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ocfs2: use proper little-endian bitops
[deliverable/linux.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>
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"
d030cc97 57#include "blockcheck.h"
ccd979bd
MF		 58#include "dlmglue.h"
59#include "export.h"
60#include "extent_map.h"
61#include "heartbeat.h"
62#include "inode.h"
63#include "journal.h"
64#include "localalloc.h"
65#include "namei.h"
66#include "slot_map.h"
67#include "super.h"
68#include "sysfile.h"
69#include "uptodate.h"
70#include "ver.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
e18b890b 78static struct kmem_cache *ocfs2_inode_cachep = NULL;
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
88static struct dentry *ocfs2_debugfs_root = NULL;
89
90MODULE_AUTHOR("Oracle");
91MODULE_LICENSE("GPL");
92
c0123ade
TY		 93struct mount_options
94{
d147b3d6 95 unsigned long commit_interval;
c0123ade
TY		 96 unsigned long mount_opt;
97 unsigned int atime_quantum;
98 signed short slot;
73c8a800 99 int localalloc_opt;
d02f00cc 100 unsigned int resv_level;
83f92318 101 int dir_resv_level;
b61817e1 102 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c0123ade
TY		 103};
104
ccd979bd 105static int ocfs2_parse_options(struct super_block *sb, char *options,
c0123ade 106 struct mount_options *mopt,
baf4661a 107 int is_remount);
5297aad8
JK		 108static int ocfs2_check_set_options(struct super_block *sb,
109 struct mount_options *options);
d550071c 110static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
ccd979bd
MF		 111static void ocfs2_put_super(struct super_block *sb);
112static int ocfs2_mount_volume(struct super_block *sb);
113static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
114static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
115static int ocfs2_initialize_mem_caches(void);
116static void ocfs2_free_mem_caches(void);
117static void ocfs2_delete_osb(struct ocfs2_super *osb);
118
726c3342 119static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
ccd979bd
MF		 120
121static int ocfs2_sync_fs(struct super_block *sb, int wait);
122
123static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
124static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
bddb8eb3 125static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
ccd979bd
MF		 126static int ocfs2_check_volume(struct ocfs2_super *osb);
127static int ocfs2_verify_volume(struct ocfs2_dinode *di,
128 struct buffer_head *bh,
73be192b
JB		 129 u32 sectsize,
130 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 131static int ocfs2_initialize_super(struct super_block *sb,
132 struct buffer_head *bh,
73be192b
JB		 133 int sector_size,
134 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 135static int ocfs2_get_sector(struct super_block *sb,
136 struct buffer_head **bh,
137 int block,
138 int sect_size);
ccd979bd
MF		 139static struct inode *ocfs2_alloc_inode(struct super_block *sb);
140static void ocfs2_destroy_inode(struct inode *inode);
19ece546
JK		 141static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
142static int ocfs2_enable_quotas(struct ocfs2_super *osb);
143static void ocfs2_disable_quotas(struct ocfs2_super *osb);
ccd979bd 144
ee9b6d61 145static const struct super_operations ocfs2_sops = {
ccd979bd
MF		 146 .statfs = ocfs2_statfs,
147 .alloc_inode = ocfs2_alloc_inode,
148 .destroy_inode = ocfs2_destroy_inode,
149 .drop_inode = ocfs2_drop_inode,
066d92dc 150 .evict_inode = ocfs2_evict_inode,
ccd979bd 151 .sync_fs = ocfs2_sync_fs,
ccd979bd
MF		 152 .put_super = ocfs2_put_super,
153 .remount_fs = ocfs2_remount,
d550071c 154 .show_options = ocfs2_show_options,
9e33d69f
JK		 155 .quota_read = ocfs2_quota_read,
156 .quota_write = ocfs2_quota_write,
ccd979bd
MF		 157};
158
159enum {
160 Opt_barrier,
161 Opt_err_panic,
162 Opt_err_ro,
163 Opt_intr,
164 Opt_nointr,
165 Opt_hb_none,
166 Opt_hb_local,
2c442719 167 Opt_hb_global,
ccd979bd
MF		 168 Opt_data_ordered,
169 Opt_data_writeback,
7f1a37e3 170 Opt_atime_quantum,
baf4661a 171 Opt_slot,
d147b3d6 172 Opt_commit,
2fbe8d1e 173 Opt_localalloc,
53fc622b 174 Opt_localflocks,
b61817e1 175 Opt_stack,
cf1d6c76
TY		 176 Opt_user_xattr,
177 Opt_nouser_xattr,
12462f1d 178 Opt_inode64,
a68979b8
TY		 179 Opt_acl,
180 Opt_noacl,
19ece546
JK		 181 Opt_usrquota,
182 Opt_grpquota,
7bdb0d18
TY		 183 Opt_coherency_buffered,
184 Opt_coherency_full,
d02f00cc 185 Opt_resv_level,
83f92318 186 Opt_dir_resv_level,
ccd979bd
MF		 187 Opt_err,
188};
189
a447c093 190static const match_table_t tokens = {
ccd979bd
MF		 191 {Opt_barrier, "barrier=%u"},
192 {Opt_err_panic, "errors=panic"},
193 {Opt_err_ro, "errors=remount-ro"},
194 {Opt_intr, "intr"},
195 {Opt_nointr, "nointr"},
196 {Opt_hb_none, OCFS2_HB_NONE},
197 {Opt_hb_local, OCFS2_HB_LOCAL},
2c442719 198 {Opt_hb_global, OCFS2_HB_GLOBAL},
ccd979bd
MF		 199 {Opt_data_ordered, "data=ordered"},
200 {Opt_data_writeback, "data=writeback"},
7f1a37e3 201 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 202 {Opt_slot, "preferred_slot=%u"},
d147b3d6 203 {Opt_commit, "commit=%u"},
2fbe8d1e 204 {Opt_localalloc, "localalloc=%d"},
53fc622b 205 {Opt_localflocks, "localflocks"},
b61817e1 206 {Opt_stack, "cluster_stack=%s"},
cf1d6c76
TY		 207 {Opt_user_xattr, "user_xattr"},
208 {Opt_nouser_xattr, "nouser_xattr"},
12462f1d 209 {Opt_inode64, "inode64"},
a68979b8
TY		 210 {Opt_acl, "acl"},
211 {Opt_noacl, "noacl"},
19ece546
JK		 212 {Opt_usrquota, "usrquota"},
213 {Opt_grpquota, "grpquota"},
7bdb0d18
TY		 214 {Opt_coherency_buffered, "coherency=buffered"},
215 {Opt_coherency_full, "coherency=full"},
d02f00cc 216 {Opt_resv_level, "resv_level=%u"},
83f92318 217 {Opt_dir_resv_level, "dir_resv_level=%u"},
ccd979bd
MF		 218 {Opt_err, NULL}
219};
220
50397507
SM		 221#ifdef CONFIG_DEBUG_FS
222static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
223{
50397507
SM		 224 struct ocfs2_cluster_connection *cconn = osb->cconn;
225 struct ocfs2_recovery_map *rm = osb->recovery_map;
df152c24
SM		 226 struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
227 int i, out = 0;
50397507
SM		 228
229 out += snprintf(buf + out, len - out,
230 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
231 "Device", osb->dev_str, osb->uuid_str,
232 osb->fs_generation, osb->vol_label);
233
234 out += snprintf(buf + out, len - out,
235 "%10s => State: %d Flags: 0x%lX\n", "Volume",
236 atomic_read(&osb->vol_state), osb->osb_flags);
237
238 out += snprintf(buf + out, len - out,
239 "%10s => Block: %lu Cluster: %d\n", "Sizes",
240 osb->sb->s_blocksize, osb->s_clustersize);
241
242 out += snprintf(buf + out, len - out,
243 "%10s => Compat: 0x%X Incompat: 0x%X "
244 "ROcompat: 0x%X\n",
245 "Features", osb->s_feature_compat,
246 osb->s_feature_incompat, osb->s_feature_ro_compat);
247
248 out += snprintf(buf + out, len - out,
249 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
250 osb->s_mount_opt, osb->s_atime_quantum);
251
c3d38840
SM		 252 if (cconn) {
253 out += snprintf(buf + out, len - out,
254 "%10s => Stack: %s Name: %*s "
255 "Version: %d.%d\n", "Cluster",
256 (*osb->osb_cluster_stack == '\0' ?
257 "o2cb" : osb->osb_cluster_stack),
258 cconn->cc_namelen, cconn->cc_name,
259 cconn->cc_version.pv_major,
260 cconn->cc_version.pv_minor);
261 }
50397507
SM		 262
263 spin_lock(&osb->dc_task_lock);
264 out += snprintf(buf + out, len - out,
265 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
266 "WorkSeq: %lu\n", "DownCnvt",
c3d38840
SM		 267 (osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
268 osb->blocked_lock_count, osb->dc_wake_sequence,
269 osb->dc_work_sequence);
50397507
SM		 270 spin_unlock(&osb->dc_task_lock);
271
272 spin_lock(&osb->osb_lock);
273 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
274 "Recovery",
275 (osb->recovery_thread_task ?
276 task_pid_nr(osb->recovery_thread_task) : -1));
277 if (rm->rm_used == 0)
278 out += snprintf(buf + out, len - out, " None\n");
279 else {
280 for (i = 0; i < rm->rm_used; i++)
281 out += snprintf(buf + out, len - out, " %d",
282 rm->rm_entries[i]);
283 out += snprintf(buf + out, len - out, "\n");
284 }
285 spin_unlock(&osb->osb_lock);
286
287 out += snprintf(buf + out, len - out,
288 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
c3d38840
SM		 289 (osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
290 osb->osb_commit_interval,
50397507
SM		 291 atomic_read(&osb->needs_checkpoint));
292
293 out += snprintf(buf + out, len - out,
c3d38840 294 "%10s => State: %d TxnId: %lu NumTxns: %d\n",
50397507 295 "Journal", osb->journal->j_state,
c3d38840
SM		 296 osb->journal->j_trans_id,
297 atomic_read(&osb->journal->j_num_trans));
50397507
SM		 298
299 out += snprintf(buf + out, len - out,
300 "%10s => GlobalAllocs: %d LocalAllocs: %d "
301 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
302 "Stats",
303 atomic_read(&osb->alloc_stats.bitmap_data),
304 atomic_read(&osb->alloc_stats.local_data),
305 atomic_read(&osb->alloc_stats.bg_allocs),
306 atomic_read(&osb->alloc_stats.moves),
307 atomic_read(&osb->alloc_stats.bg_extends));
308
309 out += snprintf(buf + out, len - out,
310 "%10s => State: %u Descriptor: %llu Size: %u bits "
311 "Default: %u bits\n",
312 "LocalAlloc", osb->local_alloc_state,
313 (unsigned long long)osb->la_last_gd,
314 osb->local_alloc_bits, osb->local_alloc_default_bits);
315
316 spin_lock(&osb->osb_lock);
317 out += snprintf(buf + out, len - out,
b89c5428
TY		 318 "%10s => InodeSlot: %d StolenInodes: %d, "
319 "MetaSlot: %d StolenMeta: %d\n", "Steal",
50397507 320 osb->s_inode_steal_slot,
b89c5428
TY		 321 atomic_read(&osb->s_num_inodes_stolen),
322 osb->s_meta_steal_slot,
323 atomic_read(&osb->s_num_meta_stolen));
50397507
SM		 324 spin_unlock(&osb->osb_lock);
325
df152c24
SM		 326 out += snprintf(buf + out, len - out, "OrphanScan => ");
327 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
328 os->os_count, os->os_seqno);
329 out += snprintf(buf + out, len - out, " Last Scan: ");
330 if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
331 out += snprintf(buf + out, len - out, "Disabled\n");
332 else
333 out += snprintf(buf + out, len - out, "%lu seconds ago\n",
334 (get_seconds() - os->os_scantime.tv_sec));
335
50397507
SM		 336 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
337 "Slots", "Num", "RecoGen");
50397507
SM		 338 for (i = 0; i < osb->max_slots; ++i) {
339 out += snprintf(buf + out, len - out,
340 "%10s %c %3d %10d\n",
341 " ",
342 (i == osb->slot_num ? '*' : ' '),
343 i, osb->slot_recovery_generations[i]);
344 }
345
346 return out;
347}
348
349static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
350{
351 struct ocfs2_super *osb = inode->i_private;
352 char *buf = NULL;
353
354 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
355 if (!buf)
356 goto bail;
357
358 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
359
360 file->private_data = buf;
361
362 return 0;
363bail:
364 return -ENOMEM;
365}
366
367static int ocfs2_debug_release(struct inode *inode, struct file *file)
368{
369 kfree(file->private_data);
370 return 0;
371}
372
373static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
374 size_t nbytes, loff_t *ppos)
375{
376 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
377 i_size_read(file->f_mapping->host));
378}
379#else
380static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
381{
382 return 0;
383}
384static int ocfs2_debug_release(struct inode *inode, struct file *file)
385{
386 return 0;
387}
388static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
389 size_t nbytes, loff_t *ppos)
390{
391 return 0;
392}
393#endif /* CONFIG_DEBUG_FS */
394
828c0950 395static const struct file_operations ocfs2_osb_debug_fops = {
50397507
SM		 396 .open = ocfs2_osb_debug_open,
397 .release = ocfs2_debug_release,
398 .read = ocfs2_debug_read,
399 .llseek = generic_file_llseek,
400};
401
ccd979bd
MF		 402static int ocfs2_sync_fs(struct super_block *sb, int wait)
403{
bddb8eb3 404 int status;
ccd979bd
MF		 405 tid_t target;
406 struct ocfs2_super *osb = OCFS2_SB(sb);
407
ccd979bd
MF		 408 if (ocfs2_is_hard_readonly(osb))
409 return -EROFS;
410
411 if (wait) {
412 status = ocfs2_flush_truncate_log(osb);
413 if (status < 0)
414 mlog_errno(status);
415 } else {
416 ocfs2_schedule_truncate_log_flush(osb, 0);
417 }
418
2b4e30fb
JB		 419 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
420 &target)) {
ccd979bd 421 if (wait)
2b4e30fb
JB		 422 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
423 target);
ccd979bd
MF		 424 }
425 return 0;
426}
427
1a224ad1
JK		 428static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
429{
430 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
431 && (ino == USER_QUOTA_SYSTEM_INODE
432 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
433 return 0;
434 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
435 && (ino == GROUP_QUOTA_SYSTEM_INODE
436 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
437 return 0;
438 return 1;
439}
440
ccd979bd
MF		 441static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
442{
443 struct inode *new = NULL;
444 int status = 0;
445 int i;
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:
c1e8d35e
TM		 482 if (status)
483 mlog_errno(status);
ccd979bd
MF		 484 return status;
485}
486
487static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
488{
489 struct inode *new = NULL;
490 int status = 0;
491 int i;
492
ccd979bd
MF		 493 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
494 i < NUM_SYSTEM_INODES;
495 i++) {
1a224ad1
JK		 496 if (!ocfs2_need_system_inode(osb, i))
497 continue;
ccd979bd
MF		 498 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
499 if (!new) {
500 ocfs2_release_system_inodes(osb);
501 status = -EINVAL;
502 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
503 status, i, osb->slot_num);
504 goto bail;
505 }
506 /* the array now has one ref, so drop this one */
507 iput(new);
508 }
509
510bail:
c1e8d35e
TM		 511 if (status)
512 mlog_errno(status);
ccd979bd
MF		 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
b4d693fc
TM		 521 for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
522 inode = osb->global_system_inodes[i];
ccd979bd
MF		 523 if (inode) {
524 iput(inode);
b4d693fc 525 osb->global_system_inodes[i] = NULL;
ccd979bd
MF		 526 }
527 }
528
529 inode = osb->sys_root_inode;
530 if (inode) {
531 iput(inode);
532 osb->sys_root_inode = NULL;
533 }
534
535 inode = osb->root_inode;
536 if (inode) {
537 iput(inode);
538 osb->root_inode = NULL;
539 }
540
b4d693fc 541 if (!osb->local_system_inodes)
c1e8d35e 542 return;
b4d693fc
TM		 543
544 for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
545 if (osb->local_system_inodes[i]) {
546 iput(osb->local_system_inodes[i]);
547 osb->local_system_inodes[i] = NULL;
548 }
549 }
550
551 kfree(osb->local_system_inodes);
552 osb->local_system_inodes = NULL;
ccd979bd
MF		 553}
554
555/* We're allocating fs objects, use GFP_NOFS */
556static struct inode *ocfs2_alloc_inode(struct super_block *sb)
557{
558 struct ocfs2_inode_info *oi;
559
e6b4f8da 560 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 561 if (!oi)
562 return NULL;
563
2b4e30fb 564 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
ccd979bd
MF		 565 return &oi->vfs_inode;
566}
567
fa0d7e3d 568static void ocfs2_i_callback(struct rcu_head *head)
ccd979bd 569{
fa0d7e3d
NP		 570 struct inode *inode = container_of(head, struct inode, i_rcu);
571 INIT_LIST_HEAD(&inode->i_dentry);
ccd979bd
MF		 572 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
573}
574
fa0d7e3d
NP		 575static void ocfs2_destroy_inode(struct inode *inode)
576{
577 call_rcu(&inode->i_rcu, ocfs2_i_callback);
578}
579
5a254031
MF		 580static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
581 unsigned int cbits)
ccd979bd 582{
5a254031
MF		 583 unsigned int bytes = 1 << cbits;
584 unsigned int trim = bytes;
585 unsigned int bitshift = 32;
586
587 /*
588 * i_size and all block offsets in ocfs2 are always 64 bits
589 * wide. i_clusters is 32 bits, in cluster-sized units. So on
590 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 591 */
592
593#if BITS_PER_LONG == 32
90c699a9 594# if defined(CONFIG_LBDAF)
2ecd05ae 595 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 596 /*
597 * We might be limited by page cache size.
598 */
599 if (bytes > PAGE_CACHE_SIZE) {
600 bytes = PAGE_CACHE_SIZE;
601 trim = 1;
602 /*
603 * Shift by 31 here so that we don't get larger than
604 * MAX_LFS_FILESIZE
605 */
606 bitshift = 31;
607 }
ccd979bd 608# else
5a254031
MF		 609 /*
610 * We are limited by the size of sector_t. Use block size, as
611 * that's what we expose to the VFS.
612 */
613 bytes = 1 << bbits;
614 trim = 1;
615 bitshift = 31;
ccd979bd
MF		 616# endif
617#endif
618
5a254031
MF		 619 /*
620 * Trim by a whole cluster when we can actually approach the
621 * on-disk limits. Otherwise we can overflow i_clusters when
622 * an extent start is at the max offset.
623 */
624 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 625}
626
627static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
628{
629 int incompat_features;
630 int ret = 0;
c0123ade 631 struct mount_options parsed_options;
ccd979bd 632 struct ocfs2_super *osb = OCFS2_SB(sb);
2c442719 633 u32 tmp;
ccd979bd 634
5297aad8
JK		 635 if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
636 !ocfs2_check_set_options(sb, &parsed_options)) {
ccd979bd
MF		 637 ret = -EINVAL;
638 goto out;
639 }
640
2c442719
SM		 641 tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
642 OCFS2_MOUNT_HB_NONE;
643 if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
ccd979bd
MF		 644 ret = -EINVAL;
645 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
646 goto out;
647 }
648
649 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 650 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 651 ret = -EINVAL;
652 mlog(ML_ERROR, "Cannot change data mode on remount\n");
653 goto out;
654 }
655
12462f1d
JB		 656 /* Probably don't want this on remount; it might
657 * mess with other nodes */
658 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
659 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
660 ret = -EINVAL;
661 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
662 goto out;
663 }
664
ccd979bd
MF		 665 /* We're going to/from readonly mode. */
666 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
19ece546
JK		 667 /* Disable quota accounting before remounting RO */
668 if (*flags & MS_RDONLY) {
669 ret = ocfs2_susp_quotas(osb, 0);
670 if (ret < 0)
671 goto out;
672 }
ccd979bd
MF		 673 /* Lock here so the check of HARD_RO and the potential
674 * setting of SOFT_RO is atomic. */
675 spin_lock(&osb->osb_lock);
676 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
677 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
678 ret = -EROFS;
679 goto unlock_osb;
680 }
681
682 if (*flags & MS_RDONLY) {
ccd979bd
MF		 683 sb->s_flags |= MS_RDONLY;
684 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
685 } else {
ccd979bd
MF		 686 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
687 mlog(ML_ERROR, "Cannot remount RDWR "
688 "filesystem due to previous errors.\n");
689 ret = -EROFS;
690 goto unlock_osb;
691 }
692 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
693 if (incompat_features) {
694 mlog(ML_ERROR, "Cannot remount RDWR because "
695 "of unsupported optional features "
696 "(%x).\n", incompat_features);
697 ret = -EINVAL;
698 goto unlock_osb;
699 }
700 sb->s_flags &= ~MS_RDONLY;
701 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
702 }
32a42d39 703 trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
ccd979bd
MF		 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 */
f00c9e44 990static int ocfs2_quota_on(struct super_block *sb, int type, int format_id)
19ece546
JK		 991{
992 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
993 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
994
995 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
996 return -EINVAL;
997
287a8095
CH		 998 return dquot_enable(sb_dqopt(sb)->files[type], type,
999 format_id, DQUOT_LIMITS_ENABLED);
19ece546
JK		 1000}
1001
1002/* Handle quota off quotactl */
307ae18a 1003static int ocfs2_quota_off(struct super_block *sb, int type)
19ece546 1004{
0f0dd62f 1005 return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
19ece546
JK		 1006}
1007
0d54b217 1008static const struct quotactl_ops ocfs2_quotactl_ops = {
f00c9e44 1009 .quota_on_meta = ocfs2_quota_on,
19ece546 1010 .quota_off = ocfs2_quota_off,
287a8095
CH		 1011 .quota_sync = dquot_quota_sync,
1012 .get_info = dquot_get_dqinfo,
1013 .set_info = dquot_set_dqinfo,
1014 .get_dqblk = dquot_get_dqblk,
1015 .set_dqblk = dquot_set_dqblk,
19ece546
JK		 1016};
1017
ccd979bd
MF		 1018static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
1019{
1020 struct dentry *root;
1021 int status, sector_size;
c0123ade 1022 struct mount_options parsed_options;
ccd979bd
MF		 1023 struct inode *inode = NULL;
1024 struct ocfs2_super *osb = NULL;
1025 struct buffer_head *bh = NULL;
c271c5c2 1026 char nodestr[8];
73be192b 1027 struct ocfs2_blockcheck_stats stats;
ccd979bd 1028
32a42d39 1029 trace_ocfs2_fill_super(sb, data, silent);
ccd979bd 1030
c0123ade 1031 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 1032 status = -EINVAL;
1033 goto read_super_error;
1034 }
1035
1036 /* probe for superblock */
73be192b 1037 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
ccd979bd
MF		 1038 if (status < 0) {
1039 mlog(ML_ERROR, "superblock probe failed!\n");
1040 goto read_super_error;
1041 }
1042
73be192b 1043 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
ccd979bd
MF		 1044 osb = OCFS2_SB(sb);
1045 if (status < 0) {
1046 mlog_errno(status);
1047 goto read_super_error;
1048 }
1049 brelse(bh);
1050 bh = NULL;
a68979b8 1051
5297aad8
JK		 1052 if (!ocfs2_check_set_options(sb, &parsed_options)) {
1053 status = -EINVAL;
1054 goto read_super_error;
1055 }
c0123ade
TY		 1056 osb->s_mount_opt = parsed_options.mount_opt;
1057 osb->s_atime_quantum = parsed_options.atime_quantum;
1058 osb->preferred_slot = parsed_options.slot;
d147b3d6 1059 osb->osb_commit_interval = parsed_options.commit_interval;
73c8a800
MF		 1060
1061 ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
d02f00cc 1062 osb->osb_resv_level = parsed_options.resv_level;
83f92318
MF		 1063 osb->osb_dir_resv_level = parsed_options.resv_level;
1064 if (parsed_options.dir_resv_level == -1)
1065 osb->osb_dir_resv_level = parsed_options.resv_level;
1066 else
1067 osb->osb_dir_resv_level = parsed_options.dir_resv_level;
ccd979bd 1068
b61817e1
JB		 1069 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1070 if (status)
1071 goto read_super_error;
1072
ccd979bd
MF		 1073 sb->s_magic = OCFS2_SUPER_MAGIC;
1074
a68979b8
TY		 1075 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1076 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1077
ccd979bd
MF		 1078 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1079 * heartbeat=none */
1080 if (bdev_read_only(sb->s_bdev)) {
1081 if (!(sb->s_flags & MS_RDONLY)) {
1082 status = -EACCES;
1083 mlog(ML_ERROR, "Readonly device detected but readonly "
1084 "mount was not specified.\n");
1085 goto read_super_error;
1086 }
1087
1088 /* You should not be able to start a local heartbeat
1089 * on a readonly device. */
1090 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1091 status = -EROFS;
1092 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1093 "device.\n");
1094 goto read_super_error;
1095 }
1096
1097 status = ocfs2_check_journals_nolocks(osb);
1098 if (status < 0) {
1099 if (status == -EROFS)
1100 mlog(ML_ERROR, "Recovery required on readonly "
1101 "file system, but write access is "
1102 "unavailable.\n");
1103 else
2bd63216 1104 mlog_errno(status);
ccd979bd
MF		 1105 goto read_super_error;
1106 }
1107
1108 ocfs2_set_ro_flag(osb, 1);
1109
1110 printk(KERN_NOTICE "Readonly device detected. No cluster "
1111 "services will be utilized for this mount. Recovery "
1112 "will be skipped.\n");
1113 }
1114
1115 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 1116 if (sb->s_flags & MS_RDONLY)
1117 ocfs2_set_ro_flag(osb, 0);
1118 }
1119
c271c5c2
SM		 1120 status = ocfs2_verify_heartbeat(osb);
1121 if (status < 0) {
1122 mlog_errno(status);
1123 goto read_super_error;
1124 }
1125
ccd979bd
MF		 1126 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1127 ocfs2_debugfs_root);
1128 if (!osb->osb_debug_root) {
1129 status = -EINVAL;
1130 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1131 goto read_super_error;
1132 }
1133
50397507
SM		 1134 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1135 osb->osb_debug_root,
1136 osb,
1137 &ocfs2_osb_debug_fops);
1138 if (!osb->osb_ctxt) {
1139 status = -EINVAL;
1140 mlog_errno(status);
1141 goto read_super_error;
1142 }
1143
73be192b
JB		 1144 if (ocfs2_meta_ecc(osb)) {
1145 status = ocfs2_blockcheck_stats_debugfs_install(
1146 &osb->osb_ecc_stats,
1147 osb->osb_debug_root);
1148 if (status) {
1149 mlog(ML_ERROR,
1150 "Unable to create blockcheck statistics "
1151 "files\n");
1152 goto read_super_error;
1153 }
1154 }
1155
ccd979bd
MF		 1156 status = ocfs2_mount_volume(sb);
1157 if (osb->root_inode)
1158 inode = igrab(osb->root_inode);
1159
1160 if (status < 0)
1161 goto read_super_error;
1162
1163 if (!inode) {
1164 status = -EIO;
1165 mlog_errno(status);
1166 goto read_super_error;
1167 }
1168
1169 root = d_alloc_root(inode);
1170 if (!root) {
1171 status = -ENOMEM;
1172 mlog_errno(status);
1173 goto read_super_error;
1174 }
1175
1176 sb->s_root = root;
1177
1178 ocfs2_complete_mount_recovery(osb);
1179
c271c5c2
SM		 1180 if (ocfs2_mount_local(osb))
1181 snprintf(nodestr, sizeof(nodestr), "local");
1182 else
19fdb624 1183 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1184
1185 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 1186 "with %s data mode.\n",
c271c5c2 1187 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 1188 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1189 "ordered");
1190
1191 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1192 wake_up(&osb->osb_mount_event);
1193
19ece546
JK		 1194 /* Now we can initialize quotas because we can afford to wait
1195 * for cluster locks recovery now. That also means that truncation
1196 * log recovery can happen but that waits for proper quota setup */
1197 if (!(sb->s_flags & MS_RDONLY)) {
1198 status = ocfs2_enable_quotas(osb);
1199 if (status < 0) {
1200 /* We have to err-out specially here because
1201 * s_root is already set */
1202 mlog_errno(status);
1203 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1204 wake_up(&osb->osb_mount_event);
19ece546
JK		 1205 return status;
1206 }
1207 }
1208
1209 ocfs2_complete_quota_recovery(osb);
1210
1211 /* Now we wake up again for processes waiting for quotas */
1212 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1213 wake_up(&osb->osb_mount_event);
1214
df152c24 1215 /* Start this when the mount is almost sure of being successful */
8b712cd5 1216 ocfs2_orphan_scan_start(osb);
df152c24 1217
ccd979bd
MF		 1218 return status;
1219
1220read_super_error:
a81cb88b 1221 brelse(bh);
ccd979bd
MF		 1222
1223 if (inode)
1224 iput(inode);
1225
1226 if (osb) {
1227 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1228 wake_up(&osb->osb_mount_event);
1229 ocfs2_dismount_volume(sb, 1);
1230 }
1231
c1e8d35e
TM		 1232 if (status)
1233 mlog_errno(status);
ccd979bd
MF		 1234 return status;
1235}
1236
152a0836 1237static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
454e2398
DH		 1238 int flags,
1239 const char *dev_name,
152a0836 1240 void *data)
ccd979bd 1241{
152a0836 1242 return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
ccd979bd
MF		 1243}
1244
f7b1aa69
JK		 1245static void ocfs2_kill_sb(struct super_block *sb)
1246{
1247 struct ocfs2_super *osb = OCFS2_SB(sb);
1248
5fd13189
JK		 1249 /* Failed mount? */
1250 if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED)
1251 goto out;
1252
f7b1aa69
JK		 1253 /* Prevent further queueing of inode drop events */
1254 spin_lock(&dentry_list_lock);
1255 ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED);
1256 spin_unlock(&dentry_list_lock);
1257 /* Wait for work to finish and/or remove it */
1258 cancel_work_sync(&osb->dentry_lock_work);
5fd13189 1259out:
f7b1aa69
JK		 1260 kill_block_super(sb);
1261}
1262
ccd979bd
MF		 1263static struct file_system_type ocfs2_fs_type = {
1264 .owner = THIS_MODULE,
1265 .name = "ocfs2",
152a0836 1266 .mount = ocfs2_mount,
f7b1aa69
JK		 1267 .kill_sb = ocfs2_kill_sb,
1268
1ba9da2f 1269 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 1270 .next = NULL
1271};
1272
5297aad8
JK		 1273static int ocfs2_check_set_options(struct super_block *sb,
1274 struct mount_options *options)
1275{
1276 if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
1277 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1278 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1279 mlog(ML_ERROR, "User quotas were requested, but this "
1280 "filesystem does not have the feature enabled.\n");
1281 return 0;
1282 }
1283 if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1284 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1285 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1286 mlog(ML_ERROR, "Group quotas were requested, but this "
1287 "filesystem does not have the feature enabled.\n");
1288 return 0;
1289 }
1290 if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
1291 !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
1292 mlog(ML_ERROR, "ACL support requested but extended attributes "
1293 "feature is not enabled\n");
1294 return 0;
1295 }
1296 /* No ACL setting specified? Use XATTR feature... */
1297 if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
1298 OCFS2_MOUNT_NO_POSIX_ACL))) {
1299 if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
1300 options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1301 else
1302 options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
1303 }
1304 return 1;
1305}
1306
ccd979bd
MF		 1307static int ocfs2_parse_options(struct super_block *sb,
1308 char *options,
c0123ade 1309 struct mount_options *mopt,
ccd979bd
MF		 1310 int is_remount)
1311{
52c303c5 1312 int status, user_stack = 0;
ccd979bd 1313 char *p;
2c442719 1314 u32 tmp;
ccd979bd 1315
32a42d39 1316 trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
ccd979bd 1317
d147b3d6 1318 mopt->commit_interval = 0;
4b37fcb7 1319 mopt->mount_opt = OCFS2_MOUNT_NOINTR;
c0123ade
TY		 1320 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1321 mopt->slot = OCFS2_INVALID_SLOT;
73c8a800 1322 mopt->localalloc_opt = -1;
b61817e1 1323 mopt->cluster_stack[0] = '\0';
d02f00cc 1324 mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
83f92318 1325 mopt->dir_resv_level = -1;
ccd979bd
MF		 1326
1327 if (!options) {
1328 status = 1;
1329 goto bail;
1330 }
1331
1332 while ((p = strsep(&options, ",")) != NULL) {
1333 int token, option;
1334 substring_t args[MAX_OPT_ARGS];
1335
1336 if (!*p)
1337 continue;
1338
1339 token = match_token(p, tokens, args);
1340 switch (token) {
1341 case Opt_hb_local:
c0123ade 1342 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 1343 break;
1344 case Opt_hb_none:
2c442719
SM		 1345 mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
1346 break;
1347 case Opt_hb_global:
1348 mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
ccd979bd
MF		 1349 break;
1350 case Opt_barrier:
1351 if (match_int(&args[0], &option)) {
1352 status = 0;
1353 goto bail;
1354 }
1355 if (option)
c0123ade 1356 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 1357 else
c0123ade 1358 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 1359 break;
1360 case Opt_intr:
c0123ade 1361 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1362 break;
1363 case Opt_nointr:
c0123ade 1364 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1365 break;
1366 case Opt_err_panic:
c0123ade 1367 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1368 break;
1369 case Opt_err_ro:
c0123ade 1370 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1371 break;
1372 case Opt_data_ordered:
c0123ade 1373 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 1374 break;
1375 case Opt_data_writeback:
c0123ade 1376 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 1377 break;
cf1d6c76
TY		 1378 case Opt_user_xattr:
1379 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1380 break;
1381 case Opt_nouser_xattr:
1382 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1383 break;
7f1a37e3
TY		 1384 case Opt_atime_quantum:
1385 if (match_int(&args[0], &option)) {
1386 status = 0;
1387 goto bail;
1388 }
1389 if (option >= 0)
c0123ade 1390 mopt->atime_quantum = option;
7f1a37e3 1391 break;
baf4661a
SM		 1392 case Opt_slot:
1393 option = 0;
1394 if (match_int(&args[0], &option)) {
1395 status = 0;
1396 goto bail;
1397 }
1398 if (option)
c0123ade 1399 mopt->slot = (s16)option;
baf4661a 1400 break;
d147b3d6
MF		 1401 case Opt_commit:
1402 option = 0;
1403 if (match_int(&args[0], &option)) {
1404 status = 0;
1405 goto bail;
1406 }
1407 if (option < 0)
1408 return 0;
1409 if (option == 0)
2b4e30fb 1410 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
d147b3d6
MF		 1411 mopt->commit_interval = HZ * option;
1412 break;
2fbe8d1e
SM		 1413 case Opt_localalloc:
1414 option = 0;
1415 if (match_int(&args[0], &option)) {
1416 status = 0;
1417 goto bail;
1418 }
73c8a800 1419 if (option >= 0)
2fbe8d1e
SM		 1420 mopt->localalloc_opt = option;
1421 break;
53fc622b
MF		 1422 case Opt_localflocks:
1423 /*
1424 * Changing this during remount could race
1425 * flock() requests, or "unbalance" existing
1426 * ones (e.g., a lock is taken in one mode but
1427 * dropped in the other). If users care enough
1428 * to flip locking modes during remount, we
1429 * could add a "local" flag to individual
1430 * flock structures for proper tracking of
1431 * state.
1432 */
1433 if (!is_remount)
1434 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1435 break;
b61817e1
JB		 1436 case Opt_stack:
1437 /* Check both that the option we were passed
1438 * is of the right length and that it is a proper
1439 * string of the right length.
1440 */
1441 if (((args[0].to - args[0].from) !=
1442 OCFS2_STACK_LABEL_LEN) ||
1443 (strnlen(args[0].from,
1444 OCFS2_STACK_LABEL_LEN) !=
1445 OCFS2_STACK_LABEL_LEN)) {
1446 mlog(ML_ERROR,
1447 "Invalid cluster_stack option\n");
1448 status = 0;
1449 goto bail;
1450 }
1451 memcpy(mopt->cluster_stack, args[0].from,
1452 OCFS2_STACK_LABEL_LEN);
1453 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
52c303c5
MF		 1454 /*
1455 * Open code the memcmp here as we don't have
1456 * an osb to pass to
1457 * ocfs2_userspace_stack().
1458 */
1459 if (memcmp(mopt->cluster_stack,
1460 OCFS2_CLASSIC_CLUSTER_STACK,
1461 OCFS2_STACK_LABEL_LEN))
1462 user_stack = 1;
b61817e1 1463 break;
12462f1d
JB		 1464 case Opt_inode64:
1465 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1466 break;
19ece546 1467 case Opt_usrquota:
19ece546
JK		 1468 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1469 break;
1470 case Opt_grpquota:
19ece546
JK		 1471 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1472 break;
7bdb0d18
TY		 1473 case Opt_coherency_buffered:
1474 mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
1475 break;
1476 case Opt_coherency_full:
1477 mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
1478 break;
a68979b8
TY		 1479 case Opt_acl:
1480 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
5297aad8 1481 mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
a68979b8
TY		 1482 break;
1483 case Opt_noacl:
5297aad8 1484 mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
a68979b8
TY		 1485 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1486 break;
d02f00cc
MF		 1487 case Opt_resv_level:
1488 if (is_remount)
1489 break;
1490 if (match_int(&args[0], &option)) {
1491 status = 0;
1492 goto bail;
1493 }
1494 if (option >= OCFS2_MIN_RESV_LEVEL &&
1495 option < OCFS2_MAX_RESV_LEVEL)
1496 mopt->resv_level = option;
1497 break;
83f92318
MF		 1498 case Opt_dir_resv_level:
1499 if (is_remount)
1500 break;
1501 if (match_int(&args[0], &option)) {
1502 status = 0;
1503 goto bail;
1504 }
1505 if (option >= OCFS2_MIN_RESV_LEVEL &&
1506 option < OCFS2_MAX_RESV_LEVEL)
1507 mopt->dir_resv_level = option;
1508 break;
ccd979bd
MF		 1509 default:
1510 mlog(ML_ERROR,
1511 "Unrecognized mount option \"%s\" "
1512 "or missing value\n", p);
1513 status = 0;
1514 goto bail;
1515 }
1516 }
1517
52c303c5
MF		 1518 if (user_stack == 0) {
1519 /* Ensure only one heartbeat mode */
1520 tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
1521 OCFS2_MOUNT_HB_GLOBAL |
1522 OCFS2_MOUNT_HB_NONE);
1523 if (hweight32(tmp) != 1) {
1524 mlog(ML_ERROR, "Invalid heartbeat mount options\n");
1525 status = 0;
1526 goto bail;
1527 }
2c442719
SM		 1528 }
1529
ccd979bd
MF		 1530 status = 1;
1531
1532bail:
ccd979bd
MF		 1533 return status;
1534}
1535
d550071c
SM		 1536static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1537{
1538 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1539 unsigned long opts = osb->s_mount_opt;
ebcee4b5 1540 unsigned int local_alloc_megs;
d550071c 1541
2c442719
SM		 1542 if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
1543 seq_printf(s, ",_netdev");
1544 if (opts & OCFS2_MOUNT_HB_LOCAL)
1545 seq_printf(s, ",%s", OCFS2_HB_LOCAL);
1546 else
1547 seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
1548 } else
1549 seq_printf(s, ",%s", OCFS2_HB_NONE);
d550071c
SM		 1550
1551 if (opts & OCFS2_MOUNT_NOINTR)
1552 seq_printf(s, ",nointr");
1553
1554 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1555 seq_printf(s, ",data=writeback");
1556 else
1557 seq_printf(s, ",data=ordered");
1558
1559 if (opts & OCFS2_MOUNT_BARRIER)
1560 seq_printf(s, ",barrier=1");
1561
1562 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1563 seq_printf(s, ",errors=panic");
1564 else
1565 seq_printf(s, ",errors=remount-ro");
1566
1567 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1568 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1569
e2b0c215 1570 if (!(mnt->mnt_flags & MNT_NOATIME) && !(mnt->mnt_flags & MNT_RELATIME))
d550071c
SM		 1571 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1572
d147b3d6
MF		 1573 if (osb->osb_commit_interval)
1574 seq_printf(s, ",commit=%u",
1575 (unsigned) (osb->osb_commit_interval / HZ));
1576
ebcee4b5 1577 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
6b82021b 1578 if (local_alloc_megs != ocfs2_la_default_mb(osb))
ebcee4b5 1579 seq_printf(s, ",localalloc=%d", local_alloc_megs);
2fbe8d1e 1580
53fc622b
MF		 1581 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1582 seq_printf(s, ",localflocks,");
1583
b61817e1
JB		 1584 if (osb->osb_cluster_stack[0])
1585 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1586 osb->osb_cluster_stack);
19ece546
JK		 1587 if (opts & OCFS2_MOUNT_USRQUOTA)
1588 seq_printf(s, ",usrquota");
1589 if (opts & OCFS2_MOUNT_GRPQUOTA)
1590 seq_printf(s, ",grpquota");
b61817e1 1591
7bdb0d18
TY		 1592 if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
1593 seq_printf(s, ",coherency=buffered");
1594 else
1595 seq_printf(s, ",coherency=full");
1596
b0f73cfc
SM		 1597 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1598 seq_printf(s, ",nouser_xattr");
1599 else
1600 seq_printf(s, ",user_xattr");
1601
12462f1d
JB		 1602 if (opts & OCFS2_MOUNT_INODE64)
1603 seq_printf(s, ",inode64");
1604
a68979b8
TY		 1605 if (opts & OCFS2_MOUNT_POSIX_ACL)
1606 seq_printf(s, ",acl");
1607 else
1608 seq_printf(s, ",noacl");
a68979b8 1609
d02f00cc
MF		 1610 if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
1611 seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
1612
83f92318
MF		 1613 if (osb->osb_dir_resv_level != osb->osb_resv_level)
1614 seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
1615
d550071c
SM		 1616 return 0;
1617}
1618
ccd979bd
MF		 1619static int __init ocfs2_init(void)
1620{
1621 int status;
1622
ccd979bd
MF		 1623 ocfs2_print_version();
1624
ccd979bd
MF		 1625 status = init_ocfs2_uptodate_cache();
1626 if (status < 0) {
1627 mlog_errno(status);
1628 goto leave;
1629 }
1630
1631 status = ocfs2_initialize_mem_caches();
1632 if (status < 0) {
1633 mlog_errno(status);
1634 goto leave;
1635 }
1636
1637 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1638 if (!ocfs2_wq) {
1639 status = -ENOMEM;
1640 goto leave;
1641 }
1642
ccd979bd
MF		 1643 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1644 if (!ocfs2_debugfs_root) {
1645 status = -EFAULT;
1646 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1647 }
1648
63e0c48a
JB		 1649 ocfs2_set_locking_protocol();
1650
9e33d69f 1651 status = register_quota_format(&ocfs2_quota_format);
ccd979bd
MF		 1652leave:
1653 if (status < 0) {
1654 ocfs2_free_mem_caches();
1655 exit_ocfs2_uptodate_cache();
c1e8d35e 1656 mlog_errno(status);
ccd979bd
MF		 1657 }
1658
ccd979bd
MF		 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{
ccd979bd
MF		 1667 if (ocfs2_wq) {
1668 flush_workqueue(ocfs2_wq);
1669 destroy_workqueue(ocfs2_wq);
1670 }
1671
9e33d69f
JK		 1672 unregister_quota_format(&ocfs2_quota_format);
1673
ccd979bd
MF		 1674 debugfs_remove(ocfs2_debugfs_root);
1675
1676 ocfs2_free_mem_caches();
1677
1678 unregister_filesystem(&ocfs2_fs_type);
1679
ccd979bd 1680 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 1681}
1682
1683static void ocfs2_put_super(struct super_block *sb)
1684{
32a42d39 1685 trace_ocfs2_put_super(sb);
ccd979bd
MF		 1686
1687 ocfs2_sync_blockdev(sb);
1688 ocfs2_dismount_volume(sb, 0);
ccd979bd
MF		 1689}
1690
726c3342 1691static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 1692{
1693 struct ocfs2_super *osb;
1694 u32 numbits, freebits;
1695 int status;
1696 struct ocfs2_dinode *bm_lock;
1697 struct buffer_head *bh = NULL;
1698 struct inode *inode = NULL;
1699
32a42d39 1700 trace_ocfs2_statfs(dentry->d_sb, buf);
ccd979bd 1701
726c3342 1702 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 1703
1704 inode = ocfs2_get_system_file_inode(osb,
1705 GLOBAL_BITMAP_SYSTEM_INODE,
1706 OCFS2_INVALID_SLOT);
1707 if (!inode) {
1708 mlog(ML_ERROR, "failed to get bitmap inode\n");
1709 status = -EIO;
1710 goto bail;
1711 }
1712
e63aecb6 1713 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1714 if (status < 0) {
1715 mlog_errno(status);
1716 goto bail;
1717 }
1718
1719 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1720
1721 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1722 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1723
1724 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1725 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1726 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1727 buf->f_blocks = ((sector_t) numbits) *
1728 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1729 buf->f_bfree = ((sector_t) freebits) *
1730 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1731 buf->f_bavail = buf->f_bfree;
1732 buf->f_files = numbits;
1733 buf->f_ffree = freebits;
837711f8
CL		 1734 buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
1735 & 0xFFFFFFFFUL;
1736 buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
1737 OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
ccd979bd
MF		 1738
1739 brelse(bh);
1740
e63aecb6 1741 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1742 status = 0;
1743bail:
1744 if (inode)
1745 iput(inode);
1746
c1e8d35e
TM		 1747 if (status)
1748 mlog_errno(status);
ccd979bd
MF		 1749
1750 return status;
1751}
1752
51cc5068 1753static void ocfs2_inode_init_once(void *data)
ccd979bd
MF		 1754{
1755 struct ocfs2_inode_info *oi = data;
1756
a35afb83
CL		 1757 oi->ip_flags = 0;
1758 oi->ip_open_count = 0;
1759 spin_lock_init(&oi->ip_lock);
1760 ocfs2_extent_map_init(&oi->vfs_inode);
1761 INIT_LIST_HEAD(&oi->ip_io_markers);
a35afb83 1762 oi->ip_dir_start_lookup = 0;
ccd979bd 1763
a35afb83 1764 init_rwsem(&oi->ip_alloc_sem);
cf1d6c76 1765 init_rwsem(&oi->ip_xattr_sem);
a35afb83 1766 mutex_init(&oi->ip_io_mutex);
ccd979bd 1767
a35afb83
CL		 1768 oi->ip_blkno = 0ULL;
1769 oi->ip_clusters = 0;
ccd979bd 1770
4fe370af
MF		 1771 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1772
a35afb83 1773 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1774 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1775 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1776
8cb471e8 1777 ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
6e5a3d75 1778 &ocfs2_inode_caching_ops);
ccd979bd 1779
a35afb83 1780 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1781}
1782
1783static int ocfs2_initialize_mem_caches(void)
1784{
1785 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1786 sizeof(struct ocfs2_inode_info),
1787 0,
1788 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1789 SLAB_MEM_SPREAD),
20c2df83 1790 ocfs2_inode_init_once);
9e33d69f
JK		 1791 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1792 sizeof(struct ocfs2_dquot),
1793 0,
1794 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1795 SLAB_MEM_SPREAD),
1796 NULL);
1797 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1798 sizeof(struct ocfs2_quota_chunk),
1799 0,
1800 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1801 NULL);
1802 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1803 !ocfs2_qf_chunk_cachep) {
1804 if (ocfs2_inode_cachep)
1805 kmem_cache_destroy(ocfs2_inode_cachep);
1806 if (ocfs2_dquot_cachep)
1807 kmem_cache_destroy(ocfs2_dquot_cachep);
1808 if (ocfs2_qf_chunk_cachep)
1809 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
ccd979bd 1810 return -ENOMEM;
9e33d69f 1811 }
ccd979bd 1812
ccd979bd
MF		 1813 return 0;
1814}
1815
1816static void ocfs2_free_mem_caches(void)
1817{
1818 if (ocfs2_inode_cachep)
1819 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd 1820 ocfs2_inode_cachep = NULL;
9e33d69f
JK		 1821
1822 if (ocfs2_dquot_cachep)
1823 kmem_cache_destroy(ocfs2_dquot_cachep);
1824 ocfs2_dquot_cachep = NULL;
1825
1826 if (ocfs2_qf_chunk_cachep)
1827 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1828 ocfs2_qf_chunk_cachep = NULL;
ccd979bd
MF		 1829}
1830
1831static int ocfs2_get_sector(struct super_block *sb,
1832 struct buffer_head **bh,
1833 int block,
1834 int sect_size)
1835{
1836 if (!sb_set_blocksize(sb, sect_size)) {
1837 mlog(ML_ERROR, "unable to set blocksize\n");
1838 return -EIO;
1839 }
1840
1841 *bh = sb_getblk(sb, block);
1842 if (!*bh) {
1843 mlog_errno(-EIO);
1844 return -EIO;
1845 }
1846 lock_buffer(*bh);
1847 if (!buffer_dirty(*bh))
1848 clear_buffer_uptodate(*bh);
1849 unlock_buffer(*bh);
1850 ll_rw_block(READ, 1, bh);
1851 wait_on_buffer(*bh);
28d57d43 1852 if (!buffer_uptodate(*bh)) {
1853 mlog_errno(-EIO);
1854 brelse(*bh);
1855 *bh = NULL;
1856 return -EIO;
1857 }
1858
ccd979bd
MF		 1859 return 0;
1860}
1861
ccd979bd
MF		 1862static int ocfs2_mount_volume(struct super_block *sb)
1863{
1864 int status = 0;
1865 int unlock_super = 0;
1866 struct ocfs2_super *osb = OCFS2_SB(sb);
1867
ccd979bd
MF		 1868 if (ocfs2_is_hard_readonly(osb))
1869 goto leave;
1870
ccd979bd
MF		 1871 status = ocfs2_dlm_init(osb);
1872 if (status < 0) {
1873 mlog_errno(status);
1874 goto leave;
1875 }
1876
ccd979bd
MF		 1877 status = ocfs2_super_lock(osb, 1);
1878 if (status < 0) {
1879 mlog_errno(status);
1880 goto leave;
1881 }
1882 unlock_super = 1;
1883
1884 /* This will load up the node map and add ourselves to it. */
1885 status = ocfs2_find_slot(osb);
1886 if (status < 0) {
1887 mlog_errno(status);
1888 goto leave;
1889 }
1890
ccd979bd
MF		 1891 /* load all node-local system inodes */
1892 status = ocfs2_init_local_system_inodes(osb);
1893 if (status < 0) {
1894 mlog_errno(status);
1895 goto leave;
1896 }
1897
1898 status = ocfs2_check_volume(osb);
1899 if (status < 0) {
1900 mlog_errno(status);
1901 goto leave;
1902 }
1903
1904 status = ocfs2_truncate_log_init(osb);
06c59bb8 1905 if (status < 0)
ccd979bd 1906 mlog_errno(status);
c271c5c2 1907
ccd979bd
MF		 1908leave:
1909 if (unlock_super)
1910 ocfs2_super_unlock(osb, 1);
1911
ccd979bd
MF		 1912 return status;
1913}
1914
ccd979bd
MF		 1915static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1916{
286eaa95 1917 int tmp, hangup_needed = 0;
ccd979bd 1918 struct ocfs2_super *osb = NULL;
c271c5c2 1919 char nodestr[8];
ccd979bd 1920
32a42d39 1921 trace_ocfs2_dismount_volume(sb);
ccd979bd
MF		 1922
1923 BUG_ON(!sb);
1924 osb = OCFS2_SB(sb);
1925 BUG_ON(!osb);
1926
50397507
SM		 1927 debugfs_remove(osb->osb_ctxt);
1928
f7b1aa69
JK		 1929 /*
1930 * Flush inode dropping work queue so that deletes are
1931 * performed while the filesystem is still working
1932 */
1933 ocfs2_drop_all_dl_inodes(osb);
1934
692684e1
SM		 1935 /* Orphan scan should be stopped as early as possible */
1936 ocfs2_orphan_scan_stop(osb);
1937
19ece546
JK		 1938 ocfs2_disable_quotas(osb);
1939
ccd979bd
MF		 1940 ocfs2_shutdown_local_alloc(osb);
1941
1942 ocfs2_truncate_log_shutdown(osb);
1943
553abd04
JB		 1944 /* This will disable recovery and flush any recovery work. */
1945 ocfs2_recovery_exit(osb);
ccd979bd
MF		 1946
1947 ocfs2_journal_shutdown(osb);
1948
1949 ocfs2_sync_blockdev(sb);
1950
374a263e
TM		 1951 ocfs2_purge_refcount_trees(osb);
1952
4670c46d
JB		 1953 /* No cluster connection means we've failed during mount, so skip
1954 * all the steps which depended on that to complete. */
1955 if (osb->cconn) {
ccd979bd
MF		 1956 tmp = ocfs2_super_lock(osb, 1);
1957 if (tmp < 0) {
1958 mlog_errno(tmp);
1959 return;
1960 }
19b613d4 1961 }
ccd979bd 1962
19b613d4
MF		 1963 if (osb->slot_num != OCFS2_INVALID_SLOT)
1964 ocfs2_put_slot(osb);
ccd979bd 1965
4670c46d 1966 if (osb->cconn)
ccd979bd 1967 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1968
1969 ocfs2_release_system_inodes(osb);
1970
6953b4c0 1971 /*
6953b4c0
JB		 1972 * If we're dismounting due to mount error, mount.ocfs2 will clean
1973 * up heartbeat. If we're a local mount, there is no heartbeat.
1974 * If we failed before we got a uuid_str yet, we can't stop
1975 * heartbeat. Otherwise, do it.
1976 */
03efed8a
TY		 1977 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
1978 !ocfs2_is_hard_readonly(osb))
286eaa95
JB		 1979 hangup_needed = 1;
1980
1981 if (osb->cconn)
1982 ocfs2_dlm_shutdown(osb, hangup_needed);
1983
73be192b 1984 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
286eaa95
JB		 1985 debugfs_remove(osb->osb_debug_root);
1986
1987 if (hangup_needed)
6953b4c0 1988 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
ccd979bd
MF		 1989
1990 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1991
c271c5c2
SM		 1992 if (ocfs2_mount_local(osb))
1993 snprintf(nodestr, sizeof(nodestr), "local");
1994 else
19fdb624 1995 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1996
1997 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1998 osb->dev_str, nodestr);
ccd979bd
MF		 1999
2000 ocfs2_delete_osb(osb);
2001 kfree(osb);
2002 sb->s_dev = 0;
2003 sb->s_fs_info = NULL;
2004}
2005
2006static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
2007 unsigned uuid_bytes)
2008{
2009 int i, ret;
2010 char *ptr;
2011
2012 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
2013
cd861280 2014 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 2015 if (osb->uuid_str == NULL)
2016 return -ENOMEM;
2017
ccd979bd
MF		 2018 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
2019 /* print with null */
2020 ret = snprintf(ptr, 3, "%02X", uuid[i]);
2021 if (ret != 2) /* drop super cleans up */
2022 return -EINVAL;
2023 /* then only advance past the last char */
2024 ptr += 2;
2025 }
2026
2027 return 0;
2028}
2029
3bdb8efd
PL		 2030/* Make sure entire volume is addressable by our journal. Requires
2031 osb_clusters_at_boot to be valid and for the journal to have been
2032 initialized by ocfs2_journal_init(). */
2033static int ocfs2_journal_addressable(struct ocfs2_super *osb)
2034{
2035 int status = 0;
2036 u64 max_block =
2037 ocfs2_clusters_to_blocks(osb->sb,
2038 osb->osb_clusters_at_boot) - 1;
2039
2040 /* 32-bit block number is always OK. */
2041 if (max_block <= (u32)~0ULL)
2042 goto out;
2043
2044 /* Volume is "huge", so see if our journal is new enough to
2045 support it. */
2046 if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
2047 OCFS2_FEATURE_COMPAT_JBD2_SB) &&
2048 jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
2049 JBD2_FEATURE_INCOMPAT_64BIT))) {
2050 mlog(ML_ERROR, "The journal cannot address the entire volume. "
2051 "Enable the 'block64' journal option with tunefs.ocfs2");
2052 status = -EFBIG;
2053 goto out;
2054 }
2055
2056 out:
2057 return status;
2058}
2059
ccd979bd
MF		 2060static int ocfs2_initialize_super(struct super_block *sb,
2061 struct buffer_head *bh,
73be192b
JB		 2062 int sector_size,
2063 struct ocfs2_blockcheck_stats *stats)
ccd979bd 2064{
bddb8eb3 2065 int status;
5a254031
MF		 2066 int i, cbits, bbits;
2067 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 2068 struct inode *inode = NULL;
ccd979bd
MF		 2069 struct ocfs2_journal *journal;
2070 __le32 uuid_net_key;
2071 struct ocfs2_super *osb;
3bdb8efd 2072 u64 total_blocks;
ccd979bd 2073
cd861280 2074 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 2075 if (!osb) {
2076 status = -ENOMEM;
2077 mlog_errno(status);
2078 goto bail;
2079 }
2080
2081 sb->s_fs_info = osb;
2082 sb->s_op = &ocfs2_sops;
ba87167c 2083 sb->s_d_op = &ocfs2_dentry_ops;
ccd979bd 2084 sb->s_export_op = &ocfs2_export_ops;
19ece546
JK		 2085 sb->s_qcop = &ocfs2_quotactl_ops;
2086 sb->dq_op = &ocfs2_quota_operations;
cf1d6c76 2087 sb->s_xattr = ocfs2_xattr_handlers;
e0dceaf0 2088 sb->s_time_gran = 1;
ccd979bd
MF		 2089 sb->s_flags |= MS_NOATIME;
2090 /* this is needed to support O_LARGEFILE */
5a254031
MF		 2091 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2092 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
2093 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
ccd979bd 2094
9b7895ef
MF		 2095 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
2096
2097 for (i = 0; i < 3; i++)
2098 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
2099 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
2100
ccd979bd
MF		 2101 osb->sb = sb;
2102 /* Save off for ocfs2_rw_direct */
2103 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 2104 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 2105
34d024f8
MF		 2106 spin_lock_init(&osb->dc_task_lock);
2107 init_waitqueue_head(&osb->dc_event);
2108 osb->dc_work_sequence = 0;
2109 osb->dc_wake_sequence = 0;
ccd979bd
MF		 2110 INIT_LIST_HEAD(&osb->blocked_lock_list);
2111 osb->blocked_lock_count = 0;
ccd979bd 2112 spin_lock_init(&osb->osb_lock);
c8b9cf9a 2113 spin_lock_init(&osb->osb_xattr_lock);
b89c5428 2114 ocfs2_init_steal_slots(osb);
ccd979bd
MF		 2115
2116 atomic_set(&osb->alloc_stats.moves, 0);
2117 atomic_set(&osb->alloc_stats.local_data, 0);
2118 atomic_set(&osb->alloc_stats.bitmap_data, 0);
2119 atomic_set(&osb->alloc_stats.bg_allocs, 0);
2120 atomic_set(&osb->alloc_stats.bg_extends, 0);
2121
73be192b
JB		 2122 /* Copy the blockcheck stats from the superblock probe */
2123 osb->osb_ecc_stats = *stats;
2124
ccd979bd
MF		 2125 ocfs2_init_node_maps(osb);
2126
2127 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
2128 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
2129
75d9bbc7
GR		 2130 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2131 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2132 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2133 osb->max_slots);
2134 status = -EINVAL;
2135 goto bail;
2136 }
75d9bbc7 2137
8b712cd5
JM		 2138 ocfs2_orphan_scan_init(osb);
2139
553abd04
JB		 2140 status = ocfs2_recovery_init(osb);
2141 if (status) {
2142 mlog(ML_ERROR, "Unable to initialize recovery state\n");
2143 mlog_errno(status);
2144 goto bail;
2145 }
ccd979bd
MF		 2146
2147 init_waitqueue_head(&osb->checkpoint_event);
2148 atomic_set(&osb->needs_checkpoint, 0);
2149
7f1a37e3
TY		 2150 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
2151
ccd979bd
MF		 2152 osb->slot_num = OCFS2_INVALID_SLOT;
2153
8154da3d
TY		 2154 osb->s_xattr_inline_size = le16_to_cpu(
2155 di->id2.i_super.s_xattr_inline_size);
fdd77704 2156
ccd979bd
MF		 2157 osb->local_alloc_state = OCFS2_LA_UNUSED;
2158 osb->local_alloc_bh = NULL;
9c7af40b 2159 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
ccd979bd 2160
ccd979bd
MF		 2161 init_waitqueue_head(&osb->osb_mount_event);
2162
d02f00cc
MF		 2163 status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
2164 if (status) {
2165 mlog_errno(status);
2166 goto bail;
2167 }
2168
ccd979bd
MF		 2169 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2170 if (!osb->vol_label) {
2171 mlog(ML_ERROR, "unable to alloc vol label\n");
2172 status = -ENOMEM;
2173 goto bail;
2174 }
2175
539d8264
SM		 2176 osb->slot_recovery_generations =
2177 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2178 GFP_KERNEL);
2179 if (!osb->slot_recovery_generations) {
2180 status = -ENOMEM;
2181 mlog_errno(status);
2182 goto bail;
2183 }
2184
b4df6ed8
MF		 2185 init_waitqueue_head(&osb->osb_wipe_event);
2186 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2187 sizeof(*osb->osb_orphan_wipes),
2188 GFP_KERNEL);
2189 if (!osb->osb_orphan_wipes) {
2190 status = -ENOMEM;
2191 mlog_errno(status);
2192 goto bail;
2193 }
2194
374a263e
TM		 2195 osb->osb_rf_lock_tree = RB_ROOT;
2196
ccd979bd
MF		 2197 osb->s_feature_compat =
2198 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2199 osb->s_feature_ro_compat =
2200 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2201 osb->s_feature_incompat =
2202 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2203
2204 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2205 mlog(ML_ERROR, "couldn't mount because of unsupported "
2206 "optional features (%x).\n", i);
2207 status = -EINVAL;
2208 goto bail;
2209 }
2210 if (!(osb->sb->s_flags & MS_RDONLY) &&
2211 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2212 mlog(ML_ERROR, "couldn't mount RDWR because of "
2213 "unsupported optional features (%x).\n", i);
2214 status = -EINVAL;
2215 goto bail;
2216 }
2217
98f486f2
SM		 2218 if (ocfs2_clusterinfo_valid(osb)) {
2219 osb->osb_stackflags =
2220 OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
b61817e1
JB		 2221 memcpy(osb->osb_cluster_stack,
2222 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2223 OCFS2_STACK_LABEL_LEN);
2224 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2225 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2226 mlog(ML_ERROR,
2227 "couldn't mount because of an invalid "
2228 "cluster stack label (%s) \n",
2229 osb->osb_cluster_stack);
2230 status = -EINVAL;
2231 goto bail;
2232 }
2233 } else {
2234 /* The empty string is identical with classic tools that
2235 * don't know about s_cluster_info. */
2236 osb->osb_cluster_stack[0] = '\0';
2237 }
2238
ccd979bd
MF		 2239 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2240
2241 /* FIXME
2242 * This should be done in ocfs2_journal_init(), but unknown
2243 * ordering issues will cause the filesystem to crash.
2244 * If anyone wants to figure out what part of the code
2245 * refers to osb->journal before ocfs2_journal_init() is run,
2246 * be my guest.
2247 */
2248 /* initialize our journal structure */
2249
cd861280 2250 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 2251 if (!journal) {
2252 mlog(ML_ERROR, "unable to alloc journal\n");
2253 status = -ENOMEM;
2254 goto bail;
2255 }
2256 osb->journal = journal;
2257 journal->j_osb = osb;
2258
2259 atomic_set(&journal->j_num_trans, 0);
2260 init_rwsem(&journal->j_trans_barrier);
2261 init_waitqueue_head(&journal->j_checkpointed);
2262 spin_lock_init(&journal->j_lock);
2263 journal->j_trans_id = (unsigned long) 1;
2264 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 2265 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 2266 journal->j_state = OCFS2_JOURNAL_FREE;
2267
ea455f8a
JK		 2268 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2269 osb->dentry_lock_list = NULL;
2270
ccd979bd
MF		 2271 /* get some pseudo constants for clustersize bits */
2272 osb->s_clustersize_bits =
2273 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2274 osb->s_clustersize = 1 << osb->s_clustersize_bits;
ccd979bd
MF		 2275
2276 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2277 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2278 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2279 osb->s_clustersize);
2280 status = -EINVAL;
2281 goto bail;
2282 }
2283
3bdb8efd
PL		 2284 total_blocks = ocfs2_clusters_to_blocks(osb->sb,
2285 le32_to_cpu(di->i_clusters));
2286
2287 status = generic_check_addressable(osb->sb->s_blocksize_bits,
2288 total_blocks);
2289 if (status) {
2290 mlog(ML_ERROR, "Volume too large "
2291 "to mount safely on this system");
2292 status = -EFBIG;
ccd979bd
MF		 2293 goto bail;
2294 }
2295
2296 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2297 sizeof(di->id2.i_super.s_uuid))) {
2298 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2299 status = -ENOMEM;
2300 goto bail;
2301 }
2302
78427043 2303 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
ccd979bd
MF		 2304
2305 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2306 osb->vol_label[63] = '\0';
2307 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2308 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2309 osb->first_cluster_group_blkno =
2310 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2311 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
cf1d6c76 2312 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
32a42d39
TM		 2313 trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
2314 (unsigned long long)osb->root_blkno,
2315 (unsigned long long)osb->system_dir_blkno,
2316 osb->s_clustersize_bits);
ccd979bd
MF		 2317
2318 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2319 if (!osb->osb_dlm_debug) {
2320 status = -ENOMEM;
2321 mlog_errno(status);
2322 goto bail;
2323 }
2324
2325 atomic_set(&osb->vol_state, VOLUME_INIT);
2326
2327 /* load root, system_dir, and all global system inodes */
2328 status = ocfs2_init_global_system_inodes(osb);
2329 if (status < 0) {
2330 mlog_errno(status);
2331 goto bail;
2332 }
2333
2334 /*
2335 * global bitmap
2336 */
2337 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2338 OCFS2_INVALID_SLOT);
2339 if (!inode) {
2340 status = -EINVAL;
2341 mlog_errno(status);
2342 goto bail;
2343 }
2344
2345 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
6b82021b 2346 osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
ccd979bd 2347 iput(inode);
ccd979bd 2348
8571882c
TM		 2349 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
2350 osb->s_feature_incompat) * 8;
ccd979bd
MF		 2351
2352 status = ocfs2_init_slot_info(osb);
2353 if (status < 0) {
2354 mlog_errno(status);
2355 goto bail;
2356 }
1cfd8bd0 2357 cleancache_init_shared_fs((char *)&uuid_net_key, sb);
ccd979bd 2358
ccd979bd 2359bail:
ccd979bd
MF		 2360 return status;
2361}
2362
2363/*
2364 * will return: -EAGAIN if it is ok to keep searching for superblocks
2365 * -EINVAL if there is a bad superblock
2366 * 0 on success
2367 */
2368static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2369 struct buffer_head *bh,
73be192b
JB		 2370 u32 blksz,
2371 struct ocfs2_blockcheck_stats *stats)
ccd979bd
MF		 2372{
2373 int status = -EAGAIN;
2374
ccd979bd
MF		 2375 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2376 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
d030cc97
JB		 2377 /* We have to do a raw check of the feature here */
2378 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2379 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2380 status = ocfs2_block_check_validate(bh->b_data,
2381 bh->b_size,
73be192b
JB		 2382 &di->i_check,
2383 stats);
d030cc97
JB		 2384 if (status)
2385 goto out;
2386 }
ccd979bd
MF		 2387 status = -EINVAL;
2388 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2389 mlog(ML_ERROR, "found superblock with incorrect block "
2390 "size: found %u, should be %u\n",
2391 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2392 blksz);
2393 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2394 OCFS2_MAJOR_REV_LEVEL ||
2395 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2396 OCFS2_MINOR_REV_LEVEL) {
2397 mlog(ML_ERROR, "found superblock with bad version: "
2398 "found %u.%u, should be %u.%u\n",
2399 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2400 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2401 OCFS2_MAJOR_REV_LEVEL,
2402 OCFS2_MINOR_REV_LEVEL);
2403 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2404 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 2405 "found %llu, should be %llu\n",
1ca1a111 2406 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 2407 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 2408 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2409 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2410 mlog(ML_ERROR, "bad cluster size found: %u\n",
2411 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2412 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2413 mlog(ML_ERROR, "bad root_blkno: 0\n");
2414 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2415 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2416 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2417 mlog(ML_ERROR,
2418 "Superblock slots found greater than file system "
2419 "maximum: found %u, max %u\n",
2420 le16_to_cpu(di->id2.i_super.s_max_slots),
2421 OCFS2_MAX_SLOTS);
2422 } else {
2423 /* found it! */
2424 status = 0;
2425 }
2426 }
2427
d030cc97 2428out:
c1e8d35e
TM		 2429 if (status && status != -EAGAIN)
2430 mlog_errno(status);
ccd979bd
MF		 2431 return status;
2432}
2433
2434static int ocfs2_check_volume(struct ocfs2_super *osb)
2435{
bddb8eb3 2436 int status;
ccd979bd 2437 int dirty;
c271c5c2 2438 int local;
ccd979bd
MF		 2439 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2440 * recover
2441 * ourselves. */
2442
ccd979bd
MF		 2443 /* Init our journal object. */
2444 status = ocfs2_journal_init(osb->journal, &dirty);
2445 if (status < 0) {
2446 mlog(ML_ERROR, "Could not initialize journal!\n");
2447 goto finally;
2448 }
2449
3bdb8efd
PL		 2450 /* Now that journal has been initialized, check to make sure
2451 entire volume is addressable. */
2452 status = ocfs2_journal_addressable(osb);
2453 if (status)
2454 goto finally;
2455
ccd979bd
MF		 2456 /* If the journal was unmounted cleanly then we don't want to
2457 * recover anything. Otherwise, journal_load will do that
2458 * dirty work for us :) */
2459 if (!dirty) {
2460 status = ocfs2_journal_wipe(osb->journal, 0);
2461 if (status < 0) {
2462 mlog_errno(status);
2463 goto finally;
2464 }
2465 } else {
2466 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2467 "recovering volume.\n");
2468 }
2469
c271c5c2
SM		 2470 local = ocfs2_mount_local(osb);
2471
ccd979bd 2472 /* will play back anything left in the journal. */
539d8264 2473 status = ocfs2_journal_load(osb->journal, local, dirty);
01af4820
WW		 2474 if (status < 0) {
2475 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2476 goto finally;
2477 }
ccd979bd
MF		 2478
2479 if (dirty) {
2480 /* recover my local alloc if we didn't unmount cleanly. */
2481 status = ocfs2_begin_local_alloc_recovery(osb,
2482 osb->slot_num,
2483 &local_alloc);
2484 if (status < 0) {
2485 mlog_errno(status);
2486 goto finally;
2487 }
2488 /* we complete the recovery process after we've marked
2489 * ourselves as mounted. */
2490 }
2491
ccd979bd
MF		 2492 status = ocfs2_load_local_alloc(osb);
2493 if (status < 0) {
2494 mlog_errno(status);
2495 goto finally;
2496 }
2497
2498 if (dirty) {
2499 /* Recovery will be completed after we've mounted the
2500 * rest of the volume. */
2501 osb->dirty = 1;
2502 osb->local_alloc_copy = local_alloc;
2503 local_alloc = NULL;
2504 }
2505
2506 /* go through each journal, trylock it and if you get the
2507 * lock, and it's marked as dirty, set the bit in the recover
2508 * map and launch a recovery thread for it. */
2509 status = ocfs2_mark_dead_nodes(osb);
9140db04
SE		 2510 if (status < 0) {
2511 mlog_errno(status);
2512 goto finally;
2513 }
2514
2515 status = ocfs2_compute_replay_slots(osb);
ccd979bd
MF		 2516 if (status < 0)
2517 mlog_errno(status);
2518
2519finally:
2520 if (local_alloc)
2521 kfree(local_alloc);
2522
c1e8d35e
TM		 2523 if (status)
2524 mlog_errno(status);
ccd979bd
MF		 2525 return status;
2526}
2527
2528/*
2529 * The routine gets called from dismount or close whenever a dismount on
2530 * volume is requested and the osb open count becomes 1.
2531 * It will remove the osb from the global list and also free up all the
2532 * initialized resources and fileobject.
2533 */
2534static void ocfs2_delete_osb(struct ocfs2_super *osb)
2535{
ccd979bd
MF		 2536 /* This function assumes that the caller has the main osb resource */
2537
8e8a4603 2538 ocfs2_free_slot_info(osb);
ccd979bd 2539
b4df6ed8 2540 kfree(osb->osb_orphan_wipes);
539d8264 2541 kfree(osb->slot_recovery_generations);
ccd979bd
MF		 2542 /* FIXME
2543 * This belongs in journal shutdown, but because we have to
421f91d2 2544 * allocate osb->journal at the start of ocfs2_initialize_osb(),
ccd979bd
MF		 2545 * we free it here.
2546 */
2547 kfree(osb->journal);
2548 if (osb->local_alloc_copy)
2549 kfree(osb->local_alloc_copy);
2550 kfree(osb->uuid_str);
2551 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2552 memset(osb, 0, sizeof(struct ocfs2_super));
ccd979bd
MF		 2553}
2554
2555/* Put OCFS2 into a readonly state, or (if the user specifies it),
2556 * panic(). We do not support continue-on-error operation. */
2557static void ocfs2_handle_error(struct super_block *sb)
2558{
2559 struct ocfs2_super *osb = OCFS2_SB(sb);
2560
2561 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2562 panic("OCFS2: (device %s): panic forced after error\n",
2563 sb->s_id);
2564
2565 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2566
2567 if (sb->s_flags & MS_RDONLY &&
2568 (ocfs2_is_soft_readonly(osb) ||
2569 ocfs2_is_hard_readonly(osb)))
2570 return;
2571
2572 printk(KERN_CRIT "File system is now read-only due to the potential "
2573 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2574 "system is unmounted.\n");
2575 sb->s_flags |= MS_RDONLY;
2576 ocfs2_set_ro_flag(osb, 0);
2577}
2578
2579static char error_buf[1024];
2580
2581void __ocfs2_error(struct super_block *sb,
2582 const char *function,
2583 const char *fmt, ...)
2584{
2585 va_list args;
2586
2587 va_start(args, fmt);
4a6e617a 2588 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 2589 va_end(args);
2590
2591 /* Not using mlog here because we want to show the actual
2592 * function the error came from. */
2593 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2594 sb->s_id, function, error_buf);
2595
2596 ocfs2_handle_error(sb);
2597}
2598
2599/* Handle critical errors. This is intentionally more drastic than
2600 * ocfs2_handle_error, so we only use for things like journal errors,
2601 * etc. */
2602void __ocfs2_abort(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 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2613 sb->s_id, function, error_buf);
2614
2615 /* We don't have the cluster support yet to go straight to
2616 * hard readonly in here. Until then, we want to keep
2617 * ocfs2_abort() so that we can at least mark critical
2618 * errors.
2619 *
2620 * TODO: This should abort the journal and alert other nodes
2621 * that our slot needs recovery. */
2622
2623 /* Force a panic(). This stinks, but it's better than letting
2624 * things continue without having a proper hard readonly
2625 * here. */
a2f2ddbf
SM		 2626 if (!ocfs2_mount_local(OCFS2_SB(sb)))
2627 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 2628 ocfs2_handle_error(sb);
2629}
2630
e4b963f1
JB		 2631/*
2632 * Void signal blockers, because in-kernel sigprocmask() only fails
2633 * when SIG_* is wrong.
2634 */
2635void ocfs2_block_signals(sigset_t *oldset)
2636{
2637 int rc;
2638 sigset_t blocked;
2639
2640 sigfillset(&blocked);
2641 rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
2642 BUG_ON(rc);
2643}
2644
2645void ocfs2_unblock_signals(sigset_t *oldset)
2646{
2647 int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
2648 BUG_ON(rc);
2649}
2650
ccd979bd
MF		 2651module_init(ocfs2_init);
2652module_exit(ocfs2_exit);
Linux kernel - Deliverables
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