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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
49
50
51
52
53
54static 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
89static 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_gd(handle, INODE_CACHE(bm_inode),
110 group_bh, 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
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
125
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
144 ret = ocfs2_journal_access_di(handle, INODE_CACHE(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
171out_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 }
182out:
183 mlog_exit(ret);
184 return ret;
185}
186
187static 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
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
226static 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
237
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
259out:
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
271
272
273
274int 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
318
319 BUG_ON(!OCFS2_IS_VALID_DINODE(fe));
320
321 if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
322 ocfs2_group_bitmap_size(osb->sb) * 8) {
323 mlog(ML_ERROR, "The disk is too old and small. "
324 "Force to do offline resize.");
325 ret = -EINVAL;
326 goto out_unlock;
327 }
328
329 first_new_cluster = le32_to_cpu(fe->i_clusters);
330 lgd_blkno = ocfs2_which_cluster_group(main_bm_inode,
331 first_new_cluster - 1);
332
333 ret = ocfs2_read_group_descriptor(main_bm_inode, fe, lgd_blkno,
334 &group_bh);
335 if (ret < 0) {
336 mlog_errno(ret);
337 goto out_unlock;
338 }
339 group = (struct ocfs2_group_desc *)group_bh->b_data;
340
341 cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
342 if (le16_to_cpu(group->bg_bits) / cl_bpc + new_clusters >
343 le16_to_cpu(fe->id2.i_chain.cl_cpg)) {
344 ret = -EINVAL;
345 goto out_unlock;
346 }
347
348 mlog(0, "extend the last group at %llu, new clusters = %d\n",
349 (unsigned long long)le64_to_cpu(group->bg_blkno), new_clusters);
350
351 handle = ocfs2_start_trans(osb, OCFS2_GROUP_EXTEND_CREDITS);
352 if (IS_ERR(handle)) {
353 mlog_errno(PTR_ERR(handle));
354 ret = -EINVAL;
355 goto out_unlock;
356 }
357
358
359 ret = ocfs2_update_last_group_and_inode(handle, main_bm_inode,
360 main_bm_bh, group_bh,
361 first_new_cluster,
362 new_clusters);
363 if (ret) {
364 mlog_errno(ret);
365 goto out_commit;
366 }
367
368 ocfs2_update_super_and_backups(main_bm_inode, new_clusters);
369
370out_commit:
371 ocfs2_commit_trans(osb, handle);
372out_unlock:
373 brelse(group_bh);
374 brelse(main_bm_bh);
375
376 ocfs2_inode_unlock(main_bm_inode, 1);
377
378out_mutex:
379 mutex_unlock(&main_bm_inode->i_mutex);
380 iput(main_bm_inode);
381
382out:
383 mlog_exit_void();
384 return ret;
385}
386
387static int ocfs2_check_new_group(struct inode *inode,
388 struct ocfs2_dinode *di,
389 struct ocfs2_new_group_input *input,
390 struct buffer_head *group_bh)
391{
392 int ret;
393 struct ocfs2_group_desc *gd =
394 (struct ocfs2_group_desc *)group_bh->b_data;
395 u16 cl_bpc = le16_to_cpu(di->id2.i_chain.cl_bpc);
396
397 ret = ocfs2_check_group_descriptor(inode->i_sb, di, group_bh);
398 if (ret)
399 goto out;
400
401 ret = -EINVAL;
402 if (le16_to_cpu(gd->bg_chain) != input->chain)
403 mlog(ML_ERROR, "Group descriptor # %llu has bad chain %u "
404 "while input has %u set.\n",
405 (unsigned long long)le64_to_cpu(gd->bg_blkno),
406 le16_to_cpu(gd->bg_chain), input->chain);
407 else if (le16_to_cpu(gd->bg_bits) != input->clusters * cl_bpc)
408 mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
409 "input has %u clusters set\n",
410 (unsigned long long)le64_to_cpu(gd->bg_blkno),
411 le16_to_cpu(gd->bg_bits), input->clusters);
412 else if (le16_to_cpu(gd->bg_free_bits_count) != input->frees * cl_bpc)
413 mlog(ML_ERROR, "Group descriptor # %llu has free bit count %u "
414 "but it should have %u set\n",
415 (unsigned long long)le64_to_cpu(gd->bg_blkno),
416 le16_to_cpu(gd->bg_bits),
417 input->frees * cl_bpc);
418 else
419 ret = 0;
420
421out:
422 return ret;
423}
424
425static int ocfs2_verify_group_and_input(struct inode *inode,
426 struct ocfs2_dinode *di,
427 struct ocfs2_new_group_input *input,
428 struct buffer_head *group_bh)
429{
430 u16 cl_count = le16_to_cpu(di->id2.i_chain.cl_count);
431 u16 cl_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
432 u16 next_free = le16_to_cpu(di->id2.i_chain.cl_next_free_rec);
433 u32 cluster = ocfs2_blocks_to_clusters(inode->i_sb, input->group);
434 u32 total_clusters = le32_to_cpu(di->i_clusters);
435 int ret = -EINVAL;
436
437 if (cluster < total_clusters)
438 mlog(ML_ERROR, "add a group which is in the current volume.\n");
439 else if (input->chain >= cl_count)
440 mlog(ML_ERROR, "input chain exceeds the limit.\n");
441 else if (next_free != cl_count && next_free != input->chain)
442 mlog(ML_ERROR,
443 "the add group should be in chain %u\n", next_free);
444 else if (total_clusters + input->clusters < total_clusters)
445 mlog(ML_ERROR, "add group's clusters overflow.\n");
446 else if (input->clusters > cl_cpg)
447 mlog(ML_ERROR, "the cluster exceeds the maximum of a group\n");
448 else if (input->frees > input->clusters)
449 mlog(ML_ERROR, "the free cluster exceeds the total clusters\n");
450 else if (total_clusters % cl_cpg != 0)
451 mlog(ML_ERROR,
452 "the last group isn't full. Use group extend first.\n");
453 else if (input->group != ocfs2_which_cluster_group(inode, cluster))
454 mlog(ML_ERROR, "group blkno is invalid\n");
455 else if ((ret = ocfs2_check_new_group(inode, di, input, group_bh)))
456 mlog(ML_ERROR, "group descriptor check failed.\n");
457 else
458 ret = 0;
459
460 return ret;
461}
462
463
464int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
465{
466 int ret;
467 handle_t *handle;
468 struct buffer_head *main_bm_bh = NULL;
469 struct inode *main_bm_inode = NULL;
470 struct ocfs2_dinode *fe = NULL;
471 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
472 struct buffer_head *group_bh = NULL;
473 struct ocfs2_group_desc *group = NULL;
474 struct ocfs2_chain_list *cl;
475 struct ocfs2_chain_rec *cr;
476 u16 cl_bpc;
477
478 mlog_entry_void();
479
480 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
481 return -EROFS;
482
483 main_bm_inode = ocfs2_get_system_file_inode(osb,
484 GLOBAL_BITMAP_SYSTEM_INODE,
485 OCFS2_INVALID_SLOT);
486 if (!main_bm_inode) {
487 ret = -EINVAL;
488 mlog_errno(ret);
489 goto out;
490 }
491
492 mutex_lock(&main_bm_inode->i_mutex);
493
494 ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
495 if (ret < 0) {
496 mlog_errno(ret);
497 goto out_mutex;
498 }
499
500 fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
501
502 if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
503 ocfs2_group_bitmap_size(osb->sb) * 8) {
504 mlog(ML_ERROR, "The disk is too old and small."
505 " Force to do offline resize.");
506 ret = -EINVAL;
507 goto out_unlock;
508 }
509
510 ret = ocfs2_read_blocks_sync(osb, input->group, 1, &group_bh);
511 if (ret < 0) {
512 mlog(ML_ERROR, "Can't read the group descriptor # %llu "
513 "from the device.", (unsigned long long)input->group);
514 goto out_unlock;
515 }
516
517 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), group_bh);
518
519 ret = ocfs2_verify_group_and_input(main_bm_inode, fe, input, group_bh);
520 if (ret) {
521 mlog_errno(ret);
522 goto out_unlock;
523 }
524
525 mlog(0, "Add a new group %llu in chain = %u, length = %u\n",
526 (unsigned long long)input->group, input->chain, input->clusters);
527
528 handle = ocfs2_start_trans(osb, OCFS2_GROUP_ADD_CREDITS);
529 if (IS_ERR(handle)) {
530 mlog_errno(PTR_ERR(handle));
531 ret = -EINVAL;
532 goto out_unlock;
533 }
534
535 cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
536 cl = &fe->id2.i_chain;
537 cr = &cl->cl_recs[input->chain];
538
539 ret = ocfs2_journal_access_gd(handle, INODE_CACHE(main_bm_inode),
540 group_bh, OCFS2_JOURNAL_ACCESS_WRITE);
541 if (ret < 0) {
542 mlog_errno(ret);
543 goto out_commit;
544 }
545
546 group = (struct ocfs2_group_desc *)group_bh->b_data;
547 group->bg_next_group = cr->c_blkno;
548
549 ret = ocfs2_journal_dirty(handle, group_bh);
550 if (ret < 0) {
551 mlog_errno(ret);
552 goto out_commit;
553 }
554
555 ret = ocfs2_journal_access_di(handle, INODE_CACHE(main_bm_inode),
556 main_bm_bh, OCFS2_JOURNAL_ACCESS_WRITE);
557 if (ret < 0) {
558 mlog_errno(ret);
559 goto out_commit;
560 }
561
562 if (input->chain == le16_to_cpu(cl->cl_next_free_rec)) {
563 le16_add_cpu(&cl->cl_next_free_rec, 1);
564 memset(cr, 0, sizeof(struct ocfs2_chain_rec));
565 }
566
567 cr->c_blkno = cpu_to_le64(input->group);
568 le32_add_cpu(&cr->c_total, input->clusters * cl_bpc);
569 le32_add_cpu(&cr->c_free, input->frees * cl_bpc);
570
571 le32_add_cpu(&fe->id1.bitmap1.i_total, input->clusters *cl_bpc);
572 le32_add_cpu(&fe->id1.bitmap1.i_used,
573 (input->clusters - input->frees) * cl_bpc);
574 le32_add_cpu(&fe->i_clusters, input->clusters);
575
576 ocfs2_journal_dirty(handle, main_bm_bh);
577
578 spin_lock(&OCFS2_I(main_bm_inode)->ip_lock);
579 OCFS2_I(main_bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
580 le64_add_cpu(&fe->i_size, input->clusters << osb->s_clustersize_bits);
581 spin_unlock(&OCFS2_I(main_bm_inode)->ip_lock);
582 i_size_write(main_bm_inode, le64_to_cpu(fe->i_size));
583
584 ocfs2_update_super_and_backups(main_bm_inode, input->clusters);
585
586out_commit:
587 ocfs2_commit_trans(osb, handle);
588out_unlock:
589 brelse(group_bh);
590 brelse(main_bm_bh);
591
592 ocfs2_inode_unlock(main_bm_inode, 1);
593
594out_mutex:
595 mutex_unlock(&main_bm_inode->i_mutex);
596 iput(main_bm_inode);
597
598out:
599 mlog_exit_void();
600 return ret;
601}
602
