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)
78 /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */
79 /* -> sd_bitmap_lock */
80 static DEFINE_SPINLOCK(qd_lock);
81 struct list_lru gfs2_qd_lru;
83 static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE];
85 static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp,
86 const struct kqid qid)
90 h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0);
91 h = jhash(&qid, sizeof(struct kqid), h);
93 return h & GFS2_QD_HASH_MASK;
96 static inline void spin_lock_bucket(unsigned int hash)
98 hlist_bl_lock(&qd_hash_table[hash]);
101 static inline void spin_unlock_bucket(unsigned int hash)
103 hlist_bl_unlock(&qd_hash_table[hash]);
106 static void gfs2_qd_dealloc(struct rcu_head *rcu)
108 struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu);
109 kmem_cache_free(gfs2_quotad_cachep, qd);
112 static void gfs2_qd_dispose(struct list_head *list)
114 struct gfs2_quota_data *qd;
115 struct gfs2_sbd *sdp;
117 while (!list_empty(list)) {
118 qd = list_first_entry(list, struct gfs2_quota_data, qd_lru);
119 sdp = qd->qd_gl->gl_name.ln_sbd;
121 list_del(&qd->qd_lru);
123 /* Free from the filesystem-specific list */
125 list_del(&qd->qd_list);
126 spin_unlock(&qd_lock);
128 spin_lock_bucket(qd->qd_hash);
129 hlist_bl_del_rcu(&qd->qd_hlist);
130 spin_unlock_bucket(qd->qd_hash);
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);
136 gfs2_glock_put(qd->qd_gl);
137 atomic_dec(&sdp->sd_quota_count);
139 /* Delete it from the common reclaim list */
140 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
145 static enum lru_status gfs2_qd_isolate(struct list_head *item,
146 struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
148 struct list_head *dispose = arg;
149 struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru);
151 if (!spin_trylock(&qd->qd_lockref.lock))
154 if (qd->qd_lockref.count == 0) {
155 lockref_mark_dead(&qd->qd_lockref);
156 list_lru_isolate_move(lru, &qd->qd_lru, dispose);
159 spin_unlock(&qd->qd_lockref.lock);
163 static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
164 struct shrink_control *sc)
169 if (!(sc->gfp_mask & __GFP_FS))
172 freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
173 gfs2_qd_isolate, &dispose);
175 gfs2_qd_dispose(&dispose);
180 static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
181 struct shrink_control *sc)
183 return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
186 struct shrinker gfs2_qd_shrinker = {
187 .count_objects = gfs2_qd_shrink_count,
188 .scan_objects = gfs2_qd_shrink_scan,
189 .seeks = DEFAULT_SEEKS,
190 .flags = SHRINKER_NUMA_AWARE,
194 static u64 qd2index(struct gfs2_quota_data *qd)
196 struct kqid qid = qd->qd_id;
197 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
198 ((qid.type == USRQUOTA) ? 0 : 1);
201 static u64 qd2offset(struct gfs2_quota_data *qd)
205 offset = qd2index(qd);
206 offset *= sizeof(struct gfs2_quota);
211 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
213 struct gfs2_quota_data *qd;
216 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
221 qd->qd_lockref.count = 1;
222 spin_lock_init(&qd->qd_lockref.lock);
225 INIT_LIST_HEAD(&qd->qd_lru);
228 error = gfs2_glock_get(sdp, qd2index(qd),
229 &gfs2_quota_glops, CREATE, &qd->qd_gl);
236 kmem_cache_free(gfs2_quotad_cachep, qd);
240 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
241 const struct gfs2_sbd *sdp,
244 struct gfs2_quota_data *qd;
245 struct hlist_bl_node *h;
247 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
248 if (!qid_eq(qd->qd_id, qid))
250 if (qd->qd_sbd != sdp)
252 if (lockref_get_not_dead(&qd->qd_lockref)) {
253 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
262 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
263 struct gfs2_quota_data **qdp)
265 struct gfs2_quota_data *qd, *new_qd;
266 unsigned int hash = gfs2_qd_hash(sdp, qid);
269 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
275 new_qd = qd_alloc(hash, sdp, qid);
280 spin_lock_bucket(hash);
281 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
284 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
285 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
286 atomic_inc(&sdp->sd_quota_count);
288 spin_unlock_bucket(hash);
289 spin_unlock(&qd_lock);
292 gfs2_glock_put(new_qd->qd_gl);
293 kmem_cache_free(gfs2_quotad_cachep, new_qd);
300 static void qd_hold(struct gfs2_quota_data *qd)
302 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
303 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
304 lockref_get(&qd->qd_lockref);
307 static void qd_put(struct gfs2_quota_data *qd)
309 if (lockref_put_or_lock(&qd->qd_lockref))
312 qd->qd_lockref.count = 0;
313 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
314 spin_unlock(&qd->qd_lockref.lock);
318 static int slot_get(struct gfs2_quota_data *qd)
320 struct gfs2_sbd *sdp = qd->qd_sbd;
324 spin_lock(&sdp->sd_bitmap_lock);
325 if (qd->qd_slot_count != 0)
329 bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
330 if (bit < sdp->sd_quota_slots) {
331 set_bit(bit, sdp->sd_quota_bitmap);
337 spin_unlock(&sdp->sd_bitmap_lock);
342 static void slot_hold(struct gfs2_quota_data *qd)
344 struct gfs2_sbd *sdp = qd->qd_sbd;
346 spin_lock(&sdp->sd_bitmap_lock);
347 gfs2_assert(sdp, qd->qd_slot_count);
349 spin_unlock(&sdp->sd_bitmap_lock);
352 static void slot_put(struct gfs2_quota_data *qd)
354 struct gfs2_sbd *sdp = qd->qd_sbd;
356 spin_lock(&sdp->sd_bitmap_lock);
357 gfs2_assert(sdp, qd->qd_slot_count);
358 if (!--qd->qd_slot_count) {
359 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
362 spin_unlock(&sdp->sd_bitmap_lock);
365 static int bh_get(struct gfs2_quota_data *qd)
367 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
368 struct inode *inode = sdp->sd_qc_inode;
369 struct gfs2_inode *ip = GFS2_I(inode);
370 unsigned int block, offset;
371 struct buffer_head *bh;
372 struct iomap iomap = { };
375 mutex_lock(&sdp->sd_quota_mutex);
377 if (qd->qd_bh_count++) {
378 mutex_unlock(&sdp->sd_quota_mutex);
382 block = qd->qd_slot / sdp->sd_qc_per_block;
383 offset = qd->qd_slot % sdp->sd_qc_per_block;
385 error = gfs2_iomap_get(inode,
386 (loff_t)block << inode->i_blkbits,
387 i_blocksize(inode), &iomap);
391 if (iomap.type != IOMAP_MAPPED)
394 error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits,
399 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
403 qd->qd_bh_qc = (struct gfs2_quota_change *)
404 (bh->b_data + sizeof(struct gfs2_meta_header) +
405 offset * sizeof(struct gfs2_quota_change));
407 mutex_unlock(&sdp->sd_quota_mutex);
415 mutex_unlock(&sdp->sd_quota_mutex);
419 static void bh_put(struct gfs2_quota_data *qd)
421 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
423 mutex_lock(&sdp->sd_quota_mutex);
424 gfs2_assert(sdp, qd->qd_bh_count);
425 if (!--qd->qd_bh_count) {
430 mutex_unlock(&sdp->sd_quota_mutex);
433 static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
436 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
437 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
438 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
441 if (!lockref_get_not_dead(&qd->qd_lockref))
444 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
445 set_bit(QDF_LOCKED, &qd->qd_flags);
446 qd->qd_change_sync = qd->qd_change;
451 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
453 struct gfs2_quota_data *qd = NULL, *iter;
458 if (sb_rdonly(sdp->sd_vfs))
463 list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) {
464 if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) {
470 spin_unlock(&qd_lock);
473 gfs2_assert_warn(sdp, qd->qd_change_sync);
476 clear_bit(QDF_LOCKED, &qd->qd_flags);
488 static void qd_unlock(struct gfs2_quota_data *qd)
490 gfs2_assert_warn(qd->qd_gl->gl_name.ln_sbd,
491 test_bit(QDF_LOCKED, &qd->qd_flags));
492 clear_bit(QDF_LOCKED, &qd->qd_flags);
498 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
499 struct gfs2_quota_data **qdp)
503 error = qd_get(sdp, qid, qdp);
507 error = slot_get(*qdp);
511 error = bh_get(*qdp);
524 static void qdsb_put(struct gfs2_quota_data *qd)
532 * gfs2_qa_get - make sure we have a quota allocations data structure,
534 * @ip: the inode for this reservation
536 int gfs2_qa_get(struct gfs2_inode *ip)
538 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
539 struct inode *inode = &ip->i_inode;
541 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
544 spin_lock(&inode->i_lock);
545 if (ip->i_qadata == NULL) {
546 struct gfs2_qadata *tmp;
548 spin_unlock(&inode->i_lock);
549 tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
553 spin_lock(&inode->i_lock);
554 if (ip->i_qadata == NULL)
557 kmem_cache_free(gfs2_qadata_cachep, tmp);
559 ip->i_qadata->qa_ref++;
560 spin_unlock(&inode->i_lock);
564 void gfs2_qa_put(struct gfs2_inode *ip)
566 struct inode *inode = &ip->i_inode;
568 spin_lock(&inode->i_lock);
569 if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
570 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
573 spin_unlock(&inode->i_lock);
576 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
578 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
579 struct gfs2_quota_data **qd;
582 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
585 error = gfs2_qa_get(ip);
589 qd = ip->i_qadata->qa_qd;
591 if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
592 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
597 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
600 ip->i_qadata->qa_qd_num++;
603 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
606 ip->i_qadata->qa_qd_num++;
609 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
610 !uid_eq(uid, ip->i_inode.i_uid)) {
611 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
614 ip->i_qadata->qa_qd_num++;
618 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
619 !gid_eq(gid, ip->i_inode.i_gid)) {
620 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
623 ip->i_qadata->qa_qd_num++;
629 gfs2_quota_unhold(ip);
634 void gfs2_quota_unhold(struct gfs2_inode *ip)
636 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
639 if (ip->i_qadata == NULL)
642 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
644 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
645 qdsb_put(ip->i_qadata->qa_qd[x]);
646 ip->i_qadata->qa_qd[x] = NULL;
648 ip->i_qadata->qa_qd_num = 0;
652 static int sort_qd(const void *a, const void *b)
654 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
655 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
657 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
659 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
664 static void do_qc(struct gfs2_quota_data *qd, s64 change)
666 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
667 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
668 struct gfs2_quota_change *qc = qd->qd_bh_qc;
671 mutex_lock(&sdp->sd_quota_mutex);
672 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
674 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
677 if (qd->qd_id.type == USRQUOTA)
678 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
679 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
682 x = be64_to_cpu(qc->qc_change) + change;
683 qc->qc_change = cpu_to_be64(x);
687 spin_unlock(&qd_lock);
690 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
691 clear_bit(QDF_CHANGE, &qd->qd_flags);
696 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
701 if (change < 0) /* Reset quiet flag if we freed some blocks */
702 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
703 mutex_unlock(&sdp->sd_quota_mutex);
706 static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index,
707 unsigned off, void *buf, unsigned bytes)
709 struct inode *inode = &ip->i_inode;
710 struct gfs2_sbd *sdp = GFS2_SB(inode);
711 struct address_space *mapping = inode->i_mapping;
713 struct buffer_head *bh;
716 unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
717 unsigned to_write = bytes, pg_off = off;
720 blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
723 page = find_or_create_page(mapping, index, GFP_NOFS);
726 if (!page_has_buffers(page))
727 create_empty_buffers(page, bsize, 0);
729 bh = page_buffers(page);
731 /* Find the beginning block within the page */
732 if (pg_off >= ((bnum * bsize) + bsize)) {
733 bh = bh->b_this_page;
738 if (!buffer_mapped(bh)) {
739 gfs2_block_map(inode, blk, bh, 1);
740 if (!buffer_mapped(bh))
742 /* If it's a newly allocated disk block, zero it */
744 zero_user(page, bnum * bsize, bh->b_size);
746 if (PageUptodate(page))
747 set_buffer_uptodate(bh);
748 if (!buffer_uptodate(bh)) {
749 ll_rw_block(REQ_OP_READ | REQ_META | REQ_PRIO, 1, &bh);
751 if (!buffer_uptodate(bh))
754 if (gfs2_is_jdata(ip))
755 gfs2_trans_add_data(ip->i_gl, bh);
757 gfs2_ordered_add_inode(ip);
759 /* If we need to write to the next block as well */
760 if (to_write > (bsize - boff)) {
761 pg_off += (bsize - boff);
762 to_write -= (bsize - boff);
763 boff = pg_off % bsize;
769 /* Write to the page, now that we have setup the buffer(s) */
770 kaddr = kmap_atomic(page);
771 memcpy(kaddr + off, buf, bytes);
772 flush_dcache_page(page);
773 kunmap_atomic(kaddr);
785 static int gfs2_write_disk_quota(struct gfs2_inode *ip, struct gfs2_quota *qp,
788 unsigned long pg_beg;
789 unsigned pg_off, nbytes, overflow = 0;
790 int pg_oflow = 0, error;
793 nbytes = sizeof(struct gfs2_quota);
795 pg_beg = loc >> PAGE_SHIFT;
796 pg_off = offset_in_page(loc);
798 /* If the quota straddles a page boundary, split the write in two */
799 if ((pg_off + nbytes) > PAGE_SIZE) {
801 overflow = (pg_off + nbytes) - PAGE_SIZE;
805 error = gfs2_write_buf_to_page(ip, pg_beg, pg_off, ptr,
807 /* If there's an overflow, write the remaining bytes to the next page */
808 if (!error && pg_oflow)
809 error = gfs2_write_buf_to_page(ip, pg_beg + 1, 0,
810 ptr + nbytes - overflow,
816 * gfs2_adjust_quota - adjust record of current block usage
817 * @ip: The quota inode
818 * @loc: Offset of the entry in the quota file
819 * @change: The amount of usage change to record
820 * @qd: The quota data
821 * @fdq: The updated limits to record
823 * This function was mostly borrowed from gfs2_block_truncate_page which was
824 * in turn mostly borrowed from ext3
826 * Returns: 0 or -ve on error
829 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
830 s64 change, struct gfs2_quota_data *qd,
831 struct qc_dqblk *fdq)
833 struct inode *inode = &ip->i_inode;
834 struct gfs2_sbd *sdp = GFS2_SB(inode);
839 if (gfs2_is_stuffed(ip)) {
840 err = gfs2_unstuff_dinode(ip);
845 memset(&q, 0, sizeof(struct gfs2_quota));
846 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
850 loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
852 be64_add_cpu(&q.qu_value, change);
853 if (((s64)be64_to_cpu(q.qu_value)) < 0)
854 q.qu_value = 0; /* Never go negative on quota usage */
855 qd->qd_qb.qb_value = q.qu_value;
857 if (fdq->d_fieldmask & QC_SPC_SOFT) {
858 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
859 qd->qd_qb.qb_warn = q.qu_warn;
861 if (fdq->d_fieldmask & QC_SPC_HARD) {
862 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
863 qd->qd_qb.qb_limit = q.qu_limit;
865 if (fdq->d_fieldmask & QC_SPACE) {
866 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
867 qd->qd_qb.qb_value = q.qu_value;
871 err = gfs2_write_disk_quota(ip, &q, loc);
873 size = loc + sizeof(struct gfs2_quota);
874 if (size > inode->i_size)
875 i_size_write(inode, size);
876 inode->i_mtime = inode->i_atime = current_time(inode);
877 mark_inode_dirty(inode);
878 set_bit(QDF_REFRESH, &qd->qd_flags);
884 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
886 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_name.ln_sbd;
887 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
888 struct gfs2_alloc_parms ap = { .aflags = 0, };
889 unsigned int data_blocks, ind_blocks;
890 struct gfs2_holder *ghs, i_gh;
892 struct gfs2_quota_data *qd;
895 unsigned int nalloc = 0, blocks;
898 error = gfs2_qa_get(ip);
902 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
903 &data_blocks, &ind_blocks);
905 ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
911 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
912 inode_lock(&ip->i_inode);
913 for (qx = 0; qx < num_qd; qx++) {
914 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
915 GL_NOCACHE, &ghs[qx]);
920 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
924 for (x = 0; x < num_qd; x++) {
925 offset = qd2offset(qda[x]);
926 if (gfs2_write_alloc_required(ip, offset,
927 sizeof(struct gfs2_quota)))
932 * 1 blk for unstuffing inode if stuffed. We add this extra
933 * block to the reservation unconditionally. If the inode
934 * doesn't need unstuffing, the block will be released to the
935 * rgrp since it won't be allocated during the transaction
937 /* +3 in the end for unstuffing block, inode size update block
938 * and another block in case quota straddles page boundary and
939 * two blocks need to be updated instead of 1 */
940 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
942 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
943 ap.target = reserved;
944 error = gfs2_inplace_reserve(ip, &ap);
949 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
951 error = gfs2_trans_begin(sdp, blocks, 0);
955 for (x = 0; x < num_qd; x++) {
957 offset = qd2offset(qd);
958 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
962 do_qc(qd, -qd->qd_change_sync);
963 set_bit(QDF_REFRESH, &qd->qd_flags);
971 gfs2_inplace_release(ip);
973 gfs2_glock_dq_uninit(&i_gh);
976 gfs2_glock_dq_uninit(&ghs[qx]);
977 inode_unlock(&ip->i_inode);
979 gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
980 GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
986 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
988 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
990 struct gfs2_quota_lvb *qlvb;
994 memset(&q, 0, sizeof(struct gfs2_quota));
996 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
1000 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1001 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
1003 qlvb->qb_limit = q.qu_limit;
1004 qlvb->qb_warn = q.qu_warn;
1005 qlvb->qb_value = q.qu_value;
1011 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
1012 struct gfs2_holder *q_gh)
1014 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
1015 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1016 struct gfs2_holder i_gh;
1020 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
1024 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1025 force_refresh = FORCE;
1027 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1029 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
1030 gfs2_glock_dq_uninit(q_gh);
1031 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1036 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1040 error = update_qd(sdp, qd);
1044 gfs2_glock_dq_uninit(&i_gh);
1045 gfs2_glock_dq_uninit(q_gh);
1053 gfs2_glock_dq_uninit(&i_gh);
1055 gfs2_glock_dq_uninit(q_gh);
1059 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
1061 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1062 struct gfs2_quota_data *qd;
1066 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1069 error = gfs2_quota_hold(ip, uid, gid);
1073 sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
1074 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
1076 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1077 qd = ip->i_qadata->qa_qd[x];
1078 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
1084 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1087 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1088 gfs2_quota_unhold(ip);
1094 static int need_sync(struct gfs2_quota_data *qd)
1096 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
1097 struct gfs2_tune *gt = &sdp->sd_tune;
1099 unsigned int num, den;
1102 if (!qd->qd_qb.qb_limit)
1105 spin_lock(&qd_lock);
1106 value = qd->qd_change;
1107 spin_unlock(&qd_lock);
1109 spin_lock(>->gt_spin);
1110 num = gt->gt_quota_scale_num;
1111 den = gt->gt_quota_scale_den;
1112 spin_unlock(>->gt_spin);
1116 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1117 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1120 value *= gfs2_jindex_size(sdp) * num;
1121 value = div_s64(value, den);
1122 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
1123 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1130 void gfs2_quota_unlock(struct gfs2_inode *ip)
1132 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1133 struct gfs2_quota_data *qda[4];
1134 unsigned int count = 0;
1138 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1141 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1142 struct gfs2_quota_data *qd;
1145 qd = ip->i_qadata->qa_qd[x];
1146 sync = need_sync(qd);
1148 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1152 spin_lock(&qd_lock);
1153 found = qd_check_sync(sdp, qd, NULL);
1154 spin_unlock(&qd_lock);
1159 gfs2_assert_warn(sdp, qd->qd_change_sync);
1161 clear_bit(QDF_LOCKED, &qd->qd_flags);
1171 do_sync(count, qda);
1172 for (x = 0; x < count; x++)
1176 gfs2_quota_unhold(ip);
1179 #define MAX_LINE 256
1181 static int print_message(struct gfs2_quota_data *qd, char *type)
1183 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
1185 fs_info(sdp, "quota %s for %s %u\n",
1187 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1188 from_kqid(&init_user_ns, qd->qd_id));
1194 * gfs2_quota_check - check if allocating new blocks will exceed quota
1195 * @ip: The inode for which this check is being performed
1196 * @uid: The uid to check against
1197 * @gid: The gid to check against
1198 * @ap: The allocation parameters. ap->target contains the requested
1199 * blocks. ap->min_target, if set, contains the minimum blks
1202 * Returns: 0 on success.
1203 * min_req = ap->min_target ? ap->min_target : ap->target;
1204 * quota must allow at least min_req blks for success and
1205 * ap->allowed is set to the number of blocks allowed
1207 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1208 * of blocks available.
1210 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1211 struct gfs2_alloc_parms *ap)
1213 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1214 struct gfs2_quota_data *qd;
1215 s64 value, warn, limit;
1219 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1220 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1223 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1224 qd = ip->i_qadata->qa_qd[x];
1226 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1227 qid_eq(qd->qd_id, make_kqid_gid(gid))))
1230 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1231 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1232 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1233 spin_lock(&qd_lock);
1234 value += qd->qd_change;
1235 spin_unlock(&qd_lock);
1237 if (limit > 0 && (limit - value) < ap->allowed)
1238 ap->allowed = limit - value;
1239 /* If we can't meet the target */
1240 if (limit && limit < (value + (s64)ap->target)) {
1241 /* If no min_target specified or we don't meet
1242 * min_target, return -EDQUOT */
1243 if (!ap->min_target || ap->min_target > ap->allowed) {
1244 if (!test_and_set_bit(QDF_QMSG_QUIET,
1246 print_message(qd, "exceeded");
1247 quota_send_warning(qd->qd_id,
1249 QUOTA_NL_BHARDWARN);
1254 } else if (warn && warn < value &&
1255 time_after_eq(jiffies, qd->qd_last_warn +
1256 gfs2_tune_get(sdp, gt_quota_warn_period)
1258 quota_send_warning(qd->qd_id,
1259 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1260 error = print_message(qd, "warning");
1261 qd->qd_last_warn = jiffies;
1267 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1268 kuid_t uid, kgid_t gid)
1270 struct gfs2_quota_data *qd;
1272 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1274 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON ||
1275 gfs2_assert_warn(sdp, change))
1277 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1280 if (gfs2_assert_withdraw(sdp, ip->i_qadata &&
1281 ip->i_qadata->qa_ref > 0))
1283 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1284 qd = ip->i_qadata->qa_qd[x];
1286 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1287 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1293 int gfs2_quota_sync(struct super_block *sb, int type)
1295 struct gfs2_sbd *sdp = sb->s_fs_info;
1296 struct gfs2_quota_data **qda;
1297 unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder);
1298 unsigned int num_qd;
1302 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1306 mutex_lock(&sdp->sd_quota_sync_mutex);
1307 sdp->sd_quota_sync_gen++;
1313 error = qd_fish(sdp, qda + num_qd);
1314 if (error || !qda[num_qd])
1316 if (++num_qd == max_qd)
1322 error = do_sync(num_qd, qda);
1324 for (x = 0; x < num_qd; x++)
1325 qda[x]->qd_sync_gen =
1326 sdp->sd_quota_sync_gen;
1328 for (x = 0; x < num_qd; x++)
1331 } while (!error && num_qd == max_qd);
1333 mutex_unlock(&sdp->sd_quota_sync_mutex);
1339 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1341 struct gfs2_quota_data *qd;
1342 struct gfs2_holder q_gh;
1345 error = qd_get(sdp, qid, &qd);
1349 error = do_glock(qd, FORCE, &q_gh);
1351 gfs2_glock_dq_uninit(&q_gh);
1357 int gfs2_quota_init(struct gfs2_sbd *sdp)
1359 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1360 u64 size = i_size_read(sdp->sd_qc_inode);
1361 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1362 unsigned int x, slot = 0;
1363 unsigned int found = 0;
1365 unsigned int bm_size;
1370 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1373 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1374 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1375 bm_size *= sizeof(unsigned long);
1377 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1378 if (sdp->sd_quota_bitmap == NULL)
1379 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1381 if (!sdp->sd_quota_bitmap)
1384 for (x = 0; x < blocks; x++) {
1385 struct buffer_head *bh;
1386 const struct gfs2_quota_change *qc;
1391 error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen);
1396 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1399 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1404 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1405 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1407 struct gfs2_quota_data *qd;
1408 s64 qc_change = be64_to_cpu(qc->qc_change);
1409 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1410 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1411 USRQUOTA : GRPQUOTA;
1412 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1413 be32_to_cpu(qc->qc_id));
1418 hash = gfs2_qd_hash(sdp, qc_id);
1419 qd = qd_alloc(hash, sdp, qc_id);
1425 set_bit(QDF_CHANGE, &qd->qd_flags);
1426 qd->qd_change = qc_change;
1428 qd->qd_slot_count = 1;
1430 spin_lock(&qd_lock);
1431 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1432 list_add(&qd->qd_list, &sdp->sd_quota_list);
1433 atomic_inc(&sdp->sd_quota_count);
1434 spin_unlock(&qd_lock);
1436 spin_lock_bucket(hash);
1437 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1438 spin_unlock_bucket(hash);
1449 fs_info(sdp, "found %u quota changes\n", found);
1454 gfs2_quota_cleanup(sdp);
1458 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1460 struct list_head *head = &sdp->sd_quota_list;
1461 struct gfs2_quota_data *qd;
1463 spin_lock(&qd_lock);
1464 while (!list_empty(head)) {
1465 qd = list_last_entry(head, struct gfs2_quota_data, qd_list);
1467 list_del(&qd->qd_list);
1469 /* Also remove if this qd exists in the reclaim list */
1470 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
1471 atomic_dec(&sdp->sd_quota_count);
1472 spin_unlock(&qd_lock);
1474 spin_lock_bucket(qd->qd_hash);
1475 hlist_bl_del_rcu(&qd->qd_hlist);
1476 spin_unlock_bucket(qd->qd_hash);
1478 gfs2_assert_warn(sdp, !qd->qd_change);
1479 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1480 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1482 gfs2_glock_put(qd->qd_gl);
1483 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
1485 spin_lock(&qd_lock);
1487 spin_unlock(&qd_lock);
1489 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1491 kvfree(sdp->sd_quota_bitmap);
1492 sdp->sd_quota_bitmap = NULL;
1495 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1497 if (error == 0 || error == -EROFS)
1499 if (!gfs2_withdrawn(sdp)) {
1500 if (!cmpxchg(&sdp->sd_log_error, 0, error))
1501 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1502 wake_up(&sdp->sd_logd_waitq);
1506 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1507 int (*fxn)(struct super_block *sb, int type),
1508 unsigned long t, unsigned long *timeo,
1509 unsigned int *new_timeo)
1512 int error = fxn(sdp->sd_vfs, 0);
1513 quotad_error(sdp, msg, error);
1514 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1520 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1521 if (!sdp->sd_statfs_force_sync) {
1522 sdp->sd_statfs_force_sync = 1;
1523 wake_up(&sdp->sd_quota_wait);
1529 * gfs2_quotad - Write cached quota changes into the quota file
1530 * @data: Pointer to GFS2 superblock
1534 int gfs2_quotad(void *data)
1536 struct gfs2_sbd *sdp = data;
1537 struct gfs2_tune *tune = &sdp->sd_tune;
1538 unsigned long statfs_timeo = 0;
1539 unsigned long quotad_timeo = 0;
1540 unsigned long t = 0;
1543 while (!kthread_should_stop()) {
1545 if (gfs2_withdrawn(sdp))
1547 /* Update the master statfs file */
1548 if (sdp->sd_statfs_force_sync) {
1549 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1550 quotad_error(sdp, "statfs", error);
1551 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1554 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1556 &tune->gt_statfs_quantum);
1558 /* Update quota file */
1559 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1560 "ad_timeo, &tune->gt_quota_quantum);
1565 t = min(quotad_timeo, statfs_timeo);
1567 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
1568 if (!sdp->sd_statfs_force_sync)
1569 t -= schedule_timeout(t);
1572 finish_wait(&sdp->sd_quota_wait, &wait);
1578 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1580 struct gfs2_sbd *sdp = sb->s_fs_info;
1582 memset(state, 0, sizeof(*state));
1584 switch (sdp->sd_args.ar_quota) {
1586 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1587 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1589 case GFS2_QUOTA_ACCOUNT:
1590 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1592 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1595 case GFS2_QUOTA_OFF:
1598 if (sdp->sd_quota_inode) {
1599 state->s_state[USRQUOTA].ino =
1600 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1601 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1603 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1604 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1605 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1609 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1610 struct qc_dqblk *fdq)
1612 struct gfs2_sbd *sdp = sb->s_fs_info;
1613 struct gfs2_quota_lvb *qlvb;
1614 struct gfs2_quota_data *qd;
1615 struct gfs2_holder q_gh;
1618 memset(fdq, 0, sizeof(*fdq));
1620 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1621 return -ESRCH; /* Crazy XFS error code */
1623 if ((qid.type != USRQUOTA) &&
1624 (qid.type != GRPQUOTA))
1627 error = qd_get(sdp, qid, &qd);
1630 error = do_glock(qd, FORCE, &q_gh);
1634 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1635 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1636 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1637 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1639 gfs2_glock_dq_uninit(&q_gh);
1645 /* GFS2 only supports a subset of the XFS fields */
1646 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1648 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1649 struct qc_dqblk *fdq)
1651 struct gfs2_sbd *sdp = sb->s_fs_info;
1652 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1653 struct gfs2_quota_data *qd;
1654 struct gfs2_holder q_gh, i_gh;
1655 unsigned int data_blocks, ind_blocks;
1656 unsigned int blocks = 0;
1661 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1662 return -ESRCH; /* Crazy XFS error code */
1664 if ((qid.type != USRQUOTA) &&
1665 (qid.type != GRPQUOTA))
1668 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1671 error = qd_get(sdp, qid, &qd);
1675 error = gfs2_qa_get(ip);
1679 inode_lock(&ip->i_inode);
1680 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1683 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1687 /* Check for existing entry, if none then alloc new blocks */
1688 error = update_qd(sdp, qd);
1692 /* If nothing has changed, this is a no-op */
1693 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1694 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1695 fdq->d_fieldmask ^= QC_SPC_SOFT;
1697 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1698 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1699 fdq->d_fieldmask ^= QC_SPC_HARD;
1701 if ((fdq->d_fieldmask & QC_SPACE) &&
1702 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1703 fdq->d_fieldmask ^= QC_SPACE;
1705 if (fdq->d_fieldmask == 0)
1708 offset = qd2offset(qd);
1709 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1710 if (gfs2_is_stuffed(ip))
1712 if (alloc_required) {
1713 struct gfs2_alloc_parms ap = { .aflags = 0, };
1714 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1715 &data_blocks, &ind_blocks);
1716 blocks = 1 + data_blocks + ind_blocks;
1718 error = gfs2_inplace_reserve(ip, &ap);
1721 blocks += gfs2_rg_blocks(ip, blocks);
1724 /* Some quotas span block boundaries and can update two blocks,
1725 adding an extra block to the transaction to handle such quotas */
1726 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1731 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1733 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
1735 gfs2_trans_end(sdp);
1738 gfs2_inplace_release(ip);
1740 gfs2_glock_dq_uninit(&i_gh);
1742 gfs2_glock_dq_uninit(&q_gh);
1745 inode_unlock(&ip->i_inode);
1751 const struct quotactl_ops gfs2_quotactl_ops = {
1752 .quota_sync = gfs2_quota_sync,
1753 .get_state = gfs2_quota_get_state,
1754 .get_dqblk = gfs2_get_dqblk,
1755 .set_dqblk = gfs2_set_dqblk,
1758 void __init gfs2_quota_hash_init(void)
1762 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1763 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);