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ocfs2: Implement show_options()
[linux-2.6.git] / fs / ocfs2 / super.c
blobe5ac0714dab2916f1b1c5b570ae2ca72f2835370
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
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"
68 #include "vote.h"
69
70 #include "buffer_head_io.h"
71
72 static struct kmem_cache *ocfs2_inode_cachep = NULL;
73
74 /* OCFS2 needs to schedule several differnt types of work which
75 * require cluster locking, disk I/O, recovery waits, etc. Since these
76 * types of work tend to be heavy we avoid using the kernel events
77 * workqueue and schedule on our own. */
78 struct workqueue_struct *ocfs2_wq = NULL;
79
80 static struct dentry *ocfs2_debugfs_root = NULL;
81
82 MODULE_AUTHOR("Oracle");
83 MODULE_LICENSE("GPL");
84
85 struct mount_options
86 {
87 unsigned long mount_opt;
88 unsigned int atime_quantum;
89 signed short slot;
90 };
91
92 static int ocfs2_parse_options(struct super_block *sb, char *options,
93 struct mount_options *mopt,
94 int is_remount);
95 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
96 static void ocfs2_put_super(struct super_block *sb);
97 static int ocfs2_mount_volume(struct super_block *sb);
98 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
99 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
100 static int ocfs2_initialize_mem_caches(void);
101 static void ocfs2_free_mem_caches(void);
102 static void ocfs2_delete_osb(struct ocfs2_super *osb);
103
104 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
105
106 static int ocfs2_sync_fs(struct super_block *sb, int wait);
107
108 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
109 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
110 static int ocfs2_release_system_inodes(struct ocfs2_super *osb);
111 static int ocfs2_fill_local_node_info(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_err,
154 };
155
156 static match_table_t tokens = {
157 {Opt_barrier, "barrier=%u"},
158 {Opt_err_panic, "errors=panic"},
159 {Opt_err_ro, "errors=remount-ro"},
160 {Opt_intr, "intr"},
161 {Opt_nointr, "nointr"},
162 {Opt_hb_none, OCFS2_HB_NONE},
163 {Opt_hb_local, OCFS2_HB_LOCAL},
164 {Opt_data_ordered, "data=ordered"},
165 {Opt_data_writeback, "data=writeback"},
166 {Opt_atime_quantum, "atime_quantum=%u"},
167 {Opt_slot, "preferred_slot=%u"},
168 {Opt_err, NULL}
169 };
170
171 /*
172 * write_super and sync_fs ripped right out of ext3.
173 */
174 static void ocfs2_write_super(struct super_block *sb)
175 {
176 if (mutex_trylock(&sb->s_lock) != 0)
177 BUG();
178 sb->s_dirt = 0;
179 }
180
181 static int ocfs2_sync_fs(struct super_block *sb, int wait)
182 {
183 int status = 0;
184 tid_t target;
185 struct ocfs2_super *osb = OCFS2_SB(sb);
186
187 sb->s_dirt = 0;
188
189 if (ocfs2_is_hard_readonly(osb))
190 return -EROFS;
191
192 if (wait) {
193 status = ocfs2_flush_truncate_log(osb);
194 if (status < 0)
195 mlog_errno(status);
196 } else {
197 ocfs2_schedule_truncate_log_flush(osb, 0);
198 }
199
200 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
201 if (wait)
202 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
203 target);
204 }
205 return 0;
206 }
207
208 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
209 {
210 struct inode *new = NULL;
211 int status = 0;
212 int i;
213
214 mlog_entry_void();
215
216 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE);
217 if (IS_ERR(new)) {
218 status = PTR_ERR(new);
219 mlog_errno(status);
220 goto bail;
221 }
222 osb->root_inode = new;
223
224 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE);
225 if (IS_ERR(new)) {
226 status = PTR_ERR(new);
227 mlog_errno(status);
228 goto bail;
229 }
230 osb->sys_root_inode = new;
231
232 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
233 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
234 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
235 if (!new) {
236 ocfs2_release_system_inodes(osb);
237 status = -EINVAL;
238 mlog_errno(status);
239 /* FIXME: Should ERROR_RO_FS */
240 mlog(ML_ERROR, "Unable to load system inode %d, "
241 "possibly corrupt fs?", i);
242 goto bail;
243 }
244 // the array now has one ref, so drop this one
245 iput(new);
246 }
247
248 bail:
249 mlog_exit(status);
250 return status;
251 }
252
253 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
254 {
255 struct inode *new = NULL;
256 int status = 0;
257 int i;
258
259 mlog_entry_void();
260
261 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
262 i < NUM_SYSTEM_INODES;
263 i++) {
264 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
265 if (!new) {
266 ocfs2_release_system_inodes(osb);
267 status = -EINVAL;
268 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
269 status, i, osb->slot_num);
270 goto bail;
271 }
272 /* the array now has one ref, so drop this one */
273 iput(new);
274 }
275
276 bail:
277 mlog_exit(status);
278 return status;
279 }
280
281 static int ocfs2_release_system_inodes(struct ocfs2_super *osb)
282 {
283 int status = 0, i;
284 struct inode *inode;
285
286 mlog_entry_void();
287
288 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
289 inode = osb->system_inodes[i];
290 if (inode) {
291 iput(inode);
292 osb->system_inodes[i] = NULL;
293 }
294 }
295
296 inode = osb->sys_root_inode;
297 if (inode) {
298 iput(inode);
299 osb->sys_root_inode = NULL;
300 }
301
302 inode = osb->root_inode;
303 if (inode) {
304 iput(inode);
305 osb->root_inode = NULL;
306 }
307
308 mlog_exit(status);
309 return status;
310 }
311
312 /* We're allocating fs objects, use GFP_NOFS */
313 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
314 {
315 struct ocfs2_inode_info *oi;
316
317 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
318 if (!oi)
319 return NULL;
320
321 return &oi->vfs_inode;
322 }
323
324 static void ocfs2_destroy_inode(struct inode *inode)
325 {
326 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
327 }
328
329 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
330 unsigned int cbits)
331 {
332 unsigned int bytes = 1 << cbits;
333 unsigned int trim = bytes;
334 unsigned int bitshift = 32;
335
336 /*
337 * i_size and all block offsets in ocfs2 are always 64 bits
338 * wide. i_clusters is 32 bits, in cluster-sized units. So on
339 * 64 bit platforms, cluster size will be the limiting factor.
340 */
341
342 #if BITS_PER_LONG == 32
343 # if defined(CONFIG_LBD)
344 BUILD_BUG_ON(sizeof(sector_t) != 8);
345 /*
346 * We might be limited by page cache size.
347 */
348 if (bytes > PAGE_CACHE_SIZE) {
349 bytes = PAGE_CACHE_SIZE;
350 trim = 1;
351 /*
352 * Shift by 31 here so that we don't get larger than
353 * MAX_LFS_FILESIZE
354 */
355 bitshift = 31;
356 }
357 # else
358 /*
359 * We are limited by the size of sector_t. Use block size, as
360 * that's what we expose to the VFS.
361 */
362 bytes = 1 << bbits;
363 trim = 1;
364 bitshift = 31;
365 # endif
366 #endif
367
368 /*
369 * Trim by a whole cluster when we can actually approach the
370 * on-disk limits. Otherwise we can overflow i_clusters when
371 * an extent start is at the max offset.
372 */
373 return (((unsigned long long)bytes) << bitshift) - trim;
374 }
375
376 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
377 {
378 int incompat_features;
379 int ret = 0;
380 struct mount_options parsed_options;
381 struct ocfs2_super *osb = OCFS2_SB(sb);
382
383 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
384 ret = -EINVAL;
385 goto out;
386 }
387
388 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
389 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
390 ret = -EINVAL;
391 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
392 goto out;
393 }
394
395 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
396 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
397 ret = -EINVAL;
398 mlog(ML_ERROR, "Cannot change data mode on remount\n");
399 goto out;
400 }
401
402 /* We're going to/from readonly mode. */
403 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
404 /* Lock here so the check of HARD_RO and the potential
405 * setting of SOFT_RO is atomic. */
406 spin_lock(&osb->osb_lock);
407 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
408 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
409 ret = -EROFS;
410 goto unlock_osb;
411 }
412
413 if (*flags & MS_RDONLY) {
414 mlog(0, "Going to ro mode.\n");
415 sb->s_flags |= MS_RDONLY;
416 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
417 } else {
418 mlog(0, "Making ro filesystem writeable.\n");
419
420 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
421 mlog(ML_ERROR, "Cannot remount RDWR "
422 "filesystem due to previous errors.\n");
423 ret = -EROFS;
424 goto unlock_osb;
425 }
426 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
427 if (incompat_features) {
428 mlog(ML_ERROR, "Cannot remount RDWR because "
429 "of unsupported optional features "
430 "(%x).\n", incompat_features);
431 ret = -EINVAL;
432 goto unlock_osb;
433 }
434 sb->s_flags &= ~MS_RDONLY;
435 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
436 }
437 unlock_osb:
438 spin_unlock(&osb->osb_lock);
439 }
440
441 if (!ret) {
442 if (!ocfs2_is_hard_readonly(osb))
443 ocfs2_set_journal_params(osb);
444
445 /* Only save off the new mount options in case of a successful
446 * remount. */
447 osb->s_mount_opt = parsed_options.mount_opt;
448 osb->s_atime_quantum = parsed_options.atime_quantum;
449 osb->preferred_slot = parsed_options.slot;
450 }
451 out:
452 return ret;
453 }
454
455 static int ocfs2_sb_probe(struct super_block *sb,
456 struct buffer_head **bh,
457 int *sector_size)
458 {
459 int status = 0, tmpstat;
460 struct ocfs1_vol_disk_hdr *hdr;
461 struct ocfs2_dinode *di;
462 int blksize;
463
464 *bh = NULL;
465
466 /* may be > 512 */
467 *sector_size = bdev_hardsect_size(sb->s_bdev);
468 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
469 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
470 *sector_size, OCFS2_MAX_BLOCKSIZE);
471 status = -EINVAL;
472 goto bail;
473 }
474
475 /* Can this really happen? */
476 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
477 *sector_size = OCFS2_MIN_BLOCKSIZE;
478
479 /* check block zero for old format */
480 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
481 if (status < 0) {
482 mlog_errno(status);
483 goto bail;
484 }
485 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
486 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
487 mlog(ML_ERROR, "incompatible version: %u.%u\n",
488 hdr->major_version, hdr->minor_version);
489 status = -EINVAL;
490 }
491 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
492 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
493 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
494 hdr->signature);
495 status = -EINVAL;
496 }
497 brelse(*bh);
498 *bh = NULL;
499 if (status < 0) {
500 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
501 "upgraded before mounting with ocfs v2\n");
502 goto bail;
503 }
504
505 /*
506 * Now check at magic offset for 512, 1024, 2048, 4096
507 * blocksizes. 4096 is the maximum blocksize because it is
508 * the minimum clustersize.
509 */
510 status = -EINVAL;
511 for (blksize = *sector_size;
512 blksize <= OCFS2_MAX_BLOCKSIZE;
513 blksize <<= 1) {
514 tmpstat = ocfs2_get_sector(sb, bh,
515 OCFS2_SUPER_BLOCK_BLKNO,
516 blksize);
517 if (tmpstat < 0) {
518 status = tmpstat;
519 mlog_errno(status);
520 goto bail;
521 }
522 di = (struct ocfs2_dinode *) (*bh)->b_data;
523 status = ocfs2_verify_volume(di, *bh, blksize);
524 if (status >= 0)
525 goto bail;
526 brelse(*bh);
527 *bh = NULL;
528 if (status != -EAGAIN)
529 break;
530 }
531
532 bail:
533 return status;
534 }
535
536 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
537 {
538 if (ocfs2_mount_local(osb)) {
539 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
540 mlog(ML_ERROR, "Cannot heartbeat on a locally "
541 "mounted device.\n");
542 return -EINVAL;
543 }
544 }
545
546 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
547 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb)) {
548 mlog(ML_ERROR, "Heartbeat has to be started to mount "
549 "a read-write clustered device.\n");
550 return -EINVAL;
551 }
552 }
553
554 return 0;
555 }
556
557 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
558 {
559 struct dentry *root;
560 int status, sector_size;
561 struct mount_options parsed_options;
562 struct inode *inode = NULL;
563 struct ocfs2_super *osb = NULL;
564 struct buffer_head *bh = NULL;
565 char nodestr[8];
566
567 mlog_entry("%p, %p, %i", sb, data, silent);
568
569 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
570 status = -EINVAL;
571 goto read_super_error;
572 }
573
574 /* for now we only have one cluster/node, make sure we see it
575 * in the heartbeat universe */
576 if (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL) {
577 if (!o2hb_check_local_node_heartbeating()) {
578 status = -EINVAL;
579 goto read_super_error;
580 }
581 }
582
583 /* probe for superblock */
584 status = ocfs2_sb_probe(sb, &bh, &sector_size);
585 if (status < 0) {
586 mlog(ML_ERROR, "superblock probe failed!\n");
587 goto read_super_error;
588 }
589
590 status = ocfs2_initialize_super(sb, bh, sector_size);
591 osb = OCFS2_SB(sb);
592 if (status < 0) {
593 mlog_errno(status);
594 goto read_super_error;
595 }
596 brelse(bh);
597 bh = NULL;
598 osb->s_mount_opt = parsed_options.mount_opt;
599 osb->s_atime_quantum = parsed_options.atime_quantum;
600 osb->preferred_slot = parsed_options.slot;
601
602 sb->s_magic = OCFS2_SUPER_MAGIC;
603
604 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
605 * heartbeat=none */
606 if (bdev_read_only(sb->s_bdev)) {
607 if (!(sb->s_flags & MS_RDONLY)) {
608 status = -EACCES;
609 mlog(ML_ERROR, "Readonly device detected but readonly "
610 "mount was not specified.\n");
611 goto read_super_error;
612 }
613
614 /* You should not be able to start a local heartbeat
615 * on a readonly device. */
616 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
617 status = -EROFS;
618 mlog(ML_ERROR, "Local heartbeat specified on readonly "
619 "device.\n");
620 goto read_super_error;
621 }
622
623 status = ocfs2_check_journals_nolocks(osb);
624 if (status < 0) {
625 if (status == -EROFS)
626 mlog(ML_ERROR, "Recovery required on readonly "
627 "file system, but write access is "
628 "unavailable.\n");
629 else
630 mlog_errno(status);
631 goto read_super_error;
632 }
633
634 ocfs2_set_ro_flag(osb, 1);
635
636 printk(KERN_NOTICE "Readonly device detected. No cluster "
637 "services will be utilized for this mount. Recovery "
638 "will be skipped.\n");
639 }
640
641 if (!ocfs2_is_hard_readonly(osb)) {
642 if (sb->s_flags & MS_RDONLY)
643 ocfs2_set_ro_flag(osb, 0);
644 }
645
646 status = ocfs2_verify_heartbeat(osb);
647 if (status < 0) {
648 mlog_errno(status);
649 goto read_super_error;
650 }
651
652 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
653 ocfs2_debugfs_root);
654 if (!osb->osb_debug_root) {
655 status = -EINVAL;
656 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
657 goto read_super_error;
658 }
659
660 status = ocfs2_mount_volume(sb);
661 if (osb->root_inode)
662 inode = igrab(osb->root_inode);
663
664 if (status < 0)
665 goto read_super_error;
666
667 if (!inode) {
668 status = -EIO;
669 mlog_errno(status);
670 goto read_super_error;
671 }
672
673 root = d_alloc_root(inode);
674 if (!root) {
675 status = -ENOMEM;
676 mlog_errno(status);
677 goto read_super_error;
678 }
679
680 sb->s_root = root;
681
682 ocfs2_complete_mount_recovery(osb);
683
684 if (ocfs2_mount_local(osb))
685 snprintf(nodestr, sizeof(nodestr), "local");
686 else
687 snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num);
688
689 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
690 "with %s data mode.\n",
691 osb->dev_str, nodestr, osb->slot_num,
692 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
693 "ordered");
694
695 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
696 wake_up(&osb->osb_mount_event);
697
698 mlog_exit(status);
699 return status;
700
701 read_super_error:
702 if (bh != NULL)
703 brelse(bh);
704
705 if (inode)
706 iput(inode);
707
708 if (osb) {
709 atomic_set(&osb->vol_state, VOLUME_DISABLED);
710 wake_up(&osb->osb_mount_event);
711 ocfs2_dismount_volume(sb, 1);
712 }
713
714 mlog_exit(status);
715 return status;
716 }
717
718 static int ocfs2_get_sb(struct file_system_type *fs_type,
719 int flags,
720 const char *dev_name,
721 void *data,
722 struct vfsmount *mnt)
723 {
724 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
725 mnt);
726 }
727
728 static struct file_system_type ocfs2_fs_type = {
729 .owner = THIS_MODULE,
730 .name = "ocfs2",
731 .get_sb = ocfs2_get_sb, /* is this called when we mount
732 * the fs? */
733 .kill_sb = kill_block_super, /* set to the generic one
734 * right now, but do we
735 * need to change that? */
736 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
737 .next = NULL
738 };
739
740 static int ocfs2_parse_options(struct super_block *sb,
741 char *options,
742 struct mount_options *mopt,
743 int is_remount)
744 {
745 int status;
746 char *p;
747
748 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
749 options ? options : "(none)");
750
751 mopt->mount_opt = 0;
752 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
753 mopt->slot = OCFS2_INVALID_SLOT;
754
755 if (!options) {
756 status = 1;
757 goto bail;
758 }
759
760 while ((p = strsep(&options, ",")) != NULL) {
761 int token, option;
762 substring_t args[MAX_OPT_ARGS];
763
764 if (!*p)
765 continue;
766
767 token = match_token(p, tokens, args);
768 switch (token) {
769 case Opt_hb_local:
770 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
771 break;
772 case Opt_hb_none:
773 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
774 break;
775 case Opt_barrier:
776 if (match_int(&args[0], &option)) {
777 status = 0;
778 goto bail;
779 }
780 if (option)
781 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
782 else
783 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
784 break;
785 case Opt_intr:
786 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
787 break;
788 case Opt_nointr:
789 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
790 break;
791 case Opt_err_panic:
792 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
793 break;
794 case Opt_err_ro:
795 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
796 break;
797 case Opt_data_ordered:
798 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
799 break;
800 case Opt_data_writeback:
801 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
802 break;
803 case Opt_atime_quantum:
804 if (match_int(&args[0], &option)) {
805 status = 0;
806 goto bail;
807 }
808 if (option >= 0)
809 mopt->atime_quantum = option;
810 break;
811 case Opt_slot:
812 option = 0;
813 if (match_int(&args[0], &option)) {
814 status = 0;
815 goto bail;
816 }
817 if (option)
818 mopt->slot = (s16)option;
819 break;
820 default:
821 mlog(ML_ERROR,
822 "Unrecognized mount option \"%s\" "
823 "or missing value\n", p);
824 status = 0;
825 goto bail;
826 }
827 }
828
829 status = 1;
830
831 bail:
832 mlog_exit(status);
833 return status;
834 }
835
836 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
837 {
838 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
839 unsigned long opts = osb->s_mount_opt;
840
841 if (opts & OCFS2_MOUNT_HB_LOCAL)
842 seq_printf(s, ",_netdev,heartbeat=local");
843 else
844 seq_printf(s, ",heartbeat=none");
845
846 if (opts & OCFS2_MOUNT_NOINTR)
847 seq_printf(s, ",nointr");
848
849 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
850 seq_printf(s, ",data=writeback");
851 else
852 seq_printf(s, ",data=ordered");
853
854 if (opts & OCFS2_MOUNT_BARRIER)
855 seq_printf(s, ",barrier=1");
856
857 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
858 seq_printf(s, ",errors=panic");
859 else
860 seq_printf(s, ",errors=remount-ro");
861
862 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
863 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
864
865 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
866 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
867
868 return 0;
869 }
870
871 static int __init ocfs2_init(void)
872 {
873 int status;
874
875 mlog_entry_void();
876
877 ocfs2_print_version();
878
879 status = init_ocfs2_uptodate_cache();
880 if (status < 0) {
881 mlog_errno(status);
882 goto leave;
883 }
884
885 status = ocfs2_initialize_mem_caches();
886 if (status < 0) {
887 mlog_errno(status);
888 goto leave;
889 }
890
891 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
892 if (!ocfs2_wq) {
893 status = -ENOMEM;
894 goto leave;
895 }
896
897 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
898 if (!ocfs2_debugfs_root) {
899 status = -EFAULT;
900 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
901 }
902
903 leave:
904 if (status < 0) {
905 ocfs2_free_mem_caches();
906 exit_ocfs2_uptodate_cache();
907 }
908
909 mlog_exit(status);
910
911 if (status >= 0) {
912 return register_filesystem(&ocfs2_fs_type);
913 } else
914 return -1;
915 }
916
917 static void __exit ocfs2_exit(void)
918 {
919 mlog_entry_void();
920
921 if (ocfs2_wq) {
922 flush_workqueue(ocfs2_wq);
923 destroy_workqueue(ocfs2_wq);
924 }
925
926 debugfs_remove(ocfs2_debugfs_root);
927
928 ocfs2_free_mem_caches();
929
930 unregister_filesystem(&ocfs2_fs_type);
931
932 exit_ocfs2_uptodate_cache();
933
934 mlog_exit_void();
935 }
936
937 static void ocfs2_put_super(struct super_block *sb)
938 {
939 mlog_entry("(0x%p)\n", sb);
940
941 ocfs2_sync_blockdev(sb);
942 ocfs2_dismount_volume(sb, 0);
943
944 mlog_exit_void();
945 }
946
947 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
948 {
949 struct ocfs2_super *osb;
950 u32 numbits, freebits;
951 int status;
952 struct ocfs2_dinode *bm_lock;
953 struct buffer_head *bh = NULL;
954 struct inode *inode = NULL;
955
956 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
957
958 osb = OCFS2_SB(dentry->d_sb);
959
960 inode = ocfs2_get_system_file_inode(osb,
961 GLOBAL_BITMAP_SYSTEM_INODE,
962 OCFS2_INVALID_SLOT);
963 if (!inode) {
964 mlog(ML_ERROR, "failed to get bitmap inode\n");
965 status = -EIO;
966 goto bail;
967 }
968
969 status = ocfs2_meta_lock(inode, &bh, 0);
970 if (status < 0) {
971 mlog_errno(status);
972 goto bail;
973 }
974
975 bm_lock = (struct ocfs2_dinode *) bh->b_data;
976
977 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
978 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
979
980 buf->f_type = OCFS2_SUPER_MAGIC;
981 buf->f_bsize = dentry->d_sb->s_blocksize;
982 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
983 buf->f_blocks = ((sector_t) numbits) *
984 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
985 buf->f_bfree = ((sector_t) freebits) *
986 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
987 buf->f_bavail = buf->f_bfree;
988 buf->f_files = numbits;
989 buf->f_ffree = freebits;
990
991 brelse(bh);
992
993 ocfs2_meta_unlock(inode, 0);
994 status = 0;
995 bail:
996 if (inode)
997 iput(inode);
998
999 mlog_exit(status);
1000
1001 return status;
1002 }
1003
1004 static void ocfs2_inode_init_once(void *data,
1005 struct kmem_cache *cachep,
1006 unsigned long flags)
1007 {
1008 struct ocfs2_inode_info *oi = data;
1009
1010 oi->ip_flags = 0;
1011 oi->ip_open_count = 0;
1012 spin_lock_init(&oi->ip_lock);
1013 ocfs2_extent_map_init(&oi->vfs_inode);
1014 INIT_LIST_HEAD(&oi->ip_io_markers);
1015 oi->ip_created_trans = 0;
1016 oi->ip_last_trans = 0;
1017 oi->ip_dir_start_lookup = 0;
1018
1019 init_rwsem(&oi->ip_alloc_sem);
1020 mutex_init(&oi->ip_io_mutex);
1021
1022 oi->ip_blkno = 0ULL;
1023 oi->ip_clusters = 0;
1024
1025 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1026 ocfs2_lock_res_init_once(&oi->ip_meta_lockres);
1027 ocfs2_lock_res_init_once(&oi->ip_data_lockres);
1028 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1029
1030 ocfs2_metadata_cache_init(&oi->vfs_inode);
1031
1032 inode_init_once(&oi->vfs_inode);
1033 }
1034
1035 static int ocfs2_initialize_mem_caches(void)
1036 {
1037 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1038 sizeof(struct ocfs2_inode_info),
1039 0,
1040 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1041 SLAB_MEM_SPREAD),
1042 ocfs2_inode_init_once);
1043 if (!ocfs2_inode_cachep)
1044 return -ENOMEM;
1045
1046 return 0;
1047 }
1048
1049 static void ocfs2_free_mem_caches(void)
1050 {
1051 if (ocfs2_inode_cachep)
1052 kmem_cache_destroy(ocfs2_inode_cachep);
1053
1054 ocfs2_inode_cachep = NULL;
1055 }
1056
1057 static int ocfs2_get_sector(struct super_block *sb,
1058 struct buffer_head **bh,
1059 int block,
1060 int sect_size)
1061 {
1062 if (!sb_set_blocksize(sb, sect_size)) {
1063 mlog(ML_ERROR, "unable to set blocksize\n");
1064 return -EIO;
1065 }
1066
1067 *bh = sb_getblk(sb, block);
1068 if (!*bh) {
1069 mlog_errno(-EIO);
1070 return -EIO;
1071 }
1072 lock_buffer(*bh);
1073 if (!buffer_dirty(*bh))
1074 clear_buffer_uptodate(*bh);
1075 unlock_buffer(*bh);
1076 ll_rw_block(READ, 1, bh);
1077 wait_on_buffer(*bh);
1078 return 0;
1079 }
1080
1081 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */
1082 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb)
1083 {
1084 int status;
1085
1086 /* XXX hold a ref on the node while mounte? easy enough, if
1087 * desirable. */
1088 if (ocfs2_mount_local(osb))
1089 osb->node_num = 0;
1090 else
1091 osb->node_num = o2nm_this_node();
1092
1093 if (osb->node_num == O2NM_MAX_NODES) {
1094 mlog(ML_ERROR, "could not find this host's node number\n");
1095 status = -ENOENT;
1096 goto bail;
1097 }
1098
1099 mlog(0, "I am node %d\n", osb->node_num);
1100
1101 status = 0;
1102 bail:
1103 return status;
1104 }
1105
1106 static int ocfs2_mount_volume(struct super_block *sb)
1107 {
1108 int status = 0;
1109 int unlock_super = 0;
1110 struct ocfs2_super *osb = OCFS2_SB(sb);
1111
1112 mlog_entry_void();
1113
1114 if (ocfs2_is_hard_readonly(osb))
1115 goto leave;
1116
1117 status = ocfs2_fill_local_node_info(osb);
1118 if (status < 0) {
1119 mlog_errno(status);
1120 goto leave;
1121 }
1122
1123 status = ocfs2_register_hb_callbacks(osb);
1124 if (status < 0) {
1125 mlog_errno(status);
1126 goto leave;
1127 }
1128
1129 status = ocfs2_dlm_init(osb);
1130 if (status < 0) {
1131 mlog_errno(status);
1132 goto leave;
1133 }
1134
1135 /* requires vote_thread to be running. */
1136 status = ocfs2_register_net_handlers(osb);
1137 if (status < 0) {
1138 mlog_errno(status);
1139 goto leave;
1140 }
1141
1142 status = ocfs2_super_lock(osb, 1);
1143 if (status < 0) {
1144 mlog_errno(status);
1145 goto leave;
1146 }
1147 unlock_super = 1;
1148
1149 /* This will load up the node map and add ourselves to it. */
1150 status = ocfs2_find_slot(osb);
1151 if (status < 0) {
1152 mlog_errno(status);
1153 goto leave;
1154 }
1155
1156 ocfs2_populate_mounted_map(osb);
1157
1158 /* load all node-local system inodes */
1159 status = ocfs2_init_local_system_inodes(osb);
1160 if (status < 0) {
1161 mlog_errno(status);
1162 goto leave;
1163 }
1164
1165 status = ocfs2_check_volume(osb);
1166 if (status < 0) {
1167 mlog_errno(status);
1168 goto leave;
1169 }
1170
1171 status = ocfs2_truncate_log_init(osb);
1172 if (status < 0) {
1173 mlog_errno(status);
1174 goto leave;
1175 }
1176
1177 if (ocfs2_mount_local(osb))
1178 goto leave;
1179
1180 /* This should be sent *after* we recovered our journal as it
1181 * will cause other nodes to unmark us as needing
1182 * recovery. However, we need to send it *before* dropping the
1183 * super block lock as otherwise their recovery threads might
1184 * try to clean us up while we're live! */
1185 status = ocfs2_request_mount_vote(osb);
1186 if (status < 0)
1187 mlog_errno(status);
1188
1189 leave:
1190 if (unlock_super)
1191 ocfs2_super_unlock(osb, 1);
1192
1193 mlog_exit(status);
1194 return status;
1195 }
1196
1197 /* we can't grab the goofy sem lock from inside wait_event, so we use
1198 * memory barriers to make sure that we'll see the null task before
1199 * being woken up */
1200 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
1201 {
1202 mb();
1203 return osb->recovery_thread_task != NULL;
1204 }
1205
1206 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1207 {
1208 int tmp;
1209 struct ocfs2_super *osb = NULL;
1210 char nodestr[8];
1211
1212 mlog_entry("(0x%p)\n", sb);
1213
1214 BUG_ON(!sb);
1215 osb = OCFS2_SB(sb);
1216 BUG_ON(!osb);
1217
1218 ocfs2_shutdown_local_alloc(osb);
1219
1220 ocfs2_truncate_log_shutdown(osb);
1221
1222 /* disable any new recovery threads and wait for any currently
1223 * running ones to exit. Do this before setting the vol_state. */
1224 mutex_lock(&osb->recovery_lock);
1225 osb->disable_recovery = 1;
1226 mutex_unlock(&osb->recovery_lock);
1227 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
1228
1229 /* At this point, we know that no more recovery threads can be
1230 * launched, so wait for any recovery completion work to
1231 * complete. */
1232 flush_workqueue(ocfs2_wq);
1233
1234 ocfs2_journal_shutdown(osb);
1235
1236 ocfs2_sync_blockdev(sb);
1237
1238 /* No dlm means we've failed during mount, so skip all the
1239 * steps which depended on that to complete. */
1240 if (osb->dlm) {
1241 tmp = ocfs2_super_lock(osb, 1);
1242 if (tmp < 0) {
1243 mlog_errno(tmp);
1244 return;
1245 }
1246
1247 tmp = ocfs2_request_umount_vote(osb);
1248 if (tmp < 0)
1249 mlog_errno(tmp);
1250 }
1251
1252 if (osb->slot_num != OCFS2_INVALID_SLOT)
1253 ocfs2_put_slot(osb);
1254
1255 if (osb->dlm)
1256 ocfs2_super_unlock(osb, 1);
1257
1258 ocfs2_release_system_inodes(osb);
1259
1260 if (osb->dlm) {
1261 ocfs2_unregister_net_handlers(osb);
1262
1263 ocfs2_dlm_shutdown(osb);
1264 }
1265
1266 ocfs2_clear_hb_callbacks(osb);
1267
1268 debugfs_remove(osb->osb_debug_root);
1269
1270 if (!mnt_err)
1271 ocfs2_stop_heartbeat(osb);
1272
1273 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1274
1275 if (ocfs2_mount_local(osb))
1276 snprintf(nodestr, sizeof(nodestr), "local");
1277 else
1278 snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num);
1279
1280 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1281 osb->dev_str, nodestr);
1282
1283 ocfs2_delete_osb(osb);
1284 kfree(osb);
1285 sb->s_dev = 0;
1286 sb->s_fs_info = NULL;
1287 }
1288
1289 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1290 unsigned uuid_bytes)
1291 {
1292 int i, ret;
1293 char *ptr;
1294
1295 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1296
1297 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1298 if (osb->uuid_str == NULL)
1299 return -ENOMEM;
1300
1301 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1302 /* print with null */
1303 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1304 if (ret != 2) /* drop super cleans up */
1305 return -EINVAL;
1306 /* then only advance past the last char */
1307 ptr += 2;
1308 }
1309
1310 return 0;
1311 }
1312
1313 static int ocfs2_initialize_super(struct super_block *sb,
1314 struct buffer_head *bh,
1315 int sector_size)
1316 {
1317 int status = 0;
1318 int i, cbits, bbits;
1319 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1320 struct inode *inode = NULL;
1321 struct buffer_head *bitmap_bh = NULL;
1322 struct ocfs2_journal *journal;
1323 __le32 uuid_net_key;
1324 struct ocfs2_super *osb;
1325
1326 mlog_entry_void();
1327
1328 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1329 if (!osb) {
1330 status = -ENOMEM;
1331 mlog_errno(status);
1332 goto bail;
1333 }
1334
1335 sb->s_fs_info = osb;
1336 sb->s_op = &ocfs2_sops;
1337 sb->s_export_op = &ocfs2_export_ops;
1338 sb->s_time_gran = 1;
1339 sb->s_flags |= MS_NOATIME;
1340 /* this is needed to support O_LARGEFILE */
1341 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1342 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1343 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1344
1345 osb->sb = sb;
1346 /* Save off for ocfs2_rw_direct */
1347 osb->s_sectsize_bits = blksize_bits(sector_size);
1348 BUG_ON(!osb->s_sectsize_bits);
1349
1350 osb->net_response_ids = 0;
1351 spin_lock_init(&osb->net_response_lock);
1352 INIT_LIST_HEAD(&osb->net_response_list);
1353
1354 INIT_LIST_HEAD(&osb->osb_net_handlers);
1355 init_waitqueue_head(&osb->recovery_event);
1356 spin_lock_init(&osb->vote_task_lock);
1357 init_waitqueue_head(&osb->vote_event);
1358 osb->vote_work_sequence = 0;
1359 osb->vote_wake_sequence = 0;
1360 INIT_LIST_HEAD(&osb->blocked_lock_list);
1361 osb->blocked_lock_count = 0;
1362 INIT_LIST_HEAD(&osb->vote_list);
1363 spin_lock_init(&osb->osb_lock);
1364
1365 atomic_set(&osb->alloc_stats.moves, 0);
1366 atomic_set(&osb->alloc_stats.local_data, 0);
1367 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1368 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1369 atomic_set(&osb->alloc_stats.bg_extends, 0);
1370
1371 ocfs2_init_node_maps(osb);
1372
1373 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1374 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1375
1376 mutex_init(&osb->recovery_lock);
1377
1378 osb->disable_recovery = 0;
1379 osb->recovery_thread_task = NULL;
1380
1381 init_waitqueue_head(&osb->checkpoint_event);
1382 atomic_set(&osb->needs_checkpoint, 0);
1383
1384 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1385
1386 osb->node_num = O2NM_INVALID_NODE_NUM;
1387 osb->slot_num = OCFS2_INVALID_SLOT;
1388
1389 osb->local_alloc_state = OCFS2_LA_UNUSED;
1390 osb->local_alloc_bh = NULL;
1391
1392 ocfs2_setup_hb_callbacks(osb);
1393
1394 init_waitqueue_head(&osb->osb_mount_event);
1395
1396 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1397 if (!osb->vol_label) {
1398 mlog(ML_ERROR, "unable to alloc vol label\n");
1399 status = -ENOMEM;
1400 goto bail;
1401 }
1402
1403 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1404 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1405 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1406 osb->max_slots);
1407 status = -EINVAL;
1408 goto bail;
1409 }
1410 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1411
1412 init_waitqueue_head(&osb->osb_wipe_event);
1413 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1414 sizeof(*osb->osb_orphan_wipes),
1415 GFP_KERNEL);
1416 if (!osb->osb_orphan_wipes) {
1417 status = -ENOMEM;
1418 mlog_errno(status);
1419 goto bail;
1420 }
1421
1422 osb->s_feature_compat =
1423 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1424 osb->s_feature_ro_compat =
1425 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1426 osb->s_feature_incompat =
1427 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1428
1429 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1430 mlog(ML_ERROR, "couldn't mount because of unsupported "
1431 "optional features (%x).\n", i);
1432 status = -EINVAL;
1433 goto bail;
1434 }
1435 if (!(osb->sb->s_flags & MS_RDONLY) &&
1436 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1437 mlog(ML_ERROR, "couldn't mount RDWR because of "
1438 "unsupported optional features (%x).\n", i);
1439 status = -EINVAL;
1440 goto bail;
1441 }
1442
1443 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1444
1445 /* FIXME
1446 * This should be done in ocfs2_journal_init(), but unknown
1447 * ordering issues will cause the filesystem to crash.
1448 * If anyone wants to figure out what part of the code
1449 * refers to osb->journal before ocfs2_journal_init() is run,
1450 * be my guest.
1451 */
1452 /* initialize our journal structure */
1453
1454 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
1455 if (!journal) {
1456 mlog(ML_ERROR, "unable to alloc journal\n");
1457 status = -ENOMEM;
1458 goto bail;
1459 }
1460 osb->journal = journal;
1461 journal->j_osb = osb;
1462
1463 atomic_set(&journal->j_num_trans, 0);
1464 init_rwsem(&journal->j_trans_barrier);
1465 init_waitqueue_head(&journal->j_checkpointed);
1466 spin_lock_init(&journal->j_lock);
1467 journal->j_trans_id = (unsigned long) 1;
1468 INIT_LIST_HEAD(&journal->j_la_cleanups);
1469 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1470 journal->j_state = OCFS2_JOURNAL_FREE;
1471
1472 /* get some pseudo constants for clustersize bits */
1473 osb->s_clustersize_bits =
1474 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1475 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1476 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1477
1478 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1479 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1480 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1481 osb->s_clustersize);
1482 status = -EINVAL;
1483 goto bail;
1484 }
1485
1486 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1487 > (u32)~0UL) {
1488 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1489 "what jbd can address in 32 bits.\n");
1490 status = -EINVAL;
1491 goto bail;
1492 }
1493
1494 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1495 sizeof(di->id2.i_super.s_uuid))) {
1496 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1497 status = -ENOMEM;
1498 goto bail;
1499 }
1500
1501 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1502 osb->net_key = le32_to_cpu(uuid_net_key);
1503
1504 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1505 osb->vol_label[63] = '\0';
1506 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1507 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1508 osb->first_cluster_group_blkno =
1509 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1510 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1511 mlog(0, "vol_label: %s\n", osb->vol_label);
1512 mlog(0, "uuid: %s\n", osb->uuid_str);
1513 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1514 (unsigned long long)osb->root_blkno,
1515 (unsigned long long)osb->system_dir_blkno);
1516
1517 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1518 if (!osb->osb_dlm_debug) {
1519 status = -ENOMEM;
1520 mlog_errno(status);
1521 goto bail;
1522 }
1523
1524 atomic_set(&osb->vol_state, VOLUME_INIT);
1525
1526 /* load root, system_dir, and all global system inodes */
1527 status = ocfs2_init_global_system_inodes(osb);
1528 if (status < 0) {
1529 mlog_errno(status);
1530 goto bail;
1531 }
1532
1533 /*
1534 * global bitmap
1535 */
1536 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1537 OCFS2_INVALID_SLOT);
1538 if (!inode) {
1539 status = -EINVAL;
1540 mlog_errno(status);
1541 goto bail;
1542 }
1543
1544 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1545
1546 /* We don't have a cluster lock on the bitmap here because
1547 * we're only interested in static information and the extra
1548 * complexity at mount time isn't worht it. Don't pass the
1549 * inode in to the read function though as we don't want it to
1550 * be put in the cache. */
1551 status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0,
1552 NULL);
1553 iput(inode);
1554 if (status < 0) {
1555 mlog_errno(status);
1556 goto bail;
1557 }
1558
1559 di = (struct ocfs2_dinode *) bitmap_bh->b_data;
1560 osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
1561 brelse(bitmap_bh);
1562 mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n",
1563 (unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg);
1564
1565 status = ocfs2_init_slot_info(osb);
1566 if (status < 0) {
1567 mlog_errno(status);
1568 goto bail;
1569 }
1570
1571 bail:
1572 mlog_exit(status);
1573 return status;
1574 }
1575
1576 /*
1577 * will return: -EAGAIN if it is ok to keep searching for superblocks
1578 * -EINVAL if there is a bad superblock
1579 * 0 on success
1580 */
1581 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1582 struct buffer_head *bh,
1583 u32 blksz)
1584 {
1585 int status = -EAGAIN;
1586
1587 mlog_entry_void();
1588
1589 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1590 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1591 status = -EINVAL;
1592 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1593 mlog(ML_ERROR, "found superblock with incorrect block "
1594 "size: found %u, should be %u\n",
1595 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1596 blksz);
1597 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1598 OCFS2_MAJOR_REV_LEVEL ||
1599 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1600 OCFS2_MINOR_REV_LEVEL) {
1601 mlog(ML_ERROR, "found superblock with bad version: "
1602 "found %u.%u, should be %u.%u\n",
1603 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1604 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1605 OCFS2_MAJOR_REV_LEVEL,
1606 OCFS2_MINOR_REV_LEVEL);
1607 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1608 mlog(ML_ERROR, "bad block number on superblock: "
1609 "found %llu, should be %llu\n",
1610 (unsigned long long)le64_to_cpu(di->i_blkno),
1611 (unsigned long long)bh->b_blocknr);
1612 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1613 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1614 mlog(ML_ERROR, "bad cluster size found: %u\n",
1615 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1616 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1617 mlog(ML_ERROR, "bad root_blkno: 0\n");
1618 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1619 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1620 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1621 mlog(ML_ERROR,
1622 "Superblock slots found greater than file system "
1623 "maximum: found %u, max %u\n",
1624 le16_to_cpu(di->id2.i_super.s_max_slots),
1625 OCFS2_MAX_SLOTS);
1626 } else {
1627 /* found it! */
1628 status = 0;
1629 }
1630 }
1631
1632 mlog_exit(status);
1633 return status;
1634 }
1635
1636 static int ocfs2_check_volume(struct ocfs2_super *osb)
1637 {
1638 int status = 0;
1639 int dirty;
1640 int local;
1641 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1642 * recover
1643 * ourselves. */
1644
1645 mlog_entry_void();
1646
1647 /* Init our journal object. */
1648 status = ocfs2_journal_init(osb->journal, &dirty);
1649 if (status < 0) {
1650 mlog(ML_ERROR, "Could not initialize journal!\n");
1651 goto finally;
1652 }
1653
1654 /* If the journal was unmounted cleanly then we don't want to
1655 * recover anything. Otherwise, journal_load will do that
1656 * dirty work for us :) */
1657 if (!dirty) {
1658 status = ocfs2_journal_wipe(osb->journal, 0);
1659 if (status < 0) {
1660 mlog_errno(status);
1661 goto finally;
1662 }
1663 } else {
1664 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1665 "recovering volume.\n");
1666 }
1667
1668 local = ocfs2_mount_local(osb);
1669
1670 /* will play back anything left in the journal. */
1671 ocfs2_journal_load(osb->journal, local);
1672
1673 if (dirty) {
1674 /* recover my local alloc if we didn't unmount cleanly. */
1675 status = ocfs2_begin_local_alloc_recovery(osb,
1676 osb->slot_num,
1677 &local_alloc);
1678 if (status < 0) {
1679 mlog_errno(status);
1680 goto finally;
1681 }
1682 /* we complete the recovery process after we've marked
1683 * ourselves as mounted. */
1684 }
1685
1686 mlog(0, "Journal loaded.\n");
1687
1688 status = ocfs2_load_local_alloc(osb);
1689 if (status < 0) {
1690 mlog_errno(status);
1691 goto finally;
1692 }
1693
1694 if (dirty) {
1695 /* Recovery will be completed after we've mounted the
1696 * rest of the volume. */
1697 osb->dirty = 1;
1698 osb->local_alloc_copy = local_alloc;
1699 local_alloc = NULL;
1700 }
1701
1702 /* go through each journal, trylock it and if you get the
1703 * lock, and it's marked as dirty, set the bit in the recover
1704 * map and launch a recovery thread for it. */
1705 status = ocfs2_mark_dead_nodes(osb);
1706 if (status < 0)
1707 mlog_errno(status);
1708
1709 finally:
1710 if (local_alloc)
1711 kfree(local_alloc);
1712
1713 mlog_exit(status);
1714 return status;
1715 }
1716
1717 /*
1718 * The routine gets called from dismount or close whenever a dismount on
1719 * volume is requested and the osb open count becomes 1.
1720 * It will remove the osb from the global list and also free up all the
1721 * initialized resources and fileobject.
1722 */
1723 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1724 {
1725 mlog_entry_void();
1726
1727 /* This function assumes that the caller has the main osb resource */
1728
1729 if (osb->slot_info)
1730 ocfs2_free_slot_info(osb->slot_info);
1731
1732 kfree(osb->osb_orphan_wipes);
1733 /* FIXME
1734 * This belongs in journal shutdown, but because we have to
1735 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1736 * we free it here.
1737 */
1738 kfree(osb->journal);
1739 if (osb->local_alloc_copy)
1740 kfree(osb->local_alloc_copy);
1741 kfree(osb->uuid_str);
1742 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1743 memset(osb, 0, sizeof(struct ocfs2_super));
1744
1745 mlog_exit_void();
1746 }
1747
1748 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1749 * panic(). We do not support continue-on-error operation. */
1750 static void ocfs2_handle_error(struct super_block *sb)
1751 {
1752 struct ocfs2_super *osb = OCFS2_SB(sb);
1753
1754 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1755 panic("OCFS2: (device %s): panic forced after error\n",
1756 sb->s_id);
1757
1758 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1759
1760 if (sb->s_flags & MS_RDONLY &&
1761 (ocfs2_is_soft_readonly(osb) ||
1762 ocfs2_is_hard_readonly(osb)))
1763 return;
1764
1765 printk(KERN_CRIT "File system is now read-only due to the potential "
1766 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1767 "system is unmounted.\n");
1768 sb->s_flags |= MS_RDONLY;
1769 ocfs2_set_ro_flag(osb, 0);
1770 }
1771
1772 static char error_buf[1024];
1773
1774 void __ocfs2_error(struct super_block *sb,
1775 const char *function,
1776 const char *fmt, ...)
1777 {
1778 va_list args;
1779
1780 va_start(args, fmt);
1781 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1782 va_end(args);
1783
1784 /* Not using mlog here because we want to show the actual
1785 * function the error came from. */
1786 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1787 sb->s_id, function, error_buf);
1788
1789 ocfs2_handle_error(sb);
1790 }
1791
1792 /* Handle critical errors. This is intentionally more drastic than
1793 * ocfs2_handle_error, so we only use for things like journal errors,
1794 * etc. */
1795 void __ocfs2_abort(struct super_block* sb,
1796 const char *function,
1797 const char *fmt, ...)
1798 {
1799 va_list args;
1800
1801 va_start(args, fmt);
1802 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1803 va_end(args);
1804
1805 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1806 sb->s_id, function, error_buf);
1807
1808 /* We don't have the cluster support yet to go straight to
1809 * hard readonly in here. Until then, we want to keep
1810 * ocfs2_abort() so that we can at least mark critical
1811 * errors.
1812 *
1813 * TODO: This should abort the journal and alert other nodes
1814 * that our slot needs recovery. */
1815
1816 /* Force a panic(). This stinks, but it's better than letting
1817 * things continue without having a proper hard readonly
1818 * here. */
1819 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1820 ocfs2_handle_error(sb);
1821 }
1822
1823 module_init(ocfs2_init);
1824 module_exit(ocfs2_exit);
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