quota: Push dqio_sem down to ->read_file_info()
[sfrench/cifs-2.6.git] / fs / ocfs2 / quota_local.c
1 /*
2  *  Implementation of operations over local quota file
3  */
4
5 #include <linux/fs.h>
6 #include <linux/slab.h>
7 #include <linux/quota.h>
8 #include <linux/quotaops.h>
9 #include <linux/module.h>
10
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 #include "uptodate.h"
24 #include "super.h"
25 #include "ocfs2_trace.h"
26
27 /* Number of local quota structures per block */
28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
29 {
30         return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
31                 sizeof(struct ocfs2_local_disk_dqblk));
32 }
33
34 /* Number of blocks with entries in one chunk */
35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
36 {
37         return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
38                  OCFS2_QBLK_RESERVED_SPACE) << 3) /
39                ol_quota_entries_per_block(sb);
40 }
41
42 /* Number of entries in a chunk bitmap */
43 static unsigned int ol_chunk_entries(struct super_block *sb)
44 {
45         return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
46 }
47
48 /* Offset of the chunk in quota file */
49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
50 {
51         /* 1 block for local quota file info, 1 block per chunk for chunk info */
52         return 1 + (ol_chunk_blocks(sb) + 1) * c;
53 }
54
55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
56 {
57         int epb = ol_quota_entries_per_block(sb);
58
59         return ol_quota_chunk_block(sb, c) + 1 + off / epb;
60 }
61
62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
63 {
64         int epb = ol_quota_entries_per_block(sb);
65
66         return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
67 }
68
69 /* Offset of the dquot structure in the quota file */
70 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
71 {
72         return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
73                ol_dqblk_block_off(sb, c, off);
74 }
75
76 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
77 {
78         return off & ((1 << sb->s_blocksize_bits) - 1);
79 }
80
81 /* Compute offset in the chunk of a structure with the given offset */
82 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
83 {
84         int epb = ol_quota_entries_per_block(sb);
85
86         return ((off >> sb->s_blocksize_bits) -
87                         ol_quota_chunk_block(sb, c) - 1) * epb
88                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
89                  sizeof(struct ocfs2_local_disk_dqblk);
90 }
91
92 /* Write bufferhead into the fs */
93 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
94                 void (*modify)(struct buffer_head *, void *), void *private)
95 {
96         struct super_block *sb = inode->i_sb;
97         handle_t *handle;
98         int status;
99
100         handle = ocfs2_start_trans(OCFS2_SB(sb),
101                                    OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
102         if (IS_ERR(handle)) {
103                 status = PTR_ERR(handle);
104                 mlog_errno(status);
105                 return status;
106         }
107         status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
108                                          OCFS2_JOURNAL_ACCESS_WRITE);
109         if (status < 0) {
110                 mlog_errno(status);
111                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
112                 return status;
113         }
114         lock_buffer(bh);
115         modify(bh, private);
116         unlock_buffer(bh);
117         ocfs2_journal_dirty(handle, bh);
118
119         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
120         if (status < 0) {
121                 mlog_errno(status);
122                 return status;
123         }
124         return 0;
125 }
126
127 /*
128  * Read quota block from a given logical offset.
129  *
130  * This function acquires ip_alloc_sem and thus it must not be called with a
131  * transaction started.
132  */
133 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
134                                   struct buffer_head **bh)
135 {
136         int rc = 0;
137         struct buffer_head *tmp = *bh;
138
139         if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
140                 ocfs2_error(inode->i_sb,
141                             "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
142                             (unsigned long long)OCFS2_I(inode)->ip_blkno,
143                             (unsigned long long)v_block,
144                             (unsigned long long)i_size_read(inode));
145                 return -EIO;
146         }
147         rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
148                                     ocfs2_validate_quota_block);
149         if (rc)
150                 mlog_errno(rc);
151
152         /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
153         if (!rc && !*bh)
154                 *bh = tmp;
155
156         return rc;
157 }
158
159 /* Check whether we understand format of quota files */
160 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
161 {
162         unsigned int lmagics[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
163         unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
164         unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
165         unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
166         unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
167                                               GROUP_QUOTA_SYSTEM_INODE };
168         struct buffer_head *bh = NULL;
169         struct inode *linode = sb_dqopt(sb)->files[type];
170         struct inode *ginode = NULL;
171         struct ocfs2_disk_dqheader *dqhead;
172         int status, ret = 0;
173
174         /* First check whether we understand local quota file */
175         status = ocfs2_read_quota_block(linode, 0, &bh);
176         if (status) {
177                 mlog_errno(status);
178                 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
179                         type);
180                 goto out_err;
181         }
182         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
183         if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
184                 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
185                         " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
186                         lmagics[type], type);
187                 goto out_err;
188         }
189         if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
190                 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
191                         " type=%d\n", le32_to_cpu(dqhead->dqh_version),
192                         lversions[type], type);
193                 goto out_err;
194         }
195         brelse(bh);
196         bh = NULL;
197
198         /* Next check whether we understand global quota file */
199         ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
200                                                 OCFS2_INVALID_SLOT);
201         if (!ginode) {
202                 mlog(ML_ERROR, "cannot get global quota file inode "
203                                 "(type=%d)\n", type);
204                 goto out_err;
205         }
206         /* Since the header is read only, we don't care about locking */
207         status = ocfs2_read_quota_block(ginode, 0, &bh);
208         if (status) {
209                 mlog_errno(status);
210                 mlog(ML_ERROR, "failed to read global quota file header "
211                                 "(type=%d)\n", type);
212                 goto out_err;
213         }
214         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
215         if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
216                 mlog(ML_ERROR, "global quota file magic does not match "
217                         "(%u != %u), type=%d\n",
218                         le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
219                 goto out_err;
220         }
221         if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
222                 mlog(ML_ERROR, "global quota file version does not match "
223                         "(%u != %u), type=%d\n",
224                         le32_to_cpu(dqhead->dqh_version), gversions[type],
225                         type);
226                 goto out_err;
227         }
228
229         ret = 1;
230 out_err:
231         brelse(bh);
232         iput(ginode);
233         return ret;
234 }
235
236 /* Release given list of quota file chunks */
237 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
238 {
239         struct ocfs2_quota_chunk *pos, *next;
240
241         list_for_each_entry_safe(pos, next, head, qc_chunk) {
242                 list_del(&pos->qc_chunk);
243                 brelse(pos->qc_headerbh);
244                 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
245         }
246 }
247
248 /* Load quota bitmaps into memory */
249 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
250                         struct ocfs2_local_disk_dqinfo *ldinfo,
251                         struct list_head *head)
252 {
253         struct ocfs2_quota_chunk *newchunk;
254         int i, status;
255
256         INIT_LIST_HEAD(head);
257         for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
258                 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
259                 if (!newchunk) {
260                         ocfs2_release_local_quota_bitmaps(head);
261                         return -ENOMEM;
262                 }
263                 newchunk->qc_num = i;
264                 newchunk->qc_headerbh = NULL;
265                 status = ocfs2_read_quota_block(inode,
266                                 ol_quota_chunk_block(inode->i_sb, i),
267                                 &newchunk->qc_headerbh);
268                 if (status) {
269                         mlog_errno(status);
270                         kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
271                         ocfs2_release_local_quota_bitmaps(head);
272                         return status;
273                 }
274                 list_add_tail(&newchunk->qc_chunk, head);
275         }
276         return 0;
277 }
278
279 static void olq_update_info(struct buffer_head *bh, void *private)
280 {
281         struct mem_dqinfo *info = private;
282         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
283         struct ocfs2_local_disk_dqinfo *ldinfo;
284
285         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
286                                                 OCFS2_LOCAL_INFO_OFF);
287         spin_lock(&dq_data_lock);
288         ldinfo->dqi_flags = cpu_to_le32(oinfo->dqi_flags);
289         ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
290         ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
291         spin_unlock(&dq_data_lock);
292 }
293
294 static int ocfs2_add_recovery_chunk(struct super_block *sb,
295                                     struct ocfs2_local_disk_chunk *dchunk,
296                                     int chunk,
297                                     struct list_head *head)
298 {
299         struct ocfs2_recovery_chunk *rc;
300
301         rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
302         if (!rc)
303                 return -ENOMEM;
304         rc->rc_chunk = chunk;
305         rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
306         if (!rc->rc_bitmap) {
307                 kfree(rc);
308                 return -ENOMEM;
309         }
310         memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
311                (ol_chunk_entries(sb) + 7) >> 3);
312         list_add_tail(&rc->rc_list, head);
313         return 0;
314 }
315
316 static void free_recovery_list(struct list_head *head)
317 {
318         struct ocfs2_recovery_chunk *next;
319         struct ocfs2_recovery_chunk *rchunk;
320
321         list_for_each_entry_safe(rchunk, next, head, rc_list) {
322                 list_del(&rchunk->rc_list);
323                 kfree(rchunk->rc_bitmap);
324                 kfree(rchunk);
325         }
326 }
327
328 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
329 {
330         int type;
331
332         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
333                 free_recovery_list(&(rec->r_list[type]));
334         kfree(rec);
335 }
336
337 /* Load entries in our quota file we have to recover*/
338 static int ocfs2_recovery_load_quota(struct inode *lqinode,
339                                      struct ocfs2_local_disk_dqinfo *ldinfo,
340                                      int type,
341                                      struct list_head *head)
342 {
343         struct super_block *sb = lqinode->i_sb;
344         struct buffer_head *hbh;
345         struct ocfs2_local_disk_chunk *dchunk;
346         int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
347         int status = 0;
348
349         for (i = 0; i < chunks; i++) {
350                 hbh = NULL;
351                 status = ocfs2_read_quota_block(lqinode,
352                                                 ol_quota_chunk_block(sb, i),
353                                                 &hbh);
354                 if (status) {
355                         mlog_errno(status);
356                         break;
357                 }
358                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
359                 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
360                         status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
361                 brelse(hbh);
362                 if (status < 0)
363                         break;
364         }
365         if (status < 0)
366                 free_recovery_list(head);
367         return status;
368 }
369
370 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
371 {
372         int type;
373         struct ocfs2_quota_recovery *rec;
374
375         rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
376         if (!rec)
377                 return NULL;
378         for (type = 0; type < OCFS2_MAXQUOTAS; type++)
379                 INIT_LIST_HEAD(&(rec->r_list[type]));
380         return rec;
381 }
382
383 /* Load information we need for quota recovery into memory */
384 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
385                                                 struct ocfs2_super *osb,
386                                                 int slot_num)
387 {
388         unsigned int feature[OCFS2_MAXQUOTAS] = {
389                                         OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
390                                         OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
391         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
392                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
393         struct super_block *sb = osb->sb;
394         struct ocfs2_local_disk_dqinfo *ldinfo;
395         struct inode *lqinode;
396         struct buffer_head *bh;
397         int type;
398         int status = 0;
399         struct ocfs2_quota_recovery *rec;
400
401         printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
402                "slot %u\n", osb->dev_str, slot_num);
403
404         rec = ocfs2_alloc_quota_recovery();
405         if (!rec)
406                 return ERR_PTR(-ENOMEM);
407         /* First init... */
408
409         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
410                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
411                         continue;
412                 /* At this point, journal of the slot is already replayed so
413                  * we can trust metadata and data of the quota file */
414                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
415                 if (!lqinode) {
416                         status = -ENOENT;
417                         goto out;
418                 }
419                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
420                                                OCFS2_META_LOCK_RECOVERY);
421                 if (status < 0) {
422                         mlog_errno(status);
423                         goto out_put;
424                 }
425                 /* Now read local header */
426                 bh = NULL;
427                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
428                 if (status) {
429                         mlog_errno(status);
430                         mlog(ML_ERROR, "failed to read quota file info header "
431                                 "(slot=%d type=%d)\n", slot_num, type);
432                         goto out_lock;
433                 }
434                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
435                                                         OCFS2_LOCAL_INFO_OFF);
436                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
437                                                    &rec->r_list[type]);
438                 brelse(bh);
439 out_lock:
440                 ocfs2_inode_unlock(lqinode, 1);
441 out_put:
442                 iput(lqinode);
443                 if (status < 0)
444                         break;
445         }
446 out:
447         if (status < 0) {
448                 ocfs2_free_quota_recovery(rec);
449                 rec = ERR_PTR(status);
450         }
451         return rec;
452 }
453
454 /* Sync changes in local quota file into global quota file and
455  * reinitialize local quota file.
456  * The function expects local quota file to be already locked and
457  * s_umount locked in shared mode. */
458 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
459                                           int type,
460                                           struct ocfs2_quota_recovery *rec)
461 {
462         struct super_block *sb = lqinode->i_sb;
463         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
464         struct ocfs2_local_disk_chunk *dchunk;
465         struct ocfs2_local_disk_dqblk *dqblk;
466         struct dquot *dquot;
467         handle_t *handle;
468         struct buffer_head *hbh = NULL, *qbh = NULL;
469         int status = 0;
470         int bit, chunk;
471         struct ocfs2_recovery_chunk *rchunk, *next;
472         qsize_t spacechange, inodechange;
473
474         trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
475
476         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
477                 chunk = rchunk->rc_chunk;
478                 hbh = NULL;
479                 status = ocfs2_read_quota_block(lqinode,
480                                                 ol_quota_chunk_block(sb, chunk),
481                                                 &hbh);
482                 if (status) {
483                         mlog_errno(status);
484                         break;
485                 }
486                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
487                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
488                         qbh = NULL;
489                         status = ocfs2_read_quota_block(lqinode,
490                                                 ol_dqblk_block(sb, chunk, bit),
491                                                 &qbh);
492                         if (status) {
493                                 mlog_errno(status);
494                                 break;
495                         }
496                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
497                                 ol_dqblk_block_off(sb, chunk, bit));
498                         dquot = dqget(sb,
499                                       make_kqid(&init_user_ns, type,
500                                                 le64_to_cpu(dqblk->dqb_id)));
501                         if (IS_ERR(dquot)) {
502                                 status = PTR_ERR(dquot);
503                                 mlog(ML_ERROR, "Failed to get quota structure "
504                                      "for id %u, type %d. Cannot finish quota "
505                                      "file recovery.\n",
506                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
507                                      type);
508                                 goto out_put_bh;
509                         }
510                         status = ocfs2_lock_global_qf(oinfo, 1);
511                         if (status < 0) {
512                                 mlog_errno(status);
513                                 goto out_put_dquot;
514                         }
515
516                         handle = ocfs2_start_trans(OCFS2_SB(sb),
517                                                    OCFS2_QSYNC_CREDITS);
518                         if (IS_ERR(handle)) {
519                                 status = PTR_ERR(handle);
520                                 mlog_errno(status);
521                                 goto out_drop_lock;
522                         }
523                         down_write(&sb_dqopt(sb)->dqio_sem);
524                         spin_lock(&dq_data_lock);
525                         /* Add usage from quota entry into quota changes
526                          * of our node. Auxiliary variables are important
527                          * due to signedness */
528                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
529                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
530                         dquot->dq_dqb.dqb_curspace += spacechange;
531                         dquot->dq_dqb.dqb_curinodes += inodechange;
532                         spin_unlock(&dq_data_lock);
533                         /* We want to drop reference held by the crashed
534                          * node. Since we have our own reference we know
535                          * global structure actually won't be freed. */
536                         status = ocfs2_global_release_dquot(dquot);
537                         if (status < 0) {
538                                 mlog_errno(status);
539                                 goto out_commit;
540                         }
541                         /* Release local quota file entry */
542                         status = ocfs2_journal_access_dq(handle,
543                                         INODE_CACHE(lqinode),
544                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
545                         if (status < 0) {
546                                 mlog_errno(status);
547                                 goto out_commit;
548                         }
549                         lock_buffer(qbh);
550                         WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
551                         ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
552                         le32_add_cpu(&dchunk->dqc_free, 1);
553                         unlock_buffer(qbh);
554                         ocfs2_journal_dirty(handle, qbh);
555 out_commit:
556                         up_write(&sb_dqopt(sb)->dqio_sem);
557                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
558 out_drop_lock:
559                         ocfs2_unlock_global_qf(oinfo, 1);
560 out_put_dquot:
561                         dqput(dquot);
562 out_put_bh:
563                         brelse(qbh);
564                         if (status < 0)
565                                 break;
566                 }
567                 brelse(hbh);
568                 list_del(&rchunk->rc_list);
569                 kfree(rchunk->rc_bitmap);
570                 kfree(rchunk);
571                 if (status < 0)
572                         break;
573         }
574         if (status < 0)
575                 free_recovery_list(&(rec->r_list[type]));
576         if (status)
577                 mlog_errno(status);
578         return status;
579 }
580
581 /* Recover local quota files for given node different from us */
582 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
583                                 struct ocfs2_quota_recovery *rec,
584                                 int slot_num)
585 {
586         unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
587                                               LOCAL_GROUP_QUOTA_SYSTEM_INODE };
588         struct super_block *sb = osb->sb;
589         struct ocfs2_local_disk_dqinfo *ldinfo;
590         struct buffer_head *bh;
591         handle_t *handle;
592         int type;
593         int status = 0;
594         struct inode *lqinode;
595         unsigned int flags;
596
597         printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
598                "slot %u\n", osb->dev_str, slot_num);
599
600         down_read(&sb->s_umount);
601         for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
602                 if (list_empty(&(rec->r_list[type])))
603                         continue;
604                 trace_ocfs2_finish_quota_recovery(slot_num);
605                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
606                 if (!lqinode) {
607                         status = -ENOENT;
608                         goto out;
609                 }
610                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
611                                                        OCFS2_META_LOCK_NOQUEUE);
612                 /* Someone else is holding the lock? Then he must be
613                  * doing the recovery. Just skip the file... */
614                 if (status == -EAGAIN) {
615                         printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
616                                "device (%s) for slot %d because quota file is "
617                                "locked.\n", osb->dev_str, slot_num);
618                         status = 0;
619                         goto out_put;
620                 } else if (status < 0) {
621                         mlog_errno(status);
622                         goto out_put;
623                 }
624                 /* Now read local header */
625                 bh = NULL;
626                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
627                 if (status) {
628                         mlog_errno(status);
629                         mlog(ML_ERROR, "failed to read quota file info header "
630                                 "(slot=%d type=%d)\n", slot_num, type);
631                         goto out_lock;
632                 }
633                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
634                                                         OCFS2_LOCAL_INFO_OFF);
635                 /* Is recovery still needed? */
636                 flags = le32_to_cpu(ldinfo->dqi_flags);
637                 if (!(flags & OLQF_CLEAN))
638                         status = ocfs2_recover_local_quota_file(lqinode,
639                                                                 type,
640                                                                 rec);
641                 /* We don't want to mark file as clean when it is actually
642                  * active */
643                 if (slot_num == osb->slot_num)
644                         goto out_bh;
645                 /* Mark quota file as clean if we are recovering quota file of
646                  * some other node. */
647                 handle = ocfs2_start_trans(osb,
648                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
649                 if (IS_ERR(handle)) {
650                         status = PTR_ERR(handle);
651                         mlog_errno(status);
652                         goto out_bh;
653                 }
654                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
655                                                  bh,
656                                                  OCFS2_JOURNAL_ACCESS_WRITE);
657                 if (status < 0) {
658                         mlog_errno(status);
659                         goto out_trans;
660                 }
661                 lock_buffer(bh);
662                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
663                 unlock_buffer(bh);
664                 ocfs2_journal_dirty(handle, bh);
665 out_trans:
666                 ocfs2_commit_trans(osb, handle);
667 out_bh:
668                 brelse(bh);
669 out_lock:
670                 ocfs2_inode_unlock(lqinode, 1);
671 out_put:
672                 iput(lqinode);
673                 if (status < 0)
674                         break;
675         }
676 out:
677         up_read(&sb->s_umount);
678         kfree(rec);
679         return status;
680 }
681
682 /* Read information header from quota file */
683 static int ocfs2_local_read_info(struct super_block *sb, int type)
684 {
685         struct ocfs2_local_disk_dqinfo *ldinfo;
686         struct mem_dqinfo *info = sb_dqinfo(sb, type);
687         struct ocfs2_mem_dqinfo *oinfo;
688         struct inode *lqinode = sb_dqopt(sb)->files[type];
689         int status;
690         struct buffer_head *bh = NULL;
691         struct ocfs2_quota_recovery *rec;
692         int locked = 0;
693
694         info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
695         info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
696         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
697         if (!oinfo) {
698                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
699                                " info.");
700                 goto out_err;
701         }
702         info->dqi_priv = oinfo;
703         oinfo->dqi_type = type;
704         INIT_LIST_HEAD(&oinfo->dqi_chunk);
705         oinfo->dqi_rec = NULL;
706         oinfo->dqi_lqi_bh = NULL;
707         oinfo->dqi_libh = NULL;
708
709         status = ocfs2_global_read_info(sb, type);
710         if (status < 0)
711                 goto out_err;
712
713         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
714         if (status < 0) {
715                 mlog_errno(status);
716                 goto out_err;
717         }
718         locked = 1;
719
720         /* Now read local header */
721         status = ocfs2_read_quota_block(lqinode, 0, &bh);
722         if (status) {
723                 mlog_errno(status);
724                 mlog(ML_ERROR, "failed to read quota file info header "
725                         "(type=%d)\n", type);
726                 goto out_err;
727         }
728         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
729                                                 OCFS2_LOCAL_INFO_OFF);
730         oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
731         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
732         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
733         oinfo->dqi_libh = bh;
734
735         /* We crashed when using local quota file? */
736         if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
737                 rec = OCFS2_SB(sb)->quota_rec;
738                 if (!rec) {
739                         rec = ocfs2_alloc_quota_recovery();
740                         if (!rec) {
741                                 status = -ENOMEM;
742                                 mlog_errno(status);
743                                 goto out_err;
744                         }
745                         OCFS2_SB(sb)->quota_rec = rec;
746                 }
747
748                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
749                                                    &rec->r_list[type]);
750                 if (status < 0) {
751                         mlog_errno(status);
752                         goto out_err;
753                 }
754         }
755
756         status = ocfs2_load_local_quota_bitmaps(lqinode,
757                                                 ldinfo,
758                                                 &oinfo->dqi_chunk);
759         if (status < 0) {
760                 mlog_errno(status);
761                 goto out_err;
762         }
763
764         /* Now mark quota file as used */
765         oinfo->dqi_flags &= ~OLQF_CLEAN;
766         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
767         if (status < 0) {
768                 mlog_errno(status);
769                 goto out_err;
770         }
771
772         return 0;
773 out_err:
774         if (oinfo) {
775                 iput(oinfo->dqi_gqinode);
776                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
777                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
778                 brelse(oinfo->dqi_lqi_bh);
779                 if (locked)
780                         ocfs2_inode_unlock(lqinode, 1);
781                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
782                 kfree(oinfo);
783         }
784         brelse(bh);
785         return -1;
786 }
787
788 /* Write local info to quota file */
789 static int ocfs2_local_write_info(struct super_block *sb, int type)
790 {
791         struct mem_dqinfo *info = sb_dqinfo(sb, type);
792         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
793                                                 ->dqi_libh;
794         int status;
795
796         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
797                                  info);
798         if (status < 0) {
799                 mlog_errno(status);
800                 return -1;
801         }
802
803         return 0;
804 }
805
806 /* Release info from memory */
807 static int ocfs2_local_free_info(struct super_block *sb, int type)
808 {
809         struct mem_dqinfo *info = sb_dqinfo(sb, type);
810         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
811         struct ocfs2_quota_chunk *chunk;
812         struct ocfs2_local_disk_chunk *dchunk;
813         int mark_clean = 1, len;
814         int status;
815
816         iput(oinfo->dqi_gqinode);
817         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
818         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
819         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
820                 dchunk = (struct ocfs2_local_disk_chunk *)
821                                         (chunk->qc_headerbh->b_data);
822                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
823                         len = ol_chunk_entries(sb);
824                 } else {
825                         len = (oinfo->dqi_blocks -
826                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
827                               * ol_quota_entries_per_block(sb);
828                 }
829                 /* Not all entries free? Bug! */
830                 if (le32_to_cpu(dchunk->dqc_free) != len) {
831                         mlog(ML_ERROR, "releasing quota file with used "
832                                         "entries (type=%d)\n", type);
833                         mark_clean = 0;
834                 }
835         }
836         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
837
838         /*
839          * s_umount held in exclusive mode protects us against racing with
840          * recovery thread...
841          */
842         if (oinfo->dqi_rec) {
843                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
844                 mark_clean = 0;
845         }
846
847         if (!mark_clean)
848                 goto out;
849
850         /* Mark local file as clean */
851         oinfo->dqi_flags |= OLQF_CLEAN;
852         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
853                                  oinfo->dqi_libh,
854                                  olq_update_info,
855                                  info);
856         if (status < 0) {
857                 mlog_errno(status);
858                 goto out;
859         }
860
861 out:
862         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
863         brelse(oinfo->dqi_libh);
864         brelse(oinfo->dqi_lqi_bh);
865         kfree(oinfo);
866         return 0;
867 }
868
869 static void olq_set_dquot(struct buffer_head *bh, void *private)
870 {
871         struct ocfs2_dquot *od = private;
872         struct ocfs2_local_disk_dqblk *dqblk;
873         struct super_block *sb = od->dq_dquot.dq_sb;
874
875         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
876                 + ol_dqblk_block_offset(sb, od->dq_local_off));
877
878         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
879                                               od->dq_dquot.dq_id));
880         spin_lock(&dq_data_lock);
881         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
882                                           od->dq_origspace);
883         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
884                                           od->dq_originodes);
885         spin_unlock(&dq_data_lock);
886         trace_olq_set_dquot(
887                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
888                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
889                 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
890 }
891
892 /* Write dquot to local quota file */
893 int ocfs2_local_write_dquot(struct dquot *dquot)
894 {
895         struct super_block *sb = dquot->dq_sb;
896         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
897         struct buffer_head *bh;
898         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
899         int status;
900
901         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
902                                              &bh);
903         if (status) {
904                 mlog_errno(status);
905                 goto out;
906         }
907         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
908         if (status < 0) {
909                 mlog_errno(status);
910                 goto out;
911         }
912 out:
913         brelse(bh);
914         return status;
915 }
916
917 /* Find free entry in local quota file */
918 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
919                                                        int type,
920                                                        int *offset)
921 {
922         struct mem_dqinfo *info = sb_dqinfo(sb, type);
923         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
924         struct ocfs2_quota_chunk *chunk;
925         struct ocfs2_local_disk_chunk *dchunk;
926         int found = 0, len;
927
928         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
929                 dchunk = (struct ocfs2_local_disk_chunk *)
930                                                 chunk->qc_headerbh->b_data;
931                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
932                         found = 1;
933                         break;
934                 }
935         }
936         if (!found)
937                 return NULL;
938
939         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
940                 len = ol_chunk_entries(sb);
941         } else {
942                 len = (oinfo->dqi_blocks -
943                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
944                       * ol_quota_entries_per_block(sb);
945         }
946
947         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
948         /* We failed? */
949         if (found == len) {
950                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
951                      " entries free (type=%d)\n", chunk->qc_num,
952                      le32_to_cpu(dchunk->dqc_free), type);
953                 return ERR_PTR(-EIO);
954         }
955         *offset = found;
956         return chunk;
957 }
958
959 /* Add new chunk to the local quota file */
960 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
961                                                         struct super_block *sb,
962                                                         int type,
963                                                         int *offset)
964 {
965         struct mem_dqinfo *info = sb_dqinfo(sb, type);
966         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
967         struct inode *lqinode = sb_dqopt(sb)->files[type];
968         struct ocfs2_quota_chunk *chunk = NULL;
969         struct ocfs2_local_disk_chunk *dchunk;
970         int status;
971         handle_t *handle;
972         struct buffer_head *bh = NULL, *dbh = NULL;
973         u64 p_blkno;
974
975         /* We are protected by dqio_sem so no locking needed */
976         status = ocfs2_extend_no_holes(lqinode, NULL,
977                                        i_size_read(lqinode) + 2 * sb->s_blocksize,
978                                        i_size_read(lqinode));
979         if (status < 0) {
980                 mlog_errno(status);
981                 goto out;
982         }
983         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
984                                           i_size_read(lqinode) + 2 * sb->s_blocksize);
985         if (status < 0) {
986                 mlog_errno(status);
987                 goto out;
988         }
989
990         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
991         if (!chunk) {
992                 status = -ENOMEM;
993                 mlog_errno(status);
994                 goto out;
995         }
996         /* Local quota info and two new blocks we initialize */
997         handle = ocfs2_start_trans(OCFS2_SB(sb),
998                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
999                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1000         if (IS_ERR(handle)) {
1001                 status = PTR_ERR(handle);
1002                 mlog_errno(status);
1003                 goto out;
1004         }
1005
1006         /* Initialize chunk header */
1007         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1008                                              &p_blkno, NULL, NULL);
1009         if (status < 0) {
1010                 mlog_errno(status);
1011                 goto out_trans;
1012         }
1013         bh = sb_getblk(sb, p_blkno);
1014         if (!bh) {
1015                 status = -ENOMEM;
1016                 mlog_errno(status);
1017                 goto out_trans;
1018         }
1019         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1020         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1021         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1022                                          OCFS2_JOURNAL_ACCESS_CREATE);
1023         if (status < 0) {
1024                 mlog_errno(status);
1025                 goto out_trans;
1026         }
1027         lock_buffer(bh);
1028         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1029         memset(dchunk->dqc_bitmap, 0,
1030                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1031                OCFS2_QBLK_RESERVED_SPACE);
1032         unlock_buffer(bh);
1033         ocfs2_journal_dirty(handle, bh);
1034
1035         /* Initialize new block with structures */
1036         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1037                                              &p_blkno, NULL, NULL);
1038         if (status < 0) {
1039                 mlog_errno(status);
1040                 goto out_trans;
1041         }
1042         dbh = sb_getblk(sb, p_blkno);
1043         if (!dbh) {
1044                 status = -ENOMEM;
1045                 mlog_errno(status);
1046                 goto out_trans;
1047         }
1048         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1049         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1050                                          OCFS2_JOURNAL_ACCESS_CREATE);
1051         if (status < 0) {
1052                 mlog_errno(status);
1053                 goto out_trans;
1054         }
1055         lock_buffer(dbh);
1056         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1057         unlock_buffer(dbh);
1058         ocfs2_journal_dirty(handle, dbh);
1059
1060         /* Update local quotafile info */
1061         oinfo->dqi_blocks += 2;
1062         oinfo->dqi_chunks++;
1063         status = ocfs2_local_write_info(sb, type);
1064         if (status < 0) {
1065                 mlog_errno(status);
1066                 goto out_trans;
1067         }
1068         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1069         if (status < 0) {
1070                 mlog_errno(status);
1071                 goto out;
1072         }
1073
1074         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1075         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1076                                    struct ocfs2_quota_chunk,
1077                                    qc_chunk)->qc_num + 1;
1078         chunk->qc_headerbh = bh;
1079         *offset = 0;
1080         return chunk;
1081 out_trans:
1082         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1083 out:
1084         brelse(bh);
1085         brelse(dbh);
1086         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1087         return ERR_PTR(status);
1088 }
1089
1090 /* Find free entry in local quota file */
1091 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1092                                                        struct super_block *sb,
1093                                                        int type,
1094                                                        int *offset)
1095 {
1096         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1097         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1098         struct ocfs2_quota_chunk *chunk;
1099         struct inode *lqinode = sb_dqopt(sb)->files[type];
1100         struct ocfs2_local_disk_chunk *dchunk;
1101         int epb = ol_quota_entries_per_block(sb);
1102         unsigned int chunk_blocks;
1103         struct buffer_head *bh;
1104         u64 p_blkno;
1105         int status;
1106         handle_t *handle;
1107
1108         if (list_empty(&oinfo->dqi_chunk))
1109                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1110         /* Is the last chunk full? */
1111         chunk = list_entry(oinfo->dqi_chunk.prev,
1112                         struct ocfs2_quota_chunk, qc_chunk);
1113         chunk_blocks = oinfo->dqi_blocks -
1114                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1115         if (ol_chunk_blocks(sb) == chunk_blocks)
1116                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1117
1118         /* We are protected by dqio_sem so no locking needed */
1119         status = ocfs2_extend_no_holes(lqinode, NULL,
1120                                        i_size_read(lqinode) + sb->s_blocksize,
1121                                        i_size_read(lqinode));
1122         if (status < 0) {
1123                 mlog_errno(status);
1124                 goto out;
1125         }
1126         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1127                                           i_size_read(lqinode) + sb->s_blocksize);
1128         if (status < 0) {
1129                 mlog_errno(status);
1130                 goto out;
1131         }
1132
1133         /* Get buffer from the just added block */
1134         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1135                                              &p_blkno, NULL, NULL);
1136         if (status < 0) {
1137                 mlog_errno(status);
1138                 goto out;
1139         }
1140         bh = sb_getblk(sb, p_blkno);
1141         if (!bh) {
1142                 status = -ENOMEM;
1143                 mlog_errno(status);
1144                 goto out;
1145         }
1146         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1147
1148         /* Local quota info, chunk header and the new block we initialize */
1149         handle = ocfs2_start_trans(OCFS2_SB(sb),
1150                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1151                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1152         if (IS_ERR(handle)) {
1153                 status = PTR_ERR(handle);
1154                 mlog_errno(status);
1155                 goto out;
1156         }
1157         /* Zero created block */
1158         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1159                                  OCFS2_JOURNAL_ACCESS_CREATE);
1160         if (status < 0) {
1161                 mlog_errno(status);
1162                 goto out_trans;
1163         }
1164         lock_buffer(bh);
1165         memset(bh->b_data, 0, sb->s_blocksize);
1166         unlock_buffer(bh);
1167         ocfs2_journal_dirty(handle, bh);
1168
1169         /* Update chunk header */
1170         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1171                                          chunk->qc_headerbh,
1172                                  OCFS2_JOURNAL_ACCESS_WRITE);
1173         if (status < 0) {
1174                 mlog_errno(status);
1175                 goto out_trans;
1176         }
1177
1178         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1179         lock_buffer(chunk->qc_headerbh);
1180         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1181         unlock_buffer(chunk->qc_headerbh);
1182         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1183
1184         /* Update file header */
1185         oinfo->dqi_blocks++;
1186         status = ocfs2_local_write_info(sb, type);
1187         if (status < 0) {
1188                 mlog_errno(status);
1189                 goto out_trans;
1190         }
1191
1192         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1193         if (status < 0) {
1194                 mlog_errno(status);
1195                 goto out;
1196         }
1197         *offset = chunk_blocks * epb;
1198         return chunk;
1199 out_trans:
1200         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1201 out:
1202         return ERR_PTR(status);
1203 }
1204
1205 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1206 {
1207         int *offset = private;
1208         struct ocfs2_local_disk_chunk *dchunk;
1209
1210         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1211         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1212         le32_add_cpu(&dchunk->dqc_free, -1);
1213 }
1214
1215 /* Create dquot in the local file for given id */
1216 int ocfs2_create_local_dquot(struct dquot *dquot)
1217 {
1218         struct super_block *sb = dquot->dq_sb;
1219         int type = dquot->dq_id.type;
1220         struct inode *lqinode = sb_dqopt(sb)->files[type];
1221         struct ocfs2_quota_chunk *chunk;
1222         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1223         int offset;
1224         int status;
1225         u64 pcount;
1226
1227         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1228         chunk = ocfs2_find_free_entry(sb, type, &offset);
1229         if (!chunk) {
1230                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1231                 if (IS_ERR(chunk)) {
1232                         status = PTR_ERR(chunk);
1233                         goto out;
1234                 }
1235         } else if (IS_ERR(chunk)) {
1236                 status = PTR_ERR(chunk);
1237                 goto out;
1238         }
1239         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1240         od->dq_chunk = chunk;
1241         status = ocfs2_extent_map_get_blocks(lqinode,
1242                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1243                                      &od->dq_local_phys_blk,
1244                                      &pcount,
1245                                      NULL);
1246
1247         /* Initialize dquot structure on disk */
1248         status = ocfs2_local_write_dquot(dquot);
1249         if (status < 0) {
1250                 mlog_errno(status);
1251                 goto out;
1252         }
1253
1254         /* Mark structure as allocated */
1255         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1256                                  &offset);
1257         if (status < 0) {
1258                 mlog_errno(status);
1259                 goto out;
1260         }
1261 out:
1262         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1263         return status;
1264 }
1265
1266 /*
1267  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1268  * already started a transaction and written all changes to global quota file
1269  */
1270 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1271 {
1272         int status;
1273         int type = dquot->dq_id.type;
1274         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1275         struct super_block *sb = dquot->dq_sb;
1276         struct ocfs2_local_disk_chunk *dchunk;
1277         int offset;
1278
1279         status = ocfs2_journal_access_dq(handle,
1280                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1281                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1282         if (status < 0) {
1283                 mlog_errno(status);
1284                 goto out;
1285         }
1286         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1287                                              od->dq_local_off);
1288         dchunk = (struct ocfs2_local_disk_chunk *)
1289                         (od->dq_chunk->qc_headerbh->b_data);
1290         /* Mark structure as freed */
1291         lock_buffer(od->dq_chunk->qc_headerbh);
1292         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1293         le32_add_cpu(&dchunk->dqc_free, 1);
1294         unlock_buffer(od->dq_chunk->qc_headerbh);
1295         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1296
1297 out:
1298         return status;
1299 }
1300
1301 static const struct quota_format_ops ocfs2_format_ops = {
1302         .check_quota_file       = ocfs2_local_check_quota_file,
1303         .read_file_info         = ocfs2_local_read_info,
1304         .write_file_info        = ocfs2_global_write_info,
1305         .free_file_info         = ocfs2_local_free_info,
1306 };
1307
1308 struct quota_format_type ocfs2_quota_format = {
1309         .qf_fmt_id = QFMT_OCFS2,
1310         .qf_ops = &ocfs2_format_ops,
1311         .qf_owner = THIS_MODULE
1312 };