2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
11 * Quota change tags are associated with each transaction that allocates or
12 * deallocates space. Those changes are accumulated locally to each node (in a
13 * per-node file) and then are periodically synced to the quota file. This
14 * avoids the bottleneck of constantly touching the quota file, but introduces
15 * fuzziness in the current usage value of IDs that are being used on different
16 * nodes in the cluster simultaneously. So, it is possible for a user on
17 * multiple nodes to overrun their quota, but that overrun is controlable.
18 * Since quota tags are part of transactions, there is no need for a quota check
19 * program to be run on node crashes or anything like that.
21 * There are couple of knobs that let the administrator manage the quota
22 * fuzziness. "quota_quantum" sets the maximum time a quota change can be
23 * sitting on one node before being synced to the quota file. (The default is
24 * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency
25 * of quota file syncs increases as the user moves closer to their limit. The
26 * more frequent the syncs, the more accurate the quota enforcement, but that
27 * means that there is more contention between the nodes for the quota file.
28 * The default value is one. This sets the maximum theoretical quota overrun
29 * (with infinite node with infinite bandwidth) to twice the user's limit. (In
30 * practice, the maximum overrun you see should be much less.) A "quota_scale"
31 * number greater than one makes quota syncs more frequent and reduces the
32 * maximum overrun. Numbers less than one (but greater than zero) make quota
33 * syncs less frequent.
35 * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
36 * the quota file, so it is not being constantly read.
39 #include <linux/sched.h>
40 #include <linux/slab.h>
42 #include <linux/spinlock.h>
43 #include <linux/completion.h>
44 #include <linux/buffer_head.h>
45 #include <linux/sort.h>
47 #include <linux/bio.h>
48 #include <linux/gfs2_ondisk.h>
49 #include <linux/kthread.h>
50 #include <linux/freezer.h>
51 #include <linux/quota.h>
52 #include <linux/dqblk_xfs.h>
53 #include <linux/lockref.h>
54 #include <linux/list_lru.h>
70 struct gfs2_quota_change_host
{
72 u32 qc_flags
; /* GFS2_QCF_... */
76 /* Lock order: qd_lock -> qd->lockref.lock -> lru lock */
77 static DEFINE_SPINLOCK(qd_lock
);
78 struct list_lru gfs2_qd_lru
;
80 static void gfs2_qd_dispose(struct list_head
*list
)
82 struct gfs2_quota_data
*qd
;
85 while (!list_empty(list
)) {
86 qd
= list_entry(list
->next
, struct gfs2_quota_data
, qd_lru
);
87 sdp
= qd
->qd_gl
->gl_sbd
;
89 list_del(&qd
->qd_lru
);
91 /* Free from the filesystem-specific list */
93 list_del(&qd
->qd_list
);
94 spin_unlock(&qd_lock
);
96 gfs2_assert_warn(sdp
, !qd
->qd_change
);
97 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
98 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
100 gfs2_glock_put(qd
->qd_gl
);
101 atomic_dec(&sdp
->sd_quota_count
);
103 /* Delete it from the common reclaim list */
104 kmem_cache_free(gfs2_quotad_cachep
, qd
);
109 static enum lru_status
gfs2_qd_isolate(struct list_head
*item
, spinlock_t
*lock
, void *arg
)
111 struct list_head
*dispose
= arg
;
112 struct gfs2_quota_data
*qd
= list_entry(item
, struct gfs2_quota_data
, qd_lru
);
114 if (!spin_trylock(&qd
->qd_lockref
.lock
))
117 if (qd
->qd_lockref
.count
== 0) {
118 lockref_mark_dead(&qd
->qd_lockref
);
119 list_move(&qd
->qd_lru
, dispose
);
122 spin_unlock(&qd
->qd_lockref
.lock
);
126 static unsigned long gfs2_qd_shrink_scan(struct shrinker
*shrink
,
127 struct shrink_control
*sc
)
132 if (!(sc
->gfp_mask
& __GFP_FS
))
135 freed
= list_lru_walk_node(&gfs2_qd_lru
, sc
->nid
, gfs2_qd_isolate
,
136 &dispose
, &sc
->nr_to_scan
);
138 gfs2_qd_dispose(&dispose
);
143 static unsigned long gfs2_qd_shrink_count(struct shrinker
*shrink
,
144 struct shrink_control
*sc
)
146 return vfs_pressure_ratio(list_lru_count_node(&gfs2_qd_lru
, sc
->nid
));
149 struct shrinker gfs2_qd_shrinker
= {
150 .count_objects
= gfs2_qd_shrink_count
,
151 .scan_objects
= gfs2_qd_shrink_scan
,
152 .seeks
= DEFAULT_SEEKS
,
153 .flags
= SHRINKER_NUMA_AWARE
,
157 static u64
qd2index(struct gfs2_quota_data
*qd
)
159 struct kqid qid
= qd
->qd_id
;
160 return (2 * (u64
)from_kqid(&init_user_ns
, qid
)) +
161 ((qid
.type
== USRQUOTA
) ? 0 : 1);
164 static u64
qd2offset(struct gfs2_quota_data
*qd
)
168 offset
= qd2index(qd
);
169 offset
*= sizeof(struct gfs2_quota
);
174 static int qd_alloc(struct gfs2_sbd
*sdp
, struct kqid qid
,
175 struct gfs2_quota_data
**qdp
)
177 struct gfs2_quota_data
*qd
;
180 qd
= kmem_cache_zalloc(gfs2_quotad_cachep
, GFP_NOFS
);
184 qd
->qd_lockref
.count
= 1;
185 spin_lock_init(&qd
->qd_lockref
.lock
);
188 INIT_LIST_HEAD(&qd
->qd_lru
);
190 error
= gfs2_glock_get(sdp
, qd2index(qd
),
191 &gfs2_quota_glops
, CREATE
, &qd
->qd_gl
);
200 kmem_cache_free(gfs2_quotad_cachep
, qd
);
204 static int qd_get(struct gfs2_sbd
*sdp
, struct kqid qid
,
205 struct gfs2_quota_data
**qdp
)
207 struct gfs2_quota_data
*qd
= NULL
, *new_qd
= NULL
;
215 list_for_each_entry(qd
, &sdp
->sd_quota_list
, qd_list
) {
216 if (qid_eq(qd
->qd_id
, qid
) &&
217 lockref_get_not_dead(&qd
->qd_lockref
)) {
218 list_lru_del(&gfs2_qd_lru
, &qd
->qd_lru
);
229 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
230 atomic_inc(&sdp
->sd_quota_count
);
234 spin_unlock(&qd_lock
);
238 gfs2_glock_put(new_qd
->qd_gl
);
239 kmem_cache_free(gfs2_quotad_cachep
, new_qd
);
245 error
= qd_alloc(sdp
, qid
, &new_qd
);
251 static void qd_hold(struct gfs2_quota_data
*qd
)
253 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
254 gfs2_assert(sdp
, !__lockref_is_dead(&qd
->qd_lockref
));
255 lockref_get(&qd
->qd_lockref
);
258 static void qd_put(struct gfs2_quota_data
*qd
)
260 if (lockref_put_or_lock(&qd
->qd_lockref
))
263 qd
->qd_lockref
.count
= 0;
264 list_lru_add(&gfs2_qd_lru
, &qd
->qd_lru
);
265 spin_unlock(&qd
->qd_lockref
.lock
);
269 static int slot_get(struct gfs2_quota_data
*qd
)
271 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
272 unsigned int c
, o
= 0, b
;
273 unsigned char byte
= 0;
277 if (qd
->qd_slot_count
++) {
278 spin_unlock(&qd_lock
);
282 for (c
= 0; c
< sdp
->sd_quota_chunks
; c
++)
283 for (o
= 0; o
< PAGE_SIZE
; o
++) {
284 byte
= sdp
->sd_quota_bitmap
[c
][o
];
292 for (b
= 0; b
< 8; b
++)
293 if (!(byte
& (1 << b
)))
295 qd
->qd_slot
= c
* (8 * PAGE_SIZE
) + o
* 8 + b
;
297 if (qd
->qd_slot
>= sdp
->sd_quota_slots
)
300 sdp
->sd_quota_bitmap
[c
][o
] |= 1 << b
;
302 spin_unlock(&qd_lock
);
308 spin_unlock(&qd_lock
);
312 static void slot_hold(struct gfs2_quota_data
*qd
)
314 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
317 gfs2_assert(sdp
, qd
->qd_slot_count
);
319 spin_unlock(&qd_lock
);
322 static void gfs2_icbit_munge(struct gfs2_sbd
*sdp
, unsigned char **bitmap
,
323 unsigned int bit
, int new_value
)
325 unsigned int c
, o
, b
= bit
;
328 c
= b
/ (8 * PAGE_SIZE
);
333 old_value
= (bitmap
[c
][o
] & (1 << b
));
334 gfs2_assert_withdraw(sdp
, !old_value
!= !new_value
);
337 bitmap
[c
][o
] |= 1 << b
;
339 bitmap
[c
][o
] &= ~(1 << b
);
342 static void slot_put(struct gfs2_quota_data
*qd
)
344 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
347 gfs2_assert(sdp
, qd
->qd_slot_count
);
348 if (!--qd
->qd_slot_count
) {
349 gfs2_icbit_munge(sdp
, sdp
->sd_quota_bitmap
, qd
->qd_slot
, 0);
352 spin_unlock(&qd_lock
);
355 static int bh_get(struct gfs2_quota_data
*qd
)
357 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
358 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
359 unsigned int block
, offset
;
360 struct buffer_head
*bh
;
362 struct buffer_head bh_map
= { .b_state
= 0, .b_blocknr
= 0 };
364 mutex_lock(&sdp
->sd_quota_mutex
);
366 if (qd
->qd_bh_count
++) {
367 mutex_unlock(&sdp
->sd_quota_mutex
);
371 block
= qd
->qd_slot
/ sdp
->sd_qc_per_block
;
372 offset
= qd
->qd_slot
% sdp
->sd_qc_per_block
;
374 bh_map
.b_size
= 1 << ip
->i_inode
.i_blkbits
;
375 error
= gfs2_block_map(&ip
->i_inode
, block
, &bh_map
, 0);
378 error
= gfs2_meta_read(ip
->i_gl
, bh_map
.b_blocknr
, DIO_WAIT
, &bh
);
382 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
))
386 qd
->qd_bh_qc
= (struct gfs2_quota_change
*)
387 (bh
->b_data
+ sizeof(struct gfs2_meta_header
) +
388 offset
* sizeof(struct gfs2_quota_change
));
390 mutex_unlock(&sdp
->sd_quota_mutex
);
398 mutex_unlock(&sdp
->sd_quota_mutex
);
402 static void bh_put(struct gfs2_quota_data
*qd
)
404 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
406 mutex_lock(&sdp
->sd_quota_mutex
);
407 gfs2_assert(sdp
, qd
->qd_bh_count
);
408 if (!--qd
->qd_bh_count
) {
413 mutex_unlock(&sdp
->sd_quota_mutex
);
416 static int qd_check_sync(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
,
419 if (test_bit(QDF_LOCKED
, &qd
->qd_flags
) ||
420 !test_bit(QDF_CHANGE
, &qd
->qd_flags
) ||
421 (sync_gen
&& (qd
->qd_sync_gen
>= *sync_gen
)))
424 if (!lockref_get_not_dead(&qd
->qd_lockref
))
427 list_move_tail(&qd
->qd_list
, &sdp
->sd_quota_list
);
428 set_bit(QDF_LOCKED
, &qd
->qd_flags
);
429 qd
->qd_change_sync
= qd
->qd_change
;
430 gfs2_assert_warn(sdp
, qd
->qd_slot_count
);
435 static int qd_fish(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
**qdp
)
437 struct gfs2_quota_data
*qd
= NULL
;
443 if (sdp
->sd_vfs
->s_flags
& MS_RDONLY
)
448 list_for_each_entry(qd
, &sdp
->sd_quota_list
, qd_list
) {
449 found
= qd_check_sync(sdp
, qd
, &sdp
->sd_quota_sync_gen
);
457 spin_unlock(&qd_lock
);
460 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
463 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
475 static void qd_unlock(struct gfs2_quota_data
*qd
)
477 gfs2_assert_warn(qd
->qd_gl
->gl_sbd
,
478 test_bit(QDF_LOCKED
, &qd
->qd_flags
));
479 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
485 static int qdsb_get(struct gfs2_sbd
*sdp
, struct kqid qid
,
486 struct gfs2_quota_data
**qdp
)
490 error
= qd_get(sdp
, qid
, qdp
);
494 error
= slot_get(*qdp
);
498 error
= bh_get(*qdp
);
511 static void qdsb_put(struct gfs2_quota_data
*qd
)
518 int gfs2_quota_hold(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
520 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
521 struct gfs2_quota_data
**qd
;
524 if (ip
->i_res
== NULL
) {
525 error
= gfs2_rs_alloc(ip
);
530 qd
= ip
->i_res
->rs_qa_qd
;
532 if (gfs2_assert_warn(sdp
, !ip
->i_res
->rs_qa_qd_num
) ||
533 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
)))
536 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
539 error
= qdsb_get(sdp
, make_kqid_uid(ip
->i_inode
.i_uid
), qd
);
542 ip
->i_res
->rs_qa_qd_num
++;
545 error
= qdsb_get(sdp
, make_kqid_gid(ip
->i_inode
.i_gid
), qd
);
548 ip
->i_res
->rs_qa_qd_num
++;
551 if (!uid_eq(uid
, NO_UID_QUOTA_CHANGE
) &&
552 !uid_eq(uid
, ip
->i_inode
.i_uid
)) {
553 error
= qdsb_get(sdp
, make_kqid_uid(uid
), qd
);
556 ip
->i_res
->rs_qa_qd_num
++;
560 if (!gid_eq(gid
, NO_GID_QUOTA_CHANGE
) &&
561 !gid_eq(gid
, ip
->i_inode
.i_gid
)) {
562 error
= qdsb_get(sdp
, make_kqid_gid(gid
), qd
);
565 ip
->i_res
->rs_qa_qd_num
++;
571 gfs2_quota_unhold(ip
);
575 void gfs2_quota_unhold(struct gfs2_inode
*ip
)
577 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
580 if (ip
->i_res
== NULL
)
582 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
));
584 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
585 qdsb_put(ip
->i_res
->rs_qa_qd
[x
]);
586 ip
->i_res
->rs_qa_qd
[x
] = NULL
;
588 ip
->i_res
->rs_qa_qd_num
= 0;
591 static int sort_qd(const void *a
, const void *b
)
593 const struct gfs2_quota_data
*qd_a
= *(const struct gfs2_quota_data
**)a
;
594 const struct gfs2_quota_data
*qd_b
= *(const struct gfs2_quota_data
**)b
;
596 if (qid_lt(qd_a
->qd_id
, qd_b
->qd_id
))
598 if (qid_lt(qd_b
->qd_id
, qd_a
->qd_id
))
603 static void do_qc(struct gfs2_quota_data
*qd
, s64 change
)
605 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
606 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
607 struct gfs2_quota_change
*qc
= qd
->qd_bh_qc
;
610 mutex_lock(&sdp
->sd_quota_mutex
);
611 gfs2_trans_add_meta(ip
->i_gl
, qd
->qd_bh
);
613 if (!test_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
616 if (qd
->qd_id
.type
== USRQUOTA
)
617 qc
->qc_flags
= cpu_to_be32(GFS2_QCF_USER
);
618 qc
->qc_id
= cpu_to_be32(from_kqid(&init_user_ns
, qd
->qd_id
));
621 x
= be64_to_cpu(qc
->qc_change
) + change
;
622 qc
->qc_change
= cpu_to_be64(x
);
626 spin_unlock(&qd_lock
);
629 gfs2_assert_warn(sdp
, test_bit(QDF_CHANGE
, &qd
->qd_flags
));
630 clear_bit(QDF_CHANGE
, &qd
->qd_flags
);
635 } else if (!test_and_set_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
640 mutex_unlock(&sdp
->sd_quota_mutex
);
644 * gfs2_adjust_quota - adjust record of current block usage
645 * @ip: The quota inode
646 * @loc: Offset of the entry in the quota file
647 * @change: The amount of usage change to record
648 * @qd: The quota data
649 * @fdq: The updated limits to record
651 * This function was mostly borrowed from gfs2_block_truncate_page which was
652 * in turn mostly borrowed from ext3
654 * Returns: 0 or -ve on error
657 static int gfs2_adjust_quota(struct gfs2_inode
*ip
, loff_t loc
,
658 s64 change
, struct gfs2_quota_data
*qd
,
659 struct fs_disk_quota
*fdq
)
661 struct inode
*inode
= &ip
->i_inode
;
662 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
663 struct address_space
*mapping
= inode
->i_mapping
;
664 unsigned long index
= loc
>> PAGE_CACHE_SHIFT
;
665 unsigned offset
= loc
& (PAGE_CACHE_SIZE
- 1);
666 unsigned blocksize
, iblock
, pos
;
667 struct buffer_head
*bh
;
674 if (gfs2_is_stuffed(ip
)) {
675 err
= gfs2_unstuff_dinode(ip
, NULL
);
680 memset(&q
, 0, sizeof(struct gfs2_quota
));
681 err
= gfs2_internal_read(ip
, (char *)&q
, &loc
, sizeof(q
));
686 be64_add_cpu(&q
.qu_value
, change
);
687 qd
->qd_qb
.qb_value
= q
.qu_value
;
689 if (fdq
->d_fieldmask
& FS_DQ_BSOFT
) {
690 q
.qu_warn
= cpu_to_be64(fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
);
691 qd
->qd_qb
.qb_warn
= q
.qu_warn
;
693 if (fdq
->d_fieldmask
& FS_DQ_BHARD
) {
694 q
.qu_limit
= cpu_to_be64(fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
);
695 qd
->qd_qb
.qb_limit
= q
.qu_limit
;
697 if (fdq
->d_fieldmask
& FS_DQ_BCOUNT
) {
698 q
.qu_value
= cpu_to_be64(fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
);
699 qd
->qd_qb
.qb_value
= q
.qu_value
;
703 /* Write the quota into the quota file on disk */
705 nbytes
= sizeof(struct gfs2_quota
);
707 page
= find_or_create_page(mapping
, index
, GFP_NOFS
);
711 blocksize
= inode
->i_sb
->s_blocksize
;
712 iblock
= index
<< (PAGE_CACHE_SHIFT
- inode
->i_sb
->s_blocksize_bits
);
714 if (!page_has_buffers(page
))
715 create_empty_buffers(page
, blocksize
, 0);
717 bh
= page_buffers(page
);
719 while (offset
>= pos
) {
720 bh
= bh
->b_this_page
;
725 if (!buffer_mapped(bh
)) {
726 gfs2_block_map(inode
, iblock
, bh
, 1);
727 if (!buffer_mapped(bh
))
729 /* If it's a newly allocated disk block for quota, zero it */
731 zero_user(page
, pos
- blocksize
, bh
->b_size
);
734 if (PageUptodate(page
))
735 set_buffer_uptodate(bh
);
737 if (!buffer_uptodate(bh
)) {
738 ll_rw_block(READ
| REQ_META
, 1, &bh
);
740 if (!buffer_uptodate(bh
))
744 gfs2_trans_add_data(ip
->i_gl
, bh
);
746 kaddr
= kmap_atomic(page
);
747 if (offset
+ sizeof(struct gfs2_quota
) > PAGE_CACHE_SIZE
)
748 nbytes
= PAGE_CACHE_SIZE
- offset
;
749 memcpy(kaddr
+ offset
, ptr
, nbytes
);
750 flush_dcache_page(page
);
751 kunmap_atomic(kaddr
);
753 page_cache_release(page
);
755 /* If quota straddles page boundary, we need to update the rest of the
756 * quota at the beginning of the next page */
757 if ((offset
+ sizeof(struct gfs2_quota
)) > PAGE_CACHE_SIZE
) {
759 nbytes
= sizeof(struct gfs2_quota
) - nbytes
;
765 size
= loc
+ sizeof(struct gfs2_quota
);
766 if (size
> inode
->i_size
)
767 i_size_write(inode
, size
);
768 inode
->i_mtime
= inode
->i_atime
= CURRENT_TIME
;
769 mark_inode_dirty(inode
);
774 page_cache_release(page
);
778 static int do_sync(unsigned int num_qd
, struct gfs2_quota_data
**qda
)
780 struct gfs2_sbd
*sdp
= (*qda
)->qd_gl
->gl_sbd
;
781 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
782 struct gfs2_alloc_parms ap
= { .aflags
= 0, };
783 unsigned int data_blocks
, ind_blocks
;
784 struct gfs2_holder
*ghs
, i_gh
;
786 struct gfs2_quota_data
*qd
;
789 unsigned int nalloc
= 0, blocks
;
792 error
= gfs2_rs_alloc(ip
);
796 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
797 &data_blocks
, &ind_blocks
);
799 ghs
= kcalloc(num_qd
, sizeof(struct gfs2_holder
), GFP_NOFS
);
803 sort(qda
, num_qd
, sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
804 mutex_lock(&ip
->i_inode
.i_mutex
);
805 for (qx
= 0; qx
< num_qd
; qx
++) {
806 error
= gfs2_glock_nq_init(qda
[qx
]->qd_gl
, LM_ST_EXCLUSIVE
,
807 GL_NOCACHE
, &ghs
[qx
]);
812 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
816 for (x
= 0; x
< num_qd
; x
++) {
817 offset
= qd2offset(qda
[x
]);
818 if (gfs2_write_alloc_required(ip
, offset
,
819 sizeof(struct gfs2_quota
)))
824 * 1 blk for unstuffing inode if stuffed. We add this extra
825 * block to the reservation unconditionally. If the inode
826 * doesn't need unstuffing, the block will be released to the
827 * rgrp since it won't be allocated during the transaction
829 /* +3 in the end for unstuffing block, inode size update block
830 * and another block in case quota straddles page boundary and
831 * two blocks need to be updated instead of 1 */
832 blocks
= num_qd
* data_blocks
+ RES_DINODE
+ num_qd
+ 3;
834 reserved
= 1 + (nalloc
* (data_blocks
+ ind_blocks
));
835 ap
.target
= reserved
;
836 error
= gfs2_inplace_reserve(ip
, &ap
);
841 blocks
+= gfs2_rg_blocks(ip
, reserved
) + nalloc
* ind_blocks
+ RES_STATFS
;
843 error
= gfs2_trans_begin(sdp
, blocks
, 0);
847 for (x
= 0; x
< num_qd
; x
++) {
849 offset
= qd2offset(qd
);
850 error
= gfs2_adjust_quota(ip
, offset
, qd
->qd_change_sync
, qd
, NULL
);
854 do_qc(qd
, -qd
->qd_change_sync
);
855 set_bit(QDF_REFRESH
, &qd
->qd_flags
);
863 gfs2_inplace_release(ip
);
865 gfs2_glock_dq_uninit(&i_gh
);
868 gfs2_glock_dq_uninit(&ghs
[qx
]);
869 mutex_unlock(&ip
->i_inode
.i_mutex
);
871 gfs2_log_flush(ip
->i_gl
->gl_sbd
, ip
->i_gl
);
875 static int update_qd(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
)
877 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
879 struct gfs2_quota_lvb
*qlvb
;
883 memset(&q
, 0, sizeof(struct gfs2_quota
));
885 error
= gfs2_internal_read(ip
, (char *)&q
, &pos
, sizeof(q
));
889 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
890 qlvb
->qb_magic
= cpu_to_be32(GFS2_MAGIC
);
892 qlvb
->qb_limit
= q
.qu_limit
;
893 qlvb
->qb_warn
= q
.qu_warn
;
894 qlvb
->qb_value
= q
.qu_value
;
900 static int do_glock(struct gfs2_quota_data
*qd
, int force_refresh
,
901 struct gfs2_holder
*q_gh
)
903 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
904 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
905 struct gfs2_holder i_gh
;
909 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_SHARED
, 0, q_gh
);
913 qd
->qd_qb
= *(struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
915 if (force_refresh
|| qd
->qd_qb
.qb_magic
!= cpu_to_be32(GFS2_MAGIC
)) {
916 gfs2_glock_dq_uninit(q_gh
);
917 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
,
922 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
926 error
= update_qd(sdp
, qd
);
930 gfs2_glock_dq_uninit(&i_gh
);
931 gfs2_glock_dq_uninit(q_gh
);
939 gfs2_glock_dq_uninit(&i_gh
);
941 gfs2_glock_dq_uninit(q_gh
);
945 int gfs2_quota_lock(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
947 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
948 struct gfs2_quota_data
*qd
;
952 error
= gfs2_quota_hold(ip
, uid
, gid
);
956 if (capable(CAP_SYS_RESOURCE
) ||
957 sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
960 sort(ip
->i_res
->rs_qa_qd
, ip
->i_res
->rs_qa_qd_num
,
961 sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
963 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
964 int force
= NO_FORCE
;
965 qd
= ip
->i_res
->rs_qa_qd
[x
];
966 if (test_and_clear_bit(QDF_REFRESH
, &qd
->qd_flags
))
968 error
= do_glock(qd
, force
, &ip
->i_res
->rs_qa_qd_ghs
[x
]);
974 set_bit(GIF_QD_LOCKED
, &ip
->i_flags
);
977 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
978 gfs2_quota_unhold(ip
);
984 static int need_sync(struct gfs2_quota_data
*qd
)
986 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
987 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
989 unsigned int num
, den
;
992 if (!qd
->qd_qb
.qb_limit
)
996 value
= qd
->qd_change
;
997 spin_unlock(&qd_lock
);
999 spin_lock(>
->gt_spin
);
1000 num
= gt
->gt_quota_scale_num
;
1001 den
= gt
->gt_quota_scale_den
;
1002 spin_unlock(>
->gt_spin
);
1006 else if ((s64
)be64_to_cpu(qd
->qd_qb
.qb_value
) >=
1007 (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1010 value
*= gfs2_jindex_size(sdp
) * num
;
1011 value
= div_s64(value
, den
);
1012 value
+= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1013 if (value
< (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1020 void gfs2_quota_unlock(struct gfs2_inode
*ip
)
1022 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1023 struct gfs2_quota_data
*qda
[4];
1024 unsigned int count
= 0;
1028 if (!test_and_clear_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1031 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1032 struct gfs2_quota_data
*qd
;
1035 qd
= ip
->i_res
->rs_qa_qd
[x
];
1036 sync
= need_sync(qd
);
1038 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
1042 spin_lock(&qd_lock
);
1043 found
= qd_check_sync(sdp
, qd
, NULL
);
1044 spin_unlock(&qd_lock
);
1049 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
1051 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
1061 do_sync(count
, qda
);
1062 for (x
= 0; x
< count
; x
++)
1067 gfs2_quota_unhold(ip
);
1070 #define MAX_LINE 256
1072 static int print_message(struct gfs2_quota_data
*qd
, char *type
)
1074 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
1076 printk(KERN_INFO
"GFS2: fsid=%s: quota %s for %s %u\n",
1077 sdp
->sd_fsname
, type
,
1078 (qd
->qd_id
.type
== USRQUOTA
) ? "user" : "group",
1079 from_kqid(&init_user_ns
, qd
->qd_id
));
1084 int gfs2_quota_check(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
1086 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1087 struct gfs2_quota_data
*qd
;
1092 if (!test_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1095 if (sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
1098 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1099 qd
= ip
->i_res
->rs_qa_qd
[x
];
1101 if (!(qid_eq(qd
->qd_id
, make_kqid_uid(uid
)) ||
1102 qid_eq(qd
->qd_id
, make_kqid_gid(gid
))))
1105 value
= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1106 spin_lock(&qd_lock
);
1107 value
+= qd
->qd_change
;
1108 spin_unlock(&qd_lock
);
1110 if (be64_to_cpu(qd
->qd_qb
.qb_limit
) && (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
) < value
) {
1111 print_message(qd
, "exceeded");
1112 quota_send_warning(qd
->qd_id
,
1113 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BHARDWARN
);
1117 } else if (be64_to_cpu(qd
->qd_qb
.qb_warn
) &&
1118 (s64
)be64_to_cpu(qd
->qd_qb
.qb_warn
) < value
&&
1119 time_after_eq(jiffies
, qd
->qd_last_warn
+
1121 gt_quota_warn_period
) * HZ
)) {
1122 quota_send_warning(qd
->qd_id
,
1123 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BSOFTWARN
);
1124 error
= print_message(qd
, "warning");
1125 qd
->qd_last_warn
= jiffies
;
1132 void gfs2_quota_change(struct gfs2_inode
*ip
, s64 change
,
1133 kuid_t uid
, kgid_t gid
)
1135 struct gfs2_quota_data
*qd
;
1138 if (gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), change
))
1140 if (ip
->i_diskflags
& GFS2_DIF_SYSTEM
)
1143 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1144 qd
= ip
->i_res
->rs_qa_qd
[x
];
1146 if (qid_eq(qd
->qd_id
, make_kqid_uid(uid
)) ||
1147 qid_eq(qd
->qd_id
, make_kqid_gid(gid
))) {
1153 int gfs2_quota_sync(struct super_block
*sb
, int type
)
1155 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1156 struct gfs2_quota_data
**qda
;
1157 unsigned int max_qd
= PAGE_SIZE
/sizeof(struct gfs2_holder
);
1158 unsigned int num_qd
;
1162 qda
= kcalloc(max_qd
, sizeof(struct gfs2_quota_data
*), GFP_KERNEL
);
1166 mutex_lock(&sdp
->sd_quota_sync_mutex
);
1167 sdp
->sd_quota_sync_gen
++;
1173 error
= qd_fish(sdp
, qda
+ num_qd
);
1174 if (error
|| !qda
[num_qd
])
1176 if (++num_qd
== max_qd
)
1182 error
= do_sync(num_qd
, qda
);
1184 for (x
= 0; x
< num_qd
; x
++)
1185 qda
[x
]->qd_sync_gen
=
1186 sdp
->sd_quota_sync_gen
;
1188 for (x
= 0; x
< num_qd
; x
++)
1191 } while (!error
&& num_qd
== max_qd
);
1193 mutex_unlock(&sdp
->sd_quota_sync_mutex
);
1199 int gfs2_quota_refresh(struct gfs2_sbd
*sdp
, struct kqid qid
)
1201 struct gfs2_quota_data
*qd
;
1202 struct gfs2_holder q_gh
;
1205 error
= qd_get(sdp
, qid
, &qd
);
1209 error
= do_glock(qd
, FORCE
, &q_gh
);
1211 gfs2_glock_dq_uninit(&q_gh
);
1217 static void gfs2_quota_change_in(struct gfs2_quota_change_host
*qc
, const void *buf
)
1219 const struct gfs2_quota_change
*str
= buf
;
1221 qc
->qc_change
= be64_to_cpu(str
->qc_change
);
1222 qc
->qc_flags
= be32_to_cpu(str
->qc_flags
);
1223 qc
->qc_id
= make_kqid(&init_user_ns
,
1224 (qc
->qc_flags
& GFS2_QCF_USER
)?USRQUOTA
:GRPQUOTA
,
1225 be32_to_cpu(str
->qc_id
));
1228 int gfs2_quota_init(struct gfs2_sbd
*sdp
)
1230 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
1231 u64 size
= i_size_read(sdp
->sd_qc_inode
);
1232 unsigned int blocks
= size
>> sdp
->sd_sb
.sb_bsize_shift
;
1233 unsigned int x
, slot
= 0;
1234 unsigned int found
= 0;
1239 if (gfs2_check_internal_file_size(sdp
->sd_qc_inode
, 1, 64 << 20))
1242 sdp
->sd_quota_slots
= blocks
* sdp
->sd_qc_per_block
;
1243 sdp
->sd_quota_chunks
= DIV_ROUND_UP(sdp
->sd_quota_slots
, 8 * PAGE_SIZE
);
1247 sdp
->sd_quota_bitmap
= kcalloc(sdp
->sd_quota_chunks
,
1248 sizeof(unsigned char *), GFP_NOFS
);
1249 if (!sdp
->sd_quota_bitmap
)
1252 for (x
= 0; x
< sdp
->sd_quota_chunks
; x
++) {
1253 sdp
->sd_quota_bitmap
[x
] = kzalloc(PAGE_SIZE
, GFP_NOFS
);
1254 if (!sdp
->sd_quota_bitmap
[x
])
1258 for (x
= 0; x
< blocks
; x
++) {
1259 struct buffer_head
*bh
;
1264 error
= gfs2_extent_map(&ip
->i_inode
, x
, &new, &dblock
, &extlen
);
1269 bh
= gfs2_meta_ra(ip
->i_gl
, dblock
, extlen
);
1272 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
)) {
1277 for (y
= 0; y
< sdp
->sd_qc_per_block
&& slot
< sdp
->sd_quota_slots
;
1279 struct gfs2_quota_change_host qc
;
1280 struct gfs2_quota_data
*qd
;
1282 gfs2_quota_change_in(&qc
, bh
->b_data
+
1283 sizeof(struct gfs2_meta_header
) +
1284 y
* sizeof(struct gfs2_quota_change
));
1288 error
= qd_alloc(sdp
, qc
.qc_id
, &qd
);
1294 set_bit(QDF_CHANGE
, &qd
->qd_flags
);
1295 qd
->qd_change
= qc
.qc_change
;
1297 qd
->qd_slot_count
= 1;
1299 spin_lock(&qd_lock
);
1300 gfs2_icbit_munge(sdp
, sdp
->sd_quota_bitmap
, slot
, 1);
1301 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
1302 atomic_inc(&sdp
->sd_quota_count
);
1303 spin_unlock(&qd_lock
);
1314 fs_info(sdp
, "found %u quota changes\n", found
);
1319 gfs2_quota_cleanup(sdp
);
1323 void gfs2_quota_cleanup(struct gfs2_sbd
*sdp
)
1325 struct list_head
*head
= &sdp
->sd_quota_list
;
1326 struct gfs2_quota_data
*qd
;
1329 spin_lock(&qd_lock
);
1330 while (!list_empty(head
)) {
1331 qd
= list_entry(head
->prev
, struct gfs2_quota_data
, qd_list
);
1334 * To be removed in due course... we should be able to
1335 * ensure that all refs to the qd have done by this point
1336 * so that this rather odd test is not required
1338 spin_lock(&qd
->qd_lockref
.lock
);
1339 if (qd
->qd_lockref
.count
> 1 ||
1340 (qd
->qd_lockref
.count
&& !test_bit(QDF_CHANGE
, &qd
->qd_flags
))) {
1341 spin_unlock(&qd
->qd_lockref
.lock
);
1342 list_move(&qd
->qd_list
, head
);
1343 spin_unlock(&qd_lock
);
1345 spin_lock(&qd_lock
);
1348 spin_unlock(&qd
->qd_lockref
.lock
);
1350 list_del(&qd
->qd_list
);
1351 /* Also remove if this qd exists in the reclaim list */
1352 list_lru_del(&gfs2_qd_lru
, &qd
->qd_lru
);
1353 atomic_dec(&sdp
->sd_quota_count
);
1354 spin_unlock(&qd_lock
);
1356 if (!qd
->qd_lockref
.count
) {
1357 gfs2_assert_warn(sdp
, !qd
->qd_change
);
1358 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
1360 gfs2_assert_warn(sdp
, qd
->qd_slot_count
== 1);
1361 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
1363 gfs2_glock_put(qd
->qd_gl
);
1364 kmem_cache_free(gfs2_quotad_cachep
, qd
);
1366 spin_lock(&qd_lock
);
1368 spin_unlock(&qd_lock
);
1370 gfs2_assert_warn(sdp
, !atomic_read(&sdp
->sd_quota_count
));
1372 if (sdp
->sd_quota_bitmap
) {
1373 for (x
= 0; x
< sdp
->sd_quota_chunks
; x
++)
1374 kfree(sdp
->sd_quota_bitmap
[x
]);
1375 kfree(sdp
->sd_quota_bitmap
);
1379 static void quotad_error(struct gfs2_sbd
*sdp
, const char *msg
, int error
)
1381 if (error
== 0 || error
== -EROFS
)
1383 if (!test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
))
1384 fs_err(sdp
, "gfs2_quotad: %s error %d\n", msg
, error
);
1387 static void quotad_check_timeo(struct gfs2_sbd
*sdp
, const char *msg
,
1388 int (*fxn
)(struct super_block
*sb
, int type
),
1389 unsigned long t
, unsigned long *timeo
,
1390 unsigned int *new_timeo
)
1393 int error
= fxn(sdp
->sd_vfs
, 0);
1394 quotad_error(sdp
, msg
, error
);
1395 *timeo
= gfs2_tune_get_i(&sdp
->sd_tune
, new_timeo
) * HZ
;
1401 static void quotad_check_trunc_list(struct gfs2_sbd
*sdp
)
1403 struct gfs2_inode
*ip
;
1407 spin_lock(&sdp
->sd_trunc_lock
);
1408 if (!list_empty(&sdp
->sd_trunc_list
)) {
1409 ip
= list_entry(sdp
->sd_trunc_list
.next
,
1410 struct gfs2_inode
, i_trunc_list
);
1411 list_del_init(&ip
->i_trunc_list
);
1413 spin_unlock(&sdp
->sd_trunc_lock
);
1416 gfs2_glock_finish_truncate(ip
);
1420 void gfs2_wake_up_statfs(struct gfs2_sbd
*sdp
) {
1421 if (!sdp
->sd_statfs_force_sync
) {
1422 sdp
->sd_statfs_force_sync
= 1;
1423 wake_up(&sdp
->sd_quota_wait
);
1429 * gfs2_quotad - Write cached quota changes into the quota file
1430 * @sdp: Pointer to GFS2 superblock
1434 int gfs2_quotad(void *data
)
1436 struct gfs2_sbd
*sdp
= data
;
1437 struct gfs2_tune
*tune
= &sdp
->sd_tune
;
1438 unsigned long statfs_timeo
= 0;
1439 unsigned long quotad_timeo
= 0;
1440 unsigned long t
= 0;
1444 while (!kthread_should_stop()) {
1446 /* Update the master statfs file */
1447 if (sdp
->sd_statfs_force_sync
) {
1448 int error
= gfs2_statfs_sync(sdp
->sd_vfs
, 0);
1449 quotad_error(sdp
, "statfs", error
);
1450 statfs_timeo
= gfs2_tune_get(sdp
, gt_statfs_quantum
) * HZ
;
1453 quotad_check_timeo(sdp
, "statfs", gfs2_statfs_sync
, t
,
1455 &tune
->gt_statfs_quantum
);
1457 /* Update quota file */
1458 quotad_check_timeo(sdp
, "sync", gfs2_quota_sync
, t
,
1459 "ad_timeo
, &tune
->gt_quota_quantum
);
1461 /* Check for & recover partially truncated inodes */
1462 quotad_check_trunc_list(sdp
);
1466 t
= min(quotad_timeo
, statfs_timeo
);
1468 prepare_to_wait(&sdp
->sd_quota_wait
, &wait
, TASK_INTERRUPTIBLE
);
1469 spin_lock(&sdp
->sd_trunc_lock
);
1470 empty
= list_empty(&sdp
->sd_trunc_list
);
1471 spin_unlock(&sdp
->sd_trunc_lock
);
1472 if (empty
&& !sdp
->sd_statfs_force_sync
)
1473 t
-= schedule_timeout(t
);
1476 finish_wait(&sdp
->sd_quota_wait
, &wait
);
1482 static int gfs2_quota_get_xstate(struct super_block
*sb
,
1483 struct fs_quota_stat
*fqs
)
1485 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1487 memset(fqs
, 0, sizeof(struct fs_quota_stat
));
1488 fqs
->qs_version
= FS_QSTAT_VERSION
;
1490 switch (sdp
->sd_args
.ar_quota
) {
1492 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ENFD
| FS_QUOTA_GDQ_ENFD
);
1494 case GFS2_QUOTA_ACCOUNT
:
1495 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ACCT
| FS_QUOTA_GDQ_ACCT
);
1497 case GFS2_QUOTA_OFF
:
1501 if (sdp
->sd_quota_inode
) {
1502 fqs
->qs_uquota
.qfs_ino
= GFS2_I(sdp
->sd_quota_inode
)->i_no_addr
;
1503 fqs
->qs_uquota
.qfs_nblks
= sdp
->sd_quota_inode
->i_blocks
;
1505 fqs
->qs_uquota
.qfs_nextents
= 1; /* unsupported */
1506 fqs
->qs_gquota
= fqs
->qs_uquota
; /* its the same inode in both cases */
1507 fqs
->qs_incoredqs
= list_lru_count(&gfs2_qd_lru
);
1511 static int gfs2_get_dqblk(struct super_block
*sb
, struct kqid qid
,
1512 struct fs_disk_quota
*fdq
)
1514 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1515 struct gfs2_quota_lvb
*qlvb
;
1516 struct gfs2_quota_data
*qd
;
1517 struct gfs2_holder q_gh
;
1520 memset(fdq
, 0, sizeof(struct fs_disk_quota
));
1522 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1523 return -ESRCH
; /* Crazy XFS error code */
1525 if ((qid
.type
!= USRQUOTA
) &&
1526 (qid
.type
!= GRPQUOTA
))
1529 error
= qd_get(sdp
, qid
, &qd
);
1532 error
= do_glock(qd
, FORCE
, &q_gh
);
1536 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
1537 fdq
->d_version
= FS_DQUOT_VERSION
;
1538 fdq
->d_flags
= (qid
.type
== USRQUOTA
) ? FS_USER_QUOTA
: FS_GROUP_QUOTA
;
1539 fdq
->d_id
= from_kqid_munged(current_user_ns(), qid
);
1540 fdq
->d_blk_hardlimit
= be64_to_cpu(qlvb
->qb_limit
) << sdp
->sd_fsb2bb_shift
;
1541 fdq
->d_blk_softlimit
= be64_to_cpu(qlvb
->qb_warn
) << sdp
->sd_fsb2bb_shift
;
1542 fdq
->d_bcount
= be64_to_cpu(qlvb
->qb_value
) << sdp
->sd_fsb2bb_shift
;
1544 gfs2_glock_dq_uninit(&q_gh
);
1550 /* GFS2 only supports a subset of the XFS fields */
1551 #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
1553 static int gfs2_set_dqblk(struct super_block
*sb
, struct kqid qid
,
1554 struct fs_disk_quota
*fdq
)
1556 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1557 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
1558 struct gfs2_quota_data
*qd
;
1559 struct gfs2_holder q_gh
, i_gh
;
1560 unsigned int data_blocks
, ind_blocks
;
1561 unsigned int blocks
= 0;
1566 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1567 return -ESRCH
; /* Crazy XFS error code */
1569 if ((qid
.type
!= USRQUOTA
) &&
1570 (qid
.type
!= GRPQUOTA
))
1573 if (fdq
->d_fieldmask
& ~GFS2_FIELDMASK
)
1576 error
= qd_get(sdp
, qid
, &qd
);
1580 error
= gfs2_rs_alloc(ip
);
1584 mutex_lock(&ip
->i_inode
.i_mutex
);
1585 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
, 0, &q_gh
);
1588 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1592 /* Check for existing entry, if none then alloc new blocks */
1593 error
= update_qd(sdp
, qd
);
1597 /* If nothing has changed, this is a no-op */
1598 if ((fdq
->d_fieldmask
& FS_DQ_BSOFT
) &&
1599 ((fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_warn
)))
1600 fdq
->d_fieldmask
^= FS_DQ_BSOFT
;
1602 if ((fdq
->d_fieldmask
& FS_DQ_BHARD
) &&
1603 ((fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_limit
)))
1604 fdq
->d_fieldmask
^= FS_DQ_BHARD
;
1606 if ((fdq
->d_fieldmask
& FS_DQ_BCOUNT
) &&
1607 ((fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_value
)))
1608 fdq
->d_fieldmask
^= FS_DQ_BCOUNT
;
1610 if (fdq
->d_fieldmask
== 0)
1613 offset
= qd2offset(qd
);
1614 alloc_required
= gfs2_write_alloc_required(ip
, offset
, sizeof(struct gfs2_quota
));
1615 if (gfs2_is_stuffed(ip
))
1617 if (alloc_required
) {
1618 struct gfs2_alloc_parms ap
= { .aflags
= 0, };
1619 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
1620 &data_blocks
, &ind_blocks
);
1621 blocks
= 1 + data_blocks
+ ind_blocks
;
1623 error
= gfs2_inplace_reserve(ip
, &ap
);
1626 blocks
+= gfs2_rg_blocks(ip
, blocks
);
1629 /* Some quotas span block boundaries and can update two blocks,
1630 adding an extra block to the transaction to handle such quotas */
1631 error
= gfs2_trans_begin(sdp
, blocks
+ RES_DINODE
+ 2, 0);
1636 error
= gfs2_adjust_quota(ip
, offset
, 0, qd
, fdq
);
1638 gfs2_trans_end(sdp
);
1641 gfs2_inplace_release(ip
);
1643 gfs2_glock_dq_uninit(&i_gh
);
1645 gfs2_glock_dq_uninit(&q_gh
);
1647 mutex_unlock(&ip
->i_inode
.i_mutex
);
1653 const struct quotactl_ops gfs2_quotactl_ops
= {
1654 .quota_sync
= gfs2_quota_sync
,
1655 .get_xstate
= gfs2_quota_get_xstate
,
1656 .get_dqblk
= gfs2_get_dqblk
,
1657 .set_dqblk
= gfs2_set_dqblk
,