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