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drivers/net/lib8390: fix warning, trim trailing whitespace
[linux-2.6/next.git] / fs / ocfs2 / super.c
blobdf63ba20ae9016d7957930da638b729d9ab242bb
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>
42 #include <linux/mount.h>
43 #include <linux/seq_file.h>
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"
67
68 #include "buffer_head_io.h"
69
70 static struct kmem_cache *ocfs2_inode_cachep = NULL;
71
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. */
76 struct workqueue_struct *ocfs2_wq = NULL;
77
78 static struct dentry *ocfs2_debugfs_root = NULL;
79
80 MODULE_AUTHOR("Oracle");
81 MODULE_LICENSE("GPL");
82
83 struct mount_options
84 {
85 unsigned long commit_interval;
86 unsigned long mount_opt;
87 unsigned int atime_quantum;
88 signed short slot;
89 unsigned int localalloc_opt;
90 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
91 };
92
93 static int ocfs2_parse_options(struct super_block *sb, char *options,
94 struct mount_options *mopt,
95 int is_remount);
96 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
97 static void ocfs2_put_super(struct super_block *sb);
98 static int ocfs2_mount_volume(struct super_block *sb);
99 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
100 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
101 static int ocfs2_initialize_mem_caches(void);
102 static void ocfs2_free_mem_caches(void);
103 static void ocfs2_delete_osb(struct ocfs2_super *osb);
104
105 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
106
107 static int ocfs2_sync_fs(struct super_block *sb, int wait);
108
109 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
110 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
111 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
112 static int ocfs2_check_volume(struct ocfs2_super *osb);
113 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
114 struct buffer_head *bh,
115 u32 sectsize);
116 static int ocfs2_initialize_super(struct super_block *sb,
117 struct buffer_head *bh,
118 int sector_size);
119 static int ocfs2_get_sector(struct super_block *sb,
120 struct buffer_head **bh,
121 int block,
122 int sect_size);
123 static void ocfs2_write_super(struct super_block *sb);
124 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
125 static void ocfs2_destroy_inode(struct inode *inode);
126
127 static const struct super_operations ocfs2_sops = {
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,
138 .show_options = ocfs2_show_options,
139 };
140
141 enum {
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,
151 Opt_atime_quantum,
152 Opt_slot,
153 Opt_commit,
154 Opt_localalloc,
155 Opt_localflocks,
156 Opt_stack,
157 Opt_err,
158 };
159
160 static match_table_t tokens = {
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"},
170 {Opt_atime_quantum, "atime_quantum=%u"},
171 {Opt_slot, "preferred_slot=%u"},
172 {Opt_commit, "commit=%u"},
173 {Opt_localalloc, "localalloc=%d"},
174 {Opt_localflocks, "localflocks"},
175 {Opt_stack, "cluster_stack=%s"},
176 {Opt_err, NULL}
177 };
178
179 /*
180 * write_super and sync_fs ripped right out of ext3.
181 */
182 static void ocfs2_write_super(struct super_block *sb)
183 {
184 if (mutex_trylock(&sb->s_lock) != 0)
185 BUG();
186 sb->s_dirt = 0;
187 }
188
189 static int ocfs2_sync_fs(struct super_block *sb, int wait)
190 {
191 int status;
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
216 static 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
224 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
225 if (IS_ERR(new)) {
226 status = PTR_ERR(new);
227 mlog_errno(status);
228 goto bail;
229 }
230 osb->root_inode = new;
231
232 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
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
256 bail:
257 mlog_exit(status);
258 return status;
259 }
260
261 static 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
284 bail:
285 mlog_exit(status);
286 return status;
287 }
288
289 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
290 {
291 int i;
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
316 mlog_exit(0);
317 }
318
319 /* We're allocating fs objects, use GFP_NOFS */
320 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
321 {
322 struct ocfs2_inode_info *oi;
323
324 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
325 if (!oi)
326 return NULL;
327
328 return &oi->vfs_inode;
329 }
330
331 static void ocfs2_destroy_inode(struct inode *inode)
332 {
333 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
334 }
335
336 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
337 unsigned int cbits)
338 {
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.
347 */
348
349 #if BITS_PER_LONG == 32
350 # if defined(CONFIG_LBD)
351 BUILD_BUG_ON(sizeof(sector_t) != 8);
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 }
364 # else
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;
372 # endif
373 #endif
374
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;
381 }
382
383 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
384 {
385 int incompat_features;
386 int ret = 0;
387 struct mount_options parsed_options;
388 struct ocfs2_super *osb = OCFS2_SB(sb);
389
390 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
391 ret = -EINVAL;
392 goto out;
393 }
394
395 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
396 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
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) !=
403 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
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 }
444 unlock_osb:
445 spin_unlock(&osb->osb_lock);
446 }
447
448 if (!ret) {
449 /* Only save off the new mount options in case of a successful
450 * remount. */
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;
454 if (parsed_options.commit_interval)
455 osb->osb_commit_interval = parsed_options.commit_interval;
456
457 if (!ocfs2_is_hard_readonly(osb))
458 ocfs2_set_journal_params(osb);
459 }
460 out:
461 return ret;
462 }
463
464 static int ocfs2_sb_probe(struct super_block *sb,
465 struct buffer_head **bh,
466 int *sector_size)
467 {
468 int status, tmpstat;
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
541 bail:
542 return status;
543 }
544
545 static 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
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
563 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
564 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
565 !ocfs2_userspace_stack(osb)) {
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
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 */
580 static 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
604 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
605 {
606 struct dentry *root;
607 int status, sector_size;
608 struct mount_options parsed_options;
609 struct inode *inode = NULL;
610 struct ocfs2_super *osb = NULL;
611 struct buffer_head *bh = NULL;
612 char nodestr[8];
613
614 mlog_entry("%p, %p, %i", sb, data, silent);
615
616 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
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;
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;
639 osb->osb_commit_interval = parsed_options.commit_interval;
640 osb->local_alloc_size = parsed_options.localalloc_opt;
641
642 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
643 if (status)
644 goto read_super_error;
645
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)) {
686 if (sb->s_flags & MS_RDONLY)
687 ocfs2_set_ro_flag(osb, 0);
688 }
689
690 status = ocfs2_verify_heartbeat(osb);
691 if (status < 0) {
692 mlog_errno(status);
693 goto read_super_error;
694 }
695
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
728 if (ocfs2_mount_local(osb))
729 snprintf(nodestr, sizeof(nodestr), "local");
730 else
731 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
732
733 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
734 "with %s data mode.\n",
735 osb->dev_str, nodestr, osb->slot_num,
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
745 read_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
762 static 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)
767 {
768 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
769 mnt);
770 }
771
772 static 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? */
780 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
781 .next = NULL
782 };
783
784 static int ocfs2_parse_options(struct super_block *sb,
785 char *options,
786 struct mount_options *mopt,
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
795 mopt->commit_interval = 0;
796 mopt->mount_opt = 0;
797 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
798 mopt->slot = OCFS2_INVALID_SLOT;
799 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
800 mopt->cluster_stack[0] = '\0';
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:
817 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
818 break;
819 case Opt_hb_none:
820 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
821 break;
822 case Opt_barrier:
823 if (match_int(&args[0], &option)) {
824 status = 0;
825 goto bail;
826 }
827 if (option)
828 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
829 else
830 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
831 break;
832 case Opt_intr:
833 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
834 break;
835 case Opt_nointr:
836 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
837 break;
838 case Opt_err_panic:
839 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
840 break;
841 case Opt_err_ro:
842 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
843 break;
844 case Opt_data_ordered:
845 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
846 break;
847 case Opt_data_writeback:
848 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
849 break;
850 case Opt_atime_quantum:
851 if (match_int(&args[0], &option)) {
852 status = 0;
853 goto bail;
854 }
855 if (option >= 0)
856 mopt->atime_quantum = option;
857 break;
858 case Opt_slot:
859 option = 0;
860 if (match_int(&args[0], &option)) {
861 status = 0;
862 goto bail;
863 }
864 if (option)
865 mopt->slot = (s16)option;
866 break;
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;
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;
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;
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;
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
932 bail:
933 mlog_exit(status);
934 return status;
935 }
936
937 static 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;
941
942 if (opts & OCFS2_MOUNT_HB_LOCAL)
943 seq_printf(s, ",_netdev,heartbeat=local");
944 else
945 seq_printf(s, ",heartbeat=none");
946
947 if (opts & OCFS2_MOUNT_NOINTR)
948 seq_printf(s, ",nointr");
949
950 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
951 seq_printf(s, ",data=writeback");
952 else
953 seq_printf(s, ",data=ordered");
954
955 if (opts & OCFS2_MOUNT_BARRIER)
956 seq_printf(s, ",barrier=1");
957
958 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
959 seq_printf(s, ",errors=panic");
960 else
961 seq_printf(s, ",errors=remount-ro");
962
963 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
964 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
965
966 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
967 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
968
969 if (osb->osb_commit_interval)
970 seq_printf(s, ",commit=%u",
971 (unsigned) (osb->osb_commit_interval / HZ));
972
973 if (osb->local_alloc_size != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
974 seq_printf(s, ",localalloc=%d", osb->local_alloc_size);
975
976 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
977 seq_printf(s, ",localflocks,");
978
979 if (osb->osb_cluster_stack[0])
980 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
981 osb->osb_cluster_stack);
982
983 return 0;
984 }
985
986 static int __init ocfs2_init(void)
987 {
988 int status;
989
990 mlog_entry_void();
991
992 ocfs2_print_version();
993
994 status = init_ocfs2_uptodate_cache();
995 if (status < 0) {
996 mlog_errno(status);
997 goto leave;
998 }
999
1000 status = ocfs2_initialize_mem_caches();
1001 if (status < 0) {
1002 mlog_errno(status);
1003 goto leave;
1004 }
1005
1006 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1007 if (!ocfs2_wq) {
1008 status = -ENOMEM;
1009 goto leave;
1010 }
1011
1012 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1013 if (!ocfs2_debugfs_root) {
1014 status = -EFAULT;
1015 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1016 }
1017
1018 ocfs2_set_locking_protocol();
1019
1020 leave:
1021 if (status < 0) {
1022 ocfs2_free_mem_caches();
1023 exit_ocfs2_uptodate_cache();
1024 }
1025
1026 mlog_exit(status);
1027
1028 if (status >= 0) {
1029 return register_filesystem(&ocfs2_fs_type);
1030 } else
1031 return -1;
1032 }
1033
1034 static void __exit ocfs2_exit(void)
1035 {
1036 mlog_entry_void();
1037
1038 if (ocfs2_wq) {
1039 flush_workqueue(ocfs2_wq);
1040 destroy_workqueue(ocfs2_wq);
1041 }
1042
1043 debugfs_remove(ocfs2_debugfs_root);
1044
1045 ocfs2_free_mem_caches();
1046
1047 unregister_filesystem(&ocfs2_fs_type);
1048
1049 exit_ocfs2_uptodate_cache();
1050
1051 mlog_exit_void();
1052 }
1053
1054 static void ocfs2_put_super(struct super_block *sb)
1055 {
1056 mlog_entry("(0x%p)\n", sb);
1057
1058 ocfs2_sync_blockdev(sb);
1059 ocfs2_dismount_volume(sb, 0);
1060
1061 mlog_exit_void();
1062 }
1063
1064 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1065 {
1066 struct ocfs2_super *osb;
1067 u32 numbits, freebits;
1068 int status;
1069 struct ocfs2_dinode *bm_lock;
1070 struct buffer_head *bh = NULL;
1071 struct inode *inode = NULL;
1072
1073 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1074
1075 osb = OCFS2_SB(dentry->d_sb);
1076
1077 inode = ocfs2_get_system_file_inode(osb,
1078 GLOBAL_BITMAP_SYSTEM_INODE,
1079 OCFS2_INVALID_SLOT);
1080 if (!inode) {
1081 mlog(ML_ERROR, "failed to get bitmap inode\n");
1082 status = -EIO;
1083 goto bail;
1084 }
1085
1086 status = ocfs2_inode_lock(inode, &bh, 0);
1087 if (status < 0) {
1088 mlog_errno(status);
1089 goto bail;
1090 }
1091
1092 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1093
1094 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1095 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1096
1097 buf->f_type = OCFS2_SUPER_MAGIC;
1098 buf->f_bsize = dentry->d_sb->s_blocksize;
1099 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1100 buf->f_blocks = ((sector_t) numbits) *
1101 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1102 buf->f_bfree = ((sector_t) freebits) *
1103 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1104 buf->f_bavail = buf->f_bfree;
1105 buf->f_files = numbits;
1106 buf->f_ffree = freebits;
1107
1108 brelse(bh);
1109
1110 ocfs2_inode_unlock(inode, 0);
1111 status = 0;
1112 bail:
1113 if (inode)
1114 iput(inode);
1115
1116 mlog_exit(status);
1117
1118 return status;
1119 }
1120
1121 static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data)
1122 {
1123 struct ocfs2_inode_info *oi = data;
1124
1125 oi->ip_flags = 0;
1126 oi->ip_open_count = 0;
1127 spin_lock_init(&oi->ip_lock);
1128 ocfs2_extent_map_init(&oi->vfs_inode);
1129 INIT_LIST_HEAD(&oi->ip_io_markers);
1130 oi->ip_created_trans = 0;
1131 oi->ip_last_trans = 0;
1132 oi->ip_dir_start_lookup = 0;
1133
1134 init_rwsem(&oi->ip_alloc_sem);
1135 mutex_init(&oi->ip_io_mutex);
1136
1137 oi->ip_blkno = 0ULL;
1138 oi->ip_clusters = 0;
1139
1140 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1141 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1142 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1143
1144 ocfs2_metadata_cache_init(&oi->vfs_inode);
1145
1146 inode_init_once(&oi->vfs_inode);
1147 }
1148
1149 static int ocfs2_initialize_mem_caches(void)
1150 {
1151 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1152 sizeof(struct ocfs2_inode_info),
1153 0,
1154 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1155 SLAB_MEM_SPREAD),
1156 ocfs2_inode_init_once);
1157 if (!ocfs2_inode_cachep)
1158 return -ENOMEM;
1159
1160 return 0;
1161 }
1162
1163 static void ocfs2_free_mem_caches(void)
1164 {
1165 if (ocfs2_inode_cachep)
1166 kmem_cache_destroy(ocfs2_inode_cachep);
1167
1168 ocfs2_inode_cachep = NULL;
1169 }
1170
1171 static int ocfs2_get_sector(struct super_block *sb,
1172 struct buffer_head **bh,
1173 int block,
1174 int sect_size)
1175 {
1176 if (!sb_set_blocksize(sb, sect_size)) {
1177 mlog(ML_ERROR, "unable to set blocksize\n");
1178 return -EIO;
1179 }
1180
1181 *bh = sb_getblk(sb, block);
1182 if (!*bh) {
1183 mlog_errno(-EIO);
1184 return -EIO;
1185 }
1186 lock_buffer(*bh);
1187 if (!buffer_dirty(*bh))
1188 clear_buffer_uptodate(*bh);
1189 unlock_buffer(*bh);
1190 ll_rw_block(READ, 1, bh);
1191 wait_on_buffer(*bh);
1192 return 0;
1193 }
1194
1195 static int ocfs2_mount_volume(struct super_block *sb)
1196 {
1197 int status = 0;
1198 int unlock_super = 0;
1199 struct ocfs2_super *osb = OCFS2_SB(sb);
1200
1201 mlog_entry_void();
1202
1203 if (ocfs2_is_hard_readonly(osb))
1204 goto leave;
1205
1206 status = ocfs2_dlm_init(osb);
1207 if (status < 0) {
1208 mlog_errno(status);
1209 goto leave;
1210 }
1211
1212 status = ocfs2_super_lock(osb, 1);
1213 if (status < 0) {
1214 mlog_errno(status);
1215 goto leave;
1216 }
1217 unlock_super = 1;
1218
1219 /* This will load up the node map and add ourselves to it. */
1220 status = ocfs2_find_slot(osb);
1221 if (status < 0) {
1222 mlog_errno(status);
1223 goto leave;
1224 }
1225
1226 /* load all node-local system inodes */
1227 status = ocfs2_init_local_system_inodes(osb);
1228 if (status < 0) {
1229 mlog_errno(status);
1230 goto leave;
1231 }
1232
1233 status = ocfs2_check_volume(osb);
1234 if (status < 0) {
1235 mlog_errno(status);
1236 goto leave;
1237 }
1238
1239 status = ocfs2_truncate_log_init(osb);
1240 if (status < 0) {
1241 mlog_errno(status);
1242 goto leave;
1243 }
1244
1245 if (ocfs2_mount_local(osb))
1246 goto leave;
1247
1248 leave:
1249 if (unlock_super)
1250 ocfs2_super_unlock(osb, 1);
1251
1252 mlog_exit(status);
1253 return status;
1254 }
1255
1256 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1257 {
1258 int tmp, hangup_needed = 0;
1259 struct ocfs2_super *osb = NULL;
1260 char nodestr[8];
1261
1262 mlog_entry("(0x%p)\n", sb);
1263
1264 BUG_ON(!sb);
1265 osb = OCFS2_SB(sb);
1266 BUG_ON(!osb);
1267
1268 ocfs2_shutdown_local_alloc(osb);
1269
1270 ocfs2_truncate_log_shutdown(osb);
1271
1272 /* This will disable recovery and flush any recovery work. */
1273 ocfs2_recovery_exit(osb);
1274
1275 ocfs2_journal_shutdown(osb);
1276
1277 ocfs2_sync_blockdev(sb);
1278
1279 /* No cluster connection means we've failed during mount, so skip
1280 * all the steps which depended on that to complete. */
1281 if (osb->cconn) {
1282 tmp = ocfs2_super_lock(osb, 1);
1283 if (tmp < 0) {
1284 mlog_errno(tmp);
1285 return;
1286 }
1287 }
1288
1289 if (osb->slot_num != OCFS2_INVALID_SLOT)
1290 ocfs2_put_slot(osb);
1291
1292 if (osb->cconn)
1293 ocfs2_super_unlock(osb, 1);
1294
1295 ocfs2_release_system_inodes(osb);
1296
1297 /*
1298 * If we're dismounting due to mount error, mount.ocfs2 will clean
1299 * up heartbeat. If we're a local mount, there is no heartbeat.
1300 * If we failed before we got a uuid_str yet, we can't stop
1301 * heartbeat. Otherwise, do it.
1302 */
1303 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1304 hangup_needed = 1;
1305
1306 if (osb->cconn)
1307 ocfs2_dlm_shutdown(osb, hangup_needed);
1308
1309 debugfs_remove(osb->osb_debug_root);
1310
1311 if (hangup_needed)
1312 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1313
1314 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1315
1316 if (ocfs2_mount_local(osb))
1317 snprintf(nodestr, sizeof(nodestr), "local");
1318 else
1319 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1320
1321 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1322 osb->dev_str, nodestr);
1323
1324 ocfs2_delete_osb(osb);
1325 kfree(osb);
1326 sb->s_dev = 0;
1327 sb->s_fs_info = NULL;
1328 }
1329
1330 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1331 unsigned uuid_bytes)
1332 {
1333 int i, ret;
1334 char *ptr;
1335
1336 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1337
1338 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1339 if (osb->uuid_str == NULL)
1340 return -ENOMEM;
1341
1342 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1343 /* print with null */
1344 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1345 if (ret != 2) /* drop super cleans up */
1346 return -EINVAL;
1347 /* then only advance past the last char */
1348 ptr += 2;
1349 }
1350
1351 return 0;
1352 }
1353
1354 static int ocfs2_initialize_super(struct super_block *sb,
1355 struct buffer_head *bh,
1356 int sector_size)
1357 {
1358 int status;
1359 int i, cbits, bbits;
1360 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1361 struct inode *inode = NULL;
1362 struct ocfs2_journal *journal;
1363 __le32 uuid_net_key;
1364 struct ocfs2_super *osb;
1365
1366 mlog_entry_void();
1367
1368 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1369 if (!osb) {
1370 status = -ENOMEM;
1371 mlog_errno(status);
1372 goto bail;
1373 }
1374
1375 sb->s_fs_info = osb;
1376 sb->s_op = &ocfs2_sops;
1377 sb->s_export_op = &ocfs2_export_ops;
1378 sb->s_time_gran = 1;
1379 sb->s_flags |= MS_NOATIME;
1380 /* this is needed to support O_LARGEFILE */
1381 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1382 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1383 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1384
1385 osb->sb = sb;
1386 /* Save off for ocfs2_rw_direct */
1387 osb->s_sectsize_bits = blksize_bits(sector_size);
1388 BUG_ON(!osb->s_sectsize_bits);
1389
1390 spin_lock_init(&osb->dc_task_lock);
1391 init_waitqueue_head(&osb->dc_event);
1392 osb->dc_work_sequence = 0;
1393 osb->dc_wake_sequence = 0;
1394 INIT_LIST_HEAD(&osb->blocked_lock_list);
1395 osb->blocked_lock_count = 0;
1396 spin_lock_init(&osb->osb_lock);
1397 ocfs2_init_inode_steal_slot(osb);
1398
1399 atomic_set(&osb->alloc_stats.moves, 0);
1400 atomic_set(&osb->alloc_stats.local_data, 0);
1401 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1402 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1403 atomic_set(&osb->alloc_stats.bg_extends, 0);
1404
1405 ocfs2_init_node_maps(osb);
1406
1407 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1408 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1409
1410 status = ocfs2_recovery_init(osb);
1411 if (status) {
1412 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1413 mlog_errno(status);
1414 goto bail;
1415 }
1416
1417 init_waitqueue_head(&osb->checkpoint_event);
1418 atomic_set(&osb->needs_checkpoint, 0);
1419
1420 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1421
1422 osb->slot_num = OCFS2_INVALID_SLOT;
1423
1424 osb->local_alloc_state = OCFS2_LA_UNUSED;
1425 osb->local_alloc_bh = NULL;
1426
1427 init_waitqueue_head(&osb->osb_mount_event);
1428
1429 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1430 if (!osb->vol_label) {
1431 mlog(ML_ERROR, "unable to alloc vol label\n");
1432 status = -ENOMEM;
1433 goto bail;
1434 }
1435
1436 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1437 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1438 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1439 osb->max_slots);
1440 status = -EINVAL;
1441 goto bail;
1442 }
1443 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1444
1445 init_waitqueue_head(&osb->osb_wipe_event);
1446 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1447 sizeof(*osb->osb_orphan_wipes),
1448 GFP_KERNEL);
1449 if (!osb->osb_orphan_wipes) {
1450 status = -ENOMEM;
1451 mlog_errno(status);
1452 goto bail;
1453 }
1454
1455 osb->s_feature_compat =
1456 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1457 osb->s_feature_ro_compat =
1458 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1459 osb->s_feature_incompat =
1460 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1461
1462 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1463 mlog(ML_ERROR, "couldn't mount because of unsupported "
1464 "optional features (%x).\n", i);
1465 status = -EINVAL;
1466 goto bail;
1467 }
1468 if (!(osb->sb->s_flags & MS_RDONLY) &&
1469 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1470 mlog(ML_ERROR, "couldn't mount RDWR because of "
1471 "unsupported optional features (%x).\n", i);
1472 status = -EINVAL;
1473 goto bail;
1474 }
1475
1476 if (ocfs2_userspace_stack(osb)) {
1477 memcpy(osb->osb_cluster_stack,
1478 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1479 OCFS2_STACK_LABEL_LEN);
1480 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1481 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1482 mlog(ML_ERROR,
1483 "couldn't mount because of an invalid "
1484 "cluster stack label (%s) \n",
1485 osb->osb_cluster_stack);
1486 status = -EINVAL;
1487 goto bail;
1488 }
1489 } else {
1490 /* The empty string is identical with classic tools that
1491 * don't know about s_cluster_info. */
1492 osb->osb_cluster_stack[0] = '\0';
1493 }
1494
1495 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1496
1497 /* FIXME
1498 * This should be done in ocfs2_journal_init(), but unknown
1499 * ordering issues will cause the filesystem to crash.
1500 * If anyone wants to figure out what part of the code
1501 * refers to osb->journal before ocfs2_journal_init() is run,
1502 * be my guest.
1503 */
1504 /* initialize our journal structure */
1505
1506 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
1507 if (!journal) {
1508 mlog(ML_ERROR, "unable to alloc journal\n");
1509 status = -ENOMEM;
1510 goto bail;
1511 }
1512 osb->journal = journal;
1513 journal->j_osb = osb;
1514
1515 atomic_set(&journal->j_num_trans, 0);
1516 init_rwsem(&journal->j_trans_barrier);
1517 init_waitqueue_head(&journal->j_checkpointed);
1518 spin_lock_init(&journal->j_lock);
1519 journal->j_trans_id = (unsigned long) 1;
1520 INIT_LIST_HEAD(&journal->j_la_cleanups);
1521 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1522 journal->j_state = OCFS2_JOURNAL_FREE;
1523
1524 /* get some pseudo constants for clustersize bits */
1525 osb->s_clustersize_bits =
1526 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1527 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1528 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1529
1530 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1531 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1532 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1533 osb->s_clustersize);
1534 status = -EINVAL;
1535 goto bail;
1536 }
1537
1538 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1539 > (u32)~0UL) {
1540 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1541 "what jbd can address in 32 bits.\n");
1542 status = -EINVAL;
1543 goto bail;
1544 }
1545
1546 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1547 sizeof(di->id2.i_super.s_uuid))) {
1548 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1549 status = -ENOMEM;
1550 goto bail;
1551 }
1552
1553 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1554
1555 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1556 osb->vol_label[63] = '\0';
1557 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1558 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1559 osb->first_cluster_group_blkno =
1560 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1561 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1562 mlog(0, "vol_label: %s\n", osb->vol_label);
1563 mlog(0, "uuid: %s\n", osb->uuid_str);
1564 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1565 (unsigned long long)osb->root_blkno,
1566 (unsigned long long)osb->system_dir_blkno);
1567
1568 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1569 if (!osb->osb_dlm_debug) {
1570 status = -ENOMEM;
1571 mlog_errno(status);
1572 goto bail;
1573 }
1574
1575 atomic_set(&osb->vol_state, VOLUME_INIT);
1576
1577 /* load root, system_dir, and all global system inodes */
1578 status = ocfs2_init_global_system_inodes(osb);
1579 if (status < 0) {
1580 mlog_errno(status);
1581 goto bail;
1582 }
1583
1584 /*
1585 * global bitmap
1586 */
1587 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1588 OCFS2_INVALID_SLOT);
1589 if (!inode) {
1590 status = -EINVAL;
1591 mlog_errno(status);
1592 goto bail;
1593 }
1594
1595 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1596 iput(inode);
1597
1598 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
1599
1600 status = ocfs2_init_slot_info(osb);
1601 if (status < 0) {
1602 mlog_errno(status);
1603 goto bail;
1604 }
1605
1606 bail:
1607 mlog_exit(status);
1608 return status;
1609 }
1610
1611 /*
1612 * will return: -EAGAIN if it is ok to keep searching for superblocks
1613 * -EINVAL if there is a bad superblock
1614 * 0 on success
1615 */
1616 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1617 struct buffer_head *bh,
1618 u32 blksz)
1619 {
1620 int status = -EAGAIN;
1621
1622 mlog_entry_void();
1623
1624 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1625 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1626 status = -EINVAL;
1627 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1628 mlog(ML_ERROR, "found superblock with incorrect block "
1629 "size: found %u, should be %u\n",
1630 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1631 blksz);
1632 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1633 OCFS2_MAJOR_REV_LEVEL ||
1634 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1635 OCFS2_MINOR_REV_LEVEL) {
1636 mlog(ML_ERROR, "found superblock with bad version: "
1637 "found %u.%u, should be %u.%u\n",
1638 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1639 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1640 OCFS2_MAJOR_REV_LEVEL,
1641 OCFS2_MINOR_REV_LEVEL);
1642 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1643 mlog(ML_ERROR, "bad block number on superblock: "
1644 "found %llu, should be %llu\n",
1645 (unsigned long long)le64_to_cpu(di->i_blkno),
1646 (unsigned long long)bh->b_blocknr);
1647 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1648 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1649 mlog(ML_ERROR, "bad cluster size found: %u\n",
1650 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1651 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1652 mlog(ML_ERROR, "bad root_blkno: 0\n");
1653 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1654 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1655 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1656 mlog(ML_ERROR,
1657 "Superblock slots found greater than file system "
1658 "maximum: found %u, max %u\n",
1659 le16_to_cpu(di->id2.i_super.s_max_slots),
1660 OCFS2_MAX_SLOTS);
1661 } else {
1662 /* found it! */
1663 status = 0;
1664 }
1665 }
1666
1667 mlog_exit(status);
1668 return status;
1669 }
1670
1671 static int ocfs2_check_volume(struct ocfs2_super *osb)
1672 {
1673 int status;
1674 int dirty;
1675 int local;
1676 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1677 * recover
1678 * ourselves. */
1679
1680 mlog_entry_void();
1681
1682 /* Init our journal object. */
1683 status = ocfs2_journal_init(osb->journal, &dirty);
1684 if (status < 0) {
1685 mlog(ML_ERROR, "Could not initialize journal!\n");
1686 goto finally;
1687 }
1688
1689 /* If the journal was unmounted cleanly then we don't want to
1690 * recover anything. Otherwise, journal_load will do that
1691 * dirty work for us :) */
1692 if (!dirty) {
1693 status = ocfs2_journal_wipe(osb->journal, 0);
1694 if (status < 0) {
1695 mlog_errno(status);
1696 goto finally;
1697 }
1698 } else {
1699 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1700 "recovering volume.\n");
1701 }
1702
1703 local = ocfs2_mount_local(osb);
1704
1705 /* will play back anything left in the journal. */
1706 ocfs2_journal_load(osb->journal, local);
1707
1708 if (dirty) {
1709 /* recover my local alloc if we didn't unmount cleanly. */
1710 status = ocfs2_begin_local_alloc_recovery(osb,
1711 osb->slot_num,
1712 &local_alloc);
1713 if (status < 0) {
1714 mlog_errno(status);
1715 goto finally;
1716 }
1717 /* we complete the recovery process after we've marked
1718 * ourselves as mounted. */
1719 }
1720
1721 mlog(0, "Journal loaded.\n");
1722
1723 status = ocfs2_load_local_alloc(osb);
1724 if (status < 0) {
1725 mlog_errno(status);
1726 goto finally;
1727 }
1728
1729 if (dirty) {
1730 /* Recovery will be completed after we've mounted the
1731 * rest of the volume. */
1732 osb->dirty = 1;
1733 osb->local_alloc_copy = local_alloc;
1734 local_alloc = NULL;
1735 }
1736
1737 /* go through each journal, trylock it and if you get the
1738 * lock, and it's marked as dirty, set the bit in the recover
1739 * map and launch a recovery thread for it. */
1740 status = ocfs2_mark_dead_nodes(osb);
1741 if (status < 0)
1742 mlog_errno(status);
1743
1744 finally:
1745 if (local_alloc)
1746 kfree(local_alloc);
1747
1748 mlog_exit(status);
1749 return status;
1750 }
1751
1752 /*
1753 * The routine gets called from dismount or close whenever a dismount on
1754 * volume is requested and the osb open count becomes 1.
1755 * It will remove the osb from the global list and also free up all the
1756 * initialized resources and fileobject.
1757 */
1758 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1759 {
1760 mlog_entry_void();
1761
1762 /* This function assumes that the caller has the main osb resource */
1763
1764 ocfs2_free_slot_info(osb);
1765
1766 kfree(osb->osb_orphan_wipes);
1767 /* FIXME
1768 * This belongs in journal shutdown, but because we have to
1769 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1770 * we free it here.
1771 */
1772 kfree(osb->journal);
1773 if (osb->local_alloc_copy)
1774 kfree(osb->local_alloc_copy);
1775 kfree(osb->uuid_str);
1776 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1777 memset(osb, 0, sizeof(struct ocfs2_super));
1778
1779 mlog_exit_void();
1780 }
1781
1782 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1783 * panic(). We do not support continue-on-error operation. */
1784 static void ocfs2_handle_error(struct super_block *sb)
1785 {
1786 struct ocfs2_super *osb = OCFS2_SB(sb);
1787
1788 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1789 panic("OCFS2: (device %s): panic forced after error\n",
1790 sb->s_id);
1791
1792 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1793
1794 if (sb->s_flags & MS_RDONLY &&
1795 (ocfs2_is_soft_readonly(osb) ||
1796 ocfs2_is_hard_readonly(osb)))
1797 return;
1798
1799 printk(KERN_CRIT "File system is now read-only due to the potential "
1800 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1801 "system is unmounted.\n");
1802 sb->s_flags |= MS_RDONLY;
1803 ocfs2_set_ro_flag(osb, 0);
1804 }
1805
1806 static char error_buf[1024];
1807
1808 void __ocfs2_error(struct super_block *sb,
1809 const char *function,
1810 const char *fmt, ...)
1811 {
1812 va_list args;
1813
1814 va_start(args, fmt);
1815 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1816 va_end(args);
1817
1818 /* Not using mlog here because we want to show the actual
1819 * function the error came from. */
1820 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1821 sb->s_id, function, error_buf);
1822
1823 ocfs2_handle_error(sb);
1824 }
1825
1826 /* Handle critical errors. This is intentionally more drastic than
1827 * ocfs2_handle_error, so we only use for things like journal errors,
1828 * etc. */
1829 void __ocfs2_abort(struct super_block* sb,
1830 const char *function,
1831 const char *fmt, ...)
1832 {
1833 va_list args;
1834
1835 va_start(args, fmt);
1836 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1837 va_end(args);
1838
1839 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1840 sb->s_id, function, error_buf);
1841
1842 /* We don't have the cluster support yet to go straight to
1843 * hard readonly in here. Until then, we want to keep
1844 * ocfs2_abort() so that we can at least mark critical
1845 * errors.
1846 *
1847 * TODO: This should abort the journal and alert other nodes
1848 * that our slot needs recovery. */
1849
1850 /* Force a panic(). This stinks, but it's better than letting
1851 * things continue without having a proper hard readonly
1852 * here. */
1853 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1854 ocfs2_handle_error(sb);
1855 }
1856
1857 module_init(ocfs2_init);
1858 module_exit(ocfs2_exit);
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