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VFS: Uninline the function put_mnt_ns()
[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>
31#include <linux/utsname.h>
32#include <linux/init.h>
33#include <linux/random.h>
34#include <linux/statfs.h>
35#include <linux/moduleparam.h>
36#include <linux/blkdev.h>
37#include <linux/socket.h>
38#include <linux/inet.h>
39#include <linux/parser.h>
40#include <linux/crc32.h>
41#include <linux/debugfs.h>
d550071c 42#include <linux/mount.h>
6953b4c0 43#include <linux/seq_file.h>
19ece546 44#include <linux/quotaops.h>
337eb00a 45#include <linux/smp_lock.h>
ccd979bd
MF		 46
47#define MLOG_MASK_PREFIX ML_SUPER
48#include <cluster/masklog.h>
49
50#include "ocfs2.h"
51
52/* this should be the only file to include a version 1 header */
53#include "ocfs1_fs_compat.h"
54
55#include "alloc.h"
d030cc97 56#include "blockcheck.h"
ccd979bd
MF		 57#include "dlmglue.h"
58#include "export.h"
59#include "extent_map.h"
60#include "heartbeat.h"
61#include "inode.h"
62#include "journal.h"
63#include "localalloc.h"
64#include "namei.h"
65#include "slot_map.h"
66#include "super.h"
67#include "sysfile.h"
68#include "uptodate.h"
69#include "ver.h"
cf1d6c76 70#include "xattr.h"
9e33d69f 71#include "quota.h"
ccd979bd
MF		 72
73#include "buffer_head_io.h"
74
e18b890b 75static struct kmem_cache *ocfs2_inode_cachep = NULL;
9e33d69f
JK		 76struct kmem_cache *ocfs2_dquot_cachep;
77struct kmem_cache *ocfs2_qf_chunk_cachep;
ccd979bd 78
ccd979bd
MF		 79/* OCFS2 needs to schedule several differnt types of work which
80 * require cluster locking, disk I/O, recovery waits, etc. Since these
81 * types of work tend to be heavy we avoid using the kernel events
82 * workqueue and schedule on our own. */
83struct workqueue_struct *ocfs2_wq = NULL;
84
85static struct dentry *ocfs2_debugfs_root = NULL;
86
87MODULE_AUTHOR("Oracle");
88MODULE_LICENSE("GPL");
89
c0123ade
TY		 90struct mount_options
91{
d147b3d6 92 unsigned long commit_interval;
c0123ade
TY		 93 unsigned long mount_opt;
94 unsigned int atime_quantum;
95 signed short slot;
2fbe8d1e 96 unsigned int localalloc_opt;
b61817e1 97 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c0123ade
TY		 98};
99
ccd979bd 100static int ocfs2_parse_options(struct super_block *sb, char *options,
c0123ade 101 struct mount_options *mopt,
baf4661a 102 int is_remount);
d550071c 103static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
ccd979bd
MF		 104static void ocfs2_put_super(struct super_block *sb);
105static int ocfs2_mount_volume(struct super_block *sb);
106static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
107static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
108static int ocfs2_initialize_mem_caches(void);
109static void ocfs2_free_mem_caches(void);
110static void ocfs2_delete_osb(struct ocfs2_super *osb);
111
726c3342 112static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
ccd979bd
MF		 113
114static int ocfs2_sync_fs(struct super_block *sb, int wait);
115
116static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
117static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
bddb8eb3 118static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
ccd979bd
MF		 119static int ocfs2_check_volume(struct ocfs2_super *osb);
120static int ocfs2_verify_volume(struct ocfs2_dinode *di,
121 struct buffer_head *bh,
73be192b
JB		 122 u32 sectsize,
123 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 124static int ocfs2_initialize_super(struct super_block *sb,
125 struct buffer_head *bh,
73be192b
JB		 126 int sector_size,
127 struct ocfs2_blockcheck_stats *stats);
ccd979bd
MF		 128static int ocfs2_get_sector(struct super_block *sb,
129 struct buffer_head **bh,
130 int block,
131 int sect_size);
ccd979bd
MF		 132static struct inode *ocfs2_alloc_inode(struct super_block *sb);
133static void ocfs2_destroy_inode(struct inode *inode);
19ece546
JK		 134static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
135static int ocfs2_enable_quotas(struct ocfs2_super *osb);
136static void ocfs2_disable_quotas(struct ocfs2_super *osb);
ccd979bd 137
ee9b6d61 138static const struct super_operations ocfs2_sops = {
ccd979bd
MF		 139 .statfs = ocfs2_statfs,
140 .alloc_inode = ocfs2_alloc_inode,
141 .destroy_inode = ocfs2_destroy_inode,
142 .drop_inode = ocfs2_drop_inode,
143 .clear_inode = ocfs2_clear_inode,
144 .delete_inode = ocfs2_delete_inode,
145 .sync_fs = ocfs2_sync_fs,
ccd979bd
MF		 146 .put_super = ocfs2_put_super,
147 .remount_fs = ocfs2_remount,
d550071c 148 .show_options = ocfs2_show_options,
9e33d69f
JK		 149 .quota_read = ocfs2_quota_read,
150 .quota_write = ocfs2_quota_write,
ccd979bd
MF		 151};
152
153enum {
154 Opt_barrier,
155 Opt_err_panic,
156 Opt_err_ro,
157 Opt_intr,
158 Opt_nointr,
159 Opt_hb_none,
160 Opt_hb_local,
161 Opt_data_ordered,
162 Opt_data_writeback,
7f1a37e3 163 Opt_atime_quantum,
baf4661a 164 Opt_slot,
d147b3d6 165 Opt_commit,
2fbe8d1e 166 Opt_localalloc,
53fc622b 167 Opt_localflocks,
b61817e1 168 Opt_stack,
cf1d6c76
TY		 169 Opt_user_xattr,
170 Opt_nouser_xattr,
12462f1d 171 Opt_inode64,
a68979b8
TY		 172 Opt_acl,
173 Opt_noacl,
19ece546
JK		 174 Opt_usrquota,
175 Opt_grpquota,
ccd979bd
MF		 176 Opt_err,
177};
178
a447c093 179static const match_table_t tokens = {
ccd979bd
MF		 180 {Opt_barrier, "barrier=%u"},
181 {Opt_err_panic, "errors=panic"},
182 {Opt_err_ro, "errors=remount-ro"},
183 {Opt_intr, "intr"},
184 {Opt_nointr, "nointr"},
185 {Opt_hb_none, OCFS2_HB_NONE},
186 {Opt_hb_local, OCFS2_HB_LOCAL},
187 {Opt_data_ordered, "data=ordered"},
188 {Opt_data_writeback, "data=writeback"},
7f1a37e3 189 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 190 {Opt_slot, "preferred_slot=%u"},
d147b3d6 191 {Opt_commit, "commit=%u"},
2fbe8d1e 192 {Opt_localalloc, "localalloc=%d"},
53fc622b 193 {Opt_localflocks, "localflocks"},
b61817e1 194 {Opt_stack, "cluster_stack=%s"},
cf1d6c76
TY		 195 {Opt_user_xattr, "user_xattr"},
196 {Opt_nouser_xattr, "nouser_xattr"},
12462f1d 197 {Opt_inode64, "inode64"},
a68979b8
TY		 198 {Opt_acl, "acl"},
199 {Opt_noacl, "noacl"},
19ece546
JK		 200 {Opt_usrquota, "usrquota"},
201 {Opt_grpquota, "grpquota"},
ccd979bd
MF		 202 {Opt_err, NULL}
203};
204
50397507
SM		 205#ifdef CONFIG_DEBUG_FS
206static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
207{
208 int out = 0;
209 int i;
210 struct ocfs2_cluster_connection *cconn = osb->cconn;
211 struct ocfs2_recovery_map *rm = osb->recovery_map;
15633a22 212 struct ocfs2_orphan_scan *os;
50397507
SM		 213
214 out += snprintf(buf + out, len - out,
215 "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
216 "Device", osb->dev_str, osb->uuid_str,
217 osb->fs_generation, osb->vol_label);
218
219 out += snprintf(buf + out, len - out,
220 "%10s => State: %d Flags: 0x%lX\n", "Volume",
221 atomic_read(&osb->vol_state), osb->osb_flags);
222
223 out += snprintf(buf + out, len - out,
224 "%10s => Block: %lu Cluster: %d\n", "Sizes",
225 osb->sb->s_blocksize, osb->s_clustersize);
226
227 out += snprintf(buf + out, len - out,
228 "%10s => Compat: 0x%X Incompat: 0x%X "
229 "ROcompat: 0x%X\n",
230 "Features", osb->s_feature_compat,
231 osb->s_feature_incompat, osb->s_feature_ro_compat);
232
233 out += snprintf(buf + out, len - out,
234 "%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
235 osb->s_mount_opt, osb->s_atime_quantum);
236
237 out += snprintf(buf + out, len - out,
238 "%10s => Stack: %s Name: %*s Version: %d.%d\n",
239 "Cluster",
240 (*osb->osb_cluster_stack == '\0' ?
241 "o2cb" : osb->osb_cluster_stack),
242 cconn->cc_namelen, cconn->cc_name,
243 cconn->cc_version.pv_major, cconn->cc_version.pv_minor);
244
245 spin_lock(&osb->dc_task_lock);
246 out += snprintf(buf + out, len - out,
247 "%10s => Pid: %d Count: %lu WakeSeq: %lu "
248 "WorkSeq: %lu\n", "DownCnvt",
249 task_pid_nr(osb->dc_task), osb->blocked_lock_count,
250 osb->dc_wake_sequence, osb->dc_work_sequence);
251 spin_unlock(&osb->dc_task_lock);
252
253 spin_lock(&osb->osb_lock);
254 out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
255 "Recovery",
256 (osb->recovery_thread_task ?
257 task_pid_nr(osb->recovery_thread_task) : -1));
258 if (rm->rm_used == 0)
259 out += snprintf(buf + out, len - out, " None\n");
260 else {
261 for (i = 0; i < rm->rm_used; i++)
262 out += snprintf(buf + out, len - out, " %d",
263 rm->rm_entries[i]);
264 out += snprintf(buf + out, len - out, "\n");
265 }
266 spin_unlock(&osb->osb_lock);
267
268 out += snprintf(buf + out, len - out,
269 "%10s => Pid: %d Interval: %lu Needs: %d\n", "Commit",
270 task_pid_nr(osb->commit_task), osb->osb_commit_interval,
271 atomic_read(&osb->needs_checkpoint));
272
273 out += snprintf(buf + out, len - out,
274 "%10s => State: %d NumTxns: %d TxnId: %lu\n",
275 "Journal", osb->journal->j_state,
276 atomic_read(&osb->journal->j_num_trans),
277 osb->journal->j_trans_id);
278
279 out += snprintf(buf + out, len - out,
280 "%10s => GlobalAllocs: %d LocalAllocs: %d "
281 "SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
282 "Stats",
283 atomic_read(&osb->alloc_stats.bitmap_data),
284 atomic_read(&osb->alloc_stats.local_data),
285 atomic_read(&osb->alloc_stats.bg_allocs),
286 atomic_read(&osb->alloc_stats.moves),
287 atomic_read(&osb->alloc_stats.bg_extends));
288
289 out += snprintf(buf + out, len - out,
290 "%10s => State: %u Descriptor: %llu Size: %u bits "
291 "Default: %u bits\n",
292 "LocalAlloc", osb->local_alloc_state,
293 (unsigned long long)osb->la_last_gd,
294 osb->local_alloc_bits, osb->local_alloc_default_bits);
295
296 spin_lock(&osb->osb_lock);
297 out += snprintf(buf + out, len - out,
298 "%10s => Slot: %d NumStolen: %d\n", "Steal",
299 osb->s_inode_steal_slot,
300 atomic_read(&osb->s_num_inodes_stolen));
301 spin_unlock(&osb->osb_lock);
302
303 out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
304 "Slots", "Num", "RecoGen");
305
306 for (i = 0; i < osb->max_slots; ++i) {
307 out += snprintf(buf + out, len - out,
308 "%10s %c %3d %10d\n",
309 " ",
310 (i == osb->slot_num ? '*' : ' '),
311 i, osb->slot_recovery_generations[i]);
312 }
313
15633a22
SE		 314 os = &osb->osb_orphan_scan;
315 out += snprintf(buf + out, len - out, "Orphan Scan=> ");
316 out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
317 os->os_count, os->os_seqno);
318 out += snprintf(buf + out, len - out, " Last Scan: %lu seconds ago\n",
319 (get_seconds() - os->os_scantime.tv_sec));
320
50397507
SM		 321 return out;
322}
323
324static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
325{
326 struct ocfs2_super *osb = inode->i_private;
327 char *buf = NULL;
328
329 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
330 if (!buf)
331 goto bail;
332
333 i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
334
335 file->private_data = buf;
336
337 return 0;
338bail:
339 return -ENOMEM;
340}
341
342static int ocfs2_debug_release(struct inode *inode, struct file *file)
343{
344 kfree(file->private_data);
345 return 0;
346}
347
348static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
349 size_t nbytes, loff_t *ppos)
350{
351 return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
352 i_size_read(file->f_mapping->host));
353}
354#else
355static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
356{
357 return 0;
358}
359static int ocfs2_debug_release(struct inode *inode, struct file *file)
360{
361 return 0;
362}
363static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
364 size_t nbytes, loff_t *ppos)
365{
366 return 0;
367}
368#endif /* CONFIG_DEBUG_FS */
369
370static struct file_operations ocfs2_osb_debug_fops = {
371 .open = ocfs2_osb_debug_open,
372 .release = ocfs2_debug_release,
373 .read = ocfs2_debug_read,
374 .llseek = generic_file_llseek,
375};
376
ccd979bd
MF		 377static int ocfs2_sync_fs(struct super_block *sb, int wait)
378{
bddb8eb3 379 int status;
ccd979bd
MF		 380 tid_t target;
381 struct ocfs2_super *osb = OCFS2_SB(sb);
382
ccd979bd
MF		 383 if (ocfs2_is_hard_readonly(osb))
384 return -EROFS;
385
386 if (wait) {
387 status = ocfs2_flush_truncate_log(osb);
388 if (status < 0)
389 mlog_errno(status);
390 } else {
391 ocfs2_schedule_truncate_log_flush(osb, 0);
392 }
393
2b4e30fb
JB		 394 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
395 &target)) {
ccd979bd 396 if (wait)
2b4e30fb
JB		 397 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
398 target);
ccd979bd
MF		 399 }
400 return 0;
401}
402
1a224ad1
JK		 403static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
404{
405 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
406 && (ino == USER_QUOTA_SYSTEM_INODE
407 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
408 return 0;
409 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
410 && (ino == GROUP_QUOTA_SYSTEM_INODE
411 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
412 return 0;
413 return 1;
414}
415
ccd979bd
MF		 416static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
417{
418 struct inode *new = NULL;
419 int status = 0;
420 int i;
421
422 mlog_entry_void();
423
5fa0613e 424 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 425 if (IS_ERR(new)) {
426 status = PTR_ERR(new);
427 mlog_errno(status);
428 goto bail;
429 }
430 osb->root_inode = new;
431
5fa0613e 432 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 433 if (IS_ERR(new)) {
434 status = PTR_ERR(new);
435 mlog_errno(status);
436 goto bail;
437 }
438 osb->sys_root_inode = new;
439
440 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
441 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
1a224ad1
JK		 442 if (!ocfs2_need_system_inode(osb, i))
443 continue;
ccd979bd
MF		 444 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
445 if (!new) {
446 ocfs2_release_system_inodes(osb);
447 status = -EINVAL;
448 mlog_errno(status);
449 /* FIXME: Should ERROR_RO_FS */
450 mlog(ML_ERROR, "Unable to load system inode %d, "
451 "possibly corrupt fs?", i);
452 goto bail;
453 }
454 // the array now has one ref, so drop this one
455 iput(new);
456 }
457
458bail:
459 mlog_exit(status);
460 return status;
461}
462
463static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
464{
465 struct inode *new = NULL;
466 int status = 0;
467 int i;
468
469 mlog_entry_void();
470
471 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
472 i < NUM_SYSTEM_INODES;
473 i++) {
1a224ad1
JK		 474 if (!ocfs2_need_system_inode(osb, i))
475 continue;
ccd979bd
MF		 476 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
477 if (!new) {
478 ocfs2_release_system_inodes(osb);
479 status = -EINVAL;
480 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
481 status, i, osb->slot_num);
482 goto bail;
483 }
484 /* the array now has one ref, so drop this one */
485 iput(new);
486 }
487
488bail:
489 mlog_exit(status);
490 return status;
491}
492
bddb8eb3 493static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
ccd979bd 494{
bddb8eb3 495 int i;
ccd979bd
MF		 496 struct inode *inode;
497
498 mlog_entry_void();
499
500 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
501 inode = osb->system_inodes[i];
502 if (inode) {
503 iput(inode);
504 osb->system_inodes[i] = NULL;
505 }
506 }
507
508 inode = osb->sys_root_inode;
509 if (inode) {
510 iput(inode);
511 osb->sys_root_inode = NULL;
512 }
513
514 inode = osb->root_inode;
515 if (inode) {
516 iput(inode);
517 osb->root_inode = NULL;
518 }
519
bddb8eb3 520 mlog_exit(0);
ccd979bd
MF		 521}
522
523/* We're allocating fs objects, use GFP_NOFS */
524static struct inode *ocfs2_alloc_inode(struct super_block *sb)
525{
526 struct ocfs2_inode_info *oi;
527
e6b4f8da 528 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 529 if (!oi)
530 return NULL;
531
2b4e30fb 532 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
ccd979bd
MF		 533 return &oi->vfs_inode;
534}
535
536static void ocfs2_destroy_inode(struct inode *inode)
537{
538 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
539}
540
5a254031
MF		 541static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
542 unsigned int cbits)
ccd979bd 543{
5a254031
MF		 544 unsigned int bytes = 1 << cbits;
545 unsigned int trim = bytes;
546 unsigned int bitshift = 32;
547
548 /*
549 * i_size and all block offsets in ocfs2 are always 64 bits
550 * wide. i_clusters is 32 bits, in cluster-sized units. So on
551 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 552 */
553
554#if BITS_PER_LONG == 32
90c699a9 555# if defined(CONFIG_LBDAF)
2ecd05ae 556 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 557 /*
558 * We might be limited by page cache size.
559 */
560 if (bytes > PAGE_CACHE_SIZE) {
561 bytes = PAGE_CACHE_SIZE;
562 trim = 1;
563 /*
564 * Shift by 31 here so that we don't get larger than
565 * MAX_LFS_FILESIZE
566 */
567 bitshift = 31;
568 }
ccd979bd 569# else
5a254031
MF		 570 /*
571 * We are limited by the size of sector_t. Use block size, as
572 * that's what we expose to the VFS.
573 */
574 bytes = 1 << bbits;
575 trim = 1;
576 bitshift = 31;
ccd979bd
MF		 577# endif
578#endif
579
5a254031
MF		 580 /*
581 * Trim by a whole cluster when we can actually approach the
582 * on-disk limits. Otherwise we can overflow i_clusters when
583 * an extent start is at the max offset.
584 */
585 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 586}
587
588static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
589{
590 int incompat_features;
591 int ret = 0;
c0123ade 592 struct mount_options parsed_options;
ccd979bd
MF		 593 struct ocfs2_super *osb = OCFS2_SB(sb);
594
337eb00a
AIB		 595 lock_kernel();
596
c0123ade 597 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
ccd979bd
MF		 598 ret = -EINVAL;
599 goto out;
600 }
601
602 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
c0123ade 603 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
ccd979bd
MF		 604 ret = -EINVAL;
605 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
606 goto out;
607 }
608
609 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 610 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 611 ret = -EINVAL;
612 mlog(ML_ERROR, "Cannot change data mode on remount\n");
613 goto out;
614 }
615
12462f1d
JB		 616 /* Probably don't want this on remount; it might
617 * mess with other nodes */
618 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
619 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
620 ret = -EINVAL;
621 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
622 goto out;
623 }
624
ccd979bd
MF		 625 /* We're going to/from readonly mode. */
626 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
19ece546
JK		 627 /* Disable quota accounting before remounting RO */
628 if (*flags & MS_RDONLY) {
629 ret = ocfs2_susp_quotas(osb, 0);
630 if (ret < 0)
631 goto out;
632 }
ccd979bd
MF		 633 /* Lock here so the check of HARD_RO and the potential
634 * setting of SOFT_RO is atomic. */
635 spin_lock(&osb->osb_lock);
636 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
637 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
638 ret = -EROFS;
639 goto unlock_osb;
640 }
641
642 if (*flags & MS_RDONLY) {
643 mlog(0, "Going to ro mode.\n");
644 sb->s_flags |= MS_RDONLY;
645 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
646 } else {
647 mlog(0, "Making ro filesystem writeable.\n");
648
649 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
650 mlog(ML_ERROR, "Cannot remount RDWR "
651 "filesystem due to previous errors.\n");
652 ret = -EROFS;
653 goto unlock_osb;
654 }
655 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
656 if (incompat_features) {
657 mlog(ML_ERROR, "Cannot remount RDWR because "
658 "of unsupported optional features "
659 "(%x).\n", incompat_features);
660 ret = -EINVAL;
661 goto unlock_osb;
662 }
663 sb->s_flags &= ~MS_RDONLY;
664 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
665 }
666unlock_osb:
667 spin_unlock(&osb->osb_lock);
19ece546
JK		 668 /* Enable quota accounting after remounting RW */
669 if (!ret && !(*flags & MS_RDONLY)) {
670 if (sb_any_quota_suspended(sb))
671 ret = ocfs2_susp_quotas(osb, 1);
672 else
673 ret = ocfs2_enable_quotas(osb);
674 if (ret < 0) {
675 /* Return back changes... */
676 spin_lock(&osb->osb_lock);
677 sb->s_flags |= MS_RDONLY;
678 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
679 spin_unlock(&osb->osb_lock);
680 goto out;
681 }
682 }
ccd979bd
MF		 683 }
684
685 if (!ret) {
ccd979bd
MF		 686 /* Only save off the new mount options in case of a successful
687 * remount. */
a68979b8
TY		 688 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
689 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
c0123ade
TY		 690 osb->s_mount_opt = parsed_options.mount_opt;
691 osb->s_atime_quantum = parsed_options.atime_quantum;
692 osb->preferred_slot = parsed_options.slot;
d147b3d6
MF		 693 if (parsed_options.commit_interval)
694 osb->osb_commit_interval = parsed_options.commit_interval;
e001e796
MF		 695
696 if (!ocfs2_is_hard_readonly(osb))
697 ocfs2_set_journal_params(osb);
ccd979bd
MF		 698 }
699out:
337eb00a 700 unlock_kernel();
ccd979bd
MF		 701 return ret;
702}
703
704static int ocfs2_sb_probe(struct super_block *sb,
705 struct buffer_head **bh,
73be192b
JB		 706 int *sector_size,
707 struct ocfs2_blockcheck_stats *stats)
ccd979bd 708{
bddb8eb3 709 int status, tmpstat;
ccd979bd
MF		 710 struct ocfs1_vol_disk_hdr *hdr;
711 struct ocfs2_dinode *di;
712 int blksize;
713
714 *bh = NULL;
715
716 /* may be > 512 */
e1defc4f 717 *sector_size = bdev_logical_block_size(sb->s_bdev);
ccd979bd
MF		 718 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
719 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
720 *sector_size, OCFS2_MAX_BLOCKSIZE);
721 status = -EINVAL;
722 goto bail;
723 }
724
725 /* Can this really happen? */
726 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
727 *sector_size = OCFS2_MIN_BLOCKSIZE;
728
729 /* check block zero for old format */
730 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
731 if (status < 0) {
732 mlog_errno(status);
733 goto bail;
734 }
735 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
736 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
737 mlog(ML_ERROR, "incompatible version: %u.%u\n",
738 hdr->major_version, hdr->minor_version);
739 status = -EINVAL;
740 }
741 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
742 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
743 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
744 hdr->signature);
745 status = -EINVAL;
746 }
747 brelse(*bh);
748 *bh = NULL;
749 if (status < 0) {
750 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
751 "upgraded before mounting with ocfs v2\n");
752 goto bail;
753 }
754
755 /*
756 * Now check at magic offset for 512, 1024, 2048, 4096
757 * blocksizes. 4096 is the maximum blocksize because it is
758 * the minimum clustersize.
759 */
760 status = -EINVAL;
761 for (blksize = *sector_size;
762 blksize <= OCFS2_MAX_BLOCKSIZE;
763 blksize <<= 1) {
764 tmpstat = ocfs2_get_sector(sb, bh,
765 OCFS2_SUPER_BLOCK_BLKNO,
766 blksize);
767 if (tmpstat < 0) {
768 status = tmpstat;
769 mlog_errno(status);
770 goto bail;
771 }
772 di = (struct ocfs2_dinode *) (*bh)->b_data;
73be192b
JB		 773 memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
774 status = ocfs2_verify_volume(di, *bh, blksize, stats);
ccd979bd
MF		 775 if (status >= 0)
776 goto bail;
777 brelse(*bh);
778 *bh = NULL;
779 if (status != -EAGAIN)
780 break;
781 }
782
783bail:
784 return status;
785}
786
c271c5c2
SM		 787static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
788{
789 if (ocfs2_mount_local(osb)) {
790 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
791 mlog(ML_ERROR, "Cannot heartbeat on a locally "
792 "mounted device.\n");
793 return -EINVAL;
794 }
795 }
796
b61817e1
JB		 797 if (ocfs2_userspace_stack(osb)) {
798 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
799 mlog(ML_ERROR, "Userspace stack expected, but "
800 "o2cb heartbeat arguments passed to mount\n");
801 return -EINVAL;
802 }
803 }
804
c271c5c2 805 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
b61817e1
JB		 806 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
807 !ocfs2_userspace_stack(osb)) {
c271c5c2
SM		 808 mlog(ML_ERROR, "Heartbeat has to be started to mount "
809 "a read-write clustered device.\n");
810 return -EINVAL;
811 }
812 }
813
814 return 0;
815}
816
b61817e1
JB		 817/*
818 * If we're using a userspace stack, mount should have passed
819 * a name that matches the disk. If not, mount should not
820 * have passed a stack.
821 */
822static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
823 struct mount_options *mopt)
824{
825 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
826 mlog(ML_ERROR,
827 "cluster stack passed to mount, but this filesystem "
828 "does not support it\n");
829 return -EINVAL;
830 }
831
832 if (ocfs2_userspace_stack(osb) &&
833 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
834 OCFS2_STACK_LABEL_LEN)) {
835 mlog(ML_ERROR,
836 "cluster stack passed to mount (\"%s\") does not "
837 "match the filesystem (\"%s\")\n",
838 mopt->cluster_stack,
839 osb->osb_cluster_stack);
840 return -EINVAL;
841 }
842
843 return 0;
844}
845
19ece546
JK		 846static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
847{
848 int type;
849 struct super_block *sb = osb->sb;
850 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
851 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
852 int status = 0;
853
854 for (type = 0; type < MAXQUOTAS; type++) {
855 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
856 continue;
857 if (unsuspend)
858 status = vfs_quota_enable(
859 sb_dqopt(sb)->files[type],
860 type, QFMT_OCFS2,
861 DQUOT_SUSPENDED);
862 else
863 status = vfs_quota_disable(sb, type,
864 DQUOT_SUSPENDED);
865 if (status < 0)
866 break;
867 }
868 if (status < 0)
869 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
870 "remount (error = %d).\n", status);
871 return status;
872}
873
874static int ocfs2_enable_quotas(struct ocfs2_super *osb)
875{
876 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
877 struct super_block *sb = osb->sb;
878 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
879 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
880 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
881 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
882 int status;
883 int type;
884
885 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
886 for (type = 0; type < MAXQUOTAS; type++) {
887 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
888 continue;
889 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
890 osb->slot_num);
891 if (!inode[type]) {
892 status = -ENOENT;
893 goto out_quota_off;
894 }
895 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2,
896 DQUOT_USAGE_ENABLED);
897 if (status < 0)
898 goto out_quota_off;
899 }
900
901 for (type = 0; type < MAXQUOTAS; type++)
902 iput(inode[type]);
903 return 0;
904out_quota_off:
905 ocfs2_disable_quotas(osb);
906 for (type = 0; type < MAXQUOTAS; type++)
907 iput(inode[type]);
908 mlog_errno(status);
909 return status;
910}
911
912static void ocfs2_disable_quotas(struct ocfs2_super *osb)
913{
914 int type;
915 struct inode *inode;
916 struct super_block *sb = osb->sb;
917
918 /* We mostly ignore errors in this function because there's not much
919 * we can do when we see them */
920 for (type = 0; type < MAXQUOTAS; type++) {
921 if (!sb_has_quota_loaded(sb, type))
922 continue;
923 inode = igrab(sb->s_dquot.files[type]);
924 /* Turn off quotas. This will remove all dquot structures from
925 * memory and so they will be automatically synced to global
926 * quota files */
927 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED |
928 DQUOT_LIMITS_ENABLED);
929 if (!inode)
930 continue;
931 iput(inode);
932 }
933}
934
935/* Handle quota on quotactl */
936static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
937 char *path, int remount)
938{
939 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
940 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
941
942 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
943 return -EINVAL;
944
945 if (remount)
946 return 0; /* Just ignore it has been handled in
947 * ocfs2_remount() */
948 return vfs_quota_enable(sb_dqopt(sb)->files[type], type,
949 format_id, DQUOT_LIMITS_ENABLED);
950}
951
952/* Handle quota off quotactl */
953static int ocfs2_quota_off(struct super_block *sb, int type, int remount)
954{
955 if (remount)
956 return 0; /* Ignore now and handle later in
957 * ocfs2_remount() */
958 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
959}
960
961static struct quotactl_ops ocfs2_quotactl_ops = {
962 .quota_on = ocfs2_quota_on,
963 .quota_off = ocfs2_quota_off,
964 .quota_sync = vfs_quota_sync,
965 .get_info = vfs_get_dqinfo,
966 .set_info = vfs_set_dqinfo,
967 .get_dqblk = vfs_get_dqblk,
968 .set_dqblk = vfs_set_dqblk,
969};
970
ccd979bd
MF		 971static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
972{
973 struct dentry *root;
974 int status, sector_size;
c0123ade 975 struct mount_options parsed_options;
ccd979bd
MF		 976 struct inode *inode = NULL;
977 struct ocfs2_super *osb = NULL;
978 struct buffer_head *bh = NULL;
c271c5c2 979 char nodestr[8];
73be192b 980 struct ocfs2_blockcheck_stats stats;
ccd979bd
MF		 981
982 mlog_entry("%p, %p, %i", sb, data, silent);
983
c0123ade 984 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 985 status = -EINVAL;
986 goto read_super_error;
987 }
988
989 /* probe for superblock */
73be192b 990 status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
ccd979bd
MF		 991 if (status < 0) {
992 mlog(ML_ERROR, "superblock probe failed!\n");
993 goto read_super_error;
994 }
995
73be192b 996 status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
ccd979bd
MF		 997 osb = OCFS2_SB(sb);
998 if (status < 0) {
999 mlog_errno(status);
1000 goto read_super_error;
1001 }
1002 brelse(bh);
1003 bh = NULL;
a68979b8
TY		 1004
1005 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
1006 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1007
c0123ade
TY		 1008 osb->s_mount_opt = parsed_options.mount_opt;
1009 osb->s_atime_quantum = parsed_options.atime_quantum;
1010 osb->preferred_slot = parsed_options.slot;
d147b3d6 1011 osb->osb_commit_interval = parsed_options.commit_interval;
9c7af40b
MF		 1012 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
1013 osb->local_alloc_bits = osb->local_alloc_default_bits;
19ece546
JK		 1014 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA &&
1015 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1016 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1017 status = -EINVAL;
1018 mlog(ML_ERROR, "User quotas were requested, but this "
1019 "filesystem does not have the feature enabled.\n");
1020 goto read_super_error;
1021 }
1022 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA &&
1023 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1024 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1025 status = -EINVAL;
1026 mlog(ML_ERROR, "Group quotas were requested, but this "
1027 "filesystem does not have the feature enabled.\n");
1028 goto read_super_error;
1029 }
ccd979bd 1030
b61817e1
JB		 1031 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
1032 if (status)
1033 goto read_super_error;
1034
ccd979bd
MF		 1035 sb->s_magic = OCFS2_SUPER_MAGIC;
1036
a68979b8
TY		 1037 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1038 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1039
ccd979bd
MF		 1040 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
1041 * heartbeat=none */
1042 if (bdev_read_only(sb->s_bdev)) {
1043 if (!(sb->s_flags & MS_RDONLY)) {
1044 status = -EACCES;
1045 mlog(ML_ERROR, "Readonly device detected but readonly "
1046 "mount was not specified.\n");
1047 goto read_super_error;
1048 }
1049
1050 /* You should not be able to start a local heartbeat
1051 * on a readonly device. */
1052 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
1053 status = -EROFS;
1054 mlog(ML_ERROR, "Local heartbeat specified on readonly "
1055 "device.\n");
1056 goto read_super_error;
1057 }
1058
1059 status = ocfs2_check_journals_nolocks(osb);
1060 if (status < 0) {
1061 if (status == -EROFS)
1062 mlog(ML_ERROR, "Recovery required on readonly "
1063 "file system, but write access is "
1064 "unavailable.\n");
1065 else
1066 mlog_errno(status);
1067 goto read_super_error;
1068 }
1069
1070 ocfs2_set_ro_flag(osb, 1);
1071
1072 printk(KERN_NOTICE "Readonly device detected. No cluster "
1073 "services will be utilized for this mount. Recovery "
1074 "will be skipped.\n");
1075 }
1076
1077 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 1078 if (sb->s_flags & MS_RDONLY)
1079 ocfs2_set_ro_flag(osb, 0);
1080 }
1081
c271c5c2
SM		 1082 status = ocfs2_verify_heartbeat(osb);
1083 if (status < 0) {
1084 mlog_errno(status);
1085 goto read_super_error;
1086 }
1087
ccd979bd
MF		 1088 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
1089 ocfs2_debugfs_root);
1090 if (!osb->osb_debug_root) {
1091 status = -EINVAL;
1092 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
1093 goto read_super_error;
1094 }
1095
50397507
SM		 1096 osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
1097 osb->osb_debug_root,
1098 osb,
1099 &ocfs2_osb_debug_fops);
1100 if (!osb->osb_ctxt) {
1101 status = -EINVAL;
1102 mlog_errno(status);
1103 goto read_super_error;
1104 }
1105
73be192b
JB		 1106 if (ocfs2_meta_ecc(osb)) {
1107 status = ocfs2_blockcheck_stats_debugfs_install(
1108 &osb->osb_ecc_stats,
1109 osb->osb_debug_root);
1110 if (status) {
1111 mlog(ML_ERROR,
1112 "Unable to create blockcheck statistics "
1113 "files\n");
1114 goto read_super_error;
1115 }
1116 }
1117
ccd979bd
MF		 1118 status = ocfs2_mount_volume(sb);
1119 if (osb->root_inode)
1120 inode = igrab(osb->root_inode);
1121
1122 if (status < 0)
1123 goto read_super_error;
1124
1125 if (!inode) {
1126 status = -EIO;
1127 mlog_errno(status);
1128 goto read_super_error;
1129 }
1130
1131 root = d_alloc_root(inode);
1132 if (!root) {
1133 status = -ENOMEM;
1134 mlog_errno(status);
1135 goto read_super_error;
1136 }
1137
1138 sb->s_root = root;
1139
1140 ocfs2_complete_mount_recovery(osb);
1141
c271c5c2
SM		 1142 if (ocfs2_mount_local(osb))
1143 snprintf(nodestr, sizeof(nodestr), "local");
1144 else
19fdb624 1145 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1146
1147 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 1148 "with %s data mode.\n",
c271c5c2 1149 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 1150 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
1151 "ordered");
1152
1153 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
1154 wake_up(&osb->osb_mount_event);
1155
19ece546
JK		 1156 /* Now we can initialize quotas because we can afford to wait
1157 * for cluster locks recovery now. That also means that truncation
1158 * log recovery can happen but that waits for proper quota setup */
1159 if (!(sb->s_flags & MS_RDONLY)) {
1160 status = ocfs2_enable_quotas(osb);
1161 if (status < 0) {
1162 /* We have to err-out specially here because
1163 * s_root is already set */
1164 mlog_errno(status);
1165 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1166 wake_up(&osb->osb_mount_event);
1167 mlog_exit(status);
1168 return status;
1169 }
1170 }
1171
1172 ocfs2_complete_quota_recovery(osb);
1173
1174 /* Now we wake up again for processes waiting for quotas */
1175 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
1176 wake_up(&osb->osb_mount_event);
1177
ccd979bd
MF		 1178 mlog_exit(status);
1179 return status;
1180
1181read_super_error:
a81cb88b 1182 brelse(bh);
ccd979bd
MF		 1183
1184 if (inode)
1185 iput(inode);
1186
1187 if (osb) {
1188 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1189 wake_up(&osb->osb_mount_event);
1190 ocfs2_dismount_volume(sb, 1);
1191 }
1192
1193 mlog_exit(status);
1194 return status;
1195}
1196
454e2398
DH		 1197static int ocfs2_get_sb(struct file_system_type *fs_type,
1198 int flags,
1199 const char *dev_name,
1200 void *data,
1201 struct vfsmount *mnt)
ccd979bd 1202{
454e2398
DH		 1203 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1204 mnt);
ccd979bd
MF		 1205}
1206
1207static struct file_system_type ocfs2_fs_type = {
1208 .owner = THIS_MODULE,
1209 .name = "ocfs2",
1210 .get_sb = ocfs2_get_sb, /* is this called when we mount
1211 * the fs? */
1212 .kill_sb = kill_block_super, /* set to the generic one
1213 * right now, but do we
1214 * need to change that? */
1ba9da2f 1215 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 1216 .next = NULL
1217};
1218
1219static int ocfs2_parse_options(struct super_block *sb,
1220 char *options,
c0123ade 1221 struct mount_options *mopt,
ccd979bd
MF		 1222 int is_remount)
1223{
1224 int status;
1225 char *p;
1226
1227 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1228 options ? options : "(none)");
1229
d147b3d6 1230 mopt->commit_interval = 0;
c0123ade
TY		 1231 mopt->mount_opt = 0;
1232 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1233 mopt->slot = OCFS2_INVALID_SLOT;
2fbe8d1e 1234 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
b61817e1 1235 mopt->cluster_stack[0] = '\0';
ccd979bd
MF		 1236
1237 if (!options) {
1238 status = 1;
1239 goto bail;
1240 }
1241
1242 while ((p = strsep(&options, ",")) != NULL) {
1243 int token, option;
1244 substring_t args[MAX_OPT_ARGS];
1245
1246 if (!*p)
1247 continue;
1248
1249 token = match_token(p, tokens, args);
1250 switch (token) {
1251 case Opt_hb_local:
c0123ade 1252 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 1253 break;
1254 case Opt_hb_none:
c0123ade 1255 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 1256 break;
1257 case Opt_barrier:
1258 if (match_int(&args[0], &option)) {
1259 status = 0;
1260 goto bail;
1261 }
1262 if (option)
c0123ade 1263 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 1264 else
c0123ade 1265 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 1266 break;
1267 case Opt_intr:
c0123ade 1268 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1269 break;
1270 case Opt_nointr:
c0123ade 1271 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 1272 break;
1273 case Opt_err_panic:
c0123ade 1274 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1275 break;
1276 case Opt_err_ro:
c0123ade 1277 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 1278 break;
1279 case Opt_data_ordered:
c0123ade 1280 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 1281 break;
1282 case Opt_data_writeback:
c0123ade 1283 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 1284 break;
cf1d6c76
TY		 1285 case Opt_user_xattr:
1286 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1287 break;
1288 case Opt_nouser_xattr:
1289 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1290 break;
7f1a37e3
TY		 1291 case Opt_atime_quantum:
1292 if (match_int(&args[0], &option)) {
1293 status = 0;
1294 goto bail;
1295 }
1296 if (option >= 0)
c0123ade 1297 mopt->atime_quantum = option;
7f1a37e3 1298 break;
baf4661a
SM		 1299 case Opt_slot:
1300 option = 0;
1301 if (match_int(&args[0], &option)) {
1302 status = 0;
1303 goto bail;
1304 }
1305 if (option)
c0123ade 1306 mopt->slot = (s16)option;
baf4661a 1307 break;
d147b3d6
MF		 1308 case Opt_commit:
1309 option = 0;
1310 if (match_int(&args[0], &option)) {
1311 status = 0;
1312 goto bail;
1313 }
1314 if (option < 0)
1315 return 0;
1316 if (option == 0)
2b4e30fb 1317 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
d147b3d6
MF		 1318 mopt->commit_interval = HZ * option;
1319 break;
2fbe8d1e
SM		 1320 case Opt_localalloc:
1321 option = 0;
1322 if (match_int(&args[0], &option)) {
1323 status = 0;
1324 goto bail;
1325 }
1326 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
1327 mopt->localalloc_opt = option;
1328 break;
53fc622b
MF		 1329 case Opt_localflocks:
1330 /*
1331 * Changing this during remount could race
1332 * flock() requests, or "unbalance" existing
1333 * ones (e.g., a lock is taken in one mode but
1334 * dropped in the other). If users care enough
1335 * to flip locking modes during remount, we
1336 * could add a "local" flag to individual
1337 * flock structures for proper tracking of
1338 * state.
1339 */
1340 if (!is_remount)
1341 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1342 break;
b61817e1
JB		 1343 case Opt_stack:
1344 /* Check both that the option we were passed
1345 * is of the right length and that it is a proper
1346 * string of the right length.
1347 */
1348 if (((args[0].to - args[0].from) !=
1349 OCFS2_STACK_LABEL_LEN) ||
1350 (strnlen(args[0].from,
1351 OCFS2_STACK_LABEL_LEN) !=
1352 OCFS2_STACK_LABEL_LEN)) {
1353 mlog(ML_ERROR,
1354 "Invalid cluster_stack option\n");
1355 status = 0;
1356 goto bail;
1357 }
1358 memcpy(mopt->cluster_stack, args[0].from,
1359 OCFS2_STACK_LABEL_LEN);
1360 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1361 break;
12462f1d
JB		 1362 case Opt_inode64:
1363 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1364 break;
19ece546
JK		 1365 case Opt_usrquota:
1366 /* We check only on remount, otherwise features
1367 * aren't yet initialized. */
1368 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1369 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1370 mlog(ML_ERROR, "User quota requested but "
1371 "filesystem feature is not set\n");
1372 status = 0;
1373 goto bail;
1374 }
1375 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1376 break;
1377 case Opt_grpquota:
1378 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1379 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1380 mlog(ML_ERROR, "Group quota requested but "
1381 "filesystem feature is not set\n");
1382 status = 0;
1383 goto bail;
1384 }
1385 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1386 break;
a68979b8
TY		 1387#ifdef CONFIG_OCFS2_FS_POSIX_ACL
1388 case Opt_acl:
1389 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1390 break;
1391 case Opt_noacl:
1392 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1393 break;
1394#else
1395 case Opt_acl:
1396 case Opt_noacl:
1397 printk(KERN_INFO "ocfs2 (no)acl options not supported\n");
1398 break;
1399#endif
ccd979bd
MF		 1400 default:
1401 mlog(ML_ERROR,
1402 "Unrecognized mount option \"%s\" "
1403 "or missing value\n", p);
1404 status = 0;
1405 goto bail;
1406 }
1407 }
1408
1409 status = 1;
1410
1411bail:
1412 mlog_exit(status);
1413 return status;
1414}
1415
d550071c
SM		 1416static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1417{
1418 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1419 unsigned long opts = osb->s_mount_opt;
ebcee4b5 1420 unsigned int local_alloc_megs;
d550071c
SM		 1421
1422 if (opts & OCFS2_MOUNT_HB_LOCAL)
1423 seq_printf(s, ",_netdev,heartbeat=local");
1424 else
1425 seq_printf(s, ",heartbeat=none");
1426
1427 if (opts & OCFS2_MOUNT_NOINTR)
1428 seq_printf(s, ",nointr");
1429
1430 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1431 seq_printf(s, ",data=writeback");
1432 else
1433 seq_printf(s, ",data=ordered");
1434
1435 if (opts & OCFS2_MOUNT_BARRIER)
1436 seq_printf(s, ",barrier=1");
1437
1438 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1439 seq_printf(s, ",errors=panic");
1440 else
1441 seq_printf(s, ",errors=remount-ro");
1442
1443 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1444 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1445
1446 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1447 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1448
d147b3d6
MF		 1449 if (osb->osb_commit_interval)
1450 seq_printf(s, ",commit=%u",
1451 (unsigned) (osb->osb_commit_interval / HZ));
1452
ebcee4b5
MF		 1453 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1454 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1455 seq_printf(s, ",localalloc=%d", local_alloc_megs);
2fbe8d1e 1456
53fc622b
MF		 1457 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1458 seq_printf(s, ",localflocks,");
1459
b61817e1
JB		 1460 if (osb->osb_cluster_stack[0])
1461 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1462 osb->osb_cluster_stack);
19ece546
JK		 1463 if (opts & OCFS2_MOUNT_USRQUOTA)
1464 seq_printf(s, ",usrquota");
1465 if (opts & OCFS2_MOUNT_GRPQUOTA)
1466 seq_printf(s, ",grpquota");
b61817e1 1467
b0f73cfc
SM		 1468 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1469 seq_printf(s, ",nouser_xattr");
1470 else
1471 seq_printf(s, ",user_xattr");
1472
12462f1d
JB		 1473 if (opts & OCFS2_MOUNT_INODE64)
1474 seq_printf(s, ",inode64");
1475
a68979b8
TY		 1476#ifdef CONFIG_OCFS2_FS_POSIX_ACL
1477 if (opts & OCFS2_MOUNT_POSIX_ACL)
1478 seq_printf(s, ",acl");
1479 else
1480 seq_printf(s, ",noacl");
1481#endif
1482
d550071c
SM		 1483 return 0;
1484}
1485
ccd979bd
MF		 1486static int __init ocfs2_init(void)
1487{
1488 int status;
1489
1490 mlog_entry_void();
1491
1492 ocfs2_print_version();
1493
ccd979bd
MF		 1494 status = init_ocfs2_uptodate_cache();
1495 if (status < 0) {
1496 mlog_errno(status);
1497 goto leave;
1498 }
1499
1500 status = ocfs2_initialize_mem_caches();
1501 if (status < 0) {
1502 mlog_errno(status);
1503 goto leave;
1504 }
1505
1506 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1507 if (!ocfs2_wq) {
1508 status = -ENOMEM;
1509 goto leave;
1510 }
1511
ccd979bd
MF		 1512 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1513 if (!ocfs2_debugfs_root) {
1514 status = -EFAULT;
1515 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1516 }
1517
171bf93c
MF		 1518 status = ocfs2_quota_setup();
1519 if (status)
1520 goto leave;
1521
63e0c48a
JB		 1522 ocfs2_set_locking_protocol();
1523
9e33d69f 1524 status = register_quota_format(&ocfs2_quota_format);
ccd979bd
MF		 1525leave:
1526 if (status < 0) {
171bf93c 1527 ocfs2_quota_shutdown();
ccd979bd
MF		 1528 ocfs2_free_mem_caches();
1529 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 1530 }
1531
1532 mlog_exit(status);
1533
1534 if (status >= 0) {
1535 return register_filesystem(&ocfs2_fs_type);
1536 } else
1537 return -1;
1538}
1539
1540static void __exit ocfs2_exit(void)
1541{
1542 mlog_entry_void();
1543
171bf93c
MF		 1544 ocfs2_quota_shutdown();
1545
ccd979bd
MF		 1546 if (ocfs2_wq) {
1547 flush_workqueue(ocfs2_wq);
1548 destroy_workqueue(ocfs2_wq);
1549 }
1550
9e33d69f
JK		 1551 unregister_quota_format(&ocfs2_quota_format);
1552
ccd979bd
MF		 1553 debugfs_remove(ocfs2_debugfs_root);
1554
1555 ocfs2_free_mem_caches();
1556
1557 unregister_filesystem(&ocfs2_fs_type);
1558
ccd979bd
MF		 1559 exit_ocfs2_uptodate_cache();
1560
1561 mlog_exit_void();
1562}
1563
1564static void ocfs2_put_super(struct super_block *sb)
1565{
1566 mlog_entry("(0x%p)\n", sb);
1567
6cfd0148
CH		 1568 lock_kernel();
1569
ccd979bd
MF		 1570 ocfs2_sync_blockdev(sb);
1571 ocfs2_dismount_volume(sb, 0);
1572
6cfd0148
CH		 1573 unlock_kernel();
1574
ccd979bd
MF		 1575 mlog_exit_void();
1576}
1577
726c3342 1578static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 1579{
1580 struct ocfs2_super *osb;
1581 u32 numbits, freebits;
1582 int status;
1583 struct ocfs2_dinode *bm_lock;
1584 struct buffer_head *bh = NULL;
1585 struct inode *inode = NULL;
1586
726c3342 1587 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
ccd979bd 1588
726c3342 1589 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 1590
1591 inode = ocfs2_get_system_file_inode(osb,
1592 GLOBAL_BITMAP_SYSTEM_INODE,
1593 OCFS2_INVALID_SLOT);
1594 if (!inode) {
1595 mlog(ML_ERROR, "failed to get bitmap inode\n");
1596 status = -EIO;
1597 goto bail;
1598 }
1599
e63aecb6 1600 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1601 if (status < 0) {
1602 mlog_errno(status);
1603 goto bail;
1604 }
1605
1606 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1607
1608 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1609 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1610
1611 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1612 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1613 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1614 buf->f_blocks = ((sector_t) numbits) *
1615 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1616 buf->f_bfree = ((sector_t) freebits) *
1617 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1618 buf->f_bavail = buf->f_bfree;
1619 buf->f_files = numbits;
1620 buf->f_ffree = freebits;
1621
1622 brelse(bh);
1623
e63aecb6 1624 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1625 status = 0;
1626bail:
1627 if (inode)
1628 iput(inode);
1629
1630 mlog_exit(status);
1631
1632 return status;
1633}
1634
51cc5068 1635static void ocfs2_inode_init_once(void *data)
ccd979bd
MF		 1636{
1637 struct ocfs2_inode_info *oi = data;
1638
a35afb83
CL		 1639 oi->ip_flags = 0;
1640 oi->ip_open_count = 0;
1641 spin_lock_init(&oi->ip_lock);
1642 ocfs2_extent_map_init(&oi->vfs_inode);
1643 INIT_LIST_HEAD(&oi->ip_io_markers);
1644 oi->ip_created_trans = 0;
1645 oi->ip_last_trans = 0;
1646 oi->ip_dir_start_lookup = 0;
ccd979bd 1647
a35afb83 1648 init_rwsem(&oi->ip_alloc_sem);
cf1d6c76 1649 init_rwsem(&oi->ip_xattr_sem);
a35afb83 1650 mutex_init(&oi->ip_io_mutex);
ccd979bd 1651
a35afb83
CL		 1652 oi->ip_blkno = 0ULL;
1653 oi->ip_clusters = 0;
ccd979bd 1654
a35afb83 1655 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1656 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1657 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1658
a35afb83 1659 ocfs2_metadata_cache_init(&oi->vfs_inode);
ccd979bd 1660
a35afb83 1661 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1662}
1663
1664static int ocfs2_initialize_mem_caches(void)
1665{
1666 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1667 sizeof(struct ocfs2_inode_info),
1668 0,
1669 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1670 SLAB_MEM_SPREAD),
20c2df83 1671 ocfs2_inode_init_once);
9e33d69f
JK		 1672 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1673 sizeof(struct ocfs2_dquot),
1674 0,
1675 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1676 SLAB_MEM_SPREAD),
1677 NULL);
1678 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1679 sizeof(struct ocfs2_quota_chunk),
1680 0,
1681 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1682 NULL);
1683 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1684 !ocfs2_qf_chunk_cachep) {
1685 if (ocfs2_inode_cachep)
1686 kmem_cache_destroy(ocfs2_inode_cachep);
1687 if (ocfs2_dquot_cachep)
1688 kmem_cache_destroy(ocfs2_dquot_cachep);
1689 if (ocfs2_qf_chunk_cachep)
1690 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
ccd979bd 1691 return -ENOMEM;
9e33d69f 1692 }
ccd979bd 1693
ccd979bd
MF		 1694 return 0;
1695}
1696
1697static void ocfs2_free_mem_caches(void)
1698{
1699 if (ocfs2_inode_cachep)
1700 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd 1701 ocfs2_inode_cachep = NULL;
9e33d69f
JK		 1702
1703 if (ocfs2_dquot_cachep)
1704 kmem_cache_destroy(ocfs2_dquot_cachep);
1705 ocfs2_dquot_cachep = NULL;
1706
1707 if (ocfs2_qf_chunk_cachep)
1708 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1709 ocfs2_qf_chunk_cachep = NULL;
ccd979bd
MF		 1710}
1711
1712static int ocfs2_get_sector(struct super_block *sb,
1713 struct buffer_head **bh,
1714 int block,
1715 int sect_size)
1716{
1717 if (!sb_set_blocksize(sb, sect_size)) {
1718 mlog(ML_ERROR, "unable to set blocksize\n");
1719 return -EIO;
1720 }
1721
1722 *bh = sb_getblk(sb, block);
1723 if (!*bh) {
1724 mlog_errno(-EIO);
1725 return -EIO;
1726 }
1727 lock_buffer(*bh);
1728 if (!buffer_dirty(*bh))
1729 clear_buffer_uptodate(*bh);
1730 unlock_buffer(*bh);
1731 ll_rw_block(READ, 1, bh);
1732 wait_on_buffer(*bh);
28d57d43 1733 if (!buffer_uptodate(*bh)) {
1734 mlog_errno(-EIO);
1735 brelse(*bh);
1736 *bh = NULL;
1737 return -EIO;
1738 }
1739
ccd979bd
MF		 1740 return 0;
1741}
1742
ccd979bd
MF		 1743static int ocfs2_mount_volume(struct super_block *sb)
1744{
1745 int status = 0;
1746 int unlock_super = 0;
1747 struct ocfs2_super *osb = OCFS2_SB(sb);
1748
1749 mlog_entry_void();
1750
1751 if (ocfs2_is_hard_readonly(osb))
1752 goto leave;
1753
ccd979bd
MF		 1754 status = ocfs2_dlm_init(osb);
1755 if (status < 0) {
1756 mlog_errno(status);
1757 goto leave;
1758 }
1759
ccd979bd
MF		 1760 status = ocfs2_super_lock(osb, 1);
1761 if (status < 0) {
1762 mlog_errno(status);
1763 goto leave;
1764 }
1765 unlock_super = 1;
1766
1767 /* This will load up the node map and add ourselves to it. */
1768 status = ocfs2_find_slot(osb);
1769 if (status < 0) {
1770 mlog_errno(status);
1771 goto leave;
1772 }
1773
ccd979bd
MF		 1774 /* load all node-local system inodes */
1775 status = ocfs2_init_local_system_inodes(osb);
1776 if (status < 0) {
1777 mlog_errno(status);
1778 goto leave;
1779 }
1780
1781 status = ocfs2_check_volume(osb);
1782 if (status < 0) {
1783 mlog_errno(status);
1784 goto leave;
1785 }
1786
1787 status = ocfs2_truncate_log_init(osb);
06c59bb8 1788 if (status < 0)
ccd979bd 1789 mlog_errno(status);
c271c5c2 1790
ccd979bd
MF		 1791leave:
1792 if (unlock_super)
1793 ocfs2_super_unlock(osb, 1);
1794
1795 mlog_exit(status);
1796 return status;
1797}
1798
ccd979bd
MF		 1799static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1800{
286eaa95 1801 int tmp, hangup_needed = 0;
ccd979bd 1802 struct ocfs2_super *osb = NULL;
c271c5c2 1803 char nodestr[8];
ccd979bd
MF		 1804
1805 mlog_entry("(0x%p)\n", sb);
1806
1807 BUG_ON(!sb);
1808 osb = OCFS2_SB(sb);
1809 BUG_ON(!osb);
1810
50397507
SM		 1811 debugfs_remove(osb->osb_ctxt);
1812
19ece546
JK		 1813 ocfs2_disable_quotas(osb);
1814
ccd979bd
MF		 1815 ocfs2_shutdown_local_alloc(osb);
1816
1817 ocfs2_truncate_log_shutdown(osb);
1818
83273932
SE		 1819 ocfs2_orphan_scan_stop(osb);
1820
553abd04
JB		 1821 /* This will disable recovery and flush any recovery work. */
1822 ocfs2_recovery_exit(osb);
ccd979bd
MF		 1823
1824 ocfs2_journal_shutdown(osb);
1825
1826 ocfs2_sync_blockdev(sb);
1827
4670c46d
JB		 1828 /* No cluster connection means we've failed during mount, so skip
1829 * all the steps which depended on that to complete. */
1830 if (osb->cconn) {
ccd979bd
MF		 1831 tmp = ocfs2_super_lock(osb, 1);
1832 if (tmp < 0) {
1833 mlog_errno(tmp);
1834 return;
1835 }
19b613d4 1836 }
ccd979bd 1837
19b613d4
MF		 1838 if (osb->slot_num != OCFS2_INVALID_SLOT)
1839 ocfs2_put_slot(osb);
ccd979bd 1840
4670c46d 1841 if (osb->cconn)
ccd979bd 1842 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1843
1844 ocfs2_release_system_inodes(osb);
1845
6953b4c0 1846 /*
6953b4c0
JB		 1847 * If we're dismounting due to mount error, mount.ocfs2 will clean
1848 * up heartbeat. If we're a local mount, there is no heartbeat.
1849 * If we failed before we got a uuid_str yet, we can't stop
1850 * heartbeat. Otherwise, do it.
1851 */
1852 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
286eaa95
JB		 1853 hangup_needed = 1;
1854
1855 if (osb->cconn)
1856 ocfs2_dlm_shutdown(osb, hangup_needed);
1857
73be192b 1858 ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
286eaa95
JB		 1859 debugfs_remove(osb->osb_debug_root);
1860
1861 if (hangup_needed)
6953b4c0 1862 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
ccd979bd
MF		 1863
1864 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1865
c271c5c2
SM		 1866 if (ocfs2_mount_local(osb))
1867 snprintf(nodestr, sizeof(nodestr), "local");
1868 else
19fdb624 1869 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1870
1871 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1872 osb->dev_str, nodestr);
ccd979bd
MF		 1873
1874 ocfs2_delete_osb(osb);
1875 kfree(osb);
1876 sb->s_dev = 0;
1877 sb->s_fs_info = NULL;
1878}
1879
1880static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1881 unsigned uuid_bytes)
1882{
1883 int i, ret;
1884 char *ptr;
1885
1886 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1887
cd861280 1888 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 1889 if (osb->uuid_str == NULL)
1890 return -ENOMEM;
1891
ccd979bd
MF		 1892 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1893 /* print with null */
1894 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1895 if (ret != 2) /* drop super cleans up */
1896 return -EINVAL;
1897 /* then only advance past the last char */
1898 ptr += 2;
1899 }
1900
1901 return 0;
1902}
1903
1904static int ocfs2_initialize_super(struct super_block *sb,
1905 struct buffer_head *bh,
73be192b
JB		 1906 int sector_size,
1907 struct ocfs2_blockcheck_stats *stats)
ccd979bd 1908{
bddb8eb3 1909 int status;
5a254031
MF		 1910 int i, cbits, bbits;
1911 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 1912 struct inode *inode = NULL;
ccd979bd
MF		 1913 struct ocfs2_journal *journal;
1914 __le32 uuid_net_key;
1915 struct ocfs2_super *osb;
1916
1917 mlog_entry_void();
1918
cd861280 1919 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 1920 if (!osb) {
1921 status = -ENOMEM;
1922 mlog_errno(status);
1923 goto bail;
1924 }
1925
1926 sb->s_fs_info = osb;
1927 sb->s_op = &ocfs2_sops;
1928 sb->s_export_op = &ocfs2_export_ops;
19ece546
JK		 1929 sb->s_qcop = &ocfs2_quotactl_ops;
1930 sb->dq_op = &ocfs2_quota_operations;
cf1d6c76 1931 sb->s_xattr = ocfs2_xattr_handlers;
e0dceaf0 1932 sb->s_time_gran = 1;
ccd979bd
MF		 1933 sb->s_flags |= MS_NOATIME;
1934 /* this is needed to support O_LARGEFILE */
5a254031
MF		 1935 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1936 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1937 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
ccd979bd 1938
9b7895ef
MF		 1939 osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
1940
1941 for (i = 0; i < 3; i++)
1942 osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
1943 osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1944
ccd979bd
MF		 1945 osb->sb = sb;
1946 /* Save off for ocfs2_rw_direct */
1947 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 1948 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 1949
34d024f8
MF		 1950 spin_lock_init(&osb->dc_task_lock);
1951 init_waitqueue_head(&osb->dc_event);
1952 osb->dc_work_sequence = 0;
1953 osb->dc_wake_sequence = 0;
ccd979bd
MF		 1954 INIT_LIST_HEAD(&osb->blocked_lock_list);
1955 osb->blocked_lock_count = 0;
ccd979bd 1956 spin_lock_init(&osb->osb_lock);
c8b9cf9a 1957 spin_lock_init(&osb->osb_xattr_lock);
4d0ddb2c 1958 ocfs2_init_inode_steal_slot(osb);
ccd979bd
MF		 1959
1960 atomic_set(&osb->alloc_stats.moves, 0);
1961 atomic_set(&osb->alloc_stats.local_data, 0);
1962 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1963 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1964 atomic_set(&osb->alloc_stats.bg_extends, 0);
1965
73be192b
JB		 1966 /* Copy the blockcheck stats from the superblock probe */
1967 osb->osb_ecc_stats = *stats;
1968
ccd979bd
MF		 1969 ocfs2_init_node_maps(osb);
1970
1971 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1972 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1973
553abd04
JB		 1974 status = ocfs2_recovery_init(osb);
1975 if (status) {
1976 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1977 mlog_errno(status);
1978 goto bail;
1979 }
ccd979bd 1980
83273932
SE		 1981 status = ocfs2_orphan_scan_init(osb);
1982 if (status) {
1983 mlog(ML_ERROR, "Unable to initialize delayed orphan scan\n");
1984 mlog_errno(status);
1985 goto bail;
1986 }
1987
ccd979bd
MF		 1988 init_waitqueue_head(&osb->checkpoint_event);
1989 atomic_set(&osb->needs_checkpoint, 0);
1990
7f1a37e3
TY		 1991 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1992
ccd979bd
MF		 1993 osb->slot_num = OCFS2_INVALID_SLOT;
1994
8154da3d
TY		 1995 osb->s_xattr_inline_size = le16_to_cpu(
1996 di->id2.i_super.s_xattr_inline_size);
fdd77704 1997
ccd979bd
MF		 1998 osb->local_alloc_state = OCFS2_LA_UNUSED;
1999 osb->local_alloc_bh = NULL;
9c7af40b 2000 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
ccd979bd 2001
ccd979bd
MF		 2002 init_waitqueue_head(&osb->osb_mount_event);
2003
2004 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
2005 if (!osb->vol_label) {
2006 mlog(ML_ERROR, "unable to alloc vol label\n");
2007 status = -ENOMEM;
2008 goto bail;
2009 }
2010
ccd979bd
MF		 2011 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
2012 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
2013 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
2014 osb->max_slots);
2015 status = -EINVAL;
2016 goto bail;
2017 }
781ee3e2 2018 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
ccd979bd 2019
539d8264
SM		 2020 osb->slot_recovery_generations =
2021 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
2022 GFP_KERNEL);
2023 if (!osb->slot_recovery_generations) {
2024 status = -ENOMEM;
2025 mlog_errno(status);
2026 goto bail;
2027 }
2028
b4df6ed8
MF		 2029 init_waitqueue_head(&osb->osb_wipe_event);
2030 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
2031 sizeof(*osb->osb_orphan_wipes),
2032 GFP_KERNEL);
2033 if (!osb->osb_orphan_wipes) {
2034 status = -ENOMEM;
2035 mlog_errno(status);
2036 goto bail;
2037 }
2038
ccd979bd
MF		 2039 osb->s_feature_compat =
2040 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
2041 osb->s_feature_ro_compat =
2042 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
2043 osb->s_feature_incompat =
2044 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
2045
2046 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
2047 mlog(ML_ERROR, "couldn't mount because of unsupported "
2048 "optional features (%x).\n", i);
2049 status = -EINVAL;
2050 goto bail;
2051 }
2052 if (!(osb->sb->s_flags & MS_RDONLY) &&
2053 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
2054 mlog(ML_ERROR, "couldn't mount RDWR because of "
2055 "unsupported optional features (%x).\n", i);
2056 status = -EINVAL;
2057 goto bail;
2058 }
2059
b61817e1
JB		 2060 if (ocfs2_userspace_stack(osb)) {
2061 memcpy(osb->osb_cluster_stack,
2062 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
2063 OCFS2_STACK_LABEL_LEN);
2064 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
2065 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
2066 mlog(ML_ERROR,
2067 "couldn't mount because of an invalid "
2068 "cluster stack label (%s) \n",
2069 osb->osb_cluster_stack);
2070 status = -EINVAL;
2071 goto bail;
2072 }
2073 } else {
2074 /* The empty string is identical with classic tools that
2075 * don't know about s_cluster_info. */
2076 osb->osb_cluster_stack[0] = '\0';
2077 }
2078
ccd979bd
MF		 2079 get_random_bytes(&osb->s_next_generation, sizeof(u32));
2080
2081 /* FIXME
2082 * This should be done in ocfs2_journal_init(), but unknown
2083 * ordering issues will cause the filesystem to crash.
2084 * If anyone wants to figure out what part of the code
2085 * refers to osb->journal before ocfs2_journal_init() is run,
2086 * be my guest.
2087 */
2088 /* initialize our journal structure */
2089
cd861280 2090 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 2091 if (!journal) {
2092 mlog(ML_ERROR, "unable to alloc journal\n");
2093 status = -ENOMEM;
2094 goto bail;
2095 }
2096 osb->journal = journal;
2097 journal->j_osb = osb;
2098
2099 atomic_set(&journal->j_num_trans, 0);
2100 init_rwsem(&journal->j_trans_barrier);
2101 init_waitqueue_head(&journal->j_checkpointed);
2102 spin_lock_init(&journal->j_lock);
2103 journal->j_trans_id = (unsigned long) 1;
2104 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 2105 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 2106 journal->j_state = OCFS2_JOURNAL_FREE;
2107
ea455f8a
JK		 2108 INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
2109 osb->dentry_lock_list = NULL;
2110
ccd979bd
MF		 2111 /* get some pseudo constants for clustersize bits */
2112 osb->s_clustersize_bits =
2113 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
2114 osb->s_clustersize = 1 << osb->s_clustersize_bits;
2115 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
2116
2117 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
2118 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
2119 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
2120 osb->s_clustersize);
2121 status = -EINVAL;
2122 goto bail;
2123 }
2124
2125 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
2126 > (u32)~0UL) {
2127 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
2128 "what jbd can address in 32 bits.\n");
2129 status = -EINVAL;
2130 goto bail;
2131 }
2132
2133 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
2134 sizeof(di->id2.i_super.s_uuid))) {
2135 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
2136 status = -ENOMEM;
2137 goto bail;
2138 }
2139
78427043 2140 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
ccd979bd
MF		 2141
2142 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
2143 osb->vol_label[63] = '\0';
2144 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
2145 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
2146 osb->first_cluster_group_blkno =
2147 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
2148 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
cf1d6c76 2149 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
ccd979bd
MF		 2150 mlog(0, "vol_label: %s\n", osb->vol_label);
2151 mlog(0, "uuid: %s\n", osb->uuid_str);
b0697053
MF		 2152 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
2153 (unsigned long long)osb->root_blkno,
2154 (unsigned long long)osb->system_dir_blkno);
ccd979bd
MF		 2155
2156 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
2157 if (!osb->osb_dlm_debug) {
2158 status = -ENOMEM;
2159 mlog_errno(status);
2160 goto bail;
2161 }
2162
2163 atomic_set(&osb->vol_state, VOLUME_INIT);
2164
2165 /* load root, system_dir, and all global system inodes */
2166 status = ocfs2_init_global_system_inodes(osb);
2167 if (status < 0) {
2168 mlog_errno(status);
2169 goto bail;
2170 }
2171
2172 /*
2173 * global bitmap
2174 */
2175 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
2176 OCFS2_INVALID_SLOT);
2177 if (!inode) {
2178 status = -EINVAL;
2179 mlog_errno(status);
2180 goto bail;
2181 }
2182
2183 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
ccd979bd 2184 iput(inode);
ccd979bd 2185
e9d578a8 2186 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
ccd979bd
MF		 2187
2188 status = ocfs2_init_slot_info(osb);
2189 if (status < 0) {
2190 mlog_errno(status);
2191 goto bail;
2192 }
2193
ccd979bd
MF		 2194bail:
2195 mlog_exit(status);
2196 return status;
2197}
2198
2199/*
2200 * will return: -EAGAIN if it is ok to keep searching for superblocks
2201 * -EINVAL if there is a bad superblock
2202 * 0 on success
2203 */
2204static int ocfs2_verify_volume(struct ocfs2_dinode *di,
2205 struct buffer_head *bh,
73be192b
JB		 2206 u32 blksz,
2207 struct ocfs2_blockcheck_stats *stats)
ccd979bd
MF		 2208{
2209 int status = -EAGAIN;
2210
2211 mlog_entry_void();
2212
2213 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
2214 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
d030cc97
JB		 2215 /* We have to do a raw check of the feature here */
2216 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
2217 OCFS2_FEATURE_INCOMPAT_META_ECC) {
2218 status = ocfs2_block_check_validate(bh->b_data,
2219 bh->b_size,
73be192b
JB		 2220 &di->i_check,
2221 stats);
d030cc97
JB		 2222 if (status)
2223 goto out;
2224 }
ccd979bd
MF		 2225 status = -EINVAL;
2226 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2227 mlog(ML_ERROR, "found superblock with incorrect block "
2228 "size: found %u, should be %u\n",
2229 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2230 blksz);
2231 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2232 OCFS2_MAJOR_REV_LEVEL ||
2233 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2234 OCFS2_MINOR_REV_LEVEL) {
2235 mlog(ML_ERROR, "found superblock with bad version: "
2236 "found %u.%u, should be %u.%u\n",
2237 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2238 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2239 OCFS2_MAJOR_REV_LEVEL,
2240 OCFS2_MINOR_REV_LEVEL);
2241 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2242 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 2243 "found %llu, should be %llu\n",
1ca1a111 2244 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 2245 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 2246 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2247 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2248 mlog(ML_ERROR, "bad cluster size found: %u\n",
2249 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2250 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2251 mlog(ML_ERROR, "bad root_blkno: 0\n");
2252 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2253 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2254 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2255 mlog(ML_ERROR,
2256 "Superblock slots found greater than file system "
2257 "maximum: found %u, max %u\n",
2258 le16_to_cpu(di->id2.i_super.s_max_slots),
2259 OCFS2_MAX_SLOTS);
2260 } else {
2261 /* found it! */
2262 status = 0;
2263 }
2264 }
2265
d030cc97 2266out:
ccd979bd
MF		 2267 mlog_exit(status);
2268 return status;
2269}
2270
2271static int ocfs2_check_volume(struct ocfs2_super *osb)
2272{
bddb8eb3 2273 int status;
ccd979bd 2274 int dirty;
c271c5c2 2275 int local;
ccd979bd
MF		 2276 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2277 * recover
2278 * ourselves. */
2279
2280 mlog_entry_void();
2281
2282 /* Init our journal object. */
2283 status = ocfs2_journal_init(osb->journal, &dirty);
2284 if (status < 0) {
2285 mlog(ML_ERROR, "Could not initialize journal!\n");
2286 goto finally;
2287 }
2288
2289 /* If the journal was unmounted cleanly then we don't want to
2290 * recover anything. Otherwise, journal_load will do that
2291 * dirty work for us :) */
2292 if (!dirty) {
2293 status = ocfs2_journal_wipe(osb->journal, 0);
2294 if (status < 0) {
2295 mlog_errno(status);
2296 goto finally;
2297 }
2298 } else {
2299 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2300 "recovering volume.\n");
2301 }
2302
c271c5c2
SM		 2303 local = ocfs2_mount_local(osb);
2304
ccd979bd 2305 /* will play back anything left in the journal. */
539d8264 2306 status = ocfs2_journal_load(osb->journal, local, dirty);
01af4820
WW		 2307 if (status < 0) {
2308 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2309 goto finally;
2310 }
ccd979bd
MF		 2311
2312 if (dirty) {
2313 /* recover my local alloc if we didn't unmount cleanly. */
2314 status = ocfs2_begin_local_alloc_recovery(osb,
2315 osb->slot_num,
2316 &local_alloc);
2317 if (status < 0) {
2318 mlog_errno(status);
2319 goto finally;
2320 }
2321 /* we complete the recovery process after we've marked
2322 * ourselves as mounted. */
2323 }
2324
2325 mlog(0, "Journal loaded.\n");
2326
2327 status = ocfs2_load_local_alloc(osb);
2328 if (status < 0) {
2329 mlog_errno(status);
2330 goto finally;
2331 }
2332
2333 if (dirty) {
2334 /* Recovery will be completed after we've mounted the
2335 * rest of the volume. */
2336 osb->dirty = 1;
2337 osb->local_alloc_copy = local_alloc;
2338 local_alloc = NULL;
2339 }
2340
2341 /* go through each journal, trylock it and if you get the
2342 * lock, and it's marked as dirty, set the bit in the recover
2343 * map and launch a recovery thread for it. */
2344 status = ocfs2_mark_dead_nodes(osb);
9140db04
SE		 2345 if (status < 0) {
2346 mlog_errno(status);
2347 goto finally;
2348 }
2349
2350 status = ocfs2_compute_replay_slots(osb);
ccd979bd
MF		 2351 if (status < 0)
2352 mlog_errno(status);
2353
2354finally:
2355 if (local_alloc)
2356 kfree(local_alloc);
2357
2358 mlog_exit(status);
2359 return status;
2360}
2361
2362/*
2363 * The routine gets called from dismount or close whenever a dismount on
2364 * volume is requested and the osb open count becomes 1.
2365 * It will remove the osb from the global list and also free up all the
2366 * initialized resources and fileobject.
2367 */
2368static void ocfs2_delete_osb(struct ocfs2_super *osb)
2369{
2370 mlog_entry_void();
2371
2372 /* This function assumes that the caller has the main osb resource */
2373
8e8a4603 2374 ocfs2_free_slot_info(osb);
ccd979bd 2375
b4df6ed8 2376 kfree(osb->osb_orphan_wipes);
539d8264 2377 kfree(osb->slot_recovery_generations);
ccd979bd
MF		 2378 /* FIXME
2379 * This belongs in journal shutdown, but because we have to
2380 * allocate osb->journal at the start of ocfs2_initalize_osb(),
2381 * we free it here.
2382 */
2383 kfree(osb->journal);
2384 if (osb->local_alloc_copy)
2385 kfree(osb->local_alloc_copy);
2386 kfree(osb->uuid_str);
2387 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2388 memset(osb, 0, sizeof(struct ocfs2_super));
2389
2390 mlog_exit_void();
2391}
2392
2393/* Put OCFS2 into a readonly state, or (if the user specifies it),
2394 * panic(). We do not support continue-on-error operation. */
2395static void ocfs2_handle_error(struct super_block *sb)
2396{
2397 struct ocfs2_super *osb = OCFS2_SB(sb);
2398
2399 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2400 panic("OCFS2: (device %s): panic forced after error\n",
2401 sb->s_id);
2402
2403 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2404
2405 if (sb->s_flags & MS_RDONLY &&
2406 (ocfs2_is_soft_readonly(osb) ||
2407 ocfs2_is_hard_readonly(osb)))
2408 return;
2409
2410 printk(KERN_CRIT "File system is now read-only due to the potential "
2411 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2412 "system is unmounted.\n");
2413 sb->s_flags |= MS_RDONLY;
2414 ocfs2_set_ro_flag(osb, 0);
2415}
2416
2417static char error_buf[1024];
2418
2419void __ocfs2_error(struct super_block *sb,
2420 const char *function,
2421 const char *fmt, ...)
2422{
2423 va_list args;
2424
2425 va_start(args, fmt);
4a6e617a 2426 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 2427 va_end(args);
2428
2429 /* Not using mlog here because we want to show the actual
2430 * function the error came from. */
2431 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2432 sb->s_id, function, error_buf);
2433
2434 ocfs2_handle_error(sb);
2435}
2436
2437/* Handle critical errors. This is intentionally more drastic than
2438 * ocfs2_handle_error, so we only use for things like journal errors,
2439 * etc. */
2440void __ocfs2_abort(struct super_block* sb,
2441 const char *function,
2442 const char *fmt, ...)
2443{
2444 va_list args;
2445
2446 va_start(args, fmt);
4a6e617a 2447 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 2448 va_end(args);
2449
2450 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2451 sb->s_id, function, error_buf);
2452
2453 /* We don't have the cluster support yet to go straight to
2454 * hard readonly in here. Until then, we want to keep
2455 * ocfs2_abort() so that we can at least mark critical
2456 * errors.
2457 *
2458 * TODO: This should abort the journal and alert other nodes
2459 * that our slot needs recovery. */
2460
2461 /* Force a panic(). This stinks, but it's better than letting
2462 * things continue without having a proper hard readonly
2463 * here. */
2464 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2465 ocfs2_handle_error(sb);
2466}
2467
2468module_init(ocfs2_init);
2469module_exit(ocfs2_exit);
Linux kernel - Deliverables
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