1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
8 * Quota change tags are associated with each transaction that allocates or
9 * deallocates space. Those changes are accumulated locally to each node (in a
10 * per-node file) and then are periodically synced to the quota file. This
11 * avoids the bottleneck of constantly touching the quota file, but introduces
12 * fuzziness in the current usage value of IDs that are being used on different
13 * nodes in the cluster simultaneously. So, it is possible for a user on
14 * multiple nodes to overrun their quota, but that overrun is controlable.
15 * Since quota tags are part of transactions, there is no need for a quota check
16 * program to be run on node crashes or anything like that.
18 * There are couple of knobs that let the administrator manage the quota
19 * fuzziness. "quota_quantum" sets the maximum time a quota change can be
20 * sitting on one node before being synced to the quota file. (The default is
21 * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency
22 * of quota file syncs increases as the user moves closer to their limit. The
23 * more frequent the syncs, the more accurate the quota enforcement, but that
24 * means that there is more contention between the nodes for the quota file.
25 * The default value is one. This sets the maximum theoretical quota overrun
26 * (with infinite node with infinite bandwidth) to twice the user's limit. (In
27 * practice, the maximum overrun you see should be much less.) A "quota_scale"
28 * number greater than one makes quota syncs more frequent and reduces the
29 * maximum overrun. Numbers less than one (but greater than zero) make quota
30 * syncs less frequent.
32 * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
33 * the quota file, so it is not being constantly read.
36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 #include <linux/sched.h>
39 #include <linux/slab.h>
41 #include <linux/spinlock.h>
42 #include <linux/completion.h>
43 #include <linux/buffer_head.h>
44 #include <linux/sort.h>
46 #include <linux/bio.h>
47 #include <linux/gfs2_ondisk.h>
48 #include <linux/kthread.h>
49 #include <linux/freezer.h>
50 #include <linux/quota.h>
51 #include <linux/dqblk_xfs.h>
52 #include <linux/lockref.h>
53 #include <linux/list_lru.h>
54 #include <linux/rcupdate.h>
55 #include <linux/rculist_bl.h>
56 #include <linux/bit_spinlock.h>
57 #include <linux/jhash.h>
58 #include <linux/vmalloc.h>
74 #define GFS2_QD_HASH_SHIFT 12
75 #define GFS2_QD_HASH_SIZE BIT(GFS2_QD_HASH_SHIFT)
76 #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 struct gfs2_sbd *sdp = qd->qd_sbd;
114 kmem_cache_free(gfs2_quotad_cachep, qd);
115 if (atomic_dec_and_test(&sdp->sd_quota_count))
116 wake_up(&sdp->sd_kill_wait);
119 static void gfs2_qd_dispose(struct gfs2_quota_data *qd)
121 struct gfs2_sbd *sdp = qd->qd_sbd;
124 list_del(&qd->qd_list);
125 spin_unlock(&qd_lock);
127 spin_lock_bucket(qd->qd_hash);
128 hlist_bl_del_rcu(&qd->qd_hlist);
129 spin_unlock_bucket(qd->qd_hash);
131 if (!gfs2_withdrawn(sdp)) {
132 gfs2_assert_warn(sdp, !qd->qd_change);
133 gfs2_assert_warn(sdp, !qd->qd_slot_ref);
134 gfs2_assert_warn(sdp, !qd->qd_bh_count);
137 gfs2_glock_put(qd->qd_gl);
138 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
141 static void gfs2_qd_list_dispose(struct list_head *list)
143 struct gfs2_quota_data *qd;
145 while (!list_empty(list)) {
146 qd = list_first_entry(list, struct gfs2_quota_data, qd_lru);
147 list_del(&qd->qd_lru);
154 static enum lru_status gfs2_qd_isolate(struct list_head *item,
155 struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
157 struct list_head *dispose = arg;
158 struct gfs2_quota_data *qd =
159 list_entry(item, struct gfs2_quota_data, qd_lru);
160 enum lru_status status;
162 if (!spin_trylock(&qd->qd_lockref.lock))
166 if (qd->qd_lockref.count == 0) {
167 lockref_mark_dead(&qd->qd_lockref);
168 list_lru_isolate_move(lru, &qd->qd_lru, dispose);
169 status = LRU_REMOVED;
172 spin_unlock(&qd->qd_lockref.lock);
176 static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
177 struct shrink_control *sc)
182 if (!(sc->gfp_mask & __GFP_FS))
185 freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
186 gfs2_qd_isolate, &dispose);
188 gfs2_qd_list_dispose(&dispose);
193 static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
194 struct shrink_control *sc)
196 return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
199 static struct shrinker *gfs2_qd_shrinker;
201 int __init gfs2_qd_shrinker_init(void)
203 gfs2_qd_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "gfs2-qd");
204 if (!gfs2_qd_shrinker)
207 gfs2_qd_shrinker->count_objects = gfs2_qd_shrink_count;
208 gfs2_qd_shrinker->scan_objects = gfs2_qd_shrink_scan;
210 shrinker_register(gfs2_qd_shrinker);
215 void gfs2_qd_shrinker_exit(void)
217 shrinker_free(gfs2_qd_shrinker);
220 static u64 qd2index(struct gfs2_quota_data *qd)
222 struct kqid qid = qd->qd_id;
223 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
224 ((qid.type == USRQUOTA) ? 0 : 1);
227 static u64 qd2offset(struct gfs2_quota_data *qd)
229 return qd2index(qd) * sizeof(struct gfs2_quota);
232 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
234 struct gfs2_quota_data *qd;
237 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
242 qd->qd_lockref.count = 0;
243 spin_lock_init(&qd->qd_lockref.lock);
246 INIT_LIST_HEAD(&qd->qd_lru);
249 error = gfs2_glock_get(sdp, qd2index(qd),
250 &gfs2_quota_glops, CREATE, &qd->qd_gl);
257 kmem_cache_free(gfs2_quotad_cachep, qd);
261 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
262 const struct gfs2_sbd *sdp,
265 struct gfs2_quota_data *qd;
266 struct hlist_bl_node *h;
268 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
269 if (!qid_eq(qd->qd_id, qid))
271 if (qd->qd_sbd != sdp)
273 if (lockref_get_not_dead(&qd->qd_lockref)) {
274 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
283 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
284 struct gfs2_quota_data **qdp)
286 struct gfs2_quota_data *qd, *new_qd;
287 unsigned int hash = gfs2_qd_hash(sdp, qid);
290 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
296 new_qd = qd_alloc(hash, sdp, qid);
301 spin_lock_bucket(hash);
302 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
304 new_qd->qd_lockref.count++;
306 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
307 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
308 atomic_inc(&sdp->sd_quota_count);
310 spin_unlock_bucket(hash);
311 spin_unlock(&qd_lock);
314 gfs2_glock_put(new_qd->qd_gl);
315 kmem_cache_free(gfs2_quotad_cachep, new_qd);
322 static void qd_hold(struct gfs2_quota_data *qd)
324 struct gfs2_sbd *sdp = qd->qd_sbd;
325 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
326 lockref_get(&qd->qd_lockref);
329 static void qd_put(struct gfs2_quota_data *qd)
331 struct gfs2_sbd *sdp;
333 if (lockref_put_or_lock(&qd->qd_lockref))
336 BUG_ON(__lockref_is_dead(&qd->qd_lockref));
338 if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) {
339 lockref_mark_dead(&qd->qd_lockref);
340 spin_unlock(&qd->qd_lockref.lock);
346 qd->qd_lockref.count = 0;
347 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
348 spin_unlock(&qd->qd_lockref.lock);
351 static int slot_get(struct gfs2_quota_data *qd)
353 struct gfs2_sbd *sdp = qd->qd_sbd;
357 spin_lock(&sdp->sd_bitmap_lock);
358 if (qd->qd_slot_ref == 0) {
359 bit = find_first_zero_bit(sdp->sd_quota_bitmap,
360 sdp->sd_quota_slots);
361 if (bit >= sdp->sd_quota_slots) {
365 set_bit(bit, sdp->sd_quota_bitmap);
370 spin_unlock(&sdp->sd_bitmap_lock);
374 static void slot_hold(struct gfs2_quota_data *qd)
376 struct gfs2_sbd *sdp = qd->qd_sbd;
378 spin_lock(&sdp->sd_bitmap_lock);
379 gfs2_assert(sdp, qd->qd_slot_ref);
381 spin_unlock(&sdp->sd_bitmap_lock);
384 static void slot_put(struct gfs2_quota_data *qd)
386 struct gfs2_sbd *sdp = qd->qd_sbd;
388 spin_lock(&sdp->sd_bitmap_lock);
389 gfs2_assert(sdp, qd->qd_slot_ref);
390 if (!--qd->qd_slot_ref) {
391 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
394 spin_unlock(&sdp->sd_bitmap_lock);
397 static int bh_get(struct gfs2_quota_data *qd)
399 struct gfs2_sbd *sdp = qd->qd_sbd;
400 struct inode *inode = sdp->sd_qc_inode;
401 struct gfs2_inode *ip = GFS2_I(inode);
402 unsigned int block, offset;
403 struct buffer_head *bh;
404 struct iomap iomap = { };
407 mutex_lock(&sdp->sd_quota_mutex);
409 if (qd->qd_bh_count++) {
410 mutex_unlock(&sdp->sd_quota_mutex);
414 block = qd->qd_slot / sdp->sd_qc_per_block;
415 offset = qd->qd_slot % sdp->sd_qc_per_block;
417 error = gfs2_iomap_get(inode,
418 (loff_t)block << inode->i_blkbits,
419 i_blocksize(inode), &iomap);
423 if (iomap.type != IOMAP_MAPPED)
426 error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits,
431 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
435 qd->qd_bh_qc = (struct gfs2_quota_change *)
436 (bh->b_data + sizeof(struct gfs2_meta_header) +
437 offset * sizeof(struct gfs2_quota_change));
439 mutex_unlock(&sdp->sd_quota_mutex);
447 mutex_unlock(&sdp->sd_quota_mutex);
451 static void bh_put(struct gfs2_quota_data *qd)
453 struct gfs2_sbd *sdp = qd->qd_sbd;
455 mutex_lock(&sdp->sd_quota_mutex);
456 gfs2_assert(sdp, qd->qd_bh_count);
457 if (!--qd->qd_bh_count) {
462 mutex_unlock(&sdp->sd_quota_mutex);
465 static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
468 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
469 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
470 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
474 * If qd_change is 0 it means a pending quota change was negated.
475 * We should not sync it, but we still have a qd reference and slot
476 * reference taken by gfs2_quota_change -> do_qc that need to be put.
478 if (!qd->qd_change && test_and_clear_bit(QDF_CHANGE, &qd->qd_flags)) {
484 if (!lockref_get_not_dead(&qd->qd_lockref))
487 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
488 set_bit(QDF_LOCKED, &qd->qd_flags);
489 qd->qd_change_sync = qd->qd_change;
494 static int qd_bh_get_or_undo(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
502 clear_bit(QDF_LOCKED, &qd->qd_flags);
508 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
510 struct gfs2_quota_data *qd = NULL, *iter;
515 if (sb_rdonly(sdp->sd_vfs))
520 list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) {
521 if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) {
527 spin_unlock(&qd_lock);
530 error = qd_bh_get_or_undo(sdp, qd);
539 static void qdsb_put(struct gfs2_quota_data *qd)
546 static void qd_unlock(struct gfs2_quota_data *qd)
548 gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags));
549 clear_bit(QDF_LOCKED, &qd->qd_flags);
553 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
554 struct gfs2_quota_data **qdp)
558 error = qd_get(sdp, qid, qdp);
562 error = slot_get(*qdp);
566 error = bh_get(*qdp);
580 * gfs2_qa_get - make sure we have a quota allocations data structure,
582 * @ip: the inode for this reservation
584 int gfs2_qa_get(struct gfs2_inode *ip)
586 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
587 struct inode *inode = &ip->i_inode;
589 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
592 spin_lock(&inode->i_lock);
593 if (ip->i_qadata == NULL) {
594 struct gfs2_qadata *tmp;
596 spin_unlock(&inode->i_lock);
597 tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
601 spin_lock(&inode->i_lock);
602 if (ip->i_qadata == NULL)
605 kmem_cache_free(gfs2_qadata_cachep, tmp);
607 ip->i_qadata->qa_ref++;
608 spin_unlock(&inode->i_lock);
612 void gfs2_qa_put(struct gfs2_inode *ip)
614 struct inode *inode = &ip->i_inode;
616 spin_lock(&inode->i_lock);
617 if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
618 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
621 spin_unlock(&inode->i_lock);
624 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
626 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
627 struct gfs2_quota_data **qd;
630 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
633 error = gfs2_qa_get(ip);
637 qd = ip->i_qadata->qa_qd;
639 if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
640 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
646 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
649 ip->i_qadata->qa_qd_num++;
652 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
655 ip->i_qadata->qa_qd_num++;
658 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
659 !uid_eq(uid, ip->i_inode.i_uid)) {
660 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
663 ip->i_qadata->qa_qd_num++;
667 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
668 !gid_eq(gid, ip->i_inode.i_gid)) {
669 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
672 ip->i_qadata->qa_qd_num++;
678 gfs2_quota_unhold(ip);
683 void gfs2_quota_unhold(struct gfs2_inode *ip)
685 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
688 if (ip->i_qadata == NULL)
691 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
693 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
694 qdsb_put(ip->i_qadata->qa_qd[x]);
695 ip->i_qadata->qa_qd[x] = NULL;
697 ip->i_qadata->qa_qd_num = 0;
701 static int sort_qd(const void *a, const void *b)
703 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
704 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
706 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
708 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
713 static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type)
715 struct gfs2_sbd *sdp = qd->qd_sbd;
716 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
717 struct gfs2_quota_change *qc = qd->qd_bh_qc;
720 mutex_lock(&sdp->sd_quota_mutex);
721 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
723 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
726 if (qd->qd_id.type == USRQUOTA)
727 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
728 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
731 x = be64_to_cpu(qc->qc_change) + change;
732 qc->qc_change = cpu_to_be64(x);
736 spin_unlock(&qd_lock);
738 if (qc_type == QC_CHANGE) {
739 if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
744 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
745 clear_bit(QDF_CHANGE, &qd->qd_flags);
752 if (change < 0) /* Reset quiet flag if we freed some blocks */
753 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
754 mutex_unlock(&sdp->sd_quota_mutex);
757 static int gfs2_write_buf_to_page(struct gfs2_sbd *sdp, unsigned long index,
758 unsigned off, void *buf, unsigned bytes)
760 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
761 struct inode *inode = &ip->i_inode;
762 struct address_space *mapping = inode->i_mapping;
764 struct buffer_head *bh;
766 unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
767 unsigned to_write = bytes, pg_off = off;
769 blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
772 folio = filemap_grab_folio(mapping, index);
774 return PTR_ERR(folio);
775 bh = folio_buffers(folio);
777 bh = create_empty_buffers(folio, bsize, 0);
780 /* Find the beginning block within the folio */
781 if (pg_off >= ((bnum * bsize) + bsize)) {
782 bh = bh->b_this_page;
787 if (!buffer_mapped(bh)) {
788 gfs2_block_map(inode, blk, bh, 1);
789 if (!buffer_mapped(bh))
791 /* If it's a newly allocated disk block, zero it */
793 folio_zero_range(folio, bnum * bsize,
796 if (folio_test_uptodate(folio))
797 set_buffer_uptodate(bh);
798 if (bh_read(bh, REQ_META | REQ_PRIO) < 0)
800 gfs2_trans_add_data(ip->i_gl, bh);
802 /* If we need to write to the next block as well */
803 if (to_write > (bsize - boff)) {
804 pg_off += (bsize - boff);
805 to_write -= (bsize - boff);
806 boff = pg_off % bsize;
812 /* Write to the folio, now that we have setup the buffer(s) */
813 memcpy_to_folio(folio, off, buf, bytes);
814 flush_dcache_folio(folio);
826 static int gfs2_write_disk_quota(struct gfs2_sbd *sdp, struct gfs2_quota *qp,
829 unsigned long pg_beg;
830 unsigned pg_off, nbytes, overflow = 0;
834 nbytes = sizeof(struct gfs2_quota);
836 pg_beg = loc >> PAGE_SHIFT;
837 pg_off = offset_in_page(loc);
839 /* If the quota straddles a page boundary, split the write in two */
840 if ((pg_off + nbytes) > PAGE_SIZE)
841 overflow = (pg_off + nbytes) - PAGE_SIZE;
844 error = gfs2_write_buf_to_page(sdp, pg_beg, pg_off, ptr,
846 /* If there's an overflow, write the remaining bytes to the next page */
847 if (!error && overflow)
848 error = gfs2_write_buf_to_page(sdp, pg_beg + 1, 0,
849 ptr + nbytes - overflow,
855 * gfs2_adjust_quota - adjust record of current block usage
856 * @sdp: The superblock
857 * @loc: Offset of the entry in the quota file
858 * @change: The amount of usage change to record
859 * @qd: The quota data
860 * @fdq: The updated limits to record
862 * This function was mostly borrowed from gfs2_block_truncate_page which was
863 * in turn mostly borrowed from ext3
865 * Returns: 0 or -ve on error
868 static int gfs2_adjust_quota(struct gfs2_sbd *sdp, loff_t loc,
869 s64 change, struct gfs2_quota_data *qd,
870 struct qc_dqblk *fdq)
872 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
873 struct inode *inode = &ip->i_inode;
878 if (gfs2_is_stuffed(ip)) {
879 err = gfs2_unstuff_dinode(ip);
884 memset(&q, 0, sizeof(struct gfs2_quota));
885 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
889 loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
890 be64_add_cpu(&q.qu_value, change);
891 if (((s64)be64_to_cpu(q.qu_value)) < 0)
892 q.qu_value = 0; /* Never go negative on quota usage */
893 qd->qd_qb.qb_value = q.qu_value;
895 if (fdq->d_fieldmask & QC_SPC_SOFT) {
896 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
897 qd->qd_qb.qb_warn = q.qu_warn;
899 if (fdq->d_fieldmask & QC_SPC_HARD) {
900 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
901 qd->qd_qb.qb_limit = q.qu_limit;
903 if (fdq->d_fieldmask & QC_SPACE) {
904 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
905 qd->qd_qb.qb_value = q.qu_value;
909 err = gfs2_write_disk_quota(sdp, &q, loc);
911 size = loc + sizeof(struct gfs2_quota);
912 if (size > inode->i_size)
913 i_size_write(inode, size);
914 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
915 mark_inode_dirty(inode);
916 set_bit(QDF_REFRESH, &qd->qd_flags);
922 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
924 struct gfs2_sbd *sdp = (*qda)->qd_sbd;
925 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
926 struct gfs2_alloc_parms ap = {};
927 unsigned int data_blocks, ind_blocks;
928 struct gfs2_holder *ghs, i_gh;
930 struct gfs2_quota_data *qd;
933 unsigned int nalloc = 0, blocks;
936 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
937 &data_blocks, &ind_blocks);
939 ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
943 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
944 inode_lock(&ip->i_inode);
945 for (qx = 0; qx < num_qd; qx++) {
946 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
947 GL_NOCACHE, &ghs[qx]);
952 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
956 for (x = 0; x < num_qd; x++) {
957 offset = qd2offset(qda[x]);
958 if (gfs2_write_alloc_required(ip, offset,
959 sizeof(struct gfs2_quota)))
964 * 1 blk for unstuffing inode if stuffed. We add this extra
965 * block to the reservation unconditionally. If the inode
966 * doesn't need unstuffing, the block will be released to the
967 * rgrp since it won't be allocated during the transaction
969 /* +3 in the end for unstuffing block, inode size update block
970 * and another block in case quota straddles page boundary and
971 * two blocks need to be updated instead of 1 */
972 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
974 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
975 ap.target = reserved;
976 error = gfs2_inplace_reserve(ip, &ap);
981 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
983 error = gfs2_trans_begin(sdp, blocks, 0);
987 for (x = 0; x < num_qd; x++) {
989 offset = qd2offset(qd);
990 error = gfs2_adjust_quota(sdp, offset, qd->qd_change_sync, qd,
995 do_qc(qd, -qd->qd_change_sync, QC_SYNC);
996 set_bit(QDF_REFRESH, &qd->qd_flags);
1000 gfs2_trans_end(sdp);
1002 gfs2_inplace_release(ip);
1004 gfs2_glock_dq_uninit(&i_gh);
1007 gfs2_glock_dq_uninit(&ghs[qx]);
1008 inode_unlock(&ip->i_inode);
1010 gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
1011 GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
1013 for (x = 0; x < num_qd; x++)
1014 qda[x]->qd_sync_gen = sdp->sd_quota_sync_gen;
1019 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
1021 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1022 struct gfs2_quota q;
1023 struct gfs2_quota_lvb *qlvb;
1027 memset(&q, 0, sizeof(struct gfs2_quota));
1028 pos = qd2offset(qd);
1029 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
1033 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1034 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
1036 qlvb->qb_limit = q.qu_limit;
1037 qlvb->qb_warn = q.qu_warn;
1038 qlvb->qb_value = q.qu_value;
1044 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
1045 struct gfs2_holder *q_gh)
1047 struct gfs2_sbd *sdp = qd->qd_sbd;
1048 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1049 struct gfs2_holder i_gh;
1052 gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd);
1054 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
1058 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1059 force_refresh = FORCE;
1061 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1063 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
1064 gfs2_glock_dq_uninit(q_gh);
1065 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1070 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1074 error = update_qd(sdp, qd);
1078 gfs2_glock_dq_uninit(&i_gh);
1079 gfs2_glock_dq_uninit(q_gh);
1087 gfs2_glock_dq_uninit(&i_gh);
1089 gfs2_glock_dq_uninit(q_gh);
1093 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
1095 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1096 struct gfs2_quota_data *qd;
1100 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1103 error = gfs2_quota_hold(ip, uid, gid);
1107 sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
1108 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
1110 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1111 qd = ip->i_qadata->qa_qd[x];
1112 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
1118 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1121 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1122 gfs2_quota_unhold(ip);
1128 static bool need_sync(struct gfs2_quota_data *qd)
1130 struct gfs2_sbd *sdp = qd->qd_sbd;
1131 struct gfs2_tune *gt = &sdp->sd_tune;
1133 unsigned int num, den;
1135 if (!qd->qd_qb.qb_limit)
1138 spin_lock(&qd_lock);
1139 value = qd->qd_change;
1140 spin_unlock(&qd_lock);
1142 spin_lock(>->gt_spin);
1143 num = gt->gt_quota_scale_num;
1144 den = gt->gt_quota_scale_den;
1145 spin_unlock(>->gt_spin);
1149 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1150 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1153 value *= gfs2_jindex_size(sdp) * num;
1154 value = div_s64(value, den);
1155 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
1156 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1163 void gfs2_quota_unlock(struct gfs2_inode *ip)
1165 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1166 struct gfs2_quota_data *qda[2 * GFS2_MAXQUOTAS];
1167 unsigned int count = 0;
1171 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1174 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1175 struct gfs2_quota_data *qd;
1178 qd = ip->i_qadata->qa_qd[x];
1179 sync = need_sync(qd);
1181 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1185 spin_lock(&qd_lock);
1186 found = qd_check_sync(sdp, qd, NULL);
1187 spin_unlock(&qd_lock);
1192 if (!qd_bh_get_or_undo(sdp, qd))
1197 do_sync(count, qda);
1198 for (x = 0; x < count; x++)
1202 gfs2_quota_unhold(ip);
1205 #define MAX_LINE 256
1207 static void print_message(struct gfs2_quota_data *qd, char *type)
1209 struct gfs2_sbd *sdp = qd->qd_sbd;
1211 if (sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) {
1212 fs_info(sdp, "quota %s for %s %u\n",
1214 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1215 from_kqid(&init_user_ns, qd->qd_id));
1220 * gfs2_quota_check - check if allocating new blocks will exceed quota
1221 * @ip: The inode for which this check is being performed
1222 * @uid: The uid to check against
1223 * @gid: The gid to check against
1224 * @ap: The allocation parameters. ap->target contains the requested
1225 * blocks. ap->min_target, if set, contains the minimum blks
1228 * Returns: 0 on success.
1229 * min_req = ap->min_target ? ap->min_target : ap->target;
1230 * quota must allow at least min_req blks for success and
1231 * ap->allowed is set to the number of blocks allowed
1233 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1234 * of blocks available.
1236 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1237 struct gfs2_alloc_parms *ap)
1239 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1240 struct gfs2_quota_data *qd;
1241 s64 value, warn, limit;
1245 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1246 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1249 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1250 qd = ip->i_qadata->qa_qd[x];
1252 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1253 qid_eq(qd->qd_id, make_kqid_gid(gid))))
1256 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1257 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1258 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1259 spin_lock(&qd_lock);
1260 value += qd->qd_change;
1261 spin_unlock(&qd_lock);
1263 if (limit > 0 && (limit - value) < ap->allowed)
1264 ap->allowed = limit - value;
1265 /* If we can't meet the target */
1266 if (limit && limit < (value + (s64)ap->target)) {
1267 /* If no min_target specified or we don't meet
1268 * min_target, return -EDQUOT */
1269 if (!ap->min_target || ap->min_target > ap->allowed) {
1270 if (!test_and_set_bit(QDF_QMSG_QUIET,
1272 print_message(qd, "exceeded");
1273 quota_send_warning(qd->qd_id,
1275 QUOTA_NL_BHARDWARN);
1280 } else if (warn && warn < value &&
1281 time_after_eq(jiffies, qd->qd_last_warn +
1282 gfs2_tune_get(sdp, gt_quota_warn_period)
1284 quota_send_warning(qd->qd_id,
1285 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1286 print_message(qd, "warning");
1288 qd->qd_last_warn = jiffies;
1294 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1295 kuid_t uid, kgid_t gid)
1297 struct gfs2_quota_data *qd;
1299 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1301 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF ||
1302 gfs2_assert_warn(sdp, change))
1304 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1307 if (gfs2_assert_withdraw(sdp, ip->i_qadata &&
1308 ip->i_qadata->qa_ref > 0))
1310 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1311 qd = ip->i_qadata->qa_qd[x];
1313 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1314 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1315 do_qc(qd, change, QC_CHANGE);
1320 static bool qd_changed(struct gfs2_sbd *sdp)
1322 struct gfs2_quota_data *qd;
1323 bool changed = false;
1325 spin_lock(&qd_lock);
1326 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1327 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
1328 !test_bit(QDF_CHANGE, &qd->qd_flags))
1334 spin_unlock(&qd_lock);
1338 int gfs2_quota_sync(struct super_block *sb, int type)
1340 struct gfs2_sbd *sdp = sb->s_fs_info;
1341 struct gfs2_quota_data **qda;
1342 unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder);
1343 unsigned int num_qd;
1347 if (!qd_changed(sdp))
1350 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1354 mutex_lock(&sdp->sd_quota_sync_mutex);
1355 sdp->sd_quota_sync_gen++;
1361 error = qd_fish(sdp, qda + num_qd);
1362 if (error || !qda[num_qd])
1364 if (++num_qd == max_qd)
1370 error = do_sync(num_qd, qda);
1372 for (x = 0; x < num_qd; x++)
1375 } while (!error && num_qd == max_qd);
1377 mutex_unlock(&sdp->sd_quota_sync_mutex);
1383 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1385 struct gfs2_quota_data *qd;
1386 struct gfs2_holder q_gh;
1389 error = qd_get(sdp, qid, &qd);
1393 error = do_glock(qd, FORCE, &q_gh);
1395 gfs2_glock_dq_uninit(&q_gh);
1401 int gfs2_quota_init(struct gfs2_sbd *sdp)
1403 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1404 u64 size = i_size_read(sdp->sd_qc_inode);
1405 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1406 unsigned int x, slot = 0;
1407 unsigned int found = 0;
1409 unsigned int bm_size;
1414 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1417 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1418 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1419 bm_size *= sizeof(unsigned long);
1421 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1422 if (sdp->sd_quota_bitmap == NULL)
1423 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1425 if (!sdp->sd_quota_bitmap)
1428 for (x = 0; x < blocks; x++) {
1429 struct buffer_head *bh;
1430 const struct gfs2_quota_change *qc;
1435 error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen);
1440 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1443 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1448 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1449 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1451 struct gfs2_quota_data *qd;
1452 s64 qc_change = be64_to_cpu(qc->qc_change);
1453 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1454 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1455 USRQUOTA : GRPQUOTA;
1456 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1457 be32_to_cpu(qc->qc_id));
1462 hash = gfs2_qd_hash(sdp, qc_id);
1463 qd = qd_alloc(hash, sdp, qc_id);
1469 set_bit(QDF_CHANGE, &qd->qd_flags);
1470 qd->qd_change = qc_change;
1472 qd->qd_slot_ref = 1;
1474 spin_lock(&qd_lock);
1475 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1476 list_add(&qd->qd_list, &sdp->sd_quota_list);
1477 atomic_inc(&sdp->sd_quota_count);
1478 spin_unlock(&qd_lock);
1480 spin_lock_bucket(hash);
1481 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1482 spin_unlock_bucket(hash);
1493 fs_info(sdp, "found %u quota changes\n", found);
1498 gfs2_quota_cleanup(sdp);
1502 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1504 struct gfs2_quota_data *qd;
1508 BUG_ON(test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags));
1510 spin_lock(&qd_lock);
1511 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1512 spin_lock(&qd->qd_lockref.lock);
1513 if (qd->qd_lockref.count != 0) {
1514 spin_unlock(&qd->qd_lockref.lock);
1517 lockref_mark_dead(&qd->qd_lockref);
1518 spin_unlock(&qd->qd_lockref.lock);
1520 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
1521 list_add(&qd->qd_lru, &dispose);
1523 spin_unlock(&qd_lock);
1525 gfs2_qd_list_dispose(&dispose);
1527 wait_event_timeout(sdp->sd_kill_wait,
1528 (count = atomic_read(&sdp->sd_quota_count)) == 0,
1532 fs_err(sdp, "%d left-over quota data objects\n", count);
1534 kvfree(sdp->sd_quota_bitmap);
1535 sdp->sd_quota_bitmap = NULL;
1538 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1540 if (error == 0 || error == -EROFS)
1542 if (!gfs2_withdrawn(sdp)) {
1543 if (!cmpxchg(&sdp->sd_log_error, 0, error))
1544 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1545 wake_up(&sdp->sd_logd_waitq);
1549 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1550 int (*fxn)(struct super_block *sb, int type),
1551 unsigned long t, unsigned long *timeo,
1552 unsigned int *new_timeo)
1555 int error = fxn(sdp->sd_vfs, 0);
1556 quotad_error(sdp, msg, error);
1557 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1563 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1564 if (!sdp->sd_statfs_force_sync) {
1565 sdp->sd_statfs_force_sync = 1;
1566 wake_up(&sdp->sd_quota_wait);
1572 * gfs2_quotad - Write cached quota changes into the quota file
1573 * @data: Pointer to GFS2 superblock
1577 int gfs2_quotad(void *data)
1579 struct gfs2_sbd *sdp = data;
1580 struct gfs2_tune *tune = &sdp->sd_tune;
1581 unsigned long statfs_timeo = 0;
1582 unsigned long quotad_timeo = 0;
1583 unsigned long t = 0;
1585 while (!kthread_should_stop()) {
1586 if (gfs2_withdrawn(sdp))
1589 /* Update the master statfs file */
1590 if (sdp->sd_statfs_force_sync) {
1591 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1592 quotad_error(sdp, "statfs", error);
1593 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1596 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1598 &tune->gt_statfs_quantum);
1600 /* Update quota file */
1601 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1602 "ad_timeo, &tune->gt_quota_quantum);
1606 t = min(quotad_timeo, statfs_timeo);
1608 t = wait_event_interruptible_timeout(sdp->sd_quota_wait,
1609 sdp->sd_statfs_force_sync ||
1610 gfs2_withdrawn(sdp) ||
1611 kthread_should_stop(),
1614 if (sdp->sd_statfs_force_sync)
1621 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1623 struct gfs2_sbd *sdp = sb->s_fs_info;
1625 memset(state, 0, sizeof(*state));
1627 switch (sdp->sd_args.ar_quota) {
1628 case GFS2_QUOTA_QUIET:
1631 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1632 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1634 case GFS2_QUOTA_ACCOUNT:
1635 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1637 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1640 case GFS2_QUOTA_OFF:
1643 if (sdp->sd_quota_inode) {
1644 state->s_state[USRQUOTA].ino =
1645 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1646 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1648 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1649 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1650 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1654 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1655 struct qc_dqblk *fdq)
1657 struct gfs2_sbd *sdp = sb->s_fs_info;
1658 struct gfs2_quota_lvb *qlvb;
1659 struct gfs2_quota_data *qd;
1660 struct gfs2_holder q_gh;
1663 memset(fdq, 0, sizeof(*fdq));
1665 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1666 return -ESRCH; /* Crazy XFS error code */
1668 if ((qid.type != USRQUOTA) &&
1669 (qid.type != GRPQUOTA))
1672 error = qd_get(sdp, qid, &qd);
1675 error = do_glock(qd, FORCE, &q_gh);
1679 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1680 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1681 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1682 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1684 gfs2_glock_dq_uninit(&q_gh);
1690 /* GFS2 only supports a subset of the XFS fields */
1691 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1693 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1694 struct qc_dqblk *fdq)
1696 struct gfs2_sbd *sdp = sb->s_fs_info;
1697 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1698 struct gfs2_quota_data *qd;
1699 struct gfs2_holder q_gh, i_gh;
1700 unsigned int data_blocks, ind_blocks;
1701 unsigned int blocks = 0;
1706 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1707 return -ESRCH; /* Crazy XFS error code */
1709 if ((qid.type != USRQUOTA) &&
1710 (qid.type != GRPQUOTA))
1713 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1716 error = qd_get(sdp, qid, &qd);
1720 error = gfs2_qa_get(ip);
1724 inode_lock(&ip->i_inode);
1725 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1728 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1732 /* Check for existing entry, if none then alloc new blocks */
1733 error = update_qd(sdp, qd);
1737 /* If nothing has changed, this is a no-op */
1738 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1739 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1740 fdq->d_fieldmask ^= QC_SPC_SOFT;
1742 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1743 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1744 fdq->d_fieldmask ^= QC_SPC_HARD;
1746 if ((fdq->d_fieldmask & QC_SPACE) &&
1747 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1748 fdq->d_fieldmask ^= QC_SPACE;
1750 if (fdq->d_fieldmask == 0)
1753 offset = qd2offset(qd);
1754 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1755 if (gfs2_is_stuffed(ip))
1757 if (alloc_required) {
1758 struct gfs2_alloc_parms ap = {};
1759 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1760 &data_blocks, &ind_blocks);
1761 blocks = 1 + data_blocks + ind_blocks;
1763 error = gfs2_inplace_reserve(ip, &ap);
1766 blocks += gfs2_rg_blocks(ip, blocks);
1769 /* Some quotas span block boundaries and can update two blocks,
1770 adding an extra block to the transaction to handle such quotas */
1771 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1776 error = gfs2_adjust_quota(sdp, offset, 0, qd, fdq);
1778 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
1780 gfs2_trans_end(sdp);
1783 gfs2_inplace_release(ip);
1785 gfs2_glock_dq_uninit(&i_gh);
1787 gfs2_glock_dq_uninit(&q_gh);
1790 inode_unlock(&ip->i_inode);
1796 const struct quotactl_ops gfs2_quotactl_ops = {
1797 .quota_sync = gfs2_quota_sync,
1798 .get_state = gfs2_quota_get_state,
1799 .get_dqblk = gfs2_get_dqblk,
1800 .set_dqblk = gfs2_set_dqblk,
1803 void __init gfs2_quota_hash_init(void)
1807 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1808 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);