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d659072f TM |
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 | ||
da1e9098 | 203 | ret = ocfs2_read_blocks_sync(osb, blkno, 1, &backup); |
d659072f TM |
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 | */ | |
da1e9098 JB |
239 | ret = ocfs2_read_blocks_sync(osb, OCFS2_SUPER_BLOCK_BLKNO, 1, |
240 | &super_bh); | |
d659072f TM |
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: | |
2fe5c1d7 | 260 | brelse(super_bh); |
d659072f TM |
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 | ||
0fcaa56a | 335 | ret = ocfs2_read_block(main_bm_inode, lgd_blkno, &group_bh); |
d659072f TM |
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", | |
7909f2bf | 357 | (unsigned long long)le64_to_cpu(group->bg_blkno), new_clusters); |
d659072f TM |
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: | |
2fe5c1d7 MF |
381 | brelse(group_bh); |
382 | brelse(main_bm_bh); | |
d659072f TM |
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 | } | |
7909f2bf TM |
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 | ||
da1e9098 | 542 | ret = ocfs2_read_blocks_sync(osb, input->group, 1, &group_bh); |
7909f2bf TM |
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 | ||
4338ab6a | 599 | cr->c_blkno = cpu_to_le64(input->group); |
7909f2bf TM |
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: | |
2fe5c1d7 MF |
621 | brelse(group_bh); |
622 | brelse(main_bm_bh); | |
7909f2bf TM |
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 | } |