xref: /openbmc/linux/fs/ocfs2/resize.c (revision 9ac8d3fb)
1 /* -*- mode: c; c-basic-offset: 8; -*-
2  * vim: noexpandtab sw=8 ts=8 sts=0:
3  *
4  * resize.c
5  *
6  * volume resize.
7  * Inspired by ext3/resize.c.
8  *
9  * Copyright (C) 2007 Oracle.  All rights reserved.
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Public
13  * License as published by the Free Software Foundation; either
14  * version 2 of the License, or (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19  * General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public
22  * License along with this program; if not, write to the
23  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24  * Boston, MA 021110-1307, USA.
25  */
26 
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 
30 #define MLOG_MASK_PREFIX ML_DISK_ALLOC
31 #include <cluster/masklog.h>
32 
33 #include "ocfs2.h"
34 
35 #include "alloc.h"
36 #include "dlmglue.h"
37 #include "inode.h"
38 #include "journal.h"
39 #include "super.h"
40 #include "sysfile.h"
41 #include "uptodate.h"
42 
43 #include "buffer_head_io.h"
44 #include "suballoc.h"
45 #include "resize.h"
46 
47 /*
48  * Check whether there are new backup superblocks exist
49  * in the last group. If there are some, mark them or clear
50  * them in the bitmap.
51  *
52  * Return how many backups we find in the last group.
53  */
54 static u16 ocfs2_calc_new_backup_super(struct inode *inode,
55 				       struct ocfs2_group_desc *gd,
56 				       int new_clusters,
57 				       u32 first_new_cluster,
58 				       u16 cl_cpg,
59 				       int set)
60 {
61 	int i;
62 	u16 backups = 0;
63 	u32 cluster;
64 	u64 blkno, gd_blkno, lgd_blkno = le64_to_cpu(gd->bg_blkno);
65 
66 	for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
67 		blkno = ocfs2_backup_super_blkno(inode->i_sb, i);
68 		cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
69 
70 		gd_blkno = ocfs2_which_cluster_group(inode, cluster);
71 		if (gd_blkno < lgd_blkno)
72 			continue;
73 		else if (gd_blkno > lgd_blkno)
74 			break;
75 
76 		if (set)
77 			ocfs2_set_bit(cluster % cl_cpg,
78 				      (unsigned long *)gd->bg_bitmap);
79 		else
80 			ocfs2_clear_bit(cluster % cl_cpg,
81 					(unsigned long *)gd->bg_bitmap);
82 		backups++;
83 	}
84 
85 	mlog_exit_void();
86 	return backups;
87 }
88 
89 static int ocfs2_update_last_group_and_inode(handle_t *handle,
90 					     struct inode *bm_inode,
91 					     struct buffer_head *bm_bh,
92 					     struct buffer_head *group_bh,
93 					     u32 first_new_cluster,
94 					     int new_clusters)
95 {
96 	int ret = 0;
97 	struct ocfs2_super *osb = OCFS2_SB(bm_inode->i_sb);
98 	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bm_bh->b_data;
99 	struct ocfs2_chain_list *cl = &fe->id2.i_chain;
100 	struct ocfs2_chain_rec *cr;
101 	struct ocfs2_group_desc *group;
102 	u16 chain, num_bits, backups = 0;
103 	u16 cl_bpc = le16_to_cpu(cl->cl_bpc);
104 	u16 cl_cpg = le16_to_cpu(cl->cl_cpg);
105 
106 	mlog_entry("(new_clusters=%d, first_new_cluster = %u)\n",
107 		   new_clusters, first_new_cluster);
108 
109 	ret = ocfs2_journal_access(handle, bm_inode, group_bh,
110 				   OCFS2_JOURNAL_ACCESS_WRITE);
111 	if (ret < 0) {
112 		mlog_errno(ret);
113 		goto out;
114 	}
115 
116 	group = (struct ocfs2_group_desc *)group_bh->b_data;
117 
118 	/* update the group first. */
119 	num_bits = new_clusters * cl_bpc;
120 	le16_add_cpu(&group->bg_bits, num_bits);
121 	le16_add_cpu(&group->bg_free_bits_count, num_bits);
122 
123 	/*
124 	 * check whether there are some new backup superblocks exist in
125 	 * this group and update the group bitmap accordingly.
126 	 */
127 	if (OCFS2_HAS_COMPAT_FEATURE(osb->sb,
128 				     OCFS2_FEATURE_COMPAT_BACKUP_SB)) {
129 		backups = ocfs2_calc_new_backup_super(bm_inode,
130 						     group,
131 						     new_clusters,
132 						     first_new_cluster,
133 						     cl_cpg, 1);
134 		le16_add_cpu(&group->bg_free_bits_count, -1 * backups);
135 	}
136 
137 	ret = ocfs2_journal_dirty(handle, group_bh);
138 	if (ret < 0) {
139 		mlog_errno(ret);
140 		goto out_rollback;
141 	}
142 
143 	/* update the inode accordingly. */
144 	ret = ocfs2_journal_access(handle, bm_inode, bm_bh,
145 				   OCFS2_JOURNAL_ACCESS_WRITE);
146 	if (ret < 0) {
147 		mlog_errno(ret);
148 		goto out_rollback;
149 	}
150 
151 	chain = le16_to_cpu(group->bg_chain);
152 	cr = (&cl->cl_recs[chain]);
153 	le32_add_cpu(&cr->c_total, num_bits);
154 	le32_add_cpu(&cr->c_free, num_bits);
155 	le32_add_cpu(&fe->id1.bitmap1.i_total, num_bits);
156 	le32_add_cpu(&fe->i_clusters, new_clusters);
157 
158 	if (backups) {
159 		le32_add_cpu(&cr->c_free, -1 * backups);
160 		le32_add_cpu(&fe->id1.bitmap1.i_used, backups);
161 	}
162 
163 	spin_lock(&OCFS2_I(bm_inode)->ip_lock);
164 	OCFS2_I(bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
165 	le64_add_cpu(&fe->i_size, new_clusters << osb->s_clustersize_bits);
166 	spin_unlock(&OCFS2_I(bm_inode)->ip_lock);
167 	i_size_write(bm_inode, le64_to_cpu(fe->i_size));
168 
169 	ocfs2_journal_dirty(handle, bm_bh);
170 
171 out_rollback:
172 	if (ret < 0) {
173 		ocfs2_calc_new_backup_super(bm_inode,
174 					    group,
175 					    new_clusters,
176 					    first_new_cluster,
177 					    cl_cpg, 0);
178 		le16_add_cpu(&group->bg_free_bits_count, backups);
179 		le16_add_cpu(&group->bg_bits, -1 * num_bits);
180 		le16_add_cpu(&group->bg_free_bits_count, -1 * num_bits);
181 	}
182 out:
183 	mlog_exit(ret);
184 	return ret;
185 }
186 
187 static int update_backups(struct inode * inode, u32 clusters, char *data)
188 {
189 	int i, ret = 0;
190 	u32 cluster;
191 	u64 blkno;
192 	struct buffer_head *backup = NULL;
193 	struct ocfs2_dinode *backup_di = NULL;
194 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
195 
196 	/* calculate the real backups we need to update. */
197 	for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
198 		blkno = ocfs2_backup_super_blkno(inode->i_sb, i);
199 		cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
200 		if (cluster > clusters)
201 			break;
202 
203 		ret = ocfs2_read_blocks_sync(osb, blkno, 1, &backup);
204 		if (ret < 0) {
205 			mlog_errno(ret);
206 			break;
207 		}
208 
209 		memcpy(backup->b_data, data, inode->i_sb->s_blocksize);
210 
211 		backup_di = (struct ocfs2_dinode *)backup->b_data;
212 		backup_di->i_blkno = cpu_to_le64(blkno);
213 
214 		ret = ocfs2_write_super_or_backup(osb, backup);
215 		brelse(backup);
216 		backup = NULL;
217 		if (ret < 0) {
218 			mlog_errno(ret);
219 			break;
220 		}
221 	}
222 
223 	return ret;
224 }
225 
226 static void ocfs2_update_super_and_backups(struct inode *inode,
227 					   int new_clusters)
228 {
229 	int ret;
230 	u32 clusters = 0;
231 	struct buffer_head *super_bh = NULL;
232 	struct ocfs2_dinode *super_di = NULL;
233 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
234 
235 	/*
236 	 * update the superblock last.
237 	 * It doesn't matter if the write failed.
238 	 */
239 	ret = ocfs2_read_blocks_sync(osb, OCFS2_SUPER_BLOCK_BLKNO, 1,
240 				     &super_bh);
241 	if (ret < 0) {
242 		mlog_errno(ret);
243 		goto out;
244 	}
245 
246 	super_di = (struct ocfs2_dinode *)super_bh->b_data;
247 	le32_add_cpu(&super_di->i_clusters, new_clusters);
248 	clusters = le32_to_cpu(super_di->i_clusters);
249 
250 	ret = ocfs2_write_super_or_backup(osb, super_bh);
251 	if (ret < 0) {
252 		mlog_errno(ret);
253 		goto out;
254 	}
255 
256 	if (OCFS2_HAS_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_COMPAT_BACKUP_SB))
257 		ret = update_backups(inode, clusters, super_bh->b_data);
258 
259 out:
260 	brelse(super_bh);
261 	if (ret)
262 		printk(KERN_WARNING "ocfs2: Failed to update super blocks on %s"
263 			" during fs resize. This condition is not fatal,"
264 			" but fsck.ocfs2 should be run to fix it\n",
265 			osb->dev_str);
266 	return;
267 }
268 
269 /*
270  * Extend the filesystem to the new number of clusters specified.  This entry
271  * point is only used to extend the current filesystem to the end of the last
272  * existing group.
273  */
274 int ocfs2_group_extend(struct inode * inode, int new_clusters)
275 {
276 	int ret;
277 	handle_t *handle;
278 	struct buffer_head *main_bm_bh = NULL;
279 	struct buffer_head *group_bh = NULL;
280 	struct inode *main_bm_inode = NULL;
281 	struct ocfs2_dinode *fe = NULL;
282 	struct ocfs2_group_desc *group = NULL;
283 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
284 	u16 cl_bpc;
285 	u32 first_new_cluster;
286 	u64 lgd_blkno;
287 
288 	mlog_entry_void();
289 
290 	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
291 		return -EROFS;
292 
293 	if (new_clusters < 0)
294 		return -EINVAL;
295 	else if (new_clusters == 0)
296 		return 0;
297 
298 	main_bm_inode = ocfs2_get_system_file_inode(osb,
299 						    GLOBAL_BITMAP_SYSTEM_INODE,
300 						    OCFS2_INVALID_SLOT);
301 	if (!main_bm_inode) {
302 		ret = -EINVAL;
303 		mlog_errno(ret);
304 		goto out;
305 	}
306 
307 	mutex_lock(&main_bm_inode->i_mutex);
308 
309 	ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
310 	if (ret < 0) {
311 		mlog_errno(ret);
312 		goto out_mutex;
313 	}
314 
315 	fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
316 
317 	if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
318 				 ocfs2_group_bitmap_size(osb->sb) * 8) {
319 		mlog(ML_ERROR, "The disk is too old and small. "
320 		     "Force to do offline resize.");
321 		ret = -EINVAL;
322 		goto out_unlock;
323 	}
324 
325 	if (!OCFS2_IS_VALID_DINODE(fe)) {
326 		OCFS2_RO_ON_INVALID_DINODE(main_bm_inode->i_sb, fe);
327 		ret = -EIO;
328 		goto out_unlock;
329 	}
330 
331 	first_new_cluster = le32_to_cpu(fe->i_clusters);
332 	lgd_blkno = ocfs2_which_cluster_group(main_bm_inode,
333 					      first_new_cluster - 1);
334 
335 	ret = ocfs2_read_block(main_bm_inode, lgd_blkno, &group_bh);
336 	if (ret < 0) {
337 		mlog_errno(ret);
338 		goto out_unlock;
339 	}
340 
341 	group = (struct ocfs2_group_desc *)group_bh->b_data;
342 
343 	ret = ocfs2_check_group_descriptor(inode->i_sb, fe, group);
344 	if (ret) {
345 		mlog_errno(ret);
346 		goto out_unlock;
347 	}
348 
349 	cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
350 	if (le16_to_cpu(group->bg_bits) / cl_bpc + new_clusters >
351 		le16_to_cpu(fe->id2.i_chain.cl_cpg)) {
352 		ret = -EINVAL;
353 		goto out_unlock;
354 	}
355 
356 	mlog(0, "extend the last group at %llu, new clusters = %d\n",
357 	     (unsigned long long)le64_to_cpu(group->bg_blkno), new_clusters);
358 
359 	handle = ocfs2_start_trans(osb, OCFS2_GROUP_EXTEND_CREDITS);
360 	if (IS_ERR(handle)) {
361 		mlog_errno(PTR_ERR(handle));
362 		ret = -EINVAL;
363 		goto out_unlock;
364 	}
365 
366 	/* update the last group descriptor and inode. */
367 	ret = ocfs2_update_last_group_and_inode(handle, main_bm_inode,
368 						main_bm_bh, group_bh,
369 						first_new_cluster,
370 						new_clusters);
371 	if (ret) {
372 		mlog_errno(ret);
373 		goto out_commit;
374 	}
375 
376 	ocfs2_update_super_and_backups(main_bm_inode, new_clusters);
377 
378 out_commit:
379 	ocfs2_commit_trans(osb, handle);
380 out_unlock:
381 	brelse(group_bh);
382 	brelse(main_bm_bh);
383 
384 	ocfs2_inode_unlock(main_bm_inode, 1);
385 
386 out_mutex:
387 	mutex_unlock(&main_bm_inode->i_mutex);
388 	iput(main_bm_inode);
389 
390 out:
391 	mlog_exit_void();
392 	return ret;
393 }
394 
395 static int ocfs2_check_new_group(struct inode *inode,
396 				 struct ocfs2_dinode *di,
397 				 struct ocfs2_new_group_input *input,
398 				 struct buffer_head *group_bh)
399 {
400 	int ret;
401 	struct ocfs2_group_desc *gd;
402 	u16 cl_bpc = le16_to_cpu(di->id2.i_chain.cl_bpc);
403 	unsigned int max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) *
404 				le16_to_cpu(di->id2.i_chain.cl_bpc);
405 
406 
407 	gd = (struct ocfs2_group_desc *)group_bh->b_data;
408 
409 	ret = -EIO;
410 	if (!OCFS2_IS_VALID_GROUP_DESC(gd))
411 		mlog(ML_ERROR, "Group descriptor # %llu isn't valid.\n",
412 		     (unsigned long long)le64_to_cpu(gd->bg_blkno));
413 	else if (di->i_blkno != gd->bg_parent_dinode)
414 		mlog(ML_ERROR, "Group descriptor # %llu has bad parent "
415 		     "pointer (%llu, expected %llu)\n",
416 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
417 		     (unsigned long long)le64_to_cpu(gd->bg_parent_dinode),
418 		     (unsigned long long)le64_to_cpu(di->i_blkno));
419 	else if (le16_to_cpu(gd->bg_bits) > max_bits)
420 		mlog(ML_ERROR, "Group descriptor # %llu has bit count of %u\n",
421 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
422 		     le16_to_cpu(gd->bg_bits));
423 	else if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits))
424 		mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
425 		     "claims that %u are free\n",
426 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
427 		     le16_to_cpu(gd->bg_bits),
428 		     le16_to_cpu(gd->bg_free_bits_count));
429 	else if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size)))
430 		mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
431 		     "max bitmap bits of %u\n",
432 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
433 		     le16_to_cpu(gd->bg_bits),
434 		     8 * le16_to_cpu(gd->bg_size));
435 	else if (le16_to_cpu(gd->bg_chain) != input->chain)
436 		mlog(ML_ERROR, "Group descriptor # %llu has bad chain %u "
437 		     "while input has %u set.\n",
438 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
439 		     le16_to_cpu(gd->bg_chain), input->chain);
440 	else if (le16_to_cpu(gd->bg_bits) != input->clusters * cl_bpc)
441 		mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
442 		     "input has %u clusters set\n",
443 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
444 		     le16_to_cpu(gd->bg_bits), input->clusters);
445 	else if (le16_to_cpu(gd->bg_free_bits_count) != input->frees * cl_bpc)
446 		mlog(ML_ERROR, "Group descriptor # %llu has free bit count %u "
447 		     "but it should have %u set\n",
448 		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
449 		     le16_to_cpu(gd->bg_bits),
450 		     input->frees * cl_bpc);
451 	else
452 		ret = 0;
453 
454 	return ret;
455 }
456 
457 static int ocfs2_verify_group_and_input(struct inode *inode,
458 					struct ocfs2_dinode *di,
459 					struct ocfs2_new_group_input *input,
460 					struct buffer_head *group_bh)
461 {
462 	u16 cl_count = le16_to_cpu(di->id2.i_chain.cl_count);
463 	u16 cl_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
464 	u16 next_free = le16_to_cpu(di->id2.i_chain.cl_next_free_rec);
465 	u32 cluster = ocfs2_blocks_to_clusters(inode->i_sb, input->group);
466 	u32 total_clusters = le32_to_cpu(di->i_clusters);
467 	int ret = -EINVAL;
468 
469 	if (cluster < total_clusters)
470 		mlog(ML_ERROR, "add a group which is in the current volume.\n");
471 	else if (input->chain >= cl_count)
472 		mlog(ML_ERROR, "input chain exceeds the limit.\n");
473 	else if (next_free != cl_count && next_free != input->chain)
474 		mlog(ML_ERROR,
475 		     "the add group should be in chain %u\n", next_free);
476 	else if (total_clusters + input->clusters < total_clusters)
477 		mlog(ML_ERROR, "add group's clusters overflow.\n");
478 	else if (input->clusters > cl_cpg)
479 		mlog(ML_ERROR, "the cluster exceeds the maximum of a group\n");
480 	else if (input->frees > input->clusters)
481 		mlog(ML_ERROR, "the free cluster exceeds the total clusters\n");
482 	else if (total_clusters % cl_cpg != 0)
483 		mlog(ML_ERROR,
484 		     "the last group isn't full. Use group extend first.\n");
485 	else if (input->group != ocfs2_which_cluster_group(inode, cluster))
486 		mlog(ML_ERROR, "group blkno is invalid\n");
487 	else if ((ret = ocfs2_check_new_group(inode, di, input, group_bh)))
488 		mlog(ML_ERROR, "group descriptor check failed.\n");
489 	else
490 		ret = 0;
491 
492 	return ret;
493 }
494 
495 /* Add a new group descriptor to global_bitmap. */
496 int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
497 {
498 	int ret;
499 	handle_t *handle;
500 	struct buffer_head *main_bm_bh = NULL;
501 	struct inode *main_bm_inode = NULL;
502 	struct ocfs2_dinode *fe = NULL;
503 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
504 	struct buffer_head *group_bh = NULL;
505 	struct ocfs2_group_desc *group = NULL;
506 	struct ocfs2_chain_list *cl;
507 	struct ocfs2_chain_rec *cr;
508 	u16 cl_bpc;
509 
510 	mlog_entry_void();
511 
512 	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
513 		return -EROFS;
514 
515 	main_bm_inode = ocfs2_get_system_file_inode(osb,
516 						    GLOBAL_BITMAP_SYSTEM_INODE,
517 						    OCFS2_INVALID_SLOT);
518 	if (!main_bm_inode) {
519 		ret = -EINVAL;
520 		mlog_errno(ret);
521 		goto out;
522 	}
523 
524 	mutex_lock(&main_bm_inode->i_mutex);
525 
526 	ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
527 	if (ret < 0) {
528 		mlog_errno(ret);
529 		goto out_mutex;
530 	}
531 
532 	fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
533 
534 	if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
535 				 ocfs2_group_bitmap_size(osb->sb) * 8) {
536 		mlog(ML_ERROR, "The disk is too old and small."
537 		     " Force to do offline resize.");
538 		ret = -EINVAL;
539 		goto out_unlock;
540 	}
541 
542 	ret = ocfs2_read_blocks_sync(osb, input->group, 1, &group_bh);
543 	if (ret < 0) {
544 		mlog(ML_ERROR, "Can't read the group descriptor # %llu "
545 		     "from the device.", (unsigned long long)input->group);
546 		goto out_unlock;
547 	}
548 
549 	ocfs2_set_new_buffer_uptodate(inode, group_bh);
550 
551 	ret = ocfs2_verify_group_and_input(main_bm_inode, fe, input, group_bh);
552 	if (ret) {
553 		mlog_errno(ret);
554 		goto out_unlock;
555 	}
556 
557 	mlog(0, "Add a new group  %llu in chain = %u, length = %u\n",
558 	     (unsigned long long)input->group, input->chain, input->clusters);
559 
560 	handle = ocfs2_start_trans(osb, OCFS2_GROUP_ADD_CREDITS);
561 	if (IS_ERR(handle)) {
562 		mlog_errno(PTR_ERR(handle));
563 		ret = -EINVAL;
564 		goto out_unlock;
565 	}
566 
567 	cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
568 	cl = &fe->id2.i_chain;
569 	cr = &cl->cl_recs[input->chain];
570 
571 	ret = ocfs2_journal_access(handle, main_bm_inode, group_bh,
572 				   OCFS2_JOURNAL_ACCESS_WRITE);
573 	if (ret < 0) {
574 		mlog_errno(ret);
575 		goto out_commit;
576 	}
577 
578 	group = (struct ocfs2_group_desc *)group_bh->b_data;
579 	group->bg_next_group = cr->c_blkno;
580 
581 	ret = ocfs2_journal_dirty(handle, group_bh);
582 	if (ret < 0) {
583 		mlog_errno(ret);
584 		goto out_commit;
585 	}
586 
587 	ret = ocfs2_journal_access(handle, main_bm_inode, main_bm_bh,
588 				   OCFS2_JOURNAL_ACCESS_WRITE);
589 	if (ret < 0) {
590 		mlog_errno(ret);
591 		goto out_commit;
592 	}
593 
594 	if (input->chain == le16_to_cpu(cl->cl_next_free_rec)) {
595 		le16_add_cpu(&cl->cl_next_free_rec, 1);
596 		memset(cr, 0, sizeof(struct ocfs2_chain_rec));
597 	}
598 
599 	cr->c_blkno = cpu_to_le64(input->group);
600 	le32_add_cpu(&cr->c_total, input->clusters * cl_bpc);
601 	le32_add_cpu(&cr->c_free, input->frees * cl_bpc);
602 
603 	le32_add_cpu(&fe->id1.bitmap1.i_total, input->clusters *cl_bpc);
604 	le32_add_cpu(&fe->id1.bitmap1.i_used,
605 		     (input->clusters - input->frees) * cl_bpc);
606 	le32_add_cpu(&fe->i_clusters, input->clusters);
607 
608 	ocfs2_journal_dirty(handle, main_bm_bh);
609 
610 	spin_lock(&OCFS2_I(main_bm_inode)->ip_lock);
611 	OCFS2_I(main_bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
612 	le64_add_cpu(&fe->i_size, input->clusters << osb->s_clustersize_bits);
613 	spin_unlock(&OCFS2_I(main_bm_inode)->ip_lock);
614 	i_size_write(main_bm_inode, le64_to_cpu(fe->i_size));
615 
616 	ocfs2_update_super_and_backups(main_bm_inode, input->clusters);
617 
618 out_commit:
619 	ocfs2_commit_trans(osb, handle);
620 out_unlock:
621 	brelse(group_bh);
622 	brelse(main_bm_bh);
623 
624 	ocfs2_inode_unlock(main_bm_inode, 1);
625 
626 out_mutex:
627 	mutex_unlock(&main_bm_inode->i_mutex);
628 	iput(main_bm_inode);
629 
630 out:
631 	mlog_exit_void();
632 	return ret;
633 }
634