Merge branch 'topic/asoc' into for-linus
[linux-2.6] / fs / ocfs2 / quota_local.c
1 /*
2  *  Implementation of operations over local quota file
3  */
4
5 #include <linux/fs.h>
6 #include <linux/quota.h>
7 #include <linux/quotaops.h>
8 #include <linux/module.h>
9
10 #define MLOG_MASK_PREFIX ML_QUOTA
11 #include <cluster/masklog.h>
12
13 #include "ocfs2_fs.h"
14 #include "ocfs2.h"
15 #include "inode.h"
16 #include "alloc.h"
17 #include "file.h"
18 #include "buffer_head_io.h"
19 #include "journal.h"
20 #include "sysfile.h"
21 #include "dlmglue.h"
22 #include "quota.h"
23
24 /* Number of local quota structures per block */
25 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
26 {
27         return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
28                 sizeof(struct ocfs2_local_disk_dqblk));
29 }
30
31 /* Number of blocks with entries in one chunk */
32 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
33 {
34         return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
35                  OCFS2_QBLK_RESERVED_SPACE) << 3) /
36                ol_quota_entries_per_block(sb);
37 }
38
39 /* Number of entries in a chunk bitmap */
40 static unsigned int ol_chunk_entries(struct super_block *sb)
41 {
42         return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
43 }
44
45 /* Offset of the chunk in quota file */
46 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
47 {
48         /* 1 block for local quota file info, 1 block per chunk for chunk info */
49         return 1 + (ol_chunk_blocks(sb) + 1) * c;
50 }
51
52 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
53 {
54         int epb = ol_quota_entries_per_block(sb);
55
56         return ol_quota_chunk_block(sb, c) + 1 + off / epb;
57 }
58
59 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
60 {
61         int epb = ol_quota_entries_per_block(sb);
62
63         return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
64 }
65
66 /* Offset of the dquot structure in the quota file */
67 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
68 {
69         return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
70                ol_dqblk_block_off(sb, c, off);
71 }
72
73 /* Compute block number from given offset */
74 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
75 {
76         return off >> sb->s_blocksize_bits;
77 }
78
79 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
80 {
81         return off & ((1 << sb->s_blocksize_bits) - 1);
82 }
83
84 /* Compute offset in the chunk of a structure with the given offset */
85 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
86 {
87         int epb = ol_quota_entries_per_block(sb);
88
89         return ((off >> sb->s_blocksize_bits) -
90                         ol_quota_chunk_block(sb, c) - 1) * epb
91                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
92                  sizeof(struct ocfs2_local_disk_dqblk);
93 }
94
95 /* Write bufferhead into the fs */
96 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
97                 void (*modify)(struct buffer_head *, void *), void *private)
98 {
99         struct super_block *sb = inode->i_sb;
100         handle_t *handle;
101         int status;
102
103         handle = ocfs2_start_trans(OCFS2_SB(sb), 1);
104         if (IS_ERR(handle)) {
105                 status = PTR_ERR(handle);
106                 mlog_errno(status);
107                 return status;
108         }
109         status = ocfs2_journal_access_dq(handle, inode, bh,
110                                          OCFS2_JOURNAL_ACCESS_WRITE);
111         if (status < 0) {
112                 mlog_errno(status);
113                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
114                 return status;
115         }
116         lock_buffer(bh);
117         modify(bh, private);
118         unlock_buffer(bh);
119         status = ocfs2_journal_dirty(handle, bh);
120         if (status < 0) {
121                 mlog_errno(status);
122                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
123                 return status;
124         }
125         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
126         if (status < 0) {
127                 mlog_errno(status);
128                 return status;
129         }
130         return 0;
131 }
132
133 /* Check whether we understand format of quota files */
134 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
135 {
136         unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
137         unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
138         unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
139         unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
140         unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
141                                         GROUP_QUOTA_SYSTEM_INODE };
142         struct buffer_head *bh = NULL;
143         struct inode *linode = sb_dqopt(sb)->files[type];
144         struct inode *ginode = NULL;
145         struct ocfs2_disk_dqheader *dqhead;
146         int status, ret = 0;
147
148         /* First check whether we understand local quota file */
149         status = ocfs2_read_quota_block(linode, 0, &bh);
150         if (status) {
151                 mlog_errno(status);
152                 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
153                         type);
154                 goto out_err;
155         }
156         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
157         if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
158                 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
159                         " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
160                         lmagics[type], type);
161                 goto out_err;
162         }
163         if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
164                 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
165                         " type=%d\n", le32_to_cpu(dqhead->dqh_version),
166                         lversions[type], type);
167                 goto out_err;
168         }
169         brelse(bh);
170         bh = NULL;
171
172         /* Next check whether we understand global quota file */
173         ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
174                                                 OCFS2_INVALID_SLOT);
175         if (!ginode) {
176                 mlog(ML_ERROR, "cannot get global quota file inode "
177                                 "(type=%d)\n", type);
178                 goto out_err;
179         }
180         /* Since the header is read only, we don't care about locking */
181         status = ocfs2_read_quota_block(ginode, 0, &bh);
182         if (status) {
183                 mlog_errno(status);
184                 mlog(ML_ERROR, "failed to read global quota file header "
185                                 "(type=%d)\n", type);
186                 goto out_err;
187         }
188         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
189         if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
190                 mlog(ML_ERROR, "global quota file magic does not match "
191                         "(%u != %u), type=%d\n",
192                         le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
193                 goto out_err;
194         }
195         if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
196                 mlog(ML_ERROR, "global quota file version does not match "
197                         "(%u != %u), type=%d\n",
198                         le32_to_cpu(dqhead->dqh_version), gversions[type],
199                         type);
200                 goto out_err;
201         }
202
203         ret = 1;
204 out_err:
205         brelse(bh);
206         iput(ginode);
207         return ret;
208 }
209
210 /* Release given list of quota file chunks */
211 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
212 {
213         struct ocfs2_quota_chunk *pos, *next;
214
215         list_for_each_entry_safe(pos, next, head, qc_chunk) {
216                 list_del(&pos->qc_chunk);
217                 brelse(pos->qc_headerbh);
218                 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
219         }
220 }
221
222 /* Load quota bitmaps into memory */
223 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
224                         struct ocfs2_local_disk_dqinfo *ldinfo,
225                         struct list_head *head)
226 {
227         struct ocfs2_quota_chunk *newchunk;
228         int i, status;
229
230         INIT_LIST_HEAD(head);
231         for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
232                 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
233                 if (!newchunk) {
234                         ocfs2_release_local_quota_bitmaps(head);
235                         return -ENOMEM;
236                 }
237                 newchunk->qc_num = i;
238                 newchunk->qc_headerbh = NULL;
239                 status = ocfs2_read_quota_block(inode,
240                                 ol_quota_chunk_block(inode->i_sb, i),
241                                 &newchunk->qc_headerbh);
242                 if (status) {
243                         mlog_errno(status);
244                         kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
245                         ocfs2_release_local_quota_bitmaps(head);
246                         return status;
247                 }
248                 list_add_tail(&newchunk->qc_chunk, head);
249         }
250         return 0;
251 }
252
253 static void olq_update_info(struct buffer_head *bh, void *private)
254 {
255         struct mem_dqinfo *info = private;
256         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
257         struct ocfs2_local_disk_dqinfo *ldinfo;
258
259         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
260                                                 OCFS2_LOCAL_INFO_OFF);
261         spin_lock(&dq_data_lock);
262         ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
263         ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
264         ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
265         spin_unlock(&dq_data_lock);
266 }
267
268 static int ocfs2_add_recovery_chunk(struct super_block *sb,
269                                     struct ocfs2_local_disk_chunk *dchunk,
270                                     int chunk,
271                                     struct list_head *head)
272 {
273         struct ocfs2_recovery_chunk *rc;
274
275         rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
276         if (!rc)
277                 return -ENOMEM;
278         rc->rc_chunk = chunk;
279         rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
280         if (!rc->rc_bitmap) {
281                 kfree(rc);
282                 return -ENOMEM;
283         }
284         memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
285                (ol_chunk_entries(sb) + 7) >> 3);
286         list_add_tail(&rc->rc_list, head);
287         return 0;
288 }
289
290 static void free_recovery_list(struct list_head *head)
291 {
292         struct ocfs2_recovery_chunk *next;
293         struct ocfs2_recovery_chunk *rchunk;
294
295         list_for_each_entry_safe(rchunk, next, head, rc_list) {
296                 list_del(&rchunk->rc_list);
297                 kfree(rchunk->rc_bitmap);
298                 kfree(rchunk);
299         }
300 }
301
302 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
303 {
304         int type;
305
306         for (type = 0; type < MAXQUOTAS; type++)
307                 free_recovery_list(&(rec->r_list[type]));
308         kfree(rec);
309 }
310
311 /* Load entries in our quota file we have to recover*/
312 static int ocfs2_recovery_load_quota(struct inode *lqinode,
313                                      struct ocfs2_local_disk_dqinfo *ldinfo,
314                                      int type,
315                                      struct list_head *head)
316 {
317         struct super_block *sb = lqinode->i_sb;
318         struct buffer_head *hbh;
319         struct ocfs2_local_disk_chunk *dchunk;
320         int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
321         int status = 0;
322
323         for (i = 0; i < chunks; i++) {
324                 hbh = NULL;
325                 status = ocfs2_read_quota_block(lqinode,
326                                                 ol_quota_chunk_block(sb, i),
327                                                 &hbh);
328                 if (status) {
329                         mlog_errno(status);
330                         break;
331                 }
332                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
333                 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
334                         status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
335                 brelse(hbh);
336                 if (status < 0)
337                         break;
338         }
339         if (status < 0)
340                 free_recovery_list(head);
341         return status;
342 }
343
344 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
345 {
346         int type;
347         struct ocfs2_quota_recovery *rec;
348
349         rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
350         if (!rec)
351                 return NULL;
352         for (type = 0; type < MAXQUOTAS; type++)
353                 INIT_LIST_HEAD(&(rec->r_list[type]));
354         return rec;
355 }
356
357 /* Load information we need for quota recovery into memory */
358 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
359                                                 struct ocfs2_super *osb,
360                                                 int slot_num)
361 {
362         unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
363                                             OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
364         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
365                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
366         struct super_block *sb = osb->sb;
367         struct ocfs2_local_disk_dqinfo *ldinfo;
368         struct inode *lqinode;
369         struct buffer_head *bh;
370         int type;
371         int status = 0;
372         struct ocfs2_quota_recovery *rec;
373
374         mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
375         rec = ocfs2_alloc_quota_recovery();
376         if (!rec)
377                 return ERR_PTR(-ENOMEM);
378         /* First init... */
379
380         for (type = 0; type < MAXQUOTAS; type++) {
381                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
382                         continue;
383                 /* At this point, journal of the slot is already replayed so
384                  * we can trust metadata and data of the quota file */
385                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
386                 if (!lqinode) {
387                         status = -ENOENT;
388                         goto out;
389                 }
390                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
391                                                OCFS2_META_LOCK_RECOVERY);
392                 if (status < 0) {
393                         mlog_errno(status);
394                         goto out_put;
395                 }
396                 /* Now read local header */
397                 bh = NULL;
398                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
399                 if (status) {
400                         mlog_errno(status);
401                         mlog(ML_ERROR, "failed to read quota file info header "
402                                 "(slot=%d type=%d)\n", slot_num, type);
403                         goto out_lock;
404                 }
405                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
406                                                         OCFS2_LOCAL_INFO_OFF);
407                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
408                                                    &rec->r_list[type]);
409                 brelse(bh);
410 out_lock:
411                 ocfs2_inode_unlock(lqinode, 1);
412 out_put:
413                 iput(lqinode);
414                 if (status < 0)
415                         break;
416         }
417 out:
418         if (status < 0) {
419                 ocfs2_free_quota_recovery(rec);
420                 rec = ERR_PTR(status);
421         }
422         return rec;
423 }
424
425 /* Sync changes in local quota file into global quota file and
426  * reinitialize local quota file.
427  * The function expects local quota file to be already locked and
428  * dqonoff_mutex locked. */
429 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
430                                           int type,
431                                           struct ocfs2_quota_recovery *rec)
432 {
433         struct super_block *sb = lqinode->i_sb;
434         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
435         struct ocfs2_local_disk_chunk *dchunk;
436         struct ocfs2_local_disk_dqblk *dqblk;
437         struct dquot *dquot;
438         handle_t *handle;
439         struct buffer_head *hbh = NULL, *qbh = NULL;
440         int status = 0;
441         int bit, chunk;
442         struct ocfs2_recovery_chunk *rchunk, *next;
443         qsize_t spacechange, inodechange;
444
445         mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
446
447         status = ocfs2_lock_global_qf(oinfo, 1);
448         if (status < 0)
449                 goto out;
450
451         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
452                 chunk = rchunk->rc_chunk;
453                 hbh = NULL;
454                 status = ocfs2_read_quota_block(lqinode,
455                                                 ol_quota_chunk_block(sb, chunk),
456                                                 &hbh);
457                 if (status) {
458                         mlog_errno(status);
459                         break;
460                 }
461                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
462                 for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
463                         qbh = NULL;
464                         status = ocfs2_read_quota_block(lqinode,
465                                                 ol_dqblk_block(sb, chunk, bit),
466                                                 &qbh);
467                         if (status) {
468                                 mlog_errno(status);
469                                 break;
470                         }
471                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
472                                 ol_dqblk_block_off(sb, chunk, bit));
473                         dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
474                         if (!dquot) {
475                                 status = -EIO;
476                                 mlog(ML_ERROR, "Failed to get quota structure "
477                                      "for id %u, type %d. Cannot finish quota "
478                                      "file recovery.\n",
479                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
480                                      type);
481                                 goto out_put_bh;
482                         }
483                         handle = ocfs2_start_trans(OCFS2_SB(sb),
484                                                    OCFS2_QSYNC_CREDITS);
485                         if (IS_ERR(handle)) {
486                                 status = PTR_ERR(handle);
487                                 mlog_errno(status);
488                                 goto out_put_dquot;
489                         }
490                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
491                         spin_lock(&dq_data_lock);
492                         /* Add usage from quota entry into quota changes
493                          * of our node. Auxiliary variables are important
494                          * due to signedness */
495                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
496                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
497                         dquot->dq_dqb.dqb_curspace += spacechange;
498                         dquot->dq_dqb.dqb_curinodes += inodechange;
499                         spin_unlock(&dq_data_lock);
500                         /* We want to drop reference held by the crashed
501                          * node. Since we have our own reference we know
502                          * global structure actually won't be freed. */
503                         status = ocfs2_global_release_dquot(dquot);
504                         if (status < 0) {
505                                 mlog_errno(status);
506                                 goto out_commit;
507                         }
508                         /* Release local quota file entry */
509                         status = ocfs2_journal_access_dq(handle, lqinode,
510                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
511                         if (status < 0) {
512                                 mlog_errno(status);
513                                 goto out_commit;
514                         }
515                         lock_buffer(qbh);
516                         WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
517                         ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
518                         le32_add_cpu(&dchunk->dqc_free, 1);
519                         unlock_buffer(qbh);
520                         status = ocfs2_journal_dirty(handle, qbh);
521                         if (status < 0)
522                                 mlog_errno(status);
523 out_commit:
524                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
525                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
526 out_put_dquot:
527                         dqput(dquot);
528 out_put_bh:
529                         brelse(qbh);
530                         if (status < 0)
531                                 break;
532                 }
533                 brelse(hbh);
534                 list_del(&rchunk->rc_list);
535                 kfree(rchunk->rc_bitmap);
536                 kfree(rchunk);
537                 if (status < 0)
538                         break;
539         }
540         ocfs2_unlock_global_qf(oinfo, 1);
541 out:
542         if (status < 0)
543                 free_recovery_list(&(rec->r_list[type]));
544         mlog_exit(status);
545         return status;
546 }
547
548 /* Recover local quota files for given node different from us */
549 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
550                                 struct ocfs2_quota_recovery *rec,
551                                 int slot_num)
552 {
553         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
554                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
555         struct super_block *sb = osb->sb;
556         struct ocfs2_local_disk_dqinfo *ldinfo;
557         struct buffer_head *bh;
558         handle_t *handle;
559         int type;
560         int status = 0;
561         struct inode *lqinode;
562         unsigned int flags;
563
564         mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
565         mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
566         for (type = 0; type < MAXQUOTAS; type++) {
567                 if (list_empty(&(rec->r_list[type])))
568                         continue;
569                 mlog(0, "Recovering quota in slot %d\n", slot_num);
570                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
571                 if (!lqinode) {
572                         status = -ENOENT;
573                         goto out;
574                 }
575                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
576                                                        OCFS2_META_LOCK_NOQUEUE);
577                 /* Someone else is holding the lock? Then he must be
578                  * doing the recovery. Just skip the file... */
579                 if (status == -EAGAIN) {
580                         mlog(ML_NOTICE, "skipping quota recovery for slot %d "
581                              "because quota file is locked.\n", slot_num);
582                         status = 0;
583                         goto out_put;
584                 } else if (status < 0) {
585                         mlog_errno(status);
586                         goto out_put;
587                 }
588                 /* Now read local header */
589                 bh = NULL;
590                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
591                 if (status) {
592                         mlog_errno(status);
593                         mlog(ML_ERROR, "failed to read quota file info header "
594                                 "(slot=%d type=%d)\n", slot_num, type);
595                         goto out_lock;
596                 }
597                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
598                                                         OCFS2_LOCAL_INFO_OFF);
599                 /* Is recovery still needed? */
600                 flags = le32_to_cpu(ldinfo->dqi_flags);
601                 if (!(flags & OLQF_CLEAN))
602                         status = ocfs2_recover_local_quota_file(lqinode,
603                                                                 type,
604                                                                 rec);
605                 /* We don't want to mark file as clean when it is actually
606                  * active */
607                 if (slot_num == osb->slot_num)
608                         goto out_bh;
609                 /* Mark quota file as clean if we are recovering quota file of
610                  * some other node. */
611                 handle = ocfs2_start_trans(osb, 1);
612                 if (IS_ERR(handle)) {
613                         status = PTR_ERR(handle);
614                         mlog_errno(status);
615                         goto out_bh;
616                 }
617                 status = ocfs2_journal_access_dq(handle, lqinode, bh,
618                                                  OCFS2_JOURNAL_ACCESS_WRITE);
619                 if (status < 0) {
620                         mlog_errno(status);
621                         goto out_trans;
622                 }
623                 lock_buffer(bh);
624                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
625                 unlock_buffer(bh);
626                 status = ocfs2_journal_dirty(handle, bh);
627                 if (status < 0)
628                         mlog_errno(status);
629 out_trans:
630                 ocfs2_commit_trans(osb, handle);
631 out_bh:
632                 brelse(bh);
633 out_lock:
634                 ocfs2_inode_unlock(lqinode, 1);
635 out_put:
636                 iput(lqinode);
637                 if (status < 0)
638                         break;
639         }
640 out:
641         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
642         kfree(rec);
643         return status;
644 }
645
646 /* Read information header from quota file */
647 static int ocfs2_local_read_info(struct super_block *sb, int type)
648 {
649         struct ocfs2_local_disk_dqinfo *ldinfo;
650         struct mem_dqinfo *info = sb_dqinfo(sb, type);
651         struct ocfs2_mem_dqinfo *oinfo;
652         struct inode *lqinode = sb_dqopt(sb)->files[type];
653         int status;
654         struct buffer_head *bh = NULL;
655         struct ocfs2_quota_recovery *rec;
656         int locked = 0;
657
658         info->dqi_maxblimit = 0x7fffffffffffffffLL;
659         info->dqi_maxilimit = 0x7fffffffffffffffLL;
660         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
661         if (!oinfo) {
662                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
663                                " info.");
664                 goto out_err;
665         }
666         info->dqi_priv = oinfo;
667         oinfo->dqi_type = type;
668         INIT_LIST_HEAD(&oinfo->dqi_chunk);
669         oinfo->dqi_rec = NULL;
670         oinfo->dqi_lqi_bh = NULL;
671         oinfo->dqi_ibh = NULL;
672
673         status = ocfs2_global_read_info(sb, type);
674         if (status < 0)
675                 goto out_err;
676
677         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
678         if (status < 0) {
679                 mlog_errno(status);
680                 goto out_err;
681         }
682         locked = 1;
683
684         /* Now read local header */
685         status = ocfs2_read_quota_block(lqinode, 0, &bh);
686         if (status) {
687                 mlog_errno(status);
688                 mlog(ML_ERROR, "failed to read quota file info header "
689                         "(type=%d)\n", type);
690                 goto out_err;
691         }
692         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
693                                                 OCFS2_LOCAL_INFO_OFF);
694         info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
695         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
696         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
697         oinfo->dqi_ibh = bh;
698
699         /* We crashed when using local quota file? */
700         if (!(info->dqi_flags & OLQF_CLEAN)) {
701                 rec = OCFS2_SB(sb)->quota_rec;
702                 if (!rec) {
703                         rec = ocfs2_alloc_quota_recovery();
704                         if (!rec) {
705                                 status = -ENOMEM;
706                                 mlog_errno(status);
707                                 goto out_err;
708                         }
709                         OCFS2_SB(sb)->quota_rec = rec;
710                 }
711
712                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
713                                                    &rec->r_list[type]);
714                 if (status < 0) {
715                         mlog_errno(status);
716                         goto out_err;
717                 }
718         }
719
720         status = ocfs2_load_local_quota_bitmaps(lqinode,
721                                                 ldinfo,
722                                                 &oinfo->dqi_chunk);
723         if (status < 0) {
724                 mlog_errno(status);
725                 goto out_err;
726         }
727
728         /* Now mark quota file as used */
729         info->dqi_flags &= ~OLQF_CLEAN;
730         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
731         if (status < 0) {
732                 mlog_errno(status);
733                 goto out_err;
734         }
735
736         return 0;
737 out_err:
738         if (oinfo) {
739                 iput(oinfo->dqi_gqinode);
740                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
741                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
742                 brelse(oinfo->dqi_lqi_bh);
743                 if (locked)
744                         ocfs2_inode_unlock(lqinode, 1);
745                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
746                 kfree(oinfo);
747         }
748         brelse(bh);
749         return -1;
750 }
751
752 /* Write local info to quota file */
753 static int ocfs2_local_write_info(struct super_block *sb, int type)
754 {
755         struct mem_dqinfo *info = sb_dqinfo(sb, type);
756         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
757                                                 ->dqi_ibh;
758         int status;
759
760         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
761                                  info);
762         if (status < 0) {
763                 mlog_errno(status);
764                 return -1;
765         }
766
767         return 0;
768 }
769
770 /* Release info from memory */
771 static int ocfs2_local_free_info(struct super_block *sb, int type)
772 {
773         struct mem_dqinfo *info = sb_dqinfo(sb, type);
774         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
775         struct ocfs2_quota_chunk *chunk;
776         struct ocfs2_local_disk_chunk *dchunk;
777         int mark_clean = 1, len;
778         int status;
779
780         /* At this point we know there are no more dquots and thus
781          * even if there's some sync in the pdflush queue, it won't
782          * find any dquots and return without doing anything */
783         cancel_delayed_work_sync(&oinfo->dqi_sync_work);
784         iput(oinfo->dqi_gqinode);
785         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
786         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
787         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
788                 dchunk = (struct ocfs2_local_disk_chunk *)
789                                         (chunk->qc_headerbh->b_data);
790                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
791                         len = ol_chunk_entries(sb);
792                 } else {
793                         len = (oinfo->dqi_blocks -
794                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
795                               * ol_quota_entries_per_block(sb);
796                 }
797                 /* Not all entries free? Bug! */
798                 if (le32_to_cpu(dchunk->dqc_free) != len) {
799                         mlog(ML_ERROR, "releasing quota file with used "
800                                         "entries (type=%d)\n", type);
801                         mark_clean = 0;
802                 }
803         }
804         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
805
806         /* dqonoff_mutex protects us against racing with recovery thread... */
807         if (oinfo->dqi_rec) {
808                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
809                 mark_clean = 0;
810         }
811
812         if (!mark_clean)
813                 goto out;
814
815         /* Mark local file as clean */
816         info->dqi_flags |= OLQF_CLEAN;
817         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
818                                  oinfo->dqi_ibh,
819                                  olq_update_info,
820                                  info);
821         if (status < 0) {
822                 mlog_errno(status);
823                 goto out;
824         }
825
826 out:
827         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
828         brelse(oinfo->dqi_ibh);
829         brelse(oinfo->dqi_lqi_bh);
830         kfree(oinfo);
831         return 0;
832 }
833
834 static void olq_set_dquot(struct buffer_head *bh, void *private)
835 {
836         struct ocfs2_dquot *od = private;
837         struct ocfs2_local_disk_dqblk *dqblk;
838         struct super_block *sb = od->dq_dquot.dq_sb;
839
840         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
841                 + ol_dqblk_block_offset(sb, od->dq_local_off));
842
843         dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
844         spin_lock(&dq_data_lock);
845         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
846                                           od->dq_origspace);
847         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
848                                           od->dq_originodes);
849         spin_unlock(&dq_data_lock);
850         mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
851              od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
852              (long long)le64_to_cpu(dqblk->dqb_inodemod));
853 }
854
855 /* Write dquot to local quota file */
856 static int ocfs2_local_write_dquot(struct dquot *dquot)
857 {
858         struct super_block *sb = dquot->dq_sb;
859         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
860         struct buffer_head *bh = NULL;
861         int status;
862
863         status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
864                                     ol_dqblk_file_block(sb, od->dq_local_off),
865                                     &bh);
866         if (status) {
867                 mlog_errno(status);
868                 goto out;
869         }
870         status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
871                                  olq_set_dquot, od);
872         if (status < 0) {
873                 mlog_errno(status);
874                 goto out;
875         }
876 out:
877         brelse(bh);
878         return status;
879 }
880
881 /* Find free entry in local quota file */
882 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
883                                                        int type,
884                                                        int *offset)
885 {
886         struct mem_dqinfo *info = sb_dqinfo(sb, type);
887         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
888         struct ocfs2_quota_chunk *chunk;
889         struct ocfs2_local_disk_chunk *dchunk;
890         int found = 0, len;
891
892         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
893                 dchunk = (struct ocfs2_local_disk_chunk *)
894                                                 chunk->qc_headerbh->b_data;
895                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
896                         found = 1;
897                         break;
898                 }
899         }
900         if (!found)
901                 return NULL;
902
903         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
904                 len = ol_chunk_entries(sb);
905         } else {
906                 len = (oinfo->dqi_blocks -
907                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
908                       * ol_quota_entries_per_block(sb);
909         }
910
911         found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
912         /* We failed? */
913         if (found == len) {
914                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
915                      " entries free (type=%d)\n", chunk->qc_num,
916                      le32_to_cpu(dchunk->dqc_free), type);
917                 return ERR_PTR(-EIO);
918         }
919         *offset = found;
920         return chunk;
921 }
922
923 /* Add new chunk to the local quota file */
924 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
925                                                         struct super_block *sb,
926                                                         int type,
927                                                         int *offset)
928 {
929         struct mem_dqinfo *info = sb_dqinfo(sb, type);
930         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
931         struct inode *lqinode = sb_dqopt(sb)->files[type];
932         struct ocfs2_quota_chunk *chunk = NULL;
933         struct ocfs2_local_disk_chunk *dchunk;
934         int status;
935         handle_t *handle;
936         struct buffer_head *bh = NULL;
937         u64 p_blkno;
938
939         /* We are protected by dqio_sem so no locking needed */
940         status = ocfs2_extend_no_holes(lqinode,
941                                        lqinode->i_size + 2 * sb->s_blocksize,
942                                        lqinode->i_size);
943         if (status < 0) {
944                 mlog_errno(status);
945                 goto out;
946         }
947         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
948                                           lqinode->i_size + 2 * sb->s_blocksize);
949         if (status < 0) {
950                 mlog_errno(status);
951                 goto out;
952         }
953
954         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
955         if (!chunk) {
956                 status = -ENOMEM;
957                 mlog_errno(status);
958                 goto out;
959         }
960
961         down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
962         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
963                                              &p_blkno, NULL, NULL);
964         up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
965         if (status < 0) {
966                 mlog_errno(status);
967                 goto out;
968         }
969         bh = sb_getblk(sb, p_blkno);
970         if (!bh) {
971                 status = -ENOMEM;
972                 mlog_errno(status);
973                 goto out;
974         }
975         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
976
977         handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
978         if (IS_ERR(handle)) {
979                 status = PTR_ERR(handle);
980                 mlog_errno(status);
981                 goto out;
982         }
983
984         status = ocfs2_journal_access_dq(handle, lqinode, bh,
985                                          OCFS2_JOURNAL_ACCESS_WRITE);
986         if (status < 0) {
987                 mlog_errno(status);
988                 goto out_trans;
989         }
990         lock_buffer(bh);
991         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
992         memset(dchunk->dqc_bitmap, 0,
993                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
994                OCFS2_QBLK_RESERVED_SPACE);
995         set_buffer_uptodate(bh);
996         unlock_buffer(bh);
997         status = ocfs2_journal_dirty(handle, bh);
998         if (status < 0) {
999                 mlog_errno(status);
1000                 goto out_trans;
1001         }
1002
1003         oinfo->dqi_blocks += 2;
1004         oinfo->dqi_chunks++;
1005         status = ocfs2_local_write_info(sb, type);
1006         if (status < 0) {
1007                 mlog_errno(status);
1008                 goto out_trans;
1009         }
1010         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1011         if (status < 0) {
1012                 mlog_errno(status);
1013                 goto out;
1014         }
1015
1016         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1017         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1018                                    struct ocfs2_quota_chunk,
1019                                    qc_chunk)->qc_num + 1;
1020         chunk->qc_headerbh = bh;
1021         *offset = 0;
1022         return chunk;
1023 out_trans:
1024         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1025 out:
1026         brelse(bh);
1027         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1028         return ERR_PTR(status);
1029 }
1030
1031 /* Find free entry in local quota file */
1032 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1033                                                        struct super_block *sb,
1034                                                        int type,
1035                                                        int *offset)
1036 {
1037         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1038         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1039         struct ocfs2_quota_chunk *chunk;
1040         struct inode *lqinode = sb_dqopt(sb)->files[type];
1041         struct ocfs2_local_disk_chunk *dchunk;
1042         int epb = ol_quota_entries_per_block(sb);
1043         unsigned int chunk_blocks;
1044         int status;
1045         handle_t *handle;
1046
1047         if (list_empty(&oinfo->dqi_chunk))
1048                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1049         /* Is the last chunk full? */
1050         chunk = list_entry(oinfo->dqi_chunk.prev,
1051                         struct ocfs2_quota_chunk, qc_chunk);
1052         chunk_blocks = oinfo->dqi_blocks -
1053                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1054         if (ol_chunk_blocks(sb) == chunk_blocks)
1055                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1056
1057         /* We are protected by dqio_sem so no locking needed */
1058         status = ocfs2_extend_no_holes(lqinode,
1059                                        lqinode->i_size + sb->s_blocksize,
1060                                        lqinode->i_size);
1061         if (status < 0) {
1062                 mlog_errno(status);
1063                 goto out;
1064         }
1065         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1066                                           lqinode->i_size + sb->s_blocksize);
1067         if (status < 0) {
1068                 mlog_errno(status);
1069                 goto out;
1070         }
1071         handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
1072         if (IS_ERR(handle)) {
1073                 status = PTR_ERR(handle);
1074                 mlog_errno(status);
1075                 goto out;
1076         }
1077         status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh,
1078                                  OCFS2_JOURNAL_ACCESS_WRITE);
1079         if (status < 0) {
1080                 mlog_errno(status);
1081                 goto out_trans;
1082         }
1083
1084         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1085         lock_buffer(chunk->qc_headerbh);
1086         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1087         unlock_buffer(chunk->qc_headerbh);
1088         status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1089         if (status < 0) {
1090                 mlog_errno(status);
1091                 goto out_trans;
1092         }
1093         oinfo->dqi_blocks++;
1094         status = ocfs2_local_write_info(sb, type);
1095         if (status < 0) {
1096                 mlog_errno(status);
1097                 goto out_trans;
1098         }
1099
1100         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1101         if (status < 0) {
1102                 mlog_errno(status);
1103                 goto out;
1104         }
1105         *offset = chunk_blocks * epb;
1106         return chunk;
1107 out_trans:
1108         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1109 out:
1110         return ERR_PTR(status);
1111 }
1112
1113 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1114 {
1115         int *offset = private;
1116         struct ocfs2_local_disk_chunk *dchunk;
1117
1118         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1119         ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1120         le32_add_cpu(&dchunk->dqc_free, -1);
1121 }
1122
1123 /* Create dquot in the local file for given id */
1124 static int ocfs2_create_local_dquot(struct dquot *dquot)
1125 {
1126         struct super_block *sb = dquot->dq_sb;
1127         int type = dquot->dq_type;
1128         struct inode *lqinode = sb_dqopt(sb)->files[type];
1129         struct ocfs2_quota_chunk *chunk;
1130         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1131         int offset;
1132         int status;
1133
1134         chunk = ocfs2_find_free_entry(sb, type, &offset);
1135         if (!chunk) {
1136                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1137                 if (IS_ERR(chunk))
1138                         return PTR_ERR(chunk);
1139         } else if (IS_ERR(chunk)) {
1140                 return PTR_ERR(chunk);
1141         }
1142         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1143         od->dq_chunk = chunk;
1144
1145         /* Initialize dquot structure on disk */
1146         status = ocfs2_local_write_dquot(dquot);
1147         if (status < 0) {
1148                 mlog_errno(status);
1149                 goto out;
1150         }
1151
1152         /* Mark structure as allocated */
1153         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1154                                  &offset);
1155         if (status < 0) {
1156                 mlog_errno(status);
1157                 goto out;
1158         }
1159 out:
1160         return status;
1161 }
1162
1163 /* Create entry in local file for dquot, load data from the global file */
1164 static int ocfs2_local_read_dquot(struct dquot *dquot)
1165 {
1166         int status;
1167
1168         mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
1169
1170         status = ocfs2_global_read_dquot(dquot);
1171         if (status < 0) {
1172                 mlog_errno(status);
1173                 goto out_err;
1174         }
1175
1176         /* Now create entry in the local quota file */
1177         status = ocfs2_create_local_dquot(dquot);
1178         if (status < 0) {
1179                 mlog_errno(status);
1180                 goto out_err;
1181         }
1182         mlog_exit(0);
1183         return 0;
1184 out_err:
1185         mlog_exit(status);
1186         return status;
1187 }
1188
1189 /* Release dquot structure from local quota file. ocfs2_release_dquot() has
1190  * already started a transaction and obtained exclusive lock for global
1191  * quota file. */
1192 static int ocfs2_local_release_dquot(struct dquot *dquot)
1193 {
1194         int status;
1195         int type = dquot->dq_type;
1196         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1197         struct super_block *sb = dquot->dq_sb;
1198         struct ocfs2_local_disk_chunk *dchunk;
1199         int offset;
1200         handle_t *handle = journal_current_handle();
1201
1202         BUG_ON(!handle);
1203         /* First write all local changes to global file */
1204         status = ocfs2_global_release_dquot(dquot);
1205         if (status < 0) {
1206                 mlog_errno(status);
1207                 goto out;
1208         }
1209
1210         status = ocfs2_journal_access_dq(handle, sb_dqopt(sb)->files[type],
1211                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1212         if (status < 0) {
1213                 mlog_errno(status);
1214                 goto out;
1215         }
1216         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1217                                              od->dq_local_off);
1218         dchunk = (struct ocfs2_local_disk_chunk *)
1219                         (od->dq_chunk->qc_headerbh->b_data);
1220         /* Mark structure as freed */
1221         lock_buffer(od->dq_chunk->qc_headerbh);
1222         ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1223         le32_add_cpu(&dchunk->dqc_free, 1);
1224         unlock_buffer(od->dq_chunk->qc_headerbh);
1225         status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1226         if (status < 0) {
1227                 mlog_errno(status);
1228                 goto out;
1229         }
1230         status = 0;
1231 out:
1232         /* Clear the read bit so that next time someone uses this
1233          * dquot he reads fresh info from disk and allocates local
1234          * dquot structure */
1235         clear_bit(DQ_READ_B, &dquot->dq_flags);
1236         return status;
1237 }
1238
1239 static struct quota_format_ops ocfs2_format_ops = {
1240         .check_quota_file       = ocfs2_local_check_quota_file,
1241         .read_file_info         = ocfs2_local_read_info,
1242         .write_file_info        = ocfs2_global_write_info,
1243         .free_file_info         = ocfs2_local_free_info,
1244         .read_dqblk             = ocfs2_local_read_dquot,
1245         .commit_dqblk           = ocfs2_local_write_dquot,
1246         .release_dqblk          = ocfs2_local_release_dquot,
1247 };
1248
1249 struct quota_format_type ocfs2_quota_format = {
1250         .qf_fmt_id = QFMT_OCFS2,
1251         .qf_ops = &ocfs2_format_ops,
1252         .qf_owner = THIS_MODULE
1253 };