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 #include <cluster/masklog.h>
18 #include "buffer_head_io.h"
25 #include "ocfs2_trace.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[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;
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 < OCFS2_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 < OCFS2_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[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;
406 struct ocfs2_quota_recovery *rec;
408 printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
409 "slot %u\n", osb->dev_str, slot_num);
411 rec = ocfs2_alloc_quota_recovery();
413 return ERR_PTR(-ENOMEM);
416 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
417 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
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);
426 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
427 OCFS2_META_LOCK_RECOVERY);
432 /* Now read local header */
434 status = ocfs2_read_quota_block(lqinode, 0, &bh);
437 mlog(ML_ERROR, "failed to read quota file info header "
438 "(slot=%d type=%d)\n", slot_num, type);
441 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
442 OCFS2_LOCAL_INFO_OFF);
443 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
447 ocfs2_inode_unlock(lqinode, 1);
455 ocfs2_free_quota_recovery(rec);
456 rec = ERR_PTR(status);
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,
467 struct ocfs2_quota_recovery *rec)
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;
475 struct buffer_head *hbh = NULL, *qbh = NULL;
478 struct ocfs2_recovery_chunk *rchunk, *next;
479 qsize_t spacechange, inodechange;
481 trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
483 list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
484 chunk = rchunk->rc_chunk;
486 status = ocfs2_read_quota_block(lqinode,
487 ol_quota_chunk_block(sb, chunk),
493 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
494 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
496 status = ocfs2_read_quota_block(lqinode,
497 ol_dqblk_block(sb, chunk, bit),
503 dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
504 ol_dqblk_block_off(sb, chunk, bit));
506 make_kqid(&init_user_ns, type,
507 le64_to_cpu(dqblk->dqb_id)));
510 mlog(ML_ERROR, "Failed to get quota structure "
511 "for id %u, type %d. Cannot finish quota "
513 (unsigned)le64_to_cpu(dqblk->dqb_id),
517 status = ocfs2_lock_global_qf(oinfo, 1);
523 handle = ocfs2_start_trans(OCFS2_SB(sb),
524 OCFS2_QSYNC_CREDITS);
525 if (IS_ERR(handle)) {
526 status = PTR_ERR(handle);
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);
548 /* Release local quota file entry */
549 status = ocfs2_journal_access_dq(handle,
550 INODE_CACHE(lqinode),
551 qbh, OCFS2_JOURNAL_ACCESS_WRITE);
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);
561 ocfs2_journal_dirty(handle, qbh);
563 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
564 ocfs2_commit_trans(OCFS2_SB(sb), handle);
566 ocfs2_unlock_global_qf(oinfo, 1);
575 list_del(&rchunk->rc_list);
576 kfree(rchunk->rc_bitmap);
582 free_recovery_list(&(rec->r_list[type]));
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,
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;
601 struct inode *lqinode;
604 printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
605 "slot %u\n", osb->dev_str, slot_num);
607 mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
608 for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
609 if (list_empty(&(rec->r_list[type])))
611 trace_ocfs2_finish_quota_recovery(slot_num);
612 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
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);
627 } else if (status < 0) {
631 /* Now read local header */
633 status = ocfs2_read_quota_block(lqinode, 0, &bh);
636 mlog(ML_ERROR, "failed to read quota file info header "
637 "(slot=%d type=%d)\n", slot_num, type);
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,
648 /* We don't want to mark file as clean when it is actually
650 if (slot_num == osb->slot_num)
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);
661 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
663 OCFS2_JOURNAL_ACCESS_WRITE);
669 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
671 ocfs2_journal_dirty(handle, bh);
673 ocfs2_commit_trans(osb, handle);
677 ocfs2_inode_unlock(lqinode, 1);
684 mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
689 /* Read information header from quota file */
690 static int ocfs2_local_read_info(struct super_block *sb, int type)
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];
697 struct buffer_head *bh = NULL;
698 struct ocfs2_quota_recovery *rec;
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_maxblimit = 0x7fffffffffffffffLL;
705 info->dqi_maxilimit = 0x7fffffffffffffffLL;
706 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
708 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
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;
719 status = ocfs2_global_read_info(sb, type);
723 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
730 /* Now read local header */
731 status = ocfs2_read_quota_block(lqinode, 0, &bh);
734 mlog(ML_ERROR, "failed to read quota file info header "
735 "(type=%d)\n", type);
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;
745 /* We crashed when using local quota file? */
746 if (!(info->dqi_flags & OLQF_CLEAN)) {
747 rec = OCFS2_SB(sb)->quota_rec;
749 rec = ocfs2_alloc_quota_recovery();
755 OCFS2_SB(sb)->quota_rec = rec;
758 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
766 status = ocfs2_load_local_quota_bitmaps(lqinode,
774 /* Now mark quota file as used */
775 info->dqi_flags &= ~OLQF_CLEAN;
776 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
782 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
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);
791 ocfs2_inode_unlock(lqinode, 1);
792 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
796 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
800 /* Write local info to quota file */
801 static int ocfs2_local_write_info(struct super_block *sb, int type)
803 struct mem_dqinfo *info = sb_dqinfo(sb, type);
804 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
808 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
818 /* Release info from memory */
819 static int ocfs2_local_free_info(struct super_block *sb, int type)
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;
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);
837 len = (oinfo->dqi_blocks -
838 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
839 * ol_quota_entries_per_block(sb);
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);
848 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
850 /* dqonoff_mutex protects us against racing with recovery thread... */
851 if (oinfo->dqi_rec) {
852 ocfs2_free_quota_recovery(oinfo->dqi_rec);
859 /* Mark local file as clean */
860 info->dqi_flags |= OLQF_CLEAN;
861 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
871 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
872 brelse(oinfo->dqi_libh);
873 brelse(oinfo->dqi_lqi_bh);
878 static void olq_set_dquot(struct buffer_head *bh, void *private)
880 struct ocfs2_dquot *od = private;
881 struct ocfs2_local_disk_dqblk *dqblk;
882 struct super_block *sb = od->dq_dquot.dq_sb;
884 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
885 + ol_dqblk_block_offset(sb, od->dq_local_off));
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 -
892 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
894 spin_unlock(&dq_data_lock);
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));
901 /* Write dquot to local quota file */
902 int ocfs2_local_write_dquot(struct dquot *dquot)
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];
910 status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
916 status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
926 /* Find free entry in local quota file */
927 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
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;
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) {
948 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
949 len = ol_chunk_entries(sb);
951 len = (oinfo->dqi_blocks -
952 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
953 * ol_quota_entries_per_block(sb);
956 found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
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);
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,
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;
981 struct buffer_head *bh = NULL, *dbh = NULL;
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));
992 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
993 i_size_read(lqinode) + 2 * sb->s_blocksize);
999 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
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);
1015 /* Initialize chunk header */
1016 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1017 &p_blkno, NULL, NULL);
1022 bh = sb_getblk(sb, p_blkno);
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);
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);
1042 ocfs2_journal_dirty(handle, bh);
1044 /* Initialize new block with structures */
1045 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1046 &p_blkno, NULL, NULL);
1051 dbh = sb_getblk(sb, p_blkno);
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);
1065 memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1067 ocfs2_journal_dirty(handle, dbh);
1069 /* Update local quotafile info */
1070 oinfo->dqi_blocks += 2;
1071 oinfo->dqi_chunks++;
1072 status = ocfs2_local_write_info(sb, type);
1077 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
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;
1091 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1095 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1096 return ERR_PTR(status);
1099 /* Find free entry in local quota file */
1100 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1101 struct super_block *sb,
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;
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);
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));
1135 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1136 i_size_read(lqinode) + sb->s_blocksize);
1142 /* Get buffer from the just added block */
1143 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1144 &p_blkno, NULL, NULL);
1149 bh = sb_getblk(sb, p_blkno);
1155 ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
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);
1166 /* Zero created block */
1167 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1168 OCFS2_JOURNAL_ACCESS_CREATE);
1174 memset(bh->b_data, 0, sb->s_blocksize);
1176 ocfs2_journal_dirty(handle, bh);
1178 /* Update chunk header */
1179 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1181 OCFS2_JOURNAL_ACCESS_WRITE);
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);
1193 /* Update file header */
1194 oinfo->dqi_blocks++;
1195 status = ocfs2_local_write_info(sb, type);
1201 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1206 *offset = chunk_blocks * epb;
1209 ocfs2_commit_trans(OCFS2_SB(sb), handle);
1211 return ERR_PTR(status);
1214 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1216 int *offset = private;
1217 struct ocfs2_local_disk_chunk *dchunk;
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);
1224 /* Create dquot in the local file for given id */
1225 int ocfs2_create_local_dquot(struct dquot *dquot)
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);
1236 down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1237 chunk = ocfs2_find_free_entry(sb, type, &offset);
1239 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1240 if (IS_ERR(chunk)) {
1241 status = PTR_ERR(chunk);
1244 } else if (IS_ERR(chunk)) {
1245 status = PTR_ERR(chunk);
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,
1256 /* Initialize dquot structure on disk */
1257 status = ocfs2_local_write_dquot(dquot);
1263 /* Mark structure as allocated */
1264 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1271 up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
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
1279 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
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;
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);
1295 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
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);
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,
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