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
);
338 spin_unlock(&sdp
->sd_bitmap_lock
);
343 static void slot_hold(struct gfs2_quota_data
*qd
)
345 struct gfs2_sbd
*sdp
= qd
->qd_sbd
;
347 spin_lock(&sdp
->sd_bitmap_lock
);
348 gfs2_assert(sdp
, qd
->qd_slot_count
);
350 spin_unlock(&sdp
->sd_bitmap_lock
);
353 static void slot_put(struct gfs2_quota_data
*qd
)
355 struct gfs2_sbd
*sdp
= qd
->qd_sbd
;
357 spin_lock(&sdp
->sd_bitmap_lock
);
358 gfs2_assert(sdp
, qd
->qd_slot_count
);
359 if (!--qd
->qd_slot_count
) {
360 BUG_ON(!test_and_clear_bit(qd
->qd_slot
, sdp
->sd_quota_bitmap
));
363 spin_unlock(&sdp
->sd_bitmap_lock
);
366 static int bh_get(struct gfs2_quota_data
*qd
)
368 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
369 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
370 unsigned int block
, offset
;
371 struct buffer_head
*bh
;
373 struct buffer_head bh_map
= { .b_state
= 0, .b_blocknr
= 0 };
375 mutex_lock(&sdp
->sd_quota_mutex
);
377 if (qd
->qd_bh_count
++) {
378 mutex_unlock(&sdp
->sd_quota_mutex
);
382 block
= qd
->qd_slot
/ sdp
->sd_qc_per_block
;
383 offset
= qd
->qd_slot
% sdp
->sd_qc_per_block
;
385 bh_map
.b_size
= 1 << ip
->i_inode
.i_blkbits
;
386 error
= gfs2_block_map(&ip
->i_inode
, block
, &bh_map
, 0);
389 error
= gfs2_meta_read(ip
->i_gl
, bh_map
.b_blocknr
, DIO_WAIT
, &bh
);
393 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
))
397 qd
->qd_bh_qc
= (struct gfs2_quota_change
*)
398 (bh
->b_data
+ sizeof(struct gfs2_meta_header
) +
399 offset
* sizeof(struct gfs2_quota_change
));
401 mutex_unlock(&sdp
->sd_quota_mutex
);
409 mutex_unlock(&sdp
->sd_quota_mutex
);
413 static void bh_put(struct gfs2_quota_data
*qd
)
415 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
417 mutex_lock(&sdp
->sd_quota_mutex
);
418 gfs2_assert(sdp
, qd
->qd_bh_count
);
419 if (!--qd
->qd_bh_count
) {
424 mutex_unlock(&sdp
->sd_quota_mutex
);
427 static int qd_check_sync(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
,
430 if (test_bit(QDF_LOCKED
, &qd
->qd_flags
) ||
431 !test_bit(QDF_CHANGE
, &qd
->qd_flags
) ||
432 (sync_gen
&& (qd
->qd_sync_gen
>= *sync_gen
)))
435 if (!lockref_get_not_dead(&qd
->qd_lockref
))
438 list_move_tail(&qd
->qd_list
, &sdp
->sd_quota_list
);
439 set_bit(QDF_LOCKED
, &qd
->qd_flags
);
440 qd
->qd_change_sync
= qd
->qd_change
;
445 static int qd_fish(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
**qdp
)
447 struct gfs2_quota_data
*qd
= NULL
;
453 if (sdp
->sd_vfs
->s_flags
& MS_RDONLY
)
458 list_for_each_entry(qd
, &sdp
->sd_quota_list
, qd_list
) {
459 found
= qd_check_sync(sdp
, qd
, &sdp
->sd_quota_sync_gen
);
467 spin_unlock(&qd_lock
);
470 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
473 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
485 static void qd_unlock(struct gfs2_quota_data
*qd
)
487 gfs2_assert_warn(qd
->qd_gl
->gl_sbd
,
488 test_bit(QDF_LOCKED
, &qd
->qd_flags
));
489 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
495 static int qdsb_get(struct gfs2_sbd
*sdp
, struct kqid qid
,
496 struct gfs2_quota_data
**qdp
)
500 error
= qd_get(sdp
, qid
, qdp
);
504 error
= slot_get(*qdp
);
508 error
= bh_get(*qdp
);
521 static void qdsb_put(struct gfs2_quota_data
*qd
)
528 int gfs2_quota_hold(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
530 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
531 struct gfs2_quota_data
**qd
;
534 if (ip
->i_res
== NULL
) {
535 error
= gfs2_rs_alloc(ip
);
540 qd
= ip
->i_res
->rs_qa_qd
;
542 if (gfs2_assert_warn(sdp
, !ip
->i_res
->rs_qa_qd_num
) ||
543 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
)))
546 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
549 error
= qdsb_get(sdp
, make_kqid_uid(ip
->i_inode
.i_uid
), qd
);
552 ip
->i_res
->rs_qa_qd_num
++;
555 error
= qdsb_get(sdp
, make_kqid_gid(ip
->i_inode
.i_gid
), qd
);
558 ip
->i_res
->rs_qa_qd_num
++;
561 if (!uid_eq(uid
, NO_UID_QUOTA_CHANGE
) &&
562 !uid_eq(uid
, ip
->i_inode
.i_uid
)) {
563 error
= qdsb_get(sdp
, make_kqid_uid(uid
), qd
);
566 ip
->i_res
->rs_qa_qd_num
++;
570 if (!gid_eq(gid
, NO_GID_QUOTA_CHANGE
) &&
571 !gid_eq(gid
, ip
->i_inode
.i_gid
)) {
572 error
= qdsb_get(sdp
, make_kqid_gid(gid
), qd
);
575 ip
->i_res
->rs_qa_qd_num
++;
581 gfs2_quota_unhold(ip
);
585 void gfs2_quota_unhold(struct gfs2_inode
*ip
)
587 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
590 if (ip
->i_res
== NULL
)
592 gfs2_assert_warn(sdp
, !test_bit(GIF_QD_LOCKED
, &ip
->i_flags
));
594 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
595 qdsb_put(ip
->i_res
->rs_qa_qd
[x
]);
596 ip
->i_res
->rs_qa_qd
[x
] = NULL
;
598 ip
->i_res
->rs_qa_qd_num
= 0;
601 static int sort_qd(const void *a
, const void *b
)
603 const struct gfs2_quota_data
*qd_a
= *(const struct gfs2_quota_data
**)a
;
604 const struct gfs2_quota_data
*qd_b
= *(const struct gfs2_quota_data
**)b
;
606 if (qid_lt(qd_a
->qd_id
, qd_b
->qd_id
))
608 if (qid_lt(qd_b
->qd_id
, qd_a
->qd_id
))
613 static void do_qc(struct gfs2_quota_data
*qd
, s64 change
)
615 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
616 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
617 struct gfs2_quota_change
*qc
= qd
->qd_bh_qc
;
620 mutex_lock(&sdp
->sd_quota_mutex
);
621 gfs2_trans_add_meta(ip
->i_gl
, qd
->qd_bh
);
623 if (!test_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
626 if (qd
->qd_id
.type
== USRQUOTA
)
627 qc
->qc_flags
= cpu_to_be32(GFS2_QCF_USER
);
628 qc
->qc_id
= cpu_to_be32(from_kqid(&init_user_ns
, qd
->qd_id
));
631 x
= be64_to_cpu(qc
->qc_change
) + change
;
632 qc
->qc_change
= cpu_to_be64(x
);
636 spin_unlock(&qd_lock
);
639 gfs2_assert_warn(sdp
, test_bit(QDF_CHANGE
, &qd
->qd_flags
));
640 clear_bit(QDF_CHANGE
, &qd
->qd_flags
);
645 } else if (!test_and_set_bit(QDF_CHANGE
, &qd
->qd_flags
)) {
650 mutex_unlock(&sdp
->sd_quota_mutex
);
654 * gfs2_adjust_quota - adjust record of current block usage
655 * @ip: The quota inode
656 * @loc: Offset of the entry in the quota file
657 * @change: The amount of usage change to record
658 * @qd: The quota data
659 * @fdq: The updated limits to record
661 * This function was mostly borrowed from gfs2_block_truncate_page which was
662 * in turn mostly borrowed from ext3
664 * Returns: 0 or -ve on error
667 static int gfs2_adjust_quota(struct gfs2_inode
*ip
, loff_t loc
,
668 s64 change
, struct gfs2_quota_data
*qd
,
669 struct fs_disk_quota
*fdq
)
671 struct inode
*inode
= &ip
->i_inode
;
672 struct gfs2_sbd
*sdp
= GFS2_SB(inode
);
673 struct address_space
*mapping
= inode
->i_mapping
;
674 unsigned long index
= loc
>> PAGE_CACHE_SHIFT
;
675 unsigned offset
= loc
& (PAGE_CACHE_SIZE
- 1);
676 unsigned blocksize
, iblock
, pos
;
677 struct buffer_head
*bh
;
684 if (gfs2_is_stuffed(ip
)) {
685 err
= gfs2_unstuff_dinode(ip
, NULL
);
690 memset(&q
, 0, sizeof(struct gfs2_quota
));
691 err
= gfs2_internal_read(ip
, (char *)&q
, &loc
, sizeof(q
));
696 be64_add_cpu(&q
.qu_value
, change
);
697 qd
->qd_qb
.qb_value
= q
.qu_value
;
699 if (fdq
->d_fieldmask
& FS_DQ_BSOFT
) {
700 q
.qu_warn
= cpu_to_be64(fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
);
701 qd
->qd_qb
.qb_warn
= q
.qu_warn
;
703 if (fdq
->d_fieldmask
& FS_DQ_BHARD
) {
704 q
.qu_limit
= cpu_to_be64(fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
);
705 qd
->qd_qb
.qb_limit
= q
.qu_limit
;
707 if (fdq
->d_fieldmask
& FS_DQ_BCOUNT
) {
708 q
.qu_value
= cpu_to_be64(fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
);
709 qd
->qd_qb
.qb_value
= q
.qu_value
;
713 /* Write the quota into the quota file on disk */
715 nbytes
= sizeof(struct gfs2_quota
);
717 page
= find_or_create_page(mapping
, index
, GFP_NOFS
);
721 blocksize
= inode
->i_sb
->s_blocksize
;
722 iblock
= index
<< (PAGE_CACHE_SHIFT
- inode
->i_sb
->s_blocksize_bits
);
724 if (!page_has_buffers(page
))
725 create_empty_buffers(page
, blocksize
, 0);
727 bh
= page_buffers(page
);
729 while (offset
>= pos
) {
730 bh
= bh
->b_this_page
;
735 if (!buffer_mapped(bh
)) {
736 gfs2_block_map(inode
, iblock
, bh
, 1);
737 if (!buffer_mapped(bh
))
739 /* If it's a newly allocated disk block for quota, zero it */
741 zero_user(page
, pos
- blocksize
, bh
->b_size
);
744 if (PageUptodate(page
))
745 set_buffer_uptodate(bh
);
747 if (!buffer_uptodate(bh
)) {
748 ll_rw_block(READ
| REQ_META
, 1, &bh
);
750 if (!buffer_uptodate(bh
))
754 gfs2_trans_add_data(ip
->i_gl
, bh
);
756 kaddr
= kmap_atomic(page
);
757 if (offset
+ sizeof(struct gfs2_quota
) > PAGE_CACHE_SIZE
)
758 nbytes
= PAGE_CACHE_SIZE
- offset
;
759 memcpy(kaddr
+ offset
, ptr
, nbytes
);
760 flush_dcache_page(page
);
761 kunmap_atomic(kaddr
);
763 page_cache_release(page
);
765 /* If quota straddles page boundary, we need to update the rest of the
766 * quota at the beginning of the next page */
767 if ((offset
+ sizeof(struct gfs2_quota
)) > PAGE_CACHE_SIZE
) {
769 nbytes
= sizeof(struct gfs2_quota
) - nbytes
;
775 size
= loc
+ sizeof(struct gfs2_quota
);
776 if (size
> inode
->i_size
)
777 i_size_write(inode
, size
);
778 inode
->i_mtime
= inode
->i_atime
= CURRENT_TIME
;
779 mark_inode_dirty(inode
);
784 page_cache_release(page
);
788 static int do_sync(unsigned int num_qd
, struct gfs2_quota_data
**qda
)
790 struct gfs2_sbd
*sdp
= (*qda
)->qd_gl
->gl_sbd
;
791 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
792 struct gfs2_alloc_parms ap
= { .aflags
= 0, };
793 unsigned int data_blocks
, ind_blocks
;
794 struct gfs2_holder
*ghs
, i_gh
;
796 struct gfs2_quota_data
*qd
;
799 unsigned int nalloc
= 0, blocks
;
802 error
= gfs2_rs_alloc(ip
);
806 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
807 &data_blocks
, &ind_blocks
);
809 ghs
= kcalloc(num_qd
, sizeof(struct gfs2_holder
), GFP_NOFS
);
813 sort(qda
, num_qd
, sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
814 mutex_lock(&ip
->i_inode
.i_mutex
);
815 for (qx
= 0; qx
< num_qd
; qx
++) {
816 error
= gfs2_glock_nq_init(qda
[qx
]->qd_gl
, LM_ST_EXCLUSIVE
,
817 GL_NOCACHE
, &ghs
[qx
]);
822 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
826 for (x
= 0; x
< num_qd
; x
++) {
827 offset
= qd2offset(qda
[x
]);
828 if (gfs2_write_alloc_required(ip
, offset
,
829 sizeof(struct gfs2_quota
)))
834 * 1 blk for unstuffing inode if stuffed. We add this extra
835 * block to the reservation unconditionally. If the inode
836 * doesn't need unstuffing, the block will be released to the
837 * rgrp since it won't be allocated during the transaction
839 /* +3 in the end for unstuffing block, inode size update block
840 * and another block in case quota straddles page boundary and
841 * two blocks need to be updated instead of 1 */
842 blocks
= num_qd
* data_blocks
+ RES_DINODE
+ num_qd
+ 3;
844 reserved
= 1 + (nalloc
* (data_blocks
+ ind_blocks
));
845 ap
.target
= reserved
;
846 error
= gfs2_inplace_reserve(ip
, &ap
);
851 blocks
+= gfs2_rg_blocks(ip
, reserved
) + nalloc
* ind_blocks
+ RES_STATFS
;
853 error
= gfs2_trans_begin(sdp
, blocks
, 0);
857 for (x
= 0; x
< num_qd
; x
++) {
859 offset
= qd2offset(qd
);
860 error
= gfs2_adjust_quota(ip
, offset
, qd
->qd_change_sync
, qd
, NULL
);
864 do_qc(qd
, -qd
->qd_change_sync
);
865 set_bit(QDF_REFRESH
, &qd
->qd_flags
);
873 gfs2_inplace_release(ip
);
875 gfs2_glock_dq_uninit(&i_gh
);
878 gfs2_glock_dq_uninit(&ghs
[qx
]);
879 mutex_unlock(&ip
->i_inode
.i_mutex
);
881 gfs2_log_flush(ip
->i_gl
->gl_sbd
, ip
->i_gl
);
885 static int update_qd(struct gfs2_sbd
*sdp
, struct gfs2_quota_data
*qd
)
887 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
889 struct gfs2_quota_lvb
*qlvb
;
893 memset(&q
, 0, sizeof(struct gfs2_quota
));
895 error
= gfs2_internal_read(ip
, (char *)&q
, &pos
, sizeof(q
));
899 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
900 qlvb
->qb_magic
= cpu_to_be32(GFS2_MAGIC
);
902 qlvb
->qb_limit
= q
.qu_limit
;
903 qlvb
->qb_warn
= q
.qu_warn
;
904 qlvb
->qb_value
= q
.qu_value
;
910 static int do_glock(struct gfs2_quota_data
*qd
, int force_refresh
,
911 struct gfs2_holder
*q_gh
)
913 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
914 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
915 struct gfs2_holder i_gh
;
919 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_SHARED
, 0, q_gh
);
923 qd
->qd_qb
= *(struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
925 if (force_refresh
|| qd
->qd_qb
.qb_magic
!= cpu_to_be32(GFS2_MAGIC
)) {
926 gfs2_glock_dq_uninit(q_gh
);
927 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
,
932 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_SHARED
, 0, &i_gh
);
936 error
= update_qd(sdp
, qd
);
940 gfs2_glock_dq_uninit(&i_gh
);
941 gfs2_glock_dq_uninit(q_gh
);
949 gfs2_glock_dq_uninit(&i_gh
);
951 gfs2_glock_dq_uninit(q_gh
);
955 int gfs2_quota_lock(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
957 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
958 struct gfs2_quota_data
*qd
;
962 error
= gfs2_quota_hold(ip
, uid
, gid
);
966 if (capable(CAP_SYS_RESOURCE
) ||
967 sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
970 sort(ip
->i_res
->rs_qa_qd
, ip
->i_res
->rs_qa_qd_num
,
971 sizeof(struct gfs2_quota_data
*), sort_qd
, NULL
);
973 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
974 int force
= NO_FORCE
;
975 qd
= ip
->i_res
->rs_qa_qd
[x
];
976 if (test_and_clear_bit(QDF_REFRESH
, &qd
->qd_flags
))
978 error
= do_glock(qd
, force
, &ip
->i_res
->rs_qa_qd_ghs
[x
]);
984 set_bit(GIF_QD_LOCKED
, &ip
->i_flags
);
987 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
988 gfs2_quota_unhold(ip
);
994 static int need_sync(struct gfs2_quota_data
*qd
)
996 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
997 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
999 unsigned int num
, den
;
1002 if (!qd
->qd_qb
.qb_limit
)
1005 spin_lock(&qd_lock
);
1006 value
= qd
->qd_change
;
1007 spin_unlock(&qd_lock
);
1009 spin_lock(>
->gt_spin
);
1010 num
= gt
->gt_quota_scale_num
;
1011 den
= gt
->gt_quota_scale_den
;
1012 spin_unlock(>
->gt_spin
);
1016 else if ((s64
)be64_to_cpu(qd
->qd_qb
.qb_value
) >=
1017 (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1020 value
*= gfs2_jindex_size(sdp
) * num
;
1021 value
= div_s64(value
, den
);
1022 value
+= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1023 if (value
< (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
))
1030 void gfs2_quota_unlock(struct gfs2_inode
*ip
)
1032 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1033 struct gfs2_quota_data
*qda
[4];
1034 unsigned int count
= 0;
1038 if (!test_and_clear_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1041 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1042 struct gfs2_quota_data
*qd
;
1045 qd
= ip
->i_res
->rs_qa_qd
[x
];
1046 sync
= need_sync(qd
);
1048 gfs2_glock_dq_uninit(&ip
->i_res
->rs_qa_qd_ghs
[x
]);
1052 spin_lock(&qd_lock
);
1053 found
= qd_check_sync(sdp
, qd
, NULL
);
1054 spin_unlock(&qd_lock
);
1059 gfs2_assert_warn(sdp
, qd
->qd_change_sync
);
1061 clear_bit(QDF_LOCKED
, &qd
->qd_flags
);
1071 do_sync(count
, qda
);
1072 for (x
= 0; x
< count
; x
++)
1077 gfs2_quota_unhold(ip
);
1080 #define MAX_LINE 256
1082 static int print_message(struct gfs2_quota_data
*qd
, char *type
)
1084 struct gfs2_sbd
*sdp
= qd
->qd_gl
->gl_sbd
;
1086 pr_info("fsid=%s: quota %s for %s %u\n",
1087 sdp
->sd_fsname
, type
,
1088 (qd
->qd_id
.type
== USRQUOTA
) ? "user" : "group",
1089 from_kqid(&init_user_ns
, qd
->qd_id
));
1094 int gfs2_quota_check(struct gfs2_inode
*ip
, kuid_t uid
, kgid_t gid
)
1096 struct gfs2_sbd
*sdp
= GFS2_SB(&ip
->i_inode
);
1097 struct gfs2_quota_data
*qd
;
1102 if (!test_bit(GIF_QD_LOCKED
, &ip
->i_flags
))
1105 if (sdp
->sd_args
.ar_quota
!= GFS2_QUOTA_ON
)
1108 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1109 qd
= ip
->i_res
->rs_qa_qd
[x
];
1111 if (!(qid_eq(qd
->qd_id
, make_kqid_uid(uid
)) ||
1112 qid_eq(qd
->qd_id
, make_kqid_gid(gid
))))
1115 value
= (s64
)be64_to_cpu(qd
->qd_qb
.qb_value
);
1116 spin_lock(&qd_lock
);
1117 value
+= qd
->qd_change
;
1118 spin_unlock(&qd_lock
);
1120 if (be64_to_cpu(qd
->qd_qb
.qb_limit
) && (s64
)be64_to_cpu(qd
->qd_qb
.qb_limit
) < value
) {
1121 print_message(qd
, "exceeded");
1122 quota_send_warning(qd
->qd_id
,
1123 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BHARDWARN
);
1127 } else if (be64_to_cpu(qd
->qd_qb
.qb_warn
) &&
1128 (s64
)be64_to_cpu(qd
->qd_qb
.qb_warn
) < value
&&
1129 time_after_eq(jiffies
, qd
->qd_last_warn
+
1131 gt_quota_warn_period
) * HZ
)) {
1132 quota_send_warning(qd
->qd_id
,
1133 sdp
->sd_vfs
->s_dev
, QUOTA_NL_BSOFTWARN
);
1134 error
= print_message(qd
, "warning");
1135 qd
->qd_last_warn
= jiffies
;
1142 void gfs2_quota_change(struct gfs2_inode
*ip
, s64 change
,
1143 kuid_t uid
, kgid_t gid
)
1145 struct gfs2_quota_data
*qd
;
1148 if (gfs2_assert_warn(GFS2_SB(&ip
->i_inode
), change
))
1150 if (ip
->i_diskflags
& GFS2_DIF_SYSTEM
)
1153 for (x
= 0; x
< ip
->i_res
->rs_qa_qd_num
; x
++) {
1154 qd
= ip
->i_res
->rs_qa_qd
[x
];
1156 if (qid_eq(qd
->qd_id
, make_kqid_uid(uid
)) ||
1157 qid_eq(qd
->qd_id
, make_kqid_gid(gid
))) {
1163 int gfs2_quota_sync(struct super_block
*sb
, int type
)
1165 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1166 struct gfs2_quota_data
**qda
;
1167 unsigned int max_qd
= PAGE_SIZE
/sizeof(struct gfs2_holder
);
1168 unsigned int num_qd
;
1172 qda
= kcalloc(max_qd
, sizeof(struct gfs2_quota_data
*), GFP_KERNEL
);
1176 mutex_lock(&sdp
->sd_quota_sync_mutex
);
1177 sdp
->sd_quota_sync_gen
++;
1183 error
= qd_fish(sdp
, qda
+ num_qd
);
1184 if (error
|| !qda
[num_qd
])
1186 if (++num_qd
== max_qd
)
1192 error
= do_sync(num_qd
, qda
);
1194 for (x
= 0; x
< num_qd
; x
++)
1195 qda
[x
]->qd_sync_gen
=
1196 sdp
->sd_quota_sync_gen
;
1198 for (x
= 0; x
< num_qd
; x
++)
1201 } while (!error
&& num_qd
== max_qd
);
1203 mutex_unlock(&sdp
->sd_quota_sync_mutex
);
1209 int gfs2_quota_refresh(struct gfs2_sbd
*sdp
, struct kqid qid
)
1211 struct gfs2_quota_data
*qd
;
1212 struct gfs2_holder q_gh
;
1215 error
= qd_get(sdp
, qid
, &qd
);
1219 error
= do_glock(qd
, FORCE
, &q_gh
);
1221 gfs2_glock_dq_uninit(&q_gh
);
1227 int gfs2_quota_init(struct gfs2_sbd
*sdp
)
1229 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_qc_inode
);
1230 u64 size
= i_size_read(sdp
->sd_qc_inode
);
1231 unsigned int blocks
= size
>> sdp
->sd_sb
.sb_bsize_shift
;
1232 unsigned int x
, slot
= 0;
1233 unsigned int found
= 0;
1235 unsigned int bm_size
;
1240 if (gfs2_check_internal_file_size(sdp
->sd_qc_inode
, 1, 64 << 20))
1243 sdp
->sd_quota_slots
= blocks
* sdp
->sd_qc_per_block
;
1244 bm_size
= DIV_ROUND_UP(sdp
->sd_quota_slots
, 8 * sizeof(unsigned long));
1245 bm_size
*= sizeof(unsigned long);
1247 sdp
->sd_quota_bitmap
= kzalloc(bm_size
, GFP_NOFS
| __GFP_NOWARN
);
1248 if (sdp
->sd_quota_bitmap
== NULL
)
1249 sdp
->sd_quota_bitmap
= __vmalloc(bm_size
, GFP_NOFS
|
1250 __GFP_ZERO
, PAGE_KERNEL
);
1251 if (!sdp
->sd_quota_bitmap
)
1254 for (x
= 0; x
< blocks
; x
++) {
1255 struct buffer_head
*bh
;
1256 const struct gfs2_quota_change
*qc
;
1261 error
= gfs2_extent_map(&ip
->i_inode
, x
, &new, &dblock
, &extlen
);
1266 bh
= gfs2_meta_ra(ip
->i_gl
, dblock
, extlen
);
1269 if (gfs2_metatype_check(sdp
, bh
, GFS2_METATYPE_QC
)) {
1274 qc
= (const struct gfs2_quota_change
*)(bh
->b_data
+ sizeof(struct gfs2_meta_header
));
1275 for (y
= 0; y
< sdp
->sd_qc_per_block
&& slot
< sdp
->sd_quota_slots
;
1277 struct gfs2_quota_data
*qd
;
1278 s64 qc_change
= be64_to_cpu(qc
->qc_change
);
1279 u32 qc_flags
= be32_to_cpu(qc
->qc_flags
);
1280 enum quota_type qtype
= (qc_flags
& GFS2_QCF_USER
) ?
1281 USRQUOTA
: GRPQUOTA
;
1282 struct kqid qc_id
= make_kqid(&init_user_ns
, qtype
,
1283 be32_to_cpu(qc
->qc_id
));
1288 hash
= gfs2_qd_hash(sdp
, qc_id
);
1289 qd
= qd_alloc(hash
, sdp
, qc_id
);
1295 set_bit(QDF_CHANGE
, &qd
->qd_flags
);
1296 qd
->qd_change
= qc_change
;
1298 qd
->qd_slot_count
= 1;
1300 spin_lock(&qd_lock
);
1301 BUG_ON(test_and_set_bit(slot
, sdp
->sd_quota_bitmap
));
1302 list_add(&qd
->qd_list
, &sdp
->sd_quota_list
);
1303 atomic_inc(&sdp
->sd_quota_count
);
1304 spin_unlock(&qd_lock
);
1306 spin_lock_bucket(hash
);
1307 hlist_bl_add_head_rcu(&qd
->qd_hlist
, &qd_hash_table
[hash
]);
1308 spin_unlock_bucket(hash
);
1319 fs_info(sdp
, "found %u quota changes\n", found
);
1324 gfs2_quota_cleanup(sdp
);
1328 void gfs2_quota_cleanup(struct gfs2_sbd
*sdp
)
1330 struct list_head
*head
= &sdp
->sd_quota_list
;
1331 struct gfs2_quota_data
*qd
;
1333 spin_lock(&qd_lock
);
1334 while (!list_empty(head
)) {
1335 qd
= list_entry(head
->prev
, struct gfs2_quota_data
, qd_list
);
1337 list_del(&qd
->qd_list
);
1339 /* Also remove if this qd exists in the reclaim list */
1340 list_lru_del(&gfs2_qd_lru
, &qd
->qd_lru
);
1341 atomic_dec(&sdp
->sd_quota_count
);
1342 spin_unlock(&qd_lock
);
1344 spin_lock_bucket(qd
->qd_hash
);
1345 hlist_bl_del_rcu(&qd
->qd_hlist
);
1346 spin_unlock_bucket(qd
->qd_hash
);
1348 gfs2_assert_warn(sdp
, !qd
->qd_change
);
1349 gfs2_assert_warn(sdp
, !qd
->qd_slot_count
);
1350 gfs2_assert_warn(sdp
, !qd
->qd_bh_count
);
1352 gfs2_glock_put(qd
->qd_gl
);
1353 call_rcu(&qd
->qd_rcu
, gfs2_qd_dealloc
);
1355 spin_lock(&qd_lock
);
1357 spin_unlock(&qd_lock
);
1359 gfs2_assert_warn(sdp
, !atomic_read(&sdp
->sd_quota_count
));
1361 if (sdp
->sd_quota_bitmap
) {
1362 if (is_vmalloc_addr(sdp
->sd_quota_bitmap
))
1363 vfree(sdp
->sd_quota_bitmap
);
1365 kfree(sdp
->sd_quota_bitmap
);
1366 sdp
->sd_quota_bitmap
= NULL
;
1370 static void quotad_error(struct gfs2_sbd
*sdp
, const char *msg
, int error
)
1372 if (error
== 0 || error
== -EROFS
)
1374 if (!test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
))
1375 fs_err(sdp
, "gfs2_quotad: %s error %d\n", msg
, error
);
1378 static void quotad_check_timeo(struct gfs2_sbd
*sdp
, const char *msg
,
1379 int (*fxn
)(struct super_block
*sb
, int type
),
1380 unsigned long t
, unsigned long *timeo
,
1381 unsigned int *new_timeo
)
1384 int error
= fxn(sdp
->sd_vfs
, 0);
1385 quotad_error(sdp
, msg
, error
);
1386 *timeo
= gfs2_tune_get_i(&sdp
->sd_tune
, new_timeo
) * HZ
;
1392 static void quotad_check_trunc_list(struct gfs2_sbd
*sdp
)
1394 struct gfs2_inode
*ip
;
1398 spin_lock(&sdp
->sd_trunc_lock
);
1399 if (!list_empty(&sdp
->sd_trunc_list
)) {
1400 ip
= list_entry(sdp
->sd_trunc_list
.next
,
1401 struct gfs2_inode
, i_trunc_list
);
1402 list_del_init(&ip
->i_trunc_list
);
1404 spin_unlock(&sdp
->sd_trunc_lock
);
1407 gfs2_glock_finish_truncate(ip
);
1411 void gfs2_wake_up_statfs(struct gfs2_sbd
*sdp
) {
1412 if (!sdp
->sd_statfs_force_sync
) {
1413 sdp
->sd_statfs_force_sync
= 1;
1414 wake_up(&sdp
->sd_quota_wait
);
1420 * gfs2_quotad - Write cached quota changes into the quota file
1421 * @sdp: Pointer to GFS2 superblock
1425 int gfs2_quotad(void *data
)
1427 struct gfs2_sbd
*sdp
= data
;
1428 struct gfs2_tune
*tune
= &sdp
->sd_tune
;
1429 unsigned long statfs_timeo
= 0;
1430 unsigned long quotad_timeo
= 0;
1431 unsigned long t
= 0;
1435 while (!kthread_should_stop()) {
1437 /* Update the master statfs file */
1438 if (sdp
->sd_statfs_force_sync
) {
1439 int error
= gfs2_statfs_sync(sdp
->sd_vfs
, 0);
1440 quotad_error(sdp
, "statfs", error
);
1441 statfs_timeo
= gfs2_tune_get(sdp
, gt_statfs_quantum
) * HZ
;
1444 quotad_check_timeo(sdp
, "statfs", gfs2_statfs_sync
, t
,
1446 &tune
->gt_statfs_quantum
);
1448 /* Update quota file */
1449 quotad_check_timeo(sdp
, "sync", gfs2_quota_sync
, t
,
1450 "ad_timeo
, &tune
->gt_quota_quantum
);
1452 /* Check for & recover partially truncated inodes */
1453 quotad_check_trunc_list(sdp
);
1457 t
= min(quotad_timeo
, statfs_timeo
);
1459 prepare_to_wait(&sdp
->sd_quota_wait
, &wait
, TASK_INTERRUPTIBLE
);
1460 spin_lock(&sdp
->sd_trunc_lock
);
1461 empty
= list_empty(&sdp
->sd_trunc_list
);
1462 spin_unlock(&sdp
->sd_trunc_lock
);
1463 if (empty
&& !sdp
->sd_statfs_force_sync
)
1464 t
-= schedule_timeout(t
);
1467 finish_wait(&sdp
->sd_quota_wait
, &wait
);
1473 static int gfs2_quota_get_xstate(struct super_block
*sb
,
1474 struct fs_quota_stat
*fqs
)
1476 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1478 memset(fqs
, 0, sizeof(struct fs_quota_stat
));
1479 fqs
->qs_version
= FS_QSTAT_VERSION
;
1481 switch (sdp
->sd_args
.ar_quota
) {
1483 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ENFD
| FS_QUOTA_GDQ_ENFD
);
1485 case GFS2_QUOTA_ACCOUNT
:
1486 fqs
->qs_flags
|= (FS_QUOTA_UDQ_ACCT
| FS_QUOTA_GDQ_ACCT
);
1488 case GFS2_QUOTA_OFF
:
1492 if (sdp
->sd_quota_inode
) {
1493 fqs
->qs_uquota
.qfs_ino
= GFS2_I(sdp
->sd_quota_inode
)->i_no_addr
;
1494 fqs
->qs_uquota
.qfs_nblks
= sdp
->sd_quota_inode
->i_blocks
;
1496 fqs
->qs_uquota
.qfs_nextents
= 1; /* unsupported */
1497 fqs
->qs_gquota
= fqs
->qs_uquota
; /* its the same inode in both cases */
1498 fqs
->qs_incoredqs
= list_lru_count(&gfs2_qd_lru
);
1502 static int gfs2_get_dqblk(struct super_block
*sb
, struct kqid qid
,
1503 struct fs_disk_quota
*fdq
)
1505 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1506 struct gfs2_quota_lvb
*qlvb
;
1507 struct gfs2_quota_data
*qd
;
1508 struct gfs2_holder q_gh
;
1511 memset(fdq
, 0, sizeof(struct fs_disk_quota
));
1513 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1514 return -ESRCH
; /* Crazy XFS error code */
1516 if ((qid
.type
!= USRQUOTA
) &&
1517 (qid
.type
!= GRPQUOTA
))
1520 error
= qd_get(sdp
, qid
, &qd
);
1523 error
= do_glock(qd
, FORCE
, &q_gh
);
1527 qlvb
= (struct gfs2_quota_lvb
*)qd
->qd_gl
->gl_lksb
.sb_lvbptr
;
1528 fdq
->d_version
= FS_DQUOT_VERSION
;
1529 fdq
->d_flags
= (qid
.type
== USRQUOTA
) ? FS_USER_QUOTA
: FS_GROUP_QUOTA
;
1530 fdq
->d_id
= from_kqid_munged(current_user_ns(), qid
);
1531 fdq
->d_blk_hardlimit
= be64_to_cpu(qlvb
->qb_limit
) << sdp
->sd_fsb2bb_shift
;
1532 fdq
->d_blk_softlimit
= be64_to_cpu(qlvb
->qb_warn
) << sdp
->sd_fsb2bb_shift
;
1533 fdq
->d_bcount
= be64_to_cpu(qlvb
->qb_value
) << sdp
->sd_fsb2bb_shift
;
1535 gfs2_glock_dq_uninit(&q_gh
);
1541 /* GFS2 only supports a subset of the XFS fields */
1542 #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
1544 static int gfs2_set_dqblk(struct super_block
*sb
, struct kqid qid
,
1545 struct fs_disk_quota
*fdq
)
1547 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
1548 struct gfs2_inode
*ip
= GFS2_I(sdp
->sd_quota_inode
);
1549 struct gfs2_quota_data
*qd
;
1550 struct gfs2_holder q_gh
, i_gh
;
1551 unsigned int data_blocks
, ind_blocks
;
1552 unsigned int blocks
= 0;
1557 if (sdp
->sd_args
.ar_quota
== GFS2_QUOTA_OFF
)
1558 return -ESRCH
; /* Crazy XFS error code */
1560 if ((qid
.type
!= USRQUOTA
) &&
1561 (qid
.type
!= GRPQUOTA
))
1564 if (fdq
->d_fieldmask
& ~GFS2_FIELDMASK
)
1567 error
= qd_get(sdp
, qid
, &qd
);
1571 error
= gfs2_rs_alloc(ip
);
1575 mutex_lock(&ip
->i_inode
.i_mutex
);
1576 error
= gfs2_glock_nq_init(qd
->qd_gl
, LM_ST_EXCLUSIVE
, 0, &q_gh
);
1579 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, 0, &i_gh
);
1583 /* Check for existing entry, if none then alloc new blocks */
1584 error
= update_qd(sdp
, qd
);
1588 /* If nothing has changed, this is a no-op */
1589 if ((fdq
->d_fieldmask
& FS_DQ_BSOFT
) &&
1590 ((fdq
->d_blk_softlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_warn
)))
1591 fdq
->d_fieldmask
^= FS_DQ_BSOFT
;
1593 if ((fdq
->d_fieldmask
& FS_DQ_BHARD
) &&
1594 ((fdq
->d_blk_hardlimit
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_limit
)))
1595 fdq
->d_fieldmask
^= FS_DQ_BHARD
;
1597 if ((fdq
->d_fieldmask
& FS_DQ_BCOUNT
) &&
1598 ((fdq
->d_bcount
>> sdp
->sd_fsb2bb_shift
) == be64_to_cpu(qd
->qd_qb
.qb_value
)))
1599 fdq
->d_fieldmask
^= FS_DQ_BCOUNT
;
1601 if (fdq
->d_fieldmask
== 0)
1604 offset
= qd2offset(qd
);
1605 alloc_required
= gfs2_write_alloc_required(ip
, offset
, sizeof(struct gfs2_quota
));
1606 if (gfs2_is_stuffed(ip
))
1608 if (alloc_required
) {
1609 struct gfs2_alloc_parms ap
= { .aflags
= 0, };
1610 gfs2_write_calc_reserv(ip
, sizeof(struct gfs2_quota
),
1611 &data_blocks
, &ind_blocks
);
1612 blocks
= 1 + data_blocks
+ ind_blocks
;
1614 error
= gfs2_inplace_reserve(ip
, &ap
);
1617 blocks
+= gfs2_rg_blocks(ip
, blocks
);
1620 /* Some quotas span block boundaries and can update two blocks,
1621 adding an extra block to the transaction to handle such quotas */
1622 error
= gfs2_trans_begin(sdp
, blocks
+ RES_DINODE
+ 2, 0);
1627 error
= gfs2_adjust_quota(ip
, offset
, 0, qd
, fdq
);
1629 gfs2_trans_end(sdp
);
1632 gfs2_inplace_release(ip
);
1634 gfs2_glock_dq_uninit(&i_gh
);
1636 gfs2_glock_dq_uninit(&q_gh
);
1638 mutex_unlock(&ip
->i_inode
.i_mutex
);
1644 const struct quotactl_ops gfs2_quotactl_ops
= {
1645 .quota_sync
= gfs2_quota_sync
,
1646 .get_xstate
= gfs2_quota_get_xstate
,
1647 .get_dqblk
= gfs2_get_dqblk
,
1648 .set_dqblk
= gfs2_set_dqblk
,
1651 void __init
gfs2_quota_hash_init(void)
1655 for(i
= 0; i
< GFS2_QD_HASH_SIZE
; i
++)
1656 INIT_HLIST_BL_HEAD(&qd_hash_table
[i
]);