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]);