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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41 #include <linux/sched.h>
42 #include <linux/slab.h>
44 #include <linux/spinlock.h>
45 #include <linux/completion.h>
46 #include <linux/buffer_head.h>
47 #include <linux/sort.h>
49 #include <linux/bio.h>
50 #include <linux/gfs2_ondisk.h>
51 #include <linux/kthread.h>
52 #include <linux/freezer.h>
53 #include <linux/quota.h>
54 #include <linux/dqblk_xfs.h>
55 #include <linux/lockref.h>
56 #include <linux/list_lru.h>
57 #include <linux/rcupdate.h>
58 #include <linux/rculist_bl.h>
59 #include <linux/bit_spinlock.h>
60 #include <linux/jhash.h>
61 #include <linux/vmalloc.h>
77 #define GFS2_QD_HASH_SHIFT 12
78 #define GFS2_QD_HASH_SIZE (1 << GFS2_QD_HASH_SHIFT)
79 #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1)
81 /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */
82 /* -> sd_bitmap_lock */
83 static DEFINE_SPINLOCK(qd_lock
);
84 struct list_lru gfs2_qd_lru
;
86 static struct hlist_bl_head qd_hash_table
[GFS2_QD_HASH_SIZE
];
88 static unsigned int gfs2_qd_hash(const struct gfs2_sbd
*sdp
,
89 const struct kqid qid
)
93 h
= jhash(&sdp
, sizeof(struct gfs2_sbd
*), 0);
94 h
= jhash(&qid
, sizeof(struct kqid
), h
);
96 return h
& GFS2_QD_HASH_MASK
;
99 static inline void spin_lock_bucket(unsigned int hash
)
101 hlist_bl_lock(&qd_hash_table
[hash
]);
104 static inline void spin_unlock_bucket(unsigned int hash
)
106 hlist_bl_unlock(&qd_hash_table
[hash
]);
109 static void gfs2_qd_dealloc(struct rcu_head
*rcu
)
111 struct gfs2_quota_data
*qd
= container_of(rcu
, struct gfs2_quota_data
, qd_rcu
);
112 kmem_cache_free(gfs2_quotad_cachep
, qd
);
115 static void gfs2_qd_dispose(struct list_head
*list
)
117 struct gfs2_quota_data
*qd
;
118 struct gfs2_sbd
*sdp
;
120 while (!list_empty(list
)) {
121 qd
= list_entry(list
->next
, struct gfs2_quota_data
, qd_lru
);
122 sdp
= qd
->qd_gl
->gl_sbd
;
124 list_del(&qd
->qd_lru
);
126 /* Free from the filesystem-specific list */
128 list_del(&qd
->qd_list
);
129 spin_unlock(&qd_lock
);
131 spin_lock_bucket(qd
->qd_hash
);
132 hlist_bl_del_rcu(&qd
->qd_hlist
);
133 spin_unlock_bucket(qd
->qd_hash
);
135 gfs2_assert_warn(sdp
, !qd
->qd_change
);
136 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
137 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
139 gfs2_glock_put(qd
->qd_gl
);
140 atomic_dec(&sdp
->sd_quota_count
);
142 /* Delete it from the common reclaim list */
143 call_rcu(&qd
->qd_rcu
, gfs2_qd_dealloc
);
148 static enum lru_status
gfs2_qd_isolate(struct list_head
*item
, spinlock_t
*lock
, void *arg
)
150 struct list_head
*dispose
= arg
;
151 struct gfs2_quota_data
*qd
= list_entry(item
, struct gfs2_quota_data
, qd_lru
);
153 if (!spin_trylock(&qd
->qd_lockref
.lock
))
156 if (qd
->qd_lockref
.count
== 0) {
157 lockref_mark_dead(&qd
->qd_lockref
);
158 list_move(&qd
->qd_lru
, dispose
);
161 spin_unlock(&qd
->qd_lockref
.lock
);
165 static unsigned long gfs2_qd_shrink_scan(struct shrinker
*shrink
,
166 struct shrink_control
*sc
)
171 if (!(sc
->gfp_mask
& __GFP_FS
))
174 freed
= list_lru_walk_node(&gfs2_qd_lru
, sc
->nid
, gfs2_qd_isolate
,
175 &dispose
, &sc
->nr_to_scan
);
177 gfs2_qd_dispose(&dispose
);
182 static unsigned long gfs2_qd_shrink_count(struct shrinker
*shrink
,
183 struct shrink_control
*sc
)
185 return vfs_pressure_ratio(list_lru_count_node(&gfs2_qd_lru
, sc
->nid
));
188 struct shrinker gfs2_qd_shrinker
= {
189 .count_objects
= gfs2_qd_shrink_count
,
190 .scan_objects
= gfs2_qd_shrink_scan
,
191 .seeks
= DEFAULT_SEEKS
,
192 .flags
= SHRINKER_NUMA_AWARE
,
196 static u64
qd2index(struct gfs2_quota_data
*qd
)
198 struct kqid qid
= qd
->qd_id
;
199 return (2 * (u64
)from_kqid(&init_user_ns
, qid
)) +
200 ((qid
.type
== USRQUOTA
) ? 0 : 1);
203 static u64
qd2offset(struct gfs2_quota_data
*qd
)
207 offset
= qd2index(qd
);
208 offset
*= sizeof(struct gfs2_quota
);
213 static struct gfs2_quota_data
*qd_alloc(unsigned hash
, struct gfs2_sbd
*sdp
, struct kqid qid
)
215 struct gfs2_quota_data
*qd
;
218 qd
= kmem_cache_zalloc(gfs2_quotad_cachep
, GFP_NOFS
);
223 qd
->qd_lockref
.count
= 1;
224 spin_lock_init(&qd
->qd_lockref
.lock
);
227 INIT_LIST_HEAD(&qd
->qd_lru
);
230 error
= gfs2_glock_get(sdp
, qd2index(qd
),
231 &gfs2_quota_glops
, CREATE
, &qd
->qd_gl
);
238 kmem_cache_free(gfs2_quotad_cachep
, qd
);
242 static struct gfs2_quota_data
*gfs2_qd_search_bucket(unsigned int hash
,
243 const struct gfs2_sbd
*sdp
,
246 struct gfs2_quota_data
*qd
;
247 struct hlist_bl_node
*h
;
249 hlist_bl_for_each_entry_rcu(qd
, h
, &qd_hash_table
[hash
], qd_hlist
) {
250 if (!qid_eq(qd
->qd_id
, qid
))
252 if (qd
->qd_sbd
!= sdp
)
254 if (lockref_get_not_dead(&qd
->qd_lockref
)) {
255 list_lru_del(&gfs2_qd_lru
, &qd
->qd_lru
);
264 static int qd_get(struct gfs2_sbd
*sdp
, struct kqid qid
,
265 struct gfs2_quota_data
**qdp
)
267 struct gfs2_quota_data
*qd
, *new_qd
;
268 unsigned int hash
= gfs2_qd_hash(sdp
, qid
);
271 *qdp
= qd
= gfs2_qd_search_bucket(hash
, sdp
, qid
);
277 new_qd
= qd_alloc(hash
, sdp
, qid
);
282 spin_lock_bucket(hash
);
283 *qdp
= qd
= gfs2_qd_search_bucket(hash
, sdp
, qid
);
286 list_add(&new_qd
->qd_list
, &sdp
->sd_quota_list
);
287 hlist_bl_add_head_rcu(&new_qd
->qd_hlist
, &qd_hash_table
[hash
]);
288 atomic_inc(&sdp
->sd_quota_count
);
290 spin_unlock_bucket(hash
);
291 spin_unlock(&qd_lock
);
294 gfs2_glock_put(new_qd
->qd_gl
);
295 kmem_cache_free(gfs2_quotad_cachep
, new_qd
);
302 static void qd_hold(struct gfs2_quota_data
*qd
)
304 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
305 gfs2_assert(sdp
, !__lockref_is_dead(&qd
->qd_lockref
));
306 lockref_get(&qd
->qd_lockref
);
309 static void qd_put(struct gfs2_quota_data
*qd
)
311 if (lockref_put_or_lock(&qd
->qd_lockref
))
314 qd
->qd_lockref
.count
= 0;
315 list_lru_add(&gfs2_qd_lru
, &qd
->qd_lru
);
316 spin_unlock(&qd
->qd_lockref
.lock
);
320 static int slot_get(struct gfs2_quota_data
*qd
)
322 struct gfs2_sbd
*sdp
= qd
->qd_sbd
;
326 spin_lock(&sdp
->sd_bitmap_lock
);
327 if (qd
->qd_slot_count
!= 0)
331 bit
= find_first_zero_bit(sdp
->sd_quota_bitmap
, sdp
->sd_quota_slots
);
332 if (bit
< sdp
->sd_quota_slots
) {
333 set_bit(bit
, sdp
->sd_quota_bitmap
);
339 spin_unlock(&sdp
->sd_bitmap_lock
);
344 static void slot_hold(struct gfs2_quota_data
*qd
)
346 struct gfs2_sbd
*sdp
= qd
->qd_sbd
;
348 spin_lock(&sdp
->sd_bitmap_lock
);
349 gfs2_assert(sdp
, qd
->qd_slot_count
);
351 spin_unlock(&sdp
->sd_bitmap_lock
);
354 static void slot_put(struct gfs2_quota_data
*qd
)
356 struct gfs2_sbd
*sdp
= qd
->qd_sbd
;
358 spin_lock(&sdp
->sd_bitmap_lock
);
359 gfs2_assert(sdp
, qd
->qd_slot_count
);
360 if (!--qd
->qd_slot_count
) {
361 BUG_ON(!test_and_clear_bit(qd
->qd_slot
, sdp
->sd_quota_bitmap
));
364 spin_unlock(&sdp
->sd_bitmap_lock
);
367 static int bh_get(struct gfs2_quota_data
*qd
)
369 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
370 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
371 unsigned int block
, offset
;
372 struct buffer_head
*bh
;
374 struct buffer_head bh_map
= { .b_state
= 0, .b_blocknr
= 0 };
376 mutex_lock(&sdp
->sd_quota_mutex
);
378 if (qd
->qd_bh_count
++) {
379 mutex_unlock(&sdp
->sd_quota_mutex
);
383 block
= qd
->qd_slot
/ sdp
->sd_qc_per_block
;
384 offset
= qd
->qd_slot
% sdp
->sd_qc_per_block
;
386 bh_map
.b_size
= 1 << ip
->i_inode
.i_blkbits
;
387 error
= gfs2_block_map(&ip
->i_inode
, block
, &bh_map
, 0);
390 error
= gfs2_meta_read(ip
->i_gl
, bh_map
.b_blocknr
, DIO_WAIT
, &bh
);
394 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
))
398 qd
->qd_bh_qc
= (struct gfs2_quota_change
*)
399 (bh
->b_data
+ sizeof(struct gfs2_meta_header
) +
400 offset
* sizeof(struct gfs2_quota_change
));
402 mutex_unlock(&sdp
->sd_quota_mutex
);
410 mutex_unlock(&sdp
->sd_quota_mutex
);
414 static void bh_put(struct gfs2_quota_data
*qd
)
416 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
418 mutex_lock(&sdp
->sd_quota_mutex
);
419 gfs2_assert(sdp
, qd
->qd_bh_count
);
420 if (!--qd
->qd_bh_count
) {
425 mutex_unlock(&sdp
->sd_quota_mutex
);
428 static int qd_check_sync(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
,
431 if (test_bit(QDF_LOCKED
, &qd
->qd_flags
) ||
432 !test_bit(QDF_CHANGE
, &qd
->qd_flags
) ||
433 (sync_gen
&& (qd
->qd_sync_gen
>= *sync_gen
)))
436 if (!lockref_get_not_dead(&qd
->qd_lockref
))
439 list_move_tail(&qd
->qd_list
, &sdp
->sd_quota_list
);
440 set_bit(QDF_LOCKED
, &qd
->qd_flags
);
441 qd
->qd_change_sync
= qd
->qd_change
;
446 static int qd_fish(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
**qdp
)
448 struct gfs2_quota_data
*qd
= NULL
;
454 if (sdp
->sd_vfs
->s_flags
& MS_RDONLY
)
459 list_for_each_entry(qd
, &sdp
->sd_quota_list
, qd_list
) {
460 found
= qd_check_sync(sdp
, qd
, &sdp
->sd_quota_sync_gen
);
468 spin_unlock(&qd_lock
);
471 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
474 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
486 static void qd_unlock(struct gfs2_quota_data
*qd
)
488 gfs2_assert_warn(qd
->qd_gl
->gl_sbd
,
489 test_bit(QDF_LOCKED
, &qd
->qd_flags
));
490 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
496 static int qdsb_get(struct gfs2_sbd
*sdp
, struct kqid qid
,
497 struct gfs2_quota_data
**qdp
)
501 error
= qd_get(sdp
, qid
, qdp
);
505 error
= slot_get(*qdp
);
509 error
= bh_get(*qdp
);
522 static void qdsb_put(struct gfs2_quota_data
*qd
)
529 int gfs2_quota_hold(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
531 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
532 struct gfs2_quota_data
**qd
;
535 if (ip
->i_res
== NULL
) {
536 error
= gfs2_rs_alloc(ip
);
541 qd
= ip
->i_res
->rs_qa_qd
;
543 if (gfs2_assert_warn(sdp
, !ip
->i_res
->rs_qa_qd_num
) ||
544 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
)))
547 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
550 error
= qdsb_get(sdp
, make_kqid_uid(ip
->i_inode
.i_uid
), qd
);
553 ip
->i_res
->rs_qa_qd_num
++;
556 error
= qdsb_get(sdp
, make_kqid_gid(ip
->i_inode
.i_gid
), qd
);
559 ip
->i_res
->rs_qa_qd_num
++;
562 if (!uid_eq(uid
, NO_UID_QUOTA_CHANGE
) &&
563 !uid_eq(uid
, ip
->i_inode
.i_uid
)) {
564 error
= qdsb_get(sdp
, make_kqid_uid(uid
), qd
);
567 ip
->i_res
->rs_qa_qd_num
++;
571 if (!gid_eq(gid
, NO_GID_QUOTA_CHANGE
) &&
572 !gid_eq(gid
, ip
->i_inode
.i_gid
)) {
573 error
= qdsb_get(sdp
, make_kqid_gid(gid
), qd
);
576 ip
->i_res
->rs_qa_qd_num
++;
582 gfs2_quota_unhold(ip
);
586 void gfs2_quota_unhold(struct gfs2_inode
*ip
)
588 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
591 if (ip
->i_res
== NULL
)
593 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
));
595 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
596 qdsb_put(ip
->i_res
->rs_qa_qd
[x
]);
597 ip
->i_res
->rs_qa_qd
[x
] = NULL
;
599 ip
->i_res
->rs_qa_qd_num
= 0;
602 static int sort_qd(const void *a
, const void *b
)
604 const struct gfs2_quota_data
*qd_a
= *(const struct gfs2_quota_data
**)a
;
605 const struct gfs2_quota_data
*qd_b
= *(const struct gfs2_quota_data
**)b
;
607 if (qid_lt(qd_a
->qd_id
, qd_b
->qd_id
))
609 if (qid_lt(qd_b
->qd_id
, qd_a
->qd_id
))
614 static void do_qc(struct gfs2_quota_data
*qd
, s64 change
)
616 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
617 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
618 struct gfs2_quota_change
*qc
= qd
->qd_bh_qc
;
621 mutex_lock(&sdp
->sd_quota_mutex
);
622 gfs2_trans_add_meta(ip
->i_gl
, qd
->qd_bh
);
624 if (!test_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
627 if (qd
->qd_id
.type
== USRQUOTA
)
628 qc
->qc_flags
= cpu_to_be32(GFS2_QCF_USER
);
629 qc
->qc_id
= cpu_to_be32(from_kqid(&init_user_ns
, qd
->qd_id
));
632 x
= be64_to_cpu(qc
->qc_change
) + change
;
633 qc
->qc_change
= cpu_to_be64(x
);
637 spin_unlock(&qd_lock
);
640 gfs2_assert_warn(sdp
, test_bit(QDF_CHANGE
, &qd
->qd_flags
));
641 clear_bit(QDF_CHANGE
, &qd
->qd_flags
);
646 } else if (!test_and_set_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
651 mutex_unlock(&sdp
->sd_quota_mutex
);
655 * gfs2_adjust_quota - adjust record of current block usage
656 * @ip: The quota inode
657 * @loc: Offset of the entry in the quota file
658 * @change: The amount of usage change to record
659 * @qd: The quota data
660 * @fdq: The updated limits to record
662 * This function was mostly borrowed from gfs2_block_truncate_page which was
663 * in turn mostly borrowed from ext3
665 * Returns: 0 or -ve on error
668 static int gfs2_adjust_quota(struct gfs2_inode
*ip
, loff_t loc
,
669 s64 change
, struct gfs2_quota_data
*qd
,
670 struct fs_disk_quota
*fdq
)
672 struct inode
*inode
= &ip
->i_inode
;
673 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
674 struct address_space
*mapping
= inode
->i_mapping
;
675 unsigned long index
= loc
>> PAGE_CACHE_SHIFT
;
676 unsigned offset
= loc
& (PAGE_CACHE_SIZE
- 1);
677 unsigned blocksize
, iblock
, pos
;
678 struct buffer_head
*bh
;
685 if (gfs2_is_stuffed(ip
)) {
686 err
= gfs2_unstuff_dinode(ip
, NULL
);
691 memset(&q
, 0, sizeof(struct gfs2_quota
));
692 err
= gfs2_internal_read(ip
, (char *)&q
, &loc
, sizeof(q
));
697 be64_add_cpu(&q
.qu_value
, change
);
698 qd
->qd_qb
.qb_value
= q
.qu_value
;
700 if (fdq
->d_fieldmask
& FS_DQ_BSOFT
) {
701 q
.qu_warn
= cpu_to_be64(fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
);
702 qd
->qd_qb
.qb_warn
= q
.qu_warn
;
704 if (fdq
->d_fieldmask
& FS_DQ_BHARD
) {
705 q
.qu_limit
= cpu_to_be64(fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
);
706 qd
->qd_qb
.qb_limit
= q
.qu_limit
;
708 if (fdq
->d_fieldmask
& FS_DQ_BCOUNT
) {
709 q
.qu_value
= cpu_to_be64(fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
);
710 qd
->qd_qb
.qb_value
= q
.qu_value
;
714 /* Write the quota into the quota file on disk */
716 nbytes
= sizeof(struct gfs2_quota
);
718 page
= find_or_create_page(mapping
, index
, GFP_NOFS
);
722 blocksize
= inode
->i_sb
->s_blocksize
;
723 iblock
= index
<< (PAGE_CACHE_SHIFT
- inode
->i_sb
->s_blocksize_bits
);
725 if (!page_has_buffers(page
))
726 create_empty_buffers(page
, blocksize
, 0);
728 bh
= page_buffers(page
);
730 while (offset
>= pos
) {
731 bh
= bh
->b_this_page
;
736 if (!buffer_mapped(bh
)) {
737 gfs2_block_map(inode
, iblock
, bh
, 1);
738 if (!buffer_mapped(bh
))
740 /* If it's a newly allocated disk block for quota, zero it */
742 zero_user(page
, pos
- blocksize
, bh
->b_size
);
745 if (PageUptodate(page
))
746 set_buffer_uptodate(bh
);
748 if (!buffer_uptodate(bh
)) {
749 ll_rw_block(READ
| REQ_META
, 1, &bh
);
751 if (!buffer_uptodate(bh
))
755 gfs2_trans_add_data(ip
->i_gl
, bh
);
757 kaddr
= kmap_atomic(page
);
758 if (offset
+ sizeof(struct gfs2_quota
) > PAGE_CACHE_SIZE
)
759 nbytes
= PAGE_CACHE_SIZE
- offset
;
760 memcpy(kaddr
+ offset
, ptr
, nbytes
);
761 flush_dcache_page(page
);
762 kunmap_atomic(kaddr
);
764 page_cache_release(page
);
766 /* If quota straddles page boundary, we need to update the rest of the
767 * quota at the beginning of the next page */
768 if ((offset
+ sizeof(struct gfs2_quota
)) > PAGE_CACHE_SIZE
) {
770 nbytes
= sizeof(struct gfs2_quota
) - nbytes
;
776 size
= loc
+ sizeof(struct gfs2_quota
);
777 if (size
> inode
->i_size
)
778 i_size_write(inode
, size
);
779 inode
->i_mtime
= inode
->i_atime
= CURRENT_TIME
;
780 mark_inode_dirty(inode
);
785 page_cache_release(page
);
789 static int do_sync(unsigned int num_qd
, struct gfs2_quota_data
**qda
)
791 struct gfs2_sbd
*sdp
= (*qda
)->qd_gl
->gl_sbd
;
792 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
793 struct gfs2_alloc_parms ap
= { .aflags
= 0, };
794 unsigned int data_blocks
, ind_blocks
;
795 struct gfs2_holder
*ghs
, i_gh
;
797 struct gfs2_quota_data
*qd
;
800 unsigned int nalloc
= 0, blocks
;
803 error
= gfs2_rs_alloc(ip
);
807 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
808 &data_blocks
, &ind_blocks
);
810 ghs
= kcalloc(num_qd
, sizeof(struct gfs2_holder
), GFP_NOFS
);
814 sort(qda
, num_qd
, sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
815 mutex_lock(&ip
->i_inode
.i_mutex
);
816 for (qx
= 0; qx
< num_qd
; qx
++) {
817 error
= gfs2_glock_nq_init(qda
[qx
]->qd_gl
, LM_ST_EXCLUSIVE
,
818 GL_NOCACHE
, &ghs
[qx
]);
823 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
827 for (x
= 0; x
< num_qd
; x
++) {
828 offset
= qd2offset(qda
[x
]);
829 if (gfs2_write_alloc_required(ip
, offset
,
830 sizeof(struct gfs2_quota
)))
835 * 1 blk for unstuffing inode if stuffed. We add this extra
836 * block to the reservation unconditionally. If the inode
837 * doesn't need unstuffing, the block will be released to the
838 * rgrp since it won't be allocated during the transaction
840 /* +3 in the end for unstuffing block, inode size update block
841 * and another block in case quota straddles page boundary and
842 * two blocks need to be updated instead of 1 */
843 blocks
= num_qd
* data_blocks
+ RES_DINODE
+ num_qd
+ 3;
845 reserved
= 1 + (nalloc
* (data_blocks
+ ind_blocks
));
846 ap
.target
= reserved
;
847 error
= gfs2_inplace_reserve(ip
, &ap
);
852 blocks
+= gfs2_rg_blocks(ip
, reserved
) + nalloc
* ind_blocks
+ RES_STATFS
;
854 error
= gfs2_trans_begin(sdp
, blocks
, 0);
858 for (x
= 0; x
< num_qd
; x
++) {
860 offset
= qd2offset(qd
);
861 error
= gfs2_adjust_quota(ip
, offset
, qd
->qd_change_sync
, qd
, NULL
);
865 do_qc(qd
, -qd
->qd_change_sync
);
866 set_bit(QDF_REFRESH
, &qd
->qd_flags
);
874 gfs2_inplace_release(ip
);
876 gfs2_glock_dq_uninit(&i_gh
);
879 gfs2_glock_dq_uninit(&ghs
[qx
]);
880 mutex_unlock(&ip
->i_inode
.i_mutex
);
882 gfs2_log_flush(ip
->i_gl
->gl_sbd
, ip
->i_gl
);
886 static int update_qd(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
)
888 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
890 struct gfs2_quota_lvb
*qlvb
;
894 memset(&q
, 0, sizeof(struct gfs2_quota
));
896 error
= gfs2_internal_read(ip
, (char *)&q
, &pos
, sizeof(q
));
900 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
901 qlvb
->qb_magic
= cpu_to_be32(GFS2_MAGIC
);
903 qlvb
->qb_limit
= q
.qu_limit
;
904 qlvb
->qb_warn
= q
.qu_warn
;
905 qlvb
->qb_value
= q
.qu_value
;
911 static int do_glock(struct gfs2_quota_data
*qd
, int force_refresh
,
912 struct gfs2_holder
*q_gh
)
914 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
915 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
916 struct gfs2_holder i_gh
;
920 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_SHARED
, 0, q_gh
);
924 qd
->qd_qb
= *(struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
926 if (force_refresh
|| qd
->qd_qb
.qb_magic
!= cpu_to_be32(GFS2_MAGIC
)) {
927 gfs2_glock_dq_uninit(q_gh
);
928 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
,
933 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
937 error
= update_qd(sdp
, qd
);
941 gfs2_glock_dq_uninit(&i_gh
);
942 gfs2_glock_dq_uninit(q_gh
);
950 gfs2_glock_dq_uninit(&i_gh
);
952 gfs2_glock_dq_uninit(q_gh
);
956 int gfs2_quota_lock(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
958 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
959 struct gfs2_quota_data
*qd
;
963 error
= gfs2_quota_hold(ip
, uid
, gid
);
967 if (capable(CAP_SYS_RESOURCE
) ||
968 sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
971 sort(ip
->i_res
->rs_qa_qd
, ip
->i_res
->rs_qa_qd_num
,
972 sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
974 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
975 int force
= NO_FORCE
;
976 qd
= ip
->i_res
->rs_qa_qd
[x
];
977 if (test_and_clear_bit(QDF_REFRESH
, &qd
->qd_flags
))
979 error
= do_glock(qd
, force
, &ip
->i_res
->rs_qa_qd_ghs
[x
]);
985 set_bit(GIF_QD_LOCKED
, &ip
->i_flags
);
988 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
989 gfs2_quota_unhold(ip
);
995 static int need_sync(struct gfs2_quota_data
*qd
)
997 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
998 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
1000 unsigned int num
, den
;
1003 if (!qd
->qd_qb
.qb_limit
)
1006 spin_lock(&qd_lock
);
1007 value
= qd
->qd_change
;
1008 spin_unlock(&qd_lock
);
1010 spin_lock(>
->gt_spin
);
1011 num
= gt
->gt_quota_scale_num
;
1012 den
= gt
->gt_quota_scale_den
;
1013 spin_unlock(>
->gt_spin
);
1017 else if ((s64
)be64_to_cpu(qd
->qd_qb
.qb_value
) >=
1018 (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1021 value
*= gfs2_jindex_size(sdp
) * num
;
1022 value
= div_s64(value
, den
);
1023 value
+= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1024 if (value
< (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1031 void gfs2_quota_unlock(struct gfs2_inode
*ip
)
1033 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1034 struct gfs2_quota_data
*qda
[4];
1035 unsigned int count
= 0;
1039 if (!test_and_clear_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1042 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1043 struct gfs2_quota_data
*qd
;
1046 qd
= ip
->i_res
->rs_qa_qd
[x
];
1047 sync
= need_sync(qd
);
1049 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
1053 spin_lock(&qd_lock
);
1054 found
= qd_check_sync(sdp
, qd
, NULL
);
1055 spin_unlock(&qd_lock
);
1060 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
1062 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
1072 do_sync(count
, qda
);
1073 for (x
= 0; x
< count
; x
++)
1078 gfs2_quota_unhold(ip
);
1081 #define MAX_LINE 256
1083 static int print_message(struct gfs2_quota_data
*qd
, char *type
)
1085 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
1087 fs_info(sdp
, "quota %s for %s %u\n",
1089 (qd
->qd_id
.type
== USRQUOTA
) ? "user" : "group",
1090 from_kqid(&init_user_ns
, qd
->qd_id
));
1095 int gfs2_quota_check(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
1097 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1098 struct gfs2_quota_data
*qd
;
1103 if (!test_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1106 if (sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
1109 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1110 qd
= ip
->i_res
->rs_qa_qd
[x
];
1112 if (!(qid_eq(qd
->qd_id
, make_kqid_uid(uid
)) ||
1113 qid_eq(qd
->qd_id
, make_kqid_gid(gid
))))
1116 value
= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1117 spin_lock(&qd_lock
);
1118 value
+= qd
->qd_change
;
1119 spin_unlock(&qd_lock
);
1121 if (be64_to_cpu(qd
->qd_qb
.qb_limit
) && (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
) < value
) {
1122 print_message(qd
, "exceeded");
1123 quota_send_warning(qd
->qd_id
,
1124 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BHARDWARN
);
1128 } else if (be64_to_cpu(qd
->qd_qb
.qb_warn
) &&
1129 (s64
)be64_to_cpu(qd
->qd_qb
.qb_warn
) < value
&&
1130 time_after_eq(jiffies
, qd
->qd_last_warn
+
1132 gt_quota_warn_period
) * HZ
)) {
1133 quota_send_warning(qd
->qd_id
,
1134 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BSOFTWARN
);
1135 error
= print_message(qd
, "warning");
1136 qd
->qd_last_warn
= jiffies
;
1143 void gfs2_quota_change(struct gfs2_inode
*ip
, s64 change
,
1144 kuid_t uid
, kgid_t gid
)
1146 struct gfs2_quota_data
*qd
;
1149 if (gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), change
))
1151 if (ip
->i_diskflags
& GFS2_DIF_SYSTEM
)
1154 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1155 qd
= ip
->i_res
->rs_qa_qd
[x
];
1157 if (qid_eq(qd
->qd_id
, make_kqid_uid(uid
)) ||
1158 qid_eq(qd
->qd_id
, make_kqid_gid(gid
))) {
1164 int gfs2_quota_sync(struct super_block
*sb
, int type
)
1166 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1167 struct gfs2_quota_data
**qda
;
1168 unsigned int max_qd
= PAGE_SIZE
/sizeof(struct gfs2_holder
);
1169 unsigned int num_qd
;
1173 qda
= kcalloc(max_qd
, sizeof(struct gfs2_quota_data
*), GFP_KERNEL
);
1177 mutex_lock(&sdp
->sd_quota_sync_mutex
);
1178 sdp
->sd_quota_sync_gen
++;
1184 error
= qd_fish(sdp
, qda
+ num_qd
);
1185 if (error
|| !qda
[num_qd
])
1187 if (++num_qd
== max_qd
)
1193 error
= do_sync(num_qd
, qda
);
1195 for (x
= 0; x
< num_qd
; x
++)
1196 qda
[x
]->qd_sync_gen
=
1197 sdp
->sd_quota_sync_gen
;
1199 for (x
= 0; x
< num_qd
; x
++)
1202 } while (!error
&& num_qd
== max_qd
);
1204 mutex_unlock(&sdp
->sd_quota_sync_mutex
);
1210 int gfs2_quota_refresh(struct gfs2_sbd
*sdp
, struct kqid qid
)
1212 struct gfs2_quota_data
*qd
;
1213 struct gfs2_holder q_gh
;
1216 error
= qd_get(sdp
, qid
, &qd
);
1220 error
= do_glock(qd
, FORCE
, &q_gh
);
1222 gfs2_glock_dq_uninit(&q_gh
);
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;
1236 unsigned int bm_size
;
1241 if (gfs2_check_internal_file_size(sdp
->sd_qc_inode
, 1, 64 << 20))
1244 sdp
->sd_quota_slots
= blocks
* sdp
->sd_qc_per_block
;
1245 bm_size
= DIV_ROUND_UP(sdp
->sd_quota_slots
, 8 * sizeof(unsigned long));
1246 bm_size
*= sizeof(unsigned long);
1248 sdp
->sd_quota_bitmap
= kzalloc(bm_size
, GFP_NOFS
| __GFP_NOWARN
);
1249 if (sdp
->sd_quota_bitmap
== NULL
)
1250 sdp
->sd_quota_bitmap
= __vmalloc(bm_size
, GFP_NOFS
|
1251 __GFP_ZERO
, PAGE_KERNEL
);
1252 if (!sdp
->sd_quota_bitmap
)
1255 for (x
= 0; x
< blocks
; x
++) {
1256 struct buffer_head
*bh
;
1257 const struct gfs2_quota_change
*qc
;
1262 error
= gfs2_extent_map(&ip
->i_inode
, x
, &new, &dblock
, &extlen
);
1267 bh
= gfs2_meta_ra(ip
->i_gl
, dblock
, extlen
);
1270 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
)) {
1275 qc
= (const struct gfs2_quota_change
*)(bh
->b_data
+ sizeof(struct gfs2_meta_header
));
1276 for (y
= 0; y
< sdp
->sd_qc_per_block
&& slot
< sdp
->sd_quota_slots
;
1278 struct gfs2_quota_data
*qd
;
1279 s64 qc_change
= be64_to_cpu(qc
->qc_change
);
1280 u32 qc_flags
= be32_to_cpu(qc
->qc_flags
);
1281 enum quota_type qtype
= (qc_flags
& GFS2_QCF_USER
) ?
1282 USRQUOTA
: GRPQUOTA
;
1283 struct kqid qc_id
= make_kqid(&init_user_ns
, qtype
,
1284 be32_to_cpu(qc
->qc_id
));
1289 hash
= gfs2_qd_hash(sdp
, qc_id
);
1290 qd
= qd_alloc(hash
, sdp
, qc_id
);
1296 set_bit(QDF_CHANGE
, &qd
->qd_flags
);
1297 qd
->qd_change
= qc_change
;
1299 qd
->qd_slot_count
= 1;
1301 spin_lock(&qd_lock
);
1302 BUG_ON(test_and_set_bit(slot
, sdp
->sd_quota_bitmap
));
1303 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
1304 atomic_inc(&sdp
->sd_quota_count
);
1305 spin_unlock(&qd_lock
);
1307 spin_lock_bucket(hash
);
1308 hlist_bl_add_head_rcu(&qd
->qd_hlist
, &qd_hash_table
[hash
]);
1309 spin_unlock_bucket(hash
);
1320 fs_info(sdp
, "found %u quota changes\n", found
);
1325 gfs2_quota_cleanup(sdp
);
1329 void gfs2_quota_cleanup(struct gfs2_sbd
*sdp
)
1331 struct list_head
*head
= &sdp
->sd_quota_list
;
1332 struct gfs2_quota_data
*qd
;
1334 spin_lock(&qd_lock
);
1335 while (!list_empty(head
)) {
1336 qd
= list_entry(head
->prev
, struct gfs2_quota_data
, qd_list
);
1338 list_del(&qd
->qd_list
);
1340 /* Also remove if this qd exists in the reclaim list */
1341 list_lru_del(&gfs2_qd_lru
, &qd
->qd_lru
);
1342 atomic_dec(&sdp
->sd_quota_count
);
1343 spin_unlock(&qd_lock
);
1345 spin_lock_bucket(qd
->qd_hash
);
1346 hlist_bl_del_rcu(&qd
->qd_hlist
);
1347 spin_unlock_bucket(qd
->qd_hash
);
1349 gfs2_assert_warn(sdp
, !qd
->qd_change
);
1350 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
1351 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
1353 gfs2_glock_put(qd
->qd_gl
);
1354 call_rcu(&qd
->qd_rcu
, gfs2_qd_dealloc
);
1356 spin_lock(&qd_lock
);
1358 spin_unlock(&qd_lock
);
1360 gfs2_assert_warn(sdp
, !atomic_read(&sdp
->sd_quota_count
));
1362 if (sdp
->sd_quota_bitmap
) {
1363 if (is_vmalloc_addr(sdp
->sd_quota_bitmap
))
1364 vfree(sdp
->sd_quota_bitmap
);
1366 kfree(sdp
->sd_quota_bitmap
);
1367 sdp
->sd_quota_bitmap
= NULL
;
1371 static void quotad_error(struct gfs2_sbd
*sdp
, const char *msg
, int error
)
1373 if (error
== 0 || error
== -EROFS
)
1375 if (!test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
))
1376 fs_err(sdp
, "gfs2_quotad: %s error %d\n", msg
, error
);
1379 static void quotad_check_timeo(struct gfs2_sbd
*sdp
, const char *msg
,
1380 int (*fxn
)(struct super_block
*sb
, int type
),
1381 unsigned long t
, unsigned long *timeo
,
1382 unsigned int *new_timeo
)
1385 int error
= fxn(sdp
->sd_vfs
, 0);
1386 quotad_error(sdp
, msg
, error
);
1387 *timeo
= gfs2_tune_get_i(&sdp
->sd_tune
, new_timeo
) * HZ
;
1393 static void quotad_check_trunc_list(struct gfs2_sbd
*sdp
)
1395 struct gfs2_inode
*ip
;
1399 spin_lock(&sdp
->sd_trunc_lock
);
1400 if (!list_empty(&sdp
->sd_trunc_list
)) {
1401 ip
= list_entry(sdp
->sd_trunc_list
.next
,
1402 struct gfs2_inode
, i_trunc_list
);
1403 list_del_init(&ip
->i_trunc_list
);
1405 spin_unlock(&sdp
->sd_trunc_lock
);
1408 gfs2_glock_finish_truncate(ip
);
1412 void gfs2_wake_up_statfs(struct gfs2_sbd
*sdp
) {
1413 if (!sdp
->sd_statfs_force_sync
) {
1414 sdp
->sd_statfs_force_sync
= 1;
1415 wake_up(&sdp
->sd_quota_wait
);
1421 * gfs2_quotad - Write cached quota changes into the quota file
1422 * @sdp: Pointer to GFS2 superblock
1426 int gfs2_quotad(void *data
)
1428 struct gfs2_sbd
*sdp
= data
;
1429 struct gfs2_tune
*tune
= &sdp
->sd_tune
;
1430 unsigned long statfs_timeo
= 0;
1431 unsigned long quotad_timeo
= 0;
1432 unsigned long t
= 0;
1436 while (!kthread_should_stop()) {
1438 /* Update the master statfs file */
1439 if (sdp
->sd_statfs_force_sync
) {
1440 int error
= gfs2_statfs_sync(sdp
->sd_vfs
, 0);
1441 quotad_error(sdp
, "statfs", error
);
1442 statfs_timeo
= gfs2_tune_get(sdp
, gt_statfs_quantum
) * HZ
;
1445 quotad_check_timeo(sdp
, "statfs", gfs2_statfs_sync
, t
,
1447 &tune
->gt_statfs_quantum
);
1449 /* Update quota file */
1450 quotad_check_timeo(sdp
, "sync", gfs2_quota_sync
, t
,
1451 "ad_timeo
, &tune
->gt_quota_quantum
);
1453 /* Check for & recover partially truncated inodes */
1454 quotad_check_trunc_list(sdp
);
1458 t
= min(quotad_timeo
, statfs_timeo
);
1460 prepare_to_wait(&sdp
->sd_quota_wait
, &wait
, TASK_INTERRUPTIBLE
);
1461 spin_lock(&sdp
->sd_trunc_lock
);
1462 empty
= list_empty(&sdp
->sd_trunc_list
);
1463 spin_unlock(&sdp
->sd_trunc_lock
);
1464 if (empty
&& !sdp
->sd_statfs_force_sync
)
1465 t
-= schedule_timeout(t
);
1468 finish_wait(&sdp
->sd_quota_wait
, &wait
);
1474 static int gfs2_quota_get_xstate(struct super_block
*sb
,
1475 struct fs_quota_stat
*fqs
)
1477 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1479 memset(fqs
, 0, sizeof(struct fs_quota_stat
));
1480 fqs
->qs_version
= FS_QSTAT_VERSION
;
1482 switch (sdp
->sd_args
.ar_quota
) {
1484 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ENFD
| FS_QUOTA_GDQ_ENFD
);
1486 case GFS2_QUOTA_ACCOUNT
:
1487 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ACCT
| FS_QUOTA_GDQ_ACCT
);
1489 case GFS2_QUOTA_OFF
:
1493 if (sdp
->sd_quota_inode
) {
1494 fqs
->qs_uquota
.qfs_ino
= GFS2_I(sdp
->sd_quota_inode
)->i_no_addr
;
1495 fqs
->qs_uquota
.qfs_nblks
= sdp
->sd_quota_inode
->i_blocks
;
1497 fqs
->qs_uquota
.qfs_nextents
= 1; /* unsupported */
1498 fqs
->qs_gquota
= fqs
->qs_uquota
; /* its the same inode in both cases */
1499 fqs
->qs_incoredqs
= list_lru_count(&gfs2_qd_lru
);
1503 static int gfs2_get_dqblk(struct super_block
*sb
, struct kqid qid
,
1504 struct fs_disk_quota
*fdq
)
1506 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1507 struct gfs2_quota_lvb
*qlvb
;
1508 struct gfs2_quota_data
*qd
;
1509 struct gfs2_holder q_gh
;
1512 memset(fdq
, 0, sizeof(struct fs_disk_quota
));
1514 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1515 return -ESRCH
; /* Crazy XFS error code */
1517 if ((qid
.type
!= USRQUOTA
) &&
1518 (qid
.type
!= GRPQUOTA
))
1521 error
= qd_get(sdp
, qid
, &qd
);
1524 error
= do_glock(qd
, FORCE
, &q_gh
);
1528 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
1529 fdq
->d_version
= FS_DQUOT_VERSION
;
1530 fdq
->d_flags
= (qid
.type
== USRQUOTA
) ? FS_USER_QUOTA
: FS_GROUP_QUOTA
;
1531 fdq
->d_id
= from_kqid_munged(current_user_ns(), qid
);
1532 fdq
->d_blk_hardlimit
= be64_to_cpu(qlvb
->qb_limit
) << sdp
->sd_fsb2bb_shift
;
1533 fdq
->d_blk_softlimit
= be64_to_cpu(qlvb
->qb_warn
) << sdp
->sd_fsb2bb_shift
;
1534 fdq
->d_bcount
= be64_to_cpu(qlvb
->qb_value
) << sdp
->sd_fsb2bb_shift
;
1536 gfs2_glock_dq_uninit(&q_gh
);
1542 /* GFS2 only supports a subset of the XFS fields */
1543 #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
1545 static int gfs2_set_dqblk(struct super_block
*sb
, struct kqid qid
,
1546 struct fs_disk_quota
*fdq
)
1548 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1549 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
1550 struct gfs2_quota_data
*qd
;
1551 struct gfs2_holder q_gh
, i_gh
;
1552 unsigned int data_blocks
, ind_blocks
;
1553 unsigned int blocks
= 0;
1558 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1559 return -ESRCH
; /* Crazy XFS error code */
1561 if ((qid
.type
!= USRQUOTA
) &&
1562 (qid
.type
!= GRPQUOTA
))
1565 if (fdq
->d_fieldmask
& ~GFS2_FIELDMASK
)
1568 error
= qd_get(sdp
, qid
, &qd
);
1572 error
= gfs2_rs_alloc(ip
);
1576 mutex_lock(&ip
->i_inode
.i_mutex
);
1577 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
, 0, &q_gh
);
1580 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1584 /* Check for existing entry, if none then alloc new blocks */
1585 error
= update_qd(sdp
, qd
);
1589 /* If nothing has changed, this is a no-op */
1590 if ((fdq
->d_fieldmask
& FS_DQ_BSOFT
) &&
1591 ((fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_warn
)))
1592 fdq
->d_fieldmask
^= FS_DQ_BSOFT
;
1594 if ((fdq
->d_fieldmask
& FS_DQ_BHARD
) &&
1595 ((fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_limit
)))
1596 fdq
->d_fieldmask
^= FS_DQ_BHARD
;
1598 if ((fdq
->d_fieldmask
& FS_DQ_BCOUNT
) &&
1599 ((fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_value
)))
1600 fdq
->d_fieldmask
^= FS_DQ_BCOUNT
;
1602 if (fdq
->d_fieldmask
== 0)
1605 offset
= qd2offset(qd
);
1606 alloc_required
= gfs2_write_alloc_required(ip
, offset
, sizeof(struct gfs2_quota
));
1607 if (gfs2_is_stuffed(ip
))
1609 if (alloc_required
) {
1610 struct gfs2_alloc_parms ap
= { .aflags
= 0, };
1611 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
1612 &data_blocks
, &ind_blocks
);
1613 blocks
= 1 + data_blocks
+ ind_blocks
;
1615 error
= gfs2_inplace_reserve(ip
, &ap
);
1618 blocks
+= gfs2_rg_blocks(ip
, blocks
);
1621 /* Some quotas span block boundaries and can update two blocks,
1622 adding an extra block to the transaction to handle such quotas */
1623 error
= gfs2_trans_begin(sdp
, blocks
+ RES_DINODE
+ 2, 0);
1628 error
= gfs2_adjust_quota(ip
, offset
, 0, qd
, fdq
);
1630 gfs2_trans_end(sdp
);
1633 gfs2_inplace_release(ip
);
1635 gfs2_glock_dq_uninit(&i_gh
);
1637 gfs2_glock_dq_uninit(&q_gh
);
1639 mutex_unlock(&ip
->i_inode
.i_mutex
);
1645 const struct quotactl_ops gfs2_quotactl_ops
= {
1646 .quota_sync
= gfs2_quota_sync
,
1647 .get_xstate
= gfs2_quota_get_xstate
,
1648 .get_dqblk
= gfs2_get_dqblk
,
1649 .set_dqblk
= gfs2_set_dqblk
,
1652 void __init
gfs2_quota_hash_init(void)
1656 for(i
= 0; i
< GFS2_QD_HASH_SIZE
; i
++)
1657 INIT_HLIST_BL_HEAD(&qd_hash_table
[i
]);