1 /*
2 * Implementation of operations over local quota file
3 */
4
5 #include <linux/fs.h>
6 #include <linux/quota.h>
7 #include <linux/quotaops.h>
8 #include <linux/module.h>
9
10 #define MLOG_MASK_PREFIX ML_QUOTA
11 #include <cluster/masklog.h>
12
13 #include "ocfs2_fs.h"
14 #include "ocfs2.h"
15 #include "inode.h"
16 #include "alloc.h"
17 #include "file.h"
18 #include "buffer_head_io.h"
19 #include "journal.h"
20 #include "sysfile.h"
21 #include "dlmglue.h"
22 #include "quota.h"
23
24 /* Number of local quota structures per block */
ol_quota_entries_per_block(struct super_block * sb)25 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
26 {
27 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
28 sizeof(struct ocfs2_local_disk_dqblk));
29 }
30
31 /* Number of blocks with entries in one chunk */
ol_chunk_blocks(struct super_block * sb)32 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
33 {
34 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
35 OCFS2_QBLK_RESERVED_SPACE) << 3) /
36 ol_quota_entries_per_block(sb);
37 }
38
39 /* Number of entries in a chunk bitmap */
ol_chunk_entries(struct super_block * sb)40 static unsigned int ol_chunk_entries(struct super_block *sb)
41 {
42 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
43 }
44
45 /* Offset of the chunk in quota file */
ol_quota_chunk_block(struct super_block * sb,int c)46 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
47 {
48 /* 1 block for local quota file info, 1 block per chunk for chunk info */
49 return 1 + (ol_chunk_blocks(sb) + 1) * c;
50 }
51
ol_dqblk_block(struct super_block * sb,int c,int off)52 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
53 {
54 int epb = ol_quota_entries_per_block(sb);
55
56 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
57 }
58
ol_dqblk_block_off(struct super_block * sb,int c,int off)59 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
60 {
61 int epb = ol_quota_entries_per_block(sb);
62
63 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
64 }
65
66 /* Offset of the dquot structure in the quota file */
ol_dqblk_off(struct super_block * sb,int c,int off)67 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
68 {
69 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
70 ol_dqblk_block_off(sb, c, off);
71 }
72
73 /* Compute block number from given offset */
ol_dqblk_file_block(struct super_block * sb,loff_t off)74 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
75 {
76 return off >> sb->s_blocksize_bits;
77 }
78
ol_dqblk_block_offset(struct super_block * sb,loff_t off)79 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
80 {
81 return off & ((1 << sb->s_blocksize_bits) - 1);
82 }
83
84 /* Compute offset in the chunk of a structure with the given offset */
ol_dqblk_chunk_off(struct super_block * sb,int c,loff_t off)85 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
86 {
87 int epb = ol_quota_entries_per_block(sb);
88
89 return ((off >> sb->s_blocksize_bits) -
90 ol_quota_chunk_block(sb, c) - 1) * epb
91 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
92 sizeof(struct ocfs2_local_disk_dqblk);
93 }
94
95 /* Write bufferhead into the fs */
ocfs2_modify_bh(struct inode * inode,struct buffer_head * bh,void (* modify)(struct buffer_head *,void *),void * private)96 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
97 void (*modify)(struct buffer_head *, void *), void *private)
98 {
99 struct super_block *sb = inode->i_sb;
100 handle_t *handle;
101 int status;
102
103 handle = ocfs2_start_trans(OCFS2_SB(sb), 1);
104 if (IS_ERR(handle)) {
105 status = PTR_ERR(handle);
106 mlog_errno(status);
107 return status;
108 }
109 status = ocfs2_journal_access_dq(handle, inode, bh,
110 OCFS2_JOURNAL_ACCESS_WRITE);
111 if (status < 0) {
112 mlog_errno(status);
113 ocfs2_commit_trans(OCFS2_SB(sb), handle);
114 return status;
115 }
116 lock_buffer(bh);
117 modify(bh, private);
118 unlock_buffer(bh);
119 status = ocfs2_journal_dirty(handle, bh);
120 if (status < 0) {
121 mlog_errno(status);
122 ocfs2_commit_trans(OCFS2_SB(sb), handle);
123 return status;
124 }
125 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
126 if (status < 0) {
127 mlog_errno(status);
128 return status;
129 }
130 return 0;
131 }
132
133 /* Check whether we understand format of quota files */
ocfs2_local_check_quota_file(struct super_block * sb,int type)134 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
135 {
136 unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
137 unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
138 unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
139 unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
140 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
141 GROUP_QUOTA_SYSTEM_INODE };
142 struct buffer_head *bh = NULL;
143 struct inode *linode = sb_dqopt(sb)->files[type];
144 struct inode *ginode = NULL;
145 struct ocfs2_disk_dqheader *dqhead;
146 int status, ret = 0;
147
148 /* First check whether we understand local quota file */
149 status = ocfs2_read_quota_block(linode, 0, &bh);
150 if (status) {
151 mlog_errno(status);
152 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
153 type);
154 goto out_err;
155 }
156 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
157 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
158 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
159 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
160 lmagics[type], type);
161 goto out_err;
162 }
163 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
164 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
165 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
166 lversions[type], type);
167 goto out_err;
168 }
169 brelse(bh);
170 bh = NULL;
171
172 /* Next check whether we understand global quota file */
173 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
174 OCFS2_INVALID_SLOT);
175 if (!ginode) {
176 mlog(ML_ERROR, "cannot get global quota file inode "
177 "(type=%d)\n", type);
178 goto out_err;
179 }
180 /* Since the header is read only, we don't care about locking */
181 status = ocfs2_read_quota_block(ginode, 0, &bh);
182 if (status) {
183 mlog_errno(status);
184 mlog(ML_ERROR, "failed to read global quota file header "
185 "(type=%d)\n", type);
186 goto out_err;
187 }
188 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
189 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
190 mlog(ML_ERROR, "global quota file magic does not match "
191 "(%u != %u), type=%d\n",
192 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
193 goto out_err;
194 }
195 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
196 mlog(ML_ERROR, "global quota file version does not match "
197 "(%u != %u), type=%d\n",
198 le32_to_cpu(dqhead->dqh_version), gversions[type],
199 type);
200 goto out_err;
201 }
202
203 ret = 1;
204 out_err:
205 brelse(bh);
206 iput(ginode);
207 return ret;
208 }
209
210 /* Release given list of quota file chunks */
ocfs2_release_local_quota_bitmaps(struct list_head * head)211 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
212 {
213 struct ocfs2_quota_chunk *pos, *next;
214
215 list_for_each_entry_safe(pos, next, head, qc_chunk) {
216 list_del(&pos->qc_chunk);
217 brelse(pos->qc_headerbh);
218 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
219 }
220 }
221
222 /* Load quota bitmaps into memory */
ocfs2_load_local_quota_bitmaps(struct inode * inode,struct ocfs2_local_disk_dqinfo * ldinfo,struct list_head * head)223 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
224 struct ocfs2_local_disk_dqinfo *ldinfo,
225 struct list_head *head)
226 {
227 struct ocfs2_quota_chunk *newchunk;
228 int i, status;
229
230 INIT_LIST_HEAD(head);
231 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
232 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
233 if (!newchunk) {
234 ocfs2_release_local_quota_bitmaps(head);
235 return -ENOMEM;
236 }
237 newchunk->qc_num = i;
238 newchunk->qc_headerbh = NULL;
239 status = ocfs2_read_quota_block(inode,
240 ol_quota_chunk_block(inode->i_sb, i),
241 &newchunk->qc_headerbh);
242 if (status) {
243 mlog_errno(status);
244 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
245 ocfs2_release_local_quota_bitmaps(head);
246 return status;
247 }
248 list_add_tail(&newchunk->qc_chunk, head);
249 }
250 return 0;
251 }
252
olq_update_info(struct buffer_head * bh,void * private)253 static void olq_update_info(struct buffer_head *bh, void *private)
254 {
255 struct mem_dqinfo *info = private;
256 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
257 struct ocfs2_local_disk_dqinfo *ldinfo;
258
259 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
260 OCFS2_LOCAL_INFO_OFF);
261 spin_lock(&dq_data_lock);
262 ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
263 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
264 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
265 spin_unlock(&dq_data_lock);
266 }
267
ocfs2_add_recovery_chunk(struct super_block * sb,struct ocfs2_local_disk_chunk * dchunk,int chunk,struct list_head * head)268 static int ocfs2_add_recovery_chunk(struct super_block *sb,
269 struct ocfs2_local_disk_chunk *dchunk,
270 int chunk,
271 struct list_head *head)
272 {
273 struct ocfs2_recovery_chunk *rc;
274
275 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
276 if (!rc)
277 return -ENOMEM;
278 rc->rc_chunk = chunk;
279 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
280 if (!rc->rc_bitmap) {
281 kfree(rc);
282 return -ENOMEM;
283 }
284 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
285 (ol_chunk_entries(sb) + 7) >> 3);
286 list_add_tail(&rc->rc_list, head);
287 return 0;
288 }
289
free_recovery_list(struct list_head * head)290 static void free_recovery_list(struct list_head *head)
291 {
292 struct ocfs2_recovery_chunk *next;
293 struct ocfs2_recovery_chunk *rchunk;
294
295 list_for_each_entry_safe(rchunk, next, head, rc_list) {
296 list_del(&rchunk->rc_list);
297 kfree(rchunk->rc_bitmap);
298 kfree(rchunk);
299 }
300 }
301
ocfs2_free_quota_recovery(struct ocfs2_quota_recovery * rec)302 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
303 {
304 int type;
305
306 for (type = 0; type < MAXQUOTAS; type++)
307 free_recovery_list(&(rec->r_list[type]));
308 kfree(rec);
309 }
310
311 /* Load entries in our quota file we have to recover*/
ocfs2_recovery_load_quota(struct inode * lqinode,struct ocfs2_local_disk_dqinfo * ldinfo,int type,struct list_head * head)312 static int ocfs2_recovery_load_quota(struct inode *lqinode,
313 struct ocfs2_local_disk_dqinfo *ldinfo,
314 int type,
315 struct list_head *head)
316 {
317 struct super_block *sb = lqinode->i_sb;
318 struct buffer_head *hbh;
319 struct ocfs2_local_disk_chunk *dchunk;
320 int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
321 int status = 0;
322
323 for (i = 0; i < chunks; i++) {
324 hbh = NULL;
325 status = ocfs2_read_quota_block(lqinode,
326 ol_quota_chunk_block(sb, i),
327 &hbh);
328 if (status) {
329 mlog_errno(status);
330 break;
331 }
332 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
333 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
334 status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
335 brelse(hbh);
336 if (status < 0)
337 break;
338 }
339 if (status < 0)
340 free_recovery_list(head);
341 return status;
342 }
343
ocfs2_alloc_quota_recovery(void)344 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
345 {
346 int type;
347 struct ocfs2_quota_recovery *rec;
348
349 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
350 if (!rec)
351 return NULL;
352 for (type = 0; type < MAXQUOTAS; type++)
353 INIT_LIST_HEAD(&(rec->r_list[type]));
354 return rec;
355 }
356
357 /* Load information we need for quota recovery into memory */
ocfs2_begin_quota_recovery(struct ocfs2_super * osb,int slot_num)358 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
359 struct ocfs2_super *osb,
360 int slot_num)
361 {
362 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
363 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
364 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
365 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
366 struct super_block *sb = osb->sb;
367 struct ocfs2_local_disk_dqinfo *ldinfo;
368 struct inode *lqinode;
369 struct buffer_head *bh;
370 int type;
371 int status = 0;
372 struct ocfs2_quota_recovery *rec;
373
374 mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
375 rec = ocfs2_alloc_quota_recovery();
376 if (!rec)
377 return ERR_PTR(-ENOMEM);
378 /* First init... */
379
380 for (type = 0; type < MAXQUOTAS; type++) {
381 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
382 continue;
383 /* At this point, journal of the slot is already replayed so
384 * we can trust metadata and data of the quota file */
385 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
386 if (!lqinode) {
387 status = -ENOENT;
388 goto out;
389 }
390 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
391 OCFS2_META_LOCK_RECOVERY);
392 if (status < 0) {
393 mlog_errno(status);
394 goto out_put;
395 }
396 /* Now read local header */
397 bh = NULL;
398 status = ocfs2_read_quota_block(lqinode, 0, &bh);
399 if (status) {
400 mlog_errno(status);
401 mlog(ML_ERROR, "failed to read quota file info header "
402 "(slot=%d type=%d)\n", slot_num, type);
403 goto out_lock;
404 }
405 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
406 OCFS2_LOCAL_INFO_OFF);
407 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
408 &rec->r_list[type]);
409 brelse(bh);
410 out_lock:
411 ocfs2_inode_unlock(lqinode, 1);
412 out_put:
413 iput(lqinode);
414 if (status < 0)
415 break;
416 }
417 out:
418 if (status < 0) {
419 ocfs2_free_quota_recovery(rec);
420 rec = ERR_PTR(status);
421 }
422 return rec;
423 }
424
425 /* Sync changes in local quota file into global quota file and
426 * reinitialize local quota file.
427 * The function expects local quota file to be already locked and
428 * dqonoff_mutex locked. */
ocfs2_recover_local_quota_file(struct inode * lqinode,int type,struct ocfs2_quota_recovery * rec)429 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
430 int type,
431 struct ocfs2_quota_recovery *rec)
432 {
433 struct super_block *sb = lqinode->i_sb;
434 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
435 struct ocfs2_local_disk_chunk *dchunk;
436 struct ocfs2_local_disk_dqblk *dqblk;
437 struct dquot *dquot;
438 handle_t *handle;
439 struct buffer_head *hbh = NULL, *qbh = NULL;
440 int status = 0;
441 int bit, chunk;
442 struct ocfs2_recovery_chunk *rchunk, *next;
443 qsize_t spacechange, inodechange;
444
445 mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
446
447 status = ocfs2_lock_global_qf(oinfo, 1);
448 if (status < 0)
449 goto out;
450
451 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
452 chunk = rchunk->rc_chunk;
453 hbh = NULL;
454 status = ocfs2_read_quota_block(lqinode,
455 ol_quota_chunk_block(sb, chunk),
456 &hbh);
457 if (status) {
458 mlog_errno(status);
459 break;
460 }
461 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
462 for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
463 qbh = NULL;
464 status = ocfs2_read_quota_block(lqinode,
465 ol_dqblk_block(sb, chunk, bit),
466 &qbh);
467 if (status) {
468 mlog_errno(status);
469 break;
470 }
471 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
472 ol_dqblk_block_off(sb, chunk, bit));
473 dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
474 if (!dquot) {
475 status = -EIO;
476 mlog(ML_ERROR, "Failed to get quota structure "
477 "for id %u, type %d. Cannot finish quota "
478 "file recovery.\n",
479 (unsigned)le64_to_cpu(dqblk->dqb_id),
480 type);
481 goto out_put_bh;
482 }
483 handle = ocfs2_start_trans(OCFS2_SB(sb),
484 OCFS2_QSYNC_CREDITS);
485 if (IS_ERR(handle)) {
486 status = PTR_ERR(handle);
487 mlog_errno(status);
488 goto out_put_dquot;
489 }
490 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
491 spin_lock(&dq_data_lock);
492 /* Add usage from quota entry into quota changes
493 * of our node. Auxiliary variables are important
494 * due to signedness */
495 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
496 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
497 dquot->dq_dqb.dqb_curspace += spacechange;
498 dquot->dq_dqb.dqb_curinodes += inodechange;
499 spin_unlock(&dq_data_lock);
500 /* We want to drop reference held by the crashed
501 * node. Since we have our own reference we know
502 * global structure actually won't be freed. */
503 status = ocfs2_global_release_dquot(dquot);
504 if (status < 0) {
505 mlog_errno(status);
506 goto out_commit;
507 }
508 /* Release local quota file entry */
509 status = ocfs2_journal_access_dq(handle, lqinode,
510 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
511 if (status < 0) {
512 mlog_errno(status);
513 goto out_commit;
514 }
515 lock_buffer(qbh);
516 WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
517 ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
518 le32_add_cpu(&dchunk->dqc_free, 1);
519 unlock_buffer(qbh);
520 status = ocfs2_journal_dirty(handle, qbh);
521 if (status < 0)
522 mlog_errno(status);
523 out_commit:
524 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
525 ocfs2_commit_trans(OCFS2_SB(sb), handle);
526 out_put_dquot:
527 dqput(dquot);
528 out_put_bh:
529 brelse(qbh);
530 if (status < 0)
531 break;
532 }
533 brelse(hbh);
534 list_del(&rchunk->rc_list);
535 kfree(rchunk->rc_bitmap);
536 kfree(rchunk);
537 if (status < 0)
538 break;
539 }
540 ocfs2_unlock_global_qf(oinfo, 1);
541 out:
542 if (status < 0)
543 free_recovery_list(&(rec->r_list[type]));
544 mlog_exit(status);
545 return status;
546 }
547
548 /* Recover local quota files for given node different from us */
ocfs2_finish_quota_recovery(struct ocfs2_super * osb,struct ocfs2_quota_recovery * rec,int slot_num)549 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
550 struct ocfs2_quota_recovery *rec,
551 int slot_num)
552 {
553 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
554 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
555 struct super_block *sb = osb->sb;
556 struct ocfs2_local_disk_dqinfo *ldinfo;
557 struct buffer_head *bh;
558 handle_t *handle;
559 int type;
560 int status = 0;
561 struct inode *lqinode;
562 unsigned int flags;
563
564 mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
565 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
566 for (type = 0; type < MAXQUOTAS; type++) {
567 if (list_empty(&(rec->r_list[type])))
568 continue;
569 mlog(0, "Recovering quota in slot %d\n", slot_num);
570 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
571 if (!lqinode) {
572 status = -ENOENT;
573 goto out;
574 }
575 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
576 OCFS2_META_LOCK_NOQUEUE);
577 /* Someone else is holding the lock? Then he must be
578 * doing the recovery. Just skip the file... */
579 if (status == -EAGAIN) {
580 mlog(ML_NOTICE, "skipping quota recovery for slot %d "
581 "because quota file is locked.\n", slot_num);
582 status = 0;
583 goto out_put;
584 } else if (status < 0) {
585 mlog_errno(status);
586 goto out_put;
587 }
588 /* Now read local header */
589 bh = NULL;
590 status = ocfs2_read_quota_block(lqinode, 0, &bh);
591 if (status) {
592 mlog_errno(status);
593 mlog(ML_ERROR, "failed to read quota file info header "
594 "(slot=%d type=%d)\n", slot_num, type);
595 goto out_lock;
596 }
597 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
598 OCFS2_LOCAL_INFO_OFF);
599 /* Is recovery still needed? */
600 flags = le32_to_cpu(ldinfo->dqi_flags);
601 if (!(flags & OLQF_CLEAN))
602 status = ocfs2_recover_local_quota_file(lqinode,
603 type,
604 rec);
605 /* We don't want to mark file as clean when it is actually
606 * active */
607 if (slot_num == osb->slot_num)
608 goto out_bh;
609 /* Mark quota file as clean if we are recovering quota file of
610 * some other node. */
611 handle = ocfs2_start_trans(osb, 1);
612 if (IS_ERR(handle)) {
613 status = PTR_ERR(handle);
614 mlog_errno(status);
615 goto out_bh;
616 }
617 status = ocfs2_journal_access_dq(handle, lqinode, bh,
618 OCFS2_JOURNAL_ACCESS_WRITE);
619 if (status < 0) {
620 mlog_errno(status);
621 goto out_trans;
622 }
623 lock_buffer(bh);
624 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
625 unlock_buffer(bh);
626 status = ocfs2_journal_dirty(handle, bh);
627 if (status < 0)
628 mlog_errno(status);
629 out_trans:
630 ocfs2_commit_trans(osb, handle);
631 out_bh:
632 brelse(bh);
633 out_lock:
634 ocfs2_inode_unlock(lqinode, 1);
635 out_put:
636 iput(lqinode);
637 if (status < 0)
638 break;
639 }
640 out:
641 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
642 kfree(rec);
643 return status;
644 }
645
646 /* Read information header from quota file */
ocfs2_local_read_info(struct super_block * sb,int type)647 static int ocfs2_local_read_info(struct super_block *sb, int type)
648 {
649 struct ocfs2_local_disk_dqinfo *ldinfo;
650 struct mem_dqinfo *info = sb_dqinfo(sb, type);
651 struct ocfs2_mem_dqinfo *oinfo;
652 struct inode *lqinode = sb_dqopt(sb)->files[type];
653 int status;
654 struct buffer_head *bh = NULL;
655 struct ocfs2_quota_recovery *rec;
656 int locked = 0;
657
658 info->dqi_maxblimit = 0x7fffffffffffffffLL;
659 info->dqi_maxilimit = 0x7fffffffffffffffLL;
660 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
661 if (!oinfo) {
662 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
663 " info.");
664 goto out_err;
665 }
666 info->dqi_priv = oinfo;
667 oinfo->dqi_type = type;
668 INIT_LIST_HEAD(&oinfo->dqi_chunk);
669 oinfo->dqi_rec = NULL;
670 oinfo->dqi_lqi_bh = NULL;
671 oinfo->dqi_ibh = NULL;
672
673 status = ocfs2_global_read_info(sb, type);
674 if (status < 0)
675 goto out_err;
676
677 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
678 if (status < 0) {
679 mlog_errno(status);
680 goto out_err;
681 }
682 locked = 1;
683
684 /* Now read local header */
685 status = ocfs2_read_quota_block(lqinode, 0, &bh);
686 if (status) {
687 mlog_errno(status);
688 mlog(ML_ERROR, "failed to read quota file info header "
689 "(type=%d)\n", type);
690 goto out_err;
691 }
692 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
693 OCFS2_LOCAL_INFO_OFF);
694 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
695 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
696 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
697 oinfo->dqi_ibh = bh;
698
699 /* We crashed when using local quota file? */
700 if (!(info->dqi_flags & OLQF_CLEAN)) {
701 rec = OCFS2_SB(sb)->quota_rec;
702 if (!rec) {
703 rec = ocfs2_alloc_quota_recovery();
704 if (!rec) {
705 status = -ENOMEM;
706 mlog_errno(status);
707 goto out_err;
708 }
709 OCFS2_SB(sb)->quota_rec = rec;
710 }
711
712 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
713 &rec->r_list[type]);
714 if (status < 0) {
715 mlog_errno(status);
716 goto out_err;
717 }
718 }
719
720 status = ocfs2_load_local_quota_bitmaps(lqinode,
721 ldinfo,
722 &oinfo->dqi_chunk);
723 if (status < 0) {
724 mlog_errno(status);
725 goto out_err;
726 }
727
728 /* Now mark quota file as used */
729 info->dqi_flags &= ~OLQF_CLEAN;
730 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
731 if (status < 0) {
732 mlog_errno(status);
733 goto out_err;
734 }
735
736 return 0;
737 out_err:
738 if (oinfo) {
739 iput(oinfo->dqi_gqinode);
740 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
741 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
742 brelse(oinfo->dqi_lqi_bh);
743 if (locked)
744 ocfs2_inode_unlock(lqinode, 1);
745 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
746 kfree(oinfo);
747 }
748 brelse(bh);
749 return -1;
750 }
751
752 /* Write local info to quota file */
ocfs2_local_write_info(struct super_block * sb,int type)753 static int ocfs2_local_write_info(struct super_block *sb, int type)
754 {
755 struct mem_dqinfo *info = sb_dqinfo(sb, type);
756 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
757 ->dqi_ibh;
758 int status;
759
760 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
761 info);
762 if (status < 0) {
763 mlog_errno(status);
764 return -1;
765 }
766
767 return 0;
768 }
769
770 /* Release info from memory */
ocfs2_local_free_info(struct super_block * sb,int type)771 static int ocfs2_local_free_info(struct super_block *sb, int type)
772 {
773 struct mem_dqinfo *info = sb_dqinfo(sb, type);
774 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
775 struct ocfs2_quota_chunk *chunk;
776 struct ocfs2_local_disk_chunk *dchunk;
777 int mark_clean = 1, len;
778 int status;
779
780 /* At this point we know there are no more dquots and thus
781 * even if there's some sync in the pdflush queue, it won't
782 * find any dquots and return without doing anything */
783 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
784 iput(oinfo->dqi_gqinode);
785 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
786 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
787 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
788 dchunk = (struct ocfs2_local_disk_chunk *)
789 (chunk->qc_headerbh->b_data);
790 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
791 len = ol_chunk_entries(sb);
792 } else {
793 len = (oinfo->dqi_blocks -
794 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
795 * ol_quota_entries_per_block(sb);
796 }
797 /* Not all entries free? Bug! */
798 if (le32_to_cpu(dchunk->dqc_free) != len) {
799 mlog(ML_ERROR, "releasing quota file with used "
800 "entries (type=%d)\n", type);
801 mark_clean = 0;
802 }
803 }
804 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
805
806 /* dqonoff_mutex protects us against racing with recovery thread... */
807 if (oinfo->dqi_rec) {
808 ocfs2_free_quota_recovery(oinfo->dqi_rec);
809 mark_clean = 0;
810 }
811
812 if (!mark_clean)
813 goto out;
814
815 /* Mark local file as clean */
816 info->dqi_flags |= OLQF_CLEAN;
817 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
818 oinfo->dqi_ibh,
819 olq_update_info,
820 info);
821 if (status < 0) {
822 mlog_errno(status);
823 goto out;
824 }
825
826 out:
827 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
828 brelse(oinfo->dqi_ibh);
829 brelse(oinfo->dqi_lqi_bh);
830 kfree(oinfo);
831 return 0;
832 }
833
olq_set_dquot(struct buffer_head * bh,void * private)834 static void olq_set_dquot(struct buffer_head *bh, void *private)
835 {
836 struct ocfs2_dquot *od = private;
837 struct ocfs2_local_disk_dqblk *dqblk;
838 struct super_block *sb = od->dq_dquot.dq_sb;
839
840 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
841 + ol_dqblk_block_offset(sb, od->dq_local_off));
842
843 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
844 spin_lock(&dq_data_lock);
845 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
846 od->dq_origspace);
847 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
848 od->dq_originodes);
849 spin_unlock(&dq_data_lock);
850 mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
851 od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
852 (long long)le64_to_cpu(dqblk->dqb_inodemod));
853 }
854
855 /* Write dquot to local quota file */
ocfs2_local_write_dquot(struct dquot * dquot)856 static int ocfs2_local_write_dquot(struct dquot *dquot)
857 {
858 struct super_block *sb = dquot->dq_sb;
859 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
860 struct buffer_head *bh = NULL;
861 int status;
862
863 status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
864 ol_dqblk_file_block(sb, od->dq_local_off),
865 &bh);
866 if (status) {
867 mlog_errno(status);
868 goto out;
869 }
870 status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
871 olq_set_dquot, od);
872 if (status < 0) {
873 mlog_errno(status);
874 goto out;
875 }
876 out:
877 brelse(bh);
878 return status;
879 }
880
881 /* Find free entry in local quota file */
ocfs2_find_free_entry(struct super_block * sb,int type,int * offset)882 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
883 int type,
884 int *offset)
885 {
886 struct mem_dqinfo *info = sb_dqinfo(sb, type);
887 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
888 struct ocfs2_quota_chunk *chunk;
889 struct ocfs2_local_disk_chunk *dchunk;
890 int found = 0, len;
891
892 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
893 dchunk = (struct ocfs2_local_disk_chunk *)
894 chunk->qc_headerbh->b_data;
895 if (le32_to_cpu(dchunk->dqc_free) > 0) {
896 found = 1;
897 break;
898 }
899 }
900 if (!found)
901 return NULL;
902
903 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
904 len = ol_chunk_entries(sb);
905 } else {
906 len = (oinfo->dqi_blocks -
907 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
908 * ol_quota_entries_per_block(sb);
909 }
910
911 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
912 /* We failed? */
913 if (found == len) {
914 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
915 " entries free (type=%d)\n", chunk->qc_num,
916 le32_to_cpu(dchunk->dqc_free), type);
917 return ERR_PTR(-EIO);
918 }
919 *offset = found;
920 return chunk;
921 }
922
923 /* Add new chunk to the local quota file */
ocfs2_local_quota_add_chunk(struct super_block * sb,int type,int * offset)924 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
925 struct super_block *sb,
926 int type,
927 int *offset)
928 {
929 struct mem_dqinfo *info = sb_dqinfo(sb, type);
930 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
931 struct inode *lqinode = sb_dqopt(sb)->files[type];
932 struct ocfs2_quota_chunk *chunk = NULL;
933 struct ocfs2_local_disk_chunk *dchunk;
934 int status;
935 handle_t *handle;
936 struct buffer_head *bh = NULL;
937 u64 p_blkno;
938
939 /* We are protected by dqio_sem so no locking needed */
940 status = ocfs2_extend_no_holes(lqinode,
941 lqinode->i_size + 2 * sb->s_blocksize,
942 lqinode->i_size);
943 if (status < 0) {
944 mlog_errno(status);
945 goto out;
946 }
947 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
948 lqinode->i_size + 2 * sb->s_blocksize);
949 if (status < 0) {
950 mlog_errno(status);
951 goto out;
952 }
953
954 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
955 if (!chunk) {
956 status = -ENOMEM;
957 mlog_errno(status);
958 goto out;
959 }
960
961 down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
962 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
963 &p_blkno, NULL, NULL);
964 up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
965 if (status < 0) {
966 mlog_errno(status);
967 goto out;
968 }
969 bh = sb_getblk(sb, p_blkno);
970 if (!bh) {
971 status = -ENOMEM;
972 mlog_errno(status);
973 goto out;
974 }
975 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
976
977 handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
978 if (IS_ERR(handle)) {
979 status = PTR_ERR(handle);
980 mlog_errno(status);
981 goto out;
982 }
983
984 status = ocfs2_journal_access_dq(handle, lqinode, bh,
985 OCFS2_JOURNAL_ACCESS_WRITE);
986 if (status < 0) {
987 mlog_errno(status);
988 goto out_trans;
989 }
990 lock_buffer(bh);
991 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
992 memset(dchunk->dqc_bitmap, 0,
993 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
994 OCFS2_QBLK_RESERVED_SPACE);
995 set_buffer_uptodate(bh);
996 unlock_buffer(bh);
997 status = ocfs2_journal_dirty(handle, bh);
998 if (status < 0) {
999 mlog_errno(status);
1000 goto out_trans;
1001 }
1002
1003 oinfo->dqi_blocks += 2;
1004 oinfo->dqi_chunks++;
1005 status = ocfs2_local_write_info(sb, type);
1006 if (status < 0) {
1007 mlog_errno(status);
1008 goto out_trans;
1009 }
1010 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1011 if (status < 0) {
1012 mlog_errno(status);
1013 goto out;
1014 }
1015
1016 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1017 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1018 struct ocfs2_quota_chunk,
1019 qc_chunk)->qc_num + 1;
1020 chunk->qc_headerbh = bh;
1021 *offset = 0;
1022 return chunk;
1023 out_trans:
1024 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1025 out:
1026 brelse(bh);
1027 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1028 return ERR_PTR(status);
1029 }
1030
1031 /* Find free entry in local quota file */
ocfs2_extend_local_quota_file(struct super_block * sb,int type,int * offset)1032 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1033 struct super_block *sb,
1034 int type,
1035 int *offset)
1036 {
1037 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1038 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1039 struct ocfs2_quota_chunk *chunk;
1040 struct inode *lqinode = sb_dqopt(sb)->files[type];
1041 struct ocfs2_local_disk_chunk *dchunk;
1042 int epb = ol_quota_entries_per_block(sb);
1043 unsigned int chunk_blocks;
1044 int status;
1045 handle_t *handle;
1046
1047 if (list_empty(&oinfo->dqi_chunk))
1048 return ocfs2_local_quota_add_chunk(sb, type, offset);
1049 /* Is the last chunk full? */
1050 chunk = list_entry(oinfo->dqi_chunk.prev,
1051 struct ocfs2_quota_chunk, qc_chunk);
1052 chunk_blocks = oinfo->dqi_blocks -
1053 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1054 if (ol_chunk_blocks(sb) == chunk_blocks)
1055 return ocfs2_local_quota_add_chunk(sb, type, offset);
1056
1057 /* We are protected by dqio_sem so no locking needed */
1058 status = ocfs2_extend_no_holes(lqinode,
1059 lqinode->i_size + sb->s_blocksize,
1060 lqinode->i_size);
1061 if (status < 0) {
1062 mlog_errno(status);
1063 goto out;
1064 }
1065 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1066 lqinode->i_size + sb->s_blocksize);
1067 if (status < 0) {
1068 mlog_errno(status);
1069 goto out;
1070 }
1071 handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
1072 if (IS_ERR(handle)) {
1073 status = PTR_ERR(handle);
1074 mlog_errno(status);
1075 goto out;
1076 }
1077 status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh,
1078 OCFS2_JOURNAL_ACCESS_WRITE);
1079 if (status < 0) {
1080 mlog_errno(status);
1081 goto out_trans;
1082 }
1083
1084 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1085 lock_buffer(chunk->qc_headerbh);
1086 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1087 unlock_buffer(chunk->qc_headerbh);
1088 status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1089 if (status < 0) {
1090 mlog_errno(status);
1091 goto out_trans;
1092 }
1093 oinfo->dqi_blocks++;
1094 status = ocfs2_local_write_info(sb, type);
1095 if (status < 0) {
1096 mlog_errno(status);
1097 goto out_trans;
1098 }
1099
1100 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1101 if (status < 0) {
1102 mlog_errno(status);
1103 goto out;
1104 }
1105 *offset = chunk_blocks * epb;
1106 return chunk;
1107 out_trans:
1108 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1109 out:
1110 return ERR_PTR(status);
1111 }
1112
olq_alloc_dquot(struct buffer_head * bh,void * private)1113 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1114 {
1115 int *offset = private;
1116 struct ocfs2_local_disk_chunk *dchunk;
1117
1118 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1119 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1120 le32_add_cpu(&dchunk->dqc_free, -1);
1121 }
1122
1123 /* Create dquot in the local file for given id */
ocfs2_create_local_dquot(struct dquot * dquot)1124 static int ocfs2_create_local_dquot(struct dquot *dquot)
1125 {
1126 struct super_block *sb = dquot->dq_sb;
1127 int type = dquot->dq_type;
1128 struct inode *lqinode = sb_dqopt(sb)->files[type];
1129 struct ocfs2_quota_chunk *chunk;
1130 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1131 int offset;
1132 int status;
1133
1134 chunk = ocfs2_find_free_entry(sb, type, &offset);
1135 if (!chunk) {
1136 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1137 if (IS_ERR(chunk))
1138 return PTR_ERR(chunk);
1139 } else if (IS_ERR(chunk)) {
1140 return PTR_ERR(chunk);
1141 }
1142 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1143 od->dq_chunk = chunk;
1144
1145 /* Initialize dquot structure on disk */
1146 status = ocfs2_local_write_dquot(dquot);
1147 if (status < 0) {
1148 mlog_errno(status);
1149 goto out;
1150 }
1151
1152 /* Mark structure as allocated */
1153 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1154 &offset);
1155 if (status < 0) {
1156 mlog_errno(status);
1157 goto out;
1158 }
1159 out:
1160 return status;
1161 }
1162
1163 /* Create entry in local file for dquot, load data from the global file */
ocfs2_local_read_dquot(struct dquot * dquot)1164 static int ocfs2_local_read_dquot(struct dquot *dquot)
1165 {
1166 int status;
1167
1168 mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
1169
1170 status = ocfs2_global_read_dquot(dquot);
1171 if (status < 0) {
1172 mlog_errno(status);
1173 goto out_err;
1174 }
1175
1176 /* Now create entry in the local quota file */
1177 status = ocfs2_create_local_dquot(dquot);
1178 if (status < 0) {
1179 mlog_errno(status);
1180 goto out_err;
1181 }
1182 mlog_exit(0);
1183 return 0;
1184 out_err:
1185 mlog_exit(status);
1186 return status;
1187 }
1188
1189 /* Release dquot structure from local quota file. ocfs2_release_dquot() has
1190 * already started a transaction and obtained exclusive lock for global
1191 * quota file. */
ocfs2_local_release_dquot(struct dquot * dquot)1192 static int ocfs2_local_release_dquot(struct dquot *dquot)
1193 {
1194 int status;
1195 int type = dquot->dq_type;
1196 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1197 struct super_block *sb = dquot->dq_sb;
1198 struct ocfs2_local_disk_chunk *dchunk;
1199 int offset;
1200 handle_t *handle = journal_current_handle();
1201
1202 BUG_ON(!handle);
1203 /* First write all local changes to global file */
1204 status = ocfs2_global_release_dquot(dquot);
1205 if (status < 0) {
1206 mlog_errno(status);
1207 goto out;
1208 }
1209
1210 status = ocfs2_journal_access_dq(handle, sb_dqopt(sb)->files[type],
1211 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1212 if (status < 0) {
1213 mlog_errno(status);
1214 goto out;
1215 }
1216 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1217 od->dq_local_off);
1218 dchunk = (struct ocfs2_local_disk_chunk *)
1219 (od->dq_chunk->qc_headerbh->b_data);
1220 /* Mark structure as freed */
1221 lock_buffer(od->dq_chunk->qc_headerbh);
1222 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1223 le32_add_cpu(&dchunk->dqc_free, 1);
1224 unlock_buffer(od->dq_chunk->qc_headerbh);
1225 status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1226 if (status < 0) {
1227 mlog_errno(status);
1228 goto out;
1229 }
1230 status = 0;
1231 out:
1232 /* Clear the read bit so that next time someone uses this
1233 * dquot he reads fresh info from disk and allocates local
1234 * dquot structure */
1235 clear_bit(DQ_READ_B, &dquot->dq_flags);
1236 return status;
1237 }
1238
1239 static struct quota_format_ops ocfs2_format_ops = {
1240 .check_quota_file = ocfs2_local_check_quota_file,
1241 .read_file_info = ocfs2_local_read_info,
1242 .write_file_info = ocfs2_global_write_info,
1243 .free_file_info = ocfs2_local_free_info,
1244 .read_dqblk = ocfs2_local_read_dquot,
1245 .commit_dqblk = ocfs2_local_write_dquot,
1246 .release_dqblk = ocfs2_local_release_dquot,
1247 };
1248
1249 struct quota_format_type ocfs2_quota_format = {
1250 .qf_fmt_id = QFMT_OCFS2,
1251 .qf_ops = &ocfs2_format_ops,
1252 .qf_owner = THIS_MODULE
1253 };
1254