projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ocfs2: Limit inode allocation to 32bits.
[linux-2.6-block.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>
ccd979bd
MF		 44
45#define MLOG_MASK_PREFIX ML_SUPER
46#include <cluster/masklog.h>
47
48#include "ocfs2.h"
49
50/* this should be the only file to include a version 1 header */
51#include "ocfs1_fs_compat.h"
52
53#include "alloc.h"
54#include "dlmglue.h"
55#include "export.h"
56#include "extent_map.h"
57#include "heartbeat.h"
58#include "inode.h"
59#include "journal.h"
60#include "localalloc.h"
61#include "namei.h"
62#include "slot_map.h"
63#include "super.h"
64#include "sysfile.h"
65#include "uptodate.h"
66#include "ver.h"
cf1d6c76 67#include "xattr.h"
ccd979bd
MF		 68
69#include "buffer_head_io.h"
70
e18b890b 71static struct kmem_cache *ocfs2_inode_cachep = NULL;
ccd979bd 72
ccd979bd
MF		 73/* OCFS2 needs to schedule several differnt types of work which
74 * require cluster locking, disk I/O, recovery waits, etc. Since these
75 * types of work tend to be heavy we avoid using the kernel events
76 * workqueue and schedule on our own. */
77struct workqueue_struct *ocfs2_wq = NULL;
78
79static struct dentry *ocfs2_debugfs_root = NULL;
80
81MODULE_AUTHOR("Oracle");
82MODULE_LICENSE("GPL");
83
c0123ade
TY		 84struct mount_options
85{
d147b3d6 86 unsigned long commit_interval;
c0123ade
TY		 87 unsigned long mount_opt;
88 unsigned int atime_quantum;
89 signed short slot;
2fbe8d1e 90 unsigned int localalloc_opt;
b61817e1 91 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c0123ade
TY		 92};
93
ccd979bd 94static int ocfs2_parse_options(struct super_block *sb, char *options,
c0123ade 95 struct mount_options *mopt,
baf4661a 96 int is_remount);
d550071c 97static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
ccd979bd
MF		 98static void ocfs2_put_super(struct super_block *sb);
99static int ocfs2_mount_volume(struct super_block *sb);
100static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
101static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
102static int ocfs2_initialize_mem_caches(void);
103static void ocfs2_free_mem_caches(void);
104static void ocfs2_delete_osb(struct ocfs2_super *osb);
105
726c3342 106static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
ccd979bd
MF		 107
108static int ocfs2_sync_fs(struct super_block *sb, int wait);
109
110static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
111static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
bddb8eb3 112static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
ccd979bd
MF		 113static int ocfs2_check_volume(struct ocfs2_super *osb);
114static int ocfs2_verify_volume(struct ocfs2_dinode *di,
115 struct buffer_head *bh,
116 u32 sectsize);
117static int ocfs2_initialize_super(struct super_block *sb,
118 struct buffer_head *bh,
119 int sector_size);
120static int ocfs2_get_sector(struct super_block *sb,
121 struct buffer_head **bh,
122 int block,
123 int sect_size);
124static void ocfs2_write_super(struct super_block *sb);
125static struct inode *ocfs2_alloc_inode(struct super_block *sb);
126static void ocfs2_destroy_inode(struct inode *inode);
127
ee9b6d61 128static const struct super_operations ocfs2_sops = {
ccd979bd
MF		 129 .statfs = ocfs2_statfs,
130 .alloc_inode = ocfs2_alloc_inode,
131 .destroy_inode = ocfs2_destroy_inode,
132 .drop_inode = ocfs2_drop_inode,
133 .clear_inode = ocfs2_clear_inode,
134 .delete_inode = ocfs2_delete_inode,
135 .sync_fs = ocfs2_sync_fs,
136 .write_super = ocfs2_write_super,
137 .put_super = ocfs2_put_super,
138 .remount_fs = ocfs2_remount,
d550071c 139 .show_options = ocfs2_show_options,
ccd979bd
MF		 140};
141
142enum {
143 Opt_barrier,
144 Opt_err_panic,
145 Opt_err_ro,
146 Opt_intr,
147 Opt_nointr,
148 Opt_hb_none,
149 Opt_hb_local,
150 Opt_data_ordered,
151 Opt_data_writeback,
7f1a37e3 152 Opt_atime_quantum,
baf4661a 153 Opt_slot,
d147b3d6 154 Opt_commit,
2fbe8d1e 155 Opt_localalloc,
53fc622b 156 Opt_localflocks,
b61817e1 157 Opt_stack,
cf1d6c76
TY		 158 Opt_user_xattr,
159 Opt_nouser_xattr,
ccd979bd
MF		 160 Opt_err,
161};
162
a447c093 163static const match_table_t tokens = {
ccd979bd
MF		 164 {Opt_barrier, "barrier=%u"},
165 {Opt_err_panic, "errors=panic"},
166 {Opt_err_ro, "errors=remount-ro"},
167 {Opt_intr, "intr"},
168 {Opt_nointr, "nointr"},
169 {Opt_hb_none, OCFS2_HB_NONE},
170 {Opt_hb_local, OCFS2_HB_LOCAL},
171 {Opt_data_ordered, "data=ordered"},
172 {Opt_data_writeback, "data=writeback"},
7f1a37e3 173 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 174 {Opt_slot, "preferred_slot=%u"},
d147b3d6 175 {Opt_commit, "commit=%u"},
2fbe8d1e 176 {Opt_localalloc, "localalloc=%d"},
53fc622b 177 {Opt_localflocks, "localflocks"},
b61817e1 178 {Opt_stack, "cluster_stack=%s"},
cf1d6c76
TY		 179 {Opt_user_xattr, "user_xattr"},
180 {Opt_nouser_xattr, "nouser_xattr"},
ccd979bd
MF		 181 {Opt_err, NULL}
182};
183
184/*
185 * write_super and sync_fs ripped right out of ext3.
186 */
187static void ocfs2_write_super(struct super_block *sb)
188{
7892f2f4 189 if (mutex_trylock(&sb->s_lock) != 0)
ccd979bd
MF		 190 BUG();
191 sb->s_dirt = 0;
192}
193
194static int ocfs2_sync_fs(struct super_block *sb, int wait)
195{
bddb8eb3 196 int status;
ccd979bd
MF		 197 tid_t target;
198 struct ocfs2_super *osb = OCFS2_SB(sb);
199
200 sb->s_dirt = 0;
201
202 if (ocfs2_is_hard_readonly(osb))
203 return -EROFS;
204
205 if (wait) {
206 status = ocfs2_flush_truncate_log(osb);
207 if (status < 0)
208 mlog_errno(status);
209 } else {
210 ocfs2_schedule_truncate_log_flush(osb, 0);
211 }
212
213 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
214 if (wait)
215 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
216 target);
217 }
218 return 0;
219}
220
221static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
222{
223 struct inode *new = NULL;
224 int status = 0;
225 int i;
226
227 mlog_entry_void();
228
5fa0613e 229 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 230 if (IS_ERR(new)) {
231 status = PTR_ERR(new);
232 mlog_errno(status);
233 goto bail;
234 }
235 osb->root_inode = new;
236
5fa0613e 237 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 238 if (IS_ERR(new)) {
239 status = PTR_ERR(new);
240 mlog_errno(status);
241 goto bail;
242 }
243 osb->sys_root_inode = new;
244
245 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
246 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
247 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
248 if (!new) {
249 ocfs2_release_system_inodes(osb);
250 status = -EINVAL;
251 mlog_errno(status);
252 /* FIXME: Should ERROR_RO_FS */
253 mlog(ML_ERROR, "Unable to load system inode %d, "
254 "possibly corrupt fs?", i);
255 goto bail;
256 }
257 // the array now has one ref, so drop this one
258 iput(new);
259 }
260
261bail:
262 mlog_exit(status);
263 return status;
264}
265
266static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
267{
268 struct inode *new = NULL;
269 int status = 0;
270 int i;
271
272 mlog_entry_void();
273
274 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
275 i < NUM_SYSTEM_INODES;
276 i++) {
277 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
278 if (!new) {
279 ocfs2_release_system_inodes(osb);
280 status = -EINVAL;
281 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
282 status, i, osb->slot_num);
283 goto bail;
284 }
285 /* the array now has one ref, so drop this one */
286 iput(new);
287 }
288
289bail:
290 mlog_exit(status);
291 return status;
292}
293
bddb8eb3 294static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
ccd979bd 295{
bddb8eb3 296 int i;
ccd979bd
MF		 297 struct inode *inode;
298
299 mlog_entry_void();
300
301 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
302 inode = osb->system_inodes[i];
303 if (inode) {
304 iput(inode);
305 osb->system_inodes[i] = NULL;
306 }
307 }
308
309 inode = osb->sys_root_inode;
310 if (inode) {
311 iput(inode);
312 osb->sys_root_inode = NULL;
313 }
314
315 inode = osb->root_inode;
316 if (inode) {
317 iput(inode);
318 osb->root_inode = NULL;
319 }
320
bddb8eb3 321 mlog_exit(0);
ccd979bd
MF		 322}
323
324/* We're allocating fs objects, use GFP_NOFS */
325static struct inode *ocfs2_alloc_inode(struct super_block *sb)
326{
327 struct ocfs2_inode_info *oi;
328
e6b4f8da 329 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 330 if (!oi)
331 return NULL;
332
333 return &oi->vfs_inode;
334}
335
336static void ocfs2_destroy_inode(struct inode *inode)
337{
338 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
339}
340
5a254031
MF		 341static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
342 unsigned int cbits)
ccd979bd 343{
5a254031
MF		 344 unsigned int bytes = 1 << cbits;
345 unsigned int trim = bytes;
346 unsigned int bitshift = 32;
347
348 /*
349 * i_size and all block offsets in ocfs2 are always 64 bits
350 * wide. i_clusters is 32 bits, in cluster-sized units. So on
351 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 352 */
353
354#if BITS_PER_LONG == 32
355# if defined(CONFIG_LBD)
2ecd05ae 356 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 357 /*
358 * We might be limited by page cache size.
359 */
360 if (bytes > PAGE_CACHE_SIZE) {
361 bytes = PAGE_CACHE_SIZE;
362 trim = 1;
363 /*
364 * Shift by 31 here so that we don't get larger than
365 * MAX_LFS_FILESIZE
366 */
367 bitshift = 31;
368 }
ccd979bd 369# else
5a254031
MF		 370 /*
371 * We are limited by the size of sector_t. Use block size, as
372 * that's what we expose to the VFS.
373 */
374 bytes = 1 << bbits;
375 trim = 1;
376 bitshift = 31;
ccd979bd
MF		 377# endif
378#endif
379
5a254031
MF		 380 /*
381 * Trim by a whole cluster when we can actually approach the
382 * on-disk limits. Otherwise we can overflow i_clusters when
383 * an extent start is at the max offset.
384 */
385 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 386}
387
388static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
389{
390 int incompat_features;
391 int ret = 0;
c0123ade 392 struct mount_options parsed_options;
ccd979bd
MF		 393 struct ocfs2_super *osb = OCFS2_SB(sb);
394
c0123ade 395 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
ccd979bd
MF		 396 ret = -EINVAL;
397 goto out;
398 }
399
400 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
c0123ade 401 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
ccd979bd
MF		 402 ret = -EINVAL;
403 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
404 goto out;
405 }
406
407 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 408 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 409 ret = -EINVAL;
410 mlog(ML_ERROR, "Cannot change data mode on remount\n");
411 goto out;
412 }
413
414 /* We're going to/from readonly mode. */
415 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
416 /* Lock here so the check of HARD_RO and the potential
417 * setting of SOFT_RO is atomic. */
418 spin_lock(&osb->osb_lock);
419 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
420 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
421 ret = -EROFS;
422 goto unlock_osb;
423 }
424
425 if (*flags & MS_RDONLY) {
426 mlog(0, "Going to ro mode.\n");
427 sb->s_flags |= MS_RDONLY;
428 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
429 } else {
430 mlog(0, "Making ro filesystem writeable.\n");
431
432 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
433 mlog(ML_ERROR, "Cannot remount RDWR "
434 "filesystem due to previous errors.\n");
435 ret = -EROFS;
436 goto unlock_osb;
437 }
438 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
439 if (incompat_features) {
440 mlog(ML_ERROR, "Cannot remount RDWR because "
441 "of unsupported optional features "
442 "(%x).\n", incompat_features);
443 ret = -EINVAL;
444 goto unlock_osb;
445 }
446 sb->s_flags &= ~MS_RDONLY;
447 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
448 }
449unlock_osb:
450 spin_unlock(&osb->osb_lock);
451 }
452
453 if (!ret) {
ccd979bd
MF		 454 /* Only save off the new mount options in case of a successful
455 * remount. */
c0123ade
TY		 456 osb->s_mount_opt = parsed_options.mount_opt;
457 osb->s_atime_quantum = parsed_options.atime_quantum;
458 osb->preferred_slot = parsed_options.slot;
d147b3d6
MF		 459 if (parsed_options.commit_interval)
460 osb->osb_commit_interval = parsed_options.commit_interval;
e001e796
MF		 461
462 if (!ocfs2_is_hard_readonly(osb))
463 ocfs2_set_journal_params(osb);
ccd979bd
MF		 464 }
465out:
466 return ret;
467}
468
469static int ocfs2_sb_probe(struct super_block *sb,
470 struct buffer_head **bh,
471 int *sector_size)
472{
bddb8eb3 473 int status, tmpstat;
ccd979bd
MF		 474 struct ocfs1_vol_disk_hdr *hdr;
475 struct ocfs2_dinode *di;
476 int blksize;
477
478 *bh = NULL;
479
480 /* may be > 512 */
481 *sector_size = bdev_hardsect_size(sb->s_bdev);
482 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
483 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
484 *sector_size, OCFS2_MAX_BLOCKSIZE);
485 status = -EINVAL;
486 goto bail;
487 }
488
489 /* Can this really happen? */
490 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
491 *sector_size = OCFS2_MIN_BLOCKSIZE;
492
493 /* check block zero for old format */
494 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
495 if (status < 0) {
496 mlog_errno(status);
497 goto bail;
498 }
499 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
500 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
501 mlog(ML_ERROR, "incompatible version: %u.%u\n",
502 hdr->major_version, hdr->minor_version);
503 status = -EINVAL;
504 }
505 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
506 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
507 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
508 hdr->signature);
509 status = -EINVAL;
510 }
511 brelse(*bh);
512 *bh = NULL;
513 if (status < 0) {
514 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
515 "upgraded before mounting with ocfs v2\n");
516 goto bail;
517 }
518
519 /*
520 * Now check at magic offset for 512, 1024, 2048, 4096
521 * blocksizes. 4096 is the maximum blocksize because it is
522 * the minimum clustersize.
523 */
524 status = -EINVAL;
525 for (blksize = *sector_size;
526 blksize <= OCFS2_MAX_BLOCKSIZE;
527 blksize <<= 1) {
528 tmpstat = ocfs2_get_sector(sb, bh,
529 OCFS2_SUPER_BLOCK_BLKNO,
530 blksize);
531 if (tmpstat < 0) {
532 status = tmpstat;
533 mlog_errno(status);
534 goto bail;
535 }
536 di = (struct ocfs2_dinode *) (*bh)->b_data;
537 status = ocfs2_verify_volume(di, *bh, blksize);
538 if (status >= 0)
539 goto bail;
540 brelse(*bh);
541 *bh = NULL;
542 if (status != -EAGAIN)
543 break;
544 }
545
546bail:
547 return status;
548}
549
c271c5c2
SM		 550static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
551{
552 if (ocfs2_mount_local(osb)) {
553 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
554 mlog(ML_ERROR, "Cannot heartbeat on a locally "
555 "mounted device.\n");
556 return -EINVAL;
557 }
558 }
559
b61817e1
JB		 560 if (ocfs2_userspace_stack(osb)) {
561 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
562 mlog(ML_ERROR, "Userspace stack expected, but "
563 "o2cb heartbeat arguments passed to mount\n");
564 return -EINVAL;
565 }
566 }
567
c271c5c2 568 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
b61817e1
JB		 569 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
570 !ocfs2_userspace_stack(osb)) {
c271c5c2
SM		 571 mlog(ML_ERROR, "Heartbeat has to be started to mount "
572 "a read-write clustered device.\n");
573 return -EINVAL;
574 }
575 }
576
577 return 0;
578}
579
b61817e1
JB		 580/*
581 * If we're using a userspace stack, mount should have passed
582 * a name that matches the disk. If not, mount should not
583 * have passed a stack.
584 */
585static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
586 struct mount_options *mopt)
587{
588 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
589 mlog(ML_ERROR,
590 "cluster stack passed to mount, but this filesystem "
591 "does not support it\n");
592 return -EINVAL;
593 }
594
595 if (ocfs2_userspace_stack(osb) &&
596 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
597 OCFS2_STACK_LABEL_LEN)) {
598 mlog(ML_ERROR,
599 "cluster stack passed to mount (\"%s\") does not "
600 "match the filesystem (\"%s\")\n",
601 mopt->cluster_stack,
602 osb->osb_cluster_stack);
603 return -EINVAL;
604 }
605
606 return 0;
607}
608
ccd979bd
MF		 609static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
610{
611 struct dentry *root;
612 int status, sector_size;
c0123ade 613 struct mount_options parsed_options;
ccd979bd
MF		 614 struct inode *inode = NULL;
615 struct ocfs2_super *osb = NULL;
616 struct buffer_head *bh = NULL;
c271c5c2 617 char nodestr[8];
ccd979bd
MF		 618
619 mlog_entry("%p, %p, %i", sb, data, silent);
620
c0123ade 621 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 622 status = -EINVAL;
623 goto read_super_error;
624 }
625
626 /* probe for superblock */
627 status = ocfs2_sb_probe(sb, &bh, &sector_size);
628 if (status < 0) {
629 mlog(ML_ERROR, "superblock probe failed!\n");
630 goto read_super_error;
631 }
632
633 status = ocfs2_initialize_super(sb, bh, sector_size);
634 osb = OCFS2_SB(sb);
635 if (status < 0) {
636 mlog_errno(status);
637 goto read_super_error;
638 }
639 brelse(bh);
640 bh = NULL;
c0123ade
TY		 641 osb->s_mount_opt = parsed_options.mount_opt;
642 osb->s_atime_quantum = parsed_options.atime_quantum;
643 osb->preferred_slot = parsed_options.slot;
d147b3d6 644 osb->osb_commit_interval = parsed_options.commit_interval;
9c7af40b
MF		 645 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
646 osb->local_alloc_bits = osb->local_alloc_default_bits;
ccd979bd 647
b61817e1
JB		 648 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
649 if (status)
650 goto read_super_error;
651
ccd979bd
MF		 652 sb->s_magic = OCFS2_SUPER_MAGIC;
653
654 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
655 * heartbeat=none */
656 if (bdev_read_only(sb->s_bdev)) {
657 if (!(sb->s_flags & MS_RDONLY)) {
658 status = -EACCES;
659 mlog(ML_ERROR, "Readonly device detected but readonly "
660 "mount was not specified.\n");
661 goto read_super_error;
662 }
663
664 /* You should not be able to start a local heartbeat
665 * on a readonly device. */
666 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
667 status = -EROFS;
668 mlog(ML_ERROR, "Local heartbeat specified on readonly "
669 "device.\n");
670 goto read_super_error;
671 }
672
673 status = ocfs2_check_journals_nolocks(osb);
674 if (status < 0) {
675 if (status == -EROFS)
676 mlog(ML_ERROR, "Recovery required on readonly "
677 "file system, but write access is "
678 "unavailable.\n");
679 else
680 mlog_errno(status);
681 goto read_super_error;
682 }
683
684 ocfs2_set_ro_flag(osb, 1);
685
686 printk(KERN_NOTICE "Readonly device detected. No cluster "
687 "services will be utilized for this mount. Recovery "
688 "will be skipped.\n");
689 }
690
691 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 692 if (sb->s_flags & MS_RDONLY)
693 ocfs2_set_ro_flag(osb, 0);
694 }
695
c271c5c2
SM		 696 status = ocfs2_verify_heartbeat(osb);
697 if (status < 0) {
698 mlog_errno(status);
699 goto read_super_error;
700 }
701
ccd979bd
MF		 702 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
703 ocfs2_debugfs_root);
704 if (!osb->osb_debug_root) {
705 status = -EINVAL;
706 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
707 goto read_super_error;
708 }
709
710 status = ocfs2_mount_volume(sb);
711 if (osb->root_inode)
712 inode = igrab(osb->root_inode);
713
714 if (status < 0)
715 goto read_super_error;
716
717 if (!inode) {
718 status = -EIO;
719 mlog_errno(status);
720 goto read_super_error;
721 }
722
723 root = d_alloc_root(inode);
724 if (!root) {
725 status = -ENOMEM;
726 mlog_errno(status);
727 goto read_super_error;
728 }
729
730 sb->s_root = root;
731
732 ocfs2_complete_mount_recovery(osb);
733
c271c5c2
SM		 734 if (ocfs2_mount_local(osb))
735 snprintf(nodestr, sizeof(nodestr), "local");
736 else
19fdb624 737 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 738
739 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 740 "with %s data mode.\n",
c271c5c2 741 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 742 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
743 "ordered");
744
745 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
746 wake_up(&osb->osb_mount_event);
747
748 mlog_exit(status);
749 return status;
750
751read_super_error:
752 if (bh != NULL)
753 brelse(bh);
754
755 if (inode)
756 iput(inode);
757
758 if (osb) {
759 atomic_set(&osb->vol_state, VOLUME_DISABLED);
760 wake_up(&osb->osb_mount_event);
761 ocfs2_dismount_volume(sb, 1);
762 }
763
764 mlog_exit(status);
765 return status;
766}
767
454e2398
DH		 768static int ocfs2_get_sb(struct file_system_type *fs_type,
769 int flags,
770 const char *dev_name,
771 void *data,
772 struct vfsmount *mnt)
ccd979bd 773{
454e2398
DH		 774 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
775 mnt);
ccd979bd
MF		 776}
777
778static struct file_system_type ocfs2_fs_type = {
779 .owner = THIS_MODULE,
780 .name = "ocfs2",
781 .get_sb = ocfs2_get_sb, /* is this called when we mount
782 * the fs? */
783 .kill_sb = kill_block_super, /* set to the generic one
784 * right now, but do we
785 * need to change that? */
1ba9da2f 786 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 787 .next = NULL
788};
789
790static int ocfs2_parse_options(struct super_block *sb,
791 char *options,
c0123ade 792 struct mount_options *mopt,
ccd979bd
MF		 793 int is_remount)
794{
795 int status;
796 char *p;
797
798 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
799 options ? options : "(none)");
800
d147b3d6 801 mopt->commit_interval = 0;
c0123ade
TY		 802 mopt->mount_opt = 0;
803 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
804 mopt->slot = OCFS2_INVALID_SLOT;
2fbe8d1e 805 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
b61817e1 806 mopt->cluster_stack[0] = '\0';
ccd979bd
MF		 807
808 if (!options) {
809 status = 1;
810 goto bail;
811 }
812
813 while ((p = strsep(&options, ",")) != NULL) {
814 int token, option;
815 substring_t args[MAX_OPT_ARGS];
816
817 if (!*p)
818 continue;
819
820 token = match_token(p, tokens, args);
821 switch (token) {
822 case Opt_hb_local:
c0123ade 823 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 824 break;
825 case Opt_hb_none:
c0123ade 826 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 827 break;
828 case Opt_barrier:
829 if (match_int(&args[0], &option)) {
830 status = 0;
831 goto bail;
832 }
833 if (option)
c0123ade 834 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 835 else
c0123ade 836 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 837 break;
838 case Opt_intr:
c0123ade 839 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 840 break;
841 case Opt_nointr:
c0123ade 842 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 843 break;
844 case Opt_err_panic:
c0123ade 845 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 846 break;
847 case Opt_err_ro:
c0123ade 848 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 849 break;
850 case Opt_data_ordered:
c0123ade 851 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 852 break;
853 case Opt_data_writeback:
c0123ade 854 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 855 break;
cf1d6c76
TY		 856 case Opt_user_xattr:
857 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
858 break;
859 case Opt_nouser_xattr:
860 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
861 break;
7f1a37e3
TY		 862 case Opt_atime_quantum:
863 if (match_int(&args[0], &option)) {
864 status = 0;
865 goto bail;
866 }
867 if (option >= 0)
c0123ade 868 mopt->atime_quantum = option;
7f1a37e3 869 break;
baf4661a
SM		 870 case Opt_slot:
871 option = 0;
872 if (match_int(&args[0], &option)) {
873 status = 0;
874 goto bail;
875 }
876 if (option)
c0123ade 877 mopt->slot = (s16)option;
baf4661a 878 break;
d147b3d6
MF		 879 case Opt_commit:
880 option = 0;
881 if (match_int(&args[0], &option)) {
882 status = 0;
883 goto bail;
884 }
885 if (option < 0)
886 return 0;
887 if (option == 0)
888 option = JBD_DEFAULT_MAX_COMMIT_AGE;
889 mopt->commit_interval = HZ * option;
890 break;
2fbe8d1e
SM		 891 case Opt_localalloc:
892 option = 0;
893 if (match_int(&args[0], &option)) {
894 status = 0;
895 goto bail;
896 }
897 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
898 mopt->localalloc_opt = option;
899 break;
53fc622b
MF		 900 case Opt_localflocks:
901 /*
902 * Changing this during remount could race
903 * flock() requests, or "unbalance" existing
904 * ones (e.g., a lock is taken in one mode but
905 * dropped in the other). If users care enough
906 * to flip locking modes during remount, we
907 * could add a "local" flag to individual
908 * flock structures for proper tracking of
909 * state.
910 */
911 if (!is_remount)
912 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
913 break;
b61817e1
JB		 914 case Opt_stack:
915 /* Check both that the option we were passed
916 * is of the right length and that it is a proper
917 * string of the right length.
918 */
919 if (((args[0].to - args[0].from) !=
920 OCFS2_STACK_LABEL_LEN) ||
921 (strnlen(args[0].from,
922 OCFS2_STACK_LABEL_LEN) !=
923 OCFS2_STACK_LABEL_LEN)) {
924 mlog(ML_ERROR,
925 "Invalid cluster_stack option\n");
926 status = 0;
927 goto bail;
928 }
929 memcpy(mopt->cluster_stack, args[0].from,
930 OCFS2_STACK_LABEL_LEN);
931 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
932 break;
ccd979bd
MF		 933 default:
934 mlog(ML_ERROR,
935 "Unrecognized mount option \"%s\" "
936 "or missing value\n", p);
937 status = 0;
938 goto bail;
939 }
940 }
941
942 status = 1;
943
944bail:
945 mlog_exit(status);
946 return status;
947}
948
d550071c
SM		 949static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
950{
951 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
952 unsigned long opts = osb->s_mount_opt;
ebcee4b5 953 unsigned int local_alloc_megs;
d550071c
SM		 954
955 if (opts & OCFS2_MOUNT_HB_LOCAL)
956 seq_printf(s, ",_netdev,heartbeat=local");
957 else
958 seq_printf(s, ",heartbeat=none");
959
960 if (opts & OCFS2_MOUNT_NOINTR)
961 seq_printf(s, ",nointr");
962
963 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
964 seq_printf(s, ",data=writeback");
965 else
966 seq_printf(s, ",data=ordered");
967
968 if (opts & OCFS2_MOUNT_BARRIER)
969 seq_printf(s, ",barrier=1");
970
971 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
972 seq_printf(s, ",errors=panic");
973 else
974 seq_printf(s, ",errors=remount-ro");
975
976 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
977 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
978
979 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
980 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
981
d147b3d6
MF		 982 if (osb->osb_commit_interval)
983 seq_printf(s, ",commit=%u",
984 (unsigned) (osb->osb_commit_interval / HZ));
985
ebcee4b5
MF		 986 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
987 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
988 seq_printf(s, ",localalloc=%d", local_alloc_megs);
2fbe8d1e 989
53fc622b
MF		 990 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
991 seq_printf(s, ",localflocks,");
992
b61817e1
JB		 993 if (osb->osb_cluster_stack[0])
994 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
995 osb->osb_cluster_stack);
996
d550071c
SM		 997 return 0;
998}
999
ccd979bd
MF		 1000static int __init ocfs2_init(void)
1001{
1002 int status;
1003
1004 mlog_entry_void();
1005
1006 ocfs2_print_version();
1007
ccd979bd
MF		 1008 status = init_ocfs2_uptodate_cache();
1009 if (status < 0) {
1010 mlog_errno(status);
1011 goto leave;
1012 }
1013
1014 status = ocfs2_initialize_mem_caches();
1015 if (status < 0) {
1016 mlog_errno(status);
1017 goto leave;
1018 }
1019
1020 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1021 if (!ocfs2_wq) {
1022 status = -ENOMEM;
1023 goto leave;
1024 }
1025
ccd979bd
MF		 1026 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1027 if (!ocfs2_debugfs_root) {
1028 status = -EFAULT;
1029 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1030 }
1031
63e0c48a
JB		 1032 ocfs2_set_locking_protocol();
1033
ccd979bd
MF		 1034leave:
1035 if (status < 0) {
1036 ocfs2_free_mem_caches();
1037 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 1038 }
1039
1040 mlog_exit(status);
1041
1042 if (status >= 0) {
1043 return register_filesystem(&ocfs2_fs_type);
1044 } else
1045 return -1;
1046}
1047
1048static void __exit ocfs2_exit(void)
1049{
1050 mlog_entry_void();
1051
1052 if (ocfs2_wq) {
1053 flush_workqueue(ocfs2_wq);
1054 destroy_workqueue(ocfs2_wq);
1055 }
1056
1057 debugfs_remove(ocfs2_debugfs_root);
1058
1059 ocfs2_free_mem_caches();
1060
1061 unregister_filesystem(&ocfs2_fs_type);
1062
ccd979bd
MF		 1063 exit_ocfs2_uptodate_cache();
1064
1065 mlog_exit_void();
1066}
1067
1068static void ocfs2_put_super(struct super_block *sb)
1069{
1070 mlog_entry("(0x%p)\n", sb);
1071
1072 ocfs2_sync_blockdev(sb);
1073 ocfs2_dismount_volume(sb, 0);
1074
1075 mlog_exit_void();
1076}
1077
726c3342 1078static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 1079{
1080 struct ocfs2_super *osb;
1081 u32 numbits, freebits;
1082 int status;
1083 struct ocfs2_dinode *bm_lock;
1084 struct buffer_head *bh = NULL;
1085 struct inode *inode = NULL;
1086
726c3342 1087 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
ccd979bd 1088
726c3342 1089 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 1090
1091 inode = ocfs2_get_system_file_inode(osb,
1092 GLOBAL_BITMAP_SYSTEM_INODE,
1093 OCFS2_INVALID_SLOT);
1094 if (!inode) {
1095 mlog(ML_ERROR, "failed to get bitmap inode\n");
1096 status = -EIO;
1097 goto bail;
1098 }
1099
e63aecb6 1100 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1101 if (status < 0) {
1102 mlog_errno(status);
1103 goto bail;
1104 }
1105
1106 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1107
1108 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1109 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1110
1111 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1112 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1113 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1114 buf->f_blocks = ((sector_t) numbits) *
1115 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1116 buf->f_bfree = ((sector_t) freebits) *
1117 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1118 buf->f_bavail = buf->f_bfree;
1119 buf->f_files = numbits;
1120 buf->f_ffree = freebits;
1121
1122 brelse(bh);
1123
e63aecb6 1124 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1125 status = 0;
1126bail:
1127 if (inode)
1128 iput(inode);
1129
1130 mlog_exit(status);
1131
1132 return status;
1133}
1134
51cc5068 1135static void ocfs2_inode_init_once(void *data)
ccd979bd
MF		 1136{
1137 struct ocfs2_inode_info *oi = data;
1138
a35afb83
CL		 1139 oi->ip_flags = 0;
1140 oi->ip_open_count = 0;
1141 spin_lock_init(&oi->ip_lock);
1142 ocfs2_extent_map_init(&oi->vfs_inode);
1143 INIT_LIST_HEAD(&oi->ip_io_markers);
1144 oi->ip_created_trans = 0;
1145 oi->ip_last_trans = 0;
1146 oi->ip_dir_start_lookup = 0;
ccd979bd 1147
a35afb83 1148 init_rwsem(&oi->ip_alloc_sem);
cf1d6c76 1149 init_rwsem(&oi->ip_xattr_sem);
a35afb83 1150 mutex_init(&oi->ip_io_mutex);
ccd979bd 1151
a35afb83
CL		 1152 oi->ip_blkno = 0ULL;
1153 oi->ip_clusters = 0;
ccd979bd 1154
a35afb83 1155 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1156 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1157 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1158
a35afb83 1159 ocfs2_metadata_cache_init(&oi->vfs_inode);
ccd979bd 1160
a35afb83 1161 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1162}
1163
1164static int ocfs2_initialize_mem_caches(void)
1165{
1166 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1167 sizeof(struct ocfs2_inode_info),
1168 0,
1169 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1170 SLAB_MEM_SPREAD),
20c2df83 1171 ocfs2_inode_init_once);
ccd979bd
MF		 1172 if (!ocfs2_inode_cachep)
1173 return -ENOMEM;
1174
ccd979bd
MF		 1175 return 0;
1176}
1177
1178static void ocfs2_free_mem_caches(void)
1179{
1180 if (ocfs2_inode_cachep)
1181 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd
MF		 1182
1183 ocfs2_inode_cachep = NULL;
ccd979bd
MF		 1184}
1185
1186static int ocfs2_get_sector(struct super_block *sb,
1187 struct buffer_head **bh,
1188 int block,
1189 int sect_size)
1190{
1191 if (!sb_set_blocksize(sb, sect_size)) {
1192 mlog(ML_ERROR, "unable to set blocksize\n");
1193 return -EIO;
1194 }
1195
1196 *bh = sb_getblk(sb, block);
1197 if (!*bh) {
1198 mlog_errno(-EIO);
1199 return -EIO;
1200 }
1201 lock_buffer(*bh);
1202 if (!buffer_dirty(*bh))
1203 clear_buffer_uptodate(*bh);
1204 unlock_buffer(*bh);
1205 ll_rw_block(READ, 1, bh);
1206 wait_on_buffer(*bh);
1207 return 0;
1208}
1209
ccd979bd
MF		 1210static int ocfs2_mount_volume(struct super_block *sb)
1211{
1212 int status = 0;
1213 int unlock_super = 0;
1214 struct ocfs2_super *osb = OCFS2_SB(sb);
1215
1216 mlog_entry_void();
1217
1218 if (ocfs2_is_hard_readonly(osb))
1219 goto leave;
1220
ccd979bd
MF		 1221 status = ocfs2_dlm_init(osb);
1222 if (status < 0) {
1223 mlog_errno(status);
1224 goto leave;
1225 }
1226
ccd979bd
MF		 1227 status = ocfs2_super_lock(osb, 1);
1228 if (status < 0) {
1229 mlog_errno(status);
1230 goto leave;
1231 }
1232 unlock_super = 1;
1233
1234 /* This will load up the node map and add ourselves to it. */
1235 status = ocfs2_find_slot(osb);
1236 if (status < 0) {
1237 mlog_errno(status);
1238 goto leave;
1239 }
1240
ccd979bd
MF		 1241 /* load all node-local system inodes */
1242 status = ocfs2_init_local_system_inodes(osb);
1243 if (status < 0) {
1244 mlog_errno(status);
1245 goto leave;
1246 }
1247
1248 status = ocfs2_check_volume(osb);
1249 if (status < 0) {
1250 mlog_errno(status);
1251 goto leave;
1252 }
1253
1254 status = ocfs2_truncate_log_init(osb);
1255 if (status < 0) {
1256 mlog_errno(status);
1257 goto leave;
1258 }
1259
c271c5c2
SM		 1260 if (ocfs2_mount_local(osb))
1261 goto leave;
1262
ccd979bd
MF		 1263leave:
1264 if (unlock_super)
1265 ocfs2_super_unlock(osb, 1);
1266
1267 mlog_exit(status);
1268 return status;
1269}
1270
ccd979bd
MF		 1271static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1272{
286eaa95 1273 int tmp, hangup_needed = 0;
ccd979bd 1274 struct ocfs2_super *osb = NULL;
c271c5c2 1275 char nodestr[8];
ccd979bd
MF		 1276
1277 mlog_entry("(0x%p)\n", sb);
1278
1279 BUG_ON(!sb);
1280 osb = OCFS2_SB(sb);
1281 BUG_ON(!osb);
1282
1283 ocfs2_shutdown_local_alloc(osb);
1284
1285 ocfs2_truncate_log_shutdown(osb);
1286
553abd04
JB		 1287 /* This will disable recovery and flush any recovery work. */
1288 ocfs2_recovery_exit(osb);
ccd979bd
MF		 1289
1290 ocfs2_journal_shutdown(osb);
1291
1292 ocfs2_sync_blockdev(sb);
1293
4670c46d
JB		 1294 /* No cluster connection means we've failed during mount, so skip
1295 * all the steps which depended on that to complete. */
1296 if (osb->cconn) {
ccd979bd
MF		 1297 tmp = ocfs2_super_lock(osb, 1);
1298 if (tmp < 0) {
1299 mlog_errno(tmp);
1300 return;
1301 }
19b613d4 1302 }
ccd979bd 1303
19b613d4
MF		 1304 if (osb->slot_num != OCFS2_INVALID_SLOT)
1305 ocfs2_put_slot(osb);
ccd979bd 1306
4670c46d 1307 if (osb->cconn)
ccd979bd 1308 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1309
1310 ocfs2_release_system_inodes(osb);
1311
6953b4c0 1312 /*
6953b4c0
JB		 1313 * If we're dismounting due to mount error, mount.ocfs2 will clean
1314 * up heartbeat. If we're a local mount, there is no heartbeat.
1315 * If we failed before we got a uuid_str yet, we can't stop
1316 * heartbeat. Otherwise, do it.
1317 */
1318 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
286eaa95
JB		 1319 hangup_needed = 1;
1320
1321 if (osb->cconn)
1322 ocfs2_dlm_shutdown(osb, hangup_needed);
1323
1324 debugfs_remove(osb->osb_debug_root);
1325
1326 if (hangup_needed)
6953b4c0 1327 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
ccd979bd
MF		 1328
1329 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1330
c271c5c2
SM		 1331 if (ocfs2_mount_local(osb))
1332 snprintf(nodestr, sizeof(nodestr), "local");
1333 else
19fdb624 1334 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1335
1336 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1337 osb->dev_str, nodestr);
ccd979bd
MF		 1338
1339 ocfs2_delete_osb(osb);
1340 kfree(osb);
1341 sb->s_dev = 0;
1342 sb->s_fs_info = NULL;
1343}
1344
1345static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1346 unsigned uuid_bytes)
1347{
1348 int i, ret;
1349 char *ptr;
1350
1351 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1352
cd861280 1353 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 1354 if (osb->uuid_str == NULL)
1355 return -ENOMEM;
1356
ccd979bd
MF		 1357 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1358 /* print with null */
1359 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1360 if (ret != 2) /* drop super cleans up */
1361 return -EINVAL;
1362 /* then only advance past the last char */
1363 ptr += 2;
1364 }
1365
1366 return 0;
1367}
1368
1369static int ocfs2_initialize_super(struct super_block *sb,
1370 struct buffer_head *bh,
1371 int sector_size)
1372{
bddb8eb3 1373 int status;
5a254031
MF		 1374 int i, cbits, bbits;
1375 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 1376 struct inode *inode = NULL;
ccd979bd
MF		 1377 struct ocfs2_journal *journal;
1378 __le32 uuid_net_key;
1379 struct ocfs2_super *osb;
1380
1381 mlog_entry_void();
1382
cd861280 1383 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 1384 if (!osb) {
1385 status = -ENOMEM;
1386 mlog_errno(status);
1387 goto bail;
1388 }
1389
1390 sb->s_fs_info = osb;
1391 sb->s_op = &ocfs2_sops;
1392 sb->s_export_op = &ocfs2_export_ops;
cf1d6c76 1393 sb->s_xattr = ocfs2_xattr_handlers;
e0dceaf0 1394 sb->s_time_gran = 1;
ccd979bd
MF		 1395 sb->s_flags |= MS_NOATIME;
1396 /* this is needed to support O_LARGEFILE */
5a254031
MF		 1397 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1398 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1399 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
ccd979bd
MF		 1400
1401 osb->sb = sb;
1402 /* Save off for ocfs2_rw_direct */
1403 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 1404 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 1405
34d024f8
MF		 1406 spin_lock_init(&osb->dc_task_lock);
1407 init_waitqueue_head(&osb->dc_event);
1408 osb->dc_work_sequence = 0;
1409 osb->dc_wake_sequence = 0;
ccd979bd
MF		 1410 INIT_LIST_HEAD(&osb->blocked_lock_list);
1411 osb->blocked_lock_count = 0;
ccd979bd 1412 spin_lock_init(&osb->osb_lock);
4d0ddb2c 1413 ocfs2_init_inode_steal_slot(osb);
ccd979bd
MF		 1414
1415 atomic_set(&osb->alloc_stats.moves, 0);
1416 atomic_set(&osb->alloc_stats.local_data, 0);
1417 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1418 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1419 atomic_set(&osb->alloc_stats.bg_extends, 0);
1420
1421 ocfs2_init_node_maps(osb);
1422
1423 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1424 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1425
553abd04
JB		 1426 status = ocfs2_recovery_init(osb);
1427 if (status) {
1428 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1429 mlog_errno(status);
1430 goto bail;
1431 }
ccd979bd
MF		 1432
1433 init_waitqueue_head(&osb->checkpoint_event);
1434 atomic_set(&osb->needs_checkpoint, 0);
1435
7f1a37e3
TY		 1436 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1437
ccd979bd
MF		 1438 osb->slot_num = OCFS2_INVALID_SLOT;
1439
8154da3d
TY		 1440 osb->s_xattr_inline_size = le16_to_cpu(
1441 di->id2.i_super.s_xattr_inline_size);
fdd77704 1442
ccd979bd
MF		 1443 osb->local_alloc_state = OCFS2_LA_UNUSED;
1444 osb->local_alloc_bh = NULL;
9c7af40b 1445 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
ccd979bd 1446
ccd979bd
MF		 1447 init_waitqueue_head(&osb->osb_mount_event);
1448
1449 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1450 if (!osb->vol_label) {
1451 mlog(ML_ERROR, "unable to alloc vol label\n");
1452 status = -ENOMEM;
1453 goto bail;
1454 }
1455
ccd979bd
MF		 1456 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1457 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1458 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1459 osb->max_slots);
1460 status = -EINVAL;
1461 goto bail;
1462 }
781ee3e2 1463 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
ccd979bd 1464
539d8264
SM		 1465 osb->slot_recovery_generations =
1466 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1467 GFP_KERNEL);
1468 if (!osb->slot_recovery_generations) {
1469 status = -ENOMEM;
1470 mlog_errno(status);
1471 goto bail;
1472 }
1473
b4df6ed8
MF		 1474 init_waitqueue_head(&osb->osb_wipe_event);
1475 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1476 sizeof(*osb->osb_orphan_wipes),
1477 GFP_KERNEL);
1478 if (!osb->osb_orphan_wipes) {
1479 status = -ENOMEM;
1480 mlog_errno(status);
1481 goto bail;
1482 }
1483
ccd979bd
MF		 1484 osb->s_feature_compat =
1485 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1486 osb->s_feature_ro_compat =
1487 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1488 osb->s_feature_incompat =
1489 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1490
1491 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1492 mlog(ML_ERROR, "couldn't mount because of unsupported "
1493 "optional features (%x).\n", i);
1494 status = -EINVAL;
1495 goto bail;
1496 }
1497 if (!(osb->sb->s_flags & MS_RDONLY) &&
1498 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1499 mlog(ML_ERROR, "couldn't mount RDWR because of "
1500 "unsupported optional features (%x).\n", i);
1501 status = -EINVAL;
1502 goto bail;
1503 }
1504
b61817e1
JB		 1505 if (ocfs2_userspace_stack(osb)) {
1506 memcpy(osb->osb_cluster_stack,
1507 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1508 OCFS2_STACK_LABEL_LEN);
1509 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1510 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1511 mlog(ML_ERROR,
1512 "couldn't mount because of an invalid "
1513 "cluster stack label (%s) \n",
1514 osb->osb_cluster_stack);
1515 status = -EINVAL;
1516 goto bail;
1517 }
1518 } else {
1519 /* The empty string is identical with classic tools that
1520 * don't know about s_cluster_info. */
1521 osb->osb_cluster_stack[0] = '\0';
1522 }
1523
ccd979bd
MF		 1524 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1525
1526 /* FIXME
1527 * This should be done in ocfs2_journal_init(), but unknown
1528 * ordering issues will cause the filesystem to crash.
1529 * If anyone wants to figure out what part of the code
1530 * refers to osb->journal before ocfs2_journal_init() is run,
1531 * be my guest.
1532 */
1533 /* initialize our journal structure */
1534
cd861280 1535 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 1536 if (!journal) {
1537 mlog(ML_ERROR, "unable to alloc journal\n");
1538 status = -ENOMEM;
1539 goto bail;
1540 }
1541 osb->journal = journal;
1542 journal->j_osb = osb;
1543
1544 atomic_set(&journal->j_num_trans, 0);
1545 init_rwsem(&journal->j_trans_barrier);
1546 init_waitqueue_head(&journal->j_checkpointed);
1547 spin_lock_init(&journal->j_lock);
1548 journal->j_trans_id = (unsigned long) 1;
1549 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 1550 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 1551 journal->j_state = OCFS2_JOURNAL_FREE;
1552
1553 /* get some pseudo constants for clustersize bits */
1554 osb->s_clustersize_bits =
1555 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1556 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1557 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1558
1559 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1560 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1561 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1562 osb->s_clustersize);
1563 status = -EINVAL;
1564 goto bail;
1565 }
1566
1567 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1568 > (u32)~0UL) {
1569 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1570 "what jbd can address in 32 bits.\n");
1571 status = -EINVAL;
1572 goto bail;
1573 }
1574
1575 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1576 sizeof(di->id2.i_super.s_uuid))) {
1577 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1578 status = -ENOMEM;
1579 goto bail;
1580 }
1581
78427043 1582 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
ccd979bd
MF		 1583
1584 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1585 osb->vol_label[63] = '\0';
1586 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1587 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1588 osb->first_cluster_group_blkno =
1589 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1590 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
cf1d6c76 1591 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
ccd979bd
MF		 1592 mlog(0, "vol_label: %s\n", osb->vol_label);
1593 mlog(0, "uuid: %s\n", osb->uuid_str);
b0697053
MF		 1594 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1595 (unsigned long long)osb->root_blkno,
1596 (unsigned long long)osb->system_dir_blkno);
ccd979bd
MF		 1597
1598 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1599 if (!osb->osb_dlm_debug) {
1600 status = -ENOMEM;
1601 mlog_errno(status);
1602 goto bail;
1603 }
1604
1605 atomic_set(&osb->vol_state, VOLUME_INIT);
1606
1607 /* load root, system_dir, and all global system inodes */
1608 status = ocfs2_init_global_system_inodes(osb);
1609 if (status < 0) {
1610 mlog_errno(status);
1611 goto bail;
1612 }
1613
1614 /*
1615 * global bitmap
1616 */
1617 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1618 OCFS2_INVALID_SLOT);
1619 if (!inode) {
1620 status = -EINVAL;
1621 mlog_errno(status);
1622 goto bail;
1623 }
1624
1625 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
ccd979bd 1626 iput(inode);
ccd979bd 1627
e9d578a8 1628 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
ccd979bd
MF		 1629
1630 status = ocfs2_init_slot_info(osb);
1631 if (status < 0) {
1632 mlog_errno(status);
1633 goto bail;
1634 }
1635
ccd979bd
MF		 1636bail:
1637 mlog_exit(status);
1638 return status;
1639}
1640
1641/*
1642 * will return: -EAGAIN if it is ok to keep searching for superblocks
1643 * -EINVAL if there is a bad superblock
1644 * 0 on success
1645 */
1646static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1647 struct buffer_head *bh,
1648 u32 blksz)
1649{
1650 int status = -EAGAIN;
1651
1652 mlog_entry_void();
1653
1654 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1655 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1656 status = -EINVAL;
1657 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1658 mlog(ML_ERROR, "found superblock with incorrect block "
1659 "size: found %u, should be %u\n",
1660 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1661 blksz);
1662 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1663 OCFS2_MAJOR_REV_LEVEL ||
1664 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1665 OCFS2_MINOR_REV_LEVEL) {
1666 mlog(ML_ERROR, "found superblock with bad version: "
1667 "found %u.%u, should be %u.%u\n",
1668 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1669 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1670 OCFS2_MAJOR_REV_LEVEL,
1671 OCFS2_MINOR_REV_LEVEL);
1672 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1673 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 1674 "found %llu, should be %llu\n",
1ca1a111 1675 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 1676 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 1677 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1678 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1679 mlog(ML_ERROR, "bad cluster size found: %u\n",
1680 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1681 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1682 mlog(ML_ERROR, "bad root_blkno: 0\n");
1683 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1684 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1685 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1686 mlog(ML_ERROR,
1687 "Superblock slots found greater than file system "
1688 "maximum: found %u, max %u\n",
1689 le16_to_cpu(di->id2.i_super.s_max_slots),
1690 OCFS2_MAX_SLOTS);
1691 } else {
1692 /* found it! */
1693 status = 0;
1694 }
1695 }
1696
1697 mlog_exit(status);
1698 return status;
1699}
1700
1701static int ocfs2_check_volume(struct ocfs2_super *osb)
1702{
bddb8eb3 1703 int status;
ccd979bd 1704 int dirty;
c271c5c2 1705 int local;
ccd979bd
MF		 1706 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1707 * recover
1708 * ourselves. */
1709
1710 mlog_entry_void();
1711
1712 /* Init our journal object. */
1713 status = ocfs2_journal_init(osb->journal, &dirty);
1714 if (status < 0) {
1715 mlog(ML_ERROR, "Could not initialize journal!\n");
1716 goto finally;
1717 }
1718
1719 /* If the journal was unmounted cleanly then we don't want to
1720 * recover anything. Otherwise, journal_load will do that
1721 * dirty work for us :) */
1722 if (!dirty) {
1723 status = ocfs2_journal_wipe(osb->journal, 0);
1724 if (status < 0) {
1725 mlog_errno(status);
1726 goto finally;
1727 }
1728 } else {
1729 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1730 "recovering volume.\n");
1731 }
1732
c271c5c2
SM		 1733 local = ocfs2_mount_local(osb);
1734
ccd979bd 1735 /* will play back anything left in the journal. */
539d8264 1736 status = ocfs2_journal_load(osb->journal, local, dirty);
01af4820
WW		 1737 if (status < 0) {
1738 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
1739 goto finally;
1740 }
ccd979bd
MF		 1741
1742 if (dirty) {
1743 /* recover my local alloc if we didn't unmount cleanly. */
1744 status = ocfs2_begin_local_alloc_recovery(osb,
1745 osb->slot_num,
1746 &local_alloc);
1747 if (status < 0) {
1748 mlog_errno(status);
1749 goto finally;
1750 }
1751 /* we complete the recovery process after we've marked
1752 * ourselves as mounted. */
1753 }
1754
1755 mlog(0, "Journal loaded.\n");
1756
1757 status = ocfs2_load_local_alloc(osb);
1758 if (status < 0) {
1759 mlog_errno(status);
1760 goto finally;
1761 }
1762
1763 if (dirty) {
1764 /* Recovery will be completed after we've mounted the
1765 * rest of the volume. */
1766 osb->dirty = 1;
1767 osb->local_alloc_copy = local_alloc;
1768 local_alloc = NULL;
1769 }
1770
1771 /* go through each journal, trylock it and if you get the
1772 * lock, and it's marked as dirty, set the bit in the recover
1773 * map and launch a recovery thread for it. */
1774 status = ocfs2_mark_dead_nodes(osb);
1775 if (status < 0)
1776 mlog_errno(status);
1777
1778finally:
1779 if (local_alloc)
1780 kfree(local_alloc);
1781
1782 mlog_exit(status);
1783 return status;
1784}
1785
1786/*
1787 * The routine gets called from dismount or close whenever a dismount on
1788 * volume is requested and the osb open count becomes 1.
1789 * It will remove the osb from the global list and also free up all the
1790 * initialized resources and fileobject.
1791 */
1792static void ocfs2_delete_osb(struct ocfs2_super *osb)
1793{
1794 mlog_entry_void();
1795
1796 /* This function assumes that the caller has the main osb resource */
1797
8e8a4603 1798 ocfs2_free_slot_info(osb);
ccd979bd 1799
b4df6ed8 1800 kfree(osb->osb_orphan_wipes);
539d8264 1801 kfree(osb->slot_recovery_generations);
ccd979bd
MF		 1802 /* FIXME
1803 * This belongs in journal shutdown, but because we have to
1804 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1805 * we free it here.
1806 */
1807 kfree(osb->journal);
1808 if (osb->local_alloc_copy)
1809 kfree(osb->local_alloc_copy);
1810 kfree(osb->uuid_str);
1811 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1812 memset(osb, 0, sizeof(struct ocfs2_super));
1813
1814 mlog_exit_void();
1815}
1816
1817/* Put OCFS2 into a readonly state, or (if the user specifies it),
1818 * panic(). We do not support continue-on-error operation. */
1819static void ocfs2_handle_error(struct super_block *sb)
1820{
1821 struct ocfs2_super *osb = OCFS2_SB(sb);
1822
1823 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1824 panic("OCFS2: (device %s): panic forced after error\n",
1825 sb->s_id);
1826
1827 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1828
1829 if (sb->s_flags & MS_RDONLY &&
1830 (ocfs2_is_soft_readonly(osb) ||
1831 ocfs2_is_hard_readonly(osb)))
1832 return;
1833
1834 printk(KERN_CRIT "File system is now read-only due to the potential "
1835 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1836 "system is unmounted.\n");
1837 sb->s_flags |= MS_RDONLY;
1838 ocfs2_set_ro_flag(osb, 0);
1839}
1840
1841static char error_buf[1024];
1842
1843void __ocfs2_error(struct super_block *sb,
1844 const char *function,
1845 const char *fmt, ...)
1846{
1847 va_list args;
1848
1849 va_start(args, fmt);
4a6e617a 1850 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 1851 va_end(args);
1852
1853 /* Not using mlog here because we want to show the actual
1854 * function the error came from. */
1855 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1856 sb->s_id, function, error_buf);
1857
1858 ocfs2_handle_error(sb);
1859}
1860
1861/* Handle critical errors. This is intentionally more drastic than
1862 * ocfs2_handle_error, so we only use for things like journal errors,
1863 * etc. */
1864void __ocfs2_abort(struct super_block* sb,
1865 const char *function,
1866 const char *fmt, ...)
1867{
1868 va_list args;
1869
1870 va_start(args, fmt);
4a6e617a 1871 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 1872 va_end(args);
1873
1874 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1875 sb->s_id, function, error_buf);
1876
1877 /* We don't have the cluster support yet to go straight to
1878 * hard readonly in here. Until then, we want to keep
1879 * ocfs2_abort() so that we can at least mark critical
1880 * errors.
1881 *
1882 * TODO: This should abort the journal and alert other nodes
1883 * that our slot needs recovery. */
1884
1885 /* Force a panic(). This stinks, but it's better than letting
1886 * things continue without having a proper hard readonly
1887 * here. */
1888 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1889 ocfs2_handle_error(sb);
1890}
1891
1892module_init(ocfs2_init);
1893module_exit(ocfs2_exit);
Linux 6.x block layer and io_uring tree(s)