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ocfs2: Add xattr mount option in ocfs2_show_options()
[linux-2.6/mini2440.git] / fs / ocfs2 / super.c
blobd2027cec8f3b56a47f3f427757a791d67081ce16
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * super.c
5 *
6 * load/unload driver, mount/dismount volumes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/module.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/utsname.h>
32 #include <linux/init.h>
33 #include <linux/random.h>
34 #include <linux/statfs.h>
35 #include <linux/moduleparam.h>
36 #include <linux/blkdev.h>
37 #include <linux/socket.h>
38 #include <linux/inet.h>
39 #include <linux/parser.h>
40 #include <linux/crc32.h>
41 #include <linux/debugfs.h>
42 #include <linux/mount.h>
43 #include <linux/seq_file.h>
44
45 #define MLOG_MASK_PREFIX ML_SUPER
46 #include <cluster/masklog.h>
47
48 #include "ocfs2.h"
49
50 /* this should be the only file to include a version 1 header */
51 #include "ocfs1_fs_compat.h"
52
53 #include "alloc.h"
54 #include "dlmglue.h"
55 #include "export.h"
56 #include "extent_map.h"
57 #include "heartbeat.h"
58 #include "inode.h"
59 #include "journal.h"
60 #include "localalloc.h"
61 #include "namei.h"
62 #include "slot_map.h"
63 #include "super.h"
64 #include "sysfile.h"
65 #include "uptodate.h"
66 #include "ver.h"
67 #include "xattr.h"
68
69 #include "buffer_head_io.h"
70
71 static struct kmem_cache *ocfs2_inode_cachep = NULL;
72
73 /* OCFS2 needs to schedule several differnt types of work which
74 * require cluster locking, disk I/O, recovery waits, etc. Since these
75 * types of work tend to be heavy we avoid using the kernel events
76 * workqueue and schedule on our own. */
77 struct workqueue_struct *ocfs2_wq = NULL;
78
79 static struct dentry *ocfs2_debugfs_root = NULL;
80
81 MODULE_AUTHOR("Oracle");
82 MODULE_LICENSE("GPL");
83
84 struct mount_options
85 {
86 unsigned long commit_interval;
87 unsigned long mount_opt;
88 unsigned int atime_quantum;
89 signed short slot;
90 unsigned int localalloc_opt;
91 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
92 };
93
94 static int ocfs2_parse_options(struct super_block *sb, char *options,
95 struct mount_options *mopt,
96 int is_remount);
97 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
98 static void ocfs2_put_super(struct super_block *sb);
99 static int ocfs2_mount_volume(struct super_block *sb);
100 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
101 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
102 static int ocfs2_initialize_mem_caches(void);
103 static void ocfs2_free_mem_caches(void);
104 static void ocfs2_delete_osb(struct ocfs2_super *osb);
105
106 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
107
108 static int ocfs2_sync_fs(struct super_block *sb, int wait);
109
110 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
111 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
112 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
113 static int ocfs2_check_volume(struct ocfs2_super *osb);
114 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
115 struct buffer_head *bh,
116 u32 sectsize);
117 static int ocfs2_initialize_super(struct super_block *sb,
118 struct buffer_head *bh,
119 int sector_size);
120 static int ocfs2_get_sector(struct super_block *sb,
121 struct buffer_head **bh,
122 int block,
123 int sect_size);
124 static void ocfs2_write_super(struct super_block *sb);
125 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
126 static void ocfs2_destroy_inode(struct inode *inode);
127
128 static const 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 .show_options = ocfs2_show_options,
140 };
141
142 enum {
143 Opt_barrier,
144 Opt_err_panic,
145 Opt_err_ro,
146 Opt_intr,
147 Opt_nointr,
148 Opt_hb_none,
149 Opt_hb_local,
150 Opt_data_ordered,
151 Opt_data_writeback,
152 Opt_atime_quantum,
153 Opt_slot,
154 Opt_commit,
155 Opt_localalloc,
156 Opt_localflocks,
157 Opt_stack,
158 Opt_user_xattr,
159 Opt_nouser_xattr,
160 Opt_inode64,
161 Opt_err,
162 };
163
164 static const match_table_t tokens = {
165 {Opt_barrier, "barrier=%u"},
166 {Opt_err_panic, "errors=panic"},
167 {Opt_err_ro, "errors=remount-ro"},
168 {Opt_intr, "intr"},
169 {Opt_nointr, "nointr"},
170 {Opt_hb_none, OCFS2_HB_NONE},
171 {Opt_hb_local, OCFS2_HB_LOCAL},
172 {Opt_data_ordered, "data=ordered"},
173 {Opt_data_writeback, "data=writeback"},
174 {Opt_atime_quantum, "atime_quantum=%u"},
175 {Opt_slot, "preferred_slot=%u"},
176 {Opt_commit, "commit=%u"},
177 {Opt_localalloc, "localalloc=%d"},
178 {Opt_localflocks, "localflocks"},
179 {Opt_stack, "cluster_stack=%s"},
180 {Opt_user_xattr, "user_xattr"},
181 {Opt_nouser_xattr, "nouser_xattr"},
182 {Opt_inode64, "inode64"},
183 {Opt_err, NULL}
184 };
185
186 /*
187 * write_super and sync_fs ripped right out of ext3.
188 */
189 static void ocfs2_write_super(struct super_block *sb)
190 {
191 if (mutex_trylock(&sb->s_lock) != 0)
192 BUG();
193 sb->s_dirt = 0;
194 }
195
196 static int ocfs2_sync_fs(struct super_block *sb, int wait)
197 {
198 int status;
199 tid_t target;
200 struct ocfs2_super *osb = OCFS2_SB(sb);
201
202 sb->s_dirt = 0;
203
204 if (ocfs2_is_hard_readonly(osb))
205 return -EROFS;
206
207 if (wait) {
208 status = ocfs2_flush_truncate_log(osb);
209 if (status < 0)
210 mlog_errno(status);
211 } else {
212 ocfs2_schedule_truncate_log_flush(osb, 0);
213 }
214
215 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
216 &target)) {
217 if (wait)
218 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
219 target);
220 }
221 return 0;
222 }
223
224 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
225 {
226 struct inode *new = NULL;
227 int status = 0;
228 int i;
229
230 mlog_entry_void();
231
232 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
233 if (IS_ERR(new)) {
234 status = PTR_ERR(new);
235 mlog_errno(status);
236 goto bail;
237 }
238 osb->root_inode = new;
239
240 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
241 if (IS_ERR(new)) {
242 status = PTR_ERR(new);
243 mlog_errno(status);
244 goto bail;
245 }
246 osb->sys_root_inode = new;
247
248 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
249 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
250 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
251 if (!new) {
252 ocfs2_release_system_inodes(osb);
253 status = -EINVAL;
254 mlog_errno(status);
255 /* FIXME: Should ERROR_RO_FS */
256 mlog(ML_ERROR, "Unable to load system inode %d, "
257 "possibly corrupt fs?", i);
258 goto bail;
259 }
260 // the array now has one ref, so drop this one
261 iput(new);
262 }
263
264 bail:
265 mlog_exit(status);
266 return status;
267 }
268
269 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
270 {
271 struct inode *new = NULL;
272 int status = 0;
273 int i;
274
275 mlog_entry_void();
276
277 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
278 i < NUM_SYSTEM_INODES;
279 i++) {
280 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
281 if (!new) {
282 ocfs2_release_system_inodes(osb);
283 status = -EINVAL;
284 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
285 status, i, osb->slot_num);
286 goto bail;
287 }
288 /* the array now has one ref, so drop this one */
289 iput(new);
290 }
291
292 bail:
293 mlog_exit(status);
294 return status;
295 }
296
297 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
298 {
299 int i;
300 struct inode *inode;
301
302 mlog_entry_void();
303
304 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
305 inode = osb->system_inodes[i];
306 if (inode) {
307 iput(inode);
308 osb->system_inodes[i] = NULL;
309 }
310 }
311
312 inode = osb->sys_root_inode;
313 if (inode) {
314 iput(inode);
315 osb->sys_root_inode = NULL;
316 }
317
318 inode = osb->root_inode;
319 if (inode) {
320 iput(inode);
321 osb->root_inode = NULL;
322 }
323
324 mlog_exit(0);
325 }
326
327 /* We're allocating fs objects, use GFP_NOFS */
328 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
329 {
330 struct ocfs2_inode_info *oi;
331
332 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
333 if (!oi)
334 return NULL;
335
336 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
337 return &oi->vfs_inode;
338 }
339
340 static void ocfs2_destroy_inode(struct inode *inode)
341 {
342 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
343 }
344
345 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
346 unsigned int cbits)
347 {
348 unsigned int bytes = 1 << cbits;
349 unsigned int trim = bytes;
350 unsigned int bitshift = 32;
351
352 /*
353 * i_size and all block offsets in ocfs2 are always 64 bits
354 * wide. i_clusters is 32 bits, in cluster-sized units. So on
355 * 64 bit platforms, cluster size will be the limiting factor.
356 */
357
358 #if BITS_PER_LONG == 32
359 # if defined(CONFIG_LBD)
360 BUILD_BUG_ON(sizeof(sector_t) != 8);
361 /*
362 * We might be limited by page cache size.
363 */
364 if (bytes > PAGE_CACHE_SIZE) {
365 bytes = PAGE_CACHE_SIZE;
366 trim = 1;
367 /*
368 * Shift by 31 here so that we don't get larger than
369 * MAX_LFS_FILESIZE
370 */
371 bitshift = 31;
372 }
373 # else
374 /*
375 * We are limited by the size of sector_t. Use block size, as
376 * that's what we expose to the VFS.
377 */
378 bytes = 1 << bbits;
379 trim = 1;
380 bitshift = 31;
381 # endif
382 #endif
383
384 /*
385 * Trim by a whole cluster when we can actually approach the
386 * on-disk limits. Otherwise we can overflow i_clusters when
387 * an extent start is at the max offset.
388 */
389 return (((unsigned long long)bytes) << bitshift) - trim;
390 }
391
392 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
393 {
394 int incompat_features;
395 int ret = 0;
396 struct mount_options parsed_options;
397 struct ocfs2_super *osb = OCFS2_SB(sb);
398
399 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
400 ret = -EINVAL;
401 goto out;
402 }
403
404 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
405 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
406 ret = -EINVAL;
407 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
408 goto out;
409 }
410
411 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
412 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
413 ret = -EINVAL;
414 mlog(ML_ERROR, "Cannot change data mode on remount\n");
415 goto out;
416 }
417
418 /* Probably don't want this on remount; it might
419 * mess with other nodes */
420 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
421 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
422 ret = -EINVAL;
423 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
424 goto out;
425 }
426
427 /* We're going to/from readonly mode. */
428 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
429 /* Lock here so the check of HARD_RO and the potential
430 * setting of SOFT_RO is atomic. */
431 spin_lock(&osb->osb_lock);
432 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
433 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
434 ret = -EROFS;
435 goto unlock_osb;
436 }
437
438 if (*flags & MS_RDONLY) {
439 mlog(0, "Going to ro mode.\n");
440 sb->s_flags |= MS_RDONLY;
441 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
442 } else {
443 mlog(0, "Making ro filesystem writeable.\n");
444
445 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
446 mlog(ML_ERROR, "Cannot remount RDWR "
447 "filesystem due to previous errors.\n");
448 ret = -EROFS;
449 goto unlock_osb;
450 }
451 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
452 if (incompat_features) {
453 mlog(ML_ERROR, "Cannot remount RDWR because "
454 "of unsupported optional features "
455 "(%x).\n", incompat_features);
456 ret = -EINVAL;
457 goto unlock_osb;
458 }
459 sb->s_flags &= ~MS_RDONLY;
460 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
461 }
462 unlock_osb:
463 spin_unlock(&osb->osb_lock);
464 }
465
466 if (!ret) {
467 /* Only save off the new mount options in case of a successful
468 * remount. */
469 osb->s_mount_opt = parsed_options.mount_opt;
470 osb->s_atime_quantum = parsed_options.atime_quantum;
471 osb->preferred_slot = parsed_options.slot;
472 if (parsed_options.commit_interval)
473 osb->osb_commit_interval = parsed_options.commit_interval;
474
475 if (!ocfs2_is_hard_readonly(osb))
476 ocfs2_set_journal_params(osb);
477 }
478 out:
479 return ret;
480 }
481
482 static int ocfs2_sb_probe(struct super_block *sb,
483 struct buffer_head **bh,
484 int *sector_size)
485 {
486 int status, tmpstat;
487 struct ocfs1_vol_disk_hdr *hdr;
488 struct ocfs2_dinode *di;
489 int blksize;
490
491 *bh = NULL;
492
493 /* may be > 512 */
494 *sector_size = bdev_hardsect_size(sb->s_bdev);
495 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
496 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
497 *sector_size, OCFS2_MAX_BLOCKSIZE);
498 status = -EINVAL;
499 goto bail;
500 }
501
502 /* Can this really happen? */
503 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
504 *sector_size = OCFS2_MIN_BLOCKSIZE;
505
506 /* check block zero for old format */
507 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
508 if (status < 0) {
509 mlog_errno(status);
510 goto bail;
511 }
512 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
513 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
514 mlog(ML_ERROR, "incompatible version: %u.%u\n",
515 hdr->major_version, hdr->minor_version);
516 status = -EINVAL;
517 }
518 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
519 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
520 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
521 hdr->signature);
522 status = -EINVAL;
523 }
524 brelse(*bh);
525 *bh = NULL;
526 if (status < 0) {
527 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
528 "upgraded before mounting with ocfs v2\n");
529 goto bail;
530 }
531
532 /*
533 * Now check at magic offset for 512, 1024, 2048, 4096
534 * blocksizes. 4096 is the maximum blocksize because it is
535 * the minimum clustersize.
536 */
537 status = -EINVAL;
538 for (blksize = *sector_size;
539 blksize <= OCFS2_MAX_BLOCKSIZE;
540 blksize <<= 1) {
541 tmpstat = ocfs2_get_sector(sb, bh,
542 OCFS2_SUPER_BLOCK_BLKNO,
543 blksize);
544 if (tmpstat < 0) {
545 status = tmpstat;
546 mlog_errno(status);
547 goto bail;
548 }
549 di = (struct ocfs2_dinode *) (*bh)->b_data;
550 status = ocfs2_verify_volume(di, *bh, blksize);
551 if (status >= 0)
552 goto bail;
553 brelse(*bh);
554 *bh = NULL;
555 if (status != -EAGAIN)
556 break;
557 }
558
559 bail:
560 return status;
561 }
562
563 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
564 {
565 if (ocfs2_mount_local(osb)) {
566 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
567 mlog(ML_ERROR, "Cannot heartbeat on a locally "
568 "mounted device.\n");
569 return -EINVAL;
570 }
571 }
572
573 if (ocfs2_userspace_stack(osb)) {
574 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
575 mlog(ML_ERROR, "Userspace stack expected, but "
576 "o2cb heartbeat arguments passed to mount\n");
577 return -EINVAL;
578 }
579 }
580
581 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
582 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
583 !ocfs2_userspace_stack(osb)) {
584 mlog(ML_ERROR, "Heartbeat has to be started to mount "
585 "a read-write clustered device.\n");
586 return -EINVAL;
587 }
588 }
589
590 return 0;
591 }
592
593 /*
594 * If we're using a userspace stack, mount should have passed
595 * a name that matches the disk. If not, mount should not
596 * have passed a stack.
597 */
598 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
599 struct mount_options *mopt)
600 {
601 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
602 mlog(ML_ERROR,
603 "cluster stack passed to mount, but this filesystem "
604 "does not support it\n");
605 return -EINVAL;
606 }
607
608 if (ocfs2_userspace_stack(osb) &&
609 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
610 OCFS2_STACK_LABEL_LEN)) {
611 mlog(ML_ERROR,
612 "cluster stack passed to mount (\"%s\") does not "
613 "match the filesystem (\"%s\")\n",
614 mopt->cluster_stack,
615 osb->osb_cluster_stack);
616 return -EINVAL;
617 }
618
619 return 0;
620 }
621
622 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
623 {
624 struct dentry *root;
625 int status, sector_size;
626 struct mount_options parsed_options;
627 struct inode *inode = NULL;
628 struct ocfs2_super *osb = NULL;
629 struct buffer_head *bh = NULL;
630 char nodestr[8];
631
632 mlog_entry("%p, %p, %i", sb, data, silent);
633
634 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
635 status = -EINVAL;
636 goto read_super_error;
637 }
638
639 /* probe for superblock */
640 status = ocfs2_sb_probe(sb, &bh, &sector_size);
641 if (status < 0) {
642 mlog(ML_ERROR, "superblock probe failed!\n");
643 goto read_super_error;
644 }
645
646 status = ocfs2_initialize_super(sb, bh, sector_size);
647 osb = OCFS2_SB(sb);
648 if (status < 0) {
649 mlog_errno(status);
650 goto read_super_error;
651 }
652 brelse(bh);
653 bh = NULL;
654 osb->s_mount_opt = parsed_options.mount_opt;
655 osb->s_atime_quantum = parsed_options.atime_quantum;
656 osb->preferred_slot = parsed_options.slot;
657 osb->osb_commit_interval = parsed_options.commit_interval;
658 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
659 osb->local_alloc_bits = osb->local_alloc_default_bits;
660
661 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
662 if (status)
663 goto read_super_error;
664
665 sb->s_magic = OCFS2_SUPER_MAGIC;
666
667 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
668 * heartbeat=none */
669 if (bdev_read_only(sb->s_bdev)) {
670 if (!(sb->s_flags & MS_RDONLY)) {
671 status = -EACCES;
672 mlog(ML_ERROR, "Readonly device detected but readonly "
673 "mount was not specified.\n");
674 goto read_super_error;
675 }
676
677 /* You should not be able to start a local heartbeat
678 * on a readonly device. */
679 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
680 status = -EROFS;
681 mlog(ML_ERROR, "Local heartbeat specified on readonly "
682 "device.\n");
683 goto read_super_error;
684 }
685
686 status = ocfs2_check_journals_nolocks(osb);
687 if (status < 0) {
688 if (status == -EROFS)
689 mlog(ML_ERROR, "Recovery required on readonly "
690 "file system, but write access is "
691 "unavailable.\n");
692 else
693 mlog_errno(status);
694 goto read_super_error;
695 }
696
697 ocfs2_set_ro_flag(osb, 1);
698
699 printk(KERN_NOTICE "Readonly device detected. No cluster "
700 "services will be utilized for this mount. Recovery "
701 "will be skipped.\n");
702 }
703
704 if (!ocfs2_is_hard_readonly(osb)) {
705 if (sb->s_flags & MS_RDONLY)
706 ocfs2_set_ro_flag(osb, 0);
707 }
708
709 status = ocfs2_verify_heartbeat(osb);
710 if (status < 0) {
711 mlog_errno(status);
712 goto read_super_error;
713 }
714
715 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
716 ocfs2_debugfs_root);
717 if (!osb->osb_debug_root) {
718 status = -EINVAL;
719 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
720 goto read_super_error;
721 }
722
723 status = ocfs2_mount_volume(sb);
724 if (osb->root_inode)
725 inode = igrab(osb->root_inode);
726
727 if (status < 0)
728 goto read_super_error;
729
730 if (!inode) {
731 status = -EIO;
732 mlog_errno(status);
733 goto read_super_error;
734 }
735
736 root = d_alloc_root(inode);
737 if (!root) {
738 status = -ENOMEM;
739 mlog_errno(status);
740 goto read_super_error;
741 }
742
743 sb->s_root = root;
744
745 ocfs2_complete_mount_recovery(osb);
746
747 if (ocfs2_mount_local(osb))
748 snprintf(nodestr, sizeof(nodestr), "local");
749 else
750 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
751
752 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
753 "with %s data mode.\n",
754 osb->dev_str, nodestr, osb->slot_num,
755 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
756 "ordered");
757
758 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
759 wake_up(&osb->osb_mount_event);
760
761 mlog_exit(status);
762 return status;
763
764 read_super_error:
765 if (bh != NULL)
766 brelse(bh);
767
768 if (inode)
769 iput(inode);
770
771 if (osb) {
772 atomic_set(&osb->vol_state, VOLUME_DISABLED);
773 wake_up(&osb->osb_mount_event);
774 ocfs2_dismount_volume(sb, 1);
775 }
776
777 mlog_exit(status);
778 return status;
779 }
780
781 static int ocfs2_get_sb(struct file_system_type *fs_type,
782 int flags,
783 const char *dev_name,
784 void *data,
785 struct vfsmount *mnt)
786 {
787 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
788 mnt);
789 }
790
791 static struct file_system_type ocfs2_fs_type = {
792 .owner = THIS_MODULE,
793 .name = "ocfs2",
794 .get_sb = ocfs2_get_sb, /* is this called when we mount
795 * the fs? */
796 .kill_sb = kill_block_super, /* set to the generic one
797 * right now, but do we
798 * need to change that? */
799 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
800 .next = NULL
801 };
802
803 static int ocfs2_parse_options(struct super_block *sb,
804 char *options,
805 struct mount_options *mopt,
806 int is_remount)
807 {
808 int status;
809 char *p;
810
811 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
812 options ? options : "(none)");
813
814 mopt->commit_interval = 0;
815 mopt->mount_opt = 0;
816 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
817 mopt->slot = OCFS2_INVALID_SLOT;
818 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
819 mopt->cluster_stack[0] = '\0';
820
821 if (!options) {
822 status = 1;
823 goto bail;
824 }
825
826 while ((p = strsep(&options, ",")) != NULL) {
827 int token, option;
828 substring_t args[MAX_OPT_ARGS];
829
830 if (!*p)
831 continue;
832
833 token = match_token(p, tokens, args);
834 switch (token) {
835 case Opt_hb_local:
836 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
837 break;
838 case Opt_hb_none:
839 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
840 break;
841 case Opt_barrier:
842 if (match_int(&args[0], &option)) {
843 status = 0;
844 goto bail;
845 }
846 if (option)
847 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
848 else
849 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
850 break;
851 case Opt_intr:
852 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
853 break;
854 case Opt_nointr:
855 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
856 break;
857 case Opt_err_panic:
858 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
859 break;
860 case Opt_err_ro:
861 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
862 break;
863 case Opt_data_ordered:
864 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
865 break;
866 case Opt_data_writeback:
867 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
868 break;
869 case Opt_user_xattr:
870 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
871 break;
872 case Opt_nouser_xattr:
873 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
874 break;
875 case Opt_atime_quantum:
876 if (match_int(&args[0], &option)) {
877 status = 0;
878 goto bail;
879 }
880 if (option >= 0)
881 mopt->atime_quantum = option;
882 break;
883 case Opt_slot:
884 option = 0;
885 if (match_int(&args[0], &option)) {
886 status = 0;
887 goto bail;
888 }
889 if (option)
890 mopt->slot = (s16)option;
891 break;
892 case Opt_commit:
893 option = 0;
894 if (match_int(&args[0], &option)) {
895 status = 0;
896 goto bail;
897 }
898 if (option < 0)
899 return 0;
900 if (option == 0)
901 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
902 mopt->commit_interval = HZ * option;
903 break;
904 case Opt_localalloc:
905 option = 0;
906 if (match_int(&args[0], &option)) {
907 status = 0;
908 goto bail;
909 }
910 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
911 mopt->localalloc_opt = option;
912 break;
913 case Opt_localflocks:
914 /*
915 * Changing this during remount could race
916 * flock() requests, or "unbalance" existing
917 * ones (e.g., a lock is taken in one mode but
918 * dropped in the other). If users care enough
919 * to flip locking modes during remount, we
920 * could add a "local" flag to individual
921 * flock structures for proper tracking of
922 * state.
923 */
924 if (!is_remount)
925 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
926 break;
927 case Opt_stack:
928 /* Check both that the option we were passed
929 * is of the right length and that it is a proper
930 * string of the right length.
931 */
932 if (((args[0].to - args[0].from) !=
933 OCFS2_STACK_LABEL_LEN) ||
934 (strnlen(args[0].from,
935 OCFS2_STACK_LABEL_LEN) !=
936 OCFS2_STACK_LABEL_LEN)) {
937 mlog(ML_ERROR,
938 "Invalid cluster_stack option\n");
939 status = 0;
940 goto bail;
941 }
942 memcpy(mopt->cluster_stack, args[0].from,
943 OCFS2_STACK_LABEL_LEN);
944 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
945 break;
946 case Opt_inode64:
947 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
948 break;
949 default:
950 mlog(ML_ERROR,
951 "Unrecognized mount option \"%s\" "
952 "or missing value\n", p);
953 status = 0;
954 goto bail;
955 }
956 }
957
958 status = 1;
959
960 bail:
961 mlog_exit(status);
962 return status;
963 }
964
965 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
966 {
967 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
968 unsigned long opts = osb->s_mount_opt;
969 unsigned int local_alloc_megs;
970
971 if (opts & OCFS2_MOUNT_HB_LOCAL)
972 seq_printf(s, ",_netdev,heartbeat=local");
973 else
974 seq_printf(s, ",heartbeat=none");
975
976 if (opts & OCFS2_MOUNT_NOINTR)
977 seq_printf(s, ",nointr");
978
979 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
980 seq_printf(s, ",data=writeback");
981 else
982 seq_printf(s, ",data=ordered");
983
984 if (opts & OCFS2_MOUNT_BARRIER)
985 seq_printf(s, ",barrier=1");
986
987 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
988 seq_printf(s, ",errors=panic");
989 else
990 seq_printf(s, ",errors=remount-ro");
991
992 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
993 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
994
995 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
996 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
997
998 if (osb->osb_commit_interval)
999 seq_printf(s, ",commit=%u",
1000 (unsigned) (osb->osb_commit_interval / HZ));
1001
1002 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1003 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1004 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1005
1006 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1007 seq_printf(s, ",localflocks,");
1008
1009 if (osb->osb_cluster_stack[0])
1010 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1011 osb->osb_cluster_stack);
1012
1013 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1014 seq_printf(s, ",nouser_xattr");
1015 else
1016 seq_printf(s, ",user_xattr");
1017
1018 if (opts & OCFS2_MOUNT_INODE64)
1019 seq_printf(s, ",inode64");
1020
1021 return 0;
1022 }
1023
1024 static int __init ocfs2_init(void)
1025 {
1026 int status;
1027
1028 mlog_entry_void();
1029
1030 ocfs2_print_version();
1031
1032 status = init_ocfs2_uptodate_cache();
1033 if (status < 0) {
1034 mlog_errno(status);
1035 goto leave;
1036 }
1037
1038 status = ocfs2_initialize_mem_caches();
1039 if (status < 0) {
1040 mlog_errno(status);
1041 goto leave;
1042 }
1043
1044 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1045 if (!ocfs2_wq) {
1046 status = -ENOMEM;
1047 goto leave;
1048 }
1049
1050 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1051 if (!ocfs2_debugfs_root) {
1052 status = -EFAULT;
1053 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1054 }
1055
1056 ocfs2_set_locking_protocol();
1057
1058 leave:
1059 if (status < 0) {
1060 ocfs2_free_mem_caches();
1061 exit_ocfs2_uptodate_cache();
1062 }
1063
1064 mlog_exit(status);
1065
1066 if (status >= 0) {
1067 return register_filesystem(&ocfs2_fs_type);
1068 } else
1069 return -1;
1070 }
1071
1072 static void __exit ocfs2_exit(void)
1073 {
1074 mlog_entry_void();
1075
1076 if (ocfs2_wq) {
1077 flush_workqueue(ocfs2_wq);
1078 destroy_workqueue(ocfs2_wq);
1079 }
1080
1081 debugfs_remove(ocfs2_debugfs_root);
1082
1083 ocfs2_free_mem_caches();
1084
1085 unregister_filesystem(&ocfs2_fs_type);
1086
1087 exit_ocfs2_uptodate_cache();
1088
1089 mlog_exit_void();
1090 }
1091
1092 static void ocfs2_put_super(struct super_block *sb)
1093 {
1094 mlog_entry("(0x%p)\n", sb);
1095
1096 ocfs2_sync_blockdev(sb);
1097 ocfs2_dismount_volume(sb, 0);
1098
1099 mlog_exit_void();
1100 }
1101
1102 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1103 {
1104 struct ocfs2_super *osb;
1105 u32 numbits, freebits;
1106 int status;
1107 struct ocfs2_dinode *bm_lock;
1108 struct buffer_head *bh = NULL;
1109 struct inode *inode = NULL;
1110
1111 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1112
1113 osb = OCFS2_SB(dentry->d_sb);
1114
1115 inode = ocfs2_get_system_file_inode(osb,
1116 GLOBAL_BITMAP_SYSTEM_INODE,
1117 OCFS2_INVALID_SLOT);
1118 if (!inode) {
1119 mlog(ML_ERROR, "failed to get bitmap inode\n");
1120 status = -EIO;
1121 goto bail;
1122 }
1123
1124 status = ocfs2_inode_lock(inode, &bh, 0);
1125 if (status < 0) {
1126 mlog_errno(status);
1127 goto bail;
1128 }
1129
1130 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1131
1132 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1133 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1134
1135 buf->f_type = OCFS2_SUPER_MAGIC;
1136 buf->f_bsize = dentry->d_sb->s_blocksize;
1137 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1138 buf->f_blocks = ((sector_t) numbits) *
1139 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1140 buf->f_bfree = ((sector_t) freebits) *
1141 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1142 buf->f_bavail = buf->f_bfree;
1143 buf->f_files = numbits;
1144 buf->f_ffree = freebits;
1145
1146 brelse(bh);
1147
1148 ocfs2_inode_unlock(inode, 0);
1149 status = 0;
1150 bail:
1151 if (inode)
1152 iput(inode);
1153
1154 mlog_exit(status);
1155
1156 return status;
1157 }
1158
1159 static void ocfs2_inode_init_once(void *data)
1160 {
1161 struct ocfs2_inode_info *oi = data;
1162
1163 oi->ip_flags = 0;
1164 oi->ip_open_count = 0;
1165 spin_lock_init(&oi->ip_lock);
1166 ocfs2_extent_map_init(&oi->vfs_inode);
1167 INIT_LIST_HEAD(&oi->ip_io_markers);
1168 oi->ip_created_trans = 0;
1169 oi->ip_last_trans = 0;
1170 oi->ip_dir_start_lookup = 0;
1171
1172 init_rwsem(&oi->ip_alloc_sem);
1173 init_rwsem(&oi->ip_xattr_sem);
1174 mutex_init(&oi->ip_io_mutex);
1175
1176 oi->ip_blkno = 0ULL;
1177 oi->ip_clusters = 0;
1178
1179 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1180 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1181 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1182
1183 ocfs2_metadata_cache_init(&oi->vfs_inode);
1184
1185 inode_init_once(&oi->vfs_inode);
1186 }
1187
1188 static int ocfs2_initialize_mem_caches(void)
1189 {
1190 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1191 sizeof(struct ocfs2_inode_info),
1192 0,
1193 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1194 SLAB_MEM_SPREAD),
1195 ocfs2_inode_init_once);
1196 if (!ocfs2_inode_cachep)
1197 return -ENOMEM;
1198
1199 return 0;
1200 }
1201
1202 static void ocfs2_free_mem_caches(void)
1203 {
1204 if (ocfs2_inode_cachep)
1205 kmem_cache_destroy(ocfs2_inode_cachep);
1206
1207 ocfs2_inode_cachep = NULL;
1208 }
1209
1210 static int ocfs2_get_sector(struct super_block *sb,
1211 struct buffer_head **bh,
1212 int block,
1213 int sect_size)
1214 {
1215 if (!sb_set_blocksize(sb, sect_size)) {
1216 mlog(ML_ERROR, "unable to set blocksize\n");
1217 return -EIO;
1218 }
1219
1220 *bh = sb_getblk(sb, block);
1221 if (!*bh) {
1222 mlog_errno(-EIO);
1223 return -EIO;
1224 }
1225 lock_buffer(*bh);
1226 if (!buffer_dirty(*bh))
1227 clear_buffer_uptodate(*bh);
1228 unlock_buffer(*bh);
1229 ll_rw_block(READ, 1, bh);
1230 wait_on_buffer(*bh);
1231 return 0;
1232 }
1233
1234 static int ocfs2_mount_volume(struct super_block *sb)
1235 {
1236 int status = 0;
1237 int unlock_super = 0;
1238 struct ocfs2_super *osb = OCFS2_SB(sb);
1239
1240 mlog_entry_void();
1241
1242 if (ocfs2_is_hard_readonly(osb))
1243 goto leave;
1244
1245 status = ocfs2_dlm_init(osb);
1246 if (status < 0) {
1247 mlog_errno(status);
1248 goto leave;
1249 }
1250
1251 status = ocfs2_super_lock(osb, 1);
1252 if (status < 0) {
1253 mlog_errno(status);
1254 goto leave;
1255 }
1256 unlock_super = 1;
1257
1258 /* This will load up the node map and add ourselves to it. */
1259 status = ocfs2_find_slot(osb);
1260 if (status < 0) {
1261 mlog_errno(status);
1262 goto leave;
1263 }
1264
1265 /* load all node-local system inodes */
1266 status = ocfs2_init_local_system_inodes(osb);
1267 if (status < 0) {
1268 mlog_errno(status);
1269 goto leave;
1270 }
1271
1272 status = ocfs2_check_volume(osb);
1273 if (status < 0) {
1274 mlog_errno(status);
1275 goto leave;
1276 }
1277
1278 status = ocfs2_truncate_log_init(osb);
1279 if (status < 0) {
1280 mlog_errno(status);
1281 goto leave;
1282 }
1283
1284 if (ocfs2_mount_local(osb))
1285 goto leave;
1286
1287 leave:
1288 if (unlock_super)
1289 ocfs2_super_unlock(osb, 1);
1290
1291 mlog_exit(status);
1292 return status;
1293 }
1294
1295 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1296 {
1297 int tmp, hangup_needed = 0;
1298 struct ocfs2_super *osb = NULL;
1299 char nodestr[8];
1300
1301 mlog_entry("(0x%p)\n", sb);
1302
1303 BUG_ON(!sb);
1304 osb = OCFS2_SB(sb);
1305 BUG_ON(!osb);
1306
1307 ocfs2_shutdown_local_alloc(osb);
1308
1309 ocfs2_truncate_log_shutdown(osb);
1310
1311 /* This will disable recovery and flush any recovery work. */
1312 ocfs2_recovery_exit(osb);
1313
1314 ocfs2_journal_shutdown(osb);
1315
1316 ocfs2_sync_blockdev(sb);
1317
1318 /* No cluster connection means we've failed during mount, so skip
1319 * all the steps which depended on that to complete. */
1320 if (osb->cconn) {
1321 tmp = ocfs2_super_lock(osb, 1);
1322 if (tmp < 0) {
1323 mlog_errno(tmp);
1324 return;
1325 }
1326 }
1327
1328 if (osb->slot_num != OCFS2_INVALID_SLOT)
1329 ocfs2_put_slot(osb);
1330
1331 if (osb->cconn)
1332 ocfs2_super_unlock(osb, 1);
1333
1334 ocfs2_release_system_inodes(osb);
1335
1336 /*
1337 * If we're dismounting due to mount error, mount.ocfs2 will clean
1338 * up heartbeat. If we're a local mount, there is no heartbeat.
1339 * If we failed before we got a uuid_str yet, we can't stop
1340 * heartbeat. Otherwise, do it.
1341 */
1342 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1343 hangup_needed = 1;
1344
1345 if (osb->cconn)
1346 ocfs2_dlm_shutdown(osb, hangup_needed);
1347
1348 debugfs_remove(osb->osb_debug_root);
1349
1350 if (hangup_needed)
1351 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1352
1353 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1354
1355 if (ocfs2_mount_local(osb))
1356 snprintf(nodestr, sizeof(nodestr), "local");
1357 else
1358 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1359
1360 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1361 osb->dev_str, nodestr);
1362
1363 ocfs2_delete_osb(osb);
1364 kfree(osb);
1365 sb->s_dev = 0;
1366 sb->s_fs_info = NULL;
1367 }
1368
1369 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1370 unsigned uuid_bytes)
1371 {
1372 int i, ret;
1373 char *ptr;
1374
1375 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1376
1377 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1378 if (osb->uuid_str == NULL)
1379 return -ENOMEM;
1380
1381 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1382 /* print with null */
1383 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1384 if (ret != 2) /* drop super cleans up */
1385 return -EINVAL;
1386 /* then only advance past the last char */
1387 ptr += 2;
1388 }
1389
1390 return 0;
1391 }
1392
1393 static int ocfs2_initialize_super(struct super_block *sb,
1394 struct buffer_head *bh,
1395 int sector_size)
1396 {
1397 int status;
1398 int i, cbits, bbits;
1399 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1400 struct inode *inode = NULL;
1401 struct ocfs2_journal *journal;
1402 __le32 uuid_net_key;
1403 struct ocfs2_super *osb;
1404
1405 mlog_entry_void();
1406
1407 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1408 if (!osb) {
1409 status = -ENOMEM;
1410 mlog_errno(status);
1411 goto bail;
1412 }
1413
1414 sb->s_fs_info = osb;
1415 sb->s_op = &ocfs2_sops;
1416 sb->s_export_op = &ocfs2_export_ops;
1417 sb->s_xattr = ocfs2_xattr_handlers;
1418 sb->s_time_gran = 1;
1419 sb->s_flags |= MS_NOATIME;
1420 /* this is needed to support O_LARGEFILE */
1421 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1422 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1423 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1424
1425 osb->sb = sb;
1426 /* Save off for ocfs2_rw_direct */
1427 osb->s_sectsize_bits = blksize_bits(sector_size);
1428 BUG_ON(!osb->s_sectsize_bits);
1429
1430 spin_lock_init(&osb->dc_task_lock);
1431 init_waitqueue_head(&osb->dc_event);
1432 osb->dc_work_sequence = 0;
1433 osb->dc_wake_sequence = 0;
1434 INIT_LIST_HEAD(&osb->blocked_lock_list);
1435 osb->blocked_lock_count = 0;
1436 spin_lock_init(&osb->osb_lock);
1437 ocfs2_init_inode_steal_slot(osb);
1438
1439 atomic_set(&osb->alloc_stats.moves, 0);
1440 atomic_set(&osb->alloc_stats.local_data, 0);
1441 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1442 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1443 atomic_set(&osb->alloc_stats.bg_extends, 0);
1444
1445 ocfs2_init_node_maps(osb);
1446
1447 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1448 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1449
1450 status = ocfs2_recovery_init(osb);
1451 if (status) {
1452 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1453 mlog_errno(status);
1454 goto bail;
1455 }
1456
1457 init_waitqueue_head(&osb->checkpoint_event);
1458 atomic_set(&osb->needs_checkpoint, 0);
1459
1460 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1461
1462 osb->slot_num = OCFS2_INVALID_SLOT;
1463
1464 osb->s_xattr_inline_size = le16_to_cpu(
1465 di->id2.i_super.s_xattr_inline_size);
1466
1467 osb->local_alloc_state = OCFS2_LA_UNUSED;
1468 osb->local_alloc_bh = NULL;
1469 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
1470
1471 init_waitqueue_head(&osb->osb_mount_event);
1472
1473 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1474 if (!osb->vol_label) {
1475 mlog(ML_ERROR, "unable to alloc vol label\n");
1476 status = -ENOMEM;
1477 goto bail;
1478 }
1479
1480 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1481 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1482 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1483 osb->max_slots);
1484 status = -EINVAL;
1485 goto bail;
1486 }
1487 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1488
1489 osb->slot_recovery_generations =
1490 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1491 GFP_KERNEL);
1492 if (!osb->slot_recovery_generations) {
1493 status = -ENOMEM;
1494 mlog_errno(status);
1495 goto bail;
1496 }
1497
1498 init_waitqueue_head(&osb->osb_wipe_event);
1499 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1500 sizeof(*osb->osb_orphan_wipes),
1501 GFP_KERNEL);
1502 if (!osb->osb_orphan_wipes) {
1503 status = -ENOMEM;
1504 mlog_errno(status);
1505 goto bail;
1506 }
1507
1508 osb->s_feature_compat =
1509 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1510 osb->s_feature_ro_compat =
1511 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1512 osb->s_feature_incompat =
1513 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1514
1515 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1516 mlog(ML_ERROR, "couldn't mount because of unsupported "
1517 "optional features (%x).\n", i);
1518 status = -EINVAL;
1519 goto bail;
1520 }
1521 if (!(osb->sb->s_flags & MS_RDONLY) &&
1522 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1523 mlog(ML_ERROR, "couldn't mount RDWR because of "
1524 "unsupported optional features (%x).\n", i);
1525 status = -EINVAL;
1526 goto bail;
1527 }
1528
1529 if (ocfs2_userspace_stack(osb)) {
1530 memcpy(osb->osb_cluster_stack,
1531 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1532 OCFS2_STACK_LABEL_LEN);
1533 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1534 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1535 mlog(ML_ERROR,
1536 "couldn't mount because of an invalid "
1537 "cluster stack label (%s) \n",
1538 osb->osb_cluster_stack);
1539 status = -EINVAL;
1540 goto bail;
1541 }
1542 } else {
1543 /* The empty string is identical with classic tools that
1544 * don't know about s_cluster_info. */
1545 osb->osb_cluster_stack[0] = '\0';
1546 }
1547
1548 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1549
1550 /* FIXME
1551 * This should be done in ocfs2_journal_init(), but unknown
1552 * ordering issues will cause the filesystem to crash.
1553 * If anyone wants to figure out what part of the code
1554 * refers to osb->journal before ocfs2_journal_init() is run,
1555 * be my guest.
1556 */
1557 /* initialize our journal structure */
1558
1559 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
1560 if (!journal) {
1561 mlog(ML_ERROR, "unable to alloc journal\n");
1562 status = -ENOMEM;
1563 goto bail;
1564 }
1565 osb->journal = journal;
1566 journal->j_osb = osb;
1567
1568 atomic_set(&journal->j_num_trans, 0);
1569 init_rwsem(&journal->j_trans_barrier);
1570 init_waitqueue_head(&journal->j_checkpointed);
1571 spin_lock_init(&journal->j_lock);
1572 journal->j_trans_id = (unsigned long) 1;
1573 INIT_LIST_HEAD(&journal->j_la_cleanups);
1574 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1575 journal->j_state = OCFS2_JOURNAL_FREE;
1576
1577 /* get some pseudo constants for clustersize bits */
1578 osb->s_clustersize_bits =
1579 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1580 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1581 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1582
1583 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1584 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1585 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1586 osb->s_clustersize);
1587 status = -EINVAL;
1588 goto bail;
1589 }
1590
1591 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1592 > (u32)~0UL) {
1593 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1594 "what jbd can address in 32 bits.\n");
1595 status = -EINVAL;
1596 goto bail;
1597 }
1598
1599 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1600 sizeof(di->id2.i_super.s_uuid))) {
1601 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1602 status = -ENOMEM;
1603 goto bail;
1604 }
1605
1606 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1607
1608 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1609 osb->vol_label[63] = '\0';
1610 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1611 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1612 osb->first_cluster_group_blkno =
1613 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1614 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1615 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1616 mlog(0, "vol_label: %s\n", osb->vol_label);
1617 mlog(0, "uuid: %s\n", osb->uuid_str);
1618 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1619 (unsigned long long)osb->root_blkno,
1620 (unsigned long long)osb->system_dir_blkno);
1621
1622 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1623 if (!osb->osb_dlm_debug) {
1624 status = -ENOMEM;
1625 mlog_errno(status);
1626 goto bail;
1627 }
1628
1629 atomic_set(&osb->vol_state, VOLUME_INIT);
1630
1631 /* load root, system_dir, and all global system inodes */
1632 status = ocfs2_init_global_system_inodes(osb);
1633 if (status < 0) {
1634 mlog_errno(status);
1635 goto bail;
1636 }
1637
1638 /*
1639 * global bitmap
1640 */
1641 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1642 OCFS2_INVALID_SLOT);
1643 if (!inode) {
1644 status = -EINVAL;
1645 mlog_errno(status);
1646 goto bail;
1647 }
1648
1649 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1650 iput(inode);
1651
1652 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
1653
1654 status = ocfs2_init_slot_info(osb);
1655 if (status < 0) {
1656 mlog_errno(status);
1657 goto bail;
1658 }
1659
1660 bail:
1661 mlog_exit(status);
1662 return status;
1663 }
1664
1665 /*
1666 * will return: -EAGAIN if it is ok to keep searching for superblocks
1667 * -EINVAL if there is a bad superblock
1668 * 0 on success
1669 */
1670 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1671 struct buffer_head *bh,
1672 u32 blksz)
1673 {
1674 int status = -EAGAIN;
1675
1676 mlog_entry_void();
1677
1678 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1679 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1680 status = -EINVAL;
1681 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
1682 mlog(ML_ERROR, "found superblock with incorrect block "
1683 "size: found %u, should be %u\n",
1684 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
1685 blksz);
1686 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
1687 OCFS2_MAJOR_REV_LEVEL ||
1688 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
1689 OCFS2_MINOR_REV_LEVEL) {
1690 mlog(ML_ERROR, "found superblock with bad version: "
1691 "found %u.%u, should be %u.%u\n",
1692 le16_to_cpu(di->id2.i_super.s_major_rev_level),
1693 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
1694 OCFS2_MAJOR_REV_LEVEL,
1695 OCFS2_MINOR_REV_LEVEL);
1696 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
1697 mlog(ML_ERROR, "bad block number on superblock: "
1698 "found %llu, should be %llu\n",
1699 (unsigned long long)le64_to_cpu(di->i_blkno),
1700 (unsigned long long)bh->b_blocknr);
1701 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
1702 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
1703 mlog(ML_ERROR, "bad cluster size found: %u\n",
1704 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
1705 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
1706 mlog(ML_ERROR, "bad root_blkno: 0\n");
1707 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
1708 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
1709 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
1710 mlog(ML_ERROR,
1711 "Superblock slots found greater than file system "
1712 "maximum: found %u, max %u\n",
1713 le16_to_cpu(di->id2.i_super.s_max_slots),
1714 OCFS2_MAX_SLOTS);
1715 } else {
1716 /* found it! */
1717 status = 0;
1718 }
1719 }
1720
1721 mlog_exit(status);
1722 return status;
1723 }
1724
1725 static int ocfs2_check_volume(struct ocfs2_super *osb)
1726 {
1727 int status;
1728 int dirty;
1729 int local;
1730 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
1731 * recover
1732 * ourselves. */
1733
1734 mlog_entry_void();
1735
1736 /* Init our journal object. */
1737 status = ocfs2_journal_init(osb->journal, &dirty);
1738 if (status < 0) {
1739 mlog(ML_ERROR, "Could not initialize journal!\n");
1740 goto finally;
1741 }
1742
1743 /* If the journal was unmounted cleanly then we don't want to
1744 * recover anything. Otherwise, journal_load will do that
1745 * dirty work for us :) */
1746 if (!dirty) {
1747 status = ocfs2_journal_wipe(osb->journal, 0);
1748 if (status < 0) {
1749 mlog_errno(status);
1750 goto finally;
1751 }
1752 } else {
1753 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
1754 "recovering volume.\n");
1755 }
1756
1757 local = ocfs2_mount_local(osb);
1758
1759 /* will play back anything left in the journal. */
1760 status = ocfs2_journal_load(osb->journal, local, dirty);
1761 if (status < 0) {
1762 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
1763 goto finally;
1764 }
1765
1766 if (dirty) {
1767 /* recover my local alloc if we didn't unmount cleanly. */
1768 status = ocfs2_begin_local_alloc_recovery(osb,
1769 osb->slot_num,
1770 &local_alloc);
1771 if (status < 0) {
1772 mlog_errno(status);
1773 goto finally;
1774 }
1775 /* we complete the recovery process after we've marked
1776 * ourselves as mounted. */
1777 }
1778
1779 mlog(0, "Journal loaded.\n");
1780
1781 status = ocfs2_load_local_alloc(osb);
1782 if (status < 0) {
1783 mlog_errno(status);
1784 goto finally;
1785 }
1786
1787 if (dirty) {
1788 /* Recovery will be completed after we've mounted the
1789 * rest of the volume. */
1790 osb->dirty = 1;
1791 osb->local_alloc_copy = local_alloc;
1792 local_alloc = NULL;
1793 }
1794
1795 /* go through each journal, trylock it and if you get the
1796 * lock, and it's marked as dirty, set the bit in the recover
1797 * map and launch a recovery thread for it. */
1798 status = ocfs2_mark_dead_nodes(osb);
1799 if (status < 0)
1800 mlog_errno(status);
1801
1802 finally:
1803 if (local_alloc)
1804 kfree(local_alloc);
1805
1806 mlog_exit(status);
1807 return status;
1808 }
1809
1810 /*
1811 * The routine gets called from dismount or close whenever a dismount on
1812 * volume is requested and the osb open count becomes 1.
1813 * It will remove the osb from the global list and also free up all the
1814 * initialized resources and fileobject.
1815 */
1816 static void ocfs2_delete_osb(struct ocfs2_super *osb)
1817 {
1818 mlog_entry_void();
1819
1820 /* This function assumes that the caller has the main osb resource */
1821
1822 ocfs2_free_slot_info(osb);
1823
1824 kfree(osb->osb_orphan_wipes);
1825 kfree(osb->slot_recovery_generations);
1826 /* FIXME
1827 * This belongs in journal shutdown, but because we have to
1828 * allocate osb->journal at the start of ocfs2_initalize_osb(),
1829 * we free it here.
1830 */
1831 kfree(osb->journal);
1832 if (osb->local_alloc_copy)
1833 kfree(osb->local_alloc_copy);
1834 kfree(osb->uuid_str);
1835 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
1836 memset(osb, 0, sizeof(struct ocfs2_super));
1837
1838 mlog_exit_void();
1839 }
1840
1841 /* Put OCFS2 into a readonly state, or (if the user specifies it),
1842 * panic(). We do not support continue-on-error operation. */
1843 static void ocfs2_handle_error(struct super_block *sb)
1844 {
1845 struct ocfs2_super *osb = OCFS2_SB(sb);
1846
1847 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
1848 panic("OCFS2: (device %s): panic forced after error\n",
1849 sb->s_id);
1850
1851 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
1852
1853 if (sb->s_flags & MS_RDONLY &&
1854 (ocfs2_is_soft_readonly(osb) ||
1855 ocfs2_is_hard_readonly(osb)))
1856 return;
1857
1858 printk(KERN_CRIT "File system is now read-only due to the potential "
1859 "of on-disk corruption. Please run fsck.ocfs2 once the file "
1860 "system is unmounted.\n");
1861 sb->s_flags |= MS_RDONLY;
1862 ocfs2_set_ro_flag(osb, 0);
1863 }
1864
1865 static char error_buf[1024];
1866
1867 void __ocfs2_error(struct super_block *sb,
1868 const char *function,
1869 const char *fmt, ...)
1870 {
1871 va_list args;
1872
1873 va_start(args, fmt);
1874 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1875 va_end(args);
1876
1877 /* Not using mlog here because we want to show the actual
1878 * function the error came from. */
1879 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
1880 sb->s_id, function, error_buf);
1881
1882 ocfs2_handle_error(sb);
1883 }
1884
1885 /* Handle critical errors. This is intentionally more drastic than
1886 * ocfs2_handle_error, so we only use for things like journal errors,
1887 * etc. */
1888 void __ocfs2_abort(struct super_block* sb,
1889 const char *function,
1890 const char *fmt, ...)
1891 {
1892 va_list args;
1893
1894 va_start(args, fmt);
1895 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1896 va_end(args);
1897
1898 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
1899 sb->s_id, function, error_buf);
1900
1901 /* We don't have the cluster support yet to go straight to
1902 * hard readonly in here. Until then, we want to keep
1903 * ocfs2_abort() so that we can at least mark critical
1904 * errors.
1905 *
1906 * TODO: This should abort the journal and alert other nodes
1907 * that our slot needs recovery. */
1908
1909 /* Force a panic(). This stinks, but it's better than letting
1910 * things continue without having a proper hard readonly
1911 * here. */
1912 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1913 ocfs2_handle_error(sb);
1914 }
1915
1916 module_init(ocfs2_init);
1917 module_exit(ocfs2_exit);
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