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
#include <cluster/masklog.h>
19
#include "blockcheck.h"
27
#include "buffer_head_io.h"
29
#include "ocfs2_trace.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
trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr);
135
BUG_ON(!buffer_uptodate(bh));
138
* If the ecc fails, we return the error but otherwise
139
* leave the filesystem running. We know any error is
140
* local to this block.
142
return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
145
int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
146
struct buffer_head **bhp)
151
rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0,
152
ocfs2_validate_quota_block);
158
/* Read data from global quotafile - avoid pagecache and such because we cannot
159
* afford acquiring the locks... We use quota cluster lock to serialize
160
* operations. Caller is responsible for acquiring it. */
161
ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
162
size_t len, loff_t off)
164
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
165
struct inode *gqinode = oinfo->dqi_gqinode;
166
loff_t i_size = i_size_read(gqinode);
167
int offset = off & (sb->s_blocksize - 1);
168
sector_t blk = off >> sb->s_blocksize_bits;
170
struct buffer_head *bh;
171
size_t toread, tocopy;
172
u64 pblock = 0, pcount = 0;
176
if (off + len > i_size)
180
tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
182
err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
193
err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
198
memcpy(data, bh->b_data + offset, tocopy);
208
/* Write to quotafile (we know the transaction is already started and has
210
ssize_t ocfs2_quota_write(struct super_block *sb, int type,
211
const char *data, size_t len, loff_t off)
213
struct mem_dqinfo *info = sb_dqinfo(sb, type);
214
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
215
struct inode *gqinode = oinfo->dqi_gqinode;
216
int offset = off & (sb->s_blocksize - 1);
217
sector_t blk = off >> sb->s_blocksize_bits;
218
int err = 0, new = 0, ja_type;
219
struct buffer_head *bh = NULL;
220
handle_t *handle = journal_current_handle();
224
mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
225
"because transaction was not started.\n",
226
(unsigned long long)off, (unsigned long long)len);
229
if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
231
len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
234
if (gqinode->i_size < off + len) {
236
ocfs2_align_bytes_to_blocks(sb, off + len);
238
/* Space is already allocated in ocfs2_acquire_dquot() */
239
err = ocfs2_simple_size_update(gqinode,
246
err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
251
/* Not rewriting whole block? */
252
if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
254
err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
255
ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
257
bh = sb_getblk(sb, pblock);
260
ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
268
memset(bh->b_data, 0, sb->s_blocksize);
269
memcpy(bh->b_data + offset, data, len);
270
flush_dcache_page(bh->b_page);
271
set_buffer_uptodate(bh);
273
ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh);
274
err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh,
280
ocfs2_journal_dirty(handle, bh);
287
gqinode->i_version++;
288
ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
292
int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
295
struct buffer_head *bh = NULL;
297
status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
300
spin_lock(&dq_data_lock);
301
if (!oinfo->dqi_gqi_count++)
302
oinfo->dqi_gqi_bh = bh;
304
WARN_ON(bh != oinfo->dqi_gqi_bh);
305
spin_unlock(&dq_data_lock);
307
mutex_lock(&oinfo->dqi_gqinode->i_mutex);
308
down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
310
down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
315
void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
318
up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
319
mutex_unlock(&oinfo->dqi_gqinode->i_mutex);
321
up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
323
ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
324
brelse(oinfo->dqi_gqi_bh);
325
spin_lock(&dq_data_lock);
326
if (!--oinfo->dqi_gqi_count)
327
oinfo->dqi_gqi_bh = NULL;
328
spin_unlock(&dq_data_lock);
331
/* Read information header from global quota file */
332
int ocfs2_global_read_info(struct super_block *sb, int type)
334
struct inode *gqinode = NULL;
335
unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
336
GROUP_QUOTA_SYSTEM_INODE };
337
struct ocfs2_global_disk_dqinfo dinfo;
338
struct mem_dqinfo *info = sb_dqinfo(sb, type);
339
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
343
/* Read global header */
344
gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
347
mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
352
oinfo->dqi_gi.dqi_sb = sb;
353
oinfo->dqi_gi.dqi_type = type;
354
ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
355
oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
356
oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
357
oinfo->dqi_gqi_bh = NULL;
358
oinfo->dqi_gqi_count = 0;
359
oinfo->dqi_gqinode = gqinode;
360
status = ocfs2_lock_global_qf(oinfo, 0);
366
status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk,
371
status = ocfs2_qinfo_lock(oinfo, 0);
374
status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
375
sizeof(struct ocfs2_global_disk_dqinfo),
376
OCFS2_GLOBAL_INFO_OFF);
377
ocfs2_qinfo_unlock(oinfo, 0);
378
ocfs2_unlock_global_qf(oinfo, 0);
379
if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
380
mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
387
info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
388
info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
389
oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
390
oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
391
oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
392
oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
393
oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
394
oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
395
OCFS2_QBLK_RESERVED_SPACE;
396
oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
397
INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
398
schedule_delayed_work(&oinfo->dqi_sync_work,
399
msecs_to_jiffies(oinfo->dqi_syncms));
406
ocfs2_unlock_global_qf(oinfo, 0);
411
/* Write information to global quota file. Expects exlusive lock on quota
412
* file inode and quota info */
413
static int __ocfs2_global_write_info(struct super_block *sb, int type)
415
struct mem_dqinfo *info = sb_dqinfo(sb, type);
416
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
417
struct ocfs2_global_disk_dqinfo dinfo;
420
spin_lock(&dq_data_lock);
421
info->dqi_flags &= ~DQF_INFO_DIRTY;
422
dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
423
dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
424
spin_unlock(&dq_data_lock);
425
dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
426
dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
427
dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
428
dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
429
size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
430
sizeof(struct ocfs2_global_disk_dqinfo),
431
OCFS2_GLOBAL_INFO_OFF);
432
if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
433
mlog(ML_ERROR, "Cannot write global quota info structure\n");
441
int ocfs2_global_write_info(struct super_block *sb, int type)
444
struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
446
err = ocfs2_qinfo_lock(info, 1);
449
err = __ocfs2_global_write_info(sb, type);
450
ocfs2_qinfo_unlock(info, 1);
454
static int ocfs2_global_qinit_alloc(struct super_block *sb, int type)
456
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
459
* We may need to allocate tree blocks and a leaf block but not the
462
return oinfo->dqi_gi.dqi_qtree_depth;
465
static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type)
467
/* We modify all the allocated blocks, tree root, info block and
469
return (ocfs2_global_qinit_alloc(sb, type) + 2) *
470
OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1;
473
/* Sync local information about quota modifications with global quota file.
474
* Caller must have started the transaction and obtained exclusive lock for
475
* global quota file inode */
476
int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
479
struct super_block *sb = dquot->dq_sb;
480
int type = dquot->dq_type;
481
struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
482
struct ocfs2_global_disk_dqblk dqblk;
483
s64 spacechange, inodechange;
484
time_t olditime, oldbtime;
486
err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
487
sizeof(struct ocfs2_global_disk_dqblk),
489
if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
491
mlog(ML_ERROR, "Short read from global quota file "
498
/* Update space and inode usage. Get also other information from
499
* global quota file so that we don't overwrite any changes there.
501
spin_lock(&dq_data_lock);
502
spacechange = dquot->dq_dqb.dqb_curspace -
503
OCFS2_DQUOT(dquot)->dq_origspace;
504
inodechange = dquot->dq_dqb.dqb_curinodes -
505
OCFS2_DQUOT(dquot)->dq_originodes;
506
olditime = dquot->dq_dqb.dqb_itime;
507
oldbtime = dquot->dq_dqb.dqb_btime;
508
ocfs2_global_disk2memdqb(dquot, &dqblk);
509
trace_ocfs2_sync_dquot(dquot->dq_id, dquot->dq_dqb.dqb_curspace,
510
(long long)spacechange,
511
dquot->dq_dqb.dqb_curinodes,
512
(long long)inodechange);
513
if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
514
dquot->dq_dqb.dqb_curspace += spacechange;
515
if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
516
dquot->dq_dqb.dqb_curinodes += inodechange;
517
/* Set properly space grace time... */
518
if (dquot->dq_dqb.dqb_bsoftlimit &&
519
dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
520
if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
522
if (dquot->dq_dqb.dqb_btime > 0)
523
dquot->dq_dqb.dqb_btime =
524
min(dquot->dq_dqb.dqb_btime, oldbtime);
526
dquot->dq_dqb.dqb_btime = oldbtime;
529
dquot->dq_dqb.dqb_btime = 0;
530
clear_bit(DQ_BLKS_B, &dquot->dq_flags);
532
/* Set properly inode grace time... */
533
if (dquot->dq_dqb.dqb_isoftlimit &&
534
dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
535
if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
537
if (dquot->dq_dqb.dqb_itime > 0)
538
dquot->dq_dqb.dqb_itime =
539
min(dquot->dq_dqb.dqb_itime, olditime);
541
dquot->dq_dqb.dqb_itime = olditime;
544
dquot->dq_dqb.dqb_itime = 0;
545
clear_bit(DQ_INODES_B, &dquot->dq_flags);
547
/* All information is properly updated, clear the flags */
548
__clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
549
__clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
550
__clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
551
__clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
552
__clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
553
__clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
554
OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
555
OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
556
spin_unlock(&dq_data_lock);
557
err = ocfs2_qinfo_lock(info, freeing);
559
mlog(ML_ERROR, "Failed to lock quota info, losing quota write"
560
" (type=%d, id=%u)\n", dquot->dq_type,
561
(unsigned)dquot->dq_id);
565
OCFS2_DQUOT(dquot)->dq_use_count--;
566
err = qtree_write_dquot(&info->dqi_gi, dquot);
569
if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
570
err = qtree_release_dquot(&info->dqi_gi, dquot);
571
if (info_dirty(sb_dqinfo(sb, type))) {
572
err2 = __ocfs2_global_write_info(sb, type);
578
ocfs2_qinfo_unlock(info, freeing);
586
* Functions for periodic syncing of dquots with global file
588
static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
591
struct super_block *sb = dquot->dq_sb;
592
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
593
struct ocfs2_super *osb = OCFS2_SB(sb);
596
trace_ocfs2_sync_dquot_helper(dquot->dq_id, dquot->dq_type,
598
if (type != dquot->dq_type)
600
status = ocfs2_lock_global_qf(oinfo, 1);
604
handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
605
if (IS_ERR(handle)) {
606
status = PTR_ERR(handle);
610
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
611
status = ocfs2_sync_dquot(dquot);
614
/* We have to write local structure as well... */
615
status = ocfs2_local_write_dquot(dquot);
618
mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
619
ocfs2_commit_trans(osb, handle);
621
ocfs2_unlock_global_qf(oinfo, 1);
626
static void qsync_work_fn(struct work_struct *work)
628
struct ocfs2_mem_dqinfo *oinfo = container_of(work,
629
struct ocfs2_mem_dqinfo,
631
struct super_block *sb = oinfo->dqi_gqinode->i_sb;
633
dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
634
schedule_delayed_work(&oinfo->dqi_sync_work,
635
msecs_to_jiffies(oinfo->dqi_syncms));
639
* Wrappers for generic quota functions
642
static int ocfs2_write_dquot(struct dquot *dquot)
645
struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
648
trace_ocfs2_write_dquot(dquot->dq_id, dquot->dq_type);
650
handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
651
if (IS_ERR(handle)) {
652
status = PTR_ERR(handle);
656
mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
657
status = ocfs2_local_write_dquot(dquot);
658
mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
659
ocfs2_commit_trans(osb, handle);
664
static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
666
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
668
* We modify tree, leaf block, global info, local chunk header,
669
* global and local inode; OCFS2_QINFO_WRITE_CREDITS already
670
* accounts for inode update
672
return (oinfo->dqi_gi.dqi_qtree_depth + 2) *
673
OCFS2_QUOTA_BLOCK_UPDATE_CREDITS +
674
OCFS2_QINFO_WRITE_CREDITS +
675
OCFS2_INODE_UPDATE_CREDITS;
678
static int ocfs2_release_dquot(struct dquot *dquot)
681
struct ocfs2_mem_dqinfo *oinfo =
682
sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
683
struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
686
trace_ocfs2_release_dquot(dquot->dq_id, dquot->dq_type);
688
mutex_lock(&dquot->dq_lock);
689
/* Check whether we are not racing with some other dqget() */
690
if (atomic_read(&dquot->dq_count) > 1)
692
status = ocfs2_lock_global_qf(oinfo, 1);
695
handle = ocfs2_start_trans(osb,
696
ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
697
if (IS_ERR(handle)) {
698
status = PTR_ERR(handle);
703
status = ocfs2_global_release_dquot(dquot);
708
status = ocfs2_local_release_dquot(handle, dquot);
710
* If we fail here, we cannot do much as global structure is
711
* already released. So just complain...
715
clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
717
ocfs2_commit_trans(osb, handle);
719
ocfs2_unlock_global_qf(oinfo, 1);
721
mutex_unlock(&dquot->dq_lock);
728
* Read global dquot structure from disk or create it if it does
729
* not exist. Also update use count of the global structure and
730
* create structure in node-local quota file.
732
static int ocfs2_acquire_dquot(struct dquot *dquot)
736
struct super_block *sb = dquot->dq_sb;
737
struct ocfs2_super *osb = OCFS2_SB(sb);
738
int type = dquot->dq_type;
739
struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
740
struct inode *gqinode = info->dqi_gqinode;
741
int need_alloc = ocfs2_global_qinit_alloc(sb, type);
744
trace_ocfs2_acquire_dquot(dquot->dq_id, type);
745
mutex_lock(&dquot->dq_lock);
747
* We need an exclusive lock, because we're going to update use count
748
* and instantiate possibly new dquot structure
750
status = ocfs2_lock_global_qf(info, 1);
753
if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
754
status = ocfs2_qinfo_lock(info, 0);
757
status = qtree_read_dquot(&info->dqi_gi, dquot);
758
ocfs2_qinfo_unlock(info, 0);
762
set_bit(DQ_READ_B, &dquot->dq_flags);
764
OCFS2_DQUOT(dquot)->dq_use_count++;
765
OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
766
OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
767
if (!dquot->dq_off) { /* No real quota entry? */
770
* Add blocks to quota file before we start a transaction since
771
* locking allocators ranks above a transaction start
773
WARN_ON(journal_current_handle());
774
status = ocfs2_extend_no_holes(gqinode, NULL,
775
gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
781
handle = ocfs2_start_trans(osb,
782
ocfs2_calc_global_qinit_credits(sb, type));
783
if (IS_ERR(handle)) {
784
status = PTR_ERR(handle);
787
status = ocfs2_qinfo_lock(info, ex);
790
status = qtree_write_dquot(&info->dqi_gi, dquot);
791
if (ex && info_dirty(sb_dqinfo(sb, type))) {
792
err = __ocfs2_global_write_info(sb, type);
796
ocfs2_qinfo_unlock(info, ex);
798
ocfs2_commit_trans(osb, handle);
800
ocfs2_unlock_global_qf(info, 1);
804
status = ocfs2_create_local_dquot(dquot);
807
set_bit(DQ_ACTIVE_B, &dquot->dq_flags);
809
mutex_unlock(&dquot->dq_lock);
815
static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
817
unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
818
(1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
819
(1 << (DQ_LASTSET_B + QIF_INODES_B)) |
820
(1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
821
(1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
822
(1 << (DQ_LASTSET_B + QIF_ITIME_B));
825
struct super_block *sb = dquot->dq_sb;
826
int type = dquot->dq_type;
827
struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
829
struct ocfs2_super *osb = OCFS2_SB(sb);
831
trace_ocfs2_mark_dquot_dirty(dquot->dq_id, type);
833
/* In case user set some limits, sync dquot immediately to global
834
* quota file so that information propagates quicker */
835
spin_lock(&dq_data_lock);
836
if (dquot->dq_flags & mask)
838
spin_unlock(&dq_data_lock);
839
/* This is a slight hack but we can't afford getting global quota
840
* lock if we already have a transaction started. */
841
if (!sync || journal_current_handle()) {
842
status = ocfs2_write_dquot(dquot);
845
status = ocfs2_lock_global_qf(oinfo, 1);
848
handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
849
if (IS_ERR(handle)) {
850
status = PTR_ERR(handle);
854
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
855
status = ocfs2_sync_dquot(dquot);
860
/* Now write updated local dquot structure */
861
status = ocfs2_local_write_dquot(dquot);
863
mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
864
ocfs2_commit_trans(osb, handle);
866
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;
880
status = ocfs2_lock_global_qf(oinfo, 1);
883
handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
884
if (IS_ERR(handle)) {
885
status = PTR_ERR(handle);
889
status = dquot_commit_info(sb, type);
890
ocfs2_commit_trans(OCFS2_SB(sb), handle);
892
ocfs2_unlock_global_qf(oinfo, 1);
899
static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
901
struct ocfs2_dquot *dquot =
902
kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
906
return &dquot->dq_dquot;
909
static void ocfs2_destroy_dquot(struct dquot *dquot)
911
kmem_cache_free(ocfs2_dquot_cachep, dquot);
914
const struct dquot_operations ocfs2_quota_operations = {
915
/* We never make dquot dirty so .write_dquot is never called */
916
.acquire_dquot = ocfs2_acquire_dquot,
917
.release_dquot = ocfs2_release_dquot,
918
.mark_dirty = ocfs2_mark_dquot_dirty,
919
.write_info = ocfs2_write_info,
920
.alloc_dquot = ocfs2_alloc_dquot,
921
.destroy_dquot = ocfs2_destroy_dquot,