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_quota_data
**qd
;
500 if (ip
->i_res
== NULL
)
503 qd
= ip
->i_res
->rs_qa_qd
;
505 if (gfs2_assert_warn(sdp
, !ip
->i_res
->rs_qa_qd_num
) ||
506 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
)))
509 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
512 error
= qdsb_get(sdp
, QUOTA_USER
, ip
->i_inode
.i_uid
, qd
);
515 ip
->i_res
->rs_qa_qd_num
++;
518 error
= qdsb_get(sdp
, QUOTA_GROUP
, ip
->i_inode
.i_gid
, qd
);
521 ip
->i_res
->rs_qa_qd_num
++;
524 if (uid
!= NO_QUOTA_CHANGE
&& uid
!= ip
->i_inode
.i_uid
) {
525 error
= qdsb_get(sdp
, QUOTA_USER
, uid
, qd
);
528 ip
->i_res
->rs_qa_qd_num
++;
532 if (gid
!= NO_QUOTA_CHANGE
&& gid
!= ip
->i_inode
.i_gid
) {
533 error
= qdsb_get(sdp
, QUOTA_GROUP
, gid
, qd
);
536 ip
->i_res
->rs_qa_qd_num
++;
542 gfs2_quota_unhold(ip
);
546 void gfs2_quota_unhold(struct gfs2_inode
*ip
)
548 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
551 if (ip
->i_res
== NULL
)
553 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
));
555 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
556 qdsb_put(ip
->i_res
->rs_qa_qd
[x
]);
557 ip
->i_res
->rs_qa_qd
[x
] = NULL
;
559 ip
->i_res
->rs_qa_qd_num
= 0;
562 static int sort_qd(const void *a
, const void *b
)
564 const struct gfs2_quota_data
*qd_a
= *(const struct gfs2_quota_data
**)a
;
565 const struct gfs2_quota_data
*qd_b
= *(const struct gfs2_quota_data
**)b
;
567 if (!test_bit(QDF_USER
, &qd_a
->qd_flags
) !=
568 !test_bit(QDF_USER
, &qd_b
->qd_flags
)) {
569 if (test_bit(QDF_USER
, &qd_a
->qd_flags
))
574 if (qd_a
->qd_id
< qd_b
->qd_id
)
576 if (qd_a
->qd_id
> qd_b
->qd_id
)
582 static void do_qc(struct gfs2_quota_data
*qd
, s64 change
)
584 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
585 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
586 struct gfs2_quota_change
*qc
= qd
->qd_bh_qc
;
589 mutex_lock(&sdp
->sd_quota_mutex
);
590 gfs2_trans_add_bh(ip
->i_gl
, qd
->qd_bh
, 1);
592 if (!test_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
595 if (test_bit(QDF_USER
, &qd
->qd_flags
))
596 qc
->qc_flags
= cpu_to_be32(GFS2_QCF_USER
);
597 qc
->qc_id
= cpu_to_be32(qd
->qd_id
);
600 x
= be64_to_cpu(qc
->qc_change
) + change
;
601 qc
->qc_change
= cpu_to_be64(x
);
603 spin_lock(&qd_lru_lock
);
605 spin_unlock(&qd_lru_lock
);
608 gfs2_assert_warn(sdp
, test_bit(QDF_CHANGE
, &qd
->qd_flags
));
609 clear_bit(QDF_CHANGE
, &qd
->qd_flags
);
614 } else if (!test_and_set_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
619 mutex_unlock(&sdp
->sd_quota_mutex
);
623 * gfs2_adjust_quota - adjust record of current block usage
624 * @ip: The quota inode
625 * @loc: Offset of the entry in the quota file
626 * @change: The amount of usage change to record
627 * @qd: The quota data
628 * @fdq: The updated limits to record
630 * This function was mostly borrowed from gfs2_block_truncate_page which was
631 * in turn mostly borrowed from ext3
633 * Returns: 0 or -ve on error
636 static int gfs2_adjust_quota(struct gfs2_inode
*ip
, loff_t loc
,
637 s64 change
, struct gfs2_quota_data
*qd
,
638 struct fs_disk_quota
*fdq
)
640 struct inode
*inode
= &ip
->i_inode
;
641 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
642 struct address_space
*mapping
= inode
->i_mapping
;
643 unsigned long index
= loc
>> PAGE_CACHE_SHIFT
;
644 unsigned offset
= loc
& (PAGE_CACHE_SIZE
- 1);
645 unsigned blocksize
, iblock
, pos
;
646 struct buffer_head
*bh
;
649 struct gfs2_quota q
, *qp
;
653 if (gfs2_is_stuffed(ip
)) {
654 err
= gfs2_unstuff_dinode(ip
, NULL
);
659 memset(&q
, 0, sizeof(struct gfs2_quota
));
660 err
= gfs2_internal_read(ip
, (char *)&q
, &loc
, sizeof(q
));
666 qp
->qu_value
= be64_to_cpu(qp
->qu_value
);
667 qp
->qu_value
+= change
;
668 qp
->qu_value
= cpu_to_be64(qp
->qu_value
);
669 qd
->qd_qb
.qb_value
= qp
->qu_value
;
671 if (fdq
->d_fieldmask
& FS_DQ_BSOFT
) {
672 qp
->qu_warn
= cpu_to_be64(fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
);
673 qd
->qd_qb
.qb_warn
= qp
->qu_warn
;
675 if (fdq
->d_fieldmask
& FS_DQ_BHARD
) {
676 qp
->qu_limit
= cpu_to_be64(fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
);
677 qd
->qd_qb
.qb_limit
= qp
->qu_limit
;
679 if (fdq
->d_fieldmask
& FS_DQ_BCOUNT
) {
680 qp
->qu_value
= cpu_to_be64(fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
);
681 qd
->qd_qb
.qb_value
= qp
->qu_value
;
685 /* Write the quota into the quota file on disk */
687 nbytes
= sizeof(struct gfs2_quota
);
689 page
= find_or_create_page(mapping
, index
, GFP_NOFS
);
693 blocksize
= inode
->i_sb
->s_blocksize
;
694 iblock
= index
<< (PAGE_CACHE_SHIFT
- inode
->i_sb
->s_blocksize_bits
);
696 if (!page_has_buffers(page
))
697 create_empty_buffers(page
, blocksize
, 0);
699 bh
= page_buffers(page
);
701 while (offset
>= pos
) {
702 bh
= bh
->b_this_page
;
707 if (!buffer_mapped(bh
)) {
708 gfs2_block_map(inode
, iblock
, bh
, 1);
709 if (!buffer_mapped(bh
))
711 /* If it's a newly allocated disk block for quota, zero it */
713 zero_user(page
, pos
- blocksize
, bh
->b_size
);
716 if (PageUptodate(page
))
717 set_buffer_uptodate(bh
);
719 if (!buffer_uptodate(bh
)) {
720 ll_rw_block(READ
| REQ_META
, 1, &bh
);
722 if (!buffer_uptodate(bh
))
726 gfs2_trans_add_bh(ip
->i_gl
, bh
, 0);
728 kaddr
= kmap_atomic(page
);
729 if (offset
+ sizeof(struct gfs2_quota
) > PAGE_CACHE_SIZE
)
730 nbytes
= PAGE_CACHE_SIZE
- offset
;
731 memcpy(kaddr
+ offset
, ptr
, nbytes
);
732 flush_dcache_page(page
);
733 kunmap_atomic(kaddr
);
735 page_cache_release(page
);
737 /* If quota straddles page boundary, we need to update the rest of the
738 * quota at the beginning of the next page */
739 if ((offset
+ sizeof(struct gfs2_quota
)) > PAGE_CACHE_SIZE
) {
741 nbytes
= sizeof(struct gfs2_quota
) - nbytes
;
747 size
= loc
+ sizeof(struct gfs2_quota
);
748 if (size
> inode
->i_size
)
749 i_size_write(inode
, size
);
750 inode
->i_mtime
= inode
->i_atime
= CURRENT_TIME
;
751 mark_inode_dirty(inode
);
756 page_cache_release(page
);
760 static int do_sync(unsigned int num_qd
, struct gfs2_quota_data
**qda
)
762 struct gfs2_sbd
*sdp
= (*qda
)->qd_gl
->gl_sbd
;
763 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
764 unsigned int data_blocks
, ind_blocks
;
765 struct gfs2_holder
*ghs
, i_gh
;
767 struct gfs2_quota_data
*qd
;
770 unsigned int nalloc
= 0, blocks
;
773 error
= gfs2_rs_alloc(ip
);
777 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
778 &data_blocks
, &ind_blocks
);
780 ghs
= kcalloc(num_qd
, sizeof(struct gfs2_holder
), GFP_NOFS
);
784 sort(qda
, num_qd
, sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
785 mutex_lock(&ip
->i_inode
.i_mutex
);
786 for (qx
= 0; qx
< num_qd
; qx
++) {
787 error
= gfs2_glock_nq_init(qda
[qx
]->qd_gl
, LM_ST_EXCLUSIVE
,
788 GL_NOCACHE
, &ghs
[qx
]);
793 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
797 for (x
= 0; x
< num_qd
; x
++) {
798 offset
= qd2offset(qda
[x
]);
799 if (gfs2_write_alloc_required(ip
, offset
,
800 sizeof(struct gfs2_quota
)))
805 * 1 blk for unstuffing inode if stuffed. We add this extra
806 * block to the reservation unconditionally. If the inode
807 * doesn't need unstuffing, the block will be released to the
808 * rgrp since it won't be allocated during the transaction
810 /* +3 in the end for unstuffing block, inode size update block
811 * and another block in case quota straddles page boundary and
812 * two blocks need to be updated instead of 1 */
813 blocks
= num_qd
* data_blocks
+ RES_DINODE
+ num_qd
+ 3;
815 reserved
= 1 + (nalloc
* (data_blocks
+ ind_blocks
));
816 error
= gfs2_inplace_reserve(ip
, reserved
);
821 blocks
+= gfs2_rg_blocks(ip
, reserved
) + nalloc
* ind_blocks
+ RES_STATFS
;
823 error
= gfs2_trans_begin(sdp
, blocks
, 0);
827 for (x
= 0; x
< num_qd
; x
++) {
829 offset
= qd2offset(qd
);
830 error
= gfs2_adjust_quota(ip
, offset
, qd
->qd_change_sync
, qd
, NULL
);
834 do_qc(qd
, -qd
->qd_change_sync
);
835 set_bit(QDF_REFRESH
, &qd
->qd_flags
);
843 gfs2_inplace_release(ip
);
845 gfs2_glock_dq_uninit(&i_gh
);
848 gfs2_glock_dq_uninit(&ghs
[qx
]);
849 mutex_unlock(&ip
->i_inode
.i_mutex
);
851 gfs2_log_flush(ip
->i_gl
->gl_sbd
, ip
->i_gl
);
855 static int update_qd(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
)
857 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
859 struct gfs2_quota_lvb
*qlvb
;
863 memset(&q
, 0, sizeof(struct gfs2_quota
));
865 error
= gfs2_internal_read(ip
, (char *)&q
, &pos
, sizeof(q
));
869 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lvb
;
870 qlvb
->qb_magic
= cpu_to_be32(GFS2_MAGIC
);
872 qlvb
->qb_limit
= q
.qu_limit
;
873 qlvb
->qb_warn
= q
.qu_warn
;
874 qlvb
->qb_value
= q
.qu_value
;
880 static int do_glock(struct gfs2_quota_data
*qd
, int force_refresh
,
881 struct gfs2_holder
*q_gh
)
883 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
884 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
885 struct gfs2_holder i_gh
;
889 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_SHARED
, 0, q_gh
);
893 qd
->qd_qb
= *(struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lvb
;
895 if (force_refresh
|| qd
->qd_qb
.qb_magic
!= cpu_to_be32(GFS2_MAGIC
)) {
896 gfs2_glock_dq_uninit(q_gh
);
897 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
,
902 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
906 error
= update_qd(sdp
, qd
);
910 gfs2_glock_dq_uninit(&i_gh
);
911 gfs2_glock_dq_uninit(q_gh
);
919 gfs2_glock_dq_uninit(&i_gh
);
921 gfs2_glock_dq_uninit(q_gh
);
925 int gfs2_quota_lock(struct gfs2_inode
*ip
, u32 uid
, u32 gid
)
927 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
928 struct gfs2_quota_data
*qd
;
932 error
= gfs2_quota_hold(ip
, uid
, gid
);
936 if (capable(CAP_SYS_RESOURCE
) ||
937 sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
940 sort(ip
->i_res
->rs_qa_qd
, ip
->i_res
->rs_qa_qd_num
,
941 sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
943 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
944 int force
= NO_FORCE
;
945 qd
= ip
->i_res
->rs_qa_qd
[x
];
946 if (test_and_clear_bit(QDF_REFRESH
, &qd
->qd_flags
))
948 error
= do_glock(qd
, force
, &ip
->i_res
->rs_qa_qd_ghs
[x
]);
954 set_bit(GIF_QD_LOCKED
, &ip
->i_flags
);
957 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
958 gfs2_quota_unhold(ip
);
964 static int need_sync(struct gfs2_quota_data
*qd
)
966 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
967 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
969 unsigned int num
, den
;
972 if (!qd
->qd_qb
.qb_limit
)
975 spin_lock(&qd_lru_lock
);
976 value
= qd
->qd_change
;
977 spin_unlock(&qd_lru_lock
);
979 spin_lock(>
->gt_spin
);
980 num
= gt
->gt_quota_scale_num
;
981 den
= gt
->gt_quota_scale_den
;
982 spin_unlock(>
->gt_spin
);
986 else if ((s64
)be64_to_cpu(qd
->qd_qb
.qb_value
) >=
987 (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
990 value
*= gfs2_jindex_size(sdp
) * num
;
991 value
= div_s64(value
, den
);
992 value
+= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
993 if (value
< (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1000 void gfs2_quota_unlock(struct gfs2_inode
*ip
)
1002 struct gfs2_quota_data
*qda
[4];
1003 unsigned int count
= 0;
1006 if (!test_and_clear_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1009 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1010 struct gfs2_quota_data
*qd
;
1013 qd
= ip
->i_res
->rs_qa_qd
[x
];
1014 sync
= need_sync(qd
);
1016 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
1018 if (sync
&& qd_trylock(qd
))
1023 do_sync(count
, qda
);
1024 for (x
= 0; x
< count
; x
++)
1029 gfs2_quota_unhold(ip
);
1032 #define MAX_LINE 256
1034 static int print_message(struct gfs2_quota_data
*qd
, char *type
)
1036 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
1038 printk(KERN_INFO
"GFS2: fsid=%s: quota %s for %s %u\n",
1039 sdp
->sd_fsname
, type
,
1040 (test_bit(QDF_USER
, &qd
->qd_flags
)) ? "user" : "group",
1046 int gfs2_quota_check(struct gfs2_inode
*ip
, u32 uid
, u32 gid
)
1048 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1049 struct gfs2_quota_data
*qd
;
1054 if (!test_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1057 if (sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
1060 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1061 qd
= ip
->i_res
->rs_qa_qd
[x
];
1063 if (!((qd
->qd_id
== uid
&& test_bit(QDF_USER
, &qd
->qd_flags
)) ||
1064 (qd
->qd_id
== gid
&& !test_bit(QDF_USER
, &qd
->qd_flags
))))
1067 value
= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1068 spin_lock(&qd_lru_lock
);
1069 value
+= qd
->qd_change
;
1070 spin_unlock(&qd_lru_lock
);
1072 if (be64_to_cpu(qd
->qd_qb
.qb_limit
) && (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
) < value
) {
1073 print_message(qd
, "exceeded");
1074 quota_send_warning(test_bit(QDF_USER
, &qd
->qd_flags
) ?
1075 USRQUOTA
: GRPQUOTA
, qd
->qd_id
,
1076 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BHARDWARN
);
1080 } else if (be64_to_cpu(qd
->qd_qb
.qb_warn
) &&
1081 (s64
)be64_to_cpu(qd
->qd_qb
.qb_warn
) < value
&&
1082 time_after_eq(jiffies
, qd
->qd_last_warn
+
1084 gt_quota_warn_period
) * HZ
)) {
1085 quota_send_warning(test_bit(QDF_USER
, &qd
->qd_flags
) ?
1086 USRQUOTA
: GRPQUOTA
, qd
->qd_id
,
1087 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BSOFTWARN
);
1088 error
= print_message(qd
, "warning");
1089 qd
->qd_last_warn
= jiffies
;
1096 void gfs2_quota_change(struct gfs2_inode
*ip
, s64 change
,
1099 struct gfs2_quota_data
*qd
;
1102 if (gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), change
))
1104 if (ip
->i_diskflags
& GFS2_DIF_SYSTEM
)
1107 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1108 qd
= ip
->i_res
->rs_qa_qd
[x
];
1110 if ((qd
->qd_id
== uid
&& test_bit(QDF_USER
, &qd
->qd_flags
)) ||
1111 (qd
->qd_id
== gid
&& !test_bit(QDF_USER
, &qd
->qd_flags
))) {
1117 int gfs2_quota_sync(struct super_block
*sb
, int type
)
1119 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1120 struct gfs2_quota_data
**qda
;
1121 unsigned int max_qd
= gfs2_tune_get(sdp
, gt_quota_simul_sync
);
1122 unsigned int num_qd
;
1126 sdp
->sd_quota_sync_gen
++;
1128 qda
= kcalloc(max_qd
, sizeof(struct gfs2_quota_data
*), GFP_KERNEL
);
1136 error
= qd_fish(sdp
, qda
+ num_qd
);
1137 if (error
|| !qda
[num_qd
])
1139 if (++num_qd
== max_qd
)
1145 error
= do_sync(num_qd
, qda
);
1147 for (x
= 0; x
< num_qd
; x
++)
1148 qda
[x
]->qd_sync_gen
=
1149 sdp
->sd_quota_sync_gen
;
1151 for (x
= 0; x
< num_qd
; x
++)
1154 } while (!error
&& num_qd
== max_qd
);
1161 static int gfs2_quota_sync_timeo(struct super_block
*sb
, int type
)
1163 return gfs2_quota_sync(sb
, type
);
1166 int gfs2_quota_refresh(struct gfs2_sbd
*sdp
, int user
, u32 id
)
1168 struct gfs2_quota_data
*qd
;
1169 struct gfs2_holder q_gh
;
1172 error
= qd_get(sdp
, user
, id
, &qd
);
1176 error
= do_glock(qd
, FORCE
, &q_gh
);
1178 gfs2_glock_dq_uninit(&q_gh
);
1184 static void gfs2_quota_change_in(struct gfs2_quota_change_host
*qc
, const void *buf
)
1186 const struct gfs2_quota_change
*str
= buf
;
1188 qc
->qc_change
= be64_to_cpu(str
->qc_change
);
1189 qc
->qc_flags
= be32_to_cpu(str
->qc_flags
);
1190 qc
->qc_id
= be32_to_cpu(str
->qc_id
);
1193 int gfs2_quota_init(struct gfs2_sbd
*sdp
)
1195 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
1196 u64 size
= i_size_read(sdp
->sd_qc_inode
);
1197 unsigned int blocks
= size
>> sdp
->sd_sb
.sb_bsize_shift
;
1198 unsigned int x
, slot
= 0;
1199 unsigned int found
= 0;
1204 if (gfs2_check_internal_file_size(sdp
->sd_qc_inode
, 1, 64 << 20))
1207 sdp
->sd_quota_slots
= blocks
* sdp
->sd_qc_per_block
;
1208 sdp
->sd_quota_chunks
= DIV_ROUND_UP(sdp
->sd_quota_slots
, 8 * PAGE_SIZE
);
1212 sdp
->sd_quota_bitmap
= kcalloc(sdp
->sd_quota_chunks
,
1213 sizeof(unsigned char *), GFP_NOFS
);
1214 if (!sdp
->sd_quota_bitmap
)
1217 for (x
= 0; x
< sdp
->sd_quota_chunks
; x
++) {
1218 sdp
->sd_quota_bitmap
[x
] = kzalloc(PAGE_SIZE
, GFP_NOFS
);
1219 if (!sdp
->sd_quota_bitmap
[x
])
1223 for (x
= 0; x
< blocks
; x
++) {
1224 struct buffer_head
*bh
;
1229 error
= gfs2_extent_map(&ip
->i_inode
, x
, &new, &dblock
, &extlen
);
1234 bh
= gfs2_meta_ra(ip
->i_gl
, dblock
, extlen
);
1237 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
)) {
1242 for (y
= 0; y
< sdp
->sd_qc_per_block
&& slot
< sdp
->sd_quota_slots
;
1244 struct gfs2_quota_change_host qc
;
1245 struct gfs2_quota_data
*qd
;
1247 gfs2_quota_change_in(&qc
, bh
->b_data
+
1248 sizeof(struct gfs2_meta_header
) +
1249 y
* sizeof(struct gfs2_quota_change
));
1253 error
= qd_alloc(sdp
, (qc
.qc_flags
& GFS2_QCF_USER
),
1260 set_bit(QDF_CHANGE
, &qd
->qd_flags
);
1261 qd
->qd_change
= qc
.qc_change
;
1263 qd
->qd_slot_count
= 1;
1265 spin_lock(&qd_lru_lock
);
1266 gfs2_icbit_munge(sdp
, sdp
->sd_quota_bitmap
, slot
, 1);
1267 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
1268 atomic_inc(&sdp
->sd_quota_count
);
1269 spin_unlock(&qd_lru_lock
);
1280 fs_info(sdp
, "found %u quota changes\n", found
);
1285 gfs2_quota_cleanup(sdp
);
1289 void gfs2_quota_cleanup(struct gfs2_sbd
*sdp
)
1291 struct list_head
*head
= &sdp
->sd_quota_list
;
1292 struct gfs2_quota_data
*qd
;
1295 spin_lock(&qd_lru_lock
);
1296 while (!list_empty(head
)) {
1297 qd
= list_entry(head
->prev
, struct gfs2_quota_data
, qd_list
);
1299 if (atomic_read(&qd
->qd_count
) > 1 ||
1300 (atomic_read(&qd
->qd_count
) &&
1301 !test_bit(QDF_CHANGE
, &qd
->qd_flags
))) {
1302 list_move(&qd
->qd_list
, head
);
1303 spin_unlock(&qd_lru_lock
);
1305 spin_lock(&qd_lru_lock
);
1309 list_del(&qd
->qd_list
);
1310 /* Also remove if this qd exists in the reclaim list */
1311 if (!list_empty(&qd
->qd_reclaim
)) {
1312 list_del_init(&qd
->qd_reclaim
);
1313 atomic_dec(&qd_lru_count
);
1315 atomic_dec(&sdp
->sd_quota_count
);
1316 spin_unlock(&qd_lru_lock
);
1318 if (!atomic_read(&qd
->qd_count
)) {
1319 gfs2_assert_warn(sdp
, !qd
->qd_change
);
1320 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
1322 gfs2_assert_warn(sdp
, qd
->qd_slot_count
== 1);
1323 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
1325 gfs2_glock_put(qd
->qd_gl
);
1326 kmem_cache_free(gfs2_quotad_cachep
, qd
);
1328 spin_lock(&qd_lru_lock
);
1330 spin_unlock(&qd_lru_lock
);
1332 gfs2_assert_warn(sdp
, !atomic_read(&sdp
->sd_quota_count
));
1334 if (sdp
->sd_quota_bitmap
) {
1335 for (x
= 0; x
< sdp
->sd_quota_chunks
; x
++)
1336 kfree(sdp
->sd_quota_bitmap
[x
]);
1337 kfree(sdp
->sd_quota_bitmap
);
1341 static void quotad_error(struct gfs2_sbd
*sdp
, const char *msg
, int error
)
1343 if (error
== 0 || error
== -EROFS
)
1345 if (!test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
))
1346 fs_err(sdp
, "gfs2_quotad: %s error %d\n", msg
, error
);
1349 static void quotad_check_timeo(struct gfs2_sbd
*sdp
, const char *msg
,
1350 int (*fxn
)(struct super_block
*sb
, int type
),
1351 unsigned long t
, unsigned long *timeo
,
1352 unsigned int *new_timeo
)
1355 int error
= fxn(sdp
->sd_vfs
, 0);
1356 quotad_error(sdp
, msg
, error
);
1357 *timeo
= gfs2_tune_get_i(&sdp
->sd_tune
, new_timeo
) * HZ
;
1363 static void quotad_check_trunc_list(struct gfs2_sbd
*sdp
)
1365 struct gfs2_inode
*ip
;
1369 spin_lock(&sdp
->sd_trunc_lock
);
1370 if (!list_empty(&sdp
->sd_trunc_list
)) {
1371 ip
= list_entry(sdp
->sd_trunc_list
.next
,
1372 struct gfs2_inode
, i_trunc_list
);
1373 list_del_init(&ip
->i_trunc_list
);
1375 spin_unlock(&sdp
->sd_trunc_lock
);
1378 gfs2_glock_finish_truncate(ip
);
1382 void gfs2_wake_up_statfs(struct gfs2_sbd
*sdp
) {
1383 if (!sdp
->sd_statfs_force_sync
) {
1384 sdp
->sd_statfs_force_sync
= 1;
1385 wake_up(&sdp
->sd_quota_wait
);
1391 * gfs2_quotad - Write cached quota changes into the quota file
1392 * @sdp: Pointer to GFS2 superblock
1396 int gfs2_quotad(void *data
)
1398 struct gfs2_sbd
*sdp
= data
;
1399 struct gfs2_tune
*tune
= &sdp
->sd_tune
;
1400 unsigned long statfs_timeo
= 0;
1401 unsigned long quotad_timeo
= 0;
1402 unsigned long t
= 0;
1406 while (!kthread_should_stop()) {
1408 /* Update the master statfs file */
1409 if (sdp
->sd_statfs_force_sync
) {
1410 int error
= gfs2_statfs_sync(sdp
->sd_vfs
, 0);
1411 quotad_error(sdp
, "statfs", error
);
1412 statfs_timeo
= gfs2_tune_get(sdp
, gt_statfs_quantum
) * HZ
;
1415 quotad_check_timeo(sdp
, "statfs", gfs2_statfs_sync
, t
,
1417 &tune
->gt_statfs_quantum
);
1419 /* Update quota file */
1420 quotad_check_timeo(sdp
, "sync", gfs2_quota_sync_timeo
, t
,
1421 "ad_timeo
, &tune
->gt_quota_quantum
);
1423 /* Check for & recover partially truncated inodes */
1424 quotad_check_trunc_list(sdp
);
1428 t
= min(quotad_timeo
, statfs_timeo
);
1430 prepare_to_wait(&sdp
->sd_quota_wait
, &wait
, TASK_INTERRUPTIBLE
);
1431 spin_lock(&sdp
->sd_trunc_lock
);
1432 empty
= list_empty(&sdp
->sd_trunc_list
);
1433 spin_unlock(&sdp
->sd_trunc_lock
);
1434 if (empty
&& !sdp
->sd_statfs_force_sync
)
1435 t
-= schedule_timeout(t
);
1438 finish_wait(&sdp
->sd_quota_wait
, &wait
);
1444 static int gfs2_quota_get_xstate(struct super_block
*sb
,
1445 struct fs_quota_stat
*fqs
)
1447 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1449 memset(fqs
, 0, sizeof(struct fs_quota_stat
));
1450 fqs
->qs_version
= FS_QSTAT_VERSION
;
1452 switch (sdp
->sd_args
.ar_quota
) {
1454 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ENFD
| FS_QUOTA_GDQ_ENFD
);
1456 case GFS2_QUOTA_ACCOUNT
:
1457 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ACCT
| FS_QUOTA_GDQ_ACCT
);
1459 case GFS2_QUOTA_OFF
:
1463 if (sdp
->sd_quota_inode
) {
1464 fqs
->qs_uquota
.qfs_ino
= GFS2_I(sdp
->sd_quota_inode
)->i_no_addr
;
1465 fqs
->qs_uquota
.qfs_nblks
= sdp
->sd_quota_inode
->i_blocks
;
1467 fqs
->qs_uquota
.qfs_nextents
= 1; /* unsupported */
1468 fqs
->qs_gquota
= fqs
->qs_uquota
; /* its the same inode in both cases */
1469 fqs
->qs_incoredqs
= atomic_read(&qd_lru_count
);
1473 static int gfs2_get_dqblk(struct super_block
*sb
, int type
, qid_t id
,
1474 struct fs_disk_quota
*fdq
)
1476 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1477 struct gfs2_quota_lvb
*qlvb
;
1478 struct gfs2_quota_data
*qd
;
1479 struct gfs2_holder q_gh
;
1482 memset(fdq
, 0, sizeof(struct fs_disk_quota
));
1484 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1485 return -ESRCH
; /* Crazy XFS error code */
1487 if (type
== USRQUOTA
)
1489 else if (type
== GRPQUOTA
)
1494 error
= qd_get(sdp
, type
, id
, &qd
);
1497 error
= do_glock(qd
, FORCE
, &q_gh
);
1501 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lvb
;
1502 fdq
->d_version
= FS_DQUOT_VERSION
;
1503 fdq
->d_flags
= (type
== QUOTA_USER
) ? FS_USER_QUOTA
: FS_GROUP_QUOTA
;
1505 fdq
->d_blk_hardlimit
= be64_to_cpu(qlvb
->qb_limit
) << sdp
->sd_fsb2bb_shift
;
1506 fdq
->d_blk_softlimit
= be64_to_cpu(qlvb
->qb_warn
) << sdp
->sd_fsb2bb_shift
;
1507 fdq
->d_bcount
= be64_to_cpu(qlvb
->qb_value
) << sdp
->sd_fsb2bb_shift
;
1509 gfs2_glock_dq_uninit(&q_gh
);
1515 /* GFS2 only supports a subset of the XFS fields */
1516 #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
1518 static int gfs2_set_dqblk(struct super_block
*sb
, int type
, qid_t id
,
1519 struct fs_disk_quota
*fdq
)
1521 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1522 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
1523 struct gfs2_quota_data
*qd
;
1524 struct gfs2_holder q_gh
, i_gh
;
1525 unsigned int data_blocks
, ind_blocks
;
1526 unsigned int blocks
= 0;
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 error
= gfs2_rs_alloc(ip
);
1562 mutex_lock(&ip
->i_inode
.i_mutex
);
1563 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
, 0, &q_gh
);
1566 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1570 /* Check for existing entry, if none then alloc new blocks */
1571 error
= update_qd(sdp
, qd
);
1575 /* If nothing has changed, this is a no-op */
1576 if ((fdq
->d_fieldmask
& FS_DQ_BSOFT
) &&
1577 ((fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_warn
)))
1578 fdq
->d_fieldmask
^= FS_DQ_BSOFT
;
1580 if ((fdq
->d_fieldmask
& FS_DQ_BHARD
) &&
1581 ((fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_limit
)))
1582 fdq
->d_fieldmask
^= FS_DQ_BHARD
;
1584 if ((fdq
->d_fieldmask
& FS_DQ_BCOUNT
) &&
1585 ((fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_value
)))
1586 fdq
->d_fieldmask
^= FS_DQ_BCOUNT
;
1588 if (fdq
->d_fieldmask
== 0)
1591 offset
= qd2offset(qd
);
1592 alloc_required
= gfs2_write_alloc_required(ip
, offset
, sizeof(struct gfs2_quota
));
1593 if (gfs2_is_stuffed(ip
))
1595 if (alloc_required
) {
1596 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
1597 &data_blocks
, &ind_blocks
);
1598 blocks
= 1 + data_blocks
+ ind_blocks
;
1599 error
= gfs2_inplace_reserve(ip
, blocks
);
1602 blocks
+= gfs2_rg_blocks(ip
, blocks
);
1605 /* Some quotas span block boundaries and can update two blocks,
1606 adding an extra block to the transaction to handle such quotas */
1607 error
= gfs2_trans_begin(sdp
, blocks
+ RES_DINODE
+ 2, 0);
1612 error
= gfs2_adjust_quota(ip
, offset
, 0, qd
, fdq
);
1614 gfs2_trans_end(sdp
);
1617 gfs2_inplace_release(ip
);
1619 gfs2_glock_dq_uninit(&i_gh
);
1621 gfs2_glock_dq_uninit(&q_gh
);
1623 mutex_unlock(&ip
->i_inode
.i_mutex
);
1629 const struct quotactl_ops gfs2_quotactl_ops
= {
1630 .quota_sync
= gfs2_quota_sync
,
1631 .get_xstate
= gfs2_quota_get_xstate
,
1632 .get_dqblk
= gfs2_get_dqblk
,
1633 .set_dqblk
= gfs2_set_dqblk
,