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