bail:
1750 if (inode)
1751 iput(inode);
1752
1753 if (status)
1754 mlog_errno(status);
1755
1756 return status;
1757 }
1758
ocfs2_inode_init_once(void * data)1759 static void ocfs2_inode_init_once(void *data)
1760 {
1761 struct ocfs2_inode_info *oi = data;
1762
1763 oi->ip_flags = 0;
1764 oi->ip_open_count = 0;
1765 spin_lock_init(&oi->ip_lock);
1766 ocfs2_extent_map_init(&oi->vfs_inode);
1767 INIT_LIST_HEAD(&oi->ip_io_markers);
1768 oi->ip_dir_start_lookup = 0;
1769 atomic_set(&oi->ip_unaligned_aio, 0);
1770 init_rwsem(&oi->ip_alloc_sem);
1771 init_rwsem(&oi->ip_xattr_sem);
1772 mutex_init(&oi->ip_io_mutex);
1773
1774 oi->ip_blkno = 0ULL;
1775 oi->ip_clusters = 0;
1776
1777 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1778
1779 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1780 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1781 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1782
1783 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1784 &ocfs2_inode_caching_ops);
1785
1786 inode_init_once(&oi->vfs_inode);
1787 }
1788
ocfs2_initialize_mem_caches(void)1789 static int ocfs2_initialize_mem_caches(void)
1790 {
1791 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1792 sizeof(struct ocfs2_inode_info),
1793 0,
1794 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1795 SLAB_MEM_SPREAD),
1796 ocfs2_inode_init_once);
1797 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1798 sizeof(struct ocfs2_dquot),
1799 0,
1800 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1801 SLAB_MEM_SPREAD),
1802 NULL);
1803 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1804 sizeof(struct ocfs2_quota_chunk),
1805 0,
1806 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1807 NULL);
1808 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1809 !ocfs2_qf_chunk_cachep) {
1810 if (ocfs2_inode_cachep)
1811 kmem_cache_destroy(ocfs2_inode_cachep);
1812 if (ocfs2_dquot_cachep)
1813 kmem_cache_destroy(ocfs2_dquot_cachep);
1814 if (ocfs2_qf_chunk_cachep)
1815 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1816 return -ENOMEM;
1817 }
1818
1819 return 0;
1820 }
1821
ocfs2_free_mem_caches(void)1822 static void ocfs2_free_mem_caches(void)
1823 {
1824 /*
1825 * Make sure all delayed rcu free inodes are flushed before we
1826 * destroy cache.
1827 */
1828 rcu_barrier();
1829 if (ocfs2_inode_cachep)
1830 kmem_cache_destroy(ocfs2_inode_cachep);
1831 ocfs2_inode_cachep = NULL;
1832
1833 if (ocfs2_dquot_cachep)
1834 kmem_cache_destroy(ocfs2_dquot_cachep);
1835 ocfs2_dquot_cachep = NULL;
1836
1837 if (ocfs2_qf_chunk_cachep)
1838 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1839 ocfs2_qf_chunk_cachep = NULL;
1840 }
1841
ocfs2_get_sector(struct super_block * sb,struct buffer_head ** bh,int block,int sect_size)1842 static int ocfs2_get_sector(struct super_block *sb,
1843 struct buffer_head **bh,
1844 int block,
1845 int sect_size)
1846 {
1847 if (!sb_set_blocksize(sb, sect_size)) {
1848 mlog(ML_ERROR, "unable to set blocksize\n");
1849 return -EIO;
1850 }
1851
1852 *bh = sb_getblk(sb, block);
1853 if (!*bh) {
1854 mlog_errno(-EIO);
1855 return -EIO;
1856 }
1857 lock_buffer(*bh);
1858 if (!buffer_dirty(*bh))
1859 clear_buffer_uptodate(*bh);
1860 unlock_buffer(*bh);
1861 ll_rw_block(READ, 1, bh);
1862 wait_on_buffer(*bh);
1863 if (!buffer_uptodate(*bh)) {
1864 mlog_errno(-EIO);
1865 brelse(*bh);
1866 *bh = NULL;
1867 return -EIO;
1868 }
1869
1870 return 0;
1871 }
1872
ocfs2_mount_volume(struct super_block * sb)1873 static int ocfs2_mount_volume(struct super_block *sb)
1874 {
1875 int status = 0;
1876 int unlock_super = 0;
1877 struct ocfs2_super *osb = OCFS2_SB(sb);
1878
1879 if (ocfs2_is_hard_readonly(osb))
1880 goto leave;
1881
1882 status = ocfs2_dlm_init(osb);
1883 if (status < 0) {
1884 mlog_errno(status);
1885 goto leave;
1886 }
1887
1888 status = ocfs2_super_lock(osb, 1);
1889 if (status < 0) {
1890 mlog_errno(status);
1891 goto leave;
1892 }
1893 unlock_super = 1;
1894
1895 /* This will load up the node map and add ourselves to it. */
1896 status = ocfs2_find_slot(osb);
1897 if (status < 0) {
1898 mlog_errno(status);
1899 goto leave;
1900 }
1901
1902 /* load all node-local system inodes */
1903 status = ocfs2_init_local_system_inodes(osb);
1904 if (status < 0) {
1905 mlog_errno(status);
1906 goto leave;
1907 }
1908
1909 status = ocfs2_check_volume(osb);
1910 if (status < 0) {
1911 mlog_errno(status);
1912 goto leave;
1913 }
1914
1915 status = ocfs2_truncate_log_init(osb);
1916 if (status < 0)
1917 mlog_errno(status);
1918
1919 leave:
1920 if (unlock_super)
1921 ocfs2_super_unlock(osb, 1);
1922
1923 return status;
1924 }
1925
ocfs2_dismount_volume(struct super_block * sb,int mnt_err)1926 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1927 {
1928 int tmp, hangup_needed = 0;
1929 struct ocfs2_super *osb = NULL;
1930 char nodestr[8];
1931
1932 trace_ocfs2_dismount_volume(sb);
1933
1934 BUG_ON(!sb);
1935 osb = OCFS2_SB(sb);
1936 BUG_ON(!osb);
1937
1938 debugfs_remove(osb->osb_ctxt);
1939
1940 /*
1941 * Flush inode dropping work queue so that deletes are
1942 * performed while the filesystem is still working
1943 */
1944 ocfs2_drop_all_dl_inodes(osb);
1945
1946 /* Orphan scan should be stopped as early as possible */
1947 ocfs2_orphan_scan_stop(osb);
1948
1949 ocfs2_disable_quotas(osb);
1950
1951 ocfs2_shutdown_local_alloc(osb);
1952
1953 ocfs2_truncate_log_shutdown(osb);
1954
1955 /* This will disable recovery and flush any recovery work. */
1956 ocfs2_recovery_exit(osb);
1957
1958 ocfs2_journal_shutdown(osb);
1959
1960 ocfs2_sync_blockdev(sb);
1961
1962 ocfs2_purge_refcount_trees(osb);
1963
1964 /* No cluster connection means we've failed during mount, so skip
1965 * all the steps which depended on that to complete. */
1966 if (osb->cconn) {
1967 tmp = ocfs2_super_lock(osb, 1);
1968 if (tmp < 0) {
1969 mlog_errno(tmp);
1970 return;
1971 }
1972 }
1973
1974 if (osb->slot_num != OCFS2_INVALID_SLOT)
1975 ocfs2_put_slot(osb);
1976
1977 if (osb->cconn)
1978 ocfs2_super_unlock(osb, 1);
1979
1980 ocfs2_release_system_inodes(osb);
1981
1982 /*
1983 * If we're dismounting due to mount error, mount.ocfs2 will clean
1984 * up heartbeat. If we're a local mount, there is no heartbeat.
1985 * If we failed before we got a uuid_str yet, we can't stop
1986 * heartbeat. Otherwise, do it.
1987 */
1988 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1989 !ocfs2_is_hard_readonly(osb))
1990 hangup_needed = 1;
1991
1992 if (osb->cconn)
1993 ocfs2_dlm_shutdown(osb, hangup_needed);
1994
1995 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1996 debugfs_remove(osb->osb_debug_root);
1997
1998 if (hangup_needed)
1999 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
2000
2001 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
2002
2003 if (ocfs2_mount_local(osb))
2004 snprintf(nodestr, sizeof(nodestr), "local");
2005 else
2006 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
2007
2008 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2009 osb->dev_str, nodestr);
2010
2011 ocfs2_delete_osb(osb);
2012 kfree(osb);
2013 sb->s_dev = 0;
2014 sb->s_fs_info = NULL;
2015 }
2016
ocfs2_setup_osb_uuid(struct ocfs2_super * osb,const unsigned char * uuid,unsigned uuid_bytes)2017 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2018 unsigned uuid_bytes)
2019 {
2020 int i, ret;
2021 char *ptr;
2022
2023 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2024
2025 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
2026 if (osb->uuid_str == NULL)
2027 return -ENOMEM;
2028
2029 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2030 /* print with null */
2031 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2032 if (ret != 2) /* drop super cleans up */
2033 return -EINVAL;
2034 /* then only advance past the last char */
2035 ptr += 2;
2036 }
2037
2038 return 0;
2039 }
2040
2041 /* Make sure entire volume is addressable by our journal. Requires
2042 osb_clusters_at_boot to be valid and for the journal to have been
2043 initialized by ocfs2_journal_init(). */
ocfs2_journal_addressable(struct ocfs2_super * osb)2044 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2045 {
2046 int status = 0;
2047 u64 max_block =
2048 ocfs2_clusters_to_blocks(osb->sb,
2049 osb->osb_clusters_at_boot) - 1;
2050
2051 /* 32-bit block number is always OK. */
2052 if (max_block <= (u32)~0ULL)
2053 goto out;
2054
2055 /* Volume is "huge", so see if our journal is new enough to
2056 support it. */
2057 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2058 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2059 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2060 JBD2_FEATURE_INCOMPAT_64BIT))) {
2061 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2062 "Enable the 'block64' journal option with tunefs.ocfs2");
2063 status = -EFBIG;
2064 goto out;
2065 }
2066
2067 out:
2068 return status;
2069 }
2070
ocfs2_initialize_super(struct super_block * sb,struct buffer_head * bh,int sector_size,struct ocfs2_blockcheck_stats * stats)2071 static int ocfs2_initialize_super(struct super_block *sb,
2072 struct buffer_head *bh,
2073 int sector_size,
2074 struct ocfs2_blockcheck_stats *stats)
2075 {
2076 int status;
2077 int i, cbits, bbits;
2078 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2079 struct inode *inode = NULL;
2080 struct ocfs2_journal *journal;
2081 __le32 uuid_net_key;
2082 struct ocfs2_super *osb;
2083 u64 total_blocks;
2084
2085 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2086 if (!osb) {
2087 status = -ENOMEM;
2088 mlog_errno(status);
2089 goto bail;
2090 }
2091
2092 sb->s_fs_info = osb;
2093 sb->s_op = &ocfs2_sops;
2094 sb->s_d_op = &ocfs2_dentry_ops;
2095 sb->s_export_op = &ocfs2_export_ops;
2096 sb->s_qcop = &ocfs2_quotactl_ops;
2097 sb->dq_op = &ocfs2_quota_operations;
2098 sb->s_xattr = ocfs2_xattr_handlers;
2099 sb->s_time_gran = 1;
2100 sb->s_flags |= MS_NOATIME;
2101 /* this is needed to support O_LARGEFILE */
2102 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2103 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2104 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2105
2106 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2107
2108 for (i = 0; i < 3; i++)
2109 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2110 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2111
2112 osb->sb = sb;
2113 /* Save off for ocfs2_rw_direct */
2114 osb->s_sectsize_bits = blksize_bits(sector_size);
2115 BUG_ON(!osb->s_sectsize_bits);
2116
2117 spin_lock_init(&osb->dc_task_lock);
2118 init_waitqueue_head(&osb->dc_event);
2119 osb->dc_work_sequence = 0;
2120 osb->dc_wake_sequence = 0;
2121 INIT_LIST_HEAD(&osb->blocked_lock_list);
2122 osb->blocked_lock_count = 0;
2123 spin_lock_init(&osb->osb_lock);
2124 spin_lock_init(&osb->osb_xattr_lock);
2125 ocfs2_init_steal_slots(osb);
2126
2127 atomic_set(&osb->alloc_stats.moves, 0);
2128 atomic_set(&osb->alloc_stats.local_data, 0);
2129 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2130 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2131 atomic_set(&osb->alloc_stats.bg_extends, 0);
2132
2133 /* Copy the blockcheck stats from the superblock probe */
2134 osb->osb_ecc_stats = *stats;
2135
2136 ocfs2_init_node_maps(osb);
2137
2138 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2139 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2140
2141 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2142 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2143 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2144 osb->max_slots);
2145 status = -EINVAL;
2146 goto bail;
2147 }
2148
2149 ocfs2_orphan_scan_init(osb);
2150
2151 status = ocfs2_recovery_init(osb);
2152 if (status) {
2153 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2154 mlog_errno(status);
2155 goto bail;
2156 }
2157
2158 init_waitqueue_head(&osb->checkpoint_event);
2159 atomic_set(&osb->needs_checkpoint, 0);
2160
2161 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2162
2163 osb->slot_num = OCFS2_INVALID_SLOT;
2164
2165 osb->s_xattr_inline_size = le16_to_cpu(
2166 di->id2.i_super.s_xattr_inline_size);
2167
2168 osb->local_alloc_state = OCFS2_LA_UNUSED;
2169 osb->local_alloc_bh = NULL;
2170 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2171
2172 init_waitqueue_head(&osb->osb_mount_event);
2173
2174 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2175 if (status) {
2176 mlog_errno(status);
2177 goto bail;
2178 }
2179
2180 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2181 if (!osb->vol_label) {
2182 mlog(ML_ERROR, "unable to alloc vol label\n");
2183 status = -ENOMEM;
2184 goto bail;
2185 }
2186
2187 osb->slot_recovery_generations =
2188 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2189 GFP_KERNEL);
2190 if (!osb->slot_recovery_generations) {
2191 status = -ENOMEM;
2192 mlog_errno(status);
2193 goto bail;
2194 }
2195
2196 init_waitqueue_head(&osb->osb_wipe_event);
2197 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2198 sizeof(*osb->osb_orphan_wipes),
2199 GFP_KERNEL);
2200 if (!osb->osb_orphan_wipes) {
2201 status = -ENOMEM;
2202 mlog_errno(status);
2203 goto bail;
2204 }
2205
2206 osb->osb_rf_lock_tree = RB_ROOT;
2207
2208 osb->s_feature_compat =
2209 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2210 osb->s_feature_ro_compat =
2211 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2212 osb->s_feature_incompat =
2213 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2214
2215 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2216 mlog(ML_ERROR, "couldn't mount because of unsupported "
2217 "optional features (%x).\n", i);
2218 status = -EINVAL;
2219 goto bail;
2220 }
2221 if (!(osb->sb->s_flags & MS_RDONLY) &&
2222 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2223 mlog(ML_ERROR, "couldn't mount RDWR because of "
2224 "unsupported optional features (%x).\n", i);
2225 status = -EINVAL;
2226 goto bail;
2227 }
2228
2229 if (ocfs2_clusterinfo_valid(osb)) {
2230 osb->osb_stackflags =
2231 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2232 memcpy(osb->osb_cluster_stack,
2233 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2234 OCFS2_STACK_LABEL_LEN);
2235 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2236 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2237 mlog(ML_ERROR,
2238 "couldn't mount because of an invalid "
2239 "cluster stack label (%s) \n",
2240 osb->osb_cluster_stack);
2241 status = -EINVAL;
2242 goto bail;
2243 }
2244 } else {
2245 /* The empty string is identical with classic tools that
2246 * don't know about s_cluster_info. */
2247 osb->osb_cluster_stack[0] = '\0';
2248 }
2249
2250 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2251
2252 /* FIXME
2253 * This should be done in ocfs2_journal_init(), but unknown
2254 * ordering issues will cause the filesystem to crash.
2255 * If anyone wants to figure out what part of the code
2256 * refers to osb->journal before ocfs2_journal_init() is run,
2257 * be my guest.
2258 */
2259 /* initialize our journal structure */
2260
2261 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2262 if (!journal) {
2263 mlog(ML_ERROR, "unable to alloc journal\n");
2264 status = -ENOMEM;
2265 goto bail;
2266 }
2267 osb->journal = journal;
2268 journal->j_osb = osb;
2269
2270 atomic_set(&journal->j_num_trans, 0);
2271 init_rwsem(&journal->j_trans_barrier);
2272 init_waitqueue_head(&journal->j_checkpointed);
2273 spin_lock_init(&journal->j_lock);
2274 journal->j_trans_id = (unsigned long) 1;
2275 INIT_LIST_HEAD(&journal->j_la_cleanups);
2276 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2277 journal->j_state = OCFS2_JOURNAL_FREE;
2278
2279 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2280 osb->dentry_lock_list = NULL;
2281
2282 /* get some pseudo constants for clustersize bits */
2283 osb->s_clustersize_bits =
2284 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2285 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2286
2287 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2288 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2289 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2290 osb->s_clustersize);
2291 status = -EINVAL;
2292 goto bail;
2293 }
2294
2295 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2296 le32_to_cpu(di->i_clusters));
2297
2298 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2299 total_blocks);
2300 if (status) {
2301 mlog(ML_ERROR, "Volume too large "
2302 "to mount safely on this system");
2303 status = -EFBIG;
2304 goto bail;
2305 }
2306
2307 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2308 sizeof(di->id2.i_super.s_uuid))) {
2309 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2310 status = -ENOMEM;
2311 goto bail;
2312 }
2313
2314 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
2315
2316 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2317 osb->vol_label[63] = '\0';
2318 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2319 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2320 osb->first_cluster_group_blkno =
2321 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2322 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2323 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2324 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2325 (unsigned long long)osb->root_blkno,
2326 (unsigned long long)osb->system_dir_blkno,
2327 osb->s_clustersize_bits);
2328
2329 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2330 if (!osb->osb_dlm_debug) {
2331 status = -ENOMEM;
2332 mlog_errno(status);
2333 goto bail;
2334 }
2335
2336 atomic_set(&osb->vol_state, VOLUME_INIT);
2337
2338 /* load root, system_dir, and all global system inodes */
2339 status = ocfs2_init_global_system_inodes(osb);
2340 if (status < 0) {
2341 mlog_errno(status);
2342 goto bail;
2343 }
2344
2345 /*
2346 * global bitmap
2347 */
2348 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2349 OCFS2_INVALID_SLOT);
2350 if (!inode) {
2351 status = -EINVAL;
2352 mlog_errno(status);
2353 goto bail;
2354 }
2355
2356 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2357 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2358 iput(inode);
2359
2360 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2361 osb->s_feature_incompat) * 8;
2362
2363 status = ocfs2_init_slot_info(osb);
2364 if (status < 0) {
2365 mlog_errno(status);
2366 goto bail;
2367 }
2368 cleancache_init_shared_fs((char *)&di->id2.i_super.s_uuid, sb);
2369
2370 bail:
2371 return status;
2372 }
2373
2374 /*
2375 * will return: -EAGAIN if it is ok to keep searching for superblocks
2376 * -EINVAL if there is a bad superblock
2377 * 0 on success
2378 */
ocfs2_verify_volume(struct ocfs2_dinode * di,struct buffer_head * bh,u32 blksz,struct ocfs2_blockcheck_stats * stats)2379 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2380 struct buffer_head *bh,
2381 u32 blksz,
2382 struct ocfs2_blockcheck_stats *stats)
2383 {
2384 int status = -EAGAIN;
2385
2386 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2387 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2388 /* We have to do a raw check of the feature here */
2389 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2390 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2391 status = ocfs2_block_check_validate(bh->b_data,
2392 bh->b_size,
2393 &di->i_check,
2394 stats);
2395 if (status)
2396 goto out;
2397 }
2398 status = -EINVAL;
2399 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2400 mlog(ML_ERROR, "found superblock with incorrect block "
2401 "size: found %u, should be %u\n",
2402 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2403 blksz);
2404 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2405 OCFS2_MAJOR_REV_LEVEL ||
2406 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2407 OCFS2_MINOR_REV_LEVEL) {
2408 mlog(ML_ERROR, "found superblock with bad version: "
2409 "found %u.%u, should be %u.%u\n",
2410 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2411 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2412 OCFS2_MAJOR_REV_LEVEL,
2413 OCFS2_MINOR_REV_LEVEL);
2414 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2415 mlog(ML_ERROR, "bad block number on superblock: "
2416 "found %llu, should be %llu\n",
2417 (unsigned long long)le64_to_cpu(di->i_blkno),
2418 (unsigned long long)bh->b_blocknr);
2419 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2420 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2421 mlog(ML_ERROR, "bad cluster size found: %u\n",
2422 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2423 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2424 mlog(ML_ERROR, "bad root_blkno: 0\n");
2425 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2426 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2427 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2428 mlog(ML_ERROR,
2429 "Superblock slots found greater than file system "
2430 "maximum: found %u, max %u\n",
2431 le16_to_cpu(di->id2.i_super.s_max_slots),
2432 OCFS2_MAX_SLOTS);
2433 } else {
2434 /* found it! */
2435 status = 0;
2436 }
2437 }
2438
2439 out:
2440 if (status && status != -EAGAIN)
2441 mlog_errno(status);
2442 return status;
2443 }
2444
ocfs2_check_volume(struct ocfs2_super * osb)2445 static int ocfs2_check_volume(struct ocfs2_super *osb)
2446 {
2447 int status;
2448 int dirty;
2449 int local;
2450 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2451 * recover
2452 * ourselves. */
2453
2454 /* Init our journal object. */
2455 status = ocfs2_journal_init(osb->journal, &dirty);
2456 if (status < 0) {
2457 mlog(ML_ERROR, "Could not initialize journal!\n");
2458 goto finally;
2459 }
2460
2461 /* Now that journal has been initialized, check to make sure
2462 entire volume is addressable. */
2463 status = ocfs2_journal_addressable(osb);
2464 if (status)
2465 goto finally;
2466
2467 /* If the journal was unmounted cleanly then we don't want to
2468 * recover anything. Otherwise, journal_load will do that
2469 * dirty work for us :) */
2470 if (!dirty) {
2471 status = ocfs2_journal_wipe(osb->journal, 0);
2472 if (status < 0) {
2473 mlog_errno(status);
2474 goto finally;
2475 }
2476 } else {
2477 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2478 "unmounted cleanly, recovering it.\n", osb->dev_str);
2479 }
2480
2481 local = ocfs2_mount_local(osb);
2482
2483 /* will play back anything left in the journal. */
2484 status = ocfs2_journal_load(osb->journal, local, dirty);
2485 if (status < 0) {
2486 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2487 goto finally;
2488 }
2489
2490 if (dirty) {
2491 /* recover my local alloc if we didn't unmount cleanly. */
2492 status = ocfs2_begin_local_alloc_recovery(osb,
2493 osb->slot_num,
2494 &local_alloc);
2495 if (status < 0) {
2496 mlog_errno(status);
2497 goto finally;
2498 }
2499 /* we complete the recovery process after we've marked
2500 * ourselves as mounted. */
2501 }
2502
2503 status = ocfs2_load_local_alloc(osb);
2504 if (status < 0) {
2505 mlog_errno(status);
2506 goto finally;
2507 }
2508
2509 if (dirty) {
2510 /* Recovery will be completed after we've mounted the
2511 * rest of the volume. */
2512 osb->dirty = 1;
2513 osb->local_alloc_copy = local_alloc;
2514 local_alloc = NULL;
2515 }
2516
2517 /* go through each journal, trylock it and if you get the
2518 * lock, and it's marked as dirty, set the bit in the recover
2519 * map and launch a recovery thread for it. */
2520 status = ocfs2_mark_dead_nodes(osb);
2521 if (status < 0) {
2522 mlog_errno(status);
2523 goto finally;
2524 }
2525
2526 status = ocfs2_compute_replay_slots(osb);
2527 if (status < 0)
2528 mlog_errno(status);
2529
2530 finally:
2531 kfree(local_alloc);
2532
2533 if (status)
2534 mlog_errno(status);
2535 return status;
2536 }
2537
2538 /*
2539 * The routine gets called from dismount or close whenever a dismount on
2540 * volume is requested and the osb open count becomes 1.
2541 * It will remove the osb from the global list and also free up all the
2542 * initialized resources and fileobject.
2543 */
ocfs2_delete_osb(struct ocfs2_super * osb)2544 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2545 {
2546 /* This function assumes that the caller has the main osb resource */
2547
2548 ocfs2_free_slot_info(osb);
2549
2550 kfree(osb->osb_orphan_wipes);
2551 kfree(osb->slot_recovery_generations);
2552 /* FIXME
2553 * This belongs in journal shutdown, but because we have to
2554 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2555 * we free it here.
2556 */
2557 kfree(osb->journal);
2558 kfree(osb->local_alloc_copy);
2559 kfree(osb->uuid_str);
2560 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2561 memset(osb, 0, sizeof(struct ocfs2_super));
2562 }
2563
2564 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2565 * panic(). We do not support continue-on-error operation. */
ocfs2_handle_error(struct super_block * sb)2566 static void ocfs2_handle_error(struct super_block *sb)
2567 {
2568 struct ocfs2_super *osb = OCFS2_SB(sb);
2569
2570 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2571 panic("OCFS2: (device %s): panic forced after error\n",
2572 sb->s_id);
2573
2574 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2575
2576 if (sb->s_flags & MS_RDONLY &&
2577 (ocfs2_is_soft_readonly(osb) ||
2578 ocfs2_is_hard_readonly(osb)))
2579 return;
2580
2581 printk(KERN_CRIT "File system is now read-only due to the potential "
2582 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2583 "system is unmounted.\n");
2584 sb->s_flags |= MS_RDONLY;
2585 ocfs2_set_ro_flag(osb, 0);
2586 }
2587
2588 static char error_buf[1024];
2589
__ocfs2_error(struct super_block * sb,const char * function,const char * fmt,...)2590 void __ocfs2_error(struct super_block *sb,
2591 const char *function,
2592 const char *fmt, ...)
2593 {
2594 va_list args;
2595
2596 va_start(args, fmt);
2597 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2598 va_end(args);
2599
2600 /* Not using mlog here because we want to show the actual
2601 * function the error came from. */
2602 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2603 sb->s_id, function, error_buf);
2604
2605 ocfs2_handle_error(sb);
2606 }
2607
2608 /* Handle critical errors. This is intentionally more drastic than
2609 * ocfs2_handle_error, so we only use for things like journal errors,
2610 * etc. */
__ocfs2_abort(struct super_block * sb,const char * function,const char * fmt,...)2611 void __ocfs2_abort(struct super_block* sb,
2612 const char *function,
2613 const char *fmt, ...)
2614 {
2615 va_list args;
2616
2617 va_start(args, fmt);
2618 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2619 va_end(args);
2620
2621 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2622 sb->s_id, function, error_buf);
2623
2624 /* We don't have the cluster support yet to go straight to
2625 * hard readonly in here. Until then, we want to keep
2626 * ocfs2_abort() so that we can at least mark critical
2627 * errors.
2628 *
2629 * TODO: This should abort the journal and alert other nodes
2630 * that our slot needs recovery. */
2631
2632 /* Force a panic(). This stinks, but it's better than letting
2633 * things continue without having a proper hard readonly
2634 * here. */
2635 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2636 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2637 ocfs2_handle_error(sb);
2638 }
2639
2640 /*
2641 * Void signal blockers, because in-kernel sigprocmask() only fails
2642 * when SIG_* is wrong.
2643 */
ocfs2_block_signals(sigset_t * oldset)2644 void ocfs2_block_signals(sigset_t *oldset)
2645 {
2646 int rc;
2647 sigset_t blocked;
2648
2649 sigfillset(&blocked);
2650 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2651 BUG_ON(rc);
2652 }
2653
ocfs2_unblock_signals(sigset_t * oldset)2654 void ocfs2_unblock_signals(sigset_t *oldset)
2655 {
2656 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2657 BUG_ON(rc);
2658 }
2659
2660 module_init(ocfs2_init);
2661 module_exit(ocfs2_exit);
2662