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>
71 struct gfs2_quota_change_host
{
73 u32 qc_flags
; /* GFS2_QCF_... */
77 static LIST_HEAD(qd_lru_list
);
78 static atomic_t qd_lru_count
= ATOMIC_INIT(0);
79 static DEFINE_SPINLOCK(qd_lru_lock
);
81 int gfs2_shrink_qd_memory(struct shrinker
*shrink
, struct shrink_control
*sc
)
83 struct gfs2_quota_data
*qd
;
85 int nr_to_scan
= sc
->nr_to_scan
;
90 if (!(sc
->gfp_mask
& __GFP_FS
))
93 spin_lock(&qd_lru_lock
);
94 while (nr_to_scan
&& !list_empty(&qd_lru_list
)) {
95 qd
= list_entry(qd_lru_list
.next
,
96 struct gfs2_quota_data
, qd_reclaim
);
97 sdp
= qd
->qd_gl
->gl_sbd
;
99 /* Free from the filesystem-specific list */
100 list_del(&qd
->qd_list
);
102 gfs2_assert_warn(sdp
, !qd
->qd_change
);
103 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
104 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
106 gfs2_glock_put(qd
->qd_gl
);
107 atomic_dec(&sdp
->sd_quota_count
);
109 /* Delete it from the common reclaim list */
110 list_del_init(&qd
->qd_reclaim
);
111 atomic_dec(&qd_lru_count
);
112 spin_unlock(&qd_lru_lock
);
113 kmem_cache_free(gfs2_quotad_cachep
, qd
);
114 spin_lock(&qd_lru_lock
);
117 spin_unlock(&qd_lru_lock
);
120 return (atomic_read(&qd_lru_count
) * sysctl_vfs_cache_pressure
) / 100;
123 static u64
qd2offset(struct gfs2_quota_data
*qd
)
127 offset
= 2 * (u64
)qd
->qd_id
+ !test_bit(QDF_USER
, &qd
->qd_flags
);
128 offset
*= sizeof(struct gfs2_quota
);
133 static int qd_alloc(struct gfs2_sbd
*sdp
, int user
, u32 id
,
134 struct gfs2_quota_data
**qdp
)
136 struct gfs2_quota_data
*qd
;
139 qd
= kmem_cache_zalloc(gfs2_quotad_cachep
, GFP_NOFS
);
143 atomic_set(&qd
->qd_count
, 1);
146 set_bit(QDF_USER
, &qd
->qd_flags
);
148 INIT_LIST_HEAD(&qd
->qd_reclaim
);
150 error
= gfs2_glock_get(sdp
, 2 * (u64
)id
+ !user
,
151 &gfs2_quota_glops
, CREATE
, &qd
->qd_gl
);
160 kmem_cache_free(gfs2_quotad_cachep
, qd
);
164 static int qd_get(struct gfs2_sbd
*sdp
, int user
, u32 id
,
165 struct gfs2_quota_data
**qdp
)
167 struct gfs2_quota_data
*qd
= NULL
, *new_qd
= NULL
;
174 spin_lock(&qd_lru_lock
);
175 list_for_each_entry(qd
, &sdp
->sd_quota_list
, qd_list
) {
176 if (qd
->qd_id
== id
&&
177 !test_bit(QDF_USER
, &qd
->qd_flags
) == !user
) {
178 if (!atomic_read(&qd
->qd_count
) &&
179 !list_empty(&qd
->qd_reclaim
)) {
180 /* Remove it from reclaim list */
181 list_del_init(&qd
->qd_reclaim
);
182 atomic_dec(&qd_lru_count
);
184 atomic_inc(&qd
->qd_count
);
195 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
196 atomic_inc(&sdp
->sd_quota_count
);
200 spin_unlock(&qd_lru_lock
);
204 gfs2_glock_put(new_qd
->qd_gl
);
205 kmem_cache_free(gfs2_quotad_cachep
, new_qd
);
211 error
= qd_alloc(sdp
, user
, id
, &new_qd
);
217 static void qd_hold(struct gfs2_quota_data
*qd
)
219 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
220 gfs2_assert(sdp
, atomic_read(&qd
->qd_count
));
221 atomic_inc(&qd
->qd_count
);
224 static void qd_put(struct gfs2_quota_data
*qd
)
226 if (atomic_dec_and_lock(&qd
->qd_count
, &qd_lru_lock
)) {
227 /* Add to the reclaim list */
228 list_add_tail(&qd
->qd_reclaim
, &qd_lru_list
);
229 atomic_inc(&qd_lru_count
);
230 spin_unlock(&qd_lru_lock
);
234 static int slot_get(struct gfs2_quota_data
*qd
)
236 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
237 unsigned int c
, o
= 0, b
;
238 unsigned char byte
= 0;
240 spin_lock(&qd_lru_lock
);
242 if (qd
->qd_slot_count
++) {
243 spin_unlock(&qd_lru_lock
);
247 for (c
= 0; c
< sdp
->sd_quota_chunks
; c
++)
248 for (o
= 0; o
< PAGE_SIZE
; o
++) {
249 byte
= sdp
->sd_quota_bitmap
[c
][o
];
257 for (b
= 0; b
< 8; b
++)
258 if (!(byte
& (1 << b
)))
260 qd
->qd_slot
= c
* (8 * PAGE_SIZE
) + o
* 8 + b
;
262 if (qd
->qd_slot
>= sdp
->sd_quota_slots
)
265 sdp
->sd_quota_bitmap
[c
][o
] |= 1 << b
;
267 spin_unlock(&qd_lru_lock
);
273 spin_unlock(&qd_lru_lock
);
277 static void slot_hold(struct gfs2_quota_data
*qd
)
279 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
281 spin_lock(&qd_lru_lock
);
282 gfs2_assert(sdp
, qd
->qd_slot_count
);
284 spin_unlock(&qd_lru_lock
);
287 static void slot_put(struct gfs2_quota_data
*qd
)
289 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
291 spin_lock(&qd_lru_lock
);
292 gfs2_assert(sdp
, qd
->qd_slot_count
);
293 if (!--qd
->qd_slot_count
) {
294 gfs2_icbit_munge(sdp
, sdp
->sd_quota_bitmap
, qd
->qd_slot
, 0);
297 spin_unlock(&qd_lru_lock
);
300 static int bh_get(struct gfs2_quota_data
*qd
)
302 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
303 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
304 unsigned int block
, offset
;
305 struct buffer_head
*bh
;
307 struct buffer_head bh_map
= { .b_state
= 0, .b_blocknr
= 0 };
309 mutex_lock(&sdp
->sd_quota_mutex
);
311 if (qd
->qd_bh_count
++) {
312 mutex_unlock(&sdp
->sd_quota_mutex
);
316 block
= qd
->qd_slot
/ sdp
->sd_qc_per_block
;
317 offset
= qd
->qd_slot
% sdp
->sd_qc_per_block
;
319 bh_map
.b_size
= 1 << ip
->i_inode
.i_blkbits
;
320 error
= gfs2_block_map(&ip
->i_inode
, block
, &bh_map
, 0);
323 error
= gfs2_meta_read(ip
->i_gl
, bh_map
.b_blocknr
, DIO_WAIT
, &bh
);
327 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
))
331 qd
->qd_bh_qc
= (struct gfs2_quota_change
*)
332 (bh
->b_data
+ sizeof(struct gfs2_meta_header
) +
333 offset
* sizeof(struct gfs2_quota_change
));
335 mutex_unlock(&sdp
->sd_quota_mutex
);
343 mutex_unlock(&sdp
->sd_quota_mutex
);
347 static void bh_put(struct gfs2_quota_data
*qd
)
349 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
351 mutex_lock(&sdp
->sd_quota_mutex
);
352 gfs2_assert(sdp
, qd
->qd_bh_count
);
353 if (!--qd
->qd_bh_count
) {
358 mutex_unlock(&sdp
->sd_quota_mutex
);
361 static int qd_fish(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
**qdp
)
363 struct gfs2_quota_data
*qd
= NULL
;
369 if (sdp
->sd_vfs
->s_flags
& MS_RDONLY
)
372 spin_lock(&qd_lru_lock
);
374 list_for_each_entry(qd
, &sdp
->sd_quota_list
, qd_list
) {
375 if (test_bit(QDF_LOCKED
, &qd
->qd_flags
) ||
376 !test_bit(QDF_CHANGE
, &qd
->qd_flags
) ||
377 qd
->qd_sync_gen
>= sdp
->sd_quota_sync_gen
)
380 list_move_tail(&qd
->qd_list
, &sdp
->sd_quota_list
);
382 set_bit(QDF_LOCKED
, &qd
->qd_flags
);
383 gfs2_assert_warn(sdp
, atomic_read(&qd
->qd_count
));
384 atomic_inc(&qd
->qd_count
);
385 qd
->qd_change_sync
= qd
->qd_change
;
386 gfs2_assert_warn(sdp
, qd
->qd_slot_count
);
396 spin_unlock(&qd_lru_lock
);
399 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
402 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
414 static int qd_trylock(struct gfs2_quota_data
*qd
)
416 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
418 if (sdp
->sd_vfs
->s_flags
& MS_RDONLY
)
421 spin_lock(&qd_lru_lock
);
423 if (test_bit(QDF_LOCKED
, &qd
->qd_flags
) ||
424 !test_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
425 spin_unlock(&qd_lru_lock
);
429 list_move_tail(&qd
->qd_list
, &sdp
->sd_quota_list
);
431 set_bit(QDF_LOCKED
, &qd
->qd_flags
);
432 gfs2_assert_warn(sdp
, atomic_read(&qd
->qd_count
));
433 atomic_inc(&qd
->qd_count
);
434 qd
->qd_change_sync
= qd
->qd_change
;
435 gfs2_assert_warn(sdp
, qd
->qd_slot_count
);
438 spin_unlock(&qd_lru_lock
);
440 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
442 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
451 static void qd_unlock(struct gfs2_quota_data
*qd
)
453 gfs2_assert_warn(qd
->qd_gl
->gl_sbd
,
454 test_bit(QDF_LOCKED
, &qd
->qd_flags
));
455 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
461 static int qdsb_get(struct gfs2_sbd
*sdp
, int user
, u32 id
,
462 struct gfs2_quota_data
**qdp
)
466 error
= qd_get(sdp
, user
, id
, qdp
);
470 error
= slot_get(*qdp
);
474 error
= bh_get(*qdp
);
487 static void qdsb_put(struct gfs2_quota_data
*qd
)
494 int gfs2_quota_hold(struct gfs2_inode
*ip
, u32 uid
, u32 gid
)
496 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
497 struct gfs2_alloc
*al
= ip
->i_alloc
;
498 struct gfs2_quota_data
**qd
= al
->al_qd
;
501 if (gfs2_assert_warn(sdp
, !al
->al_qd_num
) ||
502 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
)))
505 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
508 error
= qdsb_get(sdp
, QUOTA_USER
, ip
->i_inode
.i_uid
, qd
);
514 error
= qdsb_get(sdp
, QUOTA_GROUP
, ip
->i_inode
.i_gid
, qd
);
520 if (uid
!= NO_QUOTA_CHANGE
&& uid
!= ip
->i_inode
.i_uid
) {
521 error
= qdsb_get(sdp
, QUOTA_USER
, uid
, qd
);
528 if (gid
!= NO_QUOTA_CHANGE
&& gid
!= ip
->i_inode
.i_gid
) {
529 error
= qdsb_get(sdp
, QUOTA_GROUP
, gid
, qd
);
538 gfs2_quota_unhold(ip
);
542 void gfs2_quota_unhold(struct gfs2_inode
*ip
)
544 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
545 struct gfs2_alloc
*al
= ip
->i_alloc
;
548 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
));
550 for (x
= 0; x
< al
->al_qd_num
; x
++) {
551 qdsb_put(al
->al_qd
[x
]);
557 static int sort_qd(const void *a
, const void *b
)
559 const struct gfs2_quota_data
*qd_a
= *(const struct gfs2_quota_data
**)a
;
560 const struct gfs2_quota_data
*qd_b
= *(const struct gfs2_quota_data
**)b
;
562 if (!test_bit(QDF_USER
, &qd_a
->qd_flags
) !=
563 !test_bit(QDF_USER
, &qd_b
->qd_flags
)) {
564 if (test_bit(QDF_USER
, &qd_a
->qd_flags
))
569 if (qd_a
->qd_id
< qd_b
->qd_id
)
571 if (qd_a
->qd_id
> qd_b
->qd_id
)
577 static void do_qc(struct gfs2_quota_data
*qd
, s64 change
)
579 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
580 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
581 struct gfs2_quota_change
*qc
= qd
->qd_bh_qc
;
584 mutex_lock(&sdp
->sd_quota_mutex
);
585 gfs2_trans_add_bh(ip
->i_gl
, qd
->qd_bh
, 1);
587 if (!test_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
590 if (test_bit(QDF_USER
, &qd
->qd_flags
))
591 qc
->qc_flags
= cpu_to_be32(GFS2_QCF_USER
);
592 qc
->qc_id
= cpu_to_be32(qd
->qd_id
);
595 x
= be64_to_cpu(qc
->qc_change
) + change
;
596 qc
->qc_change
= cpu_to_be64(x
);
598 spin_lock(&qd_lru_lock
);
600 spin_unlock(&qd_lru_lock
);
603 gfs2_assert_warn(sdp
, test_bit(QDF_CHANGE
, &qd
->qd_flags
));
604 clear_bit(QDF_CHANGE
, &qd
->qd_flags
);
609 } else if (!test_and_set_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
614 mutex_unlock(&sdp
->sd_quota_mutex
);
618 * gfs2_adjust_quota - adjust record of current block usage
619 * @ip: The quota inode
620 * @loc: Offset of the entry in the quota file
621 * @change: The amount of usage change to record
622 * @qd: The quota data
623 * @fdq: The updated limits to record
625 * This function was mostly borrowed from gfs2_block_truncate_page which was
626 * in turn mostly borrowed from ext3
628 * Returns: 0 or -ve on error
631 static int gfs2_adjust_quota(struct gfs2_inode
*ip
, loff_t loc
,
632 s64 change
, struct gfs2_quota_data
*qd
,
633 struct fs_disk_quota
*fdq
)
635 struct inode
*inode
= &ip
->i_inode
;
636 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
637 struct address_space
*mapping
= inode
->i_mapping
;
638 unsigned long index
= loc
>> PAGE_CACHE_SHIFT
;
639 unsigned offset
= loc
& (PAGE_CACHE_SIZE
- 1);
640 unsigned blocksize
, iblock
, pos
;
641 struct buffer_head
*bh
;
644 struct gfs2_quota q
, *qp
;
648 if (gfs2_is_stuffed(ip
))
649 gfs2_unstuff_dinode(ip
, NULL
);
651 memset(&q
, 0, sizeof(struct gfs2_quota
));
652 err
= gfs2_internal_read(ip
, NULL
, (char *)&q
, &loc
, sizeof(q
));
658 qp
->qu_value
= be64_to_cpu(qp
->qu_value
);
659 qp
->qu_value
+= change
;
660 qp
->qu_value
= cpu_to_be64(qp
->qu_value
);
661 qd
->qd_qb
.qb_value
= qp
->qu_value
;
663 if (fdq
->d_fieldmask
& FS_DQ_BSOFT
) {
664 qp
->qu_warn
= cpu_to_be64(fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
);
665 qd
->qd_qb
.qb_warn
= qp
->qu_warn
;
667 if (fdq
->d_fieldmask
& FS_DQ_BHARD
) {
668 qp
->qu_limit
= cpu_to_be64(fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
);
669 qd
->qd_qb
.qb_limit
= qp
->qu_limit
;
671 if (fdq
->d_fieldmask
& FS_DQ_BCOUNT
) {
672 qp
->qu_value
= cpu_to_be64(fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
);
673 qd
->qd_qb
.qb_value
= qp
->qu_value
;
677 /* Write the quota into the quota file on disk */
679 nbytes
= sizeof(struct gfs2_quota
);
681 page
= grab_cache_page(mapping
, index
);
685 blocksize
= inode
->i_sb
->s_blocksize
;
686 iblock
= index
<< (PAGE_CACHE_SHIFT
- inode
->i_sb
->s_blocksize_bits
);
688 if (!page_has_buffers(page
))
689 create_empty_buffers(page
, blocksize
, 0);
691 bh
= page_buffers(page
);
693 while (offset
>= pos
) {
694 bh
= bh
->b_this_page
;
699 if (!buffer_mapped(bh
)) {
700 gfs2_block_map(inode
, iblock
, bh
, 1);
701 if (!buffer_mapped(bh
))
703 /* If it's a newly allocated disk block for quota, zero it */
705 zero_user(page
, pos
- blocksize
, bh
->b_size
);
708 if (PageUptodate(page
))
709 set_buffer_uptodate(bh
);
711 if (!buffer_uptodate(bh
)) {
712 ll_rw_block(READ
| REQ_META
| REQ_PRIO
, 1, &bh
);
714 if (!buffer_uptodate(bh
))
718 gfs2_trans_add_bh(ip
->i_gl
, bh
, 0);
720 kaddr
= kmap_atomic(page
, KM_USER0
);
721 if (offset
+ sizeof(struct gfs2_quota
) > PAGE_CACHE_SIZE
)
722 nbytes
= PAGE_CACHE_SIZE
- offset
;
723 memcpy(kaddr
+ offset
, ptr
, nbytes
);
724 flush_dcache_page(page
);
725 kunmap_atomic(kaddr
, KM_USER0
);
727 page_cache_release(page
);
729 /* If quota straddles page boundary, we need to update the rest of the
730 * quota at the beginning of the next page */
731 if ((offset
+ sizeof(struct gfs2_quota
)) > PAGE_CACHE_SIZE
) {
733 nbytes
= sizeof(struct gfs2_quota
) - nbytes
;
739 size
= loc
+ sizeof(struct gfs2_quota
);
740 if (size
> inode
->i_size
)
741 i_size_write(inode
, size
);
742 inode
->i_mtime
= inode
->i_atime
= CURRENT_TIME
;
743 mark_inode_dirty(inode
);
748 page_cache_release(page
);
752 static int do_sync(unsigned int num_qd
, struct gfs2_quota_data
**qda
)
754 struct gfs2_sbd
*sdp
= (*qda
)->qd_gl
->gl_sbd
;
755 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
756 unsigned int data_blocks
, ind_blocks
;
757 struct gfs2_holder
*ghs
, i_gh
;
759 struct gfs2_quota_data
*qd
;
761 unsigned int nalloc
= 0, blocks
;
762 struct gfs2_alloc
*al
= NULL
;
765 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
766 &data_blocks
, &ind_blocks
);
768 ghs
= kcalloc(num_qd
, sizeof(struct gfs2_holder
), GFP_NOFS
);
772 sort(qda
, num_qd
, sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
773 mutex_lock_nested(&ip
->i_inode
.i_mutex
, I_MUTEX_QUOTA
);
774 for (qx
= 0; qx
< num_qd
; qx
++) {
775 error
= gfs2_glock_nq_init(qda
[qx
]->qd_gl
, LM_ST_EXCLUSIVE
,
776 GL_NOCACHE
, &ghs
[qx
]);
781 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
785 for (x
= 0; x
< num_qd
; x
++) {
786 offset
= qd2offset(qda
[x
]);
787 if (gfs2_write_alloc_required(ip
, offset
,
788 sizeof(struct gfs2_quota
)))
792 al
= gfs2_alloc_get(ip
);
798 * 1 blk for unstuffing inode if stuffed. We add this extra
799 * block to the reservation unconditionally. If the inode
800 * doesn't need unstuffing, the block will be released to the
801 * rgrp since it won't be allocated during the transaction
803 al
->al_requested
= 1;
804 /* +3 in the end for unstuffing block, inode size update block
805 * and another block in case quota straddles page boundary and
806 * two blocks need to be updated instead of 1 */
807 blocks
= num_qd
* data_blocks
+ RES_DINODE
+ num_qd
+ 3;
810 al
->al_requested
+= nalloc
* (data_blocks
+ ind_blocks
);
811 error
= gfs2_inplace_reserve(ip
);
816 blocks
+= gfs2_rg_blocks(ip
) + nalloc
* ind_blocks
+ RES_STATFS
;
818 error
= gfs2_trans_begin(sdp
, blocks
, 0);
822 for (x
= 0; x
< num_qd
; x
++) {
824 offset
= qd2offset(qd
);
825 error
= gfs2_adjust_quota(ip
, offset
, qd
->qd_change_sync
, qd
, NULL
);
829 do_qc(qd
, -qd
->qd_change_sync
);
830 set_bit(QDF_REFRESH
, &qd
->qd_flags
);
838 gfs2_inplace_release(ip
);
842 gfs2_glock_dq_uninit(&i_gh
);
845 gfs2_glock_dq_uninit(&ghs
[qx
]);
846 mutex_unlock(&ip
->i_inode
.i_mutex
);
848 gfs2_log_flush(ip
->i_gl
->gl_sbd
, ip
->i_gl
);
852 static int update_qd(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
)
854 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
856 struct gfs2_quota_lvb
*qlvb
;
860 memset(&q
, 0, sizeof(struct gfs2_quota
));
862 error
= gfs2_internal_read(ip
, NULL
, (char *)&q
, &pos
, sizeof(q
));
866 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lvb
;
867 qlvb
->qb_magic
= cpu_to_be32(GFS2_MAGIC
);
869 qlvb
->qb_limit
= q
.qu_limit
;
870 qlvb
->qb_warn
= q
.qu_warn
;
871 qlvb
->qb_value
= q
.qu_value
;
877 static int do_glock(struct gfs2_quota_data
*qd
, int force_refresh
,
878 struct gfs2_holder
*q_gh
)
880 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
881 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
882 struct gfs2_holder i_gh
;
886 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_SHARED
, 0, q_gh
);
890 qd
->qd_qb
= *(struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lvb
;
892 if (force_refresh
|| qd
->qd_qb
.qb_magic
!= cpu_to_be32(GFS2_MAGIC
)) {
893 gfs2_glock_dq_uninit(q_gh
);
894 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
,
899 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
903 error
= update_qd(sdp
, qd
);
907 gfs2_glock_dq_uninit(&i_gh
);
908 gfs2_glock_dq_uninit(q_gh
);
916 gfs2_glock_dq_uninit(&i_gh
);
918 gfs2_glock_dq_uninit(q_gh
);
922 int gfs2_quota_lock(struct gfs2_inode
*ip
, u32 uid
, u32 gid
)
924 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
925 struct gfs2_alloc
*al
= ip
->i_alloc
;
926 struct gfs2_quota_data
*qd
;
930 gfs2_quota_hold(ip
, uid
, gid
);
932 if (capable(CAP_SYS_RESOURCE
) ||
933 sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
936 sort(al
->al_qd
, al
->al_qd_num
, sizeof(struct gfs2_quota_data
*),
939 for (x
= 0; x
< al
->al_qd_num
; x
++) {
940 int force
= NO_FORCE
;
942 if (test_and_clear_bit(QDF_REFRESH
, &qd
->qd_flags
))
944 error
= do_glock(qd
, force
, &al
->al_qd_ghs
[x
]);
950 set_bit(GIF_QD_LOCKED
, &ip
->i_flags
);
953 gfs2_glock_dq_uninit(&al
->al_qd_ghs
[x
]);
954 gfs2_quota_unhold(ip
);
960 static int need_sync(struct gfs2_quota_data
*qd
)
962 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
963 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
965 unsigned int num
, den
;
968 if (!qd
->qd_qb
.qb_limit
)
971 spin_lock(&qd_lru_lock
);
972 value
= qd
->qd_change
;
973 spin_unlock(&qd_lru_lock
);
975 spin_lock(>
->gt_spin
);
976 num
= gt
->gt_quota_scale_num
;
977 den
= gt
->gt_quota_scale_den
;
978 spin_unlock(>
->gt_spin
);
982 else if ((s64
)be64_to_cpu(qd
->qd_qb
.qb_value
) >=
983 (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
986 value
*= gfs2_jindex_size(sdp
) * num
;
987 value
= div_s64(value
, den
);
988 value
+= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
989 if (value
< (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
996 void gfs2_quota_unlock(struct gfs2_inode
*ip
)
998 struct gfs2_alloc
*al
= ip
->i_alloc
;
999 struct gfs2_quota_data
*qda
[4];
1000 unsigned int count
= 0;
1003 if (!test_and_clear_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1006 for (x
= 0; x
< al
->al_qd_num
; x
++) {
1007 struct gfs2_quota_data
*qd
;
1011 sync
= need_sync(qd
);
1013 gfs2_glock_dq_uninit(&al
->al_qd_ghs
[x
]);
1015 if (sync
&& qd_trylock(qd
))
1020 do_sync(count
, qda
);
1021 for (x
= 0; x
< count
; x
++)
1026 gfs2_quota_unhold(ip
);
1029 #define MAX_LINE 256
1031 static int print_message(struct gfs2_quota_data
*qd
, char *type
)
1033 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
1035 printk(KERN_INFO
"GFS2: fsid=%s: quota %s for %s %u\n",
1036 sdp
->sd_fsname
, type
,
1037 (test_bit(QDF_USER
, &qd
->qd_flags
)) ? "user" : "group",
1043 int gfs2_quota_check(struct gfs2_inode
*ip
, u32 uid
, u32 gid
)
1045 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1046 struct gfs2_alloc
*al
= ip
->i_alloc
;
1047 struct gfs2_quota_data
*qd
;
1052 if (!test_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1055 if (sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
1058 for (x
= 0; x
< al
->al_qd_num
; x
++) {
1061 if (!((qd
->qd_id
== uid
&& test_bit(QDF_USER
, &qd
->qd_flags
)) ||
1062 (qd
->qd_id
== gid
&& !test_bit(QDF_USER
, &qd
->qd_flags
))))
1065 value
= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1066 spin_lock(&qd_lru_lock
);
1067 value
+= qd
->qd_change
;
1068 spin_unlock(&qd_lru_lock
);
1070 if (be64_to_cpu(qd
->qd_qb
.qb_limit
) && (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
) < value
) {
1071 print_message(qd
, "exceeded");
1072 quota_send_warning(test_bit(QDF_USER
, &qd
->qd_flags
) ?
1073 USRQUOTA
: GRPQUOTA
, qd
->qd_id
,
1074 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BHARDWARN
);
1078 } else if (be64_to_cpu(qd
->qd_qb
.qb_warn
) &&
1079 (s64
)be64_to_cpu(qd
->qd_qb
.qb_warn
) < value
&&
1080 time_after_eq(jiffies
, qd
->qd_last_warn
+
1082 gt_quota_warn_period
) * HZ
)) {
1083 quota_send_warning(test_bit(QDF_USER
, &qd
->qd_flags
) ?
1084 USRQUOTA
: GRPQUOTA
, qd
->qd_id
,
1085 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BSOFTWARN
);
1086 error
= print_message(qd
, "warning");
1087 qd
->qd_last_warn
= jiffies
;
1094 void gfs2_quota_change(struct gfs2_inode
*ip
, s64 change
,
1097 struct gfs2_alloc
*al
= ip
->i_alloc
;
1098 struct gfs2_quota_data
*qd
;
1101 if (gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), change
))
1103 if (ip
->i_diskflags
& GFS2_DIF_SYSTEM
)
1106 for (x
= 0; x
< al
->al_qd_num
; x
++) {
1109 if ((qd
->qd_id
== uid
&& test_bit(QDF_USER
, &qd
->qd_flags
)) ||
1110 (qd
->qd_id
== gid
&& !test_bit(QDF_USER
, &qd
->qd_flags
))) {
1116 int gfs2_quota_sync(struct super_block
*sb
, int type
, int wait
)
1118 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1119 struct gfs2_quota_data
**qda
;
1120 unsigned int max_qd
= gfs2_tune_get(sdp
, gt_quota_simul_sync
);
1121 unsigned int num_qd
;
1125 sdp
->sd_quota_sync_gen
++;
1127 qda
= kcalloc(max_qd
, sizeof(struct gfs2_quota_data
*), GFP_KERNEL
);
1135 error
= qd_fish(sdp
, qda
+ num_qd
);
1136 if (error
|| !qda
[num_qd
])
1138 if (++num_qd
== max_qd
)
1144 error
= do_sync(num_qd
, qda
);
1146 for (x
= 0; x
< num_qd
; x
++)
1147 qda
[x
]->qd_sync_gen
=
1148 sdp
->sd_quota_sync_gen
;
1150 for (x
= 0; x
< num_qd
; x
++)
1153 } while (!error
&& num_qd
== max_qd
);
1160 static int gfs2_quota_sync_timeo(struct super_block
*sb
, int type
)
1162 return gfs2_quota_sync(sb
, type
, 0);
1165 int gfs2_quota_refresh(struct gfs2_sbd
*sdp
, int user
, u32 id
)
1167 struct gfs2_quota_data
*qd
;
1168 struct gfs2_holder q_gh
;
1171 error
= qd_get(sdp
, user
, id
, &qd
);
1175 error
= do_glock(qd
, FORCE
, &q_gh
);
1177 gfs2_glock_dq_uninit(&q_gh
);
1183 static void gfs2_quota_change_in(struct gfs2_quota_change_host
*qc
, const void *buf
)
1185 const struct gfs2_quota_change
*str
= buf
;
1187 qc
->qc_change
= be64_to_cpu(str
->qc_change
);
1188 qc
->qc_flags
= be32_to_cpu(str
->qc_flags
);
1189 qc
->qc_id
= be32_to_cpu(str
->qc_id
);
1192 int gfs2_quota_init(struct gfs2_sbd
*sdp
)
1194 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
1195 u64 size
= i_size_read(sdp
->sd_qc_inode
);
1196 unsigned int blocks
= size
>> sdp
->sd_sb
.sb_bsize_shift
;
1197 unsigned int x
, slot
= 0;
1198 unsigned int found
= 0;
1203 if (gfs2_check_internal_file_size(sdp
->sd_qc_inode
, 1, 64 << 20))
1206 sdp
->sd_quota_slots
= blocks
* sdp
->sd_qc_per_block
;
1207 sdp
->sd_quota_chunks
= DIV_ROUND_UP(sdp
->sd_quota_slots
, 8 * PAGE_SIZE
);
1211 sdp
->sd_quota_bitmap
= kcalloc(sdp
->sd_quota_chunks
,
1212 sizeof(unsigned char *), GFP_NOFS
);
1213 if (!sdp
->sd_quota_bitmap
)
1216 for (x
= 0; x
< sdp
->sd_quota_chunks
; x
++) {
1217 sdp
->sd_quota_bitmap
[x
] = kzalloc(PAGE_SIZE
, GFP_NOFS
);
1218 if (!sdp
->sd_quota_bitmap
[x
])
1222 for (x
= 0; x
< blocks
; x
++) {
1223 struct buffer_head
*bh
;
1228 error
= gfs2_extent_map(&ip
->i_inode
, x
, &new, &dblock
, &extlen
);
1233 bh
= gfs2_meta_ra(ip
->i_gl
, dblock
, extlen
);
1236 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
)) {
1241 for (y
= 0; y
< sdp
->sd_qc_per_block
&& slot
< sdp
->sd_quota_slots
;
1243 struct gfs2_quota_change_host qc
;
1244 struct gfs2_quota_data
*qd
;
1246 gfs2_quota_change_in(&qc
, bh
->b_data
+
1247 sizeof(struct gfs2_meta_header
) +
1248 y
* sizeof(struct gfs2_quota_change
));
1252 error
= qd_alloc(sdp
, (qc
.qc_flags
& GFS2_QCF_USER
),
1259 set_bit(QDF_CHANGE
, &qd
->qd_flags
);
1260 qd
->qd_change
= qc
.qc_change
;
1262 qd
->qd_slot_count
= 1;
1264 spin_lock(&qd_lru_lock
);
1265 gfs2_icbit_munge(sdp
, sdp
->sd_quota_bitmap
, slot
, 1);
1266 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
1267 atomic_inc(&sdp
->sd_quota_count
);
1268 spin_unlock(&qd_lru_lock
);
1279 fs_info(sdp
, "found %u quota changes\n", found
);
1284 gfs2_quota_cleanup(sdp
);
1288 void gfs2_quota_cleanup(struct gfs2_sbd
*sdp
)
1290 struct list_head
*head
= &sdp
->sd_quota_list
;
1291 struct gfs2_quota_data
*qd
;
1294 spin_lock(&qd_lru_lock
);
1295 while (!list_empty(head
)) {
1296 qd
= list_entry(head
->prev
, struct gfs2_quota_data
, qd_list
);
1298 if (atomic_read(&qd
->qd_count
) > 1 ||
1299 (atomic_read(&qd
->qd_count
) &&
1300 !test_bit(QDF_CHANGE
, &qd
->qd_flags
))) {
1301 list_move(&qd
->qd_list
, head
);
1302 spin_unlock(&qd_lru_lock
);
1304 spin_lock(&qd_lru_lock
);
1308 list_del(&qd
->qd_list
);
1309 /* Also remove if this qd exists in the reclaim list */
1310 if (!list_empty(&qd
->qd_reclaim
)) {
1311 list_del_init(&qd
->qd_reclaim
);
1312 atomic_dec(&qd_lru_count
);
1314 atomic_dec(&sdp
->sd_quota_count
);
1315 spin_unlock(&qd_lru_lock
);
1317 if (!atomic_read(&qd
->qd_count
)) {
1318 gfs2_assert_warn(sdp
, !qd
->qd_change
);
1319 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
1321 gfs2_assert_warn(sdp
, qd
->qd_slot_count
== 1);
1322 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
1324 gfs2_glock_put(qd
->qd_gl
);
1325 kmem_cache_free(gfs2_quotad_cachep
, qd
);
1327 spin_lock(&qd_lru_lock
);
1329 spin_unlock(&qd_lru_lock
);
1331 gfs2_assert_warn(sdp
, !atomic_read(&sdp
->sd_quota_count
));
1333 if (sdp
->sd_quota_bitmap
) {
1334 for (x
= 0; x
< sdp
->sd_quota_chunks
; x
++)
1335 kfree(sdp
->sd_quota_bitmap
[x
]);
1336 kfree(sdp
->sd_quota_bitmap
);
1340 static void quotad_error(struct gfs2_sbd
*sdp
, const char *msg
, int error
)
1342 if (error
== 0 || error
== -EROFS
)
1344 if (!test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
))
1345 fs_err(sdp
, "gfs2_quotad: %s error %d\n", msg
, error
);
1348 static void quotad_check_timeo(struct gfs2_sbd
*sdp
, const char *msg
,
1349 int (*fxn
)(struct super_block
*sb
, int type
),
1350 unsigned long t
, unsigned long *timeo
,
1351 unsigned int *new_timeo
)
1354 int error
= fxn(sdp
->sd_vfs
, 0);
1355 quotad_error(sdp
, msg
, error
);
1356 *timeo
= gfs2_tune_get_i(&sdp
->sd_tune
, new_timeo
) * HZ
;
1362 static void quotad_check_trunc_list(struct gfs2_sbd
*sdp
)
1364 struct gfs2_inode
*ip
;
1368 spin_lock(&sdp
->sd_trunc_lock
);
1369 if (!list_empty(&sdp
->sd_trunc_list
)) {
1370 ip
= list_entry(sdp
->sd_trunc_list
.next
,
1371 struct gfs2_inode
, i_trunc_list
);
1372 list_del_init(&ip
->i_trunc_list
);
1374 spin_unlock(&sdp
->sd_trunc_lock
);
1377 gfs2_glock_finish_truncate(ip
);
1381 void gfs2_wake_up_statfs(struct gfs2_sbd
*sdp
) {
1382 if (!sdp
->sd_statfs_force_sync
) {
1383 sdp
->sd_statfs_force_sync
= 1;
1384 wake_up(&sdp
->sd_quota_wait
);
1390 * gfs2_quotad - Write cached quota changes into the quota file
1391 * @sdp: Pointer to GFS2 superblock
1395 int gfs2_quotad(void *data
)
1397 struct gfs2_sbd
*sdp
= data
;
1398 struct gfs2_tune
*tune
= &sdp
->sd_tune
;
1399 unsigned long statfs_timeo
= 0;
1400 unsigned long quotad_timeo
= 0;
1401 unsigned long t
= 0;
1405 while (!kthread_should_stop()) {
1407 /* Update the master statfs file */
1408 if (sdp
->sd_statfs_force_sync
) {
1409 int error
= gfs2_statfs_sync(sdp
->sd_vfs
, 0);
1410 quotad_error(sdp
, "statfs", error
);
1411 statfs_timeo
= gfs2_tune_get(sdp
, gt_statfs_quantum
) * HZ
;
1414 quotad_check_timeo(sdp
, "statfs", gfs2_statfs_sync
, t
,
1416 &tune
->gt_statfs_quantum
);
1418 /* Update quota file */
1419 quotad_check_timeo(sdp
, "sync", gfs2_quota_sync_timeo
, t
,
1420 "ad_timeo
, &tune
->gt_quota_quantum
);
1422 /* Check for & recover partially truncated inodes */
1423 quotad_check_trunc_list(sdp
);
1425 if (freezing(current
))
1427 t
= min(quotad_timeo
, statfs_timeo
);
1429 prepare_to_wait(&sdp
->sd_quota_wait
, &wait
, TASK_INTERRUPTIBLE
);
1430 spin_lock(&sdp
->sd_trunc_lock
);
1431 empty
= list_empty(&sdp
->sd_trunc_list
);
1432 spin_unlock(&sdp
->sd_trunc_lock
);
1433 if (empty
&& !sdp
->sd_statfs_force_sync
)
1434 t
-= schedule_timeout(t
);
1437 finish_wait(&sdp
->sd_quota_wait
, &wait
);
1443 static int gfs2_quota_get_xstate(struct super_block
*sb
,
1444 struct fs_quota_stat
*fqs
)
1446 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1448 memset(fqs
, 0, sizeof(struct fs_quota_stat
));
1449 fqs
->qs_version
= FS_QSTAT_VERSION
;
1451 switch (sdp
->sd_args
.ar_quota
) {
1453 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ENFD
| FS_QUOTA_GDQ_ENFD
);
1455 case GFS2_QUOTA_ACCOUNT
:
1456 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ACCT
| FS_QUOTA_GDQ_ACCT
);
1458 case GFS2_QUOTA_OFF
:
1462 if (sdp
->sd_quota_inode
) {
1463 fqs
->qs_uquota
.qfs_ino
= GFS2_I(sdp
->sd_quota_inode
)->i_no_addr
;
1464 fqs
->qs_uquota
.qfs_nblks
= sdp
->sd_quota_inode
->i_blocks
;
1466 fqs
->qs_uquota
.qfs_nextents
= 1; /* unsupported */
1467 fqs
->qs_gquota
= fqs
->qs_uquota
; /* its the same inode in both cases */
1468 fqs
->qs_incoredqs
= atomic_read(&qd_lru_count
);
1472 static int gfs2_get_dqblk(struct super_block
*sb
, int type
, qid_t id
,
1473 struct fs_disk_quota
*fdq
)
1475 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1476 struct gfs2_quota_lvb
*qlvb
;
1477 struct gfs2_quota_data
*qd
;
1478 struct gfs2_holder q_gh
;
1481 memset(fdq
, 0, sizeof(struct fs_disk_quota
));
1483 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1484 return -ESRCH
; /* Crazy XFS error code */
1486 if (type
== USRQUOTA
)
1488 else if (type
== GRPQUOTA
)
1493 error
= qd_get(sdp
, type
, id
, &qd
);
1496 error
= do_glock(qd
, FORCE
, &q_gh
);
1500 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lvb
;
1501 fdq
->d_version
= FS_DQUOT_VERSION
;
1502 fdq
->d_flags
= (type
== QUOTA_USER
) ? FS_USER_QUOTA
: FS_GROUP_QUOTA
;
1504 fdq
->d_blk_hardlimit
= be64_to_cpu(qlvb
->qb_limit
) << sdp
->sd_fsb2bb_shift
;
1505 fdq
->d_blk_softlimit
= be64_to_cpu(qlvb
->qb_warn
) << sdp
->sd_fsb2bb_shift
;
1506 fdq
->d_bcount
= be64_to_cpu(qlvb
->qb_value
) << sdp
->sd_fsb2bb_shift
;
1508 gfs2_glock_dq_uninit(&q_gh
);
1514 /* GFS2 only supports a subset of the XFS fields */
1515 #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
1517 static int gfs2_set_dqblk(struct super_block
*sb
, int type
, qid_t id
,
1518 struct fs_disk_quota
*fdq
)
1520 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1521 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
1522 struct gfs2_quota_data
*qd
;
1523 struct gfs2_holder q_gh
, i_gh
;
1524 unsigned int data_blocks
, ind_blocks
;
1525 unsigned int blocks
= 0;
1527 struct gfs2_alloc
*al
;
1531 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1532 return -ESRCH
; /* Crazy XFS error code */
1537 if (fdq
->d_flags
!= FS_USER_QUOTA
)
1542 if (fdq
->d_flags
!= FS_GROUP_QUOTA
)
1549 if (fdq
->d_fieldmask
& ~GFS2_FIELDMASK
)
1551 if (fdq
->d_id
!= id
)
1554 error
= qd_get(sdp
, type
, id
, &qd
);
1558 mutex_lock(&ip
->i_inode
.i_mutex
);
1559 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
, 0, &q_gh
);
1562 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1566 /* Check for existing entry, if none then alloc new blocks */
1567 error
= update_qd(sdp
, qd
);
1571 /* If nothing has changed, this is a no-op */
1572 if ((fdq
->d_fieldmask
& FS_DQ_BSOFT
) &&
1573 ((fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_warn
)))
1574 fdq
->d_fieldmask
^= FS_DQ_BSOFT
;
1576 if ((fdq
->d_fieldmask
& FS_DQ_BHARD
) &&
1577 ((fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_limit
)))
1578 fdq
->d_fieldmask
^= FS_DQ_BHARD
;
1580 if ((fdq
->d_fieldmask
& FS_DQ_BCOUNT
) &&
1581 ((fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_value
)))
1582 fdq
->d_fieldmask
^= FS_DQ_BCOUNT
;
1584 if (fdq
->d_fieldmask
== 0)
1587 offset
= qd2offset(qd
);
1588 alloc_required
= gfs2_write_alloc_required(ip
, offset
, sizeof(struct gfs2_quota
));
1589 if (gfs2_is_stuffed(ip
))
1591 if (alloc_required
) {
1592 al
= gfs2_alloc_get(ip
);
1595 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
1596 &data_blocks
, &ind_blocks
);
1597 blocks
= al
->al_requested
= 1 + data_blocks
+ ind_blocks
;
1598 error
= gfs2_inplace_reserve(ip
);
1601 blocks
+= gfs2_rg_blocks(ip
);
1604 /* Some quotas span block boundaries and can update two blocks,
1605 adding an extra block to the transaction to handle such quotas */
1606 error
= gfs2_trans_begin(sdp
, blocks
+ RES_DINODE
+ 2, 0);
1611 error
= gfs2_adjust_quota(ip
, offset
, 0, qd
, fdq
);
1613 gfs2_trans_end(sdp
);
1615 if (alloc_required
) {
1616 gfs2_inplace_release(ip
);
1621 gfs2_glock_dq_uninit(&i_gh
);
1623 gfs2_glock_dq_uninit(&q_gh
);
1625 mutex_unlock(&ip
->i_inode
.i_mutex
);
1630 const struct quotactl_ops gfs2_quotactl_ops
= {
1631 .quota_sync
= gfs2_quota_sync
,
1632 .get_xstate
= gfs2_quota_get_xstate
,
1633 .get_dqblk
= gfs2_get_dqblk
,
1634 .set_dqblk
= gfs2_set_dqblk
,