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PCI hotplug: fakephp: Allocate PCI resources before adding the device
[linux-2.6/mini2440.git] / fs / ocfs2 / super.c
blob43ed11345b59fdf7ac8c00596b14491a4e89eb20
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 #include <linux/quotaops.h>
45
46 #define MLOG_MASK_PREFIX ML_SUPER
47 #include <cluster/masklog.h>
48
49 #include "ocfs2.h"
50
51 /* this should be the only file to include a version 1 header */
52 #include "ocfs1_fs_compat.h"
53
54 #include "alloc.h"
55 #include "blockcheck.h"
56 #include "dlmglue.h"
57 #include "export.h"
58 #include "extent_map.h"
59 #include "heartbeat.h"
60 #include "inode.h"
61 #include "journal.h"
62 #include "localalloc.h"
63 #include "namei.h"
64 #include "slot_map.h"
65 #include "super.h"
66 #include "sysfile.h"
67 #include "uptodate.h"
68 #include "ver.h"
69 #include "xattr.h"
70 #include "quota.h"
71
72 #include "buffer_head_io.h"
73
74 static struct kmem_cache *ocfs2_inode_cachep = NULL;
75 struct kmem_cache *ocfs2_dquot_cachep;
76 struct kmem_cache *ocfs2_qf_chunk_cachep;
77
78 /* OCFS2 needs to schedule several differnt types of work which
79 * require cluster locking, disk I/O, recovery waits, etc. Since these
80 * types of work tend to be heavy we avoid using the kernel events
81 * workqueue and schedule on our own. */
82 struct workqueue_struct *ocfs2_wq = NULL;
83
84 static struct dentry *ocfs2_debugfs_root = NULL;
85
86 MODULE_AUTHOR("Oracle");
87 MODULE_LICENSE("GPL");
88
89 struct mount_options
90 {
91 unsigned long commit_interval;
92 unsigned long mount_opt;
93 unsigned int atime_quantum;
94 signed short slot;
95 unsigned int localalloc_opt;
96 char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
97 };
98
99 static int ocfs2_parse_options(struct super_block *sb, char *options,
100 struct mount_options *mopt,
101 int is_remount);
102 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
103 static void ocfs2_put_super(struct super_block *sb);
104 static int ocfs2_mount_volume(struct super_block *sb);
105 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
106 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
107 static int ocfs2_initialize_mem_caches(void);
108 static void ocfs2_free_mem_caches(void);
109 static void ocfs2_delete_osb(struct ocfs2_super *osb);
110
111 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
112
113 static int ocfs2_sync_fs(struct super_block *sb, int wait);
114
115 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
116 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
117 static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
118 static int ocfs2_check_volume(struct ocfs2_super *osb);
119 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
120 struct buffer_head *bh,
121 u32 sectsize);
122 static int ocfs2_initialize_super(struct super_block *sb,
123 struct buffer_head *bh,
124 int sector_size);
125 static int ocfs2_get_sector(struct super_block *sb,
126 struct buffer_head **bh,
127 int block,
128 int sect_size);
129 static void ocfs2_write_super(struct super_block *sb);
130 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
131 static void ocfs2_destroy_inode(struct inode *inode);
132 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
133 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
134 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
135
136 static const struct super_operations ocfs2_sops = {
137 .statfs = ocfs2_statfs,
138 .alloc_inode = ocfs2_alloc_inode,
139 .destroy_inode = ocfs2_destroy_inode,
140 .drop_inode = ocfs2_drop_inode,
141 .clear_inode = ocfs2_clear_inode,
142 .delete_inode = ocfs2_delete_inode,
143 .sync_fs = ocfs2_sync_fs,
144 .write_super = ocfs2_write_super,
145 .put_super = ocfs2_put_super,
146 .remount_fs = ocfs2_remount,
147 .show_options = ocfs2_show_options,
148 .quota_read = ocfs2_quota_read,
149 .quota_write = ocfs2_quota_write,
150 };
151
152 enum {
153 Opt_barrier,
154 Opt_err_panic,
155 Opt_err_ro,
156 Opt_intr,
157 Opt_nointr,
158 Opt_hb_none,
159 Opt_hb_local,
160 Opt_data_ordered,
161 Opt_data_writeback,
162 Opt_atime_quantum,
163 Opt_slot,
164 Opt_commit,
165 Opt_localalloc,
166 Opt_localflocks,
167 Opt_stack,
168 Opt_user_xattr,
169 Opt_nouser_xattr,
170 Opt_inode64,
171 Opt_acl,
172 Opt_noacl,
173 Opt_usrquota,
174 Opt_grpquota,
175 Opt_err,
176 };
177
178 static const match_table_t tokens = {
179 {Opt_barrier, "barrier=%u"},
180 {Opt_err_panic, "errors=panic"},
181 {Opt_err_ro, "errors=remount-ro"},
182 {Opt_intr, "intr"},
183 {Opt_nointr, "nointr"},
184 {Opt_hb_none, OCFS2_HB_NONE},
185 {Opt_hb_local, OCFS2_HB_LOCAL},
186 {Opt_data_ordered, "data=ordered"},
187 {Opt_data_writeback, "data=writeback"},
188 {Opt_atime_quantum, "atime_quantum=%u"},
189 {Opt_slot, "preferred_slot=%u"},
190 {Opt_commit, "commit=%u"},
191 {Opt_localalloc, "localalloc=%d"},
192 {Opt_localflocks, "localflocks"},
193 {Opt_stack, "cluster_stack=%s"},
194 {Opt_user_xattr, "user_xattr"},
195 {Opt_nouser_xattr, "nouser_xattr"},
196 {Opt_inode64, "inode64"},
197 {Opt_acl, "acl"},
198 {Opt_noacl, "noacl"},
199 {Opt_usrquota, "usrquota"},
200 {Opt_grpquota, "grpquota"},
201 {Opt_err, NULL}
202 };
203
204 /*
205 * write_super and sync_fs ripped right out of ext3.
206 */
207 static void ocfs2_write_super(struct super_block *sb)
208 {
209 if (mutex_trylock(&sb->s_lock) != 0)
210 BUG();
211 sb->s_dirt = 0;
212 }
213
214 static int ocfs2_sync_fs(struct super_block *sb, int wait)
215 {
216 int status;
217 tid_t target;
218 struct ocfs2_super *osb = OCFS2_SB(sb);
219
220 sb->s_dirt = 0;
221
222 if (ocfs2_is_hard_readonly(osb))
223 return -EROFS;
224
225 if (wait) {
226 status = ocfs2_flush_truncate_log(osb);
227 if (status < 0)
228 mlog_errno(status);
229 } else {
230 ocfs2_schedule_truncate_log_flush(osb, 0);
231 }
232
233 if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
234 &target)) {
235 if (wait)
236 jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
237 target);
238 }
239 return 0;
240 }
241
242 static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
243 {
244 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
245 && (ino == USER_QUOTA_SYSTEM_INODE
246 || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
247 return 0;
248 if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
249 && (ino == GROUP_QUOTA_SYSTEM_INODE
250 || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
251 return 0;
252 return 1;
253 }
254
255 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
256 {
257 struct inode *new = NULL;
258 int status = 0;
259 int i;
260
261 mlog_entry_void();
262
263 new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
264 if (IS_ERR(new)) {
265 status = PTR_ERR(new);
266 mlog_errno(status);
267 goto bail;
268 }
269 osb->root_inode = new;
270
271 new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
272 if (IS_ERR(new)) {
273 status = PTR_ERR(new);
274 mlog_errno(status);
275 goto bail;
276 }
277 osb->sys_root_inode = new;
278
279 for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
280 i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
281 if (!ocfs2_need_system_inode(osb, i))
282 continue;
283 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
284 if (!new) {
285 ocfs2_release_system_inodes(osb);
286 status = -EINVAL;
287 mlog_errno(status);
288 /* FIXME: Should ERROR_RO_FS */
289 mlog(ML_ERROR, "Unable to load system inode %d, "
290 "possibly corrupt fs?", i);
291 goto bail;
292 }
293 // the array now has one ref, so drop this one
294 iput(new);
295 }
296
297 bail:
298 mlog_exit(status);
299 return status;
300 }
301
302 static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
303 {
304 struct inode *new = NULL;
305 int status = 0;
306 int i;
307
308 mlog_entry_void();
309
310 for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
311 i < NUM_SYSTEM_INODES;
312 i++) {
313 if (!ocfs2_need_system_inode(osb, i))
314 continue;
315 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
316 if (!new) {
317 ocfs2_release_system_inodes(osb);
318 status = -EINVAL;
319 mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
320 status, i, osb->slot_num);
321 goto bail;
322 }
323 /* the array now has one ref, so drop this one */
324 iput(new);
325 }
326
327 bail:
328 mlog_exit(status);
329 return status;
330 }
331
332 static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
333 {
334 int i;
335 struct inode *inode;
336
337 mlog_entry_void();
338
339 for (i = 0; i < NUM_SYSTEM_INODES; i++) {
340 inode = osb->system_inodes[i];
341 if (inode) {
342 iput(inode);
343 osb->system_inodes[i] = NULL;
344 }
345 }
346
347 inode = osb->sys_root_inode;
348 if (inode) {
349 iput(inode);
350 osb->sys_root_inode = NULL;
351 }
352
353 inode = osb->root_inode;
354 if (inode) {
355 iput(inode);
356 osb->root_inode = NULL;
357 }
358
359 mlog_exit(0);
360 }
361
362 /* We're allocating fs objects, use GFP_NOFS */
363 static struct inode *ocfs2_alloc_inode(struct super_block *sb)
364 {
365 struct ocfs2_inode_info *oi;
366
367 oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
368 if (!oi)
369 return NULL;
370
371 jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
372 return &oi->vfs_inode;
373 }
374
375 static void ocfs2_destroy_inode(struct inode *inode)
376 {
377 kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
378 }
379
380 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
381 unsigned int cbits)
382 {
383 unsigned int bytes = 1 << cbits;
384 unsigned int trim = bytes;
385 unsigned int bitshift = 32;
386
387 /*
388 * i_size and all block offsets in ocfs2 are always 64 bits
389 * wide. i_clusters is 32 bits, in cluster-sized units. So on
390 * 64 bit platforms, cluster size will be the limiting factor.
391 */
392
393 #if BITS_PER_LONG == 32
394 # if defined(CONFIG_LBD)
395 BUILD_BUG_ON(sizeof(sector_t) != 8);
396 /*
397 * We might be limited by page cache size.
398 */
399 if (bytes > PAGE_CACHE_SIZE) {
400 bytes = PAGE_CACHE_SIZE;
401 trim = 1;
402 /*
403 * Shift by 31 here so that we don't get larger than
404 * MAX_LFS_FILESIZE
405 */
406 bitshift = 31;
407 }
408 # else
409 /*
410 * We are limited by the size of sector_t. Use block size, as
411 * that's what we expose to the VFS.
412 */
413 bytes = 1 << bbits;
414 trim = 1;
415 bitshift = 31;
416 # endif
417 #endif
418
419 /*
420 * Trim by a whole cluster when we can actually approach the
421 * on-disk limits. Otherwise we can overflow i_clusters when
422 * an extent start is at the max offset.
423 */
424 return (((unsigned long long)bytes) << bitshift) - trim;
425 }
426
427 static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
428 {
429 int incompat_features;
430 int ret = 0;
431 struct mount_options parsed_options;
432 struct ocfs2_super *osb = OCFS2_SB(sb);
433
434 if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
435 ret = -EINVAL;
436 goto out;
437 }
438
439 if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
440 (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
441 ret = -EINVAL;
442 mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
443 goto out;
444 }
445
446 if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
447 (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
448 ret = -EINVAL;
449 mlog(ML_ERROR, "Cannot change data mode on remount\n");
450 goto out;
451 }
452
453 /* Probably don't want this on remount; it might
454 * mess with other nodes */
455 if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
456 (parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
457 ret = -EINVAL;
458 mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
459 goto out;
460 }
461
462 /* We're going to/from readonly mode. */
463 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
464 /* Disable quota accounting before remounting RO */
465 if (*flags & MS_RDONLY) {
466 ret = ocfs2_susp_quotas(osb, 0);
467 if (ret < 0)
468 goto out;
469 }
470 /* Lock here so the check of HARD_RO and the potential
471 * setting of SOFT_RO is atomic. */
472 spin_lock(&osb->osb_lock);
473 if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
474 mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
475 ret = -EROFS;
476 goto unlock_osb;
477 }
478
479 if (*flags & MS_RDONLY) {
480 mlog(0, "Going to ro mode.\n");
481 sb->s_flags |= MS_RDONLY;
482 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
483 } else {
484 mlog(0, "Making ro filesystem writeable.\n");
485
486 if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
487 mlog(ML_ERROR, "Cannot remount RDWR "
488 "filesystem due to previous errors.\n");
489 ret = -EROFS;
490 goto unlock_osb;
491 }
492 incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
493 if (incompat_features) {
494 mlog(ML_ERROR, "Cannot remount RDWR because "
495 "of unsupported optional features "
496 "(%x).\n", incompat_features);
497 ret = -EINVAL;
498 goto unlock_osb;
499 }
500 sb->s_flags &= ~MS_RDONLY;
501 osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
502 }
503 unlock_osb:
504 spin_unlock(&osb->osb_lock);
505 /* Enable quota accounting after remounting RW */
506 if (!ret && !(*flags & MS_RDONLY)) {
507 if (sb_any_quota_suspended(sb))
508 ret = ocfs2_susp_quotas(osb, 1);
509 else
510 ret = ocfs2_enable_quotas(osb);
511 if (ret < 0) {
512 /* Return back changes... */
513 spin_lock(&osb->osb_lock);
514 sb->s_flags |= MS_RDONLY;
515 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
516 spin_unlock(&osb->osb_lock);
517 goto out;
518 }
519 }
520 }
521
522 if (!ret) {
523 /* Only save off the new mount options in case of a successful
524 * remount. */
525 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
526 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
527 osb->s_mount_opt = parsed_options.mount_opt;
528 osb->s_atime_quantum = parsed_options.atime_quantum;
529 osb->preferred_slot = parsed_options.slot;
530 if (parsed_options.commit_interval)
531 osb->osb_commit_interval = parsed_options.commit_interval;
532
533 if (!ocfs2_is_hard_readonly(osb))
534 ocfs2_set_journal_params(osb);
535 }
536 out:
537 return ret;
538 }
539
540 static int ocfs2_sb_probe(struct super_block *sb,
541 struct buffer_head **bh,
542 int *sector_size)
543 {
544 int status, tmpstat;
545 struct ocfs1_vol_disk_hdr *hdr;
546 struct ocfs2_dinode *di;
547 int blksize;
548
549 *bh = NULL;
550
551 /* may be > 512 */
552 *sector_size = bdev_hardsect_size(sb->s_bdev);
553 if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
554 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
555 *sector_size, OCFS2_MAX_BLOCKSIZE);
556 status = -EINVAL;
557 goto bail;
558 }
559
560 /* Can this really happen? */
561 if (*sector_size < OCFS2_MIN_BLOCKSIZE)
562 *sector_size = OCFS2_MIN_BLOCKSIZE;
563
564 /* check block zero for old format */
565 status = ocfs2_get_sector(sb, bh, 0, *sector_size);
566 if (status < 0) {
567 mlog_errno(status);
568 goto bail;
569 }
570 hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
571 if (hdr->major_version == OCFS1_MAJOR_VERSION) {
572 mlog(ML_ERROR, "incompatible version: %u.%u\n",
573 hdr->major_version, hdr->minor_version);
574 status = -EINVAL;
575 }
576 if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
577 strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
578 mlog(ML_ERROR, "incompatible volume signature: %8s\n",
579 hdr->signature);
580 status = -EINVAL;
581 }
582 brelse(*bh);
583 *bh = NULL;
584 if (status < 0) {
585 mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
586 "upgraded before mounting with ocfs v2\n");
587 goto bail;
588 }
589
590 /*
591 * Now check at magic offset for 512, 1024, 2048, 4096
592 * blocksizes. 4096 is the maximum blocksize because it is
593 * the minimum clustersize.
594 */
595 status = -EINVAL;
596 for (blksize = *sector_size;
597 blksize <= OCFS2_MAX_BLOCKSIZE;
598 blksize <<= 1) {
599 tmpstat = ocfs2_get_sector(sb, bh,
600 OCFS2_SUPER_BLOCK_BLKNO,
601 blksize);
602 if (tmpstat < 0) {
603 status = tmpstat;
604 mlog_errno(status);
605 goto bail;
606 }
607 di = (struct ocfs2_dinode *) (*bh)->b_data;
608 status = ocfs2_verify_volume(di, *bh, blksize);
609 if (status >= 0)
610 goto bail;
611 brelse(*bh);
612 *bh = NULL;
613 if (status != -EAGAIN)
614 break;
615 }
616
617 bail:
618 return status;
619 }
620
621 static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
622 {
623 if (ocfs2_mount_local(osb)) {
624 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
625 mlog(ML_ERROR, "Cannot heartbeat on a locally "
626 "mounted device.\n");
627 return -EINVAL;
628 }
629 }
630
631 if (ocfs2_userspace_stack(osb)) {
632 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
633 mlog(ML_ERROR, "Userspace stack expected, but "
634 "o2cb heartbeat arguments passed to mount\n");
635 return -EINVAL;
636 }
637 }
638
639 if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
640 if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
641 !ocfs2_userspace_stack(osb)) {
642 mlog(ML_ERROR, "Heartbeat has to be started to mount "
643 "a read-write clustered device.\n");
644 return -EINVAL;
645 }
646 }
647
648 return 0;
649 }
650
651 /*
652 * If we're using a userspace stack, mount should have passed
653 * a name that matches the disk. If not, mount should not
654 * have passed a stack.
655 */
656 static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
657 struct mount_options *mopt)
658 {
659 if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
660 mlog(ML_ERROR,
661 "cluster stack passed to mount, but this filesystem "
662 "does not support it\n");
663 return -EINVAL;
664 }
665
666 if (ocfs2_userspace_stack(osb) &&
667 strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
668 OCFS2_STACK_LABEL_LEN)) {
669 mlog(ML_ERROR,
670 "cluster stack passed to mount (\"%s\") does not "
671 "match the filesystem (\"%s\")\n",
672 mopt->cluster_stack,
673 osb->osb_cluster_stack);
674 return -EINVAL;
675 }
676
677 return 0;
678 }
679
680 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
681 {
682 int type;
683 struct super_block *sb = osb->sb;
684 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
685 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
686 int status = 0;
687
688 for (type = 0; type < MAXQUOTAS; type++) {
689 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
690 continue;
691 if (unsuspend)
692 status = vfs_quota_enable(
693 sb_dqopt(sb)->files[type],
694 type, QFMT_OCFS2,
695 DQUOT_SUSPENDED);
696 else
697 status = vfs_quota_disable(sb, type,
698 DQUOT_SUSPENDED);
699 if (status < 0)
700 break;
701 }
702 if (status < 0)
703 mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
704 "remount (error = %d).\n", status);
705 return status;
706 }
707
708 static int ocfs2_enable_quotas(struct ocfs2_super *osb)
709 {
710 struct inode *inode[MAXQUOTAS] = { NULL, NULL };
711 struct super_block *sb = osb->sb;
712 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
713 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
714 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
715 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
716 int status;
717 int type;
718
719 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
720 for (type = 0; type < MAXQUOTAS; type++) {
721 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
722 continue;
723 inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
724 osb->slot_num);
725 if (!inode[type]) {
726 status = -ENOENT;
727 goto out_quota_off;
728 }
729 status = vfs_quota_enable(inode[type], type, QFMT_OCFS2,
730 DQUOT_USAGE_ENABLED);
731 if (status < 0)
732 goto out_quota_off;
733 }
734
735 for (type = 0; type < MAXQUOTAS; type++)
736 iput(inode[type]);
737 return 0;
738 out_quota_off:
739 ocfs2_disable_quotas(osb);
740 for (type = 0; type < MAXQUOTAS; type++)
741 iput(inode[type]);
742 mlog_errno(status);
743 return status;
744 }
745
746 static void ocfs2_disable_quotas(struct ocfs2_super *osb)
747 {
748 int type;
749 struct inode *inode;
750 struct super_block *sb = osb->sb;
751
752 /* We mostly ignore errors in this function because there's not much
753 * we can do when we see them */
754 for (type = 0; type < MAXQUOTAS; type++) {
755 if (!sb_has_quota_loaded(sb, type))
756 continue;
757 inode = igrab(sb->s_dquot.files[type]);
758 /* Turn off quotas. This will remove all dquot structures from
759 * memory and so they will be automatically synced to global
760 * quota files */
761 vfs_quota_disable(sb, type, DQUOT_USAGE_ENABLED |
762 DQUOT_LIMITS_ENABLED);
763 if (!inode)
764 continue;
765 iput(inode);
766 }
767 }
768
769 /* Handle quota on quotactl */
770 static int ocfs2_quota_on(struct super_block *sb, int type, int format_id,
771 char *path, int remount)
772 {
773 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
774 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
775
776 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
777 return -EINVAL;
778
779 if (remount)
780 return 0; /* Just ignore it has been handled in
781 * ocfs2_remount() */
782 return vfs_quota_enable(sb_dqopt(sb)->files[type], type,
783 format_id, DQUOT_LIMITS_ENABLED);
784 }
785
786 /* Handle quota off quotactl */
787 static int ocfs2_quota_off(struct super_block *sb, int type, int remount)
788 {
789 if (remount)
790 return 0; /* Ignore now and handle later in
791 * ocfs2_remount() */
792 return vfs_quota_disable(sb, type, DQUOT_LIMITS_ENABLED);
793 }
794
795 static struct quotactl_ops ocfs2_quotactl_ops = {
796 .quota_on = ocfs2_quota_on,
797 .quota_off = ocfs2_quota_off,
798 .quota_sync = vfs_quota_sync,
799 .get_info = vfs_get_dqinfo,
800 .set_info = vfs_set_dqinfo,
801 .get_dqblk = vfs_get_dqblk,
802 .set_dqblk = vfs_set_dqblk,
803 };
804
805 static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
806 {
807 struct dentry *root;
808 int status, sector_size;
809 struct mount_options parsed_options;
810 struct inode *inode = NULL;
811 struct ocfs2_super *osb = NULL;
812 struct buffer_head *bh = NULL;
813 char nodestr[8];
814
815 mlog_entry("%p, %p, %i", sb, data, silent);
816
817 if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
818 status = -EINVAL;
819 goto read_super_error;
820 }
821
822 /* probe for superblock */
823 status = ocfs2_sb_probe(sb, &bh, &sector_size);
824 if (status < 0) {
825 mlog(ML_ERROR, "superblock probe failed!\n");
826 goto read_super_error;
827 }
828
829 status = ocfs2_initialize_super(sb, bh, sector_size);
830 osb = OCFS2_SB(sb);
831 if (status < 0) {
832 mlog_errno(status);
833 goto read_super_error;
834 }
835 brelse(bh);
836 bh = NULL;
837
838 if (!(osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR))
839 parsed_options.mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
840
841 osb->s_mount_opt = parsed_options.mount_opt;
842 osb->s_atime_quantum = parsed_options.atime_quantum;
843 osb->preferred_slot = parsed_options.slot;
844 osb->osb_commit_interval = parsed_options.commit_interval;
845 osb->local_alloc_default_bits = ocfs2_megabytes_to_clusters(sb, parsed_options.localalloc_opt);
846 osb->local_alloc_bits = osb->local_alloc_default_bits;
847 if (osb->s_mount_opt & OCFS2_MOUNT_USRQUOTA &&
848 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
849 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
850 status = -EINVAL;
851 mlog(ML_ERROR, "User quotas were requested, but this "
852 "filesystem does not have the feature enabled.\n");
853 goto read_super_error;
854 }
855 if (osb->s_mount_opt & OCFS2_MOUNT_GRPQUOTA &&
856 !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
857 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
858 status = -EINVAL;
859 mlog(ML_ERROR, "Group quotas were requested, but this "
860 "filesystem does not have the feature enabled.\n");
861 goto read_super_error;
862 }
863
864 status = ocfs2_verify_userspace_stack(osb, &parsed_options);
865 if (status)
866 goto read_super_error;
867
868 sb->s_magic = OCFS2_SUPER_MAGIC;
869
870 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
871 ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
872
873 /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
874 * heartbeat=none */
875 if (bdev_read_only(sb->s_bdev)) {
876 if (!(sb->s_flags & MS_RDONLY)) {
877 status = -EACCES;
878 mlog(ML_ERROR, "Readonly device detected but readonly "
879 "mount was not specified.\n");
880 goto read_super_error;
881 }
882
883 /* You should not be able to start a local heartbeat
884 * on a readonly device. */
885 if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
886 status = -EROFS;
887 mlog(ML_ERROR, "Local heartbeat specified on readonly "
888 "device.\n");
889 goto read_super_error;
890 }
891
892 status = ocfs2_check_journals_nolocks(osb);
893 if (status < 0) {
894 if (status == -EROFS)
895 mlog(ML_ERROR, "Recovery required on readonly "
896 "file system, but write access is "
897 "unavailable.\n");
898 else
899 mlog_errno(status);
900 goto read_super_error;
901 }
902
903 ocfs2_set_ro_flag(osb, 1);
904
905 printk(KERN_NOTICE "Readonly device detected. No cluster "
906 "services will be utilized for this mount. Recovery "
907 "will be skipped.\n");
908 }
909
910 if (!ocfs2_is_hard_readonly(osb)) {
911 if (sb->s_flags & MS_RDONLY)
912 ocfs2_set_ro_flag(osb, 0);
913 }
914
915 status = ocfs2_verify_heartbeat(osb);
916 if (status < 0) {
917 mlog_errno(status);
918 goto read_super_error;
919 }
920
921 osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
922 ocfs2_debugfs_root);
923 if (!osb->osb_debug_root) {
924 status = -EINVAL;
925 mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
926 goto read_super_error;
927 }
928
929 status = ocfs2_mount_volume(sb);
930 if (osb->root_inode)
931 inode = igrab(osb->root_inode);
932
933 if (status < 0)
934 goto read_super_error;
935
936 if (!inode) {
937 status = -EIO;
938 mlog_errno(status);
939 goto read_super_error;
940 }
941
942 root = d_alloc_root(inode);
943 if (!root) {
944 status = -ENOMEM;
945 mlog_errno(status);
946 goto read_super_error;
947 }
948
949 sb->s_root = root;
950
951 ocfs2_complete_mount_recovery(osb);
952
953 if (ocfs2_mount_local(osb))
954 snprintf(nodestr, sizeof(nodestr), "local");
955 else
956 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
957
958 printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
959 "with %s data mode.\n",
960 osb->dev_str, nodestr, osb->slot_num,
961 osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
962 "ordered");
963
964 atomic_set(&osb->vol_state, VOLUME_MOUNTED);
965 wake_up(&osb->osb_mount_event);
966
967 /* Now we can initialize quotas because we can afford to wait
968 * for cluster locks recovery now. That also means that truncation
969 * log recovery can happen but that waits for proper quota setup */
970 if (!(sb->s_flags & MS_RDONLY)) {
971 status = ocfs2_enable_quotas(osb);
972 if (status < 0) {
973 /* We have to err-out specially here because
974 * s_root is already set */
975 mlog_errno(status);
976 atomic_set(&osb->vol_state, VOLUME_DISABLED);
977 wake_up(&osb->osb_mount_event);
978 mlog_exit(status);
979 return status;
980 }
981 }
982
983 ocfs2_complete_quota_recovery(osb);
984
985 /* Now we wake up again for processes waiting for quotas */
986 atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
987 wake_up(&osb->osb_mount_event);
988
989 mlog_exit(status);
990 return status;
991
992 read_super_error:
993 brelse(bh);
994
995 if (inode)
996 iput(inode);
997
998 if (osb) {
999 atomic_set(&osb->vol_state, VOLUME_DISABLED);
1000 wake_up(&osb->osb_mount_event);
1001 ocfs2_dismount_volume(sb, 1);
1002 }
1003
1004 mlog_exit(status);
1005 return status;
1006 }
1007
1008 static int ocfs2_get_sb(struct file_system_type *fs_type,
1009 int flags,
1010 const char *dev_name,
1011 void *data,
1012 struct vfsmount *mnt)
1013 {
1014 return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super,
1015 mnt);
1016 }
1017
1018 static struct file_system_type ocfs2_fs_type = {
1019 .owner = THIS_MODULE,
1020 .name = "ocfs2",
1021 .get_sb = ocfs2_get_sb, /* is this called when we mount
1022 * the fs? */
1023 .kill_sb = kill_block_super, /* set to the generic one
1024 * right now, but do we
1025 * need to change that? */
1026 .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
1027 .next = NULL
1028 };
1029
1030 static int ocfs2_parse_options(struct super_block *sb,
1031 char *options,
1032 struct mount_options *mopt,
1033 int is_remount)
1034 {
1035 int status;
1036 char *p;
1037
1038 mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
1039 options ? options : "(none)");
1040
1041 mopt->commit_interval = 0;
1042 mopt->mount_opt = 0;
1043 mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1044 mopt->slot = OCFS2_INVALID_SLOT;
1045 mopt->localalloc_opt = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
1046 mopt->cluster_stack[0] = '\0';
1047
1048 if (!options) {
1049 status = 1;
1050 goto bail;
1051 }
1052
1053 while ((p = strsep(&options, ",")) != NULL) {
1054 int token, option;
1055 substring_t args[MAX_OPT_ARGS];
1056
1057 if (!*p)
1058 continue;
1059
1060 token = match_token(p, tokens, args);
1061 switch (token) {
1062 case Opt_hb_local:
1063 mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
1064 break;
1065 case Opt_hb_none:
1066 mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
1067 break;
1068 case Opt_barrier:
1069 if (match_int(&args[0], &option)) {
1070 status = 0;
1071 goto bail;
1072 }
1073 if (option)
1074 mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
1075 else
1076 mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
1077 break;
1078 case Opt_intr:
1079 mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
1080 break;
1081 case Opt_nointr:
1082 mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
1083 break;
1084 case Opt_err_panic:
1085 mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
1086 break;
1087 case Opt_err_ro:
1088 mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
1089 break;
1090 case Opt_data_ordered:
1091 mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
1092 break;
1093 case Opt_data_writeback:
1094 mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
1095 break;
1096 case Opt_user_xattr:
1097 mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
1098 break;
1099 case Opt_nouser_xattr:
1100 mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
1101 break;
1102 case Opt_atime_quantum:
1103 if (match_int(&args[0], &option)) {
1104 status = 0;
1105 goto bail;
1106 }
1107 if (option >= 0)
1108 mopt->atime_quantum = option;
1109 break;
1110 case Opt_slot:
1111 option = 0;
1112 if (match_int(&args[0], &option)) {
1113 status = 0;
1114 goto bail;
1115 }
1116 if (option)
1117 mopt->slot = (s16)option;
1118 break;
1119 case Opt_commit:
1120 option = 0;
1121 if (match_int(&args[0], &option)) {
1122 status = 0;
1123 goto bail;
1124 }
1125 if (option < 0)
1126 return 0;
1127 if (option == 0)
1128 option = JBD2_DEFAULT_MAX_COMMIT_AGE;
1129 mopt->commit_interval = HZ * option;
1130 break;
1131 case Opt_localalloc:
1132 option = 0;
1133 if (match_int(&args[0], &option)) {
1134 status = 0;
1135 goto bail;
1136 }
1137 if (option >= 0 && (option <= ocfs2_local_alloc_size(sb) * 8))
1138 mopt->localalloc_opt = option;
1139 break;
1140 case Opt_localflocks:
1141 /*
1142 * Changing this during remount could race
1143 * flock() requests, or "unbalance" existing
1144 * ones (e.g., a lock is taken in one mode but
1145 * dropped in the other). If users care enough
1146 * to flip locking modes during remount, we
1147 * could add a "local" flag to individual
1148 * flock structures for proper tracking of
1149 * state.
1150 */
1151 if (!is_remount)
1152 mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
1153 break;
1154 case Opt_stack:
1155 /* Check both that the option we were passed
1156 * is of the right length and that it is a proper
1157 * string of the right length.
1158 */
1159 if (((args[0].to - args[0].from) !=
1160 OCFS2_STACK_LABEL_LEN) ||
1161 (strnlen(args[0].from,
1162 OCFS2_STACK_LABEL_LEN) !=
1163 OCFS2_STACK_LABEL_LEN)) {
1164 mlog(ML_ERROR,
1165 "Invalid cluster_stack option\n");
1166 status = 0;
1167 goto bail;
1168 }
1169 memcpy(mopt->cluster_stack, args[0].from,
1170 OCFS2_STACK_LABEL_LEN);
1171 mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1172 break;
1173 case Opt_inode64:
1174 mopt->mount_opt |= OCFS2_MOUNT_INODE64;
1175 break;
1176 case Opt_usrquota:
1177 /* We check only on remount, otherwise features
1178 * aren't yet initialized. */
1179 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1180 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1181 mlog(ML_ERROR, "User quota requested but "
1182 "filesystem feature is not set\n");
1183 status = 0;
1184 goto bail;
1185 }
1186 mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
1187 break;
1188 case Opt_grpquota:
1189 if (is_remount && !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1190 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1191 mlog(ML_ERROR, "Group quota requested but "
1192 "filesystem feature is not set\n");
1193 status = 0;
1194 goto bail;
1195 }
1196 mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
1197 break;
1198 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1199 case Opt_acl:
1200 mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
1201 break;
1202 case Opt_noacl:
1203 mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
1204 break;
1205 #else
1206 case Opt_acl:
1207 case Opt_noacl:
1208 printk(KERN_INFO "ocfs2 (no)acl options not supported\n");
1209 break;
1210 #endif
1211 default:
1212 mlog(ML_ERROR,
1213 "Unrecognized mount option \"%s\" "
1214 "or missing value\n", p);
1215 status = 0;
1216 goto bail;
1217 }
1218 }
1219
1220 status = 1;
1221
1222 bail:
1223 mlog_exit(status);
1224 return status;
1225 }
1226
1227 static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
1228 {
1229 struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
1230 unsigned long opts = osb->s_mount_opt;
1231 unsigned int local_alloc_megs;
1232
1233 if (opts & OCFS2_MOUNT_HB_LOCAL)
1234 seq_printf(s, ",_netdev,heartbeat=local");
1235 else
1236 seq_printf(s, ",heartbeat=none");
1237
1238 if (opts & OCFS2_MOUNT_NOINTR)
1239 seq_printf(s, ",nointr");
1240
1241 if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
1242 seq_printf(s, ",data=writeback");
1243 else
1244 seq_printf(s, ",data=ordered");
1245
1246 if (opts & OCFS2_MOUNT_BARRIER)
1247 seq_printf(s, ",barrier=1");
1248
1249 if (opts & OCFS2_MOUNT_ERRORS_PANIC)
1250 seq_printf(s, ",errors=panic");
1251 else
1252 seq_printf(s, ",errors=remount-ro");
1253
1254 if (osb->preferred_slot != OCFS2_INVALID_SLOT)
1255 seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
1256
1257 if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
1258 seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
1259
1260 if (osb->osb_commit_interval)
1261 seq_printf(s, ",commit=%u",
1262 (unsigned) (osb->osb_commit_interval / HZ));
1263
1264 local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
1265 if (local_alloc_megs != OCFS2_DEFAULT_LOCAL_ALLOC_SIZE)
1266 seq_printf(s, ",localalloc=%d", local_alloc_megs);
1267
1268 if (opts & OCFS2_MOUNT_LOCALFLOCKS)
1269 seq_printf(s, ",localflocks,");
1270
1271 if (osb->osb_cluster_stack[0])
1272 seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
1273 osb->osb_cluster_stack);
1274 if (opts & OCFS2_MOUNT_USRQUOTA)
1275 seq_printf(s, ",usrquota");
1276 if (opts & OCFS2_MOUNT_GRPQUOTA)
1277 seq_printf(s, ",grpquota");
1278
1279 if (opts & OCFS2_MOUNT_NOUSERXATTR)
1280 seq_printf(s, ",nouser_xattr");
1281 else
1282 seq_printf(s, ",user_xattr");
1283
1284 if (opts & OCFS2_MOUNT_INODE64)
1285 seq_printf(s, ",inode64");
1286
1287 #ifdef CONFIG_OCFS2_FS_POSIX_ACL
1288 if (opts & OCFS2_MOUNT_POSIX_ACL)
1289 seq_printf(s, ",acl");
1290 else
1291 seq_printf(s, ",noacl");
1292 #endif
1293
1294 return 0;
1295 }
1296
1297 static int __init ocfs2_init(void)
1298 {
1299 int status;
1300
1301 mlog_entry_void();
1302
1303 ocfs2_print_version();
1304
1305 status = init_ocfs2_uptodate_cache();
1306 if (status < 0) {
1307 mlog_errno(status);
1308 goto leave;
1309 }
1310
1311 status = ocfs2_initialize_mem_caches();
1312 if (status < 0) {
1313 mlog_errno(status);
1314 goto leave;
1315 }
1316
1317 ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
1318 if (!ocfs2_wq) {
1319 status = -ENOMEM;
1320 goto leave;
1321 }
1322
1323 ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
1324 if (!ocfs2_debugfs_root) {
1325 status = -EFAULT;
1326 mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
1327 }
1328
1329 status = ocfs2_quota_setup();
1330 if (status)
1331 goto leave;
1332
1333 ocfs2_set_locking_protocol();
1334
1335 status = register_quota_format(&ocfs2_quota_format);
1336 leave:
1337 if (status < 0) {
1338 ocfs2_quota_shutdown();
1339 ocfs2_free_mem_caches();
1340 exit_ocfs2_uptodate_cache();
1341 }
1342
1343 mlog_exit(status);
1344
1345 if (status >= 0) {
1346 return register_filesystem(&ocfs2_fs_type);
1347 } else
1348 return -1;
1349 }
1350
1351 static void __exit ocfs2_exit(void)
1352 {
1353 mlog_entry_void();
1354
1355 ocfs2_quota_shutdown();
1356
1357 if (ocfs2_wq) {
1358 flush_workqueue(ocfs2_wq);
1359 destroy_workqueue(ocfs2_wq);
1360 }
1361
1362 unregister_quota_format(&ocfs2_quota_format);
1363
1364 debugfs_remove(ocfs2_debugfs_root);
1365
1366 ocfs2_free_mem_caches();
1367
1368 unregister_filesystem(&ocfs2_fs_type);
1369
1370 exit_ocfs2_uptodate_cache();
1371
1372 mlog_exit_void();
1373 }
1374
1375 static void ocfs2_put_super(struct super_block *sb)
1376 {
1377 mlog_entry("(0x%p)\n", sb);
1378
1379 ocfs2_sync_blockdev(sb);
1380 ocfs2_dismount_volume(sb, 0);
1381
1382 mlog_exit_void();
1383 }
1384
1385 static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1386 {
1387 struct ocfs2_super *osb;
1388 u32 numbits, freebits;
1389 int status;
1390 struct ocfs2_dinode *bm_lock;
1391 struct buffer_head *bh = NULL;
1392 struct inode *inode = NULL;
1393
1394 mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
1395
1396 osb = OCFS2_SB(dentry->d_sb);
1397
1398 inode = ocfs2_get_system_file_inode(osb,
1399 GLOBAL_BITMAP_SYSTEM_INODE,
1400 OCFS2_INVALID_SLOT);
1401 if (!inode) {
1402 mlog(ML_ERROR, "failed to get bitmap inode\n");
1403 status = -EIO;
1404 goto bail;
1405 }
1406
1407 status = ocfs2_inode_lock(inode, &bh, 0);
1408 if (status < 0) {
1409 mlog_errno(status);
1410 goto bail;
1411 }
1412
1413 bm_lock = (struct ocfs2_dinode *) bh->b_data;
1414
1415 numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
1416 freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
1417
1418 buf->f_type = OCFS2_SUPER_MAGIC;
1419 buf->f_bsize = dentry->d_sb->s_blocksize;
1420 buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
1421 buf->f_blocks = ((sector_t) numbits) *
1422 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1423 buf->f_bfree = ((sector_t) freebits) *
1424 (osb->s_clustersize >> osb->sb->s_blocksize_bits);
1425 buf->f_bavail = buf->f_bfree;
1426 buf->f_files = numbits;
1427 buf->f_ffree = freebits;
1428
1429 brelse(bh);
1430
1431 ocfs2_inode_unlock(inode, 0);
1432 status = 0;
1433 bail:
1434 if (inode)
1435 iput(inode);
1436
1437 mlog_exit(status);
1438
1439 return status;
1440 }
1441
1442 static void ocfs2_inode_init_once(void *data)
1443 {
1444 struct ocfs2_inode_info *oi = data;
1445
1446 oi->ip_flags = 0;
1447 oi->ip_open_count = 0;
1448 spin_lock_init(&oi->ip_lock);
1449 ocfs2_extent_map_init(&oi->vfs_inode);
1450 INIT_LIST_HEAD(&oi->ip_io_markers);
1451 oi->ip_created_trans = 0;
1452 oi->ip_last_trans = 0;
1453 oi->ip_dir_start_lookup = 0;
1454
1455 init_rwsem(&oi->ip_alloc_sem);
1456 init_rwsem(&oi->ip_xattr_sem);
1457 mutex_init(&oi->ip_io_mutex);
1458
1459 oi->ip_blkno = 0ULL;
1460 oi->ip_clusters = 0;
1461
1462 ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
1463 ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
1464 ocfs2_lock_res_init_once(&oi->ip_open_lockres);
1465
1466 ocfs2_metadata_cache_init(&oi->vfs_inode);
1467
1468 inode_init_once(&oi->vfs_inode);
1469 }
1470
1471 static int ocfs2_initialize_mem_caches(void)
1472 {
1473 ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
1474 sizeof(struct ocfs2_inode_info),
1475 0,
1476 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1477 SLAB_MEM_SPREAD),
1478 ocfs2_inode_init_once);
1479 ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
1480 sizeof(struct ocfs2_dquot),
1481 0,
1482 (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
1483 SLAB_MEM_SPREAD),
1484 NULL);
1485 ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
1486 sizeof(struct ocfs2_quota_chunk),
1487 0,
1488 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
1489 NULL);
1490 if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
1491 !ocfs2_qf_chunk_cachep) {
1492 if (ocfs2_inode_cachep)
1493 kmem_cache_destroy(ocfs2_inode_cachep);
1494 if (ocfs2_dquot_cachep)
1495 kmem_cache_destroy(ocfs2_dquot_cachep);
1496 if (ocfs2_qf_chunk_cachep)
1497 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1498 return -ENOMEM;
1499 }
1500
1501 return 0;
1502 }
1503
1504 static void ocfs2_free_mem_caches(void)
1505 {
1506 if (ocfs2_inode_cachep)
1507 kmem_cache_destroy(ocfs2_inode_cachep);
1508 ocfs2_inode_cachep = NULL;
1509
1510 if (ocfs2_dquot_cachep)
1511 kmem_cache_destroy(ocfs2_dquot_cachep);
1512 ocfs2_dquot_cachep = NULL;
1513
1514 if (ocfs2_qf_chunk_cachep)
1515 kmem_cache_destroy(ocfs2_qf_chunk_cachep);
1516 ocfs2_qf_chunk_cachep = NULL;
1517 }
1518
1519 static int ocfs2_get_sector(struct super_block *sb,
1520 struct buffer_head **bh,
1521 int block,
1522 int sect_size)
1523 {
1524 if (!sb_set_blocksize(sb, sect_size)) {
1525 mlog(ML_ERROR, "unable to set blocksize\n");
1526 return -EIO;
1527 }
1528
1529 *bh = sb_getblk(sb, block);
1530 if (!*bh) {
1531 mlog_errno(-EIO);
1532 return -EIO;
1533 }
1534 lock_buffer(*bh);
1535 if (!buffer_dirty(*bh))
1536 clear_buffer_uptodate(*bh);
1537 unlock_buffer(*bh);
1538 ll_rw_block(READ, 1, bh);
1539 wait_on_buffer(*bh);
1540 return 0;
1541 }
1542
1543 static int ocfs2_mount_volume(struct super_block *sb)
1544 {
1545 int status = 0;
1546 int unlock_super = 0;
1547 struct ocfs2_super *osb = OCFS2_SB(sb);
1548
1549 mlog_entry_void();
1550
1551 if (ocfs2_is_hard_readonly(osb))
1552 goto leave;
1553
1554 status = ocfs2_dlm_init(osb);
1555 if (status < 0) {
1556 mlog_errno(status);
1557 goto leave;
1558 }
1559
1560 status = ocfs2_super_lock(osb, 1);
1561 if (status < 0) {
1562 mlog_errno(status);
1563 goto leave;
1564 }
1565 unlock_super = 1;
1566
1567 /* This will load up the node map and add ourselves to it. */
1568 status = ocfs2_find_slot(osb);
1569 if (status < 0) {
1570 mlog_errno(status);
1571 goto leave;
1572 }
1573
1574 /* load all node-local system inodes */
1575 status = ocfs2_init_local_system_inodes(osb);
1576 if (status < 0) {
1577 mlog_errno(status);
1578 goto leave;
1579 }
1580
1581 status = ocfs2_check_volume(osb);
1582 if (status < 0) {
1583 mlog_errno(status);
1584 goto leave;
1585 }
1586
1587 status = ocfs2_truncate_log_init(osb);
1588 if (status < 0) {
1589 mlog_errno(status);
1590 goto leave;
1591 }
1592
1593 if (ocfs2_mount_local(osb))
1594 goto leave;
1595
1596 leave:
1597 if (unlock_super)
1598 ocfs2_super_unlock(osb, 1);
1599
1600 mlog_exit(status);
1601 return status;
1602 }
1603
1604 static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
1605 {
1606 int tmp, hangup_needed = 0;
1607 struct ocfs2_super *osb = NULL;
1608 char nodestr[8];
1609
1610 mlog_entry("(0x%p)\n", sb);
1611
1612 BUG_ON(!sb);
1613 osb = OCFS2_SB(sb);
1614 BUG_ON(!osb);
1615
1616 ocfs2_disable_quotas(osb);
1617
1618 ocfs2_shutdown_local_alloc(osb);
1619
1620 ocfs2_truncate_log_shutdown(osb);
1621
1622 /* This will disable recovery and flush any recovery work. */
1623 ocfs2_recovery_exit(osb);
1624
1625 ocfs2_journal_shutdown(osb);
1626
1627 ocfs2_sync_blockdev(sb);
1628
1629 /* No cluster connection means we've failed during mount, so skip
1630 * all the steps which depended on that to complete. */
1631 if (osb->cconn) {
1632 tmp = ocfs2_super_lock(osb, 1);
1633 if (tmp < 0) {
1634 mlog_errno(tmp);
1635 return;
1636 }
1637 }
1638
1639 if (osb->slot_num != OCFS2_INVALID_SLOT)
1640 ocfs2_put_slot(osb);
1641
1642 if (osb->cconn)
1643 ocfs2_super_unlock(osb, 1);
1644
1645 ocfs2_release_system_inodes(osb);
1646
1647 /*
1648 * If we're dismounting due to mount error, mount.ocfs2 will clean
1649 * up heartbeat. If we're a local mount, there is no heartbeat.
1650 * If we failed before we got a uuid_str yet, we can't stop
1651 * heartbeat. Otherwise, do it.
1652 */
1653 if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str)
1654 hangup_needed = 1;
1655
1656 if (osb->cconn)
1657 ocfs2_dlm_shutdown(osb, hangup_needed);
1658
1659 debugfs_remove(osb->osb_debug_root);
1660
1661 if (hangup_needed)
1662 ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
1663
1664 atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
1665
1666 if (ocfs2_mount_local(osb))
1667 snprintf(nodestr, sizeof(nodestr), "local");
1668 else
1669 snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
1670
1671 printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
1672 osb->dev_str, nodestr);
1673
1674 ocfs2_delete_osb(osb);
1675 kfree(osb);
1676 sb->s_dev = 0;
1677 sb->s_fs_info = NULL;
1678 }
1679
1680 static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
1681 unsigned uuid_bytes)
1682 {
1683 int i, ret;
1684 char *ptr;
1685
1686 BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
1687
1688 osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
1689 if (osb->uuid_str == NULL)
1690 return -ENOMEM;
1691
1692 for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
1693 /* print with null */
1694 ret = snprintf(ptr, 3, "%02X", uuid[i]);
1695 if (ret != 2) /* drop super cleans up */
1696 return -EINVAL;
1697 /* then only advance past the last char */
1698 ptr += 2;
1699 }
1700
1701 return 0;
1702 }
1703
1704 static int ocfs2_initialize_super(struct super_block *sb,
1705 struct buffer_head *bh,
1706 int sector_size)
1707 {
1708 int status;
1709 int i, cbits, bbits;
1710 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1711 struct inode *inode = NULL;
1712 struct ocfs2_journal *journal;
1713 __le32 uuid_net_key;
1714 struct ocfs2_super *osb;
1715
1716 mlog_entry_void();
1717
1718 osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
1719 if (!osb) {
1720 status = -ENOMEM;
1721 mlog_errno(status);
1722 goto bail;
1723 }
1724
1725 sb->s_fs_info = osb;
1726 sb->s_op = &ocfs2_sops;
1727 sb->s_export_op = &ocfs2_export_ops;
1728 sb->s_qcop = &ocfs2_quotactl_ops;
1729 sb->dq_op = &ocfs2_quota_operations;
1730 sb->s_xattr = ocfs2_xattr_handlers;
1731 sb->s_time_gran = 1;
1732 sb->s_flags |= MS_NOATIME;
1733 /* this is needed to support O_LARGEFILE */
1734 cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1735 bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
1736 sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
1737
1738 osb->sb = sb;
1739 /* Save off for ocfs2_rw_direct */
1740 osb->s_sectsize_bits = blksize_bits(sector_size);
1741 BUG_ON(!osb->s_sectsize_bits);
1742
1743 spin_lock_init(&osb->dc_task_lock);
1744 init_waitqueue_head(&osb->dc_event);
1745 osb->dc_work_sequence = 0;
1746 osb->dc_wake_sequence = 0;
1747 INIT_LIST_HEAD(&osb->blocked_lock_list);
1748 osb->blocked_lock_count = 0;
1749 spin_lock_init(&osb->osb_lock);
1750 ocfs2_init_inode_steal_slot(osb);
1751
1752 atomic_set(&osb->alloc_stats.moves, 0);
1753 atomic_set(&osb->alloc_stats.local_data, 0);
1754 atomic_set(&osb->alloc_stats.bitmap_data, 0);
1755 atomic_set(&osb->alloc_stats.bg_allocs, 0);
1756 atomic_set(&osb->alloc_stats.bg_extends, 0);
1757
1758 ocfs2_init_node_maps(osb);
1759
1760 snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
1761 MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
1762
1763 status = ocfs2_recovery_init(osb);
1764 if (status) {
1765 mlog(ML_ERROR, "Unable to initialize recovery state\n");
1766 mlog_errno(status);
1767 goto bail;
1768 }
1769
1770 init_waitqueue_head(&osb->checkpoint_event);
1771 atomic_set(&osb->needs_checkpoint, 0);
1772
1773 osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
1774
1775 osb->slot_num = OCFS2_INVALID_SLOT;
1776
1777 osb->s_xattr_inline_size = le16_to_cpu(
1778 di->id2.i_super.s_xattr_inline_size);
1779
1780 osb->local_alloc_state = OCFS2_LA_UNUSED;
1781 osb->local_alloc_bh = NULL;
1782 INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
1783
1784 init_waitqueue_head(&osb->osb_mount_event);
1785
1786 osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
1787 if (!osb->vol_label) {
1788 mlog(ML_ERROR, "unable to alloc vol label\n");
1789 status = -ENOMEM;
1790 goto bail;
1791 }
1792
1793 osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
1794 if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
1795 mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
1796 osb->max_slots);
1797 status = -EINVAL;
1798 goto bail;
1799 }
1800 mlog(0, "max_slots for this device: %u\n", osb->max_slots);
1801
1802 osb->slot_recovery_generations =
1803 kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
1804 GFP_KERNEL);
1805 if (!osb->slot_recovery_generations) {
1806 status = -ENOMEM;
1807 mlog_errno(status);
1808 goto bail;
1809 }
1810
1811 init_waitqueue_head(&osb->osb_wipe_event);
1812 osb->osb_orphan_wipes = kcalloc(osb->max_slots,
1813 sizeof(*osb->osb_orphan_wipes),
1814 GFP_KERNEL);
1815 if (!osb->osb_orphan_wipes) {
1816 status = -ENOMEM;
1817 mlog_errno(status);
1818 goto bail;
1819 }
1820
1821 osb->s_feature_compat =
1822 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
1823 osb->s_feature_ro_compat =
1824 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
1825 osb->s_feature_incompat =
1826 le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
1827
1828 if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
1829 mlog(ML_ERROR, "couldn't mount because of unsupported "
1830 "optional features (%x).\n", i);
1831 status = -EINVAL;
1832 goto bail;
1833 }
1834 if (!(osb->sb->s_flags & MS_RDONLY) &&
1835 (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
1836 mlog(ML_ERROR, "couldn't mount RDWR because of "
1837 "unsupported optional features (%x).\n", i);
1838 status = -EINVAL;
1839 goto bail;
1840 }
1841
1842 if (ocfs2_userspace_stack(osb)) {
1843 memcpy(osb->osb_cluster_stack,
1844 OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
1845 OCFS2_STACK_LABEL_LEN);
1846 osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
1847 if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
1848 mlog(ML_ERROR,
1849 "couldn't mount because of an invalid "
1850 "cluster stack label (%s) \n",
1851 osb->osb_cluster_stack);
1852 status = -EINVAL;
1853 goto bail;
1854 }
1855 } else {
1856 /* The empty string is identical with classic tools that
1857 * don't know about s_cluster_info. */
1858 osb->osb_cluster_stack[0] = '\0';
1859 }
1860
1861 get_random_bytes(&osb->s_next_generation, sizeof(u32));
1862
1863 /* FIXME
1864 * This should be done in ocfs2_journal_init(), but unknown
1865 * ordering issues will cause the filesystem to crash.
1866 * If anyone wants to figure out what part of the code
1867 * refers to osb->journal before ocfs2_journal_init() is run,
1868 * be my guest.
1869 */
1870 /* initialize our journal structure */
1871
1872 journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
1873 if (!journal) {
1874 mlog(ML_ERROR, "unable to alloc journal\n");
1875 status = -ENOMEM;
1876 goto bail;
1877 }
1878 osb->journal = journal;
1879 journal->j_osb = osb;
1880
1881 atomic_set(&journal->j_num_trans, 0);
1882 init_rwsem(&journal->j_trans_barrier);
1883 init_waitqueue_head(&journal->j_checkpointed);
1884 spin_lock_init(&journal->j_lock);
1885 journal->j_trans_id = (unsigned long) 1;
1886 INIT_LIST_HEAD(&journal->j_la_cleanups);
1887 INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
1888 journal->j_state = OCFS2_JOURNAL_FREE;
1889
1890 /* get some pseudo constants for clustersize bits */
1891 osb->s_clustersize_bits =
1892 le32_to_cpu(di->id2.i_super.s_clustersize_bits);
1893 osb->s_clustersize = 1 << osb->s_clustersize_bits;
1894 mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits);
1895
1896 if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
1897 osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
1898 mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
1899 osb->s_clustersize);
1900 status = -EINVAL;
1901 goto bail;
1902 }
1903
1904 if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1)
1905 > (u32)~0UL) {
1906 mlog(ML_ERROR, "Volume might try to write to blocks beyond "
1907 "what jbd can address in 32 bits.\n");
1908 status = -EINVAL;
1909 goto bail;
1910 }
1911
1912 if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
1913 sizeof(di->id2.i_super.s_uuid))) {
1914 mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
1915 status = -ENOMEM;
1916 goto bail;
1917 }
1918
1919 memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
1920
1921 strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
1922 osb->vol_label[63] = '\0';
1923 osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
1924 osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
1925 osb->first_cluster_group_blkno =
1926 le64_to_cpu(di->id2.i_super.s_first_cluster_group);
1927 osb->fs_generation = le32_to_cpu(di->i_fs_generation);
1928 osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
1929 mlog(0, "vol_label: %s\n", osb->vol_label);
1930 mlog(0, "uuid: %s\n", osb->uuid_str);
1931 mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
1932 (unsigned long long)osb->root_blkno,
1933 (unsigned long long)osb->system_dir_blkno);
1934
1935 osb->osb_dlm_debug = ocfs2_new_dlm_debug();
1936 if (!osb->osb_dlm_debug) {
1937 status = -ENOMEM;
1938 mlog_errno(status);
1939 goto bail;
1940 }
1941
1942 atomic_set(&osb->vol_state, VOLUME_INIT);
1943
1944 /* load root, system_dir, and all global system inodes */
1945 status = ocfs2_init_global_system_inodes(osb);
1946 if (status < 0) {
1947 mlog_errno(status);
1948 goto bail;
1949 }
1950
1951 /*
1952 * global bitmap
1953 */
1954 inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
1955 OCFS2_INVALID_SLOT);
1956 if (!inode) {
1957 status = -EINVAL;
1958 mlog_errno(status);
1959 goto bail;
1960 }
1961
1962 osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
1963 iput(inode);
1964
1965 osb->bitmap_cpg = ocfs2_group_bitmap_size(sb) * 8;
1966
1967 status = ocfs2_init_slot_info(osb);
1968 if (status < 0) {
1969 mlog_errno(status);
1970 goto bail;
1971 }
1972
1973 bail:
1974 mlog_exit(status);
1975 return status;
1976 }
1977
1978 /*
1979 * will return: -EAGAIN if it is ok to keep searching for superblocks
1980 * -EINVAL if there is a bad superblock
1981 * 0 on success
1982 */
1983 static int ocfs2_verify_volume(struct ocfs2_dinode *di,
1984 struct buffer_head *bh,
1985 u32 blksz)
1986 {
1987 int status = -EAGAIN;
1988
1989 mlog_entry_void();
1990
1991 if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
1992 strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
1993 /* We have to do a raw check of the feature here */
1994 if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
1995 OCFS2_FEATURE_INCOMPAT_META_ECC) {
1996 status = ocfs2_block_check_validate(bh->b_data,
1997 bh->b_size,
1998 &di->i_check);
1999 if (status)
2000 goto out;
2001 }
2002 status = -EINVAL;
2003 if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
2004 mlog(ML_ERROR, "found superblock with incorrect block "
2005 "size: found %u, should be %u\n",
2006 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
2007 blksz);
2008 } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
2009 OCFS2_MAJOR_REV_LEVEL ||
2010 le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
2011 OCFS2_MINOR_REV_LEVEL) {
2012 mlog(ML_ERROR, "found superblock with bad version: "
2013 "found %u.%u, should be %u.%u\n",
2014 le16_to_cpu(di->id2.i_super.s_major_rev_level),
2015 le16_to_cpu(di->id2.i_super.s_minor_rev_level),
2016 OCFS2_MAJOR_REV_LEVEL,
2017 OCFS2_MINOR_REV_LEVEL);
2018 } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
2019 mlog(ML_ERROR, "bad block number on superblock: "
2020 "found %llu, should be %llu\n",
2021 (unsigned long long)le64_to_cpu(di->i_blkno),
2022 (unsigned long long)bh->b_blocknr);
2023 } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
2024 le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
2025 mlog(ML_ERROR, "bad cluster size found: %u\n",
2026 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
2027 } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
2028 mlog(ML_ERROR, "bad root_blkno: 0\n");
2029 } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
2030 mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
2031 } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
2032 mlog(ML_ERROR,
2033 "Superblock slots found greater than file system "
2034 "maximum: found %u, max %u\n",
2035 le16_to_cpu(di->id2.i_super.s_max_slots),
2036 OCFS2_MAX_SLOTS);
2037 } else {
2038 /* found it! */
2039 status = 0;
2040 }
2041 }
2042
2043 out:
2044 mlog_exit(status);
2045 return status;
2046 }
2047
2048 static int ocfs2_check_volume(struct ocfs2_super *osb)
2049 {
2050 int status;
2051 int dirty;
2052 int local;
2053 struct ocfs2_dinode *local_alloc = NULL; /* only used if we
2054 * recover
2055 * ourselves. */
2056
2057 mlog_entry_void();
2058
2059 /* Init our journal object. */
2060 status = ocfs2_journal_init(osb->journal, &dirty);
2061 if (status < 0) {
2062 mlog(ML_ERROR, "Could not initialize journal!\n");
2063 goto finally;
2064 }
2065
2066 /* If the journal was unmounted cleanly then we don't want to
2067 * recover anything. Otherwise, journal_load will do that
2068 * dirty work for us :) */
2069 if (!dirty) {
2070 status = ocfs2_journal_wipe(osb->journal, 0);
2071 if (status < 0) {
2072 mlog_errno(status);
2073 goto finally;
2074 }
2075 } else {
2076 mlog(ML_NOTICE, "File system was not unmounted cleanly, "
2077 "recovering volume.\n");
2078 }
2079
2080 local = ocfs2_mount_local(osb);
2081
2082 /* will play back anything left in the journal. */
2083 status = ocfs2_journal_load(osb->journal, local, dirty);
2084 if (status < 0) {
2085 mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
2086 goto finally;
2087 }
2088
2089 if (dirty) {
2090 /* recover my local alloc if we didn't unmount cleanly. */
2091 status = ocfs2_begin_local_alloc_recovery(osb,
2092 osb->slot_num,
2093 &local_alloc);
2094 if (status < 0) {
2095 mlog_errno(status);
2096 goto finally;
2097 }
2098 /* we complete the recovery process after we've marked
2099 * ourselves as mounted. */
2100 }
2101
2102 mlog(0, "Journal loaded.\n");
2103
2104 status = ocfs2_load_local_alloc(osb);
2105 if (status < 0) {
2106 mlog_errno(status);
2107 goto finally;
2108 }
2109
2110 if (dirty) {
2111 /* Recovery will be completed after we've mounted the
2112 * rest of the volume. */
2113 osb->dirty = 1;
2114 osb->local_alloc_copy = local_alloc;
2115 local_alloc = NULL;
2116 }
2117
2118 /* go through each journal, trylock it and if you get the
2119 * lock, and it's marked as dirty, set the bit in the recover
2120 * map and launch a recovery thread for it. */
2121 status = ocfs2_mark_dead_nodes(osb);
2122 if (status < 0)
2123 mlog_errno(status);
2124
2125 finally:
2126 if (local_alloc)
2127 kfree(local_alloc);
2128
2129 mlog_exit(status);
2130 return status;
2131 }
2132
2133 /*
2134 * The routine gets called from dismount or close whenever a dismount on
2135 * volume is requested and the osb open count becomes 1.
2136 * It will remove the osb from the global list and also free up all the
2137 * initialized resources and fileobject.
2138 */
2139 static void ocfs2_delete_osb(struct ocfs2_super *osb)
2140 {
2141 mlog_entry_void();
2142
2143 /* This function assumes that the caller has the main osb resource */
2144
2145 ocfs2_free_slot_info(osb);
2146
2147 kfree(osb->osb_orphan_wipes);
2148 kfree(osb->slot_recovery_generations);
2149 /* FIXME
2150 * This belongs in journal shutdown, but because we have to
2151 * allocate osb->journal at the start of ocfs2_initalize_osb(),
2152 * we free it here.
2153 */
2154 kfree(osb->journal);
2155 if (osb->local_alloc_copy)
2156 kfree(osb->local_alloc_copy);
2157 kfree(osb->uuid_str);
2158 ocfs2_put_dlm_debug(osb->osb_dlm_debug);
2159 memset(osb, 0, sizeof(struct ocfs2_super));
2160
2161 mlog_exit_void();
2162 }
2163
2164 /* Put OCFS2 into a readonly state, or (if the user specifies it),
2165 * panic(). We do not support continue-on-error operation. */
2166 static void ocfs2_handle_error(struct super_block *sb)
2167 {
2168 struct ocfs2_super *osb = OCFS2_SB(sb);
2169
2170 if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
2171 panic("OCFS2: (device %s): panic forced after error\n",
2172 sb->s_id);
2173
2174 ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
2175
2176 if (sb->s_flags & MS_RDONLY &&
2177 (ocfs2_is_soft_readonly(osb) ||
2178 ocfs2_is_hard_readonly(osb)))
2179 return;
2180
2181 printk(KERN_CRIT "File system is now read-only due to the potential "
2182 "of on-disk corruption. Please run fsck.ocfs2 once the file "
2183 "system is unmounted.\n");
2184 sb->s_flags |= MS_RDONLY;
2185 ocfs2_set_ro_flag(osb, 0);
2186 }
2187
2188 static char error_buf[1024];
2189
2190 void __ocfs2_error(struct super_block *sb,
2191 const char *function,
2192 const char *fmt, ...)
2193 {
2194 va_list args;
2195
2196 va_start(args, fmt);
2197 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2198 va_end(args);
2199
2200 /* Not using mlog here because we want to show the actual
2201 * function the error came from. */
2202 printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
2203 sb->s_id, function, error_buf);
2204
2205 ocfs2_handle_error(sb);
2206 }
2207
2208 /* Handle critical errors. This is intentionally more drastic than
2209 * ocfs2_handle_error, so we only use for things like journal errors,
2210 * etc. */
2211 void __ocfs2_abort(struct super_block* sb,
2212 const char *function,
2213 const char *fmt, ...)
2214 {
2215 va_list args;
2216
2217 va_start(args, fmt);
2218 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2219 va_end(args);
2220
2221 printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
2222 sb->s_id, function, error_buf);
2223
2224 /* We don't have the cluster support yet to go straight to
2225 * hard readonly in here. Until then, we want to keep
2226 * ocfs2_abort() so that we can at least mark critical
2227 * errors.
2228 *
2229 * TODO: This should abort the journal and alert other nodes
2230 * that our slot needs recovery. */
2231
2232 /* Force a panic(). This stinks, but it's better than letting
2233 * things continue without having a proper hard readonly
2234 * here. */
2235 OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
2236 ocfs2_handle_error(sb);
2237 }
2238
2239 module_init(ocfs2_init);
2240 module_exit(ocfs2_exit);
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