2 * Implementation of operations over global quota file
4 #include <linux/spinlock.h>
6 #include <linux/quota.h>
7 #include <linux/quotaops.h>
8 #include <linux/dqblk_qtree.h>
9 #include <linux/jiffies.h>
10 #include <linux/writeback.h>
11 #include <linux/workqueue.h>
13 #define MLOG_MASK_PREFIX ML_QUOTA
14 #include <cluster/masklog.h>
19 #include "blockcheck.h"
29 static struct workqueue_struct *ocfs2_quota_wq = NULL;
31 static void qsync_work_fn(struct work_struct *work);
33 static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
35 struct ocfs2_global_disk_dqblk *d = dp;
36 struct mem_dqblk *m = &dquot->dq_dqb;
38 /* Update from disk only entries not set by the admin */
39 if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
40 m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
41 m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
43 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
44 m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
45 if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
46 m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
47 m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
49 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
50 m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
51 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
52 m->dqb_btime = le64_to_cpu(d->dqb_btime);
53 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
54 m->dqb_itime = le64_to_cpu(d->dqb_itime);
55 OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
58 static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
60 struct ocfs2_global_disk_dqblk *d = dp;
61 struct mem_dqblk *m = &dquot->dq_dqb;
63 d->dqb_id = cpu_to_le32(dquot->dq_id);
64 d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
65 d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
66 d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
67 d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
68 d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
69 d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
70 d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
71 d->dqb_btime = cpu_to_le64(m->dqb_btime);
72 d->dqb_itime = cpu_to_le64(m->dqb_itime);
73 d->dqb_pad1 = d->dqb_pad2 = 0;
76 static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
78 struct ocfs2_global_disk_dqblk *d = dp;
79 struct ocfs2_mem_dqinfo *oinfo =
80 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
82 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
84 return le32_to_cpu(d->dqb_id) == dquot->dq_id;
87 struct qtree_fmt_operations ocfs2_global_ops = {
88 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
89 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
90 .is_id = ocfs2_global_is_id,
93 static int ocfs2_validate_quota_block(struct super_block *sb,
94 struct buffer_head *bh)
96 struct ocfs2_disk_dqtrailer *dqt =
97 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
99 mlog(0, "Validating quota block %llu\n",
100 (unsigned long long)bh->b_blocknr);
102 BUG_ON(!buffer_uptodate(bh));
105 * If the ecc fails, we return the error but otherwise
106 * leave the filesystem running. We know any error is
107 * local to this block.
109 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
112 int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
113 struct buffer_head **bh)
116 struct buffer_head *tmp = *bh;
118 if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
119 ocfs2_error(inode->i_sb,
120 "Quota file %llu is probably corrupted! Requested "
121 "to read block %Lu but file has size only %Lu\n",
122 (unsigned long long)OCFS2_I(inode)->ip_blkno,
123 (unsigned long long)v_block,
124 (unsigned long long)i_size_read(inode));
127 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
128 ocfs2_validate_quota_block);
132 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
139 static int ocfs2_get_quota_block(struct inode *inode, int block,
140 struct buffer_head **bh)
145 down_read(&OCFS2_I(inode)->ip_alloc_sem);
146 err = ocfs2_extent_map_get_blocks(inode, block, &pblock, &pcount, NULL);
147 up_read(&OCFS2_I(inode)->ip_alloc_sem);
152 *bh = sb_getblk(inode->i_sb, pblock);
160 /* Read data from global quotafile - avoid pagecache and such because we cannot
161 * afford acquiring the locks... We use quota cluster lock to serialize
162 * operations. Caller is responsible for acquiring it. */
163 ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
164 size_t len, loff_t off)
166 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
167 struct inode *gqinode = oinfo->dqi_gqinode;
168 loff_t i_size = i_size_read(gqinode);
169 int offset = off & (sb->s_blocksize - 1);
170 sector_t blk = off >> sb->s_blocksize_bits;
172 struct buffer_head *bh;
173 size_t toread, tocopy;
177 if (off + len > i_size)
181 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
183 err = ocfs2_read_quota_block(gqinode, blk, &bh);
188 memcpy(data, bh->b_data + offset, tocopy);
198 /* Write to quotafile (we know the transaction is already started and has
200 ssize_t ocfs2_quota_write(struct super_block *sb, int type,
201 const char *data, size_t len, loff_t off)
203 struct mem_dqinfo *info = sb_dqinfo(sb, type);
204 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
205 struct inode *gqinode = oinfo->dqi_gqinode;
206 int offset = off & (sb->s_blocksize - 1);
207 sector_t blk = off >> sb->s_blocksize_bits;
208 int err = 0, new = 0, ja_type;
209 struct buffer_head *bh = NULL;
210 handle_t *handle = journal_current_handle();
213 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
214 "because transaction was not started.\n",
215 (unsigned long long)off, (unsigned long long)len);
218 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
220 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
223 mutex_lock_nested(&gqinode->i_mutex, I_MUTEX_QUOTA);
224 if (gqinode->i_size < off + len) {
226 ocfs2_align_bytes_to_blocks(sb, off + len);
228 /* Space is already allocated in ocfs2_global_read_dquot() */
229 err = ocfs2_simple_size_update(gqinode,
236 /* Not rewriting whole block? */
237 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
239 err = ocfs2_read_quota_block(gqinode, blk, &bh);
240 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
242 err = ocfs2_get_quota_block(gqinode, blk, &bh);
243 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
251 memset(bh->b_data, 0, sb->s_blocksize);
252 memcpy(bh->b_data + offset, data, len);
253 flush_dcache_page(bh->b_page);
254 set_buffer_uptodate(bh);
256 ocfs2_set_buffer_uptodate(gqinode, bh);
257 err = ocfs2_journal_access_dq(handle, gqinode, bh, ja_type);
262 err = ocfs2_journal_dirty(handle, bh);
268 mutex_unlock(&gqinode->i_mutex);
272 gqinode->i_version++;
273 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
274 mutex_unlock(&gqinode->i_mutex);
278 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
281 struct buffer_head *bh = NULL;
283 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
286 spin_lock(&dq_data_lock);
287 if (!oinfo->dqi_gqi_count++)
288 oinfo->dqi_gqi_bh = bh;
290 WARN_ON(bh != oinfo->dqi_gqi_bh);
291 spin_unlock(&dq_data_lock);
295 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
297 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
298 brelse(oinfo->dqi_gqi_bh);
299 spin_lock(&dq_data_lock);
300 if (!--oinfo->dqi_gqi_count)
301 oinfo->dqi_gqi_bh = NULL;
302 spin_unlock(&dq_data_lock);
305 /* Read information header from global quota file */
306 int ocfs2_global_read_info(struct super_block *sb, int type)
308 struct inode *gqinode = NULL;
309 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
310 GROUP_QUOTA_SYSTEM_INODE };
311 struct ocfs2_global_disk_dqinfo dinfo;
312 struct mem_dqinfo *info = sb_dqinfo(sb, type);
313 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
318 /* Read global header */
319 gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
322 mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
327 oinfo->dqi_gi.dqi_sb = sb;
328 oinfo->dqi_gi.dqi_type = type;
329 ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
330 oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
331 oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
332 oinfo->dqi_gqi_bh = NULL;
333 oinfo->dqi_gqi_count = 0;
334 oinfo->dqi_gqinode = gqinode;
335 status = ocfs2_lock_global_qf(oinfo, 0);
340 status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
341 sizeof(struct ocfs2_global_disk_dqinfo),
342 OCFS2_GLOBAL_INFO_OFF);
343 ocfs2_unlock_global_qf(oinfo, 0);
344 if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
345 mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
352 info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
353 info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
354 oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
355 oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
356 oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
357 oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
358 oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
359 oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
360 OCFS2_QBLK_RESERVED_SPACE;
361 oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
362 INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
363 queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
364 msecs_to_jiffies(oinfo->dqi_syncms));
371 /* Write information to global quota file. Expects exlusive lock on quota
372 * file inode and quota info */
373 static int __ocfs2_global_write_info(struct super_block *sb, int type)
375 struct mem_dqinfo *info = sb_dqinfo(sb, type);
376 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
377 struct ocfs2_global_disk_dqinfo dinfo;
380 spin_lock(&dq_data_lock);
381 info->dqi_flags &= ~DQF_INFO_DIRTY;
382 dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
383 dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
384 spin_unlock(&dq_data_lock);
385 dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
386 dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
387 dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
388 dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
389 size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
390 sizeof(struct ocfs2_global_disk_dqinfo),
391 OCFS2_GLOBAL_INFO_OFF);
392 if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
393 mlog(ML_ERROR, "Cannot write global quota info structure\n");
401 int ocfs2_global_write_info(struct super_block *sb, int type)
404 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
406 err = ocfs2_qinfo_lock(info, 1);
409 err = __ocfs2_global_write_info(sb, type);
410 ocfs2_qinfo_unlock(info, 1);
414 static int ocfs2_global_qinit_alloc(struct super_block *sb, int type)
416 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
419 * We may need to allocate tree blocks and a leaf block but not the
422 return oinfo->dqi_gi.dqi_qtree_depth;
425 static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type)
427 /* We modify all the allocated blocks, tree root, and info block */
428 return (ocfs2_global_qinit_alloc(sb, type) + 2) *
429 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS;
432 /* Read in information from global quota file and acquire a reference to it.
433 * dquot_acquire() has already started the transaction and locked quota file */
434 int ocfs2_global_read_dquot(struct dquot *dquot)
436 int err, err2, ex = 0;
437 struct super_block *sb = dquot->dq_sb;
438 int type = dquot->dq_type;
439 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
440 struct ocfs2_super *osb = OCFS2_SB(sb);
441 struct inode *gqinode = info->dqi_gqinode;
442 int need_alloc = ocfs2_global_qinit_alloc(sb, type);
443 handle_t *handle = NULL;
445 err = ocfs2_qinfo_lock(info, 0);
448 err = qtree_read_dquot(&info->dqi_gi, dquot);
451 OCFS2_DQUOT(dquot)->dq_use_count++;
452 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
453 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
454 ocfs2_qinfo_unlock(info, 0);
456 if (!dquot->dq_off) { /* No real quota entry? */
459 * Add blocks to quota file before we start a transaction since
460 * locking allocators ranks above a transaction start
462 WARN_ON(journal_current_handle());
463 down_write(&OCFS2_I(gqinode)->ip_alloc_sem);
464 err = ocfs2_extend_no_holes(gqinode,
465 gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
467 up_write(&OCFS2_I(gqinode)->ip_alloc_sem);
472 handle = ocfs2_start_trans(osb,
473 ocfs2_calc_global_qinit_credits(sb, type));
474 if (IS_ERR(handle)) {
475 err = PTR_ERR(handle);
478 err = ocfs2_qinfo_lock(info, ex);
481 err = qtree_write_dquot(&info->dqi_gi, dquot);
482 if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) {
483 err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type);
489 ocfs2_qinfo_unlock(info, 1);
491 ocfs2_qinfo_unlock(info, 0);
494 ocfs2_commit_trans(osb, handle);
501 /* Sync local information about quota modifications with global quota file.
502 * Caller must have started the transaction and obtained exclusive lock for
503 * global quota file inode */
504 int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
507 struct super_block *sb = dquot->dq_sb;
508 int type = dquot->dq_type;
509 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
510 struct ocfs2_global_disk_dqblk dqblk;
511 s64 spacechange, inodechange;
512 time_t olditime, oldbtime;
514 err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
515 sizeof(struct ocfs2_global_disk_dqblk),
517 if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
519 mlog(ML_ERROR, "Short read from global quota file "
526 /* Update space and inode usage. Get also other information from
527 * global quota file so that we don't overwrite any changes there.
529 spin_lock(&dq_data_lock);
530 spacechange = dquot->dq_dqb.dqb_curspace -
531 OCFS2_DQUOT(dquot)->dq_origspace;
532 inodechange = dquot->dq_dqb.dqb_curinodes -
533 OCFS2_DQUOT(dquot)->dq_originodes;
534 olditime = dquot->dq_dqb.dqb_itime;
535 oldbtime = dquot->dq_dqb.dqb_btime;
536 ocfs2_global_disk2memdqb(dquot, &dqblk);
537 mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
538 dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange,
539 dquot->dq_dqb.dqb_curinodes, (long long)inodechange);
540 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
541 dquot->dq_dqb.dqb_curspace += spacechange;
542 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
543 dquot->dq_dqb.dqb_curinodes += inodechange;
544 /* Set properly space grace time... */
545 if (dquot->dq_dqb.dqb_bsoftlimit &&
546 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
547 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
549 if (dquot->dq_dqb.dqb_btime > 0)
550 dquot->dq_dqb.dqb_btime =
551 min(dquot->dq_dqb.dqb_btime, oldbtime);
553 dquot->dq_dqb.dqb_btime = oldbtime;
556 dquot->dq_dqb.dqb_btime = 0;
557 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
559 /* Set properly inode grace time... */
560 if (dquot->dq_dqb.dqb_isoftlimit &&
561 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
562 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
564 if (dquot->dq_dqb.dqb_itime > 0)
565 dquot->dq_dqb.dqb_itime =
566 min(dquot->dq_dqb.dqb_itime, olditime);
568 dquot->dq_dqb.dqb_itime = olditime;
571 dquot->dq_dqb.dqb_itime = 0;
572 clear_bit(DQ_INODES_B, &dquot->dq_flags);
574 /* All information is properly updated, clear the flags */
575 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
576 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
577 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
578 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
579 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
580 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
581 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
582 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
583 spin_unlock(&dq_data_lock);
584 err = ocfs2_qinfo_lock(info, freeing);
586 mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
587 " (type=%d, id=%u)\n", dquot->dq_type,
588 (unsigned)dquot->dq_id);
592 OCFS2_DQUOT(dquot)->dq_use_count--;
593 err = qtree_write_dquot(&info->dqi_gi, dquot);
596 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
597 err = qtree_release_dquot(&info->dqi_gi, dquot);
598 if (info_dirty(sb_dqinfo(sb, type))) {
599 err2 = __ocfs2_global_write_info(sb, type);
605 ocfs2_qinfo_unlock(info, freeing);
613 * Functions for periodic syncing of dquots with global file
615 static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
618 struct super_block *sb = dquot->dq_sb;
619 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
620 struct ocfs2_super *osb = OCFS2_SB(sb);
623 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id,
624 dquot->dq_type, type, sb->s_id);
625 if (type != dquot->dq_type)
627 status = ocfs2_lock_global_qf(oinfo, 1);
631 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
632 if (IS_ERR(handle)) {
633 status = PTR_ERR(handle);
637 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
638 status = ocfs2_sync_dquot(dquot);
639 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
642 /* We have to write local structure as well... */
643 dquot_mark_dquot_dirty(dquot);
644 status = dquot_commit(dquot);
647 ocfs2_commit_trans(osb, handle);
649 ocfs2_unlock_global_qf(oinfo, 1);
655 static void qsync_work_fn(struct work_struct *work)
657 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
658 struct ocfs2_mem_dqinfo,
660 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
662 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
663 queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
664 msecs_to_jiffies(oinfo->dqi_syncms));
668 * Wrappers for generic quota functions
671 static int ocfs2_write_dquot(struct dquot *dquot)
674 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
677 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
679 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
680 if (IS_ERR(handle)) {
681 status = PTR_ERR(handle);
685 status = dquot_commit(dquot);
686 ocfs2_commit_trans(osb, handle);
692 static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
694 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
696 * We modify tree, leaf block, global info, local chunk header,
697 * global and local inode; OCFS2_QINFO_WRITE_CREDITS already
698 * accounts for inode update
700 return (oinfo->dqi_gi.dqi_qtree_depth + 2) *
701 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS +
702 OCFS2_QINFO_WRITE_CREDITS +
703 OCFS2_INODE_UPDATE_CREDITS;
706 static int ocfs2_release_dquot(struct dquot *dquot)
709 struct ocfs2_mem_dqinfo *oinfo =
710 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
711 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
714 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
716 status = ocfs2_lock_global_qf(oinfo, 1);
719 handle = ocfs2_start_trans(osb,
720 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
721 if (IS_ERR(handle)) {
722 status = PTR_ERR(handle);
726 status = dquot_release(dquot);
727 ocfs2_commit_trans(osb, handle);
729 ocfs2_unlock_global_qf(oinfo, 1);
735 static int ocfs2_acquire_dquot(struct dquot *dquot)
737 struct ocfs2_mem_dqinfo *oinfo =
738 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
741 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
742 /* We need an exclusive lock, because we're going to update use count
743 * and instantiate possibly new dquot structure */
744 status = ocfs2_lock_global_qf(oinfo, 1);
747 status = dquot_acquire(dquot);
748 ocfs2_unlock_global_qf(oinfo, 1);
754 static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
756 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
757 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
758 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
759 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
760 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
761 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
764 struct super_block *sb = dquot->dq_sb;
765 int type = dquot->dq_type;
766 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
768 struct ocfs2_super *osb = OCFS2_SB(sb);
770 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
771 dquot_mark_dquot_dirty(dquot);
773 /* In case user set some limits, sync dquot immediately to global
774 * quota file so that information propagates quicker */
775 spin_lock(&dq_data_lock);
776 if (dquot->dq_flags & mask)
778 spin_unlock(&dq_data_lock);
779 /* This is a slight hack but we can't afford getting global quota
780 * lock if we already have a transaction started. */
781 if (!sync || journal_current_handle()) {
782 status = ocfs2_write_dquot(dquot);
785 status = ocfs2_lock_global_qf(oinfo, 1);
788 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
789 if (IS_ERR(handle)) {
790 status = PTR_ERR(handle);
794 status = ocfs2_sync_dquot(dquot);
799 /* Now write updated local dquot structure */
800 status = dquot_commit(dquot);
802 ocfs2_commit_trans(osb, handle);
804 ocfs2_unlock_global_qf(oinfo, 1);
810 /* This should happen only after set_dqinfo(). */
811 static int ocfs2_write_info(struct super_block *sb, int type)
815 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
819 status = ocfs2_lock_global_qf(oinfo, 1);
822 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
823 if (IS_ERR(handle)) {
824 status = PTR_ERR(handle);
828 status = dquot_commit_info(sb, type);
829 ocfs2_commit_trans(OCFS2_SB(sb), handle);
831 ocfs2_unlock_global_qf(oinfo, 1);
837 static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
839 struct ocfs2_dquot *dquot =
840 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
844 return &dquot->dq_dquot;
847 static void ocfs2_destroy_dquot(struct dquot *dquot)
849 kmem_cache_free(ocfs2_dquot_cachep, dquot);
852 struct dquot_operations ocfs2_quota_operations = {
853 .initialize = dquot_initialize,
855 .alloc_space = dquot_alloc_space,
856 .alloc_inode = dquot_alloc_inode,
857 .free_space = dquot_free_space,
858 .free_inode = dquot_free_inode,
859 .transfer = dquot_transfer,
860 .write_dquot = ocfs2_write_dquot,
861 .acquire_dquot = ocfs2_acquire_dquot,
862 .release_dquot = ocfs2_release_dquot,
863 .mark_dirty = ocfs2_mark_dquot_dirty,
864 .write_info = ocfs2_write_info,
865 .alloc_dquot = ocfs2_alloc_dquot,
866 .destroy_dquot = ocfs2_destroy_dquot,
869 int ocfs2_quota_setup(void)
871 ocfs2_quota_wq = create_workqueue("o2quot");
877 void ocfs2_quota_shutdown(void)
879 if (ocfs2_quota_wq) {
880 flush_workqueue(ocfs2_quota_wq);
881 destroy_workqueue(ocfs2_quota_wq);
882 ocfs2_quota_wq = NULL;