2 * Implementation of operations over local quota file
6 #include <linux/quota.h>
7 #include <linux/quotaops.h>
8 #include <linux/module.h>
10 #define MLOG_MASK_PREFIX ML_QUOTA
11 #include <cluster/masklog.h>
18 #include "buffer_head_io.h"
24 /* Number of local quota structures per block */
25 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
27 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
28 sizeof(struct ocfs2_local_disk_dqblk));
31 /* Number of blocks with entries in one chunk */
32 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
34 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
35 OCFS2_QBLK_RESERVED_SPACE) << 3) /
36 ol_quota_entries_per_block(sb);
39 /* Number of entries in a chunk bitmap */
40 static unsigned int ol_chunk_entries(struct super_block *sb)
42 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
45 /* Offset of the chunk in quota file */
46 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
48 /* 1 block for local quota file info, 1 block per chunk for chunk info */
49 return 1 + (ol_chunk_blocks(sb) + 1) * c;
52 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
54 int epb = ol_quota_entries_per_block(sb);
56 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
59 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
61 int epb = ol_quota_entries_per_block(sb);
63 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
66 /* Offset of the dquot structure in the quota file */
67 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
69 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
70 ol_dqblk_block_off(sb, c, off);
73 /* Compute block number from given offset */
74 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
76 return off >> sb->s_blocksize_bits;
79 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
81 return off & ((1 << sb->s_blocksize_bits) - 1);
84 /* Compute offset in the chunk of a structure with the given offset */
85 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
87 int epb = ol_quota_entries_per_block(sb);
89 return ((off >> sb->s_blocksize_bits) -
90 ol_quota_chunk_block(sb, c) - 1) * epb
91 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
92 sizeof(struct ocfs2_local_disk_dqblk);
95 /* Write bufferhead into the fs */
96 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
97 void (*modify)(struct buffer_head *, void *), void *private)
99 struct super_block *sb = inode->i_sb;
103 handle = ocfs2_start_trans(OCFS2_SB(sb), 1);
104 if (IS_ERR(handle)) {
105 status = PTR_ERR(handle);
109 status = ocfs2_journal_access_dq(handle, inode, bh,
110 OCFS2_JOURNAL_ACCESS_WRITE);
113 ocfs2_commit_trans(OCFS2_SB(sb), handle);
119 status = ocfs2_journal_dirty(handle, bh);
122 ocfs2_commit_trans(OCFS2_SB(sb), handle);
125 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
133 /* Check whether we understand format of quota files */
134 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
136 unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
137 unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
138 unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
139 unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
140 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
141 GROUP_QUOTA_SYSTEM_INODE };
142 struct buffer_head *bh = NULL;
143 struct inode *linode = sb_dqopt(sb)->files[type];
144 struct inode *ginode = NULL;
145 struct ocfs2_disk_dqheader *dqhead;
148 /* First check whether we understand local quota file */
149 status = ocfs2_read_quota_block(linode, 0, &bh);
152 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
156 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
157 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
158 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
159 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
160 lmagics[type], type);
163 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
164 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
165 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
166 lversions[type], type);
172 /* Next check whether we understand global quota file */
173 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
176 mlog(ML_ERROR, "cannot get global quota file inode "
177 "(type=%d)\n", type);
180 /* Since the header is read only, we don't care about locking */
181 status = ocfs2_read_quota_block(ginode, 0, &bh);
184 mlog(ML_ERROR, "failed to read global quota file header "
185 "(type=%d)\n", type);
188 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
189 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
190 mlog(ML_ERROR, "global quota file magic does not match "
191 "(%u != %u), type=%d\n",
192 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
195 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
196 mlog(ML_ERROR, "global quota file version does not match "
197 "(%u != %u), type=%d\n",
198 le32_to_cpu(dqhead->dqh_version), gversions[type],
210 /* Release given list of quota file chunks */
211 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
213 struct ocfs2_quota_chunk *pos, *next;
215 list_for_each_entry_safe(pos, next, head, qc_chunk) {
216 list_del(&pos->qc_chunk);
217 brelse(pos->qc_headerbh);
218 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
222 /* Load quota bitmaps into memory */
223 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
224 struct ocfs2_local_disk_dqinfo *ldinfo,
225 struct list_head *head)
227 struct ocfs2_quota_chunk *newchunk;
230 INIT_LIST_HEAD(head);
231 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
232 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
234 ocfs2_release_local_quota_bitmaps(head);
237 newchunk->qc_num = i;
238 newchunk->qc_headerbh = NULL;
239 status = ocfs2_read_quota_block(inode,
240 ol_quota_chunk_block(inode->i_sb, i),
241 &newchunk->qc_headerbh);
244 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
245 ocfs2_release_local_quota_bitmaps(head);
248 list_add_tail(&newchunk->qc_chunk, head);
253 static void olq_update_info(struct buffer_head *bh, void *private)
255 struct mem_dqinfo *info = private;
256 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
257 struct ocfs2_local_disk_dqinfo *ldinfo;
259 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
260 OCFS2_LOCAL_INFO_OFF);
261 spin_lock(&dq_data_lock);
262 ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
263 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
264 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
265 spin_unlock(&dq_data_lock);
268 static int ocfs2_add_recovery_chunk(struct super_block *sb,
269 struct ocfs2_local_disk_chunk *dchunk,
271 struct list_head *head)
273 struct ocfs2_recovery_chunk *rc;
275 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
278 rc->rc_chunk = chunk;
279 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
280 if (!rc->rc_bitmap) {
284 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
285 (ol_chunk_entries(sb) + 7) >> 3);
286 list_add_tail(&rc->rc_list, head);
290 static void free_recovery_list(struct list_head *head)
292 struct ocfs2_recovery_chunk *next;
293 struct ocfs2_recovery_chunk *rchunk;
295 list_for_each_entry_safe(rchunk, next, head, rc_list) {
296 list_del(&rchunk->rc_list);
297 kfree(rchunk->rc_bitmap);
302 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
306 for (type = 0; type < MAXQUOTAS; type++)
307 free_recovery_list(&(rec->r_list[type]));
311 /* Load entries in our quota file we have to recover*/
312 static int ocfs2_recovery_load_quota(struct inode *lqinode,
313 struct ocfs2_local_disk_dqinfo *ldinfo,
315 struct list_head *head)
317 struct super_block *sb = lqinode->i_sb;
318 struct buffer_head *hbh;
319 struct ocfs2_local_disk_chunk *dchunk;
320 int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
323 for (i = 0; i < chunks; i++) {
325 status = ocfs2_read_quota_block(lqinode,
326 ol_quota_chunk_block(sb, i),
332 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
333 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
334 status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
340 free_recovery_list(head);
344 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
347 struct ocfs2_quota_recovery *rec;
349 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
352 for (type = 0; type < MAXQUOTAS; type++)
353 INIT_LIST_HEAD(&(rec->r_list[type]));
357 /* Load information we need for quota recovery into memory */
358 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
359 struct ocfs2_super *osb,
362 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
363 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
364 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
365 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
366 struct super_block *sb = osb->sb;
367 struct ocfs2_local_disk_dqinfo *ldinfo;
368 struct inode *lqinode;
369 struct buffer_head *bh;
372 struct ocfs2_quota_recovery *rec;
374 mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
375 rec = ocfs2_alloc_quota_recovery();
377 return ERR_PTR(-ENOMEM);
380 for (type = 0; type < MAXQUOTAS; type++) {
381 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
383 /* At this point, journal of the slot is already replayed so
384 * we can trust metadata and data of the quota file */
385 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
390 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
391 OCFS2_META_LOCK_RECOVERY);
396 /* Now read local header */
398 status = ocfs2_read_quota_block(lqinode, 0, &bh);
401 mlog(ML_ERROR, "failed to read quota file info header "
402 "(slot=%d type=%d)\n", slot_num, type);
405 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
406 OCFS2_LOCAL_INFO_OFF);
407 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
411 ocfs2_inode_unlock(lqinode, 1);
419 ocfs2_free_quota_recovery(rec);
420 rec = ERR_PTR(status);
425 /* Sync changes in local quota file into global quota file and
426 * reinitialize local quota file.
427 * The function expects local quota file to be already locked and
428 * dqonoff_mutex locked. */
429 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
431 struct ocfs2_quota_recovery *rec)
433 struct super_block *sb = lqinode->i_sb;
434 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
435 struct ocfs2_local_disk_chunk *dchunk;
436 struct ocfs2_local_disk_dqblk *dqblk;
439 struct buffer_head *hbh = NULL, *qbh = NULL;
442 struct ocfs2_recovery_chunk *rchunk, *next;
443 qsize_t spacechange, inodechange;
445 mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
447 status = ocfs2_lock_global_qf(oinfo, 1);
451 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
452 chunk = rchunk->rc_chunk;
454 status = ocfs2_read_quota_block(lqinode,
455 ol_quota_chunk_block(sb, chunk),
461 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
462 for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
464 status = ocfs2_read_quota_block(lqinode,
465 ol_dqblk_block(sb, chunk, bit),
471 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
472 ol_dqblk_block_off(sb, chunk, bit));
473 dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
476 mlog(ML_ERROR, "Failed to get quota structure "
477 "for id %u, type %d. Cannot finish quota "
479 (unsigned)le64_to_cpu(dqblk->dqb_id),
483 handle = ocfs2_start_trans(OCFS2_SB(sb),
484 OCFS2_QSYNC_CREDITS);
485 if (IS_ERR(handle)) {
486 status = PTR_ERR(handle);
490 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
491 spin_lock(&dq_data_lock);
492 /* Add usage from quota entry into quota changes
493 * of our node. Auxiliary variables are important
494 * due to signedness */
495 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
496 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
497 dquot->dq_dqb.dqb_curspace += spacechange;
498 dquot->dq_dqb.dqb_curinodes += inodechange;
499 spin_unlock(&dq_data_lock);
500 /* We want to drop reference held by the crashed
501 * node. Since we have our own reference we know
502 * global structure actually won't be freed. */
503 status = ocfs2_global_release_dquot(dquot);
508 /* Release local quota file entry */
509 status = ocfs2_journal_access_dq(handle, lqinode,
510 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
516 WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
517 ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
518 le32_add_cpu(&dchunk->dqc_free, 1);
520 status = ocfs2_journal_dirty(handle, qbh);
524 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
525 ocfs2_commit_trans(OCFS2_SB(sb), handle);
534 list_del(&rchunk->rc_list);
535 kfree(rchunk->rc_bitmap);
540 ocfs2_unlock_global_qf(oinfo, 1);
543 free_recovery_list(&(rec->r_list[type]));
548 /* Recover local quota files for given node different from us */
549 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
550 struct ocfs2_quota_recovery *rec,
553 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
554 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
555 struct super_block *sb = osb->sb;
556 struct ocfs2_local_disk_dqinfo *ldinfo;
557 struct buffer_head *bh;
561 struct inode *lqinode;
564 mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
565 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
566 for (type = 0; type < MAXQUOTAS; type++) {
567 if (list_empty(&(rec->r_list[type])))
569 mlog(0, "Recovering quota in slot %d\n", slot_num);
570 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
575 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
576 OCFS2_META_LOCK_NOQUEUE);
577 /* Someone else is holding the lock? Then he must be
578 * doing the recovery. Just skip the file... */
579 if (status == -EAGAIN) {
580 mlog(ML_NOTICE, "skipping quota recovery for slot %d "
581 "because quota file is locked.\n", slot_num);
584 } else if (status < 0) {
588 /* Now read local header */
590 status = ocfs2_read_quota_block(lqinode, 0, &bh);
593 mlog(ML_ERROR, "failed to read quota file info header "
594 "(slot=%d type=%d)\n", slot_num, type);
597 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
598 OCFS2_LOCAL_INFO_OFF);
599 /* Is recovery still needed? */
600 flags = le32_to_cpu(ldinfo->dqi_flags);
601 if (!(flags & OLQF_CLEAN))
602 status = ocfs2_recover_local_quota_file(lqinode,
605 /* We don't want to mark file as clean when it is actually
607 if (slot_num == osb->slot_num)
609 /* Mark quota file as clean if we are recovering quota file of
610 * some other node. */
611 handle = ocfs2_start_trans(osb, 1);
612 if (IS_ERR(handle)) {
613 status = PTR_ERR(handle);
617 status = ocfs2_journal_access_dq(handle, lqinode, bh,
618 OCFS2_JOURNAL_ACCESS_WRITE);
624 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
626 status = ocfs2_journal_dirty(handle, bh);
630 ocfs2_commit_trans(osb, handle);
634 ocfs2_inode_unlock(lqinode, 1);
641 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
646 /* Read information header from quota file */
647 static int ocfs2_local_read_info(struct super_block *sb, int type)
649 struct ocfs2_local_disk_dqinfo *ldinfo;
650 struct mem_dqinfo *info = sb_dqinfo(sb, type);
651 struct ocfs2_mem_dqinfo *oinfo;
652 struct inode *lqinode = sb_dqopt(sb)->files[type];
654 struct buffer_head *bh = NULL;
655 struct ocfs2_quota_recovery *rec;
658 /* We don't need the lock and we have to acquire quota file locks
659 * which will later depend on this lock */
660 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
661 info->dqi_maxblimit = 0x7fffffffffffffffLL;
662 info->dqi_maxilimit = 0x7fffffffffffffffLL;
663 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
665 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
669 info->dqi_priv = oinfo;
670 oinfo->dqi_type = type;
671 INIT_LIST_HEAD(&oinfo->dqi_chunk);
672 oinfo->dqi_rec = NULL;
673 oinfo->dqi_lqi_bh = NULL;
674 oinfo->dqi_ibh = NULL;
676 status = ocfs2_global_read_info(sb, type);
680 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
687 /* Now read local header */
688 status = ocfs2_read_quota_block(lqinode, 0, &bh);
691 mlog(ML_ERROR, "failed to read quota file info header "
692 "(type=%d)\n", type);
695 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
696 OCFS2_LOCAL_INFO_OFF);
697 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
698 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
699 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
702 /* We crashed when using local quota file? */
703 if (!(info->dqi_flags & OLQF_CLEAN)) {
704 rec = OCFS2_SB(sb)->quota_rec;
706 rec = ocfs2_alloc_quota_recovery();
712 OCFS2_SB(sb)->quota_rec = rec;
715 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
723 status = ocfs2_load_local_quota_bitmaps(lqinode,
731 /* Now mark quota file as used */
732 info->dqi_flags &= ~OLQF_CLEAN;
733 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
739 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
743 iput(oinfo->dqi_gqinode);
744 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
745 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
746 brelse(oinfo->dqi_lqi_bh);
748 ocfs2_inode_unlock(lqinode, 1);
749 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
753 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
757 /* Write local info to quota file */
758 static int ocfs2_local_write_info(struct super_block *sb, int type)
760 struct mem_dqinfo *info = sb_dqinfo(sb, type);
761 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
765 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
775 /* Release info from memory */
776 static int ocfs2_local_free_info(struct super_block *sb, int type)
778 struct mem_dqinfo *info = sb_dqinfo(sb, type);
779 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
780 struct ocfs2_quota_chunk *chunk;
781 struct ocfs2_local_disk_chunk *dchunk;
782 int mark_clean = 1, len;
785 /* At this point we know there are no more dquots and thus
786 * even if there's some sync in the pdflush queue, it won't
787 * find any dquots and return without doing anything */
788 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
789 iput(oinfo->dqi_gqinode);
790 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
791 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
792 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
793 dchunk = (struct ocfs2_local_disk_chunk *)
794 (chunk->qc_headerbh->b_data);
795 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
796 len = ol_chunk_entries(sb);
798 len = (oinfo->dqi_blocks -
799 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
800 * ol_quota_entries_per_block(sb);
802 /* Not all entries free? Bug! */
803 if (le32_to_cpu(dchunk->dqc_free) != len) {
804 mlog(ML_ERROR, "releasing quota file with used "
805 "entries (type=%d)\n", type);
809 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
811 /* dqonoff_mutex protects us against racing with recovery thread... */
812 if (oinfo->dqi_rec) {
813 ocfs2_free_quota_recovery(oinfo->dqi_rec);
820 /* Mark local file as clean */
821 info->dqi_flags |= OLQF_CLEAN;
822 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
832 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
833 brelse(oinfo->dqi_ibh);
834 brelse(oinfo->dqi_lqi_bh);
839 static void olq_set_dquot(struct buffer_head *bh, void *private)
841 struct ocfs2_dquot *od = private;
842 struct ocfs2_local_disk_dqblk *dqblk;
843 struct super_block *sb = od->dq_dquot.dq_sb;
845 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
846 + ol_dqblk_block_offset(sb, od->dq_local_off));
848 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
849 spin_lock(&dq_data_lock);
850 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
852 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
854 spin_unlock(&dq_data_lock);
855 mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
856 od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
857 (long long)le64_to_cpu(dqblk->dqb_inodemod));
860 /* Write dquot to local quota file */
861 static int ocfs2_local_write_dquot(struct dquot *dquot)
863 struct super_block *sb = dquot->dq_sb;
864 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
865 struct buffer_head *bh = NULL;
868 status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
869 ol_dqblk_file_block(sb, od->dq_local_off),
875 status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
886 /* Find free entry in local quota file */
887 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
891 struct mem_dqinfo *info = sb_dqinfo(sb, type);
892 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
893 struct ocfs2_quota_chunk *chunk;
894 struct ocfs2_local_disk_chunk *dchunk;
897 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
898 dchunk = (struct ocfs2_local_disk_chunk *)
899 chunk->qc_headerbh->b_data;
900 if (le32_to_cpu(dchunk->dqc_free) > 0) {
908 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
909 len = ol_chunk_entries(sb);
911 len = (oinfo->dqi_blocks -
912 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
913 * ol_quota_entries_per_block(sb);
916 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
919 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
920 " entries free (type=%d)\n", chunk->qc_num,
921 le32_to_cpu(dchunk->dqc_free), type);
922 return ERR_PTR(-EIO);
928 /* Add new chunk to the local quota file */
929 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
930 struct super_block *sb,
934 struct mem_dqinfo *info = sb_dqinfo(sb, type);
935 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
936 struct inode *lqinode = sb_dqopt(sb)->files[type];
937 struct ocfs2_quota_chunk *chunk = NULL;
938 struct ocfs2_local_disk_chunk *dchunk;
941 struct buffer_head *bh = NULL;
944 /* We are protected by dqio_sem so no locking needed */
945 status = ocfs2_extend_no_holes(lqinode,
946 lqinode->i_size + 2 * sb->s_blocksize,
952 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
953 lqinode->i_size + 2 * sb->s_blocksize);
959 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
966 down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
967 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
968 &p_blkno, NULL, NULL);
969 up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
974 bh = sb_getblk(sb, p_blkno);
980 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
982 handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
983 if (IS_ERR(handle)) {
984 status = PTR_ERR(handle);
989 status = ocfs2_journal_access_dq(handle, lqinode, bh,
990 OCFS2_JOURNAL_ACCESS_WRITE);
996 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
997 memset(dchunk->dqc_bitmap, 0,
998 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
999 OCFS2_QBLK_RESERVED_SPACE);
1000 set_buffer_uptodate(bh);
1002 status = ocfs2_journal_dirty(handle, bh);
1008 oinfo->dqi_blocks += 2;
1009 oinfo->dqi_chunks++;
1010 status = ocfs2_local_write_info(sb, type);
1015 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1021 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1022 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1023 struct ocfs2_quota_chunk,
1024 qc_chunk)->qc_num + 1;
1025 chunk->qc_headerbh = bh;
1029 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1032 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1033 return ERR_PTR(status);
1036 /* Find free entry in local quota file */
1037 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1038 struct super_block *sb,
1042 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1043 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1044 struct ocfs2_quota_chunk *chunk;
1045 struct inode *lqinode = sb_dqopt(sb)->files[type];
1046 struct ocfs2_local_disk_chunk *dchunk;
1047 int epb = ol_quota_entries_per_block(sb);
1048 unsigned int chunk_blocks;
1052 if (list_empty(&oinfo->dqi_chunk))
1053 return ocfs2_local_quota_add_chunk(sb, type, offset);
1054 /* Is the last chunk full? */
1055 chunk = list_entry(oinfo->dqi_chunk.prev,
1056 struct ocfs2_quota_chunk, qc_chunk);
1057 chunk_blocks = oinfo->dqi_blocks -
1058 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1059 if (ol_chunk_blocks(sb) == chunk_blocks)
1060 return ocfs2_local_quota_add_chunk(sb, type, offset);
1062 /* We are protected by dqio_sem so no locking needed */
1063 status = ocfs2_extend_no_holes(lqinode,
1064 lqinode->i_size + sb->s_blocksize,
1070 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1071 lqinode->i_size + sb->s_blocksize);
1076 handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
1077 if (IS_ERR(handle)) {
1078 status = PTR_ERR(handle);
1082 status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh,
1083 OCFS2_JOURNAL_ACCESS_WRITE);
1089 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1090 lock_buffer(chunk->qc_headerbh);
1091 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1092 unlock_buffer(chunk->qc_headerbh);
1093 status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1098 oinfo->dqi_blocks++;
1099 status = ocfs2_local_write_info(sb, type);
1105 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1110 *offset = chunk_blocks * epb;
1113 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1115 return ERR_PTR(status);
1118 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1120 int *offset = private;
1121 struct ocfs2_local_disk_chunk *dchunk;
1123 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1124 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1125 le32_add_cpu(&dchunk->dqc_free, -1);
1128 /* Create dquot in the local file for given id */
1129 static int ocfs2_create_local_dquot(struct dquot *dquot)
1131 struct super_block *sb = dquot->dq_sb;
1132 int type = dquot->dq_type;
1133 struct inode *lqinode = sb_dqopt(sb)->files[type];
1134 struct ocfs2_quota_chunk *chunk;
1135 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1139 chunk = ocfs2_find_free_entry(sb, type, &offset);
1141 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1143 return PTR_ERR(chunk);
1144 } else if (IS_ERR(chunk)) {
1145 return PTR_ERR(chunk);
1147 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1148 od->dq_chunk = chunk;
1150 /* Initialize dquot structure on disk */
1151 status = ocfs2_local_write_dquot(dquot);
1157 /* Mark structure as allocated */
1158 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1168 /* Create entry in local file for dquot, load data from the global file */
1169 static int ocfs2_local_read_dquot(struct dquot *dquot)
1173 mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
1175 status = ocfs2_global_read_dquot(dquot);
1181 /* Now create entry in the local quota file */
1182 status = ocfs2_create_local_dquot(dquot);
1194 /* Release dquot structure from local quota file. ocfs2_release_dquot() has
1195 * already started a transaction and obtained exclusive lock for global
1197 static int ocfs2_local_release_dquot(struct dquot *dquot)
1200 int type = dquot->dq_type;
1201 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1202 struct super_block *sb = dquot->dq_sb;
1203 struct ocfs2_local_disk_chunk *dchunk;
1205 handle_t *handle = journal_current_handle();
1208 /* First write all local changes to global file */
1209 status = ocfs2_global_release_dquot(dquot);
1215 status = ocfs2_journal_access_dq(handle, sb_dqopt(sb)->files[type],
1216 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1221 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1223 dchunk = (struct ocfs2_local_disk_chunk *)
1224 (od->dq_chunk->qc_headerbh->b_data);
1225 /* Mark structure as freed */
1226 lock_buffer(od->dq_chunk->qc_headerbh);
1227 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1228 le32_add_cpu(&dchunk->dqc_free, 1);
1229 unlock_buffer(od->dq_chunk->qc_headerbh);
1230 status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1237 /* Clear the read bit so that next time someone uses this
1238 * dquot he reads fresh info from disk and allocates local
1239 * dquot structure */
1240 clear_bit(DQ_READ_B, &dquot->dq_flags);
1244 static struct quota_format_ops ocfs2_format_ops = {
1245 .check_quota_file = ocfs2_local_check_quota_file,
1246 .read_file_info = ocfs2_local_read_info,
1247 .write_file_info = ocfs2_global_write_info,
1248 .free_file_info = ocfs2_local_free_info,
1249 .read_dqblk = ocfs2_local_read_dquot,
1250 .commit_dqblk = ocfs2_local_write_dquot,
1251 .release_dqblk = ocfs2_local_release_dquot,
1254 struct quota_format_type ocfs2_quota_format = {
1255 .qf_fmt_id = QFMT_OCFS2,
1256 .qf_ops = &ocfs2_format_ops,
1257 .qf_owner = THIS_MODULE