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[net-next-2.6.git] / fs / ocfs2 / super.c
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>
337eb00a 44#include <linux/smp_lock.h>
ccd979bd
MF		 45
46#define MLOG_MASK_PREFIX ML_SUPER
47#include <cluster/masklog.h>
48
49#include "ocfs2.h"
50
51/* this should be the only file to include a version 1 header */
52#include "ocfs1_fs_compat.h"
53
54#include "alloc.h"
d030cc97 55#include "blockcheck.h"
ccd979bd
MF		 56#include "dlmglue.h"
57#include "export.h"
58#include "extent_map.h"
59#include "heartbeat.h"
60#include "inode.h"
61#include "journal.h"
62#include "localalloc.h"
63#include "namei.h"
64#include "slot_map.h"
65#include "super.h"
66#include "sysfile.h"
67#include "uptodate.h"
68#include "ver.h"
cf1d6c76 69#include "xattr.h"
9e33d69f 70#include "quota.h"
374a263e 71#include "refcounttree.h"
b89c5428 72#include "suballoc.h"
ccd979bd
MF		 73
74#include "buffer_head_io.h"
75
e18b890b 76static struct kmem_cache *ocfs2_inode_cachep = NULL;
9e33d69f
JK		 77struct kmem_cache *ocfs2_dquot_cachep;
78struct kmem_cache *ocfs2_qf_chunk_cachep;
ccd979bd 79
ccd979bd
MF		 80/* OCFS2 needs to schedule several differnt types of work which
81 * require cluster locking, disk I/O, recovery waits, etc. Since these
82 * types of work tend to be heavy we avoid using the kernel events
83 * workqueue and schedule on our own. */
84struct workqueue_struct *ocfs2_wq = NULL;
85
86static struct dentry *ocfs2_debugfs_root = NULL;
87
88MODULE_AUTHOR("Oracle");
89MODULE_LICENSE("GPL");
90
c0123ade
TY		 91struct mount_options
92{
d147b3d6 93 unsigned long commit_interval;
c0123ade
TY		 94 unsigned long mount_opt;
95 unsigned int atime_quantum;
96 signed short slot;
73c8a800 97 int localalloc_opt;
d02f00cc 98 unsigned int resv_level;
83f92318 99 int dir_resv_level;
b61817e1 100 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c0123ade
TY		 101};
102
ccd979bd 103static int ocfs2_parse_options(struct super_block *sb, char *options,
c0123ade 104 struct mount_options *mopt,
baf4661a 105 int is_remount);
5297aad8
JK		 106static int ocfs2_check_set_options(struct super_block *sb,
107 struct mount_options *options);
d550071c 108static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
ccd979bd
MF		 109static void ocfs2_put_super(struct super_block *sb);
110static int ocfs2_mount_volume(struct super_block *sb);
111static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
112static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
113static int ocfs2_initialize_mem_caches(void);
114static void ocfs2_free_mem_caches(void);
115static void ocfs2_delete_osb(struct ocfs2_super *osb);
116
726c3342 117static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
ccd979bd
MF		 118
119static int ocfs2_sync_fs(struct super_block *sb, int wait);
120
121static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
122static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
bddb8eb3 123static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
ccd979bd
MF		 124static int ocfs2_check_volume(struct ocfs2_super *osb);
125static int ocfs2_verify_volume(struct ocfs2_dinode *di,
126 struct buffer_head *bh,
73be192b
JB		 127 u32 sectsize,
128 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 129static int ocfs2_initialize_super(struct super_block *sb,
130 struct buffer_head *bh,
73be192b
JB		 131 int sector_size,
132 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 133static int ocfs2_get_sector(struct super_block *sb,
134 struct buffer_head **bh,
135 int block,
136 int sect_size);
ccd979bd
MF		 137static struct inode *ocfs2_alloc_inode(struct super_block *sb);
138static void ocfs2_destroy_inode(struct inode *inode);
19ece546
JK		 139static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
140static int ocfs2_enable_quotas(struct ocfs2_super *osb);
141static void ocfs2_disable_quotas(struct ocfs2_super *osb);
ccd979bd 142
ee9b6d61 143static const struct super_operations ocfs2_sops = {
ccd979bd
MF		 144 .statfs = ocfs2_statfs,
145 .alloc_inode = ocfs2_alloc_inode,
146 .destroy_inode = ocfs2_destroy_inode,
147 .drop_inode = ocfs2_drop_inode,
066d92dc 148 .evict_inode = ocfs2_evict_inode,
ccd979bd 149 .sync_fs = ocfs2_sync_fs,
ccd979bd
MF		 150 .put_super = ocfs2_put_super,
151 .remount_fs = ocfs2_remount,
d550071c 152 .show_options = ocfs2_show_options,
9e33d69f
JK		 153 .quota_read = ocfs2_quota_read,
154 .quota_write = ocfs2_quota_write,
ccd979bd
MF		 155};
156
157enum {
158 Opt_barrier,
159 Opt_err_panic,
160 Opt_err_ro,
161 Opt_intr,
162 Opt_nointr,
163 Opt_hb_none,
164 Opt_hb_local,
2c442719 165 Opt_hb_global,
ccd979bd
MF		 166 Opt_data_ordered,
167 Opt_data_writeback,
7f1a37e3 168 Opt_atime_quantum,
baf4661a 169 Opt_slot,
d147b3d6 170 Opt_commit,
2fbe8d1e 171 Opt_localalloc,
53fc622b 172 Opt_localflocks,
b61817e1 173 Opt_stack,
cf1d6c76
TY		 174 Opt_user_xattr,
175 Opt_nouser_xattr,
12462f1d 176 Opt_inode64,
a68979b8
TY		 177 Opt_acl,
178 Opt_noacl,
19ece546
JK		 179 Opt_usrquota,
180 Opt_grpquota,
7bdb0d18
TY		 181 Opt_coherency_buffered,
182 Opt_coherency_full,
d02f00cc 183 Opt_resv_level,
83f92318 184 Opt_dir_resv_level,
ccd979bd
MF		 185 Opt_err,
186};
187
a447c093 188static const match_table_t tokens = {
ccd979bd
MF		 189 {Opt_barrier, "barrier=%u"},
190 {Opt_err_panic, "errors=panic"},
191 {Opt_err_ro, "errors=remount-ro"},
192 {Opt_intr, "intr"},
193 {Opt_nointr, "nointr"},
194 {Opt_hb_none, OCFS2_HB_NONE},
195 {Opt_hb_local, OCFS2_HB_LOCAL},
2c442719 196 {Opt_hb_global, OCFS2_HB_GLOBAL},
ccd979bd
MF		 197 {Opt_data_ordered, "data=ordered"},
198 {Opt_data_writeback, "data=writeback"},
7f1a37e3 199 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 200 {Opt_slot, "preferred_slot=%u"},
d147b3d6 201 {Opt_commit, "commit=%u"},
2fbe8d1e 202 {Opt_localalloc, "localalloc=%d"},
53fc622b 203 {Opt_localflocks, "localflocks"},
b61817e1 204 {Opt_stack, "cluster_stack=%s"},
cf1d6c76
TY		 205 {Opt_user_xattr, "user_xattr"},
206 {Opt_nouser_xattr, "nouser_xattr"},
12462f1d 207 {Opt_inode64, "inode64"},
a68979b8
TY		 208 {Opt_acl, "acl"},
209 {Opt_noacl, "noacl"},
19ece546
JK		 210 {Opt_usrquota, "usrquota"},
211 {Opt_grpquota, "grpquota"},
7bdb0d18
TY		 212 {Opt_coherency_buffered, "coherency=buffered"},
213 {Opt_coherency_full, "coherency=full"},
d02f00cc 214 {Opt_resv_level, "resv_level=%u"},
83f92318 215 {Opt_dir_resv_level, "dir_resv_level=%u"},
ccd979bd
MF		 216 {Opt_err, NULL}
217};
218
50397507
SM		 219#ifdef CONFIG_DEBUG_FS
220static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
221{
50397507
SM		 222 struct ocfs2_cluster_connection *cconn = osb->cconn;
223 struct ocfs2_recovery_map *rm = osb->recovery_map;
df152c24
SM		 224 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
225 int i, out = 0;
50397507
SM		 226
227 out += snprintf(buf + out, len - out,
228 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
229 "Device", osb->dev_str, osb->uuid_str,
230 osb->fs_generation, osb->vol_label);
231
232 out += snprintf(buf + out, len - out,
233 "%10s => State: %d Flags: 0x%lX\n", "Volume",
234 atomic_read(&osb->vol_state), osb->osb_flags);
235
236 out += snprintf(buf + out, len - out,
237 "%10s => Block: %lu Cluster: %d\n", "Sizes",
238 osb->sb->s_blocksize, osb->s_clustersize);
239
240 out += snprintf(buf + out, len - out,
241 "%10s => Compat: 0x%X Incompat: 0x%X "
242 "ROcompat: 0x%X\n",
243 "Features", osb->s_feature_compat,
244 osb->s_feature_incompat, osb->s_feature_ro_compat);
245
246 out += snprintf(buf + out, len - out,
247 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
248 osb->s_mount_opt, osb->s_atime_quantum);
249
c3d38840
SM		 250 if (cconn) {
251 out += snprintf(buf + out, len - out,
252 "%10s => Stack: %s Name: %*s "
253 "Version: %d.%d\n", "Cluster",
254 (*osb->osb_cluster_stack == '\0' ?
255 "o2cb" : osb->osb_cluster_stack),
256 cconn->cc_namelen, cconn->cc_name,
257 cconn->cc_version.pv_major,
258 cconn->cc_version.pv_minor);
259 }
50397507
SM		 260
261 spin_lock(&osb->dc_task_lock);
262 out += snprintf(buf + out, len - out,
263 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
264 "WorkSeq: %lu\n", "DownCnvt",
c3d38840
SM		 265 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
266 osb->blocked_lock_count, osb->dc_wake_sequence,
267 osb->dc_work_sequence);
50397507
SM		 268 spin_unlock(&osb->dc_task_lock);
269
270 spin_lock(&osb->osb_lock);
271 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
272 "Recovery",
273 (osb->recovery_thread_task ?
274 task_pid_nr(osb->recovery_thread_task) : -1));
275 if (rm->rm_used == 0)
276 out += snprintf(buf + out, len - out, " None\n");
277 else {
278 for (i = 0; i < rm->rm_used; i++)
279 out += snprintf(buf + out, len - out, " %d",
280 rm->rm_entries[i]);
281 out += snprintf(buf + out, len - out, "\n");
282 }
283 spin_unlock(&osb->osb_lock);
284
285 out += snprintf(buf + out, len - out,
286 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
c3d38840
SM		 287 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
288 osb->osb_commit_interval,
50397507
SM		 289 atomic_read(&osb->needs_checkpoint));
290
291 out += snprintf(buf + out, len - out,
c3d38840 292 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
50397507 293 "Journal", osb->journal->j_state,
c3d38840
SM		 294 osb->journal->j_trans_id,
295 atomic_read(&osb->journal->j_num_trans));
50397507
SM		 296
297 out += snprintf(buf + out, len - out,
298 "%10s => GlobalAllocs: %d LocalAllocs: %d "
299 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
300 "Stats",
301 atomic_read(&osb->alloc_stats.bitmap_data),
302 atomic_read(&osb->alloc_stats.local_data),
303 atomic_read(&osb->alloc_stats.bg_allocs),
304 atomic_read(&osb->alloc_stats.moves),
305 atomic_read(&osb->alloc_stats.bg_extends));
306
307 out += snprintf(buf + out, len - out,
308 "%10s => State: %u Descriptor: %llu Size: %u bits "
309 "Default: %u bits\n",
310 "LocalAlloc", osb->local_alloc_state,
311 (unsigned long long)osb->la_last_gd,
312 osb->local_alloc_bits, osb->local_alloc_default_bits);
313
314 spin_lock(&osb->osb_lock);
315 out += snprintf(buf + out, len - out,
b89c5428
TY		 316 "%10s => InodeSlot: %d StolenInodes: %d, "
317 "MetaSlot: %d StolenMeta: %d\n", "Steal",
50397507 318 osb->s_inode_steal_slot,
b89c5428
TY		 319 atomic_read(&osb->s_num_inodes_stolen),
320 osb->s_meta_steal_slot,
321 atomic_read(&osb->s_num_meta_stolen));
50397507
SM		 322 spin_unlock(&osb->osb_lock);
323
df152c24
SM		 324 out += snprintf(buf + out, len - out, "OrphanScan => ");
325 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
326 os->os_count, os->os_seqno);
327 out += snprintf(buf + out, len - out, " Last Scan: ");
328 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
329 out += snprintf(buf + out, len - out, "Disabled\n");
330 else
331 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
332 (get_seconds() - os->os_scantime.tv_sec));
333
50397507
SM		 334 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
335 "Slots", "Num", "RecoGen");
50397507
SM		 336 for (i = 0; i < osb->max_slots; ++i) {
337 out += snprintf(buf + out, len - out,
338 "%10s %c %3d %10d\n",
339 " ",
340 (i == osb->slot_num ? '*' : ' '),
341 i, osb->slot_recovery_generations[i]);
342 }
343
344 return out;
345}
346
347static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
348{
349 struct ocfs2_super *osb = inode->i_private;
350 char *buf = NULL;
351
352 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
353 if (!buf)
354 goto bail;
355
356 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
357
358 file->private_data = buf;
359
360 return 0;
361bail:
362 return -ENOMEM;
363}
364
365static int ocfs2_debug_release(struct inode *inode, struct file *file)
366{
367 kfree(file->private_data);
368 return 0;
369}
370
371static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
372 size_t nbytes, loff_t *ppos)
373{
374 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
375 i_size_read(file->f_mapping->host));
376}
377#else
378static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
379{
380 return 0;
381}
382static int ocfs2_debug_release(struct inode *inode, struct file *file)
383{
384 return 0;
385}
386static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
387 size_t nbytes, loff_t *ppos)
388{
389 return 0;
390}
391#endif /* CONFIG_DEBUG_FS */
392
828c0950 393static const struct file_operations ocfs2_osb_debug_fops = {
50397507
SM		 394 .open = ocfs2_osb_debug_open,
395 .release = ocfs2_debug_release,
396 .read = ocfs2_debug_read,
397 .llseek = generic_file_llseek,
398};
399
ccd979bd
MF		 400static int ocfs2_sync_fs(struct super_block *sb, int wait)
401{
bddb8eb3 402 int status;
ccd979bd
MF		 403 tid_t target;
404 struct ocfs2_super *osb = OCFS2_SB(sb);
405
ccd979bd
MF		 406 if (ocfs2_is_hard_readonly(osb))
407 return -EROFS;
408
409 if (wait) {
410 status = ocfs2_flush_truncate_log(osb);
411 if (status < 0)
412 mlog_errno(status);
413 } else {
414 ocfs2_schedule_truncate_log_flush(osb, 0);
415 }
416
2b4e30fb
JB		 417 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
418 &target)) {
ccd979bd 419 if (wait)
2b4e30fb
JB		 420 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
421 target);
ccd979bd
MF		 422 }
423 return 0;
424}
425
1a224ad1
JK		 426static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
427{
428 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
429 && (ino == USER_QUOTA_SYSTEM_INODE
430 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
431 return 0;
432 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
433 && (ino == GROUP_QUOTA_SYSTEM_INODE
434 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
435 return 0;
436 return 1;
437}
438
ccd979bd
MF		 439static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
440{
441 struct inode *new = NULL;
442 int status = 0;
443 int i;
444
445 mlog_entry_void();
446
5fa0613e 447 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 448 if (IS_ERR(new)) {
449 status = PTR_ERR(new);
450 mlog_errno(status);
451 goto bail;
452 }
453 osb->root_inode = new;
454
5fa0613e 455 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 456 if (IS_ERR(new)) {
457 status = PTR_ERR(new);
458 mlog_errno(status);
459 goto bail;
460 }
461 osb->sys_root_inode = new;
462
463 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
464 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
1a224ad1
JK		 465 if (!ocfs2_need_system_inode(osb, i))
466 continue;
ccd979bd
MF		 467 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
468 if (!new) {
469 ocfs2_release_system_inodes(osb);
470 status = -EINVAL;
471 mlog_errno(status);
472 /* FIXME: Should ERROR_RO_FS */
473 mlog(ML_ERROR, "Unable to load system inode %d, "
474 "possibly corrupt fs?", i);
475 goto bail;
476 }
477 // the array now has one ref, so drop this one
478 iput(new);
479 }
480
481bail:
482 mlog_exit(status);
483 return status;
484}
485
486static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
487{
488 struct inode *new = NULL;
489 int status = 0;
490 int i;
491
492 mlog_entry_void();
493
494 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
495 i < NUM_SYSTEM_INODES;
496 i++) {
1a224ad1
JK		 497 if (!ocfs2_need_system_inode(osb, i))
498 continue;
ccd979bd
MF		 499 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
500 if (!new) {
501 ocfs2_release_system_inodes(osb);
502 status = -EINVAL;
503 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
504 status, i, osb->slot_num);
505 goto bail;
506 }
507 /* the array now has one ref, so drop this one */
508 iput(new);
509 }
510
511bail:
512 mlog_exit(status);
513 return status;
514}
515
bddb8eb3 516static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
ccd979bd 517{
bddb8eb3 518 int i;
ccd979bd
MF		 519 struct inode *inode;
520
521 mlog_entry_void();
522
b4d693fc
TM		 523 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
524 inode = osb->global_system_inodes[i];
ccd979bd
MF		 525 if (inode) {
526 iput(inode);
b4d693fc 527 osb->global_system_inodes[i] = NULL;
ccd979bd
MF		 528 }
529 }
530
531 inode = osb->sys_root_inode;
532 if (inode) {
533 iput(inode);
534 osb->sys_root_inode = NULL;
535 }
536
537 inode = osb->root_inode;
538 if (inode) {
539 iput(inode);
540 osb->root_inode = NULL;
541 }
542
b4d693fc
TM		 543 if (!osb->local_system_inodes)
544 goto out;
545
546 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
547 if (osb->local_system_inodes[i]) {
548 iput(osb->local_system_inodes[i]);
549 osb->local_system_inodes[i] = NULL;
550 }
551 }
552
553 kfree(osb->local_system_inodes);
554 osb->local_system_inodes = NULL;
555
556out:
bddb8eb3 557 mlog_exit(0);
ccd979bd
MF		 558}
559
560/* We're allocating fs objects, use GFP_NOFS */
561static struct inode *ocfs2_alloc_inode(struct super_block *sb)
562{
563 struct ocfs2_inode_info *oi;
564
e6b4f8da 565 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 566 if (!oi)
567 return NULL;
568
2b4e30fb 569 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
ccd979bd
MF		 570 return &oi->vfs_inode;
571}
572
573static void ocfs2_destroy_inode(struct inode *inode)
574{
575 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
576}
577
5a254031
MF		 578static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
579 unsigned int cbits)
ccd979bd 580{
5a254031
MF		 581 unsigned int bytes = 1 << cbits;
582 unsigned int trim = bytes;
583 unsigned int bitshift = 32;
584
585 /*
586 * i_size and all block offsets in ocfs2 are always 64 bits
587 * wide. i_clusters is 32 bits, in cluster-sized units. So on
588 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 589 */
590
591#if BITS_PER_LONG == 32
90c699a9 592# if defined(CONFIG_LBDAF)
2ecd05ae 593 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 594 /*
595 * We might be limited by page cache size.
596 */
597 if (bytes > PAGE_CACHE_SIZE) {
598 bytes = PAGE_CACHE_SIZE;
599 trim = 1;
600 /*
601 * Shift by 31 here so that we don't get larger than
602 * MAX_LFS_FILESIZE
603 */
604 bitshift = 31;
605 }
ccd979bd 606# else
5a254031
MF		 607 /*
608 * We are limited by the size of sector_t. Use block size, as
609 * that's what we expose to the VFS.
610 */
611 bytes = 1 << bbits;
612 trim = 1;
613 bitshift = 31;
ccd979bd
MF		 614# endif
615#endif
616
5a254031
MF		 617 /*
618 * Trim by a whole cluster when we can actually approach the
619 * on-disk limits. Otherwise we can overflow i_clusters when
620 * an extent start is at the max offset.
621 */
622 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 623}
624
625static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
626{
627 int incompat_features;
628 int ret = 0;
c0123ade 629 struct mount_options parsed_options;
ccd979bd 630 struct ocfs2_super *osb = OCFS2_SB(sb);
2c442719 631 u32 tmp;
ccd979bd 632
5297aad8
JK		 633 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
634 !ocfs2_check_set_options(sb, &parsed_options)) {
ccd979bd
MF		 635 ret = -EINVAL;
636 goto out;
637 }
638
2c442719
SM		 639 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
640 OCFS2_MOUNT_HB_NONE;
641 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
ccd979bd
MF		 642 ret = -EINVAL;
643 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
644 goto out;
645 }
646
647 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 648 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 649 ret = -EINVAL;
650 mlog(ML_ERROR, "Cannot change data mode on remount\n");
651 goto out;
652 }
653
12462f1d
JB		 654 /* Probably don't want this on remount; it might
655 * mess with other nodes */
656 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
657 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
658 ret = -EINVAL;
659 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
660 goto out;
661 }
662
ccd979bd
MF		 663 /* We're going to/from readonly mode. */
664 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
19ece546
JK		 665 /* Disable quota accounting before remounting RO */
666 if (*flags & MS_RDONLY) {
667 ret = ocfs2_susp_quotas(osb, 0);
668 if (ret < 0)
669 goto out;
670 }
ccd979bd
MF		 671 /* Lock here so the check of HARD_RO and the potential
672 * setting of SOFT_RO is atomic. */
673 spin_lock(&osb->osb_lock);
674 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
675 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
676 ret = -EROFS;
677 goto unlock_osb;
678 }
679
680 if (*flags & MS_RDONLY) {
681 mlog(0, "Going to ro mode.\n");
682 sb->s_flags |= MS_RDONLY;
683 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
684 } else {
685 mlog(0, "Making ro filesystem writeable.\n");
686
687 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
688 mlog(ML_ERROR, "Cannot remount RDWR "
689 "filesystem due to previous errors.\n");
690 ret = -EROFS;
691 goto unlock_osb;
692 }
693 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
694 if (incompat_features) {
695 mlog(ML_ERROR, "Cannot remount RDWR because "
696 "of unsupported optional features "
697 "(%x).\n", incompat_features);
698 ret = -EINVAL;
699 goto unlock_osb;
700 }
701 sb->s_flags &= ~MS_RDONLY;
702 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
703 }
704unlock_osb:
705 spin_unlock(&osb->osb_lock);
19ece546
JK		 706 /* Enable quota accounting after remounting RW */
707 if (!ret && !(*flags & MS_RDONLY)) {
708 if (sb_any_quota_suspended(sb))
709 ret = ocfs2_susp_quotas(osb, 1);
710 else
711 ret = ocfs2_enable_quotas(osb);
712 if (ret < 0) {
713 /* Return back changes... */
714 spin_lock(&osb->osb_lock);
715 sb->s_flags |= MS_RDONLY;
716 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
717 spin_unlock(&osb->osb_lock);
718 goto out;
719 }
720 }
ccd979bd
MF		 721 }
722
723 if (!ret) {
ccd979bd
MF		 724 /* Only save off the new mount options in case of a successful
725 * remount. */
c0123ade
TY		 726 osb->s_mount_opt = parsed_options.mount_opt;
727 osb->s_atime_quantum = parsed_options.atime_quantum;
728 osb->preferred_slot = parsed_options.slot;
d147b3d6
MF		 729 if (parsed_options.commit_interval)
730 osb->osb_commit_interval = parsed_options.commit_interval;
e001e796
MF		 731
732 if (!ocfs2_is_hard_readonly(osb))
733 ocfs2_set_journal_params(osb);
57b09bb5
JK		 734
735 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
736 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
737 MS_POSIXACL : 0);
ccd979bd
MF		 738 }
739out:
740 return ret;
741}
742
743static int ocfs2_sb_probe(struct super_block *sb,
744 struct buffer_head **bh,
73be192b
JB		 745 int *sector_size,
746 struct ocfs2_blockcheck_stats *stats)
ccd979bd 747{
bddb8eb3 748 int status, tmpstat;
ccd979bd
MF		 749 struct ocfs1_vol_disk_hdr *hdr;
750 struct ocfs2_dinode *di;
751 int blksize;
752
753 *bh = NULL;
754
755 /* may be > 512 */
e1defc4f 756 *sector_size = bdev_logical_block_size(sb->s_bdev);
ccd979bd
MF		 757 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
758 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
759 *sector_size, OCFS2_MAX_BLOCKSIZE);
760 status = -EINVAL;
761 goto bail;
762 }
763
764 /* Can this really happen? */
765 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
766 *sector_size = OCFS2_MIN_BLOCKSIZE;
767
768 /* check block zero for old format */
769 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
770 if (status < 0) {
771 mlog_errno(status);
772 goto bail;
773 }
774 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
775 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
776 mlog(ML_ERROR, "incompatible version: %u.%u\n",
777 hdr->major_version, hdr->minor_version);
778 status = -EINVAL;
779 }
780 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
781 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
782 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
783 hdr->signature);
784 status = -EINVAL;
785 }
786 brelse(*bh);
787 *bh = NULL;
788 if (status < 0) {
789 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
790 "upgraded before mounting with ocfs v2\n");
791 goto bail;
792 }
793
794 /*
795 * Now check at magic offset for 512, 1024, 2048, 4096
796 * blocksizes. 4096 is the maximum blocksize because it is
797 * the minimum clustersize.
798 */
799 status = -EINVAL;
800 for (blksize = *sector_size;
801 blksize <= OCFS2_MAX_BLOCKSIZE;
802 blksize <<= 1) {
803 tmpstat = ocfs2_get_sector(sb, bh,
804 OCFS2_SUPER_BLOCK_BLKNO,
805 blksize);
806 if (tmpstat < 0) {
807 status = tmpstat;
808 mlog_errno(status);
fb5cbe9e 809 break;
ccd979bd
MF		 810 }
811 di = (struct ocfs2_dinode *) (*bh)->b_data;
73be192b 812 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
1c1d9793 813 spin_lock_init(&stats->b_lock);
fb5cbe9e
JB		 814 tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
815 if (tmpstat < 0) {
816 brelse(*bh);
817 *bh = NULL;
818 }
819 if (tmpstat != -EAGAIN) {
820 status = tmpstat;
ccd979bd 821 break;
fb5cbe9e 822 }
ccd979bd
MF		 823 }
824
825bail:
826 return status;
827}
828
c271c5c2
SM		 829static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
830{
2c442719
SM		 831 u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
832
833 if (osb->s_mount_opt & hb_enabled) {
834 if (ocfs2_mount_local(osb)) {
c271c5c2
SM		 835 mlog(ML_ERROR, "Cannot heartbeat on a locally "
836 "mounted device.\n");
837 return -EINVAL;
838 }
2c442719 839 if (ocfs2_userspace_stack(osb)) {
b61817e1
JB		 840 mlog(ML_ERROR, "Userspace stack expected, but "
841 "o2cb heartbeat arguments passed to mount\n");
842 return -EINVAL;
843 }
2c442719
SM		 844 if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
845 !ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
846 ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
847 ocfs2_cluster_o2cb_global_heartbeat(osb))) {
848 mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
849 return -EINVAL;
850 }
b61817e1
JB		 851 }
852
2c442719 853 if (!(osb->s_mount_opt & hb_enabled)) {
b61817e1
JB		 854 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
855 !ocfs2_userspace_stack(osb)) {
c271c5c2
SM		 856 mlog(ML_ERROR, "Heartbeat has to be started to mount "
857 "a read-write clustered device.\n");
858 return -EINVAL;
859 }
860 }
861
862 return 0;
863}
864
b61817e1
JB		 865/*
866 * If we're using a userspace stack, mount should have passed
867 * a name that matches the disk. If not, mount should not
868 * have passed a stack.
869 */
870static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
871 struct mount_options *mopt)
872{
873 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
874 mlog(ML_ERROR,
875 "cluster stack passed to mount, but this filesystem "
876 "does not support it\n");
877 return -EINVAL;
878 }
879
880 if (ocfs2_userspace_stack(osb) &&
881 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
882 OCFS2_STACK_LABEL_LEN)) {
883 mlog(ML_ERROR,
884 "cluster stack passed to mount (\"%s\") does not "
885 "match the filesystem (\"%s\")\n",
886 mopt->cluster_stack,
887 osb->osb_cluster_stack);
888 return -EINVAL;
889 }
890
891 return 0;
892}
893
19ece546
JK		 894static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
895{
896 int type;
897 struct super_block *sb = osb->sb;
898 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
899 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
900 int status = 0;
901
902 for (type = 0; type < MAXQUOTAS; type++) {
903 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
904 continue;
905 if (unsuspend)
0f0dd62f 906 status = dquot_resume(sb, type);
eea7feb0
JK		 907 else {
908 struct ocfs2_mem_dqinfo *oinfo;
909
910 /* Cancel periodic syncing before suspending */
911 oinfo = sb_dqinfo(sb, type)->dqi_priv;
912 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
0f0dd62f 913 status = dquot_suspend(sb, type);
eea7feb0 914 }
19ece546
JK		 915 if (status < 0)
916 break;
917 }
918 if (status < 0)
919 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
920 "remount (error = %d).\n", status);
921 return status;
922}
923
924static int ocfs2_enable_quotas(struct ocfs2_super *osb)
925{
926 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
927 struct super_block *sb = osb->sb;
928 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
929 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
930 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
931 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
932 int status;
933 int type;
934
935 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
936 for (type = 0; type < MAXQUOTAS; type++) {
937 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
938 continue;
939 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
940 osb->slot_num);
941 if (!inode[type]) {
942 status = -ENOENT;
943 goto out_quota_off;
944 }
287a8095
CH		 945 status = dquot_enable(inode[type], type, QFMT_OCFS2,
946 DQUOT_USAGE_ENABLED);
19ece546
JK		 947 if (status < 0)
948 goto out_quota_off;
949 }
950
951 for (type = 0; type < MAXQUOTAS; type++)
952 iput(inode[type]);
953 return 0;
954out_quota_off:
955 ocfs2_disable_quotas(osb);
956 for (type = 0; type < MAXQUOTAS; type++)
957 iput(inode[type]);
958 mlog_errno(status);
959 return status;
960}
961
962static void ocfs2_disable_quotas(struct ocfs2_super *osb)
963{
964 int type;
965 struct inode *inode;
966 struct super_block *sb = osb->sb;
c06bcbfa 967 struct ocfs2_mem_dqinfo *oinfo;
19ece546
JK		 968
969 /* We mostly ignore errors in this function because there's not much
970 * we can do when we see them */
971 for (type = 0; type < MAXQUOTAS; type++) {
972 if (!sb_has_quota_loaded(sb, type))
973 continue;
c06bcbfa
JK		 974 /* Cancel periodic syncing before we grab dqonoff_mutex */
975 oinfo = sb_dqinfo(sb, type)->dqi_priv;
976 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
19ece546
JK		 977 inode = igrab(sb->s_dquot.files[type]);
978 /* Turn off quotas. This will remove all dquot structures from
979 * memory and so they will be automatically synced to global
980 * quota files */
0f0dd62f
CH		 981 dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
982 DQUOT_LIMITS_ENABLED);
19ece546
JK		 983 if (!inode)
984 continue;
985 iput(inode);
986 }
987}
988
989/* Handle quota on quotactl */
990static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
307ae18a 991 char *path)
19ece546
JK		 992{
993 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
994 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
995
996 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
997 return -EINVAL;
998
287a8095
CH		 999 return dquot_enable(sb_dqopt(sb)->files[type], type,
1000 format_id, DQUOT_LIMITS_ENABLED);
19ece546
JK		 1001}
1002
1003/* Handle quota off quotactl */
307ae18a 1004static int ocfs2_quota_off(struct super_block *sb, int type)
19ece546 1005{
0f0dd62f 1006 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
19ece546
JK		 1007}
1008
0d54b217 1009static const struct quotactl_ops ocfs2_quotactl_ops = {
19ece546
JK		 1010 .quota_on = ocfs2_quota_on,
1011 .quota_off = ocfs2_quota_off,
287a8095
CH		 1012 .quota_sync = dquot_quota_sync,
1013 .get_info = dquot_get_dqinfo,
1014 .set_info = dquot_set_dqinfo,
1015 .get_dqblk = dquot_get_dqblk,
1016 .set_dqblk = dquot_set_dqblk,
19ece546
JK		 1017};
1018
ccd979bd
MF		 1019static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1020{
1021 struct dentry *root;
1022 int status, sector_size;
c0123ade 1023 struct mount_options parsed_options;
ccd979bd
MF		 1024 struct inode *inode = NULL;
1025 struct ocfs2_super *osb = NULL;
1026 struct buffer_head *bh = NULL;
c271c5c2 1027 char nodestr[8];
73be192b 1028 struct ocfs2_blockcheck_stats stats;
ccd979bd
MF		 1029
1030 mlog_entry("%p, %p, %i", sb, data, silent);
1031
c0123ade 1032 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 1033 status = -EINVAL;
1034 goto read_super_error;
1035 }
1036
1037 /* probe for superblock */
73be192b 1038 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
ccd979bd
MF		 1039 if (status < 0) {
1040 mlog(ML_ERROR, "superblock probe failed!\n");
1041 goto read_super_error;
1042 }
1043
73be192b 1044 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
ccd979bd
MF		 1045 osb = OCFS2_SB(sb);
1046 if (status < 0) {
1047 mlog_errno(status);
1048 goto read_super_error;
1049 }
1050 brelse(bh);
1051 bh = NULL;
a68979b8 1052
5297aad8
JK		 1053 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1054 status = -EINVAL;
1055 goto read_super_error;
1056 }
c0123ade
TY		 1057 osb->s_mount_opt = parsed_options.mount_opt;
1058 osb->s_atime_quantum = parsed_options.atime_quantum;
1059 osb->preferred_slot = parsed_options.slot;
d147b3d6 1060 osb->osb_commit_interval = parsed_options.commit_interval;
73c8a800
MF		 1061
1062 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
d02f00cc 1063 osb->osb_resv_level = parsed_options.resv_level;
83f92318
MF		 1064 osb->osb_dir_resv_level = parsed_options.resv_level;
1065 if (parsed_options.dir_resv_level == -1)
1066 osb->osb_dir_resv_level = parsed_options.resv_level;
1067 else
1068 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
ccd979bd 1069
b61817e1
JB		 1070 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1071 if (status)
1072 goto read_super_error;
1073
ccd979bd
MF		 1074 sb->s_magic = OCFS2_SUPER_MAGIC;
1075
a68979b8
TY		 1076 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1077 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1078
ccd979bd
MF		 1079 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1080 * heartbeat=none */
1081 if (bdev_read_only(sb->s_bdev)) {
1082 if (!(sb->s_flags & MS_RDONLY)) {
1083 status = -EACCES;
1084 mlog(ML_ERROR, "Readonly device detected but readonly "
1085 "mount was not specified.\n");
1086 goto read_super_error;
1087 }
1088
1089 /* You should not be able to start a local heartbeat
1090 * on a readonly device. */
1091 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1092 status = -EROFS;
1093 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1094 "device.\n");
1095 goto read_super_error;
1096 }
1097
1098 status = ocfs2_check_journals_nolocks(osb);
1099 if (status < 0) {
1100 if (status == -EROFS)
1101 mlog(ML_ERROR, "Recovery required on readonly "
1102 "file system, but write access is "
1103 "unavailable.\n");
1104 else
2bd63216 1105 mlog_errno(status);
ccd979bd
MF		 1106 goto read_super_error;
1107 }
1108
1109 ocfs2_set_ro_flag(osb, 1);
1110
1111 printk(KERN_NOTICE "Readonly device detected. No cluster "
1112 "services will be utilized for this mount. Recovery "
1113 "will be skipped.\n");
1114 }
1115
1116 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 1117 if (sb->s_flags & MS_RDONLY)
1118 ocfs2_set_ro_flag(osb, 0);
1119 }
1120
c271c5c2
SM		 1121 status = ocfs2_verify_heartbeat(osb);
1122 if (status < 0) {
1123 mlog_errno(status);
1124 goto read_super_error;
1125 }
1126
ccd979bd
MF		 1127 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1128 ocfs2_debugfs_root);
1129 if (!osb->osb_debug_root) {
1130 status = -EINVAL;
1131 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1132 goto read_super_error;
1133 }
1134
50397507
SM		 1135 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1136 osb->osb_debug_root,
1137 osb,
1138 &ocfs2_osb_debug_fops);
1139 if (!osb->osb_ctxt) {
1140 status = -EINVAL;
1141 mlog_errno(status);
1142 goto read_super_error;
1143 }
1144
73be192b
JB		 1145 if (ocfs2_meta_ecc(osb)) {
1146 status = ocfs2_blockcheck_stats_debugfs_install(
1147 &osb->osb_ecc_stats,
1148 osb->osb_debug_root);
1149 if (status) {
1150 mlog(ML_ERROR,
1151 "Unable to create blockcheck statistics "
1152 "files\n");
1153 goto read_super_error;
1154 }
1155 }
1156
ccd979bd
MF		 1157 status = ocfs2_mount_volume(sb);
1158 if (osb->root_inode)
1159 inode = igrab(osb->root_inode);
1160
1161 if (status < 0)
1162 goto read_super_error;
1163
1164 if (!inode) {
1165 status = -EIO;
1166 mlog_errno(status);
1167 goto read_super_error;
1168 }
1169
1170 root = d_alloc_root(inode);
1171 if (!root) {
1172 status = -ENOMEM;
1173 mlog_errno(status);
1174 goto read_super_error;
1175 }
1176
1177 sb->s_root = root;
1178
1179 ocfs2_complete_mount_recovery(osb);
1180
c271c5c2
SM		 1181 if (ocfs2_mount_local(osb))
1182 snprintf(nodestr, sizeof(nodestr), "local");
1183 else
19fdb624 1184 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1185
1186 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 1187 "with %s data mode.\n",
c271c5c2 1188 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 1189 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1190 "ordered");
1191
1192 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1193 wake_up(&osb->osb_mount_event);
1194
19ece546
JK		 1195 /* Now we can initialize quotas because we can afford to wait
1196 * for cluster locks recovery now. That also means that truncation
1197 * log recovery can happen but that waits for proper quota setup */
1198 if (!(sb->s_flags & MS_RDONLY)) {
1199 status = ocfs2_enable_quotas(osb);
1200 if (status < 0) {
1201 /* We have to err-out specially here because
1202 * s_root is already set */
1203 mlog_errno(status);
1204 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1205 wake_up(&osb->osb_mount_event);
1206 mlog_exit(status);
1207 return status;
1208 }
1209 }
1210
1211 ocfs2_complete_quota_recovery(osb);
1212
1213 /* Now we wake up again for processes waiting for quotas */
1214 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1215 wake_up(&osb->osb_mount_event);
1216
df152c24 1217 /* Start this when the mount is almost sure of being successful */
8b712cd5 1218 ocfs2_orphan_scan_start(osb);
df152c24 1219
ccd979bd
MF		 1220 mlog_exit(status);
1221 return status;
1222
1223read_super_error:
a81cb88b 1224 brelse(bh);
ccd979bd
MF		 1225
1226 if (inode)
1227 iput(inode);
1228
1229 if (osb) {
1230 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1231 wake_up(&osb->osb_mount_event);
1232 ocfs2_dismount_volume(sb, 1);
1233 }
1234
1235 mlog_exit(status);
1236 return status;
1237}
1238
152a0836 1239static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
454e2398
DH		 1240 int flags,
1241 const char *dev_name,
152a0836 1242 void *data)
ccd979bd 1243{
152a0836 1244 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
ccd979bd
MF		 1245}
1246
f7b1aa69
JK		 1247static void ocfs2_kill_sb(struct super_block *sb)
1248{
1249 struct ocfs2_super *osb = OCFS2_SB(sb);
1250
5fd13189
JK		 1251 /* Failed mount? */
1252 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1253 goto out;
1254
f7b1aa69
JK		 1255 /* Prevent further queueing of inode drop events */
1256 spin_lock(&dentry_list_lock);
1257 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1258 spin_unlock(&dentry_list_lock);
1259 /* Wait for work to finish and/or remove it */
1260 cancel_work_sync(&osb->dentry_lock_work);
5fd13189 1261out:
f7b1aa69
JK		 1262 kill_block_super(sb);
1263}
1264
ccd979bd
MF		 1265static struct file_system_type ocfs2_fs_type = {
1266 .owner = THIS_MODULE,
1267 .name = "ocfs2",
152a0836 1268 .mount = ocfs2_mount,
f7b1aa69
JK		 1269 .kill_sb = ocfs2_kill_sb,
1270
1ba9da2f 1271 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 1272 .next = NULL
1273};
1274
5297aad8
JK		 1275static int ocfs2_check_set_options(struct super_block *sb,
1276 struct mount_options *options)
1277{
1278 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1279 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1280 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1281 mlog(ML_ERROR, "User quotas were requested, but this "
1282 "filesystem does not have the feature enabled.\n");
1283 return 0;
1284 }
1285 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1286 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1287 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1288 mlog(ML_ERROR, "Group quotas were requested, but this "
1289 "filesystem does not have the feature enabled.\n");
1290 return 0;
1291 }
1292 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1293 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1294 mlog(ML_ERROR, "ACL support requested but extended attributes "
1295 "feature is not enabled\n");
1296 return 0;
1297 }
1298 /* No ACL setting specified? Use XATTR feature... */
1299 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1300 OCFS2_MOUNT_NO_POSIX_ACL))) {
1301 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1302 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1303 else
1304 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1305 }
1306 return 1;
1307}
1308
ccd979bd
MF		 1309static int ocfs2_parse_options(struct super_block *sb,
1310 char *options,
c0123ade 1311 struct mount_options *mopt,
ccd979bd
MF		 1312 int is_remount)
1313{
1314 int status;
1315 char *p;
2c442719 1316 u32 tmp;
ccd979bd
MF		 1317
1318 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1319 options ? options : "(none)");
1320
d147b3d6 1321 mopt->commit_interval = 0;
4b37fcb7 1322 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
c0123ade
TY		 1323 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1324 mopt->slot = OCFS2_INVALID_SLOT;
73c8a800 1325 mopt->localalloc_opt = -1;
b61817e1 1326 mopt->cluster_stack[0] = '\0';
d02f00cc 1327 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
83f92318 1328 mopt->dir_resv_level = -1;
ccd979bd
MF		 1329
1330 if (!options) {
1331 status = 1;
1332 goto bail;
1333 }
1334
1335 while ((p = strsep(&options, ",")) != NULL) {
1336 int token, option;
1337 substring_t args[MAX_OPT_ARGS];
1338
1339 if (!*p)
1340 continue;
1341
1342 token = match_token(p, tokens, args);
1343 switch (token) {
1344 case Opt_hb_local:
c0123ade 1345 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 1346 break;
1347 case Opt_hb_none:
2c442719
SM		 1348 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1349 break;
1350 case Opt_hb_global:
1351 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
ccd979bd
MF		 1352 break;
1353 case Opt_barrier:
1354 if (match_int(&args[0], &option)) {
1355 status = 0;
1356 goto bail;
1357 }
1358 if (option)
c0123ade 1359 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 1360 else
c0123ade 1361 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 1362 break;
1363 case Opt_intr:
c0123ade 1364 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1365 break;
1366 case Opt_nointr:
c0123ade 1367 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1368 break;
1369 case Opt_err_panic:
c0123ade 1370 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1371 break;
1372 case Opt_err_ro:
c0123ade 1373 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1374 break;
1375 case Opt_data_ordered:
c0123ade 1376 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 1377 break;
1378 case Opt_data_writeback:
c0123ade 1379 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 1380 break;
cf1d6c76
TY		 1381 case Opt_user_xattr:
1382 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1383 break;
1384 case Opt_nouser_xattr:
1385 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1386 break;
7f1a37e3
TY		 1387 case Opt_atime_quantum:
1388 if (match_int(&args[0], &option)) {
1389 status = 0;
1390 goto bail;
1391 }
1392 if (option >= 0)
c0123ade 1393 mopt->atime_quantum = option;
7f1a37e3 1394 break;
baf4661a
SM		 1395 case Opt_slot:
1396 option = 0;
1397 if (match_int(&args[0], &option)) {
1398 status = 0;
1399 goto bail;
1400 }
1401 if (option)
c0123ade 1402 mopt->slot = (s16)option;
baf4661a 1403 break;
d147b3d6
MF		 1404 case Opt_commit:
1405 option = 0;
1406 if (match_int(&args[0], &option)) {
1407 status = 0;
1408 goto bail;
1409 }
1410 if (option < 0)
1411 return 0;
1412 if (option == 0)
2b4e30fb 1413 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
d147b3d6
MF		 1414 mopt->commit_interval = HZ * option;
1415 break;
2fbe8d1e
SM		 1416 case Opt_localalloc:
1417 option = 0;
1418 if (match_int(&args[0], &option)) {
1419 status = 0;
1420 goto bail;
1421 }
73c8a800 1422 if (option >= 0)
2fbe8d1e
SM		 1423 mopt->localalloc_opt = option;
1424 break;
53fc622b
MF		 1425 case Opt_localflocks:
1426 /*
1427 * Changing this during remount could race
1428 * flock() requests, or "unbalance" existing
1429 * ones (e.g., a lock is taken in one mode but
1430 * dropped in the other). If users care enough
1431 * to flip locking modes during remount, we
1432 * could add a "local" flag to individual
1433 * flock structures for proper tracking of
1434 * state.
1435 */
1436 if (!is_remount)
1437 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1438 break;
b61817e1
JB		 1439 case Opt_stack:
1440 /* Check both that the option we were passed
1441 * is of the right length and that it is a proper
1442 * string of the right length.
1443 */
1444 if (((args[0].to - args[0].from) !=
1445 OCFS2_STACK_LABEL_LEN) ||
1446 (strnlen(args[0].from,
1447 OCFS2_STACK_LABEL_LEN) !=
1448 OCFS2_STACK_LABEL_LEN)) {
1449 mlog(ML_ERROR,
1450 "Invalid cluster_stack option\n");
1451 status = 0;
1452 goto bail;
1453 }
1454 memcpy(mopt->cluster_stack, args[0].from,
1455 OCFS2_STACK_LABEL_LEN);
1456 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1457 break;
12462f1d
JB		 1458 case Opt_inode64:
1459 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1460 break;
19ece546 1461 case Opt_usrquota:
19ece546
JK		 1462 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1463 break;
1464 case Opt_grpquota:
19ece546
JK		 1465 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1466 break;
7bdb0d18
TY		 1467 case Opt_coherency_buffered:
1468 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1469 break;
1470 case Opt_coherency_full:
1471 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1472 break;
a68979b8
TY		 1473 case Opt_acl:
1474 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
5297aad8 1475 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
a68979b8
TY		 1476 break;
1477 case Opt_noacl:
5297aad8 1478 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
a68979b8
TY		 1479 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1480 break;
d02f00cc
MF		 1481 case Opt_resv_level:
1482 if (is_remount)
1483 break;
1484 if (match_int(&args[0], &option)) {
1485 status = 0;
1486 goto bail;
1487 }
1488 if (option >= OCFS2_MIN_RESV_LEVEL &&
1489 option < OCFS2_MAX_RESV_LEVEL)
1490 mopt->resv_level = option;
1491 break;
83f92318
MF		 1492 case Opt_dir_resv_level:
1493 if (is_remount)
1494 break;
1495 if (match_int(&args[0], &option)) {
1496 status = 0;
1497 goto bail;
1498 }
1499 if (option >= OCFS2_MIN_RESV_LEVEL &&
1500 option < OCFS2_MAX_RESV_LEVEL)
1501 mopt->dir_resv_level = option;
1502 break;
ccd979bd
MF		 1503 default:
1504 mlog(ML_ERROR,
1505 "Unrecognized mount option \"%s\" "
1506 "or missing value\n", p);
1507 status = 0;
1508 goto bail;
1509 }
1510 }
1511
2c442719
SM		 1512 /* Ensure only one heartbeat mode */
1513 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
1514 OCFS2_MOUNT_HB_NONE);
1515 if (hweight32(tmp) != 1) {
1516 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1517 status = 0;
1518 goto bail;
1519 }
1520
ccd979bd
MF		 1521 status = 1;
1522
1523bail:
1524 mlog_exit(status);
1525 return status;
1526}
1527
d550071c
SM		 1528static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1529{
1530 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1531 unsigned long opts = osb->s_mount_opt;
ebcee4b5 1532 unsigned int local_alloc_megs;
d550071c 1533
2c442719
SM		 1534 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1535 seq_printf(s, ",_netdev");
1536 if (opts & OCFS2_MOUNT_HB_LOCAL)
1537 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1538 else
1539 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1540 } else
1541 seq_printf(s, ",%s", OCFS2_HB_NONE);
d550071c
SM		 1542
1543 if (opts & OCFS2_MOUNT_NOINTR)
1544 seq_printf(s, ",nointr");
1545
1546 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1547 seq_printf(s, ",data=writeback");
1548 else
1549 seq_printf(s, ",data=ordered");
1550
1551 if (opts & OCFS2_MOUNT_BARRIER)
1552 seq_printf(s, ",barrier=1");
1553
1554 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1555 seq_printf(s, ",errors=panic");
1556 else
1557 seq_printf(s, ",errors=remount-ro");
1558
1559 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1560 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1561
1562 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1563 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1564
d147b3d6
MF		 1565 if (osb->osb_commit_interval)
1566 seq_printf(s, ",commit=%u",
1567 (unsigned) (osb->osb_commit_interval / HZ));
1568
ebcee4b5 1569 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
6b82021b 1570 if (local_alloc_megs != ocfs2_la_default_mb(osb))
ebcee4b5 1571 seq_printf(s, ",localalloc=%d", local_alloc_megs);
2fbe8d1e 1572
53fc622b
MF		 1573 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1574 seq_printf(s, ",localflocks,");
1575
b61817e1
JB		 1576 if (osb->osb_cluster_stack[0])
1577 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1578 osb->osb_cluster_stack);
19ece546
JK		 1579 if (opts & OCFS2_MOUNT_USRQUOTA)
1580 seq_printf(s, ",usrquota");
1581 if (opts & OCFS2_MOUNT_GRPQUOTA)
1582 seq_printf(s, ",grpquota");
b61817e1 1583
7bdb0d18
TY		 1584 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1585 seq_printf(s, ",coherency=buffered");
1586 else
1587 seq_printf(s, ",coherency=full");
1588
b0f73cfc
SM		 1589 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1590 seq_printf(s, ",nouser_xattr");
1591 else
1592 seq_printf(s, ",user_xattr");
1593
12462f1d
JB		 1594 if (opts & OCFS2_MOUNT_INODE64)
1595 seq_printf(s, ",inode64");
1596
a68979b8
TY		 1597 if (opts & OCFS2_MOUNT_POSIX_ACL)
1598 seq_printf(s, ",acl");
1599 else
1600 seq_printf(s, ",noacl");
a68979b8 1601
d02f00cc
MF		 1602 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1603 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1604
83f92318
MF		 1605 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1606 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1607
d550071c
SM		 1608 return 0;
1609}
1610
ccd979bd
MF		 1611static int __init ocfs2_init(void)
1612{
1613 int status;
1614
1615 mlog_entry_void();
1616
1617 ocfs2_print_version();
1618
ccd979bd
MF		 1619 status = init_ocfs2_uptodate_cache();
1620 if (status < 0) {
1621 mlog_errno(status);
1622 goto leave;
1623 }
1624
1625 status = ocfs2_initialize_mem_caches();
1626 if (status < 0) {
1627 mlog_errno(status);
1628 goto leave;
1629 }
1630
1631 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1632 if (!ocfs2_wq) {
1633 status = -ENOMEM;
1634 goto leave;
1635 }
1636
ccd979bd
MF		 1637 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1638 if (!ocfs2_debugfs_root) {
1639 status = -EFAULT;
1640 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1641 }
1642
171bf93c
MF		 1643 status = ocfs2_quota_setup();
1644 if (status)
1645 goto leave;
1646
63e0c48a
JB		 1647 ocfs2_set_locking_protocol();
1648
9e33d69f 1649 status = register_quota_format(&ocfs2_quota_format);
ccd979bd
MF		 1650leave:
1651 if (status < 0) {
171bf93c 1652 ocfs2_quota_shutdown();
ccd979bd
MF		 1653 ocfs2_free_mem_caches();
1654 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 1655 }
1656
1657 mlog_exit(status);
1658
1659 if (status >= 0) {
1660 return register_filesystem(&ocfs2_fs_type);
1661 } else
1662 return -1;
1663}
1664
1665static void __exit ocfs2_exit(void)
1666{
1667 mlog_entry_void();
1668
171bf93c
MF		 1669 ocfs2_quota_shutdown();
1670
ccd979bd
MF		 1671 if (ocfs2_wq) {
1672 flush_workqueue(ocfs2_wq);
1673 destroy_workqueue(ocfs2_wq);
1674 }
1675
9e33d69f
JK		 1676 unregister_quota_format(&ocfs2_quota_format);
1677
ccd979bd
MF		 1678 debugfs_remove(ocfs2_debugfs_root);
1679
1680 ocfs2_free_mem_caches();
1681
1682 unregister_filesystem(&ocfs2_fs_type);
1683
ccd979bd
MF		 1684 exit_ocfs2_uptodate_cache();
1685
1686 mlog_exit_void();
1687}
1688
1689static void ocfs2_put_super(struct super_block *sb)
1690{
1691 mlog_entry("(0x%p)\n", sb);
1692
1693 ocfs2_sync_blockdev(sb);
1694 ocfs2_dismount_volume(sb, 0);
1695
1696 mlog_exit_void();
1697}
1698
726c3342 1699static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 1700{
1701 struct ocfs2_super *osb;
1702 u32 numbits, freebits;
1703 int status;
1704 struct ocfs2_dinode *bm_lock;
1705 struct buffer_head *bh = NULL;
1706 struct inode *inode = NULL;
1707
726c3342 1708 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
ccd979bd 1709
726c3342 1710 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 1711
1712 inode = ocfs2_get_system_file_inode(osb,
1713 GLOBAL_BITMAP_SYSTEM_INODE,
1714 OCFS2_INVALID_SLOT);
1715 if (!inode) {
1716 mlog(ML_ERROR, "failed to get bitmap inode\n");
1717 status = -EIO;
1718 goto bail;
1719 }
1720
e63aecb6 1721 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1722 if (status < 0) {
1723 mlog_errno(status);
1724 goto bail;
1725 }
1726
1727 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1728
1729 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1730 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1731
1732 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1733 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1734 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1735 buf->f_blocks = ((sector_t) numbits) *
1736 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1737 buf->f_bfree = ((sector_t) freebits) *
1738 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1739 buf->f_bavail = buf->f_bfree;
1740 buf->f_files = numbits;
1741 buf->f_ffree = freebits;
837711f8
CL		 1742 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1743 & 0xFFFFFFFFUL;
1744 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1745 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
ccd979bd
MF		 1746
1747 brelse(bh);
1748
e63aecb6 1749 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1750 status = 0;
1751bail:
1752 if (inode)
1753 iput(inode);
1754
1755 mlog_exit(status);
1756
1757 return status;
1758}
1759
51cc5068 1760static void ocfs2_inode_init_once(void *data)
ccd979bd
MF		 1761{
1762 struct ocfs2_inode_info *oi = data;
1763
a35afb83
CL		 1764 oi->ip_flags = 0;
1765 oi->ip_open_count = 0;
1766 spin_lock_init(&oi->ip_lock);
1767 ocfs2_extent_map_init(&oi->vfs_inode);
1768 INIT_LIST_HEAD(&oi->ip_io_markers);
a35afb83 1769 oi->ip_dir_start_lookup = 0;
ccd979bd 1770
a35afb83 1771 init_rwsem(&oi->ip_alloc_sem);
cf1d6c76 1772 init_rwsem(&oi->ip_xattr_sem);
a35afb83 1773 mutex_init(&oi->ip_io_mutex);
ccd979bd 1774
a35afb83
CL		 1775 oi->ip_blkno = 0ULL;
1776 oi->ip_clusters = 0;
ccd979bd 1777
4fe370af
MF		 1778 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1779
a35afb83 1780 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1781 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1782 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1783
8cb471e8 1784 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
6e5a3d75 1785 &ocfs2_inode_caching_ops);
ccd979bd 1786
a35afb83 1787 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1788}
1789
1790static int ocfs2_initialize_mem_caches(void)
1791{
1792 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1793 sizeof(struct ocfs2_inode_info),
1794 0,
1795 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1796 SLAB_MEM_SPREAD),
20c2df83 1797 ocfs2_inode_init_once);
9e33d69f
JK		 1798 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1799 sizeof(struct ocfs2_dquot),
1800 0,
1801 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1802 SLAB_MEM_SPREAD),
1803 NULL);
1804 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1805 sizeof(struct ocfs2_quota_chunk),
1806 0,
1807 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1808 NULL);
1809 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1810 !ocfs2_qf_chunk_cachep) {
1811 if (ocfs2_inode_cachep)
1812 kmem_cache_destroy(ocfs2_inode_cachep);
1813 if (ocfs2_dquot_cachep)
1814 kmem_cache_destroy(ocfs2_dquot_cachep);
1815 if (ocfs2_qf_chunk_cachep)
1816 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
ccd979bd 1817 return -ENOMEM;
9e33d69f 1818 }
ccd979bd 1819
ccd979bd
MF		 1820 return 0;
1821}
1822
1823static void ocfs2_free_mem_caches(void)
1824{
1825 if (ocfs2_inode_cachep)
1826 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd 1827 ocfs2_inode_cachep = NULL;
9e33d69f
JK		 1828
1829 if (ocfs2_dquot_cachep)
1830 kmem_cache_destroy(ocfs2_dquot_cachep);
1831 ocfs2_dquot_cachep = NULL;
1832
1833 if (ocfs2_qf_chunk_cachep)
1834 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1835 ocfs2_qf_chunk_cachep = NULL;
ccd979bd
MF		 1836}
1837
1838static int ocfs2_get_sector(struct super_block *sb,
1839 struct buffer_head **bh,
1840 int block,
1841 int sect_size)
1842{
1843 if (!sb_set_blocksize(sb, sect_size)) {
1844 mlog(ML_ERROR, "unable to set blocksize\n");
1845 return -EIO;
1846 }
1847
1848 *bh = sb_getblk(sb, block);
1849 if (!*bh) {
1850 mlog_errno(-EIO);
1851 return -EIO;
1852 }
1853 lock_buffer(*bh);
1854 if (!buffer_dirty(*bh))
1855 clear_buffer_uptodate(*bh);
1856 unlock_buffer(*bh);
1857 ll_rw_block(READ, 1, bh);
1858 wait_on_buffer(*bh);
28d57d43 1859 if (!buffer_uptodate(*bh)) {
1860 mlog_errno(-EIO);
1861 brelse(*bh);
1862 *bh = NULL;
1863 return -EIO;
1864 }
1865
ccd979bd
MF		 1866 return 0;
1867}
1868
ccd979bd
MF		 1869static int ocfs2_mount_volume(struct super_block *sb)
1870{
1871 int status = 0;
1872 int unlock_super = 0;
1873 struct ocfs2_super *osb = OCFS2_SB(sb);
1874
1875 mlog_entry_void();
1876
1877 if (ocfs2_is_hard_readonly(osb))
1878 goto leave;
1879
ccd979bd
MF		 1880 status = ocfs2_dlm_init(osb);
1881 if (status < 0) {
1882 mlog_errno(status);
1883 goto leave;
1884 }
1885
ccd979bd
MF		 1886 status = ocfs2_super_lock(osb, 1);
1887 if (status < 0) {
1888 mlog_errno(status);
1889 goto leave;
1890 }
1891 unlock_super = 1;
1892
1893 /* This will load up the node map and add ourselves to it. */
1894 status = ocfs2_find_slot(osb);
1895 if (status < 0) {
1896 mlog_errno(status);
1897 goto leave;
1898 }
1899
ccd979bd
MF		 1900 /* load all node-local system inodes */
1901 status = ocfs2_init_local_system_inodes(osb);
1902 if (status < 0) {
1903 mlog_errno(status);
1904 goto leave;
1905 }
1906
1907 status = ocfs2_check_volume(osb);
1908 if (status < 0) {
1909 mlog_errno(status);
1910 goto leave;
1911 }
1912
1913 status = ocfs2_truncate_log_init(osb);
06c59bb8 1914 if (status < 0)
ccd979bd 1915 mlog_errno(status);
c271c5c2 1916
ccd979bd
MF		 1917leave:
1918 if (unlock_super)
1919 ocfs2_super_unlock(osb, 1);
1920
1921 mlog_exit(status);
1922 return status;
1923}
1924
ccd979bd
MF		 1925static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1926{
286eaa95 1927 int tmp, hangup_needed = 0;
ccd979bd 1928 struct ocfs2_super *osb = NULL;
c271c5c2 1929 char nodestr[8];
ccd979bd
MF		 1930
1931 mlog_entry("(0x%p)\n", sb);
1932
1933 BUG_ON(!sb);
1934 osb = OCFS2_SB(sb);
1935 BUG_ON(!osb);
1936
50397507
SM		 1937 debugfs_remove(osb->osb_ctxt);
1938
f7b1aa69
JK		 1939 /*
1940 * Flush inode dropping work queue so that deletes are
1941 * performed while the filesystem is still working
1942 */
1943 ocfs2_drop_all_dl_inodes(osb);
1944
692684e1
SM		 1945 /* Orphan scan should be stopped as early as possible */
1946 ocfs2_orphan_scan_stop(osb);
1947
19ece546
JK		 1948 ocfs2_disable_quotas(osb);
1949
ccd979bd
MF		 1950 ocfs2_shutdown_local_alloc(osb);
1951
1952 ocfs2_truncate_log_shutdown(osb);
1953
553abd04
JB		 1954 /* This will disable recovery and flush any recovery work. */
1955 ocfs2_recovery_exit(osb);
ccd979bd
MF		 1956
1957 ocfs2_journal_shutdown(osb);
1958
1959 ocfs2_sync_blockdev(sb);
1960
374a263e
TM		 1961 ocfs2_purge_refcount_trees(osb);
1962
4670c46d
JB		 1963 /* No cluster connection means we've failed during mount, so skip
1964 * all the steps which depended on that to complete. */
1965 if (osb->cconn) {
ccd979bd
MF		 1966 tmp = ocfs2_super_lock(osb, 1);
1967 if (tmp < 0) {
1968 mlog_errno(tmp);
1969 return;
1970 }
19b613d4 1971 }
ccd979bd 1972
19b613d4
MF		 1973 if (osb->slot_num != OCFS2_INVALID_SLOT)
1974 ocfs2_put_slot(osb);
ccd979bd 1975
4670c46d 1976 if (osb->cconn)
ccd979bd 1977 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1978
1979 ocfs2_release_system_inodes(osb);
1980
6953b4c0 1981 /*
6953b4c0
JB		 1982 * If we're dismounting due to mount error, mount.ocfs2 will clean
1983 * up heartbeat. If we're a local mount, there is no heartbeat.
1984 * If we failed before we got a uuid_str yet, we can't stop
1985 * heartbeat. Otherwise, do it.
1986 */
1987 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
286eaa95
JB		 1988 hangup_needed = 1;
1989
1990 if (osb->cconn)
1991 ocfs2_dlm_shutdown(osb, hangup_needed);
1992
73be192b 1993 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
286eaa95
JB		 1994 debugfs_remove(osb->osb_debug_root);
1995
1996 if (hangup_needed)
6953b4c0 1997 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
ccd979bd
MF		 1998
1999 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
2000
c271c5c2
SM		 2001 if (ocfs2_mount_local(osb))
2002 snprintf(nodestr, sizeof(nodestr), "local");
2003 else
19fdb624 2004 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 2005
2006 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
2007 osb->dev_str, nodestr);
ccd979bd
MF		 2008
2009 ocfs2_delete_osb(osb);
2010 kfree(osb);
2011 sb->s_dev = 0;
2012 sb->s_fs_info = NULL;
2013}
2014
2015static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2016 unsigned uuid_bytes)
2017{
2018 int i, ret;
2019 char *ptr;
2020
2021 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2022
cd861280 2023 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 2024 if (osb->uuid_str == NULL)
2025 return -ENOMEM;
2026
ccd979bd
MF		 2027 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2028 /* print with null */
2029 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2030 if (ret != 2) /* drop super cleans up */
2031 return -EINVAL;
2032 /* then only advance past the last char */
2033 ptr += 2;
2034 }
2035
2036 return 0;
2037}
2038
3bdb8efd
PL		 2039/* Make sure entire volume is addressable by our journal. Requires
2040 osb_clusters_at_boot to be valid and for the journal to have been
2041 initialized by ocfs2_journal_init(). */
2042static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2043{
2044 int status = 0;
2045 u64 max_block =
2046 ocfs2_clusters_to_blocks(osb->sb,
2047 osb->osb_clusters_at_boot) - 1;
2048
2049 /* 32-bit block number is always OK. */
2050 if (max_block <= (u32)~0ULL)
2051 goto out;
2052
2053 /* Volume is "huge", so see if our journal is new enough to
2054 support it. */
2055 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2056 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2057 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2058 JBD2_FEATURE_INCOMPAT_64BIT))) {
2059 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2060 "Enable the 'block64' journal option with tunefs.ocfs2");
2061 status = -EFBIG;
2062 goto out;
2063 }
2064
2065 out:
2066 return status;
2067}
2068
ccd979bd
MF		 2069static int ocfs2_initialize_super(struct super_block *sb,
2070 struct buffer_head *bh,
73be192b
JB		 2071 int sector_size,
2072 struct ocfs2_blockcheck_stats *stats)
ccd979bd 2073{
bddb8eb3 2074 int status;
5a254031
MF		 2075 int i, cbits, bbits;
2076 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 2077 struct inode *inode = NULL;
ccd979bd
MF		 2078 struct ocfs2_journal *journal;
2079 __le32 uuid_net_key;
2080 struct ocfs2_super *osb;
3bdb8efd 2081 u64 total_blocks;
ccd979bd
MF		 2082
2083 mlog_entry_void();
2084
cd861280 2085 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 2086 if (!osb) {
2087 status = -ENOMEM;
2088 mlog_errno(status);
2089 goto bail;
2090 }
2091
2092 sb->s_fs_info = osb;
2093 sb->s_op = &ocfs2_sops;
2094 sb->s_export_op = &ocfs2_export_ops;
19ece546
JK		 2095 sb->s_qcop = &ocfs2_quotactl_ops;
2096 sb->dq_op = &ocfs2_quota_operations;
cf1d6c76 2097 sb->s_xattr = ocfs2_xattr_handlers;
e0dceaf0 2098 sb->s_time_gran = 1;
ccd979bd
MF		 2099 sb->s_flags |= MS_NOATIME;
2100 /* this is needed to support O_LARGEFILE */
5a254031
MF		 2101 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2102 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2103 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
ccd979bd 2104
9b7895ef
MF		 2105 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2106
2107 for (i = 0; i < 3; i++)
2108 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2109 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2110
ccd979bd
MF		 2111 osb->sb = sb;
2112 /* Save off for ocfs2_rw_direct */
2113 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 2114 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 2115
34d024f8
MF		 2116 spin_lock_init(&osb->dc_task_lock);
2117 init_waitqueue_head(&osb->dc_event);
2118 osb->dc_work_sequence = 0;
2119 osb->dc_wake_sequence = 0;
ccd979bd
MF		 2120 INIT_LIST_HEAD(&osb->blocked_lock_list);
2121 osb->blocked_lock_count = 0;
ccd979bd 2122 spin_lock_init(&osb->osb_lock);
c8b9cf9a 2123 spin_lock_init(&osb->osb_xattr_lock);
b89c5428 2124 ocfs2_init_steal_slots(osb);
ccd979bd
MF		 2125
2126 atomic_set(&osb->alloc_stats.moves, 0);
2127 atomic_set(&osb->alloc_stats.local_data, 0);
2128 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2129 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2130 atomic_set(&osb->alloc_stats.bg_extends, 0);
2131
73be192b
JB		 2132 /* Copy the blockcheck stats from the superblock probe */
2133 osb->osb_ecc_stats = *stats;
2134
ccd979bd
MF		 2135 ocfs2_init_node_maps(osb);
2136
2137 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2138 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2139
75d9bbc7
GR		 2140 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2141 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2142 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2143 osb->max_slots);
2144 status = -EINVAL;
2145 goto bail;
2146 }
2147 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
2148
8b712cd5
JM		 2149 ocfs2_orphan_scan_init(osb);
2150
553abd04
JB		 2151 status = ocfs2_recovery_init(osb);
2152 if (status) {
2153 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2154 mlog_errno(status);
2155 goto bail;
2156 }
ccd979bd
MF		 2157
2158 init_waitqueue_head(&osb->checkpoint_event);
2159 atomic_set(&osb->needs_checkpoint, 0);
2160
7f1a37e3
TY		 2161 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2162
ccd979bd
MF		 2163 osb->slot_num = OCFS2_INVALID_SLOT;
2164
8154da3d
TY		 2165 osb->s_xattr_inline_size = le16_to_cpu(
2166 di->id2.i_super.s_xattr_inline_size);
fdd77704 2167
ccd979bd
MF		 2168 osb->local_alloc_state = OCFS2_LA_UNUSED;
2169 osb->local_alloc_bh = NULL;
9c7af40b 2170 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
ccd979bd 2171
ccd979bd
MF		 2172 init_waitqueue_head(&osb->osb_mount_event);
2173
d02f00cc
MF		 2174 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2175 if (status) {
2176 mlog_errno(status);
2177 goto bail;
2178 }
2179
ccd979bd
MF		 2180 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2181 if (!osb->vol_label) {
2182 mlog(ML_ERROR, "unable to alloc vol label\n");
2183 status = -ENOMEM;
2184 goto bail;
2185 }
2186
539d8264
SM		 2187 osb->slot_recovery_generations =
2188 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2189 GFP_KERNEL);
2190 if (!osb->slot_recovery_generations) {
2191 status = -ENOMEM;
2192 mlog_errno(status);
2193 goto bail;
2194 }
2195
b4df6ed8
MF		 2196 init_waitqueue_head(&osb->osb_wipe_event);
2197 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2198 sizeof(*osb->osb_orphan_wipes),
2199 GFP_KERNEL);
2200 if (!osb->osb_orphan_wipes) {
2201 status = -ENOMEM;
2202 mlog_errno(status);
2203 goto bail;
2204 }
2205
374a263e
TM		 2206 osb->osb_rf_lock_tree = RB_ROOT;
2207
ccd979bd
MF		 2208 osb->s_feature_compat =
2209 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2210 osb->s_feature_ro_compat =
2211 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2212 osb->s_feature_incompat =
2213 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2214
2215 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2216 mlog(ML_ERROR, "couldn't mount because of unsupported "
2217 "optional features (%x).\n", i);
2218 status = -EINVAL;
2219 goto bail;
2220 }
2221 if (!(osb->sb->s_flags & MS_RDONLY) &&
2222 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2223 mlog(ML_ERROR, "couldn't mount RDWR because of "
2224 "unsupported optional features (%x).\n", i);
2225 status = -EINVAL;
2226 goto bail;
2227 }
2228
98f486f2
SM		 2229 if (ocfs2_clusterinfo_valid(osb)) {
2230 osb->osb_stackflags =
2231 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
b61817e1
JB		 2232 memcpy(osb->osb_cluster_stack,
2233 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2234 OCFS2_STACK_LABEL_LEN);
2235 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2236 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2237 mlog(ML_ERROR,
2238 "couldn't mount because of an invalid "
2239 "cluster stack label (%s) \n",
2240 osb->osb_cluster_stack);
2241 status = -EINVAL;
2242 goto bail;
2243 }
2244 } else {
2245 /* The empty string is identical with classic tools that
2246 * don't know about s_cluster_info. */
2247 osb->osb_cluster_stack[0] = '\0';
2248 }
2249
ccd979bd
MF		 2250 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2251
2252 /* FIXME
2253 * This should be done in ocfs2_journal_init(), but unknown
2254 * ordering issues will cause the filesystem to crash.
2255 * If anyone wants to figure out what part of the code
2256 * refers to osb->journal before ocfs2_journal_init() is run,
2257 * be my guest.
2258 */
2259 /* initialize our journal structure */
2260
cd861280 2261 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 2262 if (!journal) {
2263 mlog(ML_ERROR, "unable to alloc journal\n");
2264 status = -ENOMEM;
2265 goto bail;
2266 }
2267 osb->journal = journal;
2268 journal->j_osb = osb;
2269
2270 atomic_set(&journal->j_num_trans, 0);
2271 init_rwsem(&journal->j_trans_barrier);
2272 init_waitqueue_head(&journal->j_checkpointed);
2273 spin_lock_init(&journal->j_lock);
2274 journal->j_trans_id = (unsigned long) 1;
2275 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 2276 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 2277 journal->j_state = OCFS2_JOURNAL_FREE;
2278
ea455f8a
JK		 2279 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2280 osb->dentry_lock_list = NULL;
2281
ccd979bd
MF		 2282 /* get some pseudo constants for clustersize bits */
2283 osb->s_clustersize_bits =
2284 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2285 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2286 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2287
2288 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2289 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2290 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2291 osb->s_clustersize);
2292 status = -EINVAL;
2293 goto bail;
2294 }
2295
3bdb8efd
PL		 2296 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2297 le32_to_cpu(di->i_clusters));
2298
2299 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2300 total_blocks);
2301 if (status) {
2302 mlog(ML_ERROR, "Volume too large "
2303 "to mount safely on this system");
2304 status = -EFBIG;
ccd979bd
MF		 2305 goto bail;
2306 }
2307
2308 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2309 sizeof(di->id2.i_super.s_uuid))) {
2310 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2311 status = -ENOMEM;
2312 goto bail;
2313 }
2314
78427043 2315 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
ccd979bd
MF		 2316
2317 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2318 osb->vol_label[63] = '\0';
2319 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2320 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2321 osb->first_cluster_group_blkno =
2322 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2323 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
cf1d6c76 2324 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
ccd979bd
MF		 2325 mlog(0, "vol_label: %s\n", osb->vol_label);
2326 mlog(0, "uuid: %s\n", osb->uuid_str);
b0697053
MF		 2327 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2328 (unsigned long long)osb->root_blkno,
2329 (unsigned long long)osb->system_dir_blkno);
ccd979bd
MF		 2330
2331 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2332 if (!osb->osb_dlm_debug) {
2333 status = -ENOMEM;
2334 mlog_errno(status);
2335 goto bail;
2336 }
2337
2338 atomic_set(&osb->vol_state, VOLUME_INIT);
2339
2340 /* load root, system_dir, and all global system inodes */
2341 status = ocfs2_init_global_system_inodes(osb);
2342 if (status < 0) {
2343 mlog_errno(status);
2344 goto bail;
2345 }
2346
2347 /*
2348 * global bitmap
2349 */
2350 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2351 OCFS2_INVALID_SLOT);
2352 if (!inode) {
2353 status = -EINVAL;
2354 mlog_errno(status);
2355 goto bail;
2356 }
2357
2358 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
6b82021b 2359 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
ccd979bd 2360 iput(inode);
ccd979bd 2361
8571882c
TM		 2362 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2363 osb->s_feature_incompat) * 8;
ccd979bd
MF		 2364
2365 status = ocfs2_init_slot_info(osb);
2366 if (status < 0) {
2367 mlog_errno(status);
2368 goto bail;
2369 }
2370
ccd979bd
MF		 2371bail:
2372 mlog_exit(status);
2373 return status;
2374}
2375
2376/*
2377 * will return: -EAGAIN if it is ok to keep searching for superblocks
2378 * -EINVAL if there is a bad superblock
2379 * 0 on success
2380 */
2381static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2382 struct buffer_head *bh,
73be192b
JB		 2383 u32 blksz,
2384 struct ocfs2_blockcheck_stats *stats)
ccd979bd
MF		 2385{
2386 int status = -EAGAIN;
2387
2388 mlog_entry_void();
2389
2390 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2391 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
d030cc97
JB		 2392 /* We have to do a raw check of the feature here */
2393 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2394 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2395 status = ocfs2_block_check_validate(bh->b_data,
2396 bh->b_size,
73be192b
JB		 2397 &di->i_check,
2398 stats);
d030cc97
JB		 2399 if (status)
2400 goto out;
2401 }
ccd979bd
MF		 2402 status = -EINVAL;
2403 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2404 mlog(ML_ERROR, "found superblock with incorrect block "
2405 "size: found %u, should be %u\n",
2406 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2407 blksz);
2408 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2409 OCFS2_MAJOR_REV_LEVEL ||
2410 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2411 OCFS2_MINOR_REV_LEVEL) {
2412 mlog(ML_ERROR, "found superblock with bad version: "
2413 "found %u.%u, should be %u.%u\n",
2414 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2415 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2416 OCFS2_MAJOR_REV_LEVEL,
2417 OCFS2_MINOR_REV_LEVEL);
2418 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2419 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 2420 "found %llu, should be %llu\n",
1ca1a111 2421 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 2422 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 2423 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2424 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2425 mlog(ML_ERROR, "bad cluster size found: %u\n",
2426 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2427 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2428 mlog(ML_ERROR, "bad root_blkno: 0\n");
2429 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2430 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2431 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2432 mlog(ML_ERROR,
2433 "Superblock slots found greater than file system "
2434 "maximum: found %u, max %u\n",
2435 le16_to_cpu(di->id2.i_super.s_max_slots),
2436 OCFS2_MAX_SLOTS);
2437 } else {
2438 /* found it! */
2439 status = 0;
2440 }
2441 }
2442
d030cc97 2443out:
ccd979bd
MF		 2444 mlog_exit(status);
2445 return status;
2446}
2447
2448static int ocfs2_check_volume(struct ocfs2_super *osb)
2449{
bddb8eb3 2450 int status;
ccd979bd 2451 int dirty;
c271c5c2 2452 int local;
ccd979bd
MF		 2453 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2454 * recover
2455 * ourselves. */
2456
2457 mlog_entry_void();
2458
2459 /* Init our journal object. */
2460 status = ocfs2_journal_init(osb->journal, &dirty);
2461 if (status < 0) {
2462 mlog(ML_ERROR, "Could not initialize journal!\n");
2463 goto finally;
2464 }
2465
3bdb8efd
PL		 2466 /* Now that journal has been initialized, check to make sure
2467 entire volume is addressable. */
2468 status = ocfs2_journal_addressable(osb);
2469 if (status)
2470 goto finally;
2471
ccd979bd
MF		 2472 /* If the journal was unmounted cleanly then we don't want to
2473 * recover anything. Otherwise, journal_load will do that
2474 * dirty work for us :) */
2475 if (!dirty) {
2476 status = ocfs2_journal_wipe(osb->journal, 0);
2477 if (status < 0) {
2478 mlog_errno(status);
2479 goto finally;
2480 }
2481 } else {
2482 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2483 "recovering volume.\n");
2484 }
2485
c271c5c2
SM		 2486 local = ocfs2_mount_local(osb);
2487
ccd979bd 2488 /* will play back anything left in the journal. */
539d8264 2489 status = ocfs2_journal_load(osb->journal, local, dirty);
01af4820
WW		 2490 if (status < 0) {
2491 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2492 goto finally;
2493 }
ccd979bd
MF		 2494
2495 if (dirty) {
2496 /* recover my local alloc if we didn't unmount cleanly. */
2497 status = ocfs2_begin_local_alloc_recovery(osb,
2498 osb->slot_num,
2499 &local_alloc);
2500 if (status < 0) {
2501 mlog_errno(status);
2502 goto finally;
2503 }
2504 /* we complete the recovery process after we've marked
2505 * ourselves as mounted. */
2506 }
2507
2508 mlog(0, "Journal loaded.\n");
2509
2510 status = ocfs2_load_local_alloc(osb);
2511 if (status < 0) {
2512 mlog_errno(status);
2513 goto finally;
2514 }
2515
2516 if (dirty) {
2517 /* Recovery will be completed after we've mounted the
2518 * rest of the volume. */
2519 osb->dirty = 1;
2520 osb->local_alloc_copy = local_alloc;
2521 local_alloc = NULL;
2522 }
2523
2524 /* go through each journal, trylock it and if you get the
2525 * lock, and it's marked as dirty, set the bit in the recover
2526 * map and launch a recovery thread for it. */
2527 status = ocfs2_mark_dead_nodes(osb);
9140db04
SE		 2528 if (status < 0) {
2529 mlog_errno(status);
2530 goto finally;
2531 }
2532
2533 status = ocfs2_compute_replay_slots(osb);
ccd979bd
MF		 2534 if (status < 0)
2535 mlog_errno(status);
2536
2537finally:
2538 if (local_alloc)
2539 kfree(local_alloc);
2540
2541 mlog_exit(status);
2542 return status;
2543}
2544
2545/*
2546 * The routine gets called from dismount or close whenever a dismount on
2547 * volume is requested and the osb open count becomes 1.
2548 * It will remove the osb from the global list and also free up all the
2549 * initialized resources and fileobject.
2550 */
2551static void ocfs2_delete_osb(struct ocfs2_super *osb)
2552{
2553 mlog_entry_void();
2554
2555 /* This function assumes that the caller has the main osb resource */
2556
8e8a4603 2557 ocfs2_free_slot_info(osb);
ccd979bd 2558
b4df6ed8 2559 kfree(osb->osb_orphan_wipes);
539d8264 2560 kfree(osb->slot_recovery_generations);
ccd979bd
MF		 2561 /* FIXME
2562 * This belongs in journal shutdown, but because we have to
421f91d2 2563 * allocate osb->journal at the start of ocfs2_initialize_osb(),
ccd979bd
MF		 2564 * we free it here.
2565 */
2566 kfree(osb->journal);
2567 if (osb->local_alloc_copy)
2568 kfree(osb->local_alloc_copy);
2569 kfree(osb->uuid_str);
2570 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2571 memset(osb, 0, sizeof(struct ocfs2_super));
2572
2573 mlog_exit_void();
2574}
2575
2576/* Put OCFS2 into a readonly state, or (if the user specifies it),
2577 * panic(). We do not support continue-on-error operation. */
2578static void ocfs2_handle_error(struct super_block *sb)
2579{
2580 struct ocfs2_super *osb = OCFS2_SB(sb);
2581
2582 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2583 panic("OCFS2: (device %s): panic forced after error\n",
2584 sb->s_id);
2585
2586 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2587
2588 if (sb->s_flags & MS_RDONLY &&
2589 (ocfs2_is_soft_readonly(osb) ||
2590 ocfs2_is_hard_readonly(osb)))
2591 return;
2592
2593 printk(KERN_CRIT "File system is now read-only due to the potential "
2594 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2595 "system is unmounted.\n");
2596 sb->s_flags |= MS_RDONLY;
2597 ocfs2_set_ro_flag(osb, 0);
2598}
2599
2600static char error_buf[1024];
2601
2602void __ocfs2_error(struct super_block *sb,
2603 const char *function,
2604 const char *fmt, ...)
2605{
2606 va_list args;
2607
2608 va_start(args, fmt);
4a6e617a 2609 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 2610 va_end(args);
2611
2612 /* Not using mlog here because we want to show the actual
2613 * function the error came from. */
2614 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2615 sb->s_id, function, error_buf);
2616
2617 ocfs2_handle_error(sb);
2618}
2619
2620/* Handle critical errors. This is intentionally more drastic than
2621 * ocfs2_handle_error, so we only use for things like journal errors,
2622 * etc. */
2623void __ocfs2_abort(struct super_block* sb,
2624 const char *function,
2625 const char *fmt, ...)
2626{
2627 va_list args;
2628
2629 va_start(args, fmt);
4a6e617a 2630 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 2631 va_end(args);
2632
2633 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2634 sb->s_id, function, error_buf);
2635
2636 /* We don't have the cluster support yet to go straight to
2637 * hard readonly in here. Until then, we want to keep
2638 * ocfs2_abort() so that we can at least mark critical
2639 * errors.
2640 *
2641 * TODO: This should abort the journal and alert other nodes
2642 * that our slot needs recovery. */
2643
2644 /* Force a panic(). This stinks, but it's better than letting
2645 * things continue without having a proper hard readonly
2646 * here. */
a2f2ddbf
SM		 2647 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2648 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 2649 ocfs2_handle_error(sb);
2650}
2651
e4b963f1
JB		 2652/*
2653 * Void signal blockers, because in-kernel sigprocmask() only fails
2654 * when SIG_* is wrong.
2655 */
2656void ocfs2_block_signals(sigset_t *oldset)
2657{
2658 int rc;
2659 sigset_t blocked;
2660
2661 sigfillset(&blocked);
2662 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2663 BUG_ON(rc);
2664}
2665
2666void ocfs2_unblock_signals(sigset_t *oldset)
2667{
2668 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2669 BUG_ON(rc);
2670}
2671
ccd979bd
MF		 2672module_init(ocfs2_init);
2673module_exit(ocfs2_exit);
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