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 struct buffer_head
*ocfs2_read_quota_block(struct inode
*inode
,
93 struct buffer_head
*tmp
= NULL
;
95 *err
= ocfs2_read_virt_blocks(inode
, block
, 1, &tmp
, 0, NULL
);
102 static struct buffer_head
*ocfs2_get_quota_block(struct inode
*inode
,
106 struct buffer_head
*bh
;
108 down_read(&OCFS2_I(inode
)->ip_alloc_sem
);
109 *err
= ocfs2_extent_map_get_blocks(inode
, block
, &pblock
, &pcount
,
111 up_read(&OCFS2_I(inode
)->ip_alloc_sem
);
116 bh
= sb_getblk(inode
->i_sb
, pblock
);
124 /* Read data from global quotafile - avoid pagecache and such because we cannot
125 * afford acquiring the locks... We use quota cluster lock to serialize
126 * operations. Caller is responsible for acquiring it. */
127 ssize_t
ocfs2_quota_read(struct super_block
*sb
, int type
, char *data
,
128 size_t len
, loff_t off
)
130 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
131 struct inode
*gqinode
= oinfo
->dqi_gqinode
;
132 loff_t i_size
= i_size_read(gqinode
);
133 int offset
= off
& (sb
->s_blocksize
- 1);
134 sector_t blk
= off
>> sb
->s_blocksize_bits
;
136 struct buffer_head
*bh
;
137 size_t toread
, tocopy
;
141 if (off
+ len
> i_size
)
145 tocopy
= min((size_t)(sb
->s_blocksize
- offset
), toread
);
146 bh
= ocfs2_read_quota_block(gqinode
, blk
, &err
);
151 memcpy(data
, bh
->b_data
+ offset
, tocopy
);
161 /* Write to quotafile (we know the transaction is already started and has
163 ssize_t
ocfs2_quota_write(struct super_block
*sb
, int type
,
164 const char *data
, size_t len
, loff_t off
)
166 struct mem_dqinfo
*info
= sb_dqinfo(sb
, type
);
167 struct ocfs2_mem_dqinfo
*oinfo
= info
->dqi_priv
;
168 struct inode
*gqinode
= oinfo
->dqi_gqinode
;
169 int offset
= off
& (sb
->s_blocksize
- 1);
170 sector_t blk
= off
>> sb
->s_blocksize_bits
;
171 int err
= 0, new = 0;
172 struct buffer_head
*bh
;
173 handle_t
*handle
= journal_current_handle();
176 mlog(ML_ERROR
, "Quota write (off=%llu, len=%llu) cancelled "
177 "because transaction was not started.\n",
178 (unsigned long long)off
, (unsigned long long)len
);
181 if (len
> sb
->s_blocksize
- OCFS2_QBLK_RESERVED_SPACE
- offset
) {
183 len
= sb
->s_blocksize
- OCFS2_QBLK_RESERVED_SPACE
- offset
;
186 mutex_lock_nested(&gqinode
->i_mutex
, I_MUTEX_QUOTA
);
187 if (gqinode
->i_size
< off
+ len
) {
188 down_write(&OCFS2_I(gqinode
)->ip_alloc_sem
);
189 err
= ocfs2_extend_no_holes(gqinode
, off
+ len
, off
);
190 up_write(&OCFS2_I(gqinode
)->ip_alloc_sem
);
193 err
= ocfs2_simple_size_update(gqinode
,
200 /* Not rewriting whole block? */
201 if ((offset
|| len
< sb
->s_blocksize
- OCFS2_QBLK_RESERVED_SPACE
) &&
203 bh
= ocfs2_read_quota_block(gqinode
, blk
, &err
);
208 err
= ocfs2_journal_access(handle
, gqinode
, bh
,
209 OCFS2_JOURNAL_ACCESS_WRITE
);
211 bh
= ocfs2_get_quota_block(gqinode
, blk
, &err
);
216 err
= ocfs2_journal_access(handle
, gqinode
, bh
,
217 OCFS2_JOURNAL_ACCESS_CREATE
);
225 memset(bh
->b_data
, 0, sb
->s_blocksize
);
226 memcpy(bh
->b_data
+ offset
, data
, len
);
227 flush_dcache_page(bh
->b_page
);
229 ocfs2_set_buffer_uptodate(gqinode
, bh
);
230 err
= ocfs2_journal_dirty(handle
, bh
);
236 mutex_unlock(&gqinode
->i_mutex
);
240 gqinode
->i_version
++;
241 ocfs2_mark_inode_dirty(handle
, gqinode
, oinfo
->dqi_gqi_bh
);
242 mutex_unlock(&gqinode
->i_mutex
);
246 int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo
*oinfo
, int ex
)
249 struct buffer_head
*bh
= NULL
;
251 status
= ocfs2_inode_lock(oinfo
->dqi_gqinode
, &bh
, ex
);
254 spin_lock(&dq_data_lock
);
255 if (!oinfo
->dqi_gqi_count
++)
256 oinfo
->dqi_gqi_bh
= bh
;
258 WARN_ON(bh
!= oinfo
->dqi_gqi_bh
);
259 spin_unlock(&dq_data_lock
);
263 void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo
*oinfo
, int ex
)
265 ocfs2_inode_unlock(oinfo
->dqi_gqinode
, ex
);
266 brelse(oinfo
->dqi_gqi_bh
);
267 spin_lock(&dq_data_lock
);
268 if (!--oinfo
->dqi_gqi_count
)
269 oinfo
->dqi_gqi_bh
= NULL
;
270 spin_unlock(&dq_data_lock
);
273 /* Read information header from global quota file */
274 int ocfs2_global_read_info(struct super_block
*sb
, int type
)
276 struct inode
*gqinode
= NULL
;
277 unsigned int ino
[MAXQUOTAS
] = { USER_QUOTA_SYSTEM_INODE
,
278 GROUP_QUOTA_SYSTEM_INODE
};
279 struct ocfs2_global_disk_dqinfo dinfo
;
280 struct mem_dqinfo
*info
= sb_dqinfo(sb
, type
);
281 struct ocfs2_mem_dqinfo
*oinfo
= info
->dqi_priv
;
286 /* Read global header */
287 gqinode
= ocfs2_get_system_file_inode(OCFS2_SB(sb
), ino
[type
],
290 mlog(ML_ERROR
, "failed to get global quota inode (type=%d)\n",
295 oinfo
->dqi_gi
.dqi_sb
= sb
;
296 oinfo
->dqi_gi
.dqi_type
= type
;
297 ocfs2_qinfo_lock_res_init(&oinfo
->dqi_gqlock
, oinfo
);
298 oinfo
->dqi_gi
.dqi_entry_size
= sizeof(struct ocfs2_global_disk_dqblk
);
299 oinfo
->dqi_gi
.dqi_ops
= &ocfs2_global_ops
;
300 oinfo
->dqi_gqi_bh
= NULL
;
301 oinfo
->dqi_gqi_count
= 0;
302 oinfo
->dqi_gqinode
= gqinode
;
303 status
= ocfs2_lock_global_qf(oinfo
, 0);
308 status
= sb
->s_op
->quota_read(sb
, type
, (char *)&dinfo
,
309 sizeof(struct ocfs2_global_disk_dqinfo
),
310 OCFS2_GLOBAL_INFO_OFF
);
311 ocfs2_unlock_global_qf(oinfo
, 0);
312 if (status
!= sizeof(struct ocfs2_global_disk_dqinfo
)) {
313 mlog(ML_ERROR
, "Cannot read global quota info (%d).\n",
320 info
->dqi_bgrace
= le32_to_cpu(dinfo
.dqi_bgrace
);
321 info
->dqi_igrace
= le32_to_cpu(dinfo
.dqi_igrace
);
322 oinfo
->dqi_syncms
= le32_to_cpu(dinfo
.dqi_syncms
);
323 oinfo
->dqi_syncjiff
= msecs_to_jiffies(oinfo
->dqi_syncms
);
324 oinfo
->dqi_gi
.dqi_blocks
= le32_to_cpu(dinfo
.dqi_blocks
);
325 oinfo
->dqi_gi
.dqi_free_blk
= le32_to_cpu(dinfo
.dqi_free_blk
);
326 oinfo
->dqi_gi
.dqi_free_entry
= le32_to_cpu(dinfo
.dqi_free_entry
);
327 oinfo
->dqi_gi
.dqi_blocksize_bits
= sb
->s_blocksize_bits
;
328 oinfo
->dqi_gi
.dqi_usable_bs
= sb
->s_blocksize
-
329 OCFS2_QBLK_RESERVED_SPACE
;
330 oinfo
->dqi_gi
.dqi_qtree_depth
= qtree_depth(&oinfo
->dqi_gi
);
331 INIT_DELAYED_WORK(&oinfo
->dqi_sync_work
, qsync_work_fn
);
332 queue_delayed_work(ocfs2_quota_wq
, &oinfo
->dqi_sync_work
,
333 oinfo
->dqi_syncjiff
);
340 /* Write information to global quota file. Expects exlusive lock on quota
341 * file inode and quota info */
342 static int __ocfs2_global_write_info(struct super_block
*sb
, int type
)
344 struct mem_dqinfo
*info
= sb_dqinfo(sb
, type
);
345 struct ocfs2_mem_dqinfo
*oinfo
= info
->dqi_priv
;
346 struct ocfs2_global_disk_dqinfo dinfo
;
349 spin_lock(&dq_data_lock
);
350 info
->dqi_flags
&= ~DQF_INFO_DIRTY
;
351 dinfo
.dqi_bgrace
= cpu_to_le32(info
->dqi_bgrace
);
352 dinfo
.dqi_igrace
= cpu_to_le32(info
->dqi_igrace
);
353 spin_unlock(&dq_data_lock
);
354 dinfo
.dqi_syncms
= cpu_to_le32(oinfo
->dqi_syncms
);
355 dinfo
.dqi_blocks
= cpu_to_le32(oinfo
->dqi_gi
.dqi_blocks
);
356 dinfo
.dqi_free_blk
= cpu_to_le32(oinfo
->dqi_gi
.dqi_free_blk
);
357 dinfo
.dqi_free_entry
= cpu_to_le32(oinfo
->dqi_gi
.dqi_free_entry
);
358 size
= sb
->s_op
->quota_write(sb
, type
, (char *)&dinfo
,
359 sizeof(struct ocfs2_global_disk_dqinfo
),
360 OCFS2_GLOBAL_INFO_OFF
);
361 if (size
!= sizeof(struct ocfs2_global_disk_dqinfo
)) {
362 mlog(ML_ERROR
, "Cannot write global quota info structure\n");
370 int ocfs2_global_write_info(struct super_block
*sb
, int type
)
373 struct ocfs2_mem_dqinfo
*info
= sb_dqinfo(sb
, type
)->dqi_priv
;
375 err
= ocfs2_qinfo_lock(info
, 1);
378 err
= __ocfs2_global_write_info(sb
, type
);
379 ocfs2_qinfo_unlock(info
, 1);
383 /* Read in information from global quota file and acquire a reference to it.
384 * dquot_acquire() has already started the transaction and locked quota file */
385 int ocfs2_global_read_dquot(struct dquot
*dquot
)
387 int err
, err2
, ex
= 0;
388 struct ocfs2_mem_dqinfo
*info
=
389 sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
)->dqi_priv
;
391 err
= ocfs2_qinfo_lock(info
, 0);
394 err
= qtree_read_dquot(&info
->dqi_gi
, dquot
);
397 OCFS2_DQUOT(dquot
)->dq_use_count
++;
398 OCFS2_DQUOT(dquot
)->dq_origspace
= dquot
->dq_dqb
.dqb_curspace
;
399 OCFS2_DQUOT(dquot
)->dq_originodes
= dquot
->dq_dqb
.dqb_curinodes
;
400 if (!dquot
->dq_off
) { /* No real quota entry? */
401 /* Upgrade to exclusive lock for allocation */
402 err
= ocfs2_qinfo_lock(info
, 1);
407 err
= qtree_write_dquot(&info
->dqi_gi
, dquot
);
408 if (ex
&& info_dirty(sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
))) {
409 err2
= __ocfs2_global_write_info(dquot
->dq_sb
, dquot
->dq_type
);
415 ocfs2_qinfo_unlock(info
, 1);
416 ocfs2_qinfo_unlock(info
, 0);
423 /* Sync local information about quota modifications with global quota file.
424 * Caller must have started the transaction and obtained exclusive lock for
425 * global quota file inode */
426 int __ocfs2_sync_dquot(struct dquot
*dquot
, int freeing
)
429 struct super_block
*sb
= dquot
->dq_sb
;
430 int type
= dquot
->dq_type
;
431 struct ocfs2_mem_dqinfo
*info
= sb_dqinfo(sb
, type
)->dqi_priv
;
432 struct ocfs2_global_disk_dqblk dqblk
;
433 s64 spacechange
, inodechange
;
434 time_t olditime
, oldbtime
;
436 err
= sb
->s_op
->quota_read(sb
, type
, (char *)&dqblk
,
437 sizeof(struct ocfs2_global_disk_dqblk
),
439 if (err
!= sizeof(struct ocfs2_global_disk_dqblk
)) {
441 mlog(ML_ERROR
, "Short read from global quota file "
448 /* Update space and inode usage. Get also other information from
449 * global quota file so that we don't overwrite any changes there.
451 spin_lock(&dq_data_lock
);
452 spacechange
= dquot
->dq_dqb
.dqb_curspace
-
453 OCFS2_DQUOT(dquot
)->dq_origspace
;
454 inodechange
= dquot
->dq_dqb
.dqb_curinodes
-
455 OCFS2_DQUOT(dquot
)->dq_originodes
;
456 olditime
= dquot
->dq_dqb
.dqb_itime
;
457 oldbtime
= dquot
->dq_dqb
.dqb_btime
;
458 ocfs2_global_disk2memdqb(dquot
, &dqblk
);
459 mlog(0, "Syncing global dquot %d space %lld+%lld, inodes %lld+%lld\n",
460 dquot
->dq_id
, dquot
->dq_dqb
.dqb_curspace
, spacechange
,
461 dquot
->dq_dqb
.dqb_curinodes
, inodechange
);
462 if (!test_bit(DQ_LASTSET_B
+ QIF_SPACE_B
, &dquot
->dq_flags
))
463 dquot
->dq_dqb
.dqb_curspace
+= spacechange
;
464 if (!test_bit(DQ_LASTSET_B
+ QIF_INODES_B
, &dquot
->dq_flags
))
465 dquot
->dq_dqb
.dqb_curinodes
+= inodechange
;
466 /* Set properly space grace time... */
467 if (dquot
->dq_dqb
.dqb_bsoftlimit
&&
468 dquot
->dq_dqb
.dqb_curspace
> dquot
->dq_dqb
.dqb_bsoftlimit
) {
469 if (!test_bit(DQ_LASTSET_B
+ QIF_BTIME_B
, &dquot
->dq_flags
) &&
471 if (dquot
->dq_dqb
.dqb_btime
> 0)
472 dquot
->dq_dqb
.dqb_btime
=
473 min(dquot
->dq_dqb
.dqb_btime
, oldbtime
);
475 dquot
->dq_dqb
.dqb_btime
= oldbtime
;
478 dquot
->dq_dqb
.dqb_btime
= 0;
479 clear_bit(DQ_BLKS_B
, &dquot
->dq_flags
);
481 /* Set properly inode grace time... */
482 if (dquot
->dq_dqb
.dqb_isoftlimit
&&
483 dquot
->dq_dqb
.dqb_curinodes
> dquot
->dq_dqb
.dqb_isoftlimit
) {
484 if (!test_bit(DQ_LASTSET_B
+ QIF_ITIME_B
, &dquot
->dq_flags
) &&
486 if (dquot
->dq_dqb
.dqb_itime
> 0)
487 dquot
->dq_dqb
.dqb_itime
=
488 min(dquot
->dq_dqb
.dqb_itime
, olditime
);
490 dquot
->dq_dqb
.dqb_itime
= olditime
;
493 dquot
->dq_dqb
.dqb_itime
= 0;
494 clear_bit(DQ_INODES_B
, &dquot
->dq_flags
);
496 /* All information is properly updated, clear the flags */
497 __clear_bit(DQ_LASTSET_B
+ QIF_SPACE_B
, &dquot
->dq_flags
);
498 __clear_bit(DQ_LASTSET_B
+ QIF_INODES_B
, &dquot
->dq_flags
);
499 __clear_bit(DQ_LASTSET_B
+ QIF_BLIMITS_B
, &dquot
->dq_flags
);
500 __clear_bit(DQ_LASTSET_B
+ QIF_ILIMITS_B
, &dquot
->dq_flags
);
501 __clear_bit(DQ_LASTSET_B
+ QIF_BTIME_B
, &dquot
->dq_flags
);
502 __clear_bit(DQ_LASTSET_B
+ QIF_ITIME_B
, &dquot
->dq_flags
);
503 OCFS2_DQUOT(dquot
)->dq_origspace
= dquot
->dq_dqb
.dqb_curspace
;
504 OCFS2_DQUOT(dquot
)->dq_originodes
= dquot
->dq_dqb
.dqb_curinodes
;
505 spin_unlock(&dq_data_lock
);
506 err
= ocfs2_qinfo_lock(info
, freeing
);
508 mlog(ML_ERROR
, "Failed to lock quota info, loosing quota write"
509 " (type=%d, id=%u)\n", dquot
->dq_type
,
510 (unsigned)dquot
->dq_id
);
514 OCFS2_DQUOT(dquot
)->dq_use_count
--;
515 err
= qtree_write_dquot(&info
->dqi_gi
, dquot
);
518 if (freeing
&& !OCFS2_DQUOT(dquot
)->dq_use_count
) {
519 err
= qtree_release_dquot(&info
->dqi_gi
, dquot
);
520 if (info_dirty(sb_dqinfo(sb
, type
))) {
521 err2
= __ocfs2_global_write_info(sb
, type
);
527 ocfs2_qinfo_unlock(info
, freeing
);
535 * Functions for periodic syncing of dquots with global file
537 static int ocfs2_sync_dquot_helper(struct dquot
*dquot
, unsigned long type
)
540 struct super_block
*sb
= dquot
->dq_sb
;
541 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
542 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
545 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot
->dq_id
,
546 dquot
->dq_type
, type
, sb
->s_id
);
547 if (type
!= dquot
->dq_type
)
549 status
= ocfs2_lock_global_qf(oinfo
, 1);
553 handle
= ocfs2_start_trans(osb
, OCFS2_QSYNC_CREDITS
);
554 if (IS_ERR(handle
)) {
555 status
= PTR_ERR(handle
);
559 mutex_lock(&sb_dqopt(sb
)->dqio_mutex
);
560 status
= ocfs2_sync_dquot(dquot
);
561 mutex_unlock(&sb_dqopt(sb
)->dqio_mutex
);
564 /* We have to write local structure as well... */
565 dquot_mark_dquot_dirty(dquot
);
566 status
= dquot_commit(dquot
);
569 ocfs2_commit_trans(osb
, handle
);
571 ocfs2_unlock_global_qf(oinfo
, 1);
577 static void qsync_work_fn(struct work_struct
*work
)
579 struct ocfs2_mem_dqinfo
*oinfo
= container_of(work
,
580 struct ocfs2_mem_dqinfo
,
582 struct super_block
*sb
= oinfo
->dqi_gqinode
->i_sb
;
584 dquot_scan_active(sb
, ocfs2_sync_dquot_helper
, oinfo
->dqi_type
);
585 queue_delayed_work(ocfs2_quota_wq
, &oinfo
->dqi_sync_work
,
586 oinfo
->dqi_syncjiff
);
590 * Wrappers for generic quota functions
593 static int ocfs2_write_dquot(struct dquot
*dquot
)
596 struct ocfs2_super
*osb
= OCFS2_SB(dquot
->dq_sb
);
599 mlog_entry("id=%u, type=%d", dquot
->dq_id
, dquot
->dq_type
);
601 handle
= ocfs2_start_trans(osb
, OCFS2_QWRITE_CREDITS
);
602 if (IS_ERR(handle
)) {
603 status
= PTR_ERR(handle
);
607 status
= dquot_commit(dquot
);
608 ocfs2_commit_trans(osb
, handle
);
614 int ocfs2_calc_qdel_credits(struct super_block
*sb
, int type
)
616 struct ocfs2_mem_dqinfo
*oinfo
;
617 int features
[MAXQUOTAS
] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA
,
618 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA
};
620 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb
, features
[type
]))
623 oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
624 /* We modify tree, leaf block, global info, local chunk header,
625 * global and local inode */
626 return oinfo
->dqi_gi
.dqi_qtree_depth
+ 2 + 1 +
627 2 * OCFS2_INODE_UPDATE_CREDITS
;
630 static int ocfs2_release_dquot(struct dquot
*dquot
)
633 struct ocfs2_mem_dqinfo
*oinfo
=
634 sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
)->dqi_priv
;
635 struct ocfs2_super
*osb
= OCFS2_SB(dquot
->dq_sb
);
638 mlog_entry("id=%u, type=%d", dquot
->dq_id
, dquot
->dq_type
);
640 status
= ocfs2_lock_global_qf(oinfo
, 1);
643 handle
= ocfs2_start_trans(osb
,
644 ocfs2_calc_qdel_credits(dquot
->dq_sb
, dquot
->dq_type
));
645 if (IS_ERR(handle
)) {
646 status
= PTR_ERR(handle
);
650 status
= dquot_release(dquot
);
651 ocfs2_commit_trans(osb
, handle
);
653 ocfs2_unlock_global_qf(oinfo
, 1);
659 int ocfs2_calc_qinit_credits(struct super_block
*sb
, int type
)
661 struct ocfs2_mem_dqinfo
*oinfo
;
662 int features
[MAXQUOTAS
] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA
,
663 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA
};
664 struct ocfs2_dinode
*lfe
, *gfe
;
666 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb
, features
[type
]))
669 oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
670 gfe
= (struct ocfs2_dinode
*)oinfo
->dqi_gqi_bh
->b_data
;
671 lfe
= (struct ocfs2_dinode
*)oinfo
->dqi_lqi_bh
->b_data
;
672 /* We can extend local file + global file. In local file we
673 * can modify info, chunk header block and dquot block. In
674 * global file we can modify info, tree and leaf block */
675 return ocfs2_calc_extend_credits(sb
, &lfe
->id2
.i_list
, 0) +
676 ocfs2_calc_extend_credits(sb
, &gfe
->id2
.i_list
, 0) +
677 3 + oinfo
->dqi_gi
.dqi_qtree_depth
+ 2;
680 static int ocfs2_acquire_dquot(struct dquot
*dquot
)
683 struct ocfs2_mem_dqinfo
*oinfo
=
684 sb_dqinfo(dquot
->dq_sb
, dquot
->dq_type
)->dqi_priv
;
685 struct ocfs2_super
*osb
= OCFS2_SB(dquot
->dq_sb
);
688 mlog_entry("id=%u, type=%d", dquot
->dq_id
, dquot
->dq_type
);
689 /* We need an exclusive lock, because we're going to update use count
690 * and instantiate possibly new dquot structure */
691 status
= ocfs2_lock_global_qf(oinfo
, 1);
694 handle
= ocfs2_start_trans(osb
,
695 ocfs2_calc_qinit_credits(dquot
->dq_sb
, dquot
->dq_type
));
696 if (IS_ERR(handle
)) {
697 status
= PTR_ERR(handle
);
701 status
= dquot_acquire(dquot
);
702 ocfs2_commit_trans(osb
, handle
);
704 ocfs2_unlock_global_qf(oinfo
, 1);
710 static int ocfs2_mark_dquot_dirty(struct dquot
*dquot
)
712 unsigned long mask
= (1 << (DQ_LASTSET_B
+ QIF_ILIMITS_B
)) |
713 (1 << (DQ_LASTSET_B
+ QIF_BLIMITS_B
)) |
714 (1 << (DQ_LASTSET_B
+ QIF_INODES_B
)) |
715 (1 << (DQ_LASTSET_B
+ QIF_SPACE_B
)) |
716 (1 << (DQ_LASTSET_B
+ QIF_BTIME_B
)) |
717 (1 << (DQ_LASTSET_B
+ QIF_ITIME_B
));
720 struct super_block
*sb
= dquot
->dq_sb
;
721 int type
= dquot
->dq_type
;
722 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
724 struct ocfs2_super
*osb
= OCFS2_SB(sb
);
726 mlog_entry("id=%u, type=%d", dquot
->dq_id
, type
);
727 dquot_mark_dquot_dirty(dquot
);
729 /* In case user set some limits, sync dquot immediately to global
730 * quota file so that information propagates quicker */
731 spin_lock(&dq_data_lock
);
732 if (dquot
->dq_flags
& mask
)
734 spin_unlock(&dq_data_lock
);
736 status
= ocfs2_write_dquot(dquot
);
739 status
= ocfs2_lock_global_qf(oinfo
, 1);
742 handle
= ocfs2_start_trans(osb
, OCFS2_QSYNC_CREDITS
);
743 if (IS_ERR(handle
)) {
744 status
= PTR_ERR(handle
);
748 status
= ocfs2_sync_dquot(dquot
);
753 /* Now write updated local dquot structure */
754 status
= dquot_commit(dquot
);
756 ocfs2_commit_trans(osb
, handle
);
758 ocfs2_unlock_global_qf(oinfo
, 1);
764 /* This should happen only after set_dqinfo(). */
765 static int ocfs2_write_info(struct super_block
*sb
, int type
)
769 struct ocfs2_mem_dqinfo
*oinfo
= sb_dqinfo(sb
, type
)->dqi_priv
;
773 status
= ocfs2_lock_global_qf(oinfo
, 1);
776 handle
= ocfs2_start_trans(OCFS2_SB(sb
), OCFS2_QINFO_WRITE_CREDITS
);
777 if (IS_ERR(handle
)) {
778 status
= PTR_ERR(handle
);
782 status
= dquot_commit_info(sb
, type
);
783 ocfs2_commit_trans(OCFS2_SB(sb
), handle
);
785 ocfs2_unlock_global_qf(oinfo
, 1);
791 /* This is difficult. We have to lock quota inode and start transaction
792 * in this function but we don't want to take the penalty of exlusive
793 * quota file lock when we are just going to use cached structures. So
794 * we just take read lock check whether we have dquot cached and if so,
795 * we don't have to take the write lock... */
796 static int ocfs2_dquot_initialize(struct inode
*inode
, int type
)
798 handle_t
*handle
= NULL
;
800 struct super_block
*sb
= inode
->i_sb
;
801 struct ocfs2_mem_dqinfo
*oinfo
;
808 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
809 if (type
!= -1 && cnt
!= type
)
811 if (!sb_has_quota_active(sb
, cnt
))
813 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
814 status
= ocfs2_lock_global_qf(oinfo
, 0);
817 /* This is just a performance optimization not a reliable test.
818 * Since we hold an inode lock, noone can actually release
819 * the structure until we are finished with initialization. */
820 if (inode
->i_dquot
[cnt
] != NODQUOT
) {
821 ocfs2_unlock_global_qf(oinfo
, 0);
824 /* When we have inode lock, we know that no dquot_release() can
825 * run and thus we can safely check whether we need to
826 * read+modify global file to get quota information or whether
827 * our node already has it. */
830 else if (cnt
== GRPQUOTA
)
834 /* Obtain exclusion from quota off... */
835 down_write(&sb_dqopt(sb
)->dqptr_sem
);
836 exclusive
= !dquot_is_cached(sb
, id
, cnt
);
837 up_write(&sb_dqopt(sb
)->dqptr_sem
);
839 status
= ocfs2_lock_global_qf(oinfo
, 1);
845 handle
= ocfs2_start_trans(OCFS2_SB(sb
),
846 ocfs2_calc_qinit_credits(sb
, cnt
));
847 if (IS_ERR(handle
)) {
848 status
= PTR_ERR(handle
);
853 dquot_initialize(inode
, cnt
);
855 ocfs2_commit_trans(OCFS2_SB(sb
), handle
);
856 ocfs2_unlock_global_qf(oinfo
, 1);
858 ocfs2_unlock_global_qf(oinfo
, 0);
864 ocfs2_unlock_global_qf(oinfo
, 1);
865 ocfs2_unlock_global_qf(oinfo
, 0);
871 static int ocfs2_dquot_drop_slow(struct inode
*inode
)
875 int got_lock
[MAXQUOTAS
] = {0, 0};
877 struct super_block
*sb
= inode
->i_sb
;
878 struct ocfs2_mem_dqinfo
*oinfo
;
880 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
881 if (!sb_has_quota_active(sb
, cnt
))
883 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
884 status
= ocfs2_lock_global_qf(oinfo
, 1);
889 handle
= ocfs2_start_trans(OCFS2_SB(sb
),
890 ocfs2_calc_qinit_credits(sb
, USRQUOTA
) +
891 ocfs2_calc_qinit_credits(sb
, GRPQUOTA
));
892 if (IS_ERR(handle
)) {
893 status
= PTR_ERR(handle
);
898 ocfs2_commit_trans(OCFS2_SB(sb
), handle
);
900 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++)
902 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
903 ocfs2_unlock_global_qf(oinfo
, 1);
908 /* See the comment before ocfs2_dquot_initialize. */
909 static int ocfs2_dquot_drop(struct inode
*inode
)
912 struct super_block
*sb
= inode
->i_sb
;
913 struct ocfs2_mem_dqinfo
*oinfo
;
916 int got_lock
[MAXQUOTAS
] = {0, 0};
919 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
920 if (!sb_has_quota_active(sb
, cnt
))
922 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
923 status
= ocfs2_lock_global_qf(oinfo
, 0);
928 /* Lock against anyone releasing references so that when when we check
929 * we know we are not going to be last ones to release dquot */
930 down_write(&sb_dqopt(sb
)->dqptr_sem
);
931 /* Urgh, this is a terrible hack :( */
932 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++) {
933 if (inode
->i_dquot
[cnt
] != NODQUOT
&&
934 atomic_read(&inode
->i_dquot
[cnt
]->dq_count
) > 1) {
940 dquot_drop_locked(inode
);
941 up_write(&sb_dqopt(sb
)->dqptr_sem
);
943 for (cnt
= 0; cnt
< MAXQUOTAS
; cnt
++)
945 oinfo
= sb_dqinfo(sb
, cnt
)->dqi_priv
;
946 ocfs2_unlock_global_qf(oinfo
, 0);
948 /* In case we bailed out because we had to do expensive locking
951 status
= ocfs2_dquot_drop_slow(inode
);
956 static struct dquot
*ocfs2_alloc_dquot(struct super_block
*sb
, int type
)
958 struct ocfs2_dquot
*dquot
=
959 kmem_cache_zalloc(ocfs2_dquot_cachep
, GFP_NOFS
);
963 return &dquot
->dq_dquot
;
966 static void ocfs2_destroy_dquot(struct dquot
*dquot
)
968 kmem_cache_free(ocfs2_dquot_cachep
, dquot
);
971 struct dquot_operations ocfs2_quota_operations
= {
972 .initialize
= ocfs2_dquot_initialize
,
973 .drop
= ocfs2_dquot_drop
,
974 .alloc_space
= dquot_alloc_space
,
975 .alloc_inode
= dquot_alloc_inode
,
976 .free_space
= dquot_free_space
,
977 .free_inode
= dquot_free_inode
,
978 .transfer
= dquot_transfer
,
979 .write_dquot
= ocfs2_write_dquot
,
980 .acquire_dquot
= ocfs2_acquire_dquot
,
981 .release_dquot
= ocfs2_release_dquot
,
982 .mark_dirty
= ocfs2_mark_dquot_dirty
,
983 .write_info
= ocfs2_write_info
,
984 .alloc_dquot
= ocfs2_alloc_dquot
,
985 .destroy_dquot
= ocfs2_destroy_dquot
,
988 int ocfs2_quota_setup(void)
990 ocfs2_quota_wq
= create_workqueue("o2quot");
996 void ocfs2_quota_shutdown(void)
998 if (ocfs2_quota_wq
) {
999 flush_workqueue(ocfs2_quota_wq
);
1000 destroy_workqueue(ocfs2_quota_wq
);
1001 ocfs2_quota_wq
= NULL
;