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TOMOYO Linux Cross Reference
Linux/fs/ocfs2/quota_local.c

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  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                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
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                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
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         /* We don't need the lock and we have to acquire quota file locks
695          * which will later depend on this lock */
696         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
697         info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
698         info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
699         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
700         if (!oinfo) {
701                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
702                                " info.");
703                 goto out_err;
704         }
705         info->dqi_priv = oinfo;
706         oinfo->dqi_type = type;
707         INIT_LIST_HEAD(&oinfo->dqi_chunk);
708         oinfo->dqi_rec = NULL;
709         oinfo->dqi_lqi_bh = NULL;
710         oinfo->dqi_libh = NULL;
711 
712         status = ocfs2_global_read_info(sb, type);
713         if (status < 0)
714                 goto out_err;
715 
716         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
717         if (status < 0) {
718                 mlog_errno(status);
719                 goto out_err;
720         }
721         locked = 1;
722 
723         /* Now read local header */
724         status = ocfs2_read_quota_block(lqinode, 0, &bh);
725         if (status) {
726                 mlog_errno(status);
727                 mlog(ML_ERROR, "failed to read quota file info header "
728                         "(type=%d)\n", type);
729                 goto out_err;
730         }
731         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
732                                                 OCFS2_LOCAL_INFO_OFF);
733         oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
734         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
735         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
736         oinfo->dqi_libh = bh;
737 
738         /* We crashed when using local quota file? */
739         if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
740                 rec = OCFS2_SB(sb)->quota_rec;
741                 if (!rec) {
742                         rec = ocfs2_alloc_quota_recovery();
743                         if (!rec) {
744                                 status = -ENOMEM;
745                                 mlog_errno(status);
746                                 goto out_err;
747                         }
748                         OCFS2_SB(sb)->quota_rec = rec;
749                 }
750 
751                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
752                                                    &rec->r_list[type]);
753                 if (status < 0) {
754                         mlog_errno(status);
755                         goto out_err;
756                 }
757         }
758 
759         status = ocfs2_load_local_quota_bitmaps(lqinode,
760                                                 ldinfo,
761                                                 &oinfo->dqi_chunk);
762         if (status < 0) {
763                 mlog_errno(status);
764                 goto out_err;
765         }
766 
767         /* Now mark quota file as used */
768         oinfo->dqi_flags &= ~OLQF_CLEAN;
769         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
770         if (status < 0) {
771                 mlog_errno(status);
772                 goto out_err;
773         }
774 
775         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
776         return 0;
777 out_err:
778         if (oinfo) {
779                 iput(oinfo->dqi_gqinode);
780                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
781                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
782                 brelse(oinfo->dqi_lqi_bh);
783                 if (locked)
784                         ocfs2_inode_unlock(lqinode, 1);
785                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
786                 kfree(oinfo);
787         }
788         brelse(bh);
789         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
790         return -1;
791 }
792 
793 /* Write local info to quota file */
794 static int ocfs2_local_write_info(struct super_block *sb, int type)
795 {
796         struct mem_dqinfo *info = sb_dqinfo(sb, type);
797         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
798                                                 ->dqi_libh;
799         int status;
800 
801         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
802                                  info);
803         if (status < 0) {
804                 mlog_errno(status);
805                 return -1;
806         }
807 
808         return 0;
809 }
810 
811 /* Release info from memory */
812 static int ocfs2_local_free_info(struct super_block *sb, int type)
813 {
814         struct mem_dqinfo *info = sb_dqinfo(sb, type);
815         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
816         struct ocfs2_quota_chunk *chunk;
817         struct ocfs2_local_disk_chunk *dchunk;
818         int mark_clean = 1, len;
819         int status;
820 
821         iput(oinfo->dqi_gqinode);
822         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
823         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
824         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
825                 dchunk = (struct ocfs2_local_disk_chunk *)
826                                         (chunk->qc_headerbh->b_data);
827                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
828                         len = ol_chunk_entries(sb);
829                 } else {
830                         len = (oinfo->dqi_blocks -
831                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
832                               * ol_quota_entries_per_block(sb);
833                 }
834                 /* Not all entries free? Bug! */
835                 if (le32_to_cpu(dchunk->dqc_free) != len) {
836                         mlog(ML_ERROR, "releasing quota file with used "
837                                         "entries (type=%d)\n", type);
838                         mark_clean = 0;
839                 }
840         }
841         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
842 
843         /*
844          * s_umount held in exclusive mode protects us against racing with
845          * recovery thread...
846          */
847         if (oinfo->dqi_rec) {
848                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
849                 mark_clean = 0;
850         }
851 
852         if (!mark_clean)
853                 goto out;
854 
855         /* Mark local file as clean */
856         oinfo->dqi_flags |= OLQF_CLEAN;
857         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
858                                  oinfo->dqi_libh,
859                                  olq_update_info,
860                                  info);
861         if (status < 0) {
862                 mlog_errno(status);
863                 goto out;
864         }
865 
866 out:
867         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
868         brelse(oinfo->dqi_libh);
869         brelse(oinfo->dqi_lqi_bh);
870         kfree(oinfo);
871         return 0;
872 }
873 
874 static void olq_set_dquot(struct buffer_head *bh, void *private)
875 {
876         struct ocfs2_dquot *od = private;
877         struct ocfs2_local_disk_dqblk *dqblk;
878         struct super_block *sb = od->dq_dquot.dq_sb;
879 
880         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
881                 + ol_dqblk_block_offset(sb, od->dq_local_off));
882 
883         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
884                                               od->dq_dquot.dq_id));
885         spin_lock(&dq_data_lock);
886         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
887                                           od->dq_origspace);
888         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
889                                           od->dq_originodes);
890         spin_unlock(&dq_data_lock);
891         trace_olq_set_dquot(
892                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
893                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
894                 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
895 }
896 
897 /* Write dquot to local quota file */
898 int ocfs2_local_write_dquot(struct dquot *dquot)
899 {
900         struct super_block *sb = dquot->dq_sb;
901         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
902         struct buffer_head *bh;
903         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
904         int status;
905 
906         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
907                                              &bh);
908         if (status) {
909                 mlog_errno(status);
910                 goto out;
911         }
912         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
913         if (status < 0) {
914                 mlog_errno(status);
915                 goto out;
916         }
917 out:
918         brelse(bh);
919         return status;
920 }
921 
922 /* Find free entry in local quota file */
923 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
924                                                        int type,
925                                                        int *offset)
926 {
927         struct mem_dqinfo *info = sb_dqinfo(sb, type);
928         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
929         struct ocfs2_quota_chunk *chunk;
930         struct ocfs2_local_disk_chunk *dchunk;
931         int found = 0, len;
932 
933         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
934                 dchunk = (struct ocfs2_local_disk_chunk *)
935                                                 chunk->qc_headerbh->b_data;
936                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
937                         found = 1;
938                         break;
939                 }
940         }
941         if (!found)
942                 return NULL;
943 
944         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
945                 len = ol_chunk_entries(sb);
946         } else {
947                 len = (oinfo->dqi_blocks -
948                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
949                       * ol_quota_entries_per_block(sb);
950         }
951 
952         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
953         /* We failed? */
954         if (found == len) {
955                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
956                      " entries free (type=%d)\n", chunk->qc_num,
957                      le32_to_cpu(dchunk->dqc_free), type);
958                 return ERR_PTR(-EIO);
959         }
960         *offset = found;
961         return chunk;
962 }
963 
964 /* Add new chunk to the local quota file */
965 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
966                                                         struct super_block *sb,
967                                                         int type,
968                                                         int *offset)
969 {
970         struct mem_dqinfo *info = sb_dqinfo(sb, type);
971         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
972         struct inode *lqinode = sb_dqopt(sb)->files[type];
973         struct ocfs2_quota_chunk *chunk = NULL;
974         struct ocfs2_local_disk_chunk *dchunk;
975         int status;
976         handle_t *handle;
977         struct buffer_head *bh = NULL, *dbh = NULL;
978         u64 p_blkno;
979 
980         /* We are protected by dqio_sem so no locking needed */
981         status = ocfs2_extend_no_holes(lqinode, NULL,
982                                        i_size_read(lqinode) + 2 * sb->s_blocksize,
983                                        i_size_read(lqinode));
984         if (status < 0) {
985                 mlog_errno(status);
986                 goto out;
987         }
988         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
989                                           i_size_read(lqinode) + 2 * sb->s_blocksize);
990         if (status < 0) {
991                 mlog_errno(status);
992                 goto out;
993         }
994 
995         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
996         if (!chunk) {
997                 status = -ENOMEM;
998                 mlog_errno(status);
999                 goto out;
1000         }
1001         /* Local quota info and two new blocks we initialize */
1002         handle = ocfs2_start_trans(OCFS2_SB(sb),
1003                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1004                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1005         if (IS_ERR(handle)) {
1006                 status = PTR_ERR(handle);
1007                 mlog_errno(status);
1008                 goto out;
1009         }
1010 
1011         /* Initialize chunk header */
1012         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1013                                              &p_blkno, NULL, NULL);
1014         if (status < 0) {
1015                 mlog_errno(status);
1016                 goto out_trans;
1017         }
1018         bh = sb_getblk(sb, p_blkno);
1019         if (!bh) {
1020                 status = -ENOMEM;
1021                 mlog_errno(status);
1022                 goto out_trans;
1023         }
1024         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1025         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1026         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1027                                          OCFS2_JOURNAL_ACCESS_CREATE);
1028         if (status < 0) {
1029                 mlog_errno(status);
1030                 goto out_trans;
1031         }
1032         lock_buffer(bh);
1033         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1034         memset(dchunk->dqc_bitmap, 0,
1035                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1036                OCFS2_QBLK_RESERVED_SPACE);
1037         unlock_buffer(bh);
1038         ocfs2_journal_dirty(handle, bh);
1039 
1040         /* Initialize new block with structures */
1041         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1042                                              &p_blkno, NULL, NULL);
1043         if (status < 0) {
1044                 mlog_errno(status);
1045                 goto out_trans;
1046         }
1047         dbh = sb_getblk(sb, p_blkno);
1048         if (!dbh) {
1049                 status = -ENOMEM;
1050                 mlog_errno(status);
1051                 goto out_trans;
1052         }
1053         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1054         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1055                                          OCFS2_JOURNAL_ACCESS_CREATE);
1056         if (status < 0) {
1057                 mlog_errno(status);
1058                 goto out_trans;
1059         }
1060         lock_buffer(dbh);
1061         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1062         unlock_buffer(dbh);
1063         ocfs2_journal_dirty(handle, dbh);
1064 
1065         /* Update local quotafile info */
1066         oinfo->dqi_blocks += 2;
1067         oinfo->dqi_chunks++;
1068         status = ocfs2_local_write_info(sb, type);
1069         if (status < 0) {
1070                 mlog_errno(status);
1071                 goto out_trans;
1072         }
1073         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1074         if (status < 0) {
1075                 mlog_errno(status);
1076                 goto out;
1077         }
1078 
1079         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1080         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1081                                    struct ocfs2_quota_chunk,
1082                                    qc_chunk)->qc_num + 1;
1083         chunk->qc_headerbh = bh;
1084         *offset = 0;
1085         return chunk;
1086 out_trans:
1087         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1088 out:
1089         brelse(bh);
1090         brelse(dbh);
1091         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1092         return ERR_PTR(status);
1093 }
1094 
1095 /* Find free entry in local quota file */
1096 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1097                                                        struct super_block *sb,
1098                                                        int type,
1099                                                        int *offset)
1100 {
1101         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1102         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1103         struct ocfs2_quota_chunk *chunk;
1104         struct inode *lqinode = sb_dqopt(sb)->files[type];
1105         struct ocfs2_local_disk_chunk *dchunk;
1106         int epb = ol_quota_entries_per_block(sb);
1107         unsigned int chunk_blocks;
1108         struct buffer_head *bh;
1109         u64 p_blkno;
1110         int status;
1111         handle_t *handle;
1112 
1113         if (list_empty(&oinfo->dqi_chunk))
1114                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1115         /* Is the last chunk full? */
1116         chunk = list_entry(oinfo->dqi_chunk.prev,
1117                         struct ocfs2_quota_chunk, qc_chunk);
1118         chunk_blocks = oinfo->dqi_blocks -
1119                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1120         if (ol_chunk_blocks(sb) == chunk_blocks)
1121                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1122 
1123         /* We are protected by dqio_sem so no locking needed */
1124         status = ocfs2_extend_no_holes(lqinode, NULL,
1125                                        i_size_read(lqinode) + sb->s_blocksize,
1126                                        i_size_read(lqinode));
1127         if (status < 0) {
1128                 mlog_errno(status);
1129                 goto out;
1130         }
1131         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1132                                           i_size_read(lqinode) + sb->s_blocksize);
1133         if (status < 0) {
1134                 mlog_errno(status);
1135                 goto out;
1136         }
1137 
1138         /* Get buffer from the just added block */
1139         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1140                                              &p_blkno, NULL, NULL);
1141         if (status < 0) {
1142                 mlog_errno(status);
1143                 goto out;
1144         }
1145         bh = sb_getblk(sb, p_blkno);
1146         if (!bh) {
1147                 status = -ENOMEM;
1148                 mlog_errno(status);
1149                 goto out;
1150         }
1151         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1152 
1153         /* Local quota info, chunk header and the new block we initialize */
1154         handle = ocfs2_start_trans(OCFS2_SB(sb),
1155                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1156                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1157         if (IS_ERR(handle)) {
1158                 status = PTR_ERR(handle);
1159                 mlog_errno(status);
1160                 goto out;
1161         }
1162         /* Zero created block */
1163         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1164                                  OCFS2_JOURNAL_ACCESS_CREATE);
1165         if (status < 0) {
1166                 mlog_errno(status);
1167                 goto out_trans;
1168         }
1169         lock_buffer(bh);
1170         memset(bh->b_data, 0, sb->s_blocksize);
1171         unlock_buffer(bh);
1172         ocfs2_journal_dirty(handle, bh);
1173 
1174         /* Update chunk header */
1175         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1176                                          chunk->qc_headerbh,
1177                                  OCFS2_JOURNAL_ACCESS_WRITE);
1178         if (status < 0) {
1179                 mlog_errno(status);
1180                 goto out_trans;
1181         }
1182 
1183         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1184         lock_buffer(chunk->qc_headerbh);
1185         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1186         unlock_buffer(chunk->qc_headerbh);
1187         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1188 
1189         /* Update file header */
1190         oinfo->dqi_blocks++;
1191         status = ocfs2_local_write_info(sb, type);
1192         if (status < 0) {
1193                 mlog_errno(status);
1194                 goto out_trans;
1195         }
1196 
1197         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1198         if (status < 0) {
1199                 mlog_errno(status);
1200                 goto out;
1201         }
1202         *offset = chunk_blocks * epb;
1203         return chunk;
1204 out_trans:
1205         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1206 out:
1207         return ERR_PTR(status);
1208 }
1209 
1210 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1211 {
1212         int *offset = private;
1213         struct ocfs2_local_disk_chunk *dchunk;
1214 
1215         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1216         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1217         le32_add_cpu(&dchunk->dqc_free, -1);
1218 }
1219 
1220 /* Create dquot in the local file for given id */
1221 int ocfs2_create_local_dquot(struct dquot *dquot)
1222 {
1223         struct super_block *sb = dquot->dq_sb;
1224         int type = dquot->dq_id.type;
1225         struct inode *lqinode = sb_dqopt(sb)->files[type];
1226         struct ocfs2_quota_chunk *chunk;
1227         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1228         int offset;
1229         int status;
1230         u64 pcount;
1231 
1232         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1233         chunk = ocfs2_find_free_entry(sb, type, &offset);
1234         if (!chunk) {
1235                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1236                 if (IS_ERR(chunk)) {
1237                         status = PTR_ERR(chunk);
1238                         goto out;
1239                 }
1240         } else if (IS_ERR(chunk)) {
1241                 status = PTR_ERR(chunk);
1242                 goto out;
1243         }
1244         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1245         od->dq_chunk = chunk;
1246         status = ocfs2_extent_map_get_blocks(lqinode,
1247                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1248                                      &od->dq_local_phys_blk,
1249                                      &pcount,
1250                                      NULL);
1251 
1252         /* Initialize dquot structure on disk */
1253         status = ocfs2_local_write_dquot(dquot);
1254         if (status < 0) {
1255                 mlog_errno(status);
1256                 goto out;
1257         }
1258 
1259         /* Mark structure as allocated */
1260         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1261                                  &offset);
1262         if (status < 0) {
1263                 mlog_errno(status);
1264                 goto out;
1265         }
1266 out:
1267         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1268         return status;
1269 }
1270 
1271 /*
1272  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1273  * already started a transaction and written all changes to global quota file
1274  */
1275 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1276 {
1277         int status;
1278         int type = dquot->dq_id.type;
1279         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1280         struct super_block *sb = dquot->dq_sb;
1281         struct ocfs2_local_disk_chunk *dchunk;
1282         int offset;
1283 
1284         status = ocfs2_journal_access_dq(handle,
1285                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1286                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1287         if (status < 0) {
1288                 mlog_errno(status);
1289                 goto out;
1290         }
1291         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1292                                              od->dq_local_off);
1293         dchunk = (struct ocfs2_local_disk_chunk *)
1294                         (od->dq_chunk->qc_headerbh->b_data);
1295         /* Mark structure as freed */
1296         lock_buffer(od->dq_chunk->qc_headerbh);
1297         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1298         le32_add_cpu(&dchunk->dqc_free, 1);
1299         unlock_buffer(od->dq_chunk->qc_headerbh);
1300         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1301 
1302 out:
1303         return status;
1304 }
1305 
1306 static const struct quota_format_ops ocfs2_format_ops = {
1307         .check_quota_file       = ocfs2_local_check_quota_file,
1308         .read_file_info         = ocfs2_local_read_info,
1309         .write_file_info        = ocfs2_global_write_info,
1310         .free_file_info         = ocfs2_local_free_info,
1311 };
1312 
1313 struct quota_format_type ocfs2_quota_format = {
1314         .qf_fmt_id = QFMT_OCFS2,
1315         .qf_ops = &ocfs2_format_ops,
1316         .qf_owner = THIS_MODULE
1317 };
1318 

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