projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ocfs2: Track local alloc bits internally
[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>
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"
ccd979bd
MF		 67
68#include "buffer_head_io.h"
69
e18b890b 70static struct kmem_cache *ocfs2_inode_cachep = NULL;
ccd979bd 71
ccd979bd
MF		 72/* OCFS2 needs to schedule several differnt types of work which
73 * require cluster locking, disk I/O, recovery waits, etc. Since these
74 * types of work tend to be heavy we avoid using the kernel events
75 * workqueue and schedule on our own. */
76struct workqueue_struct *ocfs2_wq = NULL;
77
78static struct dentry *ocfs2_debugfs_root = NULL;
79
80MODULE_AUTHOR("Oracle");
81MODULE_LICENSE("GPL");
82
c0123ade
TY		 83struct mount_options
84{
d147b3d6 85 unsigned long commit_interval;
c0123ade
TY		 86 unsigned long mount_opt;
87 unsigned int atime_quantum;
88 signed short slot;
2fbe8d1e 89 unsigned int localalloc_opt;
b61817e1 90 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c0123ade
TY		 91};
92
ccd979bd 93static int ocfs2_parse_options(struct super_block *sb, char *options,
c0123ade 94 struct mount_options *mopt,
baf4661a 95 int is_remount);
d550071c 96static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
ccd979bd
MF		 97static void ocfs2_put_super(struct super_block *sb);
98static int ocfs2_mount_volume(struct super_block *sb);
99static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
100static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
101static int ocfs2_initialize_mem_caches(void);
102static void ocfs2_free_mem_caches(void);
103static void ocfs2_delete_osb(struct ocfs2_super *osb);
104
726c3342 105static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
ccd979bd
MF		 106
107static int ocfs2_sync_fs(struct super_block *sb, int wait);
108
109static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
110static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
bddb8eb3 111static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
ccd979bd
MF		 112static int ocfs2_check_volume(struct ocfs2_super *osb);
113static int ocfs2_verify_volume(struct ocfs2_dinode *di,
114 struct buffer_head *bh,
115 u32 sectsize);
116static int ocfs2_initialize_super(struct super_block *sb,
117 struct buffer_head *bh,
118 int sector_size);
119static int ocfs2_get_sector(struct super_block *sb,
120 struct buffer_head **bh,
121 int block,
122 int sect_size);
123static void ocfs2_write_super(struct super_block *sb);
124static struct inode *ocfs2_alloc_inode(struct super_block *sb);
125static void ocfs2_destroy_inode(struct inode *inode);
126
ee9b6d61 127static const struct super_operations ocfs2_sops = {
ccd979bd
MF		 128 .statfs = ocfs2_statfs,
129 .alloc_inode = ocfs2_alloc_inode,
130 .destroy_inode = ocfs2_destroy_inode,
131 .drop_inode = ocfs2_drop_inode,
132 .clear_inode = ocfs2_clear_inode,
133 .delete_inode = ocfs2_delete_inode,
134 .sync_fs = ocfs2_sync_fs,
135 .write_super = ocfs2_write_super,
136 .put_super = ocfs2_put_super,
137 .remount_fs = ocfs2_remount,
d550071c 138 .show_options = ocfs2_show_options,
ccd979bd
MF		 139};
140
141enum {
142 Opt_barrier,
143 Opt_err_panic,
144 Opt_err_ro,
145 Opt_intr,
146 Opt_nointr,
147 Opt_hb_none,
148 Opt_hb_local,
149 Opt_data_ordered,
150 Opt_data_writeback,
7f1a37e3 151 Opt_atime_quantum,
baf4661a 152 Opt_slot,
d147b3d6 153 Opt_commit,
2fbe8d1e 154 Opt_localalloc,
53fc622b 155 Opt_localflocks,
b61817e1 156 Opt_stack,
ccd979bd
MF		 157 Opt_err,
158};
159
a447c093 160static const match_table_t tokens = {
ccd979bd
MF		 161 {Opt_barrier, "barrier=%u"},
162 {Opt_err_panic, "errors=panic"},
163 {Opt_err_ro, "errors=remount-ro"},
164 {Opt_intr, "intr"},
165 {Opt_nointr, "nointr"},
166 {Opt_hb_none, OCFS2_HB_NONE},
167 {Opt_hb_local, OCFS2_HB_LOCAL},
168 {Opt_data_ordered, "data=ordered"},
169 {Opt_data_writeback, "data=writeback"},
7f1a37e3 170 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 171 {Opt_slot, "preferred_slot=%u"},
d147b3d6 172 {Opt_commit, "commit=%u"},
2fbe8d1e 173 {Opt_localalloc, "localalloc=%d"},
53fc622b 174 {Opt_localflocks, "localflocks"},
b61817e1 175 {Opt_stack, "cluster_stack=%s"},
ccd979bd
MF		 176 {Opt_err, NULL}
177};
178
179/*
180 * write_super and sync_fs ripped right out of ext3.
181 */
182static void ocfs2_write_super(struct super_block *sb)
183{
7892f2f4 184 if (mutex_trylock(&sb->s_lock) != 0)
ccd979bd
MF		 185 BUG();
186 sb->s_dirt = 0;
187}
188
189static int ocfs2_sync_fs(struct super_block *sb, int wait)
190{
bddb8eb3 191 int status;
ccd979bd
MF		 192 tid_t target;
193 struct ocfs2_super *osb = OCFS2_SB(sb);
194
195 sb->s_dirt = 0;
196
197 if (ocfs2_is_hard_readonly(osb))
198 return -EROFS;
199
200 if (wait) {
201 status = ocfs2_flush_truncate_log(osb);
202 if (status < 0)
203 mlog_errno(status);
204 } else {
205 ocfs2_schedule_truncate_log_flush(osb, 0);
206 }
207
208 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
209 if (wait)
210 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
211 target);
212 }
213 return 0;
214}
215
216static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
217{
218 struct inode *new = NULL;
219 int status = 0;
220 int i;
221
222 mlog_entry_void();
223
5fa0613e 224 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 225 if (IS_ERR(new)) {
226 status = PTR_ERR(new);
227 mlog_errno(status);
228 goto bail;
229 }
230 osb->root_inode = new;
231
5fa0613e 232 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
ccd979bd
MF		 233 if (IS_ERR(new)) {
234 status = PTR_ERR(new);
235 mlog_errno(status);
236 goto bail;
237 }
238 osb->sys_root_inode = new;
239
240 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
241 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
242 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
243 if (!new) {
244 ocfs2_release_system_inodes(osb);
245 status = -EINVAL;
246 mlog_errno(status);
247 /* FIXME: Should ERROR_RO_FS */
248 mlog(ML_ERROR, "Unable to load system inode %d, "
249 "possibly corrupt fs?", i);
250 goto bail;
251 }
252 // the array now has one ref, so drop this one
253 iput(new);
254 }
255
256bail:
257 mlog_exit(status);
258 return status;
259}
260
261static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
262{
263 struct inode *new = NULL;
264 int status = 0;
265 int i;
266
267 mlog_entry_void();
268
269 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
270 i < NUM_SYSTEM_INODES;
271 i++) {
272 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
273 if (!new) {
274 ocfs2_release_system_inodes(osb);
275 status = -EINVAL;
276 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
277 status, i, osb->slot_num);
278 goto bail;
279 }
280 /* the array now has one ref, so drop this one */
281 iput(new);
282 }
283
284bail:
285 mlog_exit(status);
286 return status;
287}
288
bddb8eb3 289static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
ccd979bd 290{
bddb8eb3 291 int i;
ccd979bd
MF		 292 struct inode *inode;
293
294 mlog_entry_void();
295
296 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
297 inode = osb->system_inodes[i];
298 if (inode) {
299 iput(inode);
300 osb->system_inodes[i] = NULL;
301 }
302 }
303
304 inode = osb->sys_root_inode;
305 if (inode) {
306 iput(inode);
307 osb->sys_root_inode = NULL;
308 }
309
310 inode = osb->root_inode;
311 if (inode) {
312 iput(inode);
313 osb->root_inode = NULL;
314 }
315
bddb8eb3 316 mlog_exit(0);
ccd979bd
MF		 317}
318
319/* We're allocating fs objects, use GFP_NOFS */
320static struct inode *ocfs2_alloc_inode(struct super_block *sb)
321{
322 struct ocfs2_inode_info *oi;
323
e6b4f8da 324 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 325 if (!oi)
326 return NULL;
327
328 return &oi->vfs_inode;
329}
330
331static void ocfs2_destroy_inode(struct inode *inode)
332{
333 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
334}
335
5a254031
MF		 336static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
337 unsigned int cbits)
ccd979bd 338{
5a254031
MF		 339 unsigned int bytes = 1 << cbits;
340 unsigned int trim = bytes;
341 unsigned int bitshift = 32;
342
343 /*
344 * i_size and all block offsets in ocfs2 are always 64 bits
345 * wide. i_clusters is 32 bits, in cluster-sized units. So on
346 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 347 */
348
349#if BITS_PER_LONG == 32
350# if defined(CONFIG_LBD)
2ecd05ae 351 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 352 /*
353 * We might be limited by page cache size.
354 */
355 if (bytes > PAGE_CACHE_SIZE) {
356 bytes = PAGE_CACHE_SIZE;
357 trim = 1;
358 /*
359 * Shift by 31 here so that we don't get larger than
360 * MAX_LFS_FILESIZE
361 */
362 bitshift = 31;
363 }
ccd979bd 364# else
5a254031
MF		 365 /*
366 * We are limited by the size of sector_t. Use block size, as
367 * that's what we expose to the VFS.
368 */
369 bytes = 1 << bbits;
370 trim = 1;
371 bitshift = 31;
ccd979bd
MF		 372# endif
373#endif
374
5a254031
MF		 375 /*
376 * Trim by a whole cluster when we can actually approach the
377 * on-disk limits. Otherwise we can overflow i_clusters when
378 * an extent start is at the max offset.
379 */
380 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 381}
382
383static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
384{
385 int incompat_features;
386 int ret = 0;
c0123ade 387 struct mount_options parsed_options;
ccd979bd
MF		 388 struct ocfs2_super *osb = OCFS2_SB(sb);
389
c0123ade 390 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
ccd979bd
MF		 391 ret = -EINVAL;
392 goto out;
393 }
394
395 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
c0123ade 396 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
ccd979bd
MF		 397 ret = -EINVAL;
398 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
399 goto out;
400 }
401
402 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 403 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 404 ret = -EINVAL;
405 mlog(ML_ERROR, "Cannot change data mode on remount\n");
406 goto out;
407 }
408
409 /* We're going to/from readonly mode. */
410 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
411 /* Lock here so the check of HARD_RO and the potential
412 * setting of SOFT_RO is atomic. */
413 spin_lock(&osb->osb_lock);
414 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
415 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
416 ret = -EROFS;
417 goto unlock_osb;
418 }
419
420 if (*flags & MS_RDONLY) {
421 mlog(0, "Going to ro mode.\n");
422 sb->s_flags |= MS_RDONLY;
423 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
424 } else {
425 mlog(0, "Making ro filesystem writeable.\n");
426
427 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
428 mlog(ML_ERROR, "Cannot remount RDWR "
429 "filesystem due to previous errors.\n");
430 ret = -EROFS;
431 goto unlock_osb;
432 }
433 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
434 if (incompat_features) {
435 mlog(ML_ERROR, "Cannot remount RDWR because "
436 "of unsupported optional features "
437 "(%x).\n", incompat_features);
438 ret = -EINVAL;
439 goto unlock_osb;
440 }
441 sb->s_flags &= ~MS_RDONLY;
442 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
443 }
444unlock_osb:
445 spin_unlock(&osb->osb_lock);
446 }
447
448 if (!ret) {
ccd979bd
MF		 449 /* Only save off the new mount options in case of a successful
450 * remount. */
c0123ade
TY		 451 osb->s_mount_opt = parsed_options.mount_opt;
452 osb->s_atime_quantum = parsed_options.atime_quantum;
453 osb->preferred_slot = parsed_options.slot;
d147b3d6
MF		 454 if (parsed_options.commit_interval)
455 osb->osb_commit_interval = parsed_options.commit_interval;
e001e796
MF		 456
457 if (!ocfs2_is_hard_readonly(osb))
458 ocfs2_set_journal_params(osb);
ccd979bd
MF		 459 }
460out:
461 return ret;
462}
463
464static int ocfs2_sb_probe(struct super_block *sb,
465 struct buffer_head **bh,
466 int *sector_size)
467{
bddb8eb3 468 int status, tmpstat;
ccd979bd
MF		 469 struct ocfs1_vol_disk_hdr *hdr;
470 struct ocfs2_dinode *di;
471 int blksize;
472
473 *bh = NULL;
474
475 /* may be > 512 */
476 *sector_size = bdev_hardsect_size(sb->s_bdev);
477 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
478 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
479 *sector_size, OCFS2_MAX_BLOCKSIZE);
480 status = -EINVAL;
481 goto bail;
482 }
483
484 /* Can this really happen? */
485 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
486 *sector_size = OCFS2_MIN_BLOCKSIZE;
487
488 /* check block zero for old format */
489 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
490 if (status < 0) {
491 mlog_errno(status);
492 goto bail;
493 }
494 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
495 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
496 mlog(ML_ERROR, "incompatible version: %u.%u\n",
497 hdr->major_version, hdr->minor_version);
498 status = -EINVAL;
499 }
500 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
501 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
502 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
503 hdr->signature);
504 status = -EINVAL;
505 }
506 brelse(*bh);
507 *bh = NULL;
508 if (status < 0) {
509 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
510 "upgraded before mounting with ocfs v2\n");
511 goto bail;
512 }
513
514 /*
515 * Now check at magic offset for 512, 1024, 2048, 4096
516 * blocksizes. 4096 is the maximum blocksize because it is
517 * the minimum clustersize.
518 */
519 status = -EINVAL;
520 for (blksize = *sector_size;
521 blksize <= OCFS2_MAX_BLOCKSIZE;
522 blksize <<= 1) {
523 tmpstat = ocfs2_get_sector(sb, bh,
524 OCFS2_SUPER_BLOCK_BLKNO,
525 blksize);
526 if (tmpstat < 0) {
527 status = tmpstat;
528 mlog_errno(status);
529 goto bail;
530 }
531 di = (struct ocfs2_dinode *) (*bh)->b_data;
532 status = ocfs2_verify_volume(di, *bh, blksize);
533 if (status >= 0)
534 goto bail;
535 brelse(*bh);
536 *bh = NULL;
537 if (status != -EAGAIN)
538 break;
539 }
540
541bail:
542 return status;
543}
544
c271c5c2
SM		 545static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
546{
547 if (ocfs2_mount_local(osb)) {
548 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
549 mlog(ML_ERROR, "Cannot heartbeat on a locally "
550 "mounted device.\n");
551 return -EINVAL;
552 }
553 }
554
b61817e1
JB		 555 if (ocfs2_userspace_stack(osb)) {
556 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
557 mlog(ML_ERROR, "Userspace stack expected, but "
558 "o2cb heartbeat arguments passed to mount\n");
559 return -EINVAL;
560 }
561 }
562
c271c5c2 563 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
b61817e1
JB		 564 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
565 !ocfs2_userspace_stack(osb)) {
c271c5c2
SM		 566 mlog(ML_ERROR, "Heartbeat has to be started to mount "
567 "a read-write clustered device.\n");
568 return -EINVAL;
569 }
570 }
571
572 return 0;
573}
574
b61817e1
JB		 575/*
576 * If we're using a userspace stack, mount should have passed
577 * a name that matches the disk. If not, mount should not
578 * have passed a stack.
579 */
580static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
581 struct mount_options *mopt)
582{
583 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
584 mlog(ML_ERROR,
585 "cluster stack passed to mount, but this filesystem "
586 "does not support it\n");
587 return -EINVAL;
588 }
589
590 if (ocfs2_userspace_stack(osb) &&
591 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
592 OCFS2_STACK_LABEL_LEN)) {
593 mlog(ML_ERROR,
594 "cluster stack passed to mount (\"%s\") does not "
595 "match the filesystem (\"%s\")\n",
596 mopt->cluster_stack,
597 osb->osb_cluster_stack);
598 return -EINVAL;
599 }
600
601 return 0;
602}
603
ccd979bd
MF		 604static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
605{
606 struct dentry *root;
607 int status, sector_size;
c0123ade 608 struct mount_options parsed_options;
ccd979bd
MF		 609 struct inode *inode = NULL;
610 struct ocfs2_super *osb = NULL;
611 struct buffer_head *bh = NULL;
c271c5c2 612 char nodestr[8];
ccd979bd
MF		 613
614 mlog_entry("%p, %p, %i", sb, data, silent);
615
c0123ade 616 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 617 status = -EINVAL;
618 goto read_super_error;
619 }
620
621 /* probe for superblock */
622 status = ocfs2_sb_probe(sb, &bh, &sector_size);
623 if (status < 0) {
624 mlog(ML_ERROR, "superblock probe failed!\n");
625 goto read_super_error;
626 }
627
628 status = ocfs2_initialize_super(sb, bh, sector_size);
629 osb = OCFS2_SB(sb);
630 if (status < 0) {
631 mlog_errno(status);
632 goto read_super_error;
633 }
634 brelse(bh);
635 bh = NULL;
c0123ade
TY		 636 osb->s_mount_opt = parsed_options.mount_opt;
637 osb->s_atime_quantum = parsed_options.atime_quantum;
638 osb->preferred_slot = parsed_options.slot;
d147b3d6 639 osb->osb_commit_interval = parsed_options.commit_interval;
ebcee4b5 640 osb->local_alloc_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
ccd979bd 641
b61817e1
JB		 642 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
643 if (status)
644 goto read_super_error;
645
ccd979bd
MF		 646 sb->s_magic = OCFS2_SUPER_MAGIC;
647
648 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
649 * heartbeat=none */
650 if (bdev_read_only(sb->s_bdev)) {
651 if (!(sb->s_flags & MS_RDONLY)) {
652 status = -EACCES;
653 mlog(ML_ERROR, "Readonly device detected but readonly "
654 "mount was not specified.\n");
655 goto read_super_error;
656 }
657
658 /* You should not be able to start a local heartbeat
659 * on a readonly device. */
660 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
661 status = -EROFS;
662 mlog(ML_ERROR, "Local heartbeat specified on readonly "
663 "device.\n");
664 goto read_super_error;
665 }
666
667 status = ocfs2_check_journals_nolocks(osb);
668 if (status < 0) {
669 if (status == -EROFS)
670 mlog(ML_ERROR, "Recovery required on readonly "
671 "file system, but write access is "
672 "unavailable.\n");
673 else
674 mlog_errno(status);
675 goto read_super_error;
676 }
677
678 ocfs2_set_ro_flag(osb, 1);
679
680 printk(KERN_NOTICE "Readonly device detected. No cluster "
681 "services will be utilized for this mount. Recovery "
682 "will be skipped.\n");
683 }
684
685 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 686 if (sb->s_flags & MS_RDONLY)
687 ocfs2_set_ro_flag(osb, 0);
688 }
689
c271c5c2
SM		 690 status = ocfs2_verify_heartbeat(osb);
691 if (status < 0) {
692 mlog_errno(status);
693 goto read_super_error;
694 }
695
ccd979bd
MF		 696 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
697 ocfs2_debugfs_root);
698 if (!osb->osb_debug_root) {
699 status = -EINVAL;
700 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
701 goto read_super_error;
702 }
703
704 status = ocfs2_mount_volume(sb);
705 if (osb->root_inode)
706 inode = igrab(osb->root_inode);
707
708 if (status < 0)
709 goto read_super_error;
710
711 if (!inode) {
712 status = -EIO;
713 mlog_errno(status);
714 goto read_super_error;
715 }
716
717 root = d_alloc_root(inode);
718 if (!root) {
719 status = -ENOMEM;
720 mlog_errno(status);
721 goto read_super_error;
722 }
723
724 sb->s_root = root;
725
726 ocfs2_complete_mount_recovery(osb);
727
c271c5c2
SM		 728 if (ocfs2_mount_local(osb))
729 snprintf(nodestr, sizeof(nodestr), "local");
730 else
19fdb624 731 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 732
733 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 734 "with %s data mode.\n",
c271c5c2 735 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 736 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
737 "ordered");
738
739 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
740 wake_up(&osb->osb_mount_event);
741
742 mlog_exit(status);
743 return status;
744
745read_super_error:
746 if (bh != NULL)
747 brelse(bh);
748
749 if (inode)
750 iput(inode);
751
752 if (osb) {
753 atomic_set(&osb->vol_state, VOLUME_DISABLED);
754 wake_up(&osb->osb_mount_event);
755 ocfs2_dismount_volume(sb, 1);
756 }
757
758 mlog_exit(status);
759 return status;
760}
761
454e2398
DH		 762static int ocfs2_get_sb(struct file_system_type *fs_type,
763 int flags,
764 const char *dev_name,
765 void *data,
766 struct vfsmount *mnt)
ccd979bd 767{
454e2398
DH		 768 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
769 mnt);
ccd979bd
MF		 770}
771
772static struct file_system_type ocfs2_fs_type = {
773 .owner = THIS_MODULE,
774 .name = "ocfs2",
775 .get_sb = ocfs2_get_sb, /* is this called when we mount
776 * the fs? */
777 .kill_sb = kill_block_super, /* set to the generic one
778 * right now, but do we
779 * need to change that? */
1ba9da2f 780 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 781 .next = NULL
782};
783
784static int ocfs2_parse_options(struct super_block *sb,
785 char *options,
c0123ade 786 struct mount_options *mopt,
ccd979bd
MF		 787 int is_remount)
788{
789 int status;
790 char *p;
791
792 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
793 options ? options : "(none)");
794
d147b3d6 795 mopt->commit_interval = 0;
c0123ade
TY		 796 mopt->mount_opt = 0;
797 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
798 mopt->slot = OCFS2_INVALID_SLOT;
2fbe8d1e 799 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
b61817e1 800 mopt->cluster_stack[0] = '\0';
ccd979bd
MF		 801
802 if (!options) {
803 status = 1;
804 goto bail;
805 }
806
807 while ((p = strsep(&options, ",")) != NULL) {
808 int token, option;
809 substring_t args[MAX_OPT_ARGS];
810
811 if (!*p)
812 continue;
813
814 token = match_token(p, tokens, args);
815 switch (token) {
816 case Opt_hb_local:
c0123ade 817 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 818 break;
819 case Opt_hb_none:
c0123ade 820 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 821 break;
822 case Opt_barrier:
823 if (match_int(&args[0], &option)) {
824 status = 0;
825 goto bail;
826 }
827 if (option)
c0123ade 828 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 829 else
c0123ade 830 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 831 break;
832 case Opt_intr:
c0123ade 833 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 834 break;
835 case Opt_nointr:
c0123ade 836 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 837 break;
838 case Opt_err_panic:
c0123ade 839 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 840 break;
841 case Opt_err_ro:
c0123ade 842 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 843 break;
844 case Opt_data_ordered:
c0123ade 845 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 846 break;
847 case Opt_data_writeback:
c0123ade 848 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 849 break;
7f1a37e3
TY		 850 case Opt_atime_quantum:
851 if (match_int(&args[0], &option)) {
852 status = 0;
853 goto bail;
854 }
855 if (option >= 0)
c0123ade 856 mopt->atime_quantum = option;
7f1a37e3 857 break;
baf4661a
SM		 858 case Opt_slot:
859 option = 0;
860 if (match_int(&args[0], &option)) {
861 status = 0;
862 goto bail;
863 }
864 if (option)
c0123ade 865 mopt->slot = (s16)option;
baf4661a 866 break;
d147b3d6
MF		 867 case Opt_commit:
868 option = 0;
869 if (match_int(&args[0], &option)) {
870 status = 0;
871 goto bail;
872 }
873 if (option < 0)
874 return 0;
875 if (option == 0)
876 option = JBD_DEFAULT_MAX_COMMIT_AGE;
877 mopt->commit_interval = HZ * option;
878 break;
2fbe8d1e
SM		 879 case Opt_localalloc:
880 option = 0;
881 if (match_int(&args[0], &option)) {
882 status = 0;
883 goto bail;
884 }
885 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
886 mopt->localalloc_opt = option;
887 break;
53fc622b
MF		 888 case Opt_localflocks:
889 /*
890 * Changing this during remount could race
891 * flock() requests, or "unbalance" existing
892 * ones (e.g., a lock is taken in one mode but
893 * dropped in the other). If users care enough
894 * to flip locking modes during remount, we
895 * could add a "local" flag to individual
896 * flock structures for proper tracking of
897 * state.
898 */
899 if (!is_remount)
900 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
901 break;
b61817e1
JB		 902 case Opt_stack:
903 /* Check both that the option we were passed
904 * is of the right length and that it is a proper
905 * string of the right length.
906 */
907 if (((args[0].to - args[0].from) !=
908 OCFS2_STACK_LABEL_LEN) ||
909 (strnlen(args[0].from,
910 OCFS2_STACK_LABEL_LEN) !=
911 OCFS2_STACK_LABEL_LEN)) {
912 mlog(ML_ERROR,
913 "Invalid cluster_stack option\n");
914 status = 0;
915 goto bail;
916 }
917 memcpy(mopt->cluster_stack, args[0].from,
918 OCFS2_STACK_LABEL_LEN);
919 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
920 break;
ccd979bd
MF		 921 default:
922 mlog(ML_ERROR,
923 "Unrecognized mount option \"%s\" "
924 "or missing value\n", p);
925 status = 0;
926 goto bail;
927 }
928 }
929
930 status = 1;
931
932bail:
933 mlog_exit(status);
934 return status;
935}
936
d550071c
SM		 937static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
938{
939 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
940 unsigned long opts = osb->s_mount_opt;
ebcee4b5 941 unsigned int local_alloc_megs;
d550071c
SM		 942
943 if (opts & OCFS2_MOUNT_HB_LOCAL)
944 seq_printf(s, ",_netdev,heartbeat=local");
945 else
946 seq_printf(s, ",heartbeat=none");
947
948 if (opts & OCFS2_MOUNT_NOINTR)
949 seq_printf(s, ",nointr");
950
951 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
952 seq_printf(s, ",data=writeback");
953 else
954 seq_printf(s, ",data=ordered");
955
956 if (opts & OCFS2_MOUNT_BARRIER)
957 seq_printf(s, ",barrier=1");
958
959 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
960 seq_printf(s, ",errors=panic");
961 else
962 seq_printf(s, ",errors=remount-ro");
963
964 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
965 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
966
967 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
968 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
969
d147b3d6
MF		 970 if (osb->osb_commit_interval)
971 seq_printf(s, ",commit=%u",
972 (unsigned) (osb->osb_commit_interval / HZ));
973
ebcee4b5
MF		 974 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
975 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
976 seq_printf(s, ",localalloc=%d", local_alloc_megs);
2fbe8d1e 977
53fc622b
MF		 978 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
979 seq_printf(s, ",localflocks,");
980
b61817e1
JB		 981 if (osb->osb_cluster_stack[0])
982 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
983 osb->osb_cluster_stack);
984
d550071c
SM		 985 return 0;
986}
987
ccd979bd
MF		 988static int __init ocfs2_init(void)
989{
990 int status;
991
992 mlog_entry_void();
993
994 ocfs2_print_version();
995
ccd979bd
MF		 996 status = init_ocfs2_uptodate_cache();
997 if (status < 0) {
998 mlog_errno(status);
999 goto leave;
1000 }
1001
1002 status = ocfs2_initialize_mem_caches();
1003 if (status < 0) {
1004 mlog_errno(status);
1005 goto leave;
1006 }
1007
1008 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1009 if (!ocfs2_wq) {
1010 status = -ENOMEM;
1011 goto leave;
1012 }
1013
ccd979bd
MF		 1014 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1015 if (!ocfs2_debugfs_root) {
1016 status = -EFAULT;
1017 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1018 }
1019
63e0c48a
JB		 1020 ocfs2_set_locking_protocol();
1021
ccd979bd
MF		 1022leave:
1023 if (status < 0) {
1024 ocfs2_free_mem_caches();
1025 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 1026 }
1027
1028 mlog_exit(status);
1029
1030 if (status >= 0) {
1031 return register_filesystem(&ocfs2_fs_type);
1032 } else
1033 return -1;
1034}
1035
1036static void __exit ocfs2_exit(void)
1037{
1038 mlog_entry_void();
1039
1040 if (ocfs2_wq) {
1041 flush_workqueue(ocfs2_wq);
1042 destroy_workqueue(ocfs2_wq);
1043 }
1044
1045 debugfs_remove(ocfs2_debugfs_root);
1046
1047 ocfs2_free_mem_caches();
1048
1049 unregister_filesystem(&ocfs2_fs_type);
1050
ccd979bd
MF		 1051 exit_ocfs2_uptodate_cache();
1052
1053 mlog_exit_void();
1054}
1055
1056static void ocfs2_put_super(struct super_block *sb)
1057{
1058 mlog_entry("(0x%p)\n", sb);
1059
1060 ocfs2_sync_blockdev(sb);
1061 ocfs2_dismount_volume(sb, 0);
1062
1063 mlog_exit_void();
1064}
1065
726c3342 1066static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 1067{
1068 struct ocfs2_super *osb;
1069 u32 numbits, freebits;
1070 int status;
1071 struct ocfs2_dinode *bm_lock;
1072 struct buffer_head *bh = NULL;
1073 struct inode *inode = NULL;
1074
726c3342 1075 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
ccd979bd 1076
726c3342 1077 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 1078
1079 inode = ocfs2_get_system_file_inode(osb,
1080 GLOBAL_BITMAP_SYSTEM_INODE,
1081 OCFS2_INVALID_SLOT);
1082 if (!inode) {
1083 mlog(ML_ERROR, "failed to get bitmap inode\n");
1084 status = -EIO;
1085 goto bail;
1086 }
1087
e63aecb6 1088 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1089 if (status < 0) {
1090 mlog_errno(status);
1091 goto bail;
1092 }
1093
1094 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1095
1096 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1097 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1098
1099 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1100 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1101 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1102 buf->f_blocks = ((sector_t) numbits) *
1103 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1104 buf->f_bfree = ((sector_t) freebits) *
1105 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1106 buf->f_bavail = buf->f_bfree;
1107 buf->f_files = numbits;
1108 buf->f_ffree = freebits;
1109
1110 brelse(bh);
1111
e63aecb6 1112 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1113 status = 0;
1114bail:
1115 if (inode)
1116 iput(inode);
1117
1118 mlog_exit(status);
1119
1120 return status;
1121}
1122
51cc5068 1123static void ocfs2_inode_init_once(void *data)
ccd979bd
MF		 1124{
1125 struct ocfs2_inode_info *oi = data;
1126
a35afb83
CL		 1127 oi->ip_flags = 0;
1128 oi->ip_open_count = 0;
1129 spin_lock_init(&oi->ip_lock);
1130 ocfs2_extent_map_init(&oi->vfs_inode);
1131 INIT_LIST_HEAD(&oi->ip_io_markers);
1132 oi->ip_created_trans = 0;
1133 oi->ip_last_trans = 0;
1134 oi->ip_dir_start_lookup = 0;
ccd979bd 1135
a35afb83
CL		 1136 init_rwsem(&oi->ip_alloc_sem);
1137 mutex_init(&oi->ip_io_mutex);
ccd979bd 1138
a35afb83
CL		 1139 oi->ip_blkno = 0ULL;
1140 oi->ip_clusters = 0;
ccd979bd 1141
a35afb83 1142 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1143 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1144 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1145
a35afb83 1146 ocfs2_metadata_cache_init(&oi->vfs_inode);
ccd979bd 1147
a35afb83 1148 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1149}
1150
1151static int ocfs2_initialize_mem_caches(void)
1152{
1153 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1154 sizeof(struct ocfs2_inode_info),
1155 0,
1156 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1157 SLAB_MEM_SPREAD),
20c2df83 1158 ocfs2_inode_init_once);
ccd979bd
MF		 1159 if (!ocfs2_inode_cachep)
1160 return -ENOMEM;
1161
ccd979bd
MF		 1162 return 0;
1163}
1164
1165static void ocfs2_free_mem_caches(void)
1166{
1167 if (ocfs2_inode_cachep)
1168 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd
MF		 1169
1170 ocfs2_inode_cachep = NULL;
ccd979bd
MF		 1171}
1172
1173static int ocfs2_get_sector(struct super_block *sb,
1174 struct buffer_head **bh,
1175 int block,
1176 int sect_size)
1177{
1178 if (!sb_set_blocksize(sb, sect_size)) {
1179 mlog(ML_ERROR, "unable to set blocksize\n");
1180 return -EIO;
1181 }
1182
1183 *bh = sb_getblk(sb, block);
1184 if (!*bh) {
1185 mlog_errno(-EIO);
1186 return -EIO;
1187 }
1188 lock_buffer(*bh);
1189 if (!buffer_dirty(*bh))
1190 clear_buffer_uptodate(*bh);
1191 unlock_buffer(*bh);
1192 ll_rw_block(READ, 1, bh);
1193 wait_on_buffer(*bh);
1194 return 0;
1195}
1196
ccd979bd
MF		 1197static int ocfs2_mount_volume(struct super_block *sb)
1198{
1199 int status = 0;
1200 int unlock_super = 0;
1201 struct ocfs2_super *osb = OCFS2_SB(sb);
1202
1203 mlog_entry_void();
1204
1205 if (ocfs2_is_hard_readonly(osb))
1206 goto leave;
1207
ccd979bd
MF		 1208 status = ocfs2_dlm_init(osb);
1209 if (status < 0) {
1210 mlog_errno(status);
1211 goto leave;
1212 }
1213
ccd979bd
MF		 1214 status = ocfs2_super_lock(osb, 1);
1215 if (status < 0) {
1216 mlog_errno(status);
1217 goto leave;
1218 }
1219 unlock_super = 1;
1220
1221 /* This will load up the node map and add ourselves to it. */
1222 status = ocfs2_find_slot(osb);
1223 if (status < 0) {
1224 mlog_errno(status);
1225 goto leave;
1226 }
1227
ccd979bd
MF		 1228 /* load all node-local system inodes */
1229 status = ocfs2_init_local_system_inodes(osb);
1230 if (status < 0) {
1231 mlog_errno(status);
1232 goto leave;
1233 }
1234
1235 status = ocfs2_check_volume(osb);
1236 if (status < 0) {
1237 mlog_errno(status);
1238 goto leave;
1239 }
1240
1241 status = ocfs2_truncate_log_init(osb);
1242 if (status < 0) {
1243 mlog_errno(status);
1244 goto leave;
1245 }
1246
c271c5c2
SM		 1247 if (ocfs2_mount_local(osb))
1248 goto leave;
1249
ccd979bd
MF		 1250leave:
1251 if (unlock_super)
1252 ocfs2_super_unlock(osb, 1);
1253
1254 mlog_exit(status);
1255 return status;
1256}
1257
ccd979bd
MF		 1258static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1259{
286eaa95 1260 int tmp, hangup_needed = 0;
ccd979bd 1261 struct ocfs2_super *osb = NULL;
c271c5c2 1262 char nodestr[8];
ccd979bd
MF		 1263
1264 mlog_entry("(0x%p)\n", sb);
1265
1266 BUG_ON(!sb);
1267 osb = OCFS2_SB(sb);
1268 BUG_ON(!osb);
1269
1270 ocfs2_shutdown_local_alloc(osb);
1271
1272 ocfs2_truncate_log_shutdown(osb);
1273
553abd04
JB		 1274 /* This will disable recovery and flush any recovery work. */
1275 ocfs2_recovery_exit(osb);
ccd979bd
MF		 1276
1277 ocfs2_journal_shutdown(osb);
1278
1279 ocfs2_sync_blockdev(sb);
1280
4670c46d
JB		 1281 /* No cluster connection means we've failed during mount, so skip
1282 * all the steps which depended on that to complete. */
1283 if (osb->cconn) {
ccd979bd
MF		 1284 tmp = ocfs2_super_lock(osb, 1);
1285 if (tmp < 0) {
1286 mlog_errno(tmp);
1287 return;
1288 }
19b613d4 1289 }
ccd979bd 1290
19b613d4
MF		 1291 if (osb->slot_num != OCFS2_INVALID_SLOT)
1292 ocfs2_put_slot(osb);
ccd979bd 1293
4670c46d 1294 if (osb->cconn)
ccd979bd 1295 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1296
1297 ocfs2_release_system_inodes(osb);
1298
6953b4c0 1299 /*
6953b4c0
JB		 1300 * If we're dismounting due to mount error, mount.ocfs2 will clean
1301 * up heartbeat. If we're a local mount, there is no heartbeat.
1302 * If we failed before we got a uuid_str yet, we can't stop
1303 * heartbeat. Otherwise, do it.
1304 */
1305 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
286eaa95
JB		 1306 hangup_needed = 1;
1307
1308 if (osb->cconn)
1309 ocfs2_dlm_shutdown(osb, hangup_needed);
1310
1311 debugfs_remove(osb->osb_debug_root);
1312
1313 if (hangup_needed)
6953b4c0 1314 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
ccd979bd
MF		 1315
1316 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1317
c271c5c2
SM		 1318 if (ocfs2_mount_local(osb))
1319 snprintf(nodestr, sizeof(nodestr), "local");
1320 else
19fdb624 1321 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
c271c5c2
SM		 1322
1323 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1324 osb->dev_str, nodestr);
ccd979bd
MF		 1325
1326 ocfs2_delete_osb(osb);
1327 kfree(osb);
1328 sb->s_dev = 0;
1329 sb->s_fs_info = NULL;
1330}
1331
1332static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1333 unsigned uuid_bytes)
1334{
1335 int i, ret;
1336 char *ptr;
1337
1338 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1339
cd861280 1340 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 1341 if (osb->uuid_str == NULL)
1342 return -ENOMEM;
1343
ccd979bd
MF		 1344 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1345 /* print with null */
1346 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1347 if (ret != 2) /* drop super cleans up */
1348 return -EINVAL;
1349 /* then only advance past the last char */
1350 ptr += 2;
1351 }
1352
1353 return 0;
1354}
1355
1356static int ocfs2_initialize_super(struct super_block *sb,
1357 struct buffer_head *bh,
1358 int sector_size)
1359{
bddb8eb3 1360 int status;
5a254031
MF		 1361 int i, cbits, bbits;
1362 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 1363 struct inode *inode = NULL;
ccd979bd
MF		 1364 struct ocfs2_journal *journal;
1365 __le32 uuid_net_key;
1366 struct ocfs2_super *osb;
1367
1368 mlog_entry_void();
1369
cd861280 1370 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 1371 if (!osb) {
1372 status = -ENOMEM;
1373 mlog_errno(status);
1374 goto bail;
1375 }
1376
1377 sb->s_fs_info = osb;
1378 sb->s_op = &ocfs2_sops;
1379 sb->s_export_op = &ocfs2_export_ops;
e0dceaf0 1380 sb->s_time_gran = 1;
ccd979bd
MF		 1381 sb->s_flags |= MS_NOATIME;
1382 /* this is needed to support O_LARGEFILE */
5a254031
MF		 1383 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1384 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1385 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
ccd979bd
MF		 1386
1387 osb->sb = sb;
1388 /* Save off for ocfs2_rw_direct */
1389 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 1390 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 1391
34d024f8
MF		 1392 spin_lock_init(&osb->dc_task_lock);
1393 init_waitqueue_head(&osb->dc_event);
1394 osb->dc_work_sequence = 0;
1395 osb->dc_wake_sequence = 0;
ccd979bd
MF		 1396 INIT_LIST_HEAD(&osb->blocked_lock_list);
1397 osb->blocked_lock_count = 0;
ccd979bd 1398 spin_lock_init(&osb->osb_lock);
4d0ddb2c 1399 ocfs2_init_inode_steal_slot(osb);
ccd979bd
MF		 1400
1401 atomic_set(&osb->alloc_stats.moves, 0);
1402 atomic_set(&osb->alloc_stats.local_data, 0);
1403 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1404 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1405 atomic_set(&osb->alloc_stats.bg_extends, 0);
1406
1407 ocfs2_init_node_maps(osb);
1408
1409 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1410 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1411
553abd04
JB		 1412 status = ocfs2_recovery_init(osb);
1413 if (status) {
1414 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1415 mlog_errno(status);
1416 goto bail;
1417 }
ccd979bd
MF		 1418
1419 init_waitqueue_head(&osb->checkpoint_event);
1420 atomic_set(&osb->needs_checkpoint, 0);
1421
7f1a37e3
TY		 1422 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1423
ccd979bd
MF		 1424 osb->slot_num = OCFS2_INVALID_SLOT;
1425
1426 osb->local_alloc_state = OCFS2_LA_UNUSED;
1427 osb->local_alloc_bh = NULL;
1428
ccd979bd
MF		 1429 init_waitqueue_head(&osb->osb_mount_event);
1430
1431 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1432 if (!osb->vol_label) {
1433 mlog(ML_ERROR, "unable to alloc vol label\n");
1434 status = -ENOMEM;
1435 goto bail;
1436 }
1437
ccd979bd
MF		 1438 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1439 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1440 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1441 osb->max_slots);
1442 status = -EINVAL;
1443 goto bail;
1444 }
781ee3e2 1445 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
ccd979bd 1446
539d8264
SM		 1447 osb->slot_recovery_generations =
1448 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1449 GFP_KERNEL);
1450 if (!osb->slot_recovery_generations) {
1451 status = -ENOMEM;
1452 mlog_errno(status);
1453 goto bail;
1454 }
1455
b4df6ed8
MF		 1456 init_waitqueue_head(&osb->osb_wipe_event);
1457 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1458 sizeof(*osb->osb_orphan_wipes),
1459 GFP_KERNEL);
1460 if (!osb->osb_orphan_wipes) {
1461 status = -ENOMEM;
1462 mlog_errno(status);
1463 goto bail;
1464 }
1465
ccd979bd
MF		 1466 osb->s_feature_compat =
1467 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1468 osb->s_feature_ro_compat =
1469 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1470 osb->s_feature_incompat =
1471 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1472
1473 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1474 mlog(ML_ERROR, "couldn't mount because of unsupported "
1475 "optional features (%x).\n", i);
1476 status = -EINVAL;
1477 goto bail;
1478 }
1479 if (!(osb->sb->s_flags & MS_RDONLY) &&
1480 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1481 mlog(ML_ERROR, "couldn't mount RDWR because of "
1482 "unsupported optional features (%x).\n", i);
1483 status = -EINVAL;
1484 goto bail;
1485 }
1486
b61817e1
JB		 1487 if (ocfs2_userspace_stack(osb)) {
1488 memcpy(osb->osb_cluster_stack,
1489 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1490 OCFS2_STACK_LABEL_LEN);
1491 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1492 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1493 mlog(ML_ERROR,
1494 "couldn't mount because of an invalid "
1495 "cluster stack label (%s) \n",
1496 osb->osb_cluster_stack);
1497 status = -EINVAL;
1498 goto bail;
1499 }
1500 } else {
1501 /* The empty string is identical with classic tools that
1502 * don't know about s_cluster_info. */
1503 osb->osb_cluster_stack[0] = '\0';
1504 }
1505
ccd979bd
MF		 1506 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1507
1508 /* FIXME
1509 * This should be done in ocfs2_journal_init(), but unknown
1510 * ordering issues will cause the filesystem to crash.
1511 * If anyone wants to figure out what part of the code
1512 * refers to osb->journal before ocfs2_journal_init() is run,
1513 * be my guest.
1514 */
1515 /* initialize our journal structure */
1516
cd861280 1517 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 1518 if (!journal) {
1519 mlog(ML_ERROR, "unable to alloc journal\n");
1520 status = -ENOMEM;
1521 goto bail;
1522 }
1523 osb->journal = journal;
1524 journal->j_osb = osb;
1525
1526 atomic_set(&journal->j_num_trans, 0);
1527 init_rwsem(&journal->j_trans_barrier);
1528 init_waitqueue_head(&journal->j_checkpointed);
1529 spin_lock_init(&journal->j_lock);
1530 journal->j_trans_id = (unsigned long) 1;
1531 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 1532 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 1533 journal->j_state = OCFS2_JOURNAL_FREE;
1534
1535 /* get some pseudo constants for clustersize bits */
1536 osb->s_clustersize_bits =
1537 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1538 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1539 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1540
1541 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1542 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1543 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1544 osb->s_clustersize);
1545 status = -EINVAL;
1546 goto bail;
1547 }
1548
1549 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1550 > (u32)~0UL) {
1551 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1552 "what jbd can address in 32 bits.\n");
1553 status = -EINVAL;
1554 goto bail;
1555 }
1556
1557 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1558 sizeof(di->id2.i_super.s_uuid))) {
1559 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1560 status = -ENOMEM;
1561 goto bail;
1562 }
1563
78427043 1564 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
ccd979bd
MF		 1565
1566 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1567 osb->vol_label[63] = '\0';
1568 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1569 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1570 osb->first_cluster_group_blkno =
1571 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1572 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1573 mlog(0, "vol_label: %s\n", osb->vol_label);
1574 mlog(0, "uuid: %s\n", osb->uuid_str);
b0697053
MF		 1575 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1576 (unsigned long long)osb->root_blkno,
1577 (unsigned long long)osb->system_dir_blkno);
ccd979bd
MF		 1578
1579 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1580 if (!osb->osb_dlm_debug) {
1581 status = -ENOMEM;
1582 mlog_errno(status);
1583 goto bail;
1584 }
1585
1586 atomic_set(&osb->vol_state, VOLUME_INIT);
1587
1588 /* load root, system_dir, and all global system inodes */
1589 status = ocfs2_init_global_system_inodes(osb);
1590 if (status < 0) {
1591 mlog_errno(status);
1592 goto bail;
1593 }
1594
1595 /*
1596 * global bitmap
1597 */
1598 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1599 OCFS2_INVALID_SLOT);
1600 if (!inode) {
1601 status = -EINVAL;
1602 mlog_errno(status);
1603 goto bail;
1604 }
1605
1606 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
ccd979bd 1607 iput(inode);
ccd979bd 1608
e9d578a8 1609 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
ccd979bd
MF		 1610
1611 status = ocfs2_init_slot_info(osb);
1612 if (status < 0) {
1613 mlog_errno(status);
1614 goto bail;
1615 }
1616
ccd979bd
MF		 1617bail:
1618 mlog_exit(status);
1619 return status;
1620}
1621
1622/*
1623 * will return: -EAGAIN if it is ok to keep searching for superblocks
1624 * -EINVAL if there is a bad superblock
1625 * 0 on success
1626 */
1627static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1628 struct buffer_head *bh,
1629 u32 blksz)
1630{
1631 int status = -EAGAIN;
1632
1633 mlog_entry_void();
1634
1635 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1636 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1637 status = -EINVAL;
1638 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1639 mlog(ML_ERROR, "found superblock with incorrect block "
1640 "size: found %u, should be %u\n",
1641 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1642 blksz);
1643 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1644 OCFS2_MAJOR_REV_LEVEL ||
1645 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1646 OCFS2_MINOR_REV_LEVEL) {
1647 mlog(ML_ERROR, "found superblock with bad version: "
1648 "found %u.%u, should be %u.%u\n",
1649 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1650 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1651 OCFS2_MAJOR_REV_LEVEL,
1652 OCFS2_MINOR_REV_LEVEL);
1653 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1654 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 1655 "found %llu, should be %llu\n",
1ca1a111 1656 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 1657 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 1658 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1659 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1660 mlog(ML_ERROR, "bad cluster size found: %u\n",
1661 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1662 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1663 mlog(ML_ERROR, "bad root_blkno: 0\n");
1664 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1665 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1666 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1667 mlog(ML_ERROR,
1668 "Superblock slots found greater than file system "
1669 "maximum: found %u, max %u\n",
1670 le16_to_cpu(di->id2.i_super.s_max_slots),
1671 OCFS2_MAX_SLOTS);
1672 } else {
1673 /* found it! */
1674 status = 0;
1675 }
1676 }
1677
1678 mlog_exit(status);
1679 return status;
1680}
1681
1682static int ocfs2_check_volume(struct ocfs2_super *osb)
1683{
bddb8eb3 1684 int status;
ccd979bd 1685 int dirty;
c271c5c2 1686 int local;
ccd979bd
MF		 1687 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1688 * recover
1689 * ourselves. */
1690
1691 mlog_entry_void();
1692
1693 /* Init our journal object. */
1694 status = ocfs2_journal_init(osb->journal, &dirty);
1695 if (status < 0) {
1696 mlog(ML_ERROR, "Could not initialize journal!\n");
1697 goto finally;
1698 }
1699
1700 /* If the journal was unmounted cleanly then we don't want to
1701 * recover anything. Otherwise, journal_load will do that
1702 * dirty work for us :) */
1703 if (!dirty) {
1704 status = ocfs2_journal_wipe(osb->journal, 0);
1705 if (status < 0) {
1706 mlog_errno(status);
1707 goto finally;
1708 }
1709 } else {
1710 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1711 "recovering volume.\n");
1712 }
1713
c271c5c2
SM		 1714 local = ocfs2_mount_local(osb);
1715
ccd979bd 1716 /* will play back anything left in the journal. */
539d8264 1717 status = ocfs2_journal_load(osb->journal, local, dirty);
01af4820
WW		 1718 if (status < 0) {
1719 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
1720 goto finally;
1721 }
ccd979bd
MF		 1722
1723 if (dirty) {
1724 /* recover my local alloc if we didn't unmount cleanly. */
1725 status = ocfs2_begin_local_alloc_recovery(osb,
1726 osb->slot_num,
1727 &local_alloc);
1728 if (status < 0) {
1729 mlog_errno(status);
1730 goto finally;
1731 }
1732 /* we complete the recovery process after we've marked
1733 * ourselves as mounted. */
1734 }
1735
1736 mlog(0, "Journal loaded.\n");
1737
1738 status = ocfs2_load_local_alloc(osb);
1739 if (status < 0) {
1740 mlog_errno(status);
1741 goto finally;
1742 }
1743
1744 if (dirty) {
1745 /* Recovery will be completed after we've mounted the
1746 * rest of the volume. */
1747 osb->dirty = 1;
1748 osb->local_alloc_copy = local_alloc;
1749 local_alloc = NULL;
1750 }
1751
1752 /* go through each journal, trylock it and if you get the
1753 * lock, and it's marked as dirty, set the bit in the recover
1754 * map and launch a recovery thread for it. */
1755 status = ocfs2_mark_dead_nodes(osb);
1756 if (status < 0)
1757 mlog_errno(status);
1758
1759finally:
1760 if (local_alloc)
1761 kfree(local_alloc);
1762
1763 mlog_exit(status);
1764 return status;
1765}
1766
1767/*
1768 * The routine gets called from dismount or close whenever a dismount on
1769 * volume is requested and the osb open count becomes 1.
1770 * It will remove the osb from the global list and also free up all the
1771 * initialized resources and fileobject.
1772 */
1773static void ocfs2_delete_osb(struct ocfs2_super *osb)
1774{
1775 mlog_entry_void();
1776
1777 /* This function assumes that the caller has the main osb resource */
1778
8e8a4603 1779 ocfs2_free_slot_info(osb);
ccd979bd 1780
b4df6ed8 1781 kfree(osb->osb_orphan_wipes);
539d8264 1782 kfree(osb->slot_recovery_generations);
ccd979bd
MF		 1783 /* FIXME
1784 * This belongs in journal shutdown, but because we have to
1785 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1786 * we free it here.
1787 */
1788 kfree(osb->journal);
1789 if (osb->local_alloc_copy)
1790 kfree(osb->local_alloc_copy);
1791 kfree(osb->uuid_str);
1792 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1793 memset(osb, 0, sizeof(struct ocfs2_super));
1794
1795 mlog_exit_void();
1796}
1797
1798/* Put OCFS2 into a readonly state, or (if the user specifies it),
1799 * panic(). We do not support continue-on-error operation. */
1800static void ocfs2_handle_error(struct super_block *sb)
1801{
1802 struct ocfs2_super *osb = OCFS2_SB(sb);
1803
1804 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1805 panic("OCFS2: (device %s): panic forced after error\n",
1806 sb->s_id);
1807
1808 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1809
1810 if (sb->s_flags & MS_RDONLY &&
1811 (ocfs2_is_soft_readonly(osb) ||
1812 ocfs2_is_hard_readonly(osb)))
1813 return;
1814
1815 printk(KERN_CRIT "File system is now read-only due to the potential "
1816 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1817 "system is unmounted.\n");
1818 sb->s_flags |= MS_RDONLY;
1819 ocfs2_set_ro_flag(osb, 0);
1820}
1821
1822static char error_buf[1024];
1823
1824void __ocfs2_error(struct super_block *sb,
1825 const char *function,
1826 const char *fmt, ...)
1827{
1828 va_list args;
1829
1830 va_start(args, fmt);
4a6e617a 1831 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 1832 va_end(args);
1833
1834 /* Not using mlog here because we want to show the actual
1835 * function the error came from. */
1836 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1837 sb->s_id, function, error_buf);
1838
1839 ocfs2_handle_error(sb);
1840}
1841
1842/* Handle critical errors. This is intentionally more drastic than
1843 * ocfs2_handle_error, so we only use for things like journal errors,
1844 * etc. */
1845void __ocfs2_abort(struct super_block* sb,
1846 const char *function,
1847 const char *fmt, ...)
1848{
1849 va_list args;
1850
1851 va_start(args, fmt);
4a6e617a 1852 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 1853 va_end(args);
1854
1855 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1856 sb->s_id, function, error_buf);
1857
1858 /* We don't have the cluster support yet to go straight to
1859 * hard readonly in here. Until then, we want to keep
1860 * ocfs2_abort() so that we can at least mark critical
1861 * errors.
1862 *
1863 * TODO: This should abort the journal and alert other nodes
1864 * that our slot needs recovery. */
1865
1866 /* Force a panic(). This stinks, but it's better than letting
1867 * things continue without having a proper hard readonly
1868 * here. */
1869 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1870 ocfs2_handle_error(sb);
1871}
1872
1873module_init(ocfs2_init);
1874module_exit(ocfs2_exit);
Linux kernel - Deliverables
This page took 0.538137 seconds and 5 git commands to generate.