1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * super.c
4 *
5 * load/unload driver, mount/dismount volumes
6 *
7 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
8 */
9
10 #include <linux/module.h>
11 #include <linux/fs.h>
12 #include <linux/types.h>
13 #include <linux/slab.h>
14 #include <linux/highmem.h>
15 #include <linux/init.h>
16 #include <linux/random.h>
17 #include <linux/statfs.h>
18 #include <linux/moduleparam.h>
19 #include <linux/blkdev.h>
20 #include <linux/socket.h>
21 #include <linux/inet.h>
22 #include <linux/parser.h>
23 #include <linux/crc32.h>
24 #include <linux/debugfs.h>
25 #include <linux/mount.h>
26 #include <linux/seq_file.h>
27 #include <linux/quotaops.h>
28 #include <linux/cleancache.h>
29 #include <linux/signal.h>
30
31 #define CREATE_TRACE_POINTS
32 #include "ocfs2_trace.h"
33
34 #include <cluster/masklog.h>
35
36 #include "ocfs2.h"
37
38 /* this should be the only file to include a version 1 header */
39 #include "ocfs1_fs_compat.h"
40
41 #include "alloc.h"
42 #include "aops.h"
43 #include "blockcheck.h"
44 #include "dlmglue.h"
45 #include "export.h"
46 #include "extent_map.h"
47 #include "heartbeat.h"
48 #include "inode.h"
49 #include "journal.h"
50 #include "localalloc.h"
51 #include "namei.h"
52 #include "slot_map.h"
53 #include "super.h"
54 #include "sysfile.h"
55 #include "uptodate.h"
56 #include "xattr.h"
57 #include "quota.h"
58 #include "refcounttree.h"
59 #include "suballoc.h"
60
61 #include "buffer_head_io.h"
62 #include "filecheck.h"
63
64 static struct kmem_cache *ocfs2_inode_cachep;
65 struct kmem_cache *ocfs2_dquot_cachep;
66 struct kmem_cache *ocfs2_qf_chunk_cachep;
67
68 static struct dentry *ocfs2_debugfs_root;
69
70 MODULE_AUTHOR("Oracle");
71 MODULE_LICENSE("GPL");
72 MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
73 MODULE_DESCRIPTION("OCFS2 cluster file system");
74
75 struct mount_options
76 {
77 unsigned long commit_interval;
78 unsigned long mount_opt;
79 unsigned int atime_quantum;
80 unsigned short slot;
81 int localalloc_opt;
82 unsigned int resv_level;
83 int dir_resv_level;
84 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
85 };
86
87 static int ocfs2_parse_options(struct super_block *sb, char *options,
88 struct mount_options *mopt,
89 int is_remount);
90 static int ocfs2_check_set_options(struct super_block *sb,
91 struct mount_options *options);
92 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
93 static void ocfs2_put_super(struct super_block *sb);
94 static int ocfs2_mount_volume(struct super_block *sb);
95 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
96 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
97 static int ocfs2_initialize_mem_caches(void);
98 static void ocfs2_free_mem_caches(void);
99 static void ocfs2_delete_osb(struct ocfs2_super *osb);
100
101 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
102
103 static int ocfs2_sync_fs(struct super_block *sb, int wait);
104
105 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
106 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
107 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
108 static int ocfs2_check_volume(struct ocfs2_super *osb);
109 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
110 struct buffer_head *bh,
111 u32 sectsize,
112 struct ocfs2_blockcheck_stats *stats);
113 static int ocfs2_initialize_super(struct super_block *sb,
114 struct buffer_head *bh,
115 int sector_size,
116 struct ocfs2_blockcheck_stats *stats);
117 static int ocfs2_get_sector(struct super_block *sb,
118 struct buffer_head **bh,
119 int block,
120 int sect_size);
121 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
122 static void ocfs2_free_inode(struct inode *inode);
123 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
124 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
125 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
126
ocfs2_get_dquots(struct inode * inode)127 static struct dquot __rcu **ocfs2_get_dquots(struct inode *inode)
128 {
129 return OCFS2_I(inode)->i_dquot;
130 }
131
132 static const struct super_operations ocfs2_sops = {
133 .statfs = ocfs2_statfs,
134 .alloc_inode = ocfs2_alloc_inode,
135 .free_inode = ocfs2_free_inode,
136 .drop_inode = ocfs2_drop_inode,
137 .evict_inode = ocfs2_evict_inode,
138 .sync_fs = ocfs2_sync_fs,
139 .put_super = ocfs2_put_super,
140 .remount_fs = ocfs2_remount,
141 .show_options = ocfs2_show_options,
142 .quota_read = ocfs2_quota_read,
143 .quota_write = ocfs2_quota_write,
144 .get_dquots = ocfs2_get_dquots,
145 };
146
147 enum {
148 Opt_barrier,
149 Opt_err_panic,
150 Opt_err_ro,
151 Opt_intr,
152 Opt_nointr,
153 Opt_hb_none,
154 Opt_hb_local,
155 Opt_hb_global,
156 Opt_data_ordered,
157 Opt_data_writeback,
158 Opt_atime_quantum,
159 Opt_slot,
160 Opt_commit,
161 Opt_localalloc,
162 Opt_localflocks,
163 Opt_stack,
164 Opt_user_xattr,
165 Opt_nouser_xattr,
166 Opt_inode64,
167 Opt_acl,
168 Opt_noacl,
169 Opt_usrquota,
170 Opt_grpquota,
171 Opt_coherency_buffered,
172 Opt_coherency_full,
173 Opt_resv_level,
174 Opt_dir_resv_level,
175 Opt_journal_async_commit,
176 Opt_err_cont,
177 Opt_err,
178 };
179
180 static const match_table_t tokens = {
181 {Opt_barrier, "barrier=%u"},
182 {Opt_err_panic, "errors=panic"},
183 {Opt_err_ro, "errors=remount-ro"},
184 {Opt_intr, "intr"},
185 {Opt_nointr, "nointr"},
186 {Opt_hb_none, OCFS2_HB_NONE},
187 {Opt_hb_local, OCFS2_HB_LOCAL},
188 {Opt_hb_global, OCFS2_HB_GLOBAL},
189 {Opt_data_ordered, "data=ordered"},
190 {Opt_data_writeback, "data=writeback"},
191 {Opt_atime_quantum, "atime_quantum=%u"},
192 {Opt_slot, "preferred_slot=%u"},
193 {Opt_commit, "commit=%u"},
194 {Opt_localalloc, "localalloc=%d"},
195 {Opt_localflocks, "localflocks"},
196 {Opt_stack, "cluster_stack=%s"},
197 {Opt_user_xattr, "user_xattr"},
198 {Opt_nouser_xattr, "nouser_xattr"},
199 {Opt_inode64, "inode64"},
200 {Opt_acl, "acl"},
201 {Opt_noacl, "noacl"},
202 {Opt_usrquota, "usrquota"},
203 {Opt_grpquota, "grpquota"},
204 {Opt_coherency_buffered, "coherency=buffered"},
205 {Opt_coherency_full, "coherency=full"},
206 {Opt_resv_level, "resv_level=%u"},
207 {Opt_dir_resv_level, "dir_resv_level=%u"},
208 {Opt_journal_async_commit, "journal_async_commit"},
209 {Opt_err_cont, "errors=continue"},
210 {Opt_err, NULL}
211 };
212
213 #ifdef CONFIG_DEBUG_FS
ocfs2_osb_dump(struct ocfs2_super * osb,char * buf,int len)214 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
215 {
216 struct ocfs2_cluster_connection *cconn = osb->cconn;
217 struct ocfs2_recovery_map *rm = osb->recovery_map;
218 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
219 int i, out = 0;
220 unsigned long flags;
221
222 out += scnprintf(buf + out, len - out,
223 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
224 "Device", osb->dev_str, osb->uuid_str,
225 osb->fs_generation, osb->vol_label);
226
227 out += scnprintf(buf + out, len - out,
228 "%10s => State: %d Flags: 0x%lX\n", "Volume",
229 atomic_read(&osb->vol_state), osb->osb_flags);
230
231 out += scnprintf(buf + out, len - out,
232 "%10s => Block: %lu Cluster: %d\n", "Sizes",
233 osb->sb->s_blocksize, osb->s_clustersize);
234
235 out += scnprintf(buf + out, len - out,
236 "%10s => Compat: 0x%X Incompat: 0x%X "
237 "ROcompat: 0x%X\n",
238 "Features", osb->s_feature_compat,
239 osb->s_feature_incompat, osb->s_feature_ro_compat);
240
241 out += scnprintf(buf + out, len - out,
242 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
243 osb->s_mount_opt, osb->s_atime_quantum);
244
245 if (cconn) {
246 out += scnprintf(buf + out, len - out,
247 "%10s => Stack: %s Name: %*s "
248 "Version: %d.%d\n", "Cluster",
249 (*osb->osb_cluster_stack == '\0' ?
250 "o2cb" : osb->osb_cluster_stack),
251 cconn->cc_namelen, cconn->cc_name,
252 cconn->cc_version.pv_major,
253 cconn->cc_version.pv_minor);
254 }
255
256 spin_lock_irqsave(&osb->dc_task_lock, flags);
257 out += scnprintf(buf + out, len - out,
258 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
259 "WorkSeq: %lu\n", "DownCnvt",
260 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
261 osb->blocked_lock_count, osb->dc_wake_sequence,
262 osb->dc_work_sequence);
263 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
264
265 spin_lock(&osb->osb_lock);
266 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
267 "Recovery",
268 (osb->recovery_thread_task ?
269 task_pid_nr(osb->recovery_thread_task) : -1));
270 if (rm->rm_used == 0)
271 out += scnprintf(buf + out, len - out, " None\n");
272 else {
273 for (i = 0; i < rm->rm_used; i++)
274 out += scnprintf(buf + out, len - out, " %d",
275 rm->rm_entries[i]);
276 out += scnprintf(buf + out, len - out, "\n");
277 }
278 spin_unlock(&osb->osb_lock);
279
280 out += scnprintf(buf + out, len - out,
281 "%10s => Pid: %d Interval: %lu\n", "Commit",
282 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
283 osb->osb_commit_interval);
284
285 out += scnprintf(buf + out, len - out,
286 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
287 "Journal", osb->journal->j_state,
288 osb->journal->j_trans_id,
289 atomic_read(&osb->journal->j_num_trans));
290
291 out += scnprintf(buf + out, len - out,
292 "%10s => GlobalAllocs: %d LocalAllocs: %d "
293 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
294 "Stats",
295 atomic_read(&osb->alloc_stats.bitmap_data),
296 atomic_read(&osb->alloc_stats.local_data),
297 atomic_read(&osb->alloc_stats.bg_allocs),
298 atomic_read(&osb->alloc_stats.moves),
299 atomic_read(&osb->alloc_stats.bg_extends));
300
301 out += scnprintf(buf + out, len - out,
302 "%10s => State: %u Descriptor: %llu Size: %u bits "
303 "Default: %u bits\n",
304 "LocalAlloc", osb->local_alloc_state,
305 (unsigned long long)osb->la_last_gd,
306 osb->local_alloc_bits, osb->local_alloc_default_bits);
307
308 spin_lock(&osb->osb_lock);
309 out += scnprintf(buf + out, len - out,
310 "%10s => InodeSlot: %d StolenInodes: %d, "
311 "MetaSlot: %d StolenMeta: %d\n", "Steal",
312 osb->s_inode_steal_slot,
313 atomic_read(&osb->s_num_inodes_stolen),
314 osb->s_meta_steal_slot,
315 atomic_read(&osb->s_num_meta_stolen));
316 spin_unlock(&osb->osb_lock);
317
318 out += scnprintf(buf + out, len - out, "OrphanScan => ");
319 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ",
320 os->os_count, os->os_seqno);
321 out += scnprintf(buf + out, len - out, " Last Scan: ");
322 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
323 out += scnprintf(buf + out, len - out, "Disabled\n");
324 else
325 out += scnprintf(buf + out, len - out, "%lu seconds ago\n",
326 (unsigned long)(ktime_get_seconds() - os->os_scantime));
327
328 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n",
329 "Slots", "Num", "RecoGen");
330 for (i = 0; i < osb->max_slots; ++i) {
331 out += scnprintf(buf + out, len - out,
332 "%10s %c %3d %10d\n",
333 " ",
334 (i == osb->slot_num ? '*' : ' '),
335 i, osb->slot_recovery_generations[i]);
336 }
337
338 return out;
339 }
340
ocfs2_osb_debug_open(struct inode * inode,struct file * file)341 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
342 {
343 struct ocfs2_super *osb = inode->i_private;
344 char *buf = NULL;
345
346 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
347 if (!buf)
348 goto bail;
349
350 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
351
352 file->private_data = buf;
353
354 return 0;
355 bail:
356 return -ENOMEM;
357 }
358
ocfs2_debug_release(struct inode * inode,struct file * file)359 static int ocfs2_debug_release(struct inode *inode, struct file *file)
360 {
361 kfree(file->private_data);
362 return 0;
363 }
364
ocfs2_debug_read(struct file * file,char __user * buf,size_t nbytes,loff_t * ppos)365 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
366 size_t nbytes, loff_t *ppos)
367 {
368 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
369 i_size_read(file->f_mapping->host));
370 }
371 #else
ocfs2_osb_debug_open(struct inode * inode,struct file * file)372 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
373 {
374 return 0;
375 }
ocfs2_debug_release(struct inode * inode,struct file * file)376 static int ocfs2_debug_release(struct inode *inode, struct file *file)
377 {
378 return 0;
379 }
ocfs2_debug_read(struct file * file,char __user * buf,size_t nbytes,loff_t * ppos)380 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
381 size_t nbytes, loff_t *ppos)
382 {
383 return 0;
384 }
385 #endif /* CONFIG_DEBUG_FS */
386
387 static const struct file_operations ocfs2_osb_debug_fops = {
388 .open = ocfs2_osb_debug_open,
389 .release = ocfs2_debug_release,
390 .read = ocfs2_debug_read,
391 .llseek = generic_file_llseek,
392 };
393
ocfs2_sync_fs(struct super_block * sb,int wait)394 static int ocfs2_sync_fs(struct super_block *sb, int wait)
395 {
396 int status;
397 tid_t target;
398 struct ocfs2_super *osb = OCFS2_SB(sb);
399
400 if (ocfs2_is_hard_readonly(osb))
401 return -EROFS;
402
403 if (wait) {
404 status = ocfs2_flush_truncate_log(osb);
405 if (status < 0)
406 mlog_errno(status);
407 } else {
408 ocfs2_schedule_truncate_log_flush(osb, 0);
409 }
410
411 if (jbd2_journal_start_commit(osb->journal->j_journal,
412 &target)) {
413 if (wait)
414 jbd2_log_wait_commit(osb->journal->j_journal,
415 target);
416 }
417 return 0;
418 }
419
ocfs2_need_system_inode(struct ocfs2_super * osb,int ino)420 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
421 {
422 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
423 && (ino == USER_QUOTA_SYSTEM_INODE
424 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
425 return 0;
426 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
427 && (ino == GROUP_QUOTA_SYSTEM_INODE
428 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
429 return 0;
430 return 1;
431 }
432
ocfs2_init_global_system_inodes(struct ocfs2_super * osb)433 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
434 {
435 struct inode *new = NULL;
436 int status = 0;
437 int i;
438
439 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
440 if (IS_ERR(new)) {
441 status = PTR_ERR(new);
442 mlog_errno(status);
443 goto bail;
444 }
445 osb->root_inode = new;
446
447 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
448 if (IS_ERR(new)) {
449 status = PTR_ERR(new);
450 mlog_errno(status);
451 goto bail;
452 }
453 osb->sys_root_inode = new;
454
455 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
456 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
457 if (!ocfs2_need_system_inode(osb, i))
458 continue;
459 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
460 if (!new) {
461 ocfs2_release_system_inodes(osb);
462 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
463 mlog_errno(status);
464 mlog(ML_ERROR, "Unable to load system inode %d, "
465 "possibly corrupt fs?", i);
466 goto bail;
467 }
468 // the array now has one ref, so drop this one
469 iput(new);
470 }
471
472 bail:
473 if (status)
474 mlog_errno(status);
475 return status;
476 }
477
ocfs2_init_local_system_inodes(struct ocfs2_super * osb)478 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
479 {
480 struct inode *new = NULL;
481 int status = 0;
482 int i;
483
484 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
485 i < NUM_SYSTEM_INODES;
486 i++) {
487 if (!ocfs2_need_system_inode(osb, i))
488 continue;
489 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
490 if (!new) {
491 ocfs2_release_system_inodes(osb);
492 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
493 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
494 status, i, osb->slot_num);
495 goto bail;
496 }
497 /* the array now has one ref, so drop this one */
498 iput(new);
499 }
500
501 bail:
502 if (status)
503 mlog_errno(status);
504 return status;
505 }
506
ocfs2_release_system_inodes(struct ocfs2_super * osb)507 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
508 {
509 int i;
510 struct inode *inode;
511
512 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
513 inode = osb->global_system_inodes[i];
514 if (inode) {
515 iput(inode);
516 osb->global_system_inodes[i] = NULL;
517 }
518 }
519
520 inode = osb->sys_root_inode;
521 if (inode) {
522 iput(inode);
523 osb->sys_root_inode = NULL;
524 }
525
526 inode = osb->root_inode;
527 if (inode) {
528 iput(inode);
529 osb->root_inode = NULL;
530 }
531
532 if (!osb->local_system_inodes)
533 return;
534
535 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
536 if (osb->local_system_inodes[i]) {
537 iput(osb->local_system_inodes[i]);
538 osb->local_system_inodes[i] = NULL;
539 }
540 }
541
542 kfree(osb->local_system_inodes);
543 osb->local_system_inodes = NULL;
544 }
545
546 /* We're allocating fs objects, use GFP_NOFS */
ocfs2_alloc_inode(struct super_block * sb)547 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
548 {
549 struct ocfs2_inode_info *oi;
550
551 oi = alloc_inode_sb(sb, ocfs2_inode_cachep, GFP_NOFS);
552 if (!oi)
553 return NULL;
554
555 oi->i_sync_tid = 0;
556 oi->i_datasync_tid = 0;
557 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
558
559 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
560 return &oi->vfs_inode;
561 }
562
ocfs2_free_inode(struct inode * inode)563 static void ocfs2_free_inode(struct inode *inode)
564 {
565 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
566 }
567
ocfs2_max_file_offset(unsigned int bbits,unsigned int cbits)568 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
569 unsigned int cbits)
570 {
571 unsigned int bytes = 1 << cbits;
572 unsigned int trim = bytes;
573 unsigned int bitshift = 32;
574
575 /*
576 * i_size and all block offsets in ocfs2 are always 64 bits
577 * wide. i_clusters is 32 bits, in cluster-sized units. So on
578 * 64 bit platforms, cluster size will be the limiting factor.
579 */
580
581 #if BITS_PER_LONG == 32
582 BUILD_BUG_ON(sizeof(sector_t) != 8);
583 /*
584 * We might be limited by page cache size.
585 */
586 if (bytes > PAGE_SIZE) {
587 bytes = PAGE_SIZE;
588 trim = 1;
589 /*
590 * Shift by 31 here so that we don't get larger than
591 * MAX_LFS_FILESIZE
592 */
593 bitshift = 31;
594 }
595 #endif
596
597 /*
598 * Trim by a whole cluster when we can actually approach the
599 * on-disk limits. Otherwise we can overflow i_clusters when
600 * an extent start is at the max offset.
601 */
602 return (((unsigned long long)bytes) << bitshift) - trim;
603 }
604
ocfs2_remount(struct super_block * sb,int * flags,char * data)605 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
606 {
607 int incompat_features;
608 int ret = 0;
609 struct mount_options parsed_options;
610 struct ocfs2_super *osb = OCFS2_SB(sb);
611 u32 tmp;
612
613 sync_filesystem(sb);
614
615 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
616 !ocfs2_check_set_options(sb, &parsed_options)) {
617 ret = -EINVAL;
618 goto out;
619 }
620
621 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
622 OCFS2_MOUNT_HB_NONE;
623 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
624 ret = -EINVAL;
625 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
626 goto out;
627 }
628
629 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
630 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
631 ret = -EINVAL;
632 mlog(ML_ERROR, "Cannot change data mode on remount\n");
633 goto out;
634 }
635
636 /* Probably don't want this on remount; it might
637 * mess with other nodes */
638 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
639 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
640 ret = -EINVAL;
641 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
642 goto out;
643 }
644
645 /* We're going to/from readonly mode. */
646 if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
647 /* Disable quota accounting before remounting RO */
648 if (*flags & SB_RDONLY) {
649 ret = ocfs2_susp_quotas(osb, 0);
650 if (ret < 0)
651 goto out;
652 }
653 /* Lock here so the check of HARD_RO and the potential
654 * setting of SOFT_RO is atomic. */
655 spin_lock(&osb->osb_lock);
656 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
657 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
658 ret = -EROFS;
659 goto unlock_osb;
660 }
661
662 if (*flags & SB_RDONLY) {
663 sb->s_flags |= SB_RDONLY;
664 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
665 } else {
666 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
667 mlog(ML_ERROR, "Cannot remount RDWR "
668 "filesystem due to previous errors.\n");
669 ret = -EROFS;
670 goto unlock_osb;
671 }
672 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
673 if (incompat_features) {
674 mlog(ML_ERROR, "Cannot remount RDWR because "
675 "of unsupported optional features "
676 "(%x).\n", incompat_features);
677 ret = -EINVAL;
678 goto unlock_osb;
679 }
680 sb->s_flags &= ~SB_RDONLY;
681 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
682 }
683 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
684 unlock_osb:
685 spin_unlock(&osb->osb_lock);
686 /* Enable quota accounting after remounting RW */
687 if (!ret && !(*flags & SB_RDONLY)) {
688 if (sb_any_quota_suspended(sb))
689 ret = ocfs2_susp_quotas(osb, 1);
690 else
691 ret = ocfs2_enable_quotas(osb);
692 if (ret < 0) {
693 /* Return back changes... */
694 spin_lock(&osb->osb_lock);
695 sb->s_flags |= SB_RDONLY;
696 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
697 spin_unlock(&osb->osb_lock);
698 goto out;
699 }
700 }
701 }
702
703 if (!ret) {
704 /* Only save off the new mount options in case of a successful
705 * remount. */
706 osb->s_mount_opt = parsed_options.mount_opt;
707 osb->s_atime_quantum = parsed_options.atime_quantum;
708 osb->preferred_slot = parsed_options.slot;
709 if (parsed_options.commit_interval)
710 osb->osb_commit_interval = parsed_options.commit_interval;
711
712 if (!ocfs2_is_hard_readonly(osb))
713 ocfs2_set_journal_params(osb);
714
715 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
716 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
717 SB_POSIXACL : 0);
718 }
719 out:
720 return ret;
721 }
722
ocfs2_sb_probe(struct super_block * sb,struct buffer_head ** bh,int * sector_size,struct ocfs2_blockcheck_stats * stats)723 static int ocfs2_sb_probe(struct super_block *sb,
724 struct buffer_head **bh,
725 int *sector_size,
726 struct ocfs2_blockcheck_stats *stats)
727 {
728 int status, tmpstat;
729 struct ocfs1_vol_disk_hdr *hdr;
730 struct ocfs2_dinode *di;
731 int blksize;
732
733 *bh = NULL;
734
735 /* may be > 512 */
736 *sector_size = bdev_logical_block_size(sb->s_bdev);
737 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
738 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
739 *sector_size, OCFS2_MAX_BLOCKSIZE);
740 status = -EINVAL;
741 goto bail;
742 }
743
744 /* Can this really happen? */
745 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
746 *sector_size = OCFS2_MIN_BLOCKSIZE;
747
748 /* check block zero for old format */
749 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
750 if (status < 0) {
751 mlog_errno(status);
752 goto bail;
753 }
754 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
755 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
756 mlog(ML_ERROR, "incompatible version: %u.%u\n",
757 hdr->major_version, hdr->minor_version);
758 status = -EINVAL;
759 }
760 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
761 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
762 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
763 hdr->signature);
764 status = -EINVAL;
765 }
766 brelse(*bh);
767 *bh = NULL;
768 if (status < 0) {
769 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
770 "upgraded before mounting with ocfs v2\n");
771 goto bail;
772 }
773
774 /*
775 * Now check at magic offset for 512, 1024, 2048, 4096
776 * blocksizes. 4096 is the maximum blocksize because it is
777 * the minimum clustersize.
778 */
779 status = -EINVAL;
780 for (blksize = *sector_size;
781 blksize <= OCFS2_MAX_BLOCKSIZE;
782 blksize <<= 1) {
783 tmpstat = ocfs2_get_sector(sb, bh,
784 OCFS2_SUPER_BLOCK_BLKNO,
785 blksize);
786 if (tmpstat < 0) {
787 status = tmpstat;
788 mlog_errno(status);
789 break;
790 }
791 di = (struct ocfs2_dinode *) (*bh)->b_data;
792 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
793 spin_lock_init(&stats->b_lock);
794 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
795 if (tmpstat < 0) {
796 brelse(*bh);
797 *bh = NULL;
798 }
799 if (tmpstat != -EAGAIN) {
800 status = tmpstat;
801 break;
802 }
803 }
804
805 bail:
806 return status;
807 }
808
ocfs2_verify_heartbeat(struct ocfs2_super * osb)809 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
810 {
811 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
812
813 if (osb->s_mount_opt & hb_enabled) {
814 if (ocfs2_mount_local(osb)) {
815 mlog(ML_ERROR, "Cannot heartbeat on a locally "
816 "mounted device.\n");
817 return -EINVAL;
818 }
819 if (ocfs2_userspace_stack(osb)) {
820 mlog(ML_ERROR, "Userspace stack expected, but "
821 "o2cb heartbeat arguments passed to mount\n");
822 return -EINVAL;
823 }
824 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
825 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
826 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
827 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
828 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
829 return -EINVAL;
830 }
831 }
832
833 if (!(osb->s_mount_opt & hb_enabled)) {
834 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
835 !ocfs2_userspace_stack(osb)) {
836 mlog(ML_ERROR, "Heartbeat has to be started to mount "
837 "a read-write clustered device.\n");
838 return -EINVAL;
839 }
840 }
841
842 return 0;
843 }
844
845 /*
846 * If we're using a userspace stack, mount should have passed
847 * a name that matches the disk. If not, mount should not
848 * have passed a stack.
849 */
ocfs2_verify_userspace_stack(struct ocfs2_super * osb,struct mount_options * mopt)850 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
851 struct mount_options *mopt)
852 {
853 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
854 mlog(ML_ERROR,
855 "cluster stack passed to mount, but this filesystem "
856 "does not support it\n");
857 return -EINVAL;
858 }
859
860 if (ocfs2_userspace_stack(osb) &&
861 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
862 OCFS2_STACK_LABEL_LEN)) {
863 mlog(ML_ERROR,
864 "cluster stack passed to mount (\"%s\") does not "
865 "match the filesystem (\"%s\")\n",
866 mopt->cluster_stack,
867 osb->osb_cluster_stack);
868 return -EINVAL;
869 }
870
871 return 0;
872 }
873
ocfs2_susp_quotas(struct ocfs2_super * osb,int unsuspend)874 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
875 {
876 int type;
877 struct super_block *sb = osb->sb;
878 unsigned int feature[OCFS2_MAXQUOTAS] = {
879 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
880 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
881 int status = 0;
882
883 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
884 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
885 continue;
886 if (unsuspend)
887 status = dquot_resume(sb, type);
888 else {
889 struct ocfs2_mem_dqinfo *oinfo;
890
891 /* Cancel periodic syncing before suspending */
892 oinfo = sb_dqinfo(sb, type)->dqi_priv;
893 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
894 status = dquot_suspend(sb, type);
895 }
896 if (status < 0)
897 break;
898 }
899 if (status < 0)
900 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
901 "remount (error = %d).\n", status);
902 return status;
903 }
904
ocfs2_enable_quotas(struct ocfs2_super * osb)905 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
906 {
907 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
908 struct super_block *sb = osb->sb;
909 unsigned int feature[OCFS2_MAXQUOTAS] = {
910 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
911 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
912 unsigned int ino[OCFS2_MAXQUOTAS] = {
913 LOCAL_USER_QUOTA_SYSTEM_INODE,
914 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
915 int status;
916 int type;
917
918 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
919 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
920 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
921 continue;
922 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
923 osb->slot_num);
924 if (!inode[type]) {
925 status = -ENOENT;
926 goto out_quota_off;
927 }
928 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2,
929 DQUOT_USAGE_ENABLED);
930 if (status < 0)
931 goto out_quota_off;
932 }
933
934 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
935 iput(inode[type]);
936 return 0;
937 out_quota_off:
938 ocfs2_disable_quotas(osb);
939 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
940 iput(inode[type]);
941 mlog_errno(status);
942 return status;
943 }
944
ocfs2_disable_quotas(struct ocfs2_super * osb)945 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
946 {
947 int type;
948 struct inode *inode;
949 struct super_block *sb = osb->sb;
950 struct ocfs2_mem_dqinfo *oinfo;
951
952 /* We mostly ignore errors in this function because there's not much
953 * we can do when we see them */
954 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
955 if (!sb_has_quota_loaded(sb, type))
956 continue;
957 if (!sb_has_quota_suspended(sb, type)) {
958 oinfo = sb_dqinfo(sb, type)->dqi_priv;
959 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
960 }
961 inode = igrab(sb->s_dquot.files[type]);
962 /* Turn off quotas. This will remove all dquot structures from
963 * memory and so they will be automatically synced to global
964 * quota files */
965 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
966 DQUOT_LIMITS_ENABLED);
967 iput(inode);
968 }
969 }
970
ocfs2_fill_super(struct super_block * sb,void * data,int silent)971 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
972 {
973 struct dentry *root;
974 int status, sector_size;
975 struct mount_options parsed_options;
976 struct inode *inode = NULL;
977 struct ocfs2_super *osb = NULL;
978 struct buffer_head *bh = NULL;
979 char nodestr[12];
980 struct ocfs2_blockcheck_stats stats;
981
982 trace_ocfs2_fill_super(sb, data, silent);
983
984 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
985 status = -EINVAL;
986 goto out;
987 }
988
989 /* probe for superblock */
990 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
991 if (status < 0) {
992 mlog(ML_ERROR, "superblock probe failed!\n");
993 goto out;
994 }
995
996 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
997 brelse(bh);
998 bh = NULL;
999 if (status < 0)
1000 goto out;
1001
1002 osb = OCFS2_SB(sb);
1003
1004 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1005 status = -EINVAL;
1006 goto out_super;
1007 }
1008 osb->s_mount_opt = parsed_options.mount_opt;
1009 osb->s_atime_quantum = parsed_options.atime_quantum;
1010 osb->preferred_slot = parsed_options.slot;
1011 osb->osb_commit_interval = parsed_options.commit_interval;
1012
1013 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1014 osb->osb_resv_level = parsed_options.resv_level;
1015 osb->osb_dir_resv_level = parsed_options.resv_level;
1016 if (parsed_options.dir_resv_level == -1)
1017 osb->osb_dir_resv_level = parsed_options.resv_level;
1018 else
1019 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1020
1021 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1022 if (status)
1023 goto out_super;
1024
1025 sb->s_magic = OCFS2_SUPER_MAGIC;
1026
1027 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1028 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1029
1030 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1031 * heartbeat=none */
1032 if (bdev_read_only(sb->s_bdev)) {
1033 if (!sb_rdonly(sb)) {
1034 status = -EACCES;
1035 mlog(ML_ERROR, "Readonly device detected but readonly "
1036 "mount was not specified.\n");
1037 goto out_super;
1038 }
1039
1040 /* You should not be able to start a local heartbeat
1041 * on a readonly device. */
1042 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1043 status = -EROFS;
1044 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1045 "device.\n");
1046 goto out_super;
1047 }
1048
1049 status = ocfs2_check_journals_nolocks(osb);
1050 if (status < 0) {
1051 if (status == -EROFS)
1052 mlog(ML_ERROR, "Recovery required on readonly "
1053 "file system, but write access is "
1054 "unavailable.\n");
1055 goto out_super;
1056 }
1057
1058 ocfs2_set_ro_flag(osb, 1);
1059
1060 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1061 "Cluster services will not be used for this mount. "
1062 "Recovery will be skipped.\n", osb->dev_str);
1063 }
1064
1065 if (!ocfs2_is_hard_readonly(osb)) {
1066 if (sb_rdonly(sb))
1067 ocfs2_set_ro_flag(osb, 0);
1068 }
1069
1070 status = ocfs2_verify_heartbeat(osb);
1071 if (status < 0)
1072 goto out_super;
1073
1074 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1075 ocfs2_debugfs_root);
1076
1077 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1078 osb, &ocfs2_osb_debug_fops);
1079
1080 if (ocfs2_meta_ecc(osb)) {
1081 ocfs2_initialize_journal_triggers(sb, osb->s_journal_triggers);
1082 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1083 osb->osb_debug_root);
1084 }
1085
1086 status = ocfs2_mount_volume(sb);
1087 if (status < 0)
1088 goto out_debugfs;
1089
1090 if (osb->root_inode)
1091 inode = igrab(osb->root_inode);
1092
1093 if (!inode) {
1094 status = -EIO;
1095 goto out_dismount;
1096 }
1097
1098 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1099 &ocfs2_kset->kobj);
1100 if (!osb->osb_dev_kset) {
1101 status = -ENOMEM;
1102 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1103 goto out_dismount;
1104 }
1105
1106 /* Create filecheck sysfs related directories/files at
1107 * /sys/fs/ocfs2/<devname>/filecheck */
1108 if (ocfs2_filecheck_create_sysfs(osb)) {
1109 status = -ENOMEM;
1110 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1111 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1112 goto out_dismount;
1113 }
1114
1115 root = d_make_root(inode);
1116 if (!root) {
1117 status = -ENOMEM;
1118 goto out_dismount;
1119 }
1120
1121 sb->s_root = root;
1122
1123 ocfs2_complete_mount_recovery(osb);
1124
1125 if (ocfs2_mount_local(osb))
1126 snprintf(nodestr, sizeof(nodestr), "local");
1127 else
1128 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1129
1130 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1131 "with %s data mode.\n",
1132 osb->dev_str, nodestr, osb->slot_num,
1133 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1134 "ordered");
1135
1136 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1137 wake_up(&osb->osb_mount_event);
1138
1139 /* Now we can initialize quotas because we can afford to wait
1140 * for cluster locks recovery now. That also means that truncation
1141 * log recovery can happen but that waits for proper quota setup */
1142 if (!sb_rdonly(sb)) {
1143 status = ocfs2_enable_quotas(osb);
1144 if (status < 0) {
1145 /* We have to err-out specially here because
1146 * s_root is already set */
1147 mlog_errno(status);
1148 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1149 wake_up(&osb->osb_mount_event);
1150 return status;
1151 }
1152 }
1153
1154 ocfs2_complete_quota_recovery(osb);
1155
1156 /* Now we wake up again for processes waiting for quotas */
1157 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1158 wake_up(&osb->osb_mount_event);
1159
1160 /* Start this when the mount is almost sure of being successful */
1161 ocfs2_orphan_scan_start(osb);
1162
1163 return status;
1164
1165 out_dismount:
1166 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1167 wake_up(&osb->osb_mount_event);
1168 ocfs2_free_replay_slots(osb);
1169 ocfs2_dismount_volume(sb, 1);
1170 goto out;
1171
1172 out_debugfs:
1173 debugfs_remove_recursive(osb->osb_debug_root);
1174 out_super:
1175 ocfs2_release_system_inodes(osb);
1176 kfree(osb->recovery_map);
1177 ocfs2_delete_osb(osb);
1178 kfree(osb);
1179 out:
1180 mlog_errno(status);
1181
1182 return status;
1183 }
1184
ocfs2_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1185 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1186 int flags,
1187 const char *dev_name,
1188 void *data)
1189 {
1190 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1191 }
1192
1193 static struct file_system_type ocfs2_fs_type = {
1194 .owner = THIS_MODULE,
1195 .name = "ocfs2",
1196 .mount = ocfs2_mount,
1197 .kill_sb = kill_block_super,
1198 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1199 .next = NULL
1200 };
1201 MODULE_ALIAS_FS("ocfs2");
1202
ocfs2_check_set_options(struct super_block * sb,struct mount_options * options)1203 static int ocfs2_check_set_options(struct super_block *sb,
1204 struct mount_options *options)
1205 {
1206 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1207 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1208 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1209 mlog(ML_ERROR, "User quotas were requested, but this "
1210 "filesystem does not have the feature enabled.\n");
1211 return 0;
1212 }
1213 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1214 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1215 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1216 mlog(ML_ERROR, "Group quotas were requested, but this "
1217 "filesystem does not have the feature enabled.\n");
1218 return 0;
1219 }
1220 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1221 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1222 mlog(ML_ERROR, "ACL support requested but extended attributes "
1223 "feature is not enabled\n");
1224 return 0;
1225 }
1226 /* No ACL setting specified? Use XATTR feature... */
1227 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1228 OCFS2_MOUNT_NO_POSIX_ACL))) {
1229 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1230 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1231 else
1232 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1233 }
1234 return 1;
1235 }
1236
ocfs2_parse_options(struct super_block * sb,char * options,struct mount_options * mopt,int is_remount)1237 static int ocfs2_parse_options(struct super_block *sb,
1238 char *options,
1239 struct mount_options *mopt,
1240 int is_remount)
1241 {
1242 int status, user_stack = 0;
1243 char *p;
1244 u32 tmp;
1245 int token, option;
1246 substring_t args[MAX_OPT_ARGS];
1247
1248 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1249
1250 mopt->commit_interval = 0;
1251 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1252 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1253 mopt->slot = OCFS2_INVALID_SLOT;
1254 mopt->localalloc_opt = -1;
1255 mopt->cluster_stack[0] = '\0';
1256 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1257 mopt->dir_resv_level = -1;
1258
1259 if (!options) {
1260 status = 1;
1261 goto bail;
1262 }
1263
1264 while ((p = strsep(&options, ",")) != NULL) {
1265 if (!*p)
1266 continue;
1267
1268 token = match_token(p, tokens, args);
1269 switch (token) {
1270 case Opt_hb_local:
1271 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1272 break;
1273 case Opt_hb_none:
1274 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1275 break;
1276 case Opt_hb_global:
1277 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1278 break;
1279 case Opt_barrier:
1280 if (match_int(&args[0], &option)) {
1281 status = 0;
1282 goto bail;
1283 }
1284 if (option)
1285 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1286 else
1287 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1288 break;
1289 case Opt_intr:
1290 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1291 break;
1292 case Opt_nointr:
1293 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1294 break;
1295 case Opt_err_panic:
1296 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1297 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1298 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1299 break;
1300 case Opt_err_ro:
1301 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1302 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1303 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1304 break;
1305 case Opt_err_cont:
1306 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1307 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1308 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1309 break;
1310 case Opt_data_ordered:
1311 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1312 break;
1313 case Opt_data_writeback:
1314 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1315 break;
1316 case Opt_user_xattr:
1317 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1318 break;
1319 case Opt_nouser_xattr:
1320 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1321 break;
1322 case Opt_atime_quantum:
1323 if (match_int(&args[0], &option)) {
1324 status = 0;
1325 goto bail;
1326 }
1327 if (option >= 0)
1328 mopt->atime_quantum = option;
1329 break;
1330 case Opt_slot:
1331 if (match_int(&args[0], &option)) {
1332 status = 0;
1333 goto bail;
1334 }
1335 if (option)
1336 mopt->slot = (u16)option;
1337 break;
1338 case Opt_commit:
1339 if (match_int(&args[0], &option)) {
1340 status = 0;
1341 goto bail;
1342 }
1343 if (option < 0)
1344 return 0;
1345 if (option == 0)
1346 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1347 mopt->commit_interval = HZ * option;
1348 break;
1349 case Opt_localalloc:
1350 if (match_int(&args[0], &option)) {
1351 status = 0;
1352 goto bail;
1353 }
1354 if (option >= 0)
1355 mopt->localalloc_opt = option;
1356 break;
1357 case Opt_localflocks:
1358 /*
1359 * Changing this during remount could race
1360 * flock() requests, or "unbalance" existing
1361 * ones (e.g., a lock is taken in one mode but
1362 * dropped in the other). If users care enough
1363 * to flip locking modes during remount, we
1364 * could add a "local" flag to individual
1365 * flock structures for proper tracking of
1366 * state.
1367 */
1368 if (!is_remount)
1369 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1370 break;
1371 case Opt_stack:
1372 /* Check both that the option we were passed
1373 * is of the right length and that it is a proper
1374 * string of the right length.
1375 */
1376 if (((args[0].to - args[0].from) !=
1377 OCFS2_STACK_LABEL_LEN) ||
1378 (strnlen(args[0].from,
1379 OCFS2_STACK_LABEL_LEN) !=
1380 OCFS2_STACK_LABEL_LEN)) {
1381 mlog(ML_ERROR,
1382 "Invalid cluster_stack option\n");
1383 status = 0;
1384 goto bail;
1385 }
1386 memcpy(mopt->cluster_stack, args[0].from,
1387 OCFS2_STACK_LABEL_LEN);
1388 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1389 /*
1390 * Open code the memcmp here as we don't have
1391 * an osb to pass to
1392 * ocfs2_userspace_stack().
1393 */
1394 if (memcmp(mopt->cluster_stack,
1395 OCFS2_CLASSIC_CLUSTER_STACK,
1396 OCFS2_STACK_LABEL_LEN))
1397 user_stack = 1;
1398 break;
1399 case Opt_inode64:
1400 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1401 break;
1402 case Opt_usrquota:
1403 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1404 break;
1405 case Opt_grpquota:
1406 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1407 break;
1408 case Opt_coherency_buffered:
1409 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1410 break;
1411 case Opt_coherency_full:
1412 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1413 break;
1414 case Opt_acl:
1415 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1416 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1417 break;
1418 case Opt_noacl:
1419 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1420 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1421 break;
1422 case Opt_resv_level:
1423 if (is_remount)
1424 break;
1425 if (match_int(&args[0], &option)) {
1426 status = 0;
1427 goto bail;
1428 }
1429 if (option >= OCFS2_MIN_RESV_LEVEL &&
1430 option < OCFS2_MAX_RESV_LEVEL)
1431 mopt->resv_level = option;
1432 break;
1433 case Opt_dir_resv_level:
1434 if (is_remount)
1435 break;
1436 if (match_int(&args[0], &option)) {
1437 status = 0;
1438 goto bail;
1439 }
1440 if (option >= OCFS2_MIN_RESV_LEVEL &&
1441 option < OCFS2_MAX_RESV_LEVEL)
1442 mopt->dir_resv_level = option;
1443 break;
1444 case Opt_journal_async_commit:
1445 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1446 break;
1447 default:
1448 mlog(ML_ERROR,
1449 "Unrecognized mount option \"%s\" "
1450 "or missing value\n", p);
1451 status = 0;
1452 goto bail;
1453 }
1454 }
1455
1456 if (user_stack == 0) {
1457 /* Ensure only one heartbeat mode */
1458 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1459 OCFS2_MOUNT_HB_GLOBAL |
1460 OCFS2_MOUNT_HB_NONE);
1461 if (hweight32(tmp) != 1) {
1462 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1463 status = 0;
1464 goto bail;
1465 }
1466 }
1467
1468 status = 1;
1469
1470 bail:
1471 return status;
1472 }
1473
ocfs2_show_options(struct seq_file * s,struct dentry * root)1474 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1475 {
1476 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1477 unsigned long opts = osb->s_mount_opt;
1478 unsigned int local_alloc_megs;
1479
1480 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1481 seq_printf(s, ",_netdev");
1482 if (opts & OCFS2_MOUNT_HB_LOCAL)
1483 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1484 else
1485 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1486 } else
1487 seq_printf(s, ",%s", OCFS2_HB_NONE);
1488
1489 if (opts & OCFS2_MOUNT_NOINTR)
1490 seq_printf(s, ",nointr");
1491
1492 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1493 seq_printf(s, ",data=writeback");
1494 else
1495 seq_printf(s, ",data=ordered");
1496
1497 if (opts & OCFS2_MOUNT_BARRIER)
1498 seq_printf(s, ",barrier=1");
1499
1500 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1501 seq_printf(s, ",errors=panic");
1502 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1503 seq_printf(s, ",errors=continue");
1504 else
1505 seq_printf(s, ",errors=remount-ro");
1506
1507 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1508 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1509
1510 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1511
1512 if (osb->osb_commit_interval)
1513 seq_printf(s, ",commit=%u",
1514 (unsigned) (osb->osb_commit_interval / HZ));
1515
1516 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1517 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1518 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1519
1520 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1521 seq_printf(s, ",localflocks,");
1522
1523 if (osb->osb_cluster_stack[0])
1524 seq_show_option(s, "cluster_stack", osb->osb_cluster_stack);
1525 if (opts & OCFS2_MOUNT_USRQUOTA)
1526 seq_printf(s, ",usrquota");
1527 if (opts & OCFS2_MOUNT_GRPQUOTA)
1528 seq_printf(s, ",grpquota");
1529
1530 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1531 seq_printf(s, ",coherency=buffered");
1532 else
1533 seq_printf(s, ",coherency=full");
1534
1535 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1536 seq_printf(s, ",nouser_xattr");
1537 else
1538 seq_printf(s, ",user_xattr");
1539
1540 if (opts & OCFS2_MOUNT_INODE64)
1541 seq_printf(s, ",inode64");
1542
1543 if (opts & OCFS2_MOUNT_POSIX_ACL)
1544 seq_printf(s, ",acl");
1545 else
1546 seq_printf(s, ",noacl");
1547
1548 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1549 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1550
1551 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1552 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1553
1554 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1555 seq_printf(s, ",journal_async_commit");
1556
1557 return 0;
1558 }
1559
ocfs2_init(void)1560 static int __init ocfs2_init(void)
1561 {
1562 int status;
1563
1564 status = init_ocfs2_uptodate_cache();
1565 if (status < 0)
1566 goto out1;
1567
1568 status = ocfs2_initialize_mem_caches();
1569 if (status < 0)
1570 goto out2;
1571
1572 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1573
1574 ocfs2_set_locking_protocol();
1575
1576 status = register_quota_format(&ocfs2_quota_format);
1577 if (status < 0)
1578 goto out3;
1579 status = register_filesystem(&ocfs2_fs_type);
1580 if (!status)
1581 return 0;
1582
1583 unregister_quota_format(&ocfs2_quota_format);
1584 out3:
1585 debugfs_remove(ocfs2_debugfs_root);
1586 ocfs2_free_mem_caches();
1587 out2:
1588 exit_ocfs2_uptodate_cache();
1589 out1:
1590 mlog_errno(status);
1591 return status;
1592 }
1593
ocfs2_exit(void)1594 static void __exit ocfs2_exit(void)
1595 {
1596 unregister_quota_format(&ocfs2_quota_format);
1597
1598 debugfs_remove(ocfs2_debugfs_root);
1599
1600 ocfs2_free_mem_caches();
1601
1602 unregister_filesystem(&ocfs2_fs_type);
1603
1604 exit_ocfs2_uptodate_cache();
1605 }
1606
ocfs2_put_super(struct super_block * sb)1607 static void ocfs2_put_super(struct super_block *sb)
1608 {
1609 trace_ocfs2_put_super(sb);
1610
1611 ocfs2_sync_blockdev(sb);
1612 ocfs2_dismount_volume(sb, 0);
1613 }
1614
ocfs2_statfs(struct dentry * dentry,struct kstatfs * buf)1615 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1616 {
1617 struct ocfs2_super *osb;
1618 u32 numbits, freebits;
1619 int status;
1620 struct ocfs2_dinode *bm_lock;
1621 struct buffer_head *bh = NULL;
1622 struct inode *inode = NULL;
1623
1624 trace_ocfs2_statfs(dentry->d_sb, buf);
1625
1626 osb = OCFS2_SB(dentry->d_sb);
1627
1628 inode = ocfs2_get_system_file_inode(osb,
1629 GLOBAL_BITMAP_SYSTEM_INODE,
1630 OCFS2_INVALID_SLOT);
1631 if (!inode) {
1632 mlog(ML_ERROR, "failed to get bitmap inode\n");
1633 status = -EIO;
1634 goto bail;
1635 }
1636
1637 status = ocfs2_inode_lock(inode, &bh, 0);
1638 if (status < 0) {
1639 mlog_errno(status);
1640 goto bail;
1641 }
1642
1643 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1644
1645 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1646 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1647
1648 buf->f_type = OCFS2_SUPER_MAGIC;
1649 buf->f_bsize = dentry->d_sb->s_blocksize;
1650 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1651 buf->f_blocks = ((sector_t) numbits) *
1652 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1653 buf->f_bfree = ((sector_t) freebits) *
1654 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1655 buf->f_bavail = buf->f_bfree;
1656 buf->f_files = numbits;
1657 buf->f_ffree = freebits;
1658 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1659 & 0xFFFFFFFFUL;
1660 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1661 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1662
1663 brelse(bh);
1664
1665 ocfs2_inode_unlock(inode, 0);
1666 status = 0;
1667 bail:
1668 iput(inode);
1669
1670 if (status)
1671 mlog_errno(status);
1672
1673 return status;
1674 }
1675
ocfs2_inode_init_once(void * data)1676 static void ocfs2_inode_init_once(void *data)
1677 {
1678 struct ocfs2_inode_info *oi = data;
1679
1680 oi->ip_flags = 0;
1681 oi->ip_open_count = 0;
1682 spin_lock_init(&oi->ip_lock);
1683 ocfs2_extent_map_init(&oi->vfs_inode);
1684 INIT_LIST_HEAD(&oi->ip_io_markers);
1685 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1686 oi->ip_dir_start_lookup = 0;
1687 init_rwsem(&oi->ip_alloc_sem);
1688 init_rwsem(&oi->ip_xattr_sem);
1689 mutex_init(&oi->ip_io_mutex);
1690
1691 oi->ip_blkno = 0ULL;
1692 oi->ip_clusters = 0;
1693 oi->ip_next_orphan = NULL;
1694
1695 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1696
1697 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1698 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1699 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1700
1701 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1702 &ocfs2_inode_caching_ops);
1703
1704 inode_init_once(&oi->vfs_inode);
1705 }
1706
ocfs2_initialize_mem_caches(void)1707 static int ocfs2_initialize_mem_caches(void)
1708 {
1709 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1710 sizeof(struct ocfs2_inode_info),
1711 0,
1712 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1713 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1714 ocfs2_inode_init_once);
1715 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1716 sizeof(struct ocfs2_dquot),
1717 0,
1718 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1719 SLAB_MEM_SPREAD),
1720 NULL);
1721 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1722 sizeof(struct ocfs2_quota_chunk),
1723 0,
1724 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1725 NULL);
1726 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1727 !ocfs2_qf_chunk_cachep) {
1728 kmem_cache_destroy(ocfs2_inode_cachep);
1729 kmem_cache_destroy(ocfs2_dquot_cachep);
1730 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1731 return -ENOMEM;
1732 }
1733
1734 return 0;
1735 }
1736
ocfs2_free_mem_caches(void)1737 static void ocfs2_free_mem_caches(void)
1738 {
1739 /*
1740 * Make sure all delayed rcu free inodes are flushed before we
1741 * destroy cache.
1742 */
1743 rcu_barrier();
1744 kmem_cache_destroy(ocfs2_inode_cachep);
1745 ocfs2_inode_cachep = NULL;
1746
1747 kmem_cache_destroy(ocfs2_dquot_cachep);
1748 ocfs2_dquot_cachep = NULL;
1749
1750 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1751 ocfs2_qf_chunk_cachep = NULL;
1752 }
1753
ocfs2_get_sector(struct super_block * sb,struct buffer_head ** bh,int block,int sect_size)1754 static int ocfs2_get_sector(struct super_block *sb,
1755 struct buffer_head **bh,
1756 int block,
1757 int sect_size)
1758 {
1759 if (!sb_set_blocksize(sb, sect_size)) {
1760 mlog(ML_ERROR, "unable to set blocksize\n");
1761 return -EIO;
1762 }
1763
1764 *bh = sb_getblk(sb, block);
1765 if (!*bh) {
1766 mlog_errno(-ENOMEM);
1767 return -ENOMEM;
1768 }
1769 lock_buffer(*bh);
1770 if (!buffer_dirty(*bh))
1771 clear_buffer_uptodate(*bh);
1772 unlock_buffer(*bh);
1773 if (bh_read(*bh, 0) < 0) {
1774 mlog_errno(-EIO);
1775 brelse(*bh);
1776 *bh = NULL;
1777 return -EIO;
1778 }
1779
1780 return 0;
1781 }
1782
ocfs2_mount_volume(struct super_block * sb)1783 static int ocfs2_mount_volume(struct super_block *sb)
1784 {
1785 int status = 0;
1786 struct ocfs2_super *osb = OCFS2_SB(sb);
1787
1788 if (ocfs2_is_hard_readonly(osb))
1789 goto out;
1790
1791 mutex_init(&osb->obs_trim_fs_mutex);
1792
1793 status = ocfs2_dlm_init(osb);
1794 if (status < 0) {
1795 mlog_errno(status);
1796 if (status == -EBADR && ocfs2_userspace_stack(osb))
1797 mlog(ML_ERROR, "couldn't mount because cluster name on"
1798 " disk does not match the running cluster name.\n");
1799 goto out;
1800 }
1801
1802 status = ocfs2_super_lock(osb, 1);
1803 if (status < 0) {
1804 mlog_errno(status);
1805 goto out_dlm;
1806 }
1807
1808 /* This will load up the node map and add ourselves to it. */
1809 status = ocfs2_find_slot(osb);
1810 if (status < 0) {
1811 mlog_errno(status);
1812 goto out_super_lock;
1813 }
1814
1815 /* load all node-local system inodes */
1816 status = ocfs2_init_local_system_inodes(osb);
1817 if (status < 0) {
1818 mlog_errno(status);
1819 goto out_super_lock;
1820 }
1821
1822 status = ocfs2_check_volume(osb);
1823 if (status < 0) {
1824 mlog_errno(status);
1825 goto out_system_inodes;
1826 }
1827
1828 status = ocfs2_truncate_log_init(osb);
1829 if (status < 0) {
1830 mlog_errno(status);
1831 goto out_check_volume;
1832 }
1833
1834 ocfs2_super_unlock(osb, 1);
1835 return 0;
1836
1837 out_check_volume:
1838 ocfs2_free_replay_slots(osb);
1839 out_system_inodes:
1840 if (osb->local_alloc_state == OCFS2_LA_ENABLED)
1841 ocfs2_shutdown_local_alloc(osb);
1842 ocfs2_release_system_inodes(osb);
1843 /* before journal shutdown, we should release slot_info */
1844 ocfs2_free_slot_info(osb);
1845 ocfs2_journal_shutdown(osb);
1846 out_super_lock:
1847 ocfs2_super_unlock(osb, 1);
1848 out_dlm:
1849 ocfs2_dlm_shutdown(osb, 0);
1850 out:
1851 return status;
1852 }
1853
ocfs2_dismount_volume(struct super_block * sb,int mnt_err)1854 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1855 {
1856 int tmp, hangup_needed = 0;
1857 struct ocfs2_super *osb = NULL;
1858 char nodestr[12];
1859
1860 trace_ocfs2_dismount_volume(sb);
1861
1862 BUG_ON(!sb);
1863 osb = OCFS2_SB(sb);
1864 BUG_ON(!osb);
1865
1866 /* Remove file check sysfs related directores/files,
1867 * and wait for the pending file check operations */
1868 ocfs2_filecheck_remove_sysfs(osb);
1869
1870 kset_unregister(osb->osb_dev_kset);
1871
1872 /* Orphan scan should be stopped as early as possible */
1873 ocfs2_orphan_scan_stop(osb);
1874
1875 ocfs2_disable_quotas(osb);
1876
1877 /* All dquots should be freed by now */
1878 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1879 /* Wait for worker to be done with the work structure in osb */
1880 cancel_work_sync(&osb->dquot_drop_work);
1881
1882 ocfs2_shutdown_local_alloc(osb);
1883
1884 ocfs2_truncate_log_shutdown(osb);
1885
1886 /* This will disable recovery and flush any recovery work. */
1887 ocfs2_recovery_exit(osb);
1888
1889 ocfs2_sync_blockdev(sb);
1890
1891 ocfs2_purge_refcount_trees(osb);
1892
1893 /* No cluster connection means we've failed during mount, so skip
1894 * all the steps which depended on that to complete. */
1895 if (osb->cconn) {
1896 tmp = ocfs2_super_lock(osb, 1);
1897 if (tmp < 0) {
1898 mlog_errno(tmp);
1899 return;
1900 }
1901 }
1902
1903 if (osb->slot_num != OCFS2_INVALID_SLOT)
1904 ocfs2_put_slot(osb);
1905
1906 if (osb->cconn)
1907 ocfs2_super_unlock(osb, 1);
1908
1909 ocfs2_release_system_inodes(osb);
1910
1911 ocfs2_journal_shutdown(osb);
1912
1913 /*
1914 * If we're dismounting due to mount error, mount.ocfs2 will clean
1915 * up heartbeat. If we're a local mount, there is no heartbeat.
1916 * If we failed before we got a uuid_str yet, we can't stop
1917 * heartbeat. Otherwise, do it.
1918 */
1919 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1920 !ocfs2_is_hard_readonly(osb))
1921 hangup_needed = 1;
1922
1923 ocfs2_dlm_shutdown(osb, hangup_needed);
1924
1925 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1926 debugfs_remove_recursive(osb->osb_debug_root);
1927
1928 if (hangup_needed)
1929 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1930
1931 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1932
1933 if (ocfs2_mount_local(osb))
1934 snprintf(nodestr, sizeof(nodestr), "local");
1935 else
1936 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1937
1938 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1939 osb->dev_str, nodestr);
1940
1941 ocfs2_delete_osb(osb);
1942 kfree(osb);
1943 sb->s_dev = 0;
1944 sb->s_fs_info = NULL;
1945 }
1946
ocfs2_setup_osb_uuid(struct ocfs2_super * osb,const unsigned char * uuid,unsigned uuid_bytes)1947 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1948 unsigned uuid_bytes)
1949 {
1950 int i, ret;
1951 char *ptr;
1952
1953 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1954
1955 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1956 if (osb->uuid_str == NULL)
1957 return -ENOMEM;
1958
1959 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1960 /* print with null */
1961 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1962 if (ret != 2) /* drop super cleans up */
1963 return -EINVAL;
1964 /* then only advance past the last char */
1965 ptr += 2;
1966 }
1967
1968 return 0;
1969 }
1970
1971 /* Make sure entire volume is addressable by our journal. Requires
1972 osb_clusters_at_boot to be valid and for the journal to have been
1973 initialized by ocfs2_journal_init(). */
ocfs2_journal_addressable(struct ocfs2_super * osb)1974 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1975 {
1976 int status = 0;
1977 u64 max_block =
1978 ocfs2_clusters_to_blocks(osb->sb,
1979 osb->osb_clusters_at_boot) - 1;
1980
1981 /* 32-bit block number is always OK. */
1982 if (max_block <= (u32)~0ULL)
1983 goto out;
1984
1985 /* Volume is "huge", so see if our journal is new enough to
1986 support it. */
1987 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1988 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1989 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1990 JBD2_FEATURE_INCOMPAT_64BIT))) {
1991 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1992 "Enable the 'block64' journal option with tunefs.ocfs2");
1993 status = -EFBIG;
1994 goto out;
1995 }
1996
1997 out:
1998 return status;
1999 }
2000
ocfs2_initialize_super(struct super_block * sb,struct buffer_head * bh,int sector_size,struct ocfs2_blockcheck_stats * stats)2001 static int ocfs2_initialize_super(struct super_block *sb,
2002 struct buffer_head *bh,
2003 int sector_size,
2004 struct ocfs2_blockcheck_stats *stats)
2005 {
2006 int status;
2007 int i, cbits, bbits;
2008 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2009 struct inode *inode = NULL;
2010 struct ocfs2_super *osb;
2011 u64 total_blocks;
2012
2013 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2014 if (!osb) {
2015 status = -ENOMEM;
2016 mlog_errno(status);
2017 goto out;
2018 }
2019
2020 sb->s_fs_info = osb;
2021 sb->s_op = &ocfs2_sops;
2022 sb->s_d_op = &ocfs2_dentry_ops;
2023 sb->s_export_op = &ocfs2_export_ops;
2024 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2025 sb->dq_op = &ocfs2_quota_operations;
2026 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2027 sb->s_xattr = ocfs2_xattr_handlers;
2028 sb->s_time_gran = 1;
2029 sb->s_flags |= SB_NOATIME;
2030 /* this is needed to support O_LARGEFILE */
2031 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2032 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2033 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2034 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2035 sizeof(di->id2.i_super.s_uuid));
2036
2037 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2038
2039 for (i = 0; i < 3; i++)
2040 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2041 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2042
2043 osb->sb = sb;
2044 osb->s_sectsize_bits = blksize_bits(sector_size);
2045 BUG_ON(!osb->s_sectsize_bits);
2046
2047 spin_lock_init(&osb->dc_task_lock);
2048 init_waitqueue_head(&osb->dc_event);
2049 osb->dc_work_sequence = 0;
2050 osb->dc_wake_sequence = 0;
2051 INIT_LIST_HEAD(&osb->blocked_lock_list);
2052 osb->blocked_lock_count = 0;
2053 spin_lock_init(&osb->osb_lock);
2054 spin_lock_init(&osb->osb_xattr_lock);
2055 ocfs2_init_steal_slots(osb);
2056
2057 mutex_init(&osb->system_file_mutex);
2058
2059 atomic_set(&osb->alloc_stats.moves, 0);
2060 atomic_set(&osb->alloc_stats.local_data, 0);
2061 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2062 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2063 atomic_set(&osb->alloc_stats.bg_extends, 0);
2064
2065 /* Copy the blockcheck stats from the superblock probe */
2066 osb->osb_ecc_stats = *stats;
2067
2068 ocfs2_init_node_maps(osb);
2069
2070 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2071 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2072
2073 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2074 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2075 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2076 osb->max_slots);
2077 status = -EINVAL;
2078 goto out;
2079 }
2080
2081 ocfs2_orphan_scan_init(osb);
2082
2083 status = ocfs2_recovery_init(osb);
2084 if (status) {
2085 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2086 mlog_errno(status);
2087 goto out;
2088 }
2089
2090 init_waitqueue_head(&osb->checkpoint_event);
2091
2092 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2093
2094 osb->slot_num = OCFS2_INVALID_SLOT;
2095
2096 osb->s_xattr_inline_size = le16_to_cpu(
2097 di->id2.i_super.s_xattr_inline_size);
2098
2099 osb->local_alloc_state = OCFS2_LA_UNUSED;
2100 osb->local_alloc_bh = NULL;
2101 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2102
2103 init_waitqueue_head(&osb->osb_mount_event);
2104
2105 ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2106
2107 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2108 if (!osb->vol_label) {
2109 mlog(ML_ERROR, "unable to alloc vol label\n");
2110 status = -ENOMEM;
2111 goto out_recovery_map;
2112 }
2113
2114 osb->slot_recovery_generations =
2115 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2116 GFP_KERNEL);
2117 if (!osb->slot_recovery_generations) {
2118 status = -ENOMEM;
2119 mlog_errno(status);
2120 goto out_vol_label;
2121 }
2122
2123 init_waitqueue_head(&osb->osb_wipe_event);
2124 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2125 sizeof(*osb->osb_orphan_wipes),
2126 GFP_KERNEL);
2127 if (!osb->osb_orphan_wipes) {
2128 status = -ENOMEM;
2129 mlog_errno(status);
2130 goto out_slot_recovery_gen;
2131 }
2132
2133 osb->osb_rf_lock_tree = RB_ROOT;
2134
2135 osb->s_feature_compat =
2136 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2137 osb->s_feature_ro_compat =
2138 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2139 osb->s_feature_incompat =
2140 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2141
2142 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2143 mlog(ML_ERROR, "couldn't mount because of unsupported "
2144 "optional features (%x).\n", i);
2145 status = -EINVAL;
2146 goto out_orphan_wipes;
2147 }
2148 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2149 mlog(ML_ERROR, "couldn't mount RDWR because of "
2150 "unsupported optional features (%x).\n", i);
2151 status = -EINVAL;
2152 goto out_orphan_wipes;
2153 }
2154
2155 if (ocfs2_clusterinfo_valid(osb)) {
2156 /*
2157 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null
2158 * terminated, so make sure no overflow happens here by using
2159 * memcpy. Destination strings will always be null terminated
2160 * because osb is allocated using kzalloc.
2161 */
2162 osb->osb_stackflags =
2163 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2164 memcpy(osb->osb_cluster_stack,
2165 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2166 OCFS2_STACK_LABEL_LEN);
2167 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2168 mlog(ML_ERROR,
2169 "couldn't mount because of an invalid "
2170 "cluster stack label (%s) \n",
2171 osb->osb_cluster_stack);
2172 status = -EINVAL;
2173 goto out_orphan_wipes;
2174 }
2175 memcpy(osb->osb_cluster_name,
2176 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2177 OCFS2_CLUSTER_NAME_LEN);
2178 } else {
2179 /* The empty string is identical with classic tools that
2180 * don't know about s_cluster_info. */
2181 osb->osb_cluster_stack[0] = '\0';
2182 }
2183
2184 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2185
2186 /*
2187 * FIXME
2188 * This should be done in ocfs2_journal_init(), but any inode
2189 * writes back operation will cause the filesystem to crash.
2190 */
2191 status = ocfs2_journal_alloc(osb);
2192 if (status < 0)
2193 goto out_orphan_wipes;
2194
2195 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2196 init_llist_head(&osb->dquot_drop_list);
2197
2198 /* get some pseudo constants for clustersize bits */
2199 osb->s_clustersize_bits =
2200 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2201 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2202
2203 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2204 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2205 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2206 osb->s_clustersize);
2207 status = -EINVAL;
2208 goto out_journal;
2209 }
2210
2211 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2212 le32_to_cpu(di->i_clusters));
2213
2214 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2215 total_blocks);
2216 if (status) {
2217 mlog(ML_ERROR, "Volume too large "
2218 "to mount safely on this system");
2219 status = -EFBIG;
2220 goto out_journal;
2221 }
2222
2223 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2224 sizeof(di->id2.i_super.s_uuid))) {
2225 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2226 status = -ENOMEM;
2227 goto out_journal;
2228 }
2229
2230 strscpy(osb->vol_label, di->id2.i_super.s_label,
2231 OCFS2_MAX_VOL_LABEL_LEN);
2232 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2233 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2234 osb->first_cluster_group_blkno =
2235 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2236 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2237 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2238 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2239 (unsigned long long)osb->root_blkno,
2240 (unsigned long long)osb->system_dir_blkno,
2241 osb->s_clustersize_bits);
2242
2243 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2244 if (!osb->osb_dlm_debug) {
2245 status = -ENOMEM;
2246 mlog_errno(status);
2247 goto out_uuid_str;
2248 }
2249
2250 atomic_set(&osb->vol_state, VOLUME_INIT);
2251
2252 /* load root, system_dir, and all global system inodes */
2253 status = ocfs2_init_global_system_inodes(osb);
2254 if (status < 0) {
2255 mlog_errno(status);
2256 goto out_dlm_out;
2257 }
2258
2259 /*
2260 * global bitmap
2261 */
2262 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2263 OCFS2_INVALID_SLOT);
2264 if (!inode) {
2265 status = -EINVAL;
2266 mlog_errno(status);
2267 goto out_system_inodes;
2268 }
2269
2270 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2271 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2272 iput(inode);
2273
2274 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2275 osb->s_feature_incompat) * 8;
2276
2277 status = ocfs2_init_slot_info(osb);
2278 if (status < 0) {
2279 mlog_errno(status);
2280 goto out_system_inodes;
2281 }
2282 cleancache_init_shared_fs(sb);
2283
2284 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2285 if (!osb->ocfs2_wq) {
2286 status = -ENOMEM;
2287 mlog_errno(status);
2288 goto out_slot_info;
2289 }
2290
2291 return status;
2292
2293 out_slot_info:
2294 ocfs2_free_slot_info(osb);
2295 out_system_inodes:
2296 ocfs2_release_system_inodes(osb);
2297 out_dlm_out:
2298 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2299 out_uuid_str:
2300 kfree(osb->uuid_str);
2301 out_journal:
2302 kfree(osb->journal);
2303 out_orphan_wipes:
2304 kfree(osb->osb_orphan_wipes);
2305 out_slot_recovery_gen:
2306 kfree(osb->slot_recovery_generations);
2307 out_vol_label:
2308 kfree(osb->vol_label);
2309 out_recovery_map:
2310 kfree(osb->recovery_map);
2311 out:
2312 kfree(osb);
2313 sb->s_fs_info = NULL;
2314 return status;
2315 }
2316
2317 /*
2318 * will return: -EAGAIN if it is ok to keep searching for superblocks
2319 * -EINVAL if there is a bad superblock
2320 * 0 on success
2321 */
ocfs2_verify_volume(struct ocfs2_dinode * di,struct buffer_head * bh,u32 blksz,struct ocfs2_blockcheck_stats * stats)2322 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2323 struct buffer_head *bh,
2324 u32 blksz,
2325 struct ocfs2_blockcheck_stats *stats)
2326 {
2327 int status = -EAGAIN;
2328
2329 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2330 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2331 /* We have to do a raw check of the feature here */
2332 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2333 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2334 status = ocfs2_block_check_validate(bh->b_data,
2335 bh->b_size,
2336 &di->i_check,
2337 stats);
2338 if (status)
2339 goto out;
2340 }
2341 status = -EINVAL;
2342 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2343 mlog(ML_ERROR, "found superblock with incorrect block "
2344 "size: found %u, should be %u\n",
2345 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2346 blksz);
2347 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2348 OCFS2_MAJOR_REV_LEVEL ||
2349 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2350 OCFS2_MINOR_REV_LEVEL) {
2351 mlog(ML_ERROR, "found superblock with bad version: "
2352 "found %u.%u, should be %u.%u\n",
2353 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2354 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2355 OCFS2_MAJOR_REV_LEVEL,
2356 OCFS2_MINOR_REV_LEVEL);
2357 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2358 mlog(ML_ERROR, "bad block number on superblock: "
2359 "found %llu, should be %llu\n",
2360 (unsigned long long)le64_to_cpu(di->i_blkno),
2361 (unsigned long long)bh->b_blocknr);
2362 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2363 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2364 mlog(ML_ERROR, "bad cluster size found: %u\n",
2365 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2366 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2367 mlog(ML_ERROR, "bad root_blkno: 0\n");
2368 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2369 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2370 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2371 mlog(ML_ERROR,
2372 "Superblock slots found greater than file system "
2373 "maximum: found %u, max %u\n",
2374 le16_to_cpu(di->id2.i_super.s_max_slots),
2375 OCFS2_MAX_SLOTS);
2376 } else {
2377 /* found it! */
2378 status = 0;
2379 }
2380 }
2381
2382 out:
2383 if (status && status != -EAGAIN)
2384 mlog_errno(status);
2385 return status;
2386 }
2387
ocfs2_check_volume(struct ocfs2_super * osb)2388 static int ocfs2_check_volume(struct ocfs2_super *osb)
2389 {
2390 int status;
2391 int dirty;
2392 int local;
2393 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2394 * recover
2395 * ourselves. */
2396
2397 /* Init our journal object. */
2398 status = ocfs2_journal_init(osb, &dirty);
2399 if (status < 0) {
2400 mlog(ML_ERROR, "Could not initialize journal!\n");
2401 goto finally;
2402 }
2403
2404 /* Now that journal has been initialized, check to make sure
2405 entire volume is addressable. */
2406 status = ocfs2_journal_addressable(osb);
2407 if (status)
2408 goto finally;
2409
2410 /* If the journal was unmounted cleanly then we don't want to
2411 * recover anything. Otherwise, journal_load will do that
2412 * dirty work for us :) */
2413 if (!dirty) {
2414 status = ocfs2_journal_wipe(osb->journal, 0);
2415 if (status < 0) {
2416 mlog_errno(status);
2417 goto finally;
2418 }
2419 } else {
2420 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2421 "unmounted cleanly, recovering it.\n", osb->dev_str);
2422 }
2423
2424 local = ocfs2_mount_local(osb);
2425
2426 /* will play back anything left in the journal. */
2427 status = ocfs2_journal_load(osb->journal, local, dirty);
2428 if (status < 0) {
2429 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2430 goto finally;
2431 }
2432
2433 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2434 jbd2_journal_set_features(osb->journal->j_journal,
2435 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2436 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2437 else
2438 jbd2_journal_clear_features(osb->journal->j_journal,
2439 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2440 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2441
2442 if (dirty) {
2443 /* recover my local alloc if we didn't unmount cleanly. */
2444 status = ocfs2_begin_local_alloc_recovery(osb,
2445 osb->slot_num,
2446 &local_alloc);
2447 if (status < 0) {
2448 mlog_errno(status);
2449 goto finally;
2450 }
2451 /* we complete the recovery process after we've marked
2452 * ourselves as mounted. */
2453 }
2454
2455 status = ocfs2_load_local_alloc(osb);
2456 if (status < 0) {
2457 mlog_errno(status);
2458 goto finally;
2459 }
2460
2461 if (dirty) {
2462 /* Recovery will be completed after we've mounted the
2463 * rest of the volume. */
2464 osb->local_alloc_copy = local_alloc;
2465 local_alloc = NULL;
2466 }
2467
2468 /* go through each journal, trylock it and if you get the
2469 * lock, and it's marked as dirty, set the bit in the recover
2470 * map and launch a recovery thread for it. */
2471 status = ocfs2_mark_dead_nodes(osb);
2472 if (status < 0) {
2473 mlog_errno(status);
2474 goto finally;
2475 }
2476
2477 status = ocfs2_compute_replay_slots(osb);
2478 if (status < 0)
2479 mlog_errno(status);
2480
2481 finally:
2482 kfree(local_alloc);
2483
2484 if (status)
2485 mlog_errno(status);
2486 return status;
2487 }
2488
2489 /*
2490 * The routine gets called from dismount or close whenever a dismount on
2491 * volume is requested and the osb open count becomes 1.
2492 * It will remove the osb from the global list and also free up all the
2493 * initialized resources and fileobject.
2494 */
ocfs2_delete_osb(struct ocfs2_super * osb)2495 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2496 {
2497 /* This function assumes that the caller has the main osb resource */
2498
2499 /* ocfs2_initializer_super have already created this workqueue */
2500 if (osb->ocfs2_wq)
2501 destroy_workqueue(osb->ocfs2_wq);
2502
2503 ocfs2_free_slot_info(osb);
2504
2505 kfree(osb->osb_orphan_wipes);
2506 kfree(osb->slot_recovery_generations);
2507 /* FIXME
2508 * This belongs in journal shutdown, but because we have to
2509 * allocate osb->journal at the middle of ocfs2_initialize_super(),
2510 * we free it here.
2511 */
2512 kfree(osb->journal);
2513 kfree(osb->local_alloc_copy);
2514 kfree(osb->uuid_str);
2515 kfree(osb->vol_label);
2516 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2517 memset(osb, 0, sizeof(struct ocfs2_super));
2518 }
2519
2520 /* Depending on the mount option passed, perform one of the following:
2521 * Put OCFS2 into a readonly state (default)
2522 * Return EIO so that only the process errs
2523 * Fix the error as if fsck.ocfs2 -y
2524 * panic
2525 */
ocfs2_handle_error(struct super_block * sb)2526 static int ocfs2_handle_error(struct super_block *sb)
2527 {
2528 struct ocfs2_super *osb = OCFS2_SB(sb);
2529 int rv = 0;
2530
2531 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2532 pr_crit("On-disk corruption discovered. "
2533 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2534
2535 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2536 panic("OCFS2: (device %s): panic forced after error\n",
2537 sb->s_id);
2538 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2539 pr_crit("OCFS2: Returning error to the calling process.\n");
2540 rv = -EIO;
2541 } else { /* default option */
2542 rv = -EROFS;
2543 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2544 return rv;
2545
2546 pr_crit("OCFS2: File system is now read-only.\n");
2547 sb->s_flags |= SB_RDONLY;
2548 ocfs2_set_ro_flag(osb, 0);
2549 }
2550
2551 return rv;
2552 }
2553
__ocfs2_error(struct super_block * sb,const char * function,const char * fmt,...)2554 int __ocfs2_error(struct super_block *sb, const char *function,
2555 const char *fmt, ...)
2556 {
2557 struct va_format vaf;
2558 va_list args;
2559
2560 va_start(args, fmt);
2561 vaf.fmt = fmt;
2562 vaf.va = &args;
2563
2564 /* Not using mlog here because we want to show the actual
2565 * function the error came from. */
2566 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2567 sb->s_id, function, &vaf);
2568
2569 va_end(args);
2570
2571 return ocfs2_handle_error(sb);
2572 }
2573
2574 /* Handle critical errors. This is intentionally more drastic than
2575 * ocfs2_handle_error, so we only use for things like journal errors,
2576 * etc. */
__ocfs2_abort(struct super_block * sb,const char * function,const char * fmt,...)2577 void __ocfs2_abort(struct super_block *sb, const char *function,
2578 const char *fmt, ...)
2579 {
2580 struct va_format vaf;
2581 va_list args;
2582
2583 va_start(args, fmt);
2584
2585 vaf.fmt = fmt;
2586 vaf.va = &args;
2587
2588 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2589 sb->s_id, function, &vaf);
2590
2591 va_end(args);
2592
2593 /* We don't have the cluster support yet to go straight to
2594 * hard readonly in here. Until then, we want to keep
2595 * ocfs2_abort() so that we can at least mark critical
2596 * errors.
2597 *
2598 * TODO: This should abort the journal and alert other nodes
2599 * that our slot needs recovery. */
2600
2601 /* Force a panic(). This stinks, but it's better than letting
2602 * things continue without having a proper hard readonly
2603 * here. */
2604 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2605 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2606 ocfs2_handle_error(sb);
2607 }
2608
2609 /*
2610 * Void signal blockers, because in-kernel sigprocmask() only fails
2611 * when SIG_* is wrong.
2612 */
ocfs2_block_signals(sigset_t * oldset)2613 void ocfs2_block_signals(sigset_t *oldset)
2614 {
2615 int rc;
2616 sigset_t blocked;
2617
2618 sigfillset(&blocked);
2619 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2620 BUG_ON(rc);
2621 }
2622
ocfs2_unblock_signals(sigset_t * oldset)2623 void ocfs2_unblock_signals(sigset_t *oldset)
2624 {
2625 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2626 BUG_ON(rc);
2627 }
2628
2629 module_init(ocfs2_init);
2630 module_exit(ocfs2_exit);
2631