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MAINTAINERS: Update amd-iommu F: patterns
[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 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 trace_ocfs2_recover_local_quota_file((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 if (status)
579 mlog_errno(status);
580 return status;
581 }
582
583 /* Recover local quota files for given node different from us */
584 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
585 struct ocfs2_quota_recovery *rec,
586 int slot_num)
587 {
588 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
589 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
590 struct super_block *sb = osb->sb;
591 struct ocfs2_local_disk_dqinfo *ldinfo;
592 struct buffer_head *bh;
593 handle_t *handle;
594 int type;
595 int status = 0;
596 struct inode *lqinode;
597 unsigned int flags;
598
599 mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
600 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
601 for (type = 0; type < MAXQUOTAS; type++) {
602 if (list_empty(&(rec->r_list[type])))
603 continue;
604 trace_ocfs2_finish_quota_recovery(slot_num);
605 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
606 if (!lqinode) {
607 status = -ENOENT;
608 goto out;
609 }
610 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
611 OCFS2_META_LOCK_NOQUEUE);
612 /* Someone else is holding the lock? Then he must be
613 * doing the recovery. Just skip the file... */
614 if (status == -EAGAIN) {
615 mlog(ML_NOTICE, "skipping quota recovery for slot %d "
616 "because quota file is locked.\n", slot_num);
617 status = 0;
618 goto out_put;
619 } else if (status < 0) {
620 mlog_errno(status);
621 goto out_put;
622 }
623 /* Now read local header */
624 bh = NULL;
625 status = ocfs2_read_quota_block(lqinode, 0, &bh);
626 if (status) {
627 mlog_errno(status);
628 mlog(ML_ERROR, "failed to read quota file info header "
629 "(slot=%d type=%d)\n", slot_num, type);
630 goto out_lock;
631 }
632 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
633 OCFS2_LOCAL_INFO_OFF);
634 /* Is recovery still needed? */
635 flags = le32_to_cpu(ldinfo->dqi_flags);
636 if (!(flags & OLQF_CLEAN))
637 status = ocfs2_recover_local_quota_file(lqinode,
638 type,
639 rec);
640 /* We don't want to mark file as clean when it is actually
641 * active */
642 if (slot_num == osb->slot_num)
643 goto out_bh;
644 /* Mark quota file as clean if we are recovering quota file of
645 * some other node. */
646 handle = ocfs2_start_trans(osb,
647 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
648 if (IS_ERR(handle)) {
649 status = PTR_ERR(handle);
650 mlog_errno(status);
651 goto out_bh;
652 }
653 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
654 bh,
655 OCFS2_JOURNAL_ACCESS_WRITE);
656 if (status < 0) {
657 mlog_errno(status);
658 goto out_trans;
659 }
660 lock_buffer(bh);
661 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
662 unlock_buffer(bh);
663 ocfs2_journal_dirty(handle, bh);
664 out_trans:
665 ocfs2_commit_trans(osb, handle);
666 out_bh:
667 brelse(bh);
668 out_lock:
669 ocfs2_inode_unlock(lqinode, 1);
670 out_put:
671 iput(lqinode);
672 if (status < 0)
673 break;
674 }
675 out:
676 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
677 kfree(rec);
678 return status;
679 }
680
681 /* Read information header from quota file */
682 static int ocfs2_local_read_info(struct super_block *sb, int type)
683 {
684 struct ocfs2_local_disk_dqinfo *ldinfo;
685 struct mem_dqinfo *info = sb_dqinfo(sb, type);
686 struct ocfs2_mem_dqinfo *oinfo;
687 struct inode *lqinode = sb_dqopt(sb)->files[type];
688 int status;
689 struct buffer_head *bh = NULL;
690 struct ocfs2_quota_recovery *rec;
691 int locked = 0;
692
693 /* We don't need the lock and we have to acquire quota file locks
694 * which will later depend on this lock */
695 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
696 info->dqi_maxblimit = 0x7fffffffffffffffLL;
697 info->dqi_maxilimit = 0x7fffffffffffffffLL;
698 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
699 if (!oinfo) {
700 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
701 " info.");
702 goto out_err;
703 }
704 info->dqi_priv = oinfo;
705 oinfo->dqi_type = type;
706 INIT_LIST_HEAD(&oinfo->dqi_chunk);
707 oinfo->dqi_rec = NULL;
708 oinfo->dqi_lqi_bh = NULL;
709 oinfo->dqi_libh = NULL;
710
711 status = ocfs2_global_read_info(sb, type);
712 if (status < 0)
713 goto out_err;
714
715 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
716 if (status < 0) {
717 mlog_errno(status);
718 goto out_err;
719 }
720 locked = 1;
721
722 /* Now read local header */
723 status = ocfs2_read_quota_block(lqinode, 0, &bh);
724 if (status) {
725 mlog_errno(status);
726 mlog(ML_ERROR, "failed to read quota file info header "
727 "(type=%d)\n", type);
728 goto out_err;
729 }
730 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
731 OCFS2_LOCAL_INFO_OFF);
732 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
733 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
734 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
735 oinfo->dqi_libh = bh;
736
737 /* We crashed when using local quota file? */
738 if (!(info->dqi_flags & OLQF_CLEAN)) {
739 rec = OCFS2_SB(sb)->quota_rec;
740 if (!rec) {
741 rec = ocfs2_alloc_quota_recovery();
742 if (!rec) {
743 status = -ENOMEM;
744 mlog_errno(status);
745 goto out_err;
746 }
747 OCFS2_SB(sb)->quota_rec = rec;
748 }
749
750 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
751 &rec->r_list[type]);
752 if (status < 0) {
753 mlog_errno(status);
754 goto out_err;
755 }
756 }
757
758 status = ocfs2_load_local_quota_bitmaps(lqinode,
759 ldinfo,
760 &oinfo->dqi_chunk);
761 if (status < 0) {
762 mlog_errno(status);
763 goto out_err;
764 }
765
766 /* Now mark quota file as used */
767 info->dqi_flags &= ~OLQF_CLEAN;
768 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
769 if (status < 0) {
770 mlog_errno(status);
771 goto out_err;
772 }
773
774 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
775 return 0;
776 out_err:
777 if (oinfo) {
778 iput(oinfo->dqi_gqinode);
779 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
780 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
781 brelse(oinfo->dqi_lqi_bh);
782 if (locked)
783 ocfs2_inode_unlock(lqinode, 1);
784 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
785 kfree(oinfo);
786 }
787 brelse(bh);
788 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
789 return -1;
790 }
791
792 /* Write local info to quota file */
793 static int ocfs2_local_write_info(struct super_block *sb, int type)
794 {
795 struct mem_dqinfo *info = sb_dqinfo(sb, type);
796 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
797 ->dqi_libh;
798 int status;
799
800 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
801 info);
802 if (status < 0) {
803 mlog_errno(status);
804 return -1;
805 }
806
807 return 0;
808 }
809
810 /* Release info from memory */
811 static int ocfs2_local_free_info(struct super_block *sb, int type)
812 {
813 struct mem_dqinfo *info = sb_dqinfo(sb, type);
814 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
815 struct ocfs2_quota_chunk *chunk;
816 struct ocfs2_local_disk_chunk *dchunk;
817 int mark_clean = 1, len;
818 int status;
819
820 iput(oinfo->dqi_gqinode);
821 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
822 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
823 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
824 dchunk = (struct ocfs2_local_disk_chunk *)
825 (chunk->qc_headerbh->b_data);
826 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
827 len = ol_chunk_entries(sb);
828 } else {
829 len = (oinfo->dqi_blocks -
830 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
831 * ol_quota_entries_per_block(sb);
832 }
833 /* Not all entries free? Bug! */
834 if (le32_to_cpu(dchunk->dqc_free) != len) {
835 mlog(ML_ERROR, "releasing quota file with used "
836 "entries (type=%d)\n", type);
837 mark_clean = 0;
838 }
839 }
840 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
841
842 /* dqonoff_mutex protects us against racing with recovery thread... */
843 if (oinfo->dqi_rec) {
844 ocfs2_free_quota_recovery(oinfo->dqi_rec);
845 mark_clean = 0;
846 }
847
848 if (!mark_clean)
849 goto out;
850
851 /* Mark local file as clean */
852 info->dqi_flags |= OLQF_CLEAN;
853 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
854 oinfo->dqi_libh,
855 olq_update_info,
856 info);
857 if (status < 0) {
858 mlog_errno(status);
859 goto out;
860 }
861
862 out:
863 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
864 brelse(oinfo->dqi_libh);
865 brelse(oinfo->dqi_lqi_bh);
866 kfree(oinfo);
867 return 0;
868 }
869
870 static void olq_set_dquot(struct buffer_head *bh, void *private)
871 {
872 struct ocfs2_dquot *od = private;
873 struct ocfs2_local_disk_dqblk *dqblk;
874 struct super_block *sb = od->dq_dquot.dq_sb;
875
876 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
877 + ol_dqblk_block_offset(sb, od->dq_local_off));
878
879 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
880 spin_lock(&dq_data_lock);
881 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
882 od->dq_origspace);
883 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
884 od->dq_originodes);
885 spin_unlock(&dq_data_lock);
886 trace_olq_set_dquot(
887 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
888 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
889 od->dq_dquot.dq_id);
890 }
891
892 /* Write dquot to local quota file */
893 int ocfs2_local_write_dquot(struct dquot *dquot)
894 {
895 struct super_block *sb = dquot->dq_sb;
896 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
897 struct buffer_head *bh;
898 struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
899 int status;
900
901 status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
902 &bh);
903 if (status) {
904 mlog_errno(status);
905 goto out;
906 }
907 status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
908 if (status < 0) {
909 mlog_errno(status);
910 goto out;
911 }
912 out:
913 brelse(bh);
914 return status;
915 }
916
917 /* Find free entry in local quota file */
918 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
919 int type,
920 int *offset)
921 {
922 struct mem_dqinfo *info = sb_dqinfo(sb, type);
923 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
924 struct ocfs2_quota_chunk *chunk;
925 struct ocfs2_local_disk_chunk *dchunk;
926 int found = 0, len;
927
928 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
929 dchunk = (struct ocfs2_local_disk_chunk *)
930 chunk->qc_headerbh->b_data;
931 if (le32_to_cpu(dchunk->dqc_free) > 0) {
932 found = 1;
933 break;
934 }
935 }
936 if (!found)
937 return NULL;
938
939 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
940 len = ol_chunk_entries(sb);
941 } else {
942 len = (oinfo->dqi_blocks -
943 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
944 * ol_quota_entries_per_block(sb);
945 }
946
947 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
948 /* We failed? */
949 if (found == len) {
950 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
951 " entries free (type=%d)\n", chunk->qc_num,
952 le32_to_cpu(dchunk->dqc_free), type);
953 return ERR_PTR(-EIO);
954 }
955 *offset = found;
956 return chunk;
957 }
958
959 /* Add new chunk to the local quota file */
960 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
961 struct super_block *sb,
962 int type,
963 int *offset)
964 {
965 struct mem_dqinfo *info = sb_dqinfo(sb, type);
966 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
967 struct inode *lqinode = sb_dqopt(sb)->files[type];
968 struct ocfs2_quota_chunk *chunk = NULL;
969 struct ocfs2_local_disk_chunk *dchunk;
970 int status;
971 handle_t *handle;
972 struct buffer_head *bh = NULL, *dbh = NULL;
973 u64 p_blkno;
974
975 /* We are protected by dqio_sem so no locking needed */
976 status = ocfs2_extend_no_holes(lqinode, NULL,
977 lqinode->i_size + 2 * sb->s_blocksize,
978 lqinode->i_size);
979 if (status < 0) {
980 mlog_errno(status);
981 goto out;
982 }
983 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
984 lqinode->i_size + 2 * sb->s_blocksize);
985 if (status < 0) {
986 mlog_errno(status);
987 goto out;
988 }
989
990 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
991 if (!chunk) {
992 status = -ENOMEM;
993 mlog_errno(status);
994 goto out;
995 }
996 /* Local quota info and two new blocks we initialize */
997 handle = ocfs2_start_trans(OCFS2_SB(sb),
998 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
999 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1000 if (IS_ERR(handle)) {
1001 status = PTR_ERR(handle);
1002 mlog_errno(status);
1003 goto out;
1004 }
1005
1006 /* Initialize chunk header */
1007 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1008 &p_blkno, NULL, NULL);
1009 if (status < 0) {
1010 mlog_errno(status);
1011 goto out_trans;
1012 }
1013 bh = sb_getblk(sb, p_blkno);
1014 if (!bh) {
1015 status = -ENOMEM;
1016 mlog_errno(status);
1017 goto out_trans;
1018 }
1019 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1020 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1021 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1022 OCFS2_JOURNAL_ACCESS_CREATE);
1023 if (status < 0) {
1024 mlog_errno(status);
1025 goto out_trans;
1026 }
1027 lock_buffer(bh);
1028 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1029 memset(dchunk->dqc_bitmap, 0,
1030 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1031 OCFS2_QBLK_RESERVED_SPACE);
1032 unlock_buffer(bh);
1033 ocfs2_journal_dirty(handle, bh);
1034
1035 /* Initialize new block with structures */
1036 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1037 &p_blkno, NULL, NULL);
1038 if (status < 0) {
1039 mlog_errno(status);
1040 goto out_trans;
1041 }
1042 dbh = sb_getblk(sb, p_blkno);
1043 if (!dbh) {
1044 status = -ENOMEM;
1045 mlog_errno(status);
1046 goto out_trans;
1047 }
1048 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1049 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1050 OCFS2_JOURNAL_ACCESS_CREATE);
1051 if (status < 0) {
1052 mlog_errno(status);
1053 goto out_trans;
1054 }
1055 lock_buffer(dbh);
1056 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1057 unlock_buffer(dbh);
1058 ocfs2_journal_dirty(handle, dbh);
1059
1060 /* Update local quotafile info */
1061 oinfo->dqi_blocks += 2;
1062 oinfo->dqi_chunks++;
1063 status = ocfs2_local_write_info(sb, type);
1064 if (status < 0) {
1065 mlog_errno(status);
1066 goto out_trans;
1067 }
1068 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1069 if (status < 0) {
1070 mlog_errno(status);
1071 goto out;
1072 }
1073
1074 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1075 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1076 struct ocfs2_quota_chunk,
1077 qc_chunk)->qc_num + 1;
1078 chunk->qc_headerbh = bh;
1079 *offset = 0;
1080 return chunk;
1081 out_trans:
1082 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1083 out:
1084 brelse(bh);
1085 brelse(dbh);
1086 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1087 return ERR_PTR(status);
1088 }
1089
1090 /* Find free entry in local quota file */
1091 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1092 struct super_block *sb,
1093 int type,
1094 int *offset)
1095 {
1096 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1097 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1098 struct ocfs2_quota_chunk *chunk;
1099 struct inode *lqinode = sb_dqopt(sb)->files[type];
1100 struct ocfs2_local_disk_chunk *dchunk;
1101 int epb = ol_quota_entries_per_block(sb);
1102 unsigned int chunk_blocks;
1103 struct buffer_head *bh;
1104 u64 p_blkno;
1105 int status;
1106 handle_t *handle;
1107
1108 if (list_empty(&oinfo->dqi_chunk))
1109 return ocfs2_local_quota_add_chunk(sb, type, offset);
1110 /* Is the last chunk full? */
1111 chunk = list_entry(oinfo->dqi_chunk.prev,
1112 struct ocfs2_quota_chunk, qc_chunk);
1113 chunk_blocks = oinfo->dqi_blocks -
1114 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1115 if (ol_chunk_blocks(sb) == chunk_blocks)
1116 return ocfs2_local_quota_add_chunk(sb, type, offset);
1117
1118 /* We are protected by dqio_sem so no locking needed */
1119 status = ocfs2_extend_no_holes(lqinode, NULL,
1120 lqinode->i_size + sb->s_blocksize,
1121 lqinode->i_size);
1122 if (status < 0) {
1123 mlog_errno(status);
1124 goto out;
1125 }
1126 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1127 lqinode->i_size + sb->s_blocksize);
1128 if (status < 0) {
1129 mlog_errno(status);
1130 goto out;
1131 }
1132
1133 /* Get buffer from the just added block */
1134 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1135 &p_blkno, NULL, NULL);
1136 if (status < 0) {
1137 mlog_errno(status);
1138 goto out;
1139 }
1140 bh = sb_getblk(sb, p_blkno);
1141 if (!bh) {
1142 status = -ENOMEM;
1143 mlog_errno(status);
1144 goto out;
1145 }
1146 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1147
1148 /* Local quota info, chunk header and the new block we initialize */
1149 handle = ocfs2_start_trans(OCFS2_SB(sb),
1150 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1151 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1152 if (IS_ERR(handle)) {
1153 status = PTR_ERR(handle);
1154 mlog_errno(status);
1155 goto out;
1156 }
1157 /* Zero created block */
1158 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1159 OCFS2_JOURNAL_ACCESS_CREATE);
1160 if (status < 0) {
1161 mlog_errno(status);
1162 goto out_trans;
1163 }
1164 lock_buffer(bh);
1165 memset(bh->b_data, 0, sb->s_blocksize);
1166 unlock_buffer(bh);
1167 ocfs2_journal_dirty(handle, bh);
1168
1169 /* Update chunk header */
1170 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1171 chunk->qc_headerbh,
1172 OCFS2_JOURNAL_ACCESS_WRITE);
1173 if (status < 0) {
1174 mlog_errno(status);
1175 goto out_trans;
1176 }
1177
1178 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1179 lock_buffer(chunk->qc_headerbh);
1180 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1181 unlock_buffer(chunk->qc_headerbh);
1182 ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1183
1184 /* Update file header */
1185 oinfo->dqi_blocks++;
1186 status = ocfs2_local_write_info(sb, type);
1187 if (status < 0) {
1188 mlog_errno(status);
1189 goto out_trans;
1190 }
1191
1192 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1193 if (status < 0) {
1194 mlog_errno(status);
1195 goto out;
1196 }
1197 *offset = chunk_blocks * epb;
1198 return chunk;
1199 out_trans:
1200 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1201 out:
1202 return ERR_PTR(status);
1203 }
1204
1205 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1206 {
1207 int *offset = private;
1208 struct ocfs2_local_disk_chunk *dchunk;
1209
1210 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1211 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1212 le32_add_cpu(&dchunk->dqc_free, -1);
1213 }
1214
1215 /* Create dquot in the local file for given id */
1216 int ocfs2_create_local_dquot(struct dquot *dquot)
1217 {
1218 struct super_block *sb = dquot->dq_sb;
1219 int type = dquot->dq_type;
1220 struct inode *lqinode = sb_dqopt(sb)->files[type];
1221 struct ocfs2_quota_chunk *chunk;
1222 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1223 int offset;
1224 int status;
1225 u64 pcount;
1226
1227 down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1228 chunk = ocfs2_find_free_entry(sb, type, &offset);
1229 if (!chunk) {
1230 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1231 if (IS_ERR(chunk)) {
1232 status = PTR_ERR(chunk);
1233 goto out;
1234 }
1235 } else if (IS_ERR(chunk)) {
1236 status = PTR_ERR(chunk);
1237 goto out;
1238 }
1239 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1240 od->dq_chunk = chunk;
1241 status = ocfs2_extent_map_get_blocks(lqinode,
1242 ol_dqblk_block(sb, chunk->qc_num, offset),
1243 &od->dq_local_phys_blk,
1244 &pcount,
1245 NULL);
1246
1247 /* Initialize dquot structure on disk */
1248 status = ocfs2_local_write_dquot(dquot);
1249 if (status < 0) {
1250 mlog_errno(status);
1251 goto out;
1252 }
1253
1254 /* Mark structure as allocated */
1255 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1256 &offset);
1257 if (status < 0) {
1258 mlog_errno(status);
1259 goto out;
1260 }
1261 out:
1262 up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1263 return status;
1264 }
1265
1266 /*
1267 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1268 * already started a transaction and written all changes to global quota file
1269 */
1270 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1271 {
1272 int status;
1273 int type = dquot->dq_type;
1274 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1275 struct super_block *sb = dquot->dq_sb;
1276 struct ocfs2_local_disk_chunk *dchunk;
1277 int offset;
1278
1279 status = ocfs2_journal_access_dq(handle,
1280 INODE_CACHE(sb_dqopt(sb)->files[type]),
1281 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1282 if (status < 0) {
1283 mlog_errno(status);
1284 goto out;
1285 }
1286 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1287 od->dq_local_off);
1288 dchunk = (struct ocfs2_local_disk_chunk *)
1289 (od->dq_chunk->qc_headerbh->b_data);
1290 /* Mark structure as freed */
1291 lock_buffer(od->dq_chunk->qc_headerbh);
1292 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1293 le32_add_cpu(&dchunk->dqc_free, 1);
1294 unlock_buffer(od->dq_chunk->qc_headerbh);
1295 ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1296
1297 out:
1298 /* Clear the read bit so that next time someone uses this
1299 * dquot he reads fresh info from disk and allocates local
1300 * dquot structure */
1301 clear_bit(DQ_READ_B, &dquot->dq_flags);
1302 return status;
1303 }
1304
1305 static const struct quota_format_ops ocfs2_format_ops = {
1306 .check_quota_file = ocfs2_local_check_quota_file,
1307 .read_file_info = ocfs2_local_read_info,
1308 .write_file_info = ocfs2_global_write_info,
1309 .free_file_info = ocfs2_local_free_info,
1310 };
1311
1312 struct quota_format_type ocfs2_quota_format = {
1313 .qf_fmt_id = QFMT_OCFS2,
1314 .qf_ops = &ocfs2_format_ops,
1315 .qf_owner = THIS_MODULE
1316 };
kernel source for telekom puls (alcatel/mediatek)