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FRV: Use generic show_interrupts()
[cris-mirror.git] / fs / ocfs2 / quota_local.c
blobdc78764ccc4c6211bacee0a409f23606e24b3997
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 #define MLOG_MASK_PREFIX ML_QUOTA
12 #include <cluster/masklog.h>
13
14 #include "ocfs2_fs.h"
15 #include "ocfs2.h"
16 #include "inode.h"
17 #include "alloc.h"
18 #include "file.h"
19 #include "buffer_head_io.h"
20 #include "journal.h"
21 #include "sysfile.h"
22 #include "dlmglue.h"
23 #include "quota.h"
24 #include "uptodate.h"
25 #include "super.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 /* Compute block number from given offset */
77 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
78 {
79 return off >> sb->s_blocksize_bits;
80 }
81
82 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
83 {
84 return off & ((1 << sb->s_blocksize_bits) - 1);
85 }
86
87 /* Compute offset in the chunk of a structure with the given offset */
88 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
89 {
90 int epb = ol_quota_entries_per_block(sb);
91
92 return ((off >> sb->s_blocksize_bits) -
93 ol_quota_chunk_block(sb, c) - 1) * epb
94 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
95 sizeof(struct ocfs2_local_disk_dqblk);
96 }
97
98 /* Write bufferhead into the fs */
99 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
100 void (*modify)(struct buffer_head *, void *), void *private)
101 {
102 struct super_block *sb = inode->i_sb;
103 handle_t *handle;
104 int status;
105
106 handle = ocfs2_start_trans(OCFS2_SB(sb),
107 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
108 if (IS_ERR(handle)) {
109 status = PTR_ERR(handle);
110 mlog_errno(status);
111 return status;
112 }
113 status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
114 OCFS2_JOURNAL_ACCESS_WRITE);
115 if (status < 0) {
116 mlog_errno(status);
117 ocfs2_commit_trans(OCFS2_SB(sb), handle);
118 return status;
119 }
120 lock_buffer(bh);
121 modify(bh, private);
122 unlock_buffer(bh);
123 ocfs2_journal_dirty(handle, bh);
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 /*
134 * Read quota block from a given logical offset.
135 *
136 * This function acquires ip_alloc_sem and thus it must not be called with a
137 * transaction started.
138 */
139 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
140 struct buffer_head **bh)
141 {
142 int rc = 0;
143 struct buffer_head *tmp = *bh;
144
145 if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
146 ocfs2_error(inode->i_sb,
147 "Quota file %llu is probably corrupted! Requested "
148 "to read block %Lu but file has size only %Lu\n",
149 (unsigned long long)OCFS2_I(inode)->ip_blkno,
150 (unsigned long long)v_block,
151 (unsigned long long)i_size_read(inode));
152 return -EIO;
153 }
154 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
155 ocfs2_validate_quota_block);
156 if (rc)
157 mlog_errno(rc);
158
159 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
160 if (!rc && !*bh)
161 *bh = tmp;
162
163 return rc;
164 }
165
166 /* Check whether we understand format of quota files */
167 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
168 {
169 unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
170 unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
171 unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
172 unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
173 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
174 GROUP_QUOTA_SYSTEM_INODE };
175 struct buffer_head *bh = NULL;
176 struct inode *linode = sb_dqopt(sb)->files[type];
177 struct inode *ginode = NULL;
178 struct ocfs2_disk_dqheader *dqhead;
179 int status, ret = 0;
180
181 /* First check whether we understand local quota file */
182 status = ocfs2_read_quota_block(linode, 0, &bh);
183 if (status) {
184 mlog_errno(status);
185 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
186 type);
187 goto out_err;
188 }
189 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
190 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
191 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
192 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
193 lmagics[type], type);
194 goto out_err;
195 }
196 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
197 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
198 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
199 lversions[type], type);
200 goto out_err;
201 }
202 brelse(bh);
203 bh = NULL;
204
205 /* Next check whether we understand global quota file */
206 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
207 OCFS2_INVALID_SLOT);
208 if (!ginode) {
209 mlog(ML_ERROR, "cannot get global quota file inode "
210 "(type=%d)\n", type);
211 goto out_err;
212 }
213 /* Since the header is read only, we don't care about locking */
214 status = ocfs2_read_quota_block(ginode, 0, &bh);
215 if (status) {
216 mlog_errno(status);
217 mlog(ML_ERROR, "failed to read global quota file header "
218 "(type=%d)\n", type);
219 goto out_err;
220 }
221 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
222 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
223 mlog(ML_ERROR, "global quota file magic does not match "
224 "(%u != %u), type=%d\n",
225 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
226 goto out_err;
227 }
228 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
229 mlog(ML_ERROR, "global quota file version does not match "
230 "(%u != %u), type=%d\n",
231 le32_to_cpu(dqhead->dqh_version), gversions[type],
232 type);
233 goto out_err;
234 }
235
236 ret = 1;
237 out_err:
238 brelse(bh);
239 iput(ginode);
240 return ret;
241 }
242
243 /* Release given list of quota file chunks */
244 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
245 {
246 struct ocfs2_quota_chunk *pos, *next;
247
248 list_for_each_entry_safe(pos, next, head, qc_chunk) {
249 list_del(&pos->qc_chunk);
250 brelse(pos->qc_headerbh);
251 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
252 }
253 }
254
255 /* Load quota bitmaps into memory */
256 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
257 struct ocfs2_local_disk_dqinfo *ldinfo,
258 struct list_head *head)
259 {
260 struct ocfs2_quota_chunk *newchunk;
261 int i, status;
262
263 INIT_LIST_HEAD(head);
264 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
265 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
266 if (!newchunk) {
267 ocfs2_release_local_quota_bitmaps(head);
268 return -ENOMEM;
269 }
270 newchunk->qc_num = i;
271 newchunk->qc_headerbh = NULL;
272 status = ocfs2_read_quota_block(inode,
273 ol_quota_chunk_block(inode->i_sb, i),
274 &newchunk->qc_headerbh);
275 if (status) {
276 mlog_errno(status);
277 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
278 ocfs2_release_local_quota_bitmaps(head);
279 return status;
280 }
281 list_add_tail(&newchunk->qc_chunk, head);
282 }
283 return 0;
284 }
285
286 static void olq_update_info(struct buffer_head *bh, void *private)
287 {
288 struct mem_dqinfo *info = private;
289 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
290 struct ocfs2_local_disk_dqinfo *ldinfo;
291
292 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
293 OCFS2_LOCAL_INFO_OFF);
294 spin_lock(&dq_data_lock);
295 ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
296 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
297 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
298 spin_unlock(&dq_data_lock);
299 }
300
301 static int ocfs2_add_recovery_chunk(struct super_block *sb,
302 struct ocfs2_local_disk_chunk *dchunk,
303 int chunk,
304 struct list_head *head)
305 {
306 struct ocfs2_recovery_chunk *rc;
307
308 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
309 if (!rc)
310 return -ENOMEM;
311 rc->rc_chunk = chunk;
312 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
313 if (!rc->rc_bitmap) {
314 kfree(rc);
315 return -ENOMEM;
316 }
317 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
318 (ol_chunk_entries(sb) + 7) >> 3);
319 list_add_tail(&rc->rc_list, head);
320 return 0;
321 }
322
323 static void free_recovery_list(struct list_head *head)
324 {
325 struct ocfs2_recovery_chunk *next;
326 struct ocfs2_recovery_chunk *rchunk;
327
328 list_for_each_entry_safe(rchunk, next, head, rc_list) {
329 list_del(&rchunk->rc_list);
330 kfree(rchunk->rc_bitmap);
331 kfree(rchunk);
332 }
333 }
334
335 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
336 {
337 int type;
338
339 for (type = 0; type < MAXQUOTAS; type++)
340 free_recovery_list(&(rec->r_list[type]));
341 kfree(rec);
342 }
343
344 /* Load entries in our quota file we have to recover*/
345 static int ocfs2_recovery_load_quota(struct inode *lqinode,
346 struct ocfs2_local_disk_dqinfo *ldinfo,
347 int type,
348 struct list_head *head)
349 {
350 struct super_block *sb = lqinode->i_sb;
351 struct buffer_head *hbh;
352 struct ocfs2_local_disk_chunk *dchunk;
353 int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
354 int status = 0;
355
356 for (i = 0; i < chunks; i++) {
357 hbh = NULL;
358 status = ocfs2_read_quota_block(lqinode,
359 ol_quota_chunk_block(sb, i),
360 &hbh);
361 if (status) {
362 mlog_errno(status);
363 break;
364 }
365 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
366 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
367 status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
368 brelse(hbh);
369 if (status < 0)
370 break;
371 }
372 if (status < 0)
373 free_recovery_list(head);
374 return status;
375 }
376
377 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
378 {
379 int type;
380 struct ocfs2_quota_recovery *rec;
381
382 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
383 if (!rec)
384 return NULL;
385 for (type = 0; type < MAXQUOTAS; type++)
386 INIT_LIST_HEAD(&(rec->r_list[type]));
387 return rec;
388 }
389
390 /* Load information we need for quota recovery into memory */
391 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
392 struct ocfs2_super *osb,
393 int slot_num)
394 {
395 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
396 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
397 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
398 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
399 struct super_block *sb = osb->sb;
400 struct ocfs2_local_disk_dqinfo *ldinfo;
401 struct inode *lqinode;
402 struct buffer_head *bh;
403 int type;
404 int status = 0;
405 struct ocfs2_quota_recovery *rec;
406
407 mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
408 rec = ocfs2_alloc_quota_recovery();
409 if (!rec)
410 return ERR_PTR(-ENOMEM);
411 /* First init... */
412
413 for (type = 0; type < MAXQUOTAS; type++) {
414 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
415 continue;
416 /* At this point, journal of the slot is already replayed so
417 * we can trust metadata and data of the quota file */
418 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
419 if (!lqinode) {
420 status = -ENOENT;
421 goto out;
422 }
423 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
424 OCFS2_META_LOCK_RECOVERY);
425 if (status < 0) {
426 mlog_errno(status);
427 goto out_put;
428 }
429 /* Now read local header */
430 bh = NULL;
431 status = ocfs2_read_quota_block(lqinode, 0, &bh);
432 if (status) {
433 mlog_errno(status);
434 mlog(ML_ERROR, "failed to read quota file info header "
435 "(slot=%d type=%d)\n", slot_num, type);
436 goto out_lock;
437 }
438 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
439 OCFS2_LOCAL_INFO_OFF);
440 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
441 &rec->r_list[type]);
442 brelse(bh);
443 out_lock:
444 ocfs2_inode_unlock(lqinode, 1);
445 out_put:
446 iput(lqinode);
447 if (status < 0)
448 break;
449 }
450 out:
451 if (status < 0) {
452 ocfs2_free_quota_recovery(rec);
453 rec = ERR_PTR(status);
454 }
455 return rec;
456 }
457
458 /* Sync changes in local quota file into global quota file and
459 * reinitialize local quota file.
460 * The function expects local quota file to be already locked and
461 * dqonoff_mutex locked. */
462 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
463 int type,
464 struct ocfs2_quota_recovery *rec)
465 {
466 struct super_block *sb = lqinode->i_sb;
467 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
468 struct ocfs2_local_disk_chunk *dchunk;
469 struct ocfs2_local_disk_dqblk *dqblk;
470 struct dquot *dquot;
471 handle_t *handle;
472 struct buffer_head *hbh = NULL, *qbh = NULL;
473 int status = 0;
474 int bit, chunk;
475 struct ocfs2_recovery_chunk *rchunk, *next;
476 qsize_t spacechange, inodechange;
477
478 mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
479
480 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
481 chunk = rchunk->rc_chunk;
482 hbh = NULL;
483 status = ocfs2_read_quota_block(lqinode,
484 ol_quota_chunk_block(sb, chunk),
485 &hbh);
486 if (status) {
487 mlog_errno(status);
488 break;
489 }
490 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
491 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
492 qbh = NULL;
493 status = ocfs2_read_quota_block(lqinode,
494 ol_dqblk_block(sb, chunk, bit),
495 &qbh);
496 if (status) {
497 mlog_errno(status);
498 break;
499 }
500 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
501 ol_dqblk_block_off(sb, chunk, bit));
502 dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
503 if (!dquot) {
504 status = -EIO;
505 mlog(ML_ERROR, "Failed to get quota structure "
506 "for id %u, type %d. Cannot finish quota "
507 "file recovery.\n",
508 (unsigned)le64_to_cpu(dqblk->dqb_id),
509 type);
510 goto out_put_bh;
511 }
512 status = ocfs2_lock_global_qf(oinfo, 1);
513 if (status < 0) {
514 mlog_errno(status);
515 goto out_put_dquot;
516 }
517
518 handle = ocfs2_start_trans(OCFS2_SB(sb),
519 OCFS2_QSYNC_CREDITS);
520 if (IS_ERR(handle)) {
521 status = PTR_ERR(handle);
522 mlog_errno(status);
523 goto out_drop_lock;
524 }
525 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
526 spin_lock(&dq_data_lock);
527 /* Add usage from quota entry into quota changes
528 * of our node. Auxiliary variables are important
529 * due to signedness */
530 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
531 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
532 dquot->dq_dqb.dqb_curspace += spacechange;
533 dquot->dq_dqb.dqb_curinodes += inodechange;
534 spin_unlock(&dq_data_lock);
535 /* We want to drop reference held by the crashed
536 * node. Since we have our own reference we know
537 * global structure actually won't be freed. */
538 status = ocfs2_global_release_dquot(dquot);
539 if (status < 0) {
540 mlog_errno(status);
541 goto out_commit;
542 }
543 /* Release local quota file entry */
544 status = ocfs2_journal_access_dq(handle,
545 INODE_CACHE(lqinode),
546 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
547 if (status < 0) {
548 mlog_errno(status);
549 goto out_commit;
550 }
551 lock_buffer(qbh);
552 WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
553 ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
554 le32_add_cpu(&dchunk->dqc_free, 1);
555 unlock_buffer(qbh);
556 ocfs2_journal_dirty(handle, qbh);
557 out_commit:
558 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
559 ocfs2_commit_trans(OCFS2_SB(sb), handle);
560 out_drop_lock:
561 ocfs2_unlock_global_qf(oinfo, 1);
562 out_put_dquot:
563 dqput(dquot);
564 out_put_bh:
565 brelse(qbh);
566 if (status < 0)
567 break;
568 }
569 brelse(hbh);
570 list_del(&rchunk->rc_list);
571 kfree(rchunk->rc_bitmap);
572 kfree(rchunk);
573 if (status < 0)
574 break;
575 }
576 if (status < 0)
577 free_recovery_list(&(rec->r_list[type]));
578 mlog_exit(status);
579 return status;
580 }
581
582 /* Recover local quota files for given node different from us */
583 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
584 struct ocfs2_quota_recovery *rec,
585 int slot_num)
586 {
587 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
588 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
589 struct super_block *sb = osb->sb;
590 struct ocfs2_local_disk_dqinfo *ldinfo;
591 struct buffer_head *bh;
592 handle_t *handle;
593 int type;
594 int status = 0;
595 struct inode *lqinode;
596 unsigned int flags;
597
598 mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
599 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
600 for (type = 0; type < MAXQUOTAS; type++) {
601 if (list_empty(&(rec->r_list[type])))
602 continue;
603 mlog(0, "Recovering quota in slot %d\n", slot_num);
604 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
605 if (!lqinode) {
606 status = -ENOENT;
607 goto out;
608 }
609 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
610 OCFS2_META_LOCK_NOQUEUE);
611 /* Someone else is holding the lock? Then he must be
612 * doing the recovery. Just skip the file... */
613 if (status == -EAGAIN) {
614 mlog(ML_NOTICE, "skipping quota recovery for slot %d "
615 "because quota file is locked.\n", slot_num);
616 status = 0;
617 goto out_put;
618 } else if (status < 0) {
619 mlog_errno(status);
620 goto out_put;
621 }
622 /* Now read local header */
623 bh = NULL;
624 status = ocfs2_read_quota_block(lqinode, 0, &bh);
625 if (status) {
626 mlog_errno(status);
627 mlog(ML_ERROR, "failed to read quota file info header "
628 "(slot=%d type=%d)\n", slot_num, type);
629 goto out_lock;
630 }
631 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
632 OCFS2_LOCAL_INFO_OFF);
633 /* Is recovery still needed? */
634 flags = le32_to_cpu(ldinfo->dqi_flags);
635 if (!(flags & OLQF_CLEAN))
636 status = ocfs2_recover_local_quota_file(lqinode,
637 type,
638 rec);
639 /* We don't want to mark file as clean when it is actually
640 * active */
641 if (slot_num == osb->slot_num)
642 goto out_bh;
643 /* Mark quota file as clean if we are recovering quota file of
644 * some other node. */
645 handle = ocfs2_start_trans(osb,
646 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
647 if (IS_ERR(handle)) {
648 status = PTR_ERR(handle);
649 mlog_errno(status);
650 goto out_bh;
651 }
652 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
653 bh,
654 OCFS2_JOURNAL_ACCESS_WRITE);
655 if (status < 0) {
656 mlog_errno(status);
657 goto out_trans;
658 }
659 lock_buffer(bh);
660 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
661 unlock_buffer(bh);
662 ocfs2_journal_dirty(handle, bh);
663 out_trans:
664 ocfs2_commit_trans(osb, handle);
665 out_bh:
666 brelse(bh);
667 out_lock:
668 ocfs2_inode_unlock(lqinode, 1);
669 out_put:
670 iput(lqinode);
671 if (status < 0)
672 break;
673 }
674 out:
675 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
676 kfree(rec);
677 return status;
678 }
679
680 /* Read information header from quota file */
681 static int ocfs2_local_read_info(struct super_block *sb, int type)
682 {
683 struct ocfs2_local_disk_dqinfo *ldinfo;
684 struct mem_dqinfo *info = sb_dqinfo(sb, type);
685 struct ocfs2_mem_dqinfo *oinfo;
686 struct inode *lqinode = sb_dqopt(sb)->files[type];
687 int status;
688 struct buffer_head *bh = NULL;
689 struct ocfs2_quota_recovery *rec;
690 int locked = 0;
691
692 /* We don't need the lock and we have to acquire quota file locks
693 * which will later depend on this lock */
694 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
695 info->dqi_maxblimit = 0x7fffffffffffffffLL;
696 info->dqi_maxilimit = 0x7fffffffffffffffLL;
697 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
698 if (!oinfo) {
699 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
700 " info.");
701 goto out_err;
702 }
703 info->dqi_priv = oinfo;
704 oinfo->dqi_type = type;
705 INIT_LIST_HEAD(&oinfo->dqi_chunk);
706 oinfo->dqi_rec = NULL;
707 oinfo->dqi_lqi_bh = NULL;
708 oinfo->dqi_libh = NULL;
709
710 status = ocfs2_global_read_info(sb, type);
711 if (status < 0)
712 goto out_err;
713
714 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
715 if (status < 0) {
716 mlog_errno(status);
717 goto out_err;
718 }
719 locked = 1;
720
721 /* Now read local header */
722 status = ocfs2_read_quota_block(lqinode, 0, &bh);
723 if (status) {
724 mlog_errno(status);
725 mlog(ML_ERROR, "failed to read quota file info header "
726 "(type=%d)\n", type);
727 goto out_err;
728 }
729 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
730 OCFS2_LOCAL_INFO_OFF);
731 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
732 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
733 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
734 oinfo->dqi_libh = bh;
735
736 /* We crashed when using local quota file? */
737 if (!(info->dqi_flags & OLQF_CLEAN)) {
738 rec = OCFS2_SB(sb)->quota_rec;
739 if (!rec) {
740 rec = ocfs2_alloc_quota_recovery();
741 if (!rec) {
742 status = -ENOMEM;
743 mlog_errno(status);
744 goto out_err;
745 }
746 OCFS2_SB(sb)->quota_rec = rec;
747 }
748
749 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
750 &rec->r_list[type]);
751 if (status < 0) {
752 mlog_errno(status);
753 goto out_err;
754 }
755 }
756
757 status = ocfs2_load_local_quota_bitmaps(lqinode,
758 ldinfo,
759 &oinfo->dqi_chunk);
760 if (status < 0) {
761 mlog_errno(status);
762 goto out_err;
763 }
764
765 /* Now mark quota file as used */
766 info->dqi_flags &= ~OLQF_CLEAN;
767 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
768 if (status < 0) {
769 mlog_errno(status);
770 goto out_err;
771 }
772
773 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
774 return 0;
775 out_err:
776 if (oinfo) {
777 iput(oinfo->dqi_gqinode);
778 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
779 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
780 brelse(oinfo->dqi_lqi_bh);
781 if (locked)
782 ocfs2_inode_unlock(lqinode, 1);
783 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
784 kfree(oinfo);
785 }
786 brelse(bh);
787 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
788 return -1;
789 }
790
791 /* Write local info to quota file */
792 static int ocfs2_local_write_info(struct super_block *sb, int type)
793 {
794 struct mem_dqinfo *info = sb_dqinfo(sb, type);
795 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
796 ->dqi_libh;
797 int status;
798
799 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
800 info);
801 if (status < 0) {
802 mlog_errno(status);
803 return -1;
804 }
805
806 return 0;
807 }
808
809 /* Release info from memory */
810 static int ocfs2_local_free_info(struct super_block *sb, int type)
811 {
812 struct mem_dqinfo *info = sb_dqinfo(sb, type);
813 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
814 struct ocfs2_quota_chunk *chunk;
815 struct ocfs2_local_disk_chunk *dchunk;
816 int mark_clean = 1, len;
817 int status;
818
819 iput(oinfo->dqi_gqinode);
820 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
821 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
822 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
823 dchunk = (struct ocfs2_local_disk_chunk *)
824 (chunk->qc_headerbh->b_data);
825 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
826 len = ol_chunk_entries(sb);
827 } else {
828 len = (oinfo->dqi_blocks -
829 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
830 * ol_quota_entries_per_block(sb);
831 }
832 /* Not all entries free? Bug! */
833 if (le32_to_cpu(dchunk->dqc_free) != len) {
834 mlog(ML_ERROR, "releasing quota file with used "
835 "entries (type=%d)\n", type);
836 mark_clean = 0;
837 }
838 }
839 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
840
841 /* dqonoff_mutex protects us against racing with recovery thread... */
842 if (oinfo->dqi_rec) {
843 ocfs2_free_quota_recovery(oinfo->dqi_rec);
844 mark_clean = 0;
845 }
846
847 if (!mark_clean)
848 goto out;
849
850 /* Mark local file as clean */
851 info->dqi_flags |= OLQF_CLEAN;
852 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
853 oinfo->dqi_libh,
854 olq_update_info,
855 info);
856 if (status < 0) {
857 mlog_errno(status);
858 goto out;
859 }
860
861 out:
862 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
863 brelse(oinfo->dqi_libh);
864 brelse(oinfo->dqi_lqi_bh);
865 kfree(oinfo);
866 return 0;
867 }
868
869 static void olq_set_dquot(struct buffer_head *bh, void *private)
870 {
871 struct ocfs2_dquot *od = private;
872 struct ocfs2_local_disk_dqblk *dqblk;
873 struct super_block *sb = od->dq_dquot.dq_sb;
874
875 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
876 + ol_dqblk_block_offset(sb, od->dq_local_off));
877
878 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
879 spin_lock(&dq_data_lock);
880 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
881 od->dq_origspace);
882 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
883 od->dq_originodes);
884 spin_unlock(&dq_data_lock);
885 mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
886 od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
887 (long long)le64_to_cpu(dqblk->dqb_inodemod));
888 }
889
890 /* Write dquot to local quota file */
891 int ocfs2_local_write_dquot(struct dquot *dquot)
892 {
893 struct super_block *sb = dquot->dq_sb;
894 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
895 struct buffer_head *bh;
896 struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
897 int status;
898
899 status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
900 &bh);
901 if (status) {
902 mlog_errno(status);
903 goto out;
904 }
905 status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
906 if (status < 0) {
907 mlog_errno(status);
908 goto out;
909 }
910 out:
911 brelse(bh);
912 return status;
913 }
914
915 /* Find free entry in local quota file */
916 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
917 int type,
918 int *offset)
919 {
920 struct mem_dqinfo *info = sb_dqinfo(sb, type);
921 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
922 struct ocfs2_quota_chunk *chunk;
923 struct ocfs2_local_disk_chunk *dchunk;
924 int found = 0, len;
925
926 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
927 dchunk = (struct ocfs2_local_disk_chunk *)
928 chunk->qc_headerbh->b_data;
929 if (le32_to_cpu(dchunk->dqc_free) > 0) {
930 found = 1;
931 break;
932 }
933 }
934 if (!found)
935 return NULL;
936
937 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
938 len = ol_chunk_entries(sb);
939 } else {
940 len = (oinfo->dqi_blocks -
941 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
942 * ol_quota_entries_per_block(sb);
943 }
944
945 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
946 /* We failed? */
947 if (found == len) {
948 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
949 " entries free (type=%d)\n", chunk->qc_num,
950 le32_to_cpu(dchunk->dqc_free), type);
951 return ERR_PTR(-EIO);
952 }
953 *offset = found;
954 return chunk;
955 }
956
957 /* Add new chunk to the local quota file */
958 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
959 struct super_block *sb,
960 int type,
961 int *offset)
962 {
963 struct mem_dqinfo *info = sb_dqinfo(sb, type);
964 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
965 struct inode *lqinode = sb_dqopt(sb)->files[type];
966 struct ocfs2_quota_chunk *chunk = NULL;
967 struct ocfs2_local_disk_chunk *dchunk;
968 int status;
969 handle_t *handle;
970 struct buffer_head *bh = NULL, *dbh = NULL;
971 u64 p_blkno;
972
973 /* We are protected by dqio_sem so no locking needed */
974 status = ocfs2_extend_no_holes(lqinode, NULL,
975 lqinode->i_size + 2 * sb->s_blocksize,
976 lqinode->i_size);
977 if (status < 0) {
978 mlog_errno(status);
979 goto out;
980 }
981 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
982 lqinode->i_size + 2 * sb->s_blocksize);
983 if (status < 0) {
984 mlog_errno(status);
985 goto out;
986 }
987
988 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
989 if (!chunk) {
990 status = -ENOMEM;
991 mlog_errno(status);
992 goto out;
993 }
994 /* Local quota info and two new blocks we initialize */
995 handle = ocfs2_start_trans(OCFS2_SB(sb),
996 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
997 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
998 if (IS_ERR(handle)) {
999 status = PTR_ERR(handle);
1000 mlog_errno(status);
1001 goto out;
1002 }
1003
1004 /* Initialize chunk header */
1005 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1006 &p_blkno, NULL, NULL);
1007 if (status < 0) {
1008 mlog_errno(status);
1009 goto out_trans;
1010 }
1011 bh = sb_getblk(sb, p_blkno);
1012 if (!bh) {
1013 status = -ENOMEM;
1014 mlog_errno(status);
1015 goto out_trans;
1016 }
1017 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1018 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1019 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1020 OCFS2_JOURNAL_ACCESS_CREATE);
1021 if (status < 0) {
1022 mlog_errno(status);
1023 goto out_trans;
1024 }
1025 lock_buffer(bh);
1026 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1027 memset(dchunk->dqc_bitmap, 0,
1028 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1029 OCFS2_QBLK_RESERVED_SPACE);
1030 unlock_buffer(bh);
1031 ocfs2_journal_dirty(handle, bh);
1032
1033 /* Initialize new block with structures */
1034 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1035 &p_blkno, NULL, NULL);
1036 if (status < 0) {
1037 mlog_errno(status);
1038 goto out_trans;
1039 }
1040 dbh = sb_getblk(sb, p_blkno);
1041 if (!dbh) {
1042 status = -ENOMEM;
1043 mlog_errno(status);
1044 goto out_trans;
1045 }
1046 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1047 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1048 OCFS2_JOURNAL_ACCESS_CREATE);
1049 if (status < 0) {
1050 mlog_errno(status);
1051 goto out_trans;
1052 }
1053 lock_buffer(dbh);
1054 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1055 unlock_buffer(dbh);
1056 ocfs2_journal_dirty(handle, dbh);
1057
1058 /* Update local quotafile info */
1059 oinfo->dqi_blocks += 2;
1060 oinfo->dqi_chunks++;
1061 status = ocfs2_local_write_info(sb, type);
1062 if (status < 0) {
1063 mlog_errno(status);
1064 goto out_trans;
1065 }
1066 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1067 if (status < 0) {
1068 mlog_errno(status);
1069 goto out;
1070 }
1071
1072 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1073 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1074 struct ocfs2_quota_chunk,
1075 qc_chunk)->qc_num + 1;
1076 chunk->qc_headerbh = bh;
1077 *offset = 0;
1078 return chunk;
1079 out_trans:
1080 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1081 out:
1082 brelse(bh);
1083 brelse(dbh);
1084 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1085 return ERR_PTR(status);
1086 }
1087
1088 /* Find free entry in local quota file */
1089 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1090 struct super_block *sb,
1091 int type,
1092 int *offset)
1093 {
1094 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1095 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1096 struct ocfs2_quota_chunk *chunk;
1097 struct inode *lqinode = sb_dqopt(sb)->files[type];
1098 struct ocfs2_local_disk_chunk *dchunk;
1099 int epb = ol_quota_entries_per_block(sb);
1100 unsigned int chunk_blocks;
1101 struct buffer_head *bh;
1102 u64 p_blkno;
1103 int status;
1104 handle_t *handle;
1105
1106 if (list_empty(&oinfo->dqi_chunk))
1107 return ocfs2_local_quota_add_chunk(sb, type, offset);
1108 /* Is the last chunk full? */
1109 chunk = list_entry(oinfo->dqi_chunk.prev,
1110 struct ocfs2_quota_chunk, qc_chunk);
1111 chunk_blocks = oinfo->dqi_blocks -
1112 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1113 if (ol_chunk_blocks(sb) == chunk_blocks)
1114 return ocfs2_local_quota_add_chunk(sb, type, offset);
1115
1116 /* We are protected by dqio_sem so no locking needed */
1117 status = ocfs2_extend_no_holes(lqinode, NULL,
1118 lqinode->i_size + sb->s_blocksize,
1119 lqinode->i_size);
1120 if (status < 0) {
1121 mlog_errno(status);
1122 goto out;
1123 }
1124 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1125 lqinode->i_size + sb->s_blocksize);
1126 if (status < 0) {
1127 mlog_errno(status);
1128 goto out;
1129 }
1130
1131 /* Get buffer from the just added block */
1132 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1133 &p_blkno, NULL, NULL);
1134 if (status < 0) {
1135 mlog_errno(status);
1136 goto out;
1137 }
1138 bh = sb_getblk(sb, p_blkno);
1139 if (!bh) {
1140 status = -ENOMEM;
1141 mlog_errno(status);
1142 goto out;
1143 }
1144 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1145
1146 /* Local quota info, chunk header and the new block we initialize */
1147 handle = ocfs2_start_trans(OCFS2_SB(sb),
1148 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1149 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1150 if (IS_ERR(handle)) {
1151 status = PTR_ERR(handle);
1152 mlog_errno(status);
1153 goto out;
1154 }
1155 /* Zero created block */
1156 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1157 OCFS2_JOURNAL_ACCESS_CREATE);
1158 if (status < 0) {
1159 mlog_errno(status);
1160 goto out_trans;
1161 }
1162 lock_buffer(bh);
1163 memset(bh->b_data, 0, sb->s_blocksize);
1164 unlock_buffer(bh);
1165 ocfs2_journal_dirty(handle, bh);
1166
1167 /* Update chunk header */
1168 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1169 chunk->qc_headerbh,
1170 OCFS2_JOURNAL_ACCESS_WRITE);
1171 if (status < 0) {
1172 mlog_errno(status);
1173 goto out_trans;
1174 }
1175
1176 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1177 lock_buffer(chunk->qc_headerbh);
1178 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1179 unlock_buffer(chunk->qc_headerbh);
1180 ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1181
1182 /* Update file header */
1183 oinfo->dqi_blocks++;
1184 status = ocfs2_local_write_info(sb, type);
1185 if (status < 0) {
1186 mlog_errno(status);
1187 goto out_trans;
1188 }
1189
1190 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1191 if (status < 0) {
1192 mlog_errno(status);
1193 goto out;
1194 }
1195 *offset = chunk_blocks * epb;
1196 return chunk;
1197 out_trans:
1198 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1199 out:
1200 return ERR_PTR(status);
1201 }
1202
1203 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1204 {
1205 int *offset = private;
1206 struct ocfs2_local_disk_chunk *dchunk;
1207
1208 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1209 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1210 le32_add_cpu(&dchunk->dqc_free, -1);
1211 }
1212
1213 /* Create dquot in the local file for given id */
1214 int ocfs2_create_local_dquot(struct dquot *dquot)
1215 {
1216 struct super_block *sb = dquot->dq_sb;
1217 int type = dquot->dq_type;
1218 struct inode *lqinode = sb_dqopt(sb)->files[type];
1219 struct ocfs2_quota_chunk *chunk;
1220 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1221 int offset;
1222 int status;
1223 u64 pcount;
1224
1225 down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1226 chunk = ocfs2_find_free_entry(sb, type, &offset);
1227 if (!chunk) {
1228 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1229 if (IS_ERR(chunk)) {
1230 status = PTR_ERR(chunk);
1231 goto out;
1232 }
1233 } else if (IS_ERR(chunk)) {
1234 status = PTR_ERR(chunk);
1235 goto out;
1236 }
1237 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1238 od->dq_chunk = chunk;
1239 status = ocfs2_extent_map_get_blocks(lqinode,
1240 ol_dqblk_block(sb, chunk->qc_num, offset),
1241 &od->dq_local_phys_blk,
1242 &pcount,
1243 NULL);
1244
1245 /* Initialize dquot structure on disk */
1246 status = ocfs2_local_write_dquot(dquot);
1247 if (status < 0) {
1248 mlog_errno(status);
1249 goto out;
1250 }
1251
1252 /* Mark structure as allocated */
1253 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1254 &offset);
1255 if (status < 0) {
1256 mlog_errno(status);
1257 goto out;
1258 }
1259 out:
1260 up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1261 return status;
1262 }
1263
1264 /*
1265 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1266 * already started a transaction and written all changes to global quota file
1267 */
1268 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1269 {
1270 int status;
1271 int type = dquot->dq_type;
1272 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1273 struct super_block *sb = dquot->dq_sb;
1274 struct ocfs2_local_disk_chunk *dchunk;
1275 int offset;
1276
1277 status = ocfs2_journal_access_dq(handle,
1278 INODE_CACHE(sb_dqopt(sb)->files[type]),
1279 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1280 if (status < 0) {
1281 mlog_errno(status);
1282 goto out;
1283 }
1284 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1285 od->dq_local_off);
1286 dchunk = (struct ocfs2_local_disk_chunk *)
1287 (od->dq_chunk->qc_headerbh->b_data);
1288 /* Mark structure as freed */
1289 lock_buffer(od->dq_chunk->qc_headerbh);
1290 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1291 le32_add_cpu(&dchunk->dqc_free, 1);
1292 unlock_buffer(od->dq_chunk->qc_headerbh);
1293 ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1294
1295 out:
1296 /* Clear the read bit so that next time someone uses this
1297 * dquot he reads fresh info from disk and allocates local
1298 * dquot structure */
1299 clear_bit(DQ_READ_B, &dquot->dq_flags);
1300 return status;
1301 }
1302
1303 static const struct quota_format_ops ocfs2_format_ops = {
1304 .check_quota_file = ocfs2_local_check_quota_file,
1305 .read_file_info = ocfs2_local_read_info,
1306 .write_file_info = ocfs2_global_write_info,
1307 .free_file_info = ocfs2_local_free_info,
1308 };
1309
1310 struct quota_format_type ocfs2_quota_format = {
1311 .qf_fmt_id = QFMT_OCFS2,
1312 .qf_ops = &ocfs2_format_ops,
1313 .qf_owner = THIS_MODULE
1314 };
CRIS linux kernel tree