2 * Implementation of operations over global quota file
4 #include <linux/spinlock.h>
6 #include <linux/slab.h>
7 #include <linux/quota.h>
8 #include <linux/quotaops.h>
9 #include <linux/dqblk_qtree.h>
10 #include <linux/jiffies.h>
11 #include <linux/writeback.h>
12 #include <linux/workqueue.h>
14 #define MLOG_MASK_PREFIX ML_QUOTA
15 #include <cluster/masklog.h>
20 #include "blockcheck.h"
28 #include "buffer_head_io.h"
32 * Locking of quotas with OCFS2 is rather complex. Here are rules that
33 * should be obeyed by all the functions:
34 * - any write of quota structure (either to local or global file) is protected
35 * by dqio_mutex or dquot->dq_lock.
36 * - any modification of global quota file holds inode cluster lock, i_mutex,
37 * and ip_alloc_sem of the global quota file (achieved by
38 * ocfs2_lock_global_qf). It also has to hold qinfo_lock.
39 * - an allocation of new blocks for local quota file is protected by
42 * A rough sketch of locking dependencies (lf = local file, gf = global file):
43 * Normal filesystem operation:
44 * start_trans -> dqio_mutex -> write to lf
45 * Syncing of local and global file:
46 * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
49 * Acquire dquot for the first time:
50 * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf
51 * -> alloc space for gf
52 * -> start_trans -> qinfo_lock -> write to gf
53 * -> ip_alloc_sem of lf -> alloc space for lf
55 * Release last reference to dquot:
56 * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf
58 * Note that all the above operations also hold the inode cluster lock of lf.
60 * inode cluster lock of recovered lf
61 * -> read bitmaps -> ip_alloc_sem of lf
62 * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
66 static void qsync_work_fn(struct work_struct *work);
68 static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
70 struct ocfs2_global_disk_dqblk *d = dp;
71 struct mem_dqblk *m = &dquot->dq_dqb;
73 /* Update from disk only entries not set by the admin */
74 if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
75 m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
76 m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
78 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
79 m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
80 if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
81 m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
82 m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
84 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
85 m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
86 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
87 m->dqb_btime = le64_to_cpu(d->dqb_btime);
88 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
89 m->dqb_itime = le64_to_cpu(d->dqb_itime);
90 OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
93 static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
95 struct ocfs2_global_disk_dqblk *d = dp;
96 struct mem_dqblk *m = &dquot->dq_dqb;
98 d->dqb_id = cpu_to_le32(dquot->dq_id);
99 d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
100 d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
101 d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
102 d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
103 d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
104 d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
105 d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
106 d->dqb_btime = cpu_to_le64(m->dqb_btime);
107 d->dqb_itime = cpu_to_le64(m->dqb_itime);
108 d->dqb_pad1 = d->dqb_pad2 = 0;
111 static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
113 struct ocfs2_global_disk_dqblk *d = dp;
114 struct ocfs2_mem_dqinfo *oinfo =
115 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
117 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
119 return le32_to_cpu(d->dqb_id) == dquot->dq_id;
122 struct qtree_fmt_operations ocfs2_global_ops = {
123 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
124 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
125 .is_id = ocfs2_global_is_id,
128 int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh)
130 struct ocfs2_disk_dqtrailer *dqt =
131 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
133 mlog(0, "Validating quota block %llu\n",
134 (unsigned long long)bh->b_blocknr);
136 BUG_ON(!buffer_uptodate(bh));
139 * If the ecc fails, we return the error but otherwise
140 * leave the filesystem running. We know any error is
141 * local to this block.
143 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
146 int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
147 struct buffer_head **bhp)
152 rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0,
153 ocfs2_validate_quota_block);
159 /* Read data from global quotafile - avoid pagecache and such because we cannot
160 * afford acquiring the locks... We use quota cluster lock to serialize
161 * operations. Caller is responsible for acquiring it. */
162 ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
163 size_t len, loff_t off)
165 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
166 struct inode *gqinode = oinfo->dqi_gqinode;
167 loff_t i_size = i_size_read(gqinode);
168 int offset = off & (sb->s_blocksize - 1);
169 sector_t blk = off >> sb->s_blocksize_bits;
171 struct buffer_head *bh;
172 size_t toread, tocopy;
173 u64 pblock = 0, pcount = 0;
177 if (off + len > i_size)
181 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
183 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
194 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
199 memcpy(data, bh->b_data + offset, tocopy);
209 /* Write to quotafile (we know the transaction is already started and has
211 ssize_t ocfs2_quota_write(struct super_block *sb, int type,
212 const char *data, size_t len, loff_t off)
214 struct mem_dqinfo *info = sb_dqinfo(sb, type);
215 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
216 struct inode *gqinode = oinfo->dqi_gqinode;
217 int offset = off & (sb->s_blocksize - 1);
218 sector_t blk = off >> sb->s_blocksize_bits;
219 int err = 0, new = 0, ja_type;
220 struct buffer_head *bh = NULL;
221 handle_t *handle = journal_current_handle();
225 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
226 "because transaction was not started.\n",
227 (unsigned long long)off, (unsigned long long)len);
230 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
232 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
235 if (gqinode->i_size < off + len) {
237 ocfs2_align_bytes_to_blocks(sb, off + len);
239 /* Space is already allocated in ocfs2_acquire_dquot() */
240 err = ocfs2_simple_size_update(gqinode,
247 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
252 /* Not rewriting whole block? */
253 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
255 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
256 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
258 bh = sb_getblk(sb, pblock);
261 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
269 memset(bh->b_data, 0, sb->s_blocksize);
270 memcpy(bh->b_data + offset, data, len);
271 flush_dcache_page(bh->b_page);
272 set_buffer_uptodate(bh);
274 ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh);
275 err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh,
281 ocfs2_journal_dirty(handle, bh);
288 gqinode->i_version++;
289 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
293 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
296 struct buffer_head *bh = NULL;
298 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
301 spin_lock(&dq_data_lock);
302 if (!oinfo->dqi_gqi_count++)
303 oinfo->dqi_gqi_bh = bh;
305 WARN_ON(bh != oinfo->dqi_gqi_bh);
306 spin_unlock(&dq_data_lock);
308 mutex_lock(&oinfo->dqi_gqinode->i_mutex);
309 down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
311 down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
316 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
319 up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
320 mutex_unlock(&oinfo->dqi_gqinode->i_mutex);
322 up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
324 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
325 brelse(oinfo->dqi_gqi_bh);
326 spin_lock(&dq_data_lock);
327 if (!--oinfo->dqi_gqi_count)
328 oinfo->dqi_gqi_bh = NULL;
329 spin_unlock(&dq_data_lock);
332 /* Read information header from global quota file */
333 int ocfs2_global_read_info(struct super_block *sb, int type)
335 struct inode *gqinode = NULL;
336 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
337 GROUP_QUOTA_SYSTEM_INODE };
338 struct ocfs2_global_disk_dqinfo dinfo;
339 struct mem_dqinfo *info = sb_dqinfo(sb, type);
340 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
346 /* Read global header */
347 gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
350 mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
355 oinfo->dqi_gi.dqi_sb = sb;
356 oinfo->dqi_gi.dqi_type = type;
357 ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
358 oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
359 oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
360 oinfo->dqi_gqi_bh = NULL;
361 oinfo->dqi_gqi_count = 0;
362 oinfo->dqi_gqinode = gqinode;
363 status = ocfs2_lock_global_qf(oinfo, 0);
369 status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk,
374 status = ocfs2_qinfo_lock(oinfo, 0);
377 status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
378 sizeof(struct ocfs2_global_disk_dqinfo),
379 OCFS2_GLOBAL_INFO_OFF);
380 ocfs2_qinfo_unlock(oinfo, 0);
381 ocfs2_unlock_global_qf(oinfo, 0);
382 if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
383 mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
390 info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
391 info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
392 oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
393 oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
394 oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
395 oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
396 oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
397 oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
398 OCFS2_QBLK_RESERVED_SPACE;
399 oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
400 INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
401 schedule_delayed_work(&oinfo->dqi_sync_work,
402 msecs_to_jiffies(oinfo->dqi_syncms));
408 ocfs2_unlock_global_qf(oinfo, 0);
413 /* Write information to global quota file. Expects exlusive lock on quota
414 * file inode and quota info */
415 static int __ocfs2_global_write_info(struct super_block *sb, int type)
417 struct mem_dqinfo *info = sb_dqinfo(sb, type);
418 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
419 struct ocfs2_global_disk_dqinfo dinfo;
422 spin_lock(&dq_data_lock);
423 info->dqi_flags &= ~DQF_INFO_DIRTY;
424 dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
425 dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
426 spin_unlock(&dq_data_lock);
427 dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
428 dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
429 dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
430 dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
431 size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
432 sizeof(struct ocfs2_global_disk_dqinfo),
433 OCFS2_GLOBAL_INFO_OFF);
434 if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
435 mlog(ML_ERROR, "Cannot write global quota info structure\n");
443 int ocfs2_global_write_info(struct super_block *sb, int type)
446 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
448 err = ocfs2_qinfo_lock(info, 1);
451 err = __ocfs2_global_write_info(sb, type);
452 ocfs2_qinfo_unlock(info, 1);
456 static int ocfs2_global_qinit_alloc(struct super_block *sb, int type)
458 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
461 * We may need to allocate tree blocks and a leaf block but not the
464 return oinfo->dqi_gi.dqi_qtree_depth;
467 static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type)
469 /* We modify all the allocated blocks, tree root, info block and
471 return (ocfs2_global_qinit_alloc(sb, type) + 2) *
472 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1;
475 /* Sync local information about quota modifications with global quota file.
476 * Caller must have started the transaction and obtained exclusive lock for
477 * global quota file inode */
478 int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
481 struct super_block *sb = dquot->dq_sb;
482 int type = dquot->dq_type;
483 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
484 struct ocfs2_global_disk_dqblk dqblk;
485 s64 spacechange, inodechange;
486 time_t olditime, oldbtime;
488 err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
489 sizeof(struct ocfs2_global_disk_dqblk),
491 if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
493 mlog(ML_ERROR, "Short read from global quota file "
500 /* Update space and inode usage. Get also other information from
501 * global quota file so that we don't overwrite any changes there.
503 spin_lock(&dq_data_lock);
504 spacechange = dquot->dq_dqb.dqb_curspace -
505 OCFS2_DQUOT(dquot)->dq_origspace;
506 inodechange = dquot->dq_dqb.dqb_curinodes -
507 OCFS2_DQUOT(dquot)->dq_originodes;
508 olditime = dquot->dq_dqb.dqb_itime;
509 oldbtime = dquot->dq_dqb.dqb_btime;
510 ocfs2_global_disk2memdqb(dquot, &dqblk);
511 mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
512 dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange,
513 dquot->dq_dqb.dqb_curinodes, (long long)inodechange);
514 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
515 dquot->dq_dqb.dqb_curspace += spacechange;
516 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
517 dquot->dq_dqb.dqb_curinodes += inodechange;
518 /* Set properly space grace time... */
519 if (dquot->dq_dqb.dqb_bsoftlimit &&
520 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
521 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
523 if (dquot->dq_dqb.dqb_btime > 0)
524 dquot->dq_dqb.dqb_btime =
525 min(dquot->dq_dqb.dqb_btime, oldbtime);
527 dquot->dq_dqb.dqb_btime = oldbtime;
530 dquot->dq_dqb.dqb_btime = 0;
531 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
533 /* Set properly inode grace time... */
534 if (dquot->dq_dqb.dqb_isoftlimit &&
535 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
536 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
538 if (dquot->dq_dqb.dqb_itime > 0)
539 dquot->dq_dqb.dqb_itime =
540 min(dquot->dq_dqb.dqb_itime, olditime);
542 dquot->dq_dqb.dqb_itime = olditime;
545 dquot->dq_dqb.dqb_itime = 0;
546 clear_bit(DQ_INODES_B, &dquot->dq_flags);
548 /* All information is properly updated, clear the flags */
549 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
550 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
551 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
552 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
553 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
554 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
555 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
556 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
557 spin_unlock(&dq_data_lock);
558 err = ocfs2_qinfo_lock(info, freeing);
560 mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
561 " (type=%d, id=%u)\n", dquot->dq_type,
562 (unsigned)dquot->dq_id);
566 OCFS2_DQUOT(dquot)->dq_use_count--;
567 err = qtree_write_dquot(&info->dqi_gi, dquot);
570 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
571 err = qtree_release_dquot(&info->dqi_gi, dquot);
572 if (info_dirty(sb_dqinfo(sb, type))) {
573 err2 = __ocfs2_global_write_info(sb, type);
579 ocfs2_qinfo_unlock(info, freeing);
587 * Functions for periodic syncing of dquots with global file
589 static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
592 struct super_block *sb = dquot->dq_sb;
593 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
594 struct ocfs2_super *osb = OCFS2_SB(sb);
597 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id,
598 dquot->dq_type, type, sb->s_id);
599 if (type != dquot->dq_type)
601 status = ocfs2_lock_global_qf(oinfo, 1);
605 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
606 if (IS_ERR(handle)) {
607 status = PTR_ERR(handle);
611 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
612 status = ocfs2_sync_dquot(dquot);
615 /* We have to write local structure as well... */
616 status = ocfs2_local_write_dquot(dquot);
619 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
620 ocfs2_commit_trans(osb, handle);
622 ocfs2_unlock_global_qf(oinfo, 1);
628 static void qsync_work_fn(struct work_struct *work)
630 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
631 struct ocfs2_mem_dqinfo,
633 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
635 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
636 schedule_delayed_work(&oinfo->dqi_sync_work,
637 msecs_to_jiffies(oinfo->dqi_syncms));
641 * Wrappers for generic quota functions
644 static int ocfs2_write_dquot(struct dquot *dquot)
647 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
650 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
652 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
653 if (IS_ERR(handle)) {
654 status = PTR_ERR(handle);
658 mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
659 status = ocfs2_local_write_dquot(dquot);
660 mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
661 ocfs2_commit_trans(osb, handle);
667 static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
669 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
671 * We modify tree, leaf block, global info, local chunk header,
672 * global and local inode; OCFS2_QINFO_WRITE_CREDITS already
673 * accounts for inode update
675 return (oinfo->dqi_gi.dqi_qtree_depth + 2) *
676 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS +
677 OCFS2_QINFO_WRITE_CREDITS +
678 OCFS2_INODE_UPDATE_CREDITS;
681 static int ocfs2_release_dquot(struct dquot *dquot)
684 struct ocfs2_mem_dqinfo *oinfo =
685 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
686 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
689 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
691 mutex_lock(&dquot->dq_lock);
692 /* Check whether we are not racing with some other dqget() */
693 if (atomic_read(&dquot->dq_count) > 1)
695 status = ocfs2_lock_global_qf(oinfo, 1);
698 handle = ocfs2_start_trans(osb,
699 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
700 if (IS_ERR(handle)) {
701 status = PTR_ERR(handle);
706 status = ocfs2_global_release_dquot(dquot);
711 status = ocfs2_local_release_dquot(handle, dquot);
713 * If we fail here, we cannot do much as global structure is
714 * already released. So just complain...
718 clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
720 ocfs2_commit_trans(osb, handle);
722 ocfs2_unlock_global_qf(oinfo, 1);
724 mutex_unlock(&dquot->dq_lock);
730 * Read global dquot structure from disk or create it if it does
731 * not exist. Also update use count of the global structure and
732 * create structure in node-local quota file.
734 static int ocfs2_acquire_dquot(struct dquot *dquot)
738 struct super_block *sb = dquot->dq_sb;
739 struct ocfs2_super *osb = OCFS2_SB(sb);
740 int type = dquot->dq_type;
741 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
742 struct inode *gqinode = info->dqi_gqinode;
743 int need_alloc = ocfs2_global_qinit_alloc(sb, type);
746 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
747 mutex_lock(&dquot->dq_lock);
749 * We need an exclusive lock, because we're going to update use count
750 * and instantiate possibly new dquot structure
752 status = ocfs2_lock_global_qf(info, 1);
755 if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
756 status = ocfs2_qinfo_lock(info, 0);
759 status = qtree_read_dquot(&info->dqi_gi, dquot);
760 ocfs2_qinfo_unlock(info, 0);
764 set_bit(DQ_READ_B, &dquot->dq_flags);
766 OCFS2_DQUOT(dquot)->dq_use_count++;
767 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
768 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
769 if (!dquot->dq_off) { /* No real quota entry? */
772 * Add blocks to quota file before we start a transaction since
773 * locking allocators ranks above a transaction start
775 WARN_ON(journal_current_handle());
776 status = ocfs2_extend_no_holes(gqinode, NULL,
777 gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
783 handle = ocfs2_start_trans(osb,
784 ocfs2_calc_global_qinit_credits(sb, type));
785 if (IS_ERR(handle)) {
786 status = PTR_ERR(handle);
789 status = ocfs2_qinfo_lock(info, ex);
792 status = qtree_write_dquot(&info->dqi_gi, dquot);
793 if (ex && info_dirty(sb_dqinfo(sb, type))) {
794 err = __ocfs2_global_write_info(sb, type);
798 ocfs2_qinfo_unlock(info, ex);
800 ocfs2_commit_trans(osb, handle);
802 ocfs2_unlock_global_qf(info, 1);
806 status = ocfs2_create_local_dquot(dquot);
809 set_bit(DQ_ACTIVE_B, &dquot->dq_flags);
811 mutex_unlock(&dquot->dq_lock);
816 static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
818 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
819 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
820 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
821 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
822 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
823 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
826 struct super_block *sb = dquot->dq_sb;
827 int type = dquot->dq_type;
828 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
830 struct ocfs2_super *osb = OCFS2_SB(sb);
832 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
834 /* In case user set some limits, sync dquot immediately to global
835 * quota file so that information propagates quicker */
836 spin_lock(&dq_data_lock);
837 if (dquot->dq_flags & mask)
839 spin_unlock(&dq_data_lock);
840 /* This is a slight hack but we can't afford getting global quota
841 * lock if we already have a transaction started. */
842 if (!sync || journal_current_handle()) {
843 status = ocfs2_write_dquot(dquot);
846 status = ocfs2_lock_global_qf(oinfo, 1);
849 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
850 if (IS_ERR(handle)) {
851 status = PTR_ERR(handle);
855 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
856 status = ocfs2_sync_dquot(dquot);
861 /* Now write updated local dquot structure */
862 status = ocfs2_local_write_dquot(dquot);
864 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
865 ocfs2_commit_trans(osb, handle);
867 ocfs2_unlock_global_qf(oinfo, 1);
873 /* This should happen only after set_dqinfo(). */
874 static int ocfs2_write_info(struct super_block *sb, int type)
878 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
882 status = ocfs2_lock_global_qf(oinfo, 1);
885 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
886 if (IS_ERR(handle)) {
887 status = PTR_ERR(handle);
891 status = dquot_commit_info(sb, type);
892 ocfs2_commit_trans(OCFS2_SB(sb), handle);
894 ocfs2_unlock_global_qf(oinfo, 1);
900 static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
902 struct ocfs2_dquot *dquot =
903 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
907 return &dquot->dq_dquot;
910 static void ocfs2_destroy_dquot(struct dquot *dquot)
912 kmem_cache_free(ocfs2_dquot_cachep, dquot);
915 const struct dquot_operations ocfs2_quota_operations = {
916 /* We never make dquot dirty so .write_dquot is never called */
917 .acquire_dquot = ocfs2_acquire_dquot,
918 .release_dquot = ocfs2_release_dquot,
919 .mark_dirty = ocfs2_mark_dquot_dirty,
920 .write_info = ocfs2_write_info,
921 .alloc_dquot = ocfs2_alloc_dquot,
922 .destroy_dquot = ocfs2_destroy_dquot,