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[PATCH] Hugetlb: Remove duplicate i_size check
[pv_ops_mirror.git] / fs / ocfs2 / super.c
blob48bf7f0ce5443d69879d4f44241266433267ae1a
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
43 #include <cluster/nodemanager.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 #include "vote.h"
68
69 #include "buffer_head_io.h"
70
71 /*
72 * Globals
73 */
74 static spinlock_t ocfs2_globals_lock = SPIN_LOCK_UNLOCKED;
75
76 static u32 osb_id; /* Keeps track of next available OSB Id */
77
78 static kmem_cache_t *ocfs2_inode_cachep = NULL;
79
80 kmem_cache_t *ocfs2_lock_cache = NULL;
81
82 /* OCFS2 needs to schedule several differnt types of work which
83 * require cluster locking, disk I/O, recovery waits, etc. Since these
84 * types of work tend to be heavy we avoid using the kernel events
85 * workqueue and schedule on our own. */
86 struct workqueue_struct *ocfs2_wq = NULL;
87
88 static struct dentry *ocfs2_debugfs_root = NULL;
89
90 MODULE_AUTHOR("Oracle");
91 MODULE_LICENSE("GPL");
92
93 static int ocfs2_parse_options(struct super_block *sb, char *options,
94 unsigned long *mount_opt, int is_remount);
95 static void ocfs2_put_super(struct super_block *sb);
96 static int ocfs2_mount_volume(struct super_block *sb);
97 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
98 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
99 static int ocfs2_initialize_mem_caches(void);
100 static void ocfs2_free_mem_caches(void);
101 static void ocfs2_delete_osb(struct ocfs2_super *osb);
102
103 static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf);
104
105 static int ocfs2_sync_fs(struct super_block *sb, int wait);
106
107 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
108 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
109 static int ocfs2_release_system_inodes(struct ocfs2_super *osb);
110 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb);
111 static int ocfs2_check_volume(struct ocfs2_super *osb);
112 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
113 struct buffer_head *bh,
114 u32 sectsize);
115 static int ocfs2_initialize_super(struct super_block *sb,
116 struct buffer_head *bh,
117 int sector_size);
118 static int ocfs2_get_sector(struct super_block *sb,
119 struct buffer_head **bh,
120 int block,
121 int sect_size);
122 static void ocfs2_write_super(struct super_block *sb);
123 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
124 static void ocfs2_destroy_inode(struct inode *inode);
125
126 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
127
128 static struct super_operations ocfs2_sops = {
129 .statfs = ocfs2_statfs,
130 .alloc_inode = ocfs2_alloc_inode,
131 .destroy_inode = ocfs2_destroy_inode,
132 .drop_inode = ocfs2_drop_inode,
133 .clear_inode = ocfs2_clear_inode,
134 .delete_inode = ocfs2_delete_inode,
135 .sync_fs = ocfs2_sync_fs,
136 .write_super = ocfs2_write_super,
137 .put_super = ocfs2_put_super,
138 .remount_fs = ocfs2_remount,
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_err,
152 };
153
154 static match_table_t tokens = {
155 {Opt_barrier, "barrier=%u"},
156 {Opt_err_panic, "errors=panic"},
157 {Opt_err_ro, "errors=remount-ro"},
158 {Opt_intr, "intr"},
159 {Opt_nointr, "nointr"},
160 {Opt_hb_none, OCFS2_HB_NONE},
161 {Opt_hb_local, OCFS2_HB_LOCAL},
162 {Opt_data_ordered, "data=ordered"},
163 {Opt_data_writeback, "data=writeback"},
164 {Opt_err, NULL}
165 };
166
167 /*
168 * write_super and sync_fs ripped right out of ext3.
169 */
170 static void ocfs2_write_super(struct super_block *sb)
171 {
172 if (down_trylock(&sb->s_lock) == 0)
173 BUG();
174 sb->s_dirt = 0;
175 }
176
177 static int ocfs2_sync_fs(struct super_block *sb, int wait)
178 {
179 int status = 0;
180 tid_t target;
181 struct ocfs2_super *osb = OCFS2_SB(sb);
182
183 sb->s_dirt = 0;
184
185 if (ocfs2_is_hard_readonly(osb))
186 return -EROFS;
187
188 if (wait) {
189 status = ocfs2_flush_truncate_log(osb);
190 if (status < 0)
191 mlog_errno(status);
192 } else {
193 ocfs2_schedule_truncate_log_flush(osb, 0);
194 }
195
196 if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) {
197 if (wait)
198 log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
199 target);
200 }
201 return 0;
202 }
203
204 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
205 {
206 struct inode *new = NULL;
207 int status = 0;
208 int i;
209
210 mlog_entry_void();
211
212 new = ocfs2_iget(osb, osb->root_blkno);
213 if (IS_ERR(new)) {
214 status = PTR_ERR(new);
215 mlog_errno(status);
216 goto bail;
217 }
218 osb->root_inode = new;
219
220 new = ocfs2_iget(osb, osb->system_dir_blkno);
221 if (IS_ERR(new)) {
222 status = PTR_ERR(new);
223 mlog_errno(status);
224 goto bail;
225 }
226 osb->sys_root_inode = new;
227
228 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
229 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
230 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
231 if (!new) {
232 ocfs2_release_system_inodes(osb);
233 status = -EINVAL;
234 mlog_errno(status);
235 /* FIXME: Should ERROR_RO_FS */
236 mlog(ML_ERROR, "Unable to load system inode %d, "
237 "possibly corrupt fs?", i);
238 goto bail;
239 }
240 // the array now has one ref, so drop this one
241 iput(new);
242 }
243
244 bail:
245 mlog_exit(status);
246 return status;
247 }
248
249 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
250 {
251 struct inode *new = NULL;
252 int status = 0;
253 int i;
254
255 mlog_entry_void();
256
257 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
258 i < NUM_SYSTEM_INODES;
259 i++) {
260 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
261 if (!new) {
262 ocfs2_release_system_inodes(osb);
263 status = -EINVAL;
264 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
265 status, i, osb->slot_num);
266 goto bail;
267 }
268 /* the array now has one ref, so drop this one */
269 iput(new);
270 }
271
272 bail:
273 mlog_exit(status);
274 return status;
275 }
276
277 static int ocfs2_release_system_inodes(struct ocfs2_super *osb)
278 {
279 int status = 0, i;
280 struct inode *inode;
281
282 mlog_entry_void();
283
284 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
285 inode = osb->system_inodes[i];
286 if (inode) {
287 iput(inode);
288 osb->system_inodes[i] = NULL;
289 }
290 }
291
292 inode = osb->sys_root_inode;
293 if (inode) {
294 iput(inode);
295 osb->sys_root_inode = NULL;
296 }
297
298 inode = osb->root_inode;
299 if (inode) {
300 iput(inode);
301 osb->root_inode = NULL;
302 }
303
304 mlog_exit(status);
305 return status;
306 }
307
308 /* We're allocating fs objects, use GFP_NOFS */
309 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
310 {
311 struct ocfs2_inode_info *oi;
312
313 oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS);
314 if (!oi)
315 return NULL;
316
317 return &oi->vfs_inode;
318 }
319
320 static void ocfs2_destroy_inode(struct inode *inode)
321 {
322 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
323 }
324
325 /* From xfs_super.c:xfs_max_file_offset
326 * Copyright (c) 2000-2004 Silicon Graphics, Inc.
327 */
328 static unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
329 {
330 unsigned int pagefactor = 1;
331 unsigned int bitshift = BITS_PER_LONG - 1;
332
333 /* Figure out maximum filesize, on Linux this can depend on
334 * the filesystem blocksize (on 32 bit platforms).
335 * __block_prepare_write does this in an [unsigned] long...
336 * page->index << (PAGE_CACHE_SHIFT - bbits)
337 * So, for page sized blocks (4K on 32 bit platforms),
338 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
339 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
340 * but for smaller blocksizes it is less (bbits = log2 bsize).
341 * Note1: get_block_t takes a long (implicit cast from above)
342 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
343 * can optionally convert the [unsigned] long from above into
344 * an [unsigned] long long.
345 */
346
347 #if BITS_PER_LONG == 32
348 # if defined(CONFIG_LBD)
349 BUG_ON(sizeof(sector_t) != 8);
350 pagefactor = PAGE_CACHE_SIZE;
351 bitshift = BITS_PER_LONG;
352 # else
353 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
354 # endif
355 #endif
356
357 return (((unsigned long long)pagefactor) << bitshift) - 1;
358 }
359
360 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
361 {
362 int incompat_features;
363 int ret = 0;
364 unsigned long parsed_options;
365 struct ocfs2_super *osb = OCFS2_SB(sb);
366
367 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
368 ret = -EINVAL;
369 goto out;
370 }
371
372 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
373 (parsed_options & OCFS2_MOUNT_HB_LOCAL)) {
374 ret = -EINVAL;
375 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
376 goto out;
377 }
378
379 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
380 (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) {
381 ret = -EINVAL;
382 mlog(ML_ERROR, "Cannot change data mode on remount\n");
383 goto out;
384 }
385
386 /* We're going to/from readonly mode. */
387 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
388 /* Lock here so the check of HARD_RO and the potential
389 * setting of SOFT_RO is atomic. */
390 spin_lock(&osb->osb_lock);
391 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
392 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
393 ret = -EROFS;
394 goto unlock_osb;
395 }
396
397 if (*flags & MS_RDONLY) {
398 mlog(0, "Going to ro mode.\n");
399 sb->s_flags |= MS_RDONLY;
400 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
401 } else {
402 mlog(0, "Making ro filesystem writeable.\n");
403
404 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
405 mlog(ML_ERROR, "Cannot remount RDWR "
406 "filesystem due to previous errors.\n");
407 ret = -EROFS;
408 goto unlock_osb;
409 }
410 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
411 if (incompat_features) {
412 mlog(ML_ERROR, "Cannot remount RDWR because "
413 "of unsupported optional features "
414 "(%x).\n", incompat_features);
415 ret = -EINVAL;
416 goto unlock_osb;
417 }
418 sb->s_flags &= ~MS_RDONLY;
419 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
420 }
421 unlock_osb:
422 spin_unlock(&osb->osb_lock);
423 }
424
425 if (!ret) {
426 if (!ocfs2_is_hard_readonly(osb))
427 ocfs2_set_journal_params(osb);
428
429 /* Only save off the new mount options in case of a successful
430 * remount. */
431 osb->s_mount_opt = parsed_options;
432 }
433 out:
434 return ret;
435 }
436
437 static int ocfs2_sb_probe(struct super_block *sb,
438 struct buffer_head **bh,
439 int *sector_size)
440 {
441 int status = 0, tmpstat;
442 struct ocfs1_vol_disk_hdr *hdr;
443 struct ocfs2_dinode *di;
444 int blksize;
445
446 *bh = NULL;
447
448 /* may be > 512 */
449 *sector_size = bdev_hardsect_size(sb->s_bdev);
450 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
451 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
452 *sector_size, OCFS2_MAX_BLOCKSIZE);
453 status = -EINVAL;
454 goto bail;
455 }
456
457 /* Can this really happen? */
458 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
459 *sector_size = OCFS2_MIN_BLOCKSIZE;
460
461 /* check block zero for old format */
462 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
463 if (status < 0) {
464 mlog_errno(status);
465 goto bail;
466 }
467 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
468 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
469 mlog(ML_ERROR, "incompatible version: %u.%u\n",
470 hdr->major_version, hdr->minor_version);
471 status = -EINVAL;
472 }
473 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
474 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
475 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
476 hdr->signature);
477 status = -EINVAL;
478 }
479 brelse(*bh);
480 *bh = NULL;
481 if (status < 0) {
482 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
483 "upgraded before mounting with ocfs v2\n");
484 goto bail;
485 }
486
487 /*
488 * Now check at magic offset for 512, 1024, 2048, 4096
489 * blocksizes. 4096 is the maximum blocksize because it is
490 * the minimum clustersize.
491 */
492 status = -EINVAL;
493 for (blksize = *sector_size;
494 blksize <= OCFS2_MAX_BLOCKSIZE;
495 blksize <<= 1) {
496 tmpstat = ocfs2_get_sector(sb, bh,
497 OCFS2_SUPER_BLOCK_BLKNO,
498 blksize);
499 if (tmpstat < 0) {
500 status = tmpstat;
501 mlog_errno(status);
502 goto bail;
503 }
504 di = (struct ocfs2_dinode *) (*bh)->b_data;
505 status = ocfs2_verify_volume(di, *bh, blksize);
506 if (status >= 0)
507 goto bail;
508 brelse(*bh);
509 *bh = NULL;
510 if (status != -EAGAIN)
511 break;
512 }
513
514 bail:
515 return status;
516 }
517
518 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
519 {
520 struct dentry *root;
521 int status, sector_size;
522 unsigned long parsed_opt;
523 struct inode *inode = NULL;
524 struct ocfs2_super *osb = NULL;
525 struct buffer_head *bh = NULL;
526
527 mlog_entry("%p, %p, %i", sb, data, silent);
528
529 /* for now we only have one cluster/node, make sure we see it
530 * in the heartbeat universe */
531 if (!o2hb_check_local_node_heartbeating()) {
532 status = -EINVAL;
533 goto read_super_error;
534 }
535
536 /* probe for superblock */
537 status = ocfs2_sb_probe(sb, &bh, &sector_size);
538 if (status < 0) {
539 mlog(ML_ERROR, "superblock probe failed!\n");
540 goto read_super_error;
541 }
542
543 status = ocfs2_initialize_super(sb, bh, sector_size);
544 osb = OCFS2_SB(sb);
545 if (status < 0) {
546 mlog_errno(status);
547 goto read_super_error;
548 }
549 brelse(bh);
550 bh = NULL;
551
552 if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) {
553 status = -EINVAL;
554 goto read_super_error;
555 }
556 osb->s_mount_opt = parsed_opt;
557
558 sb->s_magic = OCFS2_SUPER_MAGIC;
559
560 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
561 * heartbeat=none */
562 if (bdev_read_only(sb->s_bdev)) {
563 if (!(sb->s_flags & MS_RDONLY)) {
564 status = -EACCES;
565 mlog(ML_ERROR, "Readonly device detected but readonly "
566 "mount was not specified.\n");
567 goto read_super_error;
568 }
569
570 /* You should not be able to start a local heartbeat
571 * on a readonly device. */
572 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
573 status = -EROFS;
574 mlog(ML_ERROR, "Local heartbeat specified on readonly "
575 "device.\n");
576 goto read_super_error;
577 }
578
579 status = ocfs2_check_journals_nolocks(osb);
580 if (status < 0) {
581 if (status == -EROFS)
582 mlog(ML_ERROR, "Recovery required on readonly "
583 "file system, but write access is "
584 "unavailable.\n");
585 else
586 mlog_errno(status);
587 goto read_super_error;
588 }
589
590 ocfs2_set_ro_flag(osb, 1);
591
592 printk(KERN_NOTICE "Readonly device detected. No cluster "
593 "services will be utilized for this mount. Recovery "
594 "will be skipped.\n");
595 }
596
597 if (!ocfs2_is_hard_readonly(osb)) {
598 /* If this isn't a hard readonly mount, then we need
599 * to make sure that heartbeat is in a valid state,
600 * and that we mark ourselves soft readonly is -oro
601 * was specified. */
602 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
603 mlog(ML_ERROR, "No heartbeat for device (%s)\n",
604 sb->s_id);
605 status = -EINVAL;
606 goto read_super_error;
607 }
608
609 if (sb->s_flags & MS_RDONLY)
610 ocfs2_set_ro_flag(osb, 0);
611 }
612
613 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
614 ocfs2_debugfs_root);
615 if (!osb->osb_debug_root) {
616 status = -EINVAL;
617 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
618 goto read_super_error;
619 }
620
621 status = ocfs2_mount_volume(sb);
622 if (osb->root_inode)
623 inode = igrab(osb->root_inode);
624
625 if (status < 0)
626 goto read_super_error;
627
628 if (!inode) {
629 status = -EIO;
630 mlog_errno(status);
631 goto read_super_error;
632 }
633
634 root = d_alloc_root(inode);
635 if (!root) {
636 status = -ENOMEM;
637 mlog_errno(status);
638 goto read_super_error;
639 }
640
641 sb->s_root = root;
642
643 ocfs2_complete_mount_recovery(osb);
644
645 printk("ocfs2: Mounting device (%u,%u) on (node %d, slot %d) with %s "
646 "data mode.\n",
647 MAJOR(sb->s_dev), MINOR(sb->s_dev), osb->node_num,
648 osb->slot_num,
649 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
650 "ordered");
651
652 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
653 wake_up(&osb->osb_mount_event);
654
655 mlog_exit(status);
656 return status;
657
658 read_super_error:
659 if (bh != NULL)
660 brelse(bh);
661
662 if (inode)
663 iput(inode);
664
665 if (osb) {
666 atomic_set(&osb->vol_state, VOLUME_DISABLED);
667 wake_up(&osb->osb_mount_event);
668 ocfs2_dismount_volume(sb, 1);
669 }
670
671 mlog_exit(status);
672 return status;
673 }
674
675 static struct super_block *ocfs2_get_sb(struct file_system_type *fs_type,
676 int flags,
677 const char *dev_name,
678 void *data)
679 {
680 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
681 }
682
683 static struct file_system_type ocfs2_fs_type = {
684 .owner = THIS_MODULE,
685 .name = "ocfs2",
686 .get_sb = ocfs2_get_sb, /* is this called when we mount
687 * the fs? */
688 .kill_sb = kill_block_super, /* set to the generic one
689 * right now, but do we
690 * need to change that? */
691 .fs_flags = FS_REQUIRES_DEV,
692 .next = NULL
693 };
694
695 static int ocfs2_parse_options(struct super_block *sb,
696 char *options,
697 unsigned long *mount_opt,
698 int is_remount)
699 {
700 int status;
701 char *p;
702
703 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
704 options ? options : "(none)");
705
706 *mount_opt = 0;
707
708 if (!options) {
709 status = 1;
710 goto bail;
711 }
712
713 while ((p = strsep(&options, ",")) != NULL) {
714 int token, option;
715 substring_t args[MAX_OPT_ARGS];
716
717 if (!*p)
718 continue;
719
720 token = match_token(p, tokens, args);
721 switch (token) {
722 case Opt_hb_local:
723 *mount_opt |= OCFS2_MOUNT_HB_LOCAL;
724 break;
725 case Opt_hb_none:
726 *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
727 break;
728 case Opt_barrier:
729 if (match_int(&args[0], &option)) {
730 status = 0;
731 goto bail;
732 }
733 if (option)
734 *mount_opt |= OCFS2_MOUNT_BARRIER;
735 else
736 *mount_opt &= ~OCFS2_MOUNT_BARRIER;
737 break;
738 case Opt_intr:
739 *mount_opt &= ~OCFS2_MOUNT_NOINTR;
740 break;
741 case Opt_nointr:
742 *mount_opt |= OCFS2_MOUNT_NOINTR;
743 break;
744 case Opt_err_panic:
745 *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
746 break;
747 case Opt_err_ro:
748 *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
749 break;
750 case Opt_data_ordered:
751 *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
752 break;
753 case Opt_data_writeback:
754 *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
755 break;
756 default:
757 mlog(ML_ERROR,
758 "Unrecognized mount option \"%s\" "
759 "or missing value\n", p);
760 status = 0;
761 goto bail;
762 }
763 }
764
765 status = 1;
766
767 bail:
768 mlog_exit(status);
769 return status;
770 }
771
772 static int __init ocfs2_init(void)
773 {
774 int status;
775
776 mlog_entry_void();
777
778 ocfs2_print_version();
779
780 if (init_ocfs2_extent_maps())
781 return -ENOMEM;
782
783 status = init_ocfs2_uptodate_cache();
784 if (status < 0) {
785 mlog_errno(status);
786 goto leave;
787 }
788
789 status = ocfs2_initialize_mem_caches();
790 if (status < 0) {
791 mlog_errno(status);
792 goto leave;
793 }
794
795 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
796 if (!ocfs2_wq) {
797 status = -ENOMEM;
798 goto leave;
799 }
800
801 spin_lock(&ocfs2_globals_lock);
802 osb_id = 0;
803 spin_unlock(&ocfs2_globals_lock);
804
805 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
806 if (!ocfs2_debugfs_root) {
807 status = -EFAULT;
808 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
809 }
810
811 leave:
812 if (status < 0) {
813 ocfs2_free_mem_caches();
814 exit_ocfs2_uptodate_cache();
815 exit_ocfs2_extent_maps();
816 }
817
818 mlog_exit(status);
819
820 if (status >= 0) {
821 return register_filesystem(&ocfs2_fs_type);
822 } else
823 return -1;
824 }
825
826 static void __exit ocfs2_exit(void)
827 {
828 mlog_entry_void();
829
830 if (ocfs2_wq) {
831 flush_workqueue(ocfs2_wq);
832 destroy_workqueue(ocfs2_wq);
833 }
834
835 debugfs_remove(ocfs2_debugfs_root);
836
837 ocfs2_free_mem_caches();
838
839 unregister_filesystem(&ocfs2_fs_type);
840
841 exit_ocfs2_extent_maps();
842
843 exit_ocfs2_uptodate_cache();
844
845 mlog_exit_void();
846 }
847
848 static void ocfs2_put_super(struct super_block *sb)
849 {
850 mlog_entry("(0x%p)\n", sb);
851
852 ocfs2_sync_blockdev(sb);
853 ocfs2_dismount_volume(sb, 0);
854
855 mlog_exit_void();
856 }
857
858 static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
859 {
860 struct ocfs2_super *osb;
861 u32 numbits, freebits;
862 int status;
863 struct ocfs2_dinode *bm_lock;
864 struct buffer_head *bh = NULL;
865 struct inode *inode = NULL;
866
867 mlog_entry("(%p, %p)\n", sb, buf);
868
869 osb = OCFS2_SB(sb);
870
871 inode = ocfs2_get_system_file_inode(osb,
872 GLOBAL_BITMAP_SYSTEM_INODE,
873 OCFS2_INVALID_SLOT);
874 if (!inode) {
875 mlog(ML_ERROR, "failed to get bitmap inode\n");
876 status = -EIO;
877 goto bail;
878 }
879
880 status = ocfs2_meta_lock(inode, NULL, &bh, 0);
881 if (status < 0) {
882 mlog_errno(status);
883 goto bail;
884 }
885
886 bm_lock = (struct ocfs2_dinode *) bh->b_data;
887
888 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
889 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
890
891 buf->f_type = OCFS2_SUPER_MAGIC;
892 buf->f_bsize = sb->s_blocksize;
893 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
894 buf->f_blocks = ((sector_t) numbits) *
895 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
896 buf->f_bfree = ((sector_t) freebits) *
897 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
898 buf->f_bavail = buf->f_bfree;
899 buf->f_files = numbits;
900 buf->f_ffree = freebits;
901
902 brelse(bh);
903
904 ocfs2_meta_unlock(inode, 0);
905 status = 0;
906 bail:
907 if (inode)
908 iput(inode);
909
910 mlog_exit(status);
911
912 return status;
913 }
914
915 static void ocfs2_inode_init_once(void *data,
916 kmem_cache_t *cachep,
917 unsigned long flags)
918 {
919 struct ocfs2_inode_info *oi = data;
920
921 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
922 SLAB_CTOR_CONSTRUCTOR) {
923 oi->ip_flags = 0;
924 oi->ip_open_count = 0;
925 spin_lock_init(&oi->ip_lock);
926 ocfs2_extent_map_init(&oi->vfs_inode);
927 INIT_LIST_HEAD(&oi->ip_handle_list);
928 INIT_LIST_HEAD(&oi->ip_io_markers);
929 oi->ip_handle = NULL;
930 oi->ip_created_trans = 0;
931 oi->ip_last_trans = 0;
932 oi->ip_dir_start_lookup = 0;
933
934 init_rwsem(&oi->ip_alloc_sem);
935 init_MUTEX(&(oi->ip_io_sem));
936
937 oi->ip_blkno = 0ULL;
938 oi->ip_clusters = 0;
939
940 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
941 ocfs2_lock_res_init_once(&oi->ip_meta_lockres);
942 ocfs2_lock_res_init_once(&oi->ip_data_lockres);
943
944 ocfs2_metadata_cache_init(&oi->vfs_inode);
945
946 inode_init_once(&oi->vfs_inode);
947 }
948 }
949
950 static int ocfs2_initialize_mem_caches(void)
951 {
952 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
953 sizeof(struct ocfs2_inode_info),
954 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
955 ocfs2_inode_init_once, NULL);
956 if (!ocfs2_inode_cachep)
957 return -ENOMEM;
958
959 ocfs2_lock_cache = kmem_cache_create("ocfs2_lock",
960 sizeof(struct ocfs2_journal_lock),
961 0,
962 SLAB_NO_REAP|SLAB_HWCACHE_ALIGN,
963 NULL, NULL);
964 if (!ocfs2_lock_cache)
965 return -ENOMEM;
966
967 return 0;
968 }
969
970 static void ocfs2_free_mem_caches(void)
971 {
972 if (ocfs2_inode_cachep)
973 kmem_cache_destroy(ocfs2_inode_cachep);
974 if (ocfs2_lock_cache)
975 kmem_cache_destroy(ocfs2_lock_cache);
976
977 ocfs2_inode_cachep = NULL;
978 ocfs2_lock_cache = NULL;
979 }
980
981 static int ocfs2_get_sector(struct super_block *sb,
982 struct buffer_head **bh,
983 int block,
984 int sect_size)
985 {
986 if (!sb_set_blocksize(sb, sect_size)) {
987 mlog(ML_ERROR, "unable to set blocksize\n");
988 return -EIO;
989 }
990
991 *bh = sb_getblk(sb, block);
992 if (!*bh) {
993 mlog_errno(-EIO);
994 return -EIO;
995 }
996 lock_buffer(*bh);
997 if (!buffer_dirty(*bh))
998 clear_buffer_uptodate(*bh);
999 unlock_buffer(*bh);
1000 ll_rw_block(READ, 1, bh);
1001 wait_on_buffer(*bh);
1002 return 0;
1003 }
1004
1005 /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */
1006 static int ocfs2_fill_local_node_info(struct ocfs2_super *osb)
1007 {
1008 int status;
1009
1010 /* XXX hold a ref on the node while mounte? easy enough, if
1011 * desirable. */
1012 osb->node_num = o2nm_this_node();
1013 if (osb->node_num == O2NM_MAX_NODES) {
1014 mlog(ML_ERROR, "could not find this host's node number\n");
1015 status = -ENOENT;
1016 goto bail;
1017 }
1018
1019 mlog(ML_NOTICE, "I am node %d\n", osb->node_num);
1020
1021 status = 0;
1022 bail:
1023 return status;
1024 }
1025
1026 static int ocfs2_mount_volume(struct super_block *sb)
1027 {
1028 int status = 0;
1029 int unlock_super = 0;
1030 struct ocfs2_super *osb = OCFS2_SB(sb);
1031
1032 mlog_entry_void();
1033
1034 if (ocfs2_is_hard_readonly(osb))
1035 goto leave;
1036
1037 status = ocfs2_fill_local_node_info(osb);
1038 if (status < 0) {
1039 mlog_errno(status);
1040 goto leave;
1041 }
1042
1043 status = ocfs2_register_hb_callbacks(osb);
1044 if (status < 0) {
1045 mlog_errno(status);
1046 goto leave;
1047 }
1048
1049 status = ocfs2_dlm_init(osb);
1050 if (status < 0) {
1051 mlog_errno(status);
1052 goto leave;
1053 }
1054
1055 /* requires vote_thread to be running. */
1056 status = ocfs2_register_net_handlers(osb);
1057 if (status < 0) {
1058 mlog_errno(status);
1059 goto leave;
1060 }
1061
1062 status = ocfs2_super_lock(osb, 1);
1063 if (status < 0) {
1064 mlog_errno(status);
1065 goto leave;
1066 }
1067 unlock_super = 1;
1068
1069 /* This will load up the node map and add ourselves to it. */
1070 status = ocfs2_find_slot(osb);
1071 if (status < 0) {
1072 mlog_errno(status);
1073 goto leave;
1074 }
1075
1076 ocfs2_populate_mounted_map(osb);
1077
1078 /* load all node-local system inodes */
1079 status = ocfs2_init_local_system_inodes(osb);
1080 if (status < 0) {
1081 mlog_errno(status);
1082 goto leave;
1083 }
1084
1085 status = ocfs2_check_volume(osb);
1086 if (status < 0) {
1087 mlog_errno(status);
1088 goto leave;
1089 }
1090
1091 status = ocfs2_truncate_log_init(osb);
1092 if (status < 0) {
1093 mlog_errno(status);
1094 goto leave;
1095 }
1096
1097 /* This should be sent *after* we recovered our journal as it
1098 * will cause other nodes to unmark us as needing
1099 * recovery. However, we need to send it *before* dropping the
1100 * super block lock as otherwise their recovery threads might
1101 * try to clean us up while we're live! */
1102 status = ocfs2_request_mount_vote(osb);
1103 if (status < 0)
1104 mlog_errno(status);
1105
1106 leave:
1107 if (unlock_super)
1108 ocfs2_super_unlock(osb, 1);
1109
1110 mlog_exit(status);
1111 return status;
1112 }
1113
1114 /* we can't grab the goofy sem lock from inside wait_event, so we use
1115 * memory barriers to make sure that we'll see the null task before
1116 * being woken up */
1117 static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
1118 {
1119 mb();
1120 return osb->recovery_thread_task != NULL;
1121 }
1122
1123 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1124 {
1125 int tmp;
1126 struct ocfs2_super *osb = NULL;
1127
1128 mlog_entry("(0x%p)\n", sb);
1129
1130 BUG_ON(!sb);
1131 osb = OCFS2_SB(sb);
1132 BUG_ON(!osb);
1133
1134 ocfs2_shutdown_local_alloc(osb);
1135
1136 ocfs2_truncate_log_shutdown(osb);
1137
1138 /* disable any new recovery threads and wait for any currently
1139 * running ones to exit. Do this before setting the vol_state. */
1140 down(&osb->recovery_lock);
1141 osb->disable_recovery = 1;
1142 up(&osb->recovery_lock);
1143 wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
1144
1145 /* At this point, we know that no more recovery threads can be
1146 * launched, so wait for any recovery completion work to
1147 * complete. */
1148 flush_workqueue(ocfs2_wq);
1149
1150 ocfs2_journal_shutdown(osb);
1151
1152 ocfs2_sync_blockdev(sb);
1153
1154 /* No dlm means we've failed during mount, so skip all the
1155 * steps which depended on that to complete. */
1156 if (osb->dlm) {
1157 tmp = ocfs2_super_lock(osb, 1);
1158 if (tmp < 0) {
1159 mlog_errno(tmp);
1160 return;
1161 }
1162
1163 tmp = ocfs2_request_umount_vote(osb);
1164 if (tmp < 0)
1165 mlog_errno(tmp);
1166
1167 if (osb->slot_num != OCFS2_INVALID_SLOT)
1168 ocfs2_put_slot(osb);
1169
1170 ocfs2_super_unlock(osb, 1);
1171 }
1172
1173 ocfs2_release_system_inodes(osb);
1174
1175 if (osb->dlm) {
1176 ocfs2_unregister_net_handlers(osb);
1177
1178 ocfs2_dlm_shutdown(osb);
1179 }
1180
1181 ocfs2_clear_hb_callbacks(osb);
1182
1183 debugfs_remove(osb->osb_debug_root);
1184
1185 if (!mnt_err)
1186 ocfs2_stop_heartbeat(osb);
1187
1188 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1189
1190 printk("ocfs2: Unmounting device (%u,%u) on (node %d)\n",
1191 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev), osb->node_num);
1192
1193 ocfs2_delete_osb(osb);
1194 kfree(osb);
1195 sb->s_dev = 0;
1196 sb->s_fs_info = NULL;
1197 }
1198
1199 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1200 unsigned uuid_bytes)
1201 {
1202 int i, ret;
1203 char *ptr;
1204
1205 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1206
1207 osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1208 if (osb->uuid_str == NULL)
1209 return -ENOMEM;
1210
1211 memcpy(osb->uuid, uuid, OCFS2_VOL_UUID_LEN);
1212
1213 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1214 /* print with null */
1215 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1216 if (ret != 2) /* drop super cleans up */
1217 return -EINVAL;
1218 /* then only advance past the last char */
1219 ptr += 2;
1220 }
1221
1222 return 0;
1223 }
1224
1225 static int ocfs2_initialize_super(struct super_block *sb,
1226 struct buffer_head *bh,
1227 int sector_size)
1228 {
1229 int status = 0;
1230 int i;
1231 struct ocfs2_dinode *di = NULL;
1232 struct inode *inode = NULL;
1233 struct buffer_head *bitmap_bh = NULL;
1234 struct ocfs2_journal *journal;
1235 __le32 uuid_net_key;
1236 struct ocfs2_super *osb;
1237
1238 mlog_entry_void();
1239
1240 osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL);
1241 if (!osb) {
1242 status = -ENOMEM;
1243 mlog_errno(status);
1244 goto bail;
1245 }
1246
1247 sb->s_fs_info = osb;
1248 sb->s_op = &ocfs2_sops;
1249 sb->s_export_op = &ocfs2_export_ops;
1250 sb->s_flags |= MS_NOATIME;
1251 /* this is needed to support O_LARGEFILE */
1252 sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits);
1253
1254 osb->sb = sb;
1255 /* Save off for ocfs2_rw_direct */
1256 osb->s_sectsize_bits = blksize_bits(sector_size);
1257 if (!osb->s_sectsize_bits)
1258 BUG();
1259
1260 osb->net_response_ids = 0;
1261 spin_lock_init(&osb->net_response_lock);
1262 INIT_LIST_HEAD(&osb->net_response_list);
1263
1264 INIT_LIST_HEAD(&osb->osb_net_handlers);
1265 init_waitqueue_head(&osb->recovery_event);
1266 spin_lock_init(&osb->vote_task_lock);
1267 init_waitqueue_head(&osb->vote_event);
1268 osb->vote_work_sequence = 0;
1269 osb->vote_wake_sequence = 0;
1270 INIT_LIST_HEAD(&osb->blocked_lock_list);
1271 osb->blocked_lock_count = 0;
1272 INIT_LIST_HEAD(&osb->vote_list);
1273 spin_lock_init(&osb->osb_lock);
1274
1275 atomic_set(&osb->alloc_stats.moves, 0);
1276 atomic_set(&osb->alloc_stats.local_data, 0);
1277 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1278 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1279 atomic_set(&osb->alloc_stats.bg_extends, 0);
1280
1281 ocfs2_init_node_maps(osb);
1282
1283 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1284 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1285
1286 init_MUTEX(&osb->recovery_lock);
1287
1288 osb->disable_recovery = 0;
1289 osb->recovery_thread_task = NULL;
1290
1291 init_waitqueue_head(&osb->checkpoint_event);
1292 atomic_set(&osb->needs_checkpoint, 0);
1293
1294 osb->node_num = O2NM_INVALID_NODE_NUM;
1295 osb->slot_num = OCFS2_INVALID_SLOT;
1296
1297 osb->local_alloc_state = OCFS2_LA_UNUSED;
1298 osb->local_alloc_bh = NULL;
1299
1300 ocfs2_setup_hb_callbacks(osb);
1301
1302 init_waitqueue_head(&osb->osb_mount_event);
1303
1304 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1305 if (!osb->vol_label) {
1306 mlog(ML_ERROR, "unable to alloc vol label\n");
1307 status = -ENOMEM;
1308 goto bail;
1309 }
1310
1311 osb->uuid = kmalloc(OCFS2_VOL_UUID_LEN, GFP_KERNEL);
1312 if (!osb->uuid) {
1313 mlog(ML_ERROR, "unable to alloc uuid\n");
1314 status = -ENOMEM;
1315 goto bail;
1316 }
1317
1318 di = (struct ocfs2_dinode *)bh->b_data;
1319
1320 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1321 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1322 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1323 osb->max_slots);
1324 status = -EINVAL;
1325 goto bail;
1326 }
1327 mlog(ML_NOTICE, "max_slots for this device: %u\n", osb->max_slots);
1328
1329 osb->s_feature_compat =
1330 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1331 osb->s_feature_ro_compat =
1332 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1333 osb->s_feature_incompat =
1334 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1335
1336 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1337 mlog(ML_ERROR, "couldn't mount because of unsupported "
1338 "optional features (%x).\n", i);
1339 status = -EINVAL;
1340 goto bail;
1341 }
1342 if (!(osb->sb->s_flags & MS_RDONLY) &&
1343 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1344 mlog(ML_ERROR, "couldn't mount RDWR because of "
1345 "unsupported optional features (%x).\n", i);
1346 status = -EINVAL;
1347 goto bail;
1348 }
1349
1350 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1351
1352 /* FIXME
1353 * This should be done in ocfs2_journal_init(), but unknown
1354 * ordering issues will cause the filesystem to crash.
1355 * If anyone wants to figure out what part of the code
1356 * refers to osb->journal before ocfs2_journal_init() is run,
1357 * be my guest.
1358 */
1359 /* initialize our journal structure */
1360
1361 journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL);
1362 if (!journal) {
1363 mlog(ML_ERROR, "unable to alloc journal\n");
1364 status = -ENOMEM;
1365 goto bail;
1366 }
1367 osb->journal = journal;
1368 journal->j_osb = osb;
1369
1370 atomic_set(&journal->j_num_trans, 0);
1371 init_rwsem(&journal->j_trans_barrier);
1372 init_waitqueue_head(&journal->j_checkpointed);
1373 spin_lock_init(&journal->j_lock);
1374 journal->j_trans_id = (unsigned long) 1;
1375 INIT_LIST_HEAD(&journal->j_la_cleanups);
1376 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb);
1377 journal->j_state = OCFS2_JOURNAL_FREE;
1378
1379 /* get some pseudo constants for clustersize bits */
1380 osb->s_clustersize_bits =
1381 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1382 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1383 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1384
1385 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1386 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1387 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1388 osb->s_clustersize);
1389 status = -EINVAL;
1390 goto bail;
1391 }
1392
1393 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1394 > (u32)~0UL) {
1395 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1396 "what jbd can address in 32 bits.\n");
1397 status = -EINVAL;
1398 goto bail;
1399 }
1400
1401 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1402 sizeof(di->id2.i_super.s_uuid))) {
1403 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1404 status = -ENOMEM;
1405 goto bail;
1406 }
1407
1408 memcpy(&uuid_net_key, &osb->uuid[i], sizeof(osb->net_key));
1409 osb->net_key = le32_to_cpu(uuid_net_key);
1410
1411 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1412 osb->vol_label[63] = '\0';
1413 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1414 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1415 osb->first_cluster_group_blkno =
1416 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1417 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1418 mlog(0, "vol_label: %s\n", osb->vol_label);
1419 mlog(0, "uuid: %s\n", osb->uuid_str);
1420 mlog(0, "root_blkno=%"MLFu64", system_dir_blkno=%"MLFu64"\n",
1421 osb->root_blkno, osb->system_dir_blkno);
1422
1423 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1424 if (!osb->osb_dlm_debug) {
1425 status = -ENOMEM;
1426 mlog_errno(status);
1427 goto bail;
1428 }
1429
1430 atomic_set(&osb->vol_state, VOLUME_INIT);
1431
1432 /* load root, system_dir, and all global system inodes */
1433 status = ocfs2_init_global_system_inodes(osb);
1434 if (status < 0) {
1435 mlog_errno(status);
1436 goto bail;
1437 }
1438
1439 /*
1440 * global bitmap
1441 */
1442 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1443 OCFS2_INVALID_SLOT);
1444 if (!inode) {
1445 status = -EINVAL;
1446 mlog_errno(status);
1447 goto bail;
1448 }
1449
1450 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1451
1452 status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0,
1453 inode);
1454 iput(inode);
1455 if (status < 0) {
1456 mlog_errno(status);
1457 goto bail;
1458 }
1459
1460 di = (struct ocfs2_dinode *) bitmap_bh->b_data;
1461 osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
1462 osb->num_clusters = le32_to_cpu(di->id1.bitmap1.i_total);
1463 brelse(bitmap_bh);
1464 mlog(0, "cluster bitmap inode: %"MLFu64", clusters per group: %u\n",
1465 osb->bitmap_blkno, osb->bitmap_cpg);
1466
1467 status = ocfs2_init_slot_info(osb);
1468 if (status < 0) {
1469 mlog_errno(status);
1470 goto bail;
1471 }
1472
1473 /* Link this osb onto the global linked list of all osb structures. */
1474 /* The Global Link List is mainted for the whole driver . */
1475 spin_lock(&ocfs2_globals_lock);
1476 osb->osb_id = osb_id;
1477 if (osb_id < OCFS2_MAX_OSB_ID)
1478 osb_id++;
1479 else {
1480 mlog(ML_ERROR, "Too many volumes mounted\n");
1481 status = -ENOMEM;
1482 }
1483 spin_unlock(&ocfs2_globals_lock);
1484
1485 bail:
1486 mlog_exit(status);
1487 return status;
1488 }
1489
1490 /*
1491 * will return: -EAGAIN if it is ok to keep searching for superblocks
1492 * -EINVAL if there is a bad superblock
1493 * 0 on success
1494 */
1495 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1496 struct buffer_head *bh,
1497 u32 blksz)
1498 {
1499 int status = -EAGAIN;
1500
1501 mlog_entry_void();
1502
1503 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1504 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1505 status = -EINVAL;
1506 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1507 mlog(ML_ERROR, "found superblock with incorrect block "
1508 "size: found %u, should be %u\n",
1509 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1510 blksz);
1511 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1512 OCFS2_MAJOR_REV_LEVEL ||
1513 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1514 OCFS2_MINOR_REV_LEVEL) {
1515 mlog(ML_ERROR, "found superblock with bad version: "
1516 "found %u.%u, should be %u.%u\n",
1517 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1518 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1519 OCFS2_MAJOR_REV_LEVEL,
1520 OCFS2_MINOR_REV_LEVEL);
1521 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1522 mlog(ML_ERROR, "bad block number on superblock: "
1523 "found %"MLFu64", should be %llu\n",
1524 di->i_blkno, (unsigned long long)bh->b_blocknr);
1525 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1526 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1527 mlog(ML_ERROR, "bad cluster size found: %u\n",
1528 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1529 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1530 mlog(ML_ERROR, "bad root_blkno: 0\n");
1531 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1532 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1533 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1534 mlog(ML_ERROR,
1535 "Superblock slots found greater than file system "
1536 "maximum: found %u, max %u\n",
1537 le16_to_cpu(di->id2.i_super.s_max_slots),
1538 OCFS2_MAX_SLOTS);
1539 } else {
1540 /* found it! */
1541 status = 0;
1542 }
1543 }
1544
1545 mlog_exit(status);
1546 return status;
1547 }
1548
1549 static int ocfs2_check_volume(struct ocfs2_super *osb)
1550 {
1551 int status = 0;
1552 int dirty;
1553 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1554 * recover
1555 * ourselves. */
1556
1557 mlog_entry_void();
1558
1559 /* Init our journal object. */
1560 status = ocfs2_journal_init(osb->journal, &dirty);
1561 if (status < 0) {
1562 mlog(ML_ERROR, "Could not initialize journal!\n");
1563 goto finally;
1564 }
1565
1566 /* If the journal was unmounted cleanly then we don't want to
1567 * recover anything. Otherwise, journal_load will do that
1568 * dirty work for us :) */
1569 if (!dirty) {
1570 status = ocfs2_journal_wipe(osb->journal, 0);
1571 if (status < 0) {
1572 mlog_errno(status);
1573 goto finally;
1574 }
1575 } else {
1576 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1577 "recovering volume.\n");
1578 }
1579
1580 /* will play back anything left in the journal. */
1581 ocfs2_journal_load(osb->journal);
1582
1583 if (dirty) {
1584 /* recover my local alloc if we didn't unmount cleanly. */
1585 status = ocfs2_begin_local_alloc_recovery(osb,
1586 osb->slot_num,
1587 &local_alloc);
1588 if (status < 0) {
1589 mlog_errno(status);
1590 goto finally;
1591 }
1592 /* we complete the recovery process after we've marked
1593 * ourselves as mounted. */
1594 }
1595
1596 mlog(0, "Journal loaded.\n");
1597
1598 status = ocfs2_load_local_alloc(osb);
1599 if (status < 0) {
1600 mlog_errno(status);
1601 goto finally;
1602 }
1603
1604 if (dirty) {
1605 /* Recovery will be completed after we've mounted the
1606 * rest of the volume. */
1607 osb->dirty = 1;
1608 osb->local_alloc_copy = local_alloc;
1609 local_alloc = NULL;
1610 }
1611
1612 /* go through each journal, trylock it and if you get the
1613 * lock, and it's marked as dirty, set the bit in the recover
1614 * map and launch a recovery thread for it. */
1615 status = ocfs2_mark_dead_nodes(osb);
1616 if (status < 0)
1617 mlog_errno(status);
1618
1619 finally:
1620 if (local_alloc)
1621 kfree(local_alloc);
1622
1623 mlog_exit(status);
1624 return status;
1625 }
1626
1627 /*
1628 * The routine gets called from dismount or close whenever a dismount on
1629 * volume is requested and the osb open count becomes 1.
1630 * It will remove the osb from the global list and also free up all the
1631 * initialized resources and fileobject.
1632 */
1633 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1634 {
1635 mlog_entry_void();
1636
1637 /* This function assumes that the caller has the main osb resource */
1638
1639 if (osb->slot_info)
1640 ocfs2_free_slot_info(osb->slot_info);
1641
1642 /* FIXME
1643 * This belongs in journal shutdown, but because we have to
1644 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1645 * we free it here.
1646 */
1647 kfree(osb->journal);
1648 if (osb->local_alloc_copy)
1649 kfree(osb->local_alloc_copy);
1650 kfree(osb->uuid_str);
1651 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1652 memset(osb, 0, sizeof(struct ocfs2_super));
1653
1654 mlog_exit_void();
1655 }
1656
1657 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1658 * panic(). We do not support continue-on-error operation. */
1659 static void ocfs2_handle_error(struct super_block *sb)
1660 {
1661 struct ocfs2_super *osb = OCFS2_SB(sb);
1662
1663 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1664 panic("OCFS2: (device %s): panic forced after error\n",
1665 sb->s_id);
1666
1667 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1668
1669 if (sb->s_flags & MS_RDONLY &&
1670 (ocfs2_is_soft_readonly(osb) ||
1671 ocfs2_is_hard_readonly(osb)))
1672 return;
1673
1674 printk(KERN_CRIT "File system is now read-only due to the potential "
1675 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1676 "system is unmounted.\n");
1677 sb->s_flags |= MS_RDONLY;
1678 ocfs2_set_ro_flag(osb, 0);
1679 }
1680
1681 static char error_buf[1024];
1682
1683 void __ocfs2_error(struct super_block *sb,
1684 const char *function,
1685 const char *fmt, ...)
1686 {
1687 va_list args;
1688
1689 va_start(args, fmt);
1690 vsprintf(error_buf, fmt, args);
1691 va_end(args);
1692
1693 /* Not using mlog here because we want to show the actual
1694 * function the error came from. */
1695 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1696 sb->s_id, function, error_buf);
1697
1698 ocfs2_handle_error(sb);
1699 }
1700
1701 /* Handle critical errors. This is intentionally more drastic than
1702 * ocfs2_handle_error, so we only use for things like journal errors,
1703 * etc. */
1704 void __ocfs2_abort(struct super_block* sb,
1705 const char *function,
1706 const char *fmt, ...)
1707 {
1708 va_list args;
1709
1710 va_start(args, fmt);
1711 vsprintf(error_buf, fmt, args);
1712 va_end(args);
1713
1714 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1715 sb->s_id, function, error_buf);
1716
1717 /* We don't have the cluster support yet to go straight to
1718 * hard readonly in here. Until then, we want to keep
1719 * ocfs2_abort() so that we can at least mark critical
1720 * errors.
1721 *
1722 * TODO: This should abort the journal and alert other nodes
1723 * that our slot needs recovery. */
1724
1725 /* Force a panic(). This stinks, but it's better than letting
1726 * things continue without having a proper hard readonly
1727 * here. */
1728 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1729 ocfs2_handle_error(sb);
1730 }
1731
1732 module_init(ocfs2_init);
1733 module_exit(ocfs2_exit);
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