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fs: take i_mutex during prepare_binprm for set[ug]id executables
[linux/fpc-iii.git] / fs / ocfs2 / quota_local.c
blob465223b7592ed07a02cf373119336a75690a9926
1 /*
2 * Implementation of operations over local quota file
3 */
4
5 #include <linux/fs.h>
6 #include <linux/slab.h>
7 #include <linux/quota.h>
8 #include <linux/quotaops.h>
9 #include <linux/module.h>
10
11 #include <cluster/masklog.h>
12
13 #include "ocfs2_fs.h"
14 #include "ocfs2.h"
15 #include "inode.h"
16 #include "alloc.h"
17 #include "file.h"
18 #include "buffer_head_io.h"
19 #include "journal.h"
20 #include "sysfile.h"
21 #include "dlmglue.h"
22 #include "quota.h"
23 #include "uptodate.h"
24 #include "super.h"
25 #include "ocfs2_trace.h"
26
27 /* Number of local quota structures per block */
28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
29 {
30 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
31 sizeof(struct ocfs2_local_disk_dqblk));
32 }
33
34 /* Number of blocks with entries in one chunk */
35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
36 {
37 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
38 OCFS2_QBLK_RESERVED_SPACE) << 3) /
39 ol_quota_entries_per_block(sb);
40 }
41
42 /* Number of entries in a chunk bitmap */
43 static unsigned int ol_chunk_entries(struct super_block *sb)
44 {
45 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
46 }
47
48 /* Offset of the chunk in quota file */
49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
50 {
51 /* 1 block for local quota file info, 1 block per chunk for chunk info */
52 return 1 + (ol_chunk_blocks(sb) + 1) * c;
53 }
54
55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
56 {
57 int epb = ol_quota_entries_per_block(sb);
58
59 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
60 }
61
62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
63 {
64 int epb = ol_quota_entries_per_block(sb);
65
66 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
67 }
68
69 /* Offset of the dquot structure in the quota file */
70 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
71 {
72 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
73 ol_dqblk_block_off(sb, c, off);
74 }
75
76 /* Compute block number from given offset */
77 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
78 {
79 return off >> sb->s_blocksize_bits;
80 }
81
82 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
83 {
84 return off & ((1 << sb->s_blocksize_bits) - 1);
85 }
86
87 /* Compute offset in the chunk of a structure with the given offset */
88 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
89 {
90 int epb = ol_quota_entries_per_block(sb);
91
92 return ((off >> sb->s_blocksize_bits) -
93 ol_quota_chunk_block(sb, c) - 1) * epb
94 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
95 sizeof(struct ocfs2_local_disk_dqblk);
96 }
97
98 /* Write bufferhead into the fs */
99 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
100 void (*modify)(struct buffer_head *, void *), void *private)
101 {
102 struct super_block *sb = inode->i_sb;
103 handle_t *handle;
104 int status;
105
106 handle = ocfs2_start_trans(OCFS2_SB(sb),
107 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
108 if (IS_ERR(handle)) {
109 status = PTR_ERR(handle);
110 mlog_errno(status);
111 return status;
112 }
113 status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
114 OCFS2_JOURNAL_ACCESS_WRITE);
115 if (status < 0) {
116 mlog_errno(status);
117 ocfs2_commit_trans(OCFS2_SB(sb), handle);
118 return status;
119 }
120 lock_buffer(bh);
121 modify(bh, private);
122 unlock_buffer(bh);
123 ocfs2_journal_dirty(handle, bh);
124
125 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
126 if (status < 0) {
127 mlog_errno(status);
128 return status;
129 }
130 return 0;
131 }
132
133 /*
134 * Read quota block from a given logical offset.
135 *
136 * This function acquires ip_alloc_sem and thus it must not be called with a
137 * transaction started.
138 */
139 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
140 struct buffer_head **bh)
141 {
142 int rc = 0;
143 struct buffer_head *tmp = *bh;
144
145 if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
146 ocfs2_error(inode->i_sb,
147 "Quota file %llu is probably corrupted! Requested "
148 "to read block %Lu but file has size only %Lu\n",
149 (unsigned long long)OCFS2_I(inode)->ip_blkno,
150 (unsigned long long)v_block,
151 (unsigned long long)i_size_read(inode));
152 return -EIO;
153 }
154 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
155 ocfs2_validate_quota_block);
156 if (rc)
157 mlog_errno(rc);
158
159 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
160 if (!rc && !*bh)
161 *bh = tmp;
162
163 return rc;
164 }
165
166 /* Check whether we understand format of quota files */
167 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
168 {
169 unsigned int lmagics[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
170 unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
171 unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
172 unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
173 unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
174 GROUP_QUOTA_SYSTEM_INODE };
175 struct buffer_head *bh = NULL;
176 struct inode *linode = sb_dqopt(sb)->files[type];
177 struct inode *ginode = NULL;
178 struct ocfs2_disk_dqheader *dqhead;
179 int status, ret = 0;
180
181 /* First check whether we understand local quota file */
182 status = ocfs2_read_quota_block(linode, 0, &bh);
183 if (status) {
184 mlog_errno(status);
185 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
186 type);
187 goto out_err;
188 }
189 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
190 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
191 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
192 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
193 lmagics[type], type);
194 goto out_err;
195 }
196 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
197 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
198 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
199 lversions[type], type);
200 goto out_err;
201 }
202 brelse(bh);
203 bh = NULL;
204
205 /* Next check whether we understand global quota file */
206 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
207 OCFS2_INVALID_SLOT);
208 if (!ginode) {
209 mlog(ML_ERROR, "cannot get global quota file inode "
210 "(type=%d)\n", type);
211 goto out_err;
212 }
213 /* Since the header is read only, we don't care about locking */
214 status = ocfs2_read_quota_block(ginode, 0, &bh);
215 if (status) {
216 mlog_errno(status);
217 mlog(ML_ERROR, "failed to read global quota file header "
218 "(type=%d)\n", type);
219 goto out_err;
220 }
221 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
222 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
223 mlog(ML_ERROR, "global quota file magic does not match "
224 "(%u != %u), type=%d\n",
225 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
226 goto out_err;
227 }
228 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
229 mlog(ML_ERROR, "global quota file version does not match "
230 "(%u != %u), type=%d\n",
231 le32_to_cpu(dqhead->dqh_version), gversions[type],
232 type);
233 goto out_err;
234 }
235
236 ret = 1;
237 out_err:
238 brelse(bh);
239 iput(ginode);
240 return ret;
241 }
242
243 /* Release given list of quota file chunks */
244 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
245 {
246 struct ocfs2_quota_chunk *pos, *next;
247
248 list_for_each_entry_safe(pos, next, head, qc_chunk) {
249 list_del(&pos->qc_chunk);
250 brelse(pos->qc_headerbh);
251 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
252 }
253 }
254
255 /* Load quota bitmaps into memory */
256 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
257 struct ocfs2_local_disk_dqinfo *ldinfo,
258 struct list_head *head)
259 {
260 struct ocfs2_quota_chunk *newchunk;
261 int i, status;
262
263 INIT_LIST_HEAD(head);
264 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
265 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
266 if (!newchunk) {
267 ocfs2_release_local_quota_bitmaps(head);
268 return -ENOMEM;
269 }
270 newchunk->qc_num = i;
271 newchunk->qc_headerbh = NULL;
272 status = ocfs2_read_quota_block(inode,
273 ol_quota_chunk_block(inode->i_sb, i),
274 &newchunk->qc_headerbh);
275 if (status) {
276 mlog_errno(status);
277 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
278 ocfs2_release_local_quota_bitmaps(head);
279 return status;
280 }
281 list_add_tail(&newchunk->qc_chunk, head);
282 }
283 return 0;
284 }
285
286 static void olq_update_info(struct buffer_head *bh, void *private)
287 {
288 struct mem_dqinfo *info = private;
289 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
290 struct ocfs2_local_disk_dqinfo *ldinfo;
291
292 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
293 OCFS2_LOCAL_INFO_OFF);
294 spin_lock(&dq_data_lock);
295 ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
296 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
297 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
298 spin_unlock(&dq_data_lock);
299 }
300
301 static int ocfs2_add_recovery_chunk(struct super_block *sb,
302 struct ocfs2_local_disk_chunk *dchunk,
303 int chunk,
304 struct list_head *head)
305 {
306 struct ocfs2_recovery_chunk *rc;
307
308 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
309 if (!rc)
310 return -ENOMEM;
311 rc->rc_chunk = chunk;
312 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
313 if (!rc->rc_bitmap) {
314 kfree(rc);
315 return -ENOMEM;
316 }
317 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
318 (ol_chunk_entries(sb) + 7) >> 3);
319 list_add_tail(&rc->rc_list, head);
320 return 0;
321 }
322
323 static void free_recovery_list(struct list_head *head)
324 {
325 struct ocfs2_recovery_chunk *next;
326 struct ocfs2_recovery_chunk *rchunk;
327
328 list_for_each_entry_safe(rchunk, next, head, rc_list) {
329 list_del(&rchunk->rc_list);
330 kfree(rchunk->rc_bitmap);
331 kfree(rchunk);
332 }
333 }
334
335 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
336 {
337 int type;
338
339 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
340 free_recovery_list(&(rec->r_list[type]));
341 kfree(rec);
342 }
343
344 /* Load entries in our quota file we have to recover*/
345 static int ocfs2_recovery_load_quota(struct inode *lqinode,
346 struct ocfs2_local_disk_dqinfo *ldinfo,
347 int type,
348 struct list_head *head)
349 {
350 struct super_block *sb = lqinode->i_sb;
351 struct buffer_head *hbh;
352 struct ocfs2_local_disk_chunk *dchunk;
353 int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
354 int status = 0;
355
356 for (i = 0; i < chunks; i++) {
357 hbh = NULL;
358 status = ocfs2_read_quota_block(lqinode,
359 ol_quota_chunk_block(sb, i),
360 &hbh);
361 if (status) {
362 mlog_errno(status);
363 break;
364 }
365 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
366 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
367 status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
368 brelse(hbh);
369 if (status < 0)
370 break;
371 }
372 if (status < 0)
373 free_recovery_list(head);
374 return status;
375 }
376
377 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
378 {
379 int type;
380 struct ocfs2_quota_recovery *rec;
381
382 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
383 if (!rec)
384 return NULL;
385 for (type = 0; type < OCFS2_MAXQUOTAS; type++)
386 INIT_LIST_HEAD(&(rec->r_list[type]));
387 return rec;
388 }
389
390 /* Load information we need for quota recovery into memory */
391 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
392 struct ocfs2_super *osb,
393 int slot_num)
394 {
395 unsigned int feature[OCFS2_MAXQUOTAS] = {
396 OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
397 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
398 unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
399 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
400 struct super_block *sb = osb->sb;
401 struct ocfs2_local_disk_dqinfo *ldinfo;
402 struct inode *lqinode;
403 struct buffer_head *bh;
404 int type;
405 int status = 0;
406 struct ocfs2_quota_recovery *rec;
407
408 printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
409 "slot %u\n", osb->dev_str, slot_num);
410
411 rec = ocfs2_alloc_quota_recovery();
412 if (!rec)
413 return ERR_PTR(-ENOMEM);
414 /* First init... */
415
416 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
417 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
418 continue;
419 /* At this point, journal of the slot is already replayed so
420 * we can trust metadata and data of the quota file */
421 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
422 if (!lqinode) {
423 status = -ENOENT;
424 goto out;
425 }
426 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
427 OCFS2_META_LOCK_RECOVERY);
428 if (status < 0) {
429 mlog_errno(status);
430 goto out_put;
431 }
432 /* Now read local header */
433 bh = NULL;
434 status = ocfs2_read_quota_block(lqinode, 0, &bh);
435 if (status) {
436 mlog_errno(status);
437 mlog(ML_ERROR, "failed to read quota file info header "
438 "(slot=%d type=%d)\n", slot_num, type);
439 goto out_lock;
440 }
441 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
442 OCFS2_LOCAL_INFO_OFF);
443 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
444 &rec->r_list[type]);
445 brelse(bh);
446 out_lock:
447 ocfs2_inode_unlock(lqinode, 1);
448 out_put:
449 iput(lqinode);
450 if (status < 0)
451 break;
452 }
453 out:
454 if (status < 0) {
455 ocfs2_free_quota_recovery(rec);
456 rec = ERR_PTR(status);
457 }
458 return rec;
459 }
460
461 /* Sync changes in local quota file into global quota file and
462 * reinitialize local quota file.
463 * The function expects local quota file to be already locked and
464 * dqonoff_mutex locked. */
465 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
466 int type,
467 struct ocfs2_quota_recovery *rec)
468 {
469 struct super_block *sb = lqinode->i_sb;
470 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
471 struct ocfs2_local_disk_chunk *dchunk;
472 struct ocfs2_local_disk_dqblk *dqblk;
473 struct dquot *dquot;
474 handle_t *handle;
475 struct buffer_head *hbh = NULL, *qbh = NULL;
476 int status = 0;
477 int bit, chunk;
478 struct ocfs2_recovery_chunk *rchunk, *next;
479 qsize_t spacechange, inodechange;
480
481 trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
482
483 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
484 chunk = rchunk->rc_chunk;
485 hbh = NULL;
486 status = ocfs2_read_quota_block(lqinode,
487 ol_quota_chunk_block(sb, chunk),
488 &hbh);
489 if (status) {
490 mlog_errno(status);
491 break;
492 }
493 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
494 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
495 qbh = NULL;
496 status = ocfs2_read_quota_block(lqinode,
497 ol_dqblk_block(sb, chunk, bit),
498 &qbh);
499 if (status) {
500 mlog_errno(status);
501 break;
502 }
503 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
504 ol_dqblk_block_off(sb, chunk, bit));
505 dquot = dqget(sb,
506 make_kqid(&init_user_ns, type,
507 le64_to_cpu(dqblk->dqb_id)));
508 if (!dquot) {
509 status = -EIO;
510 mlog(ML_ERROR, "Failed to get quota structure "
511 "for id %u, type %d. Cannot finish quota "
512 "file recovery.\n",
513 (unsigned)le64_to_cpu(dqblk->dqb_id),
514 type);
515 goto out_put_bh;
516 }
517 status = ocfs2_lock_global_qf(oinfo, 1);
518 if (status < 0) {
519 mlog_errno(status);
520 goto out_put_dquot;
521 }
522
523 handle = ocfs2_start_trans(OCFS2_SB(sb),
524 OCFS2_QSYNC_CREDITS);
525 if (IS_ERR(handle)) {
526 status = PTR_ERR(handle);
527 mlog_errno(status);
528 goto out_drop_lock;
529 }
530 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
531 spin_lock(&dq_data_lock);
532 /* Add usage from quota entry into quota changes
533 * of our node. Auxiliary variables are important
534 * due to signedness */
535 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
536 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
537 dquot->dq_dqb.dqb_curspace += spacechange;
538 dquot->dq_dqb.dqb_curinodes += inodechange;
539 spin_unlock(&dq_data_lock);
540 /* We want to drop reference held by the crashed
541 * node. Since we have our own reference we know
542 * global structure actually won't be freed. */
543 status = ocfs2_global_release_dquot(dquot);
544 if (status < 0) {
545 mlog_errno(status);
546 goto out_commit;
547 }
548 /* Release local quota file entry */
549 status = ocfs2_journal_access_dq(handle,
550 INODE_CACHE(lqinode),
551 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
552 if (status < 0) {
553 mlog_errno(status);
554 goto out_commit;
555 }
556 lock_buffer(qbh);
557 WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
558 ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
559 le32_add_cpu(&dchunk->dqc_free, 1);
560 unlock_buffer(qbh);
561 ocfs2_journal_dirty(handle, qbh);
562 out_commit:
563 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
564 ocfs2_commit_trans(OCFS2_SB(sb), handle);
565 out_drop_lock:
566 ocfs2_unlock_global_qf(oinfo, 1);
567 out_put_dquot:
568 dqput(dquot);
569 out_put_bh:
570 brelse(qbh);
571 if (status < 0)
572 break;
573 }
574 brelse(hbh);
575 list_del(&rchunk->rc_list);
576 kfree(rchunk->rc_bitmap);
577 kfree(rchunk);
578 if (status < 0)
579 break;
580 }
581 if (status < 0)
582 free_recovery_list(&(rec->r_list[type]));
583 if (status)
584 mlog_errno(status);
585 return status;
586 }
587
588 /* Recover local quota files for given node different from us */
589 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
590 struct ocfs2_quota_recovery *rec,
591 int slot_num)
592 {
593 unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
594 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
595 struct super_block *sb = osb->sb;
596 struct ocfs2_local_disk_dqinfo *ldinfo;
597 struct buffer_head *bh;
598 handle_t *handle;
599 int type;
600 int status = 0;
601 struct inode *lqinode;
602 unsigned int flags;
603
604 printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
605 "slot %u\n", osb->dev_str, slot_num);
606
607 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
608 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
609 if (list_empty(&(rec->r_list[type])))
610 continue;
611 trace_ocfs2_finish_quota_recovery(slot_num);
612 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
613 if (!lqinode) {
614 status = -ENOENT;
615 goto out;
616 }
617 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
618 OCFS2_META_LOCK_NOQUEUE);
619 /* Someone else is holding the lock? Then he must be
620 * doing the recovery. Just skip the file... */
621 if (status == -EAGAIN) {
622 printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
623 "device (%s) for slot %d because quota file is "
624 "locked.\n", osb->dev_str, slot_num);
625 status = 0;
626 goto out_put;
627 } else if (status < 0) {
628 mlog_errno(status);
629 goto out_put;
630 }
631 /* Now read local header */
632 bh = NULL;
633 status = ocfs2_read_quota_block(lqinode, 0, &bh);
634 if (status) {
635 mlog_errno(status);
636 mlog(ML_ERROR, "failed to read quota file info header "
637 "(slot=%d type=%d)\n", slot_num, type);
638 goto out_lock;
639 }
640 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
641 OCFS2_LOCAL_INFO_OFF);
642 /* Is recovery still needed? */
643 flags = le32_to_cpu(ldinfo->dqi_flags);
644 if (!(flags & OLQF_CLEAN))
645 status = ocfs2_recover_local_quota_file(lqinode,
646 type,
647 rec);
648 /* We don't want to mark file as clean when it is actually
649 * active */
650 if (slot_num == osb->slot_num)
651 goto out_bh;
652 /* Mark quota file as clean if we are recovering quota file of
653 * some other node. */
654 handle = ocfs2_start_trans(osb,
655 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
656 if (IS_ERR(handle)) {
657 status = PTR_ERR(handle);
658 mlog_errno(status);
659 goto out_bh;
660 }
661 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
662 bh,
663 OCFS2_JOURNAL_ACCESS_WRITE);
664 if (status < 0) {
665 mlog_errno(status);
666 goto out_trans;
667 }
668 lock_buffer(bh);
669 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
670 unlock_buffer(bh);
671 ocfs2_journal_dirty(handle, bh);
672 out_trans:
673 ocfs2_commit_trans(osb, handle);
674 out_bh:
675 brelse(bh);
676 out_lock:
677 ocfs2_inode_unlock(lqinode, 1);
678 out_put:
679 iput(lqinode);
680 if (status < 0)
681 break;
682 }
683 out:
684 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
685 kfree(rec);
686 return status;
687 }
688
689 /* Read information header from quota file */
690 static int ocfs2_local_read_info(struct super_block *sb, int type)
691 {
692 struct ocfs2_local_disk_dqinfo *ldinfo;
693 struct mem_dqinfo *info = sb_dqinfo(sb, type);
694 struct ocfs2_mem_dqinfo *oinfo;
695 struct inode *lqinode = sb_dqopt(sb)->files[type];
696 int status;
697 struct buffer_head *bh = NULL;
698 struct ocfs2_quota_recovery *rec;
699 int locked = 0;
700
701 /* We don't need the lock and we have to acquire quota file locks
702 * which will later depend on this lock */
703 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
704 info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
705 info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
706 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
707 if (!oinfo) {
708 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
709 " info.");
710 goto out_err;
711 }
712 info->dqi_priv = oinfo;
713 oinfo->dqi_type = type;
714 INIT_LIST_HEAD(&oinfo->dqi_chunk);
715 oinfo->dqi_rec = NULL;
716 oinfo->dqi_lqi_bh = NULL;
717 oinfo->dqi_libh = NULL;
718
719 status = ocfs2_global_read_info(sb, type);
720 if (status < 0)
721 goto out_err;
722
723 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
724 if (status < 0) {
725 mlog_errno(status);
726 goto out_err;
727 }
728 locked = 1;
729
730 /* Now read local header */
731 status = ocfs2_read_quota_block(lqinode, 0, &bh);
732 if (status) {
733 mlog_errno(status);
734 mlog(ML_ERROR, "failed to read quota file info header "
735 "(type=%d)\n", type);
736 goto out_err;
737 }
738 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
739 OCFS2_LOCAL_INFO_OFF);
740 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
741 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
742 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
743 oinfo->dqi_libh = bh;
744
745 /* We crashed when using local quota file? */
746 if (!(info->dqi_flags & OLQF_CLEAN)) {
747 rec = OCFS2_SB(sb)->quota_rec;
748 if (!rec) {
749 rec = ocfs2_alloc_quota_recovery();
750 if (!rec) {
751 status = -ENOMEM;
752 mlog_errno(status);
753 goto out_err;
754 }
755 OCFS2_SB(sb)->quota_rec = rec;
756 }
757
758 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
759 &rec->r_list[type]);
760 if (status < 0) {
761 mlog_errno(status);
762 goto out_err;
763 }
764 }
765
766 status = ocfs2_load_local_quota_bitmaps(lqinode,
767 ldinfo,
768 &oinfo->dqi_chunk);
769 if (status < 0) {
770 mlog_errno(status);
771 goto out_err;
772 }
773
774 /* Now mark quota file as used */
775 info->dqi_flags &= ~OLQF_CLEAN;
776 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
777 if (status < 0) {
778 mlog_errno(status);
779 goto out_err;
780 }
781
782 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
783 return 0;
784 out_err:
785 if (oinfo) {
786 iput(oinfo->dqi_gqinode);
787 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
788 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
789 brelse(oinfo->dqi_lqi_bh);
790 if (locked)
791 ocfs2_inode_unlock(lqinode, 1);
792 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
793 kfree(oinfo);
794 }
795 brelse(bh);
796 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
797 return -1;
798 }
799
800 /* Write local info to quota file */
801 static int ocfs2_local_write_info(struct super_block *sb, int type)
802 {
803 struct mem_dqinfo *info = sb_dqinfo(sb, type);
804 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
805 ->dqi_libh;
806 int status;
807
808 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
809 info);
810 if (status < 0) {
811 mlog_errno(status);
812 return -1;
813 }
814
815 return 0;
816 }
817
818 /* Release info from memory */
819 static int ocfs2_local_free_info(struct super_block *sb, int type)
820 {
821 struct mem_dqinfo *info = sb_dqinfo(sb, type);
822 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
823 struct ocfs2_quota_chunk *chunk;
824 struct ocfs2_local_disk_chunk *dchunk;
825 int mark_clean = 1, len;
826 int status;
827
828 iput(oinfo->dqi_gqinode);
829 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
830 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
831 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
832 dchunk = (struct ocfs2_local_disk_chunk *)
833 (chunk->qc_headerbh->b_data);
834 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
835 len = ol_chunk_entries(sb);
836 } else {
837 len = (oinfo->dqi_blocks -
838 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
839 * ol_quota_entries_per_block(sb);
840 }
841 /* Not all entries free? Bug! */
842 if (le32_to_cpu(dchunk->dqc_free) != len) {
843 mlog(ML_ERROR, "releasing quota file with used "
844 "entries (type=%d)\n", type);
845 mark_clean = 0;
846 }
847 }
848 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
849
850 /* dqonoff_mutex protects us against racing with recovery thread... */
851 if (oinfo->dqi_rec) {
852 ocfs2_free_quota_recovery(oinfo->dqi_rec);
853 mark_clean = 0;
854 }
855
856 if (!mark_clean)
857 goto out;
858
859 /* Mark local file as clean */
860 info->dqi_flags |= OLQF_CLEAN;
861 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
862 oinfo->dqi_libh,
863 olq_update_info,
864 info);
865 if (status < 0) {
866 mlog_errno(status);
867 goto out;
868 }
869
870 out:
871 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
872 brelse(oinfo->dqi_libh);
873 brelse(oinfo->dqi_lqi_bh);
874 kfree(oinfo);
875 return 0;
876 }
877
878 static void olq_set_dquot(struct buffer_head *bh, void *private)
879 {
880 struct ocfs2_dquot *od = private;
881 struct ocfs2_local_disk_dqblk *dqblk;
882 struct super_block *sb = od->dq_dquot.dq_sb;
883
884 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
885 + ol_dqblk_block_offset(sb, od->dq_local_off));
886
887 dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
888 od->dq_dquot.dq_id));
889 spin_lock(&dq_data_lock);
890 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
891 od->dq_origspace);
892 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
893 od->dq_originodes);
894 spin_unlock(&dq_data_lock);
895 trace_olq_set_dquot(
896 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
897 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
898 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
899 }
900
901 /* Write dquot to local quota file */
902 int ocfs2_local_write_dquot(struct dquot *dquot)
903 {
904 struct super_block *sb = dquot->dq_sb;
905 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
906 struct buffer_head *bh;
907 struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
908 int status;
909
910 status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
911 &bh);
912 if (status) {
913 mlog_errno(status);
914 goto out;
915 }
916 status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
917 if (status < 0) {
918 mlog_errno(status);
919 goto out;
920 }
921 out:
922 brelse(bh);
923 return status;
924 }
925
926 /* Find free entry in local quota file */
927 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
928 int type,
929 int *offset)
930 {
931 struct mem_dqinfo *info = sb_dqinfo(sb, type);
932 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
933 struct ocfs2_quota_chunk *chunk;
934 struct ocfs2_local_disk_chunk *dchunk;
935 int found = 0, len;
936
937 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
938 dchunk = (struct ocfs2_local_disk_chunk *)
939 chunk->qc_headerbh->b_data;
940 if (le32_to_cpu(dchunk->dqc_free) > 0) {
941 found = 1;
942 break;
943 }
944 }
945 if (!found)
946 return NULL;
947
948 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
949 len = ol_chunk_entries(sb);
950 } else {
951 len = (oinfo->dqi_blocks -
952 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
953 * ol_quota_entries_per_block(sb);
954 }
955
956 found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
957 /* We failed? */
958 if (found == len) {
959 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
960 " entries free (type=%d)\n", chunk->qc_num,
961 le32_to_cpu(dchunk->dqc_free), type);
962 return ERR_PTR(-EIO);
963 }
964 *offset = found;
965 return chunk;
966 }
967
968 /* Add new chunk to the local quota file */
969 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
970 struct super_block *sb,
971 int type,
972 int *offset)
973 {
974 struct mem_dqinfo *info = sb_dqinfo(sb, type);
975 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
976 struct inode *lqinode = sb_dqopt(sb)->files[type];
977 struct ocfs2_quota_chunk *chunk = NULL;
978 struct ocfs2_local_disk_chunk *dchunk;
979 int status;
980 handle_t *handle;
981 struct buffer_head *bh = NULL, *dbh = NULL;
982 u64 p_blkno;
983
984 /* We are protected by dqio_sem so no locking needed */
985 status = ocfs2_extend_no_holes(lqinode, NULL,
986 i_size_read(lqinode) + 2 * sb->s_blocksize,
987 i_size_read(lqinode));
988 if (status < 0) {
989 mlog_errno(status);
990 goto out;
991 }
992 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
993 i_size_read(lqinode) + 2 * sb->s_blocksize);
994 if (status < 0) {
995 mlog_errno(status);
996 goto out;
997 }
998
999 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
1000 if (!chunk) {
1001 status = -ENOMEM;
1002 mlog_errno(status);
1003 goto out;
1004 }
1005 /* Local quota info and two new blocks we initialize */
1006 handle = ocfs2_start_trans(OCFS2_SB(sb),
1007 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1008 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1009 if (IS_ERR(handle)) {
1010 status = PTR_ERR(handle);
1011 mlog_errno(status);
1012 goto out;
1013 }
1014
1015 /* Initialize chunk header */
1016 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1017 &p_blkno, NULL, NULL);
1018 if (status < 0) {
1019 mlog_errno(status);
1020 goto out_trans;
1021 }
1022 bh = sb_getblk(sb, p_blkno);
1023 if (!bh) {
1024 status = -ENOMEM;
1025 mlog_errno(status);
1026 goto out_trans;
1027 }
1028 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1029 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1030 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1031 OCFS2_JOURNAL_ACCESS_CREATE);
1032 if (status < 0) {
1033 mlog_errno(status);
1034 goto out_trans;
1035 }
1036 lock_buffer(bh);
1037 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1038 memset(dchunk->dqc_bitmap, 0,
1039 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1040 OCFS2_QBLK_RESERVED_SPACE);
1041 unlock_buffer(bh);
1042 ocfs2_journal_dirty(handle, bh);
1043
1044 /* Initialize new block with structures */
1045 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1046 &p_blkno, NULL, NULL);
1047 if (status < 0) {
1048 mlog_errno(status);
1049 goto out_trans;
1050 }
1051 dbh = sb_getblk(sb, p_blkno);
1052 if (!dbh) {
1053 status = -ENOMEM;
1054 mlog_errno(status);
1055 goto out_trans;
1056 }
1057 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1058 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1059 OCFS2_JOURNAL_ACCESS_CREATE);
1060 if (status < 0) {
1061 mlog_errno(status);
1062 goto out_trans;
1063 }
1064 lock_buffer(dbh);
1065 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1066 unlock_buffer(dbh);
1067 ocfs2_journal_dirty(handle, dbh);
1068
1069 /* Update local quotafile info */
1070 oinfo->dqi_blocks += 2;
1071 oinfo->dqi_chunks++;
1072 status = ocfs2_local_write_info(sb, type);
1073 if (status < 0) {
1074 mlog_errno(status);
1075 goto out_trans;
1076 }
1077 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1078 if (status < 0) {
1079 mlog_errno(status);
1080 goto out;
1081 }
1082
1083 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1084 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1085 struct ocfs2_quota_chunk,
1086 qc_chunk)->qc_num + 1;
1087 chunk->qc_headerbh = bh;
1088 *offset = 0;
1089 return chunk;
1090 out_trans:
1091 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1092 out:
1093 brelse(bh);
1094 brelse(dbh);
1095 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1096 return ERR_PTR(status);
1097 }
1098
1099 /* Find free entry in local quota file */
1100 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1101 struct super_block *sb,
1102 int type,
1103 int *offset)
1104 {
1105 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1106 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1107 struct ocfs2_quota_chunk *chunk;
1108 struct inode *lqinode = sb_dqopt(sb)->files[type];
1109 struct ocfs2_local_disk_chunk *dchunk;
1110 int epb = ol_quota_entries_per_block(sb);
1111 unsigned int chunk_blocks;
1112 struct buffer_head *bh;
1113 u64 p_blkno;
1114 int status;
1115 handle_t *handle;
1116
1117 if (list_empty(&oinfo->dqi_chunk))
1118 return ocfs2_local_quota_add_chunk(sb, type, offset);
1119 /* Is the last chunk full? */
1120 chunk = list_entry(oinfo->dqi_chunk.prev,
1121 struct ocfs2_quota_chunk, qc_chunk);
1122 chunk_blocks = oinfo->dqi_blocks -
1123 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1124 if (ol_chunk_blocks(sb) == chunk_blocks)
1125 return ocfs2_local_quota_add_chunk(sb, type, offset);
1126
1127 /* We are protected by dqio_sem so no locking needed */
1128 status = ocfs2_extend_no_holes(lqinode, NULL,
1129 i_size_read(lqinode) + sb->s_blocksize,
1130 i_size_read(lqinode));
1131 if (status < 0) {
1132 mlog_errno(status);
1133 goto out;
1134 }
1135 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1136 i_size_read(lqinode) + sb->s_blocksize);
1137 if (status < 0) {
1138 mlog_errno(status);
1139 goto out;
1140 }
1141
1142 /* Get buffer from the just added block */
1143 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1144 &p_blkno, NULL, NULL);
1145 if (status < 0) {
1146 mlog_errno(status);
1147 goto out;
1148 }
1149 bh = sb_getblk(sb, p_blkno);
1150 if (!bh) {
1151 status = -ENOMEM;
1152 mlog_errno(status);
1153 goto out;
1154 }
1155 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1156
1157 /* Local quota info, chunk header and the new block we initialize */
1158 handle = ocfs2_start_trans(OCFS2_SB(sb),
1159 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1160 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1161 if (IS_ERR(handle)) {
1162 status = PTR_ERR(handle);
1163 mlog_errno(status);
1164 goto out;
1165 }
1166 /* Zero created block */
1167 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1168 OCFS2_JOURNAL_ACCESS_CREATE);
1169 if (status < 0) {
1170 mlog_errno(status);
1171 goto out_trans;
1172 }
1173 lock_buffer(bh);
1174 memset(bh->b_data, 0, sb->s_blocksize);
1175 unlock_buffer(bh);
1176 ocfs2_journal_dirty(handle, bh);
1177
1178 /* Update chunk header */
1179 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1180 chunk->qc_headerbh,
1181 OCFS2_JOURNAL_ACCESS_WRITE);
1182 if (status < 0) {
1183 mlog_errno(status);
1184 goto out_trans;
1185 }
1186
1187 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1188 lock_buffer(chunk->qc_headerbh);
1189 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1190 unlock_buffer(chunk->qc_headerbh);
1191 ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1192
1193 /* Update file header */
1194 oinfo->dqi_blocks++;
1195 status = ocfs2_local_write_info(sb, type);
1196 if (status < 0) {
1197 mlog_errno(status);
1198 goto out_trans;
1199 }
1200
1201 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1202 if (status < 0) {
1203 mlog_errno(status);
1204 goto out;
1205 }
1206 *offset = chunk_blocks * epb;
1207 return chunk;
1208 out_trans:
1209 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1210 out:
1211 return ERR_PTR(status);
1212 }
1213
1214 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1215 {
1216 int *offset = private;
1217 struct ocfs2_local_disk_chunk *dchunk;
1218
1219 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1220 ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1221 le32_add_cpu(&dchunk->dqc_free, -1);
1222 }
1223
1224 /* Create dquot in the local file for given id */
1225 int ocfs2_create_local_dquot(struct dquot *dquot)
1226 {
1227 struct super_block *sb = dquot->dq_sb;
1228 int type = dquot->dq_id.type;
1229 struct inode *lqinode = sb_dqopt(sb)->files[type];
1230 struct ocfs2_quota_chunk *chunk;
1231 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1232 int offset;
1233 int status;
1234 u64 pcount;
1235
1236 down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1237 chunk = ocfs2_find_free_entry(sb, type, &offset);
1238 if (!chunk) {
1239 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1240 if (IS_ERR(chunk)) {
1241 status = PTR_ERR(chunk);
1242 goto out;
1243 }
1244 } else if (IS_ERR(chunk)) {
1245 status = PTR_ERR(chunk);
1246 goto out;
1247 }
1248 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1249 od->dq_chunk = chunk;
1250 status = ocfs2_extent_map_get_blocks(lqinode,
1251 ol_dqblk_block(sb, chunk->qc_num, offset),
1252 &od->dq_local_phys_blk,
1253 &pcount,
1254 NULL);
1255
1256 /* Initialize dquot structure on disk */
1257 status = ocfs2_local_write_dquot(dquot);
1258 if (status < 0) {
1259 mlog_errno(status);
1260 goto out;
1261 }
1262
1263 /* Mark structure as allocated */
1264 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1265 &offset);
1266 if (status < 0) {
1267 mlog_errno(status);
1268 goto out;
1269 }
1270 out:
1271 up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1272 return status;
1273 }
1274
1275 /*
1276 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1277 * already started a transaction and written all changes to global quota file
1278 */
1279 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1280 {
1281 int status;
1282 int type = dquot->dq_id.type;
1283 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1284 struct super_block *sb = dquot->dq_sb;
1285 struct ocfs2_local_disk_chunk *dchunk;
1286 int offset;
1287
1288 status = ocfs2_journal_access_dq(handle,
1289 INODE_CACHE(sb_dqopt(sb)->files[type]),
1290 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1291 if (status < 0) {
1292 mlog_errno(status);
1293 goto out;
1294 }
1295 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1296 od->dq_local_off);
1297 dchunk = (struct ocfs2_local_disk_chunk *)
1298 (od->dq_chunk->qc_headerbh->b_data);
1299 /* Mark structure as freed */
1300 lock_buffer(od->dq_chunk->qc_headerbh);
1301 ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1302 le32_add_cpu(&dchunk->dqc_free, 1);
1303 unlock_buffer(od->dq_chunk->qc_headerbh);
1304 ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1305
1306 out:
1307 return status;
1308 }
1309
1310 static const struct quota_format_ops ocfs2_format_ops = {
1311 .check_quota_file = ocfs2_local_check_quota_file,
1312 .read_file_info = ocfs2_local_read_info,
1313 .write_file_info = ocfs2_global_write_info,
1314 .free_file_info = ocfs2_local_free_info,
1315 };
1316
1317 struct quota_format_type ocfs2_quota_format = {
1318 .qf_fmt_id = QFMT_OCFS2,
1319 .qf_ops = &ocfs2_format_ops,
1320 .qf_owner = THIS_MODULE
1321 };
Linux with added FPC-III support