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/fs_parser.h>
23 #include <linux/fs_context.h>
24 #include <linux/crc32.h>
25 #include <linux/debugfs.h>
26 #include <linux/seq_file.h>
27 #include <linux/quotaops.h>
28 #include <linux/signal.h>
29
30 #define CREATE_TRACE_POINTS
31 #include "ocfs2_trace.h"
32
33 #include <cluster/masklog.h>
34
35 #include "ocfs2.h"
36
37 /* this should be the only file to include a version 1 header */
38 #include "ocfs1_fs_compat.h"
39
40 #include "alloc.h"
41 #include "aops.h"
42 #include "blockcheck.h"
43 #include "dlmglue.h"
44 #include "export.h"
45 #include "extent_map.h"
46 #include "heartbeat.h"
47 #include "inode.h"
48 #include "journal.h"
49 #include "localalloc.h"
50 #include "namei.h"
51 #include "slot_map.h"
52 #include "super.h"
53 #include "sysfile.h"
54 #include "uptodate.h"
55 #include "xattr.h"
56 #include "quota.h"
57 #include "refcounttree.h"
58 #include "suballoc.h"
59
60 #include "buffer_head_io.h"
61 #include "filecheck.h"
62
63 static struct kmem_cache *ocfs2_inode_cachep;
64 struct kmem_cache *ocfs2_dquot_cachep;
65 struct kmem_cache *ocfs2_qf_chunk_cachep;
66
67 static struct dentry *ocfs2_debugfs_root;
68
69 MODULE_AUTHOR("Oracle");
70 MODULE_LICENSE("GPL");
71 MODULE_DESCRIPTION("OCFS2 cluster file system");
72
73 struct mount_options
74 {
75 unsigned long commit_interval;
76 unsigned long mount_opt;
77 unsigned int atime_quantum;
78 unsigned short slot;
79 int localalloc_opt;
80 unsigned int resv_level;
81 int dir_resv_level;
82 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
83 bool user_stack;
84 };
85
86 static int ocfs2_parse_param(struct fs_context *fc, struct fs_parameter *param);
87 static int ocfs2_check_set_options(struct super_block *sb,
88 struct mount_options *options);
89 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
90 static void ocfs2_put_super(struct super_block *sb);
91 static int ocfs2_mount_volume(struct super_block *sb);
92 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
93 static int ocfs2_initialize_mem_caches(void);
94 static void ocfs2_free_mem_caches(void);
95 static void ocfs2_delete_osb(struct ocfs2_super *osb);
96
97 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
98
99 static int ocfs2_sync_fs(struct super_block *sb, int wait);
100
101 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
102 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
103 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
104 static int ocfs2_check_volume(struct ocfs2_super *osb);
105 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
106 struct buffer_head *bh,
107 u32 sectsize,
108 struct ocfs2_blockcheck_stats *stats);
109 static int ocfs2_initialize_super(struct super_block *sb,
110 struct buffer_head *bh,
111 int sector_size,
112 struct ocfs2_blockcheck_stats *stats);
113 static int ocfs2_get_sector(struct super_block *sb,
114 struct buffer_head **bh,
115 int block,
116 int sect_size);
117 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
118 static void ocfs2_free_inode(struct inode *inode);
119 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
120 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
121 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
122
ocfs2_get_dquots(struct inode * inode)123 static struct dquot __rcu **ocfs2_get_dquots(struct inode *inode)
124 {
125 return OCFS2_I(inode)->i_dquot;
126 }
127
128 static const struct super_operations ocfs2_sops = {
129 .statfs = ocfs2_statfs,
130 .alloc_inode = ocfs2_alloc_inode,
131 .free_inode = ocfs2_free_inode,
132 .drop_inode = ocfs2_drop_inode,
133 .evict_inode = ocfs2_evict_inode,
134 .sync_fs = ocfs2_sync_fs,
135 .put_super = ocfs2_put_super,
136 .show_options = ocfs2_show_options,
137 .quota_read = ocfs2_quota_read,
138 .quota_write = ocfs2_quota_write,
139 .get_dquots = ocfs2_get_dquots,
140 };
141
142 enum {
143 Opt_barrier,
144 Opt_errors,
145 Opt_intr,
146 Opt_heartbeat,
147 Opt_data,
148 Opt_atime_quantum,
149 Opt_slot,
150 Opt_commit,
151 Opt_localalloc,
152 Opt_localflocks,
153 Opt_stack,
154 Opt_user_xattr,
155 Opt_inode64,
156 Opt_acl,
157 Opt_usrquota,
158 Opt_grpquota,
159 Opt_coherency,
160 Opt_resv_level,
161 Opt_dir_resv_level,
162 Opt_journal_async_commit,
163 };
164
165 static const struct constant_table ocfs2_param_errors[] = {
166 {"panic", OCFS2_MOUNT_ERRORS_PANIC},
167 {"remount-ro", OCFS2_MOUNT_ERRORS_ROFS},
168 {"continue", OCFS2_MOUNT_ERRORS_CONT},
169 {}
170 };
171
172 static const struct constant_table ocfs2_param_heartbeat[] = {
173 {"local", OCFS2_MOUNT_HB_LOCAL},
174 {"none", OCFS2_MOUNT_HB_NONE},
175 {"global", OCFS2_MOUNT_HB_GLOBAL},
176 {}
177 };
178
179 static const struct constant_table ocfs2_param_data[] = {
180 {"writeback", OCFS2_MOUNT_DATA_WRITEBACK},
181 {"ordered", 0},
182 {}
183 };
184
185 static const struct constant_table ocfs2_param_coherency[] = {
186 {"buffered", OCFS2_MOUNT_COHERENCY_BUFFERED},
187 {"full", 0},
188 {}
189 };
190
191 static const struct fs_parameter_spec ocfs2_param_spec[] = {
192 fsparam_u32 ("barrier", Opt_barrier),
193 fsparam_enum ("errors", Opt_errors, ocfs2_param_errors),
194 fsparam_flag_no ("intr", Opt_intr),
195 fsparam_enum ("heartbeat", Opt_heartbeat, ocfs2_param_heartbeat),
196 fsparam_enum ("data", Opt_data, ocfs2_param_data),
197 fsparam_u32 ("atime_quantum", Opt_atime_quantum),
198 fsparam_u32 ("preferred_slot", Opt_slot),
199 fsparam_u32 ("commit", Opt_commit),
200 fsparam_s32 ("localalloc", Opt_localalloc),
201 fsparam_flag ("localflocks", Opt_localflocks),
202 fsparam_string ("cluster_stack", Opt_stack),
203 fsparam_flag_no ("user_xattr", Opt_user_xattr),
204 fsparam_flag ("inode64", Opt_inode64),
205 fsparam_flag_no ("acl", Opt_acl),
206 fsparam_flag ("usrquota", Opt_usrquota),
207 fsparam_flag ("grpquota", Opt_grpquota),
208 fsparam_enum ("coherency", Opt_coherency, ocfs2_param_coherency),
209 fsparam_u32 ("resv_level", Opt_resv_level),
210 fsparam_u32 ("dir_resv_level", Opt_dir_resv_level),
211 fsparam_flag ("journal_async_commit", Opt_journal_async_commit),
212 {}
213 };
214
215 #ifdef CONFIG_DEBUG_FS
ocfs2_osb_dump(struct ocfs2_super * osb,char * buf,int len)216 static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
217 {
218 struct ocfs2_cluster_connection *cconn = osb->cconn;
219 struct ocfs2_recovery_map *rm = osb->recovery_map;
220 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
221 int i, out = 0;
222 unsigned long flags;
223
224 out += scnprintf(buf + out, len - out,
225 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
226 "Device", osb->dev_str, osb->uuid_str,
227 osb->fs_generation, osb->vol_label);
228
229 out += scnprintf(buf + out, len - out,
230 "%10s => State: %d Flags: 0x%lX\n", "Volume",
231 atomic_read(&osb->vol_state), osb->osb_flags);
232
233 out += scnprintf(buf + out, len - out,
234 "%10s => Block: %lu Cluster: %d\n", "Sizes",
235 osb->sb->s_blocksize, osb->s_clustersize);
236
237 out += scnprintf(buf + out, len - out,
238 "%10s => Compat: 0x%X Incompat: 0x%X "
239 "ROcompat: 0x%X\n",
240 "Features", osb->s_feature_compat,
241 osb->s_feature_incompat, osb->s_feature_ro_compat);
242
243 out += scnprintf(buf + out, len - out,
244 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
245 osb->s_mount_opt, osb->s_atime_quantum);
246
247 if (cconn) {
248 out += scnprintf(buf + out, len - out,
249 "%10s => Stack: %s Name: %*s "
250 "Version: %d.%d\n", "Cluster",
251 (*osb->osb_cluster_stack == '\0' ?
252 "o2cb" : osb->osb_cluster_stack),
253 cconn->cc_namelen, cconn->cc_name,
254 cconn->cc_version.pv_major,
255 cconn->cc_version.pv_minor);
256 }
257
258 spin_lock_irqsave(&osb->dc_task_lock, flags);
259 out += scnprintf(buf + out, len - out,
260 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
261 "WorkSeq: %lu\n", "DownCnvt",
262 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
263 osb->blocked_lock_count, osb->dc_wake_sequence,
264 osb->dc_work_sequence);
265 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
266
267 spin_lock(&osb->osb_lock);
268 out += scnprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
269 "Recovery",
270 (osb->recovery_thread_task ?
271 task_pid_nr(osb->recovery_thread_task) : -1));
272 if (rm->rm_used == 0)
273 out += scnprintf(buf + out, len - out, " None\n");
274 else {
275 for (i = 0; i < rm->rm_used; i++)
276 out += scnprintf(buf + out, len - out, " %d",
277 rm->rm_entries[i]);
278 out += scnprintf(buf + out, len - out, "\n");
279 }
280 spin_unlock(&osb->osb_lock);
281
282 out += scnprintf(buf + out, len - out,
283 "%10s => Pid: %d Interval: %lu\n", "Commit",
284 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
285 osb->osb_commit_interval);
286
287 out += scnprintf(buf + out, len - out,
288 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
289 "Journal", osb->journal->j_state,
290 osb->journal->j_trans_id,
291 atomic_read(&osb->journal->j_num_trans));
292
293 out += scnprintf(buf + out, len - out,
294 "%10s => GlobalAllocs: %d LocalAllocs: %d "
295 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
296 "Stats",
297 atomic_read(&osb->alloc_stats.bitmap_data),
298 atomic_read(&osb->alloc_stats.local_data),
299 atomic_read(&osb->alloc_stats.bg_allocs),
300 atomic_read(&osb->alloc_stats.moves),
301 atomic_read(&osb->alloc_stats.bg_extends));
302
303 out += scnprintf(buf + out, len - out,
304 "%10s => State: %u Descriptor: %llu Size: %u bits "
305 "Default: %u bits\n",
306 "LocalAlloc", osb->local_alloc_state,
307 (unsigned long long)osb->la_last_gd,
308 osb->local_alloc_bits, osb->local_alloc_default_bits);
309
310 spin_lock(&osb->osb_lock);
311 out += scnprintf(buf + out, len - out,
312 "%10s => InodeSlot: %d StolenInodes: %d, "
313 "MetaSlot: %d StolenMeta: %d\n", "Steal",
314 osb->s_inode_steal_slot,
315 atomic_read(&osb->s_num_inodes_stolen),
316 osb->s_meta_steal_slot,
317 atomic_read(&osb->s_num_meta_stolen));
318 spin_unlock(&osb->osb_lock);
319
320 out += scnprintf(buf + out, len - out, "OrphanScan => ");
321 out += scnprintf(buf + out, len - out, "Local: %u Global: %u ",
322 os->os_count, os->os_seqno);
323 out += scnprintf(buf + out, len - out, " Last Scan: ");
324 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
325 out += scnprintf(buf + out, len - out, "Disabled\n");
326 else
327 out += scnprintf(buf + out, len - out, "%lu seconds ago\n",
328 (unsigned long)(ktime_get_seconds() - os->os_scantime));
329
330 out += scnprintf(buf + out, len - out, "%10s => %3s %10s\n",
331 "Slots", "Num", "RecoGen");
332 for (i = 0; i < osb->max_slots; ++i) {
333 out += scnprintf(buf + out, len - out,
334 "%10s %c %3d %10d\n",
335 " ",
336 (i == osb->slot_num ? '*' : ' '),
337 i, osb->slot_recovery_generations[i]);
338 }
339
340 return out;
341 }
342
ocfs2_osb_debug_open(struct inode * inode,struct file * file)343 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
344 {
345 struct ocfs2_super *osb = inode->i_private;
346 char *buf = NULL;
347
348 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
349 if (!buf)
350 goto bail;
351
352 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
353
354 file->private_data = buf;
355
356 return 0;
357 bail:
358 return -ENOMEM;
359 }
360
ocfs2_debug_release(struct inode * inode,struct file * file)361 static int ocfs2_debug_release(struct inode *inode, struct file *file)
362 {
363 kfree(file->private_data);
364 return 0;
365 }
366
ocfs2_debug_read(struct file * file,char __user * buf,size_t nbytes,loff_t * ppos)367 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
368 size_t nbytes, loff_t *ppos)
369 {
370 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
371 i_size_read(file->f_mapping->host));
372 }
373 #else
ocfs2_osb_debug_open(struct inode * inode,struct file * file)374 static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
375 {
376 return 0;
377 }
ocfs2_debug_release(struct inode * inode,struct file * file)378 static int ocfs2_debug_release(struct inode *inode, struct file *file)
379 {
380 return 0;
381 }
ocfs2_debug_read(struct file * file,char __user * buf,size_t nbytes,loff_t * ppos)382 static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
383 size_t nbytes, loff_t *ppos)
384 {
385 return 0;
386 }
387 #endif /* CONFIG_DEBUG_FS */
388
389 static const struct file_operations ocfs2_osb_debug_fops = {
390 .open = ocfs2_osb_debug_open,
391 .release = ocfs2_debug_release,
392 .read = ocfs2_debug_read,
393 .llseek = generic_file_llseek,
394 };
395
ocfs2_sync_fs(struct super_block * sb,int wait)396 static int ocfs2_sync_fs(struct super_block *sb, int wait)
397 {
398 int status;
399 tid_t target;
400 struct ocfs2_super *osb = OCFS2_SB(sb);
401
402 if (ocfs2_is_hard_readonly(osb))
403 return -EROFS;
404
405 if (wait) {
406 status = ocfs2_flush_truncate_log(osb);
407 if (status < 0)
408 mlog_errno(status);
409 } else {
410 ocfs2_schedule_truncate_log_flush(osb, 0);
411 }
412
413 if (jbd2_journal_start_commit(osb->journal->j_journal,
414 &target)) {
415 if (wait)
416 jbd2_log_wait_commit(osb->journal->j_journal,
417 target);
418 }
419 return 0;
420 }
421
ocfs2_need_system_inode(struct ocfs2_super * osb,int ino)422 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
423 {
424 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
425 && (ino == USER_QUOTA_SYSTEM_INODE
426 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
427 return 0;
428 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
429 && (ino == GROUP_QUOTA_SYSTEM_INODE
430 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
431 return 0;
432 return 1;
433 }
434
ocfs2_init_global_system_inodes(struct ocfs2_super * osb)435 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
436 {
437 struct inode *new = NULL;
438 int status = 0;
439 int i;
440
441 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
442 if (IS_ERR(new)) {
443 status = PTR_ERR(new);
444 mlog_errno(status);
445 goto bail;
446 }
447 osb->root_inode = new;
448
449 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
450 if (IS_ERR(new)) {
451 status = PTR_ERR(new);
452 mlog_errno(status);
453 goto bail;
454 }
455 osb->sys_root_inode = new;
456
457 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
458 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
459 if (!ocfs2_need_system_inode(osb, i))
460 continue;
461 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
462 if (!new) {
463 ocfs2_release_system_inodes(osb);
464 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
465 mlog_errno(status);
466 mlog(ML_ERROR, "Unable to load system inode %d, "
467 "possibly corrupt fs?", i);
468 goto bail;
469 }
470 // the array now has one ref, so drop this one
471 iput(new);
472 }
473
474 bail:
475 if (status)
476 mlog_errno(status);
477 return status;
478 }
479
ocfs2_init_local_system_inodes(struct ocfs2_super * osb)480 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
481 {
482 struct inode *new = NULL;
483 int status = 0;
484 int i;
485
486 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
487 i < NUM_SYSTEM_INODES;
488 i++) {
489 if (!ocfs2_need_system_inode(osb, i))
490 continue;
491 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
492 if (!new) {
493 ocfs2_release_system_inodes(osb);
494 status = ocfs2_is_soft_readonly(osb) ? -EROFS : -EINVAL;
495 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
496 status, i, osb->slot_num);
497 goto bail;
498 }
499 /* the array now has one ref, so drop this one */
500 iput(new);
501 }
502
503 bail:
504 if (status)
505 mlog_errno(status);
506 return status;
507 }
508
ocfs2_release_system_inodes(struct ocfs2_super * osb)509 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
510 {
511 int i;
512 struct inode *inode;
513
514 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
515 inode = osb->global_system_inodes[i];
516 if (inode) {
517 iput(inode);
518 osb->global_system_inodes[i] = NULL;
519 }
520 }
521
522 inode = osb->sys_root_inode;
523 if (inode) {
524 iput(inode);
525 osb->sys_root_inode = NULL;
526 }
527
528 inode = osb->root_inode;
529 if (inode) {
530 iput(inode);
531 osb->root_inode = NULL;
532 }
533
534 if (!osb->local_system_inodes)
535 return;
536
537 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
538 if (osb->local_system_inodes[i]) {
539 iput(osb->local_system_inodes[i]);
540 osb->local_system_inodes[i] = NULL;
541 }
542 }
543
544 kfree(osb->local_system_inodes);
545 osb->local_system_inodes = NULL;
546 }
547
548 /* We're allocating fs objects, use GFP_NOFS */
ocfs2_alloc_inode(struct super_block * sb)549 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
550 {
551 struct ocfs2_inode_info *oi;
552
553 oi = alloc_inode_sb(sb, ocfs2_inode_cachep, GFP_NOFS);
554 if (!oi)
555 return NULL;
556
557 oi->i_sync_tid = 0;
558 oi->i_datasync_tid = 0;
559 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
560
561 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
562 return &oi->vfs_inode;
563 }
564
ocfs2_free_inode(struct inode * inode)565 static void ocfs2_free_inode(struct inode *inode)
566 {
567 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
568 }
569
ocfs2_max_file_offset(unsigned int bbits,unsigned int cbits)570 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
571 unsigned int cbits)
572 {
573 unsigned int bytes = 1 << cbits;
574 unsigned int trim = bytes;
575 unsigned int bitshift = 32;
576
577 /*
578 * i_size and all block offsets in ocfs2 are always 64 bits
579 * wide. i_clusters is 32 bits, in cluster-sized units. So on
580 * 64 bit platforms, cluster size will be the limiting factor.
581 */
582
583 #if BITS_PER_LONG == 32
584 BUILD_BUG_ON(sizeof(sector_t) != 8);
585 /*
586 * We might be limited by page cache size.
587 */
588 if (bytes > PAGE_SIZE) {
589 bytes = PAGE_SIZE;
590 trim = 1;
591 /*
592 * Shift by 31 here so that we don't get larger than
593 * MAX_LFS_FILESIZE
594 */
595 bitshift = 31;
596 }
597 #endif
598
599 /*
600 * Trim by a whole cluster when we can actually approach the
601 * on-disk limits. Otherwise we can overflow i_clusters when
602 * an extent start is at the max offset.
603 */
604 return (((unsigned long long)bytes) << bitshift) - trim;
605 }
606
ocfs2_reconfigure(struct fs_context * fc)607 static int ocfs2_reconfigure(struct fs_context *fc)
608 {
609 int incompat_features;
610 int ret = 0;
611 struct mount_options *parsed_options = fc->fs_private;
612 struct super_block *sb = fc->root->d_sb;
613 struct ocfs2_super *osb = OCFS2_SB(sb);
614 u32 tmp;
615
616 sync_filesystem(sb);
617
618 if (!ocfs2_check_set_options(sb, parsed_options)) {
619 ret = -EINVAL;
620 goto out;
621 }
622
623 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
624 OCFS2_MOUNT_HB_NONE;
625 if ((osb->s_mount_opt & tmp) != (parsed_options->mount_opt & tmp)) {
626 ret = -EINVAL;
627 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
628 goto out;
629 }
630
631 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
632 (parsed_options->mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
633 ret = -EINVAL;
634 mlog(ML_ERROR, "Cannot change data mode on remount\n");
635 goto out;
636 }
637
638 /* Probably don't want this on remount; it might
639 * mess with other nodes */
640 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
641 (parsed_options->mount_opt & OCFS2_MOUNT_INODE64)) {
642 ret = -EINVAL;
643 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
644 goto out;
645 }
646
647 /* We're going to/from readonly mode. */
648 if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {
649 /* Disable quota accounting before remounting RO */
650 if (fc->sb_flags & SB_RDONLY) {
651 ret = ocfs2_susp_quotas(osb, 0);
652 if (ret < 0)
653 goto out;
654 }
655 /* Lock here so the check of HARD_RO and the potential
656 * setting of SOFT_RO is atomic. */
657 spin_lock(&osb->osb_lock);
658 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
659 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
660 ret = -EROFS;
661 goto unlock_osb;
662 }
663
664 if (fc->sb_flags & SB_RDONLY) {
665 sb->s_flags |= SB_RDONLY;
666 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
667 } else {
668 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
669 mlog(ML_ERROR, "Cannot remount RDWR "
670 "filesystem due to previous errors.\n");
671 ret = -EROFS;
672 goto unlock_osb;
673 }
674 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
675 if (incompat_features) {
676 mlog(ML_ERROR, "Cannot remount RDWR because "
677 "of unsupported optional features "
678 "(%x).\n", incompat_features);
679 ret = -EINVAL;
680 goto unlock_osb;
681 }
682 sb->s_flags &= ~SB_RDONLY;
683 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
684 }
685 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, fc->sb_flags);
686 unlock_osb:
687 spin_unlock(&osb->osb_lock);
688 /* Enable quota accounting after remounting RW */
689 if (!ret && !(fc->sb_flags & SB_RDONLY)) {
690 if (sb_any_quota_suspended(sb))
691 ret = ocfs2_susp_quotas(osb, 1);
692 else
693 ret = ocfs2_enable_quotas(osb);
694 if (ret < 0) {
695 /* Return back changes... */
696 spin_lock(&osb->osb_lock);
697 sb->s_flags |= SB_RDONLY;
698 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
699 spin_unlock(&osb->osb_lock);
700 goto out;
701 }
702 }
703 }
704
705 if (!ret) {
706 /* Only save off the new mount options in case of a successful
707 * remount. */
708 osb->s_mount_opt = parsed_options->mount_opt;
709 osb->s_atime_quantum = parsed_options->atime_quantum;
710 osb->preferred_slot = parsed_options->slot;
711 if (parsed_options->commit_interval)
712 osb->osb_commit_interval = parsed_options->commit_interval;
713
714 if (!ocfs2_is_hard_readonly(osb))
715 ocfs2_set_journal_params(osb);
716
717 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
718 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
719 SB_POSIXACL : 0);
720 }
721 out:
722 return ret;
723 }
724
ocfs2_sb_probe(struct super_block * sb,struct buffer_head ** bh,int * sector_size,struct ocfs2_blockcheck_stats * stats)725 static int ocfs2_sb_probe(struct super_block *sb,
726 struct buffer_head **bh,
727 int *sector_size,
728 struct ocfs2_blockcheck_stats *stats)
729 {
730 int status, tmpstat;
731 struct ocfs1_vol_disk_hdr *hdr;
732 struct ocfs2_dinode *di;
733 int blksize;
734
735 *bh = NULL;
736
737 /* may be > 512 */
738 *sector_size = bdev_logical_block_size(sb->s_bdev);
739 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
740 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
741 *sector_size, OCFS2_MAX_BLOCKSIZE);
742 status = -EINVAL;
743 goto bail;
744 }
745
746 /* Can this really happen? */
747 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
748 *sector_size = OCFS2_MIN_BLOCKSIZE;
749
750 /* check block zero for old format */
751 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
752 if (status < 0) {
753 mlog_errno(status);
754 goto bail;
755 }
756 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
757 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
758 mlog(ML_ERROR, "incompatible version: %u.%u\n",
759 hdr->major_version, hdr->minor_version);
760 status = -EINVAL;
761 }
762 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
763 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
764 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
765 hdr->signature);
766 status = -EINVAL;
767 }
768 brelse(*bh);
769 *bh = NULL;
770 if (status < 0) {
771 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
772 "upgraded before mounting with ocfs v2\n");
773 goto bail;
774 }
775
776 /*
777 * Now check at magic offset for 512, 1024, 2048, 4096
778 * blocksizes. 4096 is the maximum blocksize because it is
779 * the minimum clustersize.
780 */
781 status = -EINVAL;
782 for (blksize = *sector_size;
783 blksize <= OCFS2_MAX_BLOCKSIZE;
784 blksize <<= 1) {
785 tmpstat = ocfs2_get_sector(sb, bh,
786 OCFS2_SUPER_BLOCK_BLKNO,
787 blksize);
788 if (tmpstat < 0) {
789 status = tmpstat;
790 mlog_errno(status);
791 break;
792 }
793 di = (struct ocfs2_dinode *) (*bh)->b_data;
794 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
795 spin_lock_init(&stats->b_lock);
796 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
797 if (tmpstat < 0) {
798 brelse(*bh);
799 *bh = NULL;
800 }
801 if (tmpstat != -EAGAIN) {
802 status = tmpstat;
803 break;
804 }
805 }
806
807 bail:
808 return status;
809 }
810
ocfs2_verify_heartbeat(struct ocfs2_super * osb)811 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
812 {
813 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
814
815 if (osb->s_mount_opt & hb_enabled) {
816 if (ocfs2_mount_local(osb)) {
817 mlog(ML_ERROR, "Cannot heartbeat on a locally "
818 "mounted device.\n");
819 return -EINVAL;
820 }
821 if (ocfs2_userspace_stack(osb)) {
822 mlog(ML_ERROR, "Userspace stack expected, but "
823 "o2cb heartbeat arguments passed to mount\n");
824 return -EINVAL;
825 }
826 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
827 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
828 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
829 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
830 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
831 return -EINVAL;
832 }
833 }
834
835 if (!(osb->s_mount_opt & hb_enabled)) {
836 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
837 !ocfs2_userspace_stack(osb)) {
838 mlog(ML_ERROR, "Heartbeat has to be started to mount "
839 "a read-write clustered device.\n");
840 return -EINVAL;
841 }
842 }
843
844 return 0;
845 }
846
847 /*
848 * If we're using a userspace stack, mount should have passed
849 * a name that matches the disk. If not, mount should not
850 * have passed a stack.
851 */
ocfs2_verify_userspace_stack(struct ocfs2_super * osb,struct mount_options * mopt)852 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
853 struct mount_options *mopt)
854 {
855 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
856 mlog(ML_ERROR,
857 "cluster stack passed to mount, but this filesystem "
858 "does not support it\n");
859 return -EINVAL;
860 }
861
862 if (ocfs2_userspace_stack(osb) &&
863 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
864 OCFS2_STACK_LABEL_LEN)) {
865 mlog(ML_ERROR,
866 "cluster stack passed to mount (\"%s\") does not "
867 "match the filesystem (\"%s\")\n",
868 mopt->cluster_stack,
869 osb->osb_cluster_stack);
870 return -EINVAL;
871 }
872
873 return 0;
874 }
875
ocfs2_susp_quotas(struct ocfs2_super * osb,int unsuspend)876 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
877 {
878 int type;
879 struct super_block *sb = osb->sb;
880 unsigned int feature[OCFS2_MAXQUOTAS] = {
881 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
882 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
883 int status = 0;
884
885 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
886 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
887 continue;
888 if (unsuspend)
889 status = dquot_resume(sb, type);
890 else {
891 struct ocfs2_mem_dqinfo *oinfo;
892
893 /* Cancel periodic syncing before suspending */
894 oinfo = sb_dqinfo(sb, type)->dqi_priv;
895 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
896 status = dquot_suspend(sb, type);
897 }
898 if (status < 0)
899 break;
900 }
901 if (status < 0)
902 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
903 "remount (error = %d).\n", status);
904 return status;
905 }
906
ocfs2_enable_quotas(struct ocfs2_super * osb)907 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
908 {
909 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
910 struct super_block *sb = osb->sb;
911 unsigned int feature[OCFS2_MAXQUOTAS] = {
912 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
913 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
914 unsigned int ino[OCFS2_MAXQUOTAS] = {
915 LOCAL_USER_QUOTA_SYSTEM_INODE,
916 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
917 int status;
918 int type;
919
920 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
921 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
922 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
923 continue;
924 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
925 osb->slot_num);
926 if (!inode[type]) {
927 status = -ENOENT;
928 goto out_quota_off;
929 }
930 status = dquot_load_quota_inode(inode[type], type, QFMT_OCFS2,
931 DQUOT_USAGE_ENABLED);
932 if (status < 0)
933 goto out_quota_off;
934 }
935
936 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
937 iput(inode[type]);
938 return 0;
939 out_quota_off:
940 ocfs2_disable_quotas(osb);
941 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
942 iput(inode[type]);
943 mlog_errno(status);
944 return status;
945 }
946
ocfs2_disable_quotas(struct ocfs2_super * osb)947 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
948 {
949 int type;
950 struct inode *inode;
951 struct super_block *sb = osb->sb;
952 struct ocfs2_mem_dqinfo *oinfo;
953
954 /* We mostly ignore errors in this function because there's not much
955 * we can do when we see them */
956 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
957 if (!sb_has_quota_loaded(sb, type))
958 continue;
959 if (!sb_has_quota_suspended(sb, type)) {
960 oinfo = sb_dqinfo(sb, type)->dqi_priv;
961 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
962 }
963 inode = igrab(sb->s_dquot.files[type]);
964 /* Turn off quotas. This will remove all dquot structures from
965 * memory and so they will be automatically synced to global
966 * quota files */
967 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
968 DQUOT_LIMITS_ENABLED);
969 iput(inode);
970 }
971 }
972
ocfs2_fill_super(struct super_block * sb,struct fs_context * fc)973 static int ocfs2_fill_super(struct super_block *sb, struct fs_context *fc)
974 {
975 struct dentry *root;
976 int status, sector_size;
977 struct mount_options *parsed_options = fc->fs_private;
978 struct inode *inode = NULL;
979 struct ocfs2_super *osb = NULL;
980 struct buffer_head *bh = NULL;
981 char nodestr[12];
982 struct ocfs2_blockcheck_stats stats;
983
984 trace_ocfs2_fill_super(sb, fc, fc->sb_flags & SB_SILENT);
985
986 /* probe for superblock */
987 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
988 if (status < 0) {
989 mlog(ML_ERROR, "superblock probe failed!\n");
990 goto out;
991 }
992
993 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
994 brelse(bh);
995 bh = NULL;
996 if (status < 0)
997 goto out;
998
999 osb = OCFS2_SB(sb);
1000
1001 if (!ocfs2_check_set_options(sb, parsed_options)) {
1002 status = -EINVAL;
1003 goto out_super;
1004 }
1005 osb->s_mount_opt = parsed_options->mount_opt;
1006 osb->s_atime_quantum = parsed_options->atime_quantum;
1007 osb->preferred_slot = parsed_options->slot;
1008 osb->osb_commit_interval = parsed_options->commit_interval;
1009
1010 ocfs2_la_set_sizes(osb, parsed_options->localalloc_opt);
1011 osb->osb_resv_level = parsed_options->resv_level;
1012 osb->osb_dir_resv_level = parsed_options->resv_level;
1013 if (parsed_options->dir_resv_level == -1)
1014 osb->osb_dir_resv_level = parsed_options->resv_level;
1015 else
1016 osb->osb_dir_resv_level = parsed_options->dir_resv_level;
1017
1018 status = ocfs2_verify_userspace_stack(osb, parsed_options);
1019 if (status)
1020 goto out_super;
1021
1022 sb->s_magic = OCFS2_SUPER_MAGIC;
1023
1024 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1025 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1026
1027 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1028 * heartbeat=none */
1029 if (bdev_read_only(sb->s_bdev)) {
1030 if (!sb_rdonly(sb)) {
1031 status = -EACCES;
1032 mlog(ML_ERROR, "Readonly device detected but readonly "
1033 "mount was not specified.\n");
1034 goto out_super;
1035 }
1036
1037 /* You should not be able to start a local heartbeat
1038 * on a readonly device. */
1039 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1040 status = -EROFS;
1041 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1042 "device.\n");
1043 goto out_super;
1044 }
1045
1046 status = ocfs2_check_journals_nolocks(osb);
1047 if (status < 0) {
1048 if (status == -EROFS)
1049 mlog(ML_ERROR, "Recovery required on readonly "
1050 "file system, but write access is "
1051 "unavailable.\n");
1052 goto out_super;
1053 }
1054
1055 ocfs2_set_ro_flag(osb, 1);
1056
1057 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1058 "Cluster services will not be used for this mount. "
1059 "Recovery will be skipped.\n", osb->dev_str);
1060 }
1061
1062 if (!ocfs2_is_hard_readonly(osb)) {
1063 if (sb_rdonly(sb))
1064 ocfs2_set_ro_flag(osb, 0);
1065 }
1066
1067 status = ocfs2_verify_heartbeat(osb);
1068 if (status < 0)
1069 goto out_super;
1070
1071 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1072 ocfs2_debugfs_root);
1073
1074 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1075 osb, &ocfs2_osb_debug_fops);
1076
1077 if (ocfs2_meta_ecc(osb)) {
1078 ocfs2_initialize_journal_triggers(sb, osb->s_journal_triggers);
1079 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1080 osb->osb_debug_root);
1081 }
1082
1083 status = ocfs2_mount_volume(sb);
1084 if (status < 0)
1085 goto out_debugfs;
1086
1087 if (osb->root_inode)
1088 inode = igrab(osb->root_inode);
1089
1090 if (!inode) {
1091 status = -EIO;
1092 goto out_dismount;
1093 }
1094
1095 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1096 &ocfs2_kset->kobj);
1097 if (!osb->osb_dev_kset) {
1098 status = -ENOMEM;
1099 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1100 goto out_dismount;
1101 }
1102
1103 /* Create filecheck sysfs related directories/files at
1104 * /sys/fs/ocfs2/<devname>/filecheck */
1105 if (ocfs2_filecheck_create_sysfs(osb)) {
1106 status = -ENOMEM;
1107 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1108 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1109 goto out_dismount;
1110 }
1111
1112 root = d_make_root(inode);
1113 if (!root) {
1114 status = -ENOMEM;
1115 goto out_dismount;
1116 }
1117
1118 sb->s_root = root;
1119
1120 ocfs2_complete_mount_recovery(osb);
1121
1122 if (ocfs2_mount_local(osb))
1123 snprintf(nodestr, sizeof(nodestr), "local");
1124 else
1125 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1126
1127 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1128 "with %s data mode.\n",
1129 osb->dev_str, nodestr, osb->slot_num,
1130 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1131 "ordered");
1132
1133 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1134 wake_up(&osb->osb_mount_event);
1135
1136 /* Now we can initialize quotas because we can afford to wait
1137 * for cluster locks recovery now. That also means that truncation
1138 * log recovery can happen but that waits for proper quota setup */
1139 if (!sb_rdonly(sb)) {
1140 status = ocfs2_enable_quotas(osb);
1141 if (status < 0) {
1142 /* We have to err-out specially here because
1143 * s_root is already set */
1144 mlog_errno(status);
1145 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1146 wake_up(&osb->osb_mount_event);
1147 return status;
1148 }
1149 }
1150
1151 ocfs2_complete_quota_recovery(osb);
1152
1153 /* Now we wake up again for processes waiting for quotas */
1154 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1155 wake_up(&osb->osb_mount_event);
1156
1157 /* Start this when the mount is almost sure of being successful */
1158 ocfs2_orphan_scan_start(osb);
1159
1160 return status;
1161
1162 out_dismount:
1163 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1164 wake_up(&osb->osb_mount_event);
1165 ocfs2_free_replay_slots(osb);
1166 ocfs2_dismount_volume(sb, 1);
1167 goto out;
1168
1169 out_debugfs:
1170 debugfs_remove_recursive(osb->osb_debug_root);
1171 out_super:
1172 ocfs2_release_system_inodes(osb);
1173 kfree(osb->recovery_map);
1174 ocfs2_delete_osb(osb);
1175 kfree(osb);
1176 out:
1177 mlog_errno(status);
1178
1179 return status;
1180 }
1181
ocfs2_get_tree(struct fs_context * fc)1182 static int ocfs2_get_tree(struct fs_context *fc)
1183 {
1184 return get_tree_bdev(fc, ocfs2_fill_super);
1185 }
1186
ocfs2_free_fc(struct fs_context * fc)1187 static void ocfs2_free_fc(struct fs_context *fc)
1188 {
1189 kfree(fc->fs_private);
1190 }
1191
1192 static const struct fs_context_operations ocfs2_context_ops = {
1193 .parse_param = ocfs2_parse_param,
1194 .get_tree = ocfs2_get_tree,
1195 .reconfigure = ocfs2_reconfigure,
1196 .free = ocfs2_free_fc,
1197 };
1198
ocfs2_init_fs_context(struct fs_context * fc)1199 static int ocfs2_init_fs_context(struct fs_context *fc)
1200 {
1201 struct mount_options *mopt;
1202
1203 mopt = kzalloc(sizeof(struct mount_options), GFP_KERNEL);
1204 if (!mopt)
1205 return -EINVAL;
1206
1207 mopt->commit_interval = 0;
1208 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1209 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1210 mopt->slot = OCFS2_INVALID_SLOT;
1211 mopt->localalloc_opt = -1;
1212 mopt->cluster_stack[0] = '\0';
1213 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1214 mopt->dir_resv_level = -1;
1215
1216 fc->fs_private = mopt;
1217 fc->ops = &ocfs2_context_ops;
1218
1219 return 0;
1220 }
1221
1222 static struct file_system_type ocfs2_fs_type = {
1223 .owner = THIS_MODULE,
1224 .name = "ocfs2",
1225 .kill_sb = kill_block_super,
1226 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1227 .next = NULL,
1228 .init_fs_context = ocfs2_init_fs_context,
1229 .parameters = ocfs2_param_spec,
1230 };
1231 MODULE_ALIAS_FS("ocfs2");
1232
ocfs2_check_set_options(struct super_block * sb,struct mount_options * options)1233 static int ocfs2_check_set_options(struct super_block *sb,
1234 struct mount_options *options)
1235 {
1236 if (options->user_stack == 0) {
1237 u32 tmp;
1238
1239 /* Ensure only one heartbeat mode */
1240 tmp = options->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1241 OCFS2_MOUNT_HB_GLOBAL |
1242 OCFS2_MOUNT_HB_NONE);
1243 if (hweight32(tmp) != 1) {
1244 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1245 return 0;
1246 }
1247 }
1248 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1249 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1250 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1251 mlog(ML_ERROR, "User quotas were requested, but this "
1252 "filesystem does not have the feature enabled.\n");
1253 return 0;
1254 }
1255 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1256 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1257 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1258 mlog(ML_ERROR, "Group quotas were requested, but this "
1259 "filesystem does not have the feature enabled.\n");
1260 return 0;
1261 }
1262 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1263 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1264 mlog(ML_ERROR, "ACL support requested but extended attributes "
1265 "feature is not enabled\n");
1266 return 0;
1267 }
1268 /* No ACL setting specified? Use XATTR feature... */
1269 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1270 OCFS2_MOUNT_NO_POSIX_ACL))) {
1271 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1272 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1273 else
1274 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1275 }
1276 return 1;
1277 }
1278
ocfs2_parse_param(struct fs_context * fc,struct fs_parameter * param)1279 static int ocfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
1280 {
1281 struct fs_parse_result result;
1282 int opt;
1283 struct mount_options *mopt = fc->fs_private;
1284 bool is_remount = (fc->purpose & FS_CONTEXT_FOR_RECONFIGURE);
1285
1286 trace_ocfs2_parse_options(is_remount, param->key);
1287
1288 opt = fs_parse(fc, ocfs2_param_spec, param, &result);
1289 if (opt < 0)
1290 return opt;
1291
1292 switch (opt) {
1293 case Opt_heartbeat:
1294 mopt->mount_opt |= result.uint_32;
1295 break;
1296 case Opt_barrier:
1297 if (result.uint_32)
1298 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1299 else
1300 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1301 break;
1302 case Opt_intr:
1303 if (result.negated)
1304 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1305 else
1306 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1307 break;
1308 case Opt_errors:
1309 mopt->mount_opt &= ~(OCFS2_MOUNT_ERRORS_CONT |
1310 OCFS2_MOUNT_ERRORS_ROFS |
1311 OCFS2_MOUNT_ERRORS_PANIC);
1312 mopt->mount_opt |= result.uint_32;
1313 break;
1314 case Opt_data:
1315 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1316 mopt->mount_opt |= result.uint_32;
1317 break;
1318 case Opt_user_xattr:
1319 if (result.negated)
1320 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1321 else
1322 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1323 break;
1324 case Opt_atime_quantum:
1325 mopt->atime_quantum = result.uint_32;
1326 break;
1327 case Opt_slot:
1328 if (result.uint_32)
1329 mopt->slot = (u16)result.uint_32;
1330 break;
1331 case Opt_commit:
1332 if (result.uint_32 == 0)
1333 mopt->commit_interval = HZ * JBD2_DEFAULT_MAX_COMMIT_AGE;
1334 else
1335 mopt->commit_interval = HZ * result.uint_32;
1336 break;
1337 case Opt_localalloc:
1338 if (result.int_32 >= 0)
1339 mopt->localalloc_opt = result.int_32;
1340 break;
1341 case Opt_localflocks:
1342 /*
1343 * Changing this during remount could race flock() requests, or
1344 * "unbalance" existing ones (e.g., a lock is taken in one mode
1345 * but dropped in the other). If users care enough to flip
1346 * locking modes during remount, we could add a "local" flag to
1347 * individual flock structures for proper tracking of state.
1348 */
1349 if (!is_remount)
1350 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1351 break;
1352 case Opt_stack:
1353 /* Check both that the option we were passed is of the right
1354 * length and that it is a proper string of the right length.
1355 */
1356 if (strlen(param->string) != OCFS2_STACK_LABEL_LEN) {
1357 mlog(ML_ERROR, "Invalid cluster_stack option\n");
1358 return -EINVAL;
1359 }
1360 memcpy(mopt->cluster_stack, param->string, OCFS2_STACK_LABEL_LEN);
1361 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1362 /*
1363 * Open code the memcmp here as we don't have an osb to pass
1364 * to ocfs2_userspace_stack().
1365 */
1366 if (memcmp(mopt->cluster_stack,
1367 OCFS2_CLASSIC_CLUSTER_STACK,
1368 OCFS2_STACK_LABEL_LEN))
1369 mopt->user_stack = 1;
1370 break;
1371 case Opt_inode64:
1372 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1373 break;
1374 case Opt_usrquota:
1375 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1376 break;
1377 case Opt_grpquota:
1378 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1379 break;
1380 case Opt_coherency:
1381 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1382 mopt->mount_opt |= result.uint_32;
1383 break;
1384 case Opt_acl:
1385 if (result.negated) {
1386 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1387 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1388 } else {
1389 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1390 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1391 }
1392 break;
1393 case Opt_resv_level:
1394 if (is_remount)
1395 break;
1396 if (result.uint_32 >= OCFS2_MIN_RESV_LEVEL &&
1397 result.uint_32 < OCFS2_MAX_RESV_LEVEL)
1398 mopt->resv_level = result.uint_32;
1399 break;
1400 case Opt_dir_resv_level:
1401 if (is_remount)
1402 break;
1403 if (result.uint_32 >= OCFS2_MIN_RESV_LEVEL &&
1404 result.uint_32 < OCFS2_MAX_RESV_LEVEL)
1405 mopt->dir_resv_level = result.uint_32;
1406 break;
1407 case Opt_journal_async_commit:
1408 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1409 break;
1410 default:
1411 return -EINVAL;
1412 }
1413
1414 return 0;
1415 }
1416
ocfs2_show_options(struct seq_file * s,struct dentry * root)1417 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1418 {
1419 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1420 unsigned long opts = osb->s_mount_opt;
1421 unsigned int local_alloc_megs;
1422
1423 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1424 seq_printf(s, ",_netdev");
1425 if (opts & OCFS2_MOUNT_HB_LOCAL)
1426 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1427 else
1428 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1429 } else
1430 seq_printf(s, ",%s", OCFS2_HB_NONE);
1431
1432 if (opts & OCFS2_MOUNT_NOINTR)
1433 seq_printf(s, ",nointr");
1434
1435 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1436 seq_printf(s, ",data=writeback");
1437 else
1438 seq_printf(s, ",data=ordered");
1439
1440 if (opts & OCFS2_MOUNT_BARRIER)
1441 seq_printf(s, ",barrier=1");
1442
1443 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1444 seq_printf(s, ",errors=panic");
1445 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1446 seq_printf(s, ",errors=continue");
1447 else
1448 seq_printf(s, ",errors=remount-ro");
1449
1450 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1451 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1452
1453 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1454
1455 if (osb->osb_commit_interval)
1456 seq_printf(s, ",commit=%u",
1457 (unsigned) (osb->osb_commit_interval / HZ));
1458
1459 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1460 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1461 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1462
1463 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1464 seq_printf(s, ",localflocks,");
1465
1466 if (osb->osb_cluster_stack[0])
1467 seq_show_option(s, "cluster_stack", osb->osb_cluster_stack);
1468 if (opts & OCFS2_MOUNT_USRQUOTA)
1469 seq_printf(s, ",usrquota");
1470 if (opts & OCFS2_MOUNT_GRPQUOTA)
1471 seq_printf(s, ",grpquota");
1472
1473 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1474 seq_printf(s, ",coherency=buffered");
1475 else
1476 seq_printf(s, ",coherency=full");
1477
1478 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1479 seq_printf(s, ",nouser_xattr");
1480 else
1481 seq_printf(s, ",user_xattr");
1482
1483 if (opts & OCFS2_MOUNT_INODE64)
1484 seq_printf(s, ",inode64");
1485
1486 if (opts & OCFS2_MOUNT_POSIX_ACL)
1487 seq_printf(s, ",acl");
1488 else
1489 seq_printf(s, ",noacl");
1490
1491 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1492 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1493
1494 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1495 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1496
1497 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1498 seq_printf(s, ",journal_async_commit");
1499
1500 return 0;
1501 }
1502
ocfs2_init(void)1503 static int __init ocfs2_init(void)
1504 {
1505 int status;
1506
1507 status = init_ocfs2_uptodate_cache();
1508 if (status < 0)
1509 goto out1;
1510
1511 status = ocfs2_initialize_mem_caches();
1512 if (status < 0)
1513 goto out2;
1514
1515 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1516
1517 ocfs2_set_locking_protocol();
1518
1519 register_quota_format(&ocfs2_quota_format);
1520
1521 status = register_filesystem(&ocfs2_fs_type);
1522 if (!status)
1523 return 0;
1524
1525 unregister_quota_format(&ocfs2_quota_format);
1526 debugfs_remove(ocfs2_debugfs_root);
1527 ocfs2_free_mem_caches();
1528 out2:
1529 exit_ocfs2_uptodate_cache();
1530 out1:
1531 mlog_errno(status);
1532 return status;
1533 }
1534
ocfs2_exit(void)1535 static void __exit ocfs2_exit(void)
1536 {
1537 unregister_quota_format(&ocfs2_quota_format);
1538
1539 debugfs_remove(ocfs2_debugfs_root);
1540
1541 ocfs2_free_mem_caches();
1542
1543 unregister_filesystem(&ocfs2_fs_type);
1544
1545 exit_ocfs2_uptodate_cache();
1546 }
1547
ocfs2_put_super(struct super_block * sb)1548 static void ocfs2_put_super(struct super_block *sb)
1549 {
1550 trace_ocfs2_put_super(sb);
1551
1552 ocfs2_sync_blockdev(sb);
1553 ocfs2_dismount_volume(sb, 0);
1554 }
1555
ocfs2_statfs(struct dentry * dentry,struct kstatfs * buf)1556 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1557 {
1558 struct ocfs2_super *osb;
1559 u32 numbits, freebits;
1560 int status;
1561 struct ocfs2_dinode *bm_lock;
1562 struct buffer_head *bh = NULL;
1563 struct inode *inode = NULL;
1564
1565 trace_ocfs2_statfs(dentry->d_sb, buf);
1566
1567 osb = OCFS2_SB(dentry->d_sb);
1568
1569 inode = ocfs2_get_system_file_inode(osb,
1570 GLOBAL_BITMAP_SYSTEM_INODE,
1571 OCFS2_INVALID_SLOT);
1572 if (!inode) {
1573 mlog(ML_ERROR, "failed to get bitmap inode\n");
1574 status = -EIO;
1575 goto bail;
1576 }
1577
1578 status = ocfs2_inode_lock(inode, &bh, 0);
1579 if (status < 0) {
1580 mlog_errno(status);
1581 goto bail;
1582 }
1583
1584 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1585
1586 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1587 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1588
1589 buf->f_type = OCFS2_SUPER_MAGIC;
1590 buf->f_bsize = dentry->d_sb->s_blocksize;
1591 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1592 buf->f_blocks = ((sector_t) numbits) *
1593 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1594 buf->f_bfree = ((sector_t) freebits) *
1595 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1596 buf->f_bavail = buf->f_bfree;
1597 buf->f_files = numbits;
1598 buf->f_ffree = freebits;
1599 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1600 & 0xFFFFFFFFUL;
1601 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1602 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1603
1604 brelse(bh);
1605
1606 ocfs2_inode_unlock(inode, 0);
1607 status = 0;
1608 bail:
1609 iput(inode);
1610
1611 if (status)
1612 mlog_errno(status);
1613
1614 return status;
1615 }
1616
ocfs2_inode_init_once(void * data)1617 static void ocfs2_inode_init_once(void *data)
1618 {
1619 struct ocfs2_inode_info *oi = data;
1620
1621 oi->ip_flags = 0;
1622 oi->ip_open_count = 0;
1623 spin_lock_init(&oi->ip_lock);
1624 ocfs2_extent_map_init(&oi->vfs_inode);
1625 INIT_LIST_HEAD(&oi->ip_io_markers);
1626 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1627 oi->ip_dir_start_lookup = 0;
1628 init_rwsem(&oi->ip_alloc_sem);
1629 init_rwsem(&oi->ip_xattr_sem);
1630 mutex_init(&oi->ip_io_mutex);
1631
1632 oi->ip_blkno = 0ULL;
1633 oi->ip_clusters = 0;
1634 oi->ip_next_orphan = NULL;
1635
1636 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1637
1638 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1639 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1640 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1641
1642 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1643 &ocfs2_inode_caching_ops);
1644
1645 inode_init_once(&oi->vfs_inode);
1646 }
1647
ocfs2_initialize_mem_caches(void)1648 static int ocfs2_initialize_mem_caches(void)
1649 {
1650 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1651 sizeof(struct ocfs2_inode_info),
1652 0,
1653 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1654 SLAB_ACCOUNT),
1655 ocfs2_inode_init_once);
1656 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1657 sizeof(struct ocfs2_dquot),
1658 0,
1659 SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
1660 NULL);
1661 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1662 sizeof(struct ocfs2_quota_chunk),
1663 0,
1664 SLAB_RECLAIM_ACCOUNT,
1665 NULL);
1666 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1667 !ocfs2_qf_chunk_cachep) {
1668 kmem_cache_destroy(ocfs2_inode_cachep);
1669 kmem_cache_destroy(ocfs2_dquot_cachep);
1670 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1671 return -ENOMEM;
1672 }
1673
1674 return 0;
1675 }
1676
ocfs2_free_mem_caches(void)1677 static void ocfs2_free_mem_caches(void)
1678 {
1679 /*
1680 * Make sure all delayed rcu free inodes are flushed before we
1681 * destroy cache.
1682 */
1683 rcu_barrier();
1684 kmem_cache_destroy(ocfs2_inode_cachep);
1685 ocfs2_inode_cachep = NULL;
1686
1687 kmem_cache_destroy(ocfs2_dquot_cachep);
1688 ocfs2_dquot_cachep = NULL;
1689
1690 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1691 ocfs2_qf_chunk_cachep = NULL;
1692 }
1693
ocfs2_get_sector(struct super_block * sb,struct buffer_head ** bh,int block,int sect_size)1694 static int ocfs2_get_sector(struct super_block *sb,
1695 struct buffer_head **bh,
1696 int block,
1697 int sect_size)
1698 {
1699 if (!sb_set_blocksize(sb, sect_size)) {
1700 mlog(ML_ERROR, "unable to set blocksize\n");
1701 return -EIO;
1702 }
1703
1704 *bh = sb_getblk(sb, block);
1705 if (!*bh) {
1706 mlog_errno(-ENOMEM);
1707 return -ENOMEM;
1708 }
1709 lock_buffer(*bh);
1710 if (!buffer_dirty(*bh))
1711 clear_buffer_uptodate(*bh);
1712 unlock_buffer(*bh);
1713 if (bh_read(*bh, 0) < 0) {
1714 mlog_errno(-EIO);
1715 brelse(*bh);
1716 *bh = NULL;
1717 return -EIO;
1718 }
1719
1720 return 0;
1721 }
1722
ocfs2_mount_volume(struct super_block * sb)1723 static int ocfs2_mount_volume(struct super_block *sb)
1724 {
1725 int status = 0;
1726 struct ocfs2_super *osb = OCFS2_SB(sb);
1727
1728 if (ocfs2_is_hard_readonly(osb))
1729 goto out;
1730
1731 mutex_init(&osb->obs_trim_fs_mutex);
1732
1733 status = ocfs2_dlm_init(osb);
1734 if (status < 0) {
1735 mlog_errno(status);
1736 if (status == -EBADR && ocfs2_userspace_stack(osb))
1737 mlog(ML_ERROR, "couldn't mount because cluster name on"
1738 " disk does not match the running cluster name.\n");
1739 goto out;
1740 }
1741
1742 status = ocfs2_super_lock(osb, 1);
1743 if (status < 0) {
1744 mlog_errno(status);
1745 goto out_dlm;
1746 }
1747
1748 /* This will load up the node map and add ourselves to it. */
1749 status = ocfs2_find_slot(osb);
1750 if (status < 0) {
1751 mlog_errno(status);
1752 goto out_super_lock;
1753 }
1754
1755 /* load all node-local system inodes */
1756 status = ocfs2_init_local_system_inodes(osb);
1757 if (status < 0) {
1758 mlog_errno(status);
1759 goto out_super_lock;
1760 }
1761
1762 status = ocfs2_check_volume(osb);
1763 if (status < 0) {
1764 mlog_errno(status);
1765 goto out_system_inodes;
1766 }
1767
1768 status = ocfs2_truncate_log_init(osb);
1769 if (status < 0) {
1770 mlog_errno(status);
1771 goto out_check_volume;
1772 }
1773
1774 ocfs2_super_unlock(osb, 1);
1775 return 0;
1776
1777 out_check_volume:
1778 ocfs2_free_replay_slots(osb);
1779 out_system_inodes:
1780 if (osb->local_alloc_state == OCFS2_LA_ENABLED)
1781 ocfs2_shutdown_local_alloc(osb);
1782 ocfs2_release_system_inodes(osb);
1783 /* before journal shutdown, we should release slot_info */
1784 ocfs2_free_slot_info(osb);
1785 ocfs2_journal_shutdown(osb);
1786 out_super_lock:
1787 ocfs2_super_unlock(osb, 1);
1788 out_dlm:
1789 ocfs2_dlm_shutdown(osb, 0);
1790 out:
1791 return status;
1792 }
1793
ocfs2_dismount_volume(struct super_block * sb,int mnt_err)1794 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1795 {
1796 int tmp, hangup_needed = 0;
1797 struct ocfs2_super *osb = NULL;
1798 char nodestr[12];
1799
1800 trace_ocfs2_dismount_volume(sb);
1801
1802 BUG_ON(!sb);
1803 osb = OCFS2_SB(sb);
1804 BUG_ON(!osb);
1805
1806 /* Remove file check sysfs related directories/files,
1807 * and wait for the pending file check operations */
1808 ocfs2_filecheck_remove_sysfs(osb);
1809
1810 kset_unregister(osb->osb_dev_kset);
1811
1812 /* Orphan scan should be stopped as early as possible */
1813 ocfs2_orphan_scan_stop(osb);
1814
1815 ocfs2_disable_quotas(osb);
1816
1817 /* All dquots should be freed by now */
1818 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1819 /* Wait for worker to be done with the work structure in osb */
1820 cancel_work_sync(&osb->dquot_drop_work);
1821
1822 ocfs2_shutdown_local_alloc(osb);
1823
1824 ocfs2_truncate_log_shutdown(osb);
1825
1826 /* This will disable recovery and flush any recovery work. */
1827 ocfs2_recovery_exit(osb);
1828
1829 ocfs2_sync_blockdev(sb);
1830
1831 ocfs2_purge_refcount_trees(osb);
1832
1833 /* No cluster connection means we've failed during mount, so skip
1834 * all the steps which depended on that to complete. */
1835 if (osb->cconn) {
1836 tmp = ocfs2_super_lock(osb, 1);
1837 if (tmp < 0) {
1838 mlog_errno(tmp);
1839 return;
1840 }
1841 }
1842
1843 if (osb->slot_num != OCFS2_INVALID_SLOT)
1844 ocfs2_put_slot(osb);
1845
1846 if (osb->cconn)
1847 ocfs2_super_unlock(osb, 1);
1848
1849 ocfs2_release_system_inodes(osb);
1850
1851 ocfs2_journal_shutdown(osb);
1852
1853 /*
1854 * If we're dismounting due to mount error, mount.ocfs2 will clean
1855 * up heartbeat. If we're a local mount, there is no heartbeat.
1856 * If we failed before we got a uuid_str yet, we can't stop
1857 * heartbeat. Otherwise, do it.
1858 */
1859 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1860 !ocfs2_is_hard_readonly(osb))
1861 hangup_needed = 1;
1862
1863 ocfs2_dlm_shutdown(osb, hangup_needed);
1864
1865 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1866 debugfs_remove_recursive(osb->osb_debug_root);
1867
1868 if (hangup_needed)
1869 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1870
1871 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1872
1873 if (ocfs2_mount_local(osb))
1874 snprintf(nodestr, sizeof(nodestr), "local");
1875 else
1876 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1877
1878 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1879 osb->dev_str, nodestr);
1880
1881 ocfs2_delete_osb(osb);
1882 kfree(osb);
1883 sb->s_dev = 0;
1884 sb->s_fs_info = NULL;
1885 }
1886
ocfs2_setup_osb_uuid(struct ocfs2_super * osb,const unsigned char * uuid,unsigned uuid_bytes)1887 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1888 unsigned uuid_bytes)
1889 {
1890 int i, ret;
1891 char *ptr;
1892
1893 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1894
1895 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1896 if (osb->uuid_str == NULL)
1897 return -ENOMEM;
1898
1899 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1900 /* print with null */
1901 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1902 if (ret != 2) /* drop super cleans up */
1903 return -EINVAL;
1904 /* then only advance past the last char */
1905 ptr += 2;
1906 }
1907
1908 return 0;
1909 }
1910
1911 /* Make sure entire volume is addressable by our journal. Requires
1912 osb_clusters_at_boot to be valid and for the journal to have been
1913 initialized by ocfs2_journal_init(). */
ocfs2_journal_addressable(struct ocfs2_super * osb)1914 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1915 {
1916 int status = 0;
1917 u64 max_block =
1918 ocfs2_clusters_to_blocks(osb->sb,
1919 osb->osb_clusters_at_boot) - 1;
1920
1921 /* 32-bit block number is always OK. */
1922 if (max_block <= (u32)~0ULL)
1923 goto out;
1924
1925 /* Volume is "huge", so see if our journal is new enough to
1926 support it. */
1927 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1928 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1929 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1930 JBD2_FEATURE_INCOMPAT_64BIT))) {
1931 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1932 "Enable the 'block64' journal option with tunefs.ocfs2");
1933 status = -EFBIG;
1934 goto out;
1935 }
1936
1937 out:
1938 return status;
1939 }
1940
ocfs2_initialize_super(struct super_block * sb,struct buffer_head * bh,int sector_size,struct ocfs2_blockcheck_stats * stats)1941 static int ocfs2_initialize_super(struct super_block *sb,
1942 struct buffer_head *bh,
1943 int sector_size,
1944 struct ocfs2_blockcheck_stats *stats)
1945 {
1946 int status;
1947 int i, cbits, bbits;
1948 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1949 struct inode *inode = NULL;
1950 struct ocfs2_super *osb;
1951 u64 total_blocks;
1952
1953 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1954 if (!osb) {
1955 status = -ENOMEM;
1956 mlog_errno(status);
1957 goto out;
1958 }
1959
1960 sb->s_fs_info = osb;
1961 sb->s_op = &ocfs2_sops;
1962 sb->s_d_op = &ocfs2_dentry_ops;
1963 sb->s_export_op = &ocfs2_export_ops;
1964 sb->s_qcop = &dquot_quotactl_sysfile_ops;
1965 sb->dq_op = &ocfs2_quota_operations;
1966 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1967 sb->s_xattr = ocfs2_xattr_handlers;
1968 sb->s_time_gran = 1;
1969 sb->s_flags |= SB_NOATIME;
1970 /* this is needed to support O_LARGEFILE */
1971 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1972 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1973 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1974 super_set_uuid(sb, di->id2.i_super.s_uuid,
1975 sizeof(di->id2.i_super.s_uuid));
1976
1977 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
1978
1979 for (i = 0; i < 3; i++)
1980 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
1981 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1982
1983 osb->sb = sb;
1984 osb->s_sectsize_bits = blksize_bits(sector_size);
1985 BUG_ON(!osb->s_sectsize_bits);
1986
1987 spin_lock_init(&osb->dc_task_lock);
1988 init_waitqueue_head(&osb->dc_event);
1989 osb->dc_work_sequence = 0;
1990 osb->dc_wake_sequence = 0;
1991 INIT_LIST_HEAD(&osb->blocked_lock_list);
1992 osb->blocked_lock_count = 0;
1993 spin_lock_init(&osb->osb_lock);
1994 spin_lock_init(&osb->osb_xattr_lock);
1995 ocfs2_init_steal_slots(osb);
1996
1997 mutex_init(&osb->system_file_mutex);
1998
1999 atomic_set(&osb->alloc_stats.moves, 0);
2000 atomic_set(&osb->alloc_stats.local_data, 0);
2001 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2002 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2003 atomic_set(&osb->alloc_stats.bg_extends, 0);
2004
2005 /* Copy the blockcheck stats from the superblock probe */
2006 osb->osb_ecc_stats = *stats;
2007
2008 ocfs2_init_node_maps(osb);
2009
2010 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2011 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2012
2013 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2014 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2015 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2016 osb->max_slots);
2017 status = -EINVAL;
2018 goto out;
2019 }
2020
2021 ocfs2_orphan_scan_init(osb);
2022
2023 status = ocfs2_recovery_init(osb);
2024 if (status) {
2025 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2026 mlog_errno(status);
2027 goto out;
2028 }
2029
2030 init_waitqueue_head(&osb->checkpoint_event);
2031
2032 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2033
2034 osb->slot_num = OCFS2_INVALID_SLOT;
2035
2036 osb->s_xattr_inline_size = le16_to_cpu(
2037 di->id2.i_super.s_xattr_inline_size);
2038
2039 osb->local_alloc_state = OCFS2_LA_UNUSED;
2040 osb->local_alloc_bh = NULL;
2041 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2042
2043 init_waitqueue_head(&osb->osb_mount_event);
2044
2045 ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2046
2047 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2048 if (!osb->vol_label) {
2049 mlog(ML_ERROR, "unable to alloc vol label\n");
2050 status = -ENOMEM;
2051 goto out_recovery_map;
2052 }
2053
2054 osb->slot_recovery_generations =
2055 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2056 GFP_KERNEL);
2057 if (!osb->slot_recovery_generations) {
2058 status = -ENOMEM;
2059 mlog_errno(status);
2060 goto out_vol_label;
2061 }
2062
2063 init_waitqueue_head(&osb->osb_wipe_event);
2064 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2065 sizeof(*osb->osb_orphan_wipes),
2066 GFP_KERNEL);
2067 if (!osb->osb_orphan_wipes) {
2068 status = -ENOMEM;
2069 mlog_errno(status);
2070 goto out_slot_recovery_gen;
2071 }
2072
2073 osb->osb_rf_lock_tree = RB_ROOT;
2074
2075 osb->s_feature_compat =
2076 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2077 osb->s_feature_ro_compat =
2078 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2079 osb->s_feature_incompat =
2080 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2081
2082 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2083 mlog(ML_ERROR, "couldn't mount because of unsupported "
2084 "optional features (%x).\n", i);
2085 status = -EINVAL;
2086 goto out_orphan_wipes;
2087 }
2088 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2089 mlog(ML_ERROR, "couldn't mount RDWR because of "
2090 "unsupported optional features (%x).\n", i);
2091 status = -EINVAL;
2092 goto out_orphan_wipes;
2093 }
2094
2095 if (ocfs2_clusterinfo_valid(osb)) {
2096 /*
2097 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null
2098 * terminated, so make sure no overflow happens here by using
2099 * memcpy. Destination strings will always be null terminated
2100 * because osb is allocated using kzalloc.
2101 */
2102 osb->osb_stackflags =
2103 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2104 memcpy(osb->osb_cluster_stack,
2105 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2106 OCFS2_STACK_LABEL_LEN);
2107 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2108 mlog(ML_ERROR,
2109 "couldn't mount because of an invalid "
2110 "cluster stack label (%s) \n",
2111 osb->osb_cluster_stack);
2112 status = -EINVAL;
2113 goto out_orphan_wipes;
2114 }
2115 memcpy(osb->osb_cluster_name,
2116 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2117 OCFS2_CLUSTER_NAME_LEN);
2118 } else {
2119 /* The empty string is identical with classic tools that
2120 * don't know about s_cluster_info. */
2121 osb->osb_cluster_stack[0] = '\0';
2122 }
2123
2124 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2125
2126 /*
2127 * FIXME
2128 * This should be done in ocfs2_journal_init(), but any inode
2129 * writes back operation will cause the filesystem to crash.
2130 */
2131 status = ocfs2_journal_alloc(osb);
2132 if (status < 0)
2133 goto out_orphan_wipes;
2134
2135 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2136 init_llist_head(&osb->dquot_drop_list);
2137
2138 /* get some pseudo constants for clustersize bits */
2139 osb->s_clustersize_bits =
2140 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2141 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2142
2143 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2144 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2145 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2146 osb->s_clustersize);
2147 status = -EINVAL;
2148 goto out_journal;
2149 }
2150
2151 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2152 le32_to_cpu(di->i_clusters));
2153
2154 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2155 total_blocks);
2156 if (status) {
2157 mlog(ML_ERROR, "Volume too large "
2158 "to mount safely on this system");
2159 status = -EFBIG;
2160 goto out_journal;
2161 }
2162
2163 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2164 sizeof(di->id2.i_super.s_uuid))) {
2165 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2166 status = -ENOMEM;
2167 goto out_journal;
2168 }
2169
2170 strscpy(osb->vol_label, di->id2.i_super.s_label,
2171 OCFS2_MAX_VOL_LABEL_LEN);
2172 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2173 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2174 osb->first_cluster_group_blkno =
2175 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2176 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2177 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2178 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2179 (unsigned long long)osb->root_blkno,
2180 (unsigned long long)osb->system_dir_blkno,
2181 osb->s_clustersize_bits);
2182
2183 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2184 if (!osb->osb_dlm_debug) {
2185 status = -ENOMEM;
2186 mlog_errno(status);
2187 goto out_uuid_str;
2188 }
2189
2190 atomic_set(&osb->vol_state, VOLUME_INIT);
2191
2192 /* load root, system_dir, and all global system inodes */
2193 status = ocfs2_init_global_system_inodes(osb);
2194 if (status < 0) {
2195 mlog_errno(status);
2196 goto out_dlm_out;
2197 }
2198
2199 /*
2200 * global bitmap
2201 */
2202 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2203 OCFS2_INVALID_SLOT);
2204 if (!inode) {
2205 status = -EINVAL;
2206 mlog_errno(status);
2207 goto out_system_inodes;
2208 }
2209
2210 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2211 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2212 iput(inode);
2213
2214 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2215 osb->s_feature_incompat) * 8;
2216
2217 status = ocfs2_init_slot_info(osb);
2218 if (status < 0) {
2219 mlog_errno(status);
2220 goto out_system_inodes;
2221 }
2222
2223 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2224 if (!osb->ocfs2_wq) {
2225 status = -ENOMEM;
2226 mlog_errno(status);
2227 goto out_slot_info;
2228 }
2229
2230 return status;
2231
2232 out_slot_info:
2233 ocfs2_free_slot_info(osb);
2234 out_system_inodes:
2235 ocfs2_release_system_inodes(osb);
2236 out_dlm_out:
2237 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2238 out_uuid_str:
2239 kfree(osb->uuid_str);
2240 out_journal:
2241 kfree(osb->journal);
2242 out_orphan_wipes:
2243 kfree(osb->osb_orphan_wipes);
2244 out_slot_recovery_gen:
2245 kfree(osb->slot_recovery_generations);
2246 out_vol_label:
2247 kfree(osb->vol_label);
2248 out_recovery_map:
2249 kfree(osb->recovery_map);
2250 out:
2251 kfree(osb);
2252 sb->s_fs_info = NULL;
2253 return status;
2254 }
2255
2256 /*
2257 * will return: -EAGAIN if it is ok to keep searching for superblocks
2258 * -EINVAL if there is a bad superblock
2259 * 0 on success
2260 */
ocfs2_verify_volume(struct ocfs2_dinode * di,struct buffer_head * bh,u32 blksz,struct ocfs2_blockcheck_stats * stats)2261 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2262 struct buffer_head *bh,
2263 u32 blksz,
2264 struct ocfs2_blockcheck_stats *stats)
2265 {
2266 int status = -EAGAIN;
2267 u32 blksz_bits;
2268
2269 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2270 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2271 /* We have to do a raw check of the feature here */
2272 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2273 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2274 status = ocfs2_block_check_validate(bh->b_data,
2275 bh->b_size,
2276 &di->i_check,
2277 stats);
2278 if (status)
2279 goto out;
2280 }
2281 status = -EINVAL;
2282 /* Acceptable block sizes are 512 bytes, 1K, 2K and 4K. */
2283 blksz_bits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2284 if (blksz_bits < 9 || blksz_bits > 12) {
2285 mlog(ML_ERROR, "found superblock with incorrect block "
2286 "size bits: found %u, should be 9, 10, 11, or 12\n",
2287 blksz_bits);
2288 } else if ((1 << blksz_bits) != blksz) {
2289 mlog(ML_ERROR, "found superblock with incorrect block "
2290 "size: found %u, should be %u\n", 1 << blksz_bits, blksz);
2291 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2292 OCFS2_MAJOR_REV_LEVEL ||
2293 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2294 OCFS2_MINOR_REV_LEVEL) {
2295 mlog(ML_ERROR, "found superblock with bad version: "
2296 "found %u.%u, should be %u.%u\n",
2297 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2298 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2299 OCFS2_MAJOR_REV_LEVEL,
2300 OCFS2_MINOR_REV_LEVEL);
2301 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2302 mlog(ML_ERROR, "bad block number on superblock: "
2303 "found %llu, should be %llu\n",
2304 (unsigned long long)le64_to_cpu(di->i_blkno),
2305 (unsigned long long)bh->b_blocknr);
2306 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2307 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2308 mlog(ML_ERROR, "bad cluster size bit found: %u\n",
2309 le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2310 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2311 mlog(ML_ERROR, "bad root_blkno: 0\n");
2312 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2313 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2314 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2315 mlog(ML_ERROR,
2316 "Superblock slots found greater than file system "
2317 "maximum: found %u, max %u\n",
2318 le16_to_cpu(di->id2.i_super.s_max_slots),
2319 OCFS2_MAX_SLOTS);
2320 } else {
2321 /* found it! */
2322 status = 0;
2323 }
2324 }
2325
2326 out:
2327 if (status && status != -EAGAIN)
2328 mlog_errno(status);
2329 return status;
2330 }
2331
ocfs2_check_volume(struct ocfs2_super * osb)2332 static int ocfs2_check_volume(struct ocfs2_super *osb)
2333 {
2334 int status;
2335 int dirty;
2336 int local;
2337 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2338 * recover
2339 * ourselves. */
2340
2341 /* Init our journal object. */
2342 status = ocfs2_journal_init(osb, &dirty);
2343 if (status < 0) {
2344 mlog(ML_ERROR, "Could not initialize journal!\n");
2345 goto finally;
2346 }
2347
2348 /* Now that journal has been initialized, check to make sure
2349 entire volume is addressable. */
2350 status = ocfs2_journal_addressable(osb);
2351 if (status)
2352 goto finally;
2353
2354 /* If the journal was unmounted cleanly then we don't want to
2355 * recover anything. Otherwise, journal_load will do that
2356 * dirty work for us :) */
2357 if (!dirty) {
2358 status = ocfs2_journal_wipe(osb->journal, 0);
2359 if (status < 0) {
2360 mlog_errno(status);
2361 goto finally;
2362 }
2363 } else {
2364 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2365 "unmounted cleanly, recovering it.\n", osb->dev_str);
2366 }
2367
2368 local = ocfs2_mount_local(osb);
2369
2370 /* will play back anything left in the journal. */
2371 status = ocfs2_journal_load(osb->journal, local, dirty);
2372 if (status < 0) {
2373 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2374 goto finally;
2375 }
2376
2377 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2378 jbd2_journal_set_features(osb->journal->j_journal,
2379 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2380 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2381 else
2382 jbd2_journal_clear_features(osb->journal->j_journal,
2383 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2384 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2385
2386 if (dirty) {
2387 /* recover my local alloc if we didn't unmount cleanly. */
2388 status = ocfs2_begin_local_alloc_recovery(osb,
2389 osb->slot_num,
2390 &local_alloc);
2391 if (status < 0) {
2392 mlog_errno(status);
2393 goto finally;
2394 }
2395 /* we complete the recovery process after we've marked
2396 * ourselves as mounted. */
2397 }
2398
2399 status = ocfs2_load_local_alloc(osb);
2400 if (status < 0) {
2401 mlog_errno(status);
2402 goto finally;
2403 }
2404
2405 if (dirty) {
2406 /* Recovery will be completed after we've mounted the
2407 * rest of the volume. */
2408 osb->local_alloc_copy = local_alloc;
2409 local_alloc = NULL;
2410 }
2411
2412 /* go through each journal, trylock it and if you get the
2413 * lock, and it's marked as dirty, set the bit in the recover
2414 * map and launch a recovery thread for it. */
2415 status = ocfs2_mark_dead_nodes(osb);
2416 if (status < 0) {
2417 mlog_errno(status);
2418 goto finally;
2419 }
2420
2421 status = ocfs2_compute_replay_slots(osb);
2422 if (status < 0)
2423 mlog_errno(status);
2424
2425 finally:
2426 kfree(local_alloc);
2427
2428 if (status)
2429 mlog_errno(status);
2430 return status;
2431 }
2432
2433 /*
2434 * The routine gets called from dismount or close whenever a dismount on
2435 * volume is requested and the osb open count becomes 1.
2436 * It will remove the osb from the global list and also free up all the
2437 * initialized resources and fileobject.
2438 */
ocfs2_delete_osb(struct ocfs2_super * osb)2439 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2440 {
2441 /* This function assumes that the caller has the main osb resource */
2442
2443 /* ocfs2_initializer_super have already created this workqueue */
2444 if (osb->ocfs2_wq)
2445 destroy_workqueue(osb->ocfs2_wq);
2446
2447 ocfs2_free_slot_info(osb);
2448
2449 kfree(osb->osb_orphan_wipes);
2450 kfree(osb->slot_recovery_generations);
2451 /* FIXME
2452 * This belongs in journal shutdown, but because we have to
2453 * allocate osb->journal at the middle of ocfs2_initialize_super(),
2454 * we free it here.
2455 */
2456 kfree(osb->journal);
2457 kfree(osb->local_alloc_copy);
2458 kfree(osb->uuid_str);
2459 kfree(osb->vol_label);
2460 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2461 memset(osb, 0, sizeof(struct ocfs2_super));
2462 }
2463
2464 /* Depending on the mount option passed, perform one of the following:
2465 * Put OCFS2 into a readonly state (default)
2466 * Return EIO so that only the process errs
2467 * Fix the error as if fsck.ocfs2 -y
2468 * panic
2469 */
ocfs2_handle_error(struct super_block * sb)2470 static int ocfs2_handle_error(struct super_block *sb)
2471 {
2472 struct ocfs2_super *osb = OCFS2_SB(sb);
2473 int rv = 0;
2474
2475 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2476 pr_crit("On-disk corruption discovered. "
2477 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2478
2479 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2480 panic("OCFS2: (device %s): panic forced after error\n",
2481 sb->s_id);
2482 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2483 pr_crit("OCFS2: Returning error to the calling process.\n");
2484 rv = -EIO;
2485 } else { /* default option */
2486 rv = -EROFS;
2487 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2488 return rv;
2489
2490 pr_crit("OCFS2: File system is now read-only.\n");
2491 sb->s_flags |= SB_RDONLY;
2492 ocfs2_set_ro_flag(osb, 0);
2493 }
2494
2495 return rv;
2496 }
2497
__ocfs2_error(struct super_block * sb,const char * function,const char * fmt,...)2498 int __ocfs2_error(struct super_block *sb, const char *function,
2499 const char *fmt, ...)
2500 {
2501 struct va_format vaf;
2502 va_list args;
2503
2504 va_start(args, fmt);
2505 vaf.fmt = fmt;
2506 vaf.va = &args;
2507
2508 /* Not using mlog here because we want to show the actual
2509 * function the error came from. */
2510 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2511 sb->s_id, function, &vaf);
2512
2513 va_end(args);
2514
2515 return ocfs2_handle_error(sb);
2516 }
2517
2518 /* Handle critical errors. This is intentionally more drastic than
2519 * ocfs2_handle_error, so we only use for things like journal errors,
2520 * etc. */
__ocfs2_abort(struct super_block * sb,const char * function,const char * fmt,...)2521 void __ocfs2_abort(struct super_block *sb, const char *function,
2522 const char *fmt, ...)
2523 {
2524 struct va_format vaf;
2525 va_list args;
2526
2527 va_start(args, fmt);
2528
2529 vaf.fmt = fmt;
2530 vaf.va = &args;
2531
2532 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2533 sb->s_id, function, &vaf);
2534
2535 va_end(args);
2536
2537 /* We don't have the cluster support yet to go straight to
2538 * hard readonly in here. Until then, we want to keep
2539 * ocfs2_abort() so that we can at least mark critical
2540 * errors.
2541 *
2542 * TODO: This should abort the journal and alert other nodes
2543 * that our slot needs recovery. */
2544
2545 /* Force a panic(). This stinks, but it's better than letting
2546 * things continue without having a proper hard readonly
2547 * here. */
2548 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2549 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2550 ocfs2_handle_error(sb);
2551 }
2552
2553 /*
2554 * Void signal blockers, because in-kernel sigprocmask() only fails
2555 * when SIG_* is wrong.
2556 */
ocfs2_block_signals(sigset_t * oldset)2557 void ocfs2_block_signals(sigset_t *oldset)
2558 {
2559 int rc;
2560 sigset_t blocked;
2561
2562 sigfillset(&blocked);
2563 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2564 BUG_ON(rc);
2565 }
2566
ocfs2_unblock_signals(sigset_t * oldset)2567 void ocfs2_unblock_signals(sigset_t *oldset)
2568 {
2569 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2570 BUG_ON(rc);
2571 }
2572
2573 module_init(ocfs2_init);
2574 module_exit(ocfs2_exit);
2575