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 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)
216 return qd2index(qd) * sizeof(struct gfs2_quota);
219 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
221 struct gfs2_quota_data *qd;
224 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
229 qd->qd_lockref.count = 0;
230 spin_lock_init(&qd->qd_lockref.lock);
233 INIT_LIST_HEAD(&qd->qd_lru);
236 error = gfs2_glock_get(sdp, qd2index(qd),
237 &gfs2_quota_glops, CREATE, &qd->qd_gl);
244 kmem_cache_free(gfs2_quotad_cachep, qd);
248 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
249 const struct gfs2_sbd *sdp,
252 struct gfs2_quota_data *qd;
253 struct hlist_bl_node *h;
255 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
256 if (!qid_eq(qd->qd_id, qid))
258 if (qd->qd_sbd != sdp)
260 if (lockref_get_not_dead(&qd->qd_lockref)) {
261 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
270 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
271 struct gfs2_quota_data **qdp)
273 struct gfs2_quota_data *qd, *new_qd;
274 unsigned int hash = gfs2_qd_hash(sdp, qid);
277 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
283 new_qd = qd_alloc(hash, sdp, qid);
288 spin_lock_bucket(hash);
289 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
291 new_qd->qd_lockref.count++;
293 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
294 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
295 atomic_inc(&sdp->sd_quota_count);
297 spin_unlock_bucket(hash);
298 spin_unlock(&qd_lock);
301 gfs2_glock_put(new_qd->qd_gl);
302 kmem_cache_free(gfs2_quotad_cachep, new_qd);
309 static void qd_hold(struct gfs2_quota_data *qd)
311 struct gfs2_sbd *sdp = qd->qd_sbd;
312 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
313 lockref_get(&qd->qd_lockref);
316 static void qd_put(struct gfs2_quota_data *qd)
318 struct gfs2_sbd *sdp;
320 if (lockref_put_or_lock(&qd->qd_lockref))
323 BUG_ON(__lockref_is_dead(&qd->qd_lockref));
325 if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) {
326 lockref_mark_dead(&qd->qd_lockref);
327 spin_unlock(&qd->qd_lockref.lock);
333 qd->qd_lockref.count = 0;
334 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
335 spin_unlock(&qd->qd_lockref.lock);
338 static int slot_get(struct gfs2_quota_data *qd)
340 struct gfs2_sbd *sdp = qd->qd_sbd;
344 spin_lock(&sdp->sd_bitmap_lock);
345 if (qd->qd_slot_ref == 0) {
346 bit = find_first_zero_bit(sdp->sd_quota_bitmap,
347 sdp->sd_quota_slots);
348 if (bit >= sdp->sd_quota_slots) {
352 set_bit(bit, sdp->sd_quota_bitmap);
357 spin_unlock(&sdp->sd_bitmap_lock);
361 static void slot_hold(struct gfs2_quota_data *qd)
363 struct gfs2_sbd *sdp = qd->qd_sbd;
365 spin_lock(&sdp->sd_bitmap_lock);
366 gfs2_assert(sdp, qd->qd_slot_ref);
368 spin_unlock(&sdp->sd_bitmap_lock);
371 static void slot_put(struct gfs2_quota_data *qd)
373 struct gfs2_sbd *sdp = qd->qd_sbd;
375 spin_lock(&sdp->sd_bitmap_lock);
376 gfs2_assert(sdp, qd->qd_slot_ref);
377 if (!--qd->qd_slot_ref) {
378 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
381 spin_unlock(&sdp->sd_bitmap_lock);
384 static int bh_get(struct gfs2_quota_data *qd)
386 struct gfs2_sbd *sdp = qd->qd_sbd;
387 struct inode *inode = sdp->sd_qc_inode;
388 struct gfs2_inode *ip = GFS2_I(inode);
389 unsigned int block, offset;
390 struct buffer_head *bh;
391 struct iomap iomap = { };
394 mutex_lock(&sdp->sd_quota_mutex);
396 if (qd->qd_bh_count++) {
397 mutex_unlock(&sdp->sd_quota_mutex);
401 block = qd->qd_slot / sdp->sd_qc_per_block;
402 offset = qd->qd_slot % sdp->sd_qc_per_block;
404 error = gfs2_iomap_get(inode,
405 (loff_t)block << inode->i_blkbits,
406 i_blocksize(inode), &iomap);
410 if (iomap.type != IOMAP_MAPPED)
413 error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits,
418 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
422 qd->qd_bh_qc = (struct gfs2_quota_change *)
423 (bh->b_data + sizeof(struct gfs2_meta_header) +
424 offset * sizeof(struct gfs2_quota_change));
426 mutex_unlock(&sdp->sd_quota_mutex);
434 mutex_unlock(&sdp->sd_quota_mutex);
438 static void bh_put(struct gfs2_quota_data *qd)
440 struct gfs2_sbd *sdp = qd->qd_sbd;
442 mutex_lock(&sdp->sd_quota_mutex);
443 gfs2_assert(sdp, qd->qd_bh_count);
444 if (!--qd->qd_bh_count) {
449 mutex_unlock(&sdp->sd_quota_mutex);
452 static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
455 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
456 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
457 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
461 * If qd_change is 0 it means a pending quota change was negated.
462 * We should not sync it, but we still have a qd reference and slot
463 * reference taken by gfs2_quota_change -> do_qc that need to be put.
465 if (!qd->qd_change && test_and_clear_bit(QDF_CHANGE, &qd->qd_flags)) {
471 if (!lockref_get_not_dead(&qd->qd_lockref))
474 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
475 set_bit(QDF_LOCKED, &qd->qd_flags);
476 qd->qd_change_sync = qd->qd_change;
481 static int qd_bh_get_or_undo(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
489 clear_bit(QDF_LOCKED, &qd->qd_flags);
495 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
497 struct gfs2_quota_data *qd = NULL, *iter;
502 if (sb_rdonly(sdp->sd_vfs))
507 list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) {
508 if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) {
514 spin_unlock(&qd_lock);
517 error = qd_bh_get_or_undo(sdp, qd);
526 static void qdsb_put(struct gfs2_quota_data *qd)
533 static void qd_unlock(struct gfs2_quota_data *qd)
535 gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags));
536 clear_bit(QDF_LOCKED, &qd->qd_flags);
540 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
541 struct gfs2_quota_data **qdp)
545 error = qd_get(sdp, qid, qdp);
549 error = slot_get(*qdp);
553 error = bh_get(*qdp);
567 * gfs2_qa_get - make sure we have a quota allocations data structure,
569 * @ip: the inode for this reservation
571 int gfs2_qa_get(struct gfs2_inode *ip)
573 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
574 struct inode *inode = &ip->i_inode;
576 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
579 spin_lock(&inode->i_lock);
580 if (ip->i_qadata == NULL) {
581 struct gfs2_qadata *tmp;
583 spin_unlock(&inode->i_lock);
584 tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
588 spin_lock(&inode->i_lock);
589 if (ip->i_qadata == NULL)
592 kmem_cache_free(gfs2_qadata_cachep, tmp);
594 ip->i_qadata->qa_ref++;
595 spin_unlock(&inode->i_lock);
599 void gfs2_qa_put(struct gfs2_inode *ip)
601 struct inode *inode = &ip->i_inode;
603 spin_lock(&inode->i_lock);
604 if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
605 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
608 spin_unlock(&inode->i_lock);
611 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
613 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
614 struct gfs2_quota_data **qd;
617 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
620 error = gfs2_qa_get(ip);
624 qd = ip->i_qadata->qa_qd;
626 if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
627 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
633 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
636 ip->i_qadata->qa_qd_num++;
639 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
642 ip->i_qadata->qa_qd_num++;
645 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
646 !uid_eq(uid, ip->i_inode.i_uid)) {
647 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
650 ip->i_qadata->qa_qd_num++;
654 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
655 !gid_eq(gid, ip->i_inode.i_gid)) {
656 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
659 ip->i_qadata->qa_qd_num++;
665 gfs2_quota_unhold(ip);
670 void gfs2_quota_unhold(struct gfs2_inode *ip)
672 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
675 if (ip->i_qadata == NULL)
678 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
680 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
681 qdsb_put(ip->i_qadata->qa_qd[x]);
682 ip->i_qadata->qa_qd[x] = NULL;
684 ip->i_qadata->qa_qd_num = 0;
688 static int sort_qd(const void *a, const void *b)
690 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
691 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
693 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
695 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
700 static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type)
702 struct gfs2_sbd *sdp = qd->qd_sbd;
703 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
704 struct gfs2_quota_change *qc = qd->qd_bh_qc;
707 mutex_lock(&sdp->sd_quota_mutex);
708 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
710 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
713 if (qd->qd_id.type == USRQUOTA)
714 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
715 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
718 x = be64_to_cpu(qc->qc_change) + change;
719 qc->qc_change = cpu_to_be64(x);
723 spin_unlock(&qd_lock);
725 if (qc_type == QC_CHANGE) {
726 if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
731 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
732 clear_bit(QDF_CHANGE, &qd->qd_flags);
739 if (change < 0) /* Reset quiet flag if we freed some blocks */
740 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
741 mutex_unlock(&sdp->sd_quota_mutex);
744 static int gfs2_write_buf_to_page(struct gfs2_sbd *sdp, unsigned long index,
745 unsigned off, void *buf, unsigned bytes)
747 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
748 struct inode *inode = &ip->i_inode;
749 struct address_space *mapping = inode->i_mapping;
751 struct buffer_head *bh;
753 unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
754 unsigned to_write = bytes, pg_off = off;
756 blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
759 page = grab_cache_page(mapping, index);
762 if (!page_has_buffers(page))
763 create_empty_buffers(page, bsize, 0);
765 bh = page_buffers(page);
767 /* Find the beginning block within the page */
768 if (pg_off >= ((bnum * bsize) + bsize)) {
769 bh = bh->b_this_page;
774 if (!buffer_mapped(bh)) {
775 gfs2_block_map(inode, blk, bh, 1);
776 if (!buffer_mapped(bh))
778 /* If it's a newly allocated disk block, zero it */
780 zero_user(page, bnum * bsize, bh->b_size);
782 if (PageUptodate(page))
783 set_buffer_uptodate(bh);
784 if (bh_read(bh, REQ_META | REQ_PRIO) < 0)
786 gfs2_trans_add_data(ip->i_gl, bh);
788 /* If we need to write to the next block as well */
789 if (to_write > (bsize - boff)) {
790 pg_off += (bsize - boff);
791 to_write -= (bsize - boff);
792 boff = pg_off % bsize;
798 /* Write to the page, now that we have setup the buffer(s) */
799 memcpy_to_page(page, off, buf, bytes);
800 flush_dcache_page(page);
812 static int gfs2_write_disk_quota(struct gfs2_sbd *sdp, struct gfs2_quota *qp,
815 unsigned long pg_beg;
816 unsigned pg_off, nbytes, overflow = 0;
820 nbytes = sizeof(struct gfs2_quota);
822 pg_beg = loc >> PAGE_SHIFT;
823 pg_off = offset_in_page(loc);
825 /* If the quota straddles a page boundary, split the write in two */
826 if ((pg_off + nbytes) > PAGE_SIZE)
827 overflow = (pg_off + nbytes) - PAGE_SIZE;
830 error = gfs2_write_buf_to_page(sdp, pg_beg, pg_off, ptr,
832 /* If there's an overflow, write the remaining bytes to the next page */
833 if (!error && overflow)
834 error = gfs2_write_buf_to_page(sdp, pg_beg + 1, 0,
835 ptr + nbytes - overflow,
841 * gfs2_adjust_quota - adjust record of current block usage
842 * @sdp: The superblock
843 * @loc: Offset of the entry in the quota file
844 * @change: The amount of usage change to record
845 * @qd: The quota data
846 * @fdq: The updated limits to record
848 * This function was mostly borrowed from gfs2_block_truncate_page which was
849 * in turn mostly borrowed from ext3
851 * Returns: 0 or -ve on error
854 static int gfs2_adjust_quota(struct gfs2_sbd *sdp, loff_t loc,
855 s64 change, struct gfs2_quota_data *qd,
856 struct qc_dqblk *fdq)
858 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
859 struct inode *inode = &ip->i_inode;
864 if (gfs2_is_stuffed(ip)) {
865 err = gfs2_unstuff_dinode(ip);
870 memset(&q, 0, sizeof(struct gfs2_quota));
871 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
875 loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
876 be64_add_cpu(&q.qu_value, change);
877 if (((s64)be64_to_cpu(q.qu_value)) < 0)
878 q.qu_value = 0; /* Never go negative on quota usage */
879 qd->qd_qb.qb_value = q.qu_value;
881 if (fdq->d_fieldmask & QC_SPC_SOFT) {
882 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
883 qd->qd_qb.qb_warn = q.qu_warn;
885 if (fdq->d_fieldmask & QC_SPC_HARD) {
886 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
887 qd->qd_qb.qb_limit = q.qu_limit;
889 if (fdq->d_fieldmask & QC_SPACE) {
890 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
891 qd->qd_qb.qb_value = q.qu_value;
895 err = gfs2_write_disk_quota(sdp, &q, loc);
897 size = loc + sizeof(struct gfs2_quota);
898 if (size > inode->i_size)
899 i_size_write(inode, size);
900 inode->i_mtime = inode_set_ctime_current(inode);
901 mark_inode_dirty(inode);
902 set_bit(QDF_REFRESH, &qd->qd_flags);
908 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
910 struct gfs2_sbd *sdp = (*qda)->qd_sbd;
911 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
912 struct gfs2_alloc_parms ap = { .aflags = 0, };
913 unsigned int data_blocks, ind_blocks;
914 struct gfs2_holder *ghs, i_gh;
916 struct gfs2_quota_data *qd;
919 unsigned int nalloc = 0, blocks;
922 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
923 &data_blocks, &ind_blocks);
925 ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
929 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
930 inode_lock(&ip->i_inode);
931 for (qx = 0; qx < num_qd; qx++) {
932 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
933 GL_NOCACHE, &ghs[qx]);
938 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
942 for (x = 0; x < num_qd; x++) {
943 offset = qd2offset(qda[x]);
944 if (gfs2_write_alloc_required(ip, offset,
945 sizeof(struct gfs2_quota)))
950 * 1 blk for unstuffing inode if stuffed. We add this extra
951 * block to the reservation unconditionally. If the inode
952 * doesn't need unstuffing, the block will be released to the
953 * rgrp since it won't be allocated during the transaction
955 /* +3 in the end for unstuffing block, inode size update block
956 * and another block in case quota straddles page boundary and
957 * two blocks need to be updated instead of 1 */
958 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
960 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
961 ap.target = reserved;
962 error = gfs2_inplace_reserve(ip, &ap);
967 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
969 error = gfs2_trans_begin(sdp, blocks, 0);
973 for (x = 0; x < num_qd; x++) {
975 offset = qd2offset(qd);
976 error = gfs2_adjust_quota(sdp, offset, qd->qd_change_sync, qd,
981 do_qc(qd, -qd->qd_change_sync, QC_SYNC);
982 set_bit(QDF_REFRESH, &qd->qd_flags);
988 gfs2_inplace_release(ip);
990 gfs2_glock_dq_uninit(&i_gh);
993 gfs2_glock_dq_uninit(&ghs[qx]);
994 inode_unlock(&ip->i_inode);
996 gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
997 GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
999 for (x = 0; x < num_qd; x++)
1000 qda[x]->qd_sync_gen = sdp->sd_quota_sync_gen;
1005 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
1007 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1008 struct gfs2_quota q;
1009 struct gfs2_quota_lvb *qlvb;
1013 memset(&q, 0, sizeof(struct gfs2_quota));
1014 pos = qd2offset(qd);
1015 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
1019 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1020 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
1022 qlvb->qb_limit = q.qu_limit;
1023 qlvb->qb_warn = q.qu_warn;
1024 qlvb->qb_value = q.qu_value;
1030 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
1031 struct gfs2_holder *q_gh)
1033 struct gfs2_sbd *sdp = qd->qd_sbd;
1034 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1035 struct gfs2_holder i_gh;
1038 gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd);
1040 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
1044 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1045 force_refresh = FORCE;
1047 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1049 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
1050 gfs2_glock_dq_uninit(q_gh);
1051 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1056 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1060 error = update_qd(sdp, qd);
1064 gfs2_glock_dq_uninit(&i_gh);
1065 gfs2_glock_dq_uninit(q_gh);
1073 gfs2_glock_dq_uninit(&i_gh);
1075 gfs2_glock_dq_uninit(q_gh);
1079 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
1081 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1082 struct gfs2_quota_data *qd;
1086 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON &&
1087 sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET)
1090 error = gfs2_quota_hold(ip, uid, gid);
1094 sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
1095 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
1097 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1098 qd = ip->i_qadata->qa_qd[x];
1099 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
1105 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1108 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1109 gfs2_quota_unhold(ip);
1115 static bool need_sync(struct gfs2_quota_data *qd)
1117 struct gfs2_sbd *sdp = qd->qd_sbd;
1118 struct gfs2_tune *gt = &sdp->sd_tune;
1120 unsigned int num, den;
1122 if (!qd->qd_qb.qb_limit)
1125 spin_lock(&qd_lock);
1126 value = qd->qd_change;
1127 spin_unlock(&qd_lock);
1129 spin_lock(>->gt_spin);
1130 num = gt->gt_quota_scale_num;
1131 den = gt->gt_quota_scale_den;
1132 spin_unlock(>->gt_spin);
1136 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1137 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1140 value *= gfs2_jindex_size(sdp) * num;
1141 value = div_s64(value, den);
1142 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
1143 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1150 void gfs2_quota_unlock(struct gfs2_inode *ip)
1152 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1153 struct gfs2_quota_data *qda[2 * GFS2_MAXQUOTAS];
1154 unsigned int count = 0;
1158 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1161 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1162 struct gfs2_quota_data *qd;
1165 qd = ip->i_qadata->qa_qd[x];
1166 sync = need_sync(qd);
1168 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1172 spin_lock(&qd_lock);
1173 found = qd_check_sync(sdp, qd, NULL);
1174 spin_unlock(&qd_lock);
1179 if (!qd_bh_get_or_undo(sdp, qd))
1184 do_sync(count, qda);
1185 for (x = 0; x < count; x++)
1189 gfs2_quota_unhold(ip);
1192 #define MAX_LINE 256
1194 static int print_message(struct gfs2_quota_data *qd, char *type)
1196 struct gfs2_sbd *sdp = qd->qd_sbd;
1198 if (sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET)
1199 fs_info(sdp, "quota %s for %s %u\n",
1201 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1202 from_kqid(&init_user_ns, qd->qd_id));
1208 * gfs2_quota_check - check if allocating new blocks will exceed quota
1209 * @ip: The inode for which this check is being performed
1210 * @uid: The uid to check against
1211 * @gid: The gid to check against
1212 * @ap: The allocation parameters. ap->target contains the requested
1213 * blocks. ap->min_target, if set, contains the minimum blks
1216 * Returns: 0 on success.
1217 * min_req = ap->min_target ? ap->min_target : ap->target;
1218 * quota must allow at least min_req blks for success and
1219 * ap->allowed is set to the number of blocks allowed
1221 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1222 * of blocks available.
1224 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1225 struct gfs2_alloc_parms *ap)
1227 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1228 struct gfs2_quota_data *qd;
1229 s64 value, warn, limit;
1233 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1234 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1237 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1238 qd = ip->i_qadata->qa_qd[x];
1240 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1241 qid_eq(qd->qd_id, make_kqid_gid(gid))))
1244 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1245 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1246 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1247 spin_lock(&qd_lock);
1248 value += qd->qd_change;
1249 spin_unlock(&qd_lock);
1251 if (limit > 0 && (limit - value) < ap->allowed)
1252 ap->allowed = limit - value;
1253 /* If we can't meet the target */
1254 if (limit && limit < (value + (s64)ap->target)) {
1255 /* If no min_target specified or we don't meet
1256 * min_target, return -EDQUOT */
1257 if (!ap->min_target || ap->min_target > ap->allowed) {
1258 if (!test_and_set_bit(QDF_QMSG_QUIET,
1260 print_message(qd, "exceeded");
1261 quota_send_warning(qd->qd_id,
1263 QUOTA_NL_BHARDWARN);
1268 } else if (warn && warn < value &&
1269 time_after_eq(jiffies, qd->qd_last_warn +
1270 gfs2_tune_get(sdp, gt_quota_warn_period)
1272 quota_send_warning(qd->qd_id,
1273 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1274 error = print_message(qd, "warning");
1275 qd->qd_last_warn = jiffies;
1281 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1282 kuid_t uid, kgid_t gid)
1284 struct gfs2_quota_data *qd;
1286 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1288 if ((sdp->sd_args.ar_quota != GFS2_QUOTA_ON &&
1289 sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) ||
1290 gfs2_assert_warn(sdp, change))
1292 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1295 if (gfs2_assert_withdraw(sdp, ip->i_qadata &&
1296 ip->i_qadata->qa_ref > 0))
1298 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1299 qd = ip->i_qadata->qa_qd[x];
1301 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1302 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1303 do_qc(qd, change, QC_CHANGE);
1308 static bool qd_changed(struct gfs2_sbd *sdp)
1310 struct gfs2_quota_data *qd;
1311 bool changed = false;
1313 spin_lock(&qd_lock);
1314 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1315 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
1316 !test_bit(QDF_CHANGE, &qd->qd_flags))
1322 spin_unlock(&qd_lock);
1326 int gfs2_quota_sync(struct super_block *sb, int type)
1328 struct gfs2_sbd *sdp = sb->s_fs_info;
1329 struct gfs2_quota_data **qda;
1330 unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder);
1331 unsigned int num_qd;
1335 if (!qd_changed(sdp))
1338 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1342 mutex_lock(&sdp->sd_quota_sync_mutex);
1343 sdp->sd_quota_sync_gen++;
1349 error = qd_fish(sdp, qda + num_qd);
1350 if (error || !qda[num_qd])
1352 if (++num_qd == max_qd)
1358 error = do_sync(num_qd, qda);
1360 for (x = 0; x < num_qd; x++)
1363 } while (!error && num_qd == max_qd);
1365 mutex_unlock(&sdp->sd_quota_sync_mutex);
1371 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1373 struct gfs2_quota_data *qd;
1374 struct gfs2_holder q_gh;
1377 error = qd_get(sdp, qid, &qd);
1381 error = do_glock(qd, FORCE, &q_gh);
1383 gfs2_glock_dq_uninit(&q_gh);
1389 int gfs2_quota_init(struct gfs2_sbd *sdp)
1391 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1392 u64 size = i_size_read(sdp->sd_qc_inode);
1393 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1394 unsigned int x, slot = 0;
1395 unsigned int found = 0;
1397 unsigned int bm_size;
1402 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1405 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1406 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1407 bm_size *= sizeof(unsigned long);
1409 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1410 if (sdp->sd_quota_bitmap == NULL)
1411 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1413 if (!sdp->sd_quota_bitmap)
1416 for (x = 0; x < blocks; x++) {
1417 struct buffer_head *bh;
1418 const struct gfs2_quota_change *qc;
1423 error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen);
1428 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1431 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1436 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1437 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1439 struct gfs2_quota_data *qd;
1440 s64 qc_change = be64_to_cpu(qc->qc_change);
1441 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1442 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1443 USRQUOTA : GRPQUOTA;
1444 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1445 be32_to_cpu(qc->qc_id));
1450 hash = gfs2_qd_hash(sdp, qc_id);
1451 qd = qd_alloc(hash, sdp, qc_id);
1457 set_bit(QDF_CHANGE, &qd->qd_flags);
1458 qd->qd_change = qc_change;
1460 qd->qd_slot_ref = 1;
1462 spin_lock(&qd_lock);
1463 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1464 list_add(&qd->qd_list, &sdp->sd_quota_list);
1465 atomic_inc(&sdp->sd_quota_count);
1466 spin_unlock(&qd_lock);
1468 spin_lock_bucket(hash);
1469 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1470 spin_unlock_bucket(hash);
1481 fs_info(sdp, "found %u quota changes\n", found);
1486 gfs2_quota_cleanup(sdp);
1490 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1492 struct gfs2_quota_data *qd;
1496 BUG_ON(!test_bit(SDF_NORECOVERY, &sdp->sd_flags) &&
1497 test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags));
1499 spin_lock(&qd_lock);
1500 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1501 spin_lock(&qd->qd_lockref.lock);
1502 if (qd->qd_lockref.count != 0) {
1503 spin_unlock(&qd->qd_lockref.lock);
1506 lockref_mark_dead(&qd->qd_lockref);
1507 spin_unlock(&qd->qd_lockref.lock);
1509 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
1510 list_add(&qd->qd_lru, &dispose);
1512 spin_unlock(&qd_lock);
1514 gfs2_qd_list_dispose(&dispose);
1516 wait_event_timeout(sdp->sd_kill_wait,
1517 (count = atomic_read(&sdp->sd_quota_count)) == 0,
1521 fs_err(sdp, "%d left-over quota data objects\n", count);
1523 kvfree(sdp->sd_quota_bitmap);
1524 sdp->sd_quota_bitmap = NULL;
1527 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1529 if (error == 0 || error == -EROFS)
1531 if (!gfs2_withdrawn(sdp)) {
1532 if (!cmpxchg(&sdp->sd_log_error, 0, error))
1533 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1534 wake_up(&sdp->sd_logd_waitq);
1538 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1539 int (*fxn)(struct super_block *sb, int type),
1540 unsigned long t, unsigned long *timeo,
1541 unsigned int *new_timeo)
1544 int error = fxn(sdp->sd_vfs, 0);
1545 quotad_error(sdp, msg, error);
1546 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1552 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1553 if (!sdp->sd_statfs_force_sync) {
1554 sdp->sd_statfs_force_sync = 1;
1555 wake_up(&sdp->sd_quota_wait);
1561 * gfs2_quotad - Write cached quota changes into the quota file
1562 * @data: Pointer to GFS2 superblock
1566 int gfs2_quotad(void *data)
1568 struct gfs2_sbd *sdp = data;
1569 struct gfs2_tune *tune = &sdp->sd_tune;
1570 unsigned long statfs_timeo = 0;
1571 unsigned long quotad_timeo = 0;
1572 unsigned long t = 0;
1574 while (!kthread_should_stop()) {
1575 if (gfs2_withdrawn(sdp))
1578 /* Update the master statfs file */
1579 if (sdp->sd_statfs_force_sync) {
1580 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1581 quotad_error(sdp, "statfs", error);
1582 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1585 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1587 &tune->gt_statfs_quantum);
1589 /* Update quota file */
1590 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1591 "ad_timeo, &tune->gt_quota_quantum);
1595 t = min(quotad_timeo, statfs_timeo);
1597 t = wait_event_interruptible_timeout(sdp->sd_quota_wait,
1598 sdp->sd_statfs_force_sync ||
1599 gfs2_withdrawn(sdp) ||
1600 kthread_should_stop(),
1603 if (sdp->sd_statfs_force_sync)
1610 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1612 struct gfs2_sbd *sdp = sb->s_fs_info;
1614 memset(state, 0, sizeof(*state));
1616 switch (sdp->sd_args.ar_quota) {
1617 case GFS2_QUOTA_QUIET:
1620 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1621 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1623 case GFS2_QUOTA_ACCOUNT:
1624 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1626 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1629 case GFS2_QUOTA_OFF:
1632 if (sdp->sd_quota_inode) {
1633 state->s_state[USRQUOTA].ino =
1634 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1635 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1637 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1638 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1639 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1643 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1644 struct qc_dqblk *fdq)
1646 struct gfs2_sbd *sdp = sb->s_fs_info;
1647 struct gfs2_quota_lvb *qlvb;
1648 struct gfs2_quota_data *qd;
1649 struct gfs2_holder q_gh;
1652 memset(fdq, 0, sizeof(*fdq));
1654 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1655 return -ESRCH; /* Crazy XFS error code */
1657 if ((qid.type != USRQUOTA) &&
1658 (qid.type != GRPQUOTA))
1661 error = qd_get(sdp, qid, &qd);
1664 error = do_glock(qd, FORCE, &q_gh);
1668 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1669 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1670 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1671 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1673 gfs2_glock_dq_uninit(&q_gh);
1679 /* GFS2 only supports a subset of the XFS fields */
1680 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1682 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1683 struct qc_dqblk *fdq)
1685 struct gfs2_sbd *sdp = sb->s_fs_info;
1686 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1687 struct gfs2_quota_data *qd;
1688 struct gfs2_holder q_gh, i_gh;
1689 unsigned int data_blocks, ind_blocks;
1690 unsigned int blocks = 0;
1695 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1696 return -ESRCH; /* Crazy XFS error code */
1698 if ((qid.type != USRQUOTA) &&
1699 (qid.type != GRPQUOTA))
1702 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1705 error = qd_get(sdp, qid, &qd);
1709 error = gfs2_qa_get(ip);
1713 inode_lock(&ip->i_inode);
1714 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1717 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1721 /* Check for existing entry, if none then alloc new blocks */
1722 error = update_qd(sdp, qd);
1726 /* If nothing has changed, this is a no-op */
1727 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1728 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1729 fdq->d_fieldmask ^= QC_SPC_SOFT;
1731 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1732 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1733 fdq->d_fieldmask ^= QC_SPC_HARD;
1735 if ((fdq->d_fieldmask & QC_SPACE) &&
1736 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1737 fdq->d_fieldmask ^= QC_SPACE;
1739 if (fdq->d_fieldmask == 0)
1742 offset = qd2offset(qd);
1743 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1744 if (gfs2_is_stuffed(ip))
1746 if (alloc_required) {
1747 struct gfs2_alloc_parms ap = { .aflags = 0, };
1748 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1749 &data_blocks, &ind_blocks);
1750 blocks = 1 + data_blocks + ind_blocks;
1752 error = gfs2_inplace_reserve(ip, &ap);
1755 blocks += gfs2_rg_blocks(ip, blocks);
1758 /* Some quotas span block boundaries and can update two blocks,
1759 adding an extra block to the transaction to handle such quotas */
1760 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1765 error = gfs2_adjust_quota(sdp, offset, 0, qd, fdq);
1767 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
1769 gfs2_trans_end(sdp);
1772 gfs2_inplace_release(ip);
1774 gfs2_glock_dq_uninit(&i_gh);
1776 gfs2_glock_dq_uninit(&q_gh);
1779 inode_unlock(&ip->i_inode);
1785 const struct quotactl_ops gfs2_quotactl_ops = {
1786 .quota_sync = gfs2_quota_sync,
1787 .get_state = gfs2_quota_get_state,
1788 .get_dqblk = gfs2_get_dqblk,
1789 .set_dqblk = gfs2_set_dqblk,
1792 void __init gfs2_quota_hash_init(void)
1796 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1797 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);