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"
25 /* Number of local quota structures per block */
26 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
28 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
29 sizeof(struct ocfs2_local_disk_dqblk));
32 /* Number of blocks with entries in one chunk */
33 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
35 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
36 OCFS2_QBLK_RESERVED_SPACE) << 3) /
37 ol_quota_entries_per_block(sb);
40 /* Number of entries in a chunk bitmap */
41 static unsigned int ol_chunk_entries(struct super_block *sb)
43 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
46 /* Offset of the chunk in quota file */
47 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
49 /* 1 block for local quota file info, 1 block per chunk for chunk info */
50 return 1 + (ol_chunk_blocks(sb) + 1) * c;
53 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
55 int epb = ol_quota_entries_per_block(sb);
57 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
60 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
62 int epb = ol_quota_entries_per_block(sb);
64 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
67 /* Offset of the dquot structure in the quota file */
68 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
70 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
71 ol_dqblk_block_off(sb, c, off);
74 /* Compute block number from given offset */
75 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
77 return off >> sb->s_blocksize_bits;
80 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
82 return off & ((1 << sb->s_blocksize_bits) - 1);
85 /* Compute offset in the chunk of a structure with the given offset */
86 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
88 int epb = ol_quota_entries_per_block(sb);
90 return ((off >> sb->s_blocksize_bits) -
91 ol_quota_chunk_block(sb, c) - 1) * epb
92 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
93 sizeof(struct ocfs2_local_disk_dqblk);
96 /* Write bufferhead into the fs */
97 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
98 void (*modify)(struct buffer_head *, void *), void *private)
100 struct super_block *sb = inode->i_sb;
104 handle = ocfs2_start_trans(OCFS2_SB(sb),
105 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
106 if (IS_ERR(handle)) {
107 status = PTR_ERR(handle);
111 status = ocfs2_journal_access_dq(handle, inode, bh,
112 OCFS2_JOURNAL_ACCESS_WRITE);
115 ocfs2_commit_trans(OCFS2_SB(sb), handle);
121 status = ocfs2_journal_dirty(handle, bh);
124 ocfs2_commit_trans(OCFS2_SB(sb), handle);
127 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
135 /* Check whether we understand format of quota files */
136 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
138 unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
139 unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
140 unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
141 unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
142 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
143 GROUP_QUOTA_SYSTEM_INODE };
144 struct buffer_head *bh = NULL;
145 struct inode *linode = sb_dqopt(sb)->files[type];
146 struct inode *ginode = NULL;
147 struct ocfs2_disk_dqheader *dqhead;
150 /* First check whether we understand local quota file */
151 status = ocfs2_read_quota_block(linode, 0, &bh);
154 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
158 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
159 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
160 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
161 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
162 lmagics[type], type);
165 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
166 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
167 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
168 lversions[type], type);
174 /* Next check whether we understand global quota file */
175 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
178 mlog(ML_ERROR, "cannot get global quota file inode "
179 "(type=%d)\n", type);
182 /* Since the header is read only, we don't care about locking */
183 status = ocfs2_read_quota_block(ginode, 0, &bh);
186 mlog(ML_ERROR, "failed to read global quota file header "
187 "(type=%d)\n", type);
190 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
191 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
192 mlog(ML_ERROR, "global quota file magic does not match "
193 "(%u != %u), type=%d\n",
194 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
197 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
198 mlog(ML_ERROR, "global quota file version does not match "
199 "(%u != %u), type=%d\n",
200 le32_to_cpu(dqhead->dqh_version), gversions[type],
212 /* Release given list of quota file chunks */
213 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
215 struct ocfs2_quota_chunk *pos, *next;
217 list_for_each_entry_safe(pos, next, head, qc_chunk) {
218 list_del(&pos->qc_chunk);
219 brelse(pos->qc_headerbh);
220 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
224 /* Load quota bitmaps into memory */
225 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
226 struct ocfs2_local_disk_dqinfo *ldinfo,
227 struct list_head *head)
229 struct ocfs2_quota_chunk *newchunk;
232 INIT_LIST_HEAD(head);
233 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
234 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
236 ocfs2_release_local_quota_bitmaps(head);
239 newchunk->qc_num = i;
240 newchunk->qc_headerbh = NULL;
241 status = ocfs2_read_quota_block(inode,
242 ol_quota_chunk_block(inode->i_sb, i),
243 &newchunk->qc_headerbh);
246 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
247 ocfs2_release_local_quota_bitmaps(head);
250 list_add_tail(&newchunk->qc_chunk, head);
255 static void olq_update_info(struct buffer_head *bh, void *private)
257 struct mem_dqinfo *info = private;
258 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
259 struct ocfs2_local_disk_dqinfo *ldinfo;
261 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
262 OCFS2_LOCAL_INFO_OFF);
263 spin_lock(&dq_data_lock);
264 ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
265 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
266 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
267 spin_unlock(&dq_data_lock);
270 static int ocfs2_add_recovery_chunk(struct super_block *sb,
271 struct ocfs2_local_disk_chunk *dchunk,
273 struct list_head *head)
275 struct ocfs2_recovery_chunk *rc;
277 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
280 rc->rc_chunk = chunk;
281 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
282 if (!rc->rc_bitmap) {
286 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
287 (ol_chunk_entries(sb) + 7) >> 3);
288 list_add_tail(&rc->rc_list, head);
292 static void free_recovery_list(struct list_head *head)
294 struct ocfs2_recovery_chunk *next;
295 struct ocfs2_recovery_chunk *rchunk;
297 list_for_each_entry_safe(rchunk, next, head, rc_list) {
298 list_del(&rchunk->rc_list);
299 kfree(rchunk->rc_bitmap);
304 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
308 for (type = 0; type < MAXQUOTAS; type++)
309 free_recovery_list(&(rec->r_list[type]));
313 /* Load entries in our quota file we have to recover*/
314 static int ocfs2_recovery_load_quota(struct inode *lqinode,
315 struct ocfs2_local_disk_dqinfo *ldinfo,
317 struct list_head *head)
319 struct super_block *sb = lqinode->i_sb;
320 struct buffer_head *hbh;
321 struct ocfs2_local_disk_chunk *dchunk;
322 int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
325 for (i = 0; i < chunks; i++) {
327 status = ocfs2_read_quota_block(lqinode,
328 ol_quota_chunk_block(sb, i),
334 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
335 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
336 status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
342 free_recovery_list(head);
346 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
349 struct ocfs2_quota_recovery *rec;
351 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
354 for (type = 0; type < MAXQUOTAS; type++)
355 INIT_LIST_HEAD(&(rec->r_list[type]));
359 /* Load information we need for quota recovery into memory */
360 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
361 struct ocfs2_super *osb,
364 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
365 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
366 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
367 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
368 struct super_block *sb = osb->sb;
369 struct ocfs2_local_disk_dqinfo *ldinfo;
370 struct inode *lqinode;
371 struct buffer_head *bh;
374 struct ocfs2_quota_recovery *rec;
376 mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
377 rec = ocfs2_alloc_quota_recovery();
379 return ERR_PTR(-ENOMEM);
382 for (type = 0; type < MAXQUOTAS; type++) {
383 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
385 /* At this point, journal of the slot is already replayed so
386 * we can trust metadata and data of the quota file */
387 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
392 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
393 OCFS2_META_LOCK_RECOVERY);
398 /* Now read local header */
400 status = ocfs2_read_quota_block(lqinode, 0, &bh);
403 mlog(ML_ERROR, "failed to read quota file info header "
404 "(slot=%d type=%d)\n", slot_num, type);
407 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
408 OCFS2_LOCAL_INFO_OFF);
409 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
413 ocfs2_inode_unlock(lqinode, 1);
421 ocfs2_free_quota_recovery(rec);
422 rec = ERR_PTR(status);
427 /* Sync changes in local quota file into global quota file and
428 * reinitialize local quota file.
429 * The function expects local quota file to be already locked and
430 * dqonoff_mutex locked. */
431 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
433 struct ocfs2_quota_recovery *rec)
435 struct super_block *sb = lqinode->i_sb;
436 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
437 struct ocfs2_local_disk_chunk *dchunk;
438 struct ocfs2_local_disk_dqblk *dqblk;
441 struct buffer_head *hbh = NULL, *qbh = NULL;
444 struct ocfs2_recovery_chunk *rchunk, *next;
445 qsize_t spacechange, inodechange;
447 mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
449 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
450 chunk = rchunk->rc_chunk;
452 status = ocfs2_read_quota_block(lqinode,
453 ol_quota_chunk_block(sb, chunk),
459 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
460 for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
462 status = ocfs2_read_quota_block(lqinode,
463 ol_dqblk_block(sb, chunk, bit),
469 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
470 ol_dqblk_block_off(sb, chunk, bit));
471 dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
474 mlog(ML_ERROR, "Failed to get quota structure "
475 "for id %u, type %d. Cannot finish quota "
477 (unsigned)le64_to_cpu(dqblk->dqb_id),
481 status = ocfs2_lock_global_qf(oinfo, 1);
487 handle = ocfs2_start_trans(OCFS2_SB(sb),
488 OCFS2_QSYNC_CREDITS);
489 if (IS_ERR(handle)) {
490 status = PTR_ERR(handle);
494 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
495 spin_lock(&dq_data_lock);
496 /* Add usage from quota entry into quota changes
497 * of our node. Auxiliary variables are important
498 * due to signedness */
499 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
500 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
501 dquot->dq_dqb.dqb_curspace += spacechange;
502 dquot->dq_dqb.dqb_curinodes += inodechange;
503 spin_unlock(&dq_data_lock);
504 /* We want to drop reference held by the crashed
505 * node. Since we have our own reference we know
506 * global structure actually won't be freed. */
507 status = ocfs2_global_release_dquot(dquot);
512 /* Release local quota file entry */
513 status = ocfs2_journal_access_dq(handle, lqinode,
514 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
520 WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
521 ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
522 le32_add_cpu(&dchunk->dqc_free, 1);
524 status = ocfs2_journal_dirty(handle, qbh);
528 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
529 ocfs2_commit_trans(OCFS2_SB(sb), handle);
531 ocfs2_unlock_global_qf(oinfo, 1);
540 list_del(&rchunk->rc_list);
541 kfree(rchunk->rc_bitmap);
547 free_recovery_list(&(rec->r_list[type]));
552 /* Recover local quota files for given node different from us */
553 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
554 struct ocfs2_quota_recovery *rec,
557 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
558 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
559 struct super_block *sb = osb->sb;
560 struct ocfs2_local_disk_dqinfo *ldinfo;
561 struct buffer_head *bh;
565 struct inode *lqinode;
568 mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
569 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
570 for (type = 0; type < MAXQUOTAS; type++) {
571 if (list_empty(&(rec->r_list[type])))
573 mlog(0, "Recovering quota in slot %d\n", slot_num);
574 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
579 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
580 OCFS2_META_LOCK_NOQUEUE);
581 /* Someone else is holding the lock? Then he must be
582 * doing the recovery. Just skip the file... */
583 if (status == -EAGAIN) {
584 mlog(ML_NOTICE, "skipping quota recovery for slot %d "
585 "because quota file is locked.\n", slot_num);
588 } else if (status < 0) {
592 /* Now read local header */
594 status = ocfs2_read_quota_block(lqinode, 0, &bh);
597 mlog(ML_ERROR, "failed to read quota file info header "
598 "(slot=%d type=%d)\n", slot_num, type);
601 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
602 OCFS2_LOCAL_INFO_OFF);
603 /* Is recovery still needed? */
604 flags = le32_to_cpu(ldinfo->dqi_flags);
605 if (!(flags & OLQF_CLEAN))
606 status = ocfs2_recover_local_quota_file(lqinode,
609 /* We don't want to mark file as clean when it is actually
611 if (slot_num == osb->slot_num)
613 /* Mark quota file as clean if we are recovering quota file of
614 * some other node. */
615 handle = ocfs2_start_trans(osb,
616 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
617 if (IS_ERR(handle)) {
618 status = PTR_ERR(handle);
622 status = ocfs2_journal_access_dq(handle, lqinode, bh,
623 OCFS2_JOURNAL_ACCESS_WRITE);
629 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
631 status = ocfs2_journal_dirty(handle, bh);
635 ocfs2_commit_trans(osb, handle);
639 ocfs2_inode_unlock(lqinode, 1);
646 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
651 /* Read information header from quota file */
652 static int ocfs2_local_read_info(struct super_block *sb, int type)
654 struct ocfs2_local_disk_dqinfo *ldinfo;
655 struct mem_dqinfo *info = sb_dqinfo(sb, type);
656 struct ocfs2_mem_dqinfo *oinfo;
657 struct inode *lqinode = sb_dqopt(sb)->files[type];
659 struct buffer_head *bh = NULL;
660 struct ocfs2_quota_recovery *rec;
663 /* We don't need the lock and we have to acquire quota file locks
664 * which will later depend on this lock */
665 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
666 info->dqi_maxblimit = 0x7fffffffffffffffLL;
667 info->dqi_maxilimit = 0x7fffffffffffffffLL;
668 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
670 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
674 info->dqi_priv = oinfo;
675 oinfo->dqi_type = type;
676 INIT_LIST_HEAD(&oinfo->dqi_chunk);
677 oinfo->dqi_rec = NULL;
678 oinfo->dqi_lqi_bh = NULL;
679 oinfo->dqi_ibh = NULL;
681 status = ocfs2_global_read_info(sb, type);
685 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
692 /* Now read local header */
693 status = ocfs2_read_quota_block(lqinode, 0, &bh);
696 mlog(ML_ERROR, "failed to read quota file info header "
697 "(type=%d)\n", type);
700 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
701 OCFS2_LOCAL_INFO_OFF);
702 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
703 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
704 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
707 /* We crashed when using local quota file? */
708 if (!(info->dqi_flags & OLQF_CLEAN)) {
709 rec = OCFS2_SB(sb)->quota_rec;
711 rec = ocfs2_alloc_quota_recovery();
717 OCFS2_SB(sb)->quota_rec = rec;
720 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
728 status = ocfs2_load_local_quota_bitmaps(lqinode,
736 /* Now mark quota file as used */
737 info->dqi_flags &= ~OLQF_CLEAN;
738 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
744 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
748 iput(oinfo->dqi_gqinode);
749 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
750 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
751 brelse(oinfo->dqi_lqi_bh);
753 ocfs2_inode_unlock(lqinode, 1);
754 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
758 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
762 /* Write local info to quota file */
763 static int ocfs2_local_write_info(struct super_block *sb, int type)
765 struct mem_dqinfo *info = sb_dqinfo(sb, type);
766 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
770 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
780 /* Release info from memory */
781 static int ocfs2_local_free_info(struct super_block *sb, int type)
783 struct mem_dqinfo *info = sb_dqinfo(sb, type);
784 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
785 struct ocfs2_quota_chunk *chunk;
786 struct ocfs2_local_disk_chunk *dchunk;
787 int mark_clean = 1, len;
790 /* At this point we know there are no more dquots and thus
791 * even if there's some sync in the pdflush queue, it won't
792 * find any dquots and return without doing anything */
793 cancel_delayed_work_sync(&oinfo->dqi_sync_work);
794 iput(oinfo->dqi_gqinode);
795 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
796 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
797 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
798 dchunk = (struct ocfs2_local_disk_chunk *)
799 (chunk->qc_headerbh->b_data);
800 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
801 len = ol_chunk_entries(sb);
803 len = (oinfo->dqi_blocks -
804 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
805 * ol_quota_entries_per_block(sb);
807 /* Not all entries free? Bug! */
808 if (le32_to_cpu(dchunk->dqc_free) != len) {
809 mlog(ML_ERROR, "releasing quota file with used "
810 "entries (type=%d)\n", type);
814 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
816 /* dqonoff_mutex protects us against racing with recovery thread... */
817 if (oinfo->dqi_rec) {
818 ocfs2_free_quota_recovery(oinfo->dqi_rec);
825 /* Mark local file as clean */
826 info->dqi_flags |= OLQF_CLEAN;
827 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
837 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
838 brelse(oinfo->dqi_ibh);
839 brelse(oinfo->dqi_lqi_bh);
844 static void olq_set_dquot(struct buffer_head *bh, void *private)
846 struct ocfs2_dquot *od = private;
847 struct ocfs2_local_disk_dqblk *dqblk;
848 struct super_block *sb = od->dq_dquot.dq_sb;
850 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
851 + ol_dqblk_block_offset(sb, od->dq_local_off));
853 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
854 spin_lock(&dq_data_lock);
855 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
857 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
859 spin_unlock(&dq_data_lock);
860 mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
861 od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
862 (long long)le64_to_cpu(dqblk->dqb_inodemod));
865 /* Write dquot to local quota file */
866 static int ocfs2_local_write_dquot(struct dquot *dquot)
868 struct super_block *sb = dquot->dq_sb;
869 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
870 struct buffer_head *bh = NULL;
873 status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
874 ol_dqblk_file_block(sb, od->dq_local_off),
880 status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
891 /* Find free entry in local quota file */
892 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
896 struct mem_dqinfo *info = sb_dqinfo(sb, type);
897 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
898 struct ocfs2_quota_chunk *chunk;
899 struct ocfs2_local_disk_chunk *dchunk;
902 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
903 dchunk = (struct ocfs2_local_disk_chunk *)
904 chunk->qc_headerbh->b_data;
905 if (le32_to_cpu(dchunk->dqc_free) > 0) {
913 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
914 len = ol_chunk_entries(sb);
916 len = (oinfo->dqi_blocks -
917 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
918 * ol_quota_entries_per_block(sb);
921 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
924 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
925 " entries free (type=%d)\n", chunk->qc_num,
926 le32_to_cpu(dchunk->dqc_free), type);
927 return ERR_PTR(-EIO);
933 /* Add new chunk to the local quota file */
934 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
935 struct super_block *sb,
939 struct mem_dqinfo *info = sb_dqinfo(sb, type);
940 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
941 struct inode *lqinode = sb_dqopt(sb)->files[type];
942 struct ocfs2_quota_chunk *chunk = NULL;
943 struct ocfs2_local_disk_chunk *dchunk;
946 struct buffer_head *bh = NULL, *dbh = NULL;
949 /* We are protected by dqio_sem so no locking needed */
950 status = ocfs2_extend_no_holes(lqinode,
951 lqinode->i_size + 2 * sb->s_blocksize,
957 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
958 lqinode->i_size + 2 * sb->s_blocksize);
964 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
970 /* Local quota info and two new blocks we initialize */
971 handle = ocfs2_start_trans(OCFS2_SB(sb),
972 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
973 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
974 if (IS_ERR(handle)) {
975 status = PTR_ERR(handle);
980 /* Initialize chunk header */
981 down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
982 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
983 &p_blkno, NULL, NULL);
984 up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
989 bh = sb_getblk(sb, p_blkno);
995 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
996 ocfs2_set_new_buffer_uptodate(lqinode, bh);
997 status = ocfs2_journal_access_dq(handle, lqinode, bh,
998 OCFS2_JOURNAL_ACCESS_CREATE);
1004 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1005 memset(dchunk->dqc_bitmap, 0,
1006 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1007 OCFS2_QBLK_RESERVED_SPACE);
1009 status = ocfs2_journal_dirty(handle, bh);
1015 /* Initialize new block with structures */
1016 down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
1017 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1018 &p_blkno, NULL, NULL);
1019 up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
1024 dbh = sb_getblk(sb, p_blkno);
1030 ocfs2_set_new_buffer_uptodate(lqinode, dbh);
1031 status = ocfs2_journal_access_dq(handle, lqinode, dbh,
1032 OCFS2_JOURNAL_ACCESS_CREATE);
1038 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1040 status = ocfs2_journal_dirty(handle, dbh);
1046 /* Update local quotafile info */
1047 oinfo->dqi_blocks += 2;
1048 oinfo->dqi_chunks++;
1049 status = ocfs2_local_write_info(sb, type);
1054 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1060 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1061 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1062 struct ocfs2_quota_chunk,
1063 qc_chunk)->qc_num + 1;
1064 chunk->qc_headerbh = bh;
1068 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1072 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1073 return ERR_PTR(status);
1076 /* Find free entry in local quota file */
1077 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1078 struct super_block *sb,
1082 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1083 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1084 struct ocfs2_quota_chunk *chunk;
1085 struct inode *lqinode = sb_dqopt(sb)->files[type];
1086 struct ocfs2_local_disk_chunk *dchunk;
1087 int epb = ol_quota_entries_per_block(sb);
1088 unsigned int chunk_blocks;
1089 struct buffer_head *bh;
1094 if (list_empty(&oinfo->dqi_chunk))
1095 return ocfs2_local_quota_add_chunk(sb, type, offset);
1096 /* Is the last chunk full? */
1097 chunk = list_entry(oinfo->dqi_chunk.prev,
1098 struct ocfs2_quota_chunk, qc_chunk);
1099 chunk_blocks = oinfo->dqi_blocks -
1100 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1101 if (ol_chunk_blocks(sb) == chunk_blocks)
1102 return ocfs2_local_quota_add_chunk(sb, type, offset);
1104 /* We are protected by dqio_sem so no locking needed */
1105 status = ocfs2_extend_no_holes(lqinode,
1106 lqinode->i_size + sb->s_blocksize,
1112 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1113 lqinode->i_size + sb->s_blocksize);
1119 /* Get buffer from the just added block */
1120 down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
1121 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1122 &p_blkno, NULL, NULL);
1123 up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
1128 bh = sb_getblk(sb, p_blkno);
1134 ocfs2_set_new_buffer_uptodate(lqinode, bh);
1136 /* Local quota info, chunk header and the new block we initialize */
1137 handle = ocfs2_start_trans(OCFS2_SB(sb),
1138 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1139 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1140 if (IS_ERR(handle)) {
1141 status = PTR_ERR(handle);
1145 /* Zero created block */
1146 status = ocfs2_journal_access_dq(handle, lqinode, bh,
1147 OCFS2_JOURNAL_ACCESS_CREATE);
1153 memset(bh->b_data, 0, sb->s_blocksize);
1155 status = ocfs2_journal_dirty(handle, bh);
1160 /* Update chunk header */
1161 status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh,
1162 OCFS2_JOURNAL_ACCESS_WRITE);
1168 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1169 lock_buffer(chunk->qc_headerbh);
1170 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1171 unlock_buffer(chunk->qc_headerbh);
1172 status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1177 /* Update file header */
1178 oinfo->dqi_blocks++;
1179 status = ocfs2_local_write_info(sb, type);
1185 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1190 *offset = chunk_blocks * epb;
1193 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1195 return ERR_PTR(status);
1198 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1200 int *offset = private;
1201 struct ocfs2_local_disk_chunk *dchunk;
1203 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1204 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1205 le32_add_cpu(&dchunk->dqc_free, -1);
1208 /* Create dquot in the local file for given id */
1209 static int ocfs2_create_local_dquot(struct dquot *dquot)
1211 struct super_block *sb = dquot->dq_sb;
1212 int type = dquot->dq_type;
1213 struct inode *lqinode = sb_dqopt(sb)->files[type];
1214 struct ocfs2_quota_chunk *chunk;
1215 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1219 chunk = ocfs2_find_free_entry(sb, type, &offset);
1221 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1223 return PTR_ERR(chunk);
1224 } else if (IS_ERR(chunk)) {
1225 return PTR_ERR(chunk);
1227 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1228 od->dq_chunk = chunk;
1230 /* Initialize dquot structure on disk */
1231 status = ocfs2_local_write_dquot(dquot);
1237 /* Mark structure as allocated */
1238 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1248 /* Create entry in local file for dquot, load data from the global file */
1249 static int ocfs2_local_read_dquot(struct dquot *dquot)
1253 mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
1255 status = ocfs2_global_read_dquot(dquot);
1261 /* Now create entry in the local quota file */
1262 status = ocfs2_create_local_dquot(dquot);
1274 /* Release dquot structure from local quota file. ocfs2_release_dquot() has
1275 * already started a transaction and obtained exclusive lock for global
1277 static int ocfs2_local_release_dquot(struct dquot *dquot)
1280 int type = dquot->dq_type;
1281 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1282 struct super_block *sb = dquot->dq_sb;
1283 struct ocfs2_local_disk_chunk *dchunk;
1285 handle_t *handle = journal_current_handle();
1288 /* First write all local changes to global file */
1289 status = ocfs2_global_release_dquot(dquot);
1295 status = ocfs2_journal_access_dq(handle, sb_dqopt(sb)->files[type],
1296 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1301 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1303 dchunk = (struct ocfs2_local_disk_chunk *)
1304 (od->dq_chunk->qc_headerbh->b_data);
1305 /* Mark structure as freed */
1306 lock_buffer(od->dq_chunk->qc_headerbh);
1307 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1308 le32_add_cpu(&dchunk->dqc_free, 1);
1309 unlock_buffer(od->dq_chunk->qc_headerbh);
1310 status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1317 /* Clear the read bit so that next time someone uses this
1318 * dquot he reads fresh info from disk and allocates local
1319 * dquot structure */
1320 clear_bit(DQ_READ_B, &dquot->dq_flags);
1324 static struct quota_format_ops ocfs2_format_ops = {
1325 .check_quota_file = ocfs2_local_check_quota_file,
1326 .read_file_info = ocfs2_local_read_info,
1327 .write_file_info = ocfs2_global_write_info,
1328 .free_file_info = ocfs2_local_free_info,
1329 .read_dqblk = ocfs2_local_read_dquot,
1330 .commit_dqblk = ocfs2_local_write_dquot,
1331 .release_dqblk = ocfs2_local_release_dquot,
1334 struct quota_format_type ocfs2_quota_format = {
1335 .qf_fmt_id = QFMT_OCFS2,
1336 .qf_ops = &ocfs2_format_ops,
1337 .qf_owner = THIS_MODULE