2 * Implementation of operations over local quota file
6 #include <linux/slab.h>
7 #include <linux/quota.h>
8 #include <linux/quotaops.h>
9 #include <linux/module.h>
11 #define MLOG_MASK_PREFIX ML_QUOTA
12 #include <cluster/masklog.h>
19 #include "buffer_head_io.h"
27 /* Number of local quota structures per block */
28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
30 return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
31 sizeof(struct ocfs2_local_disk_dqblk));
34 /* Number of blocks with entries in one chunk */
35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
37 return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
38 OCFS2_QBLK_RESERVED_SPACE) << 3) /
39 ol_quota_entries_per_block(sb);
42 /* Number of entries in a chunk bitmap */
43 static unsigned int ol_chunk_entries(struct super_block *sb)
45 return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
48 /* Offset of the chunk in quota file */
49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
51 /* 1 block for local quota file info, 1 block per chunk for chunk info */
52 return 1 + (ol_chunk_blocks(sb) + 1) * c;
55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
57 int epb = ol_quota_entries_per_block(sb);
59 return ol_quota_chunk_block(sb, c) + 1 + off / epb;
62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
64 int epb = ol_quota_entries_per_block(sb);
66 return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
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)
72 return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
73 ol_dqblk_block_off(sb, c, off);
76 /* Compute block number from given offset */
77 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
79 return off >> sb->s_blocksize_bits;
82 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
84 return off & ((1 << sb->s_blocksize_bits) - 1);
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)
90 int epb = ol_quota_entries_per_block(sb);
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);
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)
102 struct super_block *sb = inode->i_sb;
106 handle = ocfs2_start_trans(OCFS2_SB(sb),
107 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
108 if (IS_ERR(handle)) {
109 status = PTR_ERR(handle);
113 status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
114 OCFS2_JOURNAL_ACCESS_WRITE);
117 ocfs2_commit_trans(OCFS2_SB(sb), handle);
123 ocfs2_journal_dirty(handle, bh);
125 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
134 * Read quota block from a given logical offset.
136 * This function acquires ip_alloc_sem and thus it must not be called with a
137 * transaction started.
139 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
140 struct buffer_head **bh)
143 struct buffer_head *tmp = *bh;
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));
154 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
155 ocfs2_validate_quota_block);
159 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
166 /* Check whether we understand format of quota files */
167 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
169 unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
170 unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
171 unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
172 unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
173 unsigned int ino[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;
181 /* First check whether we understand local quota file */
182 status = ocfs2_read_quota_block(linode, 0, &bh);
185 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
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);
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);
205 /* Next check whether we understand global quota file */
206 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
209 mlog(ML_ERROR, "cannot get global quota file inode "
210 "(type=%d)\n", type);
213 /* Since the header is read only, we don't care about locking */
214 status = ocfs2_read_quota_block(ginode, 0, &bh);
217 mlog(ML_ERROR, "failed to read global quota file header "
218 "(type=%d)\n", type);
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);
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],
243 /* Release given list of quota file chunks */
244 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
246 struct ocfs2_quota_chunk *pos, *next;
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);
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)
260 struct ocfs2_quota_chunk *newchunk;
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);
267 ocfs2_release_local_quota_bitmaps(head);
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);
277 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
278 ocfs2_release_local_quota_bitmaps(head);
281 list_add_tail(&newchunk->qc_chunk, head);
286 static void olq_update_info(struct buffer_head *bh, void *private)
288 struct mem_dqinfo *info = private;
289 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
290 struct ocfs2_local_disk_dqinfo *ldinfo;
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);
301 static int ocfs2_add_recovery_chunk(struct super_block *sb,
302 struct ocfs2_local_disk_chunk *dchunk,
304 struct list_head *head)
306 struct ocfs2_recovery_chunk *rc;
308 rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
311 rc->rc_chunk = chunk;
312 rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
313 if (!rc->rc_bitmap) {
317 memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
318 (ol_chunk_entries(sb) + 7) >> 3);
319 list_add_tail(&rc->rc_list, head);
323 static void free_recovery_list(struct list_head *head)
325 struct ocfs2_recovery_chunk *next;
326 struct ocfs2_recovery_chunk *rchunk;
328 list_for_each_entry_safe(rchunk, next, head, rc_list) {
329 list_del(&rchunk->rc_list);
330 kfree(rchunk->rc_bitmap);
335 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
339 for (type = 0; type < MAXQUOTAS; type++)
340 free_recovery_list(&(rec->r_list[type]));
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,
348 struct list_head *head)
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);
356 for (i = 0; i < chunks; i++) {
358 status = ocfs2_read_quota_block(lqinode,
359 ol_quota_chunk_block(sb, i),
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);
373 free_recovery_list(head);
377 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
380 struct ocfs2_quota_recovery *rec;
382 rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
385 for (type = 0; type < MAXQUOTAS; type++)
386 INIT_LIST_HEAD(&(rec->r_list[type]));
390 /* Load information we need for quota recovery into memory */
391 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
392 struct ocfs2_super *osb,
395 unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
396 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
397 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
398 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
399 struct super_block *sb = osb->sb;
400 struct ocfs2_local_disk_dqinfo *ldinfo;
401 struct inode *lqinode;
402 struct buffer_head *bh;
405 struct ocfs2_quota_recovery *rec;
407 mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
408 rec = ocfs2_alloc_quota_recovery();
410 return ERR_PTR(-ENOMEM);
413 for (type = 0; type < MAXQUOTAS; type++) {
414 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
416 /* At this point, journal of the slot is already replayed so
417 * we can trust metadata and data of the quota file */
418 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
423 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
424 OCFS2_META_LOCK_RECOVERY);
429 /* Now read local header */
431 status = ocfs2_read_quota_block(lqinode, 0, &bh);
434 mlog(ML_ERROR, "failed to read quota file info header "
435 "(slot=%d type=%d)\n", slot_num, type);
438 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
439 OCFS2_LOCAL_INFO_OFF);
440 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
444 ocfs2_inode_unlock(lqinode, 1);
452 ocfs2_free_quota_recovery(rec);
453 rec = ERR_PTR(status);
458 /* Sync changes in local quota file into global quota file and
459 * reinitialize local quota file.
460 * The function expects local quota file to be already locked and
461 * dqonoff_mutex locked. */
462 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
464 struct ocfs2_quota_recovery *rec)
466 struct super_block *sb = lqinode->i_sb;
467 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
468 struct ocfs2_local_disk_chunk *dchunk;
469 struct ocfs2_local_disk_dqblk *dqblk;
472 struct buffer_head *hbh = NULL, *qbh = NULL;
475 struct ocfs2_recovery_chunk *rchunk, *next;
476 qsize_t spacechange, inodechange;
478 mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
480 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
481 chunk = rchunk->rc_chunk;
483 status = ocfs2_read_quota_block(lqinode,
484 ol_quota_chunk_block(sb, chunk),
490 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
491 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
493 status = ocfs2_read_quota_block(lqinode,
494 ol_dqblk_block(sb, chunk, bit),
500 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
501 ol_dqblk_block_off(sb, chunk, bit));
502 dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
505 mlog(ML_ERROR, "Failed to get quota structure "
506 "for id %u, type %d. Cannot finish quota "
508 (unsigned)le64_to_cpu(dqblk->dqb_id),
512 status = ocfs2_lock_global_qf(oinfo, 1);
518 handle = ocfs2_start_trans(OCFS2_SB(sb),
519 OCFS2_QSYNC_CREDITS);
520 if (IS_ERR(handle)) {
521 status = PTR_ERR(handle);
525 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
526 spin_lock(&dq_data_lock);
527 /* Add usage from quota entry into quota changes
528 * of our node. Auxiliary variables are important
529 * due to signedness */
530 spacechange = le64_to_cpu(dqblk->dqb_spacemod);
531 inodechange = le64_to_cpu(dqblk->dqb_inodemod);
532 dquot->dq_dqb.dqb_curspace += spacechange;
533 dquot->dq_dqb.dqb_curinodes += inodechange;
534 spin_unlock(&dq_data_lock);
535 /* We want to drop reference held by the crashed
536 * node. Since we have our own reference we know
537 * global structure actually won't be freed. */
538 status = ocfs2_global_release_dquot(dquot);
543 /* Release local quota file entry */
544 status = ocfs2_journal_access_dq(handle,
545 INODE_CACHE(lqinode),
546 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
552 WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
553 ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
554 le32_add_cpu(&dchunk->dqc_free, 1);
556 ocfs2_journal_dirty(handle, qbh);
558 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
559 ocfs2_commit_trans(OCFS2_SB(sb), handle);
561 ocfs2_unlock_global_qf(oinfo, 1);
570 list_del(&rchunk->rc_list);
571 kfree(rchunk->rc_bitmap);
577 free_recovery_list(&(rec->r_list[type]));
582 /* Recover local quota files for given node different from us */
583 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
584 struct ocfs2_quota_recovery *rec,
587 unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
588 LOCAL_GROUP_QUOTA_SYSTEM_INODE };
589 struct super_block *sb = osb->sb;
590 struct ocfs2_local_disk_dqinfo *ldinfo;
591 struct buffer_head *bh;
595 struct inode *lqinode;
598 mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
599 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
600 for (type = 0; type < MAXQUOTAS; type++) {
601 if (list_empty(&(rec->r_list[type])))
603 mlog(0, "Recovering quota in slot %d\n", slot_num);
604 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
609 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
610 OCFS2_META_LOCK_NOQUEUE);
611 /* Someone else is holding the lock? Then he must be
612 * doing the recovery. Just skip the file... */
613 if (status == -EAGAIN) {
614 mlog(ML_NOTICE, "skipping quota recovery for slot %d "
615 "because quota file is locked.\n", slot_num);
618 } else if (status < 0) {
622 /* Now read local header */
624 status = ocfs2_read_quota_block(lqinode, 0, &bh);
627 mlog(ML_ERROR, "failed to read quota file info header "
628 "(slot=%d type=%d)\n", slot_num, type);
631 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
632 OCFS2_LOCAL_INFO_OFF);
633 /* Is recovery still needed? */
634 flags = le32_to_cpu(ldinfo->dqi_flags);
635 if (!(flags & OLQF_CLEAN))
636 status = ocfs2_recover_local_quota_file(lqinode,
639 /* We don't want to mark file as clean when it is actually
641 if (slot_num == osb->slot_num)
643 /* Mark quota file as clean if we are recovering quota file of
644 * some other node. */
645 handle = ocfs2_start_trans(osb,
646 OCFS2_LOCAL_QINFO_WRITE_CREDITS);
647 if (IS_ERR(handle)) {
648 status = PTR_ERR(handle);
652 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
654 OCFS2_JOURNAL_ACCESS_WRITE);
660 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
662 ocfs2_journal_dirty(handle, bh);
664 ocfs2_commit_trans(osb, handle);
668 ocfs2_inode_unlock(lqinode, 1);
675 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
680 /* Read information header from quota file */
681 static int ocfs2_local_read_info(struct super_block *sb, int type)
683 struct ocfs2_local_disk_dqinfo *ldinfo;
684 struct mem_dqinfo *info = sb_dqinfo(sb, type);
685 struct ocfs2_mem_dqinfo *oinfo;
686 struct inode *lqinode = sb_dqopt(sb)->files[type];
688 struct buffer_head *bh = NULL;
689 struct ocfs2_quota_recovery *rec;
692 /* We don't need the lock and we have to acquire quota file locks
693 * which will later depend on this lock */
694 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
695 info->dqi_maxblimit = 0x7fffffffffffffffLL;
696 info->dqi_maxilimit = 0x7fffffffffffffffLL;
697 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
699 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
703 info->dqi_priv = oinfo;
704 oinfo->dqi_type = type;
705 INIT_LIST_HEAD(&oinfo->dqi_chunk);
706 oinfo->dqi_rec = NULL;
707 oinfo->dqi_lqi_bh = NULL;
708 oinfo->dqi_libh = NULL;
710 status = ocfs2_global_read_info(sb, type);
714 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
721 /* Now read local header */
722 status = ocfs2_read_quota_block(lqinode, 0, &bh);
725 mlog(ML_ERROR, "failed to read quota file info header "
726 "(type=%d)\n", type);
729 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
730 OCFS2_LOCAL_INFO_OFF);
731 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
732 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
733 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
734 oinfo->dqi_libh = bh;
736 /* We crashed when using local quota file? */
737 if (!(info->dqi_flags & OLQF_CLEAN)) {
738 rec = OCFS2_SB(sb)->quota_rec;
740 rec = ocfs2_alloc_quota_recovery();
746 OCFS2_SB(sb)->quota_rec = rec;
749 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
757 status = ocfs2_load_local_quota_bitmaps(lqinode,
765 /* Now mark quota file as used */
766 info->dqi_flags &= ~OLQF_CLEAN;
767 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
773 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
777 iput(oinfo->dqi_gqinode);
778 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
779 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
780 brelse(oinfo->dqi_lqi_bh);
782 ocfs2_inode_unlock(lqinode, 1);
783 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
787 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
791 /* Write local info to quota file */
792 static int ocfs2_local_write_info(struct super_block *sb, int type)
794 struct mem_dqinfo *info = sb_dqinfo(sb, type);
795 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
799 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
809 /* Release info from memory */
810 static int ocfs2_local_free_info(struct super_block *sb, int type)
812 struct mem_dqinfo *info = sb_dqinfo(sb, type);
813 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
814 struct ocfs2_quota_chunk *chunk;
815 struct ocfs2_local_disk_chunk *dchunk;
816 int mark_clean = 1, len;
819 iput(oinfo->dqi_gqinode);
820 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
821 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
822 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
823 dchunk = (struct ocfs2_local_disk_chunk *)
824 (chunk->qc_headerbh->b_data);
825 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
826 len = ol_chunk_entries(sb);
828 len = (oinfo->dqi_blocks -
829 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
830 * ol_quota_entries_per_block(sb);
832 /* Not all entries free? Bug! */
833 if (le32_to_cpu(dchunk->dqc_free) != len) {
834 mlog(ML_ERROR, "releasing quota file with used "
835 "entries (type=%d)\n", type);
839 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
841 /* dqonoff_mutex protects us against racing with recovery thread... */
842 if (oinfo->dqi_rec) {
843 ocfs2_free_quota_recovery(oinfo->dqi_rec);
850 /* Mark local file as clean */
851 info->dqi_flags |= OLQF_CLEAN;
852 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
862 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
863 brelse(oinfo->dqi_libh);
864 brelse(oinfo->dqi_lqi_bh);
869 static void olq_set_dquot(struct buffer_head *bh, void *private)
871 struct ocfs2_dquot *od = private;
872 struct ocfs2_local_disk_dqblk *dqblk;
873 struct super_block *sb = od->dq_dquot.dq_sb;
875 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
876 + ol_dqblk_block_offset(sb, od->dq_local_off));
878 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
879 spin_lock(&dq_data_lock);
880 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
882 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
884 spin_unlock(&dq_data_lock);
885 mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
886 od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod),
887 (long long)le64_to_cpu(dqblk->dqb_inodemod));
890 /* Write dquot to local quota file */
891 int ocfs2_local_write_dquot(struct dquot *dquot)
893 struct super_block *sb = dquot->dq_sb;
894 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
895 struct buffer_head *bh;
896 struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
899 status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
905 status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
915 /* Find free entry in local quota file */
916 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
920 struct mem_dqinfo *info = sb_dqinfo(sb, type);
921 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
922 struct ocfs2_quota_chunk *chunk;
923 struct ocfs2_local_disk_chunk *dchunk;
926 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
927 dchunk = (struct ocfs2_local_disk_chunk *)
928 chunk->qc_headerbh->b_data;
929 if (le32_to_cpu(dchunk->dqc_free) > 0) {
937 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
938 len = ol_chunk_entries(sb);
940 len = (oinfo->dqi_blocks -
941 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
942 * ol_quota_entries_per_block(sb);
945 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
948 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
949 " entries free (type=%d)\n", chunk->qc_num,
950 le32_to_cpu(dchunk->dqc_free), type);
951 return ERR_PTR(-EIO);
957 /* Add new chunk to the local quota file */
958 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
959 struct super_block *sb,
963 struct mem_dqinfo *info = sb_dqinfo(sb, type);
964 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
965 struct inode *lqinode = sb_dqopt(sb)->files[type];
966 struct ocfs2_quota_chunk *chunk = NULL;
967 struct ocfs2_local_disk_chunk *dchunk;
970 struct buffer_head *bh = NULL, *dbh = NULL;
973 /* We are protected by dqio_sem so no locking needed */
974 status = ocfs2_extend_no_holes(lqinode, NULL,
975 lqinode->i_size + 2 * sb->s_blocksize,
981 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
982 lqinode->i_size + 2 * sb->s_blocksize);
988 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
994 /* Local quota info and two new blocks we initialize */
995 handle = ocfs2_start_trans(OCFS2_SB(sb),
996 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
997 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
998 if (IS_ERR(handle)) {
999 status = PTR_ERR(handle);
1004 /* Initialize chunk header */
1005 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1006 &p_blkno, NULL, NULL);
1011 bh = sb_getblk(sb, p_blkno);
1017 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1018 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1019 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1020 OCFS2_JOURNAL_ACCESS_CREATE);
1026 dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1027 memset(dchunk->dqc_bitmap, 0,
1028 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1029 OCFS2_QBLK_RESERVED_SPACE);
1031 ocfs2_journal_dirty(handle, bh);
1033 /* Initialize new block with structures */
1034 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1035 &p_blkno, NULL, NULL);
1040 dbh = sb_getblk(sb, p_blkno);
1046 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1047 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1048 OCFS2_JOURNAL_ACCESS_CREATE);
1054 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1056 ocfs2_journal_dirty(handle, dbh);
1058 /* Update local quotafile info */
1059 oinfo->dqi_blocks += 2;
1060 oinfo->dqi_chunks++;
1061 status = ocfs2_local_write_info(sb, type);
1066 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1072 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1073 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1074 struct ocfs2_quota_chunk,
1075 qc_chunk)->qc_num + 1;
1076 chunk->qc_headerbh = bh;
1080 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1084 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1085 return ERR_PTR(status);
1088 /* Find free entry in local quota file */
1089 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1090 struct super_block *sb,
1094 struct mem_dqinfo *info = sb_dqinfo(sb, type);
1095 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1096 struct ocfs2_quota_chunk *chunk;
1097 struct inode *lqinode = sb_dqopt(sb)->files[type];
1098 struct ocfs2_local_disk_chunk *dchunk;
1099 int epb = ol_quota_entries_per_block(sb);
1100 unsigned int chunk_blocks;
1101 struct buffer_head *bh;
1106 if (list_empty(&oinfo->dqi_chunk))
1107 return ocfs2_local_quota_add_chunk(sb, type, offset);
1108 /* Is the last chunk full? */
1109 chunk = list_entry(oinfo->dqi_chunk.prev,
1110 struct ocfs2_quota_chunk, qc_chunk);
1111 chunk_blocks = oinfo->dqi_blocks -
1112 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1113 if (ol_chunk_blocks(sb) == chunk_blocks)
1114 return ocfs2_local_quota_add_chunk(sb, type, offset);
1116 /* We are protected by dqio_sem so no locking needed */
1117 status = ocfs2_extend_no_holes(lqinode, NULL,
1118 lqinode->i_size + sb->s_blocksize,
1124 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1125 lqinode->i_size + sb->s_blocksize);
1131 /* Get buffer from the just added block */
1132 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1133 &p_blkno, NULL, NULL);
1138 bh = sb_getblk(sb, p_blkno);
1144 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1146 /* Local quota info, chunk header and the new block we initialize */
1147 handle = ocfs2_start_trans(OCFS2_SB(sb),
1148 OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1149 2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1150 if (IS_ERR(handle)) {
1151 status = PTR_ERR(handle);
1155 /* Zero created block */
1156 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1157 OCFS2_JOURNAL_ACCESS_CREATE);
1163 memset(bh->b_data, 0, sb->s_blocksize);
1165 ocfs2_journal_dirty(handle, bh);
1167 /* Update chunk header */
1168 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1170 OCFS2_JOURNAL_ACCESS_WRITE);
1176 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1177 lock_buffer(chunk->qc_headerbh);
1178 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1179 unlock_buffer(chunk->qc_headerbh);
1180 ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1182 /* Update file header */
1183 oinfo->dqi_blocks++;
1184 status = ocfs2_local_write_info(sb, type);
1190 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1195 *offset = chunk_blocks * epb;
1198 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1200 return ERR_PTR(status);
1203 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1205 int *offset = private;
1206 struct ocfs2_local_disk_chunk *dchunk;
1208 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1209 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
1210 le32_add_cpu(&dchunk->dqc_free, -1);
1213 /* Create dquot in the local file for given id */
1214 int ocfs2_create_local_dquot(struct dquot *dquot)
1216 struct super_block *sb = dquot->dq_sb;
1217 int type = dquot->dq_type;
1218 struct inode *lqinode = sb_dqopt(sb)->files[type];
1219 struct ocfs2_quota_chunk *chunk;
1220 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1225 down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1226 chunk = ocfs2_find_free_entry(sb, type, &offset);
1228 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1229 if (IS_ERR(chunk)) {
1230 status = PTR_ERR(chunk);
1233 } else if (IS_ERR(chunk)) {
1234 status = PTR_ERR(chunk);
1237 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1238 od->dq_chunk = chunk;
1239 status = ocfs2_extent_map_get_blocks(lqinode,
1240 ol_dqblk_block(sb, chunk->qc_num, offset),
1241 &od->dq_local_phys_blk,
1245 /* Initialize dquot structure on disk */
1246 status = ocfs2_local_write_dquot(dquot);
1252 /* Mark structure as allocated */
1253 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1260 up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1265 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1266 * already started a transaction and written all changes to global quota file
1268 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1271 int type = dquot->dq_type;
1272 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1273 struct super_block *sb = dquot->dq_sb;
1274 struct ocfs2_local_disk_chunk *dchunk;
1277 status = ocfs2_journal_access_dq(handle,
1278 INODE_CACHE(sb_dqopt(sb)->files[type]),
1279 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1284 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1286 dchunk = (struct ocfs2_local_disk_chunk *)
1287 (od->dq_chunk->qc_headerbh->b_data);
1288 /* Mark structure as freed */
1289 lock_buffer(od->dq_chunk->qc_headerbh);
1290 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
1291 le32_add_cpu(&dchunk->dqc_free, 1);
1292 unlock_buffer(od->dq_chunk->qc_headerbh);
1293 ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1296 /* Clear the read bit so that next time someone uses this
1297 * dquot he reads fresh info from disk and allocates local
1298 * dquot structure */
1299 clear_bit(DQ_READ_B, &dquot->dq_flags);
1303 static const struct quota_format_ops ocfs2_format_ops = {
1304 .check_quota_file = ocfs2_local_check_quota_file,
1305 .read_file_info = ocfs2_local_read_info,
1306 .write_file_info = ocfs2_global_write_info,
1307 .free_file_info = ocfs2_local_free_info,
1310 struct quota_format_type ocfs2_quota_format = {
1311 .qf_fmt_id = QFMT_OCFS2,
1312 .qf_ops = &ocfs2_format_ops,
1313 .qf_owner = THIS_MODULE