2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
11 * Quota change tags are associated with each transaction that allocates or
12 * deallocates space. Those changes are accumulated locally to each node (in a
13 * per-node file) and then are periodically synced to the quota file. This
14 * avoids the bottleneck of constantly touching the quota file, but introduces
15 * fuzziness in the current usage value of IDs that are being used on different
16 * nodes in the cluster simultaneously. So, it is possible for a user on
17 * multiple nodes to overrun their quota, but that overrun is controlable.
18 * Since quota tags are part of transactions, there is no need to a quota check
19 * program to be run on node crashes or anything like that.
21 * There are couple of knobs that let the administrator manage the quota
22 * fuzziness. "quota_quantum" sets the maximum time a quota change can be
23 * sitting on one node before being synced to the quota file. (The default is
24 * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency
25 * of quota file syncs increases as the user moves closer to their limit. The
26 * more frequent the syncs, the more accurate the quota enforcement, but that
27 * means that there is more contention between the nodes for the quota file.
28 * The default value is one. This sets the maximum theoretical quota overrun
29 * (with infinite node with infinite bandwidth) to twice the user's limit. (In
30 * practice, the maximum overrun you see should be much less.) A "quota_scale"
31 * number greater than one makes quota syncs more frequent and reduces the
32 * maximum overrun. Numbers less than one (but greater than zero) make quota
33 * syncs less frequent.
35 * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
36 * the quota file, so it is not being constantly read.
39 #include <linux/sched.h>
40 #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/gfs2_ondisk.h>
49 #include "lm_interface.h"
62 #include "ops_address.h"
68 static u64 qd2offset(struct gfs2_quota_data *qd)
72 offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags);
73 offset *= sizeof(struct gfs2_quota);
78 static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
79 struct gfs2_quota_data **qdp)
81 struct gfs2_quota_data *qd;
84 qd = kzalloc(sizeof(struct gfs2_quota_data), GFP_KERNEL);
91 set_bit(QDF_USER, &qd->qd_flags);
94 error = gfs2_glock_get(sdp, 2 * (u64)id + !user,
95 &gfs2_quota_glops, CREATE, &qd->qd_gl);
99 error = gfs2_lvb_hold(qd->qd_gl);
100 gfs2_glock_put(qd->qd_gl);
113 static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
114 struct gfs2_quota_data **qdp)
116 struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
123 spin_lock(&sdp->sd_quota_spin);
124 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
125 if (qd->qd_id == id &&
126 !test_bit(QDF_USER, &qd->qd_flags) == !user) {
138 list_add(&qd->qd_list, &sdp->sd_quota_list);
139 atomic_inc(&sdp->sd_quota_count);
143 spin_unlock(&sdp->sd_quota_spin);
147 gfs2_lvb_unhold(new_qd->qd_gl);
154 error = qd_alloc(sdp, user, id, &new_qd);
160 static void qd_hold(struct gfs2_quota_data *qd)
162 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
164 spin_lock(&sdp->sd_quota_spin);
165 gfs2_assert(sdp, qd->qd_count);
167 spin_unlock(&sdp->sd_quota_spin);
170 static void qd_put(struct gfs2_quota_data *qd)
172 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
173 spin_lock(&sdp->sd_quota_spin);
174 gfs2_assert(sdp, qd->qd_count);
176 qd->qd_last_touched = jiffies;
177 spin_unlock(&sdp->sd_quota_spin);
180 static int slot_get(struct gfs2_quota_data *qd)
182 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
183 unsigned int c, o = 0, b;
184 unsigned char byte = 0;
186 spin_lock(&sdp->sd_quota_spin);
188 if (qd->qd_slot_count++) {
189 spin_unlock(&sdp->sd_quota_spin);
193 for (c = 0; c < sdp->sd_quota_chunks; c++)
194 for (o = 0; o < PAGE_SIZE; o++) {
195 byte = sdp->sd_quota_bitmap[c][o];
203 for (b = 0; b < 8; b++)
204 if (!(byte & (1 << b)))
206 qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b;
208 if (qd->qd_slot >= sdp->sd_quota_slots)
211 sdp->sd_quota_bitmap[c][o] |= 1 << b;
213 spin_unlock(&sdp->sd_quota_spin);
219 spin_unlock(&sdp->sd_quota_spin);
223 static void slot_hold(struct gfs2_quota_data *qd)
225 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
227 spin_lock(&sdp->sd_quota_spin);
228 gfs2_assert(sdp, qd->qd_slot_count);
230 spin_unlock(&sdp->sd_quota_spin);
233 static void slot_put(struct gfs2_quota_data *qd)
235 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
237 spin_lock(&sdp->sd_quota_spin);
238 gfs2_assert(sdp, qd->qd_slot_count);
239 if (!--qd->qd_slot_count) {
240 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0);
243 spin_unlock(&sdp->sd_quota_spin);
246 static int bh_get(struct gfs2_quota_data *qd)
248 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
249 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
250 unsigned int block, offset;
253 struct buffer_head *bh;
257 mutex_lock(&sdp->sd_quota_mutex);
259 if (qd->qd_bh_count++) {
260 mutex_unlock(&sdp->sd_quota_mutex);
264 block = qd->qd_slot / sdp->sd_qc_per_block;
265 offset = qd->qd_slot % sdp->sd_qc_per_block;;
267 error = gfs2_block_map(&ip->i_inode, block, &new, &dblock, &boundary);
270 error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT, &bh);
274 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
278 qd->qd_bh_qc = (struct gfs2_quota_change *)
279 (bh->b_data + sizeof(struct gfs2_meta_header) +
280 offset * sizeof(struct gfs2_quota_change));
282 mutex_lock(&sdp->sd_quota_mutex);
290 mutex_unlock(&sdp->sd_quota_mutex);
294 static void bh_put(struct gfs2_quota_data *qd)
296 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
298 mutex_lock(&sdp->sd_quota_mutex);
299 gfs2_assert(sdp, qd->qd_bh_count);
300 if (!--qd->qd_bh_count) {
305 mutex_unlock(&sdp->sd_quota_mutex);
308 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
310 struct gfs2_quota_data *qd = NULL;
316 if (sdp->sd_vfs->s_flags & MS_RDONLY)
319 spin_lock(&sdp->sd_quota_spin);
321 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
322 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
323 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
324 qd->qd_sync_gen >= sdp->sd_quota_sync_gen)
327 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
329 set_bit(QDF_LOCKED, &qd->qd_flags);
330 gfs2_assert_warn(sdp, qd->qd_count);
332 qd->qd_change_sync = qd->qd_change;
333 gfs2_assert_warn(sdp, qd->qd_slot_count);
343 spin_unlock(&sdp->sd_quota_spin);
346 gfs2_assert_warn(sdp, qd->qd_change_sync);
349 clear_bit(QDF_LOCKED, &qd->qd_flags);
361 static int qd_trylock(struct gfs2_quota_data *qd)
363 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
365 if (sdp->sd_vfs->s_flags & MS_RDONLY)
368 spin_lock(&sdp->sd_quota_spin);
370 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
371 !test_bit(QDF_CHANGE, &qd->qd_flags)) {
372 spin_unlock(&sdp->sd_quota_spin);
376 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
378 set_bit(QDF_LOCKED, &qd->qd_flags);
379 gfs2_assert_warn(sdp, qd->qd_count);
381 qd->qd_change_sync = qd->qd_change;
382 gfs2_assert_warn(sdp, qd->qd_slot_count);
385 spin_unlock(&sdp->sd_quota_spin);
387 gfs2_assert_warn(sdp, qd->qd_change_sync);
389 clear_bit(QDF_LOCKED, &qd->qd_flags);
398 static void qd_unlock(struct gfs2_quota_data *qd)
400 gfs2_assert_warn(qd->qd_gl->gl_sbd,
401 test_bit(QDF_LOCKED, &qd->qd_flags));
402 clear_bit(QDF_LOCKED, &qd->qd_flags);
408 static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
409 struct gfs2_quota_data **qdp)
413 error = qd_get(sdp, user, id, create, qdp);
417 error = slot_get(*qdp);
421 error = bh_get(*qdp);
434 static void qdsb_put(struct gfs2_quota_data *qd)
441 int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
443 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
444 struct gfs2_alloc *al = &ip->i_alloc;
445 struct gfs2_quota_data **qd = al->al_qd;
448 if (gfs2_assert_warn(sdp, !al->al_qd_num) ||
449 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
452 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
455 error = qdsb_get(sdp, QUOTA_USER, ip->i_di.di_uid, CREATE, qd);
461 error = qdsb_get(sdp, QUOTA_GROUP, ip->i_di.di_gid, CREATE, qd);
467 if (uid != NO_QUOTA_CHANGE && uid != ip->i_di.di_uid) {
468 error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd);
475 if (gid != NO_QUOTA_CHANGE && gid != ip->i_di.di_gid) {
476 error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd);
485 gfs2_quota_unhold(ip);
489 void gfs2_quota_unhold(struct gfs2_inode *ip)
491 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
492 struct gfs2_alloc *al = &ip->i_alloc;
495 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
497 for (x = 0; x < al->al_qd_num; x++) {
498 qdsb_put(al->al_qd[x]);
504 static int sort_qd(const void *a, const void *b)
506 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
507 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
509 if (!test_bit(QDF_USER, &qd_a->qd_flags) !=
510 !test_bit(QDF_USER, &qd_b->qd_flags)) {
511 if (test_bit(QDF_USER, &qd_a->qd_flags))
516 if (qd_a->qd_id < qd_b->qd_id)
518 if (qd_a->qd_id > qd_b->qd_id)
524 static void do_qc(struct gfs2_quota_data *qd, s64 change)
526 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
527 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
528 struct gfs2_quota_change *qc = qd->qd_bh_qc;
531 mutex_lock(&sdp->sd_quota_mutex);
532 gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1);
534 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
537 if (test_bit(QDF_USER, &qd->qd_flags))
538 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
539 qc->qc_id = cpu_to_be32(qd->qd_id);
543 x = be64_to_cpu(x) + change;
544 qc->qc_change = cpu_to_be64(x);
546 spin_lock(&sdp->sd_quota_spin);
548 spin_unlock(&sdp->sd_quota_spin);
551 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
552 clear_bit(QDF_CHANGE, &qd->qd_flags);
557 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
562 mutex_unlock(&sdp->sd_quota_mutex);
568 * This function was mostly borrowed from gfs2_block_truncate_page which was
569 * in turn mostly borrowed from ext3
571 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
572 s64 change, struct gfs2_quota_data *qd)
574 struct inode *inode = &ip->i_inode;
575 struct address_space *mapping = inode->i_mapping;
576 unsigned long index = loc >> PAGE_CACHE_SHIFT;
577 unsigned offset = loc & (PAGE_CACHE_SHIFT - 1);
578 unsigned blocksize, iblock, pos;
579 struct buffer_head *bh;
586 page = grab_cache_page(mapping, index);
590 blocksize = inode->i_sb->s_blocksize;
591 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
593 if (!page_has_buffers(page))
594 create_empty_buffers(page, blocksize, 0);
596 bh = page_buffers(page);
598 while (offset >= pos) {
599 bh = bh->b_this_page;
604 if (!buffer_mapped(bh)) {
605 gfs2_get_block(inode, iblock, bh, 1);
606 if (!buffer_mapped(bh))
610 if (PageUptodate(page))
611 set_buffer_uptodate(bh);
613 if (!buffer_uptodate(bh)) {
614 ll_rw_block(READ, 1, &bh);
616 if (!buffer_uptodate(bh))
620 gfs2_trans_add_bh(ip->i_gl, bh, 0);
622 kaddr = kmap_atomic(page, KM_USER0);
623 ptr = kaddr + offset;
624 value = (s64)be64_to_cpu(*ptr) + change;
625 *ptr = cpu_to_be64(value);
626 flush_dcache_page(page);
627 kunmap_atomic(kaddr, KM_USER0);
629 qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC);
630 qd->qd_qb.qb_value = cpu_to_be64(value);
633 page_cache_release(page);
637 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
639 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
640 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
641 unsigned int data_blocks, ind_blocks;
642 struct gfs2_holder *ghs, i_gh;
644 struct gfs2_quota_data *qd;
646 unsigned int nalloc = 0;
647 struct gfs2_alloc *al = NULL;
650 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
651 &data_blocks, &ind_blocks);
653 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_KERNEL);
657 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
658 for (qx = 0; qx < num_qd; qx++) {
659 error = gfs2_glock_nq_init(qda[qx]->qd_gl,
661 GL_NOCACHE, &ghs[qx]);
666 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
670 for (x = 0; x < num_qd; x++) {
673 offset = qd2offset(qda[x]);
674 error = gfs2_write_alloc_required(ip, offset,
675 sizeof(struct gfs2_quota),
684 al = gfs2_alloc_get(ip);
686 al->al_requested = nalloc * (data_blocks + ind_blocks);
688 error = gfs2_inplace_reserve(ip);
692 error = gfs2_trans_begin(sdp,
693 al->al_rgd->rd_ri.ri_length +
694 num_qd * data_blocks +
695 nalloc * ind_blocks +
696 RES_DINODE + num_qd +
701 error = gfs2_trans_begin(sdp,
702 num_qd * data_blocks +
703 RES_DINODE + num_qd, 0);
708 for (x = 0; x < num_qd; x++) {
710 offset = qd2offset(qd);
711 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync,
712 (struct gfs2_quota_data *)
717 do_qc(qd, -qd->qd_change_sync);
726 gfs2_inplace_release(ip);
731 gfs2_glock_dq_uninit(&i_gh);
734 gfs2_glock_dq_uninit(&ghs[qx]);
736 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
740 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
741 struct gfs2_holder *q_gh)
743 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
744 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
745 struct gfs2_holder i_gh;
747 char buf[sizeof(struct gfs2_quota)];
748 struct file_ra_state ra_state;
750 struct gfs2_quota_lvb *qlvb;
752 file_ra_state_init(&ra_state, sdp->sd_quota_inode->i_mapping);
754 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
758 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
760 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
762 gfs2_glock_dq_uninit(q_gh);
763 error = gfs2_glock_nq_init(qd->qd_gl,
764 LM_ST_EXCLUSIVE, GL_NOCACHE,
769 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
773 memset(buf, 0, sizeof(struct gfs2_quota));
775 error = gfs2_internal_read(ip, &ra_state, buf,
776 &pos, sizeof(struct gfs2_quota));
780 gfs2_glock_dq_uninit(&i_gh);
783 gfs2_quota_in(&q, buf);
784 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
785 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
787 qlvb->qb_limit = cpu_to_be64(q.qu_limit);
788 qlvb->qb_warn = cpu_to_be64(q.qu_warn);
789 qlvb->qb_value = cpu_to_be64(q.qu_value);
792 if (gfs2_glock_is_blocking(qd->qd_gl)) {
793 gfs2_glock_dq_uninit(q_gh);
802 gfs2_glock_dq_uninit(&i_gh);
804 gfs2_glock_dq_uninit(q_gh);
808 int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
810 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
811 struct gfs2_alloc *al = &ip->i_alloc;
815 gfs2_quota_hold(ip, uid, gid);
817 if (capable(CAP_SYS_RESOURCE) ||
818 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
821 sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *),
824 for (x = 0; x < al->al_qd_num; x++) {
825 error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]);
831 set_bit(GIF_QD_LOCKED, &ip->i_flags);
834 gfs2_glock_dq_uninit(&al->al_qd_ghs[x]);
835 gfs2_quota_unhold(ip);
841 static int need_sync(struct gfs2_quota_data *qd)
843 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
844 struct gfs2_tune *gt = &sdp->sd_tune;
846 unsigned int num, den;
849 if (!qd->qd_qb.qb_limit)
852 spin_lock(&sdp->sd_quota_spin);
853 value = qd->qd_change;
854 spin_unlock(&sdp->sd_quota_spin);
856 spin_lock(>->gt_spin);
857 num = gt->gt_quota_scale_num;
858 den = gt->gt_quota_scale_den;
859 spin_unlock(>->gt_spin);
863 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
864 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
867 value *= gfs2_jindex_size(sdp) * num;
869 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
870 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
877 void gfs2_quota_unlock(struct gfs2_inode *ip)
879 struct gfs2_alloc *al = &ip->i_alloc;
880 struct gfs2_quota_data *qda[4];
881 unsigned int count = 0;
884 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
887 for (x = 0; x < al->al_qd_num; x++) {
888 struct gfs2_quota_data *qd;
892 sync = need_sync(qd);
894 gfs2_glock_dq_uninit(&al->al_qd_ghs[x]);
896 if (sync && qd_trylock(qd))
902 for (x = 0; x < count; x++)
907 gfs2_quota_unhold(ip);
912 static int print_message(struct gfs2_quota_data *qd, char *type)
914 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
916 printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\r\n",
917 sdp->sd_fsname, type,
918 (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group",
924 int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
926 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
927 struct gfs2_alloc *al = &ip->i_alloc;
928 struct gfs2_quota_data *qd;
933 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
936 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
939 for (x = 0; x < al->al_qd_num; x++) {
942 if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) ||
943 (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))))
946 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
947 spin_lock(&sdp->sd_quota_spin);
948 value += qd->qd_change;
949 spin_unlock(&sdp->sd_quota_spin);
951 if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
952 print_message(qd, "exceeded");
955 } else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
956 (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
957 time_after_eq(jiffies, qd->qd_last_warn +
959 gt_quota_warn_period) * HZ)) {
960 error = print_message(qd, "warning");
961 qd->qd_last_warn = jiffies;
968 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
971 struct gfs2_alloc *al = &ip->i_alloc;
972 struct gfs2_quota_data *qd;
974 unsigned int found = 0;
976 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
978 if (ip->i_di.di_flags & GFS2_DIF_SYSTEM)
981 for (x = 0; x < al->al_qd_num; x++) {
984 if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) ||
985 (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) {
992 int gfs2_quota_sync(struct gfs2_sbd *sdp)
994 struct gfs2_quota_data **qda;
995 unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
1000 sdp->sd_quota_sync_gen++;
1002 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1010 error = qd_fish(sdp, qda + num_qd);
1011 if (error || !qda[num_qd])
1013 if (++num_qd == max_qd)
1019 error = do_sync(num_qd, qda);
1021 for (x = 0; x < num_qd; x++)
1022 qda[x]->qd_sync_gen =
1023 sdp->sd_quota_sync_gen;
1025 for (x = 0; x < num_qd; x++)
1028 } while (!error && num_qd == max_qd);
1035 int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
1037 struct gfs2_quota_data *qd;
1038 struct gfs2_holder q_gh;
1041 error = qd_get(sdp, user, id, CREATE, &qd);
1045 error = do_glock(qd, FORCE, &q_gh);
1047 gfs2_glock_dq_uninit(&q_gh);
1054 int gfs2_quota_init(struct gfs2_sbd *sdp)
1056 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1057 unsigned int blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift;
1058 unsigned int x, slot = 0;
1059 unsigned int found = 0;
1064 if (!ip->i_di.di_size ||
1065 ip->i_di.di_size > (64 << 20) ||
1066 ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1)) {
1067 gfs2_consist_inode(ip);
1070 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1071 sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE);
1075 sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks,
1076 sizeof(unsigned char *), GFP_KERNEL);
1077 if (!sdp->sd_quota_bitmap)
1080 for (x = 0; x < sdp->sd_quota_chunks; x++) {
1081 sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_KERNEL);
1082 if (!sdp->sd_quota_bitmap[x])
1086 for (x = 0; x < blocks; x++) {
1087 struct buffer_head *bh;
1092 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
1096 gfs2_meta_ra(ip->i_gl, dblock, extlen);
1097 error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT,
1102 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1108 y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1110 struct gfs2_quota_change qc;
1111 struct gfs2_quota_data *qd;
1113 gfs2_quota_change_in(&qc, bh->b_data +
1114 sizeof(struct gfs2_meta_header) +
1115 y * sizeof(struct gfs2_quota_change));
1119 error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER),
1126 set_bit(QDF_CHANGE, &qd->qd_flags);
1127 qd->qd_change = qc.qc_change;
1129 qd->qd_slot_count = 1;
1130 qd->qd_last_touched = jiffies;
1132 spin_lock(&sdp->sd_quota_spin);
1133 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1);
1134 list_add(&qd->qd_list, &sdp->sd_quota_list);
1135 atomic_inc(&sdp->sd_quota_count);
1136 spin_unlock(&sdp->sd_quota_spin);
1147 fs_info(sdp, "found %u quota changes\n", found);
1152 gfs2_quota_cleanup(sdp);
1156 void gfs2_quota_scan(struct gfs2_sbd *sdp)
1158 struct gfs2_quota_data *qd, *safe;
1161 spin_lock(&sdp->sd_quota_spin);
1162 list_for_each_entry_safe(qd, safe, &sdp->sd_quota_list, qd_list) {
1163 if (!qd->qd_count &&
1164 time_after_eq(jiffies, qd->qd_last_touched +
1165 gfs2_tune_get(sdp, gt_quota_cache_secs) * HZ)) {
1166 list_move(&qd->qd_list, &dead);
1167 gfs2_assert_warn(sdp,
1168 atomic_read(&sdp->sd_quota_count) > 0);
1169 atomic_dec(&sdp->sd_quota_count);
1172 spin_unlock(&sdp->sd_quota_spin);
1174 while (!list_empty(&dead)) {
1175 qd = list_entry(dead.next, struct gfs2_quota_data, qd_list);
1176 list_del(&qd->qd_list);
1178 gfs2_assert_warn(sdp, !qd->qd_change);
1179 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1180 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1182 gfs2_lvb_unhold(qd->qd_gl);
1187 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1189 struct list_head *head = &sdp->sd_quota_list;
1190 struct gfs2_quota_data *qd;
1193 spin_lock(&sdp->sd_quota_spin);
1194 while (!list_empty(head)) {
1195 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1197 if (qd->qd_count > 1 ||
1198 (qd->qd_count && !test_bit(QDF_CHANGE, &qd->qd_flags))) {
1199 list_move(&qd->qd_list, head);
1200 spin_unlock(&sdp->sd_quota_spin);
1202 spin_lock(&sdp->sd_quota_spin);
1206 list_del(&qd->qd_list);
1207 atomic_dec(&sdp->sd_quota_count);
1208 spin_unlock(&sdp->sd_quota_spin);
1210 if (!qd->qd_count) {
1211 gfs2_assert_warn(sdp, !qd->qd_change);
1212 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1214 gfs2_assert_warn(sdp, qd->qd_slot_count == 1);
1215 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1217 gfs2_lvb_unhold(qd->qd_gl);
1220 spin_lock(&sdp->sd_quota_spin);
1222 spin_unlock(&sdp->sd_quota_spin);
1224 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1226 if (sdp->sd_quota_bitmap) {
1227 for (x = 0; x < sdp->sd_quota_chunks; x++)
1228 kfree(sdp->sd_quota_bitmap[x]);
1229 kfree(sdp->sd_quota_bitmap);