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