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ocfs2: sysfile interfaces for online file check
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CommitLineData
ccd979bd
MF		 1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26#include <linux/module.h>
27#include <linux/fs.h>
28#include <linux/types.h>
29#include <linux/slab.h>
30#include <linux/highmem.h>
ccd979bd
MF		 31#include <linux/init.h>
32#include <linux/random.h>
33#include <linux/statfs.h>
34#include <linux/moduleparam.h>
35#include <linux/blkdev.h>
36#include <linux/socket.h>
37#include <linux/inet.h>
38#include <linux/parser.h>
39#include <linux/crc32.h>
40#include <linux/debugfs.h>
d550071c 41#include <linux/mount.h>
6953b4c0 42#include <linux/seq_file.h>
19ece546 43#include <linux/quotaops.h>
1cfd8bd0 44#include <linux/cleancache.h>
ccd979bd 45
80a9a84d
WW		 46#define CREATE_TRACE_POINTS
47#include "ocfs2_trace.h"
48
ccd979bd
MF		 49#include <cluster/masklog.h>
50
51#include "ocfs2.h"
52
53/* this should be the only file to include a version 1 header */
54#include "ocfs1_fs_compat.h"
55
56#include "alloc.h"
a11f7e63 57#include "aops.h"
d030cc97 58#include "blockcheck.h"
ccd979bd
MF		 59#include "dlmglue.h"
60#include "export.h"
61#include "extent_map.h"
62#include "heartbeat.h"
63#include "inode.h"
64#include "journal.h"
65#include "localalloc.h"
66#include "namei.h"
67#include "slot_map.h"
68#include "super.h"
69#include "sysfile.h"
70#include "uptodate.h"
cf1d6c76 71#include "xattr.h"
9e33d69f 72#include "quota.h"
374a263e 73#include "refcounttree.h"
b89c5428 74#include "suballoc.h"
ccd979bd
MF		 75
76#include "buffer_head_io.h"
77
1a5c4e2a 78static struct kmem_cache *ocfs2_inode_cachep;
9e33d69f
JK		 79struct kmem_cache *ocfs2_dquot_cachep;
80struct kmem_cache *ocfs2_qf_chunk_cachep;
ccd979bd 81
25985edc 82/* OCFS2 needs to schedule several different types of work which
ccd979bd
MF		 83 * require cluster locking, disk I/O, recovery waits, etc. Since these
84 * types of work tend to be heavy we avoid using the kernel events
85 * workqueue and schedule on our own. */
86struct workqueue_struct *ocfs2_wq = NULL;
87
1a5c4e2a 88static struct dentry *ocfs2_debugfs_root;
ccd979bd
MF		 89
90MODULE_AUTHOR("Oracle");
91MODULE_LICENSE("GPL");
ff8fb335 92MODULE_DESCRIPTION("OCFS2 cluster file system");
ccd979bd 93
c0123ade
TY		 94struct mount_options
95{
d147b3d6 96 unsigned long commit_interval;
c0123ade
TY		 97 unsigned long mount_opt;
98 unsigned int atime_quantum;
99 signed short slot;
73c8a800 100 int localalloc_opt;
d02f00cc 101 unsigned int resv_level;
83f92318 102 int dir_resv_level;
b61817e1 103 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c0123ade
TY		 104};
105
ccd979bd 106static int ocfs2_parse_options(struct super_block *sb, char *options,
c0123ade 107 struct mount_options *mopt,
baf4661a 108 int is_remount);
5297aad8
JK		 109static int ocfs2_check_set_options(struct super_block *sb,
110 struct mount_options *options);
34c80b1d 111static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
ccd979bd
MF		 112static void ocfs2_put_super(struct super_block *sb);
113static int ocfs2_mount_volume(struct super_block *sb);
114static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
115static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
116static int ocfs2_initialize_mem_caches(void);
117static void ocfs2_free_mem_caches(void);
118static void ocfs2_delete_osb(struct ocfs2_super *osb);
119
726c3342 120static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
ccd979bd
MF		 121
122static int ocfs2_sync_fs(struct super_block *sb, int wait);
123
124static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
125static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
bddb8eb3 126static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
ccd979bd
MF		 127static int ocfs2_check_volume(struct ocfs2_super *osb);
128static int ocfs2_verify_volume(struct ocfs2_dinode *di,
129 struct buffer_head *bh,
73be192b
JB		 130 u32 sectsize,
131 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 132static int ocfs2_initialize_super(struct super_block *sb,
133 struct buffer_head *bh,
73be192b
JB		 134 int sector_size,
135 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 136static int ocfs2_get_sector(struct super_block *sb,
137 struct buffer_head **bh,
138 int block,
139 int sect_size);
ccd979bd
MF		 140static struct inode *ocfs2_alloc_inode(struct super_block *sb);
141static void ocfs2_destroy_inode(struct inode *inode);
19ece546
JK		 142static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
143static int ocfs2_enable_quotas(struct ocfs2_super *osb);
144static void ocfs2_disable_quotas(struct ocfs2_super *osb);
ccd979bd 145
1c92ec67
JK		 146static struct dquot **ocfs2_get_dquots(struct inode *inode)
147{
148 return OCFS2_I(inode)->i_dquot;
149}
150
ee9b6d61 151static const struct super_operations ocfs2_sops = {
ccd979bd
MF		 152 .statfs = ocfs2_statfs,
153 .alloc_inode = ocfs2_alloc_inode,
154 .destroy_inode = ocfs2_destroy_inode,
155 .drop_inode = ocfs2_drop_inode,
066d92dc 156 .evict_inode = ocfs2_evict_inode,
ccd979bd 157 .sync_fs = ocfs2_sync_fs,
ccd979bd
MF		 158 .put_super = ocfs2_put_super,
159 .remount_fs = ocfs2_remount,
d550071c 160 .show_options = ocfs2_show_options,
9e33d69f
JK		 161 .quota_read = ocfs2_quota_read,
162 .quota_write = ocfs2_quota_write,
1c92ec67 163 .get_dquots = ocfs2_get_dquots,
ccd979bd
MF		 164};
165
166enum {
167 Opt_barrier,
168 Opt_err_panic,
169 Opt_err_ro,
170 Opt_intr,
171 Opt_nointr,
172 Opt_hb_none,
173 Opt_hb_local,
2c442719 174 Opt_hb_global,
ccd979bd
MF		 175 Opt_data_ordered,
176 Opt_data_writeback,
7f1a37e3 177 Opt_atime_quantum,
baf4661a 178 Opt_slot,
d147b3d6 179 Opt_commit,
2fbe8d1e 180 Opt_localalloc,
53fc622b 181 Opt_localflocks,
b61817e1 182 Opt_stack,
cf1d6c76
TY		 183 Opt_user_xattr,
184 Opt_nouser_xattr,
12462f1d 185 Opt_inode64,
a68979b8
TY		 186 Opt_acl,
187 Opt_noacl,
19ece546
JK		 188 Opt_usrquota,
189 Opt_grpquota,
7bdb0d18
TY		 190 Opt_coherency_buffered,
191 Opt_coherency_full,
d02f00cc 192 Opt_resv_level,
83f92318 193 Opt_dir_resv_level,
1dfeb768 194 Opt_journal_async_commit,
7d0fb914 195 Opt_err_cont,
ccd979bd
MF		 196 Opt_err,
197};
198
a447c093 199static const match_table_t tokens = {
ccd979bd
MF		 200 {Opt_barrier, "barrier=%u"},
201 {Opt_err_panic, "errors=panic"},
202 {Opt_err_ro, "errors=remount-ro"},
203 {Opt_intr, "intr"},
204 {Opt_nointr, "nointr"},
205 {Opt_hb_none, OCFS2_HB_NONE},
206 {Opt_hb_local, OCFS2_HB_LOCAL},
2c442719 207 {Opt_hb_global, OCFS2_HB_GLOBAL},
ccd979bd
MF		 208 {Opt_data_ordered, "data=ordered"},
209 {Opt_data_writeback, "data=writeback"},
7f1a37e3 210 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 211 {Opt_slot, "preferred_slot=%u"},
d147b3d6 212 {Opt_commit, "commit=%u"},
2fbe8d1e 213 {Opt_localalloc, "localalloc=%d"},
53fc622b 214 {Opt_localflocks, "localflocks"},
b61817e1 215 {Opt_stack, "cluster_stack=%s"},
cf1d6c76
TY		 216 {Opt_user_xattr, "user_xattr"},
217 {Opt_nouser_xattr, "nouser_xattr"},
12462f1d 218 {Opt_inode64, "inode64"},
a68979b8
TY		 219 {Opt_acl, "acl"},
220 {Opt_noacl, "noacl"},
19ece546
JK		 221 {Opt_usrquota, "usrquota"},
222 {Opt_grpquota, "grpquota"},
7bdb0d18
TY		 223 {Opt_coherency_buffered, "coherency=buffered"},
224 {Opt_coherency_full, "coherency=full"},
d02f00cc 225 {Opt_resv_level, "resv_level=%u"},
83f92318 226 {Opt_dir_resv_level, "dir_resv_level=%u"},
1dfeb768 227 {Opt_journal_async_commit, "journal_async_commit"},
7d0fb914 228 {Opt_err_cont, "errors=continue"},
ccd979bd
MF		 229 {Opt_err, NULL}
230};
231
50397507
SM		 232#ifdef CONFIG_DEBUG_FS
233static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
234{
50397507
SM		 235 struct ocfs2_cluster_connection *cconn = osb->cconn;
236 struct ocfs2_recovery_map *rm = osb->recovery_map;
df152c24
SM		 237 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
238 int i, out = 0;
bfd97a03 239 unsigned long flags;
50397507
SM		 240
241 out += snprintf(buf + out, len - out,
242 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
243 "Device", osb->dev_str, osb->uuid_str,
244 osb->fs_generation, osb->vol_label);
245
246 out += snprintf(buf + out, len - out,
247 "%10s => State: %d Flags: 0x%lX\n", "Volume",
248 atomic_read(&osb->vol_state), osb->osb_flags);
249
250 out += snprintf(buf + out, len - out,
251 "%10s => Block: %lu Cluster: %d\n", "Sizes",
252 osb->sb->s_blocksize, osb->s_clustersize);
253
254 out += snprintf(buf + out, len - out,
255 "%10s => Compat: 0x%X Incompat: 0x%X "
256 "ROcompat: 0x%X\n",
257 "Features", osb->s_feature_compat,
258 osb->s_feature_incompat, osb->s_feature_ro_compat);
259
260 out += snprintf(buf + out, len - out,
261 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
262 osb->s_mount_opt, osb->s_atime_quantum);
263
c3d38840
SM		 264 if (cconn) {
265 out += snprintf(buf + out, len - out,
266 "%10s => Stack: %s Name: %*s "
267 "Version: %d.%d\n", "Cluster",
268 (*osb->osb_cluster_stack == '\0' ?
269 "o2cb" : osb->osb_cluster_stack),
270 cconn->cc_namelen, cconn->cc_name,
271 cconn->cc_version.pv_major,
272 cconn->cc_version.pv_minor);
273 }
50397507 274
bfd97a03 275 spin_lock_irqsave(&osb->dc_task_lock, flags);
50397507
SM		 276 out += snprintf(buf + out, len - out,
277 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
278 "WorkSeq: %lu\n", "DownCnvt",
c3d38840
SM		 279 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
280 osb->blocked_lock_count, osb->dc_wake_sequence,
281 osb->dc_work_sequence);
bfd97a03 282 spin_unlock_irqrestore(&osb->dc_task_lock, flags);
50397507
SM		 283
284 spin_lock(&osb->osb_lock);
285 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
286 "Recovery",
287 (osb->recovery_thread_task ?
288 task_pid_nr(osb->recovery_thread_task) : -1));
289 if (rm->rm_used == 0)
290 out += snprintf(buf + out, len - out, " None\n");
291 else {
292 for (i = 0; i < rm->rm_used; i++)
293 out += snprintf(buf + out, len - out, " %d",
294 rm->rm_entries[i]);
295 out += snprintf(buf + out, len - out, "\n");
296 }
297 spin_unlock(&osb->osb_lock);
298
299 out += snprintf(buf + out, len - out,
8fa9d17f 300 "%10s => Pid: %d Interval: %lu\n", "Commit",
c3d38840 301 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
8fa9d17f 302 osb->osb_commit_interval);
50397507
SM		 303
304 out += snprintf(buf + out, len - out,
c3d38840 305 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
50397507 306 "Journal", osb->journal->j_state,
c3d38840
SM		 307 osb->journal->j_trans_id,
308 atomic_read(&osb->journal->j_num_trans));
50397507
SM		 309
310 out += snprintf(buf + out, len - out,
311 "%10s => GlobalAllocs: %d LocalAllocs: %d "
312 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
313 "Stats",
314 atomic_read(&osb->alloc_stats.bitmap_data),
315 atomic_read(&osb->alloc_stats.local_data),
316 atomic_read(&osb->alloc_stats.bg_allocs),
317 atomic_read(&osb->alloc_stats.moves),
318 atomic_read(&osb->alloc_stats.bg_extends));
319
320 out += snprintf(buf + out, len - out,
321 "%10s => State: %u Descriptor: %llu Size: %u bits "
322 "Default: %u bits\n",
323 "LocalAlloc", osb->local_alloc_state,
324 (unsigned long long)osb->la_last_gd,
325 osb->local_alloc_bits, osb->local_alloc_default_bits);
326
327 spin_lock(&osb->osb_lock);
328 out += snprintf(buf + out, len - out,
b89c5428
TY		 329 "%10s => InodeSlot: %d StolenInodes: %d, "
330 "MetaSlot: %d StolenMeta: %d\n", "Steal",
50397507 331 osb->s_inode_steal_slot,
b89c5428
TY		 332 atomic_read(&osb->s_num_inodes_stolen),
333 osb->s_meta_steal_slot,
334 atomic_read(&osb->s_num_meta_stolen));
50397507
SM		 335 spin_unlock(&osb->osb_lock);
336
df152c24
SM		 337 out += snprintf(buf + out, len - out, "OrphanScan => ");
338 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
339 os->os_count, os->os_seqno);
340 out += snprintf(buf + out, len - out, " Last Scan: ");
341 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
342 out += snprintf(buf + out, len - out, "Disabled\n");
343 else
344 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
345 (get_seconds() - os->os_scantime.tv_sec));
346
50397507
SM		 347 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
348 "Slots", "Num", "RecoGen");
50397507
SM		 349 for (i = 0; i < osb->max_slots; ++i) {
350 out += snprintf(buf + out, len - out,
351 "%10s %c %3d %10d\n",
352 " ",
353 (i == osb->slot_num ? '*' : ' '),
354 i, osb->slot_recovery_generations[i]);
355 }
356
357 return out;
358}
359
360static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
361{
362 struct ocfs2_super *osb = inode->i_private;
363 char *buf = NULL;
364
365 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
366 if (!buf)
367 goto bail;
368
369 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
370
371 file->private_data = buf;
372
373 return 0;
374bail:
375 return -ENOMEM;
376}
377
378static int ocfs2_debug_release(struct inode *inode, struct file *file)
379{
380 kfree(file->private_data);
381 return 0;
382}
383
384static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
385 size_t nbytes, loff_t *ppos)
386{
387 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
388 i_size_read(file->f_mapping->host));
389}
390#else
391static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
392{
393 return 0;
394}
395static int ocfs2_debug_release(struct inode *inode, struct file *file)
396{
397 return 0;
398}
399static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
400 size_t nbytes, loff_t *ppos)
401{
402 return 0;
403}
404#endif /* CONFIG_DEBUG_FS */
405
828c0950 406static const struct file_operations ocfs2_osb_debug_fops = {
50397507
SM		 407 .open = ocfs2_osb_debug_open,
408 .release = ocfs2_debug_release,
409 .read = ocfs2_debug_read,
410 .llseek = generic_file_llseek,
411};
412
ccd979bd
MF		 413static int ocfs2_sync_fs(struct super_block *sb, int wait)
414{
bddb8eb3 415 int status;
ccd979bd
MF		 416 tid_t target;
417 struct ocfs2_super *osb = OCFS2_SB(sb);
418
ccd979bd
MF		 419 if (ocfs2_is_hard_readonly(osb))
420 return -EROFS;
421
422 if (wait) {
423 status = ocfs2_flush_truncate_log(osb);
424 if (status < 0)
425 mlog_errno(status);
426 } else {
427 ocfs2_schedule_truncate_log_flush(osb, 0);
428 }
429
2b4e30fb
JB		 430 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
431 &target)) {
ccd979bd 432 if (wait)
2b4e30fb
JB		 433 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
434 target);
ccd979bd
MF		 435 }
436 return 0;
437}
438
1a224ad1
JK		 439static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
440{
441 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
442 && (ino == USER_QUOTA_SYSTEM_INODE
443 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
444 return 0;
445 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
446 && (ino == GROUP_QUOTA_SYSTEM_INODE
447 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
448 return 0;
449 return 1;
450}
451
ccd979bd
MF		 452static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
453{
454 struct inode *new = NULL;
455 int status = 0;
456 int i;
457
5fa0613e 458 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 459 if (IS_ERR(new)) {
460 status = PTR_ERR(new);
461 mlog_errno(status);
462 goto bail;
463 }
464 osb->root_inode = new;
465
5fa0613e 466 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 467 if (IS_ERR(new)) {
468 status = PTR_ERR(new);
469 mlog_errno(status);
470 goto bail;
471 }
472 osb->sys_root_inode = new;
473
474 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
475 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
1a224ad1
JK		 476 if (!ocfs2_need_system_inode(osb, i))
477 continue;
ccd979bd
MF		 478 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
479 if (!new) {
480 ocfs2_release_system_inodes(osb);
481 status = -EINVAL;
482 mlog_errno(status);
483 /* FIXME: Should ERROR_RO_FS */
484 mlog(ML_ERROR, "Unable to load system inode %d, "
485 "possibly corrupt fs?", i);
486 goto bail;
487 }
488 // the array now has one ref, so drop this one
489 iput(new);
490 }
491
492bail:
c1e8d35e
TM		 493 if (status)
494 mlog_errno(status);
ccd979bd
MF		 495 return status;
496}
497
498static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
499{
500 struct inode *new = NULL;
501 int status = 0;
502 int i;
503
ccd979bd
MF		 504 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
505 i < NUM_SYSTEM_INODES;
506 i++) {
1a224ad1
JK		 507 if (!ocfs2_need_system_inode(osb, i))
508 continue;
ccd979bd
MF		 509 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
510 if (!new) {
511 ocfs2_release_system_inodes(osb);
512 status = -EINVAL;
513 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
514 status, i, osb->slot_num);
515 goto bail;
516 }
517 /* the array now has one ref, so drop this one */
518 iput(new);
519 }
520
521bail:
c1e8d35e
TM		 522 if (status)
523 mlog_errno(status);
ccd979bd
MF		 524 return status;
525}
526
bddb8eb3 527static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
ccd979bd 528{
bddb8eb3 529 int i;
ccd979bd
MF		 530 struct inode *inode;
531
b4d693fc
TM		 532 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
533 inode = osb->global_system_inodes[i];
ccd979bd
MF		 534 if (inode) {
535 iput(inode);
b4d693fc 536 osb->global_system_inodes[i] = NULL;
ccd979bd
MF		 537 }
538 }
539
540 inode = osb->sys_root_inode;
541 if (inode) {
542 iput(inode);
543 osb->sys_root_inode = NULL;
544 }
545
546 inode = osb->root_inode;
547 if (inode) {
548 iput(inode);
549 osb->root_inode = NULL;
550 }
551
b4d693fc 552 if (!osb->local_system_inodes)
c1e8d35e 553 return;
b4d693fc
TM		 554
555 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
556 if (osb->local_system_inodes[i]) {
557 iput(osb->local_system_inodes[i]);
558 osb->local_system_inodes[i] = NULL;
559 }
560 }
561
562 kfree(osb->local_system_inodes);
563 osb->local_system_inodes = NULL;
ccd979bd
MF		 564}
565
566/* We're allocating fs objects, use GFP_NOFS */
567static struct inode *ocfs2_alloc_inode(struct super_block *sb)
568{
569 struct ocfs2_inode_info *oi;
570
e6b4f8da 571 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 572 if (!oi)
573 return NULL;
574
2931cdcb
DW		 575 oi->i_sync_tid = 0;
576 oi->i_datasync_tid = 0;
1c92ec67 577 memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
2931cdcb 578
2b4e30fb 579 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
ccd979bd
MF		 580 return &oi->vfs_inode;
581}
582
fa0d7e3d 583static void ocfs2_i_callback(struct rcu_head *head)
ccd979bd 584{
fa0d7e3d 585 struct inode *inode = container_of(head, struct inode, i_rcu);
ccd979bd
MF		 586 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
587}
588
fa0d7e3d
NP		 589static void ocfs2_destroy_inode(struct inode *inode)
590{
591 call_rcu(&inode->i_rcu, ocfs2_i_callback);
592}
593
5a254031
MF		 594static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
595 unsigned int cbits)
ccd979bd 596{
5a254031
MF		 597 unsigned int bytes = 1 << cbits;
598 unsigned int trim = bytes;
599 unsigned int bitshift = 32;
600
601 /*
602 * i_size and all block offsets in ocfs2 are always 64 bits
603 * wide. i_clusters is 32 bits, in cluster-sized units. So on
604 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 605 */
606
607#if BITS_PER_LONG == 32
90c699a9 608# if defined(CONFIG_LBDAF)
2ecd05ae 609 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 610 /*
611 * We might be limited by page cache size.
612 */
613 if (bytes > PAGE_CACHE_SIZE) {
614 bytes = PAGE_CACHE_SIZE;
615 trim = 1;
616 /*
617 * Shift by 31 here so that we don't get larger than
618 * MAX_LFS_FILESIZE
619 */
620 bitshift = 31;
621 }
ccd979bd 622# else
5a254031
MF		 623 /*
624 * We are limited by the size of sector_t. Use block size, as
625 * that's what we expose to the VFS.
626 */
627 bytes = 1 << bbits;
628 trim = 1;
629 bitshift = 31;
ccd979bd
MF		 630# endif
631#endif
632
5a254031
MF		 633 /*
634 * Trim by a whole cluster when we can actually approach the
635 * on-disk limits. Otherwise we can overflow i_clusters when
636 * an extent start is at the max offset.
637 */
638 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 639}
640
641static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
642{
643 int incompat_features;
644 int ret = 0;
c0123ade 645 struct mount_options parsed_options;
ccd979bd 646 struct ocfs2_super *osb = OCFS2_SB(sb);
2c442719 647 u32 tmp;
ccd979bd 648
02b9984d
TT		 649 sync_filesystem(sb);
650
5297aad8
JK		 651 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
652 !ocfs2_check_set_options(sb, &parsed_options)) {
ccd979bd
MF		 653 ret = -EINVAL;
654 goto out;
655 }
656
2c442719
SM		 657 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
658 OCFS2_MOUNT_HB_NONE;
659 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
ccd979bd
MF		 660 ret = -EINVAL;
661 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
662 goto out;
663 }
664
665 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 666 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 667 ret = -EINVAL;
668 mlog(ML_ERROR, "Cannot change data mode on remount\n");
669 goto out;
670 }
671
12462f1d
JB		 672 /* Probably don't want this on remount; it might
673 * mess with other nodes */
674 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
675 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
676 ret = -EINVAL;
677 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
678 goto out;
679 }
680
ccd979bd
MF		 681 /* We're going to/from readonly mode. */
682 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
19ece546
JK		 683 /* Disable quota accounting before remounting RO */
684 if (*flags & MS_RDONLY) {
685 ret = ocfs2_susp_quotas(osb, 0);
686 if (ret < 0)
687 goto out;
688 }
ccd979bd
MF		 689 /* Lock here so the check of HARD_RO and the potential
690 * setting of SOFT_RO is atomic. */
691 spin_lock(&osb->osb_lock);
692 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
693 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
694 ret = -EROFS;
695 goto unlock_osb;
696 }
697
698 if (*flags & MS_RDONLY) {
ccd979bd
MF		 699 sb->s_flags |= MS_RDONLY;
700 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
701 } else {
ccd979bd
MF		 702 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
703 mlog(ML_ERROR, "Cannot remount RDWR "
704 "filesystem due to previous errors.\n");
705 ret = -EROFS;
706 goto unlock_osb;
707 }
708 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
709 if (incompat_features) {
710 mlog(ML_ERROR, "Cannot remount RDWR because "
711 "of unsupported optional features "
712 "(%x).\n", incompat_features);
713 ret = -EINVAL;
714 goto unlock_osb;
715 }
716 sb->s_flags &= ~MS_RDONLY;
717 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
718 }
32a42d39 719 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
ccd979bd
MF		 720unlock_osb:
721 spin_unlock(&osb->osb_lock);
19ece546
JK		 722 /* Enable quota accounting after remounting RW */
723 if (!ret && !(*flags & MS_RDONLY)) {
724 if (sb_any_quota_suspended(sb))
725 ret = ocfs2_susp_quotas(osb, 1);
726 else
727 ret = ocfs2_enable_quotas(osb);
728 if (ret < 0) {
729 /* Return back changes... */
730 spin_lock(&osb->osb_lock);
731 sb->s_flags |= MS_RDONLY;
732 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
733 spin_unlock(&osb->osb_lock);
734 goto out;
735 }
736 }
ccd979bd
MF		 737 }
738
739 if (!ret) {
ccd979bd
MF		 740 /* Only save off the new mount options in case of a successful
741 * remount. */
c0123ade
TY		 742 osb->s_mount_opt = parsed_options.mount_opt;
743 osb->s_atime_quantum = parsed_options.atime_quantum;
744 osb->preferred_slot = parsed_options.slot;
d147b3d6
MF		 745 if (parsed_options.commit_interval)
746 osb->osb_commit_interval = parsed_options.commit_interval;
e001e796
MF		 747
748 if (!ocfs2_is_hard_readonly(osb))
749 ocfs2_set_journal_params(osb);
57b09bb5
JK		 750
751 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
752 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
753 MS_POSIXACL : 0);
ccd979bd
MF		 754 }
755out:
756 return ret;
757}
758
759static int ocfs2_sb_probe(struct super_block *sb,
760 struct buffer_head **bh,
73be192b
JB		 761 int *sector_size,
762 struct ocfs2_blockcheck_stats *stats)
ccd979bd 763{
bddb8eb3 764 int status, tmpstat;
ccd979bd
MF		 765 struct ocfs1_vol_disk_hdr *hdr;
766 struct ocfs2_dinode *di;
767 int blksize;
768
769 *bh = NULL;
770
771 /* may be > 512 */
e1defc4f 772 *sector_size = bdev_logical_block_size(sb->s_bdev);
ccd979bd
MF		 773 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
774 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
775 *sector_size, OCFS2_MAX_BLOCKSIZE);
776 status = -EINVAL;
777 goto bail;
778 }
779
780 /* Can this really happen? */
781 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
782 *sector_size = OCFS2_MIN_BLOCKSIZE;
783
784 /* check block zero for old format */
785 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
786 if (status < 0) {
787 mlog_errno(status);
788 goto bail;
789 }
790 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
791 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
792 mlog(ML_ERROR, "incompatible version: %u.%u\n",
793 hdr->major_version, hdr->minor_version);
794 status = -EINVAL;
795 }
796 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
797 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
798 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
799 hdr->signature);
800 status = -EINVAL;
801 }
802 brelse(*bh);
803 *bh = NULL;
804 if (status < 0) {
805 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
806 "upgraded before mounting with ocfs v2\n");
807 goto bail;
808 }
809
810 /*
811 * Now check at magic offset for 512, 1024, 2048, 4096
812 * blocksizes. 4096 is the maximum blocksize because it is
813 * the minimum clustersize.
814 */
815 status = -EINVAL;
816 for (blksize = *sector_size;
817 blksize <= OCFS2_MAX_BLOCKSIZE;
818 blksize <<= 1) {
819 tmpstat = ocfs2_get_sector(sb, bh,
820 OCFS2_SUPER_BLOCK_BLKNO,
821 blksize);
822 if (tmpstat < 0) {
823 status = tmpstat;
824 mlog_errno(status);
fb5cbe9e 825 break;
ccd979bd
MF		 826 }
827 di = (struct ocfs2_dinode *) (*bh)->b_data;
73be192b 828 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
1c1d9793 829 spin_lock_init(&stats->b_lock);
fb5cbe9e
JB		 830 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
831 if (tmpstat < 0) {
832 brelse(*bh);
833 *bh = NULL;
834 }
835 if (tmpstat != -EAGAIN) {
836 status = tmpstat;
ccd979bd 837 break;
fb5cbe9e 838 }
ccd979bd
MF		 839 }
840
841bail:
842 return status;
843}
844
c271c5c2
SM		 845static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
846{
2c442719
SM		 847 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
848
849 if (osb->s_mount_opt & hb_enabled) {
850 if (ocfs2_mount_local(osb)) {
c271c5c2
SM		 851 mlog(ML_ERROR, "Cannot heartbeat on a locally "
852 "mounted device.\n");
853 return -EINVAL;
854 }
2c442719 855 if (ocfs2_userspace_stack(osb)) {
b61817e1
JB		 856 mlog(ML_ERROR, "Userspace stack expected, but "
857 "o2cb heartbeat arguments passed to mount\n");
858 return -EINVAL;
859 }
2c442719
SM		 860 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
861 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
862 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
863 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
864 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
865 return -EINVAL;
866 }
b61817e1
JB		 867 }
868
2c442719 869 if (!(osb->s_mount_opt & hb_enabled)) {
b61817e1
JB		 870 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
871 !ocfs2_userspace_stack(osb)) {
c271c5c2
SM		 872 mlog(ML_ERROR, "Heartbeat has to be started to mount "
873 "a read-write clustered device.\n");
874 return -EINVAL;
875 }
876 }
877
878 return 0;
879}
880
b61817e1
JB		 881/*
882 * If we're using a userspace stack, mount should have passed
883 * a name that matches the disk. If not, mount should not
884 * have passed a stack.
885 */
886static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
887 struct mount_options *mopt)
888{
889 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
890 mlog(ML_ERROR,
891 "cluster stack passed to mount, but this filesystem "
892 "does not support it\n");
893 return -EINVAL;
894 }
895
896 if (ocfs2_userspace_stack(osb) &&
897 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
898 OCFS2_STACK_LABEL_LEN)) {
899 mlog(ML_ERROR,
900 "cluster stack passed to mount (\"%s\") does not "
901 "match the filesystem (\"%s\")\n",
902 mopt->cluster_stack,
903 osb->osb_cluster_stack);
904 return -EINVAL;
905 }
906
907 return 0;
908}
909
19ece546
JK		 910static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
911{
912 int type;
913 struct super_block *sb = osb->sb;
52362810
JK		 914 unsigned int feature[OCFS2_MAXQUOTAS] = {
915 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
916 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
19ece546
JK		 917 int status = 0;
918
52362810 919 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
19ece546
JK		 920 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
921 continue;
922 if (unsuspend)
0f0dd62f 923 status = dquot_resume(sb, type);
eea7feb0
JK		 924 else {
925 struct ocfs2_mem_dqinfo *oinfo;
926
927 /* Cancel periodic syncing before suspending */
928 oinfo = sb_dqinfo(sb, type)->dqi_priv;
929 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
0f0dd62f 930 status = dquot_suspend(sb, type);
eea7feb0 931 }
19ece546
JK		 932 if (status < 0)
933 break;
934 }
935 if (status < 0)
936 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
937 "remount (error = %d).\n", status);
938 return status;
939}
940
941static int ocfs2_enable_quotas(struct ocfs2_super *osb)
942{
52362810 943 struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
19ece546 944 struct super_block *sb = osb->sb;
52362810
JK		 945 unsigned int feature[OCFS2_MAXQUOTAS] = {
946 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
947 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
948 unsigned int ino[OCFS2_MAXQUOTAS] = {
949 LOCAL_USER_QUOTA_SYSTEM_INODE,
19ece546
JK		 950 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
951 int status;
952 int type;
953
954 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
52362810 955 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
19ece546
JK		 956 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
957 continue;
958 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
959 osb->slot_num);
960 if (!inode[type]) {
961 status = -ENOENT;
962 goto out_quota_off;
963 }
287a8095
CH		 964 status = dquot_enable(inode[type], type, QFMT_OCFS2,
965 DQUOT_USAGE_ENABLED);
19ece546
JK		 966 if (status < 0)
967 goto out_quota_off;
968 }
969
52362810 970 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
19ece546
JK		 971 iput(inode[type]);
972 return 0;
973out_quota_off:
974 ocfs2_disable_quotas(osb);
52362810 975 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
19ece546
JK		 976 iput(inode[type]);
977 mlog_errno(status);
978 return status;
979}
980
981static void ocfs2_disable_quotas(struct ocfs2_super *osb)
982{
983 int type;
984 struct inode *inode;
985 struct super_block *sb = osb->sb;
c06bcbfa 986 struct ocfs2_mem_dqinfo *oinfo;
19ece546
JK		 987
988 /* We mostly ignore errors in this function because there's not much
989 * we can do when we see them */
52362810 990 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
19ece546
JK		 991 if (!sb_has_quota_loaded(sb, type))
992 continue;
c06bcbfa
JK		 993 /* Cancel periodic syncing before we grab dqonoff_mutex */
994 oinfo = sb_dqinfo(sb, type)->dqi_priv;
995 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
19ece546
JK		 996 inode = igrab(sb->s_dquot.files[type]);
997 /* Turn off quotas. This will remove all dquot structures from
998 * memory and so they will be automatically synced to global
999 * quota files */
0f0dd62f
CH		 1000 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
1001 DQUOT_LIMITS_ENABLED);
19ece546
JK		 1002 if (!inode)
1003 continue;
1004 iput(inode);
1005 }
1006}
1007
ccd979bd
MF		 1008static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1009{
1010 struct dentry *root;
1011 int status, sector_size;
c0123ade 1012 struct mount_options parsed_options;
ccd979bd
MF		 1013 struct inode *inode = NULL;
1014 struct ocfs2_super *osb = NULL;
1015 struct buffer_head *bh = NULL;
49fa8140 1016 char nodestr[12];
73be192b 1017 struct ocfs2_blockcheck_stats stats;
ccd979bd 1018
32a42d39 1019 trace_ocfs2_fill_super(sb, data, silent);
ccd979bd 1020
c0123ade 1021 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 1022 status = -EINVAL;
1023 goto read_super_error;
1024 }
1025
1026 /* probe for superblock */
73be192b 1027 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
ccd979bd
MF		 1028 if (status < 0) {
1029 mlog(ML_ERROR, "superblock probe failed!\n");
1030 goto read_super_error;
1031 }
1032
73be192b 1033 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
ccd979bd
MF		 1034 osb = OCFS2_SB(sb);
1035 if (status < 0) {
1036 mlog_errno(status);
1037 goto read_super_error;
1038 }
1039 brelse(bh);
1040 bh = NULL;
a68979b8 1041
5297aad8
JK		 1042 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1043 status = -EINVAL;
1044 goto read_super_error;
1045 }
c0123ade
TY		 1046 osb->s_mount_opt = parsed_options.mount_opt;
1047 osb->s_atime_quantum = parsed_options.atime_quantum;
1048 osb->preferred_slot = parsed_options.slot;
d147b3d6 1049 osb->osb_commit_interval = parsed_options.commit_interval;
73c8a800
MF		 1050
1051 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
d02f00cc 1052 osb->osb_resv_level = parsed_options.resv_level;
83f92318
MF		 1053 osb->osb_dir_resv_level = parsed_options.resv_level;
1054 if (parsed_options.dir_resv_level == -1)
1055 osb->osb_dir_resv_level = parsed_options.resv_level;
1056 else
1057 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
ccd979bd 1058
b61817e1
JB		 1059 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1060 if (status)
1061 goto read_super_error;
1062
ccd979bd
MF		 1063 sb->s_magic = OCFS2_SUPER_MAGIC;
1064
9e1f1de0 1065 sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
a68979b8
TY		 1066 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1067
ccd979bd
MF		 1068 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1069 * heartbeat=none */
1070 if (bdev_read_only(sb->s_bdev)) {
1071 if (!(sb->s_flags & MS_RDONLY)) {
1072 status = -EACCES;
1073 mlog(ML_ERROR, "Readonly device detected but readonly "
1074 "mount was not specified.\n");
1075 goto read_super_error;
1076 }
1077
1078 /* You should not be able to start a local heartbeat
1079 * on a readonly device. */
1080 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1081 status = -EROFS;
1082 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1083 "device.\n");
1084 goto read_super_error;
1085 }
1086
1087 status = ocfs2_check_journals_nolocks(osb);
1088 if (status < 0) {
1089 if (status == -EROFS)
1090 mlog(ML_ERROR, "Recovery required on readonly "
1091 "file system, but write access is "
1092 "unavailable.\n");
1093 else
2bd63216 1094 mlog_errno(status);
ccd979bd
MF		 1095 goto read_super_error;
1096 }
1097
1098 ocfs2_set_ro_flag(osb, 1);
1099
619c200d
SM		 1100 printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
1101 "Cluster services will not be used for this mount. "
1102 "Recovery will be skipped.\n", osb->dev_str);
ccd979bd
MF		 1103 }
1104
1105 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 1106 if (sb->s_flags & MS_RDONLY)
1107 ocfs2_set_ro_flag(osb, 0);
1108 }
1109
c271c5c2
SM		 1110 status = ocfs2_verify_heartbeat(osb);
1111 if (status < 0) {
1112 mlog_errno(status);
1113 goto read_super_error;
1114 }
1115
ccd979bd
MF		 1116 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1117 ocfs2_debugfs_root);
8f443e23 1118 if (!osb->osb_debug_root) {
ccd979bd
MF		 1119 status = -EINVAL;
1120 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1121 goto read_super_error;
1122 }
1123
50397507
SM		 1124 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1125 osb->osb_debug_root,
1126 osb,
1127 &ocfs2_osb_debug_fops);
8f443e23 1128 if (!osb->osb_ctxt) {
50397507
SM		 1129 status = -EINVAL;
1130 mlog_errno(status);
1131 goto read_super_error;
1132 }
1133
73be192b
JB		 1134 if (ocfs2_meta_ecc(osb)) {
1135 status = ocfs2_blockcheck_stats_debugfs_install(
1136 &osb->osb_ecc_stats,
1137 osb->osb_debug_root);
1138 if (status) {
1139 mlog(ML_ERROR,
1140 "Unable to create blockcheck statistics "
1141 "files\n");
1142 goto read_super_error;
1143 }
1144 }
1145
ccd979bd 1146 status = ocfs2_mount_volume(sb);
ccd979bd
MF		 1147 if (status < 0)
1148 goto read_super_error;
1149
be0d93f0
AV		 1150 if (osb->root_inode)
1151 inode = igrab(osb->root_inode);
1152
ccd979bd
MF		 1153 if (!inode) {
1154 status = -EIO;
1155 mlog_errno(status);
1156 goto read_super_error;
1157 }
1158
48fde701 1159 root = d_make_root(inode);
ccd979bd
MF		 1160 if (!root) {
1161 status = -ENOMEM;
1162 mlog_errno(status);
1163 goto read_super_error;
1164 }
1165
1166 sb->s_root = root;
1167
1168 ocfs2_complete_mount_recovery(osb);
1169
c271c5c2
SM		 1170 if (ocfs2_mount_local(osb))
1171 snprintf(nodestr, sizeof(nodestr), "local");
1172 else
19fdb624 1173 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1174
1175 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 1176 "with %s data mode.\n",
c271c5c2 1177 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 1178 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1179 "ordered");
1180
1181 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1182 wake_up(&osb->osb_mount_event);
1183
19ece546
JK		 1184 /* Now we can initialize quotas because we can afford to wait
1185 * for cluster locks recovery now. That also means that truncation
1186 * log recovery can happen but that waits for proper quota setup */
1187 if (!(sb->s_flags & MS_RDONLY)) {
1188 status = ocfs2_enable_quotas(osb);
1189 if (status < 0) {
1190 /* We have to err-out specially here because
1191 * s_root is already set */
1192 mlog_errno(status);
1193 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1194 wake_up(&osb->osb_mount_event);
19ece546
JK		 1195 return status;
1196 }
1197 }
1198
1199 ocfs2_complete_quota_recovery(osb);
1200
1201 /* Now we wake up again for processes waiting for quotas */
1202 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1203 wake_up(&osb->osb_mount_event);
1204
df152c24 1205 /* Start this when the mount is almost sure of being successful */
8b712cd5 1206 ocfs2_orphan_scan_start(osb);
df152c24 1207
ccd979bd
MF		 1208 return status;
1209
1210read_super_error:
a81cb88b 1211 brelse(bh);
ccd979bd 1212
ccd979bd
MF		 1213 if (osb) {
1214 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1215 wake_up(&osb->osb_mount_event);
1216 ocfs2_dismount_volume(sb, 1);
1217 }
1218
c1e8d35e
TM		 1219 if (status)
1220 mlog_errno(status);
ccd979bd
MF		 1221 return status;
1222}
1223
152a0836 1224static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
454e2398
DH		 1225 int flags,
1226 const char *dev_name,
152a0836 1227 void *data)
ccd979bd 1228{
152a0836 1229 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
ccd979bd
MF		 1230}
1231
1232static struct file_system_type ocfs2_fs_type = {
1233 .owner = THIS_MODULE,
1234 .name = "ocfs2",
152a0836 1235 .mount = ocfs2_mount,
8ed6b237 1236 .kill_sb = kill_block_super,
1ba9da2f 1237 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 1238 .next = NULL
1239};
91417705 1240MODULE_ALIAS_FS("ocfs2");
ccd979bd 1241
5297aad8
JK		 1242static int ocfs2_check_set_options(struct super_block *sb,
1243 struct mount_options *options)
1244{
1245 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1246 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1247 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1248 mlog(ML_ERROR, "User quotas were requested, but this "
1249 "filesystem does not have the feature enabled.\n");
1250 return 0;
1251 }
1252 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1253 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1254 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1255 mlog(ML_ERROR, "Group quotas were requested, but this "
1256 "filesystem does not have the feature enabled.\n");
1257 return 0;
1258 }
1259 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1260 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1261 mlog(ML_ERROR, "ACL support requested but extended attributes "
1262 "feature is not enabled\n");
1263 return 0;
1264 }
1265 /* No ACL setting specified? Use XATTR feature... */
1266 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1267 OCFS2_MOUNT_NO_POSIX_ACL))) {
1268 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1269 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1270 else
1271 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1272 }
1273 return 1;
1274}
1275
ccd979bd
MF		 1276static int ocfs2_parse_options(struct super_block *sb,
1277 char *options,
c0123ade 1278 struct mount_options *mopt,
ccd979bd
MF		 1279 int is_remount)
1280{
52c303c5 1281 int status, user_stack = 0;
ccd979bd 1282 char *p;
2c442719 1283 u32 tmp;
3eb5bdf0
NZ		 1284 int token, option;
1285 substring_t args[MAX_OPT_ARGS];
ccd979bd 1286
32a42d39 1287 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
ccd979bd 1288
d147b3d6 1289 mopt->commit_interval = 0;
4b37fcb7 1290 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
c0123ade
TY		 1291 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1292 mopt->slot = OCFS2_INVALID_SLOT;
73c8a800 1293 mopt->localalloc_opt = -1;
b61817e1 1294 mopt->cluster_stack[0] = '\0';
d02f00cc 1295 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
83f92318 1296 mopt->dir_resv_level = -1;
ccd979bd
MF		 1297
1298 if (!options) {
1299 status = 1;
1300 goto bail;
1301 }
1302
1303 while ((p = strsep(&options, ",")) != NULL) {
ccd979bd
MF		 1304 if (!*p)
1305 continue;
1306
1307 token = match_token(p, tokens, args);
1308 switch (token) {
1309 case Opt_hb_local:
c0123ade 1310 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 1311 break;
1312 case Opt_hb_none:
2c442719
SM		 1313 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1314 break;
1315 case Opt_hb_global:
1316 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
ccd979bd
MF		 1317 break;
1318 case Opt_barrier:
1319 if (match_int(&args[0], &option)) {
1320 status = 0;
1321 goto bail;
1322 }
1323 if (option)
c0123ade 1324 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 1325 else
c0123ade 1326 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 1327 break;
1328 case Opt_intr:
c0123ade 1329 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1330 break;
1331 case Opt_nointr:
c0123ade 1332 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1333 break;
1334 case Opt_err_panic:
7d0fb914
GR		 1335 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
1336 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
c0123ade 1337 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1338 break;
1339 case Opt_err_ro:
7d0fb914 1340 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_CONT;
c0123ade 1341 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
7d0fb914
GR		 1342 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_ROFS;
1343 break;
1344 case Opt_err_cont:
1345 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_ROFS;
1346 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1347 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_CONT;
ccd979bd
MF		 1348 break;
1349 case Opt_data_ordered:
c0123ade 1350 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 1351 break;
1352 case Opt_data_writeback:
c0123ade 1353 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 1354 break;
cf1d6c76
TY		 1355 case Opt_user_xattr:
1356 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1357 break;
1358 case Opt_nouser_xattr:
1359 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1360 break;
7f1a37e3
TY		 1361 case Opt_atime_quantum:
1362 if (match_int(&args[0], &option)) {
1363 status = 0;
1364 goto bail;
1365 }
1366 if (option >= 0)
c0123ade 1367 mopt->atime_quantum = option;
7f1a37e3 1368 break;
baf4661a 1369 case Opt_slot:
baf4661a
SM		 1370 if (match_int(&args[0], &option)) {
1371 status = 0;
1372 goto bail;
1373 }
1374 if (option)
c0123ade 1375 mopt->slot = (s16)option;
baf4661a 1376 break;
d147b3d6 1377 case Opt_commit:
d147b3d6
MF		 1378 if (match_int(&args[0], &option)) {
1379 status = 0;
1380 goto bail;
1381 }
1382 if (option < 0)
1383 return 0;
1384 if (option == 0)
2b4e30fb 1385 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
d147b3d6
MF		 1386 mopt->commit_interval = HZ * option;
1387 break;
2fbe8d1e 1388 case Opt_localalloc:
2fbe8d1e
SM		 1389 if (match_int(&args[0], &option)) {
1390 status = 0;
1391 goto bail;
1392 }
73c8a800 1393 if (option >= 0)
2fbe8d1e
SM		 1394 mopt->localalloc_opt = option;
1395 break;
53fc622b
MF		 1396 case Opt_localflocks:
1397 /*
1398 * Changing this during remount could race
1399 * flock() requests, or "unbalance" existing
1400 * ones (e.g., a lock is taken in one mode but
1401 * dropped in the other). If users care enough
1402 * to flip locking modes during remount, we
1403 * could add a "local" flag to individual
1404 * flock structures for proper tracking of
1405 * state.
1406 */
1407 if (!is_remount)
1408 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1409 break;
b61817e1
JB		 1410 case Opt_stack:
1411 /* Check both that the option we were passed
1412 * is of the right length and that it is a proper
1413 * string of the right length.
1414 */
1415 if (((args[0].to - args[0].from) !=
1416 OCFS2_STACK_LABEL_LEN) ||
1417 (strnlen(args[0].from,
1418 OCFS2_STACK_LABEL_LEN) !=
1419 OCFS2_STACK_LABEL_LEN)) {
1420 mlog(ML_ERROR,
1421 "Invalid cluster_stack option\n");
1422 status = 0;
1423 goto bail;
1424 }
1425 memcpy(mopt->cluster_stack, args[0].from,
1426 OCFS2_STACK_LABEL_LEN);
1427 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
52c303c5
MF		 1428 /*
1429 * Open code the memcmp here as we don't have
1430 * an osb to pass to
1431 * ocfs2_userspace_stack().
1432 */
1433 if (memcmp(mopt->cluster_stack,
1434 OCFS2_CLASSIC_CLUSTER_STACK,
1435 OCFS2_STACK_LABEL_LEN))
1436 user_stack = 1;
b61817e1 1437 break;
12462f1d
JB		 1438 case Opt_inode64:
1439 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1440 break;
19ece546 1441 case Opt_usrquota:
19ece546
JK		 1442 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1443 break;
1444 case Opt_grpquota:
19ece546
JK		 1445 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1446 break;
7bdb0d18
TY		 1447 case Opt_coherency_buffered:
1448 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1449 break;
1450 case Opt_coherency_full:
1451 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1452 break;
a68979b8
TY		 1453 case Opt_acl:
1454 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
5297aad8 1455 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
a68979b8
TY		 1456 break;
1457 case Opt_noacl:
5297aad8 1458 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
a68979b8
TY		 1459 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1460 break;
d02f00cc
MF		 1461 case Opt_resv_level:
1462 if (is_remount)
1463 break;
1464 if (match_int(&args[0], &option)) {
1465 status = 0;
1466 goto bail;
1467 }
1468 if (option >= OCFS2_MIN_RESV_LEVEL &&
1469 option < OCFS2_MAX_RESV_LEVEL)
1470 mopt->resv_level = option;
1471 break;
83f92318
MF		 1472 case Opt_dir_resv_level:
1473 if (is_remount)
1474 break;
1475 if (match_int(&args[0], &option)) {
1476 status = 0;
1477 goto bail;
1478 }
1479 if (option >= OCFS2_MIN_RESV_LEVEL &&
1480 option < OCFS2_MAX_RESV_LEVEL)
1481 mopt->dir_resv_level = option;
1482 break;
1dfeb768 1483 case Opt_journal_async_commit:
1484 mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
1485 break;
ccd979bd
MF		 1486 default:
1487 mlog(ML_ERROR,
1488 "Unrecognized mount option \"%s\" "
1489 "or missing value\n", p);
1490 status = 0;
1491 goto bail;
1492 }
1493 }
1494
52c303c5
MF		 1495 if (user_stack == 0) {
1496 /* Ensure only one heartbeat mode */
1497 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1498 OCFS2_MOUNT_HB_GLOBAL |
1499 OCFS2_MOUNT_HB_NONE);
1500 if (hweight32(tmp) != 1) {
1501 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1502 status = 0;
1503 goto bail;
1504 }
2c442719
SM		 1505 }
1506
ccd979bd
MF		 1507 status = 1;
1508
1509bail:
ccd979bd
MF		 1510 return status;
1511}
1512
34c80b1d 1513static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
d550071c 1514{
34c80b1d 1515 struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
d550071c 1516 unsigned long opts = osb->s_mount_opt;
ebcee4b5 1517 unsigned int local_alloc_megs;
d550071c 1518
2c442719
SM		 1519 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1520 seq_printf(s, ",_netdev");
1521 if (opts & OCFS2_MOUNT_HB_LOCAL)
1522 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1523 else
1524 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1525 } else
1526 seq_printf(s, ",%s", OCFS2_HB_NONE);
d550071c
SM		 1527
1528 if (opts & OCFS2_MOUNT_NOINTR)
1529 seq_printf(s, ",nointr");
1530
1531 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1532 seq_printf(s, ",data=writeback");
1533 else
1534 seq_printf(s, ",data=ordered");
1535
1536 if (opts & OCFS2_MOUNT_BARRIER)
1537 seq_printf(s, ",barrier=1");
1538
1539 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1540 seq_printf(s, ",errors=panic");
7d0fb914
GR		 1541 else if (opts & OCFS2_MOUNT_ERRORS_CONT)
1542 seq_printf(s, ",errors=continue");
d550071c
SM		 1543 else
1544 seq_printf(s, ",errors=remount-ro");
1545
1546 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1547 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1548
34c80b1d 1549 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
d550071c 1550
d147b3d6
MF		 1551 if (osb->osb_commit_interval)
1552 seq_printf(s, ",commit=%u",
1553 (unsigned) (osb->osb_commit_interval / HZ));
1554
ebcee4b5 1555 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
6b82021b 1556 if (local_alloc_megs != ocfs2_la_default_mb(osb))
ebcee4b5 1557 seq_printf(s, ",localalloc=%d", local_alloc_megs);
2fbe8d1e 1558
53fc622b
MF		 1559 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1560 seq_printf(s, ",localflocks,");
1561
b61817e1 1562 if (osb->osb_cluster_stack[0])
a068acf2
KC		 1563 seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
1564 OCFS2_STACK_LABEL_LEN);
19ece546
JK		 1565 if (opts & OCFS2_MOUNT_USRQUOTA)
1566 seq_printf(s, ",usrquota");
1567 if (opts & OCFS2_MOUNT_GRPQUOTA)
1568 seq_printf(s, ",grpquota");
b61817e1 1569
7bdb0d18
TY		 1570 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1571 seq_printf(s, ",coherency=buffered");
1572 else
1573 seq_printf(s, ",coherency=full");
1574
b0f73cfc
SM		 1575 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1576 seq_printf(s, ",nouser_xattr");
1577 else
1578 seq_printf(s, ",user_xattr");
1579
12462f1d
JB		 1580 if (opts & OCFS2_MOUNT_INODE64)
1581 seq_printf(s, ",inode64");
1582
a68979b8
TY		 1583 if (opts & OCFS2_MOUNT_POSIX_ACL)
1584 seq_printf(s, ",acl");
1585 else
1586 seq_printf(s, ",noacl");
a68979b8 1587
d02f00cc
MF		 1588 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1589 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1590
83f92318
MF		 1591 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1592 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1593
1dfeb768 1594 if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
1595 seq_printf(s, ",journal_async_commit");
1596
d550071c
SM		 1597 return 0;
1598}
1599
ccd979bd
MF		 1600static int __init ocfs2_init(void)
1601{
c18ceab0 1602 int status;
a11f7e63 1603
ccd979bd 1604 status = init_ocfs2_uptodate_cache();
342827d7
AV		 1605 if (status < 0)
1606 goto out1;
ccd979bd
MF		 1607
1608 status = ocfs2_initialize_mem_caches();
342827d7
AV		 1609 if (status < 0)
1610 goto out2;
ccd979bd
MF		 1611
1612 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1613 if (!ocfs2_wq) {
1614 status = -ENOMEM;
342827d7 1615 goto out3;
ccd979bd
MF		 1616 }
1617
ccd979bd 1618 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
8f443e23
LT		 1619 if (!ocfs2_debugfs_root) {
1620 status = -ENOMEM;
ccd979bd 1621 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
dc171580 1622 goto out4;
ccd979bd
MF		 1623 }
1624
63e0c48a
JB		 1625 ocfs2_set_locking_protocol();
1626
9e33d69f 1627 status = register_quota_format(&ocfs2_quota_format);
342827d7
AV		 1628 if (status < 0)
1629 goto out4;
1630 status = register_filesystem(&ocfs2_fs_type);
1631 if (!status)
1632 return 0;
ccd979bd 1633
342827d7
AV		 1634 unregister_quota_format(&ocfs2_quota_format);
1635out4:
1636 destroy_workqueue(ocfs2_wq);
1637 debugfs_remove(ocfs2_debugfs_root);
1638out3:
1639 ocfs2_free_mem_caches();
1640out2:
1641 exit_ocfs2_uptodate_cache();
1642out1:
1643 mlog_errno(status);
1644 return status;
ccd979bd
MF		 1645}
1646
1647static void __exit ocfs2_exit(void)
1648{
ccd979bd
MF		 1649 if (ocfs2_wq) {
1650 flush_workqueue(ocfs2_wq);
1651 destroy_workqueue(ocfs2_wq);
1652 }
1653
9e33d69f
JK		 1654 unregister_quota_format(&ocfs2_quota_format);
1655
ccd979bd
MF		 1656 debugfs_remove(ocfs2_debugfs_root);
1657
1658 ocfs2_free_mem_caches();
1659
1660 unregister_filesystem(&ocfs2_fs_type);
1661
ccd979bd 1662 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 1663}
1664
1665static void ocfs2_put_super(struct super_block *sb)
1666{
32a42d39 1667 trace_ocfs2_put_super(sb);
ccd979bd
MF		 1668
1669 ocfs2_sync_blockdev(sb);
1670 ocfs2_dismount_volume(sb, 0);
ccd979bd
MF		 1671}
1672
726c3342 1673static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 1674{
1675 struct ocfs2_super *osb;
1676 u32 numbits, freebits;
1677 int status;
1678 struct ocfs2_dinode *bm_lock;
1679 struct buffer_head *bh = NULL;
1680 struct inode *inode = NULL;
1681
32a42d39 1682 trace_ocfs2_statfs(dentry->d_sb, buf);
ccd979bd 1683
726c3342 1684 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 1685
1686 inode = ocfs2_get_system_file_inode(osb,
1687 GLOBAL_BITMAP_SYSTEM_INODE,
1688 OCFS2_INVALID_SLOT);
1689 if (!inode) {
1690 mlog(ML_ERROR, "failed to get bitmap inode\n");
1691 status = -EIO;
1692 goto bail;
1693 }
1694
e63aecb6 1695 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1696 if (status < 0) {
1697 mlog_errno(status);
1698 goto bail;
1699 }
1700
1701 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1702
1703 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1704 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1705
1706 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1707 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1708 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1709 buf->f_blocks = ((sector_t) numbits) *
1710 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1711 buf->f_bfree = ((sector_t) freebits) *
1712 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1713 buf->f_bavail = buf->f_bfree;
1714 buf->f_files = numbits;
1715 buf->f_ffree = freebits;
837711f8
CL		 1716 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1717 & 0xFFFFFFFFUL;
1718 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1719 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
ccd979bd
MF		 1720
1721 brelse(bh);
1722
e63aecb6 1723 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1724 status = 0;
1725bail:
72865d92 1726 iput(inode);
ccd979bd 1727
c1e8d35e
TM		 1728 if (status)
1729 mlog_errno(status);
ccd979bd
MF		 1730
1731 return status;
1732}
1733
51cc5068 1734static void ocfs2_inode_init_once(void *data)
ccd979bd
MF		 1735{
1736 struct ocfs2_inode_info *oi = data;
1737
a35afb83
CL		 1738 oi->ip_flags = 0;
1739 oi->ip_open_count = 0;
1740 spin_lock_init(&oi->ip_lock);
1741 ocfs2_extent_map_init(&oi->vfs_inode);
1742 INIT_LIST_HEAD(&oi->ip_io_markers);
a35afb83 1743 oi->ip_dir_start_lookup = 0;
c18ceab0 1744 mutex_init(&oi->ip_unaligned_aio);
a35afb83 1745 init_rwsem(&oi->ip_alloc_sem);
cf1d6c76 1746 init_rwsem(&oi->ip_xattr_sem);
a35afb83 1747 mutex_init(&oi->ip_io_mutex);
ccd979bd 1748
a35afb83
CL		 1749 oi->ip_blkno = 0ULL;
1750 oi->ip_clusters = 0;
ccd979bd 1751
4fe370af
MF		 1752 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1753
a35afb83 1754 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1755 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1756 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1757
8cb471e8 1758 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
6e5a3d75 1759 &ocfs2_inode_caching_ops);
ccd979bd 1760
a35afb83 1761 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1762}
1763
1764static int ocfs2_initialize_mem_caches(void)
1765{
1766 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1767 sizeof(struct ocfs2_inode_info),
1768 0,
1769 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
5d097056 1770 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
20c2df83 1771 ocfs2_inode_init_once);
9e33d69f
JK		 1772 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1773 sizeof(struct ocfs2_dquot),
1774 0,
1775 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1776 SLAB_MEM_SPREAD),
1777 NULL);
1778 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1779 sizeof(struct ocfs2_quota_chunk),
1780 0,
1781 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1782 NULL);
1783 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1784 !ocfs2_qf_chunk_cachep) {
1785 if (ocfs2_inode_cachep)
1786 kmem_cache_destroy(ocfs2_inode_cachep);
1787 if (ocfs2_dquot_cachep)
1788 kmem_cache_destroy(ocfs2_dquot_cachep);
1789 if (ocfs2_qf_chunk_cachep)
1790 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
ccd979bd 1791 return -ENOMEM;
9e33d69f 1792 }
ccd979bd 1793
ccd979bd
MF		 1794 return 0;
1795}
1796
1797static void ocfs2_free_mem_caches(void)
1798{
8c0a8537
KS		 1799 /*
1800 * Make sure all delayed rcu free inodes are flushed before we
1801 * destroy cache.
1802 */
1803 rcu_barrier();
ccd979bd
MF		 1804 if (ocfs2_inode_cachep)
1805 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd 1806 ocfs2_inode_cachep = NULL;
9e33d69f
JK		 1807
1808 if (ocfs2_dquot_cachep)
1809 kmem_cache_destroy(ocfs2_dquot_cachep);
1810 ocfs2_dquot_cachep = NULL;
1811
1812 if (ocfs2_qf_chunk_cachep)
1813 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1814 ocfs2_qf_chunk_cachep = NULL;
ccd979bd
MF		 1815}
1816
1817static int ocfs2_get_sector(struct super_block *sb,
1818 struct buffer_head **bh,
1819 int block,
1820 int sect_size)
1821{
1822 if (!sb_set_blocksize(sb, sect_size)) {
1823 mlog(ML_ERROR, "unable to set blocksize\n");
1824 return -EIO;
1825 }
1826
1827 *bh = sb_getblk(sb, block);
1828 if (!*bh) {
7391a294
RX		 1829 mlog_errno(-ENOMEM);
1830 return -ENOMEM;
ccd979bd
MF		 1831 }
1832 lock_buffer(*bh);
1833 if (!buffer_dirty(*bh))
1834 clear_buffer_uptodate(*bh);
1835 unlock_buffer(*bh);
1836 ll_rw_block(READ, 1, bh);
1837 wait_on_buffer(*bh);
28d57d43 1838 if (!buffer_uptodate(*bh)) {
1839 mlog_errno(-EIO);
1840 brelse(*bh);
1841 *bh = NULL;
1842 return -EIO;
1843 }
1844
ccd979bd
MF		 1845 return 0;
1846}
1847
ccd979bd
MF		 1848static int ocfs2_mount_volume(struct super_block *sb)
1849{
1850 int status = 0;
1851 int unlock_super = 0;
1852 struct ocfs2_super *osb = OCFS2_SB(sb);
1853
ccd979bd
MF		 1854 if (ocfs2_is_hard_readonly(osb))
1855 goto leave;
1856
ccd979bd
MF		 1857 status = ocfs2_dlm_init(osb);
1858 if (status < 0) {
1859 mlog_errno(status);
1860 goto leave;
1861 }
1862
ccd979bd
MF		 1863 status = ocfs2_super_lock(osb, 1);
1864 if (status < 0) {
1865 mlog_errno(status);
1866 goto leave;
1867 }
1868 unlock_super = 1;
1869
1870 /* This will load up the node map and add ourselves to it. */
1871 status = ocfs2_find_slot(osb);
1872 if (status < 0) {
1873 mlog_errno(status);
1874 goto leave;
1875 }
1876
ccd979bd
MF		 1877 /* load all node-local system inodes */
1878 status = ocfs2_init_local_system_inodes(osb);
1879 if (status < 0) {
1880 mlog_errno(status);
1881 goto leave;
1882 }
1883
1884 status = ocfs2_check_volume(osb);
1885 if (status < 0) {
1886 mlog_errno(status);
1887 goto leave;
1888 }
1889
1890 status = ocfs2_truncate_log_init(osb);
06c59bb8 1891 if (status < 0)
ccd979bd 1892 mlog_errno(status);
c271c5c2 1893
ccd979bd
MF		 1894leave:
1895 if (unlock_super)
1896 ocfs2_super_unlock(osb, 1);
1897
ccd979bd
MF		 1898 return status;
1899}
1900
ccd979bd
MF		 1901static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1902{
286eaa95 1903 int tmp, hangup_needed = 0;
ccd979bd 1904 struct ocfs2_super *osb = NULL;
99d7a882 1905 char nodestr[12];
ccd979bd 1906
32a42d39 1907 trace_ocfs2_dismount_volume(sb);
ccd979bd
MF		 1908
1909 BUG_ON(!sb);
1910 osb = OCFS2_SB(sb);
1911 BUG_ON(!osb);
1912
50397507
SM		 1913 debugfs_remove(osb->osb_ctxt);
1914
692684e1
SM		 1915 /* Orphan scan should be stopped as early as possible */
1916 ocfs2_orphan_scan_stop(osb);
1917
19ece546
JK		 1918 ocfs2_disable_quotas(osb);
1919
e3a767b6
JK		 1920 /* All dquots should be freed by now */
1921 WARN_ON(!llist_empty(&osb->dquot_drop_list));
1922 /* Wait for worker to be done with the work structure in osb */
1923 cancel_work_sync(&osb->dquot_drop_work);
1924
ccd979bd
MF		 1925 ocfs2_shutdown_local_alloc(osb);
1926
b253bfd8
X		 1927 ocfs2_truncate_log_shutdown(osb);
1928
553abd04
JB		 1929 /* This will disable recovery and flush any recovery work. */
1930 ocfs2_recovery_exit(osb);
ccd979bd
MF		 1931
1932 ocfs2_journal_shutdown(osb);
1933
1934 ocfs2_sync_blockdev(sb);
1935
374a263e
TM		 1936 ocfs2_purge_refcount_trees(osb);
1937
4670c46d
JB		 1938 /* No cluster connection means we've failed during mount, so skip
1939 * all the steps which depended on that to complete. */
1940 if (osb->cconn) {
ccd979bd
MF		 1941 tmp = ocfs2_super_lock(osb, 1);
1942 if (tmp < 0) {
1943 mlog_errno(tmp);
1944 return;
1945 }
19b613d4 1946 }
ccd979bd 1947
19b613d4
MF		 1948 if (osb->slot_num != OCFS2_INVALID_SLOT)
1949 ocfs2_put_slot(osb);
ccd979bd 1950
4670c46d 1951 if (osb->cconn)
ccd979bd 1952 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1953
1954 ocfs2_release_system_inodes(osb);
1955
6953b4c0 1956 /*
6953b4c0
JB		 1957 * If we're dismounting due to mount error, mount.ocfs2 will clean
1958 * up heartbeat. If we're a local mount, there is no heartbeat.
1959 * If we failed before we got a uuid_str yet, we can't stop
1960 * heartbeat. Otherwise, do it.
1961 */
03efed8a
TY		 1962 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1963 !ocfs2_is_hard_readonly(osb))
286eaa95
JB		 1964 hangup_needed = 1;
1965
1966 if (osb->cconn)
1967 ocfs2_dlm_shutdown(osb, hangup_needed);
1968
73be192b 1969 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
286eaa95
JB		 1970 debugfs_remove(osb->osb_debug_root);
1971
1972 if (hangup_needed)
6953b4c0 1973 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
ccd979bd
MF		 1974
1975 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1976
c271c5c2
SM		 1977 if (ocfs2_mount_local(osb))
1978 snprintf(nodestr, sizeof(nodestr), "local");
1979 else
19fdb624 1980 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1981
1982 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1983 osb->dev_str, nodestr);
ccd979bd
MF		 1984
1985 ocfs2_delete_osb(osb);
1986 kfree(osb);
1987 sb->s_dev = 0;
1988 sb->s_fs_info = NULL;
1989}
1990
1991static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1992 unsigned uuid_bytes)
1993{
1994 int i, ret;
1995 char *ptr;
1996
1997 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1998
cd861280 1999 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 2000 if (osb->uuid_str == NULL)
2001 return -ENOMEM;
2002
ccd979bd
MF		 2003 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2004 /* print with null */
2005 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2006 if (ret != 2) /* drop super cleans up */
2007 return -EINVAL;
2008 /* then only advance past the last char */
2009 ptr += 2;
2010 }
2011
2012 return 0;
2013}
2014
3bdb8efd
PL		 2015/* Make sure entire volume is addressable by our journal. Requires
2016 osb_clusters_at_boot to be valid and for the journal to have been
2017 initialized by ocfs2_journal_init(). */
2018static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2019{
2020 int status = 0;
2021 u64 max_block =
2022 ocfs2_clusters_to_blocks(osb->sb,
2023 osb->osb_clusters_at_boot) - 1;
2024
2025 /* 32-bit block number is always OK. */
2026 if (max_block <= (u32)~0ULL)
2027 goto out;
2028
2029 /* Volume is "huge", so see if our journal is new enough to
2030 support it. */
2031 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2032 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2033 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2034 JBD2_FEATURE_INCOMPAT_64BIT))) {
2035 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2036 "Enable the 'block64' journal option with tunefs.ocfs2");
2037 status = -EFBIG;
2038 goto out;
2039 }
2040
2041 out:
2042 return status;
2043}
2044
ccd979bd
MF		 2045static int ocfs2_initialize_super(struct super_block *sb,
2046 struct buffer_head *bh,
73be192b
JB		 2047 int sector_size,
2048 struct ocfs2_blockcheck_stats *stats)
ccd979bd 2049{
bddb8eb3 2050 int status;
5a254031
MF		 2051 int i, cbits, bbits;
2052 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 2053 struct inode *inode = NULL;
ccd979bd 2054 struct ocfs2_journal *journal;
ccd979bd 2055 struct ocfs2_super *osb;
3bdb8efd 2056 u64 total_blocks;
ccd979bd 2057
cd861280 2058 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 2059 if (!osb) {
2060 status = -ENOMEM;
2061 mlog_errno(status);
2062 goto bail;
2063 }
2064
2065 sb->s_fs_info = osb;
2066 sb->s_op = &ocfs2_sops;
ba87167c 2067 sb->s_d_op = &ocfs2_dentry_ops;
ccd979bd 2068 sb->s_export_op = &ocfs2_export_ops;
664dbd5f 2069 sb->s_qcop = &dquot_quotactl_sysfile_ops;
19ece546 2070 sb->dq_op = &ocfs2_quota_operations;
1c92ec67 2071 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
cf1d6c76 2072 sb->s_xattr = ocfs2_xattr_handlers;
e0dceaf0 2073 sb->s_time_gran = 1;
ccd979bd
MF		 2074 sb->s_flags |= MS_NOATIME;
2075 /* this is needed to support O_LARGEFILE */
5a254031
MF		 2076 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2077 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2078 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
58be19dc
VD		 2079 memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
2080 sizeof(di->id2.i_super.s_uuid));
ccd979bd 2081
9b7895ef
MF		 2082 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2083
2084 for (i = 0; i < 3; i++)
2085 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2086 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2087
ccd979bd
MF		 2088 osb->sb = sb;
2089 /* Save off for ocfs2_rw_direct */
2090 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 2091 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 2092
34d024f8
MF		 2093 spin_lock_init(&osb->dc_task_lock);
2094 init_waitqueue_head(&osb->dc_event);
2095 osb->dc_work_sequence = 0;
2096 osb->dc_wake_sequence = 0;
ccd979bd
MF		 2097 INIT_LIST_HEAD(&osb->blocked_lock_list);
2098 osb->blocked_lock_count = 0;
ccd979bd 2099 spin_lock_init(&osb->osb_lock);
c8b9cf9a 2100 spin_lock_init(&osb->osb_xattr_lock);
b89c5428 2101 ocfs2_init_steal_slots(osb);
ccd979bd 2102
43b10a20 2103 mutex_init(&osb->system_file_mutex);
2104
ccd979bd
MF		 2105 atomic_set(&osb->alloc_stats.moves, 0);
2106 atomic_set(&osb->alloc_stats.local_data, 0);
2107 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2108 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2109 atomic_set(&osb->alloc_stats.bg_extends, 0);
2110
73be192b
JB		 2111 /* Copy the blockcheck stats from the superblock probe */
2112 osb->osb_ecc_stats = *stats;
2113
ccd979bd
MF		 2114 ocfs2_init_node_maps(osb);
2115
2116 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2117 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2118
75d9bbc7
GR		 2119 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2120 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2121 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2122 osb->max_slots);
2123 status = -EINVAL;
2124 goto bail;
2125 }
75d9bbc7 2126
8b712cd5
JM		 2127 ocfs2_orphan_scan_init(osb);
2128
553abd04
JB		 2129 status = ocfs2_recovery_init(osb);
2130 if (status) {
2131 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2132 mlog_errno(status);
2133 goto bail;
2134 }
ccd979bd
MF		 2135
2136 init_waitqueue_head(&osb->checkpoint_event);
ccd979bd 2137
7f1a37e3
TY		 2138 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2139
ccd979bd
MF		 2140 osb->slot_num = OCFS2_INVALID_SLOT;
2141
8154da3d
TY		 2142 osb->s_xattr_inline_size = le16_to_cpu(
2143 di->id2.i_super.s_xattr_inline_size);
fdd77704 2144
ccd979bd
MF		 2145 osb->local_alloc_state = OCFS2_LA_UNUSED;
2146 osb->local_alloc_bh = NULL;
9c7af40b 2147 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
ccd979bd 2148
ccd979bd
MF		 2149 init_waitqueue_head(&osb->osb_mount_event);
2150
d02f00cc
MF		 2151 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2152 if (status) {
2153 mlog_errno(status);
2154 goto bail;
2155 }
2156
ccd979bd
MF		 2157 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2158 if (!osb->vol_label) {
2159 mlog(ML_ERROR, "unable to alloc vol label\n");
2160 status = -ENOMEM;
2161 goto bail;
2162 }
2163
539d8264
SM		 2164 osb->slot_recovery_generations =
2165 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2166 GFP_KERNEL);
2167 if (!osb->slot_recovery_generations) {
2168 status = -ENOMEM;
2169 mlog_errno(status);
2170 goto bail;
2171 }
2172
b4df6ed8
MF		 2173 init_waitqueue_head(&osb->osb_wipe_event);
2174 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2175 sizeof(*osb->osb_orphan_wipes),
2176 GFP_KERNEL);
2177 if (!osb->osb_orphan_wipes) {
2178 status = -ENOMEM;
2179 mlog_errno(status);
2180 goto bail;
2181 }
2182
374a263e
TM		 2183 osb->osb_rf_lock_tree = RB_ROOT;
2184
ccd979bd
MF		 2185 osb->s_feature_compat =
2186 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2187 osb->s_feature_ro_compat =
2188 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2189 osb->s_feature_incompat =
2190 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2191
2192 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2193 mlog(ML_ERROR, "couldn't mount because of unsupported "
2194 "optional features (%x).\n", i);
2195 status = -EINVAL;
2196 goto bail;
2197 }
2198 if (!(osb->sb->s_flags & MS_RDONLY) &&
2199 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2200 mlog(ML_ERROR, "couldn't mount RDWR because of "
2201 "unsupported optional features (%x).\n", i);
2202 status = -EINVAL;
2203 goto bail;
2204 }
2205
98f486f2
SM		 2206 if (ocfs2_clusterinfo_valid(osb)) {
2207 osb->osb_stackflags =
2208 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
c74a3bdd 2209 strlcpy(osb->osb_cluster_stack,
b61817e1 2210 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
c74a3bdd 2211 OCFS2_STACK_LABEL_LEN + 1);
b61817e1
JB		 2212 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2213 mlog(ML_ERROR,
2214 "couldn't mount because of an invalid "
2215 "cluster stack label (%s) \n",
2216 osb->osb_cluster_stack);
2217 status = -EINVAL;
2218 goto bail;
2219 }
c74a3bdd
GR		 2220 strlcpy(osb->osb_cluster_name,
2221 OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
2222 OCFS2_CLUSTER_NAME_LEN + 1);
b61817e1
JB		 2223 } else {
2224 /* The empty string is identical with classic tools that
2225 * don't know about s_cluster_info. */
2226 osb->osb_cluster_stack[0] = '\0';
2227 }
2228
ccd979bd
MF		 2229 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2230
2231 /* FIXME
2232 * This should be done in ocfs2_journal_init(), but unknown
2233 * ordering issues will cause the filesystem to crash.
2234 * If anyone wants to figure out what part of the code
2235 * refers to osb->journal before ocfs2_journal_init() is run,
2236 * be my guest.
2237 */
2238 /* initialize our journal structure */
2239
cd861280 2240 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 2241 if (!journal) {
2242 mlog(ML_ERROR, "unable to alloc journal\n");
2243 status = -ENOMEM;
2244 goto bail;
2245 }
2246 osb->journal = journal;
2247 journal->j_osb = osb;
2248
2249 atomic_set(&journal->j_num_trans, 0);
2250 init_rwsem(&journal->j_trans_barrier);
2251 init_waitqueue_head(&journal->j_checkpointed);
2252 spin_lock_init(&journal->j_lock);
2253 journal->j_trans_id = (unsigned long) 1;
2254 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 2255 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 2256 journal->j_state = OCFS2_JOURNAL_FREE;
2257
e3a767b6
JK		 2258 INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
2259 init_llist_head(&osb->dquot_drop_list);
2260
ccd979bd
MF		 2261 /* get some pseudo constants for clustersize bits */
2262 osb->s_clustersize_bits =
2263 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2264 osb->s_clustersize = 1 << osb->s_clustersize_bits;
ccd979bd
MF		 2265
2266 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2267 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2268 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2269 osb->s_clustersize);
2270 status = -EINVAL;
2271 goto bail;
2272 }
2273
3bdb8efd
PL		 2274 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2275 le32_to_cpu(di->i_clusters));
2276
2277 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2278 total_blocks);
2279 if (status) {
2280 mlog(ML_ERROR, "Volume too large "
2281 "to mount safely on this system");
2282 status = -EFBIG;
ccd979bd
MF		 2283 goto bail;
2284 }
2285
2286 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2287 sizeof(di->id2.i_super.s_uuid))) {
2288 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2289 status = -ENOMEM;
2290 goto bail;
2291 }
2292
69201bb1
FF		 2293 strlcpy(osb->vol_label, di->id2.i_super.s_label,
2294 OCFS2_MAX_VOL_LABEL_LEN);
ccd979bd
MF		 2295 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2296 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2297 osb->first_cluster_group_blkno =
2298 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2299 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
cf1d6c76 2300 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
32a42d39
TM		 2301 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2302 (unsigned long long)osb->root_blkno,
2303 (unsigned long long)osb->system_dir_blkno,
2304 osb->s_clustersize_bits);
ccd979bd
MF		 2305
2306 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2307 if (!osb->osb_dlm_debug) {
2308 status = -ENOMEM;
2309 mlog_errno(status);
2310 goto bail;
2311 }
2312
2313 atomic_set(&osb->vol_state, VOLUME_INIT);
2314
2315 /* load root, system_dir, and all global system inodes */
2316 status = ocfs2_init_global_system_inodes(osb);
2317 if (status < 0) {
2318 mlog_errno(status);
2319 goto bail;
2320 }
2321
2322 /*
2323 * global bitmap
2324 */
2325 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2326 OCFS2_INVALID_SLOT);
2327 if (!inode) {
2328 status = -EINVAL;
2329 mlog_errno(status);
2330 goto bail;
2331 }
2332
2333 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
6b82021b 2334 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
ccd979bd 2335 iput(inode);
ccd979bd 2336
8571882c
TM		 2337 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2338 osb->s_feature_incompat) * 8;
ccd979bd
MF		 2339
2340 status = ocfs2_init_slot_info(osb);
2341 if (status < 0) {
2342 mlog_errno(status);
2343 goto bail;
2344 }
9de16262 2345 cleancache_init_shared_fs(sb);
ccd979bd 2346
ccd979bd 2347bail:
ccd979bd
MF		 2348 return status;
2349}
2350
2351/*
2352 * will return: -EAGAIN if it is ok to keep searching for superblocks
2353 * -EINVAL if there is a bad superblock
2354 * 0 on success
2355 */
2356static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2357 struct buffer_head *bh,
73be192b
JB		 2358 u32 blksz,
2359 struct ocfs2_blockcheck_stats *stats)
ccd979bd
MF		 2360{
2361 int status = -EAGAIN;
2362
ccd979bd
MF		 2363 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2364 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
d030cc97
JB		 2365 /* We have to do a raw check of the feature here */
2366 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2367 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2368 status = ocfs2_block_check_validate(bh->b_data,
2369 bh->b_size,
73be192b
JB		 2370 &di->i_check,
2371 stats);
d030cc97
JB		 2372 if (status)
2373 goto out;
2374 }
ccd979bd
MF		 2375 status = -EINVAL;
2376 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2377 mlog(ML_ERROR, "found superblock with incorrect block "
2378 "size: found %u, should be %u\n",
2379 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2380 blksz);
2381 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2382 OCFS2_MAJOR_REV_LEVEL ||
2383 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2384 OCFS2_MINOR_REV_LEVEL) {
2385 mlog(ML_ERROR, "found superblock with bad version: "
2386 "found %u.%u, should be %u.%u\n",
2387 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2388 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2389 OCFS2_MAJOR_REV_LEVEL,
2390 OCFS2_MINOR_REV_LEVEL);
2391 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2392 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 2393 "found %llu, should be %llu\n",
1ca1a111 2394 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 2395 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 2396 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2397 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2398 mlog(ML_ERROR, "bad cluster size found: %u\n",
2399 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2400 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2401 mlog(ML_ERROR, "bad root_blkno: 0\n");
2402 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2403 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2404 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2405 mlog(ML_ERROR,
2406 "Superblock slots found greater than file system "
2407 "maximum: found %u, max %u\n",
2408 le16_to_cpu(di->id2.i_super.s_max_slots),
2409 OCFS2_MAX_SLOTS);
2410 } else {
2411 /* found it! */
2412 status = 0;
2413 }
2414 }
2415
d030cc97 2416out:
c1e8d35e
TM		 2417 if (status && status != -EAGAIN)
2418 mlog_errno(status);
ccd979bd
MF		 2419 return status;
2420}
2421
2422static int ocfs2_check_volume(struct ocfs2_super *osb)
2423{
bddb8eb3 2424 int status;
ccd979bd 2425 int dirty;
c271c5c2 2426 int local;
ccd979bd
MF		 2427 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2428 * recover
2429 * ourselves. */
2430
ccd979bd
MF		 2431 /* Init our journal object. */
2432 status = ocfs2_journal_init(osb->journal, &dirty);
2433 if (status < 0) {
2434 mlog(ML_ERROR, "Could not initialize journal!\n");
2435 goto finally;
2436 }
2437
3bdb8efd
PL		 2438 /* Now that journal has been initialized, check to make sure
2439 entire volume is addressable. */
2440 status = ocfs2_journal_addressable(osb);
2441 if (status)
2442 goto finally;
2443
ccd979bd
MF		 2444 /* If the journal was unmounted cleanly then we don't want to
2445 * recover anything. Otherwise, journal_load will do that
2446 * dirty work for us :) */
2447 if (!dirty) {
2448 status = ocfs2_journal_wipe(osb->journal, 0);
2449 if (status < 0) {
2450 mlog_errno(status);
2451 goto finally;
2452 }
2453 } else {
619c200d
SM		 2454 printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
2455 "unmounted cleanly, recovering it.\n", osb->dev_str);
ccd979bd
MF		 2456 }
2457
c271c5c2
SM		 2458 local = ocfs2_mount_local(osb);
2459
ccd979bd 2460 /* will play back anything left in the journal. */
539d8264 2461 status = ocfs2_journal_load(osb->journal, local, dirty);
01af4820
WW		 2462 if (status < 0) {
2463 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2464 goto finally;
2465 }
ccd979bd 2466
1dfeb768 2467 if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
2468 jbd2_journal_set_features(osb->journal->j_journal,
2469 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2470 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2471 else
2472 jbd2_journal_clear_features(osb->journal->j_journal,
2473 JBD2_FEATURE_COMPAT_CHECKSUM, 0,
2474 JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
2475
ccd979bd
MF		 2476 if (dirty) {
2477 /* recover my local alloc if we didn't unmount cleanly. */
2478 status = ocfs2_begin_local_alloc_recovery(osb,
2479 osb->slot_num,
2480 &local_alloc);
2481 if (status < 0) {
2482 mlog_errno(status);
2483 goto finally;
2484 }
2485 /* we complete the recovery process after we've marked
2486 * ourselves as mounted. */
2487 }
2488
ccd979bd
MF		 2489 status = ocfs2_load_local_alloc(osb);
2490 if (status < 0) {
2491 mlog_errno(status);
2492 goto finally;
2493 }
2494
2495 if (dirty) {
2496 /* Recovery will be completed after we've mounted the
2497 * rest of the volume. */
2498 osb->dirty = 1;
2499 osb->local_alloc_copy = local_alloc;
2500 local_alloc = NULL;
2501 }
2502
2503 /* go through each journal, trylock it and if you get the
2504 * lock, and it's marked as dirty, set the bit in the recover
2505 * map and launch a recovery thread for it. */
2506 status = ocfs2_mark_dead_nodes(osb);
9140db04
SE		 2507 if (status < 0) {
2508 mlog_errno(status);
2509 goto finally;
2510 }
2511
2512 status = ocfs2_compute_replay_slots(osb);
ccd979bd
MF		 2513 if (status < 0)
2514 mlog_errno(status);
2515
2516finally:
d787ab09 2517 kfree(local_alloc);
ccd979bd 2518
c1e8d35e
TM		 2519 if (status)
2520 mlog_errno(status);
ccd979bd
MF		 2521 return status;
2522}
2523
2524/*
2525 * The routine gets called from dismount or close whenever a dismount on
2526 * volume is requested and the osb open count becomes 1.
2527 * It will remove the osb from the global list and also free up all the
2528 * initialized resources and fileobject.
2529 */
2530static void ocfs2_delete_osb(struct ocfs2_super *osb)
2531{
ccd979bd
MF		 2532 /* This function assumes that the caller has the main osb resource */
2533
8e8a4603 2534 ocfs2_free_slot_info(osb);
ccd979bd 2535
b4df6ed8 2536 kfree(osb->osb_orphan_wipes);
539d8264 2537 kfree(osb->slot_recovery_generations);
ccd979bd
MF		 2538 /* FIXME
2539 * This belongs in journal shutdown, but because we have to
421f91d2 2540 * allocate osb->journal at the start of ocfs2_initialize_osb(),
ccd979bd
MF		 2541 * we free it here.
2542 */
2543 kfree(osb->journal);
d787ab09 2544 kfree(osb->local_alloc_copy);
ccd979bd 2545 kfree(osb->uuid_str);
f13a568e 2546 kfree(osb->vol_label);
ccd979bd
MF		 2547 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2548 memset(osb, 0, sizeof(struct ocfs2_super));
ccd979bd
MF		 2549}
2550
7d0fb914
GR		 2551/* Depending on the mount option passed, perform one of the following:
2552 * Put OCFS2 into a readonly state (default)
2553 * Return EIO so that only the process errs
2554 * Fix the error as if fsck.ocfs2 -y
2555 * panic
2556 */
2557static int ocfs2_handle_error(struct super_block *sb)
ccd979bd
MF		 2558{
2559 struct ocfs2_super *osb = OCFS2_SB(sb);
7d0fb914 2560 int rv = 0;
ccd979bd
MF		 2561
2562 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
7d0fb914
GR		 2563 pr_crit("On-disk corruption discovered. "
2564 "Please run fsck.ocfs2 once the filesystem is unmounted.\n");
ccd979bd 2565
7d0fb914
GR		 2566 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) {
2567 panic("OCFS2: (device %s): panic forced after error\n",
2568 sb->s_id);
2569 } else if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_CONT) {
2570 pr_crit("OCFS2: Returning error to the calling process.\n");
2571 rv = -EIO;
2572 } else { /* default option */
2573 rv = -EROFS;
2574 if (sb->s_flags & MS_RDONLY &&
2575 (ocfs2_is_soft_readonly(osb) ||
2576 ocfs2_is_hard_readonly(osb)))
2577 return rv;
2578
2579 pr_crit("OCFS2: File system is now read-only.\n");
2580 sb->s_flags |= MS_RDONLY;
2581 ocfs2_set_ro_flag(osb, 0);
2582 }
2583
2584 return rv;
ccd979bd
MF		 2585}
2586
7d0fb914 2587int __ocfs2_error(struct super_block *sb, const char *function,
1543306e 2588 const char *fmt, ...)
ccd979bd 2589{
1543306e 2590 struct va_format vaf;
ccd979bd
MF		 2591 va_list args;
2592
2593 va_start(args, fmt);
1543306e
JP		 2594 vaf.fmt = fmt;
2595 vaf.va = &args;
ccd979bd
MF		 2596
2597 /* Not using mlog here because we want to show the actual
2598 * function the error came from. */
7ecef14a 2599 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV",
1543306e
JP		 2600 sb->s_id, function, &vaf);
2601
2602 va_end(args);
ccd979bd 2603
7d0fb914 2604 return ocfs2_handle_error(sb);
ccd979bd
MF		 2605}
2606
2607/* Handle critical errors. This is intentionally more drastic than
2608 * ocfs2_handle_error, so we only use for things like journal errors,
2609 * etc. */
1543306e 2610void __ocfs2_abort(struct super_block *sb, const char *function,
ccd979bd
MF		 2611 const char *fmt, ...)
2612{
1543306e 2613 struct va_format vaf;
ccd979bd
MF		 2614 va_list args;
2615
2616 va_start(args, fmt);
ccd979bd 2617
1543306e
JP		 2618 vaf.fmt = fmt;
2619 vaf.va = &args;
2620
7ecef14a 2621 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV",
1543306e
JP		 2622 sb->s_id, function, &vaf);
2623
2624 va_end(args);
ccd979bd
MF		 2625
2626 /* We don't have the cluster support yet to go straight to
2627 * hard readonly in here. Until then, we want to keep
2628 * ocfs2_abort() so that we can at least mark critical
2629 * errors.
2630 *
2631 * TODO: This should abort the journal and alert other nodes
2632 * that our slot needs recovery. */
2633
2634 /* Force a panic(). This stinks, but it's better than letting
2635 * things continue without having a proper hard readonly
2636 * here. */
a2f2ddbf
SM		 2637 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2638 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 2639 ocfs2_handle_error(sb);
2640}
2641
e4b963f1
JB		 2642/*
2643 * Void signal blockers, because in-kernel sigprocmask() only fails
2644 * when SIG_* is wrong.
2645 */
2646void ocfs2_block_signals(sigset_t *oldset)
2647{
2648 int rc;
2649 sigset_t blocked;
2650
2651 sigfillset(&blocked);
2652 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2653 BUG_ON(rc);
2654}
2655
2656void ocfs2_unblock_signals(sigset_t *oldset)
2657{
2658 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2659 BUG_ON(rc);
2660}
2661
ccd979bd
MF		 2662module_init(ocfs2_init);
2663module_exit(ocfs2_exit);
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