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 unsigned int memalloc;
474
475 trace_ocfs2_recover_local_quota_file(val1: (unsigned long)lqinode->i_ino, val2: type);
476
477 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
478 chunk = rchunk->rc_chunk;
479 hbh = NULL;
480 status = ocfs2_read_quota_block(inode: lqinode,
481 v_block: ol_quota_chunk_block(sb, c: chunk),
482 bh: &hbh);
483 if (status) {
484 mlog_errno(status);
485 break;
486 }
487 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
488 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
489 qbh = NULL;
490 status = ocfs2_read_quota_block(inode: lqinode,
491 v_block: ol_dqblk_block(sb, c: chunk, off: bit),
492 bh: &qbh);
493 if (status) {
494 mlog_errno(status);
495 break;
496 }
497 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
498 ol_dqblk_block_off(sb, c: chunk, off: bit));
499 dquot = dqget(sb,
500 qid: make_kqid(from: &init_user_ns, type,
501 le64_to_cpu(dqblk->dqb_id)));
502 if (IS_ERR(ptr: dquot)) {
503 status = PTR_ERR(ptr: dquot);
504 mlog(ML_ERROR, "Failed to get quota structure "
505 "for id %u, type %d. Cannot finish quota "
506 "file recovery.\n",
507 (unsigned)le64_to_cpu(dqblk->dqb_id),
508 type);
509 goto out_put_bh;
510 }
511 status = ocfs2_lock_global_qf(oinfo, ex: 1);
512 if (status < 0) {
513 mlog_errno(status);
514 goto out_put_dquot;
515 }
516
517 handle = ocfs2_start_trans(OCFS2_SB(sb),
518 OCFS2_QSYNC_CREDITS);
519 if (IS_ERR(ptr: handle)) {
520 status = PTR_ERR(ptr: handle);
521 mlog_errno(status);
522 goto out_drop_lock;
523 }
524 down_write(sem: &sb_dqopt(sb)->dqio_sem);
525 memalloc = memalloc_nofs_save();
526 spin_lock(lock: &dquot->dq_dqb_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(lock: &dquot->dq_dqb_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 ci: INODE_CACHE(inode: lqinode),
546 bh: qbh, OCFS2_JOURNAL_ACCESS_WRITE);
547 if (status < 0) {
548 mlog_errno(status);
549 goto out_commit;
550 }
551 lock_buffer(bh: qbh);
552 WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
553 ocfs2_clear_bit_unaligned(bit, bitmap: dchunk->dqc_bitmap);
554 le32_add_cpu(var: &dchunk->dqc_free, val: 1);
555 unlock_buffer(bh: qbh);
556 ocfs2_journal_dirty(handle, bh: qbh);
557out_commit:
558 memalloc_nofs_restore(flags: memalloc);
559 up_write(sem: &sb_dqopt(sb)->dqio_sem);
560 ocfs2_commit_trans(OCFS2_SB(sb), handle);
561out_drop_lock:
562 ocfs2_unlock_global_qf(oinfo, ex: 1);
563out_put_dquot:
564 dqput(dquot);
565out_put_bh:
566 brelse(bh: qbh);
567 if (status < 0)
568 break;
569 }
570 brelse(bh: hbh);
571 list_del(entry: &rchunk->rc_list);
572 kfree(objp: rchunk->rc_bitmap);
573 kfree(objp: rchunk);
574 if (status < 0)
575 break;
576 }
577 if (status < 0)
578 free_recovery_list(head: &(rec->r_list[type]));
579 if (status)
580 mlog_errno(status);
581 return status;
582}
583
584/* Recover local quota files for given node different from us */
585int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
586 struct ocfs2_quota_recovery *rec,
587 int slot_num)
588{
589 unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
590 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
591 struct super_block *sb = osb->sb;
592 struct ocfs2_local_disk_dqinfo *ldinfo;
593 struct buffer_head *bh;
594 handle_t *handle;
595 int type;
596 int status = 0;
597 struct inode *lqinode;
598 unsigned int flags;
599
600 printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
601 "slot %u\n", osb->dev_str, slot_num);
602
603 down_read(sem: &sb->s_umount);
604 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
605 if (list_empty(head: &(rec->r_list[type])))
606 continue;
607 trace_ocfs2_finish_quota_recovery(num: slot_num);
608 lqinode = ocfs2_get_system_file_inode(osb, type: ino[type], slot: slot_num);
609 if (!lqinode) {
610 status = -ENOENT;
611 goto out;
612 }
613 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
614 OCFS2_META_LOCK_NOQUEUE);
615 /* Someone else is holding the lock? Then he must be
616 * doing the recovery. Just skip the file... */
617 if (status == -EAGAIN) {
618 printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
619 "device (%s) for slot %d because quota file is "
620 "locked.\n", osb->dev_str, slot_num);
621 status = 0;
622 goto out_put;
623 } else if (status < 0) {
624 mlog_errno(status);
625 goto out_put;
626 }
627 /* Now read local header */
628 bh = NULL;
629 status = ocfs2_read_quota_block(inode: lqinode, v_block: 0, bh: &bh);
630 if (status) {
631 mlog_errno(status);
632 mlog(ML_ERROR, "failed to read quota file info header "
633 "(slot=%d type=%d)\n", slot_num, type);
634 goto out_lock;
635 }
636 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
637 OCFS2_LOCAL_INFO_OFF);
638 /* Is recovery still needed? */
639 flags = le32_to_cpu(ldinfo->dqi_flags);
640 if (!(flags & OLQF_CLEAN))
641 status = ocfs2_recover_local_quota_file(lqinode,
642 type,
643 rec);
644 /* We don't want to mark file as clean when it is actually
645 * active */
646 if (slot_num == osb->slot_num)
647 goto out_bh;
648 /* Mark quota file as clean if we are recovering quota file of
649 * some other node. */
650 handle = ocfs2_start_trans(osb,
651 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
652 if (IS_ERR(ptr: handle)) {
653 status = PTR_ERR(ptr: handle);
654 mlog_errno(status);
655 goto out_bh;
656 }
657 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: lqinode),
658 bh,
659 OCFS2_JOURNAL_ACCESS_WRITE);
660 if (status < 0) {
661 mlog_errno(status);
662 goto out_trans;
663 }
664 lock_buffer(bh);
665 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
666 unlock_buffer(bh);
667 ocfs2_journal_dirty(handle, bh);
668out_trans:
669 ocfs2_commit_trans(osb, handle);
670out_bh:
671 brelse(bh);
672out_lock:
673 ocfs2_inode_unlock(inode: lqinode, ex: 1);
674out_put:
675 iput(lqinode);
676 if (status < 0)
677 break;
678 }
679out:
680 up_read(sem: &sb->s_umount);
681 kfree(objp: rec);
682 return status;
683}
684
685/* Read information header from quota file */
686static int ocfs2_local_read_info(struct super_block *sb, int type)
687{
688 struct ocfs2_local_disk_dqinfo *ldinfo;
689 struct mem_dqinfo *info = sb_dqinfo(sb, type);
690 struct ocfs2_mem_dqinfo *oinfo;
691 struct inode *lqinode = sb_dqopt(sb)->files[type];
692 int status;
693 struct buffer_head *bh = NULL;
694 struct ocfs2_quota_recovery *rec;
695 int locked = 0;
696
697 info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
698 info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
699 oinfo = kmalloc(size: 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(list: &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(inode: lqinode, v_block: 0, bh: &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 head: &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(inode: lqinode,
760 ldinfo,
761 head: &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(inode: lqinode, bh, modify: olq_update_info, private: info);
770 if (status < 0) {
771 mlog_errno(status);
772 goto out_err;
773 }
774
775 return 0;
776out_err:
777 if (oinfo) {
778 iput(oinfo->dqi_gqinode);
779 ocfs2_simple_drop_lockres(OCFS2_SB(sb), lockres: &oinfo->dqi_gqlock);
780 ocfs2_lock_res_free(res: &oinfo->dqi_gqlock);
781 brelse(bh: oinfo->dqi_lqi_bh);
782 if (locked)
783 ocfs2_inode_unlock(inode: lqinode, ex: 1);
784 ocfs2_release_local_quota_bitmaps(head: &oinfo->dqi_chunk);
785 kfree(objp: oinfo);
786 }
787 brelse(bh);
788 return -1;
789}
790
791/* Write local info to quota file */
792static int ocfs2_local_write_info(struct super_block *sb, int type)
793{
794 struct mem_dqinfo *info = sb_dqinfo(sb, type);
795 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
796 ->dqi_libh;
797 int status;
798
799 status = ocfs2_modify_bh(inode: sb_dqopt(sb)->files[type], bh, modify: olq_update_info,
800 private: info);
801 if (status < 0) {
802 mlog_errno(status);
803 return -1;
804 }
805
806 return 0;
807}
808
809/* Release info from memory */
810static int ocfs2_local_free_info(struct super_block *sb, int type)
811{
812 struct mem_dqinfo *info = sb_dqinfo(sb, type);
813 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
814 struct ocfs2_quota_chunk *chunk;
815 struct ocfs2_local_disk_chunk *dchunk;
816 int mark_clean = 1, len;
817 int status = 0;
818
819 iput(oinfo->dqi_gqinode);
820 ocfs2_simple_drop_lockres(OCFS2_SB(sb), lockres: &oinfo->dqi_gqlock);
821 ocfs2_lock_res_free(res: &oinfo->dqi_gqlock);
822 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
823 dchunk = (struct ocfs2_local_disk_chunk *)
824 (chunk->qc_headerbh->b_data);
825 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
826 len = ol_chunk_entries(sb);
827 } else {
828 len = (oinfo->dqi_blocks -
829 ol_quota_chunk_block(sb, c: chunk->qc_num) - 1)
830 * ol_quota_entries_per_block(sb);
831 }
832 /* Not all entries free? Bug! */
833 if (le32_to_cpu(dchunk->dqc_free) != len) {
834 mlog(ML_ERROR, "releasing quota file with used "
835 "entries (type=%d)\n", type);
836 mark_clean = 0;
837 }
838 }
839 ocfs2_release_local_quota_bitmaps(head: &oinfo->dqi_chunk);
840
841 /*
842 * s_umount held in exclusive mode protects us against racing with
843 * recovery thread...
844 */
845 if (oinfo->dqi_rec) {
846 ocfs2_free_quota_recovery(rec: oinfo->dqi_rec);
847 mark_clean = 0;
848 }
849
850 if (!mark_clean)
851 goto out;
852
853 /* Mark local file as clean */
854 oinfo->dqi_flags |= OLQF_CLEAN;
855 status = ocfs2_modify_bh(inode: sb_dqopt(sb)->files[type],
856 bh: oinfo->dqi_libh,
857 modify: olq_update_info,
858 private: info);
859 if (status < 0)
860 mlog_errno(status);
861out:
862 ocfs2_inode_unlock(inode: sb_dqopt(sb)->files[type], ex: 1);
863 brelse(bh: oinfo->dqi_libh);
864 brelse(bh: oinfo->dqi_lqi_bh);
865 kfree(objp: oinfo);
866 return status;
867}
868
869static void olq_set_dquot(struct buffer_head *bh, void *private)
870{
871 struct ocfs2_dquot *od = private;
872 struct ocfs2_local_disk_dqblk *dqblk;
873 struct super_block *sb = od->dq_dquot.dq_sb;
874
875 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
876 + ol_dqblk_block_offset(sb, off: od->dq_local_off));
877
878 dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
879 od->dq_dquot.dq_id));
880 spin_lock(lock: &od->dq_dquot.dq_dqb_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(lock: &od->dq_dquot.dq_dqb_lock);
886 trace_olq_set_dquot(
887 val1: (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
888 val2: (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
889 val3: from_kqid(to: &init_user_ns, qid: od->dq_dquot.dq_id));
890}
891
892/* Write dquot to local quota file */
893int 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_id.type];
899 int status;
900
901 status = ocfs2_read_quota_phys_block(inode: lqinode, p_block: od->dq_local_phys_blk,
902 bh: &bh);
903 if (status) {
904 mlog_errno(status);
905 goto out;
906 }
907 status = ocfs2_modify_bh(inode: lqinode, bh, modify: olq_set_dquot, private: od);
908 if (status < 0) {
909 mlog_errno(status);
910 goto out;
911 }
912out:
913 brelse(bh);
914 return status;
915}
916
917/* Find free entry in local quota file */
918static 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 = NULL, *iter;
925 struct ocfs2_local_disk_chunk *dchunk;
926 int found = 0, len;
927
928 list_for_each_entry(iter, &oinfo->dqi_chunk, qc_chunk) {
929 dchunk = (struct ocfs2_local_disk_chunk *)
930 iter->qc_headerbh->b_data;
931 if (le32_to_cpu(dchunk->dqc_free) > 0) {
932 chunk = iter;
933 break;
934 }
935 }
936 if (!chunk)
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, c: chunk->qc_num) - 1)
944 * ol_quota_entries_per_block(sb);
945 }
946
947 found = ocfs2_find_next_zero_bit_unaligned(bitmap: dchunk->dqc_bitmap, max: len, start: 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(error: -EIO);
954 }
955 *offset = found;
956 return chunk;
957}
958
959/* Add new chunk to the local quota file */
960static 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(inode: lqinode, NULL,
977 new_i_size: i_size_read(inode: lqinode) + 2 * sb->s_blocksize,
978 zero_to: i_size_read(inode: lqinode));
979 if (status < 0) {
980 mlog_errno(status);
981 goto out;
982 }
983 status = ocfs2_simple_size_update(inode: lqinode, di_bh: oinfo->dqi_lqi_bh,
984 new_i_size: i_size_read(inode: lqinode) + 2 * sb->s_blocksize);
985 if (status < 0) {
986 mlog_errno(status);
987 goto out;
988 }
989
990 chunk = kmem_cache_alloc(cachep: 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(ptr: handle)) {
1001 status = PTR_ERR(ptr: handle);
1002 mlog_errno(status);
1003 goto out;
1004 }
1005
1006 /* Initialize chunk header */
1007 status = ocfs2_extent_map_get_blocks(inode: lqinode, v_blkno: oinfo->dqi_blocks,
1008 p_blkno: &p_blkno, NULL, NULL);
1009 if (status < 0) {
1010 mlog_errno(status);
1011 goto out_trans;
1012 }
1013 bh = sb_getblk(sb, block: 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(ci: INODE_CACHE(inode: lqinode), bh);
1021 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: 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(inode: lqinode, v_blkno: oinfo->dqi_blocks + 1,
1037 p_blkno: &p_blkno, NULL, NULL);
1038 if (status < 0) {
1039 mlog_errno(status);
1040 goto out_trans;
1041 }
1042 dbh = sb_getblk(sb, block: p_blkno);
1043 if (!dbh) {
1044 status = -ENOMEM;
1045 mlog_errno(status);
1046 goto out_trans;
1047 }
1048 ocfs2_set_new_buffer_uptodate(ci: INODE_CACHE(inode: lqinode), bh: dbh);
1049 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: lqinode), bh: dbh,
1050 OCFS2_JOURNAL_ACCESS_CREATE);
1051 if (status < 0) {
1052 mlog_errno(status);
1053 goto out_trans;
1054 }
1055 lock_buffer(bh: dbh);
1056 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1057 unlock_buffer(bh: dbh);
1058 ocfs2_journal_dirty(handle, bh: 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(new: &chunk->qc_chunk, head: &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;
1081out_trans:
1082 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1083out:
1084 brelse(bh);
1085 brelse(bh: dbh);
1086 kmem_cache_free(s: ocfs2_qf_chunk_cachep, objp: chunk);
1087 return ERR_PTR(error: status);
1088}
1089
1090/* Find free entry in local quota file */
1091static 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(head: &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, c: 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(inode: lqinode, NULL,
1120 new_i_size: i_size_read(inode: lqinode) + sb->s_blocksize,
1121 zero_to: i_size_read(inode: lqinode));
1122 if (status < 0) {
1123 mlog_errno(status);
1124 goto out;
1125 }
1126 status = ocfs2_simple_size_update(inode: lqinode, di_bh: oinfo->dqi_lqi_bh,
1127 new_i_size: i_size_read(inode: lqinode) + 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(inode: lqinode, v_blkno: oinfo->dqi_blocks,
1135 p_blkno: &p_blkno, NULL, NULL);
1136 if (status < 0) {
1137 mlog_errno(status);
1138 goto out;
1139 }
1140 bh = sb_getblk(sb, block: p_blkno);
1141 if (!bh) {
1142 status = -ENOMEM;
1143 mlog_errno(status);
1144 goto out;
1145 }
1146 ocfs2_set_new_buffer_uptodate(ci: INODE_CACHE(inode: 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(ptr: handle)) {
1153 status = PTR_ERR(ptr: handle);
1154 mlog_errno(status);
1155 goto out;
1156 }
1157 /* Zero created block */
1158 status = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: 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, ci: INODE_CACHE(inode: lqinode),
1171 bh: 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(bh: chunk->qc_headerbh);
1180 le32_add_cpu(var: &dchunk->dqc_free, val: ol_quota_entries_per_block(sb));
1181 unlock_buffer(bh: chunk->qc_headerbh);
1182 ocfs2_journal_dirty(handle, bh: 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;
1199out_trans:
1200 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1201out:
1202 return ERR_PTR(error: status);
1203}
1204
1205static 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_unaligned(bit: *offset, bitmap: dchunk->dqc_bitmap);
1212 le32_add_cpu(var: &dchunk->dqc_free, val: -1);
1213}
1214
1215/* Create dquot in the local file for given id */
1216int ocfs2_create_local_dquot(struct dquot *dquot)
1217{
1218 struct super_block *sb = dquot->dq_sb;
1219 int type = dquot->dq_id.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(sem: &OCFS2_I(inode: lqinode)->ip_alloc_sem);
1228 chunk = ocfs2_find_free_entry(sb, type, offset: &offset);
1229 if (!chunk) {
1230 chunk = ocfs2_extend_local_quota_file(sb, type, offset: &offset);
1231 if (IS_ERR(ptr: chunk)) {
1232 status = PTR_ERR(ptr: chunk);
1233 goto out;
1234 }
1235 } else if (IS_ERR(ptr: chunk)) {
1236 status = PTR_ERR(ptr: chunk);
1237 goto out;
1238 }
1239 od->dq_local_off = ol_dqblk_off(sb, c: chunk->qc_num, off: offset);
1240 od->dq_chunk = chunk;
1241 status = ocfs2_extent_map_get_blocks(inode: lqinode,
1242 v_blkno: ol_dqblk_block(sb, c: chunk->qc_num, off: offset),
1243 p_blkno: &od->dq_local_phys_blk,
1244 ret_count: &pcount,
1245 NULL);
1246 if (status < 0) {
1247 mlog_errno(status);
1248 goto out;
1249 }
1250
1251 /* Initialize dquot structure on disk */
1252 status = ocfs2_local_write_dquot(dquot);
1253 if (status < 0) {
1254 mlog_errno(status);
1255 goto out;
1256 }
1257
1258 /* Mark structure as allocated */
1259 status = ocfs2_modify_bh(inode: lqinode, bh: chunk->qc_headerbh, modify: olq_alloc_dquot,
1260 private: &offset);
1261 if (status < 0) {
1262 mlog_errno(status);
1263 goto out;
1264 }
1265out:
1266 up_write(sem: &OCFS2_I(inode: lqinode)->ip_alloc_sem);
1267 return status;
1268}
1269
1270/*
1271 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1272 * already started a transaction and written all changes to global quota file
1273 */
1274int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1275{
1276 int status;
1277 int type = dquot->dq_id.type;
1278 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1279 struct super_block *sb = dquot->dq_sb;
1280 struct ocfs2_local_disk_chunk *dchunk;
1281 int offset;
1282
1283 status = ocfs2_journal_access_dq(handle,
1284 ci: INODE_CACHE(inode: sb_dqopt(sb)->files[type]),
1285 bh: od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1286 if (status < 0) {
1287 mlog_errno(status);
1288 goto out;
1289 }
1290 offset = ol_dqblk_chunk_off(sb, c: od->dq_chunk->qc_num,
1291 off: od->dq_local_off);
1292 dchunk = (struct ocfs2_local_disk_chunk *)
1293 (od->dq_chunk->qc_headerbh->b_data);
1294 /* Mark structure as freed */
1295 lock_buffer(bh: od->dq_chunk->qc_headerbh);
1296 ocfs2_clear_bit_unaligned(bit: offset, bitmap: dchunk->dqc_bitmap);
1297 le32_add_cpu(var: &dchunk->dqc_free, val: 1);
1298 unlock_buffer(bh: od->dq_chunk->qc_headerbh);
1299 ocfs2_journal_dirty(handle, bh: od->dq_chunk->qc_headerbh);
1300
1301out:
1302 return status;
1303}
1304
1305static 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
1312struct quota_format_type ocfs2_quota_format = {
1313 .qf_fmt_id = QFMT_OCFS2,
1314 .qf_ops = &ocfs2_format_ops,
1315 .qf_owner = THIS_MODULE
1316};
1317

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