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_count);
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 struct shrinker gfs2_qd_shrinker = {
200 .count_objects = gfs2_qd_shrink_count,
201 .scan_objects = gfs2_qd_shrink_scan,
202 .seeks = DEFAULT_SEEKS,
203 .flags = SHRINKER_NUMA_AWARE,
207 static u64 qd2index(struct gfs2_quota_data *qd)
209 struct kqid qid = qd->qd_id;
210 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
211 ((qid.type == USRQUOTA) ? 0 : 1);
214 static u64 qd2offset(struct gfs2_quota_data *qd)
218 offset = qd2index(qd);
219 offset *= sizeof(struct gfs2_quota);
224 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
226 struct gfs2_quota_data *qd;
229 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
234 qd->qd_lockref.count = 0;
235 spin_lock_init(&qd->qd_lockref.lock);
238 INIT_LIST_HEAD(&qd->qd_lru);
241 error = gfs2_glock_get(sdp, qd2index(qd),
242 &gfs2_quota_glops, CREATE, &qd->qd_gl);
249 kmem_cache_free(gfs2_quotad_cachep, qd);
253 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
254 const struct gfs2_sbd *sdp,
257 struct gfs2_quota_data *qd;
258 struct hlist_bl_node *h;
260 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
261 if (!qid_eq(qd->qd_id, qid))
263 if (qd->qd_sbd != sdp)
265 if (lockref_get_not_dead(&qd->qd_lockref)) {
266 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
275 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
276 struct gfs2_quota_data **qdp)
278 struct gfs2_quota_data *qd, *new_qd;
279 unsigned int hash = gfs2_qd_hash(sdp, qid);
282 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
288 new_qd = qd_alloc(hash, sdp, qid);
293 spin_lock_bucket(hash);
294 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
296 new_qd->qd_lockref.count++;
298 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
299 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
300 atomic_inc(&sdp->sd_quota_count);
302 spin_unlock_bucket(hash);
303 spin_unlock(&qd_lock);
306 gfs2_glock_put(new_qd->qd_gl);
307 kmem_cache_free(gfs2_quotad_cachep, new_qd);
314 static void qd_hold(struct gfs2_quota_data *qd)
316 struct gfs2_sbd *sdp = qd->qd_sbd;
317 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
318 lockref_get(&qd->qd_lockref);
321 static void qd_put(struct gfs2_quota_data *qd)
323 struct gfs2_sbd *sdp;
325 if (lockref_put_or_lock(&qd->qd_lockref))
328 BUG_ON(__lockref_is_dead(&qd->qd_lockref));
330 if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) {
331 lockref_mark_dead(&qd->qd_lockref);
332 spin_unlock(&qd->qd_lockref.lock);
338 qd->qd_lockref.count = 0;
339 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
340 spin_unlock(&qd->qd_lockref.lock);
343 static int slot_get(struct gfs2_quota_data *qd)
345 struct gfs2_sbd *sdp = qd->qd_sbd;
349 spin_lock(&sdp->sd_bitmap_lock);
350 if (qd->qd_slot_count != 0)
354 bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
355 if (bit < sdp->sd_quota_slots) {
356 set_bit(bit, sdp->sd_quota_bitmap);
362 spin_unlock(&sdp->sd_bitmap_lock);
367 static void slot_hold(struct gfs2_quota_data *qd)
369 struct gfs2_sbd *sdp = qd->qd_sbd;
371 spin_lock(&sdp->sd_bitmap_lock);
372 gfs2_assert(sdp, qd->qd_slot_count);
374 spin_unlock(&sdp->sd_bitmap_lock);
377 static void slot_put(struct gfs2_quota_data *qd)
379 struct gfs2_sbd *sdp = qd->qd_sbd;
381 spin_lock(&sdp->sd_bitmap_lock);
382 gfs2_assert(sdp, qd->qd_slot_count);
383 if (!--qd->qd_slot_count) {
384 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
387 spin_unlock(&sdp->sd_bitmap_lock);
390 static int bh_get(struct gfs2_quota_data *qd)
392 struct gfs2_sbd *sdp = qd->qd_sbd;
393 struct inode *inode = sdp->sd_qc_inode;
394 struct gfs2_inode *ip = GFS2_I(inode);
395 unsigned int block, offset;
396 struct buffer_head *bh;
397 struct iomap iomap = { };
400 mutex_lock(&sdp->sd_quota_mutex);
402 if (qd->qd_bh_count++) {
403 mutex_unlock(&sdp->sd_quota_mutex);
407 block = qd->qd_slot / sdp->sd_qc_per_block;
408 offset = qd->qd_slot % sdp->sd_qc_per_block;
410 error = gfs2_iomap_get(inode,
411 (loff_t)block << inode->i_blkbits,
412 i_blocksize(inode), &iomap);
416 if (iomap.type != IOMAP_MAPPED)
419 error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits,
424 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
428 qd->qd_bh_qc = (struct gfs2_quota_change *)
429 (bh->b_data + sizeof(struct gfs2_meta_header) +
430 offset * sizeof(struct gfs2_quota_change));
432 mutex_unlock(&sdp->sd_quota_mutex);
440 mutex_unlock(&sdp->sd_quota_mutex);
444 static void bh_put(struct gfs2_quota_data *qd)
446 struct gfs2_sbd *sdp = qd->qd_sbd;
448 mutex_lock(&sdp->sd_quota_mutex);
449 gfs2_assert(sdp, qd->qd_bh_count);
450 if (!--qd->qd_bh_count) {
455 mutex_unlock(&sdp->sd_quota_mutex);
458 static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
461 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
462 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
463 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
466 if (!lockref_get_not_dead(&qd->qd_lockref))
469 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
470 set_bit(QDF_LOCKED, &qd->qd_flags);
471 qd->qd_change_sync = qd->qd_change;
476 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
478 struct gfs2_quota_data *qd = NULL, *iter;
483 if (sb_rdonly(sdp->sd_vfs))
488 list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) {
489 if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) {
495 spin_unlock(&qd_lock);
500 clear_bit(QDF_LOCKED, &qd->qd_flags);
512 static void qd_unlock(struct gfs2_quota_data *qd)
514 gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags));
515 clear_bit(QDF_LOCKED, &qd->qd_flags);
521 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
522 struct gfs2_quota_data **qdp)
526 error = qd_get(sdp, qid, qdp);
530 error = slot_get(*qdp);
534 error = bh_get(*qdp);
547 static void qdsb_put(struct gfs2_quota_data *qd)
555 * gfs2_qa_get - make sure we have a quota allocations data structure,
557 * @ip: the inode for this reservation
559 int gfs2_qa_get(struct gfs2_inode *ip)
561 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
562 struct inode *inode = &ip->i_inode;
564 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
567 spin_lock(&inode->i_lock);
568 if (ip->i_qadata == NULL) {
569 struct gfs2_qadata *tmp;
571 spin_unlock(&inode->i_lock);
572 tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
576 spin_lock(&inode->i_lock);
577 if (ip->i_qadata == NULL)
580 kmem_cache_free(gfs2_qadata_cachep, tmp);
582 ip->i_qadata->qa_ref++;
583 spin_unlock(&inode->i_lock);
587 void gfs2_qa_put(struct gfs2_inode *ip)
589 struct inode *inode = &ip->i_inode;
591 spin_lock(&inode->i_lock);
592 if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
593 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
596 spin_unlock(&inode->i_lock);
599 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
601 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
602 struct gfs2_quota_data **qd;
605 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
608 error = gfs2_qa_get(ip);
612 qd = ip->i_qadata->qa_qd;
614 if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
615 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
621 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
624 ip->i_qadata->qa_qd_num++;
627 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
630 ip->i_qadata->qa_qd_num++;
633 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
634 !uid_eq(uid, ip->i_inode.i_uid)) {
635 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
638 ip->i_qadata->qa_qd_num++;
642 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
643 !gid_eq(gid, ip->i_inode.i_gid)) {
644 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
647 ip->i_qadata->qa_qd_num++;
653 gfs2_quota_unhold(ip);
658 void gfs2_quota_unhold(struct gfs2_inode *ip)
660 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
663 if (ip->i_qadata == NULL)
666 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
668 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
669 qdsb_put(ip->i_qadata->qa_qd[x]);
670 ip->i_qadata->qa_qd[x] = NULL;
672 ip->i_qadata->qa_qd_num = 0;
676 static int sort_qd(const void *a, const void *b)
678 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
679 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
681 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
683 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
688 static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type)
690 struct gfs2_sbd *sdp = qd->qd_sbd;
691 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
692 struct gfs2_quota_change *qc = qd->qd_bh_qc;
695 mutex_lock(&sdp->sd_quota_mutex);
696 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
698 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
701 if (qd->qd_id.type == USRQUOTA)
702 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
703 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
706 x = be64_to_cpu(qc->qc_change) + change;
707 qc->qc_change = cpu_to_be64(x);
711 spin_unlock(&qd_lock);
713 if (qc_type == QC_CHANGE) {
714 if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
719 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
720 clear_bit(QDF_CHANGE, &qd->qd_flags);
727 if (change < 0) /* Reset quiet flag if we freed some blocks */
728 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
729 mutex_unlock(&sdp->sd_quota_mutex);
732 static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index,
733 unsigned off, void *buf, unsigned bytes)
735 struct inode *inode = &ip->i_inode;
736 struct gfs2_sbd *sdp = GFS2_SB(inode);
737 struct address_space *mapping = inode->i_mapping;
739 struct buffer_head *bh;
741 unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
742 unsigned to_write = bytes, pg_off = off;
745 blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
748 page = grab_cache_page(mapping, index);
751 if (!page_has_buffers(page))
752 create_empty_buffers(page, bsize, 0);
754 bh = page_buffers(page);
756 /* Find the beginning block within the page */
757 if (pg_off >= ((bnum * bsize) + bsize)) {
758 bh = bh->b_this_page;
763 if (!buffer_mapped(bh)) {
764 gfs2_block_map(inode, blk, bh, 1);
765 if (!buffer_mapped(bh))
767 /* If it's a newly allocated disk block, zero it */
769 zero_user(page, bnum * bsize, bh->b_size);
771 if (PageUptodate(page))
772 set_buffer_uptodate(bh);
773 if (bh_read(bh, REQ_META | REQ_PRIO) < 0)
775 gfs2_trans_add_data(ip->i_gl, bh);
777 /* If we need to write to the next block as well */
778 if (to_write > (bsize - boff)) {
779 pg_off += (bsize - boff);
780 to_write -= (bsize - boff);
781 boff = pg_off % bsize;
787 /* Write to the page, now that we have setup the buffer(s) */
788 memcpy_to_page(page, off, buf, bytes);
789 flush_dcache_page(page);
801 static int gfs2_write_disk_quota(struct gfs2_inode *ip, struct gfs2_quota *qp,
804 unsigned long pg_beg;
805 unsigned pg_off, nbytes, overflow = 0;
806 int pg_oflow = 0, error;
809 nbytes = sizeof(struct gfs2_quota);
811 pg_beg = loc >> PAGE_SHIFT;
812 pg_off = offset_in_page(loc);
814 /* If the quota straddles a page boundary, split the write in two */
815 if ((pg_off + nbytes) > PAGE_SIZE) {
817 overflow = (pg_off + nbytes) - PAGE_SIZE;
821 error = gfs2_write_buf_to_page(ip, pg_beg, pg_off, ptr,
823 /* If there's an overflow, write the remaining bytes to the next page */
824 if (!error && pg_oflow)
825 error = gfs2_write_buf_to_page(ip, pg_beg + 1, 0,
826 ptr + nbytes - overflow,
832 * gfs2_adjust_quota - adjust record of current block usage
833 * @ip: The quota inode
834 * @loc: Offset of the entry in the quota file
835 * @change: The amount of usage change to record
836 * @qd: The quota data
837 * @fdq: The updated limits to record
839 * This function was mostly borrowed from gfs2_block_truncate_page which was
840 * in turn mostly borrowed from ext3
842 * Returns: 0 or -ve on error
845 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
846 s64 change, struct gfs2_quota_data *qd,
847 struct qc_dqblk *fdq)
849 struct inode *inode = &ip->i_inode;
850 struct gfs2_sbd *sdp = GFS2_SB(inode);
855 if (gfs2_is_stuffed(ip)) {
856 err = gfs2_unstuff_dinode(ip);
861 memset(&q, 0, sizeof(struct gfs2_quota));
862 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
866 loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
868 be64_add_cpu(&q.qu_value, change);
869 if (((s64)be64_to_cpu(q.qu_value)) < 0)
870 q.qu_value = 0; /* Never go negative on quota usage */
871 qd->qd_qb.qb_value = q.qu_value;
873 if (fdq->d_fieldmask & QC_SPC_SOFT) {
874 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
875 qd->qd_qb.qb_warn = q.qu_warn;
877 if (fdq->d_fieldmask & QC_SPC_HARD) {
878 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
879 qd->qd_qb.qb_limit = q.qu_limit;
881 if (fdq->d_fieldmask & QC_SPACE) {
882 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
883 qd->qd_qb.qb_value = q.qu_value;
887 err = gfs2_write_disk_quota(ip, &q, loc);
889 size = loc + sizeof(struct gfs2_quota);
890 if (size > inode->i_size)
891 i_size_write(inode, size);
892 inode->i_mtime = inode->i_atime = current_time(inode);
893 mark_inode_dirty(inode);
894 set_bit(QDF_REFRESH, &qd->qd_flags);
900 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
902 struct gfs2_sbd *sdp = (*qda)->qd_sbd;
903 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
904 struct gfs2_alloc_parms ap = { .aflags = 0, };
905 unsigned int data_blocks, ind_blocks;
906 struct gfs2_holder *ghs, i_gh;
908 struct gfs2_quota_data *qd;
911 unsigned int nalloc = 0, blocks;
914 error = gfs2_qa_get(ip);
918 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
919 &data_blocks, &ind_blocks);
921 ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
927 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
928 inode_lock(&ip->i_inode);
929 for (qx = 0; qx < num_qd; qx++) {
930 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
931 GL_NOCACHE, &ghs[qx]);
936 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
940 for (x = 0; x < num_qd; x++) {
941 offset = qd2offset(qda[x]);
942 if (gfs2_write_alloc_required(ip, offset,
943 sizeof(struct gfs2_quota)))
948 * 1 blk for unstuffing inode if stuffed. We add this extra
949 * block to the reservation unconditionally. If the inode
950 * doesn't need unstuffing, the block will be released to the
951 * rgrp since it won't be allocated during the transaction
953 /* +3 in the end for unstuffing block, inode size update block
954 * and another block in case quota straddles page boundary and
955 * two blocks need to be updated instead of 1 */
956 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
958 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
959 ap.target = reserved;
960 error = gfs2_inplace_reserve(ip, &ap);
965 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
967 error = gfs2_trans_begin(sdp, blocks, 0);
971 for (x = 0; x < num_qd; x++) {
973 offset = qd2offset(qd);
974 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
978 do_qc(qd, -qd->qd_change_sync, QC_SYNC);
979 set_bit(QDF_REFRESH, &qd->qd_flags);
987 gfs2_inplace_release(ip);
989 gfs2_glock_dq_uninit(&i_gh);
992 gfs2_glock_dq_uninit(&ghs[qx]);
993 inode_unlock(&ip->i_inode);
995 gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
996 GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
1002 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
1004 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1005 struct gfs2_quota q;
1006 struct gfs2_quota_lvb *qlvb;
1010 memset(&q, 0, sizeof(struct gfs2_quota));
1011 pos = qd2offset(qd);
1012 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
1016 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1017 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
1019 qlvb->qb_limit = q.qu_limit;
1020 qlvb->qb_warn = q.qu_warn;
1021 qlvb->qb_value = q.qu_value;
1027 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
1028 struct gfs2_holder *q_gh)
1030 struct gfs2_sbd *sdp = qd->qd_sbd;
1031 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1032 struct gfs2_holder i_gh;
1035 gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd);
1037 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
1041 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1042 force_refresh = FORCE;
1044 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1046 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
1047 gfs2_glock_dq_uninit(q_gh);
1048 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1053 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1057 error = update_qd(sdp, qd);
1061 gfs2_glock_dq_uninit(&i_gh);
1062 gfs2_glock_dq_uninit(q_gh);
1070 gfs2_glock_dq_uninit(&i_gh);
1072 gfs2_glock_dq_uninit(q_gh);
1076 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
1078 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1079 struct gfs2_quota_data *qd;
1083 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON &&
1084 sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET)
1087 error = gfs2_quota_hold(ip, uid, gid);
1091 sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
1092 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
1094 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1095 qd = ip->i_qadata->qa_qd[x];
1096 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
1102 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1105 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1106 gfs2_quota_unhold(ip);
1112 static int need_sync(struct gfs2_quota_data *qd)
1114 struct gfs2_sbd *sdp = qd->qd_sbd;
1115 struct gfs2_tune *gt = &sdp->sd_tune;
1117 unsigned int num, den;
1120 if (!qd->qd_qb.qb_limit)
1123 spin_lock(&qd_lock);
1124 value = qd->qd_change;
1125 spin_unlock(&qd_lock);
1127 spin_lock(>->gt_spin);
1128 num = gt->gt_quota_scale_num;
1129 den = gt->gt_quota_scale_den;
1130 spin_unlock(>->gt_spin);
1134 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1135 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1138 value *= gfs2_jindex_size(sdp) * num;
1139 value = div_s64(value, den);
1140 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
1141 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1148 void gfs2_quota_unlock(struct gfs2_inode *ip)
1150 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1151 struct gfs2_quota_data *qda[4];
1152 unsigned int count = 0;
1156 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1159 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1160 struct gfs2_quota_data *qd;
1163 qd = ip->i_qadata->qa_qd[x];
1164 sync = need_sync(qd);
1166 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1170 spin_lock(&qd_lock);
1171 found = qd_check_sync(sdp, qd, NULL);
1172 spin_unlock(&qd_lock);
1177 gfs2_assert_warn(sdp, qd->qd_change_sync);
1179 clear_bit(QDF_LOCKED, &qd->qd_flags);
1189 do_sync(count, qda);
1190 for (x = 0; x < count; x++)
1194 gfs2_quota_unhold(ip);
1197 #define MAX_LINE 256
1199 static int print_message(struct gfs2_quota_data *qd, char *type)
1201 struct gfs2_sbd *sdp = qd->qd_sbd;
1203 if (sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET)
1204 fs_info(sdp, "quota %s for %s %u\n",
1206 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1207 from_kqid(&init_user_ns, qd->qd_id));
1213 * gfs2_quota_check - check if allocating new blocks will exceed quota
1214 * @ip: The inode for which this check is being performed
1215 * @uid: The uid to check against
1216 * @gid: The gid to check against
1217 * @ap: The allocation parameters. ap->target contains the requested
1218 * blocks. ap->min_target, if set, contains the minimum blks
1221 * Returns: 0 on success.
1222 * min_req = ap->min_target ? ap->min_target : ap->target;
1223 * quota must allow at least min_req blks for success and
1224 * ap->allowed is set to the number of blocks allowed
1226 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1227 * of blocks available.
1229 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1230 struct gfs2_alloc_parms *ap)
1232 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1233 struct gfs2_quota_data *qd;
1234 s64 value, warn, limit;
1238 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1239 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1242 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1243 qd = ip->i_qadata->qa_qd[x];
1245 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1246 qid_eq(qd->qd_id, make_kqid_gid(gid))))
1249 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1250 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1251 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1252 spin_lock(&qd_lock);
1253 value += qd->qd_change;
1254 spin_unlock(&qd_lock);
1256 if (limit > 0 && (limit - value) < ap->allowed)
1257 ap->allowed = limit - value;
1258 /* If we can't meet the target */
1259 if (limit && limit < (value + (s64)ap->target)) {
1260 /* If no min_target specified or we don't meet
1261 * min_target, return -EDQUOT */
1262 if (!ap->min_target || ap->min_target > ap->allowed) {
1263 if (!test_and_set_bit(QDF_QMSG_QUIET,
1265 print_message(qd, "exceeded");
1266 quota_send_warning(qd->qd_id,
1268 QUOTA_NL_BHARDWARN);
1273 } else if (warn && warn < value &&
1274 time_after_eq(jiffies, qd->qd_last_warn +
1275 gfs2_tune_get(sdp, gt_quota_warn_period)
1277 quota_send_warning(qd->qd_id,
1278 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1279 error = print_message(qd, "warning");
1280 qd->qd_last_warn = jiffies;
1286 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1287 kuid_t uid, kgid_t gid)
1289 struct gfs2_quota_data *qd;
1291 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1293 if ((sdp->sd_args.ar_quota != GFS2_QUOTA_ON &&
1294 sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) ||
1295 gfs2_assert_warn(sdp, change))
1297 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1300 if (gfs2_assert_withdraw(sdp, ip->i_qadata &&
1301 ip->i_qadata->qa_ref > 0))
1303 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1304 qd = ip->i_qadata->qa_qd[x];
1306 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1307 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1308 do_qc(qd, change, QC_CHANGE);
1313 int gfs2_quota_sync(struct super_block *sb, int type)
1315 struct gfs2_sbd *sdp = sb->s_fs_info;
1316 struct gfs2_quota_data **qda;
1317 unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder);
1318 unsigned int num_qd;
1322 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1326 mutex_lock(&sdp->sd_quota_sync_mutex);
1327 sdp->sd_quota_sync_gen++;
1333 error = qd_fish(sdp, qda + num_qd);
1334 if (error || !qda[num_qd])
1336 if (++num_qd == max_qd)
1342 error = do_sync(num_qd, qda);
1344 for (x = 0; x < num_qd; x++)
1345 qda[x]->qd_sync_gen =
1346 sdp->sd_quota_sync_gen;
1348 for (x = 0; x < num_qd; x++)
1351 } while (!error && num_qd == max_qd);
1353 mutex_unlock(&sdp->sd_quota_sync_mutex);
1359 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1361 struct gfs2_quota_data *qd;
1362 struct gfs2_holder q_gh;
1365 error = qd_get(sdp, qid, &qd);
1369 error = do_glock(qd, FORCE, &q_gh);
1371 gfs2_glock_dq_uninit(&q_gh);
1377 int gfs2_quota_init(struct gfs2_sbd *sdp)
1379 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1380 u64 size = i_size_read(sdp->sd_qc_inode);
1381 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1382 unsigned int x, slot = 0;
1383 unsigned int found = 0;
1385 unsigned int bm_size;
1390 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1393 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1394 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1395 bm_size *= sizeof(unsigned long);
1397 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1398 if (sdp->sd_quota_bitmap == NULL)
1399 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1401 if (!sdp->sd_quota_bitmap)
1404 for (x = 0; x < blocks; x++) {
1405 struct buffer_head *bh;
1406 const struct gfs2_quota_change *qc;
1411 error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen);
1416 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1419 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1424 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1425 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1427 struct gfs2_quota_data *qd;
1428 s64 qc_change = be64_to_cpu(qc->qc_change);
1429 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1430 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1431 USRQUOTA : GRPQUOTA;
1432 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1433 be32_to_cpu(qc->qc_id));
1438 hash = gfs2_qd_hash(sdp, qc_id);
1439 qd = qd_alloc(hash, sdp, qc_id);
1445 set_bit(QDF_CHANGE, &qd->qd_flags);
1446 qd->qd_change = qc_change;
1448 qd->qd_slot_count = 1;
1450 spin_lock(&qd_lock);
1451 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1452 list_add(&qd->qd_list, &sdp->sd_quota_list);
1453 atomic_inc(&sdp->sd_quota_count);
1454 spin_unlock(&qd_lock);
1456 spin_lock_bucket(hash);
1457 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1458 spin_unlock_bucket(hash);
1469 fs_info(sdp, "found %u quota changes\n", found);
1474 gfs2_quota_cleanup(sdp);
1478 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1480 struct gfs2_quota_data *qd;
1484 BUG_ON(test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags));
1486 spin_lock(&qd_lock);
1487 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1488 spin_lock(&qd->qd_lockref.lock);
1489 if (qd->qd_lockref.count != 0) {
1490 spin_unlock(&qd->qd_lockref.lock);
1493 lockref_mark_dead(&qd->qd_lockref);
1494 spin_unlock(&qd->qd_lockref.lock);
1496 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
1497 list_add(&qd->qd_lru, &dispose);
1499 spin_unlock(&qd_lock);
1501 gfs2_qd_list_dispose(&dispose);
1503 wait_event_timeout(sdp->sd_kill_wait,
1504 (count = atomic_read(&sdp->sd_quota_count)) == 0,
1508 fs_err(sdp, "%d left-over quota data objects\n", count);
1510 kvfree(sdp->sd_quota_bitmap);
1511 sdp->sd_quota_bitmap = NULL;
1514 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1516 if (error == 0 || error == -EROFS)
1518 if (!gfs2_withdrawn(sdp)) {
1519 if (!cmpxchg(&sdp->sd_log_error, 0, error))
1520 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1521 wake_up(&sdp->sd_logd_waitq);
1525 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1526 int (*fxn)(struct super_block *sb, int type),
1527 unsigned long t, unsigned long *timeo,
1528 unsigned int *new_timeo)
1531 int error = fxn(sdp->sd_vfs, 0);
1532 quotad_error(sdp, msg, error);
1533 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1539 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1540 if (!sdp->sd_statfs_force_sync) {
1541 sdp->sd_statfs_force_sync = 1;
1542 wake_up(&sdp->sd_quota_wait);
1548 * gfs2_quotad - Write cached quota changes into the quota file
1549 * @data: Pointer to GFS2 superblock
1553 int gfs2_quotad(void *data)
1555 struct gfs2_sbd *sdp = data;
1556 struct gfs2_tune *tune = &sdp->sd_tune;
1557 unsigned long statfs_timeo = 0;
1558 unsigned long quotad_timeo = 0;
1559 unsigned long t = 0;
1561 while (!kthread_should_stop()) {
1562 if (gfs2_withdrawn(sdp))
1565 /* Update the master statfs file */
1566 if (sdp->sd_statfs_force_sync) {
1567 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1568 quotad_error(sdp, "statfs", error);
1569 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1572 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1574 &tune->gt_statfs_quantum);
1576 /* Update quota file */
1577 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1578 "ad_timeo, &tune->gt_quota_quantum);
1582 t = min(quotad_timeo, statfs_timeo);
1584 t = wait_event_interruptible_timeout(sdp->sd_quota_wait,
1585 sdp->sd_statfs_force_sync ||
1586 gfs2_withdrawn(sdp) ||
1587 kthread_should_stop(),
1590 if (sdp->sd_statfs_force_sync)
1597 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1599 struct gfs2_sbd *sdp = sb->s_fs_info;
1601 memset(state, 0, sizeof(*state));
1603 switch (sdp->sd_args.ar_quota) {
1604 case GFS2_QUOTA_QUIET:
1607 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1608 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1610 case GFS2_QUOTA_ACCOUNT:
1611 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1613 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1616 case GFS2_QUOTA_OFF:
1619 if (sdp->sd_quota_inode) {
1620 state->s_state[USRQUOTA].ino =
1621 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1622 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1624 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1625 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1626 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1630 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1631 struct qc_dqblk *fdq)
1633 struct gfs2_sbd *sdp = sb->s_fs_info;
1634 struct gfs2_quota_lvb *qlvb;
1635 struct gfs2_quota_data *qd;
1636 struct gfs2_holder q_gh;
1639 memset(fdq, 0, sizeof(*fdq));
1641 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1642 return -ESRCH; /* Crazy XFS error code */
1644 if ((qid.type != USRQUOTA) &&
1645 (qid.type != GRPQUOTA))
1648 error = qd_get(sdp, qid, &qd);
1651 error = do_glock(qd, FORCE, &q_gh);
1655 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1656 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1657 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1658 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1660 gfs2_glock_dq_uninit(&q_gh);
1666 /* GFS2 only supports a subset of the XFS fields */
1667 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1669 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1670 struct qc_dqblk *fdq)
1672 struct gfs2_sbd *sdp = sb->s_fs_info;
1673 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1674 struct gfs2_quota_data *qd;
1675 struct gfs2_holder q_gh, i_gh;
1676 unsigned int data_blocks, ind_blocks;
1677 unsigned int blocks = 0;
1682 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1683 return -ESRCH; /* Crazy XFS error code */
1685 if ((qid.type != USRQUOTA) &&
1686 (qid.type != GRPQUOTA))
1689 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1692 error = qd_get(sdp, qid, &qd);
1696 error = gfs2_qa_get(ip);
1700 inode_lock(&ip->i_inode);
1701 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1704 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1708 /* Check for existing entry, if none then alloc new blocks */
1709 error = update_qd(sdp, qd);
1713 /* If nothing has changed, this is a no-op */
1714 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1715 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1716 fdq->d_fieldmask ^= QC_SPC_SOFT;
1718 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1719 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1720 fdq->d_fieldmask ^= QC_SPC_HARD;
1722 if ((fdq->d_fieldmask & QC_SPACE) &&
1723 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1724 fdq->d_fieldmask ^= QC_SPACE;
1726 if (fdq->d_fieldmask == 0)
1729 offset = qd2offset(qd);
1730 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1731 if (gfs2_is_stuffed(ip))
1733 if (alloc_required) {
1734 struct gfs2_alloc_parms ap = { .aflags = 0, };
1735 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1736 &data_blocks, &ind_blocks);
1737 blocks = 1 + data_blocks + ind_blocks;
1739 error = gfs2_inplace_reserve(ip, &ap);
1742 blocks += gfs2_rg_blocks(ip, blocks);
1745 /* Some quotas span block boundaries and can update two blocks,
1746 adding an extra block to the transaction to handle such quotas */
1747 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1752 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1754 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
1756 gfs2_trans_end(sdp);
1759 gfs2_inplace_release(ip);
1761 gfs2_glock_dq_uninit(&i_gh);
1763 gfs2_glock_dq_uninit(&q_gh);
1766 inode_unlock(&ip->i_inode);
1772 const struct quotactl_ops gfs2_quotactl_ops = {
1773 .quota_sync = gfs2_quota_sync,
1774 .get_state = gfs2_quota_get_state,
1775 .get_dqblk = gfs2_get_dqblk,
1776 .set_dqblk = gfs2_set_dqblk,
1779 void __init gfs2_quota_hash_init(void)
1783 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1784 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);