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>
27 static struct workqueue_struct
*ocfs2_quota_wq
= NULL
;
29 static void qsync_work_fn(struct work_struct
*work
);
31 static void ocfs2_global_disk2memdqb(struct dquot
*dquot
, void *dp
)
33 struct ocfs2_global_disk_dqblk
*d
= dp
;
34 struct mem_dqblk
*m
= &dquot
->dq_dqb
;
36 /* Update from disk only entries not set by the admin */
37 if (!test_bit(DQ_LASTSET_B
+ QIF_ILIMITS_B
, &dquot
->dq_flags
)) {
38 m
->dqb_ihardlimit
= le64_to_cpu(d
->dqb_ihardlimit
);
39 m
->dqb_isoftlimit
= le64_to_cpu(d
->dqb_isoftlimit
);
41 if (!test_bit(DQ_LASTSET_B
+ QIF_INODES_B
, &dquot
->dq_flags
))
42 m
->dqb_curinodes
= le64_to_cpu(d
->dqb_curinodes
);
43 if (!test_bit(DQ_LASTSET_B
+ QIF_BLIMITS_B
, &dquot
->dq_flags
)) {
44 m
->dqb_bhardlimit
= le64_to_cpu(d
->dqb_bhardlimit
);
45 m
->dqb_bsoftlimit
= le64_to_cpu(d
->dqb_bsoftlimit
);
47 if (!test_bit(DQ_LASTSET_B
+ QIF_SPACE_B
, &dquot
->dq_flags
))
48 m
->dqb_curspace
= le64_to_cpu(d
->dqb_curspace
);
49 if (!test_bit(DQ_LASTSET_B
+ QIF_BTIME_B
, &dquot
->dq_flags
))
50 m
->dqb_btime
= le64_to_cpu(d
->dqb_btime
);
51 if (!test_bit(DQ_LASTSET_B
+ QIF_ITIME_B
, &dquot
->dq_flags
))
52 m
->dqb_itime
= le64_to_cpu(d
->dqb_itime
);
53 OCFS2_DQUOT(dquot
)->dq_use_count
= le32_to_cpu(d
->dqb_use_count
);
56 static void ocfs2_global_mem2diskdqb(void *dp
, struct dquot
*dquot
)
58 struct ocfs2_global_disk_dqblk
*d
= dp
;
59 struct mem_dqblk
*m
= &dquot
->dq_dqb
;
61 d
->dqb_id
= cpu_to_le32(dquot
->dq_id
);
62 d
->dqb_use_count
= cpu_to_le32(OCFS2_DQUOT(dquot
)->dq_use_count
);
63 d
->dqb_ihardlimit
= cpu_to_le64(m
->dqb_ihardlimit
);
64 d
->dqb_isoftlimit
= cpu_to_le64(m
->dqb_isoftlimit
);
65 d
->dqb_curinodes
= cpu_to_le64(m
->dqb_curinodes
);
66 d
->dqb_bhardlimit
= cpu_to_le64(m
->dqb_bhardlimit
);
67 d
->dqb_bsoftlimit
= cpu_to_le64(m
->dqb_bsoftlimit
);
68 d
->dqb_curspace
= cpu_to_le64(m
->dqb_curspace
);
69 d
->dqb_btime
= cpu_to_le64(m
->dqb_btime
);
70 d
->dqb_itime
= cpu_to_le64(m
->dqb_itime
);
73 static int ocfs2_global_is_id(void *dp
, struct dquot
*dquot
)
75 struct ocfs2_global_disk_dqblk
*d
= dp
;
76 struct ocfs2_mem_dqinfo
*oinfo
=
77 sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
)->dqi_priv
;
79 if (qtree_entry_unused(&oinfo
->dqi_gi
, dp
))
81 return le32_to_cpu(d
->dqb_id
) == dquot
->dq_id
;
84 struct qtree_fmt_operations ocfs2_global_ops
= {
85 .mem2disk_dqblk
= ocfs2_global_mem2diskdqb
,
86 .disk2mem_dqblk
= ocfs2_global_disk2memdqb
,
87 .is_id
= ocfs2_global_is_id
,
90 int ocfs2_read_quota_block(struct inode
*inode
, u64 v_block
,
91 struct buffer_head
**bh
)
94 struct buffer_head
*tmp
= *bh
;
96 rc
= ocfs2_read_virt_blocks(inode
, v_block
, 1, &tmp
, 0, NULL
);
100 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
107 static int ocfs2_get_quota_block(struct inode
*inode
, int block
,
108 struct buffer_head
**bh
)
113 down_read(&OCFS2_I(inode
)->ip_alloc_sem
);
114 err
= ocfs2_extent_map_get_blocks(inode
, block
, &pblock
, &pcount
, NULL
);
115 up_read(&OCFS2_I(inode
)->ip_alloc_sem
);
120 *bh
= sb_getblk(inode
->i_sb
, pblock
);
128 /* Read data from global quotafile - avoid pagecache and such because we cannot
129 * afford acquiring the locks... We use quota cluster lock to serialize
130 * operations. Caller is responsible for acquiring it. */
131 ssize_t
ocfs2_quota_read(struct super_block
*sb
, int type
, char *data
,
132 size_t len
, loff_t off
)
134 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
135 struct inode
*gqinode
= oinfo
->dqi_gqinode
;
136 loff_t i_size
= i_size_read(gqinode
);
137 int offset
= off
& (sb
->s_blocksize
- 1);
138 sector_t blk
= off
>> sb
->s_blocksize_bits
;
140 struct buffer_head
*bh
;
141 size_t toread
, tocopy
;
145 if (off
+ len
> i_size
)
149 tocopy
= min((size_t)(sb
->s_blocksize
- offset
), toread
);
151 err
= ocfs2_read_quota_block(gqinode
, blk
, &bh
);
156 memcpy(data
, bh
->b_data
+ offset
, tocopy
);
166 /* Write to quotafile (we know the transaction is already started and has
168 ssize_t
ocfs2_quota_write(struct super_block
*sb
, int type
,
169 const char *data
, size_t len
, loff_t off
)
171 struct mem_dqinfo
*info
= sb_dqinfo(sb
, type
);
172 struct ocfs2_mem_dqinfo
*oinfo
= info
->dqi_priv
;
173 struct inode
*gqinode
= oinfo
->dqi_gqinode
;
174 int offset
= off
& (sb
->s_blocksize
- 1);
175 sector_t blk
= off
>> sb
->s_blocksize_bits
;
176 int err
= 0, new = 0, ja_type
;
177 struct buffer_head
*bh
= NULL
;
178 handle_t
*handle
= journal_current_handle();
181 mlog(ML_ERROR
, "Quota write (off=%llu, len=%llu) cancelled "
182 "because transaction was not started.\n",
183 (unsigned long long)off
, (unsigned long long)len
);
186 if (len
> sb
->s_blocksize
- OCFS2_QBLK_RESERVED_SPACE
- offset
) {
188 len
= sb
->s_blocksize
- OCFS2_QBLK_RESERVED_SPACE
- offset
;
191 mutex_lock_nested(&gqinode
->i_mutex
, I_MUTEX_QUOTA
);
192 if (gqinode
->i_size
< off
+ len
) {
193 down_write(&OCFS2_I(gqinode
)->ip_alloc_sem
);
194 err
= ocfs2_extend_no_holes(gqinode
, off
+ len
, off
);
195 up_write(&OCFS2_I(gqinode
)->ip_alloc_sem
);
198 err
= ocfs2_simple_size_update(gqinode
,
205 /* Not rewriting whole block? */
206 if ((offset
|| len
< sb
->s_blocksize
- OCFS2_QBLK_RESERVED_SPACE
) &&
208 err
= ocfs2_read_quota_block(gqinode
, blk
, &bh
);
209 ja_type
= OCFS2_JOURNAL_ACCESS_WRITE
;
211 err
= ocfs2_get_quota_block(gqinode
, blk
, &bh
);
212 ja_type
= OCFS2_JOURNAL_ACCESS_CREATE
;
220 memset(bh
->b_data
, 0, sb
->s_blocksize
);
221 memcpy(bh
->b_data
+ offset
, data
, len
);
222 flush_dcache_page(bh
->b_page
);
223 set_buffer_uptodate(bh
);
225 ocfs2_set_buffer_uptodate(gqinode
, bh
);
226 err
= ocfs2_journal_access(handle
, gqinode
, bh
, ja_type
);
231 err
= ocfs2_journal_dirty(handle
, bh
);
237 mutex_unlock(&gqinode
->i_mutex
);
241 gqinode
->i_version
++;
242 ocfs2_mark_inode_dirty(handle
, gqinode
, oinfo
->dqi_gqi_bh
);
243 mutex_unlock(&gqinode
->i_mutex
);
247 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo
*oinfo
, int ex
)
250 struct buffer_head
*bh
= NULL
;
252 status
= ocfs2_inode_lock(oinfo
->dqi_gqinode
, &bh
, ex
);
255 spin_lock(&dq_data_lock
);
256 if (!oinfo
->dqi_gqi_count
++)
257 oinfo
->dqi_gqi_bh
= bh
;
259 WARN_ON(bh
!= oinfo
->dqi_gqi_bh
);
260 spin_unlock(&dq_data_lock
);
264 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo
*oinfo
, int ex
)
266 ocfs2_inode_unlock(oinfo
->dqi_gqinode
, ex
);
267 brelse(oinfo
->dqi_gqi_bh
);
268 spin_lock(&dq_data_lock
);
269 if (!--oinfo
->dqi_gqi_count
)
270 oinfo
->dqi_gqi_bh
= NULL
;
271 spin_unlock(&dq_data_lock
);
274 /* Read information header from global quota file */
275 int ocfs2_global_read_info(struct super_block
*sb
, int type
)
277 struct inode
*gqinode
= NULL
;
278 unsigned int ino
[MAXQUOTAS
] = { USER_QUOTA_SYSTEM_INODE
,
279 GROUP_QUOTA_SYSTEM_INODE
};
280 struct ocfs2_global_disk_dqinfo dinfo
;
281 struct mem_dqinfo
*info
= sb_dqinfo(sb
, type
);
282 struct ocfs2_mem_dqinfo
*oinfo
= info
->dqi_priv
;
287 /* Read global header */
288 gqinode
= ocfs2_get_system_file_inode(OCFS2_SB(sb
), ino
[type
],
291 mlog(ML_ERROR
, "failed to get global quota inode (type=%d)\n",
296 oinfo
->dqi_gi
.dqi_sb
= sb
;
297 oinfo
->dqi_gi
.dqi_type
= type
;
298 ocfs2_qinfo_lock_res_init(&oinfo
->dqi_gqlock
, oinfo
);
299 oinfo
->dqi_gi
.dqi_entry_size
= sizeof(struct ocfs2_global_disk_dqblk
);
300 oinfo
->dqi_gi
.dqi_ops
= &ocfs2_global_ops
;
301 oinfo
->dqi_gqi_bh
= NULL
;
302 oinfo
->dqi_gqi_count
= 0;
303 oinfo
->dqi_gqinode
= gqinode
;
304 status
= ocfs2_lock_global_qf(oinfo
, 0);
309 status
= sb
->s_op
->quota_read(sb
, type
, (char *)&dinfo
,
310 sizeof(struct ocfs2_global_disk_dqinfo
),
311 OCFS2_GLOBAL_INFO_OFF
);
312 ocfs2_unlock_global_qf(oinfo
, 0);
313 if (status
!= sizeof(struct ocfs2_global_disk_dqinfo
)) {
314 mlog(ML_ERROR
, "Cannot read global quota info (%d).\n",
321 info
->dqi_bgrace
= le32_to_cpu(dinfo
.dqi_bgrace
);
322 info
->dqi_igrace
= le32_to_cpu(dinfo
.dqi_igrace
);
323 oinfo
->dqi_syncms
= le32_to_cpu(dinfo
.dqi_syncms
);
324 oinfo
->dqi_syncjiff
= msecs_to_jiffies(oinfo
->dqi_syncms
);
325 oinfo
->dqi_gi
.dqi_blocks
= le32_to_cpu(dinfo
.dqi_blocks
);
326 oinfo
->dqi_gi
.dqi_free_blk
= le32_to_cpu(dinfo
.dqi_free_blk
);
327 oinfo
->dqi_gi
.dqi_free_entry
= le32_to_cpu(dinfo
.dqi_free_entry
);
328 oinfo
->dqi_gi
.dqi_blocksize_bits
= sb
->s_blocksize_bits
;
329 oinfo
->dqi_gi
.dqi_usable_bs
= sb
->s_blocksize
-
330 OCFS2_QBLK_RESERVED_SPACE
;
331 oinfo
->dqi_gi
.dqi_qtree_depth
= qtree_depth(&oinfo
->dqi_gi
);
332 INIT_DELAYED_WORK(&oinfo
->dqi_sync_work
, qsync_work_fn
);
333 queue_delayed_work(ocfs2_quota_wq
, &oinfo
->dqi_sync_work
,
334 oinfo
->dqi_syncjiff
);
341 /* Write information to global quota file. Expects exlusive lock on quota
342 * file inode and quota info */
343 static int __ocfs2_global_write_info(struct super_block
*sb
, int type
)
345 struct mem_dqinfo
*info
= sb_dqinfo(sb
, type
);
346 struct ocfs2_mem_dqinfo
*oinfo
= info
->dqi_priv
;
347 struct ocfs2_global_disk_dqinfo dinfo
;
350 spin_lock(&dq_data_lock
);
351 info
->dqi_flags
&= ~DQF_INFO_DIRTY
;
352 dinfo
.dqi_bgrace
= cpu_to_le32(info
->dqi_bgrace
);
353 dinfo
.dqi_igrace
= cpu_to_le32(info
->dqi_igrace
);
354 spin_unlock(&dq_data_lock
);
355 dinfo
.dqi_syncms
= cpu_to_le32(oinfo
->dqi_syncms
);
356 dinfo
.dqi_blocks
= cpu_to_le32(oinfo
->dqi_gi
.dqi_blocks
);
357 dinfo
.dqi_free_blk
= cpu_to_le32(oinfo
->dqi_gi
.dqi_free_blk
);
358 dinfo
.dqi_free_entry
= cpu_to_le32(oinfo
->dqi_gi
.dqi_free_entry
);
359 size
= sb
->s_op
->quota_write(sb
, type
, (char *)&dinfo
,
360 sizeof(struct ocfs2_global_disk_dqinfo
),
361 OCFS2_GLOBAL_INFO_OFF
);
362 if (size
!= sizeof(struct ocfs2_global_disk_dqinfo
)) {
363 mlog(ML_ERROR
, "Cannot write global quota info structure\n");
371 int ocfs2_global_write_info(struct super_block
*sb
, int type
)
374 struct ocfs2_mem_dqinfo
*info
= sb_dqinfo(sb
, type
)->dqi_priv
;
376 err
= ocfs2_qinfo_lock(info
, 1);
379 err
= __ocfs2_global_write_info(sb
, type
);
380 ocfs2_qinfo_unlock(info
, 1);
384 /* Read in information from global quota file and acquire a reference to it.
385 * dquot_acquire() has already started the transaction and locked quota file */
386 int ocfs2_global_read_dquot(struct dquot
*dquot
)
388 int err
, err2
, ex
= 0;
389 struct ocfs2_mem_dqinfo
*info
=
390 sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
)->dqi_priv
;
392 err
= ocfs2_qinfo_lock(info
, 0);
395 err
= qtree_read_dquot(&info
->dqi_gi
, dquot
);
398 OCFS2_DQUOT(dquot
)->dq_use_count
++;
399 OCFS2_DQUOT(dquot
)->dq_origspace
= dquot
->dq_dqb
.dqb_curspace
;
400 OCFS2_DQUOT(dquot
)->dq_originodes
= dquot
->dq_dqb
.dqb_curinodes
;
401 if (!dquot
->dq_off
) { /* No real quota entry? */
402 /* Upgrade to exclusive lock for allocation */
403 err
= ocfs2_qinfo_lock(info
, 1);
408 err
= qtree_write_dquot(&info
->dqi_gi
, dquot
);
409 if (ex
&& info_dirty(sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
))) {
410 err2
= __ocfs2_global_write_info(dquot
->dq_sb
, dquot
->dq_type
);
416 ocfs2_qinfo_unlock(info
, 1);
417 ocfs2_qinfo_unlock(info
, 0);
424 /* Sync local information about quota modifications with global quota file.
425 * Caller must have started the transaction and obtained exclusive lock for
426 * global quota file inode */
427 int __ocfs2_sync_dquot(struct dquot
*dquot
, int freeing
)
430 struct super_block
*sb
= dquot
->dq_sb
;
431 int type
= dquot
->dq_type
;
432 struct ocfs2_mem_dqinfo
*info
= sb_dqinfo(sb
, type
)->dqi_priv
;
433 struct ocfs2_global_disk_dqblk dqblk
;
434 s64 spacechange
, inodechange
;
435 time_t olditime
, oldbtime
;
437 err
= sb
->s_op
->quota_read(sb
, type
, (char *)&dqblk
,
438 sizeof(struct ocfs2_global_disk_dqblk
),
440 if (err
!= sizeof(struct ocfs2_global_disk_dqblk
)) {
442 mlog(ML_ERROR
, "Short read from global quota file "
449 /* Update space and inode usage. Get also other information from
450 * global quota file so that we don't overwrite any changes there.
452 spin_lock(&dq_data_lock
);
453 spacechange
= dquot
->dq_dqb
.dqb_curspace
-
454 OCFS2_DQUOT(dquot
)->dq_origspace
;
455 inodechange
= dquot
->dq_dqb
.dqb_curinodes
-
456 OCFS2_DQUOT(dquot
)->dq_originodes
;
457 olditime
= dquot
->dq_dqb
.dqb_itime
;
458 oldbtime
= dquot
->dq_dqb
.dqb_btime
;
459 ocfs2_global_disk2memdqb(dquot
, &dqblk
);
460 mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
461 dquot
->dq_id
, dquot
->dq_dqb
.dqb_curspace
, (long long)spacechange
,
462 dquot
->dq_dqb
.dqb_curinodes
, (long long)inodechange
);
463 if (!test_bit(DQ_LASTSET_B
+ QIF_SPACE_B
, &dquot
->dq_flags
))
464 dquot
->dq_dqb
.dqb_curspace
+= spacechange
;
465 if (!test_bit(DQ_LASTSET_B
+ QIF_INODES_B
, &dquot
->dq_flags
))
466 dquot
->dq_dqb
.dqb_curinodes
+= inodechange
;
467 /* Set properly space grace time... */
468 if (dquot
->dq_dqb
.dqb_bsoftlimit
&&
469 dquot
->dq_dqb
.dqb_curspace
> dquot
->dq_dqb
.dqb_bsoftlimit
) {
470 if (!test_bit(DQ_LASTSET_B
+ QIF_BTIME_B
, &dquot
->dq_flags
) &&
472 if (dquot
->dq_dqb
.dqb_btime
> 0)
473 dquot
->dq_dqb
.dqb_btime
=
474 min(dquot
->dq_dqb
.dqb_btime
, oldbtime
);
476 dquot
->dq_dqb
.dqb_btime
= oldbtime
;
479 dquot
->dq_dqb
.dqb_btime
= 0;
480 clear_bit(DQ_BLKS_B
, &dquot
->dq_flags
);
482 /* Set properly inode grace time... */
483 if (dquot
->dq_dqb
.dqb_isoftlimit
&&
484 dquot
->dq_dqb
.dqb_curinodes
> dquot
->dq_dqb
.dqb_isoftlimit
) {
485 if (!test_bit(DQ_LASTSET_B
+ QIF_ITIME_B
, &dquot
->dq_flags
) &&
487 if (dquot
->dq_dqb
.dqb_itime
> 0)
488 dquot
->dq_dqb
.dqb_itime
=
489 min(dquot
->dq_dqb
.dqb_itime
, olditime
);
491 dquot
->dq_dqb
.dqb_itime
= olditime
;
494 dquot
->dq_dqb
.dqb_itime
= 0;
495 clear_bit(DQ_INODES_B
, &dquot
->dq_flags
);
497 /* All information is properly updated, clear the flags */
498 __clear_bit(DQ_LASTSET_B
+ QIF_SPACE_B
, &dquot
->dq_flags
);
499 __clear_bit(DQ_LASTSET_B
+ QIF_INODES_B
, &dquot
->dq_flags
);
500 __clear_bit(DQ_LASTSET_B
+ QIF_BLIMITS_B
, &dquot
->dq_flags
);
501 __clear_bit(DQ_LASTSET_B
+ QIF_ILIMITS_B
, &dquot
->dq_flags
);
502 __clear_bit(DQ_LASTSET_B
+ QIF_BTIME_B
, &dquot
->dq_flags
);
503 __clear_bit(DQ_LASTSET_B
+ QIF_ITIME_B
, &dquot
->dq_flags
);
504 OCFS2_DQUOT(dquot
)->dq_origspace
= dquot
->dq_dqb
.dqb_curspace
;
505 OCFS2_DQUOT(dquot
)->dq_originodes
= dquot
->dq_dqb
.dqb_curinodes
;
506 spin_unlock(&dq_data_lock
);
507 err
= ocfs2_qinfo_lock(info
, freeing
);
509 mlog(ML_ERROR
, "Failed to lock quota info, loosing quota write"
510 " (type=%d, id=%u)\n", dquot
->dq_type
,
511 (unsigned)dquot
->dq_id
);
515 OCFS2_DQUOT(dquot
)->dq_use_count
--;
516 err
= qtree_write_dquot(&info
->dqi_gi
, dquot
);
519 if (freeing
&& !OCFS2_DQUOT(dquot
)->dq_use_count
) {
520 err
= qtree_release_dquot(&info
->dqi_gi
, dquot
);
521 if (info_dirty(sb_dqinfo(sb
, type
))) {
522 err2
= __ocfs2_global_write_info(sb
, type
);
528 ocfs2_qinfo_unlock(info
, freeing
);
536 * Functions for periodic syncing of dquots with global file
538 static int ocfs2_sync_dquot_helper(struct dquot
*dquot
, unsigned long type
)
541 struct super_block
*sb
= dquot
->dq_sb
;
542 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
543 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
546 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot
->dq_id
,
547 dquot
->dq_type
, type
, sb
->s_id
);
548 if (type
!= dquot
->dq_type
)
550 status
= ocfs2_lock_global_qf(oinfo
, 1);
554 handle
= ocfs2_start_trans(osb
, OCFS2_QSYNC_CREDITS
);
555 if (IS_ERR(handle
)) {
556 status
= PTR_ERR(handle
);
560 mutex_lock(&sb_dqopt(sb
)->dqio_mutex
);
561 status
= ocfs2_sync_dquot(dquot
);
562 mutex_unlock(&sb_dqopt(sb
)->dqio_mutex
);
565 /* We have to write local structure as well... */
566 dquot_mark_dquot_dirty(dquot
);
567 status
= dquot_commit(dquot
);
570 ocfs2_commit_trans(osb
, handle
);
572 ocfs2_unlock_global_qf(oinfo
, 1);
578 static void qsync_work_fn(struct work_struct
*work
)
580 struct ocfs2_mem_dqinfo
*oinfo
= container_of(work
,
581 struct ocfs2_mem_dqinfo
,
583 struct super_block
*sb
= oinfo
->dqi_gqinode
->i_sb
;
585 dquot_scan_active(sb
, ocfs2_sync_dquot_helper
, oinfo
->dqi_type
);
586 queue_delayed_work(ocfs2_quota_wq
, &oinfo
->dqi_sync_work
,
587 oinfo
->dqi_syncjiff
);
591 * Wrappers for generic quota functions
594 static int ocfs2_write_dquot(struct dquot
*dquot
)
597 struct ocfs2_super
*osb
= OCFS2_SB(dquot
->dq_sb
);
600 mlog_entry("id=%u, type=%d", dquot
->dq_id
, dquot
->dq_type
);
602 handle
= ocfs2_start_trans(osb
, OCFS2_QWRITE_CREDITS
);
603 if (IS_ERR(handle
)) {
604 status
= PTR_ERR(handle
);
608 status
= dquot_commit(dquot
);
609 ocfs2_commit_trans(osb
, handle
);
615 int ocfs2_calc_qdel_credits(struct super_block
*sb
, int type
)
617 struct ocfs2_mem_dqinfo
*oinfo
;
618 int features
[MAXQUOTAS
] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA
,
619 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA
};
621 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb
, features
[type
]))
624 oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
625 /* We modify tree, leaf block, global info, local chunk header,
626 * global and local inode */
627 return oinfo
->dqi_gi
.dqi_qtree_depth
+ 2 + 1 +
628 2 * OCFS2_INODE_UPDATE_CREDITS
;
631 static int ocfs2_release_dquot(struct dquot
*dquot
)
634 struct ocfs2_mem_dqinfo
*oinfo
=
635 sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
)->dqi_priv
;
636 struct ocfs2_super
*osb
= OCFS2_SB(dquot
->dq_sb
);
639 mlog_entry("id=%u, type=%d", dquot
->dq_id
, dquot
->dq_type
);
641 status
= ocfs2_lock_global_qf(oinfo
, 1);
644 handle
= ocfs2_start_trans(osb
,
645 ocfs2_calc_qdel_credits(dquot
->dq_sb
, dquot
->dq_type
));
646 if (IS_ERR(handle
)) {
647 status
= PTR_ERR(handle
);
651 status
= dquot_release(dquot
);
652 ocfs2_commit_trans(osb
, handle
);
654 ocfs2_unlock_global_qf(oinfo
, 1);
660 int ocfs2_calc_qinit_credits(struct super_block
*sb
, int type
)
662 struct ocfs2_mem_dqinfo
*oinfo
;
663 int features
[MAXQUOTAS
] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA
,
664 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA
};
665 struct ocfs2_dinode
*lfe
, *gfe
;
667 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb
, features
[type
]))
670 oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
671 gfe
= (struct ocfs2_dinode
*)oinfo
->dqi_gqi_bh
->b_data
;
672 lfe
= (struct ocfs2_dinode
*)oinfo
->dqi_lqi_bh
->b_data
;
673 /* We can extend local file + global file. In local file we
674 * can modify info, chunk header block and dquot block. In
675 * global file we can modify info, tree and leaf block */
676 return ocfs2_calc_extend_credits(sb
, &lfe
->id2
.i_list
, 0) +
677 ocfs2_calc_extend_credits(sb
, &gfe
->id2
.i_list
, 0) +
678 3 + oinfo
->dqi_gi
.dqi_qtree_depth
+ 2;
681 static int ocfs2_acquire_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
);
690 /* We need an exclusive lock, because we're going to update use count
691 * and instantiate possibly new dquot structure */
692 status
= ocfs2_lock_global_qf(oinfo
, 1);
695 handle
= ocfs2_start_trans(osb
,
696 ocfs2_calc_qinit_credits(dquot
->dq_sb
, dquot
->dq_type
));
697 if (IS_ERR(handle
)) {
698 status
= PTR_ERR(handle
);
702 status
= dquot_acquire(dquot
);
703 ocfs2_commit_trans(osb
, handle
);
705 ocfs2_unlock_global_qf(oinfo
, 1);
711 static int ocfs2_mark_dquot_dirty(struct dquot
*dquot
)
713 unsigned long mask
= (1 << (DQ_LASTSET_B
+ QIF_ILIMITS_B
)) |
714 (1 << (DQ_LASTSET_B
+ QIF_BLIMITS_B
)) |
715 (1 << (DQ_LASTSET_B
+ QIF_INODES_B
)) |
716 (1 << (DQ_LASTSET_B
+ QIF_SPACE_B
)) |
717 (1 << (DQ_LASTSET_B
+ QIF_BTIME_B
)) |
718 (1 << (DQ_LASTSET_B
+ QIF_ITIME_B
));
721 struct super_block
*sb
= dquot
->dq_sb
;
722 int type
= dquot
->dq_type
;
723 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
725 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
727 mlog_entry("id=%u, type=%d", dquot
->dq_id
, type
);
728 dquot_mark_dquot_dirty(dquot
);
730 /* In case user set some limits, sync dquot immediately to global
731 * quota file so that information propagates quicker */
732 spin_lock(&dq_data_lock
);
733 if (dquot
->dq_flags
& mask
)
735 spin_unlock(&dq_data_lock
);
737 status
= ocfs2_write_dquot(dquot
);
740 status
= ocfs2_lock_global_qf(oinfo
, 1);
743 handle
= ocfs2_start_trans(osb
, OCFS2_QSYNC_CREDITS
);
744 if (IS_ERR(handle
)) {
745 status
= PTR_ERR(handle
);
749 status
= ocfs2_sync_dquot(dquot
);
754 /* Now write updated local dquot structure */
755 status
= dquot_commit(dquot
);
757 ocfs2_commit_trans(osb
, handle
);
759 ocfs2_unlock_global_qf(oinfo
, 1);
765 /* This should happen only after set_dqinfo(). */
766 static int ocfs2_write_info(struct super_block
*sb
, int type
)
770 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
774 status
= ocfs2_lock_global_qf(oinfo
, 1);
777 handle
= ocfs2_start_trans(OCFS2_SB(sb
), OCFS2_QINFO_WRITE_CREDITS
);
778 if (IS_ERR(handle
)) {
779 status
= PTR_ERR(handle
);
783 status
= dquot_commit_info(sb
, type
);
784 ocfs2_commit_trans(OCFS2_SB(sb
), handle
);
786 ocfs2_unlock_global_qf(oinfo
, 1);
792 /* This is difficult. We have to lock quota inode and start transaction
793 * in this function but we don't want to take the penalty of exlusive
794 * quota file lock when we are just going to use cached structures. So
795 * we just take read lock check whether we have dquot cached and if so,
796 * we don't have to take the write lock... */
797 static int ocfs2_dquot_initialize(struct inode
*inode
, int type
)
799 handle_t
*handle
= NULL
;
801 struct super_block
*sb
= inode
->i_sb
;
802 struct ocfs2_mem_dqinfo
*oinfo
;
809 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
810 if (type
!= -1 && cnt
!= type
)
812 if (!sb_has_quota_active(sb
, cnt
))
814 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
815 status
= ocfs2_lock_global_qf(oinfo
, 0);
818 /* This is just a performance optimization not a reliable test.
819 * Since we hold an inode lock, noone can actually release
820 * the structure until we are finished with initialization. */
821 if (inode
->i_dquot
[cnt
] != NODQUOT
) {
822 ocfs2_unlock_global_qf(oinfo
, 0);
825 /* When we have inode lock, we know that no dquot_release() can
826 * run and thus we can safely check whether we need to
827 * read+modify global file to get quota information or whether
828 * our node already has it. */
831 else if (cnt
== GRPQUOTA
)
835 /* Obtain exclusion from quota off... */
836 down_write(&sb_dqopt(sb
)->dqptr_sem
);
837 exclusive
= !dquot_is_cached(sb
, id
, cnt
);
838 up_write(&sb_dqopt(sb
)->dqptr_sem
);
840 status
= ocfs2_lock_global_qf(oinfo
, 1);
846 handle
= ocfs2_start_trans(OCFS2_SB(sb
),
847 ocfs2_calc_qinit_credits(sb
, cnt
));
848 if (IS_ERR(handle
)) {
849 status
= PTR_ERR(handle
);
854 dquot_initialize(inode
, cnt
);
856 ocfs2_commit_trans(OCFS2_SB(sb
), handle
);
857 ocfs2_unlock_global_qf(oinfo
, 1);
859 ocfs2_unlock_global_qf(oinfo
, 0);
865 ocfs2_unlock_global_qf(oinfo
, 1);
866 ocfs2_unlock_global_qf(oinfo
, 0);
872 static int ocfs2_dquot_drop_slow(struct inode
*inode
)
876 int got_lock
[MAXQUOTAS
] = {0, 0};
878 struct super_block
*sb
= inode
->i_sb
;
879 struct ocfs2_mem_dqinfo
*oinfo
;
881 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
882 if (!sb_has_quota_active(sb
, cnt
))
884 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
885 status
= ocfs2_lock_global_qf(oinfo
, 1);
890 handle
= ocfs2_start_trans(OCFS2_SB(sb
),
891 ocfs2_calc_qinit_credits(sb
, USRQUOTA
) +
892 ocfs2_calc_qinit_credits(sb
, GRPQUOTA
));
893 if (IS_ERR(handle
)) {
894 status
= PTR_ERR(handle
);
899 ocfs2_commit_trans(OCFS2_SB(sb
), handle
);
901 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++)
903 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
904 ocfs2_unlock_global_qf(oinfo
, 1);
909 /* See the comment before ocfs2_dquot_initialize. */
910 static int ocfs2_dquot_drop(struct inode
*inode
)
913 struct super_block
*sb
= inode
->i_sb
;
914 struct ocfs2_mem_dqinfo
*oinfo
;
917 int got_lock
[MAXQUOTAS
] = {0, 0};
920 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
921 if (!sb_has_quota_active(sb
, cnt
))
923 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
924 status
= ocfs2_lock_global_qf(oinfo
, 0);
929 /* Lock against anyone releasing references so that when when we check
930 * we know we are not going to be last ones to release dquot */
931 down_write(&sb_dqopt(sb
)->dqptr_sem
);
932 /* Urgh, this is a terrible hack :( */
933 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
934 if (inode
->i_dquot
[cnt
] != NODQUOT
&&
935 atomic_read(&inode
->i_dquot
[cnt
]->dq_count
) > 1) {
941 dquot_drop_locked(inode
);
942 up_write(&sb_dqopt(sb
)->dqptr_sem
);
944 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++)
946 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
947 ocfs2_unlock_global_qf(oinfo
, 0);
949 /* In case we bailed out because we had to do expensive locking
952 status
= ocfs2_dquot_drop_slow(inode
);
957 static struct dquot
*ocfs2_alloc_dquot(struct super_block
*sb
, int type
)
959 struct ocfs2_dquot
*dquot
=
960 kmem_cache_zalloc(ocfs2_dquot_cachep
, GFP_NOFS
);
964 return &dquot
->dq_dquot
;
967 static void ocfs2_destroy_dquot(struct dquot
*dquot
)
969 kmem_cache_free(ocfs2_dquot_cachep
, dquot
);
972 struct dquot_operations ocfs2_quota_operations
= {
973 .initialize
= ocfs2_dquot_initialize
,
974 .drop
= ocfs2_dquot_drop
,
975 .alloc_space
= dquot_alloc_space
,
976 .alloc_inode
= dquot_alloc_inode
,
977 .free_space
= dquot_free_space
,
978 .free_inode
= dquot_free_inode
,
979 .transfer
= dquot_transfer
,
980 .write_dquot
= ocfs2_write_dquot
,
981 .acquire_dquot
= ocfs2_acquire_dquot
,
982 .release_dquot
= ocfs2_release_dquot
,
983 .mark_dirty
= ocfs2_mark_dquot_dirty
,
984 .write_info
= ocfs2_write_info
,
985 .alloc_dquot
= ocfs2_alloc_dquot
,
986 .destroy_dquot
= ocfs2_destroy_dquot
,
989 int ocfs2_quota_setup(void)
991 ocfs2_quota_wq
= create_workqueue("o2quot");
997 void ocfs2_quota_shutdown(void)
999 if (ocfs2_quota_wq
) {
1000 flush_workqueue(ocfs2_quota_wq
);
1001 destroy_workqueue(ocfs2_quota_wq
);
1002 ocfs2_quota_wq
= NULL
;