1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * super.c
6 *
7 * load/unload driver, mount/dismount volumes
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 */
11
12 #include <linux/module.h>
13 #include <linux/fs.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/highmem.h>
17 #include <linux/init.h>
18 #include <linux/random.h>
19 #include <linux/statfs.h>
20 #include <linux/moduleparam.h>
21 #include <linux/blkdev.h>
22 #include <linux/socket.h>
23 #include <linux/inet.h>
24 #include <linux/parser.h>
25 #include <linux/crc32.h>
26 #include <linux/debugfs.h>
27 #include <linux/mount.h>
28 #include <linux/seq_file.h>
29 #include <linux/quotaops.h>
30 #include <linux/cleancache.h>
31 #include <linux/signal.h>
32
33 #define CREATE_TRACE_POINTS
34 #include "ocfs2_trace.h"
35
36 #include <cluster/masklog.h>
37
38 #include "ocfs2.h"
39
40 /* this should be the only file to include a version 1 header */
41 #include "ocfs1_fs_compat.h"
42
43 #include "alloc.h"
44 #include "aops.h"
45 #include "blockcheck.h"
46 #include "dlmglue.h"
47 #include "export.h"
48 #include "extent_map.h"
49 #include "heartbeat.h"
50 #include "inode.h"
51 #include "journal.h"
52 #include "localalloc.h"
53 #include "namei.h"
54 #include "slot_map.h"
55 #include "super.h"
56 #include "sysfile.h"
57 #include "uptodate.h"
58 #include "xattr.h"
59 #include "quota.h"
60 #include "refcounttree.h"
61 #include "suballoc.h"
62
63 #include "buffer_head_io.h"
64 #include "filecheck.h"
65
66 static struct kmem_cache *ocfs2_inode_cachep;
67 struct kmem_cache *ocfs2_dquot_cachep;
68 struct kmem_cache *ocfs2_qf_chunk_cachep;
69
70 static struct dentry *ocfs2_debugfs_root;
71
72 MODULE_AUTHOR("Oracle");
73 MODULE_LICENSE("GPL");
74 MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
75 MODULE_DESCRIPTION("OCFS2 cluster file system");
76
77 struct mount_options
78 {
79 unsigned long commit_interval;
80 unsigned long mount_opt;
81 unsigned int atime_quantum;
82 unsigned short slot;
83 int localalloc_opt;
84 unsigned int resv_level;
85 int dir_resv_level;
86 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
87 };
88
89 static int ocfs2_parse_options(struct super_block *sb, char *options,
90 struct mount_options *mopt,
91 int is_remount);
92 static int ocfs2_check_set_options(struct super_block *sb,
93 struct mount_options *options);
94 static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
95 static void ocfs2_put_super(struct super_block *sb);
96 static int ocfs2_mount_volume(struct super_block *sb);
97 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
98 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
99 static int ocfs2_initialize_mem_caches(void);
100 static void ocfs2_free_mem_caches(void);
101 static void ocfs2_delete_osb(struct ocfs2_super *osb);
102
103 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
104
105 static int ocfs2_sync_fs(struct super_block *sb, int wait);
106
107 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
108 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
109 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
110 static int ocfs2_check_volume(struct ocfs2_super *osb);
111 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
112 struct buffer_head *bh,
113 u32 sectsize,
114 struct ocfs2_blockcheck_stats *stats);
115 static int ocfs2_initialize_super(struct super_block *sb,
116 struct buffer_head *bh,
117 int sector_size,
118 struct ocfs2_blockcheck_stats *stats);
119 static int ocfs2_get_sector(struct super_block *sb,
120 struct buffer_head **bh,
121 int block,
122 int sect_size);
123 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
124 static void ocfs2_free_inode(struct inode *inode);
125 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
126 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
127 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
128
ocfs2_get_dquots(struct inode * inode)129 static struct dquot **ocfs2_get_dquots(struct inode *inode)
130 {
131 return OCFS2_I(inode)->i_dquot;
132 }
133
134 static const struct super_operations ocfs2_sops = {
135 .statfs = ocfs2_statfs,
136 .alloc_inode = ocfs2_alloc_inode,
137 .free_inode = ocfs2_free_inode,
138 .drop_inode = ocfs2_drop_inode,
139 .evict_inode = ocfs2_evict_inode,
140 .sync_fs = ocfs2_sync_fs,
141 .put_super = ocfs2_put_super,
142 .remount_fs = ocfs2_remount,
143 .show_options = ocfs2_show_options,
144 .quota_read = ocfs2_quota_read,
145 .quota_write = ocfs2_quota_write,
146 .get_dquots = ocfs2_get_dquots,
147 };
148
149 enum {
150 Opt_barrier,
151 Opt_err_panic,
152 Opt_err_ro,
153 Opt_intr,
154 Opt_nointr,
155 Opt_hb_none,
156 Opt_hb_local,
157 Opt_hb_global,
158 Opt_data_ordered,
159 Opt_data_writeback,
160 Opt_atime_quantum,
161 Opt_slot,
162 Opt_commit,
163 Opt_localalloc,
164 Opt_localflocks,
165 Opt_stack,
166 Opt_user_xattr,
167 Opt_nouser_xattr,
168 Opt_inode64,
169 Opt_acl,
170 Opt_noacl,
171 Opt_usrquota,
172 Opt_grpquota,
173 Opt_coherency_buffered,
174 Opt_coherency_full,
175 Opt_resv_level,
176 Opt_dir_resv_level,
177 Opt_journal_async_commit,
178 Opt_err_cont,
179 Opt_err,
180 };
181
182 static const match_table_t tokens = {
183 {Opt_barrier, "barrier=%u"},
184 {Opt_err_panic, "errors=panic"},
185 {Opt_err_ro, "errors=remount-ro"},
186 {Opt_intr, "intr"},
187 {Opt_nointr, "nointr"},
188 {Opt_hb_none, OCFS2_HB_NONE},
189 {Opt_hb_local, OCFS2_HB_LOCAL},
190 {Opt_hb_global, OCFS2_HB_GLOBAL},
191 {Opt_data_ordered, "data=ordered"},
192 {Opt_data_writeback, "data=writeback"},
193 {Opt_atime_quantum, "atime_quantum=%u"},
194 {Opt_slot, "preferred_slot=%u"},
195 {Opt_commit, "commit=%u"},
196 {Opt_localalloc, "localalloc=%d"},
197 {Opt_localflocks, "localflocks"},
198 {Opt_stack, "cluster_stack=%s"},
199 {Opt_user_xattr, "user_xattr"},
200 {Opt_nouser_xattr, "nouser_xattr"},
201 {Opt_inode64, "inode64"},
202 {Opt_acl, "acl"},
203 {Opt_noacl, "noacl"},
204 {Opt_usrquota, "usrquota"},
205 {Opt_grpquota, "grpquota"},
206 {Opt_coherency_buffered, "coherency=buffered"},
207 {Opt_coherency_full, "coherency=full"},
208 {Opt_resv_level, "resv_level=%u"},
209 {Opt_dir_resv_level, "dir_resv_level=%u"},
210 {Opt_journal_async_commit, "journal_async_commit"},
211 {Opt_err_cont, "errors=continue"},
212 {Opt_err, NULL}
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 = kmem_cache_alloc(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_remount(struct super_block * sb,int * flags,char * data)607 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
608 {
609 int incompat_features;
610 int ret = 0;
611 struct mount_options parsed_options;
612 struct ocfs2_super *osb = OCFS2_SB(sb);
613 u32 tmp;
614
615 sync_filesystem(sb);
616
617 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
618 !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)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
649 /* Disable quota accounting before remounting RO */
650 if (*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 (*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, *flags);
686 unlock_osb:
687 spin_unlock(&osb->osb_lock);
688 /* Enable quota accounting after remounting RW */
689 if (!ret && !(*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 if (!inode)
970 continue;
971 iput(inode);
972 }
973 }
974
ocfs2_fill_super(struct super_block * sb,void * data,int silent)975 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
976 {
977 struct dentry *root;
978 int status, sector_size;
979 struct mount_options parsed_options;
980 struct inode *inode = NULL;
981 struct ocfs2_super *osb = NULL;
982 struct buffer_head *bh = NULL;
983 char nodestr[12];
984 struct ocfs2_blockcheck_stats stats;
985
986 trace_ocfs2_fill_super(sb, data, silent);
987
988 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
989 status = -EINVAL;
990 goto out;
991 }
992
993 /* probe for superblock */
994 status = ocfs2_sb_probe(sb, &bh, §or_size, &stats);
995 if (status < 0) {
996 mlog(ML_ERROR, "superblock probe failed!\n");
997 goto out;
998 }
999
1000 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
1001 brelse(bh);
1002 bh = NULL;
1003 if (status < 0)
1004 goto out;
1005
1006 osb = OCFS2_SB(sb);
1007
1008 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1009 status = -EINVAL;
1010 goto out_super;
1011 }
1012 osb->s_mount_opt = parsed_options.mount_opt;
1013 osb->s_atime_quantum = parsed_options.atime_quantum;
1014 osb->preferred_slot = parsed_options.slot;
1015 osb->osb_commit_interval = parsed_options.commit_interval;
1016
1017 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
1018 osb->osb_resv_level = parsed_options.resv_level;
1019 osb->osb_dir_resv_level = parsed_options.resv_level;
1020 if (parsed_options.dir_resv_level == -1)
1021 osb->osb_dir_resv_level = parsed_options.resv_level;
1022 else
1023 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
1024
1025 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1026 if (status)
1027 goto out_super;
1028
1029 sb->s_magic = OCFS2_SUPER_MAGIC;
1030
1031 sb->s_flags = (sb->s_flags & ~(SB_POSIXACL | SB_NOSEC)) |
1032 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
1033
1034 /* Hard readonly mode only if: bdev_read_only, SB_RDONLY,
1035 * heartbeat=none */
1036 if (bdev_read_only(sb->s_bdev)) {
1037 if (!sb_rdonly(sb)) {
1038 status = -EACCES;
1039 mlog(ML_ERROR, "Readonly device detected but readonly "
1040 "mount was not specified.\n");
1041 goto out_super;
1042 }
1043
1044 /* You should not be able to start a local heartbeat
1045 * on a readonly device. */
1046 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1047 status = -EROFS;
1048 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1049 "device.\n");
1050 goto out_super;
1051 }
1052
1053 status = ocfs2_check_journals_nolocks(osb);
1054 if (status < 0) {
1055 if (status == -EROFS)
1056 mlog(ML_ERROR, "Recovery required on readonly "
1057 "file system, but write access is "
1058 "unavailable.\n");
1059 goto out_super;
1060 }
1061
1062 ocfs2_set_ro_flag(osb, 1);
1063
1064 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1065 "Cluster services will not be used for this mount. "
1066 "Recovery will be skipped.\n", osb->dev_str);
1067 }
1068
1069 if (!ocfs2_is_hard_readonly(osb)) {
1070 if (sb_rdonly(sb))
1071 ocfs2_set_ro_flag(osb, 0);
1072 }
1073
1074 status = ocfs2_verify_heartbeat(osb);
1075 if (status < 0)
1076 goto out_super;
1077
1078 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1079 ocfs2_debugfs_root);
1080
1081 debugfs_create_file("fs_state", S_IFREG|S_IRUSR, osb->osb_debug_root,
1082 osb, &ocfs2_osb_debug_fops);
1083
1084 if (ocfs2_meta_ecc(osb))
1085 ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
1086 osb->osb_debug_root);
1087
1088 status = ocfs2_mount_volume(sb);
1089 if (status < 0)
1090 goto out_debugfs;
1091
1092 if (osb->root_inode)
1093 inode = igrab(osb->root_inode);
1094
1095 if (!inode) {
1096 status = -EIO;
1097 goto out_dismount;
1098 }
1099
1100 osb->osb_dev_kset = kset_create_and_add(sb->s_id, NULL,
1101 &ocfs2_kset->kobj);
1102 if (!osb->osb_dev_kset) {
1103 status = -ENOMEM;
1104 mlog(ML_ERROR, "Unable to create device kset %s.\n", sb->s_id);
1105 goto out_dismount;
1106 }
1107
1108 /* Create filecheck sysfs related directories/files at
1109 * /sys/fs/ocfs2/<devname>/filecheck */
1110 if (ocfs2_filecheck_create_sysfs(osb)) {
1111 status = -ENOMEM;
1112 mlog(ML_ERROR, "Unable to create filecheck sysfs directory at "
1113 "/sys/fs/ocfs2/%s/filecheck.\n", sb->s_id);
1114 goto out_dismount;
1115 }
1116
1117 root = d_make_root(inode);
1118 if (!root) {
1119 status = -ENOMEM;
1120 goto out_dismount;
1121 }
1122
1123 sb->s_root = root;
1124
1125 ocfs2_complete_mount_recovery(osb);
1126
1127 if (ocfs2_mount_local(osb))
1128 snprintf(nodestr, sizeof(nodestr), "local");
1129 else
1130 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1131
1132 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
1133 "with %s data mode.\n",
1134 osb->dev_str, nodestr, osb->slot_num,
1135 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1136 "ordered");
1137
1138 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1139 wake_up(&osb->osb_mount_event);
1140
1141 /* Now we can initialize quotas because we can afford to wait
1142 * for cluster locks recovery now. That also means that truncation
1143 * log recovery can happen but that waits for proper quota setup */
1144 if (!sb_rdonly(sb)) {
1145 status = ocfs2_enable_quotas(osb);
1146 if (status < 0) {
1147 /* We have to err-out specially here because
1148 * s_root is already set */
1149 mlog_errno(status);
1150 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1151 wake_up(&osb->osb_mount_event);
1152 return status;
1153 }
1154 }
1155
1156 ocfs2_complete_quota_recovery(osb);
1157
1158 /* Now we wake up again for processes waiting for quotas */
1159 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1160 wake_up(&osb->osb_mount_event);
1161
1162 /* Start this when the mount is almost sure of being successful */
1163 ocfs2_orphan_scan_start(osb);
1164
1165 return status;
1166
1167 out_dismount:
1168 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1169 wake_up(&osb->osb_mount_event);
1170 ocfs2_free_replay_slots(osb);
1171 ocfs2_dismount_volume(sb, 1);
1172 goto out;
1173
1174 out_debugfs:
1175 debugfs_remove_recursive(osb->osb_debug_root);
1176 out_super:
1177 ocfs2_release_system_inodes(osb);
1178 kfree(osb->recovery_map);
1179 ocfs2_delete_osb(osb);
1180 kfree(osb);
1181 out:
1182 mlog_errno(status);
1183
1184 return status;
1185 }
1186
ocfs2_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1187 static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
1188 int flags,
1189 const char *dev_name,
1190 void *data)
1191 {
1192 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
1193 }
1194
1195 static struct file_system_type ocfs2_fs_type = {
1196 .owner = THIS_MODULE,
1197 .name = "ocfs2",
1198 .mount = ocfs2_mount,
1199 .kill_sb = kill_block_super,
1200 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1201 .next = NULL
1202 };
1203 MODULE_ALIAS_FS("ocfs2");
1204
ocfs2_check_set_options(struct super_block * sb,struct mount_options * options)1205 static int ocfs2_check_set_options(struct super_block *sb,
1206 struct mount_options *options)
1207 {
1208 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1209 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1210 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1211 mlog(ML_ERROR, "User quotas were requested, but this "
1212 "filesystem does not have the feature enabled.\n");
1213 return 0;
1214 }
1215 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1216 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1217 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1218 mlog(ML_ERROR, "Group quotas were requested, but this "
1219 "filesystem does not have the feature enabled.\n");
1220 return 0;
1221 }
1222 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1223 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1224 mlog(ML_ERROR, "ACL support requested but extended attributes "
1225 "feature is not enabled\n");
1226 return 0;
1227 }
1228 /* No ACL setting specified? Use XATTR feature... */
1229 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1230 OCFS2_MOUNT_NO_POSIX_ACL))) {
1231 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1232 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1233 else
1234 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1235 }
1236 return 1;
1237 }
1238
ocfs2_parse_options(struct super_block * sb,char * options,struct mount_options * mopt,int is_remount)1239 static int ocfs2_parse_options(struct super_block *sb,
1240 char *options,
1241 struct mount_options *mopt,
1242 int is_remount)
1243 {
1244 int status, user_stack = 0;
1245 char *p;
1246 u32 tmp;
1247 int token, option;
1248 substring_t args[MAX_OPT_ARGS];
1249
1250 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
1251
1252 mopt->commit_interval = 0;
1253 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
1254 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1255 mopt->slot = OCFS2_INVALID_SLOT;
1256 mopt->localalloc_opt = -1;
1257 mopt->cluster_stack[0] = '\0';
1258 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
1259 mopt->dir_resv_level = -1;
1260
1261 if (!options) {
1262 status = 1;
1263 goto bail;
1264 }
1265
1266 while ((p = strsep(&options, ",")) != NULL) {
1267 if (!*p)
1268 continue;
1269
1270 token = match_token(p, tokens, args);
1271 switch (token) {
1272 case Opt_hb_local:
1273 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1274 break;
1275 case Opt_hb_none:
1276 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1277 break;
1278 case Opt_hb_global:
1279 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
1280 break;
1281 case Opt_barrier:
1282 if (match_int(&args[0], &option)) {
1283 status = 0;
1284 goto bail;
1285 }
1286 if (option)
1287 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1288 else
1289 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1290 break;
1291 case Opt_intr:
1292 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1293 break;
1294 case Opt_nointr:
1295 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1296 break;
1297 case Opt_err_panic:
1298 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1299 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1300 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1301 break;
1302 case Opt_err_ro:
1303 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1304 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1305 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1306 break;
1307 case Opt_err_cont:
1308 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1309 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1310 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
1311 break;
1312 case Opt_data_ordered:
1313 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1314 break;
1315 case Opt_data_writeback:
1316 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1317 break;
1318 case Opt_user_xattr:
1319 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1320 break;
1321 case Opt_nouser_xattr:
1322 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1323 break;
1324 case Opt_atime_quantum:
1325 if (match_int(&args[0], &option)) {
1326 status = 0;
1327 goto bail;
1328 }
1329 if (option >= 0)
1330 mopt->atime_quantum = option;
1331 break;
1332 case Opt_slot:
1333 if (match_int(&args[0], &option)) {
1334 status = 0;
1335 goto bail;
1336 }
1337 if (option)
1338 mopt->slot = (u16)option;
1339 break;
1340 case Opt_commit:
1341 if (match_int(&args[0], &option)) {
1342 status = 0;
1343 goto bail;
1344 }
1345 if (option < 0)
1346 return 0;
1347 if (option == 0)
1348 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1349 mopt->commit_interval = HZ * option;
1350 break;
1351 case Opt_localalloc:
1352 if (match_int(&args[0], &option)) {
1353 status = 0;
1354 goto bail;
1355 }
1356 if (option >= 0)
1357 mopt->localalloc_opt = option;
1358 break;
1359 case Opt_localflocks:
1360 /*
1361 * Changing this during remount could race
1362 * flock() requests, or "unbalance" existing
1363 * ones (e.g., a lock is taken in one mode but
1364 * dropped in the other). If users care enough
1365 * to flip locking modes during remount, we
1366 * could add a "local" flag to individual
1367 * flock structures for proper tracking of
1368 * state.
1369 */
1370 if (!is_remount)
1371 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1372 break;
1373 case Opt_stack:
1374 /* Check both that the option we were passed
1375 * is of the right length and that it is a proper
1376 * string of the right length.
1377 */
1378 if (((args[0].to - args[0].from) !=
1379 OCFS2_STACK_LABEL_LEN) ||
1380 (strnlen(args[0].from,
1381 OCFS2_STACK_LABEL_LEN) !=
1382 OCFS2_STACK_LABEL_LEN)) {
1383 mlog(ML_ERROR,
1384 "Invalid cluster_stack option\n");
1385 status = 0;
1386 goto bail;
1387 }
1388 memcpy(mopt->cluster_stack, args[0].from,
1389 OCFS2_STACK_LABEL_LEN);
1390 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1391 /*
1392 * Open code the memcmp here as we don't have
1393 * an osb to pass to
1394 * ocfs2_userspace_stack().
1395 */
1396 if (memcmp(mopt->cluster_stack,
1397 OCFS2_CLASSIC_CLUSTER_STACK,
1398 OCFS2_STACK_LABEL_LEN))
1399 user_stack = 1;
1400 break;
1401 case Opt_inode64:
1402 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1403 break;
1404 case Opt_usrquota:
1405 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1406 break;
1407 case Opt_grpquota:
1408 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1409 break;
1410 case Opt_coherency_buffered:
1411 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1412 break;
1413 case Opt_coherency_full:
1414 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1415 break;
1416 case Opt_acl:
1417 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1418 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
1419 break;
1420 case Opt_noacl:
1421 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1422 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1423 break;
1424 case Opt_resv_level:
1425 if (is_remount)
1426 break;
1427 if (match_int(&args[0], &option)) {
1428 status = 0;
1429 goto bail;
1430 }
1431 if (option >= OCFS2_MIN_RESV_LEVEL &&
1432 option < OCFS2_MAX_RESV_LEVEL)
1433 mopt->resv_level = option;
1434 break;
1435 case Opt_dir_resv_level:
1436 if (is_remount)
1437 break;
1438 if (match_int(&args[0], &option)) {
1439 status = 0;
1440 goto bail;
1441 }
1442 if (option >= OCFS2_MIN_RESV_LEVEL &&
1443 option < OCFS2_MAX_RESV_LEVEL)
1444 mopt->dir_resv_level = option;
1445 break;
1446 case Opt_journal_async_commit:
1447 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1448 break;
1449 default:
1450 mlog(ML_ERROR,
1451 "Unrecognized mount option \"%s\" "
1452 "or missing value\n", p);
1453 status = 0;
1454 goto bail;
1455 }
1456 }
1457
1458 if (user_stack == 0) {
1459 /* Ensure only one heartbeat mode */
1460 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1461 OCFS2_MOUNT_HB_GLOBAL |
1462 OCFS2_MOUNT_HB_NONE);
1463 if (hweight32(tmp) != 1) {
1464 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1465 status = 0;
1466 goto bail;
1467 }
1468 }
1469
1470 status = 1;
1471
1472 bail:
1473 return status;
1474 }
1475
ocfs2_show_options(struct seq_file * s,struct dentry * root)1476 static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
1477 {
1478 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
1479 unsigned long opts = osb->s_mount_opt;
1480 unsigned int local_alloc_megs;
1481
1482 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1483 seq_printf(s, ",_netdev");
1484 if (opts & OCFS2_MOUNT_HB_LOCAL)
1485 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1486 else
1487 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1488 } else
1489 seq_printf(s, ",%s", OCFS2_HB_NONE);
1490
1491 if (opts & OCFS2_MOUNT_NOINTR)
1492 seq_printf(s, ",nointr");
1493
1494 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1495 seq_printf(s, ",data=writeback");
1496 else
1497 seq_printf(s, ",data=ordered");
1498
1499 if (opts & OCFS2_MOUNT_BARRIER)
1500 seq_printf(s, ",barrier=1");
1501
1502 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1503 seq_printf(s, ",errors=panic");
1504 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1505 seq_printf(s, ",errors=continue");
1506 else
1507 seq_printf(s, ",errors=remount-ro");
1508
1509 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1510 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1511
1512 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1513
1514 if (osb->osb_commit_interval)
1515 seq_printf(s, ",commit=%u",
1516 (unsigned) (osb->osb_commit_interval / HZ));
1517
1518 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1519 if (local_alloc_megs != ocfs2_la_default_mb(osb))
1520 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1521
1522 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1523 seq_printf(s, ",localflocks,");
1524
1525 if (osb->osb_cluster_stack[0])
1526 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1527 OCFS2_STACK_LABEL_LEN);
1528 if (opts & OCFS2_MOUNT_USRQUOTA)
1529 seq_printf(s, ",usrquota");
1530 if (opts & OCFS2_MOUNT_GRPQUOTA)
1531 seq_printf(s, ",grpquota");
1532
1533 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1534 seq_printf(s, ",coherency=buffered");
1535 else
1536 seq_printf(s, ",coherency=full");
1537
1538 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1539 seq_printf(s, ",nouser_xattr");
1540 else
1541 seq_printf(s, ",user_xattr");
1542
1543 if (opts & OCFS2_MOUNT_INODE64)
1544 seq_printf(s, ",inode64");
1545
1546 if (opts & OCFS2_MOUNT_POSIX_ACL)
1547 seq_printf(s, ",acl");
1548 else
1549 seq_printf(s, ",noacl");
1550
1551 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1552 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1553
1554 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1555 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1556
1557 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1558 seq_printf(s, ",journal_async_commit");
1559
1560 return 0;
1561 }
1562
ocfs2_init(void)1563 static int __init ocfs2_init(void)
1564 {
1565 int status;
1566
1567 status = init_ocfs2_uptodate_cache();
1568 if (status < 0)
1569 goto out1;
1570
1571 status = ocfs2_initialize_mem_caches();
1572 if (status < 0)
1573 goto out2;
1574
1575 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1576
1577 ocfs2_set_locking_protocol();
1578
1579 status = register_quota_format(&ocfs2_quota_format);
1580 if (status < 0)
1581 goto out3;
1582 status = register_filesystem(&ocfs2_fs_type);
1583 if (!status)
1584 return 0;
1585
1586 unregister_quota_format(&ocfs2_quota_format);
1587 out3:
1588 debugfs_remove(ocfs2_debugfs_root);
1589 ocfs2_free_mem_caches();
1590 out2:
1591 exit_ocfs2_uptodate_cache();
1592 out1:
1593 mlog_errno(status);
1594 return status;
1595 }
1596
ocfs2_exit(void)1597 static void __exit ocfs2_exit(void)
1598 {
1599 unregister_quota_format(&ocfs2_quota_format);
1600
1601 debugfs_remove(ocfs2_debugfs_root);
1602
1603 ocfs2_free_mem_caches();
1604
1605 unregister_filesystem(&ocfs2_fs_type);
1606
1607 exit_ocfs2_uptodate_cache();
1608 }
1609
ocfs2_put_super(struct super_block * sb)1610 static void ocfs2_put_super(struct super_block *sb)
1611 {
1612 trace_ocfs2_put_super(sb);
1613
1614 ocfs2_sync_blockdev(sb);
1615 ocfs2_dismount_volume(sb, 0);
1616 }
1617
ocfs2_statfs(struct dentry * dentry,struct kstatfs * buf)1618 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1619 {
1620 struct ocfs2_super *osb;
1621 u32 numbits, freebits;
1622 int status;
1623 struct ocfs2_dinode *bm_lock;
1624 struct buffer_head *bh = NULL;
1625 struct inode *inode = NULL;
1626
1627 trace_ocfs2_statfs(dentry->d_sb, buf);
1628
1629 osb = OCFS2_SB(dentry->d_sb);
1630
1631 inode = ocfs2_get_system_file_inode(osb,
1632 GLOBAL_BITMAP_SYSTEM_INODE,
1633 OCFS2_INVALID_SLOT);
1634 if (!inode) {
1635 mlog(ML_ERROR, "failed to get bitmap inode\n");
1636 status = -EIO;
1637 goto bail;
1638 }
1639
1640 status = ocfs2_inode_lock(inode, &bh, 0);
1641 if (status < 0) {
1642 mlog_errno(status);
1643 goto bail;
1644 }
1645
1646 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1647
1648 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1649 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1650
1651 buf->f_type = OCFS2_SUPER_MAGIC;
1652 buf->f_bsize = dentry->d_sb->s_blocksize;
1653 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1654 buf->f_blocks = ((sector_t) numbits) *
1655 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1656 buf->f_bfree = ((sector_t) freebits) *
1657 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1658 buf->f_bavail = buf->f_bfree;
1659 buf->f_files = numbits;
1660 buf->f_ffree = freebits;
1661 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1662 & 0xFFFFFFFFUL;
1663 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1664 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
1665
1666 brelse(bh);
1667
1668 ocfs2_inode_unlock(inode, 0);
1669 status = 0;
1670 bail:
1671 iput(inode);
1672
1673 if (status)
1674 mlog_errno(status);
1675
1676 return status;
1677 }
1678
ocfs2_inode_init_once(void * data)1679 static void ocfs2_inode_init_once(void *data)
1680 {
1681 struct ocfs2_inode_info *oi = data;
1682
1683 oi->ip_flags = 0;
1684 oi->ip_open_count = 0;
1685 spin_lock_init(&oi->ip_lock);
1686 ocfs2_extent_map_init(&oi->vfs_inode);
1687 INIT_LIST_HEAD(&oi->ip_io_markers);
1688 INIT_LIST_HEAD(&oi->ip_unwritten_list);
1689 oi->ip_dir_start_lookup = 0;
1690 init_rwsem(&oi->ip_alloc_sem);
1691 init_rwsem(&oi->ip_xattr_sem);
1692 mutex_init(&oi->ip_io_mutex);
1693
1694 oi->ip_blkno = 0ULL;
1695 oi->ip_clusters = 0;
1696 oi->ip_next_orphan = NULL;
1697
1698 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1699
1700 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1701 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1702 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1703
1704 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
1705 &ocfs2_inode_caching_ops);
1706
1707 inode_init_once(&oi->vfs_inode);
1708 }
1709
ocfs2_initialize_mem_caches(void)1710 static int ocfs2_initialize_mem_caches(void)
1711 {
1712 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1713 sizeof(struct ocfs2_inode_info),
1714 0,
1715 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1716 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1717 ocfs2_inode_init_once);
1718 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1719 sizeof(struct ocfs2_dquot),
1720 0,
1721 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1722 SLAB_MEM_SPREAD),
1723 NULL);
1724 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1725 sizeof(struct ocfs2_quota_chunk),
1726 0,
1727 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1728 NULL);
1729 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1730 !ocfs2_qf_chunk_cachep) {
1731 kmem_cache_destroy(ocfs2_inode_cachep);
1732 kmem_cache_destroy(ocfs2_dquot_cachep);
1733 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1734 return -ENOMEM;
1735 }
1736
1737 return 0;
1738 }
1739
ocfs2_free_mem_caches(void)1740 static void ocfs2_free_mem_caches(void)
1741 {
1742 /*
1743 * Make sure all delayed rcu free inodes are flushed before we
1744 * destroy cache.
1745 */
1746 rcu_barrier();
1747 kmem_cache_destroy(ocfs2_inode_cachep);
1748 ocfs2_inode_cachep = NULL;
1749
1750 kmem_cache_destroy(ocfs2_dquot_cachep);
1751 ocfs2_dquot_cachep = NULL;
1752
1753 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1754 ocfs2_qf_chunk_cachep = NULL;
1755 }
1756
ocfs2_get_sector(struct super_block * sb,struct buffer_head ** bh,int block,int sect_size)1757 static int ocfs2_get_sector(struct super_block *sb,
1758 struct buffer_head **bh,
1759 int block,
1760 int sect_size)
1761 {
1762 if (!sb_set_blocksize(sb, sect_size)) {
1763 mlog(ML_ERROR, "unable to set blocksize\n");
1764 return -EIO;
1765 }
1766
1767 *bh = sb_getblk(sb, block);
1768 if (!*bh) {
1769 mlog_errno(-ENOMEM);
1770 return -ENOMEM;
1771 }
1772 lock_buffer(*bh);
1773 if (!buffer_dirty(*bh))
1774 clear_buffer_uptodate(*bh);
1775 unlock_buffer(*bh);
1776 ll_rw_block(REQ_OP_READ, 0, 1, bh);
1777 wait_on_buffer(*bh);
1778 if (!buffer_uptodate(*bh)) {
1779 mlog_errno(-EIO);
1780 brelse(*bh);
1781 *bh = NULL;
1782 return -EIO;
1783 }
1784
1785 return 0;
1786 }
1787
ocfs2_mount_volume(struct super_block * sb)1788 static int ocfs2_mount_volume(struct super_block *sb)
1789 {
1790 int status = 0;
1791 struct ocfs2_super *osb = OCFS2_SB(sb);
1792
1793 if (ocfs2_is_hard_readonly(osb))
1794 goto out;
1795
1796 mutex_init(&osb->obs_trim_fs_mutex);
1797
1798 status = ocfs2_dlm_init(osb);
1799 if (status < 0) {
1800 mlog_errno(status);
1801 if (status == -EBADR && ocfs2_userspace_stack(osb))
1802 mlog(ML_ERROR, "couldn't mount because cluster name on"
1803 " disk does not match the running cluster name.\n");
1804 goto out;
1805 }
1806
1807 status = ocfs2_super_lock(osb, 1);
1808 if (status < 0) {
1809 mlog_errno(status);
1810 goto out_dlm;
1811 }
1812
1813 /* This will load up the node map and add ourselves to it. */
1814 status = ocfs2_find_slot(osb);
1815 if (status < 0) {
1816 mlog_errno(status);
1817 goto out_super_lock;
1818 }
1819
1820 /* load all node-local system inodes */
1821 status = ocfs2_init_local_system_inodes(osb);
1822 if (status < 0) {
1823 mlog_errno(status);
1824 goto out_super_lock;
1825 }
1826
1827 status = ocfs2_check_volume(osb);
1828 if (status < 0) {
1829 mlog_errno(status);
1830 goto out_system_inodes;
1831 }
1832
1833 status = ocfs2_truncate_log_init(osb);
1834 if (status < 0) {
1835 mlog_errno(status);
1836 goto out_check_volume;
1837 }
1838
1839 ocfs2_super_unlock(osb, 1);
1840 return 0;
1841
1842 out_check_volume:
1843 ocfs2_free_replay_slots(osb);
1844 out_system_inodes:
1845 if (osb->local_alloc_state == OCFS2_LA_ENABLED)
1846 ocfs2_shutdown_local_alloc(osb);
1847 ocfs2_release_system_inodes(osb);
1848 /* before journal shutdown, we should release slot_info */
1849 ocfs2_free_slot_info(osb);
1850 ocfs2_journal_shutdown(osb);
1851 out_super_lock:
1852 ocfs2_super_unlock(osb, 1);
1853 out_dlm:
1854 ocfs2_dlm_shutdown(osb, 0);
1855 out:
1856 return status;
1857 }
1858
ocfs2_dismount_volume(struct super_block * sb,int mnt_err)1859 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1860 {
1861 int tmp, hangup_needed = 0;
1862 struct ocfs2_super *osb = NULL;
1863 char nodestr[12];
1864
1865 trace_ocfs2_dismount_volume(sb);
1866
1867 BUG_ON(!sb);
1868 osb = OCFS2_SB(sb);
1869 BUG_ON(!osb);
1870
1871 /* Remove file check sysfs related directores/files,
1872 * and wait for the pending file check operations */
1873 ocfs2_filecheck_remove_sysfs(osb);
1874
1875 kset_unregister(osb->osb_dev_kset);
1876
1877 /* Orphan scan should be stopped as early as possible */
1878 ocfs2_orphan_scan_stop(osb);
1879
1880 ocfs2_disable_quotas(osb);
1881
1882 /* All dquots should be freed by now */
1883 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1884 /* Wait for worker to be done with the work structure in osb */
1885 cancel_work_sync(&osb->dquot_drop_work);
1886
1887 ocfs2_shutdown_local_alloc(osb);
1888
1889 ocfs2_truncate_log_shutdown(osb);
1890
1891 /* This will disable recovery and flush any recovery work. */
1892 ocfs2_recovery_exit(osb);
1893
1894 ocfs2_journal_shutdown(osb);
1895
1896 ocfs2_sync_blockdev(sb);
1897
1898 ocfs2_purge_refcount_trees(osb);
1899
1900 /* No cluster connection means we've failed during mount, so skip
1901 * all the steps which depended on that to complete. */
1902 if (osb->cconn) {
1903 tmp = ocfs2_super_lock(osb, 1);
1904 if (tmp < 0) {
1905 mlog_errno(tmp);
1906 return;
1907 }
1908 }
1909
1910 if (osb->slot_num != OCFS2_INVALID_SLOT)
1911 ocfs2_put_slot(osb);
1912
1913 if (osb->cconn)
1914 ocfs2_super_unlock(osb, 1);
1915
1916 ocfs2_release_system_inodes(osb);
1917
1918 /*
1919 * If we're dismounting due to mount error, mount.ocfs2 will clean
1920 * up heartbeat. If we're a local mount, there is no heartbeat.
1921 * If we failed before we got a uuid_str yet, we can't stop
1922 * heartbeat. Otherwise, do it.
1923 */
1924 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1925 !ocfs2_is_hard_readonly(osb))
1926 hangup_needed = 1;
1927
1928 ocfs2_dlm_shutdown(osb, hangup_needed);
1929
1930 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
1931 debugfs_remove_recursive(osb->osb_debug_root);
1932
1933 if (hangup_needed)
1934 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1935
1936 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1937
1938 if (ocfs2_mount_local(osb))
1939 snprintf(nodestr, sizeof(nodestr), "local");
1940 else
1941 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1942
1943 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1944 osb->dev_str, nodestr);
1945
1946 ocfs2_delete_osb(osb);
1947 kfree(osb);
1948 sb->s_dev = 0;
1949 sb->s_fs_info = NULL;
1950 }
1951
ocfs2_setup_osb_uuid(struct ocfs2_super * osb,const unsigned char * uuid,unsigned uuid_bytes)1952 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1953 unsigned uuid_bytes)
1954 {
1955 int i, ret;
1956 char *ptr;
1957
1958 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1959
1960 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1961 if (osb->uuid_str == NULL)
1962 return -ENOMEM;
1963
1964 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1965 /* print with null */
1966 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1967 if (ret != 2) /* drop super cleans up */
1968 return -EINVAL;
1969 /* then only advance past the last char */
1970 ptr += 2;
1971 }
1972
1973 return 0;
1974 }
1975
1976 /* Make sure entire volume is addressable by our journal. Requires
1977 osb_clusters_at_boot to be valid and for the journal to have been
1978 initialized by ocfs2_journal_init(). */
ocfs2_journal_addressable(struct ocfs2_super * osb)1979 static int ocfs2_journal_addressable(struct ocfs2_super *osb)
1980 {
1981 int status = 0;
1982 u64 max_block =
1983 ocfs2_clusters_to_blocks(osb->sb,
1984 osb->osb_clusters_at_boot) - 1;
1985
1986 /* 32-bit block number is always OK. */
1987 if (max_block <= (u32)~0ULL)
1988 goto out;
1989
1990 /* Volume is "huge", so see if our journal is new enough to
1991 support it. */
1992 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
1993 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
1994 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
1995 JBD2_FEATURE_INCOMPAT_64BIT))) {
1996 mlog(ML_ERROR, "The journal cannot address the entire volume. "
1997 "Enable the 'block64' journal option with tunefs.ocfs2");
1998 status = -EFBIG;
1999 goto out;
2000 }
2001
2002 out:
2003 return status;
2004 }
2005
ocfs2_initialize_super(struct super_block * sb,struct buffer_head * bh,int sector_size,struct ocfs2_blockcheck_stats * stats)2006 static int ocfs2_initialize_super(struct super_block *sb,
2007 struct buffer_head *bh,
2008 int sector_size,
2009 struct ocfs2_blockcheck_stats *stats)
2010 {
2011 int status;
2012 int i, cbits, bbits;
2013 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2014 struct inode *inode = NULL;
2015 struct ocfs2_journal *journal;
2016 struct ocfs2_super *osb;
2017 u64 total_blocks;
2018
2019 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
2020 if (!osb) {
2021 status = -ENOMEM;
2022 mlog_errno(status);
2023 goto bail;
2024 }
2025
2026 sb->s_fs_info = osb;
2027 sb->s_op = &ocfs2_sops;
2028 sb->s_d_op = &ocfs2_dentry_ops;
2029 sb->s_export_op = &ocfs2_export_ops;
2030 sb->s_qcop = &dquot_quotactl_sysfile_ops;
2031 sb->dq_op = &ocfs2_quota_operations;
2032 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
2033 sb->s_xattr = ocfs2_xattr_handlers;
2034 sb->s_time_gran = 1;
2035 sb->s_flags |= SB_NOATIME;
2036 /* this is needed to support O_LARGEFILE */
2037 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2038 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2039 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
2040 memcpy(&sb->s_uuid, di->id2.i_super.s_uuid,
2041 sizeof(di->id2.i_super.s_uuid));
2042
2043 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2044
2045 for (i = 0; i < 3; i++)
2046 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2047 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2048
2049 osb->sb = sb;
2050 osb->s_sectsize_bits = blksize_bits(sector_size);
2051 BUG_ON(!osb->s_sectsize_bits);
2052
2053 spin_lock_init(&osb->dc_task_lock);
2054 init_waitqueue_head(&osb->dc_event);
2055 osb->dc_work_sequence = 0;
2056 osb->dc_wake_sequence = 0;
2057 INIT_LIST_HEAD(&osb->blocked_lock_list);
2058 osb->blocked_lock_count = 0;
2059 spin_lock_init(&osb->osb_lock);
2060 spin_lock_init(&osb->osb_xattr_lock);
2061 ocfs2_init_steal_slots(osb);
2062
2063 mutex_init(&osb->system_file_mutex);
2064
2065 atomic_set(&osb->alloc_stats.moves, 0);
2066 atomic_set(&osb->alloc_stats.local_data, 0);
2067 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2068 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2069 atomic_set(&osb->alloc_stats.bg_extends, 0);
2070
2071 /* Copy the blockcheck stats from the superblock probe */
2072 osb->osb_ecc_stats = *stats;
2073
2074 ocfs2_init_node_maps(osb);
2075
2076 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2077 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2078
2079 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2080 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2081 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2082 osb->max_slots);
2083 status = -EINVAL;
2084 goto bail;
2085 }
2086
2087 ocfs2_orphan_scan_init(osb);
2088
2089 status = ocfs2_recovery_init(osb);
2090 if (status) {
2091 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2092 mlog_errno(status);
2093 goto bail;
2094 }
2095
2096 init_waitqueue_head(&osb->checkpoint_event);
2097
2098 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2099
2100 osb->slot_num = OCFS2_INVALID_SLOT;
2101
2102 osb->s_xattr_inline_size = le16_to_cpu(
2103 di->id2.i_super.s_xattr_inline_size);
2104
2105 osb->local_alloc_state = OCFS2_LA_UNUSED;
2106 osb->local_alloc_bh = NULL;
2107 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
2108
2109 init_waitqueue_head(&osb->osb_mount_event);
2110
2111 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2112 if (status) {
2113 mlog_errno(status);
2114 goto bail;
2115 }
2116
2117 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2118 if (!osb->vol_label) {
2119 mlog(ML_ERROR, "unable to alloc vol label\n");
2120 status = -ENOMEM;
2121 goto bail;
2122 }
2123
2124 osb->slot_recovery_generations =
2125 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2126 GFP_KERNEL);
2127 if (!osb->slot_recovery_generations) {
2128 status = -ENOMEM;
2129 mlog_errno(status);
2130 goto bail;
2131 }
2132
2133 init_waitqueue_head(&osb->osb_wipe_event);
2134 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2135 sizeof(*osb->osb_orphan_wipes),
2136 GFP_KERNEL);
2137 if (!osb->osb_orphan_wipes) {
2138 status = -ENOMEM;
2139 mlog_errno(status);
2140 goto bail;
2141 }
2142
2143 osb->osb_rf_lock_tree = RB_ROOT;
2144
2145 osb->s_feature_compat =
2146 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2147 osb->s_feature_ro_compat =
2148 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2149 osb->s_feature_incompat =
2150 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2151
2152 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2153 mlog(ML_ERROR, "couldn't mount because of unsupported "
2154 "optional features (%x).\n", i);
2155 status = -EINVAL;
2156 goto bail;
2157 }
2158 if (!sb_rdonly(osb->sb) && (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2159 mlog(ML_ERROR, "couldn't mount RDWR because of "
2160 "unsupported optional features (%x).\n", i);
2161 status = -EINVAL;
2162 goto bail;
2163 }
2164
2165 if (ocfs2_clusterinfo_valid(osb)) {
2166 /*
2167 * ci_stack and ci_cluster in ocfs2_cluster_info may not be null
2168 * terminated, so make sure no overflow happens here by using
2169 * memcpy. Destination strings will always be null terminated
2170 * because osb is allocated using kzalloc.
2171 */
2172 osb->osb_stackflags =
2173 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
2174 memcpy(osb->osb_cluster_stack,
2175 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2176 OCFS2_STACK_LABEL_LEN);
2177 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2178 mlog(ML_ERROR,
2179 "couldn't mount because of an invalid "
2180 "cluster stack label (%s) \n",
2181 osb->osb_cluster_stack);
2182 status = -EINVAL;
2183 goto bail;
2184 }
2185 memcpy(osb->osb_cluster_name,
2186 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2187 OCFS2_CLUSTER_NAME_LEN);
2188 } else {
2189 /* The empty string is identical with classic tools that
2190 * don't know about s_cluster_info. */
2191 osb->osb_cluster_stack[0] = '\0';
2192 }
2193
2194 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2195
2196 /* FIXME
2197 * This should be done in ocfs2_journal_init(), but unknown
2198 * ordering issues will cause the filesystem to crash.
2199 * If anyone wants to figure out what part of the code
2200 * refers to osb->journal before ocfs2_journal_init() is run,
2201 * be my guest.
2202 */
2203 /* initialize our journal structure */
2204
2205 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
2206 if (!journal) {
2207 mlog(ML_ERROR, "unable to alloc journal\n");
2208 status = -ENOMEM;
2209 goto bail;
2210 }
2211 osb->journal = journal;
2212 journal->j_osb = osb;
2213
2214 atomic_set(&journal->j_num_trans, 0);
2215 init_rwsem(&journal->j_trans_barrier);
2216 init_waitqueue_head(&journal->j_checkpointed);
2217 spin_lock_init(&journal->j_lock);
2218 journal->j_trans_id = (unsigned long) 1;
2219 INIT_LIST_HEAD(&journal->j_la_cleanups);
2220 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
2221 journal->j_state = OCFS2_JOURNAL_FREE;
2222
2223 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2224 init_llist_head(&osb->dquot_drop_list);
2225
2226 /* get some pseudo constants for clustersize bits */
2227 osb->s_clustersize_bits =
2228 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2229 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2230
2231 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2232 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2233 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2234 osb->s_clustersize);
2235 status = -EINVAL;
2236 goto bail;
2237 }
2238
2239 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2240 le32_to_cpu(di->i_clusters));
2241
2242 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2243 total_blocks);
2244 if (status) {
2245 mlog(ML_ERROR, "Volume too large "
2246 "to mount safely on this system");
2247 status = -EFBIG;
2248 goto bail;
2249 }
2250
2251 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2252 sizeof(di->id2.i_super.s_uuid))) {
2253 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2254 status = -ENOMEM;
2255 goto bail;
2256 }
2257
2258 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2259 OCFS2_MAX_VOL_LABEL_LEN);
2260 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2261 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2262 osb->first_cluster_group_blkno =
2263 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2264 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
2265 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2266 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2267 (unsigned long long)osb->root_blkno,
2268 (unsigned long long)osb->system_dir_blkno,
2269 osb->s_clustersize_bits);
2270
2271 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2272 if (!osb->osb_dlm_debug) {
2273 status = -ENOMEM;
2274 mlog_errno(status);
2275 goto bail;
2276 }
2277
2278 atomic_set(&osb->vol_state, VOLUME_INIT);
2279
2280 /* load root, system_dir, and all global system inodes */
2281 status = ocfs2_init_global_system_inodes(osb);
2282 if (status < 0) {
2283 mlog_errno(status);
2284 goto bail;
2285 }
2286
2287 /*
2288 * global bitmap
2289 */
2290 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2291 OCFS2_INVALID_SLOT);
2292 if (!inode) {
2293 status = -EINVAL;
2294 mlog_errno(status);
2295 goto bail;
2296 }
2297
2298 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
2299 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
2300 iput(inode);
2301
2302 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2303 osb->s_feature_incompat) * 8;
2304
2305 status = ocfs2_init_slot_info(osb);
2306 if (status < 0) {
2307 mlog_errno(status);
2308 goto bail;
2309 }
2310 cleancache_init_shared_fs(sb);
2311
2312 osb->ocfs2_wq = alloc_ordered_workqueue("ocfs2_wq", WQ_MEM_RECLAIM);
2313 if (!osb->ocfs2_wq) {
2314 status = -ENOMEM;
2315 mlog_errno(status);
2316 }
2317
2318 bail:
2319 return status;
2320 }
2321
2322 /*
2323 * will return: -EAGAIN if it is ok to keep searching for superblocks
2324 * -EINVAL if there is a bad superblock
2325 * 0 on success
2326 */
ocfs2_verify_volume(struct ocfs2_dinode * di,struct buffer_head * bh,u32 blksz,struct ocfs2_blockcheck_stats * stats)2327 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2328 struct buffer_head *bh,
2329 u32 blksz,
2330 struct ocfs2_blockcheck_stats *stats)
2331 {
2332 int status = -EAGAIN;
2333
2334 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2335 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
2336 /* We have to do a raw check of the feature here */
2337 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2338 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2339 status = ocfs2_block_check_validate(bh->b_data,
2340 bh->b_size,
2341 &di->i_check,
2342 stats);
2343 if (status)
2344 goto out;
2345 }
2346 status = -EINVAL;
2347 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2348 mlog(ML_ERROR, "found superblock with incorrect block "
2349 "size: found %u, should be %u\n",
2350 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2351 blksz);
2352 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2353 OCFS2_MAJOR_REV_LEVEL ||
2354 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2355 OCFS2_MINOR_REV_LEVEL) {
2356 mlog(ML_ERROR, "found superblock with bad version: "
2357 "found %u.%u, should be %u.%u\n",
2358 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2359 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2360 OCFS2_MAJOR_REV_LEVEL,
2361 OCFS2_MINOR_REV_LEVEL);
2362 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2363 mlog(ML_ERROR, "bad block number on superblock: "
2364 "found %llu, should be %llu\n",
2365 (unsigned long long)le64_to_cpu(di->i_blkno),
2366 (unsigned long long)bh->b_blocknr);
2367 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2368 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2369 mlog(ML_ERROR, "bad cluster size found: %u\n",
2370 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2371 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2372 mlog(ML_ERROR, "bad root_blkno: 0\n");
2373 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2374 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2375 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2376 mlog(ML_ERROR,
2377 "Superblock slots found greater than file system "
2378 "maximum: found %u, max %u\n",
2379 le16_to_cpu(di->id2.i_super.s_max_slots),
2380 OCFS2_MAX_SLOTS);
2381 } else {
2382 /* found it! */
2383 status = 0;
2384 }
2385 }
2386
2387 out:
2388 if (status && status != -EAGAIN)
2389 mlog_errno(status);
2390 return status;
2391 }
2392
ocfs2_check_volume(struct ocfs2_super * osb)2393 static int ocfs2_check_volume(struct ocfs2_super *osb)
2394 {
2395 int status;
2396 int dirty;
2397 int local;
2398 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2399 * recover
2400 * ourselves. */
2401
2402 /* Init our journal object. */
2403 status = ocfs2_journal_init(osb->journal, &dirty);
2404 if (status < 0) {
2405 mlog(ML_ERROR, "Could not initialize journal!\n");
2406 goto finally;
2407 }
2408
2409 /* Now that journal has been initialized, check to make sure
2410 entire volume is addressable. */
2411 status = ocfs2_journal_addressable(osb);
2412 if (status)
2413 goto finally;
2414
2415 /* If the journal was unmounted cleanly then we don't want to
2416 * recover anything. Otherwise, journal_load will do that
2417 * dirty work for us :) */
2418 if (!dirty) {
2419 status = ocfs2_journal_wipe(osb->journal, 0);
2420 if (status < 0) {
2421 mlog_errno(status);
2422 goto finally;
2423 }
2424 } else {
2425 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2426 "unmounted cleanly, recovering it.\n", osb->dev_str);
2427 }
2428
2429 local = ocfs2_mount_local(osb);
2430
2431 /* will play back anything left in the journal. */
2432 status = ocfs2_journal_load(osb->journal, local, dirty);
2433 if (status < 0) {
2434 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2435 goto finally;
2436 }
2437
2438 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2439 jbd2_journal_set_features(osb->journal->j_journal,
2440 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2441 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2442 else
2443 jbd2_journal_clear_features(osb->journal->j_journal,
2444 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2445 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2446
2447 if (dirty) {
2448 /* recover my local alloc if we didn't unmount cleanly. */
2449 status = ocfs2_begin_local_alloc_recovery(osb,
2450 osb->slot_num,
2451 &local_alloc);
2452 if (status < 0) {
2453 mlog_errno(status);
2454 goto finally;
2455 }
2456 /* we complete the recovery process after we've marked
2457 * ourselves as mounted. */
2458 }
2459
2460 status = ocfs2_load_local_alloc(osb);
2461 if (status < 0) {
2462 mlog_errno(status);
2463 goto finally;
2464 }
2465
2466 if (dirty) {
2467 /* Recovery will be completed after we've mounted the
2468 * rest of the volume. */
2469 osb->local_alloc_copy = local_alloc;
2470 local_alloc = NULL;
2471 }
2472
2473 /* go through each journal, trylock it and if you get the
2474 * lock, and it's marked as dirty, set the bit in the recover
2475 * map and launch a recovery thread for it. */
2476 status = ocfs2_mark_dead_nodes(osb);
2477 if (status < 0) {
2478 mlog_errno(status);
2479 goto finally;
2480 }
2481
2482 status = ocfs2_compute_replay_slots(osb);
2483 if (status < 0)
2484 mlog_errno(status);
2485
2486 finally:
2487 kfree(local_alloc);
2488
2489 if (status)
2490 mlog_errno(status);
2491 return status;
2492 }
2493
2494 /*
2495 * The routine gets called from dismount or close whenever a dismount on
2496 * volume is requested and the osb open count becomes 1.
2497 * It will remove the osb from the global list and also free up all the
2498 * initialized resources and fileobject.
2499 */
ocfs2_delete_osb(struct ocfs2_super * osb)2500 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2501 {
2502 /* This function assumes that the caller has the main osb resource */
2503
2504 /* ocfs2_initializer_super have already created this workqueue */
2505 if (osb->ocfs2_wq)
2506 destroy_workqueue(osb->ocfs2_wq);
2507
2508 ocfs2_free_slot_info(osb);
2509
2510 kfree(osb->osb_orphan_wipes);
2511 kfree(osb->slot_recovery_generations);
2512 /* FIXME
2513 * This belongs in journal shutdown, but because we have to
2514 * allocate osb->journal at the start of ocfs2_initialize_osb(),
2515 * we free it here.
2516 */
2517 kfree(osb->journal);
2518 kfree(osb->local_alloc_copy);
2519 kfree(osb->uuid_str);
2520 kfree(osb->vol_label);
2521 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2522 memset(osb, 0, sizeof(struct ocfs2_super));
2523 }
2524
2525 /* Depending on the mount option passed, perform one of the following:
2526 * Put OCFS2 into a readonly state (default)
2527 * Return EIO so that only the process errs
2528 * Fix the error as if fsck.ocfs2 -y
2529 * panic
2530 */
ocfs2_handle_error(struct super_block * sb)2531 static int ocfs2_handle_error(struct super_block *sb)
2532 {
2533 struct ocfs2_super *osb = OCFS2_SB(sb);
2534 int rv = 0;
2535
2536 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2537 pr_crit("On-disk corruption discovered. "
2538 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
2539
2540 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2541 panic("OCFS2: (device %s): panic forced after error\n",
2542 sb->s_id);
2543 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2544 pr_crit("OCFS2: Returning error to the calling process.\n");
2545 rv = -EIO;
2546 } else { /* default option */
2547 rv = -EROFS;
2548 if (sb_rdonly(sb) && (ocfs2_is_soft_readonly(osb) || ocfs2_is_hard_readonly(osb)))
2549 return rv;
2550
2551 pr_crit("OCFS2: File system is now read-only.\n");
2552 sb->s_flags |= SB_RDONLY;
2553 ocfs2_set_ro_flag(osb, 0);
2554 }
2555
2556 return rv;
2557 }
2558
__ocfs2_error(struct super_block * sb,const char * function,const char * fmt,...)2559 int __ocfs2_error(struct super_block *sb, const char *function,
2560 const char *fmt, ...)
2561 {
2562 struct va_format vaf;
2563 va_list args;
2564
2565 va_start(args, fmt);
2566 vaf.fmt = fmt;
2567 vaf.va = &args;
2568
2569 /* Not using mlog here because we want to show the actual
2570 * function the error came from. */
2571 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
2572 sb->s_id, function, &vaf);
2573
2574 va_end(args);
2575
2576 return ocfs2_handle_error(sb);
2577 }
2578
2579 /* Handle critical errors. This is intentionally more drastic than
2580 * ocfs2_handle_error, so we only use for things like journal errors,
2581 * etc. */
__ocfs2_abort(struct super_block * sb,const char * function,const char * fmt,...)2582 void __ocfs2_abort(struct super_block *sb, const char *function,
2583 const char *fmt, ...)
2584 {
2585 struct va_format vaf;
2586 va_list args;
2587
2588 va_start(args, fmt);
2589
2590 vaf.fmt = fmt;
2591 vaf.va = &args;
2592
2593 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
2594 sb->s_id, function, &vaf);
2595
2596 va_end(args);
2597
2598 /* We don't have the cluster support yet to go straight to
2599 * hard readonly in here. Until then, we want to keep
2600 * ocfs2_abort() so that we can at least mark critical
2601 * errors.
2602 *
2603 * TODO: This should abort the journal and alert other nodes
2604 * that our slot needs recovery. */
2605
2606 /* Force a panic(). This stinks, but it's better than letting
2607 * things continue without having a proper hard readonly
2608 * here. */
2609 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2610 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2611 ocfs2_handle_error(sb);
2612 }
2613
2614 /*
2615 * Void signal blockers, because in-kernel sigprocmask() only fails
2616 * when SIG_* is wrong.
2617 */
ocfs2_block_signals(sigset_t * oldset)2618 void ocfs2_block_signals(sigset_t *oldset)
2619 {
2620 int rc;
2621 sigset_t blocked;
2622
2623 sigfillset(&blocked);
2624 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2625 BUG_ON(rc);
2626 }
2627
ocfs2_unblock_signals(sigset_t * oldset)2628 void ocfs2_unblock_signals(sigset_t *oldset)
2629 {
2630 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2631 BUG_ON(rc);
2632 }
2633
2634 module_init(ocfs2_init);
2635 module_exit(ocfs2_exit);
2636