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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.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 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
77 {
78 return off & ((1 << sb->s_blocksize_bits) - 1);
79 }
80
81 /* Compute offset in the chunk of a structure with the given offset */
82 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
83 {
84 int epb = ol_quota_entries_per_block(sb);
85
86 return ((off >> sb->s_blocksize_bits) -
87 ol_quota_chunk_block(sb, c) - 1) * epb
88 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
89 sizeof(struct ocfs2_local_disk_dqblk);
90 }
91
92 /* Write bufferhead into the fs */
93 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
94 void (*modify)(struct buffer_head *, void *), void *private)
95 {
96 struct super_block *sb = inode->i_sb;
97 handle_t *handle;
98 int status;
99
100 handle = ocfs2_start_trans(OCFS2_SB(sb),
101 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
102 if (IS_ERR(handle)) {
103 status = PTR_ERR(handle);
104 mlog_errno(status);
105 return status;
106 }
107 status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
108 OCFS2_JOURNAL_ACCESS_WRITE);
109 if (status < 0) {
110 mlog_errno(status);
111 ocfs2_commit_trans(OCFS2_SB(sb), handle);
112 return status;
113 }
114 lock_buffer(bh);
115 modify(bh, private);
116 unlock_buffer(bh);
117 ocfs2_journal_dirty(handle, bh);
118
119 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
120 if (status < 0) {
121 mlog_errno(status);
122 return status;
123 }
124 return 0;
125 }
126
127 /*
128 * Read quota block from a given logical offset.
129 *
130 * This function acquires ip_alloc_sem and thus it must not be called with a
131 * transaction started.
132 */
133 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
134 struct buffer_head **bh)
135 {
136 int rc = 0;
137 struct buffer_head *tmp = *bh;
138
139 if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
140 ocfs2_error(inode->i_sb,
141 "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
142 (unsigned long long)OCFS2_I(inode)->ip_blkno,
143 (unsigned long long)v_block,
144 (unsigned long long)i_size_read(inode));
145 return -EIO;
146 }
147 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
148 ocfs2_validate_quota_block);
149 if (rc)
150 mlog_errno(rc);
151
152 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
153 if (!rc && !*bh)
154 *bh = tmp;
155
156 return rc;
157 }
158
159 /* Check whether we understand format of quota files */
160 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
161 {
162 unsigned int lmagics[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
163 unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
164 unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
165 unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
166 unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
167 GROUP_QUOTA_SYSTEM_INODE };
168 struct buffer_head *bh = NULL;
169 struct inode *linode = sb_dqopt(sb)->files[type];
170 struct inode *ginode = NULL;
171 struct ocfs2_disk_dqheader *dqhead;
172 int status, ret = 0;
173
174 /* First check whether we understand local quota file */
175 status = ocfs2_read_quota_block(linode, 0, &bh);
176 if (status) {
177 mlog_errno(status);
178 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
179 type);
180 goto out_err;
181 }
182 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
183 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
184 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
185 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
186 lmagics[type], type);
187 goto out_err;
188 }
189 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
190 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
191 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
192 lversions[type], type);
193 goto out_err;
194 }
195 brelse(bh);
196 bh = NULL;
197
198 /* Next check whether we understand global quota file */
199 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
200 OCFS2_INVALID_SLOT);
201 if (!ginode) {
202 mlog(ML_ERROR, "cannot get global quota file inode "
203 "(type=%d)\n", type);
204 goto out_err;
205 }
206 /* Since the header is read only, we don't care about locking */
207 status = ocfs2_read_quota_block(ginode, 0, &bh);
208 if (status) {
209 mlog_errno(status);
210 mlog(ML_ERROR, "failed to read global quota file header "
211 "(type=%d)\n", type);
212 goto out_err;
213 }
214 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
215 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
216 mlog(ML_ERROR, "global quota file magic does not match "
217 "(%u != %u), type=%d\n",
218 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
219 goto out_err;
220 }
221 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
222 mlog(ML_ERROR, "global quota file version does not match "
223 "(%u != %u), type=%d\n",
224 le32_to_cpu(dqhead->dqh_version), gversions[type],
225 type);
226 goto out_err;
227 }
228
229 ret = 1;
230 out_err:
231 brelse(bh);
232 iput(ginode);
233 return ret;
234 }
235
236 /* Release given list of quota file chunks */
237 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
238 {
239 struct ocfs2_quota_chunk *pos, *next;
240
241 list_for_each_entry_safe(pos, next, head, qc_chunk) {
242 list_del(&pos->qc_chunk);
243 brelse(pos->qc_headerbh);
244 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
245 }
246 }
247
248 /* Load quota bitmaps into memory */
249 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
250 struct ocfs2_local_disk_dqinfo *ldinfo,
251 struct list_head *head)
252 {
253 struct ocfs2_quota_chunk *newchunk;
254 int i, status;
255
256 INIT_LIST_HEAD(head);
257 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
258 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
259 if (!newchunk) {
260 ocfs2_release_local_quota_bitmaps(head);
261 return -ENOMEM;
262 }
263 newchunk->qc_num = i;
264 newchunk->qc_headerbh = NULL;
265 status = ocfs2_read_quota_block(inode,
266 ol_quota_chunk_block(inode->i_sb, i),
267 &newchunk->qc_headerbh);
268 if (status) {
269 mlog_errno(status);
270 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
271 ocfs2_release_local_quota_bitmaps(head);
272 return status;
273 }
274 list_add_tail(&newchunk->qc_chunk, head);
275 }
276 return 0;
277 }
278
279 static void olq_update_info(struct buffer_head *bh, void *private)
280 {
281 struct mem_dqinfo *info = private;
282 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
283 struct ocfs2_local_disk_dqinfo *ldinfo;
284
285 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
286 OCFS2_LOCAL_INFO_OFF);
287 spin_lock(&dq_data_lock);
288 ldinfo->dqi_flags = cpu_to_le32(oinfo->dqi_flags);
289 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
290 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
291 spin_unlock(&dq_data_lock);
292 }
293
294 static int ocfs2_add_recovery_chunk(struct super_block *sb,
295 struct ocfs2_local_disk_chunk *dchunk,
296 int chunk,
297 struct list_head *head)
298 {
299 struct ocfs2_recovery_chunk *rc;
300
301 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
302 if (!rc)
303 return -ENOMEM;
304 rc->rc_chunk = chunk;
305 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
306 if (!rc->rc_bitmap) {
307 kfree(rc);
308 return -ENOMEM;
309 }
310 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
311 (ol_chunk_entries(sb) + 7) >> 3);
312 list_add_tail(&rc->rc_list, head);
313 return 0;
314 }
315
316 static void free_recovery_list(struct list_head *head)
317 {
318 struct ocfs2_recovery_chunk *next;
319 struct ocfs2_recovery_chunk *rchunk;
320
321 list_for_each_entry_safe(rchunk, next, head, rc_list) {
322 list_del(&rchunk->rc_list);
323 kfree(rchunk->rc_bitmap);
324 kfree(rchunk);
325 }
326 }
327
328 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
329 {
330 int type;
331
332 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
333 free_recovery_list(&(rec->r_list[type]));
334 kfree(rec);
335 }
336
337 /* Load entries in our quota file we have to recover*/
338 static int ocfs2_recovery_load_quota(struct inode *lqinode,
339 struct ocfs2_local_disk_dqinfo *ldinfo,
340 int type,
341 struct list_head *head)
342 {
343 struct super_block *sb = lqinode->i_sb;
344 struct buffer_head *hbh;
345 struct ocfs2_local_disk_chunk *dchunk;
346 int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
347 int status = 0;
348
349 for (i = 0; i < chunks; i++) {
350 hbh = NULL;
351 status = ocfs2_read_quota_block(lqinode,
352 ol_quota_chunk_block(sb, i),
353 &hbh);
354 if (status) {
355 mlog_errno(status);
356 break;
357 }
358 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
359 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
360 status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
361 brelse(hbh);
362 if (status < 0)
363 break;
364 }
365 if (status < 0)
366 free_recovery_list(head);
367 return status;
368 }
369
370 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
371 {
372 int type;
373 struct ocfs2_quota_recovery *rec;
374
375 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
376 if (!rec)
377 return NULL;
378 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
379 INIT_LIST_HEAD(&(rec->r_list[type]));
380 return rec;
381 }
382
383 /* Load information we need for quota recovery into memory */
384 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
385 struct ocfs2_super *osb,
386 int slot_num)
387 {
388 unsigned int feature[OCFS2_MAXQUOTAS] = {
389 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
390 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
391 unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
392 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
393 struct super_block *sb = osb->sb;
394 struct ocfs2_local_disk_dqinfo *ldinfo;
395 struct inode *lqinode;
396 struct buffer_head *bh;
397 int type;
398 int status = 0;
399 struct ocfs2_quota_recovery *rec;
400
401 printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
402 "slot %u\n", osb->dev_str, slot_num);
403
404 rec = ocfs2_alloc_quota_recovery();
405 if (!rec)
406 return ERR_PTR(-ENOMEM);
407 /* First init... */
408
409 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
410 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
411 continue;
412 /* At this point, journal of the slot is already replayed so
413 * we can trust metadata and data of the quota file */
414 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
415 if (!lqinode) {
416 status = -ENOENT;
417 goto out;
418 }
419 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
420 OCFS2_META_LOCK_RECOVERY);
421 if (status < 0) {
422 mlog_errno(status);
423 goto out_put;
424 }
425 /* Now read local header */
426 bh = NULL;
427 status = ocfs2_read_quota_block(lqinode, 0, &bh);
428 if (status) {
429 mlog_errno(status);
430 mlog(ML_ERROR, "failed to read quota file info header "
431 "(slot=%d type=%d)\n", slot_num, type);
432 goto out_lock;
433 }
434 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
435 OCFS2_LOCAL_INFO_OFF);
436 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
437 &rec->r_list[type]);
438 brelse(bh);
439 out_lock:
440 ocfs2_inode_unlock(lqinode, 1);
441 out_put:
442 iput(lqinode);
443 if (status < 0)
444 break;
445 }
446 out:
447 if (status < 0) {
448 ocfs2_free_quota_recovery(rec);
449 rec = ERR_PTR(status);
450 }
451 return rec;
452 }
453
454 /* Sync changes in local quota file into global quota file and
455 * reinitialize local quota file.
456 * The function expects local quota file to be already locked and
457 * s_umount locked in shared mode. */
458 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
459 int type,
460 struct ocfs2_quota_recovery *rec)
461 {
462 struct super_block *sb = lqinode->i_sb;
463 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
464 struct ocfs2_local_disk_chunk *dchunk;
465 struct ocfs2_local_disk_dqblk *dqblk;
466 struct dquot *dquot;
467 handle_t *handle;
468 struct buffer_head *hbh = NULL, *qbh = NULL;
469 int status = 0;
470 int bit, chunk;
471 struct ocfs2_recovery_chunk *rchunk, *next;
472 qsize_t spacechange, inodechange;
473
474 trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
475
476 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
477 chunk = rchunk->rc_chunk;
478 hbh = NULL;
479 status = ocfs2_read_quota_block(lqinode,
480 ol_quota_chunk_block(sb, chunk),
481 &hbh);
482 if (status) {
483 mlog_errno(status);
484 break;
485 }
486 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
487 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
488 qbh = NULL;
489 status = ocfs2_read_quota_block(lqinode,
490 ol_dqblk_block(sb, chunk, bit),
491 &qbh);
492 if (status) {
493 mlog_errno(status);
494 break;
495 }
496 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
497 ol_dqblk_block_off(sb, chunk, bit));
498 dquot = dqget(sb,
499 make_kqid(&init_user_ns, type,
500 le64_to_cpu(dqblk->dqb_id)));
501 if (IS_ERR(dquot)) {
502 status = PTR_ERR(dquot);
503 mlog(ML_ERROR, "Failed to get quota structure "
504 "for id %u, type %d. Cannot finish quota "
505 "file recovery.\n",
506 (unsigned)le64_to_cpu(dqblk->dqb_id),
507 type);
508 goto out_put_bh;
509 }
510 status = ocfs2_lock_global_qf(oinfo, 1);
511 if (status < 0) {
512 mlog_errno(status);
513 goto out_put_dquot;
514 }
515
516 handle = ocfs2_start_trans(OCFS2_SB(sb),
517 OCFS2_QSYNC_CREDITS);
518 if (IS_ERR(handle)) {
519 status = PTR_ERR(handle);
520 mlog_errno(status);
521 goto out_drop_lock;
522 }
523 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
524 spin_lock(&dq_data_lock);
525 /* Add usage from quota entry into quota changes
526 * of our node. Auxiliary variables are important
527 * due to signedness */
528 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
529 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
530 dquot->dq_dqb.dqb_curspace += spacechange;
531 dquot->dq_dqb.dqb_curinodes += inodechange;
532 spin_unlock(&dq_data_lock);
533 /* We want to drop reference held by the crashed
534 * node. Since we have our own reference we know
535 * global structure actually won't be freed. */
536 status = ocfs2_global_release_dquot(dquot);
537 if (status < 0) {
538 mlog_errno(status);
539 goto out_commit;
540 }
541 /* Release local quota file entry */
542 status = ocfs2_journal_access_dq(handle,
543 INODE_CACHE(lqinode),
544 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
545 if (status < 0) {
546 mlog_errno(status);
547 goto out_commit;
548 }
549 lock_buffer(qbh);
550 WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
551 ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
552 le32_add_cpu(&dchunk->dqc_free, 1);
553 unlock_buffer(qbh);
554 ocfs2_journal_dirty(handle, qbh);
555 out_commit:
556 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
557 ocfs2_commit_trans(OCFS2_SB(sb), handle);
558 out_drop_lock:
559 ocfs2_unlock_global_qf(oinfo, 1);
560 out_put_dquot:
561 dqput(dquot);
562 out_put_bh:
563 brelse(qbh);
564 if (status < 0)
565 break;
566 }
567 brelse(hbh);
568 list_del(&rchunk->rc_list);
569 kfree(rchunk->rc_bitmap);
570 kfree(rchunk);
571 if (status < 0)
572 break;
573 }
574 if (status < 0)
575 free_recovery_list(&(rec->r_list[type]));
576 if (status)
577 mlog_errno(status);
578 return status;
579 }
580
581 /* Recover local quota files for given node different from us */
582 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
583 struct ocfs2_quota_recovery *rec,
584 int slot_num)
585 {
586 unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
587 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
588 struct super_block *sb = osb->sb;
589 struct ocfs2_local_disk_dqinfo *ldinfo;
590 struct buffer_head *bh;
591 handle_t *handle;
592 int type;
593 int status = 0;
594 struct inode *lqinode;
595 unsigned int flags;
596
597 printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
598 "slot %u\n", osb->dev_str, slot_num);
599
600 down_read(&sb->s_umount);
601 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
602 if (list_empty(&(rec->r_list[type])))
603 continue;
604 trace_ocfs2_finish_quota_recovery(slot_num);
605 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
606 if (!lqinode) {
607 status = -ENOENT;
608 goto out;
609 }
610 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
611 OCFS2_META_LOCK_NOQUEUE);
612 /* Someone else is holding the lock? Then he must be
613 * doing the recovery. Just skip the file... */
614 if (status == -EAGAIN) {
615 printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
616 "device (%s) for slot %d because quota file is "
617 "locked.\n", osb->dev_str, slot_num);
618 status = 0;
619 goto out_put;
620 } else if (status < 0) {
621 mlog_errno(status);
622 goto out_put;
623 }
624 /* Now read local header */
625 bh = NULL;
626 status = ocfs2_read_quota_block(lqinode, 0, &bh);
627 if (status) {
628 mlog_errno(status);
629 mlog(ML_ERROR, "failed to read quota file info header "
630 "(slot=%d type=%d)\n", slot_num, type);
631 goto out_lock;
632 }
633 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
634 OCFS2_LOCAL_INFO_OFF);
635 /* Is recovery still needed? */
636 flags = le32_to_cpu(ldinfo->dqi_flags);
637 if (!(flags & OLQF_CLEAN))
638 status = ocfs2_recover_local_quota_file(lqinode,
639 type,
640 rec);
641 /* We don't want to mark file as clean when it is actually
642 * active */
643 if (slot_num == osb->slot_num)
644 goto out_bh;
645 /* Mark quota file as clean if we are recovering quota file of
646 * some other node. */
647 handle = ocfs2_start_trans(osb,
648 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
649 if (IS_ERR(handle)) {
650 status = PTR_ERR(handle);
651 mlog_errno(status);
652 goto out_bh;
653 }
654 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
655 bh,
656 OCFS2_JOURNAL_ACCESS_WRITE);
657 if (status < 0) {
658 mlog_errno(status);
659 goto out_trans;
660 }
661 lock_buffer(bh);
662 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
663 unlock_buffer(bh);
664 ocfs2_journal_dirty(handle, bh);
665 out_trans:
666 ocfs2_commit_trans(osb, handle);
667 out_bh:
668 brelse(bh);
669 out_lock:
670 ocfs2_inode_unlock(lqinode, 1);
671 out_put:
672 iput(lqinode);
673 if (status < 0)
674 break;
675 }
676 out:
677 up_read(&sb->s_umount);
678 kfree(rec);
679 return status;
680 }
681
682 /* Read information header from quota file */
683 static int ocfs2_local_read_info(struct super_block *sb, int type)
684 {
685 struct ocfs2_local_disk_dqinfo *ldinfo;
686 struct mem_dqinfo *info = sb_dqinfo(sb, type);
687 struct ocfs2_mem_dqinfo *oinfo;
688 struct inode *lqinode = sb_dqopt(sb)->files[type];
689 int status;
690 struct buffer_head *bh = NULL;
691 struct ocfs2_quota_recovery *rec;
692 int locked = 0;
693
694 /* We don't need the lock and we have to acquire quota file locks
695 * which will later depend on this lock */
696 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
697 info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
698 info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
699 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
700 if (!oinfo) {
701 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
702 " info.");
703 goto out_err;
704 }
705 info->dqi_priv = oinfo;
706 oinfo->dqi_type = type;
707 INIT_LIST_HEAD(&oinfo->dqi_chunk);
708 oinfo->dqi_rec = NULL;
709 oinfo->dqi_lqi_bh = NULL;
710 oinfo->dqi_libh = NULL;
711
712 status = ocfs2_global_read_info(sb, type);
713 if (status < 0)
714 goto out_err;
715
716 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
717 if (status < 0) {
718 mlog_errno(status);
719 goto out_err;
720 }
721 locked = 1;
722
723 /* Now read local header */
724 status = ocfs2_read_quota_block(lqinode, 0, &bh);
725 if (status) {
726 mlog_errno(status);
727 mlog(ML_ERROR, "failed to read quota file info header "
728 "(type=%d)\n", type);
729 goto out_err;
730 }
731 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
732 OCFS2_LOCAL_INFO_OFF);
733 oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
734 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
735 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
736 oinfo->dqi_libh = bh;
737
738 /* We crashed when using local quota file? */
739 if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
740 rec = OCFS2_SB(sb)->quota_rec;
741 if (!rec) {
742 rec = ocfs2_alloc_quota_recovery();
743 if (!rec) {
744 status = -ENOMEM;
745 mlog_errno(status);
746 goto out_err;
747 }
748 OCFS2_SB(sb)->quota_rec = rec;
749 }
750
751 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
752 &rec->r_list[type]);
753 if (status < 0) {
754 mlog_errno(status);
755 goto out_err;
756 }
757 }
758
759 status = ocfs2_load_local_quota_bitmaps(lqinode,
760 ldinfo,
761 &oinfo->dqi_chunk);
762 if (status < 0) {
763 mlog_errno(status);
764 goto out_err;
765 }
766
767 /* Now mark quota file as used */
768 oinfo->dqi_flags &= ~OLQF_CLEAN;
769 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
770 if (status < 0) {
771 mlog_errno(status);
772 goto out_err;
773 }
774
775 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
776 return 0;
777 out_err:
778 if (oinfo) {
779 iput(oinfo->dqi_gqinode);
780 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
781 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
782 brelse(oinfo->dqi_lqi_bh);
783 if (locked)
784 ocfs2_inode_unlock(lqinode, 1);
785 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
786 kfree(oinfo);
787 }
788 brelse(bh);
789 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
790 return -1;
791 }
792
793 /* Write local info to quota file */
794 static int ocfs2_local_write_info(struct super_block *sb, int type)
795 {
796 struct mem_dqinfo *info = sb_dqinfo(sb, type);
797 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
798 ->dqi_libh;
799 int status;
800
801 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
802 info);
803 if (status < 0) {
804 mlog_errno(status);
805 return -1;
806 }
807
808 return 0;
809 }
810
811 /* Release info from memory */
812 static int ocfs2_local_free_info(struct super_block *sb, int type)
813 {
814 struct mem_dqinfo *info = sb_dqinfo(sb, type);
815 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
816 struct ocfs2_quota_chunk *chunk;
817 struct ocfs2_local_disk_chunk *dchunk;
818 int mark_clean = 1, len;
819 int status;
820
821 iput(oinfo->dqi_gqinode);
822 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
823 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
824 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
825 dchunk = (struct ocfs2_local_disk_chunk *)
826 (chunk->qc_headerbh->b_data);
827 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
828 len = ol_chunk_entries(sb);
829 } else {
830 len = (oinfo->dqi_blocks -
831 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
832 * ol_quota_entries_per_block(sb);
833 }
834 /* Not all entries free? Bug! */
835 if (le32_to_cpu(dchunk->dqc_free) != len) {
836 mlog(ML_ERROR, "releasing quota file with used "
837 "entries (type=%d)\n", type);
838 mark_clean = 0;
839 }
840 }
841 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
842
843 /*
844 * s_umount held in exclusive mode protects us against racing with
845 * recovery thread...
846 */
847 if (oinfo->dqi_rec) {
848 ocfs2_free_quota_recovery(oinfo->dqi_rec);
849 mark_clean = 0;
850 }
851
852 if (!mark_clean)
853 goto out;
854
855 /* Mark local file as clean */
856 oinfo->dqi_flags |= OLQF_CLEAN;
857 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
858 oinfo->dqi_libh,
859 olq_update_info,
860 info);
861 if (status < 0) {
862 mlog_errno(status);
863 goto out;
864 }
865
866 out:
867 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
868 brelse(oinfo->dqi_libh);
869 brelse(oinfo->dqi_lqi_bh);
870 kfree(oinfo);
871 return 0;
872 }
873
874 static void olq_set_dquot(struct buffer_head *bh, void *private)
875 {
876 struct ocfs2_dquot *od = private;
877 struct ocfs2_local_disk_dqblk *dqblk;
878 struct super_block *sb = od->dq_dquot.dq_sb;
879
880 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
881 + ol_dqblk_block_offset(sb, od->dq_local_off));
882
883 dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
884 od->dq_dquot.dq_id));
885 spin_lock(&dq_data_lock);
886 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
887 od->dq_origspace);
888 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
889 od->dq_originodes);
890 spin_unlock(&dq_data_lock);
891 trace_olq_set_dquot(
892 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
893 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
894 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
895 }
896
897 /* Write dquot to local quota file */
898 int ocfs2_local_write_dquot(struct dquot *dquot)
899 {
900 struct super_block *sb = dquot->dq_sb;
901 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
902 struct buffer_head *bh;
903 struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
904 int status;
905
906 status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
907 &bh);
908 if (status) {
909 mlog_errno(status);
910 goto out;
911 }
912 status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
913 if (status < 0) {
914 mlog_errno(status);
915 goto out;
916 }
917 out:
918 brelse(bh);
919 return status;
920 }
921
922 /* Find free entry in local quota file */
923 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
924 int type,
925 int *offset)
926 {
927 struct mem_dqinfo *info = sb_dqinfo(sb, type);
928 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
929 struct ocfs2_quota_chunk *chunk;
930 struct ocfs2_local_disk_chunk *dchunk;
931 int found = 0, len;
932
933 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
934 dchunk = (struct ocfs2_local_disk_chunk *)
935 chunk->qc_headerbh->b_data;
936 if (le32_to_cpu(dchunk->dqc_free) > 0) {
937 found = 1;
938 break;
939 }
940 }
941 if (!found)
942 return NULL;
943
944 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
945 len = ol_chunk_entries(sb);
946 } else {
947 len = (oinfo->dqi_blocks -
948 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
949 * ol_quota_entries_per_block(sb);
950 }
951
952 found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
953 /* We failed? */
954 if (found == len) {
955 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
956 " entries free (type=%d)\n", chunk->qc_num,
957 le32_to_cpu(dchunk->dqc_free), type);
958 return ERR_PTR(-EIO);
959 }
960 *offset = found;
961 return chunk;
962 }
963
964 /* Add new chunk to the local quota file */
965 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
966 struct super_block *sb,
967 int type,
968 int *offset)
969 {
970 struct mem_dqinfo *info = sb_dqinfo(sb, type);
971 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
972 struct inode *lqinode = sb_dqopt(sb)->files[type];
973 struct ocfs2_quota_chunk *chunk = NULL;
974 struct ocfs2_local_disk_chunk *dchunk;
975 int status;
976 handle_t *handle;
977 struct buffer_head *bh = NULL, *dbh = NULL;
978 u64 p_blkno;
979
980 /* We are protected by dqio_sem so no locking needed */
981 status = ocfs2_extend_no_holes(lqinode, NULL,
982 i_size_read(lqinode) + 2 * sb->s_blocksize,
983 i_size_read(lqinode));
984 if (status < 0) {
985 mlog_errno(status);
986 goto out;
987 }
988 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
989 i_size_read(lqinode) + 2 * sb->s_blocksize);
990 if (status < 0) {
991 mlog_errno(status);
992 goto out;
993 }
994
995 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
996 if (!chunk) {
997 status = -ENOMEM;
998 mlog_errno(status);
999 goto out;
1000 }
1001 /* Local quota info and two new blocks we initialize */
1002 handle = ocfs2_start_trans(OCFS2_SB(sb),
1003 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1004 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1005 if (IS_ERR(handle)) {
1006 status = PTR_ERR(handle);
1007 mlog_errno(status);
1008 goto out;
1009 }
1010
1011 /* Initialize chunk header */
1012 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1013 &p_blkno, NULL, NULL);
1014 if (status < 0) {
1015 mlog_errno(status);
1016 goto out_trans;
1017 }
1018 bh = sb_getblk(sb, p_blkno);
1019 if (!bh) {
1020 status = -ENOMEM;
1021 mlog_errno(status);
1022 goto out_trans;
1023 }
1024 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1025 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1026 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1027 OCFS2_JOURNAL_ACCESS_CREATE);
1028 if (status < 0) {
1029 mlog_errno(status);
1030 goto out_trans;
1031 }
1032 lock_buffer(bh);
1033 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1034 memset(dchunk->dqc_bitmap, 0,
1035 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1036 OCFS2_QBLK_RESERVED_SPACE);
1037 unlock_buffer(bh);
1038 ocfs2_journal_dirty(handle, bh);
1039
1040 /* Initialize new block with structures */
1041 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1042 &p_blkno, NULL, NULL);
1043 if (status < 0) {
1044 mlog_errno(status);
1045 goto out_trans;
1046 }
1047 dbh = sb_getblk(sb, p_blkno);
1048 if (!dbh) {
1049 status = -ENOMEM;
1050 mlog_errno(status);
1051 goto out_trans;
1052 }
1053 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1054 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1055 OCFS2_JOURNAL_ACCESS_CREATE);
1056 if (status < 0) {
1057 mlog_errno(status);
1058 goto out_trans;
1059 }
1060 lock_buffer(dbh);
1061 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1062 unlock_buffer(dbh);
1063 ocfs2_journal_dirty(handle, dbh);
1064
1065 /* Update local quotafile info */
1066 oinfo->dqi_blocks += 2;
1067 oinfo->dqi_chunks++;
1068 status = ocfs2_local_write_info(sb, type);
1069 if (status < 0) {
1070 mlog_errno(status);
1071 goto out_trans;
1072 }
1073 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1074 if (status < 0) {
1075 mlog_errno(status);
1076 goto out;
1077 }
1078
1079 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1080 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1081 struct ocfs2_quota_chunk,
1082 qc_chunk)->qc_num + 1;
1083 chunk->qc_headerbh = bh;
1084 *offset = 0;
1085 return chunk;
1086 out_trans:
1087 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1088 out:
1089 brelse(bh);
1090 brelse(dbh);
1091 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1092 return ERR_PTR(status);
1093 }
1094
1095 /* Find free entry in local quota file */
1096 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1097 struct super_block *sb,
1098 int type,
1099 int *offset)
1100 {
1101 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1102 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1103 struct ocfs2_quota_chunk *chunk;
1104 struct inode *lqinode = sb_dqopt(sb)->files[type];
1105 struct ocfs2_local_disk_chunk *dchunk;
1106 int epb = ol_quota_entries_per_block(sb);
1107 unsigned int chunk_blocks;
1108 struct buffer_head *bh;
1109 u64 p_blkno;
1110 int status;
1111 handle_t *handle;
1112
1113 if (list_empty(&oinfo->dqi_chunk))
1114 return ocfs2_local_quota_add_chunk(sb, type, offset);
1115 /* Is the last chunk full? */
1116 chunk = list_entry(oinfo->dqi_chunk.prev,
1117 struct ocfs2_quota_chunk, qc_chunk);
1118 chunk_blocks = oinfo->dqi_blocks -
1119 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1120 if (ol_chunk_blocks(sb) == chunk_blocks)
1121 return ocfs2_local_quota_add_chunk(sb, type, offset);
1122
1123 /* We are protected by dqio_sem so no locking needed */
1124 status = ocfs2_extend_no_holes(lqinode, NULL,
1125 i_size_read(lqinode) + sb->s_blocksize,
1126 i_size_read(lqinode));
1127 if (status < 0) {
1128 mlog_errno(status);
1129 goto out;
1130 }
1131 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1132 i_size_read(lqinode) + sb->s_blocksize);
1133 if (status < 0) {
1134 mlog_errno(status);
1135 goto out;
1136 }
1137
1138 /* Get buffer from the just added block */
1139 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1140 &p_blkno, NULL, NULL);
1141 if (status < 0) {
1142 mlog_errno(status);
1143 goto out;
1144 }
1145 bh = sb_getblk(sb, p_blkno);
1146 if (!bh) {
1147 status = -ENOMEM;
1148 mlog_errno(status);
1149 goto out;
1150 }
1151 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1152
1153 /* Local quota info, chunk header and the new block we initialize */
1154 handle = ocfs2_start_trans(OCFS2_SB(sb),
1155 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1156 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1157 if (IS_ERR(handle)) {
1158 status = PTR_ERR(handle);
1159 mlog_errno(status);
1160 goto out;
1161 }
1162 /* Zero created block */
1163 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1164 OCFS2_JOURNAL_ACCESS_CREATE);
1165 if (status < 0) {
1166 mlog_errno(status);
1167 goto out_trans;
1168 }
1169 lock_buffer(bh);
1170 memset(bh->b_data, 0, sb->s_blocksize);
1171 unlock_buffer(bh);
1172 ocfs2_journal_dirty(handle, bh);
1173
1174 /* Update chunk header */
1175 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1176 chunk->qc_headerbh,
1177 OCFS2_JOURNAL_ACCESS_WRITE);
1178 if (status < 0) {
1179 mlog_errno(status);
1180 goto out_trans;
1181 }
1182
1183 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1184 lock_buffer(chunk->qc_headerbh);
1185 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1186 unlock_buffer(chunk->qc_headerbh);
1187 ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1188
1189 /* Update file header */
1190 oinfo->dqi_blocks++;
1191 status = ocfs2_local_write_info(sb, type);
1192 if (status < 0) {
1193 mlog_errno(status);
1194 goto out_trans;
1195 }
1196
1197 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1198 if (status < 0) {
1199 mlog_errno(status);
1200 goto out;
1201 }
1202 *offset = chunk_blocks * epb;
1203 return chunk;
1204 out_trans:
1205 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1206 out:
1207 return ERR_PTR(status);
1208 }
1209
1210 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1211 {
1212 int *offset = private;
1213 struct ocfs2_local_disk_chunk *dchunk;
1214
1215 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1216 ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1217 le32_add_cpu(&dchunk->dqc_free, -1);
1218 }
1219
1220 /* Create dquot in the local file for given id */
1221 int ocfs2_create_local_dquot(struct dquot *dquot)
1222 {
1223 struct super_block *sb = dquot->dq_sb;
1224 int type = dquot->dq_id.type;
1225 struct inode *lqinode = sb_dqopt(sb)->files[type];
1226 struct ocfs2_quota_chunk *chunk;
1227 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1228 int offset;
1229 int status;
1230 u64 pcount;
1231
1232 down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1233 chunk = ocfs2_find_free_entry(sb, type, &offset);
1234 if (!chunk) {
1235 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1236 if (IS_ERR(chunk)) {
1237 status = PTR_ERR(chunk);
1238 goto out;
1239 }
1240 } else if (IS_ERR(chunk)) {
1241 status = PTR_ERR(chunk);
1242 goto out;
1243 }
1244 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1245 od->dq_chunk = chunk;
1246 status = ocfs2_extent_map_get_blocks(lqinode,
1247 ol_dqblk_block(sb, chunk->qc_num, offset),
1248 &od->dq_local_phys_blk,
1249 &pcount,
1250 NULL);
1251
1252 /* Initialize dquot structure on disk */
1253 status = ocfs2_local_write_dquot(dquot);
1254 if (status < 0) {
1255 mlog_errno(status);
1256 goto out;
1257 }
1258
1259 /* Mark structure as allocated */
1260 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1261 &offset);
1262 if (status < 0) {
1263 mlog_errno(status);
1264 goto out;
1265 }
1266 out:
1267 up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1268 return status;
1269 }
1270
1271 /*
1272 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1273 * already started a transaction and written all changes to global quota file
1274 */
1275 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1276 {
1277 int status;
1278 int type = dquot->dq_id.type;
1279 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1280 struct super_block *sb = dquot->dq_sb;
1281 struct ocfs2_local_disk_chunk *dchunk;
1282 int offset;
1283
1284 status = ocfs2_journal_access_dq(handle,
1285 INODE_CACHE(sb_dqopt(sb)->files[type]),
1286 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1287 if (status < 0) {
1288 mlog_errno(status);
1289 goto out;
1290 }
1291 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1292 od->dq_local_off);
1293 dchunk = (struct ocfs2_local_disk_chunk *)
1294 (od->dq_chunk->qc_headerbh->b_data);
1295 /* Mark structure as freed */
1296 lock_buffer(od->dq_chunk->qc_headerbh);
1297 ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1298 le32_add_cpu(&dchunk->dqc_free, 1);
1299 unlock_buffer(od->dq_chunk->qc_headerbh);
1300 ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1301
1302 out:
1303 return status;
1304 }
1305
1306 static const struct quota_format_ops ocfs2_format_ops = {
1307 .check_quota_file = ocfs2_local_check_quota_file,
1308 .read_file_info = ocfs2_local_read_info,
1309 .write_file_info = ocfs2_global_write_info,
1310 .free_file_info = ocfs2_local_free_info,
1311 };
1312
1313 struct quota_format_type ocfs2_quota_format = {
1314 .qf_fmt_id = QFMT_OCFS2,
1315 .qf_ops = &ocfs2_format_ops,
1316 .qf_owner = THIS_MODULE
1317 };
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