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,
149 struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
151 struct list_head *dispose = arg;
152 struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru);
154 if (!spin_trylock(&qd->qd_lockref.lock))
157 if (qd->qd_lockref.count == 0) {
158 lockref_mark_dead(&qd->qd_lockref);
159 list_lru_isolate_move(lru, &qd->qd_lru, dispose);
162 spin_unlock(&qd->qd_lockref.lock);
166 static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
167 struct shrink_control *sc)
172 if (!(sc->gfp_mask & __GFP_FS))
175 freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
176 gfs2_qd_isolate, &dispose);
178 gfs2_qd_dispose(&dispose);
183 static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
184 struct shrink_control *sc)
186 return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
189 struct shrinker gfs2_qd_shrinker = {
190 .count_objects = gfs2_qd_shrink_count,
191 .scan_objects = gfs2_qd_shrink_scan,
192 .seeks = DEFAULT_SEEKS,
193 .flags = SHRINKER_NUMA_AWARE,
197 static u64 qd2index(struct gfs2_quota_data *qd)
199 struct kqid qid = qd->qd_id;
200 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
201 ((qid.type == USRQUOTA) ? 0 : 1);
204 static u64 qd2offset(struct gfs2_quota_data *qd)
208 offset = qd2index(qd);
209 offset *= sizeof(struct gfs2_quota);
214 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
216 struct gfs2_quota_data *qd;
219 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
224 qd->qd_lockref.count = 1;
225 spin_lock_init(&qd->qd_lockref.lock);
228 INIT_LIST_HEAD(&qd->qd_lru);
231 error = gfs2_glock_get(sdp, qd2index(qd),
232 &gfs2_quota_glops, CREATE, &qd->qd_gl);
239 kmem_cache_free(gfs2_quotad_cachep, qd);
243 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
244 const struct gfs2_sbd *sdp,
247 struct gfs2_quota_data *qd;
248 struct hlist_bl_node *h;
250 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
251 if (!qid_eq(qd->qd_id, qid))
253 if (qd->qd_sbd != sdp)
255 if (lockref_get_not_dead(&qd->qd_lockref)) {
256 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
265 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
266 struct gfs2_quota_data **qdp)
268 struct gfs2_quota_data *qd, *new_qd;
269 unsigned int hash = gfs2_qd_hash(sdp, qid);
272 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
278 new_qd = qd_alloc(hash, sdp, qid);
283 spin_lock_bucket(hash);
284 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
287 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
288 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
289 atomic_inc(&sdp->sd_quota_count);
291 spin_unlock_bucket(hash);
292 spin_unlock(&qd_lock);
295 gfs2_glock_put(new_qd->qd_gl);
296 kmem_cache_free(gfs2_quotad_cachep, new_qd);
303 static void qd_hold(struct gfs2_quota_data *qd)
305 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
306 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
307 lockref_get(&qd->qd_lockref);
310 static void qd_put(struct gfs2_quota_data *qd)
312 if (lockref_put_or_lock(&qd->qd_lockref))
315 qd->qd_lockref.count = 0;
316 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
317 spin_unlock(&qd->qd_lockref.lock);
321 static int slot_get(struct gfs2_quota_data *qd)
323 struct gfs2_sbd *sdp = qd->qd_sbd;
327 spin_lock(&sdp->sd_bitmap_lock);
328 if (qd->qd_slot_count != 0)
332 bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
333 if (bit < sdp->sd_quota_slots) {
334 set_bit(bit, sdp->sd_quota_bitmap);
340 spin_unlock(&sdp->sd_bitmap_lock);
345 static void slot_hold(struct gfs2_quota_data *qd)
347 struct gfs2_sbd *sdp = qd->qd_sbd;
349 spin_lock(&sdp->sd_bitmap_lock);
350 gfs2_assert(sdp, qd->qd_slot_count);
352 spin_unlock(&sdp->sd_bitmap_lock);
355 static void slot_put(struct gfs2_quota_data *qd)
357 struct gfs2_sbd *sdp = qd->qd_sbd;
359 spin_lock(&sdp->sd_bitmap_lock);
360 gfs2_assert(sdp, qd->qd_slot_count);
361 if (!--qd->qd_slot_count) {
362 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
365 spin_unlock(&sdp->sd_bitmap_lock);
368 static int bh_get(struct gfs2_quota_data *qd)
370 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
371 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
372 unsigned int block, offset;
373 struct buffer_head *bh;
375 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
377 mutex_lock(&sdp->sd_quota_mutex);
379 if (qd->qd_bh_count++) {
380 mutex_unlock(&sdp->sd_quota_mutex);
384 block = qd->qd_slot / sdp->sd_qc_per_block;
385 offset = qd->qd_slot % sdp->sd_qc_per_block;
387 bh_map.b_size = 1 << ip->i_inode.i_blkbits;
388 error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
391 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
395 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
399 qd->qd_bh_qc = (struct gfs2_quota_change *)
400 (bh->b_data + sizeof(struct gfs2_meta_header) +
401 offset * sizeof(struct gfs2_quota_change));
403 mutex_unlock(&sdp->sd_quota_mutex);
411 mutex_unlock(&sdp->sd_quota_mutex);
415 static void bh_put(struct gfs2_quota_data *qd)
417 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
419 mutex_lock(&sdp->sd_quota_mutex);
420 gfs2_assert(sdp, qd->qd_bh_count);
421 if (!--qd->qd_bh_count) {
426 mutex_unlock(&sdp->sd_quota_mutex);
429 static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
432 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
433 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
434 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
437 if (!lockref_get_not_dead(&qd->qd_lockref))
440 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
441 set_bit(QDF_LOCKED, &qd->qd_flags);
442 qd->qd_change_sync = qd->qd_change;
447 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
449 struct gfs2_quota_data *qd = NULL;
455 if (sdp->sd_vfs->s_flags & MS_RDONLY)
460 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
461 found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen);
469 spin_unlock(&qd_lock);
472 gfs2_assert_warn(sdp, qd->qd_change_sync);
475 clear_bit(QDF_LOCKED, &qd->qd_flags);
487 static void qd_unlock(struct gfs2_quota_data *qd)
489 gfs2_assert_warn(qd->qd_gl->gl_sbd,
490 test_bit(QDF_LOCKED, &qd->qd_flags));
491 clear_bit(QDF_LOCKED, &qd->qd_flags);
497 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
498 struct gfs2_quota_data **qdp)
502 error = qd_get(sdp, qid, qdp);
506 error = slot_get(*qdp);
510 error = bh_get(*qdp);
523 static void qdsb_put(struct gfs2_quota_data *qd)
530 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
532 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
533 struct gfs2_quota_data **qd;
536 if (ip->i_res == NULL) {
537 error = gfs2_rs_alloc(ip);
542 qd = ip->i_res->rs_qa_qd;
544 if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
545 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
548 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
551 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
554 ip->i_res->rs_qa_qd_num++;
557 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
560 ip->i_res->rs_qa_qd_num++;
563 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
564 !uid_eq(uid, ip->i_inode.i_uid)) {
565 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
568 ip->i_res->rs_qa_qd_num++;
572 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
573 !gid_eq(gid, ip->i_inode.i_gid)) {
574 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
577 ip->i_res->rs_qa_qd_num++;
583 gfs2_quota_unhold(ip);
587 void gfs2_quota_unhold(struct gfs2_inode *ip)
589 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
592 if (ip->i_res == NULL)
594 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
596 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
597 qdsb_put(ip->i_res->rs_qa_qd[x]);
598 ip->i_res->rs_qa_qd[x] = NULL;
600 ip->i_res->rs_qa_qd_num = 0;
603 static int sort_qd(const void *a, const void *b)
605 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
606 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
608 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
610 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
615 static void do_qc(struct gfs2_quota_data *qd, s64 change)
617 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
618 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
619 struct gfs2_quota_change *qc = qd->qd_bh_qc;
622 mutex_lock(&sdp->sd_quota_mutex);
623 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
625 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
628 if (qd->qd_id.type == USRQUOTA)
629 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
630 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
633 x = be64_to_cpu(qc->qc_change) + change;
634 qc->qc_change = cpu_to_be64(x);
638 spin_unlock(&qd_lock);
641 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
642 clear_bit(QDF_CHANGE, &qd->qd_flags);
647 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
652 mutex_unlock(&sdp->sd_quota_mutex);
656 * gfs2_adjust_quota - adjust record of current block usage
657 * @ip: The quota inode
658 * @loc: Offset of the entry in the quota file
659 * @change: The amount of usage change to record
660 * @qd: The quota data
661 * @fdq: The updated limits to record
663 * This function was mostly borrowed from gfs2_block_truncate_page which was
664 * in turn mostly borrowed from ext3
666 * Returns: 0 or -ve on error
669 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
670 s64 change, struct gfs2_quota_data *qd,
671 struct qc_dqblk *fdq)
673 struct inode *inode = &ip->i_inode;
674 struct gfs2_sbd *sdp = GFS2_SB(inode);
675 struct address_space *mapping = inode->i_mapping;
676 unsigned long index = loc >> PAGE_CACHE_SHIFT;
677 unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
678 unsigned blocksize, iblock, pos;
679 struct buffer_head *bh;
686 if (gfs2_is_stuffed(ip)) {
687 err = gfs2_unstuff_dinode(ip, NULL);
692 memset(&q, 0, sizeof(struct gfs2_quota));
693 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
698 be64_add_cpu(&q.qu_value, change);
699 qd->qd_qb.qb_value = q.qu_value;
701 if (fdq->d_fieldmask & QC_SPC_SOFT) {
702 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
703 qd->qd_qb.qb_warn = q.qu_warn;
705 if (fdq->d_fieldmask & QC_SPC_HARD) {
706 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
707 qd->qd_qb.qb_limit = q.qu_limit;
709 if (fdq->d_fieldmask & QC_SPACE) {
710 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
711 qd->qd_qb.qb_value = q.qu_value;
715 /* Write the quota into the quota file on disk */
717 nbytes = sizeof(struct gfs2_quota);
719 page = find_or_create_page(mapping, index, GFP_NOFS);
723 blocksize = inode->i_sb->s_blocksize;
724 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
726 if (!page_has_buffers(page))
727 create_empty_buffers(page, blocksize, 0);
729 bh = page_buffers(page);
731 while (offset >= pos) {
732 bh = bh->b_this_page;
737 if (!buffer_mapped(bh)) {
738 gfs2_block_map(inode, iblock, bh, 1);
739 if (!buffer_mapped(bh))
741 /* If it's a newly allocated disk block for quota, zero it */
743 zero_user(page, pos - blocksize, bh->b_size);
746 if (PageUptodate(page))
747 set_buffer_uptodate(bh);
749 if (!buffer_uptodate(bh)) {
750 ll_rw_block(READ | REQ_META, 1, &bh);
752 if (!buffer_uptodate(bh))
756 gfs2_trans_add_data(ip->i_gl, bh);
758 kaddr = kmap_atomic(page);
759 if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
760 nbytes = PAGE_CACHE_SIZE - offset;
761 memcpy(kaddr + offset, ptr, nbytes);
762 flush_dcache_page(page);
763 kunmap_atomic(kaddr);
765 page_cache_release(page);
767 /* If quota straddles page boundary, we need to update the rest of the
768 * quota at the beginning of the next page */
769 if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
771 nbytes = sizeof(struct gfs2_quota) - nbytes;
777 size = loc + sizeof(struct gfs2_quota);
778 if (size > inode->i_size)
779 i_size_write(inode, size);
780 inode->i_mtime = inode->i_atime = CURRENT_TIME;
781 mark_inode_dirty(inode);
782 set_bit(QDF_REFRESH, &qd->qd_flags);
787 page_cache_release(page);
791 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
793 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
794 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
795 struct gfs2_alloc_parms ap = { .aflags = 0, };
796 unsigned int data_blocks, ind_blocks;
797 struct gfs2_holder *ghs, i_gh;
799 struct gfs2_quota_data *qd;
802 unsigned int nalloc = 0, blocks;
805 error = gfs2_rs_alloc(ip);
809 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
810 &data_blocks, &ind_blocks);
812 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
816 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
817 mutex_lock(&ip->i_inode.i_mutex);
818 for (qx = 0; qx < num_qd; qx++) {
819 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
820 GL_NOCACHE, &ghs[qx]);
825 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
829 for (x = 0; x < num_qd; x++) {
830 offset = qd2offset(qda[x]);
831 if (gfs2_write_alloc_required(ip, offset,
832 sizeof(struct gfs2_quota)))
837 * 1 blk for unstuffing inode if stuffed. We add this extra
838 * block to the reservation unconditionally. If the inode
839 * doesn't need unstuffing, the block will be released to the
840 * rgrp since it won't be allocated during the transaction
842 /* +3 in the end for unstuffing block, inode size update block
843 * and another block in case quota straddles page boundary and
844 * two blocks need to be updated instead of 1 */
845 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
847 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
848 ap.target = reserved;
849 error = gfs2_inplace_reserve(ip, &ap);
854 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
856 error = gfs2_trans_begin(sdp, blocks, 0);
860 for (x = 0; x < num_qd; x++) {
862 offset = qd2offset(qd);
863 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
867 do_qc(qd, -qd->qd_change_sync);
868 set_bit(QDF_REFRESH, &qd->qd_flags);
876 gfs2_inplace_release(ip);
878 gfs2_glock_dq_uninit(&i_gh);
881 gfs2_glock_dq_uninit(&ghs[qx]);
882 mutex_unlock(&ip->i_inode.i_mutex);
884 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl, NORMAL_FLUSH);
888 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
890 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
892 struct gfs2_quota_lvb *qlvb;
896 memset(&q, 0, sizeof(struct gfs2_quota));
898 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
902 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
903 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
905 qlvb->qb_limit = q.qu_limit;
906 qlvb->qb_warn = q.qu_warn;
907 qlvb->qb_value = q.qu_value;
913 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
914 struct gfs2_holder *q_gh)
916 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
917 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
918 struct gfs2_holder i_gh;
922 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
926 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
927 force_refresh = FORCE;
929 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
931 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
932 gfs2_glock_dq_uninit(q_gh);
933 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
938 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
942 error = update_qd(sdp, qd);
946 gfs2_glock_dq_uninit(&i_gh);
947 gfs2_glock_dq_uninit(q_gh);
955 gfs2_glock_dq_uninit(&i_gh);
957 gfs2_glock_dq_uninit(q_gh);
961 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
963 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
964 struct gfs2_quota_data *qd;
968 error = gfs2_quota_hold(ip, uid, gid);
972 if (capable(CAP_SYS_RESOURCE) ||
973 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
976 sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
977 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
979 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
980 qd = ip->i_res->rs_qa_qd[x];
981 error = do_glock(qd, NO_FORCE, &ip->i_res->rs_qa_qd_ghs[x]);
987 set_bit(GIF_QD_LOCKED, &ip->i_flags);
990 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
991 gfs2_quota_unhold(ip);
997 static int need_sync(struct gfs2_quota_data *qd)
999 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
1000 struct gfs2_tune *gt = &sdp->sd_tune;
1002 unsigned int num, den;
1005 if (!qd->qd_qb.qb_limit)
1008 spin_lock(&qd_lock);
1009 value = qd->qd_change;
1010 spin_unlock(&qd_lock);
1012 spin_lock(>->gt_spin);
1013 num = gt->gt_quota_scale_num;
1014 den = gt->gt_quota_scale_den;
1015 spin_unlock(>->gt_spin);
1019 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1020 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1023 value *= gfs2_jindex_size(sdp) * num;
1024 value = div_s64(value, den);
1025 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
1026 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1033 void gfs2_quota_unlock(struct gfs2_inode *ip)
1035 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1036 struct gfs2_quota_data *qda[4];
1037 unsigned int count = 0;
1041 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1044 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1045 struct gfs2_quota_data *qd;
1048 qd = ip->i_res->rs_qa_qd[x];
1049 sync = need_sync(qd);
1051 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
1055 spin_lock(&qd_lock);
1056 found = qd_check_sync(sdp, qd, NULL);
1057 spin_unlock(&qd_lock);
1062 gfs2_assert_warn(sdp, qd->qd_change_sync);
1064 clear_bit(QDF_LOCKED, &qd->qd_flags);
1074 do_sync(count, qda);
1075 for (x = 0; x < count; x++)
1080 gfs2_quota_unhold(ip);
1083 #define MAX_LINE 256
1085 static int print_message(struct gfs2_quota_data *qd, char *type)
1087 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
1089 fs_info(sdp, "quota %s for %s %u\n",
1091 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1092 from_kqid(&init_user_ns, qd->qd_id));
1098 * gfs2_quota_check - check if allocating new blocks will exceed quota
1099 * @ip: The inode for which this check is being performed
1100 * @uid: The uid to check against
1101 * @gid: The gid to check against
1102 * @ap: The allocation parameters. ap->target contains the requested
1103 * blocks. ap->min_target, if set, contains the minimum blks
1106 * Returns: 0 on success.
1107 * min_req = ap->min_target ? ap->min_target : ap->target;
1108 * quota must allow atleast min_req blks for success and
1109 * ap->allowed is set to the number of blocks allowed
1111 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1112 * of blocks available.
1114 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1115 struct gfs2_alloc_parms *ap)
1117 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1118 struct gfs2_quota_data *qd;
1119 s64 value, warn, limit;
1123 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1124 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1127 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1130 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1131 qd = ip->i_res->rs_qa_qd[x];
1133 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1134 qid_eq(qd->qd_id, make_kqid_gid(gid))))
1137 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1138 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1139 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1140 spin_lock(&qd_lock);
1141 value += qd->qd_change;
1142 spin_unlock(&qd_lock);
1144 if (limit > 0 && (limit - value) < ap->allowed)
1145 ap->allowed = limit - value;
1146 /* If we can't meet the target */
1147 if (limit && limit < (value + (s64)ap->target)) {
1148 /* If no min_target specified or we don't meet
1149 * min_target, return -EDQUOT */
1150 if (!ap->min_target || ap->min_target > ap->allowed) {
1151 print_message(qd, "exceeded");
1152 quota_send_warning(qd->qd_id,
1154 QUOTA_NL_BHARDWARN);
1158 } else if (warn && warn < value &&
1159 time_after_eq(jiffies, qd->qd_last_warn +
1160 gfs2_tune_get(sdp, gt_quota_warn_period)
1162 quota_send_warning(qd->qd_id,
1163 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1164 error = print_message(qd, "warning");
1165 qd->qd_last_warn = jiffies;
1171 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1172 kuid_t uid, kgid_t gid)
1174 struct gfs2_quota_data *qd;
1177 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
1179 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1182 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1183 qd = ip->i_res->rs_qa_qd[x];
1185 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1186 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1192 int gfs2_quota_sync(struct super_block *sb, int type)
1194 struct gfs2_sbd *sdp = sb->s_fs_info;
1195 struct gfs2_quota_data **qda;
1196 unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder);
1197 unsigned int num_qd;
1201 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1205 mutex_lock(&sdp->sd_quota_sync_mutex);
1206 sdp->sd_quota_sync_gen++;
1212 error = qd_fish(sdp, qda + num_qd);
1213 if (error || !qda[num_qd])
1215 if (++num_qd == max_qd)
1221 error = do_sync(num_qd, qda);
1223 for (x = 0; x < num_qd; x++)
1224 qda[x]->qd_sync_gen =
1225 sdp->sd_quota_sync_gen;
1227 for (x = 0; x < num_qd; x++)
1230 } while (!error && num_qd == max_qd);
1232 mutex_unlock(&sdp->sd_quota_sync_mutex);
1238 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1240 struct gfs2_quota_data *qd;
1241 struct gfs2_holder q_gh;
1244 error = qd_get(sdp, qid, &qd);
1248 error = do_glock(qd, FORCE, &q_gh);
1250 gfs2_glock_dq_uninit(&q_gh);
1256 int gfs2_quota_init(struct gfs2_sbd *sdp)
1258 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1259 u64 size = i_size_read(sdp->sd_qc_inode);
1260 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1261 unsigned int x, slot = 0;
1262 unsigned int found = 0;
1264 unsigned int bm_size;
1269 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1272 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1273 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1274 bm_size *= sizeof(unsigned long);
1276 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1277 if (sdp->sd_quota_bitmap == NULL)
1278 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1279 __GFP_ZERO, PAGE_KERNEL);
1280 if (!sdp->sd_quota_bitmap)
1283 for (x = 0; x < blocks; x++) {
1284 struct buffer_head *bh;
1285 const struct gfs2_quota_change *qc;
1290 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
1295 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1298 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1303 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1304 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1306 struct gfs2_quota_data *qd;
1307 s64 qc_change = be64_to_cpu(qc->qc_change);
1308 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1309 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1310 USRQUOTA : GRPQUOTA;
1311 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1312 be32_to_cpu(qc->qc_id));
1317 hash = gfs2_qd_hash(sdp, qc_id);
1318 qd = qd_alloc(hash, sdp, qc_id);
1324 set_bit(QDF_CHANGE, &qd->qd_flags);
1325 qd->qd_change = qc_change;
1327 qd->qd_slot_count = 1;
1329 spin_lock(&qd_lock);
1330 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1331 list_add(&qd->qd_list, &sdp->sd_quota_list);
1332 atomic_inc(&sdp->sd_quota_count);
1333 spin_unlock(&qd_lock);
1335 spin_lock_bucket(hash);
1336 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1337 spin_unlock_bucket(hash);
1348 fs_info(sdp, "found %u quota changes\n", found);
1353 gfs2_quota_cleanup(sdp);
1357 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1359 struct list_head *head = &sdp->sd_quota_list;
1360 struct gfs2_quota_data *qd;
1362 spin_lock(&qd_lock);
1363 while (!list_empty(head)) {
1364 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1366 list_del(&qd->qd_list);
1368 /* Also remove if this qd exists in the reclaim list */
1369 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
1370 atomic_dec(&sdp->sd_quota_count);
1371 spin_unlock(&qd_lock);
1373 spin_lock_bucket(qd->qd_hash);
1374 hlist_bl_del_rcu(&qd->qd_hlist);
1375 spin_unlock_bucket(qd->qd_hash);
1377 gfs2_assert_warn(sdp, !qd->qd_change);
1378 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1379 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1381 gfs2_glock_put(qd->qd_gl);
1382 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
1384 spin_lock(&qd_lock);
1386 spin_unlock(&qd_lock);
1388 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1390 kvfree(sdp->sd_quota_bitmap);
1391 sdp->sd_quota_bitmap = NULL;
1394 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1396 if (error == 0 || error == -EROFS)
1398 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1399 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1402 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1403 int (*fxn)(struct super_block *sb, int type),
1404 unsigned long t, unsigned long *timeo,
1405 unsigned int *new_timeo)
1408 int error = fxn(sdp->sd_vfs, 0);
1409 quotad_error(sdp, msg, error);
1410 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1416 static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1418 struct gfs2_inode *ip;
1422 spin_lock(&sdp->sd_trunc_lock);
1423 if (!list_empty(&sdp->sd_trunc_list)) {
1424 ip = list_entry(sdp->sd_trunc_list.next,
1425 struct gfs2_inode, i_trunc_list);
1426 list_del_init(&ip->i_trunc_list);
1428 spin_unlock(&sdp->sd_trunc_lock);
1431 gfs2_glock_finish_truncate(ip);
1435 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1436 if (!sdp->sd_statfs_force_sync) {
1437 sdp->sd_statfs_force_sync = 1;
1438 wake_up(&sdp->sd_quota_wait);
1444 * gfs2_quotad - Write cached quota changes into the quota file
1445 * @sdp: Pointer to GFS2 superblock
1449 int gfs2_quotad(void *data)
1451 struct gfs2_sbd *sdp = data;
1452 struct gfs2_tune *tune = &sdp->sd_tune;
1453 unsigned long statfs_timeo = 0;
1454 unsigned long quotad_timeo = 0;
1455 unsigned long t = 0;
1459 while (!kthread_should_stop()) {
1461 /* Update the master statfs file */
1462 if (sdp->sd_statfs_force_sync) {
1463 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1464 quotad_error(sdp, "statfs", error);
1465 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1468 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1470 &tune->gt_statfs_quantum);
1472 /* Update quota file */
1473 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1474 "ad_timeo, &tune->gt_quota_quantum);
1476 /* Check for & recover partially truncated inodes */
1477 quotad_check_trunc_list(sdp);
1481 t = min(quotad_timeo, statfs_timeo);
1483 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
1484 spin_lock(&sdp->sd_trunc_lock);
1485 empty = list_empty(&sdp->sd_trunc_list);
1486 spin_unlock(&sdp->sd_trunc_lock);
1487 if (empty && !sdp->sd_statfs_force_sync)
1488 t -= schedule_timeout(t);
1491 finish_wait(&sdp->sd_quota_wait, &wait);
1497 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1499 struct gfs2_sbd *sdp = sb->s_fs_info;
1501 memset(state, 0, sizeof(*state));
1503 switch (sdp->sd_args.ar_quota) {
1505 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1506 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1508 case GFS2_QUOTA_ACCOUNT:
1509 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1511 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1514 case GFS2_QUOTA_OFF:
1517 if (sdp->sd_quota_inode) {
1518 state->s_state[USRQUOTA].ino =
1519 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1520 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1522 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1523 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1524 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1528 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1529 struct qc_dqblk *fdq)
1531 struct gfs2_sbd *sdp = sb->s_fs_info;
1532 struct gfs2_quota_lvb *qlvb;
1533 struct gfs2_quota_data *qd;
1534 struct gfs2_holder q_gh;
1537 memset(fdq, 0, sizeof(*fdq));
1539 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1540 return -ESRCH; /* Crazy XFS error code */
1542 if ((qid.type != USRQUOTA) &&
1543 (qid.type != GRPQUOTA))
1546 error = qd_get(sdp, qid, &qd);
1549 error = do_glock(qd, FORCE, &q_gh);
1553 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1554 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1555 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1556 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1558 gfs2_glock_dq_uninit(&q_gh);
1564 /* GFS2 only supports a subset of the XFS fields */
1565 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1567 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1568 struct qc_dqblk *fdq)
1570 struct gfs2_sbd *sdp = sb->s_fs_info;
1571 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1572 struct gfs2_quota_data *qd;
1573 struct gfs2_holder q_gh, i_gh;
1574 unsigned int data_blocks, ind_blocks;
1575 unsigned int blocks = 0;
1580 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1581 return -ESRCH; /* Crazy XFS error code */
1583 if ((qid.type != USRQUOTA) &&
1584 (qid.type != GRPQUOTA))
1587 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1590 error = qd_get(sdp, qid, &qd);
1594 error = gfs2_rs_alloc(ip);
1598 mutex_lock(&ip->i_inode.i_mutex);
1599 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1602 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1606 /* Check for existing entry, if none then alloc new blocks */
1607 error = update_qd(sdp, qd);
1611 /* If nothing has changed, this is a no-op */
1612 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1613 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1614 fdq->d_fieldmask ^= QC_SPC_SOFT;
1616 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1617 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1618 fdq->d_fieldmask ^= QC_SPC_HARD;
1620 if ((fdq->d_fieldmask & QC_SPACE) &&
1621 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1622 fdq->d_fieldmask ^= QC_SPACE;
1624 if (fdq->d_fieldmask == 0)
1627 offset = qd2offset(qd);
1628 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1629 if (gfs2_is_stuffed(ip))
1631 if (alloc_required) {
1632 struct gfs2_alloc_parms ap = { .aflags = 0, };
1633 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1634 &data_blocks, &ind_blocks);
1635 blocks = 1 + data_blocks + ind_blocks;
1637 error = gfs2_inplace_reserve(ip, &ap);
1640 blocks += gfs2_rg_blocks(ip, blocks);
1643 /* Some quotas span block boundaries and can update two blocks,
1644 adding an extra block to the transaction to handle such quotas */
1645 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1650 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1652 gfs2_trans_end(sdp);
1655 gfs2_inplace_release(ip);
1657 gfs2_glock_dq_uninit(&i_gh);
1659 gfs2_glock_dq_uninit(&q_gh);
1661 mutex_unlock(&ip->i_inode.i_mutex);
1667 const struct quotactl_ops gfs2_quotactl_ops = {
1668 .quota_sync = gfs2_quota_sync,
1669 .get_state = gfs2_quota_get_state,
1670 .get_dqblk = gfs2_get_dqblk,
1671 .set_dqblk = gfs2_set_dqblk,
1674 void __init gfs2_quota_hash_init(void)
1678 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1679 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);