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 kmem_cache_free(gfs2_quotad_cachep, qd);
115 static void gfs2_qd_dispose(struct gfs2_quota_data *qd)
117 struct gfs2_sbd *sdp = qd->qd_sbd;
120 list_del(&qd->qd_list);
121 spin_unlock(&qd_lock);
123 spin_lock_bucket(qd->qd_hash);
124 hlist_bl_del_rcu(&qd->qd_hlist);
125 spin_unlock_bucket(qd->qd_hash);
127 if (!gfs2_withdrawn(sdp)) {
128 gfs2_assert_warn(sdp, !qd->qd_change);
129 gfs2_assert_warn(sdp, !qd->qd_slot_count);
130 gfs2_assert_warn(sdp, !qd->qd_bh_count);
133 gfs2_glock_put(qd->qd_gl);
134 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
137 static void gfs2_qd_list_dispose(struct list_head *list)
139 struct gfs2_quota_data *qd;
141 while (!list_empty(list)) {
142 qd = list_first_entry(list, struct gfs2_quota_data, qd_lru);
143 list_del(&qd->qd_lru);
146 atomic_dec(&sdp->sd_quota_count);
151 static enum lru_status gfs2_qd_isolate(struct list_head *item,
152 struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
154 struct list_head *dispose = arg;
155 struct gfs2_quota_data *qd =
156 list_entry(item, struct gfs2_quota_data, qd_lru);
157 enum lru_status status;
159 if (!spin_trylock(&qd->qd_lockref.lock))
163 if (qd->qd_lockref.count == 0) {
164 lockref_mark_dead(&qd->qd_lockref);
165 list_lru_isolate_move(lru, &qd->qd_lru, dispose);
166 status = LRU_REMOVED;
169 spin_unlock(&qd->qd_lockref.lock);
173 static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
174 struct shrink_control *sc)
179 if (!(sc->gfp_mask & __GFP_FS))
182 freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
183 gfs2_qd_isolate, &dispose);
185 gfs2_qd_list_dispose(&dispose);
190 static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
191 struct shrink_control *sc)
193 return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
196 struct shrinker gfs2_qd_shrinker = {
197 .count_objects = gfs2_qd_shrink_count,
198 .scan_objects = gfs2_qd_shrink_scan,
199 .seeks = DEFAULT_SEEKS,
200 .flags = SHRINKER_NUMA_AWARE,
204 static u64 qd2index(struct gfs2_quota_data *qd)
206 struct kqid qid = qd->qd_id;
207 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
208 ((qid.type == USRQUOTA) ? 0 : 1);
211 static u64 qd2offset(struct gfs2_quota_data *qd)
215 offset = qd2index(qd);
216 offset *= sizeof(struct gfs2_quota);
221 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
223 struct gfs2_quota_data *qd;
226 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
231 qd->qd_lockref.count = 0;
232 spin_lock_init(&qd->qd_lockref.lock);
235 INIT_LIST_HEAD(&qd->qd_lru);
238 error = gfs2_glock_get(sdp, qd2index(qd),
239 &gfs2_quota_glops, CREATE, &qd->qd_gl);
246 kmem_cache_free(gfs2_quotad_cachep, qd);
250 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
251 const struct gfs2_sbd *sdp,
254 struct gfs2_quota_data *qd;
255 struct hlist_bl_node *h;
257 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
258 if (!qid_eq(qd->qd_id, qid))
260 if (qd->qd_sbd != sdp)
262 if (lockref_get_not_dead(&qd->qd_lockref)) {
263 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
272 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
273 struct gfs2_quota_data **qdp)
275 struct gfs2_quota_data *qd, *new_qd;
276 unsigned int hash = gfs2_qd_hash(sdp, qid);
279 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
285 new_qd = qd_alloc(hash, sdp, qid);
290 spin_lock_bucket(hash);
291 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
293 new_qd->qd_lockref.count++;
295 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
296 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
297 atomic_inc(&sdp->sd_quota_count);
299 spin_unlock_bucket(hash);
300 spin_unlock(&qd_lock);
303 gfs2_glock_put(new_qd->qd_gl);
304 kmem_cache_free(gfs2_quotad_cachep, new_qd);
311 static void qd_hold(struct gfs2_quota_data *qd)
313 struct gfs2_sbd *sdp = qd->qd_sbd;
314 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
315 lockref_get(&qd->qd_lockref);
318 static void qd_put(struct gfs2_quota_data *qd)
320 if (lockref_put_or_lock(&qd->qd_lockref))
323 qd->qd_lockref.count = 0;
324 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
325 spin_unlock(&qd->qd_lockref.lock);
329 static int slot_get(struct gfs2_quota_data *qd)
331 struct gfs2_sbd *sdp = qd->qd_sbd;
335 spin_lock(&sdp->sd_bitmap_lock);
336 if (qd->qd_slot_count != 0)
340 bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
341 if (bit < sdp->sd_quota_slots) {
342 set_bit(bit, sdp->sd_quota_bitmap);
348 spin_unlock(&sdp->sd_bitmap_lock);
353 static void slot_hold(struct gfs2_quota_data *qd)
355 struct gfs2_sbd *sdp = qd->qd_sbd;
357 spin_lock(&sdp->sd_bitmap_lock);
358 gfs2_assert(sdp, qd->qd_slot_count);
360 spin_unlock(&sdp->sd_bitmap_lock);
363 static void slot_put(struct gfs2_quota_data *qd)
365 struct gfs2_sbd *sdp = qd->qd_sbd;
367 spin_lock(&sdp->sd_bitmap_lock);
368 gfs2_assert(sdp, qd->qd_slot_count);
369 if (!--qd->qd_slot_count) {
370 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
373 spin_unlock(&sdp->sd_bitmap_lock);
376 static int bh_get(struct gfs2_quota_data *qd)
378 struct gfs2_sbd *sdp = qd->qd_sbd;
379 struct inode *inode = sdp->sd_qc_inode;
380 struct gfs2_inode *ip = GFS2_I(inode);
381 unsigned int block, offset;
382 struct buffer_head *bh;
383 struct iomap iomap = { };
386 mutex_lock(&sdp->sd_quota_mutex);
388 if (qd->qd_bh_count++) {
389 mutex_unlock(&sdp->sd_quota_mutex);
393 block = qd->qd_slot / sdp->sd_qc_per_block;
394 offset = qd->qd_slot % sdp->sd_qc_per_block;
396 error = gfs2_iomap_get(inode,
397 (loff_t)block << inode->i_blkbits,
398 i_blocksize(inode), &iomap);
402 if (iomap.type != IOMAP_MAPPED)
405 error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits,
410 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
414 qd->qd_bh_qc = (struct gfs2_quota_change *)
415 (bh->b_data + sizeof(struct gfs2_meta_header) +
416 offset * sizeof(struct gfs2_quota_change));
418 mutex_unlock(&sdp->sd_quota_mutex);
426 mutex_unlock(&sdp->sd_quota_mutex);
430 static void bh_put(struct gfs2_quota_data *qd)
432 struct gfs2_sbd *sdp = qd->qd_sbd;
434 mutex_lock(&sdp->sd_quota_mutex);
435 gfs2_assert(sdp, qd->qd_bh_count);
436 if (!--qd->qd_bh_count) {
441 mutex_unlock(&sdp->sd_quota_mutex);
444 static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
447 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
448 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
449 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
452 if (!lockref_get_not_dead(&qd->qd_lockref))
455 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
456 set_bit(QDF_LOCKED, &qd->qd_flags);
457 qd->qd_change_sync = qd->qd_change;
462 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
464 struct gfs2_quota_data *qd = NULL, *iter;
469 if (sb_rdonly(sdp->sd_vfs))
474 list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) {
475 if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) {
481 spin_unlock(&qd_lock);
486 clear_bit(QDF_LOCKED, &qd->qd_flags);
498 static void qd_unlock(struct gfs2_quota_data *qd)
500 gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags));
501 clear_bit(QDF_LOCKED, &qd->qd_flags);
507 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
508 struct gfs2_quota_data **qdp)
512 error = qd_get(sdp, qid, qdp);
516 error = slot_get(*qdp);
520 error = bh_get(*qdp);
533 static void qdsb_put(struct gfs2_quota_data *qd)
541 * gfs2_qa_get - make sure we have a quota allocations data structure,
543 * @ip: the inode for this reservation
545 int gfs2_qa_get(struct gfs2_inode *ip)
547 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
548 struct inode *inode = &ip->i_inode;
550 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
553 spin_lock(&inode->i_lock);
554 if (ip->i_qadata == NULL) {
555 struct gfs2_qadata *tmp;
557 spin_unlock(&inode->i_lock);
558 tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
562 spin_lock(&inode->i_lock);
563 if (ip->i_qadata == NULL)
566 kmem_cache_free(gfs2_qadata_cachep, tmp);
568 ip->i_qadata->qa_ref++;
569 spin_unlock(&inode->i_lock);
573 void gfs2_qa_put(struct gfs2_inode *ip)
575 struct inode *inode = &ip->i_inode;
577 spin_lock(&inode->i_lock);
578 if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
579 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
582 spin_unlock(&inode->i_lock);
585 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
587 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
588 struct gfs2_quota_data **qd;
591 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
594 error = gfs2_qa_get(ip);
598 qd = ip->i_qadata->qa_qd;
600 if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
601 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
607 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
610 ip->i_qadata->qa_qd_num++;
613 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
616 ip->i_qadata->qa_qd_num++;
619 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
620 !uid_eq(uid, ip->i_inode.i_uid)) {
621 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
624 ip->i_qadata->qa_qd_num++;
628 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
629 !gid_eq(gid, ip->i_inode.i_gid)) {
630 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
633 ip->i_qadata->qa_qd_num++;
639 gfs2_quota_unhold(ip);
644 void gfs2_quota_unhold(struct gfs2_inode *ip)
646 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
649 if (ip->i_qadata == NULL)
652 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
654 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
655 qdsb_put(ip->i_qadata->qa_qd[x]);
656 ip->i_qadata->qa_qd[x] = NULL;
658 ip->i_qadata->qa_qd_num = 0;
662 static int sort_qd(const void *a, const void *b)
664 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
665 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
667 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
669 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
674 static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type)
676 struct gfs2_sbd *sdp = qd->qd_sbd;
677 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
678 struct gfs2_quota_change *qc = qd->qd_bh_qc;
681 mutex_lock(&sdp->sd_quota_mutex);
682 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
684 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
687 if (qd->qd_id.type == USRQUOTA)
688 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
689 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
692 x = be64_to_cpu(qc->qc_change) + change;
693 qc->qc_change = cpu_to_be64(x);
697 spin_unlock(&qd_lock);
699 if (qc_type == QC_CHANGE) {
700 if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
705 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
706 clear_bit(QDF_CHANGE, &qd->qd_flags);
713 if (change < 0) /* Reset quiet flag if we freed some blocks */
714 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
715 mutex_unlock(&sdp->sd_quota_mutex);
718 static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index,
719 unsigned off, void *buf, unsigned bytes)
721 struct inode *inode = &ip->i_inode;
722 struct gfs2_sbd *sdp = GFS2_SB(inode);
723 struct address_space *mapping = inode->i_mapping;
725 struct buffer_head *bh;
727 unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
728 unsigned to_write = bytes, pg_off = off;
731 blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
734 page = grab_cache_page(mapping, index);
737 if (!page_has_buffers(page))
738 create_empty_buffers(page, bsize, 0);
740 bh = page_buffers(page);
742 /* Find the beginning block within the page */
743 if (pg_off >= ((bnum * bsize) + bsize)) {
744 bh = bh->b_this_page;
749 if (!buffer_mapped(bh)) {
750 gfs2_block_map(inode, blk, bh, 1);
751 if (!buffer_mapped(bh))
753 /* If it's a newly allocated disk block, zero it */
755 zero_user(page, bnum * bsize, bh->b_size);
757 if (PageUptodate(page))
758 set_buffer_uptodate(bh);
759 if (bh_read(bh, REQ_META | REQ_PRIO) < 0)
761 if (gfs2_is_jdata(ip))
762 gfs2_trans_add_data(ip->i_gl, bh);
764 gfs2_ordered_add_inode(ip);
766 /* If we need to write to the next block as well */
767 if (to_write > (bsize - boff)) {
768 pg_off += (bsize - boff);
769 to_write -= (bsize - boff);
770 boff = pg_off % bsize;
776 /* Write to the page, now that we have setup the buffer(s) */
777 memcpy_to_page(page, off, buf, bytes);
778 flush_dcache_page(page);
790 static int gfs2_write_disk_quota(struct gfs2_inode *ip, struct gfs2_quota *qp,
793 unsigned long pg_beg;
794 unsigned pg_off, nbytes, overflow = 0;
795 int pg_oflow = 0, error;
798 nbytes = sizeof(struct gfs2_quota);
800 pg_beg = loc >> PAGE_SHIFT;
801 pg_off = offset_in_page(loc);
803 /* If the quota straddles a page boundary, split the write in two */
804 if ((pg_off + nbytes) > PAGE_SIZE) {
806 overflow = (pg_off + nbytes) - PAGE_SIZE;
810 error = gfs2_write_buf_to_page(ip, pg_beg, pg_off, ptr,
812 /* If there's an overflow, write the remaining bytes to the next page */
813 if (!error && pg_oflow)
814 error = gfs2_write_buf_to_page(ip, pg_beg + 1, 0,
815 ptr + nbytes - overflow,
821 * gfs2_adjust_quota - adjust record of current block usage
822 * @ip: The quota inode
823 * @loc: Offset of the entry in the quota file
824 * @change: The amount of usage change to record
825 * @qd: The quota data
826 * @fdq: The updated limits to record
828 * This function was mostly borrowed from gfs2_block_truncate_page which was
829 * in turn mostly borrowed from ext3
831 * Returns: 0 or -ve on error
834 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
835 s64 change, struct gfs2_quota_data *qd,
836 struct qc_dqblk *fdq)
838 struct inode *inode = &ip->i_inode;
839 struct gfs2_sbd *sdp = GFS2_SB(inode);
844 if (gfs2_is_stuffed(ip)) {
845 err = gfs2_unstuff_dinode(ip);
850 memset(&q, 0, sizeof(struct gfs2_quota));
851 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
855 loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
857 be64_add_cpu(&q.qu_value, change);
858 if (((s64)be64_to_cpu(q.qu_value)) < 0)
859 q.qu_value = 0; /* Never go negative on quota usage */
860 qd->qd_qb.qb_value = q.qu_value;
862 if (fdq->d_fieldmask & QC_SPC_SOFT) {
863 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
864 qd->qd_qb.qb_warn = q.qu_warn;
866 if (fdq->d_fieldmask & QC_SPC_HARD) {
867 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
868 qd->qd_qb.qb_limit = q.qu_limit;
870 if (fdq->d_fieldmask & QC_SPACE) {
871 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
872 qd->qd_qb.qb_value = q.qu_value;
876 err = gfs2_write_disk_quota(ip, &q, loc);
878 size = loc + sizeof(struct gfs2_quota);
879 if (size > inode->i_size)
880 i_size_write(inode, size);
881 inode->i_mtime = inode->i_atime = current_time(inode);
882 mark_inode_dirty(inode);
883 set_bit(QDF_REFRESH, &qd->qd_flags);
889 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
891 struct gfs2_sbd *sdp = (*qda)->qd_sbd;
892 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
893 struct gfs2_alloc_parms ap = { .aflags = 0, };
894 unsigned int data_blocks, ind_blocks;
895 struct gfs2_holder *ghs, i_gh;
897 struct gfs2_quota_data *qd;
900 unsigned int nalloc = 0, blocks;
903 error = gfs2_qa_get(ip);
907 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
908 &data_blocks, &ind_blocks);
910 ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
916 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
917 inode_lock(&ip->i_inode);
918 for (qx = 0; qx < num_qd; qx++) {
919 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
920 GL_NOCACHE, &ghs[qx]);
925 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
929 for (x = 0; x < num_qd; x++) {
930 offset = qd2offset(qda[x]);
931 if (gfs2_write_alloc_required(ip, offset,
932 sizeof(struct gfs2_quota)))
937 * 1 blk for unstuffing inode if stuffed. We add this extra
938 * block to the reservation unconditionally. If the inode
939 * doesn't need unstuffing, the block will be released to the
940 * rgrp since it won't be allocated during the transaction
942 /* +3 in the end for unstuffing block, inode size update block
943 * and another block in case quota straddles page boundary and
944 * two blocks need to be updated instead of 1 */
945 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
947 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
948 ap.target = reserved;
949 error = gfs2_inplace_reserve(ip, &ap);
954 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
956 error = gfs2_trans_begin(sdp, blocks, 0);
960 for (x = 0; x < num_qd; x++) {
962 offset = qd2offset(qd);
963 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
967 do_qc(qd, -qd->qd_change_sync, QC_SYNC);
968 set_bit(QDF_REFRESH, &qd->qd_flags);
976 gfs2_inplace_release(ip);
978 gfs2_glock_dq_uninit(&i_gh);
981 gfs2_glock_dq_uninit(&ghs[qx]);
982 inode_unlock(&ip->i_inode);
984 gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
985 GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
991 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
993 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
995 struct gfs2_quota_lvb *qlvb;
999 memset(&q, 0, sizeof(struct gfs2_quota));
1000 pos = qd2offset(qd);
1001 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
1005 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1006 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
1008 qlvb->qb_limit = q.qu_limit;
1009 qlvb->qb_warn = q.qu_warn;
1010 qlvb->qb_value = q.qu_value;
1016 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
1017 struct gfs2_holder *q_gh)
1019 struct gfs2_sbd *sdp = qd->qd_sbd;
1020 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1021 struct gfs2_holder i_gh;
1024 gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd);
1026 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
1030 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1031 force_refresh = FORCE;
1033 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1035 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
1036 gfs2_glock_dq_uninit(q_gh);
1037 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1042 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1046 error = update_qd(sdp, qd);
1050 gfs2_glock_dq_uninit(&i_gh);
1051 gfs2_glock_dq_uninit(q_gh);
1059 gfs2_glock_dq_uninit(&i_gh);
1061 gfs2_glock_dq_uninit(q_gh);
1065 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
1067 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1068 struct gfs2_quota_data *qd;
1072 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1075 error = gfs2_quota_hold(ip, uid, gid);
1079 sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
1080 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
1082 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1083 qd = ip->i_qadata->qa_qd[x];
1084 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
1090 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1093 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1094 gfs2_quota_unhold(ip);
1100 static int need_sync(struct gfs2_quota_data *qd)
1102 struct gfs2_sbd *sdp = qd->qd_sbd;
1103 struct gfs2_tune *gt = &sdp->sd_tune;
1105 unsigned int num, den;
1108 if (!qd->qd_qb.qb_limit)
1111 spin_lock(&qd_lock);
1112 value = qd->qd_change;
1113 spin_unlock(&qd_lock);
1115 spin_lock(>->gt_spin);
1116 num = gt->gt_quota_scale_num;
1117 den = gt->gt_quota_scale_den;
1118 spin_unlock(>->gt_spin);
1122 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1123 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1126 value *= gfs2_jindex_size(sdp) * num;
1127 value = div_s64(value, den);
1128 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
1129 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
1136 void gfs2_quota_unlock(struct gfs2_inode *ip)
1138 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1139 struct gfs2_quota_data *qda[4];
1140 unsigned int count = 0;
1144 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1147 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1148 struct gfs2_quota_data *qd;
1151 qd = ip->i_qadata->qa_qd[x];
1152 sync = need_sync(qd);
1154 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1158 spin_lock(&qd_lock);
1159 found = qd_check_sync(sdp, qd, NULL);
1160 spin_unlock(&qd_lock);
1165 gfs2_assert_warn(sdp, qd->qd_change_sync);
1167 clear_bit(QDF_LOCKED, &qd->qd_flags);
1177 do_sync(count, qda);
1178 for (x = 0; x < count; x++)
1182 gfs2_quota_unhold(ip);
1185 #define MAX_LINE 256
1187 static int print_message(struct gfs2_quota_data *qd, char *type)
1189 struct gfs2_sbd *sdp = qd->qd_sbd;
1191 fs_info(sdp, "quota %s for %s %u\n",
1193 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1194 from_kqid(&init_user_ns, qd->qd_id));
1200 * gfs2_quota_check - check if allocating new blocks will exceed quota
1201 * @ip: The inode for which this check is being performed
1202 * @uid: The uid to check against
1203 * @gid: The gid to check against
1204 * @ap: The allocation parameters. ap->target contains the requested
1205 * blocks. ap->min_target, if set, contains the minimum blks
1208 * Returns: 0 on success.
1209 * min_req = ap->min_target ? ap->min_target : ap->target;
1210 * quota must allow at least min_req blks for success and
1211 * ap->allowed is set to the number of blocks allowed
1213 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1214 * of blocks available.
1216 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1217 struct gfs2_alloc_parms *ap)
1219 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1220 struct gfs2_quota_data *qd;
1221 s64 value, warn, limit;
1225 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1226 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1229 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1230 qd = ip->i_qadata->qa_qd[x];
1232 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1233 qid_eq(qd->qd_id, make_kqid_gid(gid))))
1236 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1237 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1238 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1239 spin_lock(&qd_lock);
1240 value += qd->qd_change;
1241 spin_unlock(&qd_lock);
1243 if (limit > 0 && (limit - value) < ap->allowed)
1244 ap->allowed = limit - value;
1245 /* If we can't meet the target */
1246 if (limit && limit < (value + (s64)ap->target)) {
1247 /* If no min_target specified or we don't meet
1248 * min_target, return -EDQUOT */
1249 if (!ap->min_target || ap->min_target > ap->allowed) {
1250 if (!test_and_set_bit(QDF_QMSG_QUIET,
1252 print_message(qd, "exceeded");
1253 quota_send_warning(qd->qd_id,
1255 QUOTA_NL_BHARDWARN);
1260 } else if (warn && warn < value &&
1261 time_after_eq(jiffies, qd->qd_last_warn +
1262 gfs2_tune_get(sdp, gt_quota_warn_period)
1264 quota_send_warning(qd->qd_id,
1265 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1266 error = print_message(qd, "warning");
1267 qd->qd_last_warn = jiffies;
1273 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1274 kuid_t uid, kgid_t gid)
1276 struct gfs2_quota_data *qd;
1278 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1280 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON ||
1281 gfs2_assert_warn(sdp, change))
1283 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1286 if (gfs2_assert_withdraw(sdp, ip->i_qadata &&
1287 ip->i_qadata->qa_ref > 0))
1289 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1290 qd = ip->i_qadata->qa_qd[x];
1292 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1293 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1294 do_qc(qd, change, QC_CHANGE);
1299 int gfs2_quota_sync(struct super_block *sb, int type)
1301 struct gfs2_sbd *sdp = sb->s_fs_info;
1302 struct gfs2_quota_data **qda;
1303 unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder);
1304 unsigned int num_qd;
1308 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1312 mutex_lock(&sdp->sd_quota_sync_mutex);
1313 sdp->sd_quota_sync_gen++;
1319 error = qd_fish(sdp, qda + num_qd);
1320 if (error || !qda[num_qd])
1322 if (++num_qd == max_qd)
1328 error = do_sync(num_qd, qda);
1330 for (x = 0; x < num_qd; x++)
1331 qda[x]->qd_sync_gen =
1332 sdp->sd_quota_sync_gen;
1334 for (x = 0; x < num_qd; x++)
1337 } while (!error && num_qd == max_qd);
1339 mutex_unlock(&sdp->sd_quota_sync_mutex);
1345 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1347 struct gfs2_quota_data *qd;
1348 struct gfs2_holder q_gh;
1351 error = qd_get(sdp, qid, &qd);
1355 error = do_glock(qd, FORCE, &q_gh);
1357 gfs2_glock_dq_uninit(&q_gh);
1363 int gfs2_quota_init(struct gfs2_sbd *sdp)
1365 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1366 u64 size = i_size_read(sdp->sd_qc_inode);
1367 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1368 unsigned int x, slot = 0;
1369 unsigned int found = 0;
1371 unsigned int bm_size;
1376 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1379 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1380 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1381 bm_size *= sizeof(unsigned long);
1383 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1384 if (sdp->sd_quota_bitmap == NULL)
1385 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1387 if (!sdp->sd_quota_bitmap)
1390 for (x = 0; x < blocks; x++) {
1391 struct buffer_head *bh;
1392 const struct gfs2_quota_change *qc;
1397 error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen);
1402 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1405 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1410 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1411 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1413 struct gfs2_quota_data *qd;
1414 s64 qc_change = be64_to_cpu(qc->qc_change);
1415 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1416 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1417 USRQUOTA : GRPQUOTA;
1418 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1419 be32_to_cpu(qc->qc_id));
1424 hash = gfs2_qd_hash(sdp, qc_id);
1425 qd = qd_alloc(hash, sdp, qc_id);
1431 set_bit(QDF_CHANGE, &qd->qd_flags);
1432 qd->qd_change = qc_change;
1434 qd->qd_slot_count = 1;
1436 spin_lock(&qd_lock);
1437 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1438 list_add(&qd->qd_list, &sdp->sd_quota_list);
1439 atomic_inc(&sdp->sd_quota_count);
1440 spin_unlock(&qd_lock);
1442 spin_lock_bucket(hash);
1443 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1444 spin_unlock_bucket(hash);
1455 fs_info(sdp, "found %u quota changes\n", found);
1460 gfs2_quota_cleanup(sdp);
1464 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1466 struct gfs2_quota_data *qd;
1469 spin_lock(&qd_lock);
1470 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1471 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
1472 list_add(&qd->qd_lru, &dispose);
1474 spin_unlock(&qd_lock);
1476 gfs2_qd_list_dispose(&dispose);
1477 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1479 kvfree(sdp->sd_quota_bitmap);
1480 sdp->sd_quota_bitmap = NULL;
1483 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1485 if (error == 0 || error == -EROFS)
1487 if (!gfs2_withdrawn(sdp)) {
1488 if (!cmpxchg(&sdp->sd_log_error, 0, error))
1489 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1490 wake_up(&sdp->sd_logd_waitq);
1494 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1495 int (*fxn)(struct super_block *sb, int type),
1496 unsigned long t, unsigned long *timeo,
1497 unsigned int *new_timeo)
1500 int error = fxn(sdp->sd_vfs, 0);
1501 quotad_error(sdp, msg, error);
1502 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1508 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1509 if (!sdp->sd_statfs_force_sync) {
1510 sdp->sd_statfs_force_sync = 1;
1511 wake_up(&sdp->sd_quota_wait);
1517 * gfs2_quotad - Write cached quota changes into the quota file
1518 * @data: Pointer to GFS2 superblock
1522 int gfs2_quotad(void *data)
1524 struct gfs2_sbd *sdp = data;
1525 struct gfs2_tune *tune = &sdp->sd_tune;
1526 unsigned long statfs_timeo = 0;
1527 unsigned long quotad_timeo = 0;
1528 unsigned long t = 0;
1531 while (!kthread_should_stop()) {
1533 if (gfs2_withdrawn(sdp))
1535 /* Update the master statfs file */
1536 if (sdp->sd_statfs_force_sync) {
1537 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1538 quotad_error(sdp, "statfs", error);
1539 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1542 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1544 &tune->gt_statfs_quantum);
1546 /* Update quota file */
1547 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1548 "ad_timeo, &tune->gt_quota_quantum);
1553 t = min(quotad_timeo, statfs_timeo);
1555 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
1556 if (!sdp->sd_statfs_force_sync)
1557 t -= schedule_timeout(t);
1560 finish_wait(&sdp->sd_quota_wait, &wait);
1566 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1568 struct gfs2_sbd *sdp = sb->s_fs_info;
1570 memset(state, 0, sizeof(*state));
1572 switch (sdp->sd_args.ar_quota) {
1574 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1575 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1577 case GFS2_QUOTA_ACCOUNT:
1578 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1580 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1583 case GFS2_QUOTA_OFF:
1586 if (sdp->sd_quota_inode) {
1587 state->s_state[USRQUOTA].ino =
1588 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1589 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1591 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1592 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1593 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1597 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1598 struct qc_dqblk *fdq)
1600 struct gfs2_sbd *sdp = sb->s_fs_info;
1601 struct gfs2_quota_lvb *qlvb;
1602 struct gfs2_quota_data *qd;
1603 struct gfs2_holder q_gh;
1606 memset(fdq, 0, sizeof(*fdq));
1608 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1609 return -ESRCH; /* Crazy XFS error code */
1611 if ((qid.type != USRQUOTA) &&
1612 (qid.type != GRPQUOTA))
1615 error = qd_get(sdp, qid, &qd);
1618 error = do_glock(qd, FORCE, &q_gh);
1622 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1623 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1624 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1625 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1627 gfs2_glock_dq_uninit(&q_gh);
1633 /* GFS2 only supports a subset of the XFS fields */
1634 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1636 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1637 struct qc_dqblk *fdq)
1639 struct gfs2_sbd *sdp = sb->s_fs_info;
1640 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1641 struct gfs2_quota_data *qd;
1642 struct gfs2_holder q_gh, i_gh;
1643 unsigned int data_blocks, ind_blocks;
1644 unsigned int blocks = 0;
1649 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1650 return -ESRCH; /* Crazy XFS error code */
1652 if ((qid.type != USRQUOTA) &&
1653 (qid.type != GRPQUOTA))
1656 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1659 error = qd_get(sdp, qid, &qd);
1663 error = gfs2_qa_get(ip);
1667 inode_lock(&ip->i_inode);
1668 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1671 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1675 /* Check for existing entry, if none then alloc new blocks */
1676 error = update_qd(sdp, qd);
1680 /* If nothing has changed, this is a no-op */
1681 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1682 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1683 fdq->d_fieldmask ^= QC_SPC_SOFT;
1685 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1686 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1687 fdq->d_fieldmask ^= QC_SPC_HARD;
1689 if ((fdq->d_fieldmask & QC_SPACE) &&
1690 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1691 fdq->d_fieldmask ^= QC_SPACE;
1693 if (fdq->d_fieldmask == 0)
1696 offset = qd2offset(qd);
1697 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1698 if (gfs2_is_stuffed(ip))
1700 if (alloc_required) {
1701 struct gfs2_alloc_parms ap = { .aflags = 0, };
1702 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1703 &data_blocks, &ind_blocks);
1704 blocks = 1 + data_blocks + ind_blocks;
1706 error = gfs2_inplace_reserve(ip, &ap);
1709 blocks += gfs2_rg_blocks(ip, blocks);
1712 /* Some quotas span block boundaries and can update two blocks,
1713 adding an extra block to the transaction to handle such quotas */
1714 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1719 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1721 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
1723 gfs2_trans_end(sdp);
1726 gfs2_inplace_release(ip);
1728 gfs2_glock_dq_uninit(&i_gh);
1730 gfs2_glock_dq_uninit(&q_gh);
1733 inode_unlock(&ip->i_inode);
1739 const struct quotactl_ops gfs2_quotactl_ops = {
1740 .quota_sync = gfs2_quota_sync,
1741 .get_state = gfs2_quota_get_state,
1742 .get_dqblk = gfs2_get_dqblk,
1743 .set_dqblk = gfs2_set_dqblk,
1746 void __init gfs2_quota_hash_init(void)
1750 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1751 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);