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ocfs2: avoid unaligned access to dqc_bitmap
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ocfs2 / quota_local.c
1 /*
2 * Implementation of operations over local quota file
3 */
4
5 #include <linux/fs.h>
6 #include <linux/slab.h>
7 #include <linux/quota.h>
8 #include <linux/quotaops.h>
9 #include <linux/module.h>
10
11 #include <cluster/masklog.h>
12
13 #include "ocfs2_fs.h"
14 #include "ocfs2.h"
15 #include "inode.h"
16 #include "alloc.h"
17 #include "file.h"
18 #include "buffer_head_io.h"
19 #include "journal.h"
20 #include "sysfile.h"
21 #include "dlmglue.h"
22 #include "quota.h"
23 #include "uptodate.h"
24 #include "super.h"
25 #include "ocfs2_trace.h"
26
27 /* Number of local quota structures per block */
28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
29 {
30 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
31 sizeof(struct ocfs2_local_disk_dqblk));
32 }
33
34 /* Number of blocks with entries in one chunk */
35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
36 {
37 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
38 OCFS2_QBLK_RESERVED_SPACE) << 3) /
39 ol_quota_entries_per_block(sb);
40 }
41
42 /* Number of entries in a chunk bitmap */
43 static unsigned int ol_chunk_entries(struct super_block *sb)
44 {
45 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
46 }
47
48 /* Offset of the chunk in quota file */
49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
50 {
51 /* 1 block for local quota file info, 1 block per chunk for chunk info */
52 return 1 + (ol_chunk_blocks(sb) + 1) * c;
53 }
54
55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
56 {
57 int epb = ol_quota_entries_per_block(sb);
58
59 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
60 }
61
62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
63 {
64 int epb = ol_quota_entries_per_block(sb);
65
66 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
67 }
68
69 /* Offset of the dquot structure in the quota file */
70 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
71 {
72 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
73 ol_dqblk_block_off(sb, c, off);
74 }
75
76 /* 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 printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
408 "slot %u\n", osb->dev_str, slot_num);
409
410 rec = ocfs2_alloc_quota_recovery();
411 if (!rec)
412 return ERR_PTR(-ENOMEM);
413 /* First init... */
414
415 for (type = 0; type < MAXQUOTAS; type++) {
416 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
417 continue;
418 /* At this point, journal of the slot is already replayed so
419 * we can trust metadata and data of the quota file */
420 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
421 if (!lqinode) {
422 status = -ENOENT;
423 goto out;
424 }
425 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
426 OCFS2_META_LOCK_RECOVERY);
427 if (status < 0) {
428 mlog_errno(status);
429 goto out_put;
430 }
431 /* Now read local header */
432 bh = NULL;
433 status = ocfs2_read_quota_block(lqinode, 0, &bh);
434 if (status) {
435 mlog_errno(status);
436 mlog(ML_ERROR, "failed to read quota file info header "
437 "(slot=%d type=%d)\n", slot_num, type);
438 goto out_lock;
439 }
440 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
441 OCFS2_LOCAL_INFO_OFF);
442 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
443 &rec->r_list[type]);
444 brelse(bh);
445 out_lock:
446 ocfs2_inode_unlock(lqinode, 1);
447 out_put:
448 iput(lqinode);
449 if (status < 0)
450 break;
451 }
452 out:
453 if (status < 0) {
454 ocfs2_free_quota_recovery(rec);
455 rec = ERR_PTR(status);
456 }
457 return rec;
458 }
459
460 /* Sync changes in local quota file into global quota file and
461 * reinitialize local quota file.
462 * The function expects local quota file to be already locked and
463 * dqonoff_mutex locked. */
464 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
465 int type,
466 struct ocfs2_quota_recovery *rec)
467 {
468 struct super_block *sb = lqinode->i_sb;
469 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
470 struct ocfs2_local_disk_chunk *dchunk;
471 struct ocfs2_local_disk_dqblk *dqblk;
472 struct dquot *dquot;
473 handle_t *handle;
474 struct buffer_head *hbh = NULL, *qbh = NULL;
475 int status = 0;
476 int bit, chunk;
477 struct ocfs2_recovery_chunk *rchunk, *next;
478 qsize_t spacechange, inodechange;
479
480 trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
481
482 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
483 chunk = rchunk->rc_chunk;
484 hbh = NULL;
485 status = ocfs2_read_quota_block(lqinode,
486 ol_quota_chunk_block(sb, chunk),
487 &hbh);
488 if (status) {
489 mlog_errno(status);
490 break;
491 }
492 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
493 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
494 qbh = NULL;
495 status = ocfs2_read_quota_block(lqinode,
496 ol_dqblk_block(sb, chunk, bit),
497 &qbh);
498 if (status) {
499 mlog_errno(status);
500 break;
501 }
502 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
503 ol_dqblk_block_off(sb, chunk, bit));
504 dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
505 if (!dquot) {
506 status = -EIO;
507 mlog(ML_ERROR, "Failed to get quota structure "
508 "for id %u, type %d. Cannot finish quota "
509 "file recovery.\n",
510 (unsigned)le64_to_cpu(dqblk->dqb_id),
511 type);
512 goto out_put_bh;
513 }
514 status = ocfs2_lock_global_qf(oinfo, 1);
515 if (status < 0) {
516 mlog_errno(status);
517 goto out_put_dquot;
518 }
519
520 handle = ocfs2_start_trans(OCFS2_SB(sb),
521 OCFS2_QSYNC_CREDITS);
522 if (IS_ERR(handle)) {
523 status = PTR_ERR(handle);
524 mlog_errno(status);
525 goto out_drop_lock;
526 }
527 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
528 spin_lock(&dq_data_lock);
529 /* Add usage from quota entry into quota changes
530 * of our node. Auxiliary variables are important
531 * due to signedness */
532 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
533 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
534 dquot->dq_dqb.dqb_curspace += spacechange;
535 dquot->dq_dqb.dqb_curinodes += inodechange;
536 spin_unlock(&dq_data_lock);
537 /* We want to drop reference held by the crashed
538 * node. Since we have our own reference we know
539 * global structure actually won't be freed. */
540 status = ocfs2_global_release_dquot(dquot);
541 if (status < 0) {
542 mlog_errno(status);
543 goto out_commit;
544 }
545 /* Release local quota file entry */
546 status = ocfs2_journal_access_dq(handle,
547 INODE_CACHE(lqinode),
548 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
549 if (status < 0) {
550 mlog_errno(status);
551 goto out_commit;
552 }
553 lock_buffer(qbh);
554 WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
555 ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
556 le32_add_cpu(&dchunk->dqc_free, 1);
557 unlock_buffer(qbh);
558 ocfs2_journal_dirty(handle, qbh);
559 out_commit:
560 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
561 ocfs2_commit_trans(OCFS2_SB(sb), handle);
562 out_drop_lock:
563 ocfs2_unlock_global_qf(oinfo, 1);
564 out_put_dquot:
565 dqput(dquot);
566 out_put_bh:
567 brelse(qbh);
568 if (status < 0)
569 break;
570 }
571 brelse(hbh);
572 list_del(&rchunk->rc_list);
573 kfree(rchunk->rc_bitmap);
574 kfree(rchunk);
575 if (status < 0)
576 break;
577 }
578 if (status < 0)
579 free_recovery_list(&(rec->r_list[type]));
580 if (status)
581 mlog_errno(status);
582 return status;
583 }
584
585 /* Recover local quota files for given node different from us */
586 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
587 struct ocfs2_quota_recovery *rec,
588 int slot_num)
589 {
590 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
591 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
592 struct super_block *sb = osb->sb;
593 struct ocfs2_local_disk_dqinfo *ldinfo;
594 struct buffer_head *bh;
595 handle_t *handle;
596 int type;
597 int status = 0;
598 struct inode *lqinode;
599 unsigned int flags;
600
601 printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
602 "slot %u\n", osb->dev_str, slot_num);
603
604 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
605 for (type = 0; type < MAXQUOTAS; type++) {
606 if (list_empty(&(rec->r_list[type])))
607 continue;
608 trace_ocfs2_finish_quota_recovery(slot_num);
609 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
610 if (!lqinode) {
611 status = -ENOENT;
612 goto out;
613 }
614 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
615 OCFS2_META_LOCK_NOQUEUE);
616 /* Someone else is holding the lock? Then he must be
617 * doing the recovery. Just skip the file... */
618 if (status == -EAGAIN) {
619 printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
620 "device (%s) for slot %d because quota file is "
621 "locked.\n", osb->dev_str, slot_num);
622 status = 0;
623 goto out_put;
624 } else if (status < 0) {
625 mlog_errno(status);
626 goto out_put;
627 }
628 /* Now read local header */
629 bh = NULL;
630 status = ocfs2_read_quota_block(lqinode, 0, &bh);
631 if (status) {
632 mlog_errno(status);
633 mlog(ML_ERROR, "failed to read quota file info header "
634 "(slot=%d type=%d)\n", slot_num, type);
635 goto out_lock;
636 }
637 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
638 OCFS2_LOCAL_INFO_OFF);
639 /* Is recovery still needed? */
640 flags = le32_to_cpu(ldinfo->dqi_flags);
641 if (!(flags & OLQF_CLEAN))
642 status = ocfs2_recover_local_quota_file(lqinode,
643 type,
644 rec);
645 /* We don't want to mark file as clean when it is actually
646 * active */
647 if (slot_num == osb->slot_num)
648 goto out_bh;
649 /* Mark quota file as clean if we are recovering quota file of
650 * some other node. */
651 handle = ocfs2_start_trans(osb,
652 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
653 if (IS_ERR(handle)) {
654 status = PTR_ERR(handle);
655 mlog_errno(status);
656 goto out_bh;
657 }
658 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
659 bh,
660 OCFS2_JOURNAL_ACCESS_WRITE);
661 if (status < 0) {
662 mlog_errno(status);
663 goto out_trans;
664 }
665 lock_buffer(bh);
666 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
667 unlock_buffer(bh);
668 ocfs2_journal_dirty(handle, bh);
669 out_trans:
670 ocfs2_commit_trans(osb, handle);
671 out_bh:
672 brelse(bh);
673 out_lock:
674 ocfs2_inode_unlock(lqinode, 1);
675 out_put:
676 iput(lqinode);
677 if (status < 0)
678 break;
679 }
680 out:
681 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
682 kfree(rec);
683 return status;
684 }
685
686 /* Read information header from quota file */
687 static int ocfs2_local_read_info(struct super_block *sb, int type)
688 {
689 struct ocfs2_local_disk_dqinfo *ldinfo;
690 struct mem_dqinfo *info = sb_dqinfo(sb, type);
691 struct ocfs2_mem_dqinfo *oinfo;
692 struct inode *lqinode = sb_dqopt(sb)->files[type];
693 int status;
694 struct buffer_head *bh = NULL;
695 struct ocfs2_quota_recovery *rec;
696 int locked = 0;
697
698 /* We don't need the lock and we have to acquire quota file locks
699 * which will later depend on this lock */
700 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
701 info->dqi_maxblimit = 0x7fffffffffffffffLL;
702 info->dqi_maxilimit = 0x7fffffffffffffffLL;
703 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
704 if (!oinfo) {
705 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
706 " info.");
707 goto out_err;
708 }
709 info->dqi_priv = oinfo;
710 oinfo->dqi_type = type;
711 INIT_LIST_HEAD(&oinfo->dqi_chunk);
712 oinfo->dqi_rec = NULL;
713 oinfo->dqi_lqi_bh = NULL;
714 oinfo->dqi_libh = NULL;
715
716 status = ocfs2_global_read_info(sb, type);
717 if (status < 0)
718 goto out_err;
719
720 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
721 if (status < 0) {
722 mlog_errno(status);
723 goto out_err;
724 }
725 locked = 1;
726
727 /* Now read local header */
728 status = ocfs2_read_quota_block(lqinode, 0, &bh);
729 if (status) {
730 mlog_errno(status);
731 mlog(ML_ERROR, "failed to read quota file info header "
732 "(type=%d)\n", type);
733 goto out_err;
734 }
735 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
736 OCFS2_LOCAL_INFO_OFF);
737 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
738 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
739 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
740 oinfo->dqi_libh = bh;
741
742 /* We crashed when using local quota file? */
743 if (!(info->dqi_flags & OLQF_CLEAN)) {
744 rec = OCFS2_SB(sb)->quota_rec;
745 if (!rec) {
746 rec = ocfs2_alloc_quota_recovery();
747 if (!rec) {
748 status = -ENOMEM;
749 mlog_errno(status);
750 goto out_err;
751 }
752 OCFS2_SB(sb)->quota_rec = rec;
753 }
754
755 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
756 &rec->r_list[type]);
757 if (status < 0) {
758 mlog_errno(status);
759 goto out_err;
760 }
761 }
762
763 status = ocfs2_load_local_quota_bitmaps(lqinode,
764 ldinfo,
765 &oinfo->dqi_chunk);
766 if (status < 0) {
767 mlog_errno(status);
768 goto out_err;
769 }
770
771 /* Now mark quota file as used */
772 info->dqi_flags &= ~OLQF_CLEAN;
773 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
774 if (status < 0) {
775 mlog_errno(status);
776 goto out_err;
777 }
778
779 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
780 return 0;
781 out_err:
782 if (oinfo) {
783 iput(oinfo->dqi_gqinode);
784 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
785 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
786 brelse(oinfo->dqi_lqi_bh);
787 if (locked)
788 ocfs2_inode_unlock(lqinode, 1);
789 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
790 kfree(oinfo);
791 }
792 brelse(bh);
793 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
794 return -1;
795 }
796
797 /* Write local info to quota file */
798 static int ocfs2_local_write_info(struct super_block *sb, int type)
799 {
800 struct mem_dqinfo *info = sb_dqinfo(sb, type);
801 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
802 ->dqi_libh;
803 int status;
804
805 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
806 info);
807 if (status < 0) {
808 mlog_errno(status);
809 return -1;
810 }
811
812 return 0;
813 }
814
815 /* Release info from memory */
816 static int ocfs2_local_free_info(struct super_block *sb, int type)
817 {
818 struct mem_dqinfo *info = sb_dqinfo(sb, type);
819 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
820 struct ocfs2_quota_chunk *chunk;
821 struct ocfs2_local_disk_chunk *dchunk;
822 int mark_clean = 1, len;
823 int status;
824
825 iput(oinfo->dqi_gqinode);
826 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
827 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
828 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
829 dchunk = (struct ocfs2_local_disk_chunk *)
830 (chunk->qc_headerbh->b_data);
831 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
832 len = ol_chunk_entries(sb);
833 } else {
834 len = (oinfo->dqi_blocks -
835 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
836 * ol_quota_entries_per_block(sb);
837 }
838 /* Not all entries free? Bug! */
839 if (le32_to_cpu(dchunk->dqc_free) != len) {
840 mlog(ML_ERROR, "releasing quota file with used "
841 "entries (type=%d)\n", type);
842 mark_clean = 0;
843 }
844 }
845 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
846
847 /* dqonoff_mutex protects us against racing with recovery thread... */
848 if (oinfo->dqi_rec) {
849 ocfs2_free_quota_recovery(oinfo->dqi_rec);
850 mark_clean = 0;
851 }
852
853 if (!mark_clean)
854 goto out;
855
856 /* Mark local file as clean */
857 info->dqi_flags |= OLQF_CLEAN;
858 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
859 oinfo->dqi_libh,
860 olq_update_info,
861 info);
862 if (status < 0) {
863 mlog_errno(status);
864 goto out;
865 }
866
867 out:
868 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
869 brelse(oinfo->dqi_libh);
870 brelse(oinfo->dqi_lqi_bh);
871 kfree(oinfo);
872 return 0;
873 }
874
875 static void olq_set_dquot(struct buffer_head *bh, void *private)
876 {
877 struct ocfs2_dquot *od = private;
878 struct ocfs2_local_disk_dqblk *dqblk;
879 struct super_block *sb = od->dq_dquot.dq_sb;
880
881 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
882 + ol_dqblk_block_offset(sb, od->dq_local_off));
883
884 dqblk->dqb_id = cpu_to_le64(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 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_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 lqinode->i_size + 2 * sb->s_blocksize,
983 lqinode->i_size);
984 if (status < 0) {
985 mlog_errno(status);
986 goto out;
987 }
988 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
989 lqinode->i_size + 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 lqinode->i_size + sb->s_blocksize,
1126 lqinode->i_size);
1127 if (status < 0) {
1128 mlog_errno(status);
1129 goto out;
1130 }
1131 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1132 lqinode->i_size + 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_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_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 /* Clear the read bit so that next time someone uses this
1304 * dquot he reads fresh info from disk and allocates local
1305 * dquot structure */
1306 clear_bit(DQ_READ_B, &dquot->dq_flags);
1307 return status;
1308 }
1309
1310 static const struct quota_format_ops ocfs2_format_ops = {
1311 .check_quota_file = ocfs2_local_check_quota_file,
1312 .read_file_info = ocfs2_local_read_info,
1313 .write_file_info = ocfs2_global_write_info,
1314 .free_file_info = ocfs2_local_free_info,
1315 };
1316
1317 struct quota_format_type ocfs2_quota_format = {
1318 .qf_fmt_id = QFMT_OCFS2,
1319 .qf_ops = &ocfs2_format_ops,
1320 .qf_owner = THIS_MODULE
1321 };
kernel source for telekom puls (alcatel/mediatek)