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[PATCH 1/2] ocfs2: add flock lock type
[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>
ccd979bd
MF		 43
44#include <cluster/nodemanager.h>
45
46#define MLOG_MASK_PREFIX ML_SUPER
47#include <cluster/masklog.h>
48
49#include "ocfs2.h"
50
51/* this should be the only file to include a version 1 header */
52#include "ocfs1_fs_compat.h"
53
54#include "alloc.h"
55#include "dlmglue.h"
56#include "export.h"
57#include "extent_map.h"
58#include "heartbeat.h"
59#include "inode.h"
60#include "journal.h"
61#include "localalloc.h"
62#include "namei.h"
63#include "slot_map.h"
64#include "super.h"
65#include "sysfile.h"
66#include "uptodate.h"
67#include "ver.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;
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_fill_local_node_info(struct ocfs2_super *osb);
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,
ccd979bd
MF		 156 Opt_err,
157};
158
159static match_table_t tokens = {
160 {Opt_barrier, "barrier=%u"},
161 {Opt_err_panic, "errors=panic"},
162 {Opt_err_ro, "errors=remount-ro"},
163 {Opt_intr, "intr"},
164 {Opt_nointr, "nointr"},
165 {Opt_hb_none, OCFS2_HB_NONE},
166 {Opt_hb_local, OCFS2_HB_LOCAL},
167 {Opt_data_ordered, "data=ordered"},
168 {Opt_data_writeback, "data=writeback"},
7f1a37e3 169 {Opt_atime_quantum, "atime_quantum=%u"},
baf4661a 170 {Opt_slot, "preferred_slot=%u"},
d147b3d6 171 {Opt_commit, "commit=%u"},
2fbe8d1e 172 {Opt_localalloc, "localalloc=%d"},
ccd979bd
MF		 173 {Opt_err, NULL}
174};
175
176/*
177 * write_super and sync_fs ripped right out of ext3.
178 */
179static void ocfs2_write_super(struct super_block *sb)
180{
7892f2f4 181 if (mutex_trylock(&sb->s_lock) != 0)
ccd979bd
MF		 182 BUG();
183 sb->s_dirt = 0;
184}
185
186static int ocfs2_sync_fs(struct super_block *sb, int wait)
187{
bddb8eb3 188 int status;
ccd979bd
MF		 189 tid_t target;
190 struct ocfs2_super *osb = OCFS2_SB(sb);
191
192 sb->s_dirt = 0;
193
194 if (ocfs2_is_hard_readonly(osb))
195 return -EROFS;
196
197 if (wait) {
198 status = ocfs2_flush_truncate_log(osb);
199 if (status < 0)
200 mlog_errno(status);
201 } else {
202 ocfs2_schedule_truncate_log_flush(osb, 0);
203 }
204
205 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
206 if (wait)
207 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
208 target);
209 }
210 return 0;
211}
212
213static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
214{
215 struct inode *new = NULL;
216 int status = 0;
217 int i;
218
219 mlog_entry_void();
220
24c19ef4 221 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE);
ccd979bd
MF		 222 if (IS_ERR(new)) {
223 status = PTR_ERR(new);
224 mlog_errno(status);
225 goto bail;
226 }
227 osb->root_inode = new;
228
24c19ef4 229 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE);
ccd979bd
MF		 230 if (IS_ERR(new)) {
231 status = PTR_ERR(new);
232 mlog_errno(status);
233 goto bail;
234 }
235 osb->sys_root_inode = new;
236
237 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
238 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
239 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
240 if (!new) {
241 ocfs2_release_system_inodes(osb);
242 status = -EINVAL;
243 mlog_errno(status);
244 /* FIXME: Should ERROR_RO_FS */
245 mlog(ML_ERROR, "Unable to load system inode %d, "
246 "possibly corrupt fs?", i);
247 goto bail;
248 }
249 // the array now has one ref, so drop this one
250 iput(new);
251 }
252
253bail:
254 mlog_exit(status);
255 return status;
256}
257
258static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
259{
260 struct inode *new = NULL;
261 int status = 0;
262 int i;
263
264 mlog_entry_void();
265
266 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
267 i < NUM_SYSTEM_INODES;
268 i++) {
269 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
270 if (!new) {
271 ocfs2_release_system_inodes(osb);
272 status = -EINVAL;
273 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
274 status, i, osb->slot_num);
275 goto bail;
276 }
277 /* the array now has one ref, so drop this one */
278 iput(new);
279 }
280
281bail:
282 mlog_exit(status);
283 return status;
284}
285
bddb8eb3 286static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
ccd979bd 287{
bddb8eb3 288 int i;
ccd979bd
MF		 289 struct inode *inode;
290
291 mlog_entry_void();
292
293 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
294 inode = osb->system_inodes[i];
295 if (inode) {
296 iput(inode);
297 osb->system_inodes[i] = NULL;
298 }
299 }
300
301 inode = osb->sys_root_inode;
302 if (inode) {
303 iput(inode);
304 osb->sys_root_inode = NULL;
305 }
306
307 inode = osb->root_inode;
308 if (inode) {
309 iput(inode);
310 osb->root_inode = NULL;
311 }
312
bddb8eb3 313 mlog_exit(0);
ccd979bd
MF		 314}
315
316/* We're allocating fs objects, use GFP_NOFS */
317static struct inode *ocfs2_alloc_inode(struct super_block *sb)
318{
319 struct ocfs2_inode_info *oi;
320
e6b4f8da 321 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
ccd979bd
MF		 322 if (!oi)
323 return NULL;
324
325 return &oi->vfs_inode;
326}
327
328static void ocfs2_destroy_inode(struct inode *inode)
329{
330 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
331}
332
5a254031
MF		 333static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
334 unsigned int cbits)
ccd979bd 335{
5a254031
MF		 336 unsigned int bytes = 1 << cbits;
337 unsigned int trim = bytes;
338 unsigned int bitshift = 32;
339
340 /*
341 * i_size and all block offsets in ocfs2 are always 64 bits
342 * wide. i_clusters is 32 bits, in cluster-sized units. So on
343 * 64 bit platforms, cluster size will be the limiting factor.
ccd979bd
MF		 344 */
345
346#if BITS_PER_LONG == 32
347# if defined(CONFIG_LBD)
2ecd05ae 348 BUILD_BUG_ON(sizeof(sector_t) != 8);
5a254031
MF		 349 /*
350 * We might be limited by page cache size.
351 */
352 if (bytes > PAGE_CACHE_SIZE) {
353 bytes = PAGE_CACHE_SIZE;
354 trim = 1;
355 /*
356 * Shift by 31 here so that we don't get larger than
357 * MAX_LFS_FILESIZE
358 */
359 bitshift = 31;
360 }
ccd979bd 361# else
5a254031
MF		 362 /*
363 * We are limited by the size of sector_t. Use block size, as
364 * that's what we expose to the VFS.
365 */
366 bytes = 1 << bbits;
367 trim = 1;
368 bitshift = 31;
ccd979bd
MF		 369# endif
370#endif
371
5a254031
MF		 372 /*
373 * Trim by a whole cluster when we can actually approach the
374 * on-disk limits. Otherwise we can overflow i_clusters when
375 * an extent start is at the max offset.
376 */
377 return (((unsigned long long)bytes) << bitshift) - trim;
ccd979bd
MF		 378}
379
380static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
381{
382 int incompat_features;
383 int ret = 0;
c0123ade 384 struct mount_options parsed_options;
ccd979bd
MF		 385 struct ocfs2_super *osb = OCFS2_SB(sb);
386
c0123ade 387 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
ccd979bd
MF		 388 ret = -EINVAL;
389 goto out;
390 }
391
392 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
c0123ade 393 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
ccd979bd
MF		 394 ret = -EINVAL;
395 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
396 goto out;
397 }
398
399 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
c0123ade 400 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ccd979bd
MF		 401 ret = -EINVAL;
402 mlog(ML_ERROR, "Cannot change data mode on remount\n");
403 goto out;
404 }
405
406 /* We're going to/from readonly mode. */
407 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
408 /* Lock here so the check of HARD_RO and the potential
409 * setting of SOFT_RO is atomic. */
410 spin_lock(&osb->osb_lock);
411 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
412 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
413 ret = -EROFS;
414 goto unlock_osb;
415 }
416
417 if (*flags & MS_RDONLY) {
418 mlog(0, "Going to ro mode.\n");
419 sb->s_flags |= MS_RDONLY;
420 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
421 } else {
422 mlog(0, "Making ro filesystem writeable.\n");
423
424 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
425 mlog(ML_ERROR, "Cannot remount RDWR "
426 "filesystem due to previous errors.\n");
427 ret = -EROFS;
428 goto unlock_osb;
429 }
430 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
431 if (incompat_features) {
432 mlog(ML_ERROR, "Cannot remount RDWR because "
433 "of unsupported optional features "
434 "(%x).\n", incompat_features);
435 ret = -EINVAL;
436 goto unlock_osb;
437 }
438 sb->s_flags &= ~MS_RDONLY;
439 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
440 }
441unlock_osb:
442 spin_unlock(&osb->osb_lock);
443 }
444
445 if (!ret) {
ccd979bd
MF		 446 /* Only save off the new mount options in case of a successful
447 * remount. */
c0123ade
TY		 448 osb->s_mount_opt = parsed_options.mount_opt;
449 osb->s_atime_quantum = parsed_options.atime_quantum;
450 osb->preferred_slot = parsed_options.slot;
d147b3d6
MF		 451 if (parsed_options.commit_interval)
452 osb->osb_commit_interval = parsed_options.commit_interval;
e001e796
MF		 453
454 if (!ocfs2_is_hard_readonly(osb))
455 ocfs2_set_journal_params(osb);
ccd979bd
MF		 456 }
457out:
458 return ret;
459}
460
461static int ocfs2_sb_probe(struct super_block *sb,
462 struct buffer_head **bh,
463 int *sector_size)
464{
bddb8eb3 465 int status, tmpstat;
ccd979bd
MF		 466 struct ocfs1_vol_disk_hdr *hdr;
467 struct ocfs2_dinode *di;
468 int blksize;
469
470 *bh = NULL;
471
472 /* may be > 512 */
473 *sector_size = bdev_hardsect_size(sb->s_bdev);
474 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
475 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
476 *sector_size, OCFS2_MAX_BLOCKSIZE);
477 status = -EINVAL;
478 goto bail;
479 }
480
481 /* Can this really happen? */
482 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
483 *sector_size = OCFS2_MIN_BLOCKSIZE;
484
485 /* check block zero for old format */
486 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
487 if (status < 0) {
488 mlog_errno(status);
489 goto bail;
490 }
491 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
492 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
493 mlog(ML_ERROR, "incompatible version: %u.%u\n",
494 hdr->major_version, hdr->minor_version);
495 status = -EINVAL;
496 }
497 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
498 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
499 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
500 hdr->signature);
501 status = -EINVAL;
502 }
503 brelse(*bh);
504 *bh = NULL;
505 if (status < 0) {
506 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
507 "upgraded before mounting with ocfs v2\n");
508 goto bail;
509 }
510
511 /*
512 * Now check at magic offset for 512, 1024, 2048, 4096
513 * blocksizes. 4096 is the maximum blocksize because it is
514 * the minimum clustersize.
515 */
516 status = -EINVAL;
517 for (blksize = *sector_size;
518 blksize <= OCFS2_MAX_BLOCKSIZE;
519 blksize <<= 1) {
520 tmpstat = ocfs2_get_sector(sb, bh,
521 OCFS2_SUPER_BLOCK_BLKNO,
522 blksize);
523 if (tmpstat < 0) {
524 status = tmpstat;
525 mlog_errno(status);
526 goto bail;
527 }
528 di = (struct ocfs2_dinode *) (*bh)->b_data;
529 status = ocfs2_verify_volume(di, *bh, blksize);
530 if (status >= 0)
531 goto bail;
532 brelse(*bh);
533 *bh = NULL;
534 if (status != -EAGAIN)
535 break;
536 }
537
538bail:
539 return status;
540}
541
c271c5c2
SM		 542static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
543{
544 if (ocfs2_mount_local(osb)) {
545 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
546 mlog(ML_ERROR, "Cannot heartbeat on a locally "
547 "mounted device.\n");
548 return -EINVAL;
549 }
550 }
551
552 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
553 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb)) {
554 mlog(ML_ERROR, "Heartbeat has to be started to mount "
555 "a read-write clustered device.\n");
556 return -EINVAL;
557 }
558 }
559
560 return 0;
561}
562
ccd979bd
MF		 563static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
564{
565 struct dentry *root;
566 int status, sector_size;
c0123ade 567 struct mount_options parsed_options;
ccd979bd
MF		 568 struct inode *inode = NULL;
569 struct ocfs2_super *osb = NULL;
570 struct buffer_head *bh = NULL;
c271c5c2 571 char nodestr[8];
ccd979bd
MF		 572
573 mlog_entry("%p, %p, %i", sb, data, silent);
574
c0123ade 575 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
ccd979bd
MF		 576 status = -EINVAL;
577 goto read_super_error;
578 }
579
c271c5c2
SM		 580 /* for now we only have one cluster/node, make sure we see it
581 * in the heartbeat universe */
c0123ade 582 if (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL) {
c271c5c2
SM		 583 if (!o2hb_check_local_node_heartbeating()) {
584 status = -EINVAL;
585 goto read_super_error;
586 }
587 }
588
ccd979bd
MF		 589 /* probe for superblock */
590 status = ocfs2_sb_probe(sb, &bh, &sector_size);
591 if (status < 0) {
592 mlog(ML_ERROR, "superblock probe failed!\n");
593 goto read_super_error;
594 }
595
596 status = ocfs2_initialize_super(sb, bh, sector_size);
597 osb = OCFS2_SB(sb);
598 if (status < 0) {
599 mlog_errno(status);
600 goto read_super_error;
601 }
602 brelse(bh);
603 bh = NULL;
c0123ade
TY		 604 osb->s_mount_opt = parsed_options.mount_opt;
605 osb->s_atime_quantum = parsed_options.atime_quantum;
606 osb->preferred_slot = parsed_options.slot;
d147b3d6 607 osb->osb_commit_interval = parsed_options.commit_interval;
2fbe8d1e 608 osb->local_alloc_size = parsed_options.localalloc_opt;
ccd979bd
MF		 609
610 sb->s_magic = OCFS2_SUPER_MAGIC;
611
612 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
613 * heartbeat=none */
614 if (bdev_read_only(sb->s_bdev)) {
615 if (!(sb->s_flags & MS_RDONLY)) {
616 status = -EACCES;
617 mlog(ML_ERROR, "Readonly device detected but readonly "
618 "mount was not specified.\n");
619 goto read_super_error;
620 }
621
622 /* You should not be able to start a local heartbeat
623 * on a readonly device. */
624 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
625 status = -EROFS;
626 mlog(ML_ERROR, "Local heartbeat specified on readonly "
627 "device.\n");
628 goto read_super_error;
629 }
630
631 status = ocfs2_check_journals_nolocks(osb);
632 if (status < 0) {
633 if (status == -EROFS)
634 mlog(ML_ERROR, "Recovery required on readonly "
635 "file system, but write access is "
636 "unavailable.\n");
637 else
638 mlog_errno(status);
639 goto read_super_error;
640 }
641
642 ocfs2_set_ro_flag(osb, 1);
643
644 printk(KERN_NOTICE "Readonly device detected. No cluster "
645 "services will be utilized for this mount. Recovery "
646 "will be skipped.\n");
647 }
648
649 if (!ocfs2_is_hard_readonly(osb)) {
ccd979bd
MF		 650 if (sb->s_flags & MS_RDONLY)
651 ocfs2_set_ro_flag(osb, 0);
652 }
653
c271c5c2
SM		 654 status = ocfs2_verify_heartbeat(osb);
655 if (status < 0) {
656 mlog_errno(status);
657 goto read_super_error;
658 }
659
ccd979bd
MF		 660 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
661 ocfs2_debugfs_root);
662 if (!osb->osb_debug_root) {
663 status = -EINVAL;
664 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
665 goto read_super_error;
666 }
667
668 status = ocfs2_mount_volume(sb);
669 if (osb->root_inode)
670 inode = igrab(osb->root_inode);
671
672 if (status < 0)
673 goto read_super_error;
674
675 if (!inode) {
676 status = -EIO;
677 mlog_errno(status);
678 goto read_super_error;
679 }
680
681 root = d_alloc_root(inode);
682 if (!root) {
683 status = -ENOMEM;
684 mlog_errno(status);
685 goto read_super_error;
686 }
687
688 sb->s_root = root;
689
690 ocfs2_complete_mount_recovery(osb);
691
c271c5c2
SM		 692 if (ocfs2_mount_local(osb))
693 snprintf(nodestr, sizeof(nodestr), "local");
694 else
695 snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num);
696
697 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
781ee3e2 698 "with %s data mode.\n",
c271c5c2 699 osb->dev_str, nodestr, osb->slot_num,
ccd979bd
MF		 700 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
701 "ordered");
702
703 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
704 wake_up(&osb->osb_mount_event);
705
706 mlog_exit(status);
707 return status;
708
709read_super_error:
710 if (bh != NULL)
711 brelse(bh);
712
713 if (inode)
714 iput(inode);
715
716 if (osb) {
717 atomic_set(&osb->vol_state, VOLUME_DISABLED);
718 wake_up(&osb->osb_mount_event);
719 ocfs2_dismount_volume(sb, 1);
720 }
721
722 mlog_exit(status);
723 return status;
724}
725
454e2398
DH		 726static int ocfs2_get_sb(struct file_system_type *fs_type,
727 int flags,
728 const char *dev_name,
729 void *data,
730 struct vfsmount *mnt)
ccd979bd 731{
454e2398
DH		 732 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
733 mnt);
ccd979bd
MF		 734}
735
736static struct file_system_type ocfs2_fs_type = {
737 .owner = THIS_MODULE,
738 .name = "ocfs2",
739 .get_sb = ocfs2_get_sb, /* is this called when we mount
740 * the fs? */
741 .kill_sb = kill_block_super, /* set to the generic one
742 * right now, but do we
743 * need to change that? */
1ba9da2f 744 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
ccd979bd
MF		 745 .next = NULL
746};
747
748static int ocfs2_parse_options(struct super_block *sb,
749 char *options,
c0123ade 750 struct mount_options *mopt,
ccd979bd
MF		 751 int is_remount)
752{
753 int status;
754 char *p;
755
756 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
757 options ? options : "(none)");
758
d147b3d6 759 mopt->commit_interval = 0;
c0123ade
TY		 760 mopt->mount_opt = 0;
761 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
762 mopt->slot = OCFS2_INVALID_SLOT;
2fbe8d1e 763 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
ccd979bd
MF		 764
765 if (!options) {
766 status = 1;
767 goto bail;
768 }
769
770 while ((p = strsep(&options, ",")) != NULL) {
771 int token, option;
772 substring_t args[MAX_OPT_ARGS];
773
774 if (!*p)
775 continue;
776
777 token = match_token(p, tokens, args);
778 switch (token) {
779 case Opt_hb_local:
c0123ade 780 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 781 break;
782 case Opt_hb_none:
c0123ade 783 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
ccd979bd
MF		 784 break;
785 case Opt_barrier:
786 if (match_int(&args[0], &option)) {
787 status = 0;
788 goto bail;
789 }
790 if (option)
c0123ade 791 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
ccd979bd 792 else
c0123ade 793 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
ccd979bd
MF		 794 break;
795 case Opt_intr:
c0123ade 796 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 797 break;
798 case Opt_nointr:
c0123ade 799 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
ccd979bd
MF		 800 break;
801 case Opt_err_panic:
c0123ade 802 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 803 break;
804 case Opt_err_ro:
c0123ade 805 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
ccd979bd
MF		 806 break;
807 case Opt_data_ordered:
c0123ade 808 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd
MF		 809 break;
810 case Opt_data_writeback:
c0123ade 811 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
ccd979bd 812 break;
7f1a37e3
TY		 813 case Opt_atime_quantum:
814 if (match_int(&args[0], &option)) {
815 status = 0;
816 goto bail;
817 }
818 if (option >= 0)
c0123ade 819 mopt->atime_quantum = option;
7f1a37e3 820 break;
baf4661a
SM		 821 case Opt_slot:
822 option = 0;
823 if (match_int(&args[0], &option)) {
824 status = 0;
825 goto bail;
826 }
827 if (option)
c0123ade 828 mopt->slot = (s16)option;
baf4661a 829 break;
d147b3d6
MF		 830 case Opt_commit:
831 option = 0;
832 if (match_int(&args[0], &option)) {
833 status = 0;
834 goto bail;
835 }
836 if (option < 0)
837 return 0;
838 if (option == 0)
839 option = JBD_DEFAULT_MAX_COMMIT_AGE;
840 mopt->commit_interval = HZ * option;
841 break;
2fbe8d1e
SM		 842 case Opt_localalloc:
843 option = 0;
844 if (match_int(&args[0], &option)) {
845 status = 0;
846 goto bail;
847 }
848 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
849 mopt->localalloc_opt = option;
850 break;
ccd979bd
MF		 851 default:
852 mlog(ML_ERROR,
853 "Unrecognized mount option \"%s\" "
854 "or missing value\n", p);
855 status = 0;
856 goto bail;
857 }
858 }
859
860 status = 1;
861
862bail:
863 mlog_exit(status);
864 return status;
865}
866
d550071c
SM		 867static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
868{
869 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
870 unsigned long opts = osb->s_mount_opt;
871
872 if (opts & OCFS2_MOUNT_HB_LOCAL)
873 seq_printf(s, ",_netdev,heartbeat=local");
874 else
875 seq_printf(s, ",heartbeat=none");
876
877 if (opts & OCFS2_MOUNT_NOINTR)
878 seq_printf(s, ",nointr");
879
880 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
881 seq_printf(s, ",data=writeback");
882 else
883 seq_printf(s, ",data=ordered");
884
885 if (opts & OCFS2_MOUNT_BARRIER)
886 seq_printf(s, ",barrier=1");
887
888 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
889 seq_printf(s, ",errors=panic");
890 else
891 seq_printf(s, ",errors=remount-ro");
892
893 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
894 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
895
896 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
897 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
898
d147b3d6
MF		 899 if (osb->osb_commit_interval)
900 seq_printf(s, ",commit=%u",
901 (unsigned) (osb->osb_commit_interval / HZ));
902
2fbe8d1e
SM		 903 if (osb->local_alloc_size != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
904 seq_printf(s, ",localalloc=%d", osb->local_alloc_size);
905
d550071c
SM		 906 return 0;
907}
908
ccd979bd
MF		 909static int __init ocfs2_init(void)
910{
911 int status;
912
913 mlog_entry_void();
914
915 ocfs2_print_version();
916
ccd979bd
MF		 917 status = init_ocfs2_uptodate_cache();
918 if (status < 0) {
919 mlog_errno(status);
920 goto leave;
921 }
922
923 status = ocfs2_initialize_mem_caches();
924 if (status < 0) {
925 mlog_errno(status);
926 goto leave;
927 }
928
929 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
930 if (!ocfs2_wq) {
931 status = -ENOMEM;
932 goto leave;
933 }
934
ccd979bd
MF		 935 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
936 if (!ocfs2_debugfs_root) {
937 status = -EFAULT;
938 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
939 }
940
941leave:
942 if (status < 0) {
943 ocfs2_free_mem_caches();
944 exit_ocfs2_uptodate_cache();
ccd979bd
MF		 945 }
946
947 mlog_exit(status);
948
949 if (status >= 0) {
950 return register_filesystem(&ocfs2_fs_type);
951 } else
952 return -1;
953}
954
955static void __exit ocfs2_exit(void)
956{
957 mlog_entry_void();
958
959 if (ocfs2_wq) {
960 flush_workqueue(ocfs2_wq);
961 destroy_workqueue(ocfs2_wq);
962 }
963
964 debugfs_remove(ocfs2_debugfs_root);
965
966 ocfs2_free_mem_caches();
967
968 unregister_filesystem(&ocfs2_fs_type);
969
ccd979bd
MF		 970 exit_ocfs2_uptodate_cache();
971
972 mlog_exit_void();
973}
974
975static void ocfs2_put_super(struct super_block *sb)
976{
977 mlog_entry("(0x%p)\n", sb);
978
979 ocfs2_sync_blockdev(sb);
980 ocfs2_dismount_volume(sb, 0);
981
982 mlog_exit_void();
983}
984
726c3342 985static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
ccd979bd
MF		 986{
987 struct ocfs2_super *osb;
988 u32 numbits, freebits;
989 int status;
990 struct ocfs2_dinode *bm_lock;
991 struct buffer_head *bh = NULL;
992 struct inode *inode = NULL;
993
726c3342 994 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
ccd979bd 995
726c3342 996 osb = OCFS2_SB(dentry->d_sb);
ccd979bd
MF		 997
998 inode = ocfs2_get_system_file_inode(osb,
999 GLOBAL_BITMAP_SYSTEM_INODE,
1000 OCFS2_INVALID_SLOT);
1001 if (!inode) {
1002 mlog(ML_ERROR, "failed to get bitmap inode\n");
1003 status = -EIO;
1004 goto bail;
1005 }
1006
e63aecb6 1007 status = ocfs2_inode_lock(inode, &bh, 0);
ccd979bd
MF		 1008 if (status < 0) {
1009 mlog_errno(status);
1010 goto bail;
1011 }
1012
1013 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1014
1015 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1016 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1017
1018 buf->f_type = OCFS2_SUPER_MAGIC;
726c3342 1019 buf->f_bsize = dentry->d_sb->s_blocksize;
ccd979bd
MF		 1020 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1021 buf->f_blocks = ((sector_t) numbits) *
1022 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1023 buf->f_bfree = ((sector_t) freebits) *
1024 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1025 buf->f_bavail = buf->f_bfree;
1026 buf->f_files = numbits;
1027 buf->f_ffree = freebits;
1028
1029 brelse(bh);
1030
e63aecb6 1031 ocfs2_inode_unlock(inode, 0);
ccd979bd
MF		 1032 status = 0;
1033bail:
1034 if (inode)
1035 iput(inode);
1036
1037 mlog_exit(status);
1038
1039 return status;
1040}
1041
4ba9b9d0 1042static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data)
ccd979bd
MF		 1043{
1044 struct ocfs2_inode_info *oi = data;
1045
a35afb83
CL		 1046 oi->ip_flags = 0;
1047 oi->ip_open_count = 0;
1048 spin_lock_init(&oi->ip_lock);
1049 ocfs2_extent_map_init(&oi->vfs_inode);
1050 INIT_LIST_HEAD(&oi->ip_io_markers);
1051 oi->ip_created_trans = 0;
1052 oi->ip_last_trans = 0;
1053 oi->ip_dir_start_lookup = 0;
ccd979bd 1054
a35afb83
CL		 1055 init_rwsem(&oi->ip_alloc_sem);
1056 mutex_init(&oi->ip_io_mutex);
ccd979bd 1057
a35afb83
CL		 1058 oi->ip_blkno = 0ULL;
1059 oi->ip_clusters = 0;
ccd979bd 1060
a35afb83 1061 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
e63aecb6 1062 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
a35afb83 1063 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
ccd979bd 1064
a35afb83 1065 ocfs2_metadata_cache_init(&oi->vfs_inode);
ccd979bd 1066
a35afb83 1067 inode_init_once(&oi->vfs_inode);
ccd979bd
MF		 1068}
1069
1070static int ocfs2_initialize_mem_caches(void)
1071{
1072 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
fffb60f9
PJ		 1073 sizeof(struct ocfs2_inode_info),
1074 0,
1075 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1076 SLAB_MEM_SPREAD),
20c2df83 1077 ocfs2_inode_init_once);
ccd979bd
MF		 1078 if (!ocfs2_inode_cachep)
1079 return -ENOMEM;
1080
ccd979bd
MF		 1081 return 0;
1082}
1083
1084static void ocfs2_free_mem_caches(void)
1085{
1086 if (ocfs2_inode_cachep)
1087 kmem_cache_destroy(ocfs2_inode_cachep);
ccd979bd
MF		 1088
1089 ocfs2_inode_cachep = NULL;
ccd979bd
MF		 1090}
1091
1092static int ocfs2_get_sector(struct super_block *sb,
1093 struct buffer_head **bh,
1094 int block,
1095 int sect_size)
1096{
1097 if (!sb_set_blocksize(sb, sect_size)) {
1098 mlog(ML_ERROR, "unable to set blocksize\n");
1099 return -EIO;
1100 }
1101
1102 *bh = sb_getblk(sb, block);
1103 if (!*bh) {
1104 mlog_errno(-EIO);
1105 return -EIO;
1106 }
1107 lock_buffer(*bh);
1108 if (!buffer_dirty(*bh))
1109 clear_buffer_uptodate(*bh);
1110 unlock_buffer(*bh);
1111 ll_rw_block(READ, 1, bh);
1112 wait_on_buffer(*bh);
1113 return 0;
1114}
1115
1116/* ocfs2 1.0 only allows one cluster and node identity per kernel image. */
1117static int ocfs2_fill_local_node_info(struct ocfs2_super *osb)
1118{
1119 int status;
1120
1121 /* XXX hold a ref on the node while mounte? easy enough, if
1122 * desirable. */
c271c5c2
SM		 1123 if (ocfs2_mount_local(osb))
1124 osb->node_num = 0;
1125 else
1126 osb->node_num = o2nm_this_node();
1127
ccd979bd
MF		 1128 if (osb->node_num == O2NM_MAX_NODES) {
1129 mlog(ML_ERROR, "could not find this host's node number\n");
1130 status = -ENOENT;
1131 goto bail;
1132 }
1133
781ee3e2 1134 mlog(0, "I am node %d\n", osb->node_num);
ccd979bd
MF		 1135
1136 status = 0;
1137bail:
1138 return status;
1139}
1140
1141static int ocfs2_mount_volume(struct super_block *sb)
1142{
1143 int status = 0;
1144 int unlock_super = 0;
1145 struct ocfs2_super *osb = OCFS2_SB(sb);
1146
1147 mlog_entry_void();
1148
1149 if (ocfs2_is_hard_readonly(osb))
1150 goto leave;
1151
1152 status = ocfs2_fill_local_node_info(osb);
1153 if (status < 0) {
1154 mlog_errno(status);
1155 goto leave;
1156 }
1157
ccd979bd
MF		 1158 status = ocfs2_dlm_init(osb);
1159 if (status < 0) {
1160 mlog_errno(status);
1161 goto leave;
1162 }
1163
ccd979bd
MF		 1164 status = ocfs2_super_lock(osb, 1);
1165 if (status < 0) {
1166 mlog_errno(status);
1167 goto leave;
1168 }
1169 unlock_super = 1;
1170
1171 /* This will load up the node map and add ourselves to it. */
1172 status = ocfs2_find_slot(osb);
1173 if (status < 0) {
1174 mlog_errno(status);
1175 goto leave;
1176 }
1177
ccd979bd
MF		 1178 /* load all node-local system inodes */
1179 status = ocfs2_init_local_system_inodes(osb);
1180 if (status < 0) {
1181 mlog_errno(status);
1182 goto leave;
1183 }
1184
1185 status = ocfs2_check_volume(osb);
1186 if (status < 0) {
1187 mlog_errno(status);
1188 goto leave;
1189 }
1190
1191 status = ocfs2_truncate_log_init(osb);
1192 if (status < 0) {
1193 mlog_errno(status);
1194 goto leave;
1195 }
1196
c271c5c2
SM		 1197 if (ocfs2_mount_local(osb))
1198 goto leave;
1199
ccd979bd
MF		 1200leave:
1201 if (unlock_super)
1202 ocfs2_super_unlock(osb, 1);
1203
1204 mlog_exit(status);
1205 return status;
1206}
1207
1208/* we can't grab the goofy sem lock from inside wait_event, so we use
1209 * memory barriers to make sure that we'll see the null task before
1210 * being woken up */
1211static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
1212{
1213 mb();
1214 return osb->recovery_thread_task != NULL;
1215}
1216
1217static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1218{
1219 int tmp;
1220 struct ocfs2_super *osb = NULL;
c271c5c2 1221 char nodestr[8];
ccd979bd
MF		 1222
1223 mlog_entry("(0x%p)\n", sb);
1224
1225 BUG_ON(!sb);
1226 osb = OCFS2_SB(sb);
1227 BUG_ON(!osb);
1228
1229 ocfs2_shutdown_local_alloc(osb);
1230
1231 ocfs2_truncate_log_shutdown(osb);
1232
1233 /* disable any new recovery threads and wait for any currently
1234 * running ones to exit. Do this before setting the vol_state. */
c74ec2f7 1235 mutex_lock(&osb->recovery_lock);
ccd979bd 1236 osb->disable_recovery = 1;
c74ec2f7 1237 mutex_unlock(&osb->recovery_lock);
ccd979bd
MF		 1238 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
1239
1240 /* At this point, we know that no more recovery threads can be
1241 * launched, so wait for any recovery completion work to
1242 * complete. */
1243 flush_workqueue(ocfs2_wq);
1244
1245 ocfs2_journal_shutdown(osb);
1246
1247 ocfs2_sync_blockdev(sb);
1248
1249 /* No dlm means we've failed during mount, so skip all the
1250 * steps which depended on that to complete. */
1251 if (osb->dlm) {
1252 tmp = ocfs2_super_lock(osb, 1);
1253 if (tmp < 0) {
1254 mlog_errno(tmp);
1255 return;
1256 }
19b613d4 1257 }
ccd979bd 1258
19b613d4
MF		 1259 if (osb->slot_num != OCFS2_INVALID_SLOT)
1260 ocfs2_put_slot(osb);
ccd979bd 1261
19b613d4 1262 if (osb->dlm)
ccd979bd 1263 ocfs2_super_unlock(osb, 1);
ccd979bd
MF		 1264
1265 ocfs2_release_system_inodes(osb);
1266
34d024f8 1267 if (osb->dlm)
ccd979bd 1268 ocfs2_dlm_shutdown(osb);
ccd979bd 1269
ccd979bd
MF		 1270 debugfs_remove(osb->osb_debug_root);
1271
1272 if (!mnt_err)
1273 ocfs2_stop_heartbeat(osb);
1274
1275 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1276
c271c5c2
SM		 1277 if (ocfs2_mount_local(osb))
1278 snprintf(nodestr, sizeof(nodestr), "local");
1279 else
1280 snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num);
1281
1282 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1283 osb->dev_str, nodestr);
ccd979bd
MF		 1284
1285 ocfs2_delete_osb(osb);
1286 kfree(osb);
1287 sb->s_dev = 0;
1288 sb->s_fs_info = NULL;
1289}
1290
1291static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1292 unsigned uuid_bytes)
1293{
1294 int i, ret;
1295 char *ptr;
1296
1297 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1298
cd861280 1299 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
ccd979bd
MF		 1300 if (osb->uuid_str == NULL)
1301 return -ENOMEM;
1302
ccd979bd
MF		 1303 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1304 /* print with null */
1305 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1306 if (ret != 2) /* drop super cleans up */
1307 return -EINVAL;
1308 /* then only advance past the last char */
1309 ptr += 2;
1310 }
1311
1312 return 0;
1313}
1314
1315static int ocfs2_initialize_super(struct super_block *sb,
1316 struct buffer_head *bh,
1317 int sector_size)
1318{
bddb8eb3 1319 int status;
5a254031
MF		 1320 int i, cbits, bbits;
1321 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
ccd979bd 1322 struct inode *inode = NULL;
ccd979bd
MF		 1323 struct ocfs2_journal *journal;
1324 __le32 uuid_net_key;
1325 struct ocfs2_super *osb;
1326
1327 mlog_entry_void();
1328
cd861280 1329 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
ccd979bd
MF		 1330 if (!osb) {
1331 status = -ENOMEM;
1332 mlog_errno(status);
1333 goto bail;
1334 }
1335
1336 sb->s_fs_info = osb;
1337 sb->s_op = &ocfs2_sops;
1338 sb->s_export_op = &ocfs2_export_ops;
e0dceaf0 1339 sb->s_time_gran = 1;
ccd979bd
MF		 1340 sb->s_flags |= MS_NOATIME;
1341 /* this is needed to support O_LARGEFILE */
5a254031
MF		 1342 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1343 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1344 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
ccd979bd
MF		 1345
1346 osb->sb = sb;
1347 /* Save off for ocfs2_rw_direct */
1348 osb->s_sectsize_bits = blksize_bits(sector_size);
ebdec83b 1349 BUG_ON(!osb->s_sectsize_bits);
ccd979bd 1350
ccd979bd 1351 init_waitqueue_head(&osb->recovery_event);
34d024f8
MF		 1352 spin_lock_init(&osb->dc_task_lock);
1353 init_waitqueue_head(&osb->dc_event);
1354 osb->dc_work_sequence = 0;
1355 osb->dc_wake_sequence = 0;
ccd979bd
MF		 1356 INIT_LIST_HEAD(&osb->blocked_lock_list);
1357 osb->blocked_lock_count = 0;
ccd979bd
MF		 1358 spin_lock_init(&osb->osb_lock);
1359
1360 atomic_set(&osb->alloc_stats.moves, 0);
1361 atomic_set(&osb->alloc_stats.local_data, 0);
1362 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1363 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1364 atomic_set(&osb->alloc_stats.bg_extends, 0);
1365
1366 ocfs2_init_node_maps(osb);
1367
1368 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1369 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1370
c74ec2f7 1371 mutex_init(&osb->recovery_lock);
ccd979bd
MF		 1372
1373 osb->disable_recovery = 0;
1374 osb->recovery_thread_task = NULL;
1375
1376 init_waitqueue_head(&osb->checkpoint_event);
1377 atomic_set(&osb->needs_checkpoint, 0);
1378
7f1a37e3
TY		 1379 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1380
ccd979bd
MF		 1381 osb->node_num = O2NM_INVALID_NODE_NUM;
1382 osb->slot_num = OCFS2_INVALID_SLOT;
1383
1384 osb->local_alloc_state = OCFS2_LA_UNUSED;
1385 osb->local_alloc_bh = NULL;
1386
1387 ocfs2_setup_hb_callbacks(osb);
1388
1389 init_waitqueue_head(&osb->osb_mount_event);
1390
1391 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1392 if (!osb->vol_label) {
1393 mlog(ML_ERROR, "unable to alloc vol label\n");
1394 status = -ENOMEM;
1395 goto bail;
1396 }
1397
ccd979bd
MF		 1398 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1399 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1400 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1401 osb->max_slots);
1402 status = -EINVAL;
1403 goto bail;
1404 }
781ee3e2 1405 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
ccd979bd 1406
b4df6ed8
MF		 1407 init_waitqueue_head(&osb->osb_wipe_event);
1408 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1409 sizeof(*osb->osb_orphan_wipes),
1410 GFP_KERNEL);
1411 if (!osb->osb_orphan_wipes) {
1412 status = -ENOMEM;
1413 mlog_errno(status);
1414 goto bail;
1415 }
1416
ccd979bd
MF		 1417 osb->s_feature_compat =
1418 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1419 osb->s_feature_ro_compat =
1420 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1421 osb->s_feature_incompat =
1422 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1423
1424 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1425 mlog(ML_ERROR, "couldn't mount because of unsupported "
1426 "optional features (%x).\n", i);
1427 status = -EINVAL;
1428 goto bail;
1429 }
1430 if (!(osb->sb->s_flags & MS_RDONLY) &&
1431 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1432 mlog(ML_ERROR, "couldn't mount RDWR because of "
1433 "unsupported optional features (%x).\n", i);
1434 status = -EINVAL;
1435 goto bail;
1436 }
1437
1438 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1439
1440 /* FIXME
1441 * This should be done in ocfs2_journal_init(), but unknown
1442 * ordering issues will cause the filesystem to crash.
1443 * If anyone wants to figure out what part of the code
1444 * refers to osb->journal before ocfs2_journal_init() is run,
1445 * be my guest.
1446 */
1447 /* initialize our journal structure */
1448
cd861280 1449 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
ccd979bd
MF		 1450 if (!journal) {
1451 mlog(ML_ERROR, "unable to alloc journal\n");
1452 status = -ENOMEM;
1453 goto bail;
1454 }
1455 osb->journal = journal;
1456 journal->j_osb = osb;
1457
1458 atomic_set(&journal->j_num_trans, 0);
1459 init_rwsem(&journal->j_trans_barrier);
1460 init_waitqueue_head(&journal->j_checkpointed);
1461 spin_lock_init(&journal->j_lock);
1462 journal->j_trans_id = (unsigned long) 1;
1463 INIT_LIST_HEAD(&journal->j_la_cleanups);
c4028958 1464 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
ccd979bd
MF		 1465 journal->j_state = OCFS2_JOURNAL_FREE;
1466
1467 /* get some pseudo constants for clustersize bits */
1468 osb->s_clustersize_bits =
1469 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1470 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1471 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1472
1473 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1474 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1475 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1476 osb->s_clustersize);
1477 status = -EINVAL;
1478 goto bail;
1479 }
1480
1481 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1482 > (u32)~0UL) {
1483 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1484 "what jbd can address in 32 bits.\n");
1485 status = -EINVAL;
1486 goto bail;
1487 }
1488
1489 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1490 sizeof(di->id2.i_super.s_uuid))) {
1491 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1492 status = -ENOMEM;
1493 goto bail;
1494 }
1495
78427043 1496 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
ccd979bd
MF		 1497
1498 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1499 osb->vol_label[63] = '\0';
1500 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1501 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1502 osb->first_cluster_group_blkno =
1503 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1504 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1505 mlog(0, "vol_label: %s\n", osb->vol_label);
1506 mlog(0, "uuid: %s\n", osb->uuid_str);
b0697053
MF		 1507 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1508 (unsigned long long)osb->root_blkno,
1509 (unsigned long long)osb->system_dir_blkno);
ccd979bd
MF		 1510
1511 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1512 if (!osb->osb_dlm_debug) {
1513 status = -ENOMEM;
1514 mlog_errno(status);
1515 goto bail;
1516 }
1517
1518 atomic_set(&osb->vol_state, VOLUME_INIT);
1519
1520 /* load root, system_dir, and all global system inodes */
1521 status = ocfs2_init_global_system_inodes(osb);
1522 if (status < 0) {
1523 mlog_errno(status);
1524 goto bail;
1525 }
1526
1527 /*
1528 * global bitmap
1529 */
1530 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1531 OCFS2_INVALID_SLOT);
1532 if (!inode) {
1533 status = -EINVAL;
1534 mlog_errno(status);
1535 goto bail;
1536 }
1537
1538 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
ccd979bd 1539 iput(inode);
ccd979bd 1540
e9d578a8 1541 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
ccd979bd
MF		 1542
1543 status = ocfs2_init_slot_info(osb);
1544 if (status < 0) {
1545 mlog_errno(status);
1546 goto bail;
1547 }
1548
ccd979bd
MF		 1549bail:
1550 mlog_exit(status);
1551 return status;
1552}
1553
1554/*
1555 * will return: -EAGAIN if it is ok to keep searching for superblocks
1556 * -EINVAL if there is a bad superblock
1557 * 0 on success
1558 */
1559static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1560 struct buffer_head *bh,
1561 u32 blksz)
1562{
1563 int status = -EAGAIN;
1564
1565 mlog_entry_void();
1566
1567 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1568 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1569 status = -EINVAL;
1570 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1571 mlog(ML_ERROR, "found superblock with incorrect block "
1572 "size: found %u, should be %u\n",
1573 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1574 blksz);
1575 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1576 OCFS2_MAJOR_REV_LEVEL ||
1577 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1578 OCFS2_MINOR_REV_LEVEL) {
1579 mlog(ML_ERROR, "found superblock with bad version: "
1580 "found %u.%u, should be %u.%u\n",
1581 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1582 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1583 OCFS2_MAJOR_REV_LEVEL,
1584 OCFS2_MINOR_REV_LEVEL);
1585 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1586 mlog(ML_ERROR, "bad block number on superblock: "
b0697053 1587 "found %llu, should be %llu\n",
1ca1a111 1588 (unsigned long long)le64_to_cpu(di->i_blkno),
b0697053 1589 (unsigned long long)bh->b_blocknr);
ccd979bd
MF		 1590 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1591 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1592 mlog(ML_ERROR, "bad cluster size found: %u\n",
1593 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1594 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1595 mlog(ML_ERROR, "bad root_blkno: 0\n");
1596 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1597 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1598 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1599 mlog(ML_ERROR,
1600 "Superblock slots found greater than file system "
1601 "maximum: found %u, max %u\n",
1602 le16_to_cpu(di->id2.i_super.s_max_slots),
1603 OCFS2_MAX_SLOTS);
1604 } else {
1605 /* found it! */
1606 status = 0;
1607 }
1608 }
1609
1610 mlog_exit(status);
1611 return status;
1612}
1613
1614static int ocfs2_check_volume(struct ocfs2_super *osb)
1615{
bddb8eb3 1616 int status;
ccd979bd 1617 int dirty;
c271c5c2 1618 int local;
ccd979bd
MF		 1619 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1620 * recover
1621 * ourselves. */
1622
1623 mlog_entry_void();
1624
1625 /* Init our journal object. */
1626 status = ocfs2_journal_init(osb->journal, &dirty);
1627 if (status < 0) {
1628 mlog(ML_ERROR, "Could not initialize journal!\n");
1629 goto finally;
1630 }
1631
1632 /* If the journal was unmounted cleanly then we don't want to
1633 * recover anything. Otherwise, journal_load will do that
1634 * dirty work for us :) */
1635 if (!dirty) {
1636 status = ocfs2_journal_wipe(osb->journal, 0);
1637 if (status < 0) {
1638 mlog_errno(status);
1639 goto finally;
1640 }
1641 } else {
1642 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1643 "recovering volume.\n");
1644 }
1645
c271c5c2
SM		 1646 local = ocfs2_mount_local(osb);
1647
ccd979bd 1648 /* will play back anything left in the journal. */
c271c5c2 1649 ocfs2_journal_load(osb->journal, local);
ccd979bd
MF		 1650
1651 if (dirty) {
1652 /* recover my local alloc if we didn't unmount cleanly. */
1653 status = ocfs2_begin_local_alloc_recovery(osb,
1654 osb->slot_num,
1655 &local_alloc);
1656 if (status < 0) {
1657 mlog_errno(status);
1658 goto finally;
1659 }
1660 /* we complete the recovery process after we've marked
1661 * ourselves as mounted. */
1662 }
1663
1664 mlog(0, "Journal loaded.\n");
1665
1666 status = ocfs2_load_local_alloc(osb);
1667 if (status < 0) {
1668 mlog_errno(status);
1669 goto finally;
1670 }
1671
1672 if (dirty) {
1673 /* Recovery will be completed after we've mounted the
1674 * rest of the volume. */
1675 osb->dirty = 1;
1676 osb->local_alloc_copy = local_alloc;
1677 local_alloc = NULL;
1678 }
1679
1680 /* go through each journal, trylock it and if you get the
1681 * lock, and it's marked as dirty, set the bit in the recover
1682 * map and launch a recovery thread for it. */
1683 status = ocfs2_mark_dead_nodes(osb);
1684 if (status < 0)
1685 mlog_errno(status);
1686
1687finally:
1688 if (local_alloc)
1689 kfree(local_alloc);
1690
1691 mlog_exit(status);
1692 return status;
1693}
1694
1695/*
1696 * The routine gets called from dismount or close whenever a dismount on
1697 * volume is requested and the osb open count becomes 1.
1698 * It will remove the osb from the global list and also free up all the
1699 * initialized resources and fileobject.
1700 */
1701static void ocfs2_delete_osb(struct ocfs2_super *osb)
1702{
1703 mlog_entry_void();
1704
1705 /* This function assumes that the caller has the main osb resource */
1706
1707 if (osb->slot_info)
1708 ocfs2_free_slot_info(osb->slot_info);
1709
b4df6ed8 1710 kfree(osb->osb_orphan_wipes);
ccd979bd
MF		 1711 /* FIXME
1712 * This belongs in journal shutdown, but because we have to
1713 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1714 * we free it here.
1715 */
1716 kfree(osb->journal);
1717 if (osb->local_alloc_copy)
1718 kfree(osb->local_alloc_copy);
1719 kfree(osb->uuid_str);
1720 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1721 memset(osb, 0, sizeof(struct ocfs2_super));
1722
1723 mlog_exit_void();
1724}
1725
1726/* Put OCFS2 into a readonly state, or (if the user specifies it),
1727 * panic(). We do not support continue-on-error operation. */
1728static void ocfs2_handle_error(struct super_block *sb)
1729{
1730 struct ocfs2_super *osb = OCFS2_SB(sb);
1731
1732 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1733 panic("OCFS2: (device %s): panic forced after error\n",
1734 sb->s_id);
1735
1736 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1737
1738 if (sb->s_flags & MS_RDONLY &&
1739 (ocfs2_is_soft_readonly(osb) ||
1740 ocfs2_is_hard_readonly(osb)))
1741 return;
1742
1743 printk(KERN_CRIT "File system is now read-only due to the potential "
1744 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1745 "system is unmounted.\n");
1746 sb->s_flags |= MS_RDONLY;
1747 ocfs2_set_ro_flag(osb, 0);
1748}
1749
1750static char error_buf[1024];
1751
1752void __ocfs2_error(struct super_block *sb,
1753 const char *function,
1754 const char *fmt, ...)
1755{
1756 va_list args;
1757
1758 va_start(args, fmt);
4a6e617a 1759 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 1760 va_end(args);
1761
1762 /* Not using mlog here because we want to show the actual
1763 * function the error came from. */
1764 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1765 sb->s_id, function, error_buf);
1766
1767 ocfs2_handle_error(sb);
1768}
1769
1770/* Handle critical errors. This is intentionally more drastic than
1771 * ocfs2_handle_error, so we only use for things like journal errors,
1772 * etc. */
1773void __ocfs2_abort(struct super_block* sb,
1774 const char *function,
1775 const char *fmt, ...)
1776{
1777 va_list args;
1778
1779 va_start(args, fmt);
4a6e617a 1780 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
ccd979bd
MF		 1781 va_end(args);
1782
1783 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1784 sb->s_id, function, error_buf);
1785
1786 /* We don't have the cluster support yet to go straight to
1787 * hard readonly in here. Until then, we want to keep
1788 * ocfs2_abort() so that we can at least mark critical
1789 * errors.
1790 *
1791 * TODO: This should abort the journal and alert other nodes
1792 * that our slot needs recovery. */
1793
1794 /* Force a panic(). This stinks, but it's better than letting
1795 * things continue without having a proper hard readonly
1796 * here. */
1797 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1798 ocfs2_handle_error(sb);
1799}
1800
1801module_init(ocfs2_init);
1802module_exit(ocfs2_exit);
Linux kernel - Deliverables
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