1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Implementation of operations over local quota file
4 */
5
6#include <linux/fs.h>
7#include <linux/slab.h>
8#include <linux/quota.h>
9#include <linux/quotaops.h>
10#include <linux/module.h>
11
12#include <cluster/masklog.h>
13
14#include "ocfs2_fs.h"
15#include "ocfs2.h"
16#include "inode.h"
17#include "alloc.h"
18#include "file.h"
19#include "buffer_head_io.h"
20#include "journal.h"
21#include "sysfile.h"
22#include "dlmglue.h"
23#include "quota.h"
24#include "uptodate.h"
25#include "super.h"
26#include "ocfs2_trace.h"
27
28/* Number of local quota structures per block */
29static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
30{
31 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
32 sizeof(struct ocfs2_local_disk_dqblk));
33}
34
35/* Number of blocks with entries in one chunk */
36static inline unsigned int ol_chunk_blocks(struct super_block *sb)
37{
38 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
39 OCFS2_QBLK_RESERVED_SPACE) << 3) /
40 ol_quota_entries_per_block(sb);
41}
42
43/* Number of entries in a chunk bitmap */
44static unsigned int ol_chunk_entries(struct super_block *sb)
45{
46 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
47}
48
49/* Offset of the chunk in quota file */
50static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
51{
52 /* 1 block for local quota file info, 1 block per chunk for chunk info */
53 return 1 + (ol_chunk_blocks(sb) + 1) * c;
54}
55
56static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
57{
58 int epb = ol_quota_entries_per_block(sb);
59
60 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
61}
62
63static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
64{
65 int epb = ol_quota_entries_per_block(sb);
66
67 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
68}
69
70/* Offset of the dquot structure in the quota file */
71static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
72{
73 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
74 ol_dqblk_block_off(sb, c, off);
75}
76
77static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
78{
79 return off & ((1 << sb->s_blocksize_bits) - 1);
80}
81
82/* Compute offset in the chunk of a structure with the given offset */
83static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
84{
85 int epb = ol_quota_entries_per_block(sb);
86
87 return ((off >> sb->s_blocksize_bits) -
88 ol_quota_chunk_block(sb, c) - 1) * epb
89 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
90 sizeof(struct ocfs2_local_disk_dqblk);
91}
92
93/* Write bufferhead into the fs */
94static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
95 void (*modify)(struct buffer_head *, void *), void *private)
96{
97 struct super_block *sb = inode->i_sb;
98 handle_t *handle;
99 int status;
100
101 handle = ocfs2_start_trans(OCFS2_SB(sb),
102 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
103 if (IS_ERR(ptr: handle)) {
104 status = PTR_ERR(ptr: handle);
105 mlog_errno(status);
106 return status;
107 }
108 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode), bh,
109 OCFS2_JOURNAL_ACCESS_WRITE);
110 if (status < 0) {
111 mlog_errno(status);
112 ocfs2_commit_trans(OCFS2_SB(sb), handle);
113 return status;
114 }
115 lock_buffer(bh);
116 modify(bh, private);
117 unlock_buffer(bh);
118 ocfs2_journal_dirty(handle, bh);
119
120 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
121 if (status < 0) {
122 mlog_errno(status);
123 return status;
124 }
125 return 0;
126}
127
128/*
129 * Read quota block from a given logical offset.
130 *
131 * This function acquires ip_alloc_sem and thus it must not be called with a
132 * transaction started.
133 */
134static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
135 struct buffer_head **bh)
136{
137 int rc = 0;
138 struct buffer_head *tmp = *bh;
139
140 if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block)
141 return ocfs2_error(inode->i_sb,
142 "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
143 (unsigned long long)OCFS2_I(inode)->ip_blkno,
144 (unsigned long long)v_block,
145 (unsigned long long)i_size_read(inode));
146
147 rc = ocfs2_read_virt_blocks(inode, v_block, nr: 1, bhs: &tmp, flags: 0,
148 validate: 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 */
160static 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(inode: linode, v_block: 0, bh: &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), type: 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(inode: ginode, v_block: 0, bh: &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;
230out_err:
231 brelse(bh);
232 iput(ginode);
233 return ret;
234}
235
236/* Release given list of quota file chunks */
237static 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(entry: &pos->qc_chunk);
243 brelse(bh: pos->qc_headerbh);
244 kmem_cache_free(s: ocfs2_qf_chunk_cachep, objp: pos);
245 }
246}
247
248/* Load quota bitmaps into memory */
249static 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(list: head);
257 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
258 newchunk = kmem_cache_alloc(cachep: 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 v_block: ol_quota_chunk_block(sb: inode->i_sb, c: i),
267 bh: &newchunk->qc_headerbh);
268 if (status) {
269 mlog_errno(status);
270 kmem_cache_free(s: ocfs2_qf_chunk_cachep, objp: newchunk);
271 ocfs2_release_local_quota_bitmaps(head);
272 return status;
273 }
274 list_add_tail(new: &newchunk->qc_chunk, head);
275 }
276 return 0;
277}
278
279static 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(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(lock: &dq_data_lock);
292}
293
294static 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(size: sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
302 if (!rc)
303 return -ENOMEM;
304 rc->rc_chunk = chunk;
305 rc->rc_bitmap = kmalloc(size: sb->s_blocksize, GFP_NOFS);
306 if (!rc->rc_bitmap) {
307 kfree(objp: rc);
308 return -ENOMEM;
309 }
310 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
311 (ol_chunk_entries(sb) + 7) >> 3);
312 list_add_tail(new: &rc->rc_list, head);
313 return 0;
314}
315
316static 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(entry: &rchunk->rc_list);
323 kfree(objp: rchunk->rc_bitmap);
324 kfree(objp: rchunk);
325 }
326}
327
328void 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(head: &(rec->r_list[type]));
334 kfree(objp: rec);
335}
336
337/* Load entries in our quota file we have to recover*/
338static 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(inode: lqinode,
352 v_block: ol_quota_chunk_block(sb, c: i),
353 bh: &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, chunk: i, head);
361 brelse(bh: hbh);
362 if (status < 0)
363 break;
364 }
365 if (status < 0)
366 free_recovery_list(head);
367 return status;
368}
369
370static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
371{
372 int type;
373 struct ocfs2_quota_recovery *rec;
374
375 rec = kmalloc(size: 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(list: &(rec->r_list[type]));
380 return rec;
381}
382
383/* Load information we need for quota recovery into memory */
384struct 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(error: -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, type: ino[type], slot: 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(inode: lqinode, v_block: 0, bh: &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 head: &rec->r_list[type]);
438 brelse(bh);
439out_lock:
440 ocfs2_inode_unlock(inode: lqinode, ex: 1);
441out_put:
442 iput(lqinode);
443 if (status < 0)
444 break;
445 }
446out:
447 if (status < 0) {
448 ocfs2_free_quota_recovery(rec);
449 rec = ERR_PTR(error: 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. */
458static 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(val1: (unsigned long)lqinode->i_ino, val2: 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(inode: lqinode,
480 v_block: ol_quota_chunk_block(sb, c: chunk),
481 bh: &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(inode: lqinode,
490 v_block: ol_dqblk_block(sb, c: chunk, off: bit),
491 bh: &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, c: chunk, off: bit));
498 dquot = dqget(sb,
499 qid: make_kqid(from: &init_user_ns, type,
500 le64_to_cpu(dqblk->dqb_id)));
501 if (IS_ERR(ptr: dquot)) {
502 status = PTR_ERR(ptr: 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, ex: 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(ptr: handle)) {
519 status = PTR_ERR(ptr: handle);
520 mlog_errno(status);
521 goto out_drop_lock;
522 }
523 down_write(sem: &sb_dqopt(sb)->dqio_sem);
524 spin_lock(lock: &dquot->dq_dqb_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(lock: &dquot->dq_dqb_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 ci: INODE_CACHE(inode: lqinode),
544 bh: qbh, OCFS2_JOURNAL_ACCESS_WRITE);
545 if (status < 0) {
546 mlog_errno(status);
547 goto out_commit;
548 }
549 lock_buffer(bh: qbh);
550 WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
551 ocfs2_clear_bit_unaligned(bit, bitmap: dchunk->dqc_bitmap);
552 le32_add_cpu(var: &dchunk->dqc_free, val: 1);
553 unlock_buffer(bh: qbh);
554 ocfs2_journal_dirty(handle, bh: qbh);
555out_commit:
556 up_write(sem: &sb_dqopt(sb)->dqio_sem);
557 ocfs2_commit_trans(OCFS2_SB(sb), handle);
558out_drop_lock:
559 ocfs2_unlock_global_qf(oinfo, ex: 1);
560out_put_dquot:
561 dqput(dquot);
562out_put_bh:
563 brelse(bh: qbh);
564 if (status < 0)
565 break;
566 }
567 brelse(bh: hbh);
568 list_del(entry: &rchunk->rc_list);
569 kfree(objp: rchunk->rc_bitmap);
570 kfree(objp: rchunk);
571 if (status < 0)
572 break;
573 }
574 if (status < 0)
575 free_recovery_list(head: &(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 */
582int 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(sem: &sb->s_umount);
601 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
602 if (list_empty(head: &(rec->r_list[type])))
603 continue;
604 trace_ocfs2_finish_quota_recovery(num: slot_num);
605 lqinode = ocfs2_get_system_file_inode(osb, type: ino[type], slot: 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(inode: lqinode, v_block: 0, bh: &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(ptr: handle)) {
650 status = PTR_ERR(ptr: handle);
651 mlog_errno(status);
652 goto out_bh;
653 }
654 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: 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);
665out_trans:
666 ocfs2_commit_trans(osb, handle);
667out_bh:
668 brelse(bh);
669out_lock:
670 ocfs2_inode_unlock(inode: lqinode, ex: 1);
671out_put:
672 iput(lqinode);
673 if (status < 0)
674 break;
675 }
676out:
677 up_read(sem: &sb->s_umount);
678 kfree(objp: rec);
679 return status;
680}
681
682/* Read information header from quota file */
683static 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 info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
695 info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
696 oinfo = kmalloc(size: sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
697 if (!oinfo) {
698 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
699 " info.");
700 goto out_err;
701 }
702 info->dqi_priv = oinfo;
703 oinfo->dqi_type = type;
704 INIT_LIST_HEAD(list: &oinfo->dqi_chunk);
705 oinfo->dqi_rec = NULL;
706 oinfo->dqi_lqi_bh = NULL;
707 oinfo->dqi_libh = NULL;
708
709 status = ocfs2_global_read_info(sb, type);
710 if (status < 0)
711 goto out_err;
712
713 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
714 if (status < 0) {
715 mlog_errno(status);
716 goto out_err;
717 }
718 locked = 1;
719
720 /* Now read local header */
721 status = ocfs2_read_quota_block(inode: lqinode, v_block: 0, bh: &bh);
722 if (status) {
723 mlog_errno(status);
724 mlog(ML_ERROR, "failed to read quota file info header "
725 "(type=%d)\n", type);
726 goto out_err;
727 }
728 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
729 OCFS2_LOCAL_INFO_OFF);
730 oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
731 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
732 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
733 oinfo->dqi_libh = bh;
734
735 /* We crashed when using local quota file? */
736 if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
737 rec = OCFS2_SB(sb)->quota_rec;
738 if (!rec) {
739 rec = ocfs2_alloc_quota_recovery();
740 if (!rec) {
741 status = -ENOMEM;
742 mlog_errno(status);
743 goto out_err;
744 }
745 OCFS2_SB(sb)->quota_rec = rec;
746 }
747
748 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
749 head: &rec->r_list[type]);
750 if (status < 0) {
751 mlog_errno(status);
752 goto out_err;
753 }
754 }
755
756 status = ocfs2_load_local_quota_bitmaps(inode: lqinode,
757 ldinfo,
758 head: &oinfo->dqi_chunk);
759 if (status < 0) {
760 mlog_errno(status);
761 goto out_err;
762 }
763
764 /* Now mark quota file as used */
765 oinfo->dqi_flags &= ~OLQF_CLEAN;
766 status = ocfs2_modify_bh(inode: lqinode, bh, modify: olq_update_info, private: info);
767 if (status < 0) {
768 mlog_errno(status);
769 goto out_err;
770 }
771
772 return 0;
773out_err:
774 if (oinfo) {
775 iput(oinfo->dqi_gqinode);
776 ocfs2_simple_drop_lockres(OCFS2_SB(sb), lockres: &oinfo->dqi_gqlock);
777 ocfs2_lock_res_free(res: &oinfo->dqi_gqlock);
778 brelse(bh: oinfo->dqi_lqi_bh);
779 if (locked)
780 ocfs2_inode_unlock(inode: lqinode, ex: 1);
781 ocfs2_release_local_quota_bitmaps(head: &oinfo->dqi_chunk);
782 kfree(objp: oinfo);
783 }
784 brelse(bh);
785 return -1;
786}
787
788/* Write local info to quota file */
789static int ocfs2_local_write_info(struct super_block *sb, int type)
790{
791 struct mem_dqinfo *info = sb_dqinfo(sb, type);
792 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
793 ->dqi_libh;
794 int status;
795
796 status = ocfs2_modify_bh(inode: sb_dqopt(sb)->files[type], bh, modify: olq_update_info,
797 private: info);
798 if (status < 0) {
799 mlog_errno(status);
800 return -1;
801 }
802
803 return 0;
804}
805
806/* Release info from memory */
807static int ocfs2_local_free_info(struct super_block *sb, int type)
808{
809 struct mem_dqinfo *info = sb_dqinfo(sb, type);
810 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
811 struct ocfs2_quota_chunk *chunk;
812 struct ocfs2_local_disk_chunk *dchunk;
813 int mark_clean = 1, len;
814 int status = 0;
815
816 iput(oinfo->dqi_gqinode);
817 ocfs2_simple_drop_lockres(OCFS2_SB(sb), lockres: &oinfo->dqi_gqlock);
818 ocfs2_lock_res_free(res: &oinfo->dqi_gqlock);
819 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
820 dchunk = (struct ocfs2_local_disk_chunk *)
821 (chunk->qc_headerbh->b_data);
822 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
823 len = ol_chunk_entries(sb);
824 } else {
825 len = (oinfo->dqi_blocks -
826 ol_quota_chunk_block(sb, c: chunk->qc_num) - 1)
827 * ol_quota_entries_per_block(sb);
828 }
829 /* Not all entries free? Bug! */
830 if (le32_to_cpu(dchunk->dqc_free) != len) {
831 mlog(ML_ERROR, "releasing quota file with used "
832 "entries (type=%d)\n", type);
833 mark_clean = 0;
834 }
835 }
836 ocfs2_release_local_quota_bitmaps(head: &oinfo->dqi_chunk);
837
838 /*
839 * s_umount held in exclusive mode protects us against racing with
840 * recovery thread...
841 */
842 if (oinfo->dqi_rec) {
843 ocfs2_free_quota_recovery(rec: oinfo->dqi_rec);
844 mark_clean = 0;
845 }
846
847 if (!mark_clean)
848 goto out;
849
850 /* Mark local file as clean */
851 oinfo->dqi_flags |= OLQF_CLEAN;
852 status = ocfs2_modify_bh(inode: sb_dqopt(sb)->files[type],
853 bh: oinfo->dqi_libh,
854 modify: olq_update_info,
855 private: info);
856 if (status < 0)
857 mlog_errno(status);
858out:
859 ocfs2_inode_unlock(inode: sb_dqopt(sb)->files[type], ex: 1);
860 brelse(bh: oinfo->dqi_libh);
861 brelse(bh: oinfo->dqi_lqi_bh);
862 kfree(objp: oinfo);
863 return status;
864}
865
866static void olq_set_dquot(struct buffer_head *bh, void *private)
867{
868 struct ocfs2_dquot *od = private;
869 struct ocfs2_local_disk_dqblk *dqblk;
870 struct super_block *sb = od->dq_dquot.dq_sb;
871
872 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
873 + ol_dqblk_block_offset(sb, off: od->dq_local_off));
874
875 dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
876 od->dq_dquot.dq_id));
877 spin_lock(lock: &od->dq_dquot.dq_dqb_lock);
878 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
879 od->dq_origspace);
880 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
881 od->dq_originodes);
882 spin_unlock(lock: &od->dq_dquot.dq_dqb_lock);
883 trace_olq_set_dquot(
884 val1: (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
885 val2: (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
886 val3: from_kqid(to: &init_user_ns, qid: od->dq_dquot.dq_id));
887}
888
889/* Write dquot to local quota file */
890int ocfs2_local_write_dquot(struct dquot *dquot)
891{
892 struct super_block *sb = dquot->dq_sb;
893 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
894 struct buffer_head *bh;
895 struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
896 int status;
897
898 status = ocfs2_read_quota_phys_block(inode: lqinode, p_block: od->dq_local_phys_blk,
899 bh: &bh);
900 if (status) {
901 mlog_errno(status);
902 goto out;
903 }
904 status = ocfs2_modify_bh(inode: lqinode, bh, modify: olq_set_dquot, private: od);
905 if (status < 0) {
906 mlog_errno(status);
907 goto out;
908 }
909out:
910 brelse(bh);
911 return status;
912}
913
914/* Find free entry in local quota file */
915static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
916 int type,
917 int *offset)
918{
919 struct mem_dqinfo *info = sb_dqinfo(sb, type);
920 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
921 struct ocfs2_quota_chunk *chunk = NULL, *iter;
922 struct ocfs2_local_disk_chunk *dchunk;
923 int found = 0, len;
924
925 list_for_each_entry(iter, &oinfo->dqi_chunk, qc_chunk) {
926 dchunk = (struct ocfs2_local_disk_chunk *)
927 iter->qc_headerbh->b_data;
928 if (le32_to_cpu(dchunk->dqc_free) > 0) {
929 chunk = iter;
930 break;
931 }
932 }
933 if (!chunk)
934 return NULL;
935
936 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
937 len = ol_chunk_entries(sb);
938 } else {
939 len = (oinfo->dqi_blocks -
940 ol_quota_chunk_block(sb, c: chunk->qc_num) - 1)
941 * ol_quota_entries_per_block(sb);
942 }
943
944 found = ocfs2_find_next_zero_bit_unaligned(bitmap: dchunk->dqc_bitmap, max: len, start: 0);
945 /* We failed? */
946 if (found == len) {
947 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
948 " entries free (type=%d)\n", chunk->qc_num,
949 le32_to_cpu(dchunk->dqc_free), type);
950 return ERR_PTR(error: -EIO);
951 }
952 *offset = found;
953 return chunk;
954}
955
956/* Add new chunk to the local quota file */
957static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
958 struct super_block *sb,
959 int type,
960 int *offset)
961{
962 struct mem_dqinfo *info = sb_dqinfo(sb, type);
963 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
964 struct inode *lqinode = sb_dqopt(sb)->files[type];
965 struct ocfs2_quota_chunk *chunk = NULL;
966 struct ocfs2_local_disk_chunk *dchunk;
967 int status;
968 handle_t *handle;
969 struct buffer_head *bh = NULL, *dbh = NULL;
970 u64 p_blkno;
971
972 /* We are protected by dqio_sem so no locking needed */
973 status = ocfs2_extend_no_holes(inode: lqinode, NULL,
974 new_i_size: i_size_read(inode: lqinode) + 2 * sb->s_blocksize,
975 zero_to: i_size_read(inode: lqinode));
976 if (status < 0) {
977 mlog_errno(status);
978 goto out;
979 }
980 status = ocfs2_simple_size_update(inode: lqinode, di_bh: oinfo->dqi_lqi_bh,
981 new_i_size: i_size_read(inode: lqinode) + 2 * sb->s_blocksize);
982 if (status < 0) {
983 mlog_errno(status);
984 goto out;
985 }
986
987 chunk = kmem_cache_alloc(cachep: ocfs2_qf_chunk_cachep, GFP_NOFS);
988 if (!chunk) {
989 status = -ENOMEM;
990 mlog_errno(status);
991 goto out;
992 }
993 /* Local quota info and two new blocks we initialize */
994 handle = ocfs2_start_trans(OCFS2_SB(sb),
995 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
996 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
997 if (IS_ERR(ptr: handle)) {
998 status = PTR_ERR(ptr: handle);
999 mlog_errno(status);
1000 goto out;
1001 }
1002
1003 /* Initialize chunk header */
1004 status = ocfs2_extent_map_get_blocks(inode: lqinode, v_blkno: oinfo->dqi_blocks,
1005 p_blkno: &p_blkno, NULL, NULL);
1006 if (status < 0) {
1007 mlog_errno(status);
1008 goto out_trans;
1009 }
1010 bh = sb_getblk(sb, block: p_blkno);
1011 if (!bh) {
1012 status = -ENOMEM;
1013 mlog_errno(status);
1014 goto out_trans;
1015 }
1016 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1017 ocfs2_set_new_buffer_uptodate(ci: INODE_CACHE(inode: lqinode), bh);
1018 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: lqinode), bh,
1019 OCFS2_JOURNAL_ACCESS_CREATE);
1020 if (status < 0) {
1021 mlog_errno(status);
1022 goto out_trans;
1023 }
1024 lock_buffer(bh);
1025 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1026 memset(dchunk->dqc_bitmap, 0,
1027 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1028 OCFS2_QBLK_RESERVED_SPACE);
1029 unlock_buffer(bh);
1030 ocfs2_journal_dirty(handle, bh);
1031
1032 /* Initialize new block with structures */
1033 status = ocfs2_extent_map_get_blocks(inode: lqinode, v_blkno: oinfo->dqi_blocks + 1,
1034 p_blkno: &p_blkno, NULL, NULL);
1035 if (status < 0) {
1036 mlog_errno(status);
1037 goto out_trans;
1038 }
1039 dbh = sb_getblk(sb, block: p_blkno);
1040 if (!dbh) {
1041 status = -ENOMEM;
1042 mlog_errno(status);
1043 goto out_trans;
1044 }
1045 ocfs2_set_new_buffer_uptodate(ci: INODE_CACHE(inode: lqinode), bh: dbh);
1046 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: lqinode), bh: dbh,
1047 OCFS2_JOURNAL_ACCESS_CREATE);
1048 if (status < 0) {
1049 mlog_errno(status);
1050 goto out_trans;
1051 }
1052 lock_buffer(bh: dbh);
1053 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1054 unlock_buffer(bh: dbh);
1055 ocfs2_journal_dirty(handle, bh: dbh);
1056
1057 /* Update local quotafile info */
1058 oinfo->dqi_blocks += 2;
1059 oinfo->dqi_chunks++;
1060 status = ocfs2_local_write_info(sb, type);
1061 if (status < 0) {
1062 mlog_errno(status);
1063 goto out_trans;
1064 }
1065 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1066 if (status < 0) {
1067 mlog_errno(status);
1068 goto out;
1069 }
1070
1071 list_add_tail(new: &chunk->qc_chunk, head: &oinfo->dqi_chunk);
1072 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1073 struct ocfs2_quota_chunk,
1074 qc_chunk)->qc_num + 1;
1075 chunk->qc_headerbh = bh;
1076 *offset = 0;
1077 return chunk;
1078out_trans:
1079 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1080out:
1081 brelse(bh);
1082 brelse(bh: dbh);
1083 kmem_cache_free(s: ocfs2_qf_chunk_cachep, objp: chunk);
1084 return ERR_PTR(error: status);
1085}
1086
1087/* Find free entry in local quota file */
1088static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1089 struct super_block *sb,
1090 int type,
1091 int *offset)
1092{
1093 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1094 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1095 struct ocfs2_quota_chunk *chunk;
1096 struct inode *lqinode = sb_dqopt(sb)->files[type];
1097 struct ocfs2_local_disk_chunk *dchunk;
1098 int epb = ol_quota_entries_per_block(sb);
1099 unsigned int chunk_blocks;
1100 struct buffer_head *bh;
1101 u64 p_blkno;
1102 int status;
1103 handle_t *handle;
1104
1105 if (list_empty(head: &oinfo->dqi_chunk))
1106 return ocfs2_local_quota_add_chunk(sb, type, offset);
1107 /* Is the last chunk full? */
1108 chunk = list_entry(oinfo->dqi_chunk.prev,
1109 struct ocfs2_quota_chunk, qc_chunk);
1110 chunk_blocks = oinfo->dqi_blocks -
1111 ol_quota_chunk_block(sb, c: chunk->qc_num) - 1;
1112 if (ol_chunk_blocks(sb) == chunk_blocks)
1113 return ocfs2_local_quota_add_chunk(sb, type, offset);
1114
1115 /* We are protected by dqio_sem so no locking needed */
1116 status = ocfs2_extend_no_holes(inode: lqinode, NULL,
1117 new_i_size: i_size_read(inode: lqinode) + sb->s_blocksize,
1118 zero_to: i_size_read(inode: lqinode));
1119 if (status < 0) {
1120 mlog_errno(status);
1121 goto out;
1122 }
1123 status = ocfs2_simple_size_update(inode: lqinode, di_bh: oinfo->dqi_lqi_bh,
1124 new_i_size: i_size_read(inode: lqinode) + sb->s_blocksize);
1125 if (status < 0) {
1126 mlog_errno(status);
1127 goto out;
1128 }
1129
1130 /* Get buffer from the just added block */
1131 status = ocfs2_extent_map_get_blocks(inode: lqinode, v_blkno: oinfo->dqi_blocks,
1132 p_blkno: &p_blkno, NULL, NULL);
1133 if (status < 0) {
1134 mlog_errno(status);
1135 goto out;
1136 }
1137 bh = sb_getblk(sb, block: p_blkno);
1138 if (!bh) {
1139 status = -ENOMEM;
1140 mlog_errno(status);
1141 goto out;
1142 }
1143 ocfs2_set_new_buffer_uptodate(ci: INODE_CACHE(inode: lqinode), bh);
1144
1145 /* Local quota info, chunk header and the new block we initialize */
1146 handle = ocfs2_start_trans(OCFS2_SB(sb),
1147 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1148 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1149 if (IS_ERR(ptr: handle)) {
1150 status = PTR_ERR(ptr: handle);
1151 mlog_errno(status);
1152 goto out;
1153 }
1154 /* Zero created block */
1155 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: lqinode), bh,
1156 OCFS2_JOURNAL_ACCESS_CREATE);
1157 if (status < 0) {
1158 mlog_errno(status);
1159 goto out_trans;
1160 }
1161 lock_buffer(bh);
1162 memset(bh->b_data, 0, sb->s_blocksize);
1163 unlock_buffer(bh);
1164 ocfs2_journal_dirty(handle, bh);
1165
1166 /* Update chunk header */
1167 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: lqinode),
1168 bh: chunk->qc_headerbh,
1169 OCFS2_JOURNAL_ACCESS_WRITE);
1170 if (status < 0) {
1171 mlog_errno(status);
1172 goto out_trans;
1173 }
1174
1175 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1176 lock_buffer(bh: chunk->qc_headerbh);
1177 le32_add_cpu(var: &dchunk->dqc_free, val: ol_quota_entries_per_block(sb));
1178 unlock_buffer(bh: chunk->qc_headerbh);
1179 ocfs2_journal_dirty(handle, bh: chunk->qc_headerbh);
1180
1181 /* Update file header */
1182 oinfo->dqi_blocks++;
1183 status = ocfs2_local_write_info(sb, type);
1184 if (status < 0) {
1185 mlog_errno(status);
1186 goto out_trans;
1187 }
1188
1189 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1190 if (status < 0) {
1191 mlog_errno(status);
1192 goto out;
1193 }
1194 *offset = chunk_blocks * epb;
1195 return chunk;
1196out_trans:
1197 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1198out:
1199 return ERR_PTR(error: status);
1200}
1201
1202static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1203{
1204 int *offset = private;
1205 struct ocfs2_local_disk_chunk *dchunk;
1206
1207 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1208 ocfs2_set_bit_unaligned(bit: *offset, bitmap: dchunk->dqc_bitmap);
1209 le32_add_cpu(var: &dchunk->dqc_free, val: -1);
1210}
1211
1212/* Create dquot in the local file for given id */
1213int ocfs2_create_local_dquot(struct dquot *dquot)
1214{
1215 struct super_block *sb = dquot->dq_sb;
1216 int type = dquot->dq_id.type;
1217 struct inode *lqinode = sb_dqopt(sb)->files[type];
1218 struct ocfs2_quota_chunk *chunk;
1219 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1220 int offset;
1221 int status;
1222 u64 pcount;
1223
1224 down_write(sem: &OCFS2_I(inode: lqinode)->ip_alloc_sem);
1225 chunk = ocfs2_find_free_entry(sb, type, offset: &offset);
1226 if (!chunk) {
1227 chunk = ocfs2_extend_local_quota_file(sb, type, offset: &offset);
1228 if (IS_ERR(ptr: chunk)) {
1229 status = PTR_ERR(ptr: chunk);
1230 goto out;
1231 }
1232 } else if (IS_ERR(ptr: chunk)) {
1233 status = PTR_ERR(ptr: chunk);
1234 goto out;
1235 }
1236 od->dq_local_off = ol_dqblk_off(sb, c: chunk->qc_num, off: offset);
1237 od->dq_chunk = chunk;
1238 status = ocfs2_extent_map_get_blocks(inode: lqinode,
1239 v_blkno: ol_dqblk_block(sb, c: chunk->qc_num, off: offset),
1240 p_blkno: &od->dq_local_phys_blk,
1241 ret_count: &pcount,
1242 NULL);
1243 if (status < 0) {
1244 mlog_errno(status);
1245 goto out;
1246 }
1247
1248 /* Initialize dquot structure on disk */
1249 status = ocfs2_local_write_dquot(dquot);
1250 if (status < 0) {
1251 mlog_errno(status);
1252 goto out;
1253 }
1254
1255 /* Mark structure as allocated */
1256 status = ocfs2_modify_bh(inode: lqinode, bh: chunk->qc_headerbh, modify: olq_alloc_dquot,
1257 private: &offset);
1258 if (status < 0) {
1259 mlog_errno(status);
1260 goto out;
1261 }
1262out:
1263 up_write(sem: &OCFS2_I(inode: lqinode)->ip_alloc_sem);
1264 return status;
1265}
1266
1267/*
1268 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1269 * already started a transaction and written all changes to global quota file
1270 */
1271int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1272{
1273 int status;
1274 int type = dquot->dq_id.type;
1275 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1276 struct super_block *sb = dquot->dq_sb;
1277 struct ocfs2_local_disk_chunk *dchunk;
1278 int offset;
1279
1280 status = ocfs2_journal_access_dq(handle,
1281 ci: INODE_CACHE(inode: sb_dqopt(sb)->files[type]),
1282 bh: od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1283 if (status < 0) {
1284 mlog_errno(status);
1285 goto out;
1286 }
1287 offset = ol_dqblk_chunk_off(sb, c: od->dq_chunk->qc_num,
1288 off: od->dq_local_off);
1289 dchunk = (struct ocfs2_local_disk_chunk *)
1290 (od->dq_chunk->qc_headerbh->b_data);
1291 /* Mark structure as freed */
1292 lock_buffer(bh: od->dq_chunk->qc_headerbh);
1293 ocfs2_clear_bit_unaligned(bit: offset, bitmap: dchunk->dqc_bitmap);
1294 le32_add_cpu(var: &dchunk->dqc_free, val: 1);
1295 unlock_buffer(bh: od->dq_chunk->qc_headerbh);
1296 ocfs2_journal_dirty(handle, bh: od->dq_chunk->qc_headerbh);
1297
1298out:
1299 return status;
1300}
1301
1302static const struct quota_format_ops ocfs2_format_ops = {
1303 .check_quota_file = ocfs2_local_check_quota_file,
1304 .read_file_info = ocfs2_local_read_info,
1305 .write_file_info = ocfs2_global_write_info,
1306 .free_file_info = ocfs2_local_free_info,
1307};
1308
1309struct quota_format_type ocfs2_quota_format = {
1310 .qf_fmt_id = QFMT_OCFS2,
1311 .qf_ops = &ocfs2_format_ops,
1312 .qf_owner = THIS_MODULE
1313};
1314

source code of linux/fs/ocfs2/quota_local.c